nfs_subs.c revision 1.54
1 /* $NetBSD: nfs_subs.c,v 1.54 1998/02/10 14:10:16 mrg 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 "opt_uvm.h" 42 43 /* 44 * These functions support the macros and help fiddle mbuf chains for 45 * the nfs op functions. They do things like create the rpc header and 46 * copy data between mbuf chains and uio lists. 47 */ 48 #include <sys/param.h> 49 #include <sys/proc.h> 50 #include <sys/systm.h> 51 #include <sys/kernel.h> 52 #include <sys/mount.h> 53 #include <sys/vnode.h> 54 #include <sys/namei.h> 55 #include <sys/mbuf.h> 56 #include <sys/socket.h> 57 #include <sys/stat.h> 58 #include <sys/malloc.h> 59 #include <sys/time.h> 60 #include <sys/dirent.h> 61 62 #include <vm/vm.h> 63 64 #if defined(UVM) 65 #include <uvm/uvm_extern.h> 66 #endif 67 68 #include <nfs/rpcv2.h> 69 #include <nfs/nfsproto.h> 70 #include <nfs/nfsnode.h> 71 #include <nfs/nfs.h> 72 #include <nfs/xdr_subs.h> 73 #include <nfs/nfsm_subs.h> 74 #include <nfs/nfsmount.h> 75 #include <nfs/nqnfs.h> 76 #include <nfs/nfsrtt.h> 77 #include <nfs/nfs_var.h> 78 79 #include <miscfs/specfs/specdev.h> 80 81 #include <vm/vm.h> 82 83 #include <netinet/in.h> 84 #ifdef ISO 85 #include <netiso/iso.h> 86 #endif 87 88 /* 89 * Data items converted to xdr at startup, since they are constant 90 * This is kinda hokey, but may save a little time doing byte swaps 91 */ 92 u_int32_t nfs_xdrneg1; 93 u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 94 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 95 rpc_auth_kerb; 96 u_int32_t nfs_prog, nqnfs_prog, nfs_true, nfs_false; 97 98 /* And other global data */ 99 static u_int32_t nfs_xid = 0; 100 nfstype nfsv2_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON, 101 NFCHR, NFNON }; 102 nfstype nfsv3_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFSOCK, 103 NFFIFO, NFNON }; 104 enum vtype nv2tov_type[8] = { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON }; 105 enum vtype nv3tov_type[8]={ VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO }; 106 int nfs_ticks; 107 extern struct nfs_public nfs_pub; 108 109 /* NFS client/server stats. */ 110 struct nfsstats nfsstats; 111 112 /* 113 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 114 */ 115 int nfsv3_procid[NFS_NPROCS] = { 116 NFSPROC_NULL, 117 NFSPROC_GETATTR, 118 NFSPROC_SETATTR, 119 NFSPROC_NOOP, 120 NFSPROC_LOOKUP, 121 NFSPROC_READLINK, 122 NFSPROC_READ, 123 NFSPROC_NOOP, 124 NFSPROC_WRITE, 125 NFSPROC_CREATE, 126 NFSPROC_REMOVE, 127 NFSPROC_RENAME, 128 NFSPROC_LINK, 129 NFSPROC_SYMLINK, 130 NFSPROC_MKDIR, 131 NFSPROC_RMDIR, 132 NFSPROC_READDIR, 133 NFSPROC_FSSTAT, 134 NFSPROC_NOOP, 135 NFSPROC_NOOP, 136 NFSPROC_NOOP, 137 NFSPROC_NOOP, 138 NFSPROC_NOOP, 139 NFSPROC_NOOP, 140 NFSPROC_NOOP, 141 NFSPROC_NOOP 142 }; 143 144 /* 145 * and the reverse mapping from generic to Version 2 procedure numbers 146 */ 147 int nfsv2_procid[NFS_NPROCS] = { 148 NFSV2PROC_NULL, 149 NFSV2PROC_GETATTR, 150 NFSV2PROC_SETATTR, 151 NFSV2PROC_LOOKUP, 152 NFSV2PROC_NOOP, 153 NFSV2PROC_READLINK, 154 NFSV2PROC_READ, 155 NFSV2PROC_WRITE, 156 NFSV2PROC_CREATE, 157 NFSV2PROC_MKDIR, 158 NFSV2PROC_SYMLINK, 159 NFSV2PROC_CREATE, 160 NFSV2PROC_REMOVE, 161 NFSV2PROC_RMDIR, 162 NFSV2PROC_RENAME, 163 NFSV2PROC_LINK, 164 NFSV2PROC_READDIR, 165 NFSV2PROC_NOOP, 166 NFSV2PROC_STATFS, 167 NFSV2PROC_NOOP, 168 NFSV2PROC_NOOP, 169 NFSV2PROC_NOOP, 170 NFSV2PROC_NOOP, 171 NFSV2PROC_NOOP, 172 NFSV2PROC_NOOP, 173 NFSV2PROC_NOOP, 174 }; 175 176 /* 177 * Maps errno values to nfs error numbers. 178 * Use NFSERR_IO as the catch all for ones not specifically defined in 179 * RFC 1094. 180 */ 181 static u_char nfsrv_v2errmap[ELAST] = { 182 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 183 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 184 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 185 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 186 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 187 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 188 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 189 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 190 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 191 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 192 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 193 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 194 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 195 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 196 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 197 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 198 NFSERR_IO, NFSERR_IO, 199 }; 200 201 /* 202 * Maps errno values to nfs error numbers. 203 * Although it is not obvious whether or not NFS clients really care if 204 * a returned error value is in the specified list for the procedure, the 205 * safest thing to do is filter them appropriately. For Version 2, the 206 * X/Open XNFS document is the only specification that defines error values 207 * for each RPC (The RFC simply lists all possible error values for all RPCs), 208 * so I have decided to not do this for Version 2. 209 * The first entry is the default error return and the rest are the valid 210 * errors for that RPC in increasing numeric order. 211 */ 212 static short nfsv3err_null[] = { 213 0, 214 0, 215 }; 216 217 static short nfsv3err_getattr[] = { 218 NFSERR_IO, 219 NFSERR_IO, 220 NFSERR_STALE, 221 NFSERR_BADHANDLE, 222 NFSERR_SERVERFAULT, 223 0, 224 }; 225 226 static short nfsv3err_setattr[] = { 227 NFSERR_IO, 228 NFSERR_PERM, 229 NFSERR_IO, 230 NFSERR_ACCES, 231 NFSERR_INVAL, 232 NFSERR_NOSPC, 233 NFSERR_ROFS, 234 NFSERR_DQUOT, 235 NFSERR_STALE, 236 NFSERR_BADHANDLE, 237 NFSERR_NOT_SYNC, 238 NFSERR_SERVERFAULT, 239 0, 240 }; 241 242 static short nfsv3err_lookup[] = { 243 NFSERR_IO, 244 NFSERR_NOENT, 245 NFSERR_IO, 246 NFSERR_ACCES, 247 NFSERR_NOTDIR, 248 NFSERR_NAMETOL, 249 NFSERR_STALE, 250 NFSERR_BADHANDLE, 251 NFSERR_SERVERFAULT, 252 0, 253 }; 254 255 static short nfsv3err_access[] = { 256 NFSERR_IO, 257 NFSERR_IO, 258 NFSERR_STALE, 259 NFSERR_BADHANDLE, 260 NFSERR_SERVERFAULT, 261 0, 262 }; 263 264 static short nfsv3err_readlink[] = { 265 NFSERR_IO, 266 NFSERR_IO, 267 NFSERR_ACCES, 268 NFSERR_INVAL, 269 NFSERR_STALE, 270 NFSERR_BADHANDLE, 271 NFSERR_NOTSUPP, 272 NFSERR_SERVERFAULT, 273 0, 274 }; 275 276 static short nfsv3err_read[] = { 277 NFSERR_IO, 278 NFSERR_IO, 279 NFSERR_NXIO, 280 NFSERR_ACCES, 281 NFSERR_INVAL, 282 NFSERR_STALE, 283 NFSERR_BADHANDLE, 284 NFSERR_SERVERFAULT, 285 0, 286 }; 287 288 static short nfsv3err_write[] = { 289 NFSERR_IO, 290 NFSERR_IO, 291 NFSERR_ACCES, 292 NFSERR_INVAL, 293 NFSERR_FBIG, 294 NFSERR_NOSPC, 295 NFSERR_ROFS, 296 NFSERR_DQUOT, 297 NFSERR_STALE, 298 NFSERR_BADHANDLE, 299 NFSERR_SERVERFAULT, 300 0, 301 }; 302 303 static short nfsv3err_create[] = { 304 NFSERR_IO, 305 NFSERR_IO, 306 NFSERR_ACCES, 307 NFSERR_EXIST, 308 NFSERR_NOTDIR, 309 NFSERR_NOSPC, 310 NFSERR_ROFS, 311 NFSERR_NAMETOL, 312 NFSERR_DQUOT, 313 NFSERR_STALE, 314 NFSERR_BADHANDLE, 315 NFSERR_NOTSUPP, 316 NFSERR_SERVERFAULT, 317 0, 318 }; 319 320 static short nfsv3err_mkdir[] = { 321 NFSERR_IO, 322 NFSERR_IO, 323 NFSERR_ACCES, 324 NFSERR_EXIST, 325 NFSERR_NOTDIR, 326 NFSERR_NOSPC, 327 NFSERR_ROFS, 328 NFSERR_NAMETOL, 329 NFSERR_DQUOT, 330 NFSERR_STALE, 331 NFSERR_BADHANDLE, 332 NFSERR_NOTSUPP, 333 NFSERR_SERVERFAULT, 334 0, 335 }; 336 337 static short nfsv3err_symlink[] = { 338 NFSERR_IO, 339 NFSERR_IO, 340 NFSERR_ACCES, 341 NFSERR_EXIST, 342 NFSERR_NOTDIR, 343 NFSERR_NOSPC, 344 NFSERR_ROFS, 345 NFSERR_NAMETOL, 346 NFSERR_DQUOT, 347 NFSERR_STALE, 348 NFSERR_BADHANDLE, 349 NFSERR_NOTSUPP, 350 NFSERR_SERVERFAULT, 351 0, 352 }; 353 354 static short nfsv3err_mknod[] = { 355 NFSERR_IO, 356 NFSERR_IO, 357 NFSERR_ACCES, 358 NFSERR_EXIST, 359 NFSERR_NOTDIR, 360 NFSERR_NOSPC, 361 NFSERR_ROFS, 362 NFSERR_NAMETOL, 363 NFSERR_DQUOT, 364 NFSERR_STALE, 365 NFSERR_BADHANDLE, 366 NFSERR_NOTSUPP, 367 NFSERR_SERVERFAULT, 368 NFSERR_BADTYPE, 369 0, 370 }; 371 372 static short nfsv3err_remove[] = { 373 NFSERR_IO, 374 NFSERR_NOENT, 375 NFSERR_IO, 376 NFSERR_ACCES, 377 NFSERR_NOTDIR, 378 NFSERR_ROFS, 379 NFSERR_NAMETOL, 380 NFSERR_STALE, 381 NFSERR_BADHANDLE, 382 NFSERR_SERVERFAULT, 383 0, 384 }; 385 386 static short nfsv3err_rmdir[] = { 387 NFSERR_IO, 388 NFSERR_NOENT, 389 NFSERR_IO, 390 NFSERR_ACCES, 391 NFSERR_EXIST, 392 NFSERR_NOTDIR, 393 NFSERR_INVAL, 394 NFSERR_ROFS, 395 NFSERR_NAMETOL, 396 NFSERR_NOTEMPTY, 397 NFSERR_STALE, 398 NFSERR_BADHANDLE, 399 NFSERR_NOTSUPP, 400 NFSERR_SERVERFAULT, 401 0, 402 }; 403 404 static short nfsv3err_rename[] = { 405 NFSERR_IO, 406 NFSERR_NOENT, 407 NFSERR_IO, 408 NFSERR_ACCES, 409 NFSERR_EXIST, 410 NFSERR_XDEV, 411 NFSERR_NOTDIR, 412 NFSERR_ISDIR, 413 NFSERR_INVAL, 414 NFSERR_NOSPC, 415 NFSERR_ROFS, 416 NFSERR_MLINK, 417 NFSERR_NAMETOL, 418 NFSERR_NOTEMPTY, 419 NFSERR_DQUOT, 420 NFSERR_STALE, 421 NFSERR_BADHANDLE, 422 NFSERR_NOTSUPP, 423 NFSERR_SERVERFAULT, 424 0, 425 }; 426 427 static short nfsv3err_link[] = { 428 NFSERR_IO, 429 NFSERR_IO, 430 NFSERR_ACCES, 431 NFSERR_EXIST, 432 NFSERR_XDEV, 433 NFSERR_NOTDIR, 434 NFSERR_INVAL, 435 NFSERR_NOSPC, 436 NFSERR_ROFS, 437 NFSERR_MLINK, 438 NFSERR_NAMETOL, 439 NFSERR_DQUOT, 440 NFSERR_STALE, 441 NFSERR_BADHANDLE, 442 NFSERR_NOTSUPP, 443 NFSERR_SERVERFAULT, 444 0, 445 }; 446 447 static short nfsv3err_readdir[] = { 448 NFSERR_IO, 449 NFSERR_IO, 450 NFSERR_ACCES, 451 NFSERR_NOTDIR, 452 NFSERR_STALE, 453 NFSERR_BADHANDLE, 454 NFSERR_BAD_COOKIE, 455 NFSERR_TOOSMALL, 456 NFSERR_SERVERFAULT, 457 0, 458 }; 459 460 static short nfsv3err_readdirplus[] = { 461 NFSERR_IO, 462 NFSERR_IO, 463 NFSERR_ACCES, 464 NFSERR_NOTDIR, 465 NFSERR_STALE, 466 NFSERR_BADHANDLE, 467 NFSERR_BAD_COOKIE, 468 NFSERR_NOTSUPP, 469 NFSERR_TOOSMALL, 470 NFSERR_SERVERFAULT, 471 0, 472 }; 473 474 static short nfsv3err_fsstat[] = { 475 NFSERR_IO, 476 NFSERR_IO, 477 NFSERR_STALE, 478 NFSERR_BADHANDLE, 479 NFSERR_SERVERFAULT, 480 0, 481 }; 482 483 static short nfsv3err_fsinfo[] = { 484 NFSERR_STALE, 485 NFSERR_STALE, 486 NFSERR_BADHANDLE, 487 NFSERR_SERVERFAULT, 488 0, 489 }; 490 491 static short nfsv3err_pathconf[] = { 492 NFSERR_STALE, 493 NFSERR_STALE, 494 NFSERR_BADHANDLE, 495 NFSERR_SERVERFAULT, 496 0, 497 }; 498 499 static short nfsv3err_commit[] = { 500 NFSERR_IO, 501 NFSERR_IO, 502 NFSERR_STALE, 503 NFSERR_BADHANDLE, 504 NFSERR_SERVERFAULT, 505 0, 506 }; 507 508 static short *nfsrv_v3errmap[] = { 509 nfsv3err_null, 510 nfsv3err_getattr, 511 nfsv3err_setattr, 512 nfsv3err_lookup, 513 nfsv3err_access, 514 nfsv3err_readlink, 515 nfsv3err_read, 516 nfsv3err_write, 517 nfsv3err_create, 518 nfsv3err_mkdir, 519 nfsv3err_symlink, 520 nfsv3err_mknod, 521 nfsv3err_remove, 522 nfsv3err_rmdir, 523 nfsv3err_rename, 524 nfsv3err_link, 525 nfsv3err_readdir, 526 nfsv3err_readdirplus, 527 nfsv3err_fsstat, 528 nfsv3err_fsinfo, 529 nfsv3err_pathconf, 530 nfsv3err_commit, 531 }; 532 533 extern struct nfsrtt nfsrtt; 534 extern time_t nqnfsstarttime; 535 extern int nqsrv_clockskew; 536 extern int nqsrv_writeslack; 537 extern int nqsrv_maxlease; 538 extern int nqnfs_piggy[NFS_NPROCS]; 539 extern nfstype nfsv2_type[9]; 540 extern nfstype nfsv3_type[9]; 541 extern struct nfsnodehashhead *nfsnodehashtbl; 542 extern u_long nfsnodehash; 543 544 LIST_HEAD(nfsnodehashhead, nfsnode); 545 u_long nfsdirhashmask; 546 547 int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 548 549 /* 550 * Create the header for an rpc request packet 551 * The hsiz is the size of the rest of the nfs request header. 552 * (just used to decide if a cluster is a good idea) 553 */ 554 struct mbuf * 555 nfsm_reqh(vp, procid, hsiz, bposp) 556 struct vnode *vp; 557 u_long procid; 558 int hsiz; 559 caddr_t *bposp; 560 { 561 register struct mbuf *mb; 562 register u_int32_t *tl; 563 register caddr_t bpos; 564 struct mbuf *mb2; 565 struct nfsmount *nmp; 566 int nqflag; 567 568 MGET(mb, M_WAIT, MT_DATA); 569 if (hsiz >= MINCLSIZE) 570 MCLGET(mb, M_WAIT); 571 mb->m_len = 0; 572 bpos = mtod(mb, caddr_t); 573 574 /* 575 * For NQNFS, add lease request. 576 */ 577 if (vp) { 578 nmp = VFSTONFS(vp->v_mount); 579 if (nmp->nm_flag & NFSMNT_NQNFS) { 580 nqflag = NQNFS_NEEDLEASE(vp, procid); 581 if (nqflag) { 582 nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED); 583 *tl++ = txdr_unsigned(nqflag); 584 *tl = txdr_unsigned(nmp->nm_leaseterm); 585 } else { 586 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 587 *tl = 0; 588 } 589 } 590 } 591 /* Finally, return values */ 592 *bposp = bpos; 593 return (mb); 594 } 595 596 /* 597 * Build the RPC header and fill in the authorization info. 598 * The authorization string argument is only used when the credentials 599 * come from outside of the kernel. 600 * Returns the head of the mbuf list. 601 */ 602 struct mbuf * 603 nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 604 verf_str, mrest, mrest_len, mbp, xidp) 605 register struct ucred *cr; 606 int nmflag; 607 int procid; 608 int auth_type; 609 int auth_len; 610 char *auth_str; 611 int verf_len; 612 char *verf_str; 613 struct mbuf *mrest; 614 int mrest_len; 615 struct mbuf **mbp; 616 u_int32_t *xidp; 617 { 618 register struct mbuf *mb; 619 register u_int32_t *tl; 620 register caddr_t bpos; 621 register int i; 622 struct mbuf *mreq, *mb2; 623 int siz, grpsiz, authsiz; 624 struct timeval tv; 625 static u_int32_t base; 626 627 authsiz = nfsm_rndup(auth_len); 628 MGETHDR(mb, M_WAIT, MT_DATA); 629 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 630 MCLGET(mb, M_WAIT); 631 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 632 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 633 } else { 634 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 635 } 636 mb->m_len = 0; 637 mreq = mb; 638 bpos = mtod(mb, caddr_t); 639 640 /* 641 * First the RPC header. 642 */ 643 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 644 645 /* 646 * derive initial xid from system time 647 * XXX time is invalid if root not yet mounted 648 */ 649 if (!base && (rootvp)) { 650 microtime(&tv); 651 base = tv.tv_sec << 12; 652 nfs_xid = base; 653 } 654 /* 655 * Skip zero xid if it should ever happen. 656 */ 657 if (++nfs_xid == 0) 658 nfs_xid++; 659 660 *tl++ = *xidp = txdr_unsigned(nfs_xid); 661 *tl++ = rpc_call; 662 *tl++ = rpc_vers; 663 if (nmflag & NFSMNT_NQNFS) { 664 *tl++ = txdr_unsigned(NQNFS_PROG); 665 *tl++ = txdr_unsigned(NQNFS_VER3); 666 } else { 667 *tl++ = txdr_unsigned(NFS_PROG); 668 if (nmflag & NFSMNT_NFSV3) 669 *tl++ = txdr_unsigned(NFS_VER3); 670 else 671 *tl++ = txdr_unsigned(NFS_VER2); 672 } 673 if (nmflag & NFSMNT_NFSV3) 674 *tl++ = txdr_unsigned(procid); 675 else 676 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 677 678 /* 679 * And then the authorization cred. 680 */ 681 *tl++ = txdr_unsigned(auth_type); 682 *tl = txdr_unsigned(authsiz); 683 switch (auth_type) { 684 case RPCAUTH_UNIX: 685 nfsm_build(tl, u_int32_t *, auth_len); 686 *tl++ = 0; /* stamp ?? */ 687 *tl++ = 0; /* NULL hostname */ 688 *tl++ = txdr_unsigned(cr->cr_uid); 689 *tl++ = txdr_unsigned(cr->cr_gid); 690 grpsiz = (auth_len >> 2) - 5; 691 *tl++ = txdr_unsigned(grpsiz); 692 for (i = 0; i < grpsiz; i++) 693 *tl++ = txdr_unsigned(cr->cr_groups[i]); 694 break; 695 case RPCAUTH_KERB4: 696 siz = auth_len; 697 while (siz > 0) { 698 if (M_TRAILINGSPACE(mb) == 0) { 699 MGET(mb2, M_WAIT, MT_DATA); 700 if (siz >= MINCLSIZE) 701 MCLGET(mb2, M_WAIT); 702 mb->m_next = mb2; 703 mb = mb2; 704 mb->m_len = 0; 705 bpos = mtod(mb, caddr_t); 706 } 707 i = min(siz, M_TRAILINGSPACE(mb)); 708 bcopy(auth_str, bpos, i); 709 mb->m_len += i; 710 auth_str += i; 711 bpos += i; 712 siz -= i; 713 } 714 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 715 for (i = 0; i < siz; i++) 716 *bpos++ = '\0'; 717 mb->m_len += siz; 718 } 719 break; 720 }; 721 722 /* 723 * And the verifier... 724 */ 725 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 726 if (verf_str) { 727 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 728 *tl = txdr_unsigned(verf_len); 729 siz = verf_len; 730 while (siz > 0) { 731 if (M_TRAILINGSPACE(mb) == 0) { 732 MGET(mb2, M_WAIT, MT_DATA); 733 if (siz >= MINCLSIZE) 734 MCLGET(mb2, M_WAIT); 735 mb->m_next = mb2; 736 mb = mb2; 737 mb->m_len = 0; 738 bpos = mtod(mb, caddr_t); 739 } 740 i = min(siz, M_TRAILINGSPACE(mb)); 741 bcopy(verf_str, bpos, i); 742 mb->m_len += i; 743 verf_str += i; 744 bpos += i; 745 siz -= i; 746 } 747 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 748 for (i = 0; i < siz; i++) 749 *bpos++ = '\0'; 750 mb->m_len += siz; 751 } 752 } else { 753 *tl++ = txdr_unsigned(RPCAUTH_NULL); 754 *tl = 0; 755 } 756 mb->m_next = mrest; 757 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 758 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 759 *mbp = mb; 760 return (mreq); 761 } 762 763 /* 764 * copies mbuf chain to the uio scatter/gather list 765 */ 766 int 767 nfsm_mbuftouio(mrep, uiop, siz, dpos) 768 struct mbuf **mrep; 769 register struct uio *uiop; 770 int siz; 771 caddr_t *dpos; 772 { 773 register char *mbufcp, *uiocp; 774 register int xfer, left, len; 775 register struct mbuf *mp; 776 long uiosiz, rem; 777 int error = 0; 778 779 mp = *mrep; 780 mbufcp = *dpos; 781 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 782 rem = nfsm_rndup(siz)-siz; 783 while (siz > 0) { 784 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 785 return (EFBIG); 786 left = uiop->uio_iov->iov_len; 787 uiocp = uiop->uio_iov->iov_base; 788 if (left > siz) 789 left = siz; 790 uiosiz = left; 791 while (left > 0) { 792 while (len == 0) { 793 mp = mp->m_next; 794 if (mp == NULL) 795 return (EBADRPC); 796 mbufcp = mtod(mp, caddr_t); 797 len = mp->m_len; 798 } 799 xfer = (left > len) ? len : left; 800 #ifdef notdef 801 /* Not Yet.. */ 802 if (uiop->uio_iov->iov_op != NULL) 803 (*(uiop->uio_iov->iov_op)) 804 (mbufcp, uiocp, xfer); 805 else 806 #endif 807 if (uiop->uio_segflg == UIO_SYSSPACE) 808 bcopy(mbufcp, uiocp, xfer); 809 else 810 copyout(mbufcp, uiocp, xfer); 811 left -= xfer; 812 len -= xfer; 813 mbufcp += xfer; 814 uiocp += xfer; 815 uiop->uio_offset += xfer; 816 uiop->uio_resid -= xfer; 817 } 818 if (uiop->uio_iov->iov_len <= siz) { 819 uiop->uio_iovcnt--; 820 uiop->uio_iov++; 821 } else { 822 uiop->uio_iov->iov_base += uiosiz; 823 uiop->uio_iov->iov_len -= uiosiz; 824 } 825 siz -= uiosiz; 826 } 827 *dpos = mbufcp; 828 *mrep = mp; 829 if (rem > 0) { 830 if (len < rem) 831 error = nfs_adv(mrep, dpos, rem, len); 832 else 833 *dpos += rem; 834 } 835 return (error); 836 } 837 838 /* 839 * copies a uio scatter/gather list to an mbuf chain. 840 * NOTE: can ony handle iovcnt == 1 841 */ 842 int 843 nfsm_uiotombuf(uiop, mq, siz, bpos) 844 register struct uio *uiop; 845 struct mbuf **mq; 846 int siz; 847 caddr_t *bpos; 848 { 849 register char *uiocp; 850 register struct mbuf *mp, *mp2; 851 register int xfer, left, mlen; 852 int uiosiz, clflg, rem; 853 char *cp; 854 855 #ifdef DIAGNOSTIC 856 if (uiop->uio_iovcnt != 1) 857 panic("nfsm_uiotombuf: iovcnt != 1"); 858 #endif 859 860 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 861 clflg = 1; 862 else 863 clflg = 0; 864 rem = nfsm_rndup(siz)-siz; 865 mp = mp2 = *mq; 866 while (siz > 0) { 867 left = uiop->uio_iov->iov_len; 868 uiocp = uiop->uio_iov->iov_base; 869 if (left > siz) 870 left = siz; 871 uiosiz = left; 872 while (left > 0) { 873 mlen = M_TRAILINGSPACE(mp); 874 if (mlen == 0) { 875 MGET(mp, M_WAIT, MT_DATA); 876 if (clflg) 877 MCLGET(mp, M_WAIT); 878 mp->m_len = 0; 879 mp2->m_next = mp; 880 mp2 = mp; 881 mlen = M_TRAILINGSPACE(mp); 882 } 883 xfer = (left > mlen) ? mlen : left; 884 #ifdef notdef 885 /* Not Yet.. */ 886 if (uiop->uio_iov->iov_op != NULL) 887 (*(uiop->uio_iov->iov_op)) 888 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 889 else 890 #endif 891 if (uiop->uio_segflg == UIO_SYSSPACE) 892 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 893 else 894 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 895 mp->m_len += xfer; 896 left -= xfer; 897 uiocp += xfer; 898 uiop->uio_offset += xfer; 899 uiop->uio_resid -= xfer; 900 } 901 uiop->uio_iov->iov_base += uiosiz; 902 uiop->uio_iov->iov_len -= uiosiz; 903 siz -= uiosiz; 904 } 905 if (rem > 0) { 906 if (rem > M_TRAILINGSPACE(mp)) { 907 MGET(mp, M_WAIT, MT_DATA); 908 mp->m_len = 0; 909 mp2->m_next = mp; 910 } 911 cp = mtod(mp, caddr_t)+mp->m_len; 912 for (left = 0; left < rem; left++) 913 *cp++ = '\0'; 914 mp->m_len += rem; 915 *bpos = cp; 916 } else 917 *bpos = mtod(mp, caddr_t)+mp->m_len; 918 *mq = mp; 919 return (0); 920 } 921 922 /* 923 * Get at least "siz" bytes of correctly aligned data. 924 * When called the mbuf pointers are not necessarily correct, 925 * dsosp points to what ought to be in m_data and left contains 926 * what ought to be in m_len. 927 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 928 * cases. (The macros use the vars. dpos and dpos2) 929 */ 930 int 931 nfsm_disct(mdp, dposp, siz, left, cp2) 932 struct mbuf **mdp; 933 caddr_t *dposp; 934 int siz; 935 int left; 936 caddr_t *cp2; 937 { 938 register struct mbuf *m1, *m2; 939 struct mbuf *havebuf = NULL; 940 caddr_t src = *dposp; 941 caddr_t dst; 942 int len; 943 944 #ifdef DEBUG 945 if (left < 0) 946 panic("nfsm_disct: left < 0"); 947 #endif 948 m1 = *mdp; 949 /* 950 * Skip through the mbuf chain looking for an mbuf with 951 * some data. If the first mbuf found has enough data 952 * and it is correctly aligned return it. 953 */ 954 while (left == 0) { 955 havebuf = m1; 956 *mdp = m1 = m1->m_next; 957 if (m1 == NULL) 958 return (EBADRPC); 959 src = mtod(m1, caddr_t); 960 left = m1->m_len; 961 /* 962 * If we start a new mbuf and it is big enough 963 * and correctly aligned just return it, don't 964 * do any pull up. 965 */ 966 if (left >= siz && nfsm_aligned(src)) { 967 *cp2 = src; 968 *dposp = src + siz; 969 return (0); 970 } 971 } 972 if (m1->m_flags & M_EXT) { 973 if (havebuf) { 974 /* If the first mbuf with data has external data 975 * and there is a previous empty mbuf use it 976 * to move the data into. 977 */ 978 m2 = m1; 979 *mdp = m1 = havebuf; 980 if (m1->m_flags & M_EXT) { 981 MEXTREMOVE(m1); 982 } 983 } else { 984 /* 985 * If the first mbuf has a external data 986 * and there is no previous empty mbuf 987 * allocate a new mbuf and move the external 988 * data to the new mbuf. Also make the first 989 * mbuf look empty. 990 */ 991 m2 = m_get(M_WAIT, MT_DATA); 992 m2->m_ext = m1->m_ext; 993 m2->m_data = src; 994 m2->m_len = left; 995 MCLADDREFERENCE(m1, m2); 996 MEXTREMOVE(m1); 997 m2->m_next = m1->m_next; 998 m1->m_next = m2; 999 } 1000 m1->m_len = 0; 1001 dst = m1->m_dat; 1002 } else { 1003 /* 1004 * If the first mbuf has no external data 1005 * move the data to the front of the mbuf. 1006 */ 1007 if ((dst = m1->m_dat) != src) 1008 ovbcopy(src, dst, left); 1009 dst += left; 1010 m1->m_len = left; 1011 m2 = m1->m_next; 1012 } 1013 m1->m_flags &= ~M_PKTHDR; 1014 *cp2 = m1->m_data = m1->m_dat; /* data is at beginning of buffer */ 1015 *dposp = mtod(m1, caddr_t) + siz; 1016 /* 1017 * Loop through mbufs pulling data up into first mbuf until 1018 * the first mbuf is full or there is no more data to 1019 * pullup. 1020 */ 1021 while ((len = (MLEN - m1->m_len)) != 0 && m2) { 1022 if ((len = min(len, m2->m_len)) != 0) 1023 bcopy(m2->m_data, dst, len); 1024 m1->m_len += len; 1025 dst += len; 1026 m2->m_data += len; 1027 m2->m_len -= len; 1028 m2 = m2->m_next; 1029 } 1030 if (m1->m_len < siz) 1031 return (EBADRPC); 1032 return (0); 1033 } 1034 1035 /* 1036 * Advance the position in the mbuf chain. 1037 */ 1038 int 1039 nfs_adv(mdp, dposp, offs, left) 1040 struct mbuf **mdp; 1041 caddr_t *dposp; 1042 int offs; 1043 int left; 1044 { 1045 register struct mbuf *m; 1046 register int s; 1047 1048 m = *mdp; 1049 s = left; 1050 while (s < offs) { 1051 offs -= s; 1052 m = m->m_next; 1053 if (m == NULL) 1054 return (EBADRPC); 1055 s = m->m_len; 1056 } 1057 *mdp = m; 1058 *dposp = mtod(m, caddr_t)+offs; 1059 return (0); 1060 } 1061 1062 /* 1063 * Copy a string into mbufs for the hard cases... 1064 */ 1065 int 1066 nfsm_strtmbuf(mb, bpos, cp, siz) 1067 struct mbuf **mb; 1068 char **bpos; 1069 const char *cp; 1070 long siz; 1071 { 1072 register struct mbuf *m1 = NULL, *m2; 1073 long left, xfer, len, tlen; 1074 u_int32_t *tl; 1075 int putsize; 1076 1077 putsize = 1; 1078 m2 = *mb; 1079 left = M_TRAILINGSPACE(m2); 1080 if (left > 0) { 1081 tl = ((u_int32_t *)(*bpos)); 1082 *tl++ = txdr_unsigned(siz); 1083 putsize = 0; 1084 left -= NFSX_UNSIGNED; 1085 m2->m_len += NFSX_UNSIGNED; 1086 if (left > 0) { 1087 bcopy(cp, (caddr_t) tl, left); 1088 siz -= left; 1089 cp += left; 1090 m2->m_len += left; 1091 left = 0; 1092 } 1093 } 1094 /* Loop around adding mbufs */ 1095 while (siz > 0) { 1096 MGET(m1, M_WAIT, MT_DATA); 1097 if (siz > MLEN) 1098 MCLGET(m1, M_WAIT); 1099 m1->m_len = NFSMSIZ(m1); 1100 m2->m_next = m1; 1101 m2 = m1; 1102 tl = mtod(m1, u_int32_t *); 1103 tlen = 0; 1104 if (putsize) { 1105 *tl++ = txdr_unsigned(siz); 1106 m1->m_len -= NFSX_UNSIGNED; 1107 tlen = NFSX_UNSIGNED; 1108 putsize = 0; 1109 } 1110 if (siz < m1->m_len) { 1111 len = nfsm_rndup(siz); 1112 xfer = siz; 1113 if (xfer < len) 1114 *(tl+(xfer>>2)) = 0; 1115 } else { 1116 xfer = len = m1->m_len; 1117 } 1118 bcopy(cp, (caddr_t) tl, xfer); 1119 m1->m_len = len+tlen; 1120 siz -= xfer; 1121 cp += xfer; 1122 } 1123 *mb = m1; 1124 *bpos = mtod(m1, caddr_t)+m1->m_len; 1125 return (0); 1126 } 1127 1128 /* 1129 * Directory caching routines. They work as follows: 1130 * - a cache is maintained per VDIR nfsnode. 1131 * - for each offset cookie that is exported to userspace, and can 1132 * thus be thrown back at us as an offset to VOP_READDIR, store 1133 * information in the cache. 1134 * - cached are: 1135 * - cookie itself 1136 * - blocknumber (essentially just a search key in the buffer cache) 1137 * - entry number in block. 1138 * - offset cookie of block in which this entry is stored 1139 * - 32 bit cookie if NFSMNT_XLATECOOKIE is used. 1140 * - entries are looked up in a hash table 1141 * - also maintained is an LRU list of entries, used to determine 1142 * which ones to delete if the cache grows too large. 1143 * - if 32 <-> 64 translation mode is requested for a filesystem, 1144 * the cache also functions as a translation table 1145 * - in the translation case, invalidating the cache does not mean 1146 * flushing it, but just marking entries as invalid, except for 1147 * the <64bit cookie, 32bitcookie> pair which is still valid, to 1148 * still be able to use the cache as a translation table. 1149 * - 32 bit cookies are uniquely created by combining the hash table 1150 * entry value, and one generation count per hash table entry, 1151 * incremented each time an entry is appended to the chain. 1152 * - the cache is invalidated each time a direcory is modified 1153 * - sanity checks are also done; if an entry in a block turns 1154 * out not to have a matching cookie, the cache is invalidated 1155 * and a new block starting from the wanted offset is fetched from 1156 * the server. 1157 * - directory entries as read from the server are extended to contain 1158 * the 64bit and, optionally, the 32bit cookies, for sanity checking 1159 * the cache and exporting them to userspace through the cookie 1160 * argument to VOP_READDIR. 1161 */ 1162 1163 u_long 1164 nfs_dirhash(off) 1165 off_t off; 1166 { 1167 int i; 1168 char *cp = (char *)&off; 1169 u_long sum = 0L; 1170 1171 for (i = 0 ; i < sizeof (off); i++) 1172 sum += *cp++; 1173 1174 return sum; 1175 } 1176 1177 void 1178 nfs_initdircache(vp) 1179 struct vnode *vp; 1180 { 1181 struct nfsnode *np = VTONFS(vp); 1182 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1183 1184 np->n_dircachesize = 0; 1185 np->n_dblkno = 1; 1186 np->n_dircache = 1187 hashinit(NFS_DIRHASHSIZ, M_NFSDIROFF, M_WAITOK, &nfsdirhashmask); 1188 TAILQ_INIT(&np->n_dirchain); 1189 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) { 1190 MALLOC(np->n_dirgens, unsigned *, 1191 NFS_DIRHASHSIZ * sizeof (unsigned), M_NFSDIROFF, 1192 M_WAITOK); 1193 bzero((caddr_t)np->n_dirgens, 1194 NFS_DIRHASHSIZ * sizeof (unsigned)); 1195 } 1196 } 1197 1198 static struct nfsdircache dzero = {0, 0, {0, 0}, {0, 0}, 0, 0, 0}; 1199 1200 struct nfsdircache * 1201 nfs_searchdircache(vp, off, do32, hashent) 1202 struct vnode *vp; 1203 off_t off; 1204 int do32; 1205 int *hashent; 1206 { 1207 struct nfsdirhashhead *ndhp; 1208 struct nfsdircache *ndp = NULL; 1209 struct nfsnode *np = VTONFS(vp); 1210 unsigned ent; 1211 1212 /* 1213 * Zero is always a valid cookie. 1214 */ 1215 if (off == 0) 1216 return &dzero; 1217 1218 /* 1219 * We use a 32bit cookie as search key, directly reconstruct 1220 * the hashentry. Else use the hashfunction. 1221 */ 1222 if (do32) { 1223 ent = (u_int32_t)off >> 24; 1224 if (ent >= NFS_DIRHASHSIZ) 1225 return NULL; 1226 ndhp = &np->n_dircache[ent]; 1227 } else { 1228 ndhp = NFSDIRHASH(np, off); 1229 } 1230 1231 if (hashent) 1232 *hashent = (int)(ndhp - np->n_dircache); 1233 if (do32) { 1234 for (ndp = ndhp->lh_first; ndp; ndp = ndp->dc_hash.le_next) { 1235 if (ndp->dc_cookie32 == (u_int32_t)off) { 1236 /* 1237 * An invalidated entry will become the 1238 * start of a new block fetched from 1239 * the server. 1240 */ 1241 if (ndp->dc_blkno == -1) { 1242 ndp->dc_blkcookie = ndp->dc_cookie; 1243 ndp->dc_blkno = np->n_dblkno++; 1244 ndp->dc_entry = 0; 1245 } 1246 break; 1247 } 1248 } 1249 } else { 1250 for (ndp = ndhp->lh_first; ndp; ndp = ndp->dc_hash.le_next) 1251 if (ndp->dc_cookie == off) 1252 break; 1253 } 1254 return ndp; 1255 } 1256 1257 1258 struct nfsdircache * 1259 nfs_enterdircache(vp, off, blkoff, en, blkno) 1260 struct vnode *vp; 1261 off_t off, blkoff; 1262 daddr_t blkno; 1263 int en; 1264 { 1265 struct nfsnode *np = VTONFS(vp); 1266 struct nfsdirhashhead *ndhp; 1267 struct nfsdircache *ndp = NULL, *first; 1268 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1269 int hashent, gen, overwrite; 1270 1271 if (!np->n_dircache) 1272 /* 1273 * XXX would like to do this in nfs_nget but vtype 1274 * isn't known at that time. 1275 */ 1276 nfs_initdircache(vp); 1277 1278 /* 1279 * XXX refuse entries for offset 0. amd(8) erroneously sets 1280 * cookie 0 for the '.' entry, making this necessary. This 1281 * isn't so bad, as 0 is a special case anyway. 1282 */ 1283 if (off == 0) 1284 return &dzero; 1285 1286 ndp = nfs_searchdircache(vp, off, 0, &hashent); 1287 1288 if (ndp && ndp->dc_blkno != -1) { 1289 /* 1290 * Overwriting an old entry. Check if it's the same. 1291 * If so, just return. If not, remove the old entry. 1292 */ 1293 if (ndp->dc_blkcookie == blkoff && ndp->dc_entry == en) 1294 return ndp; 1295 TAILQ_REMOVE(&np->n_dirchain, ndp, dc_chain); 1296 LIST_REMOVE(ndp, dc_hash); 1297 FREE(ndp, M_NFSDIROFF); 1298 ndp = 0; 1299 } 1300 1301 ndhp = &np->n_dircache[hashent]; 1302 1303 if (!ndp) { 1304 MALLOC(ndp, struct nfsdircache *, sizeof (*ndp), M_NFSDIROFF, 1305 M_WAITOK); 1306 overwrite = 0; 1307 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) { 1308 /* 1309 * We're allocating a new entry, so bump the 1310 * generation number. 1311 */ 1312 gen = ++np->n_dirgens[hashent]; 1313 if (gen == 0) { 1314 np->n_dirgens[hashent]++; 1315 gen++; 1316 } 1317 ndp->dc_cookie32 = (hashent << 24) | (gen & 0xffffff); 1318 } 1319 } else 1320 overwrite = 1; 1321 1322 /* 1323 * If the entry number is 0, we are at the start of a new block, so 1324 * allocate a new blocknumber. 1325 */ 1326 if (en == 0) 1327 ndp->dc_blkno = np->n_dblkno++; 1328 else 1329 ndp->dc_blkno = blkno; 1330 1331 ndp->dc_cookie = off; 1332 ndp->dc_blkcookie = blkoff; 1333 ndp->dc_entry = en; 1334 1335 if (overwrite) 1336 return ndp; 1337 1338 /* 1339 * If the maximum directory cookie cache size has been reached 1340 * for this node, take one off the front. The idea is that 1341 * directories are typically read front-to-back once, so that 1342 * the oldest entries can be thrown away without much performance 1343 * loss. 1344 */ 1345 if (np->n_dircachesize == NFS_MAXDIRCACHE) { 1346 first = np->n_dirchain.tqh_first; 1347 TAILQ_REMOVE(&np->n_dirchain, first, dc_chain); 1348 LIST_REMOVE(first, dc_hash); 1349 FREE(first, M_NFSDIROFF); 1350 } else 1351 np->n_dircachesize++; 1352 1353 LIST_INSERT_HEAD(ndhp, ndp, dc_hash); 1354 TAILQ_INSERT_TAIL(&np->n_dirchain, ndp, dc_chain); 1355 return ndp; 1356 } 1357 1358 void 1359 nfs_invaldircache(vp, forcefree) 1360 struct vnode *vp; 1361 int forcefree; 1362 { 1363 struct nfsnode *np = VTONFS(vp); 1364 struct nfsdircache *ndp = NULL; 1365 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1366 1367 #ifdef DIAGNOSTIC 1368 if (vp->v_type != VDIR) 1369 panic("nfs: invaldircache: not dir"); 1370 #endif 1371 1372 if (!np->n_dircache) 1373 return; 1374 1375 if (!(nmp->nm_flag & NFSMNT_XLATECOOKIE) || forcefree) { 1376 while ((ndp = np->n_dirchain.tqh_first)) { 1377 TAILQ_REMOVE(&np->n_dirchain, ndp, dc_chain); 1378 LIST_REMOVE(ndp, dc_hash); 1379 FREE(ndp, M_NFSDIROFF); 1380 } 1381 np->n_dircachesize = 0; 1382 if (forcefree && np->n_dirgens) { 1383 FREE(np->n_dirgens, M_NFSDIROFF); 1384 } 1385 } else { 1386 for (ndp = np->n_dirchain.tqh_first; ndp; 1387 ndp = ndp->dc_chain.tqe_next) 1388 ndp->dc_blkno = -1; 1389 } 1390 1391 np->n_dblkno = 1; 1392 } 1393 1394 /* 1395 * Called once before VFS init to initialize shared and 1396 * server-specific data structures. 1397 */ 1398 void 1399 nfs_init() 1400 { 1401 1402 #if !defined(alpha) && defined(DIAGNOSTIC) 1403 /* 1404 * Check to see if major data structures haven't bloated. 1405 */ 1406 if (sizeof (struct nfsnode) > NFS_NODEALLOC) { 1407 printf("struct nfsnode bloated (> %dbytes)\n", NFS_NODEALLOC); 1408 printf("Try reducing NFS_SMALLFH\n"); 1409 } 1410 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1411 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1412 printf("Try reducing NFS_UIDHASHSIZ\n"); 1413 } 1414 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1415 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1416 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1417 } 1418 #endif 1419 1420 nfsrtt.pos = 0; 1421 rpc_vers = txdr_unsigned(RPC_VER2); 1422 rpc_call = txdr_unsigned(RPC_CALL); 1423 rpc_reply = txdr_unsigned(RPC_REPLY); 1424 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1425 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1426 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1427 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1428 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1429 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1430 nfs_prog = txdr_unsigned(NFS_PROG); 1431 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1432 nfs_true = txdr_unsigned(TRUE); 1433 nfs_false = txdr_unsigned(FALSE); 1434 nfs_xdrneg1 = txdr_unsigned(-1); 1435 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1436 if (nfs_ticks < 1) 1437 nfs_ticks = 1; 1438 #ifdef NFSSERVER 1439 nfsrv_init(0); /* Init server data structures */ 1440 nfsrv_initcache(); /* Init the server request cache */ 1441 #endif /* NFSSERVER */ 1442 1443 /* 1444 * Initialize the nqnfs data structures. 1445 */ 1446 if (nqnfsstarttime == 0) { 1447 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1448 + nqsrv_clockskew + nqsrv_writeslack; 1449 NQLOADNOVRAM(nqnfsstarttime); 1450 CIRCLEQ_INIT(&nqtimerhead); 1451 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, M_WAITOK, &nqfhhash); 1452 } 1453 1454 /* 1455 * Initialize reply list and start timer 1456 */ 1457 TAILQ_INIT(&nfs_reqq); 1458 nfs_timer(NULL); 1459 } 1460 1461 #ifdef NFS 1462 /* 1463 * Called once at VFS init to initialize client-specific data structures. 1464 */ 1465 void 1466 nfs_vfs_init() 1467 { 1468 register int i; 1469 1470 /* Ensure async daemons disabled */ 1471 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1472 nfs_iodwant[i] = (struct proc *)0; 1473 nfs_iodmount[i] = (struct nfsmount *)0; 1474 } 1475 nfs_nhinit(); /* Init the nfsnode table */ 1476 } 1477 1478 /* 1479 * Attribute cache routines. 1480 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1481 * that are on the mbuf list 1482 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1483 * error otherwise 1484 */ 1485 1486 /* 1487 * Load the attribute cache (that lives in the nfsnode entry) with 1488 * the values on the mbuf list and 1489 * Iff vap not NULL 1490 * copy the attributes to *vaper 1491 */ 1492 int 1493 nfsm_loadattrcache(vpp, mdp, dposp, vaper) 1494 struct vnode **vpp; 1495 struct mbuf **mdp; 1496 caddr_t *dposp; 1497 struct vattr *vaper; 1498 { 1499 register int32_t t1; 1500 caddr_t cp2; 1501 int error = 0; 1502 struct mbuf *md; 1503 int v3 = NFS_ISV3(*vpp); 1504 1505 md = *mdp; 1506 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1507 error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2); 1508 if (error) 1509 return (error); 1510 return nfs_loadattrcache(vpp, (struct nfs_fattr *)cp2, vaper); 1511 } 1512 1513 int 1514 nfs_loadattrcache(vpp, fp, vaper) 1515 struct vnode **vpp; 1516 struct nfs_fattr *fp; 1517 struct vattr *vaper; 1518 { 1519 register struct vnode *vp = *vpp; 1520 register struct vattr *vap; 1521 int v3 = NFS_ISV3(vp); 1522 enum vtype vtyp; 1523 u_short vmode; 1524 struct timespec mtime; 1525 struct vnode *nvp; 1526 int32_t rdev; 1527 register struct nfsnode *np; 1528 extern int (**spec_nfsv2nodeop_p) __P((void *)); 1529 1530 if (v3) { 1531 vtyp = nfsv3tov_type(fp->fa_type); 1532 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1533 rdev = makedev(fxdr_unsigned(u_char, fp->fa3_rdev.specdata1), 1534 fxdr_unsigned(u_char, fp->fa3_rdev.specdata2)); 1535 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1536 } else { 1537 vtyp = nfsv2tov_type(fp->fa_type); 1538 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1539 if (vtyp == VNON || vtyp == VREG) 1540 vtyp = IFTOVT(vmode); 1541 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1542 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1543 1544 /* 1545 * Really ugly NFSv2 kludge. 1546 */ 1547 if (vtyp == VCHR && rdev == 0xffffffff) 1548 vtyp = VFIFO; 1549 } 1550 1551 /* 1552 * If v_type == VNON it is a new node, so fill in the v_type, 1553 * n_mtime fields. Check to see if it represents a special 1554 * device, and if so, check for a possible alias. Once the 1555 * correct vnode has been obtained, fill in the rest of the 1556 * information. 1557 */ 1558 np = VTONFS(vp); 1559 if (vp->v_type != vtyp) { 1560 vp->v_type = vtyp; 1561 if (vp->v_type == VFIFO) { 1562 #ifndef FIFO 1563 return (EOPNOTSUPP); 1564 #else 1565 extern int (**fifo_nfsv2nodeop_p) __P((void *)); 1566 vp->v_op = fifo_nfsv2nodeop_p; 1567 #endif /* FIFO */ 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 #ifdef Lite2_integrated 1579 nvp->v_vnlock = vp->v_vnlock; 1580 vp->v_vnlock = NULL; 1581 #endif 1582 nvp->v_data = vp->v_data; 1583 vp->v_data = NULL; 1584 vp->v_op = spec_vnodeop_p; 1585 vrele(vp); 1586 vgone(vp); 1587 /* 1588 * Reinitialize aliased node. 1589 */ 1590 np->n_vnode = nvp; 1591 *vpp = vp = nvp; 1592 } 1593 } 1594 np->n_mtime = mtime.tv_sec; 1595 } 1596 vap = np->n_vattr; 1597 vap->va_type = vtyp; 1598 vap->va_mode = vmode & ALLPERMS; 1599 vap->va_rdev = (dev_t)rdev; 1600 vap->va_mtime = mtime; 1601 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1602 if (v3) { 1603 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1604 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1605 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1606 fxdr_hyper(&fp->fa3_size, &vap->va_size); 1607 if (vtyp == VDIR) 1608 vap->va_blocksize = NFS_DIRFRAGSIZ; 1609 else 1610 vap->va_blocksize = NFS_FABLKSIZE; 1611 fxdr_hyper(&fp->fa3_used, &vap->va_bytes); 1612 vap->va_fileid = fxdr_unsigned(int32_t, 1613 fp->fa3_fileid.nfsuquad[1]); 1614 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1615 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1616 vap->va_flags = 0; 1617 vap->va_filerev = 0; 1618 } else { 1619 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1620 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1621 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1622 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1623 if (vtyp == VDIR) 1624 vap->va_blocksize = NFS_DIRFRAGSIZ; 1625 else 1626 vap->va_blocksize = 1627 fxdr_unsigned(int32_t, fp->fa2_blocksize); 1628 vap->va_bytes = fxdr_unsigned(int32_t, fp->fa2_blocks) 1629 * NFS_FABLKSIZE; 1630 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1631 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1632 vap->va_flags = 0; 1633 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1634 fp->fa2_ctime.nfsv2_sec); 1635 vap->va_ctime.tv_nsec = 0; 1636 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1637 vap->va_filerev = 0; 1638 } 1639 if (vap->va_size != np->n_size) { 1640 if (vap->va_type == VREG) { 1641 if (np->n_flag & NMODIFIED) { 1642 if (vap->va_size < np->n_size) 1643 vap->va_size = np->n_size; 1644 else 1645 np->n_size = vap->va_size; 1646 } else 1647 np->n_size = vap->va_size; 1648 #if defined(UVM) 1649 uvm_vnp_setsize(vp, np->n_size); 1650 #else 1651 vnode_pager_setsize(vp, np->n_size); 1652 #endif 1653 } else 1654 np->n_size = vap->va_size; 1655 } 1656 np->n_attrstamp = time.tv_sec; 1657 if (vaper != NULL) { 1658 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1659 if (np->n_flag & NCHG) { 1660 if (np->n_flag & NACC) 1661 vaper->va_atime = np->n_atim; 1662 if (np->n_flag & NUPD) 1663 vaper->va_mtime = np->n_mtim; 1664 } 1665 } 1666 return (0); 1667 } 1668 1669 /* 1670 * Check the time stamp 1671 * If the cache is valid, copy contents to *vap and return 0 1672 * otherwise return an error 1673 */ 1674 int 1675 nfs_getattrcache(vp, vaper) 1676 register struct vnode *vp; 1677 struct vattr *vaper; 1678 { 1679 register struct nfsnode *np = VTONFS(vp); 1680 register struct vattr *vap; 1681 1682 if ((time.tv_sec - np->n_attrstamp) >= NFS_ATTRTIMEO(np)) { 1683 nfsstats.attrcache_misses++; 1684 return (ENOENT); 1685 } 1686 nfsstats.attrcache_hits++; 1687 vap = np->n_vattr; 1688 if (vap->va_size != np->n_size) { 1689 if (vap->va_type == VREG) { 1690 if (np->n_flag & NMODIFIED) { 1691 if (vap->va_size < np->n_size) 1692 vap->va_size = np->n_size; 1693 else 1694 np->n_size = vap->va_size; 1695 } else 1696 np->n_size = vap->va_size; 1697 #if defined(UVM) 1698 uvm_vnp_setsize(vp, np->n_size); 1699 #else 1700 vnode_pager_setsize(vp, np->n_size); 1701 #endif 1702 } else 1703 np->n_size = vap->va_size; 1704 } 1705 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1706 if (np->n_flag & NCHG) { 1707 if (np->n_flag & NACC) 1708 vaper->va_atime = np->n_atim; 1709 if (np->n_flag & NUPD) 1710 vaper->va_mtime = np->n_mtim; 1711 } 1712 return (0); 1713 } 1714 1715 /* 1716 * Heuristic to see if the server XDR encodes directory cookies or not. 1717 * it is not supposed to, but a lot of servers may do this. Also, since 1718 * most/all servers will implement V2 as well, it is expected that they 1719 * may return just 32 bits worth of cookie information, so we need to 1720 * find out in which 32 bits this information is available. We do this 1721 * to avoid trouble with emulated binaries that can't handle 64 bit 1722 * directory offsets. 1723 */ 1724 1725 void 1726 nfs_cookieheuristic(vp, flagp, p, cred) 1727 struct vnode *vp; 1728 int *flagp; 1729 struct proc *p; 1730 struct ucred *cred; 1731 { 1732 struct uio auio; 1733 struct iovec aiov; 1734 caddr_t buf, cp; 1735 struct dirent *dp; 1736 off_t *cookies, *cop; 1737 int error, eof, nc, len; 1738 1739 nc = NFS_DIRFRAGSIZ / 16; 1740 MALLOC(buf, caddr_t, NFS_DIRFRAGSIZ, M_TEMP, M_WAITOK); 1741 MALLOC(cookies, off_t *, nc * sizeof (off_t), M_TEMP, M_WAITOK); 1742 1743 aiov.iov_base = buf; 1744 aiov.iov_len = NFS_DIRFRAGSIZ; 1745 auio.uio_iov = &aiov; 1746 auio.uio_iovcnt = 1; 1747 auio.uio_rw = UIO_READ; 1748 auio.uio_segflg = UIO_SYSSPACE; 1749 auio.uio_procp = p; 1750 auio.uio_resid = NFS_DIRFRAGSIZ; 1751 auio.uio_offset = 0; 1752 1753 error = VOP_READDIR(vp, &auio, cred, &eof, cookies, nc); 1754 1755 len = NFS_DIRFRAGSIZ - auio.uio_resid; 1756 if (error || len == 0) { 1757 FREE(buf, M_TEMP); 1758 FREE(cookies, M_TEMP); 1759 return; 1760 } 1761 1762 /* 1763 * Find the first valid entry and look at its offset cookie. 1764 */ 1765 1766 cp = buf; 1767 for (cop = cookies; len > 0; len -= dp->d_reclen) { 1768 dp = (struct dirent *)cp; 1769 if (dp->d_fileno != 0 && len >= dp->d_reclen) { 1770 if ((*cop >> 32) != 0 && (*cop & 0xffffffffLL) == 0) { 1771 *flagp |= NFSMNT_SWAPCOOKIE; 1772 nfs_invaldircache(vp, 0); 1773 nfs_vinvalbuf(vp, 0, cred, p, 1); 1774 } 1775 break; 1776 } 1777 cop++; 1778 cp += dp->d_reclen; 1779 } 1780 1781 FREE(buf, M_TEMP); 1782 FREE(cookies, M_TEMP); 1783 } 1784 #endif /* NFS */ 1785 1786 /* 1787 * Set up nameidata for a lookup() call and do it. 1788 * 1789 * If pubflag is set, this call is done for a lookup operation on the 1790 * public filehandle. In that case we allow crossing mountpoints and 1791 * absolute pathnames. However, the caller is expected to check that 1792 * the lookup result is within the public fs, and deny access if 1793 * it is not. 1794 */ 1795 int 1796 nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1797 register struct nameidata *ndp; 1798 fhandle_t *fhp; 1799 int len; 1800 struct nfssvc_sock *slp; 1801 struct mbuf *nam; 1802 struct mbuf **mdp; 1803 caddr_t *dposp; 1804 struct vnode **retdirp; 1805 struct proc *p; 1806 int kerbflag, pubflag; 1807 { 1808 register int i, rem; 1809 register struct mbuf *md; 1810 register char *fromcp, *tocp, *cp; 1811 struct iovec aiov; 1812 struct uio auio; 1813 struct vnode *dp; 1814 int error, rdonly, linklen; 1815 struct componentname *cnp = &ndp->ni_cnd; 1816 1817 *retdirp = (struct vnode *)0; 1818 MALLOC(cnp->cn_pnbuf, char *, len + 1, M_NAMEI, M_WAITOK); 1819 /* 1820 * Copy the name from the mbuf list to ndp->ni_pnbuf 1821 * and set the various ndp fields appropriately. 1822 */ 1823 fromcp = *dposp; 1824 tocp = cnp->cn_pnbuf; 1825 md = *mdp; 1826 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1827 for (i = 0; i < len; i++) { 1828 while (rem == 0) { 1829 md = md->m_next; 1830 if (md == NULL) { 1831 error = EBADRPC; 1832 goto out; 1833 } 1834 fromcp = mtod(md, caddr_t); 1835 rem = md->m_len; 1836 } 1837 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1838 error = EACCES; 1839 goto out; 1840 } 1841 *tocp++ = *fromcp++; 1842 rem--; 1843 } 1844 *tocp = '\0'; 1845 *mdp = md; 1846 *dposp = fromcp; 1847 len = nfsm_rndup(len)-len; 1848 if (len > 0) { 1849 if (rem >= len) 1850 *dposp += len; 1851 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1852 goto out; 1853 } 1854 1855 /* 1856 * Extract and set starting directory. 1857 */ 1858 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1859 nam, &rdonly, kerbflag, pubflag); 1860 if (error) 1861 goto out; 1862 if (dp->v_type != VDIR) { 1863 vrele(dp); 1864 error = ENOTDIR; 1865 goto out; 1866 } 1867 1868 if (rdonly) 1869 cnp->cn_flags |= RDONLY; 1870 1871 *retdirp = dp; 1872 1873 if (pubflag) { 1874 /* 1875 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1876 * and the 'native path' indicator. 1877 */ 1878 MALLOC(cp, char *, MAXPATHLEN, M_NAMEI, M_WAITOK); 1879 fromcp = cnp->cn_pnbuf; 1880 tocp = cp; 1881 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1882 switch ((unsigned char)*fromcp) { 1883 case WEBNFS_NATIVE_CHAR: 1884 /* 1885 * 'Native' path for us is the same 1886 * as a path according to the NFS spec, 1887 * just skip the escape char. 1888 */ 1889 fromcp++; 1890 break; 1891 /* 1892 * More may be added in the future, range 0x80-0xff 1893 */ 1894 default: 1895 error = EIO; 1896 FREE(cp, M_NAMEI); 1897 goto out; 1898 } 1899 } 1900 /* 1901 * Translate the '%' escapes, URL-style. 1902 */ 1903 while (*fromcp != '\0') { 1904 if (*fromcp == WEBNFS_ESC_CHAR) { 1905 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1906 fromcp++; 1907 *tocp++ = HEXSTRTOI(fromcp); 1908 fromcp += 2; 1909 continue; 1910 } else { 1911 error = ENOENT; 1912 FREE(cp, M_NAMEI); 1913 goto out; 1914 } 1915 } else 1916 *tocp++ = *fromcp++; 1917 } 1918 *tocp = '\0'; 1919 FREE(cnp->cn_pnbuf, M_NAMEI); 1920 cnp->cn_pnbuf = cp; 1921 } 1922 1923 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1924 ndp->ni_segflg = UIO_SYSSPACE; 1925 1926 if (pubflag) { 1927 ndp->ni_rootdir = rootvnode; 1928 ndp->ni_loopcnt = 0; 1929 if (cnp->cn_pnbuf[0] == '/') 1930 dp = rootvnode; 1931 } else { 1932 cnp->cn_flags |= NOCROSSMOUNT; 1933 } 1934 1935 cnp->cn_proc = p; 1936 VREF(dp); 1937 1938 for (;;) { 1939 cnp->cn_nameptr = cnp->cn_pnbuf; 1940 ndp->ni_startdir = dp; 1941 /* 1942 * And call lookup() to do the real work 1943 */ 1944 error = lookup(ndp); 1945 if (error) 1946 break; 1947 /* 1948 * Check for encountering a symbolic link 1949 */ 1950 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1951 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1952 cnp->cn_flags |= HASBUF; 1953 return (0); 1954 } 1955 break; 1956 } else { 1957 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1958 VOP_UNLOCK(ndp->ni_dvp); 1959 if (!pubflag) { 1960 vrele(ndp->ni_dvp); 1961 vput(ndp->ni_vp); 1962 ndp->ni_vp = NULL; 1963 error = EINVAL; 1964 break; 1965 } 1966 1967 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1968 error = ELOOP; 1969 break; 1970 } 1971 if (ndp->ni_pathlen > 1) 1972 MALLOC(cp, char *, MAXPATHLEN, M_NAMEI, M_WAITOK); 1973 else 1974 cp = cnp->cn_pnbuf; 1975 aiov.iov_base = cp; 1976 aiov.iov_len = MAXPATHLEN; 1977 auio.uio_iov = &aiov; 1978 auio.uio_iovcnt = 1; 1979 auio.uio_offset = 0; 1980 auio.uio_rw = UIO_READ; 1981 auio.uio_segflg = UIO_SYSSPACE; 1982 auio.uio_procp = (struct proc *)0; 1983 auio.uio_resid = MAXPATHLEN; 1984 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1985 if (error) { 1986 badlink: 1987 if (ndp->ni_pathlen > 1) 1988 FREE(cp, M_NAMEI); 1989 break; 1990 } 1991 linklen = MAXPATHLEN - auio.uio_resid; 1992 if (linklen == 0) { 1993 error = ENOENT; 1994 goto badlink; 1995 } 1996 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1997 error = ENAMETOOLONG; 1998 goto badlink; 1999 } 2000 if (ndp->ni_pathlen > 1) { 2001 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 2002 FREE(cnp->cn_pnbuf, M_NAMEI); 2003 cnp->cn_pnbuf = cp; 2004 } else 2005 cnp->cn_pnbuf[linklen] = '\0'; 2006 ndp->ni_pathlen += linklen; 2007 vput(ndp->ni_vp); 2008 dp = ndp->ni_dvp; 2009 /* 2010 * Check if root directory should replace current directory. 2011 */ 2012 if (cnp->cn_pnbuf[0] == '/') { 2013 vrele(dp); 2014 dp = ndp->ni_rootdir; 2015 VREF(dp); 2016 } 2017 } 2018 } 2019 out: 2020 FREE(cnp->cn_pnbuf, M_NAMEI); 2021 return (error); 2022 } 2023 2024 /* 2025 * A fiddled version of m_adj() that ensures null fill to a long 2026 * boundary and only trims off the back end 2027 */ 2028 void 2029 nfsm_adj(mp, len, nul) 2030 struct mbuf *mp; 2031 register int len; 2032 int nul; 2033 { 2034 register struct mbuf *m; 2035 register int count, i; 2036 register char *cp; 2037 2038 /* 2039 * Trim from tail. Scan the mbuf chain, 2040 * calculating its length and finding the last mbuf. 2041 * If the adjustment only affects this mbuf, then just 2042 * adjust and return. Otherwise, rescan and truncate 2043 * after the remaining size. 2044 */ 2045 count = 0; 2046 m = mp; 2047 for (;;) { 2048 count += m->m_len; 2049 if (m->m_next == (struct mbuf *)0) 2050 break; 2051 m = m->m_next; 2052 } 2053 if (m->m_len > len) { 2054 m->m_len -= len; 2055 if (nul > 0) { 2056 cp = mtod(m, caddr_t)+m->m_len-nul; 2057 for (i = 0; i < nul; i++) 2058 *cp++ = '\0'; 2059 } 2060 return; 2061 } 2062 count -= len; 2063 if (count < 0) 2064 count = 0; 2065 /* 2066 * Correct length for chain is "count". 2067 * Find the mbuf with last data, adjust its length, 2068 * and toss data from remaining mbufs on chain. 2069 */ 2070 for (m = mp; m; m = m->m_next) { 2071 if (m->m_len >= count) { 2072 m->m_len = count; 2073 if (nul > 0) { 2074 cp = mtod(m, caddr_t)+m->m_len-nul; 2075 for (i = 0; i < nul; i++) 2076 *cp++ = '\0'; 2077 } 2078 break; 2079 } 2080 count -= m->m_len; 2081 } 2082 for (m = m->m_next;m;m = m->m_next) 2083 m->m_len = 0; 2084 } 2085 2086 /* 2087 * Make these functions instead of macros, so that the kernel text size 2088 * doesn't get too big... 2089 */ 2090 void 2091 nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 2092 struct nfsrv_descript *nfsd; 2093 int before_ret; 2094 register struct vattr *before_vap; 2095 int after_ret; 2096 struct vattr *after_vap; 2097 struct mbuf **mbp; 2098 char **bposp; 2099 { 2100 register struct mbuf *mb = *mbp, *mb2; 2101 register char *bpos = *bposp; 2102 register u_int32_t *tl; 2103 2104 if (before_ret) { 2105 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 2106 *tl = nfs_false; 2107 } else { 2108 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 2109 *tl++ = nfs_true; 2110 txdr_hyper(&(before_vap->va_size), tl); 2111 tl += 2; 2112 txdr_nfsv3time(&(before_vap->va_mtime), tl); 2113 tl += 2; 2114 txdr_nfsv3time(&(before_vap->va_ctime), tl); 2115 } 2116 *bposp = bpos; 2117 *mbp = mb; 2118 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 2119 } 2120 2121 void 2122 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 2123 struct nfsrv_descript *nfsd; 2124 int after_ret; 2125 struct vattr *after_vap; 2126 struct mbuf **mbp; 2127 char **bposp; 2128 { 2129 register struct mbuf *mb = *mbp, *mb2; 2130 register char *bpos = *bposp; 2131 register u_int32_t *tl; 2132 register struct nfs_fattr *fp; 2133 2134 if (after_ret) { 2135 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 2136 *tl = nfs_false; 2137 } else { 2138 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 2139 *tl++ = nfs_true; 2140 fp = (struct nfs_fattr *)tl; 2141 nfsm_srvfattr(nfsd, after_vap, fp); 2142 } 2143 *mbp = mb; 2144 *bposp = bpos; 2145 } 2146 2147 void 2148 nfsm_srvfattr(nfsd, vap, fp) 2149 register struct nfsrv_descript *nfsd; 2150 register struct vattr *vap; 2151 register struct nfs_fattr *fp; 2152 { 2153 2154 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 2155 fp->fa_uid = txdr_unsigned(vap->va_uid); 2156 fp->fa_gid = txdr_unsigned(vap->va_gid); 2157 if (nfsd->nd_flag & ND_NFSV3) { 2158 fp->fa_type = vtonfsv3_type(vap->va_type); 2159 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 2160 txdr_hyper(&vap->va_size, &fp->fa3_size); 2161 txdr_hyper(&vap->va_bytes, &fp->fa3_used); 2162 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 2163 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 2164 fp->fa3_fsid.nfsuquad[0] = 0; 2165 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 2166 fp->fa3_fileid.nfsuquad[0] = 0; 2167 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 2168 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 2169 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 2170 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 2171 } else { 2172 fp->fa_type = vtonfsv2_type(vap->va_type); 2173 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 2174 fp->fa2_size = txdr_unsigned(vap->va_size); 2175 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 2176 if (vap->va_type == VFIFO) 2177 fp->fa2_rdev = 0xffffffff; 2178 else 2179 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 2180 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 2181 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 2182 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 2183 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 2184 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 2185 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 2186 } 2187 } 2188 2189 /* 2190 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 2191 * - look up fsid in mount list (if not found ret error) 2192 * - get vp and export rights by calling VFS_FHTOVP() 2193 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2194 * - if not lockflag unlock it with VOP_UNLOCK() 2195 */ 2196 int 2197 nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 2198 fhandle_t *fhp; 2199 int lockflag; 2200 struct vnode **vpp; 2201 struct ucred *cred; 2202 struct nfssvc_sock *slp; 2203 struct mbuf *nam; 2204 int *rdonlyp; 2205 int kerbflag; 2206 { 2207 #ifdef Lite2_integrated 2208 struct proc *p = curproc; /* XXX */ 2209 #endif 2210 register struct mount *mp; 2211 register int i; 2212 struct ucred *credanon; 2213 int error, exflags; 2214 struct sockaddr_in *saddr; 2215 2216 *vpp = (struct vnode *)0; 2217 2218 if (nfs_ispublicfh(fhp)) { 2219 if (!pubflag || !nfs_pub.np_valid) 2220 return (ESTALE); 2221 fhp = &nfs_pub.np_handle; 2222 } 2223 2224 #ifdef Lite2_integrated 2225 mp = vfs_getvfs(&fhp->fh_fsid); 2226 #else 2227 mp = getvfs(&fhp->fh_fsid); 2228 #endif 2229 if (!mp) 2230 return (ESTALE); 2231 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon); 2232 if (error) 2233 return (error); 2234 2235 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 2236 saddr = mtod(nam, struct sockaddr_in *); 2237 if (saddr->sin_family == AF_INET && 2238 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 2239 vput(*vpp); 2240 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2241 } 2242 } 2243 /* 2244 * Check/setup credentials. 2245 */ 2246 if (exflags & MNT_EXKERB) { 2247 if (!kerbflag) { 2248 vput(*vpp); 2249 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2250 } 2251 } else if (kerbflag) { 2252 vput(*vpp); 2253 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2254 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 2255 cred->cr_uid = credanon->cr_uid; 2256 cred->cr_gid = credanon->cr_gid; 2257 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 2258 cred->cr_groups[i] = credanon->cr_groups[i]; 2259 cred->cr_ngroups = i; 2260 } 2261 if (exflags & MNT_EXRDONLY) 2262 *rdonlyp = 1; 2263 else 2264 *rdonlyp = 0; 2265 if (!lockflag) 2266 #ifdef Lite2_integrated 2267 VOP_UNLOCK(*vpp, 0, p); 2268 #else 2269 VOP_UNLOCK(*vpp); 2270 #endif 2271 return (0); 2272 } 2273 2274 /* 2275 * WebNFS: check if a filehandle is a public filehandle. For v3, this 2276 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 2277 * transformed this to all zeroes in both cases, so check for it. 2278 */ 2279 int 2280 nfs_ispublicfh(fhp) 2281 fhandle_t *fhp; 2282 { 2283 char *cp = (char *)fhp; 2284 int i; 2285 2286 for (i = 0; i < NFSX_V3FH; i++) 2287 if (*cp++ != 0) 2288 return (FALSE); 2289 return (TRUE); 2290 } 2291 2292 /* 2293 * This function compares two net addresses by family and returns TRUE 2294 * if they are the same host. 2295 * If there is any doubt, return FALSE. 2296 * The AF_INET family is handled as a special case so that address mbufs 2297 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 2298 */ 2299 int 2300 netaddr_match(family, haddr, nam) 2301 int family; 2302 union nethostaddr *haddr; 2303 struct mbuf *nam; 2304 { 2305 register struct sockaddr_in *inetaddr; 2306 2307 switch (family) { 2308 case AF_INET: 2309 inetaddr = mtod(nam, struct sockaddr_in *); 2310 if (inetaddr->sin_family == AF_INET && 2311 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 2312 return (1); 2313 break; 2314 #ifdef ISO 2315 case AF_ISO: 2316 { 2317 register struct sockaddr_iso *isoaddr1, *isoaddr2; 2318 2319 isoaddr1 = mtod(nam, struct sockaddr_iso *); 2320 isoaddr2 = mtod(haddr->had_nam, struct sockaddr_iso *); 2321 if (isoaddr1->siso_family == AF_ISO && 2322 isoaddr1->siso_nlen > 0 && 2323 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 2324 SAME_ISOADDR(isoaddr1, isoaddr2)) 2325 return (1); 2326 break; 2327 } 2328 #endif /* ISO */ 2329 default: 2330 break; 2331 }; 2332 return (0); 2333 } 2334 2335 2336 /* 2337 * The write verifier has changed (probably due to a server reboot), so all 2338 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2339 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2340 * flag. Once done the new write verifier can be set for the mount point. 2341 */ 2342 void 2343 nfs_clearcommit(mp) 2344 struct mount *mp; 2345 { 2346 register struct vnode *vp, *nvp; 2347 register struct buf *bp, *nbp; 2348 int s; 2349 2350 s = splbio(); 2351 loop: 2352 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2353 if (vp->v_mount != mp) /* Paranoia */ 2354 goto loop; 2355 nvp = vp->v_mntvnodes.le_next; 2356 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2357 nbp = bp->b_vnbufs.le_next; 2358 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2359 == (B_DELWRI | B_NEEDCOMMIT)) 2360 bp->b_flags &= ~B_NEEDCOMMIT; 2361 } 2362 } 2363 splx(s); 2364 } 2365 2366 /* 2367 * Map errnos to NFS error numbers. For Version 3 also filter out error 2368 * numbers not specified for the associated procedure. 2369 */ 2370 int 2371 nfsrv_errmap(nd, err) 2372 struct nfsrv_descript *nd; 2373 register int err; 2374 { 2375 register short *defaulterrp, *errp; 2376 2377 if (nd->nd_flag & ND_NFSV3) { 2378 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2379 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2380 while (*++errp) { 2381 if (*errp == err) 2382 return (err); 2383 else if (*errp > err) 2384 break; 2385 } 2386 return ((int)*defaulterrp); 2387 } else 2388 return (err & 0xffff); 2389 } 2390 if (err <= ELAST) 2391 return ((int)nfsrv_v2errmap[err - 1]); 2392 return (NFSERR_IO); 2393 } 2394 2395 /* 2396 * Sort the group list in increasing numerical order. 2397 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 2398 * that used to be here.) 2399 */ 2400 void 2401 nfsrvw_sort(list, num) 2402 register gid_t *list; 2403 register int num; 2404 { 2405 register int i, j; 2406 gid_t v; 2407 2408 /* Insertion sort. */ 2409 for (i = 1; i < num; i++) { 2410 v = list[i]; 2411 /* find correct slot for value v, moving others up */ 2412 for (j = i; --j >= 0 && v < list[j];) 2413 list[j + 1] = list[j]; 2414 list[j + 1] = v; 2415 } 2416 } 2417 2418 /* 2419 * copy credentials making sure that the result can be compared with bcmp(). 2420 */ 2421 void 2422 nfsrv_setcred(incred, outcred) 2423 register struct ucred *incred, *outcred; 2424 { 2425 register int i; 2426 2427 bzero((caddr_t)outcred, sizeof (struct ucred)); 2428 outcred->cr_ref = 1; 2429 outcred->cr_uid = incred->cr_uid; 2430 outcred->cr_gid = incred->cr_gid; 2431 outcred->cr_ngroups = incred->cr_ngroups; 2432 for (i = 0; i < incred->cr_ngroups; i++) 2433 outcred->cr_groups[i] = incred->cr_groups[i]; 2434 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 2435 } 2436
Indexes created Thu Sep 25 02:09:54 GMT 2025