nfs_subs.c revision 1.55
1 /* $NetBSD: nfs_subs.c,v 1.55 1998/02/19 00:54:13 thorpej 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_uvm.h" 43 44 /* 45 * These functions support the macros and help fiddle mbuf chains for 46 * the nfs op functions. They do things like create the rpc header and 47 * copy data between mbuf chains and uio lists. 48 */ 49 #include <sys/param.h> 50 #include <sys/proc.h> 51 #include <sys/systm.h> 52 #include <sys/kernel.h> 53 #include <sys/mount.h> 54 #include <sys/vnode.h> 55 #include <sys/namei.h> 56 #include <sys/mbuf.h> 57 #include <sys/socket.h> 58 #include <sys/stat.h> 59 #include <sys/malloc.h> 60 #include <sys/time.h> 61 #include <sys/dirent.h> 62 63 #include <vm/vm.h> 64 65 #if defined(UVM) 66 #include <uvm/uvm_extern.h> 67 #endif 68 69 #include <nfs/rpcv2.h> 70 #include <nfs/nfsproto.h> 71 #include <nfs/nfsnode.h> 72 #include <nfs/nfs.h> 73 #include <nfs/xdr_subs.h> 74 #include <nfs/nfsm_subs.h> 75 #include <nfs/nfsmount.h> 76 #include <nfs/nqnfs.h> 77 #include <nfs/nfsrtt.h> 78 #include <nfs/nfs_var.h> 79 80 #include <miscfs/specfs/specdev.h> 81 82 #include <vm/vm.h> 83 84 #include <netinet/in.h> 85 #ifdef ISO 86 #include <netiso/iso.h> 87 #endif 88 89 /* 90 * Data items converted to xdr at startup, since they are constant 91 * This is kinda hokey, but may save a little time doing byte swaps 92 */ 93 u_int32_t nfs_xdrneg1; 94 u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 95 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 96 rpc_auth_kerb; 97 u_int32_t nfs_prog, nqnfs_prog, nfs_true, nfs_false; 98 99 /* And other global data */ 100 static u_int32_t nfs_xid = 0; 101 nfstype nfsv2_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON, 102 NFCHR, NFNON }; 103 nfstype nfsv3_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFSOCK, 104 NFFIFO, NFNON }; 105 enum vtype nv2tov_type[8] = { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON }; 106 enum vtype nv3tov_type[8]={ VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO }; 107 int nfs_ticks; 108 extern struct nfs_public nfs_pub; 109 110 /* NFS client/server stats. */ 111 struct nfsstats nfsstats; 112 113 /* 114 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 115 */ 116 int nfsv3_procid[NFS_NPROCS] = { 117 NFSPROC_NULL, 118 NFSPROC_GETATTR, 119 NFSPROC_SETATTR, 120 NFSPROC_NOOP, 121 NFSPROC_LOOKUP, 122 NFSPROC_READLINK, 123 NFSPROC_READ, 124 NFSPROC_NOOP, 125 NFSPROC_WRITE, 126 NFSPROC_CREATE, 127 NFSPROC_REMOVE, 128 NFSPROC_RENAME, 129 NFSPROC_LINK, 130 NFSPROC_SYMLINK, 131 NFSPROC_MKDIR, 132 NFSPROC_RMDIR, 133 NFSPROC_READDIR, 134 NFSPROC_FSSTAT, 135 NFSPROC_NOOP, 136 NFSPROC_NOOP, 137 NFSPROC_NOOP, 138 NFSPROC_NOOP, 139 NFSPROC_NOOP, 140 NFSPROC_NOOP, 141 NFSPROC_NOOP, 142 NFSPROC_NOOP 143 }; 144 145 /* 146 * and the reverse mapping from generic to Version 2 procedure numbers 147 */ 148 int nfsv2_procid[NFS_NPROCS] = { 149 NFSV2PROC_NULL, 150 NFSV2PROC_GETATTR, 151 NFSV2PROC_SETATTR, 152 NFSV2PROC_LOOKUP, 153 NFSV2PROC_NOOP, 154 NFSV2PROC_READLINK, 155 NFSV2PROC_READ, 156 NFSV2PROC_WRITE, 157 NFSV2PROC_CREATE, 158 NFSV2PROC_MKDIR, 159 NFSV2PROC_SYMLINK, 160 NFSV2PROC_CREATE, 161 NFSV2PROC_REMOVE, 162 NFSV2PROC_RMDIR, 163 NFSV2PROC_RENAME, 164 NFSV2PROC_LINK, 165 NFSV2PROC_READDIR, 166 NFSV2PROC_NOOP, 167 NFSV2PROC_STATFS, 168 NFSV2PROC_NOOP, 169 NFSV2PROC_NOOP, 170 NFSV2PROC_NOOP, 171 NFSV2PROC_NOOP, 172 NFSV2PROC_NOOP, 173 NFSV2PROC_NOOP, 174 NFSV2PROC_NOOP, 175 }; 176 177 /* 178 * Maps errno values to nfs error numbers. 179 * Use NFSERR_IO as the catch all for ones not specifically defined in 180 * RFC 1094. 181 */ 182 static u_char nfsrv_v2errmap[ELAST] = { 183 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 184 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 185 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 186 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 187 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 188 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 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_IO, NFSERR_IO, NFSERR_IO, 195 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 196 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 197 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 198 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 199 NFSERR_IO, NFSERR_IO, 200 }; 201 202 /* 203 * Maps errno values to nfs error numbers. 204 * Although it is not obvious whether or not NFS clients really care if 205 * a returned error value is in the specified list for the procedure, the 206 * safest thing to do is filter them appropriately. For Version 2, the 207 * X/Open XNFS document is the only specification that defines error values 208 * for each RPC (The RFC simply lists all possible error values for all RPCs), 209 * so I have decided to not do this for Version 2. 210 * The first entry is the default error return and the rest are the valid 211 * errors for that RPC in increasing numeric order. 212 */ 213 static short nfsv3err_null[] = { 214 0, 215 0, 216 }; 217 218 static short nfsv3err_getattr[] = { 219 NFSERR_IO, 220 NFSERR_IO, 221 NFSERR_STALE, 222 NFSERR_BADHANDLE, 223 NFSERR_SERVERFAULT, 224 0, 225 }; 226 227 static short nfsv3err_setattr[] = { 228 NFSERR_IO, 229 NFSERR_PERM, 230 NFSERR_IO, 231 NFSERR_ACCES, 232 NFSERR_INVAL, 233 NFSERR_NOSPC, 234 NFSERR_ROFS, 235 NFSERR_DQUOT, 236 NFSERR_STALE, 237 NFSERR_BADHANDLE, 238 NFSERR_NOT_SYNC, 239 NFSERR_SERVERFAULT, 240 0, 241 }; 242 243 static short nfsv3err_lookup[] = { 244 NFSERR_IO, 245 NFSERR_NOENT, 246 NFSERR_IO, 247 NFSERR_ACCES, 248 NFSERR_NOTDIR, 249 NFSERR_NAMETOL, 250 NFSERR_STALE, 251 NFSERR_BADHANDLE, 252 NFSERR_SERVERFAULT, 253 0, 254 }; 255 256 static short nfsv3err_access[] = { 257 NFSERR_IO, 258 NFSERR_IO, 259 NFSERR_STALE, 260 NFSERR_BADHANDLE, 261 NFSERR_SERVERFAULT, 262 0, 263 }; 264 265 static short nfsv3err_readlink[] = { 266 NFSERR_IO, 267 NFSERR_IO, 268 NFSERR_ACCES, 269 NFSERR_INVAL, 270 NFSERR_STALE, 271 NFSERR_BADHANDLE, 272 NFSERR_NOTSUPP, 273 NFSERR_SERVERFAULT, 274 0, 275 }; 276 277 static short nfsv3err_read[] = { 278 NFSERR_IO, 279 NFSERR_IO, 280 NFSERR_NXIO, 281 NFSERR_ACCES, 282 NFSERR_INVAL, 283 NFSERR_STALE, 284 NFSERR_BADHANDLE, 285 NFSERR_SERVERFAULT, 286 0, 287 }; 288 289 static short nfsv3err_write[] = { 290 NFSERR_IO, 291 NFSERR_IO, 292 NFSERR_ACCES, 293 NFSERR_INVAL, 294 NFSERR_FBIG, 295 NFSERR_NOSPC, 296 NFSERR_ROFS, 297 NFSERR_DQUOT, 298 NFSERR_STALE, 299 NFSERR_BADHANDLE, 300 NFSERR_SERVERFAULT, 301 0, 302 }; 303 304 static short nfsv3err_create[] = { 305 NFSERR_IO, 306 NFSERR_IO, 307 NFSERR_ACCES, 308 NFSERR_EXIST, 309 NFSERR_NOTDIR, 310 NFSERR_NOSPC, 311 NFSERR_ROFS, 312 NFSERR_NAMETOL, 313 NFSERR_DQUOT, 314 NFSERR_STALE, 315 NFSERR_BADHANDLE, 316 NFSERR_NOTSUPP, 317 NFSERR_SERVERFAULT, 318 0, 319 }; 320 321 static short nfsv3err_mkdir[] = { 322 NFSERR_IO, 323 NFSERR_IO, 324 NFSERR_ACCES, 325 NFSERR_EXIST, 326 NFSERR_NOTDIR, 327 NFSERR_NOSPC, 328 NFSERR_ROFS, 329 NFSERR_NAMETOL, 330 NFSERR_DQUOT, 331 NFSERR_STALE, 332 NFSERR_BADHANDLE, 333 NFSERR_NOTSUPP, 334 NFSERR_SERVERFAULT, 335 0, 336 }; 337 338 static short nfsv3err_symlink[] = { 339 NFSERR_IO, 340 NFSERR_IO, 341 NFSERR_ACCES, 342 NFSERR_EXIST, 343 NFSERR_NOTDIR, 344 NFSERR_NOSPC, 345 NFSERR_ROFS, 346 NFSERR_NAMETOL, 347 NFSERR_DQUOT, 348 NFSERR_STALE, 349 NFSERR_BADHANDLE, 350 NFSERR_NOTSUPP, 351 NFSERR_SERVERFAULT, 352 0, 353 }; 354 355 static short nfsv3err_mknod[] = { 356 NFSERR_IO, 357 NFSERR_IO, 358 NFSERR_ACCES, 359 NFSERR_EXIST, 360 NFSERR_NOTDIR, 361 NFSERR_NOSPC, 362 NFSERR_ROFS, 363 NFSERR_NAMETOL, 364 NFSERR_DQUOT, 365 NFSERR_STALE, 366 NFSERR_BADHANDLE, 367 NFSERR_NOTSUPP, 368 NFSERR_SERVERFAULT, 369 NFSERR_BADTYPE, 370 0, 371 }; 372 373 static short nfsv3err_remove[] = { 374 NFSERR_IO, 375 NFSERR_NOENT, 376 NFSERR_IO, 377 NFSERR_ACCES, 378 NFSERR_NOTDIR, 379 NFSERR_ROFS, 380 NFSERR_NAMETOL, 381 NFSERR_STALE, 382 NFSERR_BADHANDLE, 383 NFSERR_SERVERFAULT, 384 0, 385 }; 386 387 static short nfsv3err_rmdir[] = { 388 NFSERR_IO, 389 NFSERR_NOENT, 390 NFSERR_IO, 391 NFSERR_ACCES, 392 NFSERR_EXIST, 393 NFSERR_NOTDIR, 394 NFSERR_INVAL, 395 NFSERR_ROFS, 396 NFSERR_NAMETOL, 397 NFSERR_NOTEMPTY, 398 NFSERR_STALE, 399 NFSERR_BADHANDLE, 400 NFSERR_NOTSUPP, 401 NFSERR_SERVERFAULT, 402 0, 403 }; 404 405 static short nfsv3err_rename[] = { 406 NFSERR_IO, 407 NFSERR_NOENT, 408 NFSERR_IO, 409 NFSERR_ACCES, 410 NFSERR_EXIST, 411 NFSERR_XDEV, 412 NFSERR_NOTDIR, 413 NFSERR_ISDIR, 414 NFSERR_INVAL, 415 NFSERR_NOSPC, 416 NFSERR_ROFS, 417 NFSERR_MLINK, 418 NFSERR_NAMETOL, 419 NFSERR_NOTEMPTY, 420 NFSERR_DQUOT, 421 NFSERR_STALE, 422 NFSERR_BADHANDLE, 423 NFSERR_NOTSUPP, 424 NFSERR_SERVERFAULT, 425 0, 426 }; 427 428 static short nfsv3err_link[] = { 429 NFSERR_IO, 430 NFSERR_IO, 431 NFSERR_ACCES, 432 NFSERR_EXIST, 433 NFSERR_XDEV, 434 NFSERR_NOTDIR, 435 NFSERR_INVAL, 436 NFSERR_NOSPC, 437 NFSERR_ROFS, 438 NFSERR_MLINK, 439 NFSERR_NAMETOL, 440 NFSERR_DQUOT, 441 NFSERR_STALE, 442 NFSERR_BADHANDLE, 443 NFSERR_NOTSUPP, 444 NFSERR_SERVERFAULT, 445 0, 446 }; 447 448 static short nfsv3err_readdir[] = { 449 NFSERR_IO, 450 NFSERR_IO, 451 NFSERR_ACCES, 452 NFSERR_NOTDIR, 453 NFSERR_STALE, 454 NFSERR_BADHANDLE, 455 NFSERR_BAD_COOKIE, 456 NFSERR_TOOSMALL, 457 NFSERR_SERVERFAULT, 458 0, 459 }; 460 461 static short nfsv3err_readdirplus[] = { 462 NFSERR_IO, 463 NFSERR_IO, 464 NFSERR_ACCES, 465 NFSERR_NOTDIR, 466 NFSERR_STALE, 467 NFSERR_BADHANDLE, 468 NFSERR_BAD_COOKIE, 469 NFSERR_NOTSUPP, 470 NFSERR_TOOSMALL, 471 NFSERR_SERVERFAULT, 472 0, 473 }; 474 475 static short nfsv3err_fsstat[] = { 476 NFSERR_IO, 477 NFSERR_IO, 478 NFSERR_STALE, 479 NFSERR_BADHANDLE, 480 NFSERR_SERVERFAULT, 481 0, 482 }; 483 484 static short nfsv3err_fsinfo[] = { 485 NFSERR_STALE, 486 NFSERR_STALE, 487 NFSERR_BADHANDLE, 488 NFSERR_SERVERFAULT, 489 0, 490 }; 491 492 static short nfsv3err_pathconf[] = { 493 NFSERR_STALE, 494 NFSERR_STALE, 495 NFSERR_BADHANDLE, 496 NFSERR_SERVERFAULT, 497 0, 498 }; 499 500 static short nfsv3err_commit[] = { 501 NFSERR_IO, 502 NFSERR_IO, 503 NFSERR_STALE, 504 NFSERR_BADHANDLE, 505 NFSERR_SERVERFAULT, 506 0, 507 }; 508 509 static short *nfsrv_v3errmap[] = { 510 nfsv3err_null, 511 nfsv3err_getattr, 512 nfsv3err_setattr, 513 nfsv3err_lookup, 514 nfsv3err_access, 515 nfsv3err_readlink, 516 nfsv3err_read, 517 nfsv3err_write, 518 nfsv3err_create, 519 nfsv3err_mkdir, 520 nfsv3err_symlink, 521 nfsv3err_mknod, 522 nfsv3err_remove, 523 nfsv3err_rmdir, 524 nfsv3err_rename, 525 nfsv3err_link, 526 nfsv3err_readdir, 527 nfsv3err_readdirplus, 528 nfsv3err_fsstat, 529 nfsv3err_fsinfo, 530 nfsv3err_pathconf, 531 nfsv3err_commit, 532 }; 533 534 extern struct nfsrtt nfsrtt; 535 extern time_t nqnfsstarttime; 536 extern int nqsrv_clockskew; 537 extern int nqsrv_writeslack; 538 extern int nqsrv_maxlease; 539 extern int nqnfs_piggy[NFS_NPROCS]; 540 extern nfstype nfsv2_type[9]; 541 extern nfstype nfsv3_type[9]; 542 extern struct nfsnodehashhead *nfsnodehashtbl; 543 extern u_long nfsnodehash; 544 545 LIST_HEAD(nfsnodehashhead, nfsnode); 546 u_long nfsdirhashmask; 547 548 int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 549 550 /* 551 * Create the header for an rpc request packet 552 * The hsiz is the size of the rest of the nfs request header. 553 * (just used to decide if a cluster is a good idea) 554 */ 555 struct mbuf * 556 nfsm_reqh(vp, procid, hsiz, bposp) 557 struct vnode *vp; 558 u_long procid; 559 int hsiz; 560 caddr_t *bposp; 561 { 562 register struct mbuf *mb; 563 register u_int32_t *tl; 564 register caddr_t bpos; 565 struct mbuf *mb2; 566 struct nfsmount *nmp; 567 int nqflag; 568 569 MGET(mb, M_WAIT, MT_DATA); 570 if (hsiz >= MINCLSIZE) 571 MCLGET(mb, M_WAIT); 572 mb->m_len = 0; 573 bpos = mtod(mb, caddr_t); 574 575 /* 576 * For NQNFS, add lease request. 577 */ 578 if (vp) { 579 nmp = VFSTONFS(vp->v_mount); 580 if (nmp->nm_flag & NFSMNT_NQNFS) { 581 nqflag = NQNFS_NEEDLEASE(vp, procid); 582 if (nqflag) { 583 nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED); 584 *tl++ = txdr_unsigned(nqflag); 585 *tl = txdr_unsigned(nmp->nm_leaseterm); 586 } else { 587 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 588 *tl = 0; 589 } 590 } 591 } 592 /* Finally, return values */ 593 *bposp = bpos; 594 return (mb); 595 } 596 597 /* 598 * Build the RPC header and fill in the authorization info. 599 * The authorization string argument is only used when the credentials 600 * come from outside of the kernel. 601 * Returns the head of the mbuf list. 602 */ 603 struct mbuf * 604 nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 605 verf_str, mrest, mrest_len, mbp, xidp) 606 register struct ucred *cr; 607 int nmflag; 608 int procid; 609 int auth_type; 610 int auth_len; 611 char *auth_str; 612 int verf_len; 613 char *verf_str; 614 struct mbuf *mrest; 615 int mrest_len; 616 struct mbuf **mbp; 617 u_int32_t *xidp; 618 { 619 register struct mbuf *mb; 620 register u_int32_t *tl; 621 register caddr_t bpos; 622 register int i; 623 struct mbuf *mreq, *mb2; 624 int siz, grpsiz, authsiz; 625 struct timeval tv; 626 static u_int32_t base; 627 628 authsiz = nfsm_rndup(auth_len); 629 MGETHDR(mb, M_WAIT, MT_DATA); 630 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 631 MCLGET(mb, M_WAIT); 632 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 633 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 634 } else { 635 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 636 } 637 mb->m_len = 0; 638 mreq = mb; 639 bpos = mtod(mb, caddr_t); 640 641 /* 642 * First the RPC header. 643 */ 644 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 645 646 /* 647 * derive initial xid from system time 648 * XXX time is invalid if root not yet mounted 649 */ 650 if (!base && (rootvp)) { 651 microtime(&tv); 652 base = tv.tv_sec << 12; 653 nfs_xid = base; 654 } 655 /* 656 * Skip zero xid if it should ever happen. 657 */ 658 if (++nfs_xid == 0) 659 nfs_xid++; 660 661 *tl++ = *xidp = txdr_unsigned(nfs_xid); 662 *tl++ = rpc_call; 663 *tl++ = rpc_vers; 664 if (nmflag & NFSMNT_NQNFS) { 665 *tl++ = txdr_unsigned(NQNFS_PROG); 666 *tl++ = txdr_unsigned(NQNFS_VER3); 667 } else { 668 *tl++ = txdr_unsigned(NFS_PROG); 669 if (nmflag & NFSMNT_NFSV3) 670 *tl++ = txdr_unsigned(NFS_VER3); 671 else 672 *tl++ = txdr_unsigned(NFS_VER2); 673 } 674 if (nmflag & NFSMNT_NFSV3) 675 *tl++ = txdr_unsigned(procid); 676 else 677 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 678 679 /* 680 * And then the authorization cred. 681 */ 682 *tl++ = txdr_unsigned(auth_type); 683 *tl = txdr_unsigned(authsiz); 684 switch (auth_type) { 685 case RPCAUTH_UNIX: 686 nfsm_build(tl, u_int32_t *, auth_len); 687 *tl++ = 0; /* stamp ?? */ 688 *tl++ = 0; /* NULL hostname */ 689 *tl++ = txdr_unsigned(cr->cr_uid); 690 *tl++ = txdr_unsigned(cr->cr_gid); 691 grpsiz = (auth_len >> 2) - 5; 692 *tl++ = txdr_unsigned(grpsiz); 693 for (i = 0; i < grpsiz; i++) 694 *tl++ = txdr_unsigned(cr->cr_groups[i]); 695 break; 696 case RPCAUTH_KERB4: 697 siz = auth_len; 698 while (siz > 0) { 699 if (M_TRAILINGSPACE(mb) == 0) { 700 MGET(mb2, M_WAIT, MT_DATA); 701 if (siz >= MINCLSIZE) 702 MCLGET(mb2, M_WAIT); 703 mb->m_next = mb2; 704 mb = mb2; 705 mb->m_len = 0; 706 bpos = mtod(mb, caddr_t); 707 } 708 i = min(siz, M_TRAILINGSPACE(mb)); 709 bcopy(auth_str, bpos, i); 710 mb->m_len += i; 711 auth_str += i; 712 bpos += i; 713 siz -= i; 714 } 715 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 716 for (i = 0; i < siz; i++) 717 *bpos++ = '\0'; 718 mb->m_len += siz; 719 } 720 break; 721 }; 722 723 /* 724 * And the verifier... 725 */ 726 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 727 if (verf_str) { 728 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 729 *tl = txdr_unsigned(verf_len); 730 siz = verf_len; 731 while (siz > 0) { 732 if (M_TRAILINGSPACE(mb) == 0) { 733 MGET(mb2, M_WAIT, MT_DATA); 734 if (siz >= MINCLSIZE) 735 MCLGET(mb2, M_WAIT); 736 mb->m_next = mb2; 737 mb = mb2; 738 mb->m_len = 0; 739 bpos = mtod(mb, caddr_t); 740 } 741 i = min(siz, M_TRAILINGSPACE(mb)); 742 bcopy(verf_str, bpos, i); 743 mb->m_len += i; 744 verf_str += i; 745 bpos += i; 746 siz -= i; 747 } 748 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 749 for (i = 0; i < siz; i++) 750 *bpos++ = '\0'; 751 mb->m_len += siz; 752 } 753 } else { 754 *tl++ = txdr_unsigned(RPCAUTH_NULL); 755 *tl = 0; 756 } 757 mb->m_next = mrest; 758 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 759 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 760 *mbp = mb; 761 return (mreq); 762 } 763 764 /* 765 * copies mbuf chain to the uio scatter/gather list 766 */ 767 int 768 nfsm_mbuftouio(mrep, uiop, siz, dpos) 769 struct mbuf **mrep; 770 register struct uio *uiop; 771 int siz; 772 caddr_t *dpos; 773 { 774 register char *mbufcp, *uiocp; 775 register int xfer, left, len; 776 register struct mbuf *mp; 777 long uiosiz, rem; 778 int error = 0; 779 780 mp = *mrep; 781 mbufcp = *dpos; 782 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 783 rem = nfsm_rndup(siz)-siz; 784 while (siz > 0) { 785 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 786 return (EFBIG); 787 left = uiop->uio_iov->iov_len; 788 uiocp = uiop->uio_iov->iov_base; 789 if (left > siz) 790 left = siz; 791 uiosiz = left; 792 while (left > 0) { 793 while (len == 0) { 794 mp = mp->m_next; 795 if (mp == NULL) 796 return (EBADRPC); 797 mbufcp = mtod(mp, caddr_t); 798 len = mp->m_len; 799 } 800 xfer = (left > len) ? len : left; 801 #ifdef notdef 802 /* Not Yet.. */ 803 if (uiop->uio_iov->iov_op != NULL) 804 (*(uiop->uio_iov->iov_op)) 805 (mbufcp, uiocp, xfer); 806 else 807 #endif 808 if (uiop->uio_segflg == UIO_SYSSPACE) 809 bcopy(mbufcp, uiocp, xfer); 810 else 811 copyout(mbufcp, uiocp, xfer); 812 left -= xfer; 813 len -= xfer; 814 mbufcp += xfer; 815 uiocp += xfer; 816 uiop->uio_offset += xfer; 817 uiop->uio_resid -= xfer; 818 } 819 if (uiop->uio_iov->iov_len <= siz) { 820 uiop->uio_iovcnt--; 821 uiop->uio_iov++; 822 } else { 823 uiop->uio_iov->iov_base += uiosiz; 824 uiop->uio_iov->iov_len -= uiosiz; 825 } 826 siz -= uiosiz; 827 } 828 *dpos = mbufcp; 829 *mrep = mp; 830 if (rem > 0) { 831 if (len < rem) 832 error = nfs_adv(mrep, dpos, rem, len); 833 else 834 *dpos += rem; 835 } 836 return (error); 837 } 838 839 /* 840 * copies a uio scatter/gather list to an mbuf chain. 841 * NOTE: can ony handle iovcnt == 1 842 */ 843 int 844 nfsm_uiotombuf(uiop, mq, siz, bpos) 845 register struct uio *uiop; 846 struct mbuf **mq; 847 int siz; 848 caddr_t *bpos; 849 { 850 register char *uiocp; 851 register struct mbuf *mp, *mp2; 852 register int xfer, left, mlen; 853 int uiosiz, clflg, rem; 854 char *cp; 855 856 #ifdef DIAGNOSTIC 857 if (uiop->uio_iovcnt != 1) 858 panic("nfsm_uiotombuf: iovcnt != 1"); 859 #endif 860 861 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 862 clflg = 1; 863 else 864 clflg = 0; 865 rem = nfsm_rndup(siz)-siz; 866 mp = mp2 = *mq; 867 while (siz > 0) { 868 left = uiop->uio_iov->iov_len; 869 uiocp = uiop->uio_iov->iov_base; 870 if (left > siz) 871 left = siz; 872 uiosiz = left; 873 while (left > 0) { 874 mlen = M_TRAILINGSPACE(mp); 875 if (mlen == 0) { 876 MGET(mp, M_WAIT, MT_DATA); 877 if (clflg) 878 MCLGET(mp, M_WAIT); 879 mp->m_len = 0; 880 mp2->m_next = mp; 881 mp2 = mp; 882 mlen = M_TRAILINGSPACE(mp); 883 } 884 xfer = (left > mlen) ? mlen : left; 885 #ifdef notdef 886 /* Not Yet.. */ 887 if (uiop->uio_iov->iov_op != NULL) 888 (*(uiop->uio_iov->iov_op)) 889 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 890 else 891 #endif 892 if (uiop->uio_segflg == UIO_SYSSPACE) 893 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 894 else 895 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 896 mp->m_len += xfer; 897 left -= xfer; 898 uiocp += xfer; 899 uiop->uio_offset += xfer; 900 uiop->uio_resid -= xfer; 901 } 902 uiop->uio_iov->iov_base += uiosiz; 903 uiop->uio_iov->iov_len -= uiosiz; 904 siz -= uiosiz; 905 } 906 if (rem > 0) { 907 if (rem > M_TRAILINGSPACE(mp)) { 908 MGET(mp, M_WAIT, MT_DATA); 909 mp->m_len = 0; 910 mp2->m_next = mp; 911 } 912 cp = mtod(mp, caddr_t)+mp->m_len; 913 for (left = 0; left < rem; left++) 914 *cp++ = '\0'; 915 mp->m_len += rem; 916 *bpos = cp; 917 } else 918 *bpos = mtod(mp, caddr_t)+mp->m_len; 919 *mq = mp; 920 return (0); 921 } 922 923 /* 924 * Get at least "siz" bytes of correctly aligned data. 925 * When called the mbuf pointers are not necessarily correct, 926 * dsosp points to what ought to be in m_data and left contains 927 * what ought to be in m_len. 928 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 929 * cases. (The macros use the vars. dpos and dpos2) 930 */ 931 int 932 nfsm_disct(mdp, dposp, siz, left, cp2) 933 struct mbuf **mdp; 934 caddr_t *dposp; 935 int siz; 936 int left; 937 caddr_t *cp2; 938 { 939 register struct mbuf *m1, *m2; 940 struct mbuf *havebuf = NULL; 941 caddr_t src = *dposp; 942 caddr_t dst; 943 int len; 944 945 #ifdef DEBUG 946 if (left < 0) 947 panic("nfsm_disct: left < 0"); 948 #endif 949 m1 = *mdp; 950 /* 951 * Skip through the mbuf chain looking for an mbuf with 952 * some data. If the first mbuf found has enough data 953 * and it is correctly aligned return it. 954 */ 955 while (left == 0) { 956 havebuf = m1; 957 *mdp = m1 = m1->m_next; 958 if (m1 == NULL) 959 return (EBADRPC); 960 src = mtod(m1, caddr_t); 961 left = m1->m_len; 962 /* 963 * If we start a new mbuf and it is big enough 964 * and correctly aligned just return it, don't 965 * do any pull up. 966 */ 967 if (left >= siz && nfsm_aligned(src)) { 968 *cp2 = src; 969 *dposp = src + siz; 970 return (0); 971 } 972 } 973 if (m1->m_flags & M_EXT) { 974 if (havebuf) { 975 /* If the first mbuf with data has external data 976 * and there is a previous empty mbuf use it 977 * to move the data into. 978 */ 979 m2 = m1; 980 *mdp = m1 = havebuf; 981 if (m1->m_flags & M_EXT) { 982 MEXTREMOVE(m1); 983 } 984 } else { 985 /* 986 * If the first mbuf has a external data 987 * and there is no previous empty mbuf 988 * allocate a new mbuf and move the external 989 * data to the new mbuf. Also make the first 990 * mbuf look empty. 991 */ 992 m2 = m_get(M_WAIT, MT_DATA); 993 m2->m_ext = m1->m_ext; 994 m2->m_data = src; 995 m2->m_len = left; 996 MCLADDREFERENCE(m1, m2); 997 MEXTREMOVE(m1); 998 m2->m_next = m1->m_next; 999 m1->m_next = m2; 1000 } 1001 m1->m_len = 0; 1002 dst = m1->m_dat; 1003 } else { 1004 /* 1005 * If the first mbuf has no external data 1006 * move the data to the front of the mbuf. 1007 */ 1008 if ((dst = m1->m_dat) != src) 1009 ovbcopy(src, dst, left); 1010 dst += left; 1011 m1->m_len = left; 1012 m2 = m1->m_next; 1013 } 1014 m1->m_flags &= ~M_PKTHDR; 1015 *cp2 = m1->m_data = m1->m_dat; /* data is at beginning of buffer */ 1016 *dposp = mtod(m1, caddr_t) + siz; 1017 /* 1018 * Loop through mbufs pulling data up into first mbuf until 1019 * the first mbuf is full or there is no more data to 1020 * pullup. 1021 */ 1022 while ((len = (MLEN - m1->m_len)) != 0 && m2) { 1023 if ((len = min(len, m2->m_len)) != 0) 1024 bcopy(m2->m_data, dst, len); 1025 m1->m_len += len; 1026 dst += len; 1027 m2->m_data += len; 1028 m2->m_len -= len; 1029 m2 = m2->m_next; 1030 } 1031 if (m1->m_len < siz) 1032 return (EBADRPC); 1033 return (0); 1034 } 1035 1036 /* 1037 * Advance the position in the mbuf chain. 1038 */ 1039 int 1040 nfs_adv(mdp, dposp, offs, left) 1041 struct mbuf **mdp; 1042 caddr_t *dposp; 1043 int offs; 1044 int left; 1045 { 1046 register struct mbuf *m; 1047 register int s; 1048 1049 m = *mdp; 1050 s = left; 1051 while (s < offs) { 1052 offs -= s; 1053 m = m->m_next; 1054 if (m == NULL) 1055 return (EBADRPC); 1056 s = m->m_len; 1057 } 1058 *mdp = m; 1059 *dposp = mtod(m, caddr_t)+offs; 1060 return (0); 1061 } 1062 1063 /* 1064 * Copy a string into mbufs for the hard cases... 1065 */ 1066 int 1067 nfsm_strtmbuf(mb, bpos, cp, siz) 1068 struct mbuf **mb; 1069 char **bpos; 1070 const char *cp; 1071 long siz; 1072 { 1073 register struct mbuf *m1 = NULL, *m2; 1074 long left, xfer, len, tlen; 1075 u_int32_t *tl; 1076 int putsize; 1077 1078 putsize = 1; 1079 m2 = *mb; 1080 left = M_TRAILINGSPACE(m2); 1081 if (left > 0) { 1082 tl = ((u_int32_t *)(*bpos)); 1083 *tl++ = txdr_unsigned(siz); 1084 putsize = 0; 1085 left -= NFSX_UNSIGNED; 1086 m2->m_len += NFSX_UNSIGNED; 1087 if (left > 0) { 1088 bcopy(cp, (caddr_t) tl, left); 1089 siz -= left; 1090 cp += left; 1091 m2->m_len += left; 1092 left = 0; 1093 } 1094 } 1095 /* Loop around adding mbufs */ 1096 while (siz > 0) { 1097 MGET(m1, M_WAIT, MT_DATA); 1098 if (siz > MLEN) 1099 MCLGET(m1, M_WAIT); 1100 m1->m_len = NFSMSIZ(m1); 1101 m2->m_next = m1; 1102 m2 = m1; 1103 tl = mtod(m1, u_int32_t *); 1104 tlen = 0; 1105 if (putsize) { 1106 *tl++ = txdr_unsigned(siz); 1107 m1->m_len -= NFSX_UNSIGNED; 1108 tlen = NFSX_UNSIGNED; 1109 putsize = 0; 1110 } 1111 if (siz < m1->m_len) { 1112 len = nfsm_rndup(siz); 1113 xfer = siz; 1114 if (xfer < len) 1115 *(tl+(xfer>>2)) = 0; 1116 } else { 1117 xfer = len = m1->m_len; 1118 } 1119 bcopy(cp, (caddr_t) tl, xfer); 1120 m1->m_len = len+tlen; 1121 siz -= xfer; 1122 cp += xfer; 1123 } 1124 *mb = m1; 1125 *bpos = mtod(m1, caddr_t)+m1->m_len; 1126 return (0); 1127 } 1128 1129 /* 1130 * Directory caching routines. They work as follows: 1131 * - a cache is maintained per VDIR nfsnode. 1132 * - for each offset cookie that is exported to userspace, and can 1133 * thus be thrown back at us as an offset to VOP_READDIR, store 1134 * information in the cache. 1135 * - cached are: 1136 * - cookie itself 1137 * - blocknumber (essentially just a search key in the buffer cache) 1138 * - entry number in block. 1139 * - offset cookie of block in which this entry is stored 1140 * - 32 bit cookie if NFSMNT_XLATECOOKIE is used. 1141 * - entries are looked up in a hash table 1142 * - also maintained is an LRU list of entries, used to determine 1143 * which ones to delete if the cache grows too large. 1144 * - if 32 <-> 64 translation mode is requested for a filesystem, 1145 * the cache also functions as a translation table 1146 * - in the translation case, invalidating the cache does not mean 1147 * flushing it, but just marking entries as invalid, except for 1148 * the <64bit cookie, 32bitcookie> pair which is still valid, to 1149 * still be able to use the cache as a translation table. 1150 * - 32 bit cookies are uniquely created by combining the hash table 1151 * entry value, and one generation count per hash table entry, 1152 * incremented each time an entry is appended to the chain. 1153 * - the cache is invalidated each time a direcory is modified 1154 * - sanity checks are also done; if an entry in a block turns 1155 * out not to have a matching cookie, the cache is invalidated 1156 * and a new block starting from the wanted offset is fetched from 1157 * the server. 1158 * - directory entries as read from the server are extended to contain 1159 * the 64bit and, optionally, the 32bit cookies, for sanity checking 1160 * the cache and exporting them to userspace through the cookie 1161 * argument to VOP_READDIR. 1162 */ 1163 1164 u_long 1165 nfs_dirhash(off) 1166 off_t off; 1167 { 1168 int i; 1169 char *cp = (char *)&off; 1170 u_long sum = 0L; 1171 1172 for (i = 0 ; i < sizeof (off); i++) 1173 sum += *cp++; 1174 1175 return sum; 1176 } 1177 1178 void 1179 nfs_initdircache(vp) 1180 struct vnode *vp; 1181 { 1182 struct nfsnode *np = VTONFS(vp); 1183 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1184 1185 np->n_dircachesize = 0; 1186 np->n_dblkno = 1; 1187 np->n_dircache = 1188 hashinit(NFS_DIRHASHSIZ, M_NFSDIROFF, M_WAITOK, &nfsdirhashmask); 1189 TAILQ_INIT(&np->n_dirchain); 1190 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) { 1191 MALLOC(np->n_dirgens, unsigned *, 1192 NFS_DIRHASHSIZ * sizeof (unsigned), M_NFSDIROFF, 1193 M_WAITOK); 1194 bzero((caddr_t)np->n_dirgens, 1195 NFS_DIRHASHSIZ * sizeof (unsigned)); 1196 } 1197 } 1198 1199 static struct nfsdircache dzero = {0, 0, {0, 0}, {0, 0}, 0, 0, 0}; 1200 1201 struct nfsdircache * 1202 nfs_searchdircache(vp, off, do32, hashent) 1203 struct vnode *vp; 1204 off_t off; 1205 int do32; 1206 int *hashent; 1207 { 1208 struct nfsdirhashhead *ndhp; 1209 struct nfsdircache *ndp = NULL; 1210 struct nfsnode *np = VTONFS(vp); 1211 unsigned ent; 1212 1213 /* 1214 * Zero is always a valid cookie. 1215 */ 1216 if (off == 0) 1217 return &dzero; 1218 1219 /* 1220 * We use a 32bit cookie as search key, directly reconstruct 1221 * the hashentry. Else use the hashfunction. 1222 */ 1223 if (do32) { 1224 ent = (u_int32_t)off >> 24; 1225 if (ent >= NFS_DIRHASHSIZ) 1226 return NULL; 1227 ndhp = &np->n_dircache[ent]; 1228 } else { 1229 ndhp = NFSDIRHASH(np, off); 1230 } 1231 1232 if (hashent) 1233 *hashent = (int)(ndhp - np->n_dircache); 1234 if (do32) { 1235 for (ndp = ndhp->lh_first; ndp; ndp = ndp->dc_hash.le_next) { 1236 if (ndp->dc_cookie32 == (u_int32_t)off) { 1237 /* 1238 * An invalidated entry will become the 1239 * start of a new block fetched from 1240 * the server. 1241 */ 1242 if (ndp->dc_blkno == -1) { 1243 ndp->dc_blkcookie = ndp->dc_cookie; 1244 ndp->dc_blkno = np->n_dblkno++; 1245 ndp->dc_entry = 0; 1246 } 1247 break; 1248 } 1249 } 1250 } else { 1251 for (ndp = ndhp->lh_first; ndp; ndp = ndp->dc_hash.le_next) 1252 if (ndp->dc_cookie == off) 1253 break; 1254 } 1255 return ndp; 1256 } 1257 1258 1259 struct nfsdircache * 1260 nfs_enterdircache(vp, off, blkoff, en, blkno) 1261 struct vnode *vp; 1262 off_t off, blkoff; 1263 daddr_t blkno; 1264 int en; 1265 { 1266 struct nfsnode *np = VTONFS(vp); 1267 struct nfsdirhashhead *ndhp; 1268 struct nfsdircache *ndp = NULL, *first; 1269 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1270 int hashent, gen, overwrite; 1271 1272 if (!np->n_dircache) 1273 /* 1274 * XXX would like to do this in nfs_nget but vtype 1275 * isn't known at that time. 1276 */ 1277 nfs_initdircache(vp); 1278 1279 /* 1280 * XXX refuse entries for offset 0. amd(8) erroneously sets 1281 * cookie 0 for the '.' entry, making this necessary. This 1282 * isn't so bad, as 0 is a special case anyway. 1283 */ 1284 if (off == 0) 1285 return &dzero; 1286 1287 ndp = nfs_searchdircache(vp, off, 0, &hashent); 1288 1289 if (ndp && ndp->dc_blkno != -1) { 1290 /* 1291 * Overwriting an old entry. Check if it's the same. 1292 * If so, just return. If not, remove the old entry. 1293 */ 1294 if (ndp->dc_blkcookie == blkoff && ndp->dc_entry == en) 1295 return ndp; 1296 TAILQ_REMOVE(&np->n_dirchain, ndp, dc_chain); 1297 LIST_REMOVE(ndp, dc_hash); 1298 FREE(ndp, M_NFSDIROFF); 1299 ndp = 0; 1300 } 1301 1302 ndhp = &np->n_dircache[hashent]; 1303 1304 if (!ndp) { 1305 MALLOC(ndp, struct nfsdircache *, sizeof (*ndp), M_NFSDIROFF, 1306 M_WAITOK); 1307 overwrite = 0; 1308 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) { 1309 /* 1310 * We're allocating a new entry, so bump the 1311 * generation number. 1312 */ 1313 gen = ++np->n_dirgens[hashent]; 1314 if (gen == 0) { 1315 np->n_dirgens[hashent]++; 1316 gen++; 1317 } 1318 ndp->dc_cookie32 = (hashent << 24) | (gen & 0xffffff); 1319 } 1320 } else 1321 overwrite = 1; 1322 1323 /* 1324 * If the entry number is 0, we are at the start of a new block, so 1325 * allocate a new blocknumber. 1326 */ 1327 if (en == 0) 1328 ndp->dc_blkno = np->n_dblkno++; 1329 else 1330 ndp->dc_blkno = blkno; 1331 1332 ndp->dc_cookie = off; 1333 ndp->dc_blkcookie = blkoff; 1334 ndp->dc_entry = en; 1335 1336 if (overwrite) 1337 return ndp; 1338 1339 /* 1340 * If the maximum directory cookie cache size has been reached 1341 * for this node, take one off the front. The idea is that 1342 * directories are typically read front-to-back once, so that 1343 * the oldest entries can be thrown away without much performance 1344 * loss. 1345 */ 1346 if (np->n_dircachesize == NFS_MAXDIRCACHE) { 1347 first = np->n_dirchain.tqh_first; 1348 TAILQ_REMOVE(&np->n_dirchain, first, dc_chain); 1349 LIST_REMOVE(first, dc_hash); 1350 FREE(first, M_NFSDIROFF); 1351 } else 1352 np->n_dircachesize++; 1353 1354 LIST_INSERT_HEAD(ndhp, ndp, dc_hash); 1355 TAILQ_INSERT_TAIL(&np->n_dirchain, ndp, dc_chain); 1356 return ndp; 1357 } 1358 1359 void 1360 nfs_invaldircache(vp, forcefree) 1361 struct vnode *vp; 1362 int forcefree; 1363 { 1364 struct nfsnode *np = VTONFS(vp); 1365 struct nfsdircache *ndp = NULL; 1366 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1367 1368 #ifdef DIAGNOSTIC 1369 if (vp->v_type != VDIR) 1370 panic("nfs: invaldircache: not dir"); 1371 #endif 1372 1373 if (!np->n_dircache) 1374 return; 1375 1376 if (!(nmp->nm_flag & NFSMNT_XLATECOOKIE) || forcefree) { 1377 while ((ndp = np->n_dirchain.tqh_first)) { 1378 TAILQ_REMOVE(&np->n_dirchain, ndp, dc_chain); 1379 LIST_REMOVE(ndp, dc_hash); 1380 FREE(ndp, M_NFSDIROFF); 1381 } 1382 np->n_dircachesize = 0; 1383 if (forcefree && np->n_dirgens) { 1384 FREE(np->n_dirgens, M_NFSDIROFF); 1385 } 1386 } else { 1387 for (ndp = np->n_dirchain.tqh_first; ndp; 1388 ndp = ndp->dc_chain.tqe_next) 1389 ndp->dc_blkno = -1; 1390 } 1391 1392 np->n_dblkno = 1; 1393 } 1394 1395 /* 1396 * Called once before VFS init to initialize shared and 1397 * server-specific data structures. 1398 */ 1399 void 1400 nfs_init() 1401 { 1402 1403 #if !defined(alpha) && defined(DIAGNOSTIC) 1404 /* 1405 * Check to see if major data structures haven't bloated. 1406 */ 1407 if (sizeof (struct nfsnode) > NFS_NODEALLOC) { 1408 printf("struct nfsnode bloated (> %dbytes)\n", NFS_NODEALLOC); 1409 printf("Try reducing NFS_SMALLFH\n"); 1410 } 1411 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1412 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1413 printf("Try reducing NFS_UIDHASHSIZ\n"); 1414 } 1415 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1416 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1417 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1418 } 1419 #endif 1420 1421 nfsrtt.pos = 0; 1422 rpc_vers = txdr_unsigned(RPC_VER2); 1423 rpc_call = txdr_unsigned(RPC_CALL); 1424 rpc_reply = txdr_unsigned(RPC_REPLY); 1425 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1426 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1427 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1428 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1429 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1430 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1431 nfs_prog = txdr_unsigned(NFS_PROG); 1432 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1433 nfs_true = txdr_unsigned(TRUE); 1434 nfs_false = txdr_unsigned(FALSE); 1435 nfs_xdrneg1 = txdr_unsigned(-1); 1436 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1437 if (nfs_ticks < 1) 1438 nfs_ticks = 1; 1439 #ifdef NFSSERVER 1440 nfsrv_init(0); /* Init server data structures */ 1441 nfsrv_initcache(); /* Init the server request cache */ 1442 #endif /* NFSSERVER */ 1443 1444 /* 1445 * Initialize the nqnfs data structures. 1446 */ 1447 if (nqnfsstarttime == 0) { 1448 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1449 + nqsrv_clockskew + nqsrv_writeslack; 1450 NQLOADNOVRAM(nqnfsstarttime); 1451 CIRCLEQ_INIT(&nqtimerhead); 1452 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, M_WAITOK, &nqfhhash); 1453 } 1454 1455 /* 1456 * Initialize reply list and start timer 1457 */ 1458 TAILQ_INIT(&nfs_reqq); 1459 nfs_timer(NULL); 1460 } 1461 1462 #ifdef NFS 1463 /* 1464 * Called once at VFS init to initialize client-specific data structures. 1465 */ 1466 void 1467 nfs_vfs_init() 1468 { 1469 register int i; 1470 1471 /* Ensure async daemons disabled */ 1472 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1473 nfs_iodwant[i] = (struct proc *)0; 1474 nfs_iodmount[i] = (struct nfsmount *)0; 1475 } 1476 nfs_nhinit(); /* Init the nfsnode table */ 1477 } 1478 1479 /* 1480 * Attribute cache routines. 1481 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1482 * that are on the mbuf list 1483 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1484 * error otherwise 1485 */ 1486 1487 /* 1488 * Load the attribute cache (that lives in the nfsnode entry) with 1489 * the values on the mbuf list and 1490 * Iff vap not NULL 1491 * copy the attributes to *vaper 1492 */ 1493 int 1494 nfsm_loadattrcache(vpp, mdp, dposp, vaper) 1495 struct vnode **vpp; 1496 struct mbuf **mdp; 1497 caddr_t *dposp; 1498 struct vattr *vaper; 1499 { 1500 register int32_t t1; 1501 caddr_t cp2; 1502 int error = 0; 1503 struct mbuf *md; 1504 int v3 = NFS_ISV3(*vpp); 1505 1506 md = *mdp; 1507 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1508 error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2); 1509 if (error) 1510 return (error); 1511 return nfs_loadattrcache(vpp, (struct nfs_fattr *)cp2, vaper); 1512 } 1513 1514 int 1515 nfs_loadattrcache(vpp, fp, vaper) 1516 struct vnode **vpp; 1517 struct nfs_fattr *fp; 1518 struct vattr *vaper; 1519 { 1520 register struct vnode *vp = *vpp; 1521 register struct vattr *vap; 1522 int v3 = NFS_ISV3(vp); 1523 enum vtype vtyp; 1524 u_short vmode; 1525 struct timespec mtime; 1526 struct vnode *nvp; 1527 int32_t rdev; 1528 register struct nfsnode *np; 1529 extern int (**spec_nfsv2nodeop_p) __P((void *)); 1530 1531 if (v3) { 1532 vtyp = nfsv3tov_type(fp->fa_type); 1533 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1534 rdev = makedev(fxdr_unsigned(u_char, fp->fa3_rdev.specdata1), 1535 fxdr_unsigned(u_char, fp->fa3_rdev.specdata2)); 1536 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1537 } else { 1538 vtyp = nfsv2tov_type(fp->fa_type); 1539 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1540 if (vtyp == VNON || vtyp == VREG) 1541 vtyp = IFTOVT(vmode); 1542 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1543 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1544 1545 /* 1546 * Really ugly NFSv2 kludge. 1547 */ 1548 if (vtyp == VCHR && rdev == 0xffffffff) 1549 vtyp = VFIFO; 1550 } 1551 1552 /* 1553 * If v_type == VNON it is a new node, so fill in the v_type, 1554 * n_mtime fields. Check to see if it represents a special 1555 * device, and if so, check for a possible alias. Once the 1556 * correct vnode has been obtained, fill in the rest of the 1557 * information. 1558 */ 1559 np = VTONFS(vp); 1560 if (vp->v_type != vtyp) { 1561 vp->v_type = vtyp; 1562 if (vp->v_type == VFIFO) { 1563 #ifndef FIFO 1564 return (EOPNOTSUPP); 1565 #else 1566 extern int (**fifo_nfsv2nodeop_p) __P((void *)); 1567 vp->v_op = fifo_nfsv2nodeop_p; 1568 #endif /* FIFO */ 1569 } 1570 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1571 vp->v_op = spec_nfsv2nodeop_p; 1572 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1573 if (nvp) { 1574 /* 1575 * Discard unneeded vnode, but save its nfsnode. 1576 * Since the nfsnode does not have a lock, its 1577 * vnode lock has to be carried over. 1578 */ 1579 #ifdef Lite2_integrated 1580 nvp->v_vnlock = vp->v_vnlock; 1581 vp->v_vnlock = NULL; 1582 #endif 1583 nvp->v_data = vp->v_data; 1584 vp->v_data = NULL; 1585 vp->v_op = spec_vnodeop_p; 1586 vrele(vp); 1587 vgone(vp); 1588 /* 1589 * Reinitialize aliased node. 1590 */ 1591 np->n_vnode = nvp; 1592 *vpp = vp = nvp; 1593 } 1594 } 1595 np->n_mtime = mtime.tv_sec; 1596 } 1597 vap = np->n_vattr; 1598 vap->va_type = vtyp; 1599 vap->va_mode = vmode & ALLPERMS; 1600 vap->va_rdev = (dev_t)rdev; 1601 vap->va_mtime = mtime; 1602 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1603 if (v3) { 1604 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1605 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1606 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1607 fxdr_hyper(&fp->fa3_size, &vap->va_size); 1608 if (vtyp == VDIR) 1609 vap->va_blocksize = NFS_DIRFRAGSIZ; 1610 else 1611 vap->va_blocksize = NFS_FABLKSIZE; 1612 fxdr_hyper(&fp->fa3_used, &vap->va_bytes); 1613 vap->va_fileid = fxdr_unsigned(int32_t, 1614 fp->fa3_fileid.nfsuquad[1]); 1615 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1616 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1617 vap->va_flags = 0; 1618 vap->va_filerev = 0; 1619 } else { 1620 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1621 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1622 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1623 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1624 if (vtyp == VDIR) 1625 vap->va_blocksize = NFS_DIRFRAGSIZ; 1626 else 1627 vap->va_blocksize = 1628 fxdr_unsigned(int32_t, fp->fa2_blocksize); 1629 vap->va_bytes = fxdr_unsigned(int32_t, fp->fa2_blocks) 1630 * NFS_FABLKSIZE; 1631 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1632 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1633 vap->va_flags = 0; 1634 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1635 fp->fa2_ctime.nfsv2_sec); 1636 vap->va_ctime.tv_nsec = 0; 1637 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1638 vap->va_filerev = 0; 1639 } 1640 if (vap->va_size != np->n_size) { 1641 if (vap->va_type == VREG) { 1642 if (np->n_flag & NMODIFIED) { 1643 if (vap->va_size < np->n_size) 1644 vap->va_size = np->n_size; 1645 else 1646 np->n_size = vap->va_size; 1647 } else 1648 np->n_size = vap->va_size; 1649 #if defined(UVM) 1650 uvm_vnp_setsize(vp, np->n_size); 1651 #else 1652 vnode_pager_setsize(vp, np->n_size); 1653 #endif 1654 } else 1655 np->n_size = vap->va_size; 1656 } 1657 np->n_attrstamp = time.tv_sec; 1658 if (vaper != NULL) { 1659 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1660 if (np->n_flag & NCHG) { 1661 if (np->n_flag & NACC) 1662 vaper->va_atime = np->n_atim; 1663 if (np->n_flag & NUPD) 1664 vaper->va_mtime = np->n_mtim; 1665 } 1666 } 1667 return (0); 1668 } 1669 1670 /* 1671 * Check the time stamp 1672 * If the cache is valid, copy contents to *vap and return 0 1673 * otherwise return an error 1674 */ 1675 int 1676 nfs_getattrcache(vp, vaper) 1677 register struct vnode *vp; 1678 struct vattr *vaper; 1679 { 1680 register struct nfsnode *np = VTONFS(vp); 1681 register struct vattr *vap; 1682 1683 if ((time.tv_sec - np->n_attrstamp) >= NFS_ATTRTIMEO(np)) { 1684 nfsstats.attrcache_misses++; 1685 return (ENOENT); 1686 } 1687 nfsstats.attrcache_hits++; 1688 vap = np->n_vattr; 1689 if (vap->va_size != np->n_size) { 1690 if (vap->va_type == VREG) { 1691 if (np->n_flag & NMODIFIED) { 1692 if (vap->va_size < np->n_size) 1693 vap->va_size = np->n_size; 1694 else 1695 np->n_size = vap->va_size; 1696 } else 1697 np->n_size = vap->va_size; 1698 #if defined(UVM) 1699 uvm_vnp_setsize(vp, np->n_size); 1700 #else 1701 vnode_pager_setsize(vp, np->n_size); 1702 #endif 1703 } else 1704 np->n_size = vap->va_size; 1705 } 1706 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1707 if (np->n_flag & NCHG) { 1708 if (np->n_flag & NACC) 1709 vaper->va_atime = np->n_atim; 1710 if (np->n_flag & NUPD) 1711 vaper->va_mtime = np->n_mtim; 1712 } 1713 return (0); 1714 } 1715 1716 /* 1717 * Heuristic to see if the server XDR encodes directory cookies or not. 1718 * it is not supposed to, but a lot of servers may do this. Also, since 1719 * most/all servers will implement V2 as well, it is expected that they 1720 * may return just 32 bits worth of cookie information, so we need to 1721 * find out in which 32 bits this information is available. We do this 1722 * to avoid trouble with emulated binaries that can't handle 64 bit 1723 * directory offsets. 1724 */ 1725 1726 void 1727 nfs_cookieheuristic(vp, flagp, p, cred) 1728 struct vnode *vp; 1729 int *flagp; 1730 struct proc *p; 1731 struct ucred *cred; 1732 { 1733 struct uio auio; 1734 struct iovec aiov; 1735 caddr_t buf, cp; 1736 struct dirent *dp; 1737 off_t *cookies, *cop; 1738 int error, eof, nc, len; 1739 1740 nc = NFS_DIRFRAGSIZ / 16; 1741 MALLOC(buf, caddr_t, NFS_DIRFRAGSIZ, M_TEMP, M_WAITOK); 1742 MALLOC(cookies, off_t *, nc * sizeof (off_t), M_TEMP, M_WAITOK); 1743 1744 aiov.iov_base = buf; 1745 aiov.iov_len = NFS_DIRFRAGSIZ; 1746 auio.uio_iov = &aiov; 1747 auio.uio_iovcnt = 1; 1748 auio.uio_rw = UIO_READ; 1749 auio.uio_segflg = UIO_SYSSPACE; 1750 auio.uio_procp = p; 1751 auio.uio_resid = NFS_DIRFRAGSIZ; 1752 auio.uio_offset = 0; 1753 1754 error = VOP_READDIR(vp, &auio, cred, &eof, cookies, nc); 1755 1756 len = NFS_DIRFRAGSIZ - auio.uio_resid; 1757 if (error || len == 0) { 1758 FREE(buf, M_TEMP); 1759 FREE(cookies, M_TEMP); 1760 return; 1761 } 1762 1763 /* 1764 * Find the first valid entry and look at its offset cookie. 1765 */ 1766 1767 cp = buf; 1768 for (cop = cookies; len > 0; len -= dp->d_reclen) { 1769 dp = (struct dirent *)cp; 1770 if (dp->d_fileno != 0 && len >= dp->d_reclen) { 1771 if ((*cop >> 32) != 0 && (*cop & 0xffffffffLL) == 0) { 1772 *flagp |= NFSMNT_SWAPCOOKIE; 1773 nfs_invaldircache(vp, 0); 1774 nfs_vinvalbuf(vp, 0, cred, p, 1); 1775 } 1776 break; 1777 } 1778 cop++; 1779 cp += dp->d_reclen; 1780 } 1781 1782 FREE(buf, M_TEMP); 1783 FREE(cookies, M_TEMP); 1784 } 1785 #endif /* NFS */ 1786 1787 /* 1788 * Set up nameidata for a lookup() call and do it. 1789 * 1790 * If pubflag is set, this call is done for a lookup operation on the 1791 * public filehandle. In that case we allow crossing mountpoints and 1792 * absolute pathnames. However, the caller is expected to check that 1793 * the lookup result is within the public fs, and deny access if 1794 * it is not. 1795 */ 1796 int 1797 nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1798 register struct nameidata *ndp; 1799 fhandle_t *fhp; 1800 int len; 1801 struct nfssvc_sock *slp; 1802 struct mbuf *nam; 1803 struct mbuf **mdp; 1804 caddr_t *dposp; 1805 struct vnode **retdirp; 1806 struct proc *p; 1807 int kerbflag, pubflag; 1808 { 1809 register int i, rem; 1810 register struct mbuf *md; 1811 register char *fromcp, *tocp, *cp; 1812 struct iovec aiov; 1813 struct uio auio; 1814 struct vnode *dp; 1815 int error, rdonly, linklen; 1816 struct componentname *cnp = &ndp->ni_cnd; 1817 1818 *retdirp = (struct vnode *)0; 1819 MALLOC(cnp->cn_pnbuf, char *, len + 1, M_NAMEI, M_WAITOK); 1820 /* 1821 * Copy the name from the mbuf list to ndp->ni_pnbuf 1822 * and set the various ndp fields appropriately. 1823 */ 1824 fromcp = *dposp; 1825 tocp = cnp->cn_pnbuf; 1826 md = *mdp; 1827 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1828 for (i = 0; i < len; i++) { 1829 while (rem == 0) { 1830 md = md->m_next; 1831 if (md == NULL) { 1832 error = EBADRPC; 1833 goto out; 1834 } 1835 fromcp = mtod(md, caddr_t); 1836 rem = md->m_len; 1837 } 1838 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1839 error = EACCES; 1840 goto out; 1841 } 1842 *tocp++ = *fromcp++; 1843 rem--; 1844 } 1845 *tocp = '\0'; 1846 *mdp = md; 1847 *dposp = fromcp; 1848 len = nfsm_rndup(len)-len; 1849 if (len > 0) { 1850 if (rem >= len) 1851 *dposp += len; 1852 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1853 goto out; 1854 } 1855 1856 /* 1857 * Extract and set starting directory. 1858 */ 1859 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1860 nam, &rdonly, kerbflag, pubflag); 1861 if (error) 1862 goto out; 1863 if (dp->v_type != VDIR) { 1864 vrele(dp); 1865 error = ENOTDIR; 1866 goto out; 1867 } 1868 1869 if (rdonly) 1870 cnp->cn_flags |= RDONLY; 1871 1872 *retdirp = dp; 1873 1874 if (pubflag) { 1875 /* 1876 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1877 * and the 'native path' indicator. 1878 */ 1879 MALLOC(cp, char *, MAXPATHLEN, M_NAMEI, M_WAITOK); 1880 fromcp = cnp->cn_pnbuf; 1881 tocp = cp; 1882 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1883 switch ((unsigned char)*fromcp) { 1884 case WEBNFS_NATIVE_CHAR: 1885 /* 1886 * 'Native' path for us is the same 1887 * as a path according to the NFS spec, 1888 * just skip the escape char. 1889 */ 1890 fromcp++; 1891 break; 1892 /* 1893 * More may be added in the future, range 0x80-0xff 1894 */ 1895 default: 1896 error = EIO; 1897 FREE(cp, M_NAMEI); 1898 goto out; 1899 } 1900 } 1901 /* 1902 * Translate the '%' escapes, URL-style. 1903 */ 1904 while (*fromcp != '\0') { 1905 if (*fromcp == WEBNFS_ESC_CHAR) { 1906 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1907 fromcp++; 1908 *tocp++ = HEXSTRTOI(fromcp); 1909 fromcp += 2; 1910 continue; 1911 } else { 1912 error = ENOENT; 1913 FREE(cp, M_NAMEI); 1914 goto out; 1915 } 1916 } else 1917 *tocp++ = *fromcp++; 1918 } 1919 *tocp = '\0'; 1920 FREE(cnp->cn_pnbuf, M_NAMEI); 1921 cnp->cn_pnbuf = cp; 1922 } 1923 1924 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1925 ndp->ni_segflg = UIO_SYSSPACE; 1926 1927 if (pubflag) { 1928 ndp->ni_rootdir = rootvnode; 1929 ndp->ni_loopcnt = 0; 1930 if (cnp->cn_pnbuf[0] == '/') 1931 dp = rootvnode; 1932 } else { 1933 cnp->cn_flags |= NOCROSSMOUNT; 1934 } 1935 1936 cnp->cn_proc = p; 1937 VREF(dp); 1938 1939 for (;;) { 1940 cnp->cn_nameptr = cnp->cn_pnbuf; 1941 ndp->ni_startdir = dp; 1942 /* 1943 * And call lookup() to do the real work 1944 */ 1945 error = lookup(ndp); 1946 if (error) 1947 break; 1948 /* 1949 * Check for encountering a symbolic link 1950 */ 1951 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1952 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1953 cnp->cn_flags |= HASBUF; 1954 return (0); 1955 } 1956 break; 1957 } else { 1958 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1959 VOP_UNLOCK(ndp->ni_dvp); 1960 if (!pubflag) { 1961 vrele(ndp->ni_dvp); 1962 vput(ndp->ni_vp); 1963 ndp->ni_vp = NULL; 1964 error = EINVAL; 1965 break; 1966 } 1967 1968 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1969 error = ELOOP; 1970 break; 1971 } 1972 if (ndp->ni_pathlen > 1) 1973 MALLOC(cp, char *, MAXPATHLEN, M_NAMEI, M_WAITOK); 1974 else 1975 cp = cnp->cn_pnbuf; 1976 aiov.iov_base = cp; 1977 aiov.iov_len = MAXPATHLEN; 1978 auio.uio_iov = &aiov; 1979 auio.uio_iovcnt = 1; 1980 auio.uio_offset = 0; 1981 auio.uio_rw = UIO_READ; 1982 auio.uio_segflg = UIO_SYSSPACE; 1983 auio.uio_procp = (struct proc *)0; 1984 auio.uio_resid = MAXPATHLEN; 1985 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1986 if (error) { 1987 badlink: 1988 if (ndp->ni_pathlen > 1) 1989 FREE(cp, M_NAMEI); 1990 break; 1991 } 1992 linklen = MAXPATHLEN - auio.uio_resid; 1993 if (linklen == 0) { 1994 error = ENOENT; 1995 goto badlink; 1996 } 1997 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1998 error = ENAMETOOLONG; 1999 goto badlink; 2000 } 2001 if (ndp->ni_pathlen > 1) { 2002 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 2003 FREE(cnp->cn_pnbuf, M_NAMEI); 2004 cnp->cn_pnbuf = cp; 2005 } else 2006 cnp->cn_pnbuf[linklen] = '\0'; 2007 ndp->ni_pathlen += linklen; 2008 vput(ndp->ni_vp); 2009 dp = ndp->ni_dvp; 2010 /* 2011 * Check if root directory should replace current directory. 2012 */ 2013 if (cnp->cn_pnbuf[0] == '/') { 2014 vrele(dp); 2015 dp = ndp->ni_rootdir; 2016 VREF(dp); 2017 } 2018 } 2019 } 2020 out: 2021 FREE(cnp->cn_pnbuf, M_NAMEI); 2022 return (error); 2023 } 2024 2025 /* 2026 * A fiddled version of m_adj() that ensures null fill to a long 2027 * boundary and only trims off the back end 2028 */ 2029 void 2030 nfsm_adj(mp, len, nul) 2031 struct mbuf *mp; 2032 register int len; 2033 int nul; 2034 { 2035 register struct mbuf *m; 2036 register int count, i; 2037 register char *cp; 2038 2039 /* 2040 * Trim from tail. Scan the mbuf chain, 2041 * calculating its length and finding the last mbuf. 2042 * If the adjustment only affects this mbuf, then just 2043 * adjust and return. Otherwise, rescan and truncate 2044 * after the remaining size. 2045 */ 2046 count = 0; 2047 m = mp; 2048 for (;;) { 2049 count += m->m_len; 2050 if (m->m_next == (struct mbuf *)0) 2051 break; 2052 m = m->m_next; 2053 } 2054 if (m->m_len > len) { 2055 m->m_len -= len; 2056 if (nul > 0) { 2057 cp = mtod(m, caddr_t)+m->m_len-nul; 2058 for (i = 0; i < nul; i++) 2059 *cp++ = '\0'; 2060 } 2061 return; 2062 } 2063 count -= len; 2064 if (count < 0) 2065 count = 0; 2066 /* 2067 * Correct length for chain is "count". 2068 * Find the mbuf with last data, adjust its length, 2069 * and toss data from remaining mbufs on chain. 2070 */ 2071 for (m = mp; m; m = m->m_next) { 2072 if (m->m_len >= count) { 2073 m->m_len = count; 2074 if (nul > 0) { 2075 cp = mtod(m, caddr_t)+m->m_len-nul; 2076 for (i = 0; i < nul; i++) 2077 *cp++ = '\0'; 2078 } 2079 break; 2080 } 2081 count -= m->m_len; 2082 } 2083 for (m = m->m_next;m;m = m->m_next) 2084 m->m_len = 0; 2085 } 2086 2087 /* 2088 * Make these functions instead of macros, so that the kernel text size 2089 * doesn't get too big... 2090 */ 2091 void 2092 nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 2093 struct nfsrv_descript *nfsd; 2094 int before_ret; 2095 register struct vattr *before_vap; 2096 int after_ret; 2097 struct vattr *after_vap; 2098 struct mbuf **mbp; 2099 char **bposp; 2100 { 2101 register struct mbuf *mb = *mbp, *mb2; 2102 register char *bpos = *bposp; 2103 register u_int32_t *tl; 2104 2105 if (before_ret) { 2106 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 2107 *tl = nfs_false; 2108 } else { 2109 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 2110 *tl++ = nfs_true; 2111 txdr_hyper(&(before_vap->va_size), tl); 2112 tl += 2; 2113 txdr_nfsv3time(&(before_vap->va_mtime), tl); 2114 tl += 2; 2115 txdr_nfsv3time(&(before_vap->va_ctime), tl); 2116 } 2117 *bposp = bpos; 2118 *mbp = mb; 2119 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 2120 } 2121 2122 void 2123 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 2124 struct nfsrv_descript *nfsd; 2125 int after_ret; 2126 struct vattr *after_vap; 2127 struct mbuf **mbp; 2128 char **bposp; 2129 { 2130 register struct mbuf *mb = *mbp, *mb2; 2131 register char *bpos = *bposp; 2132 register u_int32_t *tl; 2133 register struct nfs_fattr *fp; 2134 2135 if (after_ret) { 2136 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 2137 *tl = nfs_false; 2138 } else { 2139 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 2140 *tl++ = nfs_true; 2141 fp = (struct nfs_fattr *)tl; 2142 nfsm_srvfattr(nfsd, after_vap, fp); 2143 } 2144 *mbp = mb; 2145 *bposp = bpos; 2146 } 2147 2148 void 2149 nfsm_srvfattr(nfsd, vap, fp) 2150 register struct nfsrv_descript *nfsd; 2151 register struct vattr *vap; 2152 register struct nfs_fattr *fp; 2153 { 2154 2155 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 2156 fp->fa_uid = txdr_unsigned(vap->va_uid); 2157 fp->fa_gid = txdr_unsigned(vap->va_gid); 2158 if (nfsd->nd_flag & ND_NFSV3) { 2159 fp->fa_type = vtonfsv3_type(vap->va_type); 2160 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 2161 txdr_hyper(&vap->va_size, &fp->fa3_size); 2162 txdr_hyper(&vap->va_bytes, &fp->fa3_used); 2163 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 2164 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 2165 fp->fa3_fsid.nfsuquad[0] = 0; 2166 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 2167 fp->fa3_fileid.nfsuquad[0] = 0; 2168 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 2169 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 2170 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 2171 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 2172 } else { 2173 fp->fa_type = vtonfsv2_type(vap->va_type); 2174 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 2175 fp->fa2_size = txdr_unsigned(vap->va_size); 2176 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 2177 if (vap->va_type == VFIFO) 2178 fp->fa2_rdev = 0xffffffff; 2179 else 2180 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 2181 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 2182 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 2183 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 2184 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 2185 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 2186 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 2187 } 2188 } 2189 2190 /* 2191 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 2192 * - look up fsid in mount list (if not found ret error) 2193 * - get vp and export rights by calling VFS_FHTOVP() 2194 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2195 * - if not lockflag unlock it with VOP_UNLOCK() 2196 */ 2197 int 2198 nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 2199 fhandle_t *fhp; 2200 int lockflag; 2201 struct vnode **vpp; 2202 struct ucred *cred; 2203 struct nfssvc_sock *slp; 2204 struct mbuf *nam; 2205 int *rdonlyp; 2206 int kerbflag; 2207 { 2208 #ifdef Lite2_integrated 2209 struct proc *p = curproc; /* XXX */ 2210 #endif 2211 register struct mount *mp; 2212 register int i; 2213 struct ucred *credanon; 2214 int error, exflags; 2215 struct sockaddr_in *saddr; 2216 2217 *vpp = (struct vnode *)0; 2218 2219 if (nfs_ispublicfh(fhp)) { 2220 if (!pubflag || !nfs_pub.np_valid) 2221 return (ESTALE); 2222 fhp = &nfs_pub.np_handle; 2223 } 2224 2225 #ifdef Lite2_integrated 2226 mp = vfs_getvfs(&fhp->fh_fsid); 2227 #else 2228 mp = getvfs(&fhp->fh_fsid); 2229 #endif 2230 if (!mp) 2231 return (ESTALE); 2232 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon); 2233 if (error) 2234 return (error); 2235 2236 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 2237 saddr = mtod(nam, struct sockaddr_in *); 2238 if (saddr->sin_family == AF_INET && 2239 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 2240 vput(*vpp); 2241 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2242 } 2243 } 2244 /* 2245 * Check/setup credentials. 2246 */ 2247 if (exflags & MNT_EXKERB) { 2248 if (!kerbflag) { 2249 vput(*vpp); 2250 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2251 } 2252 } else if (kerbflag) { 2253 vput(*vpp); 2254 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2255 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 2256 cred->cr_uid = credanon->cr_uid; 2257 cred->cr_gid = credanon->cr_gid; 2258 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 2259 cred->cr_groups[i] = credanon->cr_groups[i]; 2260 cred->cr_ngroups = i; 2261 } 2262 if (exflags & MNT_EXRDONLY) 2263 *rdonlyp = 1; 2264 else 2265 *rdonlyp = 0; 2266 if (!lockflag) 2267 #ifdef Lite2_integrated 2268 VOP_UNLOCK(*vpp, 0, p); 2269 #else 2270 VOP_UNLOCK(*vpp); 2271 #endif 2272 return (0); 2273 } 2274 2275 /* 2276 * WebNFS: check if a filehandle is a public filehandle. For v3, this 2277 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 2278 * transformed this to all zeroes in both cases, so check for it. 2279 */ 2280 int 2281 nfs_ispublicfh(fhp) 2282 fhandle_t *fhp; 2283 { 2284 char *cp = (char *)fhp; 2285 int i; 2286 2287 for (i = 0; i < NFSX_V3FH; i++) 2288 if (*cp++ != 0) 2289 return (FALSE); 2290 return (TRUE); 2291 } 2292 2293 /* 2294 * This function compares two net addresses by family and returns TRUE 2295 * if they are the same host. 2296 * If there is any doubt, return FALSE. 2297 * The AF_INET family is handled as a special case so that address mbufs 2298 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 2299 */ 2300 int 2301 netaddr_match(family, haddr, nam) 2302 int family; 2303 union nethostaddr *haddr; 2304 struct mbuf *nam; 2305 { 2306 register struct sockaddr_in *inetaddr; 2307 2308 switch (family) { 2309 case AF_INET: 2310 inetaddr = mtod(nam, struct sockaddr_in *); 2311 if (inetaddr->sin_family == AF_INET && 2312 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 2313 return (1); 2314 break; 2315 #ifdef ISO 2316 case AF_ISO: 2317 { 2318 register struct sockaddr_iso *isoaddr1, *isoaddr2; 2319 2320 isoaddr1 = mtod(nam, struct sockaddr_iso *); 2321 isoaddr2 = mtod(haddr->had_nam, struct sockaddr_iso *); 2322 if (isoaddr1->siso_family == AF_ISO && 2323 isoaddr1->siso_nlen > 0 && 2324 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 2325 SAME_ISOADDR(isoaddr1, isoaddr2)) 2326 return (1); 2327 break; 2328 } 2329 #endif /* ISO */ 2330 default: 2331 break; 2332 }; 2333 return (0); 2334 } 2335 2336 2337 /* 2338 * The write verifier has changed (probably due to a server reboot), so all 2339 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2340 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2341 * flag. Once done the new write verifier can be set for the mount point. 2342 */ 2343 void 2344 nfs_clearcommit(mp) 2345 struct mount *mp; 2346 { 2347 register struct vnode *vp, *nvp; 2348 register struct buf *bp, *nbp; 2349 int s; 2350 2351 s = splbio(); 2352 loop: 2353 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2354 if (vp->v_mount != mp) /* Paranoia */ 2355 goto loop; 2356 nvp = vp->v_mntvnodes.le_next; 2357 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2358 nbp = bp->b_vnbufs.le_next; 2359 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2360 == (B_DELWRI | B_NEEDCOMMIT)) 2361 bp->b_flags &= ~B_NEEDCOMMIT; 2362 } 2363 } 2364 splx(s); 2365 } 2366 2367 /* 2368 * Map errnos to NFS error numbers. For Version 3 also filter out error 2369 * numbers not specified for the associated procedure. 2370 */ 2371 int 2372 nfsrv_errmap(nd, err) 2373 struct nfsrv_descript *nd; 2374 register int err; 2375 { 2376 register short *defaulterrp, *errp; 2377 2378 if (nd->nd_flag & ND_NFSV3) { 2379 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2380 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2381 while (*++errp) { 2382 if (*errp == err) 2383 return (err); 2384 else if (*errp > err) 2385 break; 2386 } 2387 return ((int)*defaulterrp); 2388 } else 2389 return (err & 0xffff); 2390 } 2391 if (err <= ELAST) 2392 return ((int)nfsrv_v2errmap[err - 1]); 2393 return (NFSERR_IO); 2394 } 2395 2396 /* 2397 * Sort the group list in increasing numerical order. 2398 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 2399 * that used to be here.) 2400 */ 2401 void 2402 nfsrvw_sort(list, num) 2403 register gid_t *list; 2404 register int num; 2405 { 2406 register int i, j; 2407 gid_t v; 2408 2409 /* Insertion sort. */ 2410 for (i = 1; i < num; i++) { 2411 v = list[i]; 2412 /* find correct slot for value v, moving others up */ 2413 for (j = i; --j >= 0 && v < list[j];) 2414 list[j + 1] = list[j]; 2415 list[j + 1] = v; 2416 } 2417 } 2418 2419 /* 2420 * copy credentials making sure that the result can be compared with bcmp(). 2421 */ 2422 void 2423 nfsrv_setcred(incred, outcred) 2424 register struct ucred *incred, *outcred; 2425 { 2426 register int i; 2427 2428 bzero((caddr_t)outcred, sizeof (struct ucred)); 2429 outcred->cr_ref = 1; 2430 outcred->cr_uid = incred->cr_uid; 2431 outcred->cr_gid = incred->cr_gid; 2432 outcred->cr_ngroups = incred->cr_ngroups; 2433 for (i = 0; i < incred->cr_ngroups; i++) 2434 outcred->cr_groups[i] = incred->cr_groups[i]; 2435 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 2436 } 2437
Indexes created Mon Sep 22 21:09:42 GMT 2025