nfs_subs.c revision 1.47
1 /* $NetBSD: nfs_subs.c,v 1.47 1997/10/10 13:21:51 fvdl Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_subs.c 8.8 (Berkeley) 5/22/95 39 */ 40 41 42 /* 43 * These functions support the macros and help fiddle mbuf chains for 44 * the nfs op functions. They do things like create the rpc header and 45 * copy data between mbuf chains and uio lists. 46 */ 47 #include <sys/param.h> 48 #include <sys/proc.h> 49 #include <sys/systm.h> 50 #include <sys/kernel.h> 51 #include <sys/mount.h> 52 #include <sys/vnode.h> 53 #include <sys/namei.h> 54 #include <sys/mbuf.h> 55 #include <sys/socket.h> 56 #include <sys/stat.h> 57 #include <sys/malloc.h> 58 #include <sys/time.h> 59 #include <sys/dirent.h> 60 61 #include <vm/vm.h> 62 63 #include <nfs/rpcv2.h> 64 #include <nfs/nfsproto.h> 65 #include <nfs/nfsnode.h> 66 #include <nfs/nfs.h> 67 #include <nfs/xdr_subs.h> 68 #include <nfs/nfsm_subs.h> 69 #include <nfs/nfsmount.h> 70 #include <nfs/nqnfs.h> 71 #include <nfs/nfsrtt.h> 72 #include <nfs/nfs_var.h> 73 74 #include <miscfs/specfs/specdev.h> 75 76 #include <vm/vm.h> 77 78 #include <netinet/in.h> 79 #ifdef ISO 80 #include <netiso/iso.h> 81 #endif 82 83 /* 84 * Data items converted to xdr at startup, since they are constant 85 * This is kinda hokey, but may save a little time doing byte swaps 86 */ 87 u_int32_t nfs_xdrneg1; 88 u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 89 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 90 rpc_auth_kerb; 91 u_int32_t nfs_prog, nqnfs_prog, nfs_true, nfs_false; 92 93 /* And other global data */ 94 static u_int32_t nfs_xid = 0; 95 nfstype nfsv2_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON, 96 NFCHR, NFNON }; 97 nfstype nfsv3_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFSOCK, 98 NFFIFO, NFNON }; 99 enum vtype nv2tov_type[8] = { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON }; 100 enum vtype nv3tov_type[8]={ VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO }; 101 int nfs_ticks; 102 extern struct nfs_public nfs_pub; 103 104 /* NFS client/server stats. */ 105 struct nfsstats nfsstats; 106 107 /* 108 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 109 */ 110 int nfsv3_procid[NFS_NPROCS] = { 111 NFSPROC_NULL, 112 NFSPROC_GETATTR, 113 NFSPROC_SETATTR, 114 NFSPROC_NOOP, 115 NFSPROC_LOOKUP, 116 NFSPROC_READLINK, 117 NFSPROC_READ, 118 NFSPROC_NOOP, 119 NFSPROC_WRITE, 120 NFSPROC_CREATE, 121 NFSPROC_REMOVE, 122 NFSPROC_RENAME, 123 NFSPROC_LINK, 124 NFSPROC_SYMLINK, 125 NFSPROC_MKDIR, 126 NFSPROC_RMDIR, 127 NFSPROC_READDIR, 128 NFSPROC_FSSTAT, 129 NFSPROC_NOOP, 130 NFSPROC_NOOP, 131 NFSPROC_NOOP, 132 NFSPROC_NOOP, 133 NFSPROC_NOOP, 134 NFSPROC_NOOP, 135 NFSPROC_NOOP, 136 NFSPROC_NOOP 137 }; 138 139 /* 140 * and the reverse mapping from generic to Version 2 procedure numbers 141 */ 142 int nfsv2_procid[NFS_NPROCS] = { 143 NFSV2PROC_NULL, 144 NFSV2PROC_GETATTR, 145 NFSV2PROC_SETATTR, 146 NFSV2PROC_LOOKUP, 147 NFSV2PROC_NOOP, 148 NFSV2PROC_READLINK, 149 NFSV2PROC_READ, 150 NFSV2PROC_WRITE, 151 NFSV2PROC_CREATE, 152 NFSV2PROC_MKDIR, 153 NFSV2PROC_SYMLINK, 154 NFSV2PROC_CREATE, 155 NFSV2PROC_REMOVE, 156 NFSV2PROC_RMDIR, 157 NFSV2PROC_RENAME, 158 NFSV2PROC_LINK, 159 NFSV2PROC_READDIR, 160 NFSV2PROC_NOOP, 161 NFSV2PROC_STATFS, 162 NFSV2PROC_NOOP, 163 NFSV2PROC_NOOP, 164 NFSV2PROC_NOOP, 165 NFSV2PROC_NOOP, 166 NFSV2PROC_NOOP, 167 NFSV2PROC_NOOP, 168 NFSV2PROC_NOOP, 169 }; 170 171 /* 172 * Maps errno values to nfs error numbers. 173 * Use NFSERR_IO as the catch all for ones not specifically defined in 174 * RFC 1094. 175 */ 176 static u_char nfsrv_v2errmap[ELAST] = { 177 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 178 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 179 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 180 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 181 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 182 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 183 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 184 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 185 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 186 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 187 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 188 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 189 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 190 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 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, 194 }; 195 196 /* 197 * Maps errno values to nfs error numbers. 198 * Although it is not obvious whether or not NFS clients really care if 199 * a returned error value is in the specified list for the procedure, the 200 * safest thing to do is filter them appropriately. For Version 2, the 201 * X/Open XNFS document is the only specification that defines error values 202 * for each RPC (The RFC simply lists all possible error values for all RPCs), 203 * so I have decided to not do this for Version 2. 204 * The first entry is the default error return and the rest are the valid 205 * errors for that RPC in increasing numeric order. 206 */ 207 static short nfsv3err_null[] = { 208 0, 209 0, 210 }; 211 212 static short nfsv3err_getattr[] = { 213 NFSERR_IO, 214 NFSERR_IO, 215 NFSERR_STALE, 216 NFSERR_BADHANDLE, 217 NFSERR_SERVERFAULT, 218 0, 219 }; 220 221 static short nfsv3err_setattr[] = { 222 NFSERR_IO, 223 NFSERR_PERM, 224 NFSERR_IO, 225 NFSERR_ACCES, 226 NFSERR_INVAL, 227 NFSERR_NOSPC, 228 NFSERR_ROFS, 229 NFSERR_DQUOT, 230 NFSERR_STALE, 231 NFSERR_BADHANDLE, 232 NFSERR_NOT_SYNC, 233 NFSERR_SERVERFAULT, 234 0, 235 }; 236 237 static short nfsv3err_lookup[] = { 238 NFSERR_IO, 239 NFSERR_NOENT, 240 NFSERR_IO, 241 NFSERR_ACCES, 242 NFSERR_NOTDIR, 243 NFSERR_NAMETOL, 244 NFSERR_STALE, 245 NFSERR_BADHANDLE, 246 NFSERR_SERVERFAULT, 247 0, 248 }; 249 250 static short nfsv3err_access[] = { 251 NFSERR_IO, 252 NFSERR_IO, 253 NFSERR_STALE, 254 NFSERR_BADHANDLE, 255 NFSERR_SERVERFAULT, 256 0, 257 }; 258 259 static short nfsv3err_readlink[] = { 260 NFSERR_IO, 261 NFSERR_IO, 262 NFSERR_ACCES, 263 NFSERR_INVAL, 264 NFSERR_STALE, 265 NFSERR_BADHANDLE, 266 NFSERR_NOTSUPP, 267 NFSERR_SERVERFAULT, 268 0, 269 }; 270 271 static short nfsv3err_read[] = { 272 NFSERR_IO, 273 NFSERR_IO, 274 NFSERR_NXIO, 275 NFSERR_ACCES, 276 NFSERR_INVAL, 277 NFSERR_STALE, 278 NFSERR_BADHANDLE, 279 NFSERR_SERVERFAULT, 280 0, 281 }; 282 283 static short nfsv3err_write[] = { 284 NFSERR_IO, 285 NFSERR_IO, 286 NFSERR_ACCES, 287 NFSERR_INVAL, 288 NFSERR_FBIG, 289 NFSERR_NOSPC, 290 NFSERR_ROFS, 291 NFSERR_DQUOT, 292 NFSERR_STALE, 293 NFSERR_BADHANDLE, 294 NFSERR_SERVERFAULT, 295 0, 296 }; 297 298 static short nfsv3err_create[] = { 299 NFSERR_IO, 300 NFSERR_IO, 301 NFSERR_ACCES, 302 NFSERR_EXIST, 303 NFSERR_NOTDIR, 304 NFSERR_NOSPC, 305 NFSERR_ROFS, 306 NFSERR_NAMETOL, 307 NFSERR_DQUOT, 308 NFSERR_STALE, 309 NFSERR_BADHANDLE, 310 NFSERR_NOTSUPP, 311 NFSERR_SERVERFAULT, 312 0, 313 }; 314 315 static short nfsv3err_mkdir[] = { 316 NFSERR_IO, 317 NFSERR_IO, 318 NFSERR_ACCES, 319 NFSERR_EXIST, 320 NFSERR_NOTDIR, 321 NFSERR_NOSPC, 322 NFSERR_ROFS, 323 NFSERR_NAMETOL, 324 NFSERR_DQUOT, 325 NFSERR_STALE, 326 NFSERR_BADHANDLE, 327 NFSERR_NOTSUPP, 328 NFSERR_SERVERFAULT, 329 0, 330 }; 331 332 static short nfsv3err_symlink[] = { 333 NFSERR_IO, 334 NFSERR_IO, 335 NFSERR_ACCES, 336 NFSERR_EXIST, 337 NFSERR_NOTDIR, 338 NFSERR_NOSPC, 339 NFSERR_ROFS, 340 NFSERR_NAMETOL, 341 NFSERR_DQUOT, 342 NFSERR_STALE, 343 NFSERR_BADHANDLE, 344 NFSERR_NOTSUPP, 345 NFSERR_SERVERFAULT, 346 0, 347 }; 348 349 static short nfsv3err_mknod[] = { 350 NFSERR_IO, 351 NFSERR_IO, 352 NFSERR_ACCES, 353 NFSERR_EXIST, 354 NFSERR_NOTDIR, 355 NFSERR_NOSPC, 356 NFSERR_ROFS, 357 NFSERR_NAMETOL, 358 NFSERR_DQUOT, 359 NFSERR_STALE, 360 NFSERR_BADHANDLE, 361 NFSERR_NOTSUPP, 362 NFSERR_SERVERFAULT, 363 NFSERR_BADTYPE, 364 0, 365 }; 366 367 static short nfsv3err_remove[] = { 368 NFSERR_IO, 369 NFSERR_NOENT, 370 NFSERR_IO, 371 NFSERR_ACCES, 372 NFSERR_NOTDIR, 373 NFSERR_ROFS, 374 NFSERR_NAMETOL, 375 NFSERR_STALE, 376 NFSERR_BADHANDLE, 377 NFSERR_SERVERFAULT, 378 0, 379 }; 380 381 static short nfsv3err_rmdir[] = { 382 NFSERR_IO, 383 NFSERR_NOENT, 384 NFSERR_IO, 385 NFSERR_ACCES, 386 NFSERR_EXIST, 387 NFSERR_NOTDIR, 388 NFSERR_INVAL, 389 NFSERR_ROFS, 390 NFSERR_NAMETOL, 391 NFSERR_NOTEMPTY, 392 NFSERR_STALE, 393 NFSERR_BADHANDLE, 394 NFSERR_NOTSUPP, 395 NFSERR_SERVERFAULT, 396 0, 397 }; 398 399 static short nfsv3err_rename[] = { 400 NFSERR_IO, 401 NFSERR_NOENT, 402 NFSERR_IO, 403 NFSERR_ACCES, 404 NFSERR_EXIST, 405 NFSERR_XDEV, 406 NFSERR_NOTDIR, 407 NFSERR_ISDIR, 408 NFSERR_INVAL, 409 NFSERR_NOSPC, 410 NFSERR_ROFS, 411 NFSERR_MLINK, 412 NFSERR_NAMETOL, 413 NFSERR_NOTEMPTY, 414 NFSERR_DQUOT, 415 NFSERR_STALE, 416 NFSERR_BADHANDLE, 417 NFSERR_NOTSUPP, 418 NFSERR_SERVERFAULT, 419 0, 420 }; 421 422 static short nfsv3err_link[] = { 423 NFSERR_IO, 424 NFSERR_IO, 425 NFSERR_ACCES, 426 NFSERR_EXIST, 427 NFSERR_XDEV, 428 NFSERR_NOTDIR, 429 NFSERR_INVAL, 430 NFSERR_NOSPC, 431 NFSERR_ROFS, 432 NFSERR_MLINK, 433 NFSERR_NAMETOL, 434 NFSERR_DQUOT, 435 NFSERR_STALE, 436 NFSERR_BADHANDLE, 437 NFSERR_NOTSUPP, 438 NFSERR_SERVERFAULT, 439 0, 440 }; 441 442 static short nfsv3err_readdir[] = { 443 NFSERR_IO, 444 NFSERR_IO, 445 NFSERR_ACCES, 446 NFSERR_NOTDIR, 447 NFSERR_STALE, 448 NFSERR_BADHANDLE, 449 NFSERR_BAD_COOKIE, 450 NFSERR_TOOSMALL, 451 NFSERR_SERVERFAULT, 452 0, 453 }; 454 455 static short nfsv3err_readdirplus[] = { 456 NFSERR_IO, 457 NFSERR_IO, 458 NFSERR_ACCES, 459 NFSERR_NOTDIR, 460 NFSERR_STALE, 461 NFSERR_BADHANDLE, 462 NFSERR_BAD_COOKIE, 463 NFSERR_NOTSUPP, 464 NFSERR_TOOSMALL, 465 NFSERR_SERVERFAULT, 466 0, 467 }; 468 469 static short nfsv3err_fsstat[] = { 470 NFSERR_IO, 471 NFSERR_IO, 472 NFSERR_STALE, 473 NFSERR_BADHANDLE, 474 NFSERR_SERVERFAULT, 475 0, 476 }; 477 478 static short nfsv3err_fsinfo[] = { 479 NFSERR_STALE, 480 NFSERR_STALE, 481 NFSERR_BADHANDLE, 482 NFSERR_SERVERFAULT, 483 0, 484 }; 485 486 static short nfsv3err_pathconf[] = { 487 NFSERR_STALE, 488 NFSERR_STALE, 489 NFSERR_BADHANDLE, 490 NFSERR_SERVERFAULT, 491 0, 492 }; 493 494 static short nfsv3err_commit[] = { 495 NFSERR_IO, 496 NFSERR_IO, 497 NFSERR_STALE, 498 NFSERR_BADHANDLE, 499 NFSERR_SERVERFAULT, 500 0, 501 }; 502 503 static short *nfsrv_v3errmap[] = { 504 nfsv3err_null, 505 nfsv3err_getattr, 506 nfsv3err_setattr, 507 nfsv3err_lookup, 508 nfsv3err_access, 509 nfsv3err_readlink, 510 nfsv3err_read, 511 nfsv3err_write, 512 nfsv3err_create, 513 nfsv3err_mkdir, 514 nfsv3err_symlink, 515 nfsv3err_mknod, 516 nfsv3err_remove, 517 nfsv3err_rmdir, 518 nfsv3err_rename, 519 nfsv3err_link, 520 nfsv3err_readdir, 521 nfsv3err_readdirplus, 522 nfsv3err_fsstat, 523 nfsv3err_fsinfo, 524 nfsv3err_pathconf, 525 nfsv3err_commit, 526 }; 527 528 extern struct nfsrtt nfsrtt; 529 extern time_t nqnfsstarttime; 530 extern int nqsrv_clockskew; 531 extern int nqsrv_writeslack; 532 extern int nqsrv_maxlease; 533 extern int nqnfs_piggy[NFS_NPROCS]; 534 extern nfstype nfsv2_type[9]; 535 extern nfstype nfsv3_type[9]; 536 extern struct nfsnodehashhead *nfsnodehashtbl; 537 extern u_long nfsnodehash; 538 539 LIST_HEAD(nfsnodehashhead, nfsnode); 540 u_long nfsdirhashmask; 541 542 int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 543 544 /* 545 * Create the header for an rpc request packet 546 * The hsiz is the size of the rest of the nfs request header. 547 * (just used to decide if a cluster is a good idea) 548 */ 549 struct mbuf * 550 nfsm_reqh(vp, procid, hsiz, bposp) 551 struct vnode *vp; 552 u_long procid; 553 int hsiz; 554 caddr_t *bposp; 555 { 556 register struct mbuf *mb; 557 register u_int32_t *tl; 558 register caddr_t bpos; 559 struct mbuf *mb2; 560 struct nfsmount *nmp; 561 int nqflag; 562 563 MGET(mb, M_WAIT, MT_DATA); 564 if (hsiz >= MINCLSIZE) 565 MCLGET(mb, M_WAIT); 566 mb->m_len = 0; 567 bpos = mtod(mb, caddr_t); 568 569 /* 570 * For NQNFS, add lease request. 571 */ 572 if (vp) { 573 nmp = VFSTONFS(vp->v_mount); 574 if (nmp->nm_flag & NFSMNT_NQNFS) { 575 nqflag = NQNFS_NEEDLEASE(vp, procid); 576 if (nqflag) { 577 nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED); 578 *tl++ = txdr_unsigned(nqflag); 579 *tl = txdr_unsigned(nmp->nm_leaseterm); 580 } else { 581 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 582 *tl = 0; 583 } 584 } 585 } 586 /* Finally, return values */ 587 *bposp = bpos; 588 return (mb); 589 } 590 591 /* 592 * Build the RPC header and fill in the authorization info. 593 * The authorization string argument is only used when the credentials 594 * come from outside of the kernel. 595 * Returns the head of the mbuf list. 596 */ 597 struct mbuf * 598 nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 599 verf_str, mrest, mrest_len, mbp, xidp) 600 register struct ucred *cr; 601 int nmflag; 602 int procid; 603 int auth_type; 604 int auth_len; 605 char *auth_str; 606 int verf_len; 607 char *verf_str; 608 struct mbuf *mrest; 609 int mrest_len; 610 struct mbuf **mbp; 611 u_int32_t *xidp; 612 { 613 register struct mbuf *mb; 614 register u_int32_t *tl; 615 register caddr_t bpos; 616 register int i; 617 struct mbuf *mreq, *mb2; 618 int siz, grpsiz, authsiz; 619 struct timeval tv; 620 static u_int32_t base; 621 622 authsiz = nfsm_rndup(auth_len); 623 MGETHDR(mb, M_WAIT, MT_DATA); 624 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 625 MCLGET(mb, M_WAIT); 626 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 627 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 628 } else { 629 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 630 } 631 mb->m_len = 0; 632 mreq = mb; 633 bpos = mtod(mb, caddr_t); 634 635 /* 636 * First the RPC header. 637 */ 638 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 639 640 /* 641 * derive initial xid from system time 642 * XXX time is invalid if root not yet mounted 643 */ 644 if (!base && (rootvp)) { 645 microtime(&tv); 646 base = tv.tv_sec << 12; 647 nfs_xid = base; 648 } 649 /* 650 * Skip zero xid if it should ever happen. 651 */ 652 if (++nfs_xid == 0) 653 nfs_xid++; 654 655 *tl++ = *xidp = txdr_unsigned(nfs_xid); 656 *tl++ = rpc_call; 657 *tl++ = rpc_vers; 658 if (nmflag & NFSMNT_NQNFS) { 659 *tl++ = txdr_unsigned(NQNFS_PROG); 660 *tl++ = txdr_unsigned(NQNFS_VER3); 661 } else { 662 *tl++ = txdr_unsigned(NFS_PROG); 663 if (nmflag & NFSMNT_NFSV3) 664 *tl++ = txdr_unsigned(NFS_VER3); 665 else 666 *tl++ = txdr_unsigned(NFS_VER2); 667 } 668 if (nmflag & NFSMNT_NFSV3) 669 *tl++ = txdr_unsigned(procid); 670 else 671 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 672 673 /* 674 * And then the authorization cred. 675 */ 676 *tl++ = txdr_unsigned(auth_type); 677 *tl = txdr_unsigned(authsiz); 678 switch (auth_type) { 679 case RPCAUTH_UNIX: 680 nfsm_build(tl, u_int32_t *, auth_len); 681 *tl++ = 0; /* stamp ?? */ 682 *tl++ = 0; /* NULL hostname */ 683 *tl++ = txdr_unsigned(cr->cr_uid); 684 *tl++ = txdr_unsigned(cr->cr_gid); 685 grpsiz = (auth_len >> 2) - 5; 686 *tl++ = txdr_unsigned(grpsiz); 687 for (i = 0; i < grpsiz; i++) 688 *tl++ = txdr_unsigned(cr->cr_groups[i]); 689 break; 690 case RPCAUTH_KERB4: 691 siz = auth_len; 692 while (siz > 0) { 693 if (M_TRAILINGSPACE(mb) == 0) { 694 MGET(mb2, M_WAIT, MT_DATA); 695 if (siz >= MINCLSIZE) 696 MCLGET(mb2, M_WAIT); 697 mb->m_next = mb2; 698 mb = mb2; 699 mb->m_len = 0; 700 bpos = mtod(mb, caddr_t); 701 } 702 i = min(siz, M_TRAILINGSPACE(mb)); 703 bcopy(auth_str, bpos, i); 704 mb->m_len += i; 705 auth_str += i; 706 bpos += i; 707 siz -= i; 708 } 709 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 710 for (i = 0; i < siz; i++) 711 *bpos++ = '\0'; 712 mb->m_len += siz; 713 } 714 break; 715 }; 716 717 /* 718 * And the verifier... 719 */ 720 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 721 if (verf_str) { 722 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 723 *tl = txdr_unsigned(verf_len); 724 siz = verf_len; 725 while (siz > 0) { 726 if (M_TRAILINGSPACE(mb) == 0) { 727 MGET(mb2, M_WAIT, MT_DATA); 728 if (siz >= MINCLSIZE) 729 MCLGET(mb2, M_WAIT); 730 mb->m_next = mb2; 731 mb = mb2; 732 mb->m_len = 0; 733 bpos = mtod(mb, caddr_t); 734 } 735 i = min(siz, M_TRAILINGSPACE(mb)); 736 bcopy(verf_str, bpos, i); 737 mb->m_len += i; 738 verf_str += i; 739 bpos += i; 740 siz -= i; 741 } 742 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 743 for (i = 0; i < siz; i++) 744 *bpos++ = '\0'; 745 mb->m_len += siz; 746 } 747 } else { 748 *tl++ = txdr_unsigned(RPCAUTH_NULL); 749 *tl = 0; 750 } 751 mb->m_next = mrest; 752 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 753 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 754 *mbp = mb; 755 return (mreq); 756 } 757 758 /* 759 * copies mbuf chain to the uio scatter/gather list 760 */ 761 int 762 nfsm_mbuftouio(mrep, uiop, siz, dpos) 763 struct mbuf **mrep; 764 register struct uio *uiop; 765 int siz; 766 caddr_t *dpos; 767 { 768 register char *mbufcp, *uiocp; 769 register int xfer, left, len; 770 register struct mbuf *mp; 771 long uiosiz, rem; 772 int error = 0; 773 774 mp = *mrep; 775 mbufcp = *dpos; 776 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 777 rem = nfsm_rndup(siz)-siz; 778 while (siz > 0) { 779 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 780 return (EFBIG); 781 left = uiop->uio_iov->iov_len; 782 uiocp = uiop->uio_iov->iov_base; 783 if (left > siz) 784 left = siz; 785 uiosiz = left; 786 while (left > 0) { 787 while (len == 0) { 788 mp = mp->m_next; 789 if (mp == NULL) 790 return (EBADRPC); 791 mbufcp = mtod(mp, caddr_t); 792 len = mp->m_len; 793 } 794 xfer = (left > len) ? len : left; 795 #ifdef notdef 796 /* Not Yet.. */ 797 if (uiop->uio_iov->iov_op != NULL) 798 (*(uiop->uio_iov->iov_op)) 799 (mbufcp, uiocp, xfer); 800 else 801 #endif 802 if (uiop->uio_segflg == UIO_SYSSPACE) 803 bcopy(mbufcp, uiocp, xfer); 804 else 805 copyout(mbufcp, uiocp, xfer); 806 left -= xfer; 807 len -= xfer; 808 mbufcp += xfer; 809 uiocp += xfer; 810 uiop->uio_offset += xfer; 811 uiop->uio_resid -= xfer; 812 } 813 if (uiop->uio_iov->iov_len <= siz) { 814 uiop->uio_iovcnt--; 815 uiop->uio_iov++; 816 } else { 817 uiop->uio_iov->iov_base += uiosiz; 818 uiop->uio_iov->iov_len -= uiosiz; 819 } 820 siz -= uiosiz; 821 } 822 *dpos = mbufcp; 823 *mrep = mp; 824 if (rem > 0) { 825 if (len < rem) 826 error = nfs_adv(mrep, dpos, rem, len); 827 else 828 *dpos += rem; 829 } 830 return (error); 831 } 832 833 /* 834 * copies a uio scatter/gather list to an mbuf chain. 835 * NOTE: can ony handle iovcnt == 1 836 */ 837 int 838 nfsm_uiotombuf(uiop, mq, siz, bpos) 839 register struct uio *uiop; 840 struct mbuf **mq; 841 int siz; 842 caddr_t *bpos; 843 { 844 register char *uiocp; 845 register struct mbuf *mp, *mp2; 846 register int xfer, left, mlen; 847 int uiosiz, clflg, rem; 848 char *cp; 849 850 #ifdef DIAGNOSTIC 851 if (uiop->uio_iovcnt != 1) 852 panic("nfsm_uiotombuf: iovcnt != 1"); 853 #endif 854 855 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 856 clflg = 1; 857 else 858 clflg = 0; 859 rem = nfsm_rndup(siz)-siz; 860 mp = mp2 = *mq; 861 while (siz > 0) { 862 left = uiop->uio_iov->iov_len; 863 uiocp = uiop->uio_iov->iov_base; 864 if (left > siz) 865 left = siz; 866 uiosiz = left; 867 while (left > 0) { 868 mlen = M_TRAILINGSPACE(mp); 869 if (mlen == 0) { 870 MGET(mp, M_WAIT, MT_DATA); 871 if (clflg) 872 MCLGET(mp, M_WAIT); 873 mp->m_len = 0; 874 mp2->m_next = mp; 875 mp2 = mp; 876 mlen = M_TRAILINGSPACE(mp); 877 } 878 xfer = (left > mlen) ? mlen : left; 879 #ifdef notdef 880 /* Not Yet.. */ 881 if (uiop->uio_iov->iov_op != NULL) 882 (*(uiop->uio_iov->iov_op)) 883 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 884 else 885 #endif 886 if (uiop->uio_segflg == UIO_SYSSPACE) 887 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 888 else 889 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 890 mp->m_len += xfer; 891 left -= xfer; 892 uiocp += xfer; 893 uiop->uio_offset += xfer; 894 uiop->uio_resid -= xfer; 895 } 896 uiop->uio_iov->iov_base += uiosiz; 897 uiop->uio_iov->iov_len -= uiosiz; 898 siz -= uiosiz; 899 } 900 if (rem > 0) { 901 if (rem > M_TRAILINGSPACE(mp)) { 902 MGET(mp, M_WAIT, MT_DATA); 903 mp->m_len = 0; 904 mp2->m_next = mp; 905 } 906 cp = mtod(mp, caddr_t)+mp->m_len; 907 for (left = 0; left < rem; left++) 908 *cp++ = '\0'; 909 mp->m_len += rem; 910 *bpos = cp; 911 } else 912 *bpos = mtod(mp, caddr_t)+mp->m_len; 913 *mq = mp; 914 return (0); 915 } 916 917 /* 918 * Get at least "siz" bytes of correctly aligned data. 919 * When called the mbuf pointers are not necessarily correct, 920 * dsosp points to what ought to be in m_data and left contains 921 * what ought to be in m_len. 922 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 923 * cases. (The macros use the vars. dpos and dpos2) 924 */ 925 int 926 nfsm_disct(mdp, dposp, siz, left, cp2) 927 struct mbuf **mdp; 928 caddr_t *dposp; 929 int siz; 930 int left; 931 caddr_t *cp2; 932 { 933 register struct mbuf *m1, *m2; 934 struct mbuf *havebuf = NULL; 935 caddr_t src = *dposp; 936 caddr_t dst; 937 int len; 938 939 #ifdef DEBUG 940 if (left < 0) 941 panic("nfsm_disct: left < 0"); 942 #endif 943 m1 = *mdp; 944 /* 945 * Skip through the mbuf chain looking for an mbuf with 946 * some data. If the first mbuf found has enough data 947 * and it is correctly aligned return it. 948 */ 949 while (left == 0) { 950 havebuf = m1; 951 *mdp = m1 = m1->m_next; 952 if (m1 == NULL) 953 return (EBADRPC); 954 src = mtod(m1, caddr_t); 955 left = m1->m_len; 956 /* 957 * If we start a new mbuf and it is big enough 958 * and correctly aligned just return it, don't 959 * do any pull up. 960 */ 961 if (left >= siz && nfsm_aligned(src)) { 962 *cp2 = src; 963 *dposp = src + siz; 964 return (0); 965 } 966 } 967 if (m1->m_flags & M_EXT) { 968 if (havebuf) { 969 /* If the first mbuf with data has external data 970 * and there is a previous empty mbuf use it 971 * to move the data into. 972 */ 973 m2 = m1; 974 *mdp = m1 = havebuf; 975 if (m1->m_flags & M_EXT) { 976 MEXTREMOVE(m1); 977 } 978 } else { 979 /* 980 * If the first mbuf has a external data 981 * and there is no previous empty mbuf 982 * allocate a new mbuf and move the external 983 * data to the new mbuf. Also make the first 984 * mbuf look empty. 985 */ 986 m2 = m_get(M_WAIT, MT_DATA); 987 m2->m_ext = m1->m_ext; 988 m2->m_data = src; 989 m2->m_len = left; 990 MCLADDREFERENCE(m1, m2); 991 MEXTREMOVE(m1); 992 m2->m_next = m1->m_next; 993 m1->m_next = m2; 994 } 995 m1->m_len = 0; 996 dst = m1->m_dat; 997 } else { 998 /* 999 * If the first mbuf has no external data 1000 * move the data to the front of the mbuf. 1001 */ 1002 if ((dst = m1->m_dat) != src) 1003 ovbcopy(src, dst, left); 1004 dst += left; 1005 m1->m_len = left; 1006 m2 = m1->m_next; 1007 } 1008 m1->m_flags &= ~M_PKTHDR; 1009 *cp2 = m1->m_data = m1->m_dat; /* data is at beginning of buffer */ 1010 *dposp = mtod(m1, caddr_t) + siz; 1011 /* 1012 * Loop through mbufs pulling data up into first mbuf until 1013 * the first mbuf is full or there is no more data to 1014 * pullup. 1015 */ 1016 while ((len = (MLEN - m1->m_len)) != 0 && m2) { 1017 if ((len = min(len, m2->m_len)) != 0) 1018 bcopy(m2->m_data, dst, len); 1019 m1->m_len += len; 1020 dst += len; 1021 m2->m_data += len; 1022 m2->m_len -= len; 1023 m2 = m2->m_next; 1024 } 1025 if (m1->m_len < siz) 1026 return (EBADRPC); 1027 return (0); 1028 } 1029 1030 /* 1031 * Advance the position in the mbuf chain. 1032 */ 1033 int 1034 nfs_adv(mdp, dposp, offs, left) 1035 struct mbuf **mdp; 1036 caddr_t *dposp; 1037 int offs; 1038 int left; 1039 { 1040 register struct mbuf *m; 1041 register int s; 1042 1043 m = *mdp; 1044 s = left; 1045 while (s < offs) { 1046 offs -= s; 1047 m = m->m_next; 1048 if (m == NULL) 1049 return (EBADRPC); 1050 s = m->m_len; 1051 } 1052 *mdp = m; 1053 *dposp = mtod(m, caddr_t)+offs; 1054 return (0); 1055 } 1056 1057 /* 1058 * Copy a string into mbufs for the hard cases... 1059 */ 1060 int 1061 nfsm_strtmbuf(mb, bpos, cp, siz) 1062 struct mbuf **mb; 1063 char **bpos; 1064 const char *cp; 1065 long siz; 1066 { 1067 register struct mbuf *m1 = NULL, *m2; 1068 long left, xfer, len, tlen; 1069 u_int32_t *tl; 1070 int putsize; 1071 1072 putsize = 1; 1073 m2 = *mb; 1074 left = M_TRAILINGSPACE(m2); 1075 if (left > 0) { 1076 tl = ((u_int32_t *)(*bpos)); 1077 *tl++ = txdr_unsigned(siz); 1078 putsize = 0; 1079 left -= NFSX_UNSIGNED; 1080 m2->m_len += NFSX_UNSIGNED; 1081 if (left > 0) { 1082 bcopy(cp, (caddr_t) tl, left); 1083 siz -= left; 1084 cp += left; 1085 m2->m_len += left; 1086 left = 0; 1087 } 1088 } 1089 /* Loop around adding mbufs */ 1090 while (siz > 0) { 1091 MGET(m1, M_WAIT, MT_DATA); 1092 if (siz > MLEN) 1093 MCLGET(m1, M_WAIT); 1094 m1->m_len = NFSMSIZ(m1); 1095 m2->m_next = m1; 1096 m2 = m1; 1097 tl = mtod(m1, u_int32_t *); 1098 tlen = 0; 1099 if (putsize) { 1100 *tl++ = txdr_unsigned(siz); 1101 m1->m_len -= NFSX_UNSIGNED; 1102 tlen = NFSX_UNSIGNED; 1103 putsize = 0; 1104 } 1105 if (siz < m1->m_len) { 1106 len = nfsm_rndup(siz); 1107 xfer = siz; 1108 if (xfer < len) 1109 *(tl+(xfer>>2)) = 0; 1110 } else { 1111 xfer = len = m1->m_len; 1112 } 1113 bcopy(cp, (caddr_t) tl, xfer); 1114 m1->m_len = len+tlen; 1115 siz -= xfer; 1116 cp += xfer; 1117 } 1118 *mb = m1; 1119 *bpos = mtod(m1, caddr_t)+m1->m_len; 1120 return (0); 1121 } 1122 1123 u_long 1124 nfs_dirhash(off) 1125 off_t off; 1126 { 1127 int i; 1128 char *cp = (char *)&off; 1129 u_long sum = 0L; 1130 1131 for (i = 0 ; i < sizeof (off); i++) 1132 sum += *cp++; 1133 1134 return sum; 1135 } 1136 1137 1138 struct nfsdircache * 1139 nfs_lookdircache(vp, off, en, blkno, alloc) 1140 struct vnode *vp; 1141 off_t off; 1142 daddr_t blkno; 1143 int en, alloc; 1144 { 1145 struct nfsnode *np = VTONFS(vp); 1146 struct nfsdirhashhead *ndhp; 1147 struct nfsdircache *ndp, *first; 1148 1149 if (!np->n_dircache) { 1150 np->n_dircachesize = 0; 1151 np->n_dircache = 1152 hashinit(NFS_DIRHASHSIZ, M_NFSDIROFF, &nfsdirhashmask); 1153 TAILQ_INIT(&np->n_dirchain); 1154 } 1155 1156 ndhp = NFSDIRHASH(np, off); 1157 for (ndp = ndhp->lh_first; ndp; ndp = ndp->dc_hash.le_next) 1158 if (ndp->dc_cookie == off) 1159 break; 1160 1161 if (!alloc || ndp) 1162 return ndp; 1163 MALLOC(ndp, struct nfsdircache *, sizeof (*ndp), M_NFSDIROFF, M_WAITOK); 1164 ndp->dc_cookie = off; 1165 1166 /* 1167 * If the entry number is 0, we are at the start of a new block, so 1168 * allocate a new blocknumber. 1169 */ 1170 if (en == 0) 1171 ndp->dc_blkno = np->n_dblkno++; 1172 else 1173 ndp->dc_blkno = blkno; 1174 ndp->dc_entry = en; 1175 1176 /* 1177 * If the maximum directory cookie cache size has been reached 1178 * for this node, take one off the front. The idea is that 1179 * directories are typically read front-to-back once, so that 1180 * the oldest entries can be thrown away without much performance 1181 * loss. 1182 */ 1183 if (np->n_dircachesize == NFS_MAXDIRCACHE) { 1184 first = np->n_dirchain.tqh_first; 1185 TAILQ_REMOVE(&np->n_dirchain, first, dc_chain); 1186 LIST_REMOVE(first, dc_hash); 1187 FREE(first, M_NFSDIROFF); 1188 } else 1189 np->n_dircachesize++; 1190 1191 LIST_INSERT_HEAD(ndhp, ndp, dc_hash); 1192 TAILQ_INSERT_TAIL(&np->n_dirchain, ndp, dc_chain); 1193 return ndp; 1194 } 1195 1196 void 1197 nfs_invaldircache(vp) 1198 struct vnode *vp; 1199 { 1200 struct nfsnode *np = VTONFS(vp); 1201 struct nfsdircache *ndp = NULL; 1202 1203 #ifdef DIAGNOSTIC 1204 if (vp->v_type != VDIR) 1205 panic("nfs: invaldircache: not dir"); 1206 #endif 1207 1208 if (!np->n_dircache) 1209 return; 1210 1211 while ((ndp = np->n_dirchain.tqh_first)) { 1212 TAILQ_REMOVE(&np->n_dirchain, ndp, dc_chain); 1213 LIST_REMOVE(ndp, dc_hash); 1214 FREE(ndp, M_NFSDIROFF); 1215 } 1216 1217 np->n_dblkno = 0; 1218 np->n_dircachesize = 0; 1219 } 1220 1221 /* 1222 * Called once before VFS init to initialize shared and 1223 * server-specific data structures. 1224 */ 1225 void 1226 nfs_init() 1227 { 1228 1229 #if !defined(alpha) && defined(DIAGNOSTIC) 1230 /* 1231 * Check to see if major data structures haven't bloated. 1232 */ 1233 if (sizeof (struct nfsnode) > NFS_NODEALLOC) { 1234 printf("struct nfsnode bloated (> %dbytes)\n", NFS_NODEALLOC); 1235 printf("Try reducing NFS_SMALLFH\n"); 1236 } 1237 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1238 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1239 printf("Try reducing NFS_UIDHASHSIZ\n"); 1240 } 1241 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1242 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1243 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1244 } 1245 #endif 1246 1247 nfsrtt.pos = 0; 1248 rpc_vers = txdr_unsigned(RPC_VER2); 1249 rpc_call = txdr_unsigned(RPC_CALL); 1250 rpc_reply = txdr_unsigned(RPC_REPLY); 1251 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1252 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1253 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1254 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1255 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1256 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1257 nfs_prog = txdr_unsigned(NFS_PROG); 1258 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1259 nfs_true = txdr_unsigned(TRUE); 1260 nfs_false = txdr_unsigned(FALSE); 1261 nfs_xdrneg1 = txdr_unsigned(-1); 1262 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1263 if (nfs_ticks < 1) 1264 nfs_ticks = 1; 1265 #ifdef NFSSERVER 1266 nfsrv_init(0); /* Init server data structures */ 1267 nfsrv_initcache(); /* Init the server request cache */ 1268 #endif /* NFSSERVER */ 1269 1270 /* 1271 * Initialize the nqnfs data structures. 1272 */ 1273 if (nqnfsstarttime == 0) { 1274 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1275 + nqsrv_clockskew + nqsrv_writeslack; 1276 NQLOADNOVRAM(nqnfsstarttime); 1277 CIRCLEQ_INIT(&nqtimerhead); 1278 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); 1279 } 1280 1281 /* 1282 * Initialize reply list and start timer 1283 */ 1284 TAILQ_INIT(&nfs_reqq); 1285 nfs_timer(NULL); 1286 } 1287 1288 #ifdef NFS 1289 /* 1290 * Called once at VFS init to initialize client-specific data structures. 1291 */ 1292 void 1293 nfs_vfs_init() 1294 { 1295 register int i; 1296 1297 /* Ensure async daemons disabled */ 1298 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1299 nfs_iodwant[i] = (struct proc *)0; 1300 nfs_iodmount[i] = (struct nfsmount *)0; 1301 } 1302 nfs_nhinit(); /* Init the nfsnode table */ 1303 } 1304 1305 /* 1306 * Attribute cache routines. 1307 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1308 * that are on the mbuf list 1309 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1310 * error otherwise 1311 */ 1312 1313 /* 1314 * Load the attribute cache (that lives in the nfsnode entry) with 1315 * the values on the mbuf list and 1316 * Iff vap not NULL 1317 * copy the attributes to *vaper 1318 */ 1319 int 1320 nfsm_loadattrcache(vpp, mdp, dposp, vaper) 1321 struct vnode **vpp; 1322 struct mbuf **mdp; 1323 caddr_t *dposp; 1324 struct vattr *vaper; 1325 { 1326 register int32_t t1; 1327 caddr_t cp2; 1328 int error = 0; 1329 struct mbuf *md; 1330 int v3 = NFS_ISV3(*vpp); 1331 1332 md = *mdp; 1333 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1334 error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2); 1335 if (error) 1336 return (error); 1337 return nfs_loadattrcache(vpp, (struct nfs_fattr *)cp2, vaper); 1338 } 1339 1340 int 1341 nfs_loadattrcache(vpp, fp, vaper) 1342 struct vnode **vpp; 1343 struct nfs_fattr *fp; 1344 struct vattr *vaper; 1345 { 1346 register struct vnode *vp = *vpp; 1347 register struct vattr *vap; 1348 int v3 = NFS_ISV3(vp); 1349 enum vtype vtyp; 1350 u_short vmode; 1351 struct timespec mtime; 1352 struct vnode *nvp; 1353 int32_t rdev; 1354 register struct nfsnode *np; 1355 extern int (**spec_nfsv2nodeop_p) __P((void *)); 1356 1357 if (v3) { 1358 vtyp = nfsv3tov_type(fp->fa_type); 1359 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1360 rdev = makedev(fxdr_unsigned(u_char, fp->fa3_rdev.specdata1), 1361 fxdr_unsigned(u_char, fp->fa3_rdev.specdata2)); 1362 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1363 } else { 1364 vtyp = nfsv2tov_type(fp->fa_type); 1365 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1366 if (vtyp == VNON || vtyp == VREG) 1367 vtyp = IFTOVT(vmode); 1368 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1369 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1370 1371 /* 1372 * Really ugly NFSv2 kludge. 1373 */ 1374 if (vtyp == VCHR && rdev == 0xffffffff) 1375 vtyp = VFIFO; 1376 } 1377 1378 /* 1379 * If v_type == VNON it is a new node, so fill in the v_type, 1380 * n_mtime fields. Check to see if it represents a special 1381 * device, and if so, check for a possible alias. Once the 1382 * correct vnode has been obtained, fill in the rest of the 1383 * information. 1384 */ 1385 np = VTONFS(vp); 1386 if (vp->v_type != vtyp) { 1387 vp->v_type = vtyp; 1388 if (vp->v_type == VFIFO) { 1389 #ifndef FIFO 1390 return (EOPNOTSUPP); 1391 #else 1392 extern int (**fifo_nfsv2nodeop_p) __P((void *)); 1393 vp->v_op = fifo_nfsv2nodeop_p; 1394 #endif /* FIFO */ 1395 } 1396 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1397 vp->v_op = spec_nfsv2nodeop_p; 1398 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1399 if (nvp) { 1400 /* 1401 * Discard unneeded vnode, but save its nfsnode. 1402 * Since the nfsnode does not have a lock, its 1403 * vnode lock has to be carried over. 1404 */ 1405 #ifdef Lite2_integrated 1406 nvp->v_vnlock = vp->v_vnlock; 1407 vp->v_vnlock = NULL; 1408 #endif 1409 nvp->v_data = vp->v_data; 1410 vp->v_data = NULL; 1411 vp->v_op = spec_vnodeop_p; 1412 vrele(vp); 1413 vgone(vp); 1414 /* 1415 * Reinitialize aliased node. 1416 */ 1417 np->n_vnode = nvp; 1418 *vpp = vp = nvp; 1419 } 1420 } 1421 np->n_mtime = mtime.tv_sec; 1422 } 1423 vap = &np->n_vattr; 1424 vap->va_type = vtyp; 1425 vap->va_mode = vmode & ALLPERMS; 1426 vap->va_rdev = (dev_t)rdev; 1427 vap->va_mtime = mtime; 1428 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1429 if (v3) { 1430 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1431 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1432 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1433 fxdr_hyper(&fp->fa3_size, &vap->va_size); 1434 if (vtyp == VDIR) 1435 vap->va_blocksize = NFS_DIRFRAGSIZ; 1436 else 1437 vap->va_blocksize = NFS_FABLKSIZE; 1438 fxdr_hyper(&fp->fa3_used, &vap->va_bytes); 1439 vap->va_fileid = fxdr_unsigned(int32_t, 1440 fp->fa3_fileid.nfsuquad[1]); 1441 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1442 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1443 vap->va_flags = 0; 1444 vap->va_filerev = 0; 1445 } else { 1446 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1447 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1448 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1449 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1450 if (vtyp == VDIR) 1451 vap->va_blocksize = NFS_DIRFRAGSIZ; 1452 else 1453 vap->va_blocksize = 1454 fxdr_unsigned(int32_t, fp->fa2_blocksize); 1455 vap->va_bytes = fxdr_unsigned(int32_t, fp->fa2_blocks) 1456 * NFS_FABLKSIZE; 1457 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1458 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1459 vap->va_flags = 0; 1460 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1461 fp->fa2_ctime.nfsv2_sec); 1462 vap->va_ctime.tv_nsec = 0; 1463 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1464 vap->va_filerev = 0; 1465 } 1466 if (vap->va_size != np->n_size) { 1467 if (vap->va_type == VREG) { 1468 if (np->n_flag & NMODIFIED) { 1469 if (vap->va_size < np->n_size) 1470 vap->va_size = np->n_size; 1471 else 1472 np->n_size = vap->va_size; 1473 } else 1474 np->n_size = vap->va_size; 1475 vnode_pager_setsize(vp, np->n_size); 1476 } else 1477 np->n_size = vap->va_size; 1478 } 1479 np->n_attrstamp = time.tv_sec; 1480 if (vaper != NULL) { 1481 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1482 if (np->n_flag & NCHG) { 1483 if (np->n_flag & NACC) 1484 vaper->va_atime = np->n_atim; 1485 if (np->n_flag & NUPD) 1486 vaper->va_mtime = np->n_mtim; 1487 } 1488 } 1489 return (0); 1490 } 1491 1492 /* 1493 * Check the time stamp 1494 * If the cache is valid, copy contents to *vap and return 0 1495 * otherwise return an error 1496 */ 1497 int 1498 nfs_getattrcache(vp, vaper) 1499 register struct vnode *vp; 1500 struct vattr *vaper; 1501 { 1502 register struct nfsnode *np = VTONFS(vp); 1503 register struct vattr *vap; 1504 1505 if ((time.tv_sec - np->n_attrstamp) >= NFS_ATTRTIMEO(np)) { 1506 nfsstats.attrcache_misses++; 1507 return (ENOENT); 1508 } 1509 nfsstats.attrcache_hits++; 1510 vap = &np->n_vattr; 1511 if (vap->va_size != np->n_size) { 1512 if (vap->va_type == VREG) { 1513 if (np->n_flag & NMODIFIED) { 1514 if (vap->va_size < np->n_size) 1515 vap->va_size = np->n_size; 1516 else 1517 np->n_size = vap->va_size; 1518 } else 1519 np->n_size = vap->va_size; 1520 vnode_pager_setsize(vp, np->n_size); 1521 } else 1522 np->n_size = vap->va_size; 1523 } 1524 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1525 if (np->n_flag & NCHG) { 1526 if (np->n_flag & NACC) 1527 vaper->va_atime = np->n_atim; 1528 if (np->n_flag & NUPD) 1529 vaper->va_mtime = np->n_mtim; 1530 } 1531 return (0); 1532 } 1533 #endif /* NFS */ 1534 1535 /* 1536 * Set up nameidata for a lookup() call and do it. 1537 * 1538 * If pubflag is set, this call is done for a lookup operation on the 1539 * public filehandle. In that case we allow crossing mountpoints and 1540 * absolute pathnames. However, the caller is expected to check that 1541 * the lookup result is within the public fs, and deny access if 1542 * it is not. 1543 */ 1544 int 1545 nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1546 register struct nameidata *ndp; 1547 fhandle_t *fhp; 1548 int len; 1549 struct nfssvc_sock *slp; 1550 struct mbuf *nam; 1551 struct mbuf **mdp; 1552 caddr_t *dposp; 1553 struct vnode **retdirp; 1554 struct proc *p; 1555 int kerbflag, pubflag; 1556 { 1557 register int i, rem; 1558 register struct mbuf *md; 1559 register char *fromcp, *tocp, *cp; 1560 struct iovec aiov; 1561 struct uio auio; 1562 struct vnode *dp; 1563 int error, rdonly, linklen; 1564 struct componentname *cnp = &ndp->ni_cnd; 1565 1566 *retdirp = (struct vnode *)0; 1567 MALLOC(cnp->cn_pnbuf, char *, len + 1, M_NAMEI, M_WAITOK); 1568 /* 1569 * Copy the name from the mbuf list to ndp->ni_pnbuf 1570 * and set the various ndp fields appropriately. 1571 */ 1572 fromcp = *dposp; 1573 tocp = cnp->cn_pnbuf; 1574 md = *mdp; 1575 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1576 for (i = 0; i < len; i++) { 1577 while (rem == 0) { 1578 md = md->m_next; 1579 if (md == NULL) { 1580 error = EBADRPC; 1581 goto out; 1582 } 1583 fromcp = mtod(md, caddr_t); 1584 rem = md->m_len; 1585 } 1586 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1587 error = EACCES; 1588 goto out; 1589 } 1590 *tocp++ = *fromcp++; 1591 rem--; 1592 } 1593 *tocp = '\0'; 1594 *mdp = md; 1595 *dposp = fromcp; 1596 len = nfsm_rndup(len)-len; 1597 if (len > 0) { 1598 if (rem >= len) 1599 *dposp += len; 1600 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1601 goto out; 1602 } 1603 1604 /* 1605 * Extract and set starting directory. 1606 */ 1607 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1608 nam, &rdonly, kerbflag, pubflag); 1609 if (error) 1610 goto out; 1611 if (dp->v_type != VDIR) { 1612 vrele(dp); 1613 error = ENOTDIR; 1614 goto out; 1615 } 1616 1617 if (rdonly) 1618 cnp->cn_flags |= RDONLY; 1619 1620 *retdirp = dp; 1621 1622 if (pubflag) { 1623 /* 1624 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1625 * and the 'native path' indicator. 1626 */ 1627 MALLOC(cp, char *, MAXPATHLEN, M_NAMEI, M_WAITOK); 1628 fromcp = cnp->cn_pnbuf; 1629 tocp = cp; 1630 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1631 switch ((unsigned char)*fromcp) { 1632 case WEBNFS_NATIVE_CHAR: 1633 /* 1634 * 'Native' path for us is the same 1635 * as a path according to the NFS spec, 1636 * just skip the escape char. 1637 */ 1638 fromcp++; 1639 break; 1640 /* 1641 * More may be added in the future, range 0x80-0xff 1642 */ 1643 default: 1644 error = EIO; 1645 FREE(cp, M_NAMEI); 1646 goto out; 1647 } 1648 } 1649 /* 1650 * Translate the '%' escapes, URL-style. 1651 */ 1652 while (*fromcp != '\0') { 1653 if (*fromcp == WEBNFS_ESC_CHAR) { 1654 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1655 fromcp++; 1656 *tocp++ = HEXSTRTOI(fromcp); 1657 fromcp += 2; 1658 continue; 1659 } else { 1660 error = ENOENT; 1661 FREE(cp, M_NAMEI); 1662 goto out; 1663 } 1664 } else 1665 *tocp++ = *fromcp++; 1666 } 1667 *tocp = '\0'; 1668 FREE(cnp->cn_pnbuf, M_NAMEI); 1669 cnp->cn_pnbuf = cp; 1670 } 1671 1672 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1673 ndp->ni_segflg = UIO_SYSSPACE; 1674 1675 if (pubflag) { 1676 ndp->ni_rootdir = rootvnode; 1677 ndp->ni_loopcnt = 0; 1678 if (cnp->cn_pnbuf[0] == '/') 1679 dp = rootvnode; 1680 } else { 1681 cnp->cn_flags |= NOCROSSMOUNT; 1682 } 1683 1684 cnp->cn_proc = p; 1685 VREF(dp); 1686 1687 for (;;) { 1688 cnp->cn_nameptr = cnp->cn_pnbuf; 1689 ndp->ni_startdir = dp; 1690 /* 1691 * And call lookup() to do the real work 1692 */ 1693 error = lookup(ndp); 1694 if (error) 1695 break; 1696 /* 1697 * Check for encountering a symbolic link 1698 */ 1699 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1700 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1701 cnp->cn_flags |= HASBUF; 1702 return (0); 1703 } 1704 break; 1705 } else { 1706 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1707 VOP_UNLOCK(ndp->ni_dvp); 1708 if (!pubflag) { 1709 vrele(ndp->ni_dvp); 1710 vput(ndp->ni_vp); 1711 ndp->ni_vp = NULL; 1712 error = EINVAL; 1713 break; 1714 } 1715 1716 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1717 error = ELOOP; 1718 break; 1719 } 1720 if (ndp->ni_pathlen > 1) 1721 MALLOC(cp, char *, MAXPATHLEN, M_NAMEI, M_WAITOK); 1722 else 1723 cp = cnp->cn_pnbuf; 1724 aiov.iov_base = cp; 1725 aiov.iov_len = MAXPATHLEN; 1726 auio.uio_iov = &aiov; 1727 auio.uio_iovcnt = 1; 1728 auio.uio_offset = 0; 1729 auio.uio_rw = UIO_READ; 1730 auio.uio_segflg = UIO_SYSSPACE; 1731 auio.uio_procp = (struct proc *)0; 1732 auio.uio_resid = MAXPATHLEN; 1733 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1734 if (error) { 1735 badlink: 1736 if (ndp->ni_pathlen > 1) 1737 FREE(cp, M_NAMEI); 1738 break; 1739 } 1740 linklen = MAXPATHLEN - auio.uio_resid; 1741 if (linklen == 0) { 1742 error = ENOENT; 1743 goto badlink; 1744 } 1745 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1746 error = ENAMETOOLONG; 1747 goto badlink; 1748 } 1749 if (ndp->ni_pathlen > 1) { 1750 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 1751 FREE(cnp->cn_pnbuf, M_NAMEI); 1752 cnp->cn_pnbuf = cp; 1753 } else 1754 cnp->cn_pnbuf[linklen] = '\0'; 1755 ndp->ni_pathlen += linklen; 1756 vput(ndp->ni_vp); 1757 dp = ndp->ni_dvp; 1758 /* 1759 * Check if root directory should replace current directory. 1760 */ 1761 if (cnp->cn_pnbuf[0] == '/') { 1762 vrele(dp); 1763 dp = ndp->ni_rootdir; 1764 VREF(dp); 1765 } 1766 } 1767 } 1768 out: 1769 FREE(cnp->cn_pnbuf, M_NAMEI); 1770 return (error); 1771 } 1772 1773 /* 1774 * A fiddled version of m_adj() that ensures null fill to a long 1775 * boundary and only trims off the back end 1776 */ 1777 void 1778 nfsm_adj(mp, len, nul) 1779 struct mbuf *mp; 1780 register int len; 1781 int nul; 1782 { 1783 register struct mbuf *m; 1784 register int count, i; 1785 register char *cp; 1786 1787 /* 1788 * Trim from tail. Scan the mbuf chain, 1789 * calculating its length and finding the last mbuf. 1790 * If the adjustment only affects this mbuf, then just 1791 * adjust and return. Otherwise, rescan and truncate 1792 * after the remaining size. 1793 */ 1794 count = 0; 1795 m = mp; 1796 for (;;) { 1797 count += m->m_len; 1798 if (m->m_next == (struct mbuf *)0) 1799 break; 1800 m = m->m_next; 1801 } 1802 if (m->m_len > len) { 1803 m->m_len -= len; 1804 if (nul > 0) { 1805 cp = mtod(m, caddr_t)+m->m_len-nul; 1806 for (i = 0; i < nul; i++) 1807 *cp++ = '\0'; 1808 } 1809 return; 1810 } 1811 count -= len; 1812 if (count < 0) 1813 count = 0; 1814 /* 1815 * Correct length for chain is "count". 1816 * Find the mbuf with last data, adjust its length, 1817 * and toss data from remaining mbufs on chain. 1818 */ 1819 for (m = mp; m; m = m->m_next) { 1820 if (m->m_len >= count) { 1821 m->m_len = count; 1822 if (nul > 0) { 1823 cp = mtod(m, caddr_t)+m->m_len-nul; 1824 for (i = 0; i < nul; i++) 1825 *cp++ = '\0'; 1826 } 1827 break; 1828 } 1829 count -= m->m_len; 1830 } 1831 for (m = m->m_next;m;m = m->m_next) 1832 m->m_len = 0; 1833 } 1834 1835 /* 1836 * Make these functions instead of macros, so that the kernel text size 1837 * doesn't get too big... 1838 */ 1839 void 1840 nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1841 struct nfsrv_descript *nfsd; 1842 int before_ret; 1843 register struct vattr *before_vap; 1844 int after_ret; 1845 struct vattr *after_vap; 1846 struct mbuf **mbp; 1847 char **bposp; 1848 { 1849 register struct mbuf *mb = *mbp, *mb2; 1850 register char *bpos = *bposp; 1851 register u_int32_t *tl; 1852 1853 if (before_ret) { 1854 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1855 *tl = nfs_false; 1856 } else { 1857 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 1858 *tl++ = nfs_true; 1859 txdr_hyper(&(before_vap->va_size), tl); 1860 tl += 2; 1861 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1862 tl += 2; 1863 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1864 } 1865 *bposp = bpos; 1866 *mbp = mb; 1867 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1868 } 1869 1870 void 1871 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1872 struct nfsrv_descript *nfsd; 1873 int after_ret; 1874 struct vattr *after_vap; 1875 struct mbuf **mbp; 1876 char **bposp; 1877 { 1878 register struct mbuf *mb = *mbp, *mb2; 1879 register char *bpos = *bposp; 1880 register u_int32_t *tl; 1881 register struct nfs_fattr *fp; 1882 1883 if (after_ret) { 1884 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1885 *tl = nfs_false; 1886 } else { 1887 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 1888 *tl++ = nfs_true; 1889 fp = (struct nfs_fattr *)tl; 1890 nfsm_srvfattr(nfsd, after_vap, fp); 1891 } 1892 *mbp = mb; 1893 *bposp = bpos; 1894 } 1895 1896 void 1897 nfsm_srvfattr(nfsd, vap, fp) 1898 register struct nfsrv_descript *nfsd; 1899 register struct vattr *vap; 1900 register struct nfs_fattr *fp; 1901 { 1902 1903 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1904 fp->fa_uid = txdr_unsigned(vap->va_uid); 1905 fp->fa_gid = txdr_unsigned(vap->va_gid); 1906 if (nfsd->nd_flag & ND_NFSV3) { 1907 fp->fa_type = vtonfsv3_type(vap->va_type); 1908 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1909 txdr_hyper(&vap->va_size, &fp->fa3_size); 1910 txdr_hyper(&vap->va_bytes, &fp->fa3_used); 1911 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 1912 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 1913 fp->fa3_fsid.nfsuquad[0] = 0; 1914 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1915 fp->fa3_fileid.nfsuquad[0] = 0; 1916 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1917 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1918 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1919 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1920 } else { 1921 fp->fa_type = vtonfsv2_type(vap->va_type); 1922 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1923 fp->fa2_size = txdr_unsigned(vap->va_size); 1924 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1925 if (vap->va_type == VFIFO) 1926 fp->fa2_rdev = 0xffffffff; 1927 else 1928 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1929 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1930 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1931 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1932 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1933 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1934 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1935 } 1936 } 1937 1938 /* 1939 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1940 * - look up fsid in mount list (if not found ret error) 1941 * - get vp and export rights by calling VFS_FHTOVP() 1942 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1943 * - if not lockflag unlock it with VOP_UNLOCK() 1944 */ 1945 int 1946 nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 1947 fhandle_t *fhp; 1948 int lockflag; 1949 struct vnode **vpp; 1950 struct ucred *cred; 1951 struct nfssvc_sock *slp; 1952 struct mbuf *nam; 1953 int *rdonlyp; 1954 int kerbflag; 1955 { 1956 #ifdef Lite2_integrated 1957 struct proc *p = curproc; /* XXX */ 1958 #endif 1959 register struct mount *mp; 1960 register int i; 1961 struct ucred *credanon; 1962 int error, exflags; 1963 struct sockaddr_in *saddr; 1964 1965 *vpp = (struct vnode *)0; 1966 1967 if (nfs_ispublicfh(fhp)) { 1968 if (!pubflag || !nfs_pub.np_valid) 1969 return (ESTALE); 1970 fhp = &nfs_pub.np_handle; 1971 } 1972 1973 #ifdef Lite2_integrated 1974 mp = vfs_getvfs(&fhp->fh_fsid); 1975 #else 1976 mp = getvfs(&fhp->fh_fsid); 1977 #endif 1978 if (!mp) 1979 return (ESTALE); 1980 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon); 1981 if (error) 1982 return (error); 1983 1984 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 1985 saddr = mtod(nam, struct sockaddr_in *); 1986 if (saddr->sin_family == AF_INET && 1987 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 1988 vput(*vpp); 1989 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1990 } 1991 } 1992 /* 1993 * Check/setup credentials. 1994 */ 1995 if (exflags & MNT_EXKERB) { 1996 if (!kerbflag) { 1997 vput(*vpp); 1998 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1999 } 2000 } else if (kerbflag) { 2001 vput(*vpp); 2002 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2003 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 2004 cred->cr_uid = credanon->cr_uid; 2005 cred->cr_gid = credanon->cr_gid; 2006 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 2007 cred->cr_groups[i] = credanon->cr_groups[i]; 2008 cred->cr_ngroups = i; 2009 } 2010 if (exflags & MNT_EXRDONLY) 2011 *rdonlyp = 1; 2012 else 2013 *rdonlyp = 0; 2014 if (!lockflag) 2015 #ifdef Lite2_integrated 2016 VOP_UNLOCK(*vpp, 0, p); 2017 #else 2018 VOP_UNLOCK(*vpp); 2019 #endif 2020 return (0); 2021 } 2022 2023 /* 2024 * WebNFS: check if a filehandle is a public filehandle. For v3, this 2025 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 2026 * transformed this to all zeroes in both cases, so check for it. 2027 */ 2028 int 2029 nfs_ispublicfh(fhp) 2030 fhandle_t *fhp; 2031 { 2032 char *cp = (char *)fhp; 2033 int i; 2034 2035 for (i = 0; i < NFSX_V3FH; i++) 2036 if (*cp++ != 0) 2037 return (FALSE); 2038 return (TRUE); 2039 } 2040 2041 /* 2042 * This function compares two net addresses by family and returns TRUE 2043 * if they are the same host. 2044 * If there is any doubt, return FALSE. 2045 * The AF_INET family is handled as a special case so that address mbufs 2046 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 2047 */ 2048 int 2049 netaddr_match(family, haddr, nam) 2050 int family; 2051 union nethostaddr *haddr; 2052 struct mbuf *nam; 2053 { 2054 register struct sockaddr_in *inetaddr; 2055 2056 switch (family) { 2057 case AF_INET: 2058 inetaddr = mtod(nam, struct sockaddr_in *); 2059 if (inetaddr->sin_family == AF_INET && 2060 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 2061 return (1); 2062 break; 2063 #ifdef ISO 2064 case AF_ISO: 2065 { 2066 register struct sockaddr_iso *isoaddr1, *isoaddr2; 2067 2068 isoaddr1 = mtod(nam, struct sockaddr_iso *); 2069 isoaddr2 = mtod(haddr->had_nam, struct sockaddr_iso *); 2070 if (isoaddr1->siso_family == AF_ISO && 2071 isoaddr1->siso_nlen > 0 && 2072 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 2073 SAME_ISOADDR(isoaddr1, isoaddr2)) 2074 return (1); 2075 break; 2076 } 2077 #endif /* ISO */ 2078 default: 2079 break; 2080 }; 2081 return (0); 2082 } 2083 2084 2085 /* 2086 * The write verifier has changed (probably due to a server reboot), so all 2087 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2088 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2089 * flag. Once done the new write verifier can be set for the mount point. 2090 */ 2091 void 2092 nfs_clearcommit(mp) 2093 struct mount *mp; 2094 { 2095 register struct vnode *vp, *nvp; 2096 register struct buf *bp, *nbp; 2097 int s; 2098 2099 s = splbio(); 2100 loop: 2101 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2102 if (vp->v_mount != mp) /* Paranoia */ 2103 goto loop; 2104 nvp = vp->v_mntvnodes.le_next; 2105 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2106 nbp = bp->b_vnbufs.le_next; 2107 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2108 == (B_DELWRI | B_NEEDCOMMIT)) 2109 bp->b_flags &= ~B_NEEDCOMMIT; 2110 } 2111 } 2112 splx(s); 2113 } 2114 2115 /* 2116 * Map errnos to NFS error numbers. For Version 3 also filter out error 2117 * numbers not specified for the associated procedure. 2118 */ 2119 int 2120 nfsrv_errmap(nd, err) 2121 struct nfsrv_descript *nd; 2122 register int err; 2123 { 2124 register short *defaulterrp, *errp; 2125 2126 if (nd->nd_flag & ND_NFSV3) { 2127 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2128 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2129 while (*++errp) { 2130 if (*errp == err) 2131 return (err); 2132 else if (*errp > err) 2133 break; 2134 } 2135 return ((int)*defaulterrp); 2136 } else 2137 return (err & 0xffff); 2138 } 2139 if (err <= ELAST) 2140 return ((int)nfsrv_v2errmap[err - 1]); 2141 return (NFSERR_IO); 2142 } 2143 2144 /* 2145 * Sort the group list in increasing numerical order. 2146 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 2147 * that used to be here.) 2148 */ 2149 void 2150 nfsrvw_sort(list, num) 2151 register gid_t *list; 2152 register int num; 2153 { 2154 register int i, j; 2155 gid_t v; 2156 2157 /* Insertion sort. */ 2158 for (i = 1; i < num; i++) { 2159 v = list[i]; 2160 /* find correct slot for value v, moving others up */ 2161 for (j = i; --j >= 0 && v < list[j];) 2162 list[j + 1] = list[j]; 2163 list[j + 1] = v; 2164 } 2165 } 2166 2167 /* 2168 * copy credentials making sure that the result can be compared with bcmp(). 2169 */ 2170 void 2171 nfsrv_setcred(incred, outcred) 2172 register struct ucred *incred, *outcred; 2173 { 2174 register int i; 2175 2176 bzero((caddr_t)outcred, sizeof (struct ucred)); 2177 outcred->cr_ref = 1; 2178 outcred->cr_uid = incred->cr_uid; 2179 outcred->cr_gid = incred->cr_gid; 2180 outcred->cr_ngroups = incred->cr_ngroups; 2181 for (i = 0; i < incred->cr_ngroups; i++) 2182 outcred->cr_groups[i] = incred->cr_groups[i]; 2183 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 2184 } 2185 2186 /* 2187 * Heuristic to see if the server XDR encodes directory cookies or not. 2188 * it is not supposed to, but a lot of servers may do this. Also, since 2189 * most/all servers will implement V2 as well, it is expected that they 2190 * may return just 32 bits worth of cookie information, so we need to 2191 * find out in which 32 bits this information is available. We do this 2192 * to avoid trouble with emulated binaries that can't handle 64 bit 2193 * directory offsets. 2194 */ 2195 2196 void 2197 nfs_cookieheuristic(vp, flagp, p, cred) 2198 struct vnode *vp; 2199 int *flagp; 2200 struct proc *p; 2201 struct ucred *cred; 2202 { 2203 struct uio auio; 2204 struct iovec aiov; 2205 caddr_t buf, cp; 2206 struct dirent *dp; 2207 off_t *cookies, *cop; 2208 int error, eof, nc, len; 2209 2210 nc = NFS_DIRFRAGSIZ / 16; 2211 MALLOC(buf, caddr_t, NFS_DIRFRAGSIZ, M_TEMP, M_WAITOK); 2212 MALLOC(cookies, off_t *, nc * sizeof (off_t), M_TEMP, M_WAITOK); 2213 2214 aiov.iov_base = buf; 2215 aiov.iov_len = NFS_DIRFRAGSIZ; 2216 auio.uio_iov = &aiov; 2217 auio.uio_iovcnt = 1; 2218 auio.uio_rw = UIO_READ; 2219 auio.uio_segflg = UIO_SYSSPACE; 2220 auio.uio_procp = p; 2221 auio.uio_resid = NFS_DIRFRAGSIZ; 2222 auio.uio_offset = 0; 2223 2224 error = VOP_READDIR(vp, &auio, cred, &eof, cookies, nc); 2225 2226 len = NFS_DIRFRAGSIZ - auio.uio_resid; 2227 if (error || len == 0) { 2228 FREE(buf, M_TEMP); 2229 FREE(cookies, M_TEMP); 2230 return; 2231 } 2232 2233 /* 2234 * Find the first valid entry and look at its offset cookie. 2235 */ 2236 2237 cp = buf; 2238 for (cop = cookies; len > 0; len -= dp->d_reclen) { 2239 dp = (struct dirent *)cp; 2240 if (dp->d_fileno != 0 && len >= dp->d_reclen) { 2241 if ((*cop >> 32) != 0 && (*cop & 0xffffffffLL) == 0) { 2242 *flagp |= NFSMNT_SWAPCOOKIE; 2243 nfs_invaldircache(vp); 2244 nfs_vinvalbuf(vp, 0, cred, p, 1); 2245 } 2246 break; 2247 } 2248 cop++; 2249 cp += dp->d_reclen; 2250 } 2251 2252 FREE(buf, M_TEMP); 2253 FREE(cookies, M_TEMP); 2254 } 2255
Indexes created Thu Oct 02 14:10:14 GMT 2025