nfs_subs.c revision 1.26
1 /* $NetBSD: nfs_subs.c,v 1.26 1996/03/13 00:44:17 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 59 #include <vm/vm.h> 60 61 #include <nfs/rpcv2.h> 62 #include <nfs/nfsproto.h> 63 #include <nfs/nfsnode.h> 64 #include <nfs/nfs.h> 65 #include <nfs/xdr_subs.h> 66 #include <nfs/nfsm_subs.h> 67 #include <nfs/nfsmount.h> 68 #include <nfs/nqnfs.h> 69 #include <nfs/nfsrtt.h> 70 #include <nfs/nfs_var.h> 71 72 #include <miscfs/specfs/specdev.h> 73 74 #include <vm/vm.h> 75 76 #include <netinet/in.h> 77 #ifdef ISO 78 #include <netiso/iso.h> 79 #endif 80 81 /* 82 * Data items converted to xdr at startup, since they are constant 83 * This is kinda hokey, but may save a little time doing byte swaps 84 */ 85 u_int32_t nfs_xdrneg1; 86 u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 87 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 88 rpc_auth_kerb; 89 u_int32_t nfs_prog, nqnfs_prog, nfs_true, nfs_false; 90 91 /* And other global data */ 92 static u_int32_t nfs_xid = 0; 93 nfstype nfsv2_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON, 94 NFCHR, NFNON }; 95 nfstype nfsv3_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFSOCK, 96 NFFIFO, NFNON }; 97 enum vtype nv2tov_type[8] = { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON }; 98 enum vtype nv3tov_type[8]={ VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO }; 99 int nfs_ticks; 100 101 /* 102 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 103 */ 104 int nfsv3_procid[NFS_NPROCS] = { 105 NFSPROC_NULL, 106 NFSPROC_GETATTR, 107 NFSPROC_SETATTR, 108 NFSPROC_NOOP, 109 NFSPROC_LOOKUP, 110 NFSPROC_READLINK, 111 NFSPROC_READ, 112 NFSPROC_NOOP, 113 NFSPROC_WRITE, 114 NFSPROC_CREATE, 115 NFSPROC_REMOVE, 116 NFSPROC_RENAME, 117 NFSPROC_LINK, 118 NFSPROC_SYMLINK, 119 NFSPROC_MKDIR, 120 NFSPROC_RMDIR, 121 NFSPROC_READDIR, 122 NFSPROC_FSSTAT, 123 NFSPROC_NOOP, 124 NFSPROC_NOOP, 125 NFSPROC_NOOP, 126 NFSPROC_NOOP, 127 NFSPROC_NOOP, 128 NFSPROC_NOOP, 129 NFSPROC_NOOP, 130 NFSPROC_NOOP 131 }; 132 133 /* 134 * and the reverse mapping from generic to Version 2 procedure numbers 135 */ 136 int nfsv2_procid[NFS_NPROCS] = { 137 NFSV2PROC_NULL, 138 NFSV2PROC_GETATTR, 139 NFSV2PROC_SETATTR, 140 NFSV2PROC_LOOKUP, 141 NFSV2PROC_NOOP, 142 NFSV2PROC_READLINK, 143 NFSV2PROC_READ, 144 NFSV2PROC_WRITE, 145 NFSV2PROC_CREATE, 146 NFSV2PROC_MKDIR, 147 NFSV2PROC_SYMLINK, 148 NFSV2PROC_CREATE, 149 NFSV2PROC_REMOVE, 150 NFSV2PROC_RMDIR, 151 NFSV2PROC_RENAME, 152 NFSV2PROC_LINK, 153 NFSV2PROC_READDIR, 154 NFSV2PROC_NOOP, 155 NFSV2PROC_STATFS, 156 NFSV2PROC_NOOP, 157 NFSV2PROC_NOOP, 158 NFSV2PROC_NOOP, 159 NFSV2PROC_NOOP, 160 NFSV2PROC_NOOP, 161 NFSV2PROC_NOOP, 162 NFSV2PROC_NOOP, 163 }; 164 165 /* 166 * Maps errno values to nfs error numbers. 167 * Use NFSERR_IO as the catch all for ones not specifically defined in 168 * RFC 1094. 169 */ 170 static u_char nfsrv_v2errmap[ELAST] = { 171 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 172 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 173 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 174 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 175 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 176 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 177 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 178 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 179 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 180 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 181 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 182 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 183 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 184 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 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, 188 }; 189 190 /* 191 * Maps errno values to nfs error numbers. 192 * Although it is not obvious whether or not NFS clients really care if 193 * a returned error value is in the specified list for the procedure, the 194 * safest thing to do is filter them appropriately. For Version 2, the 195 * X/Open XNFS document is the only specification that defines error values 196 * for each RPC (The RFC simply lists all possible error values for all RPCs), 197 * so I have decided to not do this for Version 2. 198 * The first entry is the default error return and the rest are the valid 199 * errors for that RPC in increasing numeric order. 200 */ 201 static short nfsv3err_null[] = { 202 0, 203 0, 204 }; 205 206 static short nfsv3err_getattr[] = { 207 NFSERR_IO, 208 NFSERR_IO, 209 NFSERR_STALE, 210 NFSERR_BADHANDLE, 211 NFSERR_SERVERFAULT, 212 0, 213 }; 214 215 static short nfsv3err_setattr[] = { 216 NFSERR_IO, 217 NFSERR_PERM, 218 NFSERR_IO, 219 NFSERR_ACCES, 220 NFSERR_INVAL, 221 NFSERR_NOSPC, 222 NFSERR_ROFS, 223 NFSERR_DQUOT, 224 NFSERR_STALE, 225 NFSERR_BADHANDLE, 226 NFSERR_NOT_SYNC, 227 NFSERR_SERVERFAULT, 228 0, 229 }; 230 231 static short nfsv3err_lookup[] = { 232 NFSERR_IO, 233 NFSERR_NOENT, 234 NFSERR_IO, 235 NFSERR_ACCES, 236 NFSERR_NOTDIR, 237 NFSERR_NAMETOL, 238 NFSERR_STALE, 239 NFSERR_BADHANDLE, 240 NFSERR_SERVERFAULT, 241 0, 242 }; 243 244 static short nfsv3err_access[] = { 245 NFSERR_IO, 246 NFSERR_IO, 247 NFSERR_STALE, 248 NFSERR_BADHANDLE, 249 NFSERR_SERVERFAULT, 250 0, 251 }; 252 253 static short nfsv3err_readlink[] = { 254 NFSERR_IO, 255 NFSERR_IO, 256 NFSERR_ACCES, 257 NFSERR_INVAL, 258 NFSERR_STALE, 259 NFSERR_BADHANDLE, 260 NFSERR_NOTSUPP, 261 NFSERR_SERVERFAULT, 262 0, 263 }; 264 265 static short nfsv3err_read[] = { 266 NFSERR_IO, 267 NFSERR_IO, 268 NFSERR_NXIO, 269 NFSERR_ACCES, 270 NFSERR_INVAL, 271 NFSERR_STALE, 272 NFSERR_BADHANDLE, 273 NFSERR_SERVERFAULT, 274 0, 275 }; 276 277 static short nfsv3err_write[] = { 278 NFSERR_IO, 279 NFSERR_IO, 280 NFSERR_ACCES, 281 NFSERR_INVAL, 282 NFSERR_FBIG, 283 NFSERR_NOSPC, 284 NFSERR_ROFS, 285 NFSERR_DQUOT, 286 NFSERR_STALE, 287 NFSERR_BADHANDLE, 288 NFSERR_SERVERFAULT, 289 0, 290 }; 291 292 static short nfsv3err_create[] = { 293 NFSERR_IO, 294 NFSERR_IO, 295 NFSERR_ACCES, 296 NFSERR_EXIST, 297 NFSERR_NOTDIR, 298 NFSERR_NOSPC, 299 NFSERR_ROFS, 300 NFSERR_NAMETOL, 301 NFSERR_DQUOT, 302 NFSERR_STALE, 303 NFSERR_BADHANDLE, 304 NFSERR_NOTSUPP, 305 NFSERR_SERVERFAULT, 306 0, 307 }; 308 309 static short nfsv3err_mkdir[] = { 310 NFSERR_IO, 311 NFSERR_IO, 312 NFSERR_ACCES, 313 NFSERR_EXIST, 314 NFSERR_NOTDIR, 315 NFSERR_NOSPC, 316 NFSERR_ROFS, 317 NFSERR_NAMETOL, 318 NFSERR_DQUOT, 319 NFSERR_STALE, 320 NFSERR_BADHANDLE, 321 NFSERR_NOTSUPP, 322 NFSERR_SERVERFAULT, 323 0, 324 }; 325 326 static short nfsv3err_symlink[] = { 327 NFSERR_IO, 328 NFSERR_IO, 329 NFSERR_ACCES, 330 NFSERR_EXIST, 331 NFSERR_NOTDIR, 332 NFSERR_NOSPC, 333 NFSERR_ROFS, 334 NFSERR_NAMETOL, 335 NFSERR_DQUOT, 336 NFSERR_STALE, 337 NFSERR_BADHANDLE, 338 NFSERR_NOTSUPP, 339 NFSERR_SERVERFAULT, 340 0, 341 }; 342 343 static short nfsv3err_mknod[] = { 344 NFSERR_IO, 345 NFSERR_IO, 346 NFSERR_ACCES, 347 NFSERR_EXIST, 348 NFSERR_NOTDIR, 349 NFSERR_NOSPC, 350 NFSERR_ROFS, 351 NFSERR_NAMETOL, 352 NFSERR_DQUOT, 353 NFSERR_STALE, 354 NFSERR_BADHANDLE, 355 NFSERR_NOTSUPP, 356 NFSERR_SERVERFAULT, 357 NFSERR_BADTYPE, 358 0, 359 }; 360 361 static short nfsv3err_remove[] = { 362 NFSERR_IO, 363 NFSERR_NOENT, 364 NFSERR_IO, 365 NFSERR_ACCES, 366 NFSERR_NOTDIR, 367 NFSERR_ROFS, 368 NFSERR_NAMETOL, 369 NFSERR_STALE, 370 NFSERR_BADHANDLE, 371 NFSERR_SERVERFAULT, 372 0, 373 }; 374 375 static short nfsv3err_rmdir[] = { 376 NFSERR_IO, 377 NFSERR_NOENT, 378 NFSERR_IO, 379 NFSERR_ACCES, 380 NFSERR_EXIST, 381 NFSERR_NOTDIR, 382 NFSERR_INVAL, 383 NFSERR_ROFS, 384 NFSERR_NAMETOL, 385 NFSERR_NOTEMPTY, 386 NFSERR_STALE, 387 NFSERR_BADHANDLE, 388 NFSERR_NOTSUPP, 389 NFSERR_SERVERFAULT, 390 0, 391 }; 392 393 static short nfsv3err_rename[] = { 394 NFSERR_IO, 395 NFSERR_NOENT, 396 NFSERR_IO, 397 NFSERR_ACCES, 398 NFSERR_EXIST, 399 NFSERR_XDEV, 400 NFSERR_NOTDIR, 401 NFSERR_ISDIR, 402 NFSERR_INVAL, 403 NFSERR_NOSPC, 404 NFSERR_ROFS, 405 NFSERR_MLINK, 406 NFSERR_NAMETOL, 407 NFSERR_NOTEMPTY, 408 NFSERR_DQUOT, 409 NFSERR_STALE, 410 NFSERR_BADHANDLE, 411 NFSERR_NOTSUPP, 412 NFSERR_SERVERFAULT, 413 0, 414 }; 415 416 static short nfsv3err_link[] = { 417 NFSERR_IO, 418 NFSERR_IO, 419 NFSERR_ACCES, 420 NFSERR_EXIST, 421 NFSERR_XDEV, 422 NFSERR_NOTDIR, 423 NFSERR_INVAL, 424 NFSERR_NOSPC, 425 NFSERR_ROFS, 426 NFSERR_MLINK, 427 NFSERR_NAMETOL, 428 NFSERR_DQUOT, 429 NFSERR_STALE, 430 NFSERR_BADHANDLE, 431 NFSERR_NOTSUPP, 432 NFSERR_SERVERFAULT, 433 0, 434 }; 435 436 static short nfsv3err_readdir[] = { 437 NFSERR_IO, 438 NFSERR_IO, 439 NFSERR_ACCES, 440 NFSERR_NOTDIR, 441 NFSERR_STALE, 442 NFSERR_BADHANDLE, 443 NFSERR_BAD_COOKIE, 444 NFSERR_TOOSMALL, 445 NFSERR_SERVERFAULT, 446 0, 447 }; 448 449 static short nfsv3err_readdirplus[] = { 450 NFSERR_IO, 451 NFSERR_IO, 452 NFSERR_ACCES, 453 NFSERR_NOTDIR, 454 NFSERR_STALE, 455 NFSERR_BADHANDLE, 456 NFSERR_BAD_COOKIE, 457 NFSERR_NOTSUPP, 458 NFSERR_TOOSMALL, 459 NFSERR_SERVERFAULT, 460 0, 461 }; 462 463 static short nfsv3err_fsstat[] = { 464 NFSERR_IO, 465 NFSERR_IO, 466 NFSERR_STALE, 467 NFSERR_BADHANDLE, 468 NFSERR_SERVERFAULT, 469 0, 470 }; 471 472 static short nfsv3err_fsinfo[] = { 473 NFSERR_STALE, 474 NFSERR_STALE, 475 NFSERR_BADHANDLE, 476 NFSERR_SERVERFAULT, 477 0, 478 }; 479 480 static short nfsv3err_pathconf[] = { 481 NFSERR_STALE, 482 NFSERR_STALE, 483 NFSERR_BADHANDLE, 484 NFSERR_SERVERFAULT, 485 0, 486 }; 487 488 static short nfsv3err_commit[] = { 489 NFSERR_IO, 490 NFSERR_IO, 491 NFSERR_STALE, 492 NFSERR_BADHANDLE, 493 NFSERR_SERVERFAULT, 494 0, 495 }; 496 497 static short *nfsrv_v3errmap[] = { 498 nfsv3err_null, 499 nfsv3err_getattr, 500 nfsv3err_setattr, 501 nfsv3err_lookup, 502 nfsv3err_access, 503 nfsv3err_readlink, 504 nfsv3err_read, 505 nfsv3err_write, 506 nfsv3err_create, 507 nfsv3err_mkdir, 508 nfsv3err_symlink, 509 nfsv3err_mknod, 510 nfsv3err_remove, 511 nfsv3err_rmdir, 512 nfsv3err_rename, 513 nfsv3err_link, 514 nfsv3err_readdir, 515 nfsv3err_readdirplus, 516 nfsv3err_fsstat, 517 nfsv3err_fsinfo, 518 nfsv3err_pathconf, 519 nfsv3err_commit, 520 }; 521 522 extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 523 extern struct nfsrtt nfsrtt; 524 extern time_t nqnfsstarttime; 525 extern int nqsrv_clockskew; 526 extern int nqsrv_writeslack; 527 extern int nqsrv_maxlease; 528 extern struct nfsstats nfsstats; 529 extern int nqnfs_piggy[NFS_NPROCS]; 530 extern nfstype nfsv2_type[9]; 531 extern nfstype nfsv3_type[9]; 532 extern struct nfsnodehashhead *nfsnodehashtbl; 533 extern u_long nfsnodehash; 534 535 LIST_HEAD(nfsnodehashhead, nfsnode); 536 537 /* 538 * Create the header for an rpc request packet 539 * The hsiz is the size of the rest of the nfs request header. 540 * (just used to decide if a cluster is a good idea) 541 */ 542 struct mbuf * 543 nfsm_reqh(vp, procid, hsiz, bposp) 544 struct vnode *vp; 545 u_long procid; 546 int hsiz; 547 caddr_t *bposp; 548 { 549 register struct mbuf *mb; 550 register u_int32_t *tl; 551 register caddr_t bpos; 552 struct mbuf *mb2; 553 struct nfsmount *nmp; 554 int nqflag; 555 556 MGET(mb, M_WAIT, MT_DATA); 557 if (hsiz >= MINCLSIZE) 558 MCLGET(mb, M_WAIT); 559 mb->m_len = 0; 560 bpos = mtod(mb, caddr_t); 561 562 /* 563 * For NQNFS, add lease request. 564 */ 565 if (vp) { 566 nmp = VFSTONFS(vp->v_mount); 567 if (nmp->nm_flag & NFSMNT_NQNFS) { 568 nqflag = NQNFS_NEEDLEASE(vp, procid); 569 if (nqflag) { 570 nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED); 571 *tl++ = txdr_unsigned(nqflag); 572 *tl = txdr_unsigned(nmp->nm_leaseterm); 573 } else { 574 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 575 *tl = 0; 576 } 577 } 578 } 579 /* Finally, return values */ 580 *bposp = bpos; 581 return (mb); 582 } 583 584 /* 585 * Build the RPC header and fill in the authorization info. 586 * The authorization string argument is only used when the credentials 587 * come from outside of the kernel. 588 * Returns the head of the mbuf list. 589 */ 590 struct mbuf * 591 nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 592 verf_str, mrest, mrest_len, mbp, xidp) 593 register struct ucred *cr; 594 int nmflag; 595 int procid; 596 int auth_type; 597 int auth_len; 598 char *auth_str; 599 int verf_len; 600 char *verf_str; 601 struct mbuf *mrest; 602 int mrest_len; 603 struct mbuf **mbp; 604 u_int32_t *xidp; 605 { 606 register struct mbuf *mb; 607 register u_int32_t *tl; 608 register caddr_t bpos; 609 register int i; 610 struct mbuf *mreq, *mb2; 611 int siz, grpsiz, authsiz; 612 613 authsiz = nfsm_rndup(auth_len); 614 MGETHDR(mb, M_WAIT, MT_DATA); 615 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 616 MCLGET(mb, M_WAIT); 617 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 618 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 619 } else { 620 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 621 } 622 mb->m_len = 0; 623 mreq = mb; 624 bpos = mtod(mb, caddr_t); 625 626 /* 627 * First the RPC header. 628 */ 629 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 630 if (++nfs_xid == 0) 631 nfs_xid++; 632 *tl++ = *xidp = txdr_unsigned(nfs_xid); 633 *tl++ = rpc_call; 634 *tl++ = rpc_vers; 635 if (nmflag & NFSMNT_NQNFS) { 636 *tl++ = txdr_unsigned(NQNFS_PROG); 637 *tl++ = txdr_unsigned(NQNFS_VER3); 638 } else { 639 *tl++ = txdr_unsigned(NFS_PROG); 640 if (nmflag & NFSMNT_NFSV3) 641 *tl++ = txdr_unsigned(NFS_VER3); 642 else 643 *tl++ = txdr_unsigned(NFS_VER2); 644 } 645 if (nmflag & NFSMNT_NFSV3) 646 *tl++ = txdr_unsigned(procid); 647 else 648 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 649 650 /* 651 * And then the authorization cred. 652 */ 653 *tl++ = txdr_unsigned(auth_type); 654 *tl = txdr_unsigned(authsiz); 655 switch (auth_type) { 656 case RPCAUTH_UNIX: 657 nfsm_build(tl, u_int32_t *, auth_len); 658 *tl++ = 0; /* stamp ?? */ 659 *tl++ = 0; /* NULL hostname */ 660 *tl++ = txdr_unsigned(cr->cr_uid); 661 *tl++ = txdr_unsigned(cr->cr_gid); 662 grpsiz = (auth_len >> 2) - 5; 663 *tl++ = txdr_unsigned(grpsiz); 664 for (i = 0; i < grpsiz; i++) 665 *tl++ = txdr_unsigned(cr->cr_groups[i]); 666 break; 667 case RPCAUTH_KERB4: 668 siz = auth_len; 669 while (siz > 0) { 670 if (M_TRAILINGSPACE(mb) == 0) { 671 MGET(mb2, M_WAIT, MT_DATA); 672 if (siz >= MINCLSIZE) 673 MCLGET(mb2, M_WAIT); 674 mb->m_next = mb2; 675 mb = mb2; 676 mb->m_len = 0; 677 bpos = mtod(mb, caddr_t); 678 } 679 i = min(siz, M_TRAILINGSPACE(mb)); 680 bcopy(auth_str, bpos, i); 681 mb->m_len += i; 682 auth_str += i; 683 bpos += i; 684 siz -= i; 685 } 686 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 687 for (i = 0; i < siz; i++) 688 *bpos++ = '\0'; 689 mb->m_len += siz; 690 } 691 break; 692 }; 693 694 /* 695 * And the verifier... 696 */ 697 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 698 if (verf_str) { 699 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 700 *tl = txdr_unsigned(verf_len); 701 siz = verf_len; 702 while (siz > 0) { 703 if (M_TRAILINGSPACE(mb) == 0) { 704 MGET(mb2, M_WAIT, MT_DATA); 705 if (siz >= MINCLSIZE) 706 MCLGET(mb2, M_WAIT); 707 mb->m_next = mb2; 708 mb = mb2; 709 mb->m_len = 0; 710 bpos = mtod(mb, caddr_t); 711 } 712 i = min(siz, M_TRAILINGSPACE(mb)); 713 bcopy(verf_str, bpos, i); 714 mb->m_len += i; 715 verf_str += i; 716 bpos += i; 717 siz -= i; 718 } 719 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 720 for (i = 0; i < siz; i++) 721 *bpos++ = '\0'; 722 mb->m_len += siz; 723 } 724 } else { 725 *tl++ = txdr_unsigned(RPCAUTH_NULL); 726 *tl = 0; 727 } 728 mb->m_next = mrest; 729 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 730 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 731 *mbp = mb; 732 return (mreq); 733 } 734 735 /* 736 * copies mbuf chain to the uio scatter/gather list 737 */ 738 int 739 nfsm_mbuftouio(mrep, uiop, siz, dpos) 740 struct mbuf **mrep; 741 register struct uio *uiop; 742 int siz; 743 caddr_t *dpos; 744 { 745 register char *mbufcp, *uiocp; 746 register int xfer, left, len; 747 register struct mbuf *mp; 748 long uiosiz, rem; 749 int error = 0; 750 751 mp = *mrep; 752 mbufcp = *dpos; 753 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 754 rem = nfsm_rndup(siz)-siz; 755 while (siz > 0) { 756 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 757 return (EFBIG); 758 left = uiop->uio_iov->iov_len; 759 uiocp = uiop->uio_iov->iov_base; 760 if (left > siz) 761 left = siz; 762 uiosiz = left; 763 while (left > 0) { 764 while (len == 0) { 765 mp = mp->m_next; 766 if (mp == NULL) 767 return (EBADRPC); 768 mbufcp = mtod(mp, caddr_t); 769 len = mp->m_len; 770 } 771 xfer = (left > len) ? len : left; 772 #ifdef notdef 773 /* Not Yet.. */ 774 if (uiop->uio_iov->iov_op != NULL) 775 (*(uiop->uio_iov->iov_op)) 776 (mbufcp, uiocp, xfer); 777 else 778 #endif 779 if (uiop->uio_segflg == UIO_SYSSPACE) 780 bcopy(mbufcp, uiocp, xfer); 781 else 782 copyout(mbufcp, uiocp, xfer); 783 left -= xfer; 784 len -= xfer; 785 mbufcp += xfer; 786 uiocp += xfer; 787 uiop->uio_offset += xfer; 788 uiop->uio_resid -= xfer; 789 } 790 if (uiop->uio_iov->iov_len <= siz) { 791 uiop->uio_iovcnt--; 792 uiop->uio_iov++; 793 } else { 794 uiop->uio_iov->iov_base += uiosiz; 795 uiop->uio_iov->iov_len -= uiosiz; 796 } 797 siz -= uiosiz; 798 } 799 *dpos = mbufcp; 800 *mrep = mp; 801 if (rem > 0) { 802 if (len < rem) 803 error = nfs_adv(mrep, dpos, rem, len); 804 else 805 *dpos += rem; 806 } 807 return (error); 808 } 809 810 /* 811 * copies a uio scatter/gather list to an mbuf chain... 812 */ 813 int 814 nfsm_uiotombuf(uiop, mq, siz, bpos) 815 register struct uio *uiop; 816 struct mbuf **mq; 817 int siz; 818 caddr_t *bpos; 819 { 820 register char *uiocp; 821 register struct mbuf *mp, *mp2; 822 register int xfer, left, mlen; 823 int uiosiz, clflg, rem; 824 char *cp; 825 826 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 827 clflg = 1; 828 else 829 clflg = 0; 830 rem = nfsm_rndup(siz)-siz; 831 mp = mp2 = *mq; 832 while (siz > 0) { 833 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 834 return (EINVAL); 835 left = uiop->uio_iov->iov_len; 836 uiocp = uiop->uio_iov->iov_base; 837 if (left > siz) 838 left = siz; 839 uiosiz = left; 840 while (left > 0) { 841 mlen = M_TRAILINGSPACE(mp); 842 if (mlen == 0) { 843 MGET(mp, M_WAIT, MT_DATA); 844 if (clflg) 845 MCLGET(mp, M_WAIT); 846 mp->m_len = 0; 847 mp2->m_next = mp; 848 mp2 = mp; 849 mlen = M_TRAILINGSPACE(mp); 850 } 851 xfer = (left > mlen) ? mlen : left; 852 #ifdef notdef 853 /* Not Yet.. */ 854 if (uiop->uio_iov->iov_op != NULL) 855 (*(uiop->uio_iov->iov_op)) 856 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 857 else 858 #endif 859 if (uiop->uio_segflg == UIO_SYSSPACE) 860 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 861 else 862 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 863 mp->m_len += xfer; 864 left -= xfer; 865 uiocp += xfer; 866 uiop->uio_offset += xfer; 867 uiop->uio_resid -= xfer; 868 } 869 if (uiop->uio_iov->iov_len <= siz) { 870 uiop->uio_iovcnt--; 871 uiop->uio_iov++; 872 } else { 873 uiop->uio_iov->iov_base += uiosiz; 874 uiop->uio_iov->iov_len -= uiosiz; 875 } 876 siz -= uiosiz; 877 } 878 if (rem > 0) { 879 if (rem > M_TRAILINGSPACE(mp)) { 880 MGET(mp, M_WAIT, MT_DATA); 881 mp->m_len = 0; 882 mp2->m_next = mp; 883 } 884 cp = mtod(mp, caddr_t)+mp->m_len; 885 for (left = 0; left < rem; left++) 886 *cp++ = '\0'; 887 mp->m_len += rem; 888 *bpos = cp; 889 } else 890 *bpos = mtod(mp, caddr_t)+mp->m_len; 891 *mq = mp; 892 return (0); 893 } 894 895 /* 896 * Help break down an mbuf chain by setting the first siz bytes contiguous 897 * pointed to by returned val. 898 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 899 * cases. (The macros use the vars. dpos and dpos2) 900 */ 901 int 902 nfsm_disct(mdp, dposp, siz, left, cp2) 903 struct mbuf **mdp; 904 caddr_t *dposp; 905 int siz; 906 int left; 907 caddr_t *cp2; 908 { 909 register struct mbuf *mp, *mp2; 910 register int siz2, xfer; 911 register caddr_t p; 912 913 mp = *mdp; 914 while (left == 0) { 915 *mdp = mp = mp->m_next; 916 if (mp == NULL) 917 return (EBADRPC); 918 left = mp->m_len; 919 *dposp = mtod(mp, caddr_t); 920 } 921 if (left >= siz) { 922 *cp2 = *dposp; 923 *dposp += siz; 924 } else if (mp->m_next == NULL) { 925 return (EBADRPC); 926 } else if (siz > MHLEN) { 927 panic("nfs S too big"); 928 } else { 929 MGET(mp2, M_WAIT, MT_DATA); 930 mp2->m_next = mp->m_next; 931 mp->m_next = mp2; 932 mp->m_len -= left; 933 mp = mp2; 934 *cp2 = p = mtod(mp, caddr_t); 935 bcopy(*dposp, p, left); /* Copy what was left */ 936 siz2 = siz-left; 937 p += left; 938 mp2 = mp->m_next; 939 /* Loop around copying up the siz2 bytes */ 940 while (siz2 > 0) { 941 if (mp2 == NULL) 942 return (EBADRPC); 943 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 944 if (xfer > 0) { 945 bcopy(mtod(mp2, caddr_t), p, xfer); 946 NFSMADV(mp2, xfer); 947 mp2->m_len -= xfer; 948 p += xfer; 949 siz2 -= xfer; 950 } 951 if (siz2 > 0) 952 mp2 = mp2->m_next; 953 } 954 mp->m_len = siz; 955 *mdp = mp2; 956 *dposp = mtod(mp2, caddr_t); 957 } 958 return (0); 959 } 960 961 /* 962 * Advance the position in the mbuf chain. 963 */ 964 int 965 nfs_adv(mdp, dposp, offs, left) 966 struct mbuf **mdp; 967 caddr_t *dposp; 968 int offs; 969 int left; 970 { 971 register struct mbuf *m; 972 register int s; 973 974 m = *mdp; 975 s = left; 976 while (s < offs) { 977 offs -= s; 978 m = m->m_next; 979 if (m == NULL) 980 return (EBADRPC); 981 s = m->m_len; 982 } 983 *mdp = m; 984 *dposp = mtod(m, caddr_t)+offs; 985 return (0); 986 } 987 988 /* 989 * Copy a string into mbufs for the hard cases... 990 */ 991 int 992 nfsm_strtmbuf(mb, bpos, cp, siz) 993 struct mbuf **mb; 994 char **bpos; 995 char *cp; 996 long siz; 997 { 998 register struct mbuf *m1 = NULL, *m2; 999 long left, xfer, len, tlen; 1000 u_int32_t *tl; 1001 int putsize; 1002 1003 putsize = 1; 1004 m2 = *mb; 1005 left = M_TRAILINGSPACE(m2); 1006 if (left > 0) { 1007 tl = ((u_int32_t *)(*bpos)); 1008 *tl++ = txdr_unsigned(siz); 1009 putsize = 0; 1010 left -= NFSX_UNSIGNED; 1011 m2->m_len += NFSX_UNSIGNED; 1012 if (left > 0) { 1013 bcopy(cp, (caddr_t) tl, left); 1014 siz -= left; 1015 cp += left; 1016 m2->m_len += left; 1017 left = 0; 1018 } 1019 } 1020 /* Loop around adding mbufs */ 1021 while (siz > 0) { 1022 MGET(m1, M_WAIT, MT_DATA); 1023 if (siz > MLEN) 1024 MCLGET(m1, M_WAIT); 1025 m1->m_len = NFSMSIZ(m1); 1026 m2->m_next = m1; 1027 m2 = m1; 1028 tl = mtod(m1, u_int32_t *); 1029 tlen = 0; 1030 if (putsize) { 1031 *tl++ = txdr_unsigned(siz); 1032 m1->m_len -= NFSX_UNSIGNED; 1033 tlen = NFSX_UNSIGNED; 1034 putsize = 0; 1035 } 1036 if (siz < m1->m_len) { 1037 len = nfsm_rndup(siz); 1038 xfer = siz; 1039 if (xfer < len) 1040 *(tl+(xfer>>2)) = 0; 1041 } else { 1042 xfer = len = m1->m_len; 1043 } 1044 bcopy(cp, (caddr_t) tl, xfer); 1045 m1->m_len = len+tlen; 1046 siz -= xfer; 1047 cp += xfer; 1048 } 1049 *mb = m1; 1050 *bpos = mtod(m1, caddr_t)+m1->m_len; 1051 return (0); 1052 } 1053 1054 /* 1055 * Called once to initialize data structures... 1056 */ 1057 void 1058 nfs_init() 1059 { 1060 register int i; 1061 1062 #if !defined(alpha) && defined(DIAGNOSTIC) 1063 /* 1064 * Check to see if major data structures haven't bloated. 1065 */ 1066 if (sizeof (struct nfsnode) > NFS_NODEALLOC) { 1067 printf("struct nfsnode bloated (> %dbytes)\n", NFS_NODEALLOC); 1068 printf("Try reducing NFS_SMALLFH\n"); 1069 } 1070 if (sizeof (struct nfsmount) > NFS_MNTALLOC) { 1071 printf("struct nfsmount bloated (> %dbytes)\n", NFS_MNTALLOC); 1072 printf("Try reducing NFS_MUIDHASHSIZ\n"); 1073 } 1074 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1075 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1076 printf("Try reducing NFS_UIDHASHSIZ\n"); 1077 } 1078 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1079 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1080 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1081 } 1082 #endif 1083 1084 nfsrtt.pos = 0; 1085 rpc_vers = txdr_unsigned(RPC_VER2); 1086 rpc_call = txdr_unsigned(RPC_CALL); 1087 rpc_reply = txdr_unsigned(RPC_REPLY); 1088 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1089 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1090 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1091 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1092 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1093 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1094 nfs_prog = txdr_unsigned(NFS_PROG); 1095 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1096 nfs_true = txdr_unsigned(TRUE); 1097 nfs_false = txdr_unsigned(FALSE); 1098 nfs_xdrneg1 = txdr_unsigned(-1); 1099 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1100 if (nfs_ticks < 1) 1101 nfs_ticks = 1; 1102 #ifdef NFSCLIENT 1103 /* Ensure async daemons disabled */ 1104 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1105 nfs_iodwant[i] = (struct proc *)0; 1106 TAILQ_INIT(&nfs_bufq); 1107 nfs_nhinit(); /* Init the nfsnode table */ 1108 #endif /* NFSCLIENT */ 1109 #ifdef NFSSERVER 1110 nfsrv_init(0); /* Init server data structures */ 1111 nfsrv_initcache(); /* Init the server request cache */ 1112 #endif /* NFSSERVER */ 1113 1114 /* 1115 * Initialize the nqnfs server stuff. 1116 */ 1117 if (nqnfsstarttime == 0) { 1118 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1119 + nqsrv_clockskew + nqsrv_writeslack; 1120 NQLOADNOVRAM(nqnfsstarttime); 1121 CIRCLEQ_INIT(&nqtimerhead); 1122 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); 1123 } 1124 1125 /* 1126 * Initialize reply list and start timer 1127 */ 1128 TAILQ_INIT(&nfs_reqq); 1129 nfs_timer(NULL); 1130 } 1131 1132 #ifdef NFSCLIENT 1133 /* 1134 * Attribute cache routines. 1135 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1136 * that are on the mbuf list 1137 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1138 * error otherwise 1139 */ 1140 1141 /* 1142 * Load the attribute cache (that lives in the nfsnode entry) with 1143 * the values on the mbuf list and 1144 * Iff vap not NULL 1145 * copy the attributes to *vaper 1146 */ 1147 int 1148 nfs_loadattrcache(vpp, mdp, dposp, vaper) 1149 struct vnode **vpp; 1150 struct mbuf **mdp; 1151 caddr_t *dposp; 1152 struct vattr *vaper; 1153 { 1154 register struct vnode *vp = *vpp; 1155 register struct vattr *vap; 1156 register struct nfs_fattr *fp; 1157 extern int (**spec_nfsv2nodeop_p) __P((void *)); 1158 register struct nfsnode *np; 1159 register int32_t t1; 1160 caddr_t cp2; 1161 int error = 0; 1162 int32_t rdev; 1163 struct mbuf *md; 1164 enum vtype vtyp; 1165 u_short vmode; 1166 struct timespec mtime; 1167 struct vnode *nvp; 1168 int v3 = NFS_ISV3(vp); 1169 1170 md = *mdp; 1171 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1172 error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2); 1173 if (error) 1174 return (error); 1175 fp = (struct nfs_fattr *)cp2; 1176 if (v3) { 1177 vtyp = nfsv3tov_type(fp->fa_type); 1178 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1179 rdev = makedev(fxdr_unsigned(u_char, fp->fa3_rdev.specdata1), 1180 fxdr_unsigned(u_char, fp->fa3_rdev.specdata2)); 1181 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1182 } else { 1183 vtyp = nfsv2tov_type(fp->fa_type); 1184 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1185 if (vtyp == VNON || vtyp == VREG) 1186 vtyp = IFTOVT(vmode); 1187 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1188 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1189 1190 /* 1191 * Really ugly NFSv2 kludge. 1192 */ 1193 if (vtyp == VCHR && rdev == 0xffffffff) 1194 vtyp = VFIFO; 1195 } 1196 1197 /* 1198 * If v_type == VNON it is a new node, so fill in the v_type, 1199 * n_mtime fields. Check to see if it represents a special 1200 * device, and if so, check for a possible alias. Once the 1201 * correct vnode has been obtained, fill in the rest of the 1202 * information. 1203 */ 1204 np = VTONFS(vp); 1205 if (vp->v_type == VNON) { 1206 vp->v_type = vtyp; 1207 if (vp->v_type == VFIFO) { 1208 extern int (**fifo_nfsv2nodeop_p) __P((void *)); 1209 vp->v_op = fifo_nfsv2nodeop_p; 1210 } 1211 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1212 vp->v_op = spec_nfsv2nodeop_p; 1213 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1214 if (nvp) { 1215 /* 1216 * Discard unneeded vnode, but save its nfsnode. 1217 * Since the nfsnode does not have a lock, its 1218 * vnode lock has to be carried over. 1219 */ 1220 #ifdef Lite2_integrated 1221 nvp->v_vnlock = vp->v_vnlock; 1222 vp->v_vnlock = NULL; 1223 #endif 1224 nvp->v_data = vp->v_data; 1225 vp->v_data = NULL; 1226 vp->v_op = spec_vnodeop_p; 1227 vrele(vp); 1228 vgone(vp); 1229 /* 1230 * Reinitialize aliased node. 1231 */ 1232 np->n_vnode = nvp; 1233 *vpp = vp = nvp; 1234 } 1235 } 1236 np->n_mtime = mtime.tv_sec; 1237 } 1238 vap = &np->n_vattr; 1239 vap->va_type = vtyp; 1240 vap->va_mode = (vmode & 07777); 1241 vap->va_rdev = (dev_t)rdev; 1242 vap->va_mtime = mtime; 1243 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1244 if (v3) { 1245 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1246 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1247 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1248 fxdr_hyper(&fp->fa3_size, &vap->va_size); 1249 vap->va_blocksize = NFS_FABLKSIZE; 1250 fxdr_hyper(&fp->fa3_used, &vap->va_bytes); 1251 vap->va_fileid = fxdr_unsigned(int32_t, 1252 fp->fa3_fileid.nfsuquad[1]); 1253 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1254 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1255 vap->va_flags = 0; 1256 vap->va_filerev = 0; 1257 } else { 1258 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1259 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1260 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1261 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1262 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); 1263 vap->va_bytes = fxdr_unsigned(int32_t, fp->fa2_blocks) 1264 * NFS_FABLKSIZE; 1265 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1266 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1267 vap->va_flags = 0; 1268 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1269 fp->fa2_ctime.nfsv2_sec); 1270 vap->va_ctime.tv_nsec = 0; 1271 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1272 vap->va_filerev = 0; 1273 } 1274 if (vap->va_size != np->n_size) { 1275 if (vap->va_type == VREG) { 1276 if (np->n_flag & NMODIFIED) { 1277 if (vap->va_size < np->n_size) 1278 vap->va_size = np->n_size; 1279 else 1280 np->n_size = vap->va_size; 1281 } else 1282 np->n_size = vap->va_size; 1283 vnode_pager_setsize(vp, (u_long)np->n_size); 1284 } else 1285 np->n_size = vap->va_size; 1286 } 1287 np->n_attrstamp = time.tv_sec; 1288 if (vaper != NULL) { 1289 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1290 if (np->n_flag & NCHG) { 1291 if (np->n_flag & NACC) 1292 vaper->va_atime = np->n_atim; 1293 if (np->n_flag & NUPD) 1294 vaper->va_mtime = np->n_mtim; 1295 } 1296 } 1297 return (0); 1298 } 1299 1300 /* 1301 * Check the time stamp 1302 * If the cache is valid, copy contents to *vap and return 0 1303 * otherwise return an error 1304 */ 1305 int 1306 nfs_getattrcache(vp, vaper) 1307 register struct vnode *vp; 1308 struct vattr *vaper; 1309 { 1310 register struct nfsnode *np = VTONFS(vp); 1311 register struct vattr *vap; 1312 1313 if ((time.tv_sec - np->n_attrstamp) >= NFS_ATTRTIMEO(np)) { 1314 nfsstats.attrcache_misses++; 1315 return (ENOENT); 1316 } 1317 nfsstats.attrcache_hits++; 1318 vap = &np->n_vattr; 1319 if (vap->va_size != np->n_size) { 1320 if (vap->va_type == VREG) { 1321 if (np->n_flag & NMODIFIED) { 1322 if (vap->va_size < np->n_size) 1323 vap->va_size = np->n_size; 1324 else 1325 np->n_size = vap->va_size; 1326 } else 1327 np->n_size = vap->va_size; 1328 vnode_pager_setsize(vp, (u_long)np->n_size); 1329 } else 1330 np->n_size = vap->va_size; 1331 } 1332 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1333 if (np->n_flag & NCHG) { 1334 if (np->n_flag & NACC) 1335 vaper->va_atime = np->n_atim; 1336 if (np->n_flag & NUPD) 1337 vaper->va_mtime = np->n_mtim; 1338 } 1339 return (0); 1340 } 1341 #endif /* NFSCLIENT */ 1342 1343 /* 1344 * Set up nameidata for a lookup() call and do it 1345 */ 1346 int 1347 nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag) 1348 register struct nameidata *ndp; 1349 fhandle_t *fhp; 1350 int len; 1351 struct nfssvc_sock *slp; 1352 struct mbuf *nam; 1353 struct mbuf **mdp; 1354 caddr_t *dposp; 1355 struct vnode **retdirp; 1356 struct proc *p; 1357 int kerbflag; 1358 { 1359 register int i, rem; 1360 register struct mbuf *md; 1361 register char *fromcp, *tocp; 1362 struct vnode *dp; 1363 int error, rdonly; 1364 struct componentname *cnp = &ndp->ni_cnd; 1365 1366 *retdirp = (struct vnode *)0; 1367 MALLOC(cnp->cn_pnbuf, char *, len + 1, M_NAMEI, M_WAITOK); 1368 /* 1369 * Copy the name from the mbuf list to ndp->ni_pnbuf 1370 * and set the various ndp fields appropriately. 1371 */ 1372 fromcp = *dposp; 1373 tocp = cnp->cn_pnbuf; 1374 md = *mdp; 1375 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1376 for (i = 0; i < len; i++) { 1377 while (rem == 0) { 1378 md = md->m_next; 1379 if (md == NULL) { 1380 error = EBADRPC; 1381 goto out; 1382 } 1383 fromcp = mtod(md, caddr_t); 1384 rem = md->m_len; 1385 } 1386 if (*fromcp == '\0' || *fromcp == '/') { 1387 error = EACCES; 1388 goto out; 1389 } 1390 *tocp++ = *fromcp++; 1391 rem--; 1392 } 1393 *tocp = '\0'; 1394 *mdp = md; 1395 *dposp = fromcp; 1396 len = nfsm_rndup(len)-len; 1397 if (len > 0) { 1398 if (rem >= len) 1399 *dposp += len; 1400 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1401 goto out; 1402 } 1403 ndp->ni_pathlen = tocp - cnp->cn_pnbuf; 1404 cnp->cn_nameptr = cnp->cn_pnbuf; 1405 /* 1406 * Extract and set starting directory. 1407 */ 1408 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1409 nam, &rdonly, kerbflag); 1410 if (error) 1411 goto out; 1412 if (dp->v_type != VDIR) { 1413 vrele(dp); 1414 error = ENOTDIR; 1415 goto out; 1416 } 1417 VREF(dp); 1418 *retdirp = dp; 1419 ndp->ni_startdir = dp; 1420 if (rdonly) 1421 cnp->cn_flags |= (NOCROSSMOUNT | RDONLY); 1422 else 1423 cnp->cn_flags |= NOCROSSMOUNT; 1424 /* 1425 * And call lookup() to do the real work 1426 */ 1427 cnp->cn_proc = p; 1428 error = lookup(ndp); 1429 if (error) 1430 goto out; 1431 /* 1432 * Check for encountering a symbolic link 1433 */ 1434 if (cnp->cn_flags & ISSYMLINK) { 1435 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1436 vput(ndp->ni_dvp); 1437 else 1438 vrele(ndp->ni_dvp); 1439 vput(ndp->ni_vp); 1440 ndp->ni_vp = NULL; 1441 error = EINVAL; 1442 goto out; 1443 } 1444 /* 1445 * Check for saved name request 1446 */ 1447 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1448 cnp->cn_flags |= HASBUF; 1449 return (0); 1450 } 1451 out: 1452 FREE(cnp->cn_pnbuf, M_NAMEI); 1453 return (error); 1454 } 1455 1456 /* 1457 * A fiddled version of m_adj() that ensures null fill to a long 1458 * boundary and only trims off the back end 1459 */ 1460 void 1461 nfsm_adj(mp, len, nul) 1462 struct mbuf *mp; 1463 register int len; 1464 int nul; 1465 { 1466 register struct mbuf *m; 1467 register int count, i; 1468 register char *cp; 1469 1470 /* 1471 * Trim from tail. Scan the mbuf chain, 1472 * calculating its length and finding the last mbuf. 1473 * If the adjustment only affects this mbuf, then just 1474 * adjust and return. Otherwise, rescan and truncate 1475 * after the remaining size. 1476 */ 1477 count = 0; 1478 m = mp; 1479 for (;;) { 1480 count += m->m_len; 1481 if (m->m_next == (struct mbuf *)0) 1482 break; 1483 m = m->m_next; 1484 } 1485 if (m->m_len > len) { 1486 m->m_len -= len; 1487 if (nul > 0) { 1488 cp = mtod(m, caddr_t)+m->m_len-nul; 1489 for (i = 0; i < nul; i++) 1490 *cp++ = '\0'; 1491 } 1492 return; 1493 } 1494 count -= len; 1495 if (count < 0) 1496 count = 0; 1497 /* 1498 * Correct length for chain is "count". 1499 * Find the mbuf with last data, adjust its length, 1500 * and toss data from remaining mbufs on chain. 1501 */ 1502 for (m = mp; m; m = m->m_next) { 1503 if (m->m_len >= count) { 1504 m->m_len = count; 1505 if (nul > 0) { 1506 cp = mtod(m, caddr_t)+m->m_len-nul; 1507 for (i = 0; i < nul; i++) 1508 *cp++ = '\0'; 1509 } 1510 break; 1511 } 1512 count -= m->m_len; 1513 } 1514 for (m = m->m_next;m;m = m->m_next) 1515 m->m_len = 0; 1516 } 1517 1518 /* 1519 * Make these functions instead of macros, so that the kernel text size 1520 * doesn't get too big... 1521 */ 1522 void 1523 nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1524 struct nfsrv_descript *nfsd; 1525 int before_ret; 1526 register struct vattr *before_vap; 1527 int after_ret; 1528 struct vattr *after_vap; 1529 struct mbuf **mbp; 1530 char **bposp; 1531 { 1532 register struct mbuf *mb = *mbp, *mb2; 1533 register char *bpos = *bposp; 1534 register u_int32_t *tl; 1535 1536 if (before_ret) { 1537 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1538 *tl = nfs_false; 1539 } else { 1540 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 1541 *tl++ = nfs_true; 1542 txdr_hyper(&(before_vap->va_size), tl); 1543 tl += 2; 1544 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1545 tl += 2; 1546 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1547 } 1548 *bposp = bpos; 1549 *mbp = mb; 1550 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1551 } 1552 1553 void 1554 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1555 struct nfsrv_descript *nfsd; 1556 int after_ret; 1557 struct vattr *after_vap; 1558 struct mbuf **mbp; 1559 char **bposp; 1560 { 1561 register struct mbuf *mb = *mbp, *mb2; 1562 register char *bpos = *bposp; 1563 register u_int32_t *tl; 1564 register struct nfs_fattr *fp; 1565 1566 if (after_ret) { 1567 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1568 *tl = nfs_false; 1569 } else { 1570 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 1571 *tl++ = nfs_true; 1572 fp = (struct nfs_fattr *)tl; 1573 nfsm_srvfattr(nfsd, after_vap, fp); 1574 } 1575 *mbp = mb; 1576 *bposp = bpos; 1577 } 1578 1579 void 1580 nfsm_srvfattr(nfsd, vap, fp) 1581 register struct nfsrv_descript *nfsd; 1582 register struct vattr *vap; 1583 register struct nfs_fattr *fp; 1584 { 1585 1586 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1587 fp->fa_uid = txdr_unsigned(vap->va_uid); 1588 fp->fa_gid = txdr_unsigned(vap->va_gid); 1589 if (nfsd->nd_flag & ND_NFSV3) { 1590 fp->fa_type = vtonfsv3_type(vap->va_type); 1591 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1592 txdr_hyper(&vap->va_size, &fp->fa3_size); 1593 txdr_hyper(&vap->va_bytes, &fp->fa3_used); 1594 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 1595 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 1596 fp->fa3_fsid.nfsuquad[0] = 0; 1597 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1598 fp->fa3_fileid.nfsuquad[0] = 0; 1599 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1600 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1601 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1602 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1603 } else { 1604 fp->fa_type = vtonfsv2_type(vap->va_type); 1605 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1606 fp->fa2_size = txdr_unsigned(vap->va_size); 1607 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1608 if (vap->va_type == VFIFO) 1609 fp->fa2_rdev = 0xffffffff; 1610 else 1611 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1612 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1613 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1614 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1615 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1616 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1617 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1618 } 1619 } 1620 1621 /* 1622 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1623 * - look up fsid in mount list (if not found ret error) 1624 * - get vp and export rights by calling VFS_FHTOVP() 1625 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1626 * - if not lockflag unlock it with VOP_UNLOCK() 1627 */ 1628 int 1629 nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag) 1630 fhandle_t *fhp; 1631 int lockflag; 1632 struct vnode **vpp; 1633 struct ucred *cred; 1634 struct nfssvc_sock *slp; 1635 struct mbuf *nam; 1636 int *rdonlyp; 1637 int kerbflag; 1638 { 1639 #ifdef Lite2_integrated 1640 struct proc *p = curproc; /* XXX */ 1641 #endif 1642 register struct mount *mp; 1643 register int i; 1644 struct ucred *credanon; 1645 int error, exflags; 1646 1647 *vpp = (struct vnode *)0; 1648 #ifdef Lite2_integrated 1649 mp = vfs_getvfs(&fhp->fh_fsid); 1650 #else 1651 mp = getvfs(&fhp->fh_fsid); 1652 #endif 1653 if (!mp) 1654 return (ESTALE); 1655 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon); 1656 if (error) 1657 return (error); 1658 /* 1659 * Check/setup credentials. 1660 */ 1661 if (exflags & MNT_EXKERB) { 1662 if (!kerbflag) { 1663 vput(*vpp); 1664 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1665 } 1666 } else if (kerbflag) { 1667 vput(*vpp); 1668 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1669 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1670 cred->cr_uid = credanon->cr_uid; 1671 cred->cr_gid = credanon->cr_gid; 1672 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1673 cred->cr_groups[i] = credanon->cr_groups[i]; 1674 cred->cr_ngroups = i; 1675 } 1676 if (exflags & MNT_EXRDONLY) 1677 *rdonlyp = 1; 1678 else 1679 *rdonlyp = 0; 1680 if (!lockflag) 1681 #ifdef Lite2_integrated 1682 VOP_UNLOCK(*vpp, 0, p); 1683 #else 1684 VOP_UNLOCK(*vpp); 1685 #endif 1686 return (0); 1687 } 1688 1689 /* 1690 * This function compares two net addresses by family and returns TRUE 1691 * if they are the same host. 1692 * If there is any doubt, return FALSE. 1693 * The AF_INET family is handled as a special case so that address mbufs 1694 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1695 */ 1696 int 1697 netaddr_match(family, haddr, nam) 1698 int family; 1699 union nethostaddr *haddr; 1700 struct mbuf *nam; 1701 { 1702 register struct sockaddr_in *inetaddr; 1703 1704 switch (family) { 1705 case AF_INET: 1706 inetaddr = mtod(nam, struct sockaddr_in *); 1707 if (inetaddr->sin_family == AF_INET && 1708 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1709 return (1); 1710 break; 1711 #ifdef ISO 1712 case AF_ISO: 1713 { 1714 register struct sockaddr_iso *isoaddr1, *isoaddr2; 1715 1716 isoaddr1 = mtod(nam, struct sockaddr_iso *); 1717 isoaddr2 = mtod(haddr->had_nam, struct sockaddr_iso *); 1718 if (isoaddr1->siso_family == AF_ISO && 1719 isoaddr1->siso_nlen > 0 && 1720 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 1721 SAME_ISOADDR(isoaddr1, isoaddr2)) 1722 return (1); 1723 break; 1724 } 1725 #endif /* ISO */ 1726 default: 1727 break; 1728 }; 1729 return (0); 1730 } 1731 1732 static nfsuint64 nfs_nullcookie = {{ 0, 0 }}; 1733 /* 1734 * This function finds the directory cookie that corresponds to the 1735 * logical byte offset given. 1736 */ 1737 nfsuint64 * 1738 nfs_getcookie(np, off, add) 1739 register struct nfsnode *np; 1740 off_t off; 1741 int add; 1742 { 1743 register struct nfsdmap *dp, *dp2; 1744 register int pos; 1745 1746 pos = off / NFS_DIRBLKSIZ; 1747 if (pos == 0) { 1748 #ifdef DIAGNOSTIC 1749 if (add) 1750 panic("nfs getcookie add at 0"); 1751 #endif 1752 return (&nfs_nullcookie); 1753 } 1754 pos--; 1755 dp = np->n_cookies.lh_first; 1756 if (!dp) { 1757 if (add) { 1758 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 1759 M_NFSDIROFF, M_WAITOK); 1760 dp->ndm_eocookie = 0; 1761 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 1762 } else 1763 return ((nfsuint64 *)0); 1764 } 1765 while (pos >= NFSNUMCOOKIES) { 1766 pos -= NFSNUMCOOKIES; 1767 if (dp->ndm_list.le_next) { 1768 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 1769 pos >= dp->ndm_eocookie) 1770 return ((nfsuint64 *)0); 1771 dp = dp->ndm_list.le_next; 1772 } else if (add) { 1773 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 1774 M_NFSDIROFF, M_WAITOK); 1775 dp2->ndm_eocookie = 0; 1776 LIST_INSERT_AFTER(dp, dp2, ndm_list); 1777 dp = dp2; 1778 } else 1779 return ((nfsuint64 *)0); 1780 } 1781 if (pos >= dp->ndm_eocookie) { 1782 if (add) 1783 dp->ndm_eocookie = pos + 1; 1784 else 1785 return ((nfsuint64 *)0); 1786 } 1787 return (&dp->ndm_cookies[pos]); 1788 } 1789 1790 /* 1791 * Invalidate cached directory information, except for the actual directory 1792 * blocks (which are invalidated separately). 1793 * Done mainly to avoid the use of stale offset cookies. 1794 */ 1795 void 1796 nfs_invaldir(vp) 1797 register struct vnode *vp; 1798 { 1799 #ifdef notdef /* XXX */ 1800 register struct nfsnode *np = VTONFS(vp); 1801 1802 #ifdef DIAGNOSTIC 1803 if (vp->v_type != VDIR) 1804 panic("nfs: invaldir not dir"); 1805 #endif 1806 np->n_direofoffset = 0; 1807 np->n_cookieverf.nfsuquad[0] = 0; 1808 np->n_cookieverf.nfsuquad[1] = 0; 1809 if (np->n_cookies.lh_first) 1810 np->n_cookies.lh_first->ndm_eocookie = 0; 1811 #endif 1812 } 1813 1814 /* 1815 * The write verifier has changed (probably due to a server reboot), so all 1816 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 1817 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 1818 * flag. Once done the new write verifier can be set for the mount point. 1819 */ 1820 void 1821 nfs_clearcommit(mp) 1822 struct mount *mp; 1823 { 1824 register struct vnode *vp, *nvp; 1825 register struct buf *bp, *nbp; 1826 int s; 1827 1828 s = splbio(); 1829 loop: 1830 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 1831 if (vp->v_mount != mp) /* Paranoia */ 1832 goto loop; 1833 nvp = vp->v_mntvnodes.le_next; 1834 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 1835 nbp = bp->b_vnbufs.le_next; 1836 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 1837 == (B_DELWRI | B_NEEDCOMMIT)) 1838 bp->b_flags &= ~B_NEEDCOMMIT; 1839 } 1840 } 1841 splx(s); 1842 } 1843 1844 /* 1845 * Map errnos to NFS error numbers. For Version 3 also filter out error 1846 * numbers not specified for the associated procedure. 1847 */ 1848 int 1849 nfsrv_errmap(nd, err) 1850 struct nfsrv_descript *nd; 1851 register int err; 1852 { 1853 register short *defaulterrp, *errp; 1854 1855 if (nd->nd_flag & ND_NFSV3) { 1856 if (nd->nd_procnum <= NFSPROC_COMMIT) { 1857 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 1858 while (*++errp) { 1859 if (*errp == err) 1860 return (err); 1861 else if (*errp > err) 1862 break; 1863 } 1864 return ((int)*defaulterrp); 1865 } else 1866 return (err & 0xffff); 1867 } 1868 if (err <= ELAST) 1869 return ((int)nfsrv_v2errmap[err - 1]); 1870 return (NFSERR_IO); 1871 } 1872 1873 /* 1874 * Sort the group list in increasing numerical order. 1875 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 1876 * that used to be here.) 1877 */ 1878 void 1879 nfsrvw_sort(list, num) 1880 register gid_t *list; 1881 register int num; 1882 { 1883 register int i, j; 1884 gid_t v; 1885 1886 /* Insertion sort. */ 1887 for (i = 1; i < num; i++) { 1888 v = list[i]; 1889 /* find correct slot for value v, moving others up */ 1890 for (j = i; --j >= 0 && v < list[j];) 1891 list[j + 1] = list[j]; 1892 list[j + 1] = v; 1893 } 1894 } 1895 1896 /* 1897 * copy credentials making sure that the result can be compared with bcmp(). 1898 */ 1899 void 1900 nfsrv_setcred(incred, outcred) 1901 register struct ucred *incred, *outcred; 1902 { 1903 register int i; 1904 1905 bzero((caddr_t)outcred, sizeof (struct ucred)); 1906 outcred->cr_ref = 1; 1907 outcred->cr_uid = incred->cr_uid; 1908 outcred->cr_gid = incred->cr_gid; 1909 outcred->cr_ngroups = incred->cr_ngroups; 1910 for (i = 0; i < incred->cr_ngroups; i++) 1911 outcred->cr_groups[i] = incred->cr_groups[i]; 1912 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 1913 } 1914
Indexes created Tue Sep 23 02:09:52 GMT 2025