Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/nfs/nfs_subs.c
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1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)nfs_subs.c 8.8 (Berkeley) 5/22/95 37 * $FreeBSD$ 38 */ 39 40 /* 41 * These functions support the macros and help fiddle mbuf chains for 42 * the nfs op functions. They do things like create the rpc header and 43 * copy data between mbuf chains and uio lists. 44 */ 45 #include <sys/param.h> 46 #include <sys/buf.h> 47 #include <sys/proc.h> 48 #include <sys/systm.h> 49 #include <sys/kernel.h> 50 #include <sys/mount.h> 51 #include <sys/vnode.h> 52 #include <sys/namei.h> 53 #include <sys/mbuf.h> 54 #include <sys/socket.h> 55 #include <sys/stat.h> 56 #include <sys/malloc.h> 57 #include <sys/sysent.h> 58 #include <sys/syscall.h> 59 60 #include <vm/vm.h> 61 #include <vm/vm_object.h> 62 #include <vm/vm_extern.h> 63 #include <vm/vm_zone.h> 64 65 #include <nfs/rpcv2.h> 66 #include <nfs/nfsproto.h> 67 #include <nfs/nfs.h> 68 #include <nfs/nfsnode.h> 69 #include <nfs/xdr_subs.h> 70 #include <nfs/nfsm_subs.h> 71 #include <nfs/nfsmount.h> 72 #include <nfs/nqnfs.h> 73 #include <nfs/nfsrtt.h> 74 75 #include <miscfs/specfs/specdev.h> 76 77 #include <netinet/in.h> 78 #ifdef ISO 79 #include <netiso/iso.h> 80 #endif 81 82 /* 83 * Data items converted to xdr at startup, since they are constant 84 * This is kinda hokey, but may save a little time doing byte swaps 85 */ 86 u_int32_t nfs_xdrneg1; 87 u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 88 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 89 rpc_auth_kerb; 90 u_int32_t nfs_prog, nqnfs_prog, nfs_true, nfs_false; 91 92 /* And other global data */ 93 static u_int32_t nfs_xid = 0; 94 static enum vtype nv2tov_type[8]= { 95 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON 96 }; 97 enum vtype nv3tov_type[8]= { 98 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO 99 }; 100 101 int nfs_ticks; 102 103 struct nfs_reqq nfs_reqq; 104 struct nfssvc_sockhead nfssvc_sockhead; 105 int nfssvc_sockhead_flag; 106 struct nfsd_head nfsd_head; 107 int nfsd_head_flag; 108 struct nfs_bufq nfs_bufq; 109 struct nqtimerhead nqtimerhead; 110 struct nqfhhashhead *nqfhhashtbl; 111 u_long nqfhhash; 112 113 static void (*nfs_prev_lease_updatetime) __P((int)); 114 static int nfs_prev_nfssvc_sy_narg; 115 static sy_call_t *nfs_prev_nfssvc_sy_call; 116 117 #ifndef NFS_NOSERVER 118 119 static vop_t *nfs_prev_vop_lease_check; 120 static int nfs_prev_getfh_sy_narg; 121 static sy_call_t *nfs_prev_getfh_sy_call; 122 123 /* 124 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 125 */ 126 int nfsv3_procid[NFS_NPROCS] = { 127 NFSPROC_NULL, 128 NFSPROC_GETATTR, 129 NFSPROC_SETATTR, 130 NFSPROC_NOOP, 131 NFSPROC_LOOKUP, 132 NFSPROC_READLINK, 133 NFSPROC_READ, 134 NFSPROC_NOOP, 135 NFSPROC_WRITE, 136 NFSPROC_CREATE, 137 NFSPROC_REMOVE, 138 NFSPROC_RENAME, 139 NFSPROC_LINK, 140 NFSPROC_SYMLINK, 141 NFSPROC_MKDIR, 142 NFSPROC_RMDIR, 143 NFSPROC_READDIR, 144 NFSPROC_FSSTAT, 145 NFSPROC_NOOP, 146 NFSPROC_NOOP, 147 NFSPROC_NOOP, 148 NFSPROC_NOOP, 149 NFSPROC_NOOP, 150 NFSPROC_NOOP, 151 NFSPROC_NOOP, 152 NFSPROC_NOOP 153 }; 154 155 #endif /* NFS_NOSERVER */ 156 /* 157 * and the reverse mapping from generic to Version 2 procedure numbers 158 */ 159 int nfsv2_procid[NFS_NPROCS] = { 160 NFSV2PROC_NULL, 161 NFSV2PROC_GETATTR, 162 NFSV2PROC_SETATTR, 163 NFSV2PROC_LOOKUP, 164 NFSV2PROC_NOOP, 165 NFSV2PROC_READLINK, 166 NFSV2PROC_READ, 167 NFSV2PROC_WRITE, 168 NFSV2PROC_CREATE, 169 NFSV2PROC_MKDIR, 170 NFSV2PROC_SYMLINK, 171 NFSV2PROC_CREATE, 172 NFSV2PROC_REMOVE, 173 NFSV2PROC_RMDIR, 174 NFSV2PROC_RENAME, 175 NFSV2PROC_LINK, 176 NFSV2PROC_READDIR, 177 NFSV2PROC_NOOP, 178 NFSV2PROC_STATFS, 179 NFSV2PROC_NOOP, 180 NFSV2PROC_NOOP, 181 NFSV2PROC_NOOP, 182 NFSV2PROC_NOOP, 183 NFSV2PROC_NOOP, 184 NFSV2PROC_NOOP, 185 NFSV2PROC_NOOP, 186 }; 187 188 #ifndef NFS_NOSERVER 189 /* 190 * Maps errno values to nfs error numbers. 191 * Use NFSERR_IO as the catch all for ones not specifically defined in 192 * RFC 1094. 193 */ 194 static u_char nfsrv_v2errmap[ELAST] = { 195 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 196 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 197 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 198 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 199 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 200 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 201 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 202 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 203 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 204 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 205 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 206 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 207 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 208 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 209 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 210 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 211 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 212 NFSERR_IO /* << Last is 86 */ 213 }; 214 215 /* 216 * Maps errno values to nfs error numbers. 217 * Although it is not obvious whether or not NFS clients really care if 218 * a returned error value is in the specified list for the procedure, the 219 * safest thing to do is filter them appropriately. For Version 2, the 220 * X/Open XNFS document is the only specification that defines error values 221 * for each RPC (The RFC simply lists all possible error values for all RPCs), 222 * so I have decided to not do this for Version 2. 223 * The first entry is the default error return and the rest are the valid 224 * errors for that RPC in increasing numeric order. 225 */ 226 static short nfsv3err_null[] = { 227 0, 228 0, 229 }; 230 231 static short nfsv3err_getattr[] = { 232 NFSERR_IO, 233 NFSERR_IO, 234 NFSERR_STALE, 235 NFSERR_BADHANDLE, 236 NFSERR_SERVERFAULT, 237 0, 238 }; 239 240 static short nfsv3err_setattr[] = { 241 NFSERR_IO, 242 NFSERR_PERM, 243 NFSERR_IO, 244 NFSERR_ACCES, 245 NFSERR_INVAL, 246 NFSERR_NOSPC, 247 NFSERR_ROFS, 248 NFSERR_DQUOT, 249 NFSERR_STALE, 250 NFSERR_BADHANDLE, 251 NFSERR_NOT_SYNC, 252 NFSERR_SERVERFAULT, 253 0, 254 }; 255 256 static short nfsv3err_lookup[] = { 257 NFSERR_IO, 258 NFSERR_NOENT, 259 NFSERR_IO, 260 NFSERR_ACCES, 261 NFSERR_NOTDIR, 262 NFSERR_NAMETOL, 263 NFSERR_STALE, 264 NFSERR_BADHANDLE, 265 NFSERR_SERVERFAULT, 266 0, 267 }; 268 269 static short nfsv3err_access[] = { 270 NFSERR_IO, 271 NFSERR_IO, 272 NFSERR_STALE, 273 NFSERR_BADHANDLE, 274 NFSERR_SERVERFAULT, 275 0, 276 }; 277 278 static short nfsv3err_readlink[] = { 279 NFSERR_IO, 280 NFSERR_IO, 281 NFSERR_ACCES, 282 NFSERR_INVAL, 283 NFSERR_STALE, 284 NFSERR_BADHANDLE, 285 NFSERR_NOTSUPP, 286 NFSERR_SERVERFAULT, 287 0, 288 }; 289 290 static short nfsv3err_read[] = { 291 NFSERR_IO, 292 NFSERR_IO, 293 NFSERR_NXIO, 294 NFSERR_ACCES, 295 NFSERR_INVAL, 296 NFSERR_STALE, 297 NFSERR_BADHANDLE, 298 NFSERR_SERVERFAULT, 299 0, 300 }; 301 302 static short nfsv3err_write[] = { 303 NFSERR_IO, 304 NFSERR_IO, 305 NFSERR_ACCES, 306 NFSERR_INVAL, 307 NFSERR_FBIG, 308 NFSERR_NOSPC, 309 NFSERR_ROFS, 310 NFSERR_DQUOT, 311 NFSERR_STALE, 312 NFSERR_BADHANDLE, 313 NFSERR_SERVERFAULT, 314 0, 315 }; 316 317 static short nfsv3err_create[] = { 318 NFSERR_IO, 319 NFSERR_IO, 320 NFSERR_ACCES, 321 NFSERR_EXIST, 322 NFSERR_NOTDIR, 323 NFSERR_NOSPC, 324 NFSERR_ROFS, 325 NFSERR_NAMETOL, 326 NFSERR_DQUOT, 327 NFSERR_STALE, 328 NFSERR_BADHANDLE, 329 NFSERR_NOTSUPP, 330 NFSERR_SERVERFAULT, 331 0, 332 }; 333 334 static short nfsv3err_mkdir[] = { 335 NFSERR_IO, 336 NFSERR_IO, 337 NFSERR_ACCES, 338 NFSERR_EXIST, 339 NFSERR_NOTDIR, 340 NFSERR_NOSPC, 341 NFSERR_ROFS, 342 NFSERR_NAMETOL, 343 NFSERR_DQUOT, 344 NFSERR_STALE, 345 NFSERR_BADHANDLE, 346 NFSERR_NOTSUPP, 347 NFSERR_SERVERFAULT, 348 0, 349 }; 350 351 static short nfsv3err_symlink[] = { 352 NFSERR_IO, 353 NFSERR_IO, 354 NFSERR_ACCES, 355 NFSERR_EXIST, 356 NFSERR_NOTDIR, 357 NFSERR_NOSPC, 358 NFSERR_ROFS, 359 NFSERR_NAMETOL, 360 NFSERR_DQUOT, 361 NFSERR_STALE, 362 NFSERR_BADHANDLE, 363 NFSERR_NOTSUPP, 364 NFSERR_SERVERFAULT, 365 0, 366 }; 367 368 static short nfsv3err_mknod[] = { 369 NFSERR_IO, 370 NFSERR_IO, 371 NFSERR_ACCES, 372 NFSERR_EXIST, 373 NFSERR_NOTDIR, 374 NFSERR_NOSPC, 375 NFSERR_ROFS, 376 NFSERR_NAMETOL, 377 NFSERR_DQUOT, 378 NFSERR_STALE, 379 NFSERR_BADHANDLE, 380 NFSERR_NOTSUPP, 381 NFSERR_SERVERFAULT, 382 NFSERR_BADTYPE, 383 0, 384 }; 385 386 static short nfsv3err_remove[] = { 387 NFSERR_IO, 388 NFSERR_NOENT, 389 NFSERR_IO, 390 NFSERR_ACCES, 391 NFSERR_NOTDIR, 392 NFSERR_ROFS, 393 NFSERR_NAMETOL, 394 NFSERR_STALE, 395 NFSERR_BADHANDLE, 396 NFSERR_SERVERFAULT, 397 0, 398 }; 399 400 static short nfsv3err_rmdir[] = { 401 NFSERR_IO, 402 NFSERR_NOENT, 403 NFSERR_IO, 404 NFSERR_ACCES, 405 NFSERR_EXIST, 406 NFSERR_NOTDIR, 407 NFSERR_INVAL, 408 NFSERR_ROFS, 409 NFSERR_NAMETOL, 410 NFSERR_NOTEMPTY, 411 NFSERR_STALE, 412 NFSERR_BADHANDLE, 413 NFSERR_NOTSUPP, 414 NFSERR_SERVERFAULT, 415 0, 416 }; 417 418 static short nfsv3err_rename[] = { 419 NFSERR_IO, 420 NFSERR_NOENT, 421 NFSERR_IO, 422 NFSERR_ACCES, 423 NFSERR_EXIST, 424 NFSERR_XDEV, 425 NFSERR_NOTDIR, 426 NFSERR_ISDIR, 427 NFSERR_INVAL, 428 NFSERR_NOSPC, 429 NFSERR_ROFS, 430 NFSERR_MLINK, 431 NFSERR_NAMETOL, 432 NFSERR_NOTEMPTY, 433 NFSERR_DQUOT, 434 NFSERR_STALE, 435 NFSERR_BADHANDLE, 436 NFSERR_NOTSUPP, 437 NFSERR_SERVERFAULT, 438 0, 439 }; 440 441 static short nfsv3err_link[] = { 442 NFSERR_IO, 443 NFSERR_IO, 444 NFSERR_ACCES, 445 NFSERR_EXIST, 446 NFSERR_XDEV, 447 NFSERR_NOTDIR, 448 NFSERR_INVAL, 449 NFSERR_NOSPC, 450 NFSERR_ROFS, 451 NFSERR_MLINK, 452 NFSERR_NAMETOL, 453 NFSERR_DQUOT, 454 NFSERR_STALE, 455 NFSERR_BADHANDLE, 456 NFSERR_NOTSUPP, 457 NFSERR_SERVERFAULT, 458 0, 459 }; 460 461 static short nfsv3err_readdir[] = { 462 NFSERR_IO, 463 NFSERR_IO, 464 NFSERR_ACCES, 465 NFSERR_NOTDIR, 466 NFSERR_STALE, 467 NFSERR_BADHANDLE, 468 NFSERR_BAD_COOKIE, 469 NFSERR_TOOSMALL, 470 NFSERR_SERVERFAULT, 471 0, 472 }; 473 474 static short nfsv3err_readdirplus[] = { 475 NFSERR_IO, 476 NFSERR_IO, 477 NFSERR_ACCES, 478 NFSERR_NOTDIR, 479 NFSERR_STALE, 480 NFSERR_BADHANDLE, 481 NFSERR_BAD_COOKIE, 482 NFSERR_NOTSUPP, 483 NFSERR_TOOSMALL, 484 NFSERR_SERVERFAULT, 485 0, 486 }; 487 488 static short nfsv3err_fsstat[] = { 489 NFSERR_IO, 490 NFSERR_IO, 491 NFSERR_STALE, 492 NFSERR_BADHANDLE, 493 NFSERR_SERVERFAULT, 494 0, 495 }; 496 497 static short nfsv3err_fsinfo[] = { 498 NFSERR_STALE, 499 NFSERR_STALE, 500 NFSERR_BADHANDLE, 501 NFSERR_SERVERFAULT, 502 0, 503 }; 504 505 static short nfsv3err_pathconf[] = { 506 NFSERR_STALE, 507 NFSERR_STALE, 508 NFSERR_BADHANDLE, 509 NFSERR_SERVERFAULT, 510 0, 511 }; 512 513 static short nfsv3err_commit[] = { 514 NFSERR_IO, 515 NFSERR_IO, 516 NFSERR_STALE, 517 NFSERR_BADHANDLE, 518 NFSERR_SERVERFAULT, 519 0, 520 }; 521 522 static short *nfsrv_v3errmap[] = { 523 nfsv3err_null, 524 nfsv3err_getattr, 525 nfsv3err_setattr, 526 nfsv3err_lookup, 527 nfsv3err_access, 528 nfsv3err_readlink, 529 nfsv3err_read, 530 nfsv3err_write, 531 nfsv3err_create, 532 nfsv3err_mkdir, 533 nfsv3err_symlink, 534 nfsv3err_mknod, 535 nfsv3err_remove, 536 nfsv3err_rmdir, 537 nfsv3err_rename, 538 nfsv3err_link, 539 nfsv3err_readdir, 540 nfsv3err_readdirplus, 541 nfsv3err_fsstat, 542 nfsv3err_fsinfo, 543 nfsv3err_pathconf, 544 nfsv3err_commit, 545 }; 546 547 #endif /* NFS_NOSERVER */ 548 549 extern struct nfsrtt nfsrtt; 550 extern time_t nqnfsstarttime; 551 extern int nqsrv_clockskew; 552 extern int nqsrv_writeslack; 553 extern int nqsrv_maxlease; 554 extern struct nfsstats nfsstats; 555 extern int nqnfs_piggy[NFS_NPROCS]; 556 extern nfstype nfsv2_type[9]; 557 extern nfstype nfsv3_type[9]; 558 extern struct nfsnodehashhead *nfsnodehashtbl; 559 extern u_long nfsnodehash; 560 561 struct getfh_args; 562 extern int getfh(struct proc *, struct getfh_args *, int *); 563 struct nfssvc_args; 564 extern int nfssvc(struct proc *, struct nfssvc_args *, int *); 565 566 LIST_HEAD(nfsnodehashhead, nfsnode); 567 568 int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 569 570 u_quad_t 571 nfs_curusec() 572 { 573 struct timeval tv; 574 575 getmicrotime(&tv); 576 return ((u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec); 577 } 578 579 /* 580 * Create the header for an rpc request packet 581 * The hsiz is the size of the rest of the nfs request header. 582 * (just used to decide if a cluster is a good idea) 583 */ 584 struct mbuf * 585 nfsm_reqh(vp, procid, hsiz, bposp) 586 struct vnode *vp; 587 u_long procid; 588 int hsiz; 589 caddr_t *bposp; 590 { 591 register struct mbuf *mb; 592 register u_int32_t *tl; 593 register caddr_t bpos; 594 struct mbuf *mb2; 595 struct nfsmount *nmp; 596 int nqflag; 597 598 MGET(mb, M_WAIT, MT_DATA); 599 if (hsiz >= MINCLSIZE) 600 MCLGET(mb, M_WAIT); 601 mb->m_len = 0; 602 bpos = mtod(mb, caddr_t); 603 604 /* 605 * For NQNFS, add lease request. 606 */ 607 if (vp) { 608 nmp = VFSTONFS(vp->v_mount); 609 if (nmp->nm_flag & NFSMNT_NQNFS) { 610 nqflag = NQNFS_NEEDLEASE(vp, procid); 611 if (nqflag) { 612 nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED); 613 *tl++ = txdr_unsigned(nqflag); 614 *tl = txdr_unsigned(nmp->nm_leaseterm); 615 } else { 616 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 617 *tl = 0; 618 } 619 } 620 } 621 /* Finally, return values */ 622 *bposp = bpos; 623 return (mb); 624 } 625 626 /* 627 * Build the RPC header and fill in the authorization info. 628 * The authorization string argument is only used when the credentials 629 * come from outside of the kernel. 630 * Returns the head of the mbuf list. 631 */ 632 struct mbuf * 633 nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 634 verf_str, mrest, mrest_len, mbp, xidp) 635 register struct ucred *cr; 636 int nmflag; 637 int procid; 638 int auth_type; 639 int auth_len; 640 char *auth_str; 641 int verf_len; 642 char *verf_str; 643 struct mbuf *mrest; 644 int mrest_len; 645 struct mbuf **mbp; 646 u_int32_t *xidp; 647 { 648 register struct mbuf *mb; 649 register u_int32_t *tl; 650 register caddr_t bpos; 651 register int i; 652 struct mbuf *mreq, *mb2; 653 int siz, grpsiz, authsiz; 654 655 authsiz = nfsm_rndup(auth_len); 656 MGETHDR(mb, M_WAIT, MT_DATA); 657 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 658 MCLGET(mb, M_WAIT); 659 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 660 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 661 } else { 662 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 663 } 664 mb->m_len = 0; 665 mreq = mb; 666 bpos = mtod(mb, caddr_t); 667 668 /* 669 * First the RPC header. 670 */ 671 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 672 673 /* Get a pretty random xid to start with */ 674 if (!nfs_xid) 675 nfs_xid = random(); 676 /* 677 * Skip zero xid if it should ever happen. 678 */ 679 if (++nfs_xid == 0) 680 nfs_xid++; 681 682 *tl++ = *xidp = txdr_unsigned(nfs_xid); 683 *tl++ = rpc_call; 684 *tl++ = rpc_vers; 685 if (nmflag & NFSMNT_NQNFS) { 686 *tl++ = txdr_unsigned(NQNFS_PROG); 687 *tl++ = txdr_unsigned(NQNFS_VER3); 688 } else { 689 *tl++ = txdr_unsigned(NFS_PROG); 690 if (nmflag & NFSMNT_NFSV3) 691 *tl++ = txdr_unsigned(NFS_VER3); 692 else 693 *tl++ = txdr_unsigned(NFS_VER2); 694 } 695 if (nmflag & NFSMNT_NFSV3) 696 *tl++ = txdr_unsigned(procid); 697 else 698 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 699 700 /* 701 * And then the authorization cred. 702 */ 703 *tl++ = txdr_unsigned(auth_type); 704 *tl = txdr_unsigned(authsiz); 705 switch (auth_type) { 706 case RPCAUTH_UNIX: 707 nfsm_build(tl, u_int32_t *, auth_len); 708 *tl++ = 0; /* stamp ?? */ 709 *tl++ = 0; /* NULL hostname */ 710 *tl++ = txdr_unsigned(cr->cr_uid); 711 *tl++ = txdr_unsigned(cr->cr_groups[0]); 712 grpsiz = (auth_len >> 2) - 5; 713 *tl++ = txdr_unsigned(grpsiz); 714 for (i = 1; i <= grpsiz; i++) 715 *tl++ = txdr_unsigned(cr->cr_groups[i]); 716 break; 717 case RPCAUTH_KERB4: 718 siz = auth_len; 719 while (siz > 0) { 720 if (M_TRAILINGSPACE(mb) == 0) { 721 MGET(mb2, M_WAIT, MT_DATA); 722 if (siz >= MINCLSIZE) 723 MCLGET(mb2, M_WAIT); 724 mb->m_next = mb2; 725 mb = mb2; 726 mb->m_len = 0; 727 bpos = mtod(mb, caddr_t); 728 } 729 i = min(siz, M_TRAILINGSPACE(mb)); 730 bcopy(auth_str, bpos, i); 731 mb->m_len += i; 732 auth_str += i; 733 bpos += i; 734 siz -= i; 735 } 736 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 737 for (i = 0; i < siz; i++) 738 *bpos++ = '\0'; 739 mb->m_len += siz; 740 } 741 break; 742 }; 743 744 /* 745 * And the verifier... 746 */ 747 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 748 if (verf_str) { 749 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 750 *tl = txdr_unsigned(verf_len); 751 siz = verf_len; 752 while (siz > 0) { 753 if (M_TRAILINGSPACE(mb) == 0) { 754 MGET(mb2, M_WAIT, MT_DATA); 755 if (siz >= MINCLSIZE) 756 MCLGET(mb2, M_WAIT); 757 mb->m_next = mb2; 758 mb = mb2; 759 mb->m_len = 0; 760 bpos = mtod(mb, caddr_t); 761 } 762 i = min(siz, M_TRAILINGSPACE(mb)); 763 bcopy(verf_str, bpos, i); 764 mb->m_len += i; 765 verf_str += i; 766 bpos += i; 767 siz -= i; 768 } 769 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 770 for (i = 0; i < siz; i++) 771 *bpos++ = '\0'; 772 mb->m_len += siz; 773 } 774 } else { 775 *tl++ = txdr_unsigned(RPCAUTH_NULL); 776 *tl = 0; 777 } 778 mb->m_next = mrest; 779 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 780 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 781 *mbp = mb; 782 return (mreq); 783 } 784 785 /* 786 * copies mbuf chain to the uio scatter/gather list 787 */ 788 int 789 nfsm_mbuftouio(mrep, uiop, siz, dpos) 790 struct mbuf **mrep; 791 register struct uio *uiop; 792 int siz; 793 caddr_t *dpos; 794 { 795 register char *mbufcp, *uiocp; 796 register int xfer, left, len; 797 register struct mbuf *mp; 798 long uiosiz, rem; 799 int error = 0; 800 801 mp = *mrep; 802 mbufcp = *dpos; 803 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 804 rem = nfsm_rndup(siz)-siz; 805 while (siz > 0) { 806 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 807 return (EFBIG); 808 left = uiop->uio_iov->iov_len; 809 uiocp = uiop->uio_iov->iov_base; 810 if (left > siz) 811 left = siz; 812 uiosiz = left; 813 while (left > 0) { 814 while (len == 0) { 815 mp = mp->m_next; 816 if (mp == NULL) 817 return (EBADRPC); 818 mbufcp = mtod(mp, caddr_t); 819 len = mp->m_len; 820 } 821 xfer = (left > len) ? len : left; 822 #ifdef notdef 823 /* Not Yet.. */ 824 if (uiop->uio_iov->iov_op != NULL) 825 (*(uiop->uio_iov->iov_op)) 826 (mbufcp, uiocp, xfer); 827 else 828 #endif 829 if (uiop->uio_segflg == UIO_SYSSPACE) 830 bcopy(mbufcp, uiocp, xfer); 831 else 832 copyout(mbufcp, uiocp, xfer); 833 left -= xfer; 834 len -= xfer; 835 mbufcp += xfer; 836 uiocp += xfer; 837 uiop->uio_offset += xfer; 838 uiop->uio_resid -= xfer; 839 } 840 if (uiop->uio_iov->iov_len <= siz) { 841 uiop->uio_iovcnt--; 842 uiop->uio_iov++; 843 } else { 844 uiop->uio_iov->iov_base += uiosiz; 845 uiop->uio_iov->iov_len -= uiosiz; 846 } 847 siz -= uiosiz; 848 } 849 *dpos = mbufcp; 850 *mrep = mp; 851 if (rem > 0) { 852 if (len < rem) 853 error = nfs_adv(mrep, dpos, rem, len); 854 else 855 *dpos += rem; 856 } 857 return (error); 858 } 859 860 /* 861 * copies a uio scatter/gather list to an mbuf chain. 862 * NOTE: can ony handle iovcnt == 1 863 */ 864 int 865 nfsm_uiotombuf(uiop, mq, siz, bpos) 866 register struct uio *uiop; 867 struct mbuf **mq; 868 int siz; 869 caddr_t *bpos; 870 { 871 register char *uiocp; 872 register struct mbuf *mp, *mp2; 873 register int xfer, left, mlen; 874 int uiosiz, clflg, rem; 875 char *cp; 876 877 #ifdef DIAGNOSTIC 878 if (uiop->uio_iovcnt != 1) 879 panic("nfsm_uiotombuf: iovcnt != 1"); 880 #endif 881 882 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 883 clflg = 1; 884 else 885 clflg = 0; 886 rem = nfsm_rndup(siz)-siz; 887 mp = mp2 = *mq; 888 while (siz > 0) { 889 left = uiop->uio_iov->iov_len; 890 uiocp = uiop->uio_iov->iov_base; 891 if (left > siz) 892 left = siz; 893 uiosiz = left; 894 while (left > 0) { 895 mlen = M_TRAILINGSPACE(mp); 896 if (mlen == 0) { 897 MGET(mp, M_WAIT, MT_DATA); 898 if (clflg) 899 MCLGET(mp, M_WAIT); 900 mp->m_len = 0; 901 mp2->m_next = mp; 902 mp2 = mp; 903 mlen = M_TRAILINGSPACE(mp); 904 } 905 xfer = (left > mlen) ? mlen : left; 906 #ifdef notdef 907 /* Not Yet.. */ 908 if (uiop->uio_iov->iov_op != NULL) 909 (*(uiop->uio_iov->iov_op)) 910 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 911 else 912 #endif 913 if (uiop->uio_segflg == UIO_SYSSPACE) 914 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 915 else 916 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 917 mp->m_len += xfer; 918 left -= xfer; 919 uiocp += xfer; 920 uiop->uio_offset += xfer; 921 uiop->uio_resid -= xfer; 922 } 923 uiop->uio_iov->iov_base += uiosiz; 924 uiop->uio_iov->iov_len -= uiosiz; 925 siz -= uiosiz; 926 } 927 if (rem > 0) { 928 if (rem > M_TRAILINGSPACE(mp)) { 929 MGET(mp, M_WAIT, MT_DATA); 930 mp->m_len = 0; 931 mp2->m_next = mp; 932 } 933 cp = mtod(mp, caddr_t)+mp->m_len; 934 for (left = 0; left < rem; left++) 935 *cp++ = '\0'; 936 mp->m_len += rem; 937 *bpos = cp; 938 } else 939 *bpos = mtod(mp, caddr_t)+mp->m_len; 940 *mq = mp; 941 return (0); 942 } 943 944 /* 945 * Help break down an mbuf chain by setting the first siz bytes contiguous 946 * pointed to by returned val. 947 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 948 * cases. (The macros use the vars. dpos and dpos2) 949 */ 950 int 951 nfsm_disct(mdp, dposp, siz, left, cp2) 952 struct mbuf **mdp; 953 caddr_t *dposp; 954 int siz; 955 int left; 956 caddr_t *cp2; 957 { 958 register struct mbuf *mp, *mp2; 959 register int siz2, xfer; 960 register caddr_t p; 961 962 mp = *mdp; 963 while (left == 0) { 964 *mdp = mp = mp->m_next; 965 if (mp == NULL) 966 return (EBADRPC); 967 left = mp->m_len; 968 *dposp = mtod(mp, caddr_t); 969 } 970 if (left >= siz) { 971 *cp2 = *dposp; 972 *dposp += siz; 973 } else if (mp->m_next == NULL) { 974 return (EBADRPC); 975 } else if (siz > MHLEN) { 976 panic("nfs S too big"); 977 } else { 978 MGET(mp2, M_WAIT, MT_DATA); 979 mp2->m_next = mp->m_next; 980 mp->m_next = mp2; 981 mp->m_len -= left; 982 mp = mp2; 983 *cp2 = p = mtod(mp, caddr_t); 984 bcopy(*dposp, p, left); /* Copy what was left */ 985 siz2 = siz-left; 986 p += left; 987 mp2 = mp->m_next; 988 /* Loop around copying up the siz2 bytes */ 989 while (siz2 > 0) { 990 if (mp2 == NULL) 991 return (EBADRPC); 992 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 993 if (xfer > 0) { 994 bcopy(mtod(mp2, caddr_t), p, xfer); 995 NFSMADV(mp2, xfer); 996 mp2->m_len -= xfer; 997 p += xfer; 998 siz2 -= xfer; 999 } 1000 if (siz2 > 0) 1001 mp2 = mp2->m_next; 1002 } 1003 mp->m_len = siz; 1004 *mdp = mp2; 1005 *dposp = mtod(mp2, caddr_t); 1006 } 1007 return (0); 1008 } 1009 1010 /* 1011 * Advance the position in the mbuf chain. 1012 */ 1013 int 1014 nfs_adv(mdp, dposp, offs, left) 1015 struct mbuf **mdp; 1016 caddr_t *dposp; 1017 int offs; 1018 int left; 1019 { 1020 register struct mbuf *m; 1021 register int s; 1022 1023 m = *mdp; 1024 s = left; 1025 while (s < offs) { 1026 offs -= s; 1027 m = m->m_next; 1028 if (m == NULL) 1029 return (EBADRPC); 1030 s = m->m_len; 1031 } 1032 *mdp = m; 1033 *dposp = mtod(m, caddr_t)+offs; 1034 return (0); 1035 } 1036 1037 /* 1038 * Copy a string into mbufs for the hard cases... 1039 */ 1040 int 1041 nfsm_strtmbuf(mb, bpos, cp, siz) 1042 struct mbuf **mb; 1043 char **bpos; 1044 const char *cp; 1045 long siz; 1046 { 1047 register struct mbuf *m1 = NULL, *m2; 1048 long left, xfer, len, tlen; 1049 u_int32_t *tl; 1050 int putsize; 1051 1052 putsize = 1; 1053 m2 = *mb; 1054 left = M_TRAILINGSPACE(m2); 1055 if (left > 0) { 1056 tl = ((u_int32_t *)(*bpos)); 1057 *tl++ = txdr_unsigned(siz); 1058 putsize = 0; 1059 left -= NFSX_UNSIGNED; 1060 m2->m_len += NFSX_UNSIGNED; 1061 if (left > 0) { 1062 bcopy(cp, (caddr_t) tl, left); 1063 siz -= left; 1064 cp += left; 1065 m2->m_len += left; 1066 left = 0; 1067 } 1068 } 1069 /* Loop around adding mbufs */ 1070 while (siz > 0) { 1071 MGET(m1, M_WAIT, MT_DATA); 1072 if (siz > MLEN) 1073 MCLGET(m1, M_WAIT); 1074 m1->m_len = NFSMSIZ(m1); 1075 m2->m_next = m1; 1076 m2 = m1; 1077 tl = mtod(m1, u_int32_t *); 1078 tlen = 0; 1079 if (putsize) { 1080 *tl++ = txdr_unsigned(siz); 1081 m1->m_len -= NFSX_UNSIGNED; 1082 tlen = NFSX_UNSIGNED; 1083 putsize = 0; 1084 } 1085 if (siz < m1->m_len) { 1086 len = nfsm_rndup(siz); 1087 xfer = siz; 1088 if (xfer < len) 1089 *(tl+(xfer>>2)) = 0; 1090 } else { 1091 xfer = len = m1->m_len; 1092 } 1093 bcopy(cp, (caddr_t) tl, xfer); 1094 m1->m_len = len+tlen; 1095 siz -= xfer; 1096 cp += xfer; 1097 } 1098 *mb = m1; 1099 *bpos = mtod(m1, caddr_t)+m1->m_len; 1100 return (0); 1101 } 1102 1103 /* 1104 * Called once to initialize data structures... 1105 */ 1106 int 1107 nfs_init(vfsp) 1108 struct vfsconf *vfsp; 1109 { 1110 register int i; 1111 1112 nfsmount_zone = zinit("NFSMOUNT", sizeof(struct nfsmount), 0, 0, 1); 1113 1114 /* 1115 * Check to see if major data structures haven't bloated. 1116 */ 1117 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1118 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1119 printf("Try reducing NFS_UIDHASHSIZ\n"); 1120 } 1121 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1122 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1123 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1124 } 1125 nfs_mount_type = vfsp->vfc_typenum; 1126 nfsrtt.pos = 0; 1127 rpc_vers = txdr_unsigned(RPC_VER2); 1128 rpc_call = txdr_unsigned(RPC_CALL); 1129 rpc_reply = txdr_unsigned(RPC_REPLY); 1130 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1131 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1132 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1133 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1134 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1135 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1136 nfs_prog = txdr_unsigned(NFS_PROG); 1137 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1138 nfs_true = txdr_unsigned(TRUE); 1139 nfs_false = txdr_unsigned(FALSE); 1140 nfs_xdrneg1 = txdr_unsigned(-1); 1141 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1142 if (nfs_ticks < 1) 1143 nfs_ticks = 1; 1144 /* Ensure async daemons disabled */ 1145 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1146 nfs_iodwant[i] = (struct proc *)0; 1147 nfs_iodmount[i] = (struct nfsmount *)0; 1148 } 1149 nfs_nhinit(); /* Init the nfsnode table */ 1150 #ifndef NFS_NOSERVER 1151 nfsrv_init(0); /* Init server data structures */ 1152 nfsrv_initcache(); /* Init the server request cache */ 1153 #endif 1154 1155 /* 1156 * Initialize the nqnfs server stuff. 1157 */ 1158 if (nqnfsstarttime == 0) { 1159 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1160 + nqsrv_clockskew + nqsrv_writeslack; 1161 NQLOADNOVRAM(nqnfsstarttime); 1162 CIRCLEQ_INIT(&nqtimerhead); 1163 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); 1164 } 1165 1166 /* 1167 * Initialize reply list and start timer 1168 */ 1169 TAILQ_INIT(&nfs_reqq); 1170 1171 nfs_timer(0); 1172 1173 /* 1174 * Set up lease_check and lease_updatetime so that other parts 1175 * of the system can call us, if we are loadable. 1176 */ 1177 #ifndef NFS_NOSERVER 1178 nfs_prev_vop_lease_check = default_vnodeop_p[VOFFSET(vop_lease)]; 1179 default_vnodeop_p[VOFFSET(vop_lease)] = (vop_t *)nqnfs_vop_lease_check; 1180 #endif 1181 nfs_prev_lease_updatetime = lease_updatetime; 1182 lease_updatetime = nfs_lease_updatetime; 1183 nfs_prev_nfssvc_sy_narg = sysent[SYS_nfssvc].sy_narg; 1184 sysent[SYS_nfssvc].sy_narg = 2; 1185 nfs_prev_nfssvc_sy_call = sysent[SYS_nfssvc].sy_call; 1186 sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc; 1187 #ifndef NFS_NOSERVER 1188 nfs_prev_getfh_sy_narg = sysent[SYS_getfh].sy_narg; 1189 sysent[SYS_getfh].sy_narg = 2; 1190 nfs_prev_getfh_sy_call = sysent[SYS_getfh].sy_call; 1191 sysent[SYS_getfh].sy_call = (sy_call_t *)getfh; 1192 #endif 1193 1194 return (0); 1195 } 1196 1197 int 1198 nfs_uninit(vfsp) 1199 struct vfsconf *vfsp; 1200 { 1201 1202 untimeout(nfs_timer, (void *)NULL, nfs_timer_handle); 1203 nfs_mount_type = -1; 1204 #ifndef NFS_NOSERVER 1205 default_vnodeop_p[VOFFSET(vop_lease)] = nfs_prev_vop_lease_check; 1206 #endif 1207 lease_updatetime = nfs_prev_lease_updatetime; 1208 sysent[SYS_nfssvc].sy_narg = nfs_prev_nfssvc_sy_narg; 1209 sysent[SYS_nfssvc].sy_call = nfs_prev_nfssvc_sy_call; 1210 #ifndef NFS_NOSERVER 1211 sysent[SYS_getfh].sy_narg = nfs_prev_getfh_sy_narg; 1212 sysent[SYS_getfh].sy_call = nfs_prev_getfh_sy_call; 1213 #endif 1214 return (0); 1215 } 1216 1217 /* 1218 * Attribute cache routines. 1219 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1220 * that are on the mbuf list 1221 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1222 * error otherwise 1223 */ 1224 1225 /* 1226 * Load the attribute cache (that lives in the nfsnode entry) with 1227 * the values on the mbuf list and 1228 * Iff vap not NULL 1229 * copy the attributes to *vaper 1230 */ 1231 int 1232 nfs_loadattrcache(vpp, mdp, dposp, vaper) 1233 struct vnode **vpp; 1234 struct mbuf **mdp; 1235 caddr_t *dposp; 1236 struct vattr *vaper; 1237 { 1238 register struct vnode *vp = *vpp; 1239 register struct vattr *vap; 1240 register struct nfs_fattr *fp; 1241 register struct nfsnode *np; 1242 register int32_t t1; 1243 caddr_t cp2; 1244 int error = 0, rdev; 1245 struct mbuf *md; 1246 enum vtype vtyp; 1247 u_short vmode; 1248 struct timespec mtime; 1249 struct vnode *nvp; 1250 int v3 = NFS_ISV3(vp); 1251 1252 md = *mdp; 1253 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1254 if (error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) 1255 return (error); 1256 fp = (struct nfs_fattr *)cp2; 1257 if (v3) { 1258 vtyp = nfsv3tov_type(fp->fa_type); 1259 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1260 rdev = makedev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), 1261 fxdr_unsigned(int, fp->fa3_rdev.specdata2)); 1262 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1263 } else { 1264 vtyp = nfsv2tov_type(fp->fa_type); 1265 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1266 /* 1267 * XXX 1268 * 1269 * The duplicate information returned in fa_type and fa_mode 1270 * is an ambiguity in the NFS version 2 protocol. 1271 * 1272 * VREG should be taken literally as a regular file. If a 1273 * server intents to return some type information differently 1274 * in the upper bits of the mode field (e.g. for sockets, or 1275 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1276 * leave the examination of the mode bits even in the VREG 1277 * case to avoid breakage for bogus servers, but we make sure 1278 * that there are actually type bits set in the upper part of 1279 * fa_mode (and failing that, trust the va_type field). 1280 * 1281 * NFSv3 cleared the issue, and requires fa_mode to not 1282 * contain any type information (while also introduing sockets 1283 * and FIFOs for fa_type). 1284 */ 1285 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1286 vtyp = IFTOVT(vmode); 1287 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1288 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1289 1290 /* 1291 * Really ugly NFSv2 kludge. 1292 */ 1293 if (vtyp == VCHR && rdev == 0xffffffff) 1294 vtyp = VFIFO; 1295 } 1296 1297 /* 1298 * If v_type == VNON it is a new node, so fill in the v_type, 1299 * n_mtime fields. Check to see if it represents a special 1300 * device, and if so, check for a possible alias. Once the 1301 * correct vnode has been obtained, fill in the rest of the 1302 * information. 1303 */ 1304 np = VTONFS(vp); 1305 if (vp->v_type != vtyp) { 1306 vp->v_type = vtyp; 1307 if (vp->v_type == VFIFO) { 1308 vp->v_op = fifo_nfsv2nodeop_p; 1309 } 1310 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1311 vp->v_op = spec_nfsv2nodeop_p; 1312 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1313 if (nvp) { 1314 /* 1315 * Discard unneeded vnode, but save its nfsnode. 1316 * Since the nfsnode does not have a lock, its 1317 * vnode lock has to be carried over. 1318 */ 1319 nvp->v_vnlock = vp->v_vnlock; 1320 vp->v_vnlock = NULL; 1321 nvp->v_data = vp->v_data; 1322 vp->v_data = NULL; 1323 vp->v_op = spec_vnodeop_p; 1324 vrele(vp); 1325 vgone(vp); 1326 /* 1327 * Reinitialize aliased node. 1328 */ 1329 np->n_vnode = nvp; 1330 *vpp = vp = nvp; 1331 } 1332 } 1333 np->n_mtime = mtime.tv_sec; 1334 } 1335 vap = &np->n_vattr; 1336 vap->va_type = vtyp; 1337 vap->va_mode = (vmode & 07777); 1338 vap->va_rdev = (dev_t)rdev; 1339 vap->va_mtime = mtime; 1340 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1341 if (v3) { 1342 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1343 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1344 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1345 fxdr_hyper(&fp->fa3_size, &vap->va_size); 1346 vap->va_blocksize = NFS_FABLKSIZE; 1347 fxdr_hyper(&fp->fa3_used, &vap->va_bytes); 1348 vap->va_fileid = fxdr_unsigned(int32_t, 1349 fp->fa3_fileid.nfsuquad[1]); 1350 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1351 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1352 vap->va_flags = 0; 1353 vap->va_filerev = 0; 1354 } else { 1355 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1356 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1357 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1358 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1359 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); 1360 vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) 1361 * NFS_FABLKSIZE; 1362 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1363 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1364 vap->va_flags = 0; 1365 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1366 fp->fa2_ctime.nfsv2_sec); 1367 vap->va_ctime.tv_nsec = 0; 1368 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1369 vap->va_filerev = 0; 1370 } 1371 if (vap->va_size != np->n_size) { 1372 if (vap->va_type == VREG) { 1373 if (np->n_flag & NMODIFIED) { 1374 if (vap->va_size < np->n_size) 1375 vap->va_size = np->n_size; 1376 else 1377 np->n_size = vap->va_size; 1378 } else 1379 np->n_size = vap->va_size; 1380 vnode_pager_setsize(vp, np->n_size); 1381 } else 1382 np->n_size = vap->va_size; 1383 } 1384 np->n_attrstamp = time_second; 1385 if (vaper != NULL) { 1386 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1387 if (np->n_flag & NCHG) { 1388 if (np->n_flag & NACC) 1389 vaper->va_atime = np->n_atim; 1390 if (np->n_flag & NUPD) 1391 vaper->va_mtime = np->n_mtim; 1392 } 1393 } 1394 return (0); 1395 } 1396 1397 #ifdef NFS_ACDEBUG 1398 #include <sys/sysctl.h> 1399 static int nfs_acdebug; 1400 SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, ""); 1401 #endif 1402 1403 /* 1404 * Check the time stamp 1405 * If the cache is valid, copy contents to *vap and return 0 1406 * otherwise return an error 1407 */ 1408 int 1409 nfs_getattrcache(vp, vaper) 1410 register struct vnode *vp; 1411 struct vattr *vaper; 1412 { 1413 register struct nfsnode *np; 1414 register struct vattr *vap; 1415 struct nfsmount *nmp; 1416 int timeo; 1417 1418 np = VTONFS(vp); 1419 vap = &np->n_vattr; 1420 nmp = VFSTONFS(vp->v_mount); 1421 /* XXX n_mtime doesn't seem to be updated on a miss-and-reload */ 1422 timeo = (time_second - np->n_mtime) / 10; 1423 1424 #ifdef NFS_ACDEBUG 1425 if (nfs_acdebug>1) 1426 printf("nfs_getattrcache: initial timeo = %d\n", timeo); 1427 #endif 1428 1429 if (vap->va_type == VDIR) { 1430 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin) 1431 timeo = nmp->nm_acdirmin; 1432 else if (timeo > nmp->nm_acdirmax) 1433 timeo = nmp->nm_acdirmax; 1434 } else { 1435 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin) 1436 timeo = nmp->nm_acregmin; 1437 else if (timeo > nmp->nm_acregmax) 1438 timeo = nmp->nm_acregmax; 1439 } 1440 1441 #ifdef NFS_ACDEBUG 1442 if (nfs_acdebug > 2) 1443 printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n", 1444 nmp->nm_acregmin, nmp->nm_acregmax, 1445 nmp->nm_acdirmin, nmp->nm_acdirmax); 1446 1447 if (nfs_acdebug) 1448 printf("nfs_getattrcache: age = %d; final timeo = %d\n", 1449 (time_second - np->n_attrstamp), timeo); 1450 #endif 1451 1452 if ((time_second - np->n_attrstamp) >= timeo) { 1453 nfsstats.attrcache_misses++; 1454 return (ENOENT); 1455 } 1456 nfsstats.attrcache_hits++; 1457 if (vap->va_size != np->n_size) { 1458 if (vap->va_type == VREG) { 1459 if (np->n_flag & NMODIFIED) { 1460 if (vap->va_size < np->n_size) 1461 vap->va_size = np->n_size; 1462 else 1463 np->n_size = vap->va_size; 1464 } else 1465 np->n_size = vap->va_size; 1466 vnode_pager_setsize(vp, np->n_size); 1467 } else 1468 np->n_size = vap->va_size; 1469 } 1470 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1471 if (np->n_flag & NCHG) { 1472 if (np->n_flag & NACC) 1473 vaper->va_atime = np->n_atim; 1474 if (np->n_flag & NUPD) 1475 vaper->va_mtime = np->n_mtim; 1476 } 1477 return (0); 1478 } 1479 1480 #ifndef NFS_NOSERVER 1481 /* 1482 * Set up nameidata for a lookup() call and do it. 1483 * 1484 * If pubflag is set, this call is done for a lookup operation on the 1485 * public filehandle. In that case we allow crossing mountpoints and 1486 * absolute pathnames. However, the caller is expected to check that 1487 * the lookup result is within the public fs, and deny access if 1488 * it is not. 1489 * 1490 * nfs_namei() clears out garbage fields that namei() might leave garbage. 1491 * This is mainly ni_vp and ni_dvp when an error occurs, and ni_dvp when no 1492 * error occurs but the parent was not requested. 1493 * 1494 * dirp may be set whether an error is returned or not, and must be 1495 * released by the caller. 1496 */ 1497 int 1498 nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1499 register struct nameidata *ndp; 1500 fhandle_t *fhp; 1501 int len; 1502 struct nfssvc_sock *slp; 1503 struct sockaddr *nam; 1504 struct mbuf **mdp; 1505 caddr_t *dposp; 1506 struct vnode **retdirp; 1507 struct proc *p; 1508 int kerbflag, pubflag; 1509 { 1510 register int i, rem; 1511 register struct mbuf *md; 1512 register char *fromcp, *tocp, *cp; 1513 struct iovec aiov; 1514 struct uio auio; 1515 struct vnode *dp; 1516 int error, rdonly, linklen; 1517 struct componentname *cnp = &ndp->ni_cnd; 1518 1519 *retdirp = (struct vnode *)0; 1520 cnp->cn_pnbuf = zalloc(namei_zone); 1521 1522 /* 1523 * Copy the name from the mbuf list to ndp->ni_pnbuf 1524 * and set the various ndp fields appropriately. 1525 */ 1526 fromcp = *dposp; 1527 tocp = cnp->cn_pnbuf; 1528 md = *mdp; 1529 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1530 cnp->cn_hash = 0; 1531 for (i = 0; i < len; i++) { 1532 while (rem == 0) { 1533 md = md->m_next; 1534 if (md == NULL) { 1535 error = EBADRPC; 1536 goto out; 1537 } 1538 fromcp = mtod(md, caddr_t); 1539 rem = md->m_len; 1540 } 1541 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1542 error = EACCES; 1543 goto out; 1544 } 1545 cnp->cn_hash += (unsigned char)*fromcp; 1546 *tocp++ = *fromcp++; 1547 rem--; 1548 } 1549 *tocp = '\0'; 1550 *mdp = md; 1551 *dposp = fromcp; 1552 len = nfsm_rndup(len)-len; 1553 if (len > 0) { 1554 if (rem >= len) 1555 *dposp += len; 1556 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1557 goto out; 1558 } 1559 1560 /* 1561 * Extract and set starting directory. 1562 */ 1563 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1564 nam, &rdonly, kerbflag, pubflag); 1565 if (error) 1566 goto out; 1567 if (dp->v_type != VDIR) { 1568 vrele(dp); 1569 error = ENOTDIR; 1570 goto out; 1571 } 1572 1573 if (rdonly) 1574 cnp->cn_flags |= RDONLY; 1575 1576 /* 1577 * Set return directory. Reference to dp is implicitly transfered 1578 * to the returned pointer 1579 */ 1580 *retdirp = dp; 1581 1582 if (pubflag) { 1583 /* 1584 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1585 * and the 'native path' indicator. 1586 */ 1587 cp = zalloc(namei_zone); 1588 fromcp = cnp->cn_pnbuf; 1589 tocp = cp; 1590 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1591 switch ((unsigned char)*fromcp) { 1592 case WEBNFS_NATIVE_CHAR: 1593 /* 1594 * 'Native' path for us is the same 1595 * as a path according to the NFS spec, 1596 * just skip the escape char. 1597 */ 1598 fromcp++; 1599 break; 1600 /* 1601 * More may be added in the future, range 0x80-0xff 1602 */ 1603 default: 1604 error = EIO; 1605 zfree(namei_zone, cp); 1606 goto out; 1607 } 1608 } 1609 /* 1610 * Translate the '%' escapes, URL-style. 1611 */ 1612 while (*fromcp != '\0') { 1613 if (*fromcp == WEBNFS_ESC_CHAR) { 1614 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1615 fromcp++; 1616 *tocp++ = HEXSTRTOI(fromcp); 1617 fromcp += 2; 1618 continue; 1619 } else { 1620 error = ENOENT; 1621 zfree(namei_zone, cp); 1622 goto out; 1623 } 1624 } else 1625 *tocp++ = *fromcp++; 1626 } 1627 *tocp = '\0'; 1628 zfree(namei_zone, cnp->cn_pnbuf); 1629 cnp->cn_pnbuf = cp; 1630 } 1631 1632 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1633 ndp->ni_segflg = UIO_SYSSPACE; 1634 1635 if (pubflag) { 1636 ndp->ni_rootdir = rootvnode; 1637 ndp->ni_loopcnt = 0; 1638 if (cnp->cn_pnbuf[0] == '/') 1639 dp = rootvnode; 1640 } else { 1641 cnp->cn_flags |= NOCROSSMOUNT; 1642 } 1643 1644 /* 1645 * Initialize for scan, set ni_startdir and bump ref on dp again 1646 * becuase lookup() will dereference ni_startdir. 1647 */ 1648 1649 cnp->cn_proc = p; 1650 VREF(dp); 1651 ndp->ni_startdir = dp; 1652 1653 for (;;) { 1654 cnp->cn_nameptr = cnp->cn_pnbuf; 1655 /* 1656 * Call lookup() to do the real work. If an error occurs, 1657 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 1658 * we do not have to dereference anything before returning. 1659 * In either case ni_startdir will be dereferenced and NULLed 1660 * out. 1661 */ 1662 error = lookup(ndp); 1663 if (error) 1664 break; 1665 1666 /* 1667 * Check for encountering a symbolic link. Trivial 1668 * termination occurs if no symlink encountered. 1669 * Note: zfree is safe because error is 0, so we will 1670 * not zfree it again when we break. 1671 */ 1672 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1673 nfsrv_object_create(ndp->ni_vp); 1674 if (cnp->cn_flags & (SAVENAME | SAVESTART)) 1675 cnp->cn_flags |= HASBUF; 1676 else 1677 zfree(namei_zone, cnp->cn_pnbuf); 1678 break; 1679 } 1680 1681 /* 1682 * Validate symlink 1683 */ 1684 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1685 VOP_UNLOCK(ndp->ni_dvp, 0, p); 1686 if (!pubflag) { 1687 error = EINVAL; 1688 goto badlink2; 1689 } 1690 1691 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1692 error = ELOOP; 1693 goto badlink2; 1694 } 1695 if (ndp->ni_pathlen > 1) 1696 cp = zalloc(namei_zone); 1697 else 1698 cp = cnp->cn_pnbuf; 1699 aiov.iov_base = cp; 1700 aiov.iov_len = MAXPATHLEN; 1701 auio.uio_iov = &aiov; 1702 auio.uio_iovcnt = 1; 1703 auio.uio_offset = 0; 1704 auio.uio_rw = UIO_READ; 1705 auio.uio_segflg = UIO_SYSSPACE; 1706 auio.uio_procp = (struct proc *)0; 1707 auio.uio_resid = MAXPATHLEN; 1708 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1709 if (error) { 1710 badlink1: 1711 if (ndp->ni_pathlen > 1) 1712 zfree(namei_zone, cp); 1713 badlink2: 1714 vrele(ndp->ni_dvp); 1715 vput(ndp->ni_vp); 1716 break; 1717 } 1718 linklen = MAXPATHLEN - auio.uio_resid; 1719 if (linklen == 0) { 1720 error = ENOENT; 1721 goto badlink1; 1722 } 1723 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1724 error = ENAMETOOLONG; 1725 goto badlink1; 1726 } 1727 1728 /* 1729 * Adjust or replace path 1730 */ 1731 if (ndp->ni_pathlen > 1) { 1732 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 1733 zfree(namei_zone, cnp->cn_pnbuf); 1734 cnp->cn_pnbuf = cp; 1735 } else 1736 cnp->cn_pnbuf[linklen] = '\0'; 1737 ndp->ni_pathlen += linklen; 1738 1739 /* 1740 * Cleanup refs for next loop and check if root directory 1741 * should replace current directory. Normally ni_dvp 1742 * becomes the new base directory and is cleaned up when 1743 * we loop. Explicitly null pointers after invalidation 1744 * to clarify operation. 1745 */ 1746 vput(ndp->ni_vp); 1747 ndp->ni_vp = NULL; 1748 1749 if (cnp->cn_pnbuf[0] == '/') { 1750 vrele(ndp->ni_dvp); 1751 ndp->ni_dvp = ndp->ni_rootdir; 1752 VREF(ndp->ni_dvp); 1753 } 1754 ndp->ni_startdir = ndp->ni_dvp; 1755 ndp->ni_dvp = NULL; 1756 } 1757 1758 /* 1759 * nfs_namei() guarentees that fields will not contain garbage 1760 * whether an error occurs or not. This allows the caller to track 1761 * cleanup state trivially. 1762 */ 1763 out: 1764 if (error) { 1765 zfree(namei_zone, cnp->cn_pnbuf); 1766 ndp->ni_vp = NULL; 1767 ndp->ni_dvp = NULL; 1768 ndp->ni_startdir = NULL; 1769 cnp->cn_flags &= ~HASBUF; 1770 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 1771 ndp->ni_dvp = NULL; 1772 } 1773 return (error); 1774 } 1775 1776 /* 1777 * A fiddled version of m_adj() that ensures null fill to a long 1778 * boundary and only trims off the back end 1779 */ 1780 void 1781 nfsm_adj(mp, len, nul) 1782 struct mbuf *mp; 1783 register int len; 1784 int nul; 1785 { 1786 register struct mbuf *m; 1787 register int count, i; 1788 register char *cp; 1789 1790 /* 1791 * Trim from tail. Scan the mbuf chain, 1792 * calculating its length and finding the last mbuf. 1793 * If the adjustment only affects this mbuf, then just 1794 * adjust and return. Otherwise, rescan and truncate 1795 * after the remaining size. 1796 */ 1797 count = 0; 1798 m = mp; 1799 for (;;) { 1800 count += m->m_len; 1801 if (m->m_next == (struct mbuf *)0) 1802 break; 1803 m = m->m_next; 1804 } 1805 if (m->m_len > len) { 1806 m->m_len -= len; 1807 if (nul > 0) { 1808 cp = mtod(m, caddr_t)+m->m_len-nul; 1809 for (i = 0; i < nul; i++) 1810 *cp++ = '\0'; 1811 } 1812 return; 1813 } 1814 count -= len; 1815 if (count < 0) 1816 count = 0; 1817 /* 1818 * Correct length for chain is "count". 1819 * Find the mbuf with last data, adjust its length, 1820 * and toss data from remaining mbufs on chain. 1821 */ 1822 for (m = mp; m; m = m->m_next) { 1823 if (m->m_len >= count) { 1824 m->m_len = count; 1825 if (nul > 0) { 1826 cp = mtod(m, caddr_t)+m->m_len-nul; 1827 for (i = 0; i < nul; i++) 1828 *cp++ = '\0'; 1829 } 1830 break; 1831 } 1832 count -= m->m_len; 1833 } 1834 for (m = m->m_next;m;m = m->m_next) 1835 m->m_len = 0; 1836 } 1837 1838 /* 1839 * Make these functions instead of macros, so that the kernel text size 1840 * doesn't get too big... 1841 */ 1842 void 1843 nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1844 struct nfsrv_descript *nfsd; 1845 int before_ret; 1846 register struct vattr *before_vap; 1847 int after_ret; 1848 struct vattr *after_vap; 1849 struct mbuf **mbp; 1850 char **bposp; 1851 { 1852 register struct mbuf *mb = *mbp, *mb2; 1853 register char *bpos = *bposp; 1854 register u_int32_t *tl; 1855 1856 if (before_ret) { 1857 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1858 *tl = nfs_false; 1859 } else { 1860 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 1861 *tl++ = nfs_true; 1862 txdr_hyper(&(before_vap->va_size), tl); 1863 tl += 2; 1864 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1865 tl += 2; 1866 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1867 } 1868 *bposp = bpos; 1869 *mbp = mb; 1870 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1871 } 1872 1873 void 1874 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1875 struct nfsrv_descript *nfsd; 1876 int after_ret; 1877 struct vattr *after_vap; 1878 struct mbuf **mbp; 1879 char **bposp; 1880 { 1881 register struct mbuf *mb = *mbp, *mb2; 1882 register char *bpos = *bposp; 1883 register u_int32_t *tl; 1884 register struct nfs_fattr *fp; 1885 1886 if (after_ret) { 1887 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1888 *tl = nfs_false; 1889 } else { 1890 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 1891 *tl++ = nfs_true; 1892 fp = (struct nfs_fattr *)tl; 1893 nfsm_srvfattr(nfsd, after_vap, fp); 1894 } 1895 *mbp = mb; 1896 *bposp = bpos; 1897 } 1898 1899 void 1900 nfsm_srvfattr(nfsd, vap, fp) 1901 register struct nfsrv_descript *nfsd; 1902 register struct vattr *vap; 1903 register struct nfs_fattr *fp; 1904 { 1905 1906 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1907 fp->fa_uid = txdr_unsigned(vap->va_uid); 1908 fp->fa_gid = txdr_unsigned(vap->va_gid); 1909 if (nfsd->nd_flag & ND_NFSV3) { 1910 fp->fa_type = vtonfsv3_type(vap->va_type); 1911 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1912 txdr_hyper(&vap->va_size, &fp->fa3_size); 1913 txdr_hyper(&vap->va_bytes, &fp->fa3_used); 1914 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 1915 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 1916 fp->fa3_fsid.nfsuquad[0] = 0; 1917 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1918 fp->fa3_fileid.nfsuquad[0] = 0; 1919 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1920 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1921 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1922 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1923 } else { 1924 fp->fa_type = vtonfsv2_type(vap->va_type); 1925 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1926 fp->fa2_size = txdr_unsigned(vap->va_size); 1927 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1928 if (vap->va_type == VFIFO) 1929 fp->fa2_rdev = 0xffffffff; 1930 else 1931 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1932 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1933 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1934 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1935 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1936 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1937 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1938 } 1939 } 1940 1941 /* 1942 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1943 * - look up fsid in mount list (if not found ret error) 1944 * - get vp and export rights by calling VFS_FHTOVP() 1945 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1946 * - if not lockflag unlock it with VOP_UNLOCK() 1947 */ 1948 int 1949 nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 1950 fhandle_t *fhp; 1951 int lockflag; 1952 struct vnode **vpp; 1953 struct ucred *cred; 1954 struct nfssvc_sock *slp; 1955 struct sockaddr *nam; 1956 int *rdonlyp; 1957 int kerbflag; 1958 int pubflag; 1959 { 1960 struct proc *p = curproc; /* XXX */ 1961 register struct mount *mp; 1962 register int i; 1963 struct ucred *credanon; 1964 int error, exflags; 1965 #ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */ 1966 struct sockaddr_int *saddr; 1967 #endif 1968 1969 *vpp = (struct vnode *)0; 1970 1971 if (nfs_ispublicfh(fhp)) { 1972 if (!pubflag || !nfs_pub.np_valid) 1973 return (ESTALE); 1974 fhp = &nfs_pub.np_handle; 1975 } 1976 1977 mp = vfs_getvfs(&fhp->fh_fsid); 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 #ifdef MNT_EXNORESPORT 1984 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 1985 saddr = (struct sockaddr_in *)nam; 1986 if (saddr->sin_family == AF_INET && 1987 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 1988 vput(*vpp); 1989 *vpp = NULL; 1990 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1991 } 1992 } 1993 #endif 1994 /* 1995 * Check/setup credentials. 1996 */ 1997 if (exflags & MNT_EXKERB) { 1998 if (!kerbflag) { 1999 vput(*vpp); 2000 *vpp = NULL; 2001 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2002 } 2003 } else if (kerbflag) { 2004 vput(*vpp); 2005 *vpp = NULL; 2006 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2007 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 2008 cred->cr_uid = credanon->cr_uid; 2009 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 2010 cred->cr_groups[i] = credanon->cr_groups[i]; 2011 cred->cr_ngroups = i; 2012 } 2013 if (exflags & MNT_EXRDONLY) 2014 *rdonlyp = 1; 2015 else 2016 *rdonlyp = 0; 2017 2018 nfsrv_object_create(*vpp); 2019 2020 if (!lockflag) 2021 VOP_UNLOCK(*vpp, 0, p); 2022 return (0); 2023 } 2024 2025 2026 /* 2027 * WebNFS: check if a filehandle is a public filehandle. For v3, this 2028 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 2029 * transformed this to all zeroes in both cases, so check for it. 2030 */ 2031 int 2032 nfs_ispublicfh(fhp) 2033 fhandle_t *fhp; 2034 { 2035 char *cp = (char *)fhp; 2036 int i; 2037 2038 for (i = 0; i < NFSX_V3FH; i++) 2039 if (*cp++ != 0) 2040 return (FALSE); 2041 return (TRUE); 2042 } 2043 2044 #endif /* NFS_NOSERVER */ 2045 /* 2046 * This function compares two net addresses by family and returns TRUE 2047 * if they are the same host. 2048 * If there is any doubt, return FALSE. 2049 * The AF_INET family is handled as a special case so that address mbufs 2050 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 2051 */ 2052 int 2053 netaddr_match(family, haddr, nam) 2054 int family; 2055 union nethostaddr *haddr; 2056 struct sockaddr *nam; 2057 { 2058 register struct sockaddr_in *inetaddr; 2059 2060 switch (family) { 2061 case AF_INET: 2062 inetaddr = (struct sockaddr_in *)nam; 2063 if (inetaddr->sin_family == AF_INET && 2064 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 2065 return (1); 2066 break; 2067 #ifdef ISO 2068 case AF_ISO: 2069 { 2070 register struct sockaddr_iso *isoaddr1, *isoaddr2; 2071 2072 isoaddr1 = (struct sockaddr_iso *)nam; 2073 isoaddr2 = (struct sockaddr_iso *)haddr->had_nam; 2074 if (isoaddr1->siso_family == AF_ISO && 2075 isoaddr1->siso_nlen > 0 && 2076 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 2077 SAME_ISOADDR(isoaddr1, isoaddr2)) 2078 return (1); 2079 break; 2080 } 2081 #endif /* ISO */ 2082 default: 2083 break; 2084 }; 2085 return (0); 2086 } 2087 2088 static nfsuint64 nfs_nullcookie = { 0, 0 }; 2089 /* 2090 * This function finds the directory cookie that corresponds to the 2091 * logical byte offset given. 2092 */ 2093 nfsuint64 * 2094 nfs_getcookie(np, off, add) 2095 register struct nfsnode *np; 2096 off_t off; 2097 int add; 2098 { 2099 register struct nfsdmap *dp, *dp2; 2100 register int pos; 2101 2102 pos = (uoff_t)off / NFS_DIRBLKSIZ; 2103 if (pos == 0 || off < 0) { 2104 #ifdef DIAGNOSTIC 2105 if (add) 2106 panic("nfs getcookie add at <= 0"); 2107 #endif 2108 return (&nfs_nullcookie); 2109 } 2110 pos--; 2111 dp = np->n_cookies.lh_first; 2112 if (!dp) { 2113 if (add) { 2114 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 2115 M_NFSDIROFF, M_WAITOK); 2116 dp->ndm_eocookie = 0; 2117 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 2118 } else 2119 return ((nfsuint64 *)0); 2120 } 2121 while (pos >= NFSNUMCOOKIES) { 2122 pos -= NFSNUMCOOKIES; 2123 if (dp->ndm_list.le_next) { 2124 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 2125 pos >= dp->ndm_eocookie) 2126 return ((nfsuint64 *)0); 2127 dp = dp->ndm_list.le_next; 2128 } else if (add) { 2129 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 2130 M_NFSDIROFF, M_WAITOK); 2131 dp2->ndm_eocookie = 0; 2132 LIST_INSERT_AFTER(dp, dp2, ndm_list); 2133 dp = dp2; 2134 } else 2135 return ((nfsuint64 *)0); 2136 } 2137 if (pos >= dp->ndm_eocookie) { 2138 if (add) 2139 dp->ndm_eocookie = pos + 1; 2140 else 2141 return ((nfsuint64 *)0); 2142 } 2143 return (&dp->ndm_cookies[pos]); 2144 } 2145 2146 /* 2147 * Invalidate cached directory information, except for the actual directory 2148 * blocks (which are invalidated separately). 2149 * Done mainly to avoid the use of stale offset cookies. 2150 */ 2151 void 2152 nfs_invaldir(vp) 2153 register struct vnode *vp; 2154 { 2155 register struct nfsnode *np = VTONFS(vp); 2156 2157 #ifdef DIAGNOSTIC 2158 if (vp->v_type != VDIR) 2159 panic("nfs: invaldir not dir"); 2160 #endif 2161 np->n_direofoffset = 0; 2162 np->n_cookieverf.nfsuquad[0] = 0; 2163 np->n_cookieverf.nfsuquad[1] = 0; 2164 if (np->n_cookies.lh_first) 2165 np->n_cookies.lh_first->ndm_eocookie = 0; 2166 } 2167 2168 /* 2169 * The write verifier has changed (probably due to a server reboot), so all 2170 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2171 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2172 * flag. Once done the new write verifier can be set for the mount point. 2173 */ 2174 void 2175 nfs_clearcommit(mp) 2176 struct mount *mp; 2177 { 2178 register struct vnode *vp, *nvp; 2179 register struct buf *bp, *nbp; 2180 int s; 2181 2182 s = splbio(); 2183 loop: 2184 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2185 if (vp->v_mount != mp) /* Paranoia */ 2186 goto loop; 2187 nvp = vp->v_mntvnodes.le_next; 2188 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 2189 nbp = TAILQ_NEXT(bp, b_vnbufs); 2190 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2191 == (B_DELWRI | B_NEEDCOMMIT)) 2192 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 2193 } 2194 } 2195 splx(s); 2196 } 2197 2198 #ifndef NFS_NOSERVER 2199 /* 2200 * Map errnos to NFS error numbers. For Version 3 also filter out error 2201 * numbers not specified for the associated procedure. 2202 */ 2203 int 2204 nfsrv_errmap(nd, err) 2205 struct nfsrv_descript *nd; 2206 register int err; 2207 { 2208 register short *defaulterrp, *errp; 2209 2210 if (nd->nd_flag & ND_NFSV3) { 2211 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2212 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2213 while (*++errp) { 2214 if (*errp == err) 2215 return (err); 2216 else if (*errp > err) 2217 break; 2218 } 2219 return ((int)*defaulterrp); 2220 } else 2221 return (err & 0xffff); 2222 } 2223 if (err <= ELAST) 2224 return ((int)nfsrv_v2errmap[err - 1]); 2225 return (NFSERR_IO); 2226 } 2227 2228 int 2229 nfsrv_object_create(vp) 2230 struct vnode *vp; 2231 { 2232 2233 if (vp == NULL || vp->v_type != VREG) 2234 return (1); 2235 return (vfs_object_create(vp, curproc, 2236 curproc ? curproc->p_ucred : NULL)); 2237 } 2238 2239 /* 2240 * Sort the group list in increasing numerical order. 2241 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 2242 * that used to be here.) 2243 */ 2244 void 2245 nfsrvw_sort(list, num) 2246 register gid_t *list; 2247 register int num; 2248 { 2249 register int i, j; 2250 gid_t v; 2251 2252 /* Insertion sort. */ 2253 for (i = 1; i < num; i++) { 2254 v = list[i]; 2255 /* find correct slot for value v, moving others up */ 2256 for (j = i; --j >= 0 && v < list[j];) 2257 list[j + 1] = list[j]; 2258 list[j + 1] = v; 2259 } 2260 } 2261 2262 /* 2263 * copy credentials making sure that the result can be compared with bcmp(). 2264 */ 2265 void 2266 nfsrv_setcred(incred, outcred) 2267 register struct ucred *incred, *outcred; 2268 { 2269 register int i; 2270 2271 bzero((caddr_t)outcred, sizeof (struct ucred)); 2272 outcred->cr_ref = 1; 2273 outcred->cr_uid = incred->cr_uid; 2274 outcred->cr_ngroups = incred->cr_ngroups; 2275 for (i = 0; i < incred->cr_ngroups; i++) 2276 outcred->cr_groups[i] = incred->cr_groups[i]; 2277 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 2278 } 2279 #endif /* NFS_NOSERVER */
Cache object: b5497dfd1b6382a2cb148226e6fd1405
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