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: /repoman/r/ncvs/src/sys/nfsclient/nfs_subs.c,v 1.128 2004/04/14 23:23:55 peadar Exp $ 38 * $DragonFly: src/sys/vfs/nfs/nfs_subs.c,v 1.20 2004/08/17 18:57:34 dillon Exp $ 39 */ 40 41 /* 42 * These functions support the macros and help fiddle mbuf chains for 43 * the nfs op functions. They do things like create the rpc header and 44 * copy data between mbuf chains and uio lists. 45 */ 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/kernel.h> 49 #include <sys/buf.h> 50 #include <sys/proc.h> 51 #include <sys/mount.h> 52 #include <sys/vnode.h> 53 #include <sys/namei.h> 54 #include <sys/mbuf.h> 55 #include <sys/socket.h> 56 #include <sys/stat.h> 57 #include <sys/malloc.h> 58 #include <sys/sysent.h> 59 #include <sys/syscall.h> 60 #include <sys/conf.h> 61 62 #include <vm/vm.h> 63 #include <vm/vm_object.h> 64 #include <vm/vm_extern.h> 65 #include <vm/vm_zone.h> 66 67 #include <sys/buf2.h> 68 69 #include "rpcv2.h" 70 #include "nfsproto.h" 71 #include "nfs.h" 72 #include "nfsmount.h" 73 #include "nfsnode.h" 74 #include "xdr_subs.h" 75 #include "nfsm_subs.h" 76 #include "nqnfs.h" 77 #include "nfsrtt.h" 78 79 #include <netinet/in.h> 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 static enum vtype nv2tov_type[8]= { 94 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON 95 }; 96 enum vtype nv3tov_type[8]= { 97 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO 98 }; 99 100 int nfs_ticks; 101 int nfs_pbuf_freecnt = -1; /* start out unlimited */ 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) (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 int (*nfs_prev_vop_lease_check)(struct vop_lease_args *); 120 121 /* 122 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 123 */ 124 int nfsv3_procid[NFS_NPROCS] = { 125 NFSPROC_NULL, 126 NFSPROC_GETATTR, 127 NFSPROC_SETATTR, 128 NFSPROC_NOOP, 129 NFSPROC_LOOKUP, 130 NFSPROC_READLINK, 131 NFSPROC_READ, 132 NFSPROC_NOOP, 133 NFSPROC_WRITE, 134 NFSPROC_CREATE, 135 NFSPROC_REMOVE, 136 NFSPROC_RENAME, 137 NFSPROC_LINK, 138 NFSPROC_SYMLINK, 139 NFSPROC_MKDIR, 140 NFSPROC_RMDIR, 141 NFSPROC_READDIR, 142 NFSPROC_FSSTAT, 143 NFSPROC_NOOP, 144 NFSPROC_NOOP, 145 NFSPROC_NOOP, 146 NFSPROC_NOOP, 147 NFSPROC_NOOP, 148 NFSPROC_NOOP, 149 NFSPROC_NOOP, 150 NFSPROC_NOOP 151 }; 152 153 #endif /* NFS_NOSERVER */ 154 /* 155 * and the reverse mapping from generic to Version 2 procedure numbers 156 */ 157 int nfsv2_procid[NFS_NPROCS] = { 158 NFSV2PROC_NULL, 159 NFSV2PROC_GETATTR, 160 NFSV2PROC_SETATTR, 161 NFSV2PROC_LOOKUP, 162 NFSV2PROC_NOOP, 163 NFSV2PROC_READLINK, 164 NFSV2PROC_READ, 165 NFSV2PROC_WRITE, 166 NFSV2PROC_CREATE, 167 NFSV2PROC_MKDIR, 168 NFSV2PROC_SYMLINK, 169 NFSV2PROC_CREATE, 170 NFSV2PROC_REMOVE, 171 NFSV2PROC_RMDIR, 172 NFSV2PROC_RENAME, 173 NFSV2PROC_LINK, 174 NFSV2PROC_READDIR, 175 NFSV2PROC_NOOP, 176 NFSV2PROC_STATFS, 177 NFSV2PROC_NOOP, 178 NFSV2PROC_NOOP, 179 NFSV2PROC_NOOP, 180 NFSV2PROC_NOOP, 181 NFSV2PROC_NOOP, 182 NFSV2PROC_NOOP, 183 NFSV2PROC_NOOP, 184 }; 185 186 #ifndef NFS_NOSERVER 187 /* 188 * Maps errno values to nfs error numbers. 189 * Use NFSERR_IO as the catch all for ones not specifically defined in 190 * RFC 1094. 191 */ 192 static u_char nfsrv_v2errmap[ELAST] = { 193 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 194 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 195 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 196 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 197 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 198 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 199 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 200 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 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_NAMETOL, NFSERR_IO, NFSERR_IO, 206 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 207 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 208 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 209 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 210 NFSERR_IO /* << Last is 86 */ 211 }; 212 213 /* 214 * Maps errno values to nfs error numbers. 215 * Although it is not obvious whether or not NFS clients really care if 216 * a returned error value is in the specified list for the procedure, the 217 * safest thing to do is filter them appropriately. For Version 2, the 218 * X/Open XNFS document is the only specification that defines error values 219 * for each RPC (The RFC simply lists all possible error values for all RPCs), 220 * so I have decided to not do this for Version 2. 221 * The first entry is the default error return and the rest are the valid 222 * errors for that RPC in increasing numeric order. 223 */ 224 static short nfsv3err_null[] = { 225 0, 226 0, 227 }; 228 229 static short nfsv3err_getattr[] = { 230 NFSERR_IO, 231 NFSERR_IO, 232 NFSERR_STALE, 233 NFSERR_BADHANDLE, 234 NFSERR_SERVERFAULT, 235 0, 236 }; 237 238 static short nfsv3err_setattr[] = { 239 NFSERR_IO, 240 NFSERR_PERM, 241 NFSERR_IO, 242 NFSERR_ACCES, 243 NFSERR_INVAL, 244 NFSERR_NOSPC, 245 NFSERR_ROFS, 246 NFSERR_DQUOT, 247 NFSERR_STALE, 248 NFSERR_BADHANDLE, 249 NFSERR_NOT_SYNC, 250 NFSERR_SERVERFAULT, 251 0, 252 }; 253 254 static short nfsv3err_lookup[] = { 255 NFSERR_IO, 256 NFSERR_NOENT, 257 NFSERR_IO, 258 NFSERR_ACCES, 259 NFSERR_NOTDIR, 260 NFSERR_NAMETOL, 261 NFSERR_STALE, 262 NFSERR_BADHANDLE, 263 NFSERR_SERVERFAULT, 264 0, 265 }; 266 267 static short nfsv3err_access[] = { 268 NFSERR_IO, 269 NFSERR_IO, 270 NFSERR_STALE, 271 NFSERR_BADHANDLE, 272 NFSERR_SERVERFAULT, 273 0, 274 }; 275 276 static short nfsv3err_readlink[] = { 277 NFSERR_IO, 278 NFSERR_IO, 279 NFSERR_ACCES, 280 NFSERR_INVAL, 281 NFSERR_STALE, 282 NFSERR_BADHANDLE, 283 NFSERR_NOTSUPP, 284 NFSERR_SERVERFAULT, 285 0, 286 }; 287 288 static short nfsv3err_read[] = { 289 NFSERR_IO, 290 NFSERR_IO, 291 NFSERR_NXIO, 292 NFSERR_ACCES, 293 NFSERR_INVAL, 294 NFSERR_STALE, 295 NFSERR_BADHANDLE, 296 NFSERR_SERVERFAULT, 297 0, 298 }; 299 300 static short nfsv3err_write[] = { 301 NFSERR_IO, 302 NFSERR_IO, 303 NFSERR_ACCES, 304 NFSERR_INVAL, 305 NFSERR_FBIG, 306 NFSERR_NOSPC, 307 NFSERR_ROFS, 308 NFSERR_DQUOT, 309 NFSERR_STALE, 310 NFSERR_BADHANDLE, 311 NFSERR_SERVERFAULT, 312 0, 313 }; 314 315 static short nfsv3err_create[] = { 316 NFSERR_IO, 317 NFSERR_IO, 318 NFSERR_ACCES, 319 NFSERR_EXIST, 320 NFSERR_NOTDIR, 321 NFSERR_NOSPC, 322 NFSERR_ROFS, 323 NFSERR_NAMETOL, 324 NFSERR_DQUOT, 325 NFSERR_STALE, 326 NFSERR_BADHANDLE, 327 NFSERR_NOTSUPP, 328 NFSERR_SERVERFAULT, 329 0, 330 }; 331 332 static short nfsv3err_mkdir[] = { 333 NFSERR_IO, 334 NFSERR_IO, 335 NFSERR_ACCES, 336 NFSERR_EXIST, 337 NFSERR_NOTDIR, 338 NFSERR_NOSPC, 339 NFSERR_ROFS, 340 NFSERR_NAMETOL, 341 NFSERR_DQUOT, 342 NFSERR_STALE, 343 NFSERR_BADHANDLE, 344 NFSERR_NOTSUPP, 345 NFSERR_SERVERFAULT, 346 0, 347 }; 348 349 static short nfsv3err_symlink[] = { 350 NFSERR_IO, 351 NFSERR_IO, 352 NFSERR_ACCES, 353 NFSERR_EXIST, 354 NFSERR_NOTDIR, 355 NFSERR_NOSPC, 356 NFSERR_ROFS, 357 NFSERR_NAMETOL, 358 NFSERR_DQUOT, 359 NFSERR_STALE, 360 NFSERR_BADHANDLE, 361 NFSERR_NOTSUPP, 362 NFSERR_SERVERFAULT, 363 0, 364 }; 365 366 static short nfsv3err_mknod[] = { 367 NFSERR_IO, 368 NFSERR_IO, 369 NFSERR_ACCES, 370 NFSERR_EXIST, 371 NFSERR_NOTDIR, 372 NFSERR_NOSPC, 373 NFSERR_ROFS, 374 NFSERR_NAMETOL, 375 NFSERR_DQUOT, 376 NFSERR_STALE, 377 NFSERR_BADHANDLE, 378 NFSERR_NOTSUPP, 379 NFSERR_SERVERFAULT, 380 NFSERR_BADTYPE, 381 0, 382 }; 383 384 static short nfsv3err_remove[] = { 385 NFSERR_IO, 386 NFSERR_NOENT, 387 NFSERR_IO, 388 NFSERR_ACCES, 389 NFSERR_NOTDIR, 390 NFSERR_ROFS, 391 NFSERR_NAMETOL, 392 NFSERR_STALE, 393 NFSERR_BADHANDLE, 394 NFSERR_SERVERFAULT, 395 0, 396 }; 397 398 static short nfsv3err_rmdir[] = { 399 NFSERR_IO, 400 NFSERR_NOENT, 401 NFSERR_IO, 402 NFSERR_ACCES, 403 NFSERR_EXIST, 404 NFSERR_NOTDIR, 405 NFSERR_INVAL, 406 NFSERR_ROFS, 407 NFSERR_NAMETOL, 408 NFSERR_NOTEMPTY, 409 NFSERR_STALE, 410 NFSERR_BADHANDLE, 411 NFSERR_NOTSUPP, 412 NFSERR_SERVERFAULT, 413 0, 414 }; 415 416 static short nfsv3err_rename[] = { 417 NFSERR_IO, 418 NFSERR_NOENT, 419 NFSERR_IO, 420 NFSERR_ACCES, 421 NFSERR_EXIST, 422 NFSERR_XDEV, 423 NFSERR_NOTDIR, 424 NFSERR_ISDIR, 425 NFSERR_INVAL, 426 NFSERR_NOSPC, 427 NFSERR_ROFS, 428 NFSERR_MLINK, 429 NFSERR_NAMETOL, 430 NFSERR_NOTEMPTY, 431 NFSERR_DQUOT, 432 NFSERR_STALE, 433 NFSERR_BADHANDLE, 434 NFSERR_NOTSUPP, 435 NFSERR_SERVERFAULT, 436 0, 437 }; 438 439 static short nfsv3err_link[] = { 440 NFSERR_IO, 441 NFSERR_IO, 442 NFSERR_ACCES, 443 NFSERR_EXIST, 444 NFSERR_XDEV, 445 NFSERR_NOTDIR, 446 NFSERR_INVAL, 447 NFSERR_NOSPC, 448 NFSERR_ROFS, 449 NFSERR_MLINK, 450 NFSERR_NAMETOL, 451 NFSERR_DQUOT, 452 NFSERR_STALE, 453 NFSERR_BADHANDLE, 454 NFSERR_NOTSUPP, 455 NFSERR_SERVERFAULT, 456 0, 457 }; 458 459 static short nfsv3err_readdir[] = { 460 NFSERR_IO, 461 NFSERR_IO, 462 NFSERR_ACCES, 463 NFSERR_NOTDIR, 464 NFSERR_STALE, 465 NFSERR_BADHANDLE, 466 NFSERR_BAD_COOKIE, 467 NFSERR_TOOSMALL, 468 NFSERR_SERVERFAULT, 469 0, 470 }; 471 472 static short nfsv3err_readdirplus[] = { 473 NFSERR_IO, 474 NFSERR_IO, 475 NFSERR_ACCES, 476 NFSERR_NOTDIR, 477 NFSERR_STALE, 478 NFSERR_BADHANDLE, 479 NFSERR_BAD_COOKIE, 480 NFSERR_NOTSUPP, 481 NFSERR_TOOSMALL, 482 NFSERR_SERVERFAULT, 483 0, 484 }; 485 486 static short nfsv3err_fsstat[] = { 487 NFSERR_IO, 488 NFSERR_IO, 489 NFSERR_STALE, 490 NFSERR_BADHANDLE, 491 NFSERR_SERVERFAULT, 492 0, 493 }; 494 495 static short nfsv3err_fsinfo[] = { 496 NFSERR_STALE, 497 NFSERR_STALE, 498 NFSERR_BADHANDLE, 499 NFSERR_SERVERFAULT, 500 0, 501 }; 502 503 static short nfsv3err_pathconf[] = { 504 NFSERR_STALE, 505 NFSERR_STALE, 506 NFSERR_BADHANDLE, 507 NFSERR_SERVERFAULT, 508 0, 509 }; 510 511 static short nfsv3err_commit[] = { 512 NFSERR_IO, 513 NFSERR_IO, 514 NFSERR_STALE, 515 NFSERR_BADHANDLE, 516 NFSERR_SERVERFAULT, 517 0, 518 }; 519 520 static short *nfsrv_v3errmap[] = { 521 nfsv3err_null, 522 nfsv3err_getattr, 523 nfsv3err_setattr, 524 nfsv3err_lookup, 525 nfsv3err_access, 526 nfsv3err_readlink, 527 nfsv3err_read, 528 nfsv3err_write, 529 nfsv3err_create, 530 nfsv3err_mkdir, 531 nfsv3err_symlink, 532 nfsv3err_mknod, 533 nfsv3err_remove, 534 nfsv3err_rmdir, 535 nfsv3err_rename, 536 nfsv3err_link, 537 nfsv3err_readdir, 538 nfsv3err_readdirplus, 539 nfsv3err_fsstat, 540 nfsv3err_fsinfo, 541 nfsv3err_pathconf, 542 nfsv3err_commit, 543 }; 544 545 #endif /* NFS_NOSERVER */ 546 547 extern struct nfsrtt nfsrtt; 548 extern time_t nqnfsstarttime; 549 extern int nqsrv_clockskew; 550 extern int nqsrv_writeslack; 551 extern int nqsrv_maxlease; 552 extern struct nfsstats nfsstats; 553 extern int nqnfs_piggy[NFS_NPROCS]; 554 extern nfstype nfsv2_type[9]; 555 extern nfstype nfsv3_type[9]; 556 extern struct nfsnodehashhead *nfsnodehashtbl; 557 extern u_long nfsnodehash; 558 559 struct nfssvc_args; 560 extern int nfssvc(struct proc *, struct nfssvc_args *, int *); 561 562 LIST_HEAD(nfsnodehashhead, nfsnode); 563 564 int nfs_webnamei (struct nameidata *, struct vnode *, struct proc *); 565 566 u_quad_t 567 nfs_curusec(void) 568 { 569 struct timeval tv; 570 571 getmicrotime(&tv); 572 return ((u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec); 573 } 574 575 /* 576 * Create the header for an rpc request packet 577 * The hsiz is the size of the rest of the nfs request header. 578 * (just used to decide if a cluster is a good idea) 579 */ 580 struct mbuf * 581 nfsm_reqh(struct vnode *vp, u_long procid, int hsiz, caddr_t *bposp) 582 { 583 struct mbuf *mb; 584 u_int32_t *tl; 585 caddr_t bpos; 586 struct mbuf *mb2; 587 struct nfsmount *nmp; 588 int nqflag; 589 590 MGET(mb, MB_WAIT, MT_DATA); 591 if (hsiz >= MINCLSIZE) 592 MCLGET(mb, MB_WAIT); 593 mb->m_len = 0; 594 bpos = mtod(mb, caddr_t); 595 596 /* 597 * For NQNFS, add lease request. 598 */ 599 if (vp) { 600 nmp = VFSTONFS(vp->v_mount); 601 if (nmp->nm_flag & NFSMNT_NQNFS) { 602 nqflag = NQNFS_NEEDLEASE(vp, procid); 603 if (nqflag) { 604 nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED); 605 *tl++ = txdr_unsigned(nqflag); 606 *tl = txdr_unsigned(nmp->nm_leaseterm); 607 } else { 608 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 609 *tl = 0; 610 } 611 } 612 } 613 /* Finally, return values */ 614 *bposp = bpos; 615 return (mb); 616 } 617 618 /* 619 * Build the RPC header and fill in the authorization info. 620 * The authorization string argument is only used when the credentials 621 * come from outside of the kernel. 622 * Returns the head of the mbuf list. 623 */ 624 struct mbuf * 625 nfsm_rpchead(struct ucred *cr, int nmflag, int procid, int auth_type, 626 int auth_len, char *auth_str, int verf_len, char *verf_str, 627 struct mbuf *mrest, int mrest_len, struct mbuf **mbp, 628 u_int32_t *xidp) 629 { 630 struct mbuf *mb; 631 u_int32_t *tl; 632 caddr_t bpos; 633 int i; 634 struct mbuf *mreq, *mb2; 635 int siz, grpsiz, authsiz; 636 637 authsiz = nfsm_rndup(auth_len); 638 MGETHDR(mb, MB_WAIT, MT_DATA); 639 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 640 MCLGET(mb, MB_WAIT); 641 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 642 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 643 } else { 644 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 645 } 646 mb->m_len = 0; 647 mreq = mb; 648 bpos = mtod(mb, caddr_t); 649 650 /* 651 * First the RPC header. 652 */ 653 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 654 655 /* Get a pretty random xid to start with */ 656 if (!nfs_xid) 657 nfs_xid = random(); 658 /* 659 * Skip zero xid if it should ever happen. 660 */ 661 if (++nfs_xid == 0) 662 nfs_xid++; 663 664 *tl++ = *xidp = txdr_unsigned(nfs_xid); 665 *tl++ = rpc_call; 666 *tl++ = rpc_vers; 667 if (nmflag & NFSMNT_NQNFS) { 668 *tl++ = txdr_unsigned(NQNFS_PROG); 669 *tl++ = txdr_unsigned(NQNFS_VER3); 670 } else { 671 *tl++ = txdr_unsigned(NFS_PROG); 672 if (nmflag & NFSMNT_NFSV3) 673 *tl++ = txdr_unsigned(NFS_VER3); 674 else 675 *tl++ = txdr_unsigned(NFS_VER2); 676 } 677 if (nmflag & NFSMNT_NFSV3) 678 *tl++ = txdr_unsigned(procid); 679 else 680 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 681 682 /* 683 * And then the authorization cred. 684 */ 685 *tl++ = txdr_unsigned(auth_type); 686 *tl = txdr_unsigned(authsiz); 687 switch (auth_type) { 688 case RPCAUTH_UNIX: 689 nfsm_build(tl, u_int32_t *, auth_len); 690 *tl++ = 0; /* stamp ?? */ 691 *tl++ = 0; /* NULL hostname */ 692 *tl++ = txdr_unsigned(cr->cr_uid); 693 *tl++ = txdr_unsigned(cr->cr_groups[0]); 694 grpsiz = (auth_len >> 2) - 5; 695 *tl++ = txdr_unsigned(grpsiz); 696 for (i = 1; i <= grpsiz; i++) 697 *tl++ = txdr_unsigned(cr->cr_groups[i]); 698 break; 699 case RPCAUTH_KERB4: 700 siz = auth_len; 701 while (siz > 0) { 702 if (M_TRAILINGSPACE(mb) == 0) { 703 MGET(mb2, MB_WAIT, MT_DATA); 704 if (siz >= MINCLSIZE) 705 MCLGET(mb2, MB_WAIT); 706 mb->m_next = mb2; 707 mb = mb2; 708 mb->m_len = 0; 709 bpos = mtod(mb, caddr_t); 710 } 711 i = min(siz, M_TRAILINGSPACE(mb)); 712 bcopy(auth_str, bpos, i); 713 mb->m_len += i; 714 auth_str += i; 715 bpos += i; 716 siz -= i; 717 } 718 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 719 for (i = 0; i < siz; i++) 720 *bpos++ = '\0'; 721 mb->m_len += siz; 722 } 723 break; 724 }; 725 726 /* 727 * And the verifier... 728 */ 729 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 730 if (verf_str) { 731 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 732 *tl = txdr_unsigned(verf_len); 733 siz = verf_len; 734 while (siz > 0) { 735 if (M_TRAILINGSPACE(mb) == 0) { 736 MGET(mb2, MB_WAIT, MT_DATA); 737 if (siz >= MINCLSIZE) 738 MCLGET(mb2, MB_WAIT); 739 mb->m_next = mb2; 740 mb = mb2; 741 mb->m_len = 0; 742 bpos = mtod(mb, caddr_t); 743 } 744 i = min(siz, M_TRAILINGSPACE(mb)); 745 bcopy(verf_str, bpos, i); 746 mb->m_len += i; 747 verf_str += i; 748 bpos += i; 749 siz -= i; 750 } 751 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 752 for (i = 0; i < siz; i++) 753 *bpos++ = '\0'; 754 mb->m_len += siz; 755 } 756 } else { 757 *tl++ = txdr_unsigned(RPCAUTH_NULL); 758 *tl = 0; 759 } 760 mb->m_next = mrest; 761 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 762 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 763 *mbp = mb; 764 return (mreq); 765 } 766 767 /* 768 * copies mbuf chain to the uio scatter/gather list 769 */ 770 int 771 nfsm_mbuftouio(struct mbuf **mrep, struct uio *uiop, int siz, caddr_t *dpos) 772 { 773 char *mbufcp, *uiocp; 774 int xfer, left, len; 775 struct mbuf *mp; 776 long uiosiz, rem; 777 int error = 0; 778 779 mp = *mrep; 780 mbufcp = *dpos; 781 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 782 rem = nfsm_rndup(siz)-siz; 783 while (siz > 0) { 784 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 785 return (EFBIG); 786 left = uiop->uio_iov->iov_len; 787 uiocp = uiop->uio_iov->iov_base; 788 if (left > siz) 789 left = siz; 790 uiosiz = left; 791 while (left > 0) { 792 while (len == 0) { 793 mp = mp->m_next; 794 if (mp == NULL) 795 return (EBADRPC); 796 mbufcp = mtod(mp, caddr_t); 797 len = mp->m_len; 798 } 799 xfer = (left > len) ? len : left; 800 #ifdef notdef 801 /* Not Yet.. */ 802 if (uiop->uio_iov->iov_op != NULL) 803 (*(uiop->uio_iov->iov_op)) 804 (mbufcp, uiocp, xfer); 805 else 806 #endif 807 if (uiop->uio_segflg == UIO_SYSSPACE) 808 bcopy(mbufcp, uiocp, xfer); 809 else 810 copyout(mbufcp, uiocp, xfer); 811 left -= xfer; 812 len -= xfer; 813 mbufcp += xfer; 814 uiocp += xfer; 815 uiop->uio_offset += xfer; 816 uiop->uio_resid -= xfer; 817 } 818 if (uiop->uio_iov->iov_len <= siz) { 819 uiop->uio_iovcnt--; 820 uiop->uio_iov++; 821 } else { 822 uiop->uio_iov->iov_base += uiosiz; 823 uiop->uio_iov->iov_len -= uiosiz; 824 } 825 siz -= uiosiz; 826 } 827 *dpos = mbufcp; 828 *mrep = mp; 829 if (rem > 0) { 830 if (len < rem) 831 error = nfs_adv(mrep, dpos, rem, len); 832 else 833 *dpos += rem; 834 } 835 return (error); 836 } 837 838 /* 839 * copies a uio scatter/gather list to an mbuf chain. 840 * NOTE: can ony handle iovcnt == 1 841 */ 842 int 843 nfsm_uiotombuf(struct uio *uiop, struct mbuf **mq, int siz, caddr_t *bpos) 844 { 845 char *uiocp; 846 struct mbuf *mp, *mp2; 847 int xfer, left, mlen; 848 int uiosiz, clflg, rem; 849 char *cp; 850 851 #ifdef DIAGNOSTIC 852 if (uiop->uio_iovcnt != 1) 853 panic("nfsm_uiotombuf: iovcnt != 1"); 854 #endif 855 856 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 857 clflg = 1; 858 else 859 clflg = 0; 860 rem = nfsm_rndup(siz)-siz; 861 mp = mp2 = *mq; 862 while (siz > 0) { 863 left = uiop->uio_iov->iov_len; 864 uiocp = uiop->uio_iov->iov_base; 865 if (left > siz) 866 left = siz; 867 uiosiz = left; 868 while (left > 0) { 869 mlen = M_TRAILINGSPACE(mp); 870 if (mlen == 0) { 871 MGET(mp, MB_WAIT, MT_DATA); 872 if (clflg) 873 MCLGET(mp, MB_WAIT); 874 mp->m_len = 0; 875 mp2->m_next = mp; 876 mp2 = mp; 877 mlen = M_TRAILINGSPACE(mp); 878 } 879 xfer = (left > mlen) ? mlen : left; 880 #ifdef notdef 881 /* Not Yet.. */ 882 if (uiop->uio_iov->iov_op != NULL) 883 (*(uiop->uio_iov->iov_op)) 884 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 885 else 886 #endif 887 if (uiop->uio_segflg == UIO_SYSSPACE) 888 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 889 else 890 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 891 mp->m_len += xfer; 892 left -= xfer; 893 uiocp += xfer; 894 uiop->uio_offset += xfer; 895 uiop->uio_resid -= xfer; 896 } 897 uiop->uio_iov->iov_base += uiosiz; 898 uiop->uio_iov->iov_len -= uiosiz; 899 siz -= uiosiz; 900 } 901 if (rem > 0) { 902 if (rem > M_TRAILINGSPACE(mp)) { 903 MGET(mp, MB_WAIT, MT_DATA); 904 mp->m_len = 0; 905 mp2->m_next = mp; 906 } 907 cp = mtod(mp, caddr_t)+mp->m_len; 908 for (left = 0; left < rem; left++) 909 *cp++ = '\0'; 910 mp->m_len += rem; 911 *bpos = cp; 912 } else 913 *bpos = mtod(mp, caddr_t)+mp->m_len; 914 *mq = mp; 915 return (0); 916 } 917 918 /* 919 * Help break down an mbuf chain by setting the first siz bytes contiguous 920 * pointed to by returned val. 921 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 922 * cases. (The macros use the vars. dpos and dpos2) 923 */ 924 int 925 nfsm_disct(struct mbuf **mdp, caddr_t *dposp, int siz, int left, caddr_t *cp2) 926 { 927 struct mbuf *mp, *mp2; 928 int siz2, xfer; 929 caddr_t p; 930 931 mp = *mdp; 932 while (left == 0) { 933 *mdp = mp = mp->m_next; 934 if (mp == NULL) 935 return (EBADRPC); 936 left = mp->m_len; 937 *dposp = mtod(mp, caddr_t); 938 } 939 if (left >= siz) { 940 *cp2 = *dposp; 941 *dposp += siz; 942 } else if (mp->m_next == NULL) { 943 return (EBADRPC); 944 } else if (siz > MHLEN) { 945 panic("nfs S too big"); 946 } else { 947 MGET(mp2, MB_WAIT, MT_DATA); 948 mp2->m_next = mp->m_next; 949 mp->m_next = mp2; 950 mp->m_len -= left; 951 mp = mp2; 952 *cp2 = p = mtod(mp, caddr_t); 953 bcopy(*dposp, p, left); /* Copy what was left */ 954 siz2 = siz-left; 955 p += left; 956 mp2 = mp->m_next; 957 /* Loop around copying up the siz2 bytes */ 958 while (siz2 > 0) { 959 if (mp2 == NULL) 960 return (EBADRPC); 961 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 962 if (xfer > 0) { 963 bcopy(mtod(mp2, caddr_t), p, xfer); 964 NFSMADV(mp2, xfer); 965 mp2->m_len -= xfer; 966 p += xfer; 967 siz2 -= xfer; 968 } 969 if (siz2 > 0) 970 mp2 = mp2->m_next; 971 } 972 mp->m_len = siz; 973 *mdp = mp2; 974 *dposp = mtod(mp2, caddr_t); 975 } 976 return (0); 977 } 978 979 /* 980 * Advance the position in the mbuf chain. 981 */ 982 int 983 nfs_adv(struct mbuf **mdp, caddr_t *dposp, int offs, int left) 984 { 985 struct mbuf *m; 986 int s; 987 988 m = *mdp; 989 s = left; 990 while (s < offs) { 991 offs -= s; 992 m = m->m_next; 993 if (m == NULL) 994 return (EBADRPC); 995 s = m->m_len; 996 } 997 *mdp = m; 998 *dposp = mtod(m, caddr_t)+offs; 999 return (0); 1000 } 1001 1002 /* 1003 * Copy a string into mbufs for the hard cases... 1004 */ 1005 int 1006 nfsm_strtmbuf(struct mbuf **mb, char **bpos, const char *cp, long siz) 1007 { 1008 struct mbuf *m1 = NULL, *m2; 1009 long left, xfer, len, tlen; 1010 u_int32_t *tl; 1011 int putsize; 1012 1013 putsize = 1; 1014 m2 = *mb; 1015 left = M_TRAILINGSPACE(m2); 1016 if (left > 0) { 1017 tl = ((u_int32_t *)(*bpos)); 1018 *tl++ = txdr_unsigned(siz); 1019 putsize = 0; 1020 left -= NFSX_UNSIGNED; 1021 m2->m_len += NFSX_UNSIGNED; 1022 if (left > 0) { 1023 bcopy(cp, (caddr_t) tl, left); 1024 siz -= left; 1025 cp += left; 1026 m2->m_len += left; 1027 left = 0; 1028 } 1029 } 1030 /* Loop around adding mbufs */ 1031 while (siz > 0) { 1032 MGET(m1, MB_WAIT, MT_DATA); 1033 if (siz > MLEN) 1034 MCLGET(m1, MB_WAIT); 1035 m1->m_len = NFSMSIZ(m1); 1036 m2->m_next = m1; 1037 m2 = m1; 1038 tl = mtod(m1, u_int32_t *); 1039 tlen = 0; 1040 if (putsize) { 1041 *tl++ = txdr_unsigned(siz); 1042 m1->m_len -= NFSX_UNSIGNED; 1043 tlen = NFSX_UNSIGNED; 1044 putsize = 0; 1045 } 1046 if (siz < m1->m_len) { 1047 len = nfsm_rndup(siz); 1048 xfer = siz; 1049 if (xfer < len) 1050 *(tl+(xfer>>2)) = 0; 1051 } else { 1052 xfer = len = m1->m_len; 1053 } 1054 bcopy(cp, (caddr_t) tl, xfer); 1055 m1->m_len = len+tlen; 1056 siz -= xfer; 1057 cp += xfer; 1058 } 1059 *mb = m1; 1060 *bpos = mtod(m1, caddr_t)+m1->m_len; 1061 return (0); 1062 } 1063 1064 /* 1065 * Called once to initialize data structures... 1066 */ 1067 int 1068 nfs_init(struct vfsconf *vfsp) 1069 { 1070 int i; 1071 1072 nfsmount_zone = zinit("NFSMOUNT", sizeof(struct nfsmount), 0, 0, 1); 1073 1074 nfs_mount_type = vfsp->vfc_typenum; 1075 nfsrtt.pos = 0; 1076 rpc_vers = txdr_unsigned(RPC_VER2); 1077 rpc_call = txdr_unsigned(RPC_CALL); 1078 rpc_reply = txdr_unsigned(RPC_REPLY); 1079 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1080 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1081 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1082 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1083 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1084 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1085 nfs_prog = txdr_unsigned(NFS_PROG); 1086 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1087 nfs_true = txdr_unsigned(TRUE); 1088 nfs_false = txdr_unsigned(FALSE); 1089 nfs_xdrneg1 = txdr_unsigned(-1); 1090 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1091 if (nfs_ticks < 1) 1092 nfs_ticks = 1; 1093 /* Ensure async daemons disabled */ 1094 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1095 nfs_iodwant[i] = NULL; 1096 nfs_iodmount[i] = (struct nfsmount *)0; 1097 } 1098 nfs_nhinit(); /* Init the nfsnode table */ 1099 #ifndef NFS_NOSERVER 1100 nfsrv_init(0); /* Init server data structures */ 1101 nfsrv_initcache(); /* Init the server request cache */ 1102 #endif 1103 1104 /* 1105 * Initialize the nqnfs server stuff. 1106 */ 1107 if (nqnfsstarttime == 0) { 1108 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1109 + nqsrv_clockskew + nqsrv_writeslack; 1110 NQLOADNOVRAM(nqnfsstarttime); 1111 CIRCLEQ_INIT(&nqtimerhead); 1112 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); 1113 } 1114 1115 /* 1116 * Initialize reply list and start timer 1117 */ 1118 TAILQ_INIT(&nfs_reqq); 1119 1120 nfs_timer(0); 1121 1122 /* 1123 * Set up lease_check and lease_updatetime so that other parts 1124 * of the system can call us, if we are loadable. 1125 */ 1126 #ifndef NFS_NOSERVER 1127 nfs_prev_vop_lease_check = default_vnode_vops->vop_lease; 1128 default_vnode_vops->vop_lease = nqnfs_vop_lease_check; 1129 #endif 1130 nfs_prev_lease_updatetime = lease_updatetime; 1131 lease_updatetime = nfs_lease_updatetime; 1132 nfs_prev_nfssvc_sy_narg = sysent[SYS_nfssvc].sy_narg; 1133 sysent[SYS_nfssvc].sy_narg = 2; 1134 nfs_prev_nfssvc_sy_call = sysent[SYS_nfssvc].sy_call; 1135 sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc; 1136 1137 nfs_pbuf_freecnt = nswbuf / 2 + 1; 1138 1139 return (0); 1140 } 1141 1142 int 1143 nfs_uninit(struct vfsconf *vfsp) 1144 { 1145 1146 untimeout(nfs_timer, (void *)NULL, nfs_timer_handle); 1147 nfs_mount_type = -1; 1148 #ifndef NFS_NOSERVER 1149 default_vnode_vops->vop_lease = nfs_prev_vop_lease_check; 1150 #endif 1151 lease_updatetime = nfs_prev_lease_updatetime; 1152 sysent[SYS_nfssvc].sy_narg = nfs_prev_nfssvc_sy_narg; 1153 sysent[SYS_nfssvc].sy_call = nfs_prev_nfssvc_sy_call; 1154 return (0); 1155 } 1156 1157 /* 1158 * Attribute cache routines. 1159 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1160 * that are on the mbuf list 1161 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1162 * error otherwise 1163 */ 1164 1165 /* 1166 * Load the attribute cache (that lives in the nfsnode entry) with 1167 * the values on the mbuf list and 1168 * Iff vap not NULL 1169 * copy the attributes to *vaper 1170 */ 1171 int 1172 nfs_loadattrcache(struct vnode **vpp, struct mbuf **mdp, caddr_t *dposp, 1173 struct vattr *vaper, int dontshrink) 1174 { 1175 struct vnode *vp = *vpp; 1176 struct vattr *vap; 1177 struct nfs_fattr *fp; 1178 struct nfsnode *np; 1179 int32_t t1; 1180 caddr_t cp2; 1181 int error = 0; 1182 udev_t rdev; 1183 struct mbuf *md; 1184 enum vtype vtyp; 1185 u_short vmode; 1186 struct timespec mtime; 1187 int v3 = NFS_ISV3(vp); 1188 1189 md = *mdp; 1190 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1191 if ((error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) != 0) 1192 return (error); 1193 fp = (struct nfs_fattr *)cp2; 1194 if (v3) { 1195 vtyp = nfsv3tov_type(fp->fa_type); 1196 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1197 rdev = makeudev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), 1198 fxdr_unsigned(int, fp->fa3_rdev.specdata2)); 1199 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1200 } else { 1201 vtyp = nfsv2tov_type(fp->fa_type); 1202 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1203 /* 1204 * XXX 1205 * 1206 * The duplicate information returned in fa_type and fa_mode 1207 * is an ambiguity in the NFS version 2 protocol. 1208 * 1209 * VREG should be taken literally as a regular file. If a 1210 * server intents to return some type information differently 1211 * in the upper bits of the mode field (e.g. for sockets, or 1212 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1213 * leave the examination of the mode bits even in the VREG 1214 * case to avoid breakage for bogus servers, but we make sure 1215 * that there are actually type bits set in the upper part of 1216 * fa_mode (and failing that, trust the va_type field). 1217 * 1218 * NFSv3 cleared the issue, and requires fa_mode to not 1219 * contain any type information (while also introduing sockets 1220 * and FIFOs for fa_type). 1221 */ 1222 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1223 vtyp = IFTOVT(vmode); 1224 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1225 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1226 1227 /* 1228 * Really ugly NFSv2 kludge. 1229 */ 1230 if (vtyp == VCHR && rdev == (udev_t)0xffffffff) 1231 vtyp = VFIFO; 1232 } 1233 1234 /* 1235 * If v_type == VNON it is a new node, so fill in the v_type, 1236 * n_mtime fields. Check to see if it represents a special 1237 * device, and if so, check for a possible alias. Once the 1238 * correct vnode has been obtained, fill in the rest of the 1239 * information. 1240 */ 1241 np = VTONFS(vp); 1242 if (vp->v_type != vtyp) { 1243 vp->v_type = vtyp; 1244 if (vp->v_type == VFIFO) { 1245 vp->v_ops = vp->v_mount->mnt_vn_fifo_ops; 1246 } else if (vp->v_type == VCHR || vp->v_type == VBLK) { 1247 vp->v_ops = vp->v_mount->mnt_vn_spec_ops; 1248 addaliasu(vp, rdev); 1249 } else { 1250 vp->v_ops = vp->v_mount->mnt_vn_ops; 1251 } 1252 np->n_mtime = mtime.tv_sec; 1253 } 1254 vap = &np->n_vattr; 1255 vap->va_type = vtyp; 1256 vap->va_mode = (vmode & 07777); 1257 vap->va_rdev = rdev; 1258 vap->va_mtime = mtime; 1259 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1260 if (v3) { 1261 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1262 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1263 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1264 vap->va_size = fxdr_hyper(&fp->fa3_size); 1265 vap->va_blocksize = NFS_FABLKSIZE; 1266 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 1267 vap->va_fileid = fxdr_unsigned(int32_t, 1268 fp->fa3_fileid.nfsuquad[1]); 1269 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1270 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1271 vap->va_flags = 0; 1272 vap->va_filerev = 0; 1273 } else { 1274 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1275 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1276 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1277 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1278 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); 1279 vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) 1280 * NFS_FABLKSIZE; 1281 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1282 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1283 vap->va_flags = 0; 1284 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1285 fp->fa2_ctime.nfsv2_sec); 1286 vap->va_ctime.tv_nsec = 0; 1287 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1288 vap->va_filerev = 0; 1289 } 1290 np->n_attrstamp = time_second; 1291 if (vap->va_size != np->n_size) { 1292 if (vap->va_type == VREG) { 1293 if (dontshrink && vap->va_size < np->n_size) { 1294 /* 1295 * We've been told not to shrink the file; 1296 * zero np->n_attrstamp to indicate that 1297 * the attributes are stale. 1298 */ 1299 vap->va_size = np->n_size; 1300 np->n_attrstamp = 0; 1301 } else if (np->n_flag & NMODIFIED) { 1302 /* 1303 * We've modified the file: Use the larger 1304 * of our size, and the server's size. 1305 */ 1306 if (vap->va_size < np->n_size) { 1307 vap->va_size = np->n_size; 1308 } else { 1309 np->n_size = vap->va_size; 1310 np->n_flag |= NSIZECHANGED; 1311 } 1312 } else { 1313 np->n_size = vap->va_size; 1314 np->n_flag |= NSIZECHANGED; 1315 } 1316 vnode_pager_setsize(vp, np->n_size); 1317 } else { 1318 np->n_size = vap->va_size; 1319 } 1320 } 1321 if (vaper != NULL) { 1322 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1323 if (np->n_flag & NCHG) { 1324 if (np->n_flag & NACC) 1325 vaper->va_atime = np->n_atim; 1326 if (np->n_flag & NUPD) 1327 vaper->va_mtime = np->n_mtim; 1328 } 1329 } 1330 return (0); 1331 } 1332 1333 #ifdef NFS_ACDEBUG 1334 #include <sys/sysctl.h> 1335 SYSCTL_DECL(_vfs_nfs); 1336 static int nfs_acdebug; 1337 SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, ""); 1338 #endif 1339 1340 /* 1341 * Check the time stamp 1342 * If the cache is valid, copy contents to *vap and return 0 1343 * otherwise return an error 1344 */ 1345 int 1346 nfs_getattrcache(struct vnode *vp, struct vattr *vaper) 1347 { 1348 struct nfsnode *np; 1349 struct vattr *vap; 1350 struct nfsmount *nmp; 1351 int timeo; 1352 1353 np = VTONFS(vp); 1354 vap = &np->n_vattr; 1355 nmp = VFSTONFS(vp->v_mount); 1356 /* XXX n_mtime doesn't seem to be updated on a miss-and-reload */ 1357 timeo = (time_second - np->n_mtime) / 10; 1358 1359 #ifdef NFS_ACDEBUG 1360 if (nfs_acdebug>1) 1361 printf("nfs_getattrcache: initial timeo = %d\n", timeo); 1362 #endif 1363 1364 if (vap->va_type == VDIR) { 1365 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin) 1366 timeo = nmp->nm_acdirmin; 1367 else if (timeo > nmp->nm_acdirmax) 1368 timeo = nmp->nm_acdirmax; 1369 } else { 1370 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin) 1371 timeo = nmp->nm_acregmin; 1372 else if (timeo > nmp->nm_acregmax) 1373 timeo = nmp->nm_acregmax; 1374 } 1375 1376 #ifdef NFS_ACDEBUG 1377 if (nfs_acdebug > 2) 1378 printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n", 1379 nmp->nm_acregmin, nmp->nm_acregmax, 1380 nmp->nm_acdirmin, nmp->nm_acdirmax); 1381 1382 if (nfs_acdebug) 1383 printf("nfs_getattrcache: age = %d; final timeo = %d\n", 1384 (time_second - np->n_attrstamp), timeo); 1385 #endif 1386 1387 if ((time_second - np->n_attrstamp) >= timeo) { 1388 nfsstats.attrcache_misses++; 1389 return (ENOENT); 1390 } 1391 nfsstats.attrcache_hits++; 1392 if (vap->va_size != np->n_size) { 1393 if (vap->va_type == VREG) { 1394 if (np->n_flag & NMODIFIED) { 1395 if (vap->va_size < np->n_size) 1396 vap->va_size = np->n_size; 1397 else 1398 np->n_size = vap->va_size; 1399 } else { 1400 np->n_size = vap->va_size; 1401 } 1402 vnode_pager_setsize(vp, np->n_size); 1403 } else { 1404 np->n_size = vap->va_size; 1405 } 1406 } 1407 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1408 if (np->n_flag & NCHG) { 1409 if (np->n_flag & NACC) 1410 vaper->va_atime = np->n_atim; 1411 if (np->n_flag & NUPD) 1412 vaper->va_mtime = np->n_mtim; 1413 } 1414 return (0); 1415 } 1416 1417 #ifndef NFS_NOSERVER 1418 /* 1419 * Set up nameidata for a lookup() call and do it. 1420 * 1421 * If pubflag is set, this call is done for a lookup operation on the 1422 * public filehandle. In that case we allow crossing mountpoints and 1423 * absolute pathnames. However, the caller is expected to check that 1424 * the lookup result is within the public fs, and deny access if 1425 * it is not. 1426 * 1427 * nfs_namei() clears out garbage fields that namei() might leave garbage. 1428 * This is mainly ni_vp and ni_dvp when an error occurs, and ni_dvp when no 1429 * error occurs but the parent was not requested. 1430 * 1431 * dirp may be set whether an error is returned or not, and must be 1432 * released by the caller. 1433 */ 1434 int 1435 nfs_namei(struct nameidata *ndp, fhandle_t *fhp, int len, 1436 struct nfssvc_sock *slp, struct sockaddr *nam, struct mbuf **mdp, 1437 caddr_t *dposp, struct vnode **retdirp, struct thread *td, 1438 int kerbflag, int pubflag) 1439 { 1440 int i, rem; 1441 struct mbuf *md; 1442 char *fromcp, *tocp, *cp; 1443 struct iovec aiov; 1444 struct uio auio; 1445 struct vnode *dp; 1446 int error, rdonly, linklen; 1447 struct componentname *cnp = &ndp->ni_cnd; 1448 1449 *retdirp = (struct vnode *)0; 1450 cnp->cn_pnbuf = zalloc(namei_zone); 1451 1452 /* 1453 * Copy the name from the mbuf list to ndp->ni_pnbuf 1454 * and set the various ndp fields appropriately. 1455 */ 1456 fromcp = *dposp; 1457 tocp = cnp->cn_pnbuf; 1458 md = *mdp; 1459 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1460 for (i = 0; i < len; i++) { 1461 while (rem == 0) { 1462 md = md->m_next; 1463 if (md == NULL) { 1464 error = EBADRPC; 1465 goto out; 1466 } 1467 fromcp = mtod(md, caddr_t); 1468 rem = md->m_len; 1469 } 1470 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1471 error = EACCES; 1472 goto out; 1473 } 1474 *tocp++ = *fromcp++; 1475 rem--; 1476 } 1477 *tocp = '\0'; 1478 *mdp = md; 1479 *dposp = fromcp; 1480 len = nfsm_rndup(len)-len; 1481 if (len > 0) { 1482 if (rem >= len) 1483 *dposp += len; 1484 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1485 goto out; 1486 } 1487 1488 /* 1489 * Extract and set starting directory. 1490 */ 1491 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1492 nam, &rdonly, kerbflag, pubflag); 1493 if (error) 1494 goto out; 1495 if (dp->v_type != VDIR) { 1496 vrele(dp); 1497 error = ENOTDIR; 1498 goto out; 1499 } 1500 1501 if (rdonly) 1502 cnp->cn_flags |= CNP_RDONLY; 1503 1504 /* 1505 * Set return directory. Reference to dp is implicitly transfered 1506 * to the returned pointer 1507 */ 1508 *retdirp = dp; 1509 1510 if (pubflag) { 1511 /* 1512 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1513 * and the 'native path' indicator. 1514 */ 1515 cp = zalloc(namei_zone); 1516 fromcp = cnp->cn_pnbuf; 1517 tocp = cp; 1518 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1519 switch ((unsigned char)*fromcp) { 1520 case WEBNFS_NATIVE_CHAR: 1521 /* 1522 * 'Native' path for us is the same 1523 * as a path according to the NFS spec, 1524 * just skip the escape char. 1525 */ 1526 fromcp++; 1527 break; 1528 /* 1529 * More may be added in the future, range 0x80-0xff 1530 */ 1531 default: 1532 error = EIO; 1533 zfree(namei_zone, cp); 1534 goto out; 1535 } 1536 } 1537 /* 1538 * Translate the '%' escapes, URL-style. 1539 */ 1540 while (*fromcp != '\0') { 1541 if (*fromcp == WEBNFS_ESC_CHAR) { 1542 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1543 fromcp++; 1544 *tocp++ = HEXSTRTOI(fromcp); 1545 fromcp += 2; 1546 continue; 1547 } else { 1548 error = ENOENT; 1549 zfree(namei_zone, cp); 1550 goto out; 1551 } 1552 } else 1553 *tocp++ = *fromcp++; 1554 } 1555 *tocp = '\0'; 1556 zfree(namei_zone, cnp->cn_pnbuf); 1557 cnp->cn_pnbuf = cp; 1558 } 1559 1560 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1561 ndp->ni_segflg = UIO_SYSSPACE; 1562 1563 if (pubflag) { 1564 ndp->ni_rootdir = rootvnode; 1565 ndp->ni_loopcnt = 0; 1566 if (cnp->cn_pnbuf[0] == '/') 1567 dp = rootvnode; 1568 } else { 1569 cnp->cn_flags |= CNP_NOCROSSMOUNT; 1570 } 1571 1572 /* 1573 * Initialize for scan, set ni_startdir and bump ref on dp again 1574 * because lookup() will dereference ni_startdir. 1575 */ 1576 1577 cnp->cn_td = td; 1578 vref(dp); 1579 ndp->ni_startdir = dp; 1580 1581 for (;;) { 1582 cnp->cn_nameptr = cnp->cn_pnbuf; 1583 /* 1584 * Call lookup() to do the real work. If an error occurs, 1585 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 1586 * we do not have to dereference anything before returning. 1587 * In either case ni_startdir will be dereferenced and NULLed 1588 * out. 1589 */ 1590 error = lookup(ndp); 1591 if (error) 1592 break; 1593 1594 /* 1595 * Check for encountering a symbolic link. Trivial 1596 * termination occurs if no symlink encountered. 1597 * Note: zfree is safe because error is 0, so we will 1598 * not zfree it again when we break. 1599 */ 1600 if ((cnp->cn_flags & CNP_ISSYMLINK) == 0) { 1601 nfsrv_object_create(ndp->ni_vp); 1602 if (cnp->cn_flags & (CNP_SAVENAME | CNP_SAVESTART)) 1603 cnp->cn_flags |= CNP_HASBUF; 1604 else 1605 zfree(namei_zone, cnp->cn_pnbuf); 1606 break; 1607 } 1608 1609 /* 1610 * Validate symlink 1611 */ 1612 if ((cnp->cn_flags & CNP_LOCKPARENT) && ndp->ni_pathlen == 1) 1613 VOP_UNLOCK(ndp->ni_dvp, NULL, 0, td); 1614 if (!pubflag) { 1615 error = EINVAL; 1616 goto badlink2; 1617 } 1618 1619 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1620 error = ELOOP; 1621 goto badlink2; 1622 } 1623 if (ndp->ni_pathlen > 1) 1624 cp = zalloc(namei_zone); 1625 else 1626 cp = cnp->cn_pnbuf; 1627 aiov.iov_base = cp; 1628 aiov.iov_len = MAXPATHLEN; 1629 auio.uio_iov = &aiov; 1630 auio.uio_iovcnt = 1; 1631 auio.uio_offset = 0; 1632 auio.uio_rw = UIO_READ; 1633 auio.uio_segflg = UIO_SYSSPACE; 1634 auio.uio_td = NULL; 1635 auio.uio_resid = MAXPATHLEN; 1636 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1637 if (error) { 1638 badlink1: 1639 if (ndp->ni_pathlen > 1) 1640 zfree(namei_zone, cp); 1641 badlink2: 1642 vrele(ndp->ni_dvp); 1643 vput(ndp->ni_vp); 1644 break; 1645 } 1646 linklen = MAXPATHLEN - auio.uio_resid; 1647 if (linklen == 0) { 1648 error = ENOENT; 1649 goto badlink1; 1650 } 1651 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1652 error = ENAMETOOLONG; 1653 goto badlink1; 1654 } 1655 1656 /* 1657 * Adjust or replace path 1658 */ 1659 if (ndp->ni_pathlen > 1) { 1660 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 1661 zfree(namei_zone, cnp->cn_pnbuf); 1662 cnp->cn_pnbuf = cp; 1663 } else 1664 cnp->cn_pnbuf[linklen] = '\0'; 1665 ndp->ni_pathlen += linklen; 1666 1667 /* 1668 * Cleanup refs for next loop and check if root directory 1669 * should replace current directory. Normally ni_dvp 1670 * becomes the new base directory and is cleaned up when 1671 * we loop. Explicitly null pointers after invalidation 1672 * to clarify operation. 1673 */ 1674 vput(ndp->ni_vp); 1675 ndp->ni_vp = NULL; 1676 1677 if (cnp->cn_pnbuf[0] == '/') { 1678 vrele(ndp->ni_dvp); 1679 ndp->ni_dvp = ndp->ni_rootdir; 1680 vref(ndp->ni_dvp); 1681 } 1682 ndp->ni_startdir = ndp->ni_dvp; 1683 ndp->ni_dvp = NULL; 1684 } 1685 1686 /* 1687 * nfs_namei() guarentees that fields will not contain garbage 1688 * whether an error occurs or not. This allows the caller to track 1689 * cleanup state trivially. 1690 */ 1691 out: 1692 if (error) { 1693 zfree(namei_zone, cnp->cn_pnbuf); 1694 ndp->ni_vp = NULL; 1695 ndp->ni_dvp = NULL; 1696 ndp->ni_startdir = NULL; 1697 cnp->cn_flags &= ~CNP_HASBUF; 1698 } else if ((ndp->ni_cnd.cn_flags & (CNP_WANTPARENT|CNP_LOCKPARENT)) == 0) { 1699 ndp->ni_dvp = NULL; 1700 } 1701 return (error); 1702 } 1703 1704 /* 1705 * A fiddled version of m_adj() that ensures null fill to a long 1706 * boundary and only trims off the back end 1707 */ 1708 void 1709 nfsm_adj(struct mbuf *mp, int len, int nul) 1710 { 1711 struct mbuf *m; 1712 int count, i; 1713 char *cp; 1714 1715 /* 1716 * Trim from tail. Scan the mbuf chain, 1717 * calculating its length and finding the last mbuf. 1718 * If the adjustment only affects this mbuf, then just 1719 * adjust and return. Otherwise, rescan and truncate 1720 * after the remaining size. 1721 */ 1722 count = 0; 1723 m = mp; 1724 for (;;) { 1725 count += m->m_len; 1726 if (m->m_next == (struct mbuf *)0) 1727 break; 1728 m = m->m_next; 1729 } 1730 if (m->m_len > len) { 1731 m->m_len -= len; 1732 if (nul > 0) { 1733 cp = mtod(m, caddr_t)+m->m_len-nul; 1734 for (i = 0; i < nul; i++) 1735 *cp++ = '\0'; 1736 } 1737 return; 1738 } 1739 count -= len; 1740 if (count < 0) 1741 count = 0; 1742 /* 1743 * Correct length for chain is "count". 1744 * Find the mbuf with last data, adjust its length, 1745 * and toss data from remaining mbufs on chain. 1746 */ 1747 for (m = mp; m; m = m->m_next) { 1748 if (m->m_len >= count) { 1749 m->m_len = count; 1750 if (nul > 0) { 1751 cp = mtod(m, caddr_t)+m->m_len-nul; 1752 for (i = 0; i < nul; i++) 1753 *cp++ = '\0'; 1754 } 1755 break; 1756 } 1757 count -= m->m_len; 1758 } 1759 for (m = m->m_next;m;m = m->m_next) 1760 m->m_len = 0; 1761 } 1762 1763 /* 1764 * Make these functions instead of macros, so that the kernel text size 1765 * doesn't get too big... 1766 */ 1767 void 1768 nfsm_srvwcc(struct nfsrv_descript *nfsd, int before_ret, 1769 struct vattr *before_vap, int after_ret, struct vattr *after_vap, 1770 struct mbuf **mbp, char **bposp) 1771 { 1772 struct mbuf *mb = *mbp, *mb2; 1773 char *bpos = *bposp; 1774 u_int32_t *tl; 1775 1776 if (before_ret) { 1777 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1778 *tl = nfs_false; 1779 } else { 1780 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 1781 *tl++ = nfs_true; 1782 txdr_hyper(before_vap->va_size, tl); 1783 tl += 2; 1784 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1785 tl += 2; 1786 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1787 } 1788 *bposp = bpos; 1789 *mbp = mb; 1790 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1791 } 1792 1793 void 1794 nfsm_srvpostopattr(struct nfsrv_descript *nfsd, int after_ret, 1795 struct vattr *after_vap, struct mbuf **mbp, char **bposp) 1796 { 1797 struct mbuf *mb = *mbp, *mb2; 1798 char *bpos = *bposp; 1799 u_int32_t *tl; 1800 struct nfs_fattr *fp; 1801 1802 if (after_ret) { 1803 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1804 *tl = nfs_false; 1805 } else { 1806 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 1807 *tl++ = nfs_true; 1808 fp = (struct nfs_fattr *)tl; 1809 nfsm_srvfattr(nfsd, after_vap, fp); 1810 } 1811 *mbp = mb; 1812 *bposp = bpos; 1813 } 1814 1815 void 1816 nfsm_srvfattr(struct nfsrv_descript *nfsd, struct vattr *vap, 1817 struct nfs_fattr *fp) 1818 { 1819 1820 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1821 fp->fa_uid = txdr_unsigned(vap->va_uid); 1822 fp->fa_gid = txdr_unsigned(vap->va_gid); 1823 if (nfsd->nd_flag & ND_NFSV3) { 1824 fp->fa_type = vtonfsv3_type(vap->va_type); 1825 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1826 txdr_hyper(vap->va_size, &fp->fa3_size); 1827 txdr_hyper(vap->va_bytes, &fp->fa3_used); 1828 fp->fa3_rdev.specdata1 = txdr_unsigned(umajor(vap->va_rdev)); 1829 fp->fa3_rdev.specdata2 = txdr_unsigned(uminor(vap->va_rdev)); 1830 fp->fa3_fsid.nfsuquad[0] = 0; 1831 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1832 fp->fa3_fileid.nfsuquad[0] = 0; 1833 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1834 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1835 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1836 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1837 } else { 1838 fp->fa_type = vtonfsv2_type(vap->va_type); 1839 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1840 fp->fa2_size = txdr_unsigned(vap->va_size); 1841 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1842 if (vap->va_type == VFIFO) 1843 fp->fa2_rdev = 0xffffffff; 1844 else 1845 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1846 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1847 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1848 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1849 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1850 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1851 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1852 } 1853 } 1854 1855 /* 1856 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1857 * - look up fsid in mount list (if not found ret error) 1858 * - get vp and export rights by calling VFS_FHTOVP() 1859 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1860 * - if not lockflag unlock it with VOP_UNLOCK() 1861 */ 1862 int 1863 nfsrv_fhtovp(fhandle_t *fhp, int lockflag, struct vnode **vpp, 1864 struct ucred *cred, struct nfssvc_sock *slp, struct sockaddr *nam, 1865 int *rdonlyp, int kerbflag, int pubflag) 1866 { 1867 struct thread *td = curthread; /* XXX */ 1868 struct mount *mp; 1869 int i; 1870 struct ucred *credanon; 1871 int error, exflags; 1872 #ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */ 1873 struct sockaddr_int *saddr; 1874 #endif 1875 1876 *vpp = (struct vnode *)0; 1877 1878 if (nfs_ispublicfh(fhp)) { 1879 if (!pubflag || !nfs_pub.np_valid) 1880 return (ESTALE); 1881 fhp = &nfs_pub.np_handle; 1882 } 1883 1884 mp = vfs_getvfs(&fhp->fh_fsid); 1885 if (!mp) 1886 return (ESTALE); 1887 error = VFS_CHECKEXP(mp, nam, &exflags, &credanon); 1888 if (error) 1889 return (error); 1890 error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp); 1891 if (error) 1892 return (error); 1893 #ifdef MNT_EXNORESPORT 1894 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 1895 saddr = (struct sockaddr_in *)nam; 1896 if (saddr->sin_family == AF_INET && 1897 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 1898 vput(*vpp); 1899 *vpp = NULL; 1900 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1901 } 1902 } 1903 #endif 1904 /* 1905 * Check/setup credentials. 1906 */ 1907 if (exflags & MNT_EXKERB) { 1908 if (!kerbflag) { 1909 vput(*vpp); 1910 *vpp = NULL; 1911 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1912 } 1913 } else if (kerbflag) { 1914 vput(*vpp); 1915 *vpp = NULL; 1916 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1917 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1918 cred->cr_uid = credanon->cr_uid; 1919 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1920 cred->cr_groups[i] = credanon->cr_groups[i]; 1921 cred->cr_ngroups = i; 1922 } 1923 if (exflags & MNT_EXRDONLY) 1924 *rdonlyp = 1; 1925 else 1926 *rdonlyp = 0; 1927 1928 nfsrv_object_create(*vpp); 1929 1930 if (!lockflag) 1931 VOP_UNLOCK(*vpp, NULL, 0, td); 1932 return (0); 1933 } 1934 1935 1936 /* 1937 * WebNFS: check if a filehandle is a public filehandle. For v3, this 1938 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 1939 * transformed this to all zeroes in both cases, so check for it. 1940 */ 1941 int 1942 nfs_ispublicfh(fhandle_t *fhp) 1943 { 1944 char *cp = (char *)fhp; 1945 int i; 1946 1947 for (i = 0; i < NFSX_V3FH; i++) 1948 if (*cp++ != 0) 1949 return (FALSE); 1950 return (TRUE); 1951 } 1952 1953 #endif /* NFS_NOSERVER */ 1954 /* 1955 * This function compares two net addresses by family and returns TRUE 1956 * if they are the same host. 1957 * If there is any doubt, return FALSE. 1958 * The AF_INET family is handled as a special case so that address mbufs 1959 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1960 */ 1961 int 1962 netaddr_match(int family, union nethostaddr *haddr, struct sockaddr *nam) 1963 { 1964 struct sockaddr_in *inetaddr; 1965 1966 switch (family) { 1967 case AF_INET: 1968 inetaddr = (struct sockaddr_in *)nam; 1969 if (inetaddr->sin_family == AF_INET && 1970 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1971 return (1); 1972 break; 1973 default: 1974 break; 1975 }; 1976 return (0); 1977 } 1978 1979 static nfsuint64 nfs_nullcookie = { { 0, 0 } }; 1980 /* 1981 * This function finds the directory cookie that corresponds to the 1982 * logical byte offset given. 1983 */ 1984 nfsuint64 * 1985 nfs_getcookie(struct nfsnode *np, off_t off, int add) 1986 { 1987 struct nfsdmap *dp, *dp2; 1988 int pos; 1989 1990 pos = (uoff_t)off / NFS_DIRBLKSIZ; 1991 if (pos == 0 || off < 0) { 1992 #ifdef DIAGNOSTIC 1993 if (add) 1994 panic("nfs getcookie add at <= 0"); 1995 #endif 1996 return (&nfs_nullcookie); 1997 } 1998 pos--; 1999 dp = np->n_cookies.lh_first; 2000 if (!dp) { 2001 if (add) { 2002 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 2003 M_NFSDIROFF, M_WAITOK); 2004 dp->ndm_eocookie = 0; 2005 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 2006 } else 2007 return ((nfsuint64 *)0); 2008 } 2009 while (pos >= NFSNUMCOOKIES) { 2010 pos -= NFSNUMCOOKIES; 2011 if (dp->ndm_list.le_next) { 2012 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 2013 pos >= dp->ndm_eocookie) 2014 return ((nfsuint64 *)0); 2015 dp = dp->ndm_list.le_next; 2016 } else if (add) { 2017 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 2018 M_NFSDIROFF, M_WAITOK); 2019 dp2->ndm_eocookie = 0; 2020 LIST_INSERT_AFTER(dp, dp2, ndm_list); 2021 dp = dp2; 2022 } else 2023 return ((nfsuint64 *)0); 2024 } 2025 if (pos >= dp->ndm_eocookie) { 2026 if (add) 2027 dp->ndm_eocookie = pos + 1; 2028 else 2029 return ((nfsuint64 *)0); 2030 } 2031 return (&dp->ndm_cookies[pos]); 2032 } 2033 2034 /* 2035 * Invalidate cached directory information, except for the actual directory 2036 * blocks (which are invalidated separately). 2037 * Done mainly to avoid the use of stale offset cookies. 2038 */ 2039 void 2040 nfs_invaldir(struct vnode *vp) 2041 { 2042 struct nfsnode *np = VTONFS(vp); 2043 2044 #ifdef DIAGNOSTIC 2045 if (vp->v_type != VDIR) 2046 panic("nfs: invaldir not dir"); 2047 #endif 2048 np->n_direofoffset = 0; 2049 np->n_cookieverf.nfsuquad[0] = 0; 2050 np->n_cookieverf.nfsuquad[1] = 0; 2051 if (np->n_cookies.lh_first) 2052 np->n_cookies.lh_first->ndm_eocookie = 0; 2053 } 2054 2055 /* 2056 * The write verifier has changed (probably due to a server reboot), so all 2057 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2058 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2059 * and B_CLUSTEROK flags. Once done the new write verifier can be set for the 2060 * mount point. 2061 * 2062 * B_CLUSTEROK must be cleared along with B_NEEDCOMMIT because stage 1 data 2063 * writes are not clusterable. 2064 */ 2065 void 2066 nfs_clearcommit(struct mount *mp) 2067 { 2068 struct vnode *vp, *nvp; 2069 struct buf *bp, *nbp; 2070 lwkt_tokref ilock; 2071 int s; 2072 2073 lwkt_gettoken(&ilock, &mntvnode_token); 2074 s = splbio(); 2075 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp; vp = nvp) { 2076 nvp = TAILQ_NEXT(vp, v_nmntvnodes); /* ZZZ */ 2077 if (vp->v_flag & VPLACEMARKER) 2078 continue; 2079 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 2080 nbp = TAILQ_NEXT(bp, b_vnbufs); 2081 if (BUF_REFCNT(bp) == 0 && 2082 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) 2083 == (B_DELWRI | B_NEEDCOMMIT)) { 2084 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 2085 } 2086 } 2087 } 2088 splx(s); 2089 lwkt_reltoken(&ilock); 2090 } 2091 2092 #ifndef NFS_NOSERVER 2093 /* 2094 * Map errnos to NFS error numbers. For Version 3 also filter out error 2095 * numbers not specified for the associated procedure. 2096 */ 2097 int 2098 nfsrv_errmap(struct nfsrv_descript *nd, int err) 2099 { 2100 short *defaulterrp, *errp; 2101 2102 if (nd->nd_flag & ND_NFSV3) { 2103 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2104 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2105 while (*++errp) { 2106 if (*errp == err) 2107 return (err); 2108 else if (*errp > err) 2109 break; 2110 } 2111 return ((int)*defaulterrp); 2112 } else 2113 return (err & 0xffff); 2114 } 2115 if (err <= ELAST) 2116 return ((int)nfsrv_v2errmap[err - 1]); 2117 return (NFSERR_IO); 2118 } 2119 2120 int 2121 nfsrv_object_create(struct vnode *vp) 2122 { 2123 struct thread *td = curthread; 2124 2125 if (vp == NULL || vp->v_type != VREG) 2126 return (1); 2127 return (vfs_object_create(vp, td)); 2128 } 2129 2130 /* 2131 * Sort the group list in increasing numerical order. 2132 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 2133 * that used to be here.) 2134 */ 2135 void 2136 nfsrvw_sort(gid_t *list, int num) 2137 { 2138 int i, j; 2139 gid_t v; 2140 2141 /* Insertion sort. */ 2142 for (i = 1; i < num; i++) { 2143 v = list[i]; 2144 /* find correct slot for value v, moving others up */ 2145 for (j = i; --j >= 0 && v < list[j];) 2146 list[j + 1] = list[j]; 2147 list[j + 1] = v; 2148 } 2149 } 2150 2151 /* 2152 * copy credentials making sure that the result can be compared with bcmp(). 2153 */ 2154 void 2155 nfsrv_setcred(struct ucred *incred, struct ucred *outcred) 2156 { 2157 int i; 2158 2159 bzero((caddr_t)outcred, sizeof (struct ucred)); 2160 outcred->cr_ref = 1; 2161 outcred->cr_uid = incred->cr_uid; 2162 outcred->cr_ngroups = incred->cr_ngroups; 2163 for (i = 0; i < incred->cr_ngroups; i++) 2164 outcred->cr_groups[i] = incred->cr_groups[i]; 2165 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 2166 } 2167 #endif /* NFS_NOSERVER */ 2168