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 1.29 2005/04/20 17:01:54 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/nlookup.h> 54 #include <sys/namei.h> 55 #include <sys/mbuf.h> 56 #include <sys/socket.h> 57 #include <sys/stat.h> 58 #include <sys/malloc.h> 59 #include <sys/sysent.h> 60 #include <sys/syscall.h> 61 #include <sys/conf.h> 62 63 #include <vm/vm.h> 64 #include <vm/vm_object.h> 65 #include <vm/vm_extern.h> 66 #include <vm/vm_zone.h> 67 68 #include <sys/buf2.h> 69 70 #include "rpcv2.h" 71 #include "nfsproto.h" 72 #include "nfs.h" 73 #include "nfsmount.h" 74 #include "nfsnode.h" 75 #include "xdr_subs.h" 76 #include "nfsm_subs.h" 77 #include "nqnfs.h" 78 #include "nfsrtt.h" 79 80 #include <netinet/in.h> 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 int nfs_pbuf_freecnt = -1; /* start out unlimited */ 103 104 struct nfs_reqq nfs_reqq; 105 struct nfssvc_sockhead nfssvc_sockhead; 106 int nfssvc_sockhead_flag; 107 struct nfsd_head nfsd_head; 108 int nfsd_head_flag; 109 struct nfs_bufq nfs_bufq; 110 struct nqtimerhead nqtimerhead; 111 struct nqfhhashhead *nqfhhashtbl; 112 u_long nqfhhash; 113 114 static void (*nfs_prev_lease_updatetime) (int); 115 static int nfs_prev_nfssvc_sy_narg; 116 static sy_call_t *nfs_prev_nfssvc_sy_call; 117 118 #ifndef NFS_NOSERVER 119 120 static int (*nfs_prev_vop_lease_check)(struct vop_lease_args *); 121 122 /* 123 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 124 */ 125 int nfsv3_procid[NFS_NPROCS] = { 126 NFSPROC_NULL, 127 NFSPROC_GETATTR, 128 NFSPROC_SETATTR, 129 NFSPROC_NOOP, 130 NFSPROC_LOOKUP, 131 NFSPROC_READLINK, 132 NFSPROC_READ, 133 NFSPROC_NOOP, 134 NFSPROC_WRITE, 135 NFSPROC_CREATE, 136 NFSPROC_REMOVE, 137 NFSPROC_RENAME, 138 NFSPROC_LINK, 139 NFSPROC_SYMLINK, 140 NFSPROC_MKDIR, 141 NFSPROC_RMDIR, 142 NFSPROC_READDIR, 143 NFSPROC_FSSTAT, 144 NFSPROC_NOOP, 145 NFSPROC_NOOP, 146 NFSPROC_NOOP, 147 NFSPROC_NOOP, 148 NFSPROC_NOOP, 149 NFSPROC_NOOP, 150 NFSPROC_NOOP, 151 NFSPROC_NOOP 152 }; 153 154 #endif /* NFS_NOSERVER */ 155 /* 156 * and the reverse mapping from generic to Version 2 procedure numbers 157 */ 158 int nfsv2_procid[NFS_NPROCS] = { 159 NFSV2PROC_NULL, 160 NFSV2PROC_GETATTR, 161 NFSV2PROC_SETATTR, 162 NFSV2PROC_LOOKUP, 163 NFSV2PROC_NOOP, 164 NFSV2PROC_READLINK, 165 NFSV2PROC_READ, 166 NFSV2PROC_WRITE, 167 NFSV2PROC_CREATE, 168 NFSV2PROC_MKDIR, 169 NFSV2PROC_SYMLINK, 170 NFSV2PROC_CREATE, 171 NFSV2PROC_REMOVE, 172 NFSV2PROC_RMDIR, 173 NFSV2PROC_RENAME, 174 NFSV2PROC_LINK, 175 NFSV2PROC_READDIR, 176 NFSV2PROC_NOOP, 177 NFSV2PROC_STATFS, 178 NFSV2PROC_NOOP, 179 NFSV2PROC_NOOP, 180 NFSV2PROC_NOOP, 181 NFSV2PROC_NOOP, 182 NFSV2PROC_NOOP, 183 NFSV2PROC_NOOP, 184 NFSV2PROC_NOOP, 185 }; 186 187 #ifndef NFS_NOSERVER 188 /* 189 * Maps errno values to nfs error numbers. 190 * Use NFSERR_IO as the catch all for ones not specifically defined in 191 * RFC 1094. 192 */ 193 static u_char nfsrv_v2errmap[ELAST] = { 194 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 195 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 196 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 197 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 198 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 199 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 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_IO, NFSERR_IO, NFSERR_IO, 206 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 207 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 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, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 211 NFSERR_IO /* << Last is 86 */ 212 }; 213 214 /* 215 * Maps errno values to nfs error numbers. 216 * Although it is not obvious whether or not NFS clients really care if 217 * a returned error value is in the specified list for the procedure, the 218 * safest thing to do is filter them appropriately. For Version 2, the 219 * X/Open XNFS document is the only specification that defines error values 220 * for each RPC (The RFC simply lists all possible error values for all RPCs), 221 * so I have decided to not do this for Version 2. 222 * The first entry is the default error return and the rest are the valid 223 * errors for that RPC in increasing numeric order. 224 */ 225 static short nfsv3err_null[] = { 226 0, 227 0, 228 }; 229 230 static short nfsv3err_getattr[] = { 231 NFSERR_IO, 232 NFSERR_IO, 233 NFSERR_STALE, 234 NFSERR_BADHANDLE, 235 NFSERR_SERVERFAULT, 236 0, 237 }; 238 239 static short nfsv3err_setattr[] = { 240 NFSERR_IO, 241 NFSERR_PERM, 242 NFSERR_IO, 243 NFSERR_ACCES, 244 NFSERR_INVAL, 245 NFSERR_NOSPC, 246 NFSERR_ROFS, 247 NFSERR_DQUOT, 248 NFSERR_STALE, 249 NFSERR_BADHANDLE, 250 NFSERR_NOT_SYNC, 251 NFSERR_SERVERFAULT, 252 0, 253 }; 254 255 static short nfsv3err_lookup[] = { 256 NFSERR_IO, 257 NFSERR_NOENT, 258 NFSERR_IO, 259 NFSERR_ACCES, 260 NFSERR_NOTDIR, 261 NFSERR_NAMETOL, 262 NFSERR_STALE, 263 NFSERR_BADHANDLE, 264 NFSERR_SERVERFAULT, 265 0, 266 }; 267 268 static short nfsv3err_access[] = { 269 NFSERR_IO, 270 NFSERR_IO, 271 NFSERR_STALE, 272 NFSERR_BADHANDLE, 273 NFSERR_SERVERFAULT, 274 0, 275 }; 276 277 static short nfsv3err_readlink[] = { 278 NFSERR_IO, 279 NFSERR_IO, 280 NFSERR_ACCES, 281 NFSERR_INVAL, 282 NFSERR_STALE, 283 NFSERR_BADHANDLE, 284 NFSERR_NOTSUPP, 285 NFSERR_SERVERFAULT, 286 0, 287 }; 288 289 static short nfsv3err_read[] = { 290 NFSERR_IO, 291 NFSERR_IO, 292 NFSERR_NXIO, 293 NFSERR_ACCES, 294 NFSERR_INVAL, 295 NFSERR_STALE, 296 NFSERR_BADHANDLE, 297 NFSERR_SERVERFAULT, 298 0, 299 }; 300 301 static short nfsv3err_write[] = { 302 NFSERR_IO, 303 NFSERR_IO, 304 NFSERR_ACCES, 305 NFSERR_INVAL, 306 NFSERR_FBIG, 307 NFSERR_NOSPC, 308 NFSERR_ROFS, 309 NFSERR_DQUOT, 310 NFSERR_STALE, 311 NFSERR_BADHANDLE, 312 NFSERR_SERVERFAULT, 313 0, 314 }; 315 316 static short nfsv3err_create[] = { 317 NFSERR_IO, 318 NFSERR_IO, 319 NFSERR_ACCES, 320 NFSERR_EXIST, 321 NFSERR_NOTDIR, 322 NFSERR_NOSPC, 323 NFSERR_ROFS, 324 NFSERR_NAMETOL, 325 NFSERR_DQUOT, 326 NFSERR_STALE, 327 NFSERR_BADHANDLE, 328 NFSERR_NOTSUPP, 329 NFSERR_SERVERFAULT, 330 0, 331 }; 332 333 static short nfsv3err_mkdir[] = { 334 NFSERR_IO, 335 NFSERR_IO, 336 NFSERR_ACCES, 337 NFSERR_EXIST, 338 NFSERR_NOTDIR, 339 NFSERR_NOSPC, 340 NFSERR_ROFS, 341 NFSERR_NAMETOL, 342 NFSERR_DQUOT, 343 NFSERR_STALE, 344 NFSERR_BADHANDLE, 345 NFSERR_NOTSUPP, 346 NFSERR_SERVERFAULT, 347 0, 348 }; 349 350 static short nfsv3err_symlink[] = { 351 NFSERR_IO, 352 NFSERR_IO, 353 NFSERR_ACCES, 354 NFSERR_EXIST, 355 NFSERR_NOTDIR, 356 NFSERR_NOSPC, 357 NFSERR_ROFS, 358 NFSERR_NAMETOL, 359 NFSERR_DQUOT, 360 NFSERR_STALE, 361 NFSERR_BADHANDLE, 362 NFSERR_NOTSUPP, 363 NFSERR_SERVERFAULT, 364 0, 365 }; 366 367 static short nfsv3err_mknod[] = { 368 NFSERR_IO, 369 NFSERR_IO, 370 NFSERR_ACCES, 371 NFSERR_EXIST, 372 NFSERR_NOTDIR, 373 NFSERR_NOSPC, 374 NFSERR_ROFS, 375 NFSERR_NAMETOL, 376 NFSERR_DQUOT, 377 NFSERR_STALE, 378 NFSERR_BADHANDLE, 379 NFSERR_NOTSUPP, 380 NFSERR_SERVERFAULT, 381 NFSERR_BADTYPE, 382 0, 383 }; 384 385 static short nfsv3err_remove[] = { 386 NFSERR_IO, 387 NFSERR_NOENT, 388 NFSERR_IO, 389 NFSERR_ACCES, 390 NFSERR_NOTDIR, 391 NFSERR_ROFS, 392 NFSERR_NAMETOL, 393 NFSERR_STALE, 394 NFSERR_BADHANDLE, 395 NFSERR_SERVERFAULT, 396 0, 397 }; 398 399 static short nfsv3err_rmdir[] = { 400 NFSERR_IO, 401 NFSERR_NOENT, 402 NFSERR_IO, 403 NFSERR_ACCES, 404 NFSERR_EXIST, 405 NFSERR_NOTDIR, 406 NFSERR_INVAL, 407 NFSERR_ROFS, 408 NFSERR_NAMETOL, 409 NFSERR_NOTEMPTY, 410 NFSERR_STALE, 411 NFSERR_BADHANDLE, 412 NFSERR_NOTSUPP, 413 NFSERR_SERVERFAULT, 414 0, 415 }; 416 417 static short nfsv3err_rename[] = { 418 NFSERR_IO, 419 NFSERR_NOENT, 420 NFSERR_IO, 421 NFSERR_ACCES, 422 NFSERR_EXIST, 423 NFSERR_XDEV, 424 NFSERR_NOTDIR, 425 NFSERR_ISDIR, 426 NFSERR_INVAL, 427 NFSERR_NOSPC, 428 NFSERR_ROFS, 429 NFSERR_MLINK, 430 NFSERR_NAMETOL, 431 NFSERR_NOTEMPTY, 432 NFSERR_DQUOT, 433 NFSERR_STALE, 434 NFSERR_BADHANDLE, 435 NFSERR_NOTSUPP, 436 NFSERR_SERVERFAULT, 437 0, 438 }; 439 440 static short nfsv3err_link[] = { 441 NFSERR_IO, 442 NFSERR_IO, 443 NFSERR_ACCES, 444 NFSERR_EXIST, 445 NFSERR_XDEV, 446 NFSERR_NOTDIR, 447 NFSERR_INVAL, 448 NFSERR_NOSPC, 449 NFSERR_ROFS, 450 NFSERR_MLINK, 451 NFSERR_NAMETOL, 452 NFSERR_DQUOT, 453 NFSERR_STALE, 454 NFSERR_BADHANDLE, 455 NFSERR_NOTSUPP, 456 NFSERR_SERVERFAULT, 457 0, 458 }; 459 460 static short nfsv3err_readdir[] = { 461 NFSERR_IO, 462 NFSERR_IO, 463 NFSERR_ACCES, 464 NFSERR_NOTDIR, 465 NFSERR_STALE, 466 NFSERR_BADHANDLE, 467 NFSERR_BAD_COOKIE, 468 NFSERR_TOOSMALL, 469 NFSERR_SERVERFAULT, 470 0, 471 }; 472 473 static short nfsv3err_readdirplus[] = { 474 NFSERR_IO, 475 NFSERR_IO, 476 NFSERR_ACCES, 477 NFSERR_NOTDIR, 478 NFSERR_STALE, 479 NFSERR_BADHANDLE, 480 NFSERR_BAD_COOKIE, 481 NFSERR_NOTSUPP, 482 NFSERR_TOOSMALL, 483 NFSERR_SERVERFAULT, 484 0, 485 }; 486 487 static short nfsv3err_fsstat[] = { 488 NFSERR_IO, 489 NFSERR_IO, 490 NFSERR_STALE, 491 NFSERR_BADHANDLE, 492 NFSERR_SERVERFAULT, 493 0, 494 }; 495 496 static short nfsv3err_fsinfo[] = { 497 NFSERR_STALE, 498 NFSERR_STALE, 499 NFSERR_BADHANDLE, 500 NFSERR_SERVERFAULT, 501 0, 502 }; 503 504 static short nfsv3err_pathconf[] = { 505 NFSERR_STALE, 506 NFSERR_STALE, 507 NFSERR_BADHANDLE, 508 NFSERR_SERVERFAULT, 509 0, 510 }; 511 512 static short nfsv3err_commit[] = { 513 NFSERR_IO, 514 NFSERR_IO, 515 NFSERR_STALE, 516 NFSERR_BADHANDLE, 517 NFSERR_SERVERFAULT, 518 0, 519 }; 520 521 static short *nfsrv_v3errmap[] = { 522 nfsv3err_null, 523 nfsv3err_getattr, 524 nfsv3err_setattr, 525 nfsv3err_lookup, 526 nfsv3err_access, 527 nfsv3err_readlink, 528 nfsv3err_read, 529 nfsv3err_write, 530 nfsv3err_create, 531 nfsv3err_mkdir, 532 nfsv3err_symlink, 533 nfsv3err_mknod, 534 nfsv3err_remove, 535 nfsv3err_rmdir, 536 nfsv3err_rename, 537 nfsv3err_link, 538 nfsv3err_readdir, 539 nfsv3err_readdirplus, 540 nfsv3err_fsstat, 541 nfsv3err_fsinfo, 542 nfsv3err_pathconf, 543 nfsv3err_commit, 544 }; 545 546 #endif /* NFS_NOSERVER */ 547 548 extern struct nfsrtt nfsrtt; 549 extern time_t nqnfsstarttime; 550 extern int nqsrv_clockskew; 551 extern int nqsrv_writeslack; 552 extern int nqsrv_maxlease; 553 extern struct nfsstats nfsstats; 554 extern int nqnfs_piggy[NFS_NPROCS]; 555 extern nfstype nfsv2_type[9]; 556 extern nfstype nfsv3_type[9]; 557 extern struct nfsnodehashhead *nfsnodehashtbl; 558 extern u_long nfsnodehash; 559 560 struct nfssvc_args; 561 extern int nfssvc(struct proc *, struct nfssvc_args *, int *); 562 563 LIST_HEAD(nfsnodehashhead, nfsnode); 564 565 u_quad_t 566 nfs_curusec(void) 567 { 568 struct timeval tv; 569 570 getmicrotime(&tv); 571 return ((u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec); 572 } 573 574 /* 575 * Create the header for an rpc request packet 576 * The hsiz is the size of the rest of the nfs request header. 577 * (just used to decide if a cluster is a good idea) 578 */ 579 struct mbuf * 580 nfsm_reqh(struct vnode *vp, u_long procid, int hsiz, caddr_t *bposp) 581 { 582 struct mbuf *mb; 583 u_int32_t *tl; 584 caddr_t bpos; 585 struct mbuf *mb2; 586 struct nfsmount *nmp; 587 int nqflag; 588 589 MGET(mb, MB_WAIT, MT_DATA); 590 if (hsiz >= MINCLSIZE) 591 MCLGET(mb, MB_WAIT); 592 mb->m_len = 0; 593 bpos = mtod(mb, caddr_t); 594 595 /* 596 * For NQNFS, add lease request. 597 */ 598 if (vp) { 599 nmp = VFSTONFS(vp->v_mount); 600 if (nmp->nm_flag & NFSMNT_NQNFS) { 601 nqflag = NQNFS_NEEDLEASE(vp, procid); 602 if (nqflag) { 603 nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED); 604 *tl++ = txdr_unsigned(nqflag); 605 *tl = txdr_unsigned(nmp->nm_leaseterm); 606 } else { 607 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 608 *tl = 0; 609 } 610 } 611 } 612 /* Finally, return values */ 613 *bposp = bpos; 614 return (mb); 615 } 616 617 /* 618 * Build the RPC header and fill in the authorization info. 619 * The authorization string argument is only used when the credentials 620 * come from outside of the kernel. 621 * Returns the head of the mbuf list. 622 */ 623 struct mbuf * 624 nfsm_rpchead(struct ucred *cr, int nmflag, int procid, int auth_type, 625 int auth_len, char *auth_str, int verf_len, char *verf_str, 626 struct mbuf *mrest, int mrest_len, struct mbuf **mbp, 627 u_int32_t *xidp) 628 { 629 struct mbuf *mb; 630 u_int32_t *tl; 631 caddr_t bpos; 632 int i; 633 struct mbuf *mreq, *mb2; 634 int siz, grpsiz, authsiz; 635 636 authsiz = nfsm_rndup(auth_len); 637 MGETHDR(mb, MB_WAIT, MT_DATA); 638 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 639 MCLGET(mb, MB_WAIT); 640 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 641 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 642 } else { 643 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 644 } 645 mb->m_len = 0; 646 mreq = mb; 647 bpos = mtod(mb, caddr_t); 648 649 /* 650 * First the RPC header. 651 */ 652 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 653 654 /* Get a pretty random xid to start with */ 655 if (!nfs_xid) 656 nfs_xid = random(); 657 /* 658 * Skip zero xid if it should ever happen. 659 */ 660 if (++nfs_xid == 0) 661 nfs_xid++; 662 663 *tl++ = *xidp = txdr_unsigned(nfs_xid); 664 *tl++ = rpc_call; 665 *tl++ = rpc_vers; 666 if (nmflag & NFSMNT_NQNFS) { 667 *tl++ = txdr_unsigned(NQNFS_PROG); 668 *tl++ = txdr_unsigned(NQNFS_VER3); 669 } else { 670 *tl++ = txdr_unsigned(NFS_PROG); 671 if (nmflag & NFSMNT_NFSV3) 672 *tl++ = txdr_unsigned(NFS_VER3); 673 else 674 *tl++ = txdr_unsigned(NFS_VER2); 675 } 676 if (nmflag & NFSMNT_NFSV3) 677 *tl++ = txdr_unsigned(procid); 678 else 679 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 680 681 /* 682 * And then the authorization cred. 683 */ 684 *tl++ = txdr_unsigned(auth_type); 685 *tl = txdr_unsigned(authsiz); 686 switch (auth_type) { 687 case RPCAUTH_UNIX: 688 nfsm_build(tl, u_int32_t *, auth_len); 689 *tl++ = 0; /* stamp ?? */ 690 *tl++ = 0; /* NULL hostname */ 691 *tl++ = txdr_unsigned(cr->cr_uid); 692 *tl++ = txdr_unsigned(cr->cr_groups[0]); 693 grpsiz = (auth_len >> 2) - 5; 694 *tl++ = txdr_unsigned(grpsiz); 695 for (i = 1; i <= grpsiz; i++) 696 *tl++ = txdr_unsigned(cr->cr_groups[i]); 697 break; 698 case RPCAUTH_KERB4: 699 siz = auth_len; 700 while (siz > 0) { 701 if (M_TRAILINGSPACE(mb) == 0) { 702 MGET(mb2, MB_WAIT, MT_DATA); 703 if (siz >= MINCLSIZE) 704 MCLGET(mb2, MB_WAIT); 705 mb->m_next = mb2; 706 mb = mb2; 707 mb->m_len = 0; 708 bpos = mtod(mb, caddr_t); 709 } 710 i = min(siz, M_TRAILINGSPACE(mb)); 711 bcopy(auth_str, bpos, i); 712 mb->m_len += i; 713 auth_str += i; 714 bpos += i; 715 siz -= i; 716 } 717 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 718 for (i = 0; i < siz; i++) 719 *bpos++ = '\0'; 720 mb->m_len += siz; 721 } 722 break; 723 }; 724 725 /* 726 * And the verifier... 727 */ 728 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 729 if (verf_str) { 730 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 731 *tl = txdr_unsigned(verf_len); 732 siz = verf_len; 733 while (siz > 0) { 734 if (M_TRAILINGSPACE(mb) == 0) { 735 MGET(mb2, MB_WAIT, MT_DATA); 736 if (siz >= MINCLSIZE) 737 MCLGET(mb2, MB_WAIT); 738 mb->m_next = mb2; 739 mb = mb2; 740 mb->m_len = 0; 741 bpos = mtod(mb, caddr_t); 742 } 743 i = min(siz, M_TRAILINGSPACE(mb)); 744 bcopy(verf_str, bpos, i); 745 mb->m_len += i; 746 verf_str += i; 747 bpos += i; 748 siz -= i; 749 } 750 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 751 for (i = 0; i < siz; i++) 752 *bpos++ = '\0'; 753 mb->m_len += siz; 754 } 755 } else { 756 *tl++ = txdr_unsigned(RPCAUTH_NULL); 757 *tl = 0; 758 } 759 mb->m_next = mrest; 760 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 761 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 762 *mbp = mb; 763 return (mreq); 764 } 765 766 /* 767 * copies mbuf chain to the uio scatter/gather list 768 */ 769 int 770 nfsm_mbuftouio(struct mbuf **mrep, struct uio *uiop, int siz, caddr_t *dpos) 771 { 772 char *mbufcp, *uiocp; 773 int xfer, left, len; 774 struct mbuf *mp; 775 long uiosiz, rem; 776 int error = 0; 777 778 mp = *mrep; 779 mbufcp = *dpos; 780 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 781 rem = nfsm_rndup(siz)-siz; 782 while (siz > 0) { 783 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 784 return (EFBIG); 785 left = uiop->uio_iov->iov_len; 786 uiocp = uiop->uio_iov->iov_base; 787 if (left > siz) 788 left = siz; 789 uiosiz = left; 790 while (left > 0) { 791 while (len == 0) { 792 mp = mp->m_next; 793 if (mp == NULL) 794 return (EBADRPC); 795 mbufcp = mtod(mp, caddr_t); 796 len = mp->m_len; 797 } 798 xfer = (left > len) ? len : left; 799 #ifdef notdef 800 /* Not Yet.. */ 801 if (uiop->uio_iov->iov_op != NULL) 802 (*(uiop->uio_iov->iov_op)) 803 (mbufcp, uiocp, xfer); 804 else 805 #endif 806 if (uiop->uio_segflg == UIO_SYSSPACE) 807 bcopy(mbufcp, uiocp, xfer); 808 else 809 copyout(mbufcp, uiocp, xfer); 810 left -= xfer; 811 len -= xfer; 812 mbufcp += xfer; 813 uiocp += xfer; 814 uiop->uio_offset += xfer; 815 uiop->uio_resid -= xfer; 816 } 817 if (uiop->uio_iov->iov_len <= siz) { 818 uiop->uio_iovcnt--; 819 uiop->uio_iov++; 820 } else { 821 uiop->uio_iov->iov_base += uiosiz; 822 uiop->uio_iov->iov_len -= uiosiz; 823 } 824 siz -= uiosiz; 825 } 826 *dpos = mbufcp; 827 *mrep = mp; 828 if (rem > 0) { 829 if (len < rem) 830 error = nfs_adv(mrep, dpos, rem, len); 831 else 832 *dpos += rem; 833 } 834 return (error); 835 } 836 837 /* 838 * copies a uio scatter/gather list to an mbuf chain. 839 * NOTE: can ony handle iovcnt == 1 840 */ 841 int 842 nfsm_uiotombuf(struct uio *uiop, struct mbuf **mq, int siz, caddr_t *bpos) 843 { 844 char *uiocp; 845 struct mbuf *mp, *mp2; 846 int xfer, left, mlen; 847 int uiosiz, clflg, rem; 848 char *cp; 849 850 #ifdef DIAGNOSTIC 851 if (uiop->uio_iovcnt != 1) 852 panic("nfsm_uiotombuf: iovcnt != 1"); 853 #endif 854 855 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 856 clflg = 1; 857 else 858 clflg = 0; 859 rem = nfsm_rndup(siz)-siz; 860 mp = mp2 = *mq; 861 while (siz > 0) { 862 left = uiop->uio_iov->iov_len; 863 uiocp = uiop->uio_iov->iov_base; 864 if (left > siz) 865 left = siz; 866 uiosiz = left; 867 while (left > 0) { 868 mlen = M_TRAILINGSPACE(mp); 869 if (mlen == 0) { 870 MGET(mp, MB_WAIT, MT_DATA); 871 if (clflg) 872 MCLGET(mp, MB_WAIT); 873 mp->m_len = 0; 874 mp2->m_next = mp; 875 mp2 = mp; 876 mlen = M_TRAILINGSPACE(mp); 877 } 878 xfer = (left > mlen) ? mlen : left; 879 #ifdef notdef 880 /* Not Yet.. */ 881 if (uiop->uio_iov->iov_op != NULL) 882 (*(uiop->uio_iov->iov_op)) 883 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 884 else 885 #endif 886 if (uiop->uio_segflg == UIO_SYSSPACE) 887 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 888 else 889 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 890 mp->m_len += xfer; 891 left -= xfer; 892 uiocp += xfer; 893 uiop->uio_offset += xfer; 894 uiop->uio_resid -= xfer; 895 } 896 uiop->uio_iov->iov_base += uiosiz; 897 uiop->uio_iov->iov_len -= uiosiz; 898 siz -= uiosiz; 899 } 900 if (rem > 0) { 901 if (rem > M_TRAILINGSPACE(mp)) { 902 MGET(mp, MB_WAIT, MT_DATA); 903 mp->m_len = 0; 904 mp2->m_next = mp; 905 } 906 cp = mtod(mp, caddr_t)+mp->m_len; 907 for (left = 0; left < rem; left++) 908 *cp++ = '\0'; 909 mp->m_len += rem; 910 *bpos = cp; 911 } else 912 *bpos = mtod(mp, caddr_t)+mp->m_len; 913 *mq = mp; 914 return (0); 915 } 916 917 /* 918 * Help break down an mbuf chain by setting the first siz bytes contiguous 919 * pointed to by returned val. 920 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 921 * cases. (The macros use the vars. dpos and dpos2) 922 */ 923 int 924 nfsm_disct(struct mbuf **mdp, caddr_t *dposp, int siz, int left, caddr_t *cp2) 925 { 926 struct mbuf *mp, *mp2; 927 int siz2, xfer; 928 caddr_t p; 929 930 mp = *mdp; 931 while (left == 0) { 932 *mdp = mp = mp->m_next; 933 if (mp == NULL) 934 return (EBADRPC); 935 left = mp->m_len; 936 *dposp = mtod(mp, caddr_t); 937 } 938 if (left >= siz) { 939 *cp2 = *dposp; 940 *dposp += siz; 941 } else if (mp->m_next == NULL) { 942 return (EBADRPC); 943 } else if (siz > MHLEN) { 944 panic("nfs S too big"); 945 } else { 946 MGET(mp2, MB_WAIT, MT_DATA); 947 mp2->m_next = mp->m_next; 948 mp->m_next = mp2; 949 mp->m_len -= left; 950 mp = mp2; 951 *cp2 = p = mtod(mp, caddr_t); 952 bcopy(*dposp, p, left); /* Copy what was left */ 953 siz2 = siz-left; 954 p += left; 955 mp2 = mp->m_next; 956 /* Loop around copying up the siz2 bytes */ 957 while (siz2 > 0) { 958 if (mp2 == NULL) 959 return (EBADRPC); 960 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 961 if (xfer > 0) { 962 bcopy(mtod(mp2, caddr_t), p, xfer); 963 NFSMADV(mp2, xfer); 964 mp2->m_len -= xfer; 965 p += xfer; 966 siz2 -= xfer; 967 } 968 if (siz2 > 0) 969 mp2 = mp2->m_next; 970 } 971 mp->m_len = siz; 972 *mdp = mp2; 973 *dposp = mtod(mp2, caddr_t); 974 } 975 return (0); 976 } 977 978 /* 979 * Advance the position in the mbuf chain. 980 */ 981 int 982 nfs_adv(struct mbuf **mdp, caddr_t *dposp, int offs, int left) 983 { 984 struct mbuf *m; 985 int s; 986 987 m = *mdp; 988 s = left; 989 while (s < offs) { 990 offs -= s; 991 m = m->m_next; 992 if (m == NULL) 993 return (EBADRPC); 994 s = m->m_len; 995 } 996 *mdp = m; 997 *dposp = mtod(m, caddr_t)+offs; 998 return (0); 999 } 1000 1001 /* 1002 * Copy a string into mbufs for the hard cases... 1003 */ 1004 int 1005 nfsm_strtmbuf(struct mbuf **mb, char **bpos, const char *cp, long siz) 1006 { 1007 struct mbuf *m1 = NULL, *m2; 1008 long left, xfer, len, tlen; 1009 u_int32_t *tl; 1010 int putsize; 1011 1012 putsize = 1; 1013 m2 = *mb; 1014 left = M_TRAILINGSPACE(m2); 1015 if (left > 0) { 1016 tl = ((u_int32_t *)(*bpos)); 1017 *tl++ = txdr_unsigned(siz); 1018 putsize = 0; 1019 left -= NFSX_UNSIGNED; 1020 m2->m_len += NFSX_UNSIGNED; 1021 if (left > 0) { 1022 bcopy(cp, (caddr_t) tl, left); 1023 siz -= left; 1024 cp += left; 1025 m2->m_len += left; 1026 left = 0; 1027 } 1028 } 1029 /* Loop around adding mbufs */ 1030 while (siz > 0) { 1031 MGET(m1, MB_WAIT, MT_DATA); 1032 if (siz > MLEN) 1033 MCLGET(m1, MB_WAIT); 1034 m1->m_len = NFSMSIZ(m1); 1035 m2->m_next = m1; 1036 m2 = m1; 1037 tl = mtod(m1, u_int32_t *); 1038 tlen = 0; 1039 if (putsize) { 1040 *tl++ = txdr_unsigned(siz); 1041 m1->m_len -= NFSX_UNSIGNED; 1042 tlen = NFSX_UNSIGNED; 1043 putsize = 0; 1044 } 1045 if (siz < m1->m_len) { 1046 len = nfsm_rndup(siz); 1047 xfer = siz; 1048 if (xfer < len) 1049 *(tl+(xfer>>2)) = 0; 1050 } else { 1051 xfer = len = m1->m_len; 1052 } 1053 bcopy(cp, (caddr_t) tl, xfer); 1054 m1->m_len = len+tlen; 1055 siz -= xfer; 1056 cp += xfer; 1057 } 1058 *mb = m1; 1059 *bpos = mtod(m1, caddr_t)+m1->m_len; 1060 return (0); 1061 } 1062 1063 /* 1064 * Called once to initialize data structures... 1065 */ 1066 int 1067 nfs_init(struct vfsconf *vfsp) 1068 { 1069 int i; 1070 1071 callout_init(&nfs_timer_handle); 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 callout_stop(&nfs_timer_handle); 1146 nfs_mount_type = -1; 1147 #ifndef NFS_NOSERVER 1148 default_vnode_vops->vop_lease = nfs_prev_vop_lease_check; 1149 #endif 1150 lease_updatetime = nfs_prev_lease_updatetime; 1151 sysent[SYS_nfssvc].sy_narg = nfs_prev_nfssvc_sy_narg; 1152 sysent[SYS_nfssvc].sy_call = nfs_prev_nfssvc_sy_call; 1153 return (0); 1154 } 1155 1156 /* 1157 * Attribute cache routines. 1158 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1159 * that are on the mbuf list 1160 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1161 * error otherwise 1162 */ 1163 1164 /* 1165 * Load the attribute cache (that lives in the nfsnode entry) with 1166 * the values on the mbuf list. Load *vaper with the attributes. vaper 1167 * may be NULL. 1168 * 1169 * As a side effect n_mtime, which we use to determine if the file was 1170 * modified by some other host, is set to the attribute timestamp and 1171 * NRMODIFIED is set if the two values differ. 1172 * 1173 * WARNING: the mtime loaded into vaper does not necessarily represent 1174 * n_mtime or n_attr.mtime due to NACC and NUPD. 1175 */ 1176 int 1177 nfs_loadattrcache(struct vnode **vpp, struct mbuf **mdp, caddr_t *dposp, 1178 struct vattr *vaper, int lattr_flags) 1179 { 1180 struct vnode *vp = *vpp; 1181 struct vattr *vap; 1182 struct nfs_fattr *fp; 1183 struct nfsnode *np; 1184 int32_t t1; 1185 caddr_t cp2; 1186 int error = 0; 1187 udev_t rdev; 1188 struct mbuf *md; 1189 enum vtype vtyp; 1190 u_short vmode; 1191 struct timespec mtime; 1192 int v3 = NFS_ISV3(vp); 1193 1194 md = *mdp; 1195 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1196 if ((error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) != 0) 1197 return (error); 1198 fp = (struct nfs_fattr *)cp2; 1199 if (v3) { 1200 vtyp = nfsv3tov_type(fp->fa_type); 1201 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1202 rdev = makeudev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), 1203 fxdr_unsigned(int, fp->fa3_rdev.specdata2)); 1204 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1205 } else { 1206 vtyp = nfsv2tov_type(fp->fa_type); 1207 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1208 /* 1209 * XXX 1210 * 1211 * The duplicate information returned in fa_type and fa_mode 1212 * is an ambiguity in the NFS version 2 protocol. 1213 * 1214 * VREG should be taken literally as a regular file. If a 1215 * server intents to return some type information differently 1216 * in the upper bits of the mode field (e.g. for sockets, or 1217 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1218 * leave the examination of the mode bits even in the VREG 1219 * case to avoid breakage for bogus servers, but we make sure 1220 * that there are actually type bits set in the upper part of 1221 * fa_mode (and failing that, trust the va_type field). 1222 * 1223 * NFSv3 cleared the issue, and requires fa_mode to not 1224 * contain any type information (while also introduing sockets 1225 * and FIFOs for fa_type). 1226 */ 1227 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1228 vtyp = IFTOVT(vmode); 1229 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1230 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1231 1232 /* 1233 * Really ugly NFSv2 kludge. 1234 */ 1235 if (vtyp == VCHR && rdev == (udev_t)0xffffffff) 1236 vtyp = VFIFO; 1237 } 1238 1239 /* 1240 * If v_type == VNON it is a new node, so fill in the v_type, 1241 * n_mtime fields. Check to see if it represents a special 1242 * device, and if so, check for a possible alias. Once the 1243 * correct vnode has been obtained, fill in the rest of the 1244 * information. 1245 */ 1246 np = VTONFS(vp); 1247 if (vp->v_type != vtyp) { 1248 vp->v_type = vtyp; 1249 if (vp->v_type == VFIFO) { 1250 vp->v_ops = &vp->v_mount->mnt_vn_fifo_ops; 1251 } else if (vp->v_type == VCHR || vp->v_type == VBLK) { 1252 vp->v_ops = &vp->v_mount->mnt_vn_spec_ops; 1253 addaliasu(vp, rdev); 1254 } else { 1255 vp->v_ops = &vp->v_mount->mnt_vn_use_ops; 1256 } 1257 np->n_mtime = mtime.tv_sec; 1258 } else if (np->n_mtime != mtime.tv_sec) { 1259 /* 1260 * If we haven't modified the file locally and the server 1261 * timestamp does not match, then the server probably 1262 * modified the file. We must flag this condition so 1263 * the proper syncnronization can be done. We do not 1264 * try to synchronize the state here because that 1265 * could lead to an endless recursion. 1266 * 1267 * XXX loadattrcache can be set during the reply to a write, 1268 * before the write timestamp is properly processed. To 1269 * avoid unconditionally setting the rmodified bit (which 1270 * has the effect of flushing the cache), we only do this 1271 * check if the lmodified bit is not set. 1272 */ 1273 np->n_mtime = mtime.tv_sec; 1274 if ((lattr_flags & NFS_LATTR_NOMTIMECHECK) == 0) 1275 np->n_flag |= NRMODIFIED; 1276 } 1277 vap = &np->n_vattr; 1278 vap->va_type = vtyp; 1279 vap->va_mode = (vmode & 07777); 1280 vap->va_rdev = rdev; 1281 vap->va_mtime = mtime; 1282 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1283 if (v3) { 1284 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1285 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1286 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1287 vap->va_size = fxdr_hyper(&fp->fa3_size); 1288 vap->va_blocksize = NFS_FABLKSIZE; 1289 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 1290 vap->va_fileid = fxdr_unsigned(int32_t, 1291 fp->fa3_fileid.nfsuquad[1]); 1292 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1293 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1294 vap->va_flags = 0; 1295 vap->va_filerev = 0; 1296 } else { 1297 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1298 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1299 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1300 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1301 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); 1302 vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) 1303 * NFS_FABLKSIZE; 1304 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1305 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1306 vap->va_flags = 0; 1307 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1308 fp->fa2_ctime.nfsv2_sec); 1309 vap->va_ctime.tv_nsec = 0; 1310 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1311 vap->va_filerev = 0; 1312 } 1313 np->n_attrstamp = time_second; 1314 if (vap->va_size != np->n_size) { 1315 if (vap->va_type == VREG) { 1316 if ((lattr_flags & NFS_LATTR_NOSHRINK) && 1317 vap->va_size < np->n_size) { 1318 /* 1319 * We've been told not to shrink the file; 1320 * zero np->n_attrstamp to indicate that 1321 * the attributes are stale. 1322 * 1323 * This occurs primarily due to recursive 1324 * NFS ops that are executed during periods 1325 * where we cannot safely reduce the size of 1326 * the file. 1327 * 1328 * Additionally, write rpcs are broken down 1329 * into buffers and np->n_size is 1330 * pre-extended. Setting NRMODIFIED here 1331 * can result in n_size getting reset to a 1332 * lower value, which is NOT what we want. 1333 * XXX this needs to be cleaned up a lot 1334 * more. 1335 */ 1336 vap->va_size = np->n_size; 1337 np->n_attrstamp = 0; 1338 if ((np->n_flag & NLMODIFIED) == 0) 1339 np->n_flag |= NRMODIFIED; 1340 } else if (np->n_flag & NLMODIFIED) { 1341 /* 1342 * We've modified the file: Use the larger 1343 * of our size, and the server's size. At 1344 * this point the cache coherency is all 1345 * shot to hell. To try to handle multiple 1346 * clients appending to the file at the same 1347 * time mark that the server has changed 1348 * the file if the server's notion of the 1349 * file size is larger then our notion. 1350 * 1351 * XXX this needs work. 1352 */ 1353 if (vap->va_size < np->n_size) { 1354 vap->va_size = np->n_size; 1355 } else { 1356 np->n_size = vap->va_size; 1357 np->n_flag |= NRMODIFIED; 1358 } 1359 } else { 1360 /* 1361 * Someone changed the file's size on the 1362 * server and there are no local changes 1363 * to get in the way, set the size and mark 1364 * it. 1365 */ 1366 np->n_size = vap->va_size; 1367 np->n_flag |= NRMODIFIED; 1368 } 1369 vnode_pager_setsize(vp, np->n_size); 1370 } else { 1371 np->n_size = vap->va_size; 1372 } 1373 } 1374 if (vaper != NULL) { 1375 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1376 if (np->n_flag & NCHG) { 1377 if (np->n_flag & NACC) 1378 vaper->va_atime = np->n_atim; 1379 if (np->n_flag & NUPD) 1380 vaper->va_mtime = np->n_mtim; 1381 } 1382 } 1383 return (0); 1384 } 1385 1386 #ifdef NFS_ACDEBUG 1387 #include <sys/sysctl.h> 1388 SYSCTL_DECL(_vfs_nfs); 1389 static int nfs_acdebug; 1390 SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, ""); 1391 #endif 1392 1393 /* 1394 * Check the time stamp 1395 * If the cache is valid, copy contents to *vap and return 0 1396 * otherwise return an error 1397 */ 1398 int 1399 nfs_getattrcache(struct vnode *vp, struct vattr *vaper) 1400 { 1401 struct nfsnode *np; 1402 struct vattr *vap; 1403 struct nfsmount *nmp; 1404 int timeo; 1405 1406 np = VTONFS(vp); 1407 vap = &np->n_vattr; 1408 nmp = VFSTONFS(vp->v_mount); 1409 1410 /* 1411 * Dynamic timeout based on how recently the file was modified. 1412 * n_mtime is always valid. 1413 */ 1414 timeo = (get_approximate_time_t() - np->n_mtime) / 10; 1415 1416 #ifdef NFS_ACDEBUG 1417 if (nfs_acdebug>1) 1418 printf("nfs_getattrcache: initial timeo = %d\n", timeo); 1419 #endif 1420 1421 if (vap->va_type == VDIR) { 1422 if ((np->n_flag & NLMODIFIED) || timeo < nmp->nm_acdirmin) 1423 timeo = nmp->nm_acdirmin; 1424 else if (timeo > nmp->nm_acdirmax) 1425 timeo = nmp->nm_acdirmax; 1426 } else { 1427 if ((np->n_flag & NLMODIFIED) || timeo < nmp->nm_acregmin) 1428 timeo = nmp->nm_acregmin; 1429 else if (timeo > nmp->nm_acregmax) 1430 timeo = nmp->nm_acregmax; 1431 } 1432 1433 #ifdef NFS_ACDEBUG 1434 if (nfs_acdebug > 2) 1435 printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n", 1436 nmp->nm_acregmin, nmp->nm_acregmax, 1437 nmp->nm_acdirmin, nmp->nm_acdirmax); 1438 1439 if (nfs_acdebug) 1440 printf("nfs_getattrcache: age = %d; final timeo = %d\n", 1441 (int)(time_second - np->n_attrstamp), timeo); 1442 #endif 1443 1444 if (np->n_attrstamp == 0 || (time_second - np->n_attrstamp) >= timeo) { 1445 nfsstats.attrcache_misses++; 1446 return (ENOENT); 1447 } 1448 nfsstats.attrcache_hits++; 1449 1450 /* 1451 * Our attribute cache can be stale due to modifications made on 1452 * this host. XXX this is a bad hack. We need a more deterministic 1453 * means of finding out which np fields are valid verses attr cache 1454 * fields. We really should update the vattr info on the fly when 1455 * making local changes. 1456 */ 1457 if (vap->va_size != np->n_size) { 1458 if (vap->va_type == VREG) { 1459 if (np->n_flag & NLMODIFIED) { 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 } 1467 vnode_pager_setsize(vp, np->n_size); 1468 } else { 1469 np->n_size = vap->va_size; 1470 } 1471 } 1472 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1473 if (np->n_flag & NCHG) { 1474 if (np->n_flag & NACC) 1475 vaper->va_atime = np->n_atim; 1476 if (np->n_flag & NUPD) 1477 vaper->va_mtime = np->n_mtim; 1478 } 1479 return (0); 1480 } 1481 1482 #ifndef NFS_NOSERVER 1483 1484 /* 1485 * Set up nameidata for a lookup() call and do it. 1486 * 1487 * If pubflag is set, this call is done for a lookup operation on the 1488 * public filehandle. In that case we allow crossing mountpoints and 1489 * absolute pathnames. However, the caller is expected to check that 1490 * the lookup result is within the public fs, and deny access if 1491 * it is not. 1492 * 1493 * dirp may be set whether an error is returned or not, and must be 1494 * released by the caller. 1495 * 1496 * On return nd->nl_ncp usually points to the target ncp, which may represent 1497 * a negative hit. 1498 * 1499 * NOTE: the caller must call nlookup_done(nd) unconditionally on return 1500 * to cleanup. 1501 */ 1502 int 1503 nfs_namei(struct nlookupdata *nd, struct ucred *cred, int nameiop, 1504 struct vnode **dvpp, struct vnode **vpp, 1505 fhandle_t *fhp, int len, 1506 struct nfssvc_sock *slp, struct sockaddr *nam, struct mbuf **mdp, 1507 caddr_t *dposp, struct vnode **dirpp, struct thread *td, 1508 int kerbflag, int pubflag) 1509 { 1510 int i, rem; 1511 int flags; 1512 struct mbuf *md; 1513 char *fromcp, *tocp, *cp; 1514 char *namebuf; 1515 struct namecache *ncp; 1516 struct vnode *dp; 1517 int error, rdonly; 1518 1519 namebuf = zalloc(namei_zone); 1520 flags = 0; 1521 *dirpp = NULL; 1522 1523 /* 1524 * Copy the name from the mbuf list to namebuf. 1525 */ 1526 fromcp = *dposp; 1527 tocp = namebuf; 1528 md = *mdp; 1529 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1530 for (i = 0; i < len; i++) { 1531 while (rem == 0) { 1532 md = md->m_next; 1533 if (md == NULL) { 1534 error = EBADRPC; 1535 goto out; 1536 } 1537 fromcp = mtod(md, caddr_t); 1538 rem = md->m_len; 1539 } 1540 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1541 error = EACCES; 1542 goto out; 1543 } 1544 *tocp++ = *fromcp++; 1545 rem--; 1546 } 1547 *tocp = '\0'; 1548 *mdp = md; 1549 *dposp = fromcp; 1550 len = nfsm_rndup(len)-len; 1551 if (len > 0) { 1552 if (rem >= len) 1553 *dposp += len; 1554 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1555 goto out; 1556 } 1557 1558 /* 1559 * Extract and set starting directory. The returned dp is refd 1560 * but not locked. 1561 */ 1562 error = nfsrv_fhtovp(fhp, FALSE, &dp, cred, slp, 1563 nam, &rdonly, kerbflag, pubflag); 1564 if (error) 1565 goto out; 1566 if (dp->v_type != VDIR) { 1567 vrele(dp); 1568 error = ENOTDIR; 1569 goto out; 1570 } 1571 1572 /* 1573 * Set return directory. Reference to dp is implicitly transfered 1574 * to the returned pointer. This must be set before we potentially 1575 * goto out below. 1576 */ 1577 *dirpp = dp; 1578 1579 if (pubflag) { 1580 /* 1581 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1582 * and the 'native path' indicator. 1583 */ 1584 cp = zalloc(namei_zone); 1585 fromcp = namebuf; 1586 tocp = cp; 1587 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1588 switch ((unsigned char)*fromcp) { 1589 case WEBNFS_NATIVE_CHAR: 1590 /* 1591 * 'Native' path for us is the same 1592 * as a path according to the NFS spec, 1593 * just skip the escape char. 1594 */ 1595 fromcp++; 1596 break; 1597 /* 1598 * More may be added in the future, range 0x80-0xff 1599 */ 1600 default: 1601 error = EIO; 1602 zfree(namei_zone, cp); 1603 goto out; 1604 } 1605 } 1606 /* 1607 * Translate the '%' escapes, URL-style. 1608 */ 1609 while (*fromcp != '\0') { 1610 if (*fromcp == WEBNFS_ESC_CHAR) { 1611 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1612 fromcp++; 1613 *tocp++ = HEXSTRTOI(fromcp); 1614 fromcp += 2; 1615 continue; 1616 } else { 1617 error = ENOENT; 1618 zfree(namei_zone, cp); 1619 goto out; 1620 } 1621 } else 1622 *tocp++ = *fromcp++; 1623 } 1624 *tocp = '\0'; 1625 zfree(namei_zone, namebuf); 1626 namebuf = cp; 1627 } 1628 1629 /* 1630 * Setup for search. We need to get a start directory from dp. Note 1631 * that dp is ref'd, but we no longer 'own' the ref (*dirpp owns it). 1632 */ 1633 if (pubflag == 0) { 1634 flags |= NLC_NFS_NOSOFTLINKTRAV; 1635 flags |= NLC_NOCROSSMOUNT; 1636 } 1637 if (rdonly) 1638 flags |= NLC_NFS_RDONLY; 1639 if (nameiop == NAMEI_CREATE || nameiop == NAMEI_RENAME) 1640 flags |= NLC_CREATE; 1641 1642 /* 1643 * We need a starting ncp from the directory vnode dp. dp must not 1644 * be locked. The returned ncp will be refd but not locked. 1645 * 1646 * If no suitable ncp is found we instruct cache_fromdvp() to create 1647 * one. If this fails the directory has probably been removed while 1648 * the target was chdir'd into it and any further lookup will fail. 1649 */ 1650 if ((ncp = cache_fromdvp(dp, cred, 1)) == NULL) { 1651 error = EINVAL; 1652 goto out; 1653 } 1654 nlookup_init_raw(nd, namebuf, UIO_SYSSPACE, flags, cred, ncp); 1655 cache_drop(ncp); 1656 1657 /* 1658 * Ok, do the lookup. 1659 */ 1660 error = nlookup(nd); 1661 1662 /* 1663 * If no error occured return the requested dvpp and vpp. If 1664 * NLC_CREATE was specified nd->nl_ncp may represent a negative 1665 * cache hit in which case we do not attempt to obtain the vp. 1666 */ 1667 if (error == 0) { 1668 ncp = nd->nl_ncp; 1669 if (dvpp) { 1670 if (ncp->nc_parent && 1671 ncp->nc_parent->nc_mount == ncp->nc_mount) { 1672 error = cache_vget(ncp->nc_parent, nd->nl_cred, 1673 LK_EXCLUSIVE, dvpp); 1674 } else { 1675 error = ENXIO; 1676 } 1677 } 1678 if (vpp && ncp->nc_vp) { 1679 error = cache_vget(ncp, nd->nl_cred, LK_EXCLUSIVE, vpp); 1680 } 1681 if (error) { 1682 if (dvpp && *dvpp) { 1683 vput(*dvpp); 1684 *dvpp = NULL; 1685 } 1686 if (vpp && *vpp) { 1687 vput(*vpp); 1688 *vpp = NULL; 1689 } 1690 } 1691 } 1692 1693 /* 1694 * Finish up. 1695 */ 1696 out: 1697 zfree(namei_zone, namebuf); 1698 return (error); 1699 } 1700 1701 /* 1702 * A fiddled version of m_adj() that ensures null fill to a long 1703 * boundary and only trims off the back end 1704 */ 1705 void 1706 nfsm_adj(struct mbuf *mp, int len, int nul) 1707 { 1708 struct mbuf *m; 1709 int count, i; 1710 char *cp; 1711 1712 /* 1713 * Trim from tail. Scan the mbuf chain, 1714 * calculating its length and finding the last mbuf. 1715 * If the adjustment only affects this mbuf, then just 1716 * adjust and return. Otherwise, rescan and truncate 1717 * after the remaining size. 1718 */ 1719 count = 0; 1720 m = mp; 1721 for (;;) { 1722 count += m->m_len; 1723 if (m->m_next == (struct mbuf *)0) 1724 break; 1725 m = m->m_next; 1726 } 1727 if (m->m_len > len) { 1728 m->m_len -= len; 1729 if (nul > 0) { 1730 cp = mtod(m, caddr_t)+m->m_len-nul; 1731 for (i = 0; i < nul; i++) 1732 *cp++ = '\0'; 1733 } 1734 return; 1735 } 1736 count -= len; 1737 if (count < 0) 1738 count = 0; 1739 /* 1740 * Correct length for chain is "count". 1741 * Find the mbuf with last data, adjust its length, 1742 * and toss data from remaining mbufs on chain. 1743 */ 1744 for (m = mp; m; m = m->m_next) { 1745 if (m->m_len >= count) { 1746 m->m_len = count; 1747 if (nul > 0) { 1748 cp = mtod(m, caddr_t)+m->m_len-nul; 1749 for (i = 0; i < nul; i++) 1750 *cp++ = '\0'; 1751 } 1752 break; 1753 } 1754 count -= m->m_len; 1755 } 1756 for (m = m->m_next;m;m = m->m_next) 1757 m->m_len = 0; 1758 } 1759 1760 /* 1761 * Make these functions instead of macros, so that the kernel text size 1762 * doesn't get too big... 1763 */ 1764 void 1765 nfsm_srvwcc(struct nfsrv_descript *nfsd, int before_ret, 1766 struct vattr *before_vap, int after_ret, struct vattr *after_vap, 1767 struct mbuf **mbp, char **bposp) 1768 { 1769 struct mbuf *mb = *mbp, *mb2; 1770 char *bpos = *bposp; 1771 u_int32_t *tl; 1772 1773 /* 1774 * before_ret is 0 if before_vap is valid, non-zero if it isn't. 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, 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 2066 static int nfs_clearcommit_bp(struct buf *bp, void *data __unused); 2067 2068 void 2069 nfs_clearcommit(struct mount *mp) 2070 { 2071 struct vnode *vp, *nvp; 2072 lwkt_tokref ilock; 2073 int s; 2074 2075 lwkt_gettoken(&ilock, &mntvnode_token); 2076 s = splbio(); 2077 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp; vp = nvp) { 2078 nvp = TAILQ_NEXT(vp, v_nmntvnodes); /* ZZZ */ 2079 RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL, 2080 nfs_clearcommit_bp, NULL); 2081 } 2082 splx(s); 2083 lwkt_reltoken(&ilock); 2084 } 2085 2086 static int 2087 nfs_clearcommit_bp(struct buf *bp, void *data __unused) 2088 { 2089 if (BUF_REFCNT(bp) == 0 && 2090 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) 2091 == (B_DELWRI | B_NEEDCOMMIT)) { 2092 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 2093 } 2094 return(0); 2095 } 2096 2097 #ifndef NFS_NOSERVER 2098 /* 2099 * Map errnos to NFS error numbers. For Version 3 also filter out error 2100 * numbers not specified for the associated procedure. 2101 */ 2102 int 2103 nfsrv_errmap(struct nfsrv_descript *nd, int err) 2104 { 2105 short *defaulterrp, *errp; 2106 2107 if (nd->nd_flag & ND_NFSV3) { 2108 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2109 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2110 while (*++errp) { 2111 if (*errp == err) 2112 return (err); 2113 else if (*errp > err) 2114 break; 2115 } 2116 return ((int)*defaulterrp); 2117 } else 2118 return (err & 0xffff); 2119 } 2120 if (err <= ELAST) 2121 return ((int)nfsrv_v2errmap[err - 1]); 2122 return (NFSERR_IO); 2123 } 2124 2125 int 2126 nfsrv_object_create(struct vnode *vp) 2127 { 2128 struct thread *td = curthread; 2129 2130 if (vp == NULL || vp->v_type != VREG) 2131 return (1); 2132 return (vfs_object_create(vp, td)); 2133 } 2134 2135 /* 2136 * Sort the group list in increasing numerical order. 2137 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 2138 * that used to be here.) 2139 */ 2140 void 2141 nfsrvw_sort(gid_t *list, int num) 2142 { 2143 int i, j; 2144 gid_t v; 2145 2146 /* Insertion sort. */ 2147 for (i = 1; i < num; i++) { 2148 v = list[i]; 2149 /* find correct slot for value v, moving others up */ 2150 for (j = i; --j >= 0 && v < list[j];) 2151 list[j + 1] = list[j]; 2152 list[j + 1] = v; 2153 } 2154 } 2155 2156 /* 2157 * copy credentials making sure that the result can be compared with bcmp(). 2158 */ 2159 void 2160 nfsrv_setcred(struct ucred *incred, struct ucred *outcred) 2161 { 2162 int i; 2163 2164 bzero((caddr_t)outcred, sizeof (struct ucred)); 2165 outcred->cr_ref = 1; 2166 outcred->cr_uid = incred->cr_uid; 2167 outcred->cr_ngroups = incred->cr_ngroups; 2168 for (i = 0; i < incred->cr_ngroups; i++) 2169 outcred->cr_groups[i] = incred->cr_groups[i]; 2170 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 2171 } 2172 #endif /* NFS_NOSERVER */ 2173