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 1.48 2008/09/17 21:44:24 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 #include <sys/objcache.h> 63 64 #include <vm/vm.h> 65 #include <vm/vm_object.h> 66 #include <vm/vm_extern.h> 67 #include <vm/vm_zone.h> 68 69 #include <sys/buf2.h> 70 71 #include "rpcv2.h" 72 #include "nfsproto.h" 73 #include "nfs.h" 74 #include "nfsmount.h" 75 #include "nfsnode.h" 76 #include "xdr_subs.h" 77 #include "nfsm_subs.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, 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 nqfhhashhead *nqfhhashtbl; 111 u_long nqfhhash; 112 113 static int nfs_prev_nfssvc_sy_narg; 114 static sy_call_t *nfs_prev_nfssvc_sy_call; 115 116 #ifndef NFS_NOSERVER 117 118 /* 119 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 120 */ 121 int nfsv3_procid[NFS_NPROCS] = { 122 NFSPROC_NULL, 123 NFSPROC_GETATTR, 124 NFSPROC_SETATTR, 125 NFSPROC_NOOP, 126 NFSPROC_LOOKUP, 127 NFSPROC_READLINK, 128 NFSPROC_READ, 129 NFSPROC_NOOP, 130 NFSPROC_WRITE, 131 NFSPROC_CREATE, 132 NFSPROC_REMOVE, 133 NFSPROC_RENAME, 134 NFSPROC_LINK, 135 NFSPROC_SYMLINK, 136 NFSPROC_MKDIR, 137 NFSPROC_RMDIR, 138 NFSPROC_READDIR, 139 NFSPROC_FSSTAT, 140 NFSPROC_NOOP, 141 NFSPROC_NOOP, 142 NFSPROC_NOOP, 143 NFSPROC_NOOP, 144 NFSPROC_NOOP, 145 NFSPROC_NOOP, 146 NFSPROC_NOOP, 147 NFSPROC_NOOP 148 }; 149 150 #endif /* NFS_NOSERVER */ 151 /* 152 * and the reverse mapping from generic to Version 2 procedure numbers 153 */ 154 int nfsv2_procid[NFS_NPROCS] = { 155 NFSV2PROC_NULL, 156 NFSV2PROC_GETATTR, 157 NFSV2PROC_SETATTR, 158 NFSV2PROC_LOOKUP, 159 NFSV2PROC_NOOP, 160 NFSV2PROC_READLINK, 161 NFSV2PROC_READ, 162 NFSV2PROC_WRITE, 163 NFSV2PROC_CREATE, 164 NFSV2PROC_MKDIR, 165 NFSV2PROC_SYMLINK, 166 NFSV2PROC_CREATE, 167 NFSV2PROC_REMOVE, 168 NFSV2PROC_RMDIR, 169 NFSV2PROC_RENAME, 170 NFSV2PROC_LINK, 171 NFSV2PROC_READDIR, 172 NFSV2PROC_NOOP, 173 NFSV2PROC_STATFS, 174 NFSV2PROC_NOOP, 175 NFSV2PROC_NOOP, 176 NFSV2PROC_NOOP, 177 NFSV2PROC_NOOP, 178 NFSV2PROC_NOOP, 179 NFSV2PROC_NOOP, 180 NFSV2PROC_NOOP, 181 }; 182 183 #ifndef NFS_NOSERVER 184 /* 185 * Maps errno values to nfs error numbers. 186 * Use NFSERR_IO as the catch all for ones not specifically defined in 187 * RFC 1094. 188 */ 189 static u_char nfsrv_v2errmap[ELAST] = { 190 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 191 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 192 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 193 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 194 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 195 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 196 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 197 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 198 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 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_NAMETOL, NFSERR_IO, NFSERR_IO, 203 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 204 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 205 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 206 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 207 NFSERR_IO /* << Last is 86 */ 208 }; 209 210 /* 211 * Maps errno values to nfs error numbers. 212 * Although it is not obvious whether or not NFS clients really care if 213 * a returned error value is in the specified list for the procedure, the 214 * safest thing to do is filter them appropriately. For Version 2, the 215 * X/Open XNFS document is the only specification that defines error values 216 * for each RPC (The RFC simply lists all possible error values for all RPCs), 217 * so I have decided to not do this for Version 2. 218 * The first entry is the default error return and the rest are the valid 219 * errors for that RPC in increasing numeric order. 220 */ 221 static short nfsv3err_null[] = { 222 0, 223 0, 224 }; 225 226 static short nfsv3err_getattr[] = { 227 NFSERR_IO, 228 NFSERR_IO, 229 NFSERR_STALE, 230 NFSERR_BADHANDLE, 231 NFSERR_SERVERFAULT, 232 0, 233 }; 234 235 static short nfsv3err_setattr[] = { 236 NFSERR_IO, 237 NFSERR_PERM, 238 NFSERR_IO, 239 NFSERR_ACCES, 240 NFSERR_INVAL, 241 NFSERR_NOSPC, 242 NFSERR_ROFS, 243 NFSERR_DQUOT, 244 NFSERR_STALE, 245 NFSERR_BADHANDLE, 246 NFSERR_NOT_SYNC, 247 NFSERR_SERVERFAULT, 248 0, 249 }; 250 251 static short nfsv3err_lookup[] = { 252 NFSERR_IO, 253 NFSERR_NOENT, 254 NFSERR_IO, 255 NFSERR_ACCES, 256 NFSERR_NOTDIR, 257 NFSERR_NAMETOL, 258 NFSERR_STALE, 259 NFSERR_BADHANDLE, 260 NFSERR_SERVERFAULT, 261 0, 262 }; 263 264 static short nfsv3err_access[] = { 265 NFSERR_IO, 266 NFSERR_IO, 267 NFSERR_STALE, 268 NFSERR_BADHANDLE, 269 NFSERR_SERVERFAULT, 270 0, 271 }; 272 273 static short nfsv3err_readlink[] = { 274 NFSERR_IO, 275 NFSERR_IO, 276 NFSERR_ACCES, 277 NFSERR_INVAL, 278 NFSERR_STALE, 279 NFSERR_BADHANDLE, 280 NFSERR_NOTSUPP, 281 NFSERR_SERVERFAULT, 282 0, 283 }; 284 285 static short nfsv3err_read[] = { 286 NFSERR_IO, 287 NFSERR_IO, 288 NFSERR_NXIO, 289 NFSERR_ACCES, 290 NFSERR_INVAL, 291 NFSERR_STALE, 292 NFSERR_BADHANDLE, 293 NFSERR_SERVERFAULT, 294 0, 295 }; 296 297 static short nfsv3err_write[] = { 298 NFSERR_IO, 299 NFSERR_IO, 300 NFSERR_ACCES, 301 NFSERR_INVAL, 302 NFSERR_FBIG, 303 NFSERR_NOSPC, 304 NFSERR_ROFS, 305 NFSERR_DQUOT, 306 NFSERR_STALE, 307 NFSERR_BADHANDLE, 308 NFSERR_SERVERFAULT, 309 0, 310 }; 311 312 static short nfsv3err_create[] = { 313 NFSERR_IO, 314 NFSERR_IO, 315 NFSERR_ACCES, 316 NFSERR_EXIST, 317 NFSERR_NOTDIR, 318 NFSERR_NOSPC, 319 NFSERR_ROFS, 320 NFSERR_NAMETOL, 321 NFSERR_DQUOT, 322 NFSERR_STALE, 323 NFSERR_BADHANDLE, 324 NFSERR_NOTSUPP, 325 NFSERR_SERVERFAULT, 326 0, 327 }; 328 329 static short nfsv3err_mkdir[] = { 330 NFSERR_IO, 331 NFSERR_IO, 332 NFSERR_ACCES, 333 NFSERR_EXIST, 334 NFSERR_NOTDIR, 335 NFSERR_NOSPC, 336 NFSERR_ROFS, 337 NFSERR_NAMETOL, 338 NFSERR_DQUOT, 339 NFSERR_STALE, 340 NFSERR_BADHANDLE, 341 NFSERR_NOTSUPP, 342 NFSERR_SERVERFAULT, 343 0, 344 }; 345 346 static short nfsv3err_symlink[] = { 347 NFSERR_IO, 348 NFSERR_IO, 349 NFSERR_ACCES, 350 NFSERR_EXIST, 351 NFSERR_NOTDIR, 352 NFSERR_NOSPC, 353 NFSERR_ROFS, 354 NFSERR_NAMETOL, 355 NFSERR_DQUOT, 356 NFSERR_STALE, 357 NFSERR_BADHANDLE, 358 NFSERR_NOTSUPP, 359 NFSERR_SERVERFAULT, 360 0, 361 }; 362 363 static short nfsv3err_mknod[] = { 364 NFSERR_IO, 365 NFSERR_IO, 366 NFSERR_ACCES, 367 NFSERR_EXIST, 368 NFSERR_NOTDIR, 369 NFSERR_NOSPC, 370 NFSERR_ROFS, 371 NFSERR_NAMETOL, 372 NFSERR_DQUOT, 373 NFSERR_STALE, 374 NFSERR_BADHANDLE, 375 NFSERR_NOTSUPP, 376 NFSERR_SERVERFAULT, 377 NFSERR_BADTYPE, 378 0, 379 }; 380 381 static short nfsv3err_remove[] = { 382 NFSERR_IO, 383 NFSERR_NOENT, 384 NFSERR_IO, 385 NFSERR_ACCES, 386 NFSERR_NOTDIR, 387 NFSERR_ROFS, 388 NFSERR_NAMETOL, 389 NFSERR_STALE, 390 NFSERR_BADHANDLE, 391 NFSERR_SERVERFAULT, 392 0, 393 }; 394 395 static short nfsv3err_rmdir[] = { 396 NFSERR_IO, 397 NFSERR_NOENT, 398 NFSERR_IO, 399 NFSERR_ACCES, 400 NFSERR_EXIST, 401 NFSERR_NOTDIR, 402 NFSERR_INVAL, 403 NFSERR_ROFS, 404 NFSERR_NAMETOL, 405 NFSERR_NOTEMPTY, 406 NFSERR_STALE, 407 NFSERR_BADHANDLE, 408 NFSERR_NOTSUPP, 409 NFSERR_SERVERFAULT, 410 0, 411 }; 412 413 static short nfsv3err_rename[] = { 414 NFSERR_IO, 415 NFSERR_NOENT, 416 NFSERR_IO, 417 NFSERR_ACCES, 418 NFSERR_EXIST, 419 NFSERR_XDEV, 420 NFSERR_NOTDIR, 421 NFSERR_ISDIR, 422 NFSERR_INVAL, 423 NFSERR_NOSPC, 424 NFSERR_ROFS, 425 NFSERR_MLINK, 426 NFSERR_NAMETOL, 427 NFSERR_NOTEMPTY, 428 NFSERR_DQUOT, 429 NFSERR_STALE, 430 NFSERR_BADHANDLE, 431 NFSERR_NOTSUPP, 432 NFSERR_SERVERFAULT, 433 0, 434 }; 435 436 static short nfsv3err_link[] = { 437 NFSERR_IO, 438 NFSERR_IO, 439 NFSERR_ACCES, 440 NFSERR_EXIST, 441 NFSERR_XDEV, 442 NFSERR_NOTDIR, 443 NFSERR_INVAL, 444 NFSERR_NOSPC, 445 NFSERR_ROFS, 446 NFSERR_MLINK, 447 NFSERR_NAMETOL, 448 NFSERR_DQUOT, 449 NFSERR_STALE, 450 NFSERR_BADHANDLE, 451 NFSERR_NOTSUPP, 452 NFSERR_SERVERFAULT, 453 0, 454 }; 455 456 static short nfsv3err_readdir[] = { 457 NFSERR_IO, 458 NFSERR_IO, 459 NFSERR_ACCES, 460 NFSERR_NOTDIR, 461 NFSERR_STALE, 462 NFSERR_BADHANDLE, 463 NFSERR_BAD_COOKIE, 464 NFSERR_TOOSMALL, 465 NFSERR_SERVERFAULT, 466 0, 467 }; 468 469 static short nfsv3err_readdirplus[] = { 470 NFSERR_IO, 471 NFSERR_IO, 472 NFSERR_ACCES, 473 NFSERR_NOTDIR, 474 NFSERR_STALE, 475 NFSERR_BADHANDLE, 476 NFSERR_BAD_COOKIE, 477 NFSERR_NOTSUPP, 478 NFSERR_TOOSMALL, 479 NFSERR_SERVERFAULT, 480 0, 481 }; 482 483 static short nfsv3err_fsstat[] = { 484 NFSERR_IO, 485 NFSERR_IO, 486 NFSERR_STALE, 487 NFSERR_BADHANDLE, 488 NFSERR_SERVERFAULT, 489 0, 490 }; 491 492 static short nfsv3err_fsinfo[] = { 493 NFSERR_STALE, 494 NFSERR_STALE, 495 NFSERR_BADHANDLE, 496 NFSERR_SERVERFAULT, 497 0, 498 }; 499 500 static short nfsv3err_pathconf[] = { 501 NFSERR_STALE, 502 NFSERR_STALE, 503 NFSERR_BADHANDLE, 504 NFSERR_SERVERFAULT, 505 0, 506 }; 507 508 static short nfsv3err_commit[] = { 509 NFSERR_IO, 510 NFSERR_IO, 511 NFSERR_STALE, 512 NFSERR_BADHANDLE, 513 NFSERR_SERVERFAULT, 514 0, 515 }; 516 517 static short *nfsrv_v3errmap[] = { 518 nfsv3err_null, 519 nfsv3err_getattr, 520 nfsv3err_setattr, 521 nfsv3err_lookup, 522 nfsv3err_access, 523 nfsv3err_readlink, 524 nfsv3err_read, 525 nfsv3err_write, 526 nfsv3err_create, 527 nfsv3err_mkdir, 528 nfsv3err_symlink, 529 nfsv3err_mknod, 530 nfsv3err_remove, 531 nfsv3err_rmdir, 532 nfsv3err_rename, 533 nfsv3err_link, 534 nfsv3err_readdir, 535 nfsv3err_readdirplus, 536 nfsv3err_fsstat, 537 nfsv3err_fsinfo, 538 nfsv3err_pathconf, 539 nfsv3err_commit, 540 }; 541 542 #endif /* NFS_NOSERVER */ 543 544 extern struct nfsrtt nfsrtt; 545 extern struct nfsstats nfsstats; 546 extern nfstype nfsv2_type[9]; 547 extern nfstype nfsv3_type[9]; 548 extern struct nfsnodehashhead *nfsnodehashtbl; 549 extern u_long nfsnodehash; 550 551 struct nfssvc_args; 552 extern int sys_nfssvc(struct proc *, struct nfssvc_args *, int *); 553 554 LIST_HEAD(nfsnodehashhead, nfsnode); 555 556 /* 557 * This needs to return a monotonically increasing or close to monotonically 558 * increasing result, otherwise the write gathering queues won't work 559 * properly. 560 */ 561 u_quad_t 562 nfs_curusec(void) 563 { 564 struct timeval tv; 565 566 getmicrouptime(&tv); 567 return ((u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec); 568 } 569 570 /* 571 * Create the header for an rpc request packet 572 * The hsiz is the size of the rest of the nfs request header. 573 * (just used to decide if a cluster is a good idea) 574 */ 575 struct mbuf * 576 nfsm_reqh(struct vnode *vp, u_long procid, int hsiz, caddr_t *bposp) 577 { 578 struct mbuf *mb; 579 caddr_t bpos; 580 581 mb = m_getl(hsiz, MB_WAIT, MT_DATA, 0, NULL); 582 mb->m_len = 0; 583 bpos = mtod(mb, caddr_t); 584 585 /* Finally, return values */ 586 *bposp = bpos; 587 return (mb); 588 } 589 590 /* 591 * Build the RPC header and fill in the authorization info. 592 * The authorization string argument is only used when the credentials 593 * come from outside of the kernel. 594 * Returns the head of the mbuf list. 595 */ 596 struct mbuf * 597 nfsm_rpchead(struct ucred *cr, int nmflag, int procid, int auth_type, 598 int auth_len, char *auth_str, int verf_len, char *verf_str, 599 struct mbuf *mrest, int mrest_len, struct mbuf **mbp, 600 u_int32_t *xidp) 601 { 602 struct mbuf *mb; 603 u_int32_t *tl; 604 caddr_t bpos; 605 int i; 606 struct mbuf *mreq, *mb2; 607 int siz, grpsiz, authsiz, dsiz; 608 609 authsiz = nfsm_rndup(auth_len); 610 dsiz = authsiz + 10 * NFSX_UNSIGNED; 611 mb = m_getl(dsiz, MB_WAIT, MT_DATA, M_PKTHDR, NULL); 612 if (dsiz < MINCLSIZE) { 613 if (dsiz < MHLEN) 614 MH_ALIGN(mb, dsiz); 615 else 616 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 617 } 618 mb->m_len = mb->m_pkthdr.len = 0; 619 mreq = mb; 620 bpos = mtod(mb, caddr_t); 621 622 /* 623 * First the RPC header. 624 */ 625 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 626 627 /* Get a pretty random xid to start with */ 628 if (!nfs_xid) 629 nfs_xid = krandom(); 630 /* 631 * Skip zero xid if it should ever happen. 632 */ 633 if (++nfs_xid == 0) 634 nfs_xid++; 635 636 *tl++ = *xidp = txdr_unsigned(nfs_xid); 637 *tl++ = rpc_call; 638 *tl++ = rpc_vers; 639 *tl++ = txdr_unsigned(NFS_PROG); 640 if (nmflag & NFSMNT_NFSV3) 641 *tl++ = txdr_unsigned(NFS_VER3); 642 else 643 *tl++ = txdr_unsigned(NFS_VER2); 644 if (nmflag & NFSMNT_NFSV3) 645 *tl++ = txdr_unsigned(procid); 646 else 647 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 648 649 /* 650 * And then the authorization cred. 651 */ 652 *tl++ = txdr_unsigned(auth_type); 653 *tl = txdr_unsigned(authsiz); 654 switch (auth_type) { 655 case RPCAUTH_UNIX: 656 nfsm_build(tl, u_int32_t *, auth_len); 657 *tl++ = 0; /* stamp ?? */ 658 *tl++ = 0; /* NULL hostname */ 659 *tl++ = txdr_unsigned(cr->cr_uid); 660 *tl++ = txdr_unsigned(cr->cr_groups[0]); 661 grpsiz = (auth_len >> 2) - 5; 662 *tl++ = txdr_unsigned(grpsiz); 663 for (i = 1; i <= grpsiz; i++) 664 *tl++ = txdr_unsigned(cr->cr_groups[i]); 665 break; 666 case RPCAUTH_KERB4: 667 siz = auth_len; 668 while (siz > 0) { 669 if (M_TRAILINGSPACE(mb) == 0) { 670 mb2 = m_getl(siz, MB_WAIT, MT_DATA, 0, NULL); 671 mb2->m_len = 0; 672 mb->m_next = mb2; 673 mb = mb2; 674 bpos = mtod(mb, caddr_t); 675 } 676 i = min(siz, M_TRAILINGSPACE(mb)); 677 bcopy(auth_str, bpos, i); 678 mb->m_len += i; 679 auth_str += i; 680 bpos += i; 681 siz -= i; 682 } 683 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 684 for (i = 0; i < siz; i++) 685 *bpos++ = '\0'; 686 mb->m_len += siz; 687 } 688 break; 689 }; 690 691 /* 692 * And the verifier... 693 */ 694 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 695 if (verf_str) { 696 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 697 *tl = txdr_unsigned(verf_len); 698 siz = verf_len; 699 while (siz > 0) { 700 if (M_TRAILINGSPACE(mb) == 0) { 701 mb2 = m_getl(siz, MB_WAIT, MT_DATA, 0, NULL); 702 mb2->m_len = 0; 703 mb->m_next = mb2; 704 mb = mb2; 705 bpos = mtod(mb, caddr_t); 706 } 707 i = min(siz, M_TRAILINGSPACE(mb)); 708 bcopy(verf_str, bpos, i); 709 mb->m_len += i; 710 verf_str += i; 711 bpos += i; 712 siz -= i; 713 } 714 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 715 for (i = 0; i < siz; i++) 716 *bpos++ = '\0'; 717 mb->m_len += siz; 718 } 719 } else { 720 *tl++ = txdr_unsigned(RPCAUTH_NULL); 721 *tl = 0; 722 } 723 mb->m_next = mrest; 724 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 725 mreq->m_pkthdr.rcvif = NULL; 726 *mbp = mb; 727 return (mreq); 728 } 729 730 /* 731 * copies mbuf chain to the uio scatter/gather list 732 */ 733 int 734 nfsm_mbuftouio(struct mbuf **mrep, struct uio *uiop, int siz, caddr_t *dpos) 735 { 736 char *mbufcp, *uiocp; 737 int xfer, left, len; 738 struct mbuf *mp; 739 long uiosiz, rem; 740 int error = 0; 741 742 mp = *mrep; 743 mbufcp = *dpos; 744 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 745 rem = nfsm_rndup(siz)-siz; 746 while (siz > 0) { 747 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 748 return (EFBIG); 749 left = uiop->uio_iov->iov_len; 750 uiocp = uiop->uio_iov->iov_base; 751 if (left > siz) 752 left = siz; 753 uiosiz = left; 754 while (left > 0) { 755 while (len == 0) { 756 mp = mp->m_next; 757 if (mp == NULL) 758 return (EBADRPC); 759 mbufcp = mtod(mp, caddr_t); 760 len = mp->m_len; 761 } 762 xfer = (left > len) ? len : left; 763 #ifdef notdef 764 /* Not Yet.. */ 765 if (uiop->uio_iov->iov_op != NULL) 766 (*(uiop->uio_iov->iov_op)) 767 (mbufcp, uiocp, xfer); 768 else 769 #endif 770 if (uiop->uio_segflg == UIO_SYSSPACE) 771 bcopy(mbufcp, uiocp, xfer); 772 else 773 copyout(mbufcp, uiocp, xfer); 774 left -= xfer; 775 len -= xfer; 776 mbufcp += xfer; 777 uiocp += xfer; 778 uiop->uio_offset += xfer; 779 uiop->uio_resid -= xfer; 780 } 781 if (uiop->uio_iov->iov_len <= siz) { 782 uiop->uio_iovcnt--; 783 uiop->uio_iov++; 784 } else { 785 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + uiosiz; 786 uiop->uio_iov->iov_len -= uiosiz; 787 } 788 siz -= uiosiz; 789 } 790 *dpos = mbufcp; 791 *mrep = mp; 792 if (rem > 0) { 793 if (len < rem) 794 error = nfs_adv(mrep, dpos, rem, len); 795 else 796 *dpos += rem; 797 } 798 return (error); 799 } 800 801 /* 802 * copies a uio scatter/gather list to an mbuf chain. 803 * NOTE: can ony handle iovcnt == 1 804 */ 805 int 806 nfsm_uiotombuf(struct uio *uiop, struct mbuf **mq, int siz, caddr_t *bpos) 807 { 808 char *uiocp; 809 struct mbuf *mp, *mp2; 810 int xfer, left, mlen; 811 int uiosiz, rem; 812 boolean_t getcluster; 813 char *cp; 814 815 #ifdef DIAGNOSTIC 816 if (uiop->uio_iovcnt != 1) 817 panic("nfsm_uiotombuf: iovcnt != 1"); 818 #endif 819 820 if (siz >= MINCLSIZE) 821 getcluster = TRUE; 822 else 823 getcluster = FALSE; 824 rem = nfsm_rndup(siz) - siz; 825 mp = mp2 = *mq; 826 while (siz > 0) { 827 left = uiop->uio_iov->iov_len; 828 uiocp = uiop->uio_iov->iov_base; 829 if (left > siz) 830 left = siz; 831 uiosiz = left; 832 while (left > 0) { 833 mlen = M_TRAILINGSPACE(mp); 834 if (mlen == 0) { 835 if (getcluster) 836 mp = m_getcl(MB_WAIT, MT_DATA, 0); 837 else 838 mp = m_get(MB_WAIT, MT_DATA); 839 mp->m_len = 0; 840 mp2->m_next = mp; 841 mp2 = mp; 842 mlen = M_TRAILINGSPACE(mp); 843 } 844 xfer = (left > mlen) ? mlen : left; 845 #ifdef notdef 846 /* Not Yet.. */ 847 if (uiop->uio_iov->iov_op != NULL) 848 (*(uiop->uio_iov->iov_op)) 849 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 850 else 851 #endif 852 if (uiop->uio_segflg == UIO_SYSSPACE) 853 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 854 else 855 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 856 mp->m_len += xfer; 857 left -= xfer; 858 uiocp += xfer; 859 uiop->uio_offset += xfer; 860 uiop->uio_resid -= xfer; 861 } 862 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + uiosiz; 863 uiop->uio_iov->iov_len -= uiosiz; 864 siz -= uiosiz; 865 } 866 if (rem > 0) { 867 if (rem > M_TRAILINGSPACE(mp)) { 868 MGET(mp, MB_WAIT, MT_DATA); 869 mp->m_len = 0; 870 mp2->m_next = mp; 871 } 872 cp = mtod(mp, caddr_t)+mp->m_len; 873 for (left = 0; left < rem; left++) 874 *cp++ = '\0'; 875 mp->m_len += rem; 876 *bpos = cp; 877 } else 878 *bpos = mtod(mp, caddr_t)+mp->m_len; 879 *mq = mp; 880 return (0); 881 } 882 883 /* 884 * Help break down an mbuf chain by setting the first siz bytes contiguous 885 * pointed to by returned val. 886 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 887 * cases. (The macros use the vars. dpos and dpos2) 888 */ 889 int 890 nfsm_disct(struct mbuf **mdp, caddr_t *dposp, int siz, int left, caddr_t *cp2) 891 { 892 struct mbuf *mp, *mp2; 893 int siz2, xfer; 894 caddr_t p; 895 896 mp = *mdp; 897 while (left == 0) { 898 *mdp = mp = mp->m_next; 899 if (mp == NULL) 900 return (EBADRPC); 901 left = mp->m_len; 902 *dposp = mtod(mp, caddr_t); 903 } 904 if (left >= siz) { 905 *cp2 = *dposp; 906 *dposp += siz; 907 } else if (mp->m_next == NULL) { 908 return (EBADRPC); 909 } else if (siz > MHLEN) { 910 panic("nfs S too big"); 911 } else { 912 MGET(mp2, MB_WAIT, MT_DATA); 913 mp2->m_next = mp->m_next; 914 mp->m_next = mp2; 915 mp->m_len -= left; 916 mp = mp2; 917 *cp2 = p = mtod(mp, caddr_t); 918 bcopy(*dposp, p, left); /* Copy what was left */ 919 siz2 = siz-left; 920 p += left; 921 mp2 = mp->m_next; 922 /* Loop around copying up the siz2 bytes */ 923 while (siz2 > 0) { 924 if (mp2 == NULL) 925 return (EBADRPC); 926 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 927 if (xfer > 0) { 928 bcopy(mtod(mp2, caddr_t), p, xfer); 929 NFSMADV(mp2, xfer); 930 mp2->m_len -= xfer; 931 p += xfer; 932 siz2 -= xfer; 933 } 934 if (siz2 > 0) 935 mp2 = mp2->m_next; 936 } 937 mp->m_len = siz; 938 *mdp = mp2; 939 *dposp = mtod(mp2, caddr_t); 940 } 941 return (0); 942 } 943 944 /* 945 * Advance the position in the mbuf chain. 946 */ 947 int 948 nfs_adv(struct mbuf **mdp, caddr_t *dposp, int offs, int left) 949 { 950 struct mbuf *m; 951 int s; 952 953 m = *mdp; 954 s = left; 955 while (s < offs) { 956 offs -= s; 957 m = m->m_next; 958 if (m == NULL) 959 return (EBADRPC); 960 s = m->m_len; 961 } 962 *mdp = m; 963 *dposp = mtod(m, caddr_t)+offs; 964 return (0); 965 } 966 967 /* 968 * Copy a string into mbufs for the hard cases... 969 */ 970 int 971 nfsm_strtmbuf(struct mbuf **mb, char **bpos, const char *cp, long siz) 972 { 973 struct mbuf *m1 = NULL, *m2; 974 long left, xfer, len, tlen; 975 u_int32_t *tl; 976 int putsize; 977 978 putsize = 1; 979 m2 = *mb; 980 left = M_TRAILINGSPACE(m2); 981 if (left > 0) { 982 tl = ((u_int32_t *)(*bpos)); 983 *tl++ = txdr_unsigned(siz); 984 putsize = 0; 985 left -= NFSX_UNSIGNED; 986 m2->m_len += NFSX_UNSIGNED; 987 if (left > 0) { 988 bcopy(cp, (caddr_t) tl, left); 989 siz -= left; 990 cp += left; 991 m2->m_len += left; 992 left = 0; 993 } 994 } 995 /* Loop around adding mbufs */ 996 while (siz > 0) { 997 int msize; 998 999 m1 = m_getl(siz, MB_WAIT, MT_DATA, 0, &msize); 1000 m1->m_len = msize; 1001 m2->m_next = m1; 1002 m2 = m1; 1003 tl = mtod(m1, u_int32_t *); 1004 tlen = 0; 1005 if (putsize) { 1006 *tl++ = txdr_unsigned(siz); 1007 m1->m_len -= NFSX_UNSIGNED; 1008 tlen = NFSX_UNSIGNED; 1009 putsize = 0; 1010 } 1011 if (siz < m1->m_len) { 1012 len = nfsm_rndup(siz); 1013 xfer = siz; 1014 if (xfer < len) 1015 *(tl+(xfer>>2)) = 0; 1016 } else { 1017 xfer = len = m1->m_len; 1018 } 1019 bcopy(cp, (caddr_t) tl, xfer); 1020 m1->m_len = len+tlen; 1021 siz -= xfer; 1022 cp += xfer; 1023 } 1024 *mb = m1; 1025 *bpos = mtod(m1, caddr_t)+m1->m_len; 1026 return (0); 1027 } 1028 1029 /* 1030 * Called once to initialize data structures... 1031 */ 1032 int 1033 nfs_init(struct vfsconf *vfsp) 1034 { 1035 int i; 1036 1037 callout_init(&nfs_timer_handle); 1038 nfsmount_zone = zinit("NFSMOUNT", sizeof(struct nfsmount), 0, 0, 1); 1039 1040 nfs_mount_type = vfsp->vfc_typenum; 1041 nfsrtt.pos = 0; 1042 rpc_vers = txdr_unsigned(RPC_VER2); 1043 rpc_call = txdr_unsigned(RPC_CALL); 1044 rpc_reply = txdr_unsigned(RPC_REPLY); 1045 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1046 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1047 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1048 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1049 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1050 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1051 nfs_prog = txdr_unsigned(NFS_PROG); 1052 nfs_true = txdr_unsigned(TRUE); 1053 nfs_false = txdr_unsigned(FALSE); 1054 nfs_xdrneg1 = txdr_unsigned(-1); 1055 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1056 if (nfs_ticks < 1) 1057 nfs_ticks = 1; 1058 /* Ensure async daemons disabled */ 1059 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1060 nfs_iodwant[i] = NULL; 1061 nfs_iodmount[i] = NULL; 1062 } 1063 nfs_nhinit(); /* Init the nfsnode table */ 1064 #ifndef NFS_NOSERVER 1065 nfsrv_init(0); /* Init server data structures */ 1066 nfsrv_initcache(); /* Init the server request cache */ 1067 #endif 1068 1069 /* 1070 * Initialize reply list and start timer 1071 */ 1072 TAILQ_INIT(&nfs_reqq); 1073 1074 nfs_timer(0); 1075 1076 nfs_prev_nfssvc_sy_narg = sysent[SYS_nfssvc].sy_narg; 1077 sysent[SYS_nfssvc].sy_narg = 2; 1078 nfs_prev_nfssvc_sy_call = sysent[SYS_nfssvc].sy_call; 1079 sysent[SYS_nfssvc].sy_call = (sy_call_t *)sys_nfssvc; 1080 1081 nfs_pbuf_freecnt = nswbuf / 2 + 1; 1082 1083 return (0); 1084 } 1085 1086 int 1087 nfs_uninit(struct vfsconf *vfsp) 1088 { 1089 callout_stop(&nfs_timer_handle); 1090 nfs_mount_type = -1; 1091 sysent[SYS_nfssvc].sy_narg = nfs_prev_nfssvc_sy_narg; 1092 sysent[SYS_nfssvc].sy_call = nfs_prev_nfssvc_sy_call; 1093 return (0); 1094 } 1095 1096 /* 1097 * Attribute cache routines. 1098 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1099 * that are on the mbuf list 1100 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1101 * error otherwise 1102 */ 1103 1104 /* 1105 * Load the attribute cache (that lives in the nfsnode entry) with 1106 * the values on the mbuf list. Load *vaper with the attributes. vaper 1107 * may be NULL. 1108 * 1109 * As a side effect n_mtime, which we use to determine if the file was 1110 * modified by some other host, is set to the attribute timestamp and 1111 * NRMODIFIED is set if the two values differ. 1112 * 1113 * WARNING: the mtime loaded into vaper does not necessarily represent 1114 * n_mtime or n_attr.mtime due to NACC and NUPD. 1115 */ 1116 int 1117 nfs_loadattrcache(struct vnode **vpp, struct mbuf **mdp, caddr_t *dposp, 1118 struct vattr *vaper, int lattr_flags) 1119 { 1120 struct vnode *vp = *vpp; 1121 struct vattr *vap; 1122 struct nfs_fattr *fp; 1123 struct nfsnode *np; 1124 int32_t t1; 1125 caddr_t cp2; 1126 int error = 0; 1127 int rmajor, rminor; 1128 udev_t rdev; 1129 struct mbuf *md; 1130 enum vtype vtyp; 1131 u_short vmode; 1132 struct timespec mtime; 1133 int v3 = NFS_ISV3(vp); 1134 1135 md = *mdp; 1136 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1137 if ((error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) != 0) 1138 return (error); 1139 fp = (struct nfs_fattr *)cp2; 1140 if (v3) { 1141 vtyp = nfsv3tov_type(fp->fa_type); 1142 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1143 rmajor = (int)fxdr_unsigned(int, fp->fa3_rdev.specdata1); 1144 rminor = (int)fxdr_unsigned(int, fp->fa3_rdev.specdata2); 1145 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1146 } else { 1147 vtyp = nfsv2tov_type(fp->fa_type); 1148 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1149 /* 1150 * XXX 1151 * 1152 * The duplicate information returned in fa_type and fa_mode 1153 * is an ambiguity in the NFS version 2 protocol. 1154 * 1155 * VREG should be taken literally as a regular file. If a 1156 * server intents to return some type information differently 1157 * in the upper bits of the mode field (e.g. for sockets, or 1158 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1159 * leave the examination of the mode bits even in the VREG 1160 * case to avoid breakage for bogus servers, but we make sure 1161 * that there are actually type bits set in the upper part of 1162 * fa_mode (and failing that, trust the va_type field). 1163 * 1164 * NFSv3 cleared the issue, and requires fa_mode to not 1165 * contain any type information (while also introduing sockets 1166 * and FIFOs for fa_type). 1167 */ 1168 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1169 vtyp = IFTOVT(vmode); 1170 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1171 rmajor = umajor(rdev); 1172 rminor = uminor(rdev); 1173 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1174 1175 /* 1176 * Really ugly NFSv2 kludge. 1177 */ 1178 if (vtyp == VCHR && rdev == (udev_t)0xffffffff) 1179 vtyp = VFIFO; 1180 } 1181 1182 /* 1183 * If v_type == VNON it is a new node, so fill in the v_type, 1184 * n_mtime fields. Check to see if it represents a special 1185 * device, and if so, check for a possible alias. Once the 1186 * correct vnode has been obtained, fill in the rest of the 1187 * information. 1188 */ 1189 np = VTONFS(vp); 1190 if (vp->v_type != vtyp) { 1191 nfs_setvtype(vp, vtyp); 1192 if (vp->v_type == VFIFO) { 1193 vp->v_ops = &vp->v_mount->mnt_vn_fifo_ops; 1194 } else if (vp->v_type == VCHR || vp->v_type == VBLK) { 1195 vp->v_ops = &vp->v_mount->mnt_vn_spec_ops; 1196 addaliasu(vp, rmajor, rminor); 1197 } else { 1198 vp->v_ops = &vp->v_mount->mnt_vn_use_ops; 1199 } 1200 np->n_mtime = mtime.tv_sec; 1201 } else if (np->n_mtime != mtime.tv_sec) { 1202 /* 1203 * If we haven't modified the file locally and the server 1204 * timestamp does not match, then the server probably 1205 * modified the file. We must flag this condition so 1206 * the proper syncnronization can be done. We do not 1207 * try to synchronize the state here because that 1208 * could lead to an endless recursion. 1209 * 1210 * XXX loadattrcache can be set during the reply to a write, 1211 * before the write timestamp is properly processed. To 1212 * avoid unconditionally setting the rmodified bit (which 1213 * has the effect of flushing the cache), we only do this 1214 * check if the lmodified bit is not set. 1215 */ 1216 np->n_mtime = mtime.tv_sec; 1217 if ((lattr_flags & NFS_LATTR_NOMTIMECHECK) == 0) 1218 np->n_flag |= NRMODIFIED; 1219 } 1220 vap = &np->n_vattr; 1221 vap->va_type = vtyp; 1222 vap->va_mode = (vmode & 07777); 1223 vap->va_rmajor = rmajor; 1224 vap->va_rminor = rminor; 1225 vap->va_mtime = mtime; 1226 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1227 if (v3) { 1228 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1229 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1230 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1231 vap->va_size = fxdr_hyper(&fp->fa3_size); 1232 vap->va_blocksize = NFS_FABLKSIZE; 1233 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 1234 vap->va_fileid = fxdr_hyper(&fp->fa3_fileid); 1235 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1236 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1237 vap->va_flags = 0; 1238 vap->va_filerev = 0; 1239 } else { 1240 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1241 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1242 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1243 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1244 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); 1245 vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) 1246 * NFS_FABLKSIZE; 1247 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1248 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1249 vap->va_flags = 0; 1250 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1251 fp->fa2_ctime.nfsv2_sec); 1252 vap->va_ctime.tv_nsec = 0; 1253 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1254 vap->va_filerev = 0; 1255 } 1256 np->n_attrstamp = time_second; 1257 if (vap->va_size != np->n_size) { 1258 if (vap->va_type == VREG) { 1259 if ((lattr_flags & NFS_LATTR_NOSHRINK) && 1260 vap->va_size < np->n_size) { 1261 /* 1262 * We've been told not to shrink the file; 1263 * zero np->n_attrstamp to indicate that 1264 * the attributes are stale. 1265 * 1266 * This occurs primarily due to recursive 1267 * NFS ops that are executed during periods 1268 * where we cannot safely reduce the size of 1269 * the file. 1270 * 1271 * Additionally, write rpcs are broken down 1272 * into buffers and np->n_size is 1273 * pre-extended. Setting NRMODIFIED here 1274 * can result in n_size getting reset to a 1275 * lower value, which is NOT what we want. 1276 * XXX this needs to be cleaned up a lot 1277 * more. 1278 */ 1279 vap->va_size = np->n_size; 1280 np->n_attrstamp = 0; 1281 if ((np->n_flag & NLMODIFIED) == 0) 1282 np->n_flag |= NRMODIFIED; 1283 } else if (np->n_flag & NLMODIFIED) { 1284 /* 1285 * We've modified the file: Use the larger 1286 * of our size, and the server's size. At 1287 * this point the cache coherency is all 1288 * shot to hell. To try to handle multiple 1289 * clients appending to the file at the same 1290 * time mark that the server has changed 1291 * the file if the server's notion of the 1292 * file size is larger then our notion. 1293 * 1294 * XXX this needs work. 1295 */ 1296 if (vap->va_size < np->n_size) { 1297 vap->va_size = np->n_size; 1298 } else { 1299 np->n_size = vap->va_size; 1300 np->n_flag |= NRMODIFIED; 1301 } 1302 } else { 1303 /* 1304 * Someone changed the file's size on the 1305 * server and there are no local changes 1306 * to get in the way, set the size and mark 1307 * it. 1308 */ 1309 np->n_size = vap->va_size; 1310 np->n_flag |= NRMODIFIED; 1311 } 1312 vnode_pager_setsize(vp, np->n_size); 1313 } else { 1314 np->n_size = vap->va_size; 1315 } 1316 } 1317 if (vaper != NULL) { 1318 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1319 if (np->n_flag & NCHG) { 1320 if (np->n_flag & NACC) 1321 vaper->va_atime = np->n_atim; 1322 if (np->n_flag & NUPD) 1323 vaper->va_mtime = np->n_mtim; 1324 } 1325 } 1326 return (0); 1327 } 1328 1329 #ifdef NFS_ACDEBUG 1330 #include <sys/sysctl.h> 1331 SYSCTL_DECL(_vfs_nfs); 1332 static int nfs_acdebug; 1333 SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, ""); 1334 #endif 1335 1336 /* 1337 * Check the time stamp 1338 * If the cache is valid, copy contents to *vap and return 0 1339 * otherwise return an error 1340 */ 1341 int 1342 nfs_getattrcache(struct vnode *vp, struct vattr *vaper) 1343 { 1344 struct nfsnode *np; 1345 struct vattr *vap; 1346 struct nfsmount *nmp; 1347 int timeo; 1348 1349 np = VTONFS(vp); 1350 vap = &np->n_vattr; 1351 nmp = VFSTONFS(vp->v_mount); 1352 1353 /* 1354 * Dynamic timeout based on how recently the file was modified. 1355 * n_mtime is always valid. 1356 */ 1357 timeo = (get_approximate_time_t() - np->n_mtime) / 60; 1358 1359 #ifdef NFS_ACDEBUG 1360 if (nfs_acdebug>1) 1361 kprintf("nfs_getattrcache: initial timeo = %d\n", timeo); 1362 #endif 1363 1364 if (vap->va_type == VDIR) { 1365 if ((np->n_flag & NLMODIFIED) || 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 & NLMODIFIED) || 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 kprintf("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 kprintf("nfs_getattrcache: age = %d; final timeo = %d\n", 1384 (int)(time_second - np->n_attrstamp), timeo); 1385 #endif 1386 1387 if (np->n_attrstamp == 0 || (time_second - np->n_attrstamp) >= timeo) { 1388 nfsstats.attrcache_misses++; 1389 return (ENOENT); 1390 } 1391 nfsstats.attrcache_hits++; 1392 1393 /* 1394 * Our attribute cache can be stale due to modifications made on 1395 * this host. XXX this is a bad hack. We need a more deterministic 1396 * means of finding out which np fields are valid verses attr cache 1397 * fields. We really should update the vattr info on the fly when 1398 * making local changes. 1399 */ 1400 if (vap->va_size != np->n_size) { 1401 if (vap->va_type == VREG) { 1402 if (np->n_flag & NLMODIFIED) { 1403 if (vap->va_size < np->n_size) 1404 vap->va_size = np->n_size; 1405 else 1406 np->n_size = vap->va_size; 1407 } else { 1408 np->n_size = vap->va_size; 1409 } 1410 vnode_pager_setsize(vp, np->n_size); 1411 } else { 1412 np->n_size = vap->va_size; 1413 } 1414 } 1415 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1416 if (np->n_flag & NCHG) { 1417 if (np->n_flag & NACC) 1418 vaper->va_atime = np->n_atim; 1419 if (np->n_flag & NUPD) 1420 vaper->va_mtime = np->n_mtim; 1421 } 1422 return (0); 1423 } 1424 1425 #ifndef NFS_NOSERVER 1426 1427 /* 1428 * Set up nameidata for a lookup() call and do it. 1429 * 1430 * If pubflag is set, this call is done for a lookup operation on the 1431 * public filehandle. In that case we allow crossing mountpoints and 1432 * absolute pathnames. However, the caller is expected to check that 1433 * the lookup result is within the public fs, and deny access if 1434 * it is not. 1435 * 1436 * dirp may be set whether an error is returned or not, and must be 1437 * released by the caller. 1438 * 1439 * On return nd->nl_nch usually points to the target ncp, which may represent 1440 * a negative hit. 1441 * 1442 * NOTE: the caller must call nlookup_done(nd) unconditionally on return 1443 * to cleanup. 1444 */ 1445 int 1446 nfs_namei(struct nlookupdata *nd, struct ucred *cred, int nflags, 1447 struct vnode **dvpp, struct vnode **vpp, 1448 fhandle_t *fhp, int len, 1449 struct nfssvc_sock *slp, struct sockaddr *nam, struct mbuf **mdp, 1450 caddr_t *dposp, struct vnode **dirpp, struct thread *td, 1451 int kerbflag, int pubflag) 1452 { 1453 int i, rem; 1454 struct mbuf *md; 1455 char *fromcp, *tocp, *cp; 1456 char *namebuf; 1457 struct nchandle nch; 1458 struct vnode *dp; 1459 struct mount *mp; 1460 int error, rdonly; 1461 1462 namebuf = objcache_get(namei_oc, M_WAITOK); 1463 *dirpp = NULL; 1464 1465 /* 1466 * Copy the name from the mbuf list to namebuf. 1467 */ 1468 fromcp = *dposp; 1469 tocp = namebuf; 1470 md = *mdp; 1471 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1472 for (i = 0; i < len; i++) { 1473 while (rem == 0) { 1474 md = md->m_next; 1475 if (md == NULL) { 1476 error = EBADRPC; 1477 goto out; 1478 } 1479 fromcp = mtod(md, caddr_t); 1480 rem = md->m_len; 1481 } 1482 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1483 error = EACCES; 1484 goto out; 1485 } 1486 *tocp++ = *fromcp++; 1487 rem--; 1488 } 1489 *tocp = '\0'; 1490 *mdp = md; 1491 *dposp = fromcp; 1492 len = nfsm_rndup(len)-len; 1493 if (len > 0) { 1494 if (rem >= len) 1495 *dposp += len; 1496 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1497 goto out; 1498 } 1499 1500 /* 1501 * Extract and set starting directory. The returned dp is refd 1502 * but not locked. 1503 */ 1504 error = nfsrv_fhtovp(fhp, FALSE, &mp, &dp, cred, slp, 1505 nam, &rdonly, kerbflag, pubflag); 1506 if (error) 1507 goto out; 1508 if (dp->v_type != VDIR) { 1509 vrele(dp); 1510 error = ENOTDIR; 1511 goto out; 1512 } 1513 1514 /* 1515 * Set return directory. Reference to dp is implicitly transfered 1516 * to the returned pointer. This must be set before we potentially 1517 * goto out below. 1518 */ 1519 *dirpp = dp; 1520 1521 if (pubflag) { 1522 /* 1523 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1524 * and the 'native path' indicator. 1525 */ 1526 cp = objcache_get(namei_oc, M_WAITOK); 1527 fromcp = namebuf; 1528 tocp = cp; 1529 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1530 switch ((unsigned char)*fromcp) { 1531 case WEBNFS_NATIVE_CHAR: 1532 /* 1533 * 'Native' path for us is the same 1534 * as a path according to the NFS spec, 1535 * just skip the escape char. 1536 */ 1537 fromcp++; 1538 break; 1539 /* 1540 * More may be added in the future, range 0x80-0xff 1541 */ 1542 default: 1543 error = EIO; 1544 objcache_put(namei_oc, cp); 1545 goto out; 1546 } 1547 } 1548 /* 1549 * Translate the '%' escapes, URL-style. 1550 */ 1551 while (*fromcp != '\0') { 1552 if (*fromcp == WEBNFS_ESC_CHAR) { 1553 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1554 fromcp++; 1555 *tocp++ = HEXSTRTOI(fromcp); 1556 fromcp += 2; 1557 continue; 1558 } else { 1559 error = ENOENT; 1560 objcache_put(namei_oc, cp); 1561 goto out; 1562 } 1563 } else 1564 *tocp++ = *fromcp++; 1565 } 1566 *tocp = '\0'; 1567 objcache_put(namei_oc, namebuf); 1568 namebuf = cp; 1569 } 1570 1571 /* 1572 * Setup for search. We need to get a start directory from dp. Note 1573 * that dp is ref'd, but we no longer 'own' the ref (*dirpp owns it). 1574 */ 1575 if (pubflag == 0) { 1576 nflags |= NLC_NFS_NOSOFTLINKTRAV; 1577 nflags |= NLC_NOCROSSMOUNT; 1578 } 1579 if (rdonly) 1580 nflags |= NLC_NFS_RDONLY; 1581 1582 /* 1583 * We need a starting ncp from the directory vnode dp. dp must not 1584 * be locked. The returned ncp will be refd but not locked. 1585 * 1586 * If no suitable ncp is found we instruct cache_fromdvp() to create 1587 * one. If this fails the directory has probably been removed while 1588 * the target was chdir'd into it and any further lookup will fail. 1589 */ 1590 if ((error = cache_fromdvp(dp, cred, 1, &nch)) != 0) 1591 goto out; 1592 nlookup_init_raw(nd, namebuf, UIO_SYSSPACE, nflags, cred, &nch); 1593 cache_drop(&nch); 1594 1595 /* 1596 * Ok, do the lookup. 1597 */ 1598 error = nlookup(nd); 1599 1600 /* 1601 * If no error occured return the requested dvpp and vpp. If 1602 * NLC_CREATE was specified nd->nl_nch may represent a negative 1603 * cache hit in which case we do not attempt to obtain the vp. 1604 */ 1605 if (error == 0) { 1606 if (dvpp) { 1607 if (nd->nl_nch.ncp->nc_parent) { 1608 nch = nd->nl_nch; 1609 nch.ncp = nch.ncp->nc_parent; 1610 error = cache_vget(&nch, nd->nl_cred, 1611 LK_EXCLUSIVE, dvpp); 1612 } else { 1613 error = ENXIO; 1614 } 1615 } 1616 if (vpp && nd->nl_nch.ncp->nc_vp) { 1617 error = cache_vget(&nd->nl_nch, nd->nl_cred, LK_EXCLUSIVE, vpp); 1618 } 1619 if (error) { 1620 if (dvpp && *dvpp) { 1621 vput(*dvpp); 1622 *dvpp = NULL; 1623 } 1624 if (vpp && *vpp) { 1625 vput(*vpp); 1626 *vpp = NULL; 1627 } 1628 } 1629 } 1630 1631 /* 1632 * Finish up. 1633 */ 1634 out: 1635 objcache_put(namei_oc, namebuf); 1636 return (error); 1637 } 1638 1639 /* 1640 * A fiddled version of m_adj() that ensures null fill to a long 1641 * boundary and only trims off the back end 1642 */ 1643 void 1644 nfsm_adj(struct mbuf *mp, int len, int nul) 1645 { 1646 struct mbuf *m; 1647 int count, i; 1648 char *cp; 1649 1650 /* 1651 * Trim from tail. Scan the mbuf chain, 1652 * calculating its length and finding the last mbuf. 1653 * If the adjustment only affects this mbuf, then just 1654 * adjust and return. Otherwise, rescan and truncate 1655 * after the remaining size. 1656 */ 1657 count = 0; 1658 m = mp; 1659 for (;;) { 1660 count += m->m_len; 1661 if (m->m_next == NULL) 1662 break; 1663 m = m->m_next; 1664 } 1665 if (m->m_len > len) { 1666 m->m_len -= len; 1667 if (nul > 0) { 1668 cp = mtod(m, caddr_t)+m->m_len-nul; 1669 for (i = 0; i < nul; i++) 1670 *cp++ = '\0'; 1671 } 1672 return; 1673 } 1674 count -= len; 1675 if (count < 0) 1676 count = 0; 1677 /* 1678 * Correct length for chain is "count". 1679 * Find the mbuf with last data, adjust its length, 1680 * and toss data from remaining mbufs on chain. 1681 */ 1682 for (m = mp; m; m = m->m_next) { 1683 if (m->m_len >= count) { 1684 m->m_len = count; 1685 if (nul > 0) { 1686 cp = mtod(m, caddr_t)+m->m_len-nul; 1687 for (i = 0; i < nul; i++) 1688 *cp++ = '\0'; 1689 } 1690 break; 1691 } 1692 count -= m->m_len; 1693 } 1694 for (m = m->m_next;m;m = m->m_next) 1695 m->m_len = 0; 1696 } 1697 1698 /* 1699 * Make these functions instead of macros, so that the kernel text size 1700 * doesn't get too big... 1701 */ 1702 void 1703 nfsm_srvwcc(struct nfsrv_descript *nfsd, int before_ret, 1704 struct vattr *before_vap, int after_ret, struct vattr *after_vap, 1705 struct mbuf **mbp, char **bposp) 1706 { 1707 struct mbuf *mb = *mbp, *mb2; 1708 char *bpos = *bposp; 1709 u_int32_t *tl; 1710 1711 /* 1712 * before_ret is 0 if before_vap is valid, non-zero if it isn't. 1713 */ 1714 if (before_ret) { 1715 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1716 *tl = nfs_false; 1717 } else { 1718 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 1719 *tl++ = nfs_true; 1720 txdr_hyper(before_vap->va_size, tl); 1721 tl += 2; 1722 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1723 tl += 2; 1724 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1725 } 1726 *bposp = bpos; 1727 *mbp = mb; 1728 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1729 } 1730 1731 void 1732 nfsm_srvpostopattr(struct nfsrv_descript *nfsd, int after_ret, 1733 struct vattr *after_vap, struct mbuf **mbp, char **bposp) 1734 { 1735 struct mbuf *mb = *mbp, *mb2; 1736 char *bpos = *bposp; 1737 u_int32_t *tl; 1738 struct nfs_fattr *fp; 1739 1740 if (after_ret) { 1741 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1742 *tl = nfs_false; 1743 } else { 1744 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 1745 *tl++ = nfs_true; 1746 fp = (struct nfs_fattr *)tl; 1747 nfsm_srvfattr(nfsd, after_vap, fp); 1748 } 1749 *mbp = mb; 1750 *bposp = bpos; 1751 } 1752 1753 void 1754 nfsm_srvfattr(struct nfsrv_descript *nfsd, struct vattr *vap, 1755 struct nfs_fattr *fp) 1756 { 1757 /* 1758 * NFS seems to truncate nlink to 16 bits, don't let it overflow. 1759 */ 1760 if (vap->va_nlink > 65535) 1761 fp->fa_nlink = 65535; 1762 else 1763 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1764 fp->fa_uid = txdr_unsigned(vap->va_uid); 1765 fp->fa_gid = txdr_unsigned(vap->va_gid); 1766 if (nfsd->nd_flag & ND_NFSV3) { 1767 fp->fa_type = vtonfsv3_type(vap->va_type); 1768 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1769 txdr_hyper(vap->va_size, &fp->fa3_size); 1770 txdr_hyper(vap->va_bytes, &fp->fa3_used); 1771 fp->fa3_rdev.specdata1 = txdr_unsigned(vap->va_rmajor); 1772 fp->fa3_rdev.specdata2 = txdr_unsigned(vap->va_rminor); 1773 fp->fa3_fsid.nfsuquad[0] = 0; 1774 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1775 txdr_hyper(vap->va_fileid, &fp->fa3_fileid); 1776 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1777 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1778 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1779 } else { 1780 fp->fa_type = vtonfsv2_type(vap->va_type); 1781 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1782 fp->fa2_size = txdr_unsigned(vap->va_size); 1783 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1784 if (vap->va_type == VFIFO) 1785 fp->fa2_rdev = 0xffffffff; 1786 else 1787 fp->fa2_rdev = txdr_unsigned(makeudev(vap->va_rmajor, vap->va_rminor)); 1788 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1789 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1790 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1791 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1792 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1793 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1794 } 1795 } 1796 1797 /* 1798 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1799 * - look up fsid in mount list (if not found ret error) 1800 * - get vp and export rights by calling VFS_FHTOVP() 1801 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1802 * - if not lockflag unlock it with vn_unlock() 1803 */ 1804 int 1805 nfsrv_fhtovp(fhandle_t *fhp, int lockflag, 1806 struct mount **mpp, struct vnode **vpp, 1807 struct ucred *cred, struct nfssvc_sock *slp, struct sockaddr *nam, 1808 int *rdonlyp, int kerbflag, int pubflag) 1809 { 1810 struct mount *mp; 1811 int i; 1812 struct ucred *credanon; 1813 int error, exflags; 1814 #ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */ 1815 struct sockaddr_int *saddr; 1816 #endif 1817 1818 *vpp = NULL; 1819 *mpp = NULL; 1820 1821 if (nfs_ispublicfh(fhp)) { 1822 if (!pubflag || !nfs_pub.np_valid) 1823 return (ESTALE); 1824 fhp = &nfs_pub.np_handle; 1825 } 1826 1827 mp = *mpp = vfs_getvfs(&fhp->fh_fsid); 1828 if (mp == NULL) 1829 return (ESTALE); 1830 error = VFS_CHECKEXP(mp, nam, &exflags, &credanon); 1831 if (error) 1832 return (error); 1833 error = VFS_FHTOVP(mp, NULL, &fhp->fh_fid, vpp); 1834 if (error) 1835 return (error); 1836 #ifdef MNT_EXNORESPORT 1837 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 1838 saddr = (struct sockaddr_in *)nam; 1839 if (saddr->sin_family == AF_INET && 1840 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 1841 vput(*vpp); 1842 *vpp = NULL; 1843 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1844 } 1845 } 1846 #endif 1847 /* 1848 * Check/setup credentials. 1849 */ 1850 if (exflags & MNT_EXKERB) { 1851 if (!kerbflag) { 1852 vput(*vpp); 1853 *vpp = NULL; 1854 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1855 } 1856 } else if (kerbflag) { 1857 vput(*vpp); 1858 *vpp = NULL; 1859 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1860 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1861 cred->cr_uid = credanon->cr_uid; 1862 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1863 cred->cr_groups[i] = credanon->cr_groups[i]; 1864 cred->cr_ngroups = i; 1865 } 1866 if (exflags & MNT_EXRDONLY) 1867 *rdonlyp = 1; 1868 else 1869 *rdonlyp = 0; 1870 1871 if (!lockflag) 1872 vn_unlock(*vpp); 1873 return (0); 1874 } 1875 1876 1877 /* 1878 * WebNFS: check if a filehandle is a public filehandle. For v3, this 1879 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 1880 * transformed this to all zeroes in both cases, so check for it. 1881 */ 1882 int 1883 nfs_ispublicfh(fhandle_t *fhp) 1884 { 1885 char *cp = (char *)fhp; 1886 int i; 1887 1888 for (i = 0; i < NFSX_V3FH; i++) 1889 if (*cp++ != 0) 1890 return (FALSE); 1891 return (TRUE); 1892 } 1893 1894 #endif /* NFS_NOSERVER */ 1895 /* 1896 * This function compares two net addresses by family and returns TRUE 1897 * if they are the same host. 1898 * If there is any doubt, return FALSE. 1899 * The AF_INET family is handled as a special case so that address mbufs 1900 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1901 */ 1902 int 1903 netaddr_match(int family, union nethostaddr *haddr, struct sockaddr *nam) 1904 { 1905 struct sockaddr_in *inetaddr; 1906 1907 switch (family) { 1908 case AF_INET: 1909 inetaddr = (struct sockaddr_in *)nam; 1910 if (inetaddr->sin_family == AF_INET && 1911 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1912 return (1); 1913 break; 1914 default: 1915 break; 1916 }; 1917 return (0); 1918 } 1919 1920 static nfsuint64 nfs_nullcookie = { { 0, 0 } }; 1921 /* 1922 * This function finds the directory cookie that corresponds to the 1923 * logical byte offset given. 1924 */ 1925 nfsuint64 * 1926 nfs_getcookie(struct nfsnode *np, off_t off, int add) 1927 { 1928 struct nfsdmap *dp, *dp2; 1929 int pos; 1930 1931 pos = (uoff_t)off / NFS_DIRBLKSIZ; 1932 if (pos == 0 || off < 0) { 1933 #ifdef DIAGNOSTIC 1934 if (add) 1935 panic("nfs getcookie add at <= 0"); 1936 #endif 1937 return (&nfs_nullcookie); 1938 } 1939 pos--; 1940 dp = np->n_cookies.lh_first; 1941 if (!dp) { 1942 if (add) { 1943 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 1944 M_NFSDIROFF, M_WAITOK); 1945 dp->ndm_eocookie = 0; 1946 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 1947 } else 1948 return (NULL); 1949 } 1950 while (pos >= NFSNUMCOOKIES) { 1951 pos -= NFSNUMCOOKIES; 1952 if (dp->ndm_list.le_next) { 1953 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 1954 pos >= dp->ndm_eocookie) 1955 return (NULL); 1956 dp = dp->ndm_list.le_next; 1957 } else if (add) { 1958 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 1959 M_NFSDIROFF, M_WAITOK); 1960 dp2->ndm_eocookie = 0; 1961 LIST_INSERT_AFTER(dp, dp2, ndm_list); 1962 dp = dp2; 1963 } else 1964 return (NULL); 1965 } 1966 if (pos >= dp->ndm_eocookie) { 1967 if (add) 1968 dp->ndm_eocookie = pos + 1; 1969 else 1970 return (NULL); 1971 } 1972 return (&dp->ndm_cookies[pos]); 1973 } 1974 1975 /* 1976 * Invalidate cached directory information, except for the actual directory 1977 * blocks (which are invalidated separately). 1978 * Done mainly to avoid the use of stale offset cookies. 1979 */ 1980 void 1981 nfs_invaldir(struct vnode *vp) 1982 { 1983 struct nfsnode *np = VTONFS(vp); 1984 1985 #ifdef DIAGNOSTIC 1986 if (vp->v_type != VDIR) 1987 panic("nfs: invaldir not dir"); 1988 #endif 1989 np->n_direofoffset = 0; 1990 np->n_cookieverf.nfsuquad[0] = 0; 1991 np->n_cookieverf.nfsuquad[1] = 0; 1992 if (np->n_cookies.lh_first) 1993 np->n_cookies.lh_first->ndm_eocookie = 0; 1994 } 1995 1996 /* 1997 * Set the v_type field for an NFS client's vnode and initialize for 1998 * buffer cache operations if necessary. 1999 */ 2000 void 2001 nfs_setvtype(struct vnode *vp, enum vtype vtyp) 2002 { 2003 vp->v_type = vtyp; 2004 2005 switch(vtyp) { 2006 case VREG: 2007 case VDIR: 2008 case VLNK: 2009 vinitvmio(vp, 0); /* needs VMIO, size not yet known */ 2010 break; 2011 default: 2012 break; 2013 } 2014 } 2015 2016 /* 2017 * The write verifier has changed (probably due to a server reboot), so all 2018 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2019 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2020 * and B_CLUSTEROK flags. Once done the new write verifier can be set for the 2021 * mount point. 2022 * 2023 * B_CLUSTEROK must be cleared along with B_NEEDCOMMIT because stage 1 data 2024 * writes are not clusterable. 2025 */ 2026 2027 static int nfs_clearcommit_bp(struct buf *bp, void *data __unused); 2028 2029 void 2030 nfs_clearcommit(struct mount *mp) 2031 { 2032 struct vnode *vp, *nvp; 2033 lwkt_tokref ilock; 2034 2035 lwkt_gettoken(&ilock, &mntvnode_token); 2036 crit_enter(); 2037 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp; vp = nvp) { 2038 nvp = TAILQ_NEXT(vp, v_nmntvnodes); /* ZZZ */ 2039 RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL, 2040 nfs_clearcommit_bp, NULL); 2041 } 2042 crit_exit(); 2043 lwkt_reltoken(&ilock); 2044 } 2045 2046 static int 2047 nfs_clearcommit_bp(struct buf *bp, void *data __unused) 2048 { 2049 if (BUF_REFCNT(bp) == 0 && 2050 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) 2051 == (B_DELWRI | B_NEEDCOMMIT)) { 2052 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 2053 } 2054 return(0); 2055 } 2056 2057 #ifndef NFS_NOSERVER 2058 /* 2059 * Map errnos to NFS error numbers. For Version 3 also filter out error 2060 * numbers not specified for the associated procedure. 2061 */ 2062 int 2063 nfsrv_errmap(struct nfsrv_descript *nd, int err) 2064 { 2065 short *defaulterrp, *errp; 2066 2067 if (nd->nd_flag & ND_NFSV3) { 2068 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2069 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2070 while (*++errp) { 2071 if (*errp == err) 2072 return (err); 2073 else if (*errp > err) 2074 break; 2075 } 2076 return ((int)*defaulterrp); 2077 } else 2078 return (err & 0xffff); 2079 } 2080 if (err <= ELAST) 2081 return ((int)nfsrv_v2errmap[err - 1]); 2082 return (NFSERR_IO); 2083 } 2084 2085 /* 2086 * Sort the group list in increasing numerical order. 2087 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 2088 * that used to be here.) 2089 */ 2090 void 2091 nfsrvw_sort(gid_t *list, int num) 2092 { 2093 int i, j; 2094 gid_t v; 2095 2096 /* Insertion sort. */ 2097 for (i = 1; i < num; i++) { 2098 v = list[i]; 2099 /* find correct slot for value v, moving others up */ 2100 for (j = i; --j >= 0 && v < list[j];) 2101 list[j + 1] = list[j]; 2102 list[j + 1] = v; 2103 } 2104 } 2105 2106 /* 2107 * copy credentials making sure that the result can be compared with bcmp(). 2108 */ 2109 void 2110 nfsrv_setcred(struct ucred *incred, struct ucred *outcred) 2111 { 2112 int i; 2113 2114 bzero((caddr_t)outcred, sizeof (struct ucred)); 2115 outcred->cr_ref = 1; 2116 outcred->cr_uid = incred->cr_uid; 2117 outcred->cr_ngroups = incred->cr_ngroups; 2118 for (i = 0; i < incred->cr_ngroups; i++) 2119 outcred->cr_groups[i] = incred->cr_groups[i]; 2120 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 2121 } 2122 #endif /* NFS_NOSERVER */ 2123