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 1.24 2004/12/17 00:18:28 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 and 1167 * Iff vap not NULL 1168 * copy the attributes to *vaper 1169 */ 1170 int 1171 nfs_loadattrcache(struct vnode **vpp, struct mbuf **mdp, caddr_t *dposp, 1172 struct vattr *vaper, int dontshrink) 1173 { 1174 struct vnode *vp = *vpp; 1175 struct vattr *vap; 1176 struct nfs_fattr *fp; 1177 struct nfsnode *np; 1178 int32_t t1; 1179 caddr_t cp2; 1180 int error = 0; 1181 udev_t rdev; 1182 struct mbuf *md; 1183 enum vtype vtyp; 1184 u_short vmode; 1185 struct timespec mtime; 1186 int v3 = NFS_ISV3(vp); 1187 1188 md = *mdp; 1189 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1190 if ((error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) != 0) 1191 return (error); 1192 fp = (struct nfs_fattr *)cp2; 1193 if (v3) { 1194 vtyp = nfsv3tov_type(fp->fa_type); 1195 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1196 rdev = makeudev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), 1197 fxdr_unsigned(int, fp->fa3_rdev.specdata2)); 1198 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1199 } else { 1200 vtyp = nfsv2tov_type(fp->fa_type); 1201 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1202 /* 1203 * XXX 1204 * 1205 * The duplicate information returned in fa_type and fa_mode 1206 * is an ambiguity in the NFS version 2 protocol. 1207 * 1208 * VREG should be taken literally as a regular file. If a 1209 * server intents to return some type information differently 1210 * in the upper bits of the mode field (e.g. for sockets, or 1211 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1212 * leave the examination of the mode bits even in the VREG 1213 * case to avoid breakage for bogus servers, but we make sure 1214 * that there are actually type bits set in the upper part of 1215 * fa_mode (and failing that, trust the va_type field). 1216 * 1217 * NFSv3 cleared the issue, and requires fa_mode to not 1218 * contain any type information (while also introduing sockets 1219 * and FIFOs for fa_type). 1220 */ 1221 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1222 vtyp = IFTOVT(vmode); 1223 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1224 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1225 1226 /* 1227 * Really ugly NFSv2 kludge. 1228 */ 1229 if (vtyp == VCHR && rdev == (udev_t)0xffffffff) 1230 vtyp = VFIFO; 1231 } 1232 1233 /* 1234 * If v_type == VNON it is a new node, so fill in the v_type, 1235 * n_mtime fields. Check to see if it represents a special 1236 * device, and if so, check for a possible alias. Once the 1237 * correct vnode has been obtained, fill in the rest of the 1238 * information. 1239 */ 1240 np = VTONFS(vp); 1241 if (vp->v_type != vtyp) { 1242 vp->v_type = vtyp; 1243 if (vp->v_type == VFIFO) { 1244 vp->v_ops = &vp->v_mount->mnt_vn_fifo_ops; 1245 } else if (vp->v_type == VCHR || vp->v_type == VBLK) { 1246 vp->v_ops = &vp->v_mount->mnt_vn_spec_ops; 1247 addaliasu(vp, rdev); 1248 } else { 1249 vp->v_ops = &vp->v_mount->mnt_vn_use_ops; 1250 } 1251 np->n_mtime = mtime.tv_sec; 1252 } 1253 vap = &np->n_vattr; 1254 vap->va_type = vtyp; 1255 vap->va_mode = (vmode & 07777); 1256 vap->va_rdev = rdev; 1257 vap->va_mtime = mtime; 1258 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1259 if (v3) { 1260 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1261 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1262 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1263 vap->va_size = fxdr_hyper(&fp->fa3_size); 1264 vap->va_blocksize = NFS_FABLKSIZE; 1265 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 1266 vap->va_fileid = fxdr_unsigned(int32_t, 1267 fp->fa3_fileid.nfsuquad[1]); 1268 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1269 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1270 vap->va_flags = 0; 1271 vap->va_filerev = 0; 1272 } else { 1273 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1274 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1275 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1276 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1277 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); 1278 vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) 1279 * NFS_FABLKSIZE; 1280 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1281 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1282 vap->va_flags = 0; 1283 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1284 fp->fa2_ctime.nfsv2_sec); 1285 vap->va_ctime.tv_nsec = 0; 1286 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1287 vap->va_filerev = 0; 1288 } 1289 np->n_attrstamp = time_second; 1290 if (vap->va_size != np->n_size) { 1291 if (vap->va_type == VREG) { 1292 if (dontshrink && vap->va_size < np->n_size) { 1293 /* 1294 * We've been told not to shrink the file; 1295 * zero np->n_attrstamp to indicate that 1296 * the attributes are stale. 1297 */ 1298 vap->va_size = np->n_size; 1299 np->n_attrstamp = 0; 1300 } else if (np->n_flag & NMODIFIED) { 1301 /* 1302 * We've modified the file: Use the larger 1303 * of our size, and the server's size. 1304 */ 1305 if (vap->va_size < np->n_size) { 1306 vap->va_size = np->n_size; 1307 } else { 1308 np->n_size = vap->va_size; 1309 np->n_flag |= NSIZECHANGED; 1310 } 1311 } else { 1312 np->n_size = vap->va_size; 1313 np->n_flag |= NSIZECHANGED; 1314 } 1315 vnode_pager_setsize(vp, np->n_size); 1316 } else { 1317 np->n_size = vap->va_size; 1318 } 1319 } 1320 if (vaper != NULL) { 1321 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1322 if (np->n_flag & NCHG) { 1323 if (np->n_flag & NACC) 1324 vaper->va_atime = np->n_atim; 1325 if (np->n_flag & NUPD) 1326 vaper->va_mtime = np->n_mtim; 1327 } 1328 } 1329 return (0); 1330 } 1331 1332 #ifdef NFS_ACDEBUG 1333 #include <sys/sysctl.h> 1334 SYSCTL_DECL(_vfs_nfs); 1335 static int nfs_acdebug; 1336 SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, ""); 1337 #endif 1338 1339 /* 1340 * Check the time stamp 1341 * If the cache is valid, copy contents to *vap and return 0 1342 * otherwise return an error 1343 */ 1344 int 1345 nfs_getattrcache(struct vnode *vp, struct vattr *vaper) 1346 { 1347 struct nfsnode *np; 1348 struct vattr *vap; 1349 struct nfsmount *nmp; 1350 int timeo; 1351 1352 np = VTONFS(vp); 1353 vap = &np->n_vattr; 1354 nmp = VFSTONFS(vp->v_mount); 1355 1356 /* 1357 * Dynamic timeout based on how recently the file was modified. 1358 */ 1359 timeo = (time_second - np->n_mtime) / 10; 1360 1361 #ifdef NFS_ACDEBUG 1362 if (nfs_acdebug>1) 1363 printf("nfs_getattrcache: initial timeo = %d\n", timeo); 1364 #endif 1365 1366 if (vap->va_type == VDIR) { 1367 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin) 1368 timeo = nmp->nm_acdirmin; 1369 else if (timeo > nmp->nm_acdirmax) 1370 timeo = nmp->nm_acdirmax; 1371 } else { 1372 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin) 1373 timeo = nmp->nm_acregmin; 1374 else if (timeo > nmp->nm_acregmax) 1375 timeo = nmp->nm_acregmax; 1376 } 1377 1378 #ifdef NFS_ACDEBUG 1379 if (nfs_acdebug > 2) 1380 printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n", 1381 nmp->nm_acregmin, nmp->nm_acregmax, 1382 nmp->nm_acdirmin, nmp->nm_acdirmax); 1383 1384 if (nfs_acdebug) 1385 printf("nfs_getattrcache: age = %d; final timeo = %d\n", 1386 (time_second - np->n_attrstamp), timeo); 1387 #endif 1388 1389 if ((time_second - np->n_attrstamp) >= timeo) { 1390 nfsstats.attrcache_misses++; 1391 return (ENOENT); 1392 } 1393 nfsstats.attrcache_hits++; 1394 if (vap->va_size != np->n_size) { 1395 if (vap->va_type == VREG) { 1396 if (np->n_flag & NMODIFIED) { 1397 if (vap->va_size < np->n_size) 1398 vap->va_size = np->n_size; 1399 else 1400 np->n_size = vap->va_size; 1401 } else { 1402 np->n_size = vap->va_size; 1403 } 1404 vnode_pager_setsize(vp, np->n_size); 1405 } else { 1406 np->n_size = vap->va_size; 1407 } 1408 } 1409 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1410 if (np->n_flag & NCHG) { 1411 if (np->n_flag & NACC) 1412 vaper->va_atime = np->n_atim; 1413 if (np->n_flag & NUPD) 1414 vaper->va_mtime = np->n_mtim; 1415 } 1416 return (0); 1417 } 1418 1419 #ifndef NFS_NOSERVER 1420 1421 /* 1422 * Set up nameidata for a lookup() call and do it. 1423 * 1424 * If pubflag is set, this call is done for a lookup operation on the 1425 * public filehandle. In that case we allow crossing mountpoints and 1426 * absolute pathnames. However, the caller is expected to check that 1427 * the lookup result is within the public fs, and deny access if 1428 * it is not. 1429 * 1430 * dirp may be set whether an error is returned or not, and must be 1431 * released by the caller. 1432 * 1433 * On return nd->nl_ncp usually points to the target ncp, which may represent 1434 * a negative hit. 1435 * 1436 * NOTE: the caller must call nlookup_done(nd) unconditionally on return 1437 * to cleanup. 1438 */ 1439 int 1440 nfs_namei(struct nlookupdata *nd, struct ucred *cred, int nameiop, 1441 struct vnode **dvpp, struct vnode **vpp, 1442 fhandle_t *fhp, int len, 1443 struct nfssvc_sock *slp, struct sockaddr *nam, struct mbuf **mdp, 1444 caddr_t *dposp, struct vnode **dirpp, struct thread *td, 1445 int kerbflag, int pubflag) 1446 { 1447 int i, rem; 1448 int flags; 1449 struct mbuf *md; 1450 char *fromcp, *tocp, *cp; 1451 char *namebuf; 1452 struct namecache *ncp; 1453 struct vnode *dp; 1454 int error, rdonly; 1455 1456 namebuf = zalloc(namei_zone); 1457 flags = 0; 1458 *dirpp = NULL; 1459 1460 /* 1461 * Copy the name from the mbuf list to namebuf. 1462 */ 1463 fromcp = *dposp; 1464 tocp = namebuf; 1465 md = *mdp; 1466 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1467 for (i = 0; i < len; i++) { 1468 while (rem == 0) { 1469 md = md->m_next; 1470 if (md == NULL) { 1471 error = EBADRPC; 1472 goto out; 1473 } 1474 fromcp = mtod(md, caddr_t); 1475 rem = md->m_len; 1476 } 1477 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1478 error = EACCES; 1479 goto out; 1480 } 1481 *tocp++ = *fromcp++; 1482 rem--; 1483 } 1484 *tocp = '\0'; 1485 *mdp = md; 1486 *dposp = fromcp; 1487 len = nfsm_rndup(len)-len; 1488 if (len > 0) { 1489 if (rem >= len) 1490 *dposp += len; 1491 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1492 goto out; 1493 } 1494 1495 /* 1496 * Extract and set starting directory. The returned dp is refd 1497 * but not locked. 1498 */ 1499 error = nfsrv_fhtovp(fhp, FALSE, &dp, cred, slp, 1500 nam, &rdonly, kerbflag, pubflag); 1501 if (error) 1502 goto out; 1503 if (dp->v_type != VDIR) { 1504 vrele(dp); 1505 error = ENOTDIR; 1506 goto out; 1507 } 1508 1509 /* 1510 * Set return directory. Reference to dp is implicitly transfered 1511 * to the returned pointer. This must be set before we potentially 1512 * goto out below. 1513 */ 1514 *dirpp = dp; 1515 1516 if (pubflag) { 1517 /* 1518 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1519 * and the 'native path' indicator. 1520 */ 1521 cp = zalloc(namei_zone); 1522 fromcp = namebuf; 1523 tocp = cp; 1524 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1525 switch ((unsigned char)*fromcp) { 1526 case WEBNFS_NATIVE_CHAR: 1527 /* 1528 * 'Native' path for us is the same 1529 * as a path according to the NFS spec, 1530 * just skip the escape char. 1531 */ 1532 fromcp++; 1533 break; 1534 /* 1535 * More may be added in the future, range 0x80-0xff 1536 */ 1537 default: 1538 error = EIO; 1539 zfree(namei_zone, cp); 1540 goto out; 1541 } 1542 } 1543 /* 1544 * Translate the '%' escapes, URL-style. 1545 */ 1546 while (*fromcp != '\0') { 1547 if (*fromcp == WEBNFS_ESC_CHAR) { 1548 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1549 fromcp++; 1550 *tocp++ = HEXSTRTOI(fromcp); 1551 fromcp += 2; 1552 continue; 1553 } else { 1554 error = ENOENT; 1555 zfree(namei_zone, cp); 1556 goto out; 1557 } 1558 } else 1559 *tocp++ = *fromcp++; 1560 } 1561 *tocp = '\0'; 1562 zfree(namei_zone, namebuf); 1563 namebuf = cp; 1564 } 1565 1566 /* 1567 * Setup for search. We need to get a start directory from dp. Note 1568 * that dp is ref'd, but we no longer 'own' the ref (*dirpp owns it). 1569 */ 1570 if (pubflag == 0) { 1571 flags |= NLC_NFS_NOSOFTLINKTRAV; 1572 flags |= NLC_NOCROSSMOUNT; 1573 } 1574 if (rdonly) 1575 flags |= NLC_NFS_RDONLY; 1576 if (nameiop == NAMEI_CREATE || nameiop == NAMEI_RENAME) 1577 flags |= NLC_CREATE; 1578 1579 /* 1580 * We need a starting ncp from the directory vnode dp. dp must not 1581 * be locked. The returned ncp will be refd but not locked. 1582 * 1583 * If no suitable ncp is found we instruct cache_fromdvp() to create 1584 * one. If this fails the directory has probably been removed while 1585 * the target was chdir'd into it and any further lookup will fail. 1586 */ 1587 if ((ncp = cache_fromdvp(dp, cred, 1)) == NULL) { 1588 error = EINVAL; 1589 goto out; 1590 } 1591 nlookup_init_raw(nd, namebuf, UIO_SYSSPACE, flags, cred, ncp); 1592 cache_drop(ncp); 1593 1594 /* 1595 * Ok, do the lookup. 1596 */ 1597 error = nlookup(nd); 1598 1599 /* 1600 * If no error occured return the requested dvpp and vpp. If 1601 * NLC_CREATE was specified nd->nl_ncp may represent a negative 1602 * cache hit in which case we do not attempt to obtain the vp. 1603 */ 1604 if (error == 0) { 1605 ncp = nd->nl_ncp; 1606 if (dvpp) { 1607 if (ncp->nc_parent && 1608 ncp->nc_parent->nc_mount == ncp->nc_mount) { 1609 error = cache_vget(ncp->nc_parent, nd->nl_cred, 1610 LK_EXCLUSIVE, dvpp); 1611 } else { 1612 error = ENXIO; 1613 } 1614 } 1615 if (vpp && ncp->nc_vp) { 1616 error = cache_vget(ncp, nd->nl_cred, LK_EXCLUSIVE, vpp); 1617 } 1618 if (error) { 1619 if (dvpp && *dvpp) { 1620 vput(*dvpp); 1621 *dvpp = NULL; 1622 } 1623 if (vpp && *vpp) { 1624 vput(*vpp); 1625 *vpp = NULL; 1626 } 1627 } 1628 } 1629 1630 /* 1631 * Finish up. 1632 */ 1633 out: 1634 zfree(namei_zone, namebuf); 1635 return (error); 1636 } 1637 1638 /* 1639 * A fiddled version of m_adj() that ensures null fill to a long 1640 * boundary and only trims off the back end 1641 */ 1642 void 1643 nfsm_adj(struct mbuf *mp, int len, int nul) 1644 { 1645 struct mbuf *m; 1646 int count, i; 1647 char *cp; 1648 1649 /* 1650 * Trim from tail. Scan the mbuf chain, 1651 * calculating its length and finding the last mbuf. 1652 * If the adjustment only affects this mbuf, then just 1653 * adjust and return. Otherwise, rescan and truncate 1654 * after the remaining size. 1655 */ 1656 count = 0; 1657 m = mp; 1658 for (;;) { 1659 count += m->m_len; 1660 if (m->m_next == (struct mbuf *)0) 1661 break; 1662 m = m->m_next; 1663 } 1664 if (m->m_len > len) { 1665 m->m_len -= len; 1666 if (nul > 0) { 1667 cp = mtod(m, caddr_t)+m->m_len-nul; 1668 for (i = 0; i < nul; i++) 1669 *cp++ = '\0'; 1670 } 1671 return; 1672 } 1673 count -= len; 1674 if (count < 0) 1675 count = 0; 1676 /* 1677 * Correct length for chain is "count". 1678 * Find the mbuf with last data, adjust its length, 1679 * and toss data from remaining mbufs on chain. 1680 */ 1681 for (m = mp; m; m = m->m_next) { 1682 if (m->m_len >= count) { 1683 m->m_len = count; 1684 if (nul > 0) { 1685 cp = mtod(m, caddr_t)+m->m_len-nul; 1686 for (i = 0; i < nul; i++) 1687 *cp++ = '\0'; 1688 } 1689 break; 1690 } 1691 count -= m->m_len; 1692 } 1693 for (m = m->m_next;m;m = m->m_next) 1694 m->m_len = 0; 1695 } 1696 1697 /* 1698 * Make these functions instead of macros, so that the kernel text size 1699 * doesn't get too big... 1700 */ 1701 void 1702 nfsm_srvwcc(struct nfsrv_descript *nfsd, int before_ret, 1703 struct vattr *before_vap, int after_ret, struct vattr *after_vap, 1704 struct mbuf **mbp, char **bposp) 1705 { 1706 struct mbuf *mb = *mbp, *mb2; 1707 char *bpos = *bposp; 1708 u_int32_t *tl; 1709 1710 if (before_ret) { 1711 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1712 *tl = nfs_false; 1713 } else { 1714 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 1715 *tl++ = nfs_true; 1716 txdr_hyper(before_vap->va_size, tl); 1717 tl += 2; 1718 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1719 tl += 2; 1720 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1721 } 1722 *bposp = bpos; 1723 *mbp = mb; 1724 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1725 } 1726 1727 void 1728 nfsm_srvpostopattr(struct nfsrv_descript *nfsd, int after_ret, 1729 struct vattr *after_vap, struct mbuf **mbp, char **bposp) 1730 { 1731 struct mbuf *mb = *mbp, *mb2; 1732 char *bpos = *bposp; 1733 u_int32_t *tl; 1734 struct nfs_fattr *fp; 1735 1736 if (after_ret) { 1737 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1738 *tl = nfs_false; 1739 } else { 1740 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 1741 *tl++ = nfs_true; 1742 fp = (struct nfs_fattr *)tl; 1743 nfsm_srvfattr(nfsd, after_vap, fp); 1744 } 1745 *mbp = mb; 1746 *bposp = bpos; 1747 } 1748 1749 void 1750 nfsm_srvfattr(struct nfsrv_descript *nfsd, struct vattr *vap, 1751 struct nfs_fattr *fp) 1752 { 1753 1754 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1755 fp->fa_uid = txdr_unsigned(vap->va_uid); 1756 fp->fa_gid = txdr_unsigned(vap->va_gid); 1757 if (nfsd->nd_flag & ND_NFSV3) { 1758 fp->fa_type = vtonfsv3_type(vap->va_type); 1759 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1760 txdr_hyper(vap->va_size, &fp->fa3_size); 1761 txdr_hyper(vap->va_bytes, &fp->fa3_used); 1762 fp->fa3_rdev.specdata1 = txdr_unsigned(umajor(vap->va_rdev)); 1763 fp->fa3_rdev.specdata2 = txdr_unsigned(uminor(vap->va_rdev)); 1764 fp->fa3_fsid.nfsuquad[0] = 0; 1765 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1766 fp->fa3_fileid.nfsuquad[0] = 0; 1767 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1768 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1769 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1770 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1771 } else { 1772 fp->fa_type = vtonfsv2_type(vap->va_type); 1773 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1774 fp->fa2_size = txdr_unsigned(vap->va_size); 1775 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1776 if (vap->va_type == VFIFO) 1777 fp->fa2_rdev = 0xffffffff; 1778 else 1779 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1780 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1781 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1782 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1783 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1784 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1785 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1786 } 1787 } 1788 1789 /* 1790 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1791 * - look up fsid in mount list (if not found ret error) 1792 * - get vp and export rights by calling VFS_FHTOVP() 1793 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1794 * - if not lockflag unlock it with VOP_UNLOCK() 1795 */ 1796 int 1797 nfsrv_fhtovp(fhandle_t *fhp, int lockflag, struct vnode **vpp, 1798 struct ucred *cred, struct nfssvc_sock *slp, struct sockaddr *nam, 1799 int *rdonlyp, int kerbflag, int pubflag) 1800 { 1801 struct thread *td = curthread; /* XXX */ 1802 struct mount *mp; 1803 int i; 1804 struct ucred *credanon; 1805 int error, exflags; 1806 #ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */ 1807 struct sockaddr_int *saddr; 1808 #endif 1809 1810 *vpp = (struct vnode *)0; 1811 1812 if (nfs_ispublicfh(fhp)) { 1813 if (!pubflag || !nfs_pub.np_valid) 1814 return (ESTALE); 1815 fhp = &nfs_pub.np_handle; 1816 } 1817 1818 mp = vfs_getvfs(&fhp->fh_fsid); 1819 if (!mp) 1820 return (ESTALE); 1821 error = VFS_CHECKEXP(mp, nam, &exflags, &credanon); 1822 if (error) 1823 return (error); 1824 error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp); 1825 if (error) 1826 return (error); 1827 #ifdef MNT_EXNORESPORT 1828 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 1829 saddr = (struct sockaddr_in *)nam; 1830 if (saddr->sin_family == AF_INET && 1831 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 1832 vput(*vpp); 1833 *vpp = NULL; 1834 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1835 } 1836 } 1837 #endif 1838 /* 1839 * Check/setup credentials. 1840 */ 1841 if (exflags & MNT_EXKERB) { 1842 if (!kerbflag) { 1843 vput(*vpp); 1844 *vpp = NULL; 1845 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1846 } 1847 } else if (kerbflag) { 1848 vput(*vpp); 1849 *vpp = NULL; 1850 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1851 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1852 cred->cr_uid = credanon->cr_uid; 1853 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1854 cred->cr_groups[i] = credanon->cr_groups[i]; 1855 cred->cr_ngroups = i; 1856 } 1857 if (exflags & MNT_EXRDONLY) 1858 *rdonlyp = 1; 1859 else 1860 *rdonlyp = 0; 1861 1862 nfsrv_object_create(*vpp); 1863 1864 if (!lockflag) 1865 VOP_UNLOCK(*vpp, 0, td); 1866 return (0); 1867 } 1868 1869 1870 /* 1871 * WebNFS: check if a filehandle is a public filehandle. For v3, this 1872 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 1873 * transformed this to all zeroes in both cases, so check for it. 1874 */ 1875 int 1876 nfs_ispublicfh(fhandle_t *fhp) 1877 { 1878 char *cp = (char *)fhp; 1879 int i; 1880 1881 for (i = 0; i < NFSX_V3FH; i++) 1882 if (*cp++ != 0) 1883 return (FALSE); 1884 return (TRUE); 1885 } 1886 1887 #endif /* NFS_NOSERVER */ 1888 /* 1889 * This function compares two net addresses by family and returns TRUE 1890 * if they are the same host. 1891 * If there is any doubt, return FALSE. 1892 * The AF_INET family is handled as a special case so that address mbufs 1893 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1894 */ 1895 int 1896 netaddr_match(int family, union nethostaddr *haddr, struct sockaddr *nam) 1897 { 1898 struct sockaddr_in *inetaddr; 1899 1900 switch (family) { 1901 case AF_INET: 1902 inetaddr = (struct sockaddr_in *)nam; 1903 if (inetaddr->sin_family == AF_INET && 1904 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1905 return (1); 1906 break; 1907 default: 1908 break; 1909 }; 1910 return (0); 1911 } 1912 1913 static nfsuint64 nfs_nullcookie = { { 0, 0 } }; 1914 /* 1915 * This function finds the directory cookie that corresponds to the 1916 * logical byte offset given. 1917 */ 1918 nfsuint64 * 1919 nfs_getcookie(struct nfsnode *np, off_t off, int add) 1920 { 1921 struct nfsdmap *dp, *dp2; 1922 int pos; 1923 1924 pos = (uoff_t)off / NFS_DIRBLKSIZ; 1925 if (pos == 0 || off < 0) { 1926 #ifdef DIAGNOSTIC 1927 if (add) 1928 panic("nfs getcookie add at <= 0"); 1929 #endif 1930 return (&nfs_nullcookie); 1931 } 1932 pos--; 1933 dp = np->n_cookies.lh_first; 1934 if (!dp) { 1935 if (add) { 1936 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 1937 M_NFSDIROFF, M_WAITOK); 1938 dp->ndm_eocookie = 0; 1939 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 1940 } else 1941 return ((nfsuint64 *)0); 1942 } 1943 while (pos >= NFSNUMCOOKIES) { 1944 pos -= NFSNUMCOOKIES; 1945 if (dp->ndm_list.le_next) { 1946 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 1947 pos >= dp->ndm_eocookie) 1948 return ((nfsuint64 *)0); 1949 dp = dp->ndm_list.le_next; 1950 } else if (add) { 1951 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 1952 M_NFSDIROFF, M_WAITOK); 1953 dp2->ndm_eocookie = 0; 1954 LIST_INSERT_AFTER(dp, dp2, ndm_list); 1955 dp = dp2; 1956 } else 1957 return ((nfsuint64 *)0); 1958 } 1959 if (pos >= dp->ndm_eocookie) { 1960 if (add) 1961 dp->ndm_eocookie = pos + 1; 1962 else 1963 return ((nfsuint64 *)0); 1964 } 1965 return (&dp->ndm_cookies[pos]); 1966 } 1967 1968 /* 1969 * Invalidate cached directory information, except for the actual directory 1970 * blocks (which are invalidated separately). 1971 * Done mainly to avoid the use of stale offset cookies. 1972 */ 1973 void 1974 nfs_invaldir(struct vnode *vp) 1975 { 1976 struct nfsnode *np = VTONFS(vp); 1977 1978 #ifdef DIAGNOSTIC 1979 if (vp->v_type != VDIR) 1980 panic("nfs: invaldir not dir"); 1981 #endif 1982 np->n_direofoffset = 0; 1983 np->n_cookieverf.nfsuquad[0] = 0; 1984 np->n_cookieverf.nfsuquad[1] = 0; 1985 if (np->n_cookies.lh_first) 1986 np->n_cookies.lh_first->ndm_eocookie = 0; 1987 } 1988 1989 /* 1990 * The write verifier has changed (probably due to a server reboot), so all 1991 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 1992 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 1993 * and B_CLUSTEROK flags. Once done the new write verifier can be set for the 1994 * mount point. 1995 * 1996 * B_CLUSTEROK must be cleared along with B_NEEDCOMMIT because stage 1 data 1997 * writes are not clusterable. 1998 */ 1999 void 2000 nfs_clearcommit(struct mount *mp) 2001 { 2002 struct vnode *vp, *nvp; 2003 struct buf *bp, *nbp; 2004 lwkt_tokref ilock; 2005 int s; 2006 2007 lwkt_gettoken(&ilock, &mntvnode_token); 2008 s = splbio(); 2009 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp; vp = nvp) { 2010 nvp = TAILQ_NEXT(vp, v_nmntvnodes); /* ZZZ */ 2011 if (vp->v_flag & VPLACEMARKER) 2012 continue; 2013 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 2014 nbp = TAILQ_NEXT(bp, b_vnbufs); 2015 if (BUF_REFCNT(bp) == 0 && 2016 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) 2017 == (B_DELWRI | B_NEEDCOMMIT)) { 2018 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 2019 } 2020 } 2021 } 2022 splx(s); 2023 lwkt_reltoken(&ilock); 2024 } 2025 2026 #ifndef NFS_NOSERVER 2027 /* 2028 * Map errnos to NFS error numbers. For Version 3 also filter out error 2029 * numbers not specified for the associated procedure. 2030 */ 2031 int 2032 nfsrv_errmap(struct nfsrv_descript *nd, int err) 2033 { 2034 short *defaulterrp, *errp; 2035 2036 if (nd->nd_flag & ND_NFSV3) { 2037 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2038 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2039 while (*++errp) { 2040 if (*errp == err) 2041 return (err); 2042 else if (*errp > err) 2043 break; 2044 } 2045 return ((int)*defaulterrp); 2046 } else 2047 return (err & 0xffff); 2048 } 2049 if (err <= ELAST) 2050 return ((int)nfsrv_v2errmap[err - 1]); 2051 return (NFSERR_IO); 2052 } 2053 2054 int 2055 nfsrv_object_create(struct vnode *vp) 2056 { 2057 struct thread *td = curthread; 2058 2059 if (vp == NULL || vp->v_type != VREG) 2060 return (1); 2061 return (vfs_object_create(vp, td)); 2062 } 2063 2064 /* 2065 * Sort the group list in increasing numerical order. 2066 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 2067 * that used to be here.) 2068 */ 2069 void 2070 nfsrvw_sort(gid_t *list, int num) 2071 { 2072 int i, j; 2073 gid_t v; 2074 2075 /* Insertion sort. */ 2076 for (i = 1; i < num; i++) { 2077 v = list[i]; 2078 /* find correct slot for value v, moving others up */ 2079 for (j = i; --j >= 0 && v < list[j];) 2080 list[j + 1] = list[j]; 2081 list[j + 1] = v; 2082 } 2083 } 2084 2085 /* 2086 * copy credentials making sure that the result can be compared with bcmp(). 2087 */ 2088 void 2089 nfsrv_setcred(struct ucred *incred, struct ucred *outcred) 2090 { 2091 int i; 2092 2093 bzero((caddr_t)outcred, sizeof (struct ucred)); 2094 outcred->cr_ref = 1; 2095 outcred->cr_uid = incred->cr_uid; 2096 outcred->cr_ngroups = incred->cr_ngroups; 2097 for (i = 0; i < incred->cr_ngroups; i++) 2098 outcred->cr_groups[i] = incred->cr_groups[i]; 2099 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 2100 } 2101 #endif /* NFS_NOSERVER */ 2102