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. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)nfs_subs.c 8.8 (Berkeley) 5/22/95 33 * $FreeBSD: /repoman/r/ncvs/src/sys/nfsclient/nfs_subs.c,v 1.128 2004/04/14 23:23:55 peadar Exp $ 34 */ 35 36 /* 37 * These functions support the macros and help fiddle mbuf chains for 38 * the nfs op functions. They do things like create the rpc header and 39 * copy data between mbuf chains and uio lists. 40 */ 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/kernel.h> 44 #include <sys/buf.h> 45 #include <sys/proc.h> 46 #include <sys/mount.h> 47 #include <sys/vnode.h> 48 #include <sys/nlookup.h> 49 #include <sys/namei.h> 50 #include <sys/mbuf.h> 51 #include <sys/socket.h> 52 #include <sys/stat.h> 53 #include <sys/malloc.h> 54 #include <sys/sysent.h> 55 #include <sys/syscall.h> 56 #include <sys/conf.h> 57 #include <sys/objcache.h> 58 59 #include <vm/vm.h> 60 #include <vm/vm_object.h> 61 #include <vm/vm_extern.h> 62 63 #include <sys/buf2.h> 64 65 #include "rpcv2.h" 66 #include "nfsproto.h" 67 #include "nfs.h" 68 #include "nfsmount.h" 69 #include "nfsnode.h" 70 #include "xdr_subs.h" 71 #include "nfsm_subs.h" 72 #include "nfsrtt.h" 73 74 #include <netinet/in.h> 75 76 MALLOC_DEFINE(M_NFSMOUNT, "NFS mount", "NFS mount"); 77 78 /* 79 * Data items converted to xdr at startup, since they are constant 80 * This is kinda hokey, but may save a little time doing byte swaps 81 */ 82 u_int32_t nfs_xdrneg1; 83 u_int32_t rpc_reply, rpc_msgdenied, rpc_mismatch, rpc_vers; 84 u_int32_t rpc_auth_unix, rpc_msgaccepted, rpc_call, rpc_autherr; 85 u_int32_t rpc_auth_kerb; 86 u_int32_t nfs_prog, nfs_true, nfs_false; 87 88 /* And other global data */ 89 static enum vtype nv2tov_type[8]= { 90 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON 91 }; 92 enum vtype nv3tov_type[8]= { 93 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO 94 }; 95 96 int nfs_ticks; 97 98 /* 99 * Protect master lists only. Primary protection uses the per-mount 100 * and per nfssvc_sock tokens. 101 */ 102 struct lwkt_token nfs_token = LWKT_TOKEN_INITIALIZER(unp_token); 103 104 static long nfs_pbuf_freecnt = -1; /* start out unlimited */ 105 106 struct nfsmount_head nfs_mountq = TAILQ_HEAD_INITIALIZER(nfs_mountq); 107 struct nfssvc_sockhead nfssvc_sockhead; 108 int nfssvc_sockhead_flag; 109 struct nfsd_head nfsd_head; 110 int nfsd_head_flag; 111 struct nfs_bufq nfs_bufq; 112 struct nqfhhashhead *nqfhhashtbl; 113 u_long nqfhhash; 114 115 static int nfs_prev_nfssvc_sy_narg; 116 static sy_call_t *nfs_prev_nfssvc_sy_call; 117 118 #ifndef NFS_NOSERVER 119 120 /* 121 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 122 */ 123 int nfsv3_procid[NFS_NPROCS] = { 124 NFSPROC_NULL, 125 NFSPROC_GETATTR, 126 NFSPROC_SETATTR, 127 NFSPROC_NOOP, 128 NFSPROC_LOOKUP, 129 NFSPROC_READLINK, 130 NFSPROC_READ, 131 NFSPROC_NOOP, 132 NFSPROC_WRITE, 133 NFSPROC_CREATE, 134 NFSPROC_REMOVE, 135 NFSPROC_RENAME, 136 NFSPROC_LINK, 137 NFSPROC_SYMLINK, 138 NFSPROC_MKDIR, 139 NFSPROC_RMDIR, 140 NFSPROC_READDIR, 141 NFSPROC_FSSTAT, 142 NFSPROC_NOOP, 143 NFSPROC_NOOP, 144 NFSPROC_NOOP, 145 NFSPROC_NOOP, 146 NFSPROC_NOOP, 147 NFSPROC_NOOP, 148 NFSPROC_NOOP, 149 NFSPROC_NOOP 150 }; 151 152 #endif /* NFS_NOSERVER */ 153 /* 154 * and the reverse mapping from generic to Version 2 procedure numbers 155 */ 156 int nfsv2_procid[NFS_NPROCS] = { 157 NFSV2PROC_NULL, 158 NFSV2PROC_GETATTR, 159 NFSV2PROC_SETATTR, 160 NFSV2PROC_LOOKUP, 161 NFSV2PROC_NOOP, 162 NFSV2PROC_READLINK, 163 NFSV2PROC_READ, 164 NFSV2PROC_WRITE, 165 NFSV2PROC_CREATE, 166 NFSV2PROC_MKDIR, 167 NFSV2PROC_SYMLINK, 168 NFSV2PROC_CREATE, 169 NFSV2PROC_REMOVE, 170 NFSV2PROC_RMDIR, 171 NFSV2PROC_RENAME, 172 NFSV2PROC_LINK, 173 NFSV2PROC_READDIR, 174 NFSV2PROC_NOOP, 175 NFSV2PROC_STATFS, 176 NFSV2PROC_NOOP, 177 NFSV2PROC_NOOP, 178 NFSV2PROC_NOOP, 179 NFSV2PROC_NOOP, 180 NFSV2PROC_NOOP, 181 NFSV2PROC_NOOP, 182 NFSV2PROC_NOOP, 183 }; 184 185 #ifndef NFS_NOSERVER 186 /* 187 * Maps errno values to nfs error numbers. 188 * Use NFSERR_IO as the catch all for ones not specifically defined in 189 * RFC 1094. 190 */ 191 static u_char nfsrv_v2errmap[ELAST] = { 192 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 193 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 194 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 195 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 196 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 197 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 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_IO, NFSERR_IO, NFSERR_IO, 203 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 204 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 205 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 206 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 207 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 208 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 209 NFSERR_IO /* << Last is 86 */ 210 }; 211 212 /* 213 * Maps errno values to nfs error numbers. 214 * Although it is not obvious whether or not NFS clients really care if 215 * a returned error value is in the specified list for the procedure, the 216 * safest thing to do is filter them appropriately. For Version 2, the 217 * X/Open XNFS document is the only specification that defines error values 218 * for each RPC (The RFC simply lists all possible error values for all RPCs), 219 * so I have decided to not do this for Version 2. 220 * The first entry is the default error return and the rest are the valid 221 * errors for that RPC in increasing numeric order. 222 */ 223 static short nfsv3err_null[] = { 224 0, 225 0, 226 }; 227 228 static short nfsv3err_getattr[] = { 229 NFSERR_IO, 230 NFSERR_IO, 231 NFSERR_STALE, 232 NFSERR_BADHANDLE, 233 NFSERR_SERVERFAULT, 234 0, 235 }; 236 237 static short nfsv3err_setattr[] = { 238 NFSERR_IO, 239 NFSERR_PERM, 240 NFSERR_IO, 241 NFSERR_ACCES, 242 NFSERR_INVAL, 243 NFSERR_NOSPC, 244 NFSERR_ROFS, 245 NFSERR_DQUOT, 246 NFSERR_STALE, 247 NFSERR_BADHANDLE, 248 NFSERR_NOT_SYNC, 249 NFSERR_SERVERFAULT, 250 0, 251 }; 252 253 static short nfsv3err_lookup[] = { 254 NFSERR_IO, 255 NFSERR_NOENT, 256 NFSERR_IO, 257 NFSERR_ACCES, 258 NFSERR_NOTDIR, 259 NFSERR_NAMETOL, 260 NFSERR_STALE, 261 NFSERR_BADHANDLE, 262 NFSERR_SERVERFAULT, 263 0, 264 }; 265 266 static short nfsv3err_access[] = { 267 NFSERR_IO, 268 NFSERR_IO, 269 NFSERR_STALE, 270 NFSERR_BADHANDLE, 271 NFSERR_SERVERFAULT, 272 0, 273 }; 274 275 static short nfsv3err_readlink[] = { 276 NFSERR_IO, 277 NFSERR_IO, 278 NFSERR_ACCES, 279 NFSERR_INVAL, 280 NFSERR_STALE, 281 NFSERR_BADHANDLE, 282 NFSERR_NOTSUPP, 283 NFSERR_SERVERFAULT, 284 0, 285 }; 286 287 static short nfsv3err_read[] = { 288 NFSERR_IO, 289 NFSERR_IO, 290 NFSERR_NXIO, 291 NFSERR_ACCES, 292 NFSERR_INVAL, 293 NFSERR_STALE, 294 NFSERR_BADHANDLE, 295 NFSERR_SERVERFAULT, 296 0, 297 }; 298 299 static short nfsv3err_write[] = { 300 NFSERR_IO, 301 NFSERR_IO, 302 NFSERR_ACCES, 303 NFSERR_INVAL, 304 NFSERR_FBIG, 305 NFSERR_NOSPC, 306 NFSERR_ROFS, 307 NFSERR_DQUOT, 308 NFSERR_STALE, 309 NFSERR_BADHANDLE, 310 NFSERR_SERVERFAULT, 311 0, 312 }; 313 314 static short nfsv3err_create[] = { 315 NFSERR_IO, 316 NFSERR_IO, 317 NFSERR_ACCES, 318 NFSERR_EXIST, 319 NFSERR_NOTDIR, 320 NFSERR_NOSPC, 321 NFSERR_ROFS, 322 NFSERR_NAMETOL, 323 NFSERR_DQUOT, 324 NFSERR_STALE, 325 NFSERR_BADHANDLE, 326 NFSERR_NOTSUPP, 327 NFSERR_SERVERFAULT, 328 0, 329 }; 330 331 static short nfsv3err_mkdir[] = { 332 NFSERR_IO, 333 NFSERR_IO, 334 NFSERR_ACCES, 335 NFSERR_EXIST, 336 NFSERR_NOTDIR, 337 NFSERR_NOSPC, 338 NFSERR_ROFS, 339 NFSERR_NAMETOL, 340 NFSERR_DQUOT, 341 NFSERR_STALE, 342 NFSERR_BADHANDLE, 343 NFSERR_NOTSUPP, 344 NFSERR_SERVERFAULT, 345 0, 346 }; 347 348 static short nfsv3err_symlink[] = { 349 NFSERR_IO, 350 NFSERR_IO, 351 NFSERR_ACCES, 352 NFSERR_EXIST, 353 NFSERR_NOTDIR, 354 NFSERR_NOSPC, 355 NFSERR_ROFS, 356 NFSERR_NAMETOL, 357 NFSERR_DQUOT, 358 NFSERR_STALE, 359 NFSERR_BADHANDLE, 360 NFSERR_NOTSUPP, 361 NFSERR_SERVERFAULT, 362 0, 363 }; 364 365 static short nfsv3err_mknod[] = { 366 NFSERR_IO, 367 NFSERR_IO, 368 NFSERR_ACCES, 369 NFSERR_EXIST, 370 NFSERR_NOTDIR, 371 NFSERR_NOSPC, 372 NFSERR_ROFS, 373 NFSERR_NAMETOL, 374 NFSERR_DQUOT, 375 NFSERR_STALE, 376 NFSERR_BADHANDLE, 377 NFSERR_NOTSUPP, 378 NFSERR_SERVERFAULT, 379 NFSERR_BADTYPE, 380 0, 381 }; 382 383 static short nfsv3err_remove[] = { 384 NFSERR_IO, 385 NFSERR_NOENT, 386 NFSERR_IO, 387 NFSERR_ACCES, 388 NFSERR_NOTDIR, 389 NFSERR_ROFS, 390 NFSERR_NAMETOL, 391 NFSERR_STALE, 392 NFSERR_BADHANDLE, 393 NFSERR_SERVERFAULT, 394 0, 395 }; 396 397 static short nfsv3err_rmdir[] = { 398 NFSERR_IO, 399 NFSERR_NOENT, 400 NFSERR_IO, 401 NFSERR_ACCES, 402 NFSERR_EXIST, 403 NFSERR_NOTDIR, 404 NFSERR_INVAL, 405 NFSERR_ROFS, 406 NFSERR_NAMETOL, 407 NFSERR_NOTEMPTY, 408 NFSERR_STALE, 409 NFSERR_BADHANDLE, 410 NFSERR_NOTSUPP, 411 NFSERR_SERVERFAULT, 412 0, 413 }; 414 415 static short nfsv3err_rename[] = { 416 NFSERR_IO, 417 NFSERR_NOENT, 418 NFSERR_IO, 419 NFSERR_ACCES, 420 NFSERR_EXIST, 421 NFSERR_XDEV, 422 NFSERR_NOTDIR, 423 NFSERR_ISDIR, 424 NFSERR_INVAL, 425 NFSERR_NOSPC, 426 NFSERR_ROFS, 427 NFSERR_MLINK, 428 NFSERR_NAMETOL, 429 NFSERR_NOTEMPTY, 430 NFSERR_DQUOT, 431 NFSERR_STALE, 432 NFSERR_BADHANDLE, 433 NFSERR_NOTSUPP, 434 NFSERR_SERVERFAULT, 435 0, 436 }; 437 438 static short nfsv3err_link[] = { 439 NFSERR_IO, 440 NFSERR_IO, 441 NFSERR_ACCES, 442 NFSERR_EXIST, 443 NFSERR_XDEV, 444 NFSERR_NOTDIR, 445 NFSERR_INVAL, 446 NFSERR_NOSPC, 447 NFSERR_ROFS, 448 NFSERR_MLINK, 449 NFSERR_NAMETOL, 450 NFSERR_DQUOT, 451 NFSERR_STALE, 452 NFSERR_BADHANDLE, 453 NFSERR_NOTSUPP, 454 NFSERR_SERVERFAULT, 455 0, 456 }; 457 458 static short nfsv3err_readdir[] = { 459 NFSERR_IO, 460 NFSERR_IO, 461 NFSERR_ACCES, 462 NFSERR_NOTDIR, 463 NFSERR_STALE, 464 NFSERR_BADHANDLE, 465 NFSERR_BAD_COOKIE, 466 NFSERR_TOOSMALL, 467 NFSERR_SERVERFAULT, 468 0, 469 }; 470 471 static short nfsv3err_readdirplus[] = { 472 NFSERR_IO, 473 NFSERR_IO, 474 NFSERR_ACCES, 475 NFSERR_NOTDIR, 476 NFSERR_STALE, 477 NFSERR_BADHANDLE, 478 NFSERR_BAD_COOKIE, 479 NFSERR_NOTSUPP, 480 NFSERR_TOOSMALL, 481 NFSERR_SERVERFAULT, 482 0, 483 }; 484 485 static short nfsv3err_fsstat[] = { 486 NFSERR_IO, 487 NFSERR_IO, 488 NFSERR_STALE, 489 NFSERR_BADHANDLE, 490 NFSERR_SERVERFAULT, 491 0, 492 }; 493 494 static short nfsv3err_fsinfo[] = { 495 NFSERR_STALE, 496 NFSERR_STALE, 497 NFSERR_BADHANDLE, 498 NFSERR_SERVERFAULT, 499 0, 500 }; 501 502 static short nfsv3err_pathconf[] = { 503 NFSERR_STALE, 504 NFSERR_STALE, 505 NFSERR_BADHANDLE, 506 NFSERR_SERVERFAULT, 507 0, 508 }; 509 510 static short nfsv3err_commit[] = { 511 NFSERR_IO, 512 NFSERR_IO, 513 NFSERR_STALE, 514 NFSERR_BADHANDLE, 515 NFSERR_SERVERFAULT, 516 0, 517 }; 518 519 static short *nfsrv_v3errmap[] = { 520 nfsv3err_null, 521 nfsv3err_getattr, 522 nfsv3err_setattr, 523 nfsv3err_lookup, 524 nfsv3err_access, 525 nfsv3err_readlink, 526 nfsv3err_read, 527 nfsv3err_write, 528 nfsv3err_create, 529 nfsv3err_mkdir, 530 nfsv3err_symlink, 531 nfsv3err_mknod, 532 nfsv3err_remove, 533 nfsv3err_rmdir, 534 nfsv3err_rename, 535 nfsv3err_link, 536 nfsv3err_readdir, 537 nfsv3err_readdirplus, 538 nfsv3err_fsstat, 539 nfsv3err_fsinfo, 540 nfsv3err_pathconf, 541 nfsv3err_commit, 542 }; 543 544 #endif /* NFS_NOSERVER */ 545 546 struct nfssvc_args; 547 extern int sys_nfssvc(struct proc *, struct nfssvc_args *, int *); 548 549 /* 550 * This needs to return a monotonically increasing or close to monotonically 551 * increasing result, otherwise the write gathering queues won't work 552 * properly. 553 */ 554 u_quad_t 555 nfs_curusec(void) 556 { 557 struct timeval tv; 558 559 getmicrouptime(&tv); 560 return ((u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec); 561 } 562 563 /* 564 * Called once to initialize data structures... 565 */ 566 int 567 nfs_init(struct vfsconf *vfsp) 568 { 569 callout_init_mp(&nfs_timer_handle); 570 nfsmount_objcache = objcache_create_simple(M_NFSMOUNT, sizeof(struct nfsmount)); 571 572 nfs_mount_type = vfsp->vfc_typenum; 573 nfsrtt.pos = 0; 574 rpc_vers = txdr_unsigned(RPC_VER2); 575 rpc_call = txdr_unsigned(RPC_CALL); 576 rpc_reply = txdr_unsigned(RPC_REPLY); 577 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 578 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 579 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 580 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 581 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 582 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 583 nfs_prog = txdr_unsigned(NFS_PROG); 584 nfs_true = txdr_unsigned(TRUE); 585 nfs_false = txdr_unsigned(FALSE); 586 nfs_xdrneg1 = txdr_unsigned(-1); 587 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 588 if (nfs_ticks < 1) 589 nfs_ticks = 1; 590 nfs_nhinit(); /* Init the nfsnode table */ 591 #ifndef NFS_NOSERVER 592 nfsrv_init(0); /* Init server data structures */ 593 nfsrv_initcache(); /* Init the server request cache */ 594 #endif 595 596 /* 597 * Mainly for vkernel operation. If memory is severely limited 598 */ 599 if (nfs_maxasyncbio > nmbclusters * MCLBYTES / NFS_MAXDATA / 3) 600 nfs_maxasyncbio = nmbclusters * MCLBYTES / NFS_MAXDATA / 3; 601 if (nfs_maxasyncbio < 4) 602 nfs_maxasyncbio = 4; 603 604 /* 605 * Initialize reply list and start timer 606 */ 607 nfs_timer_callout(0); 608 609 nfs_prev_nfssvc_sy_narg = sysent[SYS_nfssvc].sy_narg; 610 sysent[SYS_nfssvc].sy_narg = 2; 611 nfs_prev_nfssvc_sy_call = sysent[SYS_nfssvc].sy_call; 612 sysent[SYS_nfssvc].sy_call = (sy_call_t *)sys_nfssvc; 613 614 nfs_pbuf_freecnt = nswbuf_kva / 2 + 1; 615 616 return (0); 617 } 618 619 int 620 nfs_uninit(struct vfsconf *vfsp) 621 { 622 callout_stop(&nfs_timer_handle); 623 nfs_mount_type = -1; 624 sysent[SYS_nfssvc].sy_narg = nfs_prev_nfssvc_sy_narg; 625 sysent[SYS_nfssvc].sy_call = nfs_prev_nfssvc_sy_call; 626 return (0); 627 } 628 629 /* 630 * Attribute cache routines. 631 * nfs_loadattrcache() - loads or updates the cache contents from attributes 632 * that are on the mbuf list 633 * nfs_getattrcache() - returns valid attributes if found in cache, returns 634 * error otherwise 635 */ 636 637 /* 638 * Load the attribute cache (that lives in the nfsnode entry) with 639 * the values on the mbuf list. Load *vaper with the attributes. vaper 640 * may be NULL. 641 * 642 * As a side effect n_mtime, which we use to determine if the file was 643 * modified by some other host, is set to the attribute timestamp and 644 * NRMODIFIED is set if the two values differ. 645 * 646 * WARNING: the mtime loaded into vaper does not necessarily represent 647 * n_mtime or n_attr.mtime due to NACC and NUPD. 648 */ 649 int 650 nfs_loadattrcache(struct vnode *vp, struct mbuf **mdp, caddr_t *dposp, 651 struct vattr *vaper, int lattr_flags) 652 { 653 struct vattr *vap; 654 struct nfs_fattr *fp; 655 struct nfsnode *np; 656 int32_t t1; 657 caddr_t cp2; 658 int error = 0; 659 int rmajor, rminor; 660 udev_t rdev; 661 struct mbuf *md; 662 enum vtype vtyp; 663 u_short vmode; 664 struct timespec mtime; 665 int v3 = NFS_ISV3(vp); 666 667 md = *mdp; 668 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 669 if ((error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) != 0) 670 return (error); 671 fp = (struct nfs_fattr *)cp2; 672 if (v3) { 673 vtyp = nfsv3tov_type(fp->fa_type); 674 vmode = fxdr_unsigned(u_short, fp->fa_mode); 675 rmajor = (int)fxdr_unsigned(int, fp->fa3_rdev.specdata1); 676 rminor = (int)fxdr_unsigned(int, fp->fa3_rdev.specdata2); 677 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 678 } else { 679 vtyp = nfsv2tov_type(fp->fa_type); 680 vmode = fxdr_unsigned(u_short, fp->fa_mode); 681 /* 682 * XXX 683 * 684 * The duplicate information returned in fa_type and fa_mode 685 * is an ambiguity in the NFS version 2 protocol. 686 * 687 * VREG should be taken literally as a regular file. If a 688 * server intents to return some type information differently 689 * in the upper bits of the mode field (e.g. for sockets, or 690 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 691 * leave the examination of the mode bits even in the VREG 692 * case to avoid breakage for bogus servers, but we make sure 693 * that there are actually type bits set in the upper part of 694 * fa_mode (and failing that, trust the va_type field). 695 * 696 * NFSv3 cleared the issue, and requires fa_mode to not 697 * contain any type information (while also introduing sockets 698 * and FIFOs for fa_type). 699 */ 700 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 701 vtyp = IFTOVT(vmode); 702 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 703 rmajor = umajor(rdev); 704 rminor = uminor(rdev); 705 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 706 707 /* 708 * Really ugly NFSv2 kludge. 709 */ 710 if (vtyp == VCHR && rdev == (udev_t)0xffffffff) 711 vtyp = VFIFO; 712 } 713 714 /* 715 * If v_type == VNON it is a new node, so fill in the v_type, 716 * n_mtime fields. Check to see if it represents a special 717 * device, and if so, check for a possible alias. Once the 718 * correct vnode has been obtained, fill in the rest of the 719 * information. 720 */ 721 np = VTONFS(vp); 722 if (vp->v_type != vtyp) { 723 nfs_setvtype(vp, vtyp); 724 if (vp->v_type == VFIFO) { 725 vp->v_ops = &vp->v_mount->mnt_vn_fifo_ops; 726 } else if (vp->v_type == VCHR || vp->v_type == VBLK) { 727 vp->v_ops = &vp->v_mount->mnt_vn_spec_ops; 728 addaliasu(vp, rmajor, rminor); 729 } else { 730 vp->v_ops = &vp->v_mount->mnt_vn_use_ops; 731 } 732 np->n_mtime = mtime.tv_sec; 733 } else if (np->n_mtime != mtime.tv_sec) { 734 /* 735 * If we haven't modified the file locally and the server 736 * timestamp does not match, then the server probably 737 * modified the file. We must flag this condition so 738 * the proper syncnronization can be done. We do not 739 * try to synchronize the state here because that 740 * could lead to an endless recursion. 741 * 742 * XXX loadattrcache can be set during the reply to a write, 743 * before the write timestamp is properly processed. To 744 * avoid unconditionally setting the rmodified bit (which 745 * has the effect of flushing the cache), we only do this 746 * check if the lmodified bit is not set. 747 */ 748 np->n_mtime = mtime.tv_sec; 749 if ((lattr_flags & NFS_LATTR_NOMTIMECHECK) == 0) 750 np->n_flag |= NRMODIFIED; 751 } 752 vap = &np->n_vattr; 753 vap->va_type = vtyp; 754 vap->va_mode = (vmode & 07777); 755 vap->va_rmajor = rmajor; 756 vap->va_rminor = rminor; 757 vap->va_mtime = mtime; 758 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 759 if (v3) { 760 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 761 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 762 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 763 vap->va_size = fxdr_hyper(&fp->fa3_size); 764 vap->va_blocksize = NFS_FABLKSIZE; 765 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 766 vap->va_fileid = fxdr_hyper(&fp->fa3_fileid); 767 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 768 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 769 vap->va_flags = 0; 770 vap->va_filerev = 0; 771 } else { 772 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 773 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 774 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 775 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 776 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); 777 vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) 778 * NFS_FABLKSIZE; 779 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 780 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 781 vap->va_flags = 0; 782 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 783 fp->fa2_ctime.nfsv2_sec); 784 vap->va_ctime.tv_nsec = 0; 785 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 786 vap->va_filerev = 0; 787 } 788 np->n_attrstamp = time_uptime; 789 if (vap->va_size != np->n_size) { 790 if (vap->va_type == VREG) { 791 /* 792 * Get rid of all the junk we had before and just 793 * set NRMODIFIED if NLMODIFIED is 0. Depend on 794 * occassionally flushing our dirty buffers to 795 * clear both the NLMODIFIED and NRMODIFIED flags. 796 */ 797 if ((np->n_flag & NLMODIFIED) == 0) 798 np->n_flag |= NRMODIFIED; 799 #if 0 800 if ((lattr_flags & NFS_LATTR_NOSHRINK) && 801 vap->va_size < np->n_size) { 802 /* 803 * We've been told not to shrink the file; 804 * zero np->n_attrstamp to indicate that 805 * the attributes are stale. 806 * 807 * This occurs primarily due to recursive 808 * NFS ops that are executed during periods 809 * where we cannot safely reduce the size of 810 * the file. 811 * 812 * Additionally, write rpcs are broken down 813 * into buffers and np->n_size is 814 * pre-extended. Setting NRMODIFIED here 815 * can result in n_size getting reset to a 816 * lower value, which is NOT what we want. 817 * XXX this needs to be cleaned up a lot 818 * more. 819 */ 820 vap->va_size = np->n_size; 821 np->n_attrstamp = 0; 822 if ((np->n_flag & NLMODIFIED) == 0) 823 np->n_flag |= NRMODIFIED; 824 } else if (np->n_flag & NLMODIFIED) { 825 /* 826 * We've modified the file: Use the larger 827 * of our size, and the server's size. At 828 * this point the cache coherency is all 829 * shot to hell. To try to handle multiple 830 * clients appending to the file at the same 831 * time mark that the server has changed 832 * the file if the server's notion of the 833 * file size is larger then our notion. 834 * 835 * XXX this needs work. 836 */ 837 if (vap->va_size < np->n_size) { 838 vap->va_size = np->n_size; 839 } else { 840 np->n_size = vap->va_size; 841 np->n_flag |= NRMODIFIED; 842 } 843 } else { 844 /* 845 * Someone changed the file's size on the 846 * server and there are no local changes 847 * to get in the way, set the size and mark 848 * it. 849 */ 850 np->n_size = vap->va_size; 851 np->n_flag |= NRMODIFIED; 852 } 853 nvnode_pager_setsize(vp, np->n_size, XXX); 854 #endif 855 } else { 856 np->n_size = vap->va_size; 857 } 858 } 859 if (vaper != NULL) { 860 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 861 if (np->n_flag & NCHG) { 862 if (np->n_flag & NACC) 863 vaper->va_atime = np->n_atim; 864 if (np->n_flag & NUPD) 865 vaper->va_mtime = np->n_mtim; 866 } 867 } 868 return (0); 869 } 870 871 #ifdef NFS_ACDEBUG 872 #include <sys/sysctl.h> 873 SYSCTL_DECL(_vfs_nfs); 874 static int nfs_acdebug; 875 SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, ""); 876 #endif 877 878 /* 879 * Check the time stamp 880 * If the cache is valid, copy contents to *vap and return 0 881 * otherwise return an error 882 */ 883 int 884 nfs_getattrcache(struct vnode *vp, struct vattr *vaper) 885 { 886 struct nfsnode *np; 887 struct vattr *vap; 888 struct nfsmount *nmp; 889 int timeo; 890 891 np = VTONFS(vp); 892 vap = &np->n_vattr; 893 nmp = VFSTONFS(vp->v_mount); 894 895 /* 896 * Dynamic timeout based on how recently the file was modified. 897 * n_mtime is always valid. 898 */ 899 timeo = (get_approximate_time_t() - np->n_mtime) / 60; 900 901 #ifdef NFS_ACDEBUG 902 if (nfs_acdebug>1) 903 kprintf("nfs_getattrcache: initial timeo = %d\n", timeo); 904 #endif 905 906 if (vap->va_type == VDIR) { 907 if ((np->n_flag & NLMODIFIED) || timeo < nmp->nm_acdirmin) 908 timeo = nmp->nm_acdirmin; 909 else if (timeo > nmp->nm_acdirmax) 910 timeo = nmp->nm_acdirmax; 911 } else { 912 if ((np->n_flag & NLMODIFIED) || timeo < nmp->nm_acregmin) 913 timeo = nmp->nm_acregmin; 914 else if (timeo > nmp->nm_acregmax) 915 timeo = nmp->nm_acregmax; 916 } 917 918 #ifdef NFS_ACDEBUG 919 if (nfs_acdebug > 2) 920 kprintf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n", 921 nmp->nm_acregmin, nmp->nm_acregmax, 922 nmp->nm_acdirmin, nmp->nm_acdirmax); 923 924 if (nfs_acdebug) 925 kprintf("nfs_getattrcache: age = %d; final timeo = %d\n", 926 (int)(time_uptime - np->n_attrstamp), timeo); 927 #endif 928 929 if (np->n_attrstamp == 0 || (time_uptime - np->n_attrstamp) >= timeo) { 930 nfsstats.attrcache_misses++; 931 return (ENOENT); 932 } 933 nfsstats.attrcache_hits++; 934 935 /* 936 * Our attribute cache can be stale due to modifications made on 937 * this host. XXX this is a bad hack. We need a more deterministic 938 * means of finding out which np fields are valid verses attr cache 939 * fields. We really should update the vattr info on the fly when 940 * making local changes. 941 */ 942 if (vap->va_size != np->n_size) { 943 if (vap->va_type == VREG) { 944 if (np->n_flag & NLMODIFIED) 945 vap->va_size = np->n_size; 946 nfs_meta_setsize(vp, curthread, vap->va_size, 0); 947 } else { 948 np->n_size = vap->va_size; 949 } 950 } 951 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 952 if (np->n_flag & NCHG) { 953 if (np->n_flag & NACC) 954 vaper->va_atime = np->n_atim; 955 if (np->n_flag & NUPD) 956 vaper->va_mtime = np->n_mtim; 957 } 958 return (0); 959 } 960 961 #ifndef NFS_NOSERVER 962 963 /* 964 * Set up nameidata for a lookup() call and do it. 965 * 966 * If pubflag is set, this call is done for a lookup operation on the 967 * public filehandle. In that case we allow crossing mountpoints and 968 * absolute pathnames. However, the caller is expected to check that 969 * the lookup result is within the public fs, and deny access if 970 * it is not. 971 * 972 * dirp may be set whether an error is returned or not, and must be 973 * released by the caller. 974 * 975 * On return nd->nl_nch usually points to the target ncp, which may represent 976 * a negative hit. 977 * 978 * NOTE: the caller must call nlookup_done(nd) unconditionally on return 979 * to cleanup. 980 */ 981 int 982 nfs_namei(struct nlookupdata *nd, struct ucred *cred, int nflags, 983 struct vnode **dvpp, struct vnode **vpp, 984 fhandle_t *fhp, int len, 985 struct nfssvc_sock *slp, struct sockaddr *nam, struct mbuf **mdp, 986 caddr_t *dposp, struct vnode **dirpp, struct thread *td, 987 int kerbflag, int pubflag) 988 { 989 int i, rem; 990 struct mbuf *md; 991 char *fromcp, *tocp, *cp; 992 char *namebuf; 993 struct nchandle nch; 994 struct vnode *dp; 995 struct mount *mp; 996 int error, rdonly; 997 998 namebuf = objcache_get(namei_oc, M_WAITOK); 999 *dirpp = NULL; 1000 1001 /* 1002 * Copy the name from the mbuf list to namebuf. 1003 */ 1004 fromcp = *dposp; 1005 tocp = namebuf; 1006 md = *mdp; 1007 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1008 for (i = 0; i < len; i++) { 1009 while (rem == 0) { 1010 md = md->m_next; 1011 if (md == NULL) { 1012 error = EBADRPC; 1013 goto out; 1014 } 1015 fromcp = mtod(md, caddr_t); 1016 rem = md->m_len; 1017 } 1018 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1019 error = EACCES; 1020 goto out; 1021 } 1022 *tocp++ = *fromcp++; 1023 rem--; 1024 } 1025 *tocp = '\0'; 1026 *mdp = md; 1027 *dposp = fromcp; 1028 len = nfsm_rndup(len)-len; 1029 if (len > 0) { 1030 if (rem >= len) 1031 *dposp += len; 1032 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1033 goto out; 1034 } 1035 1036 /* 1037 * Extract and set starting directory. The returned dp is refd 1038 * but not locked. 1039 */ 1040 error = nfsrv_fhtovp(fhp, FALSE, &mp, &dp, cred, slp, 1041 nam, &rdonly, kerbflag, pubflag); 1042 if (error) 1043 goto out; 1044 if (dp->v_type != VDIR) { 1045 vrele(dp); 1046 error = ENOTDIR; 1047 goto out; 1048 } 1049 1050 /* 1051 * Set return directory. Reference to dp is implicitly transfered 1052 * to the returned pointer. This must be set before we potentially 1053 * goto out below. 1054 */ 1055 *dirpp = dp; 1056 1057 /* 1058 * read-only - NLC_DELETE, NLC_RENAME_DST are disallowed. NLC_CREATE 1059 * is passed through to nlookup() and will be disallowed 1060 * if the file does not already exist. 1061 */ 1062 if (rdonly) { 1063 nflags |= NLC_NFS_RDONLY; 1064 if (nflags & (NLC_DELETE | NLC_RENAME_DST)) { 1065 error = EROFS; 1066 goto out; 1067 } 1068 } 1069 1070 /* 1071 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1072 * and the 'native path' indicator. 1073 */ 1074 if (pubflag) { 1075 cp = objcache_get(namei_oc, M_WAITOK); 1076 fromcp = namebuf; 1077 tocp = cp; 1078 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1079 switch ((unsigned char)*fromcp) { 1080 case WEBNFS_NATIVE_CHAR: 1081 /* 1082 * 'Native' path for us is the same 1083 * as a path according to the NFS spec, 1084 * just skip the escape char. 1085 */ 1086 fromcp++; 1087 break; 1088 /* 1089 * More may be added in the future, range 0x80-0xff 1090 */ 1091 default: 1092 error = EIO; 1093 objcache_put(namei_oc, cp); 1094 goto out; 1095 } 1096 } 1097 /* 1098 * Translate the '%' escapes, URL-style. 1099 */ 1100 while (*fromcp != '\0') { 1101 if (*fromcp == WEBNFS_ESC_CHAR) { 1102 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1103 fromcp++; 1104 *tocp++ = HEXSTRTOI(fromcp); 1105 fromcp += 2; 1106 continue; 1107 } else { 1108 error = ENOENT; 1109 objcache_put(namei_oc, cp); 1110 goto out; 1111 } 1112 } else 1113 *tocp++ = *fromcp++; 1114 } 1115 *tocp = '\0'; 1116 objcache_put(namei_oc, namebuf); 1117 namebuf = cp; 1118 } 1119 1120 /* 1121 * Setup for search. We need to get a start directory from dp. Note 1122 * that dp is ref'd, but we no longer 'own' the ref (*dirpp owns it). 1123 */ 1124 if (pubflag == 0) { 1125 nflags |= NLC_NFS_NOSOFTLINKTRAV; 1126 nflags |= NLC_NOCROSSMOUNT; 1127 } 1128 1129 /* 1130 * We need a starting ncp from the directory vnode dp. dp must not 1131 * be locked. The returned ncp will be refd but not locked. 1132 * 1133 * If no suitable ncp is found we instruct cache_fromdvp() to create 1134 * one. If this fails the directory has probably been removed while 1135 * the target was chdir'd into it and any further lookup will fail. 1136 */ 1137 if ((error = cache_fromdvp(dp, cred, 1, &nch)) != 0) 1138 goto out; 1139 nlookup_init_raw(nd, namebuf, UIO_SYSSPACE, nflags, cred, &nch); 1140 cache_drop(&nch); 1141 1142 /* 1143 * Ok, do the lookup. 1144 */ 1145 error = nlookup(nd); 1146 1147 /* 1148 * If no error occured return the requested dvpp and vpp. If 1149 * NLC_CREATE was specified nd->nl_nch may represent a negative 1150 * cache hit in which case we do not attempt to obtain the vp. 1151 */ 1152 if (error == 0) { 1153 if (dvpp) { 1154 if (nd->nl_nch.ncp->nc_parent) { 1155 nch = nd->nl_nch; 1156 nch.ncp = nch.ncp->nc_parent; 1157 cache_hold(&nch); 1158 cache_lock(&nch); 1159 error = cache_vget(&nch, nd->nl_cred, 1160 LK_EXCLUSIVE, dvpp); 1161 cache_put(&nch); 1162 } else { 1163 error = ENXIO; 1164 } 1165 } 1166 if (vpp && nd->nl_nch.ncp->nc_vp) { 1167 error = cache_vget(&nd->nl_nch, nd->nl_cred, LK_EXCLUSIVE, vpp); 1168 } 1169 if (error) { 1170 if (dvpp && *dvpp) { 1171 vput(*dvpp); 1172 *dvpp = NULL; 1173 } 1174 if (vpp && *vpp) { 1175 vput(*vpp); 1176 *vpp = NULL; 1177 } 1178 } 1179 } 1180 1181 /* 1182 * Finish up. 1183 */ 1184 out: 1185 objcache_put(namei_oc, namebuf); 1186 return (error); 1187 } 1188 1189 /* 1190 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1191 * - look up fsid in mount list (if not found ret error) 1192 * - get vp and export rights by calling VFS_FHTOVP() 1193 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1194 * - if not lockflag unlock it with vn_unlock() 1195 */ 1196 int 1197 nfsrv_fhtovp(fhandle_t *fhp, int lockflag, 1198 struct mount **mpp, struct vnode **vpp, 1199 struct ucred *cred, struct nfssvc_sock *slp, struct sockaddr *nam, 1200 int *rdonlyp, int kerbflag, int pubflag) 1201 { 1202 struct mount *mp; 1203 int i; 1204 struct ucred *credanon; 1205 int error, exflags; 1206 #ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */ 1207 struct sockaddr_int *saddr; 1208 #endif 1209 1210 *vpp = NULL; 1211 *mpp = NULL; 1212 1213 if (nfs_ispublicfh(fhp)) { 1214 if (!pubflag || !nfs_pub.np_valid) 1215 return (ESTALE); 1216 fhp = &nfs_pub.np_handle; 1217 } 1218 1219 mp = *mpp = vfs_getvfs(&fhp->fh_fsid); 1220 if (mp == NULL) 1221 return (ESTALE); 1222 error = VFS_CHECKEXP(mp, nam, &exflags, &credanon); 1223 if (error) { 1224 mount_drop(mp); 1225 return (error); 1226 } 1227 error = VFS_FHTOVP(mp, NULL, &fhp->fh_fid, vpp); 1228 mount_drop(mp); 1229 if (error) 1230 return (ESTALE); 1231 #ifdef MNT_EXNORESPORT 1232 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 1233 saddr = (struct sockaddr_in *)nam; 1234 if (saddr->sin_family == AF_INET && 1235 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 1236 vput(*vpp); 1237 *vpp = NULL; 1238 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1239 } 1240 } 1241 #endif 1242 /* 1243 * Check/setup credentials. 1244 */ 1245 if (exflags & MNT_EXKERB) { 1246 if (!kerbflag) { 1247 vput(*vpp); 1248 *vpp = NULL; 1249 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1250 } 1251 } else if (kerbflag) { 1252 vput(*vpp); 1253 *vpp = NULL; 1254 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1255 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1256 cred->cr_uid = credanon->cr_uid; 1257 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1258 cred->cr_groups[i] = credanon->cr_groups[i]; 1259 cred->cr_ngroups = i; 1260 } 1261 if (exflags & MNT_EXRDONLY) 1262 *rdonlyp = 1; 1263 else 1264 *rdonlyp = 0; 1265 1266 if (!lockflag) 1267 vn_unlock(*vpp); 1268 return (0); 1269 } 1270 1271 /* 1272 * WebNFS: check if a filehandle is a public filehandle. For v3, this 1273 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 1274 * transformed this to all zeroes in both cases, so check for it. 1275 */ 1276 int 1277 nfs_ispublicfh(fhandle_t *fhp) 1278 { 1279 char *cp = (char *)fhp; 1280 int i; 1281 1282 for (i = 0; i < NFSX_V3FH; i++) 1283 if (*cp++ != 0) 1284 return (FALSE); 1285 return (TRUE); 1286 } 1287 1288 #endif /* NFS_NOSERVER */ 1289 /* 1290 * This function compares two net addresses by family and returns TRUE 1291 * if they are the same host. 1292 * If there is any doubt, return FALSE. 1293 * The AF_INET family is handled as a special case so that address mbufs 1294 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1295 */ 1296 int 1297 netaddr_match(int family, union nethostaddr *haddr, struct sockaddr *nam) 1298 { 1299 struct sockaddr_in *inetaddr; 1300 1301 switch (family) { 1302 case AF_INET: 1303 inetaddr = (struct sockaddr_in *)nam; 1304 if (inetaddr->sin_family == AF_INET && 1305 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1306 return (1); 1307 break; 1308 default: 1309 break; 1310 } 1311 return (0); 1312 } 1313 1314 static nfsuint64 nfs_nullcookie = { { 0, 0 } }; 1315 /* 1316 * This function finds the directory cookie that corresponds to the 1317 * logical byte offset given. 1318 */ 1319 nfsuint64 * 1320 nfs_getcookie(struct nfsnode *np, off_t off, int add) 1321 { 1322 struct nfsdmap *dp, *dp2; 1323 int pos; 1324 1325 pos = (uoff_t)off / NFS_DIRBLKSIZ; 1326 if (pos == 0 || off < 0) { 1327 #ifdef DIAGNOSTIC 1328 if (add) 1329 panic("nfs getcookie add at <= 0"); 1330 #endif 1331 return (&nfs_nullcookie); 1332 } 1333 pos--; 1334 dp = np->n_cookies.lh_first; 1335 if (!dp) { 1336 if (add) { 1337 dp = kmalloc(sizeof(struct nfsdmap), M_NFSDIROFF, 1338 M_WAITOK); 1339 dp->ndm_eocookie = 0; 1340 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 1341 } else 1342 return (NULL); 1343 } 1344 while (pos >= NFSNUMCOOKIES) { 1345 pos -= NFSNUMCOOKIES; 1346 if (dp->ndm_list.le_next) { 1347 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 1348 pos >= dp->ndm_eocookie) 1349 return (NULL); 1350 dp = dp->ndm_list.le_next; 1351 } else if (add) { 1352 dp2 = kmalloc(sizeof(struct nfsdmap), M_NFSDIROFF, 1353 M_WAITOK); 1354 dp2->ndm_eocookie = 0; 1355 LIST_INSERT_AFTER(dp, dp2, ndm_list); 1356 dp = dp2; 1357 } else 1358 return (NULL); 1359 } 1360 if (pos >= dp->ndm_eocookie) { 1361 if (add) 1362 dp->ndm_eocookie = pos + 1; 1363 else 1364 return (NULL); 1365 } 1366 return (&dp->ndm_cookies[pos]); 1367 } 1368 1369 /* 1370 * Invalidate cached directory information, except for the actual directory 1371 * blocks (which are invalidated separately). 1372 * Done mainly to avoid the use of stale offset cookies. 1373 */ 1374 void 1375 nfs_invaldir(struct vnode *vp) 1376 { 1377 struct nfsnode *np = VTONFS(vp); 1378 1379 #ifdef DIAGNOSTIC 1380 if (vp->v_type != VDIR) 1381 panic("nfs: invaldir not dir"); 1382 #endif 1383 np->n_direofoffset = 0; 1384 np->n_cookieverf.nfsuquad[0] = 0; 1385 np->n_cookieverf.nfsuquad[1] = 0; 1386 if (np->n_cookies.lh_first) 1387 np->n_cookies.lh_first->ndm_eocookie = 0; 1388 } 1389 1390 /* 1391 * Set the v_type field for an NFS client's vnode and initialize for 1392 * buffer cache operations if necessary. 1393 */ 1394 void 1395 nfs_setvtype(struct vnode *vp, enum vtype vtyp) 1396 { 1397 vp->v_type = vtyp; 1398 1399 switch(vtyp) { 1400 case VREG: 1401 case VDIR: 1402 case VLNK: 1403 /* 1404 * Needs VMIO, size not yet known, and blocksize 1405 * is not really relevant if we are passing a 1406 * filesize of 0. 1407 */ 1408 vinitvmio(vp, 0, PAGE_SIZE, -1); 1409 break; 1410 default: 1411 break; 1412 } 1413 } 1414 1415 /* 1416 * The write verifier has changed (probably due to a server reboot), so all 1417 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 1418 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 1419 * and B_CLUSTEROK flags. Once done the new write verifier can be set for the 1420 * mount point. 1421 * 1422 * B_CLUSTEROK must be cleared along with B_NEEDCOMMIT because stage 1 data 1423 * writes are not clusterable. 1424 */ 1425 1426 static int nfs_clearcommit_bp(struct buf *bp, void *data __unused); 1427 static int nfs_clearcommit_callback(struct mount *mp, struct vnode *vp, 1428 void *data __unused); 1429 1430 void 1431 nfs_clearcommit(struct mount *mp) 1432 { 1433 vsyncscan(mp, VMSC_NOWAIT, nfs_clearcommit_callback, NULL); 1434 } 1435 1436 static int 1437 nfs_clearcommit_callback(struct mount *mp, struct vnode *vp, 1438 void *data __unused) 1439 { 1440 lwkt_gettoken(&vp->v_token); 1441 RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL, 1442 nfs_clearcommit_bp, NULL); 1443 lwkt_reltoken(&vp->v_token); 1444 1445 return(0); 1446 } 1447 1448 static int 1449 nfs_clearcommit_bp(struct buf *bp, void *data __unused) 1450 { 1451 if (BUF_LOCKINUSE(bp) == 0 && 1452 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) 1453 == (B_DELWRI | B_NEEDCOMMIT)) { 1454 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 1455 } 1456 return(0); 1457 } 1458 1459 #ifndef NFS_NOSERVER 1460 /* 1461 * Map errnos to NFS error numbers. For Version 3 also filter out error 1462 * numbers not specified for the associated procedure. 1463 */ 1464 int 1465 nfsrv_errmap(struct nfsrv_descript *nd, int err) 1466 { 1467 short *defaulterrp, *errp; 1468 1469 if (nd->nd_flag & ND_NFSV3) { 1470 if (nd->nd_procnum <= NFSPROC_COMMIT) { 1471 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 1472 while (*++errp) { 1473 if (*errp == err) 1474 return (err); 1475 else if (*errp > err) 1476 break; 1477 } 1478 return ((int)*defaulterrp); 1479 } else 1480 return (err & 0xffff); 1481 } 1482 if (err <= ELAST) 1483 return ((int)nfsrv_v2errmap[err - 1]); 1484 return (NFSERR_IO); 1485 } 1486 1487 /* 1488 * Sort the group list in increasing numerical order. 1489 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 1490 * that used to be here.) 1491 */ 1492 void 1493 nfsrvw_sort(gid_t *list, int num) 1494 { 1495 int i, j; 1496 gid_t v; 1497 1498 /* Insertion sort. */ 1499 for (i = 1; i < num; i++) { 1500 v = list[i]; 1501 /* find correct slot for value v, moving others up */ 1502 for (j = i; --j >= 0 && v < list[j];) 1503 list[j + 1] = list[j]; 1504 list[j + 1] = v; 1505 } 1506 } 1507 1508 /* 1509 * copy credentials making sure that the result can be compared with bcmp(). 1510 */ 1511 void 1512 nfsrv_setcred(struct ucred *incred, struct ucred *outcred) 1513 { 1514 int i; 1515 1516 bzero((caddr_t)outcred, sizeof (struct ucred)); 1517 outcred->cr_ref = 1; 1518 outcred->cr_uid = incred->cr_uid; 1519 outcred->cr_ngroups = incred->cr_ngroups; 1520 for (i = 0; i < incred->cr_ngroups; i++) 1521 outcred->cr_groups[i] = incred->cr_groups[i]; 1522 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 1523 } 1524 #endif /* NFS_NOSERVER */ 1525