1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)nfs_subs.c 8.8 (Berkeley) 5/22/95 37 * $FreeBSD: /repoman/r/ncvs/src/sys/nfsclient/nfs_subs.c,v 1.128 2004/04/14 23:23:55 peadar Exp $ 38 * $DragonFly: src/sys/vfs/nfs/nfs_subs.c,v 1.48 2008/09/17 21:44:24 dillon Exp $ 39 */ 40 41 /* 42 * These functions support the macros and help fiddle mbuf chains for 43 * the nfs op functions. They do things like create the rpc header and 44 * copy data between mbuf chains and uio lists. 45 */ 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/kernel.h> 49 #include <sys/buf.h> 50 #include <sys/proc.h> 51 #include <sys/mount.h> 52 #include <sys/vnode.h> 53 #include <sys/nlookup.h> 54 #include <sys/namei.h> 55 #include <sys/mbuf.h> 56 #include <sys/socket.h> 57 #include <sys/stat.h> 58 #include <sys/malloc.h> 59 #include <sys/sysent.h> 60 #include <sys/syscall.h> 61 #include <sys/conf.h> 62 #include <sys/objcache.h> 63 64 #include <vm/vm.h> 65 #include <vm/vm_object.h> 66 #include <vm/vm_extern.h> 67 #include <vm/vm_zone.h> 68 69 #include <sys/buf2.h> 70 71 #include "rpcv2.h" 72 #include "nfsproto.h" 73 #include "nfs.h" 74 #include "nfsmount.h" 75 #include "nfsnode.h" 76 #include "xdr_subs.h" 77 #include "nfsm_subs.h" 78 #include "nfsrtt.h" 79 80 #include <netinet/in.h> 81 82 /* 83 * Data items converted to xdr at startup, since they are constant 84 * This is kinda hokey, but may save a little time doing byte swaps 85 */ 86 u_int32_t nfs_xdrneg1; 87 u_int32_t rpc_reply, rpc_msgdenied, rpc_mismatch, rpc_vers; 88 u_int32_t rpc_auth_unix, rpc_msgaccepted, rpc_call, rpc_autherr; 89 u_int32_t rpc_auth_kerb; 90 u_int32_t nfs_prog, nfs_true, nfs_false; 91 92 /* And other global data */ 93 static enum vtype nv2tov_type[8]= { 94 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON 95 }; 96 enum vtype nv3tov_type[8]= { 97 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO 98 }; 99 100 int nfs_ticks; 101 102 static int nfs_pbuf_freecnt = -1; /* start out unlimited */ 103 104 struct nfsmount_head nfs_mountq = TAILQ_HEAD_INITIALIZER(nfs_mountq); 105 struct nfssvc_sockhead nfssvc_sockhead; 106 int nfssvc_sockhead_flag; 107 struct nfsd_head nfsd_head; 108 int nfsd_head_flag; 109 struct nfs_bufq nfs_bufq; 110 struct nqfhhashhead *nqfhhashtbl; 111 u_long nqfhhash; 112 113 static int nfs_prev_nfssvc_sy_narg; 114 static sy_call_t *nfs_prev_nfssvc_sy_call; 115 116 #ifndef NFS_NOSERVER 117 118 /* 119 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 120 */ 121 int nfsv3_procid[NFS_NPROCS] = { 122 NFSPROC_NULL, 123 NFSPROC_GETATTR, 124 NFSPROC_SETATTR, 125 NFSPROC_NOOP, 126 NFSPROC_LOOKUP, 127 NFSPROC_READLINK, 128 NFSPROC_READ, 129 NFSPROC_NOOP, 130 NFSPROC_WRITE, 131 NFSPROC_CREATE, 132 NFSPROC_REMOVE, 133 NFSPROC_RENAME, 134 NFSPROC_LINK, 135 NFSPROC_SYMLINK, 136 NFSPROC_MKDIR, 137 NFSPROC_RMDIR, 138 NFSPROC_READDIR, 139 NFSPROC_FSSTAT, 140 NFSPROC_NOOP, 141 NFSPROC_NOOP, 142 NFSPROC_NOOP, 143 NFSPROC_NOOP, 144 NFSPROC_NOOP, 145 NFSPROC_NOOP, 146 NFSPROC_NOOP, 147 NFSPROC_NOOP 148 }; 149 150 #endif /* NFS_NOSERVER */ 151 /* 152 * and the reverse mapping from generic to Version 2 procedure numbers 153 */ 154 int nfsv2_procid[NFS_NPROCS] = { 155 NFSV2PROC_NULL, 156 NFSV2PROC_GETATTR, 157 NFSV2PROC_SETATTR, 158 NFSV2PROC_LOOKUP, 159 NFSV2PROC_NOOP, 160 NFSV2PROC_READLINK, 161 NFSV2PROC_READ, 162 NFSV2PROC_WRITE, 163 NFSV2PROC_CREATE, 164 NFSV2PROC_MKDIR, 165 NFSV2PROC_SYMLINK, 166 NFSV2PROC_CREATE, 167 NFSV2PROC_REMOVE, 168 NFSV2PROC_RMDIR, 169 NFSV2PROC_RENAME, 170 NFSV2PROC_LINK, 171 NFSV2PROC_READDIR, 172 NFSV2PROC_NOOP, 173 NFSV2PROC_STATFS, 174 NFSV2PROC_NOOP, 175 NFSV2PROC_NOOP, 176 NFSV2PROC_NOOP, 177 NFSV2PROC_NOOP, 178 NFSV2PROC_NOOP, 179 NFSV2PROC_NOOP, 180 NFSV2PROC_NOOP, 181 }; 182 183 #ifndef NFS_NOSERVER 184 /* 185 * Maps errno values to nfs error numbers. 186 * Use NFSERR_IO as the catch all for ones not specifically defined in 187 * RFC 1094. 188 */ 189 static u_char nfsrv_v2errmap[ELAST] = { 190 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 191 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 192 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 193 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 194 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 195 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 196 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 197 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 198 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 199 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 200 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 201 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 202 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 203 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 204 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 205 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 206 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 207 NFSERR_IO /* << Last is 86 */ 208 }; 209 210 /* 211 * Maps errno values to nfs error numbers. 212 * Although it is not obvious whether or not NFS clients really care if 213 * a returned error value is in the specified list for the procedure, the 214 * safest thing to do is filter them appropriately. For Version 2, the 215 * X/Open XNFS document is the only specification that defines error values 216 * for each RPC (The RFC simply lists all possible error values for all RPCs), 217 * so I have decided to not do this for Version 2. 218 * The first entry is the default error return and the rest are the valid 219 * errors for that RPC in increasing numeric order. 220 */ 221 static short nfsv3err_null[] = { 222 0, 223 0, 224 }; 225 226 static short nfsv3err_getattr[] = { 227 NFSERR_IO, 228 NFSERR_IO, 229 NFSERR_STALE, 230 NFSERR_BADHANDLE, 231 NFSERR_SERVERFAULT, 232 0, 233 }; 234 235 static short nfsv3err_setattr[] = { 236 NFSERR_IO, 237 NFSERR_PERM, 238 NFSERR_IO, 239 NFSERR_ACCES, 240 NFSERR_INVAL, 241 NFSERR_NOSPC, 242 NFSERR_ROFS, 243 NFSERR_DQUOT, 244 NFSERR_STALE, 245 NFSERR_BADHANDLE, 246 NFSERR_NOT_SYNC, 247 NFSERR_SERVERFAULT, 248 0, 249 }; 250 251 static short nfsv3err_lookup[] = { 252 NFSERR_IO, 253 NFSERR_NOENT, 254 NFSERR_IO, 255 NFSERR_ACCES, 256 NFSERR_NOTDIR, 257 NFSERR_NAMETOL, 258 NFSERR_STALE, 259 NFSERR_BADHANDLE, 260 NFSERR_SERVERFAULT, 261 0, 262 }; 263 264 static short nfsv3err_access[] = { 265 NFSERR_IO, 266 NFSERR_IO, 267 NFSERR_STALE, 268 NFSERR_BADHANDLE, 269 NFSERR_SERVERFAULT, 270 0, 271 }; 272 273 static short nfsv3err_readlink[] = { 274 NFSERR_IO, 275 NFSERR_IO, 276 NFSERR_ACCES, 277 NFSERR_INVAL, 278 NFSERR_STALE, 279 NFSERR_BADHANDLE, 280 NFSERR_NOTSUPP, 281 NFSERR_SERVERFAULT, 282 0, 283 }; 284 285 static short nfsv3err_read[] = { 286 NFSERR_IO, 287 NFSERR_IO, 288 NFSERR_NXIO, 289 NFSERR_ACCES, 290 NFSERR_INVAL, 291 NFSERR_STALE, 292 NFSERR_BADHANDLE, 293 NFSERR_SERVERFAULT, 294 0, 295 }; 296 297 static short nfsv3err_write[] = { 298 NFSERR_IO, 299 NFSERR_IO, 300 NFSERR_ACCES, 301 NFSERR_INVAL, 302 NFSERR_FBIG, 303 NFSERR_NOSPC, 304 NFSERR_ROFS, 305 NFSERR_DQUOT, 306 NFSERR_STALE, 307 NFSERR_BADHANDLE, 308 NFSERR_SERVERFAULT, 309 0, 310 }; 311 312 static short nfsv3err_create[] = { 313 NFSERR_IO, 314 NFSERR_IO, 315 NFSERR_ACCES, 316 NFSERR_EXIST, 317 NFSERR_NOTDIR, 318 NFSERR_NOSPC, 319 NFSERR_ROFS, 320 NFSERR_NAMETOL, 321 NFSERR_DQUOT, 322 NFSERR_STALE, 323 NFSERR_BADHANDLE, 324 NFSERR_NOTSUPP, 325 NFSERR_SERVERFAULT, 326 0, 327 }; 328 329 static short nfsv3err_mkdir[] = { 330 NFSERR_IO, 331 NFSERR_IO, 332 NFSERR_ACCES, 333 NFSERR_EXIST, 334 NFSERR_NOTDIR, 335 NFSERR_NOSPC, 336 NFSERR_ROFS, 337 NFSERR_NAMETOL, 338 NFSERR_DQUOT, 339 NFSERR_STALE, 340 NFSERR_BADHANDLE, 341 NFSERR_NOTSUPP, 342 NFSERR_SERVERFAULT, 343 0, 344 }; 345 346 static short nfsv3err_symlink[] = { 347 NFSERR_IO, 348 NFSERR_IO, 349 NFSERR_ACCES, 350 NFSERR_EXIST, 351 NFSERR_NOTDIR, 352 NFSERR_NOSPC, 353 NFSERR_ROFS, 354 NFSERR_NAMETOL, 355 NFSERR_DQUOT, 356 NFSERR_STALE, 357 NFSERR_BADHANDLE, 358 NFSERR_NOTSUPP, 359 NFSERR_SERVERFAULT, 360 0, 361 }; 362 363 static short nfsv3err_mknod[] = { 364 NFSERR_IO, 365 NFSERR_IO, 366 NFSERR_ACCES, 367 NFSERR_EXIST, 368 NFSERR_NOTDIR, 369 NFSERR_NOSPC, 370 NFSERR_ROFS, 371 NFSERR_NAMETOL, 372 NFSERR_DQUOT, 373 NFSERR_STALE, 374 NFSERR_BADHANDLE, 375 NFSERR_NOTSUPP, 376 NFSERR_SERVERFAULT, 377 NFSERR_BADTYPE, 378 0, 379 }; 380 381 static short nfsv3err_remove[] = { 382 NFSERR_IO, 383 NFSERR_NOENT, 384 NFSERR_IO, 385 NFSERR_ACCES, 386 NFSERR_NOTDIR, 387 NFSERR_ROFS, 388 NFSERR_NAMETOL, 389 NFSERR_STALE, 390 NFSERR_BADHANDLE, 391 NFSERR_SERVERFAULT, 392 0, 393 }; 394 395 static short nfsv3err_rmdir[] = { 396 NFSERR_IO, 397 NFSERR_NOENT, 398 NFSERR_IO, 399 NFSERR_ACCES, 400 NFSERR_EXIST, 401 NFSERR_NOTDIR, 402 NFSERR_INVAL, 403 NFSERR_ROFS, 404 NFSERR_NAMETOL, 405 NFSERR_NOTEMPTY, 406 NFSERR_STALE, 407 NFSERR_BADHANDLE, 408 NFSERR_NOTSUPP, 409 NFSERR_SERVERFAULT, 410 0, 411 }; 412 413 static short nfsv3err_rename[] = { 414 NFSERR_IO, 415 NFSERR_NOENT, 416 NFSERR_IO, 417 NFSERR_ACCES, 418 NFSERR_EXIST, 419 NFSERR_XDEV, 420 NFSERR_NOTDIR, 421 NFSERR_ISDIR, 422 NFSERR_INVAL, 423 NFSERR_NOSPC, 424 NFSERR_ROFS, 425 NFSERR_MLINK, 426 NFSERR_NAMETOL, 427 NFSERR_NOTEMPTY, 428 NFSERR_DQUOT, 429 NFSERR_STALE, 430 NFSERR_BADHANDLE, 431 NFSERR_NOTSUPP, 432 NFSERR_SERVERFAULT, 433 0, 434 }; 435 436 static short nfsv3err_link[] = { 437 NFSERR_IO, 438 NFSERR_IO, 439 NFSERR_ACCES, 440 NFSERR_EXIST, 441 NFSERR_XDEV, 442 NFSERR_NOTDIR, 443 NFSERR_INVAL, 444 NFSERR_NOSPC, 445 NFSERR_ROFS, 446 NFSERR_MLINK, 447 NFSERR_NAMETOL, 448 NFSERR_DQUOT, 449 NFSERR_STALE, 450 NFSERR_BADHANDLE, 451 NFSERR_NOTSUPP, 452 NFSERR_SERVERFAULT, 453 0, 454 }; 455 456 static short nfsv3err_readdir[] = { 457 NFSERR_IO, 458 NFSERR_IO, 459 NFSERR_ACCES, 460 NFSERR_NOTDIR, 461 NFSERR_STALE, 462 NFSERR_BADHANDLE, 463 NFSERR_BAD_COOKIE, 464 NFSERR_TOOSMALL, 465 NFSERR_SERVERFAULT, 466 0, 467 }; 468 469 static short nfsv3err_readdirplus[] = { 470 NFSERR_IO, 471 NFSERR_IO, 472 NFSERR_ACCES, 473 NFSERR_NOTDIR, 474 NFSERR_STALE, 475 NFSERR_BADHANDLE, 476 NFSERR_BAD_COOKIE, 477 NFSERR_NOTSUPP, 478 NFSERR_TOOSMALL, 479 NFSERR_SERVERFAULT, 480 0, 481 }; 482 483 static short nfsv3err_fsstat[] = { 484 NFSERR_IO, 485 NFSERR_IO, 486 NFSERR_STALE, 487 NFSERR_BADHANDLE, 488 NFSERR_SERVERFAULT, 489 0, 490 }; 491 492 static short nfsv3err_fsinfo[] = { 493 NFSERR_STALE, 494 NFSERR_STALE, 495 NFSERR_BADHANDLE, 496 NFSERR_SERVERFAULT, 497 0, 498 }; 499 500 static short nfsv3err_pathconf[] = { 501 NFSERR_STALE, 502 NFSERR_STALE, 503 NFSERR_BADHANDLE, 504 NFSERR_SERVERFAULT, 505 0, 506 }; 507 508 static short nfsv3err_commit[] = { 509 NFSERR_IO, 510 NFSERR_IO, 511 NFSERR_STALE, 512 NFSERR_BADHANDLE, 513 NFSERR_SERVERFAULT, 514 0, 515 }; 516 517 static short *nfsrv_v3errmap[] = { 518 nfsv3err_null, 519 nfsv3err_getattr, 520 nfsv3err_setattr, 521 nfsv3err_lookup, 522 nfsv3err_access, 523 nfsv3err_readlink, 524 nfsv3err_read, 525 nfsv3err_write, 526 nfsv3err_create, 527 nfsv3err_mkdir, 528 nfsv3err_symlink, 529 nfsv3err_mknod, 530 nfsv3err_remove, 531 nfsv3err_rmdir, 532 nfsv3err_rename, 533 nfsv3err_link, 534 nfsv3err_readdir, 535 nfsv3err_readdirplus, 536 nfsv3err_fsstat, 537 nfsv3err_fsinfo, 538 nfsv3err_pathconf, 539 nfsv3err_commit, 540 }; 541 542 #endif /* NFS_NOSERVER */ 543 544 struct nfssvc_args; 545 extern int sys_nfssvc(struct proc *, struct nfssvc_args *, int *); 546 547 /* 548 * This needs to return a monotonically increasing or close to monotonically 549 * increasing result, otherwise the write gathering queues won't work 550 * properly. 551 */ 552 u_quad_t 553 nfs_curusec(void) 554 { 555 struct timeval tv; 556 557 getmicrouptime(&tv); 558 return ((u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec); 559 } 560 561 /* 562 * Called once to initialize data structures... 563 */ 564 int 565 nfs_init(struct vfsconf *vfsp) 566 { 567 callout_init(&nfs_timer_handle); 568 nfsmount_zone = zinit("NFSMOUNT", sizeof(struct nfsmount), 0, 0, 1); 569 570 nfs_mount_type = vfsp->vfc_typenum; 571 nfsrtt.pos = 0; 572 rpc_vers = txdr_unsigned(RPC_VER2); 573 rpc_call = txdr_unsigned(RPC_CALL); 574 rpc_reply = txdr_unsigned(RPC_REPLY); 575 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 576 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 577 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 578 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 579 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 580 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 581 nfs_prog = txdr_unsigned(NFS_PROG); 582 nfs_true = txdr_unsigned(TRUE); 583 nfs_false = txdr_unsigned(FALSE); 584 nfs_xdrneg1 = txdr_unsigned(-1); 585 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 586 if (nfs_ticks < 1) 587 nfs_ticks = 1; 588 nfs_nhinit(); /* Init the nfsnode table */ 589 #ifndef NFS_NOSERVER 590 nfsrv_init(0); /* Init server data structures */ 591 nfsrv_initcache(); /* Init the server request cache */ 592 #endif 593 594 /* 595 * Mainly for vkernel operation. If memory is severely limited 596 */ 597 if (nfs_maxasyncbio > nmbclusters * MCLBYTES / NFS_MAXDATA / 3) 598 nfs_maxasyncbio = nmbclusters * MCLBYTES / NFS_MAXDATA / 3; 599 if (nfs_maxasyncbio < 4) 600 nfs_maxasyncbio = 4; 601 602 /* 603 * Initialize reply list and start timer 604 */ 605 nfs_timer(0); 606 607 nfs_prev_nfssvc_sy_narg = sysent[SYS_nfssvc].sy_narg; 608 sysent[SYS_nfssvc].sy_narg = 2; 609 nfs_prev_nfssvc_sy_call = sysent[SYS_nfssvc].sy_call; 610 sysent[SYS_nfssvc].sy_call = (sy_call_t *)sys_nfssvc; 611 612 nfs_pbuf_freecnt = nswbuf / 2 + 1; 613 614 return (0); 615 } 616 617 int 618 nfs_uninit(struct vfsconf *vfsp) 619 { 620 callout_stop(&nfs_timer_handle); 621 nfs_mount_type = -1; 622 sysent[SYS_nfssvc].sy_narg = nfs_prev_nfssvc_sy_narg; 623 sysent[SYS_nfssvc].sy_call = nfs_prev_nfssvc_sy_call; 624 return (0); 625 } 626 627 /* 628 * Attribute cache routines. 629 * nfs_loadattrcache() - loads or updates the cache contents from attributes 630 * that are on the mbuf list 631 * nfs_getattrcache() - returns valid attributes if found in cache, returns 632 * error otherwise 633 */ 634 635 /* 636 * Load the attribute cache (that lives in the nfsnode entry) with 637 * the values on the mbuf list. Load *vaper with the attributes. vaper 638 * may be NULL. 639 * 640 * As a side effect n_mtime, which we use to determine if the file was 641 * modified by some other host, is set to the attribute timestamp and 642 * NRMODIFIED is set if the two values differ. 643 * 644 * WARNING: the mtime loaded into vaper does not necessarily represent 645 * n_mtime or n_attr.mtime due to NACC and NUPD. 646 */ 647 int 648 nfs_loadattrcache(struct vnode *vp, struct mbuf **mdp, caddr_t *dposp, 649 struct vattr *vaper, int lattr_flags) 650 { 651 struct vattr *vap; 652 struct nfs_fattr *fp; 653 struct nfsnode *np; 654 int32_t t1; 655 caddr_t cp2; 656 int error = 0; 657 int rmajor, rminor; 658 udev_t rdev; 659 struct mbuf *md; 660 enum vtype vtyp; 661 u_short vmode; 662 struct timespec mtime; 663 int v3 = NFS_ISV3(vp); 664 665 md = *mdp; 666 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 667 if ((error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) != 0) 668 return (error); 669 fp = (struct nfs_fattr *)cp2; 670 if (v3) { 671 vtyp = nfsv3tov_type(fp->fa_type); 672 vmode = fxdr_unsigned(u_short, fp->fa_mode); 673 rmajor = (int)fxdr_unsigned(int, fp->fa3_rdev.specdata1); 674 rminor = (int)fxdr_unsigned(int, fp->fa3_rdev.specdata2); 675 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 676 } else { 677 vtyp = nfsv2tov_type(fp->fa_type); 678 vmode = fxdr_unsigned(u_short, fp->fa_mode); 679 /* 680 * XXX 681 * 682 * The duplicate information returned in fa_type and fa_mode 683 * is an ambiguity in the NFS version 2 protocol. 684 * 685 * VREG should be taken literally as a regular file. If a 686 * server intents to return some type information differently 687 * in the upper bits of the mode field (e.g. for sockets, or 688 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 689 * leave the examination of the mode bits even in the VREG 690 * case to avoid breakage for bogus servers, but we make sure 691 * that there are actually type bits set in the upper part of 692 * fa_mode (and failing that, trust the va_type field). 693 * 694 * NFSv3 cleared the issue, and requires fa_mode to not 695 * contain any type information (while also introduing sockets 696 * and FIFOs for fa_type). 697 */ 698 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 699 vtyp = IFTOVT(vmode); 700 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 701 rmajor = umajor(rdev); 702 rminor = uminor(rdev); 703 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 704 705 /* 706 * Really ugly NFSv2 kludge. 707 */ 708 if (vtyp == VCHR && rdev == (udev_t)0xffffffff) 709 vtyp = VFIFO; 710 } 711 712 /* 713 * If v_type == VNON it is a new node, so fill in the v_type, 714 * n_mtime fields. Check to see if it represents a special 715 * device, and if so, check for a possible alias. Once the 716 * correct vnode has been obtained, fill in the rest of the 717 * information. 718 */ 719 np = VTONFS(vp); 720 if (vp->v_type != vtyp) { 721 nfs_setvtype(vp, vtyp); 722 if (vp->v_type == VFIFO) { 723 vp->v_ops = &vp->v_mount->mnt_vn_fifo_ops; 724 } else if (vp->v_type == VCHR || vp->v_type == VBLK) { 725 vp->v_ops = &vp->v_mount->mnt_vn_spec_ops; 726 addaliasu(vp, rmajor, rminor); 727 } else { 728 vp->v_ops = &vp->v_mount->mnt_vn_use_ops; 729 } 730 np->n_mtime = mtime.tv_sec; 731 } else if (np->n_mtime != mtime.tv_sec) { 732 /* 733 * If we haven't modified the file locally and the server 734 * timestamp does not match, then the server probably 735 * modified the file. We must flag this condition so 736 * the proper syncnronization can be done. We do not 737 * try to synchronize the state here because that 738 * could lead to an endless recursion. 739 * 740 * XXX loadattrcache can be set during the reply to a write, 741 * before the write timestamp is properly processed. To 742 * avoid unconditionally setting the rmodified bit (which 743 * has the effect of flushing the cache), we only do this 744 * check if the lmodified bit is not set. 745 */ 746 np->n_mtime = mtime.tv_sec; 747 if ((lattr_flags & NFS_LATTR_NOMTIMECHECK) == 0) 748 np->n_flag |= NRMODIFIED; 749 } 750 vap = &np->n_vattr; 751 vap->va_type = vtyp; 752 vap->va_mode = (vmode & 07777); 753 vap->va_rmajor = rmajor; 754 vap->va_rminor = rminor; 755 vap->va_mtime = mtime; 756 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 757 if (v3) { 758 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 759 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 760 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 761 vap->va_size = fxdr_hyper(&fp->fa3_size); 762 vap->va_blocksize = NFS_FABLKSIZE; 763 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 764 vap->va_fileid = fxdr_hyper(&fp->fa3_fileid); 765 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 766 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 767 vap->va_flags = 0; 768 vap->va_filerev = 0; 769 } else { 770 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 771 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 772 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 773 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 774 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); 775 vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) 776 * NFS_FABLKSIZE; 777 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 778 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 779 vap->va_flags = 0; 780 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 781 fp->fa2_ctime.nfsv2_sec); 782 vap->va_ctime.tv_nsec = 0; 783 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 784 vap->va_filerev = 0; 785 } 786 np->n_attrstamp = time_second; 787 if (vap->va_size != np->n_size) { 788 if (vap->va_type == VREG) { 789 /* 790 * Get rid of all the junk we had before and just 791 * set NRMODIFIED if NLMODIFIED is 0. Depend on 792 * occassionally flushing our dirty buffers to 793 * clear both the NLMODIFIED and NRMODIFIED flags. 794 */ 795 if ((np->n_flag & NLMODIFIED) == 0) 796 np->n_flag |= NRMODIFIED; 797 #if 0 798 if ((lattr_flags & NFS_LATTR_NOSHRINK) && 799 vap->va_size < np->n_size) { 800 /* 801 * We've been told not to shrink the file; 802 * zero np->n_attrstamp to indicate that 803 * the attributes are stale. 804 * 805 * This occurs primarily due to recursive 806 * NFS ops that are executed during periods 807 * where we cannot safely reduce the size of 808 * the file. 809 * 810 * Additionally, write rpcs are broken down 811 * into buffers and np->n_size is 812 * pre-extended. Setting NRMODIFIED here 813 * can result in n_size getting reset to a 814 * lower value, which is NOT what we want. 815 * XXX this needs to be cleaned up a lot 816 * more. 817 */ 818 vap->va_size = np->n_size; 819 np->n_attrstamp = 0; 820 if ((np->n_flag & NLMODIFIED) == 0) 821 np->n_flag |= NRMODIFIED; 822 } else if (np->n_flag & NLMODIFIED) { 823 /* 824 * We've modified the file: Use the larger 825 * of our size, and the server's size. At 826 * this point the cache coherency is all 827 * shot to hell. To try to handle multiple 828 * clients appending to the file at the same 829 * time mark that the server has changed 830 * the file if the server's notion of the 831 * file size is larger then our notion. 832 * 833 * XXX this needs work. 834 */ 835 if (vap->va_size < np->n_size) { 836 vap->va_size = np->n_size; 837 } else { 838 np->n_size = vap->va_size; 839 np->n_flag |= NRMODIFIED; 840 } 841 } else { 842 /* 843 * Someone changed the file's size on the 844 * server and there are no local changes 845 * to get in the way, set the size and mark 846 * it. 847 */ 848 np->n_size = vap->va_size; 849 np->n_flag |= NRMODIFIED; 850 } 851 nvnode_pager_setsize(vp, np->n_size, XXX); 852 #endif 853 } else { 854 np->n_size = vap->va_size; 855 } 856 } 857 if (vaper != NULL) { 858 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 859 if (np->n_flag & NCHG) { 860 if (np->n_flag & NACC) 861 vaper->va_atime = np->n_atim; 862 if (np->n_flag & NUPD) 863 vaper->va_mtime = np->n_mtim; 864 } 865 } 866 return (0); 867 } 868 869 #ifdef NFS_ACDEBUG 870 #include <sys/sysctl.h> 871 SYSCTL_DECL(_vfs_nfs); 872 static int nfs_acdebug; 873 SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, ""); 874 #endif 875 876 /* 877 * Check the time stamp 878 * If the cache is valid, copy contents to *vap and return 0 879 * otherwise return an error 880 */ 881 int 882 nfs_getattrcache(struct vnode *vp, struct vattr *vaper) 883 { 884 struct nfsnode *np; 885 struct vattr *vap; 886 struct nfsmount *nmp; 887 int timeo; 888 889 np = VTONFS(vp); 890 vap = &np->n_vattr; 891 nmp = VFSTONFS(vp->v_mount); 892 893 /* 894 * Dynamic timeout based on how recently the file was modified. 895 * n_mtime is always valid. 896 */ 897 timeo = (get_approximate_time_t() - np->n_mtime) / 60; 898 899 #ifdef NFS_ACDEBUG 900 if (nfs_acdebug>1) 901 kprintf("nfs_getattrcache: initial timeo = %d\n", timeo); 902 #endif 903 904 if (vap->va_type == VDIR) { 905 if ((np->n_flag & NLMODIFIED) || timeo < nmp->nm_acdirmin) 906 timeo = nmp->nm_acdirmin; 907 else if (timeo > nmp->nm_acdirmax) 908 timeo = nmp->nm_acdirmax; 909 } else { 910 if ((np->n_flag & NLMODIFIED) || timeo < nmp->nm_acregmin) 911 timeo = nmp->nm_acregmin; 912 else if (timeo > nmp->nm_acregmax) 913 timeo = nmp->nm_acregmax; 914 } 915 916 #ifdef NFS_ACDEBUG 917 if (nfs_acdebug > 2) 918 kprintf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n", 919 nmp->nm_acregmin, nmp->nm_acregmax, 920 nmp->nm_acdirmin, nmp->nm_acdirmax); 921 922 if (nfs_acdebug) 923 kprintf("nfs_getattrcache: age = %d; final timeo = %d\n", 924 (int)(time_second - np->n_attrstamp), timeo); 925 #endif 926 927 if (np->n_attrstamp == 0 || (time_second - np->n_attrstamp) >= timeo) { 928 nfsstats.attrcache_misses++; 929 return (ENOENT); 930 } 931 nfsstats.attrcache_hits++; 932 933 /* 934 * Our attribute cache can be stale due to modifications made on 935 * this host. XXX this is a bad hack. We need a more deterministic 936 * means of finding out which np fields are valid verses attr cache 937 * fields. We really should update the vattr info on the fly when 938 * making local changes. 939 */ 940 if (vap->va_size != np->n_size) { 941 if (vap->va_type == VREG) { 942 if (np->n_flag & NLMODIFIED) 943 vap->va_size = np->n_size; 944 nfs_meta_setsize(vp, curthread, vap->va_size, 0); 945 } else { 946 np->n_size = vap->va_size; 947 } 948 } 949 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 950 if (np->n_flag & NCHG) { 951 if (np->n_flag & NACC) 952 vaper->va_atime = np->n_atim; 953 if (np->n_flag & NUPD) 954 vaper->va_mtime = np->n_mtim; 955 } 956 return (0); 957 } 958 959 #ifndef NFS_NOSERVER 960 961 /* 962 * Set up nameidata for a lookup() call and do it. 963 * 964 * If pubflag is set, this call is done for a lookup operation on the 965 * public filehandle. In that case we allow crossing mountpoints and 966 * absolute pathnames. However, the caller is expected to check that 967 * the lookup result is within the public fs, and deny access if 968 * it is not. 969 * 970 * dirp may be set whether an error is returned or not, and must be 971 * released by the caller. 972 * 973 * On return nd->nl_nch usually points to the target ncp, which may represent 974 * a negative hit. 975 * 976 * NOTE: the caller must call nlookup_done(nd) unconditionally on return 977 * to cleanup. 978 */ 979 int 980 nfs_namei(struct nlookupdata *nd, struct ucred *cred, int nflags, 981 struct vnode **dvpp, struct vnode **vpp, 982 fhandle_t *fhp, int len, 983 struct nfssvc_sock *slp, struct sockaddr *nam, struct mbuf **mdp, 984 caddr_t *dposp, struct vnode **dirpp, struct thread *td, 985 int kerbflag, int pubflag) 986 { 987 int i, rem; 988 struct mbuf *md; 989 char *fromcp, *tocp, *cp; 990 char *namebuf; 991 struct nchandle nch; 992 struct vnode *dp; 993 struct mount *mp; 994 int error, rdonly; 995 996 namebuf = objcache_get(namei_oc, M_WAITOK); 997 *dirpp = NULL; 998 999 /* 1000 * Copy the name from the mbuf list to namebuf. 1001 */ 1002 fromcp = *dposp; 1003 tocp = namebuf; 1004 md = *mdp; 1005 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1006 for (i = 0; i < len; i++) { 1007 while (rem == 0) { 1008 md = md->m_next; 1009 if (md == NULL) { 1010 error = EBADRPC; 1011 goto out; 1012 } 1013 fromcp = mtod(md, caddr_t); 1014 rem = md->m_len; 1015 } 1016 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1017 error = EACCES; 1018 goto out; 1019 } 1020 *tocp++ = *fromcp++; 1021 rem--; 1022 } 1023 *tocp = '\0'; 1024 *mdp = md; 1025 *dposp = fromcp; 1026 len = nfsm_rndup(len)-len; 1027 if (len > 0) { 1028 if (rem >= len) 1029 *dposp += len; 1030 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1031 goto out; 1032 } 1033 1034 /* 1035 * Extract and set starting directory. The returned dp is refd 1036 * but not locked. 1037 */ 1038 error = nfsrv_fhtovp(fhp, FALSE, &mp, &dp, cred, slp, 1039 nam, &rdonly, kerbflag, pubflag); 1040 if (error) 1041 goto out; 1042 if (dp->v_type != VDIR) { 1043 vrele(dp); 1044 error = ENOTDIR; 1045 goto out; 1046 } 1047 1048 /* 1049 * Set return directory. Reference to dp is implicitly transfered 1050 * to the returned pointer. This must be set before we potentially 1051 * goto out below. 1052 */ 1053 *dirpp = dp; 1054 1055 /* 1056 * read-only - NLC_DELETE, NLC_RENAME_DST are disallowed. NLC_CREATE 1057 * is passed through to nlookup() and will be disallowed 1058 * if the file does not already exist. 1059 */ 1060 if (rdonly) { 1061 nflags |= NLC_NFS_RDONLY; 1062 if (nflags & (NLC_DELETE | NLC_RENAME_DST)) { 1063 error = EROFS; 1064 goto out; 1065 } 1066 } 1067 1068 /* 1069 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1070 * and the 'native path' indicator. 1071 */ 1072 if (pubflag) { 1073 cp = objcache_get(namei_oc, M_WAITOK); 1074 fromcp = namebuf; 1075 tocp = cp; 1076 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1077 switch ((unsigned char)*fromcp) { 1078 case WEBNFS_NATIVE_CHAR: 1079 /* 1080 * 'Native' path for us is the same 1081 * as a path according to the NFS spec, 1082 * just skip the escape char. 1083 */ 1084 fromcp++; 1085 break; 1086 /* 1087 * More may be added in the future, range 0x80-0xff 1088 */ 1089 default: 1090 error = EIO; 1091 objcache_put(namei_oc, cp); 1092 goto out; 1093 } 1094 } 1095 /* 1096 * Translate the '%' escapes, URL-style. 1097 */ 1098 while (*fromcp != '\0') { 1099 if (*fromcp == WEBNFS_ESC_CHAR) { 1100 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1101 fromcp++; 1102 *tocp++ = HEXSTRTOI(fromcp); 1103 fromcp += 2; 1104 continue; 1105 } else { 1106 error = ENOENT; 1107 objcache_put(namei_oc, cp); 1108 goto out; 1109 } 1110 } else 1111 *tocp++ = *fromcp++; 1112 } 1113 *tocp = '\0'; 1114 objcache_put(namei_oc, namebuf); 1115 namebuf = cp; 1116 } 1117 1118 /* 1119 * Setup for search. We need to get a start directory from dp. Note 1120 * that dp is ref'd, but we no longer 'own' the ref (*dirpp owns it). 1121 */ 1122 if (pubflag == 0) { 1123 nflags |= NLC_NFS_NOSOFTLINKTRAV; 1124 nflags |= NLC_NOCROSSMOUNT; 1125 } 1126 1127 /* 1128 * We need a starting ncp from the directory vnode dp. dp must not 1129 * be locked. The returned ncp will be refd but not locked. 1130 * 1131 * If no suitable ncp is found we instruct cache_fromdvp() to create 1132 * one. If this fails the directory has probably been removed while 1133 * the target was chdir'd into it and any further lookup will fail. 1134 */ 1135 if ((error = cache_fromdvp(dp, cred, 1, &nch)) != 0) 1136 goto out; 1137 nlookup_init_raw(nd, namebuf, UIO_SYSSPACE, nflags, cred, &nch); 1138 cache_drop(&nch); 1139 1140 /* 1141 * Ok, do the lookup. 1142 */ 1143 error = nlookup(nd); 1144 1145 /* 1146 * If no error occured return the requested dvpp and vpp. If 1147 * NLC_CREATE was specified nd->nl_nch may represent a negative 1148 * cache hit in which case we do not attempt to obtain the vp. 1149 */ 1150 if (error == 0) { 1151 if (dvpp) { 1152 if (nd->nl_nch.ncp->nc_parent) { 1153 nch = nd->nl_nch; 1154 nch.ncp = nch.ncp->nc_parent; 1155 cache_hold(&nch); 1156 cache_lock(&nch); 1157 error = cache_vget(&nch, nd->nl_cred, 1158 LK_EXCLUSIVE, dvpp); 1159 cache_put(&nch); 1160 } else { 1161 error = ENXIO; 1162 } 1163 } 1164 if (vpp && nd->nl_nch.ncp->nc_vp) { 1165 error = cache_vget(&nd->nl_nch, nd->nl_cred, LK_EXCLUSIVE, vpp); 1166 } 1167 if (error) { 1168 if (dvpp && *dvpp) { 1169 vput(*dvpp); 1170 *dvpp = NULL; 1171 } 1172 if (vpp && *vpp) { 1173 vput(*vpp); 1174 *vpp = NULL; 1175 } 1176 } 1177 } 1178 1179 /* 1180 * Finish up. 1181 */ 1182 out: 1183 objcache_put(namei_oc, namebuf); 1184 return (error); 1185 } 1186 1187 /* 1188 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1189 * - look up fsid in mount list (if not found ret error) 1190 * - get vp and export rights by calling VFS_FHTOVP() 1191 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1192 * - if not lockflag unlock it with vn_unlock() 1193 */ 1194 int 1195 nfsrv_fhtovp(fhandle_t *fhp, int lockflag, 1196 struct mount **mpp, struct vnode **vpp, 1197 struct ucred *cred, struct nfssvc_sock *slp, struct sockaddr *nam, 1198 int *rdonlyp, int kerbflag, int pubflag) 1199 { 1200 struct mount *mp; 1201 int i; 1202 struct ucred *credanon; 1203 int error, exflags; 1204 #ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */ 1205 struct sockaddr_int *saddr; 1206 #endif 1207 1208 *vpp = NULL; 1209 *mpp = NULL; 1210 1211 if (nfs_ispublicfh(fhp)) { 1212 if (!pubflag || !nfs_pub.np_valid) 1213 return (ESTALE); 1214 fhp = &nfs_pub.np_handle; 1215 } 1216 1217 mp = *mpp = vfs_getvfs(&fhp->fh_fsid); 1218 if (mp == NULL) 1219 return (ESTALE); 1220 error = VFS_CHECKEXP(mp, nam, &exflags, &credanon); 1221 if (error) 1222 return (error); 1223 error = VFS_FHTOVP(mp, NULL, &fhp->fh_fid, vpp); 1224 if (error) 1225 return (error); 1226 #ifdef MNT_EXNORESPORT 1227 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 1228 saddr = (struct sockaddr_in *)nam; 1229 if (saddr->sin_family == AF_INET && 1230 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 1231 vput(*vpp); 1232 *vpp = NULL; 1233 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1234 } 1235 } 1236 #endif 1237 /* 1238 * Check/setup credentials. 1239 */ 1240 if (exflags & MNT_EXKERB) { 1241 if (!kerbflag) { 1242 vput(*vpp); 1243 *vpp = NULL; 1244 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1245 } 1246 } else if (kerbflag) { 1247 vput(*vpp); 1248 *vpp = NULL; 1249 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1250 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1251 cred->cr_uid = credanon->cr_uid; 1252 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1253 cred->cr_groups[i] = credanon->cr_groups[i]; 1254 cred->cr_ngroups = i; 1255 } 1256 if (exflags & MNT_EXRDONLY) 1257 *rdonlyp = 1; 1258 else 1259 *rdonlyp = 0; 1260 1261 if (!lockflag) 1262 vn_unlock(*vpp); 1263 return (0); 1264 } 1265 1266 /* 1267 * WebNFS: check if a filehandle is a public filehandle. For v3, this 1268 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 1269 * transformed this to all zeroes in both cases, so check for it. 1270 */ 1271 int 1272 nfs_ispublicfh(fhandle_t *fhp) 1273 { 1274 char *cp = (char *)fhp; 1275 int i; 1276 1277 for (i = 0; i < NFSX_V3FH; i++) 1278 if (*cp++ != 0) 1279 return (FALSE); 1280 return (TRUE); 1281 } 1282 1283 #endif /* NFS_NOSERVER */ 1284 /* 1285 * This function compares two net addresses by family and returns TRUE 1286 * if they are the same host. 1287 * If there is any doubt, return FALSE. 1288 * The AF_INET family is handled as a special case so that address mbufs 1289 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1290 */ 1291 int 1292 netaddr_match(int family, union nethostaddr *haddr, struct sockaddr *nam) 1293 { 1294 struct sockaddr_in *inetaddr; 1295 1296 switch (family) { 1297 case AF_INET: 1298 inetaddr = (struct sockaddr_in *)nam; 1299 if (inetaddr->sin_family == AF_INET && 1300 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1301 return (1); 1302 break; 1303 default: 1304 break; 1305 }; 1306 return (0); 1307 } 1308 1309 static nfsuint64 nfs_nullcookie = { { 0, 0 } }; 1310 /* 1311 * This function finds the directory cookie that corresponds to the 1312 * logical byte offset given. 1313 */ 1314 nfsuint64 * 1315 nfs_getcookie(struct nfsnode *np, off_t off, int add) 1316 { 1317 struct nfsdmap *dp, *dp2; 1318 int pos; 1319 1320 pos = (uoff_t)off / NFS_DIRBLKSIZ; 1321 if (pos == 0 || off < 0) { 1322 #ifdef DIAGNOSTIC 1323 if (add) 1324 panic("nfs getcookie add at <= 0"); 1325 #endif 1326 return (&nfs_nullcookie); 1327 } 1328 pos--; 1329 dp = np->n_cookies.lh_first; 1330 if (!dp) { 1331 if (add) { 1332 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 1333 M_NFSDIROFF, M_WAITOK); 1334 dp->ndm_eocookie = 0; 1335 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 1336 } else 1337 return (NULL); 1338 } 1339 while (pos >= NFSNUMCOOKIES) { 1340 pos -= NFSNUMCOOKIES; 1341 if (dp->ndm_list.le_next) { 1342 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 1343 pos >= dp->ndm_eocookie) 1344 return (NULL); 1345 dp = dp->ndm_list.le_next; 1346 } else if (add) { 1347 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 1348 M_NFSDIROFF, M_WAITOK); 1349 dp2->ndm_eocookie = 0; 1350 LIST_INSERT_AFTER(dp, dp2, ndm_list); 1351 dp = dp2; 1352 } else 1353 return (NULL); 1354 } 1355 if (pos >= dp->ndm_eocookie) { 1356 if (add) 1357 dp->ndm_eocookie = pos + 1; 1358 else 1359 return (NULL); 1360 } 1361 return (&dp->ndm_cookies[pos]); 1362 } 1363 1364 /* 1365 * Invalidate cached directory information, except for the actual directory 1366 * blocks (which are invalidated separately). 1367 * Done mainly to avoid the use of stale offset cookies. 1368 */ 1369 void 1370 nfs_invaldir(struct vnode *vp) 1371 { 1372 struct nfsnode *np = VTONFS(vp); 1373 1374 #ifdef DIAGNOSTIC 1375 if (vp->v_type != VDIR) 1376 panic("nfs: invaldir not dir"); 1377 #endif 1378 np->n_direofoffset = 0; 1379 np->n_cookieverf.nfsuquad[0] = 0; 1380 np->n_cookieverf.nfsuquad[1] = 0; 1381 if (np->n_cookies.lh_first) 1382 np->n_cookies.lh_first->ndm_eocookie = 0; 1383 } 1384 1385 /* 1386 * Set the v_type field for an NFS client's vnode and initialize for 1387 * buffer cache operations if necessary. 1388 */ 1389 void 1390 nfs_setvtype(struct vnode *vp, enum vtype vtyp) 1391 { 1392 vp->v_type = vtyp; 1393 1394 switch(vtyp) { 1395 case VREG: 1396 case VDIR: 1397 case VLNK: 1398 /* 1399 * Needs VMIO, size not yet known, and blocksize 1400 * is not really relevant if we are passing a 1401 * filesize of 0. 1402 */ 1403 vinitvmio(vp, 0, PAGE_SIZE, -1); 1404 break; 1405 default: 1406 break; 1407 } 1408 } 1409 1410 /* 1411 * The write verifier has changed (probably due to a server reboot), so all 1412 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 1413 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 1414 * and B_CLUSTEROK flags. Once done the new write verifier can be set for the 1415 * mount point. 1416 * 1417 * B_CLUSTEROK must be cleared along with B_NEEDCOMMIT because stage 1 data 1418 * writes are not clusterable. 1419 */ 1420 1421 static int nfs_clearcommit_bp(struct buf *bp, void *data __unused); 1422 static int nfs_clearcommit_callback(struct mount *mp, struct vnode *vp, 1423 void *data __unused); 1424 1425 void 1426 nfs_clearcommit(struct mount *mp) 1427 { 1428 vmntvnodescan(mp, VMSC_NOWAIT, nfs_clearcommit_callback, NULL, NULL); 1429 } 1430 1431 static int 1432 nfs_clearcommit_callback(struct mount *mp, struct vnode *vp, 1433 void *data __unused) 1434 { 1435 vhold(vp); 1436 lwkt_gettoken(&vp->v_token); 1437 RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL, 1438 nfs_clearcommit_bp, NULL); 1439 lwkt_reltoken(&vp->v_token); 1440 vdrop(vp); 1441 return(0); 1442 } 1443 1444 static int 1445 nfs_clearcommit_bp(struct buf *bp, void *data __unused) 1446 { 1447 if (BUF_REFCNT(bp) == 0 && 1448 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) 1449 == (B_DELWRI | B_NEEDCOMMIT)) { 1450 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 1451 } 1452 return(0); 1453 } 1454 1455 #ifndef NFS_NOSERVER 1456 /* 1457 * Map errnos to NFS error numbers. For Version 3 also filter out error 1458 * numbers not specified for the associated procedure. 1459 */ 1460 int 1461 nfsrv_errmap(struct nfsrv_descript *nd, int err) 1462 { 1463 short *defaulterrp, *errp; 1464 1465 if (nd->nd_flag & ND_NFSV3) { 1466 if (nd->nd_procnum <= NFSPROC_COMMIT) { 1467 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 1468 while (*++errp) { 1469 if (*errp == err) 1470 return (err); 1471 else if (*errp > err) 1472 break; 1473 } 1474 return ((int)*defaulterrp); 1475 } else 1476 return (err & 0xffff); 1477 } 1478 if (err <= ELAST) 1479 return ((int)nfsrv_v2errmap[err - 1]); 1480 return (NFSERR_IO); 1481 } 1482 1483 /* 1484 * Sort the group list in increasing numerical order. 1485 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 1486 * that used to be here.) 1487 */ 1488 void 1489 nfsrvw_sort(gid_t *list, int num) 1490 { 1491 int i, j; 1492 gid_t v; 1493 1494 /* Insertion sort. */ 1495 for (i = 1; i < num; i++) { 1496 v = list[i]; 1497 /* find correct slot for value v, moving others up */ 1498 for (j = i; --j >= 0 && v < list[j];) 1499 list[j + 1] = list[j]; 1500 list[j + 1] = v; 1501 } 1502 } 1503 1504 /* 1505 * copy credentials making sure that the result can be compared with bcmp(). 1506 */ 1507 void 1508 nfsrv_setcred(struct ucred *incred, struct ucred *outcred) 1509 { 1510 int i; 1511 1512 bzero((caddr_t)outcred, sizeof (struct ucred)); 1513 outcred->cr_ref = 1; 1514 outcred->cr_uid = incred->cr_uid; 1515 outcred->cr_ngroups = incred->cr_ngroups; 1516 for (i = 0; i < incred->cr_ngroups; i++) 1517 outcred->cr_groups[i] = incred->cr_groups[i]; 1518 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 1519 } 1520 #endif /* NFS_NOSERVER */ 1521