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/mbuf.h> 50 #include <sys/socket.h> 51 #include <sys/stat.h> 52 #include <sys/malloc.h> 53 #include <sys/sysent.h> 54 #include <sys/syscall.h> 55 #include <sys/sysmsg.h> 56 #include <sys/conf.h> 57 #include <sys/objcache.h> 58 #include <sys/jail.h> 59 60 #include <vm/vm.h> 61 #include <vm/vm_object.h> 62 #include <vm/vm_extern.h> 63 64 #include <sys/buf2.h> 65 66 #include "rpcv2.h" 67 #include "nfsproto.h" 68 #include "nfs.h" 69 #include "nfsmount.h" 70 #include "nfsnode.h" 71 #include "xdr_subs.h" 72 #include "nfsm_subs.h" 73 #include "nfsrtt.h" 74 75 #include <netinet/in.h> 76 77 /* 78 * Data items converted to xdr at startup, since they are constant 79 * This is kinda hokey, but may save a little time doing byte swaps 80 */ 81 u_int32_t nfs_xdrneg1; 82 u_int32_t rpc_reply, rpc_msgdenied, rpc_mismatch, rpc_vers; 83 u_int32_t rpc_auth_unix, rpc_msgaccepted, rpc_call, rpc_autherr; 84 u_int32_t rpc_auth_kerb; 85 u_int32_t nfs_prog, nfs_true, nfs_false; 86 87 /* And other global data */ 88 static enum vtype nv2tov_type[8]= { 89 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON 90 }; 91 enum vtype nv3tov_type[8]= { 92 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO 93 }; 94 95 int nfs_ticks; 96 97 /* 98 * Protect master lists only. Primary protection uses the per-mount 99 * and per nfssvc_sock tokens. 100 */ 101 struct lwkt_token nfs_token = LWKT_TOKEN_INITIALIZER(unp_token); 102 103 static long nfs_pbuf_freecnt = -1; /* start out unlimited */ 104 105 struct nfsmount_head nfs_mountq = TAILQ_HEAD_INITIALIZER(nfs_mountq); 106 struct nfssvc_sockhead nfssvc_sockhead; 107 int nfssvc_sockhead_flag; 108 struct nfsd_head nfsd_head; 109 int nfsd_head_flag; 110 struct nfs_bufq nfs_bufq; 111 struct nqfhhashhead *nqfhhashtbl; 112 u_long nqfhhash; 113 114 static int nfs_prev_nfssvc_sy_narg; 115 static sy_call_t *nfs_prev_nfssvc_sy_call; 116 117 #ifndef NFS_NOSERVER 118 119 /* 120 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 121 */ 122 int nfsv3_procid[NFS_NPROCS] = { 123 NFSPROC_NULL, 124 NFSPROC_GETATTR, 125 NFSPROC_SETATTR, 126 NFSPROC_NOOP, 127 NFSPROC_LOOKUP, 128 NFSPROC_READLINK, 129 NFSPROC_READ, 130 NFSPROC_NOOP, 131 NFSPROC_WRITE, 132 NFSPROC_CREATE, 133 NFSPROC_REMOVE, 134 NFSPROC_RENAME, 135 NFSPROC_LINK, 136 NFSPROC_SYMLINK, 137 NFSPROC_MKDIR, 138 NFSPROC_RMDIR, 139 NFSPROC_READDIR, 140 NFSPROC_FSSTAT, 141 NFSPROC_NOOP, 142 NFSPROC_NOOP, 143 NFSPROC_NOOP, 144 NFSPROC_NOOP, 145 NFSPROC_NOOP, 146 NFSPROC_NOOP, 147 NFSPROC_NOOP, 148 NFSPROC_NOOP 149 }; 150 151 #endif /* NFS_NOSERVER */ 152 /* 153 * and the reverse mapping from generic to Version 2 procedure numbers 154 */ 155 int nfsv2_procid[NFS_NPROCS] = { 156 NFSV2PROC_NULL, 157 NFSV2PROC_GETATTR, 158 NFSV2PROC_SETATTR, 159 NFSV2PROC_LOOKUP, 160 NFSV2PROC_NOOP, 161 NFSV2PROC_READLINK, 162 NFSV2PROC_READ, 163 NFSV2PROC_WRITE, 164 NFSV2PROC_CREATE, 165 NFSV2PROC_MKDIR, 166 NFSV2PROC_SYMLINK, 167 NFSV2PROC_CREATE, 168 NFSV2PROC_REMOVE, 169 NFSV2PROC_RMDIR, 170 NFSV2PROC_RENAME, 171 NFSV2PROC_LINK, 172 NFSV2PROC_READDIR, 173 NFSV2PROC_NOOP, 174 NFSV2PROC_STATFS, 175 NFSV2PROC_NOOP, 176 NFSV2PROC_NOOP, 177 NFSV2PROC_NOOP, 178 NFSV2PROC_NOOP, 179 NFSV2PROC_NOOP, 180 NFSV2PROC_NOOP, 181 NFSV2PROC_NOOP, 182 }; 183 184 #ifndef NFS_NOSERVER 185 /* 186 * Maps errno values to nfs error numbers. 187 * Use NFSERR_IO as the catch all for ones not specifically defined in 188 * RFC 1094. 189 */ 190 static u_char nfsrv_v2errmap[ELAST] = { 191 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 192 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 193 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 194 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 195 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 196 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 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_IO, NFSERR_IO, NFSERR_IO, 203 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 204 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 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, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 208 NFSERR_IO /* << Last is 86 */ 209 }; 210 211 /* 212 * Maps errno values to nfs error numbers. 213 * Although it is not obvious whether or not NFS clients really care if 214 * a returned error value is in the specified list for the procedure, the 215 * safest thing to do is filter them appropriately. For Version 2, the 216 * X/Open XNFS document is the only specification that defines error values 217 * for each RPC (The RFC simply lists all possible error values for all RPCs), 218 * so I have decided to not do this for Version 2. 219 * The first entry is the default error return and the rest are the valid 220 * errors for that RPC in increasing numeric order. 221 */ 222 static short nfsv3err_null[] = { 223 0, 224 0, 225 }; 226 227 static short nfsv3err_getattr[] = { 228 NFSERR_IO, 229 NFSERR_IO, 230 NFSERR_STALE, 231 NFSERR_BADHANDLE, 232 NFSERR_SERVERFAULT, 233 0, 234 }; 235 236 static short nfsv3err_setattr[] = { 237 NFSERR_IO, 238 NFSERR_PERM, 239 NFSERR_IO, 240 NFSERR_ACCES, 241 NFSERR_INVAL, 242 NFSERR_NOSPC, 243 NFSERR_ROFS, 244 NFSERR_DQUOT, 245 NFSERR_STALE, 246 NFSERR_BADHANDLE, 247 NFSERR_NOT_SYNC, 248 NFSERR_SERVERFAULT, 249 0, 250 }; 251 252 static short nfsv3err_lookup[] = { 253 NFSERR_IO, 254 NFSERR_NOENT, 255 NFSERR_IO, 256 NFSERR_ACCES, 257 NFSERR_NOTDIR, 258 NFSERR_NAMETOL, 259 NFSERR_STALE, 260 NFSERR_BADHANDLE, 261 NFSERR_SERVERFAULT, 262 0, 263 }; 264 265 static short nfsv3err_access[] = { 266 NFSERR_IO, 267 NFSERR_IO, 268 NFSERR_STALE, 269 NFSERR_BADHANDLE, 270 NFSERR_SERVERFAULT, 271 0, 272 }; 273 274 static short nfsv3err_readlink[] = { 275 NFSERR_IO, 276 NFSERR_IO, 277 NFSERR_ACCES, 278 NFSERR_INVAL, 279 NFSERR_STALE, 280 NFSERR_BADHANDLE, 281 NFSERR_NOTSUPP, 282 NFSERR_SERVERFAULT, 283 0, 284 }; 285 286 static short nfsv3err_read[] = { 287 NFSERR_IO, 288 NFSERR_IO, 289 NFSERR_NXIO, 290 NFSERR_ACCES, 291 NFSERR_INVAL, 292 NFSERR_STALE, 293 NFSERR_BADHANDLE, 294 NFSERR_SERVERFAULT, 295 0, 296 }; 297 298 static short nfsv3err_write[] = { 299 NFSERR_IO, 300 NFSERR_IO, 301 NFSERR_ACCES, 302 NFSERR_INVAL, 303 NFSERR_FBIG, 304 NFSERR_NOSPC, 305 NFSERR_ROFS, 306 NFSERR_DQUOT, 307 NFSERR_STALE, 308 NFSERR_BADHANDLE, 309 NFSERR_SERVERFAULT, 310 0, 311 }; 312 313 static short nfsv3err_create[] = { 314 NFSERR_IO, 315 NFSERR_IO, 316 NFSERR_ACCES, 317 NFSERR_EXIST, 318 NFSERR_NOTDIR, 319 NFSERR_NOSPC, 320 NFSERR_ROFS, 321 NFSERR_NAMETOL, 322 NFSERR_DQUOT, 323 NFSERR_STALE, 324 NFSERR_BADHANDLE, 325 NFSERR_NOTSUPP, 326 NFSERR_SERVERFAULT, 327 0, 328 }; 329 330 static short nfsv3err_mkdir[] = { 331 NFSERR_IO, 332 NFSERR_IO, 333 NFSERR_ACCES, 334 NFSERR_EXIST, 335 NFSERR_NOTDIR, 336 NFSERR_NOSPC, 337 NFSERR_ROFS, 338 NFSERR_NAMETOL, 339 NFSERR_DQUOT, 340 NFSERR_STALE, 341 NFSERR_BADHANDLE, 342 NFSERR_NOTSUPP, 343 NFSERR_SERVERFAULT, 344 0, 345 }; 346 347 static short nfsv3err_symlink[] = { 348 NFSERR_IO, 349 NFSERR_IO, 350 NFSERR_ACCES, 351 NFSERR_EXIST, 352 NFSERR_NOTDIR, 353 NFSERR_NOSPC, 354 NFSERR_ROFS, 355 NFSERR_NAMETOL, 356 NFSERR_DQUOT, 357 NFSERR_STALE, 358 NFSERR_BADHANDLE, 359 NFSERR_NOTSUPP, 360 NFSERR_SERVERFAULT, 361 0, 362 }; 363 364 static short nfsv3err_mknod[] = { 365 NFSERR_IO, 366 NFSERR_IO, 367 NFSERR_ACCES, 368 NFSERR_EXIST, 369 NFSERR_NOTDIR, 370 NFSERR_NOSPC, 371 NFSERR_ROFS, 372 NFSERR_NAMETOL, 373 NFSERR_DQUOT, 374 NFSERR_STALE, 375 NFSERR_BADHANDLE, 376 NFSERR_NOTSUPP, 377 NFSERR_SERVERFAULT, 378 NFSERR_BADTYPE, 379 0, 380 }; 381 382 static short nfsv3err_remove[] = { 383 NFSERR_IO, 384 NFSERR_NOENT, 385 NFSERR_IO, 386 NFSERR_ACCES, 387 NFSERR_NOTDIR, 388 NFSERR_ROFS, 389 NFSERR_NAMETOL, 390 NFSERR_STALE, 391 NFSERR_BADHANDLE, 392 NFSERR_SERVERFAULT, 393 0, 394 }; 395 396 static short nfsv3err_rmdir[] = { 397 NFSERR_IO, 398 NFSERR_NOENT, 399 NFSERR_IO, 400 NFSERR_ACCES, 401 NFSERR_EXIST, 402 NFSERR_NOTDIR, 403 NFSERR_INVAL, 404 NFSERR_ROFS, 405 NFSERR_NAMETOL, 406 NFSERR_NOTEMPTY, 407 NFSERR_STALE, 408 NFSERR_BADHANDLE, 409 NFSERR_NOTSUPP, 410 NFSERR_SERVERFAULT, 411 0, 412 }; 413 414 static short nfsv3err_rename[] = { 415 NFSERR_IO, 416 NFSERR_NOENT, 417 NFSERR_IO, 418 NFSERR_ACCES, 419 NFSERR_EXIST, 420 NFSERR_XDEV, 421 NFSERR_NOTDIR, 422 NFSERR_ISDIR, 423 NFSERR_INVAL, 424 NFSERR_NOSPC, 425 NFSERR_ROFS, 426 NFSERR_MLINK, 427 NFSERR_NAMETOL, 428 NFSERR_NOTEMPTY, 429 NFSERR_DQUOT, 430 NFSERR_STALE, 431 NFSERR_BADHANDLE, 432 NFSERR_NOTSUPP, 433 NFSERR_SERVERFAULT, 434 0, 435 }; 436 437 static short nfsv3err_link[] = { 438 NFSERR_IO, 439 NFSERR_IO, 440 NFSERR_ACCES, 441 NFSERR_EXIST, 442 NFSERR_XDEV, 443 NFSERR_NOTDIR, 444 NFSERR_INVAL, 445 NFSERR_NOSPC, 446 NFSERR_ROFS, 447 NFSERR_MLINK, 448 NFSERR_NAMETOL, 449 NFSERR_DQUOT, 450 NFSERR_STALE, 451 NFSERR_BADHANDLE, 452 NFSERR_NOTSUPP, 453 NFSERR_SERVERFAULT, 454 0, 455 }; 456 457 static short nfsv3err_readdir[] = { 458 NFSERR_IO, 459 NFSERR_IO, 460 NFSERR_ACCES, 461 NFSERR_NOTDIR, 462 NFSERR_STALE, 463 NFSERR_BADHANDLE, 464 NFSERR_BAD_COOKIE, 465 NFSERR_TOOSMALL, 466 NFSERR_SERVERFAULT, 467 0, 468 }; 469 470 static short nfsv3err_readdirplus[] = { 471 NFSERR_IO, 472 NFSERR_IO, 473 NFSERR_ACCES, 474 NFSERR_NOTDIR, 475 NFSERR_STALE, 476 NFSERR_BADHANDLE, 477 NFSERR_BAD_COOKIE, 478 NFSERR_NOTSUPP, 479 NFSERR_TOOSMALL, 480 NFSERR_SERVERFAULT, 481 0, 482 }; 483 484 static short nfsv3err_fsstat[] = { 485 NFSERR_IO, 486 NFSERR_IO, 487 NFSERR_STALE, 488 NFSERR_BADHANDLE, 489 NFSERR_SERVERFAULT, 490 0, 491 }; 492 493 static short nfsv3err_fsinfo[] = { 494 NFSERR_STALE, 495 NFSERR_STALE, 496 NFSERR_BADHANDLE, 497 NFSERR_SERVERFAULT, 498 0, 499 }; 500 501 static short nfsv3err_pathconf[] = { 502 NFSERR_STALE, 503 NFSERR_STALE, 504 NFSERR_BADHANDLE, 505 NFSERR_SERVERFAULT, 506 0, 507 }; 508 509 static short nfsv3err_commit[] = { 510 NFSERR_IO, 511 NFSERR_IO, 512 NFSERR_STALE, 513 NFSERR_BADHANDLE, 514 NFSERR_SERVERFAULT, 515 0, 516 }; 517 518 static short *nfsrv_v3errmap[] = { 519 nfsv3err_null, 520 nfsv3err_getattr, 521 nfsv3err_setattr, 522 nfsv3err_lookup, 523 nfsv3err_access, 524 nfsv3err_readlink, 525 nfsv3err_read, 526 nfsv3err_write, 527 nfsv3err_create, 528 nfsv3err_mkdir, 529 nfsv3err_symlink, 530 nfsv3err_mknod, 531 nfsv3err_remove, 532 nfsv3err_rmdir, 533 nfsv3err_rename, 534 nfsv3err_link, 535 nfsv3err_readdir, 536 nfsv3err_readdirplus, 537 nfsv3err_fsstat, 538 nfsv3err_fsinfo, 539 nfsv3err_pathconf, 540 nfsv3err_commit, 541 }; 542 543 #endif /* NFS_NOSERVER */ 544 545 /* 546 * This needs to return a monotonically increasing or close to monotonically 547 * increasing result, otherwise the write gathering queues won't work 548 * properly. 549 */ 550 u_quad_t 551 nfs_curusec(void) 552 { 553 struct timeval tv; 554 555 getmicrouptime(&tv); 556 return ((u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec); 557 } 558 559 /* 560 * Called once to initialize data structures... 561 */ 562 int 563 nfs_init(struct vfsconf *vfsp) 564 { 565 callout_init_mp(&nfs_timer_handle); 566 567 nfs_mount_type = vfsp->vfc_typenum; 568 nfsrtt.pos = 0; 569 rpc_vers = txdr_unsigned(RPC_VER2); 570 rpc_call = txdr_unsigned(RPC_CALL); 571 rpc_reply = txdr_unsigned(RPC_REPLY); 572 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 573 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 574 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 575 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 576 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 577 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 578 nfs_prog = txdr_unsigned(NFS_PROG); 579 nfs_true = txdr_unsigned(TRUE); 580 nfs_false = txdr_unsigned(FALSE); 581 nfs_xdrneg1 = txdr_unsigned(-1); 582 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 583 if (nfs_ticks < 1) 584 nfs_ticks = 1; 585 nfs_nhinit(); /* Init the nfsnode table */ 586 #ifndef NFS_NOSERVER 587 nfsrv_init(0); /* Init server data structures */ 588 nfsrv_initcache(); /* Init the server request cache */ 589 #endif 590 591 /* 592 * Mainly for vkernel operation. If memory is severely limited 593 */ 594 if (nfs_maxasyncbio > nmbclusters * MCLBYTES / NFS_MAXDATA / 3) 595 nfs_maxasyncbio = nmbclusters * MCLBYTES / NFS_MAXDATA / 3; 596 if (nfs_maxasyncbio < 4) 597 nfs_maxasyncbio = 4; 598 599 /* 600 * Initialize reply list and start timer 601 */ 602 nfs_timer_callout(0); 603 604 #if 1 /* XXX this isn't really needed */ 605 nfs_prev_nfssvc_sy_narg = sysent[SYS_nfssvc].sy_narg; 606 sysent[SYS_nfssvc].sy_narg = 2; 607 #endif 608 nfs_prev_nfssvc_sy_call = sysent[SYS_nfssvc].sy_call; 609 sysent[SYS_nfssvc].sy_call = (sy_call_t *)sys_nfssvc; 610 611 nfs_pbuf_freecnt = nswbuf_kva / 2 + 1; 612 613 return (0); 614 } 615 616 int 617 nfs_uninit(struct vfsconf *vfsp) 618 { 619 callout_stop(&nfs_timer_handle); 620 nfs_mount_type = -1; 621 sysent[SYS_nfssvc].sy_narg = nfs_prev_nfssvc_sy_narg; 622 sysent[SYS_nfssvc].sy_call = nfs_prev_nfssvc_sy_call; 623 nfs_nhdestroy(); /* Destroy the nfsnode table */ 624 #ifndef NFS_NOSERVER 625 nfsrv_destroycache(); /* Destroy the server request cache */ 626 #endif 627 return (0); 628 } 629 630 /* 631 * Attribute cache routines. 632 * nfs_loadattrcache() - loads or updates the cache contents from attributes 633 * that are on the mbuf list 634 * nfs_getattrcache() - returns valid attributes if found in cache, returns 635 * error otherwise 636 */ 637 638 /* 639 * Load the attribute cache (that lives in the nfsnode entry) with 640 * the values on the mbuf list. Load *vaper with the attributes. vaper 641 * may be NULL. 642 * 643 * As a side effect n_mtime, which we use to determine if the file was 644 * modified by some other host, is set to the attribute timestamp and 645 * NRMODIFIED is set if the two values differ. 646 * 647 * WARNING: the mtime loaded into vaper does not necessarily represent 648 * n_mtime or n_attr.mtime due to NACC and NUPD. 649 */ 650 int 651 nfs_loadattrcache(struct vnode *vp, struct mbuf **mdp, caddr_t *dposp, 652 struct vattr *vaper, int lattr_flags) 653 { 654 struct vattr *vap; 655 struct nfs_fattr *fp; 656 struct nfsnode *np; 657 int32_t t1; 658 caddr_t cp2; 659 int error = 0; 660 int rmajor, rminor; 661 dev_t rdev; 662 struct mbuf *md; 663 enum vtype vtyp; 664 u_short vmode; 665 struct timespec mtime; 666 int v3 = NFS_ISV3(vp); 667 668 md = *mdp; 669 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 670 if ((error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) != 0) 671 return (error); 672 fp = (struct nfs_fattr *)cp2; 673 if (v3) { 674 vtyp = nfsv3tov_type(fp->fa_type); 675 vmode = fxdr_unsigned(u_short, fp->fa_mode); 676 rmajor = (int)fxdr_unsigned(int, fp->fa3_rdev.specdata1); 677 rminor = (int)fxdr_unsigned(int, fp->fa3_rdev.specdata2); 678 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 679 } else { 680 vtyp = nfsv2tov_type(fp->fa_type); 681 vmode = fxdr_unsigned(u_short, fp->fa_mode); 682 /* 683 * XXX 684 * 685 * The duplicate information returned in fa_type and fa_mode 686 * is an ambiguity in the NFS version 2 protocol. 687 * 688 * VREG should be taken literally as a regular file. If a 689 * server intents to return some type information differently 690 * in the upper bits of the mode field (e.g. for sockets, or 691 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 692 * leave the examination of the mode bits even in the VREG 693 * case to avoid breakage for bogus servers, but we make sure 694 * that there are actually type bits set in the upper part of 695 * fa_mode (and failing that, trust the va_type field). 696 * 697 * NFSv3 cleared the issue, and requires fa_mode to not 698 * contain any type information (while also introduing sockets 699 * and FIFOs for fa_type). 700 */ 701 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 702 vtyp = IFTOVT(vmode); 703 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 704 rmajor = umajor(rdev); 705 rminor = uminor(rdev); 706 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 707 708 /* 709 * Really ugly NFSv2 kludge. 710 */ 711 if (vtyp == VCHR && rdev == (dev_t)0xffffffff) 712 vtyp = VFIFO; 713 } 714 715 /* 716 * If v_type == VNON it is a new node, so fill in the v_type, 717 * n_mtime fields. Check to see if it represents a special 718 * device, and if so, check for a possible alias. Once the 719 * correct vnode has been obtained, fill in the rest of the 720 * information. 721 */ 722 np = VTONFS(vp); 723 if (vp->v_type != vtyp) { 724 nfs_setvtype(vp, vtyp); 725 if (vp->v_type == VFIFO) { 726 vp->v_ops = &vp->v_mount->mnt_vn_fifo_ops; 727 } else if (vp->v_type == VCHR || vp->v_type == VBLK) { 728 vp->v_ops = &vp->v_mount->mnt_vn_spec_ops; 729 addaliasu(vp, rmajor, rminor); 730 } else { 731 vp->v_ops = &vp->v_mount->mnt_vn_use_ops; 732 } 733 np->n_mtime = mtime.tv_sec; 734 } else if (np->n_mtime != mtime.tv_sec) { 735 /* 736 * If we haven't modified the file locally and the server 737 * timestamp does not match, then the server probably 738 * modified the file. We must flag this condition so 739 * the proper syncnronization can be done. We do not 740 * try to synchronize the state here because that 741 * could lead to an endless recursion. 742 * 743 * XXX loadattrcache can be set during the reply to a write, 744 * before the write timestamp is properly processed. To 745 * avoid unconditionally setting the rmodified bit (which 746 * has the effect of flushing the cache), we only do this 747 * check if the lmodified bit is not set. 748 */ 749 np->n_mtime = mtime.tv_sec; 750 if ((lattr_flags & NFS_LATTR_NOMTIMECHECK) == 0) 751 np->n_flag |= NRMODIFIED; 752 } 753 vap = &np->n_vattr; 754 vap->va_type = vtyp; 755 vap->va_mode = (vmode & 07777); 756 vap->va_rmajor = rmajor; 757 vap->va_rminor = rminor; 758 vap->va_mtime = mtime; 759 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 760 if (v3) { 761 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 762 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 763 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 764 vap->va_size = fxdr_hyper(&fp->fa3_size); 765 vap->va_blocksize = NFS_FABLKSIZE; 766 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 767 vap->va_fileid = fxdr_hyper(&fp->fa3_fileid); 768 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 769 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 770 vap->va_flags = 0; 771 vap->va_filerev = 0; 772 } else { 773 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 774 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 775 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 776 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 777 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); 778 vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) 779 * NFS_FABLKSIZE; 780 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 781 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 782 vap->va_flags = 0; 783 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 784 fp->fa2_ctime.nfsv2_sec); 785 vap->va_ctime.tv_nsec = 0; 786 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 787 vap->va_filerev = 0; 788 } 789 np->n_attrstamp = time_uptime; 790 if (vap->va_size != np->n_size) { 791 if (vap->va_type == VREG) { 792 /* 793 * Get rid of all the junk we had before and just 794 * set NRMODIFIED if NLMODIFIED is 0. Depend on 795 * occassionally flushing our dirty buffers to 796 * clear both the NLMODIFIED and NRMODIFIED flags. 797 */ 798 if ((np->n_flag & NLMODIFIED) == 0) 799 np->n_flag |= NRMODIFIED; 800 #if 0 801 if ((lattr_flags & NFS_LATTR_NOSHRINK) && 802 vap->va_size < np->n_size) { 803 /* 804 * We've been told not to shrink the file; 805 * zero np->n_attrstamp to indicate that 806 * the attributes are stale. 807 * 808 * This occurs primarily due to recursive 809 * NFS ops that are executed during periods 810 * where we cannot safely reduce the size of 811 * the file. 812 * 813 * Additionally, write rpcs are broken down 814 * into buffers and np->n_size is 815 * pre-extended. Setting NRMODIFIED here 816 * can result in n_size getting reset to a 817 * lower value, which is NOT what we want. 818 * XXX this needs to be cleaned up a lot 819 * more. 820 */ 821 vap->va_size = np->n_size; 822 np->n_attrstamp = 0; 823 if ((np->n_flag & NLMODIFIED) == 0) 824 np->n_flag |= NRMODIFIED; 825 } else if (np->n_flag & NLMODIFIED) { 826 /* 827 * We've modified the file: Use the larger 828 * of our size, and the server's size. At 829 * this point the cache coherency is all 830 * shot to hell. To try to handle multiple 831 * clients appending to the file at the same 832 * time mark that the server has changed 833 * the file if the server's notion of the 834 * file size is larger then our notion. 835 * 836 * XXX this needs work. 837 */ 838 if (vap->va_size < np->n_size) { 839 vap->va_size = np->n_size; 840 } else { 841 np->n_size = vap->va_size; 842 np->n_flag |= NRMODIFIED; 843 } 844 } else { 845 /* 846 * Someone changed the file's size on the 847 * server and there are no local changes 848 * to get in the way, set the size and mark 849 * it. 850 */ 851 np->n_size = vap->va_size; 852 np->n_flag |= NRMODIFIED; 853 } 854 nvnode_pager_setsize(vp, np->n_size, XXX); 855 #endif 856 } else { 857 np->n_size = vap->va_size; 858 } 859 } 860 if (vaper != NULL) { 861 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 862 if (np->n_flag & NCHG) { 863 if (np->n_flag & NACC) 864 vaper->va_atime = np->n_atim; 865 if (np->n_flag & NUPD) 866 vaper->va_mtime = np->n_mtim; 867 } 868 } 869 return (0); 870 } 871 872 #ifdef NFS_ACDEBUG 873 #include <sys/sysctl.h> 874 SYSCTL_DECL(_vfs_nfs); 875 static int nfs_acdebug; 876 SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, ""); 877 #endif 878 879 /* 880 * Check the time stamp 881 * If the cache is valid, copy contents to *vap and return 0 882 * otherwise return an error 883 */ 884 int 885 nfs_getattrcache(struct vnode *vp, struct vattr *vaper) 886 { 887 struct nfsnode *np; 888 struct vattr *vap; 889 struct nfsmount *nmp; 890 int timeo; 891 892 np = VTONFS(vp); 893 vap = &np->n_vattr; 894 nmp = VFSTONFS(vp->v_mount); 895 896 /* 897 * Dynamic timeout based on how recently the file was modified. 898 * n_mtime is always valid. 899 */ 900 timeo = (get_approximate_time_t() - np->n_mtime) / 60; 901 902 #ifdef NFS_ACDEBUG 903 if (nfs_acdebug>1) 904 kprintf("nfs_getattrcache: initial timeo = %d\n", timeo); 905 #endif 906 907 if (vap->va_type == VDIR) { 908 if ((np->n_flag & NLMODIFIED) || timeo < nmp->nm_acdirmin) 909 timeo = nmp->nm_acdirmin; 910 else if (timeo > nmp->nm_acdirmax) 911 timeo = nmp->nm_acdirmax; 912 } else { 913 if ((np->n_flag & NLMODIFIED) || timeo < nmp->nm_acregmin) 914 timeo = nmp->nm_acregmin; 915 else if (timeo > nmp->nm_acregmax) 916 timeo = nmp->nm_acregmax; 917 } 918 919 #ifdef NFS_ACDEBUG 920 if (nfs_acdebug > 2) 921 kprintf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n", 922 nmp->nm_acregmin, nmp->nm_acregmax, 923 nmp->nm_acdirmin, nmp->nm_acdirmax); 924 925 if (nfs_acdebug) 926 kprintf("nfs_getattrcache: age = %d; final timeo = %d\n", 927 (int)(time_uptime - np->n_attrstamp), timeo); 928 #endif 929 930 if (np->n_attrstamp == 0 || (time_uptime - np->n_attrstamp) >= timeo) { 931 nfsstats.attrcache_misses++; 932 return (ENOENT); 933 } 934 nfsstats.attrcache_hits++; 935 936 /* 937 * Our attribute cache can be stale due to modifications made on 938 * this host. XXX this is a bad hack. We need a more deterministic 939 * means of finding out which np fields are valid verses attr cache 940 * fields. We really should update the vattr info on the fly when 941 * making local changes. 942 */ 943 if (vap->va_size != np->n_size) { 944 if (vap->va_type == VREG) { 945 if (np->n_flag & NLMODIFIED) 946 vap->va_size = np->n_size; 947 nfs_meta_setsize(vp, curthread, vap->va_size, 0); 948 } else { 949 np->n_size = vap->va_size; 950 } 951 } 952 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 953 if (np->n_flag & NCHG) { 954 if (np->n_flag & NACC) 955 vaper->va_atime = np->n_atim; 956 if (np->n_flag & NUPD) 957 vaper->va_mtime = np->n_mtim; 958 } 959 return (0); 960 } 961 962 #ifndef NFS_NOSERVER 963 964 /* 965 * Set up nameidata for a lookup() call and do it. 966 * 967 * If pubflag is set, this call is done for a lookup operation on the 968 * public filehandle. In that case we allow crossing mountpoints and 969 * absolute pathnames. However, the caller is expected to check that 970 * the lookup result is within the public fs, and deny access if 971 * it is not. 972 * 973 * dirp may be set whether an error is returned or not, and must be 974 * released by the caller. 975 * 976 * On return nd->nl_nch usually points to the target ncp, which may represent 977 * a negative hit. 978 * 979 * NOTE: the caller must call nlookup_done(nd) unconditionally on return 980 * to cleanup. 981 */ 982 int 983 nfs_namei(struct nlookupdata *nd, struct ucred *cred, int nflags, 984 struct vnode **dvpp, struct vnode **vpp, 985 fhandle_t *fhp, int len, 986 struct nfssvc_sock *slp, struct sockaddr *nam, struct mbuf **mdp, 987 caddr_t *dposp, struct vnode **dirpp, struct thread *td, 988 int kerbflag, int pubflag) 989 { 990 int i, rem; 991 struct mbuf *md; 992 char *fromcp, *tocp, *cp; 993 char *namebuf; 994 struct nchandle nch; 995 struct vnode *dp; 996 struct mount *mp; 997 int error, rdonly; 998 int isretry; 999 1000 /* 1001 * Check retry case 1002 */ 1003 if (nd->nl_flags & NLC_HASBUF) { 1004 namebuf = nd->nl_path; 1005 nd->nl_flags &= ~NLC_HASBUF; 1006 nd->nl_path = NULL; 1007 isretry = 1; 1008 } else { 1009 namebuf = objcache_get(namei_oc, M_WAITOK); 1010 isretry = 0; 1011 } 1012 *dirpp = NULL; 1013 1014 /* 1015 * Copy the name from the mbuf list to namebuf. 1016 */ 1017 if (isretry == 0) { 1018 fromcp = *dposp; 1019 tocp = namebuf; 1020 md = *mdp; 1021 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1022 1023 for (i = 0; i < len; i++) { 1024 while (rem == 0) { 1025 md = md->m_next; 1026 if (md == NULL) { 1027 error = EBADRPC; 1028 goto out; 1029 } 1030 fromcp = mtod(md, caddr_t); 1031 rem = md->m_len; 1032 } 1033 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1034 error = EACCES; 1035 goto out; 1036 } 1037 *tocp++ = *fromcp++; 1038 rem--; 1039 } 1040 *tocp = '\0'; 1041 *mdp = md; 1042 *dposp = fromcp; 1043 len = nfsm_rndup(len)-len; 1044 if (len > 0) { 1045 if (rem >= len) 1046 *dposp += len; 1047 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1048 goto out; 1049 } 1050 } 1051 1052 /* 1053 * Extract and set starting directory. The returned dp is refd 1054 * but not locked. 1055 */ 1056 error = nfsrv_fhtovp(fhp, FALSE, &mp, &dp, cred, slp, 1057 nam, &rdonly, kerbflag, pubflag); 1058 if (error) 1059 goto out; 1060 if (dp->v_type != VDIR) { 1061 vrele(dp); 1062 error = ENOTDIR; 1063 goto out; 1064 } 1065 1066 /* 1067 * Set return directory. Reference to dp is implicitly transfered 1068 * to the returned pointer. This must be set before we potentially 1069 * goto out below. 1070 */ 1071 *dirpp = dp; 1072 1073 /* 1074 * read-only - NLC_DELETE, NLC_RENAME_DST are disallowed. NLC_CREATE 1075 * is passed through to nlookup() and will be disallowed 1076 * if the file does not already exist. 1077 */ 1078 if (rdonly) { 1079 nflags |= NLC_NFS_RDONLY; 1080 if (nflags & (NLC_DELETE | NLC_RENAME_DST)) { 1081 error = EROFS; 1082 goto out; 1083 } 1084 } 1085 1086 /* 1087 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1088 * and the 'native path' indicator. 1089 */ 1090 if (pubflag) { 1091 cp = objcache_get(namei_oc, M_WAITOK); 1092 fromcp = namebuf; 1093 tocp = cp; 1094 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1095 switch ((unsigned char)*fromcp) { 1096 case WEBNFS_NATIVE_CHAR: 1097 /* 1098 * 'Native' path for us is the same 1099 * as a path according to the NFS spec, 1100 * just skip the escape char. 1101 */ 1102 fromcp++; 1103 break; 1104 /* 1105 * More may be added in the future, range 0x80-0xff 1106 */ 1107 default: 1108 error = EIO; 1109 objcache_put(namei_oc, cp); 1110 goto out; 1111 } 1112 } 1113 /* 1114 * Translate the '%' escapes, URL-style. 1115 */ 1116 while (*fromcp != '\0') { 1117 if (*fromcp == WEBNFS_ESC_CHAR) { 1118 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1119 fromcp++; 1120 *tocp++ = HEXSTRTOI(fromcp); 1121 fromcp += 2; 1122 continue; 1123 } else { 1124 error = ENOENT; 1125 objcache_put(namei_oc, cp); 1126 goto out; 1127 } 1128 } else 1129 *tocp++ = *fromcp++; 1130 } 1131 *tocp = '\0'; 1132 objcache_put(namei_oc, namebuf); 1133 namebuf = cp; 1134 } 1135 1136 /* 1137 * Setup for search. We need to get a start directory from dp. Note 1138 * that dp is ref'd, but we no longer 'own' the ref (*dirpp owns it). 1139 */ 1140 if (pubflag == 0) { 1141 nflags |= NLC_NFS_NOSOFTLINKTRAV; 1142 nflags |= NLC_NOCROSSMOUNT; 1143 } 1144 1145 /* 1146 * We need a starting ncp from the directory vnode dp. dp must not 1147 * be locked. The returned ncp will be refd but not locked. 1148 * 1149 * If no suitable ncp is found we instruct cache_fromdvp() to create 1150 * one. If this fails the directory has probably been removed while 1151 * the target was chdir'd into it and any further lookup will fail. 1152 */ 1153 if ((error = cache_fromdvp(dp, cred, 1, &nch)) != 0) 1154 goto out; 1155 nlookup_init_raw(nd, namebuf, UIO_SYSSPACE, nflags, cred, &nch); 1156 cache_drop(&nch); 1157 1158 /* 1159 * Ok, do the lookup. 1160 */ 1161 error = nlookup(nd); 1162 1163 /* 1164 * If no error occured return the requested dvpp and vpp. If 1165 * NLC_CREATE was specified nd->nl_nch may represent a negative 1166 * cache hit in which case we do not attempt to obtain the vp. 1167 */ 1168 if (error == 0) { 1169 if (dvpp) { 1170 if (nd->nl_nch.ncp->nc_parent) { 1171 nch = nd->nl_nch; 1172 nch.ncp = nch.ncp->nc_parent; 1173 cache_hold(&nch); 1174 cache_lock(&nch); 1175 error = cache_vget(&nch, nd->nl_cred, 1176 LK_EXCLUSIVE, dvpp); 1177 cache_put(&nch); 1178 } else { 1179 error = ENXIO; 1180 } 1181 } 1182 if (vpp && nd->nl_nch.ncp->nc_vp) { 1183 error = cache_vget(&nd->nl_nch, nd->nl_cred, LK_EXCLUSIVE, vpp); 1184 } 1185 if (error) { 1186 if (dvpp && *dvpp) { 1187 vput(*dvpp); 1188 *dvpp = NULL; 1189 } 1190 if (vpp && *vpp) { 1191 vput(*vpp); 1192 *vpp = NULL; 1193 } 1194 } 1195 } 1196 1197 /* 1198 * Finish up. 1199 */ 1200 out: 1201 objcache_put(namei_oc, namebuf); 1202 return (error); 1203 } 1204 1205 /* 1206 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1207 * - look up fsid in mount list (if not found ret error) 1208 * - get vp and export rights by calling VFS_FHTOVP() 1209 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1210 * - if not lockflag unlock it with vn_unlock() 1211 */ 1212 int 1213 nfsrv_fhtovp(fhandle_t *fhp, int lockflag, 1214 struct mount **mpp, struct vnode **vpp, 1215 struct ucred *cred, struct nfssvc_sock *slp, struct sockaddr *nam, 1216 int *rdonlyp, int kerbflag, int pubflag) 1217 { 1218 struct mount *mp; 1219 int i; 1220 struct ucred *credanon; 1221 int error, exflags; 1222 #ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */ 1223 struct sockaddr_int *saddr; 1224 #endif 1225 1226 *vpp = NULL; 1227 *mpp = NULL; 1228 1229 if (nfs_ispublicfh(fhp)) { 1230 if (!pubflag || !nfs_pub.np_valid) 1231 return (ESTALE); 1232 fhp = &nfs_pub.np_handle; 1233 } 1234 1235 mp = *mpp = vfs_getvfs(&fhp->fh_fsid); 1236 if (mp == NULL) 1237 return (ESTALE); 1238 error = VFS_CHECKEXP(mp, nam, &exflags, &credanon); 1239 if (error) { 1240 mount_drop(mp); 1241 return (error); 1242 } 1243 error = VFS_FHTOVP(mp, NULL, &fhp->fh_fid, vpp); 1244 mount_drop(mp); 1245 if (error) 1246 return (ESTALE); 1247 #ifdef MNT_EXNORESPORT 1248 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 1249 saddr = (struct sockaddr_in *)nam; 1250 if (saddr->sin_family == AF_INET && 1251 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 1252 vput(*vpp); 1253 *vpp = NULL; 1254 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1255 } 1256 } 1257 #endif 1258 /* 1259 * Check/setup credentials. 1260 */ 1261 if (exflags & MNT_EXKERB) { 1262 if (!kerbflag) { 1263 vput(*vpp); 1264 *vpp = NULL; 1265 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1266 } 1267 } else if (kerbflag) { 1268 vput(*vpp); 1269 *vpp = NULL; 1270 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1271 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1272 cred->cr_uid = credanon->cr_uid; 1273 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1274 cred->cr_groups[i] = credanon->cr_groups[i]; 1275 cred->cr_ngroups = i; 1276 } 1277 if (exflags & MNT_EXRDONLY) 1278 *rdonlyp = 1; 1279 else 1280 *rdonlyp = 0; 1281 1282 if (!lockflag) 1283 vn_unlock(*vpp); 1284 return (0); 1285 } 1286 1287 /* 1288 * WebNFS: check if a filehandle is a public filehandle. For v3, this 1289 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 1290 * transformed this to all zeroes in both cases, so check for it. 1291 */ 1292 int 1293 nfs_ispublicfh(fhandle_t *fhp) 1294 { 1295 char *cp = (char *)fhp; 1296 int i; 1297 1298 for (i = 0; i < NFSX_V3FH; i++) 1299 if (*cp++ != 0) 1300 return (FALSE); 1301 return (TRUE); 1302 } 1303 1304 #endif /* NFS_NOSERVER */ 1305 /* 1306 * This function compares two net addresses by family and returns TRUE 1307 * if they are the same host. 1308 * If there is any doubt, return FALSE. 1309 * The AF_INET family is handled as a special case so that address mbufs 1310 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1311 */ 1312 int 1313 netaddr_match(int family, union nethostaddr *haddr, struct sockaddr *nam) 1314 { 1315 struct sockaddr_in *inetaddr; 1316 1317 switch (family) { 1318 case AF_INET: 1319 inetaddr = (struct sockaddr_in *)nam; 1320 if (inetaddr->sin_family == AF_INET && 1321 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1322 return (1); 1323 break; 1324 default: 1325 break; 1326 } 1327 return (0); 1328 } 1329 1330 static nfsuint64 nfs_nullcookie = { { 0, 0 } }; 1331 /* 1332 * This function finds the directory cookie that corresponds to the 1333 * logical byte offset given. 1334 */ 1335 nfsuint64 * 1336 nfs_getcookie(struct nfsnode *np, off_t off, int add) 1337 { 1338 struct nfsdmap *dp, *dp2; 1339 int pos; 1340 1341 pos = (uoff_t)off / NFS_DIRBLKSIZ; 1342 if (pos == 0 || off < 0) { 1343 #ifdef DIAGNOSTIC 1344 if (add) 1345 panic("nfs getcookie add at <= 0"); 1346 #endif 1347 return (&nfs_nullcookie); 1348 } 1349 pos--; 1350 dp = np->n_cookies.lh_first; 1351 if (!dp) { 1352 if (add) { 1353 dp = kmalloc(sizeof(struct nfsdmap), M_NFSDIROFF, 1354 M_WAITOK); 1355 dp->ndm_eocookie = 0; 1356 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 1357 } else 1358 return (NULL); 1359 } 1360 while (pos >= NFSNUMCOOKIES) { 1361 pos -= NFSNUMCOOKIES; 1362 if (dp->ndm_list.le_next) { 1363 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 1364 pos >= dp->ndm_eocookie) 1365 return (NULL); 1366 dp = dp->ndm_list.le_next; 1367 } else if (add) { 1368 dp2 = kmalloc(sizeof(struct nfsdmap), M_NFSDIROFF, 1369 M_WAITOK); 1370 dp2->ndm_eocookie = 0; 1371 LIST_INSERT_AFTER(dp, dp2, ndm_list); 1372 dp = dp2; 1373 } else 1374 return (NULL); 1375 } 1376 if (pos >= dp->ndm_eocookie) { 1377 if (add) 1378 dp->ndm_eocookie = pos + 1; 1379 else 1380 return (NULL); 1381 } 1382 return (&dp->ndm_cookies[pos]); 1383 } 1384 1385 /* 1386 * Invalidate cached directory information, except for the actual directory 1387 * blocks (which are invalidated separately). 1388 * Done mainly to avoid the use of stale offset cookies. 1389 */ 1390 void 1391 nfs_invaldir(struct vnode *vp) 1392 { 1393 struct nfsnode *np = VTONFS(vp); 1394 1395 #ifdef DIAGNOSTIC 1396 if (vp->v_type != VDIR) 1397 panic("nfs: invaldir not dir"); 1398 #endif 1399 np->n_direofoffset = 0; 1400 np->n_cookieverf.nfsuquad[0] = 0; 1401 np->n_cookieverf.nfsuquad[1] = 0; 1402 if (np->n_cookies.lh_first) 1403 np->n_cookies.lh_first->ndm_eocookie = 0; 1404 } 1405 1406 /* 1407 * Set the v_type field for an NFS client's vnode and initialize for 1408 * buffer cache operations if necessary. 1409 */ 1410 void 1411 nfs_setvtype(struct vnode *vp, enum vtype vtyp) 1412 { 1413 vp->v_type = vtyp; 1414 1415 switch(vtyp) { 1416 case VREG: 1417 case VDIR: 1418 case VLNK: 1419 /* 1420 * Needs VMIO, size not yet known, and blocksize 1421 * is not really relevant if we are passing a 1422 * filesize of 0. 1423 */ 1424 vinitvmio(vp, 0, PAGE_SIZE, -1); 1425 break; 1426 default: 1427 break; 1428 } 1429 } 1430 1431 /* 1432 * The write verifier has changed (probably due to a server reboot), so all 1433 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 1434 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 1435 * and B_CLUSTEROK flags. Once done the new write verifier can be set for the 1436 * mount point. 1437 * 1438 * B_CLUSTEROK must be cleared along with B_NEEDCOMMIT because stage 1 data 1439 * writes are not clusterable. 1440 */ 1441 1442 static int nfs_clearcommit_bp(struct buf *bp, void *data __unused); 1443 static int nfs_clearcommit_callback(struct mount *mp, struct vnode *vp, 1444 void *data __unused); 1445 1446 void 1447 nfs_clearcommit(struct mount *mp) 1448 { 1449 vsyncscan(mp, VMSC_NOWAIT, nfs_clearcommit_callback, NULL); 1450 } 1451 1452 static int 1453 nfs_clearcommit_callback(struct mount *mp, struct vnode *vp, 1454 void *data __unused) 1455 { 1456 lwkt_gettoken(&vp->v_token); 1457 RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL, 1458 nfs_clearcommit_bp, NULL); 1459 lwkt_reltoken(&vp->v_token); 1460 1461 return(0); 1462 } 1463 1464 static int 1465 nfs_clearcommit_bp(struct buf *bp, void *data __unused) 1466 { 1467 if (BUF_LOCKINUSE(bp) == 0 && 1468 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) 1469 == (B_DELWRI | B_NEEDCOMMIT)) { 1470 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 1471 } 1472 return(0); 1473 } 1474 1475 #ifndef NFS_NOSERVER 1476 /* 1477 * Map errnos to NFS error numbers. For Version 3 also filter out error 1478 * numbers not specified for the associated procedure. 1479 */ 1480 int 1481 nfsrv_errmap(struct nfsrv_descript *nd, int err) 1482 { 1483 short *defaulterrp, *errp; 1484 1485 if (nd->nd_flag & ND_NFSV3) { 1486 if (nd->nd_procnum <= NFSPROC_COMMIT) { 1487 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 1488 while (*++errp) { 1489 if (*errp == err) 1490 return (err); 1491 else if (*errp > err) 1492 break; 1493 } 1494 return ((int)*defaulterrp); 1495 } else 1496 return (err & 0xffff); 1497 } 1498 if (err <= ELAST) 1499 return ((int)nfsrv_v2errmap[err - 1]); 1500 return (NFSERR_IO); 1501 } 1502 1503 /* 1504 * Sort the group list in increasing numerical order. 1505 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 1506 * that used to be here.) 1507 */ 1508 void 1509 nfsrvw_sort(gid_t *list, int num) 1510 { 1511 int i, j; 1512 gid_t v; 1513 1514 /* Insertion sort. */ 1515 for (i = 1; i < num; i++) { 1516 v = list[i]; 1517 /* find correct slot for value v, moving others up */ 1518 for (j = i; --j >= 0 && v < list[j];) 1519 list[j + 1] = list[j]; 1520 list[j + 1] = v; 1521 } 1522 } 1523 1524 /* 1525 * copy credentials making sure that the result can be compared with bcmp(). 1526 */ 1527 void 1528 nfsrv_setcred(struct ucred *incred, struct ucred *outcred) 1529 { 1530 int i; 1531 1532 bzero((caddr_t)outcred, sizeof (struct ucred)); 1533 outcred->cr_ref = 1; 1534 outcred->cr_uid = incred->cr_uid; 1535 outcred->cr_ngroups = incred->cr_ngroups; 1536 for (i = 0; i < incred->cr_ngroups; i++) 1537 outcred->cr_groups[i] = incred->cr_groups[i]; 1538 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 1539 } 1540 #endif /* NFS_NOSERVER */ 1541 1542 /* 1543 * Hold a ucred in nfs_node. Discard prison information, otherwise 1544 * prisons might stick around indefinitely due to NFS node caching. 1545 * 1546 * XXX may cause a large number of cred structures in the system 1547 * to accumulate. 1548 */ 1549 struct ucred * 1550 nfs_crhold(struct ucred *cred) 1551 { 1552 if (cred) { 1553 if (cred->cr_prison) { 1554 cred = crdup_nocaps(cred); 1555 } else { 1556 cred = crhold(cred); 1557 } 1558 } 1559 return cred; 1560 } 1561 1562 /* 1563 * Return whether two ucreds are the same insofar as NFS cares about. 1564 */ 1565 int 1566 nfs_crsame(struct ucred *cr1, struct ucred *cr2) 1567 { 1568 if (cr1 != cr2) { 1569 if (cr1 == NULL || cr2 == NULL) 1570 return (cr1 == cr2); 1571 if (cr1->cr_uid != cr2->cr_uid || 1572 cr1->cr_ruid != cr2->cr_ruid || 1573 cr1->cr_rgid != cr2->cr_rgid || 1574 cr1->cr_ngroups != cr2->cr_ngroups) { 1575 return 0; 1576 } 1577 if (bcmp(cr1->cr_groups, cr2->cr_groups, 1578 cr1->cr_ngroups * sizeof(cr1->cr_groups[0])) != 0) { 1579 return 0; 1580 } 1581 } 1582 return 1; 1583 } 1584