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 MALLOC_DEFINE(M_NFSMOUNT, "NFS mount", "NFS mount"); 78 79 /* 80 * Data items converted to xdr at startup, since they are constant 81 * This is kinda hokey, but may save a little time doing byte swaps 82 */ 83 u_int32_t nfs_xdrneg1; 84 u_int32_t rpc_reply, rpc_msgdenied, rpc_mismatch, rpc_vers; 85 u_int32_t rpc_auth_unix, rpc_msgaccepted, rpc_call, rpc_autherr; 86 u_int32_t rpc_auth_kerb; 87 u_int32_t nfs_prog, nfs_true, nfs_false; 88 89 /* And other global data */ 90 static enum vtype nv2tov_type[8]= { 91 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON 92 }; 93 enum vtype nv3tov_type[8]= { 94 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO 95 }; 96 97 int nfs_ticks; 98 99 /* 100 * Protect master lists only. Primary protection uses the per-mount 101 * and per nfssvc_sock tokens. 102 */ 103 struct lwkt_token nfs_token = LWKT_TOKEN_INITIALIZER(unp_token); 104 105 static long nfs_pbuf_freecnt = -1; /* start out unlimited */ 106 107 struct nfsmount_head nfs_mountq = TAILQ_HEAD_INITIALIZER(nfs_mountq); 108 struct nfssvc_sockhead nfssvc_sockhead; 109 int nfssvc_sockhead_flag; 110 struct nfsd_head nfsd_head; 111 int nfsd_head_flag; 112 struct nfs_bufq nfs_bufq; 113 struct nqfhhashhead *nqfhhashtbl; 114 u_long nqfhhash; 115 116 static int nfs_prev_nfssvc_sy_narg; 117 static sy_call_t *nfs_prev_nfssvc_sy_call; 118 119 #ifndef NFS_NOSERVER 120 121 /* 122 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 123 */ 124 int nfsv3_procid[NFS_NPROCS] = { 125 NFSPROC_NULL, 126 NFSPROC_GETATTR, 127 NFSPROC_SETATTR, 128 NFSPROC_NOOP, 129 NFSPROC_LOOKUP, 130 NFSPROC_READLINK, 131 NFSPROC_READ, 132 NFSPROC_NOOP, 133 NFSPROC_WRITE, 134 NFSPROC_CREATE, 135 NFSPROC_REMOVE, 136 NFSPROC_RENAME, 137 NFSPROC_LINK, 138 NFSPROC_SYMLINK, 139 NFSPROC_MKDIR, 140 NFSPROC_RMDIR, 141 NFSPROC_READDIR, 142 NFSPROC_FSSTAT, 143 NFSPROC_NOOP, 144 NFSPROC_NOOP, 145 NFSPROC_NOOP, 146 NFSPROC_NOOP, 147 NFSPROC_NOOP, 148 NFSPROC_NOOP, 149 NFSPROC_NOOP, 150 NFSPROC_NOOP 151 }; 152 153 #endif /* NFS_NOSERVER */ 154 /* 155 * and the reverse mapping from generic to Version 2 procedure numbers 156 */ 157 int nfsv2_procid[NFS_NPROCS] = { 158 NFSV2PROC_NULL, 159 NFSV2PROC_GETATTR, 160 NFSV2PROC_SETATTR, 161 NFSV2PROC_LOOKUP, 162 NFSV2PROC_NOOP, 163 NFSV2PROC_READLINK, 164 NFSV2PROC_READ, 165 NFSV2PROC_WRITE, 166 NFSV2PROC_CREATE, 167 NFSV2PROC_MKDIR, 168 NFSV2PROC_SYMLINK, 169 NFSV2PROC_CREATE, 170 NFSV2PROC_REMOVE, 171 NFSV2PROC_RMDIR, 172 NFSV2PROC_RENAME, 173 NFSV2PROC_LINK, 174 NFSV2PROC_READDIR, 175 NFSV2PROC_NOOP, 176 NFSV2PROC_STATFS, 177 NFSV2PROC_NOOP, 178 NFSV2PROC_NOOP, 179 NFSV2PROC_NOOP, 180 NFSV2PROC_NOOP, 181 NFSV2PROC_NOOP, 182 NFSV2PROC_NOOP, 183 NFSV2PROC_NOOP, 184 }; 185 186 #ifndef NFS_NOSERVER 187 /* 188 * Maps errno values to nfs error numbers. 189 * Use NFSERR_IO as the catch all for ones not specifically defined in 190 * RFC 1094. 191 */ 192 static u_char nfsrv_v2errmap[ELAST] = { 193 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 194 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 195 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 196 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 197 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 198 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 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_IO, NFSERR_IO, NFSERR_IO, 205 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 206 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 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, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 210 NFSERR_IO /* << Last is 86 */ 211 }; 212 213 /* 214 * Maps errno values to nfs error numbers. 215 * Although it is not obvious whether or not NFS clients really care if 216 * a returned error value is in the specified list for the procedure, the 217 * safest thing to do is filter them appropriately. For Version 2, the 218 * X/Open XNFS document is the only specification that defines error values 219 * for each RPC (The RFC simply lists all possible error values for all RPCs), 220 * so I have decided to not do this for Version 2. 221 * The first entry is the default error return and the rest are the valid 222 * errors for that RPC in increasing numeric order. 223 */ 224 static short nfsv3err_null[] = { 225 0, 226 0, 227 }; 228 229 static short nfsv3err_getattr[] = { 230 NFSERR_IO, 231 NFSERR_IO, 232 NFSERR_STALE, 233 NFSERR_BADHANDLE, 234 NFSERR_SERVERFAULT, 235 0, 236 }; 237 238 static short nfsv3err_setattr[] = { 239 NFSERR_IO, 240 NFSERR_PERM, 241 NFSERR_IO, 242 NFSERR_ACCES, 243 NFSERR_INVAL, 244 NFSERR_NOSPC, 245 NFSERR_ROFS, 246 NFSERR_DQUOT, 247 NFSERR_STALE, 248 NFSERR_BADHANDLE, 249 NFSERR_NOT_SYNC, 250 NFSERR_SERVERFAULT, 251 0, 252 }; 253 254 static short nfsv3err_lookup[] = { 255 NFSERR_IO, 256 NFSERR_NOENT, 257 NFSERR_IO, 258 NFSERR_ACCES, 259 NFSERR_NOTDIR, 260 NFSERR_NAMETOL, 261 NFSERR_STALE, 262 NFSERR_BADHANDLE, 263 NFSERR_SERVERFAULT, 264 0, 265 }; 266 267 static short nfsv3err_access[] = { 268 NFSERR_IO, 269 NFSERR_IO, 270 NFSERR_STALE, 271 NFSERR_BADHANDLE, 272 NFSERR_SERVERFAULT, 273 0, 274 }; 275 276 static short nfsv3err_readlink[] = { 277 NFSERR_IO, 278 NFSERR_IO, 279 NFSERR_ACCES, 280 NFSERR_INVAL, 281 NFSERR_STALE, 282 NFSERR_BADHANDLE, 283 NFSERR_NOTSUPP, 284 NFSERR_SERVERFAULT, 285 0, 286 }; 287 288 static short nfsv3err_read[] = { 289 NFSERR_IO, 290 NFSERR_IO, 291 NFSERR_NXIO, 292 NFSERR_ACCES, 293 NFSERR_INVAL, 294 NFSERR_STALE, 295 NFSERR_BADHANDLE, 296 NFSERR_SERVERFAULT, 297 0, 298 }; 299 300 static short nfsv3err_write[] = { 301 NFSERR_IO, 302 NFSERR_IO, 303 NFSERR_ACCES, 304 NFSERR_INVAL, 305 NFSERR_FBIG, 306 NFSERR_NOSPC, 307 NFSERR_ROFS, 308 NFSERR_DQUOT, 309 NFSERR_STALE, 310 NFSERR_BADHANDLE, 311 NFSERR_SERVERFAULT, 312 0, 313 }; 314 315 static short nfsv3err_create[] = { 316 NFSERR_IO, 317 NFSERR_IO, 318 NFSERR_ACCES, 319 NFSERR_EXIST, 320 NFSERR_NOTDIR, 321 NFSERR_NOSPC, 322 NFSERR_ROFS, 323 NFSERR_NAMETOL, 324 NFSERR_DQUOT, 325 NFSERR_STALE, 326 NFSERR_BADHANDLE, 327 NFSERR_NOTSUPP, 328 NFSERR_SERVERFAULT, 329 0, 330 }; 331 332 static short nfsv3err_mkdir[] = { 333 NFSERR_IO, 334 NFSERR_IO, 335 NFSERR_ACCES, 336 NFSERR_EXIST, 337 NFSERR_NOTDIR, 338 NFSERR_NOSPC, 339 NFSERR_ROFS, 340 NFSERR_NAMETOL, 341 NFSERR_DQUOT, 342 NFSERR_STALE, 343 NFSERR_BADHANDLE, 344 NFSERR_NOTSUPP, 345 NFSERR_SERVERFAULT, 346 0, 347 }; 348 349 static short nfsv3err_symlink[] = { 350 NFSERR_IO, 351 NFSERR_IO, 352 NFSERR_ACCES, 353 NFSERR_EXIST, 354 NFSERR_NOTDIR, 355 NFSERR_NOSPC, 356 NFSERR_ROFS, 357 NFSERR_NAMETOL, 358 NFSERR_DQUOT, 359 NFSERR_STALE, 360 NFSERR_BADHANDLE, 361 NFSERR_NOTSUPP, 362 NFSERR_SERVERFAULT, 363 0, 364 }; 365 366 static short nfsv3err_mknod[] = { 367 NFSERR_IO, 368 NFSERR_IO, 369 NFSERR_ACCES, 370 NFSERR_EXIST, 371 NFSERR_NOTDIR, 372 NFSERR_NOSPC, 373 NFSERR_ROFS, 374 NFSERR_NAMETOL, 375 NFSERR_DQUOT, 376 NFSERR_STALE, 377 NFSERR_BADHANDLE, 378 NFSERR_NOTSUPP, 379 NFSERR_SERVERFAULT, 380 NFSERR_BADTYPE, 381 0, 382 }; 383 384 static short nfsv3err_remove[] = { 385 NFSERR_IO, 386 NFSERR_NOENT, 387 NFSERR_IO, 388 NFSERR_ACCES, 389 NFSERR_NOTDIR, 390 NFSERR_ROFS, 391 NFSERR_NAMETOL, 392 NFSERR_STALE, 393 NFSERR_BADHANDLE, 394 NFSERR_SERVERFAULT, 395 0, 396 }; 397 398 static short nfsv3err_rmdir[] = { 399 NFSERR_IO, 400 NFSERR_NOENT, 401 NFSERR_IO, 402 NFSERR_ACCES, 403 NFSERR_EXIST, 404 NFSERR_NOTDIR, 405 NFSERR_INVAL, 406 NFSERR_ROFS, 407 NFSERR_NAMETOL, 408 NFSERR_NOTEMPTY, 409 NFSERR_STALE, 410 NFSERR_BADHANDLE, 411 NFSERR_NOTSUPP, 412 NFSERR_SERVERFAULT, 413 0, 414 }; 415 416 static short nfsv3err_rename[] = { 417 NFSERR_IO, 418 NFSERR_NOENT, 419 NFSERR_IO, 420 NFSERR_ACCES, 421 NFSERR_EXIST, 422 NFSERR_XDEV, 423 NFSERR_NOTDIR, 424 NFSERR_ISDIR, 425 NFSERR_INVAL, 426 NFSERR_NOSPC, 427 NFSERR_ROFS, 428 NFSERR_MLINK, 429 NFSERR_NAMETOL, 430 NFSERR_NOTEMPTY, 431 NFSERR_DQUOT, 432 NFSERR_STALE, 433 NFSERR_BADHANDLE, 434 NFSERR_NOTSUPP, 435 NFSERR_SERVERFAULT, 436 0, 437 }; 438 439 static short nfsv3err_link[] = { 440 NFSERR_IO, 441 NFSERR_IO, 442 NFSERR_ACCES, 443 NFSERR_EXIST, 444 NFSERR_XDEV, 445 NFSERR_NOTDIR, 446 NFSERR_INVAL, 447 NFSERR_NOSPC, 448 NFSERR_ROFS, 449 NFSERR_MLINK, 450 NFSERR_NAMETOL, 451 NFSERR_DQUOT, 452 NFSERR_STALE, 453 NFSERR_BADHANDLE, 454 NFSERR_NOTSUPP, 455 NFSERR_SERVERFAULT, 456 0, 457 }; 458 459 static short nfsv3err_readdir[] = { 460 NFSERR_IO, 461 NFSERR_IO, 462 NFSERR_ACCES, 463 NFSERR_NOTDIR, 464 NFSERR_STALE, 465 NFSERR_BADHANDLE, 466 NFSERR_BAD_COOKIE, 467 NFSERR_TOOSMALL, 468 NFSERR_SERVERFAULT, 469 0, 470 }; 471 472 static short nfsv3err_readdirplus[] = { 473 NFSERR_IO, 474 NFSERR_IO, 475 NFSERR_ACCES, 476 NFSERR_NOTDIR, 477 NFSERR_STALE, 478 NFSERR_BADHANDLE, 479 NFSERR_BAD_COOKIE, 480 NFSERR_NOTSUPP, 481 NFSERR_TOOSMALL, 482 NFSERR_SERVERFAULT, 483 0, 484 }; 485 486 static short nfsv3err_fsstat[] = { 487 NFSERR_IO, 488 NFSERR_IO, 489 NFSERR_STALE, 490 NFSERR_BADHANDLE, 491 NFSERR_SERVERFAULT, 492 0, 493 }; 494 495 static short nfsv3err_fsinfo[] = { 496 NFSERR_STALE, 497 NFSERR_STALE, 498 NFSERR_BADHANDLE, 499 NFSERR_SERVERFAULT, 500 0, 501 }; 502 503 static short nfsv3err_pathconf[] = { 504 NFSERR_STALE, 505 NFSERR_STALE, 506 NFSERR_BADHANDLE, 507 NFSERR_SERVERFAULT, 508 0, 509 }; 510 511 static short nfsv3err_commit[] = { 512 NFSERR_IO, 513 NFSERR_IO, 514 NFSERR_STALE, 515 NFSERR_BADHANDLE, 516 NFSERR_SERVERFAULT, 517 0, 518 }; 519 520 static short *nfsrv_v3errmap[] = { 521 nfsv3err_null, 522 nfsv3err_getattr, 523 nfsv3err_setattr, 524 nfsv3err_lookup, 525 nfsv3err_access, 526 nfsv3err_readlink, 527 nfsv3err_read, 528 nfsv3err_write, 529 nfsv3err_create, 530 nfsv3err_mkdir, 531 nfsv3err_symlink, 532 nfsv3err_mknod, 533 nfsv3err_remove, 534 nfsv3err_rmdir, 535 nfsv3err_rename, 536 nfsv3err_link, 537 nfsv3err_readdir, 538 nfsv3err_readdirplus, 539 nfsv3err_fsstat, 540 nfsv3err_fsinfo, 541 nfsv3err_pathconf, 542 nfsv3err_commit, 543 }; 544 545 #endif /* NFS_NOSERVER */ 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_mp(&nfs_timer_handle); 568 nfsmount_objcache = objcache_create_simple(M_NFSMOUNT, sizeof(struct nfsmount)); 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_callout(0); 606 607 #if 1 /* XXX this isn't really needed */ 608 nfs_prev_nfssvc_sy_narg = sysent[SYS_nfssvc].sy_narg; 609 sysent[SYS_nfssvc].sy_narg = 2; 610 #endif 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 nfs_nhdestroy(); /* Destroy the nfsnode table */ 627 #ifndef NFS_NOSERVER 628 nfsrv_destroycache(); /* Destroy the server request cache */ 629 #endif 630 objcache_destroy(nfsmount_objcache); 631 return (0); 632 } 633 634 /* 635 * Attribute cache routines. 636 * nfs_loadattrcache() - loads or updates the cache contents from attributes 637 * that are on the mbuf list 638 * nfs_getattrcache() - returns valid attributes if found in cache, returns 639 * error otherwise 640 */ 641 642 /* 643 * Load the attribute cache (that lives in the nfsnode entry) with 644 * the values on the mbuf list. Load *vaper with the attributes. vaper 645 * may be NULL. 646 * 647 * As a side effect n_mtime, which we use to determine if the file was 648 * modified by some other host, is set to the attribute timestamp and 649 * NRMODIFIED is set if the two values differ. 650 * 651 * WARNING: the mtime loaded into vaper does not necessarily represent 652 * n_mtime or n_attr.mtime due to NACC and NUPD. 653 */ 654 int 655 nfs_loadattrcache(struct vnode *vp, struct mbuf **mdp, caddr_t *dposp, 656 struct vattr *vaper, int lattr_flags) 657 { 658 struct vattr *vap; 659 struct nfs_fattr *fp; 660 struct nfsnode *np; 661 int32_t t1; 662 caddr_t cp2; 663 int error = 0; 664 int rmajor, rminor; 665 dev_t rdev; 666 struct mbuf *md; 667 enum vtype vtyp; 668 u_short vmode; 669 struct timespec mtime; 670 int v3 = NFS_ISV3(vp); 671 672 md = *mdp; 673 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 674 if ((error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) != 0) 675 return (error); 676 fp = (struct nfs_fattr *)cp2; 677 if (v3) { 678 vtyp = nfsv3tov_type(fp->fa_type); 679 vmode = fxdr_unsigned(u_short, fp->fa_mode); 680 rmajor = (int)fxdr_unsigned(int, fp->fa3_rdev.specdata1); 681 rminor = (int)fxdr_unsigned(int, fp->fa3_rdev.specdata2); 682 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 683 } else { 684 vtyp = nfsv2tov_type(fp->fa_type); 685 vmode = fxdr_unsigned(u_short, fp->fa_mode); 686 /* 687 * XXX 688 * 689 * The duplicate information returned in fa_type and fa_mode 690 * is an ambiguity in the NFS version 2 protocol. 691 * 692 * VREG should be taken literally as a regular file. If a 693 * server intents to return some type information differently 694 * in the upper bits of the mode field (e.g. for sockets, or 695 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 696 * leave the examination of the mode bits even in the VREG 697 * case to avoid breakage for bogus servers, but we make sure 698 * that there are actually type bits set in the upper part of 699 * fa_mode (and failing that, trust the va_type field). 700 * 701 * NFSv3 cleared the issue, and requires fa_mode to not 702 * contain any type information (while also introduing sockets 703 * and FIFOs for fa_type). 704 */ 705 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 706 vtyp = IFTOVT(vmode); 707 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 708 rmajor = umajor(rdev); 709 rminor = uminor(rdev); 710 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 711 712 /* 713 * Really ugly NFSv2 kludge. 714 */ 715 if (vtyp == VCHR && rdev == (dev_t)0xffffffff) 716 vtyp = VFIFO; 717 } 718 719 /* 720 * If v_type == VNON it is a new node, so fill in the v_type, 721 * n_mtime fields. Check to see if it represents a special 722 * device, and if so, check for a possible alias. Once the 723 * correct vnode has been obtained, fill in the rest of the 724 * information. 725 */ 726 np = VTONFS(vp); 727 if (vp->v_type != vtyp) { 728 nfs_setvtype(vp, vtyp); 729 if (vp->v_type == VFIFO) { 730 vp->v_ops = &vp->v_mount->mnt_vn_fifo_ops; 731 } else if (vp->v_type == VCHR || vp->v_type == VBLK) { 732 vp->v_ops = &vp->v_mount->mnt_vn_spec_ops; 733 addaliasu(vp, rmajor, rminor); 734 } else { 735 vp->v_ops = &vp->v_mount->mnt_vn_use_ops; 736 } 737 np->n_mtime = mtime.tv_sec; 738 } else if (np->n_mtime != mtime.tv_sec) { 739 /* 740 * If we haven't modified the file locally and the server 741 * timestamp does not match, then the server probably 742 * modified the file. We must flag this condition so 743 * the proper syncnronization can be done. We do not 744 * try to synchronize the state here because that 745 * could lead to an endless recursion. 746 * 747 * XXX loadattrcache can be set during the reply to a write, 748 * before the write timestamp is properly processed. To 749 * avoid unconditionally setting the rmodified bit (which 750 * has the effect of flushing the cache), we only do this 751 * check if the lmodified bit is not set. 752 */ 753 np->n_mtime = mtime.tv_sec; 754 if ((lattr_flags & NFS_LATTR_NOMTIMECHECK) == 0) 755 np->n_flag |= NRMODIFIED; 756 } 757 vap = &np->n_vattr; 758 vap->va_type = vtyp; 759 vap->va_mode = (vmode & 07777); 760 vap->va_rmajor = rmajor; 761 vap->va_rminor = rminor; 762 vap->va_mtime = mtime; 763 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 764 if (v3) { 765 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 766 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 767 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 768 vap->va_size = fxdr_hyper(&fp->fa3_size); 769 vap->va_blocksize = NFS_FABLKSIZE; 770 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 771 vap->va_fileid = fxdr_hyper(&fp->fa3_fileid); 772 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 773 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 774 vap->va_flags = 0; 775 vap->va_filerev = 0; 776 } else { 777 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 778 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 779 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 780 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 781 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); 782 vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) 783 * NFS_FABLKSIZE; 784 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 785 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 786 vap->va_flags = 0; 787 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 788 fp->fa2_ctime.nfsv2_sec); 789 vap->va_ctime.tv_nsec = 0; 790 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 791 vap->va_filerev = 0; 792 } 793 np->n_attrstamp = time_uptime; 794 if (vap->va_size != np->n_size) { 795 if (vap->va_type == VREG) { 796 /* 797 * Get rid of all the junk we had before and just 798 * set NRMODIFIED if NLMODIFIED is 0. Depend on 799 * occassionally flushing our dirty buffers to 800 * clear both the NLMODIFIED and NRMODIFIED flags. 801 */ 802 if ((np->n_flag & NLMODIFIED) == 0) 803 np->n_flag |= NRMODIFIED; 804 #if 0 805 if ((lattr_flags & NFS_LATTR_NOSHRINK) && 806 vap->va_size < np->n_size) { 807 /* 808 * We've been told not to shrink the file; 809 * zero np->n_attrstamp to indicate that 810 * the attributes are stale. 811 * 812 * This occurs primarily due to recursive 813 * NFS ops that are executed during periods 814 * where we cannot safely reduce the size of 815 * the file. 816 * 817 * Additionally, write rpcs are broken down 818 * into buffers and np->n_size is 819 * pre-extended. Setting NRMODIFIED here 820 * can result in n_size getting reset to a 821 * lower value, which is NOT what we want. 822 * XXX this needs to be cleaned up a lot 823 * more. 824 */ 825 vap->va_size = np->n_size; 826 np->n_attrstamp = 0; 827 if ((np->n_flag & NLMODIFIED) == 0) 828 np->n_flag |= NRMODIFIED; 829 } else if (np->n_flag & NLMODIFIED) { 830 /* 831 * We've modified the file: Use the larger 832 * of our size, and the server's size. At 833 * this point the cache coherency is all 834 * shot to hell. To try to handle multiple 835 * clients appending to the file at the same 836 * time mark that the server has changed 837 * the file if the server's notion of the 838 * file size is larger then our notion. 839 * 840 * XXX this needs work. 841 */ 842 if (vap->va_size < np->n_size) { 843 vap->va_size = np->n_size; 844 } else { 845 np->n_size = vap->va_size; 846 np->n_flag |= NRMODIFIED; 847 } 848 } else { 849 /* 850 * Someone changed the file's size on the 851 * server and there are no local changes 852 * to get in the way, set the size and mark 853 * it. 854 */ 855 np->n_size = vap->va_size; 856 np->n_flag |= NRMODIFIED; 857 } 858 nvnode_pager_setsize(vp, np->n_size, XXX); 859 #endif 860 } else { 861 np->n_size = vap->va_size; 862 } 863 } 864 if (vaper != NULL) { 865 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 866 if (np->n_flag & NCHG) { 867 if (np->n_flag & NACC) 868 vaper->va_atime = np->n_atim; 869 if (np->n_flag & NUPD) 870 vaper->va_mtime = np->n_mtim; 871 } 872 } 873 return (0); 874 } 875 876 #ifdef NFS_ACDEBUG 877 #include <sys/sysctl.h> 878 SYSCTL_DECL(_vfs_nfs); 879 static int nfs_acdebug; 880 SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, ""); 881 #endif 882 883 /* 884 * Check the time stamp 885 * If the cache is valid, copy contents to *vap and return 0 886 * otherwise return an error 887 */ 888 int 889 nfs_getattrcache(struct vnode *vp, struct vattr *vaper) 890 { 891 struct nfsnode *np; 892 struct vattr *vap; 893 struct nfsmount *nmp; 894 int timeo; 895 896 np = VTONFS(vp); 897 vap = &np->n_vattr; 898 nmp = VFSTONFS(vp->v_mount); 899 900 /* 901 * Dynamic timeout based on how recently the file was modified. 902 * n_mtime is always valid. 903 */ 904 timeo = (get_approximate_time_t() - np->n_mtime) / 60; 905 906 #ifdef NFS_ACDEBUG 907 if (nfs_acdebug>1) 908 kprintf("nfs_getattrcache: initial timeo = %d\n", timeo); 909 #endif 910 911 if (vap->va_type == VDIR) { 912 if ((np->n_flag & NLMODIFIED) || timeo < nmp->nm_acdirmin) 913 timeo = nmp->nm_acdirmin; 914 else if (timeo > nmp->nm_acdirmax) 915 timeo = nmp->nm_acdirmax; 916 } else { 917 if ((np->n_flag & NLMODIFIED) || timeo < nmp->nm_acregmin) 918 timeo = nmp->nm_acregmin; 919 else if (timeo > nmp->nm_acregmax) 920 timeo = nmp->nm_acregmax; 921 } 922 923 #ifdef NFS_ACDEBUG 924 if (nfs_acdebug > 2) 925 kprintf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n", 926 nmp->nm_acregmin, nmp->nm_acregmax, 927 nmp->nm_acdirmin, nmp->nm_acdirmax); 928 929 if (nfs_acdebug) 930 kprintf("nfs_getattrcache: age = %d; final timeo = %d\n", 931 (int)(time_uptime - np->n_attrstamp), timeo); 932 #endif 933 934 if (np->n_attrstamp == 0 || (time_uptime - np->n_attrstamp) >= timeo) { 935 nfsstats.attrcache_misses++; 936 return (ENOENT); 937 } 938 nfsstats.attrcache_hits++; 939 940 /* 941 * Our attribute cache can be stale due to modifications made on 942 * this host. XXX this is a bad hack. We need a more deterministic 943 * means of finding out which np fields are valid verses attr cache 944 * fields. We really should update the vattr info on the fly when 945 * making local changes. 946 */ 947 if (vap->va_size != np->n_size) { 948 if (vap->va_type == VREG) { 949 if (np->n_flag & NLMODIFIED) 950 vap->va_size = np->n_size; 951 nfs_meta_setsize(vp, curthread, vap->va_size, 0); 952 } else { 953 np->n_size = vap->va_size; 954 } 955 } 956 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 957 if (np->n_flag & NCHG) { 958 if (np->n_flag & NACC) 959 vaper->va_atime = np->n_atim; 960 if (np->n_flag & NUPD) 961 vaper->va_mtime = np->n_mtim; 962 } 963 return (0); 964 } 965 966 #ifndef NFS_NOSERVER 967 968 /* 969 * Set up nameidata for a lookup() call and do it. 970 * 971 * If pubflag is set, this call is done for a lookup operation on the 972 * public filehandle. In that case we allow crossing mountpoints and 973 * absolute pathnames. However, the caller is expected to check that 974 * the lookup result is within the public fs, and deny access if 975 * it is not. 976 * 977 * dirp may be set whether an error is returned or not, and must be 978 * released by the caller. 979 * 980 * On return nd->nl_nch usually points to the target ncp, which may represent 981 * a negative hit. 982 * 983 * NOTE: the caller must call nlookup_done(nd) unconditionally on return 984 * to cleanup. 985 */ 986 int 987 nfs_namei(struct nlookupdata *nd, struct ucred *cred, int nflags, 988 struct vnode **dvpp, struct vnode **vpp, 989 fhandle_t *fhp, int len, 990 struct nfssvc_sock *slp, struct sockaddr *nam, struct mbuf **mdp, 991 caddr_t *dposp, struct vnode **dirpp, struct thread *td, 992 int kerbflag, int pubflag) 993 { 994 int i, rem; 995 struct mbuf *md; 996 char *fromcp, *tocp, *cp; 997 char *namebuf; 998 struct nchandle nch; 999 struct vnode *dp; 1000 struct mount *mp; 1001 int error, rdonly; 1002 int isretry; 1003 1004 /* 1005 * Check retry case 1006 */ 1007 if (nd->nl_flags & NLC_HASBUF) { 1008 namebuf = nd->nl_path; 1009 nd->nl_flags &= ~NLC_HASBUF; 1010 nd->nl_path = NULL; 1011 isretry = 1; 1012 } else { 1013 namebuf = objcache_get(namei_oc, M_WAITOK); 1014 isretry = 0; 1015 } 1016 *dirpp = NULL; 1017 1018 /* 1019 * Copy the name from the mbuf list to namebuf. 1020 */ 1021 if (isretry == 0) { 1022 fromcp = *dposp; 1023 tocp = namebuf; 1024 md = *mdp; 1025 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1026 1027 for (i = 0; i < len; i++) { 1028 while (rem == 0) { 1029 md = md->m_next; 1030 if (md == NULL) { 1031 error = EBADRPC; 1032 goto out; 1033 } 1034 fromcp = mtod(md, caddr_t); 1035 rem = md->m_len; 1036 } 1037 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1038 error = EACCES; 1039 goto out; 1040 } 1041 *tocp++ = *fromcp++; 1042 rem--; 1043 } 1044 *tocp = '\0'; 1045 *mdp = md; 1046 *dposp = fromcp; 1047 len = nfsm_rndup(len)-len; 1048 if (len > 0) { 1049 if (rem >= len) 1050 *dposp += len; 1051 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1052 goto out; 1053 } 1054 } 1055 1056 /* 1057 * Extract and set starting directory. The returned dp is refd 1058 * but not locked. 1059 */ 1060 error = nfsrv_fhtovp(fhp, FALSE, &mp, &dp, cred, slp, 1061 nam, &rdonly, kerbflag, pubflag); 1062 if (error) 1063 goto out; 1064 if (dp->v_type != VDIR) { 1065 vrele(dp); 1066 error = ENOTDIR; 1067 goto out; 1068 } 1069 1070 /* 1071 * Set return directory. Reference to dp is implicitly transfered 1072 * to the returned pointer. This must be set before we potentially 1073 * goto out below. 1074 */ 1075 *dirpp = dp; 1076 1077 /* 1078 * read-only - NLC_DELETE, NLC_RENAME_DST are disallowed. NLC_CREATE 1079 * is passed through to nlookup() and will be disallowed 1080 * if the file does not already exist. 1081 */ 1082 if (rdonly) { 1083 nflags |= NLC_NFS_RDONLY; 1084 if (nflags & (NLC_DELETE | NLC_RENAME_DST)) { 1085 error = EROFS; 1086 goto out; 1087 } 1088 } 1089 1090 /* 1091 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1092 * and the 'native path' indicator. 1093 */ 1094 if (pubflag) { 1095 cp = objcache_get(namei_oc, M_WAITOK); 1096 fromcp = namebuf; 1097 tocp = cp; 1098 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1099 switch ((unsigned char)*fromcp) { 1100 case WEBNFS_NATIVE_CHAR: 1101 /* 1102 * 'Native' path for us is the same 1103 * as a path according to the NFS spec, 1104 * just skip the escape char. 1105 */ 1106 fromcp++; 1107 break; 1108 /* 1109 * More may be added in the future, range 0x80-0xff 1110 */ 1111 default: 1112 error = EIO; 1113 objcache_put(namei_oc, cp); 1114 goto out; 1115 } 1116 } 1117 /* 1118 * Translate the '%' escapes, URL-style. 1119 */ 1120 while (*fromcp != '\0') { 1121 if (*fromcp == WEBNFS_ESC_CHAR) { 1122 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1123 fromcp++; 1124 *tocp++ = HEXSTRTOI(fromcp); 1125 fromcp += 2; 1126 continue; 1127 } else { 1128 error = ENOENT; 1129 objcache_put(namei_oc, cp); 1130 goto out; 1131 } 1132 } else 1133 *tocp++ = *fromcp++; 1134 } 1135 *tocp = '\0'; 1136 objcache_put(namei_oc, namebuf); 1137 namebuf = cp; 1138 } 1139 1140 /* 1141 * Setup for search. We need to get a start directory from dp. Note 1142 * that dp is ref'd, but we no longer 'own' the ref (*dirpp owns it). 1143 */ 1144 if (pubflag == 0) { 1145 nflags |= NLC_NFS_NOSOFTLINKTRAV; 1146 nflags |= NLC_NOCROSSMOUNT; 1147 } 1148 1149 /* 1150 * We need a starting ncp from the directory vnode dp. dp must not 1151 * be locked. The returned ncp will be refd but not locked. 1152 * 1153 * If no suitable ncp is found we instruct cache_fromdvp() to create 1154 * one. If this fails the directory has probably been removed while 1155 * the target was chdir'd into it and any further lookup will fail. 1156 */ 1157 if ((error = cache_fromdvp(dp, cred, 1, &nch)) != 0) 1158 goto out; 1159 nlookup_init_raw(nd, namebuf, UIO_SYSSPACE, nflags, cred, &nch); 1160 cache_drop(&nch); 1161 1162 /* 1163 * Ok, do the lookup. 1164 */ 1165 error = nlookup(nd); 1166 1167 /* 1168 * If no error occured return the requested dvpp and vpp. If 1169 * NLC_CREATE was specified nd->nl_nch may represent a negative 1170 * cache hit in which case we do not attempt to obtain the vp. 1171 */ 1172 if (error == 0) { 1173 if (dvpp) { 1174 if (nd->nl_nch.ncp->nc_parent) { 1175 nch = nd->nl_nch; 1176 nch.ncp = nch.ncp->nc_parent; 1177 cache_hold(&nch); 1178 cache_lock(&nch); 1179 error = cache_vget(&nch, nd->nl_cred, 1180 LK_EXCLUSIVE, dvpp); 1181 cache_put(&nch); 1182 } else { 1183 error = ENXIO; 1184 } 1185 } 1186 if (vpp && nd->nl_nch.ncp->nc_vp) { 1187 error = cache_vget(&nd->nl_nch, nd->nl_cred, LK_EXCLUSIVE, vpp); 1188 } 1189 if (error) { 1190 if (dvpp && *dvpp) { 1191 vput(*dvpp); 1192 *dvpp = NULL; 1193 } 1194 if (vpp && *vpp) { 1195 vput(*vpp); 1196 *vpp = NULL; 1197 } 1198 } 1199 } 1200 1201 /* 1202 * Finish up. 1203 */ 1204 out: 1205 objcache_put(namei_oc, namebuf); 1206 return (error); 1207 } 1208 1209 /* 1210 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1211 * - look up fsid in mount list (if not found ret error) 1212 * - get vp and export rights by calling VFS_FHTOVP() 1213 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1214 * - if not lockflag unlock it with vn_unlock() 1215 */ 1216 int 1217 nfsrv_fhtovp(fhandle_t *fhp, int lockflag, 1218 struct mount **mpp, struct vnode **vpp, 1219 struct ucred *cred, struct nfssvc_sock *slp, struct sockaddr *nam, 1220 int *rdonlyp, int kerbflag, int pubflag) 1221 { 1222 struct mount *mp; 1223 int i; 1224 struct ucred *credanon; 1225 int error, exflags; 1226 #ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */ 1227 struct sockaddr_int *saddr; 1228 #endif 1229 1230 *vpp = NULL; 1231 *mpp = NULL; 1232 1233 if (nfs_ispublicfh(fhp)) { 1234 if (!pubflag || !nfs_pub.np_valid) 1235 return (ESTALE); 1236 fhp = &nfs_pub.np_handle; 1237 } 1238 1239 mp = *mpp = vfs_getvfs(&fhp->fh_fsid); 1240 if (mp == NULL) 1241 return (ESTALE); 1242 error = VFS_CHECKEXP(mp, nam, &exflags, &credanon); 1243 if (error) { 1244 mount_drop(mp); 1245 return (error); 1246 } 1247 error = VFS_FHTOVP(mp, NULL, &fhp->fh_fid, vpp); 1248 mount_drop(mp); 1249 if (error) 1250 return (ESTALE); 1251 #ifdef MNT_EXNORESPORT 1252 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 1253 saddr = (struct sockaddr_in *)nam; 1254 if (saddr->sin_family == AF_INET && 1255 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 1256 vput(*vpp); 1257 *vpp = NULL; 1258 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1259 } 1260 } 1261 #endif 1262 /* 1263 * Check/setup credentials. 1264 */ 1265 if (exflags & MNT_EXKERB) { 1266 if (!kerbflag) { 1267 vput(*vpp); 1268 *vpp = NULL; 1269 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1270 } 1271 } else if (kerbflag) { 1272 vput(*vpp); 1273 *vpp = NULL; 1274 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1275 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1276 cred->cr_uid = credanon->cr_uid; 1277 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1278 cred->cr_groups[i] = credanon->cr_groups[i]; 1279 cred->cr_ngroups = i; 1280 } 1281 if (exflags & MNT_EXRDONLY) 1282 *rdonlyp = 1; 1283 else 1284 *rdonlyp = 0; 1285 1286 if (!lockflag) 1287 vn_unlock(*vpp); 1288 return (0); 1289 } 1290 1291 /* 1292 * WebNFS: check if a filehandle is a public filehandle. For v3, this 1293 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 1294 * transformed this to all zeroes in both cases, so check for it. 1295 */ 1296 int 1297 nfs_ispublicfh(fhandle_t *fhp) 1298 { 1299 char *cp = (char *)fhp; 1300 int i; 1301 1302 for (i = 0; i < NFSX_V3FH; i++) 1303 if (*cp++ != 0) 1304 return (FALSE); 1305 return (TRUE); 1306 } 1307 1308 #endif /* NFS_NOSERVER */ 1309 /* 1310 * This function compares two net addresses by family and returns TRUE 1311 * if they are the same host. 1312 * If there is any doubt, return FALSE. 1313 * The AF_INET family is handled as a special case so that address mbufs 1314 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1315 */ 1316 int 1317 netaddr_match(int family, union nethostaddr *haddr, struct sockaddr *nam) 1318 { 1319 struct sockaddr_in *inetaddr; 1320 1321 switch (family) { 1322 case AF_INET: 1323 inetaddr = (struct sockaddr_in *)nam; 1324 if (inetaddr->sin_family == AF_INET && 1325 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1326 return (1); 1327 break; 1328 default: 1329 break; 1330 } 1331 return (0); 1332 } 1333 1334 static nfsuint64 nfs_nullcookie = { { 0, 0 } }; 1335 /* 1336 * This function finds the directory cookie that corresponds to the 1337 * logical byte offset given. 1338 */ 1339 nfsuint64 * 1340 nfs_getcookie(struct nfsnode *np, off_t off, int add) 1341 { 1342 struct nfsdmap *dp, *dp2; 1343 int pos; 1344 1345 pos = (uoff_t)off / NFS_DIRBLKSIZ; 1346 if (pos == 0 || off < 0) { 1347 #ifdef DIAGNOSTIC 1348 if (add) 1349 panic("nfs getcookie add at <= 0"); 1350 #endif 1351 return (&nfs_nullcookie); 1352 } 1353 pos--; 1354 dp = np->n_cookies.lh_first; 1355 if (!dp) { 1356 if (add) { 1357 dp = kmalloc(sizeof(struct nfsdmap), M_NFSDIROFF, 1358 M_WAITOK); 1359 dp->ndm_eocookie = 0; 1360 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 1361 } else 1362 return (NULL); 1363 } 1364 while (pos >= NFSNUMCOOKIES) { 1365 pos -= NFSNUMCOOKIES; 1366 if (dp->ndm_list.le_next) { 1367 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 1368 pos >= dp->ndm_eocookie) 1369 return (NULL); 1370 dp = dp->ndm_list.le_next; 1371 } else if (add) { 1372 dp2 = kmalloc(sizeof(struct nfsdmap), M_NFSDIROFF, 1373 M_WAITOK); 1374 dp2->ndm_eocookie = 0; 1375 LIST_INSERT_AFTER(dp, dp2, ndm_list); 1376 dp = dp2; 1377 } else 1378 return (NULL); 1379 } 1380 if (pos >= dp->ndm_eocookie) { 1381 if (add) 1382 dp->ndm_eocookie = pos + 1; 1383 else 1384 return (NULL); 1385 } 1386 return (&dp->ndm_cookies[pos]); 1387 } 1388 1389 /* 1390 * Invalidate cached directory information, except for the actual directory 1391 * blocks (which are invalidated separately). 1392 * Done mainly to avoid the use of stale offset cookies. 1393 */ 1394 void 1395 nfs_invaldir(struct vnode *vp) 1396 { 1397 struct nfsnode *np = VTONFS(vp); 1398 1399 #ifdef DIAGNOSTIC 1400 if (vp->v_type != VDIR) 1401 panic("nfs: invaldir not dir"); 1402 #endif 1403 np->n_direofoffset = 0; 1404 np->n_cookieverf.nfsuquad[0] = 0; 1405 np->n_cookieverf.nfsuquad[1] = 0; 1406 if (np->n_cookies.lh_first) 1407 np->n_cookies.lh_first->ndm_eocookie = 0; 1408 } 1409 1410 /* 1411 * Set the v_type field for an NFS client's vnode and initialize for 1412 * buffer cache operations if necessary. 1413 */ 1414 void 1415 nfs_setvtype(struct vnode *vp, enum vtype vtyp) 1416 { 1417 vp->v_type = vtyp; 1418 1419 switch(vtyp) { 1420 case VREG: 1421 case VDIR: 1422 case VLNK: 1423 /* 1424 * Needs VMIO, size not yet known, and blocksize 1425 * is not really relevant if we are passing a 1426 * filesize of 0. 1427 */ 1428 vinitvmio(vp, 0, PAGE_SIZE, -1); 1429 break; 1430 default: 1431 break; 1432 } 1433 } 1434 1435 /* 1436 * The write verifier has changed (probably due to a server reboot), so all 1437 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 1438 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 1439 * and B_CLUSTEROK flags. Once done the new write verifier can be set for the 1440 * mount point. 1441 * 1442 * B_CLUSTEROK must be cleared along with B_NEEDCOMMIT because stage 1 data 1443 * writes are not clusterable. 1444 */ 1445 1446 static int nfs_clearcommit_bp(struct buf *bp, void *data __unused); 1447 static int nfs_clearcommit_callback(struct mount *mp, struct vnode *vp, 1448 void *data __unused); 1449 1450 void 1451 nfs_clearcommit(struct mount *mp) 1452 { 1453 vsyncscan(mp, VMSC_NOWAIT, nfs_clearcommit_callback, NULL); 1454 } 1455 1456 static int 1457 nfs_clearcommit_callback(struct mount *mp, struct vnode *vp, 1458 void *data __unused) 1459 { 1460 lwkt_gettoken(&vp->v_token); 1461 RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL, 1462 nfs_clearcommit_bp, NULL); 1463 lwkt_reltoken(&vp->v_token); 1464 1465 return(0); 1466 } 1467 1468 static int 1469 nfs_clearcommit_bp(struct buf *bp, void *data __unused) 1470 { 1471 if (BUF_LOCKINUSE(bp) == 0 && 1472 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) 1473 == (B_DELWRI | B_NEEDCOMMIT)) { 1474 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 1475 } 1476 return(0); 1477 } 1478 1479 #ifndef NFS_NOSERVER 1480 /* 1481 * Map errnos to NFS error numbers. For Version 3 also filter out error 1482 * numbers not specified for the associated procedure. 1483 */ 1484 int 1485 nfsrv_errmap(struct nfsrv_descript *nd, int err) 1486 { 1487 short *defaulterrp, *errp; 1488 1489 if (nd->nd_flag & ND_NFSV3) { 1490 if (nd->nd_procnum <= NFSPROC_COMMIT) { 1491 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 1492 while (*++errp) { 1493 if (*errp == err) 1494 return (err); 1495 else if (*errp > err) 1496 break; 1497 } 1498 return ((int)*defaulterrp); 1499 } else 1500 return (err & 0xffff); 1501 } 1502 if (err <= ELAST) 1503 return ((int)nfsrv_v2errmap[err - 1]); 1504 return (NFSERR_IO); 1505 } 1506 1507 /* 1508 * Sort the group list in increasing numerical order. 1509 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 1510 * that used to be here.) 1511 */ 1512 void 1513 nfsrvw_sort(gid_t *list, int num) 1514 { 1515 int i, j; 1516 gid_t v; 1517 1518 /* Insertion sort. */ 1519 for (i = 1; i < num; i++) { 1520 v = list[i]; 1521 /* find correct slot for value v, moving others up */ 1522 for (j = i; --j >= 0 && v < list[j];) 1523 list[j + 1] = list[j]; 1524 list[j + 1] = v; 1525 } 1526 } 1527 1528 /* 1529 * copy credentials making sure that the result can be compared with bcmp(). 1530 */ 1531 void 1532 nfsrv_setcred(struct ucred *incred, struct ucred *outcred) 1533 { 1534 int i; 1535 1536 bzero((caddr_t)outcred, sizeof (struct ucred)); 1537 outcred->cr_ref = 1; 1538 outcred->cr_uid = incred->cr_uid; 1539 outcred->cr_ngroups = incred->cr_ngroups; 1540 for (i = 0; i < incred->cr_ngroups; i++) 1541 outcred->cr_groups[i] = incred->cr_groups[i]; 1542 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 1543 } 1544 #endif /* NFS_NOSERVER */ 1545 1546 /* 1547 * Hold a ucred in nfs_node. Discard prison information, otherwise 1548 * prisons might stick around indefinitely due to NFS node caching. 1549 */ 1550 struct ucred * 1551 nfs_crhold(struct ucred *cred) 1552 { 1553 if (cred) { 1554 if (cred->cr_prison) { 1555 cred = crdup(cred); 1556 prison_free(cred->cr_prison); 1557 cred->cr_prison = NULL; 1558 } else { 1559 cred = crhold(cred); 1560 } 1561 } 1562 return cred; 1563 } 1564 1565 /* 1566 * Return whether two ucreds are the same insofar as NFS cares about. 1567 */ 1568 int 1569 nfs_crsame(struct ucred *cr1, struct ucred *cr2) 1570 { 1571 if (cr1 != cr2) { 1572 if (cr1 == NULL || cr2 == NULL) 1573 return (cr1 == cr2); 1574 if (cr1->cr_uid != cr2->cr_uid || 1575 cr1->cr_ruid != cr2->cr_ruid || 1576 cr1->cr_rgid != cr2->cr_rgid || 1577 cr1->cr_ngroups != cr2->cr_ngroups) { 1578 return 0; 1579 } 1580 if (bcmp(cr1->cr_groups, cr2->cr_groups, 1581 cr1->cr_ngroups * sizeof(cr1->cr_groups[0])) != 0) { 1582 return 0; 1583 } 1584 } 1585 return 1; 1586 } 1587