| 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: src/sys/nfs/nfs_subs.c,v 1.90.2.2 2001/10/25 19:18:53 dillon Exp $ |
| 38 | * $DragonFly: src/sys/vfs/nfs/nfs_subs.c,v 1.13 2004/04/07 05:15:48 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/namei.h> |
| 54 | #include <sys/mbuf.h> |
| 55 | #include <sys/socket.h> |
| 56 | #include <sys/stat.h> |
| 57 | #include <sys/malloc.h> |
| 58 | #include <sys/sysent.h> |
| 59 | #include <sys/syscall.h> |
| 60 | #include <sys/conf.h> |
| 61 | |
| 62 | #include <vm/vm.h> |
| 63 | #include <vm/vm_object.h> |
| 64 | #include <vm/vm_extern.h> |
| 65 | #include <vm/vm_zone.h> |
| 66 | |
| 67 | #include <sys/buf2.h> |
| 68 | |
| 69 | #include "rpcv2.h" |
| 70 | #include "nfsproto.h" |
| 71 | #include "nfs.h" |
| 72 | #include "nfsmount.h" |
| 73 | #include "nfsnode.h" |
| 74 | #include "xdr_subs.h" |
| 75 | #include "nfsm_subs.h" |
| 76 | #include "nqnfs.h" |
| 77 | #include "nfsrtt.h" |
| 78 | |
| 79 | #include <netinet/in.h> |
| 80 | |
| 81 | /* |
| 82 | * Data items converted to xdr at startup, since they are constant |
| 83 | * This is kinda hokey, but may save a little time doing byte swaps |
| 84 | */ |
| 85 | u_int32_t nfs_xdrneg1; |
| 86 | u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, |
| 87 | rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, |
| 88 | rpc_auth_kerb; |
| 89 | u_int32_t nfs_prog, nqnfs_prog, nfs_true, nfs_false; |
| 90 | |
| 91 | /* And other global data */ |
| 92 | static u_int32_t nfs_xid = 0; |
| 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 | int nfs_pbuf_freecnt = -1; /* start out unlimited */ |
| 102 | |
| 103 | struct nfs_reqq nfs_reqq; |
| 104 | struct nfssvc_sockhead nfssvc_sockhead; |
| 105 | int nfssvc_sockhead_flag; |
| 106 | struct nfsd_head nfsd_head; |
| 107 | int nfsd_head_flag; |
| 108 | struct nfs_bufq nfs_bufq; |
| 109 | struct nqtimerhead nqtimerhead; |
| 110 | struct nqfhhashhead *nqfhhashtbl; |
| 111 | u_long nqfhhash; |
| 112 | |
| 113 | static void (*nfs_prev_lease_updatetime) (int); |
| 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 | static vop_t *nfs_prev_vop_lease_check; |
| 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 | extern struct nfsrtt nfsrtt; |
| 548 | extern time_t nqnfsstarttime; |
| 549 | extern int nqsrv_clockskew; |
| 550 | extern int nqsrv_writeslack; |
| 551 | extern int nqsrv_maxlease; |
| 552 | extern struct nfsstats nfsstats; |
| 553 | extern int nqnfs_piggy[NFS_NPROCS]; |
| 554 | extern nfstype nfsv2_type[9]; |
| 555 | extern nfstype nfsv3_type[9]; |
| 556 | extern struct nfsnodehashhead *nfsnodehashtbl; |
| 557 | extern u_long nfsnodehash; |
| 558 | |
| 559 | struct nfssvc_args; |
| 560 | extern int nfssvc(struct proc *, struct nfssvc_args *, int *); |
| 561 | |
| 562 | LIST_HEAD(nfsnodehashhead, nfsnode); |
| 563 | |
| 564 | int nfs_webnamei (struct nameidata *, struct vnode *, struct proc *); |
| 565 | |
| 566 | u_quad_t |
| 567 | nfs_curusec() |
| 568 | { |
| 569 | struct timeval tv; |
| 570 | |
| 571 | getmicrotime(&tv); |
| 572 | return ((u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec); |
| 573 | } |
| 574 | |
| 575 | /* |
| 576 | * Create the header for an rpc request packet |
| 577 | * The hsiz is the size of the rest of the nfs request header. |
| 578 | * (just used to decide if a cluster is a good idea) |
| 579 | */ |
| 580 | struct mbuf * |
| 581 | nfsm_reqh(vp, procid, hsiz, bposp) |
| 582 | struct vnode *vp; |
| 583 | u_long procid; |
| 584 | int hsiz; |
| 585 | caddr_t *bposp; |
| 586 | { |
| 587 | struct mbuf *mb; |
| 588 | u_int32_t *tl; |
| 589 | caddr_t bpos; |
| 590 | struct mbuf *mb2; |
| 591 | struct nfsmount *nmp; |
| 592 | int nqflag; |
| 593 | |
| 594 | MGET(mb, M_WAIT, MT_DATA); |
| 595 | if (hsiz >= MINCLSIZE) |
| 596 | MCLGET(mb, M_WAIT); |
| 597 | mb->m_len = 0; |
| 598 | bpos = mtod(mb, caddr_t); |
| 599 | |
| 600 | /* |
| 601 | * For NQNFS, add lease request. |
| 602 | */ |
| 603 | if (vp) { |
| 604 | nmp = VFSTONFS(vp->v_mount); |
| 605 | if (nmp->nm_flag & NFSMNT_NQNFS) { |
| 606 | nqflag = NQNFS_NEEDLEASE(vp, procid); |
| 607 | if (nqflag) { |
| 608 | nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED); |
| 609 | *tl++ = txdr_unsigned(nqflag); |
| 610 | *tl = txdr_unsigned(nmp->nm_leaseterm); |
| 611 | } else { |
| 612 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); |
| 613 | *tl = 0; |
| 614 | } |
| 615 | } |
| 616 | } |
| 617 | /* Finally, return values */ |
| 618 | *bposp = bpos; |
| 619 | return (mb); |
| 620 | } |
| 621 | |
| 622 | /* |
| 623 | * Build the RPC header and fill in the authorization info. |
| 624 | * The authorization string argument is only used when the credentials |
| 625 | * come from outside of the kernel. |
| 626 | * Returns the head of the mbuf list. |
| 627 | */ |
| 628 | struct mbuf * |
| 629 | nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, |
| 630 | verf_str, mrest, mrest_len, mbp, xidp) |
| 631 | struct ucred *cr; |
| 632 | int nmflag; |
| 633 | int procid; |
| 634 | int auth_type; |
| 635 | int auth_len; |
| 636 | char *auth_str; |
| 637 | int verf_len; |
| 638 | char *verf_str; |
| 639 | struct mbuf *mrest; |
| 640 | int mrest_len; |
| 641 | struct mbuf **mbp; |
| 642 | u_int32_t *xidp; |
| 643 | { |
| 644 | struct mbuf *mb; |
| 645 | u_int32_t *tl; |
| 646 | caddr_t bpos; |
| 647 | int i; |
| 648 | struct mbuf *mreq, *mb2; |
| 649 | int siz, grpsiz, authsiz; |
| 650 | |
| 651 | authsiz = nfsm_rndup(auth_len); |
| 652 | MGETHDR(mb, M_WAIT, MT_DATA); |
| 653 | if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { |
| 654 | MCLGET(mb, M_WAIT); |
| 655 | } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { |
| 656 | MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); |
| 657 | } else { |
| 658 | MH_ALIGN(mb, 8 * NFSX_UNSIGNED); |
| 659 | } |
| 660 | mb->m_len = 0; |
| 661 | mreq = mb; |
| 662 | bpos = mtod(mb, caddr_t); |
| 663 | |
| 664 | /* |
| 665 | * First the RPC header. |
| 666 | */ |
| 667 | nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); |
| 668 | |
| 669 | /* Get a pretty random xid to start with */ |
| 670 | if (!nfs_xid) |
| 671 | nfs_xid = random(); |
| 672 | /* |
| 673 | * Skip zero xid if it should ever happen. |
| 674 | */ |
| 675 | if (++nfs_xid == 0) |
| 676 | nfs_xid++; |
| 677 | |
| 678 | *tl++ = *xidp = txdr_unsigned(nfs_xid); |
| 679 | *tl++ = rpc_call; |
| 680 | *tl++ = rpc_vers; |
| 681 | if (nmflag & NFSMNT_NQNFS) { |
| 682 | *tl++ = txdr_unsigned(NQNFS_PROG); |
| 683 | *tl++ = txdr_unsigned(NQNFS_VER3); |
| 684 | } else { |
| 685 | *tl++ = txdr_unsigned(NFS_PROG); |
| 686 | if (nmflag & NFSMNT_NFSV3) |
| 687 | *tl++ = txdr_unsigned(NFS_VER3); |
| 688 | else |
| 689 | *tl++ = txdr_unsigned(NFS_VER2); |
| 690 | } |
| 691 | if (nmflag & NFSMNT_NFSV3) |
| 692 | *tl++ = txdr_unsigned(procid); |
| 693 | else |
| 694 | *tl++ = txdr_unsigned(nfsv2_procid[procid]); |
| 695 | |
| 696 | /* |
| 697 | * And then the authorization cred. |
| 698 | */ |
| 699 | *tl++ = txdr_unsigned(auth_type); |
| 700 | *tl = txdr_unsigned(authsiz); |
| 701 | switch (auth_type) { |
| 702 | case RPCAUTH_UNIX: |
| 703 | nfsm_build(tl, u_int32_t *, auth_len); |
| 704 | *tl++ = 0; /* stamp ?? */ |
| 705 | *tl++ = 0; /* NULL hostname */ |
| 706 | *tl++ = txdr_unsigned(cr->cr_uid); |
| 707 | *tl++ = txdr_unsigned(cr->cr_groups[0]); |
| 708 | grpsiz = (auth_len >> 2) - 5; |
| 709 | *tl++ = txdr_unsigned(grpsiz); |
| 710 | for (i = 1; i <= grpsiz; i++) |
| 711 | *tl++ = txdr_unsigned(cr->cr_groups[i]); |
| 712 | break; |
| 713 | case RPCAUTH_KERB4: |
| 714 | siz = auth_len; |
| 715 | while (siz > 0) { |
| 716 | if (M_TRAILINGSPACE(mb) == 0) { |
| 717 | MGET(mb2, M_WAIT, MT_DATA); |
| 718 | if (siz >= MINCLSIZE) |
| 719 | MCLGET(mb2, M_WAIT); |
| 720 | mb->m_next = mb2; |
| 721 | mb = mb2; |
| 722 | mb->m_len = 0; |
| 723 | bpos = mtod(mb, caddr_t); |
| 724 | } |
| 725 | i = min(siz, M_TRAILINGSPACE(mb)); |
| 726 | bcopy(auth_str, bpos, i); |
| 727 | mb->m_len += i; |
| 728 | auth_str += i; |
| 729 | bpos += i; |
| 730 | siz -= i; |
| 731 | } |
| 732 | if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { |
| 733 | for (i = 0; i < siz; i++) |
| 734 | *bpos++ = '\0'; |
| 735 | mb->m_len += siz; |
| 736 | } |
| 737 | break; |
| 738 | }; |
| 739 | |
| 740 | /* |
| 741 | * And the verifier... |
| 742 | */ |
| 743 | nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); |
| 744 | if (verf_str) { |
| 745 | *tl++ = txdr_unsigned(RPCAUTH_KERB4); |
| 746 | *tl = txdr_unsigned(verf_len); |
| 747 | siz = verf_len; |
| 748 | while (siz > 0) { |
| 749 | if (M_TRAILINGSPACE(mb) == 0) { |
| 750 | MGET(mb2, M_WAIT, MT_DATA); |
| 751 | if (siz >= MINCLSIZE) |
| 752 | MCLGET(mb2, M_WAIT); |
| 753 | mb->m_next = mb2; |
| 754 | mb = mb2; |
| 755 | mb->m_len = 0; |
| 756 | bpos = mtod(mb, caddr_t); |
| 757 | } |
| 758 | i = min(siz, M_TRAILINGSPACE(mb)); |
| 759 | bcopy(verf_str, bpos, i); |
| 760 | mb->m_len += i; |
| 761 | verf_str += i; |
| 762 | bpos += i; |
| 763 | siz -= i; |
| 764 | } |
| 765 | if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { |
| 766 | for (i = 0; i < siz; i++) |
| 767 | *bpos++ = '\0'; |
| 768 | mb->m_len += siz; |
| 769 | } |
| 770 | } else { |
| 771 | *tl++ = txdr_unsigned(RPCAUTH_NULL); |
| 772 | *tl = 0; |
| 773 | } |
| 774 | mb->m_next = mrest; |
| 775 | mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; |
| 776 | mreq->m_pkthdr.rcvif = (struct ifnet *)0; |
| 777 | *mbp = mb; |
| 778 | return (mreq); |
| 779 | } |
| 780 | |
| 781 | /* |
| 782 | * copies mbuf chain to the uio scatter/gather list |
| 783 | */ |
| 784 | int |
| 785 | nfsm_mbuftouio(mrep, uiop, siz, dpos) |
| 786 | struct mbuf **mrep; |
| 787 | struct uio *uiop; |
| 788 | int siz; |
| 789 | caddr_t *dpos; |
| 790 | { |
| 791 | char *mbufcp, *uiocp; |
| 792 | int xfer, left, len; |
| 793 | struct mbuf *mp; |
| 794 | long uiosiz, rem; |
| 795 | int error = 0; |
| 796 | |
| 797 | mp = *mrep; |
| 798 | mbufcp = *dpos; |
| 799 | len = mtod(mp, caddr_t)+mp->m_len-mbufcp; |
| 800 | rem = nfsm_rndup(siz)-siz; |
| 801 | while (siz > 0) { |
| 802 | if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) |
| 803 | return (EFBIG); |
| 804 | left = uiop->uio_iov->iov_len; |
| 805 | uiocp = uiop->uio_iov->iov_base; |
| 806 | if (left > siz) |
| 807 | left = siz; |
| 808 | uiosiz = left; |
| 809 | while (left > 0) { |
| 810 | while (len == 0) { |
| 811 | mp = mp->m_next; |
| 812 | if (mp == NULL) |
| 813 | return (EBADRPC); |
| 814 | mbufcp = mtod(mp, caddr_t); |
| 815 | len = mp->m_len; |
| 816 | } |
| 817 | xfer = (left > len) ? len : left; |
| 818 | #ifdef notdef |
| 819 | /* Not Yet.. */ |
| 820 | if (uiop->uio_iov->iov_op != NULL) |
| 821 | (*(uiop->uio_iov->iov_op)) |
| 822 | (mbufcp, uiocp, xfer); |
| 823 | else |
| 824 | #endif |
| 825 | if (uiop->uio_segflg == UIO_SYSSPACE) |
| 826 | bcopy(mbufcp, uiocp, xfer); |
| 827 | else |
| 828 | copyout(mbufcp, uiocp, xfer); |
| 829 | left -= xfer; |
| 830 | len -= xfer; |
| 831 | mbufcp += xfer; |
| 832 | uiocp += xfer; |
| 833 | uiop->uio_offset += xfer; |
| 834 | uiop->uio_resid -= xfer; |
| 835 | } |
| 836 | if (uiop->uio_iov->iov_len <= siz) { |
| 837 | uiop->uio_iovcnt--; |
| 838 | uiop->uio_iov++; |
| 839 | } else { |
| 840 | uiop->uio_iov->iov_base += uiosiz; |
| 841 | uiop->uio_iov->iov_len -= uiosiz; |
| 842 | } |
| 843 | siz -= uiosiz; |
| 844 | } |
| 845 | *dpos = mbufcp; |
| 846 | *mrep = mp; |
| 847 | if (rem > 0) { |
| 848 | if (len < rem) |
| 849 | error = nfs_adv(mrep, dpos, rem, len); |
| 850 | else |
| 851 | *dpos += rem; |
| 852 | } |
| 853 | return (error); |
| 854 | } |
| 855 | |
| 856 | /* |
| 857 | * copies a uio scatter/gather list to an mbuf chain. |
| 858 | * NOTE: can ony handle iovcnt == 1 |
| 859 | */ |
| 860 | int |
| 861 | nfsm_uiotombuf(uiop, mq, siz, bpos) |
| 862 | struct uio *uiop; |
| 863 | struct mbuf **mq; |
| 864 | int siz; |
| 865 | caddr_t *bpos; |
| 866 | { |
| 867 | char *uiocp; |
| 868 | struct mbuf *mp, *mp2; |
| 869 | int xfer, left, mlen; |
| 870 | int uiosiz, clflg, rem; |
| 871 | char *cp; |
| 872 | |
| 873 | #ifdef DIAGNOSTIC |
| 874 | if (uiop->uio_iovcnt != 1) |
| 875 | panic("nfsm_uiotombuf: iovcnt != 1"); |
| 876 | #endif |
| 877 | |
| 878 | if (siz > MLEN) /* or should it >= MCLBYTES ?? */ |
| 879 | clflg = 1; |
| 880 | else |
| 881 | clflg = 0; |
| 882 | rem = nfsm_rndup(siz)-siz; |
| 883 | mp = mp2 = *mq; |
| 884 | while (siz > 0) { |
| 885 | left = uiop->uio_iov->iov_len; |
| 886 | uiocp = uiop->uio_iov->iov_base; |
| 887 | if (left > siz) |
| 888 | left = siz; |
| 889 | uiosiz = left; |
| 890 | while (left > 0) { |
| 891 | mlen = M_TRAILINGSPACE(mp); |
| 892 | if (mlen == 0) { |
| 893 | MGET(mp, M_WAIT, MT_DATA); |
| 894 | if (clflg) |
| 895 | MCLGET(mp, M_WAIT); |
| 896 | mp->m_len = 0; |
| 897 | mp2->m_next = mp; |
| 898 | mp2 = mp; |
| 899 | mlen = M_TRAILINGSPACE(mp); |
| 900 | } |
| 901 | xfer = (left > mlen) ? mlen : left; |
| 902 | #ifdef notdef |
| 903 | /* Not Yet.. */ |
| 904 | if (uiop->uio_iov->iov_op != NULL) |
| 905 | (*(uiop->uio_iov->iov_op)) |
| 906 | (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); |
| 907 | else |
| 908 | #endif |
| 909 | if (uiop->uio_segflg == UIO_SYSSPACE) |
| 910 | bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); |
| 911 | else |
| 912 | copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); |
| 913 | mp->m_len += xfer; |
| 914 | left -= xfer; |
| 915 | uiocp += xfer; |
| 916 | uiop->uio_offset += xfer; |
| 917 | uiop->uio_resid -= xfer; |
| 918 | } |
| 919 | uiop->uio_iov->iov_base += uiosiz; |
| 920 | uiop->uio_iov->iov_len -= uiosiz; |
| 921 | siz -= uiosiz; |
| 922 | } |
| 923 | if (rem > 0) { |
| 924 | if (rem > M_TRAILINGSPACE(mp)) { |
| 925 | MGET(mp, M_WAIT, MT_DATA); |
| 926 | mp->m_len = 0; |
| 927 | mp2->m_next = mp; |
| 928 | } |
| 929 | cp = mtod(mp, caddr_t)+mp->m_len; |
| 930 | for (left = 0; left < rem; left++) |
| 931 | *cp++ = '\0'; |
| 932 | mp->m_len += rem; |
| 933 | *bpos = cp; |
| 934 | } else |
| 935 | *bpos = mtod(mp, caddr_t)+mp->m_len; |
| 936 | *mq = mp; |
| 937 | return (0); |
| 938 | } |
| 939 | |
| 940 | /* |
| 941 | * Help break down an mbuf chain by setting the first siz bytes contiguous |
| 942 | * pointed to by returned val. |
| 943 | * This is used by the macros nfsm_dissect and nfsm_dissecton for tough |
| 944 | * cases. (The macros use the vars. dpos and dpos2) |
| 945 | */ |
| 946 | int |
| 947 | nfsm_disct(mdp, dposp, siz, left, cp2) |
| 948 | struct mbuf **mdp; |
| 949 | caddr_t *dposp; |
| 950 | int siz; |
| 951 | int left; |
| 952 | caddr_t *cp2; |
| 953 | { |
| 954 | struct mbuf *mp, *mp2; |
| 955 | int siz2, xfer; |
| 956 | caddr_t p; |
| 957 | |
| 958 | mp = *mdp; |
| 959 | while (left == 0) { |
| 960 | *mdp = mp = mp->m_next; |
| 961 | if (mp == NULL) |
| 962 | return (EBADRPC); |
| 963 | left = mp->m_len; |
| 964 | *dposp = mtod(mp, caddr_t); |
| 965 | } |
| 966 | if (left >= siz) { |
| 967 | *cp2 = *dposp; |
| 968 | *dposp += siz; |
| 969 | } else if (mp->m_next == NULL) { |
| 970 | return (EBADRPC); |
| 971 | } else if (siz > MHLEN) { |
| 972 | panic("nfs S too big"); |
| 973 | } else { |
| 974 | MGET(mp2, M_WAIT, MT_DATA); |
| 975 | mp2->m_next = mp->m_next; |
| 976 | mp->m_next = mp2; |
| 977 | mp->m_len -= left; |
| 978 | mp = mp2; |
| 979 | *cp2 = p = mtod(mp, caddr_t); |
| 980 | bcopy(*dposp, p, left); /* Copy what was left */ |
| 981 | siz2 = siz-left; |
| 982 | p += left; |
| 983 | mp2 = mp->m_next; |
| 984 | /* Loop around copying up the siz2 bytes */ |
| 985 | while (siz2 > 0) { |
| 986 | if (mp2 == NULL) |
| 987 | return (EBADRPC); |
| 988 | xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; |
| 989 | if (xfer > 0) { |
| 990 | bcopy(mtod(mp2, caddr_t), p, xfer); |
| 991 | NFSMADV(mp2, xfer); |
| 992 | mp2->m_len -= xfer; |
| 993 | p += xfer; |
| 994 | siz2 -= xfer; |
| 995 | } |
| 996 | if (siz2 > 0) |
| 997 | mp2 = mp2->m_next; |
| 998 | } |
| 999 | mp->m_len = siz; |
| 1000 | *mdp = mp2; |
| 1001 | *dposp = mtod(mp2, caddr_t); |
| 1002 | } |
| 1003 | return (0); |
| 1004 | } |
| 1005 | |
| 1006 | /* |
| 1007 | * Advance the position in the mbuf chain. |
| 1008 | */ |
| 1009 | int |
| 1010 | nfs_adv(mdp, dposp, offs, left) |
| 1011 | struct mbuf **mdp; |
| 1012 | caddr_t *dposp; |
| 1013 | int offs; |
| 1014 | int left; |
| 1015 | { |
| 1016 | struct mbuf *m; |
| 1017 | int s; |
| 1018 | |
| 1019 | m = *mdp; |
| 1020 | s = left; |
| 1021 | while (s < offs) { |
| 1022 | offs -= s; |
| 1023 | m = m->m_next; |
| 1024 | if (m == NULL) |
| 1025 | return (EBADRPC); |
| 1026 | s = m->m_len; |
| 1027 | } |
| 1028 | *mdp = m; |
| 1029 | *dposp = mtod(m, caddr_t)+offs; |
| 1030 | return (0); |
| 1031 | } |
| 1032 | |
| 1033 | /* |
| 1034 | * Copy a string into mbufs for the hard cases... |
| 1035 | */ |
| 1036 | int |
| 1037 | nfsm_strtmbuf(mb, bpos, cp, siz) |
| 1038 | struct mbuf **mb; |
| 1039 | char **bpos; |
| 1040 | const char *cp; |
| 1041 | long siz; |
| 1042 | { |
| 1043 | struct mbuf *m1 = NULL, *m2; |
| 1044 | long left, xfer, len, tlen; |
| 1045 | u_int32_t *tl; |
| 1046 | int putsize; |
| 1047 | |
| 1048 | putsize = 1; |
| 1049 | m2 = *mb; |
| 1050 | left = M_TRAILINGSPACE(m2); |
| 1051 | if (left > 0) { |
| 1052 | tl = ((u_int32_t *)(*bpos)); |
| 1053 | *tl++ = txdr_unsigned(siz); |
| 1054 | putsize = 0; |
| 1055 | left -= NFSX_UNSIGNED; |
| 1056 | m2->m_len += NFSX_UNSIGNED; |
| 1057 | if (left > 0) { |
| 1058 | bcopy(cp, (caddr_t) tl, left); |
| 1059 | siz -= left; |
| 1060 | cp += left; |
| 1061 | m2->m_len += left; |
| 1062 | left = 0; |
| 1063 | } |
| 1064 | } |
| 1065 | /* Loop around adding mbufs */ |
| 1066 | while (siz > 0) { |
| 1067 | MGET(m1, M_WAIT, MT_DATA); |
| 1068 | if (siz > MLEN) |
| 1069 | MCLGET(m1, M_WAIT); |
| 1070 | m1->m_len = NFSMSIZ(m1); |
| 1071 | m2->m_next = m1; |
| 1072 | m2 = m1; |
| 1073 | tl = mtod(m1, u_int32_t *); |
| 1074 | tlen = 0; |
| 1075 | if (putsize) { |
| 1076 | *tl++ = txdr_unsigned(siz); |
| 1077 | m1->m_len -= NFSX_UNSIGNED; |
| 1078 | tlen = NFSX_UNSIGNED; |
| 1079 | putsize = 0; |
| 1080 | } |
| 1081 | if (siz < m1->m_len) { |
| 1082 | len = nfsm_rndup(siz); |
| 1083 | xfer = siz; |
| 1084 | if (xfer < len) |
| 1085 | *(tl+(xfer>>2)) = 0; |
| 1086 | } else { |
| 1087 | xfer = len = m1->m_len; |
| 1088 | } |
| 1089 | bcopy(cp, (caddr_t) tl, xfer); |
| 1090 | m1->m_len = len+tlen; |
| 1091 | siz -= xfer; |
| 1092 | cp += xfer; |
| 1093 | } |
| 1094 | *mb = m1; |
| 1095 | *bpos = mtod(m1, caddr_t)+m1->m_len; |
| 1096 | return (0); |
| 1097 | } |
| 1098 | |
| 1099 | /* |
| 1100 | * Called once to initialize data structures... |
| 1101 | */ |
| 1102 | int |
| 1103 | nfs_init(vfsp) |
| 1104 | struct vfsconf *vfsp; |
| 1105 | { |
| 1106 | int i; |
| 1107 | |
| 1108 | nfsmount_zone = zinit("NFSMOUNT", sizeof(struct nfsmount), 0, 0, 1); |
| 1109 | |
| 1110 | nfs_mount_type = vfsp->vfc_typenum; |
| 1111 | nfsrtt.pos = 0; |
| 1112 | rpc_vers = txdr_unsigned(RPC_VER2); |
| 1113 | rpc_call = txdr_unsigned(RPC_CALL); |
| 1114 | rpc_reply = txdr_unsigned(RPC_REPLY); |
| 1115 | rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); |
| 1116 | rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); |
| 1117 | rpc_mismatch = txdr_unsigned(RPC_MISMATCH); |
| 1118 | rpc_autherr = txdr_unsigned(RPC_AUTHERR); |
| 1119 | rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); |
| 1120 | rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); |
| 1121 | nfs_prog = txdr_unsigned(NFS_PROG); |
| 1122 | nqnfs_prog = txdr_unsigned(NQNFS_PROG); |
| 1123 | nfs_true = txdr_unsigned(TRUE); |
| 1124 | nfs_false = txdr_unsigned(FALSE); |
| 1125 | nfs_xdrneg1 = txdr_unsigned(-1); |
| 1126 | nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; |
| 1127 | if (nfs_ticks < 1) |
| 1128 | nfs_ticks = 1; |
| 1129 | /* Ensure async daemons disabled */ |
| 1130 | for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { |
| 1131 | nfs_iodwant[i] = NULL; |
| 1132 | nfs_iodmount[i] = (struct nfsmount *)0; |
| 1133 | } |
| 1134 | nfs_nhinit(); /* Init the nfsnode table */ |
| 1135 | #ifndef NFS_NOSERVER |
| 1136 | nfsrv_init(0); /* Init server data structures */ |
| 1137 | nfsrv_initcache(); /* Init the server request cache */ |
| 1138 | #endif |
| 1139 | |
| 1140 | /* |
| 1141 | * Initialize the nqnfs server stuff. |
| 1142 | */ |
| 1143 | if (nqnfsstarttime == 0) { |
| 1144 | nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease |
| 1145 | + nqsrv_clockskew + nqsrv_writeslack; |
| 1146 | NQLOADNOVRAM(nqnfsstarttime); |
| 1147 | CIRCLEQ_INIT(&nqtimerhead); |
| 1148 | nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); |
| 1149 | } |
| 1150 | |
| 1151 | /* |
| 1152 | * Initialize reply list and start timer |
| 1153 | */ |
| 1154 | TAILQ_INIT(&nfs_reqq); |
| 1155 | |
| 1156 | nfs_timer(0); |
| 1157 | |
| 1158 | /* |
| 1159 | * Set up lease_check and lease_updatetime so that other parts |
| 1160 | * of the system can call us, if we are loadable. |
| 1161 | */ |
| 1162 | #ifndef NFS_NOSERVER |
| 1163 | nfs_prev_vop_lease_check = default_vnodeop_p[VOFFSET(vop_lease)]; |
| 1164 | default_vnodeop_p[VOFFSET(vop_lease)] = (vop_t *)nqnfs_vop_lease_check; |
| 1165 | #endif |
| 1166 | nfs_prev_lease_updatetime = lease_updatetime; |
| 1167 | lease_updatetime = nfs_lease_updatetime; |
| 1168 | nfs_prev_nfssvc_sy_narg = sysent[SYS_nfssvc].sy_narg; |
| 1169 | sysent[SYS_nfssvc].sy_narg = 2; |
| 1170 | nfs_prev_nfssvc_sy_call = sysent[SYS_nfssvc].sy_call; |
| 1171 | sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc; |
| 1172 | |
| 1173 | nfs_pbuf_freecnt = nswbuf / 2 + 1; |
| 1174 | |
| 1175 | return (0); |
| 1176 | } |
| 1177 | |
| 1178 | int |
| 1179 | nfs_uninit(vfsp) |
| 1180 | struct vfsconf *vfsp; |
| 1181 | { |
| 1182 | |
| 1183 | untimeout(nfs_timer, (void *)NULL, nfs_timer_handle); |
| 1184 | nfs_mount_type = -1; |
| 1185 | #ifndef NFS_NOSERVER |
| 1186 | default_vnodeop_p[VOFFSET(vop_lease)] = nfs_prev_vop_lease_check; |
| 1187 | #endif |
| 1188 | lease_updatetime = nfs_prev_lease_updatetime; |
| 1189 | sysent[SYS_nfssvc].sy_narg = nfs_prev_nfssvc_sy_narg; |
| 1190 | sysent[SYS_nfssvc].sy_call = nfs_prev_nfssvc_sy_call; |
| 1191 | return (0); |
| 1192 | } |
| 1193 | |
| 1194 | /* |
| 1195 | * Attribute cache routines. |
| 1196 | * nfs_loadattrcache() - loads or updates the cache contents from attributes |
| 1197 | * that are on the mbuf list |
| 1198 | * nfs_getattrcache() - returns valid attributes if found in cache, returns |
| 1199 | * error otherwise |
| 1200 | */ |
| 1201 | |
| 1202 | /* |
| 1203 | * Load the attribute cache (that lives in the nfsnode entry) with |
| 1204 | * the values on the mbuf list and |
| 1205 | * Iff vap not NULL |
| 1206 | * copy the attributes to *vaper |
| 1207 | */ |
| 1208 | int |
| 1209 | nfs_loadattrcache(vpp, mdp, dposp, vaper, dontshrink) |
| 1210 | struct vnode **vpp; |
| 1211 | struct mbuf **mdp; |
| 1212 | caddr_t *dposp; |
| 1213 | struct vattr *vaper; |
| 1214 | int dontshrink; |
| 1215 | { |
| 1216 | struct vnode *vp = *vpp; |
| 1217 | struct vattr *vap; |
| 1218 | struct nfs_fattr *fp; |
| 1219 | struct nfsnode *np; |
| 1220 | int32_t t1; |
| 1221 | caddr_t cp2; |
| 1222 | int error = 0, rdev; |
| 1223 | struct mbuf *md; |
| 1224 | enum vtype vtyp; |
| 1225 | u_short vmode; |
| 1226 | struct timespec mtime; |
| 1227 | int v3 = NFS_ISV3(vp); |
| 1228 | |
| 1229 | md = *mdp; |
| 1230 | t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; |
| 1231 | if ((error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) != 0) |
| 1232 | return (error); |
| 1233 | fp = (struct nfs_fattr *)cp2; |
| 1234 | if (v3) { |
| 1235 | vtyp = nfsv3tov_type(fp->fa_type); |
| 1236 | vmode = fxdr_unsigned(u_short, fp->fa_mode); |
| 1237 | rdev = makeudev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), |
| 1238 | fxdr_unsigned(int, fp->fa3_rdev.specdata2)); |
| 1239 | fxdr_nfsv3time(&fp->fa3_mtime, &mtime); |
| 1240 | } else { |
| 1241 | vtyp = nfsv2tov_type(fp->fa_type); |
| 1242 | vmode = fxdr_unsigned(u_short, fp->fa_mode); |
| 1243 | /* |
| 1244 | * XXX |
| 1245 | * |
| 1246 | * The duplicate information returned in fa_type and fa_mode |
| 1247 | * is an ambiguity in the NFS version 2 protocol. |
| 1248 | * |
| 1249 | * VREG should be taken literally as a regular file. If a |
| 1250 | * server intents to return some type information differently |
| 1251 | * in the upper bits of the mode field (e.g. for sockets, or |
| 1252 | * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we |
| 1253 | * leave the examination of the mode bits even in the VREG |
| 1254 | * case to avoid breakage for bogus servers, but we make sure |
| 1255 | * that there are actually type bits set in the upper part of |
| 1256 | * fa_mode (and failing that, trust the va_type field). |
| 1257 | * |
| 1258 | * NFSv3 cleared the issue, and requires fa_mode to not |
| 1259 | * contain any type information (while also introduing sockets |
| 1260 | * and FIFOs for fa_type). |
| 1261 | */ |
| 1262 | if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) |
| 1263 | vtyp = IFTOVT(vmode); |
| 1264 | rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); |
| 1265 | fxdr_nfsv2time(&fp->fa2_mtime, &mtime); |
| 1266 | |
| 1267 | /* |
| 1268 | * Really ugly NFSv2 kludge. |
| 1269 | */ |
| 1270 | if (vtyp == VCHR && rdev == 0xffffffff) |
| 1271 | vtyp = VFIFO; |
| 1272 | } |
| 1273 | |
| 1274 | /* |
| 1275 | * If v_type == VNON it is a new node, so fill in the v_type, |
| 1276 | * n_mtime fields. Check to see if it represents a special |
| 1277 | * device, and if so, check for a possible alias. Once the |
| 1278 | * correct vnode has been obtained, fill in the rest of the |
| 1279 | * information. |
| 1280 | */ |
| 1281 | np = VTONFS(vp); |
| 1282 | if (vp->v_type != vtyp) { |
| 1283 | vp->v_type = vtyp; |
| 1284 | if (vp->v_type == VFIFO) { |
| 1285 | vp->v_op = fifo_nfsv2nodeop_p; |
| 1286 | } |
| 1287 | if (vp->v_type == VCHR || vp->v_type == VBLK) { |
| 1288 | vp->v_op = spec_nfsv2nodeop_p; |
| 1289 | addaliasu(vp, rdev); |
| 1290 | } |
| 1291 | np->n_mtime = mtime.tv_sec; |
| 1292 | } |
| 1293 | vap = &np->n_vattr; |
| 1294 | vap->va_type = vtyp; |
| 1295 | vap->va_mode = (vmode & 07777); |
| 1296 | vap->va_rdev = rdev; |
| 1297 | vap->va_mtime = mtime; |
| 1298 | vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; |
| 1299 | if (v3) { |
| 1300 | vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); |
| 1301 | vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); |
| 1302 | vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); |
| 1303 | vap->va_size = fxdr_hyper(&fp->fa3_size); |
| 1304 | vap->va_blocksize = NFS_FABLKSIZE; |
| 1305 | vap->va_bytes = fxdr_hyper(&fp->fa3_used); |
| 1306 | vap->va_fileid = fxdr_unsigned(int32_t, |
| 1307 | fp->fa3_fileid.nfsuquad[1]); |
| 1308 | fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); |
| 1309 | fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); |
| 1310 | vap->va_flags = 0; |
| 1311 | vap->va_filerev = 0; |
| 1312 | } else { |
| 1313 | vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); |
| 1314 | vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); |
| 1315 | vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); |
| 1316 | vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); |
| 1317 | vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); |
| 1318 | vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) |
| 1319 | * NFS_FABLKSIZE; |
| 1320 | vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); |
| 1321 | fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); |
| 1322 | vap->va_flags = 0; |
| 1323 | vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, |
| 1324 | fp->fa2_ctime.nfsv2_sec); |
| 1325 | vap->va_ctime.tv_nsec = 0; |
| 1326 | vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); |
| 1327 | vap->va_filerev = 0; |
| 1328 | } |
| 1329 | np->n_attrstamp = time_second; |
| 1330 | if (vap->va_size != np->n_size) { |
| 1331 | if (vap->va_type == VREG) { |
| 1332 | if (dontshrink && vap->va_size < np->n_size) { |
| 1333 | /* |
| 1334 | * We've been told not to shrink the file; |
| 1335 | * zero np->n_attrstamp to indicate that |
| 1336 | * the attributes are stale. |
| 1337 | */ |
| 1338 | vap->va_size = np->n_size; |
| 1339 | np->n_attrstamp = 0; |
| 1340 | } else if (np->n_flag & NMODIFIED) { |
| 1341 | if (vap->va_size < np->n_size) |
| 1342 | vap->va_size = np->n_size; |
| 1343 | else |
| 1344 | np->n_size = vap->va_size; |
| 1345 | } else { |
| 1346 | np->n_size = vap->va_size; |
| 1347 | } |
| 1348 | vnode_pager_setsize(vp, np->n_size); |
| 1349 | } else { |
| 1350 | np->n_size = vap->va_size; |
| 1351 | } |
| 1352 | } |
| 1353 | if (vaper != NULL) { |
| 1354 | bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); |
| 1355 | if (np->n_flag & NCHG) { |
| 1356 | if (np->n_flag & NACC) |
| 1357 | vaper->va_atime = np->n_atim; |
| 1358 | if (np->n_flag & NUPD) |
| 1359 | vaper->va_mtime = np->n_mtim; |
| 1360 | } |
| 1361 | } |
| 1362 | return (0); |
| 1363 | } |
| 1364 | |
| 1365 | #ifdef NFS_ACDEBUG |
| 1366 | #include <sys/sysctl.h> |
| 1367 | SYSCTL_DECL(_vfs_nfs); |
| 1368 | static int nfs_acdebug; |
| 1369 | SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, ""); |
| 1370 | #endif |
| 1371 | |
| 1372 | /* |
| 1373 | * Check the time stamp |
| 1374 | * If the cache is valid, copy contents to *vap and return 0 |
| 1375 | * otherwise return an error |
| 1376 | */ |
| 1377 | int |
| 1378 | nfs_getattrcache(vp, vaper) |
| 1379 | struct vnode *vp; |
| 1380 | struct vattr *vaper; |
| 1381 | { |
| 1382 | struct nfsnode *np; |
| 1383 | struct vattr *vap; |
| 1384 | struct nfsmount *nmp; |
| 1385 | int timeo; |
| 1386 | |
| 1387 | np = VTONFS(vp); |
| 1388 | vap = &np->n_vattr; |
| 1389 | nmp = VFSTONFS(vp->v_mount); |
| 1390 | /* XXX n_mtime doesn't seem to be updated on a miss-and-reload */ |
| 1391 | timeo = (time_second - np->n_mtime) / 10; |
| 1392 | |
| 1393 | #ifdef NFS_ACDEBUG |
| 1394 | if (nfs_acdebug>1) |
| 1395 | printf("nfs_getattrcache: initial timeo = %d\n", timeo); |
| 1396 | #endif |
| 1397 | |
| 1398 | if (vap->va_type == VDIR) { |
| 1399 | if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin) |
| 1400 | timeo = nmp->nm_acdirmin; |
| 1401 | else if (timeo > nmp->nm_acdirmax) |
| 1402 | timeo = nmp->nm_acdirmax; |
| 1403 | } else { |
| 1404 | if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin) |
| 1405 | timeo = nmp->nm_acregmin; |
| 1406 | else if (timeo > nmp->nm_acregmax) |
| 1407 | timeo = nmp->nm_acregmax; |
| 1408 | } |
| 1409 | |
| 1410 | #ifdef NFS_ACDEBUG |
| 1411 | if (nfs_acdebug > 2) |
| 1412 | printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n", |
| 1413 | nmp->nm_acregmin, nmp->nm_acregmax, |
| 1414 | nmp->nm_acdirmin, nmp->nm_acdirmax); |
| 1415 | |
| 1416 | if (nfs_acdebug) |
| 1417 | printf("nfs_getattrcache: age = %d; final timeo = %d\n", |
| 1418 | (time_second - np->n_attrstamp), timeo); |
| 1419 | #endif |
| 1420 | |
| 1421 | if ((time_second - np->n_attrstamp) >= timeo) { |
| 1422 | nfsstats.attrcache_misses++; |
| 1423 | return (ENOENT); |
| 1424 | } |
| 1425 | nfsstats.attrcache_hits++; |
| 1426 | if (vap->va_size != np->n_size) { |
| 1427 | if (vap->va_type == VREG) { |
| 1428 | if (np->n_flag & NMODIFIED) { |
| 1429 | if (vap->va_size < np->n_size) |
| 1430 | vap->va_size = np->n_size; |
| 1431 | else |
| 1432 | np->n_size = vap->va_size; |
| 1433 | } else { |
| 1434 | np->n_size = vap->va_size; |
| 1435 | } |
| 1436 | vnode_pager_setsize(vp, np->n_size); |
| 1437 | } else { |
| 1438 | np->n_size = vap->va_size; |
| 1439 | } |
| 1440 | } |
| 1441 | bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); |
| 1442 | if (np->n_flag & NCHG) { |
| 1443 | if (np->n_flag & NACC) |
| 1444 | vaper->va_atime = np->n_atim; |
| 1445 | if (np->n_flag & NUPD) |
| 1446 | vaper->va_mtime = np->n_mtim; |
| 1447 | } |
| 1448 | return (0); |
| 1449 | } |
| 1450 | |
| 1451 | #ifndef NFS_NOSERVER |
| 1452 | /* |
| 1453 | * Set up nameidata for a lookup() call and do it. |
| 1454 | * |
| 1455 | * If pubflag is set, this call is done for a lookup operation on the |
| 1456 | * public filehandle. In that case we allow crossing mountpoints and |
| 1457 | * absolute pathnames. However, the caller is expected to check that |
| 1458 | * the lookup result is within the public fs, and deny access if |
| 1459 | * it is not. |
| 1460 | * |
| 1461 | * nfs_namei() clears out garbage fields that namei() might leave garbage. |
| 1462 | * This is mainly ni_vp and ni_dvp when an error occurs, and ni_dvp when no |
| 1463 | * error occurs but the parent was not requested. |
| 1464 | * |
| 1465 | * dirp may be set whether an error is returned or not, and must be |
| 1466 | * released by the caller. |
| 1467 | */ |
| 1468 | int |
| 1469 | nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, td, kerbflag, pubflag) |
| 1470 | struct nameidata *ndp; |
| 1471 | fhandle_t *fhp; |
| 1472 | int len; |
| 1473 | struct nfssvc_sock *slp; |
| 1474 | struct sockaddr *nam; |
| 1475 | struct mbuf **mdp; |
| 1476 | caddr_t *dposp; |
| 1477 | struct vnode **retdirp; |
| 1478 | struct thread *td; |
| 1479 | int kerbflag, pubflag; |
| 1480 | { |
| 1481 | int i, rem; |
| 1482 | struct mbuf *md; |
| 1483 | char *fromcp, *tocp, *cp; |
| 1484 | struct iovec aiov; |
| 1485 | struct uio auio; |
| 1486 | struct vnode *dp; |
| 1487 | int error, rdonly, linklen; |
| 1488 | struct componentname *cnp = &ndp->ni_cnd; |
| 1489 | |
| 1490 | *retdirp = (struct vnode *)0; |
| 1491 | cnp->cn_pnbuf = zalloc(namei_zone); |
| 1492 | |
| 1493 | /* |
| 1494 | * Copy the name from the mbuf list to ndp->ni_pnbuf |
| 1495 | * and set the various ndp fields appropriately. |
| 1496 | */ |
| 1497 | fromcp = *dposp; |
| 1498 | tocp = cnp->cn_pnbuf; |
| 1499 | md = *mdp; |
| 1500 | rem = mtod(md, caddr_t) + md->m_len - fromcp; |
| 1501 | for (i = 0; i < len; i++) { |
| 1502 | while (rem == 0) { |
| 1503 | md = md->m_next; |
| 1504 | if (md == NULL) { |
| 1505 | error = EBADRPC; |
| 1506 | goto out; |
| 1507 | } |
| 1508 | fromcp = mtod(md, caddr_t); |
| 1509 | rem = md->m_len; |
| 1510 | } |
| 1511 | if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { |
| 1512 | error = EACCES; |
| 1513 | goto out; |
| 1514 | } |
| 1515 | *tocp++ = *fromcp++; |
| 1516 | rem--; |
| 1517 | } |
| 1518 | *tocp = '\0'; |
| 1519 | *mdp = md; |
| 1520 | *dposp = fromcp; |
| 1521 | len = nfsm_rndup(len)-len; |
| 1522 | if (len > 0) { |
| 1523 | if (rem >= len) |
| 1524 | *dposp += len; |
| 1525 | else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) |
| 1526 | goto out; |
| 1527 | } |
| 1528 | |
| 1529 | /* |
| 1530 | * Extract and set starting directory. |
| 1531 | */ |
| 1532 | error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, |
| 1533 | nam, &rdonly, kerbflag, pubflag); |
| 1534 | if (error) |
| 1535 | goto out; |
| 1536 | if (dp->v_type != VDIR) { |
| 1537 | vrele(dp); |
| 1538 | error = ENOTDIR; |
| 1539 | goto out; |
| 1540 | } |
| 1541 | |
| 1542 | if (rdonly) |
| 1543 | cnp->cn_flags |= CNP_RDONLY; |
| 1544 | |
| 1545 | /* |
| 1546 | * Set return directory. Reference to dp is implicitly transfered |
| 1547 | * to the returned pointer |
| 1548 | */ |
| 1549 | *retdirp = dp; |
| 1550 | |
| 1551 | if (pubflag) { |
| 1552 | /* |
| 1553 | * Oh joy. For WebNFS, handle those pesky '%' escapes, |
| 1554 | * and the 'native path' indicator. |
| 1555 | */ |
| 1556 | cp = zalloc(namei_zone); |
| 1557 | fromcp = cnp->cn_pnbuf; |
| 1558 | tocp = cp; |
| 1559 | if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { |
| 1560 | switch ((unsigned char)*fromcp) { |
| 1561 | case WEBNFS_NATIVE_CHAR: |
| 1562 | /* |
| 1563 | * 'Native' path for us is the same |
| 1564 | * as a path according to the NFS spec, |
| 1565 | * just skip the escape char. |
| 1566 | */ |
| 1567 | fromcp++; |
| 1568 | break; |
| 1569 | /* |
| 1570 | * More may be added in the future, range 0x80-0xff |
| 1571 | */ |
| 1572 | default: |
| 1573 | error = EIO; |
| 1574 | zfree(namei_zone, cp); |
| 1575 | goto out; |
| 1576 | } |
| 1577 | } |
| 1578 | /* |
| 1579 | * Translate the '%' escapes, URL-style. |
| 1580 | */ |
| 1581 | while (*fromcp != '\0') { |
| 1582 | if (*fromcp == WEBNFS_ESC_CHAR) { |
| 1583 | if (fromcp[1] != '\0' && fromcp[2] != '\0') { |
| 1584 | fromcp++; |
| 1585 | *tocp++ = HEXSTRTOI(fromcp); |
| 1586 | fromcp += 2; |
| 1587 | continue; |
| 1588 | } else { |
| 1589 | error = ENOENT; |
| 1590 | zfree(namei_zone, cp); |
| 1591 | goto out; |
| 1592 | } |
| 1593 | } else |
| 1594 | *tocp++ = *fromcp++; |
| 1595 | } |
| 1596 | *tocp = '\0'; |
| 1597 | zfree(namei_zone, cnp->cn_pnbuf); |
| 1598 | cnp->cn_pnbuf = cp; |
| 1599 | } |
| 1600 | |
| 1601 | ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; |
| 1602 | ndp->ni_segflg = UIO_SYSSPACE; |
| 1603 | |
| 1604 | if (pubflag) { |
| 1605 | ndp->ni_rootdir = rootvnode; |
| 1606 | ndp->ni_loopcnt = 0; |
| 1607 | if (cnp->cn_pnbuf[0] == '/') |
| 1608 | dp = rootvnode; |
| 1609 | } else { |
| 1610 | cnp->cn_flags |= CNP_NOCROSSMOUNT; |
| 1611 | } |
| 1612 | |
| 1613 | /* |
| 1614 | * Initialize for scan, set ni_startdir and bump ref on dp again |
| 1615 | * because lookup() will dereference ni_startdir. |
| 1616 | */ |
| 1617 | |
| 1618 | cnp->cn_td = td; |
| 1619 | VREF(dp); |
| 1620 | ndp->ni_startdir = dp; |
| 1621 | |
| 1622 | for (;;) { |
| 1623 | cnp->cn_nameptr = cnp->cn_pnbuf; |
| 1624 | /* |
| 1625 | * Call lookup() to do the real work. If an error occurs, |
| 1626 | * ndp->ni_vp and ni_dvp are left uninitialized or NULL and |
| 1627 | * we do not have to dereference anything before returning. |
| 1628 | * In either case ni_startdir will be dereferenced and NULLed |
| 1629 | * out. |
| 1630 | */ |
| 1631 | error = lookup(ndp); |
| 1632 | if (error) |
| 1633 | break; |
| 1634 | |
| 1635 | /* |
| 1636 | * Check for encountering a symbolic link. Trivial |
| 1637 | * termination occurs if no symlink encountered. |
| 1638 | * Note: zfree is safe because error is 0, so we will |
| 1639 | * not zfree it again when we break. |
| 1640 | */ |
| 1641 | if ((cnp->cn_flags & CNP_ISSYMLINK) == 0) { |
| 1642 | nfsrv_object_create(ndp->ni_vp); |
| 1643 | if (cnp->cn_flags & (CNP_SAVENAME | CNP_SAVESTART)) |
| 1644 | cnp->cn_flags |= CNP_HASBUF; |
| 1645 | else |
| 1646 | zfree(namei_zone, cnp->cn_pnbuf); |
| 1647 | break; |
| 1648 | } |
| 1649 | |
| 1650 | /* |
| 1651 | * Validate symlink |
| 1652 | */ |
| 1653 | if ((cnp->cn_flags & CNP_LOCKPARENT) && ndp->ni_pathlen == 1) |
| 1654 | VOP_UNLOCK(ndp->ni_dvp, NULL, 0, td); |
| 1655 | if (!pubflag) { |
| 1656 | error = EINVAL; |
| 1657 | goto badlink2; |
| 1658 | } |
| 1659 | |
| 1660 | if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { |
| 1661 | error = ELOOP; |
| 1662 | goto badlink2; |
| 1663 | } |
| 1664 | if (ndp->ni_pathlen > 1) |
| 1665 | cp = zalloc(namei_zone); |
| 1666 | else |
| 1667 | cp = cnp->cn_pnbuf; |
| 1668 | aiov.iov_base = cp; |
| 1669 | aiov.iov_len = MAXPATHLEN; |
| 1670 | auio.uio_iov = &aiov; |
| 1671 | auio.uio_iovcnt = 1; |
| 1672 | auio.uio_offset = 0; |
| 1673 | auio.uio_rw = UIO_READ; |
| 1674 | auio.uio_segflg = UIO_SYSSPACE; |
| 1675 | auio.uio_td = NULL; |
| 1676 | auio.uio_resid = MAXPATHLEN; |
| 1677 | error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); |
| 1678 | if (error) { |
| 1679 | badlink1: |
| 1680 | if (ndp->ni_pathlen > 1) |
| 1681 | zfree(namei_zone, cp); |
| 1682 | badlink2: |
| 1683 | vrele(ndp->ni_dvp); |
| 1684 | vput(ndp->ni_vp); |
| 1685 | break; |
| 1686 | } |
| 1687 | linklen = MAXPATHLEN - auio.uio_resid; |
| 1688 | if (linklen == 0) { |
| 1689 | error = ENOENT; |
| 1690 | goto badlink1; |
| 1691 | } |
| 1692 | if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { |
| 1693 | error = ENAMETOOLONG; |
| 1694 | goto badlink1; |
| 1695 | } |
| 1696 | |
| 1697 | /* |
| 1698 | * Adjust or replace path |
| 1699 | */ |
| 1700 | if (ndp->ni_pathlen > 1) { |
| 1701 | bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); |
| 1702 | zfree(namei_zone, cnp->cn_pnbuf); |
| 1703 | cnp->cn_pnbuf = cp; |
| 1704 | } else |
| 1705 | cnp->cn_pnbuf[linklen] = '\0'; |
| 1706 | ndp->ni_pathlen += linklen; |
| 1707 | |
| 1708 | /* |
| 1709 | * Cleanup refs for next loop and check if root directory |
| 1710 | * should replace current directory. Normally ni_dvp |
| 1711 | * becomes the new base directory and is cleaned up when |
| 1712 | * we loop. Explicitly null pointers after invalidation |
| 1713 | * to clarify operation. |
| 1714 | */ |
| 1715 | vput(ndp->ni_vp); |
| 1716 | ndp->ni_vp = NULL; |
| 1717 | |
| 1718 | if (cnp->cn_pnbuf[0] == '/') { |
| 1719 | vrele(ndp->ni_dvp); |
| 1720 | ndp->ni_dvp = ndp->ni_rootdir; |
| 1721 | VREF(ndp->ni_dvp); |
| 1722 | } |
| 1723 | ndp->ni_startdir = ndp->ni_dvp; |
| 1724 | ndp->ni_dvp = NULL; |
| 1725 | } |
| 1726 | |
| 1727 | /* |
| 1728 | * nfs_namei() guarentees that fields will not contain garbage |
| 1729 | * whether an error occurs or not. This allows the caller to track |
| 1730 | * cleanup state trivially. |
| 1731 | */ |
| 1732 | out: |
| 1733 | if (error) { |
| 1734 | zfree(namei_zone, cnp->cn_pnbuf); |
| 1735 | ndp->ni_vp = NULL; |
| 1736 | ndp->ni_dvp = NULL; |
| 1737 | ndp->ni_startdir = NULL; |
| 1738 | cnp->cn_flags &= ~CNP_HASBUF; |
| 1739 | } else if ((ndp->ni_cnd.cn_flags & (CNP_WANTPARENT|CNP_LOCKPARENT)) == 0) { |
| 1740 | ndp->ni_dvp = NULL; |
| 1741 | } |
| 1742 | return (error); |
| 1743 | } |
| 1744 | |
| 1745 | /* |
| 1746 | * A fiddled version of m_adj() that ensures null fill to a long |
| 1747 | * boundary and only trims off the back end |
| 1748 | */ |
| 1749 | void |
| 1750 | nfsm_adj(mp, len, nul) |
| 1751 | struct mbuf *mp; |
| 1752 | int len; |
| 1753 | int nul; |
| 1754 | { |
| 1755 | struct mbuf *m; |
| 1756 | int count, i; |
| 1757 | char *cp; |
| 1758 | |
| 1759 | /* |
| 1760 | * Trim from tail. Scan the mbuf chain, |
| 1761 | * calculating its length and finding the last mbuf. |
| 1762 | * If the adjustment only affects this mbuf, then just |
| 1763 | * adjust and return. Otherwise, rescan and truncate |
| 1764 | * after the remaining size. |
| 1765 | */ |
| 1766 | count = 0; |
| 1767 | m = mp; |
| 1768 | for (;;) { |
| 1769 | count += m->m_len; |
| 1770 | if (m->m_next == (struct mbuf *)0) |
| 1771 | break; |
| 1772 | m = m->m_next; |
| 1773 | } |
| 1774 | if (m->m_len > len) { |
| 1775 | m->m_len -= len; |
| 1776 | if (nul > 0) { |
| 1777 | cp = mtod(m, caddr_t)+m->m_len-nul; |
| 1778 | for (i = 0; i < nul; i++) |
| 1779 | *cp++ = '\0'; |
| 1780 | } |
| 1781 | return; |
| 1782 | } |
| 1783 | count -= len; |
| 1784 | if (count < 0) |
| 1785 | count = 0; |
| 1786 | /* |
| 1787 | * Correct length for chain is "count". |
| 1788 | * Find the mbuf with last data, adjust its length, |
| 1789 | * and toss data from remaining mbufs on chain. |
| 1790 | */ |
| 1791 | for (m = mp; m; m = m->m_next) { |
| 1792 | if (m->m_len >= count) { |
| 1793 | m->m_len = count; |
| 1794 | if (nul > 0) { |
| 1795 | cp = mtod(m, caddr_t)+m->m_len-nul; |
| 1796 | for (i = 0; i < nul; i++) |
| 1797 | *cp++ = '\0'; |
| 1798 | } |
| 1799 | break; |
| 1800 | } |
| 1801 | count -= m->m_len; |
| 1802 | } |
| 1803 | for (m = m->m_next;m;m = m->m_next) |
| 1804 | m->m_len = 0; |
| 1805 | } |
| 1806 | |
| 1807 | /* |
| 1808 | * Make these functions instead of macros, so that the kernel text size |
| 1809 | * doesn't get too big... |
| 1810 | */ |
| 1811 | void |
| 1812 | nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) |
| 1813 | struct nfsrv_descript *nfsd; |
| 1814 | int before_ret; |
| 1815 | struct vattr *before_vap; |
| 1816 | int after_ret; |
| 1817 | struct vattr *after_vap; |
| 1818 | struct mbuf **mbp; |
| 1819 | char **bposp; |
| 1820 | { |
| 1821 | struct mbuf *mb = *mbp, *mb2; |
| 1822 | char *bpos = *bposp; |
| 1823 | u_int32_t *tl; |
| 1824 | |
| 1825 | if (before_ret) { |
| 1826 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); |
| 1827 | *tl = nfs_false; |
| 1828 | } else { |
| 1829 | nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); |
| 1830 | *tl++ = nfs_true; |
| 1831 | txdr_hyper(before_vap->va_size, tl); |
| 1832 | tl += 2; |
| 1833 | txdr_nfsv3time(&(before_vap->va_mtime), tl); |
| 1834 | tl += 2; |
| 1835 | txdr_nfsv3time(&(before_vap->va_ctime), tl); |
| 1836 | } |
| 1837 | *bposp = bpos; |
| 1838 | *mbp = mb; |
| 1839 | nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); |
| 1840 | } |
| 1841 | |
| 1842 | void |
| 1843 | nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) |
| 1844 | struct nfsrv_descript *nfsd; |
| 1845 | int after_ret; |
| 1846 | struct vattr *after_vap; |
| 1847 | struct mbuf **mbp; |
| 1848 | char **bposp; |
| 1849 | { |
| 1850 | struct mbuf *mb = *mbp, *mb2; |
| 1851 | char *bpos = *bposp; |
| 1852 | u_int32_t *tl; |
| 1853 | struct nfs_fattr *fp; |
| 1854 | |
| 1855 | if (after_ret) { |
| 1856 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); |
| 1857 | *tl = nfs_false; |
| 1858 | } else { |
| 1859 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); |
| 1860 | *tl++ = nfs_true; |
| 1861 | fp = (struct nfs_fattr *)tl; |
| 1862 | nfsm_srvfattr(nfsd, after_vap, fp); |
| 1863 | } |
| 1864 | *mbp = mb; |
| 1865 | *bposp = bpos; |
| 1866 | } |
| 1867 | |
| 1868 | void |
| 1869 | nfsm_srvfattr(nfsd, vap, fp) |
| 1870 | struct nfsrv_descript *nfsd; |
| 1871 | struct vattr *vap; |
| 1872 | struct nfs_fattr *fp; |
| 1873 | { |
| 1874 | |
| 1875 | fp->fa_nlink = txdr_unsigned(vap->va_nlink); |
| 1876 | fp->fa_uid = txdr_unsigned(vap->va_uid); |
| 1877 | fp->fa_gid = txdr_unsigned(vap->va_gid); |
| 1878 | if (nfsd->nd_flag & ND_NFSV3) { |
| 1879 | fp->fa_type = vtonfsv3_type(vap->va_type); |
| 1880 | fp->fa_mode = vtonfsv3_mode(vap->va_mode); |
| 1881 | txdr_hyper(vap->va_size, &fp->fa3_size); |
| 1882 | txdr_hyper(vap->va_bytes, &fp->fa3_used); |
| 1883 | fp->fa3_rdev.specdata1 = txdr_unsigned(umajor(vap->va_rdev)); |
| 1884 | fp->fa3_rdev.specdata2 = txdr_unsigned(uminor(vap->va_rdev)); |
| 1885 | fp->fa3_fsid.nfsuquad[0] = 0; |
| 1886 | fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); |
| 1887 | fp->fa3_fileid.nfsuquad[0] = 0; |
| 1888 | fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); |
| 1889 | txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); |
| 1890 | txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); |
| 1891 | txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); |
| 1892 | } else { |
| 1893 | fp->fa_type = vtonfsv2_type(vap->va_type); |
| 1894 | fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); |
| 1895 | fp->fa2_size = txdr_unsigned(vap->va_size); |
| 1896 | fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); |
| 1897 | if (vap->va_type == VFIFO) |
| 1898 | fp->fa2_rdev = 0xffffffff; |
| 1899 | else |
| 1900 | fp->fa2_rdev = txdr_unsigned(vap->va_rdev); |
| 1901 | fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); |
| 1902 | fp->fa2_fsid = txdr_unsigned(vap->va_fsid); |
| 1903 | fp->fa2_fileid = txdr_unsigned(vap->va_fileid); |
| 1904 | txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); |
| 1905 | txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); |
| 1906 | txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); |
| 1907 | } |
| 1908 | } |
| 1909 | |
| 1910 | /* |
| 1911 | * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) |
| 1912 | * - look up fsid in mount list (if not found ret error) |
| 1913 | * - get vp and export rights by calling VFS_FHTOVP() |
| 1914 | * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon |
| 1915 | * - if not lockflag unlock it with VOP_UNLOCK() |
| 1916 | */ |
| 1917 | int |
| 1918 | nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) |
| 1919 | fhandle_t *fhp; |
| 1920 | int lockflag; |
| 1921 | struct vnode **vpp; |
| 1922 | struct ucred *cred; |
| 1923 | struct nfssvc_sock *slp; |
| 1924 | struct sockaddr *nam; |
| 1925 | int *rdonlyp; |
| 1926 | int kerbflag; |
| 1927 | int pubflag; |
| 1928 | { |
| 1929 | struct thread *td = curthread; /* XXX */ |
| 1930 | struct mount *mp; |
| 1931 | int i; |
| 1932 | struct ucred *credanon; |
| 1933 | int error, exflags; |
| 1934 | #ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */ |
| 1935 | struct sockaddr_int *saddr; |
| 1936 | #endif |
| 1937 | |
| 1938 | *vpp = (struct vnode *)0; |
| 1939 | |
| 1940 | if (nfs_ispublicfh(fhp)) { |
| 1941 | if (!pubflag || !nfs_pub.np_valid) |
| 1942 | return (ESTALE); |
| 1943 | fhp = &nfs_pub.np_handle; |
| 1944 | } |
| 1945 | |
| 1946 | mp = vfs_getvfs(&fhp->fh_fsid); |
| 1947 | if (!mp) |
| 1948 | return (ESTALE); |
| 1949 | error = VFS_CHECKEXP(mp, nam, &exflags, &credanon); |
| 1950 | if (error) |
| 1951 | return (error); |
| 1952 | error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp); |
| 1953 | if (error) |
| 1954 | return (error); |
| 1955 | #ifdef MNT_EXNORESPORT |
| 1956 | if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { |
| 1957 | saddr = (struct sockaddr_in *)nam; |
| 1958 | if (saddr->sin_family == AF_INET && |
| 1959 | ntohs(saddr->sin_port) >= IPPORT_RESERVED) { |
| 1960 | vput(*vpp); |
| 1961 | *vpp = NULL; |
| 1962 | return (NFSERR_AUTHERR | AUTH_TOOWEAK); |
| 1963 | } |
| 1964 | } |
| 1965 | #endif |
| 1966 | /* |
| 1967 | * Check/setup credentials. |
| 1968 | */ |
| 1969 | if (exflags & MNT_EXKERB) { |
| 1970 | if (!kerbflag) { |
| 1971 | vput(*vpp); |
| 1972 | *vpp = NULL; |
| 1973 | return (NFSERR_AUTHERR | AUTH_TOOWEAK); |
| 1974 | } |
| 1975 | } else if (kerbflag) { |
| 1976 | vput(*vpp); |
| 1977 | *vpp = NULL; |
| 1978 | return (NFSERR_AUTHERR | AUTH_TOOWEAK); |
| 1979 | } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { |
| 1980 | cred->cr_uid = credanon->cr_uid; |
| 1981 | for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) |
| 1982 | cred->cr_groups[i] = credanon->cr_groups[i]; |
| 1983 | cred->cr_ngroups = i; |
| 1984 | } |
| 1985 | if (exflags & MNT_EXRDONLY) |
| 1986 | *rdonlyp = 1; |
| 1987 | else |
| 1988 | *rdonlyp = 0; |
| 1989 | |
| 1990 | nfsrv_object_create(*vpp); |
| 1991 | |
| 1992 | if (!lockflag) |
| 1993 | VOP_UNLOCK(*vpp, NULL, 0, td); |
| 1994 | return (0); |
| 1995 | } |
| 1996 | |
| 1997 | |
| 1998 | /* |
| 1999 | * WebNFS: check if a filehandle is a public filehandle. For v3, this |
| 2000 | * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has |
| 2001 | * transformed this to all zeroes in both cases, so check for it. |
| 2002 | */ |
| 2003 | int |
| 2004 | nfs_ispublicfh(fhp) |
| 2005 | fhandle_t *fhp; |
| 2006 | { |
| 2007 | char *cp = (char *)fhp; |
| 2008 | int i; |
| 2009 | |
| 2010 | for (i = 0; i < NFSX_V3FH; i++) |
| 2011 | if (*cp++ != 0) |
| 2012 | return (FALSE); |
| 2013 | return (TRUE); |
| 2014 | } |
| 2015 | |
| 2016 | #endif /* NFS_NOSERVER */ |
| 2017 | /* |
| 2018 | * This function compares two net addresses by family and returns TRUE |
| 2019 | * if they are the same host. |
| 2020 | * If there is any doubt, return FALSE. |
| 2021 | * The AF_INET family is handled as a special case so that address mbufs |
| 2022 | * don't need to be saved to store "struct in_addr", which is only 4 bytes. |
| 2023 | */ |
| 2024 | int |
| 2025 | netaddr_match(family, haddr, nam) |
| 2026 | int family; |
| 2027 | union nethostaddr *haddr; |
| 2028 | struct sockaddr *nam; |
| 2029 | { |
| 2030 | struct sockaddr_in *inetaddr; |
| 2031 | |
| 2032 | switch (family) { |
| 2033 | case AF_INET: |
| 2034 | inetaddr = (struct sockaddr_in *)nam; |
| 2035 | if (inetaddr->sin_family == AF_INET && |
| 2036 | inetaddr->sin_addr.s_addr == haddr->had_inetaddr) |
| 2037 | return (1); |
| 2038 | break; |
| 2039 | default: |
| 2040 | break; |
| 2041 | }; |
| 2042 | return (0); |
| 2043 | } |
| 2044 | |
| 2045 | static nfsuint64 nfs_nullcookie = { { 0, 0 } }; |
| 2046 | /* |
| 2047 | * This function finds the directory cookie that corresponds to the |
| 2048 | * logical byte offset given. |
| 2049 | */ |
| 2050 | nfsuint64 * |
| 2051 | nfs_getcookie(np, off, add) |
| 2052 | struct nfsnode *np; |
| 2053 | off_t off; |
| 2054 | int add; |
| 2055 | { |
| 2056 | struct nfsdmap *dp, *dp2; |
| 2057 | int pos; |
| 2058 | |
| 2059 | pos = (uoff_t)off / NFS_DIRBLKSIZ; |
| 2060 | if (pos == 0 || off < 0) { |
| 2061 | #ifdef DIAGNOSTIC |
| 2062 | if (add) |
| 2063 | panic("nfs getcookie add at <= 0"); |
| 2064 | #endif |
| 2065 | return (&nfs_nullcookie); |
| 2066 | } |
| 2067 | pos--; |
| 2068 | dp = np->n_cookies.lh_first; |
| 2069 | if (!dp) { |
| 2070 | if (add) { |
| 2071 | MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), |
| 2072 | M_NFSDIROFF, M_WAITOK); |
| 2073 | dp->ndm_eocookie = 0; |
| 2074 | LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); |
| 2075 | } else |
| 2076 | return ((nfsuint64 *)0); |
| 2077 | } |
| 2078 | while (pos >= NFSNUMCOOKIES) { |
| 2079 | pos -= NFSNUMCOOKIES; |
| 2080 | if (dp->ndm_list.le_next) { |
| 2081 | if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && |
| 2082 | pos >= dp->ndm_eocookie) |
| 2083 | return ((nfsuint64 *)0); |
| 2084 | dp = dp->ndm_list.le_next; |
| 2085 | } else if (add) { |
| 2086 | MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), |
| 2087 | M_NFSDIROFF, M_WAITOK); |
| 2088 | dp2->ndm_eocookie = 0; |
| 2089 | LIST_INSERT_AFTER(dp, dp2, ndm_list); |
| 2090 | dp = dp2; |
| 2091 | } else |
| 2092 | return ((nfsuint64 *)0); |
| 2093 | } |
| 2094 | if (pos >= dp->ndm_eocookie) { |
| 2095 | if (add) |
| 2096 | dp->ndm_eocookie = pos + 1; |
| 2097 | else |
| 2098 | return ((nfsuint64 *)0); |
| 2099 | } |
| 2100 | return (&dp->ndm_cookies[pos]); |
| 2101 | } |
| 2102 | |
| 2103 | /* |
| 2104 | * Invalidate cached directory information, except for the actual directory |
| 2105 | * blocks (which are invalidated separately). |
| 2106 | * Done mainly to avoid the use of stale offset cookies. |
| 2107 | */ |
| 2108 | void |
| 2109 | nfs_invaldir(vp) |
| 2110 | struct vnode *vp; |
| 2111 | { |
| 2112 | struct nfsnode *np = VTONFS(vp); |
| 2113 | |
| 2114 | #ifdef DIAGNOSTIC |
| 2115 | if (vp->v_type != VDIR) |
| 2116 | panic("nfs: invaldir not dir"); |
| 2117 | #endif |
| 2118 | np->n_direofoffset = 0; |
| 2119 | np->n_cookieverf.nfsuquad[0] = 0; |
| 2120 | np->n_cookieverf.nfsuquad[1] = 0; |
| 2121 | if (np->n_cookies.lh_first) |
| 2122 | np->n_cookies.lh_first->ndm_eocookie = 0; |
| 2123 | } |
| 2124 | |
| 2125 | /* |
| 2126 | * The write verifier has changed (probably due to a server reboot), so all |
| 2127 | * B_NEEDCOMMIT blocks will have to be written again. Since they are on the |
| 2128 | * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT |
| 2129 | * and B_CLUSTEROK flags. Once done the new write verifier can be set for the |
| 2130 | * mount point. |
| 2131 | * |
| 2132 | * B_CLUSTEROK must be cleared along with B_NEEDCOMMIT because stage 1 data |
| 2133 | * writes are not clusterable. |
| 2134 | */ |
| 2135 | void |
| 2136 | nfs_clearcommit(mp) |
| 2137 | struct mount *mp; |
| 2138 | { |
| 2139 | struct vnode *vp, *nvp; |
| 2140 | struct buf *bp, *nbp; |
| 2141 | lwkt_tokref ilock; |
| 2142 | int s; |
| 2143 | |
| 2144 | lwkt_gettoken(&ilock, &mntvnode_token); |
| 2145 | s = splbio(); |
| 2146 | for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp; vp = nvp) { |
| 2147 | nvp = TAILQ_NEXT(vp, v_nmntvnodes); /* ZZZ */ |
| 2148 | if (vp->v_flag & VPLACEMARKER) |
| 2149 | continue; |
| 2150 | for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { |
| 2151 | nbp = TAILQ_NEXT(bp, b_vnbufs); |
| 2152 | if (BUF_REFCNT(bp) == 0 && |
| 2153 | (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) |
| 2154 | == (B_DELWRI | B_NEEDCOMMIT)) { |
| 2155 | bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); |
| 2156 | } |
| 2157 | } |
| 2158 | } |
| 2159 | splx(s); |
| 2160 | lwkt_reltoken(&ilock); |
| 2161 | } |
| 2162 | |
| 2163 | #ifndef NFS_NOSERVER |
| 2164 | /* |
| 2165 | * Map errnos to NFS error numbers. For Version 3 also filter out error |
| 2166 | * numbers not specified for the associated procedure. |
| 2167 | */ |
| 2168 | int |
| 2169 | nfsrv_errmap(nd, err) |
| 2170 | struct nfsrv_descript *nd; |
| 2171 | int err; |
| 2172 | { |
| 2173 | short *defaulterrp, *errp; |
| 2174 | |
| 2175 | if (nd->nd_flag & ND_NFSV3) { |
| 2176 | if (nd->nd_procnum <= NFSPROC_COMMIT) { |
| 2177 | errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; |
| 2178 | while (*++errp) { |
| 2179 | if (*errp == err) |
| 2180 | return (err); |
| 2181 | else if (*errp > err) |
| 2182 | break; |
| 2183 | } |
| 2184 | return ((int)*defaulterrp); |
| 2185 | } else |
| 2186 | return (err & 0xffff); |
| 2187 | } |
| 2188 | if (err <= ELAST) |
| 2189 | return ((int)nfsrv_v2errmap[err - 1]); |
| 2190 | return (NFSERR_IO); |
| 2191 | } |
| 2192 | |
| 2193 | int |
| 2194 | nfsrv_object_create(struct vnode *vp) |
| 2195 | { |
| 2196 | struct thread *td = curthread; |
| 2197 | |
| 2198 | if (vp == NULL || vp->v_type != VREG) |
| 2199 | return (1); |
| 2200 | return (vfs_object_create(vp, td)); |
| 2201 | } |
| 2202 | |
| 2203 | /* |
| 2204 | * Sort the group list in increasing numerical order. |
| 2205 | * (Insertion sort by Chris Torek, who was grossed out by the bubble sort |
| 2206 | * that used to be here.) |
| 2207 | */ |
| 2208 | void |
| 2209 | nfsrvw_sort(list, num) |
| 2210 | gid_t *list; |
| 2211 | int num; |
| 2212 | { |
| 2213 | int i, j; |
| 2214 | gid_t v; |
| 2215 | |
| 2216 | /* Insertion sort. */ |
| 2217 | for (i = 1; i < num; i++) { |
| 2218 | v = list[i]; |
| 2219 | /* find correct slot for value v, moving others up */ |
| 2220 | for (j = i; --j >= 0 && v < list[j];) |
| 2221 | list[j + 1] = list[j]; |
| 2222 | list[j + 1] = v; |
| 2223 | } |
| 2224 | } |
| 2225 | |
| 2226 | /* |
| 2227 | * copy credentials making sure that the result can be compared with bcmp(). |
| 2228 | */ |
| 2229 | void |
| 2230 | nfsrv_setcred(incred, outcred) |
| 2231 | struct ucred *incred, *outcred; |
| 2232 | { |
| 2233 | int i; |
| 2234 | |
| 2235 | bzero((caddr_t)outcred, sizeof (struct ucred)); |
| 2236 | outcred->cr_ref = 1; |
| 2237 | outcred->cr_uid = incred->cr_uid; |
| 2238 | outcred->cr_ngroups = incred->cr_ngroups; |
| 2239 | for (i = 0; i < incred->cr_ngroups; i++) |
| 2240 | outcred->cr_groups[i] = incred->cr_groups[i]; |
| 2241 | nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); |
| 2242 | } |
| 2243 | #endif /* NFS_NOSERVER */ |