nfs_subs.c revision 1.221.2.5
1 1.221.2.5 yamt /* $NetBSD: nfs_subs.c,v 1.221.2.5 2014/05/22 11:41:11 yamt Exp $ */ 2 1.14 cgd 3 1.1 cgd /* 4 1.12 mycroft * Copyright (c) 1989, 1993 5 1.12 mycroft * The Regents of the University of California. All rights reserved. 6 1.1 cgd * 7 1.1 cgd * This code is derived from software contributed to Berkeley by 8 1.1 cgd * Rick Macklem at The University of Guelph. 9 1.1 cgd * 10 1.1 cgd * Redistribution and use in source and binary forms, with or without 11 1.1 cgd * modification, are permitted provided that the following conditions 12 1.1 cgd * are met: 13 1.1 cgd * 1. Redistributions of source code must retain the above copyright 14 1.1 cgd * notice, this list of conditions and the following disclaimer. 15 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright 16 1.1 cgd * notice, this list of conditions and the following disclaimer in the 17 1.1 cgd * documentation and/or other materials provided with the distribution. 18 1.127 agc * 3. Neither the name of the University nor the names of its contributors 19 1.1 cgd * may be used to endorse or promote products derived from this software 20 1.1 cgd * without specific prior written permission. 21 1.1 cgd * 22 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 1.1 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 1.1 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 1.1 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 1.1 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 1.1 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 1.1 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 1.1 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 1.1 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 1.1 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 1.1 cgd * SUCH DAMAGE. 33 1.1 cgd * 34 1.25 fvdl * @(#)nfs_subs.c 8.8 (Berkeley) 5/22/95 35 1.1 cgd */ 36 1.1 cgd 37 1.83 fvdl /* 38 1.83 fvdl * Copyright 2000 Wasabi Systems, Inc. 39 1.83 fvdl * All rights reserved. 40 1.83 fvdl * 41 1.83 fvdl * Written by Frank van der Linden for Wasabi Systems, Inc. 42 1.83 fvdl * 43 1.83 fvdl * Redistribution and use in source and binary forms, with or without 44 1.83 fvdl * modification, are permitted provided that the following conditions 45 1.83 fvdl * are met: 46 1.83 fvdl * 1. Redistributions of source code must retain the above copyright 47 1.83 fvdl * notice, this list of conditions and the following disclaimer. 48 1.83 fvdl * 2. Redistributions in binary form must reproduce the above copyright 49 1.83 fvdl * notice, this list of conditions and the following disclaimer in the 50 1.83 fvdl * documentation and/or other materials provided with the distribution. 51 1.83 fvdl * 3. All advertising materials mentioning features or use of this software 52 1.83 fvdl * must display the following acknowledgement: 53 1.83 fvdl * This product includes software developed for the NetBSD Project by 54 1.83 fvdl * Wasabi Systems, Inc. 55 1.83 fvdl * 4. The name of Wasabi Systems, Inc. may not be used to endorse 56 1.83 fvdl * or promote products derived from this software without specific prior 57 1.83 fvdl * written permission. 58 1.83 fvdl * 59 1.83 fvdl * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 60 1.83 fvdl * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 61 1.83 fvdl * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 62 1.83 fvdl * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 63 1.83 fvdl * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 64 1.83 fvdl * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 65 1.83 fvdl * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 66 1.83 fvdl * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 67 1.83 fvdl * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 68 1.83 fvdl * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 69 1.83 fvdl * POSSIBILITY OF SUCH DAMAGE. 70 1.83 fvdl */ 71 1.99 lukem 72 1.99 lukem #include <sys/cdefs.h> 73 1.221.2.5 yamt __KERNEL_RCSID(0, "$NetBSD: nfs_subs.c,v 1.221.2.5 2014/05/22 11:41:11 yamt Exp $"); 74 1.83 fvdl 75 1.210 ad #ifdef _KERNEL_OPT 76 1.82 bjh21 #include "opt_nfs.h" 77 1.210 ad #endif 78 1.25 fvdl 79 1.1 cgd /* 80 1.1 cgd * These functions support the macros and help fiddle mbuf chains for 81 1.1 cgd * the nfs op functions. They do things like create the rpc header and 82 1.1 cgd * copy data between mbuf chains and uio lists. 83 1.1 cgd */ 84 1.9 mycroft #include <sys/param.h> 85 1.9 mycroft #include <sys/proc.h> 86 1.9 mycroft #include <sys/systm.h> 87 1.9 mycroft #include <sys/kernel.h> 88 1.196 yamt #include <sys/kmem.h> 89 1.9 mycroft #include <sys/mount.h> 90 1.9 mycroft #include <sys/vnode.h> 91 1.9 mycroft #include <sys/namei.h> 92 1.9 mycroft #include <sys/mbuf.h> 93 1.12 mycroft #include <sys/socket.h> 94 1.12 mycroft #include <sys/stat.h> 95 1.98 fvdl #include <sys/filedesc.h> 96 1.30 fvdl #include <sys/time.h> 97 1.43 fvdl #include <sys/dirent.h> 98 1.155 thorpej #include <sys/once.h> 99 1.162 elad #include <sys/kauth.h> 100 1.207 pooka #include <sys/atomic.h> 101 1.221.2.4 yamt #include <sys/cprng.h> 102 1.1 cgd 103 1.220 uebayasi #include <uvm/uvm.h> 104 1.221.2.2 yamt #include <uvm/uvm_page_array.h> 105 1.51 mrg 106 1.9 mycroft #include <nfs/rpcv2.h> 107 1.25 fvdl #include <nfs/nfsproto.h> 108 1.9 mycroft #include <nfs/nfsnode.h> 109 1.9 mycroft #include <nfs/nfs.h> 110 1.9 mycroft #include <nfs/xdr_subs.h> 111 1.9 mycroft #include <nfs/nfsm_subs.h> 112 1.12 mycroft #include <nfs/nfsmount.h> 113 1.12 mycroft #include <nfs/nfsrtt.h> 114 1.24 christos #include <nfs/nfs_var.h> 115 1.12 mycroft 116 1.12 mycroft #include <miscfs/specfs/specdev.h> 117 1.24 christos 118 1.12 mycroft #include <netinet/in.h> 119 1.1 cgd 120 1.207 pooka static u_int32_t nfs_xid; 121 1.207 pooka 122 1.218 christos int nuidhash_max = NFS_MAXUIDHASH; 123 1.1 cgd /* 124 1.1 cgd * Data items converted to xdr at startup, since they are constant 125 1.1 cgd * This is kinda hokey, but may save a little time doing byte swaps 126 1.1 cgd */ 127 1.22 cgd u_int32_t nfs_xdrneg1; 128 1.22 cgd u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 129 1.25 fvdl rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 130 1.12 mycroft rpc_auth_kerb; 131 1.179 yamt u_int32_t nfs_prog, nfs_true, nfs_false; 132 1.12 mycroft 133 1.1 cgd /* And other global data */ 134 1.90 jdolecek const nfstype nfsv2_type[9] = 135 1.90 jdolecek { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON, NFCHR, NFNON }; 136 1.90 jdolecek const nfstype nfsv3_type[9] = 137 1.90 jdolecek { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFSOCK, NFFIFO, NFNON }; 138 1.90 jdolecek const enum vtype nv2tov_type[8] = 139 1.90 jdolecek { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON }; 140 1.90 jdolecek const enum vtype nv3tov_type[8] = 141 1.90 jdolecek { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO }; 142 1.25 fvdl int nfs_ticks; 143 1.108 christos 144 1.35 thorpej /* NFS client/server stats. */ 145 1.35 thorpej struct nfsstats nfsstats; 146 1.35 thorpej 147 1.25 fvdl /* 148 1.25 fvdl * Mapping of old NFS Version 2 RPC numbers to generic numbers. 149 1.25 fvdl */ 150 1.90 jdolecek const int nfsv3_procid[NFS_NPROCS] = { 151 1.25 fvdl NFSPROC_NULL, 152 1.25 fvdl NFSPROC_GETATTR, 153 1.25 fvdl NFSPROC_SETATTR, 154 1.25 fvdl NFSPROC_NOOP, 155 1.25 fvdl NFSPROC_LOOKUP, 156 1.25 fvdl NFSPROC_READLINK, 157 1.25 fvdl NFSPROC_READ, 158 1.25 fvdl NFSPROC_NOOP, 159 1.25 fvdl NFSPROC_WRITE, 160 1.25 fvdl NFSPROC_CREATE, 161 1.25 fvdl NFSPROC_REMOVE, 162 1.25 fvdl NFSPROC_RENAME, 163 1.25 fvdl NFSPROC_LINK, 164 1.25 fvdl NFSPROC_SYMLINK, 165 1.25 fvdl NFSPROC_MKDIR, 166 1.25 fvdl NFSPROC_RMDIR, 167 1.25 fvdl NFSPROC_READDIR, 168 1.25 fvdl NFSPROC_FSSTAT, 169 1.25 fvdl NFSPROC_NOOP, 170 1.25 fvdl NFSPROC_NOOP, 171 1.25 fvdl NFSPROC_NOOP, 172 1.25 fvdl NFSPROC_NOOP, 173 1.25 fvdl NFSPROC_NOOP 174 1.25 fvdl }; 175 1.25 fvdl 176 1.25 fvdl /* 177 1.25 fvdl * and the reverse mapping from generic to Version 2 procedure numbers 178 1.25 fvdl */ 179 1.90 jdolecek const int nfsv2_procid[NFS_NPROCS] = { 180 1.25 fvdl NFSV2PROC_NULL, 181 1.25 fvdl NFSV2PROC_GETATTR, 182 1.25 fvdl NFSV2PROC_SETATTR, 183 1.25 fvdl NFSV2PROC_LOOKUP, 184 1.25 fvdl NFSV2PROC_NOOP, 185 1.25 fvdl NFSV2PROC_READLINK, 186 1.25 fvdl NFSV2PROC_READ, 187 1.25 fvdl NFSV2PROC_WRITE, 188 1.25 fvdl NFSV2PROC_CREATE, 189 1.25 fvdl NFSV2PROC_MKDIR, 190 1.25 fvdl NFSV2PROC_SYMLINK, 191 1.25 fvdl NFSV2PROC_CREATE, 192 1.25 fvdl NFSV2PROC_REMOVE, 193 1.25 fvdl NFSV2PROC_RMDIR, 194 1.25 fvdl NFSV2PROC_RENAME, 195 1.25 fvdl NFSV2PROC_LINK, 196 1.25 fvdl NFSV2PROC_READDIR, 197 1.25 fvdl NFSV2PROC_NOOP, 198 1.25 fvdl NFSV2PROC_STATFS, 199 1.25 fvdl NFSV2PROC_NOOP, 200 1.25 fvdl NFSV2PROC_NOOP, 201 1.25 fvdl NFSV2PROC_NOOP, 202 1.25 fvdl NFSV2PROC_NOOP, 203 1.25 fvdl }; 204 1.25 fvdl 205 1.25 fvdl /* 206 1.25 fvdl * Maps errno values to nfs error numbers. 207 1.25 fvdl * Use NFSERR_IO as the catch all for ones not specifically defined in 208 1.25 fvdl * RFC 1094. 209 1.25 fvdl */ 210 1.90 jdolecek static const u_char nfsrv_v2errmap[ELAST] = { 211 1.25 fvdl NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 212 1.25 fvdl NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 213 1.25 fvdl NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 214 1.25 fvdl NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 215 1.25 fvdl NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 216 1.25 fvdl NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 217 1.25 fvdl NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 218 1.25 fvdl NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 219 1.25 fvdl NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 220 1.25 fvdl NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 221 1.25 fvdl NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 222 1.25 fvdl NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 223 1.25 fvdl NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 224 1.25 fvdl NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 225 1.25 fvdl NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 226 1.25 fvdl NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 227 1.52 mikel NFSERR_IO, NFSERR_IO, 228 1.25 fvdl }; 229 1.25 fvdl 230 1.25 fvdl /* 231 1.25 fvdl * Maps errno values to nfs error numbers. 232 1.25 fvdl * Although it is not obvious whether or not NFS clients really care if 233 1.25 fvdl * a returned error value is in the specified list for the procedure, the 234 1.25 fvdl * safest thing to do is filter them appropriately. For Version 2, the 235 1.25 fvdl * X/Open XNFS document is the only specification that defines error values 236 1.25 fvdl * for each RPC (The RFC simply lists all possible error values for all RPCs), 237 1.25 fvdl * so I have decided to not do this for Version 2. 238 1.25 fvdl * The first entry is the default error return and the rest are the valid 239 1.25 fvdl * errors for that RPC in increasing numeric order. 240 1.25 fvdl */ 241 1.90 jdolecek static const short nfsv3err_null[] = { 242 1.25 fvdl 0, 243 1.25 fvdl 0, 244 1.25 fvdl }; 245 1.25 fvdl 246 1.90 jdolecek static const short nfsv3err_getattr[] = { 247 1.25 fvdl NFSERR_IO, 248 1.25 fvdl NFSERR_IO, 249 1.25 fvdl NFSERR_STALE, 250 1.25 fvdl NFSERR_BADHANDLE, 251 1.25 fvdl NFSERR_SERVERFAULT, 252 1.25 fvdl 0, 253 1.25 fvdl }; 254 1.25 fvdl 255 1.90 jdolecek static const short nfsv3err_setattr[] = { 256 1.25 fvdl NFSERR_IO, 257 1.25 fvdl NFSERR_PERM, 258 1.25 fvdl NFSERR_IO, 259 1.25 fvdl NFSERR_ACCES, 260 1.25 fvdl NFSERR_INVAL, 261 1.25 fvdl NFSERR_NOSPC, 262 1.25 fvdl NFSERR_ROFS, 263 1.25 fvdl NFSERR_DQUOT, 264 1.25 fvdl NFSERR_STALE, 265 1.25 fvdl NFSERR_BADHANDLE, 266 1.25 fvdl NFSERR_NOT_SYNC, 267 1.25 fvdl NFSERR_SERVERFAULT, 268 1.25 fvdl 0, 269 1.25 fvdl }; 270 1.25 fvdl 271 1.90 jdolecek static const short nfsv3err_lookup[] = { 272 1.25 fvdl NFSERR_IO, 273 1.25 fvdl NFSERR_NOENT, 274 1.25 fvdl NFSERR_IO, 275 1.25 fvdl NFSERR_ACCES, 276 1.25 fvdl NFSERR_NOTDIR, 277 1.25 fvdl NFSERR_NAMETOL, 278 1.25 fvdl NFSERR_STALE, 279 1.25 fvdl NFSERR_BADHANDLE, 280 1.25 fvdl NFSERR_SERVERFAULT, 281 1.25 fvdl 0, 282 1.25 fvdl }; 283 1.25 fvdl 284 1.90 jdolecek static const short nfsv3err_access[] = { 285 1.25 fvdl NFSERR_IO, 286 1.25 fvdl NFSERR_IO, 287 1.25 fvdl NFSERR_STALE, 288 1.25 fvdl NFSERR_BADHANDLE, 289 1.25 fvdl NFSERR_SERVERFAULT, 290 1.25 fvdl 0, 291 1.25 fvdl }; 292 1.25 fvdl 293 1.90 jdolecek static const short nfsv3err_readlink[] = { 294 1.25 fvdl NFSERR_IO, 295 1.25 fvdl NFSERR_IO, 296 1.25 fvdl NFSERR_ACCES, 297 1.25 fvdl NFSERR_INVAL, 298 1.25 fvdl NFSERR_STALE, 299 1.25 fvdl NFSERR_BADHANDLE, 300 1.25 fvdl NFSERR_NOTSUPP, 301 1.25 fvdl NFSERR_SERVERFAULT, 302 1.25 fvdl 0, 303 1.25 fvdl }; 304 1.25 fvdl 305 1.90 jdolecek static const short nfsv3err_read[] = { 306 1.25 fvdl NFSERR_IO, 307 1.25 fvdl NFSERR_IO, 308 1.25 fvdl NFSERR_NXIO, 309 1.25 fvdl NFSERR_ACCES, 310 1.25 fvdl NFSERR_INVAL, 311 1.25 fvdl NFSERR_STALE, 312 1.25 fvdl NFSERR_BADHANDLE, 313 1.25 fvdl NFSERR_SERVERFAULT, 314 1.67 fvdl NFSERR_JUKEBOX, 315 1.25 fvdl 0, 316 1.25 fvdl }; 317 1.25 fvdl 318 1.90 jdolecek static const short nfsv3err_write[] = { 319 1.25 fvdl NFSERR_IO, 320 1.25 fvdl NFSERR_IO, 321 1.25 fvdl NFSERR_ACCES, 322 1.25 fvdl NFSERR_INVAL, 323 1.25 fvdl NFSERR_FBIG, 324 1.25 fvdl NFSERR_NOSPC, 325 1.25 fvdl NFSERR_ROFS, 326 1.25 fvdl NFSERR_DQUOT, 327 1.25 fvdl NFSERR_STALE, 328 1.25 fvdl NFSERR_BADHANDLE, 329 1.25 fvdl NFSERR_SERVERFAULT, 330 1.68 fvdl NFSERR_JUKEBOX, 331 1.25 fvdl 0, 332 1.25 fvdl }; 333 1.25 fvdl 334 1.90 jdolecek static const short nfsv3err_create[] = { 335 1.25 fvdl NFSERR_IO, 336 1.25 fvdl NFSERR_IO, 337 1.25 fvdl NFSERR_ACCES, 338 1.25 fvdl NFSERR_EXIST, 339 1.25 fvdl NFSERR_NOTDIR, 340 1.25 fvdl NFSERR_NOSPC, 341 1.25 fvdl NFSERR_ROFS, 342 1.25 fvdl NFSERR_NAMETOL, 343 1.25 fvdl NFSERR_DQUOT, 344 1.25 fvdl NFSERR_STALE, 345 1.25 fvdl NFSERR_BADHANDLE, 346 1.25 fvdl NFSERR_NOTSUPP, 347 1.25 fvdl NFSERR_SERVERFAULT, 348 1.25 fvdl 0, 349 1.25 fvdl }; 350 1.25 fvdl 351 1.90 jdolecek static const short nfsv3err_mkdir[] = { 352 1.25 fvdl NFSERR_IO, 353 1.25 fvdl NFSERR_IO, 354 1.25 fvdl NFSERR_ACCES, 355 1.25 fvdl NFSERR_EXIST, 356 1.25 fvdl NFSERR_NOTDIR, 357 1.25 fvdl NFSERR_NOSPC, 358 1.25 fvdl NFSERR_ROFS, 359 1.25 fvdl NFSERR_NAMETOL, 360 1.25 fvdl NFSERR_DQUOT, 361 1.25 fvdl NFSERR_STALE, 362 1.25 fvdl NFSERR_BADHANDLE, 363 1.25 fvdl NFSERR_NOTSUPP, 364 1.25 fvdl NFSERR_SERVERFAULT, 365 1.25 fvdl 0, 366 1.25 fvdl }; 367 1.25 fvdl 368 1.90 jdolecek static const short nfsv3err_symlink[] = { 369 1.25 fvdl NFSERR_IO, 370 1.25 fvdl NFSERR_IO, 371 1.25 fvdl NFSERR_ACCES, 372 1.25 fvdl NFSERR_EXIST, 373 1.25 fvdl NFSERR_NOTDIR, 374 1.25 fvdl NFSERR_NOSPC, 375 1.25 fvdl NFSERR_ROFS, 376 1.25 fvdl NFSERR_NAMETOL, 377 1.25 fvdl NFSERR_DQUOT, 378 1.25 fvdl NFSERR_STALE, 379 1.25 fvdl NFSERR_BADHANDLE, 380 1.25 fvdl NFSERR_NOTSUPP, 381 1.25 fvdl NFSERR_SERVERFAULT, 382 1.25 fvdl 0, 383 1.25 fvdl }; 384 1.25 fvdl 385 1.90 jdolecek static const short nfsv3err_mknod[] = { 386 1.25 fvdl NFSERR_IO, 387 1.25 fvdl NFSERR_IO, 388 1.25 fvdl NFSERR_ACCES, 389 1.25 fvdl NFSERR_EXIST, 390 1.25 fvdl NFSERR_NOTDIR, 391 1.25 fvdl NFSERR_NOSPC, 392 1.25 fvdl NFSERR_ROFS, 393 1.25 fvdl NFSERR_NAMETOL, 394 1.25 fvdl NFSERR_DQUOT, 395 1.25 fvdl NFSERR_STALE, 396 1.25 fvdl NFSERR_BADHANDLE, 397 1.25 fvdl NFSERR_NOTSUPP, 398 1.25 fvdl NFSERR_SERVERFAULT, 399 1.25 fvdl NFSERR_BADTYPE, 400 1.25 fvdl 0, 401 1.25 fvdl }; 402 1.25 fvdl 403 1.90 jdolecek static const short nfsv3err_remove[] = { 404 1.25 fvdl NFSERR_IO, 405 1.25 fvdl NFSERR_NOENT, 406 1.25 fvdl NFSERR_IO, 407 1.25 fvdl NFSERR_ACCES, 408 1.25 fvdl NFSERR_NOTDIR, 409 1.25 fvdl NFSERR_ROFS, 410 1.25 fvdl NFSERR_NAMETOL, 411 1.25 fvdl NFSERR_STALE, 412 1.25 fvdl NFSERR_BADHANDLE, 413 1.25 fvdl NFSERR_SERVERFAULT, 414 1.25 fvdl 0, 415 1.25 fvdl }; 416 1.25 fvdl 417 1.90 jdolecek static const short nfsv3err_rmdir[] = { 418 1.25 fvdl NFSERR_IO, 419 1.25 fvdl NFSERR_NOENT, 420 1.25 fvdl NFSERR_IO, 421 1.25 fvdl NFSERR_ACCES, 422 1.25 fvdl NFSERR_EXIST, 423 1.25 fvdl NFSERR_NOTDIR, 424 1.25 fvdl NFSERR_INVAL, 425 1.25 fvdl NFSERR_ROFS, 426 1.25 fvdl NFSERR_NAMETOL, 427 1.25 fvdl NFSERR_NOTEMPTY, 428 1.25 fvdl NFSERR_STALE, 429 1.25 fvdl NFSERR_BADHANDLE, 430 1.25 fvdl NFSERR_NOTSUPP, 431 1.25 fvdl NFSERR_SERVERFAULT, 432 1.25 fvdl 0, 433 1.25 fvdl }; 434 1.25 fvdl 435 1.90 jdolecek static const short nfsv3err_rename[] = { 436 1.25 fvdl NFSERR_IO, 437 1.25 fvdl NFSERR_NOENT, 438 1.25 fvdl NFSERR_IO, 439 1.25 fvdl NFSERR_ACCES, 440 1.25 fvdl NFSERR_EXIST, 441 1.25 fvdl NFSERR_XDEV, 442 1.25 fvdl NFSERR_NOTDIR, 443 1.25 fvdl NFSERR_ISDIR, 444 1.25 fvdl NFSERR_INVAL, 445 1.25 fvdl NFSERR_NOSPC, 446 1.25 fvdl NFSERR_ROFS, 447 1.25 fvdl NFSERR_MLINK, 448 1.25 fvdl NFSERR_NAMETOL, 449 1.25 fvdl NFSERR_NOTEMPTY, 450 1.25 fvdl NFSERR_DQUOT, 451 1.25 fvdl NFSERR_STALE, 452 1.25 fvdl NFSERR_BADHANDLE, 453 1.25 fvdl NFSERR_NOTSUPP, 454 1.25 fvdl NFSERR_SERVERFAULT, 455 1.25 fvdl 0, 456 1.25 fvdl }; 457 1.25 fvdl 458 1.90 jdolecek static const short nfsv3err_link[] = { 459 1.25 fvdl NFSERR_IO, 460 1.25 fvdl NFSERR_IO, 461 1.25 fvdl NFSERR_ACCES, 462 1.25 fvdl NFSERR_EXIST, 463 1.25 fvdl NFSERR_XDEV, 464 1.25 fvdl NFSERR_NOTDIR, 465 1.25 fvdl NFSERR_INVAL, 466 1.25 fvdl NFSERR_NOSPC, 467 1.25 fvdl NFSERR_ROFS, 468 1.25 fvdl NFSERR_MLINK, 469 1.25 fvdl NFSERR_NAMETOL, 470 1.25 fvdl NFSERR_DQUOT, 471 1.25 fvdl NFSERR_STALE, 472 1.25 fvdl NFSERR_BADHANDLE, 473 1.25 fvdl NFSERR_NOTSUPP, 474 1.25 fvdl NFSERR_SERVERFAULT, 475 1.25 fvdl 0, 476 1.25 fvdl }; 477 1.25 fvdl 478 1.90 jdolecek static const short nfsv3err_readdir[] = { 479 1.25 fvdl NFSERR_IO, 480 1.25 fvdl NFSERR_IO, 481 1.25 fvdl NFSERR_ACCES, 482 1.25 fvdl NFSERR_NOTDIR, 483 1.25 fvdl NFSERR_STALE, 484 1.25 fvdl NFSERR_BADHANDLE, 485 1.25 fvdl NFSERR_BAD_COOKIE, 486 1.25 fvdl NFSERR_TOOSMALL, 487 1.25 fvdl NFSERR_SERVERFAULT, 488 1.25 fvdl 0, 489 1.25 fvdl }; 490 1.25 fvdl 491 1.90 jdolecek static const short nfsv3err_readdirplus[] = { 492 1.25 fvdl NFSERR_IO, 493 1.25 fvdl NFSERR_IO, 494 1.25 fvdl NFSERR_ACCES, 495 1.25 fvdl NFSERR_NOTDIR, 496 1.25 fvdl NFSERR_STALE, 497 1.25 fvdl NFSERR_BADHANDLE, 498 1.25 fvdl NFSERR_BAD_COOKIE, 499 1.25 fvdl NFSERR_NOTSUPP, 500 1.25 fvdl NFSERR_TOOSMALL, 501 1.25 fvdl NFSERR_SERVERFAULT, 502 1.25 fvdl 0, 503 1.25 fvdl }; 504 1.25 fvdl 505 1.90 jdolecek static const short nfsv3err_fsstat[] = { 506 1.25 fvdl NFSERR_IO, 507 1.25 fvdl NFSERR_IO, 508 1.25 fvdl NFSERR_STALE, 509 1.25 fvdl NFSERR_BADHANDLE, 510 1.25 fvdl NFSERR_SERVERFAULT, 511 1.25 fvdl 0, 512 1.25 fvdl }; 513 1.25 fvdl 514 1.90 jdolecek static const short nfsv3err_fsinfo[] = { 515 1.25 fvdl NFSERR_STALE, 516 1.25 fvdl NFSERR_STALE, 517 1.25 fvdl NFSERR_BADHANDLE, 518 1.25 fvdl NFSERR_SERVERFAULT, 519 1.25 fvdl 0, 520 1.25 fvdl }; 521 1.25 fvdl 522 1.90 jdolecek static const short nfsv3err_pathconf[] = { 523 1.25 fvdl NFSERR_STALE, 524 1.25 fvdl NFSERR_STALE, 525 1.25 fvdl NFSERR_BADHANDLE, 526 1.25 fvdl NFSERR_SERVERFAULT, 527 1.25 fvdl 0, 528 1.25 fvdl }; 529 1.25 fvdl 530 1.90 jdolecek static const short nfsv3err_commit[] = { 531 1.25 fvdl NFSERR_IO, 532 1.25 fvdl NFSERR_IO, 533 1.25 fvdl NFSERR_STALE, 534 1.25 fvdl NFSERR_BADHANDLE, 535 1.25 fvdl NFSERR_SERVERFAULT, 536 1.25 fvdl 0, 537 1.25 fvdl }; 538 1.25 fvdl 539 1.90 jdolecek static const short * const nfsrv_v3errmap[] = { 540 1.25 fvdl nfsv3err_null, 541 1.25 fvdl nfsv3err_getattr, 542 1.25 fvdl nfsv3err_setattr, 543 1.25 fvdl nfsv3err_lookup, 544 1.25 fvdl nfsv3err_access, 545 1.25 fvdl nfsv3err_readlink, 546 1.25 fvdl nfsv3err_read, 547 1.25 fvdl nfsv3err_write, 548 1.25 fvdl nfsv3err_create, 549 1.25 fvdl nfsv3err_mkdir, 550 1.25 fvdl nfsv3err_symlink, 551 1.25 fvdl nfsv3err_mknod, 552 1.25 fvdl nfsv3err_remove, 553 1.25 fvdl nfsv3err_rmdir, 554 1.25 fvdl nfsv3err_rename, 555 1.25 fvdl nfsv3err_link, 556 1.25 fvdl nfsv3err_readdir, 557 1.25 fvdl nfsv3err_readdirplus, 558 1.25 fvdl nfsv3err_fsstat, 559 1.25 fvdl nfsv3err_fsinfo, 560 1.25 fvdl nfsv3err_pathconf, 561 1.25 fvdl nfsv3err_commit, 562 1.25 fvdl }; 563 1.25 fvdl 564 1.12 mycroft extern struct nfsrtt nfsrtt; 565 1.1 cgd 566 1.46 fvdl u_long nfsdirhashmask; 567 1.18 mycroft 568 1.213 dsl int nfs_webnamei(struct nameidata *, struct vnode *, struct proc *); 569 1.43 fvdl 570 1.1 cgd /* 571 1.1 cgd * Create the header for an rpc request packet 572 1.1 cgd * The hsiz is the size of the rest of the nfs request header. 573 1.1 cgd * (just used to decide if a cluster is a good idea) 574 1.1 cgd */ 575 1.12 mycroft struct mbuf * 576 1.183 christos nfsm_reqh(struct nfsnode *np, u_long procid, int hsiz, char **bposp) 577 1.12 mycroft { 578 1.75 augustss struct mbuf *mb; 579 1.183 christos char *bpos; 580 1.12 mycroft 581 1.109 matt mb = m_get(M_WAIT, MT_DATA); 582 1.109 matt MCLAIM(mb, &nfs_mowner); 583 1.12 mycroft if (hsiz >= MINCLSIZE) 584 1.109 matt m_clget(mb, M_WAIT); 585 1.12 mycroft mb->m_len = 0; 586 1.183 christos bpos = mtod(mb, void *); 587 1.148 perry 588 1.12 mycroft /* Finally, return values */ 589 1.12 mycroft *bposp = bpos; 590 1.12 mycroft return (mb); 591 1.12 mycroft } 592 1.12 mycroft 593 1.12 mycroft /* 594 1.12 mycroft * Build the RPC header and fill in the authorization info. 595 1.12 mycroft * The authorization string argument is only used when the credentials 596 1.12 mycroft * come from outside of the kernel. 597 1.12 mycroft * Returns the head of the mbuf list. 598 1.12 mycroft */ 599 1.12 mycroft struct mbuf * 600 1.216 cegger nfsm_rpchead(kauth_cred_t cr, int nmflag, int procid, 601 1.216 cegger int auth_type, int auth_len, char *auth_str, int verf_len, 602 1.216 cegger char *verf_str, struct mbuf *mrest, int mrest_len, 603 1.216 cegger struct mbuf **mbp, uint32_t *xidp) 604 1.1 cgd { 605 1.75 augustss struct mbuf *mb; 606 1.75 augustss u_int32_t *tl; 607 1.183 christos char *bpos; 608 1.75 augustss int i; 609 1.109 matt struct mbuf *mreq; 610 1.12 mycroft int siz, grpsiz, authsiz; 611 1.1 cgd 612 1.12 mycroft authsiz = nfsm_rndup(auth_len); 613 1.109 matt mb = m_gethdr(M_WAIT, MT_DATA); 614 1.109 matt MCLAIM(mb, &nfs_mowner); 615 1.25 fvdl if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 616 1.109 matt m_clget(mb, M_WAIT); 617 1.25 fvdl } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 618 1.25 fvdl MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 619 1.12 mycroft } else { 620 1.25 fvdl MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 621 1.1 cgd } 622 1.12 mycroft mb->m_len = 0; 623 1.12 mycroft mreq = mb; 624 1.183 christos bpos = mtod(mb, void *); 625 1.12 mycroft 626 1.12 mycroft /* 627 1.12 mycroft * First the RPC header. 628 1.12 mycroft */ 629 1.25 fvdl nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 630 1.30 fvdl 631 1.126 yamt *tl++ = *xidp = nfs_getxid(); 632 1.1 cgd *tl++ = rpc_call; 633 1.1 cgd *tl++ = rpc_vers; 634 1.179 yamt *tl++ = txdr_unsigned(NFS_PROG); 635 1.179 yamt if (nmflag & NFSMNT_NFSV3) 636 1.179 yamt *tl++ = txdr_unsigned(NFS_VER3); 637 1.179 yamt else 638 1.179 yamt *tl++ = txdr_unsigned(NFS_VER2); 639 1.25 fvdl if (nmflag & NFSMNT_NFSV3) 640 1.25 fvdl *tl++ = txdr_unsigned(procid); 641 1.25 fvdl else 642 1.25 fvdl *tl++ = txdr_unsigned(nfsv2_procid[procid]); 643 1.12 mycroft 644 1.12 mycroft /* 645 1.12 mycroft * And then the authorization cred. 646 1.12 mycroft */ 647 1.12 mycroft *tl++ = txdr_unsigned(auth_type); 648 1.12 mycroft *tl = txdr_unsigned(authsiz); 649 1.12 mycroft switch (auth_type) { 650 1.12 mycroft case RPCAUTH_UNIX: 651 1.22 cgd nfsm_build(tl, u_int32_t *, auth_len); 652 1.12 mycroft *tl++ = 0; /* stamp ?? */ 653 1.12 mycroft *tl++ = 0; /* NULL hostname */ 654 1.162 elad *tl++ = txdr_unsigned(kauth_cred_geteuid(cr)); 655 1.162 elad *tl++ = txdr_unsigned(kauth_cred_getegid(cr)); 656 1.12 mycroft grpsiz = (auth_len >> 2) - 5; 657 1.12 mycroft *tl++ = txdr_unsigned(grpsiz); 658 1.20 mycroft for (i = 0; i < grpsiz; i++) 659 1.162 elad *tl++ = txdr_unsigned(kauth_cred_group(cr, i)); /* XXX elad review */ 660 1.12 mycroft break; 661 1.25 fvdl case RPCAUTH_KERB4: 662 1.12 mycroft siz = auth_len; 663 1.12 mycroft while (siz > 0) { 664 1.12 mycroft if (M_TRAILINGSPACE(mb) == 0) { 665 1.109 matt struct mbuf *mb2; 666 1.109 matt mb2 = m_get(M_WAIT, MT_DATA); 667 1.109 matt MCLAIM(mb2, &nfs_mowner); 668 1.12 mycroft if (siz >= MINCLSIZE) 669 1.109 matt m_clget(mb2, M_WAIT); 670 1.12 mycroft mb->m_next = mb2; 671 1.12 mycroft mb = mb2; 672 1.12 mycroft mb->m_len = 0; 673 1.183 christos bpos = mtod(mb, void *); 674 1.12 mycroft } 675 1.12 mycroft i = min(siz, M_TRAILINGSPACE(mb)); 676 1.63 perry memcpy(bpos, auth_str, i); 677 1.12 mycroft mb->m_len += i; 678 1.12 mycroft auth_str += i; 679 1.12 mycroft bpos += i; 680 1.12 mycroft siz -= i; 681 1.12 mycroft } 682 1.12 mycroft if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 683 1.12 mycroft for (i = 0; i < siz; i++) 684 1.12 mycroft *bpos++ = '\0'; 685 1.12 mycroft mb->m_len += siz; 686 1.12 mycroft } 687 1.12 mycroft break; 688 1.12 mycroft }; 689 1.25 fvdl 690 1.25 fvdl /* 691 1.25 fvdl * And the verifier... 692 1.25 fvdl */ 693 1.25 fvdl nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 694 1.25 fvdl if (verf_str) { 695 1.25 fvdl *tl++ = txdr_unsigned(RPCAUTH_KERB4); 696 1.25 fvdl *tl = txdr_unsigned(verf_len); 697 1.25 fvdl siz = verf_len; 698 1.25 fvdl while (siz > 0) { 699 1.25 fvdl if (M_TRAILINGSPACE(mb) == 0) { 700 1.109 matt struct mbuf *mb2; 701 1.109 matt mb2 = m_get(M_WAIT, MT_DATA); 702 1.109 matt MCLAIM(mb2, &nfs_mowner); 703 1.25 fvdl if (siz >= MINCLSIZE) 704 1.109 matt m_clget(mb2, M_WAIT); 705 1.25 fvdl mb->m_next = mb2; 706 1.25 fvdl mb = mb2; 707 1.25 fvdl mb->m_len = 0; 708 1.183 christos bpos = mtod(mb, void *); 709 1.25 fvdl } 710 1.25 fvdl i = min(siz, M_TRAILINGSPACE(mb)); 711 1.63 perry memcpy(bpos, verf_str, i); 712 1.25 fvdl mb->m_len += i; 713 1.25 fvdl verf_str += i; 714 1.25 fvdl bpos += i; 715 1.25 fvdl siz -= i; 716 1.25 fvdl } 717 1.25 fvdl if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 718 1.25 fvdl for (i = 0; i < siz; i++) 719 1.25 fvdl *bpos++ = '\0'; 720 1.25 fvdl mb->m_len += siz; 721 1.25 fvdl } 722 1.25 fvdl } else { 723 1.25 fvdl *tl++ = txdr_unsigned(RPCAUTH_NULL); 724 1.25 fvdl *tl = 0; 725 1.25 fvdl } 726 1.12 mycroft mb->m_next = mrest; 727 1.25 fvdl mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 728 1.12 mycroft mreq->m_pkthdr.rcvif = (struct ifnet *)0; 729 1.12 mycroft *mbp = mb; 730 1.1 cgd return (mreq); 731 1.1 cgd } 732 1.1 cgd 733 1.1 cgd /* 734 1.1 cgd * copies mbuf chain to the uio scatter/gather list 735 1.1 cgd */ 736 1.24 christos int 737 1.214 dsl nfsm_mbuftouio(struct mbuf **mrep, struct uio *uiop, int siz, char **dpos) 738 1.1 cgd { 739 1.75 augustss char *mbufcp, *uiocp; 740 1.75 augustss int xfer, left, len; 741 1.75 augustss struct mbuf *mp; 742 1.1 cgd long uiosiz, rem; 743 1.1 cgd int error = 0; 744 1.1 cgd 745 1.1 cgd mp = *mrep; 746 1.1 cgd mbufcp = *dpos; 747 1.183 christos len = mtod(mp, char *) + mp->m_len - mbufcp; 748 1.1 cgd rem = nfsm_rndup(siz)-siz; 749 1.1 cgd while (siz > 0) { 750 1.1 cgd if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 751 1.1 cgd return (EFBIG); 752 1.1 cgd left = uiop->uio_iov->iov_len; 753 1.1 cgd uiocp = uiop->uio_iov->iov_base; 754 1.1 cgd if (left > siz) 755 1.1 cgd left = siz; 756 1.1 cgd uiosiz = left; 757 1.1 cgd while (left > 0) { 758 1.1 cgd while (len == 0) { 759 1.1 cgd mp = mp->m_next; 760 1.1 cgd if (mp == NULL) 761 1.1 cgd return (EBADRPC); 762 1.183 christos mbufcp = mtod(mp, void *); 763 1.1 cgd len = mp->m_len; 764 1.1 cgd } 765 1.1 cgd xfer = (left > len) ? len : left; 766 1.158 yamt error = copyout_vmspace(uiop->uio_vmspace, mbufcp, 767 1.158 yamt uiocp, xfer); 768 1.158 yamt if (error) { 769 1.158 yamt return error; 770 1.158 yamt } 771 1.1 cgd left -= xfer; 772 1.1 cgd len -= xfer; 773 1.1 cgd mbufcp += xfer; 774 1.1 cgd uiocp += xfer; 775 1.1 cgd uiop->uio_offset += xfer; 776 1.1 cgd uiop->uio_resid -= xfer; 777 1.1 cgd } 778 1.1 cgd if (uiop->uio_iov->iov_len <= siz) { 779 1.1 cgd uiop->uio_iovcnt--; 780 1.1 cgd uiop->uio_iov++; 781 1.1 cgd } else { 782 1.95 lukem uiop->uio_iov->iov_base = 783 1.183 christos (char *)uiop->uio_iov->iov_base + uiosiz; 784 1.1 cgd uiop->uio_iov->iov_len -= uiosiz; 785 1.1 cgd } 786 1.1 cgd siz -= uiosiz; 787 1.1 cgd } 788 1.1 cgd *dpos = mbufcp; 789 1.1 cgd *mrep = mp; 790 1.1 cgd if (rem > 0) { 791 1.1 cgd if (len < rem) 792 1.1 cgd error = nfs_adv(mrep, dpos, rem, len); 793 1.1 cgd else 794 1.1 cgd *dpos += rem; 795 1.1 cgd } 796 1.1 cgd return (error); 797 1.1 cgd } 798 1.1 cgd 799 1.1 cgd /* 800 1.29 fvdl * copies a uio scatter/gather list to an mbuf chain. 801 1.29 fvdl * NOTE: can ony handle iovcnt == 1 802 1.1 cgd */ 803 1.24 christos int 804 1.214 dsl nfsm_uiotombuf(struct uio *uiop, struct mbuf **mq, int siz, char **bpos) 805 1.1 cgd { 806 1.75 augustss char *uiocp; 807 1.75 augustss struct mbuf *mp, *mp2; 808 1.75 augustss int xfer, left, mlen; 809 1.1 cgd int uiosiz, clflg, rem; 810 1.1 cgd char *cp; 811 1.158 yamt int error; 812 1.1 cgd 813 1.29 fvdl #ifdef DIAGNOSTIC 814 1.29 fvdl if (uiop->uio_iovcnt != 1) 815 1.29 fvdl panic("nfsm_uiotombuf: iovcnt != 1"); 816 1.29 fvdl #endif 817 1.29 fvdl 818 1.1 cgd if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 819 1.1 cgd clflg = 1; 820 1.1 cgd else 821 1.1 cgd clflg = 0; 822 1.1 cgd rem = nfsm_rndup(siz)-siz; 823 1.12 mycroft mp = mp2 = *mq; 824 1.1 cgd while (siz > 0) { 825 1.1 cgd left = uiop->uio_iov->iov_len; 826 1.1 cgd uiocp = uiop->uio_iov->iov_base; 827 1.1 cgd if (left > siz) 828 1.1 cgd left = siz; 829 1.1 cgd uiosiz = left; 830 1.1 cgd while (left > 0) { 831 1.12 mycroft mlen = M_TRAILINGSPACE(mp); 832 1.12 mycroft if (mlen == 0) { 833 1.109 matt mp = m_get(M_WAIT, MT_DATA); 834 1.109 matt MCLAIM(mp, &nfs_mowner); 835 1.12 mycroft if (clflg) 836 1.109 matt m_clget(mp, M_WAIT); 837 1.12 mycroft mp->m_len = 0; 838 1.12 mycroft mp2->m_next = mp; 839 1.12 mycroft mp2 = mp; 840 1.12 mycroft mlen = M_TRAILINGSPACE(mp); 841 1.12 mycroft } 842 1.12 mycroft xfer = (left > mlen) ? mlen : left; 843 1.183 christos cp = mtod(mp, char *) + mp->m_len; 844 1.158 yamt error = copyin_vmspace(uiop->uio_vmspace, uiocp, cp, 845 1.158 yamt xfer); 846 1.158 yamt if (error) { 847 1.158 yamt /* XXX */ 848 1.158 yamt } 849 1.12 mycroft mp->m_len += xfer; 850 1.1 cgd left -= xfer; 851 1.1 cgd uiocp += xfer; 852 1.1 cgd uiop->uio_offset += xfer; 853 1.1 cgd uiop->uio_resid -= xfer; 854 1.1 cgd } 855 1.183 christos uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + 856 1.95 lukem uiosiz; 857 1.29 fvdl uiop->uio_iov->iov_len -= uiosiz; 858 1.1 cgd siz -= uiosiz; 859 1.1 cgd } 860 1.1 cgd if (rem > 0) { 861 1.12 mycroft if (rem > M_TRAILINGSPACE(mp)) { 862 1.109 matt mp = m_get(M_WAIT, MT_DATA); 863 1.109 matt MCLAIM(mp, &nfs_mowner); 864 1.1 cgd mp->m_len = 0; 865 1.1 cgd mp2->m_next = mp; 866 1.1 cgd } 867 1.183 christos cp = mtod(mp, char *) + mp->m_len; 868 1.1 cgd for (left = 0; left < rem; left++) 869 1.1 cgd *cp++ = '\0'; 870 1.1 cgd mp->m_len += rem; 871 1.1 cgd *bpos = cp; 872 1.1 cgd } else 873 1.183 christos *bpos = mtod(mp, char *) + mp->m_len; 874 1.1 cgd *mq = mp; 875 1.1 cgd return (0); 876 1.1 cgd } 877 1.1 cgd 878 1.1 cgd /* 879 1.39 fvdl * Get at least "siz" bytes of correctly aligned data. 880 1.39 fvdl * When called the mbuf pointers are not necessarily correct, 881 1.39 fvdl * dsosp points to what ought to be in m_data and left contains 882 1.148 perry * what ought to be in m_len. 883 1.12 mycroft * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 884 1.1 cgd * cases. (The macros use the vars. dpos and dpos2) 885 1.1 cgd */ 886 1.24 christos int 887 1.214 dsl nfsm_disct(struct mbuf **mdp, char **dposp, int siz, int left, char **cp2) 888 1.1 cgd { 889 1.75 augustss struct mbuf *m1, *m2; 890 1.39 fvdl struct mbuf *havebuf = NULL; 891 1.183 christos char *src = *dposp; 892 1.183 christos char *dst; 893 1.39 fvdl int len; 894 1.39 fvdl 895 1.39 fvdl #ifdef DEBUG 896 1.39 fvdl if (left < 0) 897 1.148 perry panic("nfsm_disct: left < 0"); 898 1.39 fvdl #endif 899 1.39 fvdl m1 = *mdp; 900 1.39 fvdl /* 901 1.39 fvdl * Skip through the mbuf chain looking for an mbuf with 902 1.39 fvdl * some data. If the first mbuf found has enough data 903 1.39 fvdl * and it is correctly aligned return it. 904 1.39 fvdl */ 905 1.1 cgd while (left == 0) { 906 1.39 fvdl havebuf = m1; 907 1.39 fvdl *mdp = m1 = m1->m_next; 908 1.39 fvdl if (m1 == NULL) 909 1.1 cgd return (EBADRPC); 910 1.183 christos src = mtod(m1, void *); 911 1.39 fvdl left = m1->m_len; 912 1.39 fvdl /* 913 1.39 fvdl * If we start a new mbuf and it is big enough 914 1.39 fvdl * and correctly aligned just return it, don't 915 1.39 fvdl * do any pull up. 916 1.39 fvdl */ 917 1.39 fvdl if (left >= siz && nfsm_aligned(src)) { 918 1.39 fvdl *cp2 = src; 919 1.39 fvdl *dposp = src + siz; 920 1.39 fvdl return (0); 921 1.39 fvdl } 922 1.1 cgd } 923 1.201 yamt if ((m1->m_flags & M_EXT) != 0) { 924 1.201 yamt if (havebuf && M_TRAILINGSPACE(havebuf) >= siz && 925 1.201 yamt nfsm_aligned(mtod(havebuf, char *) + havebuf->m_len)) { 926 1.201 yamt /* 927 1.201 yamt * If the first mbuf with data has external data 928 1.201 yamt * and there is a previous mbuf with some trailing 929 1.201 yamt * space, use it to move the data into. 930 1.39 fvdl */ 931 1.39 fvdl m2 = m1; 932 1.39 fvdl *mdp = m1 = havebuf; 933 1.201 yamt *cp2 = mtod(m1, char *) + m1->m_len; 934 1.201 yamt } else if (havebuf) { 935 1.39 fvdl /* 936 1.39 fvdl * If the first mbuf has a external data 937 1.39 fvdl * and there is no previous empty mbuf 938 1.39 fvdl * allocate a new mbuf and move the external 939 1.148 perry * data to the new mbuf. Also make the first 940 1.39 fvdl * mbuf look empty. 941 1.39 fvdl */ 942 1.201 yamt m2 = m1; 943 1.201 yamt *mdp = m1 = m_get(M_WAIT, MT_DATA); 944 1.201 yamt MCLAIM(m1, m2->m_owner); 945 1.201 yamt if ((m2->m_flags & M_PKTHDR) != 0) { 946 1.201 yamt /* XXX MOVE */ 947 1.201 yamt M_COPY_PKTHDR(m1, m2); 948 1.201 yamt m_tag_delete_chain(m2, NULL); 949 1.201 yamt m2->m_flags &= ~M_PKTHDR; 950 1.201 yamt } 951 1.201 yamt if (havebuf) { 952 1.201 yamt havebuf->m_next = m1; 953 1.201 yamt } 954 1.201 yamt m1->m_next = m2; 955 1.201 yamt MRESETDATA(m1); 956 1.201 yamt m1->m_len = 0; 957 1.39 fvdl m2->m_data = src; 958 1.39 fvdl m2->m_len = left; 959 1.201 yamt *cp2 = mtod(m1, char *); 960 1.201 yamt } else { 961 1.201 yamt struct mbuf **nextp = &m1->m_next; 962 1.201 yamt 963 1.201 yamt m1->m_len -= left; 964 1.201 yamt do { 965 1.201 yamt m2 = m_get(M_WAIT, MT_DATA); 966 1.201 yamt MCLAIM(m2, m1->m_owner); 967 1.201 yamt if (left >= MINCLSIZE) { 968 1.201 yamt MCLGET(m2, M_WAIT); 969 1.201 yamt } 970 1.201 yamt m2->m_next = *nextp; 971 1.201 yamt *nextp = m2; 972 1.201 yamt nextp = &m2->m_next; 973 1.201 yamt len = (m2->m_flags & M_EXT) != 0 ? 974 1.201 yamt MCLBYTES : MLEN; 975 1.201 yamt if (len > left) { 976 1.201 yamt len = left; 977 1.201 yamt } 978 1.201 yamt memcpy(mtod(m2, char *), src, len); 979 1.201 yamt m2->m_len = len; 980 1.201 yamt src += len; 981 1.201 yamt left -= len; 982 1.201 yamt } while (left > 0); 983 1.201 yamt *mdp = m1 = m1->m_next; 984 1.201 yamt m2 = m1->m_next; 985 1.201 yamt *cp2 = mtod(m1, char *); 986 1.1 cgd } 987 1.39 fvdl } else { 988 1.39 fvdl /* 989 1.39 fvdl * If the first mbuf has no external data 990 1.39 fvdl * move the data to the front of the mbuf. 991 1.39 fvdl */ 992 1.201 yamt MRESETDATA(m1); 993 1.201 yamt dst = mtod(m1, char *); 994 1.201 yamt if (dst != src) { 995 1.63 perry memmove(dst, src, left); 996 1.201 yamt } 997 1.39 fvdl m1->m_len = left; 998 1.39 fvdl m2 = m1->m_next; 999 1.201 yamt *cp2 = m1->m_data; 1000 1.1 cgd } 1001 1.201 yamt *dposp = *cp2 + siz; 1002 1.39 fvdl /* 1003 1.39 fvdl * Loop through mbufs pulling data up into first mbuf until 1004 1.39 fvdl * the first mbuf is full or there is no more data to 1005 1.39 fvdl * pullup. 1006 1.39 fvdl */ 1007 1.201 yamt dst = mtod(m1, char *) + m1->m_len; 1008 1.129 itojun while ((len = M_TRAILINGSPACE(m1)) != 0 && m2) { 1009 1.201 yamt if ((len = min(len, m2->m_len)) != 0) { 1010 1.201 yamt memcpy(dst, mtod(m2, char *), len); 1011 1.201 yamt } 1012 1.39 fvdl m1->m_len += len; 1013 1.39 fvdl dst += len; 1014 1.39 fvdl m2->m_data += len; 1015 1.39 fvdl m2->m_len -= len; 1016 1.39 fvdl m2 = m2->m_next; 1017 1.39 fvdl } 1018 1.39 fvdl if (m1->m_len < siz) 1019 1.39 fvdl return (EBADRPC); 1020 1.1 cgd return (0); 1021 1.1 cgd } 1022 1.1 cgd 1023 1.1 cgd /* 1024 1.1 cgd * Advance the position in the mbuf chain. 1025 1.1 cgd */ 1026 1.24 christos int 1027 1.214 dsl nfs_adv(struct mbuf **mdp, char **dposp, int offs, int left) 1028 1.1 cgd { 1029 1.75 augustss struct mbuf *m; 1030 1.75 augustss int s; 1031 1.1 cgd 1032 1.1 cgd m = *mdp; 1033 1.1 cgd s = left; 1034 1.1 cgd while (s < offs) { 1035 1.1 cgd offs -= s; 1036 1.1 cgd m = m->m_next; 1037 1.1 cgd if (m == NULL) 1038 1.1 cgd return (EBADRPC); 1039 1.1 cgd s = m->m_len; 1040 1.1 cgd } 1041 1.1 cgd *mdp = m; 1042 1.183 christos *dposp = mtod(m, char *) + offs; 1043 1.1 cgd return (0); 1044 1.1 cgd } 1045 1.1 cgd 1046 1.1 cgd /* 1047 1.1 cgd * Copy a string into mbufs for the hard cases... 1048 1.1 cgd */ 1049 1.24 christos int 1050 1.214 dsl nfsm_strtmbuf(struct mbuf **mb, char **bpos, const char *cp, long siz) 1051 1.1 cgd { 1052 1.75 augustss struct mbuf *m1 = NULL, *m2; 1053 1.1 cgd long left, xfer, len, tlen; 1054 1.22 cgd u_int32_t *tl; 1055 1.1 cgd int putsize; 1056 1.1 cgd 1057 1.1 cgd putsize = 1; 1058 1.1 cgd m2 = *mb; 1059 1.12 mycroft left = M_TRAILINGSPACE(m2); 1060 1.1 cgd if (left > 0) { 1061 1.22 cgd tl = ((u_int32_t *)(*bpos)); 1062 1.1 cgd *tl++ = txdr_unsigned(siz); 1063 1.1 cgd putsize = 0; 1064 1.1 cgd left -= NFSX_UNSIGNED; 1065 1.1 cgd m2->m_len += NFSX_UNSIGNED; 1066 1.1 cgd if (left > 0) { 1067 1.183 christos memcpy((void *) tl, cp, left); 1068 1.1 cgd siz -= left; 1069 1.1 cgd cp += left; 1070 1.1 cgd m2->m_len += left; 1071 1.1 cgd left = 0; 1072 1.1 cgd } 1073 1.1 cgd } 1074 1.12 mycroft /* Loop around adding mbufs */ 1075 1.1 cgd while (siz > 0) { 1076 1.109 matt m1 = m_get(M_WAIT, MT_DATA); 1077 1.109 matt MCLAIM(m1, &nfs_mowner); 1078 1.1 cgd if (siz > MLEN) 1079 1.109 matt m_clget(m1, M_WAIT); 1080 1.1 cgd m1->m_len = NFSMSIZ(m1); 1081 1.1 cgd m2->m_next = m1; 1082 1.1 cgd m2 = m1; 1083 1.22 cgd tl = mtod(m1, u_int32_t *); 1084 1.1 cgd tlen = 0; 1085 1.1 cgd if (putsize) { 1086 1.1 cgd *tl++ = txdr_unsigned(siz); 1087 1.1 cgd m1->m_len -= NFSX_UNSIGNED; 1088 1.1 cgd tlen = NFSX_UNSIGNED; 1089 1.1 cgd putsize = 0; 1090 1.1 cgd } 1091 1.1 cgd if (siz < m1->m_len) { 1092 1.1 cgd len = nfsm_rndup(siz); 1093 1.1 cgd xfer = siz; 1094 1.1 cgd if (xfer < len) 1095 1.1 cgd *(tl+(xfer>>2)) = 0; 1096 1.1 cgd } else { 1097 1.1 cgd xfer = len = m1->m_len; 1098 1.1 cgd } 1099 1.183 christos memcpy((void *) tl, cp, xfer); 1100 1.1 cgd m1->m_len = len+tlen; 1101 1.1 cgd siz -= xfer; 1102 1.1 cgd cp += xfer; 1103 1.1 cgd } 1104 1.1 cgd *mb = m1; 1105 1.183 christos *bpos = mtod(m1, char *) + m1->m_len; 1106 1.1 cgd return (0); 1107 1.1 cgd } 1108 1.1 cgd 1109 1.49 fvdl /* 1110 1.49 fvdl * Directory caching routines. They work as follows: 1111 1.49 fvdl * - a cache is maintained per VDIR nfsnode. 1112 1.49 fvdl * - for each offset cookie that is exported to userspace, and can 1113 1.49 fvdl * thus be thrown back at us as an offset to VOP_READDIR, store 1114 1.49 fvdl * information in the cache. 1115 1.49 fvdl * - cached are: 1116 1.49 fvdl * - cookie itself 1117 1.49 fvdl * - blocknumber (essentially just a search key in the buffer cache) 1118 1.49 fvdl * - entry number in block. 1119 1.49 fvdl * - offset cookie of block in which this entry is stored 1120 1.49 fvdl * - 32 bit cookie if NFSMNT_XLATECOOKIE is used. 1121 1.49 fvdl * - entries are looked up in a hash table 1122 1.49 fvdl * - also maintained is an LRU list of entries, used to determine 1123 1.49 fvdl * which ones to delete if the cache grows too large. 1124 1.49 fvdl * - if 32 <-> 64 translation mode is requested for a filesystem, 1125 1.49 fvdl * the cache also functions as a translation table 1126 1.49 fvdl * - in the translation case, invalidating the cache does not mean 1127 1.49 fvdl * flushing it, but just marking entries as invalid, except for 1128 1.49 fvdl * the <64bit cookie, 32bitcookie> pair which is still valid, to 1129 1.49 fvdl * still be able to use the cache as a translation table. 1130 1.49 fvdl * - 32 bit cookies are uniquely created by combining the hash table 1131 1.49 fvdl * entry value, and one generation count per hash table entry, 1132 1.49 fvdl * incremented each time an entry is appended to the chain. 1133 1.49 fvdl * - the cache is invalidated each time a direcory is modified 1134 1.49 fvdl * - sanity checks are also done; if an entry in a block turns 1135 1.49 fvdl * out not to have a matching cookie, the cache is invalidated 1136 1.49 fvdl * and a new block starting from the wanted offset is fetched from 1137 1.49 fvdl * the server. 1138 1.49 fvdl * - directory entries as read from the server are extended to contain 1139 1.49 fvdl * the 64bit and, optionally, the 32bit cookies, for sanity checking 1140 1.49 fvdl * the cache and exporting them to userspace through the cookie 1141 1.49 fvdl * argument to VOP_READDIR. 1142 1.49 fvdl */ 1143 1.49 fvdl 1144 1.46 fvdl u_long 1145 1.214 dsl nfs_dirhash(off_t off) 1146 1.46 fvdl { 1147 1.46 fvdl int i; 1148 1.46 fvdl char *cp = (char *)&off; 1149 1.46 fvdl u_long sum = 0L; 1150 1.46 fvdl 1151 1.46 fvdl for (i = 0 ; i < sizeof (off); i++) 1152 1.46 fvdl sum += *cp++; 1153 1.46 fvdl 1154 1.46 fvdl return sum; 1155 1.46 fvdl } 1156 1.46 fvdl 1157 1.221 rmind #define _NFSDC_MTX(np) (NFSTOV(np)->v_interlock) 1158 1.195 ad #define NFSDC_LOCK(np) mutex_enter(_NFSDC_MTX(np)) 1159 1.195 ad #define NFSDC_UNLOCK(np) mutex_exit(_NFSDC_MTX(np)) 1160 1.195 ad #define NFSDC_ASSERT_LOCKED(np) KASSERT(mutex_owned(_NFSDC_MTX(np))) 1161 1.135 yamt 1162 1.49 fvdl void 1163 1.214 dsl nfs_initdircache(struct vnode *vp) 1164 1.49 fvdl { 1165 1.49 fvdl struct nfsnode *np = VTONFS(vp); 1166 1.135 yamt struct nfsdirhashhead *dircache; 1167 1.120 yamt 1168 1.202 ad dircache = hashinit(NFS_DIRHASHSIZ, HASH_LIST, true, 1169 1.202 ad &nfsdirhashmask); 1170 1.49 fvdl 1171 1.135 yamt NFSDC_LOCK(np); 1172 1.135 yamt if (np->n_dircache == NULL) { 1173 1.135 yamt np->n_dircachesize = 0; 1174 1.135 yamt np->n_dircache = dircache; 1175 1.135 yamt dircache = NULL; 1176 1.135 yamt TAILQ_INIT(&np->n_dirchain); 1177 1.135 yamt } 1178 1.135 yamt NFSDC_UNLOCK(np); 1179 1.135 yamt if (dircache) 1180 1.202 ad hashdone(dircache, HASH_LIST, nfsdirhashmask); 1181 1.120 yamt } 1182 1.120 yamt 1183 1.120 yamt void 1184 1.214 dsl nfs_initdirxlatecookie(struct vnode *vp) 1185 1.120 yamt { 1186 1.120 yamt struct nfsnode *np = VTONFS(vp); 1187 1.135 yamt unsigned *dirgens; 1188 1.120 yamt 1189 1.120 yamt KASSERT(VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_XLATECOOKIE); 1190 1.120 yamt 1191 1.196 yamt dirgens = kmem_zalloc(NFS_DIRHASHSIZ * sizeof(unsigned), KM_SLEEP); 1192 1.135 yamt NFSDC_LOCK(np); 1193 1.135 yamt if (np->n_dirgens == NULL) { 1194 1.135 yamt np->n_dirgens = dirgens; 1195 1.135 yamt dirgens = NULL; 1196 1.135 yamt } 1197 1.135 yamt NFSDC_UNLOCK(np); 1198 1.135 yamt if (dirgens) 1199 1.196 yamt kmem_free(dirgens, NFS_DIRHASHSIZ * sizeof(unsigned)); 1200 1.135 yamt } 1201 1.135 yamt 1202 1.135 yamt static const struct nfsdircache dzero; 1203 1.135 yamt 1204 1.213 dsl static void nfs_unlinkdircache(struct nfsnode *np, struct nfsdircache *); 1205 1.213 dsl static void nfs_putdircache_unlocked(struct nfsnode *, 1206 1.213 dsl struct nfsdircache *); 1207 1.135 yamt 1208 1.135 yamt static void 1209 1.214 dsl nfs_unlinkdircache(struct nfsnode *np, struct nfsdircache *ndp) 1210 1.135 yamt { 1211 1.135 yamt 1212 1.135 yamt NFSDC_ASSERT_LOCKED(np); 1213 1.135 yamt KASSERT(ndp != &dzero); 1214 1.135 yamt 1215 1.135 yamt if (LIST_NEXT(ndp, dc_hash) == (void *)-1) 1216 1.135 yamt return; 1217 1.135 yamt 1218 1.135 yamt TAILQ_REMOVE(&np->n_dirchain, ndp, dc_chain); 1219 1.135 yamt LIST_REMOVE(ndp, dc_hash); 1220 1.135 yamt LIST_NEXT(ndp, dc_hash) = (void *)-1; /* mark as unlinked */ 1221 1.135 yamt 1222 1.135 yamt nfs_putdircache_unlocked(np, ndp); 1223 1.135 yamt } 1224 1.135 yamt 1225 1.135 yamt void 1226 1.214 dsl nfs_putdircache(struct nfsnode *np, struct nfsdircache *ndp) 1227 1.135 yamt { 1228 1.135 yamt int ref; 1229 1.135 yamt 1230 1.135 yamt if (ndp == &dzero) 1231 1.135 yamt return; 1232 1.135 yamt 1233 1.135 yamt KASSERT(ndp->dc_refcnt > 0); 1234 1.135 yamt NFSDC_LOCK(np); 1235 1.135 yamt ref = --ndp->dc_refcnt; 1236 1.135 yamt NFSDC_UNLOCK(np); 1237 1.135 yamt 1238 1.135 yamt if (ref == 0) 1239 1.196 yamt kmem_free(ndp, sizeof(*ndp)); 1240 1.49 fvdl } 1241 1.49 fvdl 1242 1.135 yamt static void 1243 1.177 yamt nfs_putdircache_unlocked(struct nfsnode *np, struct nfsdircache *ndp) 1244 1.135 yamt { 1245 1.135 yamt int ref; 1246 1.135 yamt 1247 1.135 yamt NFSDC_ASSERT_LOCKED(np); 1248 1.135 yamt 1249 1.135 yamt if (ndp == &dzero) 1250 1.135 yamt return; 1251 1.135 yamt 1252 1.135 yamt KASSERT(ndp->dc_refcnt > 0); 1253 1.135 yamt ref = --ndp->dc_refcnt; 1254 1.135 yamt if (ref == 0) 1255 1.196 yamt kmem_free(ndp, sizeof(*ndp)); 1256 1.135 yamt } 1257 1.46 fvdl 1258 1.46 fvdl struct nfsdircache * 1259 1.214 dsl nfs_searchdircache(struct vnode *vp, off_t off, int do32, int *hashent) 1260 1.49 fvdl { 1261 1.49 fvdl struct nfsdirhashhead *ndhp; 1262 1.49 fvdl struct nfsdircache *ndp = NULL; 1263 1.49 fvdl struct nfsnode *np = VTONFS(vp); 1264 1.49 fvdl unsigned ent; 1265 1.49 fvdl 1266 1.49 fvdl /* 1267 1.49 fvdl * Zero is always a valid cookie. 1268 1.49 fvdl */ 1269 1.49 fvdl if (off == 0) 1270 1.149 christos /* XXXUNCONST */ 1271 1.149 christos return (struct nfsdircache *)__UNCONST(&dzero); 1272 1.49 fvdl 1273 1.134 yamt if (!np->n_dircache) 1274 1.134 yamt return NULL; 1275 1.134 yamt 1276 1.49 fvdl /* 1277 1.49 fvdl * We use a 32bit cookie as search key, directly reconstruct 1278 1.49 fvdl * the hashentry. Else use the hashfunction. 1279 1.49 fvdl */ 1280 1.49 fvdl if (do32) { 1281 1.49 fvdl ent = (u_int32_t)off >> 24; 1282 1.49 fvdl if (ent >= NFS_DIRHASHSIZ) 1283 1.49 fvdl return NULL; 1284 1.49 fvdl ndhp = &np->n_dircache[ent]; 1285 1.49 fvdl } else { 1286 1.49 fvdl ndhp = NFSDIRHASH(np, off); 1287 1.49 fvdl } 1288 1.49 fvdl 1289 1.49 fvdl if (hashent) 1290 1.49 fvdl *hashent = (int)(ndhp - np->n_dircache); 1291 1.135 yamt 1292 1.135 yamt NFSDC_LOCK(np); 1293 1.49 fvdl if (do32) { 1294 1.113 yamt LIST_FOREACH(ndp, ndhp, dc_hash) { 1295 1.49 fvdl if (ndp->dc_cookie32 == (u_int32_t)off) { 1296 1.49 fvdl /* 1297 1.49 fvdl * An invalidated entry will become the 1298 1.49 fvdl * start of a new block fetched from 1299 1.49 fvdl * the server. 1300 1.49 fvdl */ 1301 1.135 yamt if (ndp->dc_flags & NFSDC_INVALID) { 1302 1.49 fvdl ndp->dc_blkcookie = ndp->dc_cookie; 1303 1.49 fvdl ndp->dc_entry = 0; 1304 1.135 yamt ndp->dc_flags &= ~NFSDC_INVALID; 1305 1.49 fvdl } 1306 1.49 fvdl break; 1307 1.49 fvdl } 1308 1.49 fvdl } 1309 1.49 fvdl } else { 1310 1.113 yamt LIST_FOREACH(ndp, ndhp, dc_hash) { 1311 1.49 fvdl if (ndp->dc_cookie == off) 1312 1.49 fvdl break; 1313 1.113 yamt } 1314 1.49 fvdl } 1315 1.135 yamt if (ndp != NULL) 1316 1.135 yamt ndp->dc_refcnt++; 1317 1.135 yamt NFSDC_UNLOCK(np); 1318 1.49 fvdl return ndp; 1319 1.49 fvdl } 1320 1.49 fvdl 1321 1.49 fvdl 1322 1.49 fvdl struct nfsdircache * 1323 1.171 christos nfs_enterdircache(struct vnode *vp, off_t off, off_t blkoff, int en, 1324 1.177 yamt daddr_t blkno) 1325 1.46 fvdl { 1326 1.46 fvdl struct nfsnode *np = VTONFS(vp); 1327 1.46 fvdl struct nfsdirhashhead *ndhp; 1328 1.135 yamt struct nfsdircache *ndp = NULL; 1329 1.135 yamt struct nfsdircache *newndp = NULL; 1330 1.49 fvdl struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1331 1.161 christos int hashent = 0, gen, overwrite; /* XXX: GCC */ 1332 1.46 fvdl 1333 1.135 yamt /* 1334 1.135 yamt * XXX refuse entries for offset 0. amd(8) erroneously sets 1335 1.135 yamt * cookie 0 for the '.' entry, making this necessary. This 1336 1.135 yamt * isn't so bad, as 0 is a special case anyway. 1337 1.135 yamt */ 1338 1.135 yamt if (off == 0) 1339 1.149 christos /* XXXUNCONST */ 1340 1.149 christos return (struct nfsdircache *)__UNCONST(&dzero); 1341 1.135 yamt 1342 1.49 fvdl if (!np->n_dircache) 1343 1.49 fvdl /* 1344 1.49 fvdl * XXX would like to do this in nfs_nget but vtype 1345 1.49 fvdl * isn't known at that time. 1346 1.49 fvdl */ 1347 1.49 fvdl nfs_initdircache(vp); 1348 1.50 fvdl 1349 1.120 yamt if ((nmp->nm_flag & NFSMNT_XLATECOOKIE) && !np->n_dirgens) 1350 1.120 yamt nfs_initdirxlatecookie(vp); 1351 1.120 yamt 1352 1.135 yamt retry: 1353 1.49 fvdl ndp = nfs_searchdircache(vp, off, 0, &hashent); 1354 1.49 fvdl 1355 1.135 yamt NFSDC_LOCK(np); 1356 1.135 yamt if (ndp && (ndp->dc_flags & NFSDC_INVALID) == 0) { 1357 1.49 fvdl /* 1358 1.49 fvdl * Overwriting an old entry. Check if it's the same. 1359 1.49 fvdl * If so, just return. If not, remove the old entry. 1360 1.49 fvdl */ 1361 1.49 fvdl if (ndp->dc_blkcookie == blkoff && ndp->dc_entry == en) 1362 1.135 yamt goto done; 1363 1.135 yamt nfs_unlinkdircache(np, ndp); 1364 1.135 yamt nfs_putdircache_unlocked(np, ndp); 1365 1.135 yamt ndp = NULL; 1366 1.46 fvdl } 1367 1.46 fvdl 1368 1.49 fvdl ndhp = &np->n_dircache[hashent]; 1369 1.46 fvdl 1370 1.49 fvdl if (!ndp) { 1371 1.135 yamt if (newndp == NULL) { 1372 1.135 yamt NFSDC_UNLOCK(np); 1373 1.196 yamt newndp = kmem_alloc(sizeof(*newndp), KM_SLEEP); 1374 1.135 yamt newndp->dc_refcnt = 1; 1375 1.135 yamt LIST_NEXT(newndp, dc_hash) = (void *)-1; 1376 1.135 yamt goto retry; 1377 1.135 yamt } 1378 1.135 yamt ndp = newndp; 1379 1.135 yamt newndp = NULL; 1380 1.49 fvdl overwrite = 0; 1381 1.49 fvdl if (nmp->nm_flag & NFSMNT_XLATECOOKIE) { 1382 1.49 fvdl /* 1383 1.49 fvdl * We're allocating a new entry, so bump the 1384 1.49 fvdl * generation number. 1385 1.49 fvdl */ 1386 1.160 christos KASSERT(np->n_dirgens); 1387 1.49 fvdl gen = ++np->n_dirgens[hashent]; 1388 1.49 fvdl if (gen == 0) { 1389 1.49 fvdl np->n_dirgens[hashent]++; 1390 1.49 fvdl gen++; 1391 1.49 fvdl } 1392 1.49 fvdl ndp->dc_cookie32 = (hashent << 24) | (gen & 0xffffff); 1393 1.49 fvdl } 1394 1.49 fvdl } else 1395 1.49 fvdl overwrite = 1; 1396 1.46 fvdl 1397 1.49 fvdl ndp->dc_cookie = off; 1398 1.49 fvdl ndp->dc_blkcookie = blkoff; 1399 1.46 fvdl ndp->dc_entry = en; 1400 1.137 yamt ndp->dc_flags = 0; 1401 1.46 fvdl 1402 1.49 fvdl if (overwrite) 1403 1.135 yamt goto done; 1404 1.49 fvdl 1405 1.46 fvdl /* 1406 1.46 fvdl * If the maximum directory cookie cache size has been reached 1407 1.46 fvdl * for this node, take one off the front. The idea is that 1408 1.46 fvdl * directories are typically read front-to-back once, so that 1409 1.46 fvdl * the oldest entries can be thrown away without much performance 1410 1.46 fvdl * loss. 1411 1.46 fvdl */ 1412 1.46 fvdl if (np->n_dircachesize == NFS_MAXDIRCACHE) { 1413 1.135 yamt nfs_unlinkdircache(np, TAILQ_FIRST(&np->n_dirchain)); 1414 1.46 fvdl } else 1415 1.46 fvdl np->n_dircachesize++; 1416 1.148 perry 1417 1.135 yamt KASSERT(ndp->dc_refcnt == 1); 1418 1.46 fvdl LIST_INSERT_HEAD(ndhp, ndp, dc_hash); 1419 1.46 fvdl TAILQ_INSERT_TAIL(&np->n_dirchain, ndp, dc_chain); 1420 1.135 yamt ndp->dc_refcnt++; 1421 1.135 yamt done: 1422 1.135 yamt KASSERT(ndp->dc_refcnt > 0); 1423 1.135 yamt NFSDC_UNLOCK(np); 1424 1.135 yamt if (newndp) 1425 1.135 yamt nfs_putdircache(np, newndp); 1426 1.46 fvdl return ndp; 1427 1.46 fvdl } 1428 1.46 fvdl 1429 1.46 fvdl void 1430 1.214 dsl nfs_invaldircache(struct vnode *vp, int flags) 1431 1.46 fvdl { 1432 1.46 fvdl struct nfsnode *np = VTONFS(vp); 1433 1.46 fvdl struct nfsdircache *ndp = NULL; 1434 1.49 fvdl struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1435 1.181 thorpej const bool forcefree = flags & NFS_INVALDIRCACHE_FORCE; 1436 1.46 fvdl 1437 1.46 fvdl #ifdef DIAGNOSTIC 1438 1.46 fvdl if (vp->v_type != VDIR) 1439 1.46 fvdl panic("nfs: invaldircache: not dir"); 1440 1.46 fvdl #endif 1441 1.46 fvdl 1442 1.145 yamt if ((flags & NFS_INVALDIRCACHE_KEEPEOF) == 0) 1443 1.145 yamt np->n_flag &= ~NEOFVALID; 1444 1.144 yamt 1445 1.46 fvdl if (!np->n_dircache) 1446 1.46 fvdl return; 1447 1.46 fvdl 1448 1.135 yamt NFSDC_LOCK(np); 1449 1.49 fvdl if (!(nmp->nm_flag & NFSMNT_XLATECOOKIE) || forcefree) { 1450 1.135 yamt while ((ndp = TAILQ_FIRST(&np->n_dirchain)) != NULL) { 1451 1.135 yamt KASSERT(!forcefree || ndp->dc_refcnt == 1); 1452 1.135 yamt nfs_unlinkdircache(np, ndp); 1453 1.49 fvdl } 1454 1.49 fvdl np->n_dircachesize = 0; 1455 1.49 fvdl if (forcefree && np->n_dirgens) { 1456 1.196 yamt kmem_free(np->n_dirgens, 1457 1.196 yamt NFS_DIRHASHSIZ * sizeof(unsigned)); 1458 1.120 yamt np->n_dirgens = NULL; 1459 1.49 fvdl } 1460 1.49 fvdl } else { 1461 1.135 yamt TAILQ_FOREACH(ndp, &np->n_dirchain, dc_chain) 1462 1.135 yamt ndp->dc_flags |= NFSDC_INVALID; 1463 1.46 fvdl } 1464 1.46 fvdl 1465 1.135 yamt NFSDC_UNLOCK(np); 1466 1.46 fvdl } 1467 1.46 fvdl 1468 1.1 cgd /* 1469 1.35 thorpej * Called once before VFS init to initialize shared and 1470 1.35 thorpej * server-specific data structures. 1471 1.1 cgd */ 1472 1.157 yamt static int 1473 1.155 thorpej nfs_init0(void) 1474 1.1 cgd { 1475 1.189 ad 1476 1.12 mycroft nfsrtt.pos = 0; 1477 1.1 cgd rpc_vers = txdr_unsigned(RPC_VER2); 1478 1.1 cgd rpc_call = txdr_unsigned(RPC_CALL); 1479 1.1 cgd rpc_reply = txdr_unsigned(RPC_REPLY); 1480 1.1 cgd rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1481 1.1 cgd rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1482 1.1 cgd rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1483 1.12 mycroft rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1484 1.1 cgd rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1485 1.25 fvdl rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1486 1.1 cgd nfs_prog = txdr_unsigned(NFS_PROG); 1487 1.182 thorpej nfs_true = txdr_unsigned(true); 1488 1.182 thorpej nfs_false = txdr_unsigned(false); 1489 1.12 mycroft nfs_xdrneg1 = txdr_unsigned(-1); 1490 1.25 fvdl nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1491 1.25 fvdl if (nfs_ticks < 1) 1492 1.25 fvdl nfs_ticks = 1; 1493 1.221.2.4 yamt nfs_xid = cprng_fast32(); 1494 1.164 yamt nfsdreq_init(); 1495 1.164 yamt 1496 1.1 cgd /* 1497 1.1 cgd * Initialize reply list and start timer 1498 1.1 cgd */ 1499 1.16 mycroft TAILQ_INIT(&nfs_reqq); 1500 1.191 yamt nfs_timer_init(); 1501 1.109 matt MOWNER_ATTACH(&nfs_mowner); 1502 1.106 jdolecek 1503 1.157 yamt return 0; 1504 1.1 cgd } 1505 1.1 cgd 1506 1.221.2.5 yamt static volatile uint32_t nfs_mutex; 1507 1.221.2.5 yamt static uint32_t nfs_refcount; 1508 1.221.2.5 yamt 1509 1.221.2.5 yamt #define nfs_p() while (atomic_cas_32(&nfs_mutex, 0, 1) == 0) continue; 1510 1.221.2.5 yamt #define nfs_v() while (atomic_cas_32(&nfs_mutex, 1, 0) == 1) continue; 1511 1.221.2.5 yamt 1512 1.210 ad /* 1513 1.210 ad * This is disgusting, but it must support both modular and monolothic 1514 1.221.2.5 yamt * configurations, plus the code is shared between server and client. 1515 1.221.2.5 yamt * For monolithic builds NFSSERVER may not imply NFS. Unfortunately we 1516 1.221.2.5 yamt * can't use regular mutexes here that would require static initialization 1517 1.221.2.5 yamt * and we can get initialized from multiple places, so we improvise. 1518 1.210 ad * 1519 1.210 ad * Yuck. 1520 1.210 ad */ 1521 1.155 thorpej void 1522 1.155 thorpej nfs_init(void) 1523 1.155 thorpej { 1524 1.155 thorpej 1525 1.221.2.5 yamt nfs_p(); 1526 1.221.2.5 yamt if (nfs_refcount++ == 0) 1527 1.221.2.5 yamt nfs_init0(); 1528 1.221.2.5 yamt nfs_v(); 1529 1.155 thorpej } 1530 1.155 thorpej 1531 1.210 ad void 1532 1.210 ad nfs_fini(void) 1533 1.210 ad { 1534 1.210 ad 1535 1.221.2.5 yamt nfs_p(); 1536 1.221.2.5 yamt if (--nfs_refcount == 0) { 1537 1.221.2.5 yamt MOWNER_DETACH(&nfs_mowner); 1538 1.221.2.5 yamt nfs_timer_fini(); 1539 1.221.2.5 yamt nfsdreq_fini(); 1540 1.221.2.5 yamt } 1541 1.221.2.5 yamt nfs_v(); 1542 1.210 ad } 1543 1.210 ad 1544 1.1 cgd /* 1545 1.118 yamt * A fiddled version of m_adj() that ensures null fill to a 32-bit 1546 1.1 cgd * boundary and only trims off the back end 1547 1.122 yamt * 1548 1.122 yamt * 1. trim off 'len' bytes as m_adj(mp, -len). 1549 1.122 yamt * 2. add zero-padding 'nul' bytes at the end of the mbuf chain. 1550 1.1 cgd */ 1551 1.12 mycroft void 1552 1.214 dsl nfs_zeropad(struct mbuf *mp, int len, int nul) 1553 1.1 cgd { 1554 1.75 augustss struct mbuf *m; 1555 1.130 yamt int count; 1556 1.1 cgd 1557 1.1 cgd /* 1558 1.1 cgd * Trim from tail. Scan the mbuf chain, 1559 1.1 cgd * calculating its length and finding the last mbuf. 1560 1.1 cgd * If the adjustment only affects this mbuf, then just 1561 1.1 cgd * adjust and return. Otherwise, rescan and truncate 1562 1.1 cgd * after the remaining size. 1563 1.1 cgd */ 1564 1.1 cgd count = 0; 1565 1.1 cgd m = mp; 1566 1.1 cgd for (;;) { 1567 1.1 cgd count += m->m_len; 1568 1.122 yamt if (m->m_next == NULL) 1569 1.1 cgd break; 1570 1.1 cgd m = m->m_next; 1571 1.1 cgd } 1572 1.122 yamt 1573 1.122 yamt KDASSERT(count >= len); 1574 1.122 yamt 1575 1.122 yamt if (m->m_len >= len) { 1576 1.1 cgd m->m_len -= len; 1577 1.122 yamt } else { 1578 1.122 yamt count -= len; 1579 1.122 yamt /* 1580 1.122 yamt * Correct length for chain is "count". 1581 1.122 yamt * Find the mbuf with last data, adjust its length, 1582 1.122 yamt * and toss data from remaining mbufs on chain. 1583 1.122 yamt */ 1584 1.122 yamt for (m = mp; m; m = m->m_next) { 1585 1.122 yamt if (m->m_len >= count) { 1586 1.122 yamt m->m_len = count; 1587 1.122 yamt break; 1588 1.118 yamt } 1589 1.122 yamt count -= m->m_len; 1590 1.1 cgd } 1591 1.159 christos KASSERT(m && m->m_next); 1592 1.122 yamt m_freem(m->m_next); 1593 1.122 yamt m->m_next = NULL; 1594 1.1 cgd } 1595 1.122 yamt 1596 1.130 yamt KDASSERT(m->m_next == NULL); 1597 1.130 yamt 1598 1.122 yamt /* 1599 1.122 yamt * zero-padding. 1600 1.122 yamt */ 1601 1.122 yamt if (nul > 0) { 1602 1.130 yamt char *cp; 1603 1.130 yamt int i; 1604 1.130 yamt 1605 1.122 yamt if (M_ROMAP(m) || M_TRAILINGSPACE(m) < nul) { 1606 1.122 yamt struct mbuf *n; 1607 1.122 yamt 1608 1.122 yamt KDASSERT(MLEN >= nul); 1609 1.122 yamt n = m_get(M_WAIT, MT_DATA); 1610 1.122 yamt MCLAIM(n, &nfs_mowner); 1611 1.122 yamt n->m_len = nul; 1612 1.130 yamt n->m_next = NULL; 1613 1.122 yamt m->m_next = n; 1614 1.183 christos cp = mtod(n, void *); 1615 1.122 yamt } else { 1616 1.183 christos cp = mtod(m, char *) + m->m_len; 1617 1.122 yamt m->m_len += nul; 1618 1.1 cgd } 1619 1.122 yamt for (i = 0; i < nul; i++) 1620 1.122 yamt *cp++ = '\0'; 1621 1.1 cgd } 1622 1.122 yamt return; 1623 1.1 cgd } 1624 1.1 cgd 1625 1.1 cgd /* 1626 1.25 fvdl * Make these functions instead of macros, so that the kernel text size 1627 1.25 fvdl * doesn't get too big... 1628 1.25 fvdl */ 1629 1.25 fvdl void 1630 1.214 dsl nfsm_srvwcc(struct nfsrv_descript *nfsd, int before_ret, struct vattr *before_vap, int after_ret, struct vattr *after_vap, struct mbuf **mbp, char **bposp) 1631 1.25 fvdl { 1632 1.109 matt struct mbuf *mb = *mbp; 1633 1.75 augustss char *bpos = *bposp; 1634 1.75 augustss u_int32_t *tl; 1635 1.25 fvdl 1636 1.25 fvdl if (before_ret) { 1637 1.25 fvdl nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1638 1.25 fvdl *tl = nfs_false; 1639 1.25 fvdl } else { 1640 1.25 fvdl nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 1641 1.25 fvdl *tl++ = nfs_true; 1642 1.66 fair txdr_hyper(before_vap->va_size, tl); 1643 1.25 fvdl tl += 2; 1644 1.25 fvdl txdr_nfsv3time(&(before_vap->va_mtime), tl); 1645 1.25 fvdl tl += 2; 1646 1.25 fvdl txdr_nfsv3time(&(before_vap->va_ctime), tl); 1647 1.25 fvdl } 1648 1.25 fvdl *bposp = bpos; 1649 1.25 fvdl *mbp = mb; 1650 1.25 fvdl nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1651 1.25 fvdl } 1652 1.25 fvdl 1653 1.25 fvdl void 1654 1.214 dsl nfsm_srvpostopattr(struct nfsrv_descript *nfsd, int after_ret, struct vattr *after_vap, struct mbuf **mbp, char **bposp) 1655 1.25 fvdl { 1656 1.109 matt struct mbuf *mb = *mbp; 1657 1.75 augustss char *bpos = *bposp; 1658 1.75 augustss u_int32_t *tl; 1659 1.75 augustss struct nfs_fattr *fp; 1660 1.25 fvdl 1661 1.25 fvdl if (after_ret) { 1662 1.25 fvdl nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1663 1.25 fvdl *tl = nfs_false; 1664 1.25 fvdl } else { 1665 1.25 fvdl nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 1666 1.25 fvdl *tl++ = nfs_true; 1667 1.25 fvdl fp = (struct nfs_fattr *)tl; 1668 1.25 fvdl nfsm_srvfattr(nfsd, after_vap, fp); 1669 1.25 fvdl } 1670 1.25 fvdl *mbp = mb; 1671 1.25 fvdl *bposp = bpos; 1672 1.25 fvdl } 1673 1.25 fvdl 1674 1.25 fvdl void 1675 1.214 dsl nfsm_srvfattr(struct nfsrv_descript *nfsd, struct vattr *vap, struct nfs_fattr *fp) 1676 1.25 fvdl { 1677 1.25 fvdl 1678 1.25 fvdl fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1679 1.25 fvdl fp->fa_uid = txdr_unsigned(vap->va_uid); 1680 1.25 fvdl fp->fa_gid = txdr_unsigned(vap->va_gid); 1681 1.25 fvdl if (nfsd->nd_flag & ND_NFSV3) { 1682 1.25 fvdl fp->fa_type = vtonfsv3_type(vap->va_type); 1683 1.25 fvdl fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1684 1.66 fair txdr_hyper(vap->va_size, &fp->fa3_size); 1685 1.66 fair txdr_hyper(vap->va_bytes, &fp->fa3_used); 1686 1.25 fvdl fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 1687 1.25 fvdl fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 1688 1.25 fvdl fp->fa3_fsid.nfsuquad[0] = 0; 1689 1.25 fvdl fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1690 1.151 yamt txdr_hyper(vap->va_fileid, &fp->fa3_fileid); 1691 1.25 fvdl txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1692 1.25 fvdl txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1693 1.25 fvdl txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1694 1.25 fvdl } else { 1695 1.25 fvdl fp->fa_type = vtonfsv2_type(vap->va_type); 1696 1.25 fvdl fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1697 1.25 fvdl fp->fa2_size = txdr_unsigned(vap->va_size); 1698 1.25 fvdl fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1699 1.25 fvdl if (vap->va_type == VFIFO) 1700 1.25 fvdl fp->fa2_rdev = 0xffffffff; 1701 1.25 fvdl else 1702 1.25 fvdl fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1703 1.25 fvdl fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1704 1.25 fvdl fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1705 1.25 fvdl fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1706 1.25 fvdl txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1707 1.25 fvdl txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1708 1.25 fvdl txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1709 1.25 fvdl } 1710 1.25 fvdl } 1711 1.25 fvdl 1712 1.1 cgd /* 1713 1.182 thorpej * This function compares two net addresses by family and returns true 1714 1.12 mycroft * if they are the same host. 1715 1.182 thorpej * If there is any doubt, return false. 1716 1.12 mycroft * The AF_INET family is handled as a special case so that address mbufs 1717 1.12 mycroft * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1718 1.1 cgd */ 1719 1.24 christos int 1720 1.214 dsl netaddr_match(int family, union nethostaddr *haddr, struct mbuf *nam) 1721 1.1 cgd { 1722 1.75 augustss struct sockaddr_in *inetaddr; 1723 1.1 cgd 1724 1.12 mycroft switch (family) { 1725 1.12 mycroft case AF_INET: 1726 1.12 mycroft inetaddr = mtod(nam, struct sockaddr_in *); 1727 1.12 mycroft if (inetaddr->sin_family == AF_INET && 1728 1.12 mycroft inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1729 1.12 mycroft return (1); 1730 1.12 mycroft break; 1731 1.76 fvdl case AF_INET6: 1732 1.76 fvdl { 1733 1.76 fvdl struct sockaddr_in6 *sin6_1, *sin6_2; 1734 1.76 fvdl 1735 1.76 fvdl sin6_1 = mtod(nam, struct sockaddr_in6 *); 1736 1.76 fvdl sin6_2 = mtod(haddr->had_nam, struct sockaddr_in6 *); 1737 1.76 fvdl if (sin6_1->sin6_family == AF_INET6 && 1738 1.76 fvdl IN6_ARE_ADDR_EQUAL(&sin6_1->sin6_addr, &sin6_2->sin6_addr)) 1739 1.76 fvdl return 1; 1740 1.76 fvdl } 1741 1.12 mycroft default: 1742 1.12 mycroft break; 1743 1.12 mycroft }; 1744 1.12 mycroft return (0); 1745 1.25 fvdl } 1746 1.25 fvdl 1747 1.25 fvdl /* 1748 1.25 fvdl * The write verifier has changed (probably due to a server reboot), so all 1749 1.114 yamt * PG_NEEDCOMMIT pages will have to be written again. Since they are marked 1750 1.117 yamt * as dirty or are being written out just now, all this takes is clearing 1751 1.117 yamt * the PG_NEEDCOMMIT flag. Once done the new write verifier can be set for 1752 1.117 yamt * the mount point. 1753 1.25 fvdl */ 1754 1.25 fvdl void 1755 1.214 dsl nfs_clearcommit(struct mount *mp) 1756 1.25 fvdl { 1757 1.89 chs struct vnode *vp; 1758 1.221.2.5 yamt struct vnode_iterator *marker; 1759 1.83 fvdl struct nfsnode *np; 1760 1.89 chs struct vm_page *pg; 1761 1.116 yamt struct nfsmount *nmp = VFSTONFS(mp); 1762 1.116 yamt 1763 1.180 yamt rw_enter(&nmp->nm_writeverflock, RW_WRITER); 1764 1.221.2.5 yamt vfs_vnode_iterator_init(mp, &marker); 1765 1.221.2.5 yamt while (vfs_vnode_iterator_next(marker, &vp)) { 1766 1.221 rmind mutex_enter(vp->v_interlock); 1767 1.221.2.5 yamt np = VTONFS(vp); 1768 1.221.2.5 yamt if (vp->v_type != VREG || vp->v_mount != mp || np == NULL) { 1769 1.221 rmind mutex_exit(vp->v_interlock); 1770 1.221.2.5 yamt vrele(vp); 1771 1.217 yamt continue; 1772 1.217 yamt } 1773 1.221.2.5 yamt np->n_pushlo = np->n_pushhi = np->n_pushedlo = 1774 1.221.2.5 yamt np->n_pushedhi = 0; 1775 1.83 fvdl np->n_commitflags &= 1776 1.83 fvdl ~(NFS_COMMIT_PUSH_VALID | NFS_COMMIT_PUSHED_VALID); 1777 1.221.2.2 yamt uvm_page_array_init(&a); 1778 1.221.2.2 yamt off = 0; 1779 1.221.2.2 yamt while ((pg = uvm_page_array_fill_and_peek(&a, &vp->v_uobj, off, 1780 1.221.2.3 yamt 0, 0)) != NULL) { 1781 1.89 chs pg->flags &= ~PG_NEEDCOMMIT; 1782 1.221.2.2 yamt uvm_page_array_advance(&a); 1783 1.221.2.2 yamt off = pg->offset + PAGE_SIZE; 1784 1.25 fvdl } 1785 1.221.2.2 yamt uvm_page_array_fini(&a); 1786 1.221 rmind mutex_exit(vp->v_interlock); 1787 1.221.2.5 yamt vrele(vp); 1788 1.25 fvdl } 1789 1.221.2.5 yamt vfs_vnode_iterator_destroy(marker); 1790 1.186 yamt mutex_enter(&nmp->nm_lock); 1791 1.116 yamt nmp->nm_iflag &= ~NFSMNT_STALEWRITEVERF; 1792 1.186 yamt mutex_exit(&nmp->nm_lock); 1793 1.180 yamt rw_exit(&nmp->nm_writeverflock); 1794 1.83 fvdl } 1795 1.83 fvdl 1796 1.83 fvdl void 1797 1.214 dsl nfs_merge_commit_ranges(struct vnode *vp) 1798 1.83 fvdl { 1799 1.83 fvdl struct nfsnode *np = VTONFS(vp); 1800 1.112 yamt 1801 1.112 yamt KASSERT(np->n_commitflags & NFS_COMMIT_PUSH_VALID); 1802 1.221.2.1 yamt nfs_add_committed_range(vp, np->n_pushlo, np->n_pushhi - np->n_pushlo); 1803 1.83 fvdl np->n_commitflags &= ~NFS_COMMIT_PUSH_VALID; 1804 1.83 fvdl 1805 1.111 yamt #ifdef NFS_DEBUG_COMMIT 1806 1.83 fvdl printf("merge: committed: %u - %u\n", (unsigned)np->n_pushedlo, 1807 1.83 fvdl (unsigned)np->n_pushedhi); 1808 1.83 fvdl #endif 1809 1.83 fvdl } 1810 1.83 fvdl 1811 1.83 fvdl int 1812 1.215 dsl nfs_in_committed_range(struct vnode *vp, off_t off, off_t len) 1813 1.83 fvdl { 1814 1.83 fvdl struct nfsnode *np = VTONFS(vp); 1815 1.83 fvdl off_t lo, hi; 1816 1.83 fvdl 1817 1.83 fvdl if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) 1818 1.83 fvdl return 0; 1819 1.89 chs lo = off; 1820 1.89 chs hi = lo + len; 1821 1.83 fvdl 1822 1.83 fvdl return (lo >= np->n_pushedlo && hi <= np->n_pushedhi); 1823 1.83 fvdl } 1824 1.83 fvdl 1825 1.83 fvdl int 1826 1.215 dsl nfs_in_tobecommitted_range(struct vnode *vp, off_t off, off_t len) 1827 1.83 fvdl { 1828 1.83 fvdl struct nfsnode *np = VTONFS(vp); 1829 1.83 fvdl off_t lo, hi; 1830 1.83 fvdl 1831 1.83 fvdl if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) 1832 1.83 fvdl return 0; 1833 1.89 chs lo = off; 1834 1.89 chs hi = lo + len; 1835 1.83 fvdl 1836 1.83 fvdl return (lo >= np->n_pushlo && hi <= np->n_pushhi); 1837 1.83 fvdl } 1838 1.83 fvdl 1839 1.83 fvdl void 1840 1.215 dsl nfs_add_committed_range(struct vnode *vp, off_t off, off_t len) 1841 1.83 fvdl { 1842 1.83 fvdl struct nfsnode *np = VTONFS(vp); 1843 1.83 fvdl off_t lo, hi; 1844 1.83 fvdl 1845 1.89 chs lo = off; 1846 1.89 chs hi = lo + len; 1847 1.83 fvdl 1848 1.83 fvdl if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) { 1849 1.83 fvdl np->n_pushedlo = lo; 1850 1.83 fvdl np->n_pushedhi = hi; 1851 1.83 fvdl np->n_commitflags |= NFS_COMMIT_PUSHED_VALID; 1852 1.83 fvdl } else { 1853 1.221.2.1 yamt /* 1854 1.221.2.1 yamt * note that it's unsafe to add more than requested. 1855 1.221.2.1 yamt */ 1856 1.221.2.1 yamt if (hi > np->n_pushedhi && lo <= np->n_pushedhi) 1857 1.83 fvdl np->n_pushedhi = hi; 1858 1.221.2.1 yamt if (lo < np->n_pushedlo && hi >= np->n_pushedlo) 1859 1.83 fvdl np->n_pushedlo = lo; 1860 1.83 fvdl } 1861 1.221.2.1 yamt KASSERT(np->n_pushedhi >= np->n_pushedlo); 1862 1.111 yamt #ifdef NFS_DEBUG_COMMIT 1863 1.83 fvdl printf("add: committed: %u - %u\n", (unsigned)np->n_pushedlo, 1864 1.83 fvdl (unsigned)np->n_pushedhi); 1865 1.83 fvdl #endif 1866 1.83 fvdl } 1867 1.83 fvdl 1868 1.83 fvdl void 1869 1.215 dsl nfs_del_committed_range(struct vnode *vp, off_t off, off_t len) 1870 1.83 fvdl { 1871 1.83 fvdl struct nfsnode *np = VTONFS(vp); 1872 1.83 fvdl off_t lo, hi; 1873 1.83 fvdl 1874 1.83 fvdl if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) 1875 1.83 fvdl return; 1876 1.83 fvdl 1877 1.89 chs lo = off; 1878 1.89 chs hi = lo + len; 1879 1.83 fvdl 1880 1.83 fvdl if (lo > np->n_pushedhi || hi < np->n_pushedlo) 1881 1.83 fvdl return; 1882 1.83 fvdl if (lo <= np->n_pushedlo) 1883 1.83 fvdl np->n_pushedlo = hi; 1884 1.83 fvdl else if (hi >= np->n_pushedhi) 1885 1.83 fvdl np->n_pushedhi = lo; 1886 1.83 fvdl else { 1887 1.83 fvdl /* 1888 1.83 fvdl * XXX There's only one range. If the deleted range 1889 1.83 fvdl * is in the middle, pick the largest of the 1890 1.83 fvdl * contiguous ranges that it leaves. 1891 1.83 fvdl */ 1892 1.83 fvdl if ((np->n_pushedlo - lo) > (hi - np->n_pushedhi)) 1893 1.83 fvdl np->n_pushedhi = lo; 1894 1.83 fvdl else 1895 1.83 fvdl np->n_pushedlo = hi; 1896 1.83 fvdl } 1897 1.221.2.1 yamt if (np->n_pushedhi <= np->n_pushedlo) { 1898 1.221.2.1 yamt np->n_commitflags &= ~NFS_COMMIT_PUSHED_VALID; 1899 1.221.2.1 yamt } 1900 1.111 yamt #ifdef NFS_DEBUG_COMMIT 1901 1.83 fvdl printf("del: committed: %u - %u\n", (unsigned)np->n_pushedlo, 1902 1.83 fvdl (unsigned)np->n_pushedhi); 1903 1.83 fvdl #endif 1904 1.83 fvdl } 1905 1.83 fvdl 1906 1.83 fvdl void 1907 1.215 dsl nfs_add_tobecommitted_range(struct vnode *vp, off_t off, off_t len) 1908 1.83 fvdl { 1909 1.83 fvdl struct nfsnode *np = VTONFS(vp); 1910 1.83 fvdl off_t lo, hi; 1911 1.83 fvdl 1912 1.89 chs lo = off; 1913 1.89 chs hi = lo + len; 1914 1.83 fvdl 1915 1.83 fvdl if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) { 1916 1.83 fvdl np->n_pushlo = lo; 1917 1.83 fvdl np->n_pushhi = hi; 1918 1.83 fvdl np->n_commitflags |= NFS_COMMIT_PUSH_VALID; 1919 1.83 fvdl } else { 1920 1.83 fvdl if (lo < np->n_pushlo) 1921 1.83 fvdl np->n_pushlo = lo; 1922 1.83 fvdl if (hi > np->n_pushhi) 1923 1.83 fvdl np->n_pushhi = hi; 1924 1.83 fvdl } 1925 1.221.2.1 yamt KASSERT(np->n_pushhi >= np->n_pushlo); 1926 1.111 yamt #ifdef NFS_DEBUG_COMMIT 1927 1.83 fvdl printf("add: tobecommitted: %u - %u\n", (unsigned)np->n_pushlo, 1928 1.83 fvdl (unsigned)np->n_pushhi); 1929 1.83 fvdl #endif 1930 1.83 fvdl } 1931 1.83 fvdl 1932 1.83 fvdl void 1933 1.215 dsl nfs_del_tobecommitted_range(struct vnode *vp, off_t off, off_t len) 1934 1.83 fvdl { 1935 1.83 fvdl struct nfsnode *np = VTONFS(vp); 1936 1.83 fvdl off_t lo, hi; 1937 1.83 fvdl 1938 1.83 fvdl if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) 1939 1.83 fvdl return; 1940 1.83 fvdl 1941 1.89 chs lo = off; 1942 1.89 chs hi = lo + len; 1943 1.83 fvdl 1944 1.83 fvdl if (lo > np->n_pushhi || hi < np->n_pushlo) 1945 1.83 fvdl return; 1946 1.83 fvdl 1947 1.83 fvdl if (lo <= np->n_pushlo) 1948 1.83 fvdl np->n_pushlo = hi; 1949 1.83 fvdl else if (hi >= np->n_pushhi) 1950 1.83 fvdl np->n_pushhi = lo; 1951 1.83 fvdl else { 1952 1.83 fvdl /* 1953 1.221.2.1 yamt * following can cause a lot of small (eg. 64KB) commit rpcs. 1954 1.221.2.1 yamt */ 1955 1.221.2.1 yamt #if 0 1956 1.221.2.1 yamt /* 1957 1.83 fvdl * XXX There's only one range. If the deleted range 1958 1.83 fvdl * is in the middle, pick the largest of the 1959 1.83 fvdl * contiguous ranges that it leaves. 1960 1.83 fvdl */ 1961 1.83 fvdl if ((np->n_pushlo - lo) > (hi - np->n_pushhi)) 1962 1.83 fvdl np->n_pushhi = lo; 1963 1.83 fvdl else 1964 1.83 fvdl np->n_pushlo = hi; 1965 1.221.2.1 yamt #endif 1966 1.221.2.1 yamt } 1967 1.221.2.1 yamt if (np->n_pushhi <= np->n_pushlo) { 1968 1.221.2.1 yamt np->n_commitflags &= ~NFS_COMMIT_PUSH_VALID; 1969 1.83 fvdl } 1970 1.111 yamt #ifdef NFS_DEBUG_COMMIT 1971 1.83 fvdl printf("del: tobecommitted: %u - %u\n", (unsigned)np->n_pushlo, 1972 1.83 fvdl (unsigned)np->n_pushhi); 1973 1.83 fvdl #endif 1974 1.25 fvdl } 1975 1.25 fvdl 1976 1.25 fvdl /* 1977 1.25 fvdl * Map errnos to NFS error numbers. For Version 3 also filter out error 1978 1.25 fvdl * numbers not specified for the associated procedure. 1979 1.25 fvdl */ 1980 1.25 fvdl int 1981 1.214 dsl nfsrv_errmap(struct nfsrv_descript *nd, int err) 1982 1.25 fvdl { 1983 1.90 jdolecek const short *defaulterrp, *errp; 1984 1.25 fvdl 1985 1.25 fvdl if (nd->nd_flag & ND_NFSV3) { 1986 1.25 fvdl if (nd->nd_procnum <= NFSPROC_COMMIT) { 1987 1.25 fvdl errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 1988 1.25 fvdl while (*++errp) { 1989 1.25 fvdl if (*errp == err) 1990 1.25 fvdl return (err); 1991 1.25 fvdl else if (*errp > err) 1992 1.25 fvdl break; 1993 1.25 fvdl } 1994 1.25 fvdl return ((int)*defaulterrp); 1995 1.25 fvdl } else 1996 1.25 fvdl return (err & 0xffff); 1997 1.25 fvdl } 1998 1.25 fvdl if (err <= ELAST) 1999 1.25 fvdl return ((int)nfsrv_v2errmap[err - 1]); 2000 1.25 fvdl return (NFSERR_IO); 2001 1.25 fvdl } 2002 1.25 fvdl 2003 1.126 yamt u_int32_t 2004 1.216 cegger nfs_getxid(void) 2005 1.126 yamt { 2006 1.126 yamt u_int32_t newxid; 2007 1.126 yamt 2008 1.207 pooka /* get next xid. skip 0 */ 2009 1.207 pooka do { 2010 1.207 pooka newxid = atomic_inc_32_nv(&nfs_xid); 2011 1.207 pooka } while (__predict_false(newxid == 0)); 2012 1.126 yamt 2013 1.126 yamt return txdr_unsigned(newxid); 2014 1.126 yamt } 2015 1.126 yamt 2016 1.126 yamt /* 2017 1.126 yamt * assign a new xid for existing request. 2018 1.126 yamt * used for NFSERR_JUKEBOX handling. 2019 1.126 yamt */ 2020 1.126 yamt void 2021 1.126 yamt nfs_renewxid(struct nfsreq *req) 2022 1.126 yamt { 2023 1.126 yamt u_int32_t xid; 2024 1.126 yamt int off; 2025 1.126 yamt 2026 1.126 yamt xid = nfs_getxid(); 2027 1.126 yamt if (req->r_nmp->nm_sotype == SOCK_STREAM) 2028 1.126 yamt off = sizeof(u_int32_t); /* RPC record mark */ 2029 1.126 yamt else 2030 1.126 yamt off = 0; 2031 1.126 yamt 2032 1.126 yamt m_copyback(req->r_mreq, off, sizeof(xid), (void *)&xid); 2033 1.126 yamt req->r_xid = xid; 2034 1.1 cgd } 2035
Indexes created Fri Oct 03 02:09:57 GMT 2025