ops_udf.c revision 310490
1/* 2 * Copyright (c) 1997-2014 Erez Zadok 3 * Copyright (c) 1990 Jan-Simon Pendry 4 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine 5 * Copyright (c) 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Jan-Simon Pendry at Imperial College, London. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * 36 * File: am-utils/amd/ops_udf.c 37 * 38 */ 39 40/* 41 * UDF file system 42 */ 43 44#ifdef HAVE_CONFIG_H 45# include <config.h> 46#endif /* HAVE_CONFIG_H */ 47#include <am_defs.h> 48#include <amd.h> 49 50/* forward definitions */ 51static char *udf_match(am_opts *fo); 52static int udf_mount(am_node *am, mntfs *mf); 53static int udf_umount(am_node *am, mntfs *mf); 54 55/* 56 * Ops structure 57 */ 58am_ops udf_ops = 59{ 60 "udf", 61 udf_match, 62 0, /* udf_init */ 63 udf_mount, 64 udf_umount, 65 amfs_error_lookup_child, 66 amfs_error_mount_child, 67 amfs_error_readdir, 68 0, /* udf_readlink */ 69 0, /* udf_mounted */ 70 0, /* udf_umounted */ 71 amfs_generic_find_srvr, 72 0, /* udf_get_wchan */ 73 FS_MKMNT | FS_UBACKGROUND | FS_AMQINFO, /* nfs_fs_flags */ 74#ifdef HAVE_FS_AUTOFS 75 AUTOFS_UDF_FS_FLAGS, 76#endif /* HAVE_FS_AUTOFS */ 77}; 78 79#if defined(HAVE_UDF_ARGS_T_NOBODY_GID) || defined(HAVE_UDF_ARGS_T_NOBODY_UID) 80static int 81a_num(const char *s, const char *id_type) 82{ 83 int id; 84 char *ep; 85 86 id = strtol(s, &ep, 0); 87 if (*ep || s == ep || id < 0) { 88 plog(XLOG_ERROR, "mount_udf: unknown %s: %s", id_type, s); 89 return 0; 90 } 91 return id; 92} 93#endif /* defined(HAVE_UDF_ARGS_T_NOBODY_GID) || defined(HAVE_UDF_ARGS_T_NOBODY_UID) */ 94 95#if defined(HAVE_UDF_ARGS_T_NOBODY_GID) 96static gid_t 97a_gid(const char *s, const char *id_type) 98{ 99 struct group *gr; 100 101 if ((gr = getgrnam(s)) != NULL) 102 return gr->gr_gid; 103 return a_num(s, id_type); 104} 105#endif /* defined(HAVE_UDF_ARGS_T_NOBODY_GID) */ 106 107#if defined(HAVE_UDF_ARGS_T_NOBODY_UID) 108static uid_t 109a_uid(const char *s, const char *id_type) 110{ 111 struct passwd *pw; 112 113 if ((pw = getpwnam(s)) != NULL) 114 return pw->pw_uid; 115 return a_num(s, id_type); 116} 117#endif /* defined(HAVE_UDF_ARGS_T_NOBODY_UID) */ 118 119/* 120 * UDF needs remote filesystem. 121 */ 122static char * 123udf_match(am_opts *fo) 124{ 125 126 if (!fo->opt_dev) { 127 plog(XLOG_USER, "udf: no source device specified"); 128 return 0; 129 } 130 dlog("UDF: mounting device \"%s\" on \"%s\"", fo->opt_dev, fo->opt_fs); 131 132 /* 133 * Determine magic cookie to put in mtab 134 */ 135 return xstrdup(fo->opt_dev); 136} 137 138static int 139mount_udf(char *mntdir, char *fs_name, char *opts, int on_autofs) 140{ 141 udf_args_t udf_args; 142 mntent_t mnt; 143 int flags; 144 char *str; 145#if defined(HAVE_UDF_ARGS_T_NOBODY_UID) || defined(HAVE_UDF_ARGS_T_ANON_UID) 146 uid_t uid_nobody; 147 gid_t gid_nobody; 148#endif /* defined(HAVE_UDF_ARGS_T_NOBODY_UID) || defined(HAVE_UDF_ARGS_T_ANON_UID) */ 149 /* 150 * Figure out the name of the file system type. 151 */ 152 MTYPE_TYPE type = MOUNT_TYPE_UDF; 153 154#if defined(HAVE_UDF_ARGS_T_NOBODY_UID) || defined(HAVE_UDF_ARGS_T_ANON_UID) 155 uid_nobody = a_uid("nobody", "user"); 156 if (uid_nobody == 0) { 157 plog(XLOG_ERROR, "mount_udf: invalid uid for nobody"); 158 return EPERM; 159 } 160#endif /* defined(HAVE_UDF_ARGS_T_NOBODY_UID) || defined(HAVE_UDF_ARGS_T_ANON_UID) */ 161 162#if defined(HAVE_UDF_ARGS_T_NOBODY_GID) || defined(HAVE_UDF_ARGS_T_ANON_GID) 163 gid_nobody = a_gid("nobody", "group"); 164 if (gid_nobody == 0) { 165 plog(XLOG_ERROR, "mount_udf: invalid gid for nobody"); 166 return EPERM; 167 } 168#endif /* defined(HAVE_UDF_ARGS_T_NOBODY_GID) || defined(HAVE_UDF_ARGS_T_ANON_GID) */ 169 170 str = NULL; 171 memset((voidp) &udf_args, 0, sizeof(udf_args)); /* Paranoid */ 172 173 /* 174 * Fill in the mount structure 175 */ 176 memset((voidp)&mnt, 0, sizeof(mnt)); 177 mnt.mnt_dir = mntdir; 178 mnt.mnt_fsname = fs_name; 179 mnt.mnt_type = MNTTAB_TYPE_UDF; 180 mnt.mnt_opts = opts; 181 182 flags = compute_mount_flags(&mnt); 183 184#ifdef HAVE_UDF_ARGS_T_UDFMFLAGS 185# if defined(MNT2_UDF_OPT_CLOSESESSION) && defined(MNTTAB_OPT_CLOSESESSION) 186 if (amu_hasmntopt(&mnt, MNTTAB_OPT_CLOSESESSION)) 187 udf_args.udfmflags |= MNT2_UDF_OPT_CLOSESESSION; 188# endif /* defined(MNT2_UDF_OPT_CLOSESESSION) && defined(MNTTAB_OPT_CLOSESESSION) */ 189#endif /* HAVE_UDF_ARGS_T_UDFMFLAGS */ 190 191#ifdef HAVE_UDF_ARGS_T_NOBODY_UID 192 udf_args.nobody_uid = uid_nobody; 193#endif /* HAVE_UDF_ARGS_T_NOBODY_UID */ 194 195#ifdef HAVE_UDF_ARGS_T_NOBODY_GID 196 udf_args.nobody_gid = gid_nobody; 197#endif /* HAVE_UDF_ARGS_T_NOBODY_GID */ 198 199#ifdef HAVE_UDF_ARGS_T_ANON_UID 200 udf_args.anon_uid = uid_nobody; /* default to nobody */ 201 if ((str = hasmntstr(&mnt, MNTTAB_OPT_USER)) != NULL) { 202 udf_args.anon_uid = a_uid(str, MNTTAB_OPT_USER); 203 XFREE(str); 204 } 205#endif /* HAVE_UDF_ARGS_T_ANON_UID */ 206 207#ifdef HAVE_UDF_ARGS_T_ANON_GID 208 udf_args.anon_gid = gid_nobody; /* default to nobody */ 209 if ((str = hasmntstr(&mnt, MNTTAB_OPT_GROUP)) != NULL) { 210 udf_args.anon_gid = a_gid(str, MNTTAB_OPT_GROUP); 211 XFREE(str); 212 } 213#endif /* HAVE_UDF_ARGS_T_ANON_GID */ 214 215#ifdef HAVE_UDF_ARGS_T_GMTOFF 216 udf_args.gmtoff = 0; 217 if ((str = hasmntstr(&mnt, MNTTAB_OPT_GMTOFF)) != NULL) { 218 udf_args.gmtoff = a_num(str, MNTTAB_OPT_GMTOFF); 219 XFREE(str); 220 } 221#endif /* HAVE_UDF_ARGS_T_GMTOFF */ 222 223#ifdef HAVE_UDF_ARGS_T_SESSIONNR 224 udf_args.sessionnr = 0; 225 if ((str = hasmntstr(&mnt, MNTTAB_OPT_SESSIONNR)) != NULL) { 226 udf_args.sessionnr = a_num(str, MNTTAB_OPT_SESSIONNR); 227 XFREE(str); 228 } 229#endif /* HAVE_UDF_ARGS_T_SESSIONNR */ 230 231#ifdef HAVE_UDF_ARGS_T_VERSION 232# ifdef UDFMNT_VERSION 233 udf_args.version = UDFMNT_VERSION; 234# endif /* UDFMNT_VERSION */ 235#endif /* HAVE_UDF_ARGS_T_VERSION */ 236 237#ifdef HAVE_UDF_ARGS_T_FSPEC 238 udf_args.fspec = fs_name; 239#endif /* HAVE_UFS_ARGS_T_FSPEC */ 240 241 /* 242 * Call generic mount routine 243 */ 244 return mount_fs(&mnt, flags, (caddr_t)&udf_args, 0, type, 0, NULL, 245 mnttab_file_name, on_autofs); 246} 247 248static int 249udf_mount(am_node *am, mntfs *mf) 250{ 251 int on_autofs; 252 int error; 253 254 on_autofs = mf->mf_flags & MFF_ON_AUTOFS; 255 error = mount_udf(mf->mf_mount, mf->mf_info, mf->mf_mopts, on_autofs); 256 if (error) { 257 errno = error; 258 plog(XLOG_ERROR, "mount_udf: %m"); 259 return error; 260 } 261 return 0; 262} 263 264 265static int 266udf_umount(am_node *am, mntfs *mf) 267{ 268 int unmount_flags; 269 270 unmount_flags = (mf->mf_flags & MFF_ON_AUTOFS) ? AMU_UMOUNT_AUTOFS : 0; 271 return UMOUNT_FS(mf->mf_mount, mnttab_file_name, unmount_flags); 272} 273