Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 2 | /* |
Eric Andersen | 596e546 | 1999-10-07 08:30:23 +0000 | [diff] [blame] | 3 | * Mini mount implementation for busybox |
| 4 | * |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 5 | * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>. |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 6 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 7 | * Copyright (C) 2005-2006 by Rob Landley <rob@landley.net> |
Eric Andersen | 596e546 | 1999-10-07 08:30:23 +0000 | [diff] [blame] | 8 | * |
Rob Landley | 7b363fd | 2005-12-20 17:18:01 +0000 | [diff] [blame] | 9 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
Erik Andersen | b7cc49d | 2000-01-13 06:38:14 +0000 | [diff] [blame] | 10 | */ |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 11 | |
Rob Landley | 22d26fc | 2006-06-15 15:49:36 +0000 | [diff] [blame] | 12 | /* Design notes: There is no spec for mount. Remind me to write one. |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 13 | |
| 14 | mount_main() calls singlemount() which calls mount_it_now(). |
Eric Andersen | 9601a1c | 2006-03-20 18:07:50 +0000 | [diff] [blame] | 15 | |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 16 | mount_main() can loop through /etc/fstab for mount -a |
| 17 | singlemount() can loop through /etc/filesystems for fstype detection. |
| 18 | mount_it_now() does the actual mount. |
| 19 | */ |
| 20 | |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 21 | #include <mntent.h> |
Bernhard Reutner-Fischer | f470196 | 2008-01-27 12:50:12 +0000 | [diff] [blame] | 22 | #include <syslog.h> |
Denis Vlasenko | de7684a | 2008-02-18 21:08:49 +0000 | [diff] [blame] | 23 | #include "libbb.h" |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 24 | |
Denis Vlasenko | 6aa7696 | 2008-03-18 01:44:52 +0000 | [diff] [blame] | 25 | #if ENABLE_FEATURE_MOUNT_LABEL |
Denis Vlasenko | de7684a | 2008-02-18 21:08:49 +0000 | [diff] [blame] | 26 | /* For FEATURE_MOUNT_LABEL only */ |
| 27 | #include "volume_id.h" |
Denis Vlasenko | 6aa7696 | 2008-03-18 01:44:52 +0000 | [diff] [blame] | 28 | #endif |
Denis Vlasenko | de7684a | 2008-02-18 21:08:49 +0000 | [diff] [blame] | 29 | |
| 30 | /* Needed for nfs support only */ |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 31 | #include <sys/utsname.h> |
| 32 | #undef TRUE |
| 33 | #undef FALSE |
| 34 | #include <rpc/rpc.h> |
| 35 | #include <rpc/pmap_prot.h> |
| 36 | #include <rpc/pmap_clnt.h> |
| 37 | |
Denis Vlasenko | 2535f12 | 2007-09-15 13:28:30 +0000 | [diff] [blame] | 38 | #ifndef MS_SILENT |
| 39 | #define MS_SILENT (1 << 15) |
| 40 | #endif |
Denis Vlasenko | c9ca0a3 | 2008-02-18 11:08:33 +0000 | [diff] [blame] | 41 | /* Grab more as needed from util-linux's mount/mount_constants.h */ |
| 42 | #ifndef MS_DIRSYNC |
| 43 | #define MS_DIRSYNC 128 /* Directory modifications are synchronous */ |
| 44 | #endif |
| 45 | |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 46 | |
Denis Vlasenko | 908d6b7 | 2006-12-18 23:07:42 +0000 | [diff] [blame] | 47 | #if defined(__dietlibc__) |
| 48 | /* 16.12.2006, Sampo Kellomaki (sampo@iki.fi) |
| 49 | * dietlibc-0.30 does not have implementation of getmntent_r() */ |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 50 | static struct mntent *getmntent_r(FILE* stream, struct mntent* result, char* buffer, int bufsize) |
Denis Vlasenko | 908d6b7 | 2006-12-18 23:07:42 +0000 | [diff] [blame] | 51 | { |
Denis Vlasenko | 908d6b7 | 2006-12-18 23:07:42 +0000 | [diff] [blame] | 52 | struct mntent* ment = getmntent(stream); |
| 53 | memcpy(result, ment, sizeof(struct mntent)); |
| 54 | return result; |
| 55 | } |
| 56 | #endif |
| 57 | |
| 58 | |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 59 | // Not real flags, but we want to be able to check for this. |
Denis Vlasenko | 13c5a68 | 2006-10-16 22:39:51 +0000 | [diff] [blame] | 60 | enum { |
Denis Vlasenko | a4522c5 | 2008-03-17 08:46:43 +0000 | [diff] [blame] | 61 | MOUNT_USERS = (1 << 28) * ENABLE_DESKTOP, |
| 62 | MOUNT_NOAUTO = (1 << 29), |
| 63 | MOUNT_SWAP = (1 << 30), |
Denis Vlasenko | 13c5a68 | 2006-10-16 22:39:51 +0000 | [diff] [blame] | 64 | }; |
Denis Vlasenko | b1d8e7d | 2008-02-16 23:28:42 +0000 | [diff] [blame] | 65 | |
| 66 | |
| 67 | #define OPTION_STR "o:t:rwanfvsi" |
| 68 | enum { |
| 69 | OPT_o = (1 << 0), |
| 70 | OPT_t = (1 << 1), |
| 71 | OPT_r = (1 << 2), |
| 72 | OPT_w = (1 << 3), |
| 73 | OPT_a = (1 << 4), |
| 74 | OPT_n = (1 << 5), |
| 75 | OPT_f = (1 << 6), |
| 76 | OPT_v = (1 << 7), |
| 77 | OPT_s = (1 << 8), |
| 78 | OPT_i = (1 << 9), |
| 79 | }; |
| 80 | |
| 81 | #if ENABLE_FEATURE_MTAB_SUPPORT |
| 82 | #define useMtab (!(option_mask32 & OPT_n)) |
| 83 | #else |
| 84 | #define useMtab 0 |
| 85 | #endif |
| 86 | |
| 87 | #if ENABLE_FEATURE_MOUNT_FAKE |
| 88 | #define fakeIt (option_mask32 & OPT_f) |
| 89 | #else |
| 90 | #define fakeIt 0 |
| 91 | #endif |
| 92 | |
| 93 | |
Denis Vlasenko | 13c5a68 | 2006-10-16 22:39:51 +0000 | [diff] [blame] | 94 | // TODO: more "user" flag compatibility. |
| 95 | // "user" option (from mount manpage): |
| 96 | // Only the user that mounted a filesystem can unmount it again. |
| 97 | // If any user should be able to unmount, then use users instead of user |
| 98 | // in the fstab line. The owner option is similar to the user option, |
| 99 | // with the restriction that the user must be the owner of the special file. |
| 100 | // This may be useful e.g. for /dev/fd if a login script makes |
| 101 | // the console user owner of this device. |
Rob Landley | 3ba7bd1 | 2006-08-09 19:51:13 +0000 | [diff] [blame] | 102 | |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 103 | /* Standard mount options (from -o options or --options), with corresponding |
| 104 | * flags */ |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 105 | |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 106 | static const int32_t mount_options[] = { |
Rob Landley | e3781b7 | 2006-08-08 01:39:49 +0000 | [diff] [blame] | 107 | // MS_FLAGS set a bit. ~MS_FLAGS disable that bit. 0 flags are NOPs. |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 108 | |
Rob Landley | e3781b7 | 2006-08-08 01:39:49 +0000 | [diff] [blame] | 109 | USE_FEATURE_MOUNT_LOOP( |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 110 | /* "loop" */ 0, |
Rob Landley | e3781b7 | 2006-08-08 01:39:49 +0000 | [diff] [blame] | 111 | ) |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 112 | |
Rob Landley | e3781b7 | 2006-08-08 01:39:49 +0000 | [diff] [blame] | 113 | USE_FEATURE_MOUNT_FSTAB( |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 114 | /* "defaults" */ 0, |
| 115 | /* "quiet" 0 - do not filter out, vfat wants to see it */ |
| 116 | /* "noauto" */ MOUNT_NOAUTO, |
| 117 | /* "sw" */ MOUNT_SWAP, |
| 118 | /* "swap" */ MOUNT_SWAP, |
| 119 | USE_DESKTOP(/* "user" */ MOUNT_USERS,) |
| 120 | USE_DESKTOP(/* "users" */ MOUNT_USERS,) |
Denis Vlasenko | 8c638cb | 2008-01-29 09:31:09 +0000 | [diff] [blame] | 121 | /* "_netdev" */ 0, |
Rob Landley | e3781b7 | 2006-08-08 01:39:49 +0000 | [diff] [blame] | 122 | ) |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 123 | |
Rob Landley | e3781b7 | 2006-08-08 01:39:49 +0000 | [diff] [blame] | 124 | USE_FEATURE_MOUNT_FLAGS( |
| 125 | // vfs flags |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 126 | /* "nosuid" */ MS_NOSUID, |
| 127 | /* "suid" */ ~MS_NOSUID, |
| 128 | /* "dev" */ ~MS_NODEV, |
| 129 | /* "nodev" */ MS_NODEV, |
| 130 | /* "exec" */ ~MS_NOEXEC, |
| 131 | /* "noexec" */ MS_NOEXEC, |
| 132 | /* "sync" */ MS_SYNCHRONOUS, |
Denis Vlasenko | c9ca0a3 | 2008-02-18 11:08:33 +0000 | [diff] [blame] | 133 | /* "dirsync" */ MS_DIRSYNC, |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 134 | /* "async" */ ~MS_SYNCHRONOUS, |
| 135 | /* "atime" */ ~MS_NOATIME, |
| 136 | /* "noatime" */ MS_NOATIME, |
| 137 | /* "diratime" */ ~MS_NODIRATIME, |
| 138 | /* "nodiratime" */ MS_NODIRATIME, |
| 139 | /* "loud" */ ~MS_SILENT, |
Eric Andersen | 9601a1c | 2006-03-20 18:07:50 +0000 | [diff] [blame] | 140 | |
Rob Landley | e3781b7 | 2006-08-08 01:39:49 +0000 | [diff] [blame] | 141 | // action flags |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 142 | /* "bind" */ MS_BIND, |
| 143 | /* "move" */ MS_MOVE, |
| 144 | /* "shared" */ MS_SHARED, |
| 145 | /* "slave" */ MS_SLAVE, |
| 146 | /* "private" */ MS_PRIVATE, |
| 147 | /* "unbindable" */ MS_UNBINDABLE, |
| 148 | /* "rshared" */ MS_SHARED|MS_RECURSIVE, |
| 149 | /* "rslave" */ MS_SLAVE|MS_RECURSIVE, |
| 150 | /* "rprivate" */ MS_SLAVE|MS_RECURSIVE, |
| 151 | /* "runbindable" */ MS_UNBINDABLE|MS_RECURSIVE, |
Rob Landley | e3781b7 | 2006-08-08 01:39:49 +0000 | [diff] [blame] | 152 | ) |
| 153 | |
| 154 | // Always understood. |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 155 | /* "ro" */ MS_RDONLY, // vfs flag |
| 156 | /* "rw" */ ~MS_RDONLY, // vfs flag |
| 157 | /* "remount" */ MS_REMOUNT // action flag |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 158 | }; |
| 159 | |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 160 | static const char mount_option_str[] = |
| 161 | USE_FEATURE_MOUNT_LOOP( |
| 162 | "loop" "\0" |
| 163 | ) |
| 164 | USE_FEATURE_MOUNT_FSTAB( |
| 165 | "defaults" "\0" |
| 166 | /* "quiet" "\0" - do not filter out, vfat wants to see it */ |
| 167 | "noauto" "\0" |
| 168 | "sw" "\0" |
| 169 | "swap" "\0" |
| 170 | USE_DESKTOP("user" "\0") |
| 171 | USE_DESKTOP("users" "\0") |
Denis Vlasenko | 8c638cb | 2008-01-29 09:31:09 +0000 | [diff] [blame] | 172 | "_netdev" "\0" |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 173 | ) |
| 174 | USE_FEATURE_MOUNT_FLAGS( |
| 175 | // vfs flags |
| 176 | "nosuid" "\0" |
| 177 | "suid" "\0" |
| 178 | "dev" "\0" |
| 179 | "nodev" "\0" |
| 180 | "exec" "\0" |
| 181 | "noexec" "\0" |
| 182 | "sync" "\0" |
Denis Vlasenko | c9ca0a3 | 2008-02-18 11:08:33 +0000 | [diff] [blame] | 183 | "dirsync" "\0" |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 184 | "async" "\0" |
| 185 | "atime" "\0" |
| 186 | "noatime" "\0" |
| 187 | "diratime" "\0" |
| 188 | "nodiratime" "\0" |
| 189 | "loud" "\0" |
| 190 | |
| 191 | // action flags |
| 192 | "bind" "\0" |
| 193 | "move" "\0" |
| 194 | "shared" "\0" |
| 195 | "slave" "\0" |
| 196 | "private" "\0" |
| 197 | "unbindable" "\0" |
| 198 | "rshared" "\0" |
| 199 | "rslave" "\0" |
| 200 | "rprivate" "\0" |
| 201 | "runbindable" "\0" |
| 202 | ) |
| 203 | |
| 204 | // Always understood. |
| 205 | "ro" "\0" // vfs flag |
| 206 | "rw" "\0" // vfs flag |
| 207 | "remount" "\0" // action flag |
| 208 | ; |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 209 | |
Denis Vlasenko | f732e96 | 2008-02-18 12:07:49 +0000 | [diff] [blame] | 210 | |
| 211 | struct globals { |
| 212 | #if ENABLE_FEATURE_MOUNT_NFS |
| 213 | smalluint nfs_mount_version; |
| 214 | #endif |
| 215 | #if ENABLE_FEATURE_MOUNT_VERBOSE |
| 216 | unsigned verbose; |
| 217 | #endif |
| 218 | llist_t *fslist; |
Denis Vlasenko | d0a071a | 2008-03-17 09:33:45 +0000 | [diff] [blame] | 219 | char getmntent_buf[1]; |
Denis Vlasenko | f732e96 | 2008-02-18 12:07:49 +0000 | [diff] [blame] | 220 | |
| 221 | }; |
Denis Vlasenko | d0a071a | 2008-03-17 09:33:45 +0000 | [diff] [blame] | 222 | enum { GETMNTENT_BUFSIZE = COMMON_BUFSIZE - offsetof(struct globals, getmntent_buf) }; |
Denis Vlasenko | f732e96 | 2008-02-18 12:07:49 +0000 | [diff] [blame] | 223 | #define G (*(struct globals*)&bb_common_bufsiz1) |
| 224 | #define nfs_mount_version (G.nfs_mount_version) |
Denis Vlasenko | b413368 | 2008-02-18 13:05:38 +0000 | [diff] [blame] | 225 | #if ENABLE_FEATURE_MOUNT_VERBOSE |
Denis Vlasenko | f732e96 | 2008-02-18 12:07:49 +0000 | [diff] [blame] | 226 | #define verbose (G.verbose ) |
Denis Vlasenko | b413368 | 2008-02-18 13:05:38 +0000 | [diff] [blame] | 227 | #else |
| 228 | #define verbose 0 |
| 229 | #endif |
Denis Vlasenko | f732e96 | 2008-02-18 12:07:49 +0000 | [diff] [blame] | 230 | #define fslist (G.fslist ) |
| 231 | #define getmntent_buf (G.getmntent_buf ) |
| 232 | |
| 233 | |
| 234 | #if ENABLE_FEATURE_MOUNT_VERBOSE |
| 235 | static int verbose_mount(const char *source, const char *target, |
| 236 | const char *filesystemtype, |
| 237 | unsigned long mountflags, const void *data) |
| 238 | { |
| 239 | int rc; |
| 240 | |
| 241 | errno = 0; |
| 242 | rc = mount(source, target, filesystemtype, mountflags, data); |
| 243 | if (verbose >= 2) |
Denis Vlasenko | a4522c5 | 2008-03-17 08:46:43 +0000 | [diff] [blame] | 244 | bb_perror_msg("mount('%s','%s','%s',0x%08lx,'%s'):%d", |
Denis Vlasenko | b413368 | 2008-02-18 13:05:38 +0000 | [diff] [blame] | 245 | source, target, filesystemtype, |
| 246 | mountflags, (char*)data, rc); |
Denis Vlasenko | f732e96 | 2008-02-18 12:07:49 +0000 | [diff] [blame] | 247 | return rc; |
| 248 | } |
| 249 | #else |
| 250 | #define verbose_mount(...) mount(__VA_ARGS__) |
| 251 | #endif |
| 252 | |
Denis Vlasenko | de7684a | 2008-02-18 21:08:49 +0000 | [diff] [blame] | 253 | static int resolve_mount_spec(char **fsname) |
| 254 | { |
| 255 | char *tmp = NULL; |
| 256 | |
Denis Vlasenko | 6aa7696 | 2008-03-18 01:44:52 +0000 | [diff] [blame] | 257 | #if ENABLE_FEATURE_MOUNT_LABEL |
Denis Vlasenko | de7684a | 2008-02-18 21:08:49 +0000 | [diff] [blame] | 258 | if (!strncmp(*fsname, "UUID=", 5)) |
| 259 | tmp = get_devname_from_uuid(*fsname + 5); |
| 260 | else if (!strncmp(*fsname, "LABEL=", 6)) |
| 261 | tmp = get_devname_from_label(*fsname + 6); |
Denis Vlasenko | 6aa7696 | 2008-03-18 01:44:52 +0000 | [diff] [blame] | 262 | #endif |
Denis Vlasenko | de7684a | 2008-02-18 21:08:49 +0000 | [diff] [blame] | 263 | |
| 264 | if (tmp) { |
| 265 | *fsname = tmp; |
| 266 | return 1; |
| 267 | } |
| 268 | return 0; |
| 269 | } |
| 270 | |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 271 | /* Append mount options to string */ |
Denis Vlasenko | 06c0a71 | 2007-01-29 22:51:44 +0000 | [diff] [blame] | 272 | static void append_mount_options(char **oldopts, const char *newopts) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 273 | { |
Denis Vlasenko | 8d474b5 | 2006-09-17 15:00:58 +0000 | [diff] [blame] | 274 | if (*oldopts && **oldopts) { |
Denis Vlasenko | c889d2b | 2006-09-17 15:08:12 +0000 | [diff] [blame] | 275 | /* do not insert options which are already there */ |
| 276 | while (newopts[0]) { |
| 277 | char *p; |
| 278 | int len = strlen(newopts); |
| 279 | p = strchr(newopts, ','); |
| 280 | if (p) len = p - newopts; |
| 281 | p = *oldopts; |
| 282 | while (1) { |
Denis Vlasenko | 13c5a68 | 2006-10-16 22:39:51 +0000 | [diff] [blame] | 283 | if (!strncmp(p, newopts, len) |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 284 | && (p[len] == ',' || p[len] == '\0')) |
Denis Vlasenko | c889d2b | 2006-09-17 15:08:12 +0000 | [diff] [blame] | 285 | goto skip; |
| 286 | p = strchr(p,','); |
Denis Vlasenko | 51742f4 | 2007-04-12 00:32:05 +0000 | [diff] [blame] | 287 | if (!p) break; |
Denis Vlasenko | c889d2b | 2006-09-17 15:08:12 +0000 | [diff] [blame] | 288 | p++; |
| 289 | } |
| 290 | p = xasprintf("%s,%.*s", *oldopts, len, newopts); |
| 291 | free(*oldopts); |
| 292 | *oldopts = p; |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 293 | skip: |
Denis Vlasenko | c889d2b | 2006-09-17 15:08:12 +0000 | [diff] [blame] | 294 | newopts += len; |
| 295 | while (newopts[0] == ',') newopts++; |
| 296 | } |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 297 | } else { |
| 298 | if (ENABLE_FEATURE_CLEAN_UP) free(*oldopts); |
Rob Landley | d921b2e | 2006-08-03 15:41:12 +0000 | [diff] [blame] | 299 | *oldopts = xstrdup(newopts); |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 300 | } |
| 301 | } |
| 302 | |
| 303 | /* Use the mount_options list to parse options into flags. |
Denis Vlasenko | 00d7d6c | 2006-09-11 17:42:44 +0000 | [diff] [blame] | 304 | * Also return list of unrecognized options if unrecognized!=NULL */ |
Denis Vlasenko | b413368 | 2008-02-18 13:05:38 +0000 | [diff] [blame] | 305 | static long parse_mount_options(char *options, char **unrecognized) |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 306 | { |
Denis Vlasenko | b413368 | 2008-02-18 13:05:38 +0000 | [diff] [blame] | 307 | long flags = MS_SILENT; |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 308 | |
Rob Landley | 6a6798b | 2005-08-10 20:35:54 +0000 | [diff] [blame] | 309 | // Loop through options |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 310 | for (;;) { |
Rob Landley | 6a6798b | 2005-08-10 20:35:54 +0000 | [diff] [blame] | 311 | int i; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 312 | char *comma = strchr(options, ','); |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 313 | const char *option_str = mount_option_str; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 314 | |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 315 | if (comma) *comma = '\0'; |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 316 | |
Rob Landley | 6a6798b | 2005-08-10 20:35:54 +0000 | [diff] [blame] | 317 | // Find this option in mount_options |
Denis Vlasenko | 80b8b39 | 2007-06-25 10:55:35 +0000 | [diff] [blame] | 318 | for (i = 0; i < ARRAY_SIZE(mount_options); i++) { |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 319 | if (!strcasecmp(option_str, options)) { |
| 320 | long fl = mount_options[i]; |
Denis Vlasenko | 8d474b5 | 2006-09-17 15:00:58 +0000 | [diff] [blame] | 321 | if (fl < 0) flags &= fl; |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 322 | else flags |= fl; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 323 | break; |
| 324 | } |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 325 | option_str += strlen(option_str) + 1; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 326 | } |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 327 | // If unrecognized not NULL, append unrecognized mount options */ |
Denis Vlasenko | 80b8b39 | 2007-06-25 10:55:35 +0000 | [diff] [blame] | 328 | if (unrecognized && i == ARRAY_SIZE(mount_options)) { |
Rob Landley | 6a6798b | 2005-08-10 20:35:54 +0000 | [diff] [blame] | 329 | // Add it to strflags, to pass on to kernel |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 330 | i = *unrecognized ? strlen(*unrecognized) : 0; |
| 331 | *unrecognized = xrealloc(*unrecognized, i+strlen(options)+2); |
Eric Andersen | 9601a1c | 2006-03-20 18:07:50 +0000 | [diff] [blame] | 332 | |
Rob Landley | 6a6798b | 2005-08-10 20:35:54 +0000 | [diff] [blame] | 333 | // Comma separated if it's not the first one |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 334 | if (i) (*unrecognized)[i++] = ','; |
| 335 | strcpy((*unrecognized)+i, options); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 336 | } |
Eric Andersen | 9601a1c | 2006-03-20 18:07:50 +0000 | [diff] [blame] | 337 | |
Denis Vlasenko | 2535f12 | 2007-09-15 13:28:30 +0000 | [diff] [blame] | 338 | if (!comma) |
| 339 | break; |
| 340 | // Advance to next option |
| 341 | *comma = ','; |
| 342 | options = ++comma; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 343 | } |
Eric Andersen | 9601a1c | 2006-03-20 18:07:50 +0000 | [diff] [blame] | 344 | |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 345 | return flags; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 346 | } |
| 347 | |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 348 | // Return a list of all block device backed filesystems |
Matt Kraai | 1240082 | 2001-04-17 04:32:50 +0000 | [diff] [blame] | 349 | |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 350 | static llist_t *get_block_backed_filesystems(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 351 | { |
Denis Vlasenko | 8746885 | 2007-04-13 23:22:00 +0000 | [diff] [blame] | 352 | static const char filesystems[2][sizeof("/proc/filesystems")] = { |
Denis Vlasenko | 372686b | 2006-10-12 22:42:33 +0000 | [diff] [blame] | 353 | "/etc/filesystems", |
| 354 | "/proc/filesystems", |
Denis Vlasenko | 372686b | 2006-10-12 22:42:33 +0000 | [diff] [blame] | 355 | }; |
| 356 | char *fs, *buf; |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 357 | llist_t *list = 0; |
| 358 | int i; |
| 359 | FILE *f; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 360 | |
Denis Vlasenko | 8746885 | 2007-04-13 23:22:00 +0000 | [diff] [blame] | 361 | for (i = 0; i < 2; i++) { |
Denis Vlasenko | 8d474b5 | 2006-09-17 15:00:58 +0000 | [diff] [blame] | 362 | f = fopen(filesystems[i], "r"); |
| 363 | if (!f) continue; |
Eric Andersen | 9601a1c | 2006-03-20 18:07:50 +0000 | [diff] [blame] | 364 | |
Denis Vlasenko | 8ee649a | 2008-03-26 20:04:27 +0000 | [diff] [blame^] | 365 | while ((buf = xmalloc_fgetline(f)) != NULL) { |
Denis Vlasenko | 372686b | 2006-10-12 22:42:33 +0000 | [diff] [blame] | 366 | if (!strncmp(buf, "nodev", 5) && isspace(buf[5])) |
| 367 | continue; |
Denis Vlasenko | d18a3a2 | 2006-10-25 12:46:03 +0000 | [diff] [blame] | 368 | fs = skip_whitespace(buf); |
Denis Vlasenko | 372686b | 2006-10-12 22:42:33 +0000 | [diff] [blame] | 369 | if (*fs=='#' || *fs=='*' || !*fs) continue; |
Eric Andersen | 9601a1c | 2006-03-20 18:07:50 +0000 | [diff] [blame] | 370 | |
Denis Vlasenko | 372686b | 2006-10-12 22:42:33 +0000 | [diff] [blame] | 371 | llist_add_to_end(&list, xstrdup(fs)); |
| 372 | free(buf); |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 373 | } |
| 374 | if (ENABLE_FEATURE_CLEAN_UP) fclose(f); |
| 375 | } |
| 376 | |
| 377 | return list; |
| 378 | } |
| 379 | |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 380 | #if ENABLE_FEATURE_CLEAN_UP |
| 381 | static void delete_block_backed_filesystems(void) |
| 382 | { |
Rob Landley | a6b5b60 | 2006-05-08 19:03:07 +0000 | [diff] [blame] | 383 | llist_free(fslist, free); |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 384 | } |
Rob Landley | fe908fd | 2006-03-29 14:30:49 +0000 | [diff] [blame] | 385 | #else |
| 386 | void delete_block_backed_filesystems(void); |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 387 | #endif |
| 388 | |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 389 | // Perform actual mount of specific filesystem at specific location. |
Denis Vlasenko | 8d474b5 | 2006-09-17 15:00:58 +0000 | [diff] [blame] | 390 | // NB: mp->xxx fields may be trashed on exit |
Denis Vlasenko | b413368 | 2008-02-18 13:05:38 +0000 | [diff] [blame] | 391 | static int mount_it_now(struct mntent *mp, long vfsflags, char *filteropts) |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 392 | { |
Denis Vlasenko | b172678 | 2006-09-29 14:43:20 +0000 | [diff] [blame] | 393 | int rc = 0; |
Rob Landley | eaa34ca | 2006-03-18 02:58:11 +0000 | [diff] [blame] | 394 | |
Denis Vlasenko | b413368 | 2008-02-18 13:05:38 +0000 | [diff] [blame] | 395 | if (fakeIt) { |
| 396 | if (verbose >= 2) |
| 397 | bb_error_msg("would do mount('%s','%s','%s',0x%08lx,'%s')", |
| 398 | mp->mnt_fsname, mp->mnt_dir, mp->mnt_type, |
| 399 | vfsflags, filteropts); |
| 400 | goto mtab; |
| 401 | } |
Eric Andersen | 19b5b8f | 2006-03-20 18:07:13 +0000 | [diff] [blame] | 402 | |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 403 | // Mount, with fallback to read-only if necessary. |
Denis Vlasenko | 8d474b5 | 2006-09-17 15:00:58 +0000 | [diff] [blame] | 404 | for (;;) { |
Denis Vlasenko | f732e96 | 2008-02-18 12:07:49 +0000 | [diff] [blame] | 405 | errno = 0; |
| 406 | rc = verbose_mount(mp->mnt_fsname, mp->mnt_dir, mp->mnt_type, |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 407 | vfsflags, filteropts); |
Denis Vlasenko | 32d49bc | 2008-02-03 23:52:41 +0000 | [diff] [blame] | 408 | |
| 409 | // If mount failed, try |
| 410 | // helper program <mnt_type> |
| 411 | if (ENABLE_FEATURE_MOUNT_HELPERS && rc) { |
| 412 | char *args[6]; |
| 413 | int errno_save = errno; |
Denis Vlasenko | a4522c5 | 2008-03-17 08:46:43 +0000 | [diff] [blame] | 414 | args[0] = xasprintf("mount.%s", mp->mnt_type); |
Denis Vlasenko | 32d49bc | 2008-02-03 23:52:41 +0000 | [diff] [blame] | 415 | rc = 1; |
| 416 | if (filteropts) { |
| 417 | args[rc++] = (char *)"-o"; |
| 418 | args[rc++] = filteropts; |
| 419 | } |
| 420 | args[rc++] = mp->mnt_fsname; |
| 421 | args[rc++] = mp->mnt_dir; |
| 422 | args[rc] = NULL; |
| 423 | rc = wait4pid(spawn(args)); |
Denis Vlasenko | a4522c5 | 2008-03-17 08:46:43 +0000 | [diff] [blame] | 424 | free(args[0]); |
Denis Vlasenko | 32d49bc | 2008-02-03 23:52:41 +0000 | [diff] [blame] | 425 | if (!rc) |
| 426 | break; |
| 427 | errno = errno_save; |
| 428 | } |
| 429 | |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 430 | if (!rc || (vfsflags & MS_RDONLY) || (errno != EACCES && errno != EROFS)) |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 431 | break; |
Denis Vlasenko | 2535f12 | 2007-09-15 13:28:30 +0000 | [diff] [blame] | 432 | if (!(vfsflags & MS_SILENT)) |
| 433 | bb_error_msg("%s is write-protected, mounting read-only", |
| 434 | mp->mnt_fsname); |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 435 | vfsflags |= MS_RDONLY; |
| 436 | } |
| 437 | |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 438 | // Abort entirely if permission denied. |
| 439 | |
| 440 | if (rc && errno == EPERM) |
| 441 | bb_error_msg_and_die(bb_msg_perm_denied_are_you_root); |
| 442 | |
| 443 | /* If the mount was successful, and we're maintaining an old-style |
| 444 | * mtab file by hand, add the new entry to it now. */ |
Denis Vlasenko | 6a353c8 | 2006-11-19 17:34:57 +0000 | [diff] [blame] | 445 | mtab: |
Denis Vlasenko | b1d8e7d | 2008-02-16 23:28:42 +0000 | [diff] [blame] | 446 | if (useMtab && !rc && !(vfsflags & MS_REMOUNT)) { |
Denis Vlasenko | a52145a | 2006-09-17 15:09:48 +0000 | [diff] [blame] | 447 | char *fsname; |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 448 | FILE *mountTable = setmntent(bb_path_mtab_file, "a+"); |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 449 | const char *option_str = mount_option_str; |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 450 | int i; |
| 451 | |
Denis Vlasenko | 6a353c8 | 2006-11-19 17:34:57 +0000 | [diff] [blame] | 452 | if (!mountTable) { |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 453 | bb_error_msg("no %s", bb_path_mtab_file); |
Denis Vlasenko | 6a353c8 | 2006-11-19 17:34:57 +0000 | [diff] [blame] | 454 | goto ret; |
| 455 | } |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 456 | |
| 457 | // Add vfs string flags |
| 458 | |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 459 | for (i = 0; mount_options[i] != MS_REMOUNT; i++) { |
| 460 | if (mount_options[i] > 0 && (mount_options[i] & vfsflags)) |
| 461 | append_mount_options(&(mp->mnt_opts), option_str); |
| 462 | option_str += strlen(option_str) + 1; |
| 463 | } |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 464 | |
| 465 | // Remove trailing / (if any) from directory we mounted on |
| 466 | |
Denis Vlasenko | 727ef94 | 2006-09-14 13:19:19 +0000 | [diff] [blame] | 467 | i = strlen(mp->mnt_dir) - 1; |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 468 | if (i > 0 && mp->mnt_dir[i] == '/') mp->mnt_dir[i] = '\0'; |
Denis Vlasenko | 727ef94 | 2006-09-14 13:19:19 +0000 | [diff] [blame] | 469 | |
Denis Vlasenko | fc56dd2 | 2006-09-17 15:01:53 +0000 | [diff] [blame] | 470 | // Convert to canonical pathnames as needed |
Denis Vlasenko | 727ef94 | 2006-09-14 13:19:19 +0000 | [diff] [blame] | 471 | |
Denis Vlasenko | a52145a | 2006-09-17 15:09:48 +0000 | [diff] [blame] | 472 | mp->mnt_dir = bb_simplify_path(mp->mnt_dir); |
Denis Vlasenko | fc56dd2 | 2006-09-17 15:01:53 +0000 | [diff] [blame] | 473 | fsname = 0; |
Denis Vlasenko | 727ef94 | 2006-09-14 13:19:19 +0000 | [diff] [blame] | 474 | if (!mp->mnt_type || !*mp->mnt_type) { /* bind mount */ |
Denis Vlasenko | fc56dd2 | 2006-09-17 15:01:53 +0000 | [diff] [blame] | 475 | mp->mnt_fsname = fsname = bb_simplify_path(mp->mnt_fsname); |
Denis Vlasenko | 06c0a71 | 2007-01-29 22:51:44 +0000 | [diff] [blame] | 476 | mp->mnt_type = (char*)"bind"; |
Denis Vlasenko | 727ef94 | 2006-09-14 13:19:19 +0000 | [diff] [blame] | 477 | } |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 478 | mp->mnt_freq = mp->mnt_passno = 0; |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 479 | |
| 480 | // Write and close. |
| 481 | |
Denis Vlasenko | 727ef94 | 2006-09-14 13:19:19 +0000 | [diff] [blame] | 482 | addmntent(mountTable, mp); |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 483 | endmntent(mountTable); |
Denis Vlasenko | fc56dd2 | 2006-09-17 15:01:53 +0000 | [diff] [blame] | 484 | if (ENABLE_FEATURE_CLEAN_UP) { |
Denis Vlasenko | a52145a | 2006-09-17 15:09:48 +0000 | [diff] [blame] | 485 | free(mp->mnt_dir); |
Denis Vlasenko | fc56dd2 | 2006-09-17 15:01:53 +0000 | [diff] [blame] | 486 | free(fsname); |
| 487 | } |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 488 | } |
Denis Vlasenko | 6a353c8 | 2006-11-19 17:34:57 +0000 | [diff] [blame] | 489 | ret: |
Rob Landley | dc0955b | 2006-03-14 18:16:25 +0000 | [diff] [blame] | 490 | return rc; |
| 491 | } |
| 492 | |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 493 | #if ENABLE_FEATURE_MOUNT_NFS |
| 494 | |
| 495 | /* |
| 496 | * Linux NFS mount |
| 497 | * Copyright (C) 1993 Rick Sladkey <jrs@world.std.com> |
| 498 | * |
| 499 | * Licensed under GPLv2, see file LICENSE in this tarball for details. |
| 500 | * |
| 501 | * Wed Feb 8 12:51:48 1995, biro@yggdrasil.com (Ross Biro): allow all port |
| 502 | * numbers to be specified on the command line. |
| 503 | * |
| 504 | * Fri, 8 Mar 1996 18:01:39, Swen Thuemmler <swen@uni-paderborn.de>: |
| 505 | * Omit the call to connect() for Linux version 1.3.11 or later. |
| 506 | * |
| 507 | * Wed Oct 1 23:55:28 1997: Dick Streefland <dick_streefland@tasking.com> |
| 508 | * Implemented the "bg", "fg" and "retry" mount options for NFS. |
| 509 | * |
Denis Vlasenko | b44c790 | 2008-03-17 09:29:43 +0000 | [diff] [blame] | 510 | * 1999-02-22 Arkadiusz Mickiewicz <misiek@misiek.eu.org> |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 511 | * - added Native Language Support |
| 512 | * |
| 513 | * Modified by Olaf Kirch and Trond Myklebust for new NFS code, |
| 514 | * plus NFSv3 stuff. |
| 515 | */ |
| 516 | |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 517 | /* This is just a warning of a common mistake. Possibly this should be a |
| 518 | * uclibc faq entry rather than in busybox... */ |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 519 | #if defined(__UCLIBC__) && ! defined(__UCLIBC_HAS_RPC__) |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 520 | #error "You need to build uClibc with UCLIBC_HAS_RPC for NFS support." |
| 521 | #endif |
| 522 | |
| 523 | #define MOUNTPORT 635 |
| 524 | #define MNTPATHLEN 1024 |
| 525 | #define MNTNAMLEN 255 |
| 526 | #define FHSIZE 32 |
| 527 | #define FHSIZE3 64 |
| 528 | |
| 529 | typedef char fhandle[FHSIZE]; |
| 530 | |
| 531 | typedef struct { |
| 532 | unsigned int fhandle3_len; |
| 533 | char *fhandle3_val; |
| 534 | } fhandle3; |
| 535 | |
| 536 | enum mountstat3 { |
| 537 | MNT_OK = 0, |
| 538 | MNT3ERR_PERM = 1, |
| 539 | MNT3ERR_NOENT = 2, |
| 540 | MNT3ERR_IO = 5, |
| 541 | MNT3ERR_ACCES = 13, |
| 542 | MNT3ERR_NOTDIR = 20, |
| 543 | MNT3ERR_INVAL = 22, |
| 544 | MNT3ERR_NAMETOOLONG = 63, |
| 545 | MNT3ERR_NOTSUPP = 10004, |
| 546 | MNT3ERR_SERVERFAULT = 10006, |
| 547 | }; |
| 548 | typedef enum mountstat3 mountstat3; |
| 549 | |
| 550 | struct fhstatus { |
| 551 | unsigned int fhs_status; |
| 552 | union { |
| 553 | fhandle fhs_fhandle; |
| 554 | } fhstatus_u; |
| 555 | }; |
| 556 | typedef struct fhstatus fhstatus; |
| 557 | |
| 558 | struct mountres3_ok { |
| 559 | fhandle3 fhandle; |
| 560 | struct { |
| 561 | unsigned int auth_flavours_len; |
| 562 | char *auth_flavours_val; |
| 563 | } auth_flavours; |
| 564 | }; |
| 565 | typedef struct mountres3_ok mountres3_ok; |
| 566 | |
| 567 | struct mountres3 { |
| 568 | mountstat3 fhs_status; |
| 569 | union { |
| 570 | mountres3_ok mountinfo; |
| 571 | } mountres3_u; |
| 572 | }; |
| 573 | typedef struct mountres3 mountres3; |
| 574 | |
| 575 | typedef char *dirpath; |
| 576 | |
| 577 | typedef char *name; |
| 578 | |
| 579 | typedef struct mountbody *mountlist; |
| 580 | |
| 581 | struct mountbody { |
| 582 | name ml_hostname; |
| 583 | dirpath ml_directory; |
| 584 | mountlist ml_next; |
| 585 | }; |
| 586 | typedef struct mountbody mountbody; |
| 587 | |
| 588 | typedef struct groupnode *groups; |
| 589 | |
| 590 | struct groupnode { |
| 591 | name gr_name; |
| 592 | groups gr_next; |
| 593 | }; |
| 594 | typedef struct groupnode groupnode; |
| 595 | |
| 596 | typedef struct exportnode *exports; |
| 597 | |
| 598 | struct exportnode { |
| 599 | dirpath ex_dir; |
| 600 | groups ex_groups; |
| 601 | exports ex_next; |
| 602 | }; |
| 603 | typedef struct exportnode exportnode; |
| 604 | |
| 605 | struct ppathcnf { |
| 606 | int pc_link_max; |
| 607 | short pc_max_canon; |
| 608 | short pc_max_input; |
| 609 | short pc_name_max; |
| 610 | short pc_path_max; |
| 611 | short pc_pipe_buf; |
Denis Vlasenko | 2870301 | 2006-12-19 20:32:02 +0000 | [diff] [blame] | 612 | uint8_t pc_vdisable; |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 613 | char pc_xxx; |
| 614 | short pc_mask[2]; |
| 615 | }; |
| 616 | typedef struct ppathcnf ppathcnf; |
| 617 | |
| 618 | #define MOUNTPROG 100005 |
| 619 | #define MOUNTVERS 1 |
| 620 | |
| 621 | #define MOUNTPROC_NULL 0 |
| 622 | #define MOUNTPROC_MNT 1 |
| 623 | #define MOUNTPROC_DUMP 2 |
| 624 | #define MOUNTPROC_UMNT 3 |
| 625 | #define MOUNTPROC_UMNTALL 4 |
| 626 | #define MOUNTPROC_EXPORT 5 |
| 627 | #define MOUNTPROC_EXPORTALL 6 |
| 628 | |
| 629 | #define MOUNTVERS_POSIX 2 |
| 630 | |
| 631 | #define MOUNTPROC_PATHCONF 7 |
| 632 | |
| 633 | #define MOUNT_V3 3 |
| 634 | |
| 635 | #define MOUNTPROC3_NULL 0 |
| 636 | #define MOUNTPROC3_MNT 1 |
| 637 | #define MOUNTPROC3_DUMP 2 |
| 638 | #define MOUNTPROC3_UMNT 3 |
| 639 | #define MOUNTPROC3_UMNTALL 4 |
| 640 | #define MOUNTPROC3_EXPORT 5 |
| 641 | |
| 642 | enum { |
| 643 | #ifndef NFS_FHSIZE |
| 644 | NFS_FHSIZE = 32, |
| 645 | #endif |
| 646 | #ifndef NFS_PORT |
| 647 | NFS_PORT = 2049 |
| 648 | #endif |
| 649 | }; |
| 650 | |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 651 | /* |
| 652 | * We want to be able to compile mount on old kernels in such a way |
| 653 | * that the binary will work well on more recent kernels. |
| 654 | * Thus, if necessary we teach nfsmount.c the structure of new fields |
| 655 | * that will come later. |
| 656 | * |
| 657 | * Moreover, the new kernel includes conflict with glibc includes |
| 658 | * so it is easiest to ignore the kernel altogether (at compile time). |
| 659 | */ |
| 660 | |
| 661 | struct nfs2_fh { |
| 662 | char data[32]; |
| 663 | }; |
| 664 | struct nfs3_fh { |
| 665 | unsigned short size; |
| 666 | unsigned char data[64]; |
| 667 | }; |
| 668 | |
| 669 | struct nfs_mount_data { |
| 670 | int version; /* 1 */ |
| 671 | int fd; /* 1 */ |
| 672 | struct nfs2_fh old_root; /* 1 */ |
| 673 | int flags; /* 1 */ |
| 674 | int rsize; /* 1 */ |
| 675 | int wsize; /* 1 */ |
| 676 | int timeo; /* 1 */ |
| 677 | int retrans; /* 1 */ |
| 678 | int acregmin; /* 1 */ |
| 679 | int acregmax; /* 1 */ |
| 680 | int acdirmin; /* 1 */ |
| 681 | int acdirmax; /* 1 */ |
| 682 | struct sockaddr_in addr; /* 1 */ |
| 683 | char hostname[256]; /* 1 */ |
| 684 | int namlen; /* 2 */ |
| 685 | unsigned int bsize; /* 3 */ |
| 686 | struct nfs3_fh root; /* 4 */ |
| 687 | }; |
| 688 | |
| 689 | /* bits in the flags field */ |
| 690 | enum { |
| 691 | NFS_MOUNT_SOFT = 0x0001, /* 1 */ |
| 692 | NFS_MOUNT_INTR = 0x0002, /* 1 */ |
| 693 | NFS_MOUNT_SECURE = 0x0004, /* 1 */ |
| 694 | NFS_MOUNT_POSIX = 0x0008, /* 1 */ |
| 695 | NFS_MOUNT_NOCTO = 0x0010, /* 1 */ |
| 696 | NFS_MOUNT_NOAC = 0x0020, /* 1 */ |
| 697 | NFS_MOUNT_TCP = 0x0040, /* 2 */ |
| 698 | NFS_MOUNT_VER3 = 0x0080, /* 3 */ |
| 699 | NFS_MOUNT_KERBEROS = 0x0100, /* 3 */ |
| 700 | NFS_MOUNT_NONLM = 0x0200 /* 3 */ |
| 701 | }; |
| 702 | |
| 703 | |
| 704 | /* |
| 705 | * We need to translate between nfs status return values and |
| 706 | * the local errno values which may not be the same. |
| 707 | * |
| 708 | * Andreas Schwab <schwab@LS5.informatik.uni-dortmund.de>: change errno: |
| 709 | * "after #include <errno.h> the symbol errno is reserved for any use, |
| 710 | * it cannot even be used as a struct tag or field name". |
| 711 | */ |
| 712 | |
| 713 | #ifndef EDQUOT |
| 714 | #define EDQUOT ENOSPC |
| 715 | #endif |
| 716 | |
| 717 | // Convert each NFSERR_BLAH into EBLAH |
| 718 | |
| 719 | static const struct { |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 720 | short stat; |
| 721 | short errnum; |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 722 | } nfs_errtbl[] = { |
| 723 | {0,0}, {1,EPERM}, {2,ENOENT}, {5,EIO}, {6,ENXIO}, {13,EACCES}, {17,EEXIST}, |
| 724 | {19,ENODEV}, {20,ENOTDIR}, {21,EISDIR}, {22,EINVAL}, {27,EFBIG}, |
| 725 | {28,ENOSPC}, {30,EROFS}, {63,ENAMETOOLONG}, {66,ENOTEMPTY}, {69,EDQUOT}, |
| 726 | {70,ESTALE}, {71,EREMOTE}, {-1,EIO} |
| 727 | }; |
| 728 | |
| 729 | static char *nfs_strerror(int status) |
| 730 | { |
| 731 | int i; |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 732 | |
| 733 | for (i = 0; nfs_errtbl[i].stat != -1; i++) { |
| 734 | if (nfs_errtbl[i].stat == status) |
| 735 | return strerror(nfs_errtbl[i].errnum); |
| 736 | } |
Denis Vlasenko | b925605 | 2007-09-28 10:29:17 +0000 | [diff] [blame] | 737 | return xasprintf("unknown nfs status return value: %d", status); |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 738 | } |
| 739 | |
| 740 | static bool_t xdr_fhandle(XDR *xdrs, fhandle objp) |
| 741 | { |
| 742 | if (!xdr_opaque(xdrs, objp, FHSIZE)) |
| 743 | return FALSE; |
| 744 | return TRUE; |
| 745 | } |
| 746 | |
| 747 | static bool_t xdr_fhstatus(XDR *xdrs, fhstatus *objp) |
| 748 | { |
| 749 | if (!xdr_u_int(xdrs, &objp->fhs_status)) |
| 750 | return FALSE; |
| 751 | switch (objp->fhs_status) { |
| 752 | case 0: |
| 753 | if (!xdr_fhandle(xdrs, objp->fhstatus_u.fhs_fhandle)) |
| 754 | return FALSE; |
| 755 | break; |
| 756 | default: |
| 757 | break; |
| 758 | } |
| 759 | return TRUE; |
| 760 | } |
| 761 | |
| 762 | static bool_t xdr_dirpath(XDR *xdrs, dirpath *objp) |
| 763 | { |
| 764 | if (!xdr_string(xdrs, objp, MNTPATHLEN)) |
| 765 | return FALSE; |
| 766 | return TRUE; |
| 767 | } |
| 768 | |
| 769 | static bool_t xdr_fhandle3(XDR *xdrs, fhandle3 *objp) |
| 770 | { |
| 771 | if (!xdr_bytes(xdrs, (char **)&objp->fhandle3_val, (unsigned int *) &objp->fhandle3_len, FHSIZE3)) |
| 772 | return FALSE; |
| 773 | return TRUE; |
| 774 | } |
| 775 | |
| 776 | static bool_t xdr_mountres3_ok(XDR *xdrs, mountres3_ok *objp) |
| 777 | { |
| 778 | if (!xdr_fhandle3(xdrs, &objp->fhandle)) |
| 779 | return FALSE; |
| 780 | if (!xdr_array(xdrs, &(objp->auth_flavours.auth_flavours_val), &(objp->auth_flavours.auth_flavours_len), ~0, |
| 781 | sizeof (int), (xdrproc_t) xdr_int)) |
| 782 | return FALSE; |
| 783 | return TRUE; |
| 784 | } |
| 785 | |
| 786 | static bool_t xdr_mountstat3(XDR *xdrs, mountstat3 *objp) |
| 787 | { |
| 788 | if (!xdr_enum(xdrs, (enum_t *) objp)) |
| 789 | return FALSE; |
| 790 | return TRUE; |
| 791 | } |
| 792 | |
| 793 | static bool_t xdr_mountres3(XDR *xdrs, mountres3 *objp) |
| 794 | { |
| 795 | if (!xdr_mountstat3(xdrs, &objp->fhs_status)) |
| 796 | return FALSE; |
| 797 | switch (objp->fhs_status) { |
| 798 | case MNT_OK: |
| 799 | if (!xdr_mountres3_ok(xdrs, &objp->mountres3_u.mountinfo)) |
| 800 | return FALSE; |
| 801 | break; |
| 802 | default: |
| 803 | break; |
| 804 | } |
| 805 | return TRUE; |
| 806 | } |
| 807 | |
| 808 | #define MAX_NFSPROT ((nfs_mount_version >= 4) ? 3 : 2) |
| 809 | |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 810 | /* |
| 811 | * Unfortunately, the kernel prints annoying console messages |
| 812 | * in case of an unexpected nfs mount version (instead of |
| 813 | * just returning some error). Therefore we'll have to try |
| 814 | * and figure out what version the kernel expects. |
| 815 | * |
| 816 | * Variables: |
| 817 | * KERNEL_NFS_MOUNT_VERSION: kernel sources at compile time |
| 818 | * NFS_MOUNT_VERSION: these nfsmount sources at compile time |
| 819 | * nfs_mount_version: version this source and running kernel can handle |
| 820 | */ |
| 821 | static void |
| 822 | find_kernel_nfs_mount_version(void) |
| 823 | { |
Denis Vlasenko | b925605 | 2007-09-28 10:29:17 +0000 | [diff] [blame] | 824 | int kernel_version; |
| 825 | |
| 826 | if (nfs_mount_version) |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 827 | return; |
| 828 | |
| 829 | nfs_mount_version = 4; /* default */ |
| 830 | |
| 831 | kernel_version = get_linux_version_code(); |
| 832 | if (kernel_version) { |
| 833 | if (kernel_version < KERNEL_VERSION(2,1,32)) |
| 834 | nfs_mount_version = 1; |
| 835 | else if (kernel_version < KERNEL_VERSION(2,2,18) || |
| 836 | (kernel_version >= KERNEL_VERSION(2,3,0) && |
| 837 | kernel_version < KERNEL_VERSION(2,3,99))) |
| 838 | nfs_mount_version = 3; |
| 839 | /* else v4 since 2.3.99pre4 */ |
| 840 | } |
| 841 | } |
| 842 | |
Denis Vlasenko | 3f5fdc7 | 2007-10-14 04:55:59 +0000 | [diff] [blame] | 843 | static void |
Denis Vlasenko | b925605 | 2007-09-28 10:29:17 +0000 | [diff] [blame] | 844 | get_mountport(struct pmap *pm_mnt, |
| 845 | struct sockaddr_in *server_addr, |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 846 | long unsigned prog, |
| 847 | long unsigned version, |
| 848 | long unsigned proto, |
| 849 | long unsigned port) |
| 850 | { |
| 851 | struct pmaplist *pmap; |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 852 | |
| 853 | server_addr->sin_port = PMAPPORT; |
Denis Vlasenko | 5870ad9 | 2007-02-04 02:39:55 +0000 | [diff] [blame] | 854 | /* glibc 2.4 (still) has pmap_getmaps(struct sockaddr_in *). |
| 855 | * I understand it like "IPv6 for this is not 100% ready" */ |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 856 | pmap = pmap_getmaps(server_addr); |
| 857 | |
| 858 | if (version > MAX_NFSPROT) |
| 859 | version = MAX_NFSPROT; |
| 860 | if (!prog) |
| 861 | prog = MOUNTPROG; |
Denis Vlasenko | b925605 | 2007-09-28 10:29:17 +0000 | [diff] [blame] | 862 | pm_mnt->pm_prog = prog; |
| 863 | pm_mnt->pm_vers = version; |
| 864 | pm_mnt->pm_prot = proto; |
| 865 | pm_mnt->pm_port = port; |
Denis Vlasenko | 9213a9e | 2006-09-17 16:28:10 +0000 | [diff] [blame] | 866 | |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 867 | while (pmap) { |
| 868 | if (pmap->pml_map.pm_prog != prog) |
| 869 | goto next; |
Denis Vlasenko | b925605 | 2007-09-28 10:29:17 +0000 | [diff] [blame] | 870 | if (!version && pm_mnt->pm_vers > pmap->pml_map.pm_vers) |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 871 | goto next; |
| 872 | if (version > 2 && pmap->pml_map.pm_vers != version) |
| 873 | goto next; |
| 874 | if (version && version <= 2 && pmap->pml_map.pm_vers > 2) |
| 875 | goto next; |
| 876 | if (pmap->pml_map.pm_vers > MAX_NFSPROT || |
Denis Vlasenko | b925605 | 2007-09-28 10:29:17 +0000 | [diff] [blame] | 877 | (proto && pm_mnt->pm_prot && pmap->pml_map.pm_prot != proto) || |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 878 | (port && pmap->pml_map.pm_port != port)) |
| 879 | goto next; |
Denis Vlasenko | b925605 | 2007-09-28 10:29:17 +0000 | [diff] [blame] | 880 | memcpy(pm_mnt, &pmap->pml_map, sizeof(*pm_mnt)); |
| 881 | next: |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 882 | pmap = pmap->pml_next; |
| 883 | } |
Denis Vlasenko | b925605 | 2007-09-28 10:29:17 +0000 | [diff] [blame] | 884 | if (!pm_mnt->pm_vers) |
| 885 | pm_mnt->pm_vers = MOUNTVERS; |
| 886 | if (!pm_mnt->pm_port) |
| 887 | pm_mnt->pm_port = MOUNTPORT; |
| 888 | if (!pm_mnt->pm_prot) |
| 889 | pm_mnt->pm_prot = IPPROTO_TCP; |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 890 | } |
| 891 | |
Denis Vlasenko | f000065 | 2007-09-04 18:30:26 +0000 | [diff] [blame] | 892 | #if BB_MMU |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 893 | static int daemonize(void) |
| 894 | { |
| 895 | int fd; |
| 896 | int pid = fork(); |
| 897 | if (pid < 0) /* error */ |
| 898 | return -errno; |
| 899 | if (pid > 0) /* parent */ |
| 900 | return 0; |
| 901 | /* child */ |
| 902 | fd = xopen(bb_dev_null, O_RDWR); |
| 903 | dup2(fd, 0); |
| 904 | dup2(fd, 1); |
| 905 | dup2(fd, 2); |
Denis Vlasenko | 9af7c9d | 2007-01-19 21:19:35 +0000 | [diff] [blame] | 906 | while (fd > 2) close(fd--); |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 907 | setsid(); |
Denis Vlasenko | 8f8f268 | 2006-10-03 21:00:43 +0000 | [diff] [blame] | 908 | openlog(applet_name, LOG_PID, LOG_DAEMON); |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 909 | logmode = LOGMODE_SYSLOG; |
| 910 | return 1; |
| 911 | } |
Denis Vlasenko | f000065 | 2007-09-04 18:30:26 +0000 | [diff] [blame] | 912 | #else |
| 913 | static inline int daemonize(void) { return -ENOSYS; } |
| 914 | #endif |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 915 | |
| 916 | // TODO |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame] | 917 | static inline int we_saw_this_host_before(const char *hostname ATTRIBUTE_UNUSED) |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 918 | { |
| 919 | return 0; |
| 920 | } |
| 921 | |
| 922 | /* RPC strerror analogs are terminally idiotic: |
| 923 | * *mandatory* prefix and \n at end. |
| 924 | * This hopefully helps. Usage: |
| 925 | * error_msg_rpc(clnt_*error*(" ")) */ |
| 926 | static void error_msg_rpc(const char *msg) |
| 927 | { |
Denis Vlasenko | 23514fe | 2006-09-19 14:07:52 +0000 | [diff] [blame] | 928 | int len; |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 929 | while (msg[0] == ' ' || msg[0] == ':') msg++; |
| 930 | len = strlen(msg); |
| 931 | while (len && msg[len-1] == '\n') len--; |
| 932 | bb_error_msg("%.*s", len, msg); |
| 933 | } |
| 934 | |
Denis Vlasenko | 3bc59aa | 2006-09-17 15:04:01 +0000 | [diff] [blame] | 935 | // NB: mp->xxx fields may be trashed on exit |
Denis Vlasenko | b413368 | 2008-02-18 13:05:38 +0000 | [diff] [blame] | 936 | static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts) |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 937 | { |
| 938 | CLIENT *mclient; |
| 939 | char *hostname; |
| 940 | char *pathname; |
| 941 | char *mounthost; |
| 942 | struct nfs_mount_data data; |
| 943 | char *opt; |
| 944 | struct hostent *hp; |
| 945 | struct sockaddr_in server_addr; |
| 946 | struct sockaddr_in mount_server_addr; |
| 947 | int msock, fsock; |
| 948 | union { |
| 949 | struct fhstatus nfsv2; |
| 950 | struct mountres3 nfsv3; |
| 951 | } status; |
| 952 | int daemonized; |
| 953 | char *s; |
| 954 | int port; |
| 955 | int mountport; |
| 956 | int proto; |
Denis Vlasenko | f000065 | 2007-09-04 18:30:26 +0000 | [diff] [blame] | 957 | #if BB_MMU |
| 958 | int bg = 0; |
| 959 | #else |
| 960 | enum { bg = 0 }; |
| 961 | #endif |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 962 | int soft; |
| 963 | int intr; |
| 964 | int posix; |
| 965 | int nocto; |
| 966 | int noac; |
| 967 | int nolock; |
| 968 | int retry; |
| 969 | int tcp; |
| 970 | int mountprog; |
| 971 | int mountvers; |
| 972 | int nfsprog; |
| 973 | int nfsvers; |
| 974 | int retval; |
| 975 | |
| 976 | find_kernel_nfs_mount_version(); |
| 977 | |
| 978 | daemonized = 0; |
| 979 | mounthost = NULL; |
| 980 | retval = ETIMEDOUT; |
| 981 | msock = fsock = -1; |
| 982 | mclient = NULL; |
| 983 | |
| 984 | /* NB: hostname, mounthost, filteropts must be free()d prior to return */ |
| 985 | |
| 986 | filteropts = xstrdup(filteropts); /* going to trash it later... */ |
| 987 | |
| 988 | hostname = xstrdup(mp->mnt_fsname); |
| 989 | /* mount_main() guarantees that ':' is there */ |
| 990 | s = strchr(hostname, ':'); |
| 991 | pathname = s + 1; |
| 992 | *s = '\0'; |
| 993 | /* Ignore all but first hostname in replicated mounts |
| 994 | until they can be fully supported. (mack@sgi.com) */ |
| 995 | s = strchr(hostname, ','); |
| 996 | if (s) { |
| 997 | *s = '\0'; |
| 998 | bb_error_msg("warning: multiple hostnames not supported"); |
| 999 | } |
| 1000 | |
| 1001 | server_addr.sin_family = AF_INET; |
| 1002 | if (!inet_aton(hostname, &server_addr.sin_addr)) { |
| 1003 | hp = gethostbyname(hostname); |
| 1004 | if (hp == NULL) { |
| 1005 | bb_herror_msg("%s", hostname); |
| 1006 | goto fail; |
| 1007 | } |
| 1008 | if (hp->h_length > sizeof(struct in_addr)) { |
| 1009 | bb_error_msg("got bad hp->h_length"); |
| 1010 | hp->h_length = sizeof(struct in_addr); |
| 1011 | } |
| 1012 | memcpy(&server_addr.sin_addr, |
| 1013 | hp->h_addr, hp->h_length); |
| 1014 | } |
| 1015 | |
| 1016 | memcpy(&mount_server_addr, &server_addr, sizeof(mount_server_addr)); |
| 1017 | |
| 1018 | /* add IP address to mtab options for use when unmounting */ |
| 1019 | |
| 1020 | if (!mp->mnt_opts) { /* TODO: actually mp->mnt_opts is never NULL */ |
| 1021 | mp->mnt_opts = xasprintf("addr=%s", inet_ntoa(server_addr.sin_addr)); |
| 1022 | } else { |
| 1023 | char *tmp = xasprintf("%s%saddr=%s", mp->mnt_opts, |
| 1024 | mp->mnt_opts[0] ? "," : "", |
| 1025 | inet_ntoa(server_addr.sin_addr)); |
| 1026 | free(mp->mnt_opts); |
| 1027 | mp->mnt_opts = tmp; |
| 1028 | } |
| 1029 | |
| 1030 | /* Set default options. |
| 1031 | * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to |
| 1032 | * let the kernel decide. |
| 1033 | * timeo is filled in after we know whether it'll be TCP or UDP. */ |
| 1034 | memset(&data, 0, sizeof(data)); |
| 1035 | data.retrans = 3; |
| 1036 | data.acregmin = 3; |
| 1037 | data.acregmax = 60; |
| 1038 | data.acdirmin = 30; |
| 1039 | data.acdirmax = 60; |
| 1040 | data.namlen = NAME_MAX; |
| 1041 | |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1042 | soft = 0; |
| 1043 | intr = 0; |
| 1044 | posix = 0; |
| 1045 | nocto = 0; |
| 1046 | nolock = 0; |
| 1047 | noac = 0; |
| 1048 | retry = 10000; /* 10000 minutes ~ 1 week */ |
| 1049 | tcp = 0; |
| 1050 | |
| 1051 | mountprog = MOUNTPROG; |
| 1052 | mountvers = 0; |
| 1053 | port = 0; |
| 1054 | mountport = 0; |
| 1055 | nfsprog = 100003; |
| 1056 | nfsvers = 0; |
| 1057 | |
| 1058 | /* parse options */ |
Denis Vlasenko | 68de720 | 2007-05-09 20:38:04 +0000 | [diff] [blame] | 1059 | if (filteropts) for (opt = strtok(filteropts, ","); opt; opt = strtok(NULL, ",")) { |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1060 | char *opteq = strchr(opt, '='); |
| 1061 | if (opteq) { |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 1062 | static const char options[] ALIGN1 = |
Denis Vlasenko | 990d0f6 | 2007-07-24 15:54:42 +0000 | [diff] [blame] | 1063 | /* 0 */ "rsize\0" |
| 1064 | /* 1 */ "wsize\0" |
| 1065 | /* 2 */ "timeo\0" |
| 1066 | /* 3 */ "retrans\0" |
| 1067 | /* 4 */ "acregmin\0" |
| 1068 | /* 5 */ "acregmax\0" |
| 1069 | /* 6 */ "acdirmin\0" |
| 1070 | /* 7 */ "acdirmax\0" |
| 1071 | /* 8 */ "actimeo\0" |
| 1072 | /* 9 */ "retry\0" |
| 1073 | /* 10 */ "port\0" |
| 1074 | /* 11 */ "mountport\0" |
| 1075 | /* 12 */ "mounthost\0" |
| 1076 | /* 13 */ "mountprog\0" |
| 1077 | /* 14 */ "mountvers\0" |
| 1078 | /* 15 */ "nfsprog\0" |
| 1079 | /* 16 */ "nfsvers\0" |
| 1080 | /* 17 */ "vers\0" |
| 1081 | /* 18 */ "proto\0" |
| 1082 | /* 19 */ "namlen\0" |
| 1083 | /* 20 */ "addr\0"; |
Denis Vlasenko | 1385899 | 2006-10-08 12:49:22 +0000 | [diff] [blame] | 1084 | int val = xatoi_u(opteq + 1); |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1085 | *opteq = '\0'; |
Denis Vlasenko | 990d0f6 | 2007-07-24 15:54:42 +0000 | [diff] [blame] | 1086 | switch (index_in_strings(options, opt)) { |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1087 | case 0: // "rsize" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1088 | data.rsize = val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1089 | break; |
| 1090 | case 1: // "wsize" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1091 | data.wsize = val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1092 | break; |
| 1093 | case 2: // "timeo" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1094 | data.timeo = val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1095 | break; |
| 1096 | case 3: // "retrans" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1097 | data.retrans = val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1098 | break; |
| 1099 | case 4: // "acregmin" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1100 | data.acregmin = val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1101 | break; |
| 1102 | case 5: // "acregmax" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1103 | data.acregmax = val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1104 | break; |
| 1105 | case 6: // "acdirmin" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1106 | data.acdirmin = val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1107 | break; |
| 1108 | case 7: // "acdirmax" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1109 | data.acdirmax = val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1110 | break; |
| 1111 | case 8: // "actimeo" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1112 | data.acregmin = val; |
| 1113 | data.acregmax = val; |
| 1114 | data.acdirmin = val; |
| 1115 | data.acdirmax = val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1116 | break; |
| 1117 | case 9: // "retry" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1118 | retry = val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1119 | break; |
| 1120 | case 10: // "port" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1121 | port = val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1122 | break; |
| 1123 | case 11: // "mountport" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1124 | mountport = val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1125 | break; |
| 1126 | case 12: // "mounthost" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1127 | mounthost = xstrndup(opteq+1, |
Denis Vlasenko | 5af906e | 2006-11-05 18:05:09 +0000 | [diff] [blame] | 1128 | strcspn(opteq+1," \t\n\r,")); |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1129 | break; |
| 1130 | case 13: // "mountprog" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1131 | mountprog = val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1132 | break; |
| 1133 | case 14: // "mountvers" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1134 | mountvers = val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1135 | break; |
| 1136 | case 15: // "nfsprog" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1137 | nfsprog = val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1138 | break; |
| 1139 | case 16: // "nfsvers" |
| 1140 | case 17: // "vers" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1141 | nfsvers = val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1142 | break; |
| 1143 | case 18: // "proto" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1144 | if (!strncmp(opteq+1, "tcp", 3)) |
| 1145 | tcp = 1; |
| 1146 | else if (!strncmp(opteq+1, "udp", 3)) |
| 1147 | tcp = 0; |
| 1148 | else |
| 1149 | bb_error_msg("warning: unrecognized proto= option"); |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1150 | break; |
| 1151 | case 19: // "namlen" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1152 | if (nfs_mount_version >= 2) |
| 1153 | data.namlen = val; |
| 1154 | else |
| 1155 | bb_error_msg("warning: option namlen is not supported\n"); |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1156 | break; |
| 1157 | case 20: // "addr" - ignore |
| 1158 | break; |
| 1159 | default: |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1160 | bb_error_msg("unknown nfs mount parameter: %s=%d", opt, val); |
| 1161 | goto fail; |
| 1162 | } |
| 1163 | } |
| 1164 | else { |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 1165 | static const char options[] ALIGN1 = |
Denis Vlasenko | 990d0f6 | 2007-07-24 15:54:42 +0000 | [diff] [blame] | 1166 | "bg\0" |
| 1167 | "fg\0" |
| 1168 | "soft\0" |
| 1169 | "hard\0" |
| 1170 | "intr\0" |
| 1171 | "posix\0" |
| 1172 | "cto\0" |
| 1173 | "ac\0" |
| 1174 | "tcp\0" |
| 1175 | "udp\0" |
| 1176 | "lock\0"; |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1177 | int val = 1; |
| 1178 | if (!strncmp(opt, "no", 2)) { |
| 1179 | val = 0; |
| 1180 | opt += 2; |
| 1181 | } |
Denis Vlasenko | 990d0f6 | 2007-07-24 15:54:42 +0000 | [diff] [blame] | 1182 | switch (index_in_strings(options, opt)) { |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1183 | case 0: // "bg" |
Denis Vlasenko | f000065 | 2007-09-04 18:30:26 +0000 | [diff] [blame] | 1184 | #if BB_MMU |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1185 | bg = val; |
Denis Vlasenko | f000065 | 2007-09-04 18:30:26 +0000 | [diff] [blame] | 1186 | #endif |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1187 | break; |
| 1188 | case 1: // "fg" |
Denis Vlasenko | f000065 | 2007-09-04 18:30:26 +0000 | [diff] [blame] | 1189 | #if BB_MMU |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1190 | bg = !val; |
Denis Vlasenko | f000065 | 2007-09-04 18:30:26 +0000 | [diff] [blame] | 1191 | #endif |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1192 | break; |
| 1193 | case 2: // "soft" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1194 | soft = val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1195 | break; |
| 1196 | case 3: // "hard" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1197 | soft = !val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1198 | break; |
| 1199 | case 4: // "intr" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1200 | intr = val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1201 | break; |
| 1202 | case 5: // "posix" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1203 | posix = val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1204 | break; |
| 1205 | case 6: // "cto" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1206 | nocto = !val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1207 | break; |
| 1208 | case 7: // "ac" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1209 | noac = !val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1210 | break; |
| 1211 | case 8: // "tcp" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1212 | tcp = val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1213 | break; |
| 1214 | case 9: // "udp" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1215 | tcp = !val; |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1216 | break; |
| 1217 | case 10: // "lock" |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1218 | if (nfs_mount_version >= 3) |
| 1219 | nolock = !val; |
| 1220 | else |
| 1221 | bb_error_msg("warning: option nolock is not supported"); |
Denis Vlasenko | 68f2187 | 2006-10-26 01:47:34 +0000 | [diff] [blame] | 1222 | break; |
| 1223 | default: |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1224 | bb_error_msg("unknown nfs mount option: %s%s", val ? "" : "no", opt); |
| 1225 | goto fail; |
| 1226 | } |
| 1227 | } |
| 1228 | } |
| 1229 | proto = (tcp) ? IPPROTO_TCP : IPPROTO_UDP; |
| 1230 | |
| 1231 | data.flags = (soft ? NFS_MOUNT_SOFT : 0) |
| 1232 | | (intr ? NFS_MOUNT_INTR : 0) |
| 1233 | | (posix ? NFS_MOUNT_POSIX : 0) |
| 1234 | | (nocto ? NFS_MOUNT_NOCTO : 0) |
| 1235 | | (noac ? NFS_MOUNT_NOAC : 0); |
| 1236 | if (nfs_mount_version >= 2) |
| 1237 | data.flags |= (tcp ? NFS_MOUNT_TCP : 0); |
| 1238 | if (nfs_mount_version >= 3) |
| 1239 | data.flags |= (nolock ? NFS_MOUNT_NONLM : 0); |
| 1240 | if (nfsvers > MAX_NFSPROT || mountvers > MAX_NFSPROT) { |
| 1241 | bb_error_msg("NFSv%d not supported", nfsvers); |
| 1242 | goto fail; |
| 1243 | } |
| 1244 | if (nfsvers && !mountvers) |
| 1245 | mountvers = (nfsvers < 3) ? 1 : nfsvers; |
| 1246 | if (nfsvers && nfsvers < mountvers) { |
| 1247 | mountvers = nfsvers; |
| 1248 | } |
| 1249 | |
| 1250 | /* Adjust options if none specified */ |
| 1251 | if (!data.timeo) |
| 1252 | data.timeo = tcp ? 70 : 7; |
| 1253 | |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1254 | data.version = nfs_mount_version; |
| 1255 | |
| 1256 | if (vfsflags & MS_REMOUNT) |
| 1257 | goto do_mount; |
| 1258 | |
| 1259 | /* |
| 1260 | * If the previous mount operation on the same host was |
| 1261 | * backgrounded, and the "bg" for this mount is also set, |
| 1262 | * give up immediately, to avoid the initial timeout. |
| 1263 | */ |
| 1264 | if (bg && we_saw_this_host_before(hostname)) { |
Denis Vlasenko | 7d8de4d | 2007-08-28 11:23:23 +0000 | [diff] [blame] | 1265 | daemonized = daemonize(); |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1266 | if (daemonized <= 0) { /* parent or error */ |
| 1267 | retval = -daemonized; |
| 1268 | goto ret; |
| 1269 | } |
| 1270 | } |
| 1271 | |
| 1272 | /* create mount daemon client */ |
| 1273 | /* See if the nfs host = mount host. */ |
| 1274 | if (mounthost) { |
| 1275 | if (mounthost[0] >= '0' && mounthost[0] <= '9') { |
| 1276 | mount_server_addr.sin_family = AF_INET; |
| 1277 | mount_server_addr.sin_addr.s_addr = inet_addr(hostname); |
| 1278 | } else { |
| 1279 | hp = gethostbyname(mounthost); |
| 1280 | if (hp == NULL) { |
| 1281 | bb_herror_msg("%s", mounthost); |
| 1282 | goto fail; |
| 1283 | } else { |
| 1284 | if (hp->h_length > sizeof(struct in_addr)) { |
| 1285 | bb_error_msg("got bad hp->h_length?"); |
| 1286 | hp->h_length = sizeof(struct in_addr); |
| 1287 | } |
| 1288 | mount_server_addr.sin_family = AF_INET; |
| 1289 | memcpy(&mount_server_addr.sin_addr, |
| 1290 | hp->h_addr, hp->h_length); |
| 1291 | } |
| 1292 | } |
| 1293 | } |
| 1294 | |
| 1295 | /* |
| 1296 | * The following loop implements the mount retries. When the mount |
| 1297 | * times out, and the "bg" option is set, we background ourself |
| 1298 | * and continue trying. |
| 1299 | * |
| 1300 | * The case where the mount point is not present and the "bg" |
| 1301 | * option is set, is treated as a timeout. This is done to |
| 1302 | * support nested mounts. |
| 1303 | * |
| 1304 | * The "retry" count specified by the user is the number of |
| 1305 | * minutes to retry before giving up. |
| 1306 | */ |
| 1307 | { |
| 1308 | struct timeval total_timeout; |
| 1309 | struct timeval retry_timeout; |
Denis Vlasenko | b925605 | 2007-09-28 10:29:17 +0000 | [diff] [blame] | 1310 | struct pmap pm_mnt; |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1311 | time_t t; |
| 1312 | time_t prevt; |
| 1313 | time_t timeout; |
| 1314 | |
| 1315 | retry_timeout.tv_sec = 3; |
| 1316 | retry_timeout.tv_usec = 0; |
| 1317 | total_timeout.tv_sec = 20; |
| 1318 | total_timeout.tv_usec = 0; |
| 1319 | timeout = time(NULL) + 60 * retry; |
| 1320 | prevt = 0; |
| 1321 | t = 30; |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 1322 | retry: |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1323 | /* be careful not to use too many CPU cycles */ |
| 1324 | if (t - prevt < 30) |
| 1325 | sleep(30); |
| 1326 | |
Denis Vlasenko | b925605 | 2007-09-28 10:29:17 +0000 | [diff] [blame] | 1327 | get_mountport(&pm_mnt, &mount_server_addr, |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1328 | mountprog, |
| 1329 | mountvers, |
| 1330 | proto, |
| 1331 | mountport); |
Denis Vlasenko | b925605 | 2007-09-28 10:29:17 +0000 | [diff] [blame] | 1332 | nfsvers = (pm_mnt.pm_vers < 2) ? 2 : pm_mnt.pm_vers; |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1333 | |
| 1334 | /* contact the mount daemon via TCP */ |
Denis Vlasenko | b925605 | 2007-09-28 10:29:17 +0000 | [diff] [blame] | 1335 | mount_server_addr.sin_port = htons(pm_mnt.pm_port); |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1336 | msock = RPC_ANYSOCK; |
| 1337 | |
Denis Vlasenko | b925605 | 2007-09-28 10:29:17 +0000 | [diff] [blame] | 1338 | switch (pm_mnt.pm_prot) { |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1339 | case IPPROTO_UDP: |
| 1340 | mclient = clntudp_create(&mount_server_addr, |
Denis Vlasenko | b925605 | 2007-09-28 10:29:17 +0000 | [diff] [blame] | 1341 | pm_mnt.pm_prog, |
| 1342 | pm_mnt.pm_vers, |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1343 | retry_timeout, |
| 1344 | &msock); |
| 1345 | if (mclient) |
| 1346 | break; |
Denis Vlasenko | b925605 | 2007-09-28 10:29:17 +0000 | [diff] [blame] | 1347 | mount_server_addr.sin_port = htons(pm_mnt.pm_port); |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1348 | msock = RPC_ANYSOCK; |
| 1349 | case IPPROTO_TCP: |
| 1350 | mclient = clnttcp_create(&mount_server_addr, |
Denis Vlasenko | b925605 | 2007-09-28 10:29:17 +0000 | [diff] [blame] | 1351 | pm_mnt.pm_prog, |
| 1352 | pm_mnt.pm_vers, |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1353 | &msock, 0, 0); |
| 1354 | break; |
| 1355 | default: |
Denis Vlasenko | 7d8de4d | 2007-08-28 11:23:23 +0000 | [diff] [blame] | 1356 | mclient = NULL; |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1357 | } |
| 1358 | if (!mclient) { |
| 1359 | if (!daemonized && prevt == 0) |
| 1360 | error_msg_rpc(clnt_spcreateerror(" ")); |
| 1361 | } else { |
| 1362 | enum clnt_stat clnt_stat; |
| 1363 | /* try to mount hostname:pathname */ |
| 1364 | mclient->cl_auth = authunix_create_default(); |
| 1365 | |
| 1366 | /* make pointers in xdr_mountres3 NULL so |
| 1367 | * that xdr_array allocates memory for us |
| 1368 | */ |
| 1369 | memset(&status, 0, sizeof(status)); |
| 1370 | |
Denis Vlasenko | b925605 | 2007-09-28 10:29:17 +0000 | [diff] [blame] | 1371 | if (pm_mnt.pm_vers == 3) |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1372 | clnt_stat = clnt_call(mclient, MOUNTPROC3_MNT, |
| 1373 | (xdrproc_t) xdr_dirpath, |
| 1374 | (caddr_t) &pathname, |
| 1375 | (xdrproc_t) xdr_mountres3, |
| 1376 | (caddr_t) &status, |
| 1377 | total_timeout); |
| 1378 | else |
| 1379 | clnt_stat = clnt_call(mclient, MOUNTPROC_MNT, |
| 1380 | (xdrproc_t) xdr_dirpath, |
| 1381 | (caddr_t) &pathname, |
| 1382 | (xdrproc_t) xdr_fhstatus, |
| 1383 | (caddr_t) &status, |
| 1384 | total_timeout); |
| 1385 | |
| 1386 | if (clnt_stat == RPC_SUCCESS) |
| 1387 | goto prepare_kernel_data; /* we're done */ |
| 1388 | if (errno != ECONNREFUSED) { |
| 1389 | error_msg_rpc(clnt_sperror(mclient, " ")); |
| 1390 | goto fail; /* don't retry */ |
| 1391 | } |
| 1392 | /* Connection refused */ |
| 1393 | if (!daemonized && prevt == 0) /* print just once */ |
| 1394 | error_msg_rpc(clnt_sperror(mclient, " ")); |
| 1395 | auth_destroy(mclient->cl_auth); |
| 1396 | clnt_destroy(mclient); |
Denis Vlasenko | 7d8de4d | 2007-08-28 11:23:23 +0000 | [diff] [blame] | 1397 | mclient = NULL; |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1398 | close(msock); |
Denis Vlasenko | 7d8de4d | 2007-08-28 11:23:23 +0000 | [diff] [blame] | 1399 | msock = -1; |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1400 | } |
| 1401 | |
| 1402 | /* Timeout. We are going to retry... maybe */ |
| 1403 | |
| 1404 | if (!bg) |
| 1405 | goto fail; |
| 1406 | if (!daemonized) { |
| 1407 | daemonized = daemonize(); |
| 1408 | if (daemonized <= 0) { /* parent or error */ |
| 1409 | retval = -daemonized; |
| 1410 | goto ret; |
| 1411 | } |
| 1412 | } |
| 1413 | prevt = t; |
| 1414 | t = time(NULL); |
| 1415 | if (t >= timeout) |
| 1416 | /* TODO error message */ |
| 1417 | goto fail; |
| 1418 | |
| 1419 | goto retry; |
| 1420 | } |
| 1421 | |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 1422 | prepare_kernel_data: |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1423 | |
| 1424 | if (nfsvers == 2) { |
| 1425 | if (status.nfsv2.fhs_status != 0) { |
| 1426 | bb_error_msg("%s:%s failed, reason given by server: %s", |
| 1427 | hostname, pathname, |
| 1428 | nfs_strerror(status.nfsv2.fhs_status)); |
| 1429 | goto fail; |
| 1430 | } |
| 1431 | memcpy(data.root.data, |
| 1432 | (char *) status.nfsv2.fhstatus_u.fhs_fhandle, |
| 1433 | NFS_FHSIZE); |
| 1434 | data.root.size = NFS_FHSIZE; |
| 1435 | memcpy(data.old_root.data, |
| 1436 | (char *) status.nfsv2.fhstatus_u.fhs_fhandle, |
| 1437 | NFS_FHSIZE); |
| 1438 | } else { |
| 1439 | fhandle3 *my_fhandle; |
| 1440 | if (status.nfsv3.fhs_status != 0) { |
| 1441 | bb_error_msg("%s:%s failed, reason given by server: %s", |
| 1442 | hostname, pathname, |
| 1443 | nfs_strerror(status.nfsv3.fhs_status)); |
| 1444 | goto fail; |
| 1445 | } |
| 1446 | my_fhandle = &status.nfsv3.mountres3_u.mountinfo.fhandle; |
| 1447 | memset(data.old_root.data, 0, NFS_FHSIZE); |
| 1448 | memset(&data.root, 0, sizeof(data.root)); |
| 1449 | data.root.size = my_fhandle->fhandle3_len; |
| 1450 | memcpy(data.root.data, |
| 1451 | (char *) my_fhandle->fhandle3_val, |
| 1452 | my_fhandle->fhandle3_len); |
| 1453 | |
| 1454 | data.flags |= NFS_MOUNT_VER3; |
| 1455 | } |
| 1456 | |
| 1457 | /* create nfs socket for kernel */ |
| 1458 | |
| 1459 | if (tcp) { |
| 1460 | if (nfs_mount_version < 3) { |
| 1461 | bb_error_msg("NFS over TCP is not supported"); |
| 1462 | goto fail; |
| 1463 | } |
| 1464 | fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| 1465 | } else |
| 1466 | fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); |
| 1467 | if (fsock < 0) { |
| 1468 | bb_perror_msg("nfs socket"); |
| 1469 | goto fail; |
| 1470 | } |
| 1471 | if (bindresvport(fsock, 0) < 0) { |
| 1472 | bb_perror_msg("nfs bindresvport"); |
| 1473 | goto fail; |
| 1474 | } |
| 1475 | if (port == 0) { |
| 1476 | server_addr.sin_port = PMAPPORT; |
| 1477 | port = pmap_getport(&server_addr, nfsprog, nfsvers, |
| 1478 | tcp ? IPPROTO_TCP : IPPROTO_UDP); |
| 1479 | if (port == 0) |
| 1480 | port = NFS_PORT; |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1481 | } |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1482 | server_addr.sin_port = htons(port); |
| 1483 | |
| 1484 | /* prepare data structure for kernel */ |
| 1485 | |
| 1486 | data.fd = fsock; |
| 1487 | memcpy((char *) &data.addr, (char *) &server_addr, sizeof(data.addr)); |
| 1488 | strncpy(data.hostname, hostname, sizeof(data.hostname)); |
| 1489 | |
| 1490 | /* clean up */ |
| 1491 | |
| 1492 | auth_destroy(mclient->cl_auth); |
| 1493 | clnt_destroy(mclient); |
| 1494 | close(msock); |
Denis Vlasenko | 7d8de4d | 2007-08-28 11:23:23 +0000 | [diff] [blame] | 1495 | msock = -1; |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1496 | |
| 1497 | if (bg) { |
| 1498 | /* We must wait until mount directory is available */ |
| 1499 | struct stat statbuf; |
| 1500 | int delay = 1; |
| 1501 | while (stat(mp->mnt_dir, &statbuf) == -1) { |
| 1502 | if (!daemonized) { |
| 1503 | daemonized = daemonize(); |
| 1504 | if (daemonized <= 0) { /* parent or error */ |
Denis Vlasenko | 7d8de4d | 2007-08-28 11:23:23 +0000 | [diff] [blame] | 1505 | // FIXME: parent doesn't close fsock - ??! |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1506 | retval = -daemonized; |
| 1507 | goto ret; |
| 1508 | } |
| 1509 | } |
| 1510 | sleep(delay); /* 1, 2, 4, 8, 16, 30, ... */ |
| 1511 | delay *= 2; |
| 1512 | if (delay > 30) |
| 1513 | delay = 30; |
| 1514 | } |
| 1515 | } |
| 1516 | |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 1517 | do_mount: /* perform actual mount */ |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1518 | |
Denis Vlasenko | 06c0a71 | 2007-01-29 22:51:44 +0000 | [diff] [blame] | 1519 | mp->mnt_type = (char*)"nfs"; |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1520 | retval = mount_it_now(mp, vfsflags, (char*)&data); |
| 1521 | goto ret; |
| 1522 | |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 1523 | fail: /* abort */ |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1524 | |
Denis Vlasenko | 7d8de4d | 2007-08-28 11:23:23 +0000 | [diff] [blame] | 1525 | if (msock >= 0) { |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1526 | if (mclient) { |
| 1527 | auth_destroy(mclient->cl_auth); |
| 1528 | clnt_destroy(mclient); |
| 1529 | } |
| 1530 | close(msock); |
| 1531 | } |
Denis Vlasenko | 7d8de4d | 2007-08-28 11:23:23 +0000 | [diff] [blame] | 1532 | if (fsock >= 0) |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1533 | close(fsock); |
| 1534 | |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 1535 | ret: |
Denis Vlasenko | 25098f7 | 2006-09-14 15:46:33 +0000 | [diff] [blame] | 1536 | free(hostname); |
| 1537 | free(mounthost); |
| 1538 | free(filteropts); |
| 1539 | return retval; |
| 1540 | } |
| 1541 | |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1542 | #else /* !ENABLE_FEATURE_MOUNT_NFS */ |
| 1543 | |
| 1544 | /* Never called. Call should be optimized out. */ |
Denis Vlasenko | b413368 | 2008-02-18 13:05:38 +0000 | [diff] [blame] | 1545 | int nfsmount(struct mntent *mp, long vfsflags, char *filteropts); |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1546 | |
| 1547 | #endif /* !ENABLE_FEATURE_MOUNT_NFS */ |
| 1548 | |
| 1549 | // Mount one directory. Handles CIFS, NFS, loopback, autobind, and filesystem |
| 1550 | // type detection. Returns 0 for success, nonzero for failure. |
Denis Vlasenko | 3bc59aa | 2006-09-17 15:04:01 +0000 | [diff] [blame] | 1551 | // NB: mp->xxx fields may be trashed on exit |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1552 | static int singlemount(struct mntent *mp, int ignore_busy) |
| 1553 | { |
Denis Vlasenko | b413368 | 2008-02-18 13:05:38 +0000 | [diff] [blame] | 1554 | int rc = -1; |
| 1555 | long vfsflags; |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1556 | char *loopFile = 0, *filteropts = 0; |
| 1557 | llist_t *fl = 0; |
| 1558 | struct stat st; |
| 1559 | |
| 1560 | vfsflags = parse_mount_options(mp->mnt_opts, &filteropts); |
| 1561 | |
| 1562 | // Treat fstype "auto" as unspecified. |
| 1563 | |
Denis Vlasenko | a4522c5 | 2008-03-17 08:46:43 +0000 | [diff] [blame] | 1564 | if (mp->mnt_type && strcmp(mp->mnt_type, "auto") == 0) |
| 1565 | mp->mnt_type = NULL; |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1566 | |
Denis Vlasenko | 2535f12 | 2007-09-15 13:28:30 +0000 | [diff] [blame] | 1567 | // Might this be a virtual filesystem? |
| 1568 | |
| 1569 | if (ENABLE_FEATURE_MOUNT_HELPERS |
Denis Vlasenko | c03e872 | 2007-12-26 20:56:55 +0000 | [diff] [blame] | 1570 | && (strchr(mp->mnt_fsname, '#')) |
Denis Vlasenko | 2535f12 | 2007-09-15 13:28:30 +0000 | [diff] [blame] | 1571 | ) { |
| 1572 | char *s, *p, *args[35]; |
| 1573 | int n = 0; |
Denis Vlasenko | a4522c5 | 2008-03-17 08:46:43 +0000 | [diff] [blame] | 1574 | // FIXME: does it allow execution of arbitrary commands?! |
| 1575 | // What args[0] can end up with? |
Denis Vlasenko | 2535f12 | 2007-09-15 13:28:30 +0000 | [diff] [blame] | 1576 | for (s = p = mp->mnt_fsname; *s && n < 35-3; ++s) { |
| 1577 | if (s[0] == '#' && s[1] != '#') { |
| 1578 | *s = '\0'; |
| 1579 | args[n++] = p; |
| 1580 | p = s + 1; |
| 1581 | } |
| 1582 | } |
| 1583 | args[n++] = p; |
| 1584 | args[n++] = mp->mnt_dir; |
| 1585 | args[n] = NULL; |
| 1586 | rc = wait4pid(xspawn(args)); |
| 1587 | goto report_error; |
| 1588 | } |
| 1589 | |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1590 | // Might this be an CIFS filesystem? |
| 1591 | |
Denis Vlasenko | 6cd2d2b | 2007-01-22 14:06:03 +0000 | [diff] [blame] | 1592 | if (ENABLE_FEATURE_MOUNT_CIFS |
Denis Vlasenko | a4522c5 | 2008-03-17 08:46:43 +0000 | [diff] [blame] | 1593 | && (!mp->mnt_type || strcmp(mp->mnt_type, "cifs") == 0) |
| 1594 | && (mp->mnt_fsname[0] == '/' || mp->mnt_fsname[0] == '\\') |
| 1595 | && mp->mnt_fsname[0] == mp->mnt_fsname[1] |
Denis Vlasenko | 6cd2d2b | 2007-01-22 14:06:03 +0000 | [diff] [blame] | 1596 | ) { |
Denis Vlasenko | 5870ad9 | 2007-02-04 02:39:55 +0000 | [diff] [blame] | 1597 | len_and_sockaddr *lsa; |
| 1598 | char *ip, *dotted; |
| 1599 | char *s; |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1600 | |
| 1601 | rc = 1; |
| 1602 | // Replace '/' with '\' and verify that unc points to "//server/share". |
| 1603 | |
| 1604 | for (s = mp->mnt_fsname; *s; ++s) |
| 1605 | if (*s == '/') *s = '\\'; |
| 1606 | |
| 1607 | // get server IP |
| 1608 | |
| 1609 | s = strrchr(mp->mnt_fsname, '\\'); |
Denis Vlasenko | 5870ad9 | 2007-02-04 02:39:55 +0000 | [diff] [blame] | 1610 | if (s <= mp->mnt_fsname+1) goto report_error; |
Denis Vlasenko | 6cd2d2b | 2007-01-22 14:06:03 +0000 | [diff] [blame] | 1611 | *s = '\0'; |
Denis Vlasenko | 5870ad9 | 2007-02-04 02:39:55 +0000 | [diff] [blame] | 1612 | lsa = host2sockaddr(mp->mnt_fsname+2, 0); |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1613 | *s = '\\'; |
Denis Vlasenko | 5870ad9 | 2007-02-04 02:39:55 +0000 | [diff] [blame] | 1614 | if (!lsa) goto report_error; |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1615 | |
Denis Vlasenko | 5870ad9 | 2007-02-04 02:39:55 +0000 | [diff] [blame] | 1616 | // insert ip=... option into string flags. |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1617 | |
Bernhard Reutner-Fischer | 8c69afd | 2008-01-29 10:33:34 +0000 | [diff] [blame] | 1618 | dotted = xmalloc_sockaddr2dotted_noport(&lsa->u.sa); |
Denis Vlasenko | 5870ad9 | 2007-02-04 02:39:55 +0000 | [diff] [blame] | 1619 | ip = xasprintf("ip=%s", dotted); |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1620 | parse_mount_options(ip, &filteropts); |
| 1621 | |
| 1622 | // compose new unc '\\server-ip\share' |
Denis Vlasenko | 5870ad9 | 2007-02-04 02:39:55 +0000 | [diff] [blame] | 1623 | // (s => slash after hostname) |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1624 | |
Denis Vlasenko | 5870ad9 | 2007-02-04 02:39:55 +0000 | [diff] [blame] | 1625 | mp->mnt_fsname = xasprintf("\\\\%s%s", dotted, s); |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1626 | |
| 1627 | // lock is required |
| 1628 | vfsflags |= MS_MANDLOCK; |
| 1629 | |
Denis Vlasenko | 06c0a71 | 2007-01-29 22:51:44 +0000 | [diff] [blame] | 1630 | mp->mnt_type = (char*)"cifs"; |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1631 | rc = mount_it_now(mp, vfsflags, filteropts); |
Denis Vlasenko | 5870ad9 | 2007-02-04 02:39:55 +0000 | [diff] [blame] | 1632 | if (ENABLE_FEATURE_CLEAN_UP) { |
| 1633 | free(mp->mnt_fsname); |
| 1634 | free(ip); |
| 1635 | free(dotted); |
| 1636 | free(lsa); |
| 1637 | } |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1638 | goto report_error; |
| 1639 | } |
| 1640 | |
| 1641 | // Might this be an NFS filesystem? |
| 1642 | |
Denis Vlasenko | 6cd2d2b | 2007-01-22 14:06:03 +0000 | [diff] [blame] | 1643 | if (ENABLE_FEATURE_MOUNT_NFS |
Denis Vlasenko | 0e2c9fb | 2007-08-03 14:16:24 +0000 | [diff] [blame] | 1644 | && (!mp->mnt_type || !strcmp(mp->mnt_type, "nfs")) |
Denis Vlasenko | 6cd2d2b | 2007-01-22 14:06:03 +0000 | [diff] [blame] | 1645 | && strchr(mp->mnt_fsname, ':') != NULL |
| 1646 | ) { |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1647 | rc = nfsmount(mp, vfsflags, filteropts); |
| 1648 | goto report_error; |
| 1649 | } |
| 1650 | |
| 1651 | // Look at the file. (Not found isn't a failure for remount, or for |
| 1652 | // a synthetic filesystem like proc or sysfs.) |
Denis Vlasenko | 38ec147 | 2007-05-20 12:32:41 +0000 | [diff] [blame] | 1653 | // (We use stat, not lstat, in order to allow |
| 1654 | // mount symlink_to_file_or_blkdev dir) |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1655 | |
Denis Vlasenko | 38ec147 | 2007-05-20 12:32:41 +0000 | [diff] [blame] | 1656 | if (!stat(mp->mnt_fsname, &st) |
Denis Vlasenko | 6cd2d2b | 2007-01-22 14:06:03 +0000 | [diff] [blame] | 1657 | && !(vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE)) |
| 1658 | ) { |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1659 | // Do we need to allocate a loopback device for it? |
| 1660 | |
| 1661 | if (ENABLE_FEATURE_MOUNT_LOOP && S_ISREG(st.st_mode)) { |
| 1662 | loopFile = bb_simplify_path(mp->mnt_fsname); |
Denis Vlasenko | 0e2c9fb | 2007-08-03 14:16:24 +0000 | [diff] [blame] | 1663 | mp->mnt_fsname = NULL; /* will receive malloced loop dev name */ |
| 1664 | if (set_loop(&(mp->mnt_fsname), loopFile, 0) < 0) { |
| 1665 | if (errno == EPERM || errno == EACCES) |
| 1666 | bb_error_msg(bb_msg_perm_denied_are_you_root); |
| 1667 | else |
| 1668 | bb_perror_msg("cannot setup loop device"); |
Denis Vlasenko | 13b4924 | 2006-09-17 15:04:35 +0000 | [diff] [blame] | 1669 | return errno; |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1670 | } |
| 1671 | |
| 1672 | // Autodetect bind mounts |
| 1673 | |
| 1674 | } else if (S_ISDIR(st.st_mode) && !mp->mnt_type) |
| 1675 | vfsflags |= MS_BIND; |
| 1676 | } |
| 1677 | |
| 1678 | /* If we know the fstype (or don't need to), jump straight |
| 1679 | * to the actual mount. */ |
| 1680 | |
| 1681 | if (mp->mnt_type || (vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE))) |
| 1682 | rc = mount_it_now(mp, vfsflags, filteropts); |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1683 | else { |
Denis Vlasenko | 6cd2d2b | 2007-01-22 14:06:03 +0000 | [diff] [blame] | 1684 | // Loop through filesystem types until mount succeeds |
| 1685 | // or we run out |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1686 | |
| 1687 | /* Initialize list of block backed filesystems. This has to be |
| 1688 | * done here so that during "mount -a", mounts after /proc shows up |
| 1689 | * can autodetect. */ |
| 1690 | |
| 1691 | if (!fslist) { |
| 1692 | fslist = get_block_backed_filesystems(); |
| 1693 | if (ENABLE_FEATURE_CLEAN_UP && fslist) |
| 1694 | atexit(delete_block_backed_filesystems); |
| 1695 | } |
| 1696 | |
| 1697 | for (fl = fslist; fl; fl = fl->link) { |
| 1698 | mp->mnt_type = fl->data; |
Denis Vlasenko | 13b4924 | 2006-09-17 15:04:35 +0000 | [diff] [blame] | 1699 | rc = mount_it_now(mp, vfsflags, filteropts); |
Denis Vlasenko | 8d474b5 | 2006-09-17 15:00:58 +0000 | [diff] [blame] | 1700 | if (!rc) break; |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1701 | } |
| 1702 | } |
| 1703 | |
| 1704 | // If mount failed, clean up loop file (if any). |
| 1705 | |
| 1706 | if (ENABLE_FEATURE_MOUNT_LOOP && rc && loopFile) { |
| 1707 | del_loop(mp->mnt_fsname); |
| 1708 | if (ENABLE_FEATURE_CLEAN_UP) { |
| 1709 | free(loopFile); |
| 1710 | free(mp->mnt_fsname); |
| 1711 | } |
| 1712 | } |
| 1713 | |
Denis Vlasenko | 5870ad9 | 2007-02-04 02:39:55 +0000 | [diff] [blame] | 1714 | report_error: |
| 1715 | if (ENABLE_FEATURE_CLEAN_UP) |
| 1716 | free(filteropts); |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1717 | |
Denis Vlasenko | c8d4d2f | 2007-09-07 19:33:56 +0000 | [diff] [blame] | 1718 | if (errno == EBUSY && ignore_busy) |
| 1719 | return 0; |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1720 | if (rc < 0) |
Denis Vlasenko | 0e2c9fb | 2007-08-03 14:16:24 +0000 | [diff] [blame] | 1721 | bb_perror_msg("mounting %s on %s failed", mp->mnt_fsname, mp->mnt_dir); |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1722 | return rc; |
| 1723 | } |
| 1724 | |
| 1725 | // Parse options, if necessary parse fstab/mtab, and call singlemount for |
| 1726 | // each directory to be mounted. |
| 1727 | |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 1728 | static const char must_be_root[] ALIGN1 = "you must be root"; |
Denis Vlasenko | 13c5a68 | 2006-10-16 22:39:51 +0000 | [diff] [blame] | 1729 | |
Denis Vlasenko | 9b49a5e | 2007-10-11 10:05:36 +0000 | [diff] [blame] | 1730 | int mount_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1731 | int mount_main(int argc, char **argv) |
| 1732 | { |
Denis Vlasenko | a4522c5 | 2008-03-17 08:46:43 +0000 | [diff] [blame] | 1733 | char *cmdopts = xstrdup(""); |
| 1734 | char *fstype = NULL; |
| 1735 | char *storage_path = NULL; |
Denis Vlasenko | 85f9e32 | 2006-09-19 14:14:12 +0000 | [diff] [blame] | 1736 | char *opt_o; |
| 1737 | const char *fstabname; |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1738 | FILE *fstab; |
Denis Vlasenko | 9c99b62 | 2006-09-17 15:05:31 +0000 | [diff] [blame] | 1739 | int i, j, rc = 0; |
Denis Vlasenko | 67b23e6 | 2006-10-03 21:00:06 +0000 | [diff] [blame] | 1740 | unsigned opt; |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1741 | struct mntent mtpair[2], *mtcur = mtpair; |
Denis Vlasenko | 13c5a68 | 2006-10-16 22:39:51 +0000 | [diff] [blame] | 1742 | SKIP_DESKTOP(const int nonroot = 0;) |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1743 | |
Denis Vlasenko | b413368 | 2008-02-18 13:05:38 +0000 | [diff] [blame] | 1744 | USE_DESKTOP( int nonroot = ) sanitize_env_if_suid(); |
Denis Vlasenko | c9ca0a3 | 2008-02-18 11:08:33 +0000 | [diff] [blame] | 1745 | |
Denis Vlasenko | f732e96 | 2008-02-18 12:07:49 +0000 | [diff] [blame] | 1746 | // Parse long options, like --bind and --move. Note that -o option |
| 1747 | // and --option are synonymous. Yes, this means --remount,rw works. |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1748 | |
Denis Vlasenko | 9c99b62 | 2006-09-17 15:05:31 +0000 | [diff] [blame] | 1749 | for (i = j = 0; i < argc; i++) { |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1750 | if (argv[i][0] == '-' && argv[i][1] == '-') { |
Denis Vlasenko | 13c5a68 | 2006-10-16 22:39:51 +0000 | [diff] [blame] | 1751 | append_mount_options(&cmdopts, argv[i]+2); |
Denis Vlasenko | 9c99b62 | 2006-09-17 15:05:31 +0000 | [diff] [blame] | 1752 | } else argv[j++] = argv[i]; |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1753 | } |
Denis Vlasenko | a4522c5 | 2008-03-17 08:46:43 +0000 | [diff] [blame] | 1754 | argv[j] = NULL; |
Denis Vlasenko | 9c99b62 | 2006-09-17 15:05:31 +0000 | [diff] [blame] | 1755 | argc = j; |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1756 | |
| 1757 | // Parse remaining options |
| 1758 | |
Denis Vlasenko | f732e96 | 2008-02-18 12:07:49 +0000 | [diff] [blame] | 1759 | #if ENABLE_FEATURE_MOUNT_VERBOSE |
| 1760 | opt_complementary = "vv"; // -v is a counter |
| 1761 | #endif |
| 1762 | opt = getopt32(argv, OPTION_STR, &opt_o, &fstype |
| 1763 | USE_FEATURE_MOUNT_VERBOSE(, &verbose)); |
Denis Vlasenko | b1d8e7d | 2008-02-16 23:28:42 +0000 | [diff] [blame] | 1764 | if (opt & OPT_o) append_mount_options(&cmdopts, opt_o); // -o |
| 1765 | if (opt & OPT_r) append_mount_options(&cmdopts, "ro"); // -r |
| 1766 | if (opt & OPT_w) append_mount_options(&cmdopts, "rw"); // -w |
Denis Vlasenko | 3bc59aa | 2006-09-17 15:04:01 +0000 | [diff] [blame] | 1767 | argv += optind; |
| 1768 | argc -= optind; |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1769 | |
| 1770 | // Three or more non-option arguments? Die with a usage message. |
| 1771 | |
Denis Vlasenko | 3bc59aa | 2006-09-17 15:04:01 +0000 | [diff] [blame] | 1772 | if (argc > 2) bb_show_usage(); |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1773 | |
| 1774 | // If we have no arguments, show currently mounted filesystems |
| 1775 | |
Denis Vlasenko | 3bc59aa | 2006-09-17 15:04:01 +0000 | [diff] [blame] | 1776 | if (!argc) { |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 1777 | if (!(opt & OPT_a)) { |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1778 | FILE *mountTable = setmntent(bb_path_mtab_file, "r"); |
| 1779 | |
Denis Vlasenko | 13c5a68 | 2006-10-16 22:39:51 +0000 | [diff] [blame] | 1780 | if (!mountTable) bb_error_msg_and_die("no %s", bb_path_mtab_file); |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1781 | |
Denis Vlasenko | 2535f12 | 2007-09-15 13:28:30 +0000 | [diff] [blame] | 1782 | while (getmntent_r(mountTable, &mtpair[0], getmntent_buf, |
Denis Vlasenko | d0a071a | 2008-03-17 09:33:45 +0000 | [diff] [blame] | 1783 | GETMNTENT_BUFSIZE)) |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1784 | { |
Denis Vlasenko | 13c5a68 | 2006-10-16 22:39:51 +0000 | [diff] [blame] | 1785 | // Don't show rootfs. FIXME: why?? |
Denis Vlasenko | 908d6b7 | 2006-12-18 23:07:42 +0000 | [diff] [blame] | 1786 | // util-linux 2.12a happily shows rootfs... |
| 1787 | //if (!strcmp(mtpair->mnt_fsname, "rootfs")) continue; |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1788 | |
| 1789 | if (!fstype || !strcmp(mtpair->mnt_type, fstype)) |
| 1790 | printf("%s on %s type %s (%s)\n", mtpair->mnt_fsname, |
| 1791 | mtpair->mnt_dir, mtpair->mnt_type, |
| 1792 | mtpair->mnt_opts); |
| 1793 | } |
| 1794 | if (ENABLE_FEATURE_CLEAN_UP) endmntent(mountTable); |
| 1795 | return EXIT_SUCCESS; |
| 1796 | } |
Denis Vlasenko | 3bc59aa | 2006-09-17 15:04:01 +0000 | [diff] [blame] | 1797 | } else storage_path = bb_simplify_path(argv[0]); |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1798 | |
| 1799 | // When we have two arguments, the second is the directory and we can |
| 1800 | // skip looking at fstab entirely. We can always abspath() the directory |
| 1801 | // argument when we get it. |
| 1802 | |
Denis Vlasenko | 3bc59aa | 2006-09-17 15:04:01 +0000 | [diff] [blame] | 1803 | if (argc == 2) { |
Denis Vlasenko | 13c5a68 | 2006-10-16 22:39:51 +0000 | [diff] [blame] | 1804 | if (nonroot) |
| 1805 | bb_error_msg_and_die(must_be_root); |
Denis Vlasenko | 3bc59aa | 2006-09-17 15:04:01 +0000 | [diff] [blame] | 1806 | mtpair->mnt_fsname = argv[0]; |
| 1807 | mtpair->mnt_dir = argv[1]; |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1808 | mtpair->mnt_type = fstype; |
| 1809 | mtpair->mnt_opts = cmdopts; |
Denis Vlasenko | de7684a | 2008-02-18 21:08:49 +0000 | [diff] [blame] | 1810 | if (ENABLE_FEATURE_MOUNT_LABEL) { |
| 1811 | resolve_mount_spec(&mtpair->mnt_fsname); |
| 1812 | } |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1813 | rc = singlemount(mtpair, 0); |
| 1814 | goto clean_up; |
| 1815 | } |
| 1816 | |
Denis Vlasenko | b413368 | 2008-02-18 13:05:38 +0000 | [diff] [blame] | 1817 | i = parse_mount_options(cmdopts, 0); // FIXME: should be "long", not "int" |
Denis Vlasenko | 13c5a68 | 2006-10-16 22:39:51 +0000 | [diff] [blame] | 1818 | if (nonroot && (i & ~MS_SILENT)) // Non-root users cannot specify flags |
| 1819 | bb_error_msg_and_die(must_be_root); |
Denis Vlasenko | 546cd18 | 2006-10-02 18:52:49 +0000 | [diff] [blame] | 1820 | |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1821 | // If we have a shared subtree flag, don't worry about fstab or mtab. |
Denis Vlasenko | 546cd18 | 2006-10-02 18:52:49 +0000 | [diff] [blame] | 1822 | |
Denis Vlasenko | 6cd2d2b | 2007-01-22 14:06:03 +0000 | [diff] [blame] | 1823 | if (ENABLE_FEATURE_MOUNT_FLAGS |
| 1824 | && (i & (MS_SHARED | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE)) |
| 1825 | ) { |
Denis Vlasenko | f732e96 | 2008-02-18 12:07:49 +0000 | [diff] [blame] | 1826 | rc = verbose_mount("", argv[0], "", i, ""); |
Denis Vlasenko | 0c97c9d | 2007-10-01 11:58:38 +0000 | [diff] [blame] | 1827 | if (rc) bb_simple_perror_msg_and_die(argv[0]); |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1828 | goto clean_up; |
| 1829 | } |
Denis Vlasenko | 9213a9e | 2006-09-17 16:28:10 +0000 | [diff] [blame] | 1830 | |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1831 | // Open either fstab or mtab |
| 1832 | |
Denis Vlasenko | 13c5a68 | 2006-10-16 22:39:51 +0000 | [diff] [blame] | 1833 | fstabname = "/etc/fstab"; |
| 1834 | if (i & MS_REMOUNT) { |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1835 | fstabname = bb_path_mtab_file; |
Denis Vlasenko | 13c5a68 | 2006-10-16 22:39:51 +0000 | [diff] [blame] | 1836 | } |
| 1837 | fstab = setmntent(fstabname, "r"); |
Denis Vlasenko | 8d474b5 | 2006-09-17 15:00:58 +0000 | [diff] [blame] | 1838 | if (!fstab) |
Denis Vlasenko | 85f9e32 | 2006-09-19 14:14:12 +0000 | [diff] [blame] | 1839 | bb_perror_msg_and_die("cannot read %s", fstabname); |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1840 | |
| 1841 | // Loop through entries until we find what we're looking for. |
| 1842 | |
Denis Vlasenko | 546cd18 | 2006-10-02 18:52:49 +0000 | [diff] [blame] | 1843 | memset(mtpair, 0, sizeof(mtpair)); |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1844 | for (;;) { |
Denis Vlasenko | 8d474b5 | 2006-09-17 15:00:58 +0000 | [diff] [blame] | 1845 | struct mntent *mtnext = (mtcur==mtpair ? mtpair+1 : mtpair); |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1846 | |
| 1847 | // Get next fstab entry |
| 1848 | |
Denis Vlasenko | 2535f12 | 2007-09-15 13:28:30 +0000 | [diff] [blame] | 1849 | if (!getmntent_r(fstab, mtcur, getmntent_buf |
Denis Vlasenko | d0a071a | 2008-03-17 09:33:45 +0000 | [diff] [blame] | 1850 | + (mtcur==mtpair ? GETMNTENT_BUFSIZE/2 : 0), |
| 1851 | GETMNTENT_BUFSIZE/2)) |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1852 | { |
| 1853 | // Were we looking for something specific? |
| 1854 | |
Denis Vlasenko | 3bc59aa | 2006-09-17 15:04:01 +0000 | [diff] [blame] | 1855 | if (argc) { |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1856 | |
| 1857 | // If we didn't find anything, complain. |
| 1858 | |
| 1859 | if (!mtnext->mnt_fsname) |
| 1860 | bb_error_msg_and_die("can't find %s in %s", |
Denis Vlasenko | 3bc59aa | 2006-09-17 15:04:01 +0000 | [diff] [blame] | 1861 | argv[0], fstabname); |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1862 | |
Denis Vlasenko | 13c5a68 | 2006-10-16 22:39:51 +0000 | [diff] [blame] | 1863 | mtcur = mtnext; |
| 1864 | if (nonroot) { |
| 1865 | // fstab must have "users" or "user" |
| 1866 | if (!(parse_mount_options(mtcur->mnt_opts, 0) & MOUNT_USERS)) |
| 1867 | bb_error_msg_and_die(must_be_root); |
| 1868 | } |
| 1869 | |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1870 | // Mount the last thing we found. |
| 1871 | |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1872 | mtcur->mnt_opts = xstrdup(mtcur->mnt_opts); |
Denis Vlasenko | 13c5a68 | 2006-10-16 22:39:51 +0000 | [diff] [blame] | 1873 | append_mount_options(&(mtcur->mnt_opts), cmdopts); |
Denis Vlasenko | de7684a | 2008-02-18 21:08:49 +0000 | [diff] [blame] | 1874 | if (ENABLE_FEATURE_MOUNT_LABEL) { |
| 1875 | resolve_mount_spec(&mtpair->mnt_fsname); |
| 1876 | } |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1877 | rc = singlemount(mtcur, 0); |
| 1878 | free(mtcur->mnt_opts); |
| 1879 | } |
| 1880 | goto clean_up; |
| 1881 | } |
| 1882 | |
| 1883 | /* If we're trying to mount something specific and this isn't it, |
| 1884 | * skip it. Note we must match both the exact text in fstab (ala |
| 1885 | * "proc") or a full path from root */ |
| 1886 | |
Denis Vlasenko | 3bc59aa | 2006-09-17 15:04:01 +0000 | [diff] [blame] | 1887 | if (argc) { |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1888 | |
| 1889 | // Is this what we're looking for? |
| 1890 | |
Denis Vlasenko | 13c5a68 | 2006-10-16 22:39:51 +0000 | [diff] [blame] | 1891 | if (strcmp(argv[0], mtcur->mnt_fsname) && |
| 1892 | strcmp(storage_path, mtcur->mnt_fsname) && |
| 1893 | strcmp(argv[0], mtcur->mnt_dir) && |
| 1894 | strcmp(storage_path, mtcur->mnt_dir)) continue; |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1895 | |
| 1896 | // Remember this entry. Something later may have overmounted |
| 1897 | // it, and we want the _last_ match. |
| 1898 | |
| 1899 | mtcur = mtnext; |
| 1900 | |
| 1901 | // If we're mounting all. |
| 1902 | |
| 1903 | } else { |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1904 | // Do we need to match a filesystem type? |
Denis Vlasenko | a4522c5 | 2008-03-17 08:46:43 +0000 | [diff] [blame] | 1905 | if (fstype && match_fstype(mtcur, fstype)) |
| 1906 | continue; |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1907 | |
| 1908 | // Skip noauto and swap anyway. |
| 1909 | |
Denis Vlasenko | a4522c5 | 2008-03-17 08:46:43 +0000 | [diff] [blame] | 1910 | if (parse_mount_options(mtcur->mnt_opts, 0) & (MOUNT_NOAUTO | MOUNT_SWAP)) |
| 1911 | continue; |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1912 | |
Denis Vlasenko | 13c5a68 | 2006-10-16 22:39:51 +0000 | [diff] [blame] | 1913 | // No, mount -a won't mount anything, |
| 1914 | // even user mounts, for mere humans. |
| 1915 | |
| 1916 | if (nonroot) |
| 1917 | bb_error_msg_and_die(must_be_root); |
| 1918 | |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1919 | // Mount this thing. |
Denis Vlasenko | a4522c5 | 2008-03-17 08:46:43 +0000 | [diff] [blame] | 1920 | if (ENABLE_FEATURE_MOUNT_LABEL) |
Denis Vlasenko | de7684a | 2008-02-18 21:08:49 +0000 | [diff] [blame] | 1921 | resolve_mount_spec(&mtpair->mnt_fsname); |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1922 | |
Denis Vlasenko | 666da5e | 2006-12-26 18:17:42 +0000 | [diff] [blame] | 1923 | // NFS mounts want this to be xrealloc-able |
| 1924 | mtcur->mnt_opts = xstrdup(mtcur->mnt_opts); |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1925 | if (singlemount(mtcur, 1)) { |
| 1926 | /* Count number of failed mounts */ |
| 1927 | rc++; |
| 1928 | } |
Denis Vlasenko | 666da5e | 2006-12-26 18:17:42 +0000 | [diff] [blame] | 1929 | free(mtcur->mnt_opts); |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1930 | } |
| 1931 | } |
| 1932 | if (ENABLE_FEATURE_CLEAN_UP) endmntent(fstab); |
| 1933 | |
Denis Vlasenko | 63430ae | 2007-10-29 19:18:39 +0000 | [diff] [blame] | 1934 | clean_up: |
Denis Vlasenko | 30a64cd | 2006-09-15 15:12:00 +0000 | [diff] [blame] | 1935 | |
| 1936 | if (ENABLE_FEATURE_CLEAN_UP) { |
| 1937 | free(storage_path); |
| 1938 | free(cmdopts); |
| 1939 | } |
| 1940 | |
| 1941 | return rc; |
| 1942 | } |