2 * Copyright (C) 2014 John Crispin <blogic@openwrt.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License version 2.1
6 * as published by the Free Software Foundation
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
14 #include <sys/mount.h>
18 #include <libubox/ulog.h>
20 #include "libfstools/libfstools.h"
21 #include "libfstools/volume.h"
24 * Called in the early (PREINIT) stage, when we immediately need some writable
28 start(int argc, char *argv[1])
31 struct volume *data = volume_find("rootfs_data");
33 if (!getenv("PREINIT"))
37 root = volume_find("rootfs");
39 ULOG_NOTE("mounting /dev/root\n");
40 mount("/dev/root", "/", NULL, MS_NOATIME | MS_REMOUNT, 0);
44 * Before trying to mount and use "rootfs_data" let's check if there is
45 * extroot configured. Following call will handle reading config from
46 * the "rootfs_data" on its own.
49 if (!mount_extroot()) {
50 ULOG_NOTE("switched to extroot\n");
54 /* There isn't extroot, so just try to mount "rootfs_data" */
55 switch (volume_identify(data)) {
57 ULOG_WARN("no usable overlay filesystem found, using tmpfs overlay\n");
62 * Filesystem isn't ready yet and we are in the preinit, so we
63 * can't afford waiting for it. Use tmpfs for now and handle it
64 * properly in the "done" call.
66 ULOG_NOTE("jffs2 not ready yet, using temporary tmpfs overlay\n");
83 stop(int argc, char *argv[1])
85 if (!getenv("SHUTDOWN"))
92 * Called at the end of init, it can wait for filesystem if needed.
95 done(int argc, char *argv[1])
97 struct volume *v = volume_find("rootfs_data");
102 switch (volume_identify(v)) {
105 return jffs2_switch(v);
109 fs_state_set("/overlay", FS_STATE_READY);
116 int main(int argc, char **argv)
119 return start(argc, argv);
120 if (!strcmp(argv[1], "ram"))
122 if (!strcmp(argv[1], "stop"))
123 return stop(argc, argv);
124 if (!strcmp(argv[1], "done"))
125 return done(argc, argv);