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])
30 struct volume *root = volume_find("rootfs");
31 struct volume *data = volume_find("rootfs_data");
33 if (data && find_mount_point(data->blk, 0))
36 if (root && find_mount_point(root->blk, 0))
41 ULOG_NOTE("mounting /dev/root\n");
42 mount("/dev/root", "/", NULL, MS_NOATIME | MS_REMOUNT, 0);
46 * Before trying to mount and use "rootfs_data" let's check if there is
47 * extroot configured. Following call will handle reading config from
48 * the "rootfs_data" on its own.
51 if (!mount_extroot()) {
52 ULOG_NOTE("switched to extroot\n");
56 /* There isn't extroot, so just try to mount "rootfs_data" */
57 switch (volume_identify(data)) {
59 ULOG_WARN("no usable overlay filesystem found, using tmpfs overlay\n");
64 * Filesystem isn't ready yet and we are in the preinit, so we
65 * can't afford waiting for it. Use tmpfs for now and handle it
66 * properly in the "done" call.
68 ULOG_NOTE("jffs2 not ready yet, using temporary tmpfs overlay\n");
85 stop(int argc, char *argv[1])
87 if (!getenv("SHUTDOWN"))
94 * Called at the end of init, it can wait for filesystem if needed.
97 done(int argc, char *argv[1])
99 struct volume *v = volume_find("rootfs_data");
104 switch (volume_identify(v)) {
107 return jffs2_switch(v);
111 fs_state_set("/overlay", FS_STATE_READY);
118 int main(int argc, char **argv)
121 return start(argc, argv);
122 if (!strcmp(argv[1], "ram"))
124 if (!strcmp(argv[1], "stop"))
125 return stop(argc, argv);
126 if (!strcmp(argv[1], "done"))
127 return done(argc, argv);