#include <stdio.h>
#include <stdlib.h>
+#include <libubox/ulog.h>
+
#include "libfstools/libfstools.h"
#include "libfstools/volume.h"
+/*
+ * Called in the early (PREINIT) stage, when we immediately need some writable
+ * filesystem.
+ */
static int
start(int argc, char *argv[1])
{
- struct volume *v = volume_find("rootfs_data");
+ struct volume *root;
+ struct volume *data = volume_find("rootfs_data");
if (!getenv("PREINIT"))
return -1;
- if (!v) {
- v = volume_find("rootfs");
- volume_init(v);
- fprintf(stderr, "mounting /dev/root\n");
+ if (!data) {
+ root = volume_find("rootfs");
+ volume_init(root);
+ ULOG_NOTE("mounting /dev/root\n");
mount("/dev/root", "/", NULL, MS_NOATIME | MS_REMOUNT, 0);
- return 0;
}
+ /*
+ * Before trying to mount and use "rootfs_data" let's check if there is
+ * extroot configured. Following call will handle reading config from
+ * the "rootfs_data" on its own.
+ */
extroot_prefix = "";
if (!mount_extroot()) {
- fprintf(stderr, "fs-state: switched to extroot\n");
+ ULOG_NOTE("switched to extroot\n");
return 0;
}
- switch (volume_identify(v)) {
+ /* There isn't extroot, so just try to mount "rootfs_data" */
+ switch (volume_identify(data)) {
case FS_NONE:
+ ULOG_WARN("no usable overlay filesystem found, using tmpfs overlay\n");
+ return ramoverlay();
+
case FS_DEADCODE:
+ /*
+ * Filesystem isn't ready yet and we are in the preinit, so we
+ * can't afford waiting for it. Use tmpfs for now and handle it
+ * properly in the "done" call.
+ */
+ ULOG_NOTE("jffs2 not ready yet, using temporary tmpfs overlay\n");
return ramoverlay();
case FS_JFFS2:
case FS_UBIFS:
- mount_overlay();
+ mount_overlay(data);
break;
case FS_SNAPSHOT:
- mount_snapshot();
+ mount_snapshot(data);
break;
}
return 0;
}
+/*
+ * Called at the end of init, it can wait for filesystem if needed.
+ */
static int
done(int argc, char *argv[1])
{
switch (volume_identify(v)) {
case FS_NONE:
case FS_DEADCODE:
- return jffs2_switch(argc, argv);
+ return jffs2_switch(v);
}
return 0;