#define SWITCH_JFFS2 "/tmp/.switch_jffs2"
+static bool keep_sysupgrade;
+
+static int
+handle_rmdir(const char *dir)
+{
+ struct dirent *dt;
+ struct stat st;
+ DIR *d;
+ int fd;
+
+ d = opendir(dir);
+ if (!d)
+ return -1;
+
+ fd = dirfd(d);
+
+ while ((dt = readdir(d)) != NULL) {
+ if (fstatat(fd, dt->d_name, &st, AT_SYMLINK_NOFOLLOW) || S_ISDIR(st.st_mode))
+ continue;
+
+ if (keep_sysupgrade && !strcmp(dt->d_name, "sysupgrade.tgz"))
+ continue;
+
+ unlinkat(fd, dt->d_name, 0);
+ }
+
+ closedir(d);
+ rmdir(dir);
+
+ return 0;
+}
+
void
foreachdir(const char *dir, int (*cb)(const char*))
{
if (dir[strlen(dir) - 1] == '/')
snprintf(globdir, 256, "%s*", dir);
else
- snprintf(globdir, 256, "%s/*", dir);
+ snprintf(globdir, 256, "%s/*", dir); /**/
if (!glob(globdir, GLOB_NOESCAPE | GLOB_MARK | GLOB_ONLYDIR, NULL, &gl))
for (j = 0; j < gl.gl_pathc; j++)
cb(dir);
}
+void
+overlay_delete(const char *dir, bool _keep_sysupgrade)
+{
+ keep_sysupgrade = _keep_sysupgrade;
+ foreachdir(dir, handle_rmdir);
+}
+
static int
overlay_mount(struct volume *v, char *fs)
{
if (mkdir("/tmp/overlay", 0755)) {
- fprintf(stderr, "failed to mkdir /tmp/overlay: %s\n", strerror(errno));
+ ULOG_ERR("failed to mkdir /tmp/overlay: %s\n", strerror(errno));
return -1;
}
if (mount(v->blk, "/tmp/overlay", fs, MS_NOATIME, NULL)) {
- fprintf(stderr, "failed to mount -t %s %s /tmp/overlay: %s\n", fs, v->blk, strerror(errno));
+ ULOG_ERR("failed to mount -t %s %s /tmp/overlay: %s\n", fs, v->blk, strerror(errno));
return -1;
}
int ret;
if (!stat(SWITCH_JFFS2, &s)) {
- fprintf(stderr, "jffs2 switch already running\n");
+ ULOG_ERR("jffs2 switch already running\n");
return -1;
}
ret = mount(v->blk, "/rom/overlay", "jffs2", MS_NOATIME, NULL);
unlink("/tmp/.switch_jffs2");
if (ret) {
- fprintf(stderr, "failed - mount -t jffs2 %s /rom/overlay: %s\n", v->blk, strerror(errno));
+ ULOG_ERR("failed - mount -t jffs2 %s /rom/overlay: %s\n", v->blk, strerror(errno));
return -1;
}
if (mount("none", "/", NULL, MS_NOATIME | MS_REMOUNT, 0)) {
- fprintf(stderr, "failed - mount -o remount,ro none: %s\n", strerror(errno));
+ ULOG_ERR("failed - mount -o remount,ro none: %s\n", strerror(errno));
return -1;
}
- system("cp -a /tmp/root/* /rom/overlay");
+ system("cp -a /tmp/root/* /rom/overlay"); /**/
if (pivot("/rom", "/mnt")) {
- fprintf(stderr, "failed - pivot /rom /mnt: %s\n", strerror(errno));
+ ULOG_ERR("failed - pivot /rom /mnt: %s\n", strerror(errno));
return -1;
}
if (mount_move("/mnt", "/tmp/root", "")) {
- fprintf(stderr, "failed - mount -o move /mnt /tmp/root %s\n", strerror(errno));
+ ULOG_ERR("failed - mount -o move /mnt /tmp/root %s\n", strerror(errno));
return -1;
}
}
int
-jffs2_switch(int argc, char **argv)
+jffs2_switch(struct volume *v)
{
- struct volume *v;
char *mp;
int ret = -1;
return -1;
if (find_filesystem("overlay")) {
- fprintf(stderr, "overlayfs not found\n");
+ ULOG_ERR("overlayfs not supported by kernel\n");
return ret;
}
- v = volume_find("rootfs_data");
- mp = find_mount_point(v->blk, NULL);
+ mp = find_mount_point(v->blk, 0);
if (mp) {
- fprintf(stderr, "rootfs_data:%s is already mounted as %s\n", v->blk, mp);
+ ULOG_ERR("rootfs_data:%s is already mounted as %s\n", v->blk, mp);
return -1;
}
switch (volume_identify(v)) {
case FS_NONE:
- fprintf(stderr, "no jffs2 marker found\n");
+ ULOG_ERR("no jffs2 marker found\n");
/* fall through */
case FS_DEADCODE:
ret = switch2jffs(v);
if (!ret) {
- fprintf(stderr, "doing fo cleanup\n");
+ ULOG_INFO("performing overlay whiteout\n");
umount2("/tmp/root", MNT_DETACH);
foreachdir("/overlay/", handle_whiteout);
}
if (ret)
break;
if (mount_move("/tmp", "", "/overlay") || fopivot("/overlay", "/rom")) {
- fprintf(stderr, "switching to jffs2 failed\n");
+ ULOG_ERR("switching to jffs2 failed\n");
ret = -1;
}
break;
ret = overlay_mount(v, "ubifs");
if (ret)
break;
- if (mount_move("/tmp", "", "/overlay") || fopivot("/overlay", "/rom")) {
- fprintf(stderr, "switching to ubifs failed\n");
+ if (mount_move("/tmp", "", "/overlay") || fopivot("/overlay", "/rom")) {
+ ULOG_ERR("switching to ubifs failed\n");
ret = -1;
}
break;
return ret;
}
-static int overlay_mount_fs(void)
+static int overlay_mount_fs(struct volume *v)
{
- struct volume *v;
char *fstype;
if (mkdir("/tmp/overlay", 0755)) {
- fprintf(stderr, "failed to mkdir /tmp/overlay: %s\n", strerror(errno));
- return -1;
- }
-
- v = volume_find("rootfs_data");
- if (!v) {
- fprintf(stderr, "rootfs_data does not exist\n");
+ ULOG_ERR("failed to mkdir /tmp/overlay: %s\n", strerror(errno));
return -1;
}
break;
}
+ volume_init(v);
+
if (mount(v->blk, "/tmp/overlay", fstype, MS_NOATIME, NULL)) {
- fprintf(stderr, "failed to mount -t %s %s /tmp/overlay: %s\n",
- fstype, v->blk, strerror(errno));
+ ULOG_ERR("failed to mount -t %s %s /tmp/overlay: %s\n",
+ fstype, v->blk, strerror(errno));
return -1;
}
- volume_init(v);
-
return -1;
}
-int mount_overlay(void)
+int mount_overlay(struct volume *v)
{
- struct volume *v = volume_find("rootfs_data");;
char *mp;
if (!v)
return -1;
- mp = find_mount_point(v->blk, NULL);
+ mp = find_mount_point(v->blk, 0);
if (mp) {
- fprintf(stderr, "rootfs_data:%s is already mounted as %s\n", v->blk, mp);
+ ULOG_ERR("rootfs_data:%s is already mounted as %s\n", v->blk, mp);
return -1;
}
- overlay_mount_fs();
+ overlay_mount_fs(v);
extroot_prefix = "/tmp/overlay";
if (!mount_extroot()) {
- fprintf(stderr, "switched to extroot\n");
+ ULOG_INFO("switched to extroot\n");
return 0;
}
- fprintf(stderr, "switching to overlay\n");
+ ULOG_INFO("switching to jffs2 overlay\n");
if (mount_move("/tmp", "", "/overlay") || fopivot("/overlay", "/rom")) {
- fprintf(stderr, "switching to jffs2 failed - fallback to ramoverlay\n");
+ ULOG_ERR("switching to jffs2 failed - fallback to ramoverlay\n");
return ramoverlay();
}