Merge "fs_mgr: overlayfs: check if scratch device is ext4 dedupe"
diff --git a/fs_mgr/fs_mgr_overlayfs.cpp b/fs_mgr/fs_mgr_overlayfs.cpp
index 1fa1aa1..a7704de 100644
--- a/fs_mgr/fs_mgr_overlayfs.cpp
+++ b/fs_mgr/fs_mgr_overlayfs.cpp
@@ -809,15 +809,26 @@
entry.fs_type = mnt_type;
if ((mnt_type == "f2fs") && !f2fs) entry.fs_type = "ext4";
if ((mnt_type == "ext4") && !ext4) entry.fs_type = "f2fs";
- entry.flags = MS_NOATIME;
- if (readonly) {
- entry.flags |= MS_RDONLY;
- } else {
+ entry.flags = MS_NOATIME | MS_RDONLY;
+ auto mounted = true;
+ if (!readonly) {
+ if (entry.fs_type == "ext4") {
+ // check if ext4 de-dupe
+ entry.flags |= MS_RDONLY;
+ auto save_errno = errno;
+ mounted = fs_mgr_do_mount_one(entry) == 0;
+ if (mounted) {
+ mounted = !fs_mgr_has_shared_blocks(entry.mount_point, entry.blk_device);
+ fs_mgr_overlayfs_umount_scratch();
+ }
+ errno = save_errno;
+ }
+ entry.flags &= ~MS_RDONLY;
fs_mgr_set_blk_ro(device_path, false);
}
entry.fs_mgr_flags.check = true;
auto save_errno = errno;
- auto mounted = fs_mgr_do_mount_one(entry) == 0;
+ if (mounted) mounted = fs_mgr_do_mount_one(entry) == 0;
if (!mounted) {
if ((entry.fs_type == "f2fs") && ext4) {
entry.fs_type = "ext4";