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Commit d84ccd64 authored by Treehugger Robot's avatar Treehugger Robot Committed by Automerger Merge Worker
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Merge "fs_mgr: overlayfs: check if scratch device is ext4 dedupe" am: a22e74cd 

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1234486

Change-Id: I493d05c652ac85f07032f5fabe38b80a93fa89d4
parents 2702ea29 a22e74cd

fs_mgr/fs_mgr_overlayfs.cpp

+16 −5
Original line number Diff line number Diff line
@@ -809,15 +809,26 @@ bool fs_mgr_overlayfs_mount_scratch(const std::string& device_path, const std::s 
    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_NOATIME | MS_RDONLY;

    auto mounted = true;

    if (!readonly) {

        if (entry.fs_type == "ext4") {

            // check if ext4 de-dupe

            entry.flags |= MS_RDONLY;

    } else {

            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";