• liubo's avatar
    Btrfs: forced readonly mounts on errors · acce952b
    liubo authored
    This patch comes from "Forced readonly mounts on errors" ideas.
    As we know, this is the first step in being more fault tolerant of disk
    corruptions instead of just using BUG() statements.
    The major content:
    - add a framework for generating errors that should result in filesystems
      going readonly.
    - keep FS state in disk super block.
    - make sure that all of resource will be freed and released at umount time.
    - make sure that fter FS is forced readonly on error, there will be no more
      disk change before FS is corrected. For this, we should stop write operation.
    After this patch is applied, the conversion from BUG() to such a framework can
    happen incrementally.
    Signed-off-by: default avatarLiu Bo <liubo2009@cn.fujitsu.com>
    Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
disk-io.h 4.61 KB