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    Btrfs: cleanup reloc roots properly on error · b37b39cd
    Josef Bacik 提交于
    I was hitting the BUG_ON() at the end of merge_reloc_roots() because we were
    aborting the transaction at some point previously and then getting an error when
    we tried to drop the reloc root.  I fixed btrfs_drop_snapshot to re-add us to
    the dead roots list if we failed, but this isn't the right thing to do for reloc
    roots since it uses root->root_list for it's own stuff in order to know what
    needs to be cleaned up.  So fix btrfs_drop_snapshot to only do the re-add if we
    aren't dropping for reloc, and handle errors from merge_reloc_root() by dropping
    the reloc root we are processing since it won't be on the list of roots to
    cleanup.  With this patch my reproducer no longer panics.  Thanks,
    Signed-off-by: NJosef Bacik <jbacik@fusionio.com>
    Signed-off-by: NChris Mason <chris.mason@fusionio.com>
    b37b39cd
relocation.c 108.3 KB