• Anand Jain's avatar
    btrfs: reada: lock all seed/sprout devices in __reada_start_machine · 2fca0db0
    Anand Jain authored
    On an fs mounted using a sprout device, the seed fs_devices are
    maintained in a linked list under fs_info->fs_devices. Each seeds
    fs_devices also has device_list_mutex initialized to protect against the
    potential race with delete threads. But the delete thread (at
    btrfs_rm_device()) is holding the fs_info::fs_devices::device_list_mutex
    mutex which belongs to sprout device_list_mutex instead of seed
    device_list_mutex. Moreover, there aren't any significient benefits in
    using the seed::device_list_mutex instead of sprout::device_list_mutex.
    
    So this patch converts them of using the seed::device_list_mutex to
    sprout::device_list_mutex.
    Reviewed-by: default avatarNikolay Borisov <nborisov@suse.com>
    Signed-off-by: default avatarAnand Jain <anand.jain@oracle.com>
    Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
    2fca0db0
reada.c 24.6 KB