Hi, instead of extending the BTRFS_IOCTL_DEV_INFO ioctl, why do not add a field under /sys/fs/btrfs/<UUID>/ ? Something like /sys/fs/btrfs/<UUID>/missing_device
BR G.Baroncelli On 05/06/2014 08:33 AM, Qu Wenruo wrote: > Original btrfs will not detection any missing device since there is > no notification mechanism for fs layer to detect missing device in > block layer. > > However we don't really need to notify fs layer upon dev remove, > probing in dev_info/rm_dev ioctl is good enough since they are the > only two ioctls caring about missing device. > > This patchset will do ioctl time missing dev detection and return > device missing status in dev_info ioctl using a new member in > btrfs_ioctl_dev_info_args with a backward compatible method. > > Cc: Anand Jain <anand.j...@oracle.com> Qu Wenruo (2): btrfs: Add > missing device check in dev_info/rm_dev ioctl btrfs: Add new member > of btrfs_ioctl_dev_info_args. > > fs/btrfs/ioctl.c | 4 ++++ fs/btrfs/volumes.c | 25 > ++++++++++++++++++++++++- fs/btrfs/volumes.h | 2 ++ > include/uapi/linux/btrfs.h | 5 ++++- 4 files changed, 34 > insertions(+), 2 deletions(-) > -- gpg @keyserver.linux.it: Goffredo Baroncelli (kreijackATinwind.it> Key fingerprint BBF5 1610 0B64 DAC6 5F7D 17B2 0EDA 9B37 8B82 E0B5 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
