diff options
| author | Josef Bacik <jbacik@fusionio.com> | 2012-06-21 16:03:58 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@fusionio.com> | 2012-07-23 16:27:42 -0400 |
| commit | 02db0844beffc1c4e99d750be58ffb3ed95d6d62 (patch) | |
| tree | ee82fa926f2900e24a1ca76eab6a85a32f453898 /fs/btrfs/ioctl.h | |
| parent | 96c3f4331a8c1cd0a58307e4ac7e73e09d7dab23 (diff) | |
Btrfs: add DEVICE_READY ioctl
This will be used in conjunction with btrfs device ready <dev>. This is
needed for initrd's to have a nice and lightweight way to tell if all of the
devices needed for a file system are in the cache currently. This keeps
them from having to do mount+sleep loops waiting for devices to show up.
Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Diffstat (limited to 'fs/btrfs/ioctl.h')
| -rw-r--r-- | fs/btrfs/ioctl.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h index 021c55ed8ae..4e3e5d342a2 100644 --- a/fs/btrfs/ioctl.h +++ b/fs/btrfs/ioctl.h @@ -363,7 +363,8 @@ struct btrfs_ioctl_get_dev_stats { struct btrfs_ioctl_ino_path_args) #define BTRFS_IOC_LOGICAL_INO _IOWR(BTRFS_IOCTL_MAGIC, 36, \ struct btrfs_ioctl_ino_path_args) +#define BTRFS_IOC_DEVICES_READY _IOR(BTRFS_IOCTL_MAGIC, 39, \ + struct btrfs_ioctl_vol_args) #define BTRFS_IOC_GET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 52, \ struct btrfs_ioctl_get_dev_stats) - #endif |