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authorDavid Sterba <dsterba@suse.com>2016-02-17 15:24:14 +0100
committerDavid Sterba <dsterba@suse.com>2016-02-23 12:56:21 +0100
commitc5868f8362f5620302c66848d400368f8d4b45f8 (patch)
tree23238ca3d341afa5016af29323107f477c9f3c63 /fs/btrfs/super.c
parent388f7b1d6e8ca06762e2454d28d6c3c55ad0fe95 (diff)
btrfs: add GET_SUPPORTED_FEATURES to the control device ioctls
The control device is accessible when no filesystem is mounted and we may want to query features supported by the module. This is already possible using the sysfs files, this ioctl is for parity and convenience. Reviewed-by: Anand Jain <anand.jain@oracle.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/super.c')
-rw-r--r--fs/btrfs/super.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index d41e09fe8e38..dda6f64dfd73 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -2163,6 +2163,10 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd,
break;
ret = !(fs_devices->num_devices == fs_devices->total_devices);
break;
+ case BTRFS_IOC_GET_SUPPORTED_FEATURES:
+ ret = btrfs_ioctl_get_supported_features(NULL,
+ (void __user*)arg);
+ break;
}
kfree(vol);