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authorJosef Bacik <jbacik@fusionio.com>2012-06-21 16:03:58 -0400
committerChris Mason <chris.mason@fusionio.com>2012-07-23 16:27:42 -0400
commit02db0844beffc1c4e99d750be58ffb3ed95d6d62 (patch)
treeee82fa926f2900e24a1ca76eab6a85a32f453898 /fs/btrfs/volumes.h
parent96c3f4331a8c1cd0a58307e4ac7e73e09d7dab23 (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/volumes.h')
-rw-r--r--fs/btrfs/volumes.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index e404414a95a9..5479325987b3 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -126,6 +126,7 @@ struct btrfs_fs_devices {
u64 missing_devices;
u64 total_rw_bytes;
u64 num_can_discard;
+ u64 total_devices;
struct block_device *latest_bdev;
/* all of the devices in the FS, protected by a mutex