When the user or system calls the BTRFS_IOC_SCAN_DEV,
ioctl this patch will make sure it is added to the device
list and set it as spare.
This operation will be same when BTRFS_IOC_DEVICES_READY
as well since BTRFS_IOC_DEVICES_READY ioctl has been doing
that by legacy.
Signed-off-by: Anand Jain <anand.jain@xxxxxxxxxx>
---
fs/btrfs/volumes.c | 4 ++++
fs/btrfs/volumes.h | 2 ++
2 files changed, 6 insertions(+)
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index fcc9e57..28f549d 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -526,6 +526,10 @@ static noinline int device_list_add(const char *path,
if (IS_ERR(fs_devices))
return PTR_ERR(fs_devices);
+ if (btrfs_super_incompat_flags(disk_super) &
+ BTRFS_FEATURE_INCOMPAT_SPARE_DEV)
+ fs_devices->spare = 1;
+
list_add(&fs_devices->list, &fs_uuids);
device = NULL;
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 827371e..3d995b7 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -278,6 +278,8 @@ struct btrfs_fs_devices {
struct kobject fsid_kobj;
struct kobject *device_dir_kobj;
struct completion kobj_unregister;
+
+ int spare;
};
#define BTRFS_BIO_INLINE_CSUM_SIZE 64
--
2.4.1
--
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