Btrfs: Add support for device scanning and detection ioctls
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index acf22ad..7556f83 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -37,7 +37,7 @@
extern struct kmem_cache *btrfs_bit_radix_cachep;
extern struct kmem_cache *btrfs_path_cachep;
-#define BTRFS_MAGIC "_B4RfS_M"
+#define BTRFS_MAGIC "_B5RfS_M"
#define BTRFS_MAX_LEVEL 8
@@ -238,6 +238,7 @@
__le64 total_bytes;
__le64 bytes_used;
__le64 root_dir_objectid;
+ __le64 num_devices;
__le32 sectorsize;
__le32 nodesize;
__le32 leafsize;
@@ -440,6 +441,7 @@
};
struct btrfs_device;
+struct btrfs_fs_devices;
struct btrfs_fs_info {
u8 fsid[BTRFS_FSID_SIZE];
struct btrfs_root *extent_root;
@@ -489,7 +491,7 @@
u64 total_pinned;
struct list_head dirty_cowonly_roots;
- struct list_head devices;
+ struct btrfs_fs_devices *fs_devices;
struct list_head space_info;
spinlock_t delalloc_lock;
spinlock_t new_trans_lock;
@@ -677,6 +679,19 @@
BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
+ total_bytes, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
+ bytes_used, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
+ io_align, 32);
+BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
+ io_width, 32);
+BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
+ sector_size, 32);
+BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
+
static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
{
return (char *)d + offsetof(struct btrfs_dev_item, uuid);
@@ -1106,6 +1121,8 @@
stripesize, 32);
BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
root_dir_objectid, 64);
+BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
+ num_devices, 64);
static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
{