btrfs: switch BTRFS_FS_* to enums

We can use simple enum for values that are not part of on-disk format:
internal filesystem states.

Reviewed-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index becfe1d..99f8fff 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -757,38 +757,37 @@ struct btrfs_swapfile_pin {
 
 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
 
-#define BTRFS_FS_BARRIER                       1
-#define BTRFS_FS_CLOSING_START                 2
-#define BTRFS_FS_CLOSING_DONE                  3
-#define BTRFS_FS_LOG_RECOVERING                        4
-#define BTRFS_FS_OPEN                          5
-#define BTRFS_FS_QUOTA_ENABLED                 6
-#define BTRFS_FS_UPDATE_UUID_TREE_GEN          9
-#define BTRFS_FS_CREATING_FREE_SPACE_TREE      10
-#define BTRFS_FS_BTREE_ERR                     11
-#define BTRFS_FS_LOG1_ERR                      12
-#define BTRFS_FS_LOG2_ERR                      13
-#define BTRFS_FS_QUOTA_OVERRIDE                        14
-/* Used to record internally whether fs has been frozen */
-#define BTRFS_FS_FROZEN                                15
-
-/*
- * Indicate that a whole-filesystem exclusive operation is running
- * (device replace, resize, device add/delete, balance)
- */
-#define BTRFS_FS_EXCL_OP                       16
-
-/*
- * To info transaction_kthread we need an immediate commit so it doesn't
- * need to wait for commit_interval
- */
-#define BTRFS_FS_NEED_ASYNC_COMMIT             17
-
-/*
- * Indicate that balance has been set up from the ioctl and is in the main
- * phase. The fs_info::balance_ctl is initialized.
- */
-#define BTRFS_FS_BALANCE_RUNNING               18
+enum {
+       BTRFS_FS_BARRIER,
+       BTRFS_FS_CLOSING_START,
+       BTRFS_FS_CLOSING_DONE,
+       BTRFS_FS_LOG_RECOVERING,
+       BTRFS_FS_OPEN,
+       BTRFS_FS_QUOTA_ENABLED,
+       BTRFS_FS_UPDATE_UUID_TREE_GEN,
+       BTRFS_FS_CREATING_FREE_SPACE_TREE,
+       BTRFS_FS_BTREE_ERR,
+       BTRFS_FS_LOG1_ERR,
+       BTRFS_FS_LOG2_ERR,
+       BTRFS_FS_QUOTA_OVERRIDE,
+       /* Used to record internally whether fs has been frozen */
+       BTRFS_FS_FROZEN,
+       /*
+        * Indicate that a whole-filesystem exclusive operation is running
+        * (device replace, resize, device add/delete, balance)
+        */
+       BTRFS_FS_EXCL_OP,
+       /*
+        * To info transaction_kthread we need an immediate commit so it
+        * doesn't need to wait for commit_interval
+        */
+       BTRFS_FS_NEED_ASYNC_COMMIT,
+       /*
+        * Indicate that balance has been set up from the ioctl and is in the
+        * main phase. The fs_info::balance_ctl is initialized.
+        */
+       BTRFS_FS_BALANCE_RUNNING,
+};
 
 struct btrfs_fs_info {
        u8 chunk_tree_uuid[BTRFS_UUID_SIZE];