fs: btrfs: Crossport extent-io.[ch] from btrfs-progs
This brings the extent_io_tree infrastructure, with which we can finally
bring in proper btrfs_fs_info structure to ctree.h.
With read/write_extent_buffer() implemented we also backport
read/write_eb_member() to ctree.h.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 02125e5..c7528d1 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -11,8 +11,10 @@
#include <common.h>
#include <compiler.h>
+#include <linux/rbtree.h>
#include "kernel-shared/btrfs_tree.h"
#include "compat.h"
+#include "extent-io.h"
#define BTRFS_MAX_MIRRORS 3
@@ -48,6 +50,18 @@
#define BTRFS_FS_STATE_DEV_REPLACING 3
#define BTRFS_FS_STATE_DUMMY_FS_INFO 4
+#define read_eb_member(eb, ptr, type, member, result) ( \
+ read_extent_buffer(eb, (char *)(result), \
+ ((unsigned long)(ptr)) + \
+ offsetof(type, member), \
+ sizeof(((type *)0)->member)))
+
+#define write_eb_member(eb, ptr, type, member, result) ( \
+ write_extent_buffer(eb, (char *)(result), \
+ ((unsigned long)(ptr)) + \
+ offsetof(type, member), \
+ sizeof(((type *)0)->member)))
+
#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
static inline u##bits btrfs_##name(const type *s) \
{ \
@@ -75,6 +89,47 @@
u64 root_dirid;
};
+struct btrfs_mapping_tree {
+ struct cache_tree cache_tree;
+};
+
+struct btrfs_device;
+struct btrfs_fs_info {
+ u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
+ u8 *new_chunk_tree_uuid;
+ struct btrfs_root *fs_root;
+ struct btrfs_root *tree_root;
+ struct btrfs_root *chunk_root;
+ struct btrfs_root *csum_root;
+
+ struct rb_root fs_root_tree;
+
+ struct extent_io_tree extent_cache;
+ struct extent_io_tree free_space_cache;
+ struct extent_io_tree pinned_extents;
+ struct extent_io_tree extent_ins;
+ struct extent_io_tree *excluded_extents;
+
+ struct rb_root block_group_cache_tree;
+ /* logical->physical extent mapping */
+ struct btrfs_mapping_tree mapping_tree;
+
+ u64 generation;
+ u64 last_trans_committed;
+
+ struct btrfs_super_block *super_copy;
+
+ u64 super_bytenr;
+
+ /* Only support one device yet */
+ struct btrfs_devvice *dev;
+
+ /* Cached block sizes */
+ u32 nodesize;
+ u32 sectorsize;
+ u32 stripesize;
+};
+
int btrfs_comp_keys(struct btrfs_key *, struct btrfs_key *);
int btrfs_comp_keys_type(struct btrfs_key *, struct btrfs_key *);
int btrfs_bin_search(union btrfs_tree_node *, struct btrfs_key *, int *);