#ifndef _EXTENT_MAP_H
#define _EXTENT_MAP_H
-int init_ocfs2_extent_maps(void);
-void exit_ocfs2_extent_maps(void);
+struct ocfs2_extent_map_item {
+ unsigned int ei_cpos;
+ unsigned int ei_phys;
+ unsigned int ei_clusters;
+ unsigned int ei_flags;
+
+ struct list_head ei_list;
+};
+
+#define OCFS2_MAX_EXTENT_MAP_ITEMS 3
+struct ocfs2_extent_map {
+ unsigned int em_num_items;
+ struct list_head em_list;
+};
+
+void ocfs2_extent_map_init(struct inode *inode);
+void ocfs2_extent_map_trunc(struct inode *inode, unsigned int cluster);
+void ocfs2_extent_map_insert_rec(struct inode *inode,
+ struct ocfs2_extent_rec *rec);
+
+int ocfs2_get_clusters(struct inode *inode, u32 v_cluster, u32 *p_cluster,
+ u32 *num_clusters, unsigned int *extent_flags);
+int ocfs2_extent_map_get_blocks(struct inode *inode, u64 v_blkno, u64 *p_blkno,
+ u64 *ret_count, unsigned int *extent_flags);
+
+int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
+ u64 map_start, u64 map_len);
+
+int ocfs2_xattr_get_clusters(struct inode *inode, u32 v_cluster,
+ u32 *p_cluster, u32 *num_clusters,
+ struct ocfs2_extent_list *el);
+
+int ocfs2_read_virt_blocks(struct inode *inode, u64 v_block, int nr,
+ struct buffer_head *bhs[], int flags,
+ int (*validate)(struct super_block *sb,
+ struct buffer_head *bh));
+static inline int ocfs2_read_virt_block(struct inode *inode, u64 v_block,
+ struct buffer_head **bh,
+ int (*validate)(struct super_block *sb,
+ struct buffer_head *bh))
+{
+ int status = 0;
+
+ if (bh == NULL) {
+ printk("ocfs2: bh == NULL\n");
+ status = -EINVAL;
+ goto bail;
+ }
+
+ status = ocfs2_read_virt_blocks(inode, v_block, 1, bh, 0, validate);
+
+bail:
+ return status;
+}
-/*
- * EVERY CALL here except _init, _trunc, and _drop expects alloc_sem
- * to be held. The allocation cannot change at all while the map is
- * in the process of being updated.
- */
-int ocfs2_extent_map_init(struct inode *inode);
-int ocfs2_extent_map_append(struct inode *inode,
- struct ocfs2_extent_rec *rec,
- u32 new_clusters);
-int ocfs2_extent_map_get_blocks(struct inode *inode,
- u64 v_blkno, int count,
- u64 *p_blkno, int *ret_count);
-int ocfs2_extent_map_drop(struct inode *inode, u32 new_clusters);
-int ocfs2_extent_map_trunc(struct inode *inode, u32 new_clusters);
#endif /* _EXTENT_MAP_H */