/*
* Copyright (c) 2013 Grzegorz Kostka (kostka.grzegorz@gmail.com)
*
- *
* HelenOS:
* Copyright (c) 2012 Martin Sucha
* Copyright (c) 2012 Frantisek Princ
#ifndef EXT4_BALLOC_H_
#define EXT4_BALLOC_H_
-#include <ext4_config.h>
-#include <ext4_types.h>
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "ext4_config.h"
+#include "ext4_types.h"
#include <stdint.h>
#include <stdbool.h>
+/**@brief Compute number of block group from block address.
+ * @param sb superblock pointer.
+ * @param baddr Absolute address of block.
+ * @return Block group index
+ */
+uint32_t ext4_balloc_get_bgid_of_block(struct ext4_sblock *s,
+ ext4_fsblk_t baddr);
+
+/**@brief Compute the starting block address of a block group
+ * @param sb superblock pointer.
+ * @param bgid block group index
+ * @return Block address
+ */
+ext4_fsblk_t ext4_balloc_get_block_of_bgid(struct ext4_sblock *s,
+ uint32_t bgid);
-/**@brief Get first datablock in block group
- * @param s superblock descriptor
- * @param bg_ref block group reference
- * @return block id of the first datablock in block group*/
-uint32_t ext4_balloc_get_first_data_block_in_group(struct ext4_sblock *s,
- struct ext4_block_group_ref * bg_ref);
+/**@brief Calculate and set checksum of block bitmap.
+ * @param sb superblock pointer.
+ * @param bg block group
+ * @param bitmap bitmap buffer
+ */
+void ext4_balloc_set_bitmap_csum(struct ext4_sblock *sb,
+ struct ext4_bgroup *bg,
+ void *bitmap);
-/**@brief Free block from inode.
- * @param inode_ref inode reference
- * @param baddr block address
- * @return standard error code*/
+/**@brief Free block from inode.
+ * @param inode_ref inode reference
+ * @param baddr block address
+ * @return standard error code*/
int ext4_balloc_free_block(struct ext4_inode_ref *inode_ref,
- uint32_t baddr);
+ ext4_fsblk_t baddr);
-/**@brief Free blocks from inode.
- * @param inode_ref inode reference
- * @param baddr block address
- * @return standard error code*/
+/**@brief Free blocks from inode.
+ * @param inode_ref inode reference
+ * @param first block address
+ * @param count block count
+ * @return standard error code*/
int ext4_balloc_free_blocks(struct ext4_inode_ref *inode_ref,
- uint32_t first, uint32_t count);
+ ext4_fsblk_t first, uint32_t count);
-/**@brief Allocate block procedure.
- * @param inode_ref inode reference
- * @param baddr allocated block address
- * @return standard error code*/
+/**@brief Allocate block procedure.
+ * @param inode_ref inode reference
+ * @param goal
+ * @param baddr allocated block address
+ * @return standard error code*/
int ext4_balloc_alloc_block(struct ext4_inode_ref *inode_ref,
- uint32_t *baddr);
+ ext4_fsblk_t goal,
+ ext4_fsblk_t *baddr);
-/**@brief Try allocate selected block.
- * @param inode_ref inode reference
- * @param baddr block address to allocate
- * @param free if baddr is not allocated
- * @return standard error code*/
+/**@brief Try allocate selected block.
+ * @param inode_ref inode reference
+ * @param baddr block address to allocate
+ * @param free if baddr is not allocated
+ * @return standard error code*/
int ext4_balloc_try_alloc_block(struct ext4_inode_ref *inode_ref,
- uint32_t baddr, bool *free);
+ ext4_fsblk_t baddr, bool *free);
+
+#ifdef __cplusplus
+}
+#endif
#endif /* EXT4_BALLOC_H_ */
/**
* @}
*/
-