Add some helper functions to ext4_block_group.h

[lwext4.git] / lwext4 / ext4_balloc.h

diff --git a/lwext4/ext4_balloc.h b/lwext4/ext4_balloc.h
index 24cf470e8251dccf2f8e0afeea1acbb767ec2d04..48542dafb77b0d1549fe56b176bee62640217766 100644 (file)
--- a/lwext4/ext4_balloc.h
+++ b/lwext4/ext4_balloc.h
@@ -48,32 +48,52 @@
 #include <stdint.h>
 #include <stdbool.h>
 
-/**@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 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 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*/
-int ext4_balloc_free_block(struct ext4_inode_ref *inode_ref, uint32_t baddr);
+int ext4_balloc_free_block(struct ext4_inode_ref *inode_ref, ext4_fsblk_t baddr);
 
 /**@brief   Free blocks from inode.
  * @param   inode_ref inode reference
  * @param   baddr block address
  * @return  standard error code*/
-int ext4_balloc_free_blocks(struct ext4_inode_ref *inode_ref, uint32_t first,
-                            uint32_t count);
+int ext4_balloc_free_blocks(struct ext4_inode_ref *inode_ref, ext4_fsblk_t first,
+                           uint32_t count);
 
 /**@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);
+int ext4_balloc_alloc_block(struct ext4_inode_ref *inode_ref,
+                           ext4_fsblk_t goal,
+                           ext4_fsblk_t *baddr);
 
 /**@brief   Try allocate selected block.
  * @param   inode_ref inode reference
@@ -81,7 +101,7 @@ int ext4_balloc_alloc_block(struct ext4_inode_ref *inode_ref, uint32_t *baddr);
  * @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);
 
 #endif /* EXT4_BALLOC_H_ */