#ifndef EXT4_FS_H_
#define EXT4_FS_H_
-#include <ext4_config.h>
-#include <ext4_types.h>
+#include "ext4_config.h"
+#include "ext4_types.h"
#include <stdint.h>
#include <stdbool.h>
+/**@brief Convert block address to relative index in block group.
+ * @param sb Superblock pointer
+ * @param baddr Block number to convert
+ * @return Relative number of block
+ */
+static inline uint32_t ext4_fs_baddr2_index_in_group(struct ext4_sblock *s,
+ uint32_t baddr)
+{
+ if (ext4_get32(s, first_data_block))
+ baddr--;
+
+ return baddr % ext4_get32(s, blocks_per_group);
+}
+
+/**@brief Convert relative block address in group to absolute address.
+ * @param s Superblock pointer
+ * @param index Relative block address
+ * @param bgid Block group
+ * @return Absolute block address
+ */
+static inline uint32_t ext4_fs_index_in_group2_baddr(struct ext4_sblock *s,
+ uint32_t index,
+ uint32_t bgid)
+{
+ if (ext4_get32(s, first_data_block))
+ index++;
+
+ return ext4_get32(s, blocks_per_group) * bgid + index;
+}
+
+/**@brief TODO: */
+static inline uint64_t ext4_fs_first_bg_block_no(struct ext4_sblock *s,
+ uint32_t bgid)
+{
+ return (uint64_t)bgid * ext4_get32(s, blocks_per_group) +
+ ext4_get32(s, first_data_block);
+}
+
/**@brief Initialize filesystem and read all needed data.
* @param fs Filesystem instance to be initialized
* @param bdev Identifier if device with the filesystem
*/
int ext4_fs_check_features(struct ext4_fs *fs, bool *read_only);
-/**@brief Convert block address to relative index in block group.
- * @param sb Superblock pointer
- * @param baddr Block number to convert
- * @return Relative number of block
- */
-uint32_t ext4_fs_baddr2_index_in_group(struct ext4_sblock *s, uint32_t baddr);
-
-/**@brief Convert relative block address in group to absolute address.
- * @param s Superblock pointer
- * @param index Relative block address
- * @param bgid Block group
- * @return Absolute block address
- */
-uint32_t ext4_fs_index_in_group2_baddr(struct ext4_sblock *s, uint32_t index,
- uint32_t bgid);
-
/**@brief Get reference to block group specified by index.
* @param fs Filesystem to find block group on
* @param bgid Index of block group to load
* @return Error code
*/
int ext4_fs_get_block_group_ref(struct ext4_fs *fs, uint32_t bgid,
- struct ext4_block_group_ref *ref);
+ struct ext4_block_group_ref *ref);
/**@brief Put reference to block group.
* @param ref Pointer for reference to be put back
* @return Error code
*/
int ext4_fs_get_inode_ref(struct ext4_fs *fs, uint32_t index,
- struct ext4_inode_ref *ref);
+ struct ext4_inode_ref *ref);
+
+/**@brief Reset blocks field of i-node.
+ * @param fs Filesystem to reset blocks field of i-inode on
+ * @param inode_ref ref Pointer for inode to be operated on
+ */
+void ext4_fs_inode_blocks_init(struct ext4_fs *fs, struct ext4_inode_ref *inode_ref);
/**@brief Put reference to i-node.
* @param ref Pointer for reference to be put back
/**@brief Allocate new i-node in the filesystem.
* @param fs Filesystem to allocated i-node on
* @param inode_ref Output pointer to return reference to allocated i-node
- * @param flags Flags to be set for newly created i-node
+ * @param filetype File type of newly created i-node
* @return Error code
*/
int ext4_fs_alloc_inode(struct ext4_fs *fs, struct ext4_inode_ref *inode_ref,
- bool is_directory);
+ int filetype);
/**@brief Release i-node and mark it as free.
* @param inode_ref I-node to be released
* @param new_size New size of inode (must be < current size)
* @return Error code
*/
-int ext4_fs_truncate_inode(struct ext4_inode_ref *inode_ref,
- uint64_t new_size);
+int ext4_fs_truncate_inode(struct ext4_inode_ref *inode_ref, uint64_t new_size);
/**@brief Get physical block address by logical index of the block.
* @param inode_ref I-node to read block address from
* @return Error code
*/
int ext4_fs_get_inode_data_block_index(struct ext4_inode_ref *inode_ref,
- uint64_t iblock, uint32_t *fblock);
+ uint64_t iblock, uint32_t *fblock);
-/**@brief Set physical block address for the block logical address into the i-node.
+/**@brief Set physical block address for the block logical address into the
+ * i-node.
* @param inode_ref I-node to set block address to
* @param iblock Logical index of block
* @param fblock Physical block address
* @return Error code
*/
int ext4_fs_set_inode_data_block_index(struct ext4_inode_ref *inode_ref,
- uint64_t iblock, uint32_t fblock);
+ uint64_t iblock, uint32_t fblock);
/**@brief Release data block from i-node
* @param inode_ref I-node to release block from
* @return Error code
*/
int ext4_fs_release_inode_block(struct ext4_inode_ref *inode_ref,
- uint32_t iblock);
+ uint32_t iblock);
/**@brief Append following logical block to the i-node.
* @param inode_ref I-node to append block to
* @return Error code
*/
int ext4_fs_append_inode_block(struct ext4_inode_ref *inode_ref,
- uint32_t *fblock, uint32_t *iblock);
+ uint32_t *fblock, uint32_t *iblock);
+
+/**@brief Increment inode link count.
+ * @param inode none handle
+ */
+void ext4_fs_inode_links_count_inc(struct ext4_inode_ref *inode_ref);
+
+/**@brief Decrement inode link count.
+ * @param inode none handle
+ */
+void ext4_fs_inode_links_count_dec(struct ext4_inode_ref *inode_ref);
#endif /* EXT4_FS_H_ */
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