#ifndef EXT4_BLOCK_GROUP_H_
#define EXT4_BLOCK_GROUP_H_
+#ifdef __cplusplus
+extern "C" {
+#endif
-#include <ext4_config.h>
-#include <ext4_types.h>
-#include <ext4_super.h>
+#include "ext4_config.h"
+#include "ext4_types.h"
+#include "ext4_super.h"
#include <stdint.h>
#include <stdbool.h>
+/**@brief Get address of block with data block bitmap.
+ * @param bg pointer to block group
+ * @param s pointer to superblock
+ * @return Address of block with block bitmap
+ */
static inline uint64_t ext4_bg_get_block_bitmap(struct ext4_bgroup *bg,
- struct ext4_sblock *s)
+ struct ext4_sblock *s)
{
- uint64_t v = to_le32(bg->block_bitmap_lo);
+ uint64_t v = to_le32(bg->block_bitmap_lo);
- if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
- v |= (uint64_t) to_le32(bg->block_bitmap_hi) << 32;
+ if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
+ v |= (uint64_t)to_le32(bg->block_bitmap_hi) << 32;
- return v;
+ return v;
}
+/**@brief Set address of block with data block bitmap.
+ * @param bg pointer to block group
+ * @param s pointer to superblock
+ * @param blk block to set
+ * @return Address of block with block bitmap
+ */
+static inline void ext4_bg_set_block_bitmap(struct ext4_bgroup *bg,
+ struct ext4_sblock *s, uint64_t blk)
+{
+
+ bg->block_bitmap_lo = to_le32(blk);
+ if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
+ bg->block_bitmap_hi = to_le32(blk >> 32);
+
+}
+
+/**@brief Get address of block with i-node bitmap.
+ * @param bg Pointer to block group
+ * @param s Pointer to superblock
+ * @return Address of block with i-node bitmap
+ */
static inline uint64_t ext4_bg_get_inode_bitmap(struct ext4_bgroup *bg,
- struct ext4_sblock *s)
+ struct ext4_sblock *s)
{
- uint64_t v = to_le32(bg->inode_bitmap_lo);
+ uint64_t v = to_le32(bg->inode_bitmap_lo);
+
+ if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
+ v |= (uint64_t)to_le32(bg->inode_bitmap_hi) << 32;
- if (ext4_sb_get_desc_size(s)> EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
- v |= (uint64_t) to_le32(bg->inode_bitmap_hi) << 32;
+ return v;
+}
+
+/**@brief Set address of block with i-node bitmap.
+ * @param bg Pointer to block group
+ * @param s Pointer to superblock
+ * @param blk block to set
+ * @return Address of block with i-node bitmap
+ */
+static inline void ext4_bg_set_inode_bitmap(struct ext4_bgroup *bg,
+ struct ext4_sblock *s, uint64_t blk)
+{
+ bg->inode_bitmap_lo = to_le32(blk);
+ if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
+ bg->inode_bitmap_hi = to_le32(blk >> 32);
- return v;
}
-static inline uint64_t ext4_bg_get_inode_table_first_block(
- struct ext4_bgroup *bg, struct ext4_sblock *s)
+
+/**@brief Get address of the first block of the i-node table.
+ * @param bg Pointer to block group
+ * @param s Pointer to superblock
+ * @return Address of first block of i-node table
+ */
+static inline uint64_t
+ext4_bg_get_inode_table_first_block(struct ext4_bgroup *bg,
+ struct ext4_sblock *s)
{
- uint64_t v = to_le32(bg->inode_table_first_block_lo);
+ uint64_t v = to_le32(bg->inode_table_first_block_lo);
- if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
- v |= (uint64_t) to_le32(bg->inode_table_first_block_hi) << 32;
+ if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
+ v |= (uint64_t)to_le32(bg->inode_table_first_block_hi) << 32;
- return v;
+ return v;
}
+/**@brief Set address of the first block of the i-node table.
+ * @param bg Pointer to block group
+ * @param s Pointer to superblock
+ * @param blk block to set
+ * @return Address of first block of i-node table
+ */
+static inline void
+ext4_bg_set_inode_table_first_block(struct ext4_bgroup *bg,
+ struct ext4_sblock *s, uint64_t blk)
+{
+ bg->inode_table_first_block_lo = to_le32(blk);
+ if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
+ bg->inode_table_first_block_hi = to_le32(blk >> 32);
+}
+
+/**@brief Get number of free blocks in block group.
+ * @param bg Pointer to block group
+ * @param sb Pointer to superblock
+ * @return Number of free blocks in block group
+ */
static inline uint32_t ext4_bg_get_free_blocks_count(struct ext4_bgroup *bg,
- struct ext4_sblock *s)
+ struct ext4_sblock *s)
{
- uint32_t v = to_le16(bg->free_blocks_count_lo);
+ uint32_t v = to_le16(bg->free_blocks_count_lo);
- if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
- v |= (uint32_t) to_le16(bg->free_blocks_count_hi) << 16;
+ if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
+ v |= (uint32_t)to_le16(bg->free_blocks_count_hi) << 16;
- return v;
+ return v;
}
+/**@brief Set number of free blocks in block group.
+ * @param bg Pointer to block group
+ * @param s Pointer to superblock
+ * @param cnt Number of free blocks in block group
+ */
static inline void ext4_bg_set_free_blocks_count(struct ext4_bgroup *bg,
- struct ext4_sblock *s, uint32_t cnt)
+ struct ext4_sblock *s,
+ uint32_t cnt)
{
- bg->free_blocks_count_lo = to_le16((cnt << 16) >> 16);
- if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
- bg->free_blocks_count_hi = to_le16(cnt >> 16);
+ bg->free_blocks_count_lo = to_le16((cnt << 16) >> 16);
+ if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
+ bg->free_blocks_count_hi = to_le16(cnt >> 16);
}
+/**@brief Get number of free i-nodes in block group.
+ * @param bg Pointer to block group
+ * @param s Pointer to superblock
+ * @return Number of free i-nodes in block group
+ */
static inline uint32_t ext4_bg_get_free_inodes_count(struct ext4_bgroup *bg,
- struct ext4_sblock *s)
+ struct ext4_sblock *s)
{
- uint32_t v = to_le16(bg->free_inodes_count_lo);
+ uint32_t v = to_le16(bg->free_inodes_count_lo);
- if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
- v |= (uint32_t) to_le16(bg->free_inodes_count_hi) << 16;
+ if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
+ v |= (uint32_t)to_le16(bg->free_inodes_count_hi) << 16;
- return v;
+ return v;
}
+/**@brief Set number of free i-nodes in block group.
+ * @param bg Pointer to block group
+ * @param s Pointer to superblock
+ * @param cnt Number of free i-nodes in block group
+ */
static inline void ext4_bg_set_free_inodes_count(struct ext4_bgroup *bg,
- struct ext4_sblock *s, uint32_t cnt)
+ struct ext4_sblock *s,
+ uint32_t cnt)
{
- bg->free_inodes_count_lo = to_le16((cnt << 16) >> 16);
- if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
- bg->free_inodes_count_hi = to_le16(cnt >> 16);
+ bg->free_inodes_count_lo = to_le16((cnt << 16) >> 16);
+ if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
+ bg->free_inodes_count_hi = to_le16(cnt >> 16);
}
-
+/**@brief Get number of used directories in block group.
+ * @param bg Pointer to block group
+ * @param s Pointer to superblock
+ * @return Number of used directories in block group
+ */
static inline uint32_t ext4_bg_get_used_dirs_count(struct ext4_bgroup *bg,
- struct ext4_sblock *s)
+ struct ext4_sblock *s)
{
- uint32_t v = to_le16(bg->used_dirs_count_lo);
+ uint32_t v = to_le16(bg->used_dirs_count_lo);
- if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
- v |= (uint32_t) to_le16(bg->used_dirs_count_hi) << 16;
+ if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
+ v |= (uint32_t)to_le16(bg->used_dirs_count_hi) << 16;
- return v;
+ return v;
}
+/**@brief Set number of used directories in block group.
+ * @param bg Pointer to block group
+ * @param s Pointer to superblock
+ * @param cnt Number of used directories in block group
+ */
static inline void ext4_bg_set_used_dirs_count(struct ext4_bgroup *bg,
- struct ext4_sblock *s, uint32_t cnt)
+ struct ext4_sblock *s,
+ uint32_t cnt)
{
- bg->used_dirs_count_lo = to_le16((cnt << 16) >> 16);
- if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
- bg->used_dirs_count_hi = to_le16(cnt >> 16);
+ bg->used_dirs_count_lo = to_le16((cnt << 16) >> 16);
+ if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
+ bg->used_dirs_count_hi = to_le16(cnt >> 16);
}
-
+/**@brief Get number of unused i-nodes.
+ * @param bg Pointer to block group
+ * @param s Pointer to superblock
+ * @return Number of unused i-nodes
+ */
static inline uint32_t ext4_bg_get_itable_unused(struct ext4_bgroup *bg,
- struct ext4_sblock *s)
+ struct ext4_sblock *s)
{
- uint32_t v = to_le16(bg->itable_unused_lo);
+ uint32_t v = to_le16(bg->itable_unused_lo);
- if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
- v |= (uint32_t) to_le16(bg->itable_unused_hi) << 16;
+ if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
+ v |= (uint32_t)to_le16(bg->itable_unused_hi) << 16;
- return v;
+ return v;
}
+/**@brief Set number of unused i-nodes.
+ * @param bg Pointer to block group
+ * @param s Pointer to superblock
+ * @param cnt Number of unused i-nodes
+ */
static inline void ext4_bg_set_itable_unused(struct ext4_bgroup *bg,
- struct ext4_sblock *s, uint32_t cnt)
+ struct ext4_sblock *s,
+ uint32_t cnt)
{
- bg->itable_unused_lo = to_le16((cnt << 16) >> 16);
- if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
- bg->itable_unused_hi = to_le16(cnt >> 16);
+ bg->itable_unused_lo = to_le16((cnt << 16) >> 16);
+ if (ext4_sb_get_desc_size(s) > EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE)
+ bg->itable_unused_hi = to_le16(cnt >> 16);
}
-
-static inline void ext4_bg_set_checksum(struct ext4_bgroup *bg,
- uint16_t crc)
+/**@brief Set checksum of block group.
+ * @param bg Pointer to block group
+ * @param crc Cheksum of block group
+ */
+static inline void ext4_bg_set_checksum(struct ext4_bgroup *bg, uint16_t crc)
{
- bg->checksum = to_le16(crc);
+ bg->checksum = to_le16(crc);
}
+/**@brief Check if block group has a flag.
+ * @param bg Pointer to block group
+ * @param flag Flag to be checked
+ * @return True if flag is set to 1
+ */
static inline bool ext4_bg_has_flag(struct ext4_bgroup *bg, uint32_t f)
{
- return to_le16(bg->flags) & f;
+ return to_le16(bg->flags) & f;
}
+/**@brief Set flag of block group.
+ * @param bg Pointer to block group
+ * @param flag Flag to be set
+ */
static inline void ext4_bg_set_flag(struct ext4_bgroup *bg, uint32_t f)
{
- uint16_t flags = to_le16(bg->flags);
- flags |= f;
- bg->flags = to_le16(flags);
+ uint16_t flags = to_le16(bg->flags);
+ flags |= f;
+ bg->flags = to_le16(flags);
}
+/**@brief Clear flag of block group.
+ * @param bg Pointer to block group
+ * @param flag Flag to be cleared
+ */
static inline void ext4_bg_clear_flag(struct ext4_bgroup *bg, uint32_t f)
{
- uint16_t flags = to_le16(bg->flags);
- flags &= ~f;
- bg->flags = to_le16(flags);
+ uint16_t flags = to_le16(bg->flags);
+ flags &= ~f;
+ bg->flags = to_le16(flags);
}
-
+/**@brief Calculate CRC16 of the block group.
+ * @param crc Init value
+ * @param buffer Input buffer
+ * @param len Sizeof input buffer
+ * @return Computed CRC16*/
uint16_t ext4_bg_crc16(uint16_t crc, const uint8_t *buffer, size_t len);
#endif /* EXT4_BLOCK_GROUP_H_ */
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