X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=lwext4%2Fext4_block_group.h;h=7d91ad5a5e286e711e8ebb8050a1c5fe4053b33a;hb=4bcfec78e66bb425cd8c8b865e7d8c950eecc069;hp=f2f60836b47946966d88d3237cc538a4af901f6c;hpb=d868262d36283441a727e1022414ac706abddb59;p=lwext4.git diff --git a/lwext4/ext4_block_group.h b/lwext4/ext4_block_group.h index f2f6083..7d91ad5 100644 --- a/lwext4/ext4_block_group.h +++ b/lwext4/ext4_block_group.h @@ -42,154 +42,230 @@ #ifndef EXT4_BLOCK_GROUP_H_ #define EXT4_BLOCK_GROUP_H_ - -#include -#include -#include +#include "ext4_config.h" +#include "ext4_types.h" +#include "ext4_super.h" #include #include +/**@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 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; + 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 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; } -static inline void ext4_bg_set_free_blocks_count(struct ext4_bgroup *bg, - struct ext4_sblock *s, uint32_t cnt) +/**@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) { - 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; } -static inline void ext4_bg_set_free_inodes_count(struct ext4_bgroup *bg, - struct ext4_sblock *s, uint32_t cnt) +/**@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) { - 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; } -static inline void ext4_bg_set_used_dirs_count(struct ext4_bgroup *bg, - struct ext4_sblock *s, uint32_t cnt) +/**@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) { - 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; } -static inline void ext4_bg_set_itable_unused(struct ext4_bgroup *bg, - struct ext4_sblock *s, uint32_t cnt) +/**@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) { - 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); } -static inline bool ext4_bg_has_flag(struct ext4_bgroup *bg, uint32_t f) +/**@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; } -static inline void ext4_bg_set_flag(struct ext4_bgroup *bg, uint32_t 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); } -static inline void ext4_bg_clear_flag(struct ext4_bgroup *bg, uint32_t f) +/**@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_ */