diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ext4/ext4_common.c | 82 | ||||
| -rw-r--r-- | fs/ext4/ext4_common.h | 12 |
2 files changed, 94 insertions, 0 deletions
diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c index 2df4f8b6d9..81740f8c66 100644 --- a/fs/ext4/ext4_common.c +++ b/fs/ext4/ext4_common.c @@ -47,6 +47,12 @@ struct ext2_inode *g_parent_inode; static int symlinknest; #if defined(CONFIG_EXT4_WRITE) +struct ext2_block_group *ext4fs_get_group_descriptor + (const struct ext_filesystem *fs, uint32_t bg_idx) +{ + return (struct ext2_block_group *)(fs->gdtable + (bg_idx * fs->gdsize)); +} + static inline void ext4fs_sb_free_inodes_dec(struct ext2_sblock *sb) { sb->free_inodes = cpu_to_le32(le32_to_cpu(sb->free_inodes) - 1); @@ -72,6 +78,82 @@ static inline void ext4fs_bg_itable_unused_dec(struct ext2_block_group *bg) bg->bg_itable_unused = cpu_to_le16(le16_to_cpu(bg->bg_itable_unused) - 1); } +uint64_t ext4fs_sb_get_free_blocks(const struct ext2_sblock *sb) +{ + uint64_t free_blocks = le32_to_cpu(sb->free_blocks); + free_blocks += (uint64_t)le32_to_cpu(sb->free_blocks_high) << 32; + return free_blocks; +} + +void ext4fs_sb_set_free_blocks(struct ext2_sblock *sb, uint64_t free_blocks) +{ + sb->free_blocks = cpu_to_le32(free_blocks & 0xffffffff); + sb->free_blocks_high = cpu_to_le16(free_blocks >> 32); +} + +uint32_t ext4fs_bg_get_free_blocks(const struct ext2_block_group *bg, + const struct ext_filesystem *fs) +{ + uint32_t free_blocks = le16_to_cpu(bg->free_blocks); + if (fs->gdsize == 64) + free_blocks += le16_to_cpu(bg->free_blocks_high) << 16; + return free_blocks; +} + +static inline +uint32_t ext4fs_bg_get_free_inodes(const struct ext2_block_group *bg, + const struct ext_filesystem *fs) +{ + uint32_t free_inodes = le16_to_cpu(bg->free_inodes); + if (fs->gdsize == 64) + free_inodes += le16_to_cpu(bg->free_inodes_high) << 16; + return free_inodes; +} + +static inline uint16_t ext4fs_bg_get_flags(const struct ext2_block_group *bg) +{ + return le16_to_cpu(bg->bg_flags); +} + +static inline void ext4fs_bg_set_flags(struct ext2_block_group *bg, + uint16_t flags) +{ + bg->bg_flags = cpu_to_le16(flags); +} + +/* Block number of the block bitmap */ +uint64_t ext4fs_bg_get_block_id(const struct ext2_block_group *bg, + const struct ext_filesystem *fs) +{ + uint64_t block_nr = le32_to_cpu(bg->block_id); + if (fs->gdsize == 64) + block_nr += (uint64_t)le32_to_cpu(bg->block_id_high) << 32; + return block_nr; +} + +/* Block number of the inode bitmap */ +uint64_t ext4fs_bg_get_inode_id(const struct ext2_block_group *bg, + const struct ext_filesystem *fs) +{ + uint64_t block_nr = le32_to_cpu(bg->inode_id); + if (fs->gdsize == 64) + block_nr += (uint64_t)le32_to_cpu(bg->inode_id_high) << 32; + return block_nr; +} +#endif + +/* Block number of the inode table */ +uint64_t ext4fs_bg_get_inode_table_id(const struct ext2_block_group *bg, + const struct ext_filesystem *fs) +{ + uint64_t block_nr = le32_to_cpu(bg->inode_table_id); + if (fs->gdsize == 64) + block_nr += + (uint64_t)le32_to_cpu(bg->inode_table_id_high) << 32; + return block_nr; +} + +#if defined(CONFIG_EXT4_WRITE) uint32_t ext4fs_div_roundup(uint32_t size, uint32_t n) { uint32_t res = size / n; diff --git a/fs/ext4/ext4_common.h b/fs/ext4/ext4_common.h index cc9d0c5a5f..99d49e6e55 100644 --- a/fs/ext4/ext4_common.h +++ b/fs/ext4/ext4_common.h @@ -74,5 +74,17 @@ void ext4fs_allocate_blocks(struct ext2_inode *file_inode, unsigned int total_remaining_blocks, unsigned int *total_no_of_block); void put_ext4(uint64_t off, void *buf, uint32_t size); +struct ext2_block_group *ext4fs_get_group_descriptor + (const struct ext_filesystem *fs, uint32_t bg_idx); +uint64_t ext4fs_bg_get_block_id(const struct ext2_block_group *bg, + const struct ext_filesystem *fs); +uint64_t ext4fs_bg_get_inode_id(const struct ext2_block_group *bg, + const struct ext_filesystem *fs); +uint64_t ext4fs_bg_get_inode_table_id(const struct ext2_block_group *bg, + const struct ext_filesystem *fs); +uint64_t ext4fs_sb_get_free_blocks(const struct ext2_sblock *sb); +void ext4fs_sb_set_free_blocks(struct ext2_sblock *sb, uint64_t free_blocks); +uint32_t ext4fs_bg_get_free_blocks(const struct ext2_block_group *bg, + const struct ext_filesystem *fs); #endif #endif |