#ifndef EXT4_SUPER_H_
#define EXT4_SUPER_H_
+#ifdef __cplusplus
+extern "C" {
+#endif
-#include <ext4_config.h>
-#include <ext4_types.h>
+#include "ext4_config.h"
+#include "ext4_types.h"
+/**@brief Blocks count get stored in superblock.
+ * @param s superblock descriptor
+ * @return count of blocks*/
+static inline uint64_t ext4_sb_get_blocks_cnt(struct ext4_sblock *s)
+{
+ return ((uint64_t)to_le32(s->blocks_count_hi) << 32) |
+ to_le32(s->blocks_count_lo);
+}
-/****************************Unstandard access to superblock*****************/
-
-/**@brief Blocks count get stored in superblock.
- * @param s superblock descriptor
- * @return count of blocks*/
-static inline uint64_t ext4_sb_get_blocks_cnt(struct ext4_sblock *s)
+/**@brief Blocks count set in superblock.
+ * @param s superblock descriptor
+ * @return count of blocks*/
+static inline void ext4_sb_set_blocks_cnt(struct ext4_sblock *s, uint64_t cnt)
{
- return ((uint64_t) to_le32(s->blocks_count_hi) << 32) |
- to_le32(s->blocks_count_lo);
+ s->blocks_count_lo = to_le32((cnt << 32) >> 32);
+ s->blocks_count_hi = to_le32(cnt >> 32);
}
-/**@brief Free blocks count get stored in superblock.
- * @param s superblock descriptor
- * @return free blocks*/
-static inline uint64_t ext4_sb_get_free_blocks_cnt(struct ext4_sblock *s)
+/**@brief Free blocks count get stored in superblock.
+ * @param s superblock descriptor
+ * @return free blocks*/
+static inline uint64_t ext4_sb_get_free_blocks_cnt(struct ext4_sblock *s)
{
- return ((uint64_t) to_le32(s->free_blocks_count_hi) << 32) |
- to_le32(s->free_blocks_count_lo);
+ return ((uint64_t)to_le32(s->free_blocks_count_hi) << 32) |
+ to_le32(s->free_blocks_count_lo);
}
-/**@brief Free blocks count set.
- * @param s superblock descriptor
- * @param cnt new value of free blocks*/
-static inline void ext4_sb_set_free_blocks_cnt(struct ext4_sblock *s,
- uint64_t cnt)
+/**@brief Free blocks count set.
+ * @param s superblock descriptor
+ * @param cnt new value of free blocks*/
+static inline void ext4_sb_set_free_blocks_cnt(struct ext4_sblock *s,
+ uint64_t cnt)
{
- s->free_blocks_count_lo = to_le32((cnt << 32) >> 32);
- s->free_blocks_count_hi = to_le32(cnt >> 32);
+ s->free_blocks_count_lo = to_le32((cnt << 32) >> 32);
+ s->free_blocks_count_hi = to_le32(cnt >> 32);
}
-/**@brief Block size get from superblock.
- * @param s superblock descriptor
- * @return block size in bytes*/
-static inline uint32_t ext4_sb_get_block_size(struct ext4_sblock *s)
+/**@brief Block size get from superblock.
+ * @param s superblock descriptor
+ * @return block size in bytes*/
+static inline uint32_t ext4_sb_get_block_size(struct ext4_sblock *s)
{
- return 1024 << to_le32(s->log_block_size);
+ return 1024 << to_le32(s->log_block_size);
}
-/**@brief Block group descriptor size.
- * @param s superblock descriptor
- * @return block group descriptor size in bytes*/
+/**@brief Block group descriptor size.
+ * @param s superblock descriptor
+ * @return block group descriptor size in bytes*/
static inline uint16_t ext4_sb_get_desc_size(struct ext4_sblock *s)
{
- uint16_t size = to_le16(s->desc_size);
+ uint16_t size = to_le16(s->desc_size);
- return size < EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE ?
- EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE : size;
+ return size < EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE
+ ? EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE
+ : size;
}
/*************************Flags and features*********************************/
-/**@brief Support check of flag.
- * @param s superblock descriptor
- * @param v flag to check
- * @return true if flag is supported*/
+/**@brief Support check of flag.
+ * @param s superblock descriptor
+ * @param v flag to check
+ * @return true if flag is supported*/
static inline bool ext4_sb_check_flag(struct ext4_sblock *s, uint32_t v)
{
- return to_le32(s->flags) & v;
+ return to_le32(s->flags) & v;
+}
+
+/**@brief Support check of feature compatible.
+ * @param s superblock descriptor
+ * @param v feature to check
+ * @return true if feature is supported*/
+static inline bool ext4_sb_feature_com(struct ext4_sblock *s, uint32_t v)
+{
+ return to_le32(s->features_compatible) & v;
}
-/**@brief Support check of feature compatible.
- * @param s superblock descriptor
- * @param v feature to check
- * @return true if feature is supported*/
-static inline bool ext4_sb_check_feature_compatible(struct ext4_sblock *s,
- uint32_t v)
+/**@brief Support check of feature incompatible.
+ * @param s superblock descriptor
+ * @param v feature to check
+ * @return true if feature is supported*/
+static inline bool ext4_sb_feature_incom(struct ext4_sblock *s, uint32_t v)
{
- return to_le32(s->features_compatible) & v;
+ return to_le32(s->features_incompatible) & v;
}
+/**@brief Support check of read only flag.
+ * @param s superblock descriptor
+ * @param v flag to check
+ * @return true if flag is supported*/
+static inline bool ext4_sb_feature_ro_com(struct ext4_sblock *s, uint32_t v)
+{
+ return to_le32(s->features_read_only) & v;
+}
-/**@brief Support check of feature incompatible.
- * @param s superblock descriptor
- * @param v feature to check
- * @return true if feature is supported*/
-static inline bool ext4_sb_check_feature_incompatible(struct ext4_sblock *s,
- uint32_t v)
+/**@brief Block group to flex group.
+ * @param s superblock descriptor
+ * @param block_group block group
+ * @return flex group id*/
+static inline uint32_t ext4_sb_bg_to_flex(struct ext4_sblock *s,
+ uint32_t block_group)
{
- return to_le32(s->features_incompatible) & v;
+ return block_group >> to_le32(s->log_groups_per_flex);
}
+/**@brief Flex block group size.
+ * @param s superblock descriptor
+ * @return flex bg size*/
+static inline uint32_t ext4_sb_flex_bg_size(struct ext4_sblock *s)
+{
+ return 1 << to_le32(s->log_groups_per_flex);
+}
-/**@brief Support check of read only flag.
- * @param s superblock descriptor
- * @param v flag to check
- * @return true if flag is supported*/
-static inline bool ext4_sb_check_read_only(struct ext4_sblock *s, uint32_t v)
+/**@brief Return first meta block group id.
+ * @param s superblock descriptor
+ * @return first meta_bg id */
+static inline uint32_t ext4_sb_first_meta_bg(struct ext4_sblock *s)
{
- return to_le32(s->features_read_only) & v;
+ return to_le32(s->first_meta_bg);
}
/**************************More complex functions****************************/
-/**@brief Returns a block group count.
- * @param s superblock descriptor
- * @return count of block groups*/
+/**@brief Returns a block group count.
+ * @param s superblock descriptor
+ * @return count of block groups*/
uint32_t ext4_block_group_cnt(struct ext4_sblock *s);
-/**@brief Returns block count in block group
+/**@brief Returns block count in block group
* (last block group may have less blocks)
- * @param s superblock descriptor
- * @param bgid block group id
- * @return blocks count*/
+ * @param s superblock descriptor
+ * @param bgid block group id
+ * @return blocks count*/
uint32_t ext4_blocks_in_group_cnt(struct ext4_sblock *s, uint32_t bgid);
-/**@brief Returns inodes count in block group
+/**@brief Returns inodes count in block group
* (last block group may have less inodes)
- * @param s superblock descriptor
- * @param bgid block group id
- * @return inodes count*/
+ * @param s superblock descriptor
+ * @param bgid block group id
+ * @return inodes count*/
uint32_t ext4_inodes_in_group_cnt(struct ext4_sblock *s, uint32_t bgid);
/***************************Read/write/check superblock**********************/
-/**@brief Superblock write.
- * @param bdev block device descriptor.
- * @param s superblock descruptor
- * @return Standard error code */
-int ext4_sb_write(struct ext4_blockdev *bdev, struct ext4_sblock *s);
-
-/**@brief Superblock read.
- * @param bdev block device descriptor.
- * @param s superblock descruptor
- * @return Standard error code */
-int ext4_sb_read(struct ext4_blockdev *bdev, struct ext4_sblock *s);
-
-/**@brief Superblock simple validation.
- * @param s superblock dsecriptor
- * @return true if OK*/
+/**@brief Superblock write.
+ * @param bdev block device descriptor.
+ * @param s superblock descriptor
+ * @return Standard error code */
+int ext4_sb_write(struct ext4_blockdev *bdev, struct ext4_sblock *s);
+
+/**@brief Superblock read.
+ * @param bdev block device descriptor.
+ * @param s superblock descriptor
+ * @return Standard error code */
+int ext4_sb_read(struct ext4_blockdev *bdev, struct ext4_sblock *s);
+
+/**@brief Superblock simple validation.
+ * @param s superblock descriptor
+ * @return true if OK*/
bool ext4_sb_check(struct ext4_sblock *s);
+/**@brief Superblock presence in block group.
+ * @param s superblock descriptor
+ * @param block_group block group id
+ * @return true if block group has superblock*/
+bool ext4_sb_is_super_in_bg(struct ext4_sblock *s, uint32_t block_group);
+
+/**@brief TODO:*/
+bool ext4_sb_sparse(uint32_t group);
+
+/**@brief TODO:*/
+uint32_t ext4_bg_num_gdb(struct ext4_sblock *s, uint32_t group);
+
+/**@brief TODO:*/
+uint32_t ext4_num_base_meta_clusters(struct ext4_sblock *s,
+ uint32_t block_group);
+
+#ifdef __cplusplus
+}
+#endif
#endif /* EXT4_SUPER_H_ */
/**
* @}
*/
-
projects / lwext4.git / blobdiff