#include <ext4_types.h>
#include <ext4_inode.h>
-
-/*
- * Array of ext4_ext_path contains path to some extent.
- * Creation/lookup routines use it for traversal/splitting/etc.
- * Truncate uses it to simulate recursive walking.
- */
-struct ext4_extent_path {
- ext4_fsblk_t p_block;
- struct ext4_block block;
- int32_t depth;
- int32_t maxdepth;
- struct ext4_extent_header *header;
- struct ext4_extent_index *index;
- struct ext4_extent *extent;
-
-};
-
-
-/**@brief Get logical number of the block covered by extent.
- * @param extent Extent to load number from
- * @return Logical number of the first block covered by extent */
-static inline uint32_t ext4_extent_get_first_block(struct ext4_extent *extent)
-{
- return to_le32(extent->first_block);
-}
-
-/**@brief Set logical number of the first block covered by extent.
- * @param extent Extent to set number to
- * @param iblock Logical number of the first block covered by extent */
-static inline void ext4_extent_set_first_block(struct ext4_extent *extent,
- uint32_t iblock)
-{
- extent->first_block = to_le32(iblock);
-}
-
-/**@brief Get number of blocks covered by extent.
- * @param extent Extent to load count from
- * @return Number of blocks covered by extent */
-static inline uint16_t ext4_extent_get_block_count(struct ext4_extent *extent)
-{
- if (EXT4_EXT_IS_UNWRITTEN(extent))
- return EXT4_EXT_GET_LEN_UNWRITTEN(extent);
- else
- return EXT4_EXT_GET_LEN(extent);
-}
-/**@brief Set number of blocks covered by extent.
- * @param extent Extent to load count from
- * @param count Number of blocks covered by extent
- * @param unwritten Whether the extent is unwritten or not */
-static inline void ext4_extent_set_block_count(struct ext4_extent *extent,
- uint16_t count, bool unwritten)
-{
- EXT4_EXT_SET_LEN(extent, count);
- if (unwritten)
- EXT4_EXT_SET_UNWRITTEN(extent);
-}
-
-/**@brief Get physical number of the first block covered by extent.
- * @param extent Extent to load number
- * @return Physical number of the first block covered by extent */
-static inline uint64_t ext4_extent_get_start(struct ext4_extent *extent)
-{
- return ((uint64_t)to_le16(extent->start_hi)) << 32 |
- ((uint64_t)to_le32(extent->start_lo));
-}
-
-
-/**@brief Set physical number of the first block covered by extent.
- * @param extent Extent to load number
- * @param fblock Physical number of the first block covered by extent */
-static inline void ext4_extent_set_start(struct ext4_extent *extent, uint64_t fblock)
-{
- extent->start_lo = to_le32((fblock << 32) >> 32);
- extent->start_hi = to_le16((uint16_t)(fblock >> 32));
-}
-
-
-/**@brief Get logical number of the block covered by extent index.
- * @param index Extent index to load number from
- * @return Logical number of the first block covered by extent index */
-static inline uint32_t
-ext4_extent_index_get_first_block(struct ext4_extent_index *index)
-{
- return to_le32(index->first_block);
-}
-
-/**@brief Set logical number of the block covered by extent index.
- * @param index Extent index to set number to
- * @param iblock Logical number of the first block covered by extent index */
-static inline void
-ext4_extent_index_set_first_block(struct ext4_extent_index *index,
- uint32_t iblock)
-{
- index->first_block = to_le32(iblock);
-}
-
-/**@brief Get physical number of block where the child node is located.
- * @param index Extent index to load number from
- * @return Physical number of the block with child node */
-static inline uint64_t
-ext4_extent_index_get_leaf(struct ext4_extent_index *index)
-{
- return ((uint64_t)to_le16(index->leaf_hi)) << 32 |
- ((uint64_t)to_le32(index->leaf_lo));
-}
-
-/**@brief Set physical number of block where the child node is located.
- * @param index Extent index to set number to
- * @param fblock Ohysical number of the block with child node */
-static inline void ext4_extent_index_set_leaf(struct ext4_extent_index *index,
- uint64_t fblock)
-{
- index->leaf_lo = to_le32((fblock << 32) >> 32);
- index->leaf_hi = to_le16((uint16_t)(fblock >> 32));
-}
-
-/**@brief Get magic value from extent header.
- * @param header Extent header to load value from
- * @return Magic value of extent header */
-static inline uint16_t
-ext4_extent_header_get_magic(struct ext4_extent_header *header)
-{
- return to_le16(header->magic);
-}
-
-/**@brief Set magic value to extent header.
- * @param header Extent header to set value to
- * @param magic Magic value of extent header */
-static inline void ext4_extent_header_set_magic(struct ext4_extent_header *header,
- uint16_t magic)
-{
- header->magic = to_le16(magic);
-}
-
-/**@brief Get number of entries from extent header
- * @param header Extent header to get value from
- * @return Number of entries covered by extent header */
-static inline uint16_t
-ext4_extent_header_get_entries_count(struct ext4_extent_header *header)
-{
- return to_le16(header->entries_count);
-}
-
-/**@brief Set number of entries to extent header
- * @param header Extent header to set value to
- * @param count Number of entries covered by extent header */
-static inline void
-ext4_extent_header_set_entries_count(struct ext4_extent_header *header,
- uint16_t count)
-{
- header->entries_count = to_le16(count);
-}
-
-/**@brief Get maximum number of entries from extent header
- * @param header Extent header to get value from
- * @return Maximum number of entries covered by extent header */
-static inline uint16_t
-ext4_extent_header_get_max_entries_count(struct ext4_extent_header *header)
-{
- return to_le16(header->max_entries_count);
-}
-
-/**@brief Set maximum number of entries to extent header
- * @param header Extent header to set value to
- * @param max_count Maximum number of entries covered by extent header */
-static inline void
-ext4_extent_header_set_max_entries_count(struct ext4_extent_header *header,
- uint16_t max_count)
-{
- header->max_entries_count = to_le16(max_count);
-}
-
-/**@brief Get depth of extent subtree.
- * @param header Extent header to get value from
- * @return Depth of extent subtree */
-static inline uint16_t
-ext4_extent_header_get_depth(struct ext4_extent_header *header)
-{
- return to_le16(header->depth);
-}
-
-/**@brief Set depth of extent subtree.
- * @param header Extent header to set value to
- * @param depth Depth of extent subtree */
-static inline void
-ext4_extent_header_set_depth(struct ext4_extent_header *header, uint16_t depth)
-{
- header->depth = to_le16(depth);
-}
-
-/**@brief Get generation from extent header
- * @param header Extent header to get value from
- * @return Generation */
-static inline uint32_t
-ext4_extent_header_get_generation(struct ext4_extent_header *header)
-{
- return to_le32(header->generation);
-}
-
-/**@brief Set generation to extent header
- * @param header Extent header to set value to
- * @param generation Generation */
-static inline void
-ext4_extent_header_set_generation(struct ext4_extent_header *header,
- uint32_t generation)
-{
- header->generation = to_le32(generation);
-}
-
-/******************************************************************************/
-
-/**TODO: */
-static inline void ext4_extent_tree_init(struct ext4_inode_ref *inode_ref)
-{
- /* Initialize extent root header */
- struct ext4_extent_header *header =
- ext4_inode_get_extent_header(inode_ref->inode);
- ext4_extent_header_set_depth(header, 0);
- ext4_extent_header_set_entries_count(header, 0);
- ext4_extent_header_set_generation(header, 0);
- ext4_extent_header_set_magic(header, EXT4_EXTENT_MAGIC);
-
- uint16_t max_entries = (EXT4_INODE_BLOCKS * sizeof(uint32_t) -
- sizeof(struct ext4_extent_header)) /
- sizeof(struct ext4_extent);
-
- ext4_extent_header_set_max_entries_count(header, max_entries);
- inode_ref->dirty = true;
-}
-
+void ext4_extent_tree_init(struct ext4_inode_ref *inode_ref);
-/**TODO: */
int ext4_extent_get_blocks(struct ext4_inode_ref *inode_ref, ext4_lblk_t iblock,
uint32_t max_blocks, ext4_fsblk_t *result, bool create,
uint32_t *blocks_count);
projects / lwext4.git / blobdiff