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123 lines
4.2 KiB
C
123 lines
4.2 KiB
C
#ifndef _EXT4_H
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#define _EXT4_H
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#include <linux/jbd.h>
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/* Temporarily we need this. */
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#include <linux/ext3_fs.h>
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typedef unsigned __int16 uint16_t;
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typedef unsigned __int32 uint32_t;
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typedef unsigned __int64 uint64_t;
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typedef uint32_t ext4_lblk_t;
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typedef uint64_t ext4_fsblk_t;
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/*
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* Flags used by ext4_map_blocks()
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*/
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/* Allocate any needed blocks and/or convert an unwritten
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extent to be an initialized ext4 */
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#define EXT4_GET_BLOCKS_CREATE 0x0001
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/* Request the creation of an unwritten extent */
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#define EXT4_GET_BLOCKS_UNWRIT_EXT 0x0002
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#define EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT (EXT4_GET_BLOCKS_UNWRIT_EXT|\
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EXT4_GET_BLOCKS_CREATE)
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/* Caller is from the delayed allocation writeout path
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* finally doing the actual allocation of delayed blocks */
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#define EXT4_GET_BLOCKS_DELALLOC_RESERVE 0x0004
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/* caller is from the direct IO path, request to creation of an
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unwritten extents if not allocated, split the unwritten
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extent if blocks has been preallocated already*/
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#define EXT4_GET_BLOCKS_PRE_IO 0x0008
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#define EXT4_GET_BLOCKS_CONVERT 0x0010
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#define EXT4_GET_BLOCKS_IO_CREATE_EXT (EXT4_GET_BLOCKS_PRE_IO|\
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EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT)
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/* Convert extent to initialized after IO complete */
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#define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\
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EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT)
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/* Eventual metadata allocation (due to growing extent tree)
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* should not fail, so try to use reserved blocks for that.*/
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#define EXT4_GET_BLOCKS_METADATA_NOFAIL 0x0020
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/* Don't normalize allocation size (used for fallocate) */
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#define EXT4_GET_BLOCKS_NO_NORMALIZE 0x0040
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/* Request will not result in inode size update (user for fallocate) */
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#define EXT4_GET_BLOCKS_KEEP_SIZE 0x0080
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/* Do not take i_data_sem locking in ext4_map_blocks */
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#define EXT4_GET_BLOCKS_NO_LOCK 0x0100
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/* Do not put hole in extent cache */
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#define EXT4_GET_BLOCKS_NO_PUT_HOLE 0x0200
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/* Convert written extents to unwritten */
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#define EXT4_GET_BLOCKS_CONVERT_UNWRITTEN 0x0400
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/*
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* The bit position of these flags must not overlap with any of the
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* EXT4_GET_BLOCKS_*. They are used by ext4_find_extent(),
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* read_extent_tree_block(), ext4_split_extent_at(),
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* ext4_ext_insert_extent(), and ext4_ext_create_new_leaf().
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* EXT4_EX_NOCACHE is used to indicate that the we shouldn't be
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* caching the extents when reading from the extent tree while a
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* truncate or punch hole operation is in progress.
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*/
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#define EXT4_EX_NOCACHE 0x40000000
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#define EXT4_EX_FORCE_CACHE 0x20000000
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/*
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* Flags used by ext4_free_blocks
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*/
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#define EXT4_FREE_BLOCKS_METADATA 0x0001
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#define EXT4_FREE_BLOCKS_FORGET 0x0002
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#define EXT4_FREE_BLOCKS_VALIDATED 0x0004
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#define EXT4_FREE_BLOCKS_NO_QUOT_UPDATE 0x0008
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#define EXT4_FREE_BLOCKS_NOFREE_FIRST_CLUSTER 0x0010
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#define EXT4_FREE_BLOCKS_NOFREE_LAST_CLUSTER 0x0020
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/*
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* Flags used in mballoc's allocation_context flags field.
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*
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* Also used to show what's going on for debugging purposes when the
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* flag field is exported via the traceport interface
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*/
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/* prefer goal again. length */
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#define EXT4_MB_HINT_MERGE 0x0001
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/* blocks already reserved */
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#define EXT4_MB_HINT_RESERVED 0x0002
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/* metadata is being allocated */
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#define EXT4_MB_HINT_METADATA 0x0004
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/* first blocks in the file */
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#define EXT4_MB_HINT_FIRST 0x0008
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/* search for the best chunk */
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#define EXT4_MB_HINT_BEST 0x0010
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/* data is being allocated */
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#define EXT4_MB_HINT_DATA 0x0020
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/* don't preallocate (for tails) */
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#define EXT4_MB_HINT_NOPREALLOC 0x0040
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/* allocate for locality group */
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#define EXT4_MB_HINT_GROUP_ALLOC 0x0080
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/* allocate goal blocks or none */
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#define EXT4_MB_HINT_GOAL_ONLY 0x0100
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/* goal is meaningful */
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#define EXT4_MB_HINT_TRY_GOAL 0x0200
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/* blocks already pre-reserved by delayed allocation */
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#define EXT4_MB_DELALLOC_RESERVED 0x0400
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/* We are doing stream allocation */
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#define EXT4_MB_STREAM_ALLOC 0x0800
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/* Use reserved root blocks if needed */
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#define EXT4_MB_USE_ROOT_BLOCKS 0x1000
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/* Use blocks from reserved pool */
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#define EXT4_MB_USE_RESERVED 0x2000
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#define ext4_sb_info ext3_sb_info
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static inline struct ext4_sb_info * EXT4_SB(struct super_block *sb)
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{
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return sb->s_fs_info;
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}
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#define EXT4_I(i) (i)
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#include <linux/ext4_jbd2.h>
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#include <linux/ext4_ext.h>
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#endif /* _EXT4_H */
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