mirror of
https://git.openwrt.org/project/make_ext4fs.git
synced 2024-11-23 23:50:44 -05:00
89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
|
/****************************************************************************
|
||
|
|
****************************************************************************
|
||
|
|
***
|
||
|
|
*** This header was automatically generated from a Linux kernel header
|
||
|
|
*** of the same name, to make information necessary for userspace to
|
||
|
|
*** call into the kernel available to libc. It contains only constants,
|
||
|
|
*** structures, and macros generated from the original header, and thus,
|
||
|
|
*** contains no copyrightable information.
|
||
|
|
***
|
||
|
|
****************************************************************************
|
||
|
|
****************************************************************************/
|
||
|
|
#ifndef _EXT4_EXTENTS
|
||
|
|
#define _EXT4_EXTENTS
|
||
|
|
|
||
|
|
#include "ext4.h"
|
||
|
|
|
||
|
|
#define AGGRESSIVE_TEST_
|
||
|
|
|
||
|
|
#define EXTENTS_STATS__
|
||
|
|
|
||
|
|
#define CHECK_BINSEARCH__
|
||
|
|
|
||
|
|
#define EXT_DEBUG__
|
||
|
|
#ifdef EXT_DEBUG
|
||
|
|
#define ext_debug(a...) printk(a)
|
||
|
|
#else
|
||
|
|
#define ext_debug(a...)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define EXT_STATS_
|
||
|
|
|
||
|
|
struct ext4_extent {
|
||
|
|
__le32 ee_block;
|
||
|
|
__le16 ee_len;
|
||
|
|
__le16 ee_start_hi;
|
||
|
|
__le32 ee_start_lo;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct ext4_extent_idx {
|
||
|
|
__le32 ei_block;
|
||
|
|
__le32 ei_leaf_lo;
|
||
|
|
__le16 ei_leaf_hi;
|
||
|
|
__u16 ei_unused;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct ext4_extent_header {
|
||
|
|
__le16 eh_magic;
|
||
|
|
__le16 eh_entries;
|
||
|
|
__le16 eh_max;
|
||
|
|
__le16 eh_depth;
|
||
|
|
__le32 eh_generation;
|
||
|
|
};
|
||
|
|
|
||
|
|
#define EXT4_EXT_MAGIC 0xf30a
|
||
|
|
|
||
|
|
struct ext4_ext_path {
|
||
|
|
ext4_fsblk_t p_block;
|
||
|
|
__u16 p_depth;
|
||
|
|
struct ext4_extent *p_ext;
|
||
|
|
struct ext4_extent_idx *p_idx;
|
||
|
|
struct ext4_extent_header *p_hdr;
|
||
|
|
struct buffer_head *p_bh;
|
||
|
|
};
|
||
|
|
|
||
|
|
#define EXT4_EXT_CACHE_NO 0
|
||
|
|
#define EXT4_EXT_CACHE_GAP 1
|
||
|
|
#define EXT4_EXT_CACHE_EXTENT 2
|
||
|
|
|
||
|
|
#define EXT_CONTINUE 0
|
||
|
|
#define EXT_BREAK 1
|
||
|
|
#define EXT_REPEAT 2
|
||
|
|
|
||
|
|
#define EXT_MAX_BLOCK 0xffffffff
|
||
|
|
|
||
|
|
#define EXT_INIT_MAX_LEN (1UL << 15)
|
||
|
|
#define EXT_UNINIT_MAX_LEN (EXT_INIT_MAX_LEN - 1)
|
||
|
|
|
||
|
|
#define EXT_FIRST_EXTENT(__hdr__) ((struct ext4_extent *) (((char *) (__hdr__)) + sizeof(struct ext4_extent_header)))
|
||
|
|
#define EXT_FIRST_INDEX(__hdr__) ((struct ext4_extent_idx *) (((char *) (__hdr__)) + sizeof(struct ext4_extent_header)))
|
||
|
|
#define EXT_HAS_FREE_INDEX(__path__) (le16_to_cpu((__path__)->p_hdr->eh_entries) < le16_to_cpu((__path__)->p_hdr->eh_max))
|
||
|
|
#define EXT_LAST_EXTENT(__hdr__) (EXT_FIRST_EXTENT((__hdr__)) + le16_to_cpu((__hdr__)->eh_entries) - 1)
|
||
|
|
#define EXT_LAST_INDEX(__hdr__) (EXT_FIRST_INDEX((__hdr__)) + le16_to_cpu((__hdr__)->eh_entries) - 1)
|
||
|
|
#define EXT_MAX_EXTENT(__hdr__) (EXT_FIRST_EXTENT((__hdr__)) + le16_to_cpu((__hdr__)->eh_max) - 1)
|
||
|
|
#define EXT_MAX_INDEX(__hdr__) (EXT_FIRST_INDEX((__hdr__)) + le16_to_cpu((__hdr__)->eh_max) - 1)
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|