• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /****************************************************************************
2  ****************************************************************************
3  ***
4  ***   This header was automatically generated from a Linux kernel header
5  ***   of the same name, to make information necessary for userspace to
6  ***   call into the kernel available to libc.  It contains only constants,
7  ***   structures, and macros generated from the original header, and thus,
8  ***   contains no copyrightable information.
9  ***
10  ****************************************************************************
11  ****************************************************************************/
12 #ifndef _EXT4_EXTENTS
13 #define _EXT4_EXTENTS
14 
15 #include "ext4_utils/ext4.h"
16 
17 #define AGGRESSIVE_TEST_
18 
19 #define EXTENTS_STATS__
20 
21 #define CHECK_BINSEARCH__
22 
23 #define EXT_DEBUG__
24 #ifdef EXT_DEBUG
25 #define ext_debug(a...) printk(a)
26 #else
27 #define ext_debug(a...)
28 #endif
29 
30 #define EXT_STATS_
31 
32 struct ext4_extent {
33  __le32 ee_block;
34  __le16 ee_len;
35  __le16 ee_start_hi;
36  __le32 ee_start_lo;
37 };
38 
39 struct ext4_extent_idx {
40  __le32 ei_block;
41  __le32 ei_leaf_lo;
42  __le16 ei_leaf_hi;
43  __u16 ei_unused;
44 };
45 
46 struct ext4_extent_header {
47  __le16 eh_magic;
48  __le16 eh_entries;
49  __le16 eh_max;
50  __le16 eh_depth;
51  __le32 eh_generation;
52 };
53 
54 #define EXT4_EXT_MAGIC 0xf30a
55 
56 struct ext4_ext_path {
57  ext4_fsblk_t p_block;
58  __u16 p_depth;
59  struct ext4_extent *p_ext;
60  struct ext4_extent_idx *p_idx;
61  struct ext4_extent_header *p_hdr;
62  struct buffer_head *p_bh;
63 };
64 
65 #define EXT4_EXT_CACHE_NO 0
66 #define EXT4_EXT_CACHE_GAP 1
67 #define EXT4_EXT_CACHE_EXTENT 2
68 
69 #define EXT_CONTINUE 0
70 #define EXT_BREAK 1
71 #define EXT_REPEAT 2
72 
73 #define EXT_MAX_BLOCK 0xffffffff
74 
75 #define EXT_INIT_MAX_LEN (1UL << 15)
76 #define EXT_UNINIT_MAX_LEN (EXT_INIT_MAX_LEN - 1)
77 
78 #define EXT_FIRST_EXTENT(__hdr__)   ((struct ext4_extent *) (((char *) (__hdr__)) +   sizeof(struct ext4_extent_header)))
79 #define EXT_FIRST_INDEX(__hdr__)   ((struct ext4_extent_idx *) (((char *) (__hdr__)) +   sizeof(struct ext4_extent_header)))
80 #define EXT_HAS_FREE_INDEX(__path__)   (le16_to_cpu((__path__)->p_hdr->eh_entries)   < le16_to_cpu((__path__)->p_hdr->eh_max))
81 #define EXT_LAST_EXTENT(__hdr__)   (EXT_FIRST_EXTENT((__hdr__)) + le16_to_cpu((__hdr__)->eh_entries) - 1)
82 #define EXT_LAST_INDEX(__hdr__)   (EXT_FIRST_INDEX((__hdr__)) + le16_to_cpu((__hdr__)->eh_entries) - 1)
83 #define EXT_MAX_EXTENT(__hdr__)   (EXT_FIRST_EXTENT((__hdr__)) + le16_to_cpu((__hdr__)->eh_max) - 1)
84 #define EXT_MAX_INDEX(__hdr__)   (EXT_FIRST_INDEX((__hdr__)) + le16_to_cpu((__hdr__)->eh_max) - 1)
85 
86 #endif
87 
88 
89