jbd2: fix use after free in jbd2_journal_dirty_metadata()
[linux-2.6.git] / fs / befs / endian.h
1 /*
2  * linux/fs/befs/endian.h
3  *
4  * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com>
5  *
6  * Partially based on similar funtions in the sysv driver.
7  */
8
9 #ifndef LINUX_BEFS_ENDIAN
10 #define LINUX_BEFS_ENDIAN
11
12 #include <asm/byteorder.h>
13
14 static inline u64
15 fs64_to_cpu(const struct super_block *sb, fs64 n)
16 {
17         if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
18                 return le64_to_cpu((__force __le64)n);
19         else
20                 return be64_to_cpu((__force __be64)n);
21 }
22
23 static inline fs64
24 cpu_to_fs64(const struct super_block *sb, u64 n)
25 {
26         if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
27                 return (__force fs64)cpu_to_le64(n);
28         else
29                 return (__force fs64)cpu_to_be64(n);
30 }
31
32 static inline u32
33 fs32_to_cpu(const struct super_block *sb, fs32 n)
34 {
35         if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
36                 return le32_to_cpu((__force __le32)n);
37         else
38                 return be32_to_cpu((__force __be32)n);
39 }
40
41 static inline fs32
42 cpu_to_fs32(const struct super_block *sb, u32 n)
43 {
44         if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
45                 return (__force fs32)cpu_to_le32(n);
46         else
47                 return (__force fs32)cpu_to_be32(n);
48 }
49
50 static inline u16
51 fs16_to_cpu(const struct super_block *sb, fs16 n)
52 {
53         if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
54                 return le16_to_cpu((__force __le16)n);
55         else
56                 return be16_to_cpu((__force __be16)n);
57 }
58
59 static inline fs16
60 cpu_to_fs16(const struct super_block *sb, u16 n)
61 {
62         if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
63                 return (__force fs16)cpu_to_le16(n);
64         else
65                 return (__force fs16)cpu_to_be16(n);
66 }
67
68 /* Composite types below here */
69
70 static inline befs_block_run
71 fsrun_to_cpu(const struct super_block *sb, befs_disk_block_run n)
72 {
73         befs_block_run run;
74
75         if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) {
76                 run.allocation_group = le32_to_cpu((__force __le32)n.allocation_group);
77                 run.start = le16_to_cpu((__force __le16)n.start);
78                 run.len = le16_to_cpu((__force __le16)n.len);
79         } else {
80                 run.allocation_group = be32_to_cpu((__force __be32)n.allocation_group);
81                 run.start = be16_to_cpu((__force __be16)n.start);
82                 run.len = be16_to_cpu((__force __be16)n.len);
83         }
84         return run;
85 }
86
87 static inline befs_disk_block_run
88 cpu_to_fsrun(const struct super_block *sb, befs_block_run n)
89 {
90         befs_disk_block_run run;
91
92         if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) {
93                 run.allocation_group = cpu_to_le32(n.allocation_group);
94                 run.start = cpu_to_le16(n.start);
95                 run.len = cpu_to_le16(n.len);
96         } else {
97                 run.allocation_group = cpu_to_be32(n.allocation_group);
98                 run.start = cpu_to_be16(n.start);
99                 run.len = cpu_to_be16(n.len);
100         }
101         return run;
102 }
103
104 static inline befs_data_stream
105 fsds_to_cpu(const struct super_block *sb, const befs_disk_data_stream *n)
106 {
107         befs_data_stream data;
108         int i;
109
110         for (i = 0; i < BEFS_NUM_DIRECT_BLOCKS; ++i)
111                 data.direct[i] = fsrun_to_cpu(sb, n->direct[i]);
112
113         data.max_direct_range = fs64_to_cpu(sb, n->max_direct_range);
114         data.indirect = fsrun_to_cpu(sb, n->indirect);
115         data.max_indirect_range = fs64_to_cpu(sb, n->max_indirect_range);
116         data.double_indirect = fsrun_to_cpu(sb, n->double_indirect);
117         data.max_double_indirect_range = fs64_to_cpu(sb,
118                                                      n->
119                                                      max_double_indirect_range);
120         data.size = fs64_to_cpu(sb, n->size);
121
122         return data;
123 }
124
125 #endif                          //LINUX_BEFS_ENDIAN