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gerrit-public.fairphone.software / kernel / msm-4.9 / 2fe8f00c497624f8e88dcb212ae227bd06ee6bb7 / . / fs / qnx6 / qnx6.h
blob: b00fcc960d374f28154b3efa9c7d9f8a4e5e7c88 [file] [log] [blame]
Kai Bankett5d026c72012-02-17 05:59:20 +0100[diff] [blame]1/*
2 * QNX6 file system, Linux implementation.
3 *
4 * Version : 1.0.0
5 *
6 * History :
7 *
8 * 01-02-2012 by Kai Bankett (chaosman@ontika.net) : first release.
9 * 16-02-2012 page map extension by Al Viro
10 *
11 */
12
13#include <linux/fs.h>
14#include <linux/pagemap.h>
15
16typedef __u16 __bitwise __fs16;
17typedef __u32 __bitwise __fs32;
18typedef __u64 __bitwise __fs64;
19
20#include <linux/qnx6_fs.h>
21
22#ifdef CONFIG_QNX6FS_DEBUG
23#define QNX6DEBUG(X) printk X
24#else
25#define QNX6DEBUG(X) (void) 0
26#endif
27
28struct qnx6_sb_info {
29 struct buffer_head *sb_buf; /* superblock buffer */
30 struct qnx6_super_block *sb; /* our superblock */
31 int s_blks_off; /* blkoffset fs-startpoint */
32 int s_ptrbits; /* indirect pointer bitfield */
33 unsigned long s_mount_opt; /* all mount options */
34 int s_bytesex; /* holds endianess info */
35 struct inode * inodes;
36 struct inode * longfile;
37};
38
39struct qnx6_inode_info {
40 __fs32 di_block_ptr[QNX6_NO_DIRECT_POINTERS];
41 __u8 di_filelevels;
42 __u32 i_dir_start_lookup;
43 struct inode vfs_inode;
44};
45
46extern struct inode *qnx6_iget(struct super_block *sb, unsigned ino);
47extern struct dentry *qnx6_lookup(struct inode *dir, struct dentry *dentry,
Al Viro00cd8dd2012-06-10 17:13:09 -0400[diff] [blame]48 unsigned int flags);
Kai Bankett5d026c72012-02-17 05:59:20 +0100[diff] [blame]49
50#ifdef CONFIG_QNX6FS_DEBUG
51extern void qnx6_superblock_debug(struct qnx6_super_block *,
52 struct super_block *);
53#endif
54
55extern const struct inode_operations qnx6_dir_inode_operations;
56extern const struct file_operations qnx6_dir_operations;
57
58static inline struct qnx6_sb_info *QNX6_SB(struct super_block *sb)
59{
60 return sb->s_fs_info;
61}
62
63static inline struct qnx6_inode_info *QNX6_I(struct inode *inode)
64{
65 return container_of(inode, struct qnx6_inode_info, vfs_inode);
66}
67
68#define clear_opt(o, opt) (o &= ~(QNX6_MOUNT_##opt))
69#define set_opt(o, opt) (o |= (QNX6_MOUNT_##opt))
70#define test_opt(sb, opt) (QNX6_SB(sb)->s_mount_opt & \
71 QNX6_MOUNT_##opt)
72enum {
73 BYTESEX_LE,
74 BYTESEX_BE,
75};
76
77static inline __u64 fs64_to_cpu(struct qnx6_sb_info *sbi, __fs64 n)
78{
79 if (sbi->s_bytesex == BYTESEX_LE)
80 return le64_to_cpu((__force __le64)n);
81 else
82 return be64_to_cpu((__force __be64)n);
83}
84
85static inline __fs64 cpu_to_fs64(struct qnx6_sb_info *sbi, __u64 n)
86{
87 if (sbi->s_bytesex == BYTESEX_LE)
88 return (__force __fs64)cpu_to_le64(n);
89 else
90 return (__force __fs64)cpu_to_be64(n);
91}
92
93static inline __u32 fs32_to_cpu(struct qnx6_sb_info *sbi, __fs32 n)
94{
95 if (sbi->s_bytesex == BYTESEX_LE)
96 return le32_to_cpu((__force __le32)n);
97 else
98 return be32_to_cpu((__force __be32)n);
99}
100
101static inline __fs32 cpu_to_fs32(struct qnx6_sb_info *sbi, __u32 n)
102{
103 if (sbi->s_bytesex == BYTESEX_LE)
104 return (__force __fs32)cpu_to_le32(n);
105 else
106 return (__force __fs32)cpu_to_be32(n);
107}
108
109static inline __u16 fs16_to_cpu(struct qnx6_sb_info *sbi, __fs16 n)
110{
111 if (sbi->s_bytesex == BYTESEX_LE)
112 return le16_to_cpu((__force __le16)n);
113 else
114 return be16_to_cpu((__force __be16)n);
115}
116
117static inline __fs16 cpu_to_fs16(struct qnx6_sb_info *sbi, __u16 n)
118{
119 if (sbi->s_bytesex == BYTESEX_LE)
120 return (__force __fs16)cpu_to_le16(n);
121 else
122 return (__force __fs16)cpu_to_be16(n);
123}
124
125extern struct qnx6_super_block *qnx6_mmi_fill_super(struct super_block *s,
126 int silent);
127
128static inline void qnx6_put_page(struct page *page)
129{
130 kunmap(page);
131 page_cache_release(page);
132}
133
134extern unsigned qnx6_find_entry(int len, struct inode *dir, const char *name,
135 struct page **res_page);