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#ifdef pr_fmt
14#undef pr_fmt
15#endif
16
17#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
19#include <linux/fs.h>
20#include <linux/pagemap.h>
21
22typedef __u16 __bitwise __fs16;
23typedef __u32 __bitwise __fs32;
24typedef __u64 __bitwise __fs64;
25
26#include <linux/qnx6_fs.h>
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,
48					unsigned int flags);
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);
136