[deliverable/linux.git] / fs / qnx6 / qnx6.h

/*
 * QNX6 file system, Linux implementation.
 *
 * Version : 1.0.0
 *
 * History :
 *
 * 01-02-2012 by Kai Bankett (chaosman@ontika.net) : first release.
 * 16-02-2012 page map extension by Al Viro
 *
 */

#include <linux/fs.h>
#include <linux/pagemap.h>

typedef __u16 __bitwise __fs16;
typedef __u32 __bitwise __fs32;
typedef __u64 __bitwise __fs64;

#include <linux/qnx6_fs.h>

#ifdef CONFIG_QNX6FS_DEBUG
#define QNX6DEBUG(X) printk X
#else
#define QNX6DEBUG(X) (void) 0
#endif

struct qnx6_sb_info {
	struct buffer_head	*sb_buf;	/* superblock buffer */
	struct qnx6_super_block	*sb;		/* our superblock */
	int			s_blks_off;	/* blkoffset fs-startpoint */
	int			s_ptrbits;	/* indirect pointer bitfield */
	unsigned long		s_mount_opt;	/* all mount options */
	int			s_bytesex;	/* holds endianess info */
	struct inode *		inodes;
	struct inode *		longfile;
};

struct qnx6_inode_info {
	__fs32			di_block_ptr[QNX6_NO_DIRECT_POINTERS];
	__u8			di_filelevels;
	__u32			i_dir_start_lookup;
	struct inode		vfs_inode;
};

extern struct inode *qnx6_iget(struct super_block *sb, unsigned ino);
extern struct dentry *qnx6_lookup(struct inode *dir, struct dentry *dentry,
					unsigned int flags);

#ifdef CONFIG_QNX6FS_DEBUG
extern void qnx6_superblock_debug(struct qnx6_super_block *,
						struct super_block *);
#endif

extern const struct inode_operations qnx6_dir_inode_operations;
extern const struct file_operations qnx6_dir_operations;

static inline struct qnx6_sb_info *QNX6_SB(struct super_block *sb)
{
	return sb->s_fs_info;
}

static inline struct qnx6_inode_info *QNX6_I(struct inode *inode)
{
	return container_of(inode, struct qnx6_inode_info, vfs_inode);
}

#define clear_opt(o, opt)		(o &= ~(QNX6_MOUNT_##opt))
#define set_opt(o, opt)			(o |= (QNX6_MOUNT_##opt))
#define test_opt(sb, opt)		(QNX6_SB(sb)->s_mount_opt & \
					 QNX6_MOUNT_##opt)
enum {
	BYTESEX_LE,
	BYTESEX_BE,
};

static inline __u64 fs64_to_cpu(struct qnx6_sb_info *sbi, __fs64 n)
{
	if (sbi->s_bytesex == BYTESEX_LE)
		return le64_to_cpu((__force __le64)n);
	else
		return be64_to_cpu((__force __be64)n);
}

static inline __fs64 cpu_to_fs64(struct qnx6_sb_info *sbi, __u64 n)
{
	if (sbi->s_bytesex == BYTESEX_LE)
		return (__force __fs64)cpu_to_le64(n);
	else
		return (__force __fs64)cpu_to_be64(n);
}

static inline __u32 fs32_to_cpu(struct qnx6_sb_info *sbi, __fs32 n)
{
	if (sbi->s_bytesex == BYTESEX_LE)
		return le32_to_cpu((__force __le32)n);
	else
		return be32_to_cpu((__force __be32)n);
}

static inline __fs32 cpu_to_fs32(struct qnx6_sb_info *sbi, __u32 n)
{
	if (sbi->s_bytesex == BYTESEX_LE)
		return (__force __fs32)cpu_to_le32(n);
	else
		return (__force __fs32)cpu_to_be32(n);
}

static inline __u16 fs16_to_cpu(struct qnx6_sb_info *sbi, __fs16 n)
{
	if (sbi->s_bytesex == BYTESEX_LE)
		return le16_to_cpu((__force __le16)n);
	else
		return be16_to_cpu((__force __be16)n);
}

static inline __fs16 cpu_to_fs16(struct qnx6_sb_info *sbi, __u16 n)
{
	if (sbi->s_bytesex == BYTESEX_LE)
		return (__force __fs16)cpu_to_le16(n);
	else
		return (__force __fs16)cpu_to_be16(n);
}

extern struct qnx6_super_block *qnx6_mmi_fill_super(struct super_block *s,
						    int silent);

static inline void qnx6_put_page(struct page *page)
{
	kunmap(page);
	page_cache_release(page);
}

extern unsigned qnx6_find_entry(int len, struct inode *dir, const char *name,
				struct page **res_page);
Commit	Line	Data
5d026c72 KB	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
	16	typedef __u16 __bitwise __fs16;
	17	typedef __u32 __bitwise __fs32;
	18	typedef __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
	28	struct 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
	39	struct 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
	46	extern struct inode qnx6_iget(struct super_block sb, unsigned ino);
	47	extern struct dentry qnx6_lookup(struct inode dir, struct dentry *dentry,
00cd8dd3	48	unsigned int flags);
5d026c72 KB	49
	50	#ifdef CONFIG_QNX6FS_DEBUG
	51	extern void qnx6_superblock_debug(struct qnx6_super_block *,
	52	struct super_block *);
	53	#endif
	54
	55	extern const struct inode_operations qnx6_dir_inode_operations;
	56	extern const struct file_operations qnx6_dir_operations;
	57
	58	static inline struct qnx6_sb_info QNX6_SB(struct super_block sb)
	59	{
	60	return sb->s_fs_info;
	61	}
	62
	63	static 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)
	72	enum {
	73	BYTESEX_LE,
	74	BYTESEX_BE,
	75	};
	76
	77	static 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
	85	static 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
	93	static 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
	101	static 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
	109	static 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
117	static 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
125	extern struct qnx6_super_block qnx6_mmi_fill_super(struct super_block s,
126	int silent);
127
128	static inline void qnx6_put_page(struct page *page)
129	{
130	kunmap(page);
131	page_cache_release(page);
132	}
133
134	extern unsigned qnx6_find_entry(int len, struct inode dir, const char name,
135	struct page **res_page);