root/include/linux/qnx4_fs.h

INCLUDED FROM

DEFINITIONS

1. qnx4_raw_inode

/*
 *  Name                         : qnx4_fs.h
 *  Author                       : Richard Frowijn
 *  Function                     : qnx4 global filesystem definitions
 *  Version                      : 1.0.2
 *  Last modified                : 2000-01-31
 *
 *  History                      : 23-03-1998 created
 */
#ifndef _LINUX_QNX4_FS_H
#define _LINUX_QNX4_FS_H

#include <linux/qnxtypes.h>
#include <linux/magic.h>

#define QNX4_ROOT_INO 1

#define QNX4_MAX_XTNTS_PER_XBLK 60
/* for di_status */
#define QNX4_FILE_USED          0x01
#define QNX4_FILE_MODIFIED      0x02
#define QNX4_FILE_BUSY          0x04
#define QNX4_FILE_LINK          0x08
#define QNX4_FILE_INODE         0x10
#define QNX4_FILE_FSYSCLEAN     0x20

#define QNX4_I_MAP_SLOTS        8
#define QNX4_Z_MAP_SLOTS        64
#define QNX4_VALID_FS           0x0001  /* Clean fs. */
#define QNX4_ERROR_FS           0x0002  /* fs has errors. */
#define QNX4_BLOCK_SIZE         0x200   /* blocksize of 512 bytes */
#define QNX4_BLOCK_SIZE_BITS    9       /* blocksize shift */
#define QNX4_DIR_ENTRY_SIZE     0x040   /* dir entry size of 64 bytes */
#define QNX4_DIR_ENTRY_SIZE_BITS 6      /* dir entry size shift */
#define QNX4_XBLK_ENTRY_SIZE    0x200   /* xblk entry size */
#define QNX4_INODES_PER_BLOCK   0x08    /* 512 / 64 */

/* for filenames */
#define QNX4_SHORT_NAME_MAX     16
#define QNX4_NAME_MAX           48

/*
 * This is the original qnx4 inode layout on disk.
 */
struct qnx4_inode_entry {
        char            di_fname[QNX4_SHORT_NAME_MAX];
        qnx4_off_t      di_size;
        qnx4_xtnt_t     di_first_xtnt;
        __le32          di_xblk;
        __le32          di_ftime;
        __le32          di_mtime;
        __le32          di_atime;
        __le32          di_ctime;
        qnx4_nxtnt_t    di_num_xtnts;
        qnx4_mode_t     di_mode;
        qnx4_muid_t     di_uid;
        qnx4_mgid_t     di_gid;
        qnx4_nlink_t    di_nlink;
        __u8            di_zero[4];
        qnx4_ftype_t    di_type;
        __u8            di_status;
};

struct qnx4_link_info {
        char            dl_fname[QNX4_NAME_MAX];
        __le32          dl_inode_blk;
        __u8            dl_inode_ndx;
        __u8            dl_spare[10];
        __u8            dl_status;
};

struct qnx4_xblk {
        __le32          xblk_next_xblk;
        __le32          xblk_prev_xblk;
        __u8            xblk_num_xtnts;
        __u8            xblk_spare[3];
        __le32          xblk_num_blocks;
        qnx4_xtnt_t     xblk_xtnts[QNX4_MAX_XTNTS_PER_XBLK];
        char            xblk_signature[8];
        qnx4_xtnt_t     xblk_first_xtnt;
};

struct qnx4_super_block {
        struct qnx4_inode_entry RootDir;
        struct qnx4_inode_entry Inode;
        struct qnx4_inode_entry Boot;
        struct qnx4_inode_entry AltBoot;
};

#ifdef __KERNEL__

#define QNX4_DEBUG 0

#if QNX4_DEBUG
#define QNX4DEBUG(X) printk X
#else
#define QNX4DEBUG(X) (void) 0
#endif

struct qnx4_sb_info {
        struct buffer_head      *sb_buf;        /* superblock buffer */
        struct qnx4_super_block *sb;            /* our superblock */
        unsigned int            Version;        /* may be useful */
        struct qnx4_inode_entry *BitMap;        /* useful */
};

struct qnx4_inode_info {
        struct qnx4_inode_entry raw;
        loff_t mmu_private;
        struct inode vfs_inode;
};

extern struct inode *qnx4_iget(struct super_block *, unsigned long);
extern struct dentry *qnx4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd);
extern unsigned long qnx4_count_free_blocks(struct super_block *sb);
extern unsigned long qnx4_block_map(struct inode *inode, long iblock);

extern struct buffer_head *qnx4_bread(struct inode *, int, int);

extern const struct inode_operations qnx4_file_inode_operations;
extern const struct inode_operations qnx4_dir_inode_operations;
extern const struct file_operations qnx4_file_operations;
extern const struct file_operations qnx4_dir_operations;
extern int qnx4_is_free(struct super_block *sb, long block);
extern int qnx4_set_bitmap(struct super_block *sb, long block, int busy);
extern int qnx4_create(struct inode *inode, struct dentry *dentry, int mode, struct nameidata *nd);
extern void qnx4_truncate(struct inode *inode);
extern void qnx4_free_inode(struct inode *inode);
extern int qnx4_unlink(struct inode *dir, struct dentry *dentry);
extern int qnx4_rmdir(struct inode *dir, struct dentry *dentry);
extern int qnx4_sync_file(struct file *file, struct dentry *dentry, int);
extern int qnx4_sync_inode(struct inode *inode);

static inline struct qnx4_sb_info *qnx4_sb(struct super_block *sb)
{
        return sb->s_fs_info;
}

static inline struct qnx4_inode_info *qnx4_i(struct inode *inode)
{
        return container_of(inode, struct qnx4_inode_info, vfs_inode);
}

static inline struct qnx4_inode_entry *qnx4_raw_inode(struct inode *inode)
{
        return &qnx4_i(inode)->raw;
}

#endif                          /* __KERNEL__ */

#endif