LXR linux/include/linux/qnx4

   1/*
   2 *  Name                         : qnx4_fs.h
   3 *  Author                       : Richard Frowijn
   4 *  Function                     : qnx4 global filesystem definitions
   5 *  Version                      : 1.0.2
   6 *  Last modified                : 2000-01-31
   7 *
   8 *  History                      : 23-03-1998 created
   9 */
  10#ifndef _LINUX_QNX4_FS_H
  11#define _LINUX_QNX4_FS_H
  12
  13#include <linux/qnxtypes.h>
  14#include <linux/magic.h>
  15
  16#define QNX4_ROOT_INO 1
  17
  18#define QNX4_MAX_XTNTS_PER_XBLK 60
  19/* for di_status */
  20#define QNX4_FILE_USED          0x01
  21#define QNX4_FILE_MODIFIED      0x02
  22#define QNX4_FILE_BUSY          0x04
  23#define QNX4_FILE_LINK          0x08
  24#define QNX4_FILE_INODE         0x10
  25#define QNX4_FILE_FSYSCLEAN     0x20
  26
  27#define QNX4_I_MAP_SLOTS        8
  28#define QNX4_Z_MAP_SLOTS        64
  29#define QNX4_VALID_FS           0x0001  /* Clean fs. */
  30#define QNX4_ERROR_FS           0x0002  /* fs has errors. */
  31#define QNX4_BLOCK_SIZE         0x200   /* blocksize of 512 bytes */
  32#define QNX4_BLOCK_SIZE_BITS    9       /* blocksize shift */
  33#define QNX4_DIR_ENTRY_SIZE     0x040   /* dir entry size of 64 bytes */
  34#define QNX4_DIR_ENTRY_SIZE_BITS 6      /* dir entry size shift */
  35#define QNX4_XBLK_ENTRY_SIZE    0x200   /* xblk entry size */
  36#define QNX4_INODES_PER_BLOCK   0x08    /* 512 / 64 */
  37
  38/* for filenames */
  39#define QNX4_SHORT_NAME_MAX     16
  40#define QNX4_NAME_MAX           48
  41
  42/*
  43 * This is the original qnx4 inode layout on disk.
  44 */
  45struct qnx4_inode_entry {
  46        char            di_fname[QNX4_SHORT_NAME_MAX];
  47        qnx4_off_t      di_size;
  48        qnx4_xtnt_t     di_first_xtnt;
  49        __le32          di_xblk;
  50        __le32          di_ftime;
  51        __le32          di_mtime;
  52        __le32          di_atime;
  53        __le32          di_ctime;
  54        qnx4_nxtnt_t    di_num_xtnts;
  55        qnx4_mode_t     di_mode;
  56        qnx4_muid_t     di_uid;
  57        qnx4_mgid_t     di_gid;
  58        qnx4_nlink_t    di_nlink;
  59        __u8            di_zero[4];
  60        qnx4_ftype_t    di_type;
  61        __u8            di_status;
  62};
  63
  64struct qnx4_link_info {
  65        char            dl_fname[QNX4_NAME_MAX];
  66        __le32          dl_inode_blk;
  67        __u8            dl_inode_ndx;
  68        __u8            dl_spare[10];
  69        __u8            dl_status;
  70};
  71
  72struct qnx4_xblk {
  73        __le32          xblk_next_xblk;
  74        __le32          xblk_prev_xblk;
  75        __u8            xblk_num_xtnts;
  76        __u8            xblk_spare[3];
  77        __le32          xblk_num_blocks;
  78        qnx4_xtnt_t     xblk_xtnts[QNX4_MAX_XTNTS_PER_XBLK];
  79        char            xblk_signature[8];
  80        qnx4_xtnt_t     xblk_first_xtnt;
  81};
  82
  83struct qnx4_super_block {
  84        struct qnx4_inode_entry RootDir;
  85        struct qnx4_inode_entry Inode;
  86        struct qnx4_inode_entry Boot;
  87        struct qnx4_inode_entry AltBoot;
  88};
  89
  90#ifdef __KERNEL__
  91
  92#define QNX4_DEBUG 0
  93
  94#if QNX4_DEBUG
  95#define QNX4DEBUG(X) printk X
  96#else
  97#define QNX4DEBUG(X) (void) 0
  98#endif
  99
 100struct qnx4_sb_info {
 101        struct buffer_head      *sb_buf;        /* superblock buffer */
 102        struct qnx4_super_block *sb;            /* our superblock */
 103        unsigned int            Version;        /* may be useful */
 104        struct qnx4_inode_entry *BitMap;        /* useful */
 105};
 106
 107struct qnx4_inode_info {
 108        struct qnx4_inode_entry raw;
 109        loff_t mmu_private;
 110        struct inode vfs_inode;
 111};
 112
 113extern struct inode *qnx4_iget(struct super_block *, unsigned long);
 114extern struct dentry *qnx4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd);
 115extern unsigned long qnx4_count_free_blocks(struct super_block *sb);
 116extern unsigned long qnx4_block_map(struct inode *inode, long iblock);
 117
 118extern struct buffer_head *qnx4_bread(struct inode *, int, int);
 119
 120extern const struct inode_operations qnx4_file_inode_operations;
 121extern const struct inode_operations qnx4_dir_inode_operations;
 122extern const struct file_operations qnx4_file_operations;
 123extern const struct file_operations qnx4_dir_operations;
 124extern int qnx4_is_free(struct super_block *sb, long block);
 125extern int qnx4_set_bitmap(struct super_block *sb, long block, int busy);
 126extern int qnx4_create(struct inode *inode, struct dentry *dentry, int mode, struct nameidata *nd);
 127extern void qnx4_truncate(struct inode *inode);
 128extern void qnx4_free_inode(struct inode *inode);
 129extern int qnx4_unlink(struct inode *dir, struct dentry *dentry);
 130extern int qnx4_rmdir(struct inode *dir, struct dentry *dentry);
 131extern int qnx4_sync_file(struct file *file, struct dentry *dentry, int);
 132extern int qnx4_sync_inode(struct inode *inode);
 133
 134static inline struct qnx4_sb_info *qnx4_sb(struct super_block *sb)
 135{
 136        return sb->s_fs_info;
 137}
 138
 139static inline struct qnx4_inode_info *qnx4_i(struct inode *inode)
 140{
 141        return container_of(inode, struct qnx4_inode_info, vfs_inode);
 142}
 143
 144static inline struct qnx4_inode_entry *qnx4_raw_inode(struct inode *inode)
 145{
 146        return &qnx4_i(inode)->raw;
 147}
 148
 149#endif                          /* __KERNEL__ */
 150
 151#endif
 152