include/linux/qnx4_fs.h

   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  */
  45 struct 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
  64 struct 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
  72 struct 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
  83 struct 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
 100 struct 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
 107 struct qnx4_inode_info {
 108         struct qnx4_inode_entry raw;
 109         loff_t mmu_private;
 110         struct inode vfs_inode;
 111 };
 112
 113 extern struct dentry *qnx4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd);
 114 extern unsigned long qnx4_count_free_blocks(struct super_block *sb);
 115 extern unsigned long qnx4_block_map(struct inode *inode, long iblock);
 116
 117 extern struct buffer_head *qnx4_bread(struct inode *, int, int);
 118
 119 extern struct inode_operations qnx4_file_inode_operations;
 120 extern struct inode_operations qnx4_dir_inode_operations;
 121 extern const struct file_operations qnx4_file_operations;
 122 extern const struct file_operations qnx4_dir_operations;
 123 extern int qnx4_is_free(struct super_block *sb, long block);
 124 extern int qnx4_set_bitmap(struct super_block *sb, long block, int busy);
 125 extern int qnx4_create(struct inode *inode, struct dentry *dentry, int mode, struct nameidata *nd);
 126 extern void qnx4_truncate(struct inode *inode);
 127 extern void qnx4_free_inode(struct inode *inode);
 128 extern int qnx4_unlink(struct inode *dir, struct dentry *dentry);
 129 extern int qnx4_rmdir(struct inode *dir, struct dentry *dentry);
 130 extern int qnx4_sync_file(struct file *file, struct dentry *dentry, int);
 131 extern int qnx4_sync_inode(struct inode *inode);
 132
 133 static inline struct qnx4_sb_info *qnx4_sb(struct super_block *sb)
 134 {
 135         return sb->s_fs_info;
 136 }
 137
 138 static inline struct qnx4_inode_info *qnx4_i(struct inode *inode)
 139 {
 140         return container_of(inode, struct qnx4_inode_info, vfs_inode);
 141 }
 142
 143 static inline struct qnx4_inode_entry *qnx4_raw_inode(struct inode *inode)
 144 {
 145         return &qnx4_i(inode)->raw;
 146 }
 147
 148 #endif                          /* __KERNEL__ */
 149
 150 #endif