linux/fs/qnx6/qnx6.h
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   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
  16typedef __u16 __bitwise __fs16;
  17typedef __u32 __bitwise __fs32;
  18typedef __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
  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
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