LXR linux/fs/qnx6/qnx6.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * QNX6 file system, Linux implementation.
   4 *
   5 * Version : 1.0.0
   6 *
   7 * History :
   8 *
   9 * 01-02-2012 by Kai Bankett (chaosman@ontika.net) : first release.
  10 * 16-02-2012 page map extension by Al Viro
  11 *
  12 */
  13
  14#ifdef pr_fmt
  15#undef pr_fmt
  16#endif
  17
  18#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  19
  20#include <linux/fs.h>
  21#include <linux/pagemap.h>
  22
  23typedef __u16 __bitwise __fs16;
  24typedef __u32 __bitwise __fs32;
  25typedef __u64 __bitwise __fs64;
  26
  27#include <linux/qnx6_fs.h>
  28
  29struct qnx6_sb_info {
  30        struct buffer_head      *sb_buf;        /* superblock buffer */
  31        struct qnx6_super_block *sb;            /* our superblock */
  32        int                     s_blks_off;     /* blkoffset fs-startpoint */
  33        int                     s_ptrbits;      /* indirect pointer bitfield */
  34        unsigned long           s_mount_opt;    /* all mount options */
  35        int                     s_bytesex;      /* holds endianess info */
  36        struct inode *          inodes;
  37        struct inode *          longfile;
  38};
  39
  40struct qnx6_inode_info {
  41        __fs32                  di_block_ptr[QNX6_NO_DIRECT_POINTERS];
  42        __u8                    di_filelevels;
  43        __u32                   i_dir_start_lookup;
  44        struct inode            vfs_inode;
  45};
  46
  47extern struct inode *qnx6_iget(struct super_block *sb, unsigned ino);
  48extern struct dentry *qnx6_lookup(struct inode *dir, struct dentry *dentry,
  49                                        unsigned int flags);
  50
  51#ifdef CONFIG_QNX6FS_DEBUG
  52extern void qnx6_superblock_debug(struct qnx6_super_block *,
  53                                                struct super_block *);
  54#endif
  55
  56extern const struct inode_operations qnx6_dir_inode_operations;
  57extern const struct file_operations qnx6_dir_operations;
  58
  59static inline struct qnx6_sb_info *QNX6_SB(struct super_block *sb)
  60{
  61        return sb->s_fs_info;
  62}
  63
  64static inline struct qnx6_inode_info *QNX6_I(struct inode *inode)
  65{
  66        return container_of(inode, struct qnx6_inode_info, vfs_inode);
  67}
  68
  69#define clear_opt(o, opt)               (o &= ~(QNX6_MOUNT_##opt))
  70#define set_opt(o, opt)                 (o |= (QNX6_MOUNT_##opt))
  71#define test_opt(sb, opt)               (QNX6_SB(sb)->s_mount_opt & \
  72                                         QNX6_MOUNT_##opt)
  73enum {
  74        BYTESEX_LE,
  75        BYTESEX_BE,
  76};
  77
  78static inline __u64 fs64_to_cpu(struct qnx6_sb_info *sbi, __fs64 n)
  79{
  80        if (sbi->s_bytesex == BYTESEX_LE)
  81                return le64_to_cpu((__force __le64)n);
  82        else
  83                return be64_to_cpu((__force __be64)n);
  84}
  85
  86static inline __fs64 cpu_to_fs64(struct qnx6_sb_info *sbi, __u64 n)
  87{
  88        if (sbi->s_bytesex == BYTESEX_LE)
  89                return (__force __fs64)cpu_to_le64(n);
  90        else
  91                return (__force __fs64)cpu_to_be64(n);
  92}
  93
  94static inline __u32 fs32_to_cpu(struct qnx6_sb_info *sbi, __fs32 n)
  95{
  96        if (sbi->s_bytesex == BYTESEX_LE)
  97                return le32_to_cpu((__force __le32)n);
  98        else
  99                return be32_to_cpu((__force __be32)n);
 100}
 101
 102static inline __fs32 cpu_to_fs32(struct qnx6_sb_info *sbi, __u32 n)
 103{
 104        if (sbi->s_bytesex == BYTESEX_LE)
 105                return (__force __fs32)cpu_to_le32(n);
 106        else
 107                return (__force __fs32)cpu_to_be32(n);
 108}
 109
 110static inline __u16 fs16_to_cpu(struct qnx6_sb_info *sbi, __fs16 n)
 111{
 112        if (sbi->s_bytesex == BYTESEX_LE)
 113                return le16_to_cpu((__force __le16)n);
 114        else
 115                return be16_to_cpu((__force __be16)n);
 116}
 117
 118static inline __fs16 cpu_to_fs16(struct qnx6_sb_info *sbi, __u16 n)
 119{
 120        if (sbi->s_bytesex == BYTESEX_LE)
 121                return (__force __fs16)cpu_to_le16(n);
 122        else
 123                return (__force __fs16)cpu_to_be16(n);
 124}
 125
 126extern struct qnx6_super_block *qnx6_mmi_fill_super(struct super_block *s,
 127                                                    int silent);
 128
 129static inline void qnx6_put_page(struct page *page)
 130{
 131        kunmap(page);
 132        put_page(page);
 133}
 134
 135extern unsigned qnx6_find_entry(int len, struct inode *dir, const char *name,
 136                                struct page **res_page);
 137