qnx6.h 3.3 KB

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  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. #ifdef pr_fmt
  14. #undef pr_fmt
  15. #endif
  16. #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  17. #include <linux/fs.h>
  18. #include <linux/pagemap.h>
  19. typedef __u16 __bitwise __fs16;
  20. typedef __u32 __bitwise __fs32;
  21. typedef __u64 __bitwise __fs64;
  22. #include <linux/qnx6_fs.h>
  23. struct qnx6_sb_info {
  24. struct buffer_head *sb_buf; /* superblock buffer */
  25. struct qnx6_super_block *sb; /* our superblock */
  26. int s_blks_off; /* blkoffset fs-startpoint */
  27. int s_ptrbits; /* indirect pointer bitfield */
  28. unsigned long s_mount_opt; /* all mount options */
  29. int s_bytesex; /* holds endianess info */
  30. struct inode * inodes;
  31. struct inode * longfile;
  32. };
  33. struct qnx6_inode_info {
  34. __fs32 di_block_ptr[QNX6_NO_DIRECT_POINTERS];
  35. __u8 di_filelevels;
  36. __u32 i_dir_start_lookup;
  37. struct inode vfs_inode;
  38. };
  39. extern struct inode *qnx6_iget(struct super_block *sb, unsigned ino);
  40. extern struct dentry *qnx6_lookup(struct inode *dir, struct dentry *dentry,
  41. unsigned int flags);
  42. #ifdef CONFIG_QNX6FS_DEBUG
  43. extern void qnx6_superblock_debug(struct qnx6_super_block *,
  44. struct super_block *);
  45. #endif
  46. extern const struct inode_operations qnx6_dir_inode_operations;
  47. extern const struct file_operations qnx6_dir_operations;
  48. static inline struct qnx6_sb_info *QNX6_SB(struct super_block *sb)
  49. {
  50. return sb->s_fs_info;
  51. }
  52. static inline struct qnx6_inode_info *QNX6_I(struct inode *inode)
  53. {
  54. return container_of(inode, struct qnx6_inode_info, vfs_inode);
  55. }
  56. #define clear_opt(o, opt) (o &= ~(QNX6_MOUNT_##opt))
  57. #define set_opt(o, opt) (o |= (QNX6_MOUNT_##opt))
  58. #define test_opt(sb, opt) (QNX6_SB(sb)->s_mount_opt & \
  59. QNX6_MOUNT_##opt)
  60. enum {
  61. BYTESEX_LE,
  62. BYTESEX_BE,
  63. };
  64. static inline __u64 fs64_to_cpu(struct qnx6_sb_info *sbi, __fs64 n)
  65. {
  66. if (sbi->s_bytesex == BYTESEX_LE)
  67. return le64_to_cpu((__force __le64)n);
  68. else
  69. return be64_to_cpu((__force __be64)n);
  70. }
  71. static inline __fs64 cpu_to_fs64(struct qnx6_sb_info *sbi, __u64 n)
  72. {
  73. if (sbi->s_bytesex == BYTESEX_LE)
  74. return (__force __fs64)cpu_to_le64(n);
  75. else
  76. return (__force __fs64)cpu_to_be64(n);
  77. }
  78. static inline __u32 fs32_to_cpu(struct qnx6_sb_info *sbi, __fs32 n)
  79. {
  80. if (sbi->s_bytesex == BYTESEX_LE)
  81. return le32_to_cpu((__force __le32)n);
  82. else
  83. return be32_to_cpu((__force __be32)n);
  84. }
  85. static inline __fs32 cpu_to_fs32(struct qnx6_sb_info *sbi, __u32 n)
  86. {
  87. if (sbi->s_bytesex == BYTESEX_LE)
  88. return (__force __fs32)cpu_to_le32(n);
  89. else
  90. return (__force __fs32)cpu_to_be32(n);
  91. }
  92. static inline __u16 fs16_to_cpu(struct qnx6_sb_info *sbi, __fs16 n)
  93. {
  94. if (sbi->s_bytesex == BYTESEX_LE)
  95. return le16_to_cpu((__force __le16)n);
  96. else
  97. return be16_to_cpu((__force __be16)n);
  98. }
  99. static inline __fs16 cpu_to_fs16(struct qnx6_sb_info *sbi, __u16 n)
  100. {
  101. if (sbi->s_bytesex == BYTESEX_LE)
  102. return (__force __fs16)cpu_to_le16(n);
  103. else
  104. return (__force __fs16)cpu_to_be16(n);
  105. }
  106. extern struct qnx6_super_block *qnx6_mmi_fill_super(struct super_block *s,
  107. int silent);
  108. static inline void qnx6_put_page(struct page *page)
  109. {
  110. kunmap(page);
  111. put_page(page);
  112. }
  113. extern unsigned qnx6_find_entry(int len, struct inode *dir, const char *name,
  114. struct page **res_page);