reiserfs_acl.h 2.4 KB

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  1. #include <linux/init.h>
  2. #include <linux/posix_acl.h>
  3. #define REISERFS_ACL_VERSION 0x0001
  4. typedef struct {
  5. __le16 e_tag;
  6. __le16 e_perm;
  7. __le32 e_id;
  8. } reiserfs_acl_entry;
  9. typedef struct {
  10. __le16 e_tag;
  11. __le16 e_perm;
  12. } reiserfs_acl_entry_short;
  13. typedef struct {
  14. __le32 a_version;
  15. } reiserfs_acl_header;
  16. static inline size_t reiserfs_acl_size(int count)
  17. {
  18. if (count <= 4) {
  19. return sizeof(reiserfs_acl_header) +
  20. count * sizeof(reiserfs_acl_entry_short);
  21. } else {
  22. return sizeof(reiserfs_acl_header) +
  23. 4 * sizeof(reiserfs_acl_entry_short) +
  24. (count - 4) * sizeof(reiserfs_acl_entry);
  25. }
  26. }
  27. static inline int reiserfs_acl_count(size_t size)
  28. {
  29. ssize_t s;
  30. size -= sizeof(reiserfs_acl_header);
  31. s = size - 4 * sizeof(reiserfs_acl_entry_short);
  32. if (s < 0) {
  33. if (size % sizeof(reiserfs_acl_entry_short))
  34. return -1;
  35. return size / sizeof(reiserfs_acl_entry_short);
  36. } else {
  37. if (s % sizeof(reiserfs_acl_entry))
  38. return -1;
  39. return s / sizeof(reiserfs_acl_entry) + 4;
  40. }
  41. }
  42. #ifdef CONFIG_REISERFS_FS_POSIX_ACL
  43. struct posix_acl *reiserfs_get_acl(struct inode *inode, int type);
  44. int reiserfs_acl_chmod(struct inode *inode);
  45. int reiserfs_inherit_default_acl(struct inode *dir, struct dentry *dentry,
  46. struct inode *inode);
  47. int reiserfs_cache_default_acl(struct inode *dir);
  48. extern int reiserfs_xattr_posix_acl_init(void) __init;
  49. extern int reiserfs_xattr_posix_acl_exit(void);
  50. extern struct reiserfs_xattr_handler posix_acl_default_handler;
  51. extern struct reiserfs_xattr_handler posix_acl_access_handler;
  52. static inline void reiserfs_init_acl_access(struct inode *inode)
  53. {
  54. REISERFS_I(inode)->i_acl_access = NULL;
  55. }
  56. static inline void reiserfs_init_acl_default(struct inode *inode)
  57. {
  58. REISERFS_I(inode)->i_acl_default = NULL;
  59. }
  60. #else
  61. #define reiserfs_cache_default_acl(inode) 0
  62. static inline struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
  63. {
  64. return NULL;
  65. }
  66. static inline int reiserfs_xattr_posix_acl_init(void)
  67. {
  68. return 0;
  69. }
  70. static inline int reiserfs_xattr_posix_acl_exit(void)
  71. {
  72. return 0;
  73. }
  74. static inline int reiserfs_acl_chmod(struct inode *inode)
  75. {
  76. return 0;
  77. }
  78. static inline int
  79. reiserfs_inherit_default_acl(const struct inode *dir, struct dentry *dentry,
  80. struct inode *inode)
  81. {
  82. return 0;
  83. }
  84. static inline void reiserfs_init_acl_access(struct inode *inode)
  85. {
  86. }
  87. static inline void reiserfs_init_acl_default(struct inode *inode)
  88. {
  89. }
  90. #endif