include/linux/reiserfs_acl.h

   1 #include <linux/init.h>
   2 #include <linux/posix_acl.h>
   3
   4 #define REISERFS_ACL_VERSION    0x0001
   5
   6 typedef struct {
   7         __le16 e_tag;
   8         __le16 e_perm;
   9         __le32 e_id;
  10 } reiserfs_acl_entry;
  11
  12 typedef struct {
  13         __le16 e_tag;
  14         __le16 e_perm;
  15 } reiserfs_acl_entry_short;
  16
  17 typedef struct {
  18         __le32 a_version;
  19 } reiserfs_acl_header;
  20
  21 static inline size_t reiserfs_acl_size(int count)
  22 {
  23         if (count <= 4) {
  24                 return sizeof(reiserfs_acl_header) +
  25                     count * sizeof(reiserfs_acl_entry_short);
  26         } else {
  27                 return sizeof(reiserfs_acl_header) +
  28                     4 * sizeof(reiserfs_acl_entry_short) +
  29                     (count - 4) * sizeof(reiserfs_acl_entry);
  30         }
  31 }
  32
  33 static inline int reiserfs_acl_count(size_t size)
  34 {
  35         ssize_t s;
  36         size -= sizeof(reiserfs_acl_header);
  37         s = size - 4 * sizeof(reiserfs_acl_entry_short);
  38         if (s < 0) {
  39                 if (size % sizeof(reiserfs_acl_entry_short))
  40                         return -1;
  41                 return size / sizeof(reiserfs_acl_entry_short);
  42         } else {
  43                 if (s % sizeof(reiserfs_acl_entry))
  44                         return -1;
  45                 return s / sizeof(reiserfs_acl_entry) + 4;
  46         }
  47 }
  48
  49 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
  50 struct posix_acl *reiserfs_get_acl(struct inode *inode, int type);
  51 int reiserfs_acl_chmod(struct inode *inode);
  52 int reiserfs_inherit_default_acl(struct inode *dir, struct dentry *dentry,
  53                                  struct inode *inode);
  54 int reiserfs_cache_default_acl(struct inode *dir);
  55 extern int reiserfs_xattr_posix_acl_init(void) __init;
  56 extern int reiserfs_xattr_posix_acl_exit(void);
  57 extern struct reiserfs_xattr_handler posix_acl_default_handler;
  58 extern struct reiserfs_xattr_handler posix_acl_access_handler;
  59
  60 static inline void reiserfs_init_acl_access(struct inode *inode)
  61 {
  62         REISERFS_I(inode)->i_acl_access = NULL;
  63 }
  64
  65 static inline void reiserfs_init_acl_default(struct inode *inode)
  66 {
  67         REISERFS_I(inode)->i_acl_default = NULL;
  68 }
  69 #else
  70
  71 #define reiserfs_cache_default_acl(inode) 0
  72
  73 static inline struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
  74 {
  75         return NULL;
  76 }
  77
  78 static inline int reiserfs_xattr_posix_acl_init(void)
  79 {
  80         return 0;
  81 }
  82
  83 static inline int reiserfs_xattr_posix_acl_exit(void)
  84 {
  85         return 0;
  86 }
  87
  88 static inline int reiserfs_acl_chmod(struct inode *inode)
  89 {
  90         return 0;
  91 }
  92
  93 static inline int
  94 reiserfs_inherit_default_acl(const struct inode *dir, struct dentry *dentry,
  95                              struct inode *inode)
  96 {
  97         return 0;
  98 }
  99
 100 static inline void reiserfs_init_acl_access(struct inode *inode)
 101 {
 102 }
 103
 104 static inline void reiserfs_init_acl_default(struct inode *inode)
 105 {
 106 }
 107 #endif