include/linux/reiserfs_acl.h

   1 #include <linux/init.h>
   2 #include <linux/posix_acl.h>
   3 #include <linux/xattr_acl.h>
   4
   5 #define REISERFS_ACL_VERSION    0x0001
   6
   7 typedef struct {
   8         __u16           e_tag;
   9         __u16           e_perm;
  10         __u32           e_id;
  11 } reiserfs_acl_entry;
  12
  13 typedef struct {
  14         __u16           e_tag;
  15         __u16           e_perm;
  16 } reiserfs_acl_entry_short;
  17
  18 typedef struct {
  19         __u32           a_version;
  20 } reiserfs_acl_header;
  21
  22 static inline size_t reiserfs_acl_size(int count)
  23 {
  24         if (count <= 4) {
  25                 return sizeof(reiserfs_acl_header) +
  26                        count * sizeof(reiserfs_acl_entry_short);
  27         } else {
  28                 return sizeof(reiserfs_acl_header) +
  29                        4 * sizeof(reiserfs_acl_entry_short) +
  30                        (count - 4) * sizeof(reiserfs_acl_entry);
  31         }
  32 }
  33
  34 static inline int reiserfs_acl_count(size_t size)
  35 {
  36         ssize_t s;
  37         size -= sizeof(reiserfs_acl_header);
  38         s = size - 4 * sizeof(reiserfs_acl_entry_short);
  39         if (s < 0) {
  40                 if (size % sizeof(reiserfs_acl_entry_short))
  41                         return -1;
  42                 return size / sizeof(reiserfs_acl_entry_short);
  43         } else {
  44                 if (s % sizeof(reiserfs_acl_entry))
  45                         return -1;
  46                 return s / sizeof(reiserfs_acl_entry) + 4;
  47         }
  48 }
  49
  50
  51 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
  52 struct posix_acl * reiserfs_get_acl(struct inode *inode, int type);
  53 int reiserfs_acl_chmod (struct inode *inode);
  54 int reiserfs_inherit_default_acl (struct inode *dir, struct dentry *dentry, struct inode *inode);
  55 int reiserfs_cache_default_acl (struct inode *dir);
  56 extern int reiserfs_xattr_posix_acl_init (void) __init;
  57 extern int reiserfs_xattr_posix_acl_exit (void);
  58 extern struct reiserfs_xattr_handler posix_acl_default_handler;
  59 extern struct reiserfs_xattr_handler posix_acl_access_handler;
  60 #else
  61
  62 #define reiserfs_get_acl NULL
  63 #define reiserfs_cache_default_acl(inode) 0
  64
  65 static inline int
  66 reiserfs_xattr_posix_acl_init (void)
  67 {
  68     return 0;
  69 }
  70
  71 static inline int
  72 reiserfs_xattr_posix_acl_exit (void)
  73 {
  74     return 0;
  75 }
  76
  77 static inline int
  78 reiserfs_acl_chmod (struct inode *inode)
  79 {
  80     return 0;
  81 }
  82
  83 static inline int
  84 reiserfs_inherit_default_acl (const struct inode *dir, struct dentry *dentry, struct inode *inode)
  85 {
  86     return 0;
  87 }
  88
  89 #endif