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 reiserfs_transaction_handle *th,
  53                                  struct inode *dir, struct dentry *dentry,
  54                                  struct inode *inode);
  55 int reiserfs_cache_default_acl(struct inode *dir);
  56 extern const struct xattr_handler reiserfs_posix_acl_default_handler;
  57 extern const struct xattr_handler reiserfs_posix_acl_access_handler;
  58
  59 #else
  60
  61 #define reiserfs_cache_default_acl(inode) 0
  62 #define reiserfs_get_acl NULL
  63
  64 static inline int reiserfs_acl_chmod(struct inode *inode)
  65 {
  66         return 0;
  67 }
  68
  69 static inline int
  70 reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
  71                              const struct inode *dir, struct dentry *dentry,
  72                              struct inode *inode)
  73 {
  74         return 0;
  75 }
  76 #endif