linux/fs/reiserfs/acl.h
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   1#include <linux/init.h>
   2#include <linux/posix_acl.h>
   3
   4#define REISERFS_ACL_VERSION    0x0001
   5
   6typedef struct {
   7        __le16 e_tag;
   8        __le16 e_perm;
   9        __le32 e_id;
  10} reiserfs_acl_entry;
  11
  12typedef struct {
  13        __le16 e_tag;
  14        __le16 e_perm;
  15} reiserfs_acl_entry_short;
  16
  17typedef struct {
  18        __le32 a_version;
  19} reiserfs_acl_header;
  20
  21static 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
  33static 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
  50struct posix_acl *reiserfs_get_acl(struct inode *inode, int type);
  51int reiserfs_acl_chmod(struct inode *inode);
  52int reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
  53                                 struct inode *dir, struct dentry *dentry,
  54                                 struct inode *inode);
  55int reiserfs_cache_default_acl(struct inode *dir);
  56extern const struct xattr_handler reiserfs_posix_acl_default_handler;
  57extern 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
  64static inline int reiserfs_acl_chmod(struct inode *inode)
  65{
  66        return 0;
  67}
  68
  69static inline int
  70reiserfs_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
  77
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