1 files changed, 50 insertions, 0 deletions

diff --git a/include/linux/xattr_acl.h b/include/linux/xattr_acl.h
new file mode 100644
index 000000000000..7a1f9b93a45f
--- /dev/null
+++ b/include/linux/xattr_acl.h
@@ -0,0 +1,50 @@
+/*
+  File: linux/xattr_acl.h
+
+  (extended attribute representation of access control lists)
+
+  (C) 2000 Andreas Gruenbacher, <a.gruenbacher@computer.org>
+*/
+
+#ifndef _LINUX_XATTR_ACL_H
+#define _LINUX_XATTR_ACL_H
+
+#include <linux/posix_acl.h>
+
+#define XATTR_NAME_ACL_ACCESS   "system.posix_acl_access"
+#define XATTR_NAME_ACL_DEFAULT  "system.posix_acl_default"
+
+#define XATTR_ACL_VERSION       0x0002
+
+typedef struct {
+        __u16           e_tag;
+        __u16           e_perm;
+        __u32           e_id;
+} xattr_acl_entry;
+
+typedef struct {
+        __u32           a_version;
+        xattr_acl_entry a_entries[0];
+} xattr_acl_header;
+
+static inline size_t xattr_acl_size(int count)
+{
+        return sizeof(xattr_acl_header) + count * sizeof(xattr_acl_entry);
+}
+
+static inline int xattr_acl_count(size_t size)
+{
+        if (size < sizeof(xattr_acl_header))
+                return -1;
+        size -= sizeof(xattr_acl_header);
+        if (size % sizeof(xattr_acl_entry))
+                return -1;
+        return size / sizeof(xattr_acl_entry);
+}
+
+struct posix_acl * posix_acl_from_xattr(const void *value, size_t size);
+int posix_acl_to_xattr(const struct posix_acl *acl, void *buffer, size_t size);
+
+
+
+#endif /* _LINUX_XATTR_ACL_H */