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diff --git a/src/ceph/src/client/posix_acl.h b/src/ceph/src/client/posix_acl.h
new file mode 100644
index 0000000..4afcc3f
--- /dev/null
+++ b/src/ceph/src/client/posix_acl.h
@@ -0,0 +1,35 @@
+#ifndef CEPH_POSIX_ACL
+#define CEPH_POSIX_ACL
+
+#define ACL_EA_VERSION          0x0002
+
+#define ACL_USER_OBJ            0x01
+#define ACL_USER                0x02
+#define ACL_GROUP_OBJ           0x04
+#define ACL_GROUP               0x08
+#define ACL_MASK                0x10
+#define ACL_OTHER               0x20
+
+#define ACL_EA_ACCESS  "system.posix_acl_access"
+#define ACL_EA_DEFAULT "system.posix_acl_default"
+
+typedef struct {
+  ceph_le16       e_tag;
+  ceph_le16       e_perm;
+  ceph_le32       e_id;
+} acl_ea_entry;
+
+typedef struct {
+  ceph_le32       a_version;
+  acl_ea_entry    a_entries[0];
+} acl_ea_header;
+
+class UserPerm;
+
+int posix_acl_check(const void *xattr, size_t size);
+int posix_acl_equiv_mode(const void *xattr, size_t size, mode_t *mode_p);
+int posix_acl_inherit_mode(bufferptr& acl, mode_t *mode_p);
+int posix_acl_access_chmod(bufferptr& acl, mode_t mode);
+int posix_acl_permits(const bufferptr& acl, uid_t i_uid, gid_t i_gid,
+		      const UserPerm& groups, unsigned want);
+#endif