shm: add sealing API

[pandora-kernel.git] / include / linux / fcntl.h

diff --git a/include/linux/fcntl.h b/include/linux/fcntl.h
index f550f89..a558f45 100644 (file)
--- a/include/linux/fcntl.h
+++ b/include/linux/fcntl.h
@@ -27,6 +27,21 @@
 #define F_SETPIPE_SZ   (F_LINUX_SPECIFIC_BASE + 7)
 #define F_GETPIPE_SZ   (F_LINUX_SPECIFIC_BASE + 8)
 
+/*
+ * Set/Get seals
+ */
+#define F_ADD_SEALS    (F_LINUX_SPECIFIC_BASE + 9)
+#define F_GET_SEALS    (F_LINUX_SPECIFIC_BASE + 10)
+
+/*
+ * Types of seals
+ */
+#define F_SEAL_SEAL    0x0001  /* prevent further seals from being set */
+#define F_SEAL_SHRINK  0x0002  /* prevent file from shrinking */
+#define F_SEAL_GROW    0x0004  /* prevent file from growing */
+#define F_SEAL_WRITE   0x0008  /* prevent writes */
+/* (1U << 31) is reserved for signed error codes */
+
 /*
  * Types of directory notifications that may be requested.
  */