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-rw-r--r--include/uapi/linux/if_tun.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/uapi/linux/if_tun.h b/include/uapi/linux/if_tun.h
index 2835b85fd46..82334f88967 100644
--- a/include/uapi/linux/if_tun.h
+++ b/include/uapi/linux/if_tun.h
@@ -68,6 +68,8 @@
#define IFF_MULTI_QUEUE 0x0100
#define IFF_ATTACH_QUEUE 0x0200
#define IFF_DETACH_QUEUE 0x0400
+/* read-only flag */
+#define IFF_PERSIST 0x0800
/* Features for GSO (TUNSETOFFLOAD). */
#define TUN_F_CSUM 0x01 /* You can hand me unchecksummed packets. */