[XFRM]: Extension for dynamic update of endpoint address(es)

Extend the XFRM framework so that endpoint address(es) in the XFRM
databases could be dynamically updated according to a request (MIGRATE
message) from user application. Target XFRM policy is first identified
by the selector in the MIGRATE message. Next, the endpoint addresses
of the matching templates and XFRM states are updated according to
the MIGRATE message.

Signed-off-by: Shinta Sugimoto <shinta.sugimoto@ericsson.com>
Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 19 insertions, 0 deletions

diff --git a/include/linux/xfrm.h b/include/linux/xfrm.h
index 9529ea1ae392..15ca89e9961b 100644
--- a/include/linux/xfrm.h
+++ b/include/linux/xfrm.h
@@ -178,6 +178,9 @@ enum {
         XFRM_MSG_REPORT,
 #define XFRM_MSG_REPORT XFRM_MSG_REPORT
 
+        XFRM_MSG_MIGRATE,
+#define XFRM_MSG_MIGRATE XFRM_MSG_MIGRATE
+
         __XFRM_MSG_MAX
 };
 #define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
@@ -256,6 +259,7 @@ enum xfrm_attr_type_t {
         XFRMA_COADDR,           /* xfrm_address_t */
         XFRMA_LASTUSED,
         XFRMA_POLICY_TYPE,      /* struct xfrm_userpolicy_type */
+        XFRMA_MIGRATE,
         __XFRMA_MAX
 
 #define XFRMA_MAX (__XFRMA_MAX - 1)
@@ -351,6 +355,19 @@ struct xfrm_user_report {
         struct xfrm_selector            sel;
 };
 
+struct xfrm_user_migrate {
+        xfrm_address_t                  old_daddr;
+        xfrm_address_t                  old_saddr;
+        xfrm_address_t                  new_daddr;
+        xfrm_address_t                  new_saddr;
+        __u8                            proto;
+        __u8                            mode;
+        __u16                           reserved;
+        __u32                           reqid;
+        __u16                           old_family;
+        __u16                           new_family;
+};
+
 #ifndef __KERNEL__
 /* backwards compatibility for userspace */
 #define XFRMGRP_ACQUIRE         1
@@ -375,6 +392,8 @@ enum xfrm_nlgroups {
 #define XFRMNLGRP_AEVENTS       XFRMNLGRP_AEVENTS
         XFRMNLGRP_REPORT,
 #define XFRMNLGRP_REPORT        XFRMNLGRP_REPORT
+        XFRMNLGRP_MIGRATE,
+#define XFRMNLGRP_MIGRATE       XFRMNLGRP_MIGRATE
         __XFRMNLGRP_MAX
 };
 #define XFRMNLGRP_MAX   (__XFRMNLGRP_MAX - 1)