2 files changed, 63 insertions, 0 deletions

diff --git a/include/linux/xfrm.h b/include/linux/xfrm.h
index 9529ea1ae3..15ca89e996 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)
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index bf91d63290..16924cb772 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -362,6 +362,19 @@ struct xfrm_policy
         struct xfrm_tmpl        xfrm_vec[XFRM_MAX_DEPTH];
 };
 
+struct xfrm_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;
+};
+
 #define XFRM_KM_TIMEOUT                30
 /* which seqno */
 #define XFRM_REPLAY_SEQ         1
@@ -388,6 +401,7 @@ struct xfrm_mgr
         int                     (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
         int                     (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c);
         int                     (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
+        int                     (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles);
 };
 
 extern int xfrm_register_km(struct xfrm_mgr *km);
@@ -988,6 +1002,16 @@ extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst,
                           struct flowi *fl, int family, int strict);
 extern void xfrm_init_pmtu(struct dst_entry *dst);
 
+#ifdef CONFIG_XFRM_MIGRATE
+extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
+                      struct xfrm_migrate *m, int num_bundles);
+extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m);
+extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
+                                              struct xfrm_migrate *m);
+extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
+                        struct xfrm_migrate *m, int num_bundles);
+#endif
+
 extern wait_queue_head_t km_waitq;
 extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
 extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid);
@@ -1053,5 +1077,25 @@ static inline void xfrm_aevent_doreplay(struct xfrm_state *x)
                 xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);
 }
 
+#ifdef CONFIG_XFRM_MIGRATE
+static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
+{
+        return (struct xfrm_algo *)kmemdup(orig, sizeof(*orig) + orig->alg_key_len, GFP_KERNEL);
+}
+
+static inline void xfrm_states_put(struct xfrm_state **states, int n)
+{
+        int i;
+        for (i = 0; i < n; i++)
+                xfrm_state_put(*(states + i));
+}
+
+static inline void xfrm_states_delete(struct xfrm_state **states, int n)
+{
+        int i;
+        for (i = 0; i < n; i++)
+                xfrm_state_delete(*(states + i));
+}
+#endif
 
 #endif  /* _NET_XFRM_H */