[XFRM]: Add XFRM_MODE_xxx for future use.

Transformation mode is used as either IPsec transport or tunnel.
It is required to add two more items, route optimization and inbound trigger
for Mobile IPv6.
Based on MIPL2 kernel patch.

This patch was also written by: Ville Nuorvala <vnuorval@tcs.hut.fi>

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>

2 files changed, 8 insertions, 7 deletions

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 32c963c90573..a0d58971391d 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -779,7 +779,7 @@ xfrm_tmpl_resolve(struct xfrm_policy *policy, struct flowi *fl,
                 xfrm_address_t *local  = saddr;
                 struct xfrm_tmpl *tmpl = &policy->xfrm_vec[i];
 
-                if (tmpl->mode) {
+                if (tmpl->mode == XFRM_MODE_TUNNEL) {
                         remote = &tmpl->id.daddr;
                         local = &tmpl->saddr;
                 }
@@ -1005,7 +1005,8 @@ xfrm_state_ok(struct xfrm_tmpl *tmpl, struct xfrm_state *x,
                 (x->props.reqid == tmpl->reqid || !tmpl->reqid) &&
                 x->props.mode == tmpl->mode &&
                 (tmpl->aalgos & (1<<x->props.aalgo)) &&
-                !(x->props.mode && xfrm_state_addr_cmp(tmpl, x, family));
+                !(x->props.mode != XFRM_MODE_TRANSPORT &&
+                  xfrm_state_addr_cmp(tmpl, x, family));
 }
 
 static inline int
@@ -1015,14 +1016,14 @@ xfrm_policy_ok(struct xfrm_tmpl *tmpl, struct sec_path *sp, int start,
         int idx = start;
 
         if (tmpl->optional) {
-                if (!tmpl->mode)
+                if (tmpl->mode == XFRM_MODE_TRANSPORT)
                         return start;
         } else
                 start = -1;
         for (; idx < sp->len; idx++) {
                 if (xfrm_state_ok(tmpl, sp->xvec[idx], family))
                         return ++idx;
-                if (sp->xvec[idx]->props.mode)
+                if (sp->xvec[idx]->props.mode != XFRM_MODE_TRANSPORT)
                         break;
         }
         return start;
@@ -1047,7 +1048,7 @@ EXPORT_SYMBOL(xfrm_decode_session);
 static inline int secpath_has_tunnel(struct sec_path *sp, int k)
 {
         for (; k < sp->len; k++) {
-                if (sp->xvec[k]->props.mode)
+                if (sp->xvec[k]->props.mode != XFRM_MODE_TRANSPORT)
                         return 1;
         }
 
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index f70e158874d2..0d580ac19771 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -174,8 +174,8 @@ static int verify_newsa_info(struct xfrm_usersa_info *p,
 
         err = -EINVAL;
         switch (p->mode) {
-        case 0:
-        case 1:
+        case XFRM_MODE_TRANSPORT:
+        case XFRM_MODE_TUNNEL:
                 break;
 
         default: