xfrm: allow to avoid copying DSCP during encapsulation

[~andy/linux] / net / xfrm / xfrm_user.c

diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index fbd9e6cd0fd7a1297d99b48c37cc6de8ce938bbf..204cba192af8d70a2596b8888fe8bb0e9f4b3904 100644 (file)
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -515,6 +515,9 @@ static struct xfrm_state *xfrm_state_construct(struct net *net,
 
        copy_from_user_state(x, p);
 
+       if (attrs[XFRMA_SA_EXTRA_FLAGS])
+               x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
+
        if ((err = attach_aead(&x->aead, &x->props.ealgo,
                               attrs[XFRMA_ALG_AEAD])))
                goto error;
@@ -779,6 +782,13 @@ static int copy_to_user_state_extra(struct xfrm_state *x,
 
        copy_to_user_state(x, p);
 
+       if (x->props.extra_flags) {
+               ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
+                                 x->props.extra_flags);
+               if (ret)
+                       goto out;
+       }
+
        if (x->coaddr) {
                ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
                if (ret)
@@ -2302,6 +2312,7 @@ static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
        [XFRMA_MARK]            = { .len = sizeof(struct xfrm_mark) },
        [XFRMA_TFCPAD]          = { .type = NLA_U32 },
        [XFRMA_REPLAY_ESN_VAL]  = { .len = sizeof(struct xfrm_replay_state_esn) },
+       [XFRMA_SA_EXTRA_FLAGS]  = { .type = NLA_U32 },
 };
 
 static struct xfrm_link {
@@ -2495,6 +2506,8 @@ static inline size_t xfrm_sa_len(struct xfrm_state *x)
                                    x->security->ctx_len);
        if (x->coaddr)
                l += nla_total_size(sizeof(*x->coaddr));
+       if (x->props.extra_flags)
+               l += nla_total_size(sizeof(x->props.extra_flags));
 
        /* Must count x->lastused as it may become non-zero behind our back. */
        l += nla_total_size(sizeof(u64));