[net-next,04/10] xfrm_policy: bypass flow_cache_lookup

Submitted by Florian Westphal on July 17, 2017, 11:57 a.m.

Details

Message ID 20170717115727.26042-5-fw@strlen.de
State Accepted
Delegated to: David Miller
Headers show

Commit Message

Florian Westphal July 17, 2017, 11:57 a.m.
Instead of consulting flow cache, call the xfrm bundle/policy lookup
functions directly.  This pretends the flow cache had no entry.

This helps to gradually remove flow cache integration,
followup commit will remove the dead code that this change adds.

Signed-off-by: Florian Westphal <fw@strlen.de>
---
 net/xfrm/xfrm_policy.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

Patch hide | download patch | download mbox

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index ff61d8557929..1c7126ab752c 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -2052,13 +2052,12 @@  static struct xfrm_dst *xfrm_create_dummy_bundle(struct net *net,
 }
 
 static struct flow_cache_object *
-xfrm_bundle_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir,
-		   struct flow_cache_object *oldflo, void *ctx)
+xfrm_bundle_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir, struct xfrm_flo *xflo)
 {
-	struct xfrm_flo *xflo = (struct xfrm_flo *)ctx;
 	struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
 	struct xfrm_dst *xdst, *new_xdst;
 	int num_pols = 0, num_xfrms = 0, i, err, pol_dead;
+	struct flow_cache_object *oldflo = NULL;
 
 	/* Check if the policies from old bundle are usable */
 	xdst = NULL;
@@ -2128,8 +2127,6 @@  xfrm_bundle_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir,
 		dst_release_immediate(&xdst->u.dst);
 	}
 
-	/* We do need to return one reference for original caller */
-	dst_hold(&new_xdst->u.dst);
 	return &new_xdst->flo;
 
 make_dummy_bundle:
@@ -2242,8 +2239,7 @@  struct dst_entry *xfrm_lookup(struct net *net, struct dst_entry *dst_orig,
 		    !net->xfrm.policy_count[XFRM_POLICY_OUT])
 			goto nopol;
 
-		flo = flow_cache_lookup(net, fl, family, dir,
-					xfrm_bundle_lookup, &xflo);
+		flo = xfrm_bundle_lookup(net, fl, family, dir, &xflo);
 		if (flo == NULL)
 			goto nopol;
 		if (IS_ERR(flo)) {
@@ -2489,8 +2485,8 @@  int __xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb,
 	if (!pol) {
 		struct flow_cache_object *flo;
 
-		flo = flow_cache_lookup(net, &fl, family, fl_dir,
-					xfrm_policy_lookup, NULL);
+		flo = xfrm_policy_lookup(net, &fl, family, dir, NULL, NULL);
+
 		if (IS_ERR_OR_NULL(flo))
 			pol = ERR_CAST(flo);
 		else