From b6ca8bd5a9198c70c48297390723e4e56bd6e879 Mon Sep 17 00:00:00 2001 From: David Miller Date: Tue, 28 Nov 2017 15:45:44 -0500 Subject: xfrm: Move child route linkage into xfrm_dst. XFRM bundle child chains look like this: xdst1 --> xdst2 --> xdst3 --> path_dst All of xdstN are xfrm_dst objects and xdst->u.dst.xfrm is non-NULL. The final child pointer in the chain, here called 'path_dst', is some other kind of route such as an ipv4 or ipv6 one. The xfrm output path pops routes, one at a time, via the child pointer, until we hit one which has a dst->xfrm pointer which is NULL. We can easily preserve the above mechanisms with child sitting only in the xfrm_dst structure. All children in the chain before we break out of the xfrm_output() loop have dst->xfrm non-NULL and are therefore xfrm_dst objects. Since we break out of the loop when we find dst->xfrm NULL, we will not try to dereference 'dst' as if it were an xfrm_dst. Signed-off-by: David S. Miller --- net/core/dst.c | 9 ++++++--- net/core/pktgen.c | 12 ++++++------ 2 files changed, 12 insertions(+), 9 deletions(-) (limited to 'net/core') diff --git a/net/core/dst.c b/net/core/dst.c index 6a3c21b8fc8d..5cf96179e8e0 100644 --- a/net/core/dst.c +++ b/net/core/dst.c @@ -21,6 +21,7 @@ #include #include #include +#include #include #include @@ -62,7 +63,6 @@ void dst_init(struct dst_entry *dst, struct dst_ops *ops, struct net_device *dev, int initial_ref, int initial_obsolete, unsigned short flags) { - dst->child = NULL; dst->dev = dev; if (dev) dev_hold(dev); @@ -121,8 +121,11 @@ struct dst_entry *dst_destroy(struct dst_entry * dst) smp_rmb(); #ifdef CONFIG_XFRM - if (dst->xfrm) - child = dst->child; + if (dst->xfrm) { + struct xfrm_dst *xdst = (struct xfrm_dst *) dst; + + child = xdst->child; + } #endif if (!(dst->flags & DST_NOCOUNT)) dst_entries_add(dst->ops, -1); diff --git a/net/core/pktgen.c b/net/core/pktgen.c index f95a15086225..b9ce241cd28c 100644 --- a/net/core/pktgen.c +++ b/net/core/pktgen.c @@ -399,7 +399,7 @@ struct pktgen_dev { __u8 ipsmode; /* IPSEC mode (config) */ __u8 ipsproto; /* IPSEC type (config) */ __u32 spi; - struct dst_entry dst; + struct xfrm_dst xdst; struct dst_ops dstops; #endif char result[512]; @@ -2609,7 +2609,7 @@ static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) * supports both transport/tunnel mode + ESP/AH type. */ if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0)) - skb->_skb_refdst = (unsigned long)&pkt_dev->dst | SKB_DST_NOREF; + skb->_skb_refdst = (unsigned long)&pkt_dev->xdst.u.dst | SKB_DST_NOREF; rcu_read_lock_bh(); err = x->outer_mode->output(x, skb); @@ -3742,10 +3742,10 @@ static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) * performance under such circumstance. */ pkt_dev->dstops.family = AF_INET; - pkt_dev->dst.dev = pkt_dev->odev; - dst_init_metrics(&pkt_dev->dst, pktgen_dst_metrics, false); - pkt_dev->dst.child = &pkt_dev->dst; - pkt_dev->dst.ops = &pkt_dev->dstops; + pkt_dev->xdst.u.dst.dev = pkt_dev->odev; + dst_init_metrics(&pkt_dev->xdst.u.dst, pktgen_dst_metrics, false); + pkt_dev->xdst.child = &pkt_dev->xdst.u.dst; + pkt_dev->xdst.u.dst.ops = &pkt_dev->dstops; #endif return add_dev_to_thread(t, pkt_dev); -- cgit v1.2.3