From c9500d7b7de8ff6ac88ee3e38b782889f1616593 Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Fri, 29 Mar 2019 21:16:32 +0100 Subject: xfrm: store xfrm_mode directly, not its address This structure is now only 4 bytes, so its more efficient to cache a copy rather than its address. No significant size difference in allmodconfig vmlinux. With non-modular kernel that has all XFRM options enabled, this series reduces vmlinux image size by ~11kb. All xfrm_mode indirections are gone and all modes are built-in. before (ipsec-next master): text data bss dec filename 21071494 7233140 11104324 39408958 vmlinux.master after this series: 21066448 7226772 11104324 39397544 vmlinux.patched With allmodconfig kernel, the size increase is only 362 bytes, even all the xfrm config options removed in this series are modular. before: text data bss dec filename 15731286 6936912 4046908 26715106 vmlinux.master after this series: 15731492 6937068 4046908 26715468 vmlinux Signed-off-by: Florian Westphal Reviewed-by: Sabrina Dubroca Signed-off-by: Steffen Klassert --- net/xfrm/xfrm_input.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) (limited to 'net/xfrm/xfrm_input.c') diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c index b5a31c8e2088..314973aaa414 100644 --- a/net/xfrm/xfrm_input.c +++ b/net/xfrm/xfrm_input.c @@ -351,12 +351,12 @@ xfrm_inner_mode_encap_remove(struct xfrm_state *x, static int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb) { - const struct xfrm_mode *inner_mode = x->inner_mode; + const struct xfrm_mode *inner_mode = &x->inner_mode; const struct xfrm_state_afinfo *afinfo; int err = -EAFNOSUPPORT; rcu_read_lock(); - afinfo = xfrm_state_afinfo_get_rcu(x->outer_mode->family); + afinfo = xfrm_state_afinfo_get_rcu(x->outer_mode.family); if (likely(afinfo)) err = afinfo->extract_input(x, skb); @@ -482,7 +482,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type) goto drop; } - family = x->outer_mode->family; + family = x->outer_mode.family; /* An encap_type of -1 indicates async resumption. */ if (encap_type == -1) { @@ -666,7 +666,7 @@ resume: XFRM_MODE_SKB_CB(skb)->protocol = nexthdr; - inner_mode = x->inner_mode; + inner_mode = &x->inner_mode; if (x->sel.family == AF_UNSPEC) { inner_mode = xfrm_ip2inner_mode(x, XFRM_MODE_SKB_CB(skb)->protocol); @@ -681,7 +681,7 @@ resume: goto drop; } - if (x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL) { + if (x->outer_mode.flags & XFRM_MODE_FLAG_TUNNEL) { decaps = 1; break; } @@ -691,7 +691,7 @@ resume: * transport mode so the outer address is identical. */ daddr = &x->id.daddr; - family = x->outer_mode->family; + family = x->outer_mode.family; err = xfrm_parse_spi(skb, nexthdr, &spi, &seq); if (err < 0) { @@ -721,7 +721,7 @@ resume: err = -EAFNOSUPPORT; rcu_read_lock(); - afinfo = xfrm_state_afinfo_get_rcu(x->inner_mode->family); + afinfo = xfrm_state_afinfo_get_rcu(x->inner_mode.family); if (likely(afinfo)) err = afinfo->transport_finish(skb, xfrm_gro || async); rcu_read_unlock(); -- cgit v1.2.3-58-ga151