GitHub-Mirror/linux-bl808
2
0
Fork 0
mirror of https://github.com/Fishwaldo/linux-bl808.git synced 2025-06-17 20:25:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

xfrm: store xfrm_mode directly, not its address

Browse source 
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 <fw@strlen.de>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Florian Westphal 2019-03-29 21:16:32 +01:00 • committed by Steffen Klassert
parent 4c145dce26
commit c9500d7b7d
13 changed files with 55 additions and 55 deletions
Download patch file Download diff file Expand all files Collapse all files

20
net/xfrm/xfrm_output.c
View file

@ -334,7 +334,7 @@ static int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb)
IPCB(skb)->flags |= IPSKB_XFRM_TUNNEL_SIZE;
skb->protocol = htons(ETH_P_IP);
switch (x->outer_mode->encap) {
switch (x->outer_mode.encap) {
case XFRM_MODE_BEET:
return xfrm4_beet_encap_add(x, skb);
case XFRM_MODE_TUNNEL:
@ -357,7 +357,7 @@ static int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb)
skb->ignore_df = 1;
skb->protocol = htons(ETH_P_IPV6);
switch (x->outer_mode->encap) {
switch (x->outer_mode.encap) {
case XFRM_MODE_BEET:
return xfrm6_beet_encap_add(x, skb);
case XFRM_MODE_TUNNEL:
@ -373,22 +373,22 @@ static int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb)
static int xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb)
{
switch (x->outer_mode->encap) {
switch (x->outer_mode.encap) {
case XFRM_MODE_BEET:
case XFRM_MODE_TUNNEL:
if (x->outer_mode->family == AF_INET)
if (x->outer_mode.family == AF_INET)
return xfrm4_prepare_output(x, skb);
if (x->outer_mode->family == AF_INET6)
if (x->outer_mode.family == AF_INET6)
return xfrm6_prepare_output(x, skb);
break;
case XFRM_MODE_TRANSPORT:
if (x->outer_mode->family == AF_INET)
if (x->outer_mode.family == AF_INET)
return xfrm4_transport_output(x, skb);
if (x->outer_mode->family == AF_INET6)
if (x->outer_mode.family == AF_INET6)
return xfrm6_transport_output(x, skb);
break;
case XFRM_MODE_ROUTEOPTIMIZATION:
if (x->outer_mode->family == AF_INET6)
if (x->outer_mode.family == AF_INET6)
return xfrm6_ro_output(x, skb);
WARN_ON_ONCE(1);
break;
@ -489,7 +489,7 @@ resume:
}
skb_dst_set(skb, dst);
x = dst->xfrm;
} while (x && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL));
} while (x && !(x->outer_mode.flags & XFRM_MODE_FLAG_TUNNEL));
return 0;
@ -626,7 +626,7 @@ static int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb)
inner_mode = xfrm_ip2inner_mode(x,
xfrm_af2proto(skb_dst(skb)->ops->family));
else
inner_mode = x->inner_mode;
inner_mode = &x->inner_mode;
if (inner_mode == NULL)
return -EAFNOSUPPORT;