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authorFlorian Westphal <fw@strlen.de>2019-03-29 21:16:32 +0100
committerSteffen Klassert <steffen.klassert@secunet.com>2019-04-08 09:15:28 +0200
commitc9500d7b7de8ff6ac88ee3e38b782889f1616593 (patch)
tree02e6040b32b9686f0f909e5e592dab6690be9275 /net/xfrm
parentxfrm: make xfrm modes builtin (diff)
downloadlinux-dev-c9500d7b7de8ff6ac88ee3e38b782889f1616593.tar.xz
linux-dev-c9500d7b7de8ff6ac88ee3e38b782889f1616593.zip
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 <fw@strlen.de> Reviewed-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/xfrm')
-rw-r--r--net/xfrm/xfrm_device.c10
-rw-r--r--net/xfrm/xfrm_input.c14
-rw-r--r--net/xfrm/xfrm_interface.c2
-rw-r--r--net/xfrm/xfrm_output.c20
-rw-r--r--net/xfrm/xfrm_policy.c2
-rw-r--r--net/xfrm/xfrm_state.c16
6 files changed, 32 insertions, 32 deletions
diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c
index a20f376fe71f..b24cd86a02c3 100644
--- a/net/xfrm/xfrm_device.c
+++ b/net/xfrm/xfrm_device.c
@@ -53,20 +53,20 @@ static void __xfrm_mode_tunnel_prep(struct xfrm_state *x, struct sk_buff *skb,
/* Adjust pointers into the packet when IPsec is done at layer2 */
static void xfrm_outer_mode_prep(struct xfrm_state *x, struct sk_buff *skb)
{
- switch (x->outer_mode->encap) {
+ switch (x->outer_mode.encap) {
case XFRM_MODE_TUNNEL:
- if (x->outer_mode->family == AF_INET)
+ if (x->outer_mode.family == AF_INET)
return __xfrm_mode_tunnel_prep(x, skb,
sizeof(struct iphdr));
- if (x->outer_mode->family == AF_INET6)
+ if (x->outer_mode.family == AF_INET6)
return __xfrm_mode_tunnel_prep(x, skb,
sizeof(struct ipv6hdr));
break;
case XFRM_MODE_TRANSPORT:
- if (x->outer_mode->family == AF_INET)
+ if (x->outer_mode.family == AF_INET)
return __xfrm_transport_prep(x, skb,
sizeof(struct iphdr));
- if (x->outer_mode->family == AF_INET6)
+ if (x->outer_mode.family == AF_INET6)
return __xfrm_transport_prep(x, skb,
sizeof(struct ipv6hdr));
break;
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();
diff --git a/net/xfrm/xfrm_interface.c b/net/xfrm/xfrm_interface.c
index 4fc49dbf3edf..b9f118530db6 100644
--- a/net/xfrm/xfrm_interface.c
+++ b/net/xfrm/xfrm_interface.c
@@ -273,7 +273,7 @@ static int xfrmi_rcv_cb(struct sk_buff *skb, int err)
xnet = !net_eq(xi->net, dev_net(skb->dev));
if (xnet) {
- 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);
diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c
index 3cb2a328a8ab..a55510f9ff35 100644
--- a/net/xfrm/xfrm_output.c
+++ b/net/xfrm/xfrm_output.c
@@ -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;
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 1a5fd2296556..16e70fc547b1 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -2595,7 +2595,7 @@ static struct dst_entry *xfrm_bundle_create(struct xfrm_policy *policy,
goto put_states;
}
} else
- inner_mode = xfrm[i]->inner_mode;
+ inner_mode = &xfrm[i]->inner_mode;
xdst->route = dst;
dst_copy_metrics(dst1, dst);
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index ace26f6dc790..d3d87c409f44 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -551,8 +551,6 @@ struct xfrm_state *xfrm_state_alloc(struct net *net)
x->lft.hard_packet_limit = XFRM_INF;
x->replay_maxage = 0;
x->replay_maxdiff = 0;
- x->inner_mode = NULL;
- x->inner_mode_iaf = NULL;
spin_lock_init(&x->lock);
}
return x;
@@ -2204,8 +2202,9 @@ int xfrm_state_mtu(struct xfrm_state *x, int mtu)
int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload)
{
- const struct xfrm_mode *inner_mode;
const struct xfrm_state_afinfo *afinfo;
+ const struct xfrm_mode *inner_mode;
+ const struct xfrm_mode *outer_mode;
int family = x->props.family;
int err;
@@ -2234,7 +2233,7 @@ int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload)
family != x->sel.family)
goto error;
- x->inner_mode = inner_mode;
+ x->inner_mode = *inner_mode;
} else {
const struct xfrm_mode *inner_mode_iaf;
int iafamily = AF_INET;
@@ -2246,7 +2245,7 @@ int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload)
if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL))
goto error;
- x->inner_mode = inner_mode;
+ x->inner_mode = *inner_mode;
if (x->props.family == AF_INET)
iafamily = AF_INET6;
@@ -2254,7 +2253,7 @@ int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload)
inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
if (inner_mode_iaf) {
if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
- x->inner_mode_iaf = inner_mode_iaf;
+ x->inner_mode_iaf = *inner_mode_iaf;
}
}
@@ -2268,12 +2267,13 @@ int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload)
if (err)
goto error;
- x->outer_mode = xfrm_get_mode(x->props.mode, family);
- if (x->outer_mode == NULL) {
+ outer_mode = xfrm_get_mode(x->props.mode, family);
+ if (!outer_mode) {
err = -EPROTONOSUPPORT;
goto error;
}
+ x->outer_mode = *outer_mode;
if (init_replay) {
err = xfrm_init_replay(x);
if (err)