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Diffstat (limited to 'net/ipv4/icmp.c')
-rw-r--r--net/ipv4/icmp.c74
1 files changed, 43 insertions, 31 deletions
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 5882f584910e..f5203fba6236 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -190,7 +190,7 @@ EXPORT_SYMBOL(icmp_err_convert);
*/
struct icmp_control {
- void (*handler)(struct sk_buff *skb);
+ bool (*handler)(struct sk_buff *skb);
short error; /* This ICMP is classed as an error message */
};
@@ -205,7 +205,7 @@ static const struct icmp_control icmp_pointers[NR_ICMP_TYPES+1];
*/
static struct sock *icmp_sk(struct net *net)
{
- return net->ipv4.icmp_sk[smp_processor_id()];
+ return *this_cpu_ptr(net->ipv4.icmp_sk);
}
static inline struct sock *icmp_xmit_lock(struct net *net)
@@ -399,7 +399,7 @@ static void icmp_reply(struct icmp_bxm *icmp_param, struct sk_buff *skb)
return;
sk = icmp_xmit_lock(net);
- if (sk == NULL)
+ if (!sk)
return;
inet = inet_sk(sk);
@@ -609,7 +609,7 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
skb_in->data,
sizeof(_inner_type),
&_inner_type);
- if (itp == NULL)
+ if (!itp)
goto out;
/*
@@ -627,7 +627,7 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
return;
sk = icmp_xmit_lock(net);
- if (sk == NULL)
+ if (!sk)
goto out_free;
/*
@@ -746,7 +746,7 @@ static bool icmp_tag_validation(int proto)
* ICMP_PARAMETERPROB.
*/
-static void icmp_unreach(struct sk_buff *skb)
+static bool icmp_unreach(struct sk_buff *skb)
{
const struct iphdr *iph;
struct icmphdr *icmph;
@@ -784,8 +784,8 @@ static void icmp_unreach(struct sk_buff *skb)
*/
switch (net->ipv4.sysctl_ip_no_pmtu_disc) {
default:
- LIMIT_NETDEBUG(KERN_INFO pr_fmt("%pI4: fragmentation needed and DF set\n"),
- &iph->daddr);
+ net_dbg_ratelimited("%pI4: fragmentation needed and DF set\n",
+ &iph->daddr);
break;
case 2:
goto out;
@@ -798,8 +798,8 @@ static void icmp_unreach(struct sk_buff *skb)
}
break;
case ICMP_SR_FAILED:
- LIMIT_NETDEBUG(KERN_INFO pr_fmt("%pI4: Source Route Failed\n"),
- &iph->daddr);
+ net_dbg_ratelimited("%pI4: Source Route Failed\n",
+ &iph->daddr);
break;
default:
break;
@@ -839,10 +839,10 @@ static void icmp_unreach(struct sk_buff *skb)
icmp_socket_deliver(skb, info);
out:
- return;
+ return true;
out_err:
ICMP_INC_STATS_BH(net, ICMP_MIB_INERRORS);
- goto out;
+ return false;
}
@@ -850,17 +850,20 @@ out_err:
* Handle ICMP_REDIRECT.
*/
-static void icmp_redirect(struct sk_buff *skb)
+static bool icmp_redirect(struct sk_buff *skb)
{
if (skb->len < sizeof(struct iphdr)) {
ICMP_INC_STATS_BH(dev_net(skb->dev), ICMP_MIB_INERRORS);
- return;
+ return false;
}
- if (!pskb_may_pull(skb, sizeof(struct iphdr)))
- return;
+ if (!pskb_may_pull(skb, sizeof(struct iphdr))) {
+ /* there aught to be a stat */
+ return false;
+ }
icmp_socket_deliver(skb, icmp_hdr(skb)->un.gateway);
+ return true;
}
/*
@@ -875,7 +878,7 @@ static void icmp_redirect(struct sk_buff *skb)
* See also WRT handling of options once they are done and working.
*/
-static void icmp_echo(struct sk_buff *skb)
+static bool icmp_echo(struct sk_buff *skb)
{
struct net *net;
@@ -891,6 +894,8 @@ static void icmp_echo(struct sk_buff *skb)
icmp_param.head_len = sizeof(struct icmphdr);
icmp_reply(&icmp_param, skb);
}
+ /* should there be an ICMP stat for ignored echos? */
+ return true;
}
/*
@@ -900,7 +905,7 @@ static void icmp_echo(struct sk_buff *skb)
* MUST be accurate to a few minutes.
* MUST be updated at least at 15Hz.
*/
-static void icmp_timestamp(struct sk_buff *skb)
+static bool icmp_timestamp(struct sk_buff *skb)
{
struct timespec tv;
struct icmp_bxm icmp_param;
@@ -927,15 +932,17 @@ static void icmp_timestamp(struct sk_buff *skb)
icmp_param.data_len = 0;
icmp_param.head_len = sizeof(struct icmphdr) + 12;
icmp_reply(&icmp_param, skb);
-out:
- return;
+ return true;
+
out_err:
ICMP_INC_STATS_BH(dev_net(skb_dst(skb)->dev), ICMP_MIB_INERRORS);
- goto out;
+ return false;
}
-static void icmp_discard(struct sk_buff *skb)
+static bool icmp_discard(struct sk_buff *skb)
{
+ /* pretend it was a success */
+ return true;
}
/*
@@ -946,6 +953,7 @@ int icmp_rcv(struct sk_buff *skb)
struct icmphdr *icmph;
struct rtable *rt = skb_rtable(skb);
struct net *net = dev_net(rt->dst.dev);
+ bool success;
if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) {
struct sec_path *sp = skb_sec_path(skb);
@@ -1012,7 +1020,12 @@ int icmp_rcv(struct sk_buff *skb)
}
}
- icmp_pointers[icmph->type].handler(skb);
+ success = icmp_pointers[icmph->type].handler(skb);
+
+ if (success) {
+ consume_skb(skb);
+ return 0;
+ }
drop:
kfree_skb(skb);
@@ -1127,8 +1140,8 @@ static void __net_exit icmp_sk_exit(struct net *net)
int i;
for_each_possible_cpu(i)
- inet_ctl_sock_destroy(net->ipv4.icmp_sk[i]);
- kfree(net->ipv4.icmp_sk);
+ inet_ctl_sock_destroy(*per_cpu_ptr(net->ipv4.icmp_sk, i));
+ free_percpu(net->ipv4.icmp_sk);
net->ipv4.icmp_sk = NULL;
}
@@ -1136,9 +1149,8 @@ static int __net_init icmp_sk_init(struct net *net)
{
int i, err;
- net->ipv4.icmp_sk =
- kzalloc(nr_cpu_ids * sizeof(struct sock *), GFP_KERNEL);
- if (net->ipv4.icmp_sk == NULL)
+ net->ipv4.icmp_sk = alloc_percpu(struct sock *);
+ if (!net->ipv4.icmp_sk)
return -ENOMEM;
for_each_possible_cpu(i) {
@@ -1149,7 +1161,7 @@ static int __net_init icmp_sk_init(struct net *net)
if (err < 0)
goto fail;
- net->ipv4.icmp_sk[i] = sk;
+ *per_cpu_ptr(net->ipv4.icmp_sk, i) = sk;
/* Enough space for 2 64K ICMP packets, including
* sk_buff/skb_shared_info struct overhead.
@@ -1190,8 +1202,8 @@ static int __net_init icmp_sk_init(struct net *net)
fail:
for_each_possible_cpu(i)
- inet_ctl_sock_destroy(net->ipv4.icmp_sk[i]);
- kfree(net->ipv4.icmp_sk);
+ inet_ctl_sock_destroy(*per_cpu_ptr(net->ipv4.icmp_sk, i));
+ free_percpu(net->ipv4.icmp_sk);
return err;
}
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-09 09:08:25 +0100