tcp: metrics: Add source-address to tcp-metrics
We add the source-address to the tcp-metrics, so that different metrics
will be used per source/destination-pair. We use the destination-hash to
store the metric inside the hash-table. That way, deleting and dumping
via "ip tcp_metrics" is easy.
Signed-off-by: Christoph Paasch <christoph.paasch@uclouvain.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index f9b5f51..de32aa4 100644
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -31,6 +31,7 @@
struct tcp_metrics_block {
struct tcp_metrics_block __rcu *tcpm_next;
+ struct inetpeer_addr tcpm_saddr;
struct inetpeer_addr tcpm_daddr;
unsigned long tcpm_stamp;
u32 tcpm_ts;
@@ -131,6 +132,7 @@
}
static struct tcp_metrics_block *tcpm_new(struct dst_entry *dst,
+ struct inetpeer_addr *saddr,
struct inetpeer_addr *daddr,
unsigned int hash,
bool reclaim)
@@ -155,6 +157,7 @@
if (!tm)
goto out_unlock;
}
+ tm->tcpm_saddr = *saddr;
tm->tcpm_daddr = *daddr;
tcpm_suck_dst(tm, dst, true);
@@ -189,7 +192,8 @@
return NULL;
}
-static struct tcp_metrics_block *__tcp_get_metrics(const struct inetpeer_addr *daddr,
+static struct tcp_metrics_block *__tcp_get_metrics(const struct inetpeer_addr *saddr,
+ const struct inetpeer_addr *daddr,
struct net *net, unsigned int hash)
{
struct tcp_metrics_block *tm;
@@ -197,7 +201,8 @@
for (tm = rcu_dereference(net->ipv4.tcp_metrics_hash[hash].chain); tm;
tm = rcu_dereference(tm->tcpm_next)) {
- if (addr_same(&tm->tcpm_daddr, daddr))
+ if (addr_same(&tm->tcpm_saddr, saddr) &&
+ addr_same(&tm->tcpm_daddr, daddr))
break;
depth++;
}
@@ -208,18 +213,21 @@
struct dst_entry *dst)
{
struct tcp_metrics_block *tm;
- struct inetpeer_addr daddr;
+ struct inetpeer_addr saddr, daddr;
unsigned int hash;
struct net *net;
+ saddr.family = req->rsk_ops->family;
daddr.family = req->rsk_ops->family;
switch (daddr.family) {
case AF_INET:
+ saddr.addr.a4 = inet_rsk(req)->ir_loc_addr;
daddr.addr.a4 = inet_rsk(req)->ir_rmt_addr;
hash = (__force unsigned int) daddr.addr.a4;
break;
#if IS_ENABLED(CONFIG_IPV6)
case AF_INET6:
+ *(struct in6_addr *)saddr.addr.a6 = inet_rsk(req)->ir_v6_loc_addr;
*(struct in6_addr *)daddr.addr.a6 = inet_rsk(req)->ir_v6_rmt_addr;
hash = ipv6_addr_hash(&inet_rsk(req)->ir_v6_rmt_addr);
break;
@@ -233,7 +241,8 @@
for (tm = rcu_dereference(net->ipv4.tcp_metrics_hash[hash].chain); tm;
tm = rcu_dereference(tm->tcpm_next)) {
- if (addr_same(&tm->tcpm_daddr, &daddr))
+ if (addr_same(&tm->tcpm_saddr, &saddr) &&
+ addr_same(&tm->tcpm_daddr, &daddr))
break;
}
tcpm_check_stamp(tm, dst);
@@ -243,18 +252,21 @@
static struct tcp_metrics_block *__tcp_get_metrics_tw(struct inet_timewait_sock *tw)
{
struct tcp_metrics_block *tm;
- struct inetpeer_addr daddr;
+ struct inetpeer_addr saddr, daddr;
unsigned int hash;
struct net *net;
+ saddr.family = tw->tw_family;
daddr.family = tw->tw_family;
switch (daddr.family) {
case AF_INET:
+ saddr.addr.a4 = tw->tw_rcv_saddr;
daddr.addr.a4 = tw->tw_daddr;
hash = (__force unsigned int) daddr.addr.a4;
break;
#if IS_ENABLED(CONFIG_IPV6)
case AF_INET6:
+ *(struct in6_addr *)saddr.addr.a6 = tw->tw_v6_rcv_saddr;
*(struct in6_addr *)daddr.addr.a6 = tw->tw_v6_daddr;
hash = ipv6_addr_hash(&tw->tw_v6_daddr);
break;
@@ -268,7 +280,8 @@
for (tm = rcu_dereference(net->ipv4.tcp_metrics_hash[hash].chain); tm;
tm = rcu_dereference(tm->tcpm_next)) {
- if (addr_same(&tm->tcpm_daddr, &daddr))
+ if (addr_same(&tm->tcpm_saddr, &saddr) &&
+ addr_same(&tm->tcpm_daddr, &daddr))
break;
}
return tm;
@@ -279,19 +292,22 @@
bool create)
{
struct tcp_metrics_block *tm;
- struct inetpeer_addr daddr;
+ struct inetpeer_addr saddr, daddr;
unsigned int hash;
struct net *net;
bool reclaim;
+ saddr.family = sk->sk_family;
daddr.family = sk->sk_family;
switch (daddr.family) {
case AF_INET:
+ saddr.addr.a4 = inet_sk(sk)->inet_saddr;
daddr.addr.a4 = inet_sk(sk)->inet_daddr;
hash = (__force unsigned int) daddr.addr.a4;
break;
#if IS_ENABLED(CONFIG_IPV6)
case AF_INET6:
+ *(struct in6_addr *)saddr.addr.a6 = sk->sk_v6_rcv_saddr;
*(struct in6_addr *)daddr.addr.a6 = sk->sk_v6_daddr;
hash = ipv6_addr_hash(&sk->sk_v6_daddr);
break;
@@ -303,14 +319,14 @@
net = dev_net(dst->dev);
hash = hash_32(hash, net->ipv4.tcp_metrics_hash_log);
- tm = __tcp_get_metrics(&daddr, net, hash);
+ tm = __tcp_get_metrics(&saddr, &daddr, net, hash);
reclaim = false;
if (tm == TCP_METRICS_RECLAIM_PTR) {
reclaim = true;
tm = NULL;
}
if (!tm && create)
- tm = tcpm_new(dst, &daddr, hash, reclaim);
+ tm = tcpm_new(dst, &saddr, &daddr, hash, reclaim);
else
tcpm_check_stamp(tm, dst);