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net: common metrics init helper for FIB entries

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Consolidate initialization of ipv4 and ipv6 metrics when fib entries
are created into a single helper, ip_fib_metrics_init, that handles
the call to ip_metrics_convert.

If no metrics are defined for the fib entry, then the metrics is set
to dst_default_metrics.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern
2018-10-04 20:07:51 -07:00
committed by David S. Miller
parent d26d4b194e
commit 767a221753
5 changed files with 43 additions and 49 deletions
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30
net/ipv4/metrics.c
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@@ -5,8 +5,8 @@
#include <net/net_namespace.h>
#include <net/tcp.h>
int ip_metrics_convert(struct net *net, struct nlattr *fc_mx, int fc_mx_len,
u32 *metrics)
static int ip_metrics_convert(struct net *net, struct nlattr *fc_mx,
int fc_mx_len, u32 *metrics)
{
bool ecn_ca = false;
struct nlattr *nla;
@@ -52,4 +52,28 @@ int ip_metrics_convert(struct net *net, struct nlattr *fc_mx, int fc_mx_len,
return 0;
}
EXPORT_SYMBOL_GPL(ip_metrics_convert);
struct dst_metrics *ip_fib_metrics_init(struct net *net, struct nlattr *fc_mx,
int fc_mx_len)
{
struct dst_metrics *fib_metrics;
int err;
if (!fc_mx)
return (struct dst_metrics *)&dst_default_metrics;
fib_metrics = kzalloc(sizeof(*fib_metrics), GFP_KERNEL);
if (unlikely(!fib_metrics))
return ERR_PTR(-ENOMEM);
err = ip_metrics_convert(net, fc_mx, fc_mx_len, fib_metrics->metrics);
if (!err) {
refcount_set(&fib_metrics->refcnt, 1);
} else {
kfree(fib_metrics);
fib_metrics = ERR_PTR(err);
}
return fib_metrics;
}
EXPORT_SYMBOL_GPL(ip_fib_metrics_init);