forked from Minki/linux
a919525ad8
Move logic of fib_convert_metrics into ip_metrics_convert. This allows the code that converts netlink attributes into metrics struct to be re-used in a later patch by IPv6. This is mostly a code move with the following changes to variable names: - fi->fib_net becomes net - fc_mx and fc_mx_len are passed as inputs pulled from fib_config - metrics array is passed as an input from fi->fib_metrics->metrics Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
#include <linux/netlink.h>
|
|
#include <linux/rtnetlink.h>
|
|
#include <linux/types.h>
|
|
#include <net/ip.h>
|
|
#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)
|
|
{
|
|
bool ecn_ca = false;
|
|
struct nlattr *nla;
|
|
int remaining;
|
|
|
|
if (!fc_mx)
|
|
return 0;
|
|
|
|
nla_for_each_attr(nla, fc_mx, fc_mx_len, remaining) {
|
|
int type = nla_type(nla);
|
|
u32 val;
|
|
|
|
if (!type)
|
|
continue;
|
|
if (type > RTAX_MAX)
|
|
return -EINVAL;
|
|
|
|
if (type == RTAX_CC_ALGO) {
|
|
char tmp[TCP_CA_NAME_MAX];
|
|
|
|
nla_strlcpy(tmp, nla, sizeof(tmp));
|
|
val = tcp_ca_get_key_by_name(net, tmp, &ecn_ca);
|
|
if (val == TCP_CA_UNSPEC)
|
|
return -EINVAL;
|
|
} else {
|
|
val = nla_get_u32(nla);
|
|
}
|
|
if (type == RTAX_ADVMSS && val > 65535 - 40)
|
|
val = 65535 - 40;
|
|
if (type == RTAX_MTU && val > 65535 - 15)
|
|
val = 65535 - 15;
|
|
if (type == RTAX_HOPLIMIT && val > 255)
|
|
val = 255;
|
|
if (type == RTAX_FEATURES && (val & ~RTAX_FEATURE_MASK))
|
|
return -EINVAL;
|
|
metrics[type - 1] = val;
|
|
}
|
|
|
|
if (ecn_ca)
|
|
metrics[RTAX_FEATURES - 1] |= DST_FEATURE_ECN_CA;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ip_metrics_convert);
|