From a919525ad832d2bb1388b2303832a2307b30aeff Mon Sep 17 00:00:00 2001 From: David Ahern Date: Tue, 17 Apr 2018 17:33:07 -0700 Subject: net: Move fib_convert_metrics to metrics file 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 Signed-off-by: David S. Miller --- net/ipv4/metrics.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 net/ipv4/metrics.c (limited to 'net/ipv4/metrics.c') diff --git a/net/ipv4/metrics.c b/net/ipv4/metrics.c new file mode 100644 index 000000000000..5121c6475e6b --- /dev/null +++ b/net/ipv4/metrics.c @@ -0,0 +1,53 @@ +#include +#include +#include +#include +#include +#include + +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); -- cgit v1.2.3-59-g8ed1b