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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 <[email protected]> Signed-off-by: David S. Miller <[email protected]>
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,53 @@ | ||
#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> | ||
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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; | ||
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if (!fc_mx) | ||
return 0; | ||
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nla_for_each_attr(nla, fc_mx, fc_mx_len, remaining) { | ||
int type = nla_type(nla); | ||
u32 val; | ||
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if (!type) | ||
continue; | ||
if (type > RTAX_MAX) | ||
return -EINVAL; | ||
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if (type == RTAX_CC_ALGO) { | ||
char tmp[TCP_CA_NAME_MAX]; | ||
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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; | ||
} | ||
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if (ecn_ca) | ||
metrics[RTAX_FEATURES - 1] |= DST_FEATURE_ECN_CA; | ||
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return 0; | ||
} | ||
EXPORT_SYMBOL_GPL(ip_metrics_convert); |