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authorDavid Ahern <dsahern@gmail.com>2018-11-06 12:51:15 -0800
committerDavid S. Miller <davem@davemloft.net>2018-11-06 15:00:45 -0800
commitd7e774f356765d49b63490d611caa496713b7abb (patch)
tree73ed3592a8b38e709a05177c2dac09050c27b22b /net/ipv4/metrics.c
parentd0522f1cd25edb796548f91e04766fa3cbc3b6df (diff)
net: Add extack argument to ip_fib_metrics_init
Add extack argument to ip_fib_metrics_init and add messages for invalid metrics. Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/metrics.c')
-rw-r--r--net/ipv4/metrics.c26
1 files changed, 19 insertions, 7 deletions
diff --git a/net/ipv4/metrics.c b/net/ipv4/metrics.c
index 6d218f5a2e71..ca9a5fefdefa 100644
--- a/net/ipv4/metrics.c
+++ b/net/ipv4/metrics.c
@@ -6,7 +6,8 @@
#include <net/tcp.h>
static int ip_metrics_convert(struct net *net, struct nlattr *fc_mx,
- int fc_mx_len, u32 *metrics)
+ int fc_mx_len, u32 *metrics,
+ struct netlink_ext_ack *extack)
{
bool ecn_ca = false;
struct nlattr *nla;
@@ -21,19 +22,26 @@ static int ip_metrics_convert(struct net *net, struct nlattr *fc_mx,
if (!type)
continue;
- if (type > RTAX_MAX)
+ if (type > RTAX_MAX) {
+ NL_SET_ERR_MSG(extack, "Invalid metric type");
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)
+ if (val == TCP_CA_UNSPEC) {
+ NL_SET_ERR_MSG(extack, "Unknown tcp congestion algorithm");
return -EINVAL;
+ }
} else {
- if (nla_len(nla) != sizeof(u32))
+ if (nla_len(nla) != sizeof(u32)) {
+ NL_SET_ERR_MSG_ATTR(extack, nla,
+ "Invalid attribute in metrics");
return -EINVAL;
+ }
val = nla_get_u32(nla);
}
if (type == RTAX_ADVMSS && val > 65535 - 40)
@@ -42,8 +50,10 @@ static int ip_metrics_convert(struct net *net, struct nlattr *fc_mx,
val = 65535 - 15;
if (type == RTAX_HOPLIMIT && val > 255)
val = 255;
- if (type == RTAX_FEATURES && (val & ~RTAX_FEATURE_MASK))
+ if (type == RTAX_FEATURES && (val & ~RTAX_FEATURE_MASK)) {
+ NL_SET_ERR_MSG(extack, "Unknown flag set in feature mask in metrics attribute");
return -EINVAL;
+ }
metrics[type - 1] = val;
}
@@ -54,7 +64,8 @@ static int ip_metrics_convert(struct net *net, struct nlattr *fc_mx,
}
struct dst_metrics *ip_fib_metrics_init(struct net *net, struct nlattr *fc_mx,
- int fc_mx_len)
+ int fc_mx_len,
+ struct netlink_ext_ack *extack)
{
struct dst_metrics *fib_metrics;
int err;
@@ -66,7 +77,8 @@ struct dst_metrics *ip_fib_metrics_init(struct net *net, struct nlattr *fc_mx,
if (unlikely(!fib_metrics))
return ERR_PTR(-ENOMEM);
- err = ip_metrics_convert(net, fc_mx, fc_mx_len, fib_metrics->metrics);
+ err = ip_metrics_convert(net, fc_mx, fc_mx_len, fib_metrics->metrics,
+ extack);
if (!err) {
refcount_set(&fib_metrics->refcnt, 1);
} else {