[PATCH v2 3/3] netlink: add LINKSTATE SQI support

[Oleksij Rempel]

Some PHYs provide Signal Quality Index (SQI) if the link is in active
state. This information can help to diagnose cable and system design
related issues.

Signed-off-by: Oleksij Rempel <o.rem...@pengutronix.de>
Reviewed-by: Florian Fainelli <f.faine...@gmail.com>
---
 netlink/desc-ethtool.c |  2 ++
 netlink/settings.c     | 16 ++++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/netlink/desc-ethtool.c b/netlink/desc-ethtool.c
index b0a793c..8f4c36b 100644
--- a/netlink/desc-ethtool.c
+++ b/netlink/desc-ethtool.c
@@ -93,6 +93,8 @@ static const struct pretty_nla_desc __linkstate_desc[] = {
        NLATTR_DESC_INVALID(ETHTOOL_A_LINKSTATE_UNSPEC),
        NLATTR_DESC_NESTED(ETHTOOL_A_LINKSTATE_HEADER, header),
        NLATTR_DESC_BOOL(ETHTOOL_A_LINKSTATE_LINK),
+       NLATTR_DESC_U32(ETHTOOL_A_LINKSTATE_SQI),
+       NLATTR_DESC_U32(ETHTOOL_A_LINKSTATE_SQI_MAX),
 };
 
 static const struct pretty_nla_desc __debug_desc[] = {
diff --git a/netlink/settings.c b/netlink/settings.c
index 851de15..cd4b9a7 100644
--- a/netlink/settings.c
+++ b/netlink/settings.c
@@ -638,6 +638,22 @@ int linkstate_reply_cb(const struct nlmsghdr *nlhdr, void 
*data)
                printf("\tLink detected: %s\n", val ? "yes" : "no");
        }
 
+       if (tb[ETHTOOL_A_LINKSTATE_SQI]) {
+               uint32_t val = mnl_attr_get_u32(tb[ETHTOOL_A_LINKSTATE_SQI]);
+
+               print_banner(nlctx);
+               printf("\tSQI: %u", val);
+
+               if (tb[ETHTOOL_A_LINKSTATE_SQI_MAX]) {
+                       uint32_t max;
+
+                       max = mnl_attr_get_u32(tb[ETHTOOL_A_LINKSTATE_SQI_MAX]);
+                       printf("/%u\n", max);
+               } else {
+                       printf("\n");
+               }
+       }
+
        return MNL_CB_OK;
 }
 
-- 
2.26.2