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authorShmulik Ravid <shmulikr@broadcom.com>2011-02-27 05:04:31 +0000
committerDavid S. Miller <davem@davemloft.net>2011-03-02 21:58:54 -0800
commiteed84713bc47ce2f7d675914f297ad9b6227a587 (patch)
tree27da816e2d37163409639639c37171bb4c53945c /net/dcb
parent23b41168fc942a4a041325a04ecc1bd17d031a3e (diff)
downloadlinux-eed84713bc47ce2f7d675914f297ad9b6227a587.tar.gz
dcbnl: add support for retrieving peer configuration - ieee
These 2 patches add the support for retrieving the remote or peer DCBX configuration via dcbnl for embedded DCBX stacks. The peer configuration is part of the DCBX MIB and is useful for debugging and diagnostics of the overall DCB configuration. The first patch add this support for IEEE 802.1Qaz standard the second patch add the same support for the older CEE standard. Diff for v2 - the peer-app-info is CEE specific. Signed-off-by: Shmulik Ravid <shmulikr@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dcb')
-rw-r--r--net/dcb/dcbnl.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c
index d5074a56728..2e6dcf2967e 100644
--- a/net/dcb/dcbnl.c
+++ b/net/dcb/dcbnl.c
@@ -1224,6 +1224,54 @@ err:
return err;
}
+static int dcbnl_build_peer_app(struct net_device *netdev, struct sk_buff* skb)
+{
+ struct dcb_peer_app_info info;
+ struct dcb_app *table = NULL;
+ const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
+ u16 app_count;
+ int err;
+
+
+ /**
+ * retrieve the peer app configuration form the driver. If the driver
+ * handlers fail exit without doing anything
+ */
+ err = ops->peer_getappinfo(netdev, &info, &app_count);
+ if (!err && app_count) {
+ table = kmalloc(sizeof(struct dcb_app) * app_count, GFP_KERNEL);
+ if (!table)
+ return -ENOMEM;
+
+ err = ops->peer_getapptable(netdev, table);
+ }
+
+ if (!err) {
+ u16 i;
+ struct nlattr *app;
+
+ /**
+ * build the message, from here on the only possible failure
+ * is due to the skb size
+ */
+ err = -EMSGSIZE;
+
+ app = nla_nest_start(skb, DCB_ATTR_IEEE_PEER_APP);
+ if (!app)
+ goto nla_put_failure;
+
+ for (i = 0; i < app_count; i++)
+ NLA_PUT(skb, DCB_ATTR_IEEE_APP, sizeof(struct dcb_app),
+ &table[i]);
+
+ nla_nest_end(skb, app);
+ }
+ err = 0;
+
+nla_put_failure:
+ kfree(table);
+ return err;
+}
/* Handle IEEE 802.1Qaz GET commands. */
static int dcbnl_ieee_get(struct net_device *netdev, struct nlattr **tb,
@@ -1288,6 +1336,27 @@ static int dcbnl_ieee_get(struct net_device *netdev, struct nlattr **tb,
spin_unlock(&dcb_lock);
nla_nest_end(skb, app);
+ /* get peer info if available */
+ if (ops->ieee_peer_getets) {
+ struct ieee_ets ets;
+ err = ops->ieee_peer_getets(netdev, &ets);
+ if (!err)
+ NLA_PUT(skb, DCB_ATTR_IEEE_PEER_ETS, sizeof(ets), &ets);
+ }
+
+ if (ops->ieee_peer_getpfc) {
+ struct ieee_pfc pfc;
+ err = ops->ieee_peer_getpfc(netdev, &pfc);
+ if (!err)
+ NLA_PUT(skb, DCB_ATTR_IEEE_PEER_PFC, sizeof(pfc), &pfc);
+ }
+
+ if (ops->peer_getappinfo && ops->peer_getapptable) {
+ err = dcbnl_build_peer_app(netdev, skb);
+ if (err)
+ goto nla_put_failure;
+ }
+
nla_nest_end(skb, ieee);
nlmsg_end(skb, nlh);