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| author | Amir Vadai <amirv@mellanox.com> | 2012-04-04 21:33:30 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-04-05 05:08:04 -0400 |
| commit | 08f10affe45051e18e0d8291c0a53aecef1b8a14 (patch) | |
| tree | 0f18aa6f7d3885f695dfe5ad876363afe03ce6a6 /net/dcb | |
| parent | 366cddb4028858079a9a8145bd713c13a9edb3dc (diff) | |
| download | linux-08f10affe45051e18e0d8291c0a53aecef1b8a14.tar.gz linux-08f10affe45051e18e0d8291c0a53aecef1b8a14.tar.bz2 linux-08f10affe45051e18e0d8291c0a53aecef1b8a14.zip | |
net/dcb: Add an optional max rate attribute
Although not specified in 8021Qaz spec, it could be useful to enable drivers
whose HW supports setting a rate limit for an ETS TC. This patch adds this
optional attribute to DCB netlink. To use it, drivers should implement and
register the callbacks ieee_setmaxrate and ieee_getmaxrate. The units are 64
bits long and specified in Kbps to enable usage over both slow and very fast
networks.
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dcb')
| -rw-r--r-- | net/dcb/dcbnl.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c index 36f37af63bf2..8dfa1da7c40d 100644 --- a/net/dcb/dcbnl.c +++ b/net/dcb/dcbnl.c @@ -178,6 +178,7 @@ static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = { [DCB_ATTR_IEEE_ETS] = {.len = sizeof(struct ieee_ets)}, [DCB_ATTR_IEEE_PFC] = {.len = sizeof(struct ieee_pfc)}, [DCB_ATTR_IEEE_APP_TABLE] = {.type = NLA_NESTED}, + [DCB_ATTR_IEEE_MAXRATE] = {.len = sizeof(struct ieee_maxrate)}, }; static const struct nla_policy dcbnl_ieee_app[DCB_ATTR_IEEE_APP_MAX + 1] = { @@ -1246,6 +1247,17 @@ static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev) goto nla_put_failure; } + if (ops->ieee_getmaxrate) { + struct ieee_maxrate maxrate; + err = ops->ieee_getmaxrate(netdev, &maxrate); + if (!err) { + err = nla_put(skb, DCB_ATTR_IEEE_MAXRATE, + sizeof(maxrate), &maxrate); + if (err) + goto nla_put_failure; + } + } + if (ops->ieee_getpfc) { struct ieee_pfc pfc; err = ops->ieee_getpfc(netdev, &pfc); @@ -1601,6 +1613,14 @@ static int dcbnl_ieee_set(struct net_device *netdev, struct nlattr **tb, goto err; } + if (ieee[DCB_ATTR_IEEE_MAXRATE] && ops->ieee_setmaxrate) { + struct ieee_maxrate *maxrate = + nla_data(ieee[DCB_ATTR_IEEE_MAXRATE]); + err = ops->ieee_setmaxrate(netdev, maxrate); + if (err) + goto err; + } + if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setpfc) { struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]); err = ops->ieee_setpfc(netdev, pfc); |