From 090096bf3db1c281ddd034573260045888a68fea Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Wed, 6 Mar 2013 15:39:42 +0000 Subject: [PATCH 1/4] net: generic fdb support for drivers without ndo_fdb_ If the driver does not support the ndo_op use the generic handler for it. This should work in the majority of cases. Eventually the fdb_dflt_add call gets translated into a __dev_set_rx_mode() call which should handle hardware support for filtering via the IFF_UNICAST_FLT flag. Namely IFF_UNICAST_FLT indicates if the hardware can do unicast address filtering. If no support is available the device is put into promisc mode. Signed-off-by: Vlad Yasevich Signed-off-by: John Fastabend Signed-off-by: David S. Miller --- include/linux/rtnetlink.h | 9 +++++ net/core/rtnetlink.c | 81 ++++++++++++++++++++++++++++++++++++--- 2 files changed, 84 insertions(+), 6 deletions(-) diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h index 489dd7bb28ec..f28544b2f9af 100644 --- a/include/linux/rtnetlink.h +++ b/include/linux/rtnetlink.h @@ -69,6 +69,15 @@ extern int ndo_dflt_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, struct net_device *dev, int idx); +extern int ndo_dflt_fdb_add(struct ndmsg *ndm, + struct nlattr *tb[], + struct net_device *dev, + const unsigned char *addr, + u16 flags); +extern int ndo_dflt_fdb_del(struct ndmsg *ndm, + struct nlattr *tb[], + struct net_device *dev, + const unsigned char *addr); extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, u16 mode); diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index b376410ff259..f95b6fbc29e9 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -2048,6 +2048,38 @@ errout: rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); } +/** + * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry + */ +int ndo_dflt_fdb_add(struct ndmsg *ndm, + struct nlattr *tb[], + struct net_device *dev, + const unsigned char *addr, + u16 flags) +{ + int err = -EINVAL; + + /* If aging addresses are supported device will need to + * implement its own handler for this. + */ + if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { + pr_info("%s: FDB only supports static addresses\n", dev->name); + return err; + } + + if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) + err = dev_uc_add_excl(dev, addr); + else if (is_multicast_ether_addr(addr)) + err = dev_mc_add_excl(dev, addr); + + /* Only return duplicate errors if NLM_F_EXCL is set */ + if (err == -EEXIST && !(flags & NLM_F_EXCL)) + err = 0; + + return err; +} +EXPORT_SYMBOL(ndo_dflt_fdb_add); + static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) { struct net *net = sock_net(skb->sk); @@ -2100,10 +2132,13 @@ static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) } /* Embedded bridge, macvlan, and any other device support */ - if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_add) { - err = dev->netdev_ops->ndo_fdb_add(ndm, tb, - dev, addr, - nlh->nlmsg_flags); + if ((ndm->ndm_flags & NTF_SELF)) { + if (dev->netdev_ops->ndo_fdb_add) + err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr, + nlh->nlmsg_flags); + else + err = ndo_dflt_fdb_add(ndm, tb, dev, addr, + nlh->nlmsg_flags); if (!err) { rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH); @@ -2114,6 +2149,35 @@ out: return err; } +/** + * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry + */ +int ndo_dflt_fdb_del(struct ndmsg *ndm, + struct nlattr *tb[], + struct net_device *dev, + const unsigned char *addr) +{ + int err = -EOPNOTSUPP; + + /* If aging addresses are supported device will need to + * implement its own handler for this. + */ + if (ndm->ndm_state & NUD_PERMANENT) { + pr_info("%s: FDB only supports static addresses\n", dev->name); + return -EINVAL; + } + + if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) + err = dev_uc_del(dev, addr); + else if (is_multicast_ether_addr(addr)) + err = dev_mc_del(dev, addr); + else + err = -EINVAL; + + return err; +} +EXPORT_SYMBOL(ndo_dflt_fdb_del); + static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) { struct net *net = sock_net(skb->sk); @@ -2171,8 +2235,11 @@ static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) } /* Embedded bridge, macvlan, and any other device support */ - if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_del) { - err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr); + if (ndm->ndm_flags & NTF_SELF) { + if (dev->netdev_ops->ndo_fdb_del) + err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr); + else + err = ndo_dflt_fdb_del(ndm, tb, dev, addr); if (!err) { rtnl_fdb_notify(dev, addr, RTM_DELNEIGH); @@ -2257,6 +2324,8 @@ static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) if (dev->netdev_ops->ndo_fdb_dump) idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx); + else + ndo_dflt_fdb_dump(skb, cb, dev, idx); } rcu_read_unlock(); From faaf02d24ce393032e9b60128cce529d09f7190e Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Wed, 6 Mar 2013 15:39:43 +0000 Subject: [PATCH 2/4] ixgbe: Make use of the default fdb handlers. For fdb_add, use the default handler in the non-SRIOV case. For the other fdb handlers, just remove them and use the default ones. CC: John Fastabend Acked-By: John Fastabend CC: CC: Gregory Rose Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 42 +------------------ 1 file changed, 1 insertion(+), 41 deletions(-) diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index db5611ae407e..e56a3d169e30 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -7007,7 +7007,7 @@ static int ixgbe_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], int err; if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)) - return -EOPNOTSUPP; + return ndo_dflt_fdb_add(ndm, tb, dev, addr, flags); /* Hardware does not support aging addresses so if a * ndm_state is given only allow permanent addresses @@ -7038,44 +7038,6 @@ static int ixgbe_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], return err; } -static int ixgbe_ndo_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], - struct net_device *dev, - const unsigned char *addr) -{ - struct ixgbe_adapter *adapter = netdev_priv(dev); - int err = -EOPNOTSUPP; - - if (ndm->ndm_state & NUD_PERMANENT) { - pr_info("%s: FDB only supports static addresses\n", - ixgbe_driver_name); - return -EINVAL; - } - - if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) { - if (is_unicast_ether_addr(addr)) - err = dev_uc_del(dev, addr); - else if (is_multicast_ether_addr(addr)) - err = dev_mc_del(dev, addr); - else - err = -EINVAL; - } - - return err; -} - -static int ixgbe_ndo_fdb_dump(struct sk_buff *skb, - struct netlink_callback *cb, - struct net_device *dev, - int idx) -{ - struct ixgbe_adapter *adapter = netdev_priv(dev); - - if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) - idx = ndo_dflt_fdb_dump(skb, cb, dev, idx); - - return idx; -} - static int ixgbe_ndo_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh) { @@ -7171,8 +7133,6 @@ static const struct net_device_ops ixgbe_netdev_ops = { .ndo_set_features = ixgbe_set_features, .ndo_fix_features = ixgbe_fix_features, .ndo_fdb_add = ixgbe_ndo_fdb_add, - .ndo_fdb_del = ixgbe_ndo_fdb_del, - .ndo_fdb_dump = ixgbe_ndo_fdb_dump, .ndo_bridge_setlink = ixgbe_ndo_bridge_setlink, .ndo_bridge_getlink = ixgbe_ndo_bridge_getlink, }; From 75a75ee46bab6f580bde5514a08f75f4db1f0a2d Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Wed, 6 Mar 2013 15:39:44 +0000 Subject: [PATCH 3/4] mlx4: Remove driver specific fdb handlers. Remove driver specific fdb hadlers since they are the same as the default ones. CC: Amir Vadai CC: Yan Burman Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- .../net/ethernet/mellanox/mlx4/en_netdev.c | 76 ------------------- 1 file changed, 76 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c index bb4d8d99f36d..4c37d487bb03 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c @@ -1924,79 +1924,6 @@ static int mlx4_en_set_features(struct net_device *netdev, } -static int mlx4_en_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], - struct net_device *dev, - const unsigned char *addr, u16 flags) -{ - struct mlx4_en_priv *priv = netdev_priv(dev); - struct mlx4_dev *mdev = priv->mdev->dev; - int err; - - if (!mlx4_is_mfunc(mdev)) - return -EOPNOTSUPP; - - /* Hardware does not support aging addresses, allow only - * permanent addresses if ndm_state is given - */ - if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { - en_info(priv, "Add FDB only supports static addresses\n"); - return -EINVAL; - } - - if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) - err = dev_uc_add_excl(dev, addr); - else if (is_multicast_ether_addr(addr)) - err = dev_mc_add_excl(dev, addr); - else - err = -EINVAL; - - /* Only return duplicate errors if NLM_F_EXCL is set */ - if (err == -EEXIST && !(flags & NLM_F_EXCL)) - err = 0; - - return err; -} - -static int mlx4_en_fdb_del(struct ndmsg *ndm, - struct nlattr *tb[], - struct net_device *dev, - const unsigned char *addr) -{ - struct mlx4_en_priv *priv = netdev_priv(dev); - struct mlx4_dev *mdev = priv->mdev->dev; - int err; - - if (!mlx4_is_mfunc(mdev)) - return -EOPNOTSUPP; - - if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { - en_info(priv, "Del FDB only supports static addresses\n"); - return -EINVAL; - } - - if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) - err = dev_uc_del(dev, addr); - else if (is_multicast_ether_addr(addr)) - err = dev_mc_del(dev, addr); - else - err = -EINVAL; - - return err; -} - -static int mlx4_en_fdb_dump(struct sk_buff *skb, - struct netlink_callback *cb, - struct net_device *dev, int idx) -{ - struct mlx4_en_priv *priv = netdev_priv(dev); - struct mlx4_dev *mdev = priv->mdev->dev; - - if (mlx4_is_mfunc(mdev)) - idx = ndo_dflt_fdb_dump(skb, cb, dev, idx); - - return idx; -} - static const struct net_device_ops mlx4_netdev_ops = { .ndo_open = mlx4_en_open, .ndo_stop = mlx4_en_close, @@ -2018,9 +1945,6 @@ static const struct net_device_ops mlx4_netdev_ops = { #ifdef CONFIG_RFS_ACCEL .ndo_rx_flow_steer = mlx4_en_filter_rfs, #endif - .ndo_fdb_add = mlx4_en_fdb_add, - .ndo_fdb_del = mlx4_en_fdb_del, - .ndo_fdb_dump = mlx4_en_fdb_dump, }; int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port, From 3e5c112f5f3a09e7b5a899ef87ce38de83f99f1a Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Wed, 6 Mar 2013 15:39:45 +0000 Subject: [PATCH 4/4] qlcnic: Use generic fdb handler when driver options are not enabled. Allow qlcnic to use the generic fdb handler when the driver options are not enabled. Untill the driver is fully fixed, this allows the use of the FDB interface with qlogic driver, but simply puts the driver into promisc mode since the driver currently does not support IFF_UNICAST_FLT. CC: Jitendra Kalsaria Acked-by: Jitendra Kalsaria CC: Sony Chacko CC: linux-driver@qlogic.com Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- .../net/ethernet/qlogic/qlcnic/qlcnic_main.c | 21 ++++++------------- 1 file changed, 6 insertions(+), 15 deletions(-) diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c index 28a6d4838364..c6f9d5eb7d50 100644 --- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c +++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c @@ -253,11 +253,8 @@ static int qlcnic_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], struct qlcnic_adapter *adapter = netdev_priv(netdev); int err = -EOPNOTSUPP; - if (!adapter->fdb_mac_learn) { - pr_info("%s: Driver mac learn is enabled, FDB operation not allowed\n", - __func__); - return err; - } + if (!adapter->fdb_mac_learn) + return ndo_dflt_fdb_del(ndm, tb, netdev, addr); if (adapter->flags & QLCNIC_ESWITCH_ENABLED) { if (is_unicast_ether_addr(addr)) @@ -277,11 +274,8 @@ static int qlcnic_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], struct qlcnic_adapter *adapter = netdev_priv(netdev); int err = 0; - if (!adapter->fdb_mac_learn) { - pr_info("%s: Driver mac learn is enabled, FDB operation not allowed\n", - __func__); - return -EOPNOTSUPP; - } + if (!adapter->fdb_mac_learn) + return ndo_dflt_fdb_add(ndm, tb, netdev, addr, flags); if (!(adapter->flags & QLCNIC_ESWITCH_ENABLED)) { pr_info("%s: FDB e-switch is not enabled\n", __func__); @@ -306,11 +300,8 @@ static int qlcnic_fdb_dump(struct sk_buff *skb, struct netlink_callback *ncb, { struct qlcnic_adapter *adapter = netdev_priv(netdev); - if (!adapter->fdb_mac_learn) { - pr_info("%s: Driver mac learn is enabled, FDB operation not allowed\n", - __func__); - return -EOPNOTSUPP; - } + if (!adapter->fdb_mac_learn) + return ndo_dflt_fdb_dump(skb, ncb, netdev, idx); if (adapter->flags & QLCNIC_ESWITCH_ENABLED) idx = ndo_dflt_fdb_dump(skb, ncb, netdev, idx);