From ca752be006013ac6f19721280f44c91ef07ad3d1 Mon Sep 17 00:00:00 2001 From: David Ahern Date: Wed, 4 Oct 2017 17:48:50 -0700 Subject: [PATCH] net: bridge: Pass extack to down to netdev_master_upper_dev_link Pass extack arg to br_add_if. Add messages for a couple of failures and pass arg to netdev_master_upper_dev_link. Signed-off-by: David Ahern Acked-by: Stephen Hemminger Signed-off-by: David S. Miller --- net/bridge/br_device.c | 2 +- net/bridge/br_if.c | 15 +++++++++++---- net/bridge/br_ioctl.c | 2 +- net/bridge/br_private.h | 3 ++- 4 files changed, 15 insertions(+), 7 deletions(-) diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c index cb0131d70ab1..7acb77c9bd65 100644 --- a/net/bridge/br_device.c +++ b/net/bridge/br_device.c @@ -326,7 +326,7 @@ static int br_add_slave(struct net_device *dev, struct net_device *slave_dev, { struct net_bridge *br = netdev_priv(dev); - return br_add_if(br, slave_dev); + return br_add_if(br, slave_dev, extack); } static int br_del_slave(struct net_device *dev, struct net_device *slave_dev) diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c index 0a3fd727048d..59a74a414e20 100644 --- a/net/bridge/br_if.c +++ b/net/bridge/br_if.c @@ -480,7 +480,8 @@ netdev_features_t br_features_recompute(struct net_bridge *br, } /* called with RTNL */ -int br_add_if(struct net_bridge *br, struct net_device *dev) +int br_add_if(struct net_bridge *br, struct net_device *dev, + struct netlink_ext_ack *extack) { struct net_bridge_port *p; int err = 0; @@ -500,16 +501,22 @@ int br_add_if(struct net_bridge *br, struct net_device *dev) return -EINVAL; /* No bridging of bridges */ - if (dev->netdev_ops->ndo_start_xmit == br_dev_xmit) + if (dev->netdev_ops->ndo_start_xmit == br_dev_xmit) { + NL_SET_ERR_MSG(extack, + "Can not enslave a bridge to a bridge"); return -ELOOP; + } /* Device is already being bridged */ if (br_port_exists(dev)) return -EBUSY; /* No bridging devices that dislike that (e.g. wireless) */ - if (dev->priv_flags & IFF_DONT_BRIDGE) + if (dev->priv_flags & IFF_DONT_BRIDGE) { + NL_SET_ERR_MSG(extack, + "Device does not allow enslaving to a bridge"); return -EOPNOTSUPP; + } p = new_nbp(br, dev); if (IS_ERR(p)) @@ -540,7 +547,7 @@ int br_add_if(struct net_bridge *br, struct net_device *dev) dev->priv_flags |= IFF_BRIDGE_PORT; - err = netdev_master_upper_dev_link(dev, br->dev, NULL, NULL, NULL); + err = netdev_master_upper_dev_link(dev, br->dev, NULL, NULL, extack); if (err) goto err5; diff --git a/net/bridge/br_ioctl.c b/net/bridge/br_ioctl.c index 66cd98772051..8f29103935a3 100644 --- a/net/bridge/br_ioctl.c +++ b/net/bridge/br_ioctl.c @@ -98,7 +98,7 @@ static int add_del_if(struct net_bridge *br, int ifindex, int isadd) return -EINVAL; if (isadd) - ret = br_add_if(br, dev); + ret = br_add_if(br, dev, NULL); else ret = br_del_if(br, dev); diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 020c709a017f..ab4df24f7bba 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -566,7 +566,8 @@ void br_flood(struct net_bridge *br, struct sk_buff *skb, void br_port_carrier_check(struct net_bridge_port *p); int br_add_bridge(struct net *net, const char *name); int br_del_bridge(struct net *net, const char *name); -int br_add_if(struct net_bridge *br, struct net_device *dev); +int br_add_if(struct net_bridge *br, struct net_device *dev, + struct netlink_ext_ack *extack); int br_del_if(struct net_bridge *br, struct net_device *dev); int br_min_mtu(const struct net_bridge *br); netdev_features_t br_features_recompute(struct net_bridge *br, -- 2.30.2