On 9/21/17 10:59 AM, Florian Westphal wrote:
> similar to earlier patches, split out more parts of this function to
> better see what is happening and where we assume rtnl is locked.
>
> Signed-off-by: Florian Westphal <f...@strlen.de>
> ---
> net/core/rtnetlink.c | 80
> ++++++++++++++++++++++++++++++++--------------------
> 1 file changed, 50 insertions(+), 30 deletions(-)
>
> diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
> index 1af3ef7f329d..7503021fe308 100644
> --- a/net/core/rtnetlink.c
> +++ b/net/core/rtnetlink.c
> @@ -1211,6 +1211,36 @@ static noinline_for_stack int rtnl_fill_vfinfo(struct
> sk_buff *skb,
> return -EMSGSIZE;
> }
>
> +static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
> + struct net_device *dev,
> + u32 ext_filter_mask)
> +{
> + struct nlattr *vfinfo;
> + int i, num_vfs;
> +
> + if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
> + return 0;
> +
> + num_vfs = dev_num_vf(dev->dev.parent);
> + if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
> + return -EMSGSIZE;
> +
> + if (!dev->netdev_ops->ndo_get_vf_config)
> + return 0;
> +
> + vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
> + if (!vfinfo)
> + return -EMSGSIZE;
> +
> + for (i = 0; i < num_vfs; i++) {
> + if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
> + return -EMSGSIZE;
> + }
> +
> + nla_nest_end(skb, vfinfo);
> + return 0;
> +}
> +
> static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
> {
> struct rtnl_link_ifmap map;
> @@ -1355,6 +1385,23 @@ static int noinline nla_put_ifalias(struct sk_buff
> *skb, struct net_device *dev)
> return 0;
> }
>
> +static int noinline rtnl_fill_link_netnsid(struct sk_buff *skb,
> + const struct net_device *dev)
> +{
> + if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
> + struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
> +
> + if (!net_eq(dev_net(dev), link_net)) {
> + int id = peernet2id_alloc(dev_net(dev), link_net);
> +
> + if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
> + return -EMSGSIZE;
> + }
> + }
> +
> + return 0;
> +}
> +
> static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
Similarly for this patch -- subject references vf helper yet the code
changes flips netnsid as well.
