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rtnetlink: add helpers to dump vf information 

similar to earlier patches, split out more parts of this function to
better see what is happening and where we assume rtnl is locked.

Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Westphal 2017-09-26 13:58:41 +02:00 committed by David S. Miller
parent 79110a0426
commit 250fc3dfdb
1 changed files with 31 additions and 19 deletions
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50
net/core/rtnetlink.c
View File

@ -1211,6 +1211,36 @@ nla_put_vfinfo_failure:
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;
@ -1407,27 +1437,9 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
if (rtnl_fill_stats(skb, dev))
goto nla_put_failure;
if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
if (rtnl_fill_vf(skb, dev, ext_filter_mask))
goto nla_put_failure;
if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
ext_filter_mask & RTEXT_FILTER_VF) {
int i;
struct nlattr *vfinfo;
int num_vfs = dev_num_vf(dev->dev.parent);
vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
if (!vfinfo)
goto nla_put_failure;
for (i = 0; i < num_vfs; i++) {
if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
goto nla_put_failure;
}
nla_nest_end(skb, vfinfo);
}
if (rtnl_port_fill(skb, dev, ext_filter_mask))
goto nla_put_failure;