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rtnetlink: add helpers to dump vf information

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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
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@ -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;
@ -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;