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[RTNETLINK]: Add rtnetlink notification interface

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Adds rtnl_notify() to send rtnetlink notification messages and
rtnl_set_sk_err() to report notification errors as socket
errors in order to indicate the need of a resync due to loss
of events.

nlmsg_report() is added to properly document the meaning of
NLM_F_ECHO.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Graf
2006-08-15 00:31:41 -07:00
committed by David S. Miller
parent d387f6ad10
commit 97676b6b55
3 changed files with 38 additions and 0 deletions
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18
net/core/rtnetlink.c
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@@ -171,6 +171,22 @@ int rtnl_unicast(struct sk_buff *skb, u32 pid)
return nlmsg_unicast(rtnl, skb, pid);
}
int rtnl_notify(struct sk_buff *skb, u32 pid, u32 group,
struct nlmsghdr *nlh, gfp_t flags)
{
int report = 0;
if (nlh)
report = nlmsg_report(nlh);
return nlmsg_notify(rtnl, skb, pid, group, report, flags);
}
void rtnl_set_sk_err(u32 group, int error)
{
netlink_set_err(rtnl, 0, group, error);
}
int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
{
struct rtattr *mx = (struct rtattr*)skb->tail;
@@ -829,3 +845,5 @@ EXPORT_SYMBOL(rtnl_lock);
EXPORT_SYMBOL(rtnl_trylock);
EXPORT_SYMBOL(rtnl_unlock);
EXPORT_SYMBOL(rtnl_unicast);
EXPORT_SYMBOL(rtnl_notify);
EXPORT_SYMBOL(rtnl_set_sk_err);