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ipv6: add inet6_rt_del_notify()

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Move the body of inet6_rt_notify() to __inet6_rt_notify() and give it
the deletion reason. inet6_rt_notify() keeps its prototype, so the
route addition path does not change.

Add inet6_rt_del_notify() and call it from fib6_del_route().
RTA_DEL_REASON now reaches user space on RTM_DELROUTE for routes the
kernel deleted on its own.

Signed-off-by: Yuyang Huang <sigefriedhyy@gmail.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/20260808005642.26901-7-sigefriedhyy@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Yuyang Huang
2026-08-08 09:56:38 +09:00
committed by Paolo Abeni
parent 1e6a83af59
commit 09f19ce3de
3 changed files with 19 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/net/ip6_fib.h
View File

@@ -533,6 +533,8 @@ static inline void fib6_rt_update(struct net *net, struct fib6_info *rt,
#endif
void inet6_rt_notify(int event, struct fib6_info *rt, struct nl_info *info,
unsigned int flags);
void inet6_rt_del_notify(struct fib6_info *rt, struct nl_info *info,
enum rt_del_reason del_reason);
void fib6_age_exceptions(struct fib6_info *rt, struct fib6_gc_args *gc_args,
unsigned long now);

2
net/ipv6/ip6_fib.c
View File

@@ -2057,7 +2057,7 @@ static void fib6_del_route(struct fib6_table *table, struct fib6_node *fn,
call_fib6_entry_notifiers_replace(net, replace_rt);
}
if (!info->skip_notify)
inet6_rt_notify(RTM_DELROUTE, rt, info, 0);
inet6_rt_del_notify(rt, info, del_reason);
fib6_info_release(rt);
}

20
net/ipv6/route.c
View File

@@ -6378,8 +6378,9 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh,
return err;
}
void inet6_rt_notify(int event, struct fib6_info *rt, struct nl_info *info,
unsigned int nlm_flags)
static void __inet6_rt_notify(int event, struct fib6_info *rt,
struct nl_info *info, unsigned int nlm_flags,
enum rt_del_reason del_reason)
{
struct net *net = info->nl_net;
struct sk_buff *skb;
@@ -6398,8 +6399,7 @@ void inet6_rt_notify(int event, struct fib6_info *rt, struct nl_info *info,
goto errout;
err = rt6_fill_node(net, skb, rt, NULL, NULL, NULL, 0,
event, info->portid, seq, nlm_flags,
RT_DEL_REASON_UNSPEC);
event, info->portid, seq, nlm_flags, del_reason);
if (err < 0) {
kfree_skb(skb);
/* -EMSGSIZE implies needed space grew under us. */
@@ -6420,6 +6420,18 @@ void inet6_rt_notify(int event, struct fib6_info *rt, struct nl_info *info,
rtnl_set_sk_err(net, RTNLGRP_IPV6_ROUTE, err);
}
void inet6_rt_notify(int event, struct fib6_info *rt, struct nl_info *info,
unsigned int nlm_flags)
{
__inet6_rt_notify(event, rt, info, nlm_flags, RT_DEL_REASON_UNSPEC);
}
void inet6_rt_del_notify(struct fib6_info *rt, struct nl_info *info,
enum rt_del_reason del_reason)
{
__inet6_rt_notify(RTM_DELROUTE, rt, info, 0, del_reason);
}
void fib6_rt_update(struct net *net, struct fib6_info *rt,
struct nl_info *info)
{