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Miller" , Bobby Eshleman , Chris J Arges , David Ahern , David Wei , Dimitri Daskalakis , Donald Hunter , Eric Dumazet , Gal Pressman , Ido Schimmel , Jakub Kicinski , Paolo Abeni , Shuah Khan , Simon Horman , Stanislav Fomichev , Willem de Bruijn , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH net-next v4 05/10] ipv6: expose the route deletion reason in RTM_DELROUTE Date: Wed, 29 Jul 2026 21:07:34 +0900 Message-ID: <20260729120739.47880-6-sigefriedhyy@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260729120739.47880-1-sigefriedhyy@gmail.com> References: <20260729120739.47880-1-sigefriedhyy@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Emit RTA_DEL_REASON from rt6_fill_node() when the deletion reason is not RTA_DEL_REASON_UNSPEC, and reserve room for it in rt6_nlmsg_size(). Every caller still passes RTA_DEL_REASON_UNSPEC. Signed-off-by: Yuyang Huang --- net/ipv6/route.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/net/ipv6/route.c b/net/ipv6/route.c index b30becf3f56b..b67c8a31ccd6 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -5749,6 +5749,7 @@ static size_t rt6_nlmsg_size(struct fib6_info *f6i) + nla_total_size(sizeof(struct rta_cacheinfo)) + nla_total_size(TCP_CA_NAME_MAX) /* RTAX_CC_ALGO */ + nla_total_size(1) /* RTA_PREF */ + + nla_total_size(4) /* RTA_DEL_REASON */ + nexthop_len; } @@ -5964,6 +5965,10 @@ static int rt6_fill_node(struct net *net, struct sk_buff *skb, if (rtnl_put_cacheinfo(skb, dst, 0, expires, dst ? dst->error : 0) < 0) goto nla_put_failure; + if (del_reason != RTA_DEL_REASON_UNSPEC && + nla_put_u32(skb, RTA_DEL_REASON, del_reason)) + goto nla_put_failure; + if (nla_put_u8(skb, RTA_PREF, IPV6_EXTRACT_PREF(rt6_flags))) goto nla_put_failure; -- 2.43.0