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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , David Ahern CC: Kuniyuki Iwashima , Kuniyuki Iwashima , Subject: [PATCH v1 net-next 09/11] ipv4: Convert devinet_sysctl_forward() to per-netns RTNL. Date: Thu, 17 Oct 2024 18:22:23 -0700 Message-ID: <20241018012225.90409-10-kuniyu@amazon.com> X-Mailer: git-send-email 2.39.5 (Apple Git-154) In-Reply-To: <20241018012225.90409-1-kuniyu@amazon.com> References: <20241018012225.90409-1-kuniyu@amazon.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: EX19D038UWC003.ant.amazon.com (10.13.139.209) To EX19D004ANA001.ant.amazon.com (10.37.240.138) X-Patchwork-Delegate: kuba@kernel.org devinet_sysctl_forward() touches only a single netns. Let's use rtnl_trylock() and __in_dev_get_rtnl_net(). Signed-off-by: Kuniyuki Iwashima Reviewed-by: Eric Dumazet --- net/ipv4/devinet.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index f8e232dbb96a..1cc2c2b4a10a 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -2380,7 +2380,7 @@ static void inet_forward_change(struct net *net) if (on) dev_disable_lro(dev); - in_dev = __in_dev_get_rtnl(dev); + in_dev = __in_dev_get_rtnl_net(dev); if (in_dev) { IN_DEV_CONF_SET(in_dev, FORWARDING, on); inet_netconf_notify_devconf(net, RTM_NEWNETCONF, @@ -2471,7 +2471,7 @@ static int devinet_sysctl_forward(const struct ctl_table *ctl, int write, if (write && *valp != val) { if (valp != &IPV4_DEVCONF_DFLT(net, FORWARDING)) { - if (!rtnl_trylock()) { + if (!rtnl_net_trylock(net)) { /* Restore the original values before restarting */ *valp = val; *ppos = pos; @@ -2490,7 +2490,7 @@ static int devinet_sysctl_forward(const struct ctl_table *ctl, int write, idev->dev->ifindex, cnf); } - rtnl_unlock(); + rtnl_net_unlock(net); rt_cache_flush(net); } else inet_netconf_notify_devconf(net, RTM_NEWNETCONF,