diff mbox series

[v1,net-next,09/11] ipv4: Convert devinet_sysctl_forward() to per-netns RTNL.

Message ID 20241018012225.90409-10-kuniyu@amazon.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series ipv4: Convert RTM_{NEW,DEL}ADDR and more to per-netns RTNL. | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 5 this patch: 5
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 3 this patch: 3
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 4 this patch: 4
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 24 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 1 this patch: 1
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-10-19--00-00 (tests: 777)

Commit Message

Kuniyuki Iwashima Oct. 18, 2024, 1:22 a.m. UTC 
devinet_sysctl_forward() touches only a single netns.

Let's use rtnl_trylock() and __in_dev_get_rtnl_net().

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
---
 net/ipv4/devinet.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Comments

Eric Dumazet Oct. 18, 2024, 1:56 p.m. UTC | #1 
On Fri, Oct 18, 2024 at 3:25 AM Kuniyuki Iwashima <kuniyu@amazon.com> wrote:
>
> devinet_sysctl_forward() touches only a single netns.
>
> Let's use rtnl_trylock() and __in_dev_get_rtnl_net().
>
> Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>

Reviewed-by: Eric Dumazet <edumazet@google.com>
diff mbox series

Patch

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,