diff mbox series

[net-next,07/16] gtp: use exit_batch_rtnl() method

Message ID 20240201170937.3549878-8-edumazet@google.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series net: more factorization in cleanup_net() paths | expand

Checks

Context Check Description
netdev/series_format fail Series longer than 15 patches (and no cover letter)
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: 1048 this patch: 1048
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 0 of 0 maintainers
netdev/build_clang success Errors and warnings before: 1065 this patch: 1065
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: 1065 this patch: 1065
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 33 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Eric Dumazet Feb. 1, 2024, 5:09 p.m. UTC 
exit_batch_rtnl() is called while RTNL is held,
and devices to be unregistered can be queued in the dev_kill_list.

This saves one rtnl_lock()/rtnl_unlock() pair per netns
and one unregister_netdevice_many() call per netns.

Signed-off-by: Eric Dumazet <edumazet@google.com>
---
 drivers/net/gtp.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c
index b1919278e931f4e9fb6b2d2ec2feb2193b2cda61..62c601d9f7528d456dc6695814bf01a4d756d2da 100644
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -1876,23 +1876,23 @@  static int __net_init gtp_net_init(struct net *net)
 	return 0;
 }
 
-static void __net_exit gtp_net_exit(struct net *net)
+static void __net_exit gtp_net_exit_batch_rtnl(struct list_head *net_list,
+					       struct list_head *dev_to_kill)
 {
-	struct gtp_net *gn = net_generic(net, gtp_net_id);
-	struct gtp_dev *gtp;
-	LIST_HEAD(list);
+	struct net *net;
 
-	rtnl_lock();
-	list_for_each_entry(gtp, &gn->gtp_dev_list, list)
-		gtp_dellink(gtp->dev, &list);
+	list_for_each_entry(net, net_list, exit_list) {
+		struct gtp_net *gn = net_generic(net, gtp_net_id);
+		struct gtp_dev *gtp;
 
-	unregister_netdevice_many(&list);
-	rtnl_unlock();
+		list_for_each_entry(gtp, &gn->gtp_dev_list, list)
+			gtp_dellink(gtp->dev, dev_to_kill);
+	}
 }
 
 static struct pernet_operations gtp_net_ops = {
 	.init	= gtp_net_init,
-	.exit	= gtp_net_exit,
+	.exit_batch_rtnl = gtp_net_exit_batch_rtnl,
 	.id	= &gtp_net_id,
 	.size	= sizeof(struct gtp_net),
 };