netdev - [PATCH net-next 3/9] ipv4: convert fib_notify_on_flag

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Date:   Wed, 31 Mar 2021 10:52:07 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: [PATCH net-next 3/9] ipv4: convert fib_notify_on_flag_change sysctl to u8

From: Eric Dumazet <edumazet@...gle.com>

Reduce footprint of sysctls.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 include/net/netns/ipv4.h   | 2 +-
 net/ipv4/sysctl_net_ipv4.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index 538ed69919dc4d51acfd43c7d6d1fca611fcb003..b187ac597b8ce33376070bcd42c8c935b9c287eb 100644
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -191,7 +191,7 @@ struct netns_ipv4 {
 	int sysctl_udp_wmem_min;
 	int sysctl_udp_rmem_min;
 
-	int sysctl_fib_notify_on_flag_change;
+	u8 sysctl_fib_notify_on_flag_change;
 
 #ifdef CONFIG_NET_L3_MASTER_DEV
 	int sysctl_udp_l3mdev_accept;
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 9199f507a005efc3f57ca0225d3898bfa5d01c53..a2352d8d88cc9956ac0ddcaf351cbc996fa10add 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -1364,9 +1364,9 @@ static struct ctl_table ipv4_net_table[] = {
 	{
 		.procname	= "fib_notify_on_flag_change",
 		.data		= &init_net.ipv4.sysctl_fib_notify_on_flag_change,
-		.maxlen		= sizeof(int),
+		.maxlen		= sizeof(u8),
 		.mode		= 0644,
-		.proc_handler	= proc_dointvec_minmax,
+		.proc_handler	= proc_dou8vec_minmax,
 		.extra1		= SYSCTL_ZERO,
 		.extra2		= &two,
 	},
-- 
2.31.0.291.g576ba9dcdaf-goog