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Message-ID: <20240729210801.16196-7-kuniyu@amazon.com>
Date: Mon, 29 Jul 2024 14:08:01 -0700
From: Kuniyuki Iwashima <kuniyu@...zon.com>
To: "David S. Miller" <davem@...emloft.net>, Eric Dumazet
<edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
<pabeni@...hat.com>
CC: Kuniyuki Iwashima <kuniyu@...zon.com>, Kuniyuki Iwashima
<kuni1840@...il.com>, <netdev@...r.kernel.org>
Subject: [PATCH v1 net-next 6/6] net: Initialise net.core sysctl defaults in preinit_net().
Commit 7c3f1875c66f ("net: move somaxconn init from sysctl code")
introduced net_defaults_ops to make sure that net.core sysctl knobs
are always initialised even if CONFIG_SYSCTL is disabled.
Such operations better fit preinit_net() added for a similar purpose
by commit 6e77a5a4af05 ("net: initialize net->notrefcnt_tracker earlier").
Let's initialise the sysctl defaults in preinit_net().
Signed-off-by: Kuniyuki Iwashima <kuniyu@...zon.com>
---
net/core/net_namespace.c | 37 +++++++++++--------------------------
1 file changed, 11 insertions(+), 26 deletions(-)
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 7498f2cebbfe..a96a3be77f12 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -309,6 +309,16 @@ struct net *get_net_ns_by_id(const struct net *net, int id)
}
EXPORT_SYMBOL_GPL(get_net_ns_by_id);
+static __net_init void preinit_net_sysctl(struct net *net)
+{
+ net->core.sysctl_somaxconn = SOMAXCONN;
+ /* Limits per socket sk_omem_alloc usage.
+ * TCP zerocopy regular usage needs 128 KB.
+ */
+ net->core.sysctl_optmem_max = 128 * 1024;
+ net->core.sysctl_txrehash = SOCK_TXREHASH_ENABLED;
+}
+
/* init code that must occur even if setup_net() is not called. */
static __net_init void preinit_net(struct net *net, struct user_namespace *user_ns)
{
@@ -324,6 +334,7 @@ static __net_init void preinit_net(struct net *net, struct user_namespace *user_
idr_init(&net->netns_ids);
spin_lock_init(&net->nsid_lock);
mutex_init(&net->ipv4.ra_mutex);
+ preinit_net_sysctl(net);
}
/*
@@ -384,32 +395,6 @@ static __net_init int setup_net(struct net *net)
goto out;
}
-static int __net_init net_defaults_init_net(struct net *net)
-{
- net->core.sysctl_somaxconn = SOMAXCONN;
- /* Limits per socket sk_omem_alloc usage.
- * TCP zerocopy regular usage needs 128 KB.
- */
- net->core.sysctl_optmem_max = 128 * 1024;
- net->core.sysctl_txrehash = SOCK_TXREHASH_ENABLED;
-
- return 0;
-}
-
-static struct pernet_operations net_defaults_ops = {
- .init = net_defaults_init_net,
-};
-
-static __init int net_defaults_init(void)
-{
- if (register_pernet_subsys(&net_defaults_ops))
- panic("Cannot initialize net default settings");
-
- return 0;
-}
-
-core_initcall(net_defaults_init);
-
#ifdef CONFIG_NET_NS
static struct ucounts *inc_net_namespaces(struct user_namespace *ns)
{
--
2.30.2
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