diff mbox series

[net-next,3/3] net-timestamp: namespacify the sysctl_tstamp_allow_data

Message ID 20240930092416.80830-4-kerneljasonxing@gmail.com (mailing list archive)
State New
Headers show
Series net-timestamp: add some trivial | expand

Commit Message

Jason Xing Sept. 30, 2024, 9:24 a.m. UTC 
From: Jason Xing <kernelxing@tencent.com>

Let it be tuned in per netns by admins.

Signed-off-by: Jason Xing <kernelxing@tencent.com>
---
 include/net/netns/core.h   |  1 +
 include/net/sock.h         |  2 --
 net/core/net_namespace.c   |  1 +
 net/core/skbuff.c          |  2 +-
 net/core/sysctl_net_core.c | 18 +++++++++---------
 5 files changed, 12 insertions(+), 12 deletions(-)

Comments

Willem de Bruijn Sept. 30, 2024, 10:47 a.m. UTC | #1 
Jason Xing wrote:
> From: Jason Xing <kernelxing@tencent.com>
> 
> Let it be tuned in per netns by admins.
> 
> Signed-off-by: Jason Xing <kernelxing@tencent.com>

+1 on the idea

> ---
>  include/net/netns/core.h   |  1 +
>  include/net/sock.h         |  2 --

also remove the static global from sock.c

>  net/core/net_namespace.c   |  1 +
>  net/core/skbuff.c          |  2 +-
>  net/core/sysctl_net_core.c | 18 +++++++++---------
>  5 files changed, 12 insertions(+), 12 deletions(-)
> 
> diff --git a/include/net/netns/core.h b/include/net/netns/core.h
> index 78214f1b43a2..ef8b3105c632 100644
> --- a/include/net/netns/core.h
> +++ b/include/net/netns/core.h
> @@ -23,6 +23,7 @@ struct netns_core {
>  #if IS_ENABLED(CONFIG_RPS) && IS_ENABLED(CONFIG_SYSCTL)
>  	struct cpumask *rps_default_mask;
>  #endif
> +	int	sysctl_tstamp_allow_data;
>  };
>  
>  #endif
> diff --git a/include/net/sock.h b/include/net/sock.h
> index c58ca8dd561b..4f31be0fd671 100644
> --- a/include/net/sock.h
> +++ b/include/net/sock.h
> @@ -2808,8 +2808,6 @@ void sk_get_meminfo(const struct sock *sk, u32 *meminfo);
>  extern __u32 sysctl_wmem_max;
>  extern __u32 sysctl_rmem_max;
>  
> -extern int sysctl_tstamp_allow_data;
> -
>  extern __u32 sysctl_wmem_default;
>  extern __u32 sysctl_rmem_default;
>  
> diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
> index e39479f1c9a4..e78c01912c64 100644
> --- a/net/core/net_namespace.c
> +++ b/net/core/net_namespace.c
> @@ -317,6 +317,7 @@ static __net_init void preinit_net_sysctl(struct net *net)
>  	 */
>  	net->core.sysctl_optmem_max = 128 * 1024;
>  	net->core.sysctl_txrehash = SOCK_TXREHASH_ENABLED;
> +	net->core.sysctl_tstamp_allow_data = 1;
>  }
>  
>  /* init code that must occur even if setup_net() is not called. */
> diff --git a/net/core/skbuff.c b/net/core/skbuff.c
> index 74149dc4ee31..ad727d924f73 100644
> --- a/net/core/skbuff.c
> +++ b/net/core/skbuff.c
> @@ -5506,7 +5506,7 @@ static bool skb_may_tx_timestamp(struct sock *sk, bool tsonly)
>  {
>  	bool ret;
>  
> -	if (likely(READ_ONCE(sysctl_tstamp_allow_data) || tsonly))
> +	if (likely(READ_ONCE(sock_net(sk)->core.sysctl_tstamp_allow_data) || tsonly))
>  		return true;

Let's switch order of the tests here too
Jason Xing Sept. 30, 2024, 11:14 a.m. UTC | #2 
On Mon, Sep 30, 2024 at 6:47 PM Willem de Bruijn
<willemdebruijn.kernel@gmail.com> wrote:
>
> Jason Xing wrote:
> > From: Jason Xing <kernelxing@tencent.com>
> >
> > Let it be tuned in per netns by admins.
> >
> > Signed-off-by: Jason Xing <kernelxing@tencent.com>
>
> +1 on the idea
>
> > ---
> >  include/net/netns/core.h   |  1 +
> >  include/net/sock.h         |  2 --
>
> also remove the static global from sock.c

Thanks for pointing this out.

>
> >  net/core/net_namespace.c   |  1 +
> >  net/core/skbuff.c          |  2 +-
> >  net/core/sysctl_net_core.c | 18 +++++++++---------
> >  5 files changed, 12 insertions(+), 12 deletions(-)
> >
> > diff --git a/include/net/netns/core.h b/include/net/netns/core.h
> > index 78214f1b43a2..ef8b3105c632 100644
> > --- a/include/net/netns/core.h
> > +++ b/include/net/netns/core.h
> > @@ -23,6 +23,7 @@ struct netns_core {
> >  #if IS_ENABLED(CONFIG_RPS) && IS_ENABLED(CONFIG_SYSCTL)
> >       struct cpumask *rps_default_mask;
> >  #endif
> > +     int     sysctl_tstamp_allow_data;
> >  };
> >
> >  #endif
> > diff --git a/include/net/sock.h b/include/net/sock.h
> > index c58ca8dd561b..4f31be0fd671 100644
> > --- a/include/net/sock.h
> > +++ b/include/net/sock.h
> > @@ -2808,8 +2808,6 @@ void sk_get_meminfo(const struct sock *sk, u32 *meminfo);
> >  extern __u32 sysctl_wmem_max;
> >  extern __u32 sysctl_rmem_max;
> >
> > -extern int sysctl_tstamp_allow_data;
> > -
> >  extern __u32 sysctl_wmem_default;
> >  extern __u32 sysctl_rmem_default;
> >
> > diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
> > index e39479f1c9a4..e78c01912c64 100644
> > --- a/net/core/net_namespace.c
> > +++ b/net/core/net_namespace.c
> > @@ -317,6 +317,7 @@ static __net_init void preinit_net_sysctl(struct net *net)
> >        */
> >       net->core.sysctl_optmem_max = 128 * 1024;
> >       net->core.sysctl_txrehash = SOCK_TXREHASH_ENABLED;
> > +     net->core.sysctl_tstamp_allow_data = 1;
> >  }
> >
> >  /* init code that must occur even if setup_net() is not called. */
> > diff --git a/net/core/skbuff.c b/net/core/skbuff.c
> > index 74149dc4ee31..ad727d924f73 100644
> > --- a/net/core/skbuff.c
> > +++ b/net/core/skbuff.c
> > @@ -5506,7 +5506,7 @@ static bool skb_may_tx_timestamp(struct sock *sk, bool tsonly)
> >  {
> >       bool ret;
> >
> > -     if (likely(READ_ONCE(sysctl_tstamp_allow_data) || tsonly))
> > +     if (likely(READ_ONCE(sock_net(sk)->core.sysctl_tstamp_allow_data) || tsonly))
> >               return true;
>
> Let's switch order of the tests here too

Got it. Will do it.

Thanks,
Jason
diff mbox series

Patch

diff --git a/include/net/netns/core.h b/include/net/netns/core.h
index 78214f1b43a2..ef8b3105c632 100644
--- a/include/net/netns/core.h
+++ b/include/net/netns/core.h
@@ -23,6 +23,7 @@  struct netns_core {
 #if IS_ENABLED(CONFIG_RPS) && IS_ENABLED(CONFIG_SYSCTL)
 	struct cpumask *rps_default_mask;
 #endif
+	int	sysctl_tstamp_allow_data;
 };
 
 #endif
diff --git a/include/net/sock.h b/include/net/sock.h
index c58ca8dd561b..4f31be0fd671 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -2808,8 +2808,6 @@  void sk_get_meminfo(const struct sock *sk, u32 *meminfo);
 extern __u32 sysctl_wmem_max;
 extern __u32 sysctl_rmem_max;
 
-extern int sysctl_tstamp_allow_data;
-
 extern __u32 sysctl_wmem_default;
 extern __u32 sysctl_rmem_default;
 
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index e39479f1c9a4..e78c01912c64 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -317,6 +317,7 @@  static __net_init void preinit_net_sysctl(struct net *net)
 	 */
 	net->core.sysctl_optmem_max = 128 * 1024;
 	net->core.sysctl_txrehash = SOCK_TXREHASH_ENABLED;
+	net->core.sysctl_tstamp_allow_data = 1;
 }
 
 /* init code that must occur even if setup_net() is not called. */
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 74149dc4ee31..ad727d924f73 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -5506,7 +5506,7 @@  static bool skb_may_tx_timestamp(struct sock *sk, bool tsonly)
 {
 	bool ret;
 
-	if (likely(READ_ONCE(sysctl_tstamp_allow_data) || tsonly))
+	if (likely(READ_ONCE(sock_net(sk)->core.sysctl_tstamp_allow_data) || tsonly))
 		return true;
 
 	read_lock_bh(&sk->sk_callback_lock);
diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
index 86a2476678c4..83622799eb80 100644
--- a/net/core/sysctl_net_core.c
+++ b/net/core/sysctl_net_core.c
@@ -491,15 +491,6 @@  static struct ctl_table net_core_table[] = {
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec,
 	},
-	{
-		.procname	= "tstamp_allow_data",
-		.data		= &sysctl_tstamp_allow_data,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= proc_dointvec_minmax,
-		.extra1		= SYSCTL_ZERO,
-		.extra2		= SYSCTL_ONE
-	},
 #ifdef CONFIG_RPS
 	{
 		.procname	= "rps_sock_flow_entries",
@@ -665,6 +656,15 @@  static struct ctl_table netns_core_table[] = {
 		.extra2		= SYSCTL_ONE,
 		.proc_handler	= proc_dou8vec_minmax,
 	},
+	{
+		.procname	= "tstamp_allow_data",
+		.data		= &init_net.core.sysctl_tstamp_allow_data,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_minmax,
+		.extra1		= SYSCTL_ZERO,
+		.extra2		= SYSCTL_ONE
+	},
 	/* sysctl_core_net_init() will set the values after this
 	 * to readonly in network namespaces
 	 */