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net-timestamp: namespacify the sysctl_tstamp_allow_data

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Let it be tuned in per netns by admins.

Signed-off-by: Jason Xing <kernelxing@tencent.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20241005222609.94980-1-kerneljasonxing@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jason Xing 2024-10-06 07:26:09 +09:00 committed by Jakub Kicinski
parent ada5c3229b
commit da5e06dee5
6 changed files with 12 additions and 14 deletions
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1
include/net/netns/core.h
View File

@ -15,6 +15,7 @@ struct netns_core {
int sysctl_somaxconn;
int sysctl_optmem_max;
u8 sysctl_txrehash;
u8 sysctl_tstamp_allow_data;
#ifdef CONFIG_PROC_FS
struct prot_inuse __percpu *prot_inuse;

2
include/net/sock.h
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@ -2824,8 +2824,6 @@ 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;

1
net/core/net_namespace.c
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@ -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. */

2
net/core/skbuff.c
View File

@ -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(tsonly || READ_ONCE(sock_net(sk)->core.sysctl_tstamp_allow_data)))
return true;
read_lock_bh(&sk->sk_callback_lock);

2
net/core/sock.c
View File

@ -286,8 +286,6 @@ EXPORT_SYMBOL(sysctl_rmem_max);
__u32 sysctl_wmem_default __read_mostly = SK_WMEM_MAX;
__u32 sysctl_rmem_default __read_mostly = SK_RMEM_MAX;
int sysctl_tstamp_allow_data __read_mostly = 1;
DEFINE_STATIC_KEY_FALSE(memalloc_socks_key);
EXPORT_SYMBOL_GPL(memalloc_socks_key);

18
net/core/sysctl_net_core.c
View File

@ -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(u8),
.mode = 0644,
.proc_handler = proc_dou8vec_minmax,
.extra1 = SYSCTL_ZERO,
.extra2 = SYSCTL_ONE
},
/* sysctl_core_net_init() will set the values after this
* to readonly in network namespaces
*/