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Date: Sun, 17 Jan 2021 17:52:28 +0800 From: menglong8.dong@...il.com To: kuba@...nel.org Cc: davem@...emloft.net, viro@...iv.linux.org.uk, rdna@...com, nicolas.dichtel@...nd.com, maheshb@...gle.com, keescook@...omium.org, dong.menglong@....com.cn, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH net-next] net: core: init every ctl_table in netns_core_table From: Menglong Dong <dong.menglong@....com.cn> For now, there is only one element in netns_core_table, and it is inited directly in sysctl_core_net_init. To make it more flexible, we can init every element at once, just like what ipv4_sysctl_init_net() did. Signed-off-by: Menglong Dong <dong.menglong@....com.cn> --- net/core/sysctl_net_core.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c index d86d8d11cfe4..966d976dee84 100644 --- a/net/core/sysctl_net_core.c +++ b/net/core/sysctl_net_core.c @@ -606,15 +606,19 @@ static __net_init int sysctl_core_net_init(struct net *net) tbl = netns_core_table; if (!net_eq(net, &init_net)) { + int i; + tbl = kmemdup(tbl, sizeof(netns_core_table), GFP_KERNEL); if (tbl == NULL) goto err_dup; - tbl[0].data = &net->core.sysctl_somaxconn; + /* Update the variables to point into the current struct net */ + for (i = 0; i < ARRAY_SIZE(netns_core_table) - 1; i++) { + tbl[i].data += (void *)net - (void *)&init_net; - /* Don't export any sysctls to unprivileged users */ - if (net->user_ns != &init_user_ns) { - tbl[0].procname = NULL; + /* Don't export any sysctls to unprivileged users */ + if (net->user_ns != &init_user_ns) + tbl[i].procname = NULL; } } -- 2.30.0
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