netns xfrm: per-netns sysctls
Make
net.core.xfrm_aevent_etime
net.core.xfrm_acq_expires
net.core.xfrm_aevent_rseqth
net.core.xfrm_larval_drop
sysctls per-netns.
For that make net_core_path[] global, register it to prevent two
/proc/net/core antries and change initcall position -- xfrm_init() is called
from fs_initcall, so this one should be fs_initcall at least.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/xfrm/xfrm_sysctl.c b/net/xfrm/xfrm_sysctl.c
new file mode 100644
index 0000000..2e6ffb6
--- /dev/null
+++ b/net/xfrm/xfrm_sysctl.c
@@ -0,0 +1,85 @@
+#include <linux/sysctl.h>
+#include <net/net_namespace.h>
+#include <net/xfrm.h>
+
+static void __xfrm_sysctl_init(struct net *net)
+{
+ net->xfrm.sysctl_aevent_etime = XFRM_AE_ETIME;
+ net->xfrm.sysctl_aevent_rseqth = XFRM_AE_SEQT_SIZE;
+ net->xfrm.sysctl_larval_drop = 1;
+ net->xfrm.sysctl_acq_expires = 30;
+}
+
+#ifdef CONFIG_SYSCTL
+static struct ctl_table xfrm_table[] = {
+ {
+ .ctl_name = NET_CORE_AEVENT_ETIME,
+ .procname = "xfrm_aevent_etime",
+ .maxlen = sizeof(u32),
+ .mode = 0644,
+ .proc_handler = proc_dointvec
+ },
+ {
+ .ctl_name = NET_CORE_AEVENT_RSEQTH,
+ .procname = "xfrm_aevent_rseqth",
+ .maxlen = sizeof(u32),
+ .mode = 0644,
+ .proc_handler = proc_dointvec
+ },
+ {
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "xfrm_larval_drop",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec
+ },
+ {
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "xfrm_acq_expires",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec
+ },
+ {}
+};
+
+int __net_init xfrm_sysctl_init(struct net *net)
+{
+ struct ctl_table *table;
+
+ __xfrm_sysctl_init(net);
+
+ table = kmemdup(xfrm_table, sizeof(xfrm_table), GFP_KERNEL);
+ if (!table)
+ goto out_kmemdup;
+ table[0].data = &net->xfrm.sysctl_aevent_etime;
+ table[1].data = &net->xfrm.sysctl_aevent_rseqth;
+ table[2].data = &net->xfrm.sysctl_larval_drop;
+ table[3].data = &net->xfrm.sysctl_acq_expires;
+
+ net->xfrm.sysctl_hdr = register_net_sysctl_table(net, net_core_path, table);
+ if (!net->xfrm.sysctl_hdr)
+ goto out_register;
+ return 0;
+
+out_register:
+ kfree(table);
+out_kmemdup:
+ return -ENOMEM;
+}
+
+void xfrm_sysctl_fini(struct net *net)
+{
+ struct ctl_table *table;
+
+ table = net->xfrm.sysctl_hdr->ctl_table_arg;
+ unregister_net_sysctl_table(net->xfrm.sysctl_hdr);
+ kfree(table);
+}
+#else
+int __net_init xfrm_sysctl_init(struct net *net)
+{
+ __xfrm_sysctl_init(net);
+ return 0;
+}
+#endif