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IPVS: netns, defense work timer.

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This patch makes defense work timer per name-space,
A net ptr had to be added to the ipvs struct,
since it's needed by defense_work_handler.

[ horms@verge.net.au: Use cancel_delayed_work_sync() instead of
	              cancel_rearming_delayed_work(). Found during
		      merge conflict resoliution ]
Signed-off-by: Hans Schillstrom <hans.schillstrom@ericsson.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
This commit is contained in:
Hans Schillstrom 2011-01-03 14:44:59 +01:00 committed by Simon Horman
parent a0840e2e16
commit f6340ee0c6
5 changed files with 17 additions and 14 deletions
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2
include/net/ip_vs.h
View File

@ -877,7 +877,7 @@ extern const char * ip_vs_state_name(__u16 proto, int state);
extern void ip_vs_tcp_conn_listen(struct net *net, struct ip_vs_conn *cp);
extern int ip_vs_check_template(struct ip_vs_conn *ct);
extern void ip_vs_random_dropentry(void);
extern void ip_vs_random_dropentry(struct net *net);
extern int ip_vs_conn_init(void);
extern void ip_vs_conn_cleanup(void);

3
include/net/netns/ip_vs.h
View File

@ -71,6 +71,7 @@ struct netns_ipvs {
int num_services; /* no of virtual services */
/* 1/rate drop and drop-entry variables */
struct delayed_work defense_work; /* Work handler */
int drop_rate;
int drop_counter;
atomic_t dropentry;
@ -129,6 +130,8 @@ struct netns_ipvs {
/* multicast interface name */
char master_mcast_ifn[IP_VS_IFNAME_MAXLEN];
char backup_mcast_ifn[IP_VS_IFNAME_MAXLEN];
/* net name space ptr */
struct net *net; /* Needed by timer routines */
};
#endif /* IP_VS_H_ */

5
net/netfilter/ipvs/ip_vs_conn.c
View File

@ -1138,7 +1138,7 @@ static inline int todrop_entry(struct ip_vs_conn *cp)
}
/* Called from keventd and must protect itself from softirqs */
void ip_vs_random_dropentry(void)
void ip_vs_random_dropentry(struct net *net)
{
int idx;
struct ip_vs_conn *cp;
@ -1158,7 +1158,8 @@ void ip_vs_random_dropentry(void)
if (cp->flags & IP_VS_CONN_F_TEMPLATE)
/* connection template */
continue;
if (!ip_vs_conn_net_eq(cp, net))
continue;
if (cp->protocol == IPPROTO_TCP) {
switch(cp->state) {
case IP_VS_TCP_S_SYN_RECV:

1
net/netfilter/ipvs/ip_vs_core.c
View File

@ -1884,6 +1884,7 @@ static int __net_init __ip_vs_init(struct net *net)
pr_err("%s(): no memory.\n", __func__);
return -ENOMEM;
}
ipvs->net = net;
/* Counters used for creating unique names */
ipvs->gen = atomic_read(&ipvs_netns_cnt);
atomic_inc(&ipvs_netns_cnt);

20
net/netfilter/ipvs/ip_vs_ctl.c
View File

@ -217,18 +217,16 @@ static void update_defense_level(struct netns_ipvs *ipvs)
* Timer for checking the defense
*/
#define DEFENSE_TIMER_PERIOD 1*HZ
static void defense_work_handler(struct work_struct *work);
static DECLARE_DELAYED_WORK(defense_work, defense_work_handler);
static void defense_work_handler(struct work_struct *work)
{
struct netns_ipvs *ipvs = net_ipvs(&init_net);
struct netns_ipvs *ipvs =
container_of(work, struct netns_ipvs, defense_work.work);
update_defense_level(ipvs);
if (atomic_read(&ipvs->dropentry))
ip_vs_random_dropentry();
schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD);
ip_vs_random_dropentry(ipvs->net);
schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
}
int
@ -3564,6 +3562,9 @@ int __net_init __ip_vs_control_init(struct net *net)
goto err_reg;
ip_vs_new_estimator(net, ipvs->tot_stats);
ipvs->sysctl_tbl = tbl;
/* Schedule defense work */
INIT_DELAYED_WORK(&ipvs->defense_work, defense_work_handler);
schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
return 0;
err_reg:
@ -3588,6 +3589,8 @@ static void __net_exit __ip_vs_control_cleanup(struct net *net)
proc_net_remove(net, "ip_vs_stats_percpu");
proc_net_remove(net, "ip_vs_stats");
proc_net_remove(net, "ip_vs");
cancel_delayed_work_sync(&ipvs->defense_work);
cancel_work_sync(&ipvs->defense_work.work);
free_percpu(ipvs->cpustats);
kfree(ipvs->tot_stats);
}
@ -3631,9 +3634,6 @@ int __init ip_vs_control_init(void)
goto err_net;
}
/* Hook the defense timer */
schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD);
LeaveFunction(2);
return 0;
@ -3648,8 +3648,6 @@ void ip_vs_control_cleanup(void)
{
EnterFunction(2);
ip_vs_trash_cleanup();
cancel_delayed_work_sync(&defense_work);
cancel_work_sync(&defense_work.work);
unregister_pernet_subsys(&ipvs_control_ops);
ip_vs_genl_unregister();
nf_unregister_sockopt(&ip_vs_sockopts);