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The global tot_stats contains cpustats field just like the
stats for dest and svc, so better use it to simplify the usage
in estimation_timer. As tot_stats is registered as estimator
we can remove the special ip_vs_read_cpu_stats call for
tot_stats. Fix ip_vs_read_cpu_stats to be called under
stats lock because it is still used as synchronization between
estimation timer and user context (the stats readers).
Also, make sure ip_vs_stats_percpu_show reads properly
the u64 stats from user context.
Signed-off-by: Julian Anastasov <ja@xxxxxx>
---
diff -urp lvs-test-2.6-8a80c79/linux/include/net/ip_vs.h
linux/include/net/ip_vs.h
--- lvs-test-2.6-8a80c79/linux/include/net/ip_vs.h 2011-03-03
22:51:05.000000000 +0200
+++ linux/include/net/ip_vs.h 2011-03-03 22:56:57.780378777 +0200
@@ -851,8 +851,7 @@ struct netns_ipvs {
atomic_t conn_count; /* connection counter */
/* ip_vs_ctl */
- struct ip_vs_stats *tot_stats; /* Statistics & est. */
- struct ip_vs_cpu_stats __percpu *cpustats; /* Stats per cpu */
+ struct ip_vs_stats tot_stats; /* Statistics & est. */
seqcount_t *ustats_seq; /* u64 read retry */
int num_services; /* no of virtual services */
diff -urp lvs-test-2.6-8a80c79/linux/net/netfilter/ipvs/ip_vs_core.c
linux/net/netfilter/ipvs/ip_vs_core.c
--- lvs-test-2.6-8a80c79/linux/net/netfilter/ipvs/ip_vs_core.c 2011-03-03
22:47:47.000000000 +0200
+++ linux/net/netfilter/ipvs/ip_vs_core.c 2011-03-03 22:56:57.782378981
+0200
@@ -132,7 +132,7 @@ ip_vs_in_stats(struct ip_vs_conn *cp, st
s->ustats.inbytes += skb->len;
u64_stats_update_end(&s->syncp);
- s = this_cpu_ptr(ipvs->cpustats);
+ s = this_cpu_ptr(ipvs->tot_stats.cpustats);
s->ustats.inpkts++;
u64_stats_update_begin(&s->syncp);
s->ustats.inbytes += skb->len;
@@ -162,7 +162,7 @@ ip_vs_out_stats(struct ip_vs_conn *cp, s
s->ustats.outbytes += skb->len;
u64_stats_update_end(&s->syncp);
- s = this_cpu_ptr(ipvs->cpustats);
+ s = this_cpu_ptr(ipvs->tot_stats.cpustats);
s->ustats.outpkts++;
u64_stats_update_begin(&s->syncp);
s->ustats.outbytes += skb->len;
@@ -183,7 +183,7 @@ ip_vs_conn_stats(struct ip_vs_conn *cp,
s = this_cpu_ptr(svc->stats.cpustats);
s->ustats.conns++;
- s = this_cpu_ptr(ipvs->cpustats);
+ s = this_cpu_ptr(ipvs->tot_stats.cpustats);
s->ustats.conns++;
}
diff -urp lvs-test-2.6-8a80c79/linux/net/netfilter/ipvs/ip_vs_ctl.c
linux/net/netfilter/ipvs/ip_vs_ctl.c
--- lvs-test-2.6-8a80c79/linux/net/netfilter/ipvs/ip_vs_ctl.c 2011-03-03
22:47:47.000000000 +0200
+++ linux/net/netfilter/ipvs/ip_vs_ctl.c 2011-03-03 23:04:33.089379951
+0200
@@ -1479,7 +1479,7 @@ static int ip_vs_zero_all(struct net *ne
}
}
- ip_vs_zero_stats(net_ipvs(net)->tot_stats);
+ ip_vs_zero_stats(&net_ipvs(net)->tot_stats);
return 0;
}
@@ -1961,7 +1961,7 @@ static const struct file_operations ip_v
static int ip_vs_stats_show(struct seq_file *seq, void *v)
{
struct net *net = seq_file_single_net(seq);
- struct ip_vs_stats *tot_stats = net_ipvs(net)->tot_stats;
+ struct ip_vs_stats *tot_stats = &net_ipvs(net)->tot_stats;
/* 01234567 01234567 01234567 0123456701234567 0123456701234567
*/
seq_puts(seq,
@@ -2005,7 +2005,8 @@ static const struct file_operations ip_v
static int ip_vs_stats_percpu_show(struct seq_file *seq, void *v)
{
struct net *net = seq_file_single_net(seq);
- struct ip_vs_stats *tot_stats = net_ipvs(net)->tot_stats;
+ struct ip_vs_stats *tot_stats = &net_ipvs(net)->tot_stats;
+ struct ip_vs_cpu_stats *cpustats = tot_stats->cpustats;
int i;
/* 01234567 01234567 01234567 0123456701234567 0123456701234567
*/
@@ -2015,11 +2016,20 @@ static int ip_vs_stats_percpu_show(struc
"CPU Conns Packets Packets Bytes
Bytes\n");
for_each_possible_cpu(i) {
- struct ip_vs_cpu_stats *u = per_cpu_ptr(net->ipvs->cpustats, i);
+ struct ip_vs_cpu_stats *u = per_cpu_ptr(cpustats, i);
+ unsigned int start;
+ __u64 inbytes, outbytes;
+
+ do {
+ start = u64_stats_fetch_begin_bh(&u->syncp);
+ inbytes = u->ustats.inbytes;
+ outbytes = u->ustats.outbytes;
+ } while (u64_stats_fetch_retry_bh(&u->syncp, start));
+
seq_printf(seq, "%3X %8X %8X %8X %16LX %16LX\n",
- i, u->ustats.conns, u->ustats.inpkts,
- u->ustats.outpkts, (__u64)u->ustats.inbytes,
- (__u64)u->ustats.outbytes);
+ i, u->ustats.conns, u->ustats.inpkts,
+ u->ustats.outpkts, (__u64)inbytes,
+ (__u64)outbytes);
}
spin_lock_bh(&tot_stats->lock);
@@ -3503,17 +3513,12 @@ int __net_init __ip_vs_control_init(stru
atomic_set(&ipvs->nullsvc_counter, 0);
/* procfs stats */
- ipvs->tot_stats = kzalloc(sizeof(struct ip_vs_stats), GFP_KERNEL);
- if (ipvs->tot_stats == NULL) {
- pr_err("%s(): no memory.\n", __func__);
- return -ENOMEM;
- }
- ipvs->cpustats = alloc_percpu(struct ip_vs_cpu_stats);
- if (!ipvs->cpustats) {
+ ipvs->tot_stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
+ if (!ipvs->tot_stats.cpustats) {
pr_err("%s() alloc_percpu failed\n", __func__);
goto err_alloc;
}
- spin_lock_init(&ipvs->tot_stats->lock);
+ spin_lock_init(&ipvs->tot_stats.lock);
proc_net_fops_create(net, "ip_vs", 0, &ip_vs_info_fops);
proc_net_fops_create(net, "ip_vs_stats", 0, &ip_vs_stats_fops);
@@ -3561,7 +3566,7 @@ int __net_init __ip_vs_control_init(stru
goto err_dup;
}
#endif
- ip_vs_new_estimator(net, ipvs->tot_stats);
+ ip_vs_new_estimator(net, &ipvs->tot_stats);
ipvs->sysctl_tbl = tbl;
/* Schedule defense work */
INIT_DELAYED_WORK(&ipvs->defense_work, defense_work_handler);
@@ -3569,9 +3574,8 @@ int __net_init __ip_vs_control_init(stru
return 0;
err_dup:
- free_percpu(ipvs->cpustats);
+ free_percpu(ipvs->tot_stats.cpustats);
err_alloc:
- kfree(ipvs->tot_stats);
return -ENOMEM;
}
@@ -3580,7 +3584,7 @@ static void __net_exit __ip_vs_control_c
struct netns_ipvs *ipvs = net_ipvs(net);
ip_vs_trash_cleanup(net);
- ip_vs_kill_estimator(net, ipvs->tot_stats);
+ ip_vs_kill_estimator(net, &ipvs->tot_stats);
cancel_delayed_work_sync(&ipvs->defense_work);
cancel_work_sync(&ipvs->defense_work.work);
#ifdef CONFIG_SYSCTL
@@ -3589,8 +3593,7 @@ static void __net_exit __ip_vs_control_c
proc_net_remove(net, "ip_vs_stats_percpu");
proc_net_remove(net, "ip_vs_stats");
proc_net_remove(net, "ip_vs");
- free_percpu(ipvs->cpustats);
- kfree(ipvs->tot_stats);
+ free_percpu(ipvs->tot_stats.cpustats);
}
static struct pernet_operations ipvs_control_ops = {
diff -urp lvs-test-2.6-8a80c79/linux/net/netfilter/ipvs/ip_vs_est.c
linux/net/netfilter/ipvs/ip_vs_est.c
--- lvs-test-2.6-8a80c79/linux/net/netfilter/ipvs/ip_vs_est.c 2011-03-03
22:47:47.000000000 +0200
+++ linux/net/netfilter/ipvs/ip_vs_est.c 2011-03-03 22:56:57.786378448
+0200
@@ -101,13 +101,12 @@ static void estimation_timer(unsigned lo
struct netns_ipvs *ipvs;
ipvs = net_ipvs(net);
- ip_vs_read_cpu_stats(&ipvs->tot_stats->ustats, ipvs->cpustats);
spin_lock(&ipvs->est_lock);
list_for_each_entry(e, &ipvs->est_list, list) {
s = container_of(e, struct ip_vs_stats, est);
- ip_vs_read_cpu_stats(&s->ustats, s->cpustats);
spin_lock(&s->lock);
+ ip_vs_read_cpu_stats(&s->ustats, s->cpustats);
n_conns = s->ustats.conns;
n_inpkts = s->ustats.inpkts;
n_outpkts = s->ustats.outpkts;
--
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