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ipvs: reorganize tot_stats 

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@ssi.bg>
Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
This commit is contained in:
Julian Anastasov 2011-03-04 12:20:35 +02:00 committed by Simon Horman
parent 2553d064ff
commit 2a0751af09
4 changed files with 29 additions and 28 deletions
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3
include/net/ip_vs.h
View File

@ -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 */

6
net/netfilter/ipvs/ip_vs_core.c
View File

@ -132,7 +132,7 @@ ip_vs_in_stats(struct ip_vs_conn *cp, struct sk_buff *skb)
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, struct sk_buff *skb)
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, struct ip_vs_service *svc)
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++;
}

45
net/netfilter/ipvs/ip_vs_ctl.c
View File

@ -1481,7 +1481,7 @@ static int ip_vs_zero_all(struct net *net)
}
}
ip_vs_zero_stats(net_ipvs(net)->tot_stats);
ip_vs_zero_stats(&net_ipvs(net)->tot_stats);
return 0;
}
@ -1963,7 +1963,7 @@ static const struct file_operations ip_vs_info_fops = {
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,
@ -2007,7 +2007,8 @@ static const struct file_operations ip_vs_stats_fops = {
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 */
@ -2017,11 +2018,20 @@ static int ip_vs_stats_percpu_show(struct seq_file *seq, void *v)
"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);
@ -3505,17 +3515,12 @@ int __net_init __ip_vs_control_init(struct net *net)
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);
@ -3563,7 +3568,7 @@ int __net_init __ip_vs_control_init(struct net *net)
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);
@ -3571,9 +3576,8 @@ int __net_init __ip_vs_control_init(struct net *net)
return 0;
err_dup:
free_percpu(ipvs->cpustats);
free_percpu(ipvs->tot_stats.cpustats);
err_alloc:
kfree(ipvs->tot_stats);
return -ENOMEM;
}
@ -3582,7 +3586,7 @@ static void __net_exit __ip_vs_control_cleanup(struct net *net)
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
@ -3591,8 +3595,7 @@ 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");
free_percpu(ipvs->cpustats);
kfree(ipvs->tot_stats);
free_percpu(ipvs->tot_stats.cpustats);
}
static struct pernet_operations ipvs_control_ops = {

3
net/netfilter/ipvs/ip_vs_est.c
View File

@ -101,13 +101,12 @@ static void estimation_timer(unsigned long arg)
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;