From: Simon Horman <horms@verge.net.au>
To: netdev@vger.kernel.org, netfilter-devel@vger.kernel.org,
netfilter@vger.kernel.org, lvs-devel@vger.kernel.org
Cc: Eric Dumazet <eric.dumazet@gmail.com>,
Julian Anastasov <ja@ssi.bg>,
Hans Schillstrom <hans@schillstrom.com>,
Simon Horman <horms@verge.net.au>
Subject: [PATCH 03/20] ipvs: properly zero stats and rates
Date: Mon, 14 Mar 2011 12:45:29 +0900 [thread overview]
Message-ID: <1300074346-13799-4-git-send-email-horms@verge.net.au> (raw)
In-Reply-To: <1300074346-13799-1-git-send-email-horms@verge.net.au>
From: Julian Anastasov <ja@ssi.bg>
Currently, the new percpu counters are not zeroed and
the zero commands do not work as expected, we still show the old
sum of percpu values. OTOH, we can not reset the percpu counters
from user context without causing the incrementing to use old
and bogus values.
So, as Eric Dumazet suggested fix that by moving all overhead
to stats reading in user context. Do not introduce overhead in
timer context (estimator) and incrementing (packet handling in
softirqs).
The new ustats0 field holds the zero point for all
counter values, the rates always use 0 as base value as before.
When showing the values to user space just give the difference
between counters and the base values. The only drawback is that
percpu stats are not zeroed, they are accessible only from /proc
and are new interface, so it should not be a compatibility problem
as long as the sum stats are correct after zeroing.
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
---
include/net/ip_vs.h | 1 +
net/netfilter/ipvs/ip_vs_ctl.c | 96 +++++++++++++++++++++++++---------------
net/netfilter/ipvs/ip_vs_est.c | 15 +++---
3 files changed, 69 insertions(+), 43 deletions(-)
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index 9db750d..06f5af4 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -374,6 +374,7 @@ struct ip_vs_stats {
struct ip_vs_estimator est; /* estimator */
struct ip_vs_cpu_stats *cpustats; /* per cpu counters */
spinlock_t lock; /* spin lock */
+ struct ip_vs_stats_user ustats0; /* reset values */
};
/*
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index a2a67ad..804fee7 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -711,13 +711,51 @@ static void ip_vs_trash_cleanup(struct net *net)
}
}
+static void
+ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src)
+{
+#define IP_VS_SHOW_STATS_COUNTER(c) dst->c = src->ustats.c - src->ustats0.c
+#define IP_VS_SHOW_STATS_RATE(r) dst->r = src->ustats.r
+
+ spin_lock_bh(&src->lock);
+
+ IP_VS_SHOW_STATS_COUNTER(conns);
+ IP_VS_SHOW_STATS_COUNTER(inpkts);
+ IP_VS_SHOW_STATS_COUNTER(outpkts);
+ IP_VS_SHOW_STATS_COUNTER(inbytes);
+ IP_VS_SHOW_STATS_COUNTER(outbytes);
+
+ IP_VS_SHOW_STATS_RATE(cps);
+ IP_VS_SHOW_STATS_RATE(inpps);
+ IP_VS_SHOW_STATS_RATE(outpps);
+ IP_VS_SHOW_STATS_RATE(inbps);
+ IP_VS_SHOW_STATS_RATE(outbps);
+
+ spin_unlock_bh(&src->lock);
+}
static void
ip_vs_zero_stats(struct ip_vs_stats *stats)
{
spin_lock_bh(&stats->lock);
- memset(&stats->ustats, 0, sizeof(stats->ustats));
+ /* get current counters as zero point, rates are zeroed */
+
+#define IP_VS_ZERO_STATS_COUNTER(c) stats->ustats0.c = stats->ustats.c
+#define IP_VS_ZERO_STATS_RATE(r) stats->ustats.r = 0
+
+ IP_VS_ZERO_STATS_COUNTER(conns);
+ IP_VS_ZERO_STATS_COUNTER(inpkts);
+ IP_VS_ZERO_STATS_COUNTER(outpkts);
+ IP_VS_ZERO_STATS_COUNTER(inbytes);
+ IP_VS_ZERO_STATS_COUNTER(outbytes);
+
+ IP_VS_ZERO_STATS_RATE(cps);
+ IP_VS_ZERO_STATS_RATE(inpps);
+ IP_VS_ZERO_STATS_RATE(outpps);
+ IP_VS_ZERO_STATS_RATE(inbps);
+ IP_VS_ZERO_STATS_RATE(outbps);
+
ip_vs_zero_estimator(stats);
spin_unlock_bh(&stats->lock);
@@ -1963,7 +2001,7 @@ 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_user show;
/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
seq_puts(seq,
@@ -1971,22 +2009,18 @@ static int ip_vs_stats_show(struct seq_file *seq, void *v)
seq_printf(seq,
" Conns Packets Packets Bytes Bytes\n");
- spin_lock_bh(&tot_stats->lock);
- seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", tot_stats->ustats.conns,
- tot_stats->ustats.inpkts, tot_stats->ustats.outpkts,
- (unsigned long long) tot_stats->ustats.inbytes,
- (unsigned long long) tot_stats->ustats.outbytes);
+ ip_vs_copy_stats(&show, &net_ipvs(net)->tot_stats);
+ seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", show.conns,
+ show.inpkts, show.outpkts,
+ (unsigned long long) show.inbytes,
+ (unsigned long long) show.outbytes);
/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
seq_puts(seq,
" Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
- seq_printf(seq,"%8X %8X %8X %16X %16X\n",
- tot_stats->ustats.cps,
- tot_stats->ustats.inpps,
- tot_stats->ustats.outpps,
- tot_stats->ustats.inbps,
- tot_stats->ustats.outbps);
- spin_unlock_bh(&tot_stats->lock);
+ seq_printf(seq, "%8X %8X %8X %16X %16X\n",
+ show.cps, show.inpps, show.outpps,
+ show.inbps, show.outbps);
return 0;
}
@@ -2298,14 +2332,6 @@ do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
static void
-ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src)
-{
- spin_lock_bh(&src->lock);
- memcpy(dst, &src->ustats, sizeof(*dst));
- spin_unlock_bh(&src->lock);
-}
-
-static void
ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
{
dst->protocol = src->protocol;
@@ -2691,31 +2717,29 @@ static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
struct ip_vs_stats *stats)
{
+ struct ip_vs_stats_user ustats;
struct nlattr *nl_stats = nla_nest_start(skb, container_type);
if (!nl_stats)
return -EMSGSIZE;
- spin_lock_bh(&stats->lock);
-
- NLA_PUT_U32(skb, IPVS_STATS_ATTR_CONNS, stats->ustats.conns);
- NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPKTS, stats->ustats.inpkts);
- NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPKTS, stats->ustats.outpkts);
- NLA_PUT_U64(skb, IPVS_STATS_ATTR_INBYTES, stats->ustats.inbytes);
- NLA_PUT_U64(skb, IPVS_STATS_ATTR_OUTBYTES, stats->ustats.outbytes);
- NLA_PUT_U32(skb, IPVS_STATS_ATTR_CPS, stats->ustats.cps);
- NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPPS, stats->ustats.inpps);
- NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPPS, stats->ustats.outpps);
- NLA_PUT_U32(skb, IPVS_STATS_ATTR_INBPS, stats->ustats.inbps);
- NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTBPS, stats->ustats.outbps);
+ ip_vs_copy_stats(&ustats, stats);
- spin_unlock_bh(&stats->lock);
+ NLA_PUT_U32(skb, IPVS_STATS_ATTR_CONNS, ustats.conns);
+ NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPKTS, ustats.inpkts);
+ NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPKTS, ustats.outpkts);
+ NLA_PUT_U64(skb, IPVS_STATS_ATTR_INBYTES, ustats.inbytes);
+ NLA_PUT_U64(skb, IPVS_STATS_ATTR_OUTBYTES, ustats.outbytes);
+ NLA_PUT_U32(skb, IPVS_STATS_ATTR_CPS, ustats.cps);
+ NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPPS, ustats.inpps);
+ NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPPS, ustats.outpps);
+ NLA_PUT_U32(skb, IPVS_STATS_ATTR_INBPS, ustats.inbps);
+ NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTBPS, ustats.outbps);
nla_nest_end(skb, nl_stats);
return 0;
nla_put_failure:
- spin_unlock_bh(&stats->lock);
nla_nest_cancel(skb, nl_stats);
return -EMSGSIZE;
}
diff --git a/net/netfilter/ipvs/ip_vs_est.c b/net/netfilter/ipvs/ip_vs_est.c
index b3751cf..a850087 100644
--- a/net/netfilter/ipvs/ip_vs_est.c
+++ b/net/netfilter/ipvs/ip_vs_est.c
@@ -184,13 +184,14 @@ void ip_vs_kill_estimator(struct net *net, struct ip_vs_stats *stats)
void ip_vs_zero_estimator(struct ip_vs_stats *stats)
{
struct ip_vs_estimator *est = &stats->est;
-
- /* set counters zero, caller must hold the stats->lock lock */
- est->last_inbytes = 0;
- est->last_outbytes = 0;
- est->last_conns = 0;
- est->last_inpkts = 0;
- est->last_outpkts = 0;
+ struct ip_vs_stats_user *u = &stats->ustats;
+
+ /* reset counters, caller must hold the stats->lock lock */
+ est->last_inbytes = u->inbytes;
+ est->last_outbytes = u->outbytes;
+ est->last_conns = u->conns;
+ est->last_inpkts = u->inpkts;
+ est->last_outpkts = u->outpkts;
est->cps = 0;
est->inpps = 0;
est->outpps = 0;
--
1.7.2.3
next prev parent reply other threads:[~2011-03-14 3:45 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-14 3:45 [patch v3 00/20] IPVS: Proposed Changes Simon Horman
2011-03-14 3:45 ` [PATCH 01/20] ipvs: move struct netns_ipvs Simon Horman
2011-03-14 3:45 ` [PATCH 02/20] ipvs: reorganize tot_stats Simon Horman
2011-03-14 4:28 ` Eric Dumazet
2011-03-14 9:21 ` Julian Anastasov
2011-03-14 3:45 ` Simon Horman [this message]
2011-03-14 4:09 ` [PATCH 03/20] ipvs: properly zero stats and rates Eric Dumazet
2011-03-14 3:45 ` [PATCH 04/20] ipvs: remove unused seqcount stats Simon Horman
2011-03-14 3:45 ` [PATCH 05/20] ipvs: optimize rates reading Simon Horman
2011-03-14 3:45 ` [PATCH 06/20] ipvs: rename estimator functions Simon Horman
2011-03-14 3:45 ` [PATCH 07/20] IPVS: Add ip_vs_route_me_harder() Simon Horman
2011-03-14 3:45 ` [PATCH 08/20] IPVS: Add sysctl_snat_reroute() Simon Horman
2011-03-14 3:45 ` [PATCH 09/20] IPVS: Add sysctl_nat_icmp_send() Simon Horman
2011-03-14 3:45 ` [PATCH 10/20] IPVS: Add {sysctl_sync_threshold,period}() Simon Horman
2011-03-14 3:45 ` [PATCH 11/20] IPVS: Add sysctl_sync_ver() Simon Horman
2011-03-14 3:45 ` [PATCH 12/20] IPVS: Add sysctl_expire_nodest_conn() Simon Horman
2011-03-14 3:45 ` [PATCH 13/20] IPVS: Add expire_quiescent_template() Simon Horman
2011-03-14 3:45 ` [PATCH 14/20] IPVS: Conditinally use sysctl_lblc{r}_expiration Simon Horman
2011-03-14 3:45 ` [PATCH 15/20] IPVS: ip_vs_todrop() becomes a noop when CONFIG_SYSCTL is undefined Simon Horman
2011-03-14 3:45 ` [PATCH 16/20] IPVS: Conditional ip_vs_conntrack_enabled() Simon Horman
2011-03-14 3:45 ` [PATCH 17/20] IPVS: Minimise ip_vs_leave when CONFIG_SYSCTL is undefined Simon Horman
2011-03-14 3:45 ` [PATCH 18/20] IPVS: Conditionally define and use ip_vs_lblc{r}_table Simon Horman
2011-03-14 3:45 ` [PATCH 19/20] IPVS: Add __ip_vs_control_{init,cleanup}_sysctl() Simon Horman
2011-03-14 3:45 ` [PATCH 20/20] IPVS: Conditionally include sysctl members of struct netns_ipvs Simon Horman
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