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Message-Id: <20180817193850.2796-4-pablo@netfilter.org>
Date: Fri, 17 Aug 2018 21:38:38 +0200
From: Pablo Neira Ayuso <pablo@...filter.org>
To: netfilter-devel@...r.kernel.org
Cc: davem@...emloft.net, netdev@...r.kernel.org
Subject: [PATCH 03/15] ipvs: don't show negative times in ip_vs_conn
From: Matteo Croce <mcroce@...hat.com>
Since commit 500462a9de65 ("timers: Switch to a non-cascading wheel"),
timers duration can last even 12.5% more than the scheduled interval.
IPVS has two handlers, /proc/net/ip_vs_conn and /proc/net/ip_vs_conn_sync,
which shows the remaining time before that a connection expires.
The default expire time for a connection is 60 seconds, and the
expiration timer can fire even 4 seconds later than the scheduled time.
The expiration time is calculated subtracting jiffies to the scheduled
expiration time, and it's shown as a huge number when the timer fires late,
since both values are unsigned.
This can confuse script and tools which relies on it, like ipvsadm:
root@...oce-redhat:~# while ipvsadm -lc |grep SYN_RECV; do sleep 1 ; done
TCP 00:05 SYN_RECV [fc00:1::1]:55732 [fc00:1::2]:8000 [fc00:2000::1]:8000
TCP 00:04 SYN_RECV [fc00:1::1]:55732 [fc00:1::2]:8000 [fc00:2000::1]:8000
TCP 00:03 SYN_RECV [fc00:1::1]:55732 [fc00:1::2]:8000 [fc00:2000::1]:8000
TCP 00:02 SYN_RECV [fc00:1::1]:55732 [fc00:1::2]:8000 [fc00:2000::1]:8000
TCP 00:01 SYN_RECV [fc00:1::1]:55732 [fc00:1::2]:8000 [fc00:2000::1]:8000
TCP 00:00 SYN_RECV [fc00:1::1]:55732 [fc00:1::2]:8000 [fc00:2000::1]:8000
TCP 68719476:44 SYN_RECV [fc00:1::1]:55732 [fc00:1::2]:8000 [fc00:2000::1]:8000
TCP 68719476:43 SYN_RECV [fc00:1::1]:55732 [fc00:1::2]:8000 [fc00:2000::1]:8000
TCP 68719476:42 SYN_RECV [fc00:1::1]:55732 [fc00:1::2]:8000 [fc00:2000::1]:8000
TCP 68719476:41 SYN_RECV [fc00:1::1]:55732 [fc00:1::2]:8000 [fc00:2000::1]:8000
TCP 68719476:40 SYN_RECV [fc00:1::1]:55732 [fc00:1::2]:8000 [fc00:2000::1]:8000
TCP 68719476:39 SYN_RECV [fc00:1::1]:55732 [fc00:1::2]:8000 [fc00:2000::1]:8000
Signed-off-by: Matteo Croce <mcroce@...hat.com>
Acked-by: Simon Horman <horms@...ge.net.au>
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
---
net/netfilter/ipvs/ip_vs_conn.c | 22 ++++++++++++++--------
1 file changed, 14 insertions(+), 8 deletions(-)
diff --git a/net/netfilter/ipvs/ip_vs_conn.c b/net/netfilter/ipvs/ip_vs_conn.c
index 0edc62910ebf..5b2b17867cb1 100644
--- a/net/netfilter/ipvs/ip_vs_conn.c
+++ b/net/netfilter/ipvs/ip_vs_conn.c
@@ -1117,24 +1117,28 @@ static int ip_vs_conn_seq_show(struct seq_file *seq, void *v)
#ifdef CONFIG_IP_VS_IPV6
if (cp->af == AF_INET6)
seq_printf(seq, "%-3s %pI6 %04X %pI6 %04X "
- "%s %04X %-11s %7lu%s\n",
+ "%s %04X %-11s %7u%s\n",
ip_vs_proto_name(cp->protocol),
&cp->caddr.in6, ntohs(cp->cport),
&cp->vaddr.in6, ntohs(cp->vport),
dbuf, ntohs(cp->dport),
ip_vs_state_name(cp),
- (cp->timer.expires-jiffies)/HZ, pe_data);
+ jiffies_delta_to_msecs(cp->timer.expires -
+ jiffies) / 1000,
+ pe_data);
else
#endif
seq_printf(seq,
"%-3s %08X %04X %08X %04X"
- " %s %04X %-11s %7lu%s\n",
+ " %s %04X %-11s %7u%s\n",
ip_vs_proto_name(cp->protocol),
ntohl(cp->caddr.ip), ntohs(cp->cport),
ntohl(cp->vaddr.ip), ntohs(cp->vport),
dbuf, ntohs(cp->dport),
ip_vs_state_name(cp),
- (cp->timer.expires-jiffies)/HZ, pe_data);
+ jiffies_delta_to_msecs(cp->timer.expires -
+ jiffies) / 1000,
+ pe_data);
}
return 0;
}
@@ -1179,26 +1183,28 @@ static int ip_vs_conn_sync_seq_show(struct seq_file *seq, void *v)
#ifdef CONFIG_IP_VS_IPV6
if (cp->af == AF_INET6)
seq_printf(seq, "%-3s %pI6 %04X %pI6 %04X "
- "%s %04X %-11s %-6s %7lu\n",
+ "%s %04X %-11s %-6s %7u\n",
ip_vs_proto_name(cp->protocol),
&cp->caddr.in6, ntohs(cp->cport),
&cp->vaddr.in6, ntohs(cp->vport),
dbuf, ntohs(cp->dport),
ip_vs_state_name(cp),
ip_vs_origin_name(cp->flags),
- (cp->timer.expires-jiffies)/HZ);
+ jiffies_delta_to_msecs(cp->timer.expires -
+ jiffies) / 1000);
else
#endif
seq_printf(seq,
"%-3s %08X %04X %08X %04X "
- "%s %04X %-11s %-6s %7lu\n",
+ "%s %04X %-11s %-6s %7u\n",
ip_vs_proto_name(cp->protocol),
ntohl(cp->caddr.ip), ntohs(cp->cport),
ntohl(cp->vaddr.ip), ntohs(cp->vport),
dbuf, ntohs(cp->dport),
ip_vs_state_name(cp),
ip_vs_origin_name(cp->flags),
- (cp->timer.expires-jiffies)/HZ);
+ jiffies_delta_to_msecs(cp->timer.expires -
+ jiffies) / 1000);
}
return 0;
}
--
2.11.0
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