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Message-Id: <1332320185-27157-5-git-send-email-horms@verge.net.au>
Date: Wed, 21 Mar 2012 17:56:19 +0900
From: Simon Horman <horms@...ge.net.au>
To: Pablo Neira Ayuso <pablo@...filter.org>
Cc: lvs-devel@...r.kernel.org, netdev@...r.kernel.org,
netfilter-devel@...r.kernel.org,
Wensong Zhang <wensong@...ux-vs.org>,
Julian Anastasov <ja@....bg>, Simon Horman <horms@...ge.net.au>
Subject: [PATCH 4/9] ipvs: always update some of the flags bits in backup
From: Julian Anastasov <ja@....bg>
As the goal is to mirror the inactconns/activeconns
counters in the backup server, make sure the cp->flags are
updated even if cp is still not bound to dest. If cp->flags
are not updated ip_vs_bind_dest will rely only on the initial
flags when updating the counters. To avoid mistakes and
complicated checks for protocol state rely only on the
IP_VS_CONN_F_INACTIVE bit when updating the counters.
Signed-off-by: Julian Anastasov <ja@....bg>
Tested-by: Aleksey Chudov <aleksey.chudov@...il.com>
Signed-off-by: Simon Horman <horms@...ge.net.au>
---
include/linux/ip_vs.h | 5 +++
net/netfilter/ipvs/ip_vs_sync.c | 65 ++++++++++++++-------------------------
2 files changed, 28 insertions(+), 42 deletions(-)
diff --git a/include/linux/ip_vs.h b/include/linux/ip_vs.h
index 4deb383..ac31ef2 100644
--- a/include/linux/ip_vs.h
+++ b/include/linux/ip_vs.h
@@ -89,6 +89,7 @@
#define IP_VS_CONN_F_TEMPLATE 0x1000 /* template, not connection */
#define IP_VS_CONN_F_ONE_PACKET 0x2000 /* forward only one packet */
+/* Initial bits allowed in backup server */
#define IP_VS_CONN_F_BACKUP_MASK (IP_VS_CONN_F_FWD_MASK | \
IP_VS_CONN_F_NOOUTPUT | \
IP_VS_CONN_F_INACTIVE | \
@@ -97,6 +98,10 @@
IP_VS_CONN_F_TEMPLATE \
)
+/* Bits allowed to update in backup server */
+#define IP_VS_CONN_F_BACKUP_UPD_MASK (IP_VS_CONN_F_INACTIVE | \
+ IP_VS_CONN_F_SEQ_MASK)
+
/* Flags that are not sent to backup server start from bit 16 */
#define IP_VS_CONN_F_NFCT (1 << 16) /* use netfilter conntrack */
diff --git a/net/netfilter/ipvs/ip_vs_sync.c b/net/netfilter/ipvs/ip_vs_sync.c
index 8a0d6d6..0e36679 100644
--- a/net/netfilter/ipvs/ip_vs_sync.c
+++ b/net/netfilter/ipvs/ip_vs_sync.c
@@ -731,9 +731,30 @@ static void ip_vs_proc_conn(struct net *net, struct ip_vs_conn_param *param,
else
cp = ip_vs_ct_in_get(param);
- if (cp && param->pe_data) /* Free pe_data */
+ if (cp) {
+ /* Free pe_data */
kfree(param->pe_data);
- if (!cp) {
+
+ dest = cp->dest;
+ if ((cp->flags ^ flags) & IP_VS_CONN_F_INACTIVE &&
+ !(flags & IP_VS_CONN_F_TEMPLATE) && dest) {
+ if (flags & IP_VS_CONN_F_INACTIVE) {
+ atomic_dec(&dest->activeconns);
+ atomic_inc(&dest->inactconns);
+ } else {
+ atomic_inc(&dest->activeconns);
+ atomic_dec(&dest->inactconns);
+ }
+ }
+ flags &= IP_VS_CONN_F_BACKUP_UPD_MASK;
+ flags |= cp->flags & ~IP_VS_CONN_F_BACKUP_UPD_MASK;
+ cp->flags = flags;
+ if (!dest) {
+ dest = ip_vs_try_bind_dest(cp);
+ if (dest)
+ atomic_dec(&dest->refcnt);
+ }
+ } else {
/*
* Find the appropriate destination for the connection.
* If it is not found the connection will remain unbound
@@ -742,18 +763,6 @@ static void ip_vs_proc_conn(struct net *net, struct ip_vs_conn_param *param,
dest = ip_vs_find_dest(net, type, daddr, dport, param->vaddr,
param->vport, protocol, fwmark, flags);
- /* Set the approprite ativity flag */
- if (protocol == IPPROTO_TCP) {
- if (state != IP_VS_TCP_S_ESTABLISHED)
- flags |= IP_VS_CONN_F_INACTIVE;
- else
- flags &= ~IP_VS_CONN_F_INACTIVE;
- } else if (protocol == IPPROTO_SCTP) {
- if (state != IP_VS_SCTP_S_ESTABLISHED)
- flags |= IP_VS_CONN_F_INACTIVE;
- else
- flags &= ~IP_VS_CONN_F_INACTIVE;
- }
cp = ip_vs_conn_new(param, daddr, dport, flags, dest, fwmark);
if (dest)
atomic_dec(&dest->refcnt);
@@ -763,34 +772,6 @@ static void ip_vs_proc_conn(struct net *net, struct ip_vs_conn_param *param,
IP_VS_DBG(2, "BACKUP, add new conn. failed\n");
return;
}
- } else if (!cp->dest) {
- dest = ip_vs_try_bind_dest(cp);
- if (dest)
- atomic_dec(&dest->refcnt);
- } else if ((cp->dest) && (cp->protocol == IPPROTO_TCP) &&
- (cp->state != state)) {
- /* update active/inactive flag for the connection */
- dest = cp->dest;
- if (!(cp->flags & IP_VS_CONN_F_INACTIVE) &&
- (state != IP_VS_TCP_S_ESTABLISHED)) {
- atomic_dec(&dest->activeconns);
- atomic_inc(&dest->inactconns);
- cp->flags |= IP_VS_CONN_F_INACTIVE;
- } else if ((cp->flags & IP_VS_CONN_F_INACTIVE) &&
- (state == IP_VS_TCP_S_ESTABLISHED)) {
- atomic_inc(&dest->activeconns);
- atomic_dec(&dest->inactconns);
- cp->flags &= ~IP_VS_CONN_F_INACTIVE;
- }
- } else if ((cp->dest) && (cp->protocol == IPPROTO_SCTP) &&
- (cp->state != state)) {
- dest = cp->dest;
- if (!(cp->flags & IP_VS_CONN_F_INACTIVE) &&
- (state != IP_VS_SCTP_S_ESTABLISHED)) {
- atomic_dec(&dest->activeconns);
- atomic_inc(&dest->inactconns);
- cp->flags &= ~IP_VS_CONN_F_INACTIVE;
- }
}
if (opt)
--
1.7.6.3
--
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