ipvs: sloppy TCP and SCTP
This adds support for sloppy TCP and SCTP modes to IPVS.
When enabled (sysctls net.ipv4.vs.sloppy_tcp and
net.ipv4.vs.sloppy_sctp), allows IPVS to create connection state on any
packet, not just a TCP SYN (or SCTP INIT).
This allows connections to fail over from one IPVS director to another
mid-flight.
Signed-off-by: Alexander Frolkin <avf@eldamar.org.uk>
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index f5faf85..95860df 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -978,6 +978,8 @@
int sysctl_sync_sock_size;
int sysctl_cache_bypass;
int sysctl_expire_nodest_conn;
+ int sysctl_sloppy_tcp;
+ int sysctl_sloppy_sctp;
int sysctl_expire_quiescent_template;
int sysctl_sync_threshold[2];
unsigned int sysctl_sync_refresh_period;
@@ -1020,6 +1022,8 @@
#define DEFAULT_SYNC_THRESHOLD 3
#define DEFAULT_SYNC_PERIOD 50
#define DEFAULT_SYNC_VER 1
+#define DEFAULT_SLOPPY_TCP 0
+#define DEFAULT_SLOPPY_SCTP 0
#define DEFAULT_SYNC_REFRESH_PERIOD (0U * HZ)
#define DEFAULT_SYNC_RETRIES 0
#define IPVS_SYNC_WAKEUP_RATE 8
@@ -1056,6 +1060,16 @@
return ipvs->sysctl_sync_ver;
}
+static inline int sysctl_sloppy_tcp(struct netns_ipvs *ipvs)
+{
+ return ipvs->sysctl_sloppy_tcp;
+}
+
+static inline int sysctl_sloppy_sctp(struct netns_ipvs *ipvs)
+{
+ return ipvs->sysctl_sloppy_sctp;
+}
+
static inline int sysctl_sync_ports(struct netns_ipvs *ipvs)
{
return ACCESS_ONCE(ipvs->sysctl_sync_ports);
@@ -1109,6 +1123,16 @@
return DEFAULT_SYNC_VER;
}
+static inline int sysctl_sloppy_tcp(struct netns_ipvs *ipvs)
+{
+ return DEFAULT_SLOPPY_TCP;
+}
+
+static inline int sysctl_sloppy_sctp(struct netns_ipvs *ipvs)
+{
+ return DEFAULT_SLOPPY_SCTP;
+}
+
static inline int sysctl_sync_ports(struct netns_ipvs *ipvs)
{
return 1;