ipvs: add sync_maxlen parameter for the sync daemon
Allow setups with large MTU to send large sync packets by
adding sync_maxlen parameter. The default value is now based
on MTU but no more than 1500 for compatibility reasons.
To avoid problems if MTU changes allow fragmentation by
sending packets with DF=0. Problem reported by Dan Carpenter.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
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 4e3731e..2fdc13c 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -846,6 +846,13 @@
/* How much time to keep dests in trash */
#define IP_VS_DEST_TRASH_PERIOD (120 * HZ)
+struct ipvs_sync_daemon_cfg {
+ int syncid;
+ u16 sync_maxlen;
+ /* multicast interface name */
+ char mcast_ifn[IP_VS_IFNAME_MAXLEN];
+};
+
/* IPVS in network namespace */
struct netns_ipvs {
int gen; /* Generation */
@@ -961,15 +968,10 @@
spinlock_t sync_buff_lock;
struct task_struct **backup_threads;
int threads_mask;
- int send_mesg_maxlen;
- int recv_mesg_maxlen;
volatile int sync_state;
- volatile int master_syncid;
- volatile int backup_syncid;
struct mutex sync_mutex;
- /* multicast interface name */
- char master_mcast_ifn[IP_VS_IFNAME_MAXLEN];
- char backup_mcast_ifn[IP_VS_IFNAME_MAXLEN];
+ struct ipvs_sync_daemon_cfg mcfg; /* Master Configuration */
+ struct ipvs_sync_daemon_cfg bcfg; /* Backup Configuration */
/* net name space ptr */
struct net *net; /* Needed by timer routines */
/* Number of heterogeneous destinations, needed becaus heterogeneous
@@ -1408,7 +1410,8 @@
/* IPVS sync daemon data and function prototypes
* (from ip_vs_sync.c)
*/
-int start_sync_thread(struct net *net, int state, char *mcast_ifn, __u8 syncid);
+int start_sync_thread(struct net *net, struct ipvs_sync_daemon_cfg *cfg,
+ int state);
int stop_sync_thread(struct net *net, int state);
void ip_vs_sync_conn(struct net *net, struct ip_vs_conn *cp, int pkts);