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ipvs: add sync_maxlen parameter for the sync daemon

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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>
This commit is contained in:
Julian Anastasov
2015-07-26 15:03:27 +03:00
committed by Simon Horman
parent e0b26cc997
commit e4ff675130
4 changed files with 108 additions and 102 deletions
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include/uapi/linux/ip_vs.h
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@@ -406,6 +406,7 @@ enum {
IPVS_DAEMON_ATTR_STATE, /* sync daemon state (master/backup) */
IPVS_DAEMON_ATTR_MCAST_IFN, /* multicast interface name */
IPVS_DAEMON_ATTR_SYNC_ID, /* SyncID we belong to */
IPVS_DAEMON_ATTR_SYNC_MAXLEN, /* UDP Payload Size */
__IPVS_DAEMON_ATTR_MAX,
};