Totem/cpg service/... adds headers to message, so even message which fits limit becomes larger. To prevent this to happen, smaller limit is checked.
Signed-off-by: Jan Friesse <[email protected]> --- lib/cpg.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/lib/cpg.c b/lib/cpg.c index 4b92f44..1cc021b 100644 --- a/lib/cpg.c +++ b/lib/cpg.c @@ -979,6 +979,14 @@ cs_error_t cpg_mcast_joined ( msg_len += iovec[i].iov_len; } + /* + * 512 is engineering aproximation of structure headers added by cpg/totem/... + * It's impossible to send larger messages + */ + if (msg_len > IPC_REQUEST_SIZE - 512) { + return (CS_ERR_TOO_BIG); + } + req_lib_cpg_mcast.header.size = sizeof (struct req_lib_cpg_mcast) + msg_len; -- 1.7.1 _______________________________________________ discuss mailing list [email protected] http://lists.corosync.org/mailman/listinfo/discuss
