enforce local binding is specified for unmapped multicast addresses, otherwise
mckey
crashes when attempting to use the cma_id->verbs pointer in the port query verb.
Signed-off-by: Or Gerlitz <ogerl...@voltaire.com>
Sean, using unmapped multicast addresses I see that a different broacast group
is
created by the SM such that mckey doesn't manage to join the ipv4 broadcast
group
$ ./mckey -M ff12:401b:ffff:0:0:0:ffff:ffff -b 10.10.5.62 -p 0x2
mckey: joined dgid: ff12:401b:ffff:: mlid c00b sl 0
looking in the SA, I see that the MGID used by the rdma-cm is a bif different
from the one used by IPoIB, since the former uses/set only the lower 28 bits
where
the latter sets the lower 32 bits for this mgid, any idea what can be done
here?
$ saquery $THIS_NODE_LID
MCMemberRecord group dump:
MGID....................ff12:401b:ffff::ffff:ffff
Mlid....................0xC000
Mtu.....................0x84
pkey....................0xFFFF
Rate....................0x83
SL......................0x0
....
MCMemberRecord group dump:
MGID....................ff12:401b:ffff::fff:ffff
Mlid....................0xC00B
Mtu.....................0x84
pkey....................0xFFFF
Rate....................0x83
SL......................0x0
Index: librdmacm/examples/mckey.c
===================================================================
--- librdmacm.orig/examples/mckey.c
+++ librdmacm/examples/mckey.c
@@ -273,7 +273,7 @@ static int join_handler(struct cmatest_n
char buf[40];
inet_ntop(AF_INET6, param->ah_attr.grh.dgid.raw, buf, 40);
- printf("mckey: joined dgid: %s\n", buf);
+ printf("mckey: joined dgid: %s mlid %x sl %d\n", buf,
param->ah_attr.dlid, param->ah_attr.sl);
node->remote_qpn = param->qp_num;
node->remote_qkey = param->qkey;
@@ -556,6 +556,11 @@ int main(int argc, char **argv)
}
}
+ if (unmapped_addr && !src_addr) {
+ printf("unmapped multicast address requires binding to source
address\n");
+ exit(1);
+ }
+
test.dst_addr = (struct sockaddr *) &test.dst_in;
test.connects_left = connections;
--
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