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commit e2c3c3fefa26287dcce1e70634792cff47d775ff
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Author: Michael J. Ruhl <michael.j.ruhl@intel.com>
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Date: Mon Oct 16 10:24:21 2017 -0400
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ibacm: Incorrect usage of BE byte order of MLID attach/detach_mcast()
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The MLID value passed to ibv_attach/detach_mcast() must be in host
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byte order.
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acmp.c incorrectly uses the big endian format when doing a multicast
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attach/detach (join). Multicast packets are used to do name resolution
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by the libibacmp library.
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There are two possible results because of this issue.
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If a kernel has commit 8561eae60ff9, the attach will fail with an
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EINVAL. ibacm will log this as a failure during the multicast join.
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If a kernel does not have commit 8561eae60ff9, the attach will
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complete successfully. Packets sent to this address will be dropped
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because the packet dlid value and the multicast address information
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given by the attach will not match.
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Update MLID usage to use the correct byte order.
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Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
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Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
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Signed-off-by: Doug Ledford <dledford@redhat.com>
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diff --git a/ibacm/prov/acmp/src/acmp.c b/ibacm/prov/acmp/src/acmp.c
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index aa784166..78d9a295 100644
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--- a/ibacm/prov/acmp/src/acmp.c
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+++ b/ibacm/prov/acmp/src/acmp.c
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@@ -732,7 +732,7 @@ static void acmp_process_join_resp(struct acm_sa_mad *sa_mad)
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acm_log(0, "ERROR - unable to create ah\n");
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goto out;
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}
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- ret = ibv_attach_mcast(ep->qp, &mc_rec->mgid, mc_rec->mlid);
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+ ret = ibv_attach_mcast(ep->qp, &dest->mgid, dest->av.dlid);
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if (ret) {
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acm_log(0, "ERROR - unable to attach QP to multicast group\n");
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ibv_destroy_ah(dest->ah);
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@@ -1429,7 +1429,7 @@ static void acmp_ep_join(struct acmp_ep *ep)
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if (ep->mc_dest[0].state == ACMP_READY && ep->mc_dest[0].ah) {
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ibv_detach_mcast(ep->qp, &ep->mc_dest[0].mgid,
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- be16toh(ep->mc_dest[0].av.dlid));
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+ ep->mc_dest[0].av.dlid);
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ibv_destroy_ah(ep->mc_dest[0].ah);
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ep->mc_dest[0].ah = NULL;
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}
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