Hi Sean,
In mad.c::ib_create_send_mad, if rmpp is active, the payload length is
calculated as follows:
if (rmpp_active) {
...
rmpp_mad->rmpp_hdr.paylen_newwin = cpu_to_be32(hdr_len -
offsetof(struct ib_rmpp_mad, data) + data_len);
Then in mad_rmpp.c::send_next_seg, I see:
if (mad_send_wr->seg_num == 1) {
rmpp_mad->rmpp_hdr.rmpp_rtime_flags |= IB_MGMT_RMPP_FLAG_FIRST;
rmpp_mad->rmpp_hdr.paylen_newwin =
cpu_to_be32(mad_send_wr->total_seg *
(sizeof(struct ib_rmpp_mad) -
offsetof(struct ib_rmpp_mad, data)));
That appears to me to overwrite the initial paylen but I might have
missed something here.
In any case, doesn't the initial payload length need to be the number of
segments times (hdr_len - offsetof(struct ib_rmpp_mad, data)) + data_len
? If so, that's part of the problem.
Another alternative would be not to set paylen in the first segment.
-- Hal
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