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rdma: decrement descriptor before checking SEND_WITH_INVAL

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We were incrementing over the end of the descriptor list and assigning
undefined values to the rsp opcode in SEND_WITH_INVAL case. We were only
hitting this error when mixing sgl and inline requests in the same
workload. We were just by chance hitting a four bit value that was set
to all 1s from the in capsule data from the last request.

Change-Id: Ied06356f3d22fa34a2cd869dfad6bdca8720791d
Signed-off-by: Seth Howell <seth.howell@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/450873
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
This commit is contained in:
Seth Howell 2019-04-10 17:14:44 -07:00 committed by Jim Harris
parent 3f2553a3f7
commit 7d7b44f2a6
1 changed files with 2 additions and 0 deletions
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2
lib/nvmf/rdma.c
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@ -1629,6 +1629,8 @@ nvmf_rdma_request_fill_iovs_multi_sgl(struct spdk_nvmf_rdma_transport *rtranspor
}
#ifdef SPDK_CONFIG_RDMA_SEND_WITH_INVAL
/* Go back to the last descriptor in the list. */
desc--;
if ((device->attr.device_cap_flags & IBV_DEVICE_MEM_MGT_EXTENSIONS) != 0) {
if (desc->keyed.subtype == SPDK_NVME_SGL_SUBTYPE_INVALIDATE_KEY) {
rdma_req->rsp.wr.opcode = IBV_WR_SEND_WITH_INV;