nvme-rdma: Check remotely invalidated rkey matches our expected rkey

If we got a remote invalidation on a bogus rkey, this is a protocol error.
Fail the connection in this case.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index c03460d0ca94..3a952d458e7c 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -1334,8 +1334,13 @@ static int nvme_rdma_process_nvme_rsp(struct nvme_rdma_queue *queue,
         req->status = cqe->status;
         req->result = cqe->result;
 
-        if ((wc->wc_flags & IB_WC_WITH_INVALIDATE) &&
-            wc->ex.invalidate_rkey == req->mr->rkey) {
+        if (wc->wc_flags & IB_WC_WITH_INVALIDATE) {
+                if (unlikely(wc->ex.invalidate_rkey != req->mr->rkey)) {
+                        dev_err(queue->ctrl->ctrl.device,
+                                "Bogus remote invalidation for rkey %#x\n",
+                                req->mr->rkey);
+                        nvme_rdma_error_recovery(queue->ctrl);
+                }
                 req->mr->need_inval = false;
         } else if (req->mr->need_inval) {
                 ret = nvme_rdma_inv_rkey(queue, req);