From 01887ccc308a555fed9701f15298e91010db42d7 Mon Sep 17 00:00:00 2001
From: Alexey Marchuk <alexeymar@mellanox.com>
Date: Wed, 24 Nov 2021 15:04:56 +0300
Subject: [PATCH] rdma: Set REMOTE_WRITE permission for iWARP on target side

iWARP requires REMOTE_WRITE permission ofr RDMA_READ
operation.

Fixes #2253

Signed-off-by: Alexey Marchuk <alexeymar@mellanox.com>
Change-Id: Iddfda091903e000d1c4839c1fce67bf25d4a13c2
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/10392
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Dong Yi <dongx.yi@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
---
 lib/rdma/common.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/rdma/common.c b/lib/rdma/common.c
index 37de0ffde7..2d59c23a05 100644
--- a/lib/rdma/common.c
+++ b/lib/rdma/common.c
@@ -73,6 +73,10 @@ rdma_mem_notify(void *cb_ctx, struct spdk_mem_map *map,
 			switch (rmap->role) {
 			case SPDK_RDMA_MEMORY_MAP_ROLE_TARGET:
 				access_flags = IBV_ACCESS_LOCAL_WRITE;
+				if (pd->context->device->transport_type == IBV_TRANSPORT_IWARP) {
+					/* IWARP requires REMOTE_WRITE permission for RDMA_READ operation */
+					access_flags |= IBV_ACCESS_REMOTE_WRITE;
+				}
 				break;
 			case SPDK_RDMA_MEMORY_MAP_ROLE_INITIATOR:
 				access_flags = IBV_ACCESS_LOCAL_WRITE | IBV_ACCESS_REMOTE_READ | IBV_ACCESS_REMOTE_WRITE;