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nvmf/rdma: Handle CQ resize for iWARP transport

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Since iWARP doesn't support CQ resize, we can't
accept new qpairs when CQ size is insufficient.
In other case if we accept new qpairs we can
et CQ overrun and receive IBV_EVENT_CQ_ERR ibv
async event. In that case we will have to close
all qpairs that use this CQ.

Part of the fix for issue #1747

Signed-off-by: Alexey Marchuk <alexeymar@mellanox.com>
Change-Id: I30b9163a7c8abb8651f8813c6bbdb80000741c9c
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/6106
Community-CI: Broadcom CI
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Ziye Yang <ziye.yang@intel.com>
This commit is contained in:
Alexey Marchuk 2021-01-26 19:59:13 +03:00 committed by Tomasz Zawadzki
parent 137866e573
commit 4a2c27f717
1 changed files with 6 additions and 1 deletions
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7
lib/nvmf/rdma.c
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@ -2,7 +2,7 @@
* BSD LICENSE
*
* Copyright (c) Intel Corporation. All rights reserved.
* Copyright (c) 2019, 2020 Mellanox Technologies LTD. All rights reserved.
* Copyright (c) 2019-2021 Mellanox Technologies LTD. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -944,6 +944,11 @@ nvmf_rdma_resize_cq(struct spdk_nvmf_rdma_qpair *rqpair, struct spdk_nvmf_rdma_d
}
if (rpoller->num_cqe != num_cqe) {
if (device->context->device->transport_type == IBV_TRANSPORT_IWARP) {
SPDK_ERRLOG("iWARP doesn't support CQ resize. Current capacity %u, required %u\n"
"Using CQ of insufficient size may lead to CQ overrun\n", rpoller->num_cqe, num_cqe);
return -1;
}
if (required_num_wr > device->attr.max_cqe) {
SPDK_ERRLOG("RDMA CQE requirement (%d) exceeds device max_cqe limitation (%d)\n",
required_num_wr, device->attr.max_cqe);