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Subject[PATCH 2/2] cifs: smbd: disconnect transport on RDMA errors
Date
From: Long Li <longli@microsoft.com>

On RDMA errors, transport should disconnect the RDMA CM connection. This
will notify the upper layer, and it will attempt transport reconnect.

Signed-off-by: Long Li <longli@microsoft.com>
---
fs/cifs/smbdirect.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c
index 3f7883e..5008af5 100644
--- a/fs/cifs/smbdirect.c
+++ b/fs/cifs/smbdirect.c
@@ -862,6 +862,8 @@ static int smbd_post_send_negotiate_req(struct smbd_connection *info)
ib_dma_unmap_single(info->id->device, request->sge[0].addr,
request->sge[0].length, DMA_TO_DEVICE);

+ smbd_disconnect_rdma_connection(info);
+
dma_mapping_failed:
mempool_free(request, info->request_mempool);
return rc;
@@ -1061,6 +1063,7 @@ static int smbd_post_send(struct smbd_connection *info,
if (atomic_dec_and_test(&info->send_pending))
wake_up(&info->wait_send_pending);
}
+ smbd_disconnect_rdma_connection(info);
} else
/* Reset timer for idle connection after packet is sent */
mod_delayed_work(info->workqueue, &info->idle_timer_work,
@@ -1202,7 +1205,7 @@ static int smbd_post_recv(
if (rc) {
ib_dma_unmap_single(info->id->device, response->sge.addr,
response->sge.length, DMA_FROM_DEVICE);
-
+ smbd_disconnect_rdma_connection(info);
log_rdma_recv(ERR, "ib_post_recv failed rc=%d\n", rc);
}

@@ -2546,6 +2549,8 @@ struct smbd_mr *smbd_register_mr(
if (atomic_dec_and_test(&info->mr_used_count))
wake_up(&info->wait_for_mr_cleanup);

+ smbd_disconnect_rdma_connection(info);
+
return NULL;
}

--
2.7.4
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