From: Long Li <longli@microsoft.com>
Date: Fri, 30 Mar 2018 15:16:36 -0700
Subject: [PATCH] cifs: smbd: disconnect transport on RDMA errors
Git-commit: 21a4e14aaedbc85f203d37e56cb26235b22b43f6
Patch-mainline: v4.17-rc1
References: bsc#1144333
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>
Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
CC: Stable <stable@vger.kernel.org>
Acked-by: Aurelien Aptel <aaptel@suse.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 3f7883e2e14d..5008af546dd1 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;
}
--
2.16.4