[PATCH 5.18 0005/1095] pNFS/flexfiles: Report RDMA connection errors to the server

Greg Kroah-Hartman
2022-08-15T20:09:11Z

From: Trond Myklebust <trond.myklebust@hammerspace.com>

commit 7836d75467e9d214bdf5c693b32721de729a6e38 upstream.

The RPC/RDMA driver will return -EPROTO and -ENODEV as connection errors
under certain circumstances. Make sure that we handle them and report
them to the server. If not, we can end up cycling forever in a
LAYOUTGET/LAYOUTRETURN loop.

Fixes: a12f996d3413 ("NFSv4/pNFS: Use connections to a DS that are all of the same protocol family")
Cc: stable@vger.kernel.org # 5.11.x
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/nfs/flexfilelayout/flexfilelayout.c | 4 ++++
1 file changed, 4 insertions(+)

--- a/fs/nfs/flexfilelayout/flexfilelayout.c
+++ b/fs/nfs/flexfilelayout/flexfilelayout.c
@@ -1131,6 +1131,8 @@ static int ff_layout_async_handle_error_
case -EIO:
case -ETIMEDOUT:
case -EPIPE:
+ case -EPROTO:
+ case -ENODEV:
dprintk("%s DS connection error %d\n", __func__,
task->tk_status);
nfs4_delete_deviceid(devid->ld, devid->nfs_client,
@@ -1236,6 +1238,8 @@ static void ff_layout_io_track_ds_error(
case -ENOBUFS:
case -EPIPE:
case -EPERM:
+ case -EPROTO:
+ case -ENODEV:
*op_status = status = NFS4ERR_NXIO;
break;