[PATCH 5.4 108/203] NFSv4.x: Drop the slot if nfs4_delegreturn_prepare waits for layoutreturn

Greg Kroah-Hartman
2020-01-16T23:24:13Z

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

commit 5326de9e94bedcf7366e7e7625d4deb8c1f1ca8a upstream.

If nfs4_delegreturn_prepare needs to wait for a layoutreturn to complete
then make sure we drop the sequence slot if we hold it.

Fixes: 1c5bd76d17cc ("pNFS: Enable layoutreturn operation for return-on-close")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
fs/nfs/nfs4proc.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -6252,8 +6252,10 @@ static void nfs4_delegreturn_prepare(str

d_data = (struct nfs4_delegreturndata *)data;

- if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
+ if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) {
+ nfs4_sequence_done(task, &d_data->res.seq_res);
return;
+ }

lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL;
if (lo && !pnfs_layout_is_valid(lo)) {