Commit 25980820 authored Nov 22, 2021 by Maurizio Lombardi Committed by Greg Kroah-Hartman Dec 01, 2021

nvmet: use IOCB_NOWAIT only if the filesystem supports it



[ Upstream commit c024b226a417c4eb9353ff500b1c823165d4d508 ]

Submit I/O requests with the IOCB_NOWAIT flag set only if
the underlying filesystem supports it.

Fixes: 50a909db ("nvmet: use IOCB_NOWAIT for file-ns buffered I/O")
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent d54662a9

drivers/nvme/target/io-cmd-file.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -8,6 +8,7 @@
		#include <linux/uio.h>
		#include <linux/falloc.h>
		#include <linux/file.h>
		#include <linux/fs.h>
		#include "nvmet.h"

		#define NVMET_MAX_MPOOL_BVEC 16
		@@ -254,6 +255,7 @@ static void nvmet_file_execute_rw(struct nvmet_req *req)

		if (req->ns->buffered_io) {
		if (likely(!req->f.mpool_alloc) &&
		(req->ns->file->f_mode & FMODE_NOWAIT) &&
		nvmet_file_execute_io(req, IOCB_NOWAIT))
		return;
		nvmet_file_submit_buffered_io(req);