Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Dominique Martinet <asmadeus@codewreck.org>
Date:   Wed, 10 May 2023 19:52:53 +0900
Subject: [PATCH v2 5/6] libfs: set FMODE_NOWAIT on dir open
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
Message-Id: <20230422-uring-getdents-v2-5-2db1e37dc55e@codewreck.org>
References: <20230422-uring-getdents-v2-0-2db1e37dc55e@codewreck.org>
In-Reply-To: <20230422-uring-getdents-v2-0-2db1e37dc55e@codewreck.org>
To:     Alexander Viro <viro@zeniv.linux.org.uk>,
        Christian Brauner <brauner@kernel.org>,
        Jens Axboe <axboe@kernel.dk>,
        Pavel Begunkov <asml.silence@gmail.com>,
        Stefan Roesch <shr@fb.com>
Cc:     Clay Harris <bugs@claycon.org>, Dave Chinner <david@fromorbit.com>,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        io-uring@vger.kernel.org,
        Dominique Martinet <asmadeus@codewreck.org>
Precedence: bulk

the readdir can technically wait a bit on a spinlock, but that should
never wait for long enough to return EAGAIN -- just set the capability
flag on directories f_mode

Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
---
 fs/libfs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/libfs.c b/fs/libfs.c
index 89cf614a3271..a3c7e42d90a7 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -81,6 +81,7 @@ EXPORT_SYMBOL(simple_lookup);
 int dcache_dir_open(struct inode *inode, struct file *file)
 {
 	file->private_data = d_alloc_cursor(file->f_path.dentry);
+	file->f_mode |= FMODE_NOWAIT;
 
 	return file->private_data ? 0 : -ENOMEM;
 }

-- 
2.39.2