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From: Pavel Begunkov <[email protected]>
To: Jens Axboe <[email protected]>,
	[email protected], [email protected]
Subject: [PATCH 5/6] io_uring: get rid of manual punting in io_close
Date: Tue, 26 May 2020 20:34:06 +0300	[thread overview]
Message-ID: <7ba646691b413f40f1c43d37d4356e451c38395f.1590513806.git.asml.silence@gmail.com> (raw)
In-Reply-To: <[email protected]>

io_close() was punting async manually to skip grabbing files. Use
REQ_F_NO_FILE_TABLE instead, and pass it through the generic path
with -EAGAIN.

Signed-off-by: Pavel Begunkov <[email protected]>
---
 fs/io_uring.c | 20 +++++---------------
 1 file changed, 5 insertions(+), 15 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index acf6ce9eee68..ac1aa25f4a55 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3492,25 +3492,15 @@ static int io_close(struct io_kiocb *req, bool force_nonblock)
 
 	req->close.put_file = NULL;
 	ret = __close_fd_get_file(req->close.fd, &req->close.put_file);
-	if (ret < 0) {
-		if (ret == -ENOENT)
-			ret = -EBADF;
-		return ret;
-	}
+	if (ret < 0)
+		return (ret == -ENOENT) ? -EBADF : ret;
 
 	/* if the file has a flush method, be safe and punt to async */
 	if (req->close.put_file->f_op->flush && force_nonblock) {
-		/* submission ref will be dropped, take it for async */
-		refcount_inc(&req->refs);
-
+		/* avoid grabbing files - we don't need the files */
+		req->flags |= REQ_F_NO_FILE_TABLE | REQ_F_MUST_PUNT;
 		req->work.func = io_close_finish;
-		/*
-		 * Do manual async queue here to avoid grabbing files - we don't
-		 * need the files, and it'll cause io_close_finish() to close
-		 * the file again and cause a double CQE entry for this request
-		 */
-		io_queue_async_work(req);
-		return 0;
+		return -EAGAIN;
 	}
 
 	/*
-- 
2.24.0


  parent reply	other threads:[~2020-05-26 17:35 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-26 17:34 [PATCH 0/6] random patches for 5.8 Pavel Begunkov
2020-05-26 17:34 ` [PATCH 1/6] io_uring: fix flush req->refs underflow Pavel Begunkov
2020-05-26 18:04   ` Jens Axboe
2020-05-26 17:34 ` [PATCH 2/6] io_uring: simplify io_timeout locking Pavel Begunkov
2020-05-26 17:34 ` [PATCH 3/6] io_uring: don't re-read sqe->off in timeout_prep() Pavel Begunkov
2020-05-26 17:34 ` [PATCH 4/6] io_uring: separate DRAIN flushing into a cold path Pavel Begunkov
2020-05-26 17:34 ` Pavel Begunkov [this message]
2020-05-26 17:34 ` [PATCH 6/6] io_uring: let io_req_aux_free() handle fixed files Pavel Begunkov
2020-05-26 18:03   ` Jens Axboe
2020-05-26 18:11     ` Pavel Begunkov
2020-05-26 19:32 ` [PATCH 0/6] random patches for 5.8 Jens Axboe

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