From 6fbdce3cde97896ff4c2fb99e5d4bba45297a178 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Thu, 1 Apr 2021 08:38:34 -0600
Subject: [PATCH] io_uring: don't mark S_ISBLK async work as unbounded
[ Upstream commit 4b982bd0f383db9132e892c0c5144117359a6289 ]
S_ISBLK is marked as unbounded work for async preparation, because it
doesn't match S_ISREG. That is incorrect, as any read/write to a block
device is also a bounded operation. Fix it up and ensure that S_ISBLK
isn't marked unbounded.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/io_uring.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 0de27e75460d12..dc1b0f6fd49b58 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1439,7 +1439,7 @@ static void io_prep_async_work(struct io_kiocb *req)
if (req->flags & REQ_F_ISREG) {
if (def->hash_reg_file || (ctx->flags & IORING_SETUP_IOPOLL))
io_wq_hash_work(&req->work, file_inode(req->file));
- } else {
+ } else if (!req->file || !S_ISBLK(file_inode(req->file)->i_mode)) {
if (def->unbound_nonreg_file)
req->work.flags |= IO_WQ_WORK_UNBOUND;
}
--
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