io_uring: IORING_OP_WRITE needs hash_reg_file set

stable inclusion
from stable-5.10.65
commit 24fbd77d5a0fd2f22d5a0e8570499302b2dea2be
bugzilla: 182361 https://gitee.com/openeuler/kernel/issues/I4EH3U

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=24fbd77d5a0fd2f22d5a0e8570499302b2dea2be

--------------------------------

commit 7b3188e7 upstream.

During some testing, it became evident that using IORING_OP_WRITE doesn't
hash buffered writes like the other writes commands do. That's simply
an oversight, and can cause performance regressions when doing buffered
writes with this command.

Correct that and add the flag, so that buffered writes are correctly
hashed when using the non-iovec based write command.

Cc: stable@vger.kernel.org
Fixes: 3a6820f2 ("io_uring: add non-vectored read/write commands")
Signed-off-by: NJens Axboe <axboe@kernel.dk>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Acked-by: NWeilong Chen <chenweilong@huawei.com>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

fs/io_uring.c

@@ -889,6 +889,7 @@ static const struct io_op_def io_op_defs[] = {
 	},
 	[IORING_OP_WRITE] = {
 		.needs_file		= 1,
+		.hash_reg_file		= 1,
 		.unbound_nonreg_file	= 1,
 		.pollout		= 1,
 		.async_size		= sizeof(struct io_async_rw),