linux-kernel - Re: [PATCH 1/5] io_uring: add IORING_ACCEPT

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Date:   Sat, 7 May 2022 12:05:13 +0800
From:   Hao Xu <haoxu.linux@...il.com>
To:     Jens Axboe <axboe@...nel.dk>, io-uring@...r.kernel.org
Cc:     Pavel Begunkov <asml.silence@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/5] io_uring: add IORING_ACCEPT_MULTISHOT for accept

在 5/6/22 10:32 PM, Jens Axboe 写道:
> On 5/6/22 1:00 AM, Hao Xu wrote:
>> From: Hao Xu <howeyxu@...cent.com>
>>
>> add an accept_flag IORING_ACCEPT_MULTISHOT for accept, which is to
>> support multishot.
>>
>> Signed-off-by: Hao Xu <howeyxu@...cent.com>
>> ---
>>   include/uapi/linux/io_uring.h | 5 +++++
>>   1 file changed, 5 insertions(+)
>>
>> diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h
>> index fad63564678a..73bc7e54ac18 100644
>> --- a/include/uapi/linux/io_uring.h
>> +++ b/include/uapi/linux/io_uring.h
>> @@ -213,6 +213,11 @@ enum {
>>   #define IORING_ASYNC_CANCEL_FD	(1U << 1)
>>   #define IORING_ASYNC_CANCEL_ANY	(1U << 2)
>>   
>> +/*
>> + * accept flags stored in accept_flags
>> + */
>> +#define IORING_ACCEPT_MULTISHOT	(1U << 15)
> 
> It isn't stored in accept_flags, is it? This is an io_uring private
> flag, and it's in ioprio. Which is honestly a good place for per-op
> private flags, since nobody really uses ioprio outside of read/write
> style requests. But the comment is wrong :-)

Ah, yes, thanks for pointing it out, I forgot to update the comment
>