linux-kernel - Re: [PATCH v2 2/4] erofs: support unencoded inodes for fileio

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Message-ID: <55267cdd-c832-45c9-bbe1-9c02473a2269@linux.alibaba.com>
Date: Thu, 5 Sep 2024 17:13:33 +0800
From: Gao Xiang <hsiangkao@...ux.alibaba.com>
To: Chao Yu <chao@...nel.org>, linux-erofs@...ts.ozlabs.org
Cc: LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/4] erofs: support unencoded inodes for fileio

Hi Chao,

On 2024/9/5 17:01, Chao Yu wrote:
> On 2024/8/30 11:28, Gao Xiang wrote:

..

>> +
>> +static void erofs_fileio_rq_submit(struct erofs_fileio_rq *rq)
>> +{
>> +    struct iov_iter iter;
>> +    int ret;
>> +
>> +    if (!rq)
>> +        return;
>> +    rq->iocb.ki_pos = rq->bio.bi_iter.bi_sector << 9;
> 
> Trivial cleanup,
> 
> rq->iocb.ki_pos = rq->bio.bi_iter.bi_sector << SECTOR_SHIFT;

Will send a quick fix version.

> 
>> +    rq->iocb.ki_ioprio = get_current_ioprio();
>> +    rq->iocb.ki_complete = erofs_fileio_ki_complete;
>> +    rq->iocb.ki_flags = (rq->iocb.ki_filp->f_mode & FMODE_CAN_ODIRECT) ?
>> +                IOCB_DIRECT : 0;
>> +    iov_iter_bvec(&iter, ITER_DEST, rq->bvecs, rq->bio.bi_vcnt,
>> +              rq->bio.bi_iter.bi_size);
>> +    ret = vfs_iocb_iter_read(rq->iocb.ki_filp, &rq->iocb, &iter);
>> +    if (ret != -EIOCBQUEUED)
>> +        erofs_fileio_ki_complete(&rq->iocb, ret);
> 
> Shouldn't we pass return value to caller?

I don't think it's needed.  Since ki_complete will handle error cases
for both (a)sync I/Os.

Thanks,
Gao Xiang

> 
> Thanks,
>