linux-kernel - Re: [External] [PATCH 1/2] erofs: put metabuf in error path in fscache mode

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Message-ID: <b66ad97f-9d7e-0453-85e1-3b45ff14da6a@bytedance.com>
Date:   Mon, 7 Nov 2022 22:41:57 +0800
From:   Jia Zhu <zhujia.zj@...edance.com>
To:     Jingbo Xu <jefflexu@...ux.alibaba.com>, xiang@...nel.org,
        chao@...nel.org, huyue2@...lpad.com, linux-erofs@...ts.ozlabs.org
Cc:     yinxin.x@...edance.com, linux-kernel@...r.kernel.org
Subject: Re: [External] [PATCH 1/2] erofs: put metabuf in error path in
 fscache mode



在 2022/11/4 13:40, Jingbo Xu 写道:
> For tail packing layout, put metabuf when error is encountered.
> 
> Fixes: 1ae9470c3e14 ("erofs: clean up .read_folio() and .readahead() in fscache mode")
> Signed-off-by: Jingbo Xu <jefflexu@...ux.alibaba.com>
Reviewed-by: Jia Zhu <zhujia.zj@...edance.com>
> ---
>   fs/erofs/fscache.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/fs/erofs/fscache.c b/fs/erofs/fscache.c
> index fe05bc51f9f2..83559008bfa8 100644
> --- a/fs/erofs/fscache.c
> +++ b/fs/erofs/fscache.c
> @@ -287,8 +287,10 @@ static int erofs_fscache_data_read(struct address_space *mapping,
>   			return PTR_ERR(src);
>   
>   		iov_iter_xarray(&iter, READ, &mapping->i_pages, pos, PAGE_SIZE);
> -		if (copy_to_iter(src + offset, size, &iter) != size)
> +		if (copy_to_iter(src + offset, size, &iter) != size) {
> +			erofs_put_metabuf(&buf);
>   			return -EFAULT;
> +		}
>   		iov_iter_zero(PAGE_SIZE - size, &iter);
>   		erofs_put_metabuf(&buf);
>   		return PAGE_SIZE;