linux-kernel - Re: [PATCH v4] cachefiles: fix error return code in cachefiles_ondemand

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Date:   Fri, 26 Aug 2022 11:33:59 +0800
From:   Gao Xiang <hsiangkao@...ux.alibaba.com>
To:     Sun Ke <sunke32@...wei.com>
Cc:     dhowells@...hat.com, linux-cachefs@...hat.com,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, jefflexu@...ux.alibaba.com,
        dan.carpenter@...cle.com
Subject: Re: [PATCH v4] cachefiles: fix error return code in
 cachefiles_ondemand_copen()

On Fri, Aug 26, 2022 at 10:35:15AM +0800, Sun Ke wrote:
> The cache_size field of copen is specified by the user daemon.
> If cache_size < 0, then the OPEN request is expected to fail,
> while copen itself shall succeed. However, returning 0 is indeed
> unexpected when cache_size is an invalid error code.
> 
> Fix this by returning error when cache_size is an invalid error code.
> 
> Fixes: c8383054506c ("cachefiles: notify the user daemon when looking up cookie")
> Signed-off-by: Sun Ke <sunke32@...wei.com>
> Suggested-by: Jeffle Xu <jefflexu@...ux.alibaba.com>
> Suggested-by: Dan Carpenter <dan.carpenter@...cle.com>

Reviewed-by: Gao Xiang <hsiangkao@...ux.alibaba.com>

Thanks,
Gao Xiang