linux-kernel - Re: [PATCH] io_uring: simplify io_remove

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Date:   Sat, 2 Jan 2021 19:25:47 +0000
From:   Pavel Begunkov <asml.silence@...il.com>
To:     Yejune Deng <yejune.deng@...il.com>, viro@...iv.linux.org.uk,
        axboe@...nel.dk
Cc:     linux-fsdevel@...r.kernel.org, io-uring@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] io_uring: simplify io_remove_personalities()

On 24/12/2020 03:02, Yejune Deng wrote:
> The function io_remove_personalities() is very similar to
> io_unregister_personality(),so implement io_remove_personalities()
> calling io_unregister_personality().

Please, don't forget to specify a version in the subject, e.g.
[PATCH v2], add a changelog after "---" and add tags from previous
threads if any.

Looks good
Reviewed-by: Pavel Begunkov <asml.silence@...il.com>

> 
> Signed-off-by: Yejune Deng <yejune.deng@...il.com>
> ---
>  fs/io_uring.c | 28 +++++++++++-----------------
>  1 file changed, 11 insertions(+), 17 deletions(-)
> 
> diff --git a/fs/io_uring.c b/fs/io_uring.c
> index b749578..dc913fa 100644
> --- a/fs/io_uring.c
> +++ b/fs/io_uring.c
> @@ -8608,9 +8608,8 @@ static int io_uring_fasync(int fd, struct file *file, int on)
>  	return fasync_helper(fd, file, on, &ctx->cq_fasync);
>  }
>  
> -static int io_remove_personalities(int id, void *p, void *data)
> +static int io_unregister_personality(struct io_ring_ctx *ctx, unsigned id)
>  {
> -	struct io_ring_ctx *ctx = data;
>  	struct io_identity *iod;
>  
>  	iod = idr_remove(&ctx->personality_idr, id);
> @@ -8618,7 +8617,17 @@ static int io_remove_personalities(int id, void *p, void *data)
>  		put_cred(iod->creds);
>  		if (refcount_dec_and_test(&iod->count))
>  			kfree(iod);
> +		return 0;
>  	}
> +
> +	return -EINVAL;
> +}
> +
> +static int io_remove_personalities(int id, void *p, void *data)
> +{
> +	struct io_ring_ctx *ctx = data;
> +
> +	io_unregister_personality(ctx, id);
>  	return 0;
>  }
>  
> @@ -9679,21 +9688,6 @@ static int io_register_personality(struct io_ring_ctx *ctx)
>  	return ret;
>  }
>  
> -static int io_unregister_personality(struct io_ring_ctx *ctx, unsigned id)
> -{
> -	struct io_identity *iod;
> -
> -	iod = idr_remove(&ctx->personality_idr, id);
> -	if (iod) {
> -		put_cred(iod->creds);
> -		if (refcount_dec_and_test(&iod->count))
> -			kfree(iod);
> -		return 0;
> -	}
> -
> -	return -EINVAL;
> -}
> -
>  static int io_register_restrictions(struct io_ring_ctx *ctx, void __user *arg,
>  				    unsigned int nr_args)
>  {
> 

-- 
Pavel Begunkov