linux-kernel - Re: [PATCH 3/9] Introduce context structure needed during checkpointing/restart

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Message-ID: <48BE9B74.7010600@fr.ibm.com>
Date:	Wed, 03 Sep 2008 16:13:08 +0200
From:	Cedric Le Goater <clg@...ibm.com>
To:	Andrey Mirkin <major@...nvz.org>
CC:	linux-kernel@...r.kernel.org, containers@...ts.linux-foundation.org
Subject: Re: [PATCH 3/9] Introduce context structure needed during	checkpointing/restart


> +void context_release(struct cpt_context *ctx)
> +{
> +	ctx->ctx_state = CPT_CTX_ERROR;
> +
> +	if (ctx->file)
> +		fput(ctx->file);
> +	kfree(ctx);
> +}
> +
> +static void context_put(struct cpt_context *ctx)
> +{
> +	if (!--ctx->refcount)
> +		context_release(ctx);
> +}
> +
>  static int checkpoint(pid_t pid, int fd, unsigned long flags)
>  {
> -	return -ENOSYS; 
> +	struct file *file;
> +	struct cpt_context *ctx;
> +	int err;
> +
> +	err = -EBADF;
> +	file = fget(fd);
> +	if (!file)
> +		goto out;
> +
> +	err = -ENOMEM;
> +	ctx = context_alloc();
> +	if (!ctx)
> +		goto out_file;
> +
> +	ctx->file = file;
> +	ctx->ctx_state = CPT_CTX_DUMPING;
> +
> +	/* checkpoint */
> +	err = -ENOSYS;
> +
> +	context_put(ctx);
> +
> +out_file:
> +	fput(file);
> +out:
> +	return err; 
>  }

it looks like fput(file) is done twice in checkpoint() and context_release() ?

C.
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