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

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Date:	Wed, 3 Sep 2008 18:29:52 +0400
From:	Andrey Mirkin <major@...nvz.org>
To:	Cedric Le Goater <clg@...ibm.com>
Cc:	linux-kernel@...r.kernel.org, containers@...ts.linux-foundation.org
Subject: Re: [PATCH 3/9] Introduce context structure needed during	checkpointing/restart

On Wednesday 03 September 2008 18:13 Cedric Le Goater wrote:
> > +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() ?

Oh, you are right. I'm sorry, I was in rush and sent an outdated version.
Will resend correct patch shortly.

Thanks,
Andrey
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