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

[Cedric Le Goater <clg@fr.ibm.com>]

> +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.