[CRIU] [PATCH] kdat: Don't open /run/criu.kdat if doesn't exists

[Adrian Reber]

Sounds like a good idea. When testing I am also sometimes surprised by
that warning.

Acked-by: Adrian Reber <areber at redhat.com>

On Sun, Jul 01, 2018 at 07:13:58PM +0100, Radostin Stoyanov wrote:
> When CRIU is called for a first time and the /run/criu.kdat file does
> not exists, the following warning is shown:
>         Warn  (criu/kerndat.c:847): Can't load /run/criu.kdat
> 
> This patch is replacing this warning with a more appropriate debug message.
>         File /run/criu.kdat does not exist
> 
> Signed-off-by: Radostin Stoyanov <rstoyanov1 at gmail.com>
> ---
>  criu/kerndat.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/criu/kerndat.c b/criu/kerndat.c
> index 9b93487c..57a97886 100644
> --- a/criu/kerndat.c
> +++ b/criu/kerndat.c
> @@ -842,6 +842,11 @@ static int kerndat_try_load_cache(void)
>  {
>  	int fd, ret;
>  
> +	if(access(KERNDAT_CACHE_FILE, F_OK) == -1) {
> +		pr_debug("File %s does not exist\n", KERNDAT_CACHE_FILE);
> +		return 1;
> +	}
> +
>  	fd = open(KERNDAT_CACHE_FILE, O_RDONLY);
>  	if (fd < 0) {
>  		pr_warn("Can't load %s\n", KERNDAT_CACHE_FILE);
> -- 
> 2.17.1
> 
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