[dm-devel] [PATCH] check info.exists to get valid value
Christophe Varoqui
christophe.varoqui at opensvc.com
Tue Jul 1 18:32:33 UTC 2014
Applied.
Thanks.
On Wed, Jun 25, 2014 at 10:08 AM, Vaughan Cao <vaughan.cao at oracle.com>
wrote:
> dm_task_get_info will still return 1 if device doesn't exist.
> Check info.exists to ensure major and minor values are valid.
>
> There is no reason to assign info.open_count to @r here.
>
> Signed-off-by: Vaughan Cao <vaughan.cao at oracle.com>
> ---
> libmultipath/devmapper.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/libmultipath/devmapper.c b/libmultipath/devmapper.c
> index 30e9351..3d4c111 100644
> --- a/libmultipath/devmapper.c
> +++ b/libmultipath/devmapper.c
> @@ -567,10 +567,9 @@ dm_dev_t (const char * mapname, char * dev_t, int len)
> if (!dm_task_run(dmt))
> goto out;
>
> - if (!dm_task_get_info(dmt, &info))
> + if (!dm_task_get_info(dmt, &info) || !info.exists)
> goto out;
>
> - r = info.open_count;
> if (snprintf(dev_t, len, "%i:%i", info.major, info.minor) > len)
> goto out;
>
> --
> 1.9.0
>
>
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