On 03/31/2010 04:50 PM, Hawrylewicz Czarnowski, Przemyslaw wrote:
> Patch also adds some utilities
One of which I see as being useful outside of the scope that you have
envisioned:
> diff --git a/mdstat.c b/mdstat.c
> index 4a9f370..bb6179d 100644
> --- a/mdstat.c
> +++ b/mdstat.c
This is a generic file and routines in this code should be generic, not
specific to a supertype.
> +
> +/*
> + * Finds name of the active array holding this device
> + * @param[in] devname name of member device
> + * @param[out] devname name of array
> + *
> + * @return found (0), or
> + * not found, failure (1)
> + */
> +
> +int mdstat_check_active(char *devname)
> +{
> + struct mdstat_ent *mdstat = mdstat_read(0, 0);
> + struct mdstat_ent *ent;
> + char *name;
> +
> + if (!devname)
> + return 1;
> + name = strrchr(devname, '/');
> + if (name++ == NULL)
> + return 1;
> +
> + for (ent = mdstat; ent; ent = ent->next) {
> + struct dev_member *m;
> + if (ent->active) /* only containers */
> + continue;
> + for (m = ent->members; m; m = m->next) {
> + if (!strcmp(m->name, name)) {
> + strcpy(devname, ent->dev);
> + return 0;
> + }
> + }
> + }
> + return 1;
> +}
This in particular is useful for things other than just looking up
containers. It is useful for finding either native or external metadata
based arrays that have a specific device in them. I will probably snag
this for my code, but change it so that it is generic.
--
Doug Ledford <dledford@xxxxxxxxxx>
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