On Fri, Jul 12, 2024 at 07:14:38PM +0200, Martin Wilck wrote:
> Signed-off-by: Martin Wilck <[email protected]>
Reviewed-by: Benjamin Marzinski <[email protected]>
> ---
> libmultipath/devmapper.c | 59 ++++++++++------------------------------
> 1 file changed, 15 insertions(+), 44 deletions(-)
>
> diff --git a/libmultipath/devmapper.c b/libmultipath/devmapper.c
> index 47ff827..11bccb1 100644
> --- a/libmultipath/devmapper.c
> +++ b/libmultipath/devmapper.c
> @@ -975,52 +975,23 @@ static int dm_type_match(const char *name, char *type)
>
> int dm_is_mpath(const char *name)
> {
> - int r = DM_IS_MPATH_ERR;
> - struct dm_task __attribute__((cleanup(cleanup_dm_task))) *dmt = NULL;
> - struct dm_info info;
> - uint64_t start, length;
> - char *target_type = NULL;
> - char *params;
> - const char *uuid;
> + char uuid[DM_UUID_LEN];
> + int rc = libmp_mapinfo(DM_MAP_BY_NAME | MAPINFO_MPATH_ONLY,
> + (mapid_t) { .str = name },
> + (mapinfo_t) { .uuid = uuid });
>
> - if (!(dmt = libmp_dm_task_create(DM_DEVICE_TABLE)))
> - goto out;
> -
> - if (!dm_task_set_name(dmt, name))
> - goto out;
> -
> - if (!libmp_dm_task_run(dmt)) {
> - dm_log_error(3, DM_DEVICE_TABLE, dmt);
> - goto out;
> + switch (rc) {
> + case DMP_OK:
> + if (!strncmp(uuid, UUID_PREFIX, UUID_PREFIX_LEN))
> + return DM_IS_MPATH_YES;
> + /* fallthrough */
> + case DMP_NOT_FOUND:
> + case DMP_NO_MATCH:
> + return DM_IS_MPATH_NO;
> + case DMP_ERR:
> + default:
> + return DM_IS_MPATH_ERR;
> }
> -
> - if (!dm_task_get_info(dmt, &info))
> - goto out;
> -
> - r = DM_IS_MPATH_NO;
> -
> - if (!info.exists)
> - goto out;
> -
> - uuid = dm_task_get_uuid(dmt);
> -
> - if (!uuid || strncmp(uuid, UUID_PREFIX, UUID_PREFIX_LEN) != 0)
> - goto out;
> -
> - /* Fetch 1st target */
> - if (dm_get_next_target(dmt, NULL, &start, &length, &target_type,
> - ¶ms) != NULL)
> - /* multiple targets */
> - goto out;
> -
> - if (!target_type || strcmp(target_type, TGT_MPATH) != 0)
> - goto out;
> -
> - r = DM_IS_MPATH_YES;
> -out:
> - if (r == DM_IS_MPATH_ERR)
> - condlog(3, "%s: dm command failed in %s: %s", name, __func__,
> strerror(errno));
> - return r;
> }
>
> int dm_map_present_by_wwid(const char *wwid)
> --
> 2.45.2
