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toollib: allow VG UUID to be used in place of VG name

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If the VG arg from the command line does not match the
name of any known VGs, then check if the arg looks like
a UUID.  If it's a valid UUID, then compare it to the
UUID of known VGs.  If it matches the UUID of a known VG,
then process that VG.
This commit is contained in:
David Teigland 2015-12-01 12:00:57 -06:00
parent 67763a9bec
commit 166adf0e1f
1 changed files with 39 additions and 0 deletions
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39
tools/toollib.c
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@ -2077,8 +2077,11 @@ static void _choose_vgs_to_process(struct cmd_context *cmd,
struct dm_list *vgnameids_on_system,
struct dm_list *vgnameids_to_process)
{
char uuid[64] __attribute__((aligned(8)));
struct dm_str_list *sl, *sl2;
struct vgnameid_list *vgnl, *vgnl2;
struct id id;
int arg_is_uuid;
int found;
dm_list_iterate_items_safe(sl, sl2, arg_vgnames) {
@ -2092,6 +2095,42 @@ static void _choose_vgs_to_process(struct cmd_context *cmd,
found = 1;
break;
}
/*
* If the VG name arg looks like a UUID, then check if it
* matches the UUID of a VG.
*
* FIXME: Do we want to allow vgname args to be interpretted
* as uuids for all commands or only some (e.g. vgrename)?
* If only some, then use a cmd flag to enable this.
*/
if (!found) {
log_suppress(2);
arg_is_uuid = id_read_format(&id, sl->str);
log_suppress(0);
}
if (!found && arg_is_uuid) {
dm_list_iterate_items_safe(vgnl, vgnl2, vgnameids_on_system) {
if (!(id_write_format((const struct id*)vgnl->vgid, uuid, sizeof(uuid))))
continue;
if (strcmp(sl->str, uuid))
continue;
log_print("Processing VG %s because of matching UUID %s",
vgnl->vg_name, uuid);
dm_list_del(&vgnl->list);
dm_list_add(vgnameids_to_process, &vgnl->list);
/* Make the arg_vgnames entry use the actual VG name. */
sl->str = dm_pool_strdup(cmd->mem, vgnl->vg_name);
found = 1;
break;
}
}
/*
* If the name arg was not found in the list of all VGs, then