/*
* _determine_cache_argument
* @vg
* @lp
*
* 'lp->origin' is set with an LV that could be either the origin
* or the cache_pool of the cached LV which is being created. This
* function determines which it is and sets 'lp->origin' or
* 'lp->pool' appropriately.
*/
static int _determine_cache_argument(struct volume_group *vg,
struct lvcreate_params *lp)
{
struct lv_list *lvl;
if (!seg_is_cache(lp)) {
log_error(INTERNAL_ERROR
"Unable to determine cache argument on %s segtype",
lp->segtype->name);
return 0;
}
if (!lp->origin) {
log_error(INTERNAL_ERROR "Origin LV is not defined.");
return 0;
}
if (!(lvl = find_lv_in_vg(vg, lp->origin))) {
log_error("LV %s not found in Volume group %s.",
lp->origin, vg->name);
return 0;
}
if (lv_is_cache_pool(lvl->lv)) {
lp->pool = lp->origin;
lp->origin = NULL;
} else {
lp->pool = NULL;
lp->create_pool = 1;
}
return 1;
}
/*
* Normal snapshot or thinly-provisioned snapshot?
*/
static int _determine_snapshot_type(struct volume_group *vg,
struct lvcreate_params *lp)
{
struct lv_list *lvl;
if (!(lvl = find_lv_in_vg(vg, lp->origin))) {
log_error("Snapshot origin LV %s not found in Volume group %s.",
lp->origin, vg->name);
return 0;
}
if (!arg_count(vg->cmd, extents_ARG) && !arg_count(vg->cmd, size_ARG)) {
if (!lv_is_thin_volume(lvl->lv)) {
log_error("Please specify either size or extents with snapshots.");
return 0;
}
lp->thin = 1;
if (!(lp->segtype = get_segtype_from_string(vg->cmd, "thin")))
return_0;
lp->pool = first_seg(lvl->lv)->pool_lv->name;
}
return 1;
}
/*
* FIXME: This function should probably not commit to disk but require calling
* lvm_vg_write. However, this appears to be non-trivial change until
* lv_create_single is refactored by segtype.
*/
lv_t lvm_vg_create_lv_linear(vg_t vg, const char *name, uint64_t size)
{
struct lvcreate_params lp;
uint64_t extents;
struct lv_list *lvl;
if (vg_read_error(vg))
return NULL;
if (!vg_check_write_mode(vg))
return NULL;
memset(&lp, 0, sizeof(lp));
extents = extents_from_size(vg->cmd, size, vg->extent_size);
_lv_set_default_params(&lp, vg, name, extents);
_lv_set_default_linear_params(vg->cmd, &lp);
if (!lv_create_single(vg, &lp))
return NULL;
lvl = find_lv_in_vg(vg, name);
if (!lvl)
return NULL;
return (lv_t) lvl->lv;
}
/*
* lvrename command implementation.
* Check arguments and call lv_rename() to execute the request.
*/
int lvrename(struct cmd_context *cmd, int argc, char **argv)
{
size_t maxlen;
char *lv_name_old, *lv_name_new;
const char *vg_name, *vg_name_new, *vg_name_old;
char *st;
int r = ECMD_FAILED;
struct volume_group *vg = NULL;
struct lv_list *lvl;
if (argc == 3) {
vg_name = skip_dev_dir(cmd, argv[0], NULL);
lv_name_old = argv[1];
lv_name_new = argv[2];
if (strchr(lv_name_old, '/') &&
(vg_name_old = extract_vgname(cmd, lv_name_old)) &&
strcmp(vg_name_old, vg_name)) {
log_error("Please use a single volume group name "
"(\"%s\" or \"%s\")", vg_name, vg_name_old);
return EINVALID_CMD_LINE;
}
} else if (argc == 2) {
lv_name_old = argv[0];
lv_name_new = argv[1];
vg_name = extract_vgname(cmd, lv_name_old);
} else {
log_error("Old and new logical volume names required");
return EINVALID_CMD_LINE;
}
if (!validate_name(vg_name)) {
log_error("Please provide a valid volume group name");
return EINVALID_CMD_LINE;
}
if (strchr(lv_name_new, '/') &&
(vg_name_new = extract_vgname(cmd, lv_name_new)) &&
strcmp(vg_name, vg_name_new)) {
log_error("Logical volume names must "
"have the same volume group (\"%s\" or \"%s\")",
vg_name, vg_name_new);
return EINVALID_CMD_LINE;
}
if ((st = strrchr(lv_name_old, '/')))
lv_name_old = st + 1;
if ((st = strrchr(lv_name_new, '/')))
lv_name_new = st + 1;
/* Check sanity of new name */
maxlen = NAME_LEN - strlen(vg_name) - strlen(cmd->dev_dir) - 3;
if (strlen(lv_name_new) > maxlen) {
log_error("New logical volume path exceeds maximum length "
"of %" PRIsize_t "!", maxlen);
return ECMD_FAILED;
}
if (!*lv_name_new) {
log_error("New logical volume name may not be blank");
return ECMD_FAILED;
}
if (!apply_lvname_restrictions(lv_name_new)) {
stack;
return ECMD_FAILED;
}
if (!validate_name(lv_name_new)) {
log_error("New logical volume name \"%s\" is invalid",
lv_name_new);
return EINVALID_CMD_LINE;
}
if (!strcmp(lv_name_old, lv_name_new)) {
log_error("Old and new logical volume names must differ");
return EINVALID_CMD_LINE;
}
log_verbose("Checking for existing volume group \"%s\"", vg_name);
vg = vg_read_for_update(cmd, vg_name, NULL, 0);
if (vg_read_error(vg)) {
release_vg(vg);
stack;
return ECMD_FAILED;
}
if (!(lvl = find_lv_in_vg(vg, lv_name_old))) {
log_error("Existing logical volume \"%s\" not found in "
"volume group \"%s\"", lv_name_old, vg_name);
goto error;
}
if (!lv_rename(cmd, lvl->lv, lv_name_new))
goto error;
log_print("Renamed \"%s\" to \"%s\" in volume group \"%s\"",
lv_name_old, lv_name_new, vg_name);
r = ECMD_PROCESSED;
error:
unlock_and_release_vg(cmd, vg, vg_name);
return r;
}