void init_snapshot_merge(struct lv_segment *snap_seg,
struct logical_volume *origin)
{
snap_seg->status |= MERGING;
origin->snapshot = snap_seg;
origin->status |= MERGING;
if (seg_is_thin_volume(snap_seg)) {
snap_seg->merge_lv = origin;
/* Making thin LV invisible with regular log */
lv_set_hidden(snap_seg->lv);
return;
}
/*
* Even though lv_is_visible(snap_seg->lv) returns 0,
* the snap_seg->lv (name: snapshotX) is _not_ hidden;
* this is part of the lvm2 snapshot fiction. Must
* clear VISIBLE_LV directly (lv_set_visible can't)
* - snap_seg->lv->status is used to control whether 'lv'
* (with user provided snapshot LV name) is visible
* - this also enables vg_validate() to succeed with
* merge metadata (snap_seg->lv is now "internal")
*/
snap_seg->lv->status &= ~VISIBLE_LV;
}
static int attach_metadata_devices(struct lv_segment *seg, struct dm_list *list)
{
struct cmd_context *cmd = seg->lv->vg->cmd;
struct lv_list *lvl, *tmp;
if (seg_is_raid(seg)) {
dm_list_iterate_items_safe(lvl, tmp, list) {
lv_set_hidden(lvl->lv);
dm_pool_free(cmd->mem, lvl);
}
return 1;
}
void init_snapshot_seg(struct lv_segment *seg, struct logical_volume *origin,
struct logical_volume *cow, uint32_t chunk_size)
{
seg->chunk_size = chunk_size;
seg->origin = origin;
seg->cow = cow;
lv_set_hidden(cow);
cow->snapshot = seg;
origin->origin_count++;
/* FIXME Assumes an invisible origin belongs to a sparse device */
if (!lv_is_visible(origin))
origin->status |= VIRTUAL_ORIGIN;
seg->lv->status |= (SNAPSHOT | VIRTUAL);
dm_list_add(&origin->snapshot_segs, &seg->origin_list);
}
