static int lvscan_single(struct cmd_context *cmd, struct logical_volume *lv,
void *handle) // __attribute((unused)))
{
struct lvinfo info;
int lv_total = 0;
uint64_t lv_capacity_total = 0;
int inkernel, snap_active = 1;
struct lv_segment *snap_seg = NULL;
float snap_percent; /* fused, fsize; */
const char *active_str, *snapshot_str;
if (!arg_count(cmd, all_ARG) && !lv_is_visible(lv))
return ECMD_PROCESSED;
inkernel = lv_info(cmd, lv, &info, 1) && info.exists;
if (lv_is_origin(lv)) {
list_iterate_items_gen(snap_seg, struct lv_segment, &lv->snapshot_segs,
origin_list) {
if (inkernel &&
(snap_active = lv_snapshot_percent(snap_seg->cow,
&snap_percent)))
if (snap_percent < 0 || snap_percent >= 100)
snap_active = 0;
}
snap_seg = NULL;
} else if (lv_is_cow(lv)) {
static int _lvsegs_single(struct cmd_context *cmd, struct logical_volume *lv,
void *handle)
{
if (!arg_count(cmd, all_ARG) && !lv_is_visible(lv))
return ECMD_PROCESSED;
return process_each_segment_in_lv(cmd, lv, handle, _segs_single);
}
static int _lvs_single(struct cmd_context *cmd, struct logical_volume *lv,
void *handle)
{
if (!arg_count(cmd, all_ARG) && !lv_is_visible(lv))
return ECMD_PROCESSED;
if (!report_object(handle, lv->vg, lv, NULL, NULL, NULL))
return ECMD_FAILED;
return ECMD_PROCESSED;
}
int lv_is_visible(const struct logical_volume *lv)
{
if (lv->status & SNAPSHOT)
return 0;
if (lv_is_cow(lv)) {
if (lv_is_virtual_origin(origin_from_cow(lv)))
return 1;
return lv_is_visible(origin_from_cow(lv));
}
return lv->status & VISIBLE_LV ? 1 : 0;
}
static int _lvdisplay_single(struct cmd_context *cmd, struct logical_volume *lv,
void *handle)
{
if (!arg_count(cmd, all_ARG) && !lv_is_visible(lv))
return ECMD_PROCESSED;
if (arg_count(cmd, colon_ARG))
lvdisplay_colons(lv);
else {
lvdisplay_full(cmd, lv, handle);
if (arg_count(cmd, maps_ARG))
lvdisplay_segments(lv);
}
return ECMD_PROCESSED;
}
/* Check if given LV is usable as snapshot origin LV */
int validate_snapshot_origin(const struct logical_volume *origin_lv)
{
const char *err = NULL; /* For error string */
if (lv_is_cow(origin_lv))
err = "snapshots";
else if (lv_is_locked(origin_lv))
err = "locked volumes";
else if (lv_is_pvmove(origin_lv))
err = "pvmoved volumes";
else if (!lv_is_visible(origin_lv))
err = "hidden volumes";
else if (lv_is_merging_origin(origin_lv))
err = "an origin that has a merging snapshot";
else if (lv_is_cache_type(origin_lv) && !lv_is_cache(origin_lv))
err = "cache type volumes";
else if (lv_is_thin_type(origin_lv) && !lv_is_thin_volume(origin_lv))
err = "thin pool type volumes";
else if (lv_is_mirror_type(origin_lv)) {
if (!lv_is_mirror(origin_lv))
err = "mirror subvolumes";
else {
log_warn("WARNING: Snapshots of mirrors can deadlock under rare device failures.");
log_warn("WARNING: Consider using the raid1 mirror type to avoid this.");
log_warn("WARNING: See global/mirror_segtype_default in lvm.conf.");
}
} else if (lv_is_raid_type(origin_lv) && !lv_is_raid(origin_lv))
err = "raid subvolumes";
if (err) {
log_error("Snapshots of %s are not supported.", err);
return 0;
}
if (vg_is_clustered(origin_lv->vg) && lv_is_active(origin_lv) &&
!lv_is_active_exclusive_locally(origin_lv)) {
log_error("Snapshot origin must be active exclusively.");
return 0;
}
return 1;
}
int lv_is_visible(const struct logical_volume *lv)
{
if (lv_is_historical(lv))
return 1;
if (lv_is_snapshot(lv))
return 0;
if (lv_is_cow(lv)) {
if (lv_is_virtual_origin(origin_from_cow(lv)))
return 1;
if (lv_is_merging_cow(lv))
return 0;
return lv_is_visible(origin_from_cow(lv));
}
return lv->status & VISIBLE_LV ? 1 : 0;
}
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);
}
static void
update_with_variant (GPid pid,
GVariant *info,
GError *error,
gpointer user_data)
{
struct UpdateData *data = user_data;
StorageVolumeGroup *self = data->self;
GVariantIter *iter;
GHashTableIter volume_iter;
gpointer key, value;
GHashTable *new_lvs;
gboolean needs_polling = FALSE;
StorageDaemon *daemon;
gchar *path;
daemon = storage_daemon_get ();
if (!error)
volume_group_update_props (self, info, &needs_polling);
/* After basic props, publish group, if not already done */
if (self->need_publish)
{
self->need_publish = FALSE;
path = storage_util_build_object_path ("/org/freedesktop/UDisks2/lvm",
storage_volume_group_get_name (self), NULL);
storage_daemon_publish (daemon, path, FALSE, self);
g_free (path);
}
if (error)
{
g_message ("Failed to update LVM volume group %s: %s",
storage_volume_group_get_name (self), error->message);
g_object_unref (self);
return;
}
if (self->info && g_variant_equal (self->info, info))
{
g_debug ("%s updated without changes", self->name);
g_object_unref (self);
return;
}
if (self->info)
g_variant_unref (self->info);
self->info = g_variant_ref (info);
new_lvs = g_hash_table_new (g_str_hash, g_str_equal);
if (g_variant_lookup (info, "lvs", "aa{sv}", &iter))
{
GVariant *lv_info = NULL;
while (g_variant_iter_loop (iter, "@a{sv}", &lv_info))
{
const gchar *name;
StorageLogicalVolume *volume;
g_variant_lookup (lv_info, "name", "&s", &name);
update_operations (name, lv_info, &needs_polling);
if (lv_is_pvmove_volume (name))
needs_polling = TRUE;
if (!lv_is_visible (name))
continue;
volume = g_hash_table_lookup (self->logical_volumes, name);
if (volume == NULL)
{
volume = storage_logical_volume_new (self, name);
storage_logical_volume_update (volume, self, lv_info, &needs_polling);
g_hash_table_insert (self->logical_volumes, g_strdup (name), g_object_ref (volume));
}
else
storage_logical_volume_update (volume, self, lv_info, &needs_polling);
g_hash_table_insert (new_lvs, (gchar *)name, volume);
}
g_variant_iter_free (iter);
}
g_hash_table_iter_init (&volume_iter, self->logical_volumes);
while (g_hash_table_iter_next (&volume_iter, &key, &value))
{
const gchar *name = key;
StorageLogicalVolume *volume = value;
if (!g_hash_table_contains (new_lvs, name))
{
/* Volume unpublishes itself */
g_object_run_dispose (G_OBJECT (volume));
g_hash_table_iter_remove (&volume_iter);
}
}
lvm_volume_group_set_needs_polling (LVM_VOLUME_GROUP (self), needs_polling);
/* Update physical volumes. */
g_hash_table_remove_all (self->physical_volumes);
if (g_variant_lookup (info, "pvs", "aa{sv}", &iter))
{
const gchar *name;
GVariant *pv_info;
while (g_variant_iter_next (iter, "@a{sv}", &pv_info))
{
if (g_variant_lookup (pv_info, "device", "&s", &name))
g_hash_table_insert (self->physical_volumes, g_strdup (name), pv_info);
else
g_variant_unref (pv_info);
}
}
/* Make sure above is published before updating blocks to point at volume group */
update_all_blocks (self);
if (data->done)
data->done (self, data->done_user_data);
g_hash_table_destroy (new_lvs);
g_object_unref (self);
g_free (data);
}
