pvscan: add --activate ay option (autoactivate)

Define auto_activation_handler that activates VGs/LVs automatically
based on the activation/auto_activation_volume_list (activating all
volumes by default if the list is not defined).

The autoactivation is done within the pvscan call in 69-dm-lvmetad.rules
that watches for udev events (device appearance/removal).

For now, this works for non-clustered and complete VGs only.

1 files changed, 27 insertions, 0 deletions

diff --git a/tools/pvscan.c b/tools/pvscan.c
index beba1743..a0408998 100644
--- a/tools/pvscan.c
+++ b/tools/pvscan.c
@@ -97,6 +97,20 @@ static void _pvscan_display_single(struct cmd_context *cmd,
 					   pv_pe_size(pv)));
 }
 
+static int _auto_activation_handler(struct volume_group *vg, int partial, int activate)
+{
+	/* TODO: add support for partial and clustered VGs */
+	if (partial || vg_is_clustered(vg))
+		return 1;
+
+	if (!vgchange_activate(vg->cmd, vg, activate)) {
+		log_error("%s: autoactivation failed.", vg->name);
+		return 0;
+	}
+
+	return 1;
+}
+
 static int _pvscan_lvmetad_all_devs(struct cmd_context *cmd, activation_handler handler)
 {
 	struct dev_iter *iter;
@@ -136,6 +150,14 @@ static int _pvscan_lvmetad(struct cmd_context *cmd, int argc, char **argv)
 	char *buf;
 	activation_handler handler = NULL;
 
+	if (arg_count(cmd, activate_ARG)) {
+		if (arg_uint_value(cmd, activate_ARG, CHANGE_AAY) != CHANGE_AAY) {
+			log_error("Only --activate ay allowed with pvscan.");
+			return 0;
+		}
+		handler = _auto_activation_handler;
+	}
+
 	if (arg_count(cmd, major_ARG) + arg_count(cmd, minor_ARG))
 		devno_args = 1;
 
@@ -241,6 +263,11 @@ int pvscan(struct cmd_context *cmd, int argc, char **argv)
 	if (arg_count(cmd, cache_ARG))
 		return _pvscan_lvmetad(cmd, argc, argv);
 
+	if (arg_count(cmd, activate_ARG)) {
+		log_error("--activate is only valid with --cache.");
+		return EINVALID_CMD_LINE;
+	}
+
 	if (arg_count(cmd, major_ARG) + arg_count(cmd, minor_ARG)) {
 		log_error("--major and --minor are only valid with --cache.");
 		return EINVALID_CMD_LINE;