lockd: fix error cases when built without lvmlockd

When lvm is built without lvmlockd support, vgcreate using a
shared lock type would succeed and create a local VG (the
--shared option was effectively ignored).  Make it fail.

Fix the same issue when using vgchange to change a VG to a
shared lock type.

Make the error messages consistent.

3 files changed, 23 insertions, 4 deletions

diff --git a/lib/locking/lvmlockd.h b/lib/locking/lvmlockd.h
index 2bd2fcc35..ffd6a9921 100644
--- a/lib/locking/lvmlockd.h
+++ b/lib/locking/lvmlockd.h
@@ -167,6 +167,14 @@ static inline int lockd_start_wait(struct cmd_context *cmd)
 
 static inline int lockd_gl_create(struct cmd_context *cmd, const char *def_mode, const char *vg_lock_type)
 {
+	/*
+	 * When lvm is built without lvmlockd support, creating a VG with
+	 * a shared lock type should fail.
+	 */
+	if (is_lockd_type(vg_lock_type)) {
+		log_error("Using a shared lock type requires lvmlockd.");
+		return 0;
+	}
 	return 1;
 }
 
@@ -220,6 +228,7 @@ static inline int lockd_free_lv(struct cmd_context *cmd, struct volume_group *vg
 
 static inline const char *lockd_running_lock_type(struct cmd_context *cmd)
 {
+	log_error("Using a shared lock type requires lvmlockd.");
 	return NULL;
 }
 
diff --git a/tools/toollib.c b/tools/toollib.c
index 7bbe897cf..5d5e4d68c 100644
--- a/tools/toollib.c
+++ b/tools/toollib.c
@@ -927,7 +927,7 @@ int vgcreate_params_set_from_args(struct cmd_context *cmd,
 	} else if (arg_is_set(cmd, shared_ARG)) {
 		if (use_lvmlockd) {
 			if (!(lock_type = lockd_running_lock_type(cmd))) {
-				log_error("Failed to detect a running lock manager to select lock_type.");
+				log_error("Failed to detect a running lock manager to select lock type.");
 				return 0;
 			}
 
@@ -936,7 +936,7 @@ int vgcreate_params_set_from_args(struct cmd_context *cmd,
 			return 0;
 
 		} else {
-			log_error("The --shared option requires lvmlockd (use_lvmlockd=1).");
+			log_error("Using a shared lock type requires lvmlockd.");
 			return 0;
 		}
 
@@ -961,13 +961,13 @@ int vgcreate_params_set_from_args(struct cmd_context *cmd,
 	case LOCK_TYPE_SANLOCK:
 	case LOCK_TYPE_DLM:
 		if (!use_lvmlockd) {
-			log_error("lock_type %s requires use_lvmlockd configuration setting", lock_type);
+			log_error("Using a shared lock type requires lvmlockd.");
 			return 0;
 		}
 		break;
 	case LOCK_TYPE_CLVM:
 		if (!use_clvmd) {
-			log_error("lock_type clvm requires locking_type 3 configuration setting");
+			log_error("Using clvm requires locking_type 3.");
 			return 0;
 		}
 		break;
diff --git a/tools/vgchange.c b/tools/vgchange.c
index 72a5c1ebb..961222206 100644
--- a/tools/vgchange.c
+++ b/tools/vgchange.c
@@ -1007,6 +1007,16 @@ static int _lockd_vgchange(struct cmd_context *cmd, int argc, char **argv)
 {
 	/* The default vg lock mode is ex, but these options only need sh. */
 
+	if (!lvmlockd_use() && arg_is_set(cmd, locktype_ARG)) {
+		log_error("Using lock type requires lvmlockd.");
+		return 0;
+	}
+
+	if (!lvmlockd_use() && (arg_is_set(cmd, lockstart_ARG) || arg_is_set(cmd, lockstop_ARG))) {
+		log_error("Using lock start and lock stop requires lvmlockd.");
+		return 0;
+	}
+
 	if (arg_is_set(cmd, activate_ARG) || arg_is_set(cmd, refresh_ARG))
 		cmd->lockd_vg_default_sh = 1;