pvmove: in fork mode destroy bcache in child

When pvmove was run in background mode and forks
instead of using lvmpolld, the child pvmove process
was not clearing the bcache from the parent, so all
the aio ops in the child were failing.

1 files changed, 7 insertions, 2 deletions

diff --git a/tools/polldaemon.c b/tools/polldaemon.c
index 83f0424dc..5b5f57feb 100644
--- a/tools/polldaemon.c
+++ b/tools/polldaemon.c
@@ -377,8 +377,6 @@ static void _poll_for_all_vgs(struct cmd_context *cmd,
 		process_each_vg(cmd, 0, NULL, NULL, NULL, READ_FOR_UPDATE, 0, handle, _poll_vg);
 		if (!parms->outstanding_count)
 			break;
-		if (parms->interval)
-			dev_close_all();
 		_nanosleep(parms->interval, 1);
 	}
 }
@@ -618,6 +616,12 @@ static int _poll_daemon(struct cmd_context *cmd, struct poll_operation_id *id,
 	/*
 	 * Process one specific task or all incomplete tasks?
 	 */
+
+	/* clear lvmcache/bcache/fds from the parent */
+	lvmcache_destroy(cmd, 1, 0);
+	label_scan_destroy(cmd);
+	dev_close_all();
+
 	if (id) {
 		if (!wait_for_single_lv(cmd, id, parms)) {
 			stack;
@@ -626,6 +630,7 @@ static int _poll_daemon(struct cmd_context *cmd, struct poll_operation_id *id,
 	} else {
 		if (!parms->interval)
 			parms->interval = find_config_tree_int(cmd, activation_polling_interval_CFG, NULL);
+
 		if (!(handle = init_processing_handle(cmd, NULL))) {
 			log_error("Failed to initialize processing handle.");
 			ret = ECMD_FAILED;