Function sync_error_list

freebsd/contrib/openzfs/module/zfs/spa_errlog.c:300–329

* Process a list of errors into the current on-disk log. */

 * Process a list of errors into the current on-disk log.
 */
static void
sync_error_list(spa_t *spa, avl_tree_t *t, uint64_t *obj, dmu_tx_t *tx)
{
	spa_error_entry_t *se;
	char buf[64];
	void *cookie;

	if (avl_numnodes(t) != 0) {
		/* create log if necessary */
		if (*obj == 0)
			*obj = zap_create(spa->spa_meta_objset,
			    DMU_OT_ERROR_LOG, DMU_OT_NONE,
			    0, tx);

		/* add errors to the current log */
		for (se = avl_first(t); se != NULL; se = AVL_NEXT(t, se)) {
			char *name = se->se_name ? se->se_name : "";

			bookmark_to_name(&se->se_bookmark, buf, sizeof (buf));

			(void) zap_update(spa->spa_meta_objset,
			    *obj, buf, 1, strlen(name) + 1, name, tx);
		}

		/* purge the error list */
		cookie = NULL;
		while ((se = avl_destroy_nodes(t, &cookie)) != NULL)
			kmem_free(se, sizeof (spa_error_entry_t));
	}
}

/*
 * Sync the error log out to disk.  This is a little tricky because the act of