From 718d718a734e79bad0b9f8a264219b238fabaf44 Mon Sep 17 00:00:00 2001
From: George Wilson <George.Wilson@Sun.COM>
Date: Thu, 21 May 2009 16:24:49 -0700
Subject: [PATCH] 6843568 ztest fails when calling dmu_objset_destroy()

---
 usr/src/cmd/ztest/ztest.c | 78 ++++++++++++++++++++++++++---------------------
 1 file changed, 44 insertions(+), 34 deletions(-)

diff --git a/usr/src/cmd/ztest/ztest.c b/usr/src/cmd/ztest/ztest.c
index dc5907b0c4..cb59116d42 100644
--- a/usr/src/cmd/ztest/ztest.c
+++ b/usr/src/cmd/ztest/ztest.c
@@ -1443,6 +1443,42 @@ ztest_dmu_snapshot_create_destroy(ztest_args_t *za)
 }
 
 /*
+ * Cleanup non-standard snapshots and clones.
+ */
+void
+ztest_dsl_dataset_cleanup(char *osname, uint64_t curval)
+{
+	char snap1name[100];
+	char clone1name[100];
+	char snap2name[100];
+	char clone2name[100];
+	char snap3name[100];
+	int error;
+
+	(void) snprintf(snap1name, 100, "%s@s1_%llu", osname, curval);
+	(void) snprintf(clone1name, 100, "%s/c1_%llu", osname, curval);
+	(void) snprintf(snap2name, 100, "%s@s2_%llu", clone1name, curval);
+	(void) snprintf(clone2name, 100, "%s/c2_%llu", osname, curval);
+	(void) snprintf(snap3name, 100, "%s@s3_%llu", clone1name, curval);
+
+	error = dmu_objset_destroy(clone2name);
+	if (error && error != ENOENT)
+		fatal(0, "dmu_objset_destroy(%s) = %d", clone2name, error);
+	error = dmu_objset_destroy(snap3name);
+	if (error && error != ENOENT)
+		fatal(0, "dmu_objset_destroy(%s) = %d", snap3name, error);
+	error = dmu_objset_destroy(snap2name);
+	if (error && error != ENOENT)
+		fatal(0, "dmu_objset_destroy(%s) = %d", snap2name, error);
+	error = dmu_objset_destroy(clone1name);
+	if (error && error != ENOENT)
+		fatal(0, "dmu_objset_destroy(%s) = %d", clone1name, error);
+	error = dmu_objset_destroy(snap1name);
+	if (error && error != ENOENT)
+		fatal(0, "dmu_objset_destroy(%s) = %d", snap1name, error);
+}
+
+/*
  * Verify dsl_dataset_promote handles EBUSY
  */
 void
@@ -1458,35 +1494,19 @@ ztest_dsl_dataset_promote_busy(ztest_args_t *za)
 	char clone2name[100];
 	char snap3name[100];
 	char osname[MAXNAMELEN];
-	uint64_t curval;
-
-	curval = za->za_instance;
+	uint64_t curval = za->za_instance;
 
 	(void) rw_rdlock(&ztest_shared->zs_name_lock);
 
 	dmu_objset_name(os, osname);
+	ztest_dsl_dataset_cleanup(osname, curval);
+
 	(void) snprintf(snap1name, 100, "%s@s1_%llu", osname, curval);
 	(void) snprintf(clone1name, 100, "%s/c1_%llu", osname, curval);
 	(void) snprintf(snap2name, 100, "%s@s2_%llu", clone1name, curval);
 	(void) snprintf(clone2name, 100, "%s/c2_%llu", osname, curval);
 	(void) snprintf(snap3name, 100, "%s@s3_%llu", clone1name, curval);
 
-	error = dmu_objset_destroy(clone2name);
-	if (error != 0 && error != ENOENT)
-		fatal(0, "dmu_objset_destroy() = %d", error);
-	error = dmu_objset_destroy(snap3name);
-	if (error != 0 && error != ENOENT)
-		fatal(0, "dmu_objset_destroy() = %d", error);
-	error = dmu_objset_destroy(snap2name);
-	if (error != 0 && error != ENOENT)
-		fatal(0, "dmu_objset_destroy() = %d", error);
-	error = dmu_objset_destroy(clone1name);
-	if (error != 0 && error != ENOENT)
-		fatal(0, "dmu_objset_destroy() = %d", error);
-	error = dmu_objset_destroy(snap1name);
-	if (error != 0 && error != ENOENT)
-		fatal(0, "dmu_objset_destroy() = %d", error);
-
 	error = dmu_objset_snapshot(osname, strchr(snap1name, '@')+1,
 	    NULL, FALSE);
 	if (error && error != EEXIST) {
@@ -1559,21 +1579,7 @@ ztest_dsl_dataset_promote_busy(ztest_args_t *za)
 	dsl_dataset_disown(ds, FTAG);
 
 out:
-	error = dmu_objset_destroy(clone2name);
-	if (error && error != ENOENT)
-		fatal(0, "dmu_objset_destroy(%s) = %d", clone2name, error);
-	error = dmu_objset_destroy(snap3name);
-	if (error && error != ENOENT)
-		fatal(0, "dmu_objset_destroy(%s) = %d", snap3name, error);
-	error = dmu_objset_destroy(snap2name);
-	if (error && error != ENOENT)
-		fatal(0, "dmu_objset_destroy(%s) = %d", snap2name, error);
-	error = dmu_objset_destroy(clone1name);
-	if (error && error != ENOENT)
-		fatal(0, "dmu_objset_destroy(%s) = %d", clone1name, error);
-	error = dmu_objset_destroy(snap1name);
-	if (error && error != ENOENT)
-		fatal(0, "dmu_objset_destroy(%s) = %d", snap1name, error);
+	ztest_dsl_dataset_cleanup(osname, curval);
 
 	(void) rw_unlock(&ztest_shared->zs_name_lock);
 }
@@ -3691,6 +3697,10 @@ ztest_run(char *pool)
 		(void) snprintf(name, 100, "%s/%s_%d", pool, pool, d);
 		if (zopt_verbose >= 3)
 			(void) printf("Destroying %s to free up space\n", name);
+
+		/* Cleanup any non-standard clones and snapshots */
+		ztest_dsl_dataset_cleanup(name, za[d].za_instance);
+
 		(void) dmu_objset_find(name, ztest_destroy_cb, &za[d],
 		    DS_FIND_SNAPSHOTS | DS_FIND_CHILDREN);
 		(void) rw_unlock(&ztest_shared->zs_name_lock);
-- 
2.11.4.GIT