1 files changed, 57 insertions, 0 deletions
diff --git a/tests/sys/geom/class/mirror/9_test.sh b/tests/sys/geom/class/mirror/9_test.sh
new file mode 100644
index 000000000000..6bcb26860615
--- /dev/null
+++ b/tests/sys/geom/class/mirror/9_test.sh
@@ -0,0 +1,57 @@
+#!/bin/sh
+
+# Regression test for r306743.
+
+. `dirname $0`/conf.sh
+
+echo 1..1
+
+ddbs=2048
+m1=`mktemp $base.XXXXXX` || exit 1
+m2=`mktemp $base.XXXXXX` || exit 1
+m3=`mktemp $base.XXXXXX` || exit 1
+
+dd if=/dev/zero of=$m1 bs=$ddbs count=1024 >/dev/null 2>&1
+dd if=/dev/zero of=$m2 bs=$ddbs count=1024 >/dev/null 2>&1
+dd if=/dev/zero of=$m3 bs=$ddbs count=1024 >/dev/null 2>&1
+
+attach_md us0 -t vnode -f $m1 || exit 1
+attach_md us1 -t vnode -f $m2 || exit 1
+attach_md us2 -t vnode -f $m3 || exit 1
+
+gmirror label $name /dev/$us0 /dev/$us1 || exit 1
+devwait
+
+# Break one of the mirrors by forcing a single metadata write error.
+# When dd closes the mirror provider, gmirror will attempt to mark the mirrors
+# clean, and will kick one of the mirrors out upon hitting the error.
+sysctl debug.fail_point.g_mirror_metadata_write="1*return(5)[pid $(gmirror_worker_pid)]" || exit 1
+dd if=/dev/random of=/dev/mirror/$name bs=$ddbs count=1 >/dev/null 2>&1
+sysctl debug.fail_point.g_mirror_metadata_write='off' || exit 1
+
+# Replace the broken mirror, and then stop the gmirror.
+gmirror forget $name || exit 1
+gmirror insert $name /dev/$us2 || exit 1
+syncwait
+gmirror stop $name || exit 1
+
+# Restart the gmirror on the original two mirrors. One of them is broken,
+# so we should end up with a degraded gmirror.
+gmirror activate $name /dev/$us0 /dev/$us1 || exit 1
+devwait
+dd if=/dev/random of=/dev/mirror/$name bs=$ddbs count=1 >/dev/null 2>&1
+
+# Re-add the replacement mirror and verify the two mirrors are synchronized.
+# Destroy the gmirror first so that the mirror metadata is wiped; otherwise
+# the metadata blocks will fail the comparison. It would be nice to do this
+# with a "gmirror verify" command instead.
+gmirror activate $name /dev/$us2 || exit 1
+syncwait
+gmirror destroy $name || exit 1
+if cmp -s $m1 $m3; then
+	echo "ok 1"
+else
+	echo "not ok 1"
+fi
+
+rm -f $m1 $m2 $m3