1 files changed, 139 insertions, 0 deletions
diff --git a/tests/sys/geom/class/mirror/component_selection.sh b/tests/sys/geom/class/mirror/component_selection.sh
new file mode 100755
index 000000000000..b5c8cec78c61
--- /dev/null
+++ b/tests/sys/geom/class/mirror/component_selection.sh
@@ -0,0 +1,139 @@
+
+ATF_TEST=true
+class=mirror
+. $(atf_get_srcdir)/conf.sh
+
+atf_test_case run_latest_genid cleanup
+run_latest_genid_head()
+{
+	atf_set "descr" \
+	    "Ensure that we properly select components (latest genid) during STARTING."
+	atf_set "require.user" "root"
+}
+run_latest_genid_body()
+{
+	geom_atf_test_setup
+	if ! error_message=$(geom_load_class_if_needed nop); then
+		atf_skip "$error_message"
+	fi
+
+	f1=$(mktemp ${base}.XXXXXX)
+	f2=$(mktemp ${base}.XXXXXX)
+	f3=$(mktemp ${base}.XXXXXX)
+	rnd1=$(mktemp ${base}.XXXXXX)
+	rnd2=$(mktemp ${base}.XXXXXX)
+
+	atf_check truncate -s 2M $f1
+	atf_check truncate -s 2M $f2
+	atf_check truncate -s 2M $f3
+	dd if=/dev/urandom bs=512 count=1 of="$rnd1"
+	dd if=/dev/urandom bs=512 count=1 of="$rnd2"
+
+	attach_md md1 -t vnode -f ${f1}
+	attach_md md2 -t vnode -f ${f2}
+	attach_md md3 -t vnode -f ${f3}
+
+	# Use a gnop for md1 just for consistency; it's not used for anything.
+	atf_check gnop create $md1
+	atf_check gnop create $md2
+	atf_check gnop create $md3
+	# Hardcode component names so that the non-.nop device isn't tasted
+	# instead.
+	atf_check gmirror label -h $name ${md1}.nop
+	devwait
+
+	atf_check gmirror insert -h $name ${md2}.nop
+	atf_check gmirror insert -h $name ${md3}.nop
+	syncwait
+
+	# Fail mirror 3, writing known contents to mirror 1+2 block 1
+	atf_check -s exit:0 -e empty -o empty \
+	    gnop configure -w 100 ${md3}.nop
+	atf_check -s exit:0 dd if="$rnd1" bs=512 count=1 oseek=1 conv=notrunc \
+	    of=/dev/mirror/$name status=none
+
+	disconnectwait nop "${md3}.nop"
+
+	# Should have two mirrors remaining after md3 was evicted
+	atf_check [ $(gmirror status -s $name | wc -l) -eq 2 ]
+	atf_check -s exit:0 -o match:"DEGRADED  ${md1}.nop \(ACTIVE\)" \
+		gmirror status -s $name
+	atf_check -s exit:0 -o match:"DEGRADED  ${md2}.nop \(ACTIVE\)" \
+		gmirror status -s $name
+
+	# Repeat:
+	# Fail mirror 2, writing known contents to mirror 1 block 2
+	atf_check -s exit:0 -e empty -o empty \
+	    gnop configure -w 100 ${md2}.nop
+	atf_check -s exit:0 dd if="$rnd2" bs=512 count=2 oseek=1 conv=notrunc \
+	    of=/dev/mirror/$name status=none
+
+	disconnectwait nop "${md2}.nop"
+
+	# Should have one mirror remaining after md2 was evicted
+	atf_check [ $(gmirror status -s $name | wc -l) -eq 1 ]
+	atf_check -s exit:0 -o match:"DEGRADED  ${md1}.nop \(ACTIVE\)" \
+		gmirror status -s $name
+
+	# Stop the mirror and remove the pieces so gmirror can't see them.
+	atf_check gmirror stop $name
+	atf_check gnop destroy ${md1}.nop
+	atf_check gnop destroy ${md2}.nop
+	atf_check gnop destroy ${md3}.nop
+
+	# Rebuild; spin up "disk" with lowest genid
+	atf_check gnop create $md3
+	md3gen=$(gmirror dump /dev/${md3}.nop | grep genid | cut -d: -f2)
+	# Assert gmirror is referencing this component for now:
+	atf_check [ $(consumerrefs nop ${md3}.nop) = "r1w1e1" ]
+
+	# Adding newer genid should kick out old component
+	atf_check gnop create $md2
+	md2gen=$(gmirror dump /dev/${md2}.nop | grep genid | cut -d: -f2)
+	atf_check [ $md2gen -gt $md3gen ]
+
+	disconnectwait nop "${md3}.nop"
+
+	# Can't test this because 'status' doesn't exist until RUNNING:
+	#atf_check [ $(gmirror status -s $name | wc -l) -eq 1 ]
+	# But as a substitute, assert gmirror has dropped reference to staler
+	# component in favor of newer component:
+	atf_check [ $(consumerrefs nop ${md2}.nop) = "r1w1e1" ]
+
+	# ditto
+	atf_check gnop create $md1
+	md1gen=$(gmirror dump /dev/${md1}.nop | grep genid | cut -d: -f2)
+	atf_check [ $md1gen -gt $md2gen ]
+
+	disconnectwait nop "${md2}.nop"
+
+	# Assert gmirror has dropped reference to stale component in favor of
+	# newer component:
+	atf_check [ $(consumerrefs nop ${md1}.nop) = "r1w1e1" ]
+
+	# gmirror won't start the mirror automatically with only one component
+	# ($md0) of configured three, so this waits out the
+	# kern.geom.mirror.timeout:
+	devwait
+
+	atf_check [ $(gmirror status -s $name | wc -l) -eq 1 ]
+	atf_check -s exit:0 -o match:"DEGRADED  ${md1}.nop \(ACTIVE\)" \
+		gmirror status -s $name
+}
+run_latest_genid_cleanup()
+{
+	. $(atf_get_srcdir)/conf.sh
+
+	if [ -f "$TEST_MDS_FILE" ]; then
+		while read test_md; do
+			echo "# Removing test gnop: ${test_md}.nop"
+			gnop destroy -f "${test_md}.nop" 2>/dev/null || :
+		done < "$TEST_MDS_FILE"
+	fi
+	gmirror_test_cleanup
+}
+
+atf_init_test_cases()
+{
+	atf_add_test_case run_latest_genid
+}