tests: test creating 20 device-mapper partitions (#803108)

* tests/t6004-dm-many-partitions.sh: Make sure > 17 partitions appear in
  device mapper.

1 files changed, 60 insertions, 0 deletions

diff --git a/tests/t6004-dm-many-partitions.sh b/tests/t6004-dm-many-partitions.sh
new file mode 100755
index 0000000..4d08e72
--- /dev/null
+++ b/tests/t6004-dm-many-partitions.sh
@@ -0,0 +1,60 @@
+#!/bin/sh
+# device-mapper: create many partitions
+# This would not create partitions > 16 when using device-mapper
+
+# Copyright (C) 2012 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../parted
+
+require_root_
+(dmsetup --help) > /dev/null 2>&1 || skip_test_ "No dmsetup installed"
+
+ss=$sector_size_
+ns=300
+n_partitions=20
+start_sector=34
+loop_file=loop-file-$$
+dm_name=dm-test-$$
+
+cleanup_() {
+    dmsetup remove $dm_name
+    test -n "$dev" && losetup -d "$dev"
+    rm -f $loop_file;
+}
+
+# create a file large enough to hold a GPT partition table
+dd if=/dev/null of=$loop_file bs=$ss seek=$ns || framework_failure
+dev=$(losetup --show -f $loop_file) || framework_failure
+dmsetup create $dm_name --table "0 $ns linear $dev 0" || framework_failure
+
+cmd=
+for ((i=1; i<=$n_partitions; i+=1)); do
+  s=$((start_sector + i - 1))
+  cmd="$cmd mkpart p$i ${s}s ${s}s"
+done
+parted -m -a min -s /dev/mapper/$dm_name mklabel gpt $cmd > /dev/null 2>&1 || fail=1
+
+# Make sure all the partitions appeared under /dev/mapper/
+for ((i=1; i<=$n_partitions; i+=1)); do
+    if [ ! -e "/dev/mapper/${dm_name}p$i" ]; then
+        fail=1
+        break
+    fi
+    # remove the partitions as we go, otherwise cleanup won't work.
+    dmsetup remove /dev/mapper/${dm_name}p$i
+done
+
+Exit $fail