[LTP] [PATCH] commands/unshare: Add new testcase to test unshare(1)
Xiao Yang
yangx.jy@cn.fujitsu.com
Thu Nov 2 10:34:57 CET 2017
Test unshare(1) command with some basic options.
Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
---
runtest/commands | 1 +
testcases/commands/unshare/Makefile | 22 +++++
testcases/commands/unshare/unshare01.sh | 150 ++++++++++++++++++++++++++++++++
3 files changed, 173 insertions(+)
create mode 100644 testcases/commands/unshare/Makefile
create mode 100755 testcases/commands/unshare/unshare01.sh
diff --git a/runtest/commands b/runtest/commands
index 00ae0d2..92df3af 100644
--- a/runtest/commands
+++ b/runtest/commands
@@ -43,3 +43,4 @@ insmod01 insmod01.sh
wc01 wc01.sh
keyctl01 keyctl01.sh
gdb01 gdb01.sh
+unshare01 unshare01.sh
diff --git a/testcases/commands/unshare/Makefile b/testcases/commands/unshare/Makefile
new file mode 100644
index 0000000..a175291
--- /dev/null
+++ b/testcases/commands/unshare/Makefile
@@ -0,0 +1,22 @@
+#
+# Copyright (c) 2017 FUJITSU LIMITED. All rights reserved.
+# Author: Xiao Yang <yangx.jy@cn.fujitsu.com>
+#
+# 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 2 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.
+#
+
+top_srcdir ?= ../../..
+
+include $(top_srcdir)/include/mk/env_pre.mk
+
+INSTALL_TARGETS := unshare01.sh
+
+include $(top_srcdir)/include/mk/generic_leaf_target.mk
diff --git a/testcases/commands/unshare/unshare01.sh b/testcases/commands/unshare/unshare01.sh
new file mode 100755
index 0000000..ba379df
--- /dev/null
+++ b/testcases/commands/unshare/unshare01.sh
@@ -0,0 +1,150 @@
+#!/bin/sh
+#
+# Copyright (c) 2017 FUJITSU LIMITED. All rights reserved.
+# Author: Xiao Yang <yangx.jy@cn.fujitsu.com>
+#
+# 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 2 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.
+#
+# Test unshare command with some basic options.
+# 1) If we run unshare with "--user", UID in the newly created user namespace
+# is set to 65534.
+# 2) If we run unshare with "--user", GID in the newly created user namespace
+# is set to 65534.
+# 3) If we run with "--user --map-root-user", UID in the newly created user
+# namespace is set to 0.
+# 4) If we run with "--user --map-root-user", GID in the newly created user
+# is set to 0.
+# 5) If we run with "--mount", mount and unmount events do not propagate to
+# its parent mount namespace.
+# 6) If we run with "--mount --propagation shared", mount and unmount events
+# propagate to its parent mount namespace.
+# 7) If we run with "--user --map-root-user --mount", mount and unmount events
+# do not propagate to its parent mount namespace.
+# 8) Even if we run with "--user --map-root-user --mount --propagation shared",
+# mount and unmount events do not propagate to its parent mount namespace
+# because the shared mount is reduced to a slave mount.
+#
+# Please see the following URL for detailed information:
+# http://man7.org/linux/man-pages/man7/user_namespaces.7.html
+# http://man7.org/linux/man-pages/man7/mount_namespaces.7.html
+#
+
+TST_CNT=8
+TST_SETUP=setup
+TST_CLEANUP=cleanup
+TST_TESTFUNC=do_test
+TST_NEEDS_ROOT=1
+TST_NEEDS_TMPDIR=1
+TST_NEEDS_CMDS="unshare id mount umount"
+. tst_test.sh
+
+max_userns_path="/proc/sys/user/max_user_namespaces"
+max_mntns_path="/proc/sys/user/max_mnt_namespaces"
+max_userns_zero=0
+max_mntns_zero=0
+
+setup()
+{
+ # On some distributions(e.g RHEL7.4), the default value of
+ # max_user_namespaces or max_mnt_namespaces is set to 0.
+ # We need to change the default value to run unshare command.
+ if [ -f "${max_userns_path}" ]; then
+ if [ $(cat "${max_userns_path}") -eq 0 ]; then
+ echo 1024 > "${max_userns_path}"
+ max_userns_zero=1
+ fi
+ fi
+
+ if [ -f "${max_mntns_path}" ]; then
+ if [ $(cat "${max_mntns_path}") -eq 0 ]; then
+ echo 1024 > "${max_mntns_path}"
+ max_mntns_zero=1
+ fi
+ fi
+
+ mkdir -p test_A test_B
+ touch test_A/A test_B/B
+}
+
+cleanup()
+{
+ # Restore the default value to 0.
+ [ ${max_userns_zero} -eq 1 ] && echo 0 > "${max_userns_path}"
+ [ ${max_mntns_zero} -eq 1 ] && echo 0 > "${max_mntns_zero}"
+}
+
+unshare_test()
+{
+ local unshare_opts=$1
+ local verify_cmd=$2
+ local exp_result=$3
+
+ local unshare_cmd="unshare ${unshare_opts} ${verify_cmd}"
+
+ eval ${unshare_cmd} > temp 2>&1
+ if [ $? -ne 0 ]; then
+ # unrecognized option or invalid option is returned if the
+ # option is not supported by unshare command(e.g. RHEL6).
+ # Invalid argument or Operation not permitted is returned
+ # if the feature is not supported by kernel(e.g. RHEL7).
+ grep -q -E "unrecognized option|invalid option|Invalid argument|Operation not permitted" temp
+ if [ $? -eq 0 ]; then
+ tst_res TCONF "${unshare_cmd} not supported."
+ else
+ tst_res TFAIL "${unshare_cmd} failed."
+ fi
+ return
+ fi
+
+ if [[ "${verify_cmd}" =~ 'id' ]]; then
+ if [ $(cat temp) -ne ${exp_result} ]; then
+ tst_res TFAIL "${unshare_cmd} got wrong uid/gid"
+ return
+ fi
+ fi
+
+ if [[ "${verify_cmd}" =~ 'mount' ]]; then
+ if [ "${exp_result}" = "unmounted" ]; then
+ if ls test_B | grep -q 'A'; then
+ tst_res TFAIL "${unshare_cmd} got bind info"
+ umount test_B
+ return
+ fi
+ else
+ if ! ls test_B | grep -q 'A'; then
+ tst_res TFAIL "${unshare_cmd} did not get bind info"
+ return
+ fi
+ umount test_B
+ fi
+ fi
+
+ tst_res TPASS "${unshare_cmd} succeeded as expected"
+}
+
+do_test()
+{
+ case $1 in
+ 1) unshare_test "--user" "id -u" "65534";;
+ 2) unshare_test "--user" "id -g" "65534";;
+ 3) unshare_test "--user --map-root-user" "id -u" "0";;
+ 4) unshare_test "--user --map-root-user" "id -g" "0";;
+ 5) unshare_test "--mount" "mount --bind test_A test_B" "unmounted";;
+ 6) unshare_test "--mount --propagation shared" \
+ "mount --bind test_A test_B" "mounted";;
+ 7) unshare_test "--user --map-root-user --mount" \
+ "mount --bind test_A test_B" "unmounted";;
+ 8) unshare_test "--user --map-root-user --mount --propagation shared" \
+ "mount --bind test_A test_B" "unmounted";;
+ esac
+}
+
+tst_run
--
1.8.3.1
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