mirror of https://github.com/proxmox/mirror_qemu
iotests/fuse-allow-other: Test allow-other
Signed-off-by: Max Reitz <mreitz@redhat.com> Message-Id: <20210625142317.271673-7-mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>master
Max Reitz
Kevin Wolf
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f29add26d4
commit
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#!/usr/bin/env bash
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# group: rw
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#
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# Test FUSE exports' allow-other option
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#
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# Copyright (C) 2021 Red Hat, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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seq=$(basename "$0")
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echo "QA output created by $seq"
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_qemu
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_cleanup_test_img
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rm -f "$EXT_MP"
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ../common.rc
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. ../common.filter
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. ../common.qemu
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_supported_fmt generic
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_supported_proto file # We create the FUSE export manually
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sudo -n -u nobody true || \
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_notrun 'Password-less sudo as nobody required to test allow_other'
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# $1: Export ID
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# $2: Options (beyond the node-name and ID)
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# $3: Expected return value (defaults to 'return')
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# $4: Node to export (defaults to 'node-format')
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fuse_export_add()
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{
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allow_other_not_supported='option allow_other only allowed if'
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output=$(
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success_or_failure=yes _send_qemu_cmd $QEMU_HANDLE \
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"{'execute': 'block-export-add',
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'arguments': {
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'type': 'fuse',
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'id': '$1',
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'node-name': '${4:-node-format}',
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$2
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} }" \
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"${3:-return}" \
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"$allow_other_not_supported" \
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| _filter_imgfmt
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)
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if echo "$output" | grep -q "$allow_other_not_supported"; then
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# Shut down qemu gracefully so it can unmount the export
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_send_qemu_cmd $QEMU_HANDLE \
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"{'execute': 'quit'}" \
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'return'
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wait=yes _cleanup_qemu
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_notrun "allow_other not supported"
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fi
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echo "$output"
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}
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EXT_MP="$TEST_DIR/fuse-export"
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_make_test_img 64k
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touch "$EXT_MP"
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echo
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echo '=== Test permissions ==='
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# $1: allow-other value ('on'/'off'/'auto')
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run_permission_test()
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{
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_launch_qemu \
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-blockdev \
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"$IMGFMT,node-name=node-format,file.driver=file,file.filename=$TEST_IMG"
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_send_qemu_cmd $QEMU_HANDLE \
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"{'execute': 'qmp_capabilities'}" \
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'return'
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fuse_export_add 'export' \
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"'mountpoint': '$EXT_MP',
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'allow-other': '$1'"
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# Should always work
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echo '(Removing all permissions)'
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chmod 000 "$EXT_MP" 2>&1 | _filter_testdir | _filter_imgfmt
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stat -c 'Permissions post-chmod: %a' "$EXT_MP"
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# Should always work
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echo '(Granting u+r)'
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chmod u+r "$EXT_MP" 2>&1 | _filter_testdir | _filter_imgfmt
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stat -c 'Permissions post-chmod: %a' "$EXT_MP"
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# Should only work with allow-other: Otherwise, no permissions can be
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# granted to the group or others
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echo '(Granting read permissions for everyone)'
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chmod 444 "$EXT_MP" 2>&1 | _filter_testdir | _filter_imgfmt
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stat -c 'Permissions post-chmod: %a' "$EXT_MP"
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echo 'Doing operations as nobody:'
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# Change to TEST_DIR, so nobody will not have to attempt a lookup
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pushd "$TEST_DIR" >/dev/null
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# This is already prevented by the permissions (without allow-other, FUSE
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# exports always have o-r), but test it anyway
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sudo -n -u nobody cat fuse-export >/dev/null
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# If the only problem were the lack of permissions, we should still be able
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# to stat the export as nobody; it should not work without allow-other,
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# though
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sudo -n -u nobody \
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stat -c 'Permissions seen by nobody: %a' fuse-export 2>&1 \
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| _filter_imgfmt
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# To prove the point, revoke read permissions for others and try again
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chmod o-r fuse-export 2>&1 | _filter_testdir | _filter_imgfmt
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# Should fail
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sudo -n -u nobody cat fuse-export >/dev/null
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# Should work with allow_other
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sudo -n -u nobody \
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stat -c 'Permissions seen by nobody: %a' fuse-export 2>&1 \
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| _filter_imgfmt
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popd >/dev/null
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_send_qemu_cmd $QEMU_HANDLE \
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"{'execute': 'quit'}" \
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'return'
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wait=yes _cleanup_qemu
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}
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# 'auto' should behave exactly like 'on', because 'on' tests that
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# allow_other works (otherwise, this test is skipped)
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for ao in off on auto; do
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echo
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echo "--- allow-other=$ao ---"
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run_permission_test "$ao"
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done
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# success, all done
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echo "*** done"
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rm -f $seq.full
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status=0
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@ -0,0 +1,88 @@
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QA output created by fuse-allow-other
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=65536
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=== Test permissions ===
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--- allow-other=off ---
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{'execute': 'qmp_capabilities'}
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{"return": {}}
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{'execute': 'block-export-add',
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'arguments': {
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'type': 'fuse',
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'id': 'export',
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'node-name': 'node-format',
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'mountpoint': 'TEST_DIR/fuse-export',
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'allow-other': 'off'
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} }
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{"return": {}}
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(Removing all permissions)
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Permissions post-chmod: 0
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(Granting u+r)
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Permissions post-chmod: 400
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(Granting read permissions for everyone)
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chmod: changing permissions of 'TEST_DIR/fuse-export': Operation not permitted
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Permissions post-chmod: 400
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Doing operations as nobody:
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cat: fuse-export: Permission denied
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stat: cannot statx 'fuse-export': Permission denied
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cat: fuse-export: Permission denied
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stat: cannot statx 'fuse-export': Permission denied
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{'execute': 'quit'}
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{"return": {}}
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{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false, "reason": "host-qmp-quit"}}
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{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_EXPORT_DELETED", "data": {"id": "export"}}
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--- allow-other=on ---
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{'execute': 'qmp_capabilities'}
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{"return": {}}
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{'execute': 'block-export-add',
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'arguments': {
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'type': 'fuse',
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'id': 'export',
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'node-name': 'node-format',
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'mountpoint': 'TEST_DIR/fuse-export',
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'allow-other': 'on'
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} }
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{"return": {}}
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(Removing all permissions)
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Permissions post-chmod: 0
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(Granting u+r)
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Permissions post-chmod: 400
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(Granting read permissions for everyone)
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Permissions post-chmod: 444
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Doing operations as nobody:
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Permissions seen by nobody: 444
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cat: fuse-export: Permission denied
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Permissions seen by nobody: 440
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{'execute': 'quit'}
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{"return": {}}
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{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false, "reason": "host-qmp-quit"}}
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{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_EXPORT_DELETED", "data": {"id": "export"}}
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--- allow-other=auto ---
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{'execute': 'qmp_capabilities'}
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{"return": {}}
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{'execute': 'block-export-add',
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'arguments': {
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'type': 'fuse',
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'id': 'export',
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'node-name': 'node-format',
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'mountpoint': 'TEST_DIR/fuse-export',
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'allow-other': 'auto'
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} }
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{"return": {}}
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(Removing all permissions)
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Permissions post-chmod: 0
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(Granting u+r)
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Permissions post-chmod: 400
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(Granting read permissions for everyone)
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Permissions post-chmod: 444
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Doing operations as nobody:
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Permissions seen by nobody: 444
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cat: fuse-export: Permission denied
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Permissions seen by nobody: 440
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{'execute': 'quit'}
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{"return": {}}
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{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false, "reason": "host-qmp-quit"}}
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{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_EXPORT_DELETED", "data": {"id": "export"}}
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*** done
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