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1#
2# Copyright OpenEmbedded Contributors
3#
4# SPDX-License-Identifier: MIT
5#
6
7from oeqa.selftest.case import OESelftestTestCase
8from oeqa.utils.commands import bitbake, runqemu
9from oeqa.core.decorator import OETestTag
10from oeqa.core.decorator.data import skipIfNotMachine
11
12def getline_qemu(out, line):
13 for l in out.split('\n'):
14 if line in l:
15 return l
16
17def getline(res, line):
18 return getline_qemu(res.output, line)
19
20class OverlayFSTests(OESelftestTestCase):
21 """Overlayfs class usage tests"""
22
23 def add_overlay_conf_to_machine(self):
24 machine_inc = """
25OVERLAYFS_MOUNT_POINT[mnt-overlay] = "/mnt/overlay"
26"""
27 self.set_machine_config(machine_inc)
28
29 def test_distro_features_missing(self):
30 """
31 Summary: Check that required DISTRO_FEATURES are set
32 Expected: Fail when either systemd or overlayfs are not in DISTRO_FEATURES
33 Author: Vyacheslav Yurkov <uvv.mail@gmail.com>
34 """
35
36 config = """
37IMAGE_INSTALL:append = " overlayfs-user"
38"""
39 overlayfs_recipe_append = """
40inherit overlayfs
41"""
42 self.write_config(config)
43 self.add_overlay_conf_to_machine()
44 self.write_recipeinc('overlayfs-user', overlayfs_recipe_append)
45
46 res = bitbake('core-image-minimal', ignore_status=True)
47 line = getline(res, "overlayfs-user was skipped: missing required distro features")
48 self.assertTrue("overlayfs" in res.output, msg=res.output)
49 self.assertTrue("systemd" in res.output, msg=res.output)
50 self.assertTrue("ERROR: Required build target 'core-image-minimal' has no buildable providers." in res.output, msg=res.output)
51
52 def test_not_all_units_installed(self):
53 """
54 Summary: Test QA check that we have required mount units in the image
55 Expected: Fail because mount unit for overlay partition is not installed
56 Author: Vyacheslav Yurkov <uvv.mail@gmail.com>
57 """
58
59 config = """
60IMAGE_INSTALL:append = " overlayfs-user"
61DISTRO_FEATURES:append = " systemd overlayfs usrmerge"
62"""
63
64 self.write_config(config)
65 self.add_overlay_conf_to_machine()
66
67 res = bitbake('core-image-minimal', ignore_status=True)
68 line = getline(res, " Mount path /mnt/overlay not found in fstab and unit mnt-overlay.mount not found in systemd unit directories")
69 self.assertTrue(line and line.startswith("WARNING:"), msg=res.output)
70 line = getline(res, "Not all mount paths and units are installed in the image")
71 self.assertTrue(line and line.startswith("ERROR:"), msg=res.output)
72
73 def test_not_all_units_installed_but_qa_skipped(self):
74 """
75 Summary: Test skipping the QA check
76 Expected: Image is created successfully
77 Author: Claudius Heine <ch@denx.de>
78 """
79
80 config = """
81IMAGE_INSTALL:append = " overlayfs-user"
82DISTRO_FEATURES:append = " systemd overlayfs usrmerge"
83OVERLAYFS_QA_SKIP[mnt-overlay] = "mount-configured"
84"""
85
86 self.write_config(config)
87 self.add_overlay_conf_to_machine()
88
89 bitbake('core-image-minimal')
90
91 def test_mount_unit_not_set(self):
92 """
93 Summary: Test whether mount unit was set properly
94 Expected: Fail because mount unit was not set
95 Author: Vyacheslav Yurkov <uvv.mail@gmail.com>
96 """
97
98 config = """
99IMAGE_INSTALL:append = " overlayfs-user"
100DISTRO_FEATURES:append = " systemd overlayfs usrmerge"
101"""
102
103 self.write_config(config)
104
105 res = bitbake('core-image-minimal', ignore_status=True)
106 line = getline(res, "A recipe uses overlayfs class but there is no OVERLAYFS_MOUNT_POINT set in your MACHINE configuration")
107 self.assertTrue(line and line.startswith("Parsing recipes...ERROR:"), msg=res.output)
108
109 def test_wrong_mount_unit_set(self):
110 """
111 Summary: Test whether mount unit was set properly
112 Expected: Fail because not the correct flag used for mount unit
113 Author: Vyacheslav Yurkov <uvv.mail@gmail.com>
114 """
115
116 config = """
117IMAGE_INSTALL:append = " overlayfs-user"
118DISTRO_FEATURES:append = " systemd overlayfs usrmerge"
119"""
120
121 wrong_machine_config = """
122OVERLAYFS_MOUNT_POINT[usr-share-overlay] = "/usr/share/overlay"
123"""
124
125 self.write_config(config)
126 self.set_machine_config(wrong_machine_config)
127
128 res = bitbake('core-image-minimal', ignore_status=True)
129 line = getline(res, "Missing required mount point for OVERLAYFS_MOUNT_POINT[mnt-overlay] in your MACHINE configuration")
130 self.assertTrue(line and line.startswith("Parsing recipes...ERROR:"), msg=res.output)
131
132 def _test_correct_image(self, recipe, data):
133 """
134 Summary: Check that we can create an image when all parameters are
135 set correctly
136 Expected: Image is created successfully
137 Author: Vyacheslav Yurkov <uvv.mail@gmail.com>
138 """
139
140 config = """
141IMAGE_INSTALL:append = " overlayfs-user systemd-machine-units"
142DISTRO_FEATURES:append = " overlayfs"
143
144# Use systemd as init manager
145INIT_MANAGER = "systemd"
146
147# enable overlayfs in the kernel
148KERNEL_EXTRA_FEATURES:append = " features/overlayfs/overlayfs.scc"
149"""
150
151 overlayfs_recipe_append = """
152OVERLAYFS_WRITABLE_PATHS[mnt-overlay] += "/usr/share/another-overlay-mount"
153
154SYSTEMD_SERVICE:${PN} += " \
155 my-application.service \
156"
157
158do_install:append() {
159 install -d ${D}${systemd_system_unitdir}
160 cat <<EOT > ${D}${systemd_system_unitdir}/my-application.service
161[Unit]
162Description=Sample application start-up unit
163After=overlayfs-user-overlays.service
164Requires=overlayfs-user-overlays.service
165
166[Service]
167Type=oneshot
168ExecStart=/bin/true
169RemainAfterExit=true
170
171[Install]
172WantedBy=multi-user.target
173EOT
174}
175"""
176
177 self.write_config(config)
178 self.add_overlay_conf_to_machine()
179 self.write_recipeinc(recipe, data)
180 self.write_recipeinc('overlayfs-user', overlayfs_recipe_append)
181
182 bitbake('core-image-minimal')
183
184 with runqemu('core-image-minimal') as qemu:
185 # Check that application service started
186 status, output = qemu.run_serial("systemctl status my-application")
187 self.assertTrue("active (exited)" in output, msg=output)
188
189 # Check that overlay mounts are dependencies of our application unit
190 status, output = qemu.run_serial("systemctl list-dependencies my-application")
191 self.assertTrue("overlayfs-user-overlays.service" in output, msg=output)
192
193 status, output = qemu.run_serial("systemctl list-dependencies overlayfs-user-overlays")
194 self.assertTrue("usr-share-another\\x2doverlay\\x2dmount.mount" in output, msg=output)
195 self.assertTrue("usr-share-my\\x2dapplication.mount" in output, msg=output)
196
197 # Check that we have /mnt/overlay fs mounted as tmpfs and
198 # /usr/share/my-application as an overlay (see overlayfs-user recipe)
199 status, output = qemu.run_serial("/bin/mount -t tmpfs,overlay")
200
201 line = getline_qemu(output, "on /mnt/overlay")
202 self.assertTrue(line and line.startswith("tmpfs"), msg=output)
203
204 line = getline_qemu(output, "upperdir=/mnt/overlay/upper/usr/share/my-application")
205 self.assertTrue(line and line.startswith("overlay"), msg=output)
206
207 line = getline_qemu(output, "upperdir=/mnt/overlay/upper/usr/share/another-overlay-mount")
208 self.assertTrue(line and line.startswith("overlay"), msg=output)
209
210 @OETestTag("runqemu")
211 def test_correct_image_fstab(self):
212 """
213 Summary: Check that we can create an image when all parameters are
214 set correctly via fstab
215 Expected: Image is created successfully
216 Author: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>
217 """
218
219 base_files_append = """
220do_install:append() {
221 cat <<EOT >> ${D}${sysconfdir}/fstab
222tmpfs /mnt/overlay tmpfs mode=1777,strictatime,nosuid,nodev 0 0
223EOT
224}
225"""
226
227 self._test_correct_image('base-files', base_files_append)
228
229 @OETestTag("runqemu")
230 def test_correct_image_unit(self):
231 """
232 Summary: Check that we can create an image when all parameters are
233 set correctly via mount unit
234 Expected: Image is created successfully
235 Author: Vyacheslav Yurkov <uvv.mail@gmail.com>
236 """
237
238 systemd_machine_unit_append = """
239SYSTEMD_SERVICE:${PN} += " \
240 mnt-overlay.mount \
241"
242
243do_install:append() {
244 install -d ${D}${systemd_system_unitdir}
245 cat <<EOT > ${D}${systemd_system_unitdir}/mnt-overlay.mount
246[Unit]
247Description=Tmpfs directory
248DefaultDependencies=no
249
250[Mount]
251What=tmpfs
252Where=/mnt/overlay
253Type=tmpfs
254Options=mode=1777,strictatime,nosuid,nodev
255
256[Install]
257WantedBy=multi-user.target
258EOT
259}
260
261"""
262
263 self._test_correct_image('systemd-machine-units', systemd_machine_unit_append)
264
265@OETestTag("runqemu")
266class OverlayFSEtcRunTimeTests(OESelftestTestCase):
267 """overlayfs-etc class tests"""
268
269 def test_all_required_variables_set(self):
270 """
271 Summary: Check that required variables are set
272 Expected: Fail when any of required variables is missing
273 Author: Vyacheslav Yurkov <uvv.mail@gmail.com>
274 """
275
276 configBase = """
277# Use systemd as init manager
278INIT_MANAGER = "systemd"
279
280# enable overlayfs in the kernel
281KERNEL_EXTRA_FEATURES:append = " features/overlayfs/overlayfs.scc"
282
283# Image configuration for overlayfs-etc
284EXTRA_IMAGE_FEATURES += "overlayfs-etc"
285IMAGE_FEATURES:remove = "package-management"
286"""
287 configMountPoint = """
288OVERLAYFS_ETC_MOUNT_POINT = "/data"
289"""
290 configDevice = """
291OVERLAYFS_ETC_DEVICE = "/dev/mmcblk0p1"
292"""
293
294 self.write_config(configBase)
295 res = bitbake('core-image-minimal', ignore_status=True)
296 line = getline(res, "OVERLAYFS_ETC_MOUNT_POINT must be set in your MACHINE configuration")
297 self.assertTrue(line, msg=res.output)
298
299 self.append_config(configMountPoint)
300 res = bitbake('core-image-minimal', ignore_status=True)
301 line = getline(res, "OVERLAYFS_ETC_DEVICE must be set in your MACHINE configuration")
302 self.assertTrue(line, msg=res.output)
303
304 self.append_config(configDevice)
305 res = bitbake('core-image-minimal', ignore_status=True)
306 line = getline(res, "OVERLAYFS_ETC_FSTYPE should contain a valid file system type on /dev/mmcblk0p1")
307 self.assertTrue(line, msg=res.output)
308
309 def test_image_feature_conflict(self):
310 """
311 Summary: Overlayfs-etc is not allowed to be used with package-management
312 Expected: Feature conflict
313 Author: Vyacheslav Yurkov <uvv.mail@gmail.com>
314 """
315
316 config = """
317# Use systemd as init manager
318INIT_MANAGER = "systemd"
319
320# enable overlayfs in the kernel
321KERNEL_EXTRA_FEATURES:append = " features/overlayfs/overlayfs.scc"
322EXTRA_IMAGE_FEATURES += "overlayfs-etc"
323EXTRA_IMAGE_FEATURES += "package-management"
324"""
325
326 self.write_config(config)
327
328 res = bitbake('core-image-minimal', ignore_status=True)
329 line = getline(res, "contains conflicting IMAGE_FEATURES")
330 self.assertTrue("overlayfs-etc" in res.output, msg=res.output)
331 self.assertTrue("package-management" in res.output, msg=res.output)
332
333 # https://bugzilla.yoctoproject.org/show_bug.cgi?id=14963
334 @skipIfNotMachine("qemux86-64", "tests are qemux86-64 specific currently")
335 def test_image_feature_is_missing(self):
336 """
337 Summary: Overlayfs-etc class is not applied when image feature is not set
338 Expected: Image is created successfully but /etc is not an overlay
339 Author: Vyacheslav Yurkov <uvv.mail@gmail.com>
340 """
341
342 config = """
343# Use systemd as init manager
344INIT_MANAGER = "systemd"
345
346# enable overlayfs in the kernel
347KERNEL_EXTRA_FEATURES:append = " features/overlayfs/overlayfs.scc"
348
349IMAGE_FSTYPES += "wic"
350WKS_FILE = "overlayfs_etc.wks.in"
351
352EXTRA_IMAGE_FEATURES += "read-only-rootfs"
353# Image configuration for overlayfs-etc
354OVERLAYFS_ETC_MOUNT_POINT = "/data"
355OVERLAYFS_ETC_DEVICE = "/dev/sda3"
356OVERLAYFS_ROOTFS_TYPE = "ext4"
357"""
358
359 self.write_config(config)
360
361 bitbake('core-image-minimal')
362
363 with runqemu('core-image-minimal', image_fstype='wic') as qemu:
364 status, output = qemu.run_serial("/bin/mount")
365
366 line = getline_qemu(output, "upperdir=/data/overlay-etc/upper")
367 self.assertFalse(line, msg=output)
368
369 @skipIfNotMachine("qemux86-64", "tests are qemux86-64 specific currently")
370 def test_sbin_init_preinit(self):
371 self.run_sbin_init(False, "ext4")
372
373 @skipIfNotMachine("qemux86-64", "tests are qemux86-64 specific currently")
374 def test_sbin_init_original(self):
375 self.run_sbin_init(True, "ext4")
376
377 @skipIfNotMachine("qemux86-64", "tests are qemux86-64 specific currently")
378 def test_sbin_init_read_only(self):
379 self.run_sbin_init(True, "squashfs")
380
381 def run_sbin_init(self, origInit, rootfsType):
382 """
383 Summary: Confirm we can replace original init and mount overlay on top of /etc
384 Expected: Image is created successfully and /etc is mounted as an overlay
385 Author: Vyacheslav Yurkov <uvv.mail@gmail.com>
386 """
387
388 config = self.get_working_config()
389
390 args = {
391 'OVERLAYFS_INIT_OPTION': "" if origInit else "init=/sbin/preinit",
392 'OVERLAYFS_ETC_USE_ORIG_INIT_NAME': int(origInit == True),
393 'OVERLAYFS_ROOTFS_TYPE': rootfsType,
394 'OVERLAYFS_ETC_CREATE_MOUNT_DIRS': int(rootfsType == "ext4")
395 }
396
397 self.write_config(config.format(**args))
398
399 bitbake('core-image-minimal')
400 testFile = "/etc/my-test-data"
401
402 with runqemu('core-image-minimal', image_fstype='wic', discard_writes=False) as qemu:
403 status, output = qemu.run_serial("/bin/mount")
404
405 line = getline_qemu(output, "/dev/sda3")
406 self.assertTrue("/data" in output, msg=output)
407
408 line = getline_qemu(output, "upperdir=/data/overlay-etc/upper")
409 self.assertTrue(line and line.startswith("/data/overlay-etc/upper on /etc type overlay"), msg=output)
410
411 # check that lower layer is not available
412 status, output = qemu.run_serial("ls -1 /data/overlay-etc/lower")
413 line = getline_qemu(output, "No such file or directory")
414 self.assertTrue(line, msg=output)
415
416 status, output = qemu.run_serial("touch " + testFile)
417 status, output = qemu.run_serial("sync")
418 status, output = qemu.run_serial("ls -1 " + testFile)
419 line = getline_qemu(output, testFile)
420 self.assertTrue(line and line.startswith(testFile), msg=output)
421
422 # Check that file exists in /etc after reboot
423 with runqemu('core-image-minimal', image_fstype='wic') as qemu:
424 status, output = qemu.run_serial("ls -1 " + testFile)
425 line = getline_qemu(output, testFile)
426 self.assertTrue(line and line.startswith(testFile), msg=output)
427
428 @skipIfNotMachine("qemux86-64", "tests are qemux86-64 specific currently")
429 def test_lower_layer_access(self):
430 """
431 Summary: Test that lower layer of /etc is available read-only when configured
432 Expected: Can't write to lower layer. The files on lower and upper different after
433 modification
434 Author: Vyacheslav Yurkov <uvv.mail@gmail.com>
435 """
436
437 config = self.get_working_config()
438
439 configLower = """
440OVERLAYFS_ETC_EXPOSE_LOWER = "1"
441IMAGE_INSTALL:append = " overlayfs-user"
442"""
443 testFile = "lower-layer-test.txt"
444
445 args = {
446 'OVERLAYFS_INIT_OPTION': "",
447 'OVERLAYFS_ETC_USE_ORIG_INIT_NAME': 1,
448 'OVERLAYFS_ROOTFS_TYPE': "ext4",
449 'OVERLAYFS_ETC_CREATE_MOUNT_DIRS': 1
450 }
451
452 self.write_config(config.format(**args))
453
454 self.append_config(configLower)
455 bitbake('core-image-minimal')
456
457 with runqemu('core-image-minimal', image_fstype='wic') as qemu:
458 status, output = qemu.run_serial("echo \"Modified in upper\" > /etc/" + testFile)
459 status, output = qemu.run_serial("diff /etc/" + testFile + " /data/overlay-etc/lower/" + testFile)
460 line = getline_qemu(output, "Modified in upper")
461 self.assertTrue(line, msg=output)
462 line = getline_qemu(output, "Original file")
463 self.assertTrue(line, msg=output)
464
465 status, output = qemu.run_serial("touch /data/overlay-etc/lower/ro-test.txt")
466 line = getline_qemu(output, "Read-only file system")
467 self.assertTrue(line, msg=output)
468
469 def get_working_config(self):
470 return """
471# Use systemd as init manager
472INIT_MANAGER = "systemd"
473
474# enable overlayfs in the kernel
475KERNEL_EXTRA_FEATURES:append = " \
476 features/overlayfs/overlayfs.scc \
477 cfg/fs/squashfs.scc"
478
479IMAGE_FSTYPES += "wic"
480OVERLAYFS_INIT_OPTION = "{OVERLAYFS_INIT_OPTION}"
481OVERLAYFS_ROOTFS_TYPE = "{OVERLAYFS_ROOTFS_TYPE}"
482OVERLAYFS_ETC_CREATE_MOUNT_DIRS = "{OVERLAYFS_ETC_CREATE_MOUNT_DIRS}"
483WKS_FILE = "overlayfs_etc.wks.in"
484
485EXTRA_IMAGE_FEATURES += "read-only-rootfs"
486# Image configuration for overlayfs-etc
487EXTRA_IMAGE_FEATURES += "overlayfs-etc"
488IMAGE_FEATURES:remove = "package-management"
489OVERLAYFS_ETC_MOUNT_POINT = "/data"
490OVERLAYFS_ETC_FSTYPE = "ext4"
491OVERLAYFS_ETC_DEVICE = "/dev/sda3"
492OVERLAYFS_ETC_USE_ORIG_INIT_NAME = "{OVERLAYFS_ETC_USE_ORIG_INIT_NAME}"
493
494ROOTFS_POSTPROCESS_COMMAND += "{OVERLAYFS_ROOTFS_TYPE}_rootfs"
495
496ext4_rootfs() {{
497}}
498
499squashfs_rootfs() {{
500 mkdir -p ${{IMAGE_ROOTFS}}/data
501}}
502"""