1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
# Copyright (c) 2015-2016, NVIDIA CORPORATION. All rights reserved.
#
# SPDX-License-Identifier: GPL-2.0
# Test U-Boot's "ums" command. The test starts UMS in U-Boot, waits for USB
# device enumeration on the host, reads a small block of data from the UMS
# block device, optionally mounts a partition and performs filesystem-based
# read/write tests, and finally aborts the "ums" command in U-Boot.
import os
import os.path
import pytest
import re
import time
import u_boot_utils
'''
Note: This test relies on:
a) boardenv_* to contain configuration values to define which USB ports are
available for testing. Without this, this test will be automatically skipped.
For example:
# Leave this list empty if you have no block_devs below with writable
# partitions defined.
env__mount_points = (
"/mnt/ubtest-mnt-p2371-2180-na",
)
env__usb_dev_ports = (
{
"tgt_usb_ctlr": "0",
"host_ums_dev_node": "/dev/disk/by-path/pci-0000:00:14.0-usb-0:13:1.0-scsi-0:0:0:0",
},
)
env__block_devs = (
# eMMC; always present
{
"type": "mmc",
"id": "0",
# The following two properties are optional.
# If present, the partition will be mounted and a file written-to and
# read-from it. If missing, only a simple block read test will be
# performed.
"writable_fs_partition": 1,
"writable_fs_subdir": "tmp/",
},
# SD card; present since I plugged one in
{
"type": "mmc",
"id": "1"
},
)
b) udev rules to set permissions on devices nodes, so that sudo is not
required. For example:
ACTION=="add", SUBSYSTEM=="block", SUBSYSTEMS=="usb", KERNELS=="3-13", MODE:="666"
(You may wish to change the group ID instead of setting the permissions wide
open. All that matters is that the user ID running the test can access the
device.)
c) /etc/fstab entries to allow the block device to be mounted without requiring
root permissions. For example:
/dev/disk/by-path/pci-0000:00:14.0-usb-0:13:1.0-scsi-0:0:0:0-part1 /mnt/ubtest-mnt-p2371-2180-na ext4 noauto,user,nosuid,nodev
This entry is only needed if any block_devs above contain a
writable_fs_partition value.
'''
@pytest.mark.buildconfigspec('cmd_usb_mass_storage')
def test_ums(u_boot_console, env__usb_dev_port, env__block_devs):
'''Test the "ums" command; the host system must be able to enumerate a UMS
device when "ums" is running, block and optionally file I/O are tested,
and this device must disappear when "ums" is aborted.
Args:
u_boot_console: A U-Boot console connection.
env__usb_dev_port: The single USB device-mode port specification on
which to run the test. See the file-level comment above for
details of the format.
env__block_devs: The list of block devices that the target U-Boot
device has attached. See the file-level comment above for details
of the format.
Returns:
Nothing.
'''
have_writable_fs_partition = 'writable_fs_partition' in env__block_devs[0]
if not have_writable_fs_partition:
# If 'writable_fs_subdir' is missing, we'll skip all parts of the
# testing which mount filesystems.
u_boot_console.log.warning(
'boardenv missing "writable_fs_partition"; ' +
'UMS testing will be limited.')
tgt_usb_ctlr = env__usb_dev_port['tgt_usb_ctlr']
host_ums_dev_node = env__usb_dev_port['host_ums_dev_node']
# We're interested in testing USB device mode on each port, not the cross-
# product of that with each device. So, just pick the first entry in the
# device list here. We'll test each block device somewhere else.
tgt_dev_type = env__block_devs[0]['type']
tgt_dev_id = env__block_devs[0]['id']
if have_writable_fs_partition:
mount_point = u_boot_console.config.env['env__mount_points'][0]
mount_subdir = env__block_devs[0]['writable_fs_subdir']
part_num = env__block_devs[0]['writable_fs_partition']
host_ums_part_node = '%s-part%d' % (host_ums_dev_node, part_num)
else:
host_ums_part_node = host_ums_dev_node
test_f = u_boot_utils.PersistentRandomFile(u_boot_console, 'ums.bin',
1024 * 1024);
if have_writable_fs_partition:
mounted_test_fn = mount_point + '/' + mount_subdir + test_f.fn
def start_ums():
'''Start U-Boot's ums shell command.
This also waits for the host-side USB enumeration process to complete.
Args:
None.
Returns:
Nothing.
'''
u_boot_console.log.action(
'Starting long-running U-Boot ums shell command')
cmd = 'ums %s %s %s' % (tgt_usb_ctlr, tgt_dev_type, tgt_dev_id)
u_boot_console.run_command(cmd, wait_for_prompt=False)
u_boot_console.wait_for(re.compile('UMS: LUN.*[\r\n]'))
fh = u_boot_utils.wait_until_open_succeeds(host_ums_part_node)
u_boot_console.log.action('Reading raw data from UMS device')
fh.read(4096)
fh.close()
def mount():
'''Mount the block device that U-Boot exports.
Args:
None.
Returns:
Nothing.
'''
u_boot_console.log.action('Mounting exported UMS device')
cmd = ('/bin/mount', host_ums_part_node)
u_boot_utils.run_and_log(u_boot_console, cmd)
def umount(ignore_errors):
'''Unmount the block device that U-Boot exports.
Args:
ignore_errors: Ignore any errors. This is useful if an error has
already been detected, and the code is performing best-effort
cleanup. In this case, we do not want to mask the original
error by "honoring" any new errors.
Returns:
Nothing.
'''
u_boot_console.log.action('Unmounting UMS device')
cmd = ('/bin/umount', host_ums_part_node)
u_boot_utils.run_and_log(u_boot_console, cmd, ignore_errors)
def stop_ums(ignore_errors):
'''Stop U-Boot's ums shell command from executing.
This also waits for the host-side USB de-enumeration process to
complete.
Args:
ignore_errors: Ignore any errors. This is useful if an error has
already been detected, and the code is performing best-effort
cleanup. In this case, we do not want to mask the original
error by "honoring" any new errors.
Returns:
Nothing.
'''
u_boot_console.log.action(
'Stopping long-running U-Boot ums shell command')
u_boot_console.ctrlc()
u_boot_utils.wait_until_file_open_fails(host_ums_part_node,
ignore_errors)
ignore_cleanup_errors = True
try:
start_ums()
if not have_writable_fs_partition:
# Skip filesystem-based testing if not configured
return
try:
mount()
u_boot_console.log.action('Writing test file via UMS')
cmd = ('rm', '-f', mounted_test_fn)
u_boot_utils.run_and_log(u_boot_console, cmd)
if os.path.exists(mounted_test_fn):
raise Exception('Could not rm target UMS test file')
cmd = ('cp', test_f.abs_fn, mounted_test_fn)
u_boot_utils.run_and_log(u_boot_console, cmd)
ignore_cleanup_errors = False
finally:
umount(ignore_errors=ignore_cleanup_errors)
finally:
stop_ums(ignore_errors=ignore_cleanup_errors)
ignore_cleanup_errors = True
try:
start_ums()
try:
mount()
u_boot_console.log.action('Reading test file back via UMS')
read_back_hash = u_boot_utils.md5sum_file(mounted_test_fn)
cmd = ('rm', '-f', mounted_test_fn)
u_boot_utils.run_and_log(u_boot_console, cmd)
ignore_cleanup_errors = False
finally:
umount(ignore_errors=ignore_cleanup_errors)
finally:
stop_ums(ignore_errors=ignore_cleanup_errors)
written_hash = test_f.content_hash
assert(written_hash == read_back_hash)
|
