diff options
Diffstat (limited to 'test/py/tests/test_ums.py')
| -rw-r--r-- | test/py/tests/test_ums.py | 236 |
1 files changed, 188 insertions, 48 deletions
diff --git a/test/py/tests/test_ums.py b/test/py/tests/test_ums.py index a137221c7a..f482cfeca1 100644 --- a/test/py/tests/test_ums.py +++ b/test/py/tests/test_ums.py @@ -2,13 +2,17 @@ # # SPDX-License-Identifier: GPL-2.0 -# Test U-Boot's "ums" command. At present, this test only ensures that a UMS -# device can be enumerated by the host/test machine. In the future, this test -# should be enhanced to validate disk IO. +# 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: @@ -17,13 +21,36 @@ 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'}, + { + "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 = ( - {'type': 'mmc', 'id': '0'}, # eMMC; always present - {'type': 'mmc', 'id': '1'}, # SD card; present since I plugged one in + # 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 @@ -34,47 +61,42 @@ ACTION=="add", SUBSYSTEM=="block", SUBSYSTEMS=="usb", KERNELS=="3-13", MODE:="66 (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.) -''' -def open_ums_device(host_ums_dev_node): - '''Attempt to open a device node, returning either the opened file handle, - or None on any error.''' +c) /etc/fstab entries to allow the block device to be mounted without requiring +root permissions. For example: - try: - return open(host_ums_dev_node, 'rb') - except: - return None - -def wait_for_ums_device(host_ums_dev_node): - '''Continually attempt to open the device node exported by the "ums" - command, and either return the opened file handle, or raise an exception - after a timeout.''' - - for i in xrange(100): - fh = open_ums_device(host_ums_dev_node) - if fh: - return fh - time.sleep(0.1) - raise Exception('UMS device did not appear') - -def wait_for_ums_device_gone(host_ums_dev_node): - '''Continually attempt to open the device node exported by the "ums" - command, and either return once the device has disappeared, or raise an - exception if it does not before a timeout occurs.''' - - for i in xrange(100): - fh = open_ums_device(host_ums_dev_node) - if not fh: - return - fh.close() - time.sleep(0.1) - raise Exception('UMS device did not disappear') +/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, and this device must disappear when "ums" is - aborted.''' + 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'] @@ -84,11 +106,129 @@ def test_ums(u_boot_console, env__usb_dev_port, env__block_devs): # 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) - cmd = 'ums %s %s %s' % (tgt_usb_ctlr, tgt_dev_type, tgt_dev_id) - u_boot_console.run_command('ums 0 mmc 0', wait_for_prompt=False) - fh = wait_for_ums_device(host_ums_dev_node) - fh.read(4096) - fh.close() - u_boot_console.ctrlc() - wait_for_ums_device_gone(host_ums_dev_node) + 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) |