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      1 # Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
      2 # Use of this source code is governed by a BSD-style license that can be
      3 # found in the LICENSE file.
      4 
      5 import logging
      6 import os
      7 
      8 from autotest_lib.client.bin import site_utils, test, utils
      9 from autotest_lib.client.common_lib import error
     10 
     11 ROOTFS_SIZE = 2 * 1024 * 1024 * 1024
     12 
     13 class platform_PartitionCheck(test.test):
     14     """
     15     Verify partition size is correct.
     16     """
     17     version = 1
     18 
     19     def get_block_size(self, device):
     20         """
     21         Check the block size of a block device.
     22 
     23         Args:
     24             @param device: string, name of the block device.
     25 
     26         Returns:
     27             int, size of block in bytes.
     28         """
     29 
     30         # Construct a pathname to find the logic block size for this device
     31         sysfs_path = os.path.join('/sys', 'block', device,
     32                                   'queue', 'logical_block_size')
     33 
     34         return int(utils.read_one_line(sysfs_path))
     35 
     36     def get_partition_size(self, device, partition):
     37         """
     38         Get the number of blocks in the partition.
     39 
     40         Args:
     41             @param device: string, name of the block device.
     42             @param partition: string, partition name
     43 
     44         Returns:
     45             int, number of blocks
     46         """
     47 
     48         part_file = os.path.join('/sys', 'block', device, partition, 'size')
     49         part_blocks = int(utils.read_one_line(part_file))
     50         return part_blocks
     51 
     52     def run_once(self):
     53         errors = []
     54         device = os.path.basename(site_utils.get_fixed_dst_drive())
     55         mmcpath = os.path.join('/sys', 'block', device)
     56 
     57         if os.path.exists(mmcpath) and device.startswith('mmc'):
     58             partitions = [device + 'p3', device + 'p5']
     59         else:
     60             partitions = [device + '3', device + '5']
     61 
     62         block_size = self.get_block_size(device)
     63 
     64         for p in partitions:
     65             pblocks = self.get_partition_size(device, p)
     66             psize = pblocks * block_size
     67             if psize != ROOTFS_SIZE:
     68                 errmsg = ('%s is %d bytes, expected %d' %
     69                           (p, psize, ROOTFS_SIZE))
     70                 logging.warning(errmsg)
     71                 errors.append(errmsg)
     72 
     73         # If self.error is not zero, there were errors.
     74         if errors:
     75             raise error.TestFail('There were %d partition errors: %s' %
     76                                  (len(errors), ': '.join(errors)))
     77