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# Copyright (C) 2021, Canonical ltd
# Ponnuvel Palaniyappan <[email protected]>
# This file is part of the sos project: https://github.com/sosreport/sos
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# version 2 of the GNU General Public License.
#
# See the LICENSE file in the source distribution for further information.
from sos.report.plugins import Plugin, IndependentPlugin, SoSPredicate
class Bcache(Plugin, IndependentPlugin):
short_desc = 'Bcache statistics'
plugin_name = 'bcache'
profiles = ('storage', 'hardware')
files = ('/sys/fs/bcache',)
def setup(self):
# Caution: reading /sys/fs/bcache/*/cache0/priority_stats is known
# to degrade performance on old kernels. Needs care if that's ever
# considered for inclusion here.
# see: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1840043
self.add_forbidden_path([
'/sys/fs/bcache/*/*/priority_stats',
])
self.add_copy_spec([
'/sys/block/bcache*/bcache/cache/internal/copy_gc_enabled',
'/sys/block/bcache*/bcache/cache_mode',
'/sys/block/bcache*/bcache/dirty_data',
'/sys/block/bcache*/bcache/io_errors',
'/sys/block/bcache*/bcache/sequential_cutoff',
'/sys/block/bcache*/bcache/stats_hour/bypassed',
'/sys/block/bcache*/bcache/stats_hour/cache_hit_ratio',
'/sys/block/bcache*/bcache/stats_hour/cache_hits',
'/sys/block/bcache*/bcache/stats_hour/cache_misses',
'/sys/block/bcache*/bcache/writeback_percent',
'/sys/fs/bcache/*/average_key_size',
'/sys/fs/bcache/*/bdev*/*',
'/sys/fs/bcache/*/bdev*/stat_*/*',
'/sys/fs/bcache/*/block_size',
'/sys/fs/bcache/*/bucket_size',
'/sys/fs/bcache/*/cache_available_percent',
'/sys/fs/bcache/*/congested_*_threshold_us',
'/sys/fs/bcache/*/internal/*',
'/sys/fs/bcache/*/stats_*/*',
'/sys/fs/bcache/*/tree_depth',
], pred=SoSPredicate(self, kmods=['bcache']))
# vim: set et ts=4 sw=4 :