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| author |   Tang Junhui <tang.junhui@zte.com.cn> | 2018-03-18 17:36:20 -0700 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2018-03-18 20:15:20 -0600 |
| commit | 688892b3bc05e25da94866e32210e5f503f16f69 (patch) | |
| tree | ffdcf7b5853802c547860a4ca76da2ccff2f85c8 /drivers/md | |
| parent | bcache: fix inaccurate io state for detached bcache devices (diff) | |
| download | linux-dev-688892b3bc05e25da94866e32210e5f503f16f69.tar.xz linux-dev-688892b3bc05e25da94866e32210e5f503f16f69.zip | |
bcache: fix incorrect sysfs output value of strip size
Stripe size is shown as zero when no strip in back end device:
[root@ceph132 ~]# cat /sys/block/sdd/bcache/stripe_size
0.0k
Actually it should be 1T Bytes (1 << 31 sectors), but in sysfs
interface, stripe_size was changed from sectors to bytes, and move
9 bits left, so the 32 bits variable overflows.
This patch change the variable to a 64 bits type before moving bits.
Signed-off-by: Tang Junhui <tang.junhui@zte.com.cn>
Reviewed-by: Michael Lyle <mlyle@lyle.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/bcache/sysfs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c index 414129f7c49f..8c3fd05db87a 100644 --- a/drivers/md/bcache/sysfs.c +++ b/drivers/md/bcache/sysfs.c @@ -181,7 +181,7 @@ SHOW(__bch_cached_dev) sysfs_hprint(dirty_data, bcache_dev_sectors_dirty(&dc->disk) << 9); - sysfs_hprint(stripe_size, dc->disk.stripe_size << 9); + sysfs_hprint(stripe_size, ((uint64_t)dc->disk.stripe_size) << 9); var_printf(partial_stripes_expensive, "%u"); var_hprint(sequential_cutoff); |