From: Tang Junhui <[email protected]> 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 <[email protected]> Reviewed-by: Michael Lyle <[email protected]> --- drivers/md/bcache/sysfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) 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); -- 2.14.1
