# \[PATCH 24/29\] block: add a sb\_bdev\_nr\_blocks helper - From: Christoph Hellwig \ - Date: 2021-10-13 05:44:06 - List: linux-btrfs - Page: https://ratatoskr.run/linux-btrfs/2021/10/215845 - Thread: https://ratatoskr.run/linux-block/2021/10/215820/t.md ```text Add a helper to return the size of sb->s_bdev in sb->s_blocksize_bits based unites. Note that SECTOR_SHIFT has to be open coded due to include dependency issues for now, but I have a plan to sort that out eventually. Signed-off-by: Christoph Hellwig --- include/linux/genhd.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/linux/genhd.h b/include/linux/genhd.h index 082a3e5fd8fa1..6eaef8fa78bcd 100644 --- a/include/linux/genhd.h +++ b/include/linux/genhd.h @@ -245,6 +245,12 @@ static inline sector_t get_capacity(struct gendisk *disk) return bdev_nr_sectors(disk->part0); } +static inline u64 sb_bdev_nr_blocks(struct super_block *sb) +{ + return bdev_nr_sectors(sb->s_bdev) >> + (sb->s_blocksize_bits - 9 /* SECTOR_SHIFT */); +} + int bdev_disk_changed(struct gendisk *disk, bool invalidate); void blk_drop_partitions(struct gendisk *disk); -- 2.30.2 ```