[PATCH 24/29] block: add a sb_bdev_nr_blocks helper
From: Christoph Hellwig <hch@lst.de>
Date: 2021-10-13 05:44:06
Also in:
dm-devel, linux-bcache, linux-block, linux-btrfs, linux-fsdevel, linux-nfs, linux-nvme, linux-raid, linux-scsi, ntfs3, target-devel
Subsystem:
the rest · Maintainer:
Linus Torvalds
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 <hch@lst.de> --- 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