From: Christoph Hellwig <hch@lst.de>
Date: Mon, 18 Oct 2021 12:11:25 +0200
Subject: [PATCH] block: add a sb_bdev_nr_blocks helper
Git-commit: bcc6e2cfaa48a4ad2e17719194f6d97a8e03f6c1
Patch-mainline: v5.16-rc1
References: jsc#PED-1183
Add a helper to return the size of sb->s_bdev in sb->s_blocksize_bits
based unites.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20211018101130.1838532-26-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
include/linux/genhd.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 01d27f3a970e..7b0326661a1e 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -251,6 +251,12 @@ 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 - SECTOR_SHIFT);
+}
+
int bdev_disk_changed(struct gendisk *disk, bool invalidate);
void blk_drop_partitions(struct gendisk *disk);
--
2.35.3