[PATCH 22/29] squashfs: use bdev_nr_sectors instead of open coding it

Christoph Hellwig
2021-10-13T07:08:08Z

Use the proper helper to read the block device size.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
fs/squashfs/super.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
index 60d6951915f44..e83042ecf0d86 100644
--- a/fs/squashfs/super.c
+++ b/fs/squashfs/super.c
@@ -16,6 +16,7 @@

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

+#include <linux/blkdev.h>
#include <linux/fs.h>
#include <linux/fs_context.h>
#include <linux/fs_parser.h>
@@ -179,8 +180,8 @@ static int squashfs_fill_super(struct super_block *sb, struct fs_context *fc)
/* Check the filesystem does not extend beyond the end of the
block device */
msblk->bytes_used = le64_to_cpu(sblk->bytes_used);
- if (msblk->bytes_used < 0 || msblk->bytes_used >
- i_size_read(sb->s_bdev->bd_inode))
+ if (msblk->bytes_used < 0 ||
+ msblk->bytes_used > (bdev_nr_sectors(sb->s_bdev) << SECTOR_SHIFT))
goto failed_mount;

/* Check block size for sanity */
--
2.30.2