From 7f262f737502689ddc77117ffdefaea0a4a25b03 Mon Sep 17 00:00:00 2001
From: Luis Chamberlain <mcgrof@kernel.org>
Date: Wed, 27 Apr 2022 18:02:54 +0200
Subject: [PATCH] f2fs: ensure only power of 2 zone sizes are allowed
F2FS zoned support has power of 2 zone size assumption in many places
such as in __f2fs_issue_discard_zone, init_blkz_info. As the power of 2
requirement has been removed from the block layer, explicitly add a
condition in f2fs to allow only power of 2 zone size devices.
This condition will be relaxed once those calculation based on power of
2 is made generic.
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Pankaj Raghav <p.raghav@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
fs/f2fs/super.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index df232ec858714..d06a577a12087 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -3658,6 +3658,10 @@ static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
return 0;
zone_sectors = bdev_zone_sectors(bdev);
+ if (!is_power_of_2(zone_sectors)) {
+ f2fs_err(sbi, "F2FS does not support non power of 2 zone sizes\n");
+ return -EINVAL;
+ }
if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
SECTOR_TO_BLOCK(zone_sectors))
--
2.30.2