[PATCH v3 08/13] ext4: calculate free_clusters_count in cluster unit in verify_group_input

From: Kemeng Shi
Date: Sat Aug 26 2023 - 05:48:07 EST


The field free_cluster_count in struct ext4_new_group_data should be
in units of clusters. In verify_group_input() this field is being
filled in units of blocks. Fortunately, we don't support online
resizing of bigalloc file systems, and for non-bigalloc file systems,
the cluster size == block size. But fix this in case we do support
online resizing of bigalloc file systems in the future.

Signed-off-by: Kemeng Shi <shikemeng@xxxxxxxxxxxxxxx>
Reviewed-by: Theodore Ts'o <tytso@xxxxxxx>
---
fs/ext4/resize.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index a370ca1a2bd6..3ad2b1a900ad 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -154,8 +154,9 @@ static int verify_group_input(struct super_block *sb,

overhead = ext4_group_overhead_blocks(sb, group);
metaend = start + overhead;
- input->free_clusters_count = free_blocks_count =
- input->blocks_count - 2 - overhead - sbi->s_itb_per_group;
+ free_blocks_count = input->blocks_count - 2 - overhead -
+ sbi->s_itb_per_group;
+ input->free_clusters_count = EXT4_B2C(sbi, free_blocks_count);

if (test_opt(sb, DEBUG))
printk(KERN_DEBUG "EXT4-fs: adding %s group %u: %u blocks "
--
2.30.0