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ext4: calculate free_clusters_count in cluster unit in verify_group_input

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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@huaweicloud.com>
Reviewed-by: Theodore Ts'o <tytso@mit.edu>
Link: https://lore.kernel.org/r/20230826174712.4059355-9-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Kemeng Shi 2023-08-27 01:47:07 +08:00 committed by Theodore Ts'o
parent 3145807727
commit 1fc1bd2d18
1 changed files with 3 additions and 2 deletions
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5
fs/ext4/resize.c
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@ -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 "