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[v2,08/13] ext4: calculate free_clusters_count in cluster unit in verify_group_input

Message ID 20230826173735.4023594-9-shikemeng@huaweicloud.com
State Superseded
Headers show
Series fixes and cleanups to ext4 resize | expand

Commit Message

Kemeng Shi Aug. 26, 2023, 5:37 p.m. UTC 
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>
---
 fs/ext4/resize.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
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Patch

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 "