From: Theodore Ts'o tytso@mit.edu
commit de394a86658ffe4e89e5328fd4993abfe41b7435 upstream.
When doing an online resize, the on-disk superblock on-disk wasn't updated. This means that when the file system is unmounted and remounted, and the on-disk overhead value is non-zero, this would result in the results of statfs(2) to be incorrect.
This was partially fixed by Commits 10b01ee92df5 ("ext4: fix overhead calculation to account for the reserved gdt blocks"), 85d825dbf489 ("ext4: force overhead calculation if the s_overhead_cluster makes no sense"), and eb7054212eac ("ext4: update the cached overhead value in the superblock").
However, since it was too expensive to forcibly recalculate the overhead for bigalloc file systems at every mount, this didn't fix the problem for bigalloc file systems. This commit should address the problem when resizing file systems with the bigalloc feature enabled.
Signed-off-by: Theodore Ts'o tytso@mit.edu Cc: stable@kernel.org Reviewed-by: Andreas Dilger adilger@dilger.ca Link: https://lore.kernel.org/r/20220629040026.112371-1-tytso@mit.edu Signed-off-by: Theodore Ts'o tytso@mit.edu Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/ext4/resize.c | 1 + 1 file changed, 1 insertion(+)
--- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -1446,6 +1446,7 @@ static void ext4_update_super(struct sup * Update the fs overhead information */ ext4_calculate_overhead(sb); + es->s_overhead_clusters = cpu_to_le32(sbi->s_overhead);
if (test_opt(sb, DEBUG)) printk(KERN_DEBUG "EXT4-fs: added group %u:"