ext4: actually request zeroing of inode table after grow

BugLink: https://bugs.launchpad.net/bugs/1836614
commit 310a997fd74de778b9a4848a64be9cda9f18764a upstream.

It is never possible, that number of block groups decreases,
since only online grow is supported.

But after a growing occured, we have to zero inode tables
for just created new block groups.

Fixes: 19c5246d2516 ("ext4: add new online resize interface")
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 941ba9d166d75bd484880a7ec5f274022d5176b8..e7788b4ec9afa5a9d4253ed5bcfa1d9d812b0972 100644 (file)
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -979,7 +979,7 @@ mext_out:
                if (err == 0)
                        err = err2;
                mnt_drop_write_file(filp);
-               if (!err && (o_group > EXT4_SB(sb)->s_groups_count) &&
+               if (!err && (o_group < EXT4_SB(sb)->s_groups_count) &&
                    ext4_has_group_desc_csum(sb) &&
                    test_opt(sb, INIT_INODE_TABLE))
                        err = ext4_register_li_request(sb, o_group);