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ext2: fix missing percpu_counter_inc 

commit bc2fbaa4d3 upstream.

sbi->s_freeinodes_counter is only decreased by the ext2 code, it is never
increased. This patch fixes it.

Note that sbi->s_freeinodes_counter is only used in the algorithm that
tries to find the group for new allocations, so this bug is not easily
visible (the only visibility is that the group finding algorithm selects
inoptinal result).

Link: https://lore.kernel.org/r/alpine.LRH.2.02.2004201538300.19436@file01.intranet.prod.int.rdu2.redhat.com
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Mikulas Patocka 2020-04-20 16:02:21 -04:00 committed by Greg Kroah-Hartman
parent 6c7b42c8f0
commit 8cdf683553
1 changed files with 2 additions and 1 deletions
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3
fs/ext2/ialloc.c
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@ -80,6 +80,7 @@ static void ext2_release_inode(struct super_block *sb, int group, int dir)
if (dir)
le16_add_cpu(&desc->bg_used_dirs_count, -1);
spin_unlock(sb_bgl_lock(EXT2_SB(sb), group));
percpu_counter_inc(&EXT2_SB(sb)->s_freeinodes_counter);
if (dir)
percpu_counter_dec(&EXT2_SB(sb)->s_dirs_counter);
mark_buffer_dirty(bh);
@ -528,7 +529,7 @@ got:
goto fail;
}
percpu_counter_add(&sbi->s_freeinodes_counter, -1);
percpu_counter_dec(&sbi->s_freeinodes_counter);
if (S_ISDIR(mode))
percpu_counter_inc(&sbi->s_dirs_counter);