linux-kernel - [PATCH] ext4: Update s_free_{inodes,blocks}

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Message-ID: <20120306194020.GI15164@tux1.beaverton.ibm.com>
Date:	Tue, 6 Mar 2012 11:40:20 -0800
From:	"Darrick J. Wong" <djwong@...ibm.com>
To:	"Theodore Ts'o" <tytso@....edu>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-ext4 <linux-ext4@...r.kernel.org>
Subject: [PATCH] ext4: Update s_free_{inodes,blocks}_count during online
	resize

When we're doing an online resize of an ext4 filesystem, we need to update the
free inode and block counts in the superblock so that fsck doesn't complain.

Signed-off-by: Darrick J. Wong <djwong@...ibm.com>
---

 fs/ext4/resize.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index f9d948f..a97ede4 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -1163,8 +1163,11 @@ static void ext4_update_super(struct super_block *sb,
 	do_div(reserved_blocks, 100);
 
 	ext4_blocks_count_set(es, ext4_blocks_count(es) + blocks_count);
+	ext4_free_blocks_count_set(es, ext4_free_blocks_count(es) + free_blocks);
 	le32_add_cpu(&es->s_inodes_count, EXT4_INODES_PER_GROUP(sb) *
 		     flex_gd->count);
+	le32_add_cpu(&es->s_free_inodes_count, EXT4_INODES_PER_GROUP(sb) *
+		     flex_gd->count);
 
 	/*
 	 * We need to protect s_groups_count against other CPUs seeing
@@ -1465,6 +1468,7 @@ static int ext4_group_extend_no_check(struct super_block *sb,
 	}
 
 	ext4_blocks_count_set(es, o_blocks_count + add);
+	ext4_free_blocks_count_set(es, ext4_free_blocks_count(es) + add);
 	ext4_debug("freeing blocks %llu through %llu\n", o_blocks_count,
 		   o_blocks_count + add);
 	/* We add the blocks to the bitmap and set the group need init bit */

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