[Cluster-devel] [GFS2] Fix incorrect fs sync behaviour [2/5]

[Steven Whitehouse]

>From 4a221953ed121692aa25998451a57c7f4be8b4f6 Mon Sep 17 00:00:00 2001
From: Steven Whitehouse <swhiteho at redhat.com>
Date: Wed, 1 Nov 2006 09:57:57 -0500
Subject: [PATCH] [GFS2] Fix incorrect fs sync behaviour.

This adds a sync_fs superblock operation for GFS2 and removes
the journal flush from write_super in favour of sync_fs where it
ought to be. This is more or less identical to the way in which ext3
does this.

This bug was pointed out by Russell Cattelan <cattelan at redhat.com>

Cc: Russell Cattelan <cattelan at redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho at redhat.com>
---
 fs/gfs2/ops_super.c |   44 ++++++++++++++++++++++++++++----------------
 1 files changed, 28 insertions(+), 16 deletions(-)

diff --git a/fs/gfs2/ops_super.c b/fs/gfs2/ops_super.c
index 06f06f7..b47d959 100644
--- a/fs/gfs2/ops_super.c
+++ b/fs/gfs2/ops_super.c
@@ -138,16 +138,27 @@ static void gfs2_put_super(struct super_
 }
 
 /**
- * gfs2_write_super - disk commit all incore transactions
- * @sb: the filesystem
+ * gfs2_write_super
+ * @sb: the superblock
  *
- * This function is called every time sync(2) is called.
- * After this exits, all dirty buffers are synced.
  */
 
 static void gfs2_write_super(struct super_block *sb)
 {
+	sb->s_dirt = 0;
+}
+
+/**
+ * gfs2_sync_fs - sync the filesystem
+ * @sb: the superblock
+ *
+ * Flushes the log to disk.
+ */
+static int gfs2_sync_fs(struct super_block *sb, int wait)
+{
+	sb->s_dirt = 0;
 	gfs2_log_flush(sb->s_fs_info, NULL);
+	return 0;
 }
 
 /**
@@ -452,17 +463,18 @@ static void gfs2_destroy_inode(struct in
 }
 
 struct super_operations gfs2_super_ops = {
-	.alloc_inode = gfs2_alloc_inode,
-	.destroy_inode = gfs2_destroy_inode,
-	.write_inode = gfs2_write_inode,
-	.delete_inode = gfs2_delete_inode,
-	.put_super = gfs2_put_super,
-	.write_super = gfs2_write_super,
-	.write_super_lockfs = gfs2_write_super_lockfs,
-	.unlockfs = gfs2_unlockfs,
-	.statfs = gfs2_statfs,
-	.remount_fs = gfs2_remount_fs,
-	.clear_inode = gfs2_clear_inode,
-	.show_options = gfs2_show_options,
+	.alloc_inode		= gfs2_alloc_inode,
+	.destroy_inode		= gfs2_destroy_inode,
+	.write_inode		= gfs2_write_inode,
+	.delete_inode		= gfs2_delete_inode,
+	.put_super		= gfs2_put_super,
+	.write_super		= gfs2_write_super,
+	.sync_fs		= gfs2_sync_fs,
+	.write_super_lockfs 	= gfs2_write_super_lockfs,
+	.unlockfs		= gfs2_unlockfs,
+	.statfs			= gfs2_statfs,
+	.remount_fs		= gfs2_remount_fs,
+	.clear_inode		= gfs2_clear_inode,
+	.show_options		= gfs2_show_options,
 };
 
-- 
1.4.1