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Date:	Mon, 04 Jun 2007 16:01:45 -0700
From:	Mingming Cao <cmm@...ibm.com>
To:	Andreas Dilger <adilger@...sterfs.com>
Cc:	"Jose R. Santos" <jrs@...ibm.com>,
	linux-ext4 <linux-ext4@...r.kernel.org>
Subject: Re: [RFC][PATCH] Set JBD2_FEATURE_INCOMPAT_64BIT on filesystems
	larger than 32-bit blocks (take 2).

On Mon, 2007-06-04 at 11:57 -0600, Andreas Dilger wrote:
> On Jun 04, 2007  11:32 -0500, Jose R. Santos wrote:
> > Set the journals JBD2_FEATURE_INCOMPAT_64BIT on devices with more
> > than 32bit block sizes during mount time.  This ensure proper record
> > lenth when writing to the journal.
> > 
> > Signed-off-by: Jose R. Santos <jrs@...ibm.com>
> > ---
> >  fs/ext4/super.c |   11 +++++++++++
> >  1 file changed, 11 insertions(+)
> > 
> > Index: linux-2.6.22-rc3/fs/ext4/super.c
> > ===================================================================
> > --- linux-2.6.22-rc3.orig/fs/ext4/super.c	2007-06-04 11:01:20.028360650 -0500
> > +++ linux-2.6.22-rc3/fs/ext4/super.c	2007-06-04 11:05:11.389126418 -0500
> > @@ -1824,6 +1824,17 @@ static int ext4_fill_super (struct super
> >  		goto failed_mount3;
> >  	}
> >  
> > +        /*
> > +	 * Make sure to set JBD2_FEATURE_INCOMPAT_64BIT on filesystems
> > +	 * with more that 32-bit block counts
> > +	 */
> > +	if(es->s_blocks_count_hi &&

This need to be le32_to_cpu(es->s_blocks_count_hi)

> > +	   !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0,
> > +				      JBD2_FEATURE_INCOMPAT_64BIT)){
> > +		printk(KERN_ERR "ext4: Failed to set 64-bit journal feature\n");
> > +		goto failed_mount4;
> > +	}
> > +
> >  	/* We have now updated the journal if required, so we can
> >  	 * validate the data journaling mode. */
> >  	switch (test_opt(sb, DATA_FLAGS)) {
> 
> This is fine, but Linux CodingStyle would have "if (" and have ")) {".
> Don't bother reposting, but whoever adds this to the ext4 git tree and/or
> sending it to Andrew should make the fix.
> 
Okay, I can added the le32_to_cpu() and fix the style, and add the
following patch to ext4 patch queue.


Set the journals JBD2_FEATURE_INCOMPAT_64BIT on devices with more
than 32bit block sizes during mount time.  This ensure proper record
lenth when writing to the journal.

Signed-off-by: Mingming Cao <cmm@...ibm.com>
Signed-off-by: Jose R. Santos <jrs@...ibm.com>
---
 fs/ext4/super.c |   11 +++++++++++
 1 file changed, 11 insertions(+)

Index: linux-2.6.22-rc3/fs/ext4/super.c
===================================================================
--- linux-2.6.22-rc3.orig/fs/ext4/super.c	2007-06-04 11:01:20.028360650 -0500
+++ linux-2.6.22-rc3/fs/ext4/super.c	2007-06-04 11:05:11.389126418 -0500
@@ -1824,6 +1824,17 @@ static int ext4_fill_super (struct super
 		goto failed_mount3;
 	}

+        /*
+	 * Make sure to set JBD2_FEATURE_INCOMPAT_64BIT on filesystems
+	 * with more that 32-bit block counts
+	 */
+	if (le32_to_cpu(es->s_blocks_count_hi) &&
+	   !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0,
+				      JBD2_FEATURE_INCOMPAT_64BIT)){
+		printk(KERN_ERR "ext4: Failed to set 64-bit journal feature\n");
+		goto failed_mount4;
+	}
+
 	/* We have now updated the journal if required, so we can
 	 * validate the data journaling mode. */
 	switch (test_opt(sb, DATA_FLAGS)) {


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