patch ext3-don-t-try-to-resize-if-there-are-no-reserved-gdt-blocks-left.patch added to 2.6.27-stable tree

patch ext3-don-t-try-to-resize-if-there-are-no-reserved-gdt-blocks-left.patch added to 2.6.27-stable tree

[gregkh]

This is a note to let you know that we have just queued up the patch titled

    Subject: ext3: don't try to resize if there are no reserved gdt blocks left

to the 2.6.27-stable tree.  Its filename is

    ext3-don-t-try-to-resize-if-there-are-no-reserved-gdt-blocks-left.patch

A git repo of this tree can be found at 
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary


>From 972fbf779832e5ad15effa7712789aeff9224c37 Mon Sep 17 00:00:00 2001
From: Josef Bacik <jbacik@redhat.com>
Date: Sat, 18 Oct 2008 20:27:55 -0700
Subject: ext3: don't try to resize if there are no reserved gdt blocks left

From: Josef Bacik <jbacik@redhat.com>

commit 972fbf779832e5ad15effa7712789aeff9224c37 upstream.

When trying to resize a ext3 fs and you run out of reserved gdt blocks,
you get an error that doesn't actually tell you what went wrong, it just
says that the gdb it picked is not correct, which is the case since you
don't have any reserved gdt blocks left.  This patch adds a check to make
sure you have reserved gdt blocks to use, and if not prints out a more
relevant error.

Signed-off-by: Josef Bacik <jbacik@redhat.com>
Cc: <linux-ext4@vger.kernel.org>
Cc: Andreas Dilger <adilger@sun.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Willy Tarreau <w@1wt.eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 fs/ext3/resize.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/fs/ext3/resize.c
+++ b/fs/ext3/resize.c
@@ -790,7 +790,8 @@ int ext3_group_add(struct super_block *s
 
 	if (reserved_gdb || gdb_off == 0) {
 		if (!EXT3_HAS_COMPAT_FEATURE(sb,
-					     EXT3_FEATURE_COMPAT_RESIZE_INODE)){
+					     EXT3_FEATURE_COMPAT_RESIZE_INODE)
+		    || !le16_to_cpu(es->s_reserved_gdt_blocks)) {
 			ext3_warning(sb, __func__,
 				     "No reserved GDT blocks, can't resize");
 			return -EPERM;


Patches currently in stable-queue which might be from jbacik@redhat.com are

queue-2.6.27/ext3-don-t-try-to-resize-if-there-are-no-reserved-gdt-blocks-left.patch