From: Josef Bacik <jbacik@redhat.com> Date: Mon, 20 Apr 2009 15:31:35 -0400 Subject: [fs] ext3: don't resize if no reserved gdt blocks left Message-id: 1240255895-26089-1-git-send-email-jbacik@redhat.com O-Subject: [PATCH] [RHEL5.4] ext3: don't try to resize if there are no reserved gdt blocks left Bugzilla: 443541 RH-Acked-by: Peter Staubach <staubach@redhat.com> RH-Acked-by: Eric Sandeen <sandeen@redhat.com> This is in reference to bz 443541, and is a backport of the commit commit 972fbf779832e5ad15effa7712789aeff9224c37 Author: Josef Bacik <jbacik@redhat.com> Date: Sat Oct 18 20:27:55 2008 -0700 ext3: don't try to resize if there are no reserved gdt blocks left 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> diff --git a/fs/ext3/resize.c b/fs/ext3/resize.c index c1fefb9..f2354d2 100644 --- a/fs/ext3/resize.c +++ b/fs/ext3/resize.c @@ -791,7 +791,8 @@ int ext3_group_add(struct super_block *sb, struct ext3_new_group_data *input) 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, __FUNCTION__, "No reserved GDT blocks, can't resize"); return -EPERM;