From patchwork Wed Dec 10 08:05:23 2008
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Subject: [2/3,e2fsprogs] tune2fs: Don't allow tune2fs -I if flex_bg on
Date: Tue, 09 Dec 2008 22:05:23 -0000
From: Peng Tao <bergwolf@gmail.com>
X-Patchwork-Id: 13141
Message-Id: <493F7843.5030808@gmail.com>
To: ext4 development <linux-ext4@vger.kernel.org>

tune2fs: don't resize inode if flex_bg is on.

    Signed-off-by: Peng Tao <bergwolf@gmail.com>


diff --git a/misc/tune2fs.c b/misc/tune2fs.c
index 8bb6fd2..453a529 100644
--- a/misc/tune2fs.c
+++ b/misc/tune2fs.c
@@ -1604,6 +1604,13 @@ retry_open:
 				"unmounted.\n"), stderr);
 			exit(1);
 		}
+		if (fs->super->s_feature_incompat &
+		    EXT4_FEATURE_INCOMPAT_FLEX_BG) {
+			fputs(_("Filesystem has flex_bg feature. Resizing "
+				"inode will mess up inode table. Abort.\n"),
+				stderr);
+			exit(1);
+		}
 		/*
 		 * We want to update group descriptor also
 		 * with the new free inode count