ext4: Set the journal JBD2_FEATURE_INCOMPAT_64BIT on large devices

Jose R. Santos · tytso · commit eb40a09c679d · 2007-07-18T08:37:25.000-04:00
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 &lt;jrs@us.ibm.com&gt;
Signed-off-by: Andreas Dilger &lt;adilger@clusterfs.com&gt;
Signed-off-by: Mingming Cao &lt;cmm@us.ibm.com&gt;
Signed-off-by: Laurent Vivier &lt;Laurent.Vivier@bull.net&gt;
Signed-off-by: "Theodore Ts'o" &lt;tytso@mit.edu&gt;
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
@@ -1813,6 +1813,13 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
 		goto failed_mount3;
 	}
 
+	if (ext4_blocks_count(es) > 0xffffffffULL &&
+	    !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)) {
