add ext2/3/4-specific _check_extN_filesystem function

The _check_generic_filesystem function doesn't force a full filesystem
check, so filesystem inconsistencies after a test wouldn't be noticed.
To fix this, I added an extN specific check filesystem function.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Christoph Hellwig <hch@lst.de>

common.rc

@@ -865,6 +865,52 @@ _check_generic_filesystem()
     return 0
 }
 
+# Check an ext2/3/4 filesystem
+#
+_check_extN_filesystem()
+{
+    device=$1
+
+    # If type is set, we're mounted
+    type=`_fs_type $device`
+    ok=1
+
+    if [ "$type" = "$FSTYP" ]
+    then
+        # mounted ...
+        mountpoint=`_umount_or_remount_ro $device`
+    fi
+
+    e2fsck -nf $device >$tmp.fsck 2>&1
+    if [ $? -ne 0 ]
+    then
+        echo "_check_extN_filesystem: filesystem on $device is inconsistent (see $seq.full)"
+
+        echo "_check_extN filesystem: filesystem on $device is inconsistent" >>$here/$seq.full
+        echo "*** e2fsck output ***"                          >>$here/$seq.full
+        cat $tmp.fsck                                         >>$here/$seq.full
+        echo "*** end e2fsck output"                          >>$here/$seq.full
+
+        ok=0
+    fi
+    rm -f $tmp.fsck
+
+    if [ $ok -eq 0 ]
+    then
+        echo "*** mount output ***"                           >>$here/$seq.full
+        _mount                                                >>$here/$seq.full
+        echo "*** end mount output"                           >>$here/$seq.full
+    elif [ "$type" = "$FSTYP" ]
+    then
+	# was mounted ...
+	_mount_or_remount_rw "$MOUNT_OPTIONS" $device $mountpoint
+	ok=$?
+    fi
+
+    [ $ok -eq 0 ] && exit 1
+    return 0
+}
+
 # run xfs_check and friends on a FS.
 
 _check_xfs_filesystem()
@@ -1033,6 +1079,9 @@ _check_test_fs()
     udf)
 	# do nothing for now
 	;;
+    ext2|ext3|ext4)
+	_check_extN_filesystem $TEST_DEV
+	;;
     *)
 	_check_generic_filesystem $TEST_DEV
 	;;
@@ -1059,6 +1108,9 @@ _check_scratch_fs()
     nfs*)
 	# Don't know how to check an NFS filesystem, yet.
 	;;
+    ext2|ext3|ext4)
+	_check_extN_filesystem $SCRATCH_DEV
+	;;
     *)
 	_check_generic_filesystem $SCRATCH_DEV
 	;;