From 33c81a9cf0ddcc83cd173943d46290152d45416c Mon Sep 17 00:00:00 2001 From: Mike Williams Date: Thu, 28 May 2015 08:40:46 +0000 Subject: Adds jffs2 write extension This adds a write extension that allows for a jffs2 root filesystem image to be created. Change-Id: If888375a87ffad62c8e79aba20ab2f112ac4214b --- jffs2.write | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ jffs2.write.help | 28 +++++++++++++++++++++++++ 2 files changed, 92 insertions(+) create mode 100644 jffs2.write create mode 100644 jffs2.write.help diff --git a/jffs2.write b/jffs2.write new file mode 100644 index 00000000..46b69a53 --- /dev/null +++ b/jffs2.write @@ -0,0 +1,64 @@ +#!/usr/bin/python +#-*- coding: utf-8 -*- +# Copyright © 2015 Codethink Limited + +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; version 2 of the License. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with this program. If not, see . + + +'''A Morph deployment write extension for creating images with jffs2 + as the root filesystem.''' + + +import cliapp +import os + +import morphlib.writeexts + + +class Jffs2WriteExtension(morphlib.writeexts.WriteExtension): + + '''See jffs2.write.help for documentation.''' + + def process_args(self, args): + if len(args) != 2: + raise cliapp.AppException('Wrong number of command line args') + + temp_root, location = args + + try: + self.create_jffs2_system(temp_root, location) + self.status(msg='Disk image has been created at %(location)s', + location = location) + except Exception: + self.status(msg='Failure to deploy system to %(location)s', + location = location) + raise + + def create_jffs2_system(self, temp_root, location): + erase_block = self.get_erase_block_size() + cliapp.runcmd( + ['mkfs.jffs2', '--pad', '--no-cleanmarkers', + '--eraseblock='+erase_block, '-d', temp_root, '-o', location]) + + def get_erase_block_size(self): + erase_block = os.environ.get('ERASE_BLOCK', '') + + if erase_block == '': + raise cliapp.AppException('ERASE_BLOCK was not given') + + if not erase_block.isdigit(): + raise cliapp.AppException('ERASE_BLOCK must be a whole number') + + return erase_block + +Jffs2WriteExtension().run() diff --git a/jffs2.write.help b/jffs2.write.help new file mode 100644 index 00000000..059a354b --- /dev/null +++ b/jffs2.write.help @@ -0,0 +1,28 @@ +#-*- coding: utf-8 -*- +# Copyright © 2015 Codethink Limited +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; version 2 of the License. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with this program; if not, see . + +help: | + + Creates a system produced by Morph build with a jffs2 filesystem and then + writes to an image. To use this extension, the host system must have access + to mkfs.jffs2 which is provided in the mtd-utilities.morph stratum. + + Parameters: + + * location: the pathname of the disk image to be created/upgraded, or the + path to the physical device. + + * ERASE_BLOCK: the erase block size of the target system, which can be + found in '/sys/class/mtd/mtdx/erasesize' -- cgit v1.2.1