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git://git.yoctoproject.org/poky.git
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63b3c44d27
Since Linux 5.4 a new read-only filesystem is available, erofs. Compared to squashfs it offers much better read performance with and without compression enabled. It suppports two optional compressors, lz4 and lz4hc. >From the mkfs.erofs man page: EROFS is a new enhanced lightweight linux read-only filesystem with modern designs (eg. no buffer head, reduced metadata, inline xattrs/data, etc.) for scenarios which need high-performance read-only requirements, e.g. Android OS for smartphones and LIVECDs. It also provides fixed-sized output compression support, which improves storage density, keeps relatively higher compression ratios, which is more useful to achieve high performance for embedded devices with limited memory since it has unnoticable memory overhead and page cache thrashing. This commit adds support for three new filesystem targets: erofs: erofs without compression erofs-lz4: erofs with lz4 compresssion enabled erofs-lz4hc: erofs with lz4hc compression enabled (From OE-Core rev: 41dead1ff8ccc49e6cd6e6f5d41a59d164693e0d) Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
82 lines
2.6 KiB
Python
82 lines
2.6 KiB
Python
#
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# SPDX-License-Identifier: GPL-2.0-only
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#
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import logging
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import os
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from wic import WicError
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from wic.pluginbase import SourcePlugin
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from wic.misc import exec_cmd, get_bitbake_var
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from wic.filemap import sparse_copy
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logger = logging.getLogger('wic')
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class RawCopyPlugin(SourcePlugin):
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"""
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Populate partition content from raw image file.
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"""
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name = 'rawcopy'
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@staticmethod
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def do_image_label(fstype, dst, label):
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if fstype.startswith('ext'):
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cmd = 'tune2fs -L %s %s' % (label, dst)
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elif fstype in ('msdos', 'vfat'):
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cmd = 'dosfslabel %s %s' % (dst, label)
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elif fstype == 'btrfs':
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cmd = 'btrfs filesystem label %s %s' % (dst, label)
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elif fstype == 'swap':
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cmd = 'mkswap -L %s %s' % (label, dst)
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elif fstype in ('squashfs', 'erofs'):
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raise WicError("It's not possible to update a %s "
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"filesystem label '%s'" % (fstype, label))
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else:
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raise WicError("Cannot update filesystem label: "
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"Unknown fstype: '%s'" % (fstype))
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exec_cmd(cmd)
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@classmethod
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def do_prepare_partition(cls, part, source_params, cr, cr_workdir,
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oe_builddir, bootimg_dir, kernel_dir,
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rootfs_dir, native_sysroot):
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"""
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Called to do the actual content population for a partition i.e. it
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'prepares' the partition to be incorporated into the image.
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"""
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if not kernel_dir:
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kernel_dir = get_bitbake_var("DEPLOY_DIR_IMAGE")
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if not kernel_dir:
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raise WicError("Couldn't find DEPLOY_DIR_IMAGE, exiting")
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logger.debug('Kernel dir: %s', kernel_dir)
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if 'file' not in source_params:
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raise WicError("No file specified")
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src = os.path.join(kernel_dir, source_params['file'])
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dst = os.path.join(cr_workdir, "%s.%s" % (os.path.basename(source_params['file']), part.lineno))
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if not os.path.exists(os.path.dirname(dst)):
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os.makedirs(os.path.dirname(dst))
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if 'skip' in source_params:
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sparse_copy(src, dst, skip=int(source_params['skip']))
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else:
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sparse_copy(src, dst)
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# get the size in the right units for kickstart (kB)
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du_cmd = "du -Lbks %s" % dst
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out = exec_cmd(du_cmd)
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filesize = int(out.split()[0])
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if filesize > part.size:
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part.size = filesize
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if part.label:
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RawCopyPlugin.do_image_label(part.fstype, dst, part.label)
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part.source_file = dst
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