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dac0e809b7
All classes in Python3 are new style classes and don't need to be inherited from object. Wic code works fine without this inheritance even with Python2, so it's harmless to remove it. [YOCTO #9412] (From OE-Core rev: a146b03ee7d0aa5bc1722da5977a5952782b69bf) Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
406 lines
15 KiB
Python
406 lines
15 KiB
Python
# ex:ts=4:sw=4:sts=4:et
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# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
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#
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# Copyright (c) 2013-2016 Intel Corporation.
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# All rights reserved.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 2 as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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# DESCRIPTION
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# This module provides the OpenEmbedded partition object definitions.
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#
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# AUTHORS
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# Tom Zanussi <tom.zanussi (at] linux.intel.com>
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# Ed Bartosh <ed.bartosh> (at] linux.intel.com>
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import os
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import tempfile
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import uuid
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from wic.utils.oe.misc import msger, parse_sourceparams
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from wic.utils.oe.misc import exec_cmd, exec_native_cmd
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from wic.plugin import pluginmgr
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partition_methods = {
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"do_stage_partition":None,
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"do_prepare_partition":None,
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"do_configure_partition":None,
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}
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class Partition():
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def __init__(self, args, lineno):
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self.args = args
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self.active = args.active
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self.align = args.align
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self.disk = args.disk
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self.extra_space = args.extra_space
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self.fsopts = args.fsopts
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self.fstype = args.fstype
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self.label = args.label
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self.mountpoint = args.mountpoint
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self.no_table = args.no_table
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self.overhead_factor = args.overhead_factor
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self.part_type = args.part_type
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self.rootfs_dir = args.rootfs_dir
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self.size = args.size
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self.source = args.source
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self.sourceparams = args.sourceparams
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self.system_id = args.system_id
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self.use_uuid = args.use_uuid
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self.uuid = args.uuid
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if args.use_uuid and not self.uuid:
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self.uuid = str(uuid.uuid4())
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self.lineno = lineno
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self.source_file = ""
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self.sourceparams_dict = {}
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def get_extra_block_count(self, current_blocks):
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"""
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The --size param is reflected in self.size (in kB), and we already
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have current_blocks (1k) blocks, calculate and return the
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number of (1k) blocks we need to add to get to --size, 0 if
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we're already there or beyond.
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"""
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msger.debug("Requested partition size for %s: %d" % \
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(self.mountpoint, self.size))
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if not self.size:
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return 0
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requested_blocks = self.size
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msger.debug("Requested blocks %d, current_blocks %d" % \
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(requested_blocks, current_blocks))
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if requested_blocks > current_blocks:
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return requested_blocks - current_blocks
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else:
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return 0
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def prepare(self, creator, cr_workdir, oe_builddir, rootfs_dir,
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bootimg_dir, kernel_dir, native_sysroot):
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"""
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Prepare content for individual partitions, depending on
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partition command parameters.
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"""
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if self.sourceparams:
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self.sourceparams_dict = parse_sourceparams(self.sourceparams)
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if not self.source:
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if not self.size:
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msger.error("The %s partition has a size of zero. Please "
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"specify a non-zero --size for that partition." % \
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self.mountpoint)
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if self.fstype and self.fstype == "swap":
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self.prepare_swap_partition(cr_workdir, oe_builddir,
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native_sysroot)
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self.source_file = "%s/fs.%s" % (cr_workdir, self.fstype)
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elif self.fstype:
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rootfs = "%s/fs_%s.%s.%s" % (cr_workdir, self.label,
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self.lineno, self.fstype)
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if os.path.isfile(rootfs):
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os.remove(rootfs)
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for prefix in ("ext", "btrfs", "vfat", "squashfs"):
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if self.fstype.startswith(prefix):
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method = getattr(self,
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"prepare_empty_partition_" + prefix)
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method(rootfs, oe_builddir, native_sysroot)
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self.source_file = rootfs
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break
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return
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plugins = pluginmgr.get_source_plugins()
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if self.source not in plugins:
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msger.error("The '%s' --source specified for %s doesn't exist.\n\t"
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"See 'wic list source-plugins' for a list of available"
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" --sources.\n\tSee 'wic help source-plugins' for "
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"details on adding a new source plugin." % \
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(self.source, self.mountpoint))
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self._source_methods = pluginmgr.get_source_plugin_methods(\
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self.source, partition_methods)
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self._source_methods["do_configure_partition"](self, self.sourceparams_dict,
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creator, cr_workdir,
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oe_builddir,
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bootimg_dir,
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kernel_dir,
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native_sysroot)
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self._source_methods["do_stage_partition"](self, self.sourceparams_dict,
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creator, cr_workdir,
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oe_builddir,
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bootimg_dir, kernel_dir,
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native_sysroot)
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self._source_methods["do_prepare_partition"](self, self.sourceparams_dict,
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creator, cr_workdir,
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oe_builddir,
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bootimg_dir, kernel_dir, rootfs_dir,
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native_sysroot)
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def prepare_rootfs_from_fs_image(self, cr_workdir, oe_builddir,
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rootfs_dir):
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"""
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Handle an already-created partition e.g. xxx.ext3
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"""
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rootfs = oe_builddir
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du_cmd = "du -Lbks %s" % rootfs
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out = exec_cmd(du_cmd)
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rootfs_size = out.split()[0]
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self.size = rootfs_size
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self.source_file = rootfs
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def prepare_rootfs(self, cr_workdir, oe_builddir, rootfs_dir,
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native_sysroot):
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"""
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Prepare content for a rootfs partition i.e. create a partition
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and fill it from a /rootfs dir.
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Currently handles ext2/3/4, btrfs and vfat.
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"""
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p_prefix = os.environ.get("PSEUDO_PREFIX", "%s/usr" % native_sysroot)
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p_localstatedir = os.environ.get("PSEUDO_LOCALSTATEDIR",
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"%s/../pseudo" % rootfs_dir)
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p_passwd = os.environ.get("PSEUDO_PASSWD", rootfs_dir)
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p_nosymlinkexp = os.environ.get("PSEUDO_NOSYMLINKEXP", "1")
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pseudo = "export PSEUDO_PREFIX=%s;" % p_prefix
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pseudo += "export PSEUDO_LOCALSTATEDIR=%s;" % p_localstatedir
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pseudo += "export PSEUDO_PASSWD=%s;" % p_passwd
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pseudo += "export PSEUDO_NOSYMLINKEXP=%s;" % p_nosymlinkexp
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pseudo += "%s/usr/bin/pseudo " % native_sysroot
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rootfs = "%s/rootfs_%s.%s.%s" % (cr_workdir, self.label,
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self.lineno, self.fstype)
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if os.path.isfile(rootfs):
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os.remove(rootfs)
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for prefix in ("ext", "btrfs", "vfat", "squashfs"):
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if self.fstype.startswith(prefix):
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method = getattr(self, "prepare_rootfs_" + prefix)
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method(rootfs, oe_builddir, rootfs_dir, native_sysroot, pseudo)
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self.source_file = rootfs
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# get the rootfs size in the right units for kickstart (kB)
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du_cmd = "du -Lbks %s" % rootfs
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out = exec_cmd(du_cmd)
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self.size = out.split()[0]
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break
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def prepare_rootfs_ext(self, rootfs, oe_builddir, rootfs_dir,
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native_sysroot, pseudo):
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"""
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Prepare content for an ext2/3/4 rootfs partition.
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"""
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du_cmd = "du -ks %s" % rootfs_dir
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out = exec_cmd(du_cmd)
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actual_rootfs_size = int(out.split()[0])
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extra_blocks = self.get_extra_block_count(actual_rootfs_size)
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if extra_blocks < self.extra_space:
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extra_blocks = self.extra_space
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rootfs_size = actual_rootfs_size + extra_blocks
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rootfs_size *= self.overhead_factor
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msger.debug("Added %d extra blocks to %s to get to %d total blocks" % \
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(extra_blocks, self.mountpoint, rootfs_size))
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exec_cmd("truncate %s -s %d" % (rootfs, rootfs_size * 1024))
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extra_imagecmd = "-i 8192"
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label_str = ""
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if self.label:
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label_str = "-L %s" % self.label
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mkfs_cmd = "mkfs.%s -F %s %s %s -d %s" % \
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(self.fstype, extra_imagecmd, rootfs, label_str, rootfs_dir)
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exec_native_cmd(mkfs_cmd, native_sysroot, pseudo=pseudo)
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def prepare_rootfs_btrfs(self, rootfs, oe_builddir, rootfs_dir,
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native_sysroot, pseudo):
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"""
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Prepare content for a btrfs rootfs partition.
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Currently handles ext2/3/4 and btrfs.
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"""
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du_cmd = "du -ks %s" % rootfs_dir
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out = exec_cmd(du_cmd)
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actual_rootfs_size = int(out.split()[0])
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extra_blocks = self.get_extra_block_count(actual_rootfs_size)
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if extra_blocks < self.extra_space:
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extra_blocks = self.extra_space
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rootfs_size = actual_rootfs_size + extra_blocks
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rootfs_size *= self.overhead_factor
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msger.debug("Added %d extra blocks to %s to get to %d total blocks" % \
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(extra_blocks, self.mountpoint, rootfs_size))
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exec_cmd("truncate %s -s %d" % (rootfs, rootfs_size * 1024))
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label_str = ""
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if self.label:
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label_str = "-L %s" % self.label
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mkfs_cmd = "mkfs.%s -b %d -r %s %s %s" % \
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(self.fstype, rootfs_size * 1024, rootfs_dir, label_str, rootfs)
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exec_native_cmd(mkfs_cmd, native_sysroot, pseudo=pseudo)
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def prepare_rootfs_vfat(self, rootfs, oe_builddir, rootfs_dir,
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native_sysroot, pseudo):
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"""
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Prepare content for a vfat rootfs partition.
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"""
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du_cmd = "du -bks %s" % rootfs_dir
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out = exec_cmd(du_cmd)
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blocks = int(out.split()[0])
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extra_blocks = self.get_extra_block_count(blocks)
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if extra_blocks < self.extra_space:
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extra_blocks = self.extra_space
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blocks += extra_blocks
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msger.debug("Added %d extra blocks to %s to get to %d total blocks" % \
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(extra_blocks, self.mountpoint, blocks))
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# Ensure total sectors is an integral number of sectors per
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# track or mcopy will complain. Sectors are 512 bytes, and we
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# generate images with 32 sectors per track. This calculation
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# is done in blocks, thus the mod by 16 instead of 32. Apply
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# sector count fix only when needed.
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if blocks % 16 != 0:
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blocks += (16 - (blocks % 16))
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label_str = "-n boot"
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if self.label:
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label_str = "-n %s" % self.label
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dosfs_cmd = "mkdosfs %s -S 512 -C %s %d" % (label_str, rootfs, blocks)
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exec_native_cmd(dosfs_cmd, native_sysroot)
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mcopy_cmd = "mcopy -i %s -s %s/* ::/" % (rootfs, rootfs_dir)
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exec_native_cmd(mcopy_cmd, native_sysroot)
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chmod_cmd = "chmod 644 %s" % rootfs
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exec_cmd(chmod_cmd)
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def prepare_rootfs_squashfs(self, rootfs, oe_builddir, rootfs_dir,
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native_sysroot, pseudo):
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"""
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Prepare content for a squashfs rootfs partition.
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"""
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squashfs_cmd = "mksquashfs %s %s -noappend" % \
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(rootfs_dir, rootfs)
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exec_native_cmd(squashfs_cmd, native_sysroot, pseudo=pseudo)
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def prepare_empty_partition_ext(self, rootfs, oe_builddir,
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native_sysroot):
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"""
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Prepare an empty ext2/3/4 partition.
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"""
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exec_cmd("truncate %s -s %d" % (rootfs, self.size * 1024))
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extra_imagecmd = "-i 8192"
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label_str = ""
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if self.label:
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label_str = "-L %s" % self.label
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mkfs_cmd = "mkfs.%s -F %s %s %s" % \
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(self.fstype, extra_imagecmd, label_str, rootfs)
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exec_native_cmd(mkfs_cmd, native_sysroot)
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def prepare_empty_partition_btrfs(self, rootfs, oe_builddir,
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native_sysroot):
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"""
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Prepare an empty btrfs partition.
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"""
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exec_cmd("truncate %s -s %d" % (rootfs, self.size * 1024))
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label_str = ""
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if self.label:
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label_str = "-L %s" % self.label
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mkfs_cmd = "mkfs.%s -b %d %s %s" % \
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(self.fstype, self.size * 1024, label_str, rootfs)
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exec_native_cmd(mkfs_cmd, native_sysroot)
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def prepare_empty_partition_vfat(self, rootfs, oe_builddir,
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native_sysroot):
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"""
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Prepare an empty vfat partition.
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"""
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blocks = self.size
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label_str = "-n boot"
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if self.label:
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label_str = "-n %s" % self.label
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dosfs_cmd = "mkdosfs %s -S 512 -C %s %d" % (label_str, rootfs, blocks)
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exec_native_cmd(dosfs_cmd, native_sysroot)
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chmod_cmd = "chmod 644 %s" % rootfs
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exec_cmd(chmod_cmd)
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def prepare_empty_partition_squashfs(self, cr_workdir, oe_builddir,
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native_sysroot):
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"""
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Prepare an empty squashfs partition.
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"""
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msger.warning("Creating of an empty squashfs %s partition was attempted. " \
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"Proceeding as requested." % self.mountpoint)
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path = "%s/fs_%s.%s" % (cr_workdir, self.label, self.fstype)
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os.path.isfile(path) and os.remove(path)
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# it is not possible to create a squashfs without source data,
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# thus prepare an empty temp dir that is used as source
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tmpdir = tempfile.mkdtemp()
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squashfs_cmd = "mksquashfs %s %s -noappend" % \
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(tmpdir, path)
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exec_native_cmd(squashfs_cmd, native_sysroot)
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os.rmdir(tmpdir)
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# get the rootfs size in the right units for kickstart (kB)
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du_cmd = "du -Lbks %s" % path
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out = exec_cmd(du_cmd)
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fs_size = out.split()[0]
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self.size = fs_size
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def prepare_swap_partition(self, cr_workdir, oe_builddir, native_sysroot):
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"""
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Prepare a swap partition.
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"""
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path = "%s/fs.%s" % (cr_workdir, self.fstype)
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exec_cmd("truncate %s -s %d" % (path, self.size * 1024))
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import uuid
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label_str = ""
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if self.label:
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label_str = "-L %s" % self.label
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mkswap_cmd = "mkswap %s -U %s %s" % (label_str, str(uuid.uuid1()), path)
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exec_native_cmd(mkswap_cmd, native_sysroot)
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