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