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5796b037d5
poky/scripts/lib/wic/partition.py
Paulo Neves 5796b037d5 wic: partition plugin wrongly assumes it is rootfs 
The partition plugin is used as the base for other plugins.
One of the methods the plugins use, is the prepare_rootfs
method.

The prepare_rootfs method wrongly assumes that the value
ROOTFS_SIZE from bitbake datastore is relevant to every
invocation of prepare_rootfs, which it clearly is not, for
example in the bootimg-partition case.

This commit adds an optional argument to prepare_rootfs
where a caller can tell prepare_rootfs if it is an actual
rootfs and whether related rootfs information retrieved from
bitbake is valid. The default behavior of this optional
argument is to assume that the invocation is an actual
rootfs, to maintain compatibility with previous
implementations.

(From OE-Core rev: 654d72d55194ec41bc1aacfcc6b2c8c9a305b042)

Signed-off-by: Paulo Neves <ptsneves@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2018-03-04 11:35:40 +00:00

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# 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 logging
import os
import uuid
from wic import WicError
from wic.misc import exec_cmd, exec_native_cmd, get_bitbake_var
from wic.pluginbase import PluginMgr
logger = logging.getLogger('wic')
class Partition():
def __init__(self, args, lineno):
self.args = args
self.active = args.active
self.align = args.align
self.disk = args.disk
self.device = None
self.extra_space = args.extra_space
self.exclude_path = args.exclude_path
self.fsopts = args.fsopts
self.fstype = args.fstype
self.label = args.label
self.mkfs_extraopts = args.mkfs_extraopts
self.mountpoint = args.mountpoint
self.no_table = args.no_table
self.num = None
self.overhead_factor = args.overhead_factor
self.part_name = args.part_name
self.part_type = args.part_type
self.rootfs_dir = args.rootfs_dir
self.size = args.size
self.fixed_size = args.fixed_size
self.source = args.source
self.sourceparams = args.sourceparams
self.system_id = args.system_id
self.use_uuid = args.use_uuid
self.uuid = args.uuid
self.fsuuid = args.fsuuid
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.
"""
logger.debug("Requested partition size for %s: %d",
self.mountpoint, self.size)
if not self.size:
return 0
requested_blocks = self.size
logger.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 get_rootfs_size(self, actual_rootfs_size=0):
"""
Calculate the required size of rootfs taking into consideration
--size/--fixed-size flags as well as overhead and extra space, as
specified in kickstart file. Raises an error if the
`actual_rootfs_size` is larger than fixed-size rootfs.
"""
if self.fixed_size:
rootfs_size = self.fixed_size
if actual_rootfs_size > rootfs_size:
raise WicError("Actual rootfs size (%d kB) is larger than "
"allowed size %d kB" %
(actual_rootfs_size, rootfs_size))
else:
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
logger.debug("Added %d extra blocks to %s to get to %d total blocks",
extra_blocks, self.mountpoint, rootfs_size)
return rootfs_size
@property
def disk_size(self):
"""
Obtain on-disk size of partition taking into consideration
--size/--fixed-size options.
"""
return self.fixed_size if self.fixed_size else self.size
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 not self.source:
if not self.size and not self.fixed_size:
raise WicError("The %s partition has a size of zero. Please "
"specify a non-zero --size/--fixed-size for that "
"partition." % self.mountpoint)
if self.fstype == "swap":
self.prepare_swap_partition(cr_workdir, oe_builddir,
native_sysroot)
self.source_file = "%s/fs.%s" % (cr_workdir, self.fstype)
else:
if self.fstype == 'squashfs':
raise WicError("It's not possible to create empty squashfs "
"partition '%s'" % (self.mountpoint))
rootfs = "%s/fs_%s.%s.%s" % (cr_workdir, self.label,
self.lineno, self.fstype)
if os.path.isfile(rootfs):
os.remove(rootfs)
prefix = "ext" if self.fstype.startswith("ext") else self.fstype
method = getattr(self, "prepare_empty_partition_" + prefix)
method(rootfs, oe_builddir, native_sysroot)
self.source_file = rootfs
return
plugins = PluginMgr.get_plugins('source')
if self.source not in plugins:
raise WicError("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))
srcparams_dict = {}
if self.sourceparams:
# Split sourceparams string of the form key1=val1[,key2=val2,...]
# into a dict. Also accepts valueless keys i.e. without =
splitted = self.sourceparams.split(',')
srcparams_dict = dict(par.split('=') for par in splitted if par)
plugin = PluginMgr.get_plugins('source')[self.source]
plugin.do_configure_partition(self, srcparams_dict, creator,
cr_workdir, oe_builddir, bootimg_dir,
kernel_dir, native_sysroot)
plugin.do_stage_partition(self, srcparams_dict, creator,
cr_workdir, oe_builddir, bootimg_dir,
kernel_dir, native_sysroot)
plugin.do_prepare_partition(self, srcparams_dict, creator,
cr_workdir, oe_builddir, bootimg_dir,
kernel_dir, rootfs_dir, native_sysroot)
plugin.do_post_partition(self, srcparams_dict, creator,
cr_workdir, oe_builddir, bootimg_dir,
kernel_dir, rootfs_dir, native_sysroot)
# further processing required Partition.size to be an integer, make
# sure that it is one
if not isinstance(self.size, int):
raise WicError("Partition %s internal size is not an integer. "
"This a bug in source plugin %s and needs to be fixed." %
(self.mountpoint, self.source))
if self.fixed_size and self.size > self.fixed_size:
raise WicError("File system image of partition %s is "
"larger (%d kB) than its allowed size %d kB" %
(self.mountpoint, self.size, self.fixed_size))
def prepare_rootfs(self, cr_workdir, oe_builddir, rootfs_dir,
native_sysroot, real_rootfs = True):
"""
Prepare content for a rootfs partition i.e. create a partition
and fill it from a /rootfs dir.
Currently handles ext2/3/4, btrfs, vfat and squashfs.
"""
p_prefix = os.environ.get("PSEUDO_PREFIX", "%s/usr" % native_sysroot)
p_localstatedir = os.environ.get("PSEUDO_LOCALSTATEDIR",
"%s/../pseudo" % get_bitbake_var("IMAGE_ROOTFS"))
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 " % get_bitbake_var("FAKEROOTCMD")
rootfs = "%s/rootfs_%s.%s.%s" % (cr_workdir, self.label,
self.lineno, self.fstype)
if os.path.isfile(rootfs):
os.remove(rootfs)
# Get rootfs size from bitbake variable if it's not set in .ks file
if not self.size and real_rootfs:
# Bitbake variable ROOTFS_SIZE is calculated in
# Image._get_rootfs_size method from meta/lib/oe/image.py
# using IMAGE_ROOTFS_SIZE, IMAGE_ROOTFS_ALIGNMENT,
# IMAGE_OVERHEAD_FACTOR and IMAGE_ROOTFS_EXTRA_SPACE
rsize_bb = get_bitbake_var('ROOTFS_SIZE')
if rsize_bb:
logger.warning('overhead-factor was specified, but size was not,'
' so bitbake variables will be used for the size.'
' In this case both IMAGE_OVERHEAD_FACTOR and '
'--overhead-factor will be applied')
self.size = int(round(float(rsize_bb)))
prefix = "ext" if self.fstype.startswith("ext") else self.fstype
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 = int(out.split()[0])
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])
rootfs_size = self.get_rootfs_size(actual_rootfs_size)
with open(rootfs, 'w') as sparse:
os.ftruncate(sparse.fileno(), rootfs_size * 1024)
extraopts = self.mkfs_extraopts or "-F -i 8192"
label_str = ""
if self.label:
label_str = "-L %s" % self.label
mkfs_cmd = "mkfs.%s %s %s %s -U %s -d %s" % \
(self.fstype, extraopts, rootfs, label_str, self.fsuuid, rootfs_dir)
exec_native_cmd(mkfs_cmd, native_sysroot, pseudo=pseudo)
mkfs_cmd = "fsck.%s -pvfD %s" % (self.fstype, rootfs)
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.
"""
du_cmd = "du -ks %s" % rootfs_dir
out = exec_cmd(du_cmd)
actual_rootfs_size = int(out.split()[0])
rootfs_size = self.get_rootfs_size(actual_rootfs_size)
with open(rootfs, 'w') as sparse:
os.ftruncate(sparse.fileno(), rootfs_size * 1024)
label_str = ""
if self.label:
label_str = "-L %s" % self.label
mkfs_cmd = "mkfs.%s -b %d -r %s %s %s -U %s %s" % \
(self.fstype, rootfs_size * 1024, rootfs_dir, label_str,
self.mkfs_extraopts, self.fsuuid, rootfs)
exec_native_cmd(mkfs_cmd, native_sysroot, pseudo=pseudo)
def prepare_rootfs_msdos(self, rootfs, oe_builddir, rootfs_dir,
native_sysroot, pseudo):
"""
Prepare content for a msdos/vfat rootfs partition.
"""
du_cmd = "du -bks %s" % rootfs_dir
out = exec_cmd(du_cmd)
blocks = int(out.split()[0])
rootfs_size = self.get_rootfs_size(blocks)
label_str = "-n boot"
if self.label:
label_str = "-n %s" % self.label
size_str = ""
if self.fstype == 'msdos':
size_str = "-F 16" # FAT 16
extraopts = self.mkfs_extraopts or '-S 512'
dosfs_cmd = "mkdosfs %s -i %s %s %s -C %s %d" % \
(label_str, self.fsuuid, size_str, extraopts, rootfs,
rootfs_size)
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)
prepare_rootfs_vfat = prepare_rootfs_msdos
def prepare_rootfs_squashfs(self, rootfs, oe_builddir, rootfs_dir,
native_sysroot, pseudo):
"""
Prepare content for a squashfs rootfs partition.
"""
extraopts = self.mkfs_extraopts or '-noappend'
squashfs_cmd = "mksquashfs %s %s %s" % \
(rootfs_dir, rootfs, extraopts)
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.
"""
size = self.disk_size
with open(rootfs, 'w') as sparse:
os.ftruncate(sparse.fileno(), size * 1024)
extraopts = self.mkfs_extraopts or "-i 8192"
label_str = ""
if self.label:
label_str = "-L %s" % self.label
mkfs_cmd = "mkfs.%s -F %s %s -U %s %s" % \
(self.fstype, extraopts, label_str, self.fsuuid, rootfs)
exec_native_cmd(mkfs_cmd, native_sysroot)
def prepare_empty_partition_btrfs(self, rootfs, oe_builddir,
native_sysroot):
"""
Prepare an empty btrfs partition.
"""
size = self.disk_size
with open(rootfs, 'w') as sparse:
os.ftruncate(sparse.fileno(), size * 1024)
label_str = ""
if self.label:
label_str = "-L %s" % self.label
mkfs_cmd = "mkfs.%s -b %d %s -U %s %s %s" % \
(self.fstype, self.size * 1024, label_str, self.fsuuid,
self.mkfs_extraopts, rootfs)
exec_native_cmd(mkfs_cmd, native_sysroot)
def prepare_empty_partition_msdos(self, rootfs, oe_builddir,
native_sysroot):
"""
Prepare an empty vfat partition.
"""
blocks = self.disk_size
label_str = "-n boot"
if self.label:
label_str = "-n %s" % self.label
size_str = ""
if self.fstype == 'msdos':
size_str = "-F 16" # FAT 16
extraopts = self.mkfs_extraopts or '-S 512'
dosfs_cmd = "mkdosfs %s -i %s %s %s -C %s %d" % \
(label_str, self.fsuuid, extraopts, size_str, rootfs,
blocks)
exec_native_cmd(dosfs_cmd, native_sysroot)
chmod_cmd = "chmod 644 %s" % rootfs
exec_cmd(chmod_cmd)
prepare_empty_partition_vfat = prepare_empty_partition_msdos
def prepare_swap_partition(self, cr_workdir, oe_builddir, native_sysroot):
"""
Prepare a swap partition.
"""
path = "%s/fs.%s" % (cr_workdir, self.fstype)
with open(path, 'w') as sparse:
os.ftruncate(sparse.fileno(), self.size * 1024)
label_str = ""
if self.label:
label_str = "-L %s" % self.label
mkswap_cmd = "mkswap %s -U %s %s" % (label_str, self.fsuuid, path)
exec_native_cmd(mkswap_cmd, native_sysroot)
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