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#
# Copyright (c) 2013-2016 Intel Corporation.
#
# SPDX-License-Identifier: GPL-2.0-only
#
# 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.include_path = args.include_path
self.change_directory = args.change_directory
self.fsopts = args.fsopts
self.fstype = args.fstype
self.label = args.label
self.use_label = args.use_label
self.mkfs_extraopts = args.mkfs_extraopts
self.mountpoint = args.mountpoint
self.no_table = args.no_table
self.num = None
self.offset = args.offset
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.type = args.type
self.updated_fstab_path = None
self.has_fstab = False
self.update_fstab_in_rootfs = False
self.lineno = lineno
self.source_file = ""
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, updated_fstab_path):
"""
Prepare content for individual partitions, depending on
partition command parameters.
"""
self.updated_fstab_path = updated_fstab_path
if self.updated_fstab_path and not (self.fstype.startswith("ext") or self.fstype == "msdos"):
self.update_fstab_in_rootfs = True
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('=', 1) 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, pseudo_dir = None):
"""
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.
"""
rootfs = "%s/rootfs_%s.%s.%s" % (cr_workdir, self.label,
self.lineno, self.fstype)
if os.path.isfile(rootfs):
os.remove(rootfs)
p_prefix = os.environ.get("PSEUDO_PREFIX", "%s/usr" % native_sysroot)
if (pseudo_dir):
# Canonicalize the ignore paths. This corresponds to
# calling oe.path.canonicalize(), which is used in bitbake.conf.
ignore_paths = [rootfs] + (get_bitbake_var("PSEUDO_IGNORE_PATHS") or "").split(",")
canonical_paths = []
for path in ignore_paths:
if "$" not in path:
trailing_slash = path.endswith("/") and "/" or ""
canonical_paths.append(os.path.realpath(path) + trailing_slash)
ignore_paths = ",".join(canonical_paths)
pseudo = "export PSEUDO_PREFIX=%s;" % p_prefix
pseudo += "export PSEUDO_LOCALSTATEDIR=%s;" % pseudo_dir
pseudo += "export PSEUDO_PASSWD=%s;" % rootfs_dir
pseudo += "export PSEUDO_NOSYMLINKEXP=1;"
pseudo += "export PSEUDO_IGNORE_PATHS=%s;" % ignore_paths
pseudo += "%s " % get_bitbake_var("FAKEROOTCMD")
else:
pseudo = None
if not self.size and real_rootfs:
# The rootfs size is not set in .ks file so try to get it
# from bitbake variable
rsize_bb = get_bitbake_var('ROOTFS_SIZE')
rdir = get_bitbake_var('IMAGE_ROOTFS')
if rsize_bb and rdir == rootfs_dir:
# 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
self.size = int(round(float(rsize_bb)))
else:
# Bitbake variable ROOTFS_SIZE is not defined so compute it
# from the rootfs_dir size using the same logic found in
# get_rootfs_size() from meta/classes/image.bbclass
du_cmd = "du -ks %s" % rootfs_dir
out = exec_cmd(du_cmd)
self.size = int(out.split()[0])
prefix = "ext" if self.fstype.startswith("ext") else self.fstype
method = getattr(self, "prepare_rootfs_" + prefix)
method(rootfs, cr_workdir, 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, cr_workdir, 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)
if self.updated_fstab_path and self.has_fstab:
debugfs_script_path = os.path.join(cr_workdir, "debugfs_script")
with open(debugfs_script_path, "w") as f:
f.write("cd etc\n")
f.write("rm fstab\n")
f.write("write %s fstab\n" % (self.updated_fstab_path))
debugfs_cmd = "debugfs -w -f %s %s" % (debugfs_script_path, rootfs)
exec_native_cmd(debugfs_cmd, native_sysroot)
mkfs_cmd = "fsck.%s -pvfD %s" % (self.fstype, rootfs)
exec_native_cmd(mkfs_cmd, native_sysroot, pseudo=pseudo)
self.check_for_Y2038_problem(rootfs, native_sysroot)
def prepare_rootfs_btrfs(self, rootfs, cr_workdir, 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, cr_workdir, 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)
if self.updated_fstab_path and self.has_fstab:
mcopy_cmd = "mcopy -i %s %s ::/etc/fstab" % (rootfs, self.updated_fstab_path)
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, cr_workdir, 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)
self.check_for_Y2038_problem(rootfs, 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)
def check_for_Y2038_problem(self, rootfs, native_sysroot):
"""
Check if the filesystem is affected by the Y2038 problem
(Y2038 problem = 32 bit time_t overflow in January 2038)
"""
def get_err_str(part):
err = "The {} filesystem {} has no Y2038 support."
if part.mountpoint:
args = [part.fstype, "mounted at %s" % part.mountpoint]
elif part.label:
args = [part.fstype, "labeled '%s'" % part.label]
elif part.part_name:
args = [part.fstype, "in partition '%s'" % part.part_name]
else:
args = [part.fstype, "in partition %s" % part.num]
return err.format(*args)
# ext2 and ext3 are always affected by the Y2038 problem
if self.fstype in ["ext2", "ext3"]:
logger.warn(get_err_str(self))
return
ret, out = exec_native_cmd("dumpe2fs %s" % rootfs, native_sysroot)
# if ext4 is affected by the Y2038 problem depends on the inode size
for line in out.splitlines():
if line.startswith("Inode size:"):
size = int(line.split(":")[1].strip())
if size < 256:
logger.warn("%s Inodes (of size %d) are too small." %
(get_err_str(self), size))
break
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