mirror of
git://git.yoctoproject.org/poky.git
synced 2025-07-19 21:09:03 +02:00
adf5e2956c
Disk operations were spread over DirectPlugin, DiskImage and Image code making the code hard to understand. Renamed Image class to PartitionedImage. Removed DiskImage class. Moved disk operations to PartitionedImage. There was an implicit support for multiple disks: if different devices were specified in .wks file (e.g. --ondisk sda and --ondisk sdb), wic would theoretically generate multiple images. This is quite confusing option and the code supporting it was broken for a long time. The same effect (multiple output images) can be achieved in obvious and clear way - by using multiple .wks files. This functionality was removed. PartitionedImage works only with one image. This makes the code less complex and easier to maintain. (From OE-Core rev: 4dc9dbfc7fbc16d349a019e8973d50905cd28244) Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
302 lines
13 KiB
Python
302 lines
13 KiB
Python
#!/usr/bin/env python -tt
|
|
#
|
|
# Copyright (c) 2009, 2010, 2011 Intel, Inc.
|
|
# Copyright (c) 2007, 2008 Red Hat, Inc.
|
|
# Copyright (c) 2008 Daniel P. Berrange
|
|
# Copyright (c) 2008 David P. Huff
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify it
|
|
# under the terms of the GNU General Public License as published by the Free
|
|
# Software Foundation; version 2 of the License
|
|
#
|
|
# 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., 59
|
|
# Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
import os
|
|
|
|
from wic import msger
|
|
from wic.utils.errors import ImageError
|
|
from wic.utils.misc import exec_native_cmd
|
|
from wic.filemap import sparse_copy
|
|
|
|
# Overhead of the MBR partitioning scheme (just one sector)
|
|
MBR_OVERHEAD = 1
|
|
|
|
# Overhead of the GPT partitioning scheme
|
|
GPT_OVERHEAD = 34
|
|
|
|
# Size of a sector in bytes
|
|
SECTOR_SIZE = 512
|
|
|
|
class PartitionedImage():
|
|
"""
|
|
Partitioned image in a file.
|
|
"""
|
|
|
|
def __init__(self, path, ptable_format, native_sysroot=None):
|
|
self.path = path # Path to the image file
|
|
self.numpart = 0 # Number of allocated partitions
|
|
self.realpart = 0 # Number of partitions in the partition table
|
|
self.offset = 0 # Offset of next partition (in sectors)
|
|
self.min_size = 0 # Minimum required disk size to fit
|
|
# all partitions (in bytes)
|
|
self.ptable_format = ptable_format # Partition table format
|
|
# Disk system identifier
|
|
self.identifier = int.from_bytes(os.urandom(4), 'little')
|
|
|
|
self.partitions = []
|
|
self.partimages = []
|
|
# Size of a sector used in calculations
|
|
self.sector_size = SECTOR_SIZE
|
|
self.native_sysroot = native_sysroot
|
|
|
|
def add_partition(self, part):
|
|
"""
|
|
Add the next partition. Partitions have to be added in the
|
|
first-to-last order.
|
|
"""
|
|
part.ks_pnum = len(self.partitions)
|
|
|
|
# Converting kB to sectors for parted
|
|
part.size_sec = part.disk_size * 1024 // self.sector_size
|
|
|
|
self.partitions.append(part)
|
|
|
|
def layout_partitions(self):
|
|
""" Layout the partitions, meaning calculate the position of every
|
|
partition on the disk. The 'ptable_format' parameter defines the
|
|
partition table format and may be "msdos". """
|
|
|
|
msger.debug("Assigning %s partitions to disks" % self.ptable_format)
|
|
|
|
# Go through partitions in the order they are added in .ks file
|
|
for num in range(len(self.partitions)):
|
|
part = self.partitions[num]
|
|
|
|
if self.ptable_format == 'msdos' and part.part_type:
|
|
# The --part-type can also be implemented for MBR partitions,
|
|
# in which case it would map to the 1-byte "partition type"
|
|
# filed at offset 3 of the partition entry.
|
|
raise ImageError("setting custom partition type is not " \
|
|
"implemented for msdos partitions")
|
|
|
|
# Get the disk where the partition is located
|
|
self.numpart += 1
|
|
if not part.no_table:
|
|
self.realpart += 1
|
|
|
|
if self.numpart == 1:
|
|
if self.ptable_format == "msdos":
|
|
overhead = MBR_OVERHEAD
|
|
elif self.ptable_format == "gpt":
|
|
overhead = GPT_OVERHEAD
|
|
|
|
# Skip one sector required for the partitioning scheme overhead
|
|
self.offset += overhead
|
|
|
|
if self.realpart > 3:
|
|
# Reserve a sector for EBR for every logical partition
|
|
# before alignment is performed.
|
|
if self.ptable_format == "msdos":
|
|
self.offset += 1
|
|
|
|
if part.align:
|
|
# If not first partition and we do have alignment set we need
|
|
# to align the partition.
|
|
# FIXME: This leaves a empty spaces to the disk. To fill the
|
|
# gaps we could enlargea the previous partition?
|
|
|
|
# Calc how much the alignment is off.
|
|
align_sectors = self.offset % (part.align * 1024 // self.sector_size)
|
|
|
|
if align_sectors:
|
|
# If partition is not aligned as required, we need
|
|
# to move forward to the next alignment point
|
|
align_sectors = (part.align * 1024 // self.sector_size) - align_sectors
|
|
|
|
msger.debug("Realignment for %s%s with %s sectors, original"
|
|
" offset %s, target alignment is %sK." %
|
|
(part.disk, self.numpart, align_sectors,
|
|
self.offset, part.align))
|
|
|
|
# increase the offset so we actually start the partition on right alignment
|
|
self.offset += align_sectors
|
|
|
|
part.start = self.offset
|
|
self.offset += part.size_sec
|
|
|
|
part.type = 'primary'
|
|
if not part.no_table:
|
|
part.num = self.realpart
|
|
else:
|
|
part.num = 0
|
|
|
|
if self.ptable_format == "msdos":
|
|
# only count the partitions that are in partition table
|
|
if len([p for p in self.partitions if not p.no_table]) > 4:
|
|
if self.realpart > 3:
|
|
part.type = 'logical'
|
|
part.num = self.realpart + 1
|
|
|
|
msger.debug("Assigned %s to %s%d, sectors range %d-%d size %d "
|
|
"sectors (%d bytes)." \
|
|
% (part.mountpoint, part.disk, part.num,
|
|
part.start, self.offset - 1,
|
|
part.size_sec, part.size_sec * self.sector_size))
|
|
|
|
# Once all the partitions have been layed out, we can calculate the
|
|
# minumim disk size
|
|
self.min_size = self.offset
|
|
if self.ptable_format == "gpt":
|
|
self.min_size += GPT_OVERHEAD
|
|
|
|
self.min_size *= self.sector_size
|
|
|
|
def _create_partition(self, device, parttype, fstype, start, size):
|
|
""" Create a partition on an image described by the 'device' object. """
|
|
|
|
# Start is included to the size so we need to substract one from the end.
|
|
end = start + size - 1
|
|
msger.debug("Added '%s' partition, sectors %d-%d, size %d sectors" %
|
|
(parttype, start, end, size))
|
|
|
|
cmd = "parted -s %s unit s mkpart %s" % (device, parttype)
|
|
if fstype:
|
|
cmd += " %s" % fstype
|
|
cmd += " %d %d" % (start, end)
|
|
|
|
return exec_native_cmd(cmd, self.native_sysroot)
|
|
|
|
def create(self):
|
|
msger.debug("Creating sparse file %s" % self.path)
|
|
with open(self.path, 'w') as sparse:
|
|
os.ftruncate(sparse.fileno(), self.min_size)
|
|
|
|
msger.debug("Initializing partition table for %s" % self.path)
|
|
exec_native_cmd("parted -s %s mklabel %s" %
|
|
(self.path, self.ptable_format), self.native_sysroot)
|
|
|
|
msger.debug("Set disk identifier %x" % self.identifier)
|
|
with open(self.path, 'r+b') as img:
|
|
img.seek(0x1B8)
|
|
img.write(self.identifier.to_bytes(4, 'little'))
|
|
|
|
msger.debug("Creating partitions")
|
|
|
|
for part in self.partitions:
|
|
if part.num == 0:
|
|
continue
|
|
|
|
if self.ptable_format == "msdos" and part.num == 5:
|
|
# Create an extended partition (note: extended
|
|
# partition is described in MBR and contains all
|
|
# logical partitions). The logical partitions save a
|
|
# sector for an EBR just before the start of a
|
|
# partition. The extended partition must start one
|
|
# sector before the start of the first logical
|
|
# partition. This way the first EBR is inside of the
|
|
# extended partition. Since the extended partitions
|
|
# starts a sector before the first logical partition,
|
|
# add a sector at the back, so that there is enough
|
|
# room for all logical partitions.
|
|
self._create_partition(self.path, "extended",
|
|
None, part.start - 1,
|
|
self.offset - part.start + 1)
|
|
|
|
if part.fstype == "swap":
|
|
parted_fs_type = "linux-swap"
|
|
elif part.fstype == "vfat":
|
|
parted_fs_type = "fat32"
|
|
elif part.fstype == "msdos":
|
|
parted_fs_type = "fat16"
|
|
elif part.fstype == "ontrackdm6aux3":
|
|
parted_fs_type = "ontrackdm6aux3"
|
|
else:
|
|
# Type for ext2/ext3/ext4/btrfs
|
|
parted_fs_type = "ext2"
|
|
|
|
# Boot ROM of OMAP boards require vfat boot partition to have an
|
|
# even number of sectors.
|
|
if part.mountpoint == "/boot" and part.fstype in ["vfat", "msdos"] \
|
|
and part.size_sec % 2:
|
|
msger.debug("Subtracting one sector from '%s' partition to " \
|
|
"get even number of sectors for the partition" % \
|
|
part.mountpoint)
|
|
part.size_sec -= 1
|
|
|
|
self._create_partition(self.path, part.type,
|
|
parted_fs_type, part.start, part.size_sec)
|
|
|
|
if part.part_type:
|
|
msger.debug("partition %d: set type UID to %s" % \
|
|
(part.num, part.part_type))
|
|
exec_native_cmd("sgdisk --typecode=%d:%s %s" % \
|
|
(part.num, part.part_type,
|
|
self.path), self.native_sysroot)
|
|
|
|
if part.uuid and self.ptable_format == "gpt":
|
|
msger.debug("partition %d: set UUID to %s" % \
|
|
(part.num, part.uuid))
|
|
exec_native_cmd("sgdisk --partition-guid=%d:%s %s" % \
|
|
(part.num, part.uuid, self.path),
|
|
self.native_sysroot)
|
|
|
|
if part.label and self.ptable_format == "gpt":
|
|
msger.debug("partition %d: set name to %s" % \
|
|
(part.num, part.label))
|
|
exec_native_cmd("parted -s %s name %d %s" % \
|
|
(self.path, part.num, part.label),
|
|
self.native_sysroot)
|
|
|
|
if part.active:
|
|
flag_name = "legacy_boot" if self.ptable_format == 'gpt' else "boot"
|
|
msger.debug("Set '%s' flag for partition '%s' on disk '%s'" % \
|
|
(flag_name, part.num, self.path))
|
|
exec_native_cmd("parted -s %s set %d %s on" % \
|
|
(self.path, part.num, flag_name),
|
|
self.native_sysroot)
|
|
if part.system_id:
|
|
exec_native_cmd("sfdisk --part-type %s %s %s" % \
|
|
(self.path, part.num, part.system_id),
|
|
self.native_sysroot)
|
|
|
|
# Parted defaults to enabling the lba flag for fat16 partitions,
|
|
# which causes compatibility issues with some firmware (and really
|
|
# isn't necessary).
|
|
if parted_fs_type == "fat16":
|
|
if self.ptable_format == 'msdos':
|
|
msger.debug("Disable 'lba' flag for partition '%s' on disk '%s'" % \
|
|
(part.num, self.path))
|
|
exec_native_cmd("parted -s %s set %d lba off" % \
|
|
(self.path, part.num),
|
|
self.native_sysroot)
|
|
|
|
def cleanup(self):
|
|
# remove partition images
|
|
for image in self.partimages:
|
|
os.remove(image)
|
|
|
|
def assemble(self):
|
|
msger.debug("Installing partitions")
|
|
|
|
for part in self.partitions:
|
|
source = part.source_file
|
|
if source:
|
|
# install source_file contents into a partition
|
|
sparse_copy(source, self.path, part.start * self.sector_size)
|
|
|
|
msger.debug("Installed %s in partition %d, sectors %d-%d, "
|
|
"size %d sectors" % \
|
|
(source, part.num, part.start,
|
|
part.start + part.size_sec - 1, part.size_sec))
|
|
|
|
partimage = self.path + '.p%d' % part.num
|
|
os.rename(source, partimage)
|
|
self.partimages.append(partimage)
|