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# Copyright 1999-2006 Gentoo Foundation
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# This source code is distributed under the terms of version 2 of the GNU
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# General Public License as published by the Free Software Foundation, a copy
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# of which can be found in the main directory of this project.
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import commands, string, os, parted
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from glob import glob
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from GLIException import *
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import GLIUtility
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import time
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MEGABYTE = 1024 * 1024
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# these are here so that we can change them easily in future
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# the values were chosen to represent perfect floating point representations
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FREE_MINOR_FRAC_PRI = 1.0/32.0
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FREE_MINOR_FRAC_LOG = 1.0/8.0
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supported_filesystems = {
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'all': ( 'ext2', 'ext3', 'linux-swap', 'xfs', 'jfs', 'reiserfs' ),
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'x86': ( 'ntfs', 'fat16', 'fat32' ),
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'amd64': ( 'ntfs', 'fat16', 'fat32' ),
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'ppc': ( 'reiserfs', 'apple_bootstrap', 'hfs' )
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}
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labelinfo = {
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'msdos': { 'ignoredparts': [], 'extended': True },
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'mac': { 'ignoredparts': [1], 'extended': False },
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'sun': { 'ignoredparts': [3], 'extended': False },
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'loop': { 'ignoredparts': [], 'extended': False }
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}
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archinfo = {
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'sparc': 'sun',
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'hppa': 'msdos',
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'x86': 'msdos',
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'amd64': 'msdos',
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'ppc': 'mac'
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}
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##
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# This class provides a partitioning abstraction for the frontends
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class Device:
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"Class representing a partitionable device."
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_device = None
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_partitions = None
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_geometry = None
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_parted_dev = None
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_parted_disk = None
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_arch = None
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_disklabel = None
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##
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# Initialization function for Device class
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# @param device Device node (e.g. /dev/hda) of device being represented
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# @param arch Architecture that we're partition for (defaults to 'x86' for now)
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def __init__(self, device, arch="x86"):
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self._device = device
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self._arch = arch
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self._partitions = []
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self._geometry = {}
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self._parted_dev = parted.PedDevice.get(self._device)
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try:
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self._parted_disk = parted.PedDisk.new(self._parted_dev)
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except:
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self._parted_disk = self._parted_dev.disk_new_fresh(parted.disk_type_get(archinfo[self._arch]))
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self._disklabel = self._parted_disk.type.name
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self._labelinfo = labelinfo[self._disklabel]
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self.set_disk_geometry_from_disk()
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self.set_partitions_from_disk()
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def __getitem__(self, name):
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return self.get_partition(name)
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def __iter__(self):
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for part in self.get_ordered_partition_list():
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yield part
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##
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# Returns list of supported filesystems based on arch
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def get_supported_filesystems(self):
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return supported_filesystems['all'] + supported_filesystems[self._arch]
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##
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# Sets disk geometry info from disk. This function is used internally by __init__()
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def set_disk_geometry_from_disk(self):
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self._geometry = {
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'sector_size': self._parted_dev.sector_size,
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'total_bytes': self._parted_dev.length * self._parted_dev.sector_size,
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'heads': self._parted_dev.heads,
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'cylinders': self._parted_dev.cylinders,
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'sectors': self._parted_dev.sectors,
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'cylinder_bytes': self._geometry['heads'] * self._geometry['sectors'] * self._parted_dev.sector_size,
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'total_sectors': self._parted_dev.length,
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'sectors_in_cylinder': self._parted_dev.heads * self._parted_dev.sectors,
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'total_mb': long((self._parted_dev.length * self._parted_dev.sector_size) / MEGABYTE)
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}
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##
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# Sets partition info from disk.
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def set_partitions_from_disk(self):
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self._partitions = []
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parted_part = self._parted_disk.next_partition()
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while parted_part:
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# Make sure it's a physical partition or unallocated space
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if parted_part.num >= 1 or parted_part.type_name == "free":
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self._partitions.append(Partition(self, parted_part))
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parted_part = self._parted_disk.next_partition(parted_part)
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##
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# Returns the partition object with the specified minor
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# @param minor Minor number of partition object to get
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def get_partition(self, minor):
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for part in self._partitions:
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if part.get_minor() == minor:
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return part
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return None
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def get_partition_position(self, minor):
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for i, part in enumerate(self._partitions):
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if part.get_minor() == minor:
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return i
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return -1
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##
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# Returns name of device (e.g. /dev/hda) being represented
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def get_device(self):
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return self._device
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##
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# Uses magic to apply the recommended partition layout
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def do_recommended(self):
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freeidx = -1
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free_part = None
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recommended_parts = [ { 'type': "ext2", 'size': 100, 'mountpoint': "/boot" },
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{ 'type': "linux-swap", 'size': 512, 'mountpoint': "" },
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{ 'type': "ext3", 'size': "*", 'mountpoint': "/" } ]
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to_create = []
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physical_memory = int(GLIUtility.spawn(r"free -m | egrep '^Mem:' | sed -e 's/^Mem: \+//' -e 's/ \+.\+$//'", return_output=True)[1].strip())
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# parts = self.get_ordered_partition_list()
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# Search for concurrent unallocated space >=4GB
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for idx, part in self._partitions:
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if part['type'] == "free" and part['mb'] >= 4096:
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freeidx = idx
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free_part = part
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break
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else:
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raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "You do not have atleast 4GB of concurrent unallocated space. Please remove some partitions and try again.")
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remaining_free = free_part['mb']
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# XXX: I left off here
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for newpart in recommended_parts:
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# extended/logical partitions suck like a hoover
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if self._labelinfo['extended'] and free_minor == (3 + FREE_MINOR_FRAC_PRI) and not newpart == recommended_parts[-1]:
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if self.get_extended_partition():
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raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "This code is not yet robust enough to handle automatic partitioning with your current layout.")
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to_create.append({ 'type': "extended", 'size': remaining_free, 'mountpoint': "", 'free_minor': free_minor })
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free_minor = 4 + FREE_MINOR_FRAC_LOG
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newpart['free_minor'] = free_minor
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# Small hack to calculate optimal swap partition size
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if newpart['type'] == "linux-swap" and physical_memory:
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newpart['size'] = physical_memory * 2
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if newpart['size'] > 1024:
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newpart['size'] = 1024
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to_create.append(newpart)
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free_minor = free_minor + 1
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if not newpart['size'] == "*":
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remaining_free = remaining_free - newpart['size']
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for newpart in to_create:
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if newpart['size'] == "*":
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# This doesn't seem quite right...it should probably be set to remaining_free
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# newpart['size'] = self.get_partition(newpart['free_minor']).get_mb()
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newpart['size'] = remaining_free
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self.add_partition(newpart['free_minor'], newpart['size'], 0, 0, newpart['type'], mountpoint=newpart['mountpoint'])
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def _megabytes_to_sectors(self, mb, sector_bytes=512):
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return long(mb * MEGABYTE / sector_bytes)
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def _sectors_to_megabytes(self, sectors, sector_bytes=512):
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return float((float(sectors) * sector_bytes)/ float(MEGABYTE))
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def _wait_for_device_node(self, devnode):
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if GLIUtility.is_file("/sbin/udevsettle"):
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GLIUtility.spawn("/sbin/udevsettle")
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if not GLIUtility.is_file(devnode):
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GLIUtility.spawn("/sbin/udevsettle")
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else:
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for i in range(0, 10):
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if GLIUtility.is_file(devnode):
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break
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time.sleep(1)
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time.sleep(1)
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for i in range(0, 10):
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if GLIUtility.is_file(devnode):
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break
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time.sleep(1)
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##
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# Adds a new partition to the partition info
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# @param freeidx minor of unallocated space partition is being created in
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# @param mb size of partition in MB
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# @param type Partition type (ext2, ext3, fat32, linux-swap, free, extended, etc.)
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def add_partition(self, freeidx, mb, fs, pregap=0):
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types = { 'primary': parted.PARTITION_PRIMARY, 'extended': parted.PARTITION_EXTENDED, 'logical': parted.PARTITION_LOGICAL }
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fs_types = {}
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fstype = None
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try:
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free_part = self._partitions[freeidx]
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except:
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# raise an exception here
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pass
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if mb > free_part['mb']:
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# raise an exception here
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pass
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# Enumerate supported filesystem types
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fs_type = parted.file_system_type_get_next()
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while fs_type:
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fs_types[fs_type.name] = fs_type
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fs_type = parted.file_system_type_get_next(fs_type)
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# apple_bootstrap is a "magic" hfs
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if fs == "apple_bootstrap":
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fs = "hfs"
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# grab relevant parted filesystemtype object
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if fs:
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fstype = fs_types[fs]
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# determine correct partition type
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parttype = "primary"
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if fs == "extended":
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fstype = None
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parttype = "extended"
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elif free_part.is_logical():
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parttype = "logical"
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# figure out start/end sectors
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start = free_part['start'] + self._megabytes_to_sectors(pregap)
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end = start + self._megabytes_to_sectors(mb)
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newpart = self._parted_disk.partition_new(types[parttype], fstype, start, end)
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constraint = self._parted_disk.dev.constraint_any()
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constraint.start_range.set_start(start)
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constraint.start_range.set_end(start)
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self._parted_disk.add_partition(newpart, constraint)
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self._parted_disk.commit()
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self.set_partitions_from_disk()
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##
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# Removes partition from partition info
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# @param minor Minor of partition to remove
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def delete_partition(self, partidx):
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try:
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tmp_part = self._partitions[partidx]
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except:
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# raise exception here
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pass
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if tmp_part['minor'] < 1:
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# raise an exception here
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pass
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try:
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self._parted_disk.delete_partition(self._parted_disk.get_partition(tmp_part['minor']))
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except:
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# raise an exception here
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pass
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self._parted_disk.commit()
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self.set_partitions_from_disk()
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##
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# This function clears the partition table
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def clear_partitions(self, disklabel=None):
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if not disklabel:
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disklabel = archinfo[self._arch]
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self._parted_disk = self._parted_dev.disk_new_fresh(parted.disk_type_get(disklabel))
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self._disklabel = disklabel
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self._parted_disk.commit()
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self.set_partitions_from_disk()
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##
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# Returns an ordered list (disk order) of partition minors
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def get_ordered_partition_list(self):
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partlist = []
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for part in self._partitions:
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partlist.append(part.get_minor())
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return partlist
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##
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# Returns the minor of the extended partition, if any
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def get_extended_partition(self):
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for part in self._partitions:
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if part.is_extended():
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return part.get_minor()
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return 0
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##
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# Returns the drive model
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def get_model(self):
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return self._parted_dev.model
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##
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# Returns the disklabel type
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def get_disklabel(self):
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return self._disklabel
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##
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# Returns all the geometry information
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def get_geometry(self):
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return self._geometry
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##
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# Returns partition info dictionary
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def get_partitions(self):
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return self._partitions
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##
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# This class represents a partition within a GLIStorageDevice object
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class Partition:
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"Class representing a single partition within a Device object"
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_device = None
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##
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# Initialization function for the Partition class
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# @param device Parent GLIStorageDevice object
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# @param parted_part parted.Partition object
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def __init__(self, device, parted_part):
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self._device = device
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self._start = parted_part.geom.start
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self._end = parted_part.geom.end
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self._type = ""
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self._minor = parted_part.minor
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self._part_mb = float((self._end - self._start + 1) * device._geometry['sector_bytes'] / MEGABYTE)
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self._part_name = ""
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self._resizeable = False
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# determine the /dev node that refers to this partition
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tmpdevice = device.get_device()
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label_type = device._parted_disk.type.name
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if label_type == "loop":
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self._devnode = tmpdevice
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elif device[-1] in "0123456789":
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self._devnode = tmpdevice + "p" + str(self._minor)
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else:
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self._devnode = tmpdevice + str(self._minor)
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if not parted_part.type_name == "free":
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if parted_part.fs_type:
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self._type = parted_part.fs_type.name
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if self._type == "hfs" and parted_part.is_flag_available(1) and parted_part.get_flag(1):
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self._type = "apple_bootstrap"
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else:
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# Add additional partition identification code here
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pass
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if parted_part.type == 2: self._type = "extended"
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if device._parted_disk.type.check_feature(parted.DISK_TYPE_PARTITION_NAME):
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self._part_name = parted_part.get_name()
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# The 10 is completely arbitrary. If flags seem to be missed, this number should be increased
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for flag in range(0, 10):
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if parted_part.is_flag_available(flag) and parted_part.get_flag(flag):
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self._flags.append(flag)
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if type == "ext2" or type == "ext3":
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block_size = long(string.strip(commands.getoutput("dumpe2fs -h " + self._devnode + r" 2>&1 | grep -e '^Block size:' | sed -e 's/^Block size:\s\+//'")))
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free_blocks = long(string.strip(commands.getoutput("dumpe2fs -h " + self._devnode + r" 2>&1 | grep -e '^Free blocks:' | sed -e 's/^Free blocks:\s\+//'")))
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free_bytes = long(block_size * free_blocks)
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# can't hurt to pad (the +50) it a bit since this is really just a guess
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self._min_mb_for_resize = self._mb - long(free_bytes / MEGABYTE) + 50
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self._resizeable = True
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elif type == "ntfs":
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min_bytes = long(commands.getoutput("ntfsresize -f --info " + self._devnode + " | grep -e '^You might resize' | sed -e 's/You might resize at //' -e 's/ bytes or .\+//'"))
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self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 50
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self._resizeable = True
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else:
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try:
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parted_fs = parted_part.geom.file_system_open()
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resize_constraint = parted_fs.get_resize_constraint()
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min_bytes = resize_constraint.min_size * self._device._sector_bytes
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self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
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self._resizeable = True
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except:
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self._resizeable = False
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def __getitem__(self, name):
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tmpdict = {
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'start': self.get_start,
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'end': self.get_end,
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'type': self.get_type,
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'minor': self.get_minor,
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'mb': self.get_mb,
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'flags': self.get_flags,
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'name': self.get_name,
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'devnode': self.get_devnode
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}
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if name in tmpdict:
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return tmpdict[name]()
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else:
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raise ValueError(name + " is not a valid attribute!")
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def __setitem__(self, name, value):
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tmpdict = {
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'flags': self.set_flags,
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'name': self.set_name
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}
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| 399 |
if name in tmpdict:
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tmpdict[name](value)
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else:
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raise ValueError(name + " is not a valid attribute!")
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##
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# Returns the dev node that this partition will have
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def get_devnode(self):
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return self._devnode
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##
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# Returns whether or not the partition is extended
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def is_extended(self):
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if self._type == "extended":
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return True
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else:
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return False
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##
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# Returns whether or not the partition is logical
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def is_logical(self):
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| 420 |
if self._type == "free":
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| 421 |
if int(self._minor) + FREE_MINOR_FRAC_LOG == self._minor:
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return True
|
| 423 |
else:
|
| 424 |
return False
|
| 425 |
elif self._device._labelinfo['extended'] and self._minor > 4:
|
| 426 |
return True
|
| 427 |
else:
|
| 428 |
return False
|
| 429 |
|
| 430 |
##
|
| 431 |
# Returns a list of logical partitions if this is an extended partition
|
| 432 |
def get_logicals(self):
|
| 433 |
if not self.is_extended():
|
| 434 |
return None
|
| 435 |
logicals = []
|
| 436 |
for part in self._device._partitions:
|
| 437 |
if part.get_minor() > 4 and not part.get_type() == "free":
|
| 438 |
logicals.append(part.get_minor())
|
| 439 |
return logicals
|
| 440 |
|
| 441 |
##
|
| 442 |
# Returns the start sector for the partition
|
| 443 |
def get_start(self):
|
| 444 |
return long(self._start)
|
| 445 |
|
| 446 |
##
|
| 447 |
# Returns end sector for the partition
|
| 448 |
def get_end(self):
|
| 449 |
return long(self._end)
|
| 450 |
|
| 451 |
##
|
| 452 |
# Returns size of partition in MB
|
| 453 |
def get_mb(self):
|
| 454 |
return self._mb
|
| 455 |
|
| 456 |
##
|
| 457 |
# Returns type of partition
|
| 458 |
def get_type(self):
|
| 459 |
return self._type
|
| 460 |
|
| 461 |
##
|
| 462 |
# Returns parent GLIStorageDevice object
|
| 463 |
def get_device(self):
|
| 464 |
return self._device
|
| 465 |
|
| 466 |
##
|
| 467 |
# Returns minor of partition
|
| 468 |
def get_minor(self):
|
| 469 |
return self._minor
|
| 470 |
|
| 471 |
##
|
| 472 |
# Returns whether the partition is resizeable
|
| 473 |
def is_resizeable(self):
|
| 474 |
return self._resizeable
|
| 475 |
|
| 476 |
##
|
| 477 |
# Sets partition flags
|
| 478 |
def set_flags(self, flags):
|
| 479 |
self._flags = flags
|
| 480 |
|
| 481 |
##
|
| 482 |
# Returns partition flags
|
| 483 |
def get_flags(self):
|
| 484 |
return self._flags
|
| 485 |
|
| 486 |
##
|
| 487 |
# Sets partition name
|
| 488 |
def set_name(self, name):
|
| 489 |
self._name = name
|
| 490 |
|
| 491 |
##
|
| 492 |
# Returns partition name
|
| 493 |
def get_name(self):
|
| 494 |
return self._name
|
| 495 |
|
| 496 |
##
|
| 497 |
# Returns minimum MB for resize
|
| 498 |
def get_min_mb_for_resize(self):
|
| 499 |
# if self.is_extended():
|
| 500 |
# min_size = self._start
|
| 501 |
# for part in self._device._partitions:
|
| 502 |
# if part < 5: continue
|
| 503 |
# if part.get_end > min_size: min_size = part.get_end()
|
| 504 |
# return min_size
|
| 505 |
# else:
|
| 506 |
if self._resizeable:
|
| 507 |
return self._min_mb_for_resize
|
| 508 |
else:
|
| 509 |
return -1
|
| 510 |
|
| 511 |
##
|
| 512 |
# Returns maximum MB for resize
|
| 513 |
def get_max_mb_for_resize(self):
|
| 514 |
if self._resizeable:
|
| 515 |
minor_pos = self._device.get_partition_position(self._minor)
|
| 516 |
try:
|
| 517 |
free_minor = self._device._partitions[minor_pos+1].get_minor()
|
| 518 |
except:
|
| 519 |
free_minor = 0
|
| 520 |
if not free_minor or not self._device.get_partition(free_minor).get_type() == "free": return self._mb
|
| 521 |
if self._device.get_partition(free_minor).is_logical():
|
| 522 |
if self.is_logical():
|
| 523 |
return self._mb + self._device.get_partition(free_minor).get_mb()
|
| 524 |
else:
|
| 525 |
return self._mb
|
| 526 |
else:
|
| 527 |
return self._mb + self._device.get_partition(free_minor).get_mb()
|
| 528 |
else:
|
| 529 |
return -1
|
| 530 |
|
| 531 |
##
|
| 532 |
# Resizes the partition
|
| 533 |
# @param mb New size in MB
|
| 534 |
def resize(self, mb):
|
| 535 |
minor_pos = self._device.get_partition_position(self._minor)
|
| 536 |
try:
|
| 537 |
free_minor = self._device._partitions[minor_pos+1].get_minor()
|
| 538 |
except:
|
| 539 |
free_minor = 0
|
| 540 |
if mb < self._mb:
|
| 541 |
# Shrinking
|
| 542 |
if not free_minor or not self._device.get_partition(free_minor).get_type() == "free":
|
| 543 |
if self._device._disklabel == "mac":
|
| 544 |
free_minor = self._minor + 1
|
| 545 |
elif self.is_logical():
|
| 546 |
free_minor = self._minor + FREE_MINOR_FRAC_LOG
|
| 547 |
else:
|
| 548 |
free_minor = self._minor + FREE_MINOR_FRAC_PRI
|
| 549 |
if self._device.get_partition(free_minor):
|
| 550 |
for i, part in enumerate(self._device._partitions):
|
| 551 |
if i <= minor_pos or free_minor > part.get_minor(): continue
|
| 552 |
part.set_minor(part.get_minor() + 1)
|
| 553 |
self._device._partitions.insert(minor_pos+1, Partition(self._device, free_minor, self._mb - mb, 0, 0, "free", format=False, existing=False))
|
| 554 |
else:
|
| 555 |
self._device.get_partition(free_minor).set_mb(self._device.get_partition(free_minor).get_mb() + (self._mb - mb))
|
| 556 |
self._mb = mb
|
| 557 |
else:
|
| 558 |
if mb == self._mb + self._device.get_partition(free_minor).get_mb():
|
| 559 |
# Using all available unallocated space
|
| 560 |
self._device._partitions.pop(self._device.get_partition_position(free_minor))
|
| 561 |
self._mb = mb
|
| 562 |
else:
|
| 563 |
# Growing
|
| 564 |
self._device.get_partition(free_minor).set_mb(self._device.get_partition(free_minor).get_mb() - (mb - self._mb))
|
| 565 |
self._mb = mb
|
| 566 |
self._resized = True
|
| 567 |
self._device.tidy_partitions()
|
| 568 |
|
| 569 |
##
|
| 570 |
# Returns a list of detected partitionable devices
|
| 571 |
def detect_devices():
|
| 572 |
devices = []
|
| 573 |
|
| 574 |
# Make sure sysfs exists
|
| 575 |
# TODO: rewrite for 2.4 support
|
| 576 |
if not os.path.exists("/sys/bus"):
|
| 577 |
raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "no sysfs found (you MUST use a kernel >2.6)")
|
| 578 |
# Make sure /proc/partitions exists
|
| 579 |
if not os.path.exists("/proc/partitions"):
|
| 580 |
raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "/proc/partitions does not exist! Please make sure procfs is in your kernel and mounted!")
|
| 581 |
|
| 582 |
# Load /proc/partitions into the variable 'partitions'
|
| 583 |
partitions = []
|
| 584 |
for line in open("/proc/partitions"):
|
| 585 |
tmpparts = line.split()
|
| 586 |
if len(tmpparts) < 4 or not tmpparts[0].isdigit() or not tmpparts[1].isdigit():
|
| 587 |
continue
|
| 588 |
|
| 589 |
# Get the major, minor and device name
|
| 590 |
major = int(tmpparts[0])
|
| 591 |
minor = int(tmpparts[1])
|
| 592 |
device = "/dev/" + tmpparts[3]
|
| 593 |
|
| 594 |
# If there is no /dev/'device_name', then scan
|
| 595 |
# all the devices in /dev to try and find a
|
| 596 |
# devices with the same major and minor
|
| 597 |
if not os.path.exists(device):
|
| 598 |
device = None
|
| 599 |
for path, dirs, files in os.walk("/dev"):
|
| 600 |
for d_file in files:
|
| 601 |
full_file = os.path.join(path, d_file)
|
| 602 |
if not os.path.exists(full_file):
|
| 603 |
continue
|
| 604 |
statres = os.stat(full_file)
|
| 605 |
fmaj = os.major(statres.st_rdev)
|
| 606 |
fmin = os.minor(statres.st_rdev)
|
| 607 |
if fmaj == major and fmin == minor:
|
| 608 |
device = full_file
|
| 609 |
break
|
| 610 |
if not device:
|
| 611 |
continue
|
| 612 |
|
| 613 |
partitions.append(( major, minor, device ))
|
| 614 |
|
| 615 |
# Scan sysfs for the devices of type 'x'
|
| 616 |
# 'x' being a member of the list below:
|
| 617 |
# Compaq cards.../sys/block/{cciss,ida}!cXdX/dev
|
| 618 |
for dev_glob in ("/sys/bus/ide/devices/*/block*/dev", "/sys/bus/scsi/devices/*/block*/dev", "/sys/block/cciss*/dev", "/sys/block/ida*/dev"):
|
| 619 |
sysfs_devices = glob(dev_glob)
|
| 620 |
if not sysfs_devices: continue
|
| 621 |
for sysfs_device in sysfs_devices:
|
| 622 |
# Get the major and minor info
|
| 623 |
try:
|
| 624 |
major, minor = open(sysfs_device).read().split(":")
|
| 625 |
major = int(major)
|
| 626 |
minor = int(minor)
|
| 627 |
except:
|
| 628 |
raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "invalid major/minor in " + sysfs_device)
|
| 629 |
|
| 630 |
# Find a device listed in /proc/partitions
|
| 631 |
# that has the same minor and major as our
|
| 632 |
# current block device.
|
| 633 |
for record in partitions:
|
| 634 |
if major == record[0] and minor == record[1]:
|
| 635 |
devices.append(record[2])
|
| 636 |
|
| 637 |
# For testing the partitioning code
|
| 638 |
if GLIUtility.is_file("/tmp/disk.img"):
|
| 639 |
devices.append("/tmp/disk.img")
|
| 640 |
|
| 641 |
# We have assembled the list of devices, so return it
|
| 642 |
return devices
|
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