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#
# partitions.py: partition object containing partitioning info
#
# Matt Wilson <msw@redhat.com>
# Jeremy Katz <katzj@redhat.com>
# Mike Fulbright <msf@redhat.com>
# Harald Hoyer <harald@redhat.de>
#
# Copyright 2002 Red Hat, Inc.
#
# This software may be freely redistributed under the terms of the GNU
# library public license.
#
# You should have received a copy of the GNU Library Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
"""Overarching partition object."""

import parted
import iutil
import isys
import string
import os, sys

from constants import *

import fsset
import raid
import lvm
import partedUtils
import partRequests

from rhpl.translate import _
from rhpl.log import log

class Partitions:
    """Defines all of the partition requests and delete requests."""
    def __init__ (self, diskset = None):
        """Initializes a Partitions object.

        Can pass in the diskset if it already exists.
        """
        self.requests = []
        """A list of RequestSpec objects for all partitions."""

        self.deletes = []
        """A list of DeleteSpec objects for partitions to be deleted."""

        self.autoPartitionRequests = []
        """A list of RequestSpec objects for autopartitioning.
        These are setup by the installclass and folded into self.requests
        by auto partitioning."""

        self.autoClearPartType = CLEARPART_TYPE_NONE
        """What type of partitions should be cleared?"""

        self.autoClearPartDrives = None
        """Drives to clear partitions on (note that None is equiv to all)."""

        self.nextUniqueID = 1
        """Internal counter.  Don't touch unless you're smarter than me."""

        self.reinitializeDisks = 0
        """Should the disk label be reset on all disks?"""

        self.zeroMbr = 0
        """Should the mbr be zero'd?"""

        # partition method to be used.  not to be touched externally
        self.useAutopartitioning = 1
        self.useFdisk = 0

        # autopartitioning info becomes kickstart partition requests
        # and its useful to be able to differentiate between the two
        self.isKickstart = 0

        if diskset:
            self.setFromDisk(diskset)


    def setFromDisk(self, diskset):
        """Clear the delete list and set self.requests to reflect disk."""
        self.deletes = []
        self.requests = []
        diskset.refreshDevices()
        labels = diskset.getLabels()
        drives = diskset.disks.keys()
        drives.sort()
        for drive in drives:
            disk = diskset.disks[drive]
            part = disk.next_partition()
            while part:
                if part.type & parted.PARTITION_METADATA:
                    part = disk.next_partition(part)
                    continue

                format = None
                if part.type & parted.PARTITION_FREESPACE:
                    ptype = None
                elif part.type & parted.PARTITION_EXTENDED:
                    ptype = None
                elif part.get_flag(parted.PARTITION_RAID) == 1:
                    ptype = fsset.fileSystemTypeGet("software RAID")
                elif part.get_flag(parted.PARTITION_LVM) == 1:
                    ptype = fsset.fileSystemTypeGet("physical volume (LVM)")
                else:
                    ptype = partedUtils.get_partition_file_system_type(part)
                    if part.fs_type and part.fs_type.name == "linux-swap":
                        # XXX this is a hack
                        format = 1

                    # FIXME: we don't handle ptype being None very well, so
                    # just say it's foreign.  Should probably fix None handling
                    # instead some day.
                    if ptype is None:
                        ptype = fsset.fileSystemTypeGet("foreign")
                    
                start = part.geom.start
                end = part.geom.end
                size = partedUtils.getPartSizeMB(part)
                drive = partedUtils.get_partition_drive(part)

                spec = partRequests.PreexistingPartitionSpec(ptype,
                                                             size = size,
                                                             start = start,
                                                             end = end,
                                                             drive = drive,
                                                             format = format)
                spec.device = fsset.PartedPartitionDevice(part).getDevice()

                # set label if makes sense
                if ptype and ptype.isMountable() and \
                   (ptype.getName() == "ext2" or ptype.getName() == "ext3"):
                    if spec.device in labels.keys():
                        if labels[spec.device] and len(labels[spec.device])>0:
                            spec.fslabel = labels[spec.device]

                self.addRequest(spec)
                part = disk.next_partition(part)

        # now we need to read in all pre-existing RAID stuff
        diskset.startAllRaid()
        mdList = diskset.mdList
        for raidDev in mdList:
            (theDev, devices, level, numActive) = raidDev

            level = "RAID%s" %(level,)
            
            # is minor always mdN ?
            minor = int(theDev[2:])
            raidvols = []
            for dev in devices:
                req = self.getRequestByDeviceName(dev)
                if not req:
                    log("RAID device %s using non-existent partition %s"
                        %(theDev, dev))
                    continue
                raidvols.append(req.uniqueID)
                

            fs = partedUtils.sniffFilesystemType(theDev)
            if fs is None:
                fsystem = fsset.fileSystemTypeGet("foreign")
            else:
                fsystem = fsset.fileSystemTypeGet(fs)

            if fs == "swap":
                mnt = None
                # more forced swap format hacking
                format = 1
            else:
                mnt = None
                format = 0
                    
            spares = len(devices) - numActive
            spec = partRequests.RaidRequestSpec(fsystem, format = format,
                                                raidlevel = level,
                                                raidmembers = raidvols,
                                                raidminor = minor,
                                                raidspares = spares,
                                                mountpoint = mnt,
                                                preexist = 1)
            spec.size = spec.getActualSize(self, diskset)
            self.addRequest(spec)

        # now to read in pre-existing LVM stuff
        lvm.vgscan()
        lvm.vgactivate()

        vgs = []
        if os.path.isdir("/proc/lvm/VGs"):
            vgs = os.listdir("/proc/lvm/VGs")

        for vg in vgs:
            # first find the PE size
            f = open("/proc/lvm/VGs/%s/group" %(vg,), "r")
            lines = f.readlines()
            f.close()
            pesize = 0
            preexist_size = None
            for line in lines:
                fields = line.split(':',1)
                if len(fields) < 2:
                    continue
                if fields[0].strip() == "PE size":
                    pesize = fields[1].strip()
                    try:
                        pesize = int(pesize)
                    except:
                        log("PE size for %s not a valid integer, defaulting to 4096" %(vg,))
                        pesize = 4096
                elif fields[0].strip() == "size":
                    preexist_size = fields[1].strip()
                    try:
                        preexist_size = int(preexist_size) / 1024.0
                    except:
                        log("preexisting size for %s not a valid integer, ignoring" %(vg,))
                        preexist_size = None

            if not pesize:
                log("Unable to find PE size for %s, defaulting to 4096" %(vg,))
                pesize = 4096

            # Now find the physical volumes associated with this VG
            if not os.path.isdir("/proc/lvm/VGs/%s/PVs" % (vg,)):
                log("Unable to find PVs for %s" % (vg,))
                continue
            pvs = os.listdir("/proc/lvm/VGs/%s/PVs/" % (vg,))
            pvids = []
            for pv in pvs:
                # XXX I hate the lvm code.  it puts cciss_c0d0p2 for
                # things like cciss/c0d0p2 so we need to substitute. ick.
                pv = pv.replace("_", "/")
                req = self.getRequestByDeviceName(pv)
                if not req:
                    log("Volume group %s using non-existent partition %s"
                        %(vg, pv))
                    continue
                pvids.append(req.uniqueID)
            spec = partRequests.VolumeGroupRequestSpec(format = 0,
                                                       vgname = vg,
                                                       physvols = pvids,
                                                       pesize = pesize,
                                                       preexist = 1,
                                                       preexist_size = preexist_size)
            vgid = self.addRequest(spec)

            # now we need to find out about the logical volumes
            if not os.path.isdir("/proc/lvm/VGs/%s/LVs" %(vg,)):
                log("Unable to find LVs for %s" % (vg,))
                continue
            lvs = os.listdir("/proc/lvm/VGs/%s/LVs" % (vg,))
            for lv in lvs:
                f = open("/proc/lvm/VGs/%s/LVs/%s" % (vg,lv), "r")
                lines = f.readlines()
                f.close()
                lvsize = None
                for line in lines:
                    fields = line.split(':',1)
                    if len(fields) < 2:
                        continue
                    if fields[0].strip() == "size":
                        lvsize = fields[1].strip()
                if lvsize is None:
                    log("Unable to find LV size for %s/%s" % (vg, lv))
                    continue
                # size is listed as number of blocks, we want size in megs
                lvsize = int(lvsize) / 2048.0

                theDev = "/dev/%s/%s" %(vg, lv)
                fs = partedUtils.sniffFilesystemType(theDev)
                if fs is None:
                    fsystem = fsset.fileSystemTypeGet("foreign")
                else:
                    fsystem = fsset.fileSystemTypeGet(fs)

                if fs == "swap":
                    mnt = None
                    format = 1
                else:
                    mnt = None
                    format = 0

                spec = partRequests.LogicalVolumeRequestSpec(fsystem,
                                                             format = format,
                                                             size = lvsize,
                                                             volgroup = vgid,
                                                             lvname = lv,
                                                             mountpoint = mnt,
                                                             preexist = 1)
                self.addRequest(spec)
        lvm.vgdeactivate()

        diskset.stopAllRaid()
            
        

    def addRequest (self, request):
        """Add a new request to the list."""
        if not request.uniqueID:
            request.uniqueID = self.nextUniqueID
            self.nextUniqueID = self.nextUniqueID + 1
        self.requests.append(request)
        self.requests.sort()

        return request.uniqueID

    def addDelete (self, delete):
        """Add a new DeleteSpec to the list."""
        self.deletes.append(delete)
        self.deletes.sort()

    def removeRequest (self, request):
        """Remove a request from the list."""
        self.requests.remove(request)

    def getRequestByMountPoint(self, mount):
        """Find and return the request with the given mountpoint."""
        for request in self.requests:
            if request.mountpoint == mount:
                return request
	    
	for request in self.requests:
	    if request.type == REQUEST_LV and request.mountpoint == mount:
		return request
        return None

    def getRequestByDeviceName(self, device):
        """Find and return the request with the given device name."""
	if device is None:
	    return None
	
        for request in self.requests:
	    if request.type == REQUEST_RAID and request.raidminor is not None:
		tmp = "md%d" % (request.raidminor,)
		if tmp == device:
		    return request
	    elif request.device == device:
                return request
        return None


    def getRequestsByDevice(self, diskset, device):
        """Find and return the requests on a given device (like 'hda')."""
        if device is None:
            return None

        drives = diskset.disks.keys()
        if device not in drives:
            return None

        rc = []
        disk = diskset.disks[device]
        part = disk.next_partition()
        while part:
            dev = partedUtils.get_partition_name(part)
            request = self.getRequestByDeviceName(dev)

            if request:
                rc.append(request)
            part = disk.next_partition(part)

        if len(rc) > 0:
            return rc
        else:
            return None

    def getRequestByVolumeGroupName(self, volname):
        """Find and return the request with the given volume group name."""
	if volname is None:
	    return None
	
	for request in self.requests:
	    if (request.type == REQUEST_VG and
                request.volumeGroupName == volname):
		return request
        return None

    def getRequestByLogicalVolumeName(self, lvname):
        """Find and return the request with the given logical volume name."""
	if lvname is None:
	    return None
	for request in self.requests:
	    if (request.type == REQUEST_LV and
                request.logicalVolumeName == lvname):
		return request
        return None

    def getRequestByID(self, id):
        """Find and return the request with the given unique ID.

        Note that if id is a string, it will be converted to an int for you.
        """
	if type(id) == type("a string"):
	    id = int(id)
        for request in self.requests:
            if request.uniqueID == id:
                return request
        return None

    def getRaidRequests(self):
        """Find and return a list of all of the RAID requests."""
        retval = []
        for request in self.requests:
            if request.type == REQUEST_RAID:
                retval.append(request)

        return retval

    def getRaidDevices(self):
        """Find and return a list of all of the requests for use in RAID."""
        raidRequests = []
        for request in self.requests:
            if isinstance(request, partRequests.RaidRequestSpec):
                raidRequests.append(request)
                
        return raidRequests

    def getAvailableRaidMinors(self):
        """Find and return a list of all of the unused minors for use in RAID."""
        raidMinors = range(0,32)
        for request in self.requests:
            if isinstance(request, partRequests.RaidRequestSpec):
                raidMinors.remove(request.raidminor)
                
        return raidMinors
	

    def getAvailRaidPartitions(self, request, diskset):
        """Return a list of tuples of RAID partitions which can be used.

        Return value is (part, size, used) where used is 0 if not,
        1 if so, 2 if used for *this* request.
        """
        rc = []
        drives = diskset.disks.keys()
        raiddevs = self.getRaidDevices()
        drives.sort()
        for drive in drives:
            disk = diskset.disks[drive]
            for part in partedUtils.get_raid_partitions(disk):
                partname = partedUtils.get_partition_name(part)
                used = 0
                for raid in raiddevs:
                    if raid.raidmembers:
                        for raidmem in raid.raidmembers:
                            tmpreq = self.getRequestByID(raidmem)
                            if (partname == tmpreq.device):
                                if raid.uniqueID == request.uniqueID:
                                    used = 2
                                else:
                                    used = 1
                                break
                    if used:
                        break
                size = partedUtils.getPartSizeMB(part)

                if not used:
                    rc.append((partname, size, 0))
                elif used == 2:
                    rc.append((partname, size, 1))
		    
        return rc

    def getRaidMemberParent(self, request):
        """Return RAID device request containing this request."""
        raiddev = self.getRaidRequests()
        if not raiddev or not request.device:
            return None
        for dev in raiddev:
            if not dev.raidmembers:
                continue
            for member in dev.raidmembers:
                if request.device == self.getRequestByID(member).device:
                    return dev
        return None

    def isRaidMember(self, request):
        """Return whether or not the request is being used in a RAID device."""
	if self.getRaidMemberParent(request) is not None:
	    return 1
	else:
	    return 0

    def getLVMLVForVGID(self, vgid):        
        """Find and return a list of all the LVs associated with a VG id."""
        retval = []
        for request in self.requests:
	    if request.type == REQUEST_LV:
		if request.volumeGroup == vgid:
                    retval.append(request)
        return retval

    def getLVMLVForVG(self, vgrequest):
        """Find and return a list of all of the LVs in the VG."""
        vgid = vgrequest.uniqueID
        return self.getLVMLVForVGID(vgid)
		
    def getLVMRequests(self):
        """Return a dictionary of all of the LVM bits.

        The dictionary returned is of the form vgname: [ lvrequests ]
        """
        retval = {}
        for request in self.requests:
            if request.type == REQUEST_VG:
                retval[request.volumeGroupName] = self.getLVMLVForVG(request)
	    
        return retval

    def getLVMVGRequests(self):
        """Find and return a list of all of the volume groups."""
        retval = []
        for request in self.requests:
            if request.type == REQUEST_VG:
                retval.append(request)

        return retval

    def getLVMLVRequests(self):
        """Find and return a list of all of the logical volumes."""
        retval = []
        for request in self.requests:
            if request.type == REQUEST_LV:
                retval.append(request)

        return retval

    def getAvailLVMPartitions(self, request, diskset):
        """Return a list of tuples of PV partitions which can be used.

        Return value is (part, size, used) where used is 0 if not,
        1 if so, 2 if used for *this* request.
        """
        rc = []
        drives = diskset.disks.keys()
        drives.sort()
        volgroups = self.getLVMVGRequests()
        for drive in drives:
            disk = diskset.disks[drive]
            for part in partedUtils.get_lvm_partitions(disk):
                partname = partedUtils.get_partition_name(part)
                partrequest = self.getRequestByDeviceName(partname)
                used = 0
                for volgroup in volgroups:
                    if volgroup.physicalVolumes:
                        if partrequest.uniqueID in volgroup.physicalVolumes:
                            if (request and request.uniqueID and
                                volgroup.uniqueID == request.uniqueID):
                                used = 2
                            else:
                                used = 1

                    if used:
                        break
                size = partedUtils.getPartSizeMB(part)                    

                if used == 0:
                    rc.append((partrequest.uniqueID, size, 0))
                elif used == 2:
                    rc.append((partrequest.uniqueID, size, 1))

	# now find available RAID devices
	raiddev = self.getRaidRequests()
	if raiddev:
	    raidcounter = 0
	    for dev in raiddev:
                used = 0

		if dev.fstype is None:
		    continue
		if dev.fstype.getName() != "physical volume (LVM)":
		    continue
		
                for volgroup in volgroups:
                    if volgroup.physicalVolumes:
                        if dev.uniqueID in volgroup.physicalVolumes:
                            if (request and request.uniqueID and
                                volgroup.uniqueID == request.uniqueID):
                                used = 2
                            else:
                                used = 1

                    if used:
                        break
		    
                size = dev.getActualSize(self, diskset)

                if used == 0:
                    rc.append((dev.uniqueID, size, 0))
                elif used == 2:
                    rc.append((dev.uniqueID, size, 1))

		raidcounter = raidcounter + 1
        return rc

    def getLVMVolumeGroupMemberParent(self, request):
        """Return parent volume group of a physical volume"""
	volgroups = self.getLVMVGRequests()
	if not volgroups:
	    return None

	for volgroup in volgroups:
	    if volgroup.physicalVolumes:
		if request.uniqueID in volgroup.physicalVolumes:
		    return volgroup

	return None

    def isLVMVolumeGroupMember(self, request):
        """Return whether or not the request is being used in an LVM device."""
	if self.getLVMVolumeGroupMemberParent(request) is None:
	    return 0
	else:
	    return 1
    
    def isVolumeGroupNameInUse(self, vgname):
        """Return whether or not the requested volume group name is in use."""
        if not vgname:
            return None

        lvmrequests = self.getLVMRequests()
        if not lvmrequests:
            return None

        if vgname in lvmrequests.keys():
            return 1
        return 0

    def getBootableRequest(self):
        """Return the name of the current 'boot' mount point."""
        bootreq = None

        if iutil.getArch() == "ia64":
            bootreq = self.getRequestByMountPoint("/boot/efi")
            return bootreq
        elif (iutil.getPPCMachine() == "pSeries" or
              iutil.getPPCMachine() == "iSeries"):
            for req in self.requests:
                if req.fstype == fsset.fileSystemTypeGet("PPC PReP Boot"):
                    return req
            return None
        
        if not bootreq:
            bootreq = self.getRequestByMountPoint("/boot")
        if not bootreq:
            bootreq = self.getRequestByMountPoint("/")
            
        return bootreq

    def getBootableMountpoints(self):
        """Return a list of bootable valid mountpoints for this arch."""
        # FIXME: should be somewhere else, preferably some sort of arch object

        if iutil.getArch() == "ia64":
            return [ "/boot/efi" ]
        else:
            return [ "/boot", "/" ]

    def isBootable(self, request):
        """Returns if the request should be considered a 'bootable' request.

        This basically means that it should be sorted to the beginning of
        the drive to avoid cylinder problems in most cases.
        """
        bootreq = self.getBootableRequest()
        if not bootreq:
            return 0
        
        if bootreq == request:
            return 1

        if bootreq.type == REQUEST_RAID and \
           request.uniqueID in bootreq.raidmembers:
            return 1

        return 0

    def sortRequests(self):
        """Resort the requests into allocation order."""
        n = 0
        while n < len(self.requests):
	    # Ignore LVM Volume Group and Logical Volume requests,
	    # since these are not related to allocating disk partitions
	    if (self.requests[n].type == REQUEST_VG or self.requests[n].type == REQUEST_LV):
		n = n + 1
		continue
	    
            for request in self.requests:
		# Ignore LVM Volume Group and Logical Volume requests,
		# since these are not related to allocating disk partitions
		if (request.type == REQUEST_VG or request.type == REQUEST_LV):
		    continue
                # for raid requests, the only thing that matters for sorting
                # is the raid device since ordering by size is mostly
                # irrelevant.  this also keeps things more consistent
                elif (request.type == REQUEST_RAID or
                    self.requests[n].type == REQUEST_RAID):
                    if (request.type == self.requests[n].type and
                        (self.requests[n].raidminor != None) and
                        ((request.raidminor is None) or
                         request.raidminor > self.requests[n].raidminor)):
                        tmp = self.requests[n]
                        index = self.requests.index(request)
                        self.requests[n] = request
                        self.requests[index] = tmp
                # for sized requests, we want the larger ones first
                elif (request.size and self.requests[n].size and
                    (request.size < self.requests[n].size)):
                    tmp = self.requests[n]
                    index = self.requests.index(request)
                    self.requests[n] = request
                    self.requests[index] = tmp
                # for cylinder-based, sort by order on the drive
                elif (request.start and self.requests[n].start and
                      (request.drive == self.requests[n].drive) and
                      (request.type == self.requests[n].type) and


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