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#!/usr/bin/python 

# 

# Copyright (C) Citrix Systems Inc. 

# 

# This program is free software; you can redistribute it and/or modify  

# it under the terms of the GNU Lesser General Public License as published  

# by the Free Software Foundation; version 2.1 only. 

# 

# 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 Lesser General Public License for more details. 

# 

# You should have received a copy of the GNU Lesser General Public License 

# along with this program; if not, write to the Free Software Foundation, Inc., 

# 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA 

# 

# A plugin for synchronizing slaves when something changes on the Master 

 

import sys 

sys.path.append("/opt/xensource/sm/") 

import util 

import lock 

from lvmcache import LVMCache 

import scsiutil 

 

def multi(session, args): 

    """Perform several actions in one call (to save on round trips)""" 

    util.SMlog("on-slave.multi: %s" % args) 

    vgName = args["vgName"] 

    lvmCache = LVMCache(vgName) 

    i = 1 

    while True: 

        action = args.get("action%d" % i) 

        if not action: 

            break 

        util.SMlog("on-slave.action %d: %s" % (i, action)) 

        if action == "activate": 

            try: 

                lvmCache.activate(args["ns%d" % i], args["uuid%d" % i], 

                                  args["lvName%d" % i], False) 

            except util.CommandException: 

                util.SMlog("on-slave.activate failed") 

                raise 

        elif action == "deactivate": 

            try: 

                lvmCache.deactivate(args["ns%d" % i], args["uuid%d" % i], 

                        args["lvName%d" % i], False) 

            except util.SMException: 

                util.SMlog("on-slave.deactivate failed") 

                raise 

        elif action == "deactivateNoRefcount": 

            try: 

                lvmCache.deactivateNoRefcount(args["lvName%d" % i]) 

            except util.SMException: 

                util.SMlog("on-slave.deactivateNoRefcount failed") 

                raise 

        elif action == "refresh": 

            try: 

                lvmCache.activateNoRefcount(args["lvName%d" % i], True) 

            except util.CommandException: 

                util.SMlog("on-slave.refresh failed") 

                raise 

        elif action == "cleanupLockAndRefcount": 

            from refcounter import RefCounter 

            lock.Lock.cleanup(args["uuid%d" % i], args["ns%d" % i]) 

            RefCounter.reset(args["uuid%d" % i], args["ns%d" % i]) 

        else: 

            raise util.SMException("unrecognized action: %s" % action) 

        i += 1 

    return str(True) 

 

def _is_open(session, args): 

    """Check if VDI <args["vdiUuid"]> is open by a tapdisk on this host""" 

    import SRCommand 

    import SR 

    import CephFSSR 

    import EXTSR 

    import GlusterFSSR 

    import LVHDSR 

    import MooseFSSR 

    import NFSSR 

    import XFSSR 

    import ZFSSR 

    import blktap2 

 

    util.SMlog("on-slave.is_open: %s" % args) 

    vdiUuid = args["vdiUuid"] 

    srRef = args["srRef"] 

    srRec = session.xenapi.SR.get_record(srRef) 

    srType = srRec["type"] 

 

    # FIXME: ugly hacks to create a VDI object without a real SRCommand to  

    # avoid having to refactor the core files 

    if srType.startswith("lvm"): 

        srType = "lvhd" 

    cmd = SRCommand.SRCommand(None) 

    cmd.driver_info = {"capabilities": None} 

    cmd.dconf = { 

        "server": None, 

        "device": "/HACK", 

        # Hack for custom XCP-ng drivers. 

        "masterhost": None,  # MooseFS 

        "rootpath": None,    # MooseFS 

        "serverpath": None,  # CephFS 

        "location": "/HACK"  # ZFS 

    } 

    cmd.params = {"command": None} 

 

    driver = SR.driver(srType) 

    sr = driver(cmd, srRec["uuid"]) 

    vdi = sr.vdi(vdiUuid) 

    tapdisk = blktap2.Tapdisk.find_by_path(vdi.path) 

    util.SMlog("Tapdisk for %s: %s" % (vdi.path, tapdisk)) 

    if tapdisk: 

        return "True" 

    return "False" 

 

def is_open(session, args): 

    try: 

        return _is_open(session, args) 

    except: 

        util.logException("is_open") 

        raise 

 

 

def refresh_lun_size_by_SCSIid(session, args): 

    """Refresh the size of LUNs backing the SCSIid on the local node.""" 

    util.SMlog("on-slave.refresh_lun_size_by_SCSIid(,%s)" % args) 

    if scsiutil.refresh_lun_size_by_SCSIid(args['SCSIid']): 

        util.SMlog("on-slave.refresh_lun_size_by_SCSIid with %s succeeded" 

                   % args) 

        return "True" 

    else: 

        util.SMlog("on-slave.refresh_lun_size_by_SCSIid with %s failed" % args) 

        return "False" 

 

 

140if __name__ == "__main__": 

    import XenAPIPlugin 

    XenAPIPlugin.dispatch({ 

        "multi": multi, 

        "is_open": is_open, 

        "refresh_lun_size_by_SCSIid": refresh_lun_size_by_SCSIid})