mirror of
https://github.com/xcp-ng/xenadmin.git
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415 lines
14 KiB
C#
415 lines
14 KiB
C#
/* Copyright (c) Citrix Systems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms,
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* with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* * Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using XenAdmin.Core;
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using XenAPI;
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namespace XenAdmin.Controls
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{
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/// <summary>
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/// Decide which of the SRPickerItem to choose - depending on the usage required
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/// </summary>
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public class SrPickerItemFactory
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{
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public SrPickerItem PickerItem(SR sr, SrPicker.SRPickerType usage, Host aff, long diskSize, VDI[] vdis)
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{
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if (SrPicker.SRPickerType.Migrate == usage)
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return new SrPickerMigrateItem(sr, aff, diskSize, vdis);
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if (SrPicker.SRPickerType.MoveOrCopy == usage)
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return new SrPickerMoveCopyItem(sr, aff, diskSize, vdis);
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if (SrPicker.SRPickerType.InstallFromTemplate == usage)
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return new SrPickerInstallFromTemplateItem(sr, aff, diskSize, vdis);
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if (SrPicker.SRPickerType.VM == usage)
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return new SrPickerVmItem(sr, aff, diskSize, vdis);
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if (SrPicker.SRPickerType.LunPerVDI == usage)
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return new SrPickerLunPerVDIItem(sr, aff, diskSize, vdis);
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throw new ArgumentException("There is no SRPickerItem for the type: " + usage);
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}
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}
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public class SrPickerLunPerVDIItem : SrPickerVmItem
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{
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public SrPickerLunPerVDIItem(SR sr, Host aff, long diskSize, VDI[] vdis)
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: base(sr, aff, diskSize, vdis)
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{
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}
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protected override bool CanBeEnabled
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{
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get
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{
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if(TheSR.HBALunPerVDI)
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return !TheSR.IsBroken(false) && TheSR.CanBeSeenFrom(Affinity);
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return base.CanBeEnabled;
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}
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}
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protected override bool UnsupportedSR
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{
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get { return false; }
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}
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}
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/// <summary>
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/// Stategy pattern for the SRPickerItem for migrate scenarios
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/// </summary>
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public class SrPickerMigrateItem : SrPickerItem
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{
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public SrPickerMigrateItem(SR sr, Host aff, long diskSize, VDI[] vdis) : base(sr, aff, diskSize, vdis)
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{
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}
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private bool CanMigrate(VDI vdi)
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{
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if (TheSR == null || vdi == null)
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return false;
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bool toLocal = TheSR.IsLocalSR;
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if (toLocal && !HomeHostCanSeeTargetSr(vdi))
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return false;
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bool fromLocal = vdi.Connection.Resolve(vdi.SR).IsLocalSR;
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if (fromLocal && toLocal)
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return false;
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return true;
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}
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/// <summary>
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/// If the VM has a home host, we can move VDIs to a local SR only
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/// if the latter belongs to the VM's home host
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/// </summary>
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private bool HomeHostCanSeeTargetSr(VDI vdi)
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{
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var vms = vdi.GetVMs();
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var homeHosts = (from VM vm in vms
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let host = vm.Home()
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where host != null
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select host).ToList();
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return homeHosts.Count == 0 || homeHosts.Any(TheSR.CanBeSeenFrom);
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}
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protected override string CannotBeShownReason
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{
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get
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{
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if (ExistingVDILocation())
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return Messages.CURRENT_LOCATION;
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if (LocalToLocalMove())
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return Messages.LOCAL_TO_LOCAL_MOVE;
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if (TheSR.IsLocalSR && existingVDIs != null && existingVDIs.Any(v => !HomeHostCanSeeTargetSr(v)))
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return Messages.SRPICKER_ERROR_LOCAL_SR_MUST_BE_RESIDENT_HOSTS;
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if (!TheSR.CanBeSeenFrom(Affinity))
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return TheSR.Connection != null
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? string.Format(Messages.SR_CANNOT_BE_SEEN, Affinity == null ? Helpers.GetName(TheSR.Connection) : Helpers.GetName(Affinity))
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: Messages.SR_DETACHED;
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return base.CannotBeShownReason;
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}
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}
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private bool LocalToLocalMove()
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{
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return TheSR.IsLocalSR && existingVDIs != null && existingVDIs.Length > 0 && existingVDIs.All(vdi => vdi.Connection.Resolve(vdi.SR).IsLocalSR);
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}
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protected override bool CanBeEnabled
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{
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get
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{
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return existingVDIs != null && existingVDIs.Length > 0 && existingVDIs.All(CanMigrate)
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&& TheSR.SupportsVdiCreate() && !ExistingVDILocation() && !TheSR.IsDetached && TargetSRHasEnoughFreeSpace;
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}
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}
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}
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/// <summary>
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/// Stategy pattern for the SRPickerItem for copy and move scenarios
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/// </summary>
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public class SrPickerMoveCopyItem : SrPickerItem
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{
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public SrPickerMoveCopyItem(SR sr, Host aff, long diskSize, VDI[] vdis) : base(sr, aff, diskSize, vdis)
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{
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}
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protected override bool CanBeEnabled
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{
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get
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{
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return !TheSR.IsDetached && TheSR.SupportsVdiCreate() && !ExistingVDILocation() &&
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TargetSRHasEnoughFreeSpace;
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}
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}
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protected override string CannotBeShownReason
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{
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get
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{
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if (TheSR.IsDetached)
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return Messages.SR_DETACHED;
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if (ExistingVDILocation())
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return Messages.CURRENT_LOCATION;
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return base.CannotBeShownReason;
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}
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}
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}
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/// <summary>
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/// Stategy pattern for the SRPickerItem for installing from a template scenarios
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/// </summary>
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public class SrPickerInstallFromTemplateItem : SrPickerItem
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{
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public SrPickerInstallFromTemplateItem(SR sr, Host aff, long diskSize, VDI[] vdis) : base(sr, aff, diskSize, vdis)
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{
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}
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protected override bool CanBeEnabled
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{
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get { return TheSR.SupportsVdiCreate() && !TheSR.IsDetached && TargetSRHasEnoughFreeSpace; }
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}
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protected override string CannotBeShownReason
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{
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get
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{
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if (TheSR.IsDetached)
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return Messages.SR_DETACHED;
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return base.CannotBeShownReason;
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}
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}
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}
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/// <summary>
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/// Stategy pattern for the SRPickerItem for VM scenarios
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/// </summary>
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public class SrPickerVmItem : SrPickerItem
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{
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public SrPickerVmItem(SR sr, Host aff, long diskSize, VDI[] vdis) : base(sr, aff, diskSize, vdis)
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{
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}
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protected override bool CanBeEnabled
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{
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get { return TheSR.CanBeSeenFrom(Affinity) && TheSR.CanCreateVmOn() && TargetSRHasEnoughFreeSpace; }
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}
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protected override string CannotBeShownReason
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{
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get
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{
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if (Affinity == null && !TheSR.shared)
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return Messages.SR_IS_LOCAL;
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if (!TheSR.CanBeSeenFrom(Affinity))
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return TheSR.Connection != null
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? string.Format(Messages.SR_CANNOT_BE_SEEN, Affinity == null ? Helpers.GetName(TheSR.Connection) : Helpers.GetName(Affinity))
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: Messages.SR_DETACHED;
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return base.CannotBeShownReason;
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}
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}
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}
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/// <summary>
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/// Base class for the SRPickerItem stategies
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/// </summary>
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public abstract class SrPickerItem : CustomTreeNode, IComparable<SrPickerItem>
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{
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public SR TheSR { get; private set; }
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public bool Show { get; private set; }
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protected Host Affinity { get; private set; }
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protected long DiskSize { get; private set; }
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protected VDI[] existingVDIs { get; private set; }
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private SrPickerItem()
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{
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Show = true;
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}
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protected SrPickerItem(SR sr, Host aff, long diskSize, VDI[] vdis) : this()
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{
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existingVDIs = vdis;
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TheSR = sr;
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Affinity = aff;
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DiskSize = diskSize;
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Update();
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}
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private bool ShowHiddenVDIs
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{
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get
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{
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return TheSR.ShowInVDISRList(Properties.Settings.Default.ShowHiddenVMs);
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}
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}
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protected bool TargetSRHasEnoughFreeSpace
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{
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get
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{
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return TheSR.FreeSpace >= DiskSize;
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}
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}
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protected virtual bool UnsupportedSR
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{
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get { return TheSR.HBALunPerVDI; }
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}
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protected abstract bool CanBeEnabled { get; }
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protected virtual void SetImage()
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{
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Image = Images.GetImage16For(TheSR);
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}
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public void UpdateDiskSize(long diskSize)
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{
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DiskSize = diskSize;
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Update();
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}
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public void Update()
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{
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Text = TheSR.Name;
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SetImage();
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if(UnsupportedSR)
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{
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DoNotShowSR();
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}
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else if (ShowHiddenVDIs && CanBeEnabled && !ExistingVDILocation())
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{
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ShowSREnabled();
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}
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else if (TheSR.PBDs.Count > 0 && TheSR.SupportsVdiCreate())
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{
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ShowSRDisabled();
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}
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else
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{
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DoNotShowSR();
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}
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}
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private void DoNotShowSR()
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{
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Show = false;
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}
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private void ShowSRDisabled()
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{
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Description = CannotBeShownReason;
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CalculateDisabledSortReason();
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Enabled = false;
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Show = true;
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}
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private void ShowSREnabled()
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{
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Enabled = true;
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Description = string.Format(Messages.SRPICKER_DISK_FREE, Util.DiskSizeString(TheSR.FreeSpace, 2),
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Util.DiskSizeString(TheSR.physical_size, 2));
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CalculateEnabledSortReason();
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Show = true;
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}
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protected bool ExistingVDILocation()
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{
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return existingVDIs != null && existingVDIs.Length > 0 && existingVDIs.All(vdi => vdi.SR.opaque_ref == TheSR.opaque_ref);
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}
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protected virtual string CannotBeShownReason
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{
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get
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{
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if (TheSR.IsBroken(false))
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return Messages.SR_IS_BROKEN;
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if (TheSR.IsFull)
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return Messages.SRPICKER_SR_FULL;
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if (DiskSize > TheSR.physical_size)
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return string.Format(Messages.SR_PICKER_DISK_TOO_BIG, Util.DiskSizeString(DiskSize, 2),
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Util.DiskSizeString(TheSR.physical_size, 2));
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if (DiskSize > (TheSR.FreeSpace))
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return string.Format(Messages.SR_PICKER_INSUFFICIENT_SPACE, Util.DiskSizeString(DiskSize, 2),
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Util.DiskSizeString(TheSR.FreeSpace, 2));
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return "";
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}
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}
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public int CompareTo(SrPickerItem other)
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{
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return base.CompareTo(other);
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}
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#region Sorting Details
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private enum SrNotEnabledReason { None, Broken, Full, NotSeen };
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private SrNotEnabledReason sortingReason;
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private void CalculateDisabledSortReason()
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{
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if (!TheSR.CanBeSeenFrom(Affinity))
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sortingReason = SrNotEnabledReason.NotSeen;
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else if (TheSR.IsFull || TheSR.FreeSpace < DiskSize)
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sortingReason = SrNotEnabledReason.Full;
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else
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sortingReason = SrNotEnabledReason.Broken;
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}
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private void CalculateEnabledSortReason()
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{
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sortingReason = SrNotEnabledReason.None;
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}
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protected override int SameLevelSortOrder(CustomTreeNode other)
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{
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SrPickerItem otherItem = other as SrPickerItem;
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if (otherItem == null) //shouldnt ever happen!!!
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return -1;
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if (!otherItem.Enabled && Enabled)
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return -1;
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if (otherItem.Enabled && !Enabled)
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return 1;
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if (otherItem.Enabled && Enabled)
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return base.SameLevelSortOrder(otherItem);
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return (int)sortingReason - (int)otherItem.sortingReason;
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}
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#endregion
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}
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}
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