xenadmin/XenAdmin/Controls/PvsCacheStorageRow.cs

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/* Copyright (c) Citrix Systems Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms,
* with or without modification, are permitted provided
* that the following conditions are met:
*
* * Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
using System;
using System.Linq;
using System.Windows.Forms;
using XenAdmin.Core;
using XenAPI;
namespace XenAdmin.Controls
{
public partial class PvsCacheStorageRow : UserControl
{
public Host Host { get; private set; }
public PVS_site PvsSite { get; private set; }
public PVS_cache_storage OrigPvsCacheStorage { get; private set; }
public event EventHandler Changed;
private const decimal MIN_CACHE_SIZE_GB = 1;
private const decimal MAX_CACHE_SIZE_GB = 2 * Util.BINARY_KILO; // 2TB
private const decimal DEFAULT_CACHE_SIZE_GB = 10;
private decimal origCacheSizeGb;
public PvsCacheStorageRow(Host host, PVS_site site)
{
InitializeComponent();
Host = host;
PvsSite = site;
OrigPvsCacheStorage = site != null ? site.PvsCacheStorage(host) : null;
Populate();
}
private void Populate()
{
labelHostName.Text = Host.Name;
// initialize cacheSize
SetupCacheSizeSpinner(OrigPvsCacheStorage == null ? DEFAULT_CACHE_SIZE_GB : (decimal)Util.ToGB(OrigPvsCacheStorage.size, 1, RoundingBehaviour.Nearest),
MIN_CACHE_SIZE_GB,
MAX_CACHE_SIZE_GB);
origCacheSizeGb = numericUpDownCacheSize.Value;
PopulateCacheSrCombobox();
}
private void PopulateCacheSrCombobox()
{
comboBoxCacheSr.Items.Clear();
// add the "Not configured" item first
var notConfiguredItem = new ToStringWrapper<SR>(null, Messages.PVS_CACHE_NOT_CONFIGURED);
comboBoxCacheSr.Items.Add(notConfiguredItem);
comboBoxCacheSr.SelectedItem = notConfiguredItem;
// add Memeory SR; if no memory SR found, add a placeholder (we will create the memory SR in ConfigurePvsCacheAction)
var memorySr = Host.Connection.Cache.SRs.FirstOrDefault(s => s.GetSRType(false) == SR.SRTypes.tmpfs && s.CanBeSeenFrom(Host));
if (memorySr == null)
{
// create a placeholder for the memory SR
memorySr = new SR
{
type = SR.SRTypes.tmpfs.ToString(),
name_label = Messages.PVS_CACHE_MEMORY_SR_NAME,
shared = false,
opaque_ref = Helper.NullOpaqueRef
};
}
var memorySrItem = new ToStringWrapper<SR>(memorySr, Messages.PVS_CACHE_MEMORY_ONLY);
comboBoxCacheSr.Items.Add(memorySrItem);
if (OrigPvsCacheStorage != null && memorySr.opaque_ref == OrigPvsCacheStorage.SR.opaque_ref)
comboBoxCacheSr.SelectedItem = memorySrItem;
// add all suitable SRs
var availableSRs = Host.Connection.Cache.SRs.Where(s => s.CanBeSeenFrom(Host) && SrIsSuitableForPvsCache(s)).ToList();
availableSRs.Sort();
foreach (var sr in availableSRs)
{
var newItem = new ToStringWrapper<SR>(sr, sr.Name);
comboBoxCacheSr.Items.Add(newItem);
if (OrigPvsCacheStorage != null && sr.opaque_ref == OrigPvsCacheStorage.SR.opaque_ref)
comboBoxCacheSr.SelectedItem = newItem;
}
}
private bool SrIsSuitableForPvsCache(SR sr)
{
return sr.Show(Properties.Settings.Default.ShowHiddenVMs) && sr.SupportsVdiCreate() && sr.FreeSpace >= MIN_CACHE_SIZE_GB * Util.BINARY_GIGA;
}
private void SetupCacheSizeSpinner(decimal value, decimal min, decimal max)
{
if (min > max)
max = min;
numericUpDownCacheSize.Minimum = min;
numericUpDownCacheSize.Maximum = max;
if (value < numericUpDownCacheSize.Minimum)
value = numericUpDownCacheSize.Minimum;
if (value > numericUpDownCacheSize.Maximum)
value = numericUpDownCacheSize.Maximum;
numericUpDownCacheSize.Value = value;
}
private bool _showHeader;
public bool ShowHeader
{
get { return _showHeader; }
set
{
_showHeader = value;
labelCacheStorage.Visible = labelCacheSize.Visible = _showHeader;
tableLayoutPanel1.Refresh();
}
}
public SR CacheSr
{
get
{
var selectedItem = (ToStringWrapper<SR>)comboBoxCacheSr.SelectedItem;
return selectedItem != null ? selectedItem.item : null;
}
}
public long CacheSize
{
get { return (long)numericUpDownCacheSize.Value * Util.BINARY_GIGA; }
}
public bool ValidToSave
{
get { return comboBoxCacheSr.SelectedItem != null && numericUpDownCacheSize.Validate(); }
}
public bool HasChanged
{
get
{
if (OrigPvsCacheStorage == null)
return CacheSr != null;
if (CacheSr == null)
return OrigPvsCacheStorage != null;
return OrigPvsCacheStorage.SR.opaque_ref != CacheSr.opaque_ref || origCacheSizeGb != numericUpDownCacheSize.Value;
}
}
private void SomethingChanged(object sender, EventArgs e)
{
if (Changed != null)
Changed(this, e);
}
private void comboBoxCacheSr_SelectedIndexChanged(object sender, EventArgs e)
{
var selectedSr = CacheSr;
if (selectedSr != null)
{
var maxSize = (decimal)Util.ToGB(selectedSr.GetSRType(false) == SR.SRTypes.tmpfs ? Host.dom0_memory_extra : selectedSr.FreeSpace, 1, RoundingBehaviour.Down);
maxSize = Math.Min(maxSize, MAX_CACHE_SIZE_GB);
if (maxSize != numericUpDownCacheSize.Maximum)
SetupCacheSizeSpinner(numericUpDownCacheSize.Value, numericUpDownCacheSize.Minimum, maxSize);
}
SomethingChanged(this, e);
}
}
}