/// <summary>
/// Whether the underlying SR backend supports SR_TRIM
/// </summary>
public bool SupportsTrim()
{
System.Diagnostics.Trace.Assert(Connection != null, "Connection must not be null");
SM sm = SM.GetByType(Connection, type);
return(sm != null && sm.features != null && sm.features.ContainsKey("SR_TRIM"));
}
/// <summary>
/// Whether the underlying SR backend supports storage migration. Will return true even if the SR is full.
/// </summary>
/// <returns></returns>
public virtual bool SupportsStorageMigration()
{
// ISO and Memory SRs should not support migration
if (content_type == SR.Content_Type_ISO || GetSRType(false) == SR.SRTypes.tmpfs)
{
return(false);
}
SM sm = SM.GetByType(Connection, type);
return(sm != null && Array.IndexOf(sm.capabilities, "VDI_MIRROR") != -1 && Array.IndexOf(sm.capabilities, "VDI_SNAPSHOT") != -1);
}
/// <summary>
/// Whether the underlying SR backend supports storage migration. Will return true even if the SR is full.
/// </summary>
/// <returns></returns>
public virtual bool SupportsStorageMigration()
{
// ISO and Memory SRs should not support migration
if (content_type == SR.Content_Type_ISO || GetSRType(false) == SR.SRTypes.tmpfs)
{
return(false);
}
SM sm = SM.GetByType(Connection, type);
// check if the SM has VDI_SNAPSHOT and VDI_MIRROR capabilities; the VDI_MIRROR capability has only been added in Ely (API Version 2.6)
return(sm != null && Array.IndexOf(sm.capabilities, "VDI_SNAPSHOT") != -1 && (Array.IndexOf(sm.capabilities, "VDI_MIRROR") != -1 || !Helpers.ElyOrGreater(Connection)));
}
/// <summary>
/// Whether the underlying SR backend supports read caching.
/// </summary>
/// <returns></returns>
public bool SupportsReadCaching()
{
// for Stockholm or greater versions, check if the SM has the VDI_READ_CACHING capability
if (Helpers.StockholmOrGreater(Connection))
{
var sm = SM.GetByType(Connection, type);
return(sm?.features != null && sm.features.ContainsKey("VDI_READ_CACHING"));
}
// for older versions, use the SR type; read caching is available for NFS, EXT3 and SMB/CIFS SR types
var srType = GetSRType(false);
return(srType == SRTypes.nfs || srType == SRTypes.ext || srType == SRTypes.smb);
}
public string FriendlyTypeName()
{
var srType = GetSRType(false);
if (srType == SRTypes.unknown)
{
var sm = SM.GetByType(Connection, type);
if (sm != null &&
Version.TryParse(sm.required_api_version, out var smapiVersion) &&
smapiVersion.CompareTo(new Version(3, 0)) >= 0)
{
return(!string.IsNullOrEmpty(sm.name_label) ? sm.name_label : type);
}
}
return(GetFriendlyTypeName(srType));
}
/// <summary>
/// Whether the underlying SR backend supports VDI_CREATE. Will return true even if the SR is full.
/// </summary>
public virtual bool SupportsVdiCreate()
{
// ISO SRs are deemed not to support VDI create in the GUI, even though the back end
// knows that they do. See CA-40119.
if (content_type == SR.Content_Type_ISO)
{
return(false);
}
// Memory SRs should not support VDI create in the GUI
if (GetSRType(false) == SR.SRTypes.tmpfs)
{
return(false);
}
SM sm = SM.GetByType(Connection, type);
return(sm != null && -1 != Array.IndexOf(sm.capabilities, "VDI_CREATE"));
}
/// <summary>
/// Whether the underlying SR backend supports VDI_CREATE. Will return true even if the SR is full.
/// </summary>
/// <param name="connection"></param>
/// <returns></returns>
public virtual bool SupportsVdiCreate()
{
// ISO SRs are deemed not to support VDI create in the GUI, even though the back end
// knows that they do. See CA-40119.
if (content_type == SR.Content_Type_ISO)
{
return(false);
}
Host master = Helpers.GetMaster(Connection);
if (master == null)
{
return(false);
}
SM sm = SM.GetByType(Connection, type);
return(sm != null && -1 != Array.IndexOf(sm.capabilities, "VDI_CREATE"));
}
public SM GetSM()
{
return(SM.GetByType(Connection, GetSRType(true).ToString()));
}
