xenadmin/XenModel/Actions/SR/SrProbeAction.cs

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using System.Collections.Generic;
using XenAdmin.Network;
using XenAPI;
using XenAdmin.Core;


namespace XenAdmin.Actions
{
    public class SrProbeAction : PureAsyncAction
    {
        private readonly Host host;
        private readonly Dictionary<string, string> dconf;
        private readonly Dictionary<string, string> smconf;

        public SR.SRTypes SrType { get; }
        public List<SR.SRInfo> SRs { get; private set; }

        /// <summary>
        /// Won't appear in the program history (SuppressHistory == true).
        /// </summary>
        public SrProbeAction(IXenConnection connection, Host host, SR.SRTypes srType,
            Dictionary<string, string> dconf, Dictionary<string, string> smconf = null)
            : base(connection, string.Format(Messages.ACTION_SCANNING_SR_FROM, Helpers.GetName(connection)), null, true)
        {
            this.host = host;
            this.SrType = srType;
            this.dconf = dconf;

            string target;
            switch (srType)
            {
                case SR.SRTypes.nfs:
                    target = dconf["server"];
                    break;
                case SR.SRTypes.lvmoiscsi:
                    target = dconf["target"];
                    break;
                case SR.SRTypes.lvmohba:
                case SR.SRTypes.lvmofcoe:
                    target = dconf.ContainsKey("device") ? dconf["device"] : dconf["SCSIid"];
                    break;
                case SR.SRTypes.gfs2:
                    target = dconf.ContainsKey("target") ? dconf["target"] : dconf["SCSIid"];
                    break;
                default:
                    target = Messages.REPAIRSR_SERVER;
                    break;
            }

            Description = string.Format(Messages.ACTION_SR_SCANNING, SR.getFriendlyTypeName(srType), target);

            this.smconf = smconf ?? new Dictionary<string, string>();
        }

        protected override void Run()
        {
            if (SrType != SR.SRTypes.gfs2)
            {
                RelatedTask = SR.async_probe(Session, host.opaque_ref,
                    dconf, SrType.ToString().ToLowerInvariant(), smconf);
                PollToCompletion();
                SRs = SR.ParseSRListXML(Result);
            }
            else
            {
                try
                {
                    var result = SR.probe_ext(this.Session, host.opaque_ref,
                        dconf, SrType.ToString().ToLowerInvariant(), smconf);
                    SRs = SR.ParseSRList(result);
                }
                catch (Failure f)
                {
                    if (f.ErrorDescription.Count > 1 && f.ErrorDescription[0].StartsWith("SR_BACKEND_FAILURE") &&
                        f.ErrorDescription[1] == "DeviceNotFoundException")
                    {
                        //Ignore: special treatment of case where gfs2 cannot see the same devices as lvmohba (CA-335356)
                    }
                    else if (f.ErrorDescription.Count > 1 && f.ErrorDescription[0] == "ISCSILogin" &&
                             dconf.ContainsKey("chapuser") && dconf.ContainsKey("chappassword"))
                    {
                        //Ignore: special treatment of gfs2 chap authentication failure (CA-337280)
                    }
                    else
                        throw;
                }
            }

            Description = Messages.ACTION_SR_SCAN_SUCCESSFUL;
        }
    }
}