315 lines
12 KiB
Plaintext
315 lines
12 KiB
Plaintext
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////////////////////////////////////////////////////////////////////////////////
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//
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// Microsoft Research Singularity//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// File: Node.sg
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//
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// Note:
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//
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using System;
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using System.Text;
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using System.Collections;
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using System.Threading;
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using Microsoft.SingSharp;
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using Microsoft.Singularity;
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using Microsoft.Singularity.Channels;
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using Microsoft.Singularity.Directory;
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using Microsoft.Singularity.Security;
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#if !SINGULARITY_PROCESS
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namespace Microsoft.Singularity.Directory
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#else
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using Microsoft.Singularity;
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using Microsoft.Singularity.V1.Services;
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namespace Microsoft.Application.DSP
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#endif
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{
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public abstract class Node
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{
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// base class for all node types in name space
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private string nodeName;
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/// <summary>
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/// The policy object controlling the access to this node
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/// </summary>
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private AclCore! core;
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private IAclPolicy! policy;
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/// <summary>
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/// ACLs here are not persistent.
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/// </summary>
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private Acl acl = Acl.nullAcl;
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private IAclRule rule = null;
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private readonly NodeType nodeType;
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protected Node(NodeType nodeType, string! name, AclCore! core, IAclPolicy! policy)
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{
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this.nodeType = nodeType;
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this.nodeName = name;
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this.core = core;
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this.policy = policy;
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}
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protected Node(NodeType nodeType, string! name, Node! parent)
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{
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this.nodeType = nodeType;
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this.nodeName = parent.nodeName + "/" + name;
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this.core = parent.core;
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this.policy = parent.policy;
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}
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private Acl GetObjectAcl()
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{
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lock (this) {
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if (acl.val != null) {
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if (rule == null || rule.Valid)
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return acl;
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}
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acl = policy.LookupAndExpand(nodeName, out rule);
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return acl;
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}
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}
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public bool CheckAccess(AccessMode! permission, Principal pr)
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{
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Acl acl = GetObjectAcl();
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return core.CheckAccess(acl, permission, pr);
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}
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public bool CheckAccess(AccessMode! permission, Principal pr, Endpoint*! in ExHeap ep)
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{
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Acl acl = GetObjectAcl();
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if (!core.CheckAccess(acl, permission, pr))
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return false;
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Principal pr2 = AclCore.EndpointPeer(ep);
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if (pr.Equal(pr2))
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return true;
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return core.CheckAccess(acl, permission, AclCore.EndpointPeer(ep));
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}
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public Acl GetInstanceAcl()
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{
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lock (this) {
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if (rule == null)
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return acl;
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}
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return Acl.nullAcl;
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}
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public void SetInstanceAcl(Acl acl)
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{
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lock (this) {
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this.acl = acl;
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this.rule = null;
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}
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}
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public string! FullName { get { return nodeName; } }
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/// <returns>
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/// null on success, the service argument if it failed.
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/// </returns>
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public abstract ServiceContract.Exp Bind(StringBuilder! p,
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Principal pr,
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out bool success,
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out bool linkFound,
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out ErrorCode error,
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out bool reparse,
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out string link,
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[Claims]
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ServiceContract.Exp! service);
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/// CreateAndBindFile
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/// <returns>
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/// true if success false if it fails.
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/// </returns>
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public abstract FileContract.Imp CreateAndBindFile(StringBuilder! p,
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Principal pr,
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out bool linkFound,
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out ErrorCode error,
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out bool reparse,
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out string link
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);
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/// CreateDirectory
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/// <returns>
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/// true if success false if it fails.
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/// </returns>
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public abstract bool CreateDirectory(StringBuilder! p,
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Principal pr,
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out bool linkFound,
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out ErrorCode error,
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out bool reparse,
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out string link
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);
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/// CreateFile
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/// <returns>
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/// true if success false if it fails.
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/// </returns>
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public abstract bool CreateFile(StringBuilder! p,
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Principal pr,
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out bool linkFound,
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out ErrorCode error,
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out bool reparse,
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out string link
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);
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/// CreateFile
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/// <returns>
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/// true if success false if it fails.
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/// </returns>
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public abstract bool CreateLink(StringBuilder! p,
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Principal pr,
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string! value,
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out bool linkFound,
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out ErrorCode error,
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out bool reparse,
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out string link
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);
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/// DeleteDirectory
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/// <returns>
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/// true if success false if it fails.
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/// </returns>
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public abstract bool DeleteDirectory(StringBuilder! p,
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Principal pr,
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out bool linkFound,
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out ErrorCode error,
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out bool reparse,
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out string link
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);
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/// DeleteFileusing Microsoft.SingSharp;
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/// <returns>
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/// true if success false if it fails.
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/// </returns>
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public abstract bool DeleteFile(StringBuilder! p,
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Principal pr,
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out bool linkFound,
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out ErrorCode error,
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out bool reparse,
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out string link
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);
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/// DeleteLink
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/// <returns>
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/// true if success false if it fails.
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/// </returns>
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public abstract bool DeleteLink(StringBuilder! p,
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Principal pr,
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out bool linkFound,
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out ErrorCode error,
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out bool reparse,
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out string link
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);
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/// GetLinkValue
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/// <returns>
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/// true if success false if it fails.
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/// </returns>
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public abstract bool GetLinkValue(StringBuilder! p,
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Principal pr,
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out bool linkFound,
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out ErrorCode error,
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out bool reparse,
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out string link
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);
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/// <returns>
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/// The endpoint on success, null, if it fails.
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/// </returns>
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public abstract ServiceProviderContract.Imp:Start Deregister(StringBuilder! path,
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Principal pr,
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DirectoryServiceContract.Exp! ep,
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out bool linkFound,
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out ErrorCode error,
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out bool reparse,
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out string link
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);
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/// <returns>
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/// true if success false if it fails.
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/// </returns>
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public abstract bool GetAttributes(StringBuilder! p,
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Principal pr,
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out bool linkFound,
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out ErrorCode error,
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out bool reparse,
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out string link,
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out long length,
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out NodeType nodeType
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);
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/// <returns>
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/// null on success, the imp argument if it failed.
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/// </returns>
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public abstract NotifyContract.Imp Notify(StringBuilder! pathSpec,
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Principal pr,
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string! pattern,
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bool sendExisting,
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out bool linkFound,
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out ErrorCode error,
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out bool reparse,
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out string link,
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[Claims] NotifyContract.Imp! notifyImp);
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/// QueryACL
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/// <returns>
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/// true if success false if it fails.
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/// </returns>
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public abstract bool QueryACL(StringBuilder! p,
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Principal pr,
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out bool linkFound,
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out ErrorCode error,
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out bool reparse,
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out string link,
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out Acl acl
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);
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/// Register
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/// <returns>
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/// true if success false if it fails.
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/// </returns>
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public abstract ServiceProviderContract.Imp Register(StringBuilder! p,
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Principal pr,
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[Claims]ServiceProviderContract.Imp! sp,
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out bool linkFound,
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out ErrorCode error,
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out bool reparse,
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out string link
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);
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/// StoreACL
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/// <returns>
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/// true if success false if it fails.
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/// </returns>
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public abstract bool StoreACL(StringBuilder! p,
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Principal pr,
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Acl acl,
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out bool linkFound,
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out ErrorCode error,
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out bool reparse,
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out string link
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);
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public NodeType Type
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{
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get
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{
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return this.nodeType;
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}
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}
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}
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}
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