| 1 | /* $Id: VBoxServiceControl.h 82968 2020-02-04 10:35:17Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VBoxServiceControl.h - Internal guest control definitions.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2013-2020 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 | #ifndef GA_INCLUDED_SRC_common_VBoxService_VBoxServiceControl_h
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| 19 | #define GA_INCLUDED_SRC_common_VBoxService_VBoxServiceControl_h
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| 20 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 21 | # pragma once
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| 22 | #endif
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| 23 |
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| 24 | #include <iprt/critsect.h>
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| 25 | #include <iprt/list.h>
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| 26 | #include <iprt/req.h>
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| 27 |
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| 28 | #include <VBox/VBoxGuestLib.h>
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| 29 | #include <VBox/GuestHost/GuestControl.h>
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| 30 | #include <VBox/HostServices/GuestControlSvc.h>
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| 31 |
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| 32 |
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| 33 | /**
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| 34 | * Pipe IDs for handling the guest process poll set.
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| 35 | */
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| 36 | typedef enum VBOXSERVICECTRLPIPEID
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| 37 | {
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| 38 | VBOXSERVICECTRLPIPEID_UNKNOWN = 0,
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| 39 | VBOXSERVICECTRLPIPEID_STDIN = 10,
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| 40 | VBOXSERVICECTRLPIPEID_STDIN_WRITABLE = 11,
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| 41 | /** Pipe for reading from guest process' stdout. */
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| 42 | VBOXSERVICECTRLPIPEID_STDOUT = 40,
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| 43 | /** Pipe for reading from guest process' stderr. */
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| 44 | VBOXSERVICECTRLPIPEID_STDERR = 50,
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| 45 | /** Notification pipe for waking up the guest process
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| 46 | * control thread. */
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| 47 | VBOXSERVICECTRLPIPEID_IPC_NOTIFY = 100
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| 48 | } VBOXSERVICECTRLPIPEID;
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| 49 |
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| 50 | /**
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| 51 | * Structure for one (opened) guest file.
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| 52 | */
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| 53 | typedef struct VBOXSERVICECTRLFILE
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| 54 | {
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| 55 | /** Pointer to list archor of following
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| 56 | * list node.
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| 57 | * @todo Would be nice to have a RTListGetAnchor(). */
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| 58 | PRTLISTANCHOR pAnchor;
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| 59 | /** Node to global guest control file list. */
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| 60 | /** @todo Use a map later? */
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| 61 | RTLISTNODE Node;
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| 62 | /** The file name. */
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| 63 | char szName[RTPATH_MAX];
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| 64 | /** The file handle on the guest. */
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| 65 | RTFILE hFile;
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| 66 | /** File handle to identify this file. */
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| 67 | uint32_t uHandle;
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| 68 | /** Context ID. */
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| 69 | uint32_t uContextID;
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| 70 | /** RTFILE_O_XXX flags. */
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| 71 | uint64_t fOpen;
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| 72 | } VBOXSERVICECTRLFILE;
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| 73 | /** Pointer to thread data. */
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| 74 | typedef VBOXSERVICECTRLFILE *PVBOXSERVICECTRLFILE;
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| 75 |
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| 76 | typedef struct VBOXSERVICECTRLSESSIONSTARTUPINFO
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| 77 | {
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| 78 | /** The session's protocol version to use. */
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| 79 | uint32_t uProtocol;
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| 80 | /** The session's ID. */
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| 81 | uint32_t uSessionID;
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| 82 | /** User name (account) to start the guest session under. */
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| 83 | char szUser[GUESTPROCESS_MAX_USER_LEN];
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| 84 | /** Password of specified user name (account). */
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| 85 | char szPassword[GUESTPROCESS_MAX_PASSWORD_LEN];
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| 86 | /** Domain of the user account. */
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| 87 | char szDomain[GUESTPROCESS_MAX_DOMAIN_LEN];
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| 88 | /** Session creation flags.
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| 89 | * @sa VBOXSERVICECTRLSESSIONSTARTUPFLAG_* flags. */
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| 90 | uint32_t fFlags;
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| 91 | } VBOXSERVICECTRLSESSIONSTARTUPINFO;
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| 92 | /** Pointer to thread data. */
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| 93 | typedef VBOXSERVICECTRLSESSIONSTARTUPINFO *PVBOXSERVICECTRLSESSIONSTARTUPINFO;
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| 94 |
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| 95 | /**
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| 96 | * Structure for a guest session thread to
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| 97 | * observe/control the forked session instance from
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| 98 | * the VBoxService main executable.
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| 99 | */
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| 100 | typedef struct VBOXSERVICECTRLSESSIONTHREAD
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| 101 | {
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| 102 | /** Node to global guest control session list. */
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| 103 | /** @todo Use a map later? */
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| 104 | RTLISTNODE Node;
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| 105 | /** The sessions's startup info. */
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| 106 | VBOXSERVICECTRLSESSIONSTARTUPINFO StartupInfo;
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| 107 | /** Critical section for thread-safe use. */
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| 108 | RTCRITSECT CritSect;
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| 109 | /** The worker thread. */
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| 110 | RTTHREAD Thread;
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| 111 | /** Process handle for forked child. */
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| 112 | RTPROCESS hProcess;
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| 113 | /** Shutdown indicator; will be set when the thread
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| 114 | * needs (or is asked) to shutdown. */
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| 115 | bool volatile fShutdown;
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| 116 | /** Indicator set by the service thread exiting. */
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| 117 | bool volatile fStopped;
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| 118 | /** Whether the thread was started or not. */
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| 119 | bool fStarted;
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| 120 | #if 0 /* Pipe IPC not used yet. */
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| 121 | /** Pollset containing all the pipes. */
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| 122 | RTPOLLSET hPollSet;
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| 123 | RTPIPE hStdInW;
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| 124 | RTPIPE hStdOutR;
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| 125 | RTPIPE hStdErrR;
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| 126 | struct StdPipe
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| 127 | {
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| 128 | RTHANDLE hChild;
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| 129 | PRTHANDLE phChild;
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| 130 | } StdIn,
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| 131 | StdOut,
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| 132 | StdErr;
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| 133 | /** The notification pipe associated with this guest session.
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| 134 | * This is NIL_RTPIPE for output pipes. */
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| 135 | RTPIPE hNotificationPipeW;
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| 136 | /** The other end of hNotificationPipeW. */
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| 137 | RTPIPE hNotificationPipeR;
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| 138 | #endif
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| 139 | /** Pipe for handing the secret key to the session process. */
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| 140 | RTPIPE hKeyPipe;
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| 141 | /** Secret key. */
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| 142 | uint8_t abKey[_4K];
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| 143 | } VBOXSERVICECTRLSESSIONTHREAD;
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| 144 | /** Pointer to thread data. */
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| 145 | typedef VBOXSERVICECTRLSESSIONTHREAD *PVBOXSERVICECTRLSESSIONTHREAD;
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| 146 |
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| 147 | /** Flag indicating that this session has been spawned from
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| 148 | * the main executable. */
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| 149 | #define VBOXSERVICECTRLSESSION_FLAG_SPAWN RT_BIT(0)
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| 150 | /** Flag indicating that this session is anonymous, that is,
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| 151 | * it will run start guest processes with the same credentials
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| 152 | * as the main executable. */
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| 153 | #define VBOXSERVICECTRLSESSION_FLAG_ANONYMOUS RT_BIT(1)
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| 154 | /** Flag indicating that started guest processes will dump their
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| 155 | * stdout output to a separate file on disk. For debugging. */
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| 156 | #define VBOXSERVICECTRLSESSION_FLAG_DUMPSTDOUT RT_BIT(2)
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| 157 | /** Flag indicating that started guest processes will dump their
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| 158 | * stderr output to a separate file on disk. For debugging. */
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| 159 | #define VBOXSERVICECTRLSESSION_FLAG_DUMPSTDERR RT_BIT(3)
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| 160 |
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| 161 | /**
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| 162 | * Structure for maintaining a guest session. This also
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| 163 | * contains all started threads (e.g. for guest processes).
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| 164 | *
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| 165 | * This structure can act in two different ways:
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| 166 | * - For legacy guest control handling (protocol version < 2)
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| 167 | * this acts as a per-guest process structure containing all
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| 168 | * the information needed to get a guest process up and running.
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| 169 | * - For newer guest control protocols (>= 2) this structure is
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| 170 | * part of the forked session child, maintaining all guest
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| 171 | * control objects under it.
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| 172 | */
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| 173 | typedef struct VBOXSERVICECTRLSESSION
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| 174 | {
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| 175 | /* The session's startup information. */
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| 176 | VBOXSERVICECTRLSESSIONSTARTUPINFO
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| 177 | StartupInfo;
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| 178 | /** List of active guest process threads
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| 179 | * (VBOXSERVICECTRLPROCESS). */
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| 180 | RTLISTANCHOR lstProcesses;
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| 181 | /** List of guest control files (VBOXSERVICECTRLFILE). */
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| 182 | RTLISTANCHOR lstFiles;
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| 183 | /** The session's critical section. */
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| 184 | RTCRITSECT CritSect;
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| 185 | /** Internal session flags, not related
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| 186 | * to StartupInfo stuff.
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| 187 | * @sa VBOXSERVICECTRLSESSION_FLAG_* flags. */
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| 188 | uint32_t fFlags;
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| 189 | /** How many processes do we allow keeping around at a time? */
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| 190 | uint32_t uProcsMaxKept;
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| 191 | } VBOXSERVICECTRLSESSION;
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| 192 | /** Pointer to guest session. */
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| 193 | typedef VBOXSERVICECTRLSESSION *PVBOXSERVICECTRLSESSION;
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| 194 |
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| 195 | /**
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| 196 | * Structure holding information for starting a guest
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| 197 | * process.
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| 198 | */
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| 199 | typedef struct VBOXSERVICECTRLPROCSTARTUPINFO
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| 200 | {
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| 201 | /** Full qualified path of process to start (without arguments). */
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| 202 | char szCmd[GUESTPROCESS_MAX_CMD_LEN];
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| 203 | /** Process execution flags. @sa */
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| 204 | uint32_t uFlags;
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| 205 | /** Command line arguments. */
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| 206 | char szArgs[GUESTPROCESS_MAX_ARGS_LEN];
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| 207 | /** Number of arguments specified in pszArgs. */
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| 208 | uint32_t uNumArgs;
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| 209 | /** String of environment variables ("FOO=BAR") to pass to the process
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| 210 | * to start. */
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| 211 | char szEnv[GUESTPROCESS_MAX_ENV_LEN];
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| 212 | /** Size (in bytes) of environment variables block. */
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| 213 | uint32_t cbEnv;
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| 214 | /** Number of environment variables specified in pszEnv. */
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| 215 | uint32_t uNumEnvVars;
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| 216 | /** User name (account) to start the process under. */
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| 217 | char szUser[GUESTPROCESS_MAX_USER_LEN];
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| 218 | /** Password of specified user name (account). */
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| 219 | char szPassword[GUESTPROCESS_MAX_PASSWORD_LEN];
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| 220 | /** Domain to be used for authenticating the specified user name (account). */
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| 221 | char szDomain[GUESTPROCESS_MAX_DOMAIN_LEN];
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| 222 | /** Time limit (in ms) of the process' life time. */
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| 223 | uint32_t uTimeLimitMS;
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| 224 | /** Process priority. */
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| 225 | uint32_t uPriority;
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| 226 | /** Process affinity. At the moment we support
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| 227 | * up to 4 * 64 = 256 CPUs. */
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| 228 | uint64_t uAffinity[4];
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| 229 | /** Number of used process affinity blocks. */
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| 230 | uint32_t uNumAffinity;
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| 231 | } VBOXSERVICECTRLPROCSTARTUPINFO;
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| 232 | /** Pointer to a guest process block. */
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| 233 | typedef VBOXSERVICECTRLPROCSTARTUPINFO *PVBOXSERVICECTRLPROCSTARTUPINFO;
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| 234 |
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| 235 | /**
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| 236 | * Structure for holding data for one (started) guest process.
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| 237 | */
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| 238 | typedef struct VBOXSERVICECTRLPROCESS
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| 239 | {
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| 240 | /** Node. */
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| 241 | RTLISTNODE Node;
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| 242 | /** Process handle. */
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| 243 | RTPROCESS hProcess;
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| 244 | /** Number of references using this struct. */
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| 245 | uint32_t cRefs;
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| 246 | /** The worker thread. */
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| 247 | RTTHREAD Thread;
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| 248 | /** The session this guest process
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| 249 | * is bound to. */
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| 250 | PVBOXSERVICECTRLSESSION pSession;
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| 251 | /** Shutdown indicator; will be set when the thread
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| 252 | * needs (or is asked) to shutdown. */
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| 253 | bool volatile fShutdown;
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| 254 | /** Whether the guest process thread was stopped or not. */
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| 255 | bool volatile fStopped;
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| 256 | /** Whether the guest process thread was started or not. */
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| 257 | bool fStarted;
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| 258 | /** Context ID. */
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| 259 | uint32_t uContextID;
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| 260 | /** Critical section for thread-safe use. */
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| 261 | RTCRITSECT CritSect;
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| 262 | /** Process startup information. */
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| 263 | VBOXSERVICECTRLPROCSTARTUPINFO
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| 264 | StartupInfo;
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| 265 | /** The process' PID assigned by the guest OS. */
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| 266 | uint32_t uPID;
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| 267 | /** The process' request queue to handle requests
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| 268 | * from the outside, e.g. the session. */
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| 269 | RTREQQUEUE hReqQueue;
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| 270 | /** Our pollset, used for accessing the process'
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| 271 | * std* pipes + the notification pipe. */
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| 272 | RTPOLLSET hPollSet;
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| 273 | /** StdIn pipe for addressing writes to the
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| 274 | * guest process' stdin.*/
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| 275 | RTPIPE hPipeStdInW;
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| 276 | /** StdOut pipe for addressing reads from
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| 277 | * guest process' stdout.*/
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| 278 | RTPIPE hPipeStdOutR;
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| 279 | /** StdOut pipe for addressing reads from
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| 280 | * guest process' stdout.*/
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| 281 | RTPIPE hPipeStdErrR;
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| 282 |
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| 283 | /** The write end of the notification pipe that is used to poke the thread
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| 284 | * monitoring the process.
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| 285 | * This is NIL_RTPIPE for output pipes. */
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| 286 | RTPIPE hNotificationPipeW;
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| 287 | /** The other end of hNotificationPipeW, read by vgsvcGstCtrlProcessProcLoop(). */
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| 288 | RTPIPE hNotificationPipeR;
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| 289 | } VBOXSERVICECTRLPROCESS;
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| 290 | /** Pointer to thread data. */
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| 291 | typedef VBOXSERVICECTRLPROCESS *PVBOXSERVICECTRLPROCESS;
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| 292 |
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| 293 | RT_C_DECLS_BEGIN
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| 294 |
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| 295 | extern RTLISTANCHOR g_lstControlSessionThreads;
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| 296 | extern VBOXSERVICECTRLSESSION g_Session;
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| 297 | extern uint32_t g_idControlSvcClient;
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| 298 | extern uint64_t g_fControlHostFeatures0;
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| 299 | extern bool g_fControlSupportsOptimizations;
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| 300 |
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| 301 |
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| 302 | /** @name Guest session thread handling.
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| 303 | * @{ */
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| 304 | extern int VGSvcGstCtrlSessionThreadCreate(PRTLISTANCHOR pList, const PVBOXSERVICECTRLSESSIONSTARTUPINFO pSessionStartupInfo, PVBOXSERVICECTRLSESSIONTHREAD *ppSessionThread);
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| 305 | extern int VGSvcGstCtrlSessionThreadDestroy(PVBOXSERVICECTRLSESSIONTHREAD pSession, uint32_t uFlags);
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| 306 | extern int VGSvcGstCtrlSessionThreadDestroyAll(PRTLISTANCHOR pList, uint32_t uFlags);
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| 307 | extern int VGSvcGstCtrlSessionThreadTerminate(PVBOXSERVICECTRLSESSIONTHREAD pSession);
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| 308 | extern RTEXITCODE VGSvcGstCtrlSessionSpawnInit(int argc, char **argv);
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| 309 | /** @} */
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| 310 | /** @name Per-session functions.
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| 311 | * @{ */
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| 312 | extern PVBOXSERVICECTRLPROCESS VGSvcGstCtrlSessionRetainProcess(PVBOXSERVICECTRLSESSION pSession, uint32_t uPID);
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| 313 | extern int VGSvcGstCtrlSessionClose(PVBOXSERVICECTRLSESSION pSession);
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| 314 | extern int VGSvcGstCtrlSessionDestroy(PVBOXSERVICECTRLSESSION pSession);
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| 315 | extern int VGSvcGstCtrlSessionInit(PVBOXSERVICECTRLSESSION pSession, uint32_t uFlags);
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| 316 | extern int VGSvcGstCtrlSessionHandler(PVBOXSERVICECTRLSESSION pSession, uint32_t uMsg, PVBGLR3GUESTCTRLCMDCTX pHostCtx, void *pvScratchBuf, size_t cbScratchBuf, volatile bool *pfShutdown);
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| 317 | extern int VGSvcGstCtrlSessionProcessAdd(PVBOXSERVICECTRLSESSION pSession, PVBOXSERVICECTRLPROCESS pProcess);
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| 318 | extern int VGSvcGstCtrlSessionProcessRemove(PVBOXSERVICECTRLSESSION pSession, PVBOXSERVICECTRLPROCESS pProcess);
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| 319 | extern int VGSvcGstCtrlSessionProcessStartAllowed(const PVBOXSERVICECTRLSESSION pSession, bool *pbAllowed);
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| 320 | extern int VGSvcGstCtrlSessionReapProcesses(PVBOXSERVICECTRLSESSION pSession);
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| 321 | /** @} */
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| 322 | /** @name Per-guest process functions.
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| 323 | * @{ */
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| 324 | extern int VGSvcGstCtrlProcessFree(PVBOXSERVICECTRLPROCESS pProcess);
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| 325 | extern int VGSvcGstCtrlProcessHandleInput(PVBOXSERVICECTRLPROCESS pProcess, PVBGLR3GUESTCTRLCMDCTX pHostCtx, bool fPendingClose, void *pvBuf, uint32_t cbBuf);
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| 326 | extern int VGSvcGstCtrlProcessHandleOutput(PVBOXSERVICECTRLPROCESS pProcess, PVBGLR3GUESTCTRLCMDCTX pHostCtx, uint32_t uHandle, uint32_t cbToRead, uint32_t uFlags);
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| 327 | extern int VGSvcGstCtrlProcessHandleTerm(PVBOXSERVICECTRLPROCESS pProcess);
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| 328 | extern void VGSvcGstCtrlProcessRelease(PVBOXSERVICECTRLPROCESS pProcess);
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| 329 | extern int VGSvcGstCtrlProcessStart(const PVBOXSERVICECTRLSESSION pSession, const PVBOXSERVICECTRLPROCSTARTUPINFO pStartupInfo, uint32_t uContext);
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| 330 | extern int VGSvcGstCtrlProcessStop(PVBOXSERVICECTRLPROCESS pProcess);
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| 331 | extern int VGSvcGstCtrlProcessWait(const PVBOXSERVICECTRLPROCESS pProcess, RTMSINTERVAL msTimeout, int *pRc);
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| 332 | /** @} */
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| 333 |
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| 334 | RT_C_DECLS_END
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| 335 |
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| 336 | #endif /* !GA_INCLUDED_SRC_common_VBoxService_VBoxServiceControl_h */
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| 337 |
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