| 1 | /* $Id: vbsfhlp.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VirtualBox Windows Guest Shared Folders - File System Driver system helpers
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2012-2023 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * SPDX-License-Identifier: GPL-3.0-only
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| 26 | */
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| 27 |
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| 28 |
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| 29 | /*********************************************************************************************************************************
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| 30 | * Header Files *
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| 31 | *********************************************************************************************************************************/
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| 32 | #include "vbsf.h"
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| 33 | #include <iprt/err.h>
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| 34 |
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| 35 |
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| 36 | /*********************************************************************************************************************************
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| 37 | * Global Variables *
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| 38 | *********************************************************************************************************************************/
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| 39 | #ifdef DEBUG
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| 40 | static int volatile g_cAllocations = 0;
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| 41 | #endif
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| 42 |
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| 43 |
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| 44 | /**
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| 45 | * Convert VBox error code to NT status code
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| 46 | *
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| 47 | * @returns NT status code
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| 48 | * @param vrc VBox status code.
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| 49 | *
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| 50 | */
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| 51 | NTSTATUS vbsfNtVBoxStatusToNt(int vrc)
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| 52 | {
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| 53 | NTSTATUS Status;
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| 54 |
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| 55 | switch (vrc)
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| 56 | {
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| 57 | case VINF_SUCCESS:
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| 58 | Status = STATUS_SUCCESS;
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| 59 | break;
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| 60 |
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| 61 | case VERR_ACCESS_DENIED:
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| 62 | Status = STATUS_ACCESS_DENIED;
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| 63 | break;
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| 64 |
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| 65 | case VERR_NO_MORE_FILES:
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| 66 | Status = STATUS_NO_MORE_FILES;
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| 67 | break;
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| 68 |
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| 69 | case VERR_PATH_NOT_FOUND:
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| 70 | Status = STATUS_OBJECT_PATH_NOT_FOUND;
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| 71 | break;
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| 72 |
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| 73 | case VERR_FILE_NOT_FOUND:
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| 74 | Status = STATUS_OBJECT_NAME_NOT_FOUND;
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| 75 | break;
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| 76 |
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| 77 | case VERR_DIR_NOT_EMPTY:
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| 78 | Status = STATUS_DIRECTORY_NOT_EMPTY;
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| 79 | break;
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| 80 |
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| 81 | case VERR_SHARING_VIOLATION:
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| 82 | Status = STATUS_SHARING_VIOLATION;
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| 83 | break;
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| 84 |
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| 85 | case VERR_FILE_LOCK_VIOLATION:
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| 86 | Status = STATUS_FILE_LOCK_CONFLICT;
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| 87 | break;
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| 88 |
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| 89 | case VERR_FILE_LOCK_FAILED:
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| 90 | Status = STATUS_LOCK_NOT_GRANTED;
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| 91 | break;
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| 92 |
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| 93 | case VINF_BUFFER_OVERFLOW:
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| 94 | Status = STATUS_BUFFER_OVERFLOW;
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| 95 | break;
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| 96 |
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| 97 | case VERR_EOF:
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| 98 | case VINF_EOF:
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| 99 | Status = STATUS_END_OF_FILE;
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| 100 | break;
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| 101 |
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| 102 | case VERR_READ_ERROR:
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| 103 | case VERR_WRITE_ERROR:
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| 104 | case VERR_FILE_IO_ERROR:
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| 105 | Status = STATUS_UNEXPECTED_IO_ERROR;
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| 106 | break;
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| 107 |
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| 108 | case VERR_WRITE_PROTECT:
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| 109 | Status = STATUS_MEDIA_WRITE_PROTECTED;
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| 110 | break;
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| 111 |
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| 112 | case VERR_ALREADY_EXISTS:
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| 113 | Status = STATUS_OBJECT_NAME_COLLISION;
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| 114 | break;
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| 115 |
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| 116 | case VERR_NOT_A_DIRECTORY:
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| 117 | Status = STATUS_NOT_A_DIRECTORY;
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| 118 | break;
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| 119 |
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| 120 | case VERR_SEEK:
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| 121 | Status = STATUS_INVALID_PARAMETER;
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| 122 | break;
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| 123 |
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| 124 | case VERR_INVALID_PARAMETER:
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| 125 | Status = STATUS_INVALID_PARAMETER;
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| 126 | break;
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| 127 |
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| 128 | case VERR_NOT_SUPPORTED:
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| 129 | Status = STATUS_NOT_SUPPORTED;
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| 130 | break;
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| 131 |
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| 132 | case VERR_INVALID_NAME:
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| 133 | Status = STATUS_OBJECT_NAME_INVALID;
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| 134 | break;
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| 135 |
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| 136 | default:
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| 137 | Status = STATUS_INVALID_PARAMETER;
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| 138 | Log(("Unexpected vbox error %Rrc\n",
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| 139 | vrc));
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| 140 | break;
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| 141 | }
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| 142 | return Status;
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| 143 | }
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| 144 |
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| 145 | /**
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| 146 | * Wrapper around ExAllocatePoolWithTag.
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| 147 | */
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| 148 | PVOID vbsfNtAllocNonPagedMem(ULONG cbMemory)
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| 149 | {
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| 150 | /* Tag is reversed (a.k.a "SHFL") to display correctly in debuggers, so search for "SHFL" */
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| 151 | PVOID pMemory = ExAllocatePoolWithTag(NonPagedPool, cbMemory, 'LFHS');
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| 152 | if (NULL != pMemory)
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| 153 | {
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| 154 | RtlZeroMemory(pMemory, cbMemory);
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| 155 | #ifdef DEBUG
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| 156 | int const cAllocations = g_cAllocations += 1;
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| 157 | Log(("vbsfNtAllocNonPagedMem: Allocated %u bytes of memory at %p (g_iAllocRefCount=%d)\n", cbMemory, pMemory, cAllocations));
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| 158 | #endif
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| 159 | }
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| 160 | #ifdef DEBUG
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| 161 | else
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| 162 | Log(("vbsfNtAllocNonPagedMem: ERROR: Could not allocate %u bytes of memory!\n", cbMemory));
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| 163 | #endif
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| 164 | return pMemory;
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| 165 | }
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| 166 |
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| 167 | /**
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| 168 | * Wrapper around ExFreePoolWithTag.
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| 169 | */
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| 170 | void vbsfNtFreeNonPagedMem(PVOID pvMemory)
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| 171 | {
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| 172 | #ifdef DEBUG
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| 173 | int cAllocations = g_cAllocations -= 1;
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| 174 | Log(("vbsfNtFreeNonPagedMem: %p (g_cAllocations=%d)\n", pvMemory, cAllocations));
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| 175 | #endif
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| 176 | AssertPtr(pvMemory);
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| 177 |
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| 178 | /* Tagged allocations must be freed using the same tag as used when allocating the memory. */
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| 179 | ExFreePoolWithTag(pvMemory, 'LFHS');
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| 180 | }
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| 181 |
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| 182 | /** Allocate and initialize a SHFLSTRING from a UNICODE string.
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| 183 | *
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| 184 | * @param ppShflString Where to store the pointer to the allocated SHFLSTRING structure.
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| 185 | * The structure must be deallocated with vbsfNtFreeNonPagedMem.
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| 186 | * @param pwc The UNICODE string. If NULL then SHFL is only allocated.
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| 187 | * @param cb Size of the UNICODE string in bytes without the trailing nul.
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| 188 | *
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| 189 | * @return Status code.
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| 190 | */
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| 191 | NTSTATUS vbsfNtShflStringFromUnicodeAlloc(PSHFLSTRING *ppShflString, const WCHAR *pwc, uint16_t cb)
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| 192 | {
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| 193 | NTSTATUS Status;
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| 194 |
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| 195 | /* Calculate length required for the SHFL structure: header + chars + nul. */
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| 196 | ULONG const cbShflString = SHFLSTRING_HEADER_SIZE + cb + sizeof(WCHAR);
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| 197 | PSHFLSTRING pShflString = (PSHFLSTRING)vbsfNtAllocNonPagedMem(cbShflString);
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| 198 | if (pShflString)
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| 199 | {
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| 200 | if (ShflStringInitBuffer(pShflString, cbShflString))
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| 201 | {
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| 202 | if (pwc)
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| 203 | {
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| 204 | RtlCopyMemory(pShflString->String.ucs2, pwc, cb);
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| 205 | pShflString->String.ucs2[cb / sizeof(WCHAR)] = 0;
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| 206 | pShflString->u16Length = cb; /* without terminating null */
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| 207 | AssertMsg(pShflString->u16Length + sizeof(WCHAR) == pShflString->u16Size,
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| 208 | ("u16Length %d, u16Size %d\n", pShflString->u16Length, pShflString->u16Size));
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| 209 | }
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| 210 | else
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| 211 | {
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| 212 | /** @todo r=bird: vbsfNtAllocNonPagedMem already zero'ed it... */
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| 213 | RtlZeroMemory(pShflString->String.ucs2, cb + sizeof(WCHAR));
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| 214 | pShflString->u16Length = 0; /* without terminating null */
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| 215 | AssertMsg(pShflString->u16Size >= sizeof(WCHAR),
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| 216 | ("u16Size %d\n", pShflString->u16Size));
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| 217 | }
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| 218 |
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| 219 | *ppShflString = pShflString;
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| 220 | Status = STATUS_SUCCESS;
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| 221 | }
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| 222 | else
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| 223 | {
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| 224 | vbsfNtFreeNonPagedMem(pShflString);
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| 225 | Status = STATUS_INSUFFICIENT_RESOURCES;
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| 226 | }
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| 227 | }
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| 228 | else
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| 229 | Status = STATUS_INSUFFICIENT_RESOURCES;
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| 230 |
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| 231 | return Status;
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| 232 | }
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| 233 |
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| 234 | #if defined(DEBUG) || defined(LOG_ENABLED)
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| 235 |
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| 236 | /** Debug routine for translating a minor PNP function to a string. */
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| 237 | static const char *vbsfNtMinorPnpFunctionName(LONG MinorFunction)
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| 238 | {
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| 239 | switch (MinorFunction)
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| 240 | {
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| 241 | case IRP_MN_START_DEVICE:
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| 242 | return "IRP_MJ_PNP - IRP_MN_START_DEVICE";
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| 243 | case IRP_MN_QUERY_REMOVE_DEVICE:
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| 244 | return "IRP_MJ_PNP - IRP_MN_QUERY_REMOVE_DEVICE";
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| 245 | case IRP_MN_REMOVE_DEVICE:
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| 246 | return "IRP_MJ_PNP - IRP_MN_REMOVE_DEVICE";
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| 247 | case IRP_MN_CANCEL_REMOVE_DEVICE:
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| 248 | return "IRP_MJ_PNP - IRP_MN_CANCEL_REMOVE_DEVICE";
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| 249 | case IRP_MN_STOP_DEVICE:
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| 250 | return "IRP_MJ_PNP - IRP_MN_STOP_DEVICE";
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| 251 | case IRP_MN_QUERY_STOP_DEVICE:
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| 252 | return "IRP_MJ_PNP - IRP_MN_QUERY_STOP_DEVICE";
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| 253 | case IRP_MN_CANCEL_STOP_DEVICE:
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| 254 | return "IRP_MJ_PNP - IRP_MN_CANCEL_STOP_DEVICE";
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| 255 | case IRP_MN_QUERY_DEVICE_RELATIONS:
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| 256 | return "IRP_MJ_PNP - IRP_MN_QUERY_DEVICE_RELATIONS";
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| 257 | case IRP_MN_QUERY_INTERFACE:
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| 258 | return "IRP_MJ_PNP - IRP_MN_QUERY_INTERFACE";
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| 259 | case IRP_MN_QUERY_CAPABILITIES:
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| 260 | return "IRP_MJ_PNP - IRP_MN_QUERY_CAPABILITIES";
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| 261 | case IRP_MN_QUERY_RESOURCES:
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| 262 | return "IRP_MJ_PNP - IRP_MN_QUERY_RESOURCES";
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| 263 | case IRP_MN_QUERY_RESOURCE_REQUIREMENTS:
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| 264 | return "IRP_MJ_PNP - IRP_MN_QUERY_RESOURCE_REQUIREMENTS";
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| 265 | case IRP_MN_QUERY_DEVICE_TEXT:
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| 266 | return "IRP_MJ_PNP - IRP_MN_QUERY_DEVICE_TEXT";
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| 267 | case IRP_MN_FILTER_RESOURCE_REQUIREMENTS:
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| 268 | return "IRP_MJ_PNP - IRP_MN_FILTER_RESOURCE_REQUIREMENTS";
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| 269 | case IRP_MN_READ_CONFIG:
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| 270 | return "IRP_MJ_PNP - IRP_MN_READ_CONFIG";
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| 271 | case IRP_MN_WRITE_CONFIG:
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| 272 | return "IRP_MJ_PNP - IRP_MN_WRITE_CONFIG";
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| 273 | case IRP_MN_EJECT:
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| 274 | return "IRP_MJ_PNP - IRP_MN_EJECT";
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| 275 | case IRP_MN_SET_LOCK:
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| 276 | return "IRP_MJ_PNP - IRP_MN_SET_LOCK";
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| 277 | case IRP_MN_QUERY_ID:
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| 278 | return "IRP_MJ_PNP - IRP_MN_QUERY_ID";
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| 279 | case IRP_MN_QUERY_PNP_DEVICE_STATE:
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| 280 | return "IRP_MJ_PNP - IRP_MN_QUERY_PNP_DEVICE_STATE";
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| 281 | case IRP_MN_QUERY_BUS_INFORMATION:
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| 282 | return "IRP_MJ_PNP - IRP_MN_QUERY_BUS_INFORMATION";
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| 283 | case IRP_MN_DEVICE_USAGE_NOTIFICATION:
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| 284 | return "IRP_MJ_PNP - IRP_MN_DEVICE_USAGE_NOTIFICATION";
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| 285 | case IRP_MN_SURPRISE_REMOVAL:
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| 286 | return "IRP_MJ_PNP - IRP_MN_SURPRISE_REMOVAL";
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| 287 | default:
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| 288 | return "IRP_MJ_PNP - unknown_pnp_irp";
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| 289 | }
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| 290 | }
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| 291 |
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| 292 | /** Debug routine for translating a major+minor IPR function to a string. */
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| 293 | const char *vbsfNtMajorFunctionName(UCHAR MajorFunction, LONG MinorFunction)
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| 294 | {
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| 295 | switch (MajorFunction)
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| 296 | {
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| 297 | RT_CASE_RET_STR(IRP_MJ_CREATE);
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| 298 | RT_CASE_RET_STR(IRP_MJ_CREATE_NAMED_PIPE);
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| 299 | RT_CASE_RET_STR(IRP_MJ_CLOSE);
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| 300 | RT_CASE_RET_STR(IRP_MJ_READ);
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| 301 | RT_CASE_RET_STR(IRP_MJ_WRITE);
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| 302 | RT_CASE_RET_STR(IRP_MJ_QUERY_INFORMATION);
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| 303 | RT_CASE_RET_STR(IRP_MJ_SET_INFORMATION);
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| 304 | RT_CASE_RET_STR(IRP_MJ_QUERY_EA);
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| 305 | RT_CASE_RET_STR(IRP_MJ_SET_EA);
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| 306 | RT_CASE_RET_STR(IRP_MJ_FLUSH_BUFFERS);
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| 307 | RT_CASE_RET_STR(IRP_MJ_QUERY_VOLUME_INFORMATION);
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| 308 | RT_CASE_RET_STR(IRP_MJ_SET_VOLUME_INFORMATION);
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| 309 | RT_CASE_RET_STR(IRP_MJ_DIRECTORY_CONTROL);
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| 310 | RT_CASE_RET_STR(IRP_MJ_FILE_SYSTEM_CONTROL);
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| 311 | RT_CASE_RET_STR(IRP_MJ_DEVICE_CONTROL);
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| 312 | RT_CASE_RET_STR(IRP_MJ_INTERNAL_DEVICE_CONTROL);
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| 313 | RT_CASE_RET_STR(IRP_MJ_SHUTDOWN);
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| 314 | RT_CASE_RET_STR(IRP_MJ_LOCK_CONTROL);
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| 315 | RT_CASE_RET_STR(IRP_MJ_CLEANUP);
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| 316 | RT_CASE_RET_STR(IRP_MJ_CREATE_MAILSLOT);
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| 317 | RT_CASE_RET_STR(IRP_MJ_QUERY_SECURITY);
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| 318 | RT_CASE_RET_STR(IRP_MJ_SET_SECURITY);
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| 319 | RT_CASE_RET_STR(IRP_MJ_POWER);
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| 320 | RT_CASE_RET_STR(IRP_MJ_SYSTEM_CONTROL);
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| 321 | RT_CASE_RET_STR(IRP_MJ_DEVICE_CHANGE);
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| 322 | RT_CASE_RET_STR(IRP_MJ_QUERY_QUOTA);
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| 323 | RT_CASE_RET_STR(IRP_MJ_SET_QUOTA);
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| 324 | case IRP_MJ_PNP:
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| 325 | return vbsfNtMinorPnpFunctionName(MinorFunction);
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| 326 | default:
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| 327 | return "IRP_MJ_UNKNOWN";
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| 328 | }
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| 329 | }
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| 330 |
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| 331 | #endif /* DEBUG || LOG_ENABLED */
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| 332 |
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