Allow to specify file allocation size

src/libraries/Common/src/Interop/Unix/System.Native/Interop.PosixFAllocate.cs

@@ -0,0 +1,17 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Runtime.InteropServices;
+using Microsoft.Win32.SafeHandles;
+
+internal static partial class Interop
+{
+    internal static partial class Sys
+    {
+        /// <summary>
+        /// Returns -1 on ENOSPC, -2 on EFBIG. On success or ignorable error, 0 is returned.
+        /// </summary>
+        [DllImport(Libraries.SystemNative, EntryPoint = "SystemNative_PosixFAllocate", SetLastError = false)]
+        internal static extern int PosixFAllocate(SafeFileHandle fd, long offset, long length);
+    }
+}

src/libraries/Common/src/Interop/Windows/Interop.Errors.cs

@@ -29,6 +29,7 @@ internal static partial class Errors
         internal const int ERROR_FILE_EXISTS = 0x50;
         internal const int ERROR_INVALID_PARAMETER = 0x57;
         internal const int ERROR_BROKEN_PIPE = 0x6D;
+        internal const int ERROR_DISK_FULL = 0x70;
         internal const int ERROR_SEM_TIMEOUT = 0x79;
         internal const int ERROR_CALL_NOT_IMPLEMENTED = 0x78;
         internal const int ERROR_INSUFFICIENT_BUFFER = 0x7A;
@@ -43,6 +44,7 @@ internal static partial class Errors
         internal const int ERROR_ENVVAR_NOT_FOUND = 0xCB;
         internal const int ERROR_FILENAME_EXCED_RANGE = 0xCE;
         internal const int ERROR_EXE_MACHINE_TYPE_MISMATCH = 0xD8;
+        internal const int ERROR_FILE_TOO_LARGE = 0xDF;
         internal const int ERROR_PIPE_BUSY = 0xE7;
         internal const int ERROR_NO_DATA = 0xE8;
         internal const int ERROR_PIPE_NOT_CONNECTED = 0xE9;

src/libraries/Common/src/Interop/Windows/Interop.OBJECT_ATTRIBUTES.cs

@@ -38,19 +38,19 @@ internal unsafe struct OBJECT_ATTRIBUTES
         /// Optional quality of service to be applied to the object. Used to indicate
         /// security impersonation level and context tracking mode (dynamic or static).
         /// </summary>
-        public void* SecurityQualityOfService;
+        public SECURITY_QUALITY_OF_SERVICE* SecurityQualityOfService;
 
         /// <summary>
         /// Equivalent of InitializeObjectAttributes macro with the exception that you can directly set SQOS.
         /// </summary>
-        public unsafe OBJECT_ATTRIBUTES(UNICODE_STRING* objectName, ObjectAttributes attributes, IntPtr rootDirectory)
+        public unsafe OBJECT_ATTRIBUTES(UNICODE_STRING* objectName, ObjectAttributes attributes, IntPtr rootDirectory, SECURITY_QUALITY_OF_SERVICE* securityQualityOfService = null)
         {
             Length = (uint)sizeof(OBJECT_ATTRIBUTES);
             RootDirectory = rootDirectory;
             ObjectName = objectName;
             Attributes = attributes;
             SecurityDescriptor = null;
-            SecurityQualityOfService = null;
+            SecurityQualityOfService = securityQualityOfService;
         }
     }
 

src/libraries/Common/src/Interop/Windows/Interop.SECURITY_QUALITY_OF_SERVICE.cs

@@ -0,0 +1,75 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+internal static partial class Interop
+{
+    /// <summary>
+    /// <a href="https://docs.microsoft.com/en-us/windows/win32/api/winnt/ns-winnt-security_quality_of_service">SECURITY_QUALITY_OF_SERVICE</a> structure.
+    ///  Used to support client impersonation. Client specifies this to a server to allow
+    ///  it to impersonate the client.
+    /// </summary>
+    internal unsafe struct SECURITY_QUALITY_OF_SERVICE
+    {
+        public uint Length;
+        public ImpersonationLevel ImpersonationLevel;
+        public ContextTrackingMode ContextTrackingMode;
+        public BOOLEAN EffectiveOnly;
+
+        public unsafe SECURITY_QUALITY_OF_SERVICE(ImpersonationLevel impersonationLevel, ContextTrackingMode contextTrackingMode, bool effectiveOnly)
+        {
+            Length = (uint)sizeof(SECURITY_QUALITY_OF_SERVICE);
+            ImpersonationLevel = impersonationLevel;
+            ContextTrackingMode = contextTrackingMode;
+            EffectiveOnly = effectiveOnly ? BOOLEAN.TRUE : BOOLEAN.FALSE;
+        }
+    }
+
+    /// <summary>
+    /// <a href="https://msdn.microsoft.com/en-us/library/windows/desktop/aa379572.aspx">SECURITY_IMPERSONATION_LEVEL</a> enumeration values.
+    ///  [SECURITY_IMPERSONATION_LEVEL]
+    /// </summary>
+    public enum ImpersonationLevel : uint
+    {
+        /// <summary>
+        ///  The server process cannot obtain identification information about the client and cannot impersonate the client.
+        ///  [SecurityAnonymous]
+        /// </summary>
+        Anonymous,
+
+        /// <summary>
+        ///  The server process can obtain identification information about the client, but cannot impersonate the client.
+        ///  [SecurityIdentification]
+        /// </summary>
+        Identification,
+
+        /// <summary>
+        ///  The server process can impersonate the client's security context on it's local system.
+        ///  [SecurityImpersonation]
+        /// </summary>
+        Impersonation,
+
+        /// <summary>
+        ///  The server process can impersonate the client's security context on remote systems.
+        ///  [SecurityDelegation]
+        /// </summary>
+        Delegation
+    }
+
+    /// <summary>
+    /// <a href="https://msdn.microsoft.com/en-us/library/cc234317.aspx">SECURITY_CONTEXT_TRACKING_MODE</a>
+    /// </summary>
+    public enum ContextTrackingMode : byte
+    {
+        /// <summary>
+        ///  The server is given a snapshot of the client's security context.
+        ///  [SECURITY_STATIC_TRACKING]
+        /// </summary>
+        Static = 0x00,
+
+        /// <summary>
+        ///  The server is continually updated with changes.
+        ///  [SECURITY_DYNAMIC_TRACKING]
+        /// </summary>
+        Dynamic = 0x01
+    }
+}

src/libraries/Common/src/Interop/Windows/NtDll/Interop.NtCreateFile.cs

@@ -2,39 +2,47 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System;
+using System.Diagnostics;
+using System.IO;
 using System.Runtime.InteropServices;
 
 internal static partial class Interop
 {
     internal static partial class NtDll
     {
+        internal const uint NT_ERROR_STATUS_DISK_FULL = 0xC000007F;
+        internal const uint NT_ERROR_STATUS_FILE_TOO_LARGE = 0xC0000904;
+        internal const uint NT_STATUS_INVALID_PARAMETER = 0xC000000D;
+
         // https://msdn.microsoft.com/en-us/library/bb432380.aspx
         // https://msdn.microsoft.com/en-us/library/windows/hardware/ff566424.aspx
         [DllImport(Libraries.NtDll, CharSet = CharSet.Unicode, ExactSpelling = true)]
-        private static extern unsafe int NtCreateFile(
+        private static extern unsafe uint NtCreateFile(
             out IntPtr FileHandle,
             DesiredAccess DesiredAccess,
             ref OBJECT_ATTRIBUTES ObjectAttributes,
             out IO_STATUS_BLOCK IoStatusBlock,
             long* AllocationSize,
-            System.IO.FileAttributes FileAttributes,
-            System.IO.FileShare ShareAccess,
+            FileAttributes FileAttributes,
+            FileShare ShareAccess,
             CreateDisposition CreateDisposition,
             CreateOptions CreateOptions,
             void* EaBuffer,
             uint EaLength);
 
-        internal static unsafe (int status, IntPtr handle) CreateFile(
+        internal static unsafe (uint status, IntPtr handle) CreateFile(
             ReadOnlySpan<char> path,
             IntPtr rootDirectory,
             CreateDisposition createDisposition,
             DesiredAccess desiredAccess = DesiredAccess.FILE_GENERIC_READ | DesiredAccess.SYNCHRONIZE,
-            System.IO.FileShare shareAccess = System.IO.FileShare.ReadWrite | System.IO.FileShare.Delete,
-            System.IO.FileAttributes fileAttributes = 0,
+            FileShare shareAccess = FileShare.ReadWrite | FileShare.Delete,
+            FileAttributes fileAttributes = 0,
             CreateOptions createOptions = CreateOptions.FILE_SYNCHRONOUS_IO_NONALERT,
             ObjectAttributes objectAttributes = ObjectAttributes.OBJ_CASE_INSENSITIVE,
             void* eaBuffer = null,
-            uint eaLength = 0)
+            uint eaLength = 0,
+            long* preallocationSize = null,
+            SECURITY_QUALITY_OF_SERVICE* securityQualityOfService = null)
         {
             fixed (char* c = &MemoryMarshal.GetReference(path))
             {
@@ -48,14 +56,15 @@ internal static unsafe (int status, IntPtr handle) CreateFile(
                 OBJECT_ATTRIBUTES attributes = new OBJECT_ATTRIBUTES(
                     &name,
                     objectAttributes,
-                    rootDirectory);
+                    rootDirectory,
+                    securityQualityOfService);
 
-                int status = NtCreateFile(
+                uint status = NtCreateFile(
                     out IntPtr handle,
                     desiredAccess,
                     ref attributes,
                     out IO_STATUS_BLOCK statusBlock,
-                    AllocationSize: null,
+                    AllocationSize: preallocationSize,
                     fileAttributes,
                     shareAccess,
                     createDisposition,
@@ -67,6 +76,122 @@ internal static unsafe (int status, IntPtr handle) CreateFile(
             }
         }
 
+        internal static unsafe (uint status, IntPtr handle) CreateFile(ReadOnlySpan<char> path, FileMode mode, FileAccess access, FileShare share, FileOptions options, long preallocationSize)
+        {
+            // For mitigating local elevation of privilege attack through named pipes
+            // make sure we always call NtCreateFile with SECURITY_ANONYMOUS so that the
+            // named pipe server can't impersonate a high privileged client security context
+            SECURITY_QUALITY_OF_SERVICE securityQualityOfService = new SECURITY_QUALITY_OF_SERVICE(
+                ImpersonationLevel.Anonymous, // SECURITY_ANONYMOUS
+                ContextTrackingMode.Static,
+                effectiveOnly: false);
+
+            return CreateFile(
+                path: path,
+                rootDirectory: IntPtr.Zero,
+                createDisposition: GetCreateDisposition(mode),
+                desiredAccess: GetDesiredAccess(access, mode, options),
+                shareAccess: GetShareAccess(share),
+                fileAttributes: GetFileAttributes(options),
+                createOptions: GetCreateOptions(options),
+                objectAttributes: GetObjectAttributes(share),
+                preallocationSize: &preallocationSize,
+                securityQualityOfService: &securityQualityOfService);
+        }
+
+        private static CreateDisposition GetCreateDisposition(FileMode mode)
+        {
+            switch (mode)
+            {
+                case FileMode.CreateNew:
+                    return CreateDisposition.FILE_CREATE;
+                case FileMode.Create:
+                    return CreateDisposition.FILE_SUPERSEDE;
+                case FileMode.OpenOrCreate:
+                case FileMode.Append: // has extra handling in GetDesiredAccess
+                    return CreateDisposition.FILE_OPEN_IF;
+                case FileMode.Truncate:
+                    return CreateDisposition.FILE_OVERWRITE;
+                default:
+                    Debug.Assert(mode == FileMode.Open); // the enum value is validated in FileStream ctor
+                    return CreateDisposition.FILE_OPEN;
+            }
+        }
+
+        private static DesiredAccess GetDesiredAccess(FileAccess access, FileMode fileMode, FileOptions options)
+        {
+            DesiredAccess result = 0;
+
+            if ((access & FileAccess.Read) != 0)
+            {
+                result |= DesiredAccess.FILE_GENERIC_READ;
+            }
+            if ((access & FileAccess.Write) != 0)
+            {
+                result |= DesiredAccess.FILE_GENERIC_WRITE;
+            }
+            if (fileMode == FileMode.Append)
+            {
+                result |= DesiredAccess.FILE_APPEND_DATA;
+            }
+            if ((options & FileOptions.Asynchronous) == 0)
+            {
+                result |= DesiredAccess.SYNCHRONIZE; // required by FILE_SYNCHRONOUS_IO_NONALERT
+            }
+            if ((options & FileOptions.DeleteOnClose) != 0 || fileMode == FileMode.Create)
+            {
+                result |= DesiredAccess.DELETE; // required by FILE_DELETE_ON_CLOSE and FILE_SUPERSEDE (which deletes a file if it exists)
+            }
+
+            return result;
+        }
+
+        private static FileShare GetShareAccess(FileShare share)
+            => share & ~FileShare.Inheritable; // FileShare.Inheritable is handled in GetObjectAttributes
+
+        private static FileAttributes GetFileAttributes(FileOptions options)
+            => (options & FileOptions.Encrypted) != 0 ? FileAttributes.Encrypted : 0;
+
+        // FileOptions.Encrypted is handled in GetFileAttributes
+        private static CreateOptions GetCreateOptions(FileOptions options)
+        {
+            // Every directory is just a directory FILE.
+            // FileStream does not allow for opening directories on purpose.
+            // FILE_NON_DIRECTORY_FILE is used to ensure that
+            CreateOptions result = CreateOptions.FILE_NON_DIRECTORY_FILE;
+
+            if ((options & FileOptions.WriteThrough) != 0)
+            {
+                result |= CreateOptions.FILE_WRITE_THROUGH;
+            }
+            if ((options & FileOptions.RandomAccess) != 0)
+            {
+                result |= CreateOptions.FILE_RANDOM_ACCESS;
+            }
+            if ((options & FileOptions.SequentialScan) != 0)
+            {
+                result |= CreateOptions.FILE_SEQUENTIAL_ONLY;
+            }
+            if ((options & FileOptions.DeleteOnClose) != 0)
+            {
+                result |= CreateOptions.FILE_DELETE_ON_CLOSE; // has extra handling in GetDesiredAccess
+            }
+            if ((options & FileOptions.Asynchronous) == 0)
+            {
+                // it's async by default, so we need to disable it when async was not requested
+                result |= CreateOptions.FILE_SYNCHRONOUS_IO_NONALERT; // has extra handling in GetDesiredAccess
+            }
+            if (((int)options & 0x20000000) != 0) // NoBuffering
+            {
+                result |= CreateOptions.FILE_NO_INTERMEDIATE_BUFFERING;
+            }
+
+            return result;
+        }
+
+        private static ObjectAttributes GetObjectAttributes(FileShare share)
+            => (share & FileShare.Inheritable) != 0 ? ObjectAttributes.OBJ_INHERIT : 0;
+
         /// <summary>
         /// File creation disposition when calling directly to NT APIs.
         /// </summary>

src/libraries/Common/src/Interop/Windows/NtDll/Interop.NtQueryInformationFile.cs

@@ -25,8 +25,6 @@ internal struct IO_STATUS_BLOCK
         }
 
         internal const uint FileModeInformation = 16;
-        internal const uint FILE_SYNCHRONOUS_IO_ALERT = 0x00000010;
-        internal const uint FILE_SYNCHRONOUS_IO_NONALERT = 0x00000020;
 
         internal const int STATUS_INVALID_HANDLE = unchecked((int)0xC0000008);
     }

src/libraries/Microsoft.IO.Redist/src/Microsoft.IO.Redist.csproj

@@ -136,6 +136,8 @@
              Link="Common\Interop\Windows\Interop.OBJECT_ATTRIBUTES.cs" />
     <Compile Include="$(CommonPath)Interop\Windows\Interop.UNICODE_STRING.cs"
              Link="Common\Interop\Windows\Interop.UNICODE_STRING.cs" />
+    <Compile Include="$(CommonPath)Interop\Windows\Interop.SECURITY_QUALITY_OF_SERVICE.cs"
+             Link="Common\Interop\Windows\Interop.SECURITY_QUALITY_OF_SERVICE.cs" />
     <Compile Include="$(CommonPath)Interop\Windows\Kernel32\Interop.CopyFile.cs"
              Link="Common\Interop\Windows\Interop.CopyFile.cs" />
     <Compile Include="$(CommonPath)Interop\Windows\Kernel32\Interop.CopyFileEx.cs"

src/libraries/Native/Unix/Common/pal_config.h.in

@@ -34,6 +34,8 @@
 #cmakedefine01 HAVE_STRLCAT
 #cmakedefine01 HAVE_SHM_OPEN_THAT_WORKS_WELL_ENOUGH_WITH_MMAP
 #cmakedefine01 HAVE_POSIX_ADVISE
+#cmakedefine01 HAVE_POSIX_FALLOCATE
+#cmakedefine01 HAVE_POSIX_FALLOCATE64
 #cmakedefine01 PRIORITY_REQUIRES_INT_WHO
 #cmakedefine01 KEVENT_REQUIRES_INT_PARAMS
 #cmakedefine01 HAVE_IOCTL

src/libraries/Native/Unix/System.Native/entrypoints.c

@@ -90,6 +90,7 @@ static const Entry s_sysNative[] =
     DllImportEntry(SystemNative_FTruncate)
     DllImportEntry(SystemNative_Poll)
     DllImportEntry(SystemNative_PosixFAdvise)
+    DllImportEntry(SystemNative_PosixFAllocate)
     DllImportEntry(SystemNative_Read)
     DllImportEntry(SystemNative_ReadLink)
     DllImportEntry(SystemNative_Rename)