rostests/kmtests/ntos_io/IoMdl.c

   1 /*
   2  * PROJECT:         ReactOS kernel-mode tests
   3  * LICENSE:         LGPLv2+ - See COPYING.LIB in the top level directory
   4  * PURPOSE:         Kernel-Mode Test Suite Io Regressions KM-Test (Mdl)
   5  * PROGRAMMER:      Aleksey Bragin <aleksey@reactos.org>
   6  */
   7
   8 #include <kmt_test.h>
   9
  10 #define NDEBUG
  11 #include <debug.h>
  12
  13 START_TEST(IoMdl)
  14 {
  15     PMDL Mdl;
  16     PIRP Irp;
  17     PVOID VirtualAddress;
  18     ULONG MdlSize = 2*4096+184; // 2 pages and some random value
  19     ULONG TooLargeMdlSize = (0x10000 - sizeof(MDL)) / sizeof(ULONG_PTR) * PAGE_SIZE;
  20
  21     // Try to alloc 2Gb MDL
  22     Mdl = IoAllocateMdl(NULL, 2048UL*0x100000, FALSE, FALSE, NULL);
  23
  24     ok(Mdl == NULL,
  25       "IoAllocateMdl should fail allocation of 2Gb or more, but got Mdl=0x%X\n",
  26       (UINT_PTR)Mdl);
  27
  28     if (Mdl)
  29         IoFreeMdl(Mdl);
  30
  31     // Now create a valid MDL
  32     VirtualAddress = ExAllocatePool(NonPagedPool, MdlSize);
  33     Mdl = IoAllocateMdl(VirtualAddress, MdlSize, FALSE, FALSE, NULL);
  34     ok(Mdl != NULL, "Mdl allocation failed\n");
  35     // Check fields of the allocated struct
  36     ok(Mdl->Next == NULL, "Mdl->Next should be NULL, but is 0x%X\n",
  37         (UINT_PTR)Mdl->Next);
  38     ok(Mdl->ByteCount == MdlSize,
  39         "Mdl->ByteCount should be equal to MdlSize, but is 0x%X\n",
  40         (UINT_PTR)Mdl->ByteCount);
  41     // TODO: Check other fields of MDL struct
  42
  43     IoFreeMdl(Mdl);
  44
  45     // Test maximum size for an MDL
  46     Mdl = IoAllocateMdl(NULL, TooLargeMdlSize, FALSE, FALSE, NULL);
  47     ok(Mdl == NULL, "Mdl allocation for %lu bytes succeeded\n", TooLargeMdlSize);
  48     if (Mdl) IoFreeMdl(Mdl);
  49
  50     Mdl = IoAllocateMdl(NULL, TooLargeMdlSize - PAGE_SIZE + 1, FALSE, FALSE, NULL);
  51     ok(Mdl == NULL, "Mdl allocation for %lu bytes succeeded\n", TooLargeMdlSize - PAGE_SIZE + 1);
  52     if (Mdl) IoFreeMdl(Mdl);
  53
  54     Mdl = IoAllocateMdl(NULL, TooLargeMdlSize - PAGE_SIZE, FALSE, FALSE, NULL);
  55     ok(Mdl != NULL, "Mdl allocation for %lu bytes failed\n", TooLargeMdlSize - PAGE_SIZE);
  56     if (Mdl) IoFreeMdl(Mdl);
  57
  58     Mdl = IoAllocateMdl(NULL, TooLargeMdlSize / 2, FALSE, FALSE, NULL);
  59     ok(Mdl != NULL, "Mdl allocation for %lu bytes failed\n", TooLargeMdlSize / 2);
  60     if (Mdl) IoFreeMdl(Mdl);
  61
  62     // Allocate now with pointer to an Irp
  63     Irp = IoAllocateIrp(1, FALSE);
  64     ok(Irp != NULL, "IRP allocation failed\n");
  65     Mdl = IoAllocateMdl(VirtualAddress, MdlSize, FALSE, FALSE, Irp);
  66     ok(Mdl != NULL, "Mdl allocation failed\n");
  67     ok(Irp->MdlAddress == Mdl, "Irp->MdlAddress should be 0x%X, but is 0x%X\n",
  68         (UINT_PTR)Mdl, (UINT_PTR)Irp->MdlAddress);
  69
  70     IoFreeMdl(Mdl);
  71
  72     // TODO: Check a case when SecondaryBuffer == TRUE
  73
  74     IoFreeIrp(Irp);
  75     ExFreePool(VirtualAddress);
  76 }