ntoskrnl/fsrtl/fsrtlpc.c

   1 /*
   2  * PROJECT:         ReactOS Kernel
   3  * LICENSE:         GPL - See COPYING in the top level directory
   4  * FILE:            ntoskrnl/fsrtl/fsrtlpc.c
   5  * PURPOSE:         Contains initialization and support code for the FsRtl
   6  * PROGRAMMERS:     Alex Ionescu (alex.ionescu@reactos.org)
   7  */
   8
   9 /* INCLUDES ******************************************************************/
  10
  11 #include <ntoskrnl.h>
  12 #define NDEBUG
  13 #include <debug.h>
  14
  15 /* GLOBALS *******************************************************************/
  16
  17 PERESOURCE FsRtlPagingIoResources;
  18 ULONG FsRtlPagingIoResourceSelector;
  19
  20 static UCHAR LegalAnsiCharacterArray[] =
  21 {
  22   0,                                                        /* CTRL+@, 0x00 */
  23   0,                                                        /* CTRL+A, 0x01 */
  24   0,                                                        /* CTRL+B, 0x02 */
  25   0,                                                        /* CTRL+C, 0x03 */
  26   0,                                                        /* CTRL+D, 0x04 */
  27   0,                                                        /* CTRL+E, 0x05 */
  28   0,                                                        /* CTRL+F, 0x06 */
  29   0,                                                        /* CTRL+G, 0x07 */
  30   0,                                                        /* CTRL+H, 0x08 */
  31   0,                                                        /* CTRL+I, 0x09 */
  32   0,                                                        /* CTRL+J, 0x0a */
  33   0,                                                        /* CTRL+K, 0x0b */
  34   0,                                                        /* CTRL+L, 0x0c */
  35   0,                                                        /* CTRL+M, 0x0d */
  36   0,                                                        /* CTRL+N, 0x0e */
  37   0,                                                        /* CTRL+O, 0x0f */
  38   0,                                                        /* CTRL+P, 0x10 */
  39   0,                                                        /* CTRL+Q, 0x11 */
  40   0,                                                        /* CTRL+R, 0x12 */
  41   0,                                                        /* CTRL+S, 0x13 */
  42   0,                                                        /* CTRL+T, 0x14 */
  43   0,                                                        /* CTRL+U, 0x15 */
  44   0,                                                        /* CTRL+V, 0x16 */
  45   0,                                                        /* CTRL+W, 0x17 */
  46   0,                                                        /* CTRL+X, 0x18 */
  47   0,                                                        /* CTRL+Y, 0x19 */
  48   0,                                                        /* CTRL+Z, 0x1a */
  49   0,                                                        /* CTRL+[, 0x1b */
  50   0,                                                        /* CTRL+\, 0x1c */
  51   0,                                                        /* CTRL+], 0x1d */
  52   0,                                                        /* CTRL+^, 0x1e */
  53   0,                                                        /* CTRL+_, 0x1f */
  54   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* ` ',    0x20 */
  55   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `!',    0x21 */
  56   FSRTL_WILD_CHARACTER,                                     /* `"',    0x22 */
  57   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `#',    0x23 */
  58   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `$',    0x24 */
  59   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `%',    0x25 */
  60   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `&',    0x26 */
  61   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `'',    0x27 */
  62   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `(',    0x28 */
  63   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `)',    0x29 */
  64   FSRTL_WILD_CHARACTER,                                     /* `*',    0x2a */
  65   FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,                      /* `+',    0x2b */
  66   FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,                      /* `,',    0x2c */
  67   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `-',    0x2d */
  68   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `.',    0x2e */
  69   0,                                                        /* `/',    0x2f */
  70   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `0',    0x30 */
  71   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `1',    0x31 */
  72   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `2',    0x32 */
  73   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `3',    0x33 */
  74   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `4',    0x34 */
  75   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `5',    0x35 */
  76   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `6',    0x36 */
  77   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `7',    0x37 */
  78   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `8',    0x38 */
  79   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `9',    0x39 */
  80   FSRTL_NTFS_LEGAL,                                         /* `:',    0x3a */
  81   FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,                      /* `;',    0x3b */
  82   FSRTL_WILD_CHARACTER,                                     /* `<',    0x3c */
  83   FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,                      /* `=',    0x3d */
  84   FSRTL_WILD_CHARACTER,                                     /* `>',    0x3e */
  85   FSRTL_WILD_CHARACTER,                                     /* `?',    0x3f */
  86   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `@',    0x40 */
  87   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `A',    0x41 */
  88   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `B',    0x42 */
  89   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `C',    0x43 */
  90   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `D',    0x44 */
  91   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `E',    0x45 */
  92   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `F',    0x46 */
  93   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `G',    0x47 */
  94   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `H',    0x48 */
  95   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `I',    0x49 */
  96   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `J',    0x4a */
  97   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `K',    0x4b */
  98   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `L',    0x4c */
  99   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `M',    0x4d */
 100   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `N',    0x4e */
 101   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `O',    0x4f */
 102   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `P',    0x50 */
 103   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `Q',    0x51 */
 104   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `R',    0x52 */
 105   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `S',    0x53 */
 106   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `T',    0x54 */
 107   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `U',    0x55 */
 108   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `V',    0x56 */
 109   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `W',    0x57 */
 110   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `X',    0x58 */
 111   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `Y',    0x59 */
 112   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `Z',    0x5a */
 113   FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,                      /* `[',    0x5b */
 114   0,                                                        /* `\',    0x5c */
 115   FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,                      /* `]',    0x5d */
 116   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `^',    0x5e */
 117   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `_',    0x5f */
 118   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* ``',    0x60 */
 119   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `a',    0x61 */
 120   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `b',    0x62 */
 121   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `c',    0x63 */
 122   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `d',    0x64 */
 123   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `e',    0x65 */
 124   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `f',    0x66 */
 125   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `g',    0x67 */
 126   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `h',    0x68 */
 127   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `i',    0x69 */
 128   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `j',    0x6a */
 129   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `k',    0x6b */
 130   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `l',    0x6c */
 131   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `m',    0x6d */
 132   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `n',    0x6e */
 133   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `o',    0x6f */
 134   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `p',    0x70 */
 135   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `q',    0x71 */
 136   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `r',    0x72 */
 137   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `s',    0x73 */
 138   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `t',    0x74 */
 139   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `u',    0x75 */
 140   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `v',    0x76 */
 141   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `w',    0x77 */
 142   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `x',    0x78 */
 143   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `y',    0x79 */
 144   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `z',    0x7a */
 145   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `{',    0x7b */
 146   0,                                                        /* `|',    0x7c */
 147   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `}',    0x7d */
 148   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL,    /* `~',    0x7e */
 149   FSRTL_FAT_LEGAL | FSRTL_HPFS_LEGAL | FSRTL_NTFS_LEGAL     /*         0x7f */
 150 };
 151
 152 PUCHAR FsRtlLegalAnsiCharacterArray = LegalAnsiCharacterArray;
 153
 154 /* PRIVATE FUNCTIONS *********************************************************/
 155
 156 BOOLEAN
 157 NTAPI
 158 FsRtlInitSystem(VOID)
 159 {
 160     ULONG i;
 161
 162     /* Initialize the list for granted locks */
 163     ExInitializePagedLookasideList(&FsRtlFileLockLookasideList,
 164                                    NULL,
 165                                    NULL,
 166                                    0,
 167                                    sizeof(FILE_LOCK),
 168                                    IFS_POOL_TAG,
 169                                    0);
 170
 171     /* Allocate the Resource Buffer */
 172     FsRtlPagingIoResources = FsRtlAllocatePoolWithTag(NonPagedPool,
 173                                                       FSRTL_MAX_RESOURCES *
 174                                                       sizeof(ERESOURCE),
 175                                                       'eRsF');
 176
 177     /* Initialize the Resources */
 178     for (i = 0; i < FSRTL_MAX_RESOURCES; i++)
 179     {
 180         ExInitializeResource(&FsRtlPagingIoResources[i]);
 181     }
 182
 183     return TRUE;
 184 }
 185
 186 /* PUBLIC FUNCTIONS **********************************************************/
 187
 188 /*++
 189  * @name FsRtlAllocateResource
 190  * @implemented NT 4.0
 191  *
 192  *     The FsRtlAllocateResource routine returns a pre-initialized ERESOURCE
 193  *     for use by a File System Driver.
 194  *
 195  * @return A Pointer to a pre-initialized ERESOURCE.
 196  *
 197  * @remarks The File System Library only provides up to 16 Resources.
 198  *
 199  *--*/
 200 PERESOURCE
 201 NTAPI
 202 FsRtlAllocateResource(VOID)
 203 {
 204     PAGED_CODE();
 205
 206     /* Return a preallocated ERESOURCE */
 207     return &FsRtlPagingIoResources[FsRtlPagingIoResourceSelector++ %
 208                                    FSRTL_MAX_RESOURCES];
 209 }
 210