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)
9 /* INCLUDES ******************************************************************/
15 /* GLOBALS *******************************************************************/
17 PERESOURCE FsRtlPagingIoResources
;
18 ULONG FsRtlPagingIoResourceSelector
;
20 static UCHAR LegalAnsiCharacterArray
[] =
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 */
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 */
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 */
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 */
152 PUCHAR FsRtlLegalAnsiCharacterArray
= LegalAnsiCharacterArray
;
154 /* PRIVATE FUNCTIONS *********************************************************/
158 FsRtlInitSystem(VOID
)
162 /* Initialize the list for granted locks */
163 ExInitializePagedLookasideList(&FsRtlFileLockLookasideList
,
171 /* Allocate the Resource Buffer */
172 FsRtlPagingIoResources
= FsRtlAllocatePoolWithTag(NonPagedPool
,
173 FSRTL_MAX_RESOURCES
*
177 /* Initialize the Resources */
178 for (i
= 0; i
< FSRTL_MAX_RESOURCES
; i
++)
180 ExInitializeResource(&FsRtlPagingIoResources
[i
]);
186 /* PUBLIC FUNCTIONS **********************************************************/
189 * @name FsRtlAllocateResource
190 * @implemented NT 4.0
192 * The FsRtlAllocateResource routine returns a pre-initialized ERESOURCE
193 * for use by a File System Driver.
195 * @return A Pointer to a pre-initialized ERESOURCE.
197 * @remarks The File System Library only provides up to 16 Resources.
202 FsRtlAllocateResource(VOID
)
206 /* Return a preallocated ERESOURCE */
207 return &FsRtlPagingIoResources
[FsRtlPagingIoResourceSelector
++ %
208 FSRTL_MAX_RESOURCES
];