| 1 | /* $Id: ntdircache.c 2851 2016-08-31 17:30:52Z bird $ */
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| 2 | /** @file
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| 3 | * ntdircache.c - NT directory content cache.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (c) 2016 knut st. osmundsen <bird-kBuild-spamx@anduin.net>
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| 8 | *
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| 9 | * Permission is hereby granted, free of charge, to any person obtaining a
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| 10 | * copy of this software and associated documentation files (the "Software"),
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| 11 | * to deal in the Software without restriction, including without limitation
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| 12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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| 13 | * and/or sell copies of the Software, and to permit persons to whom the
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| 14 | * Software is furnished to do so, subject to the following conditions:
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| 15 | *
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| 16 | * The above copyright notice and this permission notice shall be included
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| 17 | * in all copies or substantial portions of the Software.
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| 18 | *
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| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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| 20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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| 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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| 22 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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| 23 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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| 24 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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| 25 | * IN THE SOFTWARE.
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| 26 | *
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| 27 | * Alternatively, the content of this file may be used under the terms of the
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| 28 | * GPL version 2 or later, or LGPL version 2.1 or later.
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| 29 | */
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| 30 |
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| 31 |
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| 32 | /*********************************************************************************************************************************
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| 33 | * Header Files *
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| 34 | *********************************************************************************************************************************/
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| 35 | #include <k/kHlp.h>
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| 36 |
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| 37 | #include "nthlp.h"
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| 38 | #include "ntstat.h"
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| 39 |
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| 40 | #include <stdio.h>
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| 41 | //#include <intrin.h>
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| 42 | //#include <setjmp.h>
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| 43 | //#include <ctype.h>
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| 44 |
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| 45 |
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| 46 | //#include <Windows.h>
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| 47 | //#include <winternl.h>
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| 48 |
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| 49 |
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| 50 |
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| 51 | /*********************************************************************************************************************************
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| 52 | * Defined Constants And Macros *
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| 53 | *********************************************************************************************************************************/
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| 54 | /** @def KFSCACHE_CFG_UTF16
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| 55 | * Whether to compile in the UTF-16 names support. */
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| 56 | #define KFSCACHE_CFG_UTF16 1
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| 57 | /** @def KFSCACHE_CFG_SHORT_NAMES
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| 58 | * Whether to compile in the short name support. */
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| 59 | #define KFSCACHE_CFG_SHORT_NAMES 1
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| 60 | /** @def KFSCACHE_CFG_PATH_HASH_TAB_SIZE
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| 61 | * Size of the path hash table. */
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| 62 | #define KFSCACHE_CFG_PATH_HASH_TAB_SIZE 16381
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| 63 | /** The max length paths we consider. */
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| 64 | #define KFSCACHE_CFG_MAX_PATH 1024
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| 65 | /** The max ANSI name length. */
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| 66 | #define KFSCACHE_CFG_MAX_ANSI_NAME (256*3 + 16)
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| 67 | /** The max UTF-16 name length. */
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| 68 | #define KFSCACHE_CFG_MAX_UTF16_NAME (256*2 + 16)
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| 69 |
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| 70 |
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| 71 |
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| 72 | /** Special KFSOBJ::uCacheGen number indicating that it does not apply. */
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| 73 | #define KFSWOBJ_CACHE_GEN_IGNORE KU32_MAX
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| 74 |
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| 75 | /** @def KW_LOG
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| 76 | * Generic logging.
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| 77 | * @param a Argument list for kFsCacheDbgPrintf */
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| 78 | #ifndef NDEBUG
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| 79 | # define KFSCACHE_LOG(a) kFsCacheDbgPrintf a
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| 80 | #else
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| 81 | # define KFSCACHE_LOG(a) do { } while (0)
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| 82 | #endif
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| 83 |
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| 84 |
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| 85 | /** @name KFSOBJ_TYPE_XXX - KFSOBJ::bObjType
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| 86 | * @{ */
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| 87 | /** Directory, type KFSDIR. */
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| 88 | #define KFSOBJ_TYPE_DIR KU8_C(0x01)
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| 89 | /** Regular file - type KFSOBJ. */
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| 90 | #define KFSOBJ_TYPE_FILE KU8_C(0x02)
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| 91 | /** Other file - type KFSOBJ. */
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| 92 | #define KFSOBJ_TYPE_OTHER KU8_C(0x03)
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| 93 | /** Caching of a negative result - type KFSOBJ.
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| 94 | * @remarks We will allocate enough space for the largest cache node, so this
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| 95 | * can metamorph into any other object should it actually turn up. */
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| 96 | #define KFSOBJ_TYPE_MISSING KU8_C(0x04)
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| 97 | ///** Invalidated entry flag. */
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| 98 | //#define KFSOBJ_TYPE_F_INVALID KU8_C(0x20)
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| 99 | /** @} */
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| 100 |
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| 101 | /** @name KFSOBJ_F_XXX - KFSOBJ::fFlags
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| 102 | * @{ */
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| 103 | /** Whether the file system update the modified timestamp of directories
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| 104 | * when something is removed from it or added to it.
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| 105 | * @remarks They say NTFS is the only windows filesystem doing this. */
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| 106 | #define KFSOBJ_F_WORKING_DIR_MTIME KU32_C(0x00000001)
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| 107 | /** NTFS file system volume. */
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| 108 | #define KFSOBJ_F_NTFS KU32_C(0x80000000)
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| 109 | /** @} */
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| 110 |
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| 111 |
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| 112 | #define IS_ALPHA(ch) ( ((ch) >= 'A' && (ch) <= 'Z') || ((ch) >= 'a' && (ch) <= 'z') )
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| 113 | #define IS_SLASH(ch) ((ch) == '\\' || (ch) == '/')
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| 114 |
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| 115 |
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| 116 | /*********************************************************************************************************************************
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| 117 | * Structures and Typedefs *
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| 118 | *********************************************************************************************************************************/
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| 119 | /** Pointer to a core object. */
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| 120 | typedef struct KFSOBJ *PKFSOBJ;
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| 121 | /** Pointer to a directory object. */
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| 122 | typedef struct KFSDIR *PKFSDIR;
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| 123 | /** Pointer to a directory hash table entry. */
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| 124 | typedef struct KFSOBJHASH *PKFSOBJHASH;
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| 125 |
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| 126 |
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| 127 | /**
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| 128 | * Directory hash table entry.
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| 129 | *
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| 130 | * There can be two of these per directory entry when the short name differs
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| 131 | * from the long name.
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| 132 | */
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| 133 | typedef struct KFSOBJHASH
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| 134 | {
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| 135 | /** Pointer to the next entry with the same hash. */
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| 136 | PKFSOBJHASH pNext;
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| 137 | /** Pointer to the object. */
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| 138 | PKFSOBJ pObj;
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| 139 | } KFSOBJHASH;
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| 140 |
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| 141 |
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| 142 | /**
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| 143 | * Base cache node.
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| 144 | */
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| 145 | typedef struct KFSOBJ
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| 146 | {
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| 147 | /** Magic value (KFSOBJ_MAGIC). */
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| 148 | KU32 u32Magic;
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| 149 | /** Number of references. */
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| 150 | KU32 volatile cRefs;
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| 151 | /** The cache generation, see KFSWOBJ_CACHE_GEN_IGNORE. */
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| 152 | KU32 uCacheGen;
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| 153 | /** The object type, KFSOBJ_TYPE_XXX. */
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| 154 | KU8 bObjType;
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| 155 | /** Set if the Stats member is valid, clear if not. */
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| 156 | KBOOL fHaveStats;
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| 157 | /** Unused flags. */
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| 158 | KBOOL abUnused[2];
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| 159 | /** Flags, KFSOBJ_F_XXX. */
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| 160 | KU32 fFlags;
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| 161 |
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| 162 | /** Pointer to the parent (directory).
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| 163 | * This is only NULL for a root. */
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| 164 | PKFSDIR pParent;
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| 165 |
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| 166 | /** The directory name. (Allocated after the structure.) */
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| 167 | const char *pszName;
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| 168 | /** The length of pszName. */
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| 169 | KU16 cchName;
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| 170 | /** The length of the parent path (up to where pszName starts).
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| 171 | * @note This is valuable when constructing an absolute path to this node by
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| 172 | * means of the parent pointer (no need for recursion). */
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| 173 | KU16 cchParent;
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| 174 | #ifdef KFSCACHE_CFG_UTF16
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| 175 | /** The length of pwszName (in wchar_t's). */
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| 176 | KU16 cwcName;
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| 177 | /** The length of the parent UTF-16 path (in wchar_t's).
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| 178 | * @note This is valuable when constructing an absolute path to this node by
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| 179 | * means of the parent pointer (no need for recursion). */
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| 180 | KU16 cwcParent;
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| 181 | /** The UTF-16 object name. (Allocated after the structure.) */
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| 182 | const wchar_t *pwszName;
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| 183 | #endif
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| 184 |
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| 185 | #ifdef KFSCACHE_CFG_SHORT_NAMES
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| 186 | /** The short object name. (Allocated after the structure, could be same
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| 187 | * as pszName.) */
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| 188 | const char *pszShortName;
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| 189 | /** The length of pszShortName. */
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| 190 | KU16 cchShortName;
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| 191 | /** The length of the short parent path (up to where pszShortName starts). */
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| 192 | KU16 cchShortParent;
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| 193 | # ifdef KFSCACHE_CFG_UTF16
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| 194 | /** The length of pwszShortName (in wchar_t's). */
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| 195 | KU16 cwcShortName;
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| 196 | /** The length of the short parent UTF-16 path (in wchar_t's). */
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| 197 | KU16 cwcShortParent;
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| 198 | /** The UTF-16 short object name. (Allocated after the structure, possibly
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| 199 | * same as pwszName.) */
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| 200 | const wchar_t *pwszShortName;
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| 201 | # endif
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| 202 | #endif
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| 203 |
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| 204 | /** Stats - only valid when fHaveStats is set. */
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| 205 | BirdStat_T Stats;
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| 206 | } KFSOBJ;
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| 207 |
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| 208 | /** The magic for a KFSOBJ structure (Thelonious Sphere Monk). */
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| 209 | #define KFSOBJ_MAGIC KU32_C(0x19171010)
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| 210 |
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| 211 |
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| 212 | /**
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| 213 | * Directory node in the cache.
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| 214 | */
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| 215 | typedef struct KFSDIR
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| 216 | {
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| 217 | /** The core object information. */
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| 218 | KFSOBJ Obj;
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| 219 |
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| 220 | /** Child objects. */
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| 221 | PKFSOBJ *papChildren;
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| 222 | /** The number of child objects. */
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| 223 | KU32 cChildren;
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| 224 |
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| 225 | /** The size of the hash table.
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| 226 | * @remarks The hash table is optional and only used when there are a lot of
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| 227 | * entries in the directory. */
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| 228 | KU32 cHashTab;
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| 229 | /** Pointer to the hash table.
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| 230 | * @todo this isn't quite there yet, structure wise. sigh. */
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| 231 | PKFSOBJHASH paHashTab;
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| 232 |
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| 233 | /** Handle to the directory (we generally keep it open). */
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| 234 | HANDLE hDir;
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| 235 | /** The device number we queried/inherited when opening it. */
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| 236 | KU64 uDevNo;
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| 237 |
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| 238 | /** Set if populated. */
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| 239 | KBOOL fPopulated;
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| 240 | } KFSDIR;
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| 241 |
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| 242 |
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| 243 | /**
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| 244 | * Lookup errors.
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| 245 | */
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| 246 | typedef enum KFSLOOKUPERROR
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| 247 | {
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| 248 | /** Lookup was a success. */
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| 249 | KFSLOOKUPERROR_SUCCESS = 0,
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| 250 | /** A path component was not found. */
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| 251 | KFSLOOKUPERROR_PATH_COMP_NOT_FOUND,
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| 252 | /** A path component is not a directory. */
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| 253 | KFSLOOKUPERROR_PATH_COMP_NOT_DIR,
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| 254 | /** The final path entry is not a directory (trailing slash). */
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| 255 | KFSLOOKUPERROR_NOT_DIR,
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| 256 | /** Not found. */
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| 257 | KFSLOOKUPERROR_NOT_FOUND,
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| 258 | /** The path is too long. */
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| 259 | KFSLOOKUPERROR_PATH_TOO_LONG,
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| 260 | /** Unsupported path type. */
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| 261 | KFSLOOKUPERROR_UNSUPPORTED,
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| 262 | /** We're out of memory. */
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| 263 | KFSLOOKUPERROR_OUT_OF_MEMORY,
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| 264 |
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| 265 | /** Error opening directory. */
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| 266 | KFSLOOKUPERROR_DIR_OPEN_ERROR,
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| 267 | /** Error reading directory. */
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| 268 | KFSLOOKUPERROR_DIR_READ_ERROR,
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| 269 | /** UTF-16 to ANSI conversion error. */
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| 270 | KFSLOOKUPERROR_ANSI_CONVERSION_ERROR,
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| 271 | /** ANSI to UTF-16 conversion error. */
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| 272 | KFSLOOKUPERROR_UTF16_CONVERSION_ERROR,
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| 273 | /** Internal error. */
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| 274 | KFSLOOKUPERROR_INTERNAL_ERROR
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| 275 | } KFSLOOKUPERROR;
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| 276 |
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| 277 |
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| 278 | /** Pointer to an ANSI path hash table entry. */
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| 279 | typedef struct KFSHASHA *PKFSHASHA;
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| 280 | /**
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| 281 | * ANSI file system path hash table entry.
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| 282 | * The path hash table allows us to skip parsing and walking a path.
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| 283 | */
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| 284 | typedef struct KFSHASHA
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| 285 | {
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| 286 | /** Next entry with the same hash table slot. */
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| 287 | PKFSHASHA pNext;
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| 288 | /** Path hash value. */
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| 289 | KU32 uHashPath;
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| 290 | /** The path length. */
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| 291 | KU32 cchPath;
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| 292 | /** The cache generation ID. */
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| 293 | KU32 uCacheGen;
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| 294 | /** The lookup error (when pFsObj is NULL). */
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| 295 | KFSLOOKUPERROR enmError;
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| 296 | /** The path. (Allocated after the structure.) */
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| 297 | const char *pszPath;
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| 298 | /** Pointer to the matching FS object.
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| 299 | * This is NULL for negative path entries? */
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| 300 | PKFSOBJ pFsObj;
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| 301 | } KFSHASHA;
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| 302 |
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| 303 |
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| 304 | #ifdef KFSCACHE_CFG_UTF16
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| 305 | /** Pointer to an UTF-16 path hash table entry. */
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| 306 | typedef struct KFSHASHW *PKFSHASHW;
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| 307 | /**
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| 308 | * UTF-16 file system path hash table entry. The path hash table allows us
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| 309 | * to skip parsing and walking a path.
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| 310 | */
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| 311 | typedef struct KFSHASHW
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| 312 | {
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| 313 | /** Next entry with the same hash table slot. */
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| 314 | PKFSHASHW pNext;
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| 315 | /** Path hash value. */
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| 316 | KU32 uHashPath;
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| 317 | /** The path length (in wchar_t units). */
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| 318 | KU32 cwcPath;
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| 319 | /** The cache generation ID. */
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| 320 | KU32 uCacheGen;
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| 321 | /** The lookup error (when pFsObj is NULL). */
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| 322 | KFSLOOKUPERROR enmError;
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| 323 | /** The path. (Allocated after the structure.) */
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| 324 | const wchar_t *pwszPath;
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| 325 | /** Pointer to the matching FS object.
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| 326 | * This is NULL for negative path entries? */
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| 327 | PKFSOBJ pFsObj;
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| 328 | } KFSHASHW;
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| 329 | #endif
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| 330 |
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| 331 |
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| 332 | /** @name KFSCACHE_F_XXX
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| 333 | * @{ */
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| 334 | /** Whether to cache missing directory entries (KFSOBJ_TYPE_MISSING). */
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| 335 | #define KFSCACHE_F_MISSING_OBJECTS KU32_C(0x00000001)
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| 336 | /** Whether to cache missing paths. */
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| 337 | #define KFSCACHE_F_MISSING_PATHS KU32_C(0x00000002)
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| 338 | /** @} */
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| 339 |
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| 340 |
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| 341 | /** Pointer to a cache. */
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| 342 | typedef struct KFSCACHE *PKFSCACHE;
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| 343 | /**
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| 344 | * Directory cache instance.
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| 345 | */
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| 346 | typedef struct KFSCACHE
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| 347 | {
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| 348 | /** Magic value (KFSCACHE_MAGIC). */
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| 349 | KU32 u32Magic;
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| 350 | /** Cache flags. */
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| 351 | KU32 fFlags;
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| 352 |
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| 353 | /** The current cache generation for objects that already exists. */
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| 354 | KU32 uGeneration;
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| 355 | /** The current cache generation for missing objects, negative results, ++. */
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| 356 | KU32 uGenerationMissing;
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| 357 |
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| 358 | /** Number of cache objects. */
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| 359 | KSIZE cObjects;
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| 360 | /** Memory occupied by the cache object structures. */
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| 361 | KSIZE cbObjects;
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| 362 | /** Number of lookups. */
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| 363 | KSIZE cLookups;
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| 364 | /** Number of hits in the path hash tables. */
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| 365 | KSIZE cPathHashHits;
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| 366 | /** Number of hits walking the file system hierarchy. */
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| 367 | KSIZE cWalkHits;
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| 368 |
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| 369 | /** The root directory. */
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| 370 | KFSDIR RootDir;
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| 371 |
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| 372 | /** File system hash table for ANSI filename strings. */
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| 373 | PKFSHASHA apAnsiPaths[KFSCACHE_CFG_PATH_HASH_TAB_SIZE];
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| 374 | /** Number of paths in the apAnsiPaths hash table. */
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| 375 | KSIZE cAnsiPaths;
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| 376 | /** Number of collisions in the apAnsiPaths hash table. */
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| 377 | KSIZE cAnsiPathCollisions;
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| 378 | /** Amount of memory used by the path entries. */
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| 379 | KSIZE cbAnsiPaths;
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| 380 |
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| 381 | #ifdef KFSCACHE_CFG_UTF16
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| 382 | /** Number of paths in the apUtf16Paths hash table. */
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| 383 | KSIZE cUtf16Paths;
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| 384 | /** Number of collisions in the apUtf16Paths hash table. */
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| 385 | KSIZE cUtf16PathCollisions;
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| 386 | /** Amount of memory used by the UTF-16 path entries. */
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| 387 | KSIZE cbUtf16Paths;
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| 388 | /** File system hash table for UTF-16 filename strings. */
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| 389 | PKFSHASHW apUtf16Paths[KFSCACHE_CFG_PATH_HASH_TAB_SIZE];
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| 390 | #endif
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| 391 | } KFSCACHE;
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| 392 |
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| 393 | /** Magic value for KFSCACHE::u32Magic (Jon Batiste). */
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| 394 | #define KFSCACHE_MAGIC KU32_C(0x19861111)
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| 395 |
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| 396 |
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| 397 | /*********************************************************************************************************************************
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| 398 | * Internal Functions *
|
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| 399 | *********************************************************************************************************************************/
|
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| 400 | KU32 kFsCacheObjRelease(PKFSCACHE pCache, PKFSOBJ pObj);
|
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| 401 |
|
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| 402 |
|
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| 403 | /**
|
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| 404 | * Retains a reference to a cache object, internal version.
|
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| 405 | *
|
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| 406 | * @returns pObj
|
|---|
| 407 | * @param pObj The object.
|
|---|
| 408 | */
|
|---|
| 409 | K_INLINE PKFSOBJ kFsCacheObjRetainInternal(PKFSOBJ pObj)
|
|---|
| 410 | {
|
|---|
| 411 | KU32 cRefs = ++pObj->cRefs;
|
|---|
| 412 | kHlpAssert(cRefs < 16384);
|
|---|
| 413 | K_NOREF(cRefs);
|
|---|
| 414 | return pObj;
|
|---|
| 415 | }
|
|---|
| 416 |
|
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| 417 |
|
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| 418 | #ifndef NDEBUG
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| 419 |
|
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| 420 | /**
|
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| 421 | * Debug printing.
|
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| 422 | * @param pszFormat Debug format string.
|
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| 423 | * @param ... Format argument.
|
|---|
| 424 | */
|
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| 425 | static void kFsCacheDbgPrintfV(const char *pszFormat, va_list va)
|
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| 426 | {
|
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| 427 | if (1)
|
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| 428 | {
|
|---|
| 429 | DWORD const dwSavedErr = GetLastError();
|
|---|
| 430 |
|
|---|
| 431 | fprintf(stderr, "debug: ");
|
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| 432 | vfprintf(stderr, pszFormat, va);
|
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| 433 |
|
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| 434 | SetLastError(dwSavedErr);
|
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| 435 | }
|
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| 436 | }
|
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| 437 |
|
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| 438 |
|
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| 439 | /**
|
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| 440 | * Debug printing.
|
|---|
| 441 | * @param pszFormat Debug format string.
|
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| 442 | * @param ... Format argument.
|
|---|
| 443 | */
|
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| 444 | static void kFsCacheDbgPrintf(const char *pszFormat, ...)
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| 445 | {
|
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| 446 | if (1)
|
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| 447 | {
|
|---|
| 448 | va_list va;
|
|---|
| 449 | va_start(va, pszFormat);
|
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| 450 | kFsCacheDbgPrintfV(pszFormat, va);
|
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| 451 | va_end(va);
|
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| 452 | }
|
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| 453 | }
|
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| 454 |
|
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| 455 | #endif /* !NDEBUG */
|
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| 456 |
|
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| 457 |
|
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| 458 |
|
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| 459 | /**
|
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| 460 | * Hashes a string.
|
|---|
| 461 | *
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| 462 | * @returns 32-bit string hash.
|
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| 463 | * @param pszString String to hash.
|
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| 464 | */
|
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| 465 | static KU32 kFsCacheStrHash(const char *pszString)
|
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| 466 | {
|
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| 467 | /* This algorithm was created for sdbm (a public-domain reimplementation of
|
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| 468 | ndbm) database library. it was found to do well in scrambling bits,
|
|---|
| 469 | causing better distribution of the keys and fewer splits. it also happens
|
|---|
| 470 | to be a good general hashing function with good distribution. the actual
|
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| 471 | function is hash(i) = hash(i - 1) * 65599 + str[i]; what is included below
|
|---|
| 472 | is the faster version used in gawk. [there is even a faster, duff-device
|
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| 473 | version] the magic constant 65599 was picked out of thin air while
|
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| 474 | experimenting with different constants, and turns out to be a prime.
|
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| 475 | this is one of the algorithms used in berkeley db (see sleepycat) and
|
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| 476 | elsewhere. */
|
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| 477 | KU32 uHash = 0;
|
|---|
| 478 | KU32 uChar;
|
|---|
| 479 | while ((uChar = (unsigned char)*pszString++) != 0)
|
|---|
| 480 | uHash = uChar + (uHash << 6) + (uHash << 16) - uHash;
|
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| 481 | return uHash;
|
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| 482 | }
|
|---|
| 483 |
|
|---|
| 484 |
|
|---|
| 485 | /**
|
|---|
| 486 | * Hashes a string.
|
|---|
| 487 | *
|
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| 488 | * @returns The string length.
|
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| 489 | * @param pszString String to hash.
|
|---|
| 490 | * @param puHash Where to return the 32-bit string hash.
|
|---|
| 491 | */
|
|---|
| 492 | static KSIZE kFsCacheStrHashEx(const char *pszString, KU32 *puHash)
|
|---|
| 493 | {
|
|---|
| 494 | const char * const pszStart = pszString;
|
|---|
| 495 | KU32 uHash = 0;
|
|---|
| 496 | KU32 uChar;
|
|---|
| 497 | while ((uChar = (unsigned char)*pszString) != 0)
|
|---|
| 498 | {
|
|---|
| 499 | uHash = uChar + (uHash << 6) + (uHash << 16) - uHash;
|
|---|
| 500 | pszString++;
|
|---|
| 501 | }
|
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| 502 | *puHash = uHash;
|
|---|
| 503 | return pszString - pszStart;
|
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| 504 | }
|
|---|
| 505 |
|
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| 506 |
|
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| 507 | /**
|
|---|
| 508 | * Hashes a string.
|
|---|
| 509 | *
|
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| 510 | * @returns The string length in wchar_t units.
|
|---|
| 511 | * @param pwszString String to hash.
|
|---|
| 512 | * @param puHash Where to return the 32-bit string hash.
|
|---|
| 513 | */
|
|---|
| 514 | static KSIZE kFsCacheUtf16HashEx(const wchar_t *pwszString, KU32 *puHash)
|
|---|
| 515 | {
|
|---|
| 516 | const wchar_t * const pwszStart = pwszString;
|
|---|
| 517 | KU32 uHash = 0;
|
|---|
| 518 | KU32 uChar;
|
|---|
| 519 | while ((uChar = *pwszString) != 0)
|
|---|
| 520 | {
|
|---|
| 521 | uHash = uChar + (uHash << 6) + (uHash << 16) - uHash;
|
|---|
| 522 | pwszString++;
|
|---|
| 523 | }
|
|---|
| 524 | *puHash = uHash;
|
|---|
| 525 | return pwszString - pwszStart;
|
|---|
| 526 | }
|
|---|
| 527 |
|
|---|
| 528 | #if 0
|
|---|
| 529 |
|
|---|
| 530 | /**
|
|---|
| 531 | * Converts the given string to unicode.
|
|---|
| 532 | *
|
|---|
| 533 | * @returns Length of the resulting string in wchar_t's.
|
|---|
| 534 | * @param pszSrc The source string.
|
|---|
| 535 | * @param pwszDst The destination buffer.
|
|---|
| 536 | * @param cwcDst The size of the destination buffer in wchar_t's.
|
|---|
| 537 | */
|
|---|
| 538 | static KSIZE kwStrToUtf16(const char *pszSrc, wchar_t *pwszDst, KSIZE cwcDst)
|
|---|
| 539 | {
|
|---|
| 540 | /* Just to the quick ASCII stuff for now. correct ansi code page stuff later some time. */
|
|---|
| 541 | KSIZE offDst = 0;
|
|---|
| 542 | while (offDst < cwcDst)
|
|---|
| 543 | {
|
|---|
| 544 | char ch = *pszSrc++;
|
|---|
| 545 | pwszDst[offDst++] = ch;
|
|---|
| 546 | if (!ch)
|
|---|
| 547 | return offDst - 1;
|
|---|
| 548 | kHlpAssert((unsigned)ch < 127);
|
|---|
| 549 | }
|
|---|
| 550 |
|
|---|
| 551 | pwszDst[offDst - 1] = '\0';
|
|---|
| 552 | return offDst;
|
|---|
| 553 | }
|
|---|
| 554 |
|
|---|
| 555 |
|
|---|
| 556 | /**
|
|---|
| 557 | * Converts the given UTF-16 to a normal string.
|
|---|
| 558 | *
|
|---|
| 559 | * @returns Length of the resulting string.
|
|---|
| 560 | * @param pwszSrc The source UTF-16 string.
|
|---|
| 561 | * @param pszDst The destination buffer.
|
|---|
| 562 | * @param cbDst The size of the destination buffer in bytes.
|
|---|
| 563 | */
|
|---|
| 564 | static KSIZE kwUtf16ToStr(const wchar_t *pwszSrc, char *pszDst, KSIZE cbDst)
|
|---|
| 565 | {
|
|---|
| 566 | /* Just to the quick ASCII stuff for now. correct ansi code page stuff later some time. */
|
|---|
| 567 | KSIZE offDst = 0;
|
|---|
| 568 | while (offDst < cbDst)
|
|---|
| 569 | {
|
|---|
| 570 | wchar_t wc = *pwszSrc++;
|
|---|
| 571 | pszDst[offDst++] = (char)wc;
|
|---|
| 572 | if (!wc)
|
|---|
| 573 | return offDst - 1;
|
|---|
| 574 | kHlpAssert((unsigned)wc < 127);
|
|---|
| 575 | }
|
|---|
| 576 |
|
|---|
| 577 | pszDst[offDst - 1] = '\0';
|
|---|
| 578 | return offDst;
|
|---|
| 579 | }
|
|---|
| 580 |
|
|---|
| 581 |
|
|---|
| 582 |
|
|---|
| 583 | /** UTF-16 string length. */
|
|---|
| 584 | static KSIZE kwUtf16Len(wchar_t const *pwsz)
|
|---|
| 585 | {
|
|---|
| 586 | KSIZE cwc = 0;
|
|---|
| 587 | while (*pwsz != '\0')
|
|---|
| 588 | cwc++, pwsz++;
|
|---|
| 589 | return cwc;
|
|---|
| 590 | }
|
|---|
| 591 |
|
|---|
| 592 | /**
|
|---|
| 593 | * Copy out the UTF-16 string following the convension of GetModuleFileName
|
|---|
| 594 | */
|
|---|
| 595 | static DWORD kwUtf16CopyStyle1(wchar_t const *pwszSrc, wchar_t *pwszDst, KSIZE cwcDst)
|
|---|
| 596 | {
|
|---|
| 597 | KSIZE cwcSrc = kwUtf16Len(pwszSrc);
|
|---|
| 598 | if (cwcSrc + 1 <= cwcDst)
|
|---|
| 599 | {
|
|---|
| 600 | kHlpMemCopy(pwszDst, pwszSrc, (cwcSrc + 1) * sizeof(wchar_t));
|
|---|
| 601 | return (DWORD)cwcSrc;
|
|---|
| 602 | }
|
|---|
| 603 | if (cwcDst > 0)
|
|---|
| 604 | {
|
|---|
| 605 | KSIZE cwcDstTmp = cwcDst - 1;
|
|---|
| 606 | pwszDst[cwcDstTmp] = '\0';
|
|---|
| 607 | if (cwcDstTmp > 0)
|
|---|
| 608 | kHlpMemCopy(pwszDst, pwszSrc, cwcDstTmp);
|
|---|
| 609 | }
|
|---|
| 610 | SetLastError(ERROR_INSUFFICIENT_BUFFER);
|
|---|
| 611 | return (DWORD)cwcDst;
|
|---|
| 612 | }
|
|---|
| 613 |
|
|---|
| 614 |
|
|---|
| 615 | /**
|
|---|
| 616 | * Copy out the ANSI string following the convension of GetModuleFileName
|
|---|
| 617 | */
|
|---|
| 618 | static DWORD kwStrCopyStyle1(char const *pszSrc, char *pszDst, KSIZE cbDst)
|
|---|
| 619 | {
|
|---|
| 620 | KSIZE cchSrc = kHlpStrLen(pszSrc);
|
|---|
| 621 | if (cchSrc + 1 <= cbDst)
|
|---|
| 622 | {
|
|---|
| 623 | kHlpMemCopy(pszDst, pszSrc, cchSrc + 1);
|
|---|
| 624 | return (DWORD)cchSrc;
|
|---|
| 625 | }
|
|---|
| 626 | if (cbDst > 0)
|
|---|
| 627 | {
|
|---|
| 628 | KSIZE cbDstTmp = cbDst - 1;
|
|---|
| 629 | pszDst[cbDstTmp] = '\0';
|
|---|
| 630 | if (cbDstTmp > 0)
|
|---|
| 631 | kHlpMemCopy(pszDst, pszSrc, cbDstTmp);
|
|---|
| 632 | }
|
|---|
| 633 | SetLastError(ERROR_INSUFFICIENT_BUFFER);
|
|---|
| 634 | return (DWORD)cbDst;
|
|---|
| 635 | }
|
|---|
| 636 |
|
|---|
| 637 |
|
|---|
| 638 | /**
|
|---|
| 639 | * Normalizes the path so we get a consistent hash.
|
|---|
| 640 | *
|
|---|
| 641 | * @returns status code.
|
|---|
| 642 | * @param pszPath The path.
|
|---|
| 643 | * @param pszNormPath The output buffer.
|
|---|
| 644 | * @param cbNormPath The size of the output buffer.
|
|---|
| 645 | */
|
|---|
| 646 | static int kwPathNormalize(const char *pszPath, char *pszNormPath, KSIZE cbNormPath)
|
|---|
| 647 | {
|
|---|
| 648 | char *pchSlash;
|
|---|
| 649 | KSIZE cchNormPath;
|
|---|
| 650 |
|
|---|
| 651 | /*
|
|---|
| 652 | * We hash these to speed stuff up (nt_fullpath isn't cheap and we're
|
|---|
| 653 | * gonna have many repeat queries and assume nobody do case changes to
|
|---|
| 654 | * anything essential while kmk is running).
|
|---|
| 655 | */
|
|---|
| 656 | KU32 uHashPath;
|
|---|
| 657 | KU32 cchPath = (KU32)kFsCacheStrHashEx(pszPath, &uHashPath);
|
|---|
| 658 | KU32 const idxHashTab = uHashPath % K_ELEMENTS(g_apFsNormalizedPathsA);
|
|---|
| 659 | PKFSNORMHASHA pHashEntry = g_apFsNormalizedPathsA[idxHashTab];
|
|---|
| 660 | if (pHashEntry)
|
|---|
| 661 | {
|
|---|
| 662 | do
|
|---|
| 663 | {
|
|---|
| 664 | if ( pHashEntry->uHashPath == uHashPath
|
|---|
| 665 | && pHashEntry->cchPath == cchPath
|
|---|
| 666 | && kHlpMemComp(pHashEntry->pszPath, pszPath, cchPath) == 0)
|
|---|
| 667 | {
|
|---|
| 668 | if (cbNormPath > pHashEntry->cchNormPath)
|
|---|
| 669 | {
|
|---|
| 670 | KFSCACHE_LOG(("kwPathNormalize(%s) - hit\n", pszPath));
|
|---|
| 671 | kHlpMemCopy(pszNormPath, pHashEntry->szNormPath, pHashEntry->cchNormPath + 1);
|
|---|
| 672 | return 0;
|
|---|
| 673 | }
|
|---|
| 674 | return KERR_BUFFER_OVERFLOW;
|
|---|
| 675 | }
|
|---|
| 676 | pHashEntry = pHashEntry->pNext;
|
|---|
| 677 | } while (pHashEntry);
|
|---|
| 678 | }
|
|---|
| 679 |
|
|---|
| 680 | /*
|
|---|
| 681 | * Do it the slow way.
|
|---|
| 682 | */
|
|---|
| 683 | nt_fullpath(pszPath, pszNormPath, cbNormPath);
|
|---|
| 684 | /** @todo nt_fullpath overflow handling?!?!? */
|
|---|
| 685 |
|
|---|
| 686 | pchSlash = kHlpStrChr(pszNormPath, '/');
|
|---|
| 687 | while (pchSlash)
|
|---|
| 688 | {
|
|---|
| 689 | *pchSlash = '\\';
|
|---|
| 690 | pchSlash = kHlpStrChr(pchSlash + 1, '/');
|
|---|
| 691 | }
|
|---|
| 692 |
|
|---|
| 693 | /*
|
|---|
| 694 | * Create a new hash table entry (ignore failures).
|
|---|
| 695 | */
|
|---|
| 696 | cchNormPath = kHlpStrLen(pszNormPath);
|
|---|
| 697 | if (cchNormPath < KU16_MAX && cchPath < KU16_MAX)
|
|---|
| 698 | {
|
|---|
| 699 | pHashEntry = (PKFSNORMHASHA)kHlpAlloc(sizeof(*pHashEntry) + cchNormPath + 1 + cchPath + 1);
|
|---|
| 700 | if (pHashEntry)
|
|---|
| 701 | {
|
|---|
| 702 | pHashEntry->cchNormPath = (KU16)cchNormPath;
|
|---|
| 703 | pHashEntry->cchPath = (KU16)cchPath;
|
|---|
| 704 | pHashEntry->uHashPath = uHashPath;
|
|---|
| 705 | pHashEntry->pszPath = (char *)kHlpMemCopy(&pHashEntry->szNormPath[cchNormPath + 1], pszPath, cchPath + 1);
|
|---|
| 706 | kHlpMemCopy(pHashEntry->szNormPath, pszNormPath, cchNormPath + 1);
|
|---|
| 707 |
|
|---|
| 708 | pHashEntry->pNext = g_apFsNormalizedPathsA[idxHashTab];
|
|---|
| 709 | g_apFsNormalizedPathsA[idxHashTab] = pHashEntry;
|
|---|
| 710 | }
|
|---|
| 711 | }
|
|---|
| 712 |
|
|---|
| 713 | return 0;
|
|---|
| 714 | }
|
|---|
| 715 |
|
|---|
| 716 |
|
|---|
| 717 | /**
|
|---|
| 718 | * Get the pointer to the filename part of the path.
|
|---|
| 719 | *
|
|---|
| 720 | * @returns Pointer to where the filename starts within the string pointed to by pszFilename.
|
|---|
| 721 | * @returns Pointer to the terminator char if no filename.
|
|---|
| 722 | * @param pszPath The path to parse.
|
|---|
| 723 | */
|
|---|
| 724 | static wchar_t *kwPathGetFilenameW(const wchar_t *pwszPath)
|
|---|
| 725 | {
|
|---|
| 726 | const wchar_t *pwszLast = NULL;
|
|---|
| 727 | for (;;)
|
|---|
| 728 | {
|
|---|
| 729 | wchar_t wc = *pwszPath;
|
|---|
| 730 | #if K_OS == K_OS_OS2 || K_OS == K_OS_WINDOWS
|
|---|
| 731 | if (wc == '/' || wc == '\\' || wc == ':')
|
|---|
| 732 | {
|
|---|
| 733 | while ((wc = *++pwszPath) == '/' || wc == '\\' || wc == ':')
|
|---|
| 734 | /* nothing */;
|
|---|
| 735 | pwszLast = pwszPath;
|
|---|
| 736 | }
|
|---|
| 737 | #else
|
|---|
| 738 | if (wc == '/')
|
|---|
| 739 | {
|
|---|
| 740 | while ((wc = *++pszFilename) == '/')
|
|---|
| 741 | /* betsuni */;
|
|---|
| 742 | pwszLast = pwszPath;
|
|---|
| 743 | }
|
|---|
| 744 | #endif
|
|---|
| 745 | if (!wc)
|
|---|
| 746 | return (wchar_t *)(pwszLast ? pwszLast : pwszPath);
|
|---|
| 747 | pwszPath++;
|
|---|
| 748 | }
|
|---|
| 749 | }
|
|---|
| 750 |
|
|---|
| 751 |
|
|---|
| 752 | /**
|
|---|
| 753 | * Check if the path leads to a regular file (that exists).
|
|---|
| 754 | *
|
|---|
| 755 | * @returns K_TRUE / K_FALSE
|
|---|
| 756 | * @param pszPath Path to the file to check out.
|
|---|
| 757 | */
|
|---|
| 758 | static KBOOL kwLdrModuleIsRegularFile(const char *pszPath)
|
|---|
| 759 | {
|
|---|
| 760 | /* For stuff with .DLL extensions, we can use the GetFileAttribute cache to speed this up! */
|
|---|
| 761 | KSIZE cchPath = kHlpStrLen(pszPath);
|
|---|
| 762 | if ( cchPath > 3
|
|---|
| 763 | && pszPath[cchPath - 4] == '.'
|
|---|
| 764 | && (pszPath[cchPath - 3] == 'd' || pszPath[cchPath - 3] == 'D')
|
|---|
| 765 | && (pszPath[cchPath - 2] == 'l' || pszPath[cchPath - 2] == 'L')
|
|---|
| 766 | && (pszPath[cchPath - 1] == 'l' || pszPath[cchPath - 1] == 'L') )
|
|---|
| 767 | {
|
|---|
| 768 | PKFSOBJ pFsObj = kFsCacheLookupA(pszPath);
|
|---|
| 769 | if (pFsObj)
|
|---|
| 770 | {
|
|---|
| 771 | if (!(pFsObj->fAttribs & (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_DEVICE))) /* also checks invalid */
|
|---|
| 772 | return K_TRUE;
|
|---|
| 773 | }
|
|---|
| 774 | }
|
|---|
| 775 | else
|
|---|
| 776 | {
|
|---|
| 777 | BirdStat_T Stat;
|
|---|
| 778 | int rc = birdStatFollowLink(pszPath, &Stat);
|
|---|
| 779 | if (rc == 0)
|
|---|
| 780 | {
|
|---|
| 781 | if (S_ISREG(Stat.st_mode))
|
|---|
| 782 | return K_TRUE;
|
|---|
| 783 | }
|
|---|
| 784 | }
|
|---|
| 785 | return K_FALSE;
|
|---|
| 786 | }
|
|---|
| 787 |
|
|---|
| 788 |
|
|---|
| 789 |
|
|---|
| 790 |
|
|---|
| 791 |
|
|---|
| 792 |
|
|---|
| 793 | /**
|
|---|
| 794 | * Helper for getting the extension of a UTF-16 path.
|
|---|
| 795 | *
|
|---|
| 796 | * @returns Pointer to the extension or the terminator.
|
|---|
| 797 | * @param pwszPath The path.
|
|---|
| 798 | * @param pcwcExt Where to return the length of the extension.
|
|---|
| 799 | */
|
|---|
| 800 | static wchar_t const *kwFsPathGetExtW(wchar_t const *pwszPath, KSIZE *pcwcExt)
|
|---|
| 801 | {
|
|---|
| 802 | wchar_t const *pwszName = pwszPath;
|
|---|
| 803 | wchar_t const *pwszExt = NULL;
|
|---|
| 804 | for (;;)
|
|---|
| 805 | {
|
|---|
| 806 | wchar_t const wc = *pwszPath++;
|
|---|
| 807 | if (wc == '.')
|
|---|
| 808 | pwszExt = pwszPath;
|
|---|
| 809 | else if (wc == '/' || wc == '\\' || wc == ':')
|
|---|
| 810 | {
|
|---|
| 811 | pwszName = pwszPath;
|
|---|
| 812 | pwszExt = NULL;
|
|---|
| 813 | }
|
|---|
| 814 | else if (wc == '\0')
|
|---|
| 815 | {
|
|---|
| 816 | if (pwszExt)
|
|---|
| 817 | {
|
|---|
| 818 | *pcwcExt = pwszPath - pwszExt - 1;
|
|---|
| 819 | return pwszExt;
|
|---|
| 820 | }
|
|---|
| 821 | *pcwcExt = 0;
|
|---|
| 822 | return pwszPath - 1;
|
|---|
| 823 | }
|
|---|
| 824 | }
|
|---|
| 825 | }
|
|---|
| 826 | #endif
|
|---|
| 827 |
|
|---|
| 828 |
|
|---|
| 829 | /**
|
|---|
| 830 | * Looks for '..' in the path.
|
|---|
| 831 | *
|
|---|
| 832 | * @returns K_TRUE if '..' component found, K_FALSE if not.
|
|---|
| 833 | * @param pszPath The path.
|
|---|
| 834 | * @param cchPath The length of the path.
|
|---|
| 835 | */
|
|---|
| 836 | static KBOOL kFsCacheHasDotDot(const char *pszPath, KSIZE cchPath)
|
|---|
| 837 | {
|
|---|
| 838 | const char *pchDot = (const char *)kHlpMemChr(pszPath, '.', cchPath);
|
|---|
| 839 | while (pchDot)
|
|---|
| 840 | {
|
|---|
| 841 | if (pchDot[1] != '.')
|
|---|
| 842 | pchDot = (const char *)kHlpMemChr(pchDot + 1, '.', &pszPath[cchPath] - pchDot - 1);
|
|---|
| 843 | else
|
|---|
| 844 | {
|
|---|
| 845 | char ch;
|
|---|
| 846 | if ( (ch = pchDot[2]) == '\0'
|
|---|
| 847 | && IS_SLASH(ch))
|
|---|
| 848 | {
|
|---|
| 849 | if (pchDot == pszPath)
|
|---|
| 850 | return K_TRUE;
|
|---|
| 851 | ch = pchDot[-1];
|
|---|
| 852 | if ( IS_SLASH(ch)
|
|---|
| 853 | || ch == ':')
|
|---|
| 854 | return K_TRUE;
|
|---|
| 855 | }
|
|---|
| 856 | pchDot = (const char *)kHlpMemChr(pchDot + 2, '.', &pszPath[cchPath] - pchDot - 2);
|
|---|
| 857 | }
|
|---|
| 858 | }
|
|---|
| 859 |
|
|---|
| 860 | return K_FALSE;
|
|---|
| 861 | }
|
|---|
| 862 |
|
|---|
| 863 |
|
|---|
| 864 | /**
|
|---|
| 865 | * Creates an ANSI hash table entry for the given path.
|
|---|
| 866 | *
|
|---|
| 867 | * @returns The hash table entry or NULL if out of memory.
|
|---|
| 868 | * @param pCache The hash
|
|---|
| 869 | * @param pFsObj The resulting object.
|
|---|
| 870 | * @param pszPath The path.
|
|---|
| 871 | * @param cchPath The length of the path.
|
|---|
| 872 | * @param uHashPath The hash of the path.
|
|---|
| 873 | * @param idxHashTab The hash table index of the path.
|
|---|
| 874 | * @param enmError The lookup error.
|
|---|
| 875 | */
|
|---|
| 876 | static PKFSHASHA kFsCacheCreatePathHashTabEntryA(PKFSCACHE pCache, PKFSOBJ pFsObj, const char *pszPath, KU32 cchPath,
|
|---|
| 877 | KU32 uHashPath, KU32 idxHashTab, KFSLOOKUPERROR enmError)
|
|---|
| 878 | {
|
|---|
| 879 | PKFSHASHA pHashEntry = (PKFSHASHA)kHlpAlloc(sizeof(*pHashEntry) + cchPath + 1);
|
|---|
| 880 | if (pHashEntry)
|
|---|
| 881 | {
|
|---|
| 882 | pHashEntry->uHashPath = uHashPath;
|
|---|
| 883 | pHashEntry->cchPath = cchPath;
|
|---|
| 884 | pHashEntry->pszPath = (const char *)kHlpMemCopy(pHashEntry + 1, pszPath, cchPath + 1);
|
|---|
| 885 | pHashEntry->pFsObj = pFsObj;
|
|---|
| 886 | pHashEntry->enmError = enmError;
|
|---|
| 887 | if (pFsObj)
|
|---|
| 888 | pHashEntry->uCacheGen = pCache->uGeneration;
|
|---|
| 889 | else if (enmError != KFSLOOKUPERROR_UNSUPPORTED)
|
|---|
| 890 | pHashEntry->uCacheGen = pCache->uGenerationMissing;
|
|---|
| 891 | else
|
|---|
| 892 | pHashEntry->uCacheGen = KFSWOBJ_CACHE_GEN_IGNORE;
|
|---|
| 893 |
|
|---|
| 894 | pHashEntry->pNext = pCache->apAnsiPaths[idxHashTab];
|
|---|
| 895 | pCache->apAnsiPaths[idxHashTab] = pHashEntry;
|
|---|
| 896 |
|
|---|
| 897 | pCache->cbAnsiPaths += sizeof(*pHashEntry) + cchPath + 1;
|
|---|
| 898 | pCache->cAnsiPaths++;
|
|---|
| 899 | if (pHashEntry->pNext)
|
|---|
| 900 | pCache->cAnsiPathCollisions++;
|
|---|
| 901 | }
|
|---|
| 902 | }
|
|---|
| 903 |
|
|---|
| 904 |
|
|---|
| 905 | /**
|
|---|
| 906 | * Links the child in under the parent.
|
|---|
| 907 | *
|
|---|
| 908 | * @returns K_TRUE on success, K_FALSE if out of memory.
|
|---|
| 909 | * @param pParent The parent node.
|
|---|
| 910 | * @param pChild The child node.
|
|---|
| 911 | */
|
|---|
| 912 | static KBOOL kFsCacheDirAddChild(PKFSCACHE pCache, PKFSDIR pParent, PKFSOBJ pChild, KFSLOOKUPERROR *penmError)
|
|---|
| 913 | {
|
|---|
| 914 | if ((pParent->cChildren % 16) == 0)
|
|---|
| 915 | {
|
|---|
| 916 | void *pvNew = kHlpRealloc(pParent->papChildren, (pParent->cChildren + 16) * sizeof(pParent->papChildren[0]));
|
|---|
| 917 | if (!pvNew)
|
|---|
| 918 | return K_FALSE;
|
|---|
| 919 | pParent->papChildren = (PKFSOBJ *)pvNew;
|
|---|
| 920 | pCache->cbObjects += 16 * sizeof(pParent->papChildren[0]);
|
|---|
| 921 | }
|
|---|
| 922 | pParent->papChildren[pParent->cChildren++] = pChild;
|
|---|
| 923 | return K_TRUE;
|
|---|
| 924 | }
|
|---|
| 925 |
|
|---|
| 926 |
|
|---|
| 927 | /**
|
|---|
| 928 | * Creates a new cache object.
|
|---|
| 929 | *
|
|---|
| 930 | * @returns Pointer (with 1 reference) to the new object. The object will not
|
|---|
| 931 | * be linked to the parent directory yet.
|
|---|
| 932 | *
|
|---|
| 933 | * NULL if we're out of memory.
|
|---|
| 934 | *
|
|---|
| 935 | * @param pCache The cache.
|
|---|
| 936 | * @param pParent The parent directory.
|
|---|
| 937 | * @param pszName The ANSI name.
|
|---|
| 938 | * @param cchName The length of the ANSI name.
|
|---|
| 939 | * @param pwszName The UTF-16 name.
|
|---|
| 940 | * @param cwcName The length of the UTF-16 name.
|
|---|
| 941 | * @param pszShortName The ANSI short name, NULL if none.
|
|---|
| 942 | * @param cchShortName The length of the ANSI short name, 0 if none.
|
|---|
| 943 | * @param pwszShortName The UTF-16 short name, NULL if none.
|
|---|
| 944 | * @param cwcShortName The length of the UTF-16 short name, 0 if none.
|
|---|
| 945 | * @param bObjType The objct type.
|
|---|
| 946 | * @param penmError Where to explain failures.
|
|---|
| 947 | */
|
|---|
| 948 | static PKFSOBJ kFsCacheCreateObject(PKFSCACHE pCache, PKFSDIR pParent,
|
|---|
| 949 | char const *pszName, KU16 cchName, wchar_t const *pwszName, KU16 cwcName,
|
|---|
| 950 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 951 | char const *pszShortName, KU16 cchShortName, wchar_t const *pwszShortName, KU16 cwcShortName,
|
|---|
| 952 | #endif
|
|---|
| 953 | KU8 bObjType, KFSLOOKUPERROR *penmError)
|
|---|
| 954 | {
|
|---|
| 955 | /*
|
|---|
| 956 | * Allocate the object.
|
|---|
| 957 | */
|
|---|
| 958 | KBOOL const fDirish = bObjType != KFSOBJ_TYPE_FILE && bObjType == KFSOBJ_TYPE_OTHER;
|
|---|
| 959 | KSIZE const cbObj = (fDirish ? sizeof(KFSDIR) : sizeof(KFSOBJ))
|
|---|
| 960 | + (cwcName + 1) * sizeof(wchar_t) + cchName + 1
|
|---|
| 961 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 962 | + (cwcShortName > 0 ? (cwcShortName + 1) * sizeof(wchar_t) + cchShortName + 1 : 0)
|
|---|
| 963 | #endif
|
|---|
| 964 | ;
|
|---|
| 965 | PKFSOBJ pObj = (PKFSOBJ)kHlpAlloc(cbObj);
|
|---|
| 966 | if (pObj)
|
|---|
| 967 | {
|
|---|
| 968 | KU8 *pbExtra = (KU8 *)(pObj + 1);
|
|---|
| 969 |
|
|---|
| 970 | pCache->cbObjects += cbObj;
|
|---|
| 971 | pCache->cObjects++;
|
|---|
| 972 |
|
|---|
| 973 | /*
|
|---|
| 974 | * Initialize the object.
|
|---|
| 975 | */
|
|---|
| 976 | pObj->u32Magic = KFSOBJ_MAGIC;
|
|---|
| 977 | pObj->cRefs = 1;
|
|---|
| 978 | pObj->uCacheGen = bObjType != KFSOBJ_TYPE_MISSING ? pCache->uGeneration : pCache->uGenerationMissing;
|
|---|
| 979 | pObj->bObjType = bObjType;
|
|---|
| 980 | pObj->fHaveStats = K_FALSE;
|
|---|
| 981 | pObj->abUnused[0] = K_FALSE;
|
|---|
| 982 | pObj->abUnused[1] = K_FALSE;
|
|---|
| 983 | pObj->fFlags = pParent->Obj.fFlags;
|
|---|
| 984 | pObj->pParent = pParent;
|
|---|
| 985 |
|
|---|
| 986 | #ifdef KFSCACHE_CFG_UTF16
|
|---|
| 987 | pObj->cwcParent = pParent->Obj.cwcParent + pParent->Obj.cwcName + !!pParent->Obj.cwcName;
|
|---|
| 988 | pObj->pwszName = (wchar_t *)kHlpMemCopy(pbExtra, pwszName, cwcName * sizeof(wchar_t));
|
|---|
| 989 | pbExtra += cwcName * sizeof(wchar_t);
|
|---|
| 990 | *pbExtra++ = '\0';
|
|---|
| 991 | *pbExtra++ = '\0';
|
|---|
| 992 | # ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 993 | pObj->cwcShortParent = pParent->Obj.cwcShortParent + pParent->Obj.cwcShortName + !!pParent->Obj.cwcShortName;
|
|---|
| 994 | if (cwcShortName)
|
|---|
| 995 | {
|
|---|
| 996 | pObj->pwszShortName = (wchar_t *)kHlpMemCopy(pbExtra, pwszShortName, cwcShortName * sizeof(wchar_t));
|
|---|
| 997 | pbExtra += cwcShortName * sizeof(wchar_t);
|
|---|
| 998 | *pbExtra++ = '\0';
|
|---|
| 999 | *pbExtra++ = '\0';
|
|---|
| 1000 | }
|
|---|
| 1001 | else
|
|---|
| 1002 | {
|
|---|
| 1003 | pObj->pwszShortName = pObj->pwszName;
|
|---|
| 1004 | pObj->cwcShortName = pObj->cwcName;
|
|---|
| 1005 | }
|
|---|
| 1006 | # endif
|
|---|
| 1007 | #endif
|
|---|
| 1008 | pObj->cchParent = pParent->Obj.cchParent + pParent->Obj.cchName + !!pParent->Obj.cchName;
|
|---|
| 1009 | pObj->pszName = (char *)kHlpMemCopy(pbExtra, pszName, cchName);
|
|---|
| 1010 | pbExtra += cchName;
|
|---|
| 1011 | *pbExtra++ = '\0';
|
|---|
| 1012 | # ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1013 | pObj->cchShortParent = pParent->Obj.cchShortParent + pParent->Obj.cchShortName + !!pParent->Obj.cchShortName;
|
|---|
| 1014 | if (cchShortName)
|
|---|
| 1015 | {
|
|---|
| 1016 | pObj->pszShortName = (char *)kHlpMemCopy(pbExtra, pszShortName, cchShortName);
|
|---|
| 1017 | pbExtra += cchShortName;
|
|---|
| 1018 | *pbExtra++ = '\0';
|
|---|
| 1019 | }
|
|---|
| 1020 | else
|
|---|
| 1021 | {
|
|---|
| 1022 | pObj->pszShortName = pObj->pszName;
|
|---|
| 1023 | pObj->cchShortName = pObj->cchName;
|
|---|
| 1024 | }
|
|---|
| 1025 | #endif
|
|---|
| 1026 | kHlpAssert(pbExtra - (KU8 *)pObj == cbObj);
|
|---|
| 1027 |
|
|---|
| 1028 | /*
|
|---|
| 1029 | * Type specific initilization.
|
|---|
| 1030 | */
|
|---|
| 1031 | if (fDirish)
|
|---|
| 1032 | {
|
|---|
| 1033 | PKFSDIR pDirObj = (PKFSDIR)pObj;
|
|---|
| 1034 | pDirObj->cChildren = 0;
|
|---|
| 1035 | pDirObj->papChildren = NULL;
|
|---|
| 1036 | pDirObj->cHashTab = 0;
|
|---|
| 1037 | pDirObj->paHashTab = NULL;
|
|---|
| 1038 | pDirObj->hDir = INVALID_HANDLE_VALUE;
|
|---|
| 1039 | pDirObj->uDevNo = pParent->uDevNo;
|
|---|
| 1040 | pDirObj->fPopulated = K_FALSE;
|
|---|
| 1041 | }
|
|---|
| 1042 | }
|
|---|
| 1043 | else
|
|---|
| 1044 | *penmError = KFSLOOKUPERROR_OUT_OF_MEMORY;
|
|---|
| 1045 | return pObj;
|
|---|
| 1046 | }
|
|---|
| 1047 |
|
|---|
| 1048 |
|
|---|
| 1049 | /**
|
|---|
| 1050 | * Creates a new object given wide char names.
|
|---|
| 1051 | *
|
|---|
| 1052 | * This function just converts the paths and calls kFsCacheCreateObject.
|
|---|
| 1053 | *
|
|---|
| 1054 | *
|
|---|
| 1055 | * @returns Pointer (with 1 reference) to the new object. The object will not
|
|---|
| 1056 | * be linked to the parent directory yet.
|
|---|
| 1057 | *
|
|---|
| 1058 | * NULL if we're out of memory.
|
|---|
| 1059 | *
|
|---|
| 1060 | * @param pCache The cache.
|
|---|
| 1061 | * @param pParent The parent directory.
|
|---|
| 1062 | * @param pszName The ANSI name.
|
|---|
| 1063 | * @param cchName The length of the ANSI name.
|
|---|
| 1064 | * @param pwszName The UTF-16 name.
|
|---|
| 1065 | * @param cwcName The length of the UTF-16 name.
|
|---|
| 1066 | * @param pwszShortName The UTF-16 short name, NULL if none.
|
|---|
| 1067 | * @param cwcShortName The length of the UTF-16 short name, 0 if none.
|
|---|
| 1068 | * @param bObjType The objct type.
|
|---|
| 1069 | * @param penmError Where to explain failures.
|
|---|
| 1070 | */
|
|---|
| 1071 | static PKFSOBJ kFsCacheCreateObjectW(PKFSCACHE pCache, PKFSDIR pParent, wchar_t const *pwszName, KU32 cwcName,
|
|---|
| 1072 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1073 | wchar_t const *pwszShortName, KU32 cwcShortName,
|
|---|
| 1074 | #endif
|
|---|
| 1075 | KU8 bObjType, KFSLOOKUPERROR *penmError)
|
|---|
| 1076 | {
|
|---|
| 1077 | /* Convert names to ANSI first so we know their lengths. */
|
|---|
| 1078 | char szName[KFSCACHE_CFG_MAX_ANSI_NAME];
|
|---|
| 1079 | int cchName = WideCharToMultiByte(CP_ACP, 0, pwszName, cwcName, szName, sizeof(szName) - 1, NULL, NULL);
|
|---|
| 1080 | if (cchName >= 0)
|
|---|
| 1081 | {
|
|---|
| 1082 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1083 | char szShortName[12*3 + 1];
|
|---|
| 1084 | int cchShortName = 0;
|
|---|
| 1085 | if ( cwcShortName == 0
|
|---|
| 1086 | || (cchShortName = WideCharToMultiByte(CP_ACP, 0, pwszShortName, cwcShortName,
|
|---|
| 1087 | szShortName, sizeof(szShortName) - 1, NULL, NULL)) > 0)
|
|---|
| 1088 | #endif
|
|---|
| 1089 | {
|
|---|
| 1090 | return kFsCacheCreateObject(pCache, pParent,
|
|---|
| 1091 | szName, cchName, pwszName, cwcName,
|
|---|
| 1092 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1093 | szShortName, cchShortName, pwszShortName, cwcShortName,
|
|---|
| 1094 | #endif
|
|---|
| 1095 | bObjType, penmError);
|
|---|
| 1096 | }
|
|---|
| 1097 | }
|
|---|
| 1098 | *penmError = KFSLOOKUPERROR_ANSI_CONVERSION_ERROR;
|
|---|
| 1099 | return NULL;
|
|---|
| 1100 | }
|
|---|
| 1101 |
|
|---|
| 1102 |
|
|---|
| 1103 | /**
|
|---|
| 1104 | * Creates a missing object.
|
|---|
| 1105 | *
|
|---|
| 1106 | * This is used for caching negative results.
|
|---|
| 1107 | *
|
|---|
| 1108 | * @returns Pointer to the newly created object on success (already linked into
|
|---|
| 1109 | * pParent). No reference.
|
|---|
| 1110 | *
|
|---|
| 1111 | * NULL on failure.
|
|---|
| 1112 | *
|
|---|
| 1113 | * @param pCache The cache.
|
|---|
| 1114 | * @param pParent The parent directory.
|
|---|
| 1115 | * @param pchName The name.
|
|---|
| 1116 | * @param cchName The length of the name.
|
|---|
| 1117 | * @param penmError Where to return failure explanations.
|
|---|
| 1118 | */
|
|---|
| 1119 | static PKFSOBJ kFsCacheCreateMissingA(PKFSCACHE pCache, PKFSDIR pParent, const char *pchName, KU32 cchName,
|
|---|
| 1120 | KFSLOOKUPERROR *penmError)
|
|---|
| 1121 | {
|
|---|
| 1122 | /*
|
|---|
| 1123 | * Just convert the name to UTF-16 and call kFsCacheCreateObject to do the job.
|
|---|
| 1124 | */
|
|---|
| 1125 | wchar_t wszName[KFSCACHE_CFG_MAX_PATH];
|
|---|
| 1126 | int cwcName = MultiByteToWideChar(CP_ACP, 0, pchName, cchName, wszName, KFSCACHE_CFG_MAX_UTF16_NAME - 1);
|
|---|
| 1127 | if (cwcName > 0)
|
|---|
| 1128 | {
|
|---|
| 1129 | /** @todo check that it actually doesn't exists before we add it. We should not
|
|---|
| 1130 | * trust the directory enumeration here, or maybe we should?? */
|
|---|
| 1131 |
|
|---|
| 1132 | PKFSOBJ pMissing = kFsCacheCreateObject(pCache, pParent, pchName, cchName, wszName, cwcName,
|
|---|
| 1133 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1134 | NULL, 0, NULL, 0,
|
|---|
| 1135 | #endif
|
|---|
| 1136 | KFSOBJ_TYPE_MISSING, penmError);
|
|---|
| 1137 | if (pMissing)
|
|---|
| 1138 | {
|
|---|
| 1139 | KBOOL fRc = kFsCacheDirAddChild(pCache, pParent, pMissing, penmError);
|
|---|
| 1140 | kFsCacheObjRelease(pCache, pMissing);
|
|---|
| 1141 | return fRc ? pMissing : NULL;
|
|---|
| 1142 | }
|
|---|
| 1143 | return NULL;
|
|---|
| 1144 | }
|
|---|
| 1145 | *penmError = KFSLOOKUPERROR_UTF16_CONVERSION_ERROR;
|
|---|
| 1146 | return NULL;
|
|---|
| 1147 | }
|
|---|
| 1148 |
|
|---|
| 1149 |
|
|---|
| 1150 | /**
|
|---|
| 1151 | * Does the initial directory populating or refreshes it if it has been
|
|---|
| 1152 | * invalidated.
|
|---|
| 1153 | *
|
|---|
| 1154 | * This assumes the parent directory is opened.
|
|---|
| 1155 | *
|
|---|
| 1156 | * @returns K_TRUE on success, K_FALSE on error.
|
|---|
| 1157 | * @param pCache The cache.
|
|---|
| 1158 | * @param pDir The directory.
|
|---|
| 1159 | * @param penmError Where to store K_FALSE explanation.
|
|---|
| 1160 | */
|
|---|
| 1161 | static KBOOL kFsCachePopuplateOrRefreshDir(PKFSCACHE pCache, PKFSDIR pDir, KFSLOOKUPERROR *penmError)
|
|---|
| 1162 | {
|
|---|
| 1163 | KBOOL fRefreshing = K_FALSE;
|
|---|
| 1164 | /** @todo will have to make this more flexible wrt information classes since
|
|---|
| 1165 | * older windows versions (XP, w2K) might not correctly support the
|
|---|
| 1166 | * ones with file ID on all file systems. */
|
|---|
| 1167 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1168 | MY_FILE_INFORMATION_CLASS enmInfoClass = MyFileIdBothDirectoryInformation;
|
|---|
| 1169 | #else
|
|---|
| 1170 | MY_FILE_INFORMATION_CLASS enmInfoClass = MyFileIdFullDirectoryInformation;
|
|---|
| 1171 | #endif
|
|---|
| 1172 | MY_NTSTATUS rcNt;
|
|---|
| 1173 | MY_IO_STATUS_BLOCK Ios;
|
|---|
| 1174 | union
|
|---|
| 1175 | {
|
|---|
| 1176 | /* Include the structures for better alignment. */
|
|---|
| 1177 | MY_FILE_ID_BOTH_DIR_INFORMATION WithId;
|
|---|
| 1178 | MY_FILE_ID_FULL_DIR_INFORMATION NoId;
|
|---|
| 1179 | /* Buffer padding. We're using a 56KB buffer here to avoid size troubles with CIFS and such. */
|
|---|
| 1180 | KU8 abBuf[56*1024];
|
|---|
| 1181 | } uBuf;
|
|---|
| 1182 |
|
|---|
| 1183 | /*
|
|---|
| 1184 | * Open the directory.
|
|---|
| 1185 | */
|
|---|
| 1186 | if (pDir->hDir == INVALID_HANDLE_VALUE)
|
|---|
| 1187 | {
|
|---|
| 1188 | MY_OBJECT_ATTRIBUTES ObjAttr;
|
|---|
| 1189 | MY_UNICODE_STRING UniStr;
|
|---|
| 1190 |
|
|---|
| 1191 | kHlpAssert(!pDir->fPopulated);
|
|---|
| 1192 |
|
|---|
| 1193 | Ios.Information = -1;
|
|---|
| 1194 | Ios.u.Status = -1;
|
|---|
| 1195 |
|
|---|
| 1196 | UniStr.Buffer = (wchar_t *)pDir->Obj.pwszName;
|
|---|
| 1197 | UniStr.Length = (USHORT)(pDir->Obj.cwcName * sizeof(wchar_t));
|
|---|
| 1198 | UniStr.MaximumLength = UniStr.Length + sizeof(wchar_t);
|
|---|
| 1199 |
|
|---|
| 1200 | kHlpAssertStmtReturn(pDir->Obj.pParent, *penmError = KFSLOOKUPERROR_INTERNAL_ERROR, K_FALSE);
|
|---|
| 1201 | kHlpAssertStmtReturn(pDir->Obj.pParent->hDir != INVALID_HANDLE_VALUE, *penmError = KFSLOOKUPERROR_INTERNAL_ERROR, K_FALSE);
|
|---|
| 1202 | MyInitializeObjectAttributes(&ObjAttr, &UniStr, OBJ_CASE_INSENSITIVE, pDir->Obj.pParent->hDir, NULL /*pSecAttr*/);
|
|---|
| 1203 |
|
|---|
| 1204 | /** @todo FILE_OPEN_REPARSE_POINT? */
|
|---|
| 1205 | rcNt = g_pfnNtCreateFile(&pDir->hDir,
|
|---|
| 1206 | FILE_READ_DATA | FILE_LIST_DIRECTORY | FILE_READ_ATTRIBUTES | SYNCHRONIZE,
|
|---|
| 1207 | &ObjAttr,
|
|---|
| 1208 | &Ios,
|
|---|
| 1209 | NULL, /*cbFileInitialAlloc */
|
|---|
| 1210 | FILE_ATTRIBUTE_NORMAL,
|
|---|
| 1211 | FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
|
|---|
| 1212 | FILE_OPEN,
|
|---|
| 1213 | FILE_DIRECTORY_FILE | FILE_OPEN_FOR_BACKUP_INTENT | FILE_SYNCHRONOUS_IO_NONALERT,
|
|---|
| 1214 | NULL, /*pEaBuffer*/
|
|---|
| 1215 | 0); /*cbEaBuffer*/
|
|---|
| 1216 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1217 | { /* likely */ }
|
|---|
| 1218 | else
|
|---|
| 1219 | {
|
|---|
| 1220 | pDir->hDir = INVALID_HANDLE_VALUE;
|
|---|
| 1221 | *penmError = KFSLOOKUPERROR_DIR_OPEN_ERROR;
|
|---|
| 1222 | return K_FALSE;
|
|---|
| 1223 | }
|
|---|
| 1224 | }
|
|---|
| 1225 | else if (pDir->fPopulated)
|
|---|
| 1226 | {
|
|---|
| 1227 | /** @todo refreshing directories. */
|
|---|
| 1228 | __debugbreak();
|
|---|
| 1229 | fRefreshing = K_TRUE;
|
|---|
| 1230 | }
|
|---|
| 1231 |
|
|---|
| 1232 |
|
|---|
| 1233 | /*
|
|---|
| 1234 | * Enumerate the directory content.
|
|---|
| 1235 | */
|
|---|
| 1236 | Ios.Information = -1;
|
|---|
| 1237 | Ios.u.Status = -1;
|
|---|
| 1238 | rcNt = g_pfnNtQueryDirectoryFile(pDir->hDir,
|
|---|
| 1239 | NULL, /* hEvent */
|
|---|
| 1240 | NULL, /* pfnApcComplete */
|
|---|
| 1241 | NULL, /* pvApcCompleteCtx */
|
|---|
| 1242 | &Ios,
|
|---|
| 1243 | &uBuf,
|
|---|
| 1244 | sizeof(uBuf),
|
|---|
| 1245 | enmInfoClass,
|
|---|
| 1246 | FALSE, /* fReturnSingleEntry */
|
|---|
| 1247 | NULL, /* Filter / restart pos. */
|
|---|
| 1248 | TRUE); /* fRestartScan */
|
|---|
| 1249 | while (MY_NT_SUCCESS(rcNt))
|
|---|
| 1250 | {
|
|---|
| 1251 | /*
|
|---|
| 1252 | * Process the entries in the buffer.
|
|---|
| 1253 | */
|
|---|
| 1254 | KSIZE offBuf = 0;
|
|---|
| 1255 | for (;;)
|
|---|
| 1256 | {
|
|---|
| 1257 | union
|
|---|
| 1258 | {
|
|---|
| 1259 | KU8 *pb;
|
|---|
| 1260 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1261 | MY_FILE_ID_BOTH_DIR_INFORMATION *pWithId;
|
|---|
| 1262 | MY_FILE_BOTH_DIR_INFORMATION *pNoId;
|
|---|
| 1263 | #else
|
|---|
| 1264 | MY_FILE_ID_FULL_DIR_INFORMATION *pWithId;
|
|---|
| 1265 | MY_FILE_FULL_DIR_INFORMATION *pNoId;
|
|---|
| 1266 | #endif
|
|---|
| 1267 | } uPtr;
|
|---|
| 1268 | PKFSOBJ pCur;
|
|---|
| 1269 | KU32 offNext;
|
|---|
| 1270 | KU32 cbMinCur;
|
|---|
| 1271 | wchar_t *pwszFilename;
|
|---|
| 1272 |
|
|---|
| 1273 | /* ASSUME only the FileName member differs between the two structures. */
|
|---|
| 1274 | uPtr.pb = &uBuf.abBuf[offBuf];
|
|---|
| 1275 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1276 | pwszFilename = enmInfoClass == MyFileIdBothDirectoryInformation
|
|---|
| 1277 | ? &uPtr.pWithId->FileName[0] : &uPtr.pNoId->FileName[0];
|
|---|
| 1278 | #else
|
|---|
| 1279 | pwszFilename = enmInfoClass == MyFileIdFullDirectoryInformation
|
|---|
| 1280 | ? &uPtr.pWithId->FileName[0] : &uPtr.pNoId->FileName[0];
|
|---|
| 1281 | #endif
|
|---|
| 1282 | /*
|
|---|
| 1283 | * Create the entry (not linked yet).
|
|---|
| 1284 | */
|
|---|
| 1285 | pCur = kFsCacheCreateObjectW(pCache, pDir, pwszFilename, uPtr.pNoId->FileNameLength / sizeof(wchar_t),
|
|---|
| 1286 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1287 | uPtr.pNoId->ShortName, uPtr.pNoId->ShortNameLength / sizeof(wchar_t),
|
|---|
| 1288 | #endif
|
|---|
| 1289 | uPtr.pNoId->FileAttributes & FILE_ATTRIBUTE_DIRECTORY ? KFSOBJ_TYPE_DIR
|
|---|
| 1290 | : uPtr.pNoId->FileAttributes & (FILE_ATTRIBUTE_DEVICE | FILE_ATTRIBUTE_REPARSE_POINT)
|
|---|
| 1291 | ? KFSOBJ_TYPE_OTHER : KFSOBJ_TYPE_FILE,
|
|---|
| 1292 | penmError);
|
|---|
| 1293 | if (!pCur)
|
|---|
| 1294 | return K_FALSE;
|
|---|
| 1295 | kHlpAssert(pCur->cRefs == 1);
|
|---|
| 1296 |
|
|---|
| 1297 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1298 | if (enmInfoClass == MyFileIdBothDirectoryInformation)
|
|---|
| 1299 | birdStatFillFromFileIdBothDirInfo(&pCur->Stats, uPtr.pWithId, pCur->pszName);
|
|---|
| 1300 | else
|
|---|
| 1301 | birdStatFillFromFileBothDirInfo(&pCur->Stats, uPtr.pNoId, pCur->pszName);
|
|---|
| 1302 | #else
|
|---|
| 1303 | if (enmInfoClass == MyFileIdBothDirectoryInformation)
|
|---|
| 1304 | birdStatFillFromFileIdFullDirInfo(&pCur->Stats, uPtr.pWithId, pCur->pszName);
|
|---|
| 1305 | else
|
|---|
| 1306 | birdStatFillFromFileFullDirInfo(&pCur->Stats, uPtr.pNoId, pCur->pszName);
|
|---|
| 1307 | #endif
|
|---|
| 1308 | pCur->Stats.st_dev = pDir->uDevNo;
|
|---|
| 1309 |
|
|---|
| 1310 | /*
|
|---|
| 1311 | * If we're updating we have to check the data.
|
|---|
| 1312 | */
|
|---|
| 1313 | if (fRefreshing)
|
|---|
| 1314 | {
|
|---|
| 1315 | __debugbreak();
|
|---|
| 1316 | }
|
|---|
| 1317 |
|
|---|
| 1318 | /*
|
|---|
| 1319 | * If we've still got pCur, add it to the directory.
|
|---|
| 1320 | */
|
|---|
| 1321 | if (pCur)
|
|---|
| 1322 | {
|
|---|
| 1323 | KBOOL fRc = kFsCacheDirAddChild(pCache, pDir, pCur, penmError);
|
|---|
| 1324 | kFsCacheObjRelease(pCache, pCur);
|
|---|
| 1325 | if (fRc)
|
|---|
| 1326 | { /* likely */ }
|
|---|
| 1327 | else
|
|---|
| 1328 | return K_FALSE;
|
|---|
| 1329 | }
|
|---|
| 1330 |
|
|---|
| 1331 | /*
|
|---|
| 1332 | * Advance.
|
|---|
| 1333 | */
|
|---|
| 1334 | offNext = uPtr.pNoId->NextEntryOffset;
|
|---|
| 1335 | if ( offNext >= cbMinCur
|
|---|
| 1336 | && offNext < sizeof(uBuf))
|
|---|
| 1337 | offBuf += offNext;
|
|---|
| 1338 | else
|
|---|
| 1339 | break;
|
|---|
| 1340 | }
|
|---|
| 1341 |
|
|---|
| 1342 | /*
|
|---|
| 1343 | * Read the next chunk.
|
|---|
| 1344 | */
|
|---|
| 1345 | rcNt = g_pfnNtQueryDirectoryFile(pDir->hDir,
|
|---|
| 1346 | NULL, /* hEvent */
|
|---|
| 1347 | NULL, /* pfnApcComplete */
|
|---|
| 1348 | NULL, /* pvApcCompleteCtx */
|
|---|
| 1349 | &Ios,
|
|---|
| 1350 | &uBuf,
|
|---|
| 1351 | sizeof(uBuf),
|
|---|
| 1352 | enmInfoClass,
|
|---|
| 1353 | FALSE, /* fReturnSingleEntry */
|
|---|
| 1354 | NULL, /* Filter / restart pos. */
|
|---|
| 1355 | FALSE); /* fRestartScan */
|
|---|
| 1356 | }
|
|---|
| 1357 |
|
|---|
| 1358 | if (rcNt == MY_STATUS_NO_MORE_FILES)
|
|---|
| 1359 | return K_TRUE;
|
|---|
| 1360 | kHlpAssertMsgFailed(("%#x\n", rcNt));
|
|---|
| 1361 | *penmError = KFSLOOKUPERROR_DIR_READ_ERROR;
|
|---|
| 1362 | return K_TRUE;
|
|---|
| 1363 | }
|
|---|
| 1364 |
|
|---|
| 1365 |
|
|---|
| 1366 | static KBOOL kFsCacheRefreshMissing(PKFSCACHE pCache, PKFSOBJ pMissing, KFSLOOKUPERROR *penmError)
|
|---|
| 1367 | {
|
|---|
| 1368 | return K_TRUE;
|
|---|
| 1369 | }
|
|---|
| 1370 |
|
|---|
| 1371 |
|
|---|
| 1372 | static KBOOL kFsCacheRefreshMissingIntermediateDir(PKFSCACHE pCache, PKFSOBJ pMissing, KFSLOOKUPERROR *penmError)
|
|---|
| 1373 | {
|
|---|
| 1374 | return K_TRUE;
|
|---|
| 1375 | }
|
|---|
| 1376 |
|
|---|
| 1377 |
|
|---|
| 1378 | static KBOOL kFsCacheRefreshObj(PKFSCACHE pCache, PKFSOBJ pObj, KFSLOOKUPERROR *penmError)
|
|---|
| 1379 | {
|
|---|
| 1380 | return K_FALSE;
|
|---|
| 1381 | }
|
|---|
| 1382 |
|
|---|
| 1383 |
|
|---|
| 1384 | /**
|
|---|
| 1385 | * Refreshes a path hash that has expired.
|
|---|
| 1386 | *
|
|---|
| 1387 | * @returns pHash on success, NULL if removed.
|
|---|
| 1388 | * @param pCache The cache.
|
|---|
| 1389 | * @param pHashEntry The path hash.
|
|---|
| 1390 | * @param idxHashTab The hash table entry.
|
|---|
| 1391 | */
|
|---|
| 1392 | static PKFSHASHA kFsCacheRefreshPathA(PKFSCACHE pCache, PKFSHASHA pHashEntry, KU32 idxHashTab)
|
|---|
| 1393 | {
|
|---|
| 1394 | /** @todo implement once we've start inserting uCacheGen nodes. */
|
|---|
| 1395 | __debugbreak();
|
|---|
| 1396 | K_NOREF(pCache);
|
|---|
| 1397 | K_NOREF(idxHashTab);
|
|---|
| 1398 | return pHashEntry;
|
|---|
| 1399 | }
|
|---|
| 1400 |
|
|---|
| 1401 |
|
|---|
| 1402 | /**
|
|---|
| 1403 | * Look up a child node, ANSI version.
|
|---|
| 1404 | *
|
|---|
| 1405 | * @returns Pointer to the child if found, NULL if not.
|
|---|
| 1406 | * @param pCache The cache.
|
|---|
| 1407 | * @param pParent The parent directory to search.
|
|---|
| 1408 | * @param pchName The child name to search for (not terminated).
|
|---|
| 1409 | * @param cchName The length of the child name.
|
|---|
| 1410 | */
|
|---|
| 1411 | static PKFSOBJ kFsCacheFindChildA(PKFSCACHE pCache, PKFSDIR pParent, const char *pchName, KU32 cchName)
|
|---|
| 1412 | {
|
|---|
| 1413 | /* Check for '.' first. */
|
|---|
| 1414 | if (cchName != 1 || *pchName != '.')
|
|---|
| 1415 | {
|
|---|
| 1416 | KU32 cLeft;
|
|---|
| 1417 | PKFSOBJ *ppCur;
|
|---|
| 1418 |
|
|---|
| 1419 | if (pParent->paHashTab != NULL)
|
|---|
| 1420 | {
|
|---|
| 1421 | /** @todo directory hash table lookup. */
|
|---|
| 1422 | }
|
|---|
| 1423 |
|
|---|
| 1424 | /* Linear search. */
|
|---|
| 1425 | cLeft = pParent->cChildren;
|
|---|
| 1426 | ppCur = pParent->papChildren;
|
|---|
| 1427 | while (cLeft-- > 0)
|
|---|
| 1428 | {
|
|---|
| 1429 | PKFSOBJ pCur = *ppCur++;
|
|---|
| 1430 | if ( ( pCur->cchName == cchName
|
|---|
| 1431 | && _memicmp(pCur->pszName, pchName, cchName) == 0)
|
|---|
| 1432 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1433 | || ( pCur->cchShortName == cchName
|
|---|
| 1434 | && pCur->pszShortName != pCur->pszName
|
|---|
| 1435 | && _memicmp(pCur->pszName, pchName, cchName) == 0)
|
|---|
| 1436 | #endif
|
|---|
| 1437 | )
|
|---|
| 1438 | return pCur;
|
|---|
| 1439 | }
|
|---|
| 1440 | return NULL;
|
|---|
| 1441 | }
|
|---|
| 1442 | return &pParent->Obj;
|
|---|
| 1443 | }
|
|---|
| 1444 |
|
|---|
| 1445 |
|
|---|
| 1446 | /**
|
|---|
| 1447 | * Looks up a UNC share, ANSI version.
|
|---|
| 1448 | *
|
|---|
| 1449 | * We keep both the server and share in the root directory entry. This means we
|
|---|
| 1450 | * have to clean up the entry name before we can insert it.
|
|---|
| 1451 | *
|
|---|
| 1452 | * @returns Pointer to the share root directory or an update-to-date missing
|
|---|
| 1453 | * node.
|
|---|
| 1454 | * @param pCache The cache.
|
|---|
| 1455 | * @param pszPath The path.
|
|---|
| 1456 | * @param poff Where to return the root dire.
|
|---|
| 1457 | * @param penmError Where to return details as to why the lookup
|
|---|
| 1458 | * failed.
|
|---|
| 1459 | */
|
|---|
| 1460 | static PKFSOBJ kFswCacheLookupUncShareA(PKFSCACHE pCache, const char *pszPath, KU32 *poff, KFSLOOKUPERROR *penmError)
|
|---|
| 1461 | {
|
|---|
| 1462 | #if 0 /* later */
|
|---|
| 1463 | KU32 offStartServer;
|
|---|
| 1464 | KU32 offEndServer;
|
|---|
| 1465 | KU32 offStartShare;
|
|---|
| 1466 |
|
|---|
| 1467 | KU32 offEnd = 2;
|
|---|
| 1468 | while (IS_SLASH(pszPath[offEnd]))
|
|---|
| 1469 | offEnd++;
|
|---|
| 1470 |
|
|---|
| 1471 | offStartServer = offEnd;
|
|---|
| 1472 | while ( (ch = pszPath[offEnd]) != '\0'
|
|---|
| 1473 | && !IS_SLASH(ch))
|
|---|
| 1474 | offEnd++;
|
|---|
| 1475 | offEndServer = offEnd;
|
|---|
| 1476 |
|
|---|
| 1477 | if (ch != '\0')
|
|---|
| 1478 | { /* likely */ }
|
|---|
| 1479 | else
|
|---|
| 1480 | {
|
|---|
| 1481 | *penmError = KFSLOOKUPERROR_NOT_FOUND;
|
|---|
| 1482 | return NULL;
|
|---|
| 1483 | }
|
|---|
| 1484 |
|
|---|
| 1485 | while (IS_SLASH(pszPath[offEnd]))
|
|---|
| 1486 | offEnd++;
|
|---|
| 1487 | offStartServer = offEnd;
|
|---|
| 1488 | while ( (ch = pszPath[offEnd]) != '\0'
|
|---|
| 1489 | && !IS_SLASH(ch))
|
|---|
| 1490 | offEnd++;
|
|---|
| 1491 | #endif
|
|---|
| 1492 | *penmError = KFSLOOKUPERROR_UNSUPPORTED;
|
|---|
| 1493 | return NULL;
|
|---|
| 1494 | }
|
|---|
| 1495 |
|
|---|
| 1496 |
|
|---|
| 1497 | /**
|
|---|
| 1498 | * Looks up a drive letter.
|
|---|
| 1499 | *
|
|---|
| 1500 | * Will enter the drive if necessary.
|
|---|
| 1501 | *
|
|---|
| 1502 | * @returns Pointer to the root directory of the drive or an update-to-date
|
|---|
| 1503 | * missing node.
|
|---|
| 1504 | * @param pCache The cache.
|
|---|
| 1505 | * @param chLetter The uppercased drive letter.
|
|---|
| 1506 | * @param penmError Where to return details as to why the lookup
|
|---|
| 1507 | * failed.
|
|---|
| 1508 | */
|
|---|
| 1509 | static PKFSOBJ kFswCacheLookupDrive(PKFSCACHE pCache, char chLetter, KFSLOOKUPERROR *penmError)
|
|---|
| 1510 | {
|
|---|
| 1511 | KU32 const uHash = chLetter - 'A';
|
|---|
| 1512 | KU32 cLeft;
|
|---|
| 1513 | PKFSOBJ *ppCur;
|
|---|
| 1514 |
|
|---|
| 1515 | MY_UNICODE_STRING NtPath;
|
|---|
| 1516 | wchar_t wszTmp[8];
|
|---|
| 1517 | MY_NTSTATUS rcNt;
|
|---|
| 1518 | char szTmp[4];
|
|---|
| 1519 |
|
|---|
| 1520 | /*
|
|---|
| 1521 | * Custom drive letter hashing.
|
|---|
| 1522 | */
|
|---|
| 1523 | if (pCache->RootDir.paHashTab)
|
|---|
| 1524 | {
|
|---|
| 1525 | /** @todo PKFSOBJHASH pHash = */
|
|---|
| 1526 | }
|
|---|
| 1527 |
|
|---|
| 1528 | /*
|
|---|
| 1529 | * Special cased lookup.
|
|---|
| 1530 | */
|
|---|
| 1531 | cLeft = pCache->RootDir.cChildren;
|
|---|
| 1532 | ppCur = pCache->RootDir.papChildren;
|
|---|
| 1533 | while (cLeft-- > 0)
|
|---|
| 1534 | {
|
|---|
| 1535 | PKFSOBJ pCur = *ppCur++;
|
|---|
| 1536 | if ( pCur->cchName == 2
|
|---|
| 1537 | && pCur->pszName[0] == chLetter
|
|---|
| 1538 | && pCur->pszName[1] == ':')
|
|---|
| 1539 | {
|
|---|
| 1540 | if (pCur->bObjType == KFSOBJ_TYPE_DIR)
|
|---|
| 1541 | return pCur;
|
|---|
| 1542 | kHlpAssert(pCur->bObjType == KFSOBJ_TYPE_MISSING);
|
|---|
| 1543 | if (kFsCacheRefreshMissingIntermediateDir(pCache, pCur, penmError))
|
|---|
| 1544 | return pCur;
|
|---|
| 1545 | return NULL;
|
|---|
| 1546 | }
|
|---|
| 1547 | }
|
|---|
| 1548 |
|
|---|
| 1549 | /*
|
|---|
| 1550 | * Need to add it. We always keep the drive letters open for the benefit
|
|---|
| 1551 | * of kFsCachePopuplateOrRefreshDir and others.
|
|---|
| 1552 | */
|
|---|
| 1553 | wszTmp[0] = szTmp[0] = chLetter;
|
|---|
| 1554 | wszTmp[1] = szTmp[1] = ':';
|
|---|
| 1555 | wszTmp[2] = szTmp[2] = '\\';
|
|---|
| 1556 | wszTmp[3] = '.';
|
|---|
| 1557 | wszTmp[4] = '\0';
|
|---|
| 1558 | szTmp[2] = '\0';
|
|---|
| 1559 |
|
|---|
| 1560 | NtPath.Buffer = NULL;
|
|---|
| 1561 | NtPath.Length = 0;
|
|---|
| 1562 | NtPath.MaximumLength = 0;
|
|---|
| 1563 | if (g_pfnRtlDosPathNameToNtPathName_U(wszTmp, &NtPath, NULL, NULL))
|
|---|
| 1564 | {
|
|---|
| 1565 | HANDLE hDir;
|
|---|
| 1566 | rcNt = birdOpenFileUniStr(&NtPath,
|
|---|
| 1567 | FILE_READ_DATA | FILE_LIST_DIRECTORY | FILE_READ_ATTRIBUTES | SYNCHRONIZE,
|
|---|
| 1568 | FILE_ATTRIBUTE_NORMAL,
|
|---|
| 1569 | FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
|
|---|
| 1570 | FILE_OPEN,
|
|---|
| 1571 | FILE_DIRECTORY_FILE | FILE_OPEN_FOR_BACKUP_INTENT | FILE_SYNCHRONOUS_IO_NONALERT,
|
|---|
| 1572 | OBJ_CASE_INSENSITIVE,
|
|---|
| 1573 | &hDir);
|
|---|
| 1574 | birdFreeNtPath(&NtPath);
|
|---|
| 1575 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1576 | {
|
|---|
| 1577 | PKFSDIR pDir = (PKFSDIR)kFsCacheCreateObject(pCache, &pCache->RootDir, szTmp, 2, wszTmp, 2,
|
|---|
| 1578 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1579 | NULL, 0, NULL, 0,
|
|---|
| 1580 | #endif
|
|---|
| 1581 | KFSOBJ_TYPE_DIR, penmError);
|
|---|
| 1582 | if (pDir)
|
|---|
| 1583 | {
|
|---|
| 1584 | /*
|
|---|
| 1585 | * We need a little bit of extra info for a drive root. These things are typically
|
|---|
| 1586 | * inherited by subdirectories down the tree, so, we do it all here for till that changes.
|
|---|
| 1587 | */
|
|---|
| 1588 | union
|
|---|
| 1589 | {
|
|---|
| 1590 | MY_FILE_FS_VOLUME_INFORMATION VolInfo;
|
|---|
| 1591 | MY_FILE_FS_ATTRIBUTE_INFORMATION FsAttrInfo;
|
|---|
| 1592 | char abPadding[sizeof(MY_FILE_FS_VOLUME_INFORMATION) + 512];
|
|---|
| 1593 | } uBuf;
|
|---|
| 1594 | MY_IO_STATUS_BLOCK Ios;
|
|---|
| 1595 | KBOOL fRc;
|
|---|
| 1596 |
|
|---|
| 1597 | kHlpAssert(pDir->hDir == INVALID_HANDLE_VALUE);
|
|---|
| 1598 | pDir->hDir = hDir;
|
|---|
| 1599 |
|
|---|
| 1600 | /* Get the device number. */
|
|---|
| 1601 | rcNt = birdQueryVolumeDeviceNumber(hDir, &uBuf.VolInfo, sizeof(uBuf), &pDir->uDevNo);
|
|---|
| 1602 | kHlpAssertMsg(MY_NT_SUCCESS(rcNt), ("%#x\n", rcNt));
|
|---|
| 1603 |
|
|---|
| 1604 | /* Get the file system. */
|
|---|
| 1605 | pDir->Obj.fFlags &= ~(KFSOBJ_F_NTFS | KFSOBJ_F_WORKING_DIR_MTIME);
|
|---|
| 1606 | Ios.Information = -1;
|
|---|
| 1607 | Ios.u.Status = -1;
|
|---|
| 1608 | rcNt = g_pfnNtQueryVolumeInformationFile(hDir, &Ios, &uBuf.FsAttrInfo, sizeof(uBuf),
|
|---|
| 1609 | MyFileFsAttributeInformation);
|
|---|
| 1610 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1611 | rcNt = Ios.u.Status;
|
|---|
| 1612 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1613 | {
|
|---|
| 1614 | if ( uBuf.FsAttrInfo.FileSystemName[0] == 'N'
|
|---|
| 1615 | && uBuf.FsAttrInfo.FileSystemName[1] == 'T'
|
|---|
| 1616 | && uBuf.FsAttrInfo.FileSystemName[2] == 'F'
|
|---|
| 1617 | && uBuf.FsAttrInfo.FileSystemName[3] == 'S'
|
|---|
| 1618 | && uBuf.FsAttrInfo.FileSystemName[4] == '\0')
|
|---|
| 1619 | {
|
|---|
| 1620 | DWORD dwDriveType = GetDriveTypeW(wszTmp);
|
|---|
| 1621 | if ( dwDriveType == DRIVE_FIXED
|
|---|
| 1622 | || dwDriveType == DRIVE_RAMDISK)
|
|---|
| 1623 | pDir->Obj.fFlags |= KFSOBJ_F_NTFS | KFSOBJ_F_WORKING_DIR_MTIME;
|
|---|
| 1624 | }
|
|---|
| 1625 | }
|
|---|
| 1626 |
|
|---|
| 1627 | /*
|
|---|
| 1628 | * Link the new drive letter into the root dir.
|
|---|
| 1629 | */
|
|---|
| 1630 | fRc = kFsCacheDirAddChild(pCache, &pCache->RootDir, &pDir->Obj, penmError);
|
|---|
| 1631 | kFsCacheObjRelease(pCache, &pDir->Obj);
|
|---|
| 1632 | return fRc ? &pDir->Obj : NULL;
|
|---|
| 1633 | }
|
|---|
| 1634 |
|
|---|
| 1635 | g_pfnNtClose(hDir);
|
|---|
| 1636 | return NULL;
|
|---|
| 1637 | }
|
|---|
| 1638 |
|
|---|
| 1639 | /* Assume it doesn't exist if this happens... This may be a little to
|
|---|
| 1640 | restrictive wrt status code checks. */
|
|---|
| 1641 | kHlpAssertMsgStmtReturn( rcNt == MY_STATUS_OBJECT_NAME_NOT_FOUND
|
|---|
| 1642 | || rcNt == MY_STATUS_OBJECT_PATH_NOT_FOUND
|
|---|
| 1643 | || rcNt == MY_STATUS_OBJECT_PATH_INVALID
|
|---|
| 1644 | || rcNt == MY_STATUS_OBJECT_PATH_SYNTAX_BAD,
|
|---|
| 1645 | ("%#x\n", rcNt),
|
|---|
| 1646 | *penmError = KFSLOOKUPERROR_DIR_OPEN_ERROR,
|
|---|
| 1647 | NULL);
|
|---|
| 1648 | }
|
|---|
| 1649 | else
|
|---|
| 1650 | {
|
|---|
| 1651 | kHlpAssertFailed();
|
|---|
| 1652 | *penmError = KFSLOOKUPERROR_OUT_OF_MEMORY;
|
|---|
| 1653 | return NULL;
|
|---|
| 1654 | }
|
|---|
| 1655 |
|
|---|
| 1656 | /*
|
|---|
| 1657 | * Maybe create a missing entry.
|
|---|
| 1658 | */
|
|---|
| 1659 | if (pCache->fFlags & KFSCACHE_F_MISSING_OBJECTS)
|
|---|
| 1660 | {
|
|---|
| 1661 | PKFSOBJ pMissing = kFsCacheCreateObject(pCache, &pCache->RootDir, szTmp, 2, wszTmp, 2,
|
|---|
| 1662 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1663 | NULL, 0, NULL, 0,
|
|---|
| 1664 | #endif
|
|---|
| 1665 | KFSOBJ_TYPE_MISSING, penmError);
|
|---|
| 1666 | if (pMissing)
|
|---|
| 1667 | {
|
|---|
| 1668 | KBOOL fRc = kFsCacheDirAddChild(pCache, &pCache->RootDir, pMissing, penmError);
|
|---|
| 1669 | kFsCacheObjRelease(pCache, pMissing);
|
|---|
| 1670 | return fRc ? pMissing : NULL;
|
|---|
| 1671 | }
|
|---|
| 1672 | }
|
|---|
| 1673 | else
|
|---|
| 1674 | {
|
|---|
| 1675 | /** @todo this isn't necessary correct for a root spec. */
|
|---|
| 1676 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_FOUND;
|
|---|
| 1677 | }
|
|---|
| 1678 | return NULL;
|
|---|
| 1679 | }
|
|---|
| 1680 |
|
|---|
| 1681 |
|
|---|
| 1682 | /**
|
|---|
| 1683 | * Walk the file system tree for the given absolute path, entering it into the
|
|---|
| 1684 | * hash table.
|
|---|
| 1685 | *
|
|---|
| 1686 | * This will create any missing nodes while walking.
|
|---|
| 1687 | *
|
|---|
| 1688 | * The caller will have to do the path hash table insertion of the result.
|
|---|
| 1689 | *
|
|---|
| 1690 | * @returns Pointer to the tree node corresponding to @a pszPath.
|
|---|
| 1691 | * NULL on lookup failure, see @a penmError for details.
|
|---|
| 1692 | * @param pCache The cache.
|
|---|
| 1693 | * @param pszPath The path to walk.
|
|---|
| 1694 | * @param cchPath The length of the path.
|
|---|
| 1695 | * @param penmError Where to return details as to why the lookup
|
|---|
| 1696 | * failed.
|
|---|
| 1697 | */
|
|---|
| 1698 | static PKFSOBJ kFsCacheLookupAbsoluteA(PKFSCACHE pCache, const char *pszPath, KU32 cchPath, KFSLOOKUPERROR *penmError)
|
|---|
| 1699 | {
|
|---|
| 1700 | PKFSDIR pParent = &pCache->RootDir;
|
|---|
| 1701 | PKFSOBJ pChild;
|
|---|
| 1702 | KU32 off;
|
|---|
| 1703 | char ch;
|
|---|
| 1704 | KU32 cchSlashes;
|
|---|
| 1705 | KU32 offEnd;
|
|---|
| 1706 |
|
|---|
| 1707 | KFSCACHE_LOG(("kFsCacheLookupAbsoluteA(%s)\n", pszPath));
|
|---|
| 1708 |
|
|---|
| 1709 | /*
|
|---|
| 1710 | * The root "directory" needs special handling, so we keep it outside the
|
|---|
| 1711 | * main search loop. (Special: Cannot enumerate it, UNCs, ++.)
|
|---|
| 1712 | */
|
|---|
| 1713 | cchSlashes = 0;
|
|---|
| 1714 | off = 0;
|
|---|
| 1715 | if ( pszPath[1] == ':'
|
|---|
| 1716 | && IS_ALPHA(pszPath[0]))
|
|---|
| 1717 | {
|
|---|
| 1718 | /* Drive letter. */
|
|---|
| 1719 | offEnd = 2;
|
|---|
| 1720 | kHlpAssert(IS_SLASH(pszPath[2]));
|
|---|
| 1721 | pChild = kFswCacheLookupDrive(pCache, toupper(pszPath[0]), penmError);
|
|---|
| 1722 | }
|
|---|
| 1723 | else if ( IS_SLASH(pszPath[0])
|
|---|
| 1724 | && IS_SLASH(pszPath[1]) )
|
|---|
| 1725 | pChild = kFswCacheLookupUncShareA(pCache, pszPath, &offEnd, penmError);
|
|---|
| 1726 | else
|
|---|
| 1727 | {
|
|---|
| 1728 | *penmError = KFSLOOKUPERROR_UNSUPPORTED;
|
|---|
| 1729 | return NULL;
|
|---|
| 1730 | }
|
|---|
| 1731 | if (pChild)
|
|---|
| 1732 | { /* likely */ }
|
|---|
| 1733 | else
|
|---|
| 1734 | return NULL;
|
|---|
| 1735 |
|
|---|
| 1736 | /* Count slashes trailing the root spec. */
|
|---|
| 1737 | if (offEnd < cchPath)
|
|---|
| 1738 | {
|
|---|
| 1739 | kHlpAssert(IS_SLASH(pszPath[offEnd]));
|
|---|
| 1740 | do
|
|---|
| 1741 | cchSlashes++;
|
|---|
| 1742 | while (IS_SLASH(pszPath[offEnd + cchSlashes]));
|
|---|
| 1743 | }
|
|---|
| 1744 |
|
|---|
| 1745 | /* Done already? */
|
|---|
| 1746 | if (offEnd >= cchPath)
|
|---|
| 1747 | {
|
|---|
| 1748 | if ( pChild->uCacheGen == KFSWOBJ_CACHE_GEN_IGNORE
|
|---|
| 1749 | || pChild->uCacheGen == (pChild->bObjType != KFSOBJ_TYPE_MISSING ? pCache->uGeneration : pCache->uGenerationMissing)
|
|---|
| 1750 | || kFsCacheRefreshObj(pCache, pChild, penmError))
|
|---|
| 1751 | return kFsCacheObjRetainInternal(pChild);
|
|---|
| 1752 | return NULL;
|
|---|
| 1753 | }
|
|---|
| 1754 |
|
|---|
| 1755 | /* Check that we've got a valid result and not a cached negative one. */
|
|---|
| 1756 | if (pChild->bObjType == KFSOBJ_TYPE_DIR)
|
|---|
| 1757 | { /* likely */ }
|
|---|
| 1758 | else
|
|---|
| 1759 | {
|
|---|
| 1760 | kHlpAssert(pChild->bObjType == KFSOBJ_TYPE_MISSING);
|
|---|
| 1761 | kHlpAssert(pChild->uCacheGen == KFSWOBJ_CACHE_GEN_IGNORE || pChild->uCacheGen == pCache->uGenerationMissing);
|
|---|
| 1762 | return pChild;
|
|---|
| 1763 | }
|
|---|
| 1764 |
|
|---|
| 1765 | /* Next component. */
|
|---|
| 1766 | pParent = (PKFSDIR)pChild;
|
|---|
| 1767 | off = offEnd + cchSlashes;
|
|---|
| 1768 |
|
|---|
| 1769 |
|
|---|
| 1770 | /*
|
|---|
| 1771 | * Walk loop.
|
|---|
| 1772 | */
|
|---|
| 1773 | for (;;)
|
|---|
| 1774 | {
|
|---|
| 1775 | /*
|
|---|
| 1776 | * Find the end of the component, counting trailing slashes.
|
|---|
| 1777 | */
|
|---|
| 1778 | cchSlashes = 0;
|
|---|
| 1779 | offEnd = off + 1;
|
|---|
| 1780 | while ((ch = pszPath[offEnd]) != '\0')
|
|---|
| 1781 | {
|
|---|
| 1782 | if (!IS_SLASH(ch))
|
|---|
| 1783 | offEnd++;
|
|---|
| 1784 | else
|
|---|
| 1785 | {
|
|---|
| 1786 | do
|
|---|
| 1787 | cchSlashes++;
|
|---|
| 1788 | while (IS_SLASH(pszPath[offEnd + cchSlashes]));
|
|---|
| 1789 | break;
|
|---|
| 1790 | }
|
|---|
| 1791 | }
|
|---|
| 1792 |
|
|---|
| 1793 | /*
|
|---|
| 1794 | * Do we need to populate or refresh this directory first?
|
|---|
| 1795 | */
|
|---|
| 1796 | if ( pParent->fPopulated
|
|---|
| 1797 | && ( pParent->Obj.uCacheGen == KFSWOBJ_CACHE_GEN_IGNORE
|
|---|
| 1798 | || pParent->Obj.uCacheGen == pCache->uGeneration) )
|
|---|
| 1799 | { /* likely */ }
|
|---|
| 1800 | else if (kFsCachePopuplateOrRefreshDir(pCache, pParent, penmError))
|
|---|
| 1801 | { /* likely */ }
|
|---|
| 1802 | else
|
|---|
| 1803 | return NULL;
|
|---|
| 1804 |
|
|---|
| 1805 | /*
|
|---|
| 1806 | * Search the current node for the name.
|
|---|
| 1807 | *
|
|---|
| 1808 | * If we don't find it, we may insert a missing node depending on
|
|---|
| 1809 | * the cache configuration.
|
|---|
| 1810 | */
|
|---|
| 1811 | pChild = kFsCacheFindChildA(pCache, pParent, &pszPath[off], offEnd - off);
|
|---|
| 1812 | if (pChild != NULL)
|
|---|
| 1813 | { /* probably likely */ }
|
|---|
| 1814 | else
|
|---|
| 1815 | {
|
|---|
| 1816 | if (pCache->fFlags & KFSCACHE_F_MISSING_OBJECTS)
|
|---|
| 1817 | pChild = kFsCacheCreateMissingA(pCache, pParent, &pszPath[off], offEnd - off, penmError);
|
|---|
| 1818 | if (cchSlashes == 0 || offEnd + cchSlashes >= cchPath)
|
|---|
| 1819 | {
|
|---|
| 1820 | if (pChild)
|
|---|
| 1821 | return pChild;
|
|---|
| 1822 | *penmError = KFSLOOKUPERROR_NOT_FOUND;
|
|---|
| 1823 | }
|
|---|
| 1824 | else
|
|---|
| 1825 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_FOUND;
|
|---|
| 1826 | return NULL;
|
|---|
| 1827 | }
|
|---|
| 1828 |
|
|---|
| 1829 | /* Advance off and check if we're done already. */
|
|---|
| 1830 | off = offEnd + cchSlashes;
|
|---|
| 1831 | if ( cchSlashes == 0
|
|---|
| 1832 | || off >= cchPath)
|
|---|
| 1833 | {
|
|---|
| 1834 | if ( pChild->bObjType != KFSOBJ_TYPE_MISSING
|
|---|
| 1835 | || pChild->uCacheGen == KFSWOBJ_CACHE_GEN_IGNORE
|
|---|
| 1836 | || pChild->uCacheGen == pCache->uGenerationMissing
|
|---|
| 1837 | || kFsCacheRefreshMissing(pCache, pChild, penmError) )
|
|---|
| 1838 | { /* likely */ }
|
|---|
| 1839 | else
|
|---|
| 1840 | return NULL;
|
|---|
| 1841 | return pChild;
|
|---|
| 1842 | }
|
|---|
| 1843 |
|
|---|
| 1844 | /*
|
|---|
| 1845 | * Check that it's a directory. If a missing entry, we may have to
|
|---|
| 1846 | * refresh it and re-examin it.
|
|---|
| 1847 | */
|
|---|
| 1848 | if (pChild->bObjType == KFSOBJ_TYPE_DIR)
|
|---|
| 1849 | pParent = (PKFSDIR)pChild;
|
|---|
| 1850 | else if (pChild->bObjType != KFSOBJ_TYPE_MISSING)
|
|---|
| 1851 | {
|
|---|
| 1852 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_DIR;
|
|---|
| 1853 | return NULL;
|
|---|
| 1854 | }
|
|---|
| 1855 | else if ( pChild->uCacheGen == KFSWOBJ_CACHE_GEN_IGNORE
|
|---|
| 1856 | || pChild->uCacheGen == pCache->uGenerationMissing)
|
|---|
| 1857 | {
|
|---|
| 1858 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_FOUND;
|
|---|
| 1859 | return NULL;
|
|---|
| 1860 | }
|
|---|
| 1861 | else if (kFsCacheRefreshMissingIntermediateDir(pCache, pChild, penmError))
|
|---|
| 1862 | pParent = (PKFSDIR)pChild;
|
|---|
| 1863 | else
|
|---|
| 1864 | return NULL;
|
|---|
| 1865 | }
|
|---|
| 1866 |
|
|---|
| 1867 | return NULL;
|
|---|
| 1868 | }
|
|---|
| 1869 |
|
|---|
| 1870 |
|
|---|
| 1871 | /**
|
|---|
| 1872 | * This deals with paths that are relative and paths that contains '..'
|
|---|
| 1873 | * elements.
|
|---|
| 1874 | *
|
|---|
| 1875 | * @returns Pointer to object corresponding to @a pszPath on success.
|
|---|
| 1876 | * NULL if this isn't a path we care to cache.
|
|---|
| 1877 | *
|
|---|
| 1878 | * @param pCache The cache.
|
|---|
| 1879 | * @param pszPath The path.
|
|---|
| 1880 | * @param cchPath The length of the path.
|
|---|
| 1881 | * @param penmError Where to return details as to why the lookup
|
|---|
| 1882 | * failed.
|
|---|
| 1883 | */
|
|---|
| 1884 | static PKFSOBJ kFsCacheLookupSlowA(PKFSCACHE pCache, const char *pszPath, KU32 cchPath, KFSLOOKUPERROR *penmError)
|
|---|
| 1885 | {
|
|---|
| 1886 | /*
|
|---|
| 1887 | * We just call GetFullPathNameA here to do the job as getcwd and _getdcwd
|
|---|
| 1888 | * ends up calling it anyway.
|
|---|
| 1889 | */
|
|---|
| 1890 | char szFull[KFSCACHE_CFG_MAX_PATH];
|
|---|
| 1891 | UINT cchFull = GetFullPathNameA(pszPath, sizeof(szFull), szFull, NULL);
|
|---|
| 1892 | if ( cchFull >= 3
|
|---|
| 1893 | && cchFull < sizeof(szFull))
|
|---|
| 1894 | {
|
|---|
| 1895 | PKFSOBJ pFsObj;
|
|---|
| 1896 | KFSCACHE_LOG(("kFsCacheLookupSlowA(%s)\n", pszPath));
|
|---|
| 1897 | pFsObj = kFsCacheLookupAbsoluteA(pCache, szFull, cchFull, penmError);
|
|---|
| 1898 |
|
|---|
| 1899 | #if 0 /* No need to do this until it's actually queried. */
|
|---|
| 1900 | /* Cache the resulting path. */
|
|---|
| 1901 | if ( pFsObj
|
|---|
| 1902 | || (pCache->fFlags & KFSCACHE_F_MISSING_PATHS)
|
|---|
| 1903 | || *penmError == KFSLOOKUPERROR_UNSUPPORTED)
|
|---|
| 1904 | {
|
|---|
| 1905 | KU32 uHashPath = kFsCacheStrHash(szFull);
|
|---|
| 1906 | kFsCacheCreatePathHashTabEntryA(pCache, pFsObj, pszPath, cchPath, uHashPath,
|
|---|
| 1907 | uHashPath % K_ELEMENTS(pCache->apAnsiPaths), *penmError);
|
|---|
| 1908 | }
|
|---|
| 1909 | #endif
|
|---|
| 1910 | return pFsObj;
|
|---|
| 1911 | }
|
|---|
| 1912 |
|
|---|
| 1913 | /* The path is too long! */
|
|---|
| 1914 | kHlpAssertMsgFailed(("'%s' -> cchFull=%u\n", pszPath, cchFull));
|
|---|
| 1915 | *penmError = KFSLOOKUPERROR_PATH_TOO_LONG;
|
|---|
| 1916 | return NULL;
|
|---|
| 1917 | }
|
|---|
| 1918 |
|
|---|
| 1919 |
|
|---|
| 1920 | /**
|
|---|
| 1921 | * Looks up a KFSOBJ for the given ANSI path.
|
|---|
| 1922 | *
|
|---|
| 1923 | * This will first try the hash table. If not in the hash table, the file
|
|---|
| 1924 | * system cache tree is walked, missing bits filled in and finally a hash table
|
|---|
| 1925 | * entry is created.
|
|---|
| 1926 | *
|
|---|
| 1927 | * Only drive letter paths are cachable. We don't do any UNC paths at this
|
|---|
| 1928 | * point.
|
|---|
| 1929 | *
|
|---|
| 1930 | * @returns Reference to object corresponding to @a pszPath on success, this
|
|---|
| 1931 | * must be released by kwFsCacheRelease.
|
|---|
| 1932 | * NULL if not a path we care to cache.
|
|---|
| 1933 | * @param pCache The cache.
|
|---|
| 1934 | * @param pszPath The path to lookup.
|
|---|
| 1935 | * @param penmError Where to return details as to why the lookup
|
|---|
| 1936 | * failed.
|
|---|
| 1937 | */
|
|---|
| 1938 | static PKFSOBJ kFsCacheLookupA(PKFSCACHE pCache, const char *pszPath, KFSLOOKUPERROR *penmError)
|
|---|
| 1939 | {
|
|---|
| 1940 | /*
|
|---|
| 1941 | * Do hash table lookup of the path.
|
|---|
| 1942 | */
|
|---|
| 1943 | KU32 uHashPath;
|
|---|
| 1944 | KU32 cchPath = (KU32)kFsCacheStrHashEx(pszPath, &uHashPath);
|
|---|
| 1945 | KU32 idxHashTab = uHashPath % K_ELEMENTS(pCache->apAnsiPaths);
|
|---|
| 1946 | PKFSHASHA pHashEntry = pCache->apAnsiPaths[idxHashTab];
|
|---|
| 1947 | if (pHashEntry)
|
|---|
| 1948 | {
|
|---|
| 1949 | do
|
|---|
| 1950 | {
|
|---|
| 1951 | if ( pHashEntry->uHashPath == uHashPath
|
|---|
| 1952 | && pHashEntry->cchPath == cchPath
|
|---|
| 1953 | && kHlpMemComp(pHashEntry->pszPath, pszPath, cchPath) == 0)
|
|---|
| 1954 | {
|
|---|
| 1955 | if ( pHashEntry->uCacheGen == KFSWOBJ_CACHE_GEN_IGNORE
|
|---|
| 1956 | || pHashEntry->uCacheGen == pCache->uGeneration
|
|---|
| 1957 | || (pHashEntry = kFsCacheRefreshPathA(pCache, pHashEntry, idxHashTab)) )
|
|---|
| 1958 | {
|
|---|
| 1959 | pCache->cLookups++;
|
|---|
| 1960 | pCache->cPathHashHits++;
|
|---|
| 1961 | KFSCACHE_LOG(("kFsCacheLookupA(%s) - hit %p\n", pszPath, pHashEntry->pFsObj));
|
|---|
| 1962 | *penmError = pHashEntry->enmError;
|
|---|
| 1963 | if (pHashEntry->pFsObj)
|
|---|
| 1964 | return kFsCacheObjRetainInternal(pHashEntry->pFsObj);
|
|---|
| 1965 | return NULL;
|
|---|
| 1966 | }
|
|---|
| 1967 | break;
|
|---|
| 1968 | }
|
|---|
| 1969 | pHashEntry = pHashEntry->pNext;
|
|---|
| 1970 | } while (pHashEntry);
|
|---|
| 1971 | }
|
|---|
| 1972 |
|
|---|
| 1973 | /*
|
|---|
| 1974 | * Create an entry for it by walking the file system cache and filling in the blanks.
|
|---|
| 1975 | */
|
|---|
| 1976 | if ( cchPath > 0
|
|---|
| 1977 | && cchPath < KFSCACHE_CFG_MAX_PATH)
|
|---|
| 1978 | {
|
|---|
| 1979 | PKFSOBJ pFsObj;
|
|---|
| 1980 |
|
|---|
| 1981 | /* Is absolute without any '..' bits? */
|
|---|
| 1982 | if ( cchPath >= 3
|
|---|
| 1983 | && ( ( pszPath[1] == ':' /* Drive letter */
|
|---|
| 1984 | && IS_SLASH(pszPath[2])
|
|---|
| 1985 | && IS_ALPHA(pszPath[0]) )
|
|---|
| 1986 | || ( IS_SLASH(pszPath[0]) /* UNC */
|
|---|
| 1987 | && IS_SLASH(pszPath[1]) ) )
|
|---|
| 1988 | && !kFsCacheHasDotDot(pszPath, cchPath) )
|
|---|
| 1989 | pFsObj = kFsCacheLookupAbsoluteA(pCache, pszPath, cchPath, penmError);
|
|---|
| 1990 | else
|
|---|
| 1991 | pFsObj = kFsCacheLookupSlowA(pCache, pszPath, cchPath, penmError);
|
|---|
| 1992 | if ( pFsObj
|
|---|
| 1993 | || ( (pCache->fFlags & KFSCACHE_F_MISSING_PATHS)
|
|---|
| 1994 | && *penmError != KFSLOOKUPERROR_PATH_TOO_LONG)
|
|---|
| 1995 | || *penmError == KFSLOOKUPERROR_UNSUPPORTED )
|
|---|
| 1996 | kFsCacheCreatePathHashTabEntryA(pCache, pFsObj, pszPath, cchPath, uHashPath, idxHashTab, *penmError);
|
|---|
| 1997 |
|
|---|
| 1998 | pCache->cLookups++;
|
|---|
| 1999 | if (pFsObj)
|
|---|
| 2000 | pCache->cWalkHits++;
|
|---|
| 2001 | return pFsObj;
|
|---|
| 2002 | }
|
|---|
| 2003 |
|
|---|
| 2004 | *penmError = KFSLOOKUPERROR_PATH_TOO_LONG;
|
|---|
| 2005 | return NULL;
|
|---|
| 2006 | }
|
|---|
| 2007 |
|
|---|
| 2008 |
|
|---|
| 2009 | /**
|
|---|
| 2010 | * Destroys a cache object which has a zero reference count.
|
|---|
| 2011 | *
|
|---|
| 2012 | * @returns 0
|
|---|
| 2013 | * @param pCache The cache.
|
|---|
| 2014 | * @param pObj The object.
|
|---|
| 2015 | */
|
|---|
| 2016 | KU32 kFsCacheObjDestroy(PKFSCACHE pCache, PKFSOBJ pObj)
|
|---|
| 2017 | {
|
|---|
| 2018 | kHlpAssert(pObj->cRefs == 0);
|
|---|
| 2019 | kHlpAssert(pObj->pParent == NULL);
|
|---|
| 2020 |
|
|---|
| 2021 | switch (pObj->bObjType)
|
|---|
| 2022 | {
|
|---|
| 2023 | case KFSOBJ_TYPE_MISSING:
|
|---|
| 2024 | //case KFSOBJ_TYPE_MISSING | KFSOBJ_TYPE_F_INVALID:
|
|---|
| 2025 | /* nothing else to do here */
|
|---|
| 2026 | pCache->cbObjects -= sizeof(*pObj);
|
|---|
| 2027 | break;
|
|---|
| 2028 |
|
|---|
| 2029 | case KFSOBJ_TYPE_DIR:
|
|---|
| 2030 | //case KFSOBJ_TYPE_DIR | KFSOBJ_TYPE_F_INVALID:
|
|---|
| 2031 | case KFSOBJ_TYPE_FILE:
|
|---|
| 2032 | //case KFSOBJ_TYPE_FILE | KFSOBJ_TYPE_F_INVALID:
|
|---|
| 2033 | kHlpAssertFailed();
|
|---|
| 2034 | break;
|
|---|
| 2035 | default:
|
|---|
| 2036 | kHlpAssertFailed();
|
|---|
| 2037 | }
|
|---|
| 2038 | pCache->cObjects--;
|
|---|
| 2039 | free(pObj);
|
|---|
| 2040 | return 0;
|
|---|
| 2041 | }
|
|---|
| 2042 |
|
|---|
| 2043 |
|
|---|
| 2044 | /**
|
|---|
| 2045 | * Releases a reference to a cache object.
|
|---|
| 2046 | *
|
|---|
| 2047 | * @returns New reference count.
|
|---|
| 2048 | * @param pCache The cache.
|
|---|
| 2049 | * @param pObj The object.
|
|---|
| 2050 | */
|
|---|
| 2051 | KU32 kFsCacheObjRelease(PKFSCACHE pCache, PKFSOBJ pObj)
|
|---|
| 2052 | {
|
|---|
| 2053 | KU32 cRefs = --pObj->cRefs;
|
|---|
| 2054 | if (cRefs)
|
|---|
| 2055 | return cRefs;
|
|---|
| 2056 | return kFsCacheObjDestroy(pCache, pObj);
|
|---|
| 2057 | }
|
|---|
| 2058 |
|
|---|
| 2059 |
|
|---|
| 2060 | /**
|
|---|
| 2061 | * Retains a reference to a cahce object.
|
|---|
| 2062 | *
|
|---|
| 2063 | * @returns New reference count.
|
|---|
| 2064 | * @param pObj The object.
|
|---|
| 2065 | */
|
|---|
| 2066 | KU32 kFsCacheObjRetain(PKFSOBJ pObj)
|
|---|
| 2067 | {
|
|---|
| 2068 | KU32 cRefs = ++pObj->cRefs;
|
|---|
| 2069 | kHlpAssert(cRefs < 16384);
|
|---|
| 2070 | return cRefs;
|
|---|
| 2071 | }
|
|---|
| 2072 |
|
|---|
| 2073 |
|
|---|
| 2074 |
|
|---|
| 2075 | PKFSCACHE kFsCacheCreate(KU32 fFlags)
|
|---|
| 2076 | {
|
|---|
| 2077 | PKFSCACHE pCache;
|
|---|
| 2078 | birdResolveImports();
|
|---|
| 2079 |
|
|---|
| 2080 | pCache = (PKFSCACHE)kHlpAllocZ(sizeof(*pCache));
|
|---|
| 2081 | if (pCache)
|
|---|
| 2082 | {
|
|---|
| 2083 | /* Dummy root dir entry. */
|
|---|
| 2084 | pCache->RootDir.Obj.u32Magic = KFSOBJ_MAGIC;
|
|---|
| 2085 | pCache->RootDir.Obj.cRefs = 1;
|
|---|
| 2086 | pCache->RootDir.Obj.uCacheGen = KFSWOBJ_CACHE_GEN_IGNORE;
|
|---|
| 2087 | pCache->RootDir.Obj.bObjType = KFSOBJ_TYPE_DIR;
|
|---|
| 2088 | pCache->RootDir.Obj.fHaveStats = K_FALSE;
|
|---|
| 2089 | pCache->RootDir.Obj.pParent = NULL;
|
|---|
| 2090 | pCache->RootDir.Obj.pszName = "";
|
|---|
| 2091 | pCache->RootDir.Obj.cchName = 0;
|
|---|
| 2092 | pCache->RootDir.Obj.cchParent = 0;
|
|---|
| 2093 | #ifdef KFSCACHE_CFG_UTF16
|
|---|
| 2094 | pCache->RootDir.Obj.cwcName = 0;
|
|---|
| 2095 | pCache->RootDir.Obj.cwcParent = 0;
|
|---|
| 2096 | pCache->RootDir.Obj.pwszName = L"";
|
|---|
| 2097 | #endif
|
|---|
| 2098 |
|
|---|
| 2099 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 2100 | pCache->RootDir.Obj.pszShortName = NULL;
|
|---|
| 2101 | pCache->RootDir.Obj.cchShortName = 0;
|
|---|
| 2102 | pCache->RootDir.Obj.cchShortParent = 0;
|
|---|
| 2103 | # ifdef KFSCACHE_CFG_UTF16
|
|---|
| 2104 | pCache->RootDir.Obj.cwcShortName;
|
|---|
| 2105 | pCache->RootDir.Obj.cwcShortParent;
|
|---|
| 2106 | pCache->RootDir.Obj.pwszShortName;
|
|---|
| 2107 | # endif
|
|---|
| 2108 | #endif
|
|---|
| 2109 | pCache->RootDir.cChildren = 0;
|
|---|
| 2110 | pCache->RootDir.papChildren = NULL;
|
|---|
| 2111 | pCache->RootDir.hDir = INVALID_HANDLE_VALUE;
|
|---|
| 2112 | pCache->RootDir.cHashTab = 251;
|
|---|
| 2113 | pCache->RootDir.paHashTab = (PKFSOBJHASH)kHlpAllocZ( pCache->RootDir.cHashTab
|
|---|
| 2114 | * sizeof(pCache->RootDir.paHashTab[0]));
|
|---|
| 2115 | if (pCache->RootDir.paHashTab)
|
|---|
| 2116 | {
|
|---|
| 2117 | /* The cache itself. */
|
|---|
| 2118 | pCache->u32Magic = KFSCACHE_MAGIC;
|
|---|
| 2119 | pCache->fFlags = fFlags;
|
|---|
| 2120 | pCache->uGeneration = 1;
|
|---|
| 2121 | pCache->cObjects = 1;
|
|---|
| 2122 | pCache->cbObjects = sizeof(pCache->RootDir) + pCache->RootDir.cHashTab * sizeof(pCache->RootDir.paHashTab[0]);
|
|---|
| 2123 | pCache->cPathHashHits = 0;
|
|---|
| 2124 | pCache->cWalkHits = 0;
|
|---|
| 2125 | pCache->cAnsiPaths = 0;
|
|---|
| 2126 | pCache->cAnsiPathCollisions = 0;
|
|---|
| 2127 | pCache->cbAnsiPaths = 0;
|
|---|
| 2128 | #ifdef KFSCACHE_CFG_UTF16
|
|---|
| 2129 | pCache->cUtf16Paths = 0;
|
|---|
| 2130 | pCache->cUtf16PathCollisions = 0;
|
|---|
| 2131 | pCache->cbUtf16Paths = 0;
|
|---|
| 2132 | #endif
|
|---|
| 2133 | return pCache;
|
|---|
| 2134 | }
|
|---|
| 2135 |
|
|---|
| 2136 | kHlpFree(pCache);
|
|---|
| 2137 | }
|
|---|
| 2138 | return NULL;
|
|---|
| 2139 | }
|
|---|
| 2140 |
|
|---|