| 1 | /* $Id: ntdircache.c 2852 2016-08-31 20:46:34Z 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 <mbstring.h>
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| 42 | #include <wchar.h>
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| 43 | //#include <intrin.h>
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| 44 | //#include <setjmp.h>
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| 45 | //#include <ctype.h>
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| 46 |
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| 47 |
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| 48 | //#include <Windows.h>
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| 49 | //#include <winternl.h>
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| 50 |
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| 51 |
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| 52 |
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| 53 | /*********************************************************************************************************************************
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| 54 | * Defined Constants And Macros *
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| 55 | *********************************************************************************************************************************/
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| 56 | /** @def KFSCACHE_CFG_UTF16
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| 57 | * Whether to compile in the UTF-16 names support. */
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| 58 | #define KFSCACHE_CFG_UTF16 1
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| 59 | /** @def KFSCACHE_CFG_SHORT_NAMES
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| 60 | * Whether to compile in the short name support. */
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| 61 | #define KFSCACHE_CFG_SHORT_NAMES 1
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| 62 | /** @def KFSCACHE_CFG_PATH_HASH_TAB_SIZE
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| 63 | * Size of the path hash table. */
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| 64 | #define KFSCACHE_CFG_PATH_HASH_TAB_SIZE 16381
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| 65 | /** The max length paths we consider. */
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| 66 | #define KFSCACHE_CFG_MAX_PATH 1024
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| 67 | /** The max ANSI name length. */
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| 68 | #define KFSCACHE_CFG_MAX_ANSI_NAME (256*3 + 16)
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| 69 | /** The max UTF-16 name length. */
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| 70 | #define KFSCACHE_CFG_MAX_UTF16_NAME (256*2 + 16)
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| 71 |
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| 72 |
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| 73 |
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| 74 | /** Special KFSOBJ::uCacheGen number indicating that it does not apply. */
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| 75 | #define KFSWOBJ_CACHE_GEN_IGNORE KU32_MAX
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| 76 |
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| 77 | /** @def KW_LOG
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| 78 | * Generic logging.
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| 79 | * @param a Argument list for kFsCacheDbgPrintf */
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| 80 | #ifndef NDEBUG
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| 81 | # define KFSCACHE_LOG(a) kFsCacheDbgPrintf a
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| 82 | #else
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| 83 | # define KFSCACHE_LOG(a) do { } while (0)
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| 84 | #endif
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| 85 |
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| 86 |
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| 87 | /** @name KFSOBJ_TYPE_XXX - KFSOBJ::bObjType
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| 88 | * @{ */
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| 89 | /** Directory, type KFSDIR. */
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| 90 | #define KFSOBJ_TYPE_DIR KU8_C(0x01)
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| 91 | /** Regular file - type KFSOBJ. */
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| 92 | #define KFSOBJ_TYPE_FILE KU8_C(0x02)
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| 93 | /** Other file - type KFSOBJ. */
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| 94 | #define KFSOBJ_TYPE_OTHER KU8_C(0x03)
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| 95 | /** Caching of a negative result - type KFSOBJ.
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| 96 | * @remarks We will allocate enough space for the largest cache node, so this
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| 97 | * can metamorph into any other object should it actually turn up. */
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| 98 | #define KFSOBJ_TYPE_MISSING KU8_C(0x04)
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| 99 | ///** Invalidated entry flag. */
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| 100 | //#define KFSOBJ_TYPE_F_INVALID KU8_C(0x20)
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| 101 | /** @} */
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| 102 |
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| 103 | /** @name KFSOBJ_F_XXX - KFSOBJ::fFlags
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| 104 | * @{ */
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| 105 | /** Whether the file system update the modified timestamp of directories
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| 106 | * when something is removed from it or added to it.
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| 107 | * @remarks They say NTFS is the only windows filesystem doing this. */
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| 108 | #define KFSOBJ_F_WORKING_DIR_MTIME KU32_C(0x00000001)
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| 109 | /** NTFS file system volume. */
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| 110 | #define KFSOBJ_F_NTFS KU32_C(0x80000000)
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| 111 | /** @} */
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| 112 |
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| 113 |
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| 114 | #define IS_ALPHA(ch) ( ((ch) >= 'A' && (ch) <= 'Z') || ((ch) >= 'a' && (ch) <= 'z') )
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| 115 | #define IS_SLASH(ch) ((ch) == '\\' || (ch) == '/')
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| 116 |
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| 117 |
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| 118 | /*********************************************************************************************************************************
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| 119 | * Structures and Typedefs *
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| 120 | *********************************************************************************************************************************/
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| 121 | /** Pointer to a core object. */
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| 122 | typedef struct KFSOBJ *PKFSOBJ;
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| 123 | /** Pointer to a directory object. */
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| 124 | typedef struct KFSDIR *PKFSDIR;
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| 125 | /** Pointer to a directory hash table entry. */
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| 126 | typedef struct KFSOBJHASH *PKFSOBJHASH;
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| 127 |
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| 128 |
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| 129 | /**
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| 130 | * Directory hash table entry.
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| 131 | *
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| 132 | * There can be two of these per directory entry when the short name differs
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| 133 | * from the long name.
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| 134 | */
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| 135 | typedef struct KFSOBJHASH
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| 136 | {
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| 137 | /** Pointer to the next entry with the same hash. */
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| 138 | PKFSOBJHASH pNext;
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| 139 | /** Pointer to the object. */
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| 140 | PKFSOBJ pObj;
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| 141 | } KFSOBJHASH;
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| 142 |
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| 143 |
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| 144 | /**
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| 145 | * Base cache node.
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| 146 | */
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| 147 | typedef struct KFSOBJ
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| 148 | {
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| 149 | /** Magic value (KFSOBJ_MAGIC). */
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| 150 | KU32 u32Magic;
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| 151 | /** Number of references. */
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| 152 | KU32 volatile cRefs;
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| 153 | /** The cache generation, see KFSWOBJ_CACHE_GEN_IGNORE. */
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| 154 | KU32 uCacheGen;
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| 155 | /** The object type, KFSOBJ_TYPE_XXX. */
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| 156 | KU8 bObjType;
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| 157 | /** Set if the Stats member is valid, clear if not. */
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| 158 | KBOOL fHaveStats;
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| 159 | /** Unused flags. */
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| 160 | KBOOL abUnused[2];
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| 161 | /** Flags, KFSOBJ_F_XXX. */
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| 162 | KU32 fFlags;
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| 163 |
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| 164 | /** Pointer to the parent (directory).
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| 165 | * This is only NULL for a root. */
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| 166 | PKFSDIR pParent;
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| 167 |
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| 168 | /** The directory name. (Allocated after the structure.) */
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| 169 | const char *pszName;
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| 170 | /** The length of pszName. */
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| 171 | KU16 cchName;
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| 172 | /** The length of the parent path (up to where pszName starts).
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| 173 | * @note This is valuable when constructing an absolute path to this node by
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| 174 | * means of the parent pointer (no need for recursion). */
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| 175 | KU16 cchParent;
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| 176 | #ifdef KFSCACHE_CFG_UTF16
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| 177 | /** The length of pwszName (in wchar_t's). */
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| 178 | KU16 cwcName;
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| 179 | /** The length of the parent UTF-16 path (in wchar_t's).
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| 180 | * @note This is valuable when constructing an absolute path to this node by
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| 181 | * means of the parent pointer (no need for recursion). */
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| 182 | KU16 cwcParent;
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| 183 | /** The UTF-16 object name. (Allocated after the structure.) */
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| 184 | const wchar_t *pwszName;
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| 185 | #endif
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| 186 |
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| 187 | #ifdef KFSCACHE_CFG_SHORT_NAMES
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| 188 | /** The short object name. (Allocated after the structure, could be same
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| 189 | * as pszName.) */
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| 190 | const char *pszShortName;
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| 191 | /** The length of pszShortName. */
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| 192 | KU16 cchShortName;
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| 193 | /** The length of the short parent path (up to where pszShortName starts). */
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| 194 | KU16 cchShortParent;
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| 195 | # ifdef KFSCACHE_CFG_UTF16
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| 196 | /** The length of pwszShortName (in wchar_t's). */
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| 197 | KU16 cwcShortName;
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| 198 | /** The length of the short parent UTF-16 path (in wchar_t's). */
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| 199 | KU16 cwcShortParent;
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| 200 | /** The UTF-16 short object name. (Allocated after the structure, possibly
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| 201 | * same as pwszName.) */
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| 202 | const wchar_t *pwszShortName;
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| 203 | # endif
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| 204 | #endif
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| 205 |
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| 206 | /** Stats - only valid when fHaveStats is set. */
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| 207 | BirdStat_T Stats;
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| 208 | } KFSOBJ;
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| 209 |
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| 210 | /** The magic for a KFSOBJ structure (Thelonious Sphere Monk). */
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| 211 | #define KFSOBJ_MAGIC KU32_C(0x19171010)
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| 212 |
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| 213 |
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| 214 | /**
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| 215 | * Directory node in the cache.
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| 216 | */
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| 217 | typedef struct KFSDIR
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| 218 | {
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| 219 | /** The core object information. */
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| 220 | KFSOBJ Obj;
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| 221 |
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| 222 | /** Child objects. */
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| 223 | PKFSOBJ *papChildren;
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| 224 | /** The number of child objects. */
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| 225 | KU32 cChildren;
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| 226 |
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| 227 | /** The size of the hash table.
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| 228 | * @remarks The hash table is optional and only used when there are a lot of
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| 229 | * entries in the directory. */
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| 230 | KU32 cHashTab;
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| 231 | /** Pointer to the hash table.
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| 232 | * @todo this isn't quite there yet, structure wise. sigh. */
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| 233 | PKFSOBJHASH paHashTab;
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| 234 |
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| 235 | /** Handle to the directory (we generally keep it open). */
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| 236 | HANDLE hDir;
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| 237 | /** The device number we queried/inherited when opening it. */
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| 238 | KU64 uDevNo;
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| 239 |
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| 240 | /** Set if populated. */
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| 241 | KBOOL fPopulated;
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| 242 | } KFSDIR;
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| 243 |
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| 244 |
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| 245 | /**
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| 246 | * Lookup errors.
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| 247 | */
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| 248 | typedef enum KFSLOOKUPERROR
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| 249 | {
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| 250 | /** Lookup was a success. */
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| 251 | KFSLOOKUPERROR_SUCCESS = 0,
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| 252 | /** A path component was not found. */
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| 253 | KFSLOOKUPERROR_PATH_COMP_NOT_FOUND,
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| 254 | /** A path component is not a directory. */
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| 255 | KFSLOOKUPERROR_PATH_COMP_NOT_DIR,
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| 256 | /** The final path entry is not a directory (trailing slash). */
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| 257 | KFSLOOKUPERROR_NOT_DIR,
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| 258 | /** Not found. */
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| 259 | KFSLOOKUPERROR_NOT_FOUND,
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| 260 | /** The path is too long. */
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| 261 | KFSLOOKUPERROR_PATH_TOO_LONG,
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| 262 | /** Unsupported path type. */
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| 263 | KFSLOOKUPERROR_UNSUPPORTED,
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| 264 | /** We're out of memory. */
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| 265 | KFSLOOKUPERROR_OUT_OF_MEMORY,
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| 266 |
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| 267 | /** Error opening directory. */
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| 268 | KFSLOOKUPERROR_DIR_OPEN_ERROR,
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| 269 | /** Error reading directory. */
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| 270 | KFSLOOKUPERROR_DIR_READ_ERROR,
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| 271 | /** UTF-16 to ANSI conversion error. */
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| 272 | KFSLOOKUPERROR_ANSI_CONVERSION_ERROR,
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| 273 | /** ANSI to UTF-16 conversion error. */
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| 274 | KFSLOOKUPERROR_UTF16_CONVERSION_ERROR,
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| 275 | /** Internal error. */
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| 276 | KFSLOOKUPERROR_INTERNAL_ERROR
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| 277 | } KFSLOOKUPERROR;
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| 278 |
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| 279 |
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| 280 | /** Pointer to an ANSI path hash table entry. */
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| 281 | typedef struct KFSHASHA *PKFSHASHA;
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| 282 | /**
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| 283 | * ANSI file system path hash table entry.
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| 284 | * The path hash table allows us to skip parsing and walking a path.
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| 285 | */
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| 286 | typedef struct KFSHASHA
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| 287 | {
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| 288 | /** Next entry with the same hash table slot. */
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| 289 | PKFSHASHA pNext;
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| 290 | /** Path hash value. */
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| 291 | KU32 uHashPath;
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| 292 | /** The path length. */
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| 293 | KU32 cchPath;
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| 294 | /** The cache generation ID. */
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| 295 | KU32 uCacheGen;
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| 296 | /** The lookup error (when pFsObj is NULL). */
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| 297 | KFSLOOKUPERROR enmError;
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| 298 | /** The path. (Allocated after the structure.) */
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| 299 | const char *pszPath;
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| 300 | /** Pointer to the matching FS object.
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| 301 | * This is NULL for negative path entries? */
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| 302 | PKFSOBJ pFsObj;
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| 303 | } KFSHASHA;
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| 304 |
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| 305 |
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| 306 | #ifdef KFSCACHE_CFG_UTF16
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| 307 | /** Pointer to an UTF-16 path hash table entry. */
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| 308 | typedef struct KFSHASHW *PKFSHASHW;
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| 309 | /**
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| 310 | * UTF-16 file system path hash table entry. The path hash table allows us
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| 311 | * to skip parsing and walking a path.
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| 312 | */
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| 313 | typedef struct KFSHASHW
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| 314 | {
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| 315 | /** Next entry with the same hash table slot. */
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| 316 | PKFSHASHW pNext;
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| 317 | /** Path hash value. */
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| 318 | KU32 uHashPath;
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| 319 | /** The path length (in wchar_t units). */
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| 320 | KU32 cwcPath;
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| 321 | /** The cache generation ID. */
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| 322 | KU32 uCacheGen;
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| 323 | /** The lookup error (when pFsObj is NULL). */
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| 324 | KFSLOOKUPERROR enmError;
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| 325 | /** The path. (Allocated after the structure.) */
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| 326 | const wchar_t *pwszPath;
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| 327 | /** Pointer to the matching FS object.
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| 328 | * This is NULL for negative path entries? */
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| 329 | PKFSOBJ pFsObj;
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| 330 | } KFSHASHW;
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| 331 | #endif
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| 332 |
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| 333 |
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| 334 | /** @name KFSCACHE_F_XXX
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| 335 | * @{ */
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| 336 | /** Whether to cache missing directory entries (KFSOBJ_TYPE_MISSING). */
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| 337 | #define KFSCACHE_F_MISSING_OBJECTS KU32_C(0x00000001)
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| 338 | /** Whether to cache missing paths. */
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| 339 | #define KFSCACHE_F_MISSING_PATHS KU32_C(0x00000002)
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| 340 | /** @} */
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| 341 |
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| 342 |
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| 343 | /** Pointer to a cache. */
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| 344 | typedef struct KFSCACHE *PKFSCACHE;
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| 345 | /**
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| 346 | * Directory cache instance.
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| 347 | */
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| 348 | typedef struct KFSCACHE
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| 349 | {
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| 350 | /** Magic value (KFSCACHE_MAGIC). */
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| 351 | KU32 u32Magic;
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| 352 | /** Cache flags. */
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| 353 | KU32 fFlags;
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| 354 |
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| 355 | /** The current cache generation for objects that already exists. */
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| 356 | KU32 uGeneration;
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| 357 | /** The current cache generation for missing objects, negative results, ++. */
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| 358 | KU32 uGenerationMissing;
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| 359 |
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| 360 | /** Number of cache objects. */
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| 361 | KSIZE cObjects;
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| 362 | /** Memory occupied by the cache object structures. */
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| 363 | KSIZE cbObjects;
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| 364 | /** Number of lookups. */
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| 365 | KSIZE cLookups;
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| 366 | /** Number of hits in the path hash tables. */
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| 367 | KSIZE cPathHashHits;
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| 368 | /** Number of hits walking the file system hierarchy. */
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| 369 | KSIZE cWalkHits;
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| 370 |
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| 371 | /** The root directory. */
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| 372 | KFSDIR RootDir;
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| 373 |
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| 374 | /** File system hash table for ANSI filename strings. */
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| 375 | PKFSHASHA apAnsiPaths[KFSCACHE_CFG_PATH_HASH_TAB_SIZE];
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| 376 | /** Number of paths in the apAnsiPaths hash table. */
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| 377 | KSIZE cAnsiPaths;
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| 378 | /** Number of collisions in the apAnsiPaths hash table. */
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| 379 | KSIZE cAnsiPathCollisions;
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| 380 | /** Amount of memory used by the path entries. */
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| 381 | KSIZE cbAnsiPaths;
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| 382 |
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| 383 | #ifdef KFSCACHE_CFG_UTF16
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| 384 | /** Number of paths in the apUtf16Paths hash table. */
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| 385 | KSIZE cUtf16Paths;
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| 386 | /** Number of collisions in the apUtf16Paths hash table. */
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| 387 | KSIZE cUtf16PathCollisions;
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| 388 | /** Amount of memory used by the UTF-16 path entries. */
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| 389 | KSIZE cbUtf16Paths;
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| 390 | /** File system hash table for UTF-16 filename strings. */
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| 391 | PKFSHASHW apUtf16Paths[KFSCACHE_CFG_PATH_HASH_TAB_SIZE];
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| 392 | #endif
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| 393 | } KFSCACHE;
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| 394 |
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| 395 | /** Magic value for KFSCACHE::u32Magic (Jon Batiste). */
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| 396 | #define KFSCACHE_MAGIC KU32_C(0x19861111)
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| 397 |
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| 398 |
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| 399 | /*********************************************************************************************************************************
|
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| 400 | * Internal Functions *
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| 401 | *********************************************************************************************************************************/
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| 402 | KU32 kFsCacheObjRelease(PKFSCACHE pCache, PKFSOBJ pObj);
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| 403 |
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| 404 |
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| 405 | /**
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| 406 | * Retains a reference to a cache object, internal version.
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| 407 | *
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| 408 | * @returns pObj
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| 409 | * @param pObj The object.
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| 410 | */
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| 411 | K_INLINE PKFSOBJ kFsCacheObjRetainInternal(PKFSOBJ pObj)
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| 412 | {
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| 413 | KU32 cRefs = ++pObj->cRefs;
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| 414 | kHlpAssert(cRefs < 16384);
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| 415 | K_NOREF(cRefs);
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| 416 | return pObj;
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| 417 | }
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| 418 |
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| 419 |
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| 420 | #ifndef NDEBUG
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| 421 |
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| 422 | /**
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| 423 | * Debug printing.
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| 424 | * @param pszFormat Debug format string.
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| 425 | * @param ... Format argument.
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| 426 | */
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| 427 | static void kFsCacheDbgPrintfV(const char *pszFormat, va_list va)
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| 428 | {
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| 429 | if (1)
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| 430 | {
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| 431 | DWORD const dwSavedErr = GetLastError();
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| 432 |
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| 433 | fprintf(stderr, "debug: ");
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| 434 | vfprintf(stderr, pszFormat, va);
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| 435 |
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| 436 | SetLastError(dwSavedErr);
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| 437 | }
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| 438 | }
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| 439 |
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| 440 |
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| 441 | /**
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| 442 | * Debug printing.
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| 443 | * @param pszFormat Debug format string.
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| 444 | * @param ... Format argument.
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| 445 | */
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| 446 | static void kFsCacheDbgPrintf(const char *pszFormat, ...)
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| 447 | {
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| 448 | if (1)
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| 449 | {
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| 450 | va_list va;
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| 451 | va_start(va, pszFormat);
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| 452 | kFsCacheDbgPrintfV(pszFormat, va);
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| 453 | va_end(va);
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| 454 | }
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| 455 | }
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| 456 |
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| 457 | #endif /* !NDEBUG */
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| 458 |
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| 459 |
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| 460 |
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| 461 | /**
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| 462 | * Hashes a string.
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| 463 | *
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| 464 | * @returns 32-bit string hash.
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| 465 | * @param pszString String to hash.
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| 466 | */
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| 467 | static KU32 kFsCacheStrHash(const char *pszString)
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| 468 | {
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| 469 | /* This algorithm was created for sdbm (a public-domain reimplementation of
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| 470 | ndbm) database library. it was found to do well in scrambling bits,
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| 471 | causing better distribution of the keys and fewer splits. it also happens
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| 472 | to be a good general hashing function with good distribution. the actual
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| 473 | function is hash(i) = hash(i - 1) * 65599 + str[i]; what is included below
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| 474 | is the faster version used in gawk. [there is even a faster, duff-device
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| 475 | version] the magic constant 65599 was picked out of thin air while
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| 476 | experimenting with different constants, and turns out to be a prime.
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| 477 | this is one of the algorithms used in berkeley db (see sleepycat) and
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| 478 | elsewhere. */
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| 479 | KU32 uHash = 0;
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| 480 | KU32 uChar;
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| 481 | while ((uChar = (unsigned char)*pszString++) != 0)
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| 482 | uHash = uChar + (uHash << 6) + (uHash << 16) - uHash;
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| 483 | return uHash;
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| 484 | }
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| 485 |
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| 486 |
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| 487 | /**
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| 488 | * Hashes a string.
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| 489 | *
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| 490 | * @returns The string length.
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| 491 | * @param pszString String to hash.
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| 492 | * @param puHash Where to return the 32-bit string hash.
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| 493 | */
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| 494 | static KSIZE kFsCacheStrHashEx(const char *pszString, KU32 *puHash)
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| 495 | {
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| 496 | const char * const pszStart = pszString;
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| 497 | KU32 uHash = 0;
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| 498 | KU32 uChar;
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| 499 | while ((uChar = (unsigned char)*pszString) != 0)
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| 500 | {
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| 501 | uHash = uChar + (uHash << 6) + (uHash << 16) - uHash;
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| 502 | pszString++;
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| 503 | }
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| 504 | *puHash = uHash;
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| 505 | return pszString - pszStart;
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| 506 | }
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| 507 |
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| 508 |
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| 509 | /**
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| 510 | * Hashes a string.
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| 511 | *
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| 512 | * @returns The string length in wchar_t units.
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| 513 | * @param pwszString String to hash.
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| 514 | * @param puHash Where to return the 32-bit string hash.
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| 515 | */
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| 516 | static KSIZE kFsCacheUtf16HashEx(const wchar_t *pwszString, KU32 *puHash)
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| 517 | {
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| 518 | const wchar_t * const pwszStart = pwszString;
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| 519 | KU32 uHash = 0;
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| 520 | KU32 uChar;
|
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| 521 | while ((uChar = *pwszString) != 0)
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| 522 | {
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| 523 | uHash = uChar + (uHash << 6) + (uHash << 16) - uHash;
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| 524 | pwszString++;
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| 525 | }
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| 526 | *puHash = uHash;
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| 527 | return pwszString - pwszStart;
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| 528 | }
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| 529 |
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| 530 | #if 0
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| 531 |
|
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| 532 | /**
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| 533 | * Converts the given string to unicode.
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| 534 | *
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| 535 | * @returns Length of the resulting string in wchar_t's.
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| 536 | * @param pszSrc The source string.
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| 537 | * @param pwszDst The destination buffer.
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| 538 | * @param cwcDst The size of the destination buffer in wchar_t's.
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| 539 | */
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| 540 | static KSIZE kwStrToUtf16(const char *pszSrc, wchar_t *pwszDst, KSIZE cwcDst)
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| 541 | {
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| 542 | /* Just to the quick ASCII stuff for now. correct ansi code page stuff later some time. */
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| 543 | KSIZE offDst = 0;
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| 544 | while (offDst < cwcDst)
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| 545 | {
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| 546 | char ch = *pszSrc++;
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| 547 | pwszDst[offDst++] = ch;
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| 548 | if (!ch)
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| 549 | return offDst - 1;
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| 550 | kHlpAssert((unsigned)ch < 127);
|
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| 551 | }
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| 552 |
|
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| 553 | pwszDst[offDst - 1] = '\0';
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| 554 | return offDst;
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| 555 | }
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| 556 |
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| 557 |
|
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| 558 | /**
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| 559 | * Converts the given UTF-16 to a normal string.
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| 560 | *
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| 561 | * @returns Length of the resulting string.
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| 562 | * @param pwszSrc The source UTF-16 string.
|
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| 563 | * @param pszDst The destination buffer.
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| 564 | * @param cbDst The size of the destination buffer in bytes.
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| 565 | */
|
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| 566 | static KSIZE kwUtf16ToStr(const wchar_t *pwszSrc, char *pszDst, KSIZE cbDst)
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| 567 | {
|
|---|
| 568 | /* Just to the quick ASCII stuff for now. correct ansi code page stuff later some time. */
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| 569 | KSIZE offDst = 0;
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| 570 | while (offDst < cbDst)
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| 571 | {
|
|---|
| 572 | wchar_t wc = *pwszSrc++;
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| 573 | pszDst[offDst++] = (char)wc;
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| 574 | if (!wc)
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| 575 | return offDst - 1;
|
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| 576 | kHlpAssert((unsigned)wc < 127);
|
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| 577 | }
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| 578 |
|
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| 579 | pszDst[offDst - 1] = '\0';
|
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| 580 | return offDst;
|
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| 581 | }
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| 582 |
|
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| 583 |
|
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| 584 |
|
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| 585 | /** UTF-16 string length. */
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| 586 | static KSIZE kwUtf16Len(wchar_t const *pwsz)
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| 587 | {
|
|---|
| 588 | KSIZE cwc = 0;
|
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| 589 | while (*pwsz != '\0')
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| 590 | cwc++, pwsz++;
|
|---|
| 591 | return cwc;
|
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| 592 | }
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| 593 |
|
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| 594 | /**
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| 595 | * Copy out the UTF-16 string following the convension of GetModuleFileName
|
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| 596 | */
|
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| 597 | static DWORD kwUtf16CopyStyle1(wchar_t const *pwszSrc, wchar_t *pwszDst, KSIZE cwcDst)
|
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| 598 | {
|
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| 599 | KSIZE cwcSrc = kwUtf16Len(pwszSrc);
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| 600 | if (cwcSrc + 1 <= cwcDst)
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| 601 | {
|
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| 602 | kHlpMemCopy(pwszDst, pwszSrc, (cwcSrc + 1) * sizeof(wchar_t));
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| 603 | return (DWORD)cwcSrc;
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| 604 | }
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| 605 | if (cwcDst > 0)
|
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| 606 | {
|
|---|
| 607 | KSIZE cwcDstTmp = cwcDst - 1;
|
|---|
| 608 | pwszDst[cwcDstTmp] = '\0';
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| 609 | if (cwcDstTmp > 0)
|
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| 610 | kHlpMemCopy(pwszDst, pwszSrc, cwcDstTmp);
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| 611 | }
|
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| 612 | SetLastError(ERROR_INSUFFICIENT_BUFFER);
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| 613 | return (DWORD)cwcDst;
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| 614 | }
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|---|
| 615 |
|
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| 616 |
|
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| 617 | /**
|
|---|
| 618 | * Copy out the ANSI string following the convension of GetModuleFileName
|
|---|
| 619 | */
|
|---|
| 620 | static DWORD kwStrCopyStyle1(char const *pszSrc, char *pszDst, KSIZE cbDst)
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| 621 | {
|
|---|
| 622 | KSIZE cchSrc = kHlpStrLen(pszSrc);
|
|---|
| 623 | if (cchSrc + 1 <= cbDst)
|
|---|
| 624 | {
|
|---|
| 625 | kHlpMemCopy(pszDst, pszSrc, cchSrc + 1);
|
|---|
| 626 | return (DWORD)cchSrc;
|
|---|
| 627 | }
|
|---|
| 628 | if (cbDst > 0)
|
|---|
| 629 | {
|
|---|
| 630 | KSIZE cbDstTmp = cbDst - 1;
|
|---|
| 631 | pszDst[cbDstTmp] = '\0';
|
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| 632 | if (cbDstTmp > 0)
|
|---|
| 633 | kHlpMemCopy(pszDst, pszSrc, cbDstTmp);
|
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| 634 | }
|
|---|
| 635 | SetLastError(ERROR_INSUFFICIENT_BUFFER);
|
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| 636 | return (DWORD)cbDst;
|
|---|
| 637 | }
|
|---|
| 638 |
|
|---|
| 639 |
|
|---|
| 640 | /**
|
|---|
| 641 | * Normalizes the path so we get a consistent hash.
|
|---|
| 642 | *
|
|---|
| 643 | * @returns status code.
|
|---|
| 644 | * @param pszPath The path.
|
|---|
| 645 | * @param pszNormPath The output buffer.
|
|---|
| 646 | * @param cbNormPath The size of the output buffer.
|
|---|
| 647 | */
|
|---|
| 648 | static int kwPathNormalize(const char *pszPath, char *pszNormPath, KSIZE cbNormPath)
|
|---|
| 649 | {
|
|---|
| 650 | char *pchSlash;
|
|---|
| 651 | KSIZE cchNormPath;
|
|---|
| 652 |
|
|---|
| 653 | /*
|
|---|
| 654 | * We hash these to speed stuff up (nt_fullpath isn't cheap and we're
|
|---|
| 655 | * gonna have many repeat queries and assume nobody do case changes to
|
|---|
| 656 | * anything essential while kmk is running).
|
|---|
| 657 | */
|
|---|
| 658 | KU32 uHashPath;
|
|---|
| 659 | KU32 cchPath = (KU32)kFsCacheStrHashEx(pszPath, &uHashPath);
|
|---|
| 660 | KU32 const idxHashTab = uHashPath % K_ELEMENTS(g_apFsNormalizedPathsA);
|
|---|
| 661 | PKFSNORMHASHA pHashEntry = g_apFsNormalizedPathsA[idxHashTab];
|
|---|
| 662 | if (pHashEntry)
|
|---|
| 663 | {
|
|---|
| 664 | do
|
|---|
| 665 | {
|
|---|
| 666 | if ( pHashEntry->uHashPath == uHashPath
|
|---|
| 667 | && pHashEntry->cchPath == cchPath
|
|---|
| 668 | && kHlpMemComp(pHashEntry->pszPath, pszPath, cchPath) == 0)
|
|---|
| 669 | {
|
|---|
| 670 | if (cbNormPath > pHashEntry->cchNormPath)
|
|---|
| 671 | {
|
|---|
| 672 | KFSCACHE_LOG(("kwPathNormalize(%s) - hit\n", pszPath));
|
|---|
| 673 | kHlpMemCopy(pszNormPath, pHashEntry->szNormPath, pHashEntry->cchNormPath + 1);
|
|---|
| 674 | return 0;
|
|---|
| 675 | }
|
|---|
| 676 | return KERR_BUFFER_OVERFLOW;
|
|---|
| 677 | }
|
|---|
| 678 | pHashEntry = pHashEntry->pNext;
|
|---|
| 679 | } while (pHashEntry);
|
|---|
| 680 | }
|
|---|
| 681 |
|
|---|
| 682 | /*
|
|---|
| 683 | * Do it the slow way.
|
|---|
| 684 | */
|
|---|
| 685 | nt_fullpath(pszPath, pszNormPath, cbNormPath);
|
|---|
| 686 | /** @todo nt_fullpath overflow handling?!?!? */
|
|---|
| 687 |
|
|---|
| 688 | pchSlash = kHlpStrChr(pszNormPath, '/');
|
|---|
| 689 | while (pchSlash)
|
|---|
| 690 | {
|
|---|
| 691 | *pchSlash = '\\';
|
|---|
| 692 | pchSlash = kHlpStrChr(pchSlash + 1, '/');
|
|---|
| 693 | }
|
|---|
| 694 |
|
|---|
| 695 | /*
|
|---|
| 696 | * Create a new hash table entry (ignore failures).
|
|---|
| 697 | */
|
|---|
| 698 | cchNormPath = kHlpStrLen(pszNormPath);
|
|---|
| 699 | if (cchNormPath < KU16_MAX && cchPath < KU16_MAX)
|
|---|
| 700 | {
|
|---|
| 701 | pHashEntry = (PKFSNORMHASHA)kHlpAlloc(sizeof(*pHashEntry) + cchNormPath + 1 + cchPath + 1);
|
|---|
| 702 | if (pHashEntry)
|
|---|
| 703 | {
|
|---|
| 704 | pHashEntry->cchNormPath = (KU16)cchNormPath;
|
|---|
| 705 | pHashEntry->cchPath = (KU16)cchPath;
|
|---|
| 706 | pHashEntry->uHashPath = uHashPath;
|
|---|
| 707 | pHashEntry->pszPath = (char *)kHlpMemCopy(&pHashEntry->szNormPath[cchNormPath + 1], pszPath, cchPath + 1);
|
|---|
| 708 | kHlpMemCopy(pHashEntry->szNormPath, pszNormPath, cchNormPath + 1);
|
|---|
| 709 |
|
|---|
| 710 | pHashEntry->pNext = g_apFsNormalizedPathsA[idxHashTab];
|
|---|
| 711 | g_apFsNormalizedPathsA[idxHashTab] = pHashEntry;
|
|---|
| 712 | }
|
|---|
| 713 | }
|
|---|
| 714 |
|
|---|
| 715 | return 0;
|
|---|
| 716 | }
|
|---|
| 717 |
|
|---|
| 718 |
|
|---|
| 719 | /**
|
|---|
| 720 | * Get the pointer to the filename part of the path.
|
|---|
| 721 | *
|
|---|
| 722 | * @returns Pointer to where the filename starts within the string pointed to by pszFilename.
|
|---|
| 723 | * @returns Pointer to the terminator char if no filename.
|
|---|
| 724 | * @param pszPath The path to parse.
|
|---|
| 725 | */
|
|---|
| 726 | static wchar_t *kwPathGetFilenameW(const wchar_t *pwszPath)
|
|---|
| 727 | {
|
|---|
| 728 | const wchar_t *pwszLast = NULL;
|
|---|
| 729 | for (;;)
|
|---|
| 730 | {
|
|---|
| 731 | wchar_t wc = *pwszPath;
|
|---|
| 732 | #if K_OS == K_OS_OS2 || K_OS == K_OS_WINDOWS
|
|---|
| 733 | if (wc == '/' || wc == '\\' || wc == ':')
|
|---|
| 734 | {
|
|---|
| 735 | while ((wc = *++pwszPath) == '/' || wc == '\\' || wc == ':')
|
|---|
| 736 | /* nothing */;
|
|---|
| 737 | pwszLast = pwszPath;
|
|---|
| 738 | }
|
|---|
| 739 | #else
|
|---|
| 740 | if (wc == '/')
|
|---|
| 741 | {
|
|---|
| 742 | while ((wc = *++pszFilename) == '/')
|
|---|
| 743 | /* betsuni */;
|
|---|
| 744 | pwszLast = pwszPath;
|
|---|
| 745 | }
|
|---|
| 746 | #endif
|
|---|
| 747 | if (!wc)
|
|---|
| 748 | return (wchar_t *)(pwszLast ? pwszLast : pwszPath);
|
|---|
| 749 | pwszPath++;
|
|---|
| 750 | }
|
|---|
| 751 | }
|
|---|
| 752 |
|
|---|
| 753 |
|
|---|
| 754 | /**
|
|---|
| 755 | * Check if the path leads to a regular file (that exists).
|
|---|
| 756 | *
|
|---|
| 757 | * @returns K_TRUE / K_FALSE
|
|---|
| 758 | * @param pszPath Path to the file to check out.
|
|---|
| 759 | */
|
|---|
| 760 | static KBOOL kwLdrModuleIsRegularFile(const char *pszPath)
|
|---|
| 761 | {
|
|---|
| 762 | /* For stuff with .DLL extensions, we can use the GetFileAttribute cache to speed this up! */
|
|---|
| 763 | KSIZE cchPath = kHlpStrLen(pszPath);
|
|---|
| 764 | if ( cchPath > 3
|
|---|
| 765 | && pszPath[cchPath - 4] == '.'
|
|---|
| 766 | && (pszPath[cchPath - 3] == 'd' || pszPath[cchPath - 3] == 'D')
|
|---|
| 767 | && (pszPath[cchPath - 2] == 'l' || pszPath[cchPath - 2] == 'L')
|
|---|
| 768 | && (pszPath[cchPath - 1] == 'l' || pszPath[cchPath - 1] == 'L') )
|
|---|
| 769 | {
|
|---|
| 770 | PKFSOBJ pFsObj = kFsCacheLookupA(pszPath);
|
|---|
| 771 | if (pFsObj)
|
|---|
| 772 | {
|
|---|
| 773 | if (!(pFsObj->fAttribs & (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_DEVICE))) /* also checks invalid */
|
|---|
| 774 | return K_TRUE;
|
|---|
| 775 | }
|
|---|
| 776 | }
|
|---|
| 777 | else
|
|---|
| 778 | {
|
|---|
| 779 | BirdStat_T Stat;
|
|---|
| 780 | int rc = birdStatFollowLink(pszPath, &Stat);
|
|---|
| 781 | if (rc == 0)
|
|---|
| 782 | {
|
|---|
| 783 | if (S_ISREG(Stat.st_mode))
|
|---|
| 784 | return K_TRUE;
|
|---|
| 785 | }
|
|---|
| 786 | }
|
|---|
| 787 | return K_FALSE;
|
|---|
| 788 | }
|
|---|
| 789 |
|
|---|
| 790 |
|
|---|
| 791 |
|
|---|
| 792 |
|
|---|
| 793 |
|
|---|
| 794 |
|
|---|
| 795 | /**
|
|---|
| 796 | * Helper for getting the extension of a UTF-16 path.
|
|---|
| 797 | *
|
|---|
| 798 | * @returns Pointer to the extension or the terminator.
|
|---|
| 799 | * @param pwszPath The path.
|
|---|
| 800 | * @param pcwcExt Where to return the length of the extension.
|
|---|
| 801 | */
|
|---|
| 802 | static wchar_t const *kwFsPathGetExtW(wchar_t const *pwszPath, KSIZE *pcwcExt)
|
|---|
| 803 | {
|
|---|
| 804 | wchar_t const *pwszName = pwszPath;
|
|---|
| 805 | wchar_t const *pwszExt = NULL;
|
|---|
| 806 | for (;;)
|
|---|
| 807 | {
|
|---|
| 808 | wchar_t const wc = *pwszPath++;
|
|---|
| 809 | if (wc == '.')
|
|---|
| 810 | pwszExt = pwszPath;
|
|---|
| 811 | else if (wc == '/' || wc == '\\' || wc == ':')
|
|---|
| 812 | {
|
|---|
| 813 | pwszName = pwszPath;
|
|---|
| 814 | pwszExt = NULL;
|
|---|
| 815 | }
|
|---|
| 816 | else if (wc == '\0')
|
|---|
| 817 | {
|
|---|
| 818 | if (pwszExt)
|
|---|
| 819 | {
|
|---|
| 820 | *pcwcExt = pwszPath - pwszExt - 1;
|
|---|
| 821 | return pwszExt;
|
|---|
| 822 | }
|
|---|
| 823 | *pcwcExt = 0;
|
|---|
| 824 | return pwszPath - 1;
|
|---|
| 825 | }
|
|---|
| 826 | }
|
|---|
| 827 | }
|
|---|
| 828 | #endif
|
|---|
| 829 |
|
|---|
| 830 |
|
|---|
| 831 | /**
|
|---|
| 832 | * Looks for '..' in the path.
|
|---|
| 833 | *
|
|---|
| 834 | * @returns K_TRUE if '..' component found, K_FALSE if not.
|
|---|
| 835 | * @param pszPath The path.
|
|---|
| 836 | * @param cchPath The length of the path.
|
|---|
| 837 | */
|
|---|
| 838 | static KBOOL kFsCacheHasDotDotA(const char *pszPath, KSIZE cchPath)
|
|---|
| 839 | {
|
|---|
| 840 | const char *pchDot = (const char *)kHlpMemChr(pszPath, '.', cchPath);
|
|---|
| 841 | while (pchDot)
|
|---|
| 842 | {
|
|---|
| 843 | if (pchDot[1] != '.')
|
|---|
| 844 | pchDot = (const char *)kHlpMemChr(pchDot + 1, '.', &pszPath[cchPath] - pchDot - 1);
|
|---|
| 845 | else
|
|---|
| 846 | {
|
|---|
| 847 | char ch;
|
|---|
| 848 | if ( (ch = pchDot[2]) == '\0'
|
|---|
| 849 | && IS_SLASH(ch))
|
|---|
| 850 | {
|
|---|
| 851 | if (pchDot == pszPath)
|
|---|
| 852 | return K_TRUE;
|
|---|
| 853 | ch = pchDot[-1];
|
|---|
| 854 | if ( IS_SLASH(ch)
|
|---|
| 855 | || ch == ':')
|
|---|
| 856 | return K_TRUE;
|
|---|
| 857 | }
|
|---|
| 858 | pchDot = (const char *)kHlpMemChr(pchDot + 2, '.', &pszPath[cchPath] - pchDot - 2);
|
|---|
| 859 | }
|
|---|
| 860 | }
|
|---|
| 861 |
|
|---|
| 862 | return K_FALSE;
|
|---|
| 863 | }
|
|---|
| 864 |
|
|---|
| 865 |
|
|---|
| 866 | /**
|
|---|
| 867 | * Looks for '..' in the path.
|
|---|
| 868 | *
|
|---|
| 869 | * @returns K_TRUE if '..' component found, K_FALSE if not.
|
|---|
| 870 | * @param pwszPath The path.
|
|---|
| 871 | * @param cwcPath The length of the path (in wchar_t's).
|
|---|
| 872 | */
|
|---|
| 873 | static KBOOL kFsCacheHasDotDotW(const wchar_t *pwszPath, KSIZE cwcPath)
|
|---|
| 874 | {
|
|---|
| 875 | const wchar_t *pwcDot = wmemchr(pwszPath, '.', cwcPath);
|
|---|
| 876 | while (pwcDot)
|
|---|
| 877 | {
|
|---|
| 878 | if (pwcDot[1] != '.')
|
|---|
| 879 | pwcDot = wmemchr(pwcDot + 1, '.', &pwszPath[cwcPath] - pwcDot - 1);
|
|---|
| 880 | else
|
|---|
| 881 | {
|
|---|
| 882 | wchar_t wch;
|
|---|
| 883 | if ( (wch = pwcDot[2]) == '\0'
|
|---|
| 884 | && IS_SLASH(wch))
|
|---|
| 885 | {
|
|---|
| 886 | if (pwcDot == pwszPath)
|
|---|
| 887 | return K_TRUE;
|
|---|
| 888 | wch = pwcDot[-1];
|
|---|
| 889 | if ( IS_SLASH(wch)
|
|---|
| 890 | || wch == ':')
|
|---|
| 891 | return K_TRUE;
|
|---|
| 892 | }
|
|---|
| 893 | pwcDot = wmemchr(pwcDot + 2, '.', &pwszPath[cwcPath] - pwcDot - 2);
|
|---|
| 894 | }
|
|---|
| 895 | }
|
|---|
| 896 |
|
|---|
| 897 | return K_FALSE;
|
|---|
| 898 | }
|
|---|
| 899 |
|
|---|
| 900 |
|
|---|
| 901 | /**
|
|---|
| 902 | * Creates an ANSI hash table entry for the given path.
|
|---|
| 903 | *
|
|---|
| 904 | * @returns The hash table entry or NULL if out of memory.
|
|---|
| 905 | * @param pCache The hash
|
|---|
| 906 | * @param pFsObj The resulting object.
|
|---|
| 907 | * @param pszPath The path.
|
|---|
| 908 | * @param cchPath The length of the path.
|
|---|
| 909 | * @param uHashPath The hash of the path.
|
|---|
| 910 | * @param idxHashTab The hash table index of the path.
|
|---|
| 911 | * @param enmError The lookup error.
|
|---|
| 912 | */
|
|---|
| 913 | static PKFSHASHA kFsCacheCreatePathHashTabEntryA(PKFSCACHE pCache, PKFSOBJ pFsObj, const char *pszPath, KU32 cchPath,
|
|---|
| 914 | KU32 uHashPath, KU32 idxHashTab, KFSLOOKUPERROR enmError)
|
|---|
| 915 | {
|
|---|
| 916 | PKFSHASHA pHashEntry = (PKFSHASHA)kHlpAlloc(sizeof(*pHashEntry) + cchPath + 1);
|
|---|
| 917 | if (pHashEntry)
|
|---|
| 918 | {
|
|---|
| 919 | pHashEntry->uHashPath = uHashPath;
|
|---|
| 920 | pHashEntry->cchPath = cchPath;
|
|---|
| 921 | pHashEntry->pszPath = (const char *)kHlpMemCopy(pHashEntry + 1, pszPath, cchPath + 1);
|
|---|
| 922 | pHashEntry->pFsObj = pFsObj;
|
|---|
| 923 | pHashEntry->enmError = enmError;
|
|---|
| 924 | if (pFsObj)
|
|---|
| 925 | pHashEntry->uCacheGen = pCache->uGeneration;
|
|---|
| 926 | else if (enmError != KFSLOOKUPERROR_UNSUPPORTED)
|
|---|
| 927 | pHashEntry->uCacheGen = pCache->uGenerationMissing;
|
|---|
| 928 | else
|
|---|
| 929 | pHashEntry->uCacheGen = KFSWOBJ_CACHE_GEN_IGNORE;
|
|---|
| 930 |
|
|---|
| 931 | pHashEntry->pNext = pCache->apAnsiPaths[idxHashTab];
|
|---|
| 932 | pCache->apAnsiPaths[idxHashTab] = pHashEntry;
|
|---|
| 933 |
|
|---|
| 934 | pCache->cbAnsiPaths += sizeof(*pHashEntry) + cchPath + 1;
|
|---|
| 935 | pCache->cAnsiPaths++;
|
|---|
| 936 | if (pHashEntry->pNext)
|
|---|
| 937 | pCache->cAnsiPathCollisions++;
|
|---|
| 938 | }
|
|---|
| 939 | return pHashEntry;
|
|---|
| 940 | }
|
|---|
| 941 |
|
|---|
| 942 |
|
|---|
| 943 | /**
|
|---|
| 944 | * Creates an UTF-16 hash table entry for the given path.
|
|---|
| 945 | *
|
|---|
| 946 | * @returns The hash table entry or NULL if out of memory.
|
|---|
| 947 | * @param pCache The hash
|
|---|
| 948 | * @param pFsObj The resulting object.
|
|---|
| 949 | * @param pwszPath The path.
|
|---|
| 950 | * @param cwcPath The length of the path (in wchar_t's).
|
|---|
| 951 | * @param uHashPath The hash of the path.
|
|---|
| 952 | * @param idxHashTab The hash table index of the path.
|
|---|
| 953 | * @param enmError The lookup error.
|
|---|
| 954 | */
|
|---|
| 955 | static PKFSHASHW kFsCacheCreatePathHashTabEntryW(PKFSCACHE pCache, PKFSOBJ pFsObj, const wchar_t *pwszPath, KU32 cwcPath,
|
|---|
| 956 | KU32 uHashPath, KU32 idxHashTab, KFSLOOKUPERROR enmError)
|
|---|
| 957 | {
|
|---|
| 958 | PKFSHASHW pHashEntry = (PKFSHASHW)kHlpAlloc(sizeof(*pHashEntry) + (cwcPath + 1) * sizeof(wchar_t));
|
|---|
| 959 | if (pHashEntry)
|
|---|
| 960 | {
|
|---|
| 961 | pHashEntry->uHashPath = uHashPath;
|
|---|
| 962 | pHashEntry->cwcPath = cwcPath;
|
|---|
| 963 | pHashEntry->pwszPath = (const wchar_t *)kHlpMemCopy(pHashEntry + 1, pwszPath, (cwcPath + 1) * sizeof(wchar_t));
|
|---|
| 964 | pHashEntry->pFsObj = pFsObj;
|
|---|
| 965 | pHashEntry->enmError = enmError;
|
|---|
| 966 | if (pFsObj)
|
|---|
| 967 | pHashEntry->uCacheGen = pCache->uGeneration;
|
|---|
| 968 | else if (enmError != KFSLOOKUPERROR_UNSUPPORTED)
|
|---|
| 969 | pHashEntry->uCacheGen = pCache->uGenerationMissing;
|
|---|
| 970 | else
|
|---|
| 971 | pHashEntry->uCacheGen = KFSWOBJ_CACHE_GEN_IGNORE;
|
|---|
| 972 |
|
|---|
| 973 | pHashEntry->pNext = pCache->apUtf16Paths[idxHashTab];
|
|---|
| 974 | pCache->apUtf16Paths[idxHashTab] = pHashEntry;
|
|---|
| 975 |
|
|---|
| 976 | pCache->cbUtf16Paths += sizeof(*pHashEntry) + (cwcPath + 1) * sizeof(wchar_t);
|
|---|
| 977 | pCache->cUtf16Paths++;
|
|---|
| 978 | if (pHashEntry->pNext)
|
|---|
| 979 | pCache->cAnsiPathCollisions++;
|
|---|
| 980 | }
|
|---|
| 981 | return pHashEntry;
|
|---|
| 982 | }
|
|---|
| 983 |
|
|---|
| 984 |
|
|---|
| 985 | /**
|
|---|
| 986 | * Links the child in under the parent.
|
|---|
| 987 | *
|
|---|
| 988 | * @returns K_TRUE on success, K_FALSE if out of memory.
|
|---|
| 989 | * @param pParent The parent node.
|
|---|
| 990 | * @param pChild The child node.
|
|---|
| 991 | */
|
|---|
| 992 | static KBOOL kFsCacheDirAddChild(PKFSCACHE pCache, PKFSDIR pParent, PKFSOBJ pChild, KFSLOOKUPERROR *penmError)
|
|---|
| 993 | {
|
|---|
| 994 | if ((pParent->cChildren % 16) == 0)
|
|---|
| 995 | {
|
|---|
| 996 | void *pvNew = kHlpRealloc(pParent->papChildren, (pParent->cChildren + 16) * sizeof(pParent->papChildren[0]));
|
|---|
| 997 | if (!pvNew)
|
|---|
| 998 | return K_FALSE;
|
|---|
| 999 | pParent->papChildren = (PKFSOBJ *)pvNew;
|
|---|
| 1000 | pCache->cbObjects += 16 * sizeof(pParent->papChildren[0]);
|
|---|
| 1001 | }
|
|---|
| 1002 | pParent->papChildren[pParent->cChildren++] = pChild;
|
|---|
| 1003 | return K_TRUE;
|
|---|
| 1004 | }
|
|---|
| 1005 |
|
|---|
| 1006 |
|
|---|
| 1007 | /**
|
|---|
| 1008 | * Creates a new cache object.
|
|---|
| 1009 | *
|
|---|
| 1010 | * @returns Pointer (with 1 reference) to the new object. The object will not
|
|---|
| 1011 | * be linked to the parent directory yet.
|
|---|
| 1012 | *
|
|---|
| 1013 | * NULL if we're out of memory.
|
|---|
| 1014 | *
|
|---|
| 1015 | * @param pCache The cache.
|
|---|
| 1016 | * @param pParent The parent directory.
|
|---|
| 1017 | * @param pszName The ANSI name.
|
|---|
| 1018 | * @param cchName The length of the ANSI name.
|
|---|
| 1019 | * @param pwszName The UTF-16 name.
|
|---|
| 1020 | * @param cwcName The length of the UTF-16 name.
|
|---|
| 1021 | * @param pszShortName The ANSI short name, NULL if none.
|
|---|
| 1022 | * @param cchShortName The length of the ANSI short name, 0 if none.
|
|---|
| 1023 | * @param pwszShortName The UTF-16 short name, NULL if none.
|
|---|
| 1024 | * @param cwcShortName The length of the UTF-16 short name, 0 if none.
|
|---|
| 1025 | * @param bObjType The objct type.
|
|---|
| 1026 | * @param penmError Where to explain failures.
|
|---|
| 1027 | */
|
|---|
| 1028 | static PKFSOBJ kFsCacheCreateObject(PKFSCACHE pCache, PKFSDIR pParent,
|
|---|
| 1029 | char const *pszName, KU16 cchName, wchar_t const *pwszName, KU16 cwcName,
|
|---|
| 1030 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1031 | char const *pszShortName, KU16 cchShortName, wchar_t const *pwszShortName, KU16 cwcShortName,
|
|---|
| 1032 | #endif
|
|---|
| 1033 | KU8 bObjType, KFSLOOKUPERROR *penmError)
|
|---|
| 1034 | {
|
|---|
| 1035 | /*
|
|---|
| 1036 | * Allocate the object.
|
|---|
| 1037 | */
|
|---|
| 1038 | KBOOL const fDirish = bObjType != KFSOBJ_TYPE_FILE && bObjType == KFSOBJ_TYPE_OTHER;
|
|---|
| 1039 | KSIZE const cbObj = (fDirish ? sizeof(KFSDIR) : sizeof(KFSOBJ))
|
|---|
| 1040 | + (cwcName + 1) * sizeof(wchar_t) + cchName + 1
|
|---|
| 1041 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1042 | + (cwcShortName > 0 ? (cwcShortName + 1) * sizeof(wchar_t) + cchShortName + 1 : 0)
|
|---|
| 1043 | #endif
|
|---|
| 1044 | ;
|
|---|
| 1045 | PKFSOBJ pObj = (PKFSOBJ)kHlpAlloc(cbObj);
|
|---|
| 1046 | if (pObj)
|
|---|
| 1047 | {
|
|---|
| 1048 | KU8 *pbExtra = (KU8 *)(pObj + 1);
|
|---|
| 1049 |
|
|---|
| 1050 | pCache->cbObjects += cbObj;
|
|---|
| 1051 | pCache->cObjects++;
|
|---|
| 1052 |
|
|---|
| 1053 | /*
|
|---|
| 1054 | * Initialize the object.
|
|---|
| 1055 | */
|
|---|
| 1056 | pObj->u32Magic = KFSOBJ_MAGIC;
|
|---|
| 1057 | pObj->cRefs = 1;
|
|---|
| 1058 | pObj->uCacheGen = bObjType != KFSOBJ_TYPE_MISSING ? pCache->uGeneration : pCache->uGenerationMissing;
|
|---|
| 1059 | pObj->bObjType = bObjType;
|
|---|
| 1060 | pObj->fHaveStats = K_FALSE;
|
|---|
| 1061 | pObj->abUnused[0] = K_FALSE;
|
|---|
| 1062 | pObj->abUnused[1] = K_FALSE;
|
|---|
| 1063 | pObj->fFlags = pParent->Obj.fFlags;
|
|---|
| 1064 | pObj->pParent = pParent;
|
|---|
| 1065 |
|
|---|
| 1066 | #ifdef KFSCACHE_CFG_UTF16
|
|---|
| 1067 | pObj->cwcParent = pParent->Obj.cwcParent + pParent->Obj.cwcName + !!pParent->Obj.cwcName;
|
|---|
| 1068 | pObj->pwszName = (wchar_t *)kHlpMemCopy(pbExtra, pwszName, cwcName * sizeof(wchar_t));
|
|---|
| 1069 | pbExtra += cwcName * sizeof(wchar_t);
|
|---|
| 1070 | *pbExtra++ = '\0';
|
|---|
| 1071 | *pbExtra++ = '\0';
|
|---|
| 1072 | # ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1073 | pObj->cwcShortParent = pParent->Obj.cwcShortParent + pParent->Obj.cwcShortName + !!pParent->Obj.cwcShortName;
|
|---|
| 1074 | if (cwcShortName)
|
|---|
| 1075 | {
|
|---|
| 1076 | pObj->pwszShortName = (wchar_t *)kHlpMemCopy(pbExtra, pwszShortName, cwcShortName * sizeof(wchar_t));
|
|---|
| 1077 | pbExtra += cwcShortName * sizeof(wchar_t);
|
|---|
| 1078 | *pbExtra++ = '\0';
|
|---|
| 1079 | *pbExtra++ = '\0';
|
|---|
| 1080 | }
|
|---|
| 1081 | else
|
|---|
| 1082 | {
|
|---|
| 1083 | pObj->pwszShortName = pObj->pwszName;
|
|---|
| 1084 | pObj->cwcShortName = pObj->cwcName;
|
|---|
| 1085 | }
|
|---|
| 1086 | # endif
|
|---|
| 1087 | #endif
|
|---|
| 1088 | pObj->cchParent = pParent->Obj.cchParent + pParent->Obj.cchName + !!pParent->Obj.cchName;
|
|---|
| 1089 | pObj->pszName = (char *)kHlpMemCopy(pbExtra, pszName, cchName);
|
|---|
| 1090 | pbExtra += cchName;
|
|---|
| 1091 | *pbExtra++ = '\0';
|
|---|
| 1092 | # ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1093 | pObj->cchShortParent = pParent->Obj.cchShortParent + pParent->Obj.cchShortName + !!pParent->Obj.cchShortName;
|
|---|
| 1094 | if (cchShortName)
|
|---|
| 1095 | {
|
|---|
| 1096 | pObj->pszShortName = (char *)kHlpMemCopy(pbExtra, pszShortName, cchShortName);
|
|---|
| 1097 | pbExtra += cchShortName;
|
|---|
| 1098 | *pbExtra++ = '\0';
|
|---|
| 1099 | }
|
|---|
| 1100 | else
|
|---|
| 1101 | {
|
|---|
| 1102 | pObj->pszShortName = pObj->pszName;
|
|---|
| 1103 | pObj->cchShortName = pObj->cchName;
|
|---|
| 1104 | }
|
|---|
| 1105 | #endif
|
|---|
| 1106 | kHlpAssert(pbExtra - (KU8 *)pObj == cbObj);
|
|---|
| 1107 |
|
|---|
| 1108 | /*
|
|---|
| 1109 | * Type specific initilization.
|
|---|
| 1110 | */
|
|---|
| 1111 | if (fDirish)
|
|---|
| 1112 | {
|
|---|
| 1113 | PKFSDIR pDirObj = (PKFSDIR)pObj;
|
|---|
| 1114 | pDirObj->cChildren = 0;
|
|---|
| 1115 | pDirObj->papChildren = NULL;
|
|---|
| 1116 | pDirObj->cHashTab = 0;
|
|---|
| 1117 | pDirObj->paHashTab = NULL;
|
|---|
| 1118 | pDirObj->hDir = INVALID_HANDLE_VALUE;
|
|---|
| 1119 | pDirObj->uDevNo = pParent->uDevNo;
|
|---|
| 1120 | pDirObj->fPopulated = K_FALSE;
|
|---|
| 1121 | }
|
|---|
| 1122 | }
|
|---|
| 1123 | else
|
|---|
| 1124 | *penmError = KFSLOOKUPERROR_OUT_OF_MEMORY;
|
|---|
| 1125 | return pObj;
|
|---|
| 1126 | }
|
|---|
| 1127 |
|
|---|
| 1128 |
|
|---|
| 1129 | /**
|
|---|
| 1130 | * Creates a new object given wide char names.
|
|---|
| 1131 | *
|
|---|
| 1132 | * This function just converts the paths and calls kFsCacheCreateObject.
|
|---|
| 1133 | *
|
|---|
| 1134 | *
|
|---|
| 1135 | * @returns Pointer (with 1 reference) to the new object. The object will not
|
|---|
| 1136 | * be linked to the parent directory yet.
|
|---|
| 1137 | *
|
|---|
| 1138 | * NULL if we're out of memory.
|
|---|
| 1139 | *
|
|---|
| 1140 | * @param pCache The cache.
|
|---|
| 1141 | * @param pParent The parent directory.
|
|---|
| 1142 | * @param pszName The ANSI name.
|
|---|
| 1143 | * @param cchName The length of the ANSI name.
|
|---|
| 1144 | * @param pwszName The UTF-16 name.
|
|---|
| 1145 | * @param cwcName The length of the UTF-16 name.
|
|---|
| 1146 | * @param pwszShortName The UTF-16 short name, NULL if none.
|
|---|
| 1147 | * @param cwcShortName The length of the UTF-16 short name, 0 if none.
|
|---|
| 1148 | * @param bObjType The objct type.
|
|---|
| 1149 | * @param penmError Where to explain failures.
|
|---|
| 1150 | */
|
|---|
| 1151 | static PKFSOBJ kFsCacheCreateObjectW(PKFSCACHE pCache, PKFSDIR pParent, wchar_t const *pwszName, KU32 cwcName,
|
|---|
| 1152 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1153 | wchar_t const *pwszShortName, KU32 cwcShortName,
|
|---|
| 1154 | #endif
|
|---|
| 1155 | KU8 bObjType, KFSLOOKUPERROR *penmError)
|
|---|
| 1156 | {
|
|---|
| 1157 | /* Convert names to ANSI first so we know their lengths. */
|
|---|
| 1158 | char szName[KFSCACHE_CFG_MAX_ANSI_NAME];
|
|---|
| 1159 | int cchName = WideCharToMultiByte(CP_ACP, 0, pwszName, cwcName, szName, sizeof(szName) - 1, NULL, NULL);
|
|---|
| 1160 | if (cchName >= 0)
|
|---|
| 1161 | {
|
|---|
| 1162 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1163 | char szShortName[12*3 + 1];
|
|---|
| 1164 | int cchShortName = 0;
|
|---|
| 1165 | if ( cwcShortName == 0
|
|---|
| 1166 | || (cchShortName = WideCharToMultiByte(CP_ACP, 0, pwszShortName, cwcShortName,
|
|---|
| 1167 | szShortName, sizeof(szShortName) - 1, NULL, NULL)) > 0)
|
|---|
| 1168 | #endif
|
|---|
| 1169 | {
|
|---|
| 1170 | return kFsCacheCreateObject(pCache, pParent,
|
|---|
| 1171 | szName, cchName, pwszName, cwcName,
|
|---|
| 1172 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1173 | szShortName, cchShortName, pwszShortName, cwcShortName,
|
|---|
| 1174 | #endif
|
|---|
| 1175 | bObjType, penmError);
|
|---|
| 1176 | }
|
|---|
| 1177 | }
|
|---|
| 1178 | *penmError = KFSLOOKUPERROR_ANSI_CONVERSION_ERROR;
|
|---|
| 1179 | return NULL;
|
|---|
| 1180 | }
|
|---|
| 1181 |
|
|---|
| 1182 |
|
|---|
| 1183 | /**
|
|---|
| 1184 | * Creates a missing object.
|
|---|
| 1185 | *
|
|---|
| 1186 | * This is used for caching negative results.
|
|---|
| 1187 | *
|
|---|
| 1188 | * @returns Pointer to the newly created object on success (already linked into
|
|---|
| 1189 | * pParent). No reference.
|
|---|
| 1190 | *
|
|---|
| 1191 | * NULL on failure.
|
|---|
| 1192 | *
|
|---|
| 1193 | * @param pCache The cache.
|
|---|
| 1194 | * @param pParent The parent directory.
|
|---|
| 1195 | * @param pchName The name.
|
|---|
| 1196 | * @param cchName The length of the name.
|
|---|
| 1197 | * @param penmError Where to return failure explanations.
|
|---|
| 1198 | */
|
|---|
| 1199 | static PKFSOBJ kFsCacheCreateMissingA(PKFSCACHE pCache, PKFSDIR pParent, const char *pchName, KU32 cchName,
|
|---|
| 1200 | KFSLOOKUPERROR *penmError)
|
|---|
| 1201 | {
|
|---|
| 1202 | /*
|
|---|
| 1203 | * Just convert the name to UTF-16 and call kFsCacheCreateObject to do the job.
|
|---|
| 1204 | */
|
|---|
| 1205 | wchar_t wszName[KFSCACHE_CFG_MAX_PATH];
|
|---|
| 1206 | int cwcName = MultiByteToWideChar(CP_ACP, 0, pchName, cchName, wszName, KFSCACHE_CFG_MAX_UTF16_NAME - 1);
|
|---|
| 1207 | if (cwcName > 0)
|
|---|
| 1208 | {
|
|---|
| 1209 | /** @todo check that it actually doesn't exists before we add it. We should not
|
|---|
| 1210 | * trust the directory enumeration here, or maybe we should?? */
|
|---|
| 1211 |
|
|---|
| 1212 | PKFSOBJ pMissing = kFsCacheCreateObject(pCache, pParent, pchName, cchName, wszName, cwcName,
|
|---|
| 1213 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1214 | NULL, 0, NULL, 0,
|
|---|
| 1215 | #endif
|
|---|
| 1216 | KFSOBJ_TYPE_MISSING, penmError);
|
|---|
| 1217 | if (pMissing)
|
|---|
| 1218 | {
|
|---|
| 1219 | KBOOL fRc = kFsCacheDirAddChild(pCache, pParent, pMissing, penmError);
|
|---|
| 1220 | kFsCacheObjRelease(pCache, pMissing);
|
|---|
| 1221 | return fRc ? pMissing : NULL;
|
|---|
| 1222 | }
|
|---|
| 1223 | return NULL;
|
|---|
| 1224 | }
|
|---|
| 1225 | *penmError = KFSLOOKUPERROR_UTF16_CONVERSION_ERROR;
|
|---|
| 1226 | return NULL;
|
|---|
| 1227 | }
|
|---|
| 1228 |
|
|---|
| 1229 |
|
|---|
| 1230 | /**
|
|---|
| 1231 | * Creates a missing object, UTF-16 version.
|
|---|
| 1232 | *
|
|---|
| 1233 | * This is used for caching negative results.
|
|---|
| 1234 | *
|
|---|
| 1235 | * @returns Pointer to the newly created object on success (already linked into
|
|---|
| 1236 | * pParent). No reference.
|
|---|
| 1237 | *
|
|---|
| 1238 | * NULL on failure.
|
|---|
| 1239 | *
|
|---|
| 1240 | * @param pCache The cache.
|
|---|
| 1241 | * @param pParent The parent directory.
|
|---|
| 1242 | * @param pwcName The name.
|
|---|
| 1243 | * @param cwcName The length of the name.
|
|---|
| 1244 | * @param penmError Where to return failure explanations.
|
|---|
| 1245 | */
|
|---|
| 1246 | static PKFSOBJ kFsCacheCreateMissingW(PKFSCACHE pCache, PKFSDIR pParent, const wchar_t *pwcName, KU32 cwcName,
|
|---|
| 1247 | KFSLOOKUPERROR *penmError)
|
|---|
| 1248 | {
|
|---|
| 1249 | /** @todo check that it actually doesn't exists before we add it. We should not
|
|---|
| 1250 | * trust the directory enumeration here, or maybe we should?? */
|
|---|
| 1251 | PKFSOBJ pMissing = kFsCacheCreateObjectW(pCache, pParent, pwcName, cwcName,
|
|---|
| 1252 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1253 | NULL, 0,
|
|---|
| 1254 | #endif
|
|---|
| 1255 | KFSOBJ_TYPE_MISSING, penmError);
|
|---|
| 1256 | if (pMissing)
|
|---|
| 1257 | {
|
|---|
| 1258 | KBOOL fRc = kFsCacheDirAddChild(pCache, pParent, pMissing, penmError);
|
|---|
| 1259 | kFsCacheObjRelease(pCache, pMissing);
|
|---|
| 1260 | return fRc ? pMissing : NULL;
|
|---|
| 1261 | }
|
|---|
| 1262 | return NULL;
|
|---|
| 1263 | }
|
|---|
| 1264 |
|
|---|
| 1265 |
|
|---|
| 1266 | /**
|
|---|
| 1267 | * Does the initial directory populating or refreshes it if it has been
|
|---|
| 1268 | * invalidated.
|
|---|
| 1269 | *
|
|---|
| 1270 | * This assumes the parent directory is opened.
|
|---|
| 1271 | *
|
|---|
| 1272 | * @returns K_TRUE on success, K_FALSE on error.
|
|---|
| 1273 | * @param pCache The cache.
|
|---|
| 1274 | * @param pDir The directory.
|
|---|
| 1275 | * @param penmError Where to store K_FALSE explanation.
|
|---|
| 1276 | */
|
|---|
| 1277 | static KBOOL kFsCachePopuplateOrRefreshDir(PKFSCACHE pCache, PKFSDIR pDir, KFSLOOKUPERROR *penmError)
|
|---|
| 1278 | {
|
|---|
| 1279 | KBOOL fRefreshing = K_FALSE;
|
|---|
| 1280 | /** @todo will have to make this more flexible wrt information classes since
|
|---|
| 1281 | * older windows versions (XP, w2K) might not correctly support the
|
|---|
| 1282 | * ones with file ID on all file systems. */
|
|---|
| 1283 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1284 | MY_FILE_INFORMATION_CLASS const enmInfoClassWithId = MyFileIdBothDirectoryInformation;
|
|---|
| 1285 | MY_FILE_INFORMATION_CLASS enmInfoClass = MyFileIdBothDirectoryInformation;
|
|---|
| 1286 | #else
|
|---|
| 1287 | MY_FILE_INFORMATION_CLASS const enmInfoClassWithId = MyFileIdFullDirectoryInformation;
|
|---|
| 1288 | MY_FILE_INFORMATION_CLASS enmInfoClass = MyFileIdFullDirectoryInformation;
|
|---|
| 1289 | #endif
|
|---|
| 1290 | MY_NTSTATUS rcNt;
|
|---|
| 1291 | MY_IO_STATUS_BLOCK Ios;
|
|---|
| 1292 | union
|
|---|
| 1293 | {
|
|---|
| 1294 | /* Include the structures for better alignment. */
|
|---|
| 1295 | MY_FILE_ID_BOTH_DIR_INFORMATION WithId;
|
|---|
| 1296 | MY_FILE_ID_FULL_DIR_INFORMATION NoId;
|
|---|
| 1297 | /* Buffer padding. We're using a 56KB buffer here to avoid size troubles with CIFS and such. */
|
|---|
| 1298 | KU8 abBuf[56*1024];
|
|---|
| 1299 | } uBuf;
|
|---|
| 1300 |
|
|---|
| 1301 | /*
|
|---|
| 1302 | * Open the directory.
|
|---|
| 1303 | */
|
|---|
| 1304 | if (pDir->hDir == INVALID_HANDLE_VALUE)
|
|---|
| 1305 | {
|
|---|
| 1306 | MY_OBJECT_ATTRIBUTES ObjAttr;
|
|---|
| 1307 | MY_UNICODE_STRING UniStr;
|
|---|
| 1308 |
|
|---|
| 1309 | kHlpAssert(!pDir->fPopulated);
|
|---|
| 1310 |
|
|---|
| 1311 | Ios.Information = -1;
|
|---|
| 1312 | Ios.u.Status = -1;
|
|---|
| 1313 |
|
|---|
| 1314 | UniStr.Buffer = (wchar_t *)pDir->Obj.pwszName;
|
|---|
| 1315 | UniStr.Length = (USHORT)(pDir->Obj.cwcName * sizeof(wchar_t));
|
|---|
| 1316 | UniStr.MaximumLength = UniStr.Length + sizeof(wchar_t);
|
|---|
| 1317 |
|
|---|
| 1318 | kHlpAssertStmtReturn(pDir->Obj.pParent, *penmError = KFSLOOKUPERROR_INTERNAL_ERROR, K_FALSE);
|
|---|
| 1319 | kHlpAssertStmtReturn(pDir->Obj.pParent->hDir != INVALID_HANDLE_VALUE, *penmError = KFSLOOKUPERROR_INTERNAL_ERROR, K_FALSE);
|
|---|
| 1320 | MyInitializeObjectAttributes(&ObjAttr, &UniStr, OBJ_CASE_INSENSITIVE, pDir->Obj.pParent->hDir, NULL /*pSecAttr*/);
|
|---|
| 1321 |
|
|---|
| 1322 | /** @todo FILE_OPEN_REPARSE_POINT? */
|
|---|
| 1323 | rcNt = g_pfnNtCreateFile(&pDir->hDir,
|
|---|
| 1324 | FILE_READ_DATA | FILE_LIST_DIRECTORY | FILE_READ_ATTRIBUTES | SYNCHRONIZE,
|
|---|
| 1325 | &ObjAttr,
|
|---|
| 1326 | &Ios,
|
|---|
| 1327 | NULL, /*cbFileInitialAlloc */
|
|---|
| 1328 | FILE_ATTRIBUTE_NORMAL,
|
|---|
| 1329 | FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
|
|---|
| 1330 | FILE_OPEN,
|
|---|
| 1331 | FILE_DIRECTORY_FILE | FILE_OPEN_FOR_BACKUP_INTENT | FILE_SYNCHRONOUS_IO_NONALERT,
|
|---|
| 1332 | NULL, /*pEaBuffer*/
|
|---|
| 1333 | 0); /*cbEaBuffer*/
|
|---|
| 1334 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1335 | { /* likely */ }
|
|---|
| 1336 | else
|
|---|
| 1337 | {
|
|---|
| 1338 | pDir->hDir = INVALID_HANDLE_VALUE;
|
|---|
| 1339 | *penmError = KFSLOOKUPERROR_DIR_OPEN_ERROR;
|
|---|
| 1340 | return K_FALSE;
|
|---|
| 1341 | }
|
|---|
| 1342 | }
|
|---|
| 1343 | else if (pDir->fPopulated)
|
|---|
| 1344 | {
|
|---|
| 1345 | /** @todo refreshing directories. */
|
|---|
| 1346 | __debugbreak();
|
|---|
| 1347 | fRefreshing = K_TRUE;
|
|---|
| 1348 | }
|
|---|
| 1349 |
|
|---|
| 1350 |
|
|---|
| 1351 | /*
|
|---|
| 1352 | * Enumerate the directory content.
|
|---|
| 1353 | */
|
|---|
| 1354 | Ios.Information = -1;
|
|---|
| 1355 | Ios.u.Status = -1;
|
|---|
| 1356 | rcNt = g_pfnNtQueryDirectoryFile(pDir->hDir,
|
|---|
| 1357 | NULL, /* hEvent */
|
|---|
| 1358 | NULL, /* pfnApcComplete */
|
|---|
| 1359 | NULL, /* pvApcCompleteCtx */
|
|---|
| 1360 | &Ios,
|
|---|
| 1361 | &uBuf,
|
|---|
| 1362 | sizeof(uBuf),
|
|---|
| 1363 | enmInfoClass,
|
|---|
| 1364 | FALSE, /* fReturnSingleEntry */
|
|---|
| 1365 | NULL, /* Filter / restart pos. */
|
|---|
| 1366 | TRUE); /* fRestartScan */
|
|---|
| 1367 | while (MY_NT_SUCCESS(rcNt))
|
|---|
| 1368 | {
|
|---|
| 1369 | /*
|
|---|
| 1370 | * Process the entries in the buffer.
|
|---|
| 1371 | */
|
|---|
| 1372 | KSIZE offBuf = 0;
|
|---|
| 1373 | for (;;)
|
|---|
| 1374 | {
|
|---|
| 1375 | union
|
|---|
| 1376 | {
|
|---|
| 1377 | KU8 *pb;
|
|---|
| 1378 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1379 | MY_FILE_ID_BOTH_DIR_INFORMATION *pWithId;
|
|---|
| 1380 | MY_FILE_BOTH_DIR_INFORMATION *pNoId;
|
|---|
| 1381 | #else
|
|---|
| 1382 | MY_FILE_ID_FULL_DIR_INFORMATION *pWithId;
|
|---|
| 1383 | MY_FILE_FULL_DIR_INFORMATION *pNoId;
|
|---|
| 1384 | #endif
|
|---|
| 1385 | } uPtr;
|
|---|
| 1386 | PKFSOBJ pCur;
|
|---|
| 1387 | KU32 offNext;
|
|---|
| 1388 | KU32 cbMinCur;
|
|---|
| 1389 | wchar_t *pwszFilename;
|
|---|
| 1390 |
|
|---|
| 1391 | /* ASSUME only the FileName member differs between the two structures. */
|
|---|
| 1392 | uPtr.pb = &uBuf.abBuf[offBuf];
|
|---|
| 1393 | if (enmInfoClass == enmInfoClassWithId)
|
|---|
| 1394 | {
|
|---|
| 1395 | pwszFilename = &uPtr.pWithId->FileName[0];
|
|---|
| 1396 | cbMinCur = (KU32)((uintptr_t)&uPtr.pWithId->FileName[0] - (uintptr_t)uPtr.pWithId);
|
|---|
| 1397 | cbMinCur += uPtr.pNoId->FileNameLength;
|
|---|
| 1398 | }
|
|---|
| 1399 | else
|
|---|
| 1400 | {
|
|---|
| 1401 | pwszFilename = &uPtr.pNoId->FileName[0];
|
|---|
| 1402 | cbMinCur = (KU32)((uintptr_t)&uPtr.pNoId->FileName[0] - (uintptr_t)uPtr.pNoId);
|
|---|
| 1403 | cbMinCur += uPtr.pNoId->FileNameLength;
|
|---|
| 1404 | }
|
|---|
| 1405 |
|
|---|
| 1406 | /*
|
|---|
| 1407 | * Create the entry (not linked yet).
|
|---|
| 1408 | */
|
|---|
| 1409 | pCur = kFsCacheCreateObjectW(pCache, pDir, pwszFilename, uPtr.pNoId->FileNameLength / sizeof(wchar_t),
|
|---|
| 1410 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1411 | uPtr.pNoId->ShortName, uPtr.pNoId->ShortNameLength / sizeof(wchar_t),
|
|---|
| 1412 | #endif
|
|---|
| 1413 | uPtr.pNoId->FileAttributes & FILE_ATTRIBUTE_DIRECTORY ? KFSOBJ_TYPE_DIR
|
|---|
| 1414 | : uPtr.pNoId->FileAttributes & (FILE_ATTRIBUTE_DEVICE | FILE_ATTRIBUTE_REPARSE_POINT)
|
|---|
| 1415 | ? KFSOBJ_TYPE_OTHER : KFSOBJ_TYPE_FILE,
|
|---|
| 1416 | penmError);
|
|---|
| 1417 | if (!pCur)
|
|---|
| 1418 | return K_FALSE;
|
|---|
| 1419 | kHlpAssert(pCur->cRefs == 1);
|
|---|
| 1420 |
|
|---|
| 1421 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1422 | if (enmInfoClass == enmInfoClassWithId)
|
|---|
| 1423 | birdStatFillFromFileIdBothDirInfo(&pCur->Stats, uPtr.pWithId, pCur->pszName);
|
|---|
| 1424 | else
|
|---|
| 1425 | birdStatFillFromFileBothDirInfo(&pCur->Stats, uPtr.pNoId, pCur->pszName);
|
|---|
| 1426 | #else
|
|---|
| 1427 | if (enmInfoClass == enmInfoClassWithId)
|
|---|
| 1428 | birdStatFillFromFileIdFullDirInfo(&pCur->Stats, uPtr.pWithId, pCur->pszName);
|
|---|
| 1429 | else
|
|---|
| 1430 | birdStatFillFromFileFullDirInfo(&pCur->Stats, uPtr.pNoId, pCur->pszName);
|
|---|
| 1431 | #endif
|
|---|
| 1432 | pCur->Stats.st_dev = pDir->uDevNo;
|
|---|
| 1433 |
|
|---|
| 1434 | /*
|
|---|
| 1435 | * If we're updating we have to check the data.
|
|---|
| 1436 | */
|
|---|
| 1437 | if (fRefreshing)
|
|---|
| 1438 | {
|
|---|
| 1439 | __debugbreak();
|
|---|
| 1440 | }
|
|---|
| 1441 |
|
|---|
| 1442 | /*
|
|---|
| 1443 | * If we've still got pCur, add it to the directory.
|
|---|
| 1444 | */
|
|---|
| 1445 | if (pCur)
|
|---|
| 1446 | {
|
|---|
| 1447 | KBOOL fRc = kFsCacheDirAddChild(pCache, pDir, pCur, penmError);
|
|---|
| 1448 | kFsCacheObjRelease(pCache, pCur);
|
|---|
| 1449 | if (fRc)
|
|---|
| 1450 | { /* likely */ }
|
|---|
| 1451 | else
|
|---|
| 1452 | return K_FALSE;
|
|---|
| 1453 | }
|
|---|
| 1454 |
|
|---|
| 1455 | /*
|
|---|
| 1456 | * Advance.
|
|---|
| 1457 | */
|
|---|
| 1458 | offNext = uPtr.pNoId->NextEntryOffset;
|
|---|
| 1459 | if ( offNext >= cbMinCur
|
|---|
| 1460 | && offNext < sizeof(uBuf))
|
|---|
| 1461 | offBuf += offNext;
|
|---|
| 1462 | else
|
|---|
| 1463 | break;
|
|---|
| 1464 | }
|
|---|
| 1465 |
|
|---|
| 1466 | /*
|
|---|
| 1467 | * Read the next chunk.
|
|---|
| 1468 | */
|
|---|
| 1469 | rcNt = g_pfnNtQueryDirectoryFile(pDir->hDir,
|
|---|
| 1470 | NULL, /* hEvent */
|
|---|
| 1471 | NULL, /* pfnApcComplete */
|
|---|
| 1472 | NULL, /* pvApcCompleteCtx */
|
|---|
| 1473 | &Ios,
|
|---|
| 1474 | &uBuf,
|
|---|
| 1475 | sizeof(uBuf),
|
|---|
| 1476 | enmInfoClass,
|
|---|
| 1477 | FALSE, /* fReturnSingleEntry */
|
|---|
| 1478 | NULL, /* Filter / restart pos. */
|
|---|
| 1479 | FALSE); /* fRestartScan */
|
|---|
| 1480 | }
|
|---|
| 1481 |
|
|---|
| 1482 | if (rcNt == MY_STATUS_NO_MORE_FILES)
|
|---|
| 1483 | return K_TRUE;
|
|---|
| 1484 | kHlpAssertMsgFailed(("%#x\n", rcNt));
|
|---|
| 1485 | *penmError = KFSLOOKUPERROR_DIR_READ_ERROR;
|
|---|
| 1486 | return K_TRUE;
|
|---|
| 1487 | }
|
|---|
| 1488 |
|
|---|
| 1489 |
|
|---|
| 1490 | static KBOOL kFsCacheRefreshMissing(PKFSCACHE pCache, PKFSOBJ pMissing, KFSLOOKUPERROR *penmError)
|
|---|
| 1491 | {
|
|---|
| 1492 | return K_TRUE;
|
|---|
| 1493 | }
|
|---|
| 1494 |
|
|---|
| 1495 |
|
|---|
| 1496 | static KBOOL kFsCacheRefreshMissingIntermediateDir(PKFSCACHE pCache, PKFSOBJ pMissing, KFSLOOKUPERROR *penmError)
|
|---|
| 1497 | {
|
|---|
| 1498 | return K_TRUE;
|
|---|
| 1499 | }
|
|---|
| 1500 |
|
|---|
| 1501 |
|
|---|
| 1502 | static KBOOL kFsCacheRefreshObj(PKFSCACHE pCache, PKFSOBJ pObj, KFSLOOKUPERROR *penmError)
|
|---|
| 1503 | {
|
|---|
| 1504 | return K_FALSE;
|
|---|
| 1505 | }
|
|---|
| 1506 |
|
|---|
| 1507 |
|
|---|
| 1508 |
|
|---|
| 1509 | /**
|
|---|
| 1510 | * Looks up a drive letter.
|
|---|
| 1511 | *
|
|---|
| 1512 | * Will enter the drive if necessary.
|
|---|
| 1513 | *
|
|---|
| 1514 | * @returns Pointer to the root directory of the drive or an update-to-date
|
|---|
| 1515 | * missing node.
|
|---|
| 1516 | * @param pCache The cache.
|
|---|
| 1517 | * @param chLetter The uppercased drive letter.
|
|---|
| 1518 | * @param penmError Where to return details as to why the lookup
|
|---|
| 1519 | * failed.
|
|---|
| 1520 | */
|
|---|
| 1521 | static PKFSOBJ kFswCacheLookupDrive(PKFSCACHE pCache, char chLetter, KFSLOOKUPERROR *penmError)
|
|---|
| 1522 | {
|
|---|
| 1523 | KU32 const uHash = chLetter - 'A';
|
|---|
| 1524 | KU32 cLeft;
|
|---|
| 1525 | PKFSOBJ *ppCur;
|
|---|
| 1526 |
|
|---|
| 1527 | MY_UNICODE_STRING NtPath;
|
|---|
| 1528 | wchar_t wszTmp[8];
|
|---|
| 1529 | MY_NTSTATUS rcNt;
|
|---|
| 1530 | char szTmp[4];
|
|---|
| 1531 |
|
|---|
| 1532 | /*
|
|---|
| 1533 | * Custom drive letter hashing.
|
|---|
| 1534 | */
|
|---|
| 1535 | if (pCache->RootDir.paHashTab)
|
|---|
| 1536 | {
|
|---|
| 1537 | /** @todo PKFSOBJHASH pHash = */
|
|---|
| 1538 | }
|
|---|
| 1539 |
|
|---|
| 1540 | /*
|
|---|
| 1541 | * Special cased lookup.
|
|---|
| 1542 | */
|
|---|
| 1543 | cLeft = pCache->RootDir.cChildren;
|
|---|
| 1544 | ppCur = pCache->RootDir.papChildren;
|
|---|
| 1545 | while (cLeft-- > 0)
|
|---|
| 1546 | {
|
|---|
| 1547 | PKFSOBJ pCur = *ppCur++;
|
|---|
| 1548 | if ( pCur->cchName == 2
|
|---|
| 1549 | && pCur->pszName[0] == chLetter
|
|---|
| 1550 | && pCur->pszName[1] == ':')
|
|---|
| 1551 | {
|
|---|
| 1552 | if (pCur->bObjType == KFSOBJ_TYPE_DIR)
|
|---|
| 1553 | return pCur;
|
|---|
| 1554 | kHlpAssert(pCur->bObjType == KFSOBJ_TYPE_MISSING);
|
|---|
| 1555 | if (kFsCacheRefreshMissingIntermediateDir(pCache, pCur, penmError))
|
|---|
| 1556 | return pCur;
|
|---|
| 1557 | return NULL;
|
|---|
| 1558 | }
|
|---|
| 1559 | }
|
|---|
| 1560 |
|
|---|
| 1561 | /*
|
|---|
| 1562 | * Need to add it. We always keep the drive letters open for the benefit
|
|---|
| 1563 | * of kFsCachePopuplateOrRefreshDir and others.
|
|---|
| 1564 | */
|
|---|
| 1565 | wszTmp[0] = szTmp[0] = chLetter;
|
|---|
| 1566 | wszTmp[1] = szTmp[1] = ':';
|
|---|
| 1567 | wszTmp[2] = szTmp[2] = '\\';
|
|---|
| 1568 | wszTmp[3] = '.';
|
|---|
| 1569 | wszTmp[4] = '\0';
|
|---|
| 1570 | szTmp[2] = '\0';
|
|---|
| 1571 |
|
|---|
| 1572 | NtPath.Buffer = NULL;
|
|---|
| 1573 | NtPath.Length = 0;
|
|---|
| 1574 | NtPath.MaximumLength = 0;
|
|---|
| 1575 | if (g_pfnRtlDosPathNameToNtPathName_U(wszTmp, &NtPath, NULL, NULL))
|
|---|
| 1576 | {
|
|---|
| 1577 | HANDLE hDir;
|
|---|
| 1578 | rcNt = birdOpenFileUniStr(&NtPath,
|
|---|
| 1579 | FILE_READ_DATA | FILE_LIST_DIRECTORY | FILE_READ_ATTRIBUTES | SYNCHRONIZE,
|
|---|
| 1580 | FILE_ATTRIBUTE_NORMAL,
|
|---|
| 1581 | FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
|
|---|
| 1582 | FILE_OPEN,
|
|---|
| 1583 | FILE_DIRECTORY_FILE | FILE_OPEN_FOR_BACKUP_INTENT | FILE_SYNCHRONOUS_IO_NONALERT,
|
|---|
| 1584 | OBJ_CASE_INSENSITIVE,
|
|---|
| 1585 | &hDir);
|
|---|
| 1586 | birdFreeNtPath(&NtPath);
|
|---|
| 1587 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1588 | {
|
|---|
| 1589 | PKFSDIR pDir = (PKFSDIR)kFsCacheCreateObject(pCache, &pCache->RootDir, szTmp, 2, wszTmp, 2,
|
|---|
| 1590 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1591 | NULL, 0, NULL, 0,
|
|---|
| 1592 | #endif
|
|---|
| 1593 | KFSOBJ_TYPE_DIR, penmError);
|
|---|
| 1594 | if (pDir)
|
|---|
| 1595 | {
|
|---|
| 1596 | /*
|
|---|
| 1597 | * We need a little bit of extra info for a drive root. These things are typically
|
|---|
| 1598 | * inherited by subdirectories down the tree, so, we do it all here for till that changes.
|
|---|
| 1599 | */
|
|---|
| 1600 | union
|
|---|
| 1601 | {
|
|---|
| 1602 | MY_FILE_FS_VOLUME_INFORMATION VolInfo;
|
|---|
| 1603 | MY_FILE_FS_ATTRIBUTE_INFORMATION FsAttrInfo;
|
|---|
| 1604 | char abPadding[sizeof(MY_FILE_FS_VOLUME_INFORMATION) + 512];
|
|---|
| 1605 | } uBuf;
|
|---|
| 1606 | MY_IO_STATUS_BLOCK Ios;
|
|---|
| 1607 | KBOOL fRc;
|
|---|
| 1608 |
|
|---|
| 1609 | kHlpAssert(pDir->hDir == INVALID_HANDLE_VALUE);
|
|---|
| 1610 | pDir->hDir = hDir;
|
|---|
| 1611 |
|
|---|
| 1612 | /* Get the device number. */
|
|---|
| 1613 | rcNt = birdQueryVolumeDeviceNumber(hDir, &uBuf.VolInfo, sizeof(uBuf), &pDir->uDevNo);
|
|---|
| 1614 | kHlpAssertMsg(MY_NT_SUCCESS(rcNt), ("%#x\n", rcNt));
|
|---|
| 1615 |
|
|---|
| 1616 | /* Get the file system. */
|
|---|
| 1617 | pDir->Obj.fFlags &= ~(KFSOBJ_F_NTFS | KFSOBJ_F_WORKING_DIR_MTIME);
|
|---|
| 1618 | Ios.Information = -1;
|
|---|
| 1619 | Ios.u.Status = -1;
|
|---|
| 1620 | rcNt = g_pfnNtQueryVolumeInformationFile(hDir, &Ios, &uBuf.FsAttrInfo, sizeof(uBuf),
|
|---|
| 1621 | MyFileFsAttributeInformation);
|
|---|
| 1622 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1623 | rcNt = Ios.u.Status;
|
|---|
| 1624 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1625 | {
|
|---|
| 1626 | if ( uBuf.FsAttrInfo.FileSystemName[0] == 'N'
|
|---|
| 1627 | && uBuf.FsAttrInfo.FileSystemName[1] == 'T'
|
|---|
| 1628 | && uBuf.FsAttrInfo.FileSystemName[2] == 'F'
|
|---|
| 1629 | && uBuf.FsAttrInfo.FileSystemName[3] == 'S'
|
|---|
| 1630 | && uBuf.FsAttrInfo.FileSystemName[4] == '\0')
|
|---|
| 1631 | {
|
|---|
| 1632 | DWORD dwDriveType = GetDriveTypeW(wszTmp);
|
|---|
| 1633 | if ( dwDriveType == DRIVE_FIXED
|
|---|
| 1634 | || dwDriveType == DRIVE_RAMDISK)
|
|---|
| 1635 | pDir->Obj.fFlags |= KFSOBJ_F_NTFS | KFSOBJ_F_WORKING_DIR_MTIME;
|
|---|
| 1636 | }
|
|---|
| 1637 | }
|
|---|
| 1638 |
|
|---|
| 1639 | /*
|
|---|
| 1640 | * Link the new drive letter into the root dir.
|
|---|
| 1641 | */
|
|---|
| 1642 | fRc = kFsCacheDirAddChild(pCache, &pCache->RootDir, &pDir->Obj, penmError);
|
|---|
| 1643 | kFsCacheObjRelease(pCache, &pDir->Obj);
|
|---|
| 1644 | return fRc ? &pDir->Obj : NULL;
|
|---|
| 1645 | }
|
|---|
| 1646 |
|
|---|
| 1647 | g_pfnNtClose(hDir);
|
|---|
| 1648 | return NULL;
|
|---|
| 1649 | }
|
|---|
| 1650 |
|
|---|
| 1651 | /* Assume it doesn't exist if this happens... This may be a little to
|
|---|
| 1652 | restrictive wrt status code checks. */
|
|---|
| 1653 | kHlpAssertMsgStmtReturn( rcNt == MY_STATUS_OBJECT_NAME_NOT_FOUND
|
|---|
| 1654 | || rcNt == MY_STATUS_OBJECT_PATH_NOT_FOUND
|
|---|
| 1655 | || rcNt == MY_STATUS_OBJECT_PATH_INVALID
|
|---|
| 1656 | || rcNt == MY_STATUS_OBJECT_PATH_SYNTAX_BAD,
|
|---|
| 1657 | ("%#x\n", rcNt),
|
|---|
| 1658 | *penmError = KFSLOOKUPERROR_DIR_OPEN_ERROR,
|
|---|
| 1659 | NULL);
|
|---|
| 1660 | }
|
|---|
| 1661 | else
|
|---|
| 1662 | {
|
|---|
| 1663 | kHlpAssertFailed();
|
|---|
| 1664 | *penmError = KFSLOOKUPERROR_OUT_OF_MEMORY;
|
|---|
| 1665 | return NULL;
|
|---|
| 1666 | }
|
|---|
| 1667 |
|
|---|
| 1668 | /*
|
|---|
| 1669 | * Maybe create a missing entry.
|
|---|
| 1670 | */
|
|---|
| 1671 | if (pCache->fFlags & KFSCACHE_F_MISSING_OBJECTS)
|
|---|
| 1672 | {
|
|---|
| 1673 | PKFSOBJ pMissing = kFsCacheCreateObject(pCache, &pCache->RootDir, szTmp, 2, wszTmp, 2,
|
|---|
| 1674 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1675 | NULL, 0, NULL, 0,
|
|---|
| 1676 | #endif
|
|---|
| 1677 | KFSOBJ_TYPE_MISSING, penmError);
|
|---|
| 1678 | if (pMissing)
|
|---|
| 1679 | {
|
|---|
| 1680 | KBOOL fRc = kFsCacheDirAddChild(pCache, &pCache->RootDir, pMissing, penmError);
|
|---|
| 1681 | kFsCacheObjRelease(pCache, pMissing);
|
|---|
| 1682 | return fRc ? pMissing : NULL;
|
|---|
| 1683 | }
|
|---|
| 1684 | }
|
|---|
| 1685 | else
|
|---|
| 1686 | {
|
|---|
| 1687 | /** @todo this isn't necessary correct for a root spec. */
|
|---|
| 1688 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_FOUND;
|
|---|
| 1689 | }
|
|---|
| 1690 | return NULL;
|
|---|
| 1691 | }
|
|---|
| 1692 |
|
|---|
| 1693 |
|
|---|
| 1694 | /**
|
|---|
| 1695 | * Look up a child node, ANSI version.
|
|---|
| 1696 | *
|
|---|
| 1697 | * @returns Pointer to the child if found, NULL if not.
|
|---|
| 1698 | * @param pCache The cache.
|
|---|
| 1699 | * @param pParent The parent directory to search.
|
|---|
| 1700 | * @param pchName The child name to search for (not terminated).
|
|---|
| 1701 | * @param cchName The length of the child name.
|
|---|
| 1702 | */
|
|---|
| 1703 | static PKFSOBJ kFsCacheFindChildA(PKFSCACHE pCache, PKFSDIR pParent, const char *pchName, KU32 cchName)
|
|---|
| 1704 | {
|
|---|
| 1705 | /* Check for '.' first. */
|
|---|
| 1706 | if (cchName != 1 || *pchName != '.')
|
|---|
| 1707 | {
|
|---|
| 1708 | KU32 cLeft;
|
|---|
| 1709 | PKFSOBJ *ppCur;
|
|---|
| 1710 |
|
|---|
| 1711 | if (pParent->paHashTab != NULL)
|
|---|
| 1712 | {
|
|---|
| 1713 | /** @todo directory hash table lookup. */
|
|---|
| 1714 | }
|
|---|
| 1715 |
|
|---|
| 1716 | /* Linear search. */
|
|---|
| 1717 | cLeft = pParent->cChildren;
|
|---|
| 1718 | ppCur = pParent->papChildren;
|
|---|
| 1719 | while (cLeft-- > 0)
|
|---|
| 1720 | {
|
|---|
| 1721 | PKFSOBJ pCur = *ppCur++;
|
|---|
| 1722 | if ( ( pCur->cchName == cchName
|
|---|
| 1723 | && _mbsnicmp(pCur->pszName, pchName, cchName) == 0)
|
|---|
| 1724 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1725 | || ( pCur->cchShortName == cchName
|
|---|
| 1726 | && pCur->pszShortName != pCur->pszName
|
|---|
| 1727 | && _mbsnicmp(pCur->pszShortName, pchName, cchName) == 0)
|
|---|
| 1728 | #endif
|
|---|
| 1729 | )
|
|---|
| 1730 | return pCur;
|
|---|
| 1731 | }
|
|---|
| 1732 | return NULL;
|
|---|
| 1733 | }
|
|---|
| 1734 | return &pParent->Obj;
|
|---|
| 1735 | }
|
|---|
| 1736 |
|
|---|
| 1737 |
|
|---|
| 1738 | /**
|
|---|
| 1739 | * For use when kFsCacheIAreEqualW hit's something non-trivial.
|
|---|
| 1740 | *
|
|---|
| 1741 | * @returns K_TRUE if equal, K_FALSE if different.
|
|---|
| 1742 | * @param pwcName1 The first string.
|
|---|
| 1743 | * @param pwcName2 The second string.
|
|---|
| 1744 | * @param cwcName The length of the two strings (in wchar_t's).
|
|---|
| 1745 | */
|
|---|
| 1746 | KBOOL kFsCacheIAreEqualSlowW(const wchar_t *pwcName1, const wchar_t *pwcName2, KU16 cwcName)
|
|---|
| 1747 | {
|
|---|
| 1748 | MY_UNICODE_STRING UniStr1 = { cwcName * sizeof(wchar_t), cwcName * sizeof(wchar_t), (wchar_t *)pwcName1 };
|
|---|
| 1749 | MY_UNICODE_STRING UniStr2 = { cwcName * sizeof(wchar_t), cwcName * sizeof(wchar_t), (wchar_t *)pwcName2 };
|
|---|
| 1750 | return g_pfnRtlEqualUnicodeString(&UniStr1, &UniStr2, TRUE /*fCaseInsensitive*/);
|
|---|
| 1751 | }
|
|---|
| 1752 |
|
|---|
| 1753 |
|
|---|
| 1754 | /**
|
|---|
| 1755 | * Compares two UTF-16 strings in a case-insensitive fashion.
|
|---|
| 1756 | *
|
|---|
| 1757 | * You would think we should be using _wscnicmp here instead, however it is
|
|---|
| 1758 | * locale dependent and defaults to ASCII upper/lower handling setlocale hasn't
|
|---|
| 1759 | * been called.
|
|---|
| 1760 | *
|
|---|
| 1761 | * @returns K_TRUE if equal, K_FALSE if different.
|
|---|
| 1762 | * @param pwcName1 The first string.
|
|---|
| 1763 | * @param pwcName2 The second string.
|
|---|
| 1764 | * @param cwcName The length of the two strings (in wchar_t's).
|
|---|
| 1765 | */
|
|---|
| 1766 | K_INLINE KBOOL kFsCacheIAreEqualW(const wchar_t *pwcName1, const wchar_t *pwcName2, KU32 cwcName)
|
|---|
| 1767 | {
|
|---|
| 1768 | while (cwcName > 0)
|
|---|
| 1769 | {
|
|---|
| 1770 | wchar_t wc1 = *pwcName1;
|
|---|
| 1771 | wchar_t wc2 = *pwcName2;
|
|---|
| 1772 | if (wc1 == wc2)
|
|---|
| 1773 | { /* not unlikely */ }
|
|---|
| 1774 | else if ( (KU16)wc1 < (KU16)0xc0 /* U+00C0 is the first upper/lower letter after 'z'. */
|
|---|
| 1775 | && (KU16)wc2 < (KU16)0xc0)
|
|---|
| 1776 | {
|
|---|
| 1777 | /* ASCII upper case. */
|
|---|
| 1778 | if ((KU16)wc1 - (KU16)0x61 < (KU16)26)
|
|---|
| 1779 | wc1 &= ~(wchar_t)0x20;
|
|---|
| 1780 | if ((KU16)wc2 - (KU16)0x61 < (KU16)26)
|
|---|
| 1781 | wc2 &= ~(wchar_t)0x20;
|
|---|
| 1782 | if (wc1 != wc2)
|
|---|
| 1783 | return K_FALSE;
|
|---|
| 1784 | }
|
|---|
| 1785 | else
|
|---|
| 1786 | return kFsCacheIAreEqualSlowW(pwcName1, pwcName2, (KU16)cwcName);
|
|---|
| 1787 |
|
|---|
| 1788 | pwcName2++;
|
|---|
| 1789 | pwcName1++;
|
|---|
| 1790 | cwcName--;
|
|---|
| 1791 | }
|
|---|
| 1792 |
|
|---|
| 1793 | return K_TRUE;
|
|---|
| 1794 | }
|
|---|
| 1795 |
|
|---|
| 1796 |
|
|---|
| 1797 | /**
|
|---|
| 1798 | * Look up a child node, UTF-16 version.
|
|---|
| 1799 | *
|
|---|
| 1800 | * @returns Pointer to the child if found, NULL if not.
|
|---|
| 1801 | * @param pCache The cache.
|
|---|
| 1802 | * @param pParent The parent directory to search.
|
|---|
| 1803 | * @param pwcName The child name to search for (not terminated).
|
|---|
| 1804 | * @param cwcName The length of the child name (in wchar_t's).
|
|---|
| 1805 | */
|
|---|
| 1806 | static PKFSOBJ kFsCacheFindChildW(PKFSCACHE pCache, PKFSDIR pParent, const wchar_t *pwcName, KU32 cwcName)
|
|---|
| 1807 | {
|
|---|
| 1808 | /* Check for '.' first. */
|
|---|
| 1809 | if (cwcName != 1 || *pwcName != '.')
|
|---|
| 1810 | {
|
|---|
| 1811 | KU32 cLeft;
|
|---|
| 1812 | PKFSOBJ *ppCur;
|
|---|
| 1813 |
|
|---|
| 1814 | if (pParent->paHashTab != NULL)
|
|---|
| 1815 | {
|
|---|
| 1816 | /** @todo directory hash table lookup. */
|
|---|
| 1817 | }
|
|---|
| 1818 |
|
|---|
| 1819 | /* Linear search. */
|
|---|
| 1820 | cLeft = pParent->cChildren;
|
|---|
| 1821 | ppCur = pParent->papChildren;
|
|---|
| 1822 | while (cLeft-- > 0)
|
|---|
| 1823 | {
|
|---|
| 1824 | PKFSOBJ pCur = *ppCur++;
|
|---|
| 1825 | if ( ( pCur->cwcName == cwcName
|
|---|
| 1826 | && kFsCacheIAreEqualW(pCur->pwszName, pwcName, cwcName))
|
|---|
| 1827 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1828 | || ( pCur->cwcShortName == cwcName
|
|---|
| 1829 | && pCur->pwszShortName != pCur->pwszName
|
|---|
| 1830 | && kFsCacheIAreEqualW(pCur->pwszShortName, pwcName, cwcName))
|
|---|
| 1831 | #endif
|
|---|
| 1832 | )
|
|---|
| 1833 | return pCur;
|
|---|
| 1834 | }
|
|---|
| 1835 | return NULL;
|
|---|
| 1836 | }
|
|---|
| 1837 | return &pParent->Obj;
|
|---|
| 1838 | }
|
|---|
| 1839 |
|
|---|
| 1840 |
|
|---|
| 1841 | /**
|
|---|
| 1842 | * Looks up a UNC share, ANSI version.
|
|---|
| 1843 | *
|
|---|
| 1844 | * We keep both the server and share in the root directory entry. This means we
|
|---|
| 1845 | * have to clean up the entry name before we can insert it.
|
|---|
| 1846 | *
|
|---|
| 1847 | * @returns Pointer to the share root directory or an update-to-date missing
|
|---|
| 1848 | * node.
|
|---|
| 1849 | * @param pCache The cache.
|
|---|
| 1850 | * @param pszPath The path.
|
|---|
| 1851 | * @param poff Where to return the root dire.
|
|---|
| 1852 | * @param penmError Where to return details as to why the lookup
|
|---|
| 1853 | * failed.
|
|---|
| 1854 | */
|
|---|
| 1855 | static PKFSOBJ kFswCacheLookupUncShareA(PKFSCACHE pCache, const char *pszPath, KU32 *poff, KFSLOOKUPERROR *penmError)
|
|---|
| 1856 | {
|
|---|
| 1857 | #if 0 /* later */
|
|---|
| 1858 | KU32 offStartServer;
|
|---|
| 1859 | KU32 offEndServer;
|
|---|
| 1860 | KU32 offStartShare;
|
|---|
| 1861 |
|
|---|
| 1862 | KU32 offEnd = 2;
|
|---|
| 1863 | while (IS_SLASH(pszPath[offEnd]))
|
|---|
| 1864 | offEnd++;
|
|---|
| 1865 |
|
|---|
| 1866 | offStartServer = offEnd;
|
|---|
| 1867 | while ( (ch = pszPath[offEnd]) != '\0'
|
|---|
| 1868 | && !IS_SLASH(ch))
|
|---|
| 1869 | offEnd++;
|
|---|
| 1870 | offEndServer = offEnd;
|
|---|
| 1871 |
|
|---|
| 1872 | if (ch != '\0')
|
|---|
| 1873 | { /* likely */ }
|
|---|
| 1874 | else
|
|---|
| 1875 | {
|
|---|
| 1876 | *penmError = KFSLOOKUPERROR_NOT_FOUND;
|
|---|
| 1877 | return NULL;
|
|---|
| 1878 | }
|
|---|
| 1879 |
|
|---|
| 1880 | while (IS_SLASH(pszPath[offEnd]))
|
|---|
| 1881 | offEnd++;
|
|---|
| 1882 | offStartServer = offEnd;
|
|---|
| 1883 | while ( (ch = pszPath[offEnd]) != '\0'
|
|---|
| 1884 | && !IS_SLASH(ch))
|
|---|
| 1885 | offEnd++;
|
|---|
| 1886 | #endif
|
|---|
| 1887 | *penmError = KFSLOOKUPERROR_UNSUPPORTED;
|
|---|
| 1888 | return NULL;
|
|---|
| 1889 | }
|
|---|
| 1890 |
|
|---|
| 1891 |
|
|---|
| 1892 | /**
|
|---|
| 1893 | * Looks up a UNC share, UTF-16 version.
|
|---|
| 1894 | *
|
|---|
| 1895 | * We keep both the server and share in the root directory entry. This means we
|
|---|
| 1896 | * have to clean up the entry name before we can insert it.
|
|---|
| 1897 | *
|
|---|
| 1898 | * @returns Pointer to the share root directory or an update-to-date missing
|
|---|
| 1899 | * node.
|
|---|
| 1900 | * @param pCache The cache.
|
|---|
| 1901 | * @param pwszPath The path.
|
|---|
| 1902 | * @param poff Where to return the root dire.
|
|---|
| 1903 | * @param penmError Where to return details as to why the lookup
|
|---|
| 1904 | * failed.
|
|---|
| 1905 | */
|
|---|
| 1906 | static PKFSOBJ kFswCacheLookupUncShareW(PKFSCACHE pCache, const wchar_t *pwszPath, KU32 *poff, KFSLOOKUPERROR *penmError)
|
|---|
| 1907 | {
|
|---|
| 1908 | #if 0 /* later */
|
|---|
| 1909 | KU32 offStartServer;
|
|---|
| 1910 | KU32 offEndServer;
|
|---|
| 1911 | KU32 offStartShare;
|
|---|
| 1912 |
|
|---|
| 1913 | KU32 offEnd = 2;
|
|---|
| 1914 | while (IS_SLASH(pwszPath[offEnd]))
|
|---|
| 1915 | offEnd++;
|
|---|
| 1916 |
|
|---|
| 1917 | offStartServer = offEnd;
|
|---|
| 1918 | while ( (ch = pwszPath[offEnd]) != '\0'
|
|---|
| 1919 | && !IS_SLASH(ch))
|
|---|
| 1920 | offEnd++;
|
|---|
| 1921 | offEndServer = offEnd;
|
|---|
| 1922 |
|
|---|
| 1923 | if (ch != '\0')
|
|---|
| 1924 | { /* likely */ }
|
|---|
| 1925 | else
|
|---|
| 1926 | {
|
|---|
| 1927 | *penmError = KFSLOOKUPERROR_NOT_FOUND;
|
|---|
| 1928 | return NULL;
|
|---|
| 1929 | }
|
|---|
| 1930 |
|
|---|
| 1931 | while (IS_SLASH(pwszPath[offEnd]))
|
|---|
| 1932 | offEnd++;
|
|---|
| 1933 | offStartServer = offEnd;
|
|---|
| 1934 | while ( (ch = pwszPath[offEnd]) != '\0'
|
|---|
| 1935 | && !IS_SLASH(ch))
|
|---|
| 1936 | offEnd++;
|
|---|
| 1937 | #endif
|
|---|
| 1938 | *penmError = KFSLOOKUPERROR_UNSUPPORTED;
|
|---|
| 1939 | return NULL;
|
|---|
| 1940 | }
|
|---|
| 1941 |
|
|---|
| 1942 |
|
|---|
| 1943 | /**
|
|---|
| 1944 | * Walk the file system tree for the given absolute path, entering it into the
|
|---|
| 1945 | * hash table.
|
|---|
| 1946 | *
|
|---|
| 1947 | * This will create any missing nodes while walking.
|
|---|
| 1948 | *
|
|---|
| 1949 | * The caller will have to do the path hash table insertion of the result.
|
|---|
| 1950 | *
|
|---|
| 1951 | * @returns Pointer to the tree node corresponding to @a pszPath.
|
|---|
| 1952 | * NULL on lookup failure, see @a penmError for details.
|
|---|
| 1953 | * @param pCache The cache.
|
|---|
| 1954 | * @param pszPath The path to walk.
|
|---|
| 1955 | * @param cchPath The length of the path.
|
|---|
| 1956 | * @param penmError Where to return details as to why the lookup
|
|---|
| 1957 | * failed.
|
|---|
| 1958 | */
|
|---|
| 1959 | static PKFSOBJ kFsCacheLookupAbsoluteA(PKFSCACHE pCache, const char *pszPath, KU32 cchPath, KFSLOOKUPERROR *penmError)
|
|---|
| 1960 | {
|
|---|
| 1961 | PKFSDIR pParent = &pCache->RootDir;
|
|---|
| 1962 | PKFSOBJ pChild;
|
|---|
| 1963 | KU32 off;
|
|---|
| 1964 | KU32 cchSlashes;
|
|---|
| 1965 | KU32 offEnd;
|
|---|
| 1966 |
|
|---|
| 1967 | KFSCACHE_LOG(("kFsCacheLookupAbsoluteA(%s)\n", pszPath));
|
|---|
| 1968 |
|
|---|
| 1969 | /*
|
|---|
| 1970 | * The root "directory" needs special handling, so we keep it outside the
|
|---|
| 1971 | * main search loop. (Special: Cannot enumerate it, UNCs, ++.)
|
|---|
| 1972 | */
|
|---|
| 1973 | cchSlashes = 0;
|
|---|
| 1974 | off = 0;
|
|---|
| 1975 | if ( pszPath[1] == ':'
|
|---|
| 1976 | && IS_ALPHA(pszPath[0]))
|
|---|
| 1977 | {
|
|---|
| 1978 | /* Drive letter. */
|
|---|
| 1979 | offEnd = 2;
|
|---|
| 1980 | kHlpAssert(IS_SLASH(pszPath[2]));
|
|---|
| 1981 | pChild = kFswCacheLookupDrive(pCache, toupper(pszPath[0]), penmError);
|
|---|
| 1982 | }
|
|---|
| 1983 | else if ( IS_SLASH(pszPath[0])
|
|---|
| 1984 | && IS_SLASH(pszPath[1]) )
|
|---|
| 1985 | pChild = kFswCacheLookupUncShareA(pCache, pszPath, &offEnd, penmError);
|
|---|
| 1986 | else
|
|---|
| 1987 | {
|
|---|
| 1988 | *penmError = KFSLOOKUPERROR_UNSUPPORTED;
|
|---|
| 1989 | return NULL;
|
|---|
| 1990 | }
|
|---|
| 1991 | if (pChild)
|
|---|
| 1992 | { /* likely */ }
|
|---|
| 1993 | else
|
|---|
| 1994 | return NULL;
|
|---|
| 1995 |
|
|---|
| 1996 | /* Count slashes trailing the root spec. */
|
|---|
| 1997 | if (offEnd < cchPath)
|
|---|
| 1998 | {
|
|---|
| 1999 | kHlpAssert(IS_SLASH(pszPath[offEnd]));
|
|---|
| 2000 | do
|
|---|
| 2001 | cchSlashes++;
|
|---|
| 2002 | while (IS_SLASH(pszPath[offEnd + cchSlashes]));
|
|---|
| 2003 | }
|
|---|
| 2004 |
|
|---|
| 2005 | /* Done already? */
|
|---|
| 2006 | if (offEnd >= cchPath)
|
|---|
| 2007 | {
|
|---|
| 2008 | if ( pChild->uCacheGen == KFSWOBJ_CACHE_GEN_IGNORE
|
|---|
| 2009 | || pChild->uCacheGen == (pChild->bObjType != KFSOBJ_TYPE_MISSING ? pCache->uGeneration : pCache->uGenerationMissing)
|
|---|
| 2010 | || kFsCacheRefreshObj(pCache, pChild, penmError))
|
|---|
| 2011 | return kFsCacheObjRetainInternal(pChild);
|
|---|
| 2012 | return NULL;
|
|---|
| 2013 | }
|
|---|
| 2014 |
|
|---|
| 2015 | /* Check that we've got a valid result and not a cached negative one. */
|
|---|
| 2016 | if (pChild->bObjType == KFSOBJ_TYPE_DIR)
|
|---|
| 2017 | { /* likely */ }
|
|---|
| 2018 | else
|
|---|
| 2019 | {
|
|---|
| 2020 | kHlpAssert(pChild->bObjType == KFSOBJ_TYPE_MISSING);
|
|---|
| 2021 | kHlpAssert(pChild->uCacheGen == KFSWOBJ_CACHE_GEN_IGNORE || pChild->uCacheGen == pCache->uGenerationMissing);
|
|---|
| 2022 | return pChild;
|
|---|
| 2023 | }
|
|---|
| 2024 |
|
|---|
| 2025 | /* Next component. */
|
|---|
| 2026 | pParent = (PKFSDIR)pChild;
|
|---|
| 2027 | off = offEnd + cchSlashes;
|
|---|
| 2028 |
|
|---|
| 2029 |
|
|---|
| 2030 | /*
|
|---|
| 2031 | * Walk loop.
|
|---|
| 2032 | */
|
|---|
| 2033 | for (;;)
|
|---|
| 2034 | {
|
|---|
| 2035 | /*
|
|---|
| 2036 | * Find the end of the component, counting trailing slashes.
|
|---|
| 2037 | */
|
|---|
| 2038 | char ch;
|
|---|
| 2039 | cchSlashes = 0;
|
|---|
| 2040 | offEnd = off + 1;
|
|---|
| 2041 | while ((ch = pszPath[offEnd]) != '\0')
|
|---|
| 2042 | {
|
|---|
| 2043 | if (!IS_SLASH(ch))
|
|---|
| 2044 | offEnd++;
|
|---|
| 2045 | else
|
|---|
| 2046 | {
|
|---|
| 2047 | do
|
|---|
| 2048 | cchSlashes++;
|
|---|
| 2049 | while (IS_SLASH(pszPath[offEnd + cchSlashes]));
|
|---|
| 2050 | break;
|
|---|
| 2051 | }
|
|---|
| 2052 | }
|
|---|
| 2053 |
|
|---|
| 2054 | /*
|
|---|
| 2055 | * Do we need to populate or refresh this directory first?
|
|---|
| 2056 | */
|
|---|
| 2057 | if ( pParent->fPopulated
|
|---|
| 2058 | && ( pParent->Obj.uCacheGen == KFSWOBJ_CACHE_GEN_IGNORE
|
|---|
| 2059 | || pParent->Obj.uCacheGen == pCache->uGeneration) )
|
|---|
| 2060 | { /* likely */ }
|
|---|
| 2061 | else if (kFsCachePopuplateOrRefreshDir(pCache, pParent, penmError))
|
|---|
| 2062 | { /* likely */ }
|
|---|
| 2063 | else
|
|---|
| 2064 | return NULL;
|
|---|
| 2065 |
|
|---|
| 2066 | /*
|
|---|
| 2067 | * Search the current node for the name.
|
|---|
| 2068 | *
|
|---|
| 2069 | * If we don't find it, we may insert a missing node depending on
|
|---|
| 2070 | * the cache configuration.
|
|---|
| 2071 | */
|
|---|
| 2072 | pChild = kFsCacheFindChildA(pCache, pParent, &pszPath[off], offEnd - off);
|
|---|
| 2073 | if (pChild != NULL)
|
|---|
| 2074 | { /* probably likely */ }
|
|---|
| 2075 | else
|
|---|
| 2076 | {
|
|---|
| 2077 | if (pCache->fFlags & KFSCACHE_F_MISSING_OBJECTS)
|
|---|
| 2078 | pChild = kFsCacheCreateMissingA(pCache, pParent, &pszPath[off], offEnd - off, penmError);
|
|---|
| 2079 | if (cchSlashes == 0 || offEnd + cchSlashes >= cchPath)
|
|---|
| 2080 | {
|
|---|
| 2081 | if (pChild)
|
|---|
| 2082 | return pChild;
|
|---|
| 2083 | *penmError = KFSLOOKUPERROR_NOT_FOUND;
|
|---|
| 2084 | }
|
|---|
| 2085 | else
|
|---|
| 2086 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_FOUND;
|
|---|
| 2087 | return NULL;
|
|---|
| 2088 | }
|
|---|
| 2089 |
|
|---|
| 2090 | /* Advance off and check if we're done already. */
|
|---|
| 2091 | off = offEnd + cchSlashes;
|
|---|
| 2092 | if ( cchSlashes == 0
|
|---|
| 2093 | || off >= cchPath)
|
|---|
| 2094 | {
|
|---|
| 2095 | if ( pChild->bObjType != KFSOBJ_TYPE_MISSING
|
|---|
| 2096 | || pChild->uCacheGen == KFSWOBJ_CACHE_GEN_IGNORE
|
|---|
| 2097 | || pChild->uCacheGen == pCache->uGenerationMissing
|
|---|
| 2098 | || kFsCacheRefreshMissing(pCache, pChild, penmError) )
|
|---|
| 2099 | { /* likely */ }
|
|---|
| 2100 | else
|
|---|
| 2101 | return NULL;
|
|---|
| 2102 | return pChild;
|
|---|
| 2103 | }
|
|---|
| 2104 |
|
|---|
| 2105 | /*
|
|---|
| 2106 | * Check that it's a directory. If a missing entry, we may have to
|
|---|
| 2107 | * refresh it and re-examin it.
|
|---|
| 2108 | */
|
|---|
| 2109 | if (pChild->bObjType == KFSOBJ_TYPE_DIR)
|
|---|
| 2110 | pParent = (PKFSDIR)pChild;
|
|---|
| 2111 | else if (pChild->bObjType != KFSOBJ_TYPE_MISSING)
|
|---|
| 2112 | {
|
|---|
| 2113 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_DIR;
|
|---|
| 2114 | return NULL;
|
|---|
| 2115 | }
|
|---|
| 2116 | else if ( pChild->uCacheGen == KFSWOBJ_CACHE_GEN_IGNORE
|
|---|
| 2117 | || pChild->uCacheGen == pCache->uGenerationMissing)
|
|---|
| 2118 | {
|
|---|
| 2119 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_FOUND;
|
|---|
| 2120 | return NULL;
|
|---|
| 2121 | }
|
|---|
| 2122 | else if (kFsCacheRefreshMissingIntermediateDir(pCache, pChild, penmError))
|
|---|
| 2123 | pParent = (PKFSDIR)pChild;
|
|---|
| 2124 | else
|
|---|
| 2125 | return NULL;
|
|---|
| 2126 | }
|
|---|
| 2127 |
|
|---|
| 2128 | return NULL;
|
|---|
| 2129 | }
|
|---|
| 2130 |
|
|---|
| 2131 |
|
|---|
| 2132 | /**
|
|---|
| 2133 | * Walk the file system tree for the given absolute path, UTF-16 version.
|
|---|
| 2134 | *
|
|---|
| 2135 | * This will create any missing nodes while walking.
|
|---|
| 2136 | *
|
|---|
| 2137 | * The caller will have to do the path hash table insertion of the result.
|
|---|
| 2138 | *
|
|---|
| 2139 | * @returns Pointer to the tree node corresponding to @a pszPath.
|
|---|
| 2140 | * NULL on lookup failure, see @a penmError for details.
|
|---|
| 2141 | * @param pCache The cache.
|
|---|
| 2142 | * @param pwszPath The path to walk.
|
|---|
| 2143 | * @param cwcPath The length of the path (in wchar_t's).
|
|---|
| 2144 | * @param penmError Where to return details as to why the lookup
|
|---|
| 2145 | * failed.
|
|---|
| 2146 | */
|
|---|
| 2147 | static PKFSOBJ kFsCacheLookupAbsoluteW(PKFSCACHE pCache, const wchar_t *pwszPath, KU32 cwcPath, KFSLOOKUPERROR *penmError)
|
|---|
| 2148 | {
|
|---|
| 2149 | PKFSDIR pParent = &pCache->RootDir;
|
|---|
| 2150 | PKFSOBJ pChild;
|
|---|
| 2151 | KU32 off;
|
|---|
| 2152 | KU32 cwcSlashes;
|
|---|
| 2153 | KU32 offEnd;
|
|---|
| 2154 |
|
|---|
| 2155 | KFSCACHE_LOG(("kFsCacheLookupAbsoluteW(%ls)\n", pwszPath));
|
|---|
| 2156 |
|
|---|
| 2157 | /*
|
|---|
| 2158 | * The root "directory" needs special handling, so we keep it outside the
|
|---|
| 2159 | * main search loop. (Special: Cannot enumerate it, UNCs, ++.)
|
|---|
| 2160 | */
|
|---|
| 2161 | cwcSlashes = 0;
|
|---|
| 2162 | off = 0;
|
|---|
| 2163 | if ( pwszPath[1] == ':'
|
|---|
| 2164 | && IS_ALPHA(pwszPath[0]))
|
|---|
| 2165 | {
|
|---|
| 2166 | /* Drive letter. */
|
|---|
| 2167 | offEnd = 2;
|
|---|
| 2168 | kHlpAssert(IS_SLASH(pwszPath[2]));
|
|---|
| 2169 | pChild = kFswCacheLookupDrive(pCache, toupper(pwszPath[0]), penmError);
|
|---|
| 2170 | }
|
|---|
| 2171 | else if ( IS_SLASH(pwszPath[0])
|
|---|
| 2172 | && IS_SLASH(pwszPath[1]) )
|
|---|
| 2173 | pChild = kFswCacheLookupUncShareW(pCache, pwszPath, &offEnd, penmError);
|
|---|
| 2174 | else
|
|---|
| 2175 | {
|
|---|
| 2176 | *penmError = KFSLOOKUPERROR_UNSUPPORTED;
|
|---|
| 2177 | return NULL;
|
|---|
| 2178 | }
|
|---|
| 2179 | if (pChild)
|
|---|
| 2180 | { /* likely */ }
|
|---|
| 2181 | else
|
|---|
| 2182 | return NULL;
|
|---|
| 2183 |
|
|---|
| 2184 | /* Count slashes trailing the root spec. */
|
|---|
| 2185 | if (offEnd < cwcPath)
|
|---|
| 2186 | {
|
|---|
| 2187 | kHlpAssert(IS_SLASH(pwszPath[offEnd]));
|
|---|
| 2188 | do
|
|---|
| 2189 | cwcSlashes++;
|
|---|
| 2190 | while (IS_SLASH(pwszPath[offEnd + cwcSlashes]));
|
|---|
| 2191 | }
|
|---|
| 2192 |
|
|---|
| 2193 | /* Done already? */
|
|---|
| 2194 | if (offEnd >= cwcPath)
|
|---|
| 2195 | {
|
|---|
| 2196 | if ( pChild->uCacheGen == KFSWOBJ_CACHE_GEN_IGNORE
|
|---|
| 2197 | || pChild->uCacheGen == (pChild->bObjType != KFSOBJ_TYPE_MISSING ? pCache->uGeneration : pCache->uGenerationMissing)
|
|---|
| 2198 | || kFsCacheRefreshObj(pCache, pChild, penmError))
|
|---|
| 2199 | return kFsCacheObjRetainInternal(pChild);
|
|---|
| 2200 | return NULL;
|
|---|
| 2201 | }
|
|---|
| 2202 |
|
|---|
| 2203 | /* Check that we've got a valid result and not a cached negative one. */
|
|---|
| 2204 | if (pChild->bObjType == KFSOBJ_TYPE_DIR)
|
|---|
| 2205 | { /* likely */ }
|
|---|
| 2206 | else
|
|---|
| 2207 | {
|
|---|
| 2208 | kHlpAssert(pChild->bObjType == KFSOBJ_TYPE_MISSING);
|
|---|
| 2209 | kHlpAssert(pChild->uCacheGen == KFSWOBJ_CACHE_GEN_IGNORE || pChild->uCacheGen == pCache->uGenerationMissing);
|
|---|
| 2210 | return pChild;
|
|---|
| 2211 | }
|
|---|
| 2212 |
|
|---|
| 2213 | /* Next component. */
|
|---|
| 2214 | pParent = (PKFSDIR)pChild;
|
|---|
| 2215 | off = offEnd + cwcSlashes;
|
|---|
| 2216 |
|
|---|
| 2217 |
|
|---|
| 2218 | /*
|
|---|
| 2219 | * Walk loop.
|
|---|
| 2220 | */
|
|---|
| 2221 | for (;;)
|
|---|
| 2222 | {
|
|---|
| 2223 | /*
|
|---|
| 2224 | * Find the end of the component, counting trailing slashes.
|
|---|
| 2225 | */
|
|---|
| 2226 | wchar_t wc;
|
|---|
| 2227 | cwcSlashes = 0;
|
|---|
| 2228 | offEnd = off + 1;
|
|---|
| 2229 | while ((wc = pwszPath[offEnd]) != '\0')
|
|---|
| 2230 | {
|
|---|
| 2231 | if (!IS_SLASH(wc))
|
|---|
| 2232 | offEnd++;
|
|---|
| 2233 | else
|
|---|
| 2234 | {
|
|---|
| 2235 | do
|
|---|
| 2236 | cwcSlashes++;
|
|---|
| 2237 | while (IS_SLASH(pwszPath[offEnd + cwcSlashes]));
|
|---|
| 2238 | break;
|
|---|
| 2239 | }
|
|---|
| 2240 | }
|
|---|
| 2241 |
|
|---|
| 2242 | /*
|
|---|
| 2243 | * Do we need to populate or refresh this directory first?
|
|---|
| 2244 | */
|
|---|
| 2245 | if ( pParent->fPopulated
|
|---|
| 2246 | && ( pParent->Obj.uCacheGen == KFSWOBJ_CACHE_GEN_IGNORE
|
|---|
| 2247 | || pParent->Obj.uCacheGen == pCache->uGeneration) )
|
|---|
| 2248 | { /* likely */ }
|
|---|
| 2249 | else if (kFsCachePopuplateOrRefreshDir(pCache, pParent, penmError))
|
|---|
| 2250 | { /* likely */ }
|
|---|
| 2251 | else
|
|---|
| 2252 | return NULL;
|
|---|
| 2253 |
|
|---|
| 2254 | /*
|
|---|
| 2255 | * Search the current node for the name.
|
|---|
| 2256 | *
|
|---|
| 2257 | * If we don't find it, we may insert a missing node depending on
|
|---|
| 2258 | * the cache configuration.
|
|---|
| 2259 | */
|
|---|
| 2260 | pChild = kFsCacheFindChildW(pCache, pParent, &pwszPath[off], offEnd - off);
|
|---|
| 2261 | if (pChild != NULL)
|
|---|
| 2262 | { /* probably likely */ }
|
|---|
| 2263 | else
|
|---|
| 2264 | {
|
|---|
| 2265 | if (pCache->fFlags & KFSCACHE_F_MISSING_OBJECTS)
|
|---|
| 2266 | pChild = kFsCacheCreateMissingW(pCache, pParent, &pwszPath[off], offEnd - off, penmError);
|
|---|
| 2267 | if (cwcSlashes == 0 || offEnd + cwcSlashes >= cwcPath)
|
|---|
| 2268 | {
|
|---|
| 2269 | if (pChild)
|
|---|
| 2270 | return pChild;
|
|---|
| 2271 | *penmError = KFSLOOKUPERROR_NOT_FOUND;
|
|---|
| 2272 | }
|
|---|
| 2273 | else
|
|---|
| 2274 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_FOUND;
|
|---|
| 2275 | return NULL;
|
|---|
| 2276 | }
|
|---|
| 2277 |
|
|---|
| 2278 | /* Advance off and check if we're done already. */
|
|---|
| 2279 | off = offEnd + cwcSlashes;
|
|---|
| 2280 | if ( cwcSlashes == 0
|
|---|
| 2281 | || off >= cwcPath)
|
|---|
| 2282 | {
|
|---|
| 2283 | if ( pChild->bObjType != KFSOBJ_TYPE_MISSING
|
|---|
| 2284 | || pChild->uCacheGen == KFSWOBJ_CACHE_GEN_IGNORE
|
|---|
| 2285 | || pChild->uCacheGen == pCache->uGenerationMissing
|
|---|
| 2286 | || kFsCacheRefreshMissing(pCache, pChild, penmError) )
|
|---|
| 2287 | { /* likely */ }
|
|---|
| 2288 | else
|
|---|
| 2289 | return NULL;
|
|---|
| 2290 | return pChild;
|
|---|
| 2291 | }
|
|---|
| 2292 |
|
|---|
| 2293 | /*
|
|---|
| 2294 | * Check that it's a directory. If a missing entry, we may have to
|
|---|
| 2295 | * refresh it and re-examin it.
|
|---|
| 2296 | */
|
|---|
| 2297 | if (pChild->bObjType == KFSOBJ_TYPE_DIR)
|
|---|
| 2298 | pParent = (PKFSDIR)pChild;
|
|---|
| 2299 | else if (pChild->bObjType != KFSOBJ_TYPE_MISSING)
|
|---|
| 2300 | {
|
|---|
| 2301 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_DIR;
|
|---|
| 2302 | return NULL;
|
|---|
| 2303 | }
|
|---|
| 2304 | else if ( pChild->uCacheGen == KFSWOBJ_CACHE_GEN_IGNORE
|
|---|
| 2305 | || pChild->uCacheGen == pCache->uGenerationMissing)
|
|---|
| 2306 | {
|
|---|
| 2307 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_FOUND;
|
|---|
| 2308 | return NULL;
|
|---|
| 2309 | }
|
|---|
| 2310 | else if (kFsCacheRefreshMissingIntermediateDir(pCache, pChild, penmError))
|
|---|
| 2311 | pParent = (PKFSDIR)pChild;
|
|---|
| 2312 | else
|
|---|
| 2313 | return NULL;
|
|---|
| 2314 | }
|
|---|
| 2315 |
|
|---|
| 2316 | return NULL;
|
|---|
| 2317 | }
|
|---|
| 2318 |
|
|---|
| 2319 |
|
|---|
| 2320 | /**
|
|---|
| 2321 | * This deals with paths that are relative and paths that contains '..'
|
|---|
| 2322 | * elements, ANSI version.
|
|---|
| 2323 | *
|
|---|
| 2324 | * @returns Pointer to object corresponding to @a pszPath on success.
|
|---|
| 2325 | * NULL if this isn't a path we care to cache.
|
|---|
| 2326 | *
|
|---|
| 2327 | * @param pCache The cache.
|
|---|
| 2328 | * @param pszPath The path.
|
|---|
| 2329 | * @param cchPath The length of the path.
|
|---|
| 2330 | * @param penmError Where to return details as to why the lookup
|
|---|
| 2331 | * failed.
|
|---|
| 2332 | */
|
|---|
| 2333 | static PKFSOBJ kFsCacheLookupSlowA(PKFSCACHE pCache, const char *pszPath, KU32 cchPath, KFSLOOKUPERROR *penmError)
|
|---|
| 2334 | {
|
|---|
| 2335 | /*
|
|---|
| 2336 | * We just call GetFullPathNameA here to do the job as getcwd and _getdcwd
|
|---|
| 2337 | * ends up calling it anyway.
|
|---|
| 2338 | */
|
|---|
| 2339 | char szFull[KFSCACHE_CFG_MAX_PATH];
|
|---|
| 2340 | UINT cchFull = GetFullPathNameA(pszPath, sizeof(szFull), szFull, NULL);
|
|---|
| 2341 | if ( cchFull >= 3
|
|---|
| 2342 | && cchFull < sizeof(szFull))
|
|---|
| 2343 | {
|
|---|
| 2344 | PKFSOBJ pFsObj;
|
|---|
| 2345 | KFSCACHE_LOG(("kFsCacheLookupSlowA(%s)\n", pszPath));
|
|---|
| 2346 | pFsObj = kFsCacheLookupAbsoluteA(pCache, szFull, cchFull, penmError);
|
|---|
| 2347 |
|
|---|
| 2348 | #if 0 /* No need to do this until it's actually queried. */
|
|---|
| 2349 | /* Cache the resulting path. */
|
|---|
| 2350 | if ( pFsObj
|
|---|
| 2351 | || (pCache->fFlags & KFSCACHE_F_MISSING_PATHS)
|
|---|
| 2352 | || *penmError == KFSLOOKUPERROR_UNSUPPORTED)
|
|---|
| 2353 | {
|
|---|
| 2354 | KU32 uHashPath = kFsCacheStrHash(szFull);
|
|---|
| 2355 | kFsCacheCreatePathHashTabEntryA(pCache, pFsObj, pszPath, cchPath, uHashPath,
|
|---|
| 2356 | uHashPath % K_ELEMENTS(pCache->apAnsiPaths), *penmError);
|
|---|
| 2357 | }
|
|---|
| 2358 | #endif
|
|---|
| 2359 | return pFsObj;
|
|---|
| 2360 | }
|
|---|
| 2361 |
|
|---|
| 2362 | /* The path is too long! */
|
|---|
| 2363 | kHlpAssertMsgFailed(("'%s' -> cchFull=%u\n", pszPath, cchFull));
|
|---|
| 2364 | *penmError = KFSLOOKUPERROR_PATH_TOO_LONG;
|
|---|
| 2365 | return NULL;
|
|---|
| 2366 | }
|
|---|
| 2367 |
|
|---|
| 2368 |
|
|---|
| 2369 | /**
|
|---|
| 2370 | * This deals with paths that are relative and paths that contains '..'
|
|---|
| 2371 | * elements, UTF-16 version.
|
|---|
| 2372 | *
|
|---|
| 2373 | * @returns Pointer to object corresponding to @a pszPath on success.
|
|---|
| 2374 | * NULL if this isn't a path we care to cache.
|
|---|
| 2375 | *
|
|---|
| 2376 | * @param pCache The cache.
|
|---|
| 2377 | * @param pwszPath The path.
|
|---|
| 2378 | * @param cwcPath The length of the path (in wchar_t's).
|
|---|
| 2379 | * @param penmError Where to return details as to why the lookup
|
|---|
| 2380 | * failed.
|
|---|
| 2381 | */
|
|---|
| 2382 | static PKFSOBJ kFsCacheLookupSlowW(PKFSCACHE pCache, const wchar_t *pwszPath, KU32 wcwPath, KFSLOOKUPERROR *penmError)
|
|---|
| 2383 | {
|
|---|
| 2384 | /*
|
|---|
| 2385 | * We just call GetFullPathNameA here to do the job as getcwd and _getdcwd
|
|---|
| 2386 | * ends up calling it anyway.
|
|---|
| 2387 | */
|
|---|
| 2388 | wchar_t wszFull[KFSCACHE_CFG_MAX_PATH];
|
|---|
| 2389 | UINT cwcFull = GetFullPathNameW(pwszPath, KFSCACHE_CFG_MAX_PATH, wszFull, NULL);
|
|---|
| 2390 | if ( cwcFull >= 3
|
|---|
| 2391 | && cwcFull < KFSCACHE_CFG_MAX_PATH)
|
|---|
| 2392 | {
|
|---|
| 2393 | PKFSOBJ pFsObj;
|
|---|
| 2394 | KFSCACHE_LOG(("kFsCacheLookupSlowA(%ls)\n", pwszPath));
|
|---|
| 2395 | pFsObj = kFsCacheLookupAbsoluteW(pCache, wszFull, cwcFull, penmError);
|
|---|
| 2396 |
|
|---|
| 2397 | #if 0 /* No need to do this until it's actually queried. */
|
|---|
| 2398 | /* Cache the resulting path. */
|
|---|
| 2399 | if ( pFsObj
|
|---|
| 2400 | || (pCache->fFlags & KFSCACHE_F_MISSING_PATHS)
|
|---|
| 2401 | || *penmError == KFSLOOKUPERROR_UNSUPPORTED)
|
|---|
| 2402 | {
|
|---|
| 2403 | KU32 uHashPath = kFsCacheStrHash(szFull);
|
|---|
| 2404 | kFsCacheCreatePathHashTabEntryA(pCache, pFsObj, pszPath, cchPath, uHashPath,
|
|---|
| 2405 | uHashPath % K_ELEMENTS(pCache->apAnsiPaths), *penmError);
|
|---|
| 2406 | }
|
|---|
| 2407 | #endif
|
|---|
| 2408 | return pFsObj;
|
|---|
| 2409 | }
|
|---|
| 2410 |
|
|---|
| 2411 | /* The path is too long! */
|
|---|
| 2412 | kHlpAssertMsgFailed(("'%ls' -> cwcFull=%u\n", pwszPath, cwcFull));
|
|---|
| 2413 | *penmError = KFSLOOKUPERROR_PATH_TOO_LONG;
|
|---|
| 2414 | return NULL;
|
|---|
| 2415 | }
|
|---|
| 2416 |
|
|---|
| 2417 |
|
|---|
| 2418 | /**
|
|---|
| 2419 | * Refreshes a path hash that has expired, ANSI version.
|
|---|
| 2420 | *
|
|---|
| 2421 | * @returns pHash on success, NULL if removed.
|
|---|
| 2422 | * @param pCache The cache.
|
|---|
| 2423 | * @param pHashEntry The path hash.
|
|---|
| 2424 | * @param idxHashTab The hash table entry.
|
|---|
| 2425 | */
|
|---|
| 2426 | static PKFSHASHA kFsCacheRefreshPathA(PKFSCACHE pCache, PKFSHASHA pHashEntry, KU32 idxHashTab)
|
|---|
| 2427 | {
|
|---|
| 2428 | /** @todo implement once we've start inserting uCacheGen nodes. */
|
|---|
| 2429 | __debugbreak();
|
|---|
| 2430 | K_NOREF(pCache);
|
|---|
| 2431 | K_NOREF(idxHashTab);
|
|---|
| 2432 | return pHashEntry;
|
|---|
| 2433 | }
|
|---|
| 2434 |
|
|---|
| 2435 |
|
|---|
| 2436 | /**
|
|---|
| 2437 | * Refreshes a path hash that has expired, UTF-16 version.
|
|---|
| 2438 | *
|
|---|
| 2439 | * @returns pHash on success, NULL if removed.
|
|---|
| 2440 | * @param pCache The cache.
|
|---|
| 2441 | * @param pHashEntry The path hash.
|
|---|
| 2442 | * @param idxHashTab The hash table entry.
|
|---|
| 2443 | */
|
|---|
| 2444 | static PKFSHASHW kFsCacheRefreshPathW(PKFSCACHE pCache, PKFSHASHW pHashEntry, KU32 idxHashTab)
|
|---|
| 2445 | {
|
|---|
| 2446 | /** @todo implement once we've start inserting uCacheGen nodes. */
|
|---|
| 2447 | __debugbreak();
|
|---|
| 2448 | K_NOREF(pCache);
|
|---|
| 2449 | K_NOREF(idxHashTab);
|
|---|
| 2450 | return pHashEntry;
|
|---|
| 2451 | }
|
|---|
| 2452 |
|
|---|
| 2453 |
|
|---|
| 2454 | /**
|
|---|
| 2455 | * Looks up a KFSOBJ for the given ANSI path.
|
|---|
| 2456 | *
|
|---|
| 2457 | * This will first try the hash table. If not in the hash table, the file
|
|---|
| 2458 | * system cache tree is walked, missing bits filled in and finally a hash table
|
|---|
| 2459 | * entry is created.
|
|---|
| 2460 | *
|
|---|
| 2461 | * Only drive letter paths are cachable. We don't do any UNC paths at this
|
|---|
| 2462 | * point.
|
|---|
| 2463 | *
|
|---|
| 2464 | * @returns Reference to object corresponding to @a pszPath on success, this
|
|---|
| 2465 | * must be released by kwFsCacheRelease.
|
|---|
| 2466 | * NULL if not a path we care to cache.
|
|---|
| 2467 | * @param pCache The cache.
|
|---|
| 2468 | * @param pszPath The path to lookup.
|
|---|
| 2469 | * @param penmError Where to return details as to why the lookup
|
|---|
| 2470 | * failed.
|
|---|
| 2471 | */
|
|---|
| 2472 | PKFSOBJ kFsCacheLookupA(PKFSCACHE pCache, const char *pszPath, KFSLOOKUPERROR *penmError)
|
|---|
| 2473 | {
|
|---|
| 2474 | /*
|
|---|
| 2475 | * Do hash table lookup of the path.
|
|---|
| 2476 | */
|
|---|
| 2477 | KU32 uHashPath;
|
|---|
| 2478 | KU32 cchPath = (KU32)kFsCacheStrHashEx(pszPath, &uHashPath);
|
|---|
| 2479 | KU32 idxHashTab = uHashPath % K_ELEMENTS(pCache->apAnsiPaths);
|
|---|
| 2480 | PKFSHASHA pHashEntry = pCache->apAnsiPaths[idxHashTab];
|
|---|
| 2481 | if (pHashEntry)
|
|---|
| 2482 | {
|
|---|
| 2483 | do
|
|---|
| 2484 | {
|
|---|
| 2485 | if ( pHashEntry->uHashPath == uHashPath
|
|---|
| 2486 | && pHashEntry->cchPath == cchPath
|
|---|
| 2487 | && kHlpMemComp(pHashEntry->pszPath, pszPath, cchPath) == 0)
|
|---|
| 2488 | {
|
|---|
| 2489 | if ( pHashEntry->uCacheGen == KFSWOBJ_CACHE_GEN_IGNORE
|
|---|
| 2490 | || pHashEntry->uCacheGen == pCache->uGeneration
|
|---|
| 2491 | || (pHashEntry = kFsCacheRefreshPathA(pCache, pHashEntry, idxHashTab)) )
|
|---|
| 2492 | {
|
|---|
| 2493 | pCache->cLookups++;
|
|---|
| 2494 | pCache->cPathHashHits++;
|
|---|
| 2495 | KFSCACHE_LOG(("kFsCacheLookupA(%s) - hit %p\n", pszPath, pHashEntry->pFsObj));
|
|---|
| 2496 | *penmError = pHashEntry->enmError;
|
|---|
| 2497 | if (pHashEntry->pFsObj)
|
|---|
| 2498 | return kFsCacheObjRetainInternal(pHashEntry->pFsObj);
|
|---|
| 2499 | return NULL;
|
|---|
| 2500 | }
|
|---|
| 2501 | break;
|
|---|
| 2502 | }
|
|---|
| 2503 | pHashEntry = pHashEntry->pNext;
|
|---|
| 2504 | } while (pHashEntry);
|
|---|
| 2505 | }
|
|---|
| 2506 |
|
|---|
| 2507 | /*
|
|---|
| 2508 | * Create an entry for it by walking the file system cache and filling in the blanks.
|
|---|
| 2509 | */
|
|---|
| 2510 | if ( cchPath > 0
|
|---|
| 2511 | && cchPath < KFSCACHE_CFG_MAX_PATH)
|
|---|
| 2512 | {
|
|---|
| 2513 | PKFSOBJ pFsObj;
|
|---|
| 2514 |
|
|---|
| 2515 | /* Is absolute without any '..' bits? */
|
|---|
| 2516 | if ( cchPath >= 3
|
|---|
| 2517 | && ( ( pszPath[1] == ':' /* Drive letter */
|
|---|
| 2518 | && IS_SLASH(pszPath[2])
|
|---|
| 2519 | && IS_ALPHA(pszPath[0]) )
|
|---|
| 2520 | || ( IS_SLASH(pszPath[0]) /* UNC */
|
|---|
| 2521 | && IS_SLASH(pszPath[1]) ) )
|
|---|
| 2522 | && !kFsCacheHasDotDotA(pszPath, cchPath) )
|
|---|
| 2523 | pFsObj = kFsCacheLookupAbsoluteA(pCache, pszPath, cchPath, penmError);
|
|---|
| 2524 | else
|
|---|
| 2525 | pFsObj = kFsCacheLookupSlowA(pCache, pszPath, cchPath, penmError);
|
|---|
| 2526 | if ( pFsObj
|
|---|
| 2527 | || ( (pCache->fFlags & KFSCACHE_F_MISSING_PATHS)
|
|---|
| 2528 | && *penmError != KFSLOOKUPERROR_PATH_TOO_LONG)
|
|---|
| 2529 | || *penmError == KFSLOOKUPERROR_UNSUPPORTED )
|
|---|
| 2530 | kFsCacheCreatePathHashTabEntryA(pCache, pFsObj, pszPath, cchPath, uHashPath, idxHashTab, *penmError);
|
|---|
| 2531 |
|
|---|
| 2532 | pCache->cLookups++;
|
|---|
| 2533 | if (pFsObj)
|
|---|
| 2534 | pCache->cWalkHits++;
|
|---|
| 2535 | return pFsObj;
|
|---|
| 2536 | }
|
|---|
| 2537 |
|
|---|
| 2538 | *penmError = KFSLOOKUPERROR_PATH_TOO_LONG;
|
|---|
| 2539 | return NULL;
|
|---|
| 2540 | }
|
|---|
| 2541 |
|
|---|
| 2542 |
|
|---|
| 2543 | /**
|
|---|
| 2544 | * Looks up a KFSOBJ for the given UTF-16 path.
|
|---|
| 2545 | *
|
|---|
| 2546 | * This will first try the hash table. If not in the hash table, the file
|
|---|
| 2547 | * system cache tree is walked, missing bits filled in and finally a hash table
|
|---|
| 2548 | * entry is created.
|
|---|
| 2549 | *
|
|---|
| 2550 | * Only drive letter paths are cachable. We don't do any UNC paths at this
|
|---|
| 2551 | * point.
|
|---|
| 2552 | *
|
|---|
| 2553 | * @returns Reference to object corresponding to @a pszPath on success, this
|
|---|
| 2554 | * must be released by kwFsCacheRelease.
|
|---|
| 2555 | * NULL if not a path we care to cache.
|
|---|
| 2556 | * @param pCache The cache.
|
|---|
| 2557 | * @param pwszPath The path to lookup.
|
|---|
| 2558 | * @param penmError Where to return details as to why the lookup
|
|---|
| 2559 | * failed.
|
|---|
| 2560 | */
|
|---|
| 2561 | PKFSOBJ kFsCacheLookupW(PKFSCACHE pCache, const wchar_t *pwszPath, KFSLOOKUPERROR *penmError)
|
|---|
| 2562 | {
|
|---|
| 2563 | /*
|
|---|
| 2564 | * Do hash table lookup of the path.
|
|---|
| 2565 | */
|
|---|
| 2566 | KU32 uHashPath;
|
|---|
| 2567 | KU32 cwcPath = (KU32)kFsCacheUtf16HashEx(pwszPath, &uHashPath);
|
|---|
| 2568 | KU32 idxHashTab = uHashPath % K_ELEMENTS(pCache->apAnsiPaths);
|
|---|
| 2569 | PKFSHASHW pHashEntry = pCache->apUtf16Paths[idxHashTab];
|
|---|
| 2570 | if (pHashEntry)
|
|---|
| 2571 | {
|
|---|
| 2572 | do
|
|---|
| 2573 | {
|
|---|
| 2574 | if ( pHashEntry->uHashPath == uHashPath
|
|---|
| 2575 | && pHashEntry->cwcPath == cwcPath
|
|---|
| 2576 | && kHlpMemComp(pHashEntry->pwszPath, pwszPath, cwcPath) == 0)
|
|---|
| 2577 | {
|
|---|
| 2578 | if ( pHashEntry->uCacheGen == KFSWOBJ_CACHE_GEN_IGNORE
|
|---|
| 2579 | || pHashEntry->uCacheGen == pCache->uGeneration
|
|---|
| 2580 | || (pHashEntry = kFsCacheRefreshPathW(pCache, pHashEntry, idxHashTab)) )
|
|---|
| 2581 | {
|
|---|
| 2582 | pCache->cLookups++;
|
|---|
| 2583 | pCache->cPathHashHits++;
|
|---|
| 2584 | KFSCACHE_LOG(("kFsCacheLookupW(%ls) - hit %p\n", pwszPath, pHashEntry->pFsObj));
|
|---|
| 2585 | *penmError = pHashEntry->enmError;
|
|---|
| 2586 | if (pHashEntry->pFsObj)
|
|---|
| 2587 | return kFsCacheObjRetainInternal(pHashEntry->pFsObj);
|
|---|
| 2588 | return NULL;
|
|---|
| 2589 | }
|
|---|
| 2590 | break;
|
|---|
| 2591 | }
|
|---|
| 2592 | pHashEntry = pHashEntry->pNext;
|
|---|
| 2593 | } while (pHashEntry);
|
|---|
| 2594 | }
|
|---|
| 2595 |
|
|---|
| 2596 | /*
|
|---|
| 2597 | * Create an entry for it by walking the file system cache and filling in the blanks.
|
|---|
| 2598 | */
|
|---|
| 2599 | if ( cwcPath > 0
|
|---|
| 2600 | && cwcPath < KFSCACHE_CFG_MAX_PATH)
|
|---|
| 2601 | {
|
|---|
| 2602 | PKFSOBJ pFsObj;
|
|---|
| 2603 |
|
|---|
| 2604 | /* Is absolute without any '..' bits? */
|
|---|
| 2605 | if ( cwcPath >= 3
|
|---|
| 2606 | && ( ( pwszPath[1] == ':' /* Drive letter */
|
|---|
| 2607 | && IS_SLASH(pwszPath[2])
|
|---|
| 2608 | && IS_ALPHA(pwszPath[0]) )
|
|---|
| 2609 | || ( IS_SLASH(pwszPath[0]) /* UNC */
|
|---|
| 2610 | && IS_SLASH(pwszPath[1]) ) )
|
|---|
| 2611 | && !kFsCacheHasDotDotW(pwszPath, cwcPath) )
|
|---|
| 2612 | pFsObj = kFsCacheLookupAbsoluteW(pCache, pwszPath, cwcPath, penmError);
|
|---|
| 2613 | else
|
|---|
| 2614 | pFsObj = kFsCacheLookupSlowW(pCache, pwszPath, cwcPath, penmError);
|
|---|
| 2615 | if ( pFsObj
|
|---|
| 2616 | || ( (pCache->fFlags & KFSCACHE_F_MISSING_PATHS)
|
|---|
| 2617 | && *penmError != KFSLOOKUPERROR_PATH_TOO_LONG)
|
|---|
| 2618 | || *penmError == KFSLOOKUPERROR_UNSUPPORTED )
|
|---|
| 2619 | kFsCacheCreatePathHashTabEntryW(pCache, pFsObj, pwszPath, cwcPath, uHashPath, idxHashTab, *penmError);
|
|---|
| 2620 |
|
|---|
| 2621 | pCache->cLookups++;
|
|---|
| 2622 | if (pFsObj)
|
|---|
| 2623 | pCache->cWalkHits++;
|
|---|
| 2624 | return pFsObj;
|
|---|
| 2625 | }
|
|---|
| 2626 |
|
|---|
| 2627 | *penmError = KFSLOOKUPERROR_PATH_TOO_LONG;
|
|---|
| 2628 | return NULL;
|
|---|
| 2629 | }
|
|---|
| 2630 |
|
|---|
| 2631 |
|
|---|
| 2632 | /**
|
|---|
| 2633 | * Destroys a cache object which has a zero reference count.
|
|---|
| 2634 | *
|
|---|
| 2635 | * @returns 0
|
|---|
| 2636 | * @param pCache The cache.
|
|---|
| 2637 | * @param pObj The object.
|
|---|
| 2638 | */
|
|---|
| 2639 | KU32 kFsCacheObjDestroy(PKFSCACHE pCache, PKFSOBJ pObj)
|
|---|
| 2640 | {
|
|---|
| 2641 | kHlpAssert(pObj->cRefs == 0);
|
|---|
| 2642 | kHlpAssert(pObj->pParent == NULL);
|
|---|
| 2643 |
|
|---|
| 2644 | switch (pObj->bObjType)
|
|---|
| 2645 | {
|
|---|
| 2646 | case KFSOBJ_TYPE_MISSING:
|
|---|
| 2647 | //case KFSOBJ_TYPE_MISSING | KFSOBJ_TYPE_F_INVALID:
|
|---|
| 2648 | /* nothing else to do here */
|
|---|
| 2649 | pCache->cbObjects -= sizeof(*pObj);
|
|---|
| 2650 | break;
|
|---|
| 2651 |
|
|---|
| 2652 | case KFSOBJ_TYPE_DIR:
|
|---|
| 2653 | //case KFSOBJ_TYPE_DIR | KFSOBJ_TYPE_F_INVALID:
|
|---|
| 2654 | case KFSOBJ_TYPE_FILE:
|
|---|
| 2655 | //case KFSOBJ_TYPE_FILE | KFSOBJ_TYPE_F_INVALID:
|
|---|
| 2656 | kHlpAssertFailed();
|
|---|
| 2657 | break;
|
|---|
| 2658 | default:
|
|---|
| 2659 | kHlpAssertFailed();
|
|---|
| 2660 | }
|
|---|
| 2661 | pCache->cObjects--;
|
|---|
| 2662 | free(pObj);
|
|---|
| 2663 | return 0;
|
|---|
| 2664 | }
|
|---|
| 2665 |
|
|---|
| 2666 |
|
|---|
| 2667 | /**
|
|---|
| 2668 | * Releases a reference to a cache object.
|
|---|
| 2669 | *
|
|---|
| 2670 | * @returns New reference count.
|
|---|
| 2671 | * @param pCache The cache.
|
|---|
| 2672 | * @param pObj The object.
|
|---|
| 2673 | */
|
|---|
| 2674 | KU32 kFsCacheObjRelease(PKFSCACHE pCache, PKFSOBJ pObj)
|
|---|
| 2675 | {
|
|---|
| 2676 | KU32 cRefs = --pObj->cRefs;
|
|---|
| 2677 | if (cRefs)
|
|---|
| 2678 | return cRefs;
|
|---|
| 2679 | return kFsCacheObjDestroy(pCache, pObj);
|
|---|
| 2680 | }
|
|---|
| 2681 |
|
|---|
| 2682 |
|
|---|
| 2683 | /**
|
|---|
| 2684 | * Retains a reference to a cahce object.
|
|---|
| 2685 | *
|
|---|
| 2686 | * @returns New reference count.
|
|---|
| 2687 | * @param pObj The object.
|
|---|
| 2688 | */
|
|---|
| 2689 | KU32 kFsCacheObjRetain(PKFSOBJ pObj)
|
|---|
| 2690 | {
|
|---|
| 2691 | KU32 cRefs = ++pObj->cRefs;
|
|---|
| 2692 | kHlpAssert(cRefs < 16384);
|
|---|
| 2693 | return cRefs;
|
|---|
| 2694 | }
|
|---|
| 2695 |
|
|---|
| 2696 |
|
|---|
| 2697 |
|
|---|
| 2698 | PKFSCACHE kFsCacheCreate(KU32 fFlags)
|
|---|
| 2699 | {
|
|---|
| 2700 | PKFSCACHE pCache;
|
|---|
| 2701 | birdResolveImports();
|
|---|
| 2702 |
|
|---|
| 2703 | pCache = (PKFSCACHE)kHlpAllocZ(sizeof(*pCache));
|
|---|
| 2704 | if (pCache)
|
|---|
| 2705 | {
|
|---|
| 2706 | /* Dummy root dir entry. */
|
|---|
| 2707 | pCache->RootDir.Obj.u32Magic = KFSOBJ_MAGIC;
|
|---|
| 2708 | pCache->RootDir.Obj.cRefs = 1;
|
|---|
| 2709 | pCache->RootDir.Obj.uCacheGen = KFSWOBJ_CACHE_GEN_IGNORE;
|
|---|
| 2710 | pCache->RootDir.Obj.bObjType = KFSOBJ_TYPE_DIR;
|
|---|
| 2711 | pCache->RootDir.Obj.fHaveStats = K_FALSE;
|
|---|
| 2712 | pCache->RootDir.Obj.pParent = NULL;
|
|---|
| 2713 | pCache->RootDir.Obj.pszName = "";
|
|---|
| 2714 | pCache->RootDir.Obj.cchName = 0;
|
|---|
| 2715 | pCache->RootDir.Obj.cchParent = 0;
|
|---|
| 2716 | #ifdef KFSCACHE_CFG_UTF16
|
|---|
| 2717 | pCache->RootDir.Obj.cwcName = 0;
|
|---|
| 2718 | pCache->RootDir.Obj.cwcParent = 0;
|
|---|
| 2719 | pCache->RootDir.Obj.pwszName = L"";
|
|---|
| 2720 | #endif
|
|---|
| 2721 |
|
|---|
| 2722 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 2723 | pCache->RootDir.Obj.pszShortName = NULL;
|
|---|
| 2724 | pCache->RootDir.Obj.cchShortName = 0;
|
|---|
| 2725 | pCache->RootDir.Obj.cchShortParent = 0;
|
|---|
| 2726 | # ifdef KFSCACHE_CFG_UTF16
|
|---|
| 2727 | pCache->RootDir.Obj.cwcShortName;
|
|---|
| 2728 | pCache->RootDir.Obj.cwcShortParent;
|
|---|
| 2729 | pCache->RootDir.Obj.pwszShortName;
|
|---|
| 2730 | # endif
|
|---|
| 2731 | #endif
|
|---|
| 2732 | pCache->RootDir.cChildren = 0;
|
|---|
| 2733 | pCache->RootDir.papChildren = NULL;
|
|---|
| 2734 | pCache->RootDir.hDir = INVALID_HANDLE_VALUE;
|
|---|
| 2735 | pCache->RootDir.cHashTab = 251;
|
|---|
| 2736 | pCache->RootDir.paHashTab = (PKFSOBJHASH)kHlpAllocZ( pCache->RootDir.cHashTab
|
|---|
| 2737 | * sizeof(pCache->RootDir.paHashTab[0]));
|
|---|
| 2738 | if (pCache->RootDir.paHashTab)
|
|---|
| 2739 | {
|
|---|
| 2740 | /* The cache itself. */
|
|---|
| 2741 | pCache->u32Magic = KFSCACHE_MAGIC;
|
|---|
| 2742 | pCache->fFlags = fFlags;
|
|---|
| 2743 | pCache->uGeneration = 1;
|
|---|
| 2744 | pCache->cObjects = 1;
|
|---|
| 2745 | pCache->cbObjects = sizeof(pCache->RootDir) + pCache->RootDir.cHashTab * sizeof(pCache->RootDir.paHashTab[0]);
|
|---|
| 2746 | pCache->cPathHashHits = 0;
|
|---|
| 2747 | pCache->cWalkHits = 0;
|
|---|
| 2748 | pCache->cAnsiPaths = 0;
|
|---|
| 2749 | pCache->cAnsiPathCollisions = 0;
|
|---|
| 2750 | pCache->cbAnsiPaths = 0;
|
|---|
| 2751 | #ifdef KFSCACHE_CFG_UTF16
|
|---|
| 2752 | pCache->cUtf16Paths = 0;
|
|---|
| 2753 | pCache->cUtf16PathCollisions = 0;
|
|---|
| 2754 | pCache->cbUtf16Paths = 0;
|
|---|
| 2755 | #endif
|
|---|
| 2756 | return pCache;
|
|---|
| 2757 | }
|
|---|
| 2758 |
|
|---|
| 2759 | kHlpFree(pCache);
|
|---|
| 2760 | }
|
|---|
| 2761 | return NULL;
|
|---|
| 2762 | }
|
|---|
| 2763 |
|
|---|