| 1 | /* $Id: kFsCache.c 2855 2016-08-31 21:21:22Z bird $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * ntdircache.c - NT directory content cache.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (c) 2016 knut st. osmundsen <bird-kBuild-spamx@anduin.net>
|
|---|
| 8 | *
|
|---|
| 9 | * Permission is hereby granted, free of charge, to any person obtaining a
|
|---|
| 10 | * copy of this software and associated documentation files (the "Software"),
|
|---|
| 11 | * to deal in the Software without restriction, including without limitation
|
|---|
| 12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|---|
| 13 | * and/or sell copies of the Software, and to permit persons to whom the
|
|---|
| 14 | * Software is furnished to do so, subject to the following conditions:
|
|---|
| 15 | *
|
|---|
| 16 | * The above copyright notice and this permission notice shall be included
|
|---|
| 17 | * in all copies or substantial portions of the Software.
|
|---|
| 18 | *
|
|---|
| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|---|
| 20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|---|
| 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|---|
| 22 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|---|
| 23 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|---|
| 24 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|---|
| 25 | * IN THE SOFTWARE.
|
|---|
| 26 | *
|
|---|
| 27 | * Alternatively, the content of this file may be used under the terms of the
|
|---|
| 28 | * GPL version 2 or later, or LGPL version 2.1 or later.
|
|---|
| 29 | */
|
|---|
| 30 |
|
|---|
| 31 |
|
|---|
| 32 | /*********************************************************************************************************************************
|
|---|
| 33 | * Header Files *
|
|---|
| 34 | *********************************************************************************************************************************/
|
|---|
| 35 | #include <k/kHlp.h>
|
|---|
| 36 |
|
|---|
| 37 | #include "nthlp.h"
|
|---|
| 38 | #include "ntstat.h"
|
|---|
| 39 |
|
|---|
| 40 | #include <stdio.h>
|
|---|
| 41 | #include <mbstring.h>
|
|---|
| 42 | #include <wchar.h>
|
|---|
| 43 | //#include <intrin.h>
|
|---|
| 44 | //#include <setjmp.h>
|
|---|
| 45 | //#include <ctype.h>
|
|---|
| 46 |
|
|---|
| 47 |
|
|---|
| 48 | //#include <Windows.h>
|
|---|
| 49 | //#include <winternl.h>
|
|---|
| 50 |
|
|---|
| 51 | #include "kFsCache.h"
|
|---|
| 52 |
|
|---|
| 53 |
|
|---|
| 54 |
|
|---|
| 55 |
|
|---|
| 56 |
|
|---|
| 57 | /**
|
|---|
| 58 | * Retains a reference to a cache object, internal version.
|
|---|
| 59 | *
|
|---|
| 60 | * @returns pObj
|
|---|
| 61 | * @param pObj The object.
|
|---|
| 62 | */
|
|---|
| 63 | K_INLINE PKFSOBJ kFsCacheObjRetainInternal(PKFSOBJ pObj)
|
|---|
| 64 | {
|
|---|
| 65 | KU32 cRefs = ++pObj->cRefs;
|
|---|
| 66 | kHlpAssert(cRefs < 16384);
|
|---|
| 67 | K_NOREF(cRefs);
|
|---|
| 68 | return pObj;
|
|---|
| 69 | }
|
|---|
| 70 |
|
|---|
| 71 |
|
|---|
| 72 | #ifndef NDEBUG
|
|---|
| 73 |
|
|---|
| 74 | /**
|
|---|
| 75 | * Debug printing.
|
|---|
| 76 | * @param pszFormat Debug format string.
|
|---|
| 77 | * @param ... Format argument.
|
|---|
| 78 | */
|
|---|
| 79 | void kFsCacheDbgPrintfV(const char *pszFormat, va_list va)
|
|---|
| 80 | {
|
|---|
| 81 | if (1)
|
|---|
| 82 | {
|
|---|
| 83 | DWORD const dwSavedErr = GetLastError();
|
|---|
| 84 |
|
|---|
| 85 | fprintf(stderr, "debug: ");
|
|---|
| 86 | vfprintf(stderr, pszFormat, va);
|
|---|
| 87 |
|
|---|
| 88 | SetLastError(dwSavedErr);
|
|---|
| 89 | }
|
|---|
| 90 | }
|
|---|
| 91 |
|
|---|
| 92 |
|
|---|
| 93 | /**
|
|---|
| 94 | * Debug printing.
|
|---|
| 95 | * @param pszFormat Debug format string.
|
|---|
| 96 | * @param ... Format argument.
|
|---|
| 97 | */
|
|---|
| 98 | void kFsCacheDbgPrintf(const char *pszFormat, ...)
|
|---|
| 99 | {
|
|---|
| 100 | if (1)
|
|---|
| 101 | {
|
|---|
| 102 | va_list va;
|
|---|
| 103 | va_start(va, pszFormat);
|
|---|
| 104 | kFsCacheDbgPrintfV(pszFormat, va);
|
|---|
| 105 | va_end(va);
|
|---|
| 106 | }
|
|---|
| 107 | }
|
|---|
| 108 |
|
|---|
| 109 | #endif /* !NDEBUG */
|
|---|
| 110 |
|
|---|
| 111 |
|
|---|
| 112 |
|
|---|
| 113 | /**
|
|---|
| 114 | * Hashes a string.
|
|---|
| 115 | *
|
|---|
| 116 | * @returns 32-bit string hash.
|
|---|
| 117 | * @param pszString String to hash.
|
|---|
| 118 | */
|
|---|
| 119 | static KU32 kFsCacheStrHash(const char *pszString)
|
|---|
| 120 | {
|
|---|
| 121 | /* This algorithm was created for sdbm (a public-domain reimplementation of
|
|---|
| 122 | ndbm) database library. it was found to do well in scrambling bits,
|
|---|
| 123 | causing better distribution of the keys and fewer splits. it also happens
|
|---|
| 124 | to be a good general hashing function with good distribution. the actual
|
|---|
| 125 | function is hash(i) = hash(i - 1) * 65599 + str[i]; what is included below
|
|---|
| 126 | is the faster version used in gawk. [there is even a faster, duff-device
|
|---|
| 127 | version] the magic constant 65599 was picked out of thin air while
|
|---|
| 128 | experimenting with different constants, and turns out to be a prime.
|
|---|
| 129 | this is one of the algorithms used in berkeley db (see sleepycat) and
|
|---|
| 130 | elsewhere. */
|
|---|
| 131 | KU32 uHash = 0;
|
|---|
| 132 | KU32 uChar;
|
|---|
| 133 | while ((uChar = (unsigned char)*pszString++) != 0)
|
|---|
| 134 | uHash = uChar + (uHash << 6) + (uHash << 16) - uHash;
|
|---|
| 135 | return uHash;
|
|---|
| 136 | }
|
|---|
| 137 |
|
|---|
| 138 |
|
|---|
| 139 | /**
|
|---|
| 140 | * Hashes a string.
|
|---|
| 141 | *
|
|---|
| 142 | * @returns The string length.
|
|---|
| 143 | * @param pszString String to hash.
|
|---|
| 144 | * @param puHash Where to return the 32-bit string hash.
|
|---|
| 145 | */
|
|---|
| 146 | static KSIZE kFsCacheStrHashEx(const char *pszString, KU32 *puHash)
|
|---|
| 147 | {
|
|---|
| 148 | const char * const pszStart = pszString;
|
|---|
| 149 | KU32 uHash = 0;
|
|---|
| 150 | KU32 uChar;
|
|---|
| 151 | while ((uChar = (unsigned char)*pszString) != 0)
|
|---|
| 152 | {
|
|---|
| 153 | uHash = uChar + (uHash << 6) + (uHash << 16) - uHash;
|
|---|
| 154 | pszString++;
|
|---|
| 155 | }
|
|---|
| 156 | *puHash = uHash;
|
|---|
| 157 | return pszString - pszStart;
|
|---|
| 158 | }
|
|---|
| 159 |
|
|---|
| 160 |
|
|---|
| 161 | /**
|
|---|
| 162 | * Hashes a string.
|
|---|
| 163 | *
|
|---|
| 164 | * @returns The string length in wchar_t units.
|
|---|
| 165 | * @param pwszString String to hash.
|
|---|
| 166 | * @param puHash Where to return the 32-bit string hash.
|
|---|
| 167 | */
|
|---|
| 168 | static KSIZE kFsCacheUtf16HashEx(const wchar_t *pwszString, KU32 *puHash)
|
|---|
| 169 | {
|
|---|
| 170 | const wchar_t * const pwszStart = pwszString;
|
|---|
| 171 | KU32 uHash = 0;
|
|---|
| 172 | KU32 uChar;
|
|---|
| 173 | while ((uChar = *pwszString) != 0)
|
|---|
| 174 | {
|
|---|
| 175 | uHash = uChar + (uHash << 6) + (uHash << 16) - uHash;
|
|---|
| 176 | pwszString++;
|
|---|
| 177 | }
|
|---|
| 178 | *puHash = uHash;
|
|---|
| 179 | return pwszString - pwszStart;
|
|---|
| 180 | }
|
|---|
| 181 |
|
|---|
| 182 | #if 0
|
|---|
| 183 |
|
|---|
| 184 | /**
|
|---|
| 185 | * Converts the given string to unicode.
|
|---|
| 186 | *
|
|---|
| 187 | * @returns Length of the resulting string in wchar_t's.
|
|---|
| 188 | * @param pszSrc The source string.
|
|---|
| 189 | * @param pwszDst The destination buffer.
|
|---|
| 190 | * @param cwcDst The size of the destination buffer in wchar_t's.
|
|---|
| 191 | */
|
|---|
| 192 | static KSIZE kwStrToUtf16(const char *pszSrc, wchar_t *pwszDst, KSIZE cwcDst)
|
|---|
| 193 | {
|
|---|
| 194 | /* Just to the quick ASCII stuff for now. correct ansi code page stuff later some time. */
|
|---|
| 195 | KSIZE offDst = 0;
|
|---|
| 196 | while (offDst < cwcDst)
|
|---|
| 197 | {
|
|---|
| 198 | char ch = *pszSrc++;
|
|---|
| 199 | pwszDst[offDst++] = ch;
|
|---|
| 200 | if (!ch)
|
|---|
| 201 | return offDst - 1;
|
|---|
| 202 | kHlpAssert((unsigned)ch < 127);
|
|---|
| 203 | }
|
|---|
| 204 |
|
|---|
| 205 | pwszDst[offDst - 1] = '\0';
|
|---|
| 206 | return offDst;
|
|---|
| 207 | }
|
|---|
| 208 |
|
|---|
| 209 |
|
|---|
| 210 | /**
|
|---|
| 211 | * Converts the given UTF-16 to a normal string.
|
|---|
| 212 | *
|
|---|
| 213 | * @returns Length of the resulting string.
|
|---|
| 214 | * @param pwszSrc The source UTF-16 string.
|
|---|
| 215 | * @param pszDst The destination buffer.
|
|---|
| 216 | * @param cbDst The size of the destination buffer in bytes.
|
|---|
| 217 | */
|
|---|
| 218 | static KSIZE kwUtf16ToStr(const wchar_t *pwszSrc, char *pszDst, KSIZE cbDst)
|
|---|
| 219 | {
|
|---|
| 220 | /* Just to the quick ASCII stuff for now. correct ansi code page stuff later some time. */
|
|---|
| 221 | KSIZE offDst = 0;
|
|---|
| 222 | while (offDst < cbDst)
|
|---|
| 223 | {
|
|---|
| 224 | wchar_t wc = *pwszSrc++;
|
|---|
| 225 | pszDst[offDst++] = (char)wc;
|
|---|
| 226 | if (!wc)
|
|---|
| 227 | return offDst - 1;
|
|---|
| 228 | kHlpAssert((unsigned)wc < 127);
|
|---|
| 229 | }
|
|---|
| 230 |
|
|---|
| 231 | pszDst[offDst - 1] = '\0';
|
|---|
| 232 | return offDst;
|
|---|
| 233 | }
|
|---|
| 234 |
|
|---|
| 235 |
|
|---|
| 236 |
|
|---|
| 237 | /** UTF-16 string length. */
|
|---|
| 238 | static KSIZE kwUtf16Len(wchar_t const *pwsz)
|
|---|
| 239 | {
|
|---|
| 240 | KSIZE cwc = 0;
|
|---|
| 241 | while (*pwsz != '\0')
|
|---|
| 242 | cwc++, pwsz++;
|
|---|
| 243 | return cwc;
|
|---|
| 244 | }
|
|---|
| 245 |
|
|---|
| 246 | /**
|
|---|
| 247 | * Copy out the UTF-16 string following the convension of GetModuleFileName
|
|---|
| 248 | */
|
|---|
| 249 | static DWORD kwUtf16CopyStyle1(wchar_t const *pwszSrc, wchar_t *pwszDst, KSIZE cwcDst)
|
|---|
| 250 | {
|
|---|
| 251 | KSIZE cwcSrc = kwUtf16Len(pwszSrc);
|
|---|
| 252 | if (cwcSrc + 1 <= cwcDst)
|
|---|
| 253 | {
|
|---|
| 254 | kHlpMemCopy(pwszDst, pwszSrc, (cwcSrc + 1) * sizeof(wchar_t));
|
|---|
| 255 | return (DWORD)cwcSrc;
|
|---|
| 256 | }
|
|---|
| 257 | if (cwcDst > 0)
|
|---|
| 258 | {
|
|---|
| 259 | KSIZE cwcDstTmp = cwcDst - 1;
|
|---|
| 260 | pwszDst[cwcDstTmp] = '\0';
|
|---|
| 261 | if (cwcDstTmp > 0)
|
|---|
| 262 | kHlpMemCopy(pwszDst, pwszSrc, cwcDstTmp);
|
|---|
| 263 | }
|
|---|
| 264 | SetLastError(ERROR_INSUFFICIENT_BUFFER);
|
|---|
| 265 | return (DWORD)cwcDst;
|
|---|
| 266 | }
|
|---|
| 267 |
|
|---|
| 268 |
|
|---|
| 269 | /**
|
|---|
| 270 | * Copy out the ANSI string following the convension of GetModuleFileName
|
|---|
| 271 | */
|
|---|
| 272 | static DWORD kwStrCopyStyle1(char const *pszSrc, char *pszDst, KSIZE cbDst)
|
|---|
| 273 | {
|
|---|
| 274 | KSIZE cchSrc = kHlpStrLen(pszSrc);
|
|---|
| 275 | if (cchSrc + 1 <= cbDst)
|
|---|
| 276 | {
|
|---|
| 277 | kHlpMemCopy(pszDst, pszSrc, cchSrc + 1);
|
|---|
| 278 | return (DWORD)cchSrc;
|
|---|
| 279 | }
|
|---|
| 280 | if (cbDst > 0)
|
|---|
| 281 | {
|
|---|
| 282 | KSIZE cbDstTmp = cbDst - 1;
|
|---|
| 283 | pszDst[cbDstTmp] = '\0';
|
|---|
| 284 | if (cbDstTmp > 0)
|
|---|
| 285 | kHlpMemCopy(pszDst, pszSrc, cbDstTmp);
|
|---|
| 286 | }
|
|---|
| 287 | SetLastError(ERROR_INSUFFICIENT_BUFFER);
|
|---|
| 288 | return (DWORD)cbDst;
|
|---|
| 289 | }
|
|---|
| 290 |
|
|---|
| 291 |
|
|---|
| 292 | /**
|
|---|
| 293 | * Normalizes the path so we get a consistent hash.
|
|---|
| 294 | *
|
|---|
| 295 | * @returns status code.
|
|---|
| 296 | * @param pszPath The path.
|
|---|
| 297 | * @param pszNormPath The output buffer.
|
|---|
| 298 | * @param cbNormPath The size of the output buffer.
|
|---|
| 299 | */
|
|---|
| 300 | static int kwPathNormalize(const char *pszPath, char *pszNormPath, KSIZE cbNormPath)
|
|---|
| 301 | {
|
|---|
| 302 | char *pchSlash;
|
|---|
| 303 | KSIZE cchNormPath;
|
|---|
| 304 |
|
|---|
| 305 | /*
|
|---|
| 306 | * We hash these to speed stuff up (nt_fullpath isn't cheap and we're
|
|---|
| 307 | * gonna have many repeat queries and assume nobody do case changes to
|
|---|
| 308 | * anything essential while kmk is running).
|
|---|
| 309 | */
|
|---|
| 310 | KU32 uHashPath;
|
|---|
| 311 | KU32 cchPath = (KU32)kFsCacheStrHashEx(pszPath, &uHashPath);
|
|---|
| 312 | KU32 const idxHashTab = uHashPath % K_ELEMENTS(g_apFsNormalizedPathsA);
|
|---|
| 313 | PKFSNORMHASHA pHashEntry = g_apFsNormalizedPathsA[idxHashTab];
|
|---|
| 314 | if (pHashEntry)
|
|---|
| 315 | {
|
|---|
| 316 | do
|
|---|
| 317 | {
|
|---|
| 318 | if ( pHashEntry->uHashPath == uHashPath
|
|---|
| 319 | && pHashEntry->cchPath == cchPath
|
|---|
| 320 | && kHlpMemComp(pHashEntry->pszPath, pszPath, cchPath) == 0)
|
|---|
| 321 | {
|
|---|
| 322 | if (cbNormPath > pHashEntry->cchNormPath)
|
|---|
| 323 | {
|
|---|
| 324 | KFSCACHE_LOG(("kwPathNormalize(%s) - hit\n", pszPath));
|
|---|
| 325 | kHlpMemCopy(pszNormPath, pHashEntry->szNormPath, pHashEntry->cchNormPath + 1);
|
|---|
| 326 | return 0;
|
|---|
| 327 | }
|
|---|
| 328 | return KERR_BUFFER_OVERFLOW;
|
|---|
| 329 | }
|
|---|
| 330 | pHashEntry = pHashEntry->pNext;
|
|---|
| 331 | } while (pHashEntry);
|
|---|
| 332 | }
|
|---|
| 333 |
|
|---|
| 334 | /*
|
|---|
| 335 | * Do it the slow way.
|
|---|
| 336 | */
|
|---|
| 337 | nt_fullpath(pszPath, pszNormPath, cbNormPath);
|
|---|
| 338 | /** @todo nt_fullpath overflow handling?!?!? */
|
|---|
| 339 |
|
|---|
| 340 | pchSlash = kHlpStrChr(pszNormPath, '/');
|
|---|
| 341 | while (pchSlash)
|
|---|
| 342 | {
|
|---|
| 343 | *pchSlash = '\\';
|
|---|
| 344 | pchSlash = kHlpStrChr(pchSlash + 1, '/');
|
|---|
| 345 | }
|
|---|
| 346 |
|
|---|
| 347 | /*
|
|---|
| 348 | * Create a new hash table entry (ignore failures).
|
|---|
| 349 | */
|
|---|
| 350 | cchNormPath = kHlpStrLen(pszNormPath);
|
|---|
| 351 | if (cchNormPath < KU16_MAX && cchPath < KU16_MAX)
|
|---|
| 352 | {
|
|---|
| 353 | pHashEntry = (PKFSNORMHASHA)kHlpAlloc(sizeof(*pHashEntry) + cchNormPath + 1 + cchPath + 1);
|
|---|
| 354 | if (pHashEntry)
|
|---|
| 355 | {
|
|---|
| 356 | pHashEntry->cchNormPath = (KU16)cchNormPath;
|
|---|
| 357 | pHashEntry->cchPath = (KU16)cchPath;
|
|---|
| 358 | pHashEntry->uHashPath = uHashPath;
|
|---|
| 359 | pHashEntry->pszPath = (char *)kHlpMemCopy(&pHashEntry->szNormPath[cchNormPath + 1], pszPath, cchPath + 1);
|
|---|
| 360 | kHlpMemCopy(pHashEntry->szNormPath, pszNormPath, cchNormPath + 1);
|
|---|
| 361 |
|
|---|
| 362 | pHashEntry->pNext = g_apFsNormalizedPathsA[idxHashTab];
|
|---|
| 363 | g_apFsNormalizedPathsA[idxHashTab] = pHashEntry;
|
|---|
| 364 | }
|
|---|
| 365 | }
|
|---|
| 366 |
|
|---|
| 367 | return 0;
|
|---|
| 368 | }
|
|---|
| 369 |
|
|---|
| 370 |
|
|---|
| 371 | /**
|
|---|
| 372 | * Get the pointer to the filename part of the path.
|
|---|
| 373 | *
|
|---|
| 374 | * @returns Pointer to where the filename starts within the string pointed to by pszFilename.
|
|---|
| 375 | * @returns Pointer to the terminator char if no filename.
|
|---|
| 376 | * @param pszPath The path to parse.
|
|---|
| 377 | */
|
|---|
| 378 | static wchar_t *kwPathGetFilenameW(const wchar_t *pwszPath)
|
|---|
| 379 | {
|
|---|
| 380 | const wchar_t *pwszLast = NULL;
|
|---|
| 381 | for (;;)
|
|---|
| 382 | {
|
|---|
| 383 | wchar_t wc = *pwszPath;
|
|---|
| 384 | #if K_OS == K_OS_OS2 || K_OS == K_OS_WINDOWS
|
|---|
| 385 | if (wc == '/' || wc == '\\' || wc == ':')
|
|---|
| 386 | {
|
|---|
| 387 | while ((wc = *++pwszPath) == '/' || wc == '\\' || wc == ':')
|
|---|
| 388 | /* nothing */;
|
|---|
| 389 | pwszLast = pwszPath;
|
|---|
| 390 | }
|
|---|
| 391 | #else
|
|---|
| 392 | if (wc == '/')
|
|---|
| 393 | {
|
|---|
| 394 | while ((wc = *++pszFilename) == '/')
|
|---|
| 395 | /* betsuni */;
|
|---|
| 396 | pwszLast = pwszPath;
|
|---|
| 397 | }
|
|---|
| 398 | #endif
|
|---|
| 399 | if (!wc)
|
|---|
| 400 | return (wchar_t *)(pwszLast ? pwszLast : pwszPath);
|
|---|
| 401 | pwszPath++;
|
|---|
| 402 | }
|
|---|
| 403 | }
|
|---|
| 404 |
|
|---|
| 405 |
|
|---|
| 406 | /**
|
|---|
| 407 | * Check if the path leads to a regular file (that exists).
|
|---|
| 408 | *
|
|---|
| 409 | * @returns K_TRUE / K_FALSE
|
|---|
| 410 | * @param pszPath Path to the file to check out.
|
|---|
| 411 | */
|
|---|
| 412 | static KBOOL kwLdrModuleIsRegularFile(const char *pszPath)
|
|---|
| 413 | {
|
|---|
| 414 | /* For stuff with .DLL extensions, we can use the GetFileAttribute cache to speed this up! */
|
|---|
| 415 | KSIZE cchPath = kHlpStrLen(pszPath);
|
|---|
| 416 | if ( cchPath > 3
|
|---|
| 417 | && pszPath[cchPath - 4] == '.'
|
|---|
| 418 | && (pszPath[cchPath - 3] == 'd' || pszPath[cchPath - 3] == 'D')
|
|---|
| 419 | && (pszPath[cchPath - 2] == 'l' || pszPath[cchPath - 2] == 'L')
|
|---|
| 420 | && (pszPath[cchPath - 1] == 'l' || pszPath[cchPath - 1] == 'L') )
|
|---|
| 421 | {
|
|---|
| 422 | PKFSOBJ pFsObj = kFsCacheLookupA(pszPath);
|
|---|
| 423 | if (pFsObj)
|
|---|
| 424 | {
|
|---|
| 425 | if (!(pFsObj->fAttribs & (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_DEVICE))) /* also checks invalid */
|
|---|
| 426 | return K_TRUE;
|
|---|
| 427 | }
|
|---|
| 428 | }
|
|---|
| 429 | else
|
|---|
| 430 | {
|
|---|
| 431 | BirdStat_T Stat;
|
|---|
| 432 | int rc = birdStatFollowLink(pszPath, &Stat);
|
|---|
| 433 | if (rc == 0)
|
|---|
| 434 | {
|
|---|
| 435 | if (S_ISREG(Stat.st_mode))
|
|---|
| 436 | return K_TRUE;
|
|---|
| 437 | }
|
|---|
| 438 | }
|
|---|
| 439 | return K_FALSE;
|
|---|
| 440 | }
|
|---|
| 441 |
|
|---|
| 442 |
|
|---|
| 443 |
|
|---|
| 444 |
|
|---|
| 445 |
|
|---|
| 446 |
|
|---|
| 447 | /**
|
|---|
| 448 | * Helper for getting the extension of a UTF-16 path.
|
|---|
| 449 | *
|
|---|
| 450 | * @returns Pointer to the extension or the terminator.
|
|---|
| 451 | * @param pwszPath The path.
|
|---|
| 452 | * @param pcwcExt Where to return the length of the extension.
|
|---|
| 453 | */
|
|---|
| 454 | static wchar_t const *kwFsPathGetExtW(wchar_t const *pwszPath, KSIZE *pcwcExt)
|
|---|
| 455 | {
|
|---|
| 456 | wchar_t const *pwszName = pwszPath;
|
|---|
| 457 | wchar_t const *pwszExt = NULL;
|
|---|
| 458 | for (;;)
|
|---|
| 459 | {
|
|---|
| 460 | wchar_t const wc = *pwszPath++;
|
|---|
| 461 | if (wc == '.')
|
|---|
| 462 | pwszExt = pwszPath;
|
|---|
| 463 | else if (wc == '/' || wc == '\\' || wc == ':')
|
|---|
| 464 | {
|
|---|
| 465 | pwszName = pwszPath;
|
|---|
| 466 | pwszExt = NULL;
|
|---|
| 467 | }
|
|---|
| 468 | else if (wc == '\0')
|
|---|
| 469 | {
|
|---|
| 470 | if (pwszExt)
|
|---|
| 471 | {
|
|---|
| 472 | *pcwcExt = pwszPath - pwszExt - 1;
|
|---|
| 473 | return pwszExt;
|
|---|
| 474 | }
|
|---|
| 475 | *pcwcExt = 0;
|
|---|
| 476 | return pwszPath - 1;
|
|---|
| 477 | }
|
|---|
| 478 | }
|
|---|
| 479 | }
|
|---|
| 480 | #endif
|
|---|
| 481 |
|
|---|
| 482 |
|
|---|
| 483 | /**
|
|---|
| 484 | * Looks for '..' in the path.
|
|---|
| 485 | *
|
|---|
| 486 | * @returns K_TRUE if '..' component found, K_FALSE if not.
|
|---|
| 487 | * @param pszPath The path.
|
|---|
| 488 | * @param cchPath The length of the path.
|
|---|
| 489 | */
|
|---|
| 490 | static KBOOL kFsCacheHasDotDotA(const char *pszPath, KSIZE cchPath)
|
|---|
| 491 | {
|
|---|
| 492 | const char *pchDot = (const char *)kHlpMemChr(pszPath, '.', cchPath);
|
|---|
| 493 | while (pchDot)
|
|---|
| 494 | {
|
|---|
| 495 | if (pchDot[1] != '.')
|
|---|
| 496 | pchDot = (const char *)kHlpMemChr(pchDot + 1, '.', &pszPath[cchPath] - pchDot - 1);
|
|---|
| 497 | else
|
|---|
| 498 | {
|
|---|
| 499 | char ch;
|
|---|
| 500 | if ( (ch = pchDot[2]) == '\0'
|
|---|
| 501 | && IS_SLASH(ch))
|
|---|
| 502 | {
|
|---|
| 503 | if (pchDot == pszPath)
|
|---|
| 504 | return K_TRUE;
|
|---|
| 505 | ch = pchDot[-1];
|
|---|
| 506 | if ( IS_SLASH(ch)
|
|---|
| 507 | || ch == ':')
|
|---|
| 508 | return K_TRUE;
|
|---|
| 509 | }
|
|---|
| 510 | pchDot = (const char *)kHlpMemChr(pchDot + 2, '.', &pszPath[cchPath] - pchDot - 2);
|
|---|
| 511 | }
|
|---|
| 512 | }
|
|---|
| 513 |
|
|---|
| 514 | return K_FALSE;
|
|---|
| 515 | }
|
|---|
| 516 |
|
|---|
| 517 |
|
|---|
| 518 | /**
|
|---|
| 519 | * Looks for '..' in the path.
|
|---|
| 520 | *
|
|---|
| 521 | * @returns K_TRUE if '..' component found, K_FALSE if not.
|
|---|
| 522 | * @param pwszPath The path.
|
|---|
| 523 | * @param cwcPath The length of the path (in wchar_t's).
|
|---|
| 524 | */
|
|---|
| 525 | static KBOOL kFsCacheHasDotDotW(const wchar_t *pwszPath, KSIZE cwcPath)
|
|---|
| 526 | {
|
|---|
| 527 | const wchar_t *pwcDot = wmemchr(pwszPath, '.', cwcPath);
|
|---|
| 528 | while (pwcDot)
|
|---|
| 529 | {
|
|---|
| 530 | if (pwcDot[1] != '.')
|
|---|
| 531 | pwcDot = wmemchr(pwcDot + 1, '.', &pwszPath[cwcPath] - pwcDot - 1);
|
|---|
| 532 | else
|
|---|
| 533 | {
|
|---|
| 534 | wchar_t wch;
|
|---|
| 535 | if ( (wch = pwcDot[2]) == '\0'
|
|---|
| 536 | && IS_SLASH(wch))
|
|---|
| 537 | {
|
|---|
| 538 | if (pwcDot == pwszPath)
|
|---|
| 539 | return K_TRUE;
|
|---|
| 540 | wch = pwcDot[-1];
|
|---|
| 541 | if ( IS_SLASH(wch)
|
|---|
| 542 | || wch == ':')
|
|---|
| 543 | return K_TRUE;
|
|---|
| 544 | }
|
|---|
| 545 | pwcDot = wmemchr(pwcDot + 2, '.', &pwszPath[cwcPath] - pwcDot - 2);
|
|---|
| 546 | }
|
|---|
| 547 | }
|
|---|
| 548 |
|
|---|
| 549 | return K_FALSE;
|
|---|
| 550 | }
|
|---|
| 551 |
|
|---|
| 552 |
|
|---|
| 553 | /**
|
|---|
| 554 | * Creates an ANSI hash table entry for the given path.
|
|---|
| 555 | *
|
|---|
| 556 | * @returns The hash table entry or NULL if out of memory.
|
|---|
| 557 | * @param pCache The hash
|
|---|
| 558 | * @param pFsObj The resulting object.
|
|---|
| 559 | * @param pszPath The path.
|
|---|
| 560 | * @param cchPath The length of the path.
|
|---|
| 561 | * @param uHashPath The hash of the path.
|
|---|
| 562 | * @param idxHashTab The hash table index of the path.
|
|---|
| 563 | * @param enmError The lookup error.
|
|---|
| 564 | */
|
|---|
| 565 | static PKFSHASHA kFsCacheCreatePathHashTabEntryA(PKFSCACHE pCache, PKFSOBJ pFsObj, const char *pszPath, KU32 cchPath,
|
|---|
| 566 | KU32 uHashPath, KU32 idxHashTab, KFSLOOKUPERROR enmError)
|
|---|
| 567 | {
|
|---|
| 568 | PKFSHASHA pHashEntry = (PKFSHASHA)kHlpAlloc(sizeof(*pHashEntry) + cchPath + 1);
|
|---|
| 569 | if (pHashEntry)
|
|---|
| 570 | {
|
|---|
| 571 | pHashEntry->uHashPath = uHashPath;
|
|---|
| 572 | pHashEntry->cchPath = cchPath;
|
|---|
| 573 | pHashEntry->pszPath = (const char *)kHlpMemCopy(pHashEntry + 1, pszPath, cchPath + 1);
|
|---|
| 574 | pHashEntry->pFsObj = pFsObj;
|
|---|
| 575 | pHashEntry->enmError = enmError;
|
|---|
| 576 | if (pFsObj)
|
|---|
| 577 | pHashEntry->uCacheGen = pCache->uGeneration;
|
|---|
| 578 | else if (enmError != KFSLOOKUPERROR_UNSUPPORTED)
|
|---|
| 579 | pHashEntry->uCacheGen = pCache->uGenerationMissing;
|
|---|
| 580 | else
|
|---|
| 581 | pHashEntry->uCacheGen = KFSOBJ_CACHE_GEN_IGNORE;
|
|---|
| 582 |
|
|---|
| 583 | pHashEntry->pNext = pCache->apAnsiPaths[idxHashTab];
|
|---|
| 584 | pCache->apAnsiPaths[idxHashTab] = pHashEntry;
|
|---|
| 585 |
|
|---|
| 586 | pCache->cbAnsiPaths += sizeof(*pHashEntry) + cchPath + 1;
|
|---|
| 587 | pCache->cAnsiPaths++;
|
|---|
| 588 | if (pHashEntry->pNext)
|
|---|
| 589 | pCache->cAnsiPathCollisions++;
|
|---|
| 590 | }
|
|---|
| 591 | return pHashEntry;
|
|---|
| 592 | }
|
|---|
| 593 |
|
|---|
| 594 |
|
|---|
| 595 | /**
|
|---|
| 596 | * Creates an UTF-16 hash table entry for the given path.
|
|---|
| 597 | *
|
|---|
| 598 | * @returns The hash table entry or NULL if out of memory.
|
|---|
| 599 | * @param pCache The hash
|
|---|
| 600 | * @param pFsObj The resulting object.
|
|---|
| 601 | * @param pwszPath The path.
|
|---|
| 602 | * @param cwcPath The length of the path (in wchar_t's).
|
|---|
| 603 | * @param uHashPath The hash of the path.
|
|---|
| 604 | * @param idxHashTab The hash table index of the path.
|
|---|
| 605 | * @param enmError The lookup error.
|
|---|
| 606 | */
|
|---|
| 607 | static PKFSHASHW kFsCacheCreatePathHashTabEntryW(PKFSCACHE pCache, PKFSOBJ pFsObj, const wchar_t *pwszPath, KU32 cwcPath,
|
|---|
| 608 | KU32 uHashPath, KU32 idxHashTab, KFSLOOKUPERROR enmError)
|
|---|
| 609 | {
|
|---|
| 610 | PKFSHASHW pHashEntry = (PKFSHASHW)kHlpAlloc(sizeof(*pHashEntry) + (cwcPath + 1) * sizeof(wchar_t));
|
|---|
| 611 | if (pHashEntry)
|
|---|
| 612 | {
|
|---|
| 613 | pHashEntry->uHashPath = uHashPath;
|
|---|
| 614 | pHashEntry->cwcPath = cwcPath;
|
|---|
| 615 | pHashEntry->pwszPath = (const wchar_t *)kHlpMemCopy(pHashEntry + 1, pwszPath, (cwcPath + 1) * sizeof(wchar_t));
|
|---|
| 616 | pHashEntry->pFsObj = pFsObj;
|
|---|
| 617 | pHashEntry->enmError = enmError;
|
|---|
| 618 | if (pFsObj)
|
|---|
| 619 | pHashEntry->uCacheGen = pCache->uGeneration;
|
|---|
| 620 | else if (enmError != KFSLOOKUPERROR_UNSUPPORTED)
|
|---|
| 621 | pHashEntry->uCacheGen = pCache->uGenerationMissing;
|
|---|
| 622 | else
|
|---|
| 623 | pHashEntry->uCacheGen = KFSOBJ_CACHE_GEN_IGNORE;
|
|---|
| 624 |
|
|---|
| 625 | pHashEntry->pNext = pCache->apUtf16Paths[idxHashTab];
|
|---|
| 626 | pCache->apUtf16Paths[idxHashTab] = pHashEntry;
|
|---|
| 627 |
|
|---|
| 628 | pCache->cbUtf16Paths += sizeof(*pHashEntry) + (cwcPath + 1) * sizeof(wchar_t);
|
|---|
| 629 | pCache->cUtf16Paths++;
|
|---|
| 630 | if (pHashEntry->pNext)
|
|---|
| 631 | pCache->cAnsiPathCollisions++;
|
|---|
| 632 | }
|
|---|
| 633 | return pHashEntry;
|
|---|
| 634 | }
|
|---|
| 635 |
|
|---|
| 636 |
|
|---|
| 637 | /**
|
|---|
| 638 | * Links the child in under the parent.
|
|---|
| 639 | *
|
|---|
| 640 | * @returns K_TRUE on success, K_FALSE if out of memory.
|
|---|
| 641 | * @param pParent The parent node.
|
|---|
| 642 | * @param pChild The child node.
|
|---|
| 643 | */
|
|---|
| 644 | static KBOOL kFsCacheDirAddChild(PKFSCACHE pCache, PKFSDIR pParent, PKFSOBJ pChild, KFSLOOKUPERROR *penmError)
|
|---|
| 645 | {
|
|---|
| 646 | if ((pParent->cChildren % 16) == 0)
|
|---|
| 647 | {
|
|---|
| 648 | void *pvNew = kHlpRealloc(pParent->papChildren, (pParent->cChildren + 16) * sizeof(pParent->papChildren[0]));
|
|---|
| 649 | if (!pvNew)
|
|---|
| 650 | return K_FALSE;
|
|---|
| 651 | pParent->papChildren = (PKFSOBJ *)pvNew;
|
|---|
| 652 | pCache->cbObjects += 16 * sizeof(pParent->papChildren[0]);
|
|---|
| 653 | }
|
|---|
| 654 | pParent->papChildren[pParent->cChildren++] = pChild;
|
|---|
| 655 | return K_TRUE;
|
|---|
| 656 | }
|
|---|
| 657 |
|
|---|
| 658 |
|
|---|
| 659 | /**
|
|---|
| 660 | * Creates a new cache object.
|
|---|
| 661 | *
|
|---|
| 662 | * @returns Pointer (with 1 reference) to the new object. The object will not
|
|---|
| 663 | * be linked to the parent directory yet.
|
|---|
| 664 | *
|
|---|
| 665 | * NULL if we're out of memory.
|
|---|
| 666 | *
|
|---|
| 667 | * @param pCache The cache.
|
|---|
| 668 | * @param pParent The parent directory.
|
|---|
| 669 | * @param pszName The ANSI name.
|
|---|
| 670 | * @param cchName The length of the ANSI name.
|
|---|
| 671 | * @param pwszName The UTF-16 name.
|
|---|
| 672 | * @param cwcName The length of the UTF-16 name.
|
|---|
| 673 | * @param pszShortName The ANSI short name, NULL if none.
|
|---|
| 674 | * @param cchShortName The length of the ANSI short name, 0 if none.
|
|---|
| 675 | * @param pwszShortName The UTF-16 short name, NULL if none.
|
|---|
| 676 | * @param cwcShortName The length of the UTF-16 short name, 0 if none.
|
|---|
| 677 | * @param bObjType The objct type.
|
|---|
| 678 | * @param penmError Where to explain failures.
|
|---|
| 679 | */
|
|---|
| 680 | PKFSOBJ kFsCacheCreateObject(PKFSCACHE pCache, PKFSDIR pParent,
|
|---|
| 681 | char const *pszName, KU16 cchName, wchar_t const *pwszName, KU16 cwcName,
|
|---|
| 682 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 683 | char const *pszShortName, KU16 cchShortName, wchar_t const *pwszShortName, KU16 cwcShortName,
|
|---|
| 684 | #endif
|
|---|
| 685 | KU8 bObjType, KFSLOOKUPERROR *penmError)
|
|---|
| 686 | {
|
|---|
| 687 | /*
|
|---|
| 688 | * Allocate the object.
|
|---|
| 689 | */
|
|---|
| 690 | KBOOL const fDirish = bObjType != KFSOBJ_TYPE_FILE && bObjType == KFSOBJ_TYPE_OTHER;
|
|---|
| 691 | KSIZE const cbObj = (fDirish ? sizeof(KFSDIR) : sizeof(KFSOBJ))
|
|---|
| 692 | + (cwcName + 1) * sizeof(wchar_t) + cchName + 1
|
|---|
| 693 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 694 | + (cwcShortName > 0 ? (cwcShortName + 1) * sizeof(wchar_t) + cchShortName + 1 : 0)
|
|---|
| 695 | #endif
|
|---|
| 696 | ;
|
|---|
| 697 | PKFSOBJ pObj;
|
|---|
| 698 | kHlpAssert(pCache->u32Magic == KFSCACHE_MAGIC);
|
|---|
| 699 |
|
|---|
| 700 | pObj = (PKFSOBJ)kHlpAlloc(cbObj);
|
|---|
| 701 | if (pObj)
|
|---|
| 702 | {
|
|---|
| 703 | KU8 *pbExtra = (KU8 *)(pObj + 1);
|
|---|
| 704 |
|
|---|
| 705 | pCache->cbObjects += cbObj;
|
|---|
| 706 | pCache->cObjects++;
|
|---|
| 707 |
|
|---|
| 708 | /*
|
|---|
| 709 | * Initialize the object.
|
|---|
| 710 | */
|
|---|
| 711 | pObj->u32Magic = KFSOBJ_MAGIC;
|
|---|
| 712 | pObj->cRefs = 1;
|
|---|
| 713 | pObj->uCacheGen = bObjType != KFSOBJ_TYPE_MISSING ? pCache->uGeneration : pCache->uGenerationMissing;
|
|---|
| 714 | pObj->bObjType = bObjType;
|
|---|
| 715 | pObj->fHaveStats = K_FALSE;
|
|---|
| 716 | pObj->abUnused[0] = K_FALSE;
|
|---|
| 717 | pObj->abUnused[1] = K_FALSE;
|
|---|
| 718 | pObj->fFlags = pParent->Obj.fFlags;
|
|---|
| 719 | pObj->pParent = pParent;
|
|---|
| 720 | pObj->pUserDataHead = NULL;
|
|---|
| 721 |
|
|---|
| 722 | #ifdef KFSCACHE_CFG_UTF16
|
|---|
| 723 | pObj->cwcParent = pParent->Obj.cwcParent + pParent->Obj.cwcName + !!pParent->Obj.cwcName;
|
|---|
| 724 | pObj->pwszName = (wchar_t *)kHlpMemCopy(pbExtra, pwszName, cwcName * sizeof(wchar_t));
|
|---|
| 725 | pbExtra += cwcName * sizeof(wchar_t);
|
|---|
| 726 | *pbExtra++ = '\0';
|
|---|
| 727 | *pbExtra++ = '\0';
|
|---|
| 728 | # ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 729 | pObj->cwcShortParent = pParent->Obj.cwcShortParent + pParent->Obj.cwcShortName + !!pParent->Obj.cwcShortName;
|
|---|
| 730 | if (cwcShortName)
|
|---|
| 731 | {
|
|---|
| 732 | pObj->pwszShortName = (wchar_t *)kHlpMemCopy(pbExtra, pwszShortName, cwcShortName * sizeof(wchar_t));
|
|---|
| 733 | pbExtra += cwcShortName * sizeof(wchar_t);
|
|---|
| 734 | *pbExtra++ = '\0';
|
|---|
| 735 | *pbExtra++ = '\0';
|
|---|
| 736 | }
|
|---|
| 737 | else
|
|---|
| 738 | {
|
|---|
| 739 | pObj->pwszShortName = pObj->pwszName;
|
|---|
| 740 | pObj->cwcShortName = pObj->cwcName;
|
|---|
| 741 | }
|
|---|
| 742 | # endif
|
|---|
| 743 | #endif
|
|---|
| 744 | pObj->cchParent = pParent->Obj.cchParent + pParent->Obj.cchName + !!pParent->Obj.cchName;
|
|---|
| 745 | pObj->pszName = (char *)kHlpMemCopy(pbExtra, pszName, cchName);
|
|---|
| 746 | pbExtra += cchName;
|
|---|
| 747 | *pbExtra++ = '\0';
|
|---|
| 748 | # ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 749 | pObj->cchShortParent = pParent->Obj.cchShortParent + pParent->Obj.cchShortName + !!pParent->Obj.cchShortName;
|
|---|
| 750 | if (cchShortName)
|
|---|
| 751 | {
|
|---|
| 752 | pObj->pszShortName = (char *)kHlpMemCopy(pbExtra, pszShortName, cchShortName);
|
|---|
| 753 | pbExtra += cchShortName;
|
|---|
| 754 | *pbExtra++ = '\0';
|
|---|
| 755 | }
|
|---|
| 756 | else
|
|---|
| 757 | {
|
|---|
| 758 | pObj->pszShortName = pObj->pszName;
|
|---|
| 759 | pObj->cchShortName = pObj->cchName;
|
|---|
| 760 | }
|
|---|
| 761 | #endif
|
|---|
| 762 | kHlpAssert(pbExtra - (KU8 *)pObj == cbObj);
|
|---|
| 763 |
|
|---|
| 764 | /*
|
|---|
| 765 | * Type specific initilization.
|
|---|
| 766 | */
|
|---|
| 767 | if (fDirish)
|
|---|
| 768 | {
|
|---|
| 769 | PKFSDIR pDirObj = (PKFSDIR)pObj;
|
|---|
| 770 | pDirObj->cChildren = 0;
|
|---|
| 771 | pDirObj->papChildren = NULL;
|
|---|
| 772 | pDirObj->cHashTab = 0;
|
|---|
| 773 | pDirObj->paHashTab = NULL;
|
|---|
| 774 | pDirObj->hDir = INVALID_HANDLE_VALUE;
|
|---|
| 775 | pDirObj->uDevNo = pParent->uDevNo;
|
|---|
| 776 | pDirObj->fPopulated = K_FALSE;
|
|---|
| 777 | }
|
|---|
| 778 | }
|
|---|
| 779 | else
|
|---|
| 780 | *penmError = KFSLOOKUPERROR_OUT_OF_MEMORY;
|
|---|
| 781 | return pObj;
|
|---|
| 782 | }
|
|---|
| 783 |
|
|---|
| 784 |
|
|---|
| 785 | /**
|
|---|
| 786 | * Creates a new object given wide char names.
|
|---|
| 787 | *
|
|---|
| 788 | * This function just converts the paths and calls kFsCacheCreateObject.
|
|---|
| 789 | *
|
|---|
| 790 | *
|
|---|
| 791 | * @returns Pointer (with 1 reference) to the new object. The object will not
|
|---|
| 792 | * be linked to the parent directory yet.
|
|---|
| 793 | *
|
|---|
| 794 | * NULL if we're out of memory.
|
|---|
| 795 | *
|
|---|
| 796 | * @param pCache The cache.
|
|---|
| 797 | * @param pParent The parent directory.
|
|---|
| 798 | * @param pszName The ANSI name.
|
|---|
| 799 | * @param cchName The length of the ANSI name.
|
|---|
| 800 | * @param pwszName The UTF-16 name.
|
|---|
| 801 | * @param cwcName The length of the UTF-16 name.
|
|---|
| 802 | * @param pwszShortName The UTF-16 short name, NULL if none.
|
|---|
| 803 | * @param cwcShortName The length of the UTF-16 short name, 0 if none.
|
|---|
| 804 | * @param bObjType The objct type.
|
|---|
| 805 | * @param penmError Where to explain failures.
|
|---|
| 806 | */
|
|---|
| 807 | PKFSOBJ kFsCacheCreateObjectW(PKFSCACHE pCache, PKFSDIR pParent, wchar_t const *pwszName, KU32 cwcName,
|
|---|
| 808 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 809 | wchar_t const *pwszShortName, KU32 cwcShortName,
|
|---|
| 810 | #endif
|
|---|
| 811 | KU8 bObjType, KFSLOOKUPERROR *penmError)
|
|---|
| 812 | {
|
|---|
| 813 | /* Convert names to ANSI first so we know their lengths. */
|
|---|
| 814 | char szName[KFSCACHE_CFG_MAX_ANSI_NAME];
|
|---|
| 815 | int cchName = WideCharToMultiByte(CP_ACP, 0, pwszName, cwcName, szName, sizeof(szName) - 1, NULL, NULL);
|
|---|
| 816 | if (cchName >= 0)
|
|---|
| 817 | {
|
|---|
| 818 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 819 | char szShortName[12*3 + 1];
|
|---|
| 820 | int cchShortName = 0;
|
|---|
| 821 | if ( cwcShortName == 0
|
|---|
| 822 | || (cchShortName = WideCharToMultiByte(CP_ACP, 0, pwszShortName, cwcShortName,
|
|---|
| 823 | szShortName, sizeof(szShortName) - 1, NULL, NULL)) > 0)
|
|---|
| 824 | #endif
|
|---|
| 825 | {
|
|---|
| 826 | return kFsCacheCreateObject(pCache, pParent,
|
|---|
| 827 | szName, cchName, pwszName, cwcName,
|
|---|
| 828 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 829 | szShortName, cchShortName, pwszShortName, cwcShortName,
|
|---|
| 830 | #endif
|
|---|
| 831 | bObjType, penmError);
|
|---|
| 832 | }
|
|---|
| 833 | }
|
|---|
| 834 | *penmError = KFSLOOKUPERROR_ANSI_CONVERSION_ERROR;
|
|---|
| 835 | return NULL;
|
|---|
| 836 | }
|
|---|
| 837 |
|
|---|
| 838 |
|
|---|
| 839 | /**
|
|---|
| 840 | * Creates a missing object.
|
|---|
| 841 | *
|
|---|
| 842 | * This is used for caching negative results.
|
|---|
| 843 | *
|
|---|
| 844 | * @returns Pointer to the newly created object on success (already linked into
|
|---|
| 845 | * pParent). No reference.
|
|---|
| 846 | *
|
|---|
| 847 | * NULL on failure.
|
|---|
| 848 | *
|
|---|
| 849 | * @param pCache The cache.
|
|---|
| 850 | * @param pParent The parent directory.
|
|---|
| 851 | * @param pchName The name.
|
|---|
| 852 | * @param cchName The length of the name.
|
|---|
| 853 | * @param penmError Where to return failure explanations.
|
|---|
| 854 | */
|
|---|
| 855 | static PKFSOBJ kFsCacheCreateMissingA(PKFSCACHE pCache, PKFSDIR pParent, const char *pchName, KU32 cchName,
|
|---|
| 856 | KFSLOOKUPERROR *penmError)
|
|---|
| 857 | {
|
|---|
| 858 | /*
|
|---|
| 859 | * Just convert the name to UTF-16 and call kFsCacheCreateObject to do the job.
|
|---|
| 860 | */
|
|---|
| 861 | wchar_t wszName[KFSCACHE_CFG_MAX_PATH];
|
|---|
| 862 | int cwcName = MultiByteToWideChar(CP_ACP, 0, pchName, cchName, wszName, KFSCACHE_CFG_MAX_UTF16_NAME - 1);
|
|---|
| 863 | if (cwcName > 0)
|
|---|
| 864 | {
|
|---|
| 865 | /** @todo check that it actually doesn't exists before we add it. We should not
|
|---|
| 866 | * trust the directory enumeration here, or maybe we should?? */
|
|---|
| 867 |
|
|---|
| 868 | PKFSOBJ pMissing = kFsCacheCreateObject(pCache, pParent, pchName, cchName, wszName, cwcName,
|
|---|
| 869 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 870 | NULL, 0, NULL, 0,
|
|---|
| 871 | #endif
|
|---|
| 872 | KFSOBJ_TYPE_MISSING, penmError);
|
|---|
| 873 | if (pMissing)
|
|---|
| 874 | {
|
|---|
| 875 | KBOOL fRc = kFsCacheDirAddChild(pCache, pParent, pMissing, penmError);
|
|---|
| 876 | kFsCacheObjRelease(pCache, pMissing);
|
|---|
| 877 | return fRc ? pMissing : NULL;
|
|---|
| 878 | }
|
|---|
| 879 | return NULL;
|
|---|
| 880 | }
|
|---|
| 881 | *penmError = KFSLOOKUPERROR_UTF16_CONVERSION_ERROR;
|
|---|
| 882 | return NULL;
|
|---|
| 883 | }
|
|---|
| 884 |
|
|---|
| 885 |
|
|---|
| 886 | /**
|
|---|
| 887 | * Creates a missing object, UTF-16 version.
|
|---|
| 888 | *
|
|---|
| 889 | * This is used for caching negative results.
|
|---|
| 890 | *
|
|---|
| 891 | * @returns Pointer to the newly created object on success (already linked into
|
|---|
| 892 | * pParent). No reference.
|
|---|
| 893 | *
|
|---|
| 894 | * NULL on failure.
|
|---|
| 895 | *
|
|---|
| 896 | * @param pCache The cache.
|
|---|
| 897 | * @param pParent The parent directory.
|
|---|
| 898 | * @param pwcName The name.
|
|---|
| 899 | * @param cwcName The length of the name.
|
|---|
| 900 | * @param penmError Where to return failure explanations.
|
|---|
| 901 | */
|
|---|
| 902 | static PKFSOBJ kFsCacheCreateMissingW(PKFSCACHE pCache, PKFSDIR pParent, const wchar_t *pwcName, KU32 cwcName,
|
|---|
| 903 | KFSLOOKUPERROR *penmError)
|
|---|
| 904 | {
|
|---|
| 905 | /** @todo check that it actually doesn't exists before we add it. We should not
|
|---|
| 906 | * trust the directory enumeration here, or maybe we should?? */
|
|---|
| 907 | PKFSOBJ pMissing = kFsCacheCreateObjectW(pCache, pParent, pwcName, cwcName,
|
|---|
| 908 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 909 | NULL, 0,
|
|---|
| 910 | #endif
|
|---|
| 911 | KFSOBJ_TYPE_MISSING, penmError);
|
|---|
| 912 | if (pMissing)
|
|---|
| 913 | {
|
|---|
| 914 | KBOOL fRc = kFsCacheDirAddChild(pCache, pParent, pMissing, penmError);
|
|---|
| 915 | kFsCacheObjRelease(pCache, pMissing);
|
|---|
| 916 | return fRc ? pMissing : NULL;
|
|---|
| 917 | }
|
|---|
| 918 | return NULL;
|
|---|
| 919 | }
|
|---|
| 920 |
|
|---|
| 921 |
|
|---|
| 922 | /**
|
|---|
| 923 | * Does the initial directory populating or refreshes it if it has been
|
|---|
| 924 | * invalidated.
|
|---|
| 925 | *
|
|---|
| 926 | * This assumes the parent directory is opened.
|
|---|
| 927 | *
|
|---|
| 928 | * @returns K_TRUE on success, K_FALSE on error.
|
|---|
| 929 | * @param pCache The cache.
|
|---|
| 930 | * @param pDir The directory.
|
|---|
| 931 | * @param penmError Where to store K_FALSE explanation.
|
|---|
| 932 | */
|
|---|
| 933 | static KBOOL kFsCachePopuplateOrRefreshDir(PKFSCACHE pCache, PKFSDIR pDir, KFSLOOKUPERROR *penmError)
|
|---|
| 934 | {
|
|---|
| 935 | KBOOL fRefreshing = K_FALSE;
|
|---|
| 936 | /** @todo will have to make this more flexible wrt information classes since
|
|---|
| 937 | * older windows versions (XP, w2K) might not correctly support the
|
|---|
| 938 | * ones with file ID on all file systems. */
|
|---|
| 939 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 940 | MY_FILE_INFORMATION_CLASS const enmInfoClassWithId = MyFileIdBothDirectoryInformation;
|
|---|
| 941 | MY_FILE_INFORMATION_CLASS enmInfoClass = MyFileIdBothDirectoryInformation;
|
|---|
| 942 | #else
|
|---|
| 943 | MY_FILE_INFORMATION_CLASS const enmInfoClassWithId = MyFileIdFullDirectoryInformation;
|
|---|
| 944 | MY_FILE_INFORMATION_CLASS enmInfoClass = MyFileIdFullDirectoryInformation;
|
|---|
| 945 | #endif
|
|---|
| 946 | MY_NTSTATUS rcNt;
|
|---|
| 947 | MY_IO_STATUS_BLOCK Ios;
|
|---|
| 948 | union
|
|---|
| 949 | {
|
|---|
| 950 | /* Include the structures for better alignment. */
|
|---|
| 951 | MY_FILE_ID_BOTH_DIR_INFORMATION WithId;
|
|---|
| 952 | MY_FILE_ID_FULL_DIR_INFORMATION NoId;
|
|---|
| 953 | /* Buffer padding. We're using a 56KB buffer here to avoid size troubles with CIFS and such. */
|
|---|
| 954 | KU8 abBuf[56*1024];
|
|---|
| 955 | } uBuf;
|
|---|
| 956 |
|
|---|
| 957 | /*
|
|---|
| 958 | * Open the directory.
|
|---|
| 959 | */
|
|---|
| 960 | if (pDir->hDir == INVALID_HANDLE_VALUE)
|
|---|
| 961 | {
|
|---|
| 962 | MY_OBJECT_ATTRIBUTES ObjAttr;
|
|---|
| 963 | MY_UNICODE_STRING UniStr;
|
|---|
| 964 |
|
|---|
| 965 | kHlpAssert(!pDir->fPopulated);
|
|---|
| 966 |
|
|---|
| 967 | Ios.Information = -1;
|
|---|
| 968 | Ios.u.Status = -1;
|
|---|
| 969 |
|
|---|
| 970 | UniStr.Buffer = (wchar_t *)pDir->Obj.pwszName;
|
|---|
| 971 | UniStr.Length = (USHORT)(pDir->Obj.cwcName * sizeof(wchar_t));
|
|---|
| 972 | UniStr.MaximumLength = UniStr.Length + sizeof(wchar_t);
|
|---|
| 973 |
|
|---|
| 974 | kHlpAssertStmtReturn(pDir->Obj.pParent, *penmError = KFSLOOKUPERROR_INTERNAL_ERROR, K_FALSE);
|
|---|
| 975 | kHlpAssertStmtReturn(pDir->Obj.pParent->hDir != INVALID_HANDLE_VALUE, *penmError = KFSLOOKUPERROR_INTERNAL_ERROR, K_FALSE);
|
|---|
| 976 | MyInitializeObjectAttributes(&ObjAttr, &UniStr, OBJ_CASE_INSENSITIVE, pDir->Obj.pParent->hDir, NULL /*pSecAttr*/);
|
|---|
| 977 |
|
|---|
| 978 | /** @todo FILE_OPEN_REPARSE_POINT? */
|
|---|
| 979 | rcNt = g_pfnNtCreateFile(&pDir->hDir,
|
|---|
| 980 | FILE_READ_DATA | FILE_LIST_DIRECTORY | FILE_READ_ATTRIBUTES | SYNCHRONIZE,
|
|---|
| 981 | &ObjAttr,
|
|---|
| 982 | &Ios,
|
|---|
| 983 | NULL, /*cbFileInitialAlloc */
|
|---|
| 984 | FILE_ATTRIBUTE_NORMAL,
|
|---|
| 985 | FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
|
|---|
| 986 | FILE_OPEN,
|
|---|
| 987 | FILE_DIRECTORY_FILE | FILE_OPEN_FOR_BACKUP_INTENT | FILE_SYNCHRONOUS_IO_NONALERT,
|
|---|
| 988 | NULL, /*pEaBuffer*/
|
|---|
| 989 | 0); /*cbEaBuffer*/
|
|---|
| 990 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 991 | { /* likely */ }
|
|---|
| 992 | else
|
|---|
| 993 | {
|
|---|
| 994 | pDir->hDir = INVALID_HANDLE_VALUE;
|
|---|
| 995 | *penmError = KFSLOOKUPERROR_DIR_OPEN_ERROR;
|
|---|
| 996 | return K_FALSE;
|
|---|
| 997 | }
|
|---|
| 998 | }
|
|---|
| 999 | else if (pDir->fPopulated)
|
|---|
| 1000 | {
|
|---|
| 1001 | /** @todo refreshing directories. */
|
|---|
| 1002 | __debugbreak();
|
|---|
| 1003 | fRefreshing = K_TRUE;
|
|---|
| 1004 | }
|
|---|
| 1005 |
|
|---|
| 1006 |
|
|---|
| 1007 | /*
|
|---|
| 1008 | * Enumerate the directory content.
|
|---|
| 1009 | */
|
|---|
| 1010 | Ios.Information = -1;
|
|---|
| 1011 | Ios.u.Status = -1;
|
|---|
| 1012 | rcNt = g_pfnNtQueryDirectoryFile(pDir->hDir,
|
|---|
| 1013 | NULL, /* hEvent */
|
|---|
| 1014 | NULL, /* pfnApcComplete */
|
|---|
| 1015 | NULL, /* pvApcCompleteCtx */
|
|---|
| 1016 | &Ios,
|
|---|
| 1017 | &uBuf,
|
|---|
| 1018 | sizeof(uBuf),
|
|---|
| 1019 | enmInfoClass,
|
|---|
| 1020 | FALSE, /* fReturnSingleEntry */
|
|---|
| 1021 | NULL, /* Filter / restart pos. */
|
|---|
| 1022 | TRUE); /* fRestartScan */
|
|---|
| 1023 | while (MY_NT_SUCCESS(rcNt))
|
|---|
| 1024 | {
|
|---|
| 1025 | /*
|
|---|
| 1026 | * Process the entries in the buffer.
|
|---|
| 1027 | */
|
|---|
| 1028 | KSIZE offBuf = 0;
|
|---|
| 1029 | for (;;)
|
|---|
| 1030 | {
|
|---|
| 1031 | union
|
|---|
| 1032 | {
|
|---|
| 1033 | KU8 *pb;
|
|---|
| 1034 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1035 | MY_FILE_ID_BOTH_DIR_INFORMATION *pWithId;
|
|---|
| 1036 | MY_FILE_BOTH_DIR_INFORMATION *pNoId;
|
|---|
| 1037 | #else
|
|---|
| 1038 | MY_FILE_ID_FULL_DIR_INFORMATION *pWithId;
|
|---|
| 1039 | MY_FILE_FULL_DIR_INFORMATION *pNoId;
|
|---|
| 1040 | #endif
|
|---|
| 1041 | } uPtr;
|
|---|
| 1042 | PKFSOBJ pCur;
|
|---|
| 1043 | KU32 offNext;
|
|---|
| 1044 | KU32 cbMinCur;
|
|---|
| 1045 | wchar_t *pwszFilename;
|
|---|
| 1046 |
|
|---|
| 1047 | /* ASSUME only the FileName member differs between the two structures. */
|
|---|
| 1048 | uPtr.pb = &uBuf.abBuf[offBuf];
|
|---|
| 1049 | if (enmInfoClass == enmInfoClassWithId)
|
|---|
| 1050 | {
|
|---|
| 1051 | pwszFilename = &uPtr.pWithId->FileName[0];
|
|---|
| 1052 | cbMinCur = (KU32)((uintptr_t)&uPtr.pWithId->FileName[0] - (uintptr_t)uPtr.pWithId);
|
|---|
| 1053 | cbMinCur += uPtr.pNoId->FileNameLength;
|
|---|
| 1054 | }
|
|---|
| 1055 | else
|
|---|
| 1056 | {
|
|---|
| 1057 | pwszFilename = &uPtr.pNoId->FileName[0];
|
|---|
| 1058 | cbMinCur = (KU32)((uintptr_t)&uPtr.pNoId->FileName[0] - (uintptr_t)uPtr.pNoId);
|
|---|
| 1059 | cbMinCur += uPtr.pNoId->FileNameLength;
|
|---|
| 1060 | }
|
|---|
| 1061 |
|
|---|
| 1062 | /*
|
|---|
| 1063 | * Create the entry (not linked yet).
|
|---|
| 1064 | */
|
|---|
| 1065 | pCur = kFsCacheCreateObjectW(pCache, pDir, pwszFilename, uPtr.pNoId->FileNameLength / sizeof(wchar_t),
|
|---|
| 1066 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1067 | uPtr.pNoId->ShortName, uPtr.pNoId->ShortNameLength / sizeof(wchar_t),
|
|---|
| 1068 | #endif
|
|---|
| 1069 | uPtr.pNoId->FileAttributes & FILE_ATTRIBUTE_DIRECTORY ? KFSOBJ_TYPE_DIR
|
|---|
| 1070 | : uPtr.pNoId->FileAttributes & (FILE_ATTRIBUTE_DEVICE | FILE_ATTRIBUTE_REPARSE_POINT)
|
|---|
| 1071 | ? KFSOBJ_TYPE_OTHER : KFSOBJ_TYPE_FILE,
|
|---|
| 1072 | penmError);
|
|---|
| 1073 | if (!pCur)
|
|---|
| 1074 | return K_FALSE;
|
|---|
| 1075 | kHlpAssert(pCur->cRefs == 1);
|
|---|
| 1076 |
|
|---|
| 1077 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1078 | if (enmInfoClass == enmInfoClassWithId)
|
|---|
| 1079 | birdStatFillFromFileIdBothDirInfo(&pCur->Stats, uPtr.pWithId, pCur->pszName);
|
|---|
| 1080 | else
|
|---|
| 1081 | birdStatFillFromFileBothDirInfo(&pCur->Stats, uPtr.pNoId, pCur->pszName);
|
|---|
| 1082 | #else
|
|---|
| 1083 | if (enmInfoClass == enmInfoClassWithId)
|
|---|
| 1084 | birdStatFillFromFileIdFullDirInfo(&pCur->Stats, uPtr.pWithId, pCur->pszName);
|
|---|
| 1085 | else
|
|---|
| 1086 | birdStatFillFromFileFullDirInfo(&pCur->Stats, uPtr.pNoId, pCur->pszName);
|
|---|
| 1087 | #endif
|
|---|
| 1088 | pCur->Stats.st_dev = pDir->uDevNo;
|
|---|
| 1089 |
|
|---|
| 1090 | /*
|
|---|
| 1091 | * If we're updating we have to check the data.
|
|---|
| 1092 | */
|
|---|
| 1093 | if (fRefreshing)
|
|---|
| 1094 | {
|
|---|
| 1095 | __debugbreak();
|
|---|
| 1096 | }
|
|---|
| 1097 |
|
|---|
| 1098 | /*
|
|---|
| 1099 | * If we've still got pCur, add it to the directory.
|
|---|
| 1100 | */
|
|---|
| 1101 | if (pCur)
|
|---|
| 1102 | {
|
|---|
| 1103 | KBOOL fRc = kFsCacheDirAddChild(pCache, pDir, pCur, penmError);
|
|---|
| 1104 | kFsCacheObjRelease(pCache, pCur);
|
|---|
| 1105 | if (fRc)
|
|---|
| 1106 | { /* likely */ }
|
|---|
| 1107 | else
|
|---|
| 1108 | return K_FALSE;
|
|---|
| 1109 | }
|
|---|
| 1110 |
|
|---|
| 1111 | /*
|
|---|
| 1112 | * Advance.
|
|---|
| 1113 | */
|
|---|
| 1114 | offNext = uPtr.pNoId->NextEntryOffset;
|
|---|
| 1115 | if ( offNext >= cbMinCur
|
|---|
| 1116 | && offNext < sizeof(uBuf))
|
|---|
| 1117 | offBuf += offNext;
|
|---|
| 1118 | else
|
|---|
| 1119 | break;
|
|---|
| 1120 | }
|
|---|
| 1121 |
|
|---|
| 1122 | /*
|
|---|
| 1123 | * Read the next chunk.
|
|---|
| 1124 | */
|
|---|
| 1125 | rcNt = g_pfnNtQueryDirectoryFile(pDir->hDir,
|
|---|
| 1126 | NULL, /* hEvent */
|
|---|
| 1127 | NULL, /* pfnApcComplete */
|
|---|
| 1128 | NULL, /* pvApcCompleteCtx */
|
|---|
| 1129 | &Ios,
|
|---|
| 1130 | &uBuf,
|
|---|
| 1131 | sizeof(uBuf),
|
|---|
| 1132 | enmInfoClass,
|
|---|
| 1133 | FALSE, /* fReturnSingleEntry */
|
|---|
| 1134 | NULL, /* Filter / restart pos. */
|
|---|
| 1135 | FALSE); /* fRestartScan */
|
|---|
| 1136 | }
|
|---|
| 1137 |
|
|---|
| 1138 | if (rcNt == MY_STATUS_NO_MORE_FILES)
|
|---|
| 1139 | return K_TRUE;
|
|---|
| 1140 | kHlpAssertMsgFailed(("%#x\n", rcNt));
|
|---|
| 1141 | *penmError = KFSLOOKUPERROR_DIR_READ_ERROR;
|
|---|
| 1142 | return K_TRUE;
|
|---|
| 1143 | }
|
|---|
| 1144 |
|
|---|
| 1145 |
|
|---|
| 1146 | static KBOOL kFsCacheRefreshMissing(PKFSCACHE pCache, PKFSOBJ pMissing, KFSLOOKUPERROR *penmError)
|
|---|
| 1147 | {
|
|---|
| 1148 | return K_TRUE;
|
|---|
| 1149 | }
|
|---|
| 1150 |
|
|---|
| 1151 |
|
|---|
| 1152 | static KBOOL kFsCacheRefreshMissingIntermediateDir(PKFSCACHE pCache, PKFSOBJ pMissing, KFSLOOKUPERROR *penmError)
|
|---|
| 1153 | {
|
|---|
| 1154 | return K_TRUE;
|
|---|
| 1155 | }
|
|---|
| 1156 |
|
|---|
| 1157 |
|
|---|
| 1158 | static KBOOL kFsCacheRefreshObj(PKFSCACHE pCache, PKFSOBJ pObj, KFSLOOKUPERROR *penmError)
|
|---|
| 1159 | {
|
|---|
| 1160 | return K_FALSE;
|
|---|
| 1161 | }
|
|---|
| 1162 |
|
|---|
| 1163 |
|
|---|
| 1164 |
|
|---|
| 1165 | /**
|
|---|
| 1166 | * Looks up a drive letter.
|
|---|
| 1167 | *
|
|---|
| 1168 | * Will enter the drive if necessary.
|
|---|
| 1169 | *
|
|---|
| 1170 | * @returns Pointer to the root directory of the drive or an update-to-date
|
|---|
| 1171 | * missing node.
|
|---|
| 1172 | * @param pCache The cache.
|
|---|
| 1173 | * @param chLetter The uppercased drive letter.
|
|---|
| 1174 | * @param penmError Where to return details as to why the lookup
|
|---|
| 1175 | * failed.
|
|---|
| 1176 | */
|
|---|
| 1177 | static PKFSOBJ kFswCacheLookupDrive(PKFSCACHE pCache, char chLetter, KFSLOOKUPERROR *penmError)
|
|---|
| 1178 | {
|
|---|
| 1179 | KU32 const uHash = chLetter - 'A';
|
|---|
| 1180 | KU32 cLeft;
|
|---|
| 1181 | PKFSOBJ *ppCur;
|
|---|
| 1182 |
|
|---|
| 1183 | MY_UNICODE_STRING NtPath;
|
|---|
| 1184 | wchar_t wszTmp[8];
|
|---|
| 1185 | MY_NTSTATUS rcNt;
|
|---|
| 1186 | char szTmp[4];
|
|---|
| 1187 |
|
|---|
| 1188 | /*
|
|---|
| 1189 | * Custom drive letter hashing.
|
|---|
| 1190 | */
|
|---|
| 1191 | if (pCache->RootDir.paHashTab)
|
|---|
| 1192 | {
|
|---|
| 1193 | /** @todo PKFSOBJHASH pHash = */
|
|---|
| 1194 | }
|
|---|
| 1195 |
|
|---|
| 1196 | /*
|
|---|
| 1197 | * Special cased lookup.
|
|---|
| 1198 | */
|
|---|
| 1199 | cLeft = pCache->RootDir.cChildren;
|
|---|
| 1200 | ppCur = pCache->RootDir.papChildren;
|
|---|
| 1201 | while (cLeft-- > 0)
|
|---|
| 1202 | {
|
|---|
| 1203 | PKFSOBJ pCur = *ppCur++;
|
|---|
| 1204 | if ( pCur->cchName == 2
|
|---|
| 1205 | && pCur->pszName[0] == chLetter
|
|---|
| 1206 | && pCur->pszName[1] == ':')
|
|---|
| 1207 | {
|
|---|
| 1208 | if (pCur->bObjType == KFSOBJ_TYPE_DIR)
|
|---|
| 1209 | return pCur;
|
|---|
| 1210 | kHlpAssert(pCur->bObjType == KFSOBJ_TYPE_MISSING);
|
|---|
| 1211 | if (kFsCacheRefreshMissingIntermediateDir(pCache, pCur, penmError))
|
|---|
| 1212 | return pCur;
|
|---|
| 1213 | return NULL;
|
|---|
| 1214 | }
|
|---|
| 1215 | }
|
|---|
| 1216 |
|
|---|
| 1217 | /*
|
|---|
| 1218 | * Need to add it. We always keep the drive letters open for the benefit
|
|---|
| 1219 | * of kFsCachePopuplateOrRefreshDir and others.
|
|---|
| 1220 | */
|
|---|
| 1221 | wszTmp[0] = szTmp[0] = chLetter;
|
|---|
| 1222 | wszTmp[1] = szTmp[1] = ':';
|
|---|
| 1223 | wszTmp[2] = szTmp[2] = '\\';
|
|---|
| 1224 | wszTmp[3] = '.';
|
|---|
| 1225 | wszTmp[4] = '\0';
|
|---|
| 1226 | szTmp[2] = '\0';
|
|---|
| 1227 |
|
|---|
| 1228 | NtPath.Buffer = NULL;
|
|---|
| 1229 | NtPath.Length = 0;
|
|---|
| 1230 | NtPath.MaximumLength = 0;
|
|---|
| 1231 | if (g_pfnRtlDosPathNameToNtPathName_U(wszTmp, &NtPath, NULL, NULL))
|
|---|
| 1232 | {
|
|---|
| 1233 | HANDLE hDir;
|
|---|
| 1234 | rcNt = birdOpenFileUniStr(&NtPath,
|
|---|
| 1235 | FILE_READ_DATA | FILE_LIST_DIRECTORY | FILE_READ_ATTRIBUTES | SYNCHRONIZE,
|
|---|
| 1236 | FILE_ATTRIBUTE_NORMAL,
|
|---|
| 1237 | FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
|
|---|
| 1238 | FILE_OPEN,
|
|---|
| 1239 | FILE_DIRECTORY_FILE | FILE_OPEN_FOR_BACKUP_INTENT | FILE_SYNCHRONOUS_IO_NONALERT,
|
|---|
| 1240 | OBJ_CASE_INSENSITIVE,
|
|---|
| 1241 | &hDir);
|
|---|
| 1242 | birdFreeNtPath(&NtPath);
|
|---|
| 1243 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1244 | {
|
|---|
| 1245 | PKFSDIR pDir = (PKFSDIR)kFsCacheCreateObject(pCache, &pCache->RootDir, szTmp, 2, wszTmp, 2,
|
|---|
| 1246 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1247 | NULL, 0, NULL, 0,
|
|---|
| 1248 | #endif
|
|---|
| 1249 | KFSOBJ_TYPE_DIR, penmError);
|
|---|
| 1250 | if (pDir)
|
|---|
| 1251 | {
|
|---|
| 1252 | /*
|
|---|
| 1253 | * We need a little bit of extra info for a drive root. These things are typically
|
|---|
| 1254 | * inherited by subdirectories down the tree, so, we do it all here for till that changes.
|
|---|
| 1255 | */
|
|---|
| 1256 | union
|
|---|
| 1257 | {
|
|---|
| 1258 | MY_FILE_FS_VOLUME_INFORMATION VolInfo;
|
|---|
| 1259 | MY_FILE_FS_ATTRIBUTE_INFORMATION FsAttrInfo;
|
|---|
| 1260 | char abPadding[sizeof(MY_FILE_FS_VOLUME_INFORMATION) + 512];
|
|---|
| 1261 | } uBuf;
|
|---|
| 1262 | MY_IO_STATUS_BLOCK Ios;
|
|---|
| 1263 | KBOOL fRc;
|
|---|
| 1264 |
|
|---|
| 1265 | kHlpAssert(pDir->hDir == INVALID_HANDLE_VALUE);
|
|---|
| 1266 | pDir->hDir = hDir;
|
|---|
| 1267 |
|
|---|
| 1268 | /* Get the device number. */
|
|---|
| 1269 | rcNt = birdQueryVolumeDeviceNumber(hDir, &uBuf.VolInfo, sizeof(uBuf), &pDir->uDevNo);
|
|---|
| 1270 | kHlpAssertMsg(MY_NT_SUCCESS(rcNt), ("%#x\n", rcNt));
|
|---|
| 1271 |
|
|---|
| 1272 | /* Get the file system. */
|
|---|
| 1273 | pDir->Obj.fFlags &= ~(KFSOBJ_F_NTFS | KFSOBJ_F_WORKING_DIR_MTIME);
|
|---|
| 1274 | Ios.Information = -1;
|
|---|
| 1275 | Ios.u.Status = -1;
|
|---|
| 1276 | rcNt = g_pfnNtQueryVolumeInformationFile(hDir, &Ios, &uBuf.FsAttrInfo, sizeof(uBuf),
|
|---|
| 1277 | MyFileFsAttributeInformation);
|
|---|
| 1278 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1279 | rcNt = Ios.u.Status;
|
|---|
| 1280 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1281 | {
|
|---|
| 1282 | if ( uBuf.FsAttrInfo.FileSystemName[0] == 'N'
|
|---|
| 1283 | && uBuf.FsAttrInfo.FileSystemName[1] == 'T'
|
|---|
| 1284 | && uBuf.FsAttrInfo.FileSystemName[2] == 'F'
|
|---|
| 1285 | && uBuf.FsAttrInfo.FileSystemName[3] == 'S'
|
|---|
| 1286 | && uBuf.FsAttrInfo.FileSystemName[4] == '\0')
|
|---|
| 1287 | {
|
|---|
| 1288 | DWORD dwDriveType = GetDriveTypeW(wszTmp);
|
|---|
| 1289 | if ( dwDriveType == DRIVE_FIXED
|
|---|
| 1290 | || dwDriveType == DRIVE_RAMDISK)
|
|---|
| 1291 | pDir->Obj.fFlags |= KFSOBJ_F_NTFS | KFSOBJ_F_WORKING_DIR_MTIME;
|
|---|
| 1292 | }
|
|---|
| 1293 | }
|
|---|
| 1294 |
|
|---|
| 1295 | /*
|
|---|
| 1296 | * Link the new drive letter into the root dir.
|
|---|
| 1297 | */
|
|---|
| 1298 | fRc = kFsCacheDirAddChild(pCache, &pCache->RootDir, &pDir->Obj, penmError);
|
|---|
| 1299 | kFsCacheObjRelease(pCache, &pDir->Obj);
|
|---|
| 1300 | return fRc ? &pDir->Obj : NULL;
|
|---|
| 1301 | }
|
|---|
| 1302 |
|
|---|
| 1303 | g_pfnNtClose(hDir);
|
|---|
| 1304 | return NULL;
|
|---|
| 1305 | }
|
|---|
| 1306 |
|
|---|
| 1307 | /* Assume it doesn't exist if this happens... This may be a little to
|
|---|
| 1308 | restrictive wrt status code checks. */
|
|---|
| 1309 | kHlpAssertMsgStmtReturn( rcNt == MY_STATUS_OBJECT_NAME_NOT_FOUND
|
|---|
| 1310 | || rcNt == MY_STATUS_OBJECT_PATH_NOT_FOUND
|
|---|
| 1311 | || rcNt == MY_STATUS_OBJECT_PATH_INVALID
|
|---|
| 1312 | || rcNt == MY_STATUS_OBJECT_PATH_SYNTAX_BAD,
|
|---|
| 1313 | ("%#x\n", rcNt),
|
|---|
| 1314 | *penmError = KFSLOOKUPERROR_DIR_OPEN_ERROR,
|
|---|
| 1315 | NULL);
|
|---|
| 1316 | }
|
|---|
| 1317 | else
|
|---|
| 1318 | {
|
|---|
| 1319 | kHlpAssertFailed();
|
|---|
| 1320 | *penmError = KFSLOOKUPERROR_OUT_OF_MEMORY;
|
|---|
| 1321 | return NULL;
|
|---|
| 1322 | }
|
|---|
| 1323 |
|
|---|
| 1324 | /*
|
|---|
| 1325 | * Maybe create a missing entry.
|
|---|
| 1326 | */
|
|---|
| 1327 | if (pCache->fFlags & KFSCACHE_F_MISSING_OBJECTS)
|
|---|
| 1328 | {
|
|---|
| 1329 | PKFSOBJ pMissing = kFsCacheCreateObject(pCache, &pCache->RootDir, szTmp, 2, wszTmp, 2,
|
|---|
| 1330 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1331 | NULL, 0, NULL, 0,
|
|---|
| 1332 | #endif
|
|---|
| 1333 | KFSOBJ_TYPE_MISSING, penmError);
|
|---|
| 1334 | if (pMissing)
|
|---|
| 1335 | {
|
|---|
| 1336 | KBOOL fRc = kFsCacheDirAddChild(pCache, &pCache->RootDir, pMissing, penmError);
|
|---|
| 1337 | kFsCacheObjRelease(pCache, pMissing);
|
|---|
| 1338 | return fRc ? pMissing : NULL;
|
|---|
| 1339 | }
|
|---|
| 1340 | }
|
|---|
| 1341 | else
|
|---|
| 1342 | {
|
|---|
| 1343 | /** @todo this isn't necessary correct for a root spec. */
|
|---|
| 1344 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_FOUND;
|
|---|
| 1345 | }
|
|---|
| 1346 | return NULL;
|
|---|
| 1347 | }
|
|---|
| 1348 |
|
|---|
| 1349 |
|
|---|
| 1350 | /**
|
|---|
| 1351 | * Look up a child node, ANSI version.
|
|---|
| 1352 | *
|
|---|
| 1353 | * @returns Pointer to the child if found, NULL if not.
|
|---|
| 1354 | * @param pCache The cache.
|
|---|
| 1355 | * @param pParent The parent directory to search.
|
|---|
| 1356 | * @param pchName The child name to search for (not terminated).
|
|---|
| 1357 | * @param cchName The length of the child name.
|
|---|
| 1358 | */
|
|---|
| 1359 | static PKFSOBJ kFsCacheFindChildA(PKFSCACHE pCache, PKFSDIR pParent, const char *pchName, KU32 cchName)
|
|---|
| 1360 | {
|
|---|
| 1361 | /* Check for '.' first. */
|
|---|
| 1362 | if (cchName != 1 || *pchName != '.')
|
|---|
| 1363 | {
|
|---|
| 1364 | KU32 cLeft;
|
|---|
| 1365 | PKFSOBJ *ppCur;
|
|---|
| 1366 |
|
|---|
| 1367 | if (pParent->paHashTab != NULL)
|
|---|
| 1368 | {
|
|---|
| 1369 | /** @todo directory hash table lookup. */
|
|---|
| 1370 | }
|
|---|
| 1371 |
|
|---|
| 1372 | /* Linear search. */
|
|---|
| 1373 | cLeft = pParent->cChildren;
|
|---|
| 1374 | ppCur = pParent->papChildren;
|
|---|
| 1375 | while (cLeft-- > 0)
|
|---|
| 1376 | {
|
|---|
| 1377 | PKFSOBJ pCur = *ppCur++;
|
|---|
| 1378 | if ( ( pCur->cchName == cchName
|
|---|
| 1379 | && _mbsnicmp(pCur->pszName, pchName, cchName) == 0)
|
|---|
| 1380 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1381 | || ( pCur->cchShortName == cchName
|
|---|
| 1382 | && pCur->pszShortName != pCur->pszName
|
|---|
| 1383 | && _mbsnicmp(pCur->pszShortName, pchName, cchName) == 0)
|
|---|
| 1384 | #endif
|
|---|
| 1385 | )
|
|---|
| 1386 | return pCur;
|
|---|
| 1387 | }
|
|---|
| 1388 | return NULL;
|
|---|
| 1389 | }
|
|---|
| 1390 | return &pParent->Obj;
|
|---|
| 1391 | }
|
|---|
| 1392 |
|
|---|
| 1393 |
|
|---|
| 1394 | /**
|
|---|
| 1395 | * For use when kFsCacheIAreEqualW hit's something non-trivial.
|
|---|
| 1396 | *
|
|---|
| 1397 | * @returns K_TRUE if equal, K_FALSE if different.
|
|---|
| 1398 | * @param pwcName1 The first string.
|
|---|
| 1399 | * @param pwcName2 The second string.
|
|---|
| 1400 | * @param cwcName The length of the two strings (in wchar_t's).
|
|---|
| 1401 | */
|
|---|
| 1402 | KBOOL kFsCacheIAreEqualSlowW(const wchar_t *pwcName1, const wchar_t *pwcName2, KU16 cwcName)
|
|---|
| 1403 | {
|
|---|
| 1404 | MY_UNICODE_STRING UniStr1 = { cwcName * sizeof(wchar_t), cwcName * sizeof(wchar_t), (wchar_t *)pwcName1 };
|
|---|
| 1405 | MY_UNICODE_STRING UniStr2 = { cwcName * sizeof(wchar_t), cwcName * sizeof(wchar_t), (wchar_t *)pwcName2 };
|
|---|
| 1406 | return g_pfnRtlEqualUnicodeString(&UniStr1, &UniStr2, TRUE /*fCaseInsensitive*/);
|
|---|
| 1407 | }
|
|---|
| 1408 |
|
|---|
| 1409 |
|
|---|
| 1410 | /**
|
|---|
| 1411 | * Compares two UTF-16 strings in a case-insensitive fashion.
|
|---|
| 1412 | *
|
|---|
| 1413 | * You would think we should be using _wscnicmp here instead, however it is
|
|---|
| 1414 | * locale dependent and defaults to ASCII upper/lower handling setlocale hasn't
|
|---|
| 1415 | * been called.
|
|---|
| 1416 | *
|
|---|
| 1417 | * @returns K_TRUE if equal, K_FALSE if different.
|
|---|
| 1418 | * @param pwcName1 The first string.
|
|---|
| 1419 | * @param pwcName2 The second string.
|
|---|
| 1420 | * @param cwcName The length of the two strings (in wchar_t's).
|
|---|
| 1421 | */
|
|---|
| 1422 | K_INLINE KBOOL kFsCacheIAreEqualW(const wchar_t *pwcName1, const wchar_t *pwcName2, KU32 cwcName)
|
|---|
| 1423 | {
|
|---|
| 1424 | while (cwcName > 0)
|
|---|
| 1425 | {
|
|---|
| 1426 | wchar_t wc1 = *pwcName1;
|
|---|
| 1427 | wchar_t wc2 = *pwcName2;
|
|---|
| 1428 | if (wc1 == wc2)
|
|---|
| 1429 | { /* not unlikely */ }
|
|---|
| 1430 | else if ( (KU16)wc1 < (KU16)0xc0 /* U+00C0 is the first upper/lower letter after 'z'. */
|
|---|
| 1431 | && (KU16)wc2 < (KU16)0xc0)
|
|---|
| 1432 | {
|
|---|
| 1433 | /* ASCII upper case. */
|
|---|
| 1434 | if ((KU16)wc1 - (KU16)0x61 < (KU16)26)
|
|---|
| 1435 | wc1 &= ~(wchar_t)0x20;
|
|---|
| 1436 | if ((KU16)wc2 - (KU16)0x61 < (KU16)26)
|
|---|
| 1437 | wc2 &= ~(wchar_t)0x20;
|
|---|
| 1438 | if (wc1 != wc2)
|
|---|
| 1439 | return K_FALSE;
|
|---|
| 1440 | }
|
|---|
| 1441 | else
|
|---|
| 1442 | return kFsCacheIAreEqualSlowW(pwcName1, pwcName2, (KU16)cwcName);
|
|---|
| 1443 |
|
|---|
| 1444 | pwcName2++;
|
|---|
| 1445 | pwcName1++;
|
|---|
| 1446 | cwcName--;
|
|---|
| 1447 | }
|
|---|
| 1448 |
|
|---|
| 1449 | return K_TRUE;
|
|---|
| 1450 | }
|
|---|
| 1451 |
|
|---|
| 1452 |
|
|---|
| 1453 | /**
|
|---|
| 1454 | * Look up a child node, UTF-16 version.
|
|---|
| 1455 | *
|
|---|
| 1456 | * @returns Pointer to the child if found, NULL if not.
|
|---|
| 1457 | * @param pCache The cache.
|
|---|
| 1458 | * @param pParent The parent directory to search.
|
|---|
| 1459 | * @param pwcName The child name to search for (not terminated).
|
|---|
| 1460 | * @param cwcName The length of the child name (in wchar_t's).
|
|---|
| 1461 | */
|
|---|
| 1462 | static PKFSOBJ kFsCacheFindChildW(PKFSCACHE pCache, PKFSDIR pParent, const wchar_t *pwcName, KU32 cwcName)
|
|---|
| 1463 | {
|
|---|
| 1464 | /* Check for '.' first. */
|
|---|
| 1465 | if (cwcName != 1 || *pwcName != '.')
|
|---|
| 1466 | {
|
|---|
| 1467 | KU32 cLeft;
|
|---|
| 1468 | PKFSOBJ *ppCur;
|
|---|
| 1469 |
|
|---|
| 1470 | if (pParent->paHashTab != NULL)
|
|---|
| 1471 | {
|
|---|
| 1472 | /** @todo directory hash table lookup. */
|
|---|
| 1473 | }
|
|---|
| 1474 |
|
|---|
| 1475 | /* Linear search. */
|
|---|
| 1476 | cLeft = pParent->cChildren;
|
|---|
| 1477 | ppCur = pParent->papChildren;
|
|---|
| 1478 | while (cLeft-- > 0)
|
|---|
| 1479 | {
|
|---|
| 1480 | PKFSOBJ pCur = *ppCur++;
|
|---|
| 1481 | if ( ( pCur->cwcName == cwcName
|
|---|
| 1482 | && kFsCacheIAreEqualW(pCur->pwszName, pwcName, cwcName))
|
|---|
| 1483 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1484 | || ( pCur->cwcShortName == cwcName
|
|---|
| 1485 | && pCur->pwszShortName != pCur->pwszName
|
|---|
| 1486 | && kFsCacheIAreEqualW(pCur->pwszShortName, pwcName, cwcName))
|
|---|
| 1487 | #endif
|
|---|
| 1488 | )
|
|---|
| 1489 | return pCur;
|
|---|
| 1490 | }
|
|---|
| 1491 | return NULL;
|
|---|
| 1492 | }
|
|---|
| 1493 | return &pParent->Obj;
|
|---|
| 1494 | }
|
|---|
| 1495 |
|
|---|
| 1496 |
|
|---|
| 1497 | /**
|
|---|
| 1498 | * Looks up a UNC share, ANSI version.
|
|---|
| 1499 | *
|
|---|
| 1500 | * We keep both the server and share in the root directory entry. This means we
|
|---|
| 1501 | * have to clean up the entry name before we can insert it.
|
|---|
| 1502 | *
|
|---|
| 1503 | * @returns Pointer to the share root directory or an update-to-date missing
|
|---|
| 1504 | * node.
|
|---|
| 1505 | * @param pCache The cache.
|
|---|
| 1506 | * @param pszPath The path.
|
|---|
| 1507 | * @param poff Where to return the root dire.
|
|---|
| 1508 | * @param penmError Where to return details as to why the lookup
|
|---|
| 1509 | * failed.
|
|---|
| 1510 | */
|
|---|
| 1511 | static PKFSOBJ kFswCacheLookupUncShareA(PKFSCACHE pCache, const char *pszPath, KU32 *poff, KFSLOOKUPERROR *penmError)
|
|---|
| 1512 | {
|
|---|
| 1513 | #if 0 /* later */
|
|---|
| 1514 | KU32 offStartServer;
|
|---|
| 1515 | KU32 offEndServer;
|
|---|
| 1516 | KU32 offStartShare;
|
|---|
| 1517 |
|
|---|
| 1518 | KU32 offEnd = 2;
|
|---|
| 1519 | while (IS_SLASH(pszPath[offEnd]))
|
|---|
| 1520 | offEnd++;
|
|---|
| 1521 |
|
|---|
| 1522 | offStartServer = offEnd;
|
|---|
| 1523 | while ( (ch = pszPath[offEnd]) != '\0'
|
|---|
| 1524 | && !IS_SLASH(ch))
|
|---|
| 1525 | offEnd++;
|
|---|
| 1526 | offEndServer = offEnd;
|
|---|
| 1527 |
|
|---|
| 1528 | if (ch != '\0')
|
|---|
| 1529 | { /* likely */ }
|
|---|
| 1530 | else
|
|---|
| 1531 | {
|
|---|
| 1532 | *penmError = KFSLOOKUPERROR_NOT_FOUND;
|
|---|
| 1533 | return NULL;
|
|---|
| 1534 | }
|
|---|
| 1535 |
|
|---|
| 1536 | while (IS_SLASH(pszPath[offEnd]))
|
|---|
| 1537 | offEnd++;
|
|---|
| 1538 | offStartServer = offEnd;
|
|---|
| 1539 | while ( (ch = pszPath[offEnd]) != '\0'
|
|---|
| 1540 | && !IS_SLASH(ch))
|
|---|
| 1541 | offEnd++;
|
|---|
| 1542 | #endif
|
|---|
| 1543 | *penmError = KFSLOOKUPERROR_UNSUPPORTED;
|
|---|
| 1544 | return NULL;
|
|---|
| 1545 | }
|
|---|
| 1546 |
|
|---|
| 1547 |
|
|---|
| 1548 | /**
|
|---|
| 1549 | * Looks up a UNC share, UTF-16 version.
|
|---|
| 1550 | *
|
|---|
| 1551 | * We keep both the server and share in the root directory entry. This means we
|
|---|
| 1552 | * have to clean up the entry name before we can insert it.
|
|---|
| 1553 | *
|
|---|
| 1554 | * @returns Pointer to the share root directory or an update-to-date missing
|
|---|
| 1555 | * node.
|
|---|
| 1556 | * @param pCache The cache.
|
|---|
| 1557 | * @param pwszPath The path.
|
|---|
| 1558 | * @param poff Where to return the root dire.
|
|---|
| 1559 | * @param penmError Where to return details as to why the lookup
|
|---|
| 1560 | * failed.
|
|---|
| 1561 | */
|
|---|
| 1562 | static PKFSOBJ kFswCacheLookupUncShareW(PKFSCACHE pCache, const wchar_t *pwszPath, KU32 *poff, KFSLOOKUPERROR *penmError)
|
|---|
| 1563 | {
|
|---|
| 1564 | #if 0 /* later */
|
|---|
| 1565 | KU32 offStartServer;
|
|---|
| 1566 | KU32 offEndServer;
|
|---|
| 1567 | KU32 offStartShare;
|
|---|
| 1568 |
|
|---|
| 1569 | KU32 offEnd = 2;
|
|---|
| 1570 | while (IS_SLASH(pwszPath[offEnd]))
|
|---|
| 1571 | offEnd++;
|
|---|
| 1572 |
|
|---|
| 1573 | offStartServer = offEnd;
|
|---|
| 1574 | while ( (ch = pwszPath[offEnd]) != '\0'
|
|---|
| 1575 | && !IS_SLASH(ch))
|
|---|
| 1576 | offEnd++;
|
|---|
| 1577 | offEndServer = offEnd;
|
|---|
| 1578 |
|
|---|
| 1579 | if (ch != '\0')
|
|---|
| 1580 | { /* likely */ }
|
|---|
| 1581 | else
|
|---|
| 1582 | {
|
|---|
| 1583 | *penmError = KFSLOOKUPERROR_NOT_FOUND;
|
|---|
| 1584 | return NULL;
|
|---|
| 1585 | }
|
|---|
| 1586 |
|
|---|
| 1587 | while (IS_SLASH(pwszPath[offEnd]))
|
|---|
| 1588 | offEnd++;
|
|---|
| 1589 | offStartServer = offEnd;
|
|---|
| 1590 | while ( (ch = pwszPath[offEnd]) != '\0'
|
|---|
| 1591 | && !IS_SLASH(ch))
|
|---|
| 1592 | offEnd++;
|
|---|
| 1593 | #endif
|
|---|
| 1594 | *penmError = KFSLOOKUPERROR_UNSUPPORTED;
|
|---|
| 1595 | return NULL;
|
|---|
| 1596 | }
|
|---|
| 1597 |
|
|---|
| 1598 |
|
|---|
| 1599 | /**
|
|---|
| 1600 | * Walk the file system tree for the given absolute path, entering it into the
|
|---|
| 1601 | * hash table.
|
|---|
| 1602 | *
|
|---|
| 1603 | * This will create any missing nodes while walking.
|
|---|
| 1604 | *
|
|---|
| 1605 | * The caller will have to do the path hash table insertion of the result.
|
|---|
| 1606 | *
|
|---|
| 1607 | * @returns Pointer to the tree node corresponding to @a pszPath.
|
|---|
| 1608 | * NULL on lookup failure, see @a penmError for details.
|
|---|
| 1609 | * @param pCache The cache.
|
|---|
| 1610 | * @param pszPath The path to walk.
|
|---|
| 1611 | * @param cchPath The length of the path.
|
|---|
| 1612 | * @param penmError Where to return details as to why the lookup
|
|---|
| 1613 | * failed.
|
|---|
| 1614 | */
|
|---|
| 1615 | static PKFSOBJ kFsCacheLookupAbsoluteA(PKFSCACHE pCache, const char *pszPath, KU32 cchPath, KFSLOOKUPERROR *penmError)
|
|---|
| 1616 | {
|
|---|
| 1617 | PKFSDIR pParent = &pCache->RootDir;
|
|---|
| 1618 | PKFSOBJ pChild;
|
|---|
| 1619 | KU32 off;
|
|---|
| 1620 | KU32 cchSlashes;
|
|---|
| 1621 | KU32 offEnd;
|
|---|
| 1622 |
|
|---|
| 1623 | KFSCACHE_LOG(("kFsCacheLookupAbsoluteA(%s)\n", pszPath));
|
|---|
| 1624 |
|
|---|
| 1625 | /*
|
|---|
| 1626 | * The root "directory" needs special handling, so we keep it outside the
|
|---|
| 1627 | * main search loop. (Special: Cannot enumerate it, UNCs, ++.)
|
|---|
| 1628 | */
|
|---|
| 1629 | cchSlashes = 0;
|
|---|
| 1630 | off = 0;
|
|---|
| 1631 | if ( pszPath[1] == ':'
|
|---|
| 1632 | && IS_ALPHA(pszPath[0]))
|
|---|
| 1633 | {
|
|---|
| 1634 | /* Drive letter. */
|
|---|
| 1635 | offEnd = 2;
|
|---|
| 1636 | kHlpAssert(IS_SLASH(pszPath[2]));
|
|---|
| 1637 | pChild = kFswCacheLookupDrive(pCache, toupper(pszPath[0]), penmError);
|
|---|
| 1638 | }
|
|---|
| 1639 | else if ( IS_SLASH(pszPath[0])
|
|---|
| 1640 | && IS_SLASH(pszPath[1]) )
|
|---|
| 1641 | pChild = kFswCacheLookupUncShareA(pCache, pszPath, &offEnd, penmError);
|
|---|
| 1642 | else
|
|---|
| 1643 | {
|
|---|
| 1644 | *penmError = KFSLOOKUPERROR_UNSUPPORTED;
|
|---|
| 1645 | return NULL;
|
|---|
| 1646 | }
|
|---|
| 1647 | if (pChild)
|
|---|
| 1648 | { /* likely */ }
|
|---|
| 1649 | else
|
|---|
| 1650 | return NULL;
|
|---|
| 1651 |
|
|---|
| 1652 | /* Count slashes trailing the root spec. */
|
|---|
| 1653 | if (offEnd < cchPath)
|
|---|
| 1654 | {
|
|---|
| 1655 | kHlpAssert(IS_SLASH(pszPath[offEnd]));
|
|---|
| 1656 | do
|
|---|
| 1657 | cchSlashes++;
|
|---|
| 1658 | while (IS_SLASH(pszPath[offEnd + cchSlashes]));
|
|---|
| 1659 | }
|
|---|
| 1660 |
|
|---|
| 1661 | /* Done already? */
|
|---|
| 1662 | if (offEnd >= cchPath)
|
|---|
| 1663 | {
|
|---|
| 1664 | if ( pChild->uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 1665 | || pChild->uCacheGen == (pChild->bObjType != KFSOBJ_TYPE_MISSING ? pCache->uGeneration : pCache->uGenerationMissing)
|
|---|
| 1666 | || kFsCacheRefreshObj(pCache, pChild, penmError))
|
|---|
| 1667 | return kFsCacheObjRetainInternal(pChild);
|
|---|
| 1668 | return NULL;
|
|---|
| 1669 | }
|
|---|
| 1670 |
|
|---|
| 1671 | /* Check that we've got a valid result and not a cached negative one. */
|
|---|
| 1672 | if (pChild->bObjType == KFSOBJ_TYPE_DIR)
|
|---|
| 1673 | { /* likely */ }
|
|---|
| 1674 | else
|
|---|
| 1675 | {
|
|---|
| 1676 | kHlpAssert(pChild->bObjType == KFSOBJ_TYPE_MISSING);
|
|---|
| 1677 | kHlpAssert(pChild->uCacheGen == KFSOBJ_CACHE_GEN_IGNORE || pChild->uCacheGen == pCache->uGenerationMissing);
|
|---|
| 1678 | return pChild;
|
|---|
| 1679 | }
|
|---|
| 1680 |
|
|---|
| 1681 | /* Next component. */
|
|---|
| 1682 | pParent = (PKFSDIR)pChild;
|
|---|
| 1683 | off = offEnd + cchSlashes;
|
|---|
| 1684 |
|
|---|
| 1685 |
|
|---|
| 1686 | /*
|
|---|
| 1687 | * Walk loop.
|
|---|
| 1688 | */
|
|---|
| 1689 | for (;;)
|
|---|
| 1690 | {
|
|---|
| 1691 | /*
|
|---|
| 1692 | * Find the end of the component, counting trailing slashes.
|
|---|
| 1693 | */
|
|---|
| 1694 | char ch;
|
|---|
| 1695 | cchSlashes = 0;
|
|---|
| 1696 | offEnd = off + 1;
|
|---|
| 1697 | while ((ch = pszPath[offEnd]) != '\0')
|
|---|
| 1698 | {
|
|---|
| 1699 | if (!IS_SLASH(ch))
|
|---|
| 1700 | offEnd++;
|
|---|
| 1701 | else
|
|---|
| 1702 | {
|
|---|
| 1703 | do
|
|---|
| 1704 | cchSlashes++;
|
|---|
| 1705 | while (IS_SLASH(pszPath[offEnd + cchSlashes]));
|
|---|
| 1706 | break;
|
|---|
| 1707 | }
|
|---|
| 1708 | }
|
|---|
| 1709 |
|
|---|
| 1710 | /*
|
|---|
| 1711 | * Do we need to populate or refresh this directory first?
|
|---|
| 1712 | */
|
|---|
| 1713 | if ( pParent->fPopulated
|
|---|
| 1714 | && ( pParent->Obj.uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 1715 | || pParent->Obj.uCacheGen == pCache->uGeneration) )
|
|---|
| 1716 | { /* likely */ }
|
|---|
| 1717 | else if (kFsCachePopuplateOrRefreshDir(pCache, pParent, penmError))
|
|---|
| 1718 | { /* likely */ }
|
|---|
| 1719 | else
|
|---|
| 1720 | return NULL;
|
|---|
| 1721 |
|
|---|
| 1722 | /*
|
|---|
| 1723 | * Search the current node for the name.
|
|---|
| 1724 | *
|
|---|
| 1725 | * If we don't find it, we may insert a missing node depending on
|
|---|
| 1726 | * the cache configuration.
|
|---|
| 1727 | */
|
|---|
| 1728 | pChild = kFsCacheFindChildA(pCache, pParent, &pszPath[off], offEnd - off);
|
|---|
| 1729 | if (pChild != NULL)
|
|---|
| 1730 | { /* probably likely */ }
|
|---|
| 1731 | else
|
|---|
| 1732 | {
|
|---|
| 1733 | if (pCache->fFlags & KFSCACHE_F_MISSING_OBJECTS)
|
|---|
| 1734 | pChild = kFsCacheCreateMissingA(pCache, pParent, &pszPath[off], offEnd - off, penmError);
|
|---|
| 1735 | if (cchSlashes == 0 || offEnd + cchSlashes >= cchPath)
|
|---|
| 1736 | {
|
|---|
| 1737 | if (pChild)
|
|---|
| 1738 | return pChild;
|
|---|
| 1739 | *penmError = KFSLOOKUPERROR_NOT_FOUND;
|
|---|
| 1740 | }
|
|---|
| 1741 | else
|
|---|
| 1742 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_FOUND;
|
|---|
| 1743 | return NULL;
|
|---|
| 1744 | }
|
|---|
| 1745 |
|
|---|
| 1746 | /* Advance off and check if we're done already. */
|
|---|
| 1747 | off = offEnd + cchSlashes;
|
|---|
| 1748 | if ( cchSlashes == 0
|
|---|
| 1749 | || off >= cchPath)
|
|---|
| 1750 | {
|
|---|
| 1751 | if ( pChild->bObjType != KFSOBJ_TYPE_MISSING
|
|---|
| 1752 | || pChild->uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 1753 | || pChild->uCacheGen == pCache->uGenerationMissing
|
|---|
| 1754 | || kFsCacheRefreshMissing(pCache, pChild, penmError) )
|
|---|
| 1755 | { /* likely */ }
|
|---|
| 1756 | else
|
|---|
| 1757 | return NULL;
|
|---|
| 1758 | return pChild;
|
|---|
| 1759 | }
|
|---|
| 1760 |
|
|---|
| 1761 | /*
|
|---|
| 1762 | * Check that it's a directory. If a missing entry, we may have to
|
|---|
| 1763 | * refresh it and re-examin it.
|
|---|
| 1764 | */
|
|---|
| 1765 | if (pChild->bObjType == KFSOBJ_TYPE_DIR)
|
|---|
| 1766 | pParent = (PKFSDIR)pChild;
|
|---|
| 1767 | else if (pChild->bObjType != KFSOBJ_TYPE_MISSING)
|
|---|
| 1768 | {
|
|---|
| 1769 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_DIR;
|
|---|
| 1770 | return NULL;
|
|---|
| 1771 | }
|
|---|
| 1772 | else if ( pChild->uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 1773 | || pChild->uCacheGen == pCache->uGenerationMissing)
|
|---|
| 1774 | {
|
|---|
| 1775 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_FOUND;
|
|---|
| 1776 | return NULL;
|
|---|
| 1777 | }
|
|---|
| 1778 | else if (kFsCacheRefreshMissingIntermediateDir(pCache, pChild, penmError))
|
|---|
| 1779 | pParent = (PKFSDIR)pChild;
|
|---|
| 1780 | else
|
|---|
| 1781 | return NULL;
|
|---|
| 1782 | }
|
|---|
| 1783 |
|
|---|
| 1784 | return NULL;
|
|---|
| 1785 | }
|
|---|
| 1786 |
|
|---|
| 1787 |
|
|---|
| 1788 | /**
|
|---|
| 1789 | * Walk the file system tree for the given absolute path, UTF-16 version.
|
|---|
| 1790 | *
|
|---|
| 1791 | * This will create any missing nodes while walking.
|
|---|
| 1792 | *
|
|---|
| 1793 | * The caller will have to do the path hash table insertion of the result.
|
|---|
| 1794 | *
|
|---|
| 1795 | * @returns Pointer to the tree node corresponding to @a pszPath.
|
|---|
| 1796 | * NULL on lookup failure, see @a penmError for details.
|
|---|
| 1797 | * @param pCache The cache.
|
|---|
| 1798 | * @param pwszPath The path to walk.
|
|---|
| 1799 | * @param cwcPath The length of the path (in wchar_t's).
|
|---|
| 1800 | * @param penmError Where to return details as to why the lookup
|
|---|
| 1801 | * failed.
|
|---|
| 1802 | */
|
|---|
| 1803 | static PKFSOBJ kFsCacheLookupAbsoluteW(PKFSCACHE pCache, const wchar_t *pwszPath, KU32 cwcPath, KFSLOOKUPERROR *penmError)
|
|---|
| 1804 | {
|
|---|
| 1805 | PKFSDIR pParent = &pCache->RootDir;
|
|---|
| 1806 | PKFSOBJ pChild;
|
|---|
| 1807 | KU32 off;
|
|---|
| 1808 | KU32 cwcSlashes;
|
|---|
| 1809 | KU32 offEnd;
|
|---|
| 1810 |
|
|---|
| 1811 | KFSCACHE_LOG(("kFsCacheLookupAbsoluteW(%ls)\n", pwszPath));
|
|---|
| 1812 |
|
|---|
| 1813 | /*
|
|---|
| 1814 | * The root "directory" needs special handling, so we keep it outside the
|
|---|
| 1815 | * main search loop. (Special: Cannot enumerate it, UNCs, ++.)
|
|---|
| 1816 | */
|
|---|
| 1817 | cwcSlashes = 0;
|
|---|
| 1818 | off = 0;
|
|---|
| 1819 | if ( pwszPath[1] == ':'
|
|---|
| 1820 | && IS_ALPHA(pwszPath[0]))
|
|---|
| 1821 | {
|
|---|
| 1822 | /* Drive letter. */
|
|---|
| 1823 | offEnd = 2;
|
|---|
| 1824 | kHlpAssert(IS_SLASH(pwszPath[2]));
|
|---|
| 1825 | pChild = kFswCacheLookupDrive(pCache, toupper(pwszPath[0]), penmError);
|
|---|
| 1826 | }
|
|---|
| 1827 | else if ( IS_SLASH(pwszPath[0])
|
|---|
| 1828 | && IS_SLASH(pwszPath[1]) )
|
|---|
| 1829 | pChild = kFswCacheLookupUncShareW(pCache, pwszPath, &offEnd, penmError);
|
|---|
| 1830 | else
|
|---|
| 1831 | {
|
|---|
| 1832 | *penmError = KFSLOOKUPERROR_UNSUPPORTED;
|
|---|
| 1833 | return NULL;
|
|---|
| 1834 | }
|
|---|
| 1835 | if (pChild)
|
|---|
| 1836 | { /* likely */ }
|
|---|
| 1837 | else
|
|---|
| 1838 | return NULL;
|
|---|
| 1839 |
|
|---|
| 1840 | /* Count slashes trailing the root spec. */
|
|---|
| 1841 | if (offEnd < cwcPath)
|
|---|
| 1842 | {
|
|---|
| 1843 | kHlpAssert(IS_SLASH(pwszPath[offEnd]));
|
|---|
| 1844 | do
|
|---|
| 1845 | cwcSlashes++;
|
|---|
| 1846 | while (IS_SLASH(pwszPath[offEnd + cwcSlashes]));
|
|---|
| 1847 | }
|
|---|
| 1848 |
|
|---|
| 1849 | /* Done already? */
|
|---|
| 1850 | if (offEnd >= cwcPath)
|
|---|
| 1851 | {
|
|---|
| 1852 | if ( pChild->uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 1853 | || pChild->uCacheGen == (pChild->bObjType != KFSOBJ_TYPE_MISSING ? pCache->uGeneration : pCache->uGenerationMissing)
|
|---|
| 1854 | || kFsCacheRefreshObj(pCache, pChild, penmError))
|
|---|
| 1855 | return kFsCacheObjRetainInternal(pChild);
|
|---|
| 1856 | return NULL;
|
|---|
| 1857 | }
|
|---|
| 1858 |
|
|---|
| 1859 | /* Check that we've got a valid result and not a cached negative one. */
|
|---|
| 1860 | if (pChild->bObjType == KFSOBJ_TYPE_DIR)
|
|---|
| 1861 | { /* likely */ }
|
|---|
| 1862 | else
|
|---|
| 1863 | {
|
|---|
| 1864 | kHlpAssert(pChild->bObjType == KFSOBJ_TYPE_MISSING);
|
|---|
| 1865 | kHlpAssert(pChild->uCacheGen == KFSOBJ_CACHE_GEN_IGNORE || pChild->uCacheGen == pCache->uGenerationMissing);
|
|---|
| 1866 | return pChild;
|
|---|
| 1867 | }
|
|---|
| 1868 |
|
|---|
| 1869 | /* Next component. */
|
|---|
| 1870 | pParent = (PKFSDIR)pChild;
|
|---|
| 1871 | off = offEnd + cwcSlashes;
|
|---|
| 1872 |
|
|---|
| 1873 |
|
|---|
| 1874 | /*
|
|---|
| 1875 | * Walk loop.
|
|---|
| 1876 | */
|
|---|
| 1877 | for (;;)
|
|---|
| 1878 | {
|
|---|
| 1879 | /*
|
|---|
| 1880 | * Find the end of the component, counting trailing slashes.
|
|---|
| 1881 | */
|
|---|
| 1882 | wchar_t wc;
|
|---|
| 1883 | cwcSlashes = 0;
|
|---|
| 1884 | offEnd = off + 1;
|
|---|
| 1885 | while ((wc = pwszPath[offEnd]) != '\0')
|
|---|
| 1886 | {
|
|---|
| 1887 | if (!IS_SLASH(wc))
|
|---|
| 1888 | offEnd++;
|
|---|
| 1889 | else
|
|---|
| 1890 | {
|
|---|
| 1891 | do
|
|---|
| 1892 | cwcSlashes++;
|
|---|
| 1893 | while (IS_SLASH(pwszPath[offEnd + cwcSlashes]));
|
|---|
| 1894 | break;
|
|---|
| 1895 | }
|
|---|
| 1896 | }
|
|---|
| 1897 |
|
|---|
| 1898 | /*
|
|---|
| 1899 | * Do we need to populate or refresh this directory first?
|
|---|
| 1900 | */
|
|---|
| 1901 | if ( pParent->fPopulated
|
|---|
| 1902 | && ( pParent->Obj.uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 1903 | || pParent->Obj.uCacheGen == pCache->uGeneration) )
|
|---|
| 1904 | { /* likely */ }
|
|---|
| 1905 | else if (kFsCachePopuplateOrRefreshDir(pCache, pParent, penmError))
|
|---|
| 1906 | { /* likely */ }
|
|---|
| 1907 | else
|
|---|
| 1908 | return NULL;
|
|---|
| 1909 |
|
|---|
| 1910 | /*
|
|---|
| 1911 | * Search the current node for the name.
|
|---|
| 1912 | *
|
|---|
| 1913 | * If we don't find it, we may insert a missing node depending on
|
|---|
| 1914 | * the cache configuration.
|
|---|
| 1915 | */
|
|---|
| 1916 | pChild = kFsCacheFindChildW(pCache, pParent, &pwszPath[off], offEnd - off);
|
|---|
| 1917 | if (pChild != NULL)
|
|---|
| 1918 | { /* probably likely */ }
|
|---|
| 1919 | else
|
|---|
| 1920 | {
|
|---|
| 1921 | if (pCache->fFlags & KFSCACHE_F_MISSING_OBJECTS)
|
|---|
| 1922 | pChild = kFsCacheCreateMissingW(pCache, pParent, &pwszPath[off], offEnd - off, penmError);
|
|---|
| 1923 | if (cwcSlashes == 0 || offEnd + cwcSlashes >= cwcPath)
|
|---|
| 1924 | {
|
|---|
| 1925 | if (pChild)
|
|---|
| 1926 | return pChild;
|
|---|
| 1927 | *penmError = KFSLOOKUPERROR_NOT_FOUND;
|
|---|
| 1928 | }
|
|---|
| 1929 | else
|
|---|
| 1930 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_FOUND;
|
|---|
| 1931 | return NULL;
|
|---|
| 1932 | }
|
|---|
| 1933 |
|
|---|
| 1934 | /* Advance off and check if we're done already. */
|
|---|
| 1935 | off = offEnd + cwcSlashes;
|
|---|
| 1936 | if ( cwcSlashes == 0
|
|---|
| 1937 | || off >= cwcPath)
|
|---|
| 1938 | {
|
|---|
| 1939 | if ( pChild->bObjType != KFSOBJ_TYPE_MISSING
|
|---|
| 1940 | || pChild->uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 1941 | || pChild->uCacheGen == pCache->uGenerationMissing
|
|---|
| 1942 | || kFsCacheRefreshMissing(pCache, pChild, penmError) )
|
|---|
| 1943 | { /* likely */ }
|
|---|
| 1944 | else
|
|---|
| 1945 | return NULL;
|
|---|
| 1946 | return pChild;
|
|---|
| 1947 | }
|
|---|
| 1948 |
|
|---|
| 1949 | /*
|
|---|
| 1950 | * Check that it's a directory. If a missing entry, we may have to
|
|---|
| 1951 | * refresh it and re-examin it.
|
|---|
| 1952 | */
|
|---|
| 1953 | if (pChild->bObjType == KFSOBJ_TYPE_DIR)
|
|---|
| 1954 | pParent = (PKFSDIR)pChild;
|
|---|
| 1955 | else if (pChild->bObjType != KFSOBJ_TYPE_MISSING)
|
|---|
| 1956 | {
|
|---|
| 1957 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_DIR;
|
|---|
| 1958 | return NULL;
|
|---|
| 1959 | }
|
|---|
| 1960 | else if ( pChild->uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 1961 | || pChild->uCacheGen == pCache->uGenerationMissing)
|
|---|
| 1962 | {
|
|---|
| 1963 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_FOUND;
|
|---|
| 1964 | return NULL;
|
|---|
| 1965 | }
|
|---|
| 1966 | else if (kFsCacheRefreshMissingIntermediateDir(pCache, pChild, penmError))
|
|---|
| 1967 | pParent = (PKFSDIR)pChild;
|
|---|
| 1968 | else
|
|---|
| 1969 | return NULL;
|
|---|
| 1970 | }
|
|---|
| 1971 |
|
|---|
| 1972 | return NULL;
|
|---|
| 1973 | }
|
|---|
| 1974 |
|
|---|
| 1975 |
|
|---|
| 1976 | /**
|
|---|
| 1977 | * This deals with paths that are relative and paths that contains '..'
|
|---|
| 1978 | * elements, ANSI version.
|
|---|
| 1979 | *
|
|---|
| 1980 | * @returns Pointer to object corresponding to @a pszPath on success.
|
|---|
| 1981 | * NULL if this isn't a path we care to cache.
|
|---|
| 1982 | *
|
|---|
| 1983 | * @param pCache The cache.
|
|---|
| 1984 | * @param pszPath The path.
|
|---|
| 1985 | * @param cchPath The length of the path.
|
|---|
| 1986 | * @param penmError Where to return details as to why the lookup
|
|---|
| 1987 | * failed.
|
|---|
| 1988 | */
|
|---|
| 1989 | static PKFSOBJ kFsCacheLookupSlowA(PKFSCACHE pCache, const char *pszPath, KU32 cchPath, KFSLOOKUPERROR *penmError)
|
|---|
| 1990 | {
|
|---|
| 1991 | /*
|
|---|
| 1992 | * We just call GetFullPathNameA here to do the job as getcwd and _getdcwd
|
|---|
| 1993 | * ends up calling it anyway.
|
|---|
| 1994 | */
|
|---|
| 1995 | char szFull[KFSCACHE_CFG_MAX_PATH];
|
|---|
| 1996 | UINT cchFull = GetFullPathNameA(pszPath, sizeof(szFull), szFull, NULL);
|
|---|
| 1997 | if ( cchFull >= 3
|
|---|
| 1998 | && cchFull < sizeof(szFull))
|
|---|
| 1999 | {
|
|---|
| 2000 | PKFSOBJ pFsObj;
|
|---|
| 2001 | KFSCACHE_LOG(("kFsCacheLookupSlowA(%s)\n", pszPath));
|
|---|
| 2002 | pFsObj = kFsCacheLookupAbsoluteA(pCache, szFull, cchFull, penmError);
|
|---|
| 2003 |
|
|---|
| 2004 | #if 0 /* No need to do this until it's actually queried. */
|
|---|
| 2005 | /* Cache the resulting path. */
|
|---|
| 2006 | if ( pFsObj
|
|---|
| 2007 | || (pCache->fFlags & KFSCACHE_F_MISSING_PATHS)
|
|---|
| 2008 | || *penmError == KFSLOOKUPERROR_UNSUPPORTED)
|
|---|
| 2009 | {
|
|---|
| 2010 | KU32 uHashPath = kFsCacheStrHash(szFull);
|
|---|
| 2011 | kFsCacheCreatePathHashTabEntryA(pCache, pFsObj, pszPath, cchPath, uHashPath,
|
|---|
| 2012 | uHashPath % K_ELEMENTS(pCache->apAnsiPaths), *penmError);
|
|---|
| 2013 | }
|
|---|
| 2014 | #endif
|
|---|
| 2015 | return pFsObj;
|
|---|
| 2016 | }
|
|---|
| 2017 |
|
|---|
| 2018 | /* The path is too long! */
|
|---|
| 2019 | kHlpAssertMsgFailed(("'%s' -> cchFull=%u\n", pszPath, cchFull));
|
|---|
| 2020 | *penmError = KFSLOOKUPERROR_PATH_TOO_LONG;
|
|---|
| 2021 | return NULL;
|
|---|
| 2022 | }
|
|---|
| 2023 |
|
|---|
| 2024 |
|
|---|
| 2025 | /**
|
|---|
| 2026 | * This deals with paths that are relative and paths that contains '..'
|
|---|
| 2027 | * elements, UTF-16 version.
|
|---|
| 2028 | *
|
|---|
| 2029 | * @returns Pointer to object corresponding to @a pszPath on success.
|
|---|
| 2030 | * NULL if this isn't a path we care to cache.
|
|---|
| 2031 | *
|
|---|
| 2032 | * @param pCache The cache.
|
|---|
| 2033 | * @param pwszPath The path.
|
|---|
| 2034 | * @param cwcPath The length of the path (in wchar_t's).
|
|---|
| 2035 | * @param penmError Where to return details as to why the lookup
|
|---|
| 2036 | * failed.
|
|---|
| 2037 | */
|
|---|
| 2038 | static PKFSOBJ kFsCacheLookupSlowW(PKFSCACHE pCache, const wchar_t *pwszPath, KU32 wcwPath, KFSLOOKUPERROR *penmError)
|
|---|
| 2039 | {
|
|---|
| 2040 | /*
|
|---|
| 2041 | * We just call GetFullPathNameA here to do the job as getcwd and _getdcwd
|
|---|
| 2042 | * ends up calling it anyway.
|
|---|
| 2043 | */
|
|---|
| 2044 | wchar_t wszFull[KFSCACHE_CFG_MAX_PATH];
|
|---|
| 2045 | UINT cwcFull = GetFullPathNameW(pwszPath, KFSCACHE_CFG_MAX_PATH, wszFull, NULL);
|
|---|
| 2046 | if ( cwcFull >= 3
|
|---|
| 2047 | && cwcFull < KFSCACHE_CFG_MAX_PATH)
|
|---|
| 2048 | {
|
|---|
| 2049 | PKFSOBJ pFsObj;
|
|---|
| 2050 | KFSCACHE_LOG(("kFsCacheLookupSlowA(%ls)\n", pwszPath));
|
|---|
| 2051 | pFsObj = kFsCacheLookupAbsoluteW(pCache, wszFull, cwcFull, penmError);
|
|---|
| 2052 |
|
|---|
| 2053 | #if 0 /* No need to do this until it's actually queried. */
|
|---|
| 2054 | /* Cache the resulting path. */
|
|---|
| 2055 | if ( pFsObj
|
|---|
| 2056 | || (pCache->fFlags & KFSCACHE_F_MISSING_PATHS)
|
|---|
| 2057 | || *penmError == KFSLOOKUPERROR_UNSUPPORTED)
|
|---|
| 2058 | {
|
|---|
| 2059 | KU32 uHashPath = kFsCacheStrHash(szFull);
|
|---|
| 2060 | kFsCacheCreatePathHashTabEntryA(pCache, pFsObj, pszPath, cchPath, uHashPath,
|
|---|
| 2061 | uHashPath % K_ELEMENTS(pCache->apAnsiPaths), *penmError);
|
|---|
| 2062 | }
|
|---|
| 2063 | #endif
|
|---|
| 2064 | return pFsObj;
|
|---|
| 2065 | }
|
|---|
| 2066 |
|
|---|
| 2067 | /* The path is too long! */
|
|---|
| 2068 | kHlpAssertMsgFailed(("'%ls' -> cwcFull=%u\n", pwszPath, cwcFull));
|
|---|
| 2069 | *penmError = KFSLOOKUPERROR_PATH_TOO_LONG;
|
|---|
| 2070 | return NULL;
|
|---|
| 2071 | }
|
|---|
| 2072 |
|
|---|
| 2073 |
|
|---|
| 2074 | /**
|
|---|
| 2075 | * Refreshes a path hash that has expired, ANSI version.
|
|---|
| 2076 | *
|
|---|
| 2077 | * @returns pHash on success, NULL if removed.
|
|---|
| 2078 | * @param pCache The cache.
|
|---|
| 2079 | * @param pHashEntry The path hash.
|
|---|
| 2080 | * @param idxHashTab The hash table entry.
|
|---|
| 2081 | */
|
|---|
| 2082 | static PKFSHASHA kFsCacheRefreshPathA(PKFSCACHE pCache, PKFSHASHA pHashEntry, KU32 idxHashTab)
|
|---|
| 2083 | {
|
|---|
| 2084 | /** @todo implement once we've start inserting uCacheGen nodes. */
|
|---|
| 2085 | __debugbreak();
|
|---|
| 2086 | K_NOREF(pCache);
|
|---|
| 2087 | K_NOREF(idxHashTab);
|
|---|
| 2088 | return pHashEntry;
|
|---|
| 2089 | }
|
|---|
| 2090 |
|
|---|
| 2091 |
|
|---|
| 2092 | /**
|
|---|
| 2093 | * Refreshes a path hash that has expired, UTF-16 version.
|
|---|
| 2094 | *
|
|---|
| 2095 | * @returns pHash on success, NULL if removed.
|
|---|
| 2096 | * @param pCache The cache.
|
|---|
| 2097 | * @param pHashEntry The path hash.
|
|---|
| 2098 | * @param idxHashTab The hash table entry.
|
|---|
| 2099 | */
|
|---|
| 2100 | static PKFSHASHW kFsCacheRefreshPathW(PKFSCACHE pCache, PKFSHASHW pHashEntry, KU32 idxHashTab)
|
|---|
| 2101 | {
|
|---|
| 2102 | /** @todo implement once we've start inserting uCacheGen nodes. */
|
|---|
| 2103 | __debugbreak();
|
|---|
| 2104 | K_NOREF(pCache);
|
|---|
| 2105 | K_NOREF(idxHashTab);
|
|---|
| 2106 | return pHashEntry;
|
|---|
| 2107 | }
|
|---|
| 2108 |
|
|---|
| 2109 |
|
|---|
| 2110 | /**
|
|---|
| 2111 | * Looks up a KFSOBJ for the given ANSI path.
|
|---|
| 2112 | *
|
|---|
| 2113 | * This will first try the hash table. If not in the hash table, the file
|
|---|
| 2114 | * system cache tree is walked, missing bits filled in and finally a hash table
|
|---|
| 2115 | * entry is created.
|
|---|
| 2116 | *
|
|---|
| 2117 | * Only drive letter paths are cachable. We don't do any UNC paths at this
|
|---|
| 2118 | * point.
|
|---|
| 2119 | *
|
|---|
| 2120 | * @returns Reference to object corresponding to @a pszPath on success, this
|
|---|
| 2121 | * must be released by kwFsCacheRelease.
|
|---|
| 2122 | * NULL if not a path we care to cache.
|
|---|
| 2123 | * @param pCache The cache.
|
|---|
| 2124 | * @param pszPath The path to lookup.
|
|---|
| 2125 | * @param penmError Where to return details as to why the lookup
|
|---|
| 2126 | * failed.
|
|---|
| 2127 | */
|
|---|
| 2128 | PKFSOBJ kFsCacheLookupA(PKFSCACHE pCache, const char *pszPath, KFSLOOKUPERROR *penmError)
|
|---|
| 2129 | {
|
|---|
| 2130 | /*
|
|---|
| 2131 | * Do hash table lookup of the path.
|
|---|
| 2132 | */
|
|---|
| 2133 | KU32 uHashPath;
|
|---|
| 2134 | KU32 cchPath = (KU32)kFsCacheStrHashEx(pszPath, &uHashPath);
|
|---|
| 2135 | KU32 idxHashTab = uHashPath % K_ELEMENTS(pCache->apAnsiPaths);
|
|---|
| 2136 | PKFSHASHA pHashEntry = pCache->apAnsiPaths[idxHashTab];
|
|---|
| 2137 | kHlpAssert(pCache->u32Magic == KFSCACHE_MAGIC);
|
|---|
| 2138 | if (pHashEntry)
|
|---|
| 2139 | {
|
|---|
| 2140 | do
|
|---|
| 2141 | {
|
|---|
| 2142 | if ( pHashEntry->uHashPath == uHashPath
|
|---|
| 2143 | && pHashEntry->cchPath == cchPath
|
|---|
| 2144 | && kHlpMemComp(pHashEntry->pszPath, pszPath, cchPath) == 0)
|
|---|
| 2145 | {
|
|---|
| 2146 | if ( pHashEntry->uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 2147 | || pHashEntry->uCacheGen == pCache->uGeneration
|
|---|
| 2148 | || (pHashEntry = kFsCacheRefreshPathA(pCache, pHashEntry, idxHashTab)) )
|
|---|
| 2149 | {
|
|---|
| 2150 | pCache->cLookups++;
|
|---|
| 2151 | pCache->cPathHashHits++;
|
|---|
| 2152 | KFSCACHE_LOG(("kFsCacheLookupA(%s) - hit %p\n", pszPath, pHashEntry->pFsObj));
|
|---|
| 2153 | *penmError = pHashEntry->enmError;
|
|---|
| 2154 | if (pHashEntry->pFsObj)
|
|---|
| 2155 | return kFsCacheObjRetainInternal(pHashEntry->pFsObj);
|
|---|
| 2156 | return NULL;
|
|---|
| 2157 | }
|
|---|
| 2158 | break;
|
|---|
| 2159 | }
|
|---|
| 2160 | pHashEntry = pHashEntry->pNext;
|
|---|
| 2161 | } while (pHashEntry);
|
|---|
| 2162 | }
|
|---|
| 2163 |
|
|---|
| 2164 | /*
|
|---|
| 2165 | * Create an entry for it by walking the file system cache and filling in the blanks.
|
|---|
| 2166 | */
|
|---|
| 2167 | if ( cchPath > 0
|
|---|
| 2168 | && cchPath < KFSCACHE_CFG_MAX_PATH)
|
|---|
| 2169 | {
|
|---|
| 2170 | PKFSOBJ pFsObj;
|
|---|
| 2171 |
|
|---|
| 2172 | /* Is absolute without any '..' bits? */
|
|---|
| 2173 | if ( cchPath >= 3
|
|---|
| 2174 | && ( ( pszPath[1] == ':' /* Drive letter */
|
|---|
| 2175 | && IS_SLASH(pszPath[2])
|
|---|
| 2176 | && IS_ALPHA(pszPath[0]) )
|
|---|
| 2177 | || ( IS_SLASH(pszPath[0]) /* UNC */
|
|---|
| 2178 | && IS_SLASH(pszPath[1]) ) )
|
|---|
| 2179 | && !kFsCacheHasDotDotA(pszPath, cchPath) )
|
|---|
| 2180 | pFsObj = kFsCacheLookupAbsoluteA(pCache, pszPath, cchPath, penmError);
|
|---|
| 2181 | else
|
|---|
| 2182 | pFsObj = kFsCacheLookupSlowA(pCache, pszPath, cchPath, penmError);
|
|---|
| 2183 | if ( pFsObj
|
|---|
| 2184 | || ( (pCache->fFlags & KFSCACHE_F_MISSING_PATHS)
|
|---|
| 2185 | && *penmError != KFSLOOKUPERROR_PATH_TOO_LONG)
|
|---|
| 2186 | || *penmError == KFSLOOKUPERROR_UNSUPPORTED )
|
|---|
| 2187 | kFsCacheCreatePathHashTabEntryA(pCache, pFsObj, pszPath, cchPath, uHashPath, idxHashTab, *penmError);
|
|---|
| 2188 |
|
|---|
| 2189 | pCache->cLookups++;
|
|---|
| 2190 | if (pFsObj)
|
|---|
| 2191 | pCache->cWalkHits++;
|
|---|
| 2192 | return pFsObj;
|
|---|
| 2193 | }
|
|---|
| 2194 |
|
|---|
| 2195 | *penmError = KFSLOOKUPERROR_PATH_TOO_LONG;
|
|---|
| 2196 | return NULL;
|
|---|
| 2197 | }
|
|---|
| 2198 |
|
|---|
| 2199 |
|
|---|
| 2200 | /**
|
|---|
| 2201 | * Looks up a KFSOBJ for the given UTF-16 path.
|
|---|
| 2202 | *
|
|---|
| 2203 | * This will first try the hash table. If not in the hash table, the file
|
|---|
| 2204 | * system cache tree is walked, missing bits filled in and finally a hash table
|
|---|
| 2205 | * entry is created.
|
|---|
| 2206 | *
|
|---|
| 2207 | * Only drive letter paths are cachable. We don't do any UNC paths at this
|
|---|
| 2208 | * point.
|
|---|
| 2209 | *
|
|---|
| 2210 | * @returns Reference to object corresponding to @a pszPath on success, this
|
|---|
| 2211 | * must be released by kwFsCacheRelease.
|
|---|
| 2212 | * NULL if not a path we care to cache.
|
|---|
| 2213 | * @param pCache The cache.
|
|---|
| 2214 | * @param pwszPath The path to lookup.
|
|---|
| 2215 | * @param penmError Where to return details as to why the lookup
|
|---|
| 2216 | * failed.
|
|---|
| 2217 | */
|
|---|
| 2218 | PKFSOBJ kFsCacheLookupW(PKFSCACHE pCache, const wchar_t *pwszPath, KFSLOOKUPERROR *penmError)
|
|---|
| 2219 | {
|
|---|
| 2220 | /*
|
|---|
| 2221 | * Do hash table lookup of the path.
|
|---|
| 2222 | */
|
|---|
| 2223 | KU32 uHashPath;
|
|---|
| 2224 | KU32 cwcPath = (KU32)kFsCacheUtf16HashEx(pwszPath, &uHashPath);
|
|---|
| 2225 | KU32 idxHashTab = uHashPath % K_ELEMENTS(pCache->apAnsiPaths);
|
|---|
| 2226 | PKFSHASHW pHashEntry = pCache->apUtf16Paths[idxHashTab];
|
|---|
| 2227 | kHlpAssert(pCache->u32Magic == KFSCACHE_MAGIC);
|
|---|
| 2228 | if (pHashEntry)
|
|---|
| 2229 | {
|
|---|
| 2230 | do
|
|---|
| 2231 | {
|
|---|
| 2232 | if ( pHashEntry->uHashPath == uHashPath
|
|---|
| 2233 | && pHashEntry->cwcPath == cwcPath
|
|---|
| 2234 | && kHlpMemComp(pHashEntry->pwszPath, pwszPath, cwcPath) == 0)
|
|---|
| 2235 | {
|
|---|
| 2236 | if ( pHashEntry->uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 2237 | || pHashEntry->uCacheGen == pCache->uGeneration
|
|---|
| 2238 | || (pHashEntry = kFsCacheRefreshPathW(pCache, pHashEntry, idxHashTab)) )
|
|---|
| 2239 | {
|
|---|
| 2240 | pCache->cLookups++;
|
|---|
| 2241 | pCache->cPathHashHits++;
|
|---|
| 2242 | KFSCACHE_LOG(("kFsCacheLookupW(%ls) - hit %p\n", pwszPath, pHashEntry->pFsObj));
|
|---|
| 2243 | *penmError = pHashEntry->enmError;
|
|---|
| 2244 | if (pHashEntry->pFsObj)
|
|---|
| 2245 | return kFsCacheObjRetainInternal(pHashEntry->pFsObj);
|
|---|
| 2246 | return NULL;
|
|---|
| 2247 | }
|
|---|
| 2248 | break;
|
|---|
| 2249 | }
|
|---|
| 2250 | pHashEntry = pHashEntry->pNext;
|
|---|
| 2251 | } while (pHashEntry);
|
|---|
| 2252 | }
|
|---|
| 2253 |
|
|---|
| 2254 | /*
|
|---|
| 2255 | * Create an entry for it by walking the file system cache and filling in the blanks.
|
|---|
| 2256 | */
|
|---|
| 2257 | if ( cwcPath > 0
|
|---|
| 2258 | && cwcPath < KFSCACHE_CFG_MAX_PATH)
|
|---|
| 2259 | {
|
|---|
| 2260 | PKFSOBJ pFsObj;
|
|---|
| 2261 |
|
|---|
| 2262 | /* Is absolute without any '..' bits? */
|
|---|
| 2263 | if ( cwcPath >= 3
|
|---|
| 2264 | && ( ( pwszPath[1] == ':' /* Drive letter */
|
|---|
| 2265 | && IS_SLASH(pwszPath[2])
|
|---|
| 2266 | && IS_ALPHA(pwszPath[0]) )
|
|---|
| 2267 | || ( IS_SLASH(pwszPath[0]) /* UNC */
|
|---|
| 2268 | && IS_SLASH(pwszPath[1]) ) )
|
|---|
| 2269 | && !kFsCacheHasDotDotW(pwszPath, cwcPath) )
|
|---|
| 2270 | pFsObj = kFsCacheLookupAbsoluteW(pCache, pwszPath, cwcPath, penmError);
|
|---|
| 2271 | else
|
|---|
| 2272 | pFsObj = kFsCacheLookupSlowW(pCache, pwszPath, cwcPath, penmError);
|
|---|
| 2273 | if ( pFsObj
|
|---|
| 2274 | || ( (pCache->fFlags & KFSCACHE_F_MISSING_PATHS)
|
|---|
| 2275 | && *penmError != KFSLOOKUPERROR_PATH_TOO_LONG)
|
|---|
| 2276 | || *penmError == KFSLOOKUPERROR_UNSUPPORTED )
|
|---|
| 2277 | kFsCacheCreatePathHashTabEntryW(pCache, pFsObj, pwszPath, cwcPath, uHashPath, idxHashTab, *penmError);
|
|---|
| 2278 |
|
|---|
| 2279 | pCache->cLookups++;
|
|---|
| 2280 | if (pFsObj)
|
|---|
| 2281 | pCache->cWalkHits++;
|
|---|
| 2282 | return pFsObj;
|
|---|
| 2283 | }
|
|---|
| 2284 |
|
|---|
| 2285 | *penmError = KFSLOOKUPERROR_PATH_TOO_LONG;
|
|---|
| 2286 | return NULL;
|
|---|
| 2287 | }
|
|---|
| 2288 |
|
|---|
| 2289 |
|
|---|
| 2290 | /**
|
|---|
| 2291 | * Destroys a cache object which has a zero reference count.
|
|---|
| 2292 | *
|
|---|
| 2293 | * @returns 0
|
|---|
| 2294 | * @param pCache The cache.
|
|---|
| 2295 | * @param pObj The object.
|
|---|
| 2296 | */
|
|---|
| 2297 | KU32 kFsCacheObjDestroy(PKFSCACHE pCache, PKFSOBJ pObj)
|
|---|
| 2298 | {
|
|---|
| 2299 | kHlpAssert(pObj->cRefs == 0);
|
|---|
| 2300 | kHlpAssert(pObj->pParent == NULL);
|
|---|
| 2301 | kHlpAssert(pObj->u32Magic == KFSOBJ_MAGIC);
|
|---|
| 2302 |
|
|---|
| 2303 | /*
|
|---|
| 2304 | * Invalidate the structure.
|
|---|
| 2305 | */
|
|---|
| 2306 | pObj->u32Magic = ~KFSOBJ_MAGIC;
|
|---|
| 2307 |
|
|---|
| 2308 | /*
|
|---|
| 2309 | * Destroy any user data first.
|
|---|
| 2310 | */
|
|---|
| 2311 | while (pObj->pUserDataHead != NULL)
|
|---|
| 2312 | {
|
|---|
| 2313 | PKFSUSERDATA pUserData = pObj->pUserDataHead;
|
|---|
| 2314 | pObj->pUserDataHead = pUserData->pNext;
|
|---|
| 2315 | pUserData->pfnDestructor(pCache, pObj, pUserData);
|
|---|
| 2316 | kHlpFree(pUserData);
|
|---|
| 2317 | }
|
|---|
| 2318 |
|
|---|
| 2319 | /*
|
|---|
| 2320 | * Do type specific destruction
|
|---|
| 2321 | */
|
|---|
| 2322 | switch (pObj->bObjType)
|
|---|
| 2323 | {
|
|---|
| 2324 | case KFSOBJ_TYPE_MISSING:
|
|---|
| 2325 | /* nothing else to do here */
|
|---|
| 2326 | pCache->cbObjects -= sizeof(KFSDIR);
|
|---|
| 2327 | break;
|
|---|
| 2328 |
|
|---|
| 2329 | case KFSOBJ_TYPE_DIR:
|
|---|
| 2330 | {
|
|---|
| 2331 | PKFSDIR pDir = (PKFSDIR)pObj;
|
|---|
| 2332 | KU32 cChildren = pDir->cChildren;
|
|---|
| 2333 | pCache->cbObjects -= sizeof(*pDir)
|
|---|
| 2334 | + K_ALIGN_Z(cChildren, 16) * sizeof(pDir->papChildren)
|
|---|
| 2335 | + pDir->cHashTab * sizeof(pDir->paHashTab);
|
|---|
| 2336 |
|
|---|
| 2337 | pDir->cChildren = 0;
|
|---|
| 2338 | while (cChildren-- > 0)
|
|---|
| 2339 | kFsCacheObjRelease(pCache, pDir->papChildren[cChildren]);
|
|---|
| 2340 | kHlpFree(pDir->papChildren);
|
|---|
| 2341 | pDir->papChildren = NULL;
|
|---|
| 2342 |
|
|---|
| 2343 | kHlpFree(pDir->paHashTab);
|
|---|
| 2344 | pDir->paHashTab = NULL;
|
|---|
| 2345 | break;
|
|---|
| 2346 | }
|
|---|
| 2347 |
|
|---|
| 2348 | case KFSOBJ_TYPE_FILE:
|
|---|
| 2349 | case KFSOBJ_TYPE_OTHER:
|
|---|
| 2350 | pCache->cbObjects -= sizeof(*pObj);
|
|---|
| 2351 | break;
|
|---|
| 2352 |
|
|---|
| 2353 | default:
|
|---|
| 2354 | return 0;
|
|---|
| 2355 | }
|
|---|
| 2356 |
|
|---|
| 2357 | /*
|
|---|
| 2358 | * Common bits.
|
|---|
| 2359 | */
|
|---|
| 2360 | pCache->cbObjects -= pObj->cchName + 1;
|
|---|
| 2361 | #ifdef KFSCACHE_CFG_UTF16
|
|---|
| 2362 | pCache->cbObjects -= (pObj->cwcName + 1) * sizeof(wchar_t);
|
|---|
| 2363 | #endif
|
|---|
| 2364 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 2365 | if (pObj->pszName != pObj->pszShortName)
|
|---|
| 2366 | {
|
|---|
| 2367 | pCache->cbObjects -= pObj->cchShortName + 1;
|
|---|
| 2368 | # ifdef KFSCACHE_CFG_UTF16
|
|---|
| 2369 | pCache->cbObjects -= (pObj->cwcShortName + 1) * sizeof(wchar_t);
|
|---|
| 2370 | # endif
|
|---|
| 2371 | }
|
|---|
| 2372 | #endif
|
|---|
| 2373 | pCache->cObjects--;
|
|---|
| 2374 |
|
|---|
| 2375 | kHlpFree(pObj);
|
|---|
| 2376 | return 0;
|
|---|
| 2377 | }
|
|---|
| 2378 |
|
|---|
| 2379 |
|
|---|
| 2380 | /**
|
|---|
| 2381 | * Releases a reference to a cache object.
|
|---|
| 2382 | *
|
|---|
| 2383 | * @returns New reference count.
|
|---|
| 2384 | * @param pCache The cache.
|
|---|
| 2385 | * @param pObj The object.
|
|---|
| 2386 | */
|
|---|
| 2387 | KU32 kFsCacheObjRelease(PKFSCACHE pCache, PKFSOBJ pObj)
|
|---|
| 2388 | {
|
|---|
| 2389 | KU32 cRefs;
|
|---|
| 2390 | kHlpAssert(pCache->u32Magic == KFSCACHE_MAGIC);
|
|---|
| 2391 | kHlpAssert(pObj->u32Magic == KFSOBJ_MAGIC);
|
|---|
| 2392 |
|
|---|
| 2393 | cRefs = --pObj->cRefs;
|
|---|
| 2394 | if (cRefs)
|
|---|
| 2395 | return cRefs;
|
|---|
| 2396 | return kFsCacheObjDestroy(pCache, pObj);
|
|---|
| 2397 | }
|
|---|
| 2398 |
|
|---|
| 2399 |
|
|---|
| 2400 | /**
|
|---|
| 2401 | * Retains a reference to a cahce object.
|
|---|
| 2402 | *
|
|---|
| 2403 | * @returns New reference count.
|
|---|
| 2404 | * @param pObj The object.
|
|---|
| 2405 | */
|
|---|
| 2406 | KU32 kFsCacheObjRetain(PKFSOBJ pObj)
|
|---|
| 2407 | {
|
|---|
| 2408 | KU32 cRefs;
|
|---|
| 2409 | kHlpAssert(pCache->u32Magic == KFSCACHE_MAGIC);
|
|---|
| 2410 | kHlpAssert(pObj->u32Magic == KFSOBJ_MAGIC);
|
|---|
| 2411 |
|
|---|
| 2412 | cRefs = ++pObj->cRefs;
|
|---|
| 2413 | kHlpAssert(cRefs < 16384);
|
|---|
| 2414 | return cRefs;
|
|---|
| 2415 | }
|
|---|
| 2416 |
|
|---|
| 2417 |
|
|---|
| 2418 |
|
|---|
| 2419 | PKFSCACHE kFsCacheCreate(KU32 fFlags)
|
|---|
| 2420 | {
|
|---|
| 2421 | PKFSCACHE pCache;
|
|---|
| 2422 | birdResolveImports();
|
|---|
| 2423 |
|
|---|
| 2424 | pCache = (PKFSCACHE)kHlpAllocZ(sizeof(*pCache));
|
|---|
| 2425 | if (pCache)
|
|---|
| 2426 | {
|
|---|
| 2427 | /* Dummy root dir entry. */
|
|---|
| 2428 | pCache->RootDir.Obj.u32Magic = KFSOBJ_MAGIC;
|
|---|
| 2429 | pCache->RootDir.Obj.cRefs = 1;
|
|---|
| 2430 | pCache->RootDir.Obj.uCacheGen = KFSOBJ_CACHE_GEN_IGNORE;
|
|---|
| 2431 | pCache->RootDir.Obj.bObjType = KFSOBJ_TYPE_DIR;
|
|---|
| 2432 | pCache->RootDir.Obj.fHaveStats = K_FALSE;
|
|---|
| 2433 | pCache->RootDir.Obj.pParent = NULL;
|
|---|
| 2434 | pCache->RootDir.Obj.pszName = "";
|
|---|
| 2435 | pCache->RootDir.Obj.cchName = 0;
|
|---|
| 2436 | pCache->RootDir.Obj.cchParent = 0;
|
|---|
| 2437 | #ifdef KFSCACHE_CFG_UTF16
|
|---|
| 2438 | pCache->RootDir.Obj.cwcName = 0;
|
|---|
| 2439 | pCache->RootDir.Obj.cwcParent = 0;
|
|---|
| 2440 | pCache->RootDir.Obj.pwszName = L"";
|
|---|
| 2441 | #endif
|
|---|
| 2442 |
|
|---|
| 2443 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 2444 | pCache->RootDir.Obj.pszShortName = NULL;
|
|---|
| 2445 | pCache->RootDir.Obj.cchShortName = 0;
|
|---|
| 2446 | pCache->RootDir.Obj.cchShortParent = 0;
|
|---|
| 2447 | # ifdef KFSCACHE_CFG_UTF16
|
|---|
| 2448 | pCache->RootDir.Obj.cwcShortName;
|
|---|
| 2449 | pCache->RootDir.Obj.cwcShortParent;
|
|---|
| 2450 | pCache->RootDir.Obj.pwszShortName;
|
|---|
| 2451 | # endif
|
|---|
| 2452 | #endif
|
|---|
| 2453 | pCache->RootDir.cChildren = 0;
|
|---|
| 2454 | pCache->RootDir.papChildren = NULL;
|
|---|
| 2455 | pCache->RootDir.hDir = INVALID_HANDLE_VALUE;
|
|---|
| 2456 | pCache->RootDir.cHashTab = 251;
|
|---|
| 2457 | pCache->RootDir.paHashTab = (PKFSOBJHASH)kHlpAllocZ( pCache->RootDir.cHashTab
|
|---|
| 2458 | * sizeof(pCache->RootDir.paHashTab[0]));
|
|---|
| 2459 | if (pCache->RootDir.paHashTab)
|
|---|
| 2460 | {
|
|---|
| 2461 | /* The cache itself. */
|
|---|
| 2462 | pCache->u32Magic = KFSCACHE_MAGIC;
|
|---|
| 2463 | pCache->fFlags = fFlags;
|
|---|
| 2464 | pCache->uGeneration = 1;
|
|---|
| 2465 | pCache->cObjects = 1;
|
|---|
| 2466 | pCache->cbObjects = sizeof(pCache->RootDir) + pCache->RootDir.cHashTab * sizeof(pCache->RootDir.paHashTab[0]);
|
|---|
| 2467 | pCache->cPathHashHits = 0;
|
|---|
| 2468 | pCache->cWalkHits = 0;
|
|---|
| 2469 | pCache->cAnsiPaths = 0;
|
|---|
| 2470 | pCache->cAnsiPathCollisions = 0;
|
|---|
| 2471 | pCache->cbAnsiPaths = 0;
|
|---|
| 2472 | #ifdef KFSCACHE_CFG_UTF16
|
|---|
| 2473 | pCache->cUtf16Paths = 0;
|
|---|
| 2474 | pCache->cUtf16PathCollisions = 0;
|
|---|
| 2475 | pCache->cbUtf16Paths = 0;
|
|---|
| 2476 | #endif
|
|---|
| 2477 | return pCache;
|
|---|
| 2478 | }
|
|---|
| 2479 |
|
|---|
| 2480 | kHlpFree(pCache);
|
|---|
| 2481 | }
|
|---|
| 2482 | return NULL;
|
|---|
| 2483 | }
|
|---|
| 2484 |
|
|---|