| 1 | /* $Id: kFsCache.c 2863 2016-09-02 16:32:50Z 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 | * Defined Constants And Macros *
|
|---|
| 56 | *********************************************************************************************************************************/
|
|---|
| 57 | /** @def KFSCACHE_LOG2
|
|---|
| 58 | * More logging. */
|
|---|
| 59 | #if 0
|
|---|
| 60 | # define KFSCACHE_LOG2(a) KFSCACHE_LOG(a)
|
|---|
| 61 | #else
|
|---|
| 62 | # define KFSCACHE_LOG2(a) do { } while (0)
|
|---|
| 63 | #endif
|
|---|
| 64 |
|
|---|
| 65 |
|
|---|
| 66 | /*********************************************************************************************************************************
|
|---|
| 67 | * Structures and Typedefs *
|
|---|
| 68 | *********************************************************************************************************************************/
|
|---|
| 69 | /**
|
|---|
| 70 | * Used by the code re-populating a directory.
|
|---|
| 71 | */
|
|---|
| 72 | typedef struct KFSDIRREPOP
|
|---|
| 73 | {
|
|---|
| 74 | /** The old papChildren array. */
|
|---|
| 75 | PKFSOBJ *papOldChildren;
|
|---|
| 76 | /** Number of children in the array. */
|
|---|
| 77 | KU32 cOldChildren;
|
|---|
| 78 | /** The index into papOldChildren we expect to find the next entry. */
|
|---|
| 79 | KU32 iNextOldChild;
|
|---|
| 80 | /** Add this to iNextOldChild . */
|
|---|
| 81 | KI32 cNextOldChildInc;
|
|---|
| 82 | /** Pointer to the cache (name changes). */
|
|---|
| 83 | PKFSCACHE pCache;
|
|---|
| 84 | } KFSDIRREPOP;
|
|---|
| 85 | /** Pointer to directory re-population data. */
|
|---|
| 86 | typedef KFSDIRREPOP *PKFSDIRREPOP;
|
|---|
| 87 |
|
|---|
| 88 |
|
|---|
| 89 |
|
|---|
| 90 |
|
|---|
| 91 | /**
|
|---|
| 92 | * Retains a reference to a cache object, internal version.
|
|---|
| 93 | *
|
|---|
| 94 | * @returns pObj
|
|---|
| 95 | * @param pObj The object.
|
|---|
| 96 | */
|
|---|
| 97 | K_INLINE PKFSOBJ kFsCacheObjRetainInternal(PKFSOBJ pObj)
|
|---|
| 98 | {
|
|---|
| 99 | KU32 cRefs = ++pObj->cRefs;
|
|---|
| 100 | kHlpAssert(cRefs < 16384);
|
|---|
| 101 | K_NOREF(cRefs);
|
|---|
| 102 | return pObj;
|
|---|
| 103 | }
|
|---|
| 104 |
|
|---|
| 105 |
|
|---|
| 106 | #ifndef NDEBUG
|
|---|
| 107 |
|
|---|
| 108 | /**
|
|---|
| 109 | * Debug printing.
|
|---|
| 110 | * @param pszFormat Debug format string.
|
|---|
| 111 | * @param ... Format argument.
|
|---|
| 112 | */
|
|---|
| 113 | void kFsCacheDbgPrintfV(const char *pszFormat, va_list va)
|
|---|
| 114 | {
|
|---|
| 115 | if (1)
|
|---|
| 116 | {
|
|---|
| 117 | DWORD const dwSavedErr = GetLastError();
|
|---|
| 118 |
|
|---|
| 119 | fprintf(stderr, "debug: ");
|
|---|
| 120 | vfprintf(stderr, pszFormat, va);
|
|---|
| 121 |
|
|---|
| 122 | SetLastError(dwSavedErr);
|
|---|
| 123 | }
|
|---|
| 124 | }
|
|---|
| 125 |
|
|---|
| 126 |
|
|---|
| 127 | /**
|
|---|
| 128 | * Debug printing.
|
|---|
| 129 | * @param pszFormat Debug format string.
|
|---|
| 130 | * @param ... Format argument.
|
|---|
| 131 | */
|
|---|
| 132 | void kFsCacheDbgPrintf(const char *pszFormat, ...)
|
|---|
| 133 | {
|
|---|
| 134 | if (1)
|
|---|
| 135 | {
|
|---|
| 136 | va_list va;
|
|---|
| 137 | va_start(va, pszFormat);
|
|---|
| 138 | kFsCacheDbgPrintfV(pszFormat, va);
|
|---|
| 139 | va_end(va);
|
|---|
| 140 | }
|
|---|
| 141 | }
|
|---|
| 142 |
|
|---|
| 143 | #endif /* !NDEBUG */
|
|---|
| 144 |
|
|---|
| 145 |
|
|---|
| 146 |
|
|---|
| 147 | /**
|
|---|
| 148 | * Hashes a string.
|
|---|
| 149 | *
|
|---|
| 150 | * @returns 32-bit string hash.
|
|---|
| 151 | * @param pszString String to hash.
|
|---|
| 152 | */
|
|---|
| 153 | static KU32 kFsCacheStrHash(const char *pszString)
|
|---|
| 154 | {
|
|---|
| 155 | /* This algorithm was created for sdbm (a public-domain reimplementation of
|
|---|
| 156 | ndbm) database library. it was found to do well in scrambling bits,
|
|---|
| 157 | causing better distribution of the keys and fewer splits. it also happens
|
|---|
| 158 | to be a good general hashing function with good distribution. the actual
|
|---|
| 159 | function is hash(i) = hash(i - 1) * 65599 + str[i]; what is included below
|
|---|
| 160 | is the faster version used in gawk. [there is even a faster, duff-device
|
|---|
| 161 | version] the magic constant 65599 was picked out of thin air while
|
|---|
| 162 | experimenting with different constants, and turns out to be a prime.
|
|---|
| 163 | this is one of the algorithms used in berkeley db (see sleepycat) and
|
|---|
| 164 | elsewhere. */
|
|---|
| 165 | KU32 uHash = 0;
|
|---|
| 166 | KU32 uChar;
|
|---|
| 167 | while ((uChar = (unsigned char)*pszString++) != 0)
|
|---|
| 168 | uHash = uChar + (uHash << 6) + (uHash << 16) - uHash;
|
|---|
| 169 | return uHash;
|
|---|
| 170 | }
|
|---|
| 171 |
|
|---|
| 172 |
|
|---|
| 173 | /**
|
|---|
| 174 | * Hashes a string.
|
|---|
| 175 | *
|
|---|
| 176 | * @returns The string length.
|
|---|
| 177 | * @param pszString String to hash.
|
|---|
| 178 | * @param puHash Where to return the 32-bit string hash.
|
|---|
| 179 | */
|
|---|
| 180 | static KSIZE kFsCacheStrHashEx(const char *pszString, KU32 *puHash)
|
|---|
| 181 | {
|
|---|
| 182 | const char * const pszStart = pszString;
|
|---|
| 183 | KU32 uHash = 0;
|
|---|
| 184 | KU32 uChar;
|
|---|
| 185 | while ((uChar = (unsigned char)*pszString) != 0)
|
|---|
| 186 | {
|
|---|
| 187 | uHash = uChar + (uHash << 6) + (uHash << 16) - uHash;
|
|---|
| 188 | pszString++;
|
|---|
| 189 | }
|
|---|
| 190 | *puHash = uHash;
|
|---|
| 191 | return pszString - pszStart;
|
|---|
| 192 | }
|
|---|
| 193 |
|
|---|
| 194 |
|
|---|
| 195 | /**
|
|---|
| 196 | * Hashes a substring.
|
|---|
| 197 | *
|
|---|
| 198 | * @returns 32-bit substring hash.
|
|---|
| 199 | * @param pchString Pointer to the substring (not terminated).
|
|---|
| 200 | * @param cchString The length of the substring.
|
|---|
| 201 | */
|
|---|
| 202 | static KU32 kFsCacheStrHashN(const char *pszString, KSIZE cchString)
|
|---|
| 203 | {
|
|---|
| 204 | KU32 uHash = 0;
|
|---|
| 205 | while (cchString-- > 0)
|
|---|
| 206 | {
|
|---|
| 207 | KU32 uChar = (unsigned char)*pszString++;
|
|---|
| 208 | uHash = uChar + (uHash << 6) + (uHash << 16) - uHash;
|
|---|
| 209 | }
|
|---|
| 210 | return uHash;
|
|---|
| 211 | }
|
|---|
| 212 |
|
|---|
| 213 |
|
|---|
| 214 | /**
|
|---|
| 215 | * Hashes a UTF-16 string.
|
|---|
| 216 | *
|
|---|
| 217 | * @returns The string length in wchar_t units.
|
|---|
| 218 | * @param pwszString String to hash.
|
|---|
| 219 | * @param puHash Where to return the 32-bit string hash.
|
|---|
| 220 | */
|
|---|
| 221 | static KSIZE kFsCacheUtf16HashEx(const wchar_t *pwszString, KU32 *puHash)
|
|---|
| 222 | {
|
|---|
| 223 | const wchar_t * const pwszStart = pwszString;
|
|---|
| 224 | KU32 uHash = 0;
|
|---|
| 225 | KU32 uChar;
|
|---|
| 226 | while ((uChar = *pwszString) != 0)
|
|---|
| 227 | {
|
|---|
| 228 | uHash = uChar + (uHash << 6) + (uHash << 16) - uHash;
|
|---|
| 229 | pwszString++;
|
|---|
| 230 | }
|
|---|
| 231 | *puHash = uHash;
|
|---|
| 232 | return pwszString - pwszStart;
|
|---|
| 233 | }
|
|---|
| 234 |
|
|---|
| 235 |
|
|---|
| 236 | /**
|
|---|
| 237 | * Hashes a UTF-16 substring.
|
|---|
| 238 | *
|
|---|
| 239 | * @returns 32-bit substring hash.
|
|---|
| 240 | * @param pwcString Pointer to the substring (not terminated).
|
|---|
| 241 | * @param cchString The length of the substring (in wchar_t's).
|
|---|
| 242 | */
|
|---|
| 243 | static KU32 kFsCacheUtf16HashN(const wchar_t *pwcString, KSIZE cwcString)
|
|---|
| 244 | {
|
|---|
| 245 | KU32 uHash = 0;
|
|---|
| 246 | while (cwcString-- > 0)
|
|---|
| 247 | {
|
|---|
| 248 | KU32 uChar = *pwcString++;
|
|---|
| 249 | uHash = uChar + (uHash << 6) + (uHash << 16) - uHash;
|
|---|
| 250 | }
|
|---|
| 251 | return uHash;
|
|---|
| 252 | }
|
|---|
| 253 |
|
|---|
| 254 |
|
|---|
| 255 | /**
|
|---|
| 256 | * For use when kFsCacheIAreEqualW hit's something non-trivial.
|
|---|
| 257 | *
|
|---|
| 258 | * @returns K_TRUE if equal, K_FALSE if different.
|
|---|
| 259 | * @param pwcName1 The first string.
|
|---|
| 260 | * @param pwcName2 The second string.
|
|---|
| 261 | * @param cwcName The length of the two strings (in wchar_t's).
|
|---|
| 262 | */
|
|---|
| 263 | KBOOL kFsCacheIAreEqualSlowW(const wchar_t *pwcName1, const wchar_t *pwcName2, KU16 cwcName)
|
|---|
| 264 | {
|
|---|
| 265 | MY_UNICODE_STRING UniStr1 = { cwcName * sizeof(wchar_t), cwcName * sizeof(wchar_t), (wchar_t *)pwcName1 };
|
|---|
| 266 | MY_UNICODE_STRING UniStr2 = { cwcName * sizeof(wchar_t), cwcName * sizeof(wchar_t), (wchar_t *)pwcName2 };
|
|---|
| 267 | return g_pfnRtlEqualUnicodeString(&UniStr1, &UniStr2, TRUE /*fCaseInsensitive*/);
|
|---|
| 268 | }
|
|---|
| 269 |
|
|---|
| 270 |
|
|---|
| 271 | /**
|
|---|
| 272 | * Compares two UTF-16 strings in a case-insensitive fashion.
|
|---|
| 273 | *
|
|---|
| 274 | * You would think we should be using _wscnicmp here instead, however it is
|
|---|
| 275 | * locale dependent and defaults to ASCII upper/lower handling setlocale hasn't
|
|---|
| 276 | * been called.
|
|---|
| 277 | *
|
|---|
| 278 | * @returns K_TRUE if equal, K_FALSE if different.
|
|---|
| 279 | * @param pwcName1 The first string.
|
|---|
| 280 | * @param pwcName2 The second string.
|
|---|
| 281 | * @param cwcName The length of the two strings (in wchar_t's).
|
|---|
| 282 | */
|
|---|
| 283 | K_INLINE KBOOL kFsCacheIAreEqualW(const wchar_t *pwcName1, const wchar_t *pwcName2, KU32 cwcName)
|
|---|
| 284 | {
|
|---|
| 285 | while (cwcName > 0)
|
|---|
| 286 | {
|
|---|
| 287 | wchar_t wc1 = *pwcName1;
|
|---|
| 288 | wchar_t wc2 = *pwcName2;
|
|---|
| 289 | if (wc1 == wc2)
|
|---|
| 290 | { /* not unlikely */ }
|
|---|
| 291 | else if ( (KU16)wc1 < (KU16)0xc0 /* U+00C0 is the first upper/lower letter after 'z'. */
|
|---|
| 292 | && (KU16)wc2 < (KU16)0xc0)
|
|---|
| 293 | {
|
|---|
| 294 | /* ASCII upper case. */
|
|---|
| 295 | if ((KU16)wc1 - (KU16)0x61 < (KU16)26)
|
|---|
| 296 | wc1 &= ~(wchar_t)0x20;
|
|---|
| 297 | if ((KU16)wc2 - (KU16)0x61 < (KU16)26)
|
|---|
| 298 | wc2 &= ~(wchar_t)0x20;
|
|---|
| 299 | if (wc1 != wc2)
|
|---|
| 300 | return K_FALSE;
|
|---|
| 301 | }
|
|---|
| 302 | else
|
|---|
| 303 | return kFsCacheIAreEqualSlowW(pwcName1, pwcName2, (KU16)cwcName);
|
|---|
| 304 |
|
|---|
| 305 | pwcName2++;
|
|---|
| 306 | pwcName1++;
|
|---|
| 307 | cwcName--;
|
|---|
| 308 | }
|
|---|
| 309 |
|
|---|
| 310 | return K_TRUE;
|
|---|
| 311 | }
|
|---|
| 312 |
|
|---|
| 313 |
|
|---|
| 314 | /**
|
|---|
| 315 | * Looks for '..' in the path.
|
|---|
| 316 | *
|
|---|
| 317 | * @returns K_TRUE if '..' component found, K_FALSE if not.
|
|---|
| 318 | * @param pszPath The path.
|
|---|
| 319 | * @param cchPath The length of the path.
|
|---|
| 320 | */
|
|---|
| 321 | static KBOOL kFsCacheHasDotDotA(const char *pszPath, KSIZE cchPath)
|
|---|
| 322 | {
|
|---|
| 323 | const char *pchDot = (const char *)kHlpMemChr(pszPath, '.', cchPath);
|
|---|
| 324 | while (pchDot)
|
|---|
| 325 | {
|
|---|
| 326 | if (pchDot[1] != '.')
|
|---|
| 327 | {
|
|---|
| 328 | pchDot++;
|
|---|
| 329 | pchDot = (const char *)kHlpMemChr(pchDot, '.', &pszPath[cchPath] - pchDot);
|
|---|
| 330 | }
|
|---|
| 331 | else
|
|---|
| 332 | {
|
|---|
| 333 | char ch;
|
|---|
| 334 | if ( (ch = pchDot[2]) != '\0'
|
|---|
| 335 | && IS_SLASH(ch))
|
|---|
| 336 | {
|
|---|
| 337 | if (pchDot == pszPath)
|
|---|
| 338 | return K_TRUE;
|
|---|
| 339 | ch = pchDot[-1];
|
|---|
| 340 | if ( IS_SLASH(ch)
|
|---|
| 341 | || ch == ':')
|
|---|
| 342 | return K_TRUE;
|
|---|
| 343 | }
|
|---|
| 344 | pchDot = (const char *)kHlpMemChr(pchDot + 2, '.', &pszPath[cchPath] - pchDot - 2);
|
|---|
| 345 | }
|
|---|
| 346 | }
|
|---|
| 347 |
|
|---|
| 348 | return K_FALSE;
|
|---|
| 349 | }
|
|---|
| 350 |
|
|---|
| 351 |
|
|---|
| 352 | /**
|
|---|
| 353 | * Looks for '..' in the path.
|
|---|
| 354 | *
|
|---|
| 355 | * @returns K_TRUE if '..' component found, K_FALSE if not.
|
|---|
| 356 | * @param pwszPath The path.
|
|---|
| 357 | * @param cwcPath The length of the path (in wchar_t's).
|
|---|
| 358 | */
|
|---|
| 359 | static KBOOL kFsCacheHasDotDotW(const wchar_t *pwszPath, KSIZE cwcPath)
|
|---|
| 360 | {
|
|---|
| 361 | const wchar_t *pwcDot = wmemchr(pwszPath, '.', cwcPath);
|
|---|
| 362 | while (pwcDot)
|
|---|
| 363 | {
|
|---|
| 364 | if (pwcDot[1] != '.')
|
|---|
| 365 | {
|
|---|
| 366 | pwcDot++;
|
|---|
| 367 | pwcDot = wmemchr(pwcDot, '.', &pwszPath[cwcPath] - pwcDot);
|
|---|
| 368 | }
|
|---|
| 369 | else
|
|---|
| 370 | {
|
|---|
| 371 | wchar_t wch;
|
|---|
| 372 | if ( (wch = pwcDot[2]) != '\0'
|
|---|
| 373 | && IS_SLASH(wch))
|
|---|
| 374 | {
|
|---|
| 375 | if (pwcDot == pwszPath)
|
|---|
| 376 | return K_TRUE;
|
|---|
| 377 | wch = pwcDot[-1];
|
|---|
| 378 | if ( IS_SLASH(wch)
|
|---|
| 379 | || wch == ':')
|
|---|
| 380 | return K_TRUE;
|
|---|
| 381 | }
|
|---|
| 382 | pwcDot = wmemchr(pwcDot + 2, '.', &pwszPath[cwcPath] - pwcDot - 2);
|
|---|
| 383 | }
|
|---|
| 384 | }
|
|---|
| 385 |
|
|---|
| 386 | return K_FALSE;
|
|---|
| 387 | }
|
|---|
| 388 |
|
|---|
| 389 |
|
|---|
| 390 | /**
|
|---|
| 391 | * Creates an ANSI hash table entry for the given path.
|
|---|
| 392 | *
|
|---|
| 393 | * @returns The hash table entry or NULL if out of memory.
|
|---|
| 394 | * @param pCache The hash
|
|---|
| 395 | * @param pFsObj The resulting object.
|
|---|
| 396 | * @param pszPath The path.
|
|---|
| 397 | * @param cchPath The length of the path.
|
|---|
| 398 | * @param uHashPath The hash of the path.
|
|---|
| 399 | * @param fAbsolute Whether it can be refreshed using an absolute
|
|---|
| 400 | * lookup or requires the slow treatment.
|
|---|
| 401 | * @param idxHashTab The hash table index of the path.
|
|---|
| 402 | * @param enmError The lookup error.
|
|---|
| 403 | */
|
|---|
| 404 | static PKFSHASHA kFsCacheCreatePathHashTabEntryA(PKFSCACHE pCache, PKFSOBJ pFsObj, const char *pszPath, KU32 cchPath,
|
|---|
| 405 | KU32 uHashPath, KU32 idxHashTab, BOOL fAbsolute, KFSLOOKUPERROR enmError)
|
|---|
| 406 | {
|
|---|
| 407 | PKFSHASHA pHashEntry = (PKFSHASHA)kHlpAlloc(sizeof(*pHashEntry) + cchPath + 1);
|
|---|
| 408 | if (pHashEntry)
|
|---|
| 409 | {
|
|---|
| 410 | pHashEntry->uHashPath = uHashPath;
|
|---|
| 411 | pHashEntry->cchPath = (KU16)cchPath;
|
|---|
| 412 | pHashEntry->fAbsolute = fAbsolute;
|
|---|
| 413 | pHashEntry->pFsObj = pFsObj;
|
|---|
| 414 | pHashEntry->enmError = enmError;
|
|---|
| 415 | pHashEntry->pszPath = (const char *)kHlpMemCopy(pHashEntry + 1, pszPath, cchPath + 1);
|
|---|
| 416 | if (pFsObj)
|
|---|
| 417 | pHashEntry->uCacheGen = pCache->uGeneration;
|
|---|
| 418 | else if (enmError != KFSLOOKUPERROR_UNSUPPORTED)
|
|---|
| 419 | pHashEntry->uCacheGen = pCache->uGenerationMissing;
|
|---|
| 420 | else
|
|---|
| 421 | pHashEntry->uCacheGen = KFSOBJ_CACHE_GEN_IGNORE;
|
|---|
| 422 |
|
|---|
| 423 | pHashEntry->pNext = pCache->apAnsiPaths[idxHashTab];
|
|---|
| 424 | pCache->apAnsiPaths[idxHashTab] = pHashEntry;
|
|---|
| 425 |
|
|---|
| 426 | pCache->cbAnsiPaths += sizeof(*pHashEntry) + cchPath + 1;
|
|---|
| 427 | pCache->cAnsiPaths++;
|
|---|
| 428 | if (pHashEntry->pNext)
|
|---|
| 429 | pCache->cAnsiPathCollisions++;
|
|---|
| 430 | }
|
|---|
| 431 | return pHashEntry;
|
|---|
| 432 | }
|
|---|
| 433 |
|
|---|
| 434 |
|
|---|
| 435 | /**
|
|---|
| 436 | * Creates an UTF-16 hash table entry for the given path.
|
|---|
| 437 | *
|
|---|
| 438 | * @returns The hash table entry or NULL if out of memory.
|
|---|
| 439 | * @param pCache The hash
|
|---|
| 440 | * @param pFsObj The resulting object.
|
|---|
| 441 | * @param pwszPath The path.
|
|---|
| 442 | * @param cwcPath The length of the path (in wchar_t's).
|
|---|
| 443 | * @param uHashPath The hash of the path.
|
|---|
| 444 | * @param fAbsolute Whether it can be refreshed using an absolute
|
|---|
| 445 | * lookup or requires the slow treatment.
|
|---|
| 446 | * @param idxHashTab The hash table index of the path.
|
|---|
| 447 | * @param enmError The lookup error.
|
|---|
| 448 | */
|
|---|
| 449 | static PKFSHASHW kFsCacheCreatePathHashTabEntryW(PKFSCACHE pCache, PKFSOBJ pFsObj, const wchar_t *pwszPath, KU32 cwcPath,
|
|---|
| 450 | KU32 uHashPath, KU32 idxHashTab, BOOL fAbsolute, KFSLOOKUPERROR enmError)
|
|---|
| 451 | {
|
|---|
| 452 | PKFSHASHW pHashEntry = (PKFSHASHW)kHlpAlloc(sizeof(*pHashEntry) + (cwcPath + 1) * sizeof(wchar_t));
|
|---|
| 453 | if (pHashEntry)
|
|---|
| 454 | {
|
|---|
| 455 | pHashEntry->uHashPath = uHashPath;
|
|---|
| 456 | pHashEntry->cwcPath = cwcPath;
|
|---|
| 457 | pHashEntry->fAbsolute = fAbsolute;
|
|---|
| 458 | pHashEntry->pFsObj = pFsObj;
|
|---|
| 459 | pHashEntry->enmError = enmError;
|
|---|
| 460 | pHashEntry->pwszPath = (const wchar_t *)kHlpMemCopy(pHashEntry + 1, pwszPath, (cwcPath + 1) * sizeof(wchar_t));
|
|---|
| 461 | if (pFsObj)
|
|---|
| 462 | pHashEntry->uCacheGen = pCache->uGeneration;
|
|---|
| 463 | else if (enmError != KFSLOOKUPERROR_UNSUPPORTED)
|
|---|
| 464 | pHashEntry->uCacheGen = pCache->uGenerationMissing;
|
|---|
| 465 | else
|
|---|
| 466 | pHashEntry->uCacheGen = KFSOBJ_CACHE_GEN_IGNORE;
|
|---|
| 467 |
|
|---|
| 468 | pHashEntry->pNext = pCache->apUtf16Paths[idxHashTab];
|
|---|
| 469 | pCache->apUtf16Paths[idxHashTab] = pHashEntry;
|
|---|
| 470 |
|
|---|
| 471 | pCache->cbUtf16Paths += sizeof(*pHashEntry) + (cwcPath + 1) * sizeof(wchar_t);
|
|---|
| 472 | pCache->cUtf16Paths++;
|
|---|
| 473 | if (pHashEntry->pNext)
|
|---|
| 474 | pCache->cAnsiPathCollisions++;
|
|---|
| 475 | }
|
|---|
| 476 | return pHashEntry;
|
|---|
| 477 | }
|
|---|
| 478 |
|
|---|
| 479 |
|
|---|
| 480 | /**
|
|---|
| 481 | * Links the child in under the parent.
|
|---|
| 482 | *
|
|---|
| 483 | * @returns K_TRUE on success, K_FALSE if out of memory.
|
|---|
| 484 | * @param pParent The parent node.
|
|---|
| 485 | * @param pChild The child node.
|
|---|
| 486 | */
|
|---|
| 487 | static KBOOL kFsCacheDirAddChild(PKFSCACHE pCache, PKFSDIR pParent, PKFSOBJ pChild, KFSLOOKUPERROR *penmError)
|
|---|
| 488 | {
|
|---|
| 489 | if (pParent->cChildren >= pParent->cChildrenAllocated)
|
|---|
| 490 | {
|
|---|
| 491 | void *pvNew = kHlpRealloc(pParent->papChildren, (pParent->cChildrenAllocated + 16) * sizeof(pParent->papChildren[0]));
|
|---|
| 492 | if (!pvNew)
|
|---|
| 493 | return K_FALSE;
|
|---|
| 494 | pParent->papChildren = (PKFSOBJ *)pvNew;
|
|---|
| 495 | pParent->cChildrenAllocated += 16;
|
|---|
| 496 | pCache->cbObjects += 16 * sizeof(pParent->papChildren[0]);
|
|---|
| 497 | }
|
|---|
| 498 | pParent->papChildren[pParent->cChildren++] = kFsCacheObjRetainInternal(pChild);
|
|---|
| 499 | return K_TRUE;
|
|---|
| 500 | }
|
|---|
| 501 |
|
|---|
| 502 |
|
|---|
| 503 | /**
|
|---|
| 504 | * Creates a new cache object.
|
|---|
| 505 | *
|
|---|
| 506 | * @returns Pointer (with 1 reference) to the new object. The object will not
|
|---|
| 507 | * be linked to the parent directory yet.
|
|---|
| 508 | *
|
|---|
| 509 | * NULL if we're out of memory.
|
|---|
| 510 | *
|
|---|
| 511 | * @param pCache The cache.
|
|---|
| 512 | * @param pParent The parent directory.
|
|---|
| 513 | * @param pszName The ANSI name.
|
|---|
| 514 | * @param cchName The length of the ANSI name.
|
|---|
| 515 | * @param pwszName The UTF-16 name.
|
|---|
| 516 | * @param cwcName The length of the UTF-16 name.
|
|---|
| 517 | * @param pszShortName The ANSI short name, NULL if none.
|
|---|
| 518 | * @param cchShortName The length of the ANSI short name, 0 if none.
|
|---|
| 519 | * @param pwszShortName The UTF-16 short name, NULL if none.
|
|---|
| 520 | * @param cwcShortName The length of the UTF-16 short name, 0 if none.
|
|---|
| 521 | * @param bObjType The objct type.
|
|---|
| 522 | * @param penmError Where to explain failures.
|
|---|
| 523 | */
|
|---|
| 524 | PKFSOBJ kFsCacheCreateObject(PKFSCACHE pCache, PKFSDIR pParent,
|
|---|
| 525 | char const *pszName, KU16 cchName, wchar_t const *pwszName, KU16 cwcName,
|
|---|
| 526 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 527 | char const *pszShortName, KU16 cchShortName, wchar_t const *pwszShortName, KU16 cwcShortName,
|
|---|
| 528 | #endif
|
|---|
| 529 | KU8 bObjType, KFSLOOKUPERROR *penmError)
|
|---|
| 530 | {
|
|---|
| 531 | /*
|
|---|
| 532 | * Allocate the object.
|
|---|
| 533 | */
|
|---|
| 534 | KBOOL const fDirish = bObjType != KFSOBJ_TYPE_FILE && bObjType != KFSOBJ_TYPE_OTHER;
|
|---|
| 535 | KSIZE const cbObj = fDirish ? sizeof(KFSDIR) : sizeof(KFSOBJ);
|
|---|
| 536 | KSIZE const cbNames = (cwcName + 1) * sizeof(wchar_t) + cchName + 1
|
|---|
| 537 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 538 | + (cwcShortName > 0 ? (cwcShortName + 1) * sizeof(wchar_t) + cchShortName + 1 : 0)
|
|---|
| 539 | #endif
|
|---|
| 540 | ;
|
|---|
| 541 | PKFSOBJ pObj;
|
|---|
| 542 | kHlpAssert(pCache->u32Magic == KFSCACHE_MAGIC);
|
|---|
| 543 |
|
|---|
| 544 | pObj = (PKFSOBJ)kHlpAlloc(cbObj + cbNames);
|
|---|
| 545 | if (pObj)
|
|---|
| 546 | {
|
|---|
| 547 | KU8 *pbExtra = (KU8 *)pObj + cbObj;
|
|---|
| 548 |
|
|---|
| 549 | pCache->cbObjects += cbObj + cbNames;
|
|---|
| 550 | pCache->cObjects++;
|
|---|
| 551 |
|
|---|
| 552 | /*
|
|---|
| 553 | * Initialize the object.
|
|---|
| 554 | */
|
|---|
| 555 | pObj->u32Magic = KFSOBJ_MAGIC;
|
|---|
| 556 | pObj->cRefs = 1;
|
|---|
| 557 | pObj->uCacheGen = bObjType != KFSOBJ_TYPE_MISSING ? pCache->uGeneration : pCache->uGenerationMissing;
|
|---|
| 558 | pObj->bObjType = bObjType;
|
|---|
| 559 | pObj->fHaveStats = K_FALSE;
|
|---|
| 560 | pObj->abUnused[0] = K_FALSE;
|
|---|
| 561 | pObj->abUnused[1] = K_FALSE;
|
|---|
| 562 | pObj->fFlags = pParent->Obj.fFlags;
|
|---|
| 563 | pObj->pParent = pParent;
|
|---|
| 564 | pObj->pUserDataHead = NULL;
|
|---|
| 565 |
|
|---|
| 566 | #ifdef KFSCACHE_CFG_UTF16
|
|---|
| 567 | pObj->cwcParent = pParent->Obj.cwcParent + pParent->Obj.cwcName + !!pParent->Obj.cwcName;
|
|---|
| 568 | pObj->pwszName = (wchar_t *)kHlpMemCopy(pbExtra, pwszName, cwcName * sizeof(wchar_t));
|
|---|
| 569 | pObj->cwcName = cwcName;
|
|---|
| 570 | pbExtra += cwcName * sizeof(wchar_t);
|
|---|
| 571 | *pbExtra++ = '\0';
|
|---|
| 572 | *pbExtra++ = '\0';
|
|---|
| 573 | # ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 574 | pObj->cwcShortParent = pParent->Obj.cwcShortParent + pParent->Obj.cwcShortName + !!pParent->Obj.cwcShortName;
|
|---|
| 575 | if (cwcShortName)
|
|---|
| 576 | {
|
|---|
| 577 | pObj->pwszShortName = (wchar_t *)kHlpMemCopy(pbExtra, pwszShortName, cwcShortName * sizeof(wchar_t));
|
|---|
| 578 | pObj->cwcShortName = cwcShortName;
|
|---|
| 579 | pbExtra += cwcShortName * sizeof(wchar_t);
|
|---|
| 580 | *pbExtra++ = '\0';
|
|---|
| 581 | *pbExtra++ = '\0';
|
|---|
| 582 | }
|
|---|
| 583 | else
|
|---|
| 584 | {
|
|---|
| 585 | pObj->pwszShortName = pObj->pwszName;
|
|---|
| 586 | pObj->cwcShortName = cwcName;
|
|---|
| 587 | }
|
|---|
| 588 | # endif
|
|---|
| 589 | #endif
|
|---|
| 590 | pObj->cchParent = pParent->Obj.cchParent + pParent->Obj.cchName + !!pParent->Obj.cchName;
|
|---|
| 591 | pObj->pszName = (char *)kHlpMemCopy(pbExtra, pszName, cchName);
|
|---|
| 592 | pObj->cchName = cchName;
|
|---|
| 593 | pbExtra += cchName;
|
|---|
| 594 | *pbExtra++ = '\0';
|
|---|
| 595 | # ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 596 | pObj->cchShortParent = pParent->Obj.cchShortParent + pParent->Obj.cchShortName + !!pParent->Obj.cchShortName;
|
|---|
| 597 | if (cchShortName)
|
|---|
| 598 | {
|
|---|
| 599 | pObj->pszShortName = (char *)kHlpMemCopy(pbExtra, pszShortName, cchShortName);
|
|---|
| 600 | pObj->cchShortName = cchShortName;
|
|---|
| 601 | pbExtra += cchShortName;
|
|---|
| 602 | *pbExtra++ = '\0';
|
|---|
| 603 | }
|
|---|
| 604 | else
|
|---|
| 605 | {
|
|---|
| 606 | pObj->pszShortName = pObj->pszName;
|
|---|
| 607 | pObj->cchShortName = cchName;
|
|---|
| 608 | }
|
|---|
| 609 | #endif
|
|---|
| 610 | kHlpAssert(pbExtra - (KU8 *)pObj == cbObj);
|
|---|
| 611 |
|
|---|
| 612 | /*
|
|---|
| 613 | * Type specific initilization.
|
|---|
| 614 | */
|
|---|
| 615 | if (fDirish)
|
|---|
| 616 | {
|
|---|
| 617 | PKFSDIR pDirObj = (PKFSDIR)pObj;
|
|---|
| 618 | pDirObj->cChildren = 0;
|
|---|
| 619 | pDirObj->cChildrenAllocated = 0;
|
|---|
| 620 | pDirObj->papChildren = NULL;
|
|---|
| 621 | pDirObj->cHashTab = 0;
|
|---|
| 622 | pDirObj->paHashTab = NULL;
|
|---|
| 623 | pDirObj->hDir = INVALID_HANDLE_VALUE;
|
|---|
| 624 | pDirObj->uDevNo = pParent->uDevNo;
|
|---|
| 625 | pDirObj->iLastWrite = 0;
|
|---|
| 626 | pDirObj->fPopulated = K_FALSE;
|
|---|
| 627 | }
|
|---|
| 628 | }
|
|---|
| 629 | else
|
|---|
| 630 | *penmError = KFSLOOKUPERROR_OUT_OF_MEMORY;
|
|---|
| 631 | return pObj;
|
|---|
| 632 | }
|
|---|
| 633 |
|
|---|
| 634 |
|
|---|
| 635 | /**
|
|---|
| 636 | * Creates a new object given wide char names.
|
|---|
| 637 | *
|
|---|
| 638 | * This function just converts the paths and calls kFsCacheCreateObject.
|
|---|
| 639 | *
|
|---|
| 640 | *
|
|---|
| 641 | * @returns Pointer (with 1 reference) to the new object. The object will not
|
|---|
| 642 | * be linked to the parent directory yet.
|
|---|
| 643 | *
|
|---|
| 644 | * NULL if we're out of memory.
|
|---|
| 645 | *
|
|---|
| 646 | * @param pCache The cache.
|
|---|
| 647 | * @param pParent The parent directory.
|
|---|
| 648 | * @param pszName The ANSI name.
|
|---|
| 649 | * @param cchName The length of the ANSI name.
|
|---|
| 650 | * @param pwszName The UTF-16 name.
|
|---|
| 651 | * @param cwcName The length of the UTF-16 name.
|
|---|
| 652 | * @param pwszShortName The UTF-16 short name, NULL if none.
|
|---|
| 653 | * @param cwcShortName The length of the UTF-16 short name, 0 if none.
|
|---|
| 654 | * @param bObjType The objct type.
|
|---|
| 655 | * @param penmError Where to explain failures.
|
|---|
| 656 | */
|
|---|
| 657 | PKFSOBJ kFsCacheCreateObjectW(PKFSCACHE pCache, PKFSDIR pParent, wchar_t const *pwszName, KU32 cwcName,
|
|---|
| 658 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 659 | wchar_t const *pwszShortName, KU32 cwcShortName,
|
|---|
| 660 | #endif
|
|---|
| 661 | KU8 bObjType, KFSLOOKUPERROR *penmError)
|
|---|
| 662 | {
|
|---|
| 663 | /* Convert names to ANSI first so we know their lengths. */
|
|---|
| 664 | char szName[KFSCACHE_CFG_MAX_ANSI_NAME];
|
|---|
| 665 | int cchName = WideCharToMultiByte(CP_ACP, 0, pwszName, cwcName, szName, sizeof(szName) - 1, NULL, NULL);
|
|---|
| 666 | if (cchName >= 0)
|
|---|
| 667 | {
|
|---|
| 668 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 669 | char szShortName[12*3 + 1];
|
|---|
| 670 | int cchShortName = 0;
|
|---|
| 671 | if ( cwcShortName == 0
|
|---|
| 672 | || (cchShortName = WideCharToMultiByte(CP_ACP, 0, pwszShortName, cwcShortName,
|
|---|
| 673 | szShortName, sizeof(szShortName) - 1, NULL, NULL)) > 0)
|
|---|
| 674 | #endif
|
|---|
| 675 | {
|
|---|
| 676 | return kFsCacheCreateObject(pCache, pParent,
|
|---|
| 677 | szName, cchName, pwszName, cwcName,
|
|---|
| 678 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 679 | szShortName, cchShortName, pwszShortName, cwcShortName,
|
|---|
| 680 | #endif
|
|---|
| 681 | bObjType, penmError);
|
|---|
| 682 | }
|
|---|
| 683 | }
|
|---|
| 684 | *penmError = KFSLOOKUPERROR_ANSI_CONVERSION_ERROR;
|
|---|
| 685 | return NULL;
|
|---|
| 686 | }
|
|---|
| 687 |
|
|---|
| 688 |
|
|---|
| 689 | /**
|
|---|
| 690 | * Creates a missing object.
|
|---|
| 691 | *
|
|---|
| 692 | * This is used for caching negative results.
|
|---|
| 693 | *
|
|---|
| 694 | * @returns Pointer to the newly created object on success (already linked into
|
|---|
| 695 | * pParent). No reference.
|
|---|
| 696 | *
|
|---|
| 697 | * NULL on failure.
|
|---|
| 698 | *
|
|---|
| 699 | * @param pCache The cache.
|
|---|
| 700 | * @param pParent The parent directory.
|
|---|
| 701 | * @param pchName The name.
|
|---|
| 702 | * @param cchName The length of the name.
|
|---|
| 703 | * @param penmError Where to return failure explanations.
|
|---|
| 704 | */
|
|---|
| 705 | static PKFSOBJ kFsCacheCreateMissingA(PKFSCACHE pCache, PKFSDIR pParent, const char *pchName, KU32 cchName,
|
|---|
| 706 | KFSLOOKUPERROR *penmError)
|
|---|
| 707 | {
|
|---|
| 708 | /*
|
|---|
| 709 | * Just convert the name to UTF-16 and call kFsCacheCreateObject to do the job.
|
|---|
| 710 | */
|
|---|
| 711 | wchar_t wszName[KFSCACHE_CFG_MAX_PATH];
|
|---|
| 712 | int cwcName = MultiByteToWideChar(CP_ACP, 0, pchName, cchName, wszName, KFSCACHE_CFG_MAX_UTF16_NAME - 1);
|
|---|
| 713 | if (cwcName > 0)
|
|---|
| 714 | {
|
|---|
| 715 | /** @todo check that it actually doesn't exists before we add it. We should not
|
|---|
| 716 | * trust the directory enumeration here, or maybe we should?? */
|
|---|
| 717 |
|
|---|
| 718 | PKFSOBJ pMissing = kFsCacheCreateObject(pCache, pParent, pchName, cchName, wszName, cwcName,
|
|---|
| 719 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 720 | NULL, 0, NULL, 0,
|
|---|
| 721 | #endif
|
|---|
| 722 | KFSOBJ_TYPE_MISSING, penmError);
|
|---|
| 723 | if (pMissing)
|
|---|
| 724 | {
|
|---|
| 725 | KBOOL fRc = kFsCacheDirAddChild(pCache, pParent, pMissing, penmError);
|
|---|
| 726 | kFsCacheObjRelease(pCache, pMissing);
|
|---|
| 727 | return fRc ? pMissing : NULL;
|
|---|
| 728 | }
|
|---|
| 729 | return NULL;
|
|---|
| 730 | }
|
|---|
| 731 | *penmError = KFSLOOKUPERROR_UTF16_CONVERSION_ERROR;
|
|---|
| 732 | return NULL;
|
|---|
| 733 | }
|
|---|
| 734 |
|
|---|
| 735 |
|
|---|
| 736 | /**
|
|---|
| 737 | * Creates a missing object, UTF-16 version.
|
|---|
| 738 | *
|
|---|
| 739 | * This is used for caching negative results.
|
|---|
| 740 | *
|
|---|
| 741 | * @returns Pointer to the newly created object on success (already linked into
|
|---|
| 742 | * pParent). No reference.
|
|---|
| 743 | *
|
|---|
| 744 | * NULL on failure.
|
|---|
| 745 | *
|
|---|
| 746 | * @param pCache The cache.
|
|---|
| 747 | * @param pParent The parent directory.
|
|---|
| 748 | * @param pwcName The name.
|
|---|
| 749 | * @param cwcName The length of the name.
|
|---|
| 750 | * @param penmError Where to return failure explanations.
|
|---|
| 751 | */
|
|---|
| 752 | static PKFSOBJ kFsCacheCreateMissingW(PKFSCACHE pCache, PKFSDIR pParent, const wchar_t *pwcName, KU32 cwcName,
|
|---|
| 753 | KFSLOOKUPERROR *penmError)
|
|---|
| 754 | {
|
|---|
| 755 | /** @todo check that it actually doesn't exists before we add it. We should not
|
|---|
| 756 | * trust the directory enumeration here, or maybe we should?? */
|
|---|
| 757 | PKFSOBJ pMissing = kFsCacheCreateObjectW(pCache, pParent, pwcName, cwcName,
|
|---|
| 758 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 759 | NULL, 0,
|
|---|
| 760 | #endif
|
|---|
| 761 | KFSOBJ_TYPE_MISSING, penmError);
|
|---|
| 762 | if (pMissing)
|
|---|
| 763 | {
|
|---|
| 764 | KBOOL fRc = kFsCacheDirAddChild(pCache, pParent, pMissing, penmError);
|
|---|
| 765 | kFsCacheObjRelease(pCache, pMissing);
|
|---|
| 766 | return fRc ? pMissing : NULL;
|
|---|
| 767 | }
|
|---|
| 768 | return NULL;
|
|---|
| 769 | }
|
|---|
| 770 |
|
|---|
| 771 | /**
|
|---|
| 772 | * Worker for kFsCacheDirFindOldChild that refreshes the file ID value on an
|
|---|
| 773 | * object found by name.
|
|---|
| 774 | *
|
|---|
| 775 | * @returns Pointer to the existing object if found, NULL if not.
|
|---|
| 776 | * @param pDirRePop Repopulation data.
|
|---|
| 777 | * @param pCur The object to check the names of.
|
|---|
| 778 | * @param idFile The file ID.
|
|---|
| 779 | */
|
|---|
| 780 | static PKFSOBJ kFsCacheDirRefreshOldChildFileId(PKFSDIRREPOP pDirRePop, PKFSOBJ pCur, KI64 idFile)
|
|---|
| 781 | {
|
|---|
| 782 | KFSCACHE_LOG(("Refreshing %s/%s/ - %s changed file ID from %#llx -> %#llx...\n",
|
|---|
| 783 | pCur->pParent->Obj.pParent->Obj.pszName, pCur->pParent->Obj.pszName, pCur->pszName,
|
|---|
| 784 | pCur->Stats.st_ino, idFile));
|
|---|
| 785 | pCur->Stats.st_ino = idFile;
|
|---|
| 786 | /** @todo inform user data items... */
|
|---|
| 787 | return pCur;
|
|---|
| 788 | }
|
|---|
| 789 |
|
|---|
| 790 |
|
|---|
| 791 | /**
|
|---|
| 792 | * Worker for kFsCacheDirFindOldChild that checks the names after an old object
|
|---|
| 793 | * has been found the file ID.
|
|---|
| 794 | *
|
|---|
| 795 | * @returns Pointer to the existing object if found, NULL if not.
|
|---|
| 796 | * @param pDirRePop Repopulation data.
|
|---|
| 797 | * @param pCur The object to check the names of.
|
|---|
| 798 | * @param pwcName The file name.
|
|---|
| 799 | * @param cwcName The length of the filename (in wchar_t's).
|
|---|
| 800 | * @param pwcShortName The short name, if present.
|
|---|
| 801 | * @param cwcShortName The length of the short name (in wchar_t's).
|
|---|
| 802 | */
|
|---|
| 803 | static PKFSOBJ kFsCacheDirRefreshOldChildName(PKFSDIRREPOP pDirRePop, PKFSOBJ pCur, wchar_t const *pwcName, KU32 cwcName
|
|---|
| 804 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 805 | , wchar_t const *pwcShortName, KU32 cwcShortName
|
|---|
| 806 | #endif
|
|---|
| 807 | )
|
|---|
| 808 | {
|
|---|
| 809 | __debugbreak();
|
|---|
| 810 | /** @todo implement this. It's not entirely straight forward, especially if
|
|---|
| 811 | * the name increases! Also, it's something that may happend during
|
|---|
| 812 | * individual object refresh and we might want to share code... */
|
|---|
| 813 |
|
|---|
| 814 | return pCur;
|
|---|
| 815 | }
|
|---|
| 816 |
|
|---|
| 817 |
|
|---|
| 818 | /**
|
|---|
| 819 | * Worker for kFsCacheDirFindOldChild that checks the names after an old object
|
|---|
| 820 | * has been found the file ID.
|
|---|
| 821 | *
|
|---|
| 822 | * @returns Pointer to the existing object if found, NULL if not.
|
|---|
| 823 | * @param pDirRePop Repopulation data.
|
|---|
| 824 | * @param pCur The object to check the names of.
|
|---|
| 825 | * @param pwcName The file name.
|
|---|
| 826 | * @param cwcName The length of the filename (in wchar_t's).
|
|---|
| 827 | * @param pwcShortName The short name, if present.
|
|---|
| 828 | * @param cwcShortName The length of the short name (in wchar_t's).
|
|---|
| 829 | */
|
|---|
| 830 | K_INLINE PKFSOBJ kFsCacheDirCheckOldChildName(PKFSDIRREPOP pDirRePop, PKFSOBJ pCur, wchar_t const *pwcName, KU32 cwcName
|
|---|
| 831 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 832 | , wchar_t const *pwcShortName, KU32 cwcShortName
|
|---|
| 833 | #endif
|
|---|
| 834 | )
|
|---|
| 835 | {
|
|---|
| 836 | if ( pCur->cwcName == cwcName
|
|---|
| 837 | && kHlpMemComp(pCur->pwszName, pwcName, cwcName * sizeof(wchar_t)) == 0)
|
|---|
| 838 | {
|
|---|
| 839 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 840 | if (cwcShortName == 0
|
|---|
| 841 | ? pCur->pwszShortName == pCur->pwszName
|
|---|
| 842 | || ( pCur->cwcShortName == cwcName
|
|---|
| 843 | && kHlpMemComp(pCur->pwszShortName, pCur->pwszName, cwcName * sizeof(wchar_t)) == 0)
|
|---|
| 844 | : pCur->cwcShortName == cwcShortName
|
|---|
| 845 | && kHlpMemComp(pCur->pwszShortName, pwcShortName, cwcShortName * sizeof(wchar_t)) == 0 )
|
|---|
| 846 | #endif
|
|---|
| 847 | {
|
|---|
| 848 | return pCur;
|
|---|
| 849 | }
|
|---|
| 850 | }
|
|---|
| 851 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 852 | return kFsCacheDirRefreshOldChildName(pDirRePop, pCur, pwcName, cwcName, pwcShortName, cwcShortName);
|
|---|
| 853 | #else
|
|---|
| 854 | return kFsCacheDirRefreshOldChildName(pDirRePop, pCur, pwcName, cwcName);
|
|---|
| 855 | #endif
|
|---|
| 856 | }
|
|---|
| 857 |
|
|---|
| 858 |
|
|---|
| 859 | /**
|
|---|
| 860 | * Worker for kFsCachePopuplateOrRefreshDir that locates an old child object
|
|---|
| 861 | * while re-populating a directory.
|
|---|
| 862 | *
|
|---|
| 863 | * @returns Pointer to the existing object if found, NULL if not.
|
|---|
| 864 | * @param pDirRePop Repopulation data.
|
|---|
| 865 | * @param idFile The file ID, 0 if none.
|
|---|
| 866 | * @param pwcName The file name.
|
|---|
| 867 | * @param cwcName The length of the filename (in wchar_t's).
|
|---|
| 868 | * @param pwcShortName The short name, if present.
|
|---|
| 869 | * @param cwcShortName The length of the short name (in wchar_t's).
|
|---|
| 870 | */
|
|---|
| 871 | static PKFSOBJ kFsCacheDirFindOldChildSlow(PKFSDIRREPOP pDirRePop, KI64 idFile, wchar_t const *pwcName, KU32 cwcName
|
|---|
| 872 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 873 | , wchar_t const *pwcShortName, KU32 cwcShortName
|
|---|
| 874 | #endif
|
|---|
| 875 | )
|
|---|
| 876 | {
|
|---|
| 877 | KU32 cOldChildren = pDirRePop->cOldChildren;
|
|---|
| 878 | KU32 const iNextOldChild = K_MIN(pDirRePop->iNextOldChild, cOldChildren - 1);
|
|---|
| 879 | KU32 iCur;
|
|---|
| 880 | KI32 cInc;
|
|---|
| 881 | KI32 cDirLefts;
|
|---|
| 882 |
|
|---|
| 883 | kHlpAssertReturn(cOldChildren > 0, NULL);
|
|---|
| 884 |
|
|---|
| 885 | /*
|
|---|
| 886 | * Search by file ID first, if we've got one.
|
|---|
| 887 | * ASSUMES that KU32 wraps around when -1 is added to 0.
|
|---|
| 888 | */
|
|---|
| 889 | if ( idFile != 0
|
|---|
| 890 | && idFile != KI64_MAX
|
|---|
| 891 | && idFile != KI64_MIN)
|
|---|
| 892 | {
|
|---|
| 893 | cInc = pDirRePop->cNextOldChildInc;
|
|---|
| 894 | kHlpAssert(cInc == -1 || cInc == 1);
|
|---|
| 895 | for (cDirLefts = 2; cDirLefts > 0; cDirLefts--)
|
|---|
| 896 | {
|
|---|
| 897 | for (iCur = iNextOldChild; iCur < cOldChildren; iCur += cInc)
|
|---|
| 898 | {
|
|---|
| 899 | PKFSOBJ pCur = pDirRePop->papOldChildren[iCur];
|
|---|
| 900 | if (pCur->Stats.st_ino == idFile)
|
|---|
| 901 | {
|
|---|
| 902 | /* Remove it and check the name. */
|
|---|
| 903 | pDirRePop->cOldChildren = --cOldChildren;
|
|---|
| 904 | if (iCur < cOldChildren)
|
|---|
| 905 | pDirRePop->papOldChildren[iCur] = pDirRePop->papOldChildren[cOldChildren];
|
|---|
| 906 | else
|
|---|
| 907 | cInc = -1;
|
|---|
| 908 | pDirRePop->cNextOldChildInc = cInc;
|
|---|
| 909 | pDirRePop->iNextOldChild = iCur + cInc;
|
|---|
| 910 |
|
|---|
| 911 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 912 | return kFsCacheDirCheckOldChildName(pDirRePop, pCur, pwcName, cwcName, pwcShortName, cwcShortName);
|
|---|
| 913 | #else
|
|---|
| 914 | return kFsCacheDirCheckOldChildName(pDirRePop, pCur, pwcName, cwcName, pwcShortName, cwcShortName);
|
|---|
| 915 | #endif
|
|---|
| 916 | }
|
|---|
| 917 | }
|
|---|
| 918 | cInc = -cInc;
|
|---|
| 919 | }
|
|---|
| 920 | }
|
|---|
| 921 |
|
|---|
| 922 | /*
|
|---|
| 923 | * Search by name.
|
|---|
| 924 | * ASSUMES that KU32 wraps around when -1 is added to 0.
|
|---|
| 925 | */
|
|---|
| 926 | cInc = pDirRePop->cNextOldChildInc;
|
|---|
| 927 | kHlpAssert(cInc == -1 || cInc == 1);
|
|---|
| 928 | for (cDirLefts = 2; cDirLefts > 0; cDirLefts--)
|
|---|
| 929 | {
|
|---|
| 930 | for (iCur = iNextOldChild; iCur < cOldChildren; iCur += cInc)
|
|---|
| 931 | {
|
|---|
| 932 | PKFSOBJ pCur = pDirRePop->papOldChildren[iCur];
|
|---|
| 933 | if ( ( pCur->cwcName == cwcName
|
|---|
| 934 | && kFsCacheIAreEqualW(pCur->pwszName, pwcName, cwcName))
|
|---|
| 935 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 936 | || ( pCur->cwcShortName == cwcName
|
|---|
| 937 | && pCur->pwszShortName != pCur->pwszName
|
|---|
| 938 | && kFsCacheIAreEqualW(pCur->pwszShortName, pwcName, cwcName))
|
|---|
| 939 | #endif
|
|---|
| 940 | )
|
|---|
| 941 | {
|
|---|
| 942 | /* Do this first so the compiler can share the rest with the above file ID return. */
|
|---|
| 943 | if (pCur->Stats.st_ino == idFile)
|
|---|
| 944 | { /* likely */ }
|
|---|
| 945 | else
|
|---|
| 946 | pCur = kFsCacheDirRefreshOldChildFileId(pDirRePop, pCur, idFile);
|
|---|
| 947 |
|
|---|
| 948 | /* Remove it and check the name. */
|
|---|
| 949 | pDirRePop->cOldChildren = --cOldChildren;
|
|---|
| 950 | if (iCur < cOldChildren)
|
|---|
| 951 | pDirRePop->papOldChildren[iCur] = pDirRePop->papOldChildren[cOldChildren];
|
|---|
| 952 | else
|
|---|
| 953 | cInc = -1;
|
|---|
| 954 | pDirRePop->cNextOldChildInc = cInc;
|
|---|
| 955 | pDirRePop->iNextOldChild = iCur + cInc;
|
|---|
| 956 |
|
|---|
| 957 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 958 | return kFsCacheDirCheckOldChildName(pDirRePop, pCur, pwcName, cwcName, pwcShortName, cwcShortName);
|
|---|
| 959 | #else
|
|---|
| 960 | return kFsCacheDirCheckOldChildName(pDirRePop, pCur, pwcName, cwcName, pwcShortName, cwcShortName);
|
|---|
| 961 | #endif
|
|---|
| 962 | }
|
|---|
| 963 | }
|
|---|
| 964 | cInc = -cInc;
|
|---|
| 965 | }
|
|---|
| 966 |
|
|---|
| 967 | return NULL;
|
|---|
| 968 | }
|
|---|
| 969 |
|
|---|
| 970 |
|
|---|
| 971 |
|
|---|
| 972 | /**
|
|---|
| 973 | * Worker for kFsCachePopuplateOrRefreshDir that locates an old child object
|
|---|
| 974 | * while re-populating a directory.
|
|---|
| 975 | *
|
|---|
| 976 | * @returns Pointer to the existing object if found, NULL if not.
|
|---|
| 977 | * @param pDirRePop Repopulation data.
|
|---|
| 978 | * @param idFile The file ID, 0 if none.
|
|---|
| 979 | * @param pwcName The file name.
|
|---|
| 980 | * @param cwcName The length of the filename (in wchar_t's).
|
|---|
| 981 | * @param pwcShortName The short name, if present.
|
|---|
| 982 | * @param cwcShortName The length of the short name (in wchar_t's).
|
|---|
| 983 | */
|
|---|
| 984 | K_INLINE PKFSOBJ kFsCacheDirFindOldChild(PKFSDIRREPOP pDirRePop, KI64 idFile, wchar_t const *pwcName, KU32 cwcName
|
|---|
| 985 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 986 | , wchar_t const *pwcShortName, KU32 cwcShortName
|
|---|
| 987 | #endif
|
|---|
| 988 | )
|
|---|
| 989 | {
|
|---|
| 990 | /*
|
|---|
| 991 | * We only check the iNextOldChild element here, hoping that the compiler
|
|---|
| 992 | * will actually inline this code, letting the slow version of the function
|
|---|
| 993 | * do the rest.
|
|---|
| 994 | */
|
|---|
| 995 | KU32 cOldChildren = pDirRePop->cOldChildren;
|
|---|
| 996 | if (cOldChildren > 0)
|
|---|
| 997 | {
|
|---|
| 998 | KU32 const iNextOldChild = K_MIN(pDirRePop->iNextOldChild, cOldChildren);
|
|---|
| 999 | PKFSOBJ pCur = pDirRePop->papOldChildren[iNextOldChild];
|
|---|
| 1000 |
|
|---|
| 1001 | if ( pCur->Stats.st_ino == idFile
|
|---|
| 1002 | && idFile != 0
|
|---|
| 1003 | && idFile != KI64_MAX
|
|---|
| 1004 | && idFile != KI64_MIN)
|
|---|
| 1005 | pCur = kFsCacheDirCheckOldChildName(pDirRePop, pCur, pwcName, cwcName, pwcShortName, cwcShortName);
|
|---|
| 1006 | else if ( pCur->cwcName == cwcName
|
|---|
| 1007 | && kHlpMemComp(pCur->pwszName, pwcName, cwcName * sizeof(wchar_t)) == 0)
|
|---|
| 1008 | {
|
|---|
| 1009 | if (pCur->Stats.st_ino == idFile)
|
|---|
| 1010 | { /* likely */ }
|
|---|
| 1011 | else
|
|---|
| 1012 | pCur = kFsCacheDirRefreshOldChildFileId(pDirRePop, pCur, idFile);
|
|---|
| 1013 |
|
|---|
| 1014 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1015 | if (cwcShortName == 0
|
|---|
| 1016 | ? pCur->pwszShortName == pCur->pwszName
|
|---|
| 1017 | || ( pCur->cwcShortName == cwcName
|
|---|
| 1018 | && kHlpMemComp(pCur->pwszShortName, pCur->pwszName, cwcName * sizeof(wchar_t)) == 0)
|
|---|
| 1019 | : pCur->cwcShortName == cwcShortName
|
|---|
| 1020 | && kHlpMemComp(pCur->pwszShortName, pwcShortName, cwcShortName * sizeof(wchar_t)) == 0 )
|
|---|
| 1021 | { /* likely */ }
|
|---|
| 1022 | else
|
|---|
| 1023 | pCur = kFsCacheDirRefreshOldChildName(pDirRePop, pCur, pwcName, cwcName, pwcShortName, cwcShortName);
|
|---|
| 1024 | #endif
|
|---|
| 1025 | }
|
|---|
| 1026 | else
|
|---|
| 1027 | pCur = NULL;
|
|---|
| 1028 | if (pCur)
|
|---|
| 1029 | {
|
|---|
| 1030 | /*
|
|---|
| 1031 | * Got a match. Remove the child from the array, replacing it with
|
|---|
| 1032 | * the last element. (This means we're reversing the second half of
|
|---|
| 1033 | * the elements, which is why we need cNextOldChildInc.)
|
|---|
| 1034 | */
|
|---|
| 1035 | pDirRePop->cOldChildren = --cOldChildren;
|
|---|
| 1036 | if (iNextOldChild < cOldChildren)
|
|---|
| 1037 | pDirRePop->papOldChildren[iNextOldChild] = pDirRePop->papOldChildren[cOldChildren];
|
|---|
| 1038 | pDirRePop->iNextOldChild = iNextOldChild + pDirRePop->cNextOldChildInc;
|
|---|
| 1039 | return pCur;
|
|---|
| 1040 | }
|
|---|
| 1041 |
|
|---|
| 1042 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1043 | return kFsCacheDirFindOldChildSlow(pDirRePop, idFile, pwcName, cwcName, pwcShortName, cwcShortName);
|
|---|
| 1044 | #else
|
|---|
| 1045 | return kFsCacheDirFindOldChildSlow(pDirRePop, idFile, pwcName, cwcName);
|
|---|
| 1046 | #endif
|
|---|
| 1047 | }
|
|---|
| 1048 |
|
|---|
| 1049 | return NULL;
|
|---|
| 1050 | }
|
|---|
| 1051 |
|
|---|
| 1052 |
|
|---|
| 1053 |
|
|---|
| 1054 | /**
|
|---|
| 1055 | * Does the initial directory populating or refreshes it if it has been
|
|---|
| 1056 | * invalidated.
|
|---|
| 1057 | *
|
|---|
| 1058 | * This assumes the parent directory is opened.
|
|---|
| 1059 | *
|
|---|
| 1060 | * @returns K_TRUE on success, K_FALSE on error.
|
|---|
| 1061 | * @param pCache The cache.
|
|---|
| 1062 | * @param pDir The directory.
|
|---|
| 1063 | * @param penmError Where to store K_FALSE explanation.
|
|---|
| 1064 | */
|
|---|
| 1065 | static KBOOL kFsCachePopuplateOrRefreshDir(PKFSCACHE pCache, PKFSDIR pDir, KFSLOOKUPERROR *penmError)
|
|---|
| 1066 | {
|
|---|
| 1067 | KBOOL fRefreshing = K_FALSE;
|
|---|
| 1068 | KFSDIRREPOP DirRePop = { NULL, 0, 0, 0, NULL };
|
|---|
| 1069 | MY_UNICODE_STRING UniStrStar = { 1 * sizeof(wchar_t), 2 * sizeof(wchar_t), L"*" };
|
|---|
| 1070 |
|
|---|
| 1071 | /** @todo May have to make this more flexible wrt information classes since
|
|---|
| 1072 | * older windows versions (XP, w2K) might not correctly support the
|
|---|
| 1073 | * ones with file ID on all file systems. */
|
|---|
| 1074 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1075 | MY_FILE_INFORMATION_CLASS const enmInfoClassWithId = MyFileIdBothDirectoryInformation;
|
|---|
| 1076 | MY_FILE_INFORMATION_CLASS enmInfoClass = MyFileIdBothDirectoryInformation;
|
|---|
| 1077 | #else
|
|---|
| 1078 | MY_FILE_INFORMATION_CLASS const enmInfoClassWithId = MyFileIdFullDirectoryInformation;
|
|---|
| 1079 | MY_FILE_INFORMATION_CLASS enmInfoClass = MyFileIdFullDirectoryInformation;
|
|---|
| 1080 | #endif
|
|---|
| 1081 | MY_NTSTATUS rcNt;
|
|---|
| 1082 | MY_IO_STATUS_BLOCK Ios;
|
|---|
| 1083 | union
|
|---|
| 1084 | {
|
|---|
| 1085 | /* Include the structures for better alignment. */
|
|---|
| 1086 | MY_FILE_ID_BOTH_DIR_INFORMATION WithId;
|
|---|
| 1087 | MY_FILE_ID_FULL_DIR_INFORMATION NoId;
|
|---|
| 1088 | /* Buffer padding. We're using a 56KB buffer here to avoid size troubles with CIFS and such. */
|
|---|
| 1089 | KU8 abBuf[56*1024];
|
|---|
| 1090 | } uBuf;
|
|---|
| 1091 |
|
|---|
| 1092 |
|
|---|
| 1093 | /*
|
|---|
| 1094 | * Open the directory.
|
|---|
| 1095 | */
|
|---|
| 1096 | if (pDir->hDir == INVALID_HANDLE_VALUE)
|
|---|
| 1097 | {
|
|---|
| 1098 | MY_OBJECT_ATTRIBUTES ObjAttr;
|
|---|
| 1099 | MY_UNICODE_STRING UniStr;
|
|---|
| 1100 |
|
|---|
| 1101 | kHlpAssert(!pDir->fPopulated);
|
|---|
| 1102 |
|
|---|
| 1103 | Ios.Information = -1;
|
|---|
| 1104 | Ios.u.Status = -1;
|
|---|
| 1105 |
|
|---|
| 1106 | UniStr.Buffer = (wchar_t *)pDir->Obj.pwszName;
|
|---|
| 1107 | UniStr.Length = (USHORT)(pDir->Obj.cwcName * sizeof(wchar_t));
|
|---|
| 1108 | UniStr.MaximumLength = UniStr.Length + sizeof(wchar_t);
|
|---|
| 1109 |
|
|---|
| 1110 | kHlpAssertStmtReturn(pDir->Obj.pParent, *penmError = KFSLOOKUPERROR_INTERNAL_ERROR, K_FALSE);
|
|---|
| 1111 | kHlpAssertStmtReturn(pDir->Obj.pParent->hDir != INVALID_HANDLE_VALUE, *penmError = KFSLOOKUPERROR_INTERNAL_ERROR, K_FALSE);
|
|---|
| 1112 | MyInitializeObjectAttributes(&ObjAttr, &UniStr, OBJ_CASE_INSENSITIVE, pDir->Obj.pParent->hDir, NULL /*pSecAttr*/);
|
|---|
| 1113 |
|
|---|
| 1114 | /** @todo FILE_OPEN_REPARSE_POINT? */
|
|---|
| 1115 | rcNt = g_pfnNtCreateFile(&pDir->hDir,
|
|---|
| 1116 | FILE_READ_DATA | FILE_LIST_DIRECTORY | FILE_READ_ATTRIBUTES | SYNCHRONIZE,
|
|---|
| 1117 | &ObjAttr,
|
|---|
| 1118 | &Ios,
|
|---|
| 1119 | NULL, /*cbFileInitialAlloc */
|
|---|
| 1120 | FILE_ATTRIBUTE_NORMAL,
|
|---|
| 1121 | FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
|
|---|
| 1122 | FILE_OPEN,
|
|---|
| 1123 | FILE_DIRECTORY_FILE | FILE_OPEN_FOR_BACKUP_INTENT | FILE_SYNCHRONOUS_IO_NONALERT,
|
|---|
| 1124 | NULL, /*pEaBuffer*/
|
|---|
| 1125 | 0); /*cbEaBuffer*/
|
|---|
| 1126 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1127 | { /* likely */ }
|
|---|
| 1128 | else
|
|---|
| 1129 | {
|
|---|
| 1130 | pDir->hDir = INVALID_HANDLE_VALUE;
|
|---|
| 1131 | *penmError = KFSLOOKUPERROR_DIR_OPEN_ERROR;
|
|---|
| 1132 | return K_FALSE;
|
|---|
| 1133 | }
|
|---|
| 1134 | }
|
|---|
| 1135 | /*
|
|---|
| 1136 | * When re-populating, we replace papChildren in the directory and pick
|
|---|
| 1137 | * from the old one as we go along.
|
|---|
| 1138 | */
|
|---|
| 1139 | else if (pDir->fPopulated)
|
|---|
| 1140 | {
|
|---|
| 1141 | KU32 cAllocated = K_ALIGN_Z(pDir->cChildren, 16);
|
|---|
| 1142 | void *pvNew = kHlpAlloc(sizeof(pDir->papChildren[0]) * cAllocated);
|
|---|
| 1143 | if (pvNew)
|
|---|
| 1144 | {
|
|---|
| 1145 | DirRePop.papOldChildren = pDir->papChildren;
|
|---|
| 1146 | DirRePop.cOldChildren = pDir->cChildren;
|
|---|
| 1147 | DirRePop.iNextOldChild = 0;
|
|---|
| 1148 | DirRePop.cNextOldChildInc = 1;
|
|---|
| 1149 | DirRePop.pCache = pCache;
|
|---|
| 1150 |
|
|---|
| 1151 | pDir->cChildren = 0;
|
|---|
| 1152 | pDir->cChildrenAllocated = cAllocated;
|
|---|
| 1153 | pDir->papChildren = (PKFSOBJ *)pvNew;
|
|---|
| 1154 | }
|
|---|
| 1155 | else
|
|---|
| 1156 | {
|
|---|
| 1157 | *penmError = KFSLOOKUPERROR_OUT_OF_MEMORY;
|
|---|
| 1158 | return K_FALSE;
|
|---|
| 1159 | }
|
|---|
| 1160 |
|
|---|
| 1161 | fRefreshing = K_TRUE;
|
|---|
| 1162 | }
|
|---|
| 1163 | if (!fRefreshing)
|
|---|
| 1164 | KFSCACHE_LOG(("Populating %s...\n", pDir->Obj.pszName));
|
|---|
| 1165 | else
|
|---|
| 1166 | KFSCACHE_LOG(("Refreshing %s...\n", pDir->Obj.pszName));
|
|---|
| 1167 |
|
|---|
| 1168 | /*
|
|---|
| 1169 | * Enumerate the directory content.
|
|---|
| 1170 | *
|
|---|
| 1171 | * Note! The "*" filter is necessary because kFsCacheRefreshObj may have
|
|---|
| 1172 | * previously quried a single file name and just passing NULL would
|
|---|
| 1173 | * restart that single file name query.
|
|---|
| 1174 | */
|
|---|
| 1175 | Ios.Information = -1;
|
|---|
| 1176 | Ios.u.Status = -1;
|
|---|
| 1177 | rcNt = g_pfnNtQueryDirectoryFile(pDir->hDir,
|
|---|
| 1178 | NULL, /* hEvent */
|
|---|
| 1179 | NULL, /* pfnApcComplete */
|
|---|
| 1180 | NULL, /* pvApcCompleteCtx */
|
|---|
| 1181 | &Ios,
|
|---|
| 1182 | &uBuf,
|
|---|
| 1183 | sizeof(uBuf),
|
|---|
| 1184 | enmInfoClass,
|
|---|
| 1185 | FALSE, /* fReturnSingleEntry */
|
|---|
| 1186 | &UniStrStar, /* Filter / restart pos. */
|
|---|
| 1187 | TRUE); /* fRestartScan */
|
|---|
| 1188 | while (MY_NT_SUCCESS(rcNt))
|
|---|
| 1189 | {
|
|---|
| 1190 | /*
|
|---|
| 1191 | * Process the entries in the buffer.
|
|---|
| 1192 | */
|
|---|
| 1193 | KSIZE offBuf = 0;
|
|---|
| 1194 | for (;;)
|
|---|
| 1195 | {
|
|---|
| 1196 | union
|
|---|
| 1197 | {
|
|---|
| 1198 | KU8 *pb;
|
|---|
| 1199 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1200 | MY_FILE_ID_BOTH_DIR_INFORMATION *pWithId;
|
|---|
| 1201 | MY_FILE_BOTH_DIR_INFORMATION *pNoId;
|
|---|
| 1202 | #else
|
|---|
| 1203 | MY_FILE_ID_FULL_DIR_INFORMATION *pWithId;
|
|---|
| 1204 | MY_FILE_FULL_DIR_INFORMATION *pNoId;
|
|---|
| 1205 | #endif
|
|---|
| 1206 | } uPtr;
|
|---|
| 1207 | PKFSOBJ pCur;
|
|---|
| 1208 | KU32 offNext;
|
|---|
| 1209 | KU32 cbMinCur;
|
|---|
| 1210 | wchar_t *pwchFilename;
|
|---|
| 1211 |
|
|---|
| 1212 | /* ASSUME only the FileName member differs between the two structures. */
|
|---|
| 1213 | uPtr.pb = &uBuf.abBuf[offBuf];
|
|---|
| 1214 | if (enmInfoClass == enmInfoClassWithId)
|
|---|
| 1215 | {
|
|---|
| 1216 | pwchFilename = &uPtr.pWithId->FileName[0];
|
|---|
| 1217 | cbMinCur = (KU32)((uintptr_t)&uPtr.pWithId->FileName[0] - (uintptr_t)uPtr.pWithId);
|
|---|
| 1218 | cbMinCur += uPtr.pNoId->FileNameLength;
|
|---|
| 1219 | }
|
|---|
| 1220 | else
|
|---|
| 1221 | {
|
|---|
| 1222 | pwchFilename = &uPtr.pNoId->FileName[0];
|
|---|
| 1223 | cbMinCur = (KU32)((uintptr_t)&uPtr.pNoId->FileName[0] - (uintptr_t)uPtr.pNoId);
|
|---|
| 1224 | cbMinCur += uPtr.pNoId->FileNameLength;
|
|---|
| 1225 | }
|
|---|
| 1226 |
|
|---|
| 1227 | /* We need to skip the '.' and '..' entries. */
|
|---|
| 1228 | if ( *pwchFilename != '.'
|
|---|
| 1229 | || uPtr.pNoId->FileNameLength > 4
|
|---|
| 1230 | || !( uPtr.pNoId->FileNameLength == 2
|
|---|
| 1231 | || ( uPtr.pNoId->FileNameLength == 4
|
|---|
| 1232 | && pwchFilename[1] == '.') )
|
|---|
| 1233 | )
|
|---|
| 1234 | {
|
|---|
| 1235 | KBOOL fRc;
|
|---|
| 1236 | KU8 const bObjType = uPtr.pNoId->FileAttributes & FILE_ATTRIBUTE_DIRECTORY ? KFSOBJ_TYPE_DIR
|
|---|
| 1237 | : uPtr.pNoId->FileAttributes & (FILE_ATTRIBUTE_DEVICE | FILE_ATTRIBUTE_REPARSE_POINT)
|
|---|
| 1238 | ? KFSOBJ_TYPE_OTHER : KFSOBJ_TYPE_FILE;
|
|---|
| 1239 |
|
|---|
| 1240 | /*
|
|---|
| 1241 | * If refreshing, we must first see if this directory entry already
|
|---|
| 1242 | * exists.
|
|---|
| 1243 | */
|
|---|
| 1244 | if (!fRefreshing)
|
|---|
| 1245 | pCur = NULL;
|
|---|
| 1246 | else
|
|---|
| 1247 | {
|
|---|
| 1248 | pCur = kFsCacheDirFindOldChild(&DirRePop,
|
|---|
| 1249 | enmInfoClass == enmInfoClassWithId ? uPtr.pWithId->FileId.QuadPart : 0,
|
|---|
| 1250 | pwchFilename, uPtr.pWithId->FileNameLength / sizeof(wchar_t)
|
|---|
| 1251 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1252 | , uPtr.pWithId->ShortName, uPtr.pWithId->ShortNameLength / sizeof(wchar_t)
|
|---|
| 1253 | #endif
|
|---|
| 1254 | );
|
|---|
| 1255 | if (pCur)
|
|---|
| 1256 | {
|
|---|
| 1257 | if (pCur->bObjType == bObjType)
|
|---|
| 1258 | {
|
|---|
| 1259 | if (pCur->bObjType == KFSOBJ_TYPE_DIR)
|
|---|
| 1260 | {
|
|---|
| 1261 | PKFSDIR pCurDir = (PKFSDIR)pCur;
|
|---|
| 1262 | if ( !pCurDir->fPopulated
|
|---|
| 1263 | || ( pCurDir->iLastWrite == uPtr.pWithId->LastWriteTime.QuadPart
|
|---|
| 1264 | && (pCur->fFlags & KFSOBJ_F_WORKING_DIR_MTIME) ) )
|
|---|
| 1265 | { /* kind of likely */ }
|
|---|
| 1266 | else
|
|---|
| 1267 | {
|
|---|
| 1268 | KFSCACHE_LOG(("Refreshing %s/%s/ - %s/ needs re-populating...\n",
|
|---|
| 1269 | pDir->Obj.pParent->Obj.pszName, pDir->Obj.pszName, pCur->pszName));
|
|---|
| 1270 | pCurDir->fNeedRePopulating = K_TRUE;
|
|---|
| 1271 | }
|
|---|
| 1272 | }
|
|---|
| 1273 | }
|
|---|
| 1274 | else if (pCur->bObjType == KFSOBJ_TYPE_MISSING)
|
|---|
| 1275 | {
|
|---|
| 1276 | KFSCACHE_LOG(("Refreshing %s/%s/ - %s appeared as %u, was missing.\n",
|
|---|
| 1277 | pDir->Obj.pParent->Obj.pszName, pDir->Obj.pszName, pCur->pszName, bObjType));
|
|---|
| 1278 | pCur->bObjType = bObjType;
|
|---|
| 1279 | }
|
|---|
| 1280 | else
|
|---|
| 1281 | {
|
|---|
| 1282 | KFSCACHE_LOG(("Refreshing %s/%s/ - %s changed type from %u to %u! Dropping old object.\n",
|
|---|
| 1283 | pDir->Obj.pParent->Obj.pszName, pDir->Obj.pszName, pCur->pszName,
|
|---|
| 1284 | pCur->bObjType, bObjType));
|
|---|
| 1285 | kFsCacheObjRelease(pCache, pCur);
|
|---|
| 1286 | pCur = NULL;
|
|---|
| 1287 | }
|
|---|
| 1288 | }
|
|---|
| 1289 | else
|
|---|
| 1290 | KFSCACHE_LOG(("Refreshing %s/%s/ - %*.*ls added.\n", pDir->Obj.pParent->Obj.pszName, pDir->Obj.pszName,
|
|---|
| 1291 | uPtr.pNoId->FileNameLength / sizeof(wchar_t), uPtr.pNoId->FileNameLength / sizeof(wchar_t),
|
|---|
| 1292 | pwchFilename));
|
|---|
| 1293 | }
|
|---|
| 1294 |
|
|---|
| 1295 | if (!pCur)
|
|---|
| 1296 | {
|
|---|
| 1297 | /*
|
|---|
| 1298 | * Create the entry (not linked yet).
|
|---|
| 1299 | */
|
|---|
| 1300 | pCur = kFsCacheCreateObjectW(pCache, pDir, pwchFilename, uPtr.pNoId->FileNameLength / sizeof(wchar_t),
|
|---|
| 1301 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1302 | uPtr.pNoId->ShortName, uPtr.pNoId->ShortNameLength / sizeof(wchar_t),
|
|---|
| 1303 | #endif
|
|---|
| 1304 | bObjType, penmError);
|
|---|
| 1305 | if (!pCur)
|
|---|
| 1306 | return K_FALSE;
|
|---|
| 1307 | kHlpAssert(pCur->cRefs == 1);
|
|---|
| 1308 | }
|
|---|
| 1309 |
|
|---|
| 1310 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1311 | if (enmInfoClass == enmInfoClassWithId)
|
|---|
| 1312 | birdStatFillFromFileIdBothDirInfo(&pCur->Stats, uPtr.pWithId, pCur->pszName);
|
|---|
| 1313 | else
|
|---|
| 1314 | birdStatFillFromFileBothDirInfo(&pCur->Stats, uPtr.pNoId, pCur->pszName);
|
|---|
| 1315 | #else
|
|---|
| 1316 | if (enmInfoClass == enmInfoClassWithId)
|
|---|
| 1317 | birdStatFillFromFileIdFullDirInfo(&pCur->Stats, uPtr.pWithId, pCur->pszName);
|
|---|
| 1318 | else
|
|---|
| 1319 | birdStatFillFromFileFullDirInfo(&pCur->Stats, uPtr.pNoId, pCur->pszName);
|
|---|
| 1320 | #endif
|
|---|
| 1321 | pCur->Stats.st_dev = pDir->uDevNo;
|
|---|
| 1322 | pCur->fHaveStats = K_TRUE;
|
|---|
| 1323 |
|
|---|
| 1324 | /*
|
|---|
| 1325 | * Add the entry to the directory.
|
|---|
| 1326 | */
|
|---|
| 1327 | fRc = kFsCacheDirAddChild(pCache, pDir, pCur, penmError);
|
|---|
| 1328 | kFsCacheObjRelease(pCache, pCur);
|
|---|
| 1329 | if (fRc)
|
|---|
| 1330 | { /* likely */ }
|
|---|
| 1331 | else
|
|---|
| 1332 | {
|
|---|
| 1333 | rcNt = STATUS_NO_MEMORY;
|
|---|
| 1334 | break;
|
|---|
| 1335 | }
|
|---|
| 1336 | }
|
|---|
| 1337 | /*
|
|---|
| 1338 | * When seeing '.' we update the directory info.
|
|---|
| 1339 | */
|
|---|
| 1340 | else if (uPtr.pNoId->FileNameLength == 2)
|
|---|
| 1341 | {
|
|---|
| 1342 | pDir->iLastWrite = uPtr.pNoId->LastWriteTime.QuadPart;
|
|---|
| 1343 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1344 | if (enmInfoClass == enmInfoClassWithId)
|
|---|
| 1345 | birdStatFillFromFileIdBothDirInfo(&pDir->Obj.Stats, uPtr.pWithId, pDir->Obj.pszName);
|
|---|
| 1346 | else
|
|---|
| 1347 | birdStatFillFromFileBothDirInfo(&pDir->Obj.Stats, uPtr.pNoId, pDir->Obj.pszName);
|
|---|
| 1348 | #else
|
|---|
| 1349 | if (enmInfoClass == enmInfoClassWithId)
|
|---|
| 1350 | birdStatFillFromFileIdFullDirInfo(&pDir->Obj.Stats, uPtr.pWithId, pDir->Obj.pszName);
|
|---|
| 1351 | else
|
|---|
| 1352 | birdStatFillFromFileFullDirInfo(&pDir->Obj.Stats, uPtr.pNoId, pDir->Obj.pszName);
|
|---|
| 1353 | #endif
|
|---|
| 1354 | }
|
|---|
| 1355 |
|
|---|
| 1356 | /*
|
|---|
| 1357 | * Advance.
|
|---|
| 1358 | */
|
|---|
| 1359 | offNext = uPtr.pNoId->NextEntryOffset;
|
|---|
| 1360 | if ( offNext >= cbMinCur
|
|---|
| 1361 | && offNext < sizeof(uBuf))
|
|---|
| 1362 | offBuf += offNext;
|
|---|
| 1363 | else
|
|---|
| 1364 | break;
|
|---|
| 1365 | }
|
|---|
| 1366 |
|
|---|
| 1367 | /*
|
|---|
| 1368 | * Read the next chunk.
|
|---|
| 1369 | */
|
|---|
| 1370 | rcNt = g_pfnNtQueryDirectoryFile(pDir->hDir,
|
|---|
| 1371 | NULL, /* hEvent */
|
|---|
| 1372 | NULL, /* pfnApcComplete */
|
|---|
| 1373 | NULL, /* pvApcCompleteCtx */
|
|---|
| 1374 | &Ios,
|
|---|
| 1375 | &uBuf,
|
|---|
| 1376 | sizeof(uBuf),
|
|---|
| 1377 | enmInfoClass,
|
|---|
| 1378 | FALSE, /* fReturnSingleEntry */
|
|---|
| 1379 | &UniStrStar, /* Filter / restart pos. */
|
|---|
| 1380 | FALSE); /* fRestartScan */
|
|---|
| 1381 | }
|
|---|
| 1382 |
|
|---|
| 1383 | if (rcNt == MY_STATUS_NO_MORE_FILES)
|
|---|
| 1384 | {
|
|---|
| 1385 | /*
|
|---|
| 1386 | * If refreshing, add missing children objects and ditch the rest.
|
|---|
| 1387 | * We ignore errors while adding missing children (lazy bird).
|
|---|
| 1388 | */
|
|---|
| 1389 | if (!fRefreshing)
|
|---|
| 1390 | { /* more likely */ }
|
|---|
| 1391 | else
|
|---|
| 1392 | {
|
|---|
| 1393 | while (DirRePop.cOldChildren > 0)
|
|---|
| 1394 | {
|
|---|
| 1395 | KFSLOOKUPERROR enmErrorIgn;
|
|---|
| 1396 | PKFSOBJ pOldChild = DirRePop.papOldChildren[--DirRePop.cOldChildren];
|
|---|
| 1397 | if (pOldChild->bObjType == KFSOBJ_TYPE_MISSING)
|
|---|
| 1398 | kFsCacheDirAddChild(pCache, pDir, pOldChild, &enmErrorIgn);
|
|---|
| 1399 | else
|
|---|
| 1400 | {
|
|---|
| 1401 | KFSCACHE_LOG(("Refreshing %s/%s/ - %s was removed.\n",
|
|---|
| 1402 | pDir->Obj.pParent->Obj.pszName, pDir->Obj.pszName, pOldChild->pszName));
|
|---|
| 1403 | kHlpAssert(pOldChild->bObjType != KFSOBJ_TYPE_DIR);
|
|---|
| 1404 | }
|
|---|
| 1405 | kFsCacheObjRelease(pCache, pOldChild);
|
|---|
| 1406 | }
|
|---|
| 1407 | kHlpFree(DirRePop.papOldChildren);
|
|---|
| 1408 | }
|
|---|
| 1409 |
|
|---|
| 1410 | /*
|
|---|
| 1411 | * Mark the directory as fully populated and up to date.
|
|---|
| 1412 | */
|
|---|
| 1413 | pDir->fPopulated = K_TRUE;
|
|---|
| 1414 | pDir->fNeedRePopulating = K_FALSE;
|
|---|
| 1415 | if (pDir->Obj.uCacheGen != KFSOBJ_CACHE_GEN_IGNORE)
|
|---|
| 1416 | pDir->Obj.uCacheGen = pCache->uGeneration;
|
|---|
| 1417 | return K_TRUE;
|
|---|
| 1418 | }
|
|---|
| 1419 |
|
|---|
| 1420 | /*
|
|---|
| 1421 | * If we failed during refresh, add back remaining old children.
|
|---|
| 1422 | */
|
|---|
| 1423 | if (!fRefreshing)
|
|---|
| 1424 | {
|
|---|
| 1425 | while (DirRePop.cOldChildren > 0)
|
|---|
| 1426 | {
|
|---|
| 1427 | KFSLOOKUPERROR enmErrorIgn;
|
|---|
| 1428 | PKFSOBJ pOldChild = DirRePop.papOldChildren[--DirRePop.cOldChildren];
|
|---|
| 1429 | kFsCacheDirAddChild(pCache, pDir, pOldChild, &enmErrorIgn);
|
|---|
| 1430 | kFsCacheObjRelease(pCache, pOldChild);
|
|---|
| 1431 | }
|
|---|
| 1432 | kHlpFree(DirRePop.papOldChildren);
|
|---|
| 1433 | }
|
|---|
| 1434 |
|
|---|
| 1435 | kHlpAssertMsgFailed(("%#x\n", rcNt));
|
|---|
| 1436 | *penmError = KFSLOOKUPERROR_DIR_READ_ERROR;
|
|---|
| 1437 | return K_TRUE;
|
|---|
| 1438 | }
|
|---|
| 1439 |
|
|---|
| 1440 |
|
|---|
| 1441 | /**
|
|---|
| 1442 | * Does the initial directory populating or refreshes it if it has been
|
|---|
| 1443 | * invalidated.
|
|---|
| 1444 | *
|
|---|
| 1445 | * This assumes the parent directory is opened.
|
|---|
| 1446 | *
|
|---|
| 1447 | * @returns K_TRUE on success, K_FALSE on error.
|
|---|
| 1448 | * @param pCache The cache.
|
|---|
| 1449 | * @param pDir The directory.
|
|---|
| 1450 | * @param penmError Where to store K_FALSE explanation. Optional.
|
|---|
| 1451 | */
|
|---|
| 1452 | KBOOL kFsCacheDirEnsurePopuplated(PKFSCACHE pCache, PKFSDIR pDir, KFSLOOKUPERROR *penmError)
|
|---|
| 1453 | {
|
|---|
| 1454 | KFSLOOKUPERROR enmIgnored;
|
|---|
| 1455 | if ( pDir->fPopulated
|
|---|
| 1456 | && ( pDir->Obj.uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 1457 | || pDir->Obj.uCacheGen == pCache->uGeneration) )
|
|---|
| 1458 | return K_TRUE;
|
|---|
| 1459 | return kFsCachePopuplateOrRefreshDir(pCache, pDir, penmError ? penmError : &enmIgnored);
|
|---|
| 1460 | }
|
|---|
| 1461 |
|
|---|
| 1462 |
|
|---|
| 1463 | /**
|
|---|
| 1464 | * Checks whether the modified timestamp differs on this directory.
|
|---|
| 1465 | *
|
|---|
| 1466 | * @returns K_TRUE if possibly modified, K_FALSE if definitely not modified.
|
|---|
| 1467 | * @param pDir The directory..
|
|---|
| 1468 | */
|
|---|
| 1469 | static KBOOL kFsCacheDirIsModified(PKFSDIR pDir)
|
|---|
| 1470 | {
|
|---|
| 1471 | if ( pDir->hDir != INVALID_HANDLE_VALUE
|
|---|
| 1472 | && (pDir->Obj.fFlags & KFSOBJ_F_WORKING_DIR_MTIME) )
|
|---|
| 1473 | {
|
|---|
| 1474 | MY_IO_STATUS_BLOCK Ios;
|
|---|
| 1475 | MY_FILE_BASIC_INFORMATION BasicInfo;
|
|---|
| 1476 | MY_NTSTATUS rcNt;
|
|---|
| 1477 |
|
|---|
| 1478 | Ios.Information = -1;
|
|---|
| 1479 | Ios.u.Status = -1;
|
|---|
| 1480 |
|
|---|
| 1481 | rcNt = g_pfnNtQueryInformationFile(pDir->hDir, &Ios, &BasicInfo, sizeof(BasicInfo), MyFileBasicInformation);
|
|---|
| 1482 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1483 | return BasicInfo.LastWriteTime.QuadPart != pDir->iLastWrite;
|
|---|
| 1484 | }
|
|---|
| 1485 | /* The cache root never changes. */
|
|---|
| 1486 | else if (!pDir->Obj.pParent)
|
|---|
| 1487 | return K_FALSE;
|
|---|
| 1488 |
|
|---|
| 1489 | return K_TRUE;
|
|---|
| 1490 | }
|
|---|
| 1491 |
|
|---|
| 1492 |
|
|---|
| 1493 | static KBOOL kFsCacheRefreshMissing(PKFSCACHE pCache, PKFSOBJ pMissing, KFSLOOKUPERROR *penmError)
|
|---|
| 1494 | {
|
|---|
| 1495 | /*
|
|---|
| 1496 | * If we can, we start by checking whether the parent directory
|
|---|
| 1497 | * has been modified. If it has, we need to check if this entry
|
|---|
| 1498 | * was added or not, most likely it wasn't added.
|
|---|
| 1499 | */
|
|---|
| 1500 | if (!kFsCacheDirIsModified(pMissing->pParent))
|
|---|
| 1501 | {
|
|---|
| 1502 | KFSCACHE_LOG(("Parent of missing not written to %s/%s\n", pMissing->pParent->Obj.pszName, pMissing->pszName));
|
|---|
| 1503 | pMissing->uCacheGen = pCache->uGenerationMissing;
|
|---|
| 1504 | }
|
|---|
| 1505 | else
|
|---|
| 1506 | {
|
|---|
| 1507 | MY_UNICODE_STRING UniStr;
|
|---|
| 1508 | MY_OBJECT_ATTRIBUTES ObjAttr;
|
|---|
| 1509 | MY_FILE_BASIC_INFORMATION BasicInfo;
|
|---|
| 1510 | MY_NTSTATUS rcNt;
|
|---|
| 1511 |
|
|---|
| 1512 | UniStr.Buffer = (wchar_t *)pMissing->pwszName;
|
|---|
| 1513 | UniStr.Length = (USHORT)(pMissing->cwcName * sizeof(wchar_t));
|
|---|
| 1514 | UniStr.MaximumLength = UniStr.Length + sizeof(wchar_t);
|
|---|
| 1515 |
|
|---|
| 1516 | kHlpAssert(pMissing->pParent->hDir != INVALID_HANDLE_VALUE);
|
|---|
| 1517 | MyInitializeObjectAttributes(&ObjAttr, &UniStr, OBJ_CASE_INSENSITIVE, pMissing->pParent->hDir, NULL /*pSecAttr*/);
|
|---|
| 1518 |
|
|---|
| 1519 | rcNt = g_pfnNtQueryAttributesFile(&ObjAttr, &BasicInfo);
|
|---|
| 1520 | if (!MY_NT_SUCCESS(rcNt))
|
|---|
| 1521 | {
|
|---|
| 1522 | /*
|
|---|
| 1523 | * Probably more likely that a missing node stays missing.
|
|---|
| 1524 | */
|
|---|
| 1525 | pMissing->uCacheGen = pCache->uGenerationMissing;
|
|---|
| 1526 | KFSCACHE_LOG(("Still missing %s/%s\n", pMissing->pParent->Obj.pszName, pMissing->pszName));
|
|---|
| 1527 | }
|
|---|
| 1528 | else
|
|---|
| 1529 | {
|
|---|
| 1530 | /*
|
|---|
| 1531 | * We must metamorphose this node. This is tedious business
|
|---|
| 1532 | * because we need to check the file name casing. We might
|
|---|
| 1533 | * just as well update the parent directory...
|
|---|
| 1534 | */
|
|---|
| 1535 | KFSCACHE_LOG(("Birth of %s/%s with attribs %#x...\n",
|
|---|
| 1536 | pMissing->pParent->Obj.pszName, pMissing->pszName, BasicInfo.FileAttributes));
|
|---|
| 1537 | /** @todo */
|
|---|
| 1538 | __debugbreak();
|
|---|
| 1539 | }
|
|---|
| 1540 | }
|
|---|
| 1541 |
|
|---|
| 1542 | return K_TRUE;
|
|---|
| 1543 | }
|
|---|
| 1544 |
|
|---|
| 1545 |
|
|---|
| 1546 | static KBOOL kFsCacheRefreshMissingIntermediateDir(PKFSCACHE pCache, PKFSOBJ pMissing, KFSLOOKUPERROR *penmError)
|
|---|
| 1547 | {
|
|---|
| 1548 | if (kFsCacheRefreshMissing(pCache, pMissing, penmError))
|
|---|
| 1549 | {
|
|---|
| 1550 | if ( pMissing->bObjType == KFSOBJ_TYPE_DIR
|
|---|
| 1551 | || pMissing->bObjType == KFSOBJ_TYPE_MISSING)
|
|---|
| 1552 | return K_TRUE;
|
|---|
| 1553 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_DIR;
|
|---|
| 1554 | }
|
|---|
| 1555 |
|
|---|
| 1556 | return K_FALSE;
|
|---|
| 1557 | }
|
|---|
| 1558 |
|
|---|
| 1559 |
|
|---|
| 1560 | /**
|
|---|
| 1561 | * Generic object refresh.
|
|---|
| 1562 | *
|
|---|
| 1563 | * This does not refresh the content of directories.
|
|---|
| 1564 | *
|
|---|
| 1565 | * @returns K_TRUE on success. K_FALSE and *penmError on failure.
|
|---|
| 1566 | * @param pCache The cache.
|
|---|
| 1567 | * @param pObj The object.
|
|---|
| 1568 | * @param penmError Where to return error info.
|
|---|
| 1569 | */
|
|---|
| 1570 | static KBOOL kFsCacheRefreshObj(PKFSCACHE pCache, PKFSOBJ pObj, KFSLOOKUPERROR *penmError)
|
|---|
| 1571 | {
|
|---|
| 1572 | KBOOL fRc;
|
|---|
| 1573 |
|
|---|
| 1574 | /*
|
|---|
| 1575 | * Since we generally assume nothing goes away in this cache, we only really
|
|---|
| 1576 | * have a hard time with negative entries. So, missing stuff goes to
|
|---|
| 1577 | * complicated land.
|
|---|
| 1578 | */
|
|---|
| 1579 | if (pObj->bObjType == KFSOBJ_TYPE_MISSING)
|
|---|
| 1580 | fRc = kFsCacheRefreshMissing(pCache, pObj, penmError);
|
|---|
| 1581 | else
|
|---|
| 1582 | {
|
|---|
| 1583 | /*
|
|---|
| 1584 | * This object is supposed to exist, so all we need to do is query essential
|
|---|
| 1585 | * stats again. Since we've already got handles on directories, there are
|
|---|
| 1586 | * two ways to go about this.
|
|---|
| 1587 | */
|
|---|
| 1588 | union
|
|---|
| 1589 | {
|
|---|
| 1590 | MY_FILE_NETWORK_OPEN_INFORMATION FullInfo;
|
|---|
| 1591 | MY_FILE_STANDARD_INFORMATION StdInfo;
|
|---|
| 1592 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1593 | MY_FILE_ID_BOTH_DIR_INFORMATION WithId;
|
|---|
| 1594 | //MY_FILE_BOTH_DIR_INFORMATION NoId;
|
|---|
| 1595 | #else
|
|---|
| 1596 | MY_FILE_ID_FULL_DIR_INFORMATION WithId;
|
|---|
| 1597 | //MY_FILE_FULL_DIR_INFORMATION NoId;
|
|---|
| 1598 | #endif
|
|---|
| 1599 | KU8 abPadding[ sizeof(wchar_t) * KFSCACHE_CFG_MAX_UTF16_NAME
|
|---|
| 1600 | + sizeof(MY_FILE_ID_BOTH_DIR_INFORMATION)];
|
|---|
| 1601 | } uBuf;
|
|---|
| 1602 | MY_IO_STATUS_BLOCK Ios;
|
|---|
| 1603 | MY_NTSTATUS rcNt;
|
|---|
| 1604 | if ( pObj->bObjType != KFSOBJ_TYPE_DIR
|
|---|
| 1605 | || ((PKFSDIR)pObj)->hDir == INVALID_HANDLE_VALUE)
|
|---|
| 1606 | {
|
|---|
| 1607 | #if 0 /** @todo performance check these two alternatives. */
|
|---|
| 1608 | MY_UNICODE_STRING UniStr;
|
|---|
| 1609 | MY_OBJECT_ATTRIBUTES ObjAttr;
|
|---|
| 1610 |
|
|---|
| 1611 | UniStr.Buffer = (wchar_t *)pObj->pwszName;
|
|---|
| 1612 | UniStr.Length = (USHORT)(pObj->cwcName * sizeof(wchar_t));
|
|---|
| 1613 | UniStr.MaximumLength = UniStr.Length + sizeof(wchar_t);
|
|---|
| 1614 |
|
|---|
| 1615 | kHlpAssert(pObj->pParent->hDir != INVALID_HANDLE_VALUE);
|
|---|
| 1616 | MyInitializeObjectAttributes(&ObjAttr, &UniStr, OBJ_CASE_INSENSITIVE, pObj->pParent->hDir, NULL /*pSecAttr*/);
|
|---|
| 1617 |
|
|---|
| 1618 | rcNt = g_pfnNtQueryFullAttributesFile(&ObjAttr, &uBuf.FullInfo);
|
|---|
| 1619 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1620 | {
|
|---|
| 1621 | pObj->Stats.st_size = uBuf.FullInfo.EndOfFile.QuadPart;
|
|---|
| 1622 | birdNtTimeToTimeSpec(uBuf.FullInfo.CreationTime.QuadPart, &pObj->Stats.st_birthtim);
|
|---|
| 1623 | birdNtTimeToTimeSpec(uBuf.FullInfo.ChangeTime.QuadPart, &pObj->Stats.st_ctim);
|
|---|
| 1624 | birdNtTimeToTimeSpec(uBuf.FullInfo.LastWriteTime.QuadPart, &pObj->Stats.st_mtim);
|
|---|
| 1625 | birdNtTimeToTimeSpec(uBuf.FullInfo.LastAccessTime.QuadPart, &pObj->Stats.st_atim);
|
|---|
| 1626 | pObj->Stats.st_attribs = uBuf.FullInfo.FileAttributes;
|
|---|
| 1627 | pObj->Stats.st_blksize = 65536;
|
|---|
| 1628 | pObj->Stats.st_blocks = (uBuf.FullInfo.AllocationSize.QuadPart + BIRD_STAT_BLOCK_SIZE - 1)
|
|---|
| 1629 | / BIRD_STAT_BLOCK_SIZE;
|
|---|
| 1630 | }
|
|---|
| 1631 | #else
|
|---|
| 1632 | /* This alternative lets us keep the inode number up to date and
|
|---|
| 1633 | detect name case changes. */
|
|---|
| 1634 | MY_UNICODE_STRING UniStr;
|
|---|
| 1635 | # ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1636 | MY_FILE_INFORMATION_CLASS enmInfoClass = MyFileIdBothDirectoryInformation;
|
|---|
| 1637 | # else
|
|---|
| 1638 | MY_FILE_INFORMATION_CLASS enmInfoClass = MyFileIdFullDirectoryInformation;
|
|---|
| 1639 | # endif
|
|---|
| 1640 |
|
|---|
| 1641 | UniStr.Buffer = (wchar_t *)pObj->pwszName;
|
|---|
| 1642 | UniStr.Length = (USHORT)(pObj->cwcName * sizeof(wchar_t));
|
|---|
| 1643 | UniStr.MaximumLength = UniStr.Length + sizeof(wchar_t);
|
|---|
| 1644 |
|
|---|
| 1645 | kHlpAssert(pObj->pParent->hDir != INVALID_HANDLE_VALUE);
|
|---|
| 1646 |
|
|---|
| 1647 | Ios.Information = -1;
|
|---|
| 1648 | Ios.u.Status = -1;
|
|---|
| 1649 | rcNt = g_pfnNtQueryDirectoryFile(pObj->pParent->hDir,
|
|---|
| 1650 | NULL, /* hEvent */
|
|---|
| 1651 | NULL, /* pfnApcComplete */
|
|---|
| 1652 | NULL, /* pvApcCompleteCtx */
|
|---|
| 1653 | &Ios,
|
|---|
| 1654 | &uBuf,
|
|---|
| 1655 | sizeof(uBuf),
|
|---|
| 1656 | enmInfoClass,
|
|---|
| 1657 | TRUE, /* fReturnSingleEntry */
|
|---|
| 1658 | &UniStr, /* Filter / restart pos. */
|
|---|
| 1659 | TRUE); /* fRestartScan */
|
|---|
| 1660 |
|
|---|
| 1661 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1662 | {
|
|---|
| 1663 | if (pObj->Stats.st_ino == uBuf.WithId.FileId.QuadPart)
|
|---|
| 1664 | KFSCACHE_LOG(("Refreshing %s/%s, no ID change...\n", pObj->pParent->Obj.pszName, pObj->pszName));
|
|---|
| 1665 | else if ( pObj->cwcName == uBuf.WithId.FileNameLength / sizeof(wchar_t)
|
|---|
| 1666 | # ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1667 | && ( uBuf.WithId.ShortNameLength == 0
|
|---|
| 1668 | ? pObj->pwszName == pObj->pwszShortName
|
|---|
| 1669 | || ( pObj->cwcName == pObj->cwcShortName
|
|---|
| 1670 | && memcmp(pObj->pwszName, pObj->pwszShortName, pObj->cwcName * sizeof(wchar_t)) == 0)
|
|---|
| 1671 | : pObj->cwcShortName == uBuf.WithId.ShortNameLength / sizeof(wchar_t)
|
|---|
| 1672 | && memcmp(pObj->pwszShortName, uBuf.WithId.ShortName, uBuf.WithId.ShortNameLength) == 0
|
|---|
| 1673 | )
|
|---|
| 1674 | # endif
|
|---|
| 1675 | && memcmp(pObj->pwszName, uBuf.WithId.FileName, uBuf.WithId.FileNameLength) == 0
|
|---|
| 1676 | )
|
|---|
| 1677 | {
|
|---|
| 1678 | KFSCACHE_LOG(("Refreshing %s/%s, ID changed %#llx -> %#llx...\n",
|
|---|
| 1679 | pObj->pParent->Obj.pszName, pObj->pszName, pObj->Stats.st_ino, uBuf.WithId.FileId.QuadPart));
|
|---|
| 1680 | pObj->Stats.st_ino = uBuf.WithId.FileId.QuadPart;
|
|---|
| 1681 | }
|
|---|
| 1682 | else
|
|---|
| 1683 | {
|
|---|
| 1684 | KFSCACHE_LOG(("Refreshing %s/%s, ID changed %#llx -> %#llx and names too...\n",
|
|---|
| 1685 | pObj->pParent->Obj.pszName, pObj->pszName, pObj->Stats.st_ino, uBuf.WithId.FileId.QuadPart));
|
|---|
| 1686 | __debugbreak();
|
|---|
| 1687 | pObj->Stats.st_ino = uBuf.WithId.FileId.QuadPart;
|
|---|
| 1688 | /** @todo implement as needed. */
|
|---|
| 1689 | }
|
|---|
| 1690 |
|
|---|
| 1691 | pObj->Stats.st_size = uBuf.WithId.EndOfFile.QuadPart;
|
|---|
| 1692 | birdNtTimeToTimeSpec(uBuf.WithId.CreationTime.QuadPart, &pObj->Stats.st_birthtim);
|
|---|
| 1693 | birdNtTimeToTimeSpec(uBuf.WithId.ChangeTime.QuadPart, &pObj->Stats.st_ctim);
|
|---|
| 1694 | birdNtTimeToTimeSpec(uBuf.WithId.LastWriteTime.QuadPart, &pObj->Stats.st_mtim);
|
|---|
| 1695 | birdNtTimeToTimeSpec(uBuf.WithId.LastAccessTime.QuadPart, &pObj->Stats.st_atim);
|
|---|
| 1696 | pObj->Stats.st_attribs = uBuf.WithId.FileAttributes;
|
|---|
| 1697 | pObj->Stats.st_blksize = 65536;
|
|---|
| 1698 | pObj->Stats.st_blocks = (uBuf.WithId.AllocationSize.QuadPart + BIRD_STAT_BLOCK_SIZE - 1)
|
|---|
| 1699 | / BIRD_STAT_BLOCK_SIZE;
|
|---|
| 1700 | }
|
|---|
| 1701 | #endif
|
|---|
| 1702 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1703 | {
|
|---|
| 1704 | pObj->uCacheGen = pCache->uGeneration;
|
|---|
| 1705 | fRc = K_TRUE;
|
|---|
| 1706 | }
|
|---|
| 1707 | else
|
|---|
| 1708 | {
|
|---|
| 1709 | /* ouch! */
|
|---|
| 1710 | kHlpAssertMsgFailed(("%#x\n", rcNt));
|
|---|
| 1711 | __debugbreak();
|
|---|
| 1712 | fRc = K_FALSE;
|
|---|
| 1713 | }
|
|---|
| 1714 | }
|
|---|
| 1715 | else
|
|---|
| 1716 | {
|
|---|
| 1717 | /*
|
|---|
| 1718 | * An open directory. Query information via the handle, the
|
|---|
| 1719 | * file ID shouldn't have been able to change, so we can use
|
|---|
| 1720 | * NtQueryInformationFile. Right...
|
|---|
| 1721 | */
|
|---|
| 1722 | PKFSDIR pDir = (PKFSDIR)pObj;
|
|---|
| 1723 | Ios.Information = -1;
|
|---|
| 1724 | Ios.u.Status = -1;
|
|---|
| 1725 | rcNt = g_pfnNtQueryInformationFile(pDir->hDir, &Ios, &uBuf.FullInfo, sizeof(uBuf.FullInfo),
|
|---|
| 1726 | MyFileNetworkOpenInformation);
|
|---|
| 1727 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1728 | rcNt = Ios.u.Status;
|
|---|
| 1729 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1730 | {
|
|---|
| 1731 | pObj->Stats.st_size = uBuf.FullInfo.EndOfFile.QuadPart;
|
|---|
| 1732 | birdNtTimeToTimeSpec(uBuf.FullInfo.CreationTime.QuadPart, &pObj->Stats.st_birthtim);
|
|---|
| 1733 | birdNtTimeToTimeSpec(uBuf.FullInfo.ChangeTime.QuadPart, &pObj->Stats.st_ctim);
|
|---|
| 1734 | birdNtTimeToTimeSpec(uBuf.FullInfo.LastWriteTime.QuadPart, &pObj->Stats.st_mtim);
|
|---|
| 1735 | birdNtTimeToTimeSpec(uBuf.FullInfo.LastAccessTime.QuadPart, &pObj->Stats.st_atim);
|
|---|
| 1736 | pObj->Stats.st_attribs = uBuf.FullInfo.FileAttributes;
|
|---|
| 1737 | pObj->Stats.st_blksize = 65536;
|
|---|
| 1738 | pObj->Stats.st_blocks = (uBuf.FullInfo.AllocationSize.QuadPart + BIRD_STAT_BLOCK_SIZE - 1)
|
|---|
| 1739 | / BIRD_STAT_BLOCK_SIZE;
|
|---|
| 1740 |
|
|---|
| 1741 | if ( pDir->iLastWrite == uBuf.FullInfo.LastWriteTime.QuadPart
|
|---|
| 1742 | && (pObj->fFlags & KFSOBJ_F_WORKING_DIR_MTIME) )
|
|---|
| 1743 | KFSCACHE_LOG(("Refreshing %s/%s/ - no re-populating necessary.\n",
|
|---|
| 1744 | pObj->pParent->Obj.pszName, pObj->pszName));
|
|---|
| 1745 | else
|
|---|
| 1746 | {
|
|---|
| 1747 | KFSCACHE_LOG(("Refreshing %s/%s/ - needs re-populating...\n",
|
|---|
| 1748 | pObj->pParent->Obj.pszName, pObj->pszName));
|
|---|
| 1749 | pDir->fNeedRePopulating = K_TRUE;
|
|---|
| 1750 | #if 0
|
|---|
| 1751 | /* Refresh the link count. */
|
|---|
| 1752 | rcNt = g_pfnNtQueryInformationFile(pDir->hDir, &Ios, &StdInfo, sizeof(StdInfo), FileStandardInformation);
|
|---|
| 1753 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1754 | rcNt = Ios.s.Status;
|
|---|
| 1755 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1756 | pObj->Stats.st_nlink = StdInfo.NumberOfLinks;
|
|---|
| 1757 | #endif
|
|---|
| 1758 | }
|
|---|
| 1759 | }
|
|---|
| 1760 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1761 | {
|
|---|
| 1762 | pObj->uCacheGen = pCache->uGeneration;
|
|---|
| 1763 | fRc = K_TRUE;
|
|---|
| 1764 | }
|
|---|
| 1765 | else
|
|---|
| 1766 | {
|
|---|
| 1767 | /* ouch! */
|
|---|
| 1768 | kHlpAssertMsgFailed(("%#x\n", rcNt));
|
|---|
| 1769 | __debugbreak();
|
|---|
| 1770 | fRc = K_FALSE;
|
|---|
| 1771 | }
|
|---|
| 1772 | }
|
|---|
| 1773 | }
|
|---|
| 1774 |
|
|---|
| 1775 | return fRc;
|
|---|
| 1776 | }
|
|---|
| 1777 |
|
|---|
| 1778 |
|
|---|
| 1779 |
|
|---|
| 1780 | /**
|
|---|
| 1781 | * Looks up a drive letter.
|
|---|
| 1782 | *
|
|---|
| 1783 | * Will enter the drive if necessary.
|
|---|
| 1784 | *
|
|---|
| 1785 | * @returns Pointer to the root directory of the drive or an update-to-date
|
|---|
| 1786 | * missing node.
|
|---|
| 1787 | * @param pCache The cache.
|
|---|
| 1788 | * @param chLetter The uppercased drive letter.
|
|---|
| 1789 | * @param penmError Where to return details as to why the lookup
|
|---|
| 1790 | * failed.
|
|---|
| 1791 | */
|
|---|
| 1792 | static PKFSOBJ kFswCacheLookupDrive(PKFSCACHE pCache, char chLetter, KFSLOOKUPERROR *penmError)
|
|---|
| 1793 | {
|
|---|
| 1794 | KU32 const uHash = chLetter - 'A';
|
|---|
| 1795 | KU32 cLeft;
|
|---|
| 1796 | PKFSOBJ *ppCur;
|
|---|
| 1797 |
|
|---|
| 1798 | MY_UNICODE_STRING NtPath;
|
|---|
| 1799 | wchar_t wszTmp[8];
|
|---|
| 1800 | char szTmp[4];
|
|---|
| 1801 |
|
|---|
| 1802 | /*
|
|---|
| 1803 | * Custom drive letter hashing.
|
|---|
| 1804 | */
|
|---|
| 1805 | if (pCache->RootDir.paHashTab)
|
|---|
| 1806 | {
|
|---|
| 1807 | /** @todo PKFSOBJHASH pHash = */
|
|---|
| 1808 | }
|
|---|
| 1809 |
|
|---|
| 1810 | /*
|
|---|
| 1811 | * Special cased lookup.
|
|---|
| 1812 | */
|
|---|
| 1813 | cLeft = pCache->RootDir.cChildren;
|
|---|
| 1814 | ppCur = pCache->RootDir.papChildren;
|
|---|
| 1815 | while (cLeft-- > 0)
|
|---|
| 1816 | {
|
|---|
| 1817 | PKFSOBJ pCur = *ppCur++;
|
|---|
| 1818 | if ( pCur->cchName == 2
|
|---|
| 1819 | && pCur->pszName[0] == chLetter
|
|---|
| 1820 | && pCur->pszName[1] == ':')
|
|---|
| 1821 | {
|
|---|
| 1822 | if (pCur->bObjType == KFSOBJ_TYPE_DIR)
|
|---|
| 1823 | return pCur;
|
|---|
| 1824 | kHlpAssert(pCur->bObjType == KFSOBJ_TYPE_MISSING);
|
|---|
| 1825 | if (kFsCacheRefreshMissingIntermediateDir(pCache, pCur, penmError))
|
|---|
| 1826 | return pCur;
|
|---|
| 1827 | return NULL;
|
|---|
| 1828 | }
|
|---|
| 1829 | }
|
|---|
| 1830 |
|
|---|
| 1831 | /*
|
|---|
| 1832 | * Need to add it. We always keep the drive letters open for the benefit
|
|---|
| 1833 | * of kFsCachePopuplateOrRefreshDir and others.
|
|---|
| 1834 | */
|
|---|
| 1835 | wszTmp[0] = szTmp[0] = chLetter;
|
|---|
| 1836 | wszTmp[1] = szTmp[1] = ':';
|
|---|
| 1837 | wszTmp[2] = szTmp[2] = '\\';
|
|---|
| 1838 | wszTmp[3] = '.';
|
|---|
| 1839 | wszTmp[4] = '\0';
|
|---|
| 1840 | szTmp[2] = '\0';
|
|---|
| 1841 |
|
|---|
| 1842 | NtPath.Buffer = NULL;
|
|---|
| 1843 | NtPath.Length = 0;
|
|---|
| 1844 | NtPath.MaximumLength = 0;
|
|---|
| 1845 | if (g_pfnRtlDosPathNameToNtPathName_U(wszTmp, &NtPath, NULL, NULL))
|
|---|
| 1846 | {
|
|---|
| 1847 | HANDLE hDir;
|
|---|
| 1848 | MY_NTSTATUS rcNt;
|
|---|
| 1849 | rcNt = birdOpenFileUniStr(&NtPath,
|
|---|
| 1850 | FILE_READ_DATA | FILE_LIST_DIRECTORY | FILE_READ_ATTRIBUTES | SYNCHRONIZE,
|
|---|
| 1851 | FILE_ATTRIBUTE_NORMAL,
|
|---|
| 1852 | FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
|
|---|
| 1853 | FILE_OPEN,
|
|---|
| 1854 | FILE_DIRECTORY_FILE | FILE_OPEN_FOR_BACKUP_INTENT | FILE_SYNCHRONOUS_IO_NONALERT,
|
|---|
| 1855 | OBJ_CASE_INSENSITIVE,
|
|---|
| 1856 | &hDir);
|
|---|
| 1857 | birdFreeNtPath(&NtPath);
|
|---|
| 1858 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1859 | {
|
|---|
| 1860 | PKFSDIR pDir = (PKFSDIR)kFsCacheCreateObject(pCache, &pCache->RootDir, szTmp, 2, wszTmp, 2,
|
|---|
| 1861 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1862 | NULL, 0, NULL, 0,
|
|---|
| 1863 | #endif
|
|---|
| 1864 | KFSOBJ_TYPE_DIR, penmError);
|
|---|
| 1865 | if (pDir)
|
|---|
| 1866 | {
|
|---|
| 1867 | /*
|
|---|
| 1868 | * We need a little bit of extra info for a drive root. These things are typically
|
|---|
| 1869 | * inherited by subdirectories down the tree, so, we do it all here for till that changes.
|
|---|
| 1870 | */
|
|---|
| 1871 | union
|
|---|
| 1872 | {
|
|---|
| 1873 | MY_FILE_FS_VOLUME_INFORMATION VolInfo;
|
|---|
| 1874 | MY_FILE_FS_ATTRIBUTE_INFORMATION FsAttrInfo;
|
|---|
| 1875 | char abPadding[sizeof(MY_FILE_FS_VOLUME_INFORMATION) + 512];
|
|---|
| 1876 | } uBuf;
|
|---|
| 1877 | MY_IO_STATUS_BLOCK Ios;
|
|---|
| 1878 | KBOOL fRc;
|
|---|
| 1879 |
|
|---|
| 1880 | kHlpAssert(pDir->hDir == INVALID_HANDLE_VALUE);
|
|---|
| 1881 | pDir->hDir = hDir;
|
|---|
| 1882 |
|
|---|
| 1883 | if (birdStatHandle(hDir, &pDir->Obj.Stats, pDir->Obj.pszName) == 0)
|
|---|
| 1884 | {
|
|---|
| 1885 | pDir->Obj.fHaveStats = K_TRUE;
|
|---|
| 1886 | pDir->uDevNo = pDir->Obj.Stats.st_dev;
|
|---|
| 1887 | }
|
|---|
| 1888 | else
|
|---|
| 1889 | {
|
|---|
| 1890 | /* Just in case. */
|
|---|
| 1891 | pDir->Obj.fHaveStats = K_FALSE;
|
|---|
| 1892 | rcNt = birdQueryVolumeDeviceNumber(hDir, &uBuf.VolInfo, sizeof(uBuf), &pDir->uDevNo);
|
|---|
| 1893 | kHlpAssertMsg(MY_NT_SUCCESS(rcNt), ("%#x\n", rcNt));
|
|---|
| 1894 | }
|
|---|
| 1895 |
|
|---|
| 1896 | /* Get the file system. */
|
|---|
| 1897 | pDir->Obj.fFlags &= ~(KFSOBJ_F_NTFS | KFSOBJ_F_WORKING_DIR_MTIME);
|
|---|
| 1898 | Ios.Information = -1;
|
|---|
| 1899 | Ios.u.Status = -1;
|
|---|
| 1900 | rcNt = g_pfnNtQueryVolumeInformationFile(hDir, &Ios, &uBuf.FsAttrInfo, sizeof(uBuf),
|
|---|
| 1901 | MyFileFsAttributeInformation);
|
|---|
| 1902 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1903 | rcNt = Ios.u.Status;
|
|---|
| 1904 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 1905 | {
|
|---|
| 1906 | if ( uBuf.FsAttrInfo.FileSystemName[0] == 'N'
|
|---|
| 1907 | && uBuf.FsAttrInfo.FileSystemName[1] == 'T'
|
|---|
| 1908 | && uBuf.FsAttrInfo.FileSystemName[2] == 'F'
|
|---|
| 1909 | && uBuf.FsAttrInfo.FileSystemName[3] == 'S'
|
|---|
| 1910 | && uBuf.FsAttrInfo.FileSystemName[4] == '\0')
|
|---|
| 1911 | {
|
|---|
| 1912 | DWORD dwDriveType = GetDriveTypeW(wszTmp);
|
|---|
| 1913 | if ( dwDriveType == DRIVE_FIXED
|
|---|
| 1914 | || dwDriveType == DRIVE_RAMDISK)
|
|---|
| 1915 | pDir->Obj.fFlags |= KFSOBJ_F_NTFS | KFSOBJ_F_WORKING_DIR_MTIME;
|
|---|
| 1916 | }
|
|---|
| 1917 | }
|
|---|
| 1918 |
|
|---|
| 1919 | /*
|
|---|
| 1920 | * Link the new drive letter into the root dir.
|
|---|
| 1921 | */
|
|---|
| 1922 | fRc = kFsCacheDirAddChild(pCache, &pCache->RootDir, &pDir->Obj, penmError);
|
|---|
| 1923 | kFsCacheObjRelease(pCache, &pDir->Obj);
|
|---|
| 1924 | return fRc ? &pDir->Obj : NULL;
|
|---|
| 1925 | }
|
|---|
| 1926 |
|
|---|
| 1927 | g_pfnNtClose(hDir);
|
|---|
| 1928 | return NULL;
|
|---|
| 1929 | }
|
|---|
| 1930 |
|
|---|
| 1931 | /* Assume it doesn't exist if this happens... This may be a little to
|
|---|
| 1932 | restrictive wrt status code checks. */
|
|---|
| 1933 | kHlpAssertMsgStmtReturn( rcNt == MY_STATUS_OBJECT_NAME_NOT_FOUND
|
|---|
| 1934 | || rcNt == MY_STATUS_OBJECT_PATH_NOT_FOUND
|
|---|
| 1935 | || rcNt == MY_STATUS_OBJECT_PATH_INVALID
|
|---|
| 1936 | || rcNt == MY_STATUS_OBJECT_PATH_SYNTAX_BAD,
|
|---|
| 1937 | ("%#x\n", rcNt),
|
|---|
| 1938 | *penmError = KFSLOOKUPERROR_DIR_OPEN_ERROR,
|
|---|
| 1939 | NULL);
|
|---|
| 1940 | }
|
|---|
| 1941 | else
|
|---|
| 1942 | {
|
|---|
| 1943 | kHlpAssertFailed();
|
|---|
| 1944 | *penmError = KFSLOOKUPERROR_OUT_OF_MEMORY;
|
|---|
| 1945 | return NULL;
|
|---|
| 1946 | }
|
|---|
| 1947 |
|
|---|
| 1948 | /*
|
|---|
| 1949 | * Maybe create a missing entry.
|
|---|
| 1950 | */
|
|---|
| 1951 | if (pCache->fFlags & KFSCACHE_F_MISSING_OBJECTS)
|
|---|
| 1952 | {
|
|---|
| 1953 | PKFSOBJ pMissing = kFsCacheCreateObject(pCache, &pCache->RootDir, szTmp, 2, wszTmp, 2,
|
|---|
| 1954 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 1955 | NULL, 0, NULL, 0,
|
|---|
| 1956 | #endif
|
|---|
| 1957 | KFSOBJ_TYPE_MISSING, penmError);
|
|---|
| 1958 | if (pMissing)
|
|---|
| 1959 | {
|
|---|
| 1960 | KBOOL fRc = kFsCacheDirAddChild(pCache, &pCache->RootDir, pMissing, penmError);
|
|---|
| 1961 | kFsCacheObjRelease(pCache, pMissing);
|
|---|
| 1962 | return fRc ? pMissing : NULL;
|
|---|
| 1963 | }
|
|---|
| 1964 | }
|
|---|
| 1965 | else
|
|---|
| 1966 | {
|
|---|
| 1967 | /** @todo this isn't necessary correct for a root spec. */
|
|---|
| 1968 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_FOUND;
|
|---|
| 1969 | }
|
|---|
| 1970 | return NULL;
|
|---|
| 1971 | }
|
|---|
| 1972 |
|
|---|
| 1973 |
|
|---|
| 1974 | /**
|
|---|
| 1975 | * Look up a child node, ANSI version.
|
|---|
| 1976 | *
|
|---|
| 1977 | * @returns Pointer to the child if found, NULL if not.
|
|---|
| 1978 | * @param pCache The cache.
|
|---|
| 1979 | * @param pParent The parent directory to search.
|
|---|
| 1980 | * @param pchName The child name to search for (not terminated).
|
|---|
| 1981 | * @param cchName The length of the child name.
|
|---|
| 1982 | */
|
|---|
| 1983 | static PKFSOBJ kFsCacheFindChildA(PKFSCACHE pCache, PKFSDIR pParent, const char *pchName, KU32 cchName)
|
|---|
| 1984 | {
|
|---|
| 1985 | /* Check for '.' first. */
|
|---|
| 1986 | if (cchName != 1 || *pchName != '.')
|
|---|
| 1987 | {
|
|---|
| 1988 | KU32 cLeft;
|
|---|
| 1989 | PKFSOBJ *ppCur;
|
|---|
| 1990 |
|
|---|
| 1991 | if (pParent->paHashTab != NULL)
|
|---|
| 1992 | {
|
|---|
| 1993 | /** @todo directory hash table lookup. */
|
|---|
| 1994 | }
|
|---|
| 1995 |
|
|---|
| 1996 | /* Linear search. */
|
|---|
| 1997 | cLeft = pParent->cChildren;
|
|---|
| 1998 | ppCur = pParent->papChildren;
|
|---|
| 1999 | while (cLeft-- > 0)
|
|---|
| 2000 | {
|
|---|
| 2001 | PKFSOBJ pCur = *ppCur++;
|
|---|
| 2002 | if ( ( pCur->cchName == cchName
|
|---|
| 2003 | && _mbsnicmp(pCur->pszName, pchName, cchName) == 0)
|
|---|
| 2004 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 2005 | || ( pCur->cchShortName == cchName
|
|---|
| 2006 | && pCur->pszShortName != pCur->pszName
|
|---|
| 2007 | && _mbsnicmp(pCur->pszShortName, pchName, cchName) == 0)
|
|---|
| 2008 | #endif
|
|---|
| 2009 | )
|
|---|
| 2010 | return pCur;
|
|---|
| 2011 | }
|
|---|
| 2012 | return NULL;
|
|---|
| 2013 | }
|
|---|
| 2014 | return &pParent->Obj;
|
|---|
| 2015 | }
|
|---|
| 2016 |
|
|---|
| 2017 |
|
|---|
| 2018 | /**
|
|---|
| 2019 | * Look up a child node, UTF-16 version.
|
|---|
| 2020 | *
|
|---|
| 2021 | * @returns Pointer to the child if found, NULL if not.
|
|---|
| 2022 | * @param pCache The cache.
|
|---|
| 2023 | * @param pParent The parent directory to search.
|
|---|
| 2024 | * @param pwcName The child name to search for (not terminated).
|
|---|
| 2025 | * @param cwcName The length of the child name (in wchar_t's).
|
|---|
| 2026 | */
|
|---|
| 2027 | static PKFSOBJ kFsCacheFindChildW(PKFSCACHE pCache, PKFSDIR pParent, const wchar_t *pwcName, KU32 cwcName)
|
|---|
| 2028 | {
|
|---|
| 2029 | /* Check for '.' first. */
|
|---|
| 2030 | if (cwcName != 1 || *pwcName != '.')
|
|---|
| 2031 | {
|
|---|
| 2032 | KU32 cLeft;
|
|---|
| 2033 | PKFSOBJ *ppCur;
|
|---|
| 2034 |
|
|---|
| 2035 | if (pParent->paHashTab != NULL)
|
|---|
| 2036 | {
|
|---|
| 2037 | /** @todo directory hash table lookup. */
|
|---|
| 2038 | }
|
|---|
| 2039 |
|
|---|
| 2040 | /* Linear search. */
|
|---|
| 2041 | cLeft = pParent->cChildren;
|
|---|
| 2042 | ppCur = pParent->papChildren;
|
|---|
| 2043 | while (cLeft-- > 0)
|
|---|
| 2044 | {
|
|---|
| 2045 | PKFSOBJ pCur = *ppCur++;
|
|---|
| 2046 | if ( ( pCur->cwcName == cwcName
|
|---|
| 2047 | && kFsCacheIAreEqualW(pCur->pwszName, pwcName, cwcName))
|
|---|
| 2048 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 2049 | || ( pCur->cwcShortName == cwcName
|
|---|
| 2050 | && pCur->pwszShortName != pCur->pwszName
|
|---|
| 2051 | && kFsCacheIAreEqualW(pCur->pwszShortName, pwcName, cwcName))
|
|---|
| 2052 | #endif
|
|---|
| 2053 | )
|
|---|
| 2054 | return pCur;
|
|---|
| 2055 | }
|
|---|
| 2056 | return NULL;
|
|---|
| 2057 | }
|
|---|
| 2058 | return &pParent->Obj;
|
|---|
| 2059 | }
|
|---|
| 2060 |
|
|---|
| 2061 |
|
|---|
| 2062 | /**
|
|---|
| 2063 | * Looks up a UNC share, ANSI version.
|
|---|
| 2064 | *
|
|---|
| 2065 | * We keep both the server and share in the root directory entry. This means we
|
|---|
| 2066 | * have to clean up the entry name before we can insert it.
|
|---|
| 2067 | *
|
|---|
| 2068 | * @returns Pointer to the share root directory or an update-to-date missing
|
|---|
| 2069 | * node.
|
|---|
| 2070 | * @param pCache The cache.
|
|---|
| 2071 | * @param pszPath The path.
|
|---|
| 2072 | * @param poff Where to return the root dire.
|
|---|
| 2073 | * @param penmError Where to return details as to why the lookup
|
|---|
| 2074 | * failed.
|
|---|
| 2075 | */
|
|---|
| 2076 | static PKFSOBJ kFswCacheLookupUncShareA(PKFSCACHE pCache, const char *pszPath, KU32 *poff, KFSLOOKUPERROR *penmError)
|
|---|
| 2077 | {
|
|---|
| 2078 | #if 0 /* later */
|
|---|
| 2079 | KU32 offStartServer;
|
|---|
| 2080 | KU32 offEndServer;
|
|---|
| 2081 | KU32 offStartShare;
|
|---|
| 2082 |
|
|---|
| 2083 | KU32 offEnd = 2;
|
|---|
| 2084 | while (IS_SLASH(pszPath[offEnd]))
|
|---|
| 2085 | offEnd++;
|
|---|
| 2086 |
|
|---|
| 2087 | offStartServer = offEnd;
|
|---|
| 2088 | while ( (ch = pszPath[offEnd]) != '\0'
|
|---|
| 2089 | && !IS_SLASH(ch))
|
|---|
| 2090 | offEnd++;
|
|---|
| 2091 | offEndServer = offEnd;
|
|---|
| 2092 |
|
|---|
| 2093 | if (ch != '\0')
|
|---|
| 2094 | { /* likely */ }
|
|---|
| 2095 | else
|
|---|
| 2096 | {
|
|---|
| 2097 | *penmError = KFSLOOKUPERROR_NOT_FOUND;
|
|---|
| 2098 | return NULL;
|
|---|
| 2099 | }
|
|---|
| 2100 |
|
|---|
| 2101 | while (IS_SLASH(pszPath[offEnd]))
|
|---|
| 2102 | offEnd++;
|
|---|
| 2103 | offStartServer = offEnd;
|
|---|
| 2104 | while ( (ch = pszPath[offEnd]) != '\0'
|
|---|
| 2105 | && !IS_SLASH(ch))
|
|---|
| 2106 | offEnd++;
|
|---|
| 2107 | #endif
|
|---|
| 2108 | *penmError = KFSLOOKUPERROR_UNSUPPORTED;
|
|---|
| 2109 | return NULL;
|
|---|
| 2110 | }
|
|---|
| 2111 |
|
|---|
| 2112 |
|
|---|
| 2113 | /**
|
|---|
| 2114 | * Looks up a UNC share, UTF-16 version.
|
|---|
| 2115 | *
|
|---|
| 2116 | * We keep both the server and share in the root directory entry. This means we
|
|---|
| 2117 | * have to clean up the entry name before we can insert it.
|
|---|
| 2118 | *
|
|---|
| 2119 | * @returns Pointer to the share root directory or an update-to-date missing
|
|---|
| 2120 | * node.
|
|---|
| 2121 | * @param pCache The cache.
|
|---|
| 2122 | * @param pwszPath The path.
|
|---|
| 2123 | * @param poff Where to return the root dire.
|
|---|
| 2124 | * @param penmError Where to return details as to why the lookup
|
|---|
| 2125 | * failed.
|
|---|
| 2126 | */
|
|---|
| 2127 | static PKFSOBJ kFswCacheLookupUncShareW(PKFSCACHE pCache, const wchar_t *pwszPath, KU32 *poff, KFSLOOKUPERROR *penmError)
|
|---|
| 2128 | {
|
|---|
| 2129 | #if 0 /* later */
|
|---|
| 2130 | KU32 offStartServer;
|
|---|
| 2131 | KU32 offEndServer;
|
|---|
| 2132 | KU32 offStartShare;
|
|---|
| 2133 |
|
|---|
| 2134 | KU32 offEnd = 2;
|
|---|
| 2135 | while (IS_SLASH(pwszPath[offEnd]))
|
|---|
| 2136 | offEnd++;
|
|---|
| 2137 |
|
|---|
| 2138 | offStartServer = offEnd;
|
|---|
| 2139 | while ( (ch = pwszPath[offEnd]) != '\0'
|
|---|
| 2140 | && !IS_SLASH(ch))
|
|---|
| 2141 | offEnd++;
|
|---|
| 2142 | offEndServer = offEnd;
|
|---|
| 2143 |
|
|---|
| 2144 | if (ch != '\0')
|
|---|
| 2145 | { /* likely */ }
|
|---|
| 2146 | else
|
|---|
| 2147 | {
|
|---|
| 2148 | *penmError = KFSLOOKUPERROR_NOT_FOUND;
|
|---|
| 2149 | return NULL;
|
|---|
| 2150 | }
|
|---|
| 2151 |
|
|---|
| 2152 | while (IS_SLASH(pwszPath[offEnd]))
|
|---|
| 2153 | offEnd++;
|
|---|
| 2154 | offStartServer = offEnd;
|
|---|
| 2155 | while ( (ch = pwszPath[offEnd]) != '\0'
|
|---|
| 2156 | && !IS_SLASH(ch))
|
|---|
| 2157 | offEnd++;
|
|---|
| 2158 | #endif
|
|---|
| 2159 | *penmError = KFSLOOKUPERROR_UNSUPPORTED;
|
|---|
| 2160 | return NULL;
|
|---|
| 2161 | }
|
|---|
| 2162 |
|
|---|
| 2163 |
|
|---|
| 2164 | /**
|
|---|
| 2165 | * Walks an full path relative to the given directory, ANSI version.
|
|---|
| 2166 | *
|
|---|
| 2167 | * This will create any missing nodes while walking.
|
|---|
| 2168 | *
|
|---|
| 2169 | * The caller will have to do the path hash table insertion of the result.
|
|---|
| 2170 | *
|
|---|
| 2171 | * @returns Pointer to the tree node corresponding to @a pszPath.
|
|---|
| 2172 | * NULL on lookup failure, see @a penmError for details.
|
|---|
| 2173 | * @param pCache The cache.
|
|---|
| 2174 | * @param pParent The directory to start the lookup in.
|
|---|
| 2175 | * @param pszPath The path to walk.
|
|---|
| 2176 | * @param cchPath The length of the path.
|
|---|
| 2177 | * @param penmError Where to return details as to why the lookup
|
|---|
| 2178 | * failed.
|
|---|
| 2179 | */
|
|---|
| 2180 | PKFSOBJ kFsCacheLookupRelativeToDirA(PKFSCACHE pCache, PKFSDIR pParent, const char *pszPath, KU32 cchPath,
|
|---|
| 2181 | KFSLOOKUPERROR *penmError)
|
|---|
| 2182 | {
|
|---|
| 2183 | /*
|
|---|
| 2184 | * Walk loop.
|
|---|
| 2185 | */
|
|---|
| 2186 | KU32 off = 0;
|
|---|
| 2187 | for (;;)
|
|---|
| 2188 | {
|
|---|
| 2189 | PKFSOBJ pChild;
|
|---|
| 2190 |
|
|---|
| 2191 | /*
|
|---|
| 2192 | * Find the end of the component, counting trailing slashes.
|
|---|
| 2193 | */
|
|---|
| 2194 | char ch;
|
|---|
| 2195 | KU32 cchSlashes = 0;
|
|---|
| 2196 | KU32 offEnd = off + 1;
|
|---|
| 2197 | while ((ch = pszPath[offEnd]) != '\0')
|
|---|
| 2198 | {
|
|---|
| 2199 | if (!IS_SLASH(ch))
|
|---|
| 2200 | offEnd++;
|
|---|
| 2201 | else
|
|---|
| 2202 | {
|
|---|
| 2203 | do
|
|---|
| 2204 | cchSlashes++;
|
|---|
| 2205 | while (IS_SLASH(pszPath[offEnd + cchSlashes]));
|
|---|
| 2206 | break;
|
|---|
| 2207 | }
|
|---|
| 2208 | }
|
|---|
| 2209 |
|
|---|
| 2210 | /*
|
|---|
| 2211 | * Do we need to populate or refresh this directory first?
|
|---|
| 2212 | */
|
|---|
| 2213 | if ( pParent->fPopulated
|
|---|
| 2214 | && ( pParent->Obj.uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 2215 | || pParent->Obj.uCacheGen == pCache->uGeneration) )
|
|---|
| 2216 | { /* likely */ }
|
|---|
| 2217 | else if (kFsCachePopuplateOrRefreshDir(pCache, pParent, penmError))
|
|---|
| 2218 | { /* likely */ }
|
|---|
| 2219 | else
|
|---|
| 2220 | return NULL;
|
|---|
| 2221 |
|
|---|
| 2222 | /*
|
|---|
| 2223 | * Search the current node for the name.
|
|---|
| 2224 | *
|
|---|
| 2225 | * If we don't find it, we may insert a missing node depending on
|
|---|
| 2226 | * the cache configuration.
|
|---|
| 2227 | */
|
|---|
| 2228 | pChild = kFsCacheFindChildA(pCache, pParent, &pszPath[off], offEnd - off);
|
|---|
| 2229 | if (pChild != NULL)
|
|---|
| 2230 | { /* probably likely */ }
|
|---|
| 2231 | else
|
|---|
| 2232 | {
|
|---|
| 2233 | if (pCache->fFlags & KFSCACHE_F_MISSING_OBJECTS)
|
|---|
| 2234 | pChild = kFsCacheCreateMissingA(pCache, pParent, &pszPath[off], offEnd - off, penmError);
|
|---|
| 2235 | if (cchSlashes == 0 || offEnd + cchSlashes >= cchPath)
|
|---|
| 2236 | {
|
|---|
| 2237 | if (pChild)
|
|---|
| 2238 | return kFsCacheObjRetainInternal(pChild);
|
|---|
| 2239 | *penmError = KFSLOOKUPERROR_NOT_FOUND;
|
|---|
| 2240 | }
|
|---|
| 2241 | else
|
|---|
| 2242 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_FOUND;
|
|---|
| 2243 | return NULL;
|
|---|
| 2244 | }
|
|---|
| 2245 |
|
|---|
| 2246 | /* Advance off and check if we're done already. */
|
|---|
| 2247 | off = offEnd + cchSlashes;
|
|---|
| 2248 | if ( cchSlashes == 0
|
|---|
| 2249 | || off >= cchPath)
|
|---|
| 2250 | {
|
|---|
| 2251 | if ( pChild->bObjType != KFSOBJ_TYPE_MISSING
|
|---|
| 2252 | || pChild->uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 2253 | || pChild->uCacheGen == pCache->uGenerationMissing
|
|---|
| 2254 | || kFsCacheRefreshMissing(pCache, pChild, penmError) )
|
|---|
| 2255 | { /* likely */ }
|
|---|
| 2256 | else
|
|---|
| 2257 | return NULL;
|
|---|
| 2258 | return kFsCacheObjRetainInternal(pChild);
|
|---|
| 2259 | }
|
|---|
| 2260 |
|
|---|
| 2261 | /*
|
|---|
| 2262 | * Check that it's a directory. If a missing entry, we may have to
|
|---|
| 2263 | * refresh it and re-examin it.
|
|---|
| 2264 | */
|
|---|
| 2265 | if (pChild->bObjType == KFSOBJ_TYPE_DIR)
|
|---|
| 2266 | pParent = (PKFSDIR)pChild;
|
|---|
| 2267 | else if (pChild->bObjType != KFSOBJ_TYPE_MISSING)
|
|---|
| 2268 | {
|
|---|
| 2269 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_DIR;
|
|---|
| 2270 | return NULL;
|
|---|
| 2271 | }
|
|---|
| 2272 | else if ( pChild->uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 2273 | || pChild->uCacheGen == pCache->uGenerationMissing)
|
|---|
| 2274 | {
|
|---|
| 2275 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_FOUND;
|
|---|
| 2276 | return NULL;
|
|---|
| 2277 | }
|
|---|
| 2278 | else if (kFsCacheRefreshMissingIntermediateDir(pCache, pChild, penmError))
|
|---|
| 2279 | pParent = (PKFSDIR)pChild;
|
|---|
| 2280 | else
|
|---|
| 2281 | return NULL;
|
|---|
| 2282 | }
|
|---|
| 2283 |
|
|---|
| 2284 | return NULL;
|
|---|
| 2285 |
|
|---|
| 2286 | }
|
|---|
| 2287 |
|
|---|
| 2288 |
|
|---|
| 2289 | /**
|
|---|
| 2290 | * Walks an full path relative to the given directory, UTF-16 version.
|
|---|
| 2291 | *
|
|---|
| 2292 | * This will create any missing nodes while walking.
|
|---|
| 2293 | *
|
|---|
| 2294 | * The caller will have to do the path hash table insertion of the result.
|
|---|
| 2295 | *
|
|---|
| 2296 | * @returns Pointer to the tree node corresponding to @a pszPath.
|
|---|
| 2297 | * NULL on lookup failure, see @a penmError for details.
|
|---|
| 2298 | * @param pCache The cache.
|
|---|
| 2299 | * @param pParent The directory to start the lookup in.
|
|---|
| 2300 | * @param pszPath The path to walk. No dot-dot bits allowed!
|
|---|
| 2301 | * @param cchPath The length of the path.
|
|---|
| 2302 | * @param penmError Where to return details as to why the lookup
|
|---|
| 2303 | * failed.
|
|---|
| 2304 | */
|
|---|
| 2305 | PKFSOBJ kFsCacheLookupRelativeToDirW(PKFSCACHE pCache, PKFSDIR pParent, const wchar_t *pwszPath, KU32 cwcPath,
|
|---|
| 2306 | KFSLOOKUPERROR *penmError)
|
|---|
| 2307 | {
|
|---|
| 2308 | /*
|
|---|
| 2309 | * Walk loop.
|
|---|
| 2310 | */
|
|---|
| 2311 | KU32 off = 0;
|
|---|
| 2312 | for (;;)
|
|---|
| 2313 | {
|
|---|
| 2314 | PKFSOBJ pChild;
|
|---|
| 2315 |
|
|---|
| 2316 | /*
|
|---|
| 2317 | * Find the end of the component, counting trailing slashes.
|
|---|
| 2318 | */
|
|---|
| 2319 | wchar_t wc;
|
|---|
| 2320 | KU32 cwcSlashes = 0;
|
|---|
| 2321 | KU32 offEnd = off + 1;
|
|---|
| 2322 | while ((wc = pwszPath[offEnd]) != '\0')
|
|---|
| 2323 | {
|
|---|
| 2324 | if (!IS_SLASH(wc))
|
|---|
| 2325 | offEnd++;
|
|---|
| 2326 | else
|
|---|
| 2327 | {
|
|---|
| 2328 | do
|
|---|
| 2329 | cwcSlashes++;
|
|---|
| 2330 | while (IS_SLASH(pwszPath[offEnd + cwcSlashes]));
|
|---|
| 2331 | break;
|
|---|
| 2332 | }
|
|---|
| 2333 | }
|
|---|
| 2334 |
|
|---|
| 2335 | /*
|
|---|
| 2336 | * Do we need to populate or refresh this directory first?
|
|---|
| 2337 | */
|
|---|
| 2338 | if ( pParent->fPopulated
|
|---|
| 2339 | && ( pParent->Obj.uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 2340 | || pParent->Obj.uCacheGen == pCache->uGeneration) )
|
|---|
| 2341 | { /* likely */ }
|
|---|
| 2342 | else if (kFsCachePopuplateOrRefreshDir(pCache, pParent, penmError))
|
|---|
| 2343 | { /* likely */ }
|
|---|
| 2344 | else
|
|---|
| 2345 | return NULL;
|
|---|
| 2346 |
|
|---|
| 2347 | /*
|
|---|
| 2348 | * Search the current node for the name.
|
|---|
| 2349 | *
|
|---|
| 2350 | * If we don't find it, we may insert a missing node depending on
|
|---|
| 2351 | * the cache configuration.
|
|---|
| 2352 | */
|
|---|
| 2353 | pChild = kFsCacheFindChildW(pCache, pParent, &pwszPath[off], offEnd - off);
|
|---|
| 2354 | if (pChild != NULL)
|
|---|
| 2355 | { /* probably likely */ }
|
|---|
| 2356 | else
|
|---|
| 2357 | {
|
|---|
| 2358 | if (pCache->fFlags & KFSCACHE_F_MISSING_OBJECTS)
|
|---|
| 2359 | pChild = kFsCacheCreateMissingW(pCache, pParent, &pwszPath[off], offEnd - off, penmError);
|
|---|
| 2360 | if (cwcSlashes == 0 || offEnd + cwcSlashes >= cwcPath)
|
|---|
| 2361 | {
|
|---|
| 2362 | if (pChild)
|
|---|
| 2363 | return kFsCacheObjRetainInternal(pChild);
|
|---|
| 2364 | *penmError = KFSLOOKUPERROR_NOT_FOUND;
|
|---|
| 2365 | }
|
|---|
| 2366 | else
|
|---|
| 2367 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_FOUND;
|
|---|
| 2368 | return NULL;
|
|---|
| 2369 | }
|
|---|
| 2370 |
|
|---|
| 2371 | /* Advance off and check if we're done already. */
|
|---|
| 2372 | off = offEnd + cwcSlashes;
|
|---|
| 2373 | if ( cwcSlashes == 0
|
|---|
| 2374 | || off >= cwcPath)
|
|---|
| 2375 | {
|
|---|
| 2376 | if ( pChild->bObjType != KFSOBJ_TYPE_MISSING
|
|---|
| 2377 | || pChild->uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 2378 | || pChild->uCacheGen == pCache->uGenerationMissing
|
|---|
| 2379 | || kFsCacheRefreshMissing(pCache, pChild, penmError) )
|
|---|
| 2380 | { /* likely */ }
|
|---|
| 2381 | else
|
|---|
| 2382 | return NULL;
|
|---|
| 2383 | return kFsCacheObjRetainInternal(pChild);
|
|---|
| 2384 | }
|
|---|
| 2385 |
|
|---|
| 2386 | /*
|
|---|
| 2387 | * Check that it's a directory. If a missing entry, we may have to
|
|---|
| 2388 | * refresh it and re-examin it.
|
|---|
| 2389 | */
|
|---|
| 2390 | if (pChild->bObjType == KFSOBJ_TYPE_DIR)
|
|---|
| 2391 | pParent = (PKFSDIR)pChild;
|
|---|
| 2392 | else if (pChild->bObjType != KFSOBJ_TYPE_MISSING)
|
|---|
| 2393 | {
|
|---|
| 2394 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_DIR;
|
|---|
| 2395 | return NULL;
|
|---|
| 2396 | }
|
|---|
| 2397 | else if ( pChild->uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 2398 | || pChild->uCacheGen == pCache->uGenerationMissing)
|
|---|
| 2399 | {
|
|---|
| 2400 | *penmError = KFSLOOKUPERROR_PATH_COMP_NOT_FOUND;
|
|---|
| 2401 | return NULL;
|
|---|
| 2402 | }
|
|---|
| 2403 | else if (kFsCacheRefreshMissingIntermediateDir(pCache, pChild, penmError))
|
|---|
| 2404 | pParent = (PKFSDIR)pChild;
|
|---|
| 2405 | else
|
|---|
| 2406 | return NULL;
|
|---|
| 2407 | }
|
|---|
| 2408 |
|
|---|
| 2409 | return NULL;
|
|---|
| 2410 |
|
|---|
| 2411 | }
|
|---|
| 2412 |
|
|---|
| 2413 | /**
|
|---|
| 2414 | * Walk the file system tree for the given absolute path, entering it into the
|
|---|
| 2415 | * hash table.
|
|---|
| 2416 | *
|
|---|
| 2417 | * This will create any missing nodes while walking.
|
|---|
| 2418 | *
|
|---|
| 2419 | * The caller will have to do the path hash table insertion of the result.
|
|---|
| 2420 | *
|
|---|
| 2421 | * @returns Pointer to the tree node corresponding to @a pszPath.
|
|---|
| 2422 | * NULL on lookup failure, see @a penmError for details.
|
|---|
| 2423 | * @param pCache The cache.
|
|---|
| 2424 | * @param pszPath The path to walk. No dot-dot bits allowed!
|
|---|
| 2425 | * @param cchPath The length of the path.
|
|---|
| 2426 | * @param penmError Where to return details as to why the lookup
|
|---|
| 2427 | * failed.
|
|---|
| 2428 | */
|
|---|
| 2429 | static PKFSOBJ kFsCacheLookupAbsoluteA(PKFSCACHE pCache, const char *pszPath, KU32 cchPath, KFSLOOKUPERROR *penmError)
|
|---|
| 2430 | {
|
|---|
| 2431 | PKFSOBJ pChild;
|
|---|
| 2432 | KU32 cchSlashes;
|
|---|
| 2433 | KU32 offEnd;
|
|---|
| 2434 |
|
|---|
| 2435 | KFSCACHE_LOG2(("kFsCacheLookupAbsoluteA(%s)\n", pszPath));
|
|---|
| 2436 |
|
|---|
| 2437 | /*
|
|---|
| 2438 | * The root "directory" needs special handling, so we keep it outside the
|
|---|
| 2439 | * main search loop. (Special: Cannot enumerate it, UNCs, ++.)
|
|---|
| 2440 | */
|
|---|
| 2441 | cchSlashes = 0;
|
|---|
| 2442 | if ( pszPath[1] == ':'
|
|---|
| 2443 | && IS_ALPHA(pszPath[0]))
|
|---|
| 2444 | {
|
|---|
| 2445 | /* Drive letter. */
|
|---|
| 2446 | offEnd = 2;
|
|---|
| 2447 | kHlpAssert(IS_SLASH(pszPath[2]));
|
|---|
| 2448 | pChild = kFswCacheLookupDrive(pCache, toupper(pszPath[0]), penmError);
|
|---|
| 2449 | }
|
|---|
| 2450 | else if ( IS_SLASH(pszPath[0])
|
|---|
| 2451 | && IS_SLASH(pszPath[1]) )
|
|---|
| 2452 | pChild = kFswCacheLookupUncShareA(pCache, pszPath, &offEnd, penmError);
|
|---|
| 2453 | else
|
|---|
| 2454 | {
|
|---|
| 2455 | *penmError = KFSLOOKUPERROR_UNSUPPORTED;
|
|---|
| 2456 | return NULL;
|
|---|
| 2457 | }
|
|---|
| 2458 | if (pChild)
|
|---|
| 2459 | { /* likely */ }
|
|---|
| 2460 | else
|
|---|
| 2461 | return NULL;
|
|---|
| 2462 |
|
|---|
| 2463 | /* Count slashes trailing the root spec. */
|
|---|
| 2464 | if (offEnd < cchPath)
|
|---|
| 2465 | {
|
|---|
| 2466 | kHlpAssert(IS_SLASH(pszPath[offEnd]));
|
|---|
| 2467 | do
|
|---|
| 2468 | cchSlashes++;
|
|---|
| 2469 | while (IS_SLASH(pszPath[offEnd + cchSlashes]));
|
|---|
| 2470 | }
|
|---|
| 2471 |
|
|---|
| 2472 | /* Done already? */
|
|---|
| 2473 | if (offEnd >= cchPath)
|
|---|
| 2474 | {
|
|---|
| 2475 | if ( pChild->uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 2476 | || pChild->uCacheGen == (pChild->bObjType != KFSOBJ_TYPE_MISSING ? pCache->uGeneration : pCache->uGenerationMissing)
|
|---|
| 2477 | || kFsCacheRefreshObj(pCache, pChild, penmError))
|
|---|
| 2478 | return kFsCacheObjRetainInternal(pChild);
|
|---|
| 2479 | return NULL;
|
|---|
| 2480 | }
|
|---|
| 2481 |
|
|---|
| 2482 | /* Check that we've got a valid result and not a cached negative one. */
|
|---|
| 2483 | if (pChild->bObjType == KFSOBJ_TYPE_DIR)
|
|---|
| 2484 | { /* likely */ }
|
|---|
| 2485 | else
|
|---|
| 2486 | {
|
|---|
| 2487 | kHlpAssert(pChild->bObjType == KFSOBJ_TYPE_MISSING);
|
|---|
| 2488 | kHlpAssert(pChild->uCacheGen == KFSOBJ_CACHE_GEN_IGNORE || pChild->uCacheGen == pCache->uGenerationMissing);
|
|---|
| 2489 | return pChild;
|
|---|
| 2490 | }
|
|---|
| 2491 |
|
|---|
| 2492 | /*
|
|---|
| 2493 | * Now that we've found a valid root directory, lookup the
|
|---|
| 2494 | * remainder of the path starting with it.
|
|---|
| 2495 | */
|
|---|
| 2496 | return kFsCacheLookupRelativeToDirA(pCache, (PKFSDIR)pChild, &pszPath[offEnd + cchSlashes],
|
|---|
| 2497 | cchPath - offEnd - cchSlashes, penmError);
|
|---|
| 2498 | }
|
|---|
| 2499 |
|
|---|
| 2500 |
|
|---|
| 2501 | /**
|
|---|
| 2502 | * Walk the file system tree for the given absolute path, UTF-16 version.
|
|---|
| 2503 | *
|
|---|
| 2504 | * This will create any missing nodes while walking.
|
|---|
| 2505 | *
|
|---|
| 2506 | * The caller will have to do the path hash table insertion of the result.
|
|---|
| 2507 | *
|
|---|
| 2508 | * @returns Pointer to the tree node corresponding to @a pszPath.
|
|---|
| 2509 | * NULL on lookup failure, see @a penmError for details.
|
|---|
| 2510 | * @param pCache The cache.
|
|---|
| 2511 | * @param pwszPath The path to walk.
|
|---|
| 2512 | * @param cwcPath The length of the path (in wchar_t's).
|
|---|
| 2513 | * @param penmError Where to return details as to why the lookup
|
|---|
| 2514 | * failed.
|
|---|
| 2515 | */
|
|---|
| 2516 | static PKFSOBJ kFsCacheLookupAbsoluteW(PKFSCACHE pCache, const wchar_t *pwszPath, KU32 cwcPath, KFSLOOKUPERROR *penmError)
|
|---|
| 2517 | {
|
|---|
| 2518 | PKFSDIR pParent = &pCache->RootDir;
|
|---|
| 2519 | PKFSOBJ pChild;
|
|---|
| 2520 | KU32 off;
|
|---|
| 2521 | KU32 cwcSlashes;
|
|---|
| 2522 | KU32 offEnd;
|
|---|
| 2523 |
|
|---|
| 2524 | KFSCACHE_LOG2(("kFsCacheLookupAbsoluteW(%ls)\n", pwszPath));
|
|---|
| 2525 |
|
|---|
| 2526 | /*
|
|---|
| 2527 | * The root "directory" needs special handling, so we keep it outside the
|
|---|
| 2528 | * main search loop. (Special: Cannot enumerate it, UNCs, ++.)
|
|---|
| 2529 | */
|
|---|
| 2530 | cwcSlashes = 0;
|
|---|
| 2531 | off = 0;
|
|---|
| 2532 | if ( pwszPath[1] == ':'
|
|---|
| 2533 | && IS_ALPHA(pwszPath[0]))
|
|---|
| 2534 | {
|
|---|
| 2535 | /* Drive letter. */
|
|---|
| 2536 | offEnd = 2;
|
|---|
| 2537 | kHlpAssert(IS_SLASH(pwszPath[2]));
|
|---|
| 2538 | pChild = kFswCacheLookupDrive(pCache, toupper(pwszPath[0]), penmError);
|
|---|
| 2539 | }
|
|---|
| 2540 | else if ( IS_SLASH(pwszPath[0])
|
|---|
| 2541 | && IS_SLASH(pwszPath[1]) )
|
|---|
| 2542 | pChild = kFswCacheLookupUncShareW(pCache, pwszPath, &offEnd, penmError);
|
|---|
| 2543 | else
|
|---|
| 2544 | {
|
|---|
| 2545 | *penmError = KFSLOOKUPERROR_UNSUPPORTED;
|
|---|
| 2546 | return NULL;
|
|---|
| 2547 | }
|
|---|
| 2548 | if (pChild)
|
|---|
| 2549 | { /* likely */ }
|
|---|
| 2550 | else
|
|---|
| 2551 | return NULL;
|
|---|
| 2552 |
|
|---|
| 2553 | /* Count slashes trailing the root spec. */
|
|---|
| 2554 | if (offEnd < cwcPath)
|
|---|
| 2555 | {
|
|---|
| 2556 | kHlpAssert(IS_SLASH(pwszPath[offEnd]));
|
|---|
| 2557 | do
|
|---|
| 2558 | cwcSlashes++;
|
|---|
| 2559 | while (IS_SLASH(pwszPath[offEnd + cwcSlashes]));
|
|---|
| 2560 | }
|
|---|
| 2561 |
|
|---|
| 2562 | /* Done already? */
|
|---|
| 2563 | if (offEnd >= cwcPath)
|
|---|
| 2564 | {
|
|---|
| 2565 | if ( pChild->uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 2566 | || pChild->uCacheGen == (pChild->bObjType != KFSOBJ_TYPE_MISSING ? pCache->uGeneration : pCache->uGenerationMissing)
|
|---|
| 2567 | || kFsCacheRefreshObj(pCache, pChild, penmError))
|
|---|
| 2568 | return kFsCacheObjRetainInternal(pChild);
|
|---|
| 2569 | return NULL;
|
|---|
| 2570 | }
|
|---|
| 2571 |
|
|---|
| 2572 | /* Check that we've got a valid result and not a cached negative one. */
|
|---|
| 2573 | if (pChild->bObjType == KFSOBJ_TYPE_DIR)
|
|---|
| 2574 | { /* likely */ }
|
|---|
| 2575 | else
|
|---|
| 2576 | {
|
|---|
| 2577 | kHlpAssert(pChild->bObjType == KFSOBJ_TYPE_MISSING);
|
|---|
| 2578 | kHlpAssert(pChild->uCacheGen == KFSOBJ_CACHE_GEN_IGNORE || pChild->uCacheGen == pCache->uGenerationMissing);
|
|---|
| 2579 | return pChild;
|
|---|
| 2580 | }
|
|---|
| 2581 |
|
|---|
| 2582 | /*
|
|---|
| 2583 | * Now that we've found a valid root directory, lookup the
|
|---|
| 2584 | * remainder of the path starting with it.
|
|---|
| 2585 | */
|
|---|
| 2586 | return kFsCacheLookupRelativeToDirW(pCache, (PKFSDIR)pChild, &pwszPath[offEnd + cwcSlashes],
|
|---|
| 2587 | cwcPath - offEnd - cwcSlashes, penmError);
|
|---|
| 2588 | }
|
|---|
| 2589 |
|
|---|
| 2590 |
|
|---|
| 2591 | /**
|
|---|
| 2592 | * This deals with paths that are relative and paths that contains '..'
|
|---|
| 2593 | * elements, ANSI version.
|
|---|
| 2594 | *
|
|---|
| 2595 | * @returns Pointer to object corresponding to @a pszPath on success.
|
|---|
| 2596 | * NULL if this isn't a path we care to cache.
|
|---|
| 2597 | *
|
|---|
| 2598 | * @param pCache The cache.
|
|---|
| 2599 | * @param pszPath The path.
|
|---|
| 2600 | * @param cchPath The length of the path.
|
|---|
| 2601 | * @param penmError Where to return details as to why the lookup
|
|---|
| 2602 | * failed.
|
|---|
| 2603 | */
|
|---|
| 2604 | static PKFSOBJ kFsCacheLookupSlowA(PKFSCACHE pCache, const char *pszPath, KU32 cchPath, KFSLOOKUPERROR *penmError)
|
|---|
| 2605 | {
|
|---|
| 2606 | /*
|
|---|
| 2607 | * We just call GetFullPathNameA here to do the job as getcwd and _getdcwd
|
|---|
| 2608 | * ends up calling it anyway.
|
|---|
| 2609 | */
|
|---|
| 2610 | char szFull[KFSCACHE_CFG_MAX_PATH];
|
|---|
| 2611 | UINT cchFull = GetFullPathNameA(pszPath, sizeof(szFull), szFull, NULL);
|
|---|
| 2612 | if ( cchFull >= 3
|
|---|
| 2613 | && cchFull < sizeof(szFull))
|
|---|
| 2614 | {
|
|---|
| 2615 | PKFSOBJ pFsObj;
|
|---|
| 2616 | KFSCACHE_LOG2(("kFsCacheLookupSlowA(%s)\n", pszPath));
|
|---|
| 2617 | pFsObj = kFsCacheLookupAbsoluteA(pCache, szFull, cchFull, penmError);
|
|---|
| 2618 |
|
|---|
| 2619 | #if 0 /* No need to do this until it's actually queried. */
|
|---|
| 2620 | /* Cache the resulting path. */
|
|---|
| 2621 | if ( pFsObj
|
|---|
| 2622 | || (pCache->fFlags & KFSCACHE_F_MISSING_PATHS)
|
|---|
| 2623 | || *penmError == KFSLOOKUPERROR_UNSUPPORTED)
|
|---|
| 2624 | {
|
|---|
| 2625 | KU32 uHashPath = kFsCacheStrHash(szFull);
|
|---|
| 2626 | kFsCacheCreatePathHashTabEntryA(pCache, pFsObj, pszPath, cchPath, uHashPath,
|
|---|
| 2627 | uHashPath % K_ELEMENTS(pCache->apAnsiPaths), *penmError);
|
|---|
| 2628 | }
|
|---|
| 2629 | #endif
|
|---|
| 2630 | return pFsObj;
|
|---|
| 2631 | }
|
|---|
| 2632 |
|
|---|
| 2633 | /* The path is too long! */
|
|---|
| 2634 | kHlpAssertMsgFailed(("'%s' -> cchFull=%u\n", pszPath, cchFull));
|
|---|
| 2635 | *penmError = KFSLOOKUPERROR_PATH_TOO_LONG;
|
|---|
| 2636 | return NULL;
|
|---|
| 2637 | }
|
|---|
| 2638 |
|
|---|
| 2639 |
|
|---|
| 2640 | /**
|
|---|
| 2641 | * This deals with paths that are relative and paths that contains '..'
|
|---|
| 2642 | * elements, UTF-16 version.
|
|---|
| 2643 | *
|
|---|
| 2644 | * @returns Pointer to object corresponding to @a pszPath on success.
|
|---|
| 2645 | * NULL if this isn't a path we care to cache.
|
|---|
| 2646 | *
|
|---|
| 2647 | * @param pCache The cache.
|
|---|
| 2648 | * @param pwszPath The path.
|
|---|
| 2649 | * @param cwcPath The length of the path (in wchar_t's).
|
|---|
| 2650 | * @param penmError Where to return details as to why the lookup
|
|---|
| 2651 | * failed.
|
|---|
| 2652 | */
|
|---|
| 2653 | static PKFSOBJ kFsCacheLookupSlowW(PKFSCACHE pCache, const wchar_t *pwszPath, KU32 wcwPath, KFSLOOKUPERROR *penmError)
|
|---|
| 2654 | {
|
|---|
| 2655 | /*
|
|---|
| 2656 | * We just call GetFullPathNameA here to do the job as getcwd and _getdcwd
|
|---|
| 2657 | * ends up calling it anyway.
|
|---|
| 2658 | */
|
|---|
| 2659 | wchar_t wszFull[KFSCACHE_CFG_MAX_PATH];
|
|---|
| 2660 | UINT cwcFull = GetFullPathNameW(pwszPath, KFSCACHE_CFG_MAX_PATH, wszFull, NULL);
|
|---|
| 2661 | if ( cwcFull >= 3
|
|---|
| 2662 | && cwcFull < KFSCACHE_CFG_MAX_PATH)
|
|---|
| 2663 | {
|
|---|
| 2664 | PKFSOBJ pFsObj;
|
|---|
| 2665 | KFSCACHE_LOG2(("kFsCacheLookupSlowA(%ls)\n", pwszPath));
|
|---|
| 2666 | pFsObj = kFsCacheLookupAbsoluteW(pCache, wszFull, cwcFull, penmError);
|
|---|
| 2667 |
|
|---|
| 2668 | #if 0 /* No need to do this until it's actually queried. */
|
|---|
| 2669 | /* Cache the resulting path. */
|
|---|
| 2670 | if ( pFsObj
|
|---|
| 2671 | || (pCache->fFlags & KFSCACHE_F_MISSING_PATHS)
|
|---|
| 2672 | || *penmError == KFSLOOKUPERROR_UNSUPPORTED)
|
|---|
| 2673 | {
|
|---|
| 2674 | KU32 uHashPath = kFsCacheStrHash(szFull);
|
|---|
| 2675 | kFsCacheCreatePathHashTabEntryA(pCache, pFsObj, pszPath, cchPath, uHashPath,
|
|---|
| 2676 | uHashPath % K_ELEMENTS(pCache->apAnsiPaths), *penmError);
|
|---|
| 2677 | }
|
|---|
| 2678 | #endif
|
|---|
| 2679 | return pFsObj;
|
|---|
| 2680 | }
|
|---|
| 2681 |
|
|---|
| 2682 | /* The path is too long! */
|
|---|
| 2683 | kHlpAssertMsgFailed(("'%ls' -> cwcFull=%u\n", pwszPath, cwcFull));
|
|---|
| 2684 | *penmError = KFSLOOKUPERROR_PATH_TOO_LONG;
|
|---|
| 2685 | return NULL;
|
|---|
| 2686 | }
|
|---|
| 2687 |
|
|---|
| 2688 |
|
|---|
| 2689 | /**
|
|---|
| 2690 | * Refreshes a path hash that has expired, ANSI version.
|
|---|
| 2691 | *
|
|---|
| 2692 | * @returns pHash on success, NULL if removed.
|
|---|
| 2693 | * @param pCache The cache.
|
|---|
| 2694 | * @param pHashEntry The path hash.
|
|---|
| 2695 | * @param idxHashTab The hash table entry.
|
|---|
| 2696 | */
|
|---|
| 2697 | static PKFSHASHA kFsCacheRefreshPathA(PKFSCACHE pCache, PKFSHASHA pHashEntry, KU32 idxHashTab)
|
|---|
| 2698 | {
|
|---|
| 2699 | if (!pHashEntry->pFsObj)
|
|---|
| 2700 | {
|
|---|
| 2701 | if (pHashEntry->fAbsolute)
|
|---|
| 2702 | pHashEntry->pFsObj = kFsCacheLookupAbsoluteA(pCache, pHashEntry->pszPath, pHashEntry->cchPath, &pHashEntry->enmError);
|
|---|
| 2703 | else
|
|---|
| 2704 | pHashEntry->pFsObj = kFsCacheLookupSlowA(pCache, pHashEntry->pszPath, pHashEntry->cchPath, &pHashEntry->enmError);
|
|---|
| 2705 | }
|
|---|
| 2706 | else
|
|---|
| 2707 | {
|
|---|
| 2708 | KU8 bOldType = pHashEntry->pFsObj->bObjType;
|
|---|
| 2709 | KFSLOOKUPERROR enmError;
|
|---|
| 2710 | if (kFsCacheRefreshObj(pCache, pHashEntry->pFsObj, &enmError))
|
|---|
| 2711 | {
|
|---|
| 2712 | if (pHashEntry->pFsObj->bObjType == bOldType)
|
|---|
| 2713 | { }
|
|---|
| 2714 | else
|
|---|
| 2715 | {
|
|---|
| 2716 | kFsCacheObjRelease(pCache, pHashEntry->pFsObj);
|
|---|
| 2717 | if (pHashEntry->fAbsolute)
|
|---|
| 2718 | pHashEntry->pFsObj = kFsCacheLookupAbsoluteA(pCache, pHashEntry->pszPath, pHashEntry->cchPath,
|
|---|
| 2719 | &pHashEntry->enmError);
|
|---|
| 2720 | else
|
|---|
| 2721 | pHashEntry->pFsObj = kFsCacheLookupSlowA(pCache, pHashEntry->pszPath, pHashEntry->cchPath,
|
|---|
| 2722 | &pHashEntry->enmError);
|
|---|
| 2723 | }
|
|---|
| 2724 | }
|
|---|
| 2725 | else
|
|---|
| 2726 | {
|
|---|
| 2727 | __debugbreak();
|
|---|
| 2728 | /** @todo just remove this entry. */
|
|---|
| 2729 | return NULL;
|
|---|
| 2730 | }
|
|---|
| 2731 | }
|
|---|
| 2732 | pHashEntry->uCacheGen = pCache->uGenerationMissing;
|
|---|
| 2733 | return pHashEntry;
|
|---|
| 2734 | }
|
|---|
| 2735 |
|
|---|
| 2736 |
|
|---|
| 2737 | /**
|
|---|
| 2738 | * Refreshes a path hash that has expired, UTF-16 version.
|
|---|
| 2739 | *
|
|---|
| 2740 | * @returns pHash on success, NULL if removed.
|
|---|
| 2741 | * @param pCache The cache.
|
|---|
| 2742 | * @param pHashEntry The path hash.
|
|---|
| 2743 | * @param idxHashTab The hash table entry.
|
|---|
| 2744 | */
|
|---|
| 2745 | static PKFSHASHW kFsCacheRefreshPathW(PKFSCACHE pCache, PKFSHASHW pHashEntry, KU32 idxHashTab)
|
|---|
| 2746 | {
|
|---|
| 2747 | if (!pHashEntry->pFsObj)
|
|---|
| 2748 | {
|
|---|
| 2749 | if (pHashEntry->fAbsolute)
|
|---|
| 2750 | pHashEntry->pFsObj = kFsCacheLookupAbsoluteW(pCache, pHashEntry->pwszPath, pHashEntry->cwcPath, &pHashEntry->enmError);
|
|---|
| 2751 | else
|
|---|
| 2752 | pHashEntry->pFsObj = kFsCacheLookupSlowW(pCache, pHashEntry->pwszPath, pHashEntry->cwcPath, &pHashEntry->enmError);
|
|---|
| 2753 | }
|
|---|
| 2754 | else
|
|---|
| 2755 | {
|
|---|
| 2756 | KU8 bOldType = pHashEntry->pFsObj->bObjType;
|
|---|
| 2757 | KFSLOOKUPERROR enmError;
|
|---|
| 2758 | if (kFsCacheRefreshObj(pCache, pHashEntry->pFsObj, &enmError))
|
|---|
| 2759 | {
|
|---|
| 2760 | if (pHashEntry->pFsObj->bObjType == bOldType)
|
|---|
| 2761 | { }
|
|---|
| 2762 | else
|
|---|
| 2763 | {
|
|---|
| 2764 | kFsCacheObjRelease(pCache, pHashEntry->pFsObj);
|
|---|
| 2765 | if (pHashEntry->fAbsolute)
|
|---|
| 2766 | pHashEntry->pFsObj = kFsCacheLookupAbsoluteW(pCache, pHashEntry->pwszPath, pHashEntry->cwcPath,
|
|---|
| 2767 | &pHashEntry->enmError);
|
|---|
| 2768 | else
|
|---|
| 2769 | pHashEntry->pFsObj = kFsCacheLookupSlowW(pCache, pHashEntry->pwszPath, pHashEntry->cwcPath,
|
|---|
| 2770 | &pHashEntry->enmError);
|
|---|
| 2771 | }
|
|---|
| 2772 | }
|
|---|
| 2773 | else
|
|---|
| 2774 | {
|
|---|
| 2775 | __debugbreak();
|
|---|
| 2776 | /** @todo just remove this entry. */
|
|---|
| 2777 | return NULL;
|
|---|
| 2778 | }
|
|---|
| 2779 | }
|
|---|
| 2780 | pHashEntry->uCacheGen = pCache->uGenerationMissing;
|
|---|
| 2781 | return pHashEntry;
|
|---|
| 2782 | }
|
|---|
| 2783 |
|
|---|
| 2784 |
|
|---|
| 2785 | /**
|
|---|
| 2786 | * Internal lookup worker that looks up a KFSOBJ for the given ANSI path with
|
|---|
| 2787 | * length and hash.
|
|---|
| 2788 | *
|
|---|
| 2789 | * This will first try the hash table. If not in the hash table, the file
|
|---|
| 2790 | * system cache tree is walked, missing bits filled in and finally a hash table
|
|---|
| 2791 | * entry is created.
|
|---|
| 2792 | *
|
|---|
| 2793 | * Only drive letter paths are cachable. We don't do any UNC paths at this
|
|---|
| 2794 | * point.
|
|---|
| 2795 | *
|
|---|
| 2796 | * @returns Reference to object corresponding to @a pszPath on success, this
|
|---|
| 2797 | * must be released by kFsCacheObjRelease.
|
|---|
| 2798 | * NULL if not a path we care to cache.
|
|---|
| 2799 | * @param pCache The cache.
|
|---|
| 2800 | * @param pchPath The path to lookup.
|
|---|
| 2801 | * @param cchPath The path length.
|
|---|
| 2802 | * @param uHashPath The hash of the path.
|
|---|
| 2803 | * @param penmError Where to return details as to why the lookup
|
|---|
| 2804 | * failed.
|
|---|
| 2805 | */
|
|---|
| 2806 | static PKFSOBJ kFsCacheLookupHashedA(PKFSCACHE pCache, const char *pchPath, KU32 cchPath, KU32 uHashPath,
|
|---|
| 2807 | KFSLOOKUPERROR *penmError)
|
|---|
| 2808 | {
|
|---|
| 2809 | /*
|
|---|
| 2810 | * Do hash table lookup of the path.
|
|---|
| 2811 | */
|
|---|
| 2812 | KU32 idxHashTab = uHashPath % K_ELEMENTS(pCache->apAnsiPaths);
|
|---|
| 2813 | PKFSHASHA pHashEntry = pCache->apAnsiPaths[idxHashTab];
|
|---|
| 2814 | kHlpAssert(pCache->u32Magic == KFSCACHE_MAGIC);
|
|---|
| 2815 | if (pHashEntry)
|
|---|
| 2816 | {
|
|---|
| 2817 | do
|
|---|
| 2818 | {
|
|---|
| 2819 | if ( pHashEntry->uHashPath == uHashPath
|
|---|
| 2820 | && pHashEntry->cchPath == cchPath
|
|---|
| 2821 | && kHlpMemComp(pHashEntry->pszPath, pchPath, cchPath) == 0)
|
|---|
| 2822 | {
|
|---|
| 2823 | if ( pHashEntry->uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 2824 | || pHashEntry->uCacheGen == (pHashEntry->pFsObj ? pCache->uGeneration : pCache->uGenerationMissing)
|
|---|
| 2825 | || (pHashEntry = kFsCacheRefreshPathA(pCache, pHashEntry, idxHashTab)) )
|
|---|
| 2826 | {
|
|---|
| 2827 | pCache->cLookups++;
|
|---|
| 2828 | pCache->cPathHashHits++;
|
|---|
| 2829 | KFSCACHE_LOG2(("kFsCacheLookupA(%*.*s) - hit %p\n", cchPath, cchPath, pchPath, pHashEntry->pFsObj));
|
|---|
| 2830 | *penmError = pHashEntry->enmError;
|
|---|
| 2831 | if (pHashEntry->pFsObj)
|
|---|
| 2832 | return kFsCacheObjRetainInternal(pHashEntry->pFsObj);
|
|---|
| 2833 | return NULL;
|
|---|
| 2834 | }
|
|---|
| 2835 | break;
|
|---|
| 2836 | }
|
|---|
| 2837 | pHashEntry = pHashEntry->pNext;
|
|---|
| 2838 | } while (pHashEntry);
|
|---|
| 2839 | }
|
|---|
| 2840 |
|
|---|
| 2841 | /*
|
|---|
| 2842 | * Create an entry for it by walking the file system cache and filling in the blanks.
|
|---|
| 2843 | */
|
|---|
| 2844 | if ( cchPath > 0
|
|---|
| 2845 | && cchPath < KFSCACHE_CFG_MAX_PATH)
|
|---|
| 2846 | {
|
|---|
| 2847 | PKFSOBJ pFsObj;
|
|---|
| 2848 | KBOOL fAbsolute;
|
|---|
| 2849 |
|
|---|
| 2850 | /* Is absolute without any '..' bits? */
|
|---|
| 2851 | if ( cchPath >= 3
|
|---|
| 2852 | && ( ( pchPath[1] == ':' /* Drive letter */
|
|---|
| 2853 | && IS_SLASH(pchPath[2])
|
|---|
| 2854 | && IS_ALPHA(pchPath[0]) )
|
|---|
| 2855 | || ( IS_SLASH(pchPath[0]) /* UNC */
|
|---|
| 2856 | && IS_SLASH(pchPath[1]) ) )
|
|---|
| 2857 | && !kFsCacheHasDotDotA(pchPath, cchPath) )
|
|---|
| 2858 | {
|
|---|
| 2859 | pFsObj = kFsCacheLookupAbsoluteA(pCache, pchPath, cchPath, penmError);
|
|---|
| 2860 | fAbsolute = K_TRUE;
|
|---|
| 2861 | }
|
|---|
| 2862 | else
|
|---|
| 2863 | {
|
|---|
| 2864 | pFsObj = kFsCacheLookupSlowA(pCache, pchPath, cchPath, penmError);
|
|---|
| 2865 | fAbsolute = K_FALSE;
|
|---|
| 2866 | }
|
|---|
| 2867 | if ( pFsObj
|
|---|
| 2868 | || ( (pCache->fFlags & KFSCACHE_F_MISSING_PATHS)
|
|---|
| 2869 | && *penmError != KFSLOOKUPERROR_PATH_TOO_LONG)
|
|---|
| 2870 | || *penmError == KFSLOOKUPERROR_UNSUPPORTED )
|
|---|
| 2871 | kFsCacheCreatePathHashTabEntryA(pCache, pFsObj, pchPath, cchPath, uHashPath, idxHashTab, fAbsolute, *penmError);
|
|---|
| 2872 |
|
|---|
| 2873 | pCache->cLookups++;
|
|---|
| 2874 | if (pFsObj)
|
|---|
| 2875 | pCache->cWalkHits++;
|
|---|
| 2876 | return pFsObj;
|
|---|
| 2877 | }
|
|---|
| 2878 |
|
|---|
| 2879 | *penmError = KFSLOOKUPERROR_PATH_TOO_LONG;
|
|---|
| 2880 | return NULL;
|
|---|
| 2881 | }
|
|---|
| 2882 |
|
|---|
| 2883 |
|
|---|
| 2884 | /**
|
|---|
| 2885 | * Internal lookup worker that looks up a KFSOBJ for the given UTF-16 path with
|
|---|
| 2886 | * length and hash.
|
|---|
| 2887 | *
|
|---|
| 2888 | * This will first try the hash table. If not in the hash table, the file
|
|---|
| 2889 | * system cache tree is walked, missing bits filled in and finally a hash table
|
|---|
| 2890 | * entry is created.
|
|---|
| 2891 | *
|
|---|
| 2892 | * Only drive letter paths are cachable. We don't do any UNC paths at this
|
|---|
| 2893 | * point.
|
|---|
| 2894 | *
|
|---|
| 2895 | * @returns Reference to object corresponding to @a pwcPath on success, this
|
|---|
| 2896 | * must be released by kFsCacheObjRelease.
|
|---|
| 2897 | * NULL if not a path we care to cache.
|
|---|
| 2898 | * @param pCache The cache.
|
|---|
| 2899 | * @param pwcPath The path to lookup.
|
|---|
| 2900 | * @param cwcPath The length of the path (in wchar_t's).
|
|---|
| 2901 | * @param uHashPath The hash of the path.
|
|---|
| 2902 | * @param penmError Where to return details as to why the lookup
|
|---|
| 2903 | * failed.
|
|---|
| 2904 | */
|
|---|
| 2905 | static PKFSOBJ kFsCacheLookupHashedW(PKFSCACHE pCache, const wchar_t *pwcPath, KU32 cwcPath, KU32 uHashPath,
|
|---|
| 2906 | KFSLOOKUPERROR *penmError)
|
|---|
| 2907 | {
|
|---|
| 2908 | /*
|
|---|
| 2909 | * Do hash table lookup of the path.
|
|---|
| 2910 | */
|
|---|
| 2911 | KU32 idxHashTab = uHashPath % K_ELEMENTS(pCache->apAnsiPaths);
|
|---|
| 2912 | PKFSHASHW pHashEntry = pCache->apUtf16Paths[idxHashTab];
|
|---|
| 2913 | kHlpAssert(pCache->u32Magic == KFSCACHE_MAGIC);
|
|---|
| 2914 | if (pHashEntry)
|
|---|
| 2915 | {
|
|---|
| 2916 | do
|
|---|
| 2917 | {
|
|---|
| 2918 | if ( pHashEntry->uHashPath == uHashPath
|
|---|
| 2919 | && pHashEntry->cwcPath == cwcPath
|
|---|
| 2920 | && kHlpMemComp(pHashEntry->pwszPath, pwcPath, cwcPath) == 0)
|
|---|
| 2921 | {
|
|---|
| 2922 | if ( pHashEntry->uCacheGen == KFSOBJ_CACHE_GEN_IGNORE
|
|---|
| 2923 | || pHashEntry->uCacheGen == (pHashEntry->pFsObj ? pCache->uGeneration : pCache->uGenerationMissing)
|
|---|
| 2924 | || (pHashEntry = kFsCacheRefreshPathW(pCache, pHashEntry, idxHashTab)) )
|
|---|
| 2925 | {
|
|---|
| 2926 | pCache->cLookups++;
|
|---|
| 2927 | pCache->cPathHashHits++;
|
|---|
| 2928 | KFSCACHE_LOG2(("kFsCacheLookupW(%*.*ls) - hit %p\n", cwcPath, cwcPath, pwcPath, pHashEntry->pFsObj));
|
|---|
| 2929 | *penmError = pHashEntry->enmError;
|
|---|
| 2930 | if (pHashEntry->pFsObj)
|
|---|
| 2931 | return kFsCacheObjRetainInternal(pHashEntry->pFsObj);
|
|---|
| 2932 | return NULL;
|
|---|
| 2933 | }
|
|---|
| 2934 | break;
|
|---|
| 2935 | }
|
|---|
| 2936 | pHashEntry = pHashEntry->pNext;
|
|---|
| 2937 | } while (pHashEntry);
|
|---|
| 2938 | }
|
|---|
| 2939 |
|
|---|
| 2940 | /*
|
|---|
| 2941 | * Create an entry for it by walking the file system cache and filling in the blanks.
|
|---|
| 2942 | */
|
|---|
| 2943 | if ( cwcPath > 0
|
|---|
| 2944 | && cwcPath < KFSCACHE_CFG_MAX_PATH)
|
|---|
| 2945 | {
|
|---|
| 2946 | PKFSOBJ pFsObj;
|
|---|
| 2947 | KBOOL fAbsolute;
|
|---|
| 2948 |
|
|---|
| 2949 | /* Is absolute without any '..' bits? */
|
|---|
| 2950 | if ( cwcPath >= 3
|
|---|
| 2951 | && ( ( pwcPath[1] == ':' /* Drive letter */
|
|---|
| 2952 | && IS_SLASH(pwcPath[2])
|
|---|
| 2953 | && IS_ALPHA(pwcPath[0]) )
|
|---|
| 2954 | || ( IS_SLASH(pwcPath[0]) /* UNC */
|
|---|
| 2955 | && IS_SLASH(pwcPath[1]) ) )
|
|---|
| 2956 | && !kFsCacheHasDotDotW(pwcPath, cwcPath) )
|
|---|
| 2957 | {
|
|---|
| 2958 | pFsObj = kFsCacheLookupAbsoluteW(pCache, pwcPath, cwcPath, penmError);
|
|---|
| 2959 | fAbsolute = K_TRUE;
|
|---|
| 2960 | }
|
|---|
| 2961 | else
|
|---|
| 2962 | {
|
|---|
| 2963 | pFsObj = kFsCacheLookupSlowW(pCache, pwcPath, cwcPath, penmError);
|
|---|
| 2964 | fAbsolute = K_FALSE;
|
|---|
| 2965 | }
|
|---|
| 2966 | if ( pFsObj
|
|---|
| 2967 | || ( (pCache->fFlags & KFSCACHE_F_MISSING_PATHS)
|
|---|
| 2968 | && *penmError != KFSLOOKUPERROR_PATH_TOO_LONG)
|
|---|
| 2969 | || *penmError == KFSLOOKUPERROR_UNSUPPORTED )
|
|---|
| 2970 | kFsCacheCreatePathHashTabEntryW(pCache, pFsObj, pwcPath, cwcPath, uHashPath, idxHashTab, fAbsolute, *penmError);
|
|---|
| 2971 |
|
|---|
| 2972 | pCache->cLookups++;
|
|---|
| 2973 | if (pFsObj)
|
|---|
| 2974 | pCache->cWalkHits++;
|
|---|
| 2975 | return pFsObj;
|
|---|
| 2976 | }
|
|---|
| 2977 |
|
|---|
| 2978 | *penmError = KFSLOOKUPERROR_PATH_TOO_LONG;
|
|---|
| 2979 | return NULL;
|
|---|
| 2980 | }
|
|---|
| 2981 |
|
|---|
| 2982 |
|
|---|
| 2983 |
|
|---|
| 2984 | /**
|
|---|
| 2985 | * Looks up a KFSOBJ for the given ANSI path.
|
|---|
| 2986 | *
|
|---|
| 2987 | * This will first try the hash table. If not in the hash table, the file
|
|---|
| 2988 | * system cache tree is walked, missing bits filled in and finally a hash table
|
|---|
| 2989 | * entry is created.
|
|---|
| 2990 | *
|
|---|
| 2991 | * Only drive letter paths are cachable. We don't do any UNC paths at this
|
|---|
| 2992 | * point.
|
|---|
| 2993 | *
|
|---|
| 2994 | * @returns Reference to object corresponding to @a pszPath on success, this
|
|---|
| 2995 | * must be released by kFsCacheObjRelease.
|
|---|
| 2996 | * NULL if not a path we care to cache.
|
|---|
| 2997 | * @param pCache The cache.
|
|---|
| 2998 | * @param pszPath The path to lookup.
|
|---|
| 2999 | * @param penmError Where to return details as to why the lookup
|
|---|
| 3000 | * failed.
|
|---|
| 3001 | */
|
|---|
| 3002 | PKFSOBJ kFsCacheLookupA(PKFSCACHE pCache, const char *pszPath, KFSLOOKUPERROR *penmError)
|
|---|
| 3003 | {
|
|---|
| 3004 | KU32 uHashPath;
|
|---|
| 3005 | KU32 cchPath = (KU32)kFsCacheStrHashEx(pszPath, &uHashPath);
|
|---|
| 3006 | return kFsCacheLookupHashedA(pCache, pszPath, cchPath, uHashPath, penmError);
|
|---|
| 3007 | }
|
|---|
| 3008 |
|
|---|
| 3009 |
|
|---|
| 3010 | /**
|
|---|
| 3011 | * Looks up a KFSOBJ for the given UTF-16 path.
|
|---|
| 3012 | *
|
|---|
| 3013 | * This will first try the hash table. If not in the hash table, the file
|
|---|
| 3014 | * system cache tree is walked, missing bits filled in and finally a hash table
|
|---|
| 3015 | * entry is created.
|
|---|
| 3016 | *
|
|---|
| 3017 | * Only drive letter paths are cachable. We don't do any UNC paths at this
|
|---|
| 3018 | * point.
|
|---|
| 3019 | *
|
|---|
| 3020 | * @returns Reference to object corresponding to @a pwszPath on success, this
|
|---|
| 3021 | * must be released by kFsCacheObjRelease.
|
|---|
| 3022 | * NULL if not a path we care to cache.
|
|---|
| 3023 | * @param pCache The cache.
|
|---|
| 3024 | * @param pwszPath The path to lookup.
|
|---|
| 3025 | * @param penmError Where to return details as to why the lookup
|
|---|
| 3026 | * failed.
|
|---|
| 3027 | */
|
|---|
| 3028 | PKFSOBJ kFsCacheLookupW(PKFSCACHE pCache, const wchar_t *pwszPath, KFSLOOKUPERROR *penmError)
|
|---|
| 3029 | {
|
|---|
| 3030 | KU32 uHashPath;
|
|---|
| 3031 | KU32 cwcPath = (KU32)kFsCacheUtf16HashEx(pwszPath, &uHashPath);
|
|---|
| 3032 | return kFsCacheLookupHashedW(pCache, pwszPath, cwcPath, uHashPath, penmError);
|
|---|
| 3033 | }
|
|---|
| 3034 |
|
|---|
| 3035 |
|
|---|
| 3036 | /**
|
|---|
| 3037 | * Looks up a KFSOBJ for the given ANSI path.
|
|---|
| 3038 | *
|
|---|
| 3039 | * This will first try the hash table. If not in the hash table, the file
|
|---|
| 3040 | * system cache tree is walked, missing bits filled in and finally a hash table
|
|---|
| 3041 | * entry is created.
|
|---|
| 3042 | *
|
|---|
| 3043 | * Only drive letter paths are cachable. We don't do any UNC paths at this
|
|---|
| 3044 | * point.
|
|---|
| 3045 | *
|
|---|
| 3046 | * @returns Reference to object corresponding to @a pchPath on success, this
|
|---|
| 3047 | * must be released by kFsCacheObjRelease.
|
|---|
| 3048 | * NULL if not a path we care to cache.
|
|---|
| 3049 | * @param pCache The cache.
|
|---|
| 3050 | * @param pchPath The path to lookup (does not need to be nul
|
|---|
| 3051 | * terminated).
|
|---|
| 3052 | * @param cchPath The path length.
|
|---|
| 3053 | * @param penmError Where to return details as to why the lookup
|
|---|
| 3054 | * failed.
|
|---|
| 3055 | */
|
|---|
| 3056 | PKFSOBJ kFsCacheLookupWithLengthA(PKFSCACHE pCache, const char *pchPath, KSIZE cchPath, KFSLOOKUPERROR *penmError)
|
|---|
| 3057 | {
|
|---|
| 3058 | return kFsCacheLookupHashedA(pCache, pchPath, (KU32)cchPath, kFsCacheStrHashN(pchPath, cchPath), penmError);
|
|---|
| 3059 | }
|
|---|
| 3060 |
|
|---|
| 3061 |
|
|---|
| 3062 | /**
|
|---|
| 3063 | * Looks up a KFSOBJ for the given UTF-16 path.
|
|---|
| 3064 | *
|
|---|
| 3065 | * This will first try the hash table. If not in the hash table, the file
|
|---|
| 3066 | * system cache tree is walked, missing bits filled in and finally a hash table
|
|---|
| 3067 | * entry is created.
|
|---|
| 3068 | *
|
|---|
| 3069 | * Only drive letter paths are cachable. We don't do any UNC paths at this
|
|---|
| 3070 | * point.
|
|---|
| 3071 | *
|
|---|
| 3072 | * @returns Reference to object corresponding to @a pwchPath on success, this
|
|---|
| 3073 | * must be released by kFsCacheObjRelease.
|
|---|
| 3074 | * NULL if not a path we care to cache.
|
|---|
| 3075 | * @param pCache The cache.
|
|---|
| 3076 | * @param pwcPath The path to lookup (does not need to be nul
|
|---|
| 3077 | * terminated).
|
|---|
| 3078 | * @param cwcPath The path length (in wchar_t's).
|
|---|
| 3079 | * @param penmError Where to return details as to why the lookup
|
|---|
| 3080 | * failed.
|
|---|
| 3081 | */
|
|---|
| 3082 | PKFSOBJ kFsCacheLookupWithLengthW(PKFSCACHE pCache, const wchar_t *pwcPath, KSIZE cwcPath, KFSLOOKUPERROR *penmError)
|
|---|
| 3083 | {
|
|---|
| 3084 | return kFsCacheLookupHashedW(pCache, pwcPath, (KU32)cwcPath, kFsCacheUtf16HashN(pwcPath, cwcPath), penmError);
|
|---|
| 3085 | }
|
|---|
| 3086 |
|
|---|
| 3087 |
|
|---|
| 3088 | /**
|
|---|
| 3089 | * Wrapper around kFsCacheLookupA that drops KFSOBJ_TYPE_MISSING and returns
|
|---|
| 3090 | * KFSLOOKUPERROR_NOT_FOUND instead.
|
|---|
| 3091 | *
|
|---|
| 3092 | * @returns Reference to object corresponding to @a pszPath on success, this
|
|---|
| 3093 | * must be released by kFsCacheObjRelease.
|
|---|
| 3094 | * NULL if not a path we care to cache.
|
|---|
| 3095 | * @param pCache The cache.
|
|---|
| 3096 | * @param pszPath The path to lookup.
|
|---|
| 3097 | * @param penmError Where to return details as to why the lookup
|
|---|
| 3098 | * failed.
|
|---|
| 3099 | */
|
|---|
| 3100 | PKFSOBJ kFsCacheLookupNoMissingA(PKFSCACHE pCache, const char *pszPath, KFSLOOKUPERROR *penmError)
|
|---|
| 3101 | {
|
|---|
| 3102 | PKFSOBJ pObj = kFsCacheLookupA(pCache, pszPath, penmError);
|
|---|
| 3103 | if (pObj)
|
|---|
| 3104 | {
|
|---|
| 3105 | if (pObj->bObjType != KFSOBJ_TYPE_MISSING)
|
|---|
| 3106 | return pObj;
|
|---|
| 3107 |
|
|---|
| 3108 | kFsCacheObjRelease(pCache, pObj);
|
|---|
| 3109 | *penmError = KFSLOOKUPERROR_NOT_FOUND;
|
|---|
| 3110 | }
|
|---|
| 3111 | return NULL;
|
|---|
| 3112 | }
|
|---|
| 3113 |
|
|---|
| 3114 |
|
|---|
| 3115 | /**
|
|---|
| 3116 | * Wrapper around kFsCacheLookupW that drops KFSOBJ_TYPE_MISSING and returns
|
|---|
| 3117 | * KFSLOOKUPERROR_NOT_FOUND instead.
|
|---|
| 3118 | *
|
|---|
| 3119 | * @returns Reference to object corresponding to @a pszPath on success, this
|
|---|
| 3120 | * must be released by kFsCacheObjRelease.
|
|---|
| 3121 | * NULL if not a path we care to cache.
|
|---|
| 3122 | * @param pCache The cache.
|
|---|
| 3123 | * @param pwszPath The path to lookup.
|
|---|
| 3124 | * @param penmError Where to return details as to why the lookup
|
|---|
| 3125 | * failed.
|
|---|
| 3126 | */
|
|---|
| 3127 | PKFSOBJ kFsCacheLookupNoMissingW(PKFSCACHE pCache, const wchar_t *pwszPath, KFSLOOKUPERROR *penmError)
|
|---|
| 3128 | {
|
|---|
| 3129 | PKFSOBJ pObj = kFsCacheLookupW(pCache, pwszPath, penmError);
|
|---|
| 3130 | if (pObj)
|
|---|
| 3131 | {
|
|---|
| 3132 | if (pObj->bObjType != KFSOBJ_TYPE_MISSING)
|
|---|
| 3133 | return pObj;
|
|---|
| 3134 |
|
|---|
| 3135 | kFsCacheObjRelease(pCache, pObj);
|
|---|
| 3136 | *penmError = KFSLOOKUPERROR_NOT_FOUND;
|
|---|
| 3137 | }
|
|---|
| 3138 | return NULL;
|
|---|
| 3139 | }
|
|---|
| 3140 |
|
|---|
| 3141 |
|
|---|
| 3142 | /**
|
|---|
| 3143 | * Destroys a cache object which has a zero reference count.
|
|---|
| 3144 | *
|
|---|
| 3145 | * @returns 0
|
|---|
| 3146 | * @param pCache The cache.
|
|---|
| 3147 | * @param pObj The object.
|
|---|
| 3148 | */
|
|---|
| 3149 | KU32 kFsCacheObjDestroy(PKFSCACHE pCache, PKFSOBJ pObj)
|
|---|
| 3150 | {
|
|---|
| 3151 | kHlpAssert(pObj->cRefs == 0);
|
|---|
| 3152 | kHlpAssert(pObj->pParent == NULL);
|
|---|
| 3153 | kHlpAssert(pObj->u32Magic == KFSOBJ_MAGIC);
|
|---|
| 3154 |
|
|---|
| 3155 | KFSCACHE_LOG(("Destroying %s/%s, type=%d\n", pObj->pParent ? pObj->pParent->Obj.pszName : "", pObj->pszName, pObj->bObjType));
|
|---|
| 3156 | __debugbreak();
|
|---|
| 3157 |
|
|---|
| 3158 | /*
|
|---|
| 3159 | * Invalidate the structure.
|
|---|
| 3160 | */
|
|---|
| 3161 | pObj->u32Magic = ~KFSOBJ_MAGIC;
|
|---|
| 3162 |
|
|---|
| 3163 | /*
|
|---|
| 3164 | * Destroy any user data first.
|
|---|
| 3165 | */
|
|---|
| 3166 | while (pObj->pUserDataHead != NULL)
|
|---|
| 3167 | {
|
|---|
| 3168 | PKFSUSERDATA pUserData = pObj->pUserDataHead;
|
|---|
| 3169 | pObj->pUserDataHead = pUserData->pNext;
|
|---|
| 3170 | if (pUserData->pfnDestructor)
|
|---|
| 3171 | pUserData->pfnDestructor(pCache, pObj, pUserData);
|
|---|
| 3172 | kHlpFree(pUserData);
|
|---|
| 3173 | }
|
|---|
| 3174 |
|
|---|
| 3175 | /*
|
|---|
| 3176 | * Do type specific destruction
|
|---|
| 3177 | */
|
|---|
| 3178 | switch (pObj->bObjType)
|
|---|
| 3179 | {
|
|---|
| 3180 | case KFSOBJ_TYPE_MISSING:
|
|---|
| 3181 | /* nothing else to do here */
|
|---|
| 3182 | pCache->cbObjects -= sizeof(KFSDIR);
|
|---|
| 3183 | break;
|
|---|
| 3184 |
|
|---|
| 3185 | case KFSOBJ_TYPE_DIR:
|
|---|
| 3186 | {
|
|---|
| 3187 | PKFSDIR pDir = (PKFSDIR)pObj;
|
|---|
| 3188 | KU32 cChildren = pDir->cChildren;
|
|---|
| 3189 | pCache->cbObjects -= sizeof(*pDir)
|
|---|
| 3190 | + K_ALIGN_Z(cChildren, 16) * sizeof(pDir->papChildren)
|
|---|
| 3191 | + pDir->cHashTab * sizeof(pDir->paHashTab);
|
|---|
| 3192 |
|
|---|
| 3193 | pDir->cChildren = 0;
|
|---|
| 3194 | while (cChildren-- > 0)
|
|---|
| 3195 | kFsCacheObjRelease(pCache, pDir->papChildren[cChildren]);
|
|---|
| 3196 | kHlpFree(pDir->papChildren);
|
|---|
| 3197 | pDir->papChildren = NULL;
|
|---|
| 3198 |
|
|---|
| 3199 | kHlpFree(pDir->paHashTab);
|
|---|
| 3200 | pDir->paHashTab = NULL;
|
|---|
| 3201 | break;
|
|---|
| 3202 | }
|
|---|
| 3203 |
|
|---|
| 3204 | case KFSOBJ_TYPE_FILE:
|
|---|
| 3205 | case KFSOBJ_TYPE_OTHER:
|
|---|
| 3206 | pCache->cbObjects -= sizeof(*pObj);
|
|---|
| 3207 | break;
|
|---|
| 3208 |
|
|---|
| 3209 | default:
|
|---|
| 3210 | return 0;
|
|---|
| 3211 | }
|
|---|
| 3212 |
|
|---|
| 3213 | /*
|
|---|
| 3214 | * Common bits.
|
|---|
| 3215 | */
|
|---|
| 3216 | pCache->cbObjects -= pObj->cchName + 1;
|
|---|
| 3217 | #ifdef KFSCACHE_CFG_UTF16
|
|---|
| 3218 | pCache->cbObjects -= (pObj->cwcName + 1) * sizeof(wchar_t);
|
|---|
| 3219 | #endif
|
|---|
| 3220 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 3221 | if (pObj->pszName != pObj->pszShortName)
|
|---|
| 3222 | {
|
|---|
| 3223 | pCache->cbObjects -= pObj->cchShortName + 1;
|
|---|
| 3224 | # ifdef KFSCACHE_CFG_UTF16
|
|---|
| 3225 | pCache->cbObjects -= (pObj->cwcShortName + 1) * sizeof(wchar_t);
|
|---|
| 3226 | # endif
|
|---|
| 3227 | }
|
|---|
| 3228 | #endif
|
|---|
| 3229 | pCache->cObjects--;
|
|---|
| 3230 |
|
|---|
| 3231 | kHlpFree(pObj);
|
|---|
| 3232 | return 0;
|
|---|
| 3233 | }
|
|---|
| 3234 |
|
|---|
| 3235 |
|
|---|
| 3236 | /**
|
|---|
| 3237 | * Releases a reference to a cache object.
|
|---|
| 3238 | *
|
|---|
| 3239 | * @returns New reference count.
|
|---|
| 3240 | * @param pCache The cache.
|
|---|
| 3241 | * @param pObj The object.
|
|---|
| 3242 | */
|
|---|
| 3243 | KU32 kFsCacheObjRelease(PKFSCACHE pCache, PKFSOBJ pObj)
|
|---|
| 3244 | {
|
|---|
| 3245 | if (pObj)
|
|---|
| 3246 | {
|
|---|
| 3247 | KU32 cRefs;
|
|---|
| 3248 | kHlpAssert(pCache->u32Magic == KFSCACHE_MAGIC);
|
|---|
| 3249 | kHlpAssert(pObj->u32Magic == KFSOBJ_MAGIC);
|
|---|
| 3250 |
|
|---|
| 3251 | cRefs = --pObj->cRefs;
|
|---|
| 3252 | if (cRefs)
|
|---|
| 3253 | return cRefs;
|
|---|
| 3254 | return kFsCacheObjDestroy(pCache, pObj);
|
|---|
| 3255 | }
|
|---|
| 3256 | return 0;
|
|---|
| 3257 | }
|
|---|
| 3258 |
|
|---|
| 3259 |
|
|---|
| 3260 | /**
|
|---|
| 3261 | * Retains a reference to a cahce object.
|
|---|
| 3262 | *
|
|---|
| 3263 | * @returns New reference count.
|
|---|
| 3264 | * @param pObj The object.
|
|---|
| 3265 | */
|
|---|
| 3266 | KU32 kFsCacheObjRetain(PKFSOBJ pObj)
|
|---|
| 3267 | {
|
|---|
| 3268 | KU32 cRefs;
|
|---|
| 3269 | kHlpAssert(pCache->u32Magic == KFSCACHE_MAGIC);
|
|---|
| 3270 | kHlpAssert(pObj->u32Magic == KFSOBJ_MAGIC);
|
|---|
| 3271 |
|
|---|
| 3272 | cRefs = ++pObj->cRefs;
|
|---|
| 3273 | kHlpAssert(cRefs < 16384);
|
|---|
| 3274 | return cRefs;
|
|---|
| 3275 | }
|
|---|
| 3276 |
|
|---|
| 3277 |
|
|---|
| 3278 | /**
|
|---|
| 3279 | * Associates an item of user data with the given object.
|
|---|
| 3280 | *
|
|---|
| 3281 | * If the data needs cleaning up before being free, set the
|
|---|
| 3282 | * PKFSUSERDATA::pfnDestructor member of the returned structure.
|
|---|
| 3283 | *
|
|---|
| 3284 | * @returns Pointer to the user data on success.
|
|---|
| 3285 | * NULL if out of memory or key already in use.
|
|---|
| 3286 | *
|
|---|
| 3287 | * @param pCache The cache.
|
|---|
| 3288 | * @param pObj The object.
|
|---|
| 3289 | * @param uKey The user data key.
|
|---|
| 3290 | * @param cbUserData The size of the user data.
|
|---|
| 3291 | */
|
|---|
| 3292 | PKFSUSERDATA kFsCacheObjAddUserData(PKFSCACHE pCache, PKFSOBJ pObj, KUPTR uKey, KSIZE cbUserData)
|
|---|
| 3293 | {
|
|---|
| 3294 | kHlpAssert(cbUserData >= sizeof(*pNew));
|
|---|
| 3295 | if (kFsCacheObjGetUserData(pCache, pObj, uKey) == NULL)
|
|---|
| 3296 | {
|
|---|
| 3297 | PKFSUSERDATA pNew = (PKFSUSERDATA)kHlpAllocZ(cbUserData);
|
|---|
| 3298 | if (pNew)
|
|---|
| 3299 | {
|
|---|
| 3300 | pNew->uKey = uKey;
|
|---|
| 3301 | pNew->pfnDestructor = NULL;
|
|---|
| 3302 | pNew->pNext = pObj->pUserDataHead;
|
|---|
| 3303 | pObj->pUserDataHead = pNew;
|
|---|
| 3304 | return pNew;
|
|---|
| 3305 | }
|
|---|
| 3306 | }
|
|---|
| 3307 |
|
|---|
| 3308 | return NULL;
|
|---|
| 3309 | }
|
|---|
| 3310 |
|
|---|
| 3311 |
|
|---|
| 3312 | /**
|
|---|
| 3313 | * Retrieves an item of user data associated with the given object.
|
|---|
| 3314 | *
|
|---|
| 3315 | * @returns Pointer to the associated user data if found, otherwise NULL.
|
|---|
| 3316 | * @param pCache The cache.
|
|---|
| 3317 | * @param pObj The object.
|
|---|
| 3318 | * @param uKey The user data key.
|
|---|
| 3319 | */
|
|---|
| 3320 | PKFSUSERDATA kFsCacheObjGetUserData(PKFSCACHE pCache, PKFSOBJ pObj, KUPTR uKey)
|
|---|
| 3321 | {
|
|---|
| 3322 | PKFSUSERDATA pCur;
|
|---|
| 3323 |
|
|---|
| 3324 | kHlpAssert(pCache->u32Magic == KFSCACHE_MAGIC);
|
|---|
| 3325 | kHlpAssert(pObj->u32Magic == KFSOBJ_MAGIC);
|
|---|
| 3326 |
|
|---|
| 3327 | for (pCur = pObj->pUserDataHead; pCur; pCur = pCur->pNext)
|
|---|
| 3328 | if (pCur->uKey == uKey)
|
|---|
| 3329 | return pCur;
|
|---|
| 3330 | return NULL;
|
|---|
| 3331 | }
|
|---|
| 3332 |
|
|---|
| 3333 |
|
|---|
| 3334 | /**
|
|---|
| 3335 | * Gets the full path to @a pObj, ANSI version.
|
|---|
| 3336 | *
|
|---|
| 3337 | * @returns K_TRUE on success, K_FALSE on buffer overflow (nothing stored).
|
|---|
| 3338 | * @param pObj The object to get the full path to.
|
|---|
| 3339 | * @param pszPath Where to return the path
|
|---|
| 3340 | * @param cbPath The size of the output buffer.
|
|---|
| 3341 | * @param chSlash The slash to use.
|
|---|
| 3342 | */
|
|---|
| 3343 | KBOOL kFsCacheObjGetFullPathA(PKFSOBJ pObj, char *pszPath, KSIZE cbPath, char chSlash)
|
|---|
| 3344 | {
|
|---|
| 3345 | KSIZE off = pObj->cchParent;
|
|---|
| 3346 | kHlpAssert(pObj->u32Magic == KFSOBJ_MAGIC);
|
|---|
| 3347 | if (off > 0)
|
|---|
| 3348 | {
|
|---|
| 3349 | KSIZE offEnd = off + pObj->cchName;
|
|---|
| 3350 | if (offEnd < cbPath)
|
|---|
| 3351 | {
|
|---|
| 3352 | PKFSDIR pAncestor;
|
|---|
| 3353 |
|
|---|
| 3354 | pszPath[off + pObj->cchName] = '\0';
|
|---|
| 3355 | memcpy(&pszPath[off], pObj->pszName, pObj->cchName);
|
|---|
| 3356 |
|
|---|
| 3357 | for (pAncestor = pObj->pParent; off > 0; pAncestor = pAncestor->Obj.pParent)
|
|---|
| 3358 | {
|
|---|
| 3359 | kHlpAssert(off > 1);
|
|---|
| 3360 | kHlpAssert(pAncestor != NULL);
|
|---|
| 3361 | kHlpAssert(pAncestor->Obj.cchName > 0);
|
|---|
| 3362 | pszPath[--off] = chSlash;
|
|---|
| 3363 | off -= pAncestor->Obj.cchName;
|
|---|
| 3364 | kHlpAssert(pAncestor->Obj.cchParent == off);
|
|---|
| 3365 | memcpy(&pszPath[off], pAncestor->Obj.pszName, pAncestor->Obj.cchName);
|
|---|
| 3366 | }
|
|---|
| 3367 | return K_TRUE;
|
|---|
| 3368 | }
|
|---|
| 3369 | }
|
|---|
| 3370 | else
|
|---|
| 3371 | {
|
|---|
| 3372 | KBOOL const fDriveLetter = pObj->cchName == 2 && pObj->pszName[2] == ':';
|
|---|
| 3373 | off = pObj->cchName;
|
|---|
| 3374 | if (off + fDriveLetter < cbPath)
|
|---|
| 3375 | {
|
|---|
| 3376 | memcpy(pszPath, pObj->pszName, off);
|
|---|
| 3377 | if (fDriveLetter)
|
|---|
| 3378 | pszPath[off++] = chSlash;
|
|---|
| 3379 | pszPath[off] = '\0';
|
|---|
| 3380 | return K_TRUE;
|
|---|
| 3381 | }
|
|---|
| 3382 | }
|
|---|
| 3383 |
|
|---|
| 3384 | return K_FALSE;
|
|---|
| 3385 | }
|
|---|
| 3386 |
|
|---|
| 3387 |
|
|---|
| 3388 | /**
|
|---|
| 3389 | * Gets the full path to @a pObj, UTF-16 version.
|
|---|
| 3390 | *
|
|---|
| 3391 | * @returns K_TRUE on success, K_FALSE on buffer overflow (nothing stored).
|
|---|
| 3392 | * @param pObj The object to get the full path to.
|
|---|
| 3393 | * @param pszPath Where to return the path
|
|---|
| 3394 | * @param cbPath The size of the output buffer.
|
|---|
| 3395 | * @param wcSlash The slash to use.
|
|---|
| 3396 | */
|
|---|
| 3397 | KBOOL kFsCacheObjGetFullPathW(PKFSOBJ pObj, wchar_t *pwszPath, KSIZE cwcPath, wchar_t wcSlash)
|
|---|
| 3398 | {
|
|---|
| 3399 | KSIZE off = pObj->cwcParent;
|
|---|
| 3400 | kHlpAssert(pObj->u32Magic == KFSOBJ_MAGIC);
|
|---|
| 3401 | if (off > 0)
|
|---|
| 3402 | {
|
|---|
| 3403 | KSIZE offEnd = off + pObj->cwcName;
|
|---|
| 3404 | if (offEnd < cwcPath)
|
|---|
| 3405 | {
|
|---|
| 3406 | PKFSDIR pAncestor;
|
|---|
| 3407 |
|
|---|
| 3408 | pwszPath[off + pObj->cwcName] = '\0';
|
|---|
| 3409 | memcpy(&pwszPath[off], pObj->pwszName, pObj->cwcName * sizeof(wchar_t));
|
|---|
| 3410 |
|
|---|
| 3411 | for (pAncestor = pObj->pParent; off > 0; pAncestor = pAncestor->Obj.pParent)
|
|---|
| 3412 | {
|
|---|
| 3413 | kHlpAssert(off > 1);
|
|---|
| 3414 | kHlpAssert(pAncestor != NULL);
|
|---|
| 3415 | kHlpAssert(pAncestor->Obj.cwcName > 0);
|
|---|
| 3416 | pwszPath[--off] = wcSlash;
|
|---|
| 3417 | off -= pAncestor->Obj.cwcName;
|
|---|
| 3418 | kHlpAssert(pAncestor->Obj.cwcParent == off);
|
|---|
| 3419 | memcpy(&pwszPath[off], pAncestor->Obj.pwszName, pAncestor->Obj.cwcName * sizeof(wchar_t));
|
|---|
| 3420 | }
|
|---|
| 3421 | return K_TRUE;
|
|---|
| 3422 | }
|
|---|
| 3423 | }
|
|---|
| 3424 | else
|
|---|
| 3425 | {
|
|---|
| 3426 | KBOOL const fDriveLetter = pObj->cchName == 2 && pObj->pszName[2] == ':';
|
|---|
| 3427 | off = pObj->cwcName;
|
|---|
| 3428 | if (off + fDriveLetter < cwcPath)
|
|---|
| 3429 | {
|
|---|
| 3430 | memcpy(pwszPath, pObj->pwszName, off * sizeof(wchar_t));
|
|---|
| 3431 | if (fDriveLetter)
|
|---|
| 3432 | pwszPath[off++] = wcSlash;
|
|---|
| 3433 | pwszPath[off] = '\0';
|
|---|
| 3434 | return K_TRUE;
|
|---|
| 3435 | }
|
|---|
| 3436 | }
|
|---|
| 3437 |
|
|---|
| 3438 | return K_FALSE;
|
|---|
| 3439 | }
|
|---|
| 3440 |
|
|---|
| 3441 |
|
|---|
| 3442 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 3443 |
|
|---|
| 3444 | /**
|
|---|
| 3445 | * Gets the full short path to @a pObj, ANSI version.
|
|---|
| 3446 | *
|
|---|
| 3447 | * @returns K_TRUE on success, K_FALSE on buffer overflow (nothing stored).
|
|---|
| 3448 | * @param pObj The object to get the full path to.
|
|---|
| 3449 | * @param pszPath Where to return the path
|
|---|
| 3450 | * @param cbPath The size of the output buffer.
|
|---|
| 3451 | * @param chSlash The slash to use.
|
|---|
| 3452 | */
|
|---|
| 3453 | KBOOL kFsCacheObjGetFullShortPathA(PKFSOBJ pObj, char *pszPath, KSIZE cbPath, char chSlash)
|
|---|
| 3454 | {
|
|---|
| 3455 | KSIZE off = pObj->cchShortParent;
|
|---|
| 3456 | kHlpAssert(pObj->u32Magic == KFSOBJ_MAGIC);
|
|---|
| 3457 | if (off > 0)
|
|---|
| 3458 | {
|
|---|
| 3459 | KSIZE offEnd = off + pObj->cchShortName;
|
|---|
| 3460 | if (offEnd < cbPath)
|
|---|
| 3461 | {
|
|---|
| 3462 | PKFSDIR pAncestor;
|
|---|
| 3463 |
|
|---|
| 3464 | pszPath[off + pObj->cchShortName] = '\0';
|
|---|
| 3465 | memcpy(&pszPath[off], pObj->pszShortName, pObj->cchShortName);
|
|---|
| 3466 |
|
|---|
| 3467 | for (pAncestor = pObj->pParent; off > 0; pAncestor = pAncestor->Obj.pParent)
|
|---|
| 3468 | {
|
|---|
| 3469 | kHlpAssert(off > 1);
|
|---|
| 3470 | kHlpAssert(pAncestor != NULL);
|
|---|
| 3471 | kHlpAssert(pAncestor->Obj.cchShortName > 0);
|
|---|
| 3472 | pszPath[--off] = chSlash;
|
|---|
| 3473 | off -= pAncestor->Obj.cchShortName;
|
|---|
| 3474 | kHlpAssert(pAncestor->Obj.cchShortParent == off);
|
|---|
| 3475 | memcpy(&pszPath[off], pAncestor->Obj.pszShortName, pAncestor->Obj.cchShortName);
|
|---|
| 3476 | }
|
|---|
| 3477 | return K_TRUE;
|
|---|
| 3478 | }
|
|---|
| 3479 | }
|
|---|
| 3480 | else
|
|---|
| 3481 | {
|
|---|
| 3482 | KBOOL const fDriveLetter = pObj->cchShortName == 2 && pObj->pszShortName[2] == ':';
|
|---|
| 3483 | off = pObj->cchShortName;
|
|---|
| 3484 | if (off + fDriveLetter < cbPath)
|
|---|
| 3485 | {
|
|---|
| 3486 | memcpy(pszPath, pObj->pszShortName, off);
|
|---|
| 3487 | if (fDriveLetter)
|
|---|
| 3488 | pszPath[off++] = chSlash;
|
|---|
| 3489 | pszPath[off] = '\0';
|
|---|
| 3490 | return K_TRUE;
|
|---|
| 3491 | }
|
|---|
| 3492 | }
|
|---|
| 3493 |
|
|---|
| 3494 | return K_FALSE;
|
|---|
| 3495 | }
|
|---|
| 3496 |
|
|---|
| 3497 |
|
|---|
| 3498 | /**
|
|---|
| 3499 | * Gets the full short path to @a pObj, UTF-16 version.
|
|---|
| 3500 | *
|
|---|
| 3501 | * @returns K_TRUE on success, K_FALSE on buffer overflow (nothing stored).
|
|---|
| 3502 | * @param pObj The object to get the full path to.
|
|---|
| 3503 | * @param pszPath Where to return the path
|
|---|
| 3504 | * @param cbPath The size of the output buffer.
|
|---|
| 3505 | * @param wcSlash The slash to use.
|
|---|
| 3506 | */
|
|---|
| 3507 | KBOOL kFsCacheObjGetFullShortPathW(PKFSOBJ pObj, wchar_t *pwszPath, KSIZE cwcPath, wchar_t wcSlash)
|
|---|
| 3508 | {
|
|---|
| 3509 | KSIZE off = pObj->cwcShortParent;
|
|---|
| 3510 | kHlpAssert(pObj->u32Magic == KFSOBJ_MAGIC);
|
|---|
| 3511 | if (off > 0)
|
|---|
| 3512 | {
|
|---|
| 3513 | KSIZE offEnd = off + pObj->cwcShortName;
|
|---|
| 3514 | if (offEnd < cwcPath)
|
|---|
| 3515 | {
|
|---|
| 3516 | PKFSDIR pAncestor;
|
|---|
| 3517 |
|
|---|
| 3518 | pwszPath[off + pObj->cwcShortName] = '\0';
|
|---|
| 3519 | memcpy(&pwszPath[off], pObj->pwszShortName, pObj->cwcShortName * sizeof(wchar_t));
|
|---|
| 3520 |
|
|---|
| 3521 | for (pAncestor = pObj->pParent; off > 0; pAncestor = pAncestor->Obj.pParent)
|
|---|
| 3522 | {
|
|---|
| 3523 | kHlpAssert(off > 1);
|
|---|
| 3524 | kHlpAssert(pAncestor != NULL);
|
|---|
| 3525 | kHlpAssert(pAncestor->Obj.cwcShortName > 0);
|
|---|
| 3526 | pwszPath[--off] = wcSlash;
|
|---|
| 3527 | off -= pAncestor->Obj.cwcShortName;
|
|---|
| 3528 | kHlpAssert(pAncestor->Obj.cwcShortParent == off);
|
|---|
| 3529 | memcpy(&pwszPath[off], pAncestor->Obj.pwszShortName, pAncestor->Obj.cwcShortName * sizeof(wchar_t));
|
|---|
| 3530 | }
|
|---|
| 3531 | return K_TRUE;
|
|---|
| 3532 | }
|
|---|
| 3533 | }
|
|---|
| 3534 | else
|
|---|
| 3535 | {
|
|---|
| 3536 | KBOOL const fDriveLetter = pObj->cchShortName == 2 && pObj->pszShortName[2] == ':';
|
|---|
| 3537 | off = pObj->cwcShortName;
|
|---|
| 3538 | if (off + fDriveLetter < cwcPath)
|
|---|
| 3539 | {
|
|---|
| 3540 | memcpy(pwszPath, pObj->pwszShortName, off * sizeof(wchar_t));
|
|---|
| 3541 | if (fDriveLetter)
|
|---|
| 3542 | pwszPath[off++] = wcSlash;
|
|---|
| 3543 | pwszPath[off] = '\0';
|
|---|
| 3544 | return K_TRUE;
|
|---|
| 3545 | }
|
|---|
| 3546 | }
|
|---|
| 3547 |
|
|---|
| 3548 | return K_FALSE;
|
|---|
| 3549 | }
|
|---|
| 3550 |
|
|---|
| 3551 | #endif /* KFSCACHE_CFG_SHORT_NAMES */
|
|---|
| 3552 |
|
|---|
| 3553 |
|
|---|
| 3554 |
|
|---|
| 3555 | /**
|
|---|
| 3556 | * Read the specified bits from the files into the given buffer, simple version.
|
|---|
| 3557 | *
|
|---|
| 3558 | * @returns K_TRUE on success (all requested bytes read),
|
|---|
| 3559 | * K_FALSE on any kind of failure.
|
|---|
| 3560 | *
|
|---|
| 3561 | * @param pCache The cache.
|
|---|
| 3562 | * @param pFileObj The file object.
|
|---|
| 3563 | * @param offStart Where to start reading.
|
|---|
| 3564 | * @param pvBuf Where to store what we read.
|
|---|
| 3565 | * @param cbToRead How much to read (exact).
|
|---|
| 3566 | */
|
|---|
| 3567 | KBOOL kFsCacheFileSimpleOpenReadClose(PKFSCACHE pCache, PKFSOBJ pFileObj, KU64 offStart, void *pvBuf, KSIZE cbToRead)
|
|---|
| 3568 | {
|
|---|
| 3569 | /*
|
|---|
| 3570 | * Open the file relative to the parent directory.
|
|---|
| 3571 | */
|
|---|
| 3572 | MY_NTSTATUS rcNt;
|
|---|
| 3573 | HANDLE hFile;
|
|---|
| 3574 | MY_IO_STATUS_BLOCK Ios;
|
|---|
| 3575 | MY_OBJECT_ATTRIBUTES ObjAttr;
|
|---|
| 3576 | MY_UNICODE_STRING UniStr;
|
|---|
| 3577 |
|
|---|
| 3578 | kHlpAssertReturn(pFileObj->bObjType == KFSOBJ_TYPE_FILE, K_FALSE);
|
|---|
| 3579 | kHlpAssert(pFileObj->pParent);
|
|---|
| 3580 | kHlpAssertReturn(pFileObj->pParent->hDir != INVALID_HANDLE_VALUE, K_FALSE);
|
|---|
| 3581 | kHlpAssertReturn(offStart == 0, K_FALSE); /** @todo when needed */
|
|---|
| 3582 |
|
|---|
| 3583 | Ios.Information = -1;
|
|---|
| 3584 | Ios.u.Status = -1;
|
|---|
| 3585 |
|
|---|
| 3586 | UniStr.Buffer = (wchar_t *)pFileObj->pwszName;
|
|---|
| 3587 | UniStr.Length = (USHORT)(pFileObj->cwcName * sizeof(wchar_t));
|
|---|
| 3588 | UniStr.MaximumLength = UniStr.Length + sizeof(wchar_t);
|
|---|
| 3589 |
|
|---|
| 3590 | MyInitializeObjectAttributes(&ObjAttr, &UniStr, OBJ_CASE_INSENSITIVE, pFileObj->pParent->hDir, NULL /*pSecAttr*/);
|
|---|
| 3591 |
|
|---|
| 3592 | rcNt = g_pfnNtCreateFile(&hFile,
|
|---|
| 3593 | GENERIC_READ | SYNCHRONIZE,
|
|---|
| 3594 | &ObjAttr,
|
|---|
| 3595 | &Ios,
|
|---|
| 3596 | NULL, /*cbFileInitialAlloc */
|
|---|
| 3597 | FILE_ATTRIBUTE_NORMAL,
|
|---|
| 3598 | FILE_SHARE_READ,
|
|---|
| 3599 | FILE_OPEN,
|
|---|
| 3600 | FILE_NON_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT,
|
|---|
| 3601 | NULL, /*pEaBuffer*/
|
|---|
| 3602 | 0); /*cbEaBuffer*/
|
|---|
| 3603 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 3604 | {
|
|---|
| 3605 | LARGE_INTEGER offFile;
|
|---|
| 3606 | offFile.QuadPart = offStart;
|
|---|
| 3607 |
|
|---|
| 3608 | Ios.Information = -1;
|
|---|
| 3609 | Ios.u.Status = -1;
|
|---|
| 3610 | rcNt = g_pfnNtReadFile(hFile, NULL /*hEvent*/, NULL /*pfnApcComplete*/, NULL /*pvApcCtx*/, &Ios,
|
|---|
| 3611 | pvBuf, (KU32)cbToRead, !offStart ? &offFile : NULL, NULL /*puKey*/);
|
|---|
| 3612 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 3613 | rcNt = Ios.u.Status;
|
|---|
| 3614 | if (MY_NT_SUCCESS(rcNt))
|
|---|
| 3615 | {
|
|---|
| 3616 | if (Ios.Information == cbToRead)
|
|---|
| 3617 | {
|
|---|
| 3618 | g_pfnNtClose(hFile);
|
|---|
| 3619 | return K_TRUE;
|
|---|
| 3620 | }
|
|---|
| 3621 | KFSCACHE_LOG(("Error reading %#x bytes from '%ls': Information=%p\n", pFileObj->pwszName, Ios.Information));
|
|---|
| 3622 | }
|
|---|
| 3623 | else
|
|---|
| 3624 | KFSCACHE_LOG(("Error reading %#x bytes from '%ls': %#x\n", pFileObj->pwszName, rcNt));
|
|---|
| 3625 | g_pfnNtClose(hFile);
|
|---|
| 3626 | }
|
|---|
| 3627 | else
|
|---|
| 3628 | KFSCACHE_LOG(("Error opening '%ls' for caching: %#x\n", pFileObj->pwszName, rcNt));
|
|---|
| 3629 | return K_FALSE;
|
|---|
| 3630 | }
|
|---|
| 3631 |
|
|---|
| 3632 |
|
|---|
| 3633 | /**
|
|---|
| 3634 | * Invalidate all cache entries of missing files.
|
|---|
| 3635 | *
|
|---|
| 3636 | * @param pCache The cache.
|
|---|
| 3637 | */
|
|---|
| 3638 | void kFsCacheInvalidateMissing(PKFSCACHE pCache)
|
|---|
| 3639 | {
|
|---|
| 3640 | kHlpAssert(pCache->u32Magic == KFSOBJ_MAGIC);
|
|---|
| 3641 | pCache->uGenerationMissing++;
|
|---|
| 3642 | kHlpAssert(pCache->uGenerationMissing < KU32_MAX);
|
|---|
| 3643 | KFSCACHE_LOG(("Invalidate missing %#x\n", pCache->uGenerationMissing));
|
|---|
| 3644 | }
|
|---|
| 3645 |
|
|---|
| 3646 |
|
|---|
| 3647 | /**
|
|---|
| 3648 | * Invalidate all cache entries of missing files.
|
|---|
| 3649 | *
|
|---|
| 3650 | * @param pCache The cache.
|
|---|
| 3651 | */
|
|---|
| 3652 | void kFsCacheInvalidateAll(PKFSCACHE pCache)
|
|---|
| 3653 | {
|
|---|
| 3654 | kHlpAssert(pCache->u32Magic == KFSOBJ_MAGIC);
|
|---|
| 3655 | pCache->uGenerationMissing++;
|
|---|
| 3656 | kHlpAssert(pCache->uGenerationMissing < KU32_MAX);
|
|---|
| 3657 | pCache->uGeneration++;
|
|---|
| 3658 | kHlpAssert(pCache->uGeneration < KU32_MAX);
|
|---|
| 3659 | KFSCACHE_LOG(("Invalidate all %#x/%#x\n", pCache->uGenerationMissing, pCache->uGeneration));
|
|---|
| 3660 |
|
|---|
| 3661 | }
|
|---|
| 3662 |
|
|---|
| 3663 |
|
|---|
| 3664 |
|
|---|
| 3665 | PKFSCACHE kFsCacheCreate(KU32 fFlags)
|
|---|
| 3666 | {
|
|---|
| 3667 | PKFSCACHE pCache;
|
|---|
| 3668 | birdResolveImports();
|
|---|
| 3669 |
|
|---|
| 3670 | pCache = (PKFSCACHE)kHlpAllocZ(sizeof(*pCache));
|
|---|
| 3671 | if (pCache)
|
|---|
| 3672 | {
|
|---|
| 3673 | /* Dummy root dir entry. */
|
|---|
| 3674 | pCache->RootDir.Obj.u32Magic = KFSOBJ_MAGIC;
|
|---|
| 3675 | pCache->RootDir.Obj.cRefs = 1;
|
|---|
| 3676 | pCache->RootDir.Obj.uCacheGen = KFSOBJ_CACHE_GEN_IGNORE;
|
|---|
| 3677 | pCache->RootDir.Obj.bObjType = KFSOBJ_TYPE_DIR;
|
|---|
| 3678 | pCache->RootDir.Obj.fHaveStats = K_FALSE;
|
|---|
| 3679 | pCache->RootDir.Obj.pParent = NULL;
|
|---|
| 3680 | pCache->RootDir.Obj.pszName = "";
|
|---|
| 3681 | pCache->RootDir.Obj.cchName = 0;
|
|---|
| 3682 | pCache->RootDir.Obj.cchParent = 0;
|
|---|
| 3683 | #ifdef KFSCACHE_CFG_UTF16
|
|---|
| 3684 | pCache->RootDir.Obj.cwcName = 0;
|
|---|
| 3685 | pCache->RootDir.Obj.cwcParent = 0;
|
|---|
| 3686 | pCache->RootDir.Obj.pwszName = L"";
|
|---|
| 3687 | #endif
|
|---|
| 3688 |
|
|---|
| 3689 | #ifdef KFSCACHE_CFG_SHORT_NAMES
|
|---|
| 3690 | pCache->RootDir.Obj.pszShortName = NULL;
|
|---|
| 3691 | pCache->RootDir.Obj.cchShortName = 0;
|
|---|
| 3692 | pCache->RootDir.Obj.cchShortParent = 0;
|
|---|
| 3693 | # ifdef KFSCACHE_CFG_UTF16
|
|---|
| 3694 | pCache->RootDir.Obj.cwcShortName;
|
|---|
| 3695 | pCache->RootDir.Obj.cwcShortParent;
|
|---|
| 3696 | pCache->RootDir.Obj.pwszShortName;
|
|---|
| 3697 | # endif
|
|---|
| 3698 | #endif
|
|---|
| 3699 | pCache->RootDir.cChildren = 0;
|
|---|
| 3700 | pCache->RootDir.cChildrenAllocated = 0;
|
|---|
| 3701 | pCache->RootDir.papChildren = NULL;
|
|---|
| 3702 | pCache->RootDir.hDir = INVALID_HANDLE_VALUE;
|
|---|
| 3703 | pCache->RootDir.cHashTab = 251;
|
|---|
| 3704 | pCache->RootDir.paHashTab = (PKFSOBJHASH)kHlpAllocZ( pCache->RootDir.cHashTab
|
|---|
| 3705 | * sizeof(pCache->RootDir.paHashTab[0]));
|
|---|
| 3706 | if (pCache->RootDir.paHashTab)
|
|---|
| 3707 | {
|
|---|
| 3708 | /* The cache itself. */
|
|---|
| 3709 | pCache->u32Magic = KFSCACHE_MAGIC;
|
|---|
| 3710 | pCache->fFlags = fFlags;
|
|---|
| 3711 | pCache->uGeneration = KU32_MAX / 2;
|
|---|
| 3712 | pCache->uGenerationMissing = 1;
|
|---|
| 3713 | pCache->cObjects = 1;
|
|---|
| 3714 | pCache->cbObjects = sizeof(pCache->RootDir) + pCache->RootDir.cHashTab * sizeof(pCache->RootDir.paHashTab[0]);
|
|---|
| 3715 | pCache->cPathHashHits = 0;
|
|---|
| 3716 | pCache->cWalkHits = 0;
|
|---|
| 3717 | pCache->cAnsiPaths = 0;
|
|---|
| 3718 | pCache->cAnsiPathCollisions = 0;
|
|---|
| 3719 | pCache->cbAnsiPaths = 0;
|
|---|
| 3720 | #ifdef KFSCACHE_CFG_UTF16
|
|---|
| 3721 | pCache->cUtf16Paths = 0;
|
|---|
| 3722 | pCache->cUtf16PathCollisions = 0;
|
|---|
| 3723 | pCache->cbUtf16Paths = 0;
|
|---|
| 3724 | #endif
|
|---|
| 3725 | return pCache;
|
|---|
| 3726 | }
|
|---|
| 3727 |
|
|---|
| 3728 | kHlpFree(pCache);
|
|---|
| 3729 | }
|
|---|
| 3730 | return NULL;
|
|---|
| 3731 | }
|
|---|
| 3732 |
|
|---|