bitops.h revision f9bcce3be04b554004a82d4fe10edaf6077241be
1/* 2 * bitops.h --- Bitmap frobbing code. The byte swapping routines are 3 * also included here. 4 * 5 * Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o. 6 * 7 * %Begin-Header% 8 * This file may be redistributed under the terms of the GNU Public 9 * License. 10 * %End-Header% 11 * 12 * i386 bitops operations taken from <asm/bitops.h>, Copyright 1992, 13 * Linus Torvalds. 14 */ 15 16 17extern int ext2fs_set_bit(unsigned int nr,void * addr); 18extern int ext2fs_clear_bit(unsigned int nr, void * addr); 19extern int ext2fs_test_bit(unsigned int nr, const void * addr); 20extern void ext2fs_fast_set_bit(unsigned int nr,void * addr); 21extern void ext2fs_fast_clear_bit(unsigned int nr, void * addr); 22extern __u16 ext2fs_swab16(__u16 val); 23extern __u32 ext2fs_swab32(__u32 val); 24 25#ifdef WORDS_BIGENDIAN 26#define ext2fs_cpu_to_le32(x) ext2fs_swab32((x)) 27#define ext2fs_le32_to_cpu(x) ext2fs_swab32((x)) 28#define ext2fs_cpu_to_le16(x) ext2fs_swab16((x)) 29#define ext2fs_le16_to_cpu(x) ext2fs_swab16((x)) 30#define ext2fs_cpu_to_be32(x) ((__u32)(x)) 31#define ext2fs_be32_to_cpu(x) ((__u32)(x)) 32#define ext2fs_cpu_to_be16(x) ((__u16)(x)) 33#define ext2fs_be16_to_cpu(x) ((__u16)(x)) 34#else 35#define ext2fs_cpu_to_le32(x) ((__u32)(x)) 36#define ext2fs_le32_to_cpu(x) ((__u32)(x)) 37#define ext2fs_cpu_to_le16(x) ((__u16)(x)) 38#define ext2fs_le16_to_cpu(x) ((__u16)(x)) 39#define ext2fs_cpu_to_be32(x) ext2fs_swab32((x)) 40#define ext2fs_be32_to_cpu(x) ext2fs_swab32((x)) 41#define ext2fs_cpu_to_be16(x) ext2fs_swab16((x)) 42#define ext2fs_be16_to_cpu(x) ext2fs_swab16((x)) 43#endif 44 45/* 46 * EXT2FS bitmap manipulation routines. 47 */ 48 49/* Support for sending warning messages from the inline subroutines */ 50extern const char *ext2fs_block_string; 51extern const char *ext2fs_inode_string; 52extern const char *ext2fs_mark_string; 53extern const char *ext2fs_unmark_string; 54extern const char *ext2fs_test_string; 55extern void ext2fs_warn_bitmap(errcode_t errcode, unsigned long arg, 56 const char *description); 57extern void ext2fs_warn_bitmap2(ext2fs_generic_bitmap bitmap, 58 int code, unsigned long arg); 59 60extern int ext2fs_mark_block_bitmap(ext2fs_block_bitmap bitmap, blk_t block); 61extern int ext2fs_unmark_block_bitmap(ext2fs_block_bitmap bitmap, 62 blk_t block); 63extern int ext2fs_test_block_bitmap(ext2fs_block_bitmap bitmap, blk_t block); 64 65extern int ext2fs_mark_inode_bitmap(ext2fs_inode_bitmap bitmap, ext2_ino_t inode); 66extern int ext2fs_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap, 67 ext2_ino_t inode); 68extern int ext2fs_test_inode_bitmap(ext2fs_inode_bitmap bitmap, ext2_ino_t inode); 69 70extern void ext2fs_fast_mark_block_bitmap(ext2fs_block_bitmap bitmap, 71 blk_t block); 72extern void ext2fs_fast_unmark_block_bitmap(ext2fs_block_bitmap bitmap, 73 blk_t block); 74extern int ext2fs_fast_test_block_bitmap(ext2fs_block_bitmap bitmap, 75 blk_t block); 76 77extern void ext2fs_fast_mark_inode_bitmap(ext2fs_inode_bitmap bitmap, 78 ext2_ino_t inode); 79extern void ext2fs_fast_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap, 80 ext2_ino_t inode); 81extern int ext2fs_fast_test_inode_bitmap(ext2fs_inode_bitmap bitmap, 82 ext2_ino_t inode); 83extern blk_t ext2fs_get_block_bitmap_start(ext2fs_block_bitmap bitmap); 84extern ext2_ino_t ext2fs_get_inode_bitmap_start(ext2fs_inode_bitmap bitmap); 85extern blk_t ext2fs_get_block_bitmap_end(ext2fs_block_bitmap bitmap); 86extern ext2_ino_t ext2fs_get_inode_bitmap_end(ext2fs_inode_bitmap bitmap); 87 88extern void ext2fs_mark_block_bitmap_range(ext2fs_block_bitmap bitmap, 89 blk_t block, int num); 90extern void ext2fs_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap, 91 blk_t block, int num); 92extern int ext2fs_test_block_bitmap_range(ext2fs_block_bitmap bitmap, 93 blk_t block, int num); 94extern void ext2fs_fast_mark_block_bitmap_range(ext2fs_block_bitmap bitmap, 95 blk_t block, int num); 96extern void ext2fs_fast_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap, 97 blk_t block, int num); 98extern int ext2fs_fast_test_block_bitmap_range(ext2fs_block_bitmap bitmap, 99 blk_t block, int num); 100extern void ext2fs_set_bitmap_padding(ext2fs_generic_bitmap map); 101 102/* These two routines moved to gen_bitmap.c */ 103extern int ext2fs_mark_generic_bitmap(ext2fs_generic_bitmap bitmap, 104 __u32 bitno); 105extern int ext2fs_unmark_generic_bitmap(ext2fs_generic_bitmap bitmap, 106 blk_t bitno); 107/* 108 * The inline routines themselves... 109 * 110 * If NO_INLINE_FUNCS is defined, then we won't try to do inline 111 * functions at all; they will be included as normal functions in 112 * inline.c 113 */ 114#ifdef NO_INLINE_FUNCS 115#if (defined(__GNUC__) && (defined(__i386__) || defined(__i486__) || \ 116 defined(__i586__) || defined(__mc68000__))) 117 /* This prevents bitops.c from trying to include the C */ 118 /* function version of these functions */ 119#define _EXT2_HAVE_ASM_BITOPS_ 120#endif 121#endif /* NO_INLINE_FUNCS */ 122 123#if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS)) 124#ifdef INCLUDE_INLINE_FUNCS 125#define _INLINE_ extern 126#else 127#ifdef __GNUC__ 128#define _INLINE_ extern __inline__ 129#else /* For Watcom C */ 130#define _INLINE_ extern inline 131#endif 132#endif 133 134/* 135 * Fast bit set/clear functions that doesn't need to return the 136 * previous bit value. 137 */ 138 139_INLINE_ void ext2fs_fast_set_bit(unsigned int nr,void * addr) 140{ 141 unsigned char *ADDR = (unsigned char *) addr; 142 143 ADDR += nr >> 3; 144 *ADDR |= (1 << (nr & 0x07)); 145} 146 147_INLINE_ void ext2fs_fast_clear_bit(unsigned int nr, void * addr) 148{ 149 unsigned char *ADDR = (unsigned char *) addr; 150 151 ADDR += nr >> 3; 152 *ADDR &= ~(1 << (nr & 0x07)); 153} 154 155 156#if ((defined __GNUC__) && !defined(_EXT2_USE_C_VERSIONS_) && \ 157 (defined(__i386__) || defined(__i486__) || defined(__i586__))) 158 159#define _EXT2_HAVE_ASM_BITOPS_ 160#define _EXT2_HAVE_ASM_SWAB_ 161#define _EXT2_HAVE_ASM_FINDBIT_ 162 163/* 164 * These are done by inline assembly for speed reasons..... 165 * 166 * All bitoperations return 0 if the bit was cleared before the 167 * operation and != 0 if it was not. Bit 0 is the LSB of addr; bit 32 168 * is the LSB of (addr+1). 169 */ 170 171/* 172 * Some hacks to defeat gcc over-optimizations.. 173 */ 174struct __dummy_h { unsigned long a[100]; }; 175#define EXT2FS_ADDR (*(struct __dummy_h *) addr) 176#define EXT2FS_CONST_ADDR (*(const struct __dummy_h *) addr) 177 178_INLINE_ int ext2fs_set_bit(unsigned int nr, void * addr) 179{ 180 int oldbit; 181 182 addr = (void *) (((unsigned char *) addr) + (nr >> 3)); 183 __asm__ __volatile__("btsl %2,%1\n\tsbbl %0,%0" 184 :"=r" (oldbit),"=m" (EXT2FS_ADDR) 185 :"r" (nr & 7)); 186 return oldbit; 187} 188 189_INLINE_ int ext2fs_clear_bit(unsigned int nr, void * addr) 190{ 191 int oldbit; 192 193 addr = (void *) (((unsigned char *) addr) + (nr >> 3)); 194 __asm__ __volatile__("btrl %2,%1\n\tsbbl %0,%0" 195 :"=r" (oldbit),"=m" (EXT2FS_ADDR) 196 :"r" (nr & 7)); 197 return oldbit; 198} 199 200_INLINE_ int ext2fs_test_bit(unsigned int nr, const void * addr) 201{ 202 int oldbit; 203 204 addr = (void *) (((unsigned char *) addr) + (nr >> 3)); 205 __asm__ __volatile__("btl %2,%1\n\tsbbl %0,%0" 206 :"=r" (oldbit) 207 :"m" (EXT2FS_CONST_ADDR),"r" (nr & 7)); 208 return oldbit; 209} 210 211#if 0 212_INLINE_ int ext2fs_find_first_bit_set(void * addr, unsigned size) 213{ 214 int d0, d1, d2; 215 int res; 216 217 if (!size) 218 return 0; 219 /* This looks at memory. Mark it volatile to tell gcc not to move it around */ 220 __asm__ __volatile__( 221 "cld\n\t" 222 "xorl %%eax,%%eax\n\t" 223 "xorl %%edx,%%edx\n\t" 224 "repe; scasl\n\t" 225 "je 1f\n\t" 226 "movl -4(%%edi),%%eax\n\t" 227 "subl $4,%%edi\n\t" 228 "bsfl %%eax,%%edx\n" 229 "1:\tsubl %%esi,%%edi\n\t" 230 "shll $3,%%edi\n\t" 231 "addl %%edi,%%edx" 232 :"=d" (res), "=&c" (d0), "=&D" (d1), "=&a" (d2) 233 :"1" ((size + 31) >> 5), "2" (addr), "S" (addr)); 234 return res; 235} 236 237_INLINE_ int ext2fs_find_next_bit_set (void * addr, int size, int offset) 238{ 239 unsigned long * p = ((unsigned long *) addr) + (offset >> 5); 240 int set = 0, bit = offset & 31, res; 241 242 if (bit) { 243 /* 244 * Look for zero in first byte 245 */ 246 __asm__("bsfl %1,%0\n\t" 247 "jne 1f\n\t" 248 "movl $32, %0\n" 249 "1:" 250 : "=r" (set) 251 : "r" (*p >> bit)); 252 if (set < (32 - bit)) 253 return set + offset; 254 set = 32 - bit; 255 p++; 256 } 257 /* 258 * No bit found yet, search remaining full bytes for a bit 259 */ 260 res = ext2fs_find_first_bit_set(p, size - 32 * (p - (unsigned long *) addr)); 261 return (offset + set + res); 262} 263#endif 264 265#ifdef EXT2FS_ENABLE_SWAPFS 266_INLINE_ __u32 ext2fs_swab32(__u32 val) 267{ 268#ifdef EXT2FS_REQUIRE_486 269 __asm__("bswap %0" : "=r" (val) : "0" (val)); 270#else 271 __asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */ 272 "rorl $16,%0\n\t" /* swap words */ 273 "xchgb %b0,%h0" /* swap higher bytes */ 274 :"=q" (val) 275 : "0" (val)); 276#endif 277 return val; 278} 279 280_INLINE_ __u16 ext2fs_swab16(__u16 val) 281{ 282 __asm__("xchgb %b0,%h0" /* swap bytes */ \ 283 : "=q" (val) \ 284 : "0" (val)); \ 285 return val; 286} 287#endif 288 289#undef EXT2FS_ADDR 290 291#endif /* i386 */ 292 293#if ((defined __GNUC__) && !defined(_EXT2_USE_C_VERSIONS_) && \ 294 (defined(__mc68000__))) 295 296#define _EXT2_HAVE_ASM_BITOPS_ 297 298_INLINE_ int ext2fs_set_bit(unsigned int nr,void * addr) 299{ 300 char retval; 301 302 __asm__ __volatile__ ("bfset %2@{%1:#1}; sne %0" 303 : "=d" (retval) : "d" (nr^7), "a" (addr)); 304 305 return retval; 306} 307 308_INLINE_ int ext2fs_clear_bit(unsigned int nr, void * addr) 309{ 310 char retval; 311 312 __asm__ __volatile__ ("bfclr %2@{%1:#1}; sne %0" 313 : "=d" (retval) : "d" (nr^7), "a" (addr)); 314 315 return retval; 316} 317 318_INLINE_ int ext2fs_test_bit(unsigned int nr, const void * addr) 319{ 320 char retval; 321 322 __asm__ __volatile__ ("bftst %2@{%1:#1}; sne %0" 323 : "=d" (retval) : "d" (nr^7), "a" (addr)); 324 325 return retval; 326} 327 328#endif /* __mc68000__ */ 329 330 331#if !defined(_EXT2_HAVE_ASM_SWAB_) && defined(EXT2FS_ENABLE_SWAPFS) 332 333_INLINE_ __u16 ext2fs_swab16(__u16 val) 334{ 335 return (val >> 8) | (val << 8); 336} 337 338_INLINE_ __u32 ext2fs_swab32(__u32 val) 339{ 340 return ((val>>24) | ((val>>8)&0xFF00) | 341 ((val<<8)&0xFF0000) | (val<<24)); 342} 343 344#endif /* !_EXT2_HAVE_ASM_SWAB */ 345 346#if !defined(_EXT2_HAVE_ASM_FINDBIT_) 347_INLINE_ int ext2fs_find_first_bit_set(void * addr, unsigned size) 348{ 349 char *cp = (char *) addr; 350 int res = 0, d0; 351 352 if (!size) 353 return 0; 354 355 while ((size > res) && (*cp == 0)) { 356 cp++; 357 res += 8; 358 } 359 d0 = ffs(*cp); 360 if (d0 == 0) 361 return size; 362 363 return res + d0 - 1; 364} 365 366_INLINE_ int ext2fs_find_next_bit_set (void * addr, int size, int offset) 367{ 368 unsigned char * p; 369 int set = 0, bit = offset & 7, res = 0, d0; 370 371 res = offset >> 3; 372 p = ((unsigned char *) addr) + res; 373 374 if (bit) { 375 set = ffs(*p & ~((1 << bit) - 1)); 376 if (set) 377 return (offset & ~7) + set - 1; 378 p++; 379 res += 8; 380 } 381 while ((size > res) && (*p == 0)) { 382 p++; 383 res += 8; 384 } 385 d0 = ffs(*p); 386 if (d0 == 0) 387 return size; 388 389 return (res + d0 - 1); 390} 391#endif 392 393_INLINE_ int ext2fs_test_generic_bitmap(ext2fs_generic_bitmap bitmap, 394 blk_t bitno); 395 396_INLINE_ int ext2fs_test_generic_bitmap(ext2fs_generic_bitmap bitmap, 397 blk_t bitno) 398{ 399 if ((bitno < bitmap->start) || (bitno > bitmap->end)) { 400 ext2fs_warn_bitmap2(bitmap, EXT2FS_TEST_ERROR, bitno); 401 return 0; 402 } 403 return ext2fs_test_bit(bitno - bitmap->start, bitmap->bitmap); 404} 405 406_INLINE_ int ext2fs_mark_block_bitmap(ext2fs_block_bitmap bitmap, 407 blk_t block) 408{ 409 return ext2fs_mark_generic_bitmap((ext2fs_generic_bitmap) 410 bitmap, 411 block); 412} 413 414_INLINE_ int ext2fs_unmark_block_bitmap(ext2fs_block_bitmap bitmap, 415 blk_t block) 416{ 417 return ext2fs_unmark_generic_bitmap((ext2fs_generic_bitmap) bitmap, 418 block); 419} 420 421_INLINE_ int ext2fs_test_block_bitmap(ext2fs_block_bitmap bitmap, 422 blk_t block) 423{ 424 return ext2fs_test_generic_bitmap((ext2fs_generic_bitmap) bitmap, 425 block); 426} 427 428_INLINE_ int ext2fs_mark_inode_bitmap(ext2fs_inode_bitmap bitmap, 429 ext2_ino_t inode) 430{ 431 return ext2fs_mark_generic_bitmap((ext2fs_generic_bitmap) bitmap, 432 inode); 433} 434 435_INLINE_ int ext2fs_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap, 436 ext2_ino_t inode) 437{ 438 return ext2fs_unmark_generic_bitmap((ext2fs_generic_bitmap) bitmap, 439 inode); 440} 441 442_INLINE_ int ext2fs_test_inode_bitmap(ext2fs_inode_bitmap bitmap, 443 ext2_ino_t inode) 444{ 445 return ext2fs_test_generic_bitmap((ext2fs_generic_bitmap) bitmap, 446 inode); 447} 448 449_INLINE_ void ext2fs_fast_mark_block_bitmap(ext2fs_block_bitmap bitmap, 450 blk_t block) 451{ 452#ifdef EXT2FS_DEBUG_FAST_OPS 453 if ((block < bitmap->start) || (block > bitmap->end)) { 454 ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_MARK, block, 455 bitmap->description); 456 return; 457 } 458#endif 459 ext2fs_fast_set_bit(block - bitmap->start, bitmap->bitmap); 460} 461 462_INLINE_ void ext2fs_fast_unmark_block_bitmap(ext2fs_block_bitmap bitmap, 463 blk_t block) 464{ 465#ifdef EXT2FS_DEBUG_FAST_OPS 466 if ((block < bitmap->start) || (block > bitmap->end)) { 467 ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_UNMARK, 468 block, bitmap->description); 469 return; 470 } 471#endif 472 ext2fs_fast_clear_bit(block - bitmap->start, bitmap->bitmap); 473} 474 475_INLINE_ int ext2fs_fast_test_block_bitmap(ext2fs_block_bitmap bitmap, 476 blk_t block) 477{ 478#ifdef EXT2FS_DEBUG_FAST_OPS 479 if ((block < bitmap->start) || (block > bitmap->end)) { 480 ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_TEST, 481 block, bitmap->description); 482 return 0; 483 } 484#endif 485 return ext2fs_test_bit(block - bitmap->start, bitmap->bitmap); 486} 487 488_INLINE_ void ext2fs_fast_mark_inode_bitmap(ext2fs_inode_bitmap bitmap, 489 ext2_ino_t inode) 490{ 491#ifdef EXT2FS_DEBUG_FAST_OPS 492 if ((inode < bitmap->start) || (inode > bitmap->end)) { 493 ext2fs_warn_bitmap(EXT2_ET_BAD_INODE_MARK, 494 inode, bitmap->description); 495 return; 496 } 497#endif 498 ext2fs_fast_set_bit(inode - bitmap->start, bitmap->bitmap); 499} 500 501_INLINE_ void ext2fs_fast_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap, 502 ext2_ino_t inode) 503{ 504#ifdef EXT2FS_DEBUG_FAST_OPS 505 if ((inode < bitmap->start) || (inode > bitmap->end)) { 506 ext2fs_warn_bitmap(EXT2_ET_BAD_INODE_UNMARK, 507 inode, bitmap->description); 508 return; 509 } 510#endif 511 ext2fs_fast_clear_bit(inode - bitmap->start, bitmap->bitmap); 512} 513 514_INLINE_ int ext2fs_fast_test_inode_bitmap(ext2fs_inode_bitmap bitmap, 515 ext2_ino_t inode) 516{ 517#ifdef EXT2FS_DEBUG_FAST_OPS 518 if ((inode < bitmap->start) || (inode > bitmap->end)) { 519 ext2fs_warn_bitmap(EXT2_ET_BAD_INODE_TEST, 520 inode, bitmap->description); 521 return 0; 522 } 523#endif 524 return ext2fs_test_bit(inode - bitmap->start, bitmap->bitmap); 525} 526 527_INLINE_ blk_t ext2fs_get_block_bitmap_start(ext2fs_block_bitmap bitmap) 528{ 529 return bitmap->start; 530} 531 532_INLINE_ ext2_ino_t ext2fs_get_inode_bitmap_start(ext2fs_inode_bitmap bitmap) 533{ 534 return bitmap->start; 535} 536 537_INLINE_ blk_t ext2fs_get_block_bitmap_end(ext2fs_block_bitmap bitmap) 538{ 539 return bitmap->end; 540} 541 542_INLINE_ ext2_ino_t ext2fs_get_inode_bitmap_end(ext2fs_inode_bitmap bitmap) 543{ 544 return bitmap->end; 545} 546 547_INLINE_ int ext2fs_test_block_bitmap_range(ext2fs_block_bitmap bitmap, 548 blk_t block, int num) 549{ 550 int i; 551 552 if ((block < bitmap->start) || (block+num-1 > bitmap->end)) { 553 ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_TEST, 554 block, bitmap->description); 555 return 0; 556 } 557 for (i=0; i < num; i++) { 558 if (ext2fs_fast_test_block_bitmap(bitmap, block+i)) 559 return 0; 560 } 561 return 1; 562} 563 564_INLINE_ int ext2fs_fast_test_block_bitmap_range(ext2fs_block_bitmap bitmap, 565 blk_t block, int num) 566{ 567 int i; 568 569#ifdef EXT2FS_DEBUG_FAST_OPS 570 if ((block < bitmap->start) || (block+num-1 > bitmap->end)) { 571 ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_TEST, 572 block, bitmap->description); 573 return 0; 574 } 575#endif 576 for (i=0; i < num; i++) { 577 if (ext2fs_fast_test_block_bitmap(bitmap, block+i)) 578 return 0; 579 } 580 return 1; 581} 582 583_INLINE_ void ext2fs_mark_block_bitmap_range(ext2fs_block_bitmap bitmap, 584 blk_t block, int num) 585{ 586 int i; 587 588 if ((block < bitmap->start) || (block+num-1 > bitmap->end)) { 589 ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_MARK, block, 590 bitmap->description); 591 return; 592 } 593 for (i=0; i < num; i++) 594 ext2fs_fast_set_bit(block + i - bitmap->start, bitmap->bitmap); 595} 596 597_INLINE_ void ext2fs_fast_mark_block_bitmap_range(ext2fs_block_bitmap bitmap, 598 blk_t block, int num) 599{ 600 int i; 601 602#ifdef EXT2FS_DEBUG_FAST_OPS 603 if ((block < bitmap->start) || (block+num-1 > bitmap->end)) { 604 ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_MARK, block, 605 bitmap->description); 606 return; 607 } 608#endif 609 for (i=0; i < num; i++) 610 ext2fs_fast_set_bit(block + i - bitmap->start, bitmap->bitmap); 611} 612 613_INLINE_ void ext2fs_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap, 614 blk_t block, int num) 615{ 616 int i; 617 618 if ((block < bitmap->start) || (block+num-1 > bitmap->end)) { 619 ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_UNMARK, block, 620 bitmap->description); 621 return; 622 } 623 for (i=0; i < num; i++) 624 ext2fs_fast_clear_bit(block + i - bitmap->start, 625 bitmap->bitmap); 626} 627 628_INLINE_ void ext2fs_fast_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap, 629 blk_t block, int num) 630{ 631 int i; 632 633#ifdef EXT2FS_DEBUG_FAST_OPS 634 if ((block < bitmap->start) || (block+num-1 > bitmap->end)) { 635 ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_UNMARK, block, 636 bitmap->description); 637 return; 638 } 639#endif 640 for (i=0; i < num; i++) 641 ext2fs_fast_clear_bit(block + i - bitmap->start, 642 bitmap->bitmap); 643} 644#undef _INLINE_ 645#endif 646 647