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 17 extern int ext2fs_set_bit(unsigned int nr,void * addr); 18 extern int ext2fs_clear_bit(unsigned int nr, void * addr); 19 extern int ext2fs_test_bit(unsigned int nr, const void * addr); 20 extern void ext2fs_fast_set_bit(unsigned int nr,void * addr); 21 extern void ext2fs_fast_clear_bit(unsigned int nr, void * addr); 22 extern __u16 ext2fs_swab16(__u16 val); 23 extern __u32 ext2fs_swab32(__u32 val); 24 extern __u64 ext2fs_swab64(__u64 val); 25 26 #ifdef WORDS_BIGENDIAN 27 #define ext2fs_cpu_to_le64(x) ext2fs_swab64((x)) 28 #define ext2fs_le64_to_cpu(x) ext2fs_swab64((x)) 29 #define ext2fs_cpu_to_le32(x) ext2fs_swab32((x)) 30 #define ext2fs_le32_to_cpu(x) ext2fs_swab32((x)) 31 #define ext2fs_cpu_to_le16(x) ext2fs_swab16((x)) 32 #define ext2fs_le16_to_cpu(x) ext2fs_swab16((x)) 33 #define ext2fs_cpu_to_be32(x) ((__u32)(x)) 34 #define ext2fs_be32_to_cpu(x) ((__u32)(x)) 35 #define ext2fs_cpu_to_be16(x) ((__u16)(x)) 36 #define ext2fs_be16_to_cpu(x) ((__u16)(x)) 37 #else 38 #define ext2fs_cpu_to_le64(x) ((__u64)(x)) 39 #define ext2fs_le64_to_cpu(x) ((__u64)(x)) 40 #define ext2fs_cpu_to_le32(x) ((__u32)(x)) 41 #define ext2fs_le32_to_cpu(x) ((__u32)(x)) 42 #define ext2fs_cpu_to_le16(x) ((__u16)(x)) 43 #define ext2fs_le16_to_cpu(x) ((__u16)(x)) 44 #define ext2fs_cpu_to_be32(x) ext2fs_swab32((x)) 45 #define ext2fs_be32_to_cpu(x) ext2fs_swab32((x)) 46 #define ext2fs_cpu_to_be16(x) ext2fs_swab16((x)) 47 #define ext2fs_be16_to_cpu(x) ext2fs_swab16((x)) 48 #endif 49 50 /* 51 * EXT2FS bitmap manipulation routines. 52 */ 53 54 /* Support for sending warning messages from the inline subroutines */ 55 extern const char *ext2fs_block_string; 56 extern const char *ext2fs_inode_string; 57 extern const char *ext2fs_mark_string; 58 extern const char *ext2fs_unmark_string; 59 extern const char *ext2fs_test_string; 60 extern void ext2fs_warn_bitmap(errcode_t errcode, unsigned long arg, 61 const char *description); 62 extern void ext2fs_warn_bitmap2(ext2fs_generic_bitmap bitmap, 63 int code, unsigned long arg); 64 65 extern int ext2fs_mark_block_bitmap(ext2fs_block_bitmap bitmap, blk_t block); 66 extern int ext2fs_unmark_block_bitmap(ext2fs_block_bitmap bitmap, 67 blk_t block); 68 extern int ext2fs_test_block_bitmap(ext2fs_block_bitmap bitmap, blk_t block); 69 70 extern int ext2fs_mark_inode_bitmap(ext2fs_inode_bitmap bitmap, ext2_ino_t inode); 71 extern int ext2fs_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap, 72 ext2_ino_t inode); 73 extern int ext2fs_test_inode_bitmap(ext2fs_inode_bitmap bitmap, ext2_ino_t inode); 74 75 extern void ext2fs_fast_mark_block_bitmap(ext2fs_block_bitmap bitmap, 76 blk_t block); 77 extern void ext2fs_fast_unmark_block_bitmap(ext2fs_block_bitmap bitmap, 78 blk_t block); 79 extern int ext2fs_fast_test_block_bitmap(ext2fs_block_bitmap bitmap, 80 blk_t block); 81 82 extern void ext2fs_fast_mark_inode_bitmap(ext2fs_inode_bitmap bitmap, 83 ext2_ino_t inode); 84 extern void ext2fs_fast_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap, 85 ext2_ino_t inode); 86 extern int ext2fs_fast_test_inode_bitmap(ext2fs_inode_bitmap bitmap, 87 ext2_ino_t inode); 88 extern blk_t ext2fs_get_block_bitmap_start(ext2fs_block_bitmap bitmap); 89 extern ext2_ino_t ext2fs_get_inode_bitmap_start(ext2fs_inode_bitmap bitmap); 90 extern blk_t ext2fs_get_block_bitmap_end(ext2fs_block_bitmap bitmap); 91 extern ext2_ino_t ext2fs_get_inode_bitmap_end(ext2fs_inode_bitmap bitmap); 92 93 extern void ext2fs_mark_block_bitmap_range(ext2fs_block_bitmap bitmap, 94 blk_t block, int num); 95 extern void ext2fs_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap, 96 blk_t block, int num); 97 extern int ext2fs_test_block_bitmap_range(ext2fs_block_bitmap bitmap, 98 blk_t block, int num); 99 extern void ext2fs_fast_mark_block_bitmap_range(ext2fs_block_bitmap bitmap, 100 blk_t block, int num); 101 extern void ext2fs_fast_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap, 102 blk_t block, int num); 103 extern int ext2fs_fast_test_block_bitmap_range(ext2fs_block_bitmap bitmap, 104 blk_t block, int num); 105 extern void ext2fs_set_bitmap_padding(ext2fs_generic_bitmap map); 106 107 /* These two routines moved to gen_bitmap.c */ 108 extern int ext2fs_mark_generic_bitmap(ext2fs_generic_bitmap bitmap, 109 __u32 bitno); 110 extern int ext2fs_unmark_generic_bitmap(ext2fs_generic_bitmap bitmap, 111 blk_t bitno); 112 /* 113 * The inline routines themselves... 114 * 115 * If NO_INLINE_FUNCS is defined, then we won't try to do inline 116 * functions at all; they will be included as normal functions in 117 * inline.c 118 */ 119 #ifdef NO_INLINE_FUNCS 120 #if (defined(__GNUC__) && (defined(__i386__) || defined(__i486__) || \ 121 defined(__i586__) || defined(__mc68000__))) 122 /* This prevents bitops.c from trying to include the C */ 123 /* function version of these functions */ 124 #define _EXT2_HAVE_ASM_BITOPS_ 125 #endif 126 #endif /* NO_INLINE_FUNCS */ 127 128 #if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS)) 129 #ifdef INCLUDE_INLINE_FUNCS 130 #define _INLINE_ extern 131 #else 132 #ifdef __GNUC__ 133 #define _INLINE_ extern __inline__ 134 #else /* For Watcom C */ 135 #define _INLINE_ extern inline 136 #endif 137 #endif 138 139 /* 140 * Fast bit set/clear functions that doesn't need to return the 141 * previous bit value. 142 */ 143 144 _INLINE_ void ext2fs_fast_set_bit(unsigned int nr,void * addr) 145 { 146 unsigned char *ADDR = (unsigned char *) addr; 147 148 ADDR += nr >> 3; 149 *ADDR |= (1 << (nr & 0x07)); 150 } 151 152 _INLINE_ void ext2fs_fast_clear_bit(unsigned int nr, void * addr) 153 { 154 unsigned char *ADDR = (unsigned char *) addr; 155 156 ADDR += nr >> 3; 157 *ADDR &= ~(1 << (nr & 0x07)); 158 } 159 160 161 #if ((defined __GNUC__) && !defined(_EXT2_USE_C_VERSIONS_) && \ 162 (defined(__i386__) || defined(__i486__) || defined(__i586__))) 163 164 #define _EXT2_HAVE_ASM_BITOPS_ 165 #define _EXT2_HAVE_ASM_SWAB_ 166 #define _EXT2_HAVE_ASM_FINDBIT_ 167 168 /* 169 * These are done by inline assembly for speed reasons..... 170 * 171 * All bitoperations return 0 if the bit was cleared before the 172 * operation and != 0 if it was not. Bit 0 is the LSB of addr; bit 32 173 * is the LSB of (addr+1). 174 */ 175 176 /* 177 * Some hacks to defeat gcc over-optimizations.. 178 */ 179 struct __dummy_h { unsigned long a[100]; }; 180 #define EXT2FS_ADDR (*(struct __dummy_h *) addr) 181 #define EXT2FS_CONST_ADDR (*(const struct __dummy_h *) addr) 182 183 _INLINE_ int ext2fs_set_bit(unsigned int nr, void * addr) 184 { 185 int oldbit; 186 187 addr = (void *) (((unsigned char *) addr) + (nr >> 3)); 188 __asm__ __volatile__("btsl %2,%1\n\tsbbl %0,%0" 189 :"=r" (oldbit),"+m" (EXT2FS_ADDR) 190 :"r" (nr & 7)); 191 return oldbit; 192 } 193 194 _INLINE_ int ext2fs_clear_bit(unsigned int nr, void * addr) 195 { 196 int oldbit; 197 198 addr = (void *) (((unsigned char *) addr) + (nr >> 3)); 199 __asm__ __volatile__("btrl %2,%1\n\tsbbl %0,%0" 200 :"=r" (oldbit),"+m" (EXT2FS_ADDR) 201 :"r" (nr & 7)); 202 return oldbit; 203 } 204 205 _INLINE_ int ext2fs_test_bit(unsigned int nr, const void * addr) 206 { 207 int oldbit; 208 209 addr = (const void *) (((const unsigned char *) addr) + (nr >> 3)); 210 __asm__ __volatile__("btl %2,%1\n\tsbbl %0,%0" 211 :"=r" (oldbit) 212 :"m" (EXT2FS_CONST_ADDR),"r" (nr & 7)); 213 return oldbit; 214 } 215 216 #if 0 217 _INLINE_ int ext2fs_find_first_bit_set(void * addr, unsigned size) 218 { 219 int d0, d1, d2; 220 int res; 221 222 if (!size) 223 return 0; 224 /* This looks at memory. Mark it volatile to tell gcc not to move it around */ 225 __asm__ __volatile__( 226 "cld\n\t" 227 "xorl %%eax,%%eax\n\t" 228 "xorl %%edx,%%edx\n\t" 229 "repe; scasl\n\t" 230 "je 1f\n\t" 231 "movl -4(%%edi),%%eax\n\t" 232 "subl $4,%%edi\n\t" 233 "bsfl %%eax,%%edx\n" 234 "1:\tsubl %%esi,%%edi\n\t" 235 "shll $3,%%edi\n\t" 236 "addl %%edi,%%edx" 237 :"=d" (res), "=&c" (d0), "=&D" (d1), "=&a" (d2) 238 :"1" ((size + 31) >> 5), "2" (addr), "S" (addr)); 239 return res; 240 } 241 242 _INLINE_ int ext2fs_find_next_bit_set (void * addr, int size, int offset) 243 { 244 unsigned long * p = ((unsigned long *) addr) + (offset >> 5); 245 int set = 0, bit = offset & 31, res; 246 247 if (bit) { 248 /* 249 * Look for zero in first byte 250 */ 251 __asm__("bsfl %1,%0\n\t" 252 "jne 1f\n\t" 253 "movl $32, %0\n" 254 "1:" 255 : "=r" (set) 256 : "r" (*p >> bit)); 257 if (set < (32 - bit)) 258 return set + offset; 259 set = 32 - bit; 260 p++; 261 } 262 /* 263 * No bit found yet, search remaining full bytes for a bit 264 */ 265 res = ext2fs_find_first_bit_set(p, size - 32 * (p - (unsigned long *) addr)); 266 return (offset + set + res); 267 } 268 #endif 269 270 #ifdef EXT2FS_ENABLE_SWAPFS 271 _INLINE_ __u32 ext2fs_swab32(__u32 val) 272 { 273 #ifdef EXT2FS_REQUIRE_486 274 __asm__("bswap %0" : "=r" (val) : "0" (val)); 275 #else 276 __asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */ 277 "rorl $16,%0\n\t" /* swap words */ 278 "xchgb %b0,%h0" /* swap higher bytes */ 279 :"=q" (val) 280 : "0" (val)); 281 #endif 282 return val; 283 } 284 285 _INLINE_ __u16 ext2fs_swab16(__u16 val) 286 { 287 __asm__("xchgb %b0,%h0" /* swap bytes */ \ 288 : "=q" (val) \ 289 : "0" (val)); \ 290 return val; 291 } 292 293 _INLINE_ __u64 ext2fs_swab64(__u64 val) 294 { 295 return (ext2fs_swab32(val >> 32) | 296 (((__u64)ext2fs_swab32(val & 0xFFFFFFFFUL)) << 32)); 297 } 298 #endif 299 300 #undef EXT2FS_ADDR 301 302 #endif /* i386 */ 303 304 #if ((defined __GNUC__) && !defined(_EXT2_USE_C_VERSIONS_) && \ 305 (defined(__mc68000__))) 306 307 #define _EXT2_HAVE_ASM_BITOPS_ 308 309 _INLINE_ int ext2fs_set_bit(unsigned int nr,void * addr) 310 { 311 char retval; 312 313 __asm__ __volatile__ ("bfset %2@{%1:#1}; sne %0" 314 : "=d" (retval) : "d" (nr^7), "a" (addr)); 315 316 return retval; 317 } 318 319 _INLINE_ int ext2fs_clear_bit(unsigned int nr, void * addr) 320 { 321 char retval; 322 323 __asm__ __volatile__ ("bfclr %2@{%1:#1}; sne %0" 324 : "=d" (retval) : "d" (nr^7), "a" (addr)); 325 326 return retval; 327 } 328 329 _INLINE_ int ext2fs_test_bit(unsigned int nr, const void * addr) 330 { 331 char retval; 332 333 __asm__ __volatile__ ("bftst %2@{%1:#1}; sne %0" 334 : "=d" (retval) : "d" (nr^7), "a" (addr)); 335 336 return retval; 337 } 338 339 #endif /* __mc68000__ */ 340 341 342 #if !defined(_EXT2_HAVE_ASM_SWAB_) && defined(EXT2FS_ENABLE_SWAPFS) 343 344 _INLINE_ __u16 ext2fs_swab16(__u16 val) 345 { 346 return (val >> 8) | (val << 8); 347 } 348 349 _INLINE_ __u32 ext2fs_swab32(__u32 val) 350 { 351 return ((val>>24) | ((val>>8)&0xFF00) | 352 ((val<<8)&0xFF0000) | (val<<24)); 353 } 354 355 #endif /* !_EXT2_HAVE_ASM_SWAB */ 356 357 #if !defined(_EXT2_HAVE_ASM_FINDBIT_) 358 _INLINE_ int ext2fs_find_first_bit_set(void * addr, unsigned size) 359 { 360 char *cp = (char *) addr; 361 int res = 0, d0; 362 363 if (!size) 364 return 0; 365 366 while ((size > res) && (*cp == 0)) { 367 cp++; 368 res += 8; 369 } 370 d0 = ffs(*cp); 371 if (d0 == 0) 372 return size; 373 374 return res + d0 - 1; 375 } 376 377 _INLINE_ int ext2fs_find_next_bit_set (void * addr, int size, int offset) 378 { 379 unsigned char * p; 380 int set = 0, bit = offset & 7, res = 0, d0; 381 382 res = offset >> 3; 383 p = ((unsigned char *) addr) + res; 384 385 if (bit) { 386 set = ffs(*p & ~((1 << bit) - 1)); 387 if (set) 388 return (offset & ~7) + set - 1; 389 p++; 390 res += 8; 391 } 392 while ((size > res) && (*p == 0)) { 393 p++; 394 res += 8; 395 } 396 d0 = ffs(*p); 397 if (d0 == 0) 398 return size; 399 400 return (res + d0 - 1); 401 } 402 #endif 403 404 _INLINE_ int ext2fs_test_generic_bitmap(ext2fs_generic_bitmap bitmap, 405 blk_t bitno); 406 407 _INLINE_ int ext2fs_test_generic_bitmap(ext2fs_generic_bitmap bitmap, 408 blk_t bitno) 409 { 410 if ((bitno < bitmap->start) || (bitno > bitmap->end)) { 411 ext2fs_warn_bitmap2(bitmap, EXT2FS_TEST_ERROR, bitno); 412 return 0; 413 } 414 return ext2fs_test_bit(bitno - bitmap->start, bitmap->bitmap); 415 } 416 417 _INLINE_ int ext2fs_mark_block_bitmap(ext2fs_block_bitmap bitmap, 418 blk_t block) 419 { 420 return ext2fs_mark_generic_bitmap((ext2fs_generic_bitmap) 421 bitmap, 422 block); 423 } 424 425 _INLINE_ int ext2fs_unmark_block_bitmap(ext2fs_block_bitmap bitmap, 426 blk_t block) 427 { 428 return ext2fs_unmark_generic_bitmap((ext2fs_generic_bitmap) bitmap, 429 block); 430 } 431 432 _INLINE_ int ext2fs_test_block_bitmap(ext2fs_block_bitmap bitmap, 433 blk_t block) 434 { 435 return ext2fs_test_generic_bitmap((ext2fs_generic_bitmap) bitmap, 436 block); 437 } 438 439 _INLINE_ int ext2fs_mark_inode_bitmap(ext2fs_inode_bitmap bitmap, 440 ext2_ino_t inode) 441 { 442 return ext2fs_mark_generic_bitmap((ext2fs_generic_bitmap) bitmap, 443 inode); 444 } 445 446 _INLINE_ int ext2fs_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap, 447 ext2_ino_t inode) 448 { 449 return ext2fs_unmark_generic_bitmap((ext2fs_generic_bitmap) bitmap, 450 inode); 451 } 452 453 _INLINE_ int ext2fs_test_inode_bitmap(ext2fs_inode_bitmap bitmap, 454 ext2_ino_t inode) 455 { 456 return ext2fs_test_generic_bitmap((ext2fs_generic_bitmap) bitmap, 457 inode); 458 } 459 460 _INLINE_ void ext2fs_fast_mark_block_bitmap(ext2fs_block_bitmap bitmap, 461 blk_t block) 462 { 463 #ifdef EXT2FS_DEBUG_FAST_OPS 464 if ((block < bitmap->start) || (block > bitmap->end)) { 465 ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_MARK, block, 466 bitmap->description); 467 return; 468 } 469 #endif 470 ext2fs_fast_set_bit(block - bitmap->start, bitmap->bitmap); 471 } 472 473 _INLINE_ void ext2fs_fast_unmark_block_bitmap(ext2fs_block_bitmap bitmap, 474 blk_t block) 475 { 476 #ifdef EXT2FS_DEBUG_FAST_OPS 477 if ((block < bitmap->start) || (block > bitmap->end)) { 478 ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_UNMARK, 479 block, bitmap->description); 480 return; 481 } 482 #endif 483 ext2fs_fast_clear_bit(block - bitmap->start, bitmap->bitmap); 484 } 485 486 _INLINE_ int ext2fs_fast_test_block_bitmap(ext2fs_block_bitmap bitmap, 487 blk_t block) 488 { 489 #ifdef EXT2FS_DEBUG_FAST_OPS 490 if ((block < bitmap->start) || (block > bitmap->end)) { 491 ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_TEST, 492 block, bitmap->description); 493 return 0; 494 } 495 #endif 496 return ext2fs_test_bit(block - bitmap->start, bitmap->bitmap); 497 } 498 499 _INLINE_ void ext2fs_fast_mark_inode_bitmap(ext2fs_inode_bitmap bitmap, 500 ext2_ino_t inode) 501 { 502 #ifdef EXT2FS_DEBUG_FAST_OPS 503 if ((inode < bitmap->start) || (inode > bitmap->end)) { 504 ext2fs_warn_bitmap(EXT2_ET_BAD_INODE_MARK, 505 inode, bitmap->description); 506 return; 507 } 508 #endif 509 ext2fs_fast_set_bit(inode - bitmap->start, bitmap->bitmap); 510 } 511 512 _INLINE_ void ext2fs_fast_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap, 513 ext2_ino_t inode) 514 { 515 #ifdef EXT2FS_DEBUG_FAST_OPS 516 if ((inode < bitmap->start) || (inode > bitmap->end)) { 517 ext2fs_warn_bitmap(EXT2_ET_BAD_INODE_UNMARK, 518 inode, bitmap->description); 519 return; 520 } 521 #endif 522 ext2fs_fast_clear_bit(inode - bitmap->start, bitmap->bitmap); 523 } 524 525 _INLINE_ int ext2fs_fast_test_inode_bitmap(ext2fs_inode_bitmap bitmap, 526 ext2_ino_t inode) 527 { 528 #ifdef EXT2FS_DEBUG_FAST_OPS 529 if ((inode < bitmap->start) || (inode > bitmap->end)) { 530 ext2fs_warn_bitmap(EXT2_ET_BAD_INODE_TEST, 531 inode, bitmap->description); 532 return 0; 533 } 534 #endif 535 return ext2fs_test_bit(inode - bitmap->start, bitmap->bitmap); 536 } 537 538 _INLINE_ blk_t ext2fs_get_block_bitmap_start(ext2fs_block_bitmap bitmap) 539 { 540 return bitmap->start; 541 } 542 543 _INLINE_ ext2_ino_t ext2fs_get_inode_bitmap_start(ext2fs_inode_bitmap bitmap) 544 { 545 return bitmap->start; 546 } 547 548 _INLINE_ blk_t ext2fs_get_block_bitmap_end(ext2fs_block_bitmap bitmap) 549 { 550 return bitmap->end; 551 } 552 553 _INLINE_ ext2_ino_t ext2fs_get_inode_bitmap_end(ext2fs_inode_bitmap bitmap) 554 { 555 return bitmap->end; 556 } 557 558 _INLINE_ int ext2fs_test_block_bitmap_range(ext2fs_block_bitmap bitmap, 559 blk_t block, int num) 560 { 561 int i; 562 563 if ((block < bitmap->start) || (block+num-1 > bitmap->end)) { 564 ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_TEST, 565 block, bitmap->description); 566 return 0; 567 } 568 for (i=0; i < num; i++) { 569 if (ext2fs_fast_test_block_bitmap(bitmap, block+i)) 570 return 0; 571 } 572 return 1; 573 } 574 575 _INLINE_ int ext2fs_fast_test_block_bitmap_range(ext2fs_block_bitmap bitmap, 576 blk_t block, int num) 577 { 578 int i; 579 580 #ifdef EXT2FS_DEBUG_FAST_OPS 581 if ((block < bitmap->start) || (block+num-1 > bitmap->end)) { 582 ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_TEST, 583 block, bitmap->description); 584 return 0; 585 } 586 #endif 587 for (i=0; i < num; i++) { 588 if (ext2fs_fast_test_block_bitmap(bitmap, block+i)) 589 return 0; 590 } 591 return 1; 592 } 593 594 _INLINE_ void ext2fs_mark_block_bitmap_range(ext2fs_block_bitmap bitmap, 595 blk_t block, int num) 596 { 597 int i; 598 599 if ((block < bitmap->start) || (block+num-1 > bitmap->end)) { 600 ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_MARK, block, 601 bitmap->description); 602 return; 603 } 604 for (i=0; i < num; i++) 605 ext2fs_fast_set_bit(block + i - bitmap->start, bitmap->bitmap); 606 } 607 608 _INLINE_ void ext2fs_fast_mark_block_bitmap_range(ext2fs_block_bitmap bitmap, 609 blk_t block, int num) 610 { 611 int i; 612 613 #ifdef EXT2FS_DEBUG_FAST_OPS 614 if ((block < bitmap->start) || (block+num-1 > bitmap->end)) { 615 ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_MARK, block, 616 bitmap->description); 617 return; 618 } 619 #endif 620 for (i=0; i < num; i++) 621 ext2fs_fast_set_bit(block + i - bitmap->start, bitmap->bitmap); 622 } 623 624 _INLINE_ void ext2fs_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap, 625 blk_t block, int num) 626 { 627 int i; 628 629 if ((block < bitmap->start) || (block+num-1 > bitmap->end)) { 630 ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_UNMARK, block, 631 bitmap->description); 632 return; 633 } 634 for (i=0; i < num; i++) 635 ext2fs_fast_clear_bit(block + i - bitmap->start, 636 bitmap->bitmap); 637 } 638 639 _INLINE_ void ext2fs_fast_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap, 640 blk_t block, int num) 641 { 642 int i; 643 644 #ifdef EXT2FS_DEBUG_FAST_OPS 645 if ((block < bitmap->start) || (block+num-1 > bitmap->end)) { 646 ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_UNMARK, block, 647 bitmap->description); 648 return; 649 } 650 #endif 651 for (i=0; i < num; i++) 652 ext2fs_fast_clear_bit(block + i - bitmap->start, 653 bitmap->bitmap); 654 } 655 #undef _INLINE_ 656 #endif 657 658
