1 | /*
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2 | * bitops.h --- Bitmap frobbing code. The byte swapping routines are
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3 | * also included here.
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4 | *
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5 | * Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
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6 | *
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7 | * %Begin-Header%
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8 | * This file may be redistributed under the terms of the GNU Public
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9 | * License.
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10 | * %End-Header%
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11 | *
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12 | * i386 bitops operations taken from <asm/bitops.h>, Copyright 1992,
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13 | * Linus Torvalds.
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14 | */
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15 |
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16 | #include <string.h>
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17 | #include <strings.h>
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18 |
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19 | extern int ext2fs_set_bit(unsigned int nr,void * addr);
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20 | extern int ext2fs_clear_bit(unsigned int nr, void * addr);
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21 | extern int ext2fs_test_bit(unsigned int nr, const void * addr);
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22 | extern __u16 ext2fs_swab16(__u16 val);
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23 | extern __u32 ext2fs_swab32(__u32 val);
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24 |
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25 | #ifdef WORDS_BIGENDIAN
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26 | #define ext2fs_cpu_to_le32(x) ext2fs_swab32((x))
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27 | #define ext2fs_le32_to_cpu(x) ext2fs_swab32((x))
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28 | #define ext2fs_cpu_to_le16(x) ext2fs_swab16((x))
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29 | #define ext2fs_le16_to_cpu(x) ext2fs_swab16((x))
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30 | #define ext2fs_cpu_to_be32(x) ((__u32)(x))
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31 | #define ext2fs_be32_to_cpu(x) ((__u32)(x))
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32 | #define ext2fs_cpu_to_be16(x) ((__u16)(x))
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33 | #define ext2fs_be16_to_cpu(x) ((__u16)(x))
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34 | #else
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35 | #define ext2fs_cpu_to_le32(x) ((__u32)(x))
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36 | #define ext2fs_le32_to_cpu(x) ((__u32)(x))
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37 | #define ext2fs_cpu_to_le16(x) ((__u16)(x))
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38 | #define ext2fs_le16_to_cpu(x) ((__u16)(x))
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39 | #define ext2fs_cpu_to_be32(x) ext2fs_swab32((x))
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40 | #define ext2fs_be32_to_cpu(x) ext2fs_swab32((x))
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41 | #define ext2fs_cpu_to_be16(x) ext2fs_swab16((x))
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42 | #define ext2fs_be16_to_cpu(x) ext2fs_swab16((x))
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43 | #endif
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44 |
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45 | /*
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46 | * EXT2FS bitmap manipulation routines.
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47 | */
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48 |
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49 | /* Support for sending warning messages from the inline subroutines */
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50 | extern const char *ext2fs_block_string;
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51 | extern const char *ext2fs_inode_string;
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52 | extern const char *ext2fs_mark_string;
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53 | extern const char *ext2fs_unmark_string;
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54 | extern const char *ext2fs_test_string;
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55 | extern void ext2fs_warn_bitmap(errcode_t errcode, unsigned long arg,
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56 | const char *description);
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57 | extern void ext2fs_warn_bitmap2(ext2fs_generic_bitmap bitmap,
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58 | int code, unsigned long arg);
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59 |
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60 | extern int ext2fs_mark_block_bitmap(ext2fs_block_bitmap bitmap, blk_t block);
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61 | extern int ext2fs_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
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62 | blk_t block);
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63 | extern int ext2fs_test_block_bitmap(ext2fs_block_bitmap bitmap, blk_t block);
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64 |
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65 | extern int ext2fs_mark_inode_bitmap(ext2fs_inode_bitmap bitmap, ext2_ino_t inode);
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66 | extern int ext2fs_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
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67 | ext2_ino_t inode);
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68 | extern int ext2fs_test_inode_bitmap(ext2fs_inode_bitmap bitmap, ext2_ino_t inode);
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69 |
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70 | extern void ext2fs_fast_mark_block_bitmap(ext2fs_block_bitmap bitmap,
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71 | blk_t block);
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72 | extern void ext2fs_fast_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
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73 | blk_t block);
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74 | extern int ext2fs_fast_test_block_bitmap(ext2fs_block_bitmap bitmap,
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75 | blk_t block);
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76 |
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77 | extern void ext2fs_fast_mark_inode_bitmap(ext2fs_inode_bitmap bitmap,
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78 | ext2_ino_t inode);
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79 | extern void ext2fs_fast_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
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80 | ext2_ino_t inode);
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81 | extern int ext2fs_fast_test_inode_bitmap(ext2fs_inode_bitmap bitmap,
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82 | ext2_ino_t inode);
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83 | extern blk_t ext2fs_get_block_bitmap_start(ext2fs_block_bitmap bitmap);
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84 | extern ext2_ino_t ext2fs_get_inode_bitmap_start(ext2fs_inode_bitmap bitmap);
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85 | extern blk_t ext2fs_get_block_bitmap_end(ext2fs_block_bitmap bitmap);
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86 | extern ext2_ino_t ext2fs_get_inode_bitmap_end(ext2fs_inode_bitmap bitmap);
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87 |
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88 | extern void ext2fs_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
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89 | blk_t block, int num);
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90 | extern void ext2fs_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
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91 | blk_t block, int num);
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92 | extern int ext2fs_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
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93 | blk_t block, int num);
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94 | extern void ext2fs_fast_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
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95 | blk_t block, int num);
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96 | extern void ext2fs_fast_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
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97 | blk_t block, int num);
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98 | extern int ext2fs_fast_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
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99 | blk_t block, int num);
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100 | extern void ext2fs_set_bitmap_padding(ext2fs_generic_bitmap map);
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101 |
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102 | /* These two routines moved to gen_bitmap.c */
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103 | extern int ext2fs_mark_generic_bitmap(ext2fs_generic_bitmap bitmap,
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104 | __u32 bitno);
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105 | extern int ext2fs_unmark_generic_bitmap(ext2fs_generic_bitmap bitmap,
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106 | blk_t bitno);
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