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7cc112d9 SK |
1 | #ifndef UTIL_LINUX_MINIX_PROGRAMS_H |
2 | #define UTIL_LINUX_MINIX_PROGRAMS_H | |
3 | ||
4 | #include "minix.h" | |
5 | ||
6 | /* | |
7 | * Global variables. | |
8 | */ | |
058cda4c KZ |
9 | extern int fs_version; |
10 | extern char *super_block_buffer; | |
7cc112d9 | 11 | |
058cda4c KZ |
12 | #define Super (*(struct minix_super_block *) super_block_buffer) |
13 | #define Super3 (*(struct minix3_super_block *) super_block_buffer) | |
7cc112d9 | 14 | |
058cda4c KZ |
15 | #define INODE_SIZE (sizeof(struct minix_inode)) |
16 | #define INODE2_SIZE (sizeof(struct minix2_inode)) | |
17 | ||
18 | #define BITS_PER_BLOCK (MINIX_BLOCK_SIZE << 3) | |
19 | ||
20 | #define UPPER(size,n) ((size+((n)-1))/(n)) | |
7cc112d9 SK |
21 | |
22 | /* | |
23 | * Inline functions. | |
24 | */ | |
25 | static inline unsigned long get_ninodes(void) | |
26 | { | |
27 | switch (fs_version) { | |
28 | case 3: | |
29 | return Super3.s_ninodes; | |
30 | default: | |
1908a3c2 | 31 | return Super.s_ninodes; |
7cc112d9 SK |
32 | } |
33 | } | |
34 | ||
35 | static inline unsigned long get_nzones(void) | |
36 | { | |
37 | switch (fs_version) { | |
38 | case 3: | |
1908a3c2 | 39 | return Super3.s_zones; |
7cc112d9 | 40 | case 2: |
1908a3c2 | 41 | return Super.s_zones; |
7cc112d9 | 42 | default: |
1908a3c2 | 43 | return Super.s_nzones; |
7cc112d9 SK |
44 | } |
45 | } | |
46 | ||
47 | static inline unsigned long get_nimaps(void) | |
48 | { | |
49 | switch (fs_version) { | |
50 | case 3: | |
1908a3c2 | 51 | return Super3.s_imap_blocks; |
7cc112d9 | 52 | default: |
1908a3c2 | 53 | return Super.s_imap_blocks; |
7cc112d9 SK |
54 | } |
55 | } | |
56 | ||
57 | static inline unsigned long get_nzmaps(void) | |
58 | { | |
59 | switch (fs_version) { | |
60 | case 3: | |
1908a3c2 | 61 | return Super3.s_zmap_blocks; |
7cc112d9 | 62 | default: |
1908a3c2 | 63 | return Super.s_zmap_blocks; |
7cc112d9 SK |
64 | } |
65 | } | |
66 | ||
1908a3c2 | 67 | static inline off_t get_first_zone(void) |
7cc112d9 SK |
68 | { |
69 | switch (fs_version) { | |
70 | case 3: | |
1908a3c2 | 71 | return Super3.s_firstdatazone; |
7cc112d9 | 72 | default: |
1908a3c2 | 73 | return Super.s_firstdatazone; |
7cc112d9 SK |
74 | } |
75 | } | |
76 | ||
1908a3c2 | 77 | static inline size_t get_zone_size(void) |
7cc112d9 SK |
78 | { |
79 | switch (fs_version) { | |
80 | case 3: | |
1908a3c2 | 81 | return Super3.s_log_zone_size; |
7cc112d9 | 82 | default: |
1908a3c2 | 83 | return Super.s_log_zone_size; |
7cc112d9 SK |
84 | } |
85 | } | |
86 | ||
1908a3c2 | 87 | static inline size_t get_max_size(void) |
7cc112d9 SK |
88 | { |
89 | switch (fs_version) { | |
90 | case 3: | |
1908a3c2 | 91 | return Super3.s_max_size; |
7cc112d9 | 92 | default: |
1908a3c2 | 93 | return Super.s_max_size; |
7cc112d9 SK |
94 | } |
95 | } | |
96 | ||
1908a3c2 | 97 | static inline unsigned long inode_blocks(void) |
7cc112d9 SK |
98 | { |
99 | switch (fs_version) { | |
100 | case 3: | |
101 | case 2: | |
102 | return UPPER(get_ninodes(), MINIX2_INODES_PER_BLOCK); | |
103 | default: | |
104 | return UPPER(get_ninodes(), MINIX_INODES_PER_BLOCK); | |
105 | } | |
106 | } | |
107 | ||
1908a3c2 | 108 | static inline off_t first_zone_data(void) |
7cc112d9 SK |
109 | { |
110 | return 2 + get_nimaps() + get_nzmaps() + inode_blocks(); | |
111 | } | |
112 | ||
1908a3c2 | 113 | static inline size_t get_inode_buffer_size(void) |
7cc112d9 SK |
114 | { |
115 | return inode_blocks() * MINIX_BLOCK_SIZE; | |
116 | } | |
117 | ||
118 | #endif /* UTIL_LINUX_MINIX_PROGRAMS_H */ |