2 * Author: Kent Overstreet <kmo@daterainc.com>
10 #include <linux/bcache.h>
23 #define SB_START (SB_SECTOR * 512)
25 #define MAX_DEVS MAX_CACHES_PER_SET
27 #define min(x, y) ({ \
28 typeof(x) _min1 = (x); \
29 typeof(y) _min2 = (y); \
30 (void) (&_min1 == &_min2); \
31 _min1 < _min2 ? _min1 : _min2; })
33 #define max(x, y) ({ \
34 typeof(x) _max1 = (x); \
35 typeof(y) _max2 = (y); \
36 (void) (&_max1 == &_max2); \
37 _max1 > _max2 ? _max1 : _max2; })
39 #define __bkey_idx(_set, _offset) \
40 ((_set)->_data + (_offset))
42 #define bkey_idx(_set, _offset) \
43 ((typeof(&(_set)->start[0])) __bkey_idx((_set), (_offset)))
45 #define bkey_next(_k) \
46 ((typeof(_k)) __bkey_idx(_k, (_k)->u64s))
48 #define __bset_bkey_last(_set) \
49 __bkey_idx((_set), (_set)->u64s)
51 #define bset_bkey_last(_set) \
52 bkey_idx((_set), (_set)->u64s)
54 extern const char * const cache_state[];
55 extern const char * const replacement_policies[];
56 extern const char * const csum_types[];
57 extern const char * const error_actions[];
58 extern const char * const bdev_cache_mode[];
59 extern const char * const bdev_state[];
60 extern const char * const set_attr[];
61 extern const char * const cache_attrs[];
62 extern const char * const internal_attrs[];
64 ssize_t read_string_list(const char *, const char * const[]);
65 ssize_t read_string_list_or_die(const char *, const char * const[],
67 void print_string_list(const char * const[], size_t);
69 uint64_t bch_checksum(unsigned, const void *, size_t);
71 uint64_t getblocks(int);
72 uint64_t hatoi(const char *);
73 unsigned hatoi_validate(const char *, const char *);
74 void do_write_sb(int, struct cache_sb *);
75 void write_backingdev_sb(int, unsigned, unsigned, uint64_t,
76 const char *, uuid_le, uuid_le);
77 int dev_open(const char *);
78 unsigned get_blocksize(const char *, int);
79 long strtoul_or_die(const char *, size_t, const char *);
81 void show_super_backingdev(struct cache_sb *, bool);
82 void show_super_cache(struct cache_sb *, bool);
84 enum sysfs_attr {SET_ATTR, CACHE_ATTR, INTERNAL_ATTR};
86 enum sysfs_attr sysfs_attr_type(const char *attr);
87 void sysfs_attr_list();
89 struct cache_sb *query_dev(char *, bool, bool, bool, char *dev_uuid);
90 char *list_cachesets(char *, bool);
91 char *parse_array_to_list(char *const *);
92 char *register_bcache(char *const *);
93 char *unregister_bcache(char *const *);
94 char *probe(char *, int);
95 char *read_stat_dir(DIR *, char *, char *, char *);
96 char *find_matching_uuid(char *, char *, const char*);
97 char *add_devices(char *const *);
98 char *remove_device(const char *, bool);
99 char *bcache_get_capacity(const char *, const char *, bool);
100 char *dev_name(const char *);
101 char *device_set_failed(const char *dev_uuid);
103 #define csum_set(i, type) \
105 void *start = ((void *) (i)) + sizeof(uint64_t); \
106 void *end = __bset_bkey_last(i); \
108 bch_checksum(type, start, end - start); \
111 #define die(arg, ...) \
113 fprintf(stderr, arg "\n", ##__VA_ARGS__); \
114 exit(EXIT_FAILURE); \