git.sesse.net Git - bcachefs-tools-debian/blob - bcache.h

   1 /*
   2  * Author: Kent Overstreet <kmo@daterainc.com>
   3  *
   4  * GPLv2
   5  */
   6
   7 #ifndef _BCACHE_H
   8 #define _BCACHE_H
   9
  10 #include <linux/bcache.h>
  11 #include <dirent.h>
  12
  13 typedef __u8    u8;
  14 typedef __u16   u16;
  15 typedef __u32   u32;
  16 typedef __u64   u64;
  17
  18 typedef __s8    s8;
  19 typedef __s16   s16;
  20 typedef __s32   s32;
  21 typedef __s64   s64;
  22
  23 #define SB_START                (SB_SECTOR * 512)
  24 #define MAX_PATH                256
  25 #define MAX_DEVS                MAX_CACHES_PER_SET
  26
  27 #define max(x, y) ({                            \
  28         typeof(x) _max1 = (x);                  \
  29         typeof(y) _max2 = (y);                  \
  30         (void) (&_max1 == &_max2);              \
  31         _max1 > _max2 ? _max1 : _max2; })
  32
  33 extern const char * const cache_state[];
  34 extern const char * const replacement_policies[];
  35 extern const char * const csum_types[];
  36 extern const char * const bdev_cache_mode[];
  37 extern const char * const bdev_state[];
  38
  39 ssize_t read_string_list(const char *, const char * const[]);
  40 ssize_t read_string_list_or_die(const char *, const char * const[],
  41                                 const char *);
  42 void print_string_list(const char * const[], size_t);
  43
  44 uint64_t bch_checksum(unsigned, const void *, size_t);
  45
  46 uint64_t getblocks(int);
  47 uint64_t hatoi(const char *);
  48 unsigned hatoi_validate(const char *, const char *);
  49 void write_backingdev_sb(int, unsigned, unsigned *,     bool, uint64_t,
  50                                 const char *, uuid_le);
  51 int dev_open(const char *, bool);
  52 void write_cache_sbs(int *, struct cache_sb *, unsigned, unsigned *, int);
  53 void next_cache_device(struct cache_sb *, unsigned, int, unsigned, bool);
  54 unsigned get_blocksize(const char *);
  55 long strtoul_or_die(const char *, size_t, const char *);
  56
  57 void show_super_backingdev(struct cache_sb *, bool);
  58 void show_super_cache(struct cache_sb *, bool);
  59
  60 enum sysfs_attr {SET_ATTR, CACHE_ATTR, INTERNAL_ATTR};
  61
  62 static const char *set_attrs[] = {
  63         "btree_flush_delay",
  64         "btree_scan_ratelimit",
  65         "bucket_reserve_percent",
  66         "cache_reserve_percent",
  67         "checksum_type",
  68         "congested_read_threshold_us",
  69         "congested_write_threshold_us",
  70         "data_replicas",
  71         "errors",
  72         "foreground_target_percent",
  73         "gc_sector_percent",
  74         "journal_delay_ms",
  75         "meta_replicas",
  76         "sector_reserve_percent",
  77         "tiering_percent",
  78         NULL
  79 };
  80
  81 static const char *cache_attrs[] = {
  82         "cache_replacement_policy",
  83         "discard",
  84         "state",
  85         "tier",
  86         NULL
  87 };
  88
  89 static const char *internal_attrs[] = {
  90         "btree_shrinker_disabled",
  91         "copy_gc_enabled",
  92         "foreground_write_rate",
  93         "tiering_enabled",
  94         "tiering_rate",
  95         NULL
  96 };
  97
  98 enum sysfs_attr sysfs_attr_type(char *attr);
  99 void sysfs_attr_list();
 100
 101 struct cache_sb *query_dev(char *, bool, bool, bool, char *dev_uuid);
 102 char *list_cachesets(char *, bool);
 103 char *parse_array_to_list(char *const *);
 104 char *register_bcache(char *const *);
 105 char *unregister_bcache(char *const *);
 106 char *probe(char *, int);
 107 char *read_stat_dir(DIR *, char *, char *, char *);
 108 char *find_matching_uuid(char *, char *, const char*);
 109 char *add_devices(char *const *, char *);
 110 char *remove_device(const char *, bool);
 111 char *bcache_get_capacity(const char *, const char *, bool);
 112
 113 #define csum_set(i, type)                                               \
 114 ({                                                                      \
 115         void *start = ((void *) (i)) + sizeof(uint64_t);                \
 116         void *end = bset_bkey_last(i);                                  \
 117                                                                         \
 118         bch_checksum(type, start, end - start);                         \
 119 })
 120
 121 #endif