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

   1 #ifndef _LIBBCACHE_H
   2 #define _LIBBCACHE_H
   3
   4 #include <linux/uuid.h>
   5 #include <stdbool.h>
   6
   7 #include "libbcachefs/bcachefs_format.h"
   8 #include "libbcachefs/bcachefs_ioctl.h"
   9 #include "libbcachefs/opts.h"
  10 #include "libbcachefs/vstructs.h"
  11 #include "tools-util.h"
  12
  13 /* option parsing */
  14
  15 struct bch_opt_strs {
  16 union {
  17         char                    *by_id[bch2_opts_nr];
  18 };
  19 struct {
  20 #define x(_name, ...)   char    *_name;
  21         BCH_OPTS()
  22 #undef x
  23 };
  24 };
  25
  26 struct bch_opt_strs bch2_cmdline_opts_get(int *, char *[], unsigned);
  27 struct bch_opts bch2_parse_opts(struct bch_opt_strs);
  28 void bch2_opts_usage(unsigned);
  29
  30 struct format_opts {
  31         char            *label;
  32         uuid_le         uuid;
  33
  34         unsigned        encoded_extent_max;
  35
  36         bool            encrypted;
  37         char            *passphrase;
  38 };
  39
  40 static inline struct format_opts format_opts_default()
  41 {
  42         return (struct format_opts) {
  43                 .encoded_extent_max     = 128,
  44         };
  45 }
  46
  47 struct dev_opts {
  48         int             fd;
  49         char            *path;
  50         u64             size; /* 512 byte sectors */
  51         unsigned        bucket_size;
  52         const char      *group;
  53         unsigned        data_allowed;
  54         unsigned        durability;
  55         bool            discard;
  56
  57         u64             nbuckets;
  58
  59         u64             sb_offset;
  60         u64             sb_end;
  61 };
  62
  63 static inline struct dev_opts dev_opts_default()
  64 {
  65         return (struct dev_opts) {
  66                 .data_allowed           = ~0U << 2,
  67                 .durability             = 1,
  68         };
  69 }
  70
  71 void bch2_pick_bucket_size(struct bch_opts, struct dev_opts *);
  72 struct bch_sb *bch2_format(struct bch_opt_strs,
  73                            struct bch_opts,
  74                            struct format_opts, struct dev_opts *, size_t);
  75
  76 void bch2_super_write(int, struct bch_sb *);
  77 struct bch_sb *__bch2_super_read(int, u64);
  78
  79 void bch2_sb_print(struct bch_sb *, bool, unsigned, enum units);
  80
  81 /* ioctl interface: */
  82
  83 int bcachectl_open(void);
  84
  85 struct bchfs_handle {
  86         uuid_le uuid;
  87         int     ioctl_fd;
  88         int     sysfs_fd;
  89 };
  90
  91 void bcache_fs_close(struct bchfs_handle);
  92 struct bchfs_handle bcache_fs_open(const char *);
  93 struct bchfs_handle bchu_fs_open_by_dev(const char *, unsigned *);
  94
  95 static inline void bchu_disk_add(struct bchfs_handle fs, char *dev)
  96 {
  97         struct bch_ioctl_disk i = { .dev = (unsigned long) dev, };
  98
  99         xioctl(fs.ioctl_fd, BCH_IOCTL_DISK_ADD, &i);
 100 }
 101
 102 static inline void bchu_disk_remove(struct bchfs_handle fs, unsigned dev_idx,
 103                                     unsigned flags)
 104 {
 105         struct bch_ioctl_disk i = {
 106                 .flags  = flags|BCH_BY_INDEX,
 107                 .dev    = dev_idx,
 108         };
 109
 110         xioctl(fs.ioctl_fd, BCH_IOCTL_DISK_REMOVE, &i);
 111 }
 112
 113 static inline void bchu_disk_online(struct bchfs_handle fs, char *dev)
 114 {
 115         struct bch_ioctl_disk i = { .dev = (unsigned long) dev, };
 116
 117         xioctl(fs.ioctl_fd, BCH_IOCTL_DISK_ONLINE, &i);
 118 }
 119
 120 static inline void bchu_disk_offline(struct bchfs_handle fs, unsigned dev_idx,
 121                                      unsigned flags)
 122 {
 123         struct bch_ioctl_disk i = {
 124                 .flags  = flags|BCH_BY_INDEX,
 125                 .dev    = dev_idx,
 126         };
 127
 128         xioctl(fs.ioctl_fd, BCH_IOCTL_DISK_OFFLINE, &i);
 129 }
 130
 131 static inline void bchu_disk_set_state(struct bchfs_handle fs, unsigned dev,
 132                                        unsigned new_state, unsigned flags)
 133 {
 134         struct bch_ioctl_disk_set_state i = {
 135                 .flags          = flags|BCH_BY_INDEX,
 136                 .new_state      = new_state,
 137                 .dev            = dev,
 138         };
 139
 140         xioctl(fs.ioctl_fd, BCH_IOCTL_DISK_SET_STATE, &i);
 141 }
 142
 143 static inline struct bch_ioctl_usage *bchu_usage(struct bchfs_handle fs)
 144 {
 145         struct bch_ioctl_usage *u = NULL;
 146         unsigned nr_devices = 4;
 147
 148         while (1) {
 149                 u = xrealloc(u, sizeof(*u) + sizeof(u->devs[0]) * nr_devices);
 150                 u->nr_devices = nr_devices;
 151
 152                 if (!ioctl(fs.ioctl_fd, BCH_IOCTL_USAGE, u))
 153                         return u;
 154
 155                 if (errno != ENOSPC)
 156                         die("BCH_IOCTL_USAGE error: %m");
 157                 nr_devices *= 2;
 158         }
 159 }
 160
 161 static inline struct bch_sb *bchu_read_super(struct bchfs_handle fs, unsigned idx)
 162 {
 163         size_t size = 4096;
 164         struct bch_sb *sb = NULL;
 165
 166         while (1) {
 167                 sb = xrealloc(sb, size);
 168                 struct bch_ioctl_read_super i = {
 169                         .size   = size,
 170                         .sb     = (unsigned long) sb,
 171                 };
 172
 173                 if (idx != -1) {
 174                         i.flags |= BCH_READ_DEV|BCH_BY_INDEX;
 175                         i.dev = idx;
 176                 }
 177
 178                 if (!ioctl(fs.ioctl_fd, BCH_IOCTL_READ_SUPER, &i))
 179                         return sb;
 180                 if (errno != ERANGE)
 181                         die("BCH_IOCTL_READ_SUPER error: %m");
 182                 size *= 2;
 183         }
 184 }
 185
 186 static inline unsigned bchu_disk_get_idx(struct bchfs_handle fs, dev_t dev)
 187 {
 188         struct bch_ioctl_disk_get_idx i = { .dev = dev };
 189
 190         return xioctl(fs.ioctl_fd, BCH_IOCTL_DISK_GET_IDX, &i);
 191 }
 192
 193 static inline void bchu_disk_resize(struct bchfs_handle fs,
 194                                     unsigned idx,
 195                                     u64 nbuckets)
 196 {
 197         struct bch_ioctl_disk_resize i = {
 198                 .flags  = BCH_BY_INDEX,
 199                 .dev    = idx,
 200                 .nbuckets = nbuckets,
 201         };
 202
 203         xioctl(fs.ioctl_fd, BCH_IOCTL_DISK_RESIZE, &i);
 204 }
 205
 206 int bchu_data(struct bchfs_handle, struct bch_ioctl_data);
 207
 208 #endif /* _LIBBCACHE_H */