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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_OPTS_H
   3 #define _BCACHEFS_OPTS_H
   4
   5 #include <linux/bug.h>
   6 #include <linux/log2.h>
   7 #include <linux/string.h>
   8 #include <linux/sysfs.h>
   9 #include "bcachefs_format.h"
  10
  11 extern const char * const bch2_error_actions[];
  12 extern const char * const bch2_sb_features[];
  13 extern const char * const bch2_sb_compat[];
  14 extern const char * const bch2_btree_ids[];
  15 extern const char * const bch2_csum_types[];
  16 extern const char * const bch2_csum_opts[];
  17 extern const char * const bch2_compression_types[];
  18 extern const char * const bch2_compression_opts[];
  19 extern const char * const bch2_str_hash_types[];
  20 extern const char * const bch2_str_hash_opts[];
  21 extern const char * const bch2_data_types[];
  22 extern const char * const bch2_member_states[];
  23 extern const char * const bch2_jset_entry_types[];
  24 extern const char * const bch2_fs_usage_types[];
  25 extern const char * const bch2_d_types[];
  26
  27 static inline const char *bch2_d_type_str(unsigned d_type)
  28 {
  29         return (d_type < BCH_DT_MAX ? bch2_d_types[d_type] : NULL) ?: "(bad d_type)";
  30 }
  31
  32 /*
  33  * Mount options; we also store defaults in the superblock.
  34  *
  35  * Also exposed via sysfs: if an option is writeable, and it's also stored in
  36  * the superblock, changing it via sysfs (currently? might change this) also
  37  * updates the superblock.
  38  *
  39  * We store options as signed integers, where -1 means undefined. This means we
  40  * can pass the mount options to bch2_fs_alloc() as a whole struct, and then only
  41  * apply the options from that struct that are defined.
  42  */
  43
  44 /* dummy option, for options that aren't stored in the superblock */
  45 u64 BCH2_NO_SB_OPT(const struct bch_sb *);
  46 void SET_BCH2_NO_SB_OPT(struct bch_sb *, u64);
  47
  48 /* When can be set: */
  49 enum opt_flags {
  50         OPT_FS          = (1 << 0),     /* Filesystem option */
  51         OPT_DEVICE      = (1 << 1),     /* Device option */
  52         OPT_INODE       = (1 << 2),     /* Inode option */
  53         OPT_FORMAT      = (1 << 3),     /* May be specified at format time */
  54         OPT_MOUNT       = (1 << 4),     /* May be specified at mount time */
  55         OPT_RUNTIME     = (1 << 5),     /* May be specified at runtime */
  56         OPT_HUMAN_READABLE = (1 << 6),
  57         OPT_MUST_BE_POW_2 = (1 << 7),   /* Must be power of 2 */
  58         OPT_SB_FIELD_SECTORS = (1 << 8),/* Superblock field is >> 9 of actual value */
  59         OPT_SB_FIELD_ILOG2 = (1 << 9),  /* Superblock field is ilog2 of actual value */
  60 };
  61
  62 enum opt_type {
  63         BCH_OPT_BOOL,
  64         BCH_OPT_UINT,
  65         BCH_OPT_STR,
  66         BCH_OPT_FN,
  67 };
  68
  69 /**
  70  * x(name, shortopt, type, in mem type, mode, sb_opt)
  71  *
  72  * @name        - name of mount option, sysfs attribute, and struct bch_opts
  73  *                member
  74  *
  75  * @mode        - when opt may be set
  76  *
  77  * @sb_option   - name of corresponding superblock option
  78  *
  79  * @type        - one of OPT_BOOL, OPT_UINT, OPT_STR
  80  */
  81
  82 /*
  83  * XXX: add fields for
  84  *  - default value
  85  *  - helptext
  86  */
  87
  88 #ifdef __KERNEL__
  89 #define RATELIMIT_ERRORS_DEFAULT true
  90 #else
  91 #define RATELIMIT_ERRORS_DEFAULT false
  92 #endif
  93
  94 #define BCH_OPTS()                                                      \
  95         x(block_size,                   u16,                            \
  96           OPT_FS|OPT_FORMAT|                                            \
  97           OPT_HUMAN_READABLE|OPT_MUST_BE_POW_2|OPT_SB_FIELD_SECTORS,    \
  98           OPT_UINT(512, 1U << 16),                                      \
  99           BCH_SB_BLOCK_SIZE,            8,                              \
 100           "size",       NULL)                                           \
 101         x(btree_node_size,              u32,                            \
 102           OPT_FS|OPT_FORMAT|                                            \
 103           OPT_HUMAN_READABLE|OPT_MUST_BE_POW_2|OPT_SB_FIELD_SECTORS,    \
 104           OPT_UINT(512, 1U << 20),                                      \
 105           BCH_SB_BTREE_NODE_SIZE,       512,                            \
 106           "size",       "Btree node size, default 256k")                \
 107         x(errors,                       u8,                             \
 108           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,                      \
 109           OPT_STR(bch2_error_actions),                                  \
 110           BCH_SB_ERROR_ACTION,          BCH_ON_ERROR_ro,                \
 111           NULL,         "Action to take on filesystem error")           \
 112         x(metadata_replicas,            u8,                             \
 113           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,                      \
 114           OPT_UINT(1, BCH_REPLICAS_MAX),                                \
 115           BCH_SB_META_REPLICAS_WANT,    1,                              \
 116           "#",          "Number of metadata replicas")                  \
 117         x(data_replicas,                u8,                             \
 118           OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,            \
 119           OPT_UINT(1, BCH_REPLICAS_MAX),                                \
 120           BCH_SB_DATA_REPLICAS_WANT,    1,                              \
 121           "#",          "Number of data replicas")                      \
 122         x(metadata_replicas_required, u8,                               \
 123           OPT_FS|OPT_FORMAT|OPT_MOUNT,                                  \
 124           OPT_UINT(1, BCH_REPLICAS_MAX),                                \
 125           BCH_SB_META_REPLICAS_REQ,     1,                              \
 126           "#",          NULL)                                           \
 127         x(data_replicas_required,       u8,                             \
 128           OPT_FS|OPT_FORMAT|OPT_MOUNT,                                  \
 129           OPT_UINT(1, BCH_REPLICAS_MAX),                                \
 130           BCH_SB_DATA_REPLICAS_REQ,     1,                              \
 131           "#",          NULL)                                           \
 132         x(encoded_extent_max,           u32,                            \
 133           OPT_FS|OPT_FORMAT|                                            \
 134           OPT_HUMAN_READABLE|OPT_MUST_BE_POW_2|OPT_SB_FIELD_SECTORS|OPT_SB_FIELD_ILOG2,\
 135           OPT_UINT(4096, 2U << 20),                                     \
 136           BCH_SB_ENCODED_EXTENT_MAX_BITS, 64 << 10,                     \
 137           "size",       "Maximum size of checksummed/compressed extents")\
 138         x(metadata_checksum,            u8,                             \
 139           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,                      \
 140           OPT_STR(bch2_csum_opts),                                      \
 141           BCH_SB_META_CSUM_TYPE,        BCH_CSUM_OPT_crc32c,            \
 142           NULL,         NULL)                                           \
 143         x(data_checksum,                u8,                             \
 144           OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,            \
 145           OPT_STR(bch2_csum_opts),                                      \
 146           BCH_SB_DATA_CSUM_TYPE,        BCH_CSUM_OPT_crc32c,            \
 147           NULL,         NULL)                                           \
 148         x(compression,                  u8,                             \
 149           OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,            \
 150           OPT_STR(bch2_compression_opts),                               \
 151           BCH_SB_COMPRESSION_TYPE,      BCH_COMPRESSION_OPT_none,       \
 152           NULL,         NULL)                                           \
 153         x(background_compression,       u8,                             \
 154           OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,            \
 155           OPT_STR(bch2_compression_opts),                               \
 156           BCH_SB_BACKGROUND_COMPRESSION_TYPE,BCH_COMPRESSION_OPT_none,  \
 157           NULL,         NULL)                                           \
 158         x(str_hash,                     u8,                             \
 159           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,                      \
 160           OPT_STR(bch2_str_hash_opts),                                  \
 161           BCH_SB_STR_HASH_TYPE,         BCH_STR_HASH_OPT_siphash,       \
 162           NULL,         "Hash function for directory entries and xattrs")\
 163         x(metadata_target,              u16,                            \
 164           OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,            \
 165           OPT_FN(bch2_opt_target),                                      \
 166           BCH_SB_METADATA_TARGET,       0,                              \
 167           "(target)",   "Device or disk group for metadata writes")     \
 168         x(foreground_target,            u16,                            \
 169           OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,            \
 170           OPT_FN(bch2_opt_target),                                      \
 171           BCH_SB_FOREGROUND_TARGET,     0,                              \
 172           "(target)",   "Device or disk group for foreground writes")   \
 173         x(background_target,            u16,                            \
 174           OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,            \
 175           OPT_FN(bch2_opt_target),                                      \
 176           BCH_SB_BACKGROUND_TARGET,     0,                              \
 177           "(target)",   "Device or disk group to move data to in the background")\
 178         x(promote_target,               u16,                            \
 179           OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,            \
 180           OPT_FN(bch2_opt_target),                                      \
 181           BCH_SB_PROMOTE_TARGET,        0,                              \
 182           "(target)",   "Device or disk group to promote data to on read")\
 183         x(erasure_code,                 u16,                            \
 184           OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,            \
 185           OPT_BOOL(),                                                   \
 186           BCH_SB_ERASURE_CODE,          false,                          \
 187           NULL,         "Enable erasure coding (DO NOT USE YET)")       \
 188         x(inodes_32bit,                 u8,                             \
 189           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,                      \
 190           OPT_BOOL(),                                                   \
 191           BCH_SB_INODE_32BIT,           true,                           \
 192           NULL,         "Constrain inode numbers to 32 bits")           \
 193         x(shard_inode_numbers,          u8,                             \
 194           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,                      \
 195           OPT_BOOL(),                                                   \
 196           BCH_SB_SHARD_INUMS,           true,                           \
 197           NULL,         "Shard new inode numbers by CPU id")            \
 198         x(inodes_use_key_cache, u8,                                     \
 199           OPT_FS|OPT_FORMAT|OPT_MOUNT,                                  \
 200           OPT_BOOL(),                                                   \
 201           BCH_SB_INODES_USE_KEY_CACHE,  true,                           \
 202           NULL,         "Use the btree key cache for the inodes btree") \
 203         x(btree_node_mem_ptr_optimization, u8,                          \
 204           OPT_FS|OPT_MOUNT|OPT_RUNTIME,                                 \
 205           OPT_BOOL(),                                                   \
 206           BCH2_NO_SB_OPT,               true,                           \
 207           NULL,         "Stash pointer to in memory btree node in btree ptr")\
 208         x(gc_reserve_percent,           u8,                             \
 209           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,                      \
 210           OPT_UINT(5, 21),                                              \
 211           BCH_SB_GC_RESERVE,            8,                              \
 212           "%",          "Percentage of disk space to reserve for copygc")\
 213         x(gc_reserve_bytes,             u64,                            \
 214           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME|                      \
 215           OPT_HUMAN_READABLE|OPT_SB_FIELD_SECTORS,                      \
 216           OPT_UINT(0, U64_MAX),                                         \
 217           BCH_SB_GC_RESERVE_BYTES,      0,                              \
 218           "%",          "Amount of disk space to reserve for copygc\n"  \
 219                         "Takes precedence over gc_reserve_percent if set")\
 220         x(root_reserve_percent,         u8,                             \
 221           OPT_FS|OPT_FORMAT|OPT_MOUNT,                                  \
 222           OPT_UINT(0, 100),                                             \
 223           BCH_SB_ROOT_RESERVE,          0,                              \
 224           "%",          "Percentage of disk space to reserve for superuser")\
 225         x(wide_macs,                    u8,                             \
 226           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,                      \
 227           OPT_BOOL(),                                                   \
 228           BCH_SB_128_BIT_MACS,          false,                          \
 229           NULL,         "Store full 128 bits of cryptographic MACs, instead of 80")\
 230         x(inline_data,                  u8,                             \
 231           OPT_FS|OPT_MOUNT|OPT_RUNTIME,                                 \
 232           OPT_BOOL(),                                                   \
 233           BCH2_NO_SB_OPT,               true,                           \
 234           NULL,         "Enable inline data extents")                   \
 235         x(acl,                          u8,                             \
 236           OPT_FS|OPT_FORMAT|OPT_MOUNT,                                  \
 237           OPT_BOOL(),                                                   \
 238           BCH_SB_POSIX_ACL,             true,                           \
 239           NULL,         "Enable POSIX acls")                            \
 240         x(usrquota,                     u8,                             \
 241           OPT_FS|OPT_FORMAT|OPT_MOUNT,                                  \
 242           OPT_BOOL(),                                                   \
 243           BCH_SB_USRQUOTA,              false,                          \
 244           NULL,         "Enable user quotas")                           \
 245         x(grpquota,                     u8,                             \
 246           OPT_FS|OPT_FORMAT|OPT_MOUNT,                                  \
 247           OPT_BOOL(),                                                   \
 248           BCH_SB_GRPQUOTA,              false,                          \
 249           NULL,         "Enable group quotas")                          \
 250         x(prjquota,                     u8,                             \
 251           OPT_FS|OPT_FORMAT|OPT_MOUNT,                                  \
 252           OPT_BOOL(),                                                   \
 253           BCH_SB_PRJQUOTA,              false,                          \
 254           NULL,         "Enable project quotas")                        \
 255         x(degraded,                     u8,                             \
 256           OPT_FS|OPT_MOUNT,                                             \
 257           OPT_BOOL(),                                                   \
 258           BCH2_NO_SB_OPT,               false,                          \
 259           NULL,         "Allow mounting in degraded mode")              \
 260         x(very_degraded,                u8,                             \
 261           OPT_FS|OPT_MOUNT,                                             \
 262           OPT_BOOL(),                                                   \
 263           BCH2_NO_SB_OPT,               false,                          \
 264           NULL,         "Allow mounting in when data will be missing")  \
 265         x(discard,                      u8,                             \
 266           OPT_FS|OPT_MOUNT|OPT_DEVICE,                                  \
 267           OPT_BOOL(),                                                   \
 268           BCH2_NO_SB_OPT,               true,                           \
 269           NULL,         "Enable discard/TRIM support")                  \
 270         x(verbose,                      u8,                             \
 271           OPT_FS|OPT_MOUNT,                                             \
 272           OPT_BOOL(),                                                   \
 273           BCH2_NO_SB_OPT,               false,                          \
 274           NULL,         "Extra debugging information during mount/recovery")\
 275         x(journal_flush_delay,          u32,                            \
 276           OPT_FS|OPT_MOUNT|OPT_RUNTIME,                                 \
 277           OPT_UINT(0, U32_MAX),                                         \
 278           BCH_SB_JOURNAL_FLUSH_DELAY,   1000,                           \
 279           NULL,         "Delay in milliseconds before automatic journal commits")\
 280         x(journal_flush_disabled,       u8,                             \
 281           OPT_FS|OPT_MOUNT|OPT_RUNTIME,                                 \
 282           OPT_BOOL(),                                                   \
 283           BCH_SB_JOURNAL_FLUSH_DISABLED,false,                          \
 284           NULL,         "Disable journal flush on sync/fsync\n"         \
 285                         "If enabled, writes can be lost, but only since the\n"\
 286                         "last journal write (default 1 second)")        \
 287         x(journal_reclaim_delay,        u32,                            \
 288           OPT_FS|OPT_MOUNT|OPT_RUNTIME,                                 \
 289           OPT_UINT(0, U32_MAX),                                         \
 290           BCH_SB_JOURNAL_RECLAIM_DELAY, 100,                            \
 291           NULL,         "Delay in milliseconds before automatic journal reclaim")\
 292         x(fsck,                         u8,                             \
 293           OPT_FS|OPT_MOUNT,                                             \
 294           OPT_BOOL(),                                                   \
 295           BCH2_NO_SB_OPT,               false,                          \
 296           NULL,         "Run fsck on mount")                            \
 297         x(fix_errors,                   u8,                             \
 298           OPT_FS|OPT_MOUNT,                                             \
 299           OPT_BOOL(),                                                   \
 300           BCH2_NO_SB_OPT,               false,                          \
 301           NULL,         "Fix errors during fsck without asking")        \
 302         x(ratelimit_errors,             u8,                             \
 303           OPT_FS|OPT_MOUNT,                                             \
 304           OPT_BOOL(),                                                   \
 305           BCH2_NO_SB_OPT,               RATELIMIT_ERRORS_DEFAULT,       \
 306           NULL,         "Ratelimit error messages during fsck")         \
 307         x(nochanges,                    u8,                             \
 308           OPT_FS|OPT_MOUNT,                                             \
 309           OPT_BOOL(),                                                   \
 310           BCH2_NO_SB_OPT,               false,                          \
 311           NULL,         "Super read only mode - no writes at all will be issued,\n"\
 312                         "even if we have to replay the journal")        \
 313         x(norecovery,                   u8,                             \
 314           OPT_FS|OPT_MOUNT,                                             \
 315           OPT_BOOL(),                                                   \
 316           BCH2_NO_SB_OPT,                       false,                          \
 317           NULL,         "Don't replay the journal")                     \
 318         x(rebuild_replicas,             u8,                             \
 319           OPT_FS|OPT_MOUNT,                                             \
 320           OPT_BOOL(),                                                   \
 321           BCH2_NO_SB_OPT,                       false,                          \
 322           NULL,         "Rebuild the superblock replicas section")      \
 323         x(keep_journal,                 u8,                             \
 324           0,                                                            \
 325           OPT_BOOL(),                                                   \
 326           BCH2_NO_SB_OPT,                       false,                          \
 327           NULL,         "Don't free journal entries/keys after startup")\
 328         x(read_entire_journal,          u8,                             \
 329           0,                                                            \
 330           OPT_BOOL(),                                                   \
 331           BCH2_NO_SB_OPT,                       false,                          \
 332           NULL,         "Read all journal entries, not just dirty ones")\
 333         x(read_journal_only,            u8,                             \
 334           0,                                                            \
 335           OPT_BOOL(),                                                   \
 336           BCH2_NO_SB_OPT,                       false,                          \
 337           NULL,         "Only read the journal, skip the rest of recovery")\
 338         x(journal_transaction_names,    u8,                             \
 339           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,                      \
 340           OPT_BOOL(),                                                   \
 341           BCH_SB_JOURNAL_TRANSACTION_NAMES, true,                       \
 342           NULL,         "Log transaction function names in journal")    \
 343         x(noexcl,                       u8,                             \
 344           OPT_FS|OPT_MOUNT,                                             \
 345           OPT_BOOL(),                                                   \
 346           BCH2_NO_SB_OPT,                       false,                          \
 347           NULL,         "Don't open device in exclusive mode")          \
 348         x(sb,                           u64,                            \
 349           OPT_MOUNT,                                                    \
 350           OPT_UINT(0, S64_MAX),                                         \
 351           BCH2_NO_SB_OPT,                       BCH_SB_SECTOR,                  \
 352           "offset",     "Sector offset of superblock")                  \
 353         x(read_only,                    u8,                             \
 354           OPT_FS,                                                       \
 355           OPT_BOOL(),                                                   \
 356           BCH2_NO_SB_OPT,                       false,                          \
 357           NULL,         NULL)                                           \
 358         x(nostart,                      u8,                             \
 359           0,                                                            \
 360           OPT_BOOL(),                                                   \
 361           BCH2_NO_SB_OPT,                       false,                          \
 362           NULL,         "Don\'t start filesystem, only open devices")   \
 363         x(reconstruct_alloc,            u8,                             \
 364           OPT_FS|OPT_MOUNT,                                             \
 365           OPT_BOOL(),                                                   \
 366           BCH2_NO_SB_OPT,                       false,                          \
 367           NULL,         "Reconstruct alloc btree")                      \
 368         x(version_upgrade,              u8,                             \
 369           OPT_FS|OPT_MOUNT,                                             \
 370           OPT_BOOL(),                                                   \
 371           BCH2_NO_SB_OPT,                       false,                          \
 372           NULL,         "Set superblock to latest version,\n"           \
 373                         "allowing any new features to be used")         \
 374         x(buckets_nouse,                u8,                             \
 375           0,                                                            \
 376           OPT_BOOL(),                                                   \
 377           BCH2_NO_SB_OPT,                       false,                          \
 378           NULL,         "Allocate the buckets_nouse bitmap")            \
 379         x(project,                      u8,                             \
 380           OPT_INODE,                                                    \
 381           OPT_BOOL(),                                                   \
 382           BCH2_NO_SB_OPT,                       false,                          \
 383           NULL,         NULL)                                           \
 384         x(fs_size,                      u64,                            \
 385           OPT_DEVICE,                                                   \
 386           OPT_UINT(0, S64_MAX),                                         \
 387           BCH2_NO_SB_OPT,               0,                              \
 388           "size",       "Size of filesystem on device")                 \
 389         x(bucket,                       u32,                            \
 390           OPT_DEVICE,                                                   \
 391           OPT_UINT(0, S64_MAX),                                         \
 392           BCH2_NO_SB_OPT,               0,                              \
 393           "size",       "Size of filesystem on device")                 \
 394         x(durability,                   u8,                             \
 395           OPT_DEVICE,                                                   \
 396           OPT_UINT(0, BCH_REPLICAS_MAX),                                \
 397           BCH2_NO_SB_OPT,               1,                              \
 398           "n",          "Data written to this device will be considered\n"\
 399                         "to have already been replicated n times")
 400
 401 struct bch_opts {
 402 #define x(_name, _bits, ...)    unsigned _name##_defined:1;
 403         BCH_OPTS()
 404 #undef x
 405
 406 #define x(_name, _bits, ...)    _bits   _name;
 407         BCH_OPTS()
 408 #undef x
 409 };
 410
 411 static const struct bch_opts bch2_opts_default = {
 412 #define x(_name, _bits, _mode, _type, _sb_opt, _default, ...)           \
 413         ._name##_defined = true,                                        \
 414         ._name = _default,                                              \
 415
 416         BCH_OPTS()
 417 #undef x
 418 };
 419
 420 #define opt_defined(_opts, _name)       ((_opts)._name##_defined)
 421
 422 #define opt_get(_opts, _name)                                           \
 423         (opt_defined(_opts, _name) ? (_opts)._name : bch2_opts_default._name)
 424
 425 #define opt_set(_opts, _name, _v)                                       \
 426 do {                                                                    \
 427         (_opts)._name##_defined = true;                                 \
 428         (_opts)._name = _v;                                             \
 429 } while (0)
 430
 431 static inline struct bch_opts bch2_opts_empty(void)
 432 {
 433         return (struct bch_opts) { 0 };
 434 }
 435
 436 void bch2_opts_apply(struct bch_opts *, struct bch_opts);
 437
 438 enum bch_opt_id {
 439 #define x(_name, ...)   Opt_##_name,
 440         BCH_OPTS()
 441 #undef x
 442         bch2_opts_nr
 443 };
 444
 445 struct bch_fs;
 446 struct printbuf;
 447
 448 struct bch_option {
 449         struct attribute        attr;
 450         u64                     (*get_sb)(const struct bch_sb *);
 451         void                    (*set_sb)(struct bch_sb *, u64);
 452         enum opt_type           type;
 453         enum opt_flags          flags;
 454         u64                     min, max;
 455
 456         union {
 457         struct {
 458         };
 459         struct {
 460                 const char * const *choices;
 461         };
 462         struct {
 463                 int (*parse)(struct bch_fs *, const char *, u64 *);
 464                 void (*to_text)(struct printbuf *, struct bch_fs *, struct bch_sb *, u64);
 465         };
 466         };
 467
 468         const char              *hint;
 469         const char              *help;
 470
 471 };
 472
 473 extern const struct bch_option bch2_opt_table[];
 474
 475 bool bch2_opt_defined_by_id(const struct bch_opts *, enum bch_opt_id);
 476 u64 bch2_opt_get_by_id(const struct bch_opts *, enum bch_opt_id);
 477 void bch2_opt_set_by_id(struct bch_opts *, enum bch_opt_id, u64);
 478
 479 u64 bch2_opt_from_sb(struct bch_sb *, enum bch_opt_id);
 480 int bch2_opts_from_sb(struct bch_opts *, struct bch_sb *);
 481 void __bch2_opt_set_sb(struct bch_sb *, const struct bch_option *, u64);
 482 void bch2_opt_set_sb(struct bch_fs *, const struct bch_option *, u64);
 483
 484 int bch2_opt_lookup(const char *);
 485 int bch2_opt_parse(struct bch_fs *, const char *, const struct bch_option *,
 486                    const char *, u64 *);
 487
 488 #define OPT_SHOW_FULL_LIST      (1 << 0)
 489 #define OPT_SHOW_MOUNT_STYLE    (1 << 1)
 490
 491 void bch2_opt_to_text(struct printbuf *, struct bch_fs *, struct bch_sb *,
 492                       const struct bch_option *, u64, unsigned);
 493
 494 int bch2_opt_check_may_set(struct bch_fs *, int, u64);
 495 int bch2_opts_check_may_set(struct bch_fs *);
 496 int bch2_parse_mount_opts(struct bch_fs *, struct bch_opts *, char *);
 497
 498 /* inode opts: */
 499
 500 struct bch_io_opts {
 501 #define x(_name, _bits) unsigned _name##_defined:1;
 502         BCH_INODE_OPTS()
 503 #undef x
 504
 505 #define x(_name, _bits) u##_bits _name;
 506         BCH_INODE_OPTS()
 507 #undef x
 508 };
 509
 510 struct bch_io_opts bch2_opts_to_inode_opts(struct bch_opts);
 511 struct bch_opts bch2_inode_opts_to_opts(struct bch_io_opts);
 512 void bch2_io_opts_apply(struct bch_io_opts *, struct bch_io_opts);
 513 bool bch2_opt_is_inode_opt(enum bch_opt_id);
 514
 515 #endif /* _BCACHEFS_OPTS_H */