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 struct bch_fs; 12 13 extern const char * const bch2_error_actions[]; 14 extern const char * const bch2_fsck_fix_opts[]; 15 extern const char * const bch2_version_upgrade_opts[]; 16 extern const char * const bch2_sb_features[]; 17 extern const char * const bch2_sb_compat[]; 18 extern const char * const __bch2_btree_ids[]; 19 extern const char * const bch2_csum_types[]; 20 extern const char * const bch2_csum_opts[]; 21 extern const char * const __bch2_compression_types[]; 22 extern const char * const bch2_compression_opts[]; 23 extern const char * const bch2_str_hash_types[]; 24 extern const char * const bch2_str_hash_opts[]; 25 extern const char * const __bch2_data_types[]; 26 extern const char * const bch2_member_states[]; 27 extern const char * const bch2_jset_entry_types[]; 28 extern const char * const bch2_fs_usage_types[]; 29 extern const char * const bch2_d_types[]; 30 31 static inline const char *bch2_d_type_str(unsigned d_type) 32 { 33 return (d_type < BCH_DT_MAX ? bch2_d_types[d_type] : NULL) ?: "(bad d_type)"; 34 } 35 36 /* 37 * Mount options; we also store defaults in the superblock. 38 * 39 * Also exposed via sysfs: if an option is writeable, and it's also stored in 40 * the superblock, changing it via sysfs (currently? might change this) also 41 * updates the superblock. 42 * 43 * We store options as signed integers, where -1 means undefined. This means we 44 * can pass the mount options to bch2_fs_alloc() as a whole struct, and then only 45 * apply the options from that struct that are defined. 46 */ 47 48 /* dummy option, for options that aren't stored in the superblock */ 49 u64 BCH2_NO_SB_OPT(const struct bch_sb *); 50 void SET_BCH2_NO_SB_OPT(struct bch_sb *, u64); 51 52 /* When can be set: */ 53 enum opt_flags { 54 OPT_FS = (1 << 0), /* Filesystem option */ 55 OPT_DEVICE = (1 << 1), /* Device option */ 56 OPT_INODE = (1 << 2), /* Inode option */ 57 OPT_FORMAT = (1 << 3), /* May be specified at format time */ 58 OPT_MOUNT = (1 << 4), /* May be specified at mount time */ 59 OPT_RUNTIME = (1 << 5), /* May be specified at runtime */ 60 OPT_HUMAN_READABLE = (1 << 6), 61 OPT_MUST_BE_POW_2 = (1 << 7), /* Must be power of 2 */ 62 OPT_SB_FIELD_SECTORS = (1 << 8),/* Superblock field is >> 9 of actual value */ 63 OPT_SB_FIELD_ILOG2 = (1 << 9), /* Superblock field is ilog2 of actual value */ 64 }; 65 66 enum opt_type { 67 BCH_OPT_BOOL, 68 BCH_OPT_UINT, 69 BCH_OPT_STR, 70 BCH_OPT_FN, 71 }; 72 73 struct bch_opt_fn { 74 int (*parse)(struct bch_fs *, const char *, u64 *, struct printbuf *); 75 void (*to_text)(struct printbuf *, struct bch_fs *, struct bch_sb *, u64); 76 int (*validate)(u64, struct printbuf *); 77 }; 78 79 /** 80 * x(name, shortopt, type, in mem type, mode, sb_opt) 81 * 82 * @name - name of mount option, sysfs attribute, and struct bch_opts 83 * member 84 * 85 * @mode - when opt may be set 86 * 87 * @sb_option - name of corresponding superblock option 88 * 89 * @type - one of OPT_BOOL, OPT_UINT, OPT_STR 90 */ 91 92 /* 93 * XXX: add fields for 94 * - default value 95 * - helptext 96 */ 97 98 #ifdef __KERNEL__ 99 #define RATELIMIT_ERRORS_DEFAULT true 100 #else 101 #define RATELIMIT_ERRORS_DEFAULT false 102 #endif 103 104 #ifdef CONFIG_BCACHEFS_DEBUG 105 #define BCACHEFS_VERBOSE_DEFAULT true 106 #else 107 #define BCACHEFS_VERBOSE_DEFAULT false 108 #endif 109 110 #define BCH_FIX_ERRORS_OPTS() \ 111 x(exit, 0) \ 112 x(yes, 1) \ 113 x(no, 2) \ 114 x(ask, 3) 115 116 enum fsck_err_opts { 117 #define x(t, n) FSCK_FIX_##t, 118 BCH_FIX_ERRORS_OPTS() 119 #undef x 120 }; 121 122 #define BCH_OPTS() \ 123 x(block_size, u16, \ 124 OPT_FS|OPT_FORMAT| \ 125 OPT_HUMAN_READABLE|OPT_MUST_BE_POW_2|OPT_SB_FIELD_SECTORS, \ 126 OPT_UINT(512, 1U << 16), \ 127 BCH_SB_BLOCK_SIZE, 8, \ 128 "size", NULL) \ 129 x(btree_node_size, u32, \ 130 OPT_FS|OPT_FORMAT| \ 131 OPT_HUMAN_READABLE|OPT_MUST_BE_POW_2|OPT_SB_FIELD_SECTORS, \ 132 OPT_UINT(512, 1U << 20), \ 133 BCH_SB_BTREE_NODE_SIZE, 512, \ 134 "size", "Btree node size, default 256k") \ 135 x(errors, u8, \ 136 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 137 OPT_STR(bch2_error_actions), \ 138 BCH_SB_ERROR_ACTION, BCH_ON_ERROR_ro, \ 139 NULL, "Action to take on filesystem error") \ 140 x(metadata_replicas, u8, \ 141 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 142 OPT_UINT(1, BCH_REPLICAS_MAX), \ 143 BCH_SB_META_REPLICAS_WANT, 1, \ 144 "#", "Number of metadata replicas") \ 145 x(data_replicas, u8, \ 146 OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 147 OPT_UINT(1, BCH_REPLICAS_MAX), \ 148 BCH_SB_DATA_REPLICAS_WANT, 1, \ 149 "#", "Number of data replicas") \ 150 x(metadata_replicas_required, u8, \ 151 OPT_FS|OPT_FORMAT|OPT_MOUNT, \ 152 OPT_UINT(1, BCH_REPLICAS_MAX), \ 153 BCH_SB_META_REPLICAS_REQ, 1, \ 154 "#", NULL) \ 155 x(data_replicas_required, u8, \ 156 OPT_FS|OPT_FORMAT|OPT_MOUNT, \ 157 OPT_UINT(1, BCH_REPLICAS_MAX), \ 158 BCH_SB_DATA_REPLICAS_REQ, 1, \ 159 "#", NULL) \ 160 x(encoded_extent_max, u32, \ 161 OPT_FS|OPT_FORMAT| \ 162 OPT_HUMAN_READABLE|OPT_MUST_BE_POW_2|OPT_SB_FIELD_SECTORS|OPT_SB_FIELD_ILOG2,\ 163 OPT_UINT(4096, 2U << 20), \ 164 BCH_SB_ENCODED_EXTENT_MAX_BITS, 64 << 10, \ 165 "size", "Maximum size of checksummed/compressed extents")\ 166 x(metadata_checksum, u8, \ 167 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 168 OPT_STR(bch2_csum_opts), \ 169 BCH_SB_META_CSUM_TYPE, BCH_CSUM_OPT_crc32c, \ 170 NULL, NULL) \ 171 x(data_checksum, u8, \ 172 OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 173 OPT_STR(bch2_csum_opts), \ 174 BCH_SB_DATA_CSUM_TYPE, BCH_CSUM_OPT_crc32c, \ 175 NULL, NULL) \ 176 x(compression, u8, \ 177 OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 178 OPT_FN(bch2_opt_compression), \ 179 BCH_SB_COMPRESSION_TYPE, BCH_COMPRESSION_OPT_none, \ 180 NULL, NULL) \ 181 x(background_compression, u8, \ 182 OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 183 OPT_FN(bch2_opt_compression), \ 184 BCH_SB_BACKGROUND_COMPRESSION_TYPE,BCH_COMPRESSION_OPT_none, \ 185 NULL, NULL) \ 186 x(str_hash, u8, \ 187 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 188 OPT_STR(bch2_str_hash_opts), \ 189 BCH_SB_STR_HASH_TYPE, BCH_STR_HASH_OPT_siphash, \ 190 NULL, "Hash function for directory entries and xattrs")\ 191 x(metadata_target, u16, \ 192 OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 193 OPT_FN(bch2_opt_target), \ 194 BCH_SB_METADATA_TARGET, 0, \ 195 "(target)", "Device or label for metadata writes") \ 196 x(foreground_target, u16, \ 197 OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 198 OPT_FN(bch2_opt_target), \ 199 BCH_SB_FOREGROUND_TARGET, 0, \ 200 "(target)", "Device or label for foreground writes") \ 201 x(background_target, u16, \ 202 OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 203 OPT_FN(bch2_opt_target), \ 204 BCH_SB_BACKGROUND_TARGET, 0, \ 205 "(target)", "Device or label to move data to in the background")\ 206 x(promote_target, u16, \ 207 OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 208 OPT_FN(bch2_opt_target), \ 209 BCH_SB_PROMOTE_TARGET, 0, \ 210 "(target)", "Device or label to promote data to on read") \ 211 x(erasure_code, u16, \ 212 OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 213 OPT_BOOL(), \ 214 BCH_SB_ERASURE_CODE, false, \ 215 NULL, "Enable erasure coding (DO NOT USE YET)") \ 216 x(inodes_32bit, u8, \ 217 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 218 OPT_BOOL(), \ 219 BCH_SB_INODE_32BIT, true, \ 220 NULL, "Constrain inode numbers to 32 bits") \ 221 x(shard_inode_numbers, u8, \ 222 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 223 OPT_BOOL(), \ 224 BCH_SB_SHARD_INUMS, true, \ 225 NULL, "Shard new inode numbers by CPU id") \ 226 x(inodes_use_key_cache, u8, \ 227 OPT_FS|OPT_FORMAT|OPT_MOUNT, \ 228 OPT_BOOL(), \ 229 BCH_SB_INODES_USE_KEY_CACHE, true, \ 230 NULL, "Use the btree key cache for the inodes btree") \ 231 x(btree_node_mem_ptr_optimization, u8, \ 232 OPT_FS|OPT_MOUNT|OPT_RUNTIME, \ 233 OPT_BOOL(), \ 234 BCH2_NO_SB_OPT, true, \ 235 NULL, "Stash pointer to in memory btree node in btree ptr")\ 236 x(gc_reserve_percent, u8, \ 237 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 238 OPT_UINT(5, 21), \ 239 BCH_SB_GC_RESERVE, 8, \ 240 "%", "Percentage of disk space to reserve for copygc")\ 241 x(gc_reserve_bytes, u64, \ 242 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME| \ 243 OPT_HUMAN_READABLE|OPT_SB_FIELD_SECTORS, \ 244 OPT_UINT(0, U64_MAX), \ 245 BCH_SB_GC_RESERVE_BYTES, 0, \ 246 "%", "Amount of disk space to reserve for copygc\n" \ 247 "Takes precedence over gc_reserve_percent if set")\ 248 x(root_reserve_percent, u8, \ 249 OPT_FS|OPT_FORMAT|OPT_MOUNT, \ 250 OPT_UINT(0, 100), \ 251 BCH_SB_ROOT_RESERVE, 0, \ 252 "%", "Percentage of disk space to reserve for superuser")\ 253 x(wide_macs, u8, \ 254 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 255 OPT_BOOL(), \ 256 BCH_SB_128_BIT_MACS, false, \ 257 NULL, "Store full 128 bits of cryptographic MACs, instead of 80")\ 258 x(inline_data, u8, \ 259 OPT_FS|OPT_MOUNT|OPT_RUNTIME, \ 260 OPT_BOOL(), \ 261 BCH2_NO_SB_OPT, true, \ 262 NULL, "Enable inline data extents") \ 263 x(acl, u8, \ 264 OPT_FS|OPT_FORMAT|OPT_MOUNT, \ 265 OPT_BOOL(), \ 266 BCH_SB_POSIX_ACL, true, \ 267 NULL, "Enable POSIX acls") \ 268 x(usrquota, u8, \ 269 OPT_FS|OPT_FORMAT|OPT_MOUNT, \ 270 OPT_BOOL(), \ 271 BCH_SB_USRQUOTA, false, \ 272 NULL, "Enable user quotas") \ 273 x(grpquota, u8, \ 274 OPT_FS|OPT_FORMAT|OPT_MOUNT, \ 275 OPT_BOOL(), \ 276 BCH_SB_GRPQUOTA, false, \ 277 NULL, "Enable group quotas") \ 278 x(prjquota, u8, \ 279 OPT_FS|OPT_FORMAT|OPT_MOUNT, \ 280 OPT_BOOL(), \ 281 BCH_SB_PRJQUOTA, false, \ 282 NULL, "Enable project quotas") \ 283 x(degraded, u8, \ 284 OPT_FS|OPT_MOUNT, \ 285 OPT_BOOL(), \ 286 BCH2_NO_SB_OPT, false, \ 287 NULL, "Allow mounting in degraded mode") \ 288 x(very_degraded, u8, \ 289 OPT_FS|OPT_MOUNT, \ 290 OPT_BOOL(), \ 291 BCH2_NO_SB_OPT, false, \ 292 NULL, "Allow mounting in when data will be missing") \ 293 x(no_splitbrain_check, u8, \ 294 OPT_FS|OPT_MOUNT, \ 295 OPT_BOOL(), \ 296 BCH2_NO_SB_OPT, false, \ 297 NULL, "Don't kick drives out when splitbrain detected")\ 298 x(discard, u8, \ 299 OPT_FS|OPT_MOUNT|OPT_DEVICE, \ 300 OPT_BOOL(), \ 301 BCH2_NO_SB_OPT, true, \ 302 NULL, "Enable discard/TRIM support") \ 303 x(verbose, u8, \ 304 OPT_FS|OPT_MOUNT|OPT_RUNTIME, \ 305 OPT_BOOL(), \ 306 BCH2_NO_SB_OPT, BCACHEFS_VERBOSE_DEFAULT, \ 307 NULL, "Extra debugging information during mount/recovery")\ 308 x(journal_flush_delay, u32, \ 309 OPT_FS|OPT_MOUNT|OPT_RUNTIME, \ 310 OPT_UINT(1, U32_MAX), \ 311 BCH_SB_JOURNAL_FLUSH_DELAY, 1000, \ 312 NULL, "Delay in milliseconds before automatic journal commits")\ 313 x(journal_flush_disabled, u8, \ 314 OPT_FS|OPT_MOUNT|OPT_RUNTIME, \ 315 OPT_BOOL(), \ 316 BCH_SB_JOURNAL_FLUSH_DISABLED,false, \ 317 NULL, "Disable journal flush on sync/fsync\n" \ 318 "If enabled, writes can be lost, but only since the\n"\ 319 "last journal write (default 1 second)") \ 320 x(journal_reclaim_delay, u32, \ 321 OPT_FS|OPT_MOUNT|OPT_RUNTIME, \ 322 OPT_UINT(0, U32_MAX), \ 323 BCH_SB_JOURNAL_RECLAIM_DELAY, 100, \ 324 NULL, "Delay in milliseconds before automatic journal reclaim")\ 325 x(move_bytes_in_flight, u32, \ 326 OPT_HUMAN_READABLE|OPT_FS|OPT_MOUNT|OPT_RUNTIME, \ 327 OPT_UINT(1024, U32_MAX), \ 328 BCH2_NO_SB_OPT, 1U << 20, \ 329 NULL, "Maximum Amount of IO to keep in flight by the move path")\ 330 x(move_ios_in_flight, u32, \ 331 OPT_FS|OPT_MOUNT|OPT_RUNTIME, \ 332 OPT_UINT(1, 1024), \ 333 BCH2_NO_SB_OPT, 32, \ 334 NULL, "Maximum number of IOs to keep in flight by the move path")\ 335 x(fsck, u8, \ 336 OPT_FS|OPT_MOUNT, \ 337 OPT_BOOL(), \ 338 BCH2_NO_SB_OPT, false, \ 339 NULL, "Run fsck on mount") \ 340 x(fsck_memory_usage_percent, u8, \ 341 OPT_FS|OPT_MOUNT, \ 342 OPT_UINT(20, 70), \ 343 BCH2_NO_SB_OPT, 50, \ 344 NULL, "Maximum percentage of system ram fsck is allowed to pin")\ 345 x(fix_errors, u8, \ 346 OPT_FS|OPT_MOUNT, \ 347 OPT_FN(bch2_opt_fix_errors), \ 348 BCH2_NO_SB_OPT, FSCK_FIX_exit, \ 349 NULL, "Fix errors during fsck without asking") \ 350 x(ratelimit_errors, u8, \ 351 OPT_FS|OPT_MOUNT, \ 352 OPT_BOOL(), \ 353 BCH2_NO_SB_OPT, RATELIMIT_ERRORS_DEFAULT, \ 354 NULL, "Ratelimit error messages during fsck") \ 355 x(nochanges, u8, \ 356 OPT_FS|OPT_MOUNT, \ 357 OPT_BOOL(), \ 358 BCH2_NO_SB_OPT, false, \ 359 NULL, "Super read only mode - no writes at all will be issued,\n"\ 360 "even if we have to replay the journal") \ 361 x(norecovery, u8, \ 362 OPT_FS|OPT_MOUNT, \ 363 OPT_BOOL(), \ 364 BCH2_NO_SB_OPT, false, \ 365 NULL, "Don't replay the journal") \ 366 x(keep_journal, u8, \ 367 0, \ 368 OPT_BOOL(), \ 369 BCH2_NO_SB_OPT, false, \ 370 NULL, "Don't free journal entries/keys after startup")\ 371 x(read_entire_journal, u8, \ 372 0, \ 373 OPT_BOOL(), \ 374 BCH2_NO_SB_OPT, false, \ 375 NULL, "Read all journal entries, not just dirty ones")\ 376 x(read_journal_only, u8, \ 377 0, \ 378 OPT_BOOL(), \ 379 BCH2_NO_SB_OPT, false, \ 380 NULL, "Only read the journal, skip the rest of recovery")\ 381 x(journal_transaction_names, u8, \ 382 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 383 OPT_BOOL(), \ 384 BCH_SB_JOURNAL_TRANSACTION_NAMES, true, \ 385 NULL, "Log transaction function names in journal") \ 386 x(noexcl, u8, \ 387 OPT_FS|OPT_MOUNT, \ 388 OPT_BOOL(), \ 389 BCH2_NO_SB_OPT, false, \ 390 NULL, "Don't open device in exclusive mode") \ 391 x(direct_io, u8, \ 392 OPT_FS|OPT_MOUNT, \ 393 OPT_BOOL(), \ 394 BCH2_NO_SB_OPT, true, \ 395 NULL, "Use O_DIRECT (userspace only)") \ 396 x(sb, u64, \ 397 OPT_MOUNT, \ 398 OPT_UINT(0, S64_MAX), \ 399 BCH2_NO_SB_OPT, BCH_SB_SECTOR, \ 400 "offset", "Sector offset of superblock") \ 401 x(read_only, u8, \ 402 OPT_FS|OPT_MOUNT, \ 403 OPT_BOOL(), \ 404 BCH2_NO_SB_OPT, false, \ 405 NULL, NULL) \ 406 x(nostart, u8, \ 407 0, \ 408 OPT_BOOL(), \ 409 BCH2_NO_SB_OPT, false, \ 410 NULL, "Don\'t start filesystem, only open devices") \ 411 x(reconstruct_alloc, u8, \ 412 OPT_FS|OPT_MOUNT, \ 413 OPT_BOOL(), \ 414 BCH2_NO_SB_OPT, false, \ 415 NULL, "Reconstruct alloc btree") \ 416 x(version_upgrade, u8, \ 417 OPT_FS|OPT_MOUNT, \ 418 OPT_STR(bch2_version_upgrade_opts), \ 419 BCH_SB_VERSION_UPGRADE, BCH_VERSION_UPGRADE_compatible, \ 420 NULL, "Set superblock to latest version,\n" \ 421 "allowing any new features to be used") \ 422 x(buckets_nouse, u8, \ 423 0, \ 424 OPT_BOOL(), \ 425 BCH2_NO_SB_OPT, false, \ 426 NULL, "Allocate the buckets_nouse bitmap") \ 427 x(stdio, u64, \ 428 0, \ 429 OPT_UINT(0, S64_MAX), \ 430 BCH2_NO_SB_OPT, false, \ 431 NULL, "Pointer to a struct stdio_redirect") \ 432 x(project, u8, \ 433 OPT_INODE, \ 434 OPT_BOOL(), \ 435 BCH2_NO_SB_OPT, false, \ 436 NULL, NULL) \ 437 x(nocow, u8, \ 438 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME|OPT_INODE, \ 439 OPT_BOOL(), \ 440 BCH_SB_NOCOW, false, \ 441 NULL, "Nocow mode: Writes will be done in place when possible.\n"\ 442 "Snapshots and reflink will still caused writes to be COW\n"\ 443 "Implicitly disables data checksumming, compression and encryption")\ 444 x(nocow_enabled, u8, \ 445 OPT_FS|OPT_MOUNT, \ 446 OPT_BOOL(), \ 447 BCH2_NO_SB_OPT, true, \ 448 NULL, "Enable nocow mode: enables runtime locking in\n"\ 449 "data move path needed if nocow will ever be in use\n")\ 450 x(no_data_io, u8, \ 451 OPT_MOUNT, \ 452 OPT_BOOL(), \ 453 BCH2_NO_SB_OPT, false, \ 454 NULL, "Skip submit_bio() for data reads and writes, " \ 455 "for performance testing purposes") \ 456 x(fs_size, u64, \ 457 OPT_DEVICE, \ 458 OPT_UINT(0, S64_MAX), \ 459 BCH2_NO_SB_OPT, 0, \ 460 "size", "Size of filesystem on device") \ 461 x(bucket, u32, \ 462 OPT_DEVICE, \ 463 OPT_UINT(0, S64_MAX), \ 464 BCH2_NO_SB_OPT, 0, \ 465 "size", "Size of filesystem on device") \ 466 x(durability, u8, \ 467 OPT_DEVICE, \ 468 OPT_UINT(0, BCH_REPLICAS_MAX), \ 469 BCH2_NO_SB_OPT, 1, \ 470 "n", "Data written to this device will be considered\n"\ 471 "to have already been replicated n times") \ 472 x(btree_node_prefetch, u8, \ 473 OPT_FS|OPT_MOUNT|OPT_RUNTIME, \ 474 OPT_BOOL(), \ 475 BCH2_NO_SB_OPT, true, \ 476 NULL, "BTREE_ITER_PREFETCH casuse btree nodes to be\n"\ 477 " prefetched sequentially") 478 479 struct bch_opts { 480 #define x(_name, _bits, ...) unsigned _name##_defined:1; 481 BCH_OPTS() 482 #undef x 483 484 #define x(_name, _bits, ...) _bits _name; 485 BCH_OPTS() 486 #undef x 487 }; 488 489 static const __maybe_unused struct bch_opts bch2_opts_default = { 490 #define x(_name, _bits, _mode, _type, _sb_opt, _default, ...) \ 491 ._name##_defined = true, \ 492 ._name = _default, \ 493 494 BCH_OPTS() 495 #undef x 496 }; 497 498 #define opt_defined(_opts, _name) ((_opts)._name##_defined) 499 500 #define opt_get(_opts, _name) \ 501 (opt_defined(_opts, _name) ? (_opts)._name : bch2_opts_default._name) 502 503 #define opt_set(_opts, _name, _v) \ 504 do { \ 505 (_opts)._name##_defined = true; \ 506 (_opts)._name = _v; \ 507 } while (0) 508 509 static inline struct bch_opts bch2_opts_empty(void) 510 { 511 return (struct bch_opts) { 0 }; 512 } 513 514 void bch2_opts_apply(struct bch_opts *, struct bch_opts); 515 516 enum bch_opt_id { 517 #define x(_name, ...) Opt_##_name, 518 BCH_OPTS() 519 #undef x 520 bch2_opts_nr 521 }; 522 523 struct bch_fs; 524 struct printbuf; 525 526 struct bch_option { 527 struct attribute attr; 528 u64 (*get_sb)(const struct bch_sb *); 529 void (*set_sb)(struct bch_sb *, u64); 530 enum opt_type type; 531 enum opt_flags flags; 532 u64 min, max; 533 534 const char * const *choices; 535 536 struct bch_opt_fn fn; 537 538 const char *hint; 539 const char *help; 540 541 }; 542 543 extern const struct bch_option bch2_opt_table[]; 544 545 bool bch2_opt_defined_by_id(const struct bch_opts *, enum bch_opt_id); 546 u64 bch2_opt_get_by_id(const struct bch_opts *, enum bch_opt_id); 547 void bch2_opt_set_by_id(struct bch_opts *, enum bch_opt_id, u64); 548 549 u64 bch2_opt_from_sb(struct bch_sb *, enum bch_opt_id); 550 int bch2_opts_from_sb(struct bch_opts *, struct bch_sb *); 551 void __bch2_opt_set_sb(struct bch_sb *, const struct bch_option *, u64); 552 void bch2_opt_set_sb(struct bch_fs *, const struct bch_option *, u64); 553 554 int bch2_opt_lookup(const char *); 555 int bch2_opt_validate(const struct bch_option *, u64, struct printbuf *); 556 int bch2_opt_parse(struct bch_fs *, const struct bch_option *, 557 const char *, u64 *, struct printbuf *); 558 559 #define OPT_SHOW_FULL_LIST (1 << 0) 560 #define OPT_SHOW_MOUNT_STYLE (1 << 1) 561 562 void bch2_opt_to_text(struct printbuf *, struct bch_fs *, struct bch_sb *, 563 const struct bch_option *, u64, unsigned); 564 565 int bch2_opt_check_may_set(struct bch_fs *, int, u64); 566 int bch2_opts_check_may_set(struct bch_fs *); 567 int bch2_parse_mount_opts(struct bch_fs *, struct bch_opts *, char *); 568 569 /* inode opts: */ 570 571 struct bch_io_opts { 572 #define x(_name, _bits) u##_bits _name; 573 BCH_INODE_OPTS() 574 #undef x 575 }; 576 577 static inline unsigned background_compression(struct bch_io_opts opts) 578 { 579 return opts.background_compression ?: opts.compression; 580 } 581 582 struct bch_io_opts bch2_opts_to_inode_opts(struct bch_opts); 583 bool bch2_opt_is_inode_opt(enum bch_opt_id); 584 585 #endif /* _BCACHEFS_OPTS_H */ 586