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 11struct bch_fs; 12 13extern const char * const bch2_error_actions[]; 14extern const char * const bch2_fsck_fix_opts[]; 15extern const char * const bch2_version_upgrade_opts[]; 16extern const char * const bch2_sb_features[]; 17extern const char * const bch2_sb_compat[]; 18extern const char * const __bch2_btree_ids[]; 19extern const char * const bch2_csum_opts[]; 20extern const char * const bch2_compression_opts[]; 21extern const char * const bch2_str_hash_types[]; 22extern const char * const bch2_str_hash_opts[]; 23extern const char * const __bch2_data_types[]; 24extern const char * const bch2_member_states[]; 25extern const char * const bch2_d_types[]; 26 27void bch2_prt_jset_entry_type(struct printbuf *, enum bch_jset_entry_type); 28void bch2_prt_fs_usage_type(struct printbuf *, enum bch_fs_usage_type); 29void bch2_prt_data_type(struct printbuf *, enum bch_data_type); 30void bch2_prt_csum_type(struct printbuf *, enum bch_csum_type); 31void bch2_prt_compression_type(struct printbuf *, enum bch_compression_type); 32 33static inline const char *bch2_d_type_str(unsigned d_type) 34{ 35 return (d_type < BCH_DT_MAX ? bch2_d_types[d_type] : NULL) ?: "(bad d_type)"; 36} 37 38/* 39 * Mount options; we also store defaults in the superblock. 40 * 41 * Also exposed via sysfs: if an option is writeable, and it's also stored in 42 * the superblock, changing it via sysfs (currently? might change this) also 43 * updates the superblock. 44 * 45 * We store options as signed integers, where -1 means undefined. This means we 46 * can pass the mount options to bch2_fs_alloc() as a whole struct, and then only 47 * apply the options from that struct that are defined. 48 */ 49 50/* dummy option, for options that aren't stored in the superblock */ 51u64 BCH2_NO_SB_OPT(const struct bch_sb *); 52void SET_BCH2_NO_SB_OPT(struct bch_sb *, u64); 53 54/* When can be set: */ 55enum opt_flags { 56 OPT_FS = (1 << 0), /* Filesystem option */ 57 OPT_DEVICE = (1 << 1), /* Device option */ 58 OPT_INODE = (1 << 2), /* Inode option */ 59 OPT_FORMAT = (1 << 3), /* May be specified at format time */ 60 OPT_MOUNT = (1 << 4), /* May be specified at mount time */ 61 OPT_RUNTIME = (1 << 5), /* May be specified at runtime */ 62 OPT_HUMAN_READABLE = (1 << 6), 63 OPT_MUST_BE_POW_2 = (1 << 7), /* Must be power of 2 */ 64 OPT_SB_FIELD_SECTORS = (1 << 8),/* Superblock field is >> 9 of actual value */ 65 OPT_SB_FIELD_ILOG2 = (1 << 9), /* Superblock field is ilog2 of actual value */ 66}; 67 68enum opt_type { 69 BCH_OPT_BOOL, 70 BCH_OPT_UINT, 71 BCH_OPT_STR, 72 BCH_OPT_FN, 73}; 74 75struct bch_opt_fn { 76 int (*parse)(struct bch_fs *, const char *, u64 *, struct printbuf *); 77 void (*to_text)(struct printbuf *, struct bch_fs *, struct bch_sb *, u64); 78 int (*validate)(u64, struct printbuf *); 79}; 80 81/** 82 * x(name, shortopt, type, in mem type, mode, sb_opt) 83 * 84 * @name - name of mount option, sysfs attribute, and struct bch_opts 85 * member 86 * 87 * @mode - when opt may be set 88 * 89 * @sb_option - name of corresponding superblock option 90 * 91 * @type - one of OPT_BOOL, OPT_UINT, OPT_STR 92 */ 93 94/* 95 * XXX: add fields for 96 * - default value 97 * - helptext 98 */ 99 100#ifdef __KERNEL__ 101#define RATELIMIT_ERRORS_DEFAULT true 102#else 103#define RATELIMIT_ERRORS_DEFAULT false 104#endif 105 106#ifdef CONFIG_BCACHEFS_DEBUG 107#define BCACHEFS_VERBOSE_DEFAULT true 108#else 109#define BCACHEFS_VERBOSE_DEFAULT false 110#endif 111 112#define BCH_FIX_ERRORS_OPTS() \ 113 x(exit, 0) \ 114 x(yes, 1) \ 115 x(no, 2) \ 116 x(ask, 3) 117 118enum fsck_err_opts { 119#define x(t, n) FSCK_FIX_##t, 120 BCH_FIX_ERRORS_OPTS() 121#undef x 122}; 123 124#define BCH_OPTS() \ 125 x(block_size, u16, \ 126 OPT_FS|OPT_FORMAT| \ 127 OPT_HUMAN_READABLE|OPT_MUST_BE_POW_2|OPT_SB_FIELD_SECTORS, \ 128 OPT_UINT(512, 1U << 16), \ 129 BCH_SB_BLOCK_SIZE, 8, \ 130 "size", NULL) \ 131 x(btree_node_size, u32, \ 132 OPT_FS|OPT_FORMAT| \ 133 OPT_HUMAN_READABLE|OPT_MUST_BE_POW_2|OPT_SB_FIELD_SECTORS, \ 134 OPT_UINT(512, 1U << 20), \ 135 BCH_SB_BTREE_NODE_SIZE, 512, \ 136 "size", "Btree node size, default 256k") \ 137 x(errors, u8, \ 138 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 139 OPT_STR(bch2_error_actions), \ 140 BCH_SB_ERROR_ACTION, BCH_ON_ERROR_ro, \ 141 NULL, "Action to take on filesystem error") \ 142 x(metadata_replicas, u8, \ 143 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 144 OPT_UINT(1, BCH_REPLICAS_MAX), \ 145 BCH_SB_META_REPLICAS_WANT, 1, \ 146 "#", "Number of metadata replicas") \ 147 x(data_replicas, u8, \ 148 OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 149 OPT_UINT(1, BCH_REPLICAS_MAX), \ 150 BCH_SB_DATA_REPLICAS_WANT, 1, \ 151 "#", "Number of data replicas") \ 152 x(metadata_replicas_required, u8, \ 153 OPT_FS|OPT_FORMAT|OPT_MOUNT, \ 154 OPT_UINT(1, BCH_REPLICAS_MAX), \ 155 BCH_SB_META_REPLICAS_REQ, 1, \ 156 "#", NULL) \ 157 x(data_replicas_required, u8, \ 158 OPT_FS|OPT_FORMAT|OPT_MOUNT, \ 159 OPT_UINT(1, BCH_REPLICAS_MAX), \ 160 BCH_SB_DATA_REPLICAS_REQ, 1, \ 161 "#", NULL) \ 162 x(encoded_extent_max, u32, \ 163 OPT_FS|OPT_FORMAT| \ 164 OPT_HUMAN_READABLE|OPT_MUST_BE_POW_2|OPT_SB_FIELD_SECTORS|OPT_SB_FIELD_ILOG2,\ 165 OPT_UINT(4096, 2U << 20), \ 166 BCH_SB_ENCODED_EXTENT_MAX_BITS, 64 << 10, \ 167 "size", "Maximum size of checksummed/compressed extents")\ 168 x(metadata_checksum, u8, \ 169 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 170 OPT_STR(bch2_csum_opts), \ 171 BCH_SB_META_CSUM_TYPE, BCH_CSUM_OPT_crc32c, \ 172 NULL, NULL) \ 173 x(data_checksum, u8, \ 174 OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 175 OPT_STR(bch2_csum_opts), \ 176 BCH_SB_DATA_CSUM_TYPE, BCH_CSUM_OPT_crc32c, \ 177 NULL, NULL) \ 178 x(compression, u8, \ 179 OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 180 OPT_FN(bch2_opt_compression), \ 181 BCH_SB_COMPRESSION_TYPE, BCH_COMPRESSION_OPT_none, \ 182 NULL, NULL) \ 183 x(background_compression, u8, \ 184 OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 185 OPT_FN(bch2_opt_compression), \ 186 BCH_SB_BACKGROUND_COMPRESSION_TYPE,BCH_COMPRESSION_OPT_none, \ 187 NULL, NULL) \ 188 x(str_hash, u8, \ 189 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 190 OPT_STR(bch2_str_hash_opts), \ 191 BCH_SB_STR_HASH_TYPE, BCH_STR_HASH_OPT_siphash, \ 192 NULL, "Hash function for directory entries and xattrs")\ 193 x(metadata_target, u16, \ 194 OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 195 OPT_FN(bch2_opt_target), \ 196 BCH_SB_METADATA_TARGET, 0, \ 197 "(target)", "Device or label for metadata writes") \ 198 x(foreground_target, u16, \ 199 OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 200 OPT_FN(bch2_opt_target), \ 201 BCH_SB_FOREGROUND_TARGET, 0, \ 202 "(target)", "Device or label for foreground writes") \ 203 x(background_target, u16, \ 204 OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 205 OPT_FN(bch2_opt_target), \ 206 BCH_SB_BACKGROUND_TARGET, 0, \ 207 "(target)", "Device or label to move data to in the background")\ 208 x(promote_target, u16, \ 209 OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 210 OPT_FN(bch2_opt_target), \ 211 BCH_SB_PROMOTE_TARGET, 0, \ 212 "(target)", "Device or label to promote data to on read") \ 213 x(erasure_code, u16, \ 214 OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 215 OPT_BOOL(), \ 216 BCH_SB_ERASURE_CODE, false, \ 217 NULL, "Enable erasure coding (DO NOT USE YET)") \ 218 x(inodes_32bit, u8, \ 219 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 220 OPT_BOOL(), \ 221 BCH_SB_INODE_32BIT, true, \ 222 NULL, "Constrain inode numbers to 32 bits") \ 223 x(shard_inode_numbers, u8, \ 224 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 225 OPT_BOOL(), \ 226 BCH_SB_SHARD_INUMS, true, \ 227 NULL, "Shard new inode numbers by CPU id") \ 228 x(inodes_use_key_cache, u8, \ 229 OPT_FS|OPT_FORMAT|OPT_MOUNT, \ 230 OPT_BOOL(), \ 231 BCH_SB_INODES_USE_KEY_CACHE, true, \ 232 NULL, "Use the btree key cache for the inodes btree") \ 233 x(btree_node_mem_ptr_optimization, u8, \ 234 OPT_FS|OPT_MOUNT|OPT_RUNTIME, \ 235 OPT_BOOL(), \ 236 BCH2_NO_SB_OPT, true, \ 237 NULL, "Stash pointer to in memory btree node in btree ptr")\ 238 x(gc_reserve_percent, u8, \ 239 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 240 OPT_UINT(5, 21), \ 241 BCH_SB_GC_RESERVE, 8, \ 242 "%", "Percentage of disk space to reserve for copygc")\ 243 x(gc_reserve_bytes, u64, \ 244 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME| \ 245 OPT_HUMAN_READABLE|OPT_SB_FIELD_SECTORS, \ 246 OPT_UINT(0, U64_MAX), \ 247 BCH_SB_GC_RESERVE_BYTES, 0, \ 248 "%", "Amount of disk space to reserve for copygc\n" \ 249 "Takes precedence over gc_reserve_percent if set")\ 250 x(root_reserve_percent, u8, \ 251 OPT_FS|OPT_FORMAT|OPT_MOUNT, \ 252 OPT_UINT(0, 100), \ 253 BCH_SB_ROOT_RESERVE, 0, \ 254 "%", "Percentage of disk space to reserve for superuser")\ 255 x(wide_macs, u8, \ 256 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 257 OPT_BOOL(), \ 258 BCH_SB_128_BIT_MACS, false, \ 259 NULL, "Store full 128 bits of cryptographic MACs, instead of 80")\ 260 x(inline_data, u8, \ 261 OPT_FS|OPT_MOUNT|OPT_RUNTIME, \ 262 OPT_BOOL(), \ 263 BCH2_NO_SB_OPT, true, \ 264 NULL, "Enable inline data extents") \ 265 x(acl, u8, \ 266 OPT_FS|OPT_FORMAT|OPT_MOUNT, \ 267 OPT_BOOL(), \ 268 BCH_SB_POSIX_ACL, true, \ 269 NULL, "Enable POSIX acls") \ 270 x(usrquota, u8, \ 271 OPT_FS|OPT_FORMAT|OPT_MOUNT, \ 272 OPT_BOOL(), \ 273 BCH_SB_USRQUOTA, false, \ 274 NULL, "Enable user quotas") \ 275 x(grpquota, u8, \ 276 OPT_FS|OPT_FORMAT|OPT_MOUNT, \ 277 OPT_BOOL(), \ 278 BCH_SB_GRPQUOTA, false, \ 279 NULL, "Enable group quotas") \ 280 x(prjquota, u8, \ 281 OPT_FS|OPT_FORMAT|OPT_MOUNT, \ 282 OPT_BOOL(), \ 283 BCH_SB_PRJQUOTA, false, \ 284 NULL, "Enable project quotas") \ 285 x(degraded, u8, \ 286 OPT_FS|OPT_MOUNT, \ 287 OPT_BOOL(), \ 288 BCH2_NO_SB_OPT, false, \ 289 NULL, "Allow mounting in degraded mode") \ 290 x(very_degraded, u8, \ 291 OPT_FS|OPT_MOUNT, \ 292 OPT_BOOL(), \ 293 BCH2_NO_SB_OPT, false, \ 294 NULL, "Allow mounting in when data will be missing") \ 295 x(no_splitbrain_check, u8, \ 296 OPT_FS|OPT_MOUNT, \ 297 OPT_BOOL(), \ 298 BCH2_NO_SB_OPT, false, \ 299 NULL, "Don't kick drives out when splitbrain detected")\ 300 x(discard, u8, \ 301 OPT_FS|OPT_MOUNT|OPT_DEVICE, \ 302 OPT_BOOL(), \ 303 BCH2_NO_SB_OPT, true, \ 304 NULL, "Enable discard/TRIM support") \ 305 x(verbose, u8, \ 306 OPT_FS|OPT_MOUNT|OPT_RUNTIME, \ 307 OPT_BOOL(), \ 308 BCH2_NO_SB_OPT, BCACHEFS_VERBOSE_DEFAULT, \ 309 NULL, "Extra debugging information during mount/recovery")\ 310 x(journal_flush_delay, u32, \ 311 OPT_FS|OPT_MOUNT|OPT_RUNTIME, \ 312 OPT_UINT(1, U32_MAX), \ 313 BCH_SB_JOURNAL_FLUSH_DELAY, 1000, \ 314 NULL, "Delay in milliseconds before automatic journal commits")\ 315 x(journal_flush_disabled, u8, \ 316 OPT_FS|OPT_MOUNT|OPT_RUNTIME, \ 317 OPT_BOOL(), \ 318 BCH_SB_JOURNAL_FLUSH_DISABLED,false, \ 319 NULL, "Disable journal flush on sync/fsync\n" \ 320 "If enabled, writes can be lost, but only since the\n"\ 321 "last journal write (default 1 second)") \ 322 x(journal_reclaim_delay, u32, \ 323 OPT_FS|OPT_MOUNT|OPT_RUNTIME, \ 324 OPT_UINT(0, U32_MAX), \ 325 BCH_SB_JOURNAL_RECLAIM_DELAY, 100, \ 326 NULL, "Delay in milliseconds before automatic journal reclaim")\ 327 x(move_bytes_in_flight, u32, \ 328 OPT_HUMAN_READABLE|OPT_FS|OPT_MOUNT|OPT_RUNTIME, \ 329 OPT_UINT(1024, U32_MAX), \ 330 BCH2_NO_SB_OPT, 1U << 20, \ 331 NULL, "Maximum Amount of IO to keep in flight by the move path")\ 332 x(move_ios_in_flight, u32, \ 333 OPT_FS|OPT_MOUNT|OPT_RUNTIME, \ 334 OPT_UINT(1, 1024), \ 335 BCH2_NO_SB_OPT, 32, \ 336 NULL, "Maximum number of IOs to keep in flight by the move path")\ 337 x(fsck, u8, \ 338 OPT_FS|OPT_MOUNT, \ 339 OPT_BOOL(), \ 340 BCH2_NO_SB_OPT, false, \ 341 NULL, "Run fsck on mount") \ 342 x(fsck_memory_usage_percent, u8, \ 343 OPT_FS|OPT_MOUNT, \ 344 OPT_UINT(20, 70), \ 345 BCH2_NO_SB_OPT, 50, \ 346 NULL, "Maximum percentage of system ram fsck is allowed to pin")\ 347 x(fix_errors, u8, \ 348 OPT_FS|OPT_MOUNT, \ 349 OPT_FN(bch2_opt_fix_errors), \ 350 BCH2_NO_SB_OPT, FSCK_FIX_exit, \ 351 NULL, "Fix errors during fsck without asking") \ 352 x(ratelimit_errors, u8, \ 353 OPT_FS|OPT_MOUNT, \ 354 OPT_BOOL(), \ 355 BCH2_NO_SB_OPT, RATELIMIT_ERRORS_DEFAULT, \ 356 NULL, "Ratelimit error messages during fsck") \ 357 x(nochanges, u8, \ 358 OPT_FS|OPT_MOUNT, \ 359 OPT_BOOL(), \ 360 BCH2_NO_SB_OPT, false, \ 361 NULL, "Super read only mode - no writes at all will be issued,\n"\ 362 "even if we have to replay the journal") \ 363 x(norecovery, u8, \ 364 OPT_FS|OPT_MOUNT, \ 365 OPT_BOOL(), \ 366 BCH2_NO_SB_OPT, false, \ 367 NULL, "Exit recovery immediately prior to journal replay")\ 368 x(recovery_pass_last, u8, \ 369 OPT_FS|OPT_MOUNT, \ 370 OPT_STR_NOLIMIT(bch2_recovery_passes), \ 371 BCH2_NO_SB_OPT, 0, \ 372 NULL, "Exit recovery after specified pass") \ 373 x(retain_recovery_info, u8, \ 374 0, \ 375 OPT_BOOL(), \ 376 BCH2_NO_SB_OPT, false, \ 377 NULL, "Don't free journal entries/keys, scanned btree nodes after startup")\ 378 x(read_entire_journal, u8, \ 379 0, \ 380 OPT_BOOL(), \ 381 BCH2_NO_SB_OPT, false, \ 382 NULL, "Read all journal entries, not just dirty ones")\ 383 x(read_journal_only, u8, \ 384 0, \ 385 OPT_BOOL(), \ 386 BCH2_NO_SB_OPT, false, \ 387 NULL, "Only read the journal, skip the rest of recovery")\ 388 x(journal_transaction_names, u8, \ 389 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \ 390 OPT_BOOL(), \ 391 BCH_SB_JOURNAL_TRANSACTION_NAMES, true, \ 392 NULL, "Log transaction function names in journal") \ 393 x(noexcl, u8, \ 394 OPT_FS|OPT_MOUNT, \ 395 OPT_BOOL(), \ 396 BCH2_NO_SB_OPT, false, \ 397 NULL, "Don't open device in exclusive mode") \ 398 x(direct_io, u8, \ 399 OPT_FS|OPT_MOUNT, \ 400 OPT_BOOL(), \ 401 BCH2_NO_SB_OPT, true, \ 402 NULL, "Use O_DIRECT (userspace only)") \ 403 x(sb, u64, \ 404 OPT_MOUNT, \ 405 OPT_UINT(0, S64_MAX), \ 406 BCH2_NO_SB_OPT, BCH_SB_SECTOR, \ 407 "offset", "Sector offset of superblock") \ 408 x(read_only, u8, \ 409 OPT_FS|OPT_MOUNT, \ 410 OPT_BOOL(), \ 411 BCH2_NO_SB_OPT, false, \ 412 NULL, NULL) \ 413 x(nostart, u8, \ 414 0, \ 415 OPT_BOOL(), \ 416 BCH2_NO_SB_OPT, false, \ 417 NULL, "Don\'t start filesystem, only open devices") \ 418 x(reconstruct_alloc, u8, \ 419 OPT_FS|OPT_MOUNT, \ 420 OPT_BOOL(), \ 421 BCH2_NO_SB_OPT, false, \ 422 NULL, "Reconstruct alloc btree") \ 423 x(version_upgrade, u8, \ 424 OPT_FS|OPT_MOUNT, \ 425 OPT_STR(bch2_version_upgrade_opts), \ 426 BCH_SB_VERSION_UPGRADE, BCH_VERSION_UPGRADE_compatible, \ 427 NULL, "Set superblock to latest version,\n" \ 428 "allowing any new features to be used") \ 429 x(buckets_nouse, u8, \ 430 0, \ 431 OPT_BOOL(), \ 432 BCH2_NO_SB_OPT, false, \ 433 NULL, "Allocate the buckets_nouse bitmap") \ 434 x(stdio, u64, \ 435 0, \ 436 OPT_UINT(0, S64_MAX), \ 437 BCH2_NO_SB_OPT, false, \ 438 NULL, "Pointer to a struct stdio_redirect") \ 439 x(project, u8, \ 440 OPT_INODE, \ 441 OPT_BOOL(), \ 442 BCH2_NO_SB_OPT, false, \ 443 NULL, NULL) \ 444 x(nocow, u8, \ 445 OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME|OPT_INODE, \ 446 OPT_BOOL(), \ 447 BCH_SB_NOCOW, false, \ 448 NULL, "Nocow mode: Writes will be done in place when possible.\n"\ 449 "Snapshots and reflink will still caused writes to be COW\n"\ 450 "Implicitly disables data checksumming, compression and encryption")\ 451 x(nocow_enabled, u8, \ 452 OPT_FS|OPT_MOUNT, \ 453 OPT_BOOL(), \ 454 BCH2_NO_SB_OPT, true, \ 455 NULL, "Enable nocow mode: enables runtime locking in\n"\ 456 "data move path needed if nocow will ever be in use\n")\ 457 x(no_data_io, u8, \ 458 OPT_MOUNT, \ 459 OPT_BOOL(), \ 460 BCH2_NO_SB_OPT, false, \ 461 NULL, "Skip submit_bio() for data reads and writes, " \ 462 "for performance testing purposes") \ 463 x(fs_size, u64, \ 464 OPT_DEVICE, \ 465 OPT_UINT(0, S64_MAX), \ 466 BCH2_NO_SB_OPT, 0, \ 467 "size", "Size of filesystem on device") \ 468 x(bucket, u32, \ 469 OPT_DEVICE, \ 470 OPT_UINT(0, S64_MAX), \ 471 BCH2_NO_SB_OPT, 0, \ 472 "size", "Size of filesystem on device") \ 473 x(durability, u8, \ 474 OPT_DEVICE, \ 475 OPT_UINT(0, BCH_REPLICAS_MAX), \ 476 BCH2_NO_SB_OPT, 1, \ 477 "n", "Data written to this device will be considered\n"\ 478 "to have already been replicated n times") \ 479 x(btree_node_prefetch, u8, \ 480 OPT_FS|OPT_MOUNT|OPT_RUNTIME, \ 481 OPT_BOOL(), \ 482 BCH2_NO_SB_OPT, true, \ 483 NULL, "BTREE_ITER_PREFETCH casuse btree nodes to be\n"\ 484 " prefetched sequentially") 485 486struct bch_opts { 487#define x(_name, _bits, ...) unsigned _name##_defined:1; 488 BCH_OPTS() 489#undef x 490 491#define x(_name, _bits, ...) _bits _name; 492 BCH_OPTS() 493#undef x 494}; 495 496static const __maybe_unused struct bch_opts bch2_opts_default = { 497#define x(_name, _bits, _mode, _type, _sb_opt, _default, ...) \ 498 ._name##_defined = true, \ 499 ._name = _default, \ 500 501 BCH_OPTS() 502#undef x 503}; 504 505#define opt_defined(_opts, _name) ((_opts)._name##_defined) 506 507#define opt_get(_opts, _name) \ 508 (opt_defined(_opts, _name) ? (_opts)._name : bch2_opts_default._name) 509 510#define opt_set(_opts, _name, _v) \ 511do { \ 512 (_opts)._name##_defined = true; \ 513 (_opts)._name = _v; \ 514} while (0) 515 516static inline struct bch_opts bch2_opts_empty(void) 517{ 518 return (struct bch_opts) { 0 }; 519} 520 521void bch2_opts_apply(struct bch_opts *, struct bch_opts); 522 523enum bch_opt_id { 524#define x(_name, ...) Opt_##_name, 525 BCH_OPTS() 526#undef x 527 bch2_opts_nr 528}; 529 530struct bch_fs; 531struct printbuf; 532 533struct bch_option { 534 struct attribute attr; 535 u64 (*get_sb)(const struct bch_sb *); 536 void (*set_sb)(struct bch_sb *, u64); 537 enum opt_type type; 538 enum opt_flags flags; 539 u64 min, max; 540 541 const char * const *choices; 542 543 struct bch_opt_fn fn; 544 545 const char *hint; 546 const char *help; 547 548}; 549 550extern const struct bch_option bch2_opt_table[]; 551 552bool bch2_opt_defined_by_id(const struct bch_opts *, enum bch_opt_id); 553u64 bch2_opt_get_by_id(const struct bch_opts *, enum bch_opt_id); 554void bch2_opt_set_by_id(struct bch_opts *, enum bch_opt_id, u64); 555 556u64 bch2_opt_from_sb(struct bch_sb *, enum bch_opt_id); 557int bch2_opts_from_sb(struct bch_opts *, struct bch_sb *); 558void __bch2_opt_set_sb(struct bch_sb *, const struct bch_option *, u64); 559void bch2_opt_set_sb(struct bch_fs *, const struct bch_option *, u64); 560 561int bch2_opt_lookup(const char *); 562int bch2_opt_validate(const struct bch_option *, u64, struct printbuf *); 563int bch2_opt_parse(struct bch_fs *, const struct bch_option *, 564 const char *, u64 *, struct printbuf *); 565 566#define OPT_SHOW_FULL_LIST (1 << 0) 567#define OPT_SHOW_MOUNT_STYLE (1 << 1) 568 569void bch2_opt_to_text(struct printbuf *, struct bch_fs *, struct bch_sb *, 570 const struct bch_option *, u64, unsigned); 571 572int bch2_opt_check_may_set(struct bch_fs *, int, u64); 573int bch2_opts_check_may_set(struct bch_fs *); 574int bch2_parse_mount_opts(struct bch_fs *, struct bch_opts *, char *); 575 576/* inode opts: */ 577 578struct bch_io_opts { 579#define x(_name, _bits) u##_bits _name; 580 BCH_INODE_OPTS() 581#undef x 582}; 583 584static inline unsigned background_compression(struct bch_io_opts opts) 585{ 586 return opts.background_compression ?: opts.compression; 587} 588 589struct bch_io_opts bch2_opts_to_inode_opts(struct bch_opts); 590bool bch2_opt_is_inode_opt(enum bch_opt_id); 591 592#endif /* _BCACHEFS_OPTS_H */ 593