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4aedeac570
linux/fs/bcachefs/opts.h
Kent Overstreet 4aedeac570 bcachefs: bch2_opt_set_sb() can now set (some) device options 
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-09-09 09:41:47 -04:00

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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_OPTS_H
#define _BCACHEFS_OPTS_H
#include <linux/bug.h>
#include <linux/log2.h>
#include <linux/string.h>
#include <linux/sysfs.h>
#include "bcachefs_format.h"
struct bch_fs;
extern const char * const bch2_error_actions[];
extern const char * const bch2_fsck_fix_opts[];
extern const char * const bch2_version_upgrade_opts[];
extern const char * const bch2_sb_features[];
extern const char * const bch2_sb_compat[];
extern const char * const __bch2_btree_ids[];
extern const char * const bch2_csum_opts[];
extern const char * const bch2_compression_opts[];
extern const char * const bch2_str_hash_types[];
extern const char * const bch2_str_hash_opts[];
extern const char * const __bch2_data_types[];
extern const char * const bch2_member_states[];
extern const char * const bch2_d_types[];
void bch2_prt_jset_entry_type(struct printbuf *, enum bch_jset_entry_type);
void bch2_prt_fs_usage_type(struct printbuf *, enum bch_fs_usage_type);
void bch2_prt_data_type(struct printbuf *, enum bch_data_type);
void bch2_prt_csum_type(struct printbuf *, enum bch_csum_type);
void bch2_prt_compression_type(struct printbuf *, enum bch_compression_type);
static inline const char *bch2_d_type_str(unsigned d_type)
{
return (d_type < BCH_DT_MAX ? bch2_d_types[d_type] : NULL) ?: "(bad d_type)";
}
/*
* Mount options; we also store defaults in the superblock.
*
* Also exposed via sysfs: if an option is writeable, and it's also stored in
* the superblock, changing it via sysfs (currently? might change this) also
* updates the superblock.
*
* We store options as signed integers, where -1 means undefined. This means we
* can pass the mount options to bch2_fs_alloc() as a whole struct, and then only
* apply the options from that struct that are defined.
*/
/* dummy option, for options that aren't stored in the superblock */
u64 BCH2_NO_SB_OPT(const struct bch_sb *);
void SET_BCH2_NO_SB_OPT(struct bch_sb *, u64);
/* When can be set: */
enum opt_flags {
OPT_FS = (1 << 0), /* Filesystem option */
OPT_DEVICE = (1 << 1), /* Device option */
OPT_INODE = (1 << 2), /* Inode option */
OPT_FORMAT = (1 << 3), /* May be specified at format time */
OPT_MOUNT = (1 << 4), /* May be specified at mount time */
OPT_RUNTIME = (1 << 5), /* May be specified at runtime */
OPT_HUMAN_READABLE = (1 << 6),
OPT_MUST_BE_POW_2 = (1 << 7), /* Must be power of 2 */
OPT_SB_FIELD_SECTORS = (1 << 8),/* Superblock field is >> 9 of actual value */
OPT_SB_FIELD_ILOG2 = (1 << 9), /* Superblock field is ilog2 of actual value */
OPT_HIDDEN = (1 << 10),
};
enum opt_type {
BCH_OPT_BOOL,
BCH_OPT_UINT,
BCH_OPT_STR,
BCH_OPT_BITFIELD,
BCH_OPT_FN,
};
struct bch_opt_fn {
int (*parse)(struct bch_fs *, const char *, u64 *, struct printbuf *);
void (*to_text)(struct printbuf *, struct bch_fs *, struct bch_sb *, u64);
int (*validate)(u64, struct printbuf *);
};
/**
* x(name, shortopt, type, in mem type, mode, sb_opt)
*
* @name - name of mount option, sysfs attribute, and struct bch_opts
* member
*
* @mode - when opt may be set
*
* @sb_option - name of corresponding superblock option
*
* @type - one of OPT_BOOL, OPT_UINT, OPT_STR
*/
/*
* XXX: add fields for
* - default value
* - helptext
*/
#ifdef __KERNEL__
#define RATELIMIT_ERRORS_DEFAULT true
#else
#define RATELIMIT_ERRORS_DEFAULT false
#endif
#ifdef CONFIG_BCACHEFS_DEBUG
#define BCACHEFS_VERBOSE_DEFAULT true
#else
#define BCACHEFS_VERBOSE_DEFAULT false
#endif
#define BCH_FIX_ERRORS_OPTS() \
x(exit, 0) \
x(yes, 1) \
x(no, 2) \
x(ask, 3)
enum fsck_err_opts {
#define x(t, n) FSCK_FIX_##t,
BCH_FIX_ERRORS_OPTS()
#undef x
};
#define BCH_OPTS() \
x(block_size, u16, \
OPT_FS|OPT_FORMAT| \
OPT_HUMAN_READABLE|OPT_MUST_BE_POW_2|OPT_SB_FIELD_SECTORS, \
OPT_UINT(512, 1U << 16), \
BCH_SB_BLOCK_SIZE, 8, \
"size", NULL) \
x(btree_node_size, u32, \
OPT_FS|OPT_FORMAT| \
OPT_HUMAN_READABLE|OPT_MUST_BE_POW_2|OPT_SB_FIELD_SECTORS, \
OPT_UINT(512, 1U << 20), \
BCH_SB_BTREE_NODE_SIZE, 512, \
"size", "Btree node size, default 256k") \
x(errors, u8, \
OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \
OPT_STR(bch2_error_actions), \
BCH_SB_ERROR_ACTION, BCH_ON_ERROR_fix_safe, \
NULL, "Action to take on filesystem error") \
x(metadata_replicas, u8, \
OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \
OPT_UINT(1, BCH_REPLICAS_MAX), \
BCH_SB_META_REPLICAS_WANT, 1, \
"#", "Number of metadata replicas") \
x(data_replicas, u8, \
OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \
OPT_UINT(1, BCH_REPLICAS_MAX), \
BCH_SB_DATA_REPLICAS_WANT, 1, \
"#", "Number of data replicas") \
x(metadata_replicas_required, u8, \
OPT_FS|OPT_FORMAT|OPT_MOUNT, \
OPT_UINT(1, BCH_REPLICAS_MAX), \
BCH_SB_META_REPLICAS_REQ, 1, \
"#", NULL) \
x(data_replicas_required, u8, \
OPT_FS|OPT_FORMAT|OPT_MOUNT, \
OPT_UINT(1, BCH_REPLICAS_MAX), \
BCH_SB_DATA_REPLICAS_REQ, 1, \
"#", NULL) \
x(encoded_extent_max, u32, \
OPT_FS|OPT_FORMAT| \
OPT_HUMAN_READABLE|OPT_MUST_BE_POW_2|OPT_SB_FIELD_SECTORS|OPT_SB_FIELD_ILOG2,\
OPT_UINT(4096, 2U << 20), \
BCH_SB_ENCODED_EXTENT_MAX_BITS, 64 << 10, \
"size", "Maximum size of checksummed/compressed extents")\
x(metadata_checksum, u8, \
OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \
OPT_STR(bch2_csum_opts), \
BCH_SB_META_CSUM_TYPE, BCH_CSUM_OPT_crc32c, \
NULL, NULL) \
x(data_checksum, u8, \
OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \
OPT_STR(bch2_csum_opts), \
BCH_SB_DATA_CSUM_TYPE, BCH_CSUM_OPT_crc32c, \
NULL, NULL) \
x(compression, u8, \
OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \
OPT_FN(bch2_opt_compression), \
BCH_SB_COMPRESSION_TYPE, BCH_COMPRESSION_OPT_none, \
NULL, NULL) \
x(background_compression, u8, \
OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \
OPT_FN(bch2_opt_compression), \
BCH_SB_BACKGROUND_COMPRESSION_TYPE,BCH_COMPRESSION_OPT_none, \
NULL, NULL) \
x(str_hash, u8, \
OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \
OPT_STR(bch2_str_hash_opts), \
BCH_SB_STR_HASH_TYPE, BCH_STR_HASH_OPT_siphash, \
NULL, "Hash function for directory entries and xattrs")\
x(metadata_target, u16, \
OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \
OPT_FN(bch2_opt_target), \
BCH_SB_METADATA_TARGET, 0, \
"(target)", "Device or label for metadata writes") \
x(foreground_target, u16, \
OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \
OPT_FN(bch2_opt_target), \
BCH_SB_FOREGROUND_TARGET, 0, \
"(target)", "Device or label for foreground writes") \
x(background_target, u16, \
OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \
OPT_FN(bch2_opt_target), \
BCH_SB_BACKGROUND_TARGET, 0, \
"(target)", "Device or label to move data to in the background")\
x(promote_target, u16, \
OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \
OPT_FN(bch2_opt_target), \
BCH_SB_PROMOTE_TARGET, 0, \
"(target)", "Device or label to promote data to on read") \
x(erasure_code, u16, \
OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \
OPT_BOOL(), \
BCH_SB_ERASURE_CODE, false, \
NULL, "Enable erasure coding (DO NOT USE YET)") \
x(inodes_32bit, u8, \
OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \
OPT_BOOL(), \
BCH_SB_INODE_32BIT, true, \
NULL, "Constrain inode numbers to 32 bits") \
x(shard_inode_numbers, u8, \
OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \
OPT_BOOL(), \
BCH_SB_SHARD_INUMS, true, \
NULL, "Shard new inode numbers by CPU id") \
x(inodes_use_key_cache, u8, \
OPT_FS|OPT_FORMAT|OPT_MOUNT, \
OPT_BOOL(), \
BCH_SB_INODES_USE_KEY_CACHE, true, \
NULL, "Use the btree key cache for the inodes btree") \
x(btree_node_mem_ptr_optimization, u8, \
OPT_FS|OPT_MOUNT|OPT_RUNTIME, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, true, \
NULL, "Stash pointer to in memory btree node in btree ptr")\
x(gc_reserve_percent, u8, \
OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \
OPT_UINT(5, 21), \
BCH_SB_GC_RESERVE, 8, \
"%", "Percentage of disk space to reserve for copygc")\
x(gc_reserve_bytes, u64, \
OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME| \
OPT_HUMAN_READABLE|OPT_SB_FIELD_SECTORS, \
OPT_UINT(0, U64_MAX), \
BCH_SB_GC_RESERVE_BYTES, 0, \
"%", "Amount of disk space to reserve for copygc\n" \
"Takes precedence over gc_reserve_percent if set")\
x(root_reserve_percent, u8, \
OPT_FS|OPT_FORMAT|OPT_MOUNT, \
OPT_UINT(0, 100), \
BCH_SB_ROOT_RESERVE, 0, \
"%", "Percentage of disk space to reserve for superuser")\
x(wide_macs, u8, \
OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \
OPT_BOOL(), \
BCH_SB_128_BIT_MACS, false, \
NULL, "Store full 128 bits of cryptographic MACs, instead of 80")\
x(inline_data, u8, \
OPT_FS|OPT_MOUNT|OPT_RUNTIME, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, true, \
NULL, "Enable inline data extents") \
x(acl, u8, \
OPT_FS|OPT_FORMAT|OPT_MOUNT, \
OPT_BOOL(), \
BCH_SB_POSIX_ACL, true, \
NULL, "Enable POSIX acls") \
x(usrquota, u8, \
OPT_FS|OPT_FORMAT|OPT_MOUNT, \
OPT_BOOL(), \
BCH_SB_USRQUOTA, false, \
NULL, "Enable user quotas") \
x(grpquota, u8, \
OPT_FS|OPT_FORMAT|OPT_MOUNT, \
OPT_BOOL(), \
BCH_SB_GRPQUOTA, false, \
NULL, "Enable group quotas") \
x(prjquota, u8, \
OPT_FS|OPT_FORMAT|OPT_MOUNT, \
OPT_BOOL(), \
BCH_SB_PRJQUOTA, false, \
NULL, "Enable project quotas") \
x(degraded, u8, \
OPT_FS|OPT_MOUNT, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, false, \
NULL, "Allow mounting in degraded mode") \
x(very_degraded, u8, \
OPT_FS|OPT_MOUNT, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, false, \
NULL, "Allow mounting in when data will be missing") \
x(no_splitbrain_check, u8, \
OPT_FS|OPT_MOUNT, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, false, \
NULL, "Don't kick drives out when splitbrain detected")\
x(discard, u8, \
OPT_FS|OPT_MOUNT|OPT_DEVICE, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, true, \
NULL, "Enable discard/TRIM support") \
x(verbose, u8, \
OPT_FS|OPT_MOUNT|OPT_RUNTIME, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, BCACHEFS_VERBOSE_DEFAULT, \
NULL, "Extra debugging information during mount/recovery")\
x(journal_flush_delay, u32, \
OPT_FS|OPT_MOUNT|OPT_RUNTIME, \
OPT_UINT(1, U32_MAX), \
BCH_SB_JOURNAL_FLUSH_DELAY, 1000, \
NULL, "Delay in milliseconds before automatic journal commits")\
x(journal_flush_disabled, u8, \
OPT_FS|OPT_MOUNT|OPT_RUNTIME, \
OPT_BOOL(), \
BCH_SB_JOURNAL_FLUSH_DISABLED,false, \
NULL, "Disable journal flush on sync/fsync\n" \
"If enabled, writes can be lost, but only since the\n"\
"last journal write (default 1 second)") \
x(journal_reclaim_delay, u32, \
OPT_FS|OPT_MOUNT|OPT_RUNTIME, \
OPT_UINT(0, U32_MAX), \
BCH_SB_JOURNAL_RECLAIM_DELAY, 100, \
NULL, "Delay in milliseconds before automatic journal reclaim")\
x(move_bytes_in_flight, u32, \
OPT_HUMAN_READABLE|OPT_FS|OPT_MOUNT|OPT_RUNTIME, \
OPT_UINT(1024, U32_MAX), \
BCH2_NO_SB_OPT, 1U << 20, \
NULL, "Maximum Amount of IO to keep in flight by the move path")\
x(move_ios_in_flight, u32, \
OPT_FS|OPT_MOUNT|OPT_RUNTIME, \
OPT_UINT(1, 1024), \
BCH2_NO_SB_OPT, 32, \
NULL, "Maximum number of IOs to keep in flight by the move path")\
x(fsck, u8, \
OPT_FS|OPT_MOUNT, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, false, \
NULL, "Run fsck on mount") \
x(fsck_memory_usage_percent, u8, \
OPT_FS|OPT_MOUNT, \
OPT_UINT(20, 70), \
BCH2_NO_SB_OPT, 50, \
NULL, "Maximum percentage of system ram fsck is allowed to pin")\
x(fix_errors, u8, \
OPT_FS|OPT_MOUNT, \
OPT_FN(bch2_opt_fix_errors), \
BCH2_NO_SB_OPT, FSCK_FIX_exit, \
NULL, "Fix errors during fsck without asking") \
x(ratelimit_errors, u8, \
OPT_FS|OPT_MOUNT, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, RATELIMIT_ERRORS_DEFAULT, \
NULL, "Ratelimit error messages during fsck") \
x(nochanges, u8, \
OPT_FS|OPT_MOUNT, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, false, \
NULL, "Super read only mode - no writes at all will be issued,\n"\
"even if we have to replay the journal") \
x(norecovery, u8, \
OPT_FS|OPT_MOUNT, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, false, \
NULL, "Exit recovery immediately prior to journal replay")\
x(recovery_pass_last, u8, \
OPT_FS|OPT_MOUNT, \
OPT_STR_NOLIMIT(bch2_recovery_passes), \
BCH2_NO_SB_OPT, 0, \
NULL, "Exit recovery after specified pass") \
x(retain_recovery_info, u8, \
0, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, false, \
NULL, "Don't free journal entries/keys, scanned btree nodes after startup")\
x(read_entire_journal, u8, \
0, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, false, \
NULL, "Read all journal entries, not just dirty ones")\
x(read_journal_only, u8, \
0, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, false, \
NULL, "Only read the journal, skip the rest of recovery")\
x(journal_transaction_names, u8, \
OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \
OPT_BOOL(), \
BCH_SB_JOURNAL_TRANSACTION_NAMES, true, \
NULL, "Log transaction function names in journal") \
x(allocator_stuck_timeout, u16, \
OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME, \
OPT_UINT(0, U16_MAX), \
BCH_SB_ALLOCATOR_STUCK_TIMEOUT, 30, \
NULL, "Default timeout in seconds for stuck allocator messages")\
x(noexcl, u8, \
OPT_FS|OPT_MOUNT, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, false, \
NULL, "Don't open device in exclusive mode") \
x(direct_io, u8, \
OPT_FS|OPT_MOUNT, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, true, \
NULL, "Use O_DIRECT (userspace only)") \
x(sb, u64, \
OPT_MOUNT, \
OPT_UINT(0, S64_MAX), \
BCH2_NO_SB_OPT, BCH_SB_SECTOR, \
"offset", "Sector offset of superblock") \
x(read_only, u8, \
OPT_FS|OPT_MOUNT|OPT_HIDDEN, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, false, \
NULL, NULL) \
x(nostart, u8, \
0, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, false, \
NULL, "Don\'t start filesystem, only open devices") \
x(reconstruct_alloc, u8, \
OPT_FS|OPT_MOUNT, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, false, \
NULL, "Reconstruct alloc btree") \
x(version_upgrade, u8, \
OPT_FS|OPT_MOUNT, \
OPT_STR(bch2_version_upgrade_opts), \
BCH_SB_VERSION_UPGRADE, BCH_VERSION_UPGRADE_compatible, \
NULL, "Set superblock to latest version,\n" \
"allowing any new features to be used") \
x(stdio, u64, \
0, \
OPT_UINT(0, S64_MAX), \
BCH2_NO_SB_OPT, false, \
NULL, "Pointer to a struct stdio_redirect") \
x(project, u8, \
OPT_INODE, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, false, \
NULL, NULL) \
x(nocow, u8, \
OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME|OPT_INODE, \
OPT_BOOL(), \
BCH_SB_NOCOW, false, \
NULL, "Nocow mode: Writes will be done in place when possible.\n"\
"Snapshots and reflink will still caused writes to be COW\n"\
"Implicitly disables data checksumming, compression and encryption")\
x(nocow_enabled, u8, \
OPT_FS|OPT_MOUNT, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, true, \
NULL, "Enable nocow mode: enables runtime locking in\n"\
"data move path needed if nocow will ever be in use\n")\
x(no_data_io, u8, \
OPT_MOUNT, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, false, \
NULL, "Skip submit_bio() for data reads and writes, " \
"for performance testing purposes") \
x(fs_size, u64, \
OPT_DEVICE, \
OPT_UINT(0, S64_MAX), \
BCH2_NO_SB_OPT, 0, \
"size", "Size of filesystem on device") \
x(bucket, u32, \
OPT_DEVICE, \
OPT_UINT(0, S64_MAX), \
BCH2_NO_SB_OPT, 0, \
"size", "Size of filesystem on device") \
x(durability, u8, \
OPT_DEVICE, \
OPT_UINT(0, BCH_REPLICAS_MAX), \
BCH2_NO_SB_OPT, 1, \
"n", "Data written to this device will be considered\n"\
"to have already been replicated n times") \
x(data_allowed, u8, \
OPT_DEVICE, \
OPT_BITFIELD(__bch2_data_types), \
BCH2_NO_SB_OPT, BIT(BCH_DATA_journal)|BIT(BCH_DATA_btree)|BIT(BCH_DATA_user),\
"types", "Allowed data types for this device: journal, btree, and/or user")\
x(btree_node_prefetch, u8, \
OPT_FS|OPT_MOUNT|OPT_RUNTIME, \
OPT_BOOL(), \
BCH2_NO_SB_OPT, true, \
NULL, "BTREE_ITER_prefetch casuse btree nodes to be\n"\
" prefetched sequentially")
#define BCH_DEV_OPTS() \
x(discard, BCH_MEMBER_DISCARD) \
x(data_allowed, BCH_MEMBER_DATA_ALLOWED)
struct bch_opts {
#define x(_name, _bits, ...) unsigned _name##_defined:1;
BCH_OPTS()
#undef x
#define x(_name, _bits, ...) _bits _name;
BCH_OPTS()
#undef x
};
struct bch2_opts_parse {
struct bch_opts opts;
/* to save opts that can't be parsed before the FS is opened: */
struct printbuf parse_later;
};
static const __maybe_unused struct bch_opts bch2_opts_default = {
#define x(_name, _bits, _mode, _type, _sb_opt, _default, ...) \
._name##_defined = true, \
._name = _default, \
BCH_OPTS()
#undef x
};
#define opt_defined(_opts, _name) ((_opts)._name##_defined)
#define opt_get(_opts, _name) \
(opt_defined(_opts, _name) ? (_opts)._name : bch2_opts_default._name)
#define opt_set(_opts, _name, _v) \
do { \
(_opts)._name##_defined = true; \
(_opts)._name = _v; \
} while (0)
static inline struct bch_opts bch2_opts_empty(void)
{
return (struct bch_opts) { 0 };
}
void bch2_opts_apply(struct bch_opts *, struct bch_opts);
enum bch_opt_id {
#define x(_name, ...) Opt_##_name,
BCH_OPTS()
#undef x
bch2_opts_nr
};
struct bch_fs;
struct printbuf;
struct bch_option {
struct attribute attr;
u64 (*get_sb)(const struct bch_sb *);
void (*set_sb)(struct bch_sb *, u64);
enum opt_type type;
enum opt_flags flags;
u64 min, max;
const char * const *choices;
struct bch_opt_fn fn;
const char *hint;
const char *help;
};
extern const struct bch_option bch2_opt_table[];
bool bch2_opt_defined_by_id(const struct bch_opts *, enum bch_opt_id);
u64 bch2_opt_get_by_id(const struct bch_opts *, enum bch_opt_id);
void bch2_opt_set_by_id(struct bch_opts *, enum bch_opt_id, u64);
u64 bch2_opt_from_sb(struct bch_sb *, enum bch_opt_id);
int bch2_opts_from_sb(struct bch_opts *, struct bch_sb *);
void __bch2_opt_set_sb(struct bch_sb *, int, const struct bch_option *, u64);
struct bch_dev;
void bch2_opt_set_sb(struct bch_fs *, struct bch_dev *, const struct bch_option *, u64);
int bch2_opt_lookup(const char *);
int bch2_opt_validate(const struct bch_option *, u64, struct printbuf *);
int bch2_opt_parse(struct bch_fs *, const struct bch_option *,
const char *, u64 *, struct printbuf *);
#define OPT_SHOW_FULL_LIST (1 << 0)
#define OPT_SHOW_MOUNT_STYLE (1 << 1)
void bch2_opt_to_text(struct printbuf *, struct bch_fs *, struct bch_sb *,
const struct bch_option *, u64, unsigned);
int bch2_opt_check_may_set(struct bch_fs *, int, u64);
int bch2_opts_check_may_set(struct bch_fs *);
int bch2_parse_one_mount_opt(struct bch_fs *, struct bch_opts *,
struct printbuf *, const char *, const char *);
int bch2_parse_mount_opts(struct bch_fs *, struct bch_opts *, struct printbuf *,
char *);
/* inode opts: */
struct bch_io_opts {
#define x(_name, _bits) u##_bits _name;
BCH_INODE_OPTS()
#undef x
};
static inline unsigned background_compression(struct bch_io_opts opts)
{
return opts.background_compression ?: opts.compression;
}
struct bch_io_opts bch2_opts_to_inode_opts(struct bch_opts);
bool bch2_opt_is_inode_opt(enum bch_opt_id);
#endif /* _BCACHEFS_OPTS_H */
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