Adding upstream version 6.7.7.upstream/6.7.7

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 564 insertions, 0 deletions

diff --git a/fs/bcachefs/opts.h b/fs/bcachefs/opts.h
new file mode 100644
index 0000000000..8526f17745
--- /dev/null
+++ b/fs/bcachefs/opts.h
@@ -0,0 +1,564 @@
+/* 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_types[];
+extern const char * const bch2_csum_opts[];
+extern const char * const bch2_compression_types[];
+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_jset_entry_types[];
+extern const char * const bch2_fs_usage_types[];
+extern const char * const bch2_d_types[];
+
+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 */
+};
+
+enum opt_type {
+	BCH_OPT_BOOL,
+	BCH_OPT_UINT,
+	BCH_OPT_STR,
+	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_ro,		\
+	  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(btree_write_buffer_size, u32,					\
+	  OPT_FS|OPT_MOUNT,						\
+	  OPT_UINT(16, (1U << 20) - 1),					\
+	  BCH2_NO_SB_OPT,		1U << 13,			\
+	  NULL,		"Number of btree write buffer entries")		\
+	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(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(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,		"Don't replay the journal")			\
+	x(keep_journal,			u8,				\
+	  0,								\
+	  OPT_BOOL(),							\
+	  BCH2_NO_SB_OPT,		false,				\
+	  NULL,		"Don't free journal entries/keys 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(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_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(buckets_nouse,		u8,				\
+	  0,								\
+	  OPT_BOOL(),							\
+	  BCH2_NO_SB_OPT,		false,				\
+	  NULL,		"Allocate the buckets_nouse bitmap")		\
+	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")
+
+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
+};
+
+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 *, const struct bch_option *, u64);
+void bch2_opt_set_sb(struct bch_fs *, 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_mount_opts(struct bch_fs *, struct bch_opts *, char *);
+
+/* inode opts: */
+
+struct bch_io_opts {
+#define x(_name, _bits)	u##_bits _name;
+	BCH_INODE_OPTS()
+#undef x
+};
+
+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 */