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#ifndef _BCACHE_OPTS_H
#define _BCACHE_OPTS_H
#include <linux/bcache.h>
#include <linux/bug.h>
#include <linux/log2.h>
#include <linux/string.h>
extern const char * const bch_error_actions[];
extern const char * const bch_csum_types[];
extern const char * const bch_compression_types[];
extern const char * const bch_str_hash_types[];
extern const char * const bch_cache_replacement_policies[];
extern const char * const bch_cache_modes[];
extern const char * const bch_dev_state[];
/*
* 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 bch_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 */
LE64_BITMASK(NO_SB_OPT, struct bch_sb, flags[0], 0, 0);
/**
* BCH_OPT(name, mode, sb_opt, type, ...)
*
* @name - name of mount option, sysfs attribute, and struct bch_opts
* member
*
* @mode - sysfs attr permissions
*
* @sb_option - name of corresponding superblock option
*
* @type - one of OPT_BOOL, OPT_UINT, OPT_STR
*/
enum opt_type {
BCH_OPT_BOOL,
BCH_OPT_UINT,
BCH_OPT_STR,
};
#define BCH_VISIBLE_OPTS() \
BCH_OPT(errors, 0644, BCH_SB_ERROR_ACTION, \
s8, OPT_STR(bch_error_actions)) \
BCH_OPT(metadata_replicas, 0444, BCH_SB_META_REPLICAS_WANT,\
s8, OPT_UINT(1, BCH_REPLICAS_MAX)) \
BCH_OPT(data_replicas, 0444, BCH_SB_DATA_REPLICAS_WANT,\
s8, OPT_UINT(1, BCH_REPLICAS_MAX)) \
BCH_OPT(metadata_replicas_required, 0444, BCH_SB_META_REPLICAS_REQ,\
s8, OPT_UINT(1, BCH_REPLICAS_MAX)) \
BCH_OPT(data_replicas_required, 0444, BCH_SB_DATA_REPLICAS_REQ,\
s8, OPT_UINT(1, BCH_REPLICAS_MAX)) \
BCH_OPT(metadata_checksum, 0644, BCH_SB_META_CSUM_TYPE, \
s8, OPT_STR(bch_csum_types)) \
BCH_OPT(data_checksum, 0644, BCH_SB_DATA_CSUM_TYPE, \
s8, OPT_STR(bch_csum_types)) \
BCH_OPT(compression, 0644, BCH_SB_COMPRESSION_TYPE,\
s8, OPT_STR(bch_compression_types)) \
BCH_OPT(str_hash, 0644, BCH_SB_STR_HASH_TYPE, \
s8, OPT_STR(bch_str_hash_types)) \
BCH_OPT(inodes_32bit, 0644, BCH_SB_INODE_32BIT, \
s8, OPT_BOOL()) \
BCH_OPT(gc_reserve_percent, 0444, BCH_SB_GC_RESERVE, \
s8, OPT_UINT(5, 21)) \
BCH_OPT(root_reserve_percent, 0444, BCH_SB_ROOT_RESERVE, \
s8, OPT_UINT(0, 100)) \
BCH_OPT(wide_macs, 0644, BCH_SB_128_BIT_MACS, \
s8, OPT_BOOL()) \
BCH_OPT(verbose_recovery, 0444, NO_SB_OPT, \
s8, OPT_BOOL()) \
BCH_OPT(posix_acl, 0444, NO_SB_OPT, \
s8, OPT_BOOL()) \
BCH_OPT(journal_flush_disabled, 0644, NO_SB_OPT, \
s8, OPT_BOOL()) \
BCH_OPT(nofsck, 0444, NO_SB_OPT, \
s8, OPT_BOOL()) \
BCH_OPT(fix_errors, 0444, NO_SB_OPT, \
s8, OPT_BOOL()) \
BCH_OPT(nochanges, 0444, NO_SB_OPT, \
s8, OPT_BOOL()) \
BCH_OPT(noreplay, 0444, NO_SB_OPT, \
s8, OPT_BOOL()) \
BCH_OPT(norecovery, 0444, NO_SB_OPT, \
s8, OPT_BOOL()) \
BCH_OPT(noexcl, 0444, NO_SB_OPT, \
s8, OPT_BOOL()) \
BCH_OPT(sb, 0444, NO_SB_OPT, \
s64, OPT_UINT(0, S64_MAX)) \
#define BCH_OPTS() \
BCH_OPT(read_only, 0444, NO_SB_OPT, \
s8, OPT_BOOL()) \
BCH_OPT(nostart, 0444, NO_SB_OPT, \
s8, OPT_BOOL()) \
BCH_VISIBLE_OPTS()
struct bch_opts {
#define BCH_OPT(_name, _mode, _sb_opt, _bits, ...) \
_bits _name;
BCH_OPTS()
#undef BCH_OPT
};
enum bch_opt_id {
#define BCH_OPT(_name, ...) \
Opt_##_name,
BCH_VISIBLE_OPTS()
#undef BCH_OPT
};
struct bch_option {
const char *name;
void (*set_sb)(struct bch_sb *, u64);
enum opt_type type;
union {
struct {
u64 min, max;
};
struct {
const char * const *choices;
};
};
};
extern const struct bch_option bch_opt_table[];
static inline struct bch_opts bch_opts_empty(void)
{
struct bch_opts ret;
memset(&ret, 255, sizeof(ret));
return ret;
}
static inline void bch_opts_apply(struct bch_opts *dst, struct bch_opts src)
{
#define BCH_OPT(_name, ...) \
if (src._name >= 0) \
dst->_name = src._name;
BCH_OPTS()
#undef BCH_OPT
}
#define opt_defined(_opt) ((_opt) >= 0)
void bch_opt_set(struct bch_opts *, enum bch_opt_id, u64);
struct bch_opts bch_sb_opts(struct bch_sb *);
int bch_parse_mount_opts(struct bch_opts *, char *);
enum bch_opt_id bch_parse_sysfs_opt(const char *, const char *, u64 *);
ssize_t bch_opt_show(struct bch_opts *, const char *, char *, size_t);
#endif /* _BCACHE_OPTS_H */
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