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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>
/*
* 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 cache_set_alloc() as a whole struct, and then
* only apply the options from that struct that are defined.
*/
extern const char * const bch_bool_opt[];
extern const char * const bch_uint_opt[];
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[];
/* dummy option, for options that aren't stored in the superblock */
LE64_BITMASK(NO_SB_OPT, struct cache_sb, flags, 0, 0);
#define CACHE_SET_VISIBLE_OPTS() \
CACHE_SET_OPT(verbose_recovery, \
bch_bool_opt, 0, 2, \
NO_SB_OPT, false) \
CACHE_SET_OPT(posix_acl, \
bch_bool_opt, 0, 2, \
NO_SB_OPT, false) \
CACHE_SET_OPT(journal_flush_disabled, \
bch_bool_opt, 0, 2, \
NO_SB_OPT, true) \
CACHE_SET_OPT(nofsck, \
bch_bool_opt, 0, 2, \
NO_SB_OPT, true) \
CACHE_SET_OPT(fix_errors, \
bch_bool_opt, 0, 2, \
NO_SB_OPT, true) \
CACHE_SET_SB_OPTS()
#define CACHE_SET_OPTS() \
CACHE_SET_OPT(read_only, \
bch_bool_opt, 0, 2, \
NO_SB_OPT, 0) \
CACHE_SET_VISIBLE_OPTS()
struct cache_set_opts {
#define CACHE_SET_OPT(_name, _choices, _min, _max, _sb_opt, _perm)\
s8 _name;
CACHE_SET_OPTS()
#undef CACHE_SET_OPT
};
static inline struct cache_set_opts cache_set_opts_empty(void)
{
struct cache_set_opts ret;
memset(&ret, 255, sizeof(ret));
return ret;
}
/*
* Initial options from superblock - here we don't want any options undefined,
* any options the superblock doesn't specify are set to 0:
*/
static inline struct cache_set_opts cache_superblock_opts(struct cache_sb *sb)
{
return (struct cache_set_opts) {
#define CACHE_SET_OPT(_name, _choices, _min, _max, _sb_opt, _perm)\
._name = _sb_opt##_BITS ? _sb_opt(sb) : 0,
CACHE_SET_OPTS()
#undef CACHE_SET_OPT
};
}
static inline void cache_set_opts_apply(struct cache_set_opts *dst,
struct cache_set_opts src)
{
#define CACHE_SET_OPT(_name, _choices, _min, _max, _sb_opt, _perm)\
BUILD_BUG_ON(_max > S8_MAX); \
if (src._name >= 0) \
dst->_name = src._name;
CACHE_SET_OPTS()
#undef CACHE_SET_OPT
}
int bch_parse_options(struct cache_set_opts *, int, char *);
#endif /* _BCACHE_OPTS_H */
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