mirror of
https://github.com/koverstreet/bcachefs-tools.git
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101 lines
2.8 KiB
C
101 lines
2.8 KiB
C
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#ifndef _BCACHE_OPTS_H
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#define _BCACHE_OPTS_H
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#include <linux/bcache.h>
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#include <linux/bug.h>
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#include <linux/log2.h>
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#include <linux/string.h>
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/*
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* Mount options; we also store defaults in the superblock.
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*
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* Also exposed via sysfs: if an option is writeable, and it's also stored in
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* the superblock, changing it via sysfs (currently? might change this) also
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* updates the superblock.
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*
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* We store options as signed integers, where -1 means undefined. This means we
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* can pass the mount options to cache_set_alloc() as a whole struct, and then
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* only apply the options from that struct that are defined.
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*/
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extern const char * const bch_bool_opt[];
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extern const char * const bch_uint_opt[];
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extern const char * const bch_error_actions[];
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extern const char * const bch_csum_types[];
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extern const char * const bch_compression_types[];
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extern const char * const bch_str_hash_types[];
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/* dummy option, for options that aren't stored in the superblock */
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LE64_BITMASK(NO_SB_OPT, struct cache_sb, flags, 0, 0);
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#define CACHE_SET_VISIBLE_OPTS() \
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CACHE_SET_OPT(verbose_recovery, \
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bch_bool_opt, 0, 2, \
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NO_SB_OPT, false) \
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CACHE_SET_OPT(posix_acl, \
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bch_bool_opt, 0, 2, \
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NO_SB_OPT, false) \
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CACHE_SET_OPT(journal_flush_disabled, \
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bch_bool_opt, 0, 2, \
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NO_SB_OPT, true) \
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CACHE_SET_OPT(nofsck, \
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bch_bool_opt, 0, 2, \
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NO_SB_OPT, true) \
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CACHE_SET_OPT(fix_errors, \
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bch_bool_opt, 0, 2, \
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NO_SB_OPT, true) \
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CACHE_SET_SB_OPTS()
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#define CACHE_SET_OPTS() \
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CACHE_SET_OPT(read_only, \
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bch_bool_opt, 0, 2, \
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NO_SB_OPT, 0) \
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CACHE_SET_VISIBLE_OPTS()
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struct cache_set_opts {
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#define CACHE_SET_OPT(_name, _choices, _min, _max, _sb_opt, _perm)\
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s8 _name;
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CACHE_SET_OPTS()
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#undef CACHE_SET_OPT
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};
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static inline struct cache_set_opts cache_set_opts_empty(void)
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{
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struct cache_set_opts ret;
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memset(&ret, 255, sizeof(ret));
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return ret;
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}
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/*
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* Initial options from superblock - here we don't want any options undefined,
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* any options the superblock doesn't specify are set to 0:
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*/
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static inline struct cache_set_opts cache_superblock_opts(struct cache_sb *sb)
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{
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return (struct cache_set_opts) {
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#define CACHE_SET_OPT(_name, _choices, _min, _max, _sb_opt, _perm)\
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._name = _sb_opt##_BITS ? _sb_opt(sb) : 0,
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CACHE_SET_OPTS()
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#undef CACHE_SET_OPT
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};
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}
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static inline void cache_set_opts_apply(struct cache_set_opts *dst,
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struct cache_set_opts src)
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{
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#define CACHE_SET_OPT(_name, _choices, _min, _max, _sb_opt, _perm)\
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BUILD_BUG_ON(_max > S8_MAX); \
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if (src._name >= 0) \
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dst->_name = src._name;
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CACHE_SET_OPTS()
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#undef CACHE_SET_OPT
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}
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int bch_parse_options(struct cache_set_opts *, int, char *);
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#endif /* _BCACHE_OPTS_H */
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