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| author | Artur Paszkiewicz <artur.paszkiewicz@intel.com> | 2017-03-09 09:59:58 +0100 |
|---|---|---|
| committer | Shaohua Li <shli@fb.com> | 2017-03-17 00:55:54 +0100 |
| commit | ff875738edd44e3bc892d378deacc50bccc9d70c (patch) | |
| tree | 9c831895576861c9ae3c30fca2702d673b6f4eaf /drivers/md/raid5-log.h | |
| parent | md: superblock changes for PPL (diff) | |
| download | linux-ff875738edd44e3bc892d378deacc50bccc9d70c.tar.xz linux-ff875738edd44e3bc892d378deacc50bccc9d70c.zip | |
raid5: separate header for log functions
Move raid5-cache declarations from raid5.h to raid5-log.h, add inline
wrappers for functions which will be shared with ppl and use them in
raid5 core instead of direct calls to raid5-cache.
Remove unused parameter from r5c_cache_data(), move two duplicated
pr_debug() calls to r5l_init_log().
Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/raid5-log.h')
| -rw-r--r-- | drivers/md/raid5-log.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/drivers/md/raid5-log.h b/drivers/md/raid5-log.h new file mode 100644 index 000000000000..2da4bd3bbd79 --- /dev/null +++ b/drivers/md/raid5-log.h @@ -0,0 +1,81 @@ +#ifndef _RAID5_LOG_H +#define _RAID5_LOG_H + +extern int r5l_init_log(struct r5conf *conf, struct md_rdev *rdev); +extern void r5l_exit_log(struct r5conf *conf); +extern int r5l_write_stripe(struct r5l_log *log, struct stripe_head *head_sh); +extern void r5l_write_stripe_run(struct r5l_log *log); +extern void r5l_flush_stripe_to_raid(struct r5l_log *log); +extern void r5l_stripe_write_finished(struct stripe_head *sh); +extern int r5l_handle_flush_request(struct r5l_log *log, struct bio *bio); +extern void r5l_quiesce(struct r5l_log *log, int state); +extern bool r5l_log_disk_error(struct r5conf *conf); +extern bool r5c_is_writeback(struct r5l_log *log); +extern int +r5c_try_caching_write(struct r5conf *conf, struct stripe_head *sh, + struct stripe_head_state *s, int disks); +extern void +r5c_finish_stripe_write_out(struct r5conf *conf, struct stripe_head *sh, + struct stripe_head_state *s); +extern void r5c_release_extra_page(struct stripe_head *sh); +extern void r5c_use_extra_page(struct stripe_head *sh); +extern void r5l_wake_reclaim(struct r5l_log *log, sector_t space); +extern void r5c_handle_cached_data_endio(struct r5conf *conf, + struct stripe_head *sh, int disks, struct bio_list *return_bi); +extern int r5c_cache_data(struct r5l_log *log, struct stripe_head *sh); +extern void r5c_make_stripe_write_out(struct stripe_head *sh); +extern void r5c_flush_cache(struct r5conf *conf, int num); +extern void r5c_check_stripe_cache_usage(struct r5conf *conf); +extern void r5c_check_cached_full_stripe(struct r5conf *conf); +extern struct md_sysfs_entry r5c_journal_mode; +extern void r5c_update_on_rdev_error(struct mddev *mddev); +extern bool r5c_big_stripe_cached(struct r5conf *conf, sector_t sect); + +static inline int log_stripe(struct stripe_head *sh, struct stripe_head_state *s) +{ + struct r5conf *conf = sh->raid_conf; + + if (conf->log) { + if (!test_bit(STRIPE_R5C_CACHING, &sh->state)) { + /* writing out phase */ + if (s->waiting_extra_page) + return 0; + return r5l_write_stripe(conf->log, sh); + } else if (test_bit(STRIPE_LOG_TRAPPED, &sh->state)) { + /* caching phase */ + return r5c_cache_data(conf->log, sh); + } + } + + return -EAGAIN; +} + +static inline void log_stripe_write_finished(struct stripe_head *sh) +{ + struct r5conf *conf = sh->raid_conf; + + if (conf->log) + r5l_stripe_write_finished(sh); +} + +static inline void log_write_stripe_run(struct r5conf *conf) +{ + if (conf->log) + r5l_write_stripe_run(conf->log); +} + +static inline void log_exit(struct r5conf *conf) +{ + if (conf->log) + r5l_exit_log(conf); +} + +static inline int log_init(struct r5conf *conf, struct md_rdev *journal_dev) +{ + if (journal_dev) + return r5l_init_log(conf, journal_dev); + + return 0; +} + +#endif |