Eric Lee / smarc-fsl-linux-kernel

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drivers/md/raid5-log.h 3.87 KB
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81f7e3824   Eric Lee   Initial Release, ... 
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  /* SPDX-License-Identifier: GPL-2.0 */
  #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 quiesce);
  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);
  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,
  				     struct md_rdev *rdev);
  extern bool r5c_big_stripe_cached(struct r5conf *conf, sector_t sect);
  
  extern struct dma_async_tx_descriptor *
  ops_run_partial_parity(struct stripe_head *sh, struct raid5_percpu *percpu,
  		       struct dma_async_tx_descriptor *tx);
  extern int ppl_init_log(struct r5conf *conf);
  extern void ppl_exit_log(struct r5conf *conf);
  extern int ppl_write_stripe(struct r5conf *conf, struct stripe_head *sh);
  extern void ppl_write_stripe_run(struct r5conf *conf);
  extern void ppl_stripe_write_finished(struct stripe_head *sh);
  extern int ppl_modify_log(struct r5conf *conf, struct md_rdev *rdev, bool add);
  
  static inline bool raid5_has_log(struct r5conf *conf)
  {
  	return test_bit(MD_HAS_JOURNAL, &conf->mddev->flags);
  }
  
  static inline bool raid5_has_ppl(struct r5conf *conf)
  {
  	return test_bit(MD_HAS_PPL, &conf->mddev->flags);
  }
  
  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);
  		}
  	} else if (raid5_has_ppl(conf)) {
  		return ppl_write_stripe(conf, 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);
  	else if (raid5_has_ppl(conf))
  		ppl_stripe_write_finished(sh);
  }
  
  static inline void log_write_stripe_run(struct r5conf *conf)
  {
  	if (conf->log)
  		r5l_write_stripe_run(conf->log);
  	else if (raid5_has_ppl(conf))
  		ppl_write_stripe_run(conf);
  }
  
  static inline void log_exit(struct r5conf *conf)
  {
  	if (conf->log)
  		r5l_exit_log(conf);
  	else if (raid5_has_ppl(conf))
  		ppl_exit_log(conf);
  }
  
  static inline int log_init(struct r5conf *conf, struct md_rdev *journal_dev,
  			   bool ppl)
  {
  	if (journal_dev)
  		return r5l_init_log(conf, journal_dev);
  	else if (ppl)
  		return ppl_init_log(conf);
  
  	return 0;
  }
  
  static inline int log_modify(struct r5conf *conf, struct md_rdev *rdev, bool add)
  {
  	if (raid5_has_ppl(conf))
  		return ppl_modify_log(conf, rdev, add);
  
  	return 0;
  }
  
  #endif