1/* SPDX-License-Identifier: GPL-2.0 */
  2#ifndef _RAID5_LOG_H
  3#define _RAID5_LOG_H
  4
  5int r5l_init_log(struct r5conf *conf, struct md_rdev *rdev);
  6void r5l_exit_log(struct r5conf *conf);
  7int r5l_write_stripe(struct r5l_log *log, struct stripe_head *head_sh);
  8void r5l_write_stripe_run(struct r5l_log *log);
  9void r5l_flush_stripe_to_raid(struct r5l_log *log);
 10void r5l_stripe_write_finished(struct stripe_head *sh);
 11int r5l_handle_flush_request(struct r5l_log *log, struct bio *bio);
 12void r5l_quiesce(struct r5l_log *log, int quiesce);
 13bool r5l_log_disk_error(struct r5conf *conf);
 14bool r5c_is_writeback(struct r5l_log *log);
 15int r5c_try_caching_write(struct r5conf *conf, struct stripe_head *sh,
 16			  struct stripe_head_state *s, int disks);
 17void r5c_finish_stripe_write_out(struct r5conf *conf, struct stripe_head *sh,
 18				 struct stripe_head_state *s);
 19void r5c_release_extra_page(struct stripe_head *sh);
 20void r5c_use_extra_page(struct stripe_head *sh);
 21void r5l_wake_reclaim(struct r5l_log *log, sector_t space);
 22void r5c_handle_cached_data_endio(struct r5conf *conf,
 23				  struct stripe_head *sh, int disks);
 24int r5c_cache_data(struct r5l_log *log, struct stripe_head *sh);
 25void r5c_make_stripe_write_out(struct stripe_head *sh);
 26void r5c_flush_cache(struct r5conf *conf, int num);
 27void r5c_check_stripe_cache_usage(struct r5conf *conf);
 28void r5c_check_cached_full_stripe(struct r5conf *conf);
 29extern struct md_sysfs_entry r5c_journal_mode;
 30void r5c_update_on_rdev_error(struct mddev *mddev, struct md_rdev *rdev);
 31bool r5c_big_stripe_cached(struct r5conf *conf, sector_t sect);
 32int r5l_start(struct r5l_log *log);
 33
 34struct dma_async_tx_descriptor *
 35ops_run_partial_parity(struct stripe_head *sh, struct raid5_percpu *percpu,
 36		       struct dma_async_tx_descriptor *tx);
 37int ppl_init_log(struct r5conf *conf);
 38void ppl_exit_log(struct r5conf *conf);
 39int ppl_write_stripe(struct r5conf *conf, struct stripe_head *sh);
 40void ppl_write_stripe_run(struct r5conf *conf);
 41void ppl_stripe_write_finished(struct stripe_head *sh);
 42int ppl_modify_log(struct r5conf *conf, struct md_rdev *rdev, bool add);
 43void ppl_quiesce(struct r5conf *conf, int quiesce);
 44int ppl_handle_flush_request(struct bio *bio);
 45extern struct md_sysfs_entry ppl_write_hint;
 46
 47static inline bool raid5_has_log(struct r5conf *conf)
 48{
 49	return test_bit(MD_HAS_JOURNAL, &conf->mddev->flags);
 50}
 51
 52static inline bool raid5_has_ppl(struct r5conf *conf)
 53{
 54	return test_bit(MD_HAS_PPL, &conf->mddev->flags);
 55}
 56
 57static inline int log_stripe(struct stripe_head *sh, struct stripe_head_state *s)
 58{
 59	struct r5conf *conf = sh->raid_conf;
 60
 61	if (conf->log) {
 62		if (!test_bit(STRIPE_R5C_CACHING, &sh->state)) {
 63			/* writing out phase */
 64			if (s->waiting_extra_page)
 65				return 0;
 66			return r5l_write_stripe(conf->log, sh);
 67		} else if (test_bit(STRIPE_LOG_TRAPPED, &sh->state)) {
 68			/* caching phase */
 69			return r5c_cache_data(conf->log, sh);
 70		}
 71	} else if (raid5_has_ppl(conf)) {
 72		return ppl_write_stripe(conf, sh);
 73	}
 74
 75	return -EAGAIN;
 76}
 77
 78static inline void log_stripe_write_finished(struct stripe_head *sh)
 79{
 80	struct r5conf *conf = sh->raid_conf;
 81
 82	if (conf->log)
 83		r5l_stripe_write_finished(sh);
 84	else if (raid5_has_ppl(conf))
 85		ppl_stripe_write_finished(sh);
 86}
 87
 88static inline void log_write_stripe_run(struct r5conf *conf)
 89{
 90	if (conf->log)
 91		r5l_write_stripe_run(conf->log);
 92	else if (raid5_has_ppl(conf))
 93		ppl_write_stripe_run(conf);
 94}
 95
 96static inline void log_flush_stripe_to_raid(struct r5conf *conf)
 97{
 98	if (conf->log)
 99		r5l_flush_stripe_to_raid(conf->log);
100	else if (raid5_has_ppl(conf))
101		ppl_write_stripe_run(conf);
102}
103
104static inline int log_handle_flush_request(struct r5conf *conf, struct bio *bio)
105{
106	int ret = -ENODEV;
107
108	if (conf->log)
109		ret = r5l_handle_flush_request(conf->log, bio);
110	else if (raid5_has_ppl(conf))
111		ret = ppl_handle_flush_request(bio);
112
113	return ret;
114}
115
116static inline void log_quiesce(struct r5conf *conf, int quiesce)
117{
118	if (conf->log)
119		r5l_quiesce(conf->log, quiesce);
120	else if (raid5_has_ppl(conf))
121		ppl_quiesce(conf, quiesce);
122}
123
124static inline void log_exit(struct r5conf *conf)
125{
126	if (conf->log)
127		r5l_exit_log(conf);
128	else if (raid5_has_ppl(conf))
129		ppl_exit_log(conf);
130}
131
132static inline int log_init(struct r5conf *conf, struct md_rdev *journal_dev,
133			   bool ppl)
134{
135	if (journal_dev)
136		return r5l_init_log(conf, journal_dev);
137	else if (ppl)
138		return ppl_init_log(conf);
139
140	return 0;
141}
142
143static inline int log_modify(struct r5conf *conf, struct md_rdev *rdev, bool add)
144{
145	if (raid5_has_ppl(conf))
146		return ppl_modify_log(conf, rdev, add);
147
148	return 0;
149}
150
151#endif