1/* SPDX-License-Identifier: GPL-2.0 */
  2#ifndef _RAID5_LOG_H
  3#define _RAID5_LOG_H
  4
  5extern int r5l_init_log(struct r5conf *conf, struct md_rdev *rdev);
  6extern void r5l_exit_log(struct r5conf *conf);
  7extern int r5l_write_stripe(struct r5l_log *log, struct stripe_head *head_sh);
  8extern void r5l_write_stripe_run(struct r5l_log *log);
  9extern void r5l_flush_stripe_to_raid(struct r5l_log *log);
 10extern void r5l_stripe_write_finished(struct stripe_head *sh);
 11extern int r5l_handle_flush_request(struct r5l_log *log, struct bio *bio);
 12extern void r5l_quiesce(struct r5l_log *log, int quiesce);
 13extern bool r5l_log_disk_error(struct r5conf *conf);
 14extern bool r5c_is_writeback(struct r5l_log *log);
 15extern int
 16r5c_try_caching_write(struct r5conf *conf, struct stripe_head *sh,
 17		      struct stripe_head_state *s, int disks);
 18extern void
 19r5c_finish_stripe_write_out(struct r5conf *conf, struct stripe_head *sh,
 20			    struct stripe_head_state *s);
 21extern void r5c_release_extra_page(struct stripe_head *sh);
 22extern void r5c_use_extra_page(struct stripe_head *sh);
 23extern void r5l_wake_reclaim(struct r5l_log *log, sector_t space);
 24extern void r5c_handle_cached_data_endio(struct r5conf *conf,
 25	struct stripe_head *sh, int disks);
 26extern int r5c_cache_data(struct r5l_log *log, struct stripe_head *sh);
 27extern void r5c_make_stripe_write_out(struct stripe_head *sh);
 28extern void r5c_flush_cache(struct r5conf *conf, int num);
 29extern void r5c_check_stripe_cache_usage(struct r5conf *conf);
 30extern void r5c_check_cached_full_stripe(struct r5conf *conf);
 31extern struct md_sysfs_entry r5c_journal_mode;
 32extern void r5c_update_on_rdev_error(struct mddev *mddev,
 33				     struct md_rdev *rdev);
 34extern bool r5c_big_stripe_cached(struct r5conf *conf, sector_t sect);
 35extern int r5l_start(struct r5l_log *log);
 36
 37extern struct dma_async_tx_descriptor *
 38ops_run_partial_parity(struct stripe_head *sh, struct raid5_percpu *percpu,
 39		       struct dma_async_tx_descriptor *tx);
 40extern int ppl_init_log(struct r5conf *conf);
 41extern void ppl_exit_log(struct r5conf *conf);
 42extern int ppl_write_stripe(struct r5conf *conf, struct stripe_head *sh);
 43extern void ppl_write_stripe_run(struct r5conf *conf);
 44extern void ppl_stripe_write_finished(struct stripe_head *sh);
 45extern int ppl_modify_log(struct r5conf *conf, struct md_rdev *rdev, bool add);
 46extern void ppl_quiesce(struct r5conf *conf, int quiesce);
 47extern int ppl_handle_flush_request(struct r5l_log *log, struct bio *bio);
 48extern struct md_sysfs_entry ppl_write_hint;
 49
 50static inline bool raid5_has_log(struct r5conf *conf)
 51{
 52	return test_bit(MD_HAS_JOURNAL, &conf->mddev->flags);
 53}
 54
 55static inline bool raid5_has_ppl(struct r5conf *conf)
 56{
 57	return test_bit(MD_HAS_PPL, &conf->mddev->flags);
 58}
 59
 60static inline int log_stripe(struct stripe_head *sh, struct stripe_head_state *s)
 61{
 62	struct r5conf *conf = sh->raid_conf;
 63
 64	if (conf->log) {
 65		if (!test_bit(STRIPE_R5C_CACHING, &sh->state)) {
 66			/* writing out phase */
 67			if (s->waiting_extra_page)
 68				return 0;
 69			return r5l_write_stripe(conf->log, sh);
 70		} else if (test_bit(STRIPE_LOG_TRAPPED, &sh->state)) {
 71			/* caching phase */
 72			return r5c_cache_data(conf->log, sh);
 73		}
 74	} else if (raid5_has_ppl(conf)) {
 75		return ppl_write_stripe(conf, sh);
 76	}
 77
 78	return -EAGAIN;
 79}
 80
 81static inline void log_stripe_write_finished(struct stripe_head *sh)
 82{
 83	struct r5conf *conf = sh->raid_conf;
 84
 85	if (conf->log)
 86		r5l_stripe_write_finished(sh);
 87	else if (raid5_has_ppl(conf))
 88		ppl_stripe_write_finished(sh);
 89}
 90
 91static inline void log_write_stripe_run(struct r5conf *conf)
 92{
 93	if (conf->log)
 94		r5l_write_stripe_run(conf->log);
 95	else if (raid5_has_ppl(conf))
 96		ppl_write_stripe_run(conf);
 97}
 98
 99static inline void log_flush_stripe_to_raid(struct r5conf *conf)
100{
101	if (conf->log)
102		r5l_flush_stripe_to_raid(conf->log);
103	else if (raid5_has_ppl(conf))
104		ppl_write_stripe_run(conf);
105}
106
107static inline int log_handle_flush_request(struct r5conf *conf, struct bio *bio)
108{
109	int ret = -ENODEV;
110
111	if (conf->log)
112		ret = r5l_handle_flush_request(conf->log, bio);
113	else if (raid5_has_ppl(conf))
114		ret = ppl_handle_flush_request(conf->log, bio);
115
116	return ret;
117}
118
119static inline void log_quiesce(struct r5conf *conf, int quiesce)
120{
121	if (conf->log)
122		r5l_quiesce(conf->log, quiesce);
123	else if (raid5_has_ppl(conf))
124		ppl_quiesce(conf, quiesce);
125}
126
127static inline void log_exit(struct r5conf *conf)
128{
129	if (conf->log)
130		r5l_exit_log(conf);
131	else if (raid5_has_ppl(conf))
132		ppl_exit_log(conf);
133}
134
135static inline int log_init(struct r5conf *conf, struct md_rdev *journal_dev,
136			   bool ppl)
137{
138	if (journal_dev)
139		return r5l_init_log(conf, journal_dev);
140	else if (ppl)
141		return ppl_init_log(conf);
142
143	return 0;
144}
145
146static inline int log_modify(struct r5conf *conf, struct md_rdev *rdev, bool add)
147{
148	if (raid5_has_ppl(conf))
149		return ppl_modify_log(conf, rdev, add);
150
151	return 0;
152}
153
154#endif