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(log: conf->log, head_sh: sh);
67 } else if (test_bit(STRIPE_LOG_TRAPPED, &sh->state)) {
68 /* caching phase */
69 return r5c_cache_data(log: 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(log: 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(log: 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(log: 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(log: 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, rdev: 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
152

source code of linux/drivers/md/raid5-log.h