xref: /openbmc/linux/drivers/md/raid5-log.h (revision b830f94f)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _RAID5_LOG_H
3 #define _RAID5_LOG_H
4 
5 extern int r5l_init_log(struct r5conf *conf, struct md_rdev *rdev);
6 extern void r5l_exit_log(struct r5conf *conf);
7 extern int r5l_write_stripe(struct r5l_log *log, struct stripe_head *head_sh);
8 extern void r5l_write_stripe_run(struct r5l_log *log);
9 extern void r5l_flush_stripe_to_raid(struct r5l_log *log);
10 extern void r5l_stripe_write_finished(struct stripe_head *sh);
11 extern int r5l_handle_flush_request(struct r5l_log *log, struct bio *bio);
12 extern void r5l_quiesce(struct r5l_log *log, int quiesce);
13 extern bool r5l_log_disk_error(struct r5conf *conf);
14 extern bool r5c_is_writeback(struct r5l_log *log);
15 extern int
16 r5c_try_caching_write(struct r5conf *conf, struct stripe_head *sh,
17 		      struct stripe_head_state *s, int disks);
18 extern void
19 r5c_finish_stripe_write_out(struct r5conf *conf, struct stripe_head *sh,
20 			    struct stripe_head_state *s);
21 extern void r5c_release_extra_page(struct stripe_head *sh);
22 extern void r5c_use_extra_page(struct stripe_head *sh);
23 extern void r5l_wake_reclaim(struct r5l_log *log, sector_t space);
24 extern void r5c_handle_cached_data_endio(struct r5conf *conf,
25 	struct stripe_head *sh, int disks);
26 extern int r5c_cache_data(struct r5l_log *log, struct stripe_head *sh);
27 extern void r5c_make_stripe_write_out(struct stripe_head *sh);
28 extern void r5c_flush_cache(struct r5conf *conf, int num);
29 extern void r5c_check_stripe_cache_usage(struct r5conf *conf);
30 extern void r5c_check_cached_full_stripe(struct r5conf *conf);
31 extern struct md_sysfs_entry r5c_journal_mode;
32 extern void r5c_update_on_rdev_error(struct mddev *mddev,
33 				     struct md_rdev *rdev);
34 extern bool r5c_big_stripe_cached(struct r5conf *conf, sector_t sect);
35 extern int r5l_start(struct r5l_log *log);
36 
37 extern struct dma_async_tx_descriptor *
38 ops_run_partial_parity(struct stripe_head *sh, struct raid5_percpu *percpu,
39 		       struct dma_async_tx_descriptor *tx);
40 extern int ppl_init_log(struct r5conf *conf);
41 extern void ppl_exit_log(struct r5conf *conf);
42 extern int ppl_write_stripe(struct r5conf *conf, struct stripe_head *sh);
43 extern void ppl_write_stripe_run(struct r5conf *conf);
44 extern void ppl_stripe_write_finished(struct stripe_head *sh);
45 extern int ppl_modify_log(struct r5conf *conf, struct md_rdev *rdev, bool add);
46 extern void ppl_quiesce(struct r5conf *conf, int quiesce);
47 extern int ppl_handle_flush_request(struct r5l_log *log, struct bio *bio);
48 extern struct md_sysfs_entry ppl_write_hint;
49 
50 static inline bool raid5_has_log(struct r5conf *conf)
51 {
52 	return test_bit(MD_HAS_JOURNAL, &conf->mddev->flags);
53 }
54 
55 static inline bool raid5_has_ppl(struct r5conf *conf)
56 {
57 	return test_bit(MD_HAS_PPL, &conf->mddev->flags);
58 }
59 
60 static 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 
81 static 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 
91 static 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 
99 static 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 
107 static 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 
119 static 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 
127 static 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 
135 static 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 
146 static 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
155