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
raid5_has_log(struct r5conf * conf)49 static inline bool raid5_has_log(struct r5conf *conf)
50 {
51 return test_bit(MD_HAS_JOURNAL, &conf->mddev->flags);
52 }
53
raid5_has_ppl(struct r5conf * conf)54 static inline bool raid5_has_ppl(struct r5conf *conf)
55 {
56 return test_bit(MD_HAS_PPL, &conf->mddev->flags);
57 }
58
log_stripe(struct stripe_head * sh,struct stripe_head_state * s)59 static inline int log_stripe(struct stripe_head *sh, struct stripe_head_state *s)
60 {
61 struct r5conf *conf = sh->raid_conf;
62
63 if (conf->log) {
64 if (!test_bit(STRIPE_R5C_CACHING, &sh->state)) {
65 /* writing out phase */
66 if (s->waiting_extra_page)
67 return 0;
68 return r5l_write_stripe(conf->log, sh);
69 } else if (test_bit(STRIPE_LOG_TRAPPED, &sh->state)) {
70 /* caching phase */
71 return r5c_cache_data(conf->log, sh);
72 }
73 } else if (raid5_has_ppl(conf)) {
74 return ppl_write_stripe(conf, sh);
75 }
76
77 return -EAGAIN;
78 }
79
log_stripe_write_finished(struct stripe_head * sh)80 static inline void log_stripe_write_finished(struct stripe_head *sh)
81 {
82 struct r5conf *conf = sh->raid_conf;
83
84 if (conf->log)
85 r5l_stripe_write_finished(sh);
86 else if (raid5_has_ppl(conf))
87 ppl_stripe_write_finished(sh);
88 }
89
log_write_stripe_run(struct r5conf * conf)90 static inline void log_write_stripe_run(struct r5conf *conf)
91 {
92 if (conf->log)
93 r5l_write_stripe_run(conf->log);
94 else if (raid5_has_ppl(conf))
95 ppl_write_stripe_run(conf);
96 }
97
log_flush_stripe_to_raid(struct r5conf * conf)98 static inline void log_flush_stripe_to_raid(struct r5conf *conf)
99 {
100 if (conf->log)
101 r5l_flush_stripe_to_raid(conf->log);
102 else if (raid5_has_ppl(conf))
103 ppl_write_stripe_run(conf);
104 }
105
log_handle_flush_request(struct r5conf * conf,struct bio * bio)106 static inline int log_handle_flush_request(struct r5conf *conf, struct bio *bio)
107 {
108 int ret = -ENODEV;
109
110 if (conf->log)
111 ret = r5l_handle_flush_request(conf->log, bio);
112 else if (raid5_has_ppl(conf))
113 ret = ppl_handle_flush_request(conf->log, bio);
114
115 return ret;
116 }
117
log_quiesce(struct r5conf * conf,int quiesce)118 static inline void log_quiesce(struct r5conf *conf, int quiesce)
119 {
120 if (conf->log)
121 r5l_quiesce(conf->log, quiesce);
122 else if (raid5_has_ppl(conf))
123 ppl_quiesce(conf, quiesce);
124 }
125
log_exit(struct r5conf * conf)126 static inline void log_exit(struct r5conf *conf)
127 {
128 if (conf->log)
129 r5l_exit_log(conf);
130 else if (raid5_has_ppl(conf))
131 ppl_exit_log(conf);
132 }
133
log_init(struct r5conf * conf,struct md_rdev * journal_dev,bool ppl)134 static inline int log_init(struct r5conf *conf, struct md_rdev *journal_dev,
135 bool ppl)
136 {
137 if (journal_dev)
138 return r5l_init_log(conf, journal_dev);
139 else if (ppl)
140 return ppl_init_log(conf);
141
142 return 0;
143 }
144
log_modify(struct r5conf * conf,struct md_rdev * rdev,bool add)145 static inline int log_modify(struct r5conf *conf, struct md_rdev *rdev, bool add)
146 {
147 if (raid5_has_ppl(conf))
148 return ppl_modify_log(conf, rdev, add);
149
150 return 0;
151 }
152
153 #endif
154
