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
36 extern struct dma_async_tx_descriptor *
37 ops_run_partial_parity(struct stripe_head *sh, struct raid5_percpu *percpu,
38 struct dma_async_tx_descriptor *tx);
39 extern int ppl_init_log(struct r5conf *conf);
40 extern void ppl_exit_log(struct r5conf *conf);
41 extern int ppl_write_stripe(struct r5conf *conf, struct stripe_head *sh);
42 extern void ppl_write_stripe_run(struct r5conf *conf);
43 extern void ppl_stripe_write_finished(struct stripe_head *sh);
44 extern int ppl_modify_log(struct r5conf *conf, struct md_rdev *rdev, bool add);
45
raid5_has_log(struct r5conf * conf)46 static inline bool raid5_has_log(struct r5conf *conf)
47 {
48 return test_bit(MD_HAS_JOURNAL, &conf->mddev->flags);
49 }
50
raid5_has_ppl(struct r5conf * conf)51 static inline bool raid5_has_ppl(struct r5conf *conf)
52 {
53 return test_bit(MD_HAS_PPL, &conf->mddev->flags);
54 }
55
log_stripe(struct stripe_head * sh,struct stripe_head_state * s)56 static inline int log_stripe(struct stripe_head *sh, struct stripe_head_state *s)
57 {
58 struct r5conf *conf = sh->raid_conf;
59
60 if (conf->log) {
61 if (!test_bit(STRIPE_R5C_CACHING, &sh->state)) {
62 /* writing out phase */
63 if (s->waiting_extra_page)
64 return 0;
65 return r5l_write_stripe(conf->log, sh);
66 } else if (test_bit(STRIPE_LOG_TRAPPED, &sh->state)) {
67 /* caching phase */
68 return r5c_cache_data(conf->log, sh);
69 }
70 } else if (raid5_has_ppl(conf)) {
71 return ppl_write_stripe(conf, sh);
72 }
73
74 return -EAGAIN;
75 }
76
log_stripe_write_finished(struct stripe_head * sh)77 static inline void log_stripe_write_finished(struct stripe_head *sh)
78 {
79 struct r5conf *conf = sh->raid_conf;
80
81 if (conf->log)
82 r5l_stripe_write_finished(sh);
83 else if (raid5_has_ppl(conf))
84 ppl_stripe_write_finished(sh);
85 }
86
log_write_stripe_run(struct r5conf * conf)87 static inline void log_write_stripe_run(struct r5conf *conf)
88 {
89 if (conf->log)
90 r5l_write_stripe_run(conf->log);
91 else if (raid5_has_ppl(conf))
92 ppl_write_stripe_run(conf);
93 }
94
log_exit(struct r5conf * conf)95 static inline void log_exit(struct r5conf *conf)
96 {
97 if (conf->log)
98 r5l_exit_log(conf);
99 else if (raid5_has_ppl(conf))
100 ppl_exit_log(conf);
101 }
102
log_init(struct r5conf * conf,struct md_rdev * journal_dev,bool ppl)103 static inline int log_init(struct r5conf *conf, struct md_rdev *journal_dev,
104 bool ppl)
105 {
106 if (journal_dev)
107 return r5l_init_log(conf, journal_dev);
108 else if (ppl)
109 return ppl_init_log(conf);
110
111 return 0;
112 }
113
log_modify(struct r5conf * conf,struct md_rdev * rdev,bool add)114 static inline int log_modify(struct r5conf *conf, struct md_rdev *rdev, bool add)
115 {
116 if (raid5_has_ppl(conf))
117 return ppl_modify_log(conf, rdev, add);
118
119 return 0;
120 }
121
122 #endif
123