This source file includes following definitions.
- raid5_has_log
- raid5_has_ppl
- log_stripe
- log_stripe_write_finished
- log_write_stripe_run
- log_flush_stripe_to_raid
- log_handle_flush_request
- log_quiesce
- log_exit
- log_init
- log_modify
1
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
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
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