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