summaryrefslogtreecommitdiff
path: root/drivers/md/raid5-log.h
blob: c8332502669e5612f8628dcd13d8fe33cfa7b505 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _RAID5_LOG_H
#define _RAID5_LOG_H

int r5l_init_log(struct r5conf *conf, struct md_rdev *rdev);
void r5l_exit_log(struct r5conf *conf);
int r5l_write_stripe(struct r5l_log *log, struct stripe_head *head_sh);
void r5l_write_stripe_run(struct r5l_log *log);
void r5l_flush_stripe_to_raid(struct r5l_log *log);
void r5l_stripe_write_finished(struct stripe_head *sh);
int r5l_handle_flush_request(struct r5l_log *log, struct bio *bio);
void r5l_quiesce(struct r5l_log *log, int quiesce);
bool r5l_log_disk_error(struct r5conf *conf);
bool r5c_is_writeback(struct r5l_log *log);
int r5c_try_caching_write(struct r5conf *conf, struct stripe_head *sh,
			  struct stripe_head_state *s, int disks);
void r5c_finish_stripe_write_out(struct r5conf *conf, struct stripe_head *sh,
				 struct stripe_head_state *s);
void r5c_release_extra_page(struct stripe_head *sh);
void r5c_use_extra_page(struct stripe_head *sh);
void r5l_wake_reclaim(struct r5l_log *log, sector_t space);
void r5c_handle_cached_data_endio(struct r5conf *conf,
				  struct stripe_head *sh, int disks);
int r5c_cache_data(struct r5l_log *log, struct stripe_head *sh);
void r5c_make_stripe_write_out(struct stripe_head *sh);
void r5c_flush_cache(struct r5conf *conf, int num);
void r5c_check_stripe_cache_usage(struct r5conf *conf);
void r5c_check_cached_full_stripe(struct r5conf *conf);
extern struct md_sysfs_entry r5c_journal_mode;
void r5c_update_on_rdev_error(struct mddev *mddev, struct md_rdev *rdev);
bool r5c_big_stripe_cached(struct r5conf *conf, sector_t sect);
int r5l_start(struct r5l_log *log);

struct dma_async_tx_descriptor *
ops_run_partial_parity(struct stripe_head *sh, struct raid5_percpu *percpu,
		       struct dma_async_tx_descriptor *tx);
int ppl_init_log(struct r5conf *conf);
void ppl_exit_log(struct r5conf *conf);
int ppl_write_stripe(struct r5conf *conf, struct stripe_head *sh);
void ppl_write_stripe_run(struct r5conf *conf);
void ppl_stripe_write_finished(struct stripe_head *sh);
int ppl_modify_log(struct r5conf *conf, struct md_rdev *rdev, bool add);
void ppl_quiesce(struct r5conf *conf, int quiesce);
int ppl_handle_flush_request(struct bio *bio);
extern struct md_sysfs_entry ppl_write_hint;

static inline bool raid5_has_log(struct r5conf *conf)
{
	return test_bit(MD_HAS_JOURNAL, &conf->mddev->flags);
}

static inline bool raid5_has_ppl(struct r5conf *conf)
{
	return test_bit(MD_HAS_PPL, &conf->mddev->flags);
}

static inline int log_stripe(struct stripe_head *sh, struct stripe_head_state *s)
{
	struct r5conf *conf = sh->raid_conf;

	if (conf->log) {
		if (!test_bit(STRIPE_R5C_CACHING, &sh->state)) {
			/* writing out phase */
			if (s->waiting_extra_page)
				return 0;
			return r5l_write_stripe(conf->log, sh);
		} else if (test_bit(STRIPE_LOG_TRAPPED, &sh->state)) {
			/* caching phase */
			return r5c_cache_data(conf->log, sh);
		}
	} else if (raid5_has_ppl(conf)) {
		return ppl_write_stripe(conf, sh);
	}

	return -EAGAIN;
}

static inline void log_stripe_write_finished(struct stripe_head *sh)
{
	struct r5conf *conf = sh->raid_conf;

	if (conf->log)
		r5l_stripe_write_finished(sh);
	else if (raid5_has_ppl(conf))
		ppl_stripe_write_finished(sh);
}

static inline void log_write_stripe_run(struct r5conf *conf)
{
	if (conf->log)
		r5l_write_stripe_run(conf->log);
	else if (raid5_has_ppl(conf))
		ppl_write_stripe_run(conf);
}

static inline void log_flush_stripe_to_raid(struct r5conf *conf)
{
	if (conf->log)
		r5l_flush_stripe_to_raid(conf->log);
	else if (raid5_has_ppl(conf))
		ppl_write_stripe_run(conf);
}

static inline int log_handle_flush_request(struct r5conf *conf, struct bio *bio)
{
	int ret = -ENODEV;

	if (conf->log)
		ret = r5l_handle_flush_request(conf->log, bio);
	else if (raid5_has_ppl(conf))
		ret = ppl_handle_flush_request(bio);

	return ret;
}

static inline void log_quiesce(struct r5conf *conf, int quiesce)
{
	if (conf->log)
		r5l_quiesce(conf->log, quiesce);
	else if (raid5_has_ppl(conf))
		ppl_quiesce(conf, quiesce);
}

static inline void log_exit(struct r5conf *conf)
{
	if (conf->log)
		r5l_exit_log(conf);
	else if (raid5_has_ppl(conf))
		ppl_exit_log(conf);
}

static inline int log_init(struct r5conf *conf, struct md_rdev *journal_dev,
			   bool ppl)
{
	if (journal_dev)
		return r5l_init_log(conf, journal_dev);
	else if (ppl)
		return ppl_init_log(conf);

	return 0;
}

static inline int log_modify(struct r5conf *conf, struct md_rdev *rdev, bool add)
{
	if (raid5_has_ppl(conf))
		return ppl_modify_log(conf, rdev, add);

	return 0;
}

#endif