tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _RAID5_LOG_H
2#define _RAID5_LOG_H
3
4extern int r5l_init_log(struct r5conf *conf, struct md_rdev *rdev);
5extern void r5l_exit_log(struct r5conf *conf);
6extern int r5l_write_stripe(struct r5l_log *log, struct stripe_head *head_sh);
7extern void r5l_write_stripe_run(struct r5l_log *log);
8extern void r5l_flush_stripe_to_raid(struct r5l_log *log);
9extern void r5l_stripe_write_finished(struct stripe_head *sh);
10extern int r5l_handle_flush_request(struct r5l_log *log, struct bio *bio);
11extern void r5l_quiesce(struct r5l_log *log, int state);
12extern bool r5l_log_disk_error(struct r5conf *conf);
13extern bool r5c_is_writeback(struct r5l_log *log);
14extern int
15r5c_try_caching_write(struct r5conf *conf, struct stripe_head *sh,
16 struct stripe_head_state *s, int disks);
17extern void
18r5c_finish_stripe_write_out(struct r5conf *conf, struct stripe_head *sh,
19 struct stripe_head_state *s);
20extern void r5c_release_extra_page(struct stripe_head *sh);
21extern void r5c_use_extra_page(struct stripe_head *sh);
22extern void r5l_wake_reclaim(struct r5l_log *log, sector_t space);
23extern void r5c_handle_cached_data_endio(struct r5conf *conf,
24 struct stripe_head *sh, int disks);
25extern int r5c_cache_data(struct r5l_log *log, struct stripe_head *sh);
26extern void r5c_make_stripe_write_out(struct stripe_head *sh);
27extern void r5c_flush_cache(struct r5conf *conf, int num);
28extern void r5c_check_stripe_cache_usage(struct r5conf *conf);
29extern void r5c_check_cached_full_stripe(struct r5conf *conf);
30extern struct md_sysfs_entry r5c_journal_mode;
31extern void r5c_update_on_rdev_error(struct mddev *mddev,
32 struct md_rdev *rdev);
33extern bool r5c_big_stripe_cached(struct r5conf *conf, sector_t sect);
34
35extern struct dma_async_tx_descriptor *
36ops_run_partial_parity(struct stripe_head *sh, struct raid5_percpu *percpu,
37 struct dma_async_tx_descriptor *tx);
38extern int ppl_init_log(struct r5conf *conf);
39extern void ppl_exit_log(struct r5conf *conf);
40extern int ppl_write_stripe(struct r5conf *conf, struct stripe_head *sh);
41extern void ppl_write_stripe_run(struct r5conf *conf);
42extern void ppl_stripe_write_finished(struct stripe_head *sh);
43extern int ppl_modify_log(struct r5conf *conf, struct md_rdev *rdev, bool add);
44
45static inline bool raid5_has_ppl(struct r5conf *conf)
46{
47 return test_bit(MD_HAS_PPL, &conf->mddev->flags);
48}
49
50static inline int log_stripe(struct stripe_head *sh, struct stripe_head_state *s)
51{
52 struct r5conf *conf = sh->raid_conf;
53
54 if (conf->log) {
55 if (!test_bit(STRIPE_R5C_CACHING, &sh->state)) {
56 /* writing out phase */
57 if (s->waiting_extra_page)
58 return 0;
59 return r5l_write_stripe(conf->log, sh);
60 } else if (test_bit(STRIPE_LOG_TRAPPED, &sh->state)) {
61 /* caching phase */
62 return r5c_cache_data(conf->log, sh);
63 }
64 } else if (raid5_has_ppl(conf)) {
65 return ppl_write_stripe(conf, sh);
66 }
67
68 return -EAGAIN;
69}
70
71static inline void log_stripe_write_finished(struct stripe_head *sh)
72{
73 struct r5conf *conf = sh->raid_conf;
74
75 if (conf->log)
76 r5l_stripe_write_finished(sh);
77 else if (raid5_has_ppl(conf))
78 ppl_stripe_write_finished(sh);
79}
80
81static inline void log_write_stripe_run(struct r5conf *conf)
82{
83 if (conf->log)
84 r5l_write_stripe_run(conf->log);
85 else if (raid5_has_ppl(conf))
86 ppl_write_stripe_run(conf);
87}
88
89static inline void log_exit(struct r5conf *conf)
90{
91 if (conf->log)
92 r5l_exit_log(conf);
93 else if (raid5_has_ppl(conf))
94 ppl_exit_log(conf);
95}
96
97static inline int log_init(struct r5conf *conf, struct md_rdev *journal_dev,
98 bool ppl)
99{
100 if (journal_dev)
101 return r5l_init_log(conf, journal_dev);
102 else if (ppl)
103 return ppl_init_log(conf);
104
105 return 0;
106}
107
108static inline int log_modify(struct r5conf *conf, struct md_rdev *rdev, bool add)
109{
110 if (raid5_has_ppl(conf))
111 return ppl_modify_log(conf, rdev, add);
112
113 return 0;
114}
115
116#endif