4 extern int r5l_init_log(struct r5conf
*conf
, struct md_rdev
*rdev
);
5 extern void r5l_exit_log(struct r5conf
*conf
);
6 extern int r5l_write_stripe(struct r5l_log
*log
, struct stripe_head
*head_sh
);
7 extern void r5l_write_stripe_run(struct r5l_log
*log
);
8 extern void r5l_flush_stripe_to_raid(struct r5l_log
*log
);
9 extern void r5l_stripe_write_finished(struct stripe_head
*sh
);
10 extern int r5l_handle_flush_request(struct r5l_log
*log
, struct bio
*bio
);
11 extern void r5l_quiesce(struct r5l_log
*log
, int state
);
12 extern bool r5l_log_disk_error(struct r5conf
*conf
);
13 extern bool r5c_is_writeback(struct r5l_log
*log
);
15 r5c_try_caching_write(struct r5conf
*conf
, struct stripe_head
*sh
,
16 struct stripe_head_state
*s
, int disks
);
18 r5c_finish_stripe_write_out(struct r5conf
*conf
, struct stripe_head
*sh
,
19 struct stripe_head_state
*s
);
20 extern void r5c_release_extra_page(struct stripe_head
*sh
);
21 extern void r5c_use_extra_page(struct stripe_head
*sh
);
22 extern void r5l_wake_reclaim(struct r5l_log
*log
, sector_t space
);
23 extern void r5c_handle_cached_data_endio(struct r5conf
*conf
,
24 struct stripe_head
*sh
, int disks
);
25 extern int r5c_cache_data(struct r5l_log
*log
, struct stripe_head
*sh
);
26 extern void r5c_make_stripe_write_out(struct stripe_head
*sh
);
27 extern void r5c_flush_cache(struct r5conf
*conf
, int num
);
28 extern void r5c_check_stripe_cache_usage(struct r5conf
*conf
);
29 extern void r5c_check_cached_full_stripe(struct r5conf
*conf
);
30 extern struct md_sysfs_entry r5c_journal_mode
;
31 extern void r5c_update_on_rdev_error(struct mddev
*mddev
,
32 struct md_rdev
*rdev
);
33 extern bool r5c_big_stripe_cached(struct r5conf
*conf
, sector_t sect
);
35 extern struct dma_async_tx_descriptor
*
36 ops_run_partial_parity(struct stripe_head
*sh
, struct raid5_percpu
*percpu
,
37 struct dma_async_tx_descriptor
*tx
);
38 extern int ppl_init_log(struct r5conf
*conf
);
39 extern void ppl_exit_log(struct r5conf
*conf
);
40 extern int ppl_write_stripe(struct r5conf
*conf
, struct stripe_head
*sh
);
41 extern void ppl_write_stripe_run(struct r5conf
*conf
);
42 extern void ppl_stripe_write_finished(struct stripe_head
*sh
);
43 extern int ppl_modify_log(struct r5conf
*conf
, struct md_rdev
*rdev
, bool add
);
45 static inline bool raid5_has_ppl(struct r5conf
*conf
)
47 return test_bit(MD_HAS_PPL
, &conf
->mddev
->flags
);
50 static inline int log_stripe(struct stripe_head
*sh
, struct stripe_head_state
*s
)
52 struct r5conf
*conf
= sh
->raid_conf
;
55 if (!test_bit(STRIPE_R5C_CACHING
, &sh
->state
)) {
56 /* writing out phase */
57 if (s
->waiting_extra_page
)
59 return r5l_write_stripe(conf
->log
, sh
);
60 } else if (test_bit(STRIPE_LOG_TRAPPED
, &sh
->state
)) {
62 return r5c_cache_data(conf
->log
, sh
);
64 } else if (raid5_has_ppl(conf
)) {
65 return ppl_write_stripe(conf
, sh
);
71 static inline void log_stripe_write_finished(struct stripe_head
*sh
)
73 struct r5conf
*conf
= sh
->raid_conf
;
76 r5l_stripe_write_finished(sh
);
77 else if (raid5_has_ppl(conf
))
78 ppl_stripe_write_finished(sh
);
81 static inline void log_write_stripe_run(struct r5conf
*conf
)
84 r5l_write_stripe_run(conf
->log
);
85 else if (raid5_has_ppl(conf
))
86 ppl_write_stripe_run(conf
);
89 static inline void log_exit(struct r5conf
*conf
)
93 else if (raid5_has_ppl(conf
))
97 static inline int log_init(struct r5conf
*conf
, struct md_rdev
*journal_dev
,
101 return r5l_init_log(conf
, journal_dev
);
103 return ppl_init_log(conf
);
108 static inline int log_modify(struct r5conf
*conf
, struct md_rdev
*rdev
, bool add
)
110 if (raid5_has_ppl(conf
))
111 return ppl_modify_log(conf
, rdev
, add
);