1 #ifndef _RAID5_LOG_H 2 #define _RAID5_LOG_H 3 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); 14 extern int 15 r5c_try_caching_write(struct r5conf *conf, struct stripe_head *sh, 16 struct stripe_head_state *s, int disks); 17 extern void 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); 34 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); 44 45 static inline bool raid5_has_ppl(struct r5conf *conf) 46 { 47 return test_bit(MD_HAS_PPL, &conf->mddev->flags); 48 } 49 50 static 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 71 static 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 81 static 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 89 static 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 97 static 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 } 107 108 static 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 117