1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _RAID5_LOG_H 3 #define _RAID5_LOG_H 4 5 extern int r5l_init_log(struct r5conf *conf, struct md_rdev *rdev); 6 extern void r5l_exit_log(struct r5conf *conf); 7 extern int r5l_write_stripe(struct r5l_log *log, struct stripe_head *head_sh); 8 extern void r5l_write_stripe_run(struct r5l_log *log); 9 extern void r5l_flush_stripe_to_raid(struct r5l_log *log); 10 extern void r5l_stripe_write_finished(struct stripe_head *sh); 11 extern int r5l_handle_flush_request(struct r5l_log *log, struct bio *bio); 12 extern void r5l_quiesce(struct r5l_log *log, int quiesce); 13 extern bool r5l_log_disk_error(struct r5conf *conf); 14 extern bool r5c_is_writeback(struct r5l_log *log); 15 extern int 16 r5c_try_caching_write(struct r5conf *conf, struct stripe_head *sh, 17 struct stripe_head_state *s, int disks); 18 extern void 19 r5c_finish_stripe_write_out(struct r5conf *conf, struct stripe_head *sh, 20 struct stripe_head_state *s); 21 extern void r5c_release_extra_page(struct stripe_head *sh); 22 extern void r5c_use_extra_page(struct stripe_head *sh); 23 extern void r5l_wake_reclaim(struct r5l_log *log, sector_t space); 24 extern void r5c_handle_cached_data_endio(struct r5conf *conf, 25 struct stripe_head *sh, int disks); 26 extern int r5c_cache_data(struct r5l_log *log, struct stripe_head *sh); 27 extern void r5c_make_stripe_write_out(struct stripe_head *sh); 28 extern void r5c_flush_cache(struct r5conf *conf, int num); 29 extern void r5c_check_stripe_cache_usage(struct r5conf *conf); 30 extern void r5c_check_cached_full_stripe(struct r5conf *conf); 31 extern struct md_sysfs_entry r5c_journal_mode; 32 extern void r5c_update_on_rdev_error(struct mddev *mddev, 33 struct md_rdev *rdev); 34 extern bool r5c_big_stripe_cached(struct r5conf *conf, sector_t sect); 35 36 extern struct dma_async_tx_descriptor * 37 ops_run_partial_parity(struct stripe_head *sh, struct raid5_percpu *percpu, 38 struct dma_async_tx_descriptor *tx); 39 extern int ppl_init_log(struct r5conf *conf); 40 extern void ppl_exit_log(struct r5conf *conf); 41 extern int ppl_write_stripe(struct r5conf *conf, struct stripe_head *sh); 42 extern void ppl_write_stripe_run(struct r5conf *conf); 43 extern void ppl_stripe_write_finished(struct stripe_head *sh); 44 extern int ppl_modify_log(struct r5conf *conf, struct md_rdev *rdev, bool add); 45 46 static inline bool raid5_has_ppl(struct r5conf *conf) 47 { 48 return test_bit(MD_HAS_PPL, &conf->mddev->flags); 49 } 50 51 static inline int log_stripe(struct stripe_head *sh, struct stripe_head_state *s) 52 { 53 struct r5conf *conf = sh->raid_conf; 54 55 if (conf->log) { 56 if (!test_bit(STRIPE_R5C_CACHING, &sh->state)) { 57 /* writing out phase */ 58 if (s->waiting_extra_page) 59 return 0; 60 return r5l_write_stripe(conf->log, sh); 61 } else if (test_bit(STRIPE_LOG_TRAPPED, &sh->state)) { 62 /* caching phase */ 63 return r5c_cache_data(conf->log, sh); 64 } 65 } else if (raid5_has_ppl(conf)) { 66 return ppl_write_stripe(conf, sh); 67 } 68 69 return -EAGAIN; 70 } 71 72 static inline void log_stripe_write_finished(struct stripe_head *sh) 73 { 74 struct r5conf *conf = sh->raid_conf; 75 76 if (conf->log) 77 r5l_stripe_write_finished(sh); 78 else if (raid5_has_ppl(conf)) 79 ppl_stripe_write_finished(sh); 80 } 81 82 static inline void log_write_stripe_run(struct r5conf *conf) 83 { 84 if (conf->log) 85 r5l_write_stripe_run(conf->log); 86 else if (raid5_has_ppl(conf)) 87 ppl_write_stripe_run(conf); 88 } 89 90 static inline void log_exit(struct r5conf *conf) 91 { 92 if (conf->log) 93 r5l_exit_log(conf); 94 else if (raid5_has_ppl(conf)) 95 ppl_exit_log(conf); 96 } 97 98 static inline int log_init(struct r5conf *conf, struct md_rdev *journal_dev, 99 bool ppl) 100 { 101 if (journal_dev) 102 return r5l_init_log(conf, journal_dev); 103 else if (ppl) 104 return ppl_init_log(conf); 105 106 return 0; 107 } 108 109 static inline int log_modify(struct r5conf *conf, struct md_rdev *rdev, bool add) 110 { 111 if (raid5_has_ppl(conf)) 112 return ppl_modify_log(conf, rdev, add); 113 114 return 0; 115 } 116 117 #endif 118