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 extern int r5l_start(struct r5l_log *log); 36 37 extern struct dma_async_tx_descriptor * 38 ops_run_partial_parity(struct stripe_head *sh, struct raid5_percpu *percpu, 39 struct dma_async_tx_descriptor *tx); 40 extern int ppl_init_log(struct r5conf *conf); 41 extern void ppl_exit_log(struct r5conf *conf); 42 extern int ppl_write_stripe(struct r5conf *conf, struct stripe_head *sh); 43 extern void ppl_write_stripe_run(struct r5conf *conf); 44 extern void ppl_stripe_write_finished(struct stripe_head *sh); 45 extern int ppl_modify_log(struct r5conf *conf, struct md_rdev *rdev, bool add); 46 extern void ppl_quiesce(struct r5conf *conf, int quiesce); 47 extern int ppl_handle_flush_request(struct r5l_log *log, struct bio *bio); 48 49 static inline bool raid5_has_ppl(struct r5conf *conf) 50 { 51 return test_bit(MD_HAS_PPL, &conf->mddev->flags); 52 } 53 54 static inline int log_stripe(struct stripe_head *sh, struct stripe_head_state *s) 55 { 56 struct r5conf *conf = sh->raid_conf; 57 58 if (conf->log) { 59 if (!test_bit(STRIPE_R5C_CACHING, &sh->state)) { 60 /* writing out phase */ 61 if (s->waiting_extra_page) 62 return 0; 63 return r5l_write_stripe(conf->log, sh); 64 } else if (test_bit(STRIPE_LOG_TRAPPED, &sh->state)) { 65 /* caching phase */ 66 return r5c_cache_data(conf->log, sh); 67 } 68 } else if (raid5_has_ppl(conf)) { 69 return ppl_write_stripe(conf, sh); 70 } 71 72 return -EAGAIN; 73 } 74 75 static inline void log_stripe_write_finished(struct stripe_head *sh) 76 { 77 struct r5conf *conf = sh->raid_conf; 78 79 if (conf->log) 80 r5l_stripe_write_finished(sh); 81 else if (raid5_has_ppl(conf)) 82 ppl_stripe_write_finished(sh); 83 } 84 85 static inline void log_write_stripe_run(struct r5conf *conf) 86 { 87 if (conf->log) 88 r5l_write_stripe_run(conf->log); 89 else if (raid5_has_ppl(conf)) 90 ppl_write_stripe_run(conf); 91 } 92 93 static inline void log_flush_stripe_to_raid(struct r5conf *conf) 94 { 95 if (conf->log) 96 r5l_flush_stripe_to_raid(conf->log); 97 else if (raid5_has_ppl(conf)) 98 ppl_write_stripe_run(conf); 99 } 100 101 static inline int log_handle_flush_request(struct r5conf *conf, struct bio *bio) 102 { 103 int ret = -ENODEV; 104 105 if (conf->log) 106 ret = r5l_handle_flush_request(conf->log, bio); 107 else if (raid5_has_ppl(conf)) 108 ret = ppl_handle_flush_request(conf->log, bio); 109 110 return ret; 111 } 112 113 static inline void log_quiesce(struct r5conf *conf, int quiesce) 114 { 115 if (conf->log) 116 r5l_quiesce(conf->log, quiesce); 117 else if (raid5_has_ppl(conf)) 118 ppl_quiesce(conf, quiesce); 119 } 120 121 static inline void log_exit(struct r5conf *conf) 122 { 123 if (conf->log) 124 r5l_exit_log(conf); 125 else if (raid5_has_ppl(conf)) 126 ppl_exit_log(conf); 127 } 128 129 static inline int log_init(struct r5conf *conf, struct md_rdev *journal_dev, 130 bool ppl) 131 { 132 if (journal_dev) 133 return r5l_init_log(conf, journal_dev); 134 else if (ppl) 135 return ppl_init_log(conf); 136 137 return 0; 138 } 139 140 static inline int log_modify(struct r5conf *conf, struct md_rdev *rdev, bool add) 141 { 142 if (raid5_has_ppl(conf)) 143 return ppl_modify_log(conf, rdev, add); 144 145 return 0; 146 } 147 148 #endif 149