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