1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _RAID5_LOG_H 3#define _RAID5_LOG_H 4 5extern int r5l_init_log(struct r5conf *conf, struct md_rdev *rdev); 6extern void r5l_exit_log(struct r5conf *conf); 7extern int r5l_write_stripe(struct r5l_log *log, struct stripe_head *head_sh); 8extern void r5l_write_stripe_run(struct r5l_log *log); 9extern void r5l_flush_stripe_to_raid(struct r5l_log *log); 10extern void r5l_stripe_write_finished(struct stripe_head *sh); 11extern int r5l_handle_flush_request(struct r5l_log *log, struct bio *bio); 12extern void r5l_quiesce(struct r5l_log *log, int quiesce); 13extern bool r5l_log_disk_error(struct r5conf *conf); 14extern bool r5c_is_writeback(struct r5l_log *log); 15extern int 16r5c_try_caching_write(struct r5conf *conf, struct stripe_head *sh, 17 struct stripe_head_state *s, int disks); 18extern void 19r5c_finish_stripe_write_out(struct r5conf *conf, struct stripe_head *sh, 20 struct stripe_head_state *s); 21extern void r5c_release_extra_page(struct stripe_head *sh); 22extern void r5c_use_extra_page(struct stripe_head *sh); 23extern void r5l_wake_reclaim(struct r5l_log *log, sector_t space); 24extern void r5c_handle_cached_data_endio(struct r5conf *conf, 25 struct stripe_head *sh, int disks); 26extern int r5c_cache_data(struct r5l_log *log, struct stripe_head *sh); 27extern void r5c_make_stripe_write_out(struct stripe_head *sh); 28extern void r5c_flush_cache(struct r5conf *conf, int num); 29extern void r5c_check_stripe_cache_usage(struct r5conf *conf); 30extern void r5c_check_cached_full_stripe(struct r5conf *conf); 31extern struct md_sysfs_entry r5c_journal_mode; 32extern void r5c_update_on_rdev_error(struct mddev *mddev, 33 struct md_rdev *rdev); 34extern bool r5c_big_stripe_cached(struct r5conf *conf, sector_t sect); 35extern int r5l_start(struct r5l_log *log); 36 37extern struct dma_async_tx_descriptor * 38ops_run_partial_parity(struct stripe_head *sh, struct raid5_percpu *percpu, 39 struct dma_async_tx_descriptor *tx); 40extern int ppl_init_log(struct r5conf *conf); 41extern void ppl_exit_log(struct r5conf *conf); 42extern int ppl_write_stripe(struct r5conf *conf, struct stripe_head *sh); 43extern void ppl_write_stripe_run(struct r5conf *conf); 44extern void ppl_stripe_write_finished(struct stripe_head *sh); 45extern int ppl_modify_log(struct r5conf *conf, struct md_rdev *rdev, bool add); 46extern void ppl_quiesce(struct r5conf *conf, int quiesce); 47extern int ppl_handle_flush_request(struct r5l_log *log, struct bio *bio); 48extern struct md_sysfs_entry ppl_write_hint; 49 50static inline bool raid5_has_log(struct r5conf *conf) 51{ 52 return test_bit(MD_HAS_JOURNAL, &conf->mddev->flags); 53} 54 55static inline bool raid5_has_ppl(struct r5conf *conf) 56{ 57 return test_bit(MD_HAS_PPL, &conf->mddev->flags); 58} 59 60static inline int log_stripe(struct stripe_head *sh, struct stripe_head_state *s) 61{ 62 struct r5conf *conf = sh->raid_conf; 63 64 if (conf->log) { 65 if (!test_bit(STRIPE_R5C_CACHING, &sh->state)) { 66 /* writing out phase */ 67 if (s->waiting_extra_page) 68 return 0; 69 return r5l_write_stripe(conf->log, sh); 70 } else if (test_bit(STRIPE_LOG_TRAPPED, &sh->state)) { 71 /* caching phase */ 72 return r5c_cache_data(conf->log, sh); 73 } 74 } else if (raid5_has_ppl(conf)) { 75 return ppl_write_stripe(conf, sh); 76 } 77 78 return -EAGAIN; 79} 80 81static inline void log_stripe_write_finished(struct stripe_head *sh) 82{ 83 struct r5conf *conf = sh->raid_conf; 84 85 if (conf->log) 86 r5l_stripe_write_finished(sh); 87 else if (raid5_has_ppl(conf)) 88 ppl_stripe_write_finished(sh); 89} 90 91static inline void log_write_stripe_run(struct r5conf *conf) 92{ 93 if (conf->log) 94 r5l_write_stripe_run(conf->log); 95 else if (raid5_has_ppl(conf)) 96 ppl_write_stripe_run(conf); 97} 98 99static inline void log_flush_stripe_to_raid(struct r5conf *conf) 100{ 101 if (conf->log) 102 r5l_flush_stripe_to_raid(conf->log); 103 else if (raid5_has_ppl(conf)) 104 ppl_write_stripe_run(conf); 105} 106 107static inline int log_handle_flush_request(struct r5conf *conf, struct bio *bio) 108{ 109 int ret = -ENODEV; 110 111 if (conf->log) 112 ret = r5l_handle_flush_request(conf->log, bio); 113 else if (raid5_has_ppl(conf)) 114 ret = ppl_handle_flush_request(conf->log, bio); 115 116 return ret; 117} 118 119static inline void log_quiesce(struct r5conf *conf, int quiesce) 120{ 121 if (conf->log) 122 r5l_quiesce(conf->log, quiesce); 123 else if (raid5_has_ppl(conf)) 124 ppl_quiesce(conf, quiesce); 125} 126 127static inline void log_exit(struct r5conf *conf) 128{ 129 if (conf->log) 130 r5l_exit_log(conf); 131 else if (raid5_has_ppl(conf)) 132 ppl_exit_log(conf); 133} 134 135static inline int log_init(struct r5conf *conf, struct md_rdev *journal_dev, 136 bool ppl) 137{ 138 if (journal_dev) 139 return r5l_init_log(conf, journal_dev); 140 else if (ppl) 141 return ppl_init_log(conf); 142 143 return 0; 144} 145 146static inline int log_modify(struct r5conf *conf, struct md_rdev *rdev, bool add) 147{ 148 if (raid5_has_ppl(conf)) 149 return ppl_modify_log(conf, rdev, add); 150 151 return 0; 152} 153 154#endif 155