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