drivers/md/raid5-log.h

   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 extern struct md_sysfs_entry ppl_write_hint;
  49
  50 static inline bool raid5_has_log(struct r5conf *conf)
  51 {
  52         return test_bit(MD_HAS_JOURNAL, &conf->mddev->flags);
  53 }
  54
  55 static inline bool raid5_has_ppl(struct r5conf *conf)
  56 {
  57         return test_bit(MD_HAS_PPL, &conf->mddev->flags);
  58 }
  59
  60 static 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
  81 static 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
  91 static 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
  99 static 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
 107 static 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
 119 static 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
 127 static 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
 135 static 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
 146 static 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