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
  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