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
  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