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authorArtur Paszkiewicz <artur.paszkiewicz@intel.com>2017-03-09 11:59:58 +0300
committerShaohua Li <shli@fb.com>2017-03-17 02:55:54 +0300
commitff875738edd44e3bc892d378deacc50bccc9d70c (patch)
tree9c831895576861c9ae3c30fca2702d673b6f4eaf /drivers/md/raid5-log.h
parentea0213e0c7cc1c1b52badf27bd7db4f50a67baaa (diff)
downloadlinux-ff875738edd44e3bc892d378deacc50bccc9d70c.tar.xz
raid5: separate header for log functions
Move raid5-cache declarations from raid5.h to raid5-log.h, add inline wrappers for functions which will be shared with ppl and use them in raid5 core instead of direct calls to raid5-cache. Remove unused parameter from r5c_cache_data(), move two duplicated pr_debug() calls to r5l_init_log(). Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com> Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/raid5-log.h')
-rw-r--r--drivers/md/raid5-log.h81
1 files changed, 81 insertions, 0 deletions
diff --git a/drivers/md/raid5-log.h b/drivers/md/raid5-log.h
new file mode 100644
index 000000000000..2da4bd3bbd79
--- /dev/null
+++ b/drivers/md/raid5-log.h
@@ -0,0 +1,81 @@
+#ifndef _RAID5_LOG_H
+#define _RAID5_LOG_H
+
+extern int r5l_init_log(struct r5conf *conf, struct md_rdev *rdev);
+extern void r5l_exit_log(struct r5conf *conf);
+extern int r5l_write_stripe(struct r5l_log *log, struct stripe_head *head_sh);
+extern void r5l_write_stripe_run(struct r5l_log *log);
+extern void r5l_flush_stripe_to_raid(struct r5l_log *log);
+extern void r5l_stripe_write_finished(struct stripe_head *sh);
+extern int r5l_handle_flush_request(struct r5l_log *log, struct bio *bio);
+extern void r5l_quiesce(struct r5l_log *log, int state);
+extern bool r5l_log_disk_error(struct r5conf *conf);
+extern bool r5c_is_writeback(struct r5l_log *log);
+extern int
+r5c_try_caching_write(struct r5conf *conf, struct stripe_head *sh,
+ struct stripe_head_state *s, int disks);
+extern void
+r5c_finish_stripe_write_out(struct r5conf *conf, struct stripe_head *sh,
+ struct stripe_head_state *s);
+extern void r5c_release_extra_page(struct stripe_head *sh);
+extern void r5c_use_extra_page(struct stripe_head *sh);
+extern void r5l_wake_reclaim(struct r5l_log *log, sector_t space);
+extern void r5c_handle_cached_data_endio(struct r5conf *conf,
+ struct stripe_head *sh, int disks, struct bio_list *return_bi);
+extern int r5c_cache_data(struct r5l_log *log, struct stripe_head *sh);
+extern void r5c_make_stripe_write_out(struct stripe_head *sh);
+extern void r5c_flush_cache(struct r5conf *conf, int num);
+extern void r5c_check_stripe_cache_usage(struct r5conf *conf);
+extern void r5c_check_cached_full_stripe(struct r5conf *conf);
+extern struct md_sysfs_entry r5c_journal_mode;
+extern void r5c_update_on_rdev_error(struct mddev *mddev);
+extern bool r5c_big_stripe_cached(struct r5conf *conf, sector_t sect);
+
+static inline int log_stripe(struct stripe_head *sh, struct stripe_head_state *s)
+{
+ struct r5conf *conf = sh->raid_conf;
+
+ if (conf->log) {
+ if (!test_bit(STRIPE_R5C_CACHING, &sh->state)) {
+ /* writing out phase */
+ if (s->waiting_extra_page)
+ return 0;
+ return r5l_write_stripe(conf->log, sh);
+ } else if (test_bit(STRIPE_LOG_TRAPPED, &sh->state)) {
+ /* caching phase */
+ return r5c_cache_data(conf->log, sh);
+ }
+ }
+
+ return -EAGAIN;
+}
+
+static inline void log_stripe_write_finished(struct stripe_head *sh)
+{
+ struct r5conf *conf = sh->raid_conf;
+
+ if (conf->log)
+ r5l_stripe_write_finished(sh);
+}
+
+static inline void log_write_stripe_run(struct r5conf *conf)
+{
+ if (conf->log)
+ r5l_write_stripe_run(conf->log);
+}
+
+static inline void log_exit(struct r5conf *conf)
+{
+ if (conf->log)
+ r5l_exit_log(conf);
+}
+
+static inline int log_init(struct r5conf *conf, struct md_rdev *journal_dev)
+{
+ if (journal_dev)
+ return r5l_init_log(conf, journal_dev);
+
+ return 0;
+}
+
+#endif