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Subject[PATCH v2 md-6.11 01/12] md: rearrange recovery_flags
Date
From: Yu Kuai <yukuai3@huawei.com>

Currently there are lots of flags with the same confusing prefix
"MD_REOCVERY_", and there are two main types of flags, sync thread runnng
status, I prefer prefix "SYNC_THREAD_", and sync thread action, I perfer
prefix "SYNC_ACTION_".

For now, rearrange and update comment to improve code readability,
there are no functional changes.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
---
drivers/md/md.h | 52 ++++++++++++++++++++++++++++++++++++-------------
1 file changed, 38 insertions(+), 14 deletions(-)

diff --git a/drivers/md/md.h b/drivers/md/md.h
index 487582058f74..1ee129c6f98f 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -551,22 +551,46 @@ struct mddev {
};

enum recovery_flags {
+ /* flags for sync thread running status */
+
+ /*
+ * set when one of sync action is set and new sync thread need to be
+ * registered, or just add/remove spares from conf.
+ */
+ MD_RECOVERY_NEEDED,
+ /* sync thread is running, or about to be started */
+ MD_RECOVERY_RUNNING,
+ /* sync thread needs to be aborted for some reason */
+ MD_RECOVERY_INTR,
+ /* sync thread is done and is waiting to be unregistered */
+ MD_RECOVERY_DONE,
+ /* running sync thread must abort immediately, and not restart */
+ MD_RECOVERY_FROZEN,
+ /* waiting for pers->start() to finish */
+ MD_RECOVERY_WAIT,
+ /* interrupted because io-error */
+ MD_RECOVERY_ERROR,
+
+ /* flags determines sync action */
+
+ /* if just this flag is set, action is resync. */
+ MD_RECOVERY_SYNC,
+ /*
+ * paired with MD_RECOVERY_SYNC, if MD_RECOVERY_CHECK is not set,
+ * action is repair, means user requested resync.
+ */
+ MD_RECOVERY_REQUESTED,
/*
- * If neither SYNC or RESHAPE are set, then it is a recovery.
+ * paired with MD_RECOVERY_SYNC and MD_RECOVERY_REQUESTED, action is
+ * check.
*/
- MD_RECOVERY_RUNNING, /* a thread is running, or about to be started */
- MD_RECOVERY_SYNC, /* actually doing a resync, not a recovery */
- MD_RECOVERY_RECOVER, /* doing recovery, or need to try it. */
- MD_RECOVERY_INTR, /* resync needs to be aborted for some reason */
- MD_RECOVERY_DONE, /* thread is done and is waiting to be reaped */
- MD_RECOVERY_NEEDED, /* we might need to start a resync/recover */
- MD_RECOVERY_REQUESTED, /* user-space has requested a sync (used with SYNC) */
- MD_RECOVERY_CHECK, /* user-space request for check-only, no repair */
- MD_RECOVERY_RESHAPE, /* A reshape is happening */
- MD_RECOVERY_FROZEN, /* User request to abort, and not restart, any action */
- MD_RECOVERY_ERROR, /* sync-action interrupted because io-error */
- MD_RECOVERY_WAIT, /* waiting for pers->start() to finish */
- MD_RESYNCING_REMOTE, /* remote node is running resync thread */
+ MD_RECOVERY_CHECK,
+ /* recovery, or need to try it */
+ MD_RECOVERY_RECOVER,
+ /* reshape */
+ MD_RECOVERY_RESHAPE,
+ /* remote node is running resync thread */
+ MD_RESYNCING_REMOTE,
};

enum md_ro_state {
--
2.39.2

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