Hi, 在 2024/05/14 14:52, Xiao Ni 写道:
On Mon, May 13, 2024 at 5:31 PM Yu Kuai <yukuai1@xxxxxxxxxxxxxxx> wrote:From: Yu Kuai <yukuai3@xxxxxxxxxx> The new helpers will get current sync_action of the array, will be used in later patches to make code cleaner. Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx> --- drivers/md/md.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++ drivers/md/md.h | 3 +++ 2 files changed, 67 insertions(+) diff --git a/drivers/md/md.c b/drivers/md/md.c index 00bbafcd27bb..48ec35342d1b 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -69,6 +69,16 @@ #include "md-bitmap.h" #include "md-cluster.h" +static char *action_name[NR_SYNC_ACTIONS] = { + [ACTION_RESYNC] = "resync", + [ACTION_RECOVER] = "recover", + [ACTION_CHECK] = "check", + [ACTION_REPAIR] = "repair", + [ACTION_RESHAPE] = "reshape", + [ACTION_FROZEN] = "frozen", + [ACTION_IDLE] = "idle", +}; + /* pers_list is a list of registered personalities protected by pers_lock. */ static LIST_HEAD(pers_list); static DEFINE_SPINLOCK(pers_lock); @@ -4867,6 +4877,60 @@ metadata_store(struct mddev *mddev, const char *buf, size_t len) static struct md_sysfs_entry md_metadata = __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store); +enum sync_action md_sync_action(struct mddev *mddev) +{ + unsigned long recovery = mddev->recovery; + + /* + * frozen has the highest priority, means running sync_thread will be + * stopped immediately, and no new sync_thread can start. + */ + if (test_bit(MD_RECOVERY_FROZEN, &recovery)) + return ACTION_FROZEN; + + /* + * idle means no sync_thread is running, and no new sync_thread is + * requested. + */ + if (!test_bit(MD_RECOVERY_RUNNING, &recovery) && + (!md_is_rdwr(mddev) || !test_bit(MD_RECOVERY_NEEDED, &recovery))) + return ACTION_IDLE;Hi Kuai Can I think the above judgement cover these two situations: 1. The array is readonly / readauto and it doesn't have MD_RECOVERY_RUNNING. Now maybe it has MD_RECOVERY_NEEDED, it means one array may want to do some sync action, but the array state is not readwrite and it can't start. 2. The array doesn't have MD_RECOVERY_RUNNING and MD_RECOVERY_NEEDED+ + if (test_bit(MD_RECOVERY_RESHAPE, &recovery) || + mddev->reshape_position != MaxSector) + return ACTION_RESHAPE; + + if (test_bit(MD_RECOVERY_RECOVER, &recovery)) + return ACTION_RECOVER; + + if (test_bit(MD_RECOVERY_SYNC, &recovery)) { + if (test_bit(MD_RECOVERY_CHECK, &recovery)) + return ACTION_CHECK; + if (test_bit(MD_RECOVERY_REQUESTED, &recovery)) + return ACTION_REPAIR; + return ACTION_RESYNC; + } + + return ACTION_IDLE;Does it need this? I guess it's the reason in case there are other situations, right?
Yes, we need this, because they are many places to set MD_RECOVERY_NEEDED, while there are no sync action actually, this case is 'idle'. Thanks, Kuai
Regards Xiao+} + +enum sync_action md_sync_action_by_name(char *page) +{ + enum sync_action action; + + for (action = 0; action < NR_SYNC_ACTIONS; ++action) { + if (cmd_match(page, action_name[action])) + return action; + } + + return NR_SYNC_ACTIONS; +} + +char *md_sync_action_name(enum sync_action action) +{ + return action_name[action]; +} + static ssize_t action_show(struct mddev *mddev, char *page) { diff --git a/drivers/md/md.h b/drivers/md/md.h index 2edad966f90a..72ca7a796df5 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -864,6 +864,9 @@ extern void md_unregister_thread(struct mddev *mddev, struct md_thread __rcu **t extern void md_wakeup_thread(struct md_thread __rcu *thread); extern void md_check_recovery(struct mddev *mddev); extern void md_reap_sync_thread(struct mddev *mddev); +extern enum sync_action md_sync_action(struct mddev *mddev); +extern enum sync_action md_sync_action_by_name(char *page); +extern char *md_sync_action_name(enum sync_action action); extern bool md_write_start(struct mddev *mddev, struct bio *bi); extern void md_write_inc(struct mddev *mddev, struct bio *bi); extern void md_write_end(struct mddev *mddev); -- 2.39.2.
