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md: add new helpers for sync_action

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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@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20240611132251.1967786-4-yukuai1@huaweicloud.com
This commit is contained in:
Yu Kuai 2024-06-11 21:22:42 +08:00 committed by Song Liu
parent a85aa09da2
commit e792a4c215
2 changed files with 82 additions and 0 deletions
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79
drivers/md/md.c
View File

@ -69,6 +69,16 @@
#include "md-bitmap.h"
#include "md-cluster.h"
static const 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);
@ -4868,6 +4878,75 @@ 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;
/*
* read-only array can't register sync_thread, and it can only
* add/remove spares.
*/
if (!md_is_rdwr(mddev))
return ACTION_IDLE;
/*
* idle means no sync_thread is running, and no new sync_thread is
* requested.
*/
if (!test_bit(MD_RECOVERY_RUNNING, &recovery) &&
!test_bit(MD_RECOVERY_NEEDED, &recovery))
return ACTION_IDLE;
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)) {
/*
* MD_RECOVERY_CHECK must be paired with
* MD_RECOVERY_REQUESTED.
*/
if (test_bit(MD_RECOVERY_CHECK, &recovery))
return ACTION_CHECK;
if (test_bit(MD_RECOVERY_REQUESTED, &recovery))
return ACTION_REPAIR;
return ACTION_RESYNC;
}
/*
* MD_RECOVERY_NEEDED or MD_RECOVERY_RUNNING is set, however, no
* sync_action is specified.
*/
return ACTION_IDLE;
}
enum sync_action md_sync_action_by_name(const 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;
}
const char *md_sync_action_name(enum sync_action action)
{
return action_name[action];
}
static ssize_t
action_show(struct mddev *mddev, char *page)
{

3
drivers/md/md.h
View File

@ -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(const char *page);
extern const char *md_sync_action_name(enum sync_action action);
extern void 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);