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md: switch personalities to use md_submodule_head

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Remove the global list 'pers_list', and switch to use md_submodule_head,
which is managed by xarry. Prepare to unify registration and unregistration
for all sub modules.

Link: https://lore.kernel.org/linux-raid/20250215092225.2427977-5-yukuai1@huaweicloud.com
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
This commit is contained in:
Yu Kuai
2025-02-15 17:22:22 +08:00
committed by Yu Kuai
parent d3beb7c9c6
commit 3d44e1d157
7 changed files with 130 additions and 106 deletions
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70
drivers/md/raid5.c
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@@ -8954,9 +8954,13 @@ static void raid5_prepare_suspend(struct mddev *mddev)
static struct md_personality raid6_personality =
{
.name = "raid6",
.level = 6,
.owner = THIS_MODULE,
.head = {
.type = MD_PERSONALITY,
.id = ID_RAID6,
.name = "raid6",
.owner = THIS_MODULE,
},
.make_request = raid5_make_request,
.run = raid5_run,
.start = raid5_start,
@@ -8980,9 +8984,13 @@ static struct md_personality raid6_personality =
};
static struct md_personality raid5_personality =
{
.name = "raid5",
.level = 5,
.owner = THIS_MODULE,
.head = {
.type = MD_PERSONALITY,
.id = ID_RAID5,
.name = "raid5",
.owner = THIS_MODULE,
},
.make_request = raid5_make_request,
.run = raid5_run,
.start = raid5_start,
@@ -9007,9 +9015,13 @@ static struct md_personality raid5_personality =
static struct md_personality raid4_personality =
{
.name = "raid4",
.level = 4,
.owner = THIS_MODULE,
.head = {
.type = MD_PERSONALITY,
.id = ID_RAID4,
.name = "raid4",
.owner = THIS_MODULE,
},
.make_request = raid5_make_request,
.run = raid5_run,
.start = raid5_start,
@@ -9045,21 +9057,39 @@ static int __init raid5_init(void)
"md/raid5:prepare",
raid456_cpu_up_prepare,
raid456_cpu_dead);
if (ret) {
destroy_workqueue(raid5_wq);
return ret;
}
register_md_personality(&raid6_personality);
register_md_personality(&raid5_personality);
register_md_personality(&raid4_personality);
if (ret)
goto err_destroy_wq;
ret = register_md_submodule(&raid6_personality.head);
if (ret)
goto err_cpuhp_remove;
ret = register_md_submodule(&raid5_personality.head);
if (ret)
goto err_unregister_raid6;
ret = register_md_submodule(&raid4_personality.head);
if (ret)
goto err_unregister_raid5;
return 0;
err_unregister_raid5:
unregister_md_submodule(&raid5_personality.head);
err_unregister_raid6:
unregister_md_submodule(&raid6_personality.head);
err_cpuhp_remove:
cpuhp_remove_multi_state(CPUHP_MD_RAID5_PREPARE);
err_destroy_wq:
destroy_workqueue(raid5_wq);
return ret;
}
static void raid5_exit(void)
static void __exit raid5_exit(void)
{
unregister_md_personality(&raid6_personality);
unregister_md_personality(&raid5_personality);
unregister_md_personality(&raid4_personality);
unregister_md_submodule(&raid6_personality.head);
unregister_md_submodule(&raid5_personality.head);
unregister_md_submodule(&raid4_personality.head);
cpuhp_remove_multi_state(CPUHP_MD_RAID5_PREPARE);
destroy_workqueue(raid5_wq);
}