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md: add a new mddev field 'bitmap_id'

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Prepare to store the bitmap id selected by user, also refactor
mddev_set_bitmap_ops a bit in case the value is invalid.

Link: https://lore.kernel.org/linux-raid/20250829080426.1441678-5-yukuai1@huaweicloud.com
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Li Nan <linan122@huawei.com>
Reviewed-by: Xiao Ni <xni@redhat.com>
This commit is contained in:
Yu Kuai
2025-08-29 16:04:19 +08:00
parent ac9dad8faa
commit 300bffa870
2 changed files with 33 additions and 6 deletions
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2
drivers/md/md.h
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@@ -40,6 +40,7 @@ enum md_submodule_id {
ID_CLUSTER,
ID_BITMAP,
ID_LLBITMAP, /* TODO */
ID_BITMAP_NONE,
};
struct md_submodule_head {
@@ -565,6 +566,7 @@ struct mddev {
struct percpu_ref writes_pending;
int sync_checkers; /* # of threads checking writes_pending */
enum md_submodule_id bitmap_id;
void *bitmap; /* the bitmap for the device */
struct bitmap_operations *bitmap_ops;
struct {