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md/md-bitmap: introduce struct bitmap_operations

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The structure is empty for now, and will be used in later patches to
merge in bitmap operations, so that bitmap implementation won't be
exposed.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20240826074452.1490072-12-yukuai1@huaweicloud.com
Signed-off-by: Song Liu <song@kernel.org>
This commit is contained in:
Yu Kuai 2024-08-26 15:44:21 +08:00 committed by Song Liu
parent 27832ad3f7
commit 7add9db6ba
4 changed files with 14 additions and 0 deletions
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8
drivers/md/md-bitmap.c
View File

@ -2714,3 +2714,11 @@ const struct attribute_group md_bitmap_group = {
.name = "bitmap",
.attrs = md_bitmap_attrs,
};
static struct bitmap_operations bitmap_ops = {
};
void mddev_set_bitmap_ops(struct mddev *mddev)
{
mddev->bitmap_ops = &bitmap_ops;
}

4
drivers/md/md-bitmap.h
View File

@ -246,7 +246,11 @@ struct md_bitmap_stats {
struct file *file;
};
struct bitmap_operations {
};
/* the bitmap API */
void mddev_set_bitmap_ops(struct mddev *mddev);
/* these are used only by md/bitmap */
struct bitmap *md_bitmap_create(struct mddev *mddev, int slot);

1
drivers/md/md.c
View File

@ -772,6 +772,7 @@ int mddev_init(struct mddev *mddev)
mddev->resync_min = 0;
mddev->resync_max = MaxSector;
mddev->level = LEVEL_NONE;
mddev_set_bitmap_ops(mddev);
INIT_WORK(&mddev->sync_work, md_start_sync);
INIT_WORK(&mddev->del_work, mddev_delayed_delete);

1
drivers/md/md.h
View File

@ -536,6 +536,7 @@ struct mddev {
int sync_checkers; /* # of threads checking writes_pending */
struct bitmap *bitmap; /* the bitmap for the device */
struct bitmap_operations *bitmap_ops;
struct {
struct file *file; /* the bitmap file */
loff_t offset; /* offset from superblock of