static int write_sb_page(struct bitmap *bitmap, struct page *page, int wait)
{
mdk_rdev_t *rdev;
struct list_head *tmp;
mddev_t *mddev = bitmap->mddev;
ITERATE_RDEV(mddev, rdev, tmp)
if (test_bit(In_sync, &rdev->flags)
&& !test_bit(Faulty, &rdev->flags)) {
int size = PAGE_SIZE;
if (page->index == bitmap->file_pages-1)
size = roundup(bitmap->last_page_size,
bdev_hardsect_size(rdev->bdev));
/* Just make sure we aren't corrupting data or
* metadata
*/
if (bitmap->offset < 0) {
/* DATA BITMAP METADATA */
if (bitmap->offset
+ page->index * (PAGE_SIZE/512)
+ size/512 > 0)
/* bitmap runs in to metadata */
return -EINVAL;
if (rdev->data_offset + mddev->size*2
> rdev->sb_offset*2 + bitmap->offset)
/* data runs in to bitmap */
return -EINVAL;
} else if (rdev->sb_offset*2 < rdev->data_offset) {
/* METADATA BITMAP DATA */
if (rdev->sb_offset*2
+ bitmap->offset
+ page->index*(PAGE_SIZE/512) + size/512
> rdev->data_offset)
/* bitmap runs in to data */
return -EINVAL;
} else {
/* DATA METADATA BITMAP - no problems */
}
md_super_write(mddev, rdev,
(rdev->sb_offset<<1) + bitmap->offset
+ page->index * (PAGE_SIZE/512),
size,
page);
}
if (wait)
md_super_wait(mddev);
return 0;
}
static int write_sb_page(mddev_t *mddev, long offset, struct page *page, int wait)
{
mdk_rdev_t *rdev;
struct list_head *tmp;
ITERATE_RDEV(mddev, rdev, tmp)
if (test_bit(In_sync, &rdev->flags)
&& !test_bit(Faulty, &rdev->flags))
md_super_write(mddev, rdev,
(rdev->sb_offset<<1) + offset
+ page->index * (PAGE_SIZE/512),
PAGE_SIZE,
page);
if (wait)
md_super_wait(mddev);
return 0;
}
static int write_sb_page(mddev_t *mddev, long offset, struct page *page, int wait)
{
mdk_rdev_t *rdev;
rcu_read_lock();
rdev_for_each_rcu(rdev, mddev)
if (test_bit(In_sync, &rdev->flags)
&& !test_bit(Faulty, &rdev->flags))
md_super_write(mddev, rdev,
(rdev->sb_offset<<1) + offset
+ page->index * (PAGE_SIZE/512),
PAGE_SIZE,
page);
rcu_read_unlock();
if (wait)
md_super_wait(mddev);
return 0;
}
static int write_sb_page(struct bitmap *bitmap, struct page *page, int wait)
{
mdk_rdev_t *rdev;
struct list_head *tmp;
mddev_t *mddev = bitmap->mddev;
ITERATE_RDEV(mddev, rdev, tmp)
if (test_bit(In_sync, &rdev->flags)
&& !test_bit(Faulty, &rdev->flags)) {
int size = PAGE_SIZE;
if (page->index == bitmap->file_pages-1)
size = roundup(bitmap->last_page_size,
bdev_hardsect_size(rdev->bdev));
md_super_write(mddev, rdev,
(rdev->sb_offset<<1) + bitmap->offset
+ page->index * (PAGE_SIZE/512),
size,
page);
}
if (wait)
md_super_wait(mddev);
return 0;
}
