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| author | Jonathan Brassow <jbrassow@redhat.com> | 2011-01-14 09:14:34 +1100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2011-01-14 09:14:34 +1100 |
| commit | a6ff7e089c7fca813c956ccbed824087e89a3a49 (patch) | |
| tree | 6537f72a2431c30601736676e9b1f89a7f1fe52e /drivers/md/bitmap.c | |
| parent | ccebd4c4159462c96397ae9af9c667bb394d7b70 (diff) | |
| download | kernel_samsung_smdk4412-a6ff7e089c7fca813c956ccbed824087e89a3a49.zip kernel_samsung_smdk4412-a6ff7e089c7fca813c956ccbed824087e89a3a49.tar.gz kernel_samsung_smdk4412-a6ff7e089c7fca813c956ccbed824087e89a3a49.tar.bz2 | |
md: separate meta and data devs
Allow the metadata to be on a separate device from the
data.
This doesn't mean the data and metadata will by on separate
physical devices - it simply gives device-mapper and userspace
tools more flexibility.
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/bitmap.c')
| -rw-r--r-- | drivers/md/bitmap.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index 1977765..6cf5871 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -264,14 +264,18 @@ static mdk_rdev_t *next_active_rdev(mdk_rdev_t *rdev, mddev_t *mddev) static int write_sb_page(struct bitmap *bitmap, struct page *page, int wait) { mdk_rdev_t *rdev = NULL; + struct block_device *bdev; mddev_t *mddev = bitmap->mddev; while ((rdev = next_active_rdev(rdev, mddev)) != NULL) { int size = PAGE_SIZE; loff_t offset = mddev->bitmap_info.offset; + + bdev = (rdev->meta_bdev) ? rdev->meta_bdev : rdev->bdev; + if (page->index == bitmap->file_pages-1) size = roundup(bitmap->last_page_size, - bdev_logical_block_size(rdev->bdev)); + bdev_logical_block_size(bdev)); /* Just make sure we aren't corrupting data or * metadata */ |