From e99dc367b3aafb1ce2d5d92e94834d07b299e1d7 Mon Sep 17 00:00:00 2001 From: Lars Ellenberg Date: Mon, 24 Jan 2011 14:58:39 +0100 Subject: drbd: kill dead code This code became obsolete and unused last December with drbd: bitmap keep track of changes vs on-disk bitmap Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg --- drivers/block/drbd/drbd_actlog.c | 93 ---------------------------------------- 1 file changed, 93 deletions(-) (limited to 'drivers/block') diff --git a/drivers/block/drbd/drbd_actlog.c b/drivers/block/drbd/drbd_actlog.c index 090fc2c..a605079 100644 --- a/drivers/block/drbd/drbd_actlog.c +++ b/drivers/block/drbd/drbd_actlog.c @@ -569,99 +569,6 @@ static void atodb_endio(struct bio *bio, int error) put_ldev(mdev); } -/* sector to word */ -#define S2W(s) ((s)<<(BM_EXT_SHIFT-BM_BLOCK_SHIFT-LN2_BPL)) - -/* activity log to on disk bitmap -- prepare bio unless that sector - * is already covered by previously prepared bios */ -static int atodb_prepare_unless_covered(struct drbd_conf *mdev, - struct bio **bios, - unsigned int enr, - struct drbd_atodb_wait *wc) __must_hold(local) -{ - struct bio *bio; - struct page *page; - sector_t on_disk_sector; - unsigned int page_offset = PAGE_SIZE; - int offset; - int i = 0; - int err = -ENOMEM; - - /* We always write aligned, full 4k blocks, - * so we can ignore the logical_block_size (for now) */ - enr &= ~7U; - on_disk_sector = enr + mdev->ldev->md.md_offset - + mdev->ldev->md.bm_offset; - - D_ASSERT(!(on_disk_sector & 7U)); - - /* Check if that enr is already covered by an already created bio. - * Caution, bios[] is not NULL terminated, - * but only initialized to all NULL. - * For completely scattered activity log, - * the last invocation iterates over all bios, - * and finds the last NULL entry. - */ - while ((bio = bios[i])) { - if (bio->bi_sector == on_disk_sector) - return 0; - i++; - } - /* bios[i] == NULL, the next not yet used slot */ - - /* GFP_KERNEL, we are not in the write-out path */ - bio = bio_alloc(GFP_KERNEL, 1); - if (bio == NULL) - return -ENOMEM; - - if (i > 0) { - const struct bio_vec *prev_bv = bios[i-1]->bi_io_vec; - page_offset = prev_bv->bv_offset + prev_bv->bv_len; - page = prev_bv->bv_page; - } - if (page_offset == PAGE_SIZE) { - page = alloc_page(__GFP_HIGHMEM); - if (page == NULL) - goto out_bio_put; - page_offset = 0; - } else { - get_page(page); - } - - offset = S2W(enr); - drbd_bm_get_lel(mdev, offset, - min_t(size_t, S2W(8), drbd_bm_words(mdev) - offset), - kmap(page) + page_offset); - kunmap(page); - - bio->bi_private = wc; - bio->bi_end_io = atodb_endio; - bio->bi_bdev = mdev->ldev->md_bdev; - bio->bi_sector = on_disk_sector; - - if (bio_add_page(bio, page, 4096, page_offset) != 4096) - goto out_put_page; - - atomic_inc(&wc->count); - /* we already know that we may do this... - * get_ldev_if_state(mdev,D_ATTACHING); - * just get the extra reference, so that the local_cnt reflects - * the number of pending IO requests DRBD at its backing device. - */ - atomic_inc(&mdev->local_cnt); - - bios[i] = bio; - - return 0; - -out_put_page: - err = -EINVAL; - put_page(page); -out_bio_put: - bio_put(bio); - return err; -} - /** * drbd_al_apply_to_bm() - Sets the bitmap to diry(1) where covered ba active AL extents * @mdev: DRBD device. -- cgit v1.1