dm.c (040f04bd2e825f1d80b14a0e0ac3d830339eb779) dm.c (47d951023a242bb159534573a4a76fef9a31dc9b)
1/*
2 * Copyright (C) 2001, 2002 Sistina Software (UK) Limited.
3 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
4 *
5 * This file is released under the GPL.
6 */
7
8#include "dm-core.h"

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1417
1418 /*
1419 * Use an on-stack bio for this, it's safe since we don't
1420 * need to reference it after submit. It's just used as
1421 * the basis for the clone(s).
1422 */
1423 bio_init(&flush_bio, NULL, 0);
1424 flush_bio.bi_opf = REQ_OP_WRITE | REQ_PREFLUSH | REQ_SYNC;
1/*
2 * Copyright (C) 2001, 2002 Sistina Software (UK) Limited.
3 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
4 *
5 * This file is released under the GPL.
6 */
7
8#include "dm-core.h"

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1417
1418 /*
1419 * Use an on-stack bio for this, it's safe since we don't
1420 * need to reference it after submit. It's just used as
1421 * the basis for the clone(s).
1422 */
1423 bio_init(&flush_bio, NULL, 0);
1424 flush_bio.bi_opf = REQ_OP_WRITE | REQ_PREFLUSH | REQ_SYNC;
1425 flush_bio.bi_disk = ci->io->md->disk;
1426 bio_associate_blkg(&flush_bio);
1427
1425 ci->bio = &flush_bio;
1426 ci->sector_count = 0;
1427
1428 ci->bio = &flush_bio;
1429 ci->sector_count = 0;
1430
1428 /*
1429 * Empty flush uses a statically initialized bio, as the base for
1430 * cloning. However, blkg association requires that a bdev is
1431 * associated with a gendisk, which doesn't happen until the bdev is
1432 * opened. So, blkg association is done at issue time of the flush
1433 * rather than when the device is created in alloc_dev().
1434 */
1435 bio_set_dev(ci->bio, ci->io->md->bdev);
1436
1437 BUG_ON(bio_has_data(ci->bio));
1438 while ((ti = dm_table_get_target(ci->map, target_nr++)))
1439 __send_duplicate_bios(ci, ti, ti->num_flush_bios, NULL);
1440
1441 bio_uninit(ci->bio);
1442 return 0;
1443}
1444

--- 1673 unchanged lines hidden --- 		1431 BUG_ON(bio_has_data(ci->bio));
1432 while ((ti = dm_table_get_target(ci->map, target_nr++)))
1433 __send_duplicate_bios(ci, ti, ti->num_flush_bios, NULL);
1434
1435 bio_uninit(ci->bio);
1436 return 0;
1437}
1438

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