dm-flakey.c (4f2c0a4acffbec01079c28f839422e64ddeff004) dm-flakey.c (f50714b57aecb6b3dc81d578e295f86d9c73f078)
1/*
2 * Copyright (C) 2003 Sistina Software (UK) Limited.
3 * Copyright (C) 2004, 2010-2011 Red Hat, Inc. All rights reserved.
4 *
5 * This file is released under the GPL.
6 */
7
8#include <linux/device-mapper.h>

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298 return;
299
300 /*
301 * Overwrite the Nth byte of the bio's data, on whichever page
302 * it falls.
303 */
304 bio_for_each_segment(bvec, bio, iter) {
305 if (bio_iter_len(bio, iter) > corrupt_bio_byte) {
1/*
2 * Copyright (C) 2003 Sistina Software (UK) Limited.
3 * Copyright (C) 2004, 2010-2011 Red Hat, Inc. All rights reserved.
4 *
5 * This file is released under the GPL.
6 */
7
8#include <linux/device-mapper.h>

--- 289 unchanged lines hidden (view full) ---

298 return;
299
300 /*
301 * Overwrite the Nth byte of the bio's data, on whichever page
302 * it falls.
303 */
304 bio_for_each_segment(bvec, bio, iter) {
305 if (bio_iter_len(bio, iter) > corrupt_bio_byte) {
306 char *segment = (page_address(bio_iter_page(bio, iter))
307 + bio_iter_offset(bio, iter));
306 char *segment;
307 struct page *page = bio_iter_page(bio, iter);
308 if (unlikely(page == ZERO_PAGE(0)))
309 break;
310 segment = (page_address(page) + bio_iter_offset(bio, iter));
308 segment[corrupt_bio_byte] = fc->corrupt_bio_value;
309 DMDEBUG("Corrupting data bio=%p by writing %u to byte %u "
310 "(rw=%c bi_opf=%u bi_sector=%llu size=%u)\n",
311 bio, fc->corrupt_bio_value, fc->corrupt_bio_byte,
312 (bio_data_dir(bio) == WRITE) ? 'w' : 'r', bio->bi_opf,
313 (unsigned long long)bio->bi_iter.bi_sector, bio->bi_iter.bi_size);
314 break;
315 }

--- 208 unchanged lines hidden --- 		311 segment[corrupt_bio_byte] = fc->corrupt_bio_value;
312 DMDEBUG("Corrupting data bio=%p by writing %u to byte %u "
313 "(rw=%c bi_opf=%u bi_sector=%llu size=%u)\n",
314 bio, fc->corrupt_bio_value, fc->corrupt_bio_byte,
315 (bio_data_dir(bio) == WRITE) ? 'w' : 'r', bio->bi_opf,
316 (unsigned long long)bio->bi_iter.bi_sector, bio->bi_iter.bi_size);
317 break;
318 }

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