static void btt_submit_bio()

in btt.c [1443:1486]

• 39 lines of code
• 9 McCabe index (conditional complexity)

static void btt_submit_bio(struct bio *bio)
{
	struct bio_integrity_payload *bip = bio_integrity(bio);
	struct btt *btt = bio->bi_bdev->bd_disk->private_data;
	struct bvec_iter iter;
	unsigned long start;
	struct bio_vec bvec;
	int err = 0;
	bool do_acct;

	if (!bio_integrity_prep(bio))
		return;

	do_acct = blk_queue_io_stat(bio->bi_bdev->bd_disk->queue);
	if (do_acct)
		start = bio_start_io_acct(bio);
	bio_for_each_segment(bvec, bio, iter) {
		unsigned int len = bvec.bv_len;

		if (len > PAGE_SIZE || len < btt->sector_size ||
				len % btt->sector_size) {
			dev_err_ratelimited(&btt->nd_btt->dev,
				"unaligned bio segment (len: %d)\n", len);
			bio->bi_status = BLK_STS_IOERR;
			break;
		}

		err = btt_do_bvec(btt, bip, bvec.bv_page, len, bvec.bv_offset,
				  bio_op(bio), iter.bi_sector);
		if (err) {
			dev_err(&btt->nd_btt->dev,
					"io error in %s sector %lld, len %d,\n",
					(op_is_write(bio_op(bio))) ? "WRITE" :
					"READ",
					(unsigned long long) iter.bi_sector, len);
			bio->bi_status = errno_to_blk_status(err);
			break;
		}
	}
	if (do_acct)
		bio_end_io_acct(bio, start);

	bio_endio(bio);
}