1 // SPDX-License-Identifier: GPL-2.0
19 		sector += bdev->bd_start_sect;  in bio_discard_limit()
29 		return granularity_aligned_sector - sector;  in bio_discard_limit()
50 	bio->bi_iter.bi_sector = *sector;  in blk_alloc_discard_bio()
51 	bio->bi_iter.bi_size = bio_sects << SECTOR_SHIFT;  in blk_alloc_discard_bio()
53 	*nr_sects -= bio_sects;  in blk_alloc_discard_bio()
76  * blkdev_issue_discard - queue a discard
96 		if (ret == -EOPNOTSUPP)  in blkdev_issue_discard()
108 	sector_t bs_mask = (bdev_logical_block_size(bdev) >> 9) - 1;  in bio_write_zeroes_limit()
119  * queue limit is likely to change at runtime.
123 		struct bio **biop, unsigned flags, sector_t limit)  in __blkdev_issue_write_zeroes()  argument
127 		unsigned int len = min(nr_sects, limit);  in __blkdev_issue_write_zeroes()  local
135 		bio->bi_iter.bi_sector = sector;  in __blkdev_issue_write_zeroes()
137 			bio->bi_opf |= REQ_NOUNMAP;  in __blkdev_issue_write_zeroes()
139 		bio->bi_iter.bi_size = len << SECTOR_SHIFT;  in __blkdev_issue_write_zeroes()
142 		nr_sects -= len;  in __blkdev_issue_write_zeroes()
143 		sector += len;  in __blkdev_issue_write_zeroes()
151 	sector_t limit = bio_write_zeroes_limit(bdev);  in blkdev_issue_write_zeroes()  local
158 			flags, limit);  in blkdev_issue_write_zeroes()
164 			return -EINTR;  in blkdev_issue_write_zeroes()
172 	 * For some devices there is no non-destructive way to verify whether  in blkdev_issue_write_zeroes()
178 		return -EOPNOTSUPP;  in blkdev_issue_write_zeroes()
204 		bio->bi_iter.bi_sector = sector;  in __blkdev_issue_zero_pages()
211 			unsigned int len, added;  in __blkdev_issue_zero_pages()  local
213 			len = min_t(sector_t,  in __blkdev_issue_zero_pages()
215 			added = bio_add_page(bio, ZERO_PAGE(0), len, 0);  in __blkdev_issue_zero_pages()
216 			if (added < len)  in __blkdev_issue_zero_pages()
218 			nr_sects -= added >> SECTOR_SHIFT;  in __blkdev_issue_zero_pages()
235 		return -EOPNOTSUPP;  in blkdev_issue_zero_pages()
244 			return -EINTR;  in blkdev_issue_zero_pages()
255  * __blkdev_issue_zeroout - generate number of zero filed write bios
264  *  Zero-fill a block range, either using hardware offload or by explicitly
271  *  -EOPNOTSUPP if no explicit hardware offload for zeroing is provided.
277 	sector_t limit = bio_write_zeroes_limit(bdev);  in __blkdev_issue_zeroout()  local
280 		return -EPERM;  in __blkdev_issue_zeroout()
282 	if (limit) {  in __blkdev_issue_zeroout()
284 				gfp_mask, biop, flags, limit);  in __blkdev_issue_zeroout()
287 			return -EOPNOTSUPP;  in __blkdev_issue_zeroout()
296  * blkdev_issue_zeroout - zero-fill a block range
304  *  Zero-fill a block range, either using hardware offload or by explicitly
313 	if ((sector | nr_sects) & ((bdev_logical_block_size(bdev) >> 9) - 1))  in blkdev_issue_zeroout()
314 		return -EINVAL;  in blkdev_issue_zeroout()
316 		return -EPERM;  in blkdev_issue_zeroout()
321 		if (ret != -EOPNOTSUPP)  in blkdev_issue_zeroout()
332 	sector_t bs_mask = (bdev_logical_block_size(bdev) >> 9) - 1;  in blkdev_issue_secure_erase()
338 	/* make sure that "len << SECTOR_SHIFT" doesn't overflow */  in blkdev_issue_secure_erase()
344 		return -EOPNOTSUPP;  in blkdev_issue_secure_erase()
346 		return -EINVAL;  in blkdev_issue_secure_erase()
348 		return -EPERM;  in blkdev_issue_secure_erase()
352 		unsigned int len = min_t(sector_t, nr_sects, max_sectors);  in blkdev_issue_secure_erase()  local
355 		bio->bi_iter.bi_sector = sector;  in blkdev_issue_secure_erase()
356 		bio->bi_iter.bi_size = len << SECTOR_SHIFT;  in blkdev_issue_secure_erase()
358 		sector += len;  in blkdev_issue_secure_erase()
359 		nr_sects -= len;  in blkdev_issue_secure_erase()