示例#1
0
static blk_qc_t pmem_make_request(struct request_queue *q, struct bio *bio)
{
	blk_status_t rc = 0;
	bool do_acct;
	unsigned long start;
	struct bio_vec bvec;
	struct bvec_iter iter;
	struct pmem_device *pmem = q->queuedata;
	struct nd_region *nd_region = to_region(pmem);

	if (bio->bi_opf & REQ_PREFLUSH)
		nvdimm_flush(nd_region);

	do_acct = nd_iostat_start(bio, &start);
	bio_for_each_segment(bvec, bio, iter) {
		rc = pmem_do_bvec(pmem, bvec.bv_page, bvec.bv_len,
				bvec.bv_offset, bio_op(bio), iter.bi_sector);
		if (rc) {
			bio->bi_status = rc;
			break;
		}
	}
示例#2
0
文件: claim.c 项目: AK101111/linux
static int nsio_rw_bytes(struct nd_namespace_common *ndns,
		resource_size_t offset, void *buf, size_t size, int rw)
{
	struct nd_namespace_io *nsio = to_nd_namespace_io(&ndns->dev);

	if (unlikely(offset + size > nsio->size)) {
		dev_WARN_ONCE(&ndns->dev, 1, "request out of range\n");
		return -EFAULT;
	}

	if (rw == READ) {
		unsigned int sz_align = ALIGN(size + (offset & (512 - 1)), 512);

		if (unlikely(is_bad_pmem(&nsio->bb, offset / 512, sz_align)))
			return -EIO;
		return memcpy_from_pmem(buf, nsio->addr + offset, size);
	} else {
		memcpy_to_pmem(nsio->addr + offset, buf, size);
		nvdimm_flush(to_nd_region(ndns->dev.parent));
	}

	return 0;
}