Re: [PATCH v3 5/7] nvme-pci: add device coredump infrastructure

Minwoo Im
2019-05-13T07:46:12Z

> +static int nvme_get_telemetry_log_blocks(struct nvme_ctrl *ctrl, void *buf,
> + size_t bytes, loff_t offset)
> +{
> + loff_t pos = 0;
> + u32 chunk_size;
> +
> + if (check_mul_overflow(ctrl->max_hw_sectors, 512u, &chunk_size))
> + chunk_size = UINT_MAX;
> +
> + while (pos < bytes) {
> + size_t size = min_t(size_t, bytes - pos, chunk_size);
> + int ret;
> +
> + ret = nvme_get_log(ctrl, NVME_NSID_ALL,
> NVME_LOG_TELEMETRY_CTRL,
> + 0, buf + pos, size, offset + pos);
> + if (ret)
> + return ret;
> +
> + pos += size;
> + }
> +
> + return 0;
> +}
> +
> +static int nvme_get_telemetry_log(struct nvme_ctrl *ctrl,
> + struct sg_table *table, size_t bytes)
> +{
> + int n = sg_nents(table->sgl);
> + struct scatterlist *sg;
> + size_t offset = 0;
> + int i;
> +
> + for_each_sg(table->sgl, sg, n, i) {
> + struct page *page = sg_page(sg);
> + size_t size = min_t(int, bytes - offset, sg->length);
> + int ret;
> +
> + ret = nvme_get_telemetry_log_blocks(ctrl,
> page_address(page),
> + size, offset);
> + if (ret)
> + return ret;
> +
> + offset += size;
> + }
> +
> + return 0;
> +}

Can we have those two in nvme-core module instead of being in pci module?