C++ (Cpp) blkid_topology_get_minimum_io_size Examples

Example #1

File: main_grow.c Project: BetaXOi/gfs2-utils

static lgfs2_rgrps_t rgrps_init(struct gfs2_sbd *sdp)
{
	int ret;
	int error;
	uint64_t al_base = 0;
	uint64_t al_off = 0;
	struct stat st;
	blkid_probe pr = blkid_new_probe();
	if (pr == NULL || blkid_probe_set_device(pr, sdp->device_fd, 0, 0) != 0
	               || blkid_probe_enable_superblocks(pr, TRUE) != 0
	               || blkid_probe_enable_partitions(pr, TRUE) != 0) {
		fprintf(stderr, _("Failed to create probe\n"));
		return NULL;
	}

	error = fstat(sdp->device_fd, &st);
	if (error < 0) {
		fprintf(stderr, _("fstat failed\n"));
		return NULL;
	}

	if (!S_ISREG(st.st_mode) && blkid_probe_enable_topology(pr, TRUE) != 0) {
		fprintf(stderr, _("Failed to create probe\n"));
		return NULL;
	}

	ret = blkid_do_fullprobe(pr);
	if (ret == 0 && !S_ISREG(st.st_mode)) {
		blkid_topology tp = blkid_probe_get_topology(pr);
		if (tp != NULL) {
			unsigned long min_io_sz = blkid_topology_get_minimum_io_size(tp);
			unsigned long opt_io_sz = blkid_topology_get_optimal_io_size(tp);
			unsigned long phy_sector_sz = blkid_topology_get_physical_sector_size(tp);
			if ((min_io_sz > phy_sector_sz) &&
			    (opt_io_sz > phy_sector_sz)) {
					al_base = opt_io_sz / sdp->bsize;
					al_off = min_io_sz / sdp->bsize;
			}

		}
	}

	blkid_free_probe(pr);
	return lgfs2_rgrps_init(sdp, al_base, al_off);
}

Example #2

File: topology.c Project: 0xAX/util-linux

int main(int argc, char *argv[])
{
	int rc;
	char *devname;
	blkid_probe pr;
	blkid_topology tp;

	if (argc < 2) {
		fprintf(stderr, "usage: %s <device>  "
				"-- prints topology details about the device\n",
				program_invocation_short_name);
		return EXIT_FAILURE;
	}

	devname = argv[1];
	pr = blkid_new_probe_from_filename(devname);
	if (!pr)
		err(EXIT_FAILURE, "%s: failed to create a new libblkid probe",
				devname);
	/*
	 * Binary interface
	 */
	tp = blkid_probe_get_topology(pr);
	if (tp) {
		printf("----- binary interface:\n");
		printf("\talignment offset     : %lu\n",
				blkid_topology_get_alignment_offset(tp));
		printf("\tminimum io size      : %lu\n",
				blkid_topology_get_minimum_io_size(tp));
		printf("\toptimal io size      : %lu\n",
				blkid_topology_get_optimal_io_size(tp));
		printf("\tlogical sector size  : %lu\n",
				blkid_topology_get_logical_sector_size(tp));
		printf("\tphysical sector size : %lu\n",
				blkid_topology_get_physical_sector_size(tp));
	}

	/*
	 * NAME=value interface
	 */

	/* enable topology probing */
	blkid_probe_enable_topology(pr, TRUE);

	/* disable superblocks probing (enabled by default) */
	blkid_probe_enable_superblocks(pr, FALSE);

	rc = blkid_do_fullprobe(pr);
	if (rc == -1)
		errx(EXIT_FAILURE, "%s: blkid_do_fullprobe() failed", devname);
	else if (rc == 1)
		warnx("%s: missing topology information", devname);
	else {
		int i, nvals = blkid_probe_numof_values(pr);

		printf("----- NAME=value interface (values: %d):\n", nvals);

		for (i = 0; i < nvals; i++) {
			const char *name, *data;

			blkid_probe_get_value(pr, i, &name, &data, NULL);
			printf("\t%s = %s\n", name, data);
		}
	}

	blkid_free_probe(pr);
	return EXIT_SUCCESS;
}