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); }
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; }