static int is_ssd(const char *file)
{
blkid_probe probe;
char wholedisk[32];
char sysfs_path[PATH_MAX];
dev_t devno;
int fd;
char rotational;
int ret;
probe = blkid_new_probe_from_filename(file);
if (!probe)
return 0;
/* Device number of this disk (possibly a partition) */
devno = blkid_probe_get_devno(probe);
if (!devno) {
blkid_free_probe(probe);
return 0;
}
/* Get whole disk name (not full path) for this devno */
ret = blkid_devno_to_wholedisk(devno,
wholedisk, sizeof(wholedisk), NULL);
if (ret) {
blkid_free_probe(probe);
return 0;
}
snprintf(sysfs_path, PATH_MAX, "/sys/block/%s/queue/rotational",
wholedisk);
blkid_free_probe(probe);
fd = open(sysfs_path, O_RDONLY);
if (fd < 0) {
return 0;
}
if (read(fd, &rotational, sizeof(char)) < sizeof(char)) {
close(fd);
return 0;
}
close(fd);
return !atoi((const char *)&rotational);
}
uint32_t size; /* stripe unit 512-byte blocks */
uint32_t width; /* the number of stripe members or RAID data disks */
} evms_stripe_info;
static int is_evms_device(dev_t devno)
{
if (major(devno) == EVMS_MAJOR)
return 1;
return blkid_driver_has_major("evms", major(devno));
}
static int probe_evms_tp(blkid_probe pr,
const struct blkid_idmag *mag __attribute__((__unused__)))
{
struct evms_stripe_info evms;
dev_t devno = blkid_probe_get_devno(pr);
if (!devno)
goto nothing; /* probably not a block device */
if (!is_evms_device(devno))
goto nothing;
memset(&evms, 0, sizeof(evms));
if (ioctl(pr->fd, EVMS_GET_STRIPE_INFO, &evms))
goto nothing;
blkid_topology_set_minimum_io_size(pr, evms.size << 9);
blkid_topology_set_optimal_io_size(pr, (evms.size * evms.width) << 9);
