int
get_alua_info(int fd)
{
int rc;
int tpg;
rc = get_target_port_group_support(fd);
if (rc < 0)
return -ALUA_PRIO_TPGS_FAILED;
if (rc == TPGS_NONE)
return -ALUA_PRIO_NOT_SUPPORTED;
tpg = get_target_port_group(fd);
if (tpg < 0)
return -ALUA_PRIO_RTPG_FAILED;
condlog(3, "reported target port group is %i", tpg);
rc = get_asymmetric_access_state(fd, tpg);
if (rc < 0)
return -ALUA_PRIO_GETAAS_FAILED;
condlog(3, "aas = %02x [%s]%s", rc, aas_print_string(rc),
(rc & 0x80) ? " [preferred]" : "");
return rc;
}
void
detect_prio(struct path * pp)
{
struct prio *p = &pp->prio;
if (get_target_port_group_support(pp->fd) > 0)
prio_get(p, PRIO_ALUA, DEFAULT_PRIO_ARGS);
}
void
detect_prio(struct config *conf, struct path * pp)
{
int ret;
struct prio *p = &pp->prio;
int tpgs = 0;
unsigned int timeout = conf->checker_timeout;
char buff[512];
char *default_prio = PRIO_ALUA;
if ((tpgs = get_target_port_group_support(pp->fd, timeout)) <= 0)
return;
pp->tpgs = tpgs;
ret = get_target_port_group(pp, timeout);
if (ret < 0)
return;
if (get_asymmetric_access_state(pp->fd, ret, timeout) < 0)
return;
if (sysfs_get_asymmetric_access_state(pp, buff, 512) >= 0)
default_prio = PRIO_SYSFS;
prio_get(conf->multipath_dir, p, default_prio, DEFAULT_PRIO_ARGS);
}
int select_prio(struct config *conf, struct path *pp)
{
char *origin;
struct mpentry * mpe;
struct prio * p = &pp->prio;
if (pp->detect_prio == DETECT_PRIO_ON) {
detect_prio(conf, pp);
if (prio_selected(p)) {
origin = "(setting: array autodetected)";
goto out;
}
}
mpe = find_mpe(conf->mptable, pp->wwid);
set_prio(conf->multipath_dir, mpe, "(setting: multipath.conf multipaths section)");
set_prio(conf->multipath_dir, conf->overrides, "(setting: multipath.conf overrides section)");
set_prio(conf->multipath_dir, pp->hwe, "(setting: array configuration)");
set_prio(conf->multipath_dir, conf, "(setting: multipath.conf defaults/devices section)");
prio_get(conf->multipath_dir, p, DEFAULT_PRIO, DEFAULT_PRIO_ARGS);
origin = "(setting: multipath internal)";
out:
/*
* fetch tpgs mode for alua, if its not already obtained
*/
if (!strncmp(prio_name(p), PRIO_ALUA, PRIO_NAME_LEN)) {
int tpgs = 0;
unsigned int timeout = conf->checker_timeout;
if(!pp->tpgs &&
(tpgs = get_target_port_group_support(pp->fd, timeout)) >= 0)
pp->tpgs = tpgs;
}
condlog(3, "%s: prio = %s %s", pp->dev, prio_name(p), origin);
condlog(3, "%s: prio args = \"%s\" %s", pp->dev, prio_args(p), origin);
return 0;
}
