/*
* init_zfd_devs() drives the device-tree configuration of the zone fd devices.
* The general strategy is to use the libdevice (devctl) interfaces to
* instantiate 3 new zone fd nodes. We do a lot of sanity checking, and
* are careful to reuse a dev if one exists.
*
* Once the devices are in the device tree, we kick devfsadm via
* di_devlink_init() to ensure that the appropriate symlinks (to the master and
* slave fd devices) are placed in /dev in the global zone.
*/
static int
init_zfd_dev(zlog_t *zlogp, devctl_hdl_t bus_hdl, int id)
{
int rv = -1;
devctl_ddef_t ddef_hdl = NULL;
devctl_hdl_t dev_hdl = NULL;
if ((ddef_hdl = devctl_ddef_alloc("zfd", 0)) == NULL) {
zerror(zlogp, B_TRUE, "failed to allocate ddef handle");
goto error;
}
/*
* Set four properties on this node; the first is the name of the
* zone; the second is a flag which lets pseudo know that it is
* OK to automatically allocate an instance # for this device;
* the third tells the device framework not to auto-detach this
* node-- we need the node to still be there when we ask devfsadmd
* to make links, and when we need to open it.
*/
if (devctl_ddef_string(ddef_hdl, "zfd_zname", zone_name) == -1) {
zerror(zlogp, B_TRUE, "failed to create zfd_zname property");
goto error;
}
if (devctl_ddef_int(ddef_hdl, "zfd_id", id) == -1) {
zerror(zlogp, B_TRUE, "failed to create zfd_id property");
goto error;
}
if (devctl_ddef_int(ddef_hdl, "auto-assign-instance", 1) == -1) {
zerror(zlogp, B_TRUE, "failed to create auto-assign-instance "
"property");
goto error;
}
if (devctl_ddef_int(ddef_hdl, "ddi-no-autodetach", 1) == -1) {
zerror(zlogp, B_TRUE, "failed to create ddi-no-auto-detach "
"property");
goto error;
}
if (devctl_bus_dev_create(bus_hdl, ddef_hdl, 0, &dev_hdl) == -1) {
zerror(zlogp, B_TRUE, "failed to create zfd node");
goto error;
}
rv = 0;
error:
if (ddef_hdl)
devctl_ddef_free(ddef_hdl);
if (dev_hdl)
devctl_release(dev_hdl);
return (rv);
}
/*
* init_console_dev() drives the device-tree configuration of the zone
* console device. The general strategy is to use the libdevice (devctl)
* interfaces to instantiate a new zone console node. We do a lot of
* sanity checking, and are careful to reuse a console if one exists.
*
* Once the device is in the device tree, we kick devfsadm via di_devlink_init()
* to ensure that the appropriate symlinks (to the master and slave console
* devices) are placed in /dev in the global zone.
*/
static int
init_console_dev(zlog_t *zlogp)
{
char conspath[MAXPATHLEN];
devctl_hdl_t bus_hdl = NULL;
devctl_hdl_t dev_hdl = NULL;
devctl_ddef_t ddef_hdl = NULL;
di_devlink_handle_t dl = NULL;
int rv = -1;
int ndevs;
int masterfd;
int slavefd;
int i;
/*
* Don't re-setup console if it is working and ready already; just
* skip ahead to making devlinks, which we do for sanity's sake.
*/
ndevs = count_console_devs(zlogp);
if (ndevs == 1) {
goto devlinks;
} else if (ndevs > 1 || ndevs == -1) {
/*
* For now, this seems like a reasonable but harsh punishment.
* If needed, we could try to get clever and delete all but
* the console which is pointed at by the current symlink.
*/
if (destroy_console_devs(zlogp) == -1) {
goto error;
}
}
/*
* Time to make the consoles!
*/
if ((bus_hdl = devctl_bus_acquire(ZCONSNEX_FILEPATH, 0)) == NULL) {
zerror(zlogp, B_TRUE, "%s failed", "devctl_bus_acquire");
goto error;
}
if ((ddef_hdl = devctl_ddef_alloc("zcons", 0)) == NULL) {
zerror(zlogp, B_TRUE, "failed to allocate ddef handle");
goto error;
}
/*
* Set three properties on this node; the first is the name of the
* zone; the second is a flag which lets pseudo know that it is
* OK to automatically allocate an instance # for this device;
* the third tells the device framework not to auto-detach this
* node-- we need the node to still be there when we ask devfsadmd
* to make links, and when we need to open it.
*/
if (devctl_ddef_string(ddef_hdl, "zonename", zone_name) == -1) {
zerror(zlogp, B_TRUE, "failed to create zonename property");
goto error;
}
if (devctl_ddef_int(ddef_hdl, "auto-assign-instance", 1) == -1) {
zerror(zlogp, B_TRUE, "failed to create auto-assign-instance "
"property");
goto error;
}
if (devctl_ddef_int(ddef_hdl, "ddi-no-autodetach", 1) == -1) {
zerror(zlogp, B_TRUE, "failed to create ddi-no-auto-detach "
"property");
goto error;
}
if (devctl_bus_dev_create(bus_hdl, ddef_hdl, 0, &dev_hdl) == -1) {
zerror(zlogp, B_TRUE, "failed to create console node");
goto error;
}
devlinks:
if ((dl = di_devlink_init("zcons", DI_MAKE_LINK)) != NULL) {
(void) di_devlink_fini(&dl);
} else {
zerror(zlogp, B_TRUE, "failed to create devlinks");
goto error;
}
/*
* Open the master side of the console and issue the ZC_HOLDSLAVE ioctl,
* which will cause the master to retain a reference to the slave.
* This prevents ttymon from blowing through the slave's STREAMS anchor.
*
* In very rare cases the open returns ENOENT if devfs doesn't have
* everything setup yet due to heavy zone startup load. Wait for
* 1 sec. and retry a few times. Even if we can't setup the zone's
* console, we still go ahead and boot the zone.
*/
(void) snprintf(conspath, sizeof (conspath), "/dev/zcons/%s/%s",
zone_name, ZCONS_MASTER_NAME);
for (i = 0; i < ZCONS_RETRY; i++) {
masterfd = open(conspath, O_RDWR | O_NOCTTY);
if (masterfd >= 0 || errno != ENOENT)
break;
(void) sleep(1);
}
if (masterfd == -1) {
zerror(zlogp, B_TRUE, "ERROR: could not open master side of "
"zone console for %s to acquire slave handle", zone_name);
master_zcons_failed = B_TRUE;
}
(void) snprintf(conspath, sizeof (conspath), "/dev/zcons/%s/%s",
zone_name, ZCONS_SLAVE_NAME);
for (i = 0; i < ZCONS_RETRY; i++) {
slavefd = open(conspath, O_RDWR | O_NOCTTY);
if (slavefd >= 0 || errno != ENOENT)
break;
(void) sleep(1);
}
if (slavefd == -1)
zerror(zlogp, B_TRUE, "ERROR: could not open slave side of zone"
" console for %s to acquire slave handle", zone_name);
/*
* This ioctl can occasionally return ENXIO if devfs doesn't have
* everything plumbed up yet due to heavy zone startup load. Wait for
* 1 sec. and retry a few times before we fail to boot the zone.
*/
if (masterfd != -1 && slavefd != -1) {
for (i = 0; i < ZCONS_RETRY; i++) {
if (ioctl(masterfd, ZC_HOLDSLAVE,
(caddr_t)(intptr_t)slavefd) == 0) {
rv = 0;
break;
} else if (errno != ENXIO) {
break;
}
(void) sleep(1);
}
if (rv != 0)
zerror(zlogp, B_TRUE, "ERROR: error while acquiring "
"slave handle of zone console for %s", zone_name);
}
if (slavefd != -1)
(void) close(slavefd);
if (masterfd != -1)
(void) close(masterfd);
error:
if (ddef_hdl)
devctl_ddef_free(ddef_hdl);
if (bus_hdl)
devctl_release(bus_hdl);
if (dev_hdl)
devctl_release(dev_hdl);
return (rv);
}
