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#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <systemd/sd-bus.h>
// OpenBMC Host IPMI dbus framework
const char *bus_name = "org.openbmc.HostIpmi";
const char *object_name = "/org/openbmc/HostIpmi/1";
const char *intf_name = "org.openbmc.HostIpmi";
//-------------------------------------------------------------------
// Gets called by PowerOff handler when a Soft Power off is requested
//-------------------------------------------------------------------
static int soft_power_off(sd_bus_message *m, void *userdata, sd_bus_error *ret_error)
{
int64_t bt_resp = -1;
int rc = 0;
// Steps to be taken when we get this.
// 1: Send a SMS_ATN to the Host
// 2: Host receives it and sends a GetMsgFlags IPMI command
// 3: IPMID app handler will respond to that with a MSgFlag with bit:0x2
// set indicating we have a message for Host
// 4: Host sends a GetMsgBuffer command and app handler will respond to
// that with a OEM-SEL with certain fields packed indicating to the
// host that it do a shutdown of the partitions.
// 5: Host does the partition shutdown and calls Chassis Power off command
// 6: App handler handles the command by making a call to ChassisManager
// Dbus
// Now the job is to send the SMS_ATTN.
// Req message contains the specifics about which method etc that we want to
// access on which bus, object
sd_bus_message *response = NULL;
// Error return mechanism
sd_bus_error bus_error = SD_BUS_ERROR_NULL;
// Gets a hook onto either a SYSTEM or SESSION bus
sd_bus *bus = (sd_bus *)ipmid_get_sd_bus_connection();
rc = sd_bus_call_method(bus, // On the System Bus
bus_name, // Service to contact
object_name, // Object path
intf_name, // Interface name
"setAttention", // Method to be called
&bus_error, // object to return error
&response, // Response buffer if any
NULL); // No input arguments
if(rc < 0)
{
fprintf(stderr,"ERROR initiating Power Off:[%s]\n",bus_error.message);
goto finish;
}
// See if we were able to successfully raise SMS_ATN
rc = sd_bus_message_read(response, "x", &bt_resp);
if (rc < 0)
{
fprintf(stderr, "Failed to get a rc from BT for SMS_ATN: %s\n", strerror(-rc));
goto finish;
}
finish:
sd_bus_error_free(&bus_error);
sd_bus_message_unref(response);
if(rc < 0)
{
return sd_bus_reply_method_return(m, "x", rc);
}
else
{
return sd_bus_reply_method_return(m, "x", bt_resp);
}
}
//-------------------------------------------
// Function pointer of APIs exposed via Dbus
//-------------------------------------------
static const sd_bus_vtable host_services_vtable[] =
{
SD_BUS_VTABLE_START(0),
// Takes No("") arguments -but- returns a value of type 64 bit integer("x")
SD_BUS_METHOD("SoftPowerOff", "", "x", &soft_power_off, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_VTABLE_END,
};
//------------------------------------------------------
// Called by IPMID as part of the start up
// -----------------------------------------------------
int start_host_service(sd_bus *bus, sd_bus_slot *slot)
{
int rc = 0;
/* Install the object */
rc = sd_bus_add_object_vtable(bus,
&slot,
"/org/openbmc/HostServices", /* object path */
"org.openbmc.HostServices", /* interface name */
host_services_vtable,
NULL);
if (rc < 0)
{
fprintf(stderr, "Failed to issue method call: %s\n", strerror(-rc));
}
else
{
/* Take one in OpenBmc */
rc = sd_bus_request_name(bus, "org.openbmc.HostServices", 0);
if (rc < 0)
{
fprintf(stderr, "Failed to acquire service name: %s\n", strerror(-rc));
}
}
return rc < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
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