Add IPMI interface to allow FW updates from Host
New OEM IPMI command to execute commands that would allow the Host to have access to the BMC to perform a FW update.
diff --git a/Makefile b/Makefile
index eaa7324..bacdef9 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,7 @@
all: $(LIB_OEM)
%.o: %.C
- $(CXX) -c $< $(CXXFLAGS) -o $@
+ $(CXX) -std=c++14 -c $< $(CXXFLAGS) -o $@
$(LIB_OEM): $(LIB_OEM_OBJ)
$(CXX) $^ -shared $(LDFLAGS) -o $@
diff --git a/oemhandler.C b/oemhandler.C
index f577d67..22452d6 100644
--- a/oemhandler.C
+++ b/oemhandler.C
@@ -1,7 +1,9 @@
#include "oemhandler.h"
#include <host-ipmid/ipmid-api.h>
+#include <fstream>
#include <stdio.h>
#include <string.h>
+#include <systemd/sd-bus.h>
void register_netfn_oem_partial_esel() __attribute__((constructor));
@@ -70,10 +72,60 @@
return rc;
}
+// Prepare for FW Update.
+// Execute needed commands to prepare the system for a fw update from the host.
+ipmi_ret_t ipmi_ibm_oem_prep_fw_update(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
+ ipmi_request_t request, ipmi_response_t response,
+ ipmi_data_len_t data_len, ipmi_context_t context)
+{
+ ipmi_ret_t ipmi_rc = IPMI_CC_OK;
+ *data_len = 0;
+
+ int rc = 0;
+ std::ofstream rwfs_file;
+ const char *busname = "org.openbmc.control.Bmc";
+ const char *objname = "/org/openbmc/control/bmc0";
+ const char *iface = "org.openbmc.control.Bmc";
+ sd_bus *bus = ipmid_get_sd_bus_connection();
+ sd_bus_message *reply = NULL;
+ sd_bus_error error = SD_BUS_ERROR_NULL;
+ int r = 0;
+
+ // Set one time flag
+ rc = system("fw_setenv openbmconce copy-files-to-ram copy-base-filesystem-to-ram");
+ rc = WEXITSTATUS(rc);
+ if (rc != 0) {
+ fprintf(stderr, "fw_setenv openbmconce failed with rc=%d\n", rc);
+ return IPMI_CC_UNSPECIFIED_ERROR;
+ }
+
+ // Touch the image-rwfs file to perform an empty update to force the save
+ // in case we're already in ram and the flash is the same causing the ram files
+ // to not be copied back to flash
+ rwfs_file.open("/run/initramfs/image-rwfs", std::ofstream::out | std::ofstream::app);
+ rwfs_file.close();
+
+ // Reboot the BMC for settings to take effect
+ r = sd_bus_call_method(bus, busname, objname, iface,
+ "warmReset", &error, &reply, NULL);
+ if (r < 0) {
+ fprintf(stderr, "Failed to reset BMC: %s\n", strerror(-r));
+ return -1;
+ }
+ printf("Warning: BMC is going down for reboot!\n");
+ sd_bus_error_free(&error);
+ reply = sd_bus_message_unref(reply);
+
+ return ipmi_rc;
+}
void register_netfn_oem_partial_esel()
{
printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_OEM, IPMI_CMD_PESEL);
ipmi_register_callback(NETFUN_OEM, IPMI_CMD_PESEL, NULL, ipmi_ibm_oem_partial_esel);
+
+ printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n", NETFUN_OEM, IPMI_CMD_PREP_FW_UPDATE);
+ ipmi_register_callback(NETFUN_OEM, IPMI_CMD_PREP_FW_UPDATE, NULL, ipmi_ibm_oem_prep_fw_update);
+
return;
}
diff --git a/oemhandler.h b/oemhandler.h
index 9cc397f..71ae01c 100644
--- a/oemhandler.h
+++ b/oemhandler.h
@@ -8,6 +8,7 @@
// IPMI commands for net functions.
enum ipmi_netfn_oem_cmds
{
+ IPMI_CMD_PREP_FW_UPDATE = 0x10,
IPMI_CMD_PESEL = 0xF0,
};