Implemented basic xml generation
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15
src/domain.h
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src/domain.h
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#pragma once
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#include "utils.h"
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/// @brief Converts a container identifier to a domain identifier.
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/// @param _domain The string pointer to store the resulting domain identifier in. The caller is responsible for freeing the string.
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/// @param container The container identifier to convert.
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/// @return The result of the operation.
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result_t container_to_domain_identifier(char** _domain, const char* container);
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/// @brief Converts a domain identifier to a container identifier.
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/// @param _container The string pointer to store the resulting container identifier in. The caller is responsible for freeing the string.
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/// @param domain The domain identifier to convert.
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/// @return The result of the operation.
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result_t domain_to_container_identifier(char** _container, const char* domain);
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250
src/xml.c
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250
src/xml.c
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#include "xml.h"
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#include "pci.h"
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#include "container.h"
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#include <string.h>
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#include <stdio.h>
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result_t generate_domain_xml(char** _xml, const char* container, uint64_t memory, int vcpus, const char** pci_addresses, const char** iso_paths, int vnc_port, const char* vnc_password) {
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// Initialize the output parameters
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*_xml = NULL;
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// Generate the XML configuration for the PCI devices
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char* pci_xml;
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result_t result = generate_pci_xml(&pci_xml, pci_addresses);
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if (result != success())
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return result;
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// Generate the XML configuration for the ISO images
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char* iso_xml;
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result = generate_iso_xml(&iso_xml, iso_paths);
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if (result != success()) {
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free(pci_xml);
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return result;
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}
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// Generate the XML configuration for the VNC server
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char* vnc_xml;
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result = generate_vnc_xml(&vnc_xml, vnc_port, vnc_password);
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if (result != success()) {
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free(pci_xml);
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free(iso_xml);
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return result;
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}
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// Get the container path
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char* container_path;
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result = get_container_path(&container_path, container);
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if (result != success()) {
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free(pci_xml);
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free(iso_xml);
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free(vnc_xml);
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return result;
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}
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// Generate the XML configuration for the domain
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char* xml;
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result = format(&xml, "<domain type='kvm'>\n"
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"<name>%s</name>\n"
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"\n<!-- Resources -->\n"
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"<memory unit='B'>%lu</memory>\n"
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"<vcpu>%d</vcpu>\n"
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"<cpu mode='host-passthrough'/>\n"
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"\n<!-- OS -->\n"
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"<os>\n"
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"<type arch='x86_64' machine='q35'>hvm</type>\n"
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"<bootmenu enable='no'/>\n"
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"</os>\n"
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"\n<!-- Features -->\n"
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"<features>\n"
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"<acpi/>\n"
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"<apic/>\n"
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"</features>\n"
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"\n<!-- Clock -->\n"
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"<clock offset='utc'>\n"
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"<timer name='rtc' tickpolicy='catchup'/>\n"
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"<timer name='pit' tickpolicy='delay'/>\n"
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"<timer name='hpet' present='no'/>\n"
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"</clock>\n"
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"\n<!-- Behavior -->\n"
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"<on_poweroff>destroy</on_poweroff>\n"
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"<on_reboot>destroy</on_reboot>\n"
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"<on_crash>destroy</on_crash>\n"
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"<pm>\n"
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"<suspend-to-mem enabled='yes'/>\n"
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"<suspend-to-disk enabled='yes'/>\n"
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"</pm>\n"
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"\n<!-- Devices -->\n"
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"<devices>\n"
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"<emulator>/usr/bin/qemu-system-x86_64</emulator>\n"
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"\n<!-- Disks -->\n"
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"<disk type='file' device='disk'>\n"
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"<driver name='qemu' type='qcow2'/>\n"
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"<source file='%s'/>\n"
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"<target dev='hda' bus='sata'/>\n"
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"<boot order='1'/>\n"
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"</disk>\n"
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"\n<!-- PCI devices -->\n"
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"%s"
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"\n<!-- ISO images -->\n"
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"%s"
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"\n<!-- VNC server -->\n"
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"%s"
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"\n<!-- Misc -->\n"
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"<watchdog model='itco' action='poweroff'/>\n"
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"<memballoon model='none'/>\n"
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"</devices>\n"
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"</domain>\n",
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container, memory, vcpus, container_path, pci_xml, iso_xml, vnc_xml);
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free(pci_xml);
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free(iso_xml);
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free(vnc_xml);
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free(container_path);
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if (result != success())
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return result;
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// Return the result
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*_xml = xml;
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return success();
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}
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result_t generate_pci_xml(char** _xml, const char** pci_addresses) {
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// Initialize the output parameters
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*_xml = NULL;
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// Get the IOMMU group for each PCI address
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int* iommu_groups;
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int iommu_groups_count;
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result_t result = get_iommu_groups(&iommu_groups, &iommu_groups_count, pci_addresses);
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if (result != success())
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return result;
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// Get the PCI devices for each IOMMU group (the devices that should be passed through)
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char** pci_devices;
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result = get_iommu_groups_devices(&pci_devices, iommu_groups, iommu_groups_count);
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// Free the IOMMU groups as they are no longer needed
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free(iommu_groups);
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if (result != success())
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return result;
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// Generate the XML configuration for the PCI devices
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char* xml = strdup("");
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// For each PCI device, generate the XML configuration, and append it to the result
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for (int i = 0; pci_devices[i] != NULL; i++) {
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// Split the PCI address into domain, bus, device, and function
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int domain, bus, device, function;
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if (sscanf(pci_devices[i], "%04x:%02x:%02x.%x", &domain, &bus, &device, &function) != 4) {
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free(xml);
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for (int j = 0; pci_devices[j] != NULL; j++)
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free(pci_devices[j]);
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free(pci_devices);
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return failure("Failed to parse PCI address.");
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}
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// Generate the XML configuration for the PCI device
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char* device_xml;
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result = format(&device_xml, "<hostdev mode='subsystem' type='pci' managed='yes'>\n"
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"<source>\n"
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"<address domain='0x%04x' bus='0x%02x' slot='0x%02x' function='0x%x'/>\n"
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"</source>\n"
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"</hostdev>\n",
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domain, bus, device, function);
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if (result != success()) {
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free(xml);
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for (int j = 0; pci_devices[j] != NULL; j++)
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free(pci_devices[j]);
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free(pci_devices);
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return result;
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}
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// Append the new XML configuration to the result
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char* new_xml;
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result = format(&new_xml, "%s%s", xml, device_xml);
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free(device_xml);
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if (result != success()) {
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free(xml);
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for (int j = 0; pci_devices[j] != NULL; j++)
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free(pci_devices[j]);
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free(pci_devices);
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return result;
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}
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// Swap the old and new XML configurations
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free(xml);
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xml = new_xml;
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}
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// Free the PCI devices as they are no longer needed
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for (int i = 0; pci_devices[i] != NULL; i++)
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free(pci_devices[i]);
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free(pci_devices);
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// Return the result
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*_xml = xml;
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return success();
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}
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result_t generate_iso_xml(char** _xml, const char** iso_paths) {
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// Initialize the output parameters
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*_xml = NULL;
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// Generate the XML configuration for the ISO images
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char* xml = strdup("");
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// For each ISO image, generate the XML configuration, and append it to the result
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for (int i = 0; iso_paths[i] != NULL; i++) {
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if (i > 25) {
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free(xml);
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return failure("Too many ISO images.");
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}
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char* iso_xml;
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result_t result = format(&iso_xml, "<disk type='file' device='cdrom'>\n"
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"<driver name='qemu' type='raw'/>\n"
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"<source file='%s'/>\n"
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"<target dev='hd%c' bus='sata'/>\n"
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"<readonly/>\n"
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"<boot order='%d'/>\n"
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"</disk>\n",
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iso_paths[i], 'b' + i, 2 + i); // hda is reserved for the main disk
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if (result != success()) {
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free(xml);
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return result;
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}
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// Append the new XML configuration to the result
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char* new_xml;
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result = format(&new_xml, "%s%s", xml, iso_xml);
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free(iso_xml);
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if (result != success()) {
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free(xml);
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return result;
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}
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// Swap the old and new XML configurations
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free(xml);
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xml = new_xml;
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}
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// Return the result
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*_xml = xml;
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return success();
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}
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result_t generate_vnc_xml(char** _xml, int vnc_port, const char* vnc_password) {
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// Initialize the output parameters
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*_xml = NULL;
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// Generate the XML configuration for the VNC server (if enabled)
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if (vnc_port != 0)
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return format(_xml, "<graphics type='vnc' port='%d' autoport='no' listen='0.0.0.0' passwd='%s'/>", vnc_port, vnc_password);
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return format(_xml, "");
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}
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