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#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <xenctrl.h>
#include <xc_dom.h>
#include <xenstore.h>
#include <xen/sys/xenbus_dev.h>
static uint32_t domid = -1;
static int build(xc_interface *xch, char** argv)
{
char cmdline[512];
uint32_t ssid;
xen_domain_handle_t handle = { 0 };
int rv;
int xs_fd = open("/dev/xen/xenbus_backend", O_RDWR);
struct xc_dom_image *dom;
int maxmem = atoi(argv[2]);
int limit_kb = (maxmem + 1)*1024;
rv = xc_flask_context_to_sid(xch, argv[3], strlen(argv[3]), &ssid);
if (rv) return rv;
rv = xc_domain_create(xch, ssid, handle, 0, &domid);
if (rv) return rv;
rv = xc_domain_max_vcpus(xch, domid, 1);
if (rv) return rv;
rv = xc_domain_setmaxmem(xch, domid, limit_kb);
if (rv) return rv;
rv = xc_domain_set_memmap_limit(xch, domid, limit_kb);
if (rv) return rv;
rv = ioctl(xs_fd, IOCTL_XENBUS_BACKEND_SETUP, domid);
if (rv < 0) return rv;
snprintf(cmdline, 512, "--event %d --internal-db", rv);
dom = xc_dom_allocate(xch, cmdline, NULL);
rv = xc_dom_kernel_file(dom, argv[1]);
if (rv) return rv;
rv = xc_dom_boot_xen_init(dom, xch, domid);
if (rv) return rv;
rv = xc_dom_parse_image(dom);
if (rv) return rv;
rv = xc_dom_mem_init(dom, maxmem);
if (rv) return rv;
rv = xc_dom_boot_mem_init(dom);
if (rv) return rv;
rv = xc_dom_build_image(dom);
if (rv) return rv;
rv = xc_dom_boot_image(dom);
if (rv) return rv;
xc_dom_release(dom);
rv = xc_domain_set_virq_handler(xch, domid, VIRQ_DOM_EXC);
if (rv) return rv;
rv = xc_domain_unpause(xch, domid);
if (rv) return rv;
return 0;
}
int main(int argc, char** argv)
{
xc_interface *xch;
struct xs_handle *xsh;
char buf[16];
int rv, fd;
if (argc != 4) {
printf("Use: %s <xenstore-kernel> <memory_mb> <flask-label>\n", argv[0]);
return 2;
}
xch = xc_interface_open(NULL, NULL, 0);
if (!xch) return 1;
rv = build(xch, argv);
xc_interface_close(xch);
if (rv) return 1;
xsh = xs_open(0);
rv = snprintf(buf, 16, "%d", domid);
xs_write(xsh, XBT_NULL, "/tool/xenstored/domid", buf, rv);
xs_daemon_close(xsh);
fd = creat("/var/run/xenstored.pid", 0666);
if (fd < 0)
return 3;
rv = snprintf(buf, 16, "domid:%d\n", domid);
rv = write(fd, buf, rv);
close(fd);
if (rv < 0)
return 3;
return 0;
}
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