Beispiel #1
0
void
get_all_libvirt_domains (const char *libvirt_uri)
{
  virErrorPtr err;
  int n;
  size_t i;

  /* Get the list of all domains. */
  conn = virConnectOpenAuth (libvirt_uri, virConnectAuthPtrDefault,
                             VIR_CONNECT_RO);
  if (!conn) {
    err = virGetLastError ();
    fprintf (stderr,
             _("%s: could not connect to libvirt (code %d, domain %d): %s\n"),
             guestfs_int_program_name, err->code, err->domain, err->message);
    exit (EXIT_FAILURE);
  }

  n = virConnectNumOfDomains (conn);
  if (n == -1) {
    err = virGetLastError ();
    fprintf (stderr,
             _("%s: could not get number of running domains (code %d, domain %d): %s\n"),
             guestfs_int_program_name, err->code, err->domain, err->message);
    exit (EXIT_FAILURE);
  }

  int ids[n];
  n = virConnectListDomains (conn, ids, n);
  if (n == -1) {
    err = virGetLastError ();
    fprintf (stderr,
             _("%s: could not list running domains (code %d, domain %d): %s\n"),
             guestfs_int_program_name, err->code, err->domain, err->message);
    exit (EXIT_FAILURE);
  }

  add_domains_by_id (conn, ids, n);

  n = virConnectNumOfDefinedDomains (conn);
  if (n == -1) {
    err = virGetLastError ();
    fprintf (stderr,
             _("%s: could not get number of inactive domains (code %d, domain %d): %s\n"),
             guestfs_int_program_name, err->code, err->domain, err->message);
    exit (EXIT_FAILURE);
  }

  char *names[n];
  n = virConnectListDefinedDomains (conn, names, n);
  if (n == -1) {
    err = virGetLastError ();
    fprintf (stderr,
             _("%s: could not list inactive domains (code %d, domain %d): %s\n"),
             guestfs_int_program_name, err->code, err->domain, err->message);
    exit (EXIT_FAILURE);
  }

  add_domains_by_name (conn, names, n);

  /* You must free these even though the libvirt documentation doesn't
   * mention it.
   */
  for (i = 0; i < (size_t) n; ++i)
    free (names[i]);

  /* No domains? */
  if (nr_domains == 0)
    return;

  /* Sort the domains alphabetically by name for display. */
  qsort (domains, nr_domains, sizeof (struct domain), compare_domain_names);
}
Beispiel #2
0
void
get_domains_from_libvirt (void)
{
  virErrorPtr err;
  virConnectPtr conn;
  int n;
  size_t i, j, nr_disks_added;

  nr_domains = 0;
  domains = NULL;

  /* Get the list of all domains. */
  conn = virConnectOpenReadOnly (libvirt_uri);
  if (!conn) {
    err = virGetLastError ();
    fprintf (stderr,
             _("%s: could not connect to libvirt (code %d, domain %d): %s"),
             program_name, err->code, err->domain, err->message);
    exit (EXIT_FAILURE);
  }

  n = virConnectNumOfDomains (conn);
  if (n == -1) {
    err = virGetLastError ();
    fprintf (stderr,
             _("%s: could not get number of running domains (code %d, domain %d): %s"),
             program_name, err->code, err->domain, err->message);
    exit (EXIT_FAILURE);
  }

  int ids[n];
  n = virConnectListDomains (conn, ids, n);
  if (n == -1) {
    err = virGetLastError ();
    fprintf (stderr,
             _("%s: could not list running domains (code %d, domain %d): %s"),
             program_name, err->code, err->domain, err->message);
    exit (EXIT_FAILURE);
  }

  add_domains_by_id (conn, ids, n);

  n = virConnectNumOfDefinedDomains (conn);
  if (n == -1) {
    err = virGetLastError ();
    fprintf (stderr,
             _("%s: could not get number of inactive domains (code %d, domain %d): %s"),
             program_name, err->code, err->domain, err->message);
    exit (EXIT_FAILURE);
  }

  char *names[n];
  n = virConnectListDefinedDomains (conn, names, n);
  if (n == -1) {
    err = virGetLastError ();
    fprintf (stderr,
             _("%s: could not list inactive domains (code %d, domain %d): %s"),
             program_name, err->code, err->domain, err->message);
    exit (EXIT_FAILURE);
  }

  add_domains_by_name (conn, names, n);

  /* You must free these even though the libvirt documentation doesn't
   * mention it.
   */
  for (i = 0; i < (size_t) n; ++i)
    free (names[i]);

  virConnectClose (conn);

  /* No domains? */
  if (nr_domains == 0)
    return;

  /* Sort the domains alphabetically by name for display. */
  qsort (domains, nr_domains, sizeof (struct domain), compare_domain_names);

  print_title ();

  /* To minimize the number of times we have to launch the appliance,
   * shuffle as many domains together as we can, but not exceeding
   * MAX_DISKS per request.  If --one-per-guest was requested then only
   * request disks from a single guest each time.
   * Interesting application for NP-complete knapsack problem here.
   */
  if (one_per_guest) {
    for (i = 0; i < nr_domains; ++i)
      multi_df (&domains[i], 1);
  } else {
    for (i = 0; i < nr_domains; /**/) {
      nr_disks_added = 0;

      /* Make a request with domains [i..j-1]. */
      for (j = i; j < nr_domains; ++j) {
        if (nr_disks_added + domains[j].nr_disks > MAX_DISKS)
          break;
        nr_disks_added += domains[j].nr_disks;
      }
      multi_df (&domains[i], j-i);

      i = j;
    }
  }

  /* Free up domains structure. */
  for (i = 0; i < nr_domains; ++i)
    free_domain (&domains[i]);
  free (domains);
}