static void
follow_location(domain_t * domain, const char *location, size_t len) {
debug("-- follow location %.*s", (int) len, location);
__sync_fetch_and_add(&domain->options->counters.follow, 1);
char *host;
char c;
size_t host_len;
if (phr_parse_host(location, len, (const char **)&host, &host_len) > 0) {
free(domain->domain);
c = host[host_len];
host[host_len] = 0;
domain->domain = strdup(host);
host[host_len] = c;
if (false == is_valid_location(domain, location, len)) {
free_domain(domain);
return;
}
http_request(domain);
}
}
static void
send_request(struct ev_loop *loop, domain_t * domain) {
debug("send_request %s, search = %s", domain->domain, search_path[domain->index_search]);
char buf[MAXLINE];
ev_io_set(&domain->io, domain->io.fd, EV_READ);
ev_set_cb(&domain->io, recv_handler);
ev_timer_set(&domain->tw, MAXRECVTIME, 0);
size_t len = snprintf(buf, sizeof (buf), http_get, search_path[domain->index_search], domain->domain); /* this is safe */
if (len == writen(domain->io.fd, buf, len)) {
//bzero(domain->data.buffer, sizeof(domain->data.buffer));
domain->data.len = 0;
ev_io_start(loop, &domain->io);
ev_timer_start(loop, &domain->tw);
} else {
free_domain(domain);
}
}
/*
* Release all memory allocated for entire domain list
*/
void free_domain_list(domain_t* list)
{
domain_t* ptr;
if (!list) return;
while(list) {
ptr = list;
list = list->next;
free_domain(ptr);
}
}
static void
add_domain (virDomainPtr dom)
{
struct domain *domain;
domains = realloc (domains, (nr_domains + 1) * sizeof (struct domain));
if (domains == NULL) {
perror ("realloc");
exit (EXIT_FAILURE);
}
domain = &domains[nr_domains];
nr_domains++;
domain->name = strdup (virDomainGetName (dom));
if (domain->name == NULL) {
perror ("strdup");
exit (EXIT_FAILURE);
}
char uuid[VIR_UUID_STRING_BUFLEN];
if (virDomainGetUUIDString (dom, uuid) == 0) {
domain->uuid = strdup (uuid);
if (domain->uuid == NULL) {
perror ("strdup");
exit (EXIT_FAILURE);
}
}
else
domain->uuid = NULL;
domain->disks = NULL;
int n = guestfs___for_each_disk (g, dom, add_disk, domain);
if (n == -1)
exit (EXIT_FAILURE);
domain->nr_disks = n;
if (domain->nr_disks > MAX_DISKS) {
fprintf (stderr,
_("%s: ignoring %s, it has too many disks (%zu > %d)"),
program_name, domain->name, domain->nr_disks, MAX_DISKS);
free_domain (domain);
nr_domains--;
return;
}
}
static void
connect_handler(struct ev_loop *loop, struct ev_io *watcher, int events) {
domain_t * domain = (domain_t *) watcher;
ev_io_stop(loop, &domain->io);
ev_timer_stop(loop, &domain->tw);
debug("-- connected %s", domain->domain);
int error;
socklen_t len = sizeof (error);
if (getsockopt(domain->io.fd, SOL_SOCKET, SO_ERROR, &error, &len) < 0 || error) {
free_domain(domain);
errno = error;
} else {
send_request(loop, domain);
}
}
/*
* Create a new domain structure which will initialy have
* one domain name
*/
static domain_t* new_domain(str* did, str* domain, unsigned int flags)
{
domain_t* d;
int_str name, val;
str name_s = STR_STATIC_INIT(AVP_DID);
d = (domain_t*)shm_malloc(sizeof(domain_t));
if (!d) goto error;
memset(d, 0, sizeof(domain_t));
d->did.s = shm_malloc(did->len);
if (!d->did.s) goto error;
memcpy(d->did.s, did->s, did->len);
d->did.len = did->len;
d->domain = (str*)shm_malloc(sizeof(str));
if (!d->domain) goto error;
d->domain[0].s = shm_malloc(domain->len);
if (!d->domain[0].s) goto error;
memcpy(d->domain[0].s, domain->s, domain->len);
d->domain[0].len = domain->len;
strlower(d->domain);
d->flags = (unsigned int*)shm_malloc(sizeof(unsigned int));
if (!d->flags) goto error;
d->flags[0] = flags;
d->n = 1;
/* Create an attribute containing did of the domain */
name.s = name_s;
val.s = *did;
if (add_avp_list(&d->attrs, AVP_CLASS_DOMAIN | AVP_NAME_STR | AVP_VAL_STR,
name, val) < 0) goto error;
return d;
error:
ERR("Unable to create new domain structure\n");
free_domain(d);
return 0;
}
struct domain *domain_create(domid_t dom_id, unsigned int cpu)
{
struct domain *d, **pd;
struct vcpu *v;
if ( (d = alloc_domain()) == NULL )
return NULL;
d->domain_id = dom_id;
atomic_set(&d->refcnt, 1);
spin_lock_init(&d->big_lock);
spin_lock_init(&d->page_alloc_lock);
INIT_LIST_HEAD(&d->page_list);
INIT_LIST_HEAD(&d->xenpage_list);
rangeset_domain_initialise(d);
if ( !is_idle_domain(d) )
{
set_bit(_DOMF_ctrl_pause, &d->domain_flags);
if ( evtchn_init(d) != 0 )
goto fail1;
if ( grant_table_create(d) != 0 )
goto fail2;
}
if ( arch_domain_create(d) != 0 )
goto fail3;
if ( (v = alloc_vcpu(d, 0, cpu)) == NULL )
goto fail4;
d->iomem_caps = rangeset_new(d, "I/O Memory", RANGESETF_prettyprint_hex);
d->irq_caps = rangeset_new(d, "Interrupts", 0);
if ( (d->iomem_caps == NULL) || (d->irq_caps == NULL) )
goto fail4; /* NB. alloc_vcpu() is undone in free_domain() */
#if 0
if ( sched_init_domain(d) != 0 )
goto fail4;
#endif
if ( !is_idle_domain(d) )
{
write_lock(&domlist_lock);
pd = &domain_list; /* NB. domain_list maintained in order of dom_id. */
for ( pd = &domain_list; *pd != NULL; pd = &(*pd)->next_in_list )
if ( (*pd)->domain_id > d->domain_id )
break;
d->next_in_list = *pd;
*pd = d;
d->next_in_hashbucket = domain_hash[DOMAIN_HASH(dom_id)];
domain_hash[DOMAIN_HASH(dom_id)] = d;
write_unlock(&domlist_lock);
}
return d;
fail4:
arch_domain_destroy(d);
fail3:
if ( !is_idle_domain(d) )
grant_table_destroy(d);
fail2:
if ( !is_idle_domain(d) )
evtchn_destroy(d);
fail1:
rangeset_domain_destroy(d);
free_domain(d);
return NULL;
}
static void
recv_handler(struct ev_loop *loop, struct ev_io *watcher, int events) {
//debug("recv_handler");
size_t i;
domain_t *domain = (domain_t *) watcher;
ev_io_stop(loop, &domain->io);
ev_timer_stop(loop, &domain->tw);
//debug("recv_header %s -- data buffer:%p; data len: %d", domain->domain, domain->data.buffer + domain->data.len, domain->data.len);
ssize_t len = readn(domain->io.fd, domain->data.buffer + domain->data.len, sizeof (domain->data.buffer) - domain->data.len);
if (len <= 0) {
if (EAGAIN == errno) { // сокет занят буфер кончился и прочее
//err_ret("error read socket %s: ", domain->domain);
ev_io_start(loop, &domain->io);
ev_timer_start(loop, &domain->tw);
return;
} else { // жесткая ошибка
err_ret("error read socket %s: ", domain->domain);
free_domain(domain);
return;
}
} else {
domain->data.len += len;
int pret = parse_response(domain);
debug("parse_response %s:%d", domain->domain, pret);
if (pret > 0) {
switch (domain->http.status) {
case 301:
case 302:
{
for (i = 0; i != domain->http.num_headers; ++i) {
if (NULL != memmem(domain->http.headers[i].name, domain->http.headers[i].name_len, "Location", 8)) {
follow_location(domain, domain->http.headers[i].value, domain->http.headers[i].value_len);
return;
//break;
}
}
break;
}
case 200:
{
if (true == parse_body(&domain->data.buffer[pret], domain->data.len - pret)) {
success_checked(domain);
} else {
if (++domain->index_search < (sizeof (search_path) / sizeof (search_path[0]))) {
//ares_gethostbyname(domain->options->ares.channel, domain->domain, AF_INET, ev_ares_dns_callback, (void *) domain);
http_request(domain);
return;
}
}
break;
}
}
} else {
error_parse(domain);
}
}
debug("-- %s %d checked", domain->domain, domain->http.status);
free_domain(domain);
}
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);
}
