/* Complete domain destroy after RCU readers are not holding old references. */
static void complete_domain_destroy(struct rcu_head *head)
{
struct domain *d = container_of(head, struct domain, rcu);
struct vcpu *v;
int i;
for ( i = d->max_vcpus - 1; i >= 0; i-- )
{
if ( (v = d->vcpu[i]) == NULL )
continue;
tasklet_kill(&v->continue_hypercall_tasklet);
vcpu_destroy(v);
sched_destroy_vcpu(v);
destroy_waitqueue_vcpu(v);
}
grant_table_destroy(d);
arch_domain_destroy(d);
watchdog_domain_destroy(d);
rangeset_domain_destroy(d);
cpupool_rm_domain(d);
sched_destroy_domain(d);
/* Free page used by xen oprofile buffer. */
free_xenoprof_pages(d);
xfree(d->mem_event);
for ( i = d->max_vcpus - 1; i >= 0; i-- )
if ( (v = d->vcpu[i]) != NULL )
free_vcpu_struct(v);
if ( d->target != NULL )
put_domain(d->target);
evtchn_destroy_final(d);
xfree(d->pirq_mask);
xfree(d->pirq_to_evtchn);
xsm_free_security_domain(d);
free_domain_struct(d);
send_guest_global_virq(dom0, VIRQ_DOM_EXC);
}
struct domain *domain_create(
domid_t domid, unsigned int domcr_flags, uint32_t ssidref)
{
struct domain *d, **pd;
enum { INIT_xsm = 1u<<0, INIT_watchdog = 1u<<1, INIT_rangeset = 1u<<2,
INIT_evtchn = 1u<<3, INIT_gnttab = 1u<<4, INIT_arch = 1u<<5 };
int err, init_status = 0;
int poolid = CPUPOOLID_NONE;
if ( (d = alloc_domain_struct()) == NULL )
return ERR_PTR(-ENOMEM);
d->domain_id = domid;
lock_profile_register_struct(LOCKPROF_TYPE_PERDOM, d, domid, "Domain");
if ( (err = xsm_alloc_security_domain(d)) != 0 )
goto fail;
init_status |= INIT_xsm;
watchdog_domain_init(d);
init_status |= INIT_watchdog;
atomic_set(&d->refcnt, 1);
spin_lock_init_prof(d, domain_lock);
spin_lock_init_prof(d, page_alloc_lock);
spin_lock_init(&d->hypercall_deadlock_mutex);
INIT_PAGE_LIST_HEAD(&d->page_list);
INIT_PAGE_LIST_HEAD(&d->xenpage_list);
spin_lock_init(&d->node_affinity_lock);
d->node_affinity = NODE_MASK_ALL;
d->auto_node_affinity = 1;
spin_lock_init(&d->shutdown_lock);
d->shutdown_code = -1;
err = -ENOMEM;
if ( !zalloc_cpumask_var(&d->domain_dirty_cpumask) )
goto fail;
if ( domcr_flags & DOMCRF_hvm )
d->is_hvm = 1;
if ( domid == 0 )
{
d->is_pinned = opt_dom0_vcpus_pin;
d->disable_migrate = 1;
}
rangeset_domain_initialise(d);
init_status |= INIT_rangeset;
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 fail;
if ( domcr_flags & DOMCRF_dummy )
return d;
if ( !is_idle_domain(d) )
{
if ( (err = xsm_domain_create(XSM_HOOK, d, ssidref)) != 0 )
goto fail;
d->is_paused_by_controller = 1;
atomic_inc(&d->pause_count);
if ( domid )
d->nr_pirqs = nr_static_irqs + extra_domU_irqs;
else
d->nr_pirqs = nr_static_irqs + extra_dom0_irqs;
if ( d->nr_pirqs > nr_irqs )
d->nr_pirqs = nr_irqs;
radix_tree_init(&d->pirq_tree);
if ( (err = evtchn_init(d)) != 0 )
goto fail;
init_status |= INIT_evtchn;
if ( (err = grant_table_create(d)) != 0 )
goto fail;
init_status |= INIT_gnttab;
poolid = 0;
err = -ENOMEM;
d->mem_event = xzalloc(struct mem_event_per_domain);
if ( !d->mem_event )
goto fail;
}
if ( (err = arch_domain_create(d, domcr_flags)) != 0 )
goto fail;
init_status |= INIT_arch;
if ( (err = cpupool_add_domain(d, poolid)) != 0 )
goto fail;
if ( (err = sched_init_domain(d)) != 0 )
goto fail;
if ( !is_idle_domain(d) )
{
spin_lock(&domlist_update_lock);
pd = &domain_list; /* NB. domain_list maintained in order of domid. */
for ( pd = &domain_list; *pd != NULL; pd = &(*pd)->next_in_list )
if ( (*pd)->domain_id > d->domain_id )
break;
d->next_in_list = *pd;
d->next_in_hashbucket = domain_hash[DOMAIN_HASH(domid)];
rcu_assign_pointer(*pd, d);
rcu_assign_pointer(domain_hash[DOMAIN_HASH(domid)], d);
spin_unlock(&domlist_update_lock);
}
return d;
fail:
d->is_dying = DOMDYING_dead;
atomic_set(&d->refcnt, DOMAIN_DESTROYED);
xfree(d->mem_event);
if ( init_status & INIT_arch )
arch_domain_destroy(d);
if ( init_status & INIT_gnttab )
grant_table_destroy(d);
if ( init_status & INIT_evtchn )
{
evtchn_destroy(d);
evtchn_destroy_final(d);
radix_tree_destroy(&d->pirq_tree, free_pirq_struct);
}
if ( init_status & INIT_rangeset )
rangeset_domain_destroy(d);
if ( init_status & INIT_watchdog )
watchdog_domain_destroy(d);
if ( init_status & INIT_xsm )
xsm_free_security_domain(d);
free_cpumask_var(d->domain_dirty_cpumask);
free_domain_struct(d);
return ERR_PTR(err);
}
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;
}