diff options
| -rw-r--r-- | xen/common/domain.c | 21 | ||||
| -rw-r--r-- | xen/include/xen/sched.h | 11 |
2 files changed, 32 insertions, 0 deletions
diff --git a/xen/common/domain.c b/xen/common/domain.c index a1aa05e03b..52489b3924 100644 --- a/xen/common/domain.c +++ b/xen/common/domain.c @@ -420,6 +420,13 @@ struct domain *rcu_lock_domain_by_id(domid_t dom) return d; } +struct domain *rcu_lock_domain_by_any_id(domid_t dom) +{ + if ( dom == DOMID_SELF ) + return rcu_lock_current_domain(); + return rcu_lock_domain_by_id(dom); +} + int rcu_lock_target_domain_by_id(domid_t dom, struct domain **d) { if ( dom == DOMID_SELF ) @@ -454,6 +461,20 @@ int rcu_lock_remote_target_domain_by_id(domid_t dom, struct domain **d) return 0; } +int rcu_lock_remote_domain_by_id(domid_t dom, struct domain **d) +{ + if ( (*d = rcu_lock_domain_by_id(dom)) == NULL ) + return -ESRCH; + + if ( *d == current->domain ) + { + rcu_unlock_domain(*d); + return -EPERM; + } + + return 0; +} + int domain_kill(struct domain *d) { int rc = 0; diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h index 53804c87d5..b0def4a424 100644 --- a/xen/include/xen/sched.h +++ b/xen/include/xen/sched.h @@ -447,6 +447,11 @@ struct domain *domain_create( struct domain *rcu_lock_domain_by_id(domid_t dom); /* + * As above function, but resolves DOMID_SELF to current domain + */ +struct domain *rcu_lock_domain_by_any_id(domid_t dom); + +/* * As above function, but accounts for current domain context: * - Translates target DOMID_SELF into caller's domain id; and * - Checks that caller has permission to act on the target domain. @@ -460,6 +465,12 @@ int rcu_lock_target_domain_by_id(domid_t dom, struct domain **d); */ int rcu_lock_remote_target_domain_by_id(domid_t dom, struct domain **d); +/* + * As rcu_lock_domain_by_id(), but will fail EPERM or ESRCH rather than resolve + * to local domain. + */ +int rcu_lock_remote_domain_by_id(domid_t dom, struct domain **d); + /* Finish a RCU critical region started by rcu_lock_domain_by_id(). */ static inline void rcu_unlock_domain(struct domain *d) { |