[systemd-devel] [PATCH 2/7] domain: add the lock protected version of user accounting

[Djalal Harouni]

Add the lock protected version of __kdbus_domain_user_account(). It
will check if the domain is still active before linking users.

Signed-off-by: Djalal Harouni <tixxdz at opendz.org>
---
 domain.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/domain.c b/domain.c
index a321f31..86fde55 100644
--- a/domain.c
+++ b/domain.c
@@ -451,6 +451,30 @@ int __kdbus_domain_user_account(struct kdbus_domain *domain,
 }
 
 /**
+ * kdbus_domain_user_account() - account a kdbus_domain_user object
+ *				 into the specified domain
+ * @domain:		The domain of the user
+ * @user		The kdbus_domain_user object of the user
+ *
+ * Returns 0 on success. In case of memory allocation failure return
+ * -ENOMEM, or -ESHUTDOWN if the domain was disconnected.
+ */
+int kdbus_domain_user_account(struct kdbus_domain *domain,
+			      struct kdbus_domain_user *user)
+{
+	int ret = -ESHUTDOWN;
+
+	mutex_lock(&domain->lock);
+
+	if (!domain->disconnected)
+		ret = __kdbus_domain_user_account(domain, user);
+
+	mutex_unlock(&domain->lock);
+
+	return ret;
+}
+
+/**
  * kdbus_domain_user_find_or_new() - get a kdbus_domain_user object in a domain
  * @domain:		The domain
  * @uid:		The uid of the user; INVALID_UID for an anonymous
-- 
1.9.3