[Devel] [PATCH RH9 23/26] proc connector: send events to both VEs if not in VE#0

[Pavel Tikhomirov]

From: Stanislav Kinsburskiy <skinsbursky at virtuozzo.com>

This is needed to preserve current behaviour, when process in initial pid and
user namespaces (i.e. in VE#0) can receive events from all the processes in
the system.

Signed-off-by: Stanislav Kinsburskiy <skinsbursky at virtuozzo.com>
Reviewed-by: Andrey Ryabinin <aryabinin at virtuozzo.com>

(cherry picked from vz8 commit cf171d6baf24b967796092bbc482aaddd0104d25)
Signed-off-by: Pavel Tikhomirov <ptikhomirov at virtuozzo.com>
---
 drivers/connector/cn_proc.c | 29 ++++++++++++++++++++++-------
 1 file changed, 22 insertions(+), 7 deletions(-)

diff --git a/drivers/connector/cn_proc.c b/drivers/connector/cn_proc.c
index c795a27e2a98..16091278ebb3 100644
--- a/drivers/connector/cn_proc.c
+++ b/drivers/connector/cn_proc.c
@@ -105,16 +105,16 @@ static int proc_event_num_listeners(struct ve_struct *ve)
 	return 0;
 }
 
-static void proc_event_connector(struct task_struct *task,
-				 int what, int cookie,
-				 bool (*fill_event)(struct proc_event *ev,
-						    struct ve_struct *ve,
-						    struct task_struct *task,
-						    int cookie))
+static void proc_event_connector_ve(struct task_struct *task,
+				    struct ve_struct *ve,
+				    int what, int cookie,
+				    bool (*fill_event)(struct proc_event *ev,
+						       struct ve_struct *ve,
+						       struct task_struct *task,
+						       int cookie))
 {
 	struct cn_msg *msg;
 	__u8 buffer[CN_PROC_MSG_SIZE] __aligned(8);
-	struct ve_struct *ve = task->task_ve;
 
 	if (proc_event_num_listeners(ve) < 1)
 		return;
@@ -127,6 +127,21 @@ static void proc_event_connector(struct task_struct *task,
 	send_msg_ve(ve, msg);
 }
 
+static void proc_event_connector(struct task_struct *task,
+				 int what, int cookie,
+				 bool (*fill_event)(struct proc_event *ev,
+						    struct ve_struct *ve,
+						    struct task_struct *task,
+						    int cookie))
+{
+	struct ve_struct *ve = task->task_ve;
+
+	if (!ve_is_super(ve))
+		proc_event_connector_ve(task, ve, what, cookie, fill_event);
+
+	proc_event_connector_ve(task, get_ve0(), what, cookie, fill_event);
+}
+
 static bool fill_fork_event(struct proc_event *ev, struct ve_struct *ve,
 			    struct task_struct *task, int unused)
 {
-- 
2.31.1