connector: add parent pid and tgid to coredump and exit events

The intention is to get notified of process failures as soon
as possible, before a possible core dumping (which could be very long)
(e.g. in some process-manager). Coredump and exit process events
are perfect for such use cases (see 2b5faa4c553f "connector: Added
coredumping event to the process connector").

The problem is that for now the process-manager cannot know the parent
of a dying process using connectors. This could be useful if the
process-manager should monitor for failures only children of certain
parents, so we could filter the coredump and exit events by parent
process and/or thread ID.

Add parent pid and tgid to coredump and exit process connectors event
data.

Signed-off-by: Stefan Strogin <sstrogin@cisco.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/connector/cn_proc.c b/drivers/connector/cn_proc.c
index a782ce87715c5ccc5270428d40ac0a4bd0832340..ed5e42461094476d76bcee450794ab81a7fe6d5a 100644 (file)
--- a/drivers/connector/cn_proc.c
+++ b/drivers/connector/cn_proc.c
@@ -262,6 +262,8 @@ void proc_coredump_connector(struct task_struct *task)
        ev->what = PROC_EVENT_COREDUMP;
        ev->event_data.coredump.process_pid = task->pid;
        ev->event_data.coredump.process_tgid = task->tgid;
+       ev->event_data.coredump.parent_pid = task->real_parent->pid;
+       ev->event_data.coredump.parent_tgid = task->real_parent->tgid;
 
        memcpy(&msg->id, &cn_proc_event_id, sizeof(msg->id));
        msg->ack = 0; /* not used */
@@ -288,6 +290,8 @@ void proc_exit_connector(struct task_struct *task)
        ev->event_data.exit.process_tgid = task->tgid;
        ev->event_data.exit.exit_code = task->exit_code;
        ev->event_data.exit.exit_signal = task->exit_signal;
+       ev->event_data.exit.parent_pid = task->real_parent->pid;
+       ev->event_data.exit.parent_tgid = task->real_parent->tgid;
 
        memcpy(&msg->id, &cn_proc_event_id, sizeof(msg->id));
        msg->ack = 0; /* not used */

diff --git a/include/uapi/linux/cn_proc.h b/include/uapi/linux/cn_proc.h
index 68ff254147005f5eab04a042f8f0e451287d1423..db210625cee8c8b53169366017ee2d2f95795186 100644 (file)
--- a/include/uapi/linux/cn_proc.h
+++ b/include/uapi/linux/cn_proc.h
@@ -116,12 +116,16 @@ struct proc_event {
                struct coredump_proc_event {
                        __kernel_pid_t process_pid;
                        __kernel_pid_t process_tgid;
+                       __kernel_pid_t parent_pid;
+                       __kernel_pid_t parent_tgid;
                } coredump;
 
                struct exit_proc_event {
                        __kernel_pid_t process_pid;
                        __kernel_pid_t process_tgid;
                        __u32 exit_code, exit_signal;
+                       __kernel_pid_t parent_pid;
+                       __kernel_pid_t parent_tgid;
                } exit;
 
        } event_data;