tracing: send_sigqueue() needs trace_signal_generate() too

Add trace_signal_generate() into send_sigqueue().

send_sigqueue() is very similar to __send_signal(), just it uses
the preallocated info. It should do the same wrt tracing.

Reported-by: Seiji Aguchi <saguchi@redhat.com>
Reviewed-by: Seiji Aguchi <seiji.aguchi@hds.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>

diff --git a/kernel/signal.c b/kernel/signal.c
index 1bd9e86fda1fa211a13ded8497113a20ada85991..8511e39813c778f8e09d1dc8069e9697305c3e9e 100644 (file)
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1591,7 +1591,7 @@ int send_sigqueue(struct sigqueue *q, struct task_struct *t, int group)
        int sig = q->info.si_signo;
        struct sigpending *pending;
        unsigned long flags;
-       int ret;
+       int ret, result;
 
        BUG_ON(!(q->flags & SIGQUEUE_PREALLOC));
 
@@ -1600,6 +1600,7 @@ int send_sigqueue(struct sigqueue *q, struct task_struct *t, int group)
                goto ret;
 
        ret = 1; /* the signal is ignored */
+       result = TRACE_SIGNAL_IGNORED;
        if (!prepare_signal(sig, t, 0))
                goto out;
 
@@ -1611,6 +1612,7 @@ int send_sigqueue(struct sigqueue *q, struct task_struct *t, int group)
                 */
                BUG_ON(q->info.si_code != SI_TIMER);
                q->info.si_overrun++;
+               result = TRACE_SIGNAL_ALREADY_PENDING;
                goto out;
        }
        q->info.si_overrun = 0;
@@ -1620,7 +1622,9 @@ int send_sigqueue(struct sigqueue *q, struct task_struct *t, int group)
        list_add_tail(&q->list, &pending->list);
        sigaddset(&pending->signal, sig);
        complete_signal(sig, t, group);
+       result = TRACE_SIGNAL_DELIVERED;
 out:
+       trace_signal_generate(sig, &q->info, t, group, result);
        unlock_task_sighand(t, &flags);
 ret:
        return ret;