linux-kernel - [PATCH 2/4] pid: introduce task_ppid

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Message-ID: <20250810173610.GA19995@redhat.com>
Date: Sun, 10 Aug 2025 19:36:10 +0200
From: Oleg Nesterov <oleg@...hat.com>
To: Andrew Morton <akpm@...ux-foundation.org>,
	Christian Brauner <brauner@...nel.org>,
	高翔 <gaoxiang17@...omi.com>
Cc: Al Viro <viro@...iv.linux.org.uk>, Mateusz Guzik <mjguzik@...il.com>,
	Xiang Gao <gxxa03070307@...il.com>, linux-kernel@...r.kernel.org
Subject: [PATCH 2/4] pid: introduce task_ppid_vnr()

for consistency with other task_xid_vnr() helpers.

Signed-off-by: Oleg Nesterov <oleg@...hat.com>
---
 fs/pidfs.c          | 2 +-
 include/linux/pid.h | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/fs/pidfs.c b/fs/pidfs.c
index 4625e097e3a0..de5e71c2b49b 100644
--- a/fs/pidfs.c
+++ b/fs/pidfs.c
@@ -361,7 +361,7 @@ static long pidfd_info(struct file *file, unsigned int cmd, unsigned long arg)
 	 * the fields are set correctly, or return ESRCH to avoid providing
 	 * incomplete information. */
 
-	kinfo.ppid = task_ppid_nr_ns(task, NULL);
+	kinfo.ppid = task_ppid_vnr(task);
 	kinfo.tgid = task_tgid_vnr(task);
 	kinfo.pid = task_pid_vnr(task);
 	kinfo.mask |= PIDFD_INFO_PID;
diff --git a/include/linux/pid.h b/include/linux/pid.h
index 453ae6d8a68d..4a733634c556 100644
--- a/include/linux/pid.h
+++ b/include/linux/pid.h
@@ -306,6 +306,11 @@ static inline pid_t task_ppid_nr_ns(const struct task_struct *tsk, struct pid_na
 	return pid;
 }
 
+static inline pid_t task_ppid_vnr(const struct task_struct *tsk)
+{
+	return task_ppid_nr_ns(tsk, NULL);
+}
+
 static inline pid_t task_ppid_nr(const struct task_struct *tsk)
 {
 	return task_ppid_nr_ns(tsk, &init_pid_ns);
-- 
2.25.1.362.g51ebf55