linux-kernel - [PATCH v4 10/11] selftests/pidfd: add PIDFD_INFO

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Message-Id: <20250507-work-coredump-socket-v4-10-af0ef317b2d0@kernel.org>
Date: Wed, 07 May 2025 18:13:43 +0200
From: Christian Brauner <brauner@...nel.org>
To: Kuniyuki Iwashima <kuniyu@...zon.com>, linux-fsdevel@...r.kernel.org, 
 Jann Horn <jannh@...gle.com>
Cc: Eric Dumazet <edumazet@...gle.com>, Oleg Nesterov <oleg@...hat.com>, 
 "David S. Miller" <davem@...emloft.net>, 
 Alexander Viro <viro@...iv.linux.org.uk>, 
 Daan De Meyer <daan.j.demeyer@...il.com>, 
 David Rheinsberg <david@...dahead.eu>, Jakub Kicinski <kuba@...nel.org>, 
 Jan Kara <jack@...e.cz>, Lennart Poettering <lennart@...ttering.net>, 
 Luca Boccassi <bluca@...ian.org>, Mike Yuan <me@...dnzj.com>, 
 Paolo Abeni <pabeni@...hat.com>, Simon Horman <horms@...nel.org>, 
 Zbigniew Jędrzejewski-Szmek <zbyszek@...waw.pl>, 
 linux-kernel@...r.kernel.org, netdev@...r.kernel.org, 
 Christian Brauner <brauner@...nel.org>, 
 Alexander Mikhalitsyn <alexander@...alicyn.com>
Subject: [PATCH v4 10/11] selftests/pidfd: add PIDFD_INFO_COREDUMP
 infrastructure

Add PIDFD_INFO_COREDUMP infrastructure so we can use it in tests.

Signed-off-by: Christian Brauner <brauner@...nel.org>
---
 tools/testing/selftests/pidfd/pidfd.h | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/tools/testing/selftests/pidfd/pidfd.h b/tools/testing/selftests/pidfd/pidfd.h
index 55bcf81a2b9a..887c74007086 100644
--- a/tools/testing/selftests/pidfd/pidfd.h
+++ b/tools/testing/selftests/pidfd/pidfd.h
@@ -131,6 +131,26 @@
 #define PIDFD_INFO_EXIT			(1UL << 3) /* Always returned if available, even if not requested */
 #endif

+#ifndef PIDFD_INFO_COREDUMP
+#define PIDFD_INFO_COREDUMP	(1UL << 4)
+#endif
+
+#ifndef PIDFD_COREDUMPED
+#define PIDFD_COREDUMPED	(1U << 0) /* Did crash and... */
+#endif
+
+#ifndef PIDFD_COREDUMP_SKIP
+#define PIDFD_COREDUMP_SKIP	(1U << 1) /* coredumping generation was skipped. */
+#endif
+
+#ifndef PIDFD_COREDUMP_USER
+#define PIDFD_COREDUMP_USER	(1U << 2) /* coredump was done as the user. */
+#endif
+
+#ifndef PIDFD_COREDUMP_ROOT
+#define PIDFD_COREDUMP_ROOT	(1U << 3) /* coredump was done as root. */
+#endif
+
 #ifndef PIDFD_THREAD
 #define PIDFD_THREAD O_EXCL
 #endif
@@ -150,6 +170,9 @@ struct pidfd_info {
 	__u32 fsuid;
 	__u32 fsgid;
 	__s32 exit_code;
+	__u32 coredump_mask;
+	__u32 __spare1;
+	__u64 coredump_cookie;
 };

 /*

-- 
2.47.2