From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9877E28C2A2; Wed, 7 May 2025 16:14:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746634458; cv=none; b=KS9GQCVyG0WxlJNONCF7wc2kqpLy/G7IZbsz/2P/x+7j3/orA750917PgUcXcPFXMDTAHaf7gaszPZzUH+gRiN2kGU6fgIcsOEdoDtFoWMqPeSN6ZFnMIle52V0sif/SqNyNWXqFAnfi0XpdQeIZPkafHchgxxoTHhNSEP8VDnk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746634458; c=relaxed/simple; bh=6nqvwh3i7pYcCmLUo6yNb/a7vH5qP7uGXblBD1xyfls=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=kDaBq7uqRnkoVBbYmuK7jubg4sZp5pHCQoPc2XH6w/7vO1Q9Py95w1saUNIabYf1fe7ilsFQ+oyLWWYHPcbKznIkCw/PCnJJN7FpJEcOqYB9ZgENTUHN/KJdT+bOOKDdGujb4Y6HqeYWf2eFNgKMPc68N8xAyIZzw+0r62oJhpo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=E7MJjfZj; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="E7MJjfZj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 15883C4CEE9; Wed, 7 May 2025 16:14:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746634458; bh=6nqvwh3i7pYcCmLUo6yNb/a7vH5qP7uGXblBD1xyfls=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=E7MJjfZj2G9psWsfoa0aPSW9JH5YpD7kwjtfcqAJ0StXJXGbDQnaHtbWd1MRrhlLT r7lrLrOMyzvctTNYdF+MF6xGoms/IYvKA95I5hprvaHcCOLMWBdU+XZ3I8rqhzQUJO 4S+E4pEQuZaswwIP3fqrG4mZfJg3NiGBEAGOmJpmezAi6BIyQB7RgsRL9C8hc1RgBr KCv6d8Ntcrn8IF8M7HwF2An1dECuICrH0x8Lo1Jgp74ll9XBgFY4sHuUs67TcCxIrl j3aMEoTOLhP1W4T1wuYV6HrWfxzhT3ZDfxcAtEhFeKUj1P+pWCR3w7kzKXccGIjHOt a32YsRAUKSlzw== From: Christian Brauner Date: Wed, 07 May 2025 18:13:40 +0200 Subject: [PATCH v4 07/11] coredump: show supported coredump modes Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250507-work-coredump-socket-v4-7-af0ef317b2d0@kernel.org> References: <20250507-work-coredump-socket-v4-0-af0ef317b2d0@kernel.org> In-Reply-To: <20250507-work-coredump-socket-v4-0-af0ef317b2d0@kernel.org> To: Kuniyuki Iwashima , linux-fsdevel@vger.kernel.org, Jann Horn Cc: Eric Dumazet , Oleg Nesterov , "David S. Miller" , Alexander Viro , Daan De Meyer , David Rheinsberg , Jakub Kicinski , Jan Kara , Lennart Poettering , Luca Boccassi , Mike Yuan , Paolo Abeni , Simon Horman , =?utf-8?q?Zbigniew_J=C4=99drzejewski-Szmek?= , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Christian Brauner , Alexander Mikhalitsyn X-Mailer: b4 0.15-dev-c25d1 X-Developer-Signature: v=1; a=openpgp-sha256; l=1139; i=brauner@kernel.org; h=from:subject:message-id; bh=6nqvwh3i7pYcCmLUo6yNb/a7vH5qP7uGXblBD1xyfls=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWRIt21lecp9yPXGI9FQh/2GrRWHmZcrsQVol2mWcLs0r nVxNmztKGVhEONikBVTZHFoNwmXW85TsdkoUwNmDisTyBAGLk4BmAjXK0aGM7eCgq+u/+AS8Uta Yc279EabJW+WFIuEL3vL5rDVQGbvQkaGl6rGkUsE87evevdKpuXIYj4pn0DtsMu7tY+ttOhZ6N/ LAAA= X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Allow userspace to discover what coredump modes are supported. Signed-off-by: Christian Brauner --- fs/coredump.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/fs/coredump.c b/fs/coredump.c index 0f00f77be988..e1e6f02e0ed7 100644 --- a/fs/coredump.c +++ b/fs/coredump.c @@ -1220,6 +1220,12 @@ static int proc_dostring_coredump(const struct ctl_table *table, int write, static const unsigned int core_file_note_size_min = CORE_FILE_NOTE_SIZE_DEFAULT; static const unsigned int core_file_note_size_max = CORE_FILE_NOTE_SIZE_MAX; +static char core_modes[] = { + "file\npipe" +#ifdef CONFIG_UNIX + "\nlinuxafsk/coredump.socket" +#endif +}; static const struct ctl_table coredump_sysctls[] = { { @@ -1263,6 +1269,13 @@ static const struct ctl_table coredump_sysctls[] = { .extra1 = SYSCTL_ZERO, .extra2 = SYSCTL_ONE, }, + { + .procname = "core_modes", + .data = core_modes, + .maxlen = sizeof(core_modes) - 1, + .mode = 0444, + .proc_handler = proc_dostring, + }, }; static int __init init_fs_coredump_sysctls(void) -- 2.47.2