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 CA809255F49; Fri, 2 May 2025 12:43:02 +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=1746189782; cv=none; b=iLBcmUa5pxlMahySDYM6ec1xH1Q6DYL99JqvomHCRNpR6uZJO5A0Oy8nW5Rdnff418jm1l4Pigb3g3jodOpKn7PizbNE4thkQr0IFbNV0h2aIk1nwS5WUnG+MbBdbwu6ncCuxI9vhMXtqUM/6zu87uF5czp+6kem3x2qRRpCcaM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746189782; c=relaxed/simple; bh=NhE2hFgc61WAQVF5mM6Mii0VL7txusY2shDJ6wbW/tk=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Ya59JTsMLGMd/grg6DHVwJGRZysSFBLBcpry10fhbpb2PcwcJxKlD2rLJukDCWkgevU5TtoYBZVq8U7mWCTSeSgE6I9iz3EQJ5mIYRIcKodKxQOgvPIc2L1yCLbaCcidzWGqZK2J3HM7OyPw26alJxmfufNhRZBhK0CRLT/Rvp0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MsoFxfiD; 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="MsoFxfiD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 871FDC4CEEB; Fri, 2 May 2025 12:42:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746189782; bh=NhE2hFgc61WAQVF5mM6Mii0VL7txusY2shDJ6wbW/tk=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=MsoFxfiD42mggzSTl5WY9oKWthZvSFgeqnws7iz29iGLCej5NHo4tWo9LL9kQmEG8 CMbc5E/vJftCUtxKv1WC2CPbrS5Jzm9NzR+6inZQA04j4DWyO2w0J0AF4pPMQ1gUaZ 7hdJqB2K7Rin4c9hPHok7+Bjs9DBz8CEMZGrzKUl3XLJ9gYjhLN6DwNdUwwUr7lxVv 7voIIymRURBbqsiA3bxjhH809irT+b8LTarhXwwUb7bWHiRZFoEjsMSVh83w+SfaMn 6cUGJMrMMeDu5B0AZb+6I7MwVv0KHFBdCkJrBZALXoYwwPAWR8QHSnqlUTAHW/6HzF ioKLLlo0CFsTA== From: Christian Brauner Date: Fri, 02 May 2025 14:42:35 +0200 Subject: [PATCH RFC v2 4/6] 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: <20250502-work-coredump-socket-v2-4-43259042ffc7@kernel.org> References: <20250502-work-coredump-socket-v2-0-43259042ffc7@kernel.org> In-Reply-To: <20250502-work-coredump-socket-v2-0-43259042ffc7@kernel.org> To: Eric Dumazet , Kuniyuki Iwashima , Oleg Nesterov , linux-fsdevel@vger.kernel.org, Jann Horn Cc: "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 X-Mailer: b4 0.15-dev-c25d1 X-Developer-Signature: v=1; a=openpgp-sha256; l=1137; i=brauner@kernel.org; h=from:subject:message-id; bh=NhE2hFgc61WAQVF5mM6Mii0VL7txusY2shDJ6wbW/tk=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWSI7D0gs/VbQOHn/2/vSUyRLmD99DBG01VBRj+aYdn3y 25nnme+7ShlYRDjYpAVU2RxaDcJl1vOU7HZKFMDZg4rE8gQBi5OAZjI3J+MDDeL2udn7b7y2V28 8vDRFak5F3bzph+dp2xTzhdzff+6ahaGf5rtp/U3NWpaax8rktG2uLj/UfAvY6eAw59mnl/p/jJ yOTcA 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 | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/fs/coredump.c b/fs/coredump.c index 9a6cba233db9..1c7428c23878 100644 --- a/fs/coredump.c +++ b/fs/coredump.c @@ -1217,6 +1217,13 @@ 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[] = { +#ifdef CONFIG_UNIX + "file\npipe\nunix" +#else + "file\npipe" +#endif +}; static const struct ctl_table coredump_sysctls[] = { { @@ -1260,6 +1267,13 @@ 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