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 0DEF4290BDF; Fri, 9 May 2025 10:26:22 +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=1746786383; cv=none; b=Jkpo9I9lbC59O0DZ7uV2V1BNkS65UouwDIJs59F3rzVIvq9Yh+CM4LhnXrVHTN4cNBHBts6Shq/Z5jpyll+NteB03i3dvXRnG7H2Bw558M1Go2XS3anx4KFD5rOWrCrmTvYaAfoVxS4qGGXQc8NB4GnBMEEsiawqsGDap3Ir8uM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746786383; c=relaxed/simple; bh=5W5KUoJ3iZpfXplEUqQaQMHWFuiUtasGtEN3sJaZv/s=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=caoaYSDbDjtIJKbtocd95LaOSrCmOU3M1MjEsiMKNtTVEJJvSvU+3IGjO2PPqbO28aNSEnQSQoqsUNnab0Sm+5d93cMJeXijGaX1MFyTw98Z8f0P/t/LkJIlgECI5LIZGPm/1xYaZTN2+bq8r1S2yr92WdrHdIx55dWeai5XxzM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZKhMlGzg; 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="ZKhMlGzg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B34A6C4CEF1; Fri, 9 May 2025 10:26:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746786382; bh=5W5KUoJ3iZpfXplEUqQaQMHWFuiUtasGtEN3sJaZv/s=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=ZKhMlGzgabUo0uZsKxFb5iBOQf9xGb7dKhLz9WyS9EoIzJ2/0BoEvhzAHTxpEPiBw TnPPdoA4N8uwke23kmMQRvAkk3RQbj2/yFOYFI0ZxYpFr0QX9BK2EgULPPLm3kQ9ih SH4Xaz9NQuJqH1aIad6Kz5zekafeK2NhlVuxVq8sEvinSv1abLVp8LyTD8DXmZBrhc teU1BLLL6pTIhGnl+6cRCNrR1N4ZpPlaqYTWCkOQ0wfHfJma8P2rLxqsdStmc51d2T cMXPZVIqKc6htcGHg/wDXSBaVvMXm3De9hnBUqD9BcWg7UbsA35VBG2fSp26uRaYlU lSRGeu/DjihRA== From: Christian Brauner Date: Fri, 09 May 2025 12:25:38 +0200 Subject: [PATCH v5 6/9] 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: <20250509-work-coredump-socket-v5-6-23c5b14df1bc@kernel.org> References: <20250509-work-coredump-socket-v5-0-23c5b14df1bc@kernel.org> In-Reply-To: <20250509-work-coredump-socket-v5-0-23c5b14df1bc@kernel.org> To: linux-fsdevel@vger.kernel.org, Jann Horn , Daniel Borkmann , Kuniyuki Iwashima 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, linux-security-module@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=5W5KUoJ3iZpfXplEUqQaQMHWFuiUtasGtEN3sJaZv/s=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWTI3tBSaOK8ZztrWXDmhOKTnRti57117/yy92L+/kT/s D0z3vl/6yhlYRDjYpAVU2RxaDcJl1vOU7HZKFMDZg4rE8gQBi5OAZiI2zZGhvN/0sJXa5j3ndfd I7jyg3Dx0jxV1QMNl8rMtPlzJ/qcWMvIcH1ydpAgU+u7JdwxzvOnnd98lzWnT9txl4/+KY9O0W+ buAE= 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 ff42688ec9ac..fa50a681b225 100644 --- a/fs/coredump.c +++ b/fs/coredump.c @@ -1263,6 +1263,12 @@ 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[] = { { @@ -1306,6 +1312,13 @@ 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