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 BB5A8202C44; Mon, 5 May 2025 11:14:22 +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=1746443662; cv=none; b=bi7afv6jPcfuEAGdl2eagCu9fc3GpH620+8iVZmeAqGaAWEGdsCtOIKtoZNAcj4tWAF26LaSahJ/Lp/ow7az5U+GdvgSk5teHfRLF3FxGOmLDvTbQpuJn665i5291bPprCGWjRqsPY523PnagPEzcEJWcKj5ebbcgi/0j/8HUhw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746443662; c=relaxed/simple; bh=JDoGvjfCNvj7yWywk2edcAkOb6wyjmCSvk4ij427g0g=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=q8U+NCsSHlUnGjM8QByJk6mMX2evxRZwqJZ0Q8y5LSo+aoLwDQM6+p7Nt3hgiLfSkA+oINefrVf97WFI3X2ff6A8c9L3Z9gX7YLlLVkwNnayr7gGNsl6PIiWObCJ/fIImARavnOm9mdGo61cGohglFq8DdHiPQKWDIdwiIN2uKg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DMIRbq7U; 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="DMIRbq7U" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8FA65C4CEEF; Mon, 5 May 2025 11:14:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746443662; bh=JDoGvjfCNvj7yWywk2edcAkOb6wyjmCSvk4ij427g0g=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=DMIRbq7UbBsvDtQpOME71heg3tTAC1x9fshiLpU5tXxSt4onj/kFGIECIlt/n2Ivo OzXmqqvQ+FPJ+9nQAXlZLlIPDGDrGhPSq/GlYCisrxJFYQaT5+osH/nNpBmthkeuty pPlYa6t1isQ+u8Gj6fFDllr5CyaM7TsgPX1GdsVl49tp54wyL3kNQ74IxsWxJWzuny 60Oz4OAR1jH49q6Vg2Cr2IfOpl/383X2qrXJXgqxK+cwTwFrauQ4l6ss7Yy0bXE+at c0Be7r9gAg+YaI8XpOVJQJTYdDYbyKX3UqRipyDSQ3cxwZKiwjymISyyMD6h93WH9Y /AMFQuD6DjNKA== From: Christian Brauner Date: Mon, 05 May 2025 13:13:44 +0200 Subject: [PATCH RFC v3 06/10] 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: <20250505-work-coredump-socket-v3-6-e1832f0e1eae@kernel.org> References: <20250505-work-coredump-socket-v3-0-e1832f0e1eae@kernel.org> In-Reply-To: <20250505-work-coredump-socket-v3-0-e1832f0e1eae@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 , 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=JDoGvjfCNvj7yWywk2edcAkOb6wyjmCSvk4ij427g0g=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWRIzM0TXnloDmv7tsUetp3Ps45km/9T8MubsKQ9sF395 fzWm67nOkpZGMS4GGTFFFkc2k3C5ZbzVGw2ytSAmcPKBDKEgYtTACaSWs7I8GOJTu/MlTf+aV9g dXhrJnhMbu78G9vu6shOYaiafmhRVCrDP0PRSRfezLntfW/C6tP5QptuLZQIf/ky2YOvR+yZCc+ KR7wA 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 d3f12ba0f150..37dc5aa3806f 100644 --- a/fs/coredump.c +++ b/fs/coredump.c @@ -1203,6 +1203,12 @@ 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[] = { { @@ -1246,6 +1252,13 @@ 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