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{ "id": 23252, "url": "https://patchwork.libcamera.org/api/covers/23252/?format=api", "web_url": "https://patchwork.libcamera.org/cover/23252/", "project": { "id": 1, "url": "https://patchwork.libcamera.org/api/projects/1/?format=api", "name": "libcamera", "link_name": "libcamera", "list_id": "libcamera_core", "list_email": "libcamera-devel@lists.libcamera.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20250424114103.451395-1-barnabas.pocze@ideasonboard.com>", "date": "2025-04-24T11:40:54", "name": "[RFC,v5,0/9] libcamera: process: Remove `ProcessManager` singleton", "submitter": { "id": 216, "url": "https://patchwork.libcamera.org/api/people/216/?format=api", "name": "Barnabás Pőcze", "email": "barnabas.pocze@ideasonboard.com" }, "mbox": "https://patchwork.libcamera.org/cover/23252/mbox/", "series": [ { "id": 5145, "url": "https://patchwork.libcamera.org/api/series/5145/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=5145", "date": "2025-04-24T11:40:54", "name": "libcamera: process: Remove `ProcessManager` singleton", "version": 5, "mbox": "https://patchwork.libcamera.org/series/5145/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/covers/23252/comments/", "headers": { "Return-Path": "<libcamera-devel-bounces@lists.libcamera.org>", "X-Original-To": "parsemail@patchwork.libcamera.org", "Delivered-To": "parsemail@patchwork.libcamera.org", "Received": [ "from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 0B07AC327D\n\tfor <parsemail@patchwork.libcamera.org>;\n\tThu, 24 Apr 2025 11:41:11 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id CA06C68ADA;\n\tThu, 24 Apr 2025 13:41:09 +0200 (CEST)", "from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 461C068ACC\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tThu, 24 Apr 2025 13:41:07 +0200 (CEST)", "from pb-laptop.local (185.221.143.16.nat.pool.zt.hu\n\t[185.221.143.16])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id E1CF7F01\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tThu, 24 Apr 2025 13:41:04 +0200 (CEST)" ], "Authentication-Results": "lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"UwOkyl3m\"; dkim-atps=neutral", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1745494865;\n\tbh=LJ/uVHH/4VdrTBZ9Lra9dio0aABzsV2WrYg7Z6h9dJ0=;\n\th=From:To:Subject:Date:From;\n\tb=UwOkyl3mNPL/x6VWjfbL8JbPZQPtQszbTJBqfVRdFvEbC5cPjOnTFe4rpDdkLTG6g\n\tC9yZupfV4QgcgfWzj7AHE0+kwIyZtCJFotfWoPhK4Ih87uoQC4u2UauSq7VfALZ6eP\n\tiGUmmCE4JrPqawDCZj96B/jMdLjEQ98zJTFbcisw=", "From": "=?utf-8?q?Barnab=C3=A1s_P=C5=91cze?= <barnabas.pocze@ideasonboard.com>", "To": "libcamera-devel@lists.libcamera.org", "Subject": "[RFC PATCH v5 0/9] libcamera: process: Remove `ProcessManager`\n\tsingleton", "Date": "Thu, 24 Apr 2025 13:40:54 +0200", "Message-ID": "<20250424114103.451395-1-barnabas.pocze@ideasonboard.com>", "X-Mailer": "git-send-email 2.49.0", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8bit", "X-BeenThere": "libcamera-devel@lists.libcamera.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "<libcamera-devel.lists.libcamera.org>", "List-Unsubscribe": "<https://lists.libcamera.org/options/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=unsubscribe>", "List-Archive": "<https://lists.libcamera.org/pipermail/libcamera-devel/>", "List-Post": "<mailto:libcamera-devel@lists.libcamera.org>", "List-Help": "<mailto:libcamera-devel-request@lists.libcamera.org?subject=help>", "List-Subscribe": "<https://lists.libcamera.org/listinfo/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=subscribe>", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "The main goal is to remove the need for the ProcessManager singleton. That\nis achieved by using pidfd + clone3(), which raises the minimum\nkernel version to 5.4. There are also additional misc. changes.\n\nchanges in v5:\n * send the actually intended version...\n\nchanges in v4:\n * address review comments\n\nv4: https://patchwork.libcamera.org/cover/23242/\nv3: https://patchwork.libcamera.org/cover/23013/\nv2: https://patchwork.libcamera.org/patch/22609/\nv1: https://patchwork.libcamera.org/patch/22522/\n\nBarnabás Pőcze (9):\n libcamera: process: Disable copy/move\n libcamera: process: Misc. cleanup around `execv()`\n libcamera: process: Use `pid_` member to decide if running\n libcamera: process: Return error if already running\n libcamera: process: Ensure that file descriptors are nonnegative\n libcamera: process: Use span instead of vector\n libcamera: process: Move `closeAllFdsExcept()`\n libcamera: process: Use `close_range()` when available\n libcamera: process: Remove `ProcessManager` singleton\n\n include/libcamera/internal/camera_manager.h | 1 -\n include/libcamera/internal/process.h | 45 +--\n meson.build | 6 +-\n src/libcamera/ipc_pipe_unixsocket.cpp | 9 +-\n src/libcamera/process.cpp | 312 +++++++-------------\n test/ipc/unixsocket_ipc.cpp | 2 -\n test/log/log_process.cpp | 2 -\n test/process/process_test.cpp | 7 +-\n 8 files changed, 124 insertions(+), 260 deletions(-)\n\n--\n2.49.0" }