From patchwork Wed Feb 7 02:19:18 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yuanhe Shu X-Patchwork-Id: 13548031 Received: from out30-98.freemail.mail.aliyun.com (out30-98.freemail.mail.aliyun.com [115.124.30.98]) (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 D7554DDC6; Wed, 7 Feb 2024 02:19:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.98 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707272397; cv=none; b=kAA22HUyGM/nZtotkpvmCc7OFhmxZKXVE77NvQuyfUoCJiMkkrerxkASY9PaOpkch1om8CUr48C5gdR22BLx3O/poMaA9E1BeTr32lzOHj6w5PNcGSANPwaM3GtY2flnqsN688USwWuCRma3qJ6dkwhZA/fDVJJPzq4V2iNzNR8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707272397; c=relaxed/simple; bh=Chp9zNiZQisqvJTCxnpUb83eLJUJnwZdDtmJwK5aEjE=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=TuI22k+YlsJc9R1PuqtoSfjjX00XT85dWQeBFYh9U8/YLwP7R3vEWT2oyfXpLv5+CT391ZfTrT5+q7q8rXpnr1e4Dl+pLVEZQ2XLSHOSH0tlQslyHMlRGJ1H+YF8Or6u707aV+PGmAbXbDEkPD7w5/iwt18+30oMKhheWz/2aIA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b=ui/tL+mc; arc=none smtp.client-ip=115.124.30.98 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b="ui/tL+mc" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1707272384; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=SzzRsuoKn9NUe6qiu7CdTsPN+rpGpZaX9D+ucZDQDig=; b=ui/tL+mcqJVOTxMOJR2kU7D5xQAgfJqpdqcg9i+yvwllD7CNjqMsXqdKR9U79+WTGuzfeG3phA6dM+8bIGLycrLt+S66IhBTwZSpZn+EOH2eeM/L+m+P+4YezubFTV6f/wGxgv4DKisR3vSx+YHe1f7nTxx8nY7q+3BgvpPwLOQ= X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R151e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045192;MF=xiangzao@linux.alibaba.com;NM=1;PH=DS;RN=11;SR=0;TI=SMTPD_---0W0F5hRE_1707272372; Received: from localhost.localdomain(mailfrom:xiangzao@linux.alibaba.com fp:SMTPD_---0W0F5hRE_1707272372) by smtp.aliyun-inc.com; Wed, 07 Feb 2024 10:19:43 +0800 From: Yuanhe Shu To: keescook@chromium.org, tony.luck@intel.com, gpiccoli@igalia.com, shuah@kernel.org, corbet@lwn.net Cc: xlpang@linux.alibaba.com, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-hardening@vger.kernel.org, linux-kselftest@vger.kernel.org, Yuanhe Shu Subject: [PATCH v3 0/3] pstore: add multi-backend support Date: Wed, 7 Feb 2024 10:19:18 +0800 Message-Id: <20240207021921.206425-1-xiangzao@linux.alibaba.com> X-Mailer: git-send-email 2.39.3 Precedence: bulk X-Mailing-List: linux-hardening@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 I have been steadily working but struggled to find a seamlessly integrated way to implement tty frontend until Guilherme inspired me that multi-backend and tty frontend are actually two separate entities. This submission presents the 3rd iteration of my efforts, listing notable changes form the v1: 1. pstore.backend no longer acts as "registered backend", but "backends eligible for registration". 2. drop subdir since it will break user space 3. drop tty frontend since I haven't yet devised a satisfactory implementation strategy Changes from v2: 1. Fix ftrace.c build error as I did not compile with CONFIG_PSTORE_FTRACE. A heartfelt thank you to Kees and Guilherme for your suggestions. I firmly believe that a tty frontend is crucial for kdump debugging, and I am still dedicating effort to develop one. Hope in the future I can accomplish it with deeper comprehension with tty driver :) Yuanhe Shu (3): pstore: add multi-backend support Documentation: adjust pstore backend related document tools/testing: adjust pstore backend related selftest Documentation/ABI/testing/pstore | 8 +- .../admin-guide/kernel-parameters.txt | 4 +- fs/pstore/ftrace.c | 31 ++- fs/pstore/inode.c | 19 +- fs/pstore/internal.h | 4 +- fs/pstore/platform.c | 225 ++++++++++++------ fs/pstore/pmsg.c | 24 +- include/linux/pstore.h | 29 +++ tools/testing/selftests/pstore/common_tests | 8 +- .../selftests/pstore/pstore_post_reboot_tests | 65 ++--- tools/testing/selftests/pstore/pstore_tests | 2 +- 11 files changed, 295 insertions(+), 124 deletions(-)