From patchwork Wed Dec 31 22:29:33 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Glass X-Patchwork-Id: 82 Return-Path: X-Original-To: u-boot-concept@u-boot.org Delivered-To: u-boot-concept@u-boot.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=u-boot.org; s=default; t=1767220228; bh=Mm9erJAB9UXdhEcOgx/z0fJfXb7LBYJL6jm3UTgvC4g=; h=From:To:Date:CC:Subject:List-Id:List-Archive:List-Help:List-Owner: List-Post:List-Subscribe:List-Unsubscribe:From; b=AqYu5iQLWiHqAyKbG7w+MkTVnfvBtbJ+N63JCvEWXdbZSfmlv7x/YyjuRpdWchqvJ n0f8+T6xkdqQTL00IG+Ox7525V01UE/bJDNDx4wPfh1KdWLiUlvm2qt1EKpR+i2bEv ysPWBLCMjciiBFb731Qgo/4+RCsu5kUyGjDxXHYuumxiMqiUElXbHXPeC1pDwaErnu HaWL9R4a7oCQC6RvPdvaGR2yo8jzT9LmAG/UL1GWP7BruLK2KS4iajlXAgiGk34hVL yXY8o2xni7Md7nlpG2CvXYmil7SilnG5Nwc0BfRIoo6duocaGdDHtssyFu1H8n0hGp wbcmpffpEFaZQ== Received: from localhost (localhost [127.0.0.1]) by mail.u-boot.org (Postfix) with ESMTP id 1F4DF68FC2 for ; Wed, 31 Dec 2025 15:30:28 -0700 (MST) X-Virus-Scanned: Debian amavis at Received: from mail.u-boot.org ([127.0.0.1]) by localhost (mail.u-boot.org [127.0.0.1]) (amavis, port 10024) with ESMTP id c-MeUL7Y0xNs for ; Wed, 31 Dec 2025 15:30:28 -0700 (MST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=u-boot.org; s=default; t=1767220228; bh=Mm9erJAB9UXdhEcOgx/z0fJfXb7LBYJL6jm3UTgvC4g=; h=From:To:Date:CC:Subject:List-Id:List-Archive:List-Help:List-Owner: List-Post:List-Subscribe:List-Unsubscribe:From; b=AqYu5iQLWiHqAyKbG7w+MkTVnfvBtbJ+N63JCvEWXdbZSfmlv7x/YyjuRpdWchqvJ n0f8+T6xkdqQTL00IG+Ox7525V01UE/bJDNDx4wPfh1KdWLiUlvm2qt1EKpR+i2bEv ysPWBLCMjciiBFb731Qgo/4+RCsu5kUyGjDxXHYuumxiMqiUElXbHXPeC1pDwaErnu HaWL9R4a7oCQC6RvPdvaGR2yo8jzT9LmAG/UL1GWP7BruLK2KS4iajlXAgiGk34hVL yXY8o2xni7Md7nlpG2CvXYmil7SilnG5Nwc0BfRIoo6duocaGdDHtssyFu1H8n0hGp wbcmpffpEFaZQ== Received: from mail.u-boot.org (localhost [127.0.0.1]) by mail.u-boot.org (Postfix) with ESMTP id 0DCF768F65 for ; Wed, 31 Dec 2025 15:30:28 -0700 (MST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=u-boot.org; s=default; t=1767220225; bh=3nduFpwjmdMyQ58gU9r9G9U7b+6J+puLHdFbM5FwJek=; h=From:To:Cc:Subject:Date:From; b=MsWDCpM5fxdHcXnUJXN1W2Che7ZQOwUh9dAhF/9bLvxrE9r9b1c5tAVrpp4oQCwRp CHJjLqxR337UkQRfQ8lVU3vmZHGr+y+IJtAWXB048LUNJxJTp3Y+MoIcG2Spo5M8wh oXCYkmsL7sUX98WkKwEBeFNalVqqcr5eyHq7yUl4ZYoVbS1zY/LQkTJvNAAp4KN4DT sugxDrJFZ+1mAYymJxI2Um5uaxgATQENHolgPC6no9tF+g3H7L0fCCwCy6t2tMNZZn ZT7dCEbKG6gzMXySAcnBXr/OhXP8YY9kMbKcLqbB12g5esBHjINEpTERruD7gP9SEp I3u3tjpVHTVtQ== Received: from localhost (localhost [127.0.0.1]) by mail.u-boot.org (Postfix) with ESMTP id 8345468F65; Wed, 31 Dec 2025 15:30:25 -0700 (MST) X-Virus-Scanned: Debian amavis at Received: from mail.u-boot.org ([127.0.0.1]) by localhost (mail.u-boot.org [127.0.0.1]) (amavis, port 10026) with ESMTP id CS96RIn5OihS; Wed, 31 Dec 2025 15:30:25 -0700 (MST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=u-boot.org; s=default; t=1767220221; bh=5Dakde1WVSK0tlHZeg7DB7jLPnweTkDB+jRjm2XsALY=; h=From:To:Cc:Subject:Date:From; b=u0cVPuu/RkEmgNg8gdGm2N/3pxZtq/w94dKsXg+VSwg/npM0IaqpyaBHLYHVe8wZ8 00S6l5miw7U06oVm3Teos4JDBbH5PuBeRQg8rimQf8LOs/9WSIj/g87W9xduSwYPPr Y40xJKm5WENM28SelNn49JSZy5o/kV7pTZYh2UKrWHhA/Ixb54dFeAf9vfyYW/iQxz AAJMifeHVGoEVDVbuqHRnGAemBLiluErwDGnvTyRc7PB+4q27BJDc3VdtOpdKOCd8E kMW39ZuYaPCcPJqkWkTjfwCDojFoqXPQSTJQY3bj+bl3BoC8sFj5Udh7eTjaDUnVtY zNCyrBhstmbJg== Received: from u-boot.org (unknown [73.34.74.121]) by mail.u-boot.org (Postfix) with ESMTPSA id DC6D368C5D; Wed, 31 Dec 2025 15:30:20 -0700 (MST) From: Simon Glass To: U-Boot Concept Date: Wed, 31 Dec 2025 15:29:33 -0700 Message-ID: <20251231223008.3251711-1-sjg@u-boot.org> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Message-ID-Hash: WPT36KH7U5VTF3ZPOWOMQHZKA32MDQJB X-Message-ID-Hash: WPT36KH7U5VTF3ZPOWOMQHZKA32MDQJB X-MailFrom: sjg@u-boot.org X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; emergency; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: Heinrich Schuchardt , Simon Glass X-Mailman-Version: 3.3.10 Precedence: list Subject: [Concept] [PATCH 00/26] ext4l: Add write support (part L) List-Id: Discussion and patches related to U-Boot Concept Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: Simon Glass This series adds write support to the new ext4l filesystem driver, supporting file creation, modification, and deletion. The main additions are: - File write with journalling support - File deletion (unlink) - Directory creation (mkdir) - Symbolic link creation (ln) - File and directory rename Infrastructure improvements include proper cleanup of journal references when unmounting, safeguards to handle probe without explicit close, and prevention of use-after-free issues with buffer_heads that have active journal_heads. The series also enables ext4l for sandbox testing and allows the use of metadata_csum checksums which the existing ext4 driver does not support. Some other tweaks are included: - a fix for mcheck to avoid filling up pre-relocation malloc() - use the correct logo for readthedocs - add a flag to avoid using the video console in tests - a fallback option for finding persistent data-dir At this point ext4l is useable, but there is more work needed, including: - Add MAINTAINERS entry - Add more Kconfig options for various features (to reduce code size) - Enable for ARM and x86 targets - Documentation - Tests for failure cases (to check that the journal is doing its job) Simon Glass (26): sandbox: os: Check executable directory for persistent files sandbox: Add --quiet_vidconsole option to speed up output doc: Correct the U-Boot logo blkmap: Handle read-only slices in write path mcheck: Add Kconfig option for caller string length mcheck: Skip mcheck overhead for pre-relocation allocations Revert "lib: Add CONFIG_LIB_KMEM_CACHE for full kmem_cache support" ext4l: Move message buffer functions to support.c ext4l: Add inode-tracking lists ext4l: Fix a few problems with handling bh_cache ext4l: Clean up fully when unmounting ext4l: Remove duplicate atomic_add declarations ext4l: Use the real crc16 implementation ext4l: Add a few Kconfig dependencies ext4l: Add bh_cache_release_jbd() to clean up journal references ext4l: Add safeguard to close previous mount in probe ext4l: Prevent freeing buffer_heads with active journal_heads ext4l: Add support for read-only devices ext4l: Add write support ext4l: Add unlink support for file deletion ext4l: Add mkdir support for directory creation ext4l: Add symlink support ext4l: Update symlink to replace existing files ext4l: Add rename support test: fs_helper: Keep metadata_csum enabled for ext4l sandbox: Enable CONFIG_FS_EXT4L Kconfig | 11 + arch/sandbox/cpu/os.c | 27 +- arch/sandbox/cpu/start.c | 10 + arch/sandbox/include/asm/state.h | 1 + board/sandbox/sandbox.c | 16 + common/dlmalloc.c | 33 +- common/mcheck_core.inc.h | 5 +- configs/sandbox_defconfig | 2 + doc/arch/sandbox/sandbox.rst | 7 + doc/conf.py | 2 +- drivers/block/blkmap.c | 3 + fs/ext4l/Kconfig | 3 + fs/ext4l/ext4.h | 6 + fs/ext4l/ext4_uboot.h | 32 +- fs/ext4l/interface.c | 679 ++++++++++++++++++++++++++-- fs/ext4l/stub.c | 8 +- fs/ext4l/super.c | 25 +- fs/ext4l/support.c | 130 +++++- fs/fs_legacy.c | 10 +- include/ext4l.h | 67 +++ include/linux/fs.h | 1 + include/linux/slab.h | 27 +- lib/Kconfig | 8 - lib/Makefile | 1 - lib/kmem_cache.c | 20 - test/fs/ext4l.c | 251 ++++++++++ test/py/tests/fs_helper.py | 13 +- test/py/tests/test_event_dump.py | 1 + test/py/tests/test_fs/test_ext4l.py | 25 + tools/logos/u-boot-logo-text.svg | Bin 0 -> 8552 bytes 30 files changed, 1287 insertions(+), 137 deletions(-) delete mode 100644 lib/kmem_cache.c create mode 100644 tools/logos/u-boot-logo-text.svg