From patchwork Fri Nov 22 09:57:46 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amir Goldstein X-Patchwork-Id: 13882972 Received: from mail-ej1-f45.google.com (mail-ej1-f45.google.com [209.85.218.45]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3CD2C1D79BB; Fri, 22 Nov 2024 09:57:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.45 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732269475; cv=none; b=c49Q0J+8N6+W86LAyGla4B6fGWLWh/2Qd5AwH9mOFK0Ohj69r97QV/mJ2meU54sUFQwQweSAsvVT4FH0h92mPk38dpl5ZjOIsXxA9K7H+R4vV5Tpbsr0Iu1fE7n18VSZJusI6SgckjKRucnPv0UezaGdRyKTaOKV2RAqb3oZ/ls= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732269475; c=relaxed/simple; bh=DROrcZMktV46vS9hDs7wxjs4RZ7k0PD0goqABW4Ck0M=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=XM7wlG1gpMyi9oXNQIs2YXObqv2wyuMEyuAv0LGCT5hh8HiG7lXfN//xTdLcm6chIee2AaWjky4wBqksBandAH08T8NJFA+sObQWrMKSfB87fWaxs67loXk7Z7h0hHJvI7vhJc4CZwTCJcLXNk+NLd966Q2zNkwzleH6YIrSTWk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=famk3Dyq; arc=none smtp.client-ip=209.85.218.45 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="famk3Dyq" Received: by mail-ej1-f45.google.com with SMTP id a640c23a62f3a-a9ef275b980so306199366b.0; Fri, 22 Nov 2024 01:57:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1732269471; x=1732874271; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=z1YNjxFnMu7YgunhEkueJiGg2Ls9YnMrEIaJQYBXqDw=; b=famk3DyqqooLn+AVJMnuQTkk+x9k7D0uFoBEnTeOJmTUJf9X2LXcP6OK2/Qo+td7M4 p9N/7x9c+Awr41ewcmhutzILiAYyrBmp376FlQ58oU7Ds78evRqHQddtb0yjHiqOl+I4 FoWa7tIMEPp82PfDinHBgRK9RpUbZbo4YXXQnihA6z2cKsLmXFOKb3lzzLcKelUIgrnI PgI33VoLqUak6j48B//Y7+WyoCpjyzgy/1qU1X+wCxHZtV5DR+WD+Ga2fsvtBayuRXvf TqMoDKpcfpqpLxiKOmBsNvxuuJEjKy1+ctXkseWur3gqTuG2rAaXVMz7NAMkT51h1vQe 6m/A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1732269471; x=1732874271; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=z1YNjxFnMu7YgunhEkueJiGg2Ls9YnMrEIaJQYBXqDw=; b=f+Zl4hksWEXulQTu4LDeZLBeW7P3kLEqE74O7OMRENa50/jJ5E8dDL4VrW1pe+H7YY 0auwTRxlcGzjz19Czdb4sI8FH5uVZdeJ0anf6JOXUrO/gDxxkG4146DuCNIISIysqDti vOg+palQmqC0yP69QWjNl6i5A4uHIDI0FEC+t5St+UTJcPfrRnKFq9Cd0PCbJPqspoRL g7VKgt1xSBTwywQ8Z+EsoWPs8JokXCmAxlZSWFVKy98sRtwWGNL7v/gl6O+SUFAyCD4W YW6sXTRE8m6zYr5ABosMgGDPZZFgH9p8qazyFliX/oqBwFt+NlbHuHEm4Ge2t1kKgJct l6RQ== X-Forwarded-Encrypted: i=1; AJvYcCUM0P8N8uTrcbMAJ6Q/MPQPgr9qVqlWE+zD/excxYVDMGjKY2P2i56I3RQRHq2ZI4Rxkb7DYmMUuL1KGeqUZg==@vger.kernel.org, AJvYcCVOCuU21fN4PVEJbmaq5b24lgaMt4ei+7STrsRljg78eG37fCQXJh78OBE28+1VDBm8yYEvHxuvzyrv9qpW@vger.kernel.org, AJvYcCXetUxdz84lYpbepKVx4mAYLJHTfl0IhcS4n7mYigyN88otwZPaH+IhWT4mYVr5zDYGwh3YFInB0A1Kl+wE@vger.kernel.org X-Gm-Message-State: AOJu0Yw+2BGdc1Qc7ljjXSM8hjhjxD0A4axJKI2UJ4T3SMQkQ/N/Ph3X 6to2SwGUVNGVr5CuSfzcVgPQlkvjIbvSnRmcKauTeyiLd4bpyilf X-Gm-Gg: ASbGncvvegx3n958xIVEiK47E+Ta60GgCK7GUWU3ZLusiyI6TGO0Hp6k2Ig1xPaNWrp PMIUfn0BoaOsLNONfliqiXfikQBDfjNzHk7+lVMPRyMlfrr31VzWniZczpK7LnOZVPjz7Wtbf1G CitCkfFlA3/B6cLibzW5exCcWlWJ4HRAvwEz0HTEUg2aKGR6Vv9aEe8cnRunRNRucNG5PEOkPIA TpXmnnkmEmBsL2JyWsl4cYMuCrG8BF9xrKnvSmHDswYeULS+v3wf9SVEouwVtKM4EjaugljcLMi R3LA+jraPZTDYKlzJYLIoUl/r2DbfOpcu4GYHUKqWsVQQnc= X-Google-Smtp-Source: AGHT+IGlXtYvtFI2fCcfNTMjkok1wT9AVTZQ1CDek+TBZjQJfwlcWeDAxmdNY1dtnE+KYuSIWXrzsQ== X-Received: by 2002:a17:907:2718:b0:a99:c075:6592 with SMTP id a640c23a62f3a-aa509c0d6dbmr192813266b.56.1732269471061; Fri, 22 Nov 2024 01:57:51 -0800 (PST) Received: from amir-ThinkPad-T480.arnhem.chello.nl (92-109-99-123.cable.dynamic.v4.ziggo.nl. [92.109.99.123]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-aa50b530aa0sm77567866b.115.2024.11.22.01.57.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 Nov 2024 01:57:50 -0800 (PST) From: Amir Goldstein To: Linus Torvalds Cc: Miklos Szeredi , Christian Brauner , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-unionfs@vger.kernel.org Subject: [GIT PULL] overlayfs updates for 6.13 Date: Fri, 22 Nov 2024 10:57:46 +0100 Message-Id: <20241122095746.198762-1-amir73il@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Hi Linus, Please pull overlayfs updates for 6.13. This pull request has some changes in code outside of fs/overlayfs: 1. The backing_file API change touches fuse code - that was collaborated with Miklos who authored this API change 2. The additions of revert/override_creds_light() helpers in cred.{h,c} were collaborated with Christian who has suggested those helpers There was also an overlayfs change in this cycle coming from Christian (file descriptors based layer setup). His changes do not conflict with this branch and I have also tested his change along with the fs-next community test branch. Most of this branch has been sitting in linux-next for over a week except for one syzbot issue fix that was added three days ago. The code has gone through the usual overlayfs test routines. The branch merges cleanly with master branch of the moment. Thanks, Amir. ---------------------------------------------------------------- The following changes since commit 2d5404caa8c7bb5c4e0435f94b28834ae5456623: Linux 6.12-rc7 (2024-11-10 14:19:35 -0800) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs.git ovl-update-6.13 for you to fetch changes up to c8b359dddb418c60df1a69beea01d1b3322bfe83: ovl: Filter invalid inodes with missing lookup function (2024-11-20 10:23:04 +0100) ---------------------------------------------------------------- overlayfs updates for 6.13 - Fix a syzbot reported NULL pointer deref with bfs lower layers - Fix a copy up failure of large file from lower fuse fs - Followup cleanup of backing_file API from Miklos - Introduction and use of revert/override_creds_light() helpers, that were suggested by Christian as a mitigation to cache line bouncing and false sharing of fields in overlayfs creator_cred long lived struct cred copy. - Store up to two backing file references (upper and lower) in an ovl_file container instead of storing a single backing file in file->private_data. This is used to avoid the practice of opening a short lived backing file for the duration of some file operations and to avoid the specialized use of FDPUT_FPUT in such occasions, that was getting in the way of Al's fd_file() conversions. ---------------------------------------------------------------- Amir Goldstein (6): ovl: pass an explicit reference of creators creds to callers ovl: do not open non-data lower file for fsync ovl: allocate a container struct ovl_file for ovl private context ovl: store upper real file in ovl_file struct ovl: convert ovl_real_fdget_path() callers to ovl_real_file_path() ovl: convert ovl_real_fdget() callers to ovl_real_file() Miklos Szeredi (1): backing-file: clean up the API Oleksandr Tymoshenko (1): ovl: properly handle large files in ovl_security_fileattr Vasiliy Kovalev (1): ovl: Filter invalid inodes with missing lookup function Vinicius Costa Gomes (4): cred: Add a light version of override/revert_creds() fs/backing-file: Convert to revert/override_creds_light() ovl: use wrapper ovl_revert_creds() ovl: Optimize override/revert creds fs/backing-file.c | 53 ++++--- fs/fuse/passthrough.c | 32 +++-- fs/overlayfs/copy_up.c | 2 +- fs/overlayfs/dir.c | 68 ++++++--- fs/overlayfs/file.c | 327 +++++++++++++++++++++++++------------------ fs/overlayfs/inode.c | 27 ++-- fs/overlayfs/namei.c | 10 +- fs/overlayfs/overlayfs.h | 4 + fs/overlayfs/readdir.c | 8 +- fs/overlayfs/util.c | 14 +- fs/overlayfs/xattrs.c | 9 +- include/linux/backing-file.h | 11 +- include/linux/cred.h | 18 +++ kernel/cred.c | 6 +- 14 files changed, 352 insertions(+), 237 deletions(-)