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Thu, 14 Apr 2022 08:58:00 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwmo2C518fMJkvgSIZNYPn2VNG8uezGZg0k0kfVj2+yshHAhVcKQOfdxMrSryIAwaz0TiHbDQ== X-Received: by 2002:a05:6402:e99:b0:41d:11f2:85e0 with SMTP id h25-20020a0564020e9900b0041d11f285e0mr3685650eda.339.1649951879877; Thu, 14 Apr 2022 08:57:59 -0700 (PDT) Received: from arighi-desktop.homenet.telecomitalia.it ([2001:67c:1560:8007::aac:c1b6]) by smtp.gmail.com with ESMTPSA id b11-20020a17090630cb00b006e83fb1e6b1sm758456ejb.100.2022.04.14.08.57.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Apr 2022 08:57:59 -0700 (PDT) From: Andrea Righi To: kernel-team@lists.ubuntu.com Subject: [SRU][J/I][PATCH v2 0/1] re-apply missing overlayfs SAUCE patch Date: Thu, 14 Apr 2022 17:57:55 +0200 Message-Id: <20220414155756.249769-1-andrea.righi@canonical.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.20 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: "kernel-team" BugLink: https://bugs.launchpad.net/bugs/1967924 [Impact] Starting with 5.13 we've incorrectly dropped the following sauce patch: UBUNTU: SAUCE: overlayfs: fix incorrect mnt_id of files opened from map_files This patch seems to be required to use overlayfs on top of shiftfs and without this patch we may break containers that rely on shiftfs (using zfs/ceph as storage pool w/ shiftfs enabled). [Test case] No specific test case provided. [Fix] The original SAUCE patch relies on AUFS in order to use vma->vm_prfile, but we're not providing AUFS anymore in jammy,. The fix consists of re-apply this patch with a little refactoring to be dependent on CONFIG_AUFS_FS. [Regression potential] This patch is touching overlayfs, so we may see potential regressions in overlayfs. ChangeLog (v1 -> v2): - missing cover letter email Acked-by: Tim Gardner