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Fri, 06 Nov 2026 05:37:03 -0800 (PST) Received: from toxicpanda.com ([153.61.196.253]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-54e270179f0sm20538911cf.26.2026.11.06.05.37.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Nov 2026 05:37:03 -0800 (PST) From: Josef Bacik Date: Fri, 06 Nov 2026 13:36:45 +0000 Subject: [PATCH v4 3/8] ovl: make the root inode appear hashed X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261106-b4-ovl-containerized-sync-v4-3-6ddde0b7dd8a@toxicpanda.com> References: <20261106-b4-ovl-containerized-sync-v4-0-6ddde0b7dd8a@toxicpanda.com> In-Reply-To: <20261106-b4-ovl-containerized-sync-v4-0-6ddde0b7dd8a@toxicpanda.com> To: Miklos Szeredi , Amir Goldstein , Christian Brauner Cc: Alexander Viro , Jan Kara , Christoph Hellwig , Chris Mason , Chengguang Xu , linux-unionfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Josef Bacik X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=openssh-sha256; t=1793972217; l=1088; i=josef@toxicpanda.com; h=from:subject:message-id; bh=b2F4eGdbpOMxJXXK78nupdaZI/TuEjSLWoRn4Q7cKAw=; b=U1NIU0lHAAAAAQAAADMAAAALc3NoLWVkMjU1MTkAAAAgUBr36M/n0nWN0DNbnxwzIiCZez6MG JiruuNaSCI/zXsAAAAGcGF0YXR0AAAAAAAAAAZzaGE1MTIAAABTAAAAC3NzaC1lZDI1NTE5AAAA QHJ31XEy6WjwNNRqX2i98eblVslKDYOiu+4N9/wDk2vVO6TSNHfrhlaeuyrPUhIhqIPg1Ru4EWt FHgpEiohP2gA= X-Developer-Key: i=josef@toxicpanda.com; a=openssh; fpr=SHA256:C8kOX2QUJCMqnCX+KEeoqRAjLo9L+ELOSH2NSAJHqGA __mark_inode_dirty() does not put an unhashed inode on a dirty list, and the root inode of an overlay is never hashed. Use inode_fake_hash() on it, so that the following patches can track it like any other overlay inode. Signed-off-by: Josef Bacik --- fs/overlayfs/super.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index 22a8d4eb3b7c..9eb6a5e485ee 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -1371,6 +1371,11 @@ static struct dentry *ovl_get_root(struct super_block *sb, ovl_set_flag(OVL_WHITEOUTS, d_inode(root)); ovl_dentry_set_flag(OVL_E_CONNECTED, root); ovl_set_upperdata(d_inode(root)); + /* + * Nobody looks the root up by its hash, but __mark_inode_dirty() only + * puts hashed inodes on a dirty list. + */ + inode_fake_hash(d_inode(root)); ovl_inode_init(d_inode(root), &oip, ino, fsid); WARN_ON(!!IS_CASEFOLDED(d_inode(root)) != ofs->casefold); ovl_dentry_init_flags(root, upperdentry, oe, DCACHE_OP_WEAK_REVALIDATE); -- 2.55.0