From patchwork Fri Mar 15 16:52:54 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 13593738 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 13DE553383; Fri, 15 Mar 2024 16:53:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710521597; cv=none; b=GxF64s2MEkDKAlJCLRRSJ9O7HmVmCh/rvjozEUe3nPLxITrvTucjw7LaAuc3A1kPOo7qH4XP9yWW74z1g4CuJszrOKiKIX22U+bThLBENlt/o+AReiITw0V1kF+dbEt64eMB/T6+9I7Qh+Oh67i6NCcPYvUwh+fPrMnhZDwBbGc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710521597; c=relaxed/simple; bh=fKwiuKl53KobzjbKSb1MXdgcO5uYAnMu6jBhF4A2PpI=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=dRvo652+pvgffeAqghjyTai9nqlgCXD82TX++JQAaqQYpIvj8aTE/RuKXhgABJ/KGXU0Mu1vZZAUMWghOGadOTLYrLsSfq7+631JHplKlsefn/zIxbEBKpUC4eq/wpKAJ7Z61yp81aWg+qnkakAQxeAXV7hVYumO93X6vYJE8Os= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=g11P8Vlm; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="g11P8Vlm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A520CC4166A; Fri, 15 Mar 2024 16:53:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1710521596; bh=fKwiuKl53KobzjbKSb1MXdgcO5uYAnMu6jBhF4A2PpI=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=g11P8Vlm2QTCw1CH+0YoJtXmCt+YyoAw2XSXSSmPSO+8uzsTW2Vvu9hzzwBraEYJp eeQ8X1IXqvmNKGcBNgRCV4Vj8gS7pERvhzS14SVld3HYTeWjZV0h3qLmmluZmsrmL0 lqkZdL0GWfZsXLbs8bQuufw03lN7aDpSS1mjc7Sejie7mIbAScfPRDyrsa3B3ZVZqx /WwsawQl6/lBGsFlZe6Dh/jOJS5Kmh8P8yCsQmomMt6OsfIjE8ymc1mqKTOuqtmxix /Jh6A6vl0GZvHzqQ+vRQ/+nng7bZKnPBdXD9K3lmVPWwiHHjPjTmGJtAPQ9i46pCEC JQrfg/IMuZx6Q== From: Jeff Layton Date: Fri, 15 Mar 2024 12:52:54 -0400 Subject: [PATCH RFC 03/24] vfs: add try_break_deleg calls for parents to vfs_{link,rename,unlink} Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240315-dir-deleg-v1-3-a1d6209a3654@kernel.org> References: <20240315-dir-deleg-v1-0-a1d6209a3654@kernel.org> In-Reply-To: <20240315-dir-deleg-v1-0-a1d6209a3654@kernel.org> To: Alexander Viro , Christian Brauner , Jan Kara , Chuck Lever , Alexander Aring , Trond Myklebust , Anna Schumaker , Steve French , Paulo Alcantara , Ronnie Sahlberg , Shyam Prasad N , Tom Talpey , Greg Kroah-Hartman , "Rafael J. Wysocki" , David Howells , Tyler Hicks , Neil Brown , Olga Kornievskaia , Dai Ngo , Miklos Szeredi , Amir Goldstein , Namjae Jeon , Sergey Senozhatsky , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, netfs@lists.linux.dev, ecryptfs@vger.kernel.org, linux-unionfs@vger.kernel.org, netdev@vger.kernel.org, Jeff Layton X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=1924; i=jlayton@kernel.org; h=from:subject:message-id; bh=fKwiuKl53KobzjbKSb1MXdgcO5uYAnMu6jBhF4A2PpI=; b=owEBbQKS/ZANAwAIAQAOaEEZVoIVAcsmYgBl9HzsfnDeU1npZ9UPd6x10BjoUFU4+T+gGmHrG pQmiDL15LCJAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCZfR87AAKCRAADmhBGVaC FSfZD/sHqk1hYBvTn5PMwdUn2UqE4oW7xjGgxauc2340L4WCReb3aBWqjBHXlnJp4KFoJlCF8/R CY4BOYfemuI1eHF7hDnuLNdqA5T9SIspmGjKDBnpFYsbwN5w/+iG14qbGkbvib7PJwIa+BVHoIW 7X5C6Ymhe9esmQ6Jxa15ZznmII+UCZsOIfEOtEvoWtKlGccvKkYnCsJQUPUvW/pkku6z+HAxT4a Q0Av79s8GFcU+Bk1DaU7AILv3sLz0zDECwM57TaUxfIFr5epPFmYDI/f8m6+ArFd94UeQJL69bH PvhGPth7Pssc0zFSqcLs+A3vLPGlvMHaYXoxW35roYab4rjwke4CKmujzgVT92JZRTdzj7XdPOX lg6fYZBJqgOuNGCeEHu1TAK+caqKJht7/zNrChpMFUp6zzKJDbJldLplPSsNcbpBB6iax3fXGxF Uklmy8p7Ebz0AJjGGASCaBr/vbIhTzZbNvNjHsfTuHMB4r9anPCTlqCoDOTVOk9nm285gZItuib 41cdQBAXvpZKsFhcJcsYjUuwZnO8ex9gSI5V6FiRb0uiugwr+vRmU65EDYxhcYHwRFCdjtA+68G iGtvhqN4sQA8lQhNYQd9ZAvMfqeC5X8PPEC9EAs4Kf/i+RTl6sThgvMpbizXcaA4TO+HpExKJUa Qlqa4vWYaEEsB5w== X-Developer-Key: i=jlayton@kernel.org; a=openpgp; fpr=4BC0D7B24471B2A184EAF5D3000E684119568215 In order to add directory delegation support, we need to break delegations on the parent whenever there is going to be a change in the directory. vfs_link, vfs_unlink, and vfs_rename all have existing delegation break handling for the children in the rename. Add the necessary calls for breaking delegations in the parent(s) as well. Signed-off-by: Jeff Layton --- fs/namei.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) diff --git a/fs/namei.c b/fs/namei.c index 9342fa6a38c2..56d3ebed7bac 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -4332,6 +4332,9 @@ int vfs_unlink(struct mnt_idmap *idmap, struct inode *dir, else { error = security_inode_unlink(dir, dentry); if (!error) { + error = try_break_deleg(dir, delegated_inode); + if (error) + goto out; error = try_break_deleg(target, delegated_inode); if (error) goto out; @@ -4603,9 +4606,12 @@ int vfs_link(struct dentry *old_dentry, struct mnt_idmap *idmap, else if (max_links && inode->i_nlink >= max_links) error = -EMLINK; else { - error = try_break_deleg(inode, delegated_inode); - if (!error) - error = dir->i_op->link(old_dentry, dir, new_dentry); + error = try_break_deleg(dir, delegated_inode); + if (!error) { + error = try_break_deleg(inode, delegated_inode); + if (!error) + error = dir->i_op->link(old_dentry, dir, new_dentry); + } } if (!error && (inode->i_state & I_LINKABLE)) { @@ -4870,6 +4876,14 @@ int vfs_rename(struct renamedata *rd) old_dir->i_nlink >= max_links) goto out; } + error = try_break_deleg(old_dir, delegated_inode); + if (error) + goto out; + if (new_dir != old_dir) { + error = try_break_deleg(new_dir, delegated_inode); + if (error) + goto out; + } if (!is_dir) { error = try_break_deleg(source, delegated_inode); if (error)