From patchwork Thu Aug 26 16:20:10 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 12460119 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D83A4C25AF2 for ; Thu, 26 Aug 2021 16:20:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BDA73611C4 for ; Thu, 26 Aug 2021 16:20:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243122AbhHZQVZ (ORCPT ); Thu, 26 Aug 2021 12:21:25 -0400 Received: from mail.kernel.org ([198.145.29.99]:44914 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243156AbhHZQVW (ORCPT ); Thu, 26 Aug 2021 12:21:22 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 88B9361158; Thu, 26 Aug 2021 16:20:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1629994835; bh=nuQtk0V9pCocll+wu2WF2Xhw6qg/B/2QFm/xZCRt9m8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=S9RKbnZBF8llJp19vHrzjUokXMSfXqPlaqSQVtDCWSpUBtHykIpztD3CUzGrIwx0H mBG+VVyE4nWVXfERvCzXC9Wj3dJqmsf7fgcvCDTmLLG26ms9Ng8qJTgr865DmNQUjE LDSfpaj+M1dLdHrJcqrmr2TYuvap2LeYRksnBCARgq3DwyRgnOcW46z26WyQ/xenSa frhUqm2tphPLrsGApgAmVZILJdb892T1iw3p/zdOcpiljXF3Z1M98Kc4+IBYZ1acmI nvy5q9rZzawcx3KHpqZNV5x73a5Z2IJ4HukKUN7XFue2FNFG6VBOxKhFrU3JqJilSu anMN8XEf/s6qg== From: Jeff Layton To: ceph-devel@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, linux-fscrypt@vger.kernel.org, dhowells@redhat.com, xiubli@redhat.com, lhenriques@suse.de, khiremat@redhat.com, ebiggers@kernel.org Subject: [RFC PATCH v8 20/24] ceph: add fscrypt support to ceph_fill_trace Date: Thu, 26 Aug 2021 12:20:10 -0400 Message-Id: <20210826162014.73464-21-jlayton@kernel.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210826162014.73464-1-jlayton@kernel.org> References: <20210826162014.73464-1-jlayton@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fscrypt@vger.kernel.org When we get a dentry in a trace, decrypt the name so we can properly instantiate the dentry. Signed-off-by: Jeff Layton --- fs/ceph/inode.c | 30 ++++++++++++++++++++++++++++-- 1 file changed, 28 insertions(+), 2 deletions(-) diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 3cb941fc334c..b8abbb0cdb83 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -1395,8 +1395,15 @@ int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req) if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME && test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { + bool is_nokey = false; struct qstr dname; struct dentry *dn, *parent; + struct fscrypt_str oname = FSTR_INIT(NULL, 0); + struct ceph_fname fname = { .dir = dir, + .name = rinfo->dname, + .ctext = rinfo->altname, + .name_len = rinfo->dname_len, + .ctext_len = rinfo->altname_len }; BUG_ON(!rinfo->head->is_target); BUG_ON(req->r_dentry); @@ -1404,8 +1411,20 @@ int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req) parent = d_find_any_alias(dir); BUG_ON(!parent); - dname.name = rinfo->dname; - dname.len = rinfo->dname_len; + err = ceph_fname_alloc_buffer(dir, &oname); + if (err < 0) { + dput(parent); + goto done; + } + + err = ceph_fname_to_usr(&fname, NULL, &oname, &is_nokey); + if (err < 0) { + dput(parent); + ceph_fname_free_buffer(dir, &oname); + goto done; + } + dname.name = oname.name; + dname.len = oname.len; dname.hash = full_name_hash(parent, dname.name, dname.len); tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); @@ -1420,9 +1439,15 @@ int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req) dname.len, dname.name, dn); if (!dn) { dput(parent); + ceph_fname_free_buffer(dir, &oname); err = -ENOMEM; goto done; } + if (is_nokey) { + spin_lock(&dn->d_lock); + dn->d_flags |= DCACHE_NOKEY_NAME; + spin_unlock(&dn->d_lock); + } err = 0; } else if (d_really_is_positive(dn) && (ceph_ino(d_inode(dn)) != tvino.ino || @@ -1434,6 +1459,7 @@ int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req) dput(dn); goto retry_lookup; } + ceph_fname_free_buffer(dir, &oname); req->r_dentry = dn; dput(parent);