From patchwork Mon Sep 14 19:17:06 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 11774703 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BD511746 for ; Mon, 14 Sep 2020 19:18:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9ACBF2193E for ; Mon, 14 Sep 2020 19:18:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600111128; bh=xpVBrva7sRk+AFgfdr5dXav+n0Np8UjCF1m/n4gOajU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=RdSmO5rTrPu+S6gAD+TM8ZUrEkbBR9VMwI7R2lRlo9CLmCY8KTgJZFLiylAdzeL+y PslU6qD0zqNCgeD8gqzVW46LQi5ib/Bk2QHaA5sTS4QbJXNCAsnekcatimmviycfBO OpZ0/UM9D5ORqnCdBkAiH8kvXIMH+8ecye86SGOQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726043AbgINTSe (ORCPT ); Mon, 14 Sep 2020 15:18:34 -0400 Received: from mail.kernel.org ([198.145.29.99]:38984 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726022AbgINTRW (ORCPT ); Mon, 14 Sep 2020 15:17:22 -0400 Received: from tleilax.com (68-20-15-154.lightspeed.rlghnc.sbcglobal.net [68.20.15.154]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0FFB6221E7; Mon, 14 Sep 2020 19:17:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600111039; bh=xpVBrva7sRk+AFgfdr5dXav+n0Np8UjCF1m/n4gOajU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pbv2ey8AyBXtMjz8nIgwnxwVK+1lWIHLaklJf3eqxWgzHaGne8oXJPBMasleJ4nL9 2nmjR+WlzJccwhNC/eoiUkQrutGK+WdC1PPeFdhp/KEbLreafSARm09ABr2XeUVIzv ifX2tR9ggCGUSJNAjR+R/OVvDL7qJycxkKNcIBXY= From: Jeff Layton To: ceph-devel@vger.kernel.org, linux-fscrypt@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org Subject: [RFC PATCH v3 15/16] ceph: add fscrypt support to ceph_fill_trace Date: Mon, 14 Sep 2020 15:17:06 -0400 Message-Id: <20200914191707.380444-16-jlayton@kernel.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200914191707.380444-1-jlayton@kernel.org> References: <20200914191707.380444-1-jlayton@kernel.org> MIME-Version: 1.0 Sender: linux-fscrypt-owner@vger.kernel.org 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 | 26 ++++++++++++++++++++++++-- 1 file changed, 24 insertions(+), 2 deletions(-) diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index c3a7a9f5603d..8e9fb1311bb8 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -1331,8 +1331,10 @@ 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); BUG_ON(!rinfo->head->is_target); BUG_ON(req->r_dentry); @@ -1340,8 +1342,21 @@ 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(dir, rinfo->dname, rinfo->dname_len, 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); @@ -1356,9 +1371,15 @@ 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_ENCRYPTED_NAME; + spin_unlock(&dn->d_lock); + } err = 0; } else if (d_really_is_positive(dn) && (ceph_ino(d_inode(dn)) != tvino.ino || @@ -1370,6 +1391,7 @@ 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);