From patchwork Thu Nov 9 08:24:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiubo Li X-Patchwork-Id: 742608 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 ED37163B2 for ; Thu, 9 Nov 2023 08:26:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="g5rZ43ri" Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3CD282D50 for ; Thu, 9 Nov 2023 00:26:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1699518406; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+/uFsFoj5WgrsQrmZ26rZrk/q8DLO3tKy2Wiy8oFYUY=; b=g5rZ43riNldmvU0QWkfTTNDEAE6UXePNo++Rhp6drfSTvgeYcDRepQPylg7fkyfWv+phrr pYvH5ki70Cj59trGYIneLDIl9QevfXmsaZm2vVf+vcLX5lkqLcHgRUqBNUkeiC86ehNEIy ltdhu7ebTNZFRZzlp1lqSvRcxNNnjho= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-690-ZRyLg_7GPsegsR7Pv6rHnw-1; Thu, 09 Nov 2023 03:26:43 -0500 X-MC-Unique: ZRyLg_7GPsegsR7Pv6rHnw-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id D3BDB803307; Thu, 9 Nov 2023 08:26:42 +0000 (UTC) Received: from li-a71a4dcc-35d1-11b2-a85c-951838863c8d.ibm.com.com (unknown [10.72.112.221]) by smtp.corp.redhat.com (Postfix) with ESMTP id B71032027019; Thu, 9 Nov 2023 08:26:36 +0000 (UTC) From: xiubli@redhat.com To: ceph-devel@vger.kernel.org Cc: idryomov@gmail.com, jlayton@kernel.org, vshankar@redhat.com, mchangir@redhat.com, Xiubo Li Subject: [PATCH 4/5] ceph: check the cephx mds auth access for open Date: Thu, 9 Nov 2023 16:24:08 +0800 Message-ID: <20231109082409.417726-5-xiubli@redhat.com> In-Reply-To: <20231109082409.417726-1-xiubli@redhat.com> References: <20231109082409.417726-1-xiubli@redhat.com> Precedence: bulk X-Mailing-List: ceph-devel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.4 From: Xiubo Li Before opening the file locally we need to check the cephx access. URL: https://tracker.ceph.com/issues/61333 Signed-off-by: Xiubo Li --- fs/ceph/file.c | 34 ++++++++++++++++++++++++++++++++-- 1 file changed, 32 insertions(+), 2 deletions(-) diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 227fc226227b..8e9178446fdd 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -365,6 +365,12 @@ int ceph_open(struct inode *inode, struct file *file) struct ceph_file_info *fi = file->private_data; int err; int flags, fmode, wanted; + struct dentry *dentry; + char *path; + int pathlen; + u64 pathbase; + bool do_sync = false; + int mask = MAY_READ; if (fi) { doutc(cl, "file %p is already opened\n", file); @@ -386,6 +392,30 @@ int ceph_open(struct inode *inode, struct file *file) fmode = ceph_flags_to_mode(flags); wanted = ceph_caps_for_mode(fmode); + if (fmode & CEPH_FILE_MODE_WR) + mask |= MAY_WRITE; + dentry = d_find_alias(inode); + if (!dentry) { + do_sync = true; + } else { + path = ceph_mdsc_build_path(mdsc, dentry, &pathlen, &pathbase, 0); + if (IS_ERR(path)) { + do_sync = true; + err = 0; + } else { + err = ceph_mds_check_access(mdsc, path, mask); + } + dput(dentry); + + /* For none EACCES cases will let the MDS do the mds auth check */ + if (err == -EACCES) { + return err; + } else if (err < 0) { + do_sync = true; + err = 0; + } + } + /* snapped files are read-only */ if (ceph_snap(inode) != CEPH_NOSNAP && (file->f_mode & FMODE_WRITE)) return -EROFS; @@ -401,7 +431,7 @@ int ceph_open(struct inode *inode, struct file *file) * asynchronously. */ spin_lock(&ci->i_ceph_lock); - if (__ceph_is_any_real_caps(ci) && + if (!do_sync && __ceph_is_any_real_caps(ci) && (((fmode & CEPH_FILE_MODE_WR) == 0) || ci->i_auth_cap)) { int mds_wanted = __ceph_caps_mds_wanted(ci, true); int issued = __ceph_caps_issued(ci, NULL); @@ -419,7 +449,7 @@ int ceph_open(struct inode *inode, struct file *file) ceph_check_caps(ci, 0); return ceph_init_file(inode, file, fmode); - } else if (ceph_snap(inode) != CEPH_NOSNAP && + } else if (!do_sync && ceph_snap(inode) != CEPH_NOSNAP && (ci->i_snap_caps & wanted) == wanted) { __ceph_touch_fmode(ci, mdsc, fmode); spin_unlock(&ci->i_ceph_lock);