From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: linux-nfs-owner@vger.kernel.org Received: from mailhub.sw.ru ([195.214.232.25]:42912 "EHLO relay.sw.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1423825Ab2LFPe3 (ORCPT ); Thu, 6 Dec 2012 10:34:29 -0500 Subject: [PATCH 5/6] nfsd: disable usermode helper client tracker in container To: bfields@fieldses.org From: Stanislav Kinsbursky Cc: linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org, devel@openvz.org Date: Thu, 06 Dec 2012 18:35:02 +0300 Message-ID: <20121206153502.30693.76374.stgit@localhost.localdomain> In-Reply-To: <20121206153204.30693.11408.stgit@localhost.localdomain> References: <20121206153204.30693.11408.stgit@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Sender: linux-nfs-owner@vger.kernel.org List-ID: This tracker uses khelper kthread to execute binaries. Execution itself is done from kthread context - i.e. global root is used. This is not suitable for containers with own root. So, disable this tracker for a while. Note: one of possible solutions can be pass "init" callback to khelper, which will swap root to desired one. Signed-off-by: Stanislav Kinsbursky --- fs/nfsd/nfs4recover.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c index ba6fdd4..e0ae1cf 100644 --- a/fs/nfsd/nfs4recover.c +++ b/fs/nfsd/nfs4recover.c @@ -1185,6 +1185,12 @@ bin_to_hex_dup(const unsigned char *src, int srclen) static int nfsd4_umh_cltrack_init(struct net __attribute__((unused)) *net) { + /* XXX: The usermode helper s not working in container yet. */ + if (net != &init_net) { + WARN(1, KERN_ERR "NFSD: attempt to initialize umh client " + "tracking in a container!\n"); + return -EINVAL; + } return nfsd4_umh_cltrack_upcall("init", NULL, NULL); }