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Message-ID: <20121206153502.30693.76374.stgit@localhost.localdomain> Date: Thu, 06 Dec 2012 18:35:02 +0300 From: Stanislav Kinsbursky <skinsbursky@...allels.com> To: bfields@...ldses.org Cc: linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org, devel@...nvz.org Subject: [PATCH 5/6] nfsd: disable usermode helper client tracker in container 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 <skinsbursky@...allels.com> --- 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); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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