Commit 71a50306 authored Feb 01, 2013 by Stanislav Kinsbursky Committed by J. Bruce Fields Feb 15, 2013

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@parallels.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

parent 96d851c4

fs/nfsd/nfs4recover.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -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);
		}

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