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由 Daniel P. Berrange 提交于
Implement virProcessRunInMountNamespace, which runs callback of type virProcessNamespaceCallback in a container namespace. This uses a child process to run the callback, since you can't change the mount namespace of a thread. This implies that callbacks have to be careful about what code they run due to async safety rules. Idea by Dan Berrange, based on an initial report by Reco <recoverym4n@gmail.com> at http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=732394Signed-off-by: NDaniel Berrange <berrange@redhat.com> Signed-off-by: NEric Blake <eblake@redhat.com> (cherry picked from commit 7c72ef6f)
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