Re: [libvirt] [PATCH 13/23] Add JSON serialization of virNetSocketPtr objects for process re-exec()

From: "Daniel P. Berrange" <berrange(a)redhat.com&gt; Add two new APIs virNetSocketNewPostExecRestart and virNetSocketPreExecRestart which allow a virNetSocketPtr object to be created from a JSON object and saved to a JSON object, for the purpose of re-exec'ing a process. As well as saving the state in JSON format, the second method will disable the O_CLOEXEC flag so that the open file descriptors are preserved across the process re-exec()

Since it is not possible to serialize SASL or TLS encryption state, an error will be raised if attempting to perform serialization on non-raw sockets Signed-off-by: Daniel P. Berrange <berrange(a)redhat.com&gt; --- src/libvirt_private.syms | 2 + src/rpc/virnetsocket.c | 108 +++++++++++++++++++++++++++++++++++++++++++++++ src/rpc/virnetsocket.h | 6 +++ 3 files changed, 116 insertions(+)

+virNetSocketPtr virNetSocketNewPostExecRestart(virJSONValuePtr object) +{ + virSocketAddr localAddr; + virSocketAddr remoteAddr; + int fd, thepid, errfd; + bool isClient; + + if (virJSONValueObjectGetNumberInt(object, "fd", &fd) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("Missing fd data in JSON document")); + return NULL; + } + + if (virJSONValueObjectGetNumberInt(object, "pid", &thepid) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("Missing pid data in JSON document")); + return NULL; + } + + if (virJSONValueObjectGetNumberInt(object, "errfd", &errfd) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("Missing errfd data in JSON document")); + return NULL; + }