Add vmchannel serial event interface
Signed-off-by: Lon Hohberger <lon@users.sourceforge.net>
This commit is contained in:
Marek Grac
Lon Hohberger
parent
c7209147c2
commit
7446b36898
341
server/virt-serial.c
Normal file
341
server/virt-serial.c
Normal file
@ -0,0 +1,341 @@
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// #include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <signal.h>
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#include <sys/types.h>
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#include <sys/poll.h>
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#include <libvirt/libvirt.h>
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#include <libxml/xmlreader.h>
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#define DEBUG0(fmt) printf("%s:%d :: " fmt "\n", \
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__func__, __LINE__)
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#define DEBUG(fmt, ...) printf("%s:%d: " fmt "\n", \
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__func__, __LINE__, __VA_ARGS__)
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#define STREQ(a,b) (strcmp((a),(b)) == 0)
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/* handle globals */
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int h_fd = 0;
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virEventHandleType h_event = 0;
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virEventHandleCallback h_cb = NULL;
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virFreeCallback h_ff = NULL;
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void *h_opaque = NULL;
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/* timeout globals */
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#define TIMEOUT_MS 1000
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int t_active = 0;
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int t_timeout = -1;
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int dom_active = 0;
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virEventTimeoutCallback t_cb = NULL;
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virFreeCallback t_ff = NULL;
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void *t_opaque = NULL;
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virDomainPtr mojaDomain = NULL;
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/* Prototypes */
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const char *eventToString(int event);
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int myDomainEventCallback1 (virConnectPtr conn, virDomainPtr dom,
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int event, int detail, void *opaque);
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int myEventAddHandleFunc (int fd, int event,
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virEventHandleCallback cb,
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void *opaque,
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virFreeCallback ff);
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void myEventUpdateHandleFunc(int watch, int event);
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int myEventRemoveHandleFunc(int watch);
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int myEventAddTimeoutFunc(int timeout,
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virEventTimeoutCallback cb,
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void *opaque,
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virFreeCallback ff);
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void myEventUpdateTimeoutFunc(int timer, int timout);
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int myEventRemoveTimeoutFunc(int timer);
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int myEventHandleTypeToPollEvent(virEventHandleType events);
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virEventHandleType myPollEventToEventHandleType(int events);
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void usage(const char *pname);
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int myDomainEventCallback1 (virConnectPtr conn,
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virDomainPtr dom,
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int event,
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int detail,
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void *opaque)
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{
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if (event == VIR_DOMAIN_EVENT_STARTED) {
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virDomainRef(dom);
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mojaDomain = dom;
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dom_active = 1;
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}
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return 0;
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}
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static void myFreeFunc(void *opaque)
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{
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char *str = opaque;
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printf("%s: Freeing [%s]\n", __func__, str);
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free(str);
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}
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/* EventImpl Functions */
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int myEventHandleTypeToPollEvent(virEventHandleType events)
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{
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int ret = 0;
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if(events & VIR_EVENT_HANDLE_READABLE)
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ret |= POLLIN;
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if(events & VIR_EVENT_HANDLE_WRITABLE)
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ret |= POLLOUT;
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if(events & VIR_EVENT_HANDLE_ERROR)
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ret |= POLLERR;
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if(events & VIR_EVENT_HANDLE_HANGUP)
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ret |= POLLHUP;
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return ret;
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}
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virEventHandleType myPollEventToEventHandleType(int events)
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{
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virEventHandleType ret = 0;
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if(events & POLLIN)
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ret |= VIR_EVENT_HANDLE_READABLE;
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if(events & POLLOUT)
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ret |= VIR_EVENT_HANDLE_WRITABLE;
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if(events & POLLERR)
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ret |= VIR_EVENT_HANDLE_ERROR;
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if(events & POLLHUP)
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ret |= VIR_EVENT_HANDLE_HANGUP;
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return ret;
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}
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int myEventAddHandleFunc(int fd, int event,
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virEventHandleCallback cb,
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void *opaque,
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virFreeCallback ff)
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{
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DEBUG("Add handle %d %d %p %p", fd, event, cb, opaque);
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h_fd = fd;
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h_event = myEventHandleTypeToPollEvent(event);
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h_cb = cb;
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h_ff = ff;
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h_opaque = opaque;
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return 0;
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}
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void myEventUpdateHandleFunc(int fd, int event)
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{
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DEBUG("Updated Handle %d %d", fd, event);
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h_event = myEventHandleTypeToPollEvent(event);
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return;
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}
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int myEventRemoveHandleFunc(int fd)
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{
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DEBUG("Removed Handle %d", fd);
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h_fd = 0;
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if (h_ff)
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(h_ff)(h_opaque);
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return 0;
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}
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int myEventAddTimeoutFunc(int timeout,
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virEventTimeoutCallback cb,
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void *opaque,
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virFreeCallback ff)
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{
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DEBUG("Adding Timeout %d %p %p", timeout, cb, opaque);
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t_active = 1;
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t_timeout = timeout;
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t_cb = cb;
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t_ff = ff;
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t_opaque = opaque;
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return 0;
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}
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void myEventUpdateTimeoutFunc(int timer, int timeout)
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{
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/*DEBUG("Timeout updated %d %d", timer, timeout);*/
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t_timeout = timeout;
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}
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int myEventRemoveTimeoutFunc(int timer)
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{
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DEBUG("Timeout removed %d", timer);
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t_active = 0;
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if (t_ff)
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(t_ff)(t_opaque);
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return 0;
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}
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/* main test functions */
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void usage(const char *pname)
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{
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printf("%s uri\n", pname);
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}
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int run = 1;
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static void stop(int sig)
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{
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printf("Exiting on signal %d\n", sig);
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run = 0;
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}
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int main(int argc, char **argv)
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{
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int sts;
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int callback1ret = -1;
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int callback2ret = -1;
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struct sigaction action_stop = {
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.sa_handler = stop
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};
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if(argc > 1 && STREQ(argv[1],"--help")) {
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usage(argv[0]);
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return -1;
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}
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virEventRegisterImpl( myEventAddHandleFunc,
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myEventUpdateHandleFunc,
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myEventRemoveHandleFunc,
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myEventAddTimeoutFunc,
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myEventUpdateTimeoutFunc,
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myEventRemoveTimeoutFunc);
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virConnectPtr dconn = NULL;
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dconn = virConnectOpen (argv[1] ? argv[1] : NULL);
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if (!dconn) {
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printf("error opening\n");
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return -1;
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}
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sigaction(SIGTERM, &action_stop, NULL);
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sigaction(SIGINT, &action_stop, NULL);
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DEBUG0("Registering domain event cbs");
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/* Add 2 callbacks to prove this works with more than just one */
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callback1ret = virConnectDomainEventRegister(dconn, myDomainEventCallback1,
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strdup("callback 1"), myFreeFunc);
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if ((callback1ret == 0)) {
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while(run) {
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struct pollfd pfd = { .fd = h_fd,
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.events = h_event,
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.revents = 0};
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sts = poll(&pfd, 1, TIMEOUT_MS);
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if (mojaDomain && dom_active) {
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printf("NAME: %s\n", virDomainGetName(mojaDomain));
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dom_active = 0;
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printf("%s\n", virDomainGetXMLDesc(mojaDomain, 0));
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char *xml = virDomainGetXMLDesc(mojaDomain, 0);
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// @todo: free mojaDomain
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// parseXML output
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xmlDocPtr doc;
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xmlNodePtr cur;
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doc = xmlParseMemory(xml, strlen(xml));
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cur = xmlDocGetRootElement(doc);
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if (cur == NULL) {
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fprintf(stderr, "Empty doc\n");
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xmlFreeDoc(doc);
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return 1;
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}
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if (!xmlStrcmp(cur->name, (const xmlChar *) "domain")) {
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xmlNodePtr devices = cur->xmlChildrenNode;
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while (devices != NULL) {
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if (!xmlStrcmp(devices->name, (const xmlChar *) "devices")) {
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xmlNodePtr child = devices->xmlChildrenNode;
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while (child != NULL) {
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if (!xmlStrcmp(child->name, (const xmlChar *) "serial")) {
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xmlAttrPtr attr = xmlHasProp(child, "type");
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if (attr == NULL) continue;
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if (!xmlStrcmp(attr->children->content, (const xmlChar *) "unix")) {
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xmlNodePtr serial = child->xmlChildrenNode;
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while (serial != NULL) {
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if (!xmlStrcmp(serial->name, (const xmlChar *) "source")) {
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xmlAttrPtr attr_mode = xmlHasProp(serial, "mode");
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xmlAttrPtr attr_path = xmlHasProp(serial, "path");
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if ((attr_path != NULL) && (attr_mode != NULL) && (!xmlStrcmp(attr_mode->children->content, (const xmlChar *) "bind"))) {
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printf(">> IFILE >> %s\n", attr_path->children->content);
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}
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}
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serial = serial->next;
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}
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}
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}
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child = child->next;
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}
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}
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devices = devices->next;
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}
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xmlFreeDoc(doc);
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return;
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}
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}
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/* We are assuming timeout of 0 here - so execute every time */
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if(t_cb && t_active) {
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t_cb(t_timeout,t_opaque);
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}
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if (sts == 0) {
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/* DEBUG0("Poll timeout"); */
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continue;
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}
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if (sts < 0 ) {
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DEBUG0("Poll failed");
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continue;
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}
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if ( pfd.revents & POLLHUP ) {
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DEBUG0("Reset by peer");
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return -1;
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}
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if(h_cb) {
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h_cb(0,
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h_fd,
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myPollEventToEventHandleType(pfd.revents & h_event),
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h_opaque);
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}
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}
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DEBUG0("Deregistering event handlers");
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virConnectDomainEventDeregister(dconn, myDomainEventCallback1);
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}
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DEBUG0("Closing connection");
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if( dconn && virConnectClose(dconn)<0 ) {
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printf("error closing\n");
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}
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printf("done\n");
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return 0;
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}
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