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-rw-r--r--agents/virt/server/virt-serial.c444
1 files changed, 444 insertions, 0 deletions
diff --git a/agents/virt/server/virt-serial.c b/agents/virt/server/virt-serial.c
new file mode 100644
index 0000000..6b369bc
--- /dev/null
+++ b/agents/virt/server/virt-serial.c
@@ -0,0 +1,444 @@
+// #include <config.h>
+
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <errno.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include <sys/types.h>
+#include <sys/poll.h>
+#include <libvirt/libvirt.h>
+
+#include <libxml/xmlreader.h>
+
+#include "simpleconfig.h"
+#include "debug.h"
+
+#define DEBUG0(fmt) dbg_printf(5,"%s:%d :: " fmt "\n", \
+ __func__, __LINE__)
+#define DEBUG1(fmt, ...) dbg_printf(5, "%s:%d: " fmt "\n", \
+ __func__, __LINE__, __VA_ARGS__)
+
+#include "serial.h"
+
+#define STREQ(a,b) (strcmp((a),(b)) == 0)
+
+static pthread_t event_tid = 0;
+static int run = 0;
+
+/* Prototypes */
+const char *eventToString(int event);
+int myDomainEventCallback1(virConnectPtr conn, virDomainPtr dom,
+ int event, int detail, void *opaque);
+
+void usage(const char *pname);
+
+struct domain_info {
+ virDomainPtr dom;
+ virDomainEventType event;
+};
+
+static int
+is_in_directory(const char *dir, const char *pathspec)
+{
+ char *last_slash = NULL;
+ size_t dirlen, pathlen;
+
+ if (!dir || !pathspec)
+ return 0;
+
+ dirlen = strlen(dir);
+ pathlen = strlen(pathspec);
+
+ /*
+ printf("dirlen = %d pathlen = %d\n",
+ dirlen, pathlen);
+ */
+
+ /* chop off trailing slashes */
+ while (dirlen && dir[dirlen-1]=='/')
+ --dirlen;
+
+ /* chop off leading slashes */
+ while (dirlen && dir[0] == '/') {
+ ++dir;
+ --dirlen;
+ }
+
+ /* chop off leading slashes */
+ while (pathlen && pathspec[0] == '/') {
+ ++pathspec;
+ --pathlen;
+ }
+
+ if (!dirlen || !pathlen)
+ return 0;
+
+ if (pathlen <= dirlen)
+ return 0;
+
+ last_slash = strrchr(pathspec, '/');
+
+ if (!last_slash)
+ return 0;
+
+ while (*last_slash == '/' && last_slash > pathspec)
+ --last_slash;
+
+ if (last_slash == pathspec)
+ return 0;
+
+ pathlen = last_slash - pathspec + 1;
+ /*printf("real dirlen = %d real pathlen = %d\n",
+ dirlen, pathlen);*/
+ if (pathlen != dirlen)
+ return 0;
+
+ /* todo - intelligently skip multiple slashes mid-path */
+ return !strncmp(dir, pathspec, dirlen);
+}
+
+
+static int
+domainStarted(virDomainPtr mojaDomain, const char *path, int mode)
+{
+ char dom_uuid[42];
+ char *xml;
+ xmlDocPtr doc;
+ xmlNodePtr cur, devices, child, serial;
+ xmlAttrPtr attr, attr_mode, attr_path;
+
+ if (!mojaDomain)
+ return -1;
+
+ virDomainGetUUIDString(mojaDomain, dom_uuid);
+
+ xml = virDomainGetXMLDesc(mojaDomain, 0);
+ // printf("%s\n", xml);
+ // @todo: free mojaDomain
+
+ // parseXML output
+ doc = xmlParseMemory(xml, strlen(xml));
+ xmlFree(xml);
+ cur = xmlDocGetRootElement(doc);
+
+ if (cur == NULL) {
+ fprintf(stderr, "Empty doc\n");
+ xmlFreeDoc(doc);
+ return -1;
+ }
+
+ if (xmlStrcmp(cur->name, (const xmlChar *) "domain")) {
+ fprintf(stderr, "no domain?\n");
+ xmlFreeDoc(doc);
+ return -1;
+ }
+
+ devices = cur->xmlChildrenNode;
+ for (devices = cur->xmlChildrenNode; devices != NULL;
+ devices = devices->next) {
+ if (xmlStrcmp(devices->name, (const xmlChar *) "devices")) {
+ continue;
+ }
+
+ for (child = devices->xmlChildrenNode; child != NULL;
+ child = child->next) {
+
+ if ((!mode && xmlStrcmp(child->name, (const xmlChar *) "serial")) ||
+ (mode && xmlStrcmp(child->name, (const xmlChar *) "channel"))) {
+ continue;
+ }
+
+ attr = xmlHasProp(child, (const xmlChar *)"type");
+ if (attr == NULL)
+ continue;
+
+ if (xmlStrcmp(attr->children->content,
+ (const xmlChar *) "unix")) {
+ continue;
+ }
+
+ for (serial = child->xmlChildrenNode; serial != NULL;
+ serial = serial->next) {
+ if (xmlStrcmp(serial->name,
+ (const xmlChar *) "source")) {
+ continue;
+ }
+
+ attr_mode = xmlHasProp(serial, (const xmlChar *)"mode");
+ attr_path = xmlHasProp(serial, (const xmlChar *)"path");
+
+ if (!attr_path || !attr_mode)
+ continue;
+
+ if (xmlStrcmp(attr_mode->children->content,
+ (const xmlChar *) "bind"))
+ continue;
+
+ if (path && !is_in_directory(path, (const char *)
+ attr_path->children->content))
+ continue;
+
+ domain_sock_setup(dom_uuid, (const char *)
+ attr_path->children->content);
+ }
+ }
+ }
+
+ xmlFreeDoc(doc);
+ return 0;
+}
+
+static int
+registerExisting(virConnectPtr vp, const char *path, int mode)
+{
+ int *d_ids = NULL;
+ int d_count, x;
+ virDomainPtr dom;
+ virDomainInfo d_info;
+
+ errno = EINVAL;
+ if (!vp)
+ return -1;
+
+ d_count = virConnectNumOfDomains(vp);
+ if (d_count <= 0) {
+ if (d_count == 0) {
+ /* Successful, but no domains running */
+ errno = 0;
+ return 0;
+ }
+ goto out_fail;
+ }
+
+ d_ids = malloc(sizeof (int) * d_count);
+ if (!d_ids)
+ goto out_fail;
+
+ if (virConnectListDomains(vp, d_ids, d_count) < 0)
+ goto out_fail;
+
+ /* Ok, we have the domain IDs - let's get their names and states */
+ for (x = 0; x < d_count; x++) {
+ dom = virDomainLookupByID(vp, d_ids[x]);
+ if (!dom) {
+ /* XXX doom */
+ goto out_fail;
+ }
+
+ if (virDomainGetInfo(dom, &d_info) < 0) {
+ /* XXX no info for the domain?!! */
+ virDomainFree(dom);
+ goto out_fail;
+ }
+
+ if (d_info.state != VIR_DOMAIN_SHUTOFF &&
+ d_info.state != VIR_DOMAIN_CRASHED)
+ domainStarted(dom, path, mode);
+
+ virDomainFree(dom);
+ }
+
+ out_fail:
+ free(d_ids);
+ return 0;
+}
+
+static int
+domainStopped(virDomainPtr mojaDomain)
+{
+ char dom_uuid[42];
+
+ if (!mojaDomain)
+ return -1;
+
+ virDomainGetUUIDString(mojaDomain, dom_uuid);
+ domain_sock_close(dom_uuid);
+
+ return 0;
+}
+
+
+struct event_args {
+ char *uri;
+ char *path;
+ int mode;
+ int wake_fd;
+};
+
+static void
+connectClose(virConnectPtr conn ATTRIBUTE_UNUSED,
+ int reason,
+ void *opaque ATTRIBUTE_UNUSED)
+{
+ switch (reason) {
+ case VIR_CONNECT_CLOSE_REASON_ERROR:
+ dbg_printf(2, "Connection closed due to I/O error\n");
+ break;
+ case VIR_CONNECT_CLOSE_REASON_EOF:
+ dbg_printf(2, "Connection closed due to end of file\n");
+ break;
+ case VIR_CONNECT_CLOSE_REASON_KEEPALIVE:
+ dbg_printf(2, "Connection closed due to keepalive timeout\n");
+ break;
+ case VIR_CONNECT_CLOSE_REASON_CLIENT:
+ dbg_printf(2, "Connection closed due to client request\n");
+ break;
+ default:
+ dbg_printf(2, "Connection closed due to unknown reason\n");
+ break;
+ };
+ run = 0;
+}
+
+int
+myDomainEventCallback1(virConnectPtr conn,
+ virDomainPtr dom, int event, int detail, void *opaque)
+{
+ struct event_args *args = (struct event_args *)opaque;
+
+ if (event == VIR_DOMAIN_EVENT_STARTED ||
+ event == VIR_DOMAIN_EVENT_STOPPED) {
+ virDomainRef(dom);
+ if (event == VIR_DOMAIN_EVENT_STARTED) {
+ domainStarted(dom, args->path, args->mode);
+ virDomainFree(dom);
+ if (write(args->wake_fd, "x", 1) != 1) {
+ dbg_printf(3, "Unable to wake up thread\n");
+ }
+ } else if (event == VIR_DOMAIN_EVENT_STOPPED) {
+ domainStopped(dom);
+ virDomainFree(dom);
+ }
+ }
+
+ return 0;
+}
+
+
+static void *
+event_thread(void *arg)
+{
+ struct event_args *args = (struct event_args *)arg;
+ virConnectPtr dconn = NULL;
+ int callback1ret = -1;
+
+ dbg_printf(3, "Libvirt event listener starting\n");
+ if (args->uri)
+ dbg_printf(3," * URI: %s\n", args->uri);
+ if (args->path)
+ dbg_printf(3," * Socket path: %s\n", args->path);
+ dbg_printf(3," * Mode: %s\n", args->mode ? "VMChannel" : "Serial");
+
+ if (virEventRegisterDefaultImpl() < 0) {
+ dbg_printf(1, "Failed to register default event impl\n");
+ goto out;
+ }
+
+ dconn = virConnectOpen(args->uri);
+ if (!dconn) {
+ dbg_printf(1, "Error connecting to libvirt\n");
+ goto out;
+ }
+
+ virConnectRegisterCloseCallback(dconn, connectClose, NULL, NULL);
+
+ DEBUG0("Registering domain event cbs");
+
+ registerExisting(dconn, args->path, args->mode);
+
+ callback1ret =
+ virConnectDomainEventRegister(dconn, myDomainEventCallback1, arg, NULL);
+
+ if (callback1ret != -1) {
+ if (virConnectSetKeepAlive(dconn, 5, 5) < 0) {
+ dbg_printf(1, "Failed to start keepalive protocol\n");
+ run = 0;
+ }
+ while (run) {
+ if (virEventRunDefaultImpl() < 0) {
+ dbg_printf(1, "RunDefaultImpl Failed\n");
+ }
+ }
+
+ DEBUG0("Deregistering event handlers");
+ virConnectDomainEventDeregister(dconn, myDomainEventCallback1);
+ }
+
+ DEBUG0("Closing connection");
+ if (dconn && virConnectClose(dconn) < 0) {
+ dbg_printf(1, "error closing libvirt connection\n");
+ }
+
+out:
+ free(args->uri);
+ free(args->path);
+ free(args);
+ return NULL;
+}
+
+
+int
+start_event_listener(const char *uri, const char *path, int mode, int *wake_fd)
+{
+ struct event_args *args = NULL;
+ int wake_pipe[2];
+
+ virInitialize();
+
+ args = malloc(sizeof(*args));
+ if (!args)
+ return -1;
+ memset(args, 0, sizeof(*args));
+
+ if (pipe2(wake_pipe, O_CLOEXEC) < 0) {
+ goto out_fail;
+ }
+
+ if (uri) {
+ args->uri = strdup(uri);
+ if (args->uri == NULL)
+ goto out_fail;
+ }
+
+ if (path) {
+ args->path = strdup(path);
+ if (args->path == NULL)
+ goto out_fail;
+ }
+
+ args->mode = mode;
+ //args->p_tid = pthread_self();
+ *wake_fd = wake_pipe[0];
+ args->wake_fd = wake_pipe[1];
+
+ run = 1;
+
+ return pthread_create(&event_tid, NULL, event_thread, args);
+
+out_fail:
+ free(args->uri);
+ free(args->path);
+ free(args);
+ return -1;
+}
+
+
+int
+stop_event_listener(void)
+{
+ run = 0;
+ //pthread_cancel(event_tid);
+ pthread_join(event_tid, NULL);
+ event_tid = 0;
+
+ return 0;
+}
+
+
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