Move the suspend event channel function to libxc, it will use the

/var/lib/xen/suspend_evtchn_lock.d to protect the access.

Signed-off-by: Jiang Yunhong <yunhong.jiang@intel.com>

2 files changed, 26 insertions, 0 deletions

diff --git a/tools/xenstore/xs.c b/tools/xenstore/xs.c
index 7fef574fbd..9707d19ca2 100644
--- a/tools/xenstore/xs.c
+++ b/tools/xenstore/xs.c
@@ -802,6 +802,31 @@ bool xs_is_domain_introduced(struct xs_handle *h, unsigned int domid)
 	return rc;
 }
 
+int xs_suspend_evtchn_port(int domid)
+{
+    char path[128];
+    char *portstr;
+    int port;
+    unsigned int plen;
+    struct xs_handle *xs;
+
+    xs = xs_daemon_open();
+    if (!xs)
+        return -1;
+
+    sprintf(path, "/local/domain/%d/device/suspend/event-channel", domid);
+    portstr = xs_read(xs, XBT_NULL, path, &plen);
+    xs_daemon_close(xs);
+
+    if (!portstr || !plen)
+        return -1;
+
+    port = atoi(portstr);
+    free(portstr);
+
+    return port;
+}
+
 /* Only useful for DEBUG versions */
 char *xs_debug_command(struct xs_handle *h, const char *cmd,
 		       void *data, unsigned int len)
diff --git a/tools/xenstore/xs.h b/tools/xenstore/xs.h
index dd8cbf8c95..629395291a 100644
--- a/tools/xenstore/xs.h
+++ b/tools/xenstore/xs.h
@@ -163,6 +163,7 @@ bool xs_is_domain_introduced(struct xs_handle *h, unsigned int domid);
 char *xs_debug_command(struct xs_handle *h, const char *cmd,
 		       void *data, unsigned int len);
 
+int xs_suspend_evtchn_port(int domid);
 #endif /* _XS_H */
 
 /*