5 files changed, 138 insertions, 0 deletions
diff --git a/libglusterfs/src/Makefile.am b/libglusterfs/src/Makefile.am
index 2ec0f34a670..1dbea92b2bb 100644
--- a/libglusterfs/src/Makefile.am
+++ b/libglusterfs/src/Makefile.am
@@ -71,6 +71,12 @@ libglusterfs_la_SOURCES += $(CONTRIBDIR)/uuid/clear.c \
 	$(CONTRIBDIR)/uuid/unpack.c
 endif
 
+if BUILD_EVENTS
+libglusterfs_la_SOURCES += events.c
+
+libglusterfs_la_HEADERS += events.h eventtypes.h
+endif
+
 libgfchangelog_HEADERS = changelog.h
 
 EXTRA_DIST = graph.l graph.y defaults-tmpl.c
diff --git a/libglusterfs/src/events.c b/libglusterfs/src/events.c
new file mode 100644
index 00000000000..9d781874a8a
--- /dev/null
+++ b/libglusterfs/src/events.c
@@ -0,0 +1,83 @@
+/*
+  Copyright (c) 2016 Red Hat, Inc. <http://www.redhat.com>
+  This file is part of GlusterFS.
+
+  This file is licensed to you under your choice of the GNU Lesser
+  General Public License, version 3 or any later version (LGPLv3 or
+  later), or the GNU General Public License, version 2 (GPLv2), in all
+  cases as published by the Free Software Foundation.
+*/
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <time.h>
+#include <stdarg.h>
+#include <string.h>
+#include "syscall.h"
+#include "mem-pool.h"
+#include "events.h"
+
+int
+gf_event (int event, char *fmt, ...)
+{
+        int      sock                     = -1;
+        char     eventstr[EVENTS_MSG_MAX] = "";
+        struct   sockaddr_un server;
+        va_list  arguments;
+        char     *msg                     = NULL;
+        int      ret                      = 0;
+        size_t   eventstr_size            = 0;
+
+        if (event < 0 || event >= EVENT_LAST) {
+                ret = EVENT_ERROR_INVALID_INPUTS;
+                goto out;
+        }
+
+        sock = socket(AF_UNIX, SOCK_STREAM, 0);
+        if (sock < 0) {
+                ret = EVENT_ERROR_SOCKET;
+                goto out;
+        }
+        server.sun_family = AF_UNIX;
+        strcpy(server.sun_path, EVENT_PATH);
+
+        if (connect(sock,
+                    (struct sockaddr *) &server,
+                    sizeof(struct sockaddr_un)) < 0) {
+                ret = EVENT_ERROR_CONNECT;
+                goto out;
+        }
+
+        va_start (arguments, fmt);
+        ret = gf_vasprintf (&msg, fmt, arguments);
+        va_end (arguments);
+        if (ret < 0) {
+                ret = EVENT_ERROR_INVALID_INPUTS;
+                goto out;
+        }
+
+        eventstr_size = snprintf(NULL, 0, "%u %d %s", (unsigned)time(NULL),
+                                 event, msg);
+
+        if (eventstr_size + 1 > EVENTS_MSG_MAX) {
+                eventstr_size = EVENTS_MSG_MAX - 1;
+        }
+
+        snprintf(eventstr, eventstr_size+1, "%u %d %s",
+                 (unsigned)time(NULL), event, msg);
+
+        if (sys_write(sock, eventstr, strlen(eventstr)) <= 0) {
+                ret = EVENT_ERROR_SEND;
+                goto out;
+        }
+
+        ret = EVENT_SEND_OK;
+
+ out:
+        sys_close(sock);
+        GF_FREE(msg);
+        return ret;
+}
diff --git a/libglusterfs/src/events.h.in b/libglusterfs/src/events.h.in
new file mode 100644
index 00000000000..37692bef732
--- /dev/null
+++ b/libglusterfs/src/events.h.in
@@ -0,0 +1,23 @@
+/*
+  Copyright (c) 2016 Red Hat, Inc. <http://www.redhat.com>
+  This file is part of GlusterFS.
+
+  This file is licensed to you under your choice of the GNU Lesser
+  General Public License, version 3 or any later version (LGPLv3 or
+  later), or the GNU General Public License, version 2 (GPLv2), in all
+  cases as published by the Free Software Foundation.
+*/
+
+#ifndef __EVENTS_H__
+#define __EVENTS_H__
+
+#include <stdio.h>
+
+#include "eventtypes.h"
+
+#define EVENT_PATH "@localstatedir@/run/gluster/events.sock"
+#define EVENTS_MSG_MAX 2048
+
+extern int gf_event(int key, char *fmt, ...);
+
+#endif /* __EVENTS_H__ */
diff --git a/libglusterfs/src/eventtypes.h b/libglusterfs/src/eventtypes.h
new file mode 100644
index 00000000000..874f8ccf114
--- /dev/null
+++ b/libglusterfs/src/eventtypes.h
@@ -0,0 +1,22 @@
+#ifndef __EVENTTYPES_H__
+#define __EVENTTYPES_H__
+
+typedef enum {
+    EVENT_SEND_OK,
+    EVENT_ERROR_INVALID_INPUTS,
+    EVENT_ERROR_SOCKET,
+    EVENT_ERROR_CONNECT,
+    EVENT_ERROR_SEND,
+} event_errors_t;
+
+typedef enum {
+    EVENT_PEER_ATTACH,
+    EVENT_PEER_DETACH,
+    EVENT_VOLUME_CREATE,
+    EVENT_VOLUME_START,
+    EVENT_VOLUME_STOP,
+    EVENT_VOLUME_DELETE,
+    EVENT_LAST
+} eventtypes_t;
+
+#endif /* __EVENTTYPES_H__ */
diff --git a/libglusterfs/src/glusterfs.h b/libglusterfs/src/glusterfs.h
index 8d387bafb3b..d11cbdcb8ee 100644
--- a/libglusterfs/src/glusterfs.h
+++ b/libglusterfs/src/glusterfs.h
@@ -37,6 +37,10 @@
 #include "lkowner.h"
 #include "compat-uuid.h"
 
+#if (USE_EVENTS)
+#include "events.h"
+#endif
+
 #define GF_YES 1
 #define GF_NO  0