gfapi: API/library for accessing gluster volumes

Change-Id: Ie4cbcf91b58218bebf23cf951c313aceeb29f311
BUG: 839950
Signed-off-by: Anand Avati <avati@redhat.com>
Reviewed-on: http://review.gluster.com/3664
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>
Reviewed-by: Bharata B Rao <bharata.rao@gmail.com>

1 files changed, 113 insertions, 0 deletions

diff --git a/api/src/glfs-master.c b/api/src/glfs-master.c
new file mode 100644
index 00000000000..0806c3077b7
--- /dev/null
+++ b/api/src/glfs-master.c
@@ -0,0 +1,113 @@
+/*
+  Copyright (c) 2012 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 <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <inttypes.h>
+#include <limits.h>
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "xlator.h"
+#include "glusterfs.h"
+#include "glfs-internal.h"
+
+
+int
+glfs_graph_setup (struct glfs *fs, glusterfs_graph_t *graph)
+{
+	if (fs->active_subvol == graph->top)
+		return 0;
+
+	pthread_mutex_lock (&fs->mutex);
+	{
+		fs->active_subvol = graph->top;
+		pthread_cond_broadcast (&fs->cond);
+	}
+	pthread_mutex_unlock (&fs->mutex);
+
+	gf_log ("glfs-master", GF_LOG_INFO, "switched to graph %s (%d)",
+		uuid_utoa ((unsigned char *)graph->graph_uuid), graph->id);
+
+	return 0;
+}
+
+
+int
+notify (xlator_t *this, int event, void *data, ...)
+{
+	glusterfs_graph_t   *graph = NULL;
+	struct glfs	    *fs = NULL;
+
+	graph = data;
+	fs = this->private;
+
+	switch (event) {
+	case GF_EVENT_GRAPH_NEW:
+		gf_log (this->name, GF_LOG_INFO, "New graph %s (%d) coming up",
+			uuid_utoa ((unsigned char *)graph->graph_uuid),
+			graph->id);
+		break;
+	case GF_EVENT_CHILD_UP:
+		glfs_graph_setup (fs, graph);
+		glfs_init_done (fs, 0);
+		break;
+	case GF_EVENT_CHILD_DOWN:
+		glfs_graph_setup (fs, graph);
+		glfs_init_done (fs, 1);
+		break;
+	case GF_EVENT_CHILD_CONNECTING:
+		break;
+	default:
+		gf_log (this->name, GF_LOG_DEBUG,
+			"got notify event %d", event);
+		break;
+	}
+
+	return 0;
+}
+
+
+int
+mem_acct_init (xlator_t *this)
+{
+	return 0;
+}
+
+
+int
+init (xlator_t *this)
+{
+	return 0;
+}
+
+
+void
+fini (xlator_t *this)
+{
+
+}
+
+
+struct xlator_dumpops dumpops = {
+};
+
+
+struct xlator_fops fops = {
+};
+
+
+struct xlator_cbks cbks = {
+};