meta: export process state dump

Various parts of process state dump are exposed
through most appropriate virual files/dirs

Change-Id: Iff30f8ea76552f2f6d9c98def688c5ec4bc6f2af
BUG: 1089216
Signed-off-by: Anand Avati <avati@redhat.com>
Reviewed-on: http://review.gluster.org/7542
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Harshavardhana <harsha@harshavardhana.net>

1 files changed, 91 insertions, 0 deletions

diff --git a/xlators/meta/src/volfile-file.c b/xlators/meta/src/volfile-file.c
new file mode 100644
index 00000000000..899285763e0
--- /dev/null
+++ b/xlators/meta/src/volfile-file.c
@@ -0,0 +1,91 @@
+/*
+   Copyright (c) 2014 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 _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "xlator.h"
+#include "defaults.h"
+
+#include "meta-mem-types.h"
+#include "meta.h"
+#include "strfd.h"
+
+
+
+static int
+xldump_options (dict_t *this, char *key, data_t *value,	void *strfd)
+{
+	strprintf (strfd, "    option %s %s\n", key, value->data);
+	return 0;
+}
+
+
+static void
+xldump_subvolumes (xlator_t *this, void *strfd)
+{
+	xlator_list_t *subv = NULL;
+
+	if (!this->children)
+		return;
+
+	strprintf (strfd, "    subvolumes");
+
+	for (subv = this->children; subv; subv= subv->next)
+		strprintf (strfd, " %s", subv->xlator->name);
+
+	strprintf (strfd, "\n");
+}
+
+
+static void
+xldump (xlator_t *each, void *strfd)
+{
+	strprintf (strfd, "volume %s\n", each->name);
+	strprintf (strfd, "    type %s\n", each->type);
+	dict_foreach (each->options, xldump_options, strfd);
+
+	xldump_subvolumes (each, strfd);
+
+	strprintf (strfd, "end-volume\n");
+	strprintf (strfd, "\n");
+}
+
+
+static int
+volfile_file_fill (xlator_t *this, inode_t *file, strfd_t *strfd)
+{
+	glusterfs_graph_t *graph = NULL;
+
+	graph = meta_ctx_get (file, this);
+
+	xlator_foreach_depth_first (graph->top, xldump, strfd);
+
+	return strfd->size;
+}
+
+
+static struct meta_ops volfile_file_ops = {
+	.file_fill = volfile_file_fill,
+};
+
+
+int
+meta_volfile_file_hook (call_frame_t *frame, xlator_t *this, loc_t *loc,
+			dict_t *xdata)
+{
+	meta_ops_set (loc->inode, this, &volfile_file_ops);
+
+	meta_ctx_set (loc->inode, this, meta_ctx_get (loc->parent, this));
+
+	return 0;
+}