/*
   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.
*/

#include <glusterfs/xlator.h>
#include <glusterfs/defaults.h>

#include "meta-mem-types.h"
#include "meta.h"
#include <glusterfs/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;
}