/*
   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 "meta-hooks.h"

static int
subvolumes_dir_fill(xlator_t *this, inode_t *dir, struct meta_dirent **dp)
{
    struct meta_dirent *dirents = NULL;
    xlator_t *xl = NULL;
    xlator_list_t *subv = NULL;
    int i = 0;
    int count = 0;

    xl = meta_ctx_get(dir, this);

    for (subv = xl->children; subv; subv = subv->next)
        count++;

    dirents = GF_MALLOC(sizeof(*dirents) * count, gf_meta_mt_dirents_t);
    if (!dirents)
        return -1;

    for (subv = xl->children; subv; subv = subv->next) {
        char num[16] = {};
        snprintf(num, 16, "%d", i);

        dirents[i].name = gf_strdup(num);
        dirents[i].type = IA_IFLNK;
        dirents[i].hook = meta_subvolume_link_hook;
        i++;
    }

    *dp = dirents;

    return count;
}

static struct meta_ops subvolumes_dir_ops = {.dir_fill = subvolumes_dir_fill};

int
meta_subvolumes_dir_hook(call_frame_t *frame, xlator_t *this, loc_t *loc,
                         dict_t *xdata)
{
    meta_ctx_set(loc->inode, this, meta_ctx_get(loc->parent, this));

    meta_ops_set(loc->inode, this, &subvolumes_dir_ops);

    return 0;
}