/*
   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"

static int
subvolume_link_fill(xlator_t *this, inode_t *inode, strfd_t *strfd)
{
    xlator_t *xl = NULL;

    xl = meta_ctx_get(inode, this);

    strprintf(strfd, "../../%s", xl->name);

    return 0;
}

struct meta_ops subvolume_link_ops = {.link_fill = subvolume_link_fill};

int
meta_subvolume_link_hook(call_frame_t *frame, xlator_t *this, loc_t *loc,
                         dict_t *xdata)
{
    int count = 0;
    int i = 0;
    xlator_t *xl = NULL;
    xlator_list_t *subv = NULL;
    xlator_t *subvol = NULL;

    count = strtol(loc->name, 0, 0);
    xl = meta_ctx_get(loc->parent, this);

    for (subv = xl->children; subv; subv = subv->next) {
        if (i == count) {
            subvol = subv->xlator;
            break;
        }
        i++;
    }

    meta_ctx_set(loc->inode, this, subvol);

    meta_ops_set(loc->inode, this, &subvolume_link_ops);
    return 0;
}