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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2019 Mellanox Technologies. All rights reserved */
#include <linux/debugfs.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include "netdevsim.h"
static struct dentry *nsim_sdev_ddir;
static u32 nsim_sdev_id;
struct netdevsim_shared_dev *nsim_sdev_get(struct netdevsim *joinns)
{
struct netdevsim_shared_dev *sdev;
char sdev_ddir_name[10];
int err;
if (joinns) {
if (WARN_ON(!joinns->sdev))
return ERR_PTR(-EINVAL);
sdev = joinns->sdev;
sdev->refcnt++;
return sdev;
}
sdev = kzalloc(sizeof(*sdev), GFP_KERNEL);
if (!sdev)
return ERR_PTR(-ENOMEM);
sdev->refcnt = 1;
sdev->switch_id = nsim_sdev_id++;
sprintf(sdev_ddir_name, "%u", sdev->switch_id);
sdev->ddir = debugfs_create_dir(sdev_ddir_name, nsim_sdev_ddir);
if (IS_ERR_OR_NULL(sdev->ddir)) {
err = PTR_ERR_OR_ZERO(sdev->ddir) ?: -EINVAL;
goto err_sdev_free;
}
return sdev;
err_sdev_free:
nsim_sdev_id--;
kfree(sdev);
return ERR_PTR(err);
}
void nsim_sdev_put(struct netdevsim_shared_dev *sdev)
{
if (--sdev->refcnt)
return;
debugfs_remove_recursive(sdev->ddir);
kfree(sdev);
}
int nsim_sdev_init(void)
{
nsim_sdev_ddir = debugfs_create_dir(DRV_NAME "_sdev", NULL);
if (IS_ERR_OR_NULL(nsim_sdev_ddir))
return -ENOMEM;
return 0;
}
void nsim_sdev_exit(void)
{
debugfs_remove_recursive(nsim_sdev_ddir);
}
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