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