Quelle  tpmrm-dev.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2017 James.Bottomley@HansenPartnership.com
 */
#include <linux/slab.h>
#include "tpm-dev.h"

struct tpmrm_priv {
 struct file_priv priv;
 struct tpm_space space;
};

static int tpmrm_open(struct inode *inode, struct file *file)
{
 struct tpm_chip *chip;
 struct tpmrm_priv *priv;
 int rc;

 chip = container_of(inode->i_cdev, struct tpm_chip, cdevs);
 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 if (priv == NULL)
  return -ENOMEM;

 rc = tpm2_init_space(&priv->space, TPM2_SPACE_BUFFER_SIZE);
 if (rc) {
  kfree(priv);
  return -ENOMEM;
 }

 tpm_common_open(file, chip, &priv->priv, &priv->space);

 return 0;
}

static int tpmrm_release(struct inode *inode, struct file *file)
{
 struct file_priv *fpriv = file->private_data;
 struct tpmrm_priv *priv = container_of(fpriv, struct tpmrm_priv, priv);

 tpm_common_release(file, fpriv);
 tpm2_del_space(fpriv->chip, &priv->space);
 kfree(priv);

 return 0;
}

const struct file_operations tpmrm_fops = {
 .owner = THIS_MODULE,
 .open = tpmrm_open,
 .read = tpm_common_read,
 .write = tpm_common_write,
 .poll = tpm_common_poll,
 .release = tpmrm_release,
};