66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
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/*
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* Copyright (C) 2017 James.Bottomley@HansenPartnership.com
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*
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* GPLv2
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*/
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#include <linux/slab.h>
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#include "tpm-dev.h"
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struct tpmrm_priv {
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struct file_priv priv;
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struct tpm_space space;
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};
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static int tpmrm_open(struct inode *inode, struct file *file)
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{
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struct tpm_chip *chip;
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struct tpmrm_priv *priv;
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int rc;
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chip = container_of(inode->i_cdev, struct tpm_chip, cdevs);
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (priv == NULL)
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return -ENOMEM;
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rc = tpm2_init_space(&priv->space, TPM2_SPACE_BUFFER_SIZE);
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if (rc) {
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kfree(priv);
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return -ENOMEM;
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}
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tpm_common_open(file, chip, &priv->priv);
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return 0;
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}
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static int tpmrm_release(struct inode *inode, struct file *file)
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{
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struct file_priv *fpriv = file->private_data;
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struct tpmrm_priv *priv = container_of(fpriv, struct tpmrm_priv, priv);
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tpm_common_release(file, fpriv);
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tpm2_del_space(fpriv->chip, &priv->space);
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kfree(priv);
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return 0;
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}
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static ssize_t tpmrm_write(struct file *file, const char __user *buf,
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size_t size, loff_t *off)
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{
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struct file_priv *fpriv = file->private_data;
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struct tpmrm_priv *priv = container_of(fpriv, struct tpmrm_priv, priv);
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return tpm_common_write(file, buf, size, off, &priv->space);
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}
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const struct file_operations tpmrm_fops = {
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.owner = THIS_MODULE,
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.llseek = no_llseek,
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.open = tpmrm_open,
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.read = tpm_common_read,
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.write = tpmrm_write,
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.release = tpmrm_release,
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};
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