Commit | Line | Data |
---|---|---|
fdc915f7 JB |
1 | /* |
2 | * Copyright (C) 2017 James.Bottomley@HansenPartnership.com | |
3 | * | |
4 | * GPLv2 | |
5 | */ | |
6 | #include <linux/slab.h> | |
7 | #include "tpm-dev.h" | |
8 | ||
9 | struct tpmrm_priv { | |
10 | struct file_priv priv; | |
11 | struct tpm_space space; | |
12 | }; | |
13 | ||
14 | static int tpmrm_open(struct inode *inode, struct file *file) | |
15 | { | |
16 | struct tpm_chip *chip; | |
17 | struct tpmrm_priv *priv; | |
18 | int rc; | |
19 | ||
20 | chip = container_of(inode->i_cdev, struct tpm_chip, cdevs); | |
21 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
22 | if (priv == NULL) | |
23 | return -ENOMEM; | |
24 | ||
25 | rc = tpm2_init_space(&priv->space); | |
26 | if (rc) { | |
27 | kfree(priv); | |
28 | return -ENOMEM; | |
29 | } | |
30 | ||
31 | tpm_common_open(file, chip, &priv->priv); | |
32 | ||
33 | return 0; | |
34 | } | |
35 | ||
36 | static int tpmrm_release(struct inode *inode, struct file *file) | |
37 | { | |
38 | struct file_priv *fpriv = file->private_data; | |
39 | struct tpmrm_priv *priv = container_of(fpriv, struct tpmrm_priv, priv); | |
40 | ||
41 | tpm_common_release(file, fpriv); | |
4d57856a | 42 | tpm2_del_space(fpriv->chip, &priv->space); |
fdc915f7 JB |
43 | kfree(priv); |
44 | ||
45 | return 0; | |
46 | } | |
47 | ||
5e9fefd2 | 48 | static ssize_t tpmrm_write(struct file *file, const char __user *buf, |
fdc915f7 JB |
49 | size_t size, loff_t *off) |
50 | { | |
51 | struct file_priv *fpriv = file->private_data; | |
52 | struct tpmrm_priv *priv = container_of(fpriv, struct tpmrm_priv, priv); | |
53 | ||
54 | return tpm_common_write(file, buf, size, off, &priv->space); | |
55 | } | |
56 | ||
57 | const struct file_operations tpmrm_fops = { | |
58 | .owner = THIS_MODULE, | |
59 | .llseek = no_llseek, | |
60 | .open = tpmrm_open, | |
61 | .read = tpm_common_read, | |
62 | .write = tpmrm_write, | |
63 | .release = tpmrm_release, | |
64 | }; | |
65 |