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Message-Id: <1282293963-27807-21-git-send-email-mitr@redhat.com>
Date: Fri, 20 Aug 2010 10:46:03 +0200
From: Miloslav Trmač <mitr@...hat.com>
To: Herbert Xu <herbert@...dor.hengli.com.au>
Cc: linux-crypto@...r.kernel.org,
Nikos Mavrogiannopoulos <n.mavrogiannopoulos@...il.com>,
Neil Horman <nhorman@...hat.com>, linux-kernel@...r.kernel.org,
Miloslav Trmač <mitr@...hat.com>
Subject: [PATCH 19/19] Finally, add the /dev/crypto device.
---
crypto/userspace/cryptodev_main.c | 130 +++++++++++++++++++++++++++++++++++++
1 files changed, 130 insertions(+), 0 deletions(-)
diff --git a/crypto/userspace/cryptodev_main.c b/crypto/userspace/cryptodev_main.c
index a6712db..6ba9bd6 100644
--- a/crypto/userspace/cryptodev_main.c
+++ b/crypto/userspace/cryptodev_main.c
@@ -98,3 +98,133 @@ int __get_userbuf(uint8_t __user *addr, uint32_t len, int write,
return 0;
}
+/* ====== /dev/crypto ====== */
+
+static int
+cryptodev_open(struct inode *inode, struct file *filp)
+{
+ struct ncr_lists *ncr;
+ int ret;
+
+ ncr = ncr_init_lists();
+ if (ncr == NULL) {
+ return -ENOMEM;
+ }
+
+ ret = audit_log_crypto_op(AUDIT_CRYPTO_OP_CONTEXT_NEW, ncr->id, -1,
+ NULL, NULL, -1, NULL, 0, -1, NULL, 0);
+ if (ret < 0) {
+ ncr_deinit_lists(ncr);
+ return ret;
+ }
+
+ filp->private_data = ncr;
+ return 0;
+}
+
+static int
+cryptodev_release(struct inode *inode, struct file *filp)
+{
+ struct ncr_lists *ncr = filp->private_data;
+
+ if (ncr) {
+ audit_log_crypto_op(AUDIT_CRYPTO_OP_CONTEXT_DEL, ncr->id, -1,
+ NULL, NULL, -1, NULL, 0, -1, NULL, 0);
+ ncr_deinit_lists(ncr);
+ filp->private_data = NULL;
+ }
+
+ return 0;
+}
+
+static int
+cryptodev_ioctl(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
+{
+ void *ncr = filp->private_data;
+
+ if (unlikely(!ncr))
+ BUG();
+
+ return ncr_ioctl(ncr, cmd, arg);
+}
+
+/* compatibility code for 32bit userlands */
+#ifdef CONFIG_COMPAT
+
+static long
+cryptodev_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ void *ncr = file->private_data;
+
+ if (unlikely(!ncr))
+ BUG();
+
+ return ncr_compat_ioctl(ncr, cmd, arg);
+}
+
+#endif /* CONFIG_COMPAT */
+
+static const struct file_operations cryptodev_fops = {
+ .owner = THIS_MODULE,
+ .open = cryptodev_open,
+ .release = cryptodev_release,
+ .ioctl = cryptodev_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = cryptodev_compat_ioctl,
+#endif /* CONFIG_COMPAT */
+};
+
+static struct miscdevice cryptodev = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "crypto",
+ .fops = &cryptodev_fops,
+};
+
+static int __init
+cryptodev_register(void)
+{
+ int rc;
+
+ ncr_limits_init();
+ ncr_master_key_reset();
+
+ rc = misc_register (&cryptodev);
+ if (unlikely(rc)) {
+ ncr_limits_deinit();
+ printk(KERN_ERR PFX "registration of /dev/crypto failed\n");
+ return rc;
+ }
+
+ return 0;
+}
+
+static void __exit
+cryptodev_deregister(void)
+{
+ misc_deregister(&cryptodev);
+ ncr_limits_deinit();
+}
+
+/* ====== Module init/exit ====== */
+static int __init init_cryptodev(void)
+{
+ int rc;
+
+ rc = cryptodev_register();
+ if (unlikely(rc))
+ return rc;
+
+ printk(KERN_INFO PFX "driver loaded.\n");
+
+ return 0;
+}
+
+static void __exit exit_cryptodev(void)
+{
+ cryptodev_deregister();
+ printk(KERN_INFO PFX "driver unloaded.\n");
+}
+
+module_init(init_cryptodev);
+module_exit(exit_cryptodev);
--
1.7.2.1
--
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