forked from Minki/linux
[Bluetooth]: Update and cleanup of the virtual HCI driver
This patch cleans up the virtual HCI driver. It also adds support for the dynamic minor device number allocation. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Marcel Holtmann
David S. Miller
parent
f6ccf55419
commit
4aa769b997
@ -1,229 +1,220 @@
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/*
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BlueZ - Bluetooth protocol stack for Linux
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Copyright (C) 2000-2001 Qualcomm Incorporated
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Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2 as
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published by the Free Software Foundation;
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
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CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
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COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
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SOFTWARE IS DISCLAIMED.
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*/
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/*
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* Bluetooth HCI virtual device driver.
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*
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* $Id: hci_vhci.c,v 1.3 2002/04/17 17:37:20 maxk Exp $
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* Bluetooth virtual HCI driver
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*
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* Copyright (C) 2000-2001 Qualcomm Incorporated
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* Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com>
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* Copyright (C) 2004-2005 Marcel Holtmann <marcel@holtmann.org>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#define VERSION "1.1"
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/major.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/poll.h>
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#include <linux/fcntl.h>
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#include <linux/init.h>
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#include <linux/random.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/poll.h>
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#include <linux/skbuff.h>
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#include <linux/miscdevice.h>
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#include <asm/system.h>
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#include <asm/uaccess.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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#include "hci_vhci.h"
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/* HCI device part */
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#ifndef CONFIG_BT_HCIVHCI_DEBUG
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#undef BT_DBG
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#define BT_DBG(D...)
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#endif
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static int hci_vhci_open(struct hci_dev *hdev)
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#define VERSION "1.2"
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static int minor = MISC_DYNAMIC_MINOR;
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struct vhci_data {
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struct hci_dev *hdev;
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unsigned long flags;
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wait_queue_head_t read_wait;
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struct sk_buff_head readq;
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struct fasync_struct *fasync;
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};
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#define VHCI_FASYNC 0x0010
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static struct miscdevice vhci_miscdev;
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static int vhci_open_dev(struct hci_dev *hdev)
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{
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set_bit(HCI_RUNNING, &hdev->flags);
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return 0;
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}
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static int hci_vhci_flush(struct hci_dev *hdev)
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static int vhci_close_dev(struct hci_dev *hdev)
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{
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struct hci_vhci_struct *hci_vhci = (struct hci_vhci_struct *) hdev->driver_data;
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skb_queue_purge(&hci_vhci->readq);
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return 0;
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}
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struct vhci_data *vhci = hdev->driver_data;
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static int hci_vhci_close(struct hci_dev *hdev)
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{
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if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
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return 0;
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hci_vhci_flush(hdev);
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skb_queue_purge(&vhci->readq);
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return 0;
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}
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static void hci_vhci_destruct(struct hci_dev *hdev)
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static int vhci_flush(struct hci_dev *hdev)
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{
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struct hci_vhci_struct *vhci;
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struct vhci_data *vhci = hdev->driver_data;
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if (!hdev) return;
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skb_queue_purge(&vhci->readq);
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vhci = (struct hci_vhci_struct *) hdev->driver_data;
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kfree(vhci);
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return 0;
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}
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static int hci_vhci_send_frame(struct sk_buff *skb)
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static int vhci_send_frame(struct sk_buff *skb)
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{
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struct hci_dev* hdev = (struct hci_dev *) skb->dev;
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struct hci_vhci_struct *hci_vhci;
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struct vhci_data *vhci;
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if (!hdev) {
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BT_ERR("Frame for uknown device (hdev=NULL)");
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BT_ERR("Frame for unknown HCI device (hdev=NULL)");
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return -ENODEV;
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}
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if (!test_bit(HCI_RUNNING, &hdev->flags))
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return -EBUSY;
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hci_vhci = (struct hci_vhci_struct *) hdev->driver_data;
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vhci = hdev->driver_data;
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memcpy(skb_push(skb, 1), &skb->pkt_type, 1);
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skb_queue_tail(&hci_vhci->readq, skb);
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skb_queue_tail(&vhci->readq, skb);
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if (hci_vhci->flags & VHCI_FASYNC)
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kill_fasync(&hci_vhci->fasync, SIGIO, POLL_IN);
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wake_up_interruptible(&hci_vhci->read_wait);
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if (vhci->flags & VHCI_FASYNC)
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kill_fasync(&vhci->fasync, SIGIO, POLL_IN);
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wake_up_interruptible(&vhci->read_wait);
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return 0;
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}
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/* Character device part */
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/* Poll */
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static unsigned int hci_vhci_chr_poll(struct file *file, poll_table * wait)
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{
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struct hci_vhci_struct *hci_vhci = (struct hci_vhci_struct *) file->private_data;
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poll_wait(file, &hci_vhci->read_wait, wait);
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if (!skb_queue_empty(&hci_vhci->readq))
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return POLLIN | POLLRDNORM;
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return POLLOUT | POLLWRNORM;
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static void vhci_destruct(struct hci_dev *hdev)
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{
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kfree(hdev->driver_data);
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}
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/* Get packet from user space buffer(already verified) */
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static inline ssize_t hci_vhci_get_user(struct hci_vhci_struct *hci_vhci, const char __user *buf, size_t count)
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static inline ssize_t vhci_get_user(struct vhci_data *vhci,
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const char __user *buf, size_t count)
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{
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struct sk_buff *skb;
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if (count > HCI_MAX_FRAME_SIZE)
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return -EINVAL;
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if (!(skb = bt_skb_alloc(count, GFP_KERNEL)))
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skb = bt_skb_alloc(count, GFP_KERNEL);
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if (!skb)
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return -ENOMEM;
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if (copy_from_user(skb_put(skb, count), buf, count)) {
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kfree_skb(skb);
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return -EFAULT;
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}
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skb->dev = (void *) hci_vhci->hdev;
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skb->dev = (void *) vhci->hdev;
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skb->pkt_type = *((__u8 *) skb->data);
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skb_pull(skb, 1);
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hci_recv_frame(skb);
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return count;
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}
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/* Write */
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static ssize_t hci_vhci_chr_write(struct file * file, const char __user * buf,
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size_t count, loff_t *pos)
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{
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struct hci_vhci_struct *hci_vhci = (struct hci_vhci_struct *) file->private_data;
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if (!access_ok(VERIFY_READ, buf, count))
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return -EFAULT;
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return hci_vhci_get_user(hci_vhci, buf, count);
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}
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/* Put packet to user space buffer(already verified) */
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static inline ssize_t hci_vhci_put_user(struct hci_vhci_struct *hci_vhci,
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struct sk_buff *skb, char __user *buf,
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int count)
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static inline ssize_t vhci_put_user(struct vhci_data *vhci,
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struct sk_buff *skb, char __user *buf, int count)
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{
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int len = count, total = 0;
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char __user *ptr = buf;
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int len, total = 0;
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len = min_t(unsigned int, skb->len, count);
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len = min_t(unsigned int, skb->len, len);
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if (copy_to_user(ptr, skb->data, len))
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return -EFAULT;
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total += len;
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hci_vhci->hdev->stat.byte_tx += len;
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vhci->hdev->stat.byte_tx += len;
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switch (skb->pkt_type) {
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case HCI_COMMAND_PKT:
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hci_vhci->hdev->stat.cmd_tx++;
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vhci->hdev->stat.cmd_tx++;
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break;
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case HCI_ACLDATA_PKT:
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hci_vhci->hdev->stat.acl_tx++;
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vhci->hdev->stat.acl_tx++;
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break;
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case HCI_SCODATA_PKT:
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hci_vhci->hdev->stat.cmd_tx++;
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vhci->hdev->stat.cmd_tx++;
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break;
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};
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return total;
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}
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/* Read */
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static ssize_t hci_vhci_chr_read(struct file * file, char __user * buf, size_t count, loff_t *pos)
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static loff_t vhci_llseek(struct file * file, loff_t offset, int origin)
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{
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return -ESPIPE;
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}
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static ssize_t vhci_read(struct file * file, char __user * buf, size_t count, loff_t *pos)
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{
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struct hci_vhci_struct *hci_vhci = (struct hci_vhci_struct *) file->private_data;
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DECLARE_WAITQUEUE(wait, current);
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struct vhci_data *vhci = file->private_data;
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struct sk_buff *skb;
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ssize_t ret = 0;
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add_wait_queue(&hci_vhci->read_wait, &wait);
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add_wait_queue(&vhci->read_wait, &wait);
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while (count) {
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set_current_state(TASK_INTERRUPTIBLE);
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/* Read frames from device queue */
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if (!(skb = skb_dequeue(&hci_vhci->readq))) {
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skb = skb_dequeue(&vhci->readq);
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if (!skb) {
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if (file->f_flags & O_NONBLOCK) {
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ret = -EAGAIN;
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break;
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}
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if (signal_pending(current)) {
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ret = -ERESTARTSYS;
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break;
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}
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/* Nothing to read, let's sleep */
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schedule();
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continue;
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}
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if (access_ok(VERIFY_WRITE, buf, count))
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ret = hci_vhci_put_user(hci_vhci, skb, buf, count);
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ret = vhci_put_user(vhci, skb, buf, count);
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else
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ret = -EFAULT;
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@ -231,84 +222,90 @@ static ssize_t hci_vhci_chr_read(struct file * file, char __user * buf, size_t c
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break;
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}
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set_current_state(TASK_RUNNING);
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remove_wait_queue(&hci_vhci->read_wait, &wait);
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remove_wait_queue(&vhci->read_wait, &wait);
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return ret;
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}
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static loff_t hci_vhci_chr_lseek(struct file * file, loff_t offset, int origin)
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static ssize_t vhci_write(struct file *file,
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const char __user *buf, size_t count, loff_t *pos)
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{
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return -ESPIPE;
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struct vhci_data *vhci = file->private_data;
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if (!access_ok(VERIFY_READ, buf, count))
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return -EFAULT;
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return vhci_get_user(vhci, buf, count);
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}
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static int hci_vhci_chr_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
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static unsigned int vhci_poll(struct file *file, poll_table *wait)
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{
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struct vhci_data *vhci = file->private_data;
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poll_wait(file, &vhci->read_wait, wait);
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if (!skb_queue_empty(&vhci->readq))
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return POLLIN | POLLRDNORM;
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return POLLOUT | POLLWRNORM;
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}
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static int vhci_ioctl(struct inode *inode, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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return -EINVAL;
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}
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static int hci_vhci_chr_fasync(int fd, struct file *file, int on)
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static int vhci_open(struct inode *inode, struct file *file)
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{
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struct hci_vhci_struct *hci_vhci = (struct hci_vhci_struct *) file->private_data;
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int ret;
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if ((ret = fasync_helper(fd, file, on, &hci_vhci->fasync)) < 0)
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return ret;
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if (on)
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hci_vhci->flags |= VHCI_FASYNC;
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else
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hci_vhci->flags &= ~VHCI_FASYNC;
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return 0;
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}
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static int hci_vhci_chr_open(struct inode *inode, struct file * file)
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{
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struct hci_vhci_struct *hci_vhci = NULL;
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struct vhci_data *vhci;
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struct hci_dev *hdev;
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if (!(hci_vhci = kmalloc(sizeof(struct hci_vhci_struct), GFP_KERNEL)))
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vhci = kmalloc(sizeof(struct vhci_data), GFP_KERNEL);
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if (!vhci)
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return -ENOMEM;
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memset(hci_vhci, 0, sizeof(struct hci_vhci_struct));
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memset(vhci, 0, sizeof(struct vhci_data));
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skb_queue_head_init(&hci_vhci->readq);
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init_waitqueue_head(&hci_vhci->read_wait);
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skb_queue_head_init(&vhci->readq);
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init_waitqueue_head(&vhci->read_wait);
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/* Initialize and register HCI device */
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hdev = hci_alloc_dev();
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if (!hdev) {
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kfree(hci_vhci);
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kfree(vhci);
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return -ENOMEM;
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}
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hci_vhci->hdev = hdev;
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vhci->hdev = hdev;
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hdev->type = HCI_VHCI;
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hdev->driver_data = hci_vhci;
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hdev->driver_data = vhci;
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SET_HCIDEV_DEV(hdev, vhci_miscdev.dev);
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hdev->open = hci_vhci_open;
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hdev->close = hci_vhci_close;
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hdev->flush = hci_vhci_flush;
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hdev->send = hci_vhci_send_frame;
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hdev->destruct = hci_vhci_destruct;
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hdev->open = vhci_open_dev;
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hdev->close = vhci_close_dev;
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hdev->flush = vhci_flush;
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hdev->send = vhci_send_frame;
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hdev->destruct = vhci_destruct;
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hdev->owner = THIS_MODULE;
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if (hci_register_dev(hdev) < 0) {
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kfree(hci_vhci);
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BT_ERR("Can't register HCI device");
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kfree(vhci);
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hci_free_dev(hdev);
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return -EBUSY;
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}
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file->private_data = hci_vhci;
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return nonseekable_open(inode, file);
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file->private_data = vhci;
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return nonseekable_open(inode, file);
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}
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static int hci_vhci_chr_close(struct inode *inode, struct file *file)
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static int vhci_release(struct inode *inode, struct file *file)
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{
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struct hci_vhci_struct *hci_vhci = (struct hci_vhci_struct *) file->private_data;
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struct hci_dev *hdev = hci_vhci->hdev;
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struct vhci_data *vhci = file->private_data;
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struct hci_dev *hdev = vhci->hdev;
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|
||||
if (hci_unregister_dev(hdev) < 0) {
|
||||
BT_ERR("Can't unregister HCI device %s", hdev->name);
|
||||
@ -317,48 +314,71 @@ static int hci_vhci_chr_close(struct inode *inode, struct file *file)
|
||||
hci_free_dev(hdev);
|
||||
|
||||
file->private_data = NULL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct file_operations hci_vhci_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.llseek = hci_vhci_chr_lseek,
|
||||
.read = hci_vhci_chr_read,
|
||||
.write = hci_vhci_chr_write,
|
||||
.poll = hci_vhci_chr_poll,
|
||||
.ioctl = hci_vhci_chr_ioctl,
|
||||
.open = hci_vhci_chr_open,
|
||||
.release = hci_vhci_chr_close,
|
||||
.fasync = hci_vhci_chr_fasync
|
||||
static int vhci_fasync(int fd, struct file *file, int on)
|
||||
{
|
||||
struct vhci_data *vhci = file->private_data;
|
||||
int err;
|
||||
|
||||
err = fasync_helper(fd, file, on, &vhci->fasync);
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
if (on)
|
||||
vhci->flags |= VHCI_FASYNC;
|
||||
else
|
||||
vhci->flags &= ~VHCI_FASYNC;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct file_operations vhci_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.llseek = vhci_llseek,
|
||||
.read = vhci_read,
|
||||
.write = vhci_write,
|
||||
.poll = vhci_poll,
|
||||
.ioctl = vhci_ioctl,
|
||||
.open = vhci_open,
|
||||
.release = vhci_release,
|
||||
.fasync = vhci_fasync,
|
||||
};
|
||||
|
||||
static struct miscdevice hci_vhci_miscdev=
|
||||
{
|
||||
VHCI_MINOR,
|
||||
"hci_vhci",
|
||||
&hci_vhci_fops
|
||||
static struct miscdevice vhci_miscdev= {
|
||||
.name = "vhci",
|
||||
.fops = &vhci_fops,
|
||||
};
|
||||
|
||||
static int __init hci_vhci_init(void)
|
||||
static int __init vhci_init(void)
|
||||
{
|
||||
BT_INFO("VHCI driver ver %s", VERSION);
|
||||
BT_INFO("Virtual HCI driver ver %s", VERSION);
|
||||
|
||||
if (misc_register(&hci_vhci_miscdev)) {
|
||||
BT_ERR("Can't register misc device %d\n", VHCI_MINOR);
|
||||
vhci_miscdev.minor = minor;
|
||||
|
||||
if (misc_register(&vhci_miscdev) < 0) {
|
||||
BT_ERR("Can't register misc device with minor %d", minor);
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void hci_vhci_cleanup(void)
|
||||
static void __exit vhci_exit(void)
|
||||
{
|
||||
misc_deregister(&hci_vhci_miscdev);
|
||||
if (misc_deregister(&vhci_miscdev) < 0)
|
||||
BT_ERR("Can't unregister misc device with minor %d", minor);
|
||||
}
|
||||
|
||||
module_init(hci_vhci_init);
|
||||
module_exit(hci_vhci_cleanup);
|
||||
module_init(vhci_init);
|
||||
module_exit(vhci_exit);
|
||||
|
||||
MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>");
|
||||
MODULE_DESCRIPTION("Bluetooth VHCI driver ver " VERSION);
|
||||
MODULE_LICENSE("GPL");
|
||||
module_param(minor, int, 0444);
|
||||
MODULE_PARM_DESC(minor, "Miscellaneous minor device number");
|
||||
|
||||
MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann <marcel@holtmann.org>");
|
||||
MODULE_DESCRIPTION("Bluetooth virtual HCI driver ver " VERSION);
|
||||
MODULE_VERSION(VERSION);
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
@ -1,50 +0,0 @@
|
||||
/*
|
||||
BlueZ - Bluetooth protocol stack for Linux
|
||||
Copyright (C) 2000-2001 Qualcomm Incorporated
|
||||
|
||||
Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
|
||||
|
||||
This program is free software; you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License version 2 as
|
||||
published by the Free Software Foundation;
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
||||
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
|
||||
IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
|
||||
CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
|
||||
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
||||
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
||||
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||||
|
||||
ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
|
||||
COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
|
||||
SOFTWARE IS DISCLAIMED.
|
||||
*/
|
||||
|
||||
/*
|
||||
* $Id: hci_vhci.h,v 1.1.1.1 2002/03/08 21:03:15 maxk Exp $
|
||||
*/
|
||||
|
||||
#ifndef __HCI_VHCI_H
|
||||
#define __HCI_VHCI_H
|
||||
|
||||
#ifdef __KERNEL__
|
||||
|
||||
struct hci_vhci_struct {
|
||||
struct hci_dev *hdev;
|
||||
__u32 flags;
|
||||
wait_queue_head_t read_wait;
|
||||
struct sk_buff_head readq;
|
||||
struct fasync_struct *fasync;
|
||||
};
|
||||
|
||||
/* VHCI device flags */
|
||||
#define VHCI_FASYNC 0x0010
|
||||
|
||||
#endif /* __KERNEL__ */
|
||||
|
||||
#define VHCI_DEV "/dev/vhci"
|
||||
#define VHCI_MINOR 250
|
||||
|
||||
#endif /* __HCI_VHCI_H */
|
||||
Loading…
Reference in New Issue
Block a user