Release 4.8 net/bluetooth/cmtp/capi.c

Directory: net/bluetooth/cmtp
/*
   CMTP implementation for Linux Bluetooth stack (BlueZ).
   Copyright (C) 2002-2003 Marcel Holtmann <marcel@holtmann.org>

   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.
*/

#include <linux/export.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/fcntl.h>
#include <linux/skbuff.h>
#include <linux/socket.h>
#include <linux/ioctl.h>
#include <linux/file.h>
#include <linux/wait.h>
#include <linux/kthread.h>
#include <net/sock.h>

#include <linux/isdn/capilli.h>
#include <linux/isdn/capicmd.h>
#include <linux/isdn/capiutil.h>

#include "cmtp.h"


#define CAPI_INTEROPERABILITY		0x20


#define CAPI_INTEROPERABILITY_REQ	CAPICMD(CAPI_INTEROPERABILITY, CAPI_REQ)

#define CAPI_INTEROPERABILITY_CONF	CAPICMD(CAPI_INTEROPERABILITY, CAPI_CONF)

#define CAPI_INTEROPERABILITY_IND	CAPICMD(CAPI_INTEROPERABILITY, CAPI_IND)

#define CAPI_INTEROPERABILITY_RESP	CAPICMD(CAPI_INTEROPERABILITY, CAPI_RESP)


#define CAPI_INTEROPERABILITY_REQ_LEN	(CAPI_MSG_BASELEN + 2)

#define CAPI_INTEROPERABILITY_CONF_LEN	(CAPI_MSG_BASELEN + 4)

#define CAPI_INTEROPERABILITY_IND_LEN	(CAPI_MSG_BASELEN + 2)

#define CAPI_INTEROPERABILITY_RESP_LEN	(CAPI_MSG_BASELEN + 2)


#define CAPI_FUNCTION_REGISTER		0

#define CAPI_FUNCTION_RELEASE		1

#define CAPI_FUNCTION_GET_PROFILE	2

#define CAPI_FUNCTION_GET_MANUFACTURER	3

#define CAPI_FUNCTION_GET_VERSION	4

#define CAPI_FUNCTION_GET_SERIAL_NUMBER	5

#define CAPI_FUNCTION_MANUFACTURER	6

#define CAPI_FUNCTION_LOOPBACK		7



#define CMTP_MSGNUM	1

#define CMTP_APPLID	2

#define CMTP_MAPPING	3



static struct cmtp_application *cmtp_application_add(struct cmtp_session *session, __u16 appl)
{
	struct cmtp_application *app = kzalloc(sizeof(*app), GFP_KERNEL);

	BT_DBG("session %p application %p appl %d", session, app, appl);

	if (!app)
		return NULL;

	app->state = BT_OPEN;
	app->appl = appl;

	list_add_tail(&app->list, &session->applications);

	return app;
}

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marcel holtmann marcel holtmann 79 100.00% 2 100.00%
Total 79 100.00% 2 100.00%



static void cmtp_application_del(struct cmtp_session *session, struct cmtp_application *app)
{
	BT_DBG("session %p application %p", session, app);

	if (app) {
		list_del(&app->list);
		kfree(app);
	}
}

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marcel holtmann marcel holtmann 44 100.00% 1 100.00%
Total 44 100.00% 1 100.00%



static struct cmtp_application *cmtp_application_get(struct cmtp_session *session, int pattern, __u16 value)
{
	struct cmtp_application *app;

	list_for_each_entry(app, &session->applications, list) {
		switch (pattern) {
		case CMTP_MSGNUM:
			if (app->msgnum == value)
				return app;
			break;
		case CMTP_APPLID:
			if (app->appl == value)
				return app;
			break;
		case CMTP_MAPPING:
			if (app->mapping == value)
				return app;
			break;
		}
	}

	return NULL;
}

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marcel holtmann marcel holtmann 84 95.45% 1 50.00%
geliang tang geliang tang 4 4.55% 1 50.00%
Total 88 100.00% 2 100.00%



static int cmtp_msgnum_get(struct cmtp_session *session)
{
	session->msgnum++;

	if ((session->msgnum & 0xff) > 200)
		session->msgnum = CMTP_INITIAL_MSGNUM + 1;

	return session->msgnum;
}

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marcel holtmann marcel holtmann 41 100.00% 1 100.00%
Total 41 100.00% 1 100.00%



static void cmtp_send_capimsg(struct cmtp_session *session, struct sk_buff *skb)
{
	struct cmtp_scb *scb = (void *) skb->cb;

	BT_DBG("session %p skb %p len %d", session, skb, skb->len);

	scb->id = -1;
	scb->data = (CAPIMSG_COMMAND(skb->data) == CAPI_DATA_B3);

	skb_queue_tail(&session->transmit, skb);

	wake_up_interruptible(sk_sleep(session->sock->sk));
}

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marcel holtmann marcel holtmann 78 90.70% 1 50.00%
szymon janc szymon janc 8 9.30% 1 50.00%
Total 86 100.00% 2 100.00%



static void cmtp_send_interopmsg(struct cmtp_session *session,
					__u8 subcmd, __u16 appl, __u16 msgnum,
					__u16 function, unsigned char *buf, int len)
{
	struct sk_buff *skb;
	unsigned char *s;

	BT_DBG("session %p subcmd 0x%02x appl %d msgnum %d", session, subcmd, appl, msgnum);

	skb = alloc_skb(CAPI_MSG_BASELEN + 6 + len, GFP_ATOMIC);
	if (!skb) {
		BT_ERR("Can't allocate memory for interoperability packet");
		return;
	}

	s = skb_put(skb, CAPI_MSG_BASELEN + 6 + len);

	capimsg_setu16(s, 0, CAPI_MSG_BASELEN + 6 + len);
	capimsg_setu16(s, 2, appl);
	capimsg_setu8 (s, 4, CAPI_INTEROPERABILITY);
	capimsg_setu8 (s, 5, subcmd);
	capimsg_setu16(s, 6, msgnum);

	/* Interoperability selector (Bluetooth Device Management) */
	capimsg_setu16(s, 8, 0x0001);

	capimsg_setu8 (s, 10, 3 + len);
	capimsg_setu16(s, 11, function);
	capimsg_setu8 (s, 13, len);

	if (len > 0)
		memcpy(s + 14, buf, len);

	cmtp_send_capimsg(session, skb);
}

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andrei emeltchenko andrei emeltchenko 5 2.44% 1 50.00%
Total 205 100.00% 2 100.00%



static void cmtp_recv_interopmsg(struct cmtp_session *session, struct sk_buff *skb)
{
	struct capi_ctr *ctrl = &session->ctrl;
	struct cmtp_application *application;
	__u16 appl, msgnum, func, info;
	__u32 controller;

	BT_DBG("session %p skb %p len %d", session, skb, skb->len);

	switch (CAPIMSG_SUBCOMMAND(skb->data)) {
	case CAPI_CONF:
		if (skb->len < CAPI_MSG_BASELEN + 10)
			break;

		func = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 5);
		info = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 8);

		switch (func) {
		case CAPI_FUNCTION_REGISTER:
			msgnum = CAPIMSG_MSGID(skb->data);

			application = cmtp_application_get(session, CMTP_MSGNUM, msgnum);
			if (application) {
				application->state = BT_CONNECTED;
				application->msgnum = 0;
				application->mapping = CAPIMSG_APPID(skb->data);
				wake_up_interruptible(&session->wait);
			}

			break;

		case CAPI_FUNCTION_RELEASE:
			appl = CAPIMSG_APPID(skb->data);

			application = cmtp_application_get(session, CMTP_MAPPING, appl);
			if (application) {
				application->state = BT_CLOSED;
				application->msgnum = 0;
				wake_up_interruptible(&session->wait);
			}

			break;

		case CAPI_FUNCTION_GET_PROFILE:
			if (skb->len < CAPI_MSG_BASELEN + 11 + sizeof(capi_profile))
				break;

			controller = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 11);
			msgnum = CAPIMSG_MSGID(skb->data);

			if (!info && (msgnum == CMTP_INITIAL_MSGNUM)) {
				session->ncontroller = controller;
				wake_up_interruptible(&session->wait);
				break;
			}

			if (!info && ctrl) {
				memcpy(&ctrl->profile,
					skb->data + CAPI_MSG_BASELEN + 11,
					sizeof(capi_profile));
				session->state = BT_CONNECTED;
				capi_ctr_ready(ctrl);
			}

			break;

		case CAPI_FUNCTION_GET_MANUFACTURER:
			if (skb->len < CAPI_MSG_BASELEN + 15)
				break;

			if (!info && ctrl) {
				int len = min_t(uint, CAPI_MANUFACTURER_LEN,
						skb->data[CAPI_MSG_BASELEN + 14]);

				memset(ctrl->manu, 0, CAPI_MANUFACTURER_LEN);
				strncpy(ctrl->manu,
					skb->data + CAPI_MSG_BASELEN + 15, len);
			}

			break;

		case CAPI_FUNCTION_GET_VERSION:
			if (skb->len < CAPI_MSG_BASELEN + 32)
				break;

			if (!info && ctrl) {
				ctrl->version.majorversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 16);
				ctrl->version.minorversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 20);
				ctrl->version.majormanuversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 24);
				ctrl->version.minormanuversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 28);
			}

			break;

		case CAPI_FUNCTION_GET_SERIAL_NUMBER:
			if (skb->len < CAPI_MSG_BASELEN + 17)
				break;

			if (!info && ctrl) {
				int len = min_t(uint, CAPI_SERIAL_LEN,
						skb->data[CAPI_MSG_BASELEN + 16]);

				memset(ctrl->serial, 0, CAPI_SERIAL_LEN);
				strncpy(ctrl->serial,
					skb->data + CAPI_MSG_BASELEN + 17, len);
			}

			break;
		}

		break;

	case CAPI_IND:
		if (skb->len < CAPI_MSG_BASELEN + 6)
			break;

		func = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 3);

		if (func == CAPI_FUNCTION_LOOPBACK) {
			int len = min_t(uint, skb->len - CAPI_MSG_BASELEN - 6,
						skb->data[CAPI_MSG_BASELEN + 5]);
			appl = CAPIMSG_APPID(skb->data);
			msgnum = CAPIMSG_MSGID(skb->data);
			cmtp_send_interopmsg(session, CAPI_RESP, appl, msgnum, func,
						skb->data + CAPI_MSG_BASELEN + 6, len);
		}

		break;
	}

	kfree_skb(skb);
}

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Total 677 100.00% 2 100.00%



void cmtp_recv_capimsg(struct cmtp_session *session, struct sk_buff *skb)
{
	struct capi_ctr *ctrl = &session->ctrl;
	struct cmtp_application *application;
	__u16 appl;
	__u32 contr;

	BT_DBG("session %p skb %p len %d", session, skb, skb->len);

	if (skb->len < CAPI_MSG_BASELEN)
		return;

	if (CAPIMSG_COMMAND(skb->data) == CAPI_INTEROPERABILITY) {
		cmtp_recv_interopmsg(session, skb);
		return;
	}

	if (session->flags & BIT(CMTP_LOOPBACK)) {
		kfree_skb(skb);
		return;
	}

	appl = CAPIMSG_APPID(skb->data);
	contr = CAPIMSG_CONTROL(skb->data);

	application = cmtp_application_get(session, CMTP_MAPPING, appl);
	if (application) {
		appl = application->appl;
		CAPIMSG_SETAPPID(skb->data, appl);
	} else {
		BT_ERR("Can't find application with id %d", appl);
		kfree_skb(skb);
		return;
	}

	if ((contr & 0x7f) == 0x01) {
		contr = (contr & 0xffffff80) | session->num;
		CAPIMSG_SETCONTROL(skb->data, contr);
	}

	capi_ctr_handle_message(ctrl, appl, skb);
}

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Total 206 100.00% 3 100.00%



static int cmtp_load_firmware(struct capi_ctr *ctrl, capiloaddata *data)
{
	BT_DBG("ctrl %p data %p", ctrl, data);

	return 0;
}

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marcel holtmann marcel holtmann 27 100.00% 1 100.00%
Total 27 100.00% 1 100.00%



static void cmtp_reset_ctr(struct capi_ctr *ctrl)
{
	struct cmtp_session *session = ctrl->driverdata;

	BT_DBG("ctrl %p", ctrl);

	capi_ctr_down(ctrl);

	atomic_inc(&session->terminate);
	wake_up_process(session->task);
}

Contributors
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marcel holtmann marcel holtmann 36 76.60% 1 25.00%
peter hurley peter hurley 9 19.15% 1 25.00%
tilman schmidt tilman schmidt 1 2.13% 1 25.00%
szymon janc szymon janc 1 2.13% 1 25.00%
Total 47 100.00% 4 100.00%



static void cmtp_register_appl(struct capi_ctr *ctrl, __u16 appl, capi_register_params *rp)
{
	DECLARE_WAITQUEUE(wait, current);
	struct cmtp_session *session = ctrl->driverdata;
	struct cmtp_application *application;
	unsigned long timeo = CMTP_INTEROP_TIMEOUT;
	unsigned char buf[8];
	int err = 0, nconn, want = rp->level3cnt;

	BT_DBG("ctrl %p appl %d level3cnt %d datablkcnt %d datablklen %d",
		ctrl, appl, rp->level3cnt, rp->datablkcnt, rp->datablklen);

	application = cmtp_application_add(session, appl);
	if (!application) {
		BT_ERR("Can't allocate memory for new application");
		return;
	}

	if (want < 0)
		nconn = ctrl->profile.nbchannel * -want;
	else
		nconn = want;

	if (nconn == 0)
		nconn = ctrl->profile.nbchannel;

	capimsg_setu16(buf, 0, nconn);
	capimsg_setu16(buf, 2, rp->datablkcnt);
	capimsg_setu16(buf, 4, rp->datablklen);

	application->state = BT_CONFIG;
	application->msgnum = cmtp_msgnum_get(session);

	cmtp_send_interopmsg(session, CAPI_REQ, 0x0000, application->msgnum,
				CAPI_FUNCTION_REGISTER, buf, 6);

	add_wait_queue(&session->wait, &wait);
	while (1) {
		set_current_state(TASK_INTERRUPTIBLE);

		if (!timeo) {
			err = -EAGAIN;
			break;
		}

		if (application->state == BT_CLOSED) {
			err = -application->err;
			break;
		}

		if (application->state == BT_CONNECTED)
			break;

		if (signal_pending(current)) {
			err = -EINTR;
			break;
		}

		timeo = schedule_timeout(timeo);
	}
	set_current_state(TASK_RUNNING);
	remove_wait_queue(&session->wait, &wait);

	if (err) {
		cmtp_application_del(session, application);
		return;
	}
}

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marcel holtmann marcel holtmann 323 100.00% 1 100.00%
Total 323 100.00% 1 100.00%



static void cmtp_release_appl(struct capi_ctr *ctrl, __u16 appl)
{
	struct cmtp_session *session = ctrl->driverdata;
	struct cmtp_application *application;

	BT_DBG("ctrl %p appl %d", ctrl, appl);

	application = cmtp_application_get(session, CMTP_APPLID, appl);
	if (!application) {
		BT_ERR("Can't find application");
		return;
	}

	application->msgnum = cmtp_msgnum_get(session);

	cmtp_send_interopmsg(session, CAPI_REQ, application->mapping, application->msgnum,
				CAPI_FUNCTION_RELEASE, NULL, 0);

	wait_event_interruptible_timeout(session->wait,
			(application->state == BT_CLOSED), CMTP_INTEROP_TIMEOUT);

	cmtp_application_del(session, application);
}

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marcel holtmann marcel holtmann 115 100.00% 2 100.00%
Total 115 100.00% 2 100.00%



static u16 cmtp_send_message(struct capi_ctr *ctrl, struct sk_buff *skb)
{
	struct cmtp_session *session = ctrl->driverdata;
	struct cmtp_application *application;
	__u16 appl;
	__u32 contr;

	BT_DBG("ctrl %p skb %p", ctrl, skb);

	appl = CAPIMSG_APPID(skb->data);
	contr = CAPIMSG_CONTROL(skb->data);

	application = cmtp_application_get(session, CMTP_APPLID, appl);
	if ((!application) || (application->state != BT_CONNECTED)) {
		BT_ERR("Can't find application with id %d", appl);
		return CAPI_ILLAPPNR;
	}

	CAPIMSG_SETAPPID(skb->data, application->mapping);

	if ((contr & 0x7f) == session->num) {
		contr = (contr & 0xffffff80) | 0x01;
		CAPIMSG_SETCONTROL(skb->data, contr);
	}

	cmtp_send_capimsg(session, skb);

	return CAPI_NOERROR;
}

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marcel holtmann marcel holtmann 155 100.00% 1 100.00%
Total 155 100.00% 1 100.00%



static char *cmtp_procinfo(struct capi_ctr *ctrl)
{
	return "CAPI Message Transport Protocol";
}

Contributors
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marcel holtmann marcel holtmann 15 100.00% 1 100.00%
Total 15 100.00% 1 100.00%



static int cmtp_proc_show(struct seq_file *m, void *v)
{
	struct capi_ctr *ctrl = m->private;
	struct cmtp_session *session = ctrl->driverdata;
	struct cmtp_application *app;

	seq_printf(m, "%s\n\n", cmtp_procinfo(ctrl));
	seq_printf(m, "addr %s\n", session->name);
	seq_printf(m, "ctrl %d\n", session->num);

	list_for_each_entry(app, &session->applications, list) {
		seq_printf(m, "appl %d -> %d\n", app->appl, app->mapping);
	}

	return 0;
}

Contributors
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marcel holtmann marcel holtmann 74 74.00% 1 33.33%
alexey dobriyan alexey dobriyan 22 22.00% 1 33.33%
geliang tang geliang tang 4 4.00% 1 33.33%
Total 100 100.00% 3 100.00%



static int cmtp_proc_open(struct inode *inode, struct file *file)
{
	return single_open(file, cmtp_proc_show, PDE_DATA(inode));
}

Contributors
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alexey dobriyan alexey dobriyan 25 86.21% 1 33.33%
marcel holtmann marcel holtmann 3 10.34% 1 33.33%
al viro al viro 1 3.45% 1 33.33%
Total 29 100.00% 3 100.00%


static const struct file_operations cmtp_proc_fops = {
	.owner		= THIS_MODULE,
	.open		= cmtp_proc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};



int cmtp_attach_device(struct cmtp_session *session)
{
	unsigned char buf[4];
	long ret;

	BT_DBG("session %p", session);

	capimsg_setu32(buf, 0, 0);

	cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, CMTP_INITIAL_MSGNUM,
				CAPI_FUNCTION_GET_PROFILE, buf, 4);

	ret = wait_event_interruptible_timeout(session->wait,
			session->ncontroller, CMTP_INTEROP_TIMEOUT);

	BT_INFO("Found %d CAPI controller(s) on device %s", session->ncontroller, session->name);

	if (!ret)
		return -ETIMEDOUT;

	if (!session->ncontroller)
		return -ENODEV;

	if (session->ncontroller > 1)
		BT_INFO("Setting up only CAPI controller 1");

	session->ctrl.owner      = THIS_MODULE;
	session->ctrl.driverdata = session;
	strcpy(session->ctrl.name, session->name);

	session->ctrl.driver_name   = "cmtp";
	session->ctrl.load_firmware = cmtp_load_firmware;
	session->ctrl.reset_ctr     = cmtp_reset_ctr;
	session->ctrl.register_appl = cmtp_register_appl;
	session->ctrl.release_appl  = cmtp_release_appl;
	session->ctrl.send_message  = cmtp_send_message;

	session->ctrl.procinfo      = cmtp_procinfo;
	session->ctrl.proc_fops = &cmtp_proc_fops;

	if (attach_capi_ctr(&session->ctrl) < 0) {
		BT_ERR("Can't attach new controller");
		return -EBUSY;
	}

	session->num = session->ctrl.cnr;

	BT_DBG("session %p num %d", session, session->num);

	capimsg_setu32(buf, 0, 1);

	cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, cmtp_msgnum_get(session),
				CAPI_FUNCTION_GET_MANUFACTURER, buf, 4);

	cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, cmtp_msgnum_get(session),
				CAPI_FUNCTION_GET_VERSION, buf, 4);

	cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, cmtp_msgnum_get(session),
				CAPI_FUNCTION_GET_SERIAL_NUMBER, buf, 4);

	cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, cmtp_msgnum_get(session),
				CAPI_FUNCTION_GET_PROFILE, buf, 4);

	return 0;
}

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marcel holtmann marcel holtmann 341 99.13% 2 66.67%
alexey dobriyan alexey dobriyan 3 0.87% 1 33.33%
Total 344 100.00% 3 100.00%



void cmtp_detach_device(struct cmtp_session *session)
{
	BT_DBG("session %p", session);

	detach_capi_ctr(&session->ctrl);
}
Contributors
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marcel holtmann marcel holtmann 25 100.00% 1 100.00%
Total 25 100.00% 1 100.00%

Overall Contributors
Person Tokens Prop Commits CommitProp
marcel holtmann marcel holtmann 2656 95.44% 6 40.00%
alexey dobriyan alexey dobriyan 89 3.20% 1 6.67%
szymon janc szymon janc 12 0.43% 1 6.67%
peter hurley peter hurley 9 0.32% 1 6.67%
geliang tang geliang tang 8 0.29% 1 6.67%
andrei emeltchenko andrei emeltchenko 5 0.18% 1 6.67%
hideaki yoshifuji hideaki yoshifuji 1 0.04% 1 6.67%
tilman schmidt tilman schmidt 1 0.04% 1 6.67%
al viro al viro 1 0.04% 1 6.67%
syam sidhardhan syam sidhardhan 1 0.04% 1 6.67%
Total 2783 100.00% 15 100.00%
  Directory: net/bluetooth/cmtp

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	Total	79	100.00%	2	100.00%
cregit-Linux how code gets into the kernel

Release 4.8 net/bluetooth/cmtp/capi.c

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