553 lines
13 KiB
C
553 lines
13 KiB
C
|
/*
|
||
|
|
* Copyright (C) ST-Ericsson AB 2010
|
||
|
|
* Authors: Sjur Brendeland
|
||
|
|
* Daniel Martensson
|
||
|
|
* License terms: GNU General Public License (GPL) version 2
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
|
||
|
|
|
||
|
|
#include <linux/fs.h>
|
||
|
|
#include <linux/hardirq.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/netdevice.h>
|
||
|
|
#include <linux/if_ether.h>
|
||
|
|
#include <linux/ip.h>
|
||
|
|
#include <linux/sched.h>
|
||
|
|
#include <linux/sockios.h>
|
||
|
|
#include <linux/caif/if_caif.h>
|
||
|
|
#include <net/rtnetlink.h>
|
||
|
|
#include <net/caif/caif_layer.h>
|
||
|
|
#include <net/caif/cfpkt.h>
|
||
|
|
#include <net/caif/caif_dev.h>
|
||
|
|
|
||
|
|
/* GPRS PDP connection has MTU to 1500 */
|
||
|
|
#define GPRS_PDP_MTU 1500
|
||
|
|
/* 5 sec. connect timeout */
|
||
|
|
#define CONNECT_TIMEOUT (5 * HZ)
|
||
|
|
#define CAIF_NET_DEFAULT_QUEUE_LEN 500
|
||
|
|
#define UNDEF_CONNID 0xffffffff
|
||
|
|
|
||
|
|
/*This list is protected by the rtnl lock. */
|
||
|
|
static LIST_HEAD(chnl_net_list);
|
||
|
|
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
MODULE_ALIAS_RTNL_LINK("caif");
|
||
|
|
|
||
|
|
enum caif_states {
|
||
|
|
CAIF_CONNECTED = 1,
|
||
|
|
CAIF_CONNECTING,
|
||
|
|
CAIF_DISCONNECTED,
|
||
|
|
CAIF_SHUTDOWN
|
||
|
|
};
|
||
|
|
|
||
|
|
struct chnl_net {
|
||
|
|
struct cflayer chnl;
|
||
|
|
struct caif_connect_request conn_req;
|
||
|
|
struct list_head list_field;
|
||
|
|
struct net_device *netdev;
|
||
|
|
char name[256];
|
||
|
|
wait_queue_head_t netmgmt_wq;
|
||
|
|
/* Flow status to remember and control the transmission. */
|
||
|
|
bool flowenabled;
|
||
|
|
enum caif_states state;
|
||
|
|
};
|
||
|
|
|
||
|
|
static void robust_list_del(struct list_head *delete_node)
|
||
|
|
{
|
||
|
|
struct list_head *list_node;
|
||
|
|
struct list_head *n;
|
||
|
|
ASSERT_RTNL();
|
||
|
|
list_for_each_safe(list_node, n, &chnl_net_list) {
|
||
|
|
if (list_node == delete_node) {
|
||
|
|
list_del(list_node);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
WARN_ON(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int chnl_recv_cb(struct cflayer *layr, struct cfpkt *pkt)
|
||
|
|
{
|
||
|
|
struct sk_buff *skb;
|
||
|
|
struct chnl_net *priv;
|
||
|
|
int pktlen;
|
||
|
|
const u8 *ip_version;
|
||
|
|
u8 buf;
|
||
|
|
|
||
|
|
priv = container_of(layr, struct chnl_net, chnl);
|
||
|
|
if (!priv)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
skb = (struct sk_buff *) cfpkt_tonative(pkt);
|
||
|
|
|
||
|
|
/* Get length of CAIF packet. */
|
||
|
|
pktlen = skb->len;
|
||
|
|
|
||
|
|
/* Pass some minimum information and
|
||
|
|
* send the packet to the net stack.
|
||
|
|
*/
|
||
|
|
skb->dev = priv->netdev;
|
||
|
|
|
||
|
|
/* check the version of IP */
|
||
|
|
ip_version = skb_header_pointer(skb, 0, 1, &buf);
|
||
|
|
if (!ip_version) {
|
||
|
|
kfree_skb(skb);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
switch (*ip_version >> 4) {
|
||
|
|
case 4:
|
||
|
|
skb->protocol = htons(ETH_P_IP);
|
||
|
|
break;
|
||
|
|
case 6:
|
||
|
|
skb->protocol = htons(ETH_P_IPV6);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
kfree_skb(skb);
|
||
|
|
priv->netdev->stats.rx_errors++;
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* If we change the header in loop mode, the checksum is corrupted. */
|
||
|
|
if (priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP)
|
||
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
||
|
|
else
|
||
|
|
skb->ip_summed = CHECKSUM_NONE;
|
||
|
|
|
||
|
|
if (in_interrupt())
|
||
|
|
netif_rx(skb);
|
||
|
|
else
|
||
|
|
netif_rx_ni(skb);
|
||
|
|
|
||
|
|
/* Update statistics. */
|
||
|
|
priv->netdev->stats.rx_packets++;
|
||
|
|
priv->netdev->stats.rx_bytes += pktlen;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int delete_device(struct chnl_net *dev)
|
||
|
|
{
|
||
|
|
ASSERT_RTNL();
|
||
|
|
if (dev->netdev)
|
||
|
|
unregister_netdevice(dev->netdev);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void close_work(struct work_struct *work)
|
||
|
|
{
|
||
|
|
struct chnl_net *dev = NULL;
|
||
|
|
struct list_head *list_node;
|
||
|
|
struct list_head *_tmp;
|
||
|
|
|
||
|
|
rtnl_lock();
|
||
|
|
list_for_each_safe(list_node, _tmp, &chnl_net_list) {
|
||
|
|
dev = list_entry(list_node, struct chnl_net, list_field);
|
||
|
|
if (dev->state == CAIF_SHUTDOWN)
|
||
|
|
dev_close(dev->netdev);
|
||
|
|
}
|
||
|
|
rtnl_unlock();
|
||
|
|
}
|
||
|
|
static DECLARE_WORK(close_worker, close_work);
|
||
|
|
|
||
|
|
static void chnl_hold(struct cflayer *lyr)
|
||
|
|
{
|
||
|
|
struct chnl_net *priv = container_of(lyr, struct chnl_net, chnl);
|
||
|
|
dev_hold(priv->netdev);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void chnl_put(struct cflayer *lyr)
|
||
|
|
{
|
||
|
|
struct chnl_net *priv = container_of(lyr, struct chnl_net, chnl);
|
||
|
|
dev_put(priv->netdev);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void chnl_flowctrl_cb(struct cflayer *layr, enum caif_ctrlcmd flow,
|
||
|
|
int phyid)
|
||
|
|
{
|
||
|
|
struct chnl_net *priv = container_of(layr, struct chnl_net, chnl);
|
||
|
|
pr_debug("NET flowctrl func called flow: %s\n",
|
||
|
|
flow == CAIF_CTRLCMD_FLOW_ON_IND ? "ON" :
|
||
|
|
flow == CAIF_CTRLCMD_INIT_RSP ? "INIT" :
|
||
|
|
flow == CAIF_CTRLCMD_FLOW_OFF_IND ? "OFF" :
|
||
|
|
flow == CAIF_CTRLCMD_DEINIT_RSP ? "CLOSE/DEINIT" :
|
||
|
|
flow == CAIF_CTRLCMD_INIT_FAIL_RSP ? "OPEN_FAIL" :
|
||
|
|
flow == CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND ?
|
||
|
|
"REMOTE_SHUTDOWN" : "UKNOWN CTRL COMMAND");
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
switch (flow) {
|
||
|
|
case CAIF_CTRLCMD_FLOW_OFF_IND:
|
||
|
|
priv->flowenabled = false;
|
||
|
|
netif_stop_queue(priv->netdev);
|
||
|
|
break;
|
||
|
|
case CAIF_CTRLCMD_DEINIT_RSP:
|
||
|
|
priv->state = CAIF_DISCONNECTED;
|
||
|
|
break;
|
||
|
|
case CAIF_CTRLCMD_INIT_FAIL_RSP:
|
||
|
|
priv->state = CAIF_DISCONNECTED;
|
||
|
|
wake_up_interruptible(&priv->netmgmt_wq);
|
||
|
|
break;
|
||
|
|
case CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND:
|
||
|
|
priv->state = CAIF_SHUTDOWN;
|
||
|
|
netif_tx_disable(priv->netdev);
|
||
|
|
schedule_work(&close_worker);
|
||
|
|
break;
|
||
|
|
case CAIF_CTRLCMD_FLOW_ON_IND:
|
||
|
|
priv->flowenabled = true;
|
||
|
|
netif_wake_queue(priv->netdev);
|
||
|
|
break;
|
||
|
|
case CAIF_CTRLCMD_INIT_RSP:
|
||
|
|
caif_client_register_refcnt(&priv->chnl, chnl_hold, chnl_put);
|
||
|
|
priv->state = CAIF_CONNECTED;
|
||
|
|
priv->flowenabled = true;
|
||
|
|
netif_wake_queue(priv->netdev);
|
||
|
|
wake_up_interruptible(&priv->netmgmt_wq);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int chnl_net_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
||
|
|
{
|
||
|
|
struct chnl_net *priv;
|
||
|
|
struct cfpkt *pkt = NULL;
|
||
|
|
int len;
|
||
|
|
int result = -1;
|
||
|
|
/* Get our private data. */
|
||
|
|
priv = netdev_priv(dev);
|
||
|
|
|
||
|
|
if (skb->len > priv->netdev->mtu) {
|
||
|
|
pr_warn("Size of skb exceeded MTU\n");
|
||
|
|
kfree_skb(skb);
|
||
|
|
dev->stats.tx_errors++;
|
||
|
|
return NETDEV_TX_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!priv->flowenabled) {
|
||
|
|
pr_debug("dropping packets flow off\n");
|
||
|
|
kfree_skb(skb);
|
||
|
|
dev->stats.tx_dropped++;
|
||
|
|
return NETDEV_TX_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP)
|
||
|
|
swap(ip_hdr(skb)->saddr, ip_hdr(skb)->daddr);
|
||
|
|
|
||
|
|
/* Store original SKB length. */
|
||
|
|
len = skb->len;
|
||
|
|
|
||
|
|
pkt = cfpkt_fromnative(CAIF_DIR_OUT, (void *) skb);
|
||
|
|
|
||
|
|
/* Send the packet down the stack. */
|
||
|
|
result = priv->chnl.dn->transmit(priv->chnl.dn, pkt);
|
||
|
|
if (result) {
|
||
|
|
dev->stats.tx_dropped++;
|
||
|
|
return NETDEV_TX_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Update statistics. */
|
||
|
|
dev->stats.tx_packets++;
|
||
|
|
dev->stats.tx_bytes += len;
|
||
|
|
|
||
|
|
return NETDEV_TX_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int chnl_net_open(struct net_device *dev)
|
||
|
|
{
|
||
|
|
struct chnl_net *priv = NULL;
|
||
|
|
int result = -1;
|
||
|
|
int llifindex, headroom, tailroom, mtu;
|
||
|
|
struct net_device *lldev;
|
||
|
|
ASSERT_RTNL();
|
||
|
|
priv = netdev_priv(dev);
|
||
|
|
if (!priv) {
|
||
|
|
pr_debug("chnl_net_open: no priv\n");
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (priv->state != CAIF_CONNECTING) {
|
||
|
|
priv->state = CAIF_CONNECTING;
|
||
|
|
result = caif_connect_client(dev_net(dev), &priv->conn_req,
|
||
|
|
&priv->chnl, &llifindex,
|
||
|
|
&headroom, &tailroom);
|
||
|
|
if (result != 0) {
|
||
|
|
pr_debug("err: "
|
||
|
|
"Unable to register and open device,"
|
||
|
|
" Err:%d\n",
|
||
|
|
result);
|
||
|
|
goto error;
|
||
|
|
}
|
||
|
|
|
||
|
|
lldev = __dev_get_by_index(dev_net(dev), llifindex);
|
||
|
|
|
||
|
|
if (lldev == NULL) {
|
||
|
|
pr_debug("no interface?\n");
|
||
|
|
result = -ENODEV;
|
||
|
|
goto error;
|
||
|
|
}
|
||
|
|
|
||
|
|
dev->needed_tailroom = tailroom + lldev->needed_tailroom;
|
||
|
|
dev->hard_header_len = headroom + lldev->hard_header_len +
|
||
|
|
lldev->needed_tailroom;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* MTU, head-room etc is not know before we have a
|
||
|
|
* CAIF link layer device available. MTU calculation may
|
||
|
|
* override initial RTNL configuration.
|
||
|
|
* MTU is minimum of current mtu, link layer mtu pluss
|
||
|
|
* CAIF head and tail, and PDP GPRS contexts max MTU.
|
||
|
|
*/
|
||
|
|
mtu = min_t(int, dev->mtu, lldev->mtu - (headroom + tailroom));
|
||
|
|
mtu = min_t(int, GPRS_PDP_MTU, mtu);
|
||
|
|
dev_set_mtu(dev, mtu);
|
||
|
|
|
||
|
|
if (mtu < 100) {
|
||
|
|
pr_warn("CAIF Interface MTU too small (%d)\n", mtu);
|
||
|
|
result = -ENODEV;
|
||
|
|
goto error;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
rtnl_unlock(); /* Release RTNL lock during connect wait */
|
||
|
|
|
||
|
|
result = wait_event_interruptible_timeout(priv->netmgmt_wq,
|
||
|
|
priv->state != CAIF_CONNECTING,
|
||
|
|
CONNECT_TIMEOUT);
|
||
|
|
|
||
|
|
rtnl_lock();
|
||
|
|
|
||
|
|
if (result == -ERESTARTSYS) {
|
||
|
|
pr_debug("wait_event_interruptible woken by a signal\n");
|
||
|
|
result = -ERESTARTSYS;
|
||
|
|
goto error;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (result == 0) {
|
||
|
|
pr_debug("connect timeout\n");
|
||
|
|
caif_disconnect_client(dev_net(dev), &priv->chnl);
|
||
|
|
priv->state = CAIF_DISCONNECTED;
|
||
|
|
pr_debug("state disconnected\n");
|
||
|
|
result = -ETIMEDOUT;
|
||
|
|
goto error;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (priv->state != CAIF_CONNECTED) {
|
||
|
|
pr_debug("connect failed\n");
|
||
|
|
result = -ECONNREFUSED;
|
||
|
|
goto error;
|
||
|
|
}
|
||
|
|
pr_debug("CAIF Netdevice connected\n");
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
error:
|
||
|
|
caif_disconnect_client(dev_net(dev), &priv->chnl);
|
||
|
|
priv->state = CAIF_DISCONNECTED;
|
||
|
|
pr_debug("state disconnected\n");
|
||
|
|
return result;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
static int chnl_net_stop(struct net_device *dev)
|
||
|
|
{
|
||
|
|
struct chnl_net *priv;
|
||
|
|
|
||
|
|
ASSERT_RTNL();
|
||
|
|
priv = netdev_priv(dev);
|
||
|
|
priv->state = CAIF_DISCONNECTED;
|
||
|
|
caif_disconnect_client(dev_net(dev), &priv->chnl);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int chnl_net_init(struct net_device *dev)
|
||
|
|
{
|
||
|
|
struct chnl_net *priv;
|
||
|
|
ASSERT_RTNL();
|
||
|
|
priv = netdev_priv(dev);
|
||
|
|
strncpy(priv->name, dev->name, sizeof(priv->name));
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void chnl_net_uninit(struct net_device *dev)
|
||
|
|
{
|
||
|
|
struct chnl_net *priv;
|
||
|
|
ASSERT_RTNL();
|
||
|
|
priv = netdev_priv(dev);
|
||
|
|
robust_list_del(&priv->list_field);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct net_device_ops netdev_ops = {
|
||
|
|
.ndo_open = chnl_net_open,
|
||
|
|
.ndo_stop = chnl_net_stop,
|
||
|
|
.ndo_init = chnl_net_init,
|
||
|
|
.ndo_uninit = chnl_net_uninit,
|
||
|
|
.ndo_start_xmit = chnl_net_start_xmit,
|
||
|
|
};
|
||
|
|
|
||
|
|
static void chnl_net_destructor(struct net_device *dev)
|
||
|
|
{
|
||
|
|
struct chnl_net *priv = netdev_priv(dev);
|
||
|
|
caif_free_client(&priv->chnl);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void ipcaif_net_setup(struct net_device *dev)
|
||
|
|
{
|
||
|
|
struct chnl_net *priv;
|
||
|
|
dev->netdev_ops = &netdev_ops;
|
||
|
|
dev->needs_free_netdev = true;
|
||
|
|
dev->priv_destructor = chnl_net_destructor;
|
||
|
|
dev->flags |= IFF_NOARP;
|
||
|
|
dev->flags |= IFF_POINTOPOINT;
|
||
|
|
dev->mtu = GPRS_PDP_MTU;
|
||
|
|
dev->tx_queue_len = CAIF_NET_DEFAULT_QUEUE_LEN;
|
||
|
|
|
||
|
|
priv = netdev_priv(dev);
|
||
|
|
priv->chnl.receive = chnl_recv_cb;
|
||
|
|
priv->chnl.ctrlcmd = chnl_flowctrl_cb;
|
||
|
|
priv->netdev = dev;
|
||
|
|
priv->conn_req.protocol = CAIFPROTO_DATAGRAM;
|
||
|
|
priv->conn_req.link_selector = CAIF_LINK_HIGH_BANDW;
|
||
|
|
priv->conn_req.priority = CAIF_PRIO_LOW;
|
||
|
|
/* Insert illegal value */
|
||
|
|
priv->conn_req.sockaddr.u.dgm.connection_id = UNDEF_CONNID;
|
||
|
|
priv->flowenabled = false;
|
||
|
|
|
||
|
|
init_waitqueue_head(&priv->netmgmt_wq);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static int ipcaif_fill_info(struct sk_buff *skb, const struct net_device *dev)
|
||
|
|
{
|
||
|
|
struct chnl_net *priv;
|
||
|
|
u8 loop;
|
||
|
|
priv = netdev_priv(dev);
|
||
|
|
if (nla_put_u32(skb, IFLA_CAIF_IPV4_CONNID,
|
||
|
|
priv->conn_req.sockaddr.u.dgm.connection_id) ||
|
||
|
|
nla_put_u32(skb, IFLA_CAIF_IPV6_CONNID,
|
||
|
|
priv->conn_req.sockaddr.u.dgm.connection_id))
|
||
|
|
goto nla_put_failure;
|
||
|
|
loop = priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP;
|
||
|
|
if (nla_put_u8(skb, IFLA_CAIF_LOOPBACK, loop))
|
||
|
|
goto nla_put_failure;
|
||
|
|
return 0;
|
||
|
|
nla_put_failure:
|
||
|
|
return -EMSGSIZE;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
static void caif_netlink_parms(struct nlattr *data[],
|
||
|
|
struct caif_connect_request *conn_req)
|
||
|
|
{
|
||
|
|
if (!data) {
|
||
|
|
pr_warn("no params data found\n");
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (data[IFLA_CAIF_IPV4_CONNID])
|
||
|
|
conn_req->sockaddr.u.dgm.connection_id =
|
||
|
|
nla_get_u32(data[IFLA_CAIF_IPV4_CONNID]);
|
||
|
|
if (data[IFLA_CAIF_IPV6_CONNID])
|
||
|
|
conn_req->sockaddr.u.dgm.connection_id =
|
||
|
|
nla_get_u32(data[IFLA_CAIF_IPV6_CONNID]);
|
||
|
|
if (data[IFLA_CAIF_LOOPBACK]) {
|
||
|
|
if (nla_get_u8(data[IFLA_CAIF_LOOPBACK]))
|
||
|
|
conn_req->protocol = CAIFPROTO_DATAGRAM_LOOP;
|
||
|
|
else
|
||
|
|
conn_req->protocol = CAIFPROTO_DATAGRAM;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ipcaif_newlink(struct net *src_net, struct net_device *dev,
|
||
|
|
struct nlattr *tb[], struct nlattr *data[],
|
||
|
|
struct netlink_ext_ack *extack)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
struct chnl_net *caifdev;
|
||
|
|
ASSERT_RTNL();
|
||
|
|
caifdev = netdev_priv(dev);
|
||
|
|
caif_netlink_parms(data, &caifdev->conn_req);
|
||
|
|
|
||
|
|
ret = register_netdevice(dev);
|
||
|
|
if (ret)
|
||
|
|
pr_warn("device rtml registration failed\n");
|
||
|
|
else
|
||
|
|
list_add(&caifdev->list_field, &chnl_net_list);
|
||
|
|
|
||
|
|
/* Use ifindex as connection id, and use loopback channel default. */
|
||
|
|
if (caifdev->conn_req.sockaddr.u.dgm.connection_id == UNDEF_CONNID) {
|
||
|
|
caifdev->conn_req.sockaddr.u.dgm.connection_id = dev->ifindex;
|
||
|
|
caifdev->conn_req.protocol = CAIFPROTO_DATAGRAM_LOOP;
|
||
|
|
}
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ipcaif_changelink(struct net_device *dev, struct nlattr *tb[],
|
||
|
|
struct nlattr *data[],
|
||
|
|
struct netlink_ext_ack *extack)
|
||
|
|
{
|
||
|
|
struct chnl_net *caifdev;
|
||
|
|
ASSERT_RTNL();
|
||
|
|
caifdev = netdev_priv(dev);
|
||
|
|
caif_netlink_parms(data, &caifdev->conn_req);
|
||
|
|
netdev_state_change(dev);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static size_t ipcaif_get_size(const struct net_device *dev)
|
||
|
|
{
|
||
|
|
return
|
||
|
|
/* IFLA_CAIF_IPV4_CONNID */
|
||
|
|
nla_total_size(4) +
|
||
|
|
/* IFLA_CAIF_IPV6_CONNID */
|
||
|
|
nla_total_size(4) +
|
||
|
|
/* IFLA_CAIF_LOOPBACK */
|
||
|
|
nla_total_size(2) +
|
||
|
|
0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct nla_policy ipcaif_policy[IFLA_CAIF_MAX + 1] = {
|
||
|
|
[IFLA_CAIF_IPV4_CONNID] = { .type = NLA_U32 },
|
||
|
|
[IFLA_CAIF_IPV6_CONNID] = { .type = NLA_U32 },
|
||
|
|
[IFLA_CAIF_LOOPBACK] = { .type = NLA_U8 }
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
static struct rtnl_link_ops ipcaif_link_ops __read_mostly = {
|
||
|
|
.kind = "caif",
|
||
|
|
.priv_size = sizeof(struct chnl_net),
|
||
|
|
.setup = ipcaif_net_setup,
|
||
|
|
.maxtype = IFLA_CAIF_MAX,
|
||
|
|
.policy = ipcaif_policy,
|
||
|
|
.newlink = ipcaif_newlink,
|
||
|
|
.changelink = ipcaif_changelink,
|
||
|
|
.get_size = ipcaif_get_size,
|
||
|
|
.fill_info = ipcaif_fill_info,
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init chnl_init_module(void)
|
||
|
|
{
|
||
|
|
return rtnl_link_register(&ipcaif_link_ops);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __exit chnl_exit_module(void)
|
||
|
|
{
|
||
|
|
struct chnl_net *dev = NULL;
|
||
|
|
struct list_head *list_node;
|
||
|
|
struct list_head *_tmp;
|
||
|
|
rtnl_link_unregister(&ipcaif_link_ops);
|
||
|
|
rtnl_lock();
|
||
|
|
list_for_each_safe(list_node, _tmp, &chnl_net_list) {
|
||
|
|
dev = list_entry(list_node, struct chnl_net, list_field);
|
||
|
|
list_del(list_node);
|
||
|
|
delete_device(dev);
|
||
|
|
}
|
||
|
|
rtnl_unlock();
|
||
|
|
}
|
||
|
|
|
||
|
|
module_init(chnl_init_module);
|
||
|
|
module_exit(chnl_exit_module);
|