^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) ST-Ericsson AB 2010
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Authors: Sjur Brendeland
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Daniel Martensson
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/if_ether.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/ip.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/sockios.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/caif/if_caif.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <net/rtnetlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <net/caif/caif_layer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <net/caif/cfpkt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <net/caif/caif_dev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) /* GPRS PDP connection has MTU to 1500 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define GPRS_PDP_MTU 1500
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) /* 5 sec. connect timeout */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define CONNECT_TIMEOUT (5 * HZ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define CAIF_NET_DEFAULT_QUEUE_LEN 500
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define UNDEF_CONNID 0xffffffff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) /*This list is protected by the rtnl lock. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static LIST_HEAD(chnl_net_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) MODULE_ALIAS_RTNL_LINK("caif");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) enum caif_states {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) CAIF_CONNECTED = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) CAIF_CONNECTING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) CAIF_DISCONNECTED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) CAIF_SHUTDOWN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct chnl_net {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct cflayer chnl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct caif_connect_request conn_req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct list_head list_field;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct net_device *netdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) char name[256];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) wait_queue_head_t netmgmt_wq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /* Flow status to remember and control the transmission. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) bool flowenabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) enum caif_states state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static int chnl_recv_cb(struct cflayer *layr, struct cfpkt *pkt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) struct chnl_net *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) int pktlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) const u8 *ip_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) u8 buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) priv = container_of(layr, struct chnl_net, chnl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) skb = (struct sk_buff *) cfpkt_tonative(pkt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) /* Get length of CAIF packet. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) pktlen = skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) /* Pass some minimum information and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * send the packet to the net stack.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) skb->dev = priv->netdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) /* check the version of IP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) ip_version = skb_header_pointer(skb, 0, 1, &buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (!ip_version) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) switch (*ip_version >> 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) case 4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) skb->protocol = htons(ETH_P_IP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) case 6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) skb->protocol = htons(ETH_P_IPV6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) priv->netdev->stats.rx_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) /* If we change the header in loop mode, the checksum is corrupted. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if (priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) skb->ip_summed = CHECKSUM_UNNECESSARY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) skb->ip_summed = CHECKSUM_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (in_interrupt())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) netif_rx(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) netif_rx_ni(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) /* Update statistics. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) priv->netdev->stats.rx_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) priv->netdev->stats.rx_bytes += pktlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static int delete_device(struct chnl_net *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) if (dev->netdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) unregister_netdevice(dev->netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static void close_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) struct chnl_net *dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) struct list_head *list_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) struct list_head *_tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) rtnl_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) list_for_each_safe(list_node, _tmp, &chnl_net_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) dev = list_entry(list_node, struct chnl_net, list_field);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if (dev->state == CAIF_SHUTDOWN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) dev_close(dev->netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) rtnl_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static DECLARE_WORK(close_worker, close_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) static void chnl_hold(struct cflayer *lyr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) struct chnl_net *priv = container_of(lyr, struct chnl_net, chnl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) dev_hold(priv->netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static void chnl_put(struct cflayer *lyr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) struct chnl_net *priv = container_of(lyr, struct chnl_net, chnl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) dev_put(priv->netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) static void chnl_flowctrl_cb(struct cflayer *layr, enum caif_ctrlcmd flow,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) int phyid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) struct chnl_net *priv = container_of(layr, struct chnl_net, chnl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) pr_debug("NET flowctrl func called flow: %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) flow == CAIF_CTRLCMD_FLOW_ON_IND ? "ON" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) flow == CAIF_CTRLCMD_INIT_RSP ? "INIT" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) flow == CAIF_CTRLCMD_FLOW_OFF_IND ? "OFF" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) flow == CAIF_CTRLCMD_DEINIT_RSP ? "CLOSE/DEINIT" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) flow == CAIF_CTRLCMD_INIT_FAIL_RSP ? "OPEN_FAIL" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) flow == CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) "REMOTE_SHUTDOWN" : "UNKNOWN CTRL COMMAND");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) switch (flow) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) case CAIF_CTRLCMD_FLOW_OFF_IND:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) priv->flowenabled = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) netif_stop_queue(priv->netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) case CAIF_CTRLCMD_DEINIT_RSP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) priv->state = CAIF_DISCONNECTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) case CAIF_CTRLCMD_INIT_FAIL_RSP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) priv->state = CAIF_DISCONNECTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) wake_up_interruptible(&priv->netmgmt_wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) case CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) priv->state = CAIF_SHUTDOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) netif_tx_disable(priv->netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) schedule_work(&close_worker);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) case CAIF_CTRLCMD_FLOW_ON_IND:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) priv->flowenabled = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) netif_wake_queue(priv->netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) case CAIF_CTRLCMD_INIT_RSP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) caif_client_register_refcnt(&priv->chnl, chnl_hold, chnl_put);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) priv->state = CAIF_CONNECTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) priv->flowenabled = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) netif_wake_queue(priv->netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) wake_up_interruptible(&priv->netmgmt_wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) static netdev_tx_t chnl_net_start_xmit(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) struct chnl_net *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) struct cfpkt *pkt = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) int result = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) /* Get our private data. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) priv = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) if (skb->len > priv->netdev->mtu) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) pr_warn("Size of skb exceeded MTU\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) dev->stats.tx_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) return NETDEV_TX_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) if (!priv->flowenabled) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) pr_debug("dropping packets flow off\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) dev->stats.tx_dropped++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) return NETDEV_TX_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) swap(ip_hdr(skb)->saddr, ip_hdr(skb)->daddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) /* Store original SKB length. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) len = skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) pkt = cfpkt_fromnative(CAIF_DIR_OUT, (void *) skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) /* Send the packet down the stack. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) result = priv->chnl.dn->transmit(priv->chnl.dn, pkt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) if (result) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) dev->stats.tx_dropped++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) return NETDEV_TX_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) /* Update statistics. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) dev->stats.tx_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) dev->stats.tx_bytes += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) return NETDEV_TX_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) static int chnl_net_open(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) struct chnl_net *priv = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) int result = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) int llifindex, headroom, tailroom, mtu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) struct net_device *lldev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) priv = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) if (!priv) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) pr_debug("chnl_net_open: no priv\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) if (priv->state != CAIF_CONNECTING) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) priv->state = CAIF_CONNECTING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) result = caif_connect_client(dev_net(dev), &priv->conn_req,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) &priv->chnl, &llifindex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) &headroom, &tailroom);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) if (result != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) pr_debug("err: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) "Unable to register and open device,"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) " Err:%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) lldev = __dev_get_by_index(dev_net(dev), llifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) if (lldev == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) pr_debug("no interface?\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) result = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) dev->needed_tailroom = tailroom + lldev->needed_tailroom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) dev->hard_header_len = headroom + lldev->hard_header_len +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) lldev->needed_tailroom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) * MTU, head-room etc is not know before we have a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) * CAIF link layer device available. MTU calculation may
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) * override initial RTNL configuration.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) * MTU is minimum of current mtu, link layer mtu pluss
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) * CAIF head and tail, and PDP GPRS contexts max MTU.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) mtu = min_t(int, dev->mtu, lldev->mtu - (headroom + tailroom));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) mtu = min_t(int, GPRS_PDP_MTU, mtu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) dev_set_mtu(dev, mtu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) if (mtu < 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) pr_warn("CAIF Interface MTU too small (%d)\n", mtu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) result = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) rtnl_unlock(); /* Release RTNL lock during connect wait */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) result = wait_event_interruptible_timeout(priv->netmgmt_wq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) priv->state != CAIF_CONNECTING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) CONNECT_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) rtnl_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) if (result == -ERESTARTSYS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) pr_debug("wait_event_interruptible woken by a signal\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) result = -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) if (result == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) pr_debug("connect timeout\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) caif_disconnect_client(dev_net(dev), &priv->chnl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) priv->state = CAIF_DISCONNECTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) pr_debug("state disconnected\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) result = -ETIMEDOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if (priv->state != CAIF_CONNECTED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) pr_debug("connect failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) result = -ECONNREFUSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) pr_debug("CAIF Netdevice connected\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) caif_disconnect_client(dev_net(dev), &priv->chnl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) priv->state = CAIF_DISCONNECTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) pr_debug("state disconnected\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) static int chnl_net_stop(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) struct chnl_net *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) priv = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) priv->state = CAIF_DISCONNECTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) caif_disconnect_client(dev_net(dev), &priv->chnl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) static int chnl_net_init(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) struct chnl_net *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) priv = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) strncpy(priv->name, dev->name, sizeof(priv->name));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) INIT_LIST_HEAD(&priv->list_field);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) static void chnl_net_uninit(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) struct chnl_net *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) priv = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) list_del_init(&priv->list_field);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) static const struct net_device_ops netdev_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) .ndo_open = chnl_net_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) .ndo_stop = chnl_net_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) .ndo_init = chnl_net_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) .ndo_uninit = chnl_net_uninit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) .ndo_start_xmit = chnl_net_start_xmit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) static void chnl_net_destructor(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) struct chnl_net *priv = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) caif_free_client(&priv->chnl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) static void ipcaif_net_setup(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) struct chnl_net *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) dev->netdev_ops = &netdev_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) dev->needs_free_netdev = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) dev->priv_destructor = chnl_net_destructor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) dev->flags |= IFF_NOARP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) dev->flags |= IFF_POINTOPOINT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) dev->mtu = GPRS_PDP_MTU;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) dev->tx_queue_len = CAIF_NET_DEFAULT_QUEUE_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) priv = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) priv->chnl.receive = chnl_recv_cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) priv->chnl.ctrlcmd = chnl_flowctrl_cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) priv->netdev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) priv->conn_req.protocol = CAIFPROTO_DATAGRAM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) priv->conn_req.link_selector = CAIF_LINK_HIGH_BANDW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) priv->conn_req.priority = CAIF_PRIO_LOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) /* Insert illegal value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) priv->conn_req.sockaddr.u.dgm.connection_id = UNDEF_CONNID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) priv->flowenabled = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) init_waitqueue_head(&priv->netmgmt_wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) static int ipcaif_fill_info(struct sk_buff *skb, const struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) struct chnl_net *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) u8 loop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) priv = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) if (nla_put_u32(skb, IFLA_CAIF_IPV4_CONNID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) priv->conn_req.sockaddr.u.dgm.connection_id) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) nla_put_u32(skb, IFLA_CAIF_IPV6_CONNID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) priv->conn_req.sockaddr.u.dgm.connection_id))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) loop = priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) if (nla_put_u8(skb, IFLA_CAIF_LOOPBACK, loop))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) nla_put_failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) static void caif_netlink_parms(struct nlattr *data[],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) struct caif_connect_request *conn_req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) if (!data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) pr_warn("no params data found\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) if (data[IFLA_CAIF_IPV4_CONNID])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) conn_req->sockaddr.u.dgm.connection_id =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) nla_get_u32(data[IFLA_CAIF_IPV4_CONNID]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) if (data[IFLA_CAIF_IPV6_CONNID])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) conn_req->sockaddr.u.dgm.connection_id =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) nla_get_u32(data[IFLA_CAIF_IPV6_CONNID]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) if (data[IFLA_CAIF_LOOPBACK]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) if (nla_get_u8(data[IFLA_CAIF_LOOPBACK]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) conn_req->protocol = CAIFPROTO_DATAGRAM_LOOP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) conn_req->protocol = CAIFPROTO_DATAGRAM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) static int ipcaif_newlink(struct net *src_net, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) struct nlattr *tb[], struct nlattr *data[],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) struct chnl_net *caifdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) caifdev = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) caif_netlink_parms(data, &caifdev->conn_req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) ret = register_netdevice(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) pr_warn("device rtml registration failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) list_add(&caifdev->list_field, &chnl_net_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) /* Use ifindex as connection id, and use loopback channel default. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) if (caifdev->conn_req.sockaddr.u.dgm.connection_id == UNDEF_CONNID) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) caifdev->conn_req.sockaddr.u.dgm.connection_id = dev->ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) caifdev->conn_req.protocol = CAIFPROTO_DATAGRAM_LOOP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) static int ipcaif_changelink(struct net_device *dev, struct nlattr *tb[],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) struct nlattr *data[],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) struct chnl_net *caifdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) caifdev = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) caif_netlink_parms(data, &caifdev->conn_req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) netdev_state_change(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) static size_t ipcaif_get_size(const struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) /* IFLA_CAIF_IPV4_CONNID */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) nla_total_size(4) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) /* IFLA_CAIF_IPV6_CONNID */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) nla_total_size(4) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) /* IFLA_CAIF_LOOPBACK */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) nla_total_size(2) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) static const struct nla_policy ipcaif_policy[IFLA_CAIF_MAX + 1] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) [IFLA_CAIF_IPV4_CONNID] = { .type = NLA_U32 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) [IFLA_CAIF_IPV6_CONNID] = { .type = NLA_U32 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) [IFLA_CAIF_LOOPBACK] = { .type = NLA_U8 }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) static struct rtnl_link_ops ipcaif_link_ops __read_mostly = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) .kind = "caif",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) .priv_size = sizeof(struct chnl_net),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) .setup = ipcaif_net_setup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) .maxtype = IFLA_CAIF_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) .policy = ipcaif_policy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) .newlink = ipcaif_newlink,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) .changelink = ipcaif_changelink,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) .get_size = ipcaif_get_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) .fill_info = ipcaif_fill_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) static int __init chnl_init_module(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) return rtnl_link_register(&ipcaif_link_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) static void __exit chnl_exit_module(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) struct chnl_net *dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) struct list_head *list_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) struct list_head *_tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) rtnl_link_unregister(&ipcaif_link_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) rtnl_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) list_for_each_safe(list_node, _tmp, &chnl_net_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) dev = list_entry(list_node, struct chnl_net, list_field);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) list_del_init(list_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) delete_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) rtnl_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) module_init(chnl_init_module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) module_exit(chnl_exit_module);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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