Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) ST-Ericsson AB 2010 |
| 3 | * Authors: Sjur Brendeland/sjur.brandeland@stericsson.com |
| 4 | * Daniel Martensson / Daniel.Martensson@stericsson.com |
| 5 | * License terms: GNU General Public License (GPL) version 2 |
| 6 | */ |
| 7 | |
Joe Perches | b31fa5b | 2010-09-05 21:31:11 +0000 | [diff] [blame] | 8 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__ |
| 9 | |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 10 | #include <linux/fs.h> |
Alexey Dobriyan | a6b7a40 | 2011-06-06 10:43:46 +0000 | [diff] [blame] | 11 | #include <linux/hardirq.h> |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 12 | #include <linux/init.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/netdevice.h> |
| 15 | #include <linux/if_ether.h> |
| 16 | #include <linux/moduleparam.h> |
| 17 | #include <linux/ip.h> |
| 18 | #include <linux/sched.h> |
| 19 | #include <linux/sockios.h> |
| 20 | #include <linux/caif/if_caif.h> |
| 21 | #include <net/rtnetlink.h> |
| 22 | #include <net/caif/caif_layer.h> |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 23 | #include <net/caif/cfpkt.h> |
| 24 | #include <net/caif/caif_dev.h> |
| 25 | |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 26 | /* GPRS PDP connection has MTU to 1500 */ |
Sjur Braendeland | 2aa40ae | 2010-06-17 06:55:40 +0000 | [diff] [blame] | 27 | #define GPRS_PDP_MTU 1500 |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 28 | /* 5 sec. connect timeout */ |
| 29 | #define CONNECT_TIMEOUT (5 * HZ) |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 30 | #define CAIF_NET_DEFAULT_QUEUE_LEN 500 |
sjur.brandeland@stericsson.com | e3abcc2 | 2012-03-11 10:28:32 +0000 | [diff] [blame] | 31 | #define UNDEF_CONNID 0xffffffff |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 32 | |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 33 | /*This list is protected by the rtnl lock. */ |
| 34 | static LIST_HEAD(chnl_net_list); |
| 35 | |
| 36 | MODULE_LICENSE("GPL"); |
| 37 | MODULE_ALIAS_RTNL_LINK("caif"); |
| 38 | |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 39 | enum caif_states { |
| 40 | CAIF_CONNECTED = 1, |
| 41 | CAIF_CONNECTING, |
| 42 | CAIF_DISCONNECTED, |
| 43 | CAIF_SHUTDOWN |
| 44 | }; |
| 45 | |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 46 | struct chnl_net { |
| 47 | struct cflayer chnl; |
| 48 | struct net_device_stats stats; |
| 49 | struct caif_connect_request conn_req; |
| 50 | struct list_head list_field; |
| 51 | struct net_device *netdev; |
| 52 | char name[256]; |
| 53 | wait_queue_head_t netmgmt_wq; |
| 54 | /* Flow status to remember and control the transmission. */ |
| 55 | bool flowenabled; |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 56 | enum caif_states state; |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 57 | }; |
| 58 | |
| 59 | static void robust_list_del(struct list_head *delete_node) |
| 60 | { |
| 61 | struct list_head *list_node; |
| 62 | struct list_head *n; |
| 63 | ASSERT_RTNL(); |
| 64 | list_for_each_safe(list_node, n, &chnl_net_list) { |
| 65 | if (list_node == delete_node) { |
| 66 | list_del(list_node); |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 67 | return; |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 68 | } |
| 69 | } |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 70 | WARN_ON(1); |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 71 | } |
| 72 | |
| 73 | static int chnl_recv_cb(struct cflayer *layr, struct cfpkt *pkt) |
| 74 | { |
| 75 | struct sk_buff *skb; |
Dan Carpenter | af2ce21 | 2012-02-06 21:20:15 +0000 | [diff] [blame] | 76 | struct chnl_net *priv; |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 77 | int pktlen; |
Kumar Sanghvi | d7b92af | 2011-01-07 01:57:08 +0000 | [diff] [blame] | 78 | const u8 *ip_version; |
| 79 | u8 buf; |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 80 | |
| 81 | priv = container_of(layr, struct chnl_net, chnl); |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 82 | if (!priv) |
| 83 | return -EINVAL; |
| 84 | |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 85 | skb = (struct sk_buff *) cfpkt_tonative(pkt); |
sjur.brandeland@stericsson.com | 3f874ad | 2011-05-13 02:44:08 +0000 | [diff] [blame] | 86 | |
| 87 | /* Get length of CAIF packet. */ |
| 88 | pktlen = skb->len; |
| 89 | |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 90 | /* Pass some minimum information and |
| 91 | * send the packet to the net stack. |
| 92 | */ |
| 93 | skb->dev = priv->netdev; |
Kumar Sanghvi | d7b92af | 2011-01-07 01:57:08 +0000 | [diff] [blame] | 94 | |
| 95 | /* check the version of IP */ |
| 96 | ip_version = skb_header_pointer(skb, 0, 1, &buf); |
sjur.brandeland@stericsson.com | 576f3cc | 2012-02-03 04:36:20 +0000 | [diff] [blame] | 97 | |
Kumar Sanghvi | d7b92af | 2011-01-07 01:57:08 +0000 | [diff] [blame] | 98 | switch (*ip_version >> 4) { |
| 99 | case 4: |
| 100 | skb->protocol = htons(ETH_P_IP); |
| 101 | break; |
| 102 | case 6: |
| 103 | skb->protocol = htons(ETH_P_IPV6); |
| 104 | break; |
| 105 | default: |
sjur.brandeland@stericsson.com | 576f3cc | 2012-02-03 04:36:20 +0000 | [diff] [blame] | 106 | priv->netdev->stats.rx_errors++; |
Kumar Sanghvi | d7b92af | 2011-01-07 01:57:08 +0000 | [diff] [blame] | 107 | return -EINVAL; |
| 108 | } |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 109 | |
| 110 | /* If we change the header in loop mode, the checksum is corrupted. */ |
| 111 | if (priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP) |
| 112 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 113 | else |
| 114 | skb->ip_summed = CHECKSUM_NONE; |
| 115 | |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 116 | if (in_interrupt()) |
| 117 | netif_rx(skb); |
| 118 | else |
| 119 | netif_rx_ni(skb); |
| 120 | |
| 121 | /* Update statistics. */ |
| 122 | priv->netdev->stats.rx_packets++; |
| 123 | priv->netdev->stats.rx_bytes += pktlen; |
| 124 | |
sjur.brandeland@stericsson.com | 576f3cc | 2012-02-03 04:36:20 +0000 | [diff] [blame] | 125 | return 0; |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 126 | } |
| 127 | |
| 128 | static int delete_device(struct chnl_net *dev) |
| 129 | { |
| 130 | ASSERT_RTNL(); |
| 131 | if (dev->netdev) |
| 132 | unregister_netdevice(dev->netdev); |
| 133 | return 0; |
| 134 | } |
| 135 | |
| 136 | static void close_work(struct work_struct *work) |
| 137 | { |
| 138 | struct chnl_net *dev = NULL; |
| 139 | struct list_head *list_node; |
| 140 | struct list_head *_tmp; |
sjur.brandeland@stericsson.com | 41be5a4 | 2011-06-01 00:55:37 +0000 | [diff] [blame] | 141 | |
| 142 | rtnl_lock(); |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 143 | list_for_each_safe(list_node, _tmp, &chnl_net_list) { |
| 144 | dev = list_entry(list_node, struct chnl_net, list_field); |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 145 | if (dev->state == CAIF_SHUTDOWN) |
| 146 | dev_close(dev->netdev); |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 147 | } |
sjur.brandeland@stericsson.com | 41be5a4 | 2011-06-01 00:55:37 +0000 | [diff] [blame] | 148 | rtnl_unlock(); |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 149 | } |
| 150 | static DECLARE_WORK(close_worker, close_work); |
| 151 | |
sjur.brandeland@stericsson.com | b3ccfbe | 2011-05-13 02:44:04 +0000 | [diff] [blame] | 152 | static void chnl_hold(struct cflayer *lyr) |
| 153 | { |
| 154 | struct chnl_net *priv = container_of(lyr, struct chnl_net, chnl); |
| 155 | dev_hold(priv->netdev); |
| 156 | } |
| 157 | |
| 158 | static void chnl_put(struct cflayer *lyr) |
| 159 | { |
| 160 | struct chnl_net *priv = container_of(lyr, struct chnl_net, chnl); |
| 161 | dev_put(priv->netdev); |
| 162 | } |
| 163 | |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 164 | static void chnl_flowctrl_cb(struct cflayer *layr, enum caif_ctrlcmd flow, |
| 165 | int phyid) |
| 166 | { |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 167 | struct chnl_net *priv = container_of(layr, struct chnl_net, chnl); |
Joe Perches | b31fa5b | 2010-09-05 21:31:11 +0000 | [diff] [blame] | 168 | pr_debug("NET flowctrl func called flow: %s\n", |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 169 | flow == CAIF_CTRLCMD_FLOW_ON_IND ? "ON" : |
| 170 | flow == CAIF_CTRLCMD_INIT_RSP ? "INIT" : |
| 171 | flow == CAIF_CTRLCMD_FLOW_OFF_IND ? "OFF" : |
| 172 | flow == CAIF_CTRLCMD_DEINIT_RSP ? "CLOSE/DEINIT" : |
| 173 | flow == CAIF_CTRLCMD_INIT_FAIL_RSP ? "OPEN_FAIL" : |
| 174 | flow == CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND ? |
| 175 | "REMOTE_SHUTDOWN" : "UKNOWN CTRL COMMAND"); |
| 176 | |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 177 | |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 178 | |
| 179 | switch (flow) { |
| 180 | case CAIF_CTRLCMD_FLOW_OFF_IND: |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 181 | priv->flowenabled = false; |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 182 | netif_stop_queue(priv->netdev); |
| 183 | break; |
| 184 | case CAIF_CTRLCMD_DEINIT_RSP: |
| 185 | priv->state = CAIF_DISCONNECTED; |
| 186 | break; |
| 187 | case CAIF_CTRLCMD_INIT_FAIL_RSP: |
| 188 | priv->state = CAIF_DISCONNECTED; |
| 189 | wake_up_interruptible(&priv->netmgmt_wq); |
| 190 | break; |
| 191 | case CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND: |
| 192 | priv->state = CAIF_SHUTDOWN; |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 193 | netif_tx_disable(priv->netdev); |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 194 | schedule_work(&close_worker); |
| 195 | break; |
| 196 | case CAIF_CTRLCMD_FLOW_ON_IND: |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 197 | priv->flowenabled = true; |
| 198 | netif_wake_queue(priv->netdev); |
| 199 | break; |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 200 | case CAIF_CTRLCMD_INIT_RSP: |
sjur.brandeland@stericsson.com | b3ccfbe | 2011-05-13 02:44:04 +0000 | [diff] [blame] | 201 | caif_client_register_refcnt(&priv->chnl, chnl_hold, chnl_put); |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 202 | priv->state = CAIF_CONNECTED; |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 203 | priv->flowenabled = true; |
| 204 | netif_wake_queue(priv->netdev); |
| 205 | wake_up_interruptible(&priv->netmgmt_wq); |
| 206 | break; |
| 207 | default: |
| 208 | break; |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | static int chnl_net_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| 213 | { |
| 214 | struct chnl_net *priv; |
| 215 | struct cfpkt *pkt = NULL; |
| 216 | int len; |
| 217 | int result = -1; |
| 218 | /* Get our private data. */ |
| 219 | priv = netdev_priv(dev); |
| 220 | |
| 221 | if (skb->len > priv->netdev->mtu) { |
Joe Perches | b31fa5b | 2010-09-05 21:31:11 +0000 | [diff] [blame] | 222 | pr_warn("Size of skb exceeded MTU\n"); |
sjur.brandeland@stericsson.com | 576f3cc | 2012-02-03 04:36:20 +0000 | [diff] [blame] | 223 | dev->stats.tx_errors++; |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 224 | return -ENOSPC; |
| 225 | } |
| 226 | |
| 227 | if (!priv->flowenabled) { |
Joe Perches | b31fa5b | 2010-09-05 21:31:11 +0000 | [diff] [blame] | 228 | pr_debug("dropping packets flow off\n"); |
sjur.brandeland@stericsson.com | 576f3cc | 2012-02-03 04:36:20 +0000 | [diff] [blame] | 229 | dev->stats.tx_dropped++; |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 230 | return NETDEV_TX_BUSY; |
| 231 | } |
| 232 | |
| 233 | if (priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP) |
| 234 | swap(ip_hdr(skb)->saddr, ip_hdr(skb)->daddr); |
| 235 | |
| 236 | /* Store original SKB length. */ |
| 237 | len = skb->len; |
| 238 | |
| 239 | pkt = cfpkt_fromnative(CAIF_DIR_OUT, (void *) skb); |
| 240 | |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 241 | /* Send the packet down the stack. */ |
| 242 | result = priv->chnl.dn->transmit(priv->chnl.dn, pkt); |
| 243 | if (result) { |
sjur.brandeland@stericsson.com | 576f3cc | 2012-02-03 04:36:20 +0000 | [diff] [blame] | 244 | dev->stats.tx_dropped++; |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 245 | return result; |
| 246 | } |
| 247 | |
| 248 | /* Update statistics. */ |
| 249 | dev->stats.tx_packets++; |
| 250 | dev->stats.tx_bytes += len; |
| 251 | |
| 252 | return NETDEV_TX_OK; |
| 253 | } |
| 254 | |
| 255 | static int chnl_net_open(struct net_device *dev) |
| 256 | { |
| 257 | struct chnl_net *priv = NULL; |
| 258 | int result = -1; |
Sjur Braendeland | 2aa40ae | 2010-06-17 06:55:40 +0000 | [diff] [blame] | 259 | int llifindex, headroom, tailroom, mtu; |
| 260 | struct net_device *lldev; |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 261 | ASSERT_RTNL(); |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 262 | priv = netdev_priv(dev); |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 263 | if (!priv) { |
Joe Perches | b31fa5b | 2010-09-05 21:31:11 +0000 | [diff] [blame] | 264 | pr_debug("chnl_net_open: no priv\n"); |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 265 | return -ENODEV; |
| 266 | } |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 267 | |
| 268 | if (priv->state != CAIF_CONNECTING) { |
| 269 | priv->state = CAIF_CONNECTING; |
sjur.brandeland@stericsson.com | bee925d | 2011-05-13 02:44:05 +0000 | [diff] [blame] | 270 | result = caif_connect_client(dev_net(dev), &priv->conn_req, |
| 271 | &priv->chnl, &llifindex, |
| 272 | &headroom, &tailroom); |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 273 | if (result != 0) { |
Joe Perches | b31fa5b | 2010-09-05 21:31:11 +0000 | [diff] [blame] | 274 | pr_debug("err: " |
| 275 | "Unable to register and open device," |
| 276 | " Err:%d\n", |
| 277 | result); |
Sjur Braendeland | 2aa40ae | 2010-06-17 06:55:40 +0000 | [diff] [blame] | 278 | goto error; |
| 279 | } |
| 280 | |
| 281 | lldev = dev_get_by_index(dev_net(dev), llifindex); |
| 282 | |
| 283 | if (lldev == NULL) { |
Joe Perches | b31fa5b | 2010-09-05 21:31:11 +0000 | [diff] [blame] | 284 | pr_debug("no interface?\n"); |
Sjur Braendeland | 2aa40ae | 2010-06-17 06:55:40 +0000 | [diff] [blame] | 285 | result = -ENODEV; |
| 286 | goto error; |
| 287 | } |
| 288 | |
| 289 | dev->needed_tailroom = tailroom + lldev->needed_tailroom; |
| 290 | dev->hard_header_len = headroom + lldev->hard_header_len + |
| 291 | lldev->needed_tailroom; |
| 292 | |
| 293 | /* |
| 294 | * MTU, head-room etc is not know before we have a |
| 295 | * CAIF link layer device available. MTU calculation may |
| 296 | * override initial RTNL configuration. |
| 297 | * MTU is minimum of current mtu, link layer mtu pluss |
| 298 | * CAIF head and tail, and PDP GPRS contexts max MTU. |
| 299 | */ |
| 300 | mtu = min_t(int, dev->mtu, lldev->mtu - (headroom + tailroom)); |
| 301 | mtu = min_t(int, GPRS_PDP_MTU, mtu); |
| 302 | dev_set_mtu(dev, mtu); |
| 303 | dev_put(lldev); |
| 304 | |
| 305 | if (mtu < 100) { |
Joe Perches | b31fa5b | 2010-09-05 21:31:11 +0000 | [diff] [blame] | 306 | pr_warn("CAIF Interface MTU too small (%d)\n", mtu); |
Sjur Braendeland | 2aa40ae | 2010-06-17 06:55:40 +0000 | [diff] [blame] | 307 | result = -ENODEV; |
| 308 | goto error; |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 309 | } |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 310 | } |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 311 | |
Sjur Braendeland | 2aa40ae | 2010-06-17 06:55:40 +0000 | [diff] [blame] | 312 | rtnl_unlock(); /* Release RTNL lock during connect wait */ |
| 313 | |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 314 | result = wait_event_interruptible_timeout(priv->netmgmt_wq, |
| 315 | priv->state != CAIF_CONNECTING, |
| 316 | CONNECT_TIMEOUT); |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 317 | |
Sjur Braendeland | 2aa40ae | 2010-06-17 06:55:40 +0000 | [diff] [blame] | 318 | rtnl_lock(); |
| 319 | |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 320 | if (result == -ERESTARTSYS) { |
Joe Perches | b31fa5b | 2010-09-05 21:31:11 +0000 | [diff] [blame] | 321 | pr_debug("wait_event_interruptible woken by a signal\n"); |
Sjur Braendeland | 2aa40ae | 2010-06-17 06:55:40 +0000 | [diff] [blame] | 322 | result = -ERESTARTSYS; |
| 323 | goto error; |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 324 | } |
Sjur Braendeland | 2aa40ae | 2010-06-17 06:55:40 +0000 | [diff] [blame] | 325 | |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 326 | if (result == 0) { |
Joe Perches | b31fa5b | 2010-09-05 21:31:11 +0000 | [diff] [blame] | 327 | pr_debug("connect timeout\n"); |
sjur.brandeland@stericsson.com | bee925d | 2011-05-13 02:44:05 +0000 | [diff] [blame] | 328 | caif_disconnect_client(dev_net(dev), &priv->chnl); |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 329 | priv->state = CAIF_DISCONNECTED; |
Joe Perches | b31fa5b | 2010-09-05 21:31:11 +0000 | [diff] [blame] | 330 | pr_debug("state disconnected\n"); |
Sjur Braendeland | 2aa40ae | 2010-06-17 06:55:40 +0000 | [diff] [blame] | 331 | result = -ETIMEDOUT; |
| 332 | goto error; |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 333 | } |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 334 | |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 335 | if (priv->state != CAIF_CONNECTED) { |
Joe Perches | b31fa5b | 2010-09-05 21:31:11 +0000 | [diff] [blame] | 336 | pr_debug("connect failed\n"); |
Sjur Braendeland | 2aa40ae | 2010-06-17 06:55:40 +0000 | [diff] [blame] | 337 | result = -ECONNREFUSED; |
| 338 | goto error; |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 339 | } |
Joe Perches | b31fa5b | 2010-09-05 21:31:11 +0000 | [diff] [blame] | 340 | pr_debug("CAIF Netdevice connected\n"); |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 341 | return 0; |
Sjur Braendeland | 2aa40ae | 2010-06-17 06:55:40 +0000 | [diff] [blame] | 342 | |
| 343 | error: |
sjur.brandeland@stericsson.com | bee925d | 2011-05-13 02:44:05 +0000 | [diff] [blame] | 344 | caif_disconnect_client(dev_net(dev), &priv->chnl); |
Sjur Braendeland | 2aa40ae | 2010-06-17 06:55:40 +0000 | [diff] [blame] | 345 | priv->state = CAIF_DISCONNECTED; |
Joe Perches | b31fa5b | 2010-09-05 21:31:11 +0000 | [diff] [blame] | 346 | pr_debug("state disconnected\n"); |
Sjur Braendeland | 2aa40ae | 2010-06-17 06:55:40 +0000 | [diff] [blame] | 347 | return result; |
| 348 | |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 349 | } |
| 350 | |
| 351 | static int chnl_net_stop(struct net_device *dev) |
| 352 | { |
| 353 | struct chnl_net *priv; |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 354 | |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 355 | ASSERT_RTNL(); |
| 356 | priv = netdev_priv(dev); |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 357 | priv->state = CAIF_DISCONNECTED; |
sjur.brandeland@stericsson.com | bee925d | 2011-05-13 02:44:05 +0000 | [diff] [blame] | 358 | caif_disconnect_client(dev_net(dev), &priv->chnl); |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 359 | return 0; |
| 360 | } |
| 361 | |
| 362 | static int chnl_net_init(struct net_device *dev) |
| 363 | { |
| 364 | struct chnl_net *priv; |
| 365 | ASSERT_RTNL(); |
| 366 | priv = netdev_priv(dev); |
| 367 | strncpy(priv->name, dev->name, sizeof(priv->name)); |
| 368 | return 0; |
| 369 | } |
| 370 | |
| 371 | static void chnl_net_uninit(struct net_device *dev) |
| 372 | { |
| 373 | struct chnl_net *priv; |
| 374 | ASSERT_RTNL(); |
| 375 | priv = netdev_priv(dev); |
| 376 | robust_list_del(&priv->list_field); |
| 377 | } |
| 378 | |
| 379 | static const struct net_device_ops netdev_ops = { |
| 380 | .ndo_open = chnl_net_open, |
| 381 | .ndo_stop = chnl_net_stop, |
| 382 | .ndo_init = chnl_net_init, |
| 383 | .ndo_uninit = chnl_net_uninit, |
| 384 | .ndo_start_xmit = chnl_net_start_xmit, |
| 385 | }; |
| 386 | |
sjur.brandeland@stericsson.com | b3ccfbe | 2011-05-13 02:44:04 +0000 | [diff] [blame] | 387 | static void chnl_net_destructor(struct net_device *dev) |
| 388 | { |
| 389 | struct chnl_net *priv = netdev_priv(dev); |
| 390 | caif_free_client(&priv->chnl); |
| 391 | free_netdev(dev); |
| 392 | } |
| 393 | |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 394 | static void ipcaif_net_setup(struct net_device *dev) |
| 395 | { |
| 396 | struct chnl_net *priv; |
| 397 | dev->netdev_ops = &netdev_ops; |
sjur.brandeland@stericsson.com | b3ccfbe | 2011-05-13 02:44:04 +0000 | [diff] [blame] | 398 | dev->destructor = chnl_net_destructor; |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 399 | dev->flags |= IFF_NOARP; |
| 400 | dev->flags |= IFF_POINTOPOINT; |
Sjur Braendeland | 2aa40ae | 2010-06-17 06:55:40 +0000 | [diff] [blame] | 401 | dev->mtu = GPRS_PDP_MTU; |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 402 | dev->tx_queue_len = CAIF_NET_DEFAULT_QUEUE_LEN; |
| 403 | |
| 404 | priv = netdev_priv(dev); |
| 405 | priv->chnl.receive = chnl_recv_cb; |
| 406 | priv->chnl.ctrlcmd = chnl_flowctrl_cb; |
| 407 | priv->netdev = dev; |
| 408 | priv->conn_req.protocol = CAIFPROTO_DATAGRAM; |
| 409 | priv->conn_req.link_selector = CAIF_LINK_HIGH_BANDW; |
| 410 | priv->conn_req.priority = CAIF_PRIO_LOW; |
| 411 | /* Insert illegal value */ |
sjur.brandeland@stericsson.com | e3abcc2 | 2012-03-11 10:28:32 +0000 | [diff] [blame] | 412 | priv->conn_req.sockaddr.u.dgm.connection_id = UNDEF_CONNID; |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 413 | priv->flowenabled = false; |
| 414 | |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 415 | init_waitqueue_head(&priv->netmgmt_wq); |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 416 | } |
| 417 | |
| 418 | |
| 419 | static int ipcaif_fill_info(struct sk_buff *skb, const struct net_device *dev) |
| 420 | { |
| 421 | struct chnl_net *priv; |
| 422 | u8 loop; |
| 423 | priv = netdev_priv(dev); |
| 424 | NLA_PUT_U32(skb, IFLA_CAIF_IPV4_CONNID, |
| 425 | priv->conn_req.sockaddr.u.dgm.connection_id); |
| 426 | NLA_PUT_U32(skb, IFLA_CAIF_IPV6_CONNID, |
| 427 | priv->conn_req.sockaddr.u.dgm.connection_id); |
| 428 | loop = priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP; |
| 429 | NLA_PUT_U8(skb, IFLA_CAIF_LOOPBACK, loop); |
| 430 | |
| 431 | |
| 432 | return 0; |
| 433 | nla_put_failure: |
| 434 | return -EMSGSIZE; |
| 435 | |
| 436 | } |
| 437 | |
| 438 | static void caif_netlink_parms(struct nlattr *data[], |
| 439 | struct caif_connect_request *conn_req) |
| 440 | { |
| 441 | if (!data) { |
Joe Perches | b31fa5b | 2010-09-05 21:31:11 +0000 | [diff] [blame] | 442 | pr_warn("no params data found\n"); |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 443 | return; |
| 444 | } |
| 445 | if (data[IFLA_CAIF_IPV4_CONNID]) |
| 446 | conn_req->sockaddr.u.dgm.connection_id = |
| 447 | nla_get_u32(data[IFLA_CAIF_IPV4_CONNID]); |
| 448 | if (data[IFLA_CAIF_IPV6_CONNID]) |
| 449 | conn_req->sockaddr.u.dgm.connection_id = |
| 450 | nla_get_u32(data[IFLA_CAIF_IPV6_CONNID]); |
| 451 | if (data[IFLA_CAIF_LOOPBACK]) { |
| 452 | if (nla_get_u8(data[IFLA_CAIF_LOOPBACK])) |
| 453 | conn_req->protocol = CAIFPROTO_DATAGRAM_LOOP; |
| 454 | else |
| 455 | conn_req->protocol = CAIFPROTO_DATAGRAM; |
| 456 | } |
| 457 | } |
| 458 | |
| 459 | static int ipcaif_newlink(struct net *src_net, struct net_device *dev, |
| 460 | struct nlattr *tb[], struct nlattr *data[]) |
| 461 | { |
| 462 | int ret; |
| 463 | struct chnl_net *caifdev; |
| 464 | ASSERT_RTNL(); |
| 465 | caifdev = netdev_priv(dev); |
| 466 | caif_netlink_parms(data, &caifdev->conn_req); |
Sjur Braendeland | 8391c4a | 2010-04-28 08:54:39 +0000 | [diff] [blame] | 467 | dev_net_set(caifdev->netdev, src_net); |
| 468 | |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 469 | ret = register_netdevice(dev); |
| 470 | if (ret) |
Joe Perches | b31fa5b | 2010-09-05 21:31:11 +0000 | [diff] [blame] | 471 | pr_warn("device rtml registration failed\n"); |
David S. Miller | b2df5a84 | 2011-02-08 14:31:31 -0800 | [diff] [blame] | 472 | else |
| 473 | list_add(&caifdev->list_field, &chnl_net_list); |
sjur.brandeland@stericsson.com | b3ccfbe | 2011-05-13 02:44:04 +0000 | [diff] [blame] | 474 | |
sjur.brandeland@stericsson.com | e3abcc2 | 2012-03-11 10:28:32 +0000 | [diff] [blame] | 475 | /* Use ifindex as connection id, and use loopback channel default. */ |
| 476 | if (caifdev->conn_req.sockaddr.u.dgm.connection_id == UNDEF_CONNID) { |
sjur.brandeland@stericsson.com | b3ccfbe | 2011-05-13 02:44:04 +0000 | [diff] [blame] | 477 | caifdev->conn_req.sockaddr.u.dgm.connection_id = dev->ifindex; |
sjur.brandeland@stericsson.com | e3abcc2 | 2012-03-11 10:28:32 +0000 | [diff] [blame] | 478 | caifdev->conn_req.protocol = CAIFPROTO_DATAGRAM_LOOP; |
| 479 | } |
Sjur Braendeland | cc36a07 | 2010-03-30 13:56:27 +0000 | [diff] [blame] | 480 | return ret; |
| 481 | } |
| 482 | |
| 483 | static int ipcaif_changelink(struct net_device *dev, struct nlattr *tb[], |
| 484 | struct nlattr *data[]) |
| 485 | { |
| 486 | struct chnl_net *caifdev; |
| 487 | ASSERT_RTNL(); |
| 488 | caifdev = netdev_priv(dev); |
| 489 | caif_netlink_parms(data, &caifdev->conn_req); |
| 490 | netdev_state_change(dev); |
| 491 | return 0; |
| 492 | } |
| 493 | |
| 494 | static size_t ipcaif_get_size(const struct net_device *dev) |
| 495 | { |
| 496 | return |
| 497 | /* IFLA_CAIF_IPV4_CONNID */ |
| 498 | nla_total_size(4) + |
| 499 | /* IFLA_CAIF_IPV6_CONNID */ |
| 500 | nla_total_size(4) + |
| 501 | /* IFLA_CAIF_LOOPBACK */ |
| 502 | nla_total_size(2) + |
| 503 | 0; |
| 504 | } |
| 505 | |
| 506 | static const struct nla_policy ipcaif_policy[IFLA_CAIF_MAX + 1] = { |
| 507 | [IFLA_CAIF_IPV4_CONNID] = { .type = NLA_U32 }, |
| 508 | [IFLA_CAIF_IPV6_CONNID] = { .type = NLA_U32 }, |
| 509 | [IFLA_CAIF_LOOPBACK] = { .type = NLA_U8 } |
| 510 | }; |
| 511 | |
| 512 | |
| 513 | static struct rtnl_link_ops ipcaif_link_ops __read_mostly = { |
| 514 | .kind = "caif", |
| 515 | .priv_size = sizeof(struct chnl_net), |
| 516 | .setup = ipcaif_net_setup, |
| 517 | .maxtype = IFLA_CAIF_MAX, |
| 518 | .policy = ipcaif_policy, |
| 519 | .newlink = ipcaif_newlink, |
| 520 | .changelink = ipcaif_changelink, |
| 521 | .get_size = ipcaif_get_size, |
| 522 | .fill_info = ipcaif_fill_info, |
| 523 | |
| 524 | }; |
| 525 | |
| 526 | static int __init chnl_init_module(void) |
| 527 | { |
| 528 | return rtnl_link_register(&ipcaif_link_ops); |
| 529 | } |
| 530 | |
| 531 | static void __exit chnl_exit_module(void) |
| 532 | { |
| 533 | struct chnl_net *dev = NULL; |
| 534 | struct list_head *list_node; |
| 535 | struct list_head *_tmp; |
| 536 | rtnl_link_unregister(&ipcaif_link_ops); |
| 537 | rtnl_lock(); |
| 538 | list_for_each_safe(list_node, _tmp, &chnl_net_list) { |
| 539 | dev = list_entry(list_node, struct chnl_net, list_field); |
| 540 | list_del(list_node); |
| 541 | delete_device(dev); |
| 542 | } |
| 543 | rtnl_unlock(); |
| 544 | } |
| 545 | |
| 546 | module_init(chnl_init_module); |
| 547 | module_exit(chnl_exit_module); |