| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) |
| * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and |
| * James Leu (jleu@mindspring.net). |
| * Copyright (C) 2001 by various other people who didn't put their name here. |
| */ |
| |
| #include <linux/memblock.h> |
| #include <linux/etherdevice.h> |
| #include <linux/ethtool.h> |
| #include <linux/inetdevice.h> |
| #include <linux/init.h> |
| #include <linux/list.h> |
| #include <linux/netdevice.h> |
| #include <linux/platform_device.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/skbuff.h> |
| #include <linux/slab.h> |
| #include <linux/spinlock.h> |
| #include <init.h> |
| #include <irq_kern.h> |
| #include <irq_user.h> |
| #include "mconsole_kern.h" |
| #include <net_kern.h> |
| #include <net_user.h> |
| |
| #define DRIVER_NAME "uml-netdev" |
| |
| static DEFINE_SPINLOCK(opened_lock); |
| static LIST_HEAD(opened); |
| |
| /* |
| * The drop_skb is used when we can't allocate an skb. The |
| * packet is read into drop_skb in order to get the data off the |
| * connection to the host. |
| * It is reallocated whenever a maximum packet size is seen which is |
| * larger than any seen before. update_drop_skb is called from |
| * eth_configure when a new interface is added. |
| */ |
| static DEFINE_SPINLOCK(drop_lock); |
| static struct sk_buff *drop_skb; |
| static int drop_max; |
| |
| static int update_drop_skb(int max) |
| { |
| struct sk_buff *new; |
| unsigned long flags; |
| int err = 0; |
| |
| spin_lock_irqsave(&drop_lock, flags); |
| |
| if (max <= drop_max) |
| goto out; |
| |
| err = -ENOMEM; |
| new = dev_alloc_skb(max); |
| if (new == NULL) |
| goto out; |
| |
| skb_put(new, max); |
| |
| kfree_skb(drop_skb); |
| drop_skb = new; |
| drop_max = max; |
| err = 0; |
| out: |
| spin_unlock_irqrestore(&drop_lock, flags); |
| |
| return err; |
| } |
| |
| static int uml_net_rx(struct net_device *dev) |
| { |
| struct uml_net_private *lp = netdev_priv(dev); |
| int pkt_len; |
| struct sk_buff *skb; |
| |
| /* If we can't allocate memory, try again next round. */ |
| skb = dev_alloc_skb(lp->max_packet); |
| if (skb == NULL) { |
| drop_skb->dev = dev; |
| /* Read a packet into drop_skb and don't do anything with it. */ |
| (*lp->read)(lp->fd, drop_skb, lp); |
| dev->stats.rx_dropped++; |
| return 0; |
| } |
| |
| skb->dev = dev; |
| skb_put(skb, lp->max_packet); |
| skb_reset_mac_header(skb); |
| pkt_len = (*lp->read)(lp->fd, skb, lp); |
| |
| if (pkt_len > 0) { |
| skb_trim(skb, pkt_len); |
| skb->protocol = (*lp->protocol)(skb); |
| |
| dev->stats.rx_bytes += skb->len; |
| dev->stats.rx_packets++; |
| netif_rx(skb); |
| return pkt_len; |
| } |
| |
| kfree_skb(skb); |
| return pkt_len; |
| } |
| |
| static void uml_dev_close(struct work_struct *work) |
| { |
| struct uml_net_private *lp = |
| container_of(work, struct uml_net_private, work); |
| dev_close(lp->dev); |
| } |
| |
| static irqreturn_t uml_net_interrupt(int irq, void *dev_id) |
| { |
| struct net_device *dev = dev_id; |
| struct uml_net_private *lp = netdev_priv(dev); |
| int err; |
| |
| if (!netif_running(dev)) |
| return IRQ_NONE; |
| |
| spin_lock(&lp->lock); |
| while ((err = uml_net_rx(dev)) > 0) ; |
| if (err < 0) { |
| printk(KERN_ERR |
| "Device '%s' read returned %d, shutting it down\n", |
| dev->name, err); |
| /* dev_close can't be called in interrupt context, and takes |
| * again lp->lock. |
| * And dev_close() can be safely called multiple times on the |
| * same device, since it tests for (dev->flags & IFF_UP). So |
| * there's no harm in delaying the device shutdown. |
| * Furthermore, the workqueue will not re-enqueue an already |
| * enqueued work item. */ |
| schedule_work(&lp->work); |
| goto out; |
| } |
| out: |
| spin_unlock(&lp->lock); |
| return IRQ_HANDLED; |
| } |
| |
| static int uml_net_open(struct net_device *dev) |
| { |
| struct uml_net_private *lp = netdev_priv(dev); |
| int err; |
| |
| if (lp->fd >= 0) { |
| err = -ENXIO; |
| goto out; |
| } |
| |
| lp->fd = (*lp->open)(&lp->user); |
| if (lp->fd < 0) { |
| err = lp->fd; |
| goto out; |
| } |
| |
| err = um_request_irq(dev->irq, lp->fd, IRQ_READ, uml_net_interrupt, |
| IRQF_SHARED, dev->name, dev); |
| if (err != 0) { |
| printk(KERN_ERR "uml_net_open: failed to get irq(%d)\n", err); |
| err = -ENETUNREACH; |
| goto out_close; |
| } |
| |
| netif_start_queue(dev); |
| |
| /* clear buffer - it can happen that the host side of the interface |
| * is full when we get here. In this case, new data is never queued, |
| * SIGIOs never arrive, and the net never works. |
| */ |
| while ((err = uml_net_rx(dev)) > 0) ; |
| |
| spin_lock(&opened_lock); |
| list_add(&lp->list, &opened); |
| spin_unlock(&opened_lock); |
| |
| return 0; |
| out_close: |
| if (lp->close != NULL) (*lp->close)(lp->fd, &lp->user); |
| lp->fd = -1; |
| out: |
| return err; |
| } |
| |
| static int uml_net_close(struct net_device *dev) |
| { |
| struct uml_net_private *lp = netdev_priv(dev); |
| |
| netif_stop_queue(dev); |
| |
| um_free_irq(dev->irq, dev); |
| if (lp->close != NULL) |
| (*lp->close)(lp->fd, &lp->user); |
| lp->fd = -1; |
| |
| spin_lock(&opened_lock); |
| list_del(&lp->list); |
| spin_unlock(&opened_lock); |
| |
| return 0; |
| } |
| |
| static int uml_net_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct uml_net_private *lp = netdev_priv(dev); |
| unsigned long flags; |
| int len; |
| |
| netif_stop_queue(dev); |
| |
| spin_lock_irqsave(&lp->lock, flags); |
| |
| len = (*lp->write)(lp->fd, skb, lp); |
| skb_tx_timestamp(skb); |
| |
| if (len == skb->len) { |
| dev->stats.tx_packets++; |
| dev->stats.tx_bytes += skb->len; |
| netif_trans_update(dev); |
| netif_start_queue(dev); |
| |
| /* this is normally done in the interrupt when tx finishes */ |
| netif_wake_queue(dev); |
| } |
| else if (len == 0) { |
| netif_start_queue(dev); |
| dev->stats.tx_dropped++; |
| } |
| else { |
| netif_start_queue(dev); |
| printk(KERN_ERR "uml_net_start_xmit: failed(%d)\n", len); |
| } |
| |
| spin_unlock_irqrestore(&lp->lock, flags); |
| |
| dev_consume_skb_any(skb); |
| |
| return NETDEV_TX_OK; |
| } |
| |
| static void uml_net_set_multicast_list(struct net_device *dev) |
| { |
| return; |
| } |
| |
| static void uml_net_tx_timeout(struct net_device *dev, unsigned int txqueue) |
| { |
| netif_trans_update(dev); |
| netif_wake_queue(dev); |
| } |
| |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| static void uml_net_poll_controller(struct net_device *dev) |
| { |
| disable_irq(dev->irq); |
| uml_net_interrupt(dev->irq, dev); |
| enable_irq(dev->irq); |
| } |
| #endif |
| |
| static void uml_net_get_drvinfo(struct net_device *dev, |
| struct ethtool_drvinfo *info) |
| { |
| strlcpy(info->driver, DRIVER_NAME, sizeof(info->driver)); |
| strlcpy(info->version, "42", sizeof(info->version)); |
| } |
| |
| static const struct ethtool_ops uml_net_ethtool_ops = { |
| .get_drvinfo = uml_net_get_drvinfo, |
| .get_link = ethtool_op_get_link, |
| .get_ts_info = ethtool_op_get_ts_info, |
| }; |
| |
| static void uml_net_user_timer_expire(struct timer_list *t) |
| { |
| #ifdef undef |
| struct uml_net_private *lp = from_timer(lp, t, tl); |
| struct connection *conn = &lp->user; |
| |
| dprintk(KERN_INFO "uml_net_user_timer_expire [%p]\n", conn); |
| do_connect(conn); |
| #endif |
| } |
| |
| void uml_net_setup_etheraddr(struct net_device *dev, char *str) |
| { |
| unsigned char *addr = dev->dev_addr; |
| char *end; |
| int i; |
| |
| if (str == NULL) |
| goto random; |
| |
| for (i = 0; i < 6; i++) { |
| addr[i] = simple_strtoul(str, &end, 16); |
| if ((end == str) || |
| ((*end != ':') && (*end != ',') && (*end != '\0'))) { |
| printk(KERN_ERR |
| "setup_etheraddr: failed to parse '%s' " |
| "as an ethernet address\n", str); |
| goto random; |
| } |
| str = end + 1; |
| } |
| if (is_multicast_ether_addr(addr)) { |
| printk(KERN_ERR |
| "Attempt to assign a multicast ethernet address to a " |
| "device disallowed\n"); |
| goto random; |
| } |
| if (!is_valid_ether_addr(addr)) { |
| printk(KERN_ERR |
| "Attempt to assign an invalid ethernet address to a " |
| "device disallowed\n"); |
| goto random; |
| } |
| if (!is_local_ether_addr(addr)) { |
| printk(KERN_WARNING |
| "Warning: Assigning a globally valid ethernet " |
| "address to a device\n"); |
| printk(KERN_WARNING "You should set the 2nd rightmost bit in " |
| "the first byte of the MAC,\n"); |
| printk(KERN_WARNING "i.e. %02x:%02x:%02x:%02x:%02x:%02x\n", |
| addr[0] | 0x02, addr[1], addr[2], addr[3], addr[4], |
| addr[5]); |
| } |
| return; |
| |
| random: |
| printk(KERN_INFO |
| "Choosing a random ethernet address for device %s\n", dev->name); |
| eth_hw_addr_random(dev); |
| } |
| |
| static DEFINE_SPINLOCK(devices_lock); |
| static LIST_HEAD(devices); |
| |
| static struct platform_driver uml_net_driver = { |
| .driver = { |
| .name = DRIVER_NAME, |
| }, |
| }; |
| |
| static void net_device_release(struct device *dev) |
| { |
| struct uml_net *device = dev_get_drvdata(dev); |
| struct net_device *netdev = device->dev; |
| struct uml_net_private *lp = netdev_priv(netdev); |
| |
| if (lp->remove != NULL) |
| (*lp->remove)(&lp->user); |
| list_del(&device->list); |
| kfree(device); |
| free_netdev(netdev); |
| } |
| |
| static const struct net_device_ops uml_netdev_ops = { |
| .ndo_open = uml_net_open, |
| .ndo_stop = uml_net_close, |
| .ndo_start_xmit = uml_net_start_xmit, |
| .ndo_set_rx_mode = uml_net_set_multicast_list, |
| .ndo_tx_timeout = uml_net_tx_timeout, |
| .ndo_set_mac_address = eth_mac_addr, |
| .ndo_validate_addr = eth_validate_addr, |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| .ndo_poll_controller = uml_net_poll_controller, |
| #endif |
| }; |
| |
| /* |
| * Ensures that platform_driver_register is called only once by |
| * eth_configure. Will be set in an initcall. |
| */ |
| static int driver_registered; |
| |
| static void eth_configure(int n, void *init, char *mac, |
| struct transport *transport, gfp_t gfp_mask) |
| { |
| struct uml_net *device; |
| struct net_device *dev; |
| struct uml_net_private *lp; |
| int err, size; |
| |
| size = transport->private_size + sizeof(struct uml_net_private); |
| |
| device = kzalloc(sizeof(*device), gfp_mask); |
| if (device == NULL) { |
| printk(KERN_ERR "eth_configure failed to allocate struct " |
| "uml_net\n"); |
| return; |
| } |
| |
| dev = alloc_etherdev(size); |
| if (dev == NULL) { |
| printk(KERN_ERR "eth_configure: failed to allocate struct " |
| "net_device for eth%d\n", n); |
| goto out_free_device; |
| } |
| |
| INIT_LIST_HEAD(&device->list); |
| device->index = n; |
| |
| /* If this name ends up conflicting with an existing registered |
| * netdevice, that is OK, register_netdev{,ice}() will notice this |
| * and fail. |
| */ |
| snprintf(dev->name, sizeof(dev->name), "eth%d", n); |
| |
| uml_net_setup_etheraddr(dev, mac); |
| |
| printk(KERN_INFO "Netdevice %d (%pM) : ", n, dev->dev_addr); |
| |
| lp = netdev_priv(dev); |
| /* This points to the transport private data. It's still clear, but we |
| * must memset it to 0 *now*. Let's help the drivers. */ |
| memset(lp, 0, size); |
| INIT_WORK(&lp->work, uml_dev_close); |
| |
| /* sysfs register */ |
| if (!driver_registered) { |
| platform_driver_register(¨_net_driver); |
| driver_registered = 1; |
| } |
| device->pdev.id = n; |
| device->pdev.name = DRIVER_NAME; |
| device->pdev.dev.release = net_device_release; |
| dev_set_drvdata(&device->pdev.dev, device); |
| if (platform_device_register(&device->pdev)) |
| goto out_free_netdev; |
| SET_NETDEV_DEV(dev,&device->pdev.dev); |
| |
| device->dev = dev; |
| |
| /* |
| * These just fill in a data structure, so there's no failure |
| * to be worried about. |
| */ |
| (*transport->kern->init)(dev, init); |
| |
| *lp = ((struct uml_net_private) |
| { .list = LIST_HEAD_INIT(lp->list), |
| .dev = dev, |
| .fd = -1, |
| .mac = { 0xfe, 0xfd, 0x0, 0x0, 0x0, 0x0}, |
| .max_packet = transport->user->max_packet, |
| .protocol = transport->kern->protocol, |
| .open = transport->user->open, |
| .close = transport->user->close, |
| .remove = transport->user->remove, |
| .read = transport->kern->read, |
| .write = transport->kern->write, |
| .add_address = transport->user->add_address, |
| .delete_address = transport->user->delete_address }); |
| |
| timer_setup(&lp->tl, uml_net_user_timer_expire, 0); |
| spin_lock_init(&lp->lock); |
| memcpy(lp->mac, dev->dev_addr, sizeof(lp->mac)); |
| |
| if ((transport->user->init != NULL) && |
| ((*transport->user->init)(&lp->user, dev) != 0)) |
| goto out_unregister; |
| |
| dev->mtu = transport->user->mtu; |
| dev->netdev_ops = ¨_netdev_ops; |
| dev->ethtool_ops = ¨_net_ethtool_ops; |
| dev->watchdog_timeo = (HZ >> 1); |
| dev->irq = UM_ETH_IRQ; |
| |
| err = update_drop_skb(lp->max_packet); |
| if (err) |
| goto out_undo_user_init; |
| |
| rtnl_lock(); |
| err = register_netdevice(dev); |
| rtnl_unlock(); |
| if (err) |
| goto out_undo_user_init; |
| |
| spin_lock(&devices_lock); |
| list_add(&device->list, &devices); |
| spin_unlock(&devices_lock); |
| |
| return; |
| |
| out_undo_user_init: |
| if (transport->user->remove != NULL) |
| (*transport->user->remove)(&lp->user); |
| out_unregister: |
| platform_device_unregister(&device->pdev); |
| return; /* platform_device_unregister frees dev and device */ |
| out_free_netdev: |
| free_netdev(dev); |
| out_free_device: |
| kfree(device); |
| } |
| |
| static struct uml_net *find_device(int n) |
| { |
| struct uml_net *device; |
| struct list_head *ele; |
| |
| spin_lock(&devices_lock); |
| list_for_each(ele, &devices) { |
| device = list_entry(ele, struct uml_net, list); |
| if (device->index == n) |
| goto out; |
| } |
| device = NULL; |
| out: |
| spin_unlock(&devices_lock); |
| return device; |
| } |
| |
| static int eth_parse(char *str, int *index_out, char **str_out, |
| char **error_out) |
| { |
| char *end; |
| int n, err = -EINVAL; |
| |
| n = simple_strtoul(str, &end, 0); |
| if (end == str) { |
| *error_out = "Bad device number"; |
| return err; |
| } |
| |
| str = end; |
| if (*str != '=') { |
| *error_out = "Expected '=' after device number"; |
| return err; |
| } |
| |
| str++; |
| if (find_device(n)) { |
| *error_out = "Device already configured"; |
| return err; |
| } |
| |
| *index_out = n; |
| *str_out = str; |
| return 0; |
| } |
| |
| struct eth_init { |
| struct list_head list; |
| char *init; |
| int index; |
| }; |
| |
| static DEFINE_SPINLOCK(transports_lock); |
| static LIST_HEAD(transports); |
| |
| /* Filled in during early boot */ |
| static LIST_HEAD(eth_cmd_line); |
| |
| static int check_transport(struct transport *transport, char *eth, int n, |
| void **init_out, char **mac_out, gfp_t gfp_mask) |
| { |
| int len; |
| |
| len = strlen(transport->name); |
| if (strncmp(eth, transport->name, len)) |
| return 0; |
| |
| eth += len; |
| if (*eth == ',') |
| eth++; |
| else if (*eth != '\0') |
| return 0; |
| |
| *init_out = kmalloc(transport->setup_size, gfp_mask); |
| if (*init_out == NULL) |
| return 1; |
| |
| if (!transport->setup(eth, mac_out, *init_out)) { |
| kfree(*init_out); |
| *init_out = NULL; |
| } |
| return 1; |
| } |
| |
| void register_transport(struct transport *new) |
| { |
| struct list_head *ele, *next; |
| struct eth_init *eth; |
| void *init; |
| char *mac = NULL; |
| int match; |
| |
| spin_lock(&transports_lock); |
| BUG_ON(!list_empty(&new->list)); |
| list_add(&new->list, &transports); |
| spin_unlock(&transports_lock); |
| |
| list_for_each_safe(ele, next, ð_cmd_line) { |
| eth = list_entry(ele, struct eth_init, list); |
| match = check_transport(new, eth->init, eth->index, &init, |
| &mac, GFP_KERNEL); |
| if (!match) |
| continue; |
| else if (init != NULL) { |
| eth_configure(eth->index, init, mac, new, GFP_KERNEL); |
| kfree(init); |
| } |
| list_del(ð->list); |
| } |
| } |
| |
| static int eth_setup_common(char *str, int index) |
| { |
| struct list_head *ele; |
| struct transport *transport; |
| void *init; |
| char *mac = NULL; |
| int found = 0; |
| |
| spin_lock(&transports_lock); |
| list_for_each(ele, &transports) { |
| transport = list_entry(ele, struct transport, list); |
| if (!check_transport(transport, str, index, &init, |
| &mac, GFP_ATOMIC)) |
| continue; |
| if (init != NULL) { |
| eth_configure(index, init, mac, transport, GFP_ATOMIC); |
| kfree(init); |
| } |
| found = 1; |
| break; |
| } |
| |
| spin_unlock(&transports_lock); |
| return found; |
| } |
| |
| static int __init eth_setup(char *str) |
| { |
| struct eth_init *new; |
| char *error; |
| int n, err; |
| |
| err = eth_parse(str, &n, &str, &error); |
| if (err) { |
| printk(KERN_ERR "eth_setup - Couldn't parse '%s' : %s\n", |
| str, error); |
| return 1; |
| } |
| |
| new = memblock_alloc(sizeof(*new), SMP_CACHE_BYTES); |
| if (!new) |
| panic("%s: Failed to allocate %zu bytes\n", __func__, |
| sizeof(*new)); |
| |
| INIT_LIST_HEAD(&new->list); |
| new->index = n; |
| new->init = str; |
| |
| list_add_tail(&new->list, ð_cmd_line); |
| return 1; |
| } |
| |
| __setup("eth", eth_setup); |
| __uml_help(eth_setup, |
| "eth[0-9]+=<transport>,<options>\n" |
| " Configure a network device.\n\n" |
| ); |
| |
| static int net_config(char *str, char **error_out) |
| { |
| int n, err; |
| |
| err = eth_parse(str, &n, &str, error_out); |
| if (err) |
| return err; |
| |
| /* This string is broken up and the pieces used by the underlying |
| * driver. So, it is freed only if eth_setup_common fails. |
| */ |
| str = kstrdup(str, GFP_KERNEL); |
| if (str == NULL) { |
| *error_out = "net_config failed to strdup string"; |
| return -ENOMEM; |
| } |
| err = !eth_setup_common(str, n); |
| if (err) |
| kfree(str); |
| return err; |
| } |
| |
| static int net_id(char **str, int *start_out, int *end_out) |
| { |
| char *end; |
| int n; |
| |
| n = simple_strtoul(*str, &end, 0); |
| if ((*end != '\0') || (end == *str)) |
| return -1; |
| |
| *start_out = n; |
| *end_out = n; |
| *str = end; |
| return n; |
| } |
| |
| static int net_remove(int n, char **error_out) |
| { |
| struct uml_net *device; |
| struct net_device *dev; |
| struct uml_net_private *lp; |
| |
| device = find_device(n); |
| if (device == NULL) |
| return -ENODEV; |
| |
| dev = device->dev; |
| lp = netdev_priv(dev); |
| if (lp->fd > 0) |
| return -EBUSY; |
| unregister_netdev(dev); |
| platform_device_unregister(&device->pdev); |
| |
| return 0; |
| } |
| |
| static struct mc_device net_mc = { |
| .list = LIST_HEAD_INIT(net_mc.list), |
| .name = "eth", |
| .config = net_config, |
| .get_config = NULL, |
| .id = net_id, |
| .remove = net_remove, |
| }; |
| |
| #ifdef CONFIG_INET |
| static int uml_inetaddr_event(struct notifier_block *this, unsigned long event, |
| void *ptr) |
| { |
| struct in_ifaddr *ifa = ptr; |
| struct net_device *dev = ifa->ifa_dev->dev; |
| struct uml_net_private *lp; |
| void (*proc)(unsigned char *, unsigned char *, void *); |
| unsigned char addr_buf[4], netmask_buf[4]; |
| |
| if (dev->netdev_ops->ndo_open != uml_net_open) |
| return NOTIFY_DONE; |
| |
| lp = netdev_priv(dev); |
| |
| proc = NULL; |
| switch (event) { |
| case NETDEV_UP: |
| proc = lp->add_address; |
| break; |
| case NETDEV_DOWN: |
| proc = lp->delete_address; |
| break; |
| } |
| if (proc != NULL) { |
| memcpy(addr_buf, &ifa->ifa_address, sizeof(addr_buf)); |
| memcpy(netmask_buf, &ifa->ifa_mask, sizeof(netmask_buf)); |
| (*proc)(addr_buf, netmask_buf, &lp->user); |
| } |
| return NOTIFY_DONE; |
| } |
| |
| /* uml_net_init shouldn't be called twice on two CPUs at the same time */ |
| static struct notifier_block uml_inetaddr_notifier = { |
| .notifier_call = uml_inetaddr_event, |
| }; |
| |
| static void inet_register(void) |
| { |
| struct list_head *ele; |
| struct uml_net_private *lp; |
| struct in_device *ip; |
| struct in_ifaddr *in; |
| |
| register_inetaddr_notifier(¨_inetaddr_notifier); |
| |
| /* Devices may have been opened already, so the uml_inetaddr_notifier |
| * didn't get a chance to run for them. This fakes it so that |
| * addresses which have already been set up get handled properly. |
| */ |
| spin_lock(&opened_lock); |
| list_for_each(ele, &opened) { |
| lp = list_entry(ele, struct uml_net_private, list); |
| ip = lp->dev->ip_ptr; |
| if (ip == NULL) |
| continue; |
| in = ip->ifa_list; |
| while (in != NULL) { |
| uml_inetaddr_event(NULL, NETDEV_UP, in); |
| in = in->ifa_next; |
| } |
| } |
| spin_unlock(&opened_lock); |
| } |
| #else |
| static inline void inet_register(void) |
| { |
| } |
| #endif |
| |
| static int uml_net_init(void) |
| { |
| mconsole_register_dev(&net_mc); |
| inet_register(); |
| return 0; |
| } |
| |
| __initcall(uml_net_init); |
| |
| static void close_devices(void) |
| { |
| struct list_head *ele; |
| struct uml_net_private *lp; |
| |
| spin_lock(&opened_lock); |
| list_for_each(ele, &opened) { |
| lp = list_entry(ele, struct uml_net_private, list); |
| um_free_irq(lp->dev->irq, lp->dev); |
| if ((lp->close != NULL) && (lp->fd >= 0)) |
| (*lp->close)(lp->fd, &lp->user); |
| if (lp->remove != NULL) |
| (*lp->remove)(&lp->user); |
| } |
| spin_unlock(&opened_lock); |
| } |
| |
| __uml_exitcall(close_devices); |
| |
| void iter_addresses(void *d, void (*cb)(unsigned char *, unsigned char *, |
| void *), |
| void *arg) |
| { |
| struct net_device *dev = d; |
| struct in_device *ip = dev->ip_ptr; |
| struct in_ifaddr *in; |
| unsigned char address[4], netmask[4]; |
| |
| if (ip == NULL) return; |
| in = ip->ifa_list; |
| while (in != NULL) { |
| memcpy(address, &in->ifa_address, sizeof(address)); |
| memcpy(netmask, &in->ifa_mask, sizeof(netmask)); |
| (*cb)(address, netmask, arg); |
| in = in->ifa_next; |
| } |
| } |
| |
| int dev_netmask(void *d, void *m) |
| { |
| struct net_device *dev = d; |
| struct in_device *ip = dev->ip_ptr; |
| struct in_ifaddr *in; |
| __be32 *mask_out = m; |
| |
| if (ip == NULL) |
| return 1; |
| |
| in = ip->ifa_list; |
| if (in == NULL) |
| return 1; |
| |
| *mask_out = in->ifa_mask; |
| return 0; |
| } |
| |
| void *get_output_buffer(int *len_out) |
| { |
| void *ret; |
| |
| ret = (void *) __get_free_pages(GFP_KERNEL, 0); |
| if (ret) *len_out = PAGE_SIZE; |
| else *len_out = 0; |
| return ret; |
| } |
| |
| void free_output_buffer(void *buffer) |
| { |
| free_pages((unsigned long) buffer, 0); |
| } |
| |
| int tap_setup_common(char *str, char *type, char **dev_name, char **mac_out, |
| char **gate_addr) |
| { |
| char *remain; |
| |
| remain = split_if_spec(str, dev_name, mac_out, gate_addr, NULL); |
| if (remain != NULL) { |
| printk(KERN_ERR "tap_setup_common - Extra garbage on " |
| "specification : '%s'\n", remain); |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| unsigned short eth_protocol(struct sk_buff *skb) |
| { |
| return eth_type_trans(skb, skb->dev); |
| } |