summaryrefslogtreecommitdiff
path: root/arch/um/drivers/net_kern.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/um/drivers/net_kern.c')
-rw-r--r--arch/um/drivers/net_kern.c889
1 files changed, 0 insertions, 889 deletions
diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c
deleted file mode 100644
index d5a9c5aabaec..000000000000
--- a/arch/um/drivers/net_kern.c
+++ /dev/null
@@ -1,889 +0,0 @@
-// 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 netdev_tx_t 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)
-{
- strscpy(info->driver, DRIVER_NAME);
-}
-
-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,
-};
-
-void uml_net_setup_etheraddr(struct net_device *dev, char *str)
-{
- u8 addr[ETH_ALEN];
- 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]);
- }
- eth_hw_addr_set(dev, addr);
- 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 = container_of(dev, struct uml_net, pdev.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(&uml_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 });
-
- 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 = &uml_netdev_ops;
- dev->ethtool_ops = &uml_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, &eth_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(&eth->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_or_panic(sizeof(*new), SMP_CACHE_BYTES);
-
- INIT_LIST_HEAD(&new->list);
- new->index = n;
- new->init = str;
-
- list_add_tail(&new->list, &eth_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(&uml_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);
-}
generated by cgit (git 2.34.1) at 2025-06-07 12:19:23 +0000