diff options
Diffstat (limited to 'net/8021q')
| -rw-r--r-- | net/8021q/Makefile | 12 | ||||
| -rw-r--r-- | net/8021q/vlan.c | 774 | ||||
| -rw-r--r-- | net/8021q/vlan.h | 72 | ||||
| -rw-r--r-- | net/8021q/vlan_dev.c | 890 | ||||
| -rw-r--r-- | net/8021q/vlanproc.c | 357 | ||||
| -rw-r--r-- | net/8021q/vlanproc.h | 19 |
6 files changed, 2124 insertions, 0 deletions
diff --git a/net/8021q/Makefile b/net/8021q/Makefile new file mode 100644 index 0000000..97feb44 --- /dev/null +++ b/net/8021q/Makefile @@ -0,0 +1,12 @@ +# +# Makefile for the Linux VLAN layer. +# + +obj-$(CONFIG_VLAN_8021Q) += 8021q.o + +8021q-objs := vlan.o vlan_dev.o + +ifeq ($(CONFIG_PROC_FS),y) +8021q-objs += vlanproc.o +endif + diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c new file mode 100644 index 0000000..1f6d316 --- /dev/null +++ b/net/8021q/vlan.c @@ -0,0 +1,774 @@ +/* + * INET 802.1Q VLAN + * Ethernet-type device handling. + * + * Authors: Ben Greear <greearb@candelatech.com> + * Please send support related email to: vlan@scry.wanfear.com + * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html + * + * Fixes: + * Fix for packet capture - Nick Eggleston <nick@dccinc.com>; + * Add HW acceleration hooks - David S. Miller <davem@redhat.com>; + * Correct all the locking - David S. Miller <davem@redhat.com>; + * Use hash table for VLAN groups - David S. Miller <davem@redhat.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include <asm/uaccess.h> /* for copy_from_user */ +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/skbuff.h> +#include <net/datalink.h> +#include <linux/mm.h> +#include <linux/in.h> +#include <linux/init.h> +#include <net/p8022.h> +#include <net/arp.h> +#include <linux/rtnetlink.h> +#include <linux/notifier.h> + +#include <linux/if_vlan.h> +#include "vlan.h" +#include "vlanproc.h" + +#define DRV_VERSION "1.8" + +/* Global VLAN variables */ + +/* Our listing of VLAN group(s) */ +static struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE]; +#define vlan_grp_hashfn(IDX) ((((IDX) >> VLAN_GRP_HASH_SHIFT) ^ (IDX)) & VLAN_GRP_HASH_MASK) + +static char vlan_fullname[] = "802.1Q VLAN Support"; +static char vlan_version[] = DRV_VERSION; +static char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>"; +static char vlan_buggyright[] = "David S. Miller <davem@redhat.com>"; + +static int vlan_device_event(struct notifier_block *, unsigned long, void *); +static int vlan_ioctl_handler(void __user *); +static int unregister_vlan_dev(struct net_device *, unsigned short ); + +static struct notifier_block vlan_notifier_block = { + .notifier_call = vlan_device_event, +}; + +/* These may be changed at run-time through IOCTLs */ + +/* Determines interface naming scheme. */ +unsigned short vlan_name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; + +static struct packet_type vlan_packet_type = { + .type = __constant_htons(ETH_P_8021Q), + .func = vlan_skb_recv, /* VLAN receive method */ +}; + +/* Bits of netdev state that are propagated from real device to virtual */ +#define VLAN_LINK_STATE_MASK \ + ((1<<__LINK_STATE_PRESENT)|(1<<__LINK_STATE_NOCARRIER)) + +/* End of global variables definitions. */ + +/* + * Function vlan_proto_init (pro) + * + * Initialize VLAN protocol layer, + * + */ +static int __init vlan_proto_init(void) +{ + int err; + + printk(VLAN_INF "%s v%s %s\n", + vlan_fullname, vlan_version, vlan_copyright); + printk(VLAN_INF "All bugs added by %s\n", + vlan_buggyright); + + /* proc file system initialization */ + err = vlan_proc_init(); + if (err < 0) { + printk(KERN_ERR + "%s %s: can't create entry in proc filesystem!\n", + __FUNCTION__, VLAN_NAME); + return err; + } + + dev_add_pack(&vlan_packet_type); + + /* Register us to receive netdevice events */ + err = register_netdevice_notifier(&vlan_notifier_block); + if (err < 0) { + dev_remove_pack(&vlan_packet_type); + vlan_proc_cleanup(); + return err; + } + + vlan_ioctl_set(vlan_ioctl_handler); + + return 0; +} + +/* Cleanup all vlan devices + * Note: devices that have been registered that but not + * brought up will exist but have no module ref count. + */ +static void __exit vlan_cleanup_devices(void) +{ + struct net_device *dev, *nxt; + + rtnl_lock(); + for (dev = dev_base; dev; dev = nxt) { + nxt = dev->next; + if (dev->priv_flags & IFF_802_1Q_VLAN) { + unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev, + VLAN_DEV_INFO(dev)->vlan_id); + + unregister_netdevice(dev); + } + } + rtnl_unlock(); +} + +/* + * Module 'remove' entry point. + * o delete /proc/net/router directory and static entries. + */ +static void __exit vlan_cleanup_module(void) +{ + int i; + + vlan_ioctl_set(NULL); + + /* Un-register us from receiving netdevice events */ + unregister_netdevice_notifier(&vlan_notifier_block); + + dev_remove_pack(&vlan_packet_type); + vlan_cleanup_devices(); + + /* This table must be empty if there are no module + * references left. + */ + for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) { + BUG_ON(!hlist_empty(&vlan_group_hash[i])); + } + vlan_proc_cleanup(); + + synchronize_net(); +} + +module_init(vlan_proto_init); +module_exit(vlan_cleanup_module); + +/* Must be invoked with RCU read lock (no preempt) */ +static struct vlan_group *__vlan_find_group(int real_dev_ifindex) +{ + struct vlan_group *grp; + struct hlist_node *n; + int hash = vlan_grp_hashfn(real_dev_ifindex); + + hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) { + if (grp->real_dev_ifindex == real_dev_ifindex) + return grp; + } + + return NULL; +} + +/* Find the protocol handler. Assumes VID < VLAN_VID_MASK. + * + * Must be invoked with RCU read lock (no preempt) + */ +struct net_device *__find_vlan_dev(struct net_device *real_dev, + unsigned short VID) +{ + struct vlan_group *grp = __vlan_find_group(real_dev->ifindex); + + if (grp) + return grp->vlan_devices[VID]; + + return NULL; +} + +static void vlan_rcu_free(struct rcu_head *rcu) +{ + kfree(container_of(rcu, struct vlan_group, rcu)); +} + + +/* This returns 0 if everything went fine. + * It will return 1 if the group was killed as a result. + * A negative return indicates failure. + * + * The RTNL lock must be held. + */ +static int unregister_vlan_dev(struct net_device *real_dev, + unsigned short vlan_id) +{ + struct net_device *dev = NULL; + int real_dev_ifindex = real_dev->ifindex; + struct vlan_group *grp; + int i, ret; + +#ifdef VLAN_DEBUG + printk(VLAN_DBG "%s: VID: %i\n", __FUNCTION__, vlan_id); +#endif + + /* sanity check */ + if (vlan_id >= VLAN_VID_MASK) + return -EINVAL; + + ASSERT_RTNL(); + grp = __vlan_find_group(real_dev_ifindex); + + ret = 0; + + if (grp) { + dev = grp->vlan_devices[vlan_id]; + if (dev) { + /* Remove proc entry */ + vlan_proc_rem_dev(dev); + + /* Take it out of our own structures, but be sure to + * interlock with HW accelerating devices or SW vlan + * input packet processing. + */ + if (real_dev->features & + (NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER)) { + real_dev->vlan_rx_kill_vid(real_dev, vlan_id); + } + + grp->vlan_devices[vlan_id] = NULL; + synchronize_net(); + + + /* Caller unregisters (and if necessary, puts) + * VLAN device, but we get rid of the reference to + * real_dev here. + */ + dev_put(real_dev); + + /* If the group is now empty, kill off the + * group. + */ + for (i = 0; i < VLAN_VID_MASK; i++) + if (grp->vlan_devices[i]) + break; + + if (i == VLAN_VID_MASK) { + if (real_dev->features & NETIF_F_HW_VLAN_RX) + real_dev->vlan_rx_register(real_dev, NULL); + + hlist_del_rcu(&grp->hlist); + + /* Free the group, after all cpu's are done. */ + call_rcu(&grp->rcu, vlan_rcu_free); + + grp = NULL; + ret = 1; + } + } + } + + return ret; +} + +static int unregister_vlan_device(const char *vlan_IF_name) +{ + struct net_device *dev = NULL; + int ret; + + + dev = dev_get_by_name(vlan_IF_name); + ret = -EINVAL; + if (dev) { + if (dev->priv_flags & IFF_802_1Q_VLAN) { + rtnl_lock(); + + ret = unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev, + VLAN_DEV_INFO(dev)->vlan_id); + + dev_put(dev); + unregister_netdevice(dev); + + rtnl_unlock(); + + if (ret == 1) + ret = 0; + } else { + printk(VLAN_ERR + "%s: ERROR: Tried to remove a non-vlan device " + "with VLAN code, name: %s priv_flags: %hX\n", + __FUNCTION__, dev->name, dev->priv_flags); + dev_put(dev); + ret = -EPERM; + } + } else { +#ifdef VLAN_DEBUG + printk(VLAN_DBG "%s: WARNING: Could not find dev.\n", __FUNCTION__); +#endif + ret = -EINVAL; + } + + return ret; +} + +static void vlan_setup(struct net_device *new_dev) +{ + SET_MODULE_OWNER(new_dev); + + /* new_dev->ifindex = 0; it will be set when added to + * the global list. + * iflink is set as well. + */ + new_dev->get_stats = vlan_dev_get_stats; + + /* Make this thing known as a VLAN device */ + new_dev->priv_flags |= IFF_802_1Q_VLAN; + + /* Set us up to have no queue, as the underlying Hardware device + * can do all the queueing we could want. + */ + new_dev->tx_queue_len = 0; + + /* set up method calls */ + new_dev->change_mtu = vlan_dev_change_mtu; + new_dev->open = vlan_dev_open; + new_dev->stop = vlan_dev_stop; + new_dev->set_mac_address = vlan_dev_set_mac_address; + new_dev->set_multicast_list = vlan_dev_set_multicast_list; + new_dev->destructor = free_netdev; + new_dev->do_ioctl = vlan_dev_ioctl; +} + +/* Attach a VLAN device to a mac address (ie Ethernet Card). + * Returns the device that was created, or NULL if there was + * an error of some kind. + */ +static struct net_device *register_vlan_device(const char *eth_IF_name, + unsigned short VLAN_ID) +{ + struct vlan_group *grp; + struct net_device *new_dev; + struct net_device *real_dev; /* the ethernet device */ + char name[IFNAMSIZ]; + +#ifdef VLAN_DEBUG + printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n", + __FUNCTION__, eth_IF_name, VLAN_ID); +#endif + + if (VLAN_ID >= VLAN_VID_MASK) + goto out_ret_null; + + /* find the device relating to eth_IF_name. */ + real_dev = dev_get_by_name(eth_IF_name); + if (!real_dev) + goto out_ret_null; + + if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { + printk(VLAN_DBG "%s: VLANs not supported on %s.\n", + __FUNCTION__, real_dev->name); + goto out_put_dev; + } + + if ((real_dev->features & NETIF_F_HW_VLAN_RX) && + (real_dev->vlan_rx_register == NULL || + real_dev->vlan_rx_kill_vid == NULL)) { + printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", + __FUNCTION__, real_dev->name); + goto out_put_dev; + } + + if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && + (real_dev->vlan_rx_add_vid == NULL || + real_dev->vlan_rx_kill_vid == NULL)) { + printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", + __FUNCTION__, real_dev->name); + goto out_put_dev; + } + + /* From this point on, all the data structures must remain + * consistent. + */ + rtnl_lock(); + + /* The real device must be up and operating in order to + * assosciate a VLAN device with it. + */ + if (!(real_dev->flags & IFF_UP)) + goto out_unlock; + + if (__find_vlan_dev(real_dev, VLAN_ID) != NULL) { + /* was already registered. */ + printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__); + goto out_unlock; + } + + /* Gotta set up the fields for the device. */ +#ifdef VLAN_DEBUG + printk(VLAN_DBG "About to allocate name, vlan_name_type: %i\n", + vlan_name_type); +#endif + switch (vlan_name_type) { + case VLAN_NAME_TYPE_RAW_PLUS_VID: + /* name will look like: eth1.0005 */ + snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID); + break; + case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: + /* Put our vlan.VID in the name. + * Name will look like: vlan5 + */ + snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID); + break; + case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: + /* Put our vlan.VID in the name. + * Name will look like: eth0.5 + */ + snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID); + break; + case VLAN_NAME_TYPE_PLUS_VID: + /* Put our vlan.VID in the name. + * Name will look like: vlan0005 + */ + default: + snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID); + }; + + new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, + vlan_setup); + if (new_dev == NULL) + goto out_unlock; + +#ifdef VLAN_DEBUG + printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name); +#endif + /* IFF_BROADCAST|IFF_MULTICAST; ??? */ + new_dev->flags = real_dev->flags; + new_dev->flags &= ~IFF_UP; + + new_dev->state = real_dev->state & VLAN_LINK_STATE_MASK; + + /* need 4 bytes for extra VLAN header info, + * hope the underlying device can handle it. + */ + new_dev->mtu = real_dev->mtu; + + /* TODO: maybe just assign it to be ETHERNET? */ + new_dev->type = real_dev->type; + + new_dev->hard_header_len = real_dev->hard_header_len; + if (!(real_dev->features & NETIF_F_HW_VLAN_TX)) { + /* Regular ethernet + 4 bytes (18 total). */ + new_dev->hard_header_len += VLAN_HLEN; + } + + VLAN_MEM_DBG("new_dev->priv malloc, addr: %p size: %i\n", + new_dev->priv, + sizeof(struct vlan_dev_info)); + + memcpy(new_dev->broadcast, real_dev->broadcast, real_dev->addr_len); + memcpy(new_dev->dev_addr, real_dev->dev_addr, real_dev->addr_len); + new_dev->addr_len = real_dev->addr_len; + + if (real_dev->features & NETIF_F_HW_VLAN_TX) { + new_dev->hard_header = real_dev->hard_header; + new_dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit; + new_dev->rebuild_header = real_dev->rebuild_header; + } else { + new_dev->hard_header = vlan_dev_hard_header; + new_dev->hard_start_xmit = vlan_dev_hard_start_xmit; + new_dev->rebuild_header = vlan_dev_rebuild_header; + } + new_dev->hard_header_parse = real_dev->hard_header_parse; + + VLAN_DEV_INFO(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */ + VLAN_DEV_INFO(new_dev)->real_dev = real_dev; + VLAN_DEV_INFO(new_dev)->dent = NULL; + VLAN_DEV_INFO(new_dev)->flags = 1; + +#ifdef VLAN_DEBUG + printk(VLAN_DBG "About to go find the group for idx: %i\n", + real_dev->ifindex); +#endif + + if (register_netdevice(new_dev)) + goto out_free_newdev; + + /* So, got the sucker initialized, now lets place + * it into our local structure. + */ + grp = __vlan_find_group(real_dev->ifindex); + + /* Note, we are running under the RTNL semaphore + * so it cannot "appear" on us. + */ + if (!grp) { /* need to add a new group */ + grp = kmalloc(sizeof(struct vlan_group), GFP_KERNEL); + if (!grp) + goto out_free_unregister; + + /* printk(KERN_ALERT "VLAN REGISTER: Allocated new group.\n"); */ + memset(grp, 0, sizeof(struct vlan_group)); + grp->real_dev_ifindex = real_dev->ifindex; + + hlist_add_head_rcu(&grp->hlist, + &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]); + + if (real_dev->features & NETIF_F_HW_VLAN_RX) + real_dev->vlan_rx_register(real_dev, grp); + } + + grp->vlan_devices[VLAN_ID] = new_dev; + + if (vlan_proc_add_dev(new_dev)<0)/* create it's proc entry */ + printk(KERN_WARNING "VLAN: failed to add proc entry for %s\n", + new_dev->name); + + if (real_dev->features & NETIF_F_HW_VLAN_FILTER) + real_dev->vlan_rx_add_vid(real_dev, VLAN_ID); + + rtnl_unlock(); + + +#ifdef VLAN_DEBUG + printk(VLAN_DBG "Allocated new device successfully, returning.\n"); +#endif + return new_dev; + +out_free_unregister: + unregister_netdev(new_dev); + goto out_unlock; + +out_free_newdev: + free_netdev(new_dev); + +out_unlock: + rtnl_unlock(); + +out_put_dev: + dev_put(real_dev); + +out_ret_null: + return NULL; +} + +static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr) +{ + struct net_device *dev = ptr; + struct vlan_group *grp = __vlan_find_group(dev->ifindex); + int i, flgs; + struct net_device *vlandev; + + if (!grp) + goto out; + + /* It is OK that we do not hold the group lock right now, + * as we run under the RTNL lock. + */ + + switch (event) { + case NETDEV_CHANGE: + /* Propagate real device state to vlan devices */ + flgs = dev->state & VLAN_LINK_STATE_MASK; + for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { + vlandev = grp->vlan_devices[i]; + if (!vlandev) + continue; + + if ((vlandev->state & VLAN_LINK_STATE_MASK) != flgs) { + vlandev->state = (vlandev->state &~ VLAN_LINK_STATE_MASK) + | flgs; + netdev_state_change(vlandev); + } + } + break; + + case NETDEV_DOWN: + /* Put all VLANs for this dev in the down state too. */ + for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { + vlandev = grp->vlan_devices[i]; + if (!vlandev) + continue; + + flgs = vlandev->flags; + if (!(flgs & IFF_UP)) + continue; + + dev_change_flags(vlandev, flgs & ~IFF_UP); + } + break; + + case NETDEV_UP: + /* Put all VLANs for this dev in the up state too. */ + for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { + vlandev = grp->vlan_devices[i]; + if (!vlandev) + continue; + + flgs = vlandev->flags; + if (flgs & IFF_UP) + continue; + + dev_change_flags(vlandev, flgs | IFF_UP); + } + break; + + case NETDEV_UNREGISTER: + /* Delete all VLANs for this dev. */ + for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { + int ret; + + vlandev = grp->vlan_devices[i]; + if (!vlandev) + continue; + + ret = unregister_vlan_dev(dev, + VLAN_DEV_INFO(vlandev)->vlan_id); + + unregister_netdevice(vlandev); + + /* Group was destroyed? */ + if (ret == 1) + break; + } + break; + }; + +out: + return NOTIFY_DONE; +} + +/* + * VLAN IOCTL handler. + * o execute requested action or pass command to the device driver + * arg is really a struct vlan_ioctl_args __user *. + */ +static int vlan_ioctl_handler(void __user *arg) +{ + int err = 0; + unsigned short vid = 0; + struct vlan_ioctl_args args; + + if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) + return -EFAULT; + + /* Null terminate this sucker, just in case. */ + args.device1[23] = 0; + args.u.device2[23] = 0; + +#ifdef VLAN_DEBUG + printk(VLAN_DBG "%s: args.cmd: %x\n", __FUNCTION__, args.cmd); +#endif + + switch (args.cmd) { + case SET_VLAN_INGRESS_PRIORITY_CMD: + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + err = vlan_dev_set_ingress_priority(args.device1, + args.u.skb_priority, + args.vlan_qos); + break; + + case SET_VLAN_EGRESS_PRIORITY_CMD: + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + err = vlan_dev_set_egress_priority(args.device1, + args.u.skb_priority, + args.vlan_qos); + break; + + case SET_VLAN_FLAG_CMD: + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + err = vlan_dev_set_vlan_flag(args.device1, + args.u.flag, + args.vlan_qos); + break; + + case SET_VLAN_NAME_TYPE_CMD: + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + if ((args.u.name_type >= 0) && + (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { + vlan_name_type = args.u.name_type; + err = 0; + } else { + err = -EINVAL; + } + break; + + case ADD_VLAN_CMD: + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + /* we have been given the name of the Ethernet Device we want to + * talk to: args.dev1 We also have the + * VLAN ID: args.u.VID + */ + if (register_vlan_device(args.device1, args.u.VID)) { + err = 0; + } else { + err = -EINVAL; + } + break; + + case DEL_VLAN_CMD: + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + /* Here, the args.dev1 is the actual VLAN we want + * to get rid of. + */ + err = unregister_vlan_device(args.device1); + break; + + case GET_VLAN_INGRESS_PRIORITY_CMD: + /* TODO: Implement + err = vlan_dev_get_ingress_priority(args); + if (copy_to_user((void*)arg, &args, + sizeof(struct vlan_ioctl_args))) { + err = -EFAULT; + } + */ + err = -EINVAL; + break; + case GET_VLAN_EGRESS_PRIORITY_CMD: + /* TODO: Implement + err = vlan_dev_get_egress_priority(args.device1, &(args.args); + if (copy_to_user((void*)arg, &args, + sizeof(struct vlan_ioctl_args))) { + err = -EFAULT; + } + */ + err = -EINVAL; + break; + case GET_VLAN_REALDEV_NAME_CMD: + err = vlan_dev_get_realdev_name(args.device1, args.u.device2); + if (copy_to_user(arg, &args, + sizeof(struct vlan_ioctl_args))) { + err = -EFAULT; + } + break; + + case GET_VLAN_VID_CMD: + err = vlan_dev_get_vid(args.device1, &vid); + args.u.VID = vid; + if (copy_to_user(arg, &args, + sizeof(struct vlan_ioctl_args))) { + err = -EFAULT; + } + break; + + default: + /* pass on to underlying device instead?? */ + printk(VLAN_DBG "%s: Unknown VLAN CMD: %x \n", + __FUNCTION__, args.cmd); + return -EINVAL; + }; + + return err; +} + +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRV_VERSION); diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h new file mode 100644 index 0000000..508b1fa --- /dev/null +++ b/net/8021q/vlan.h @@ -0,0 +1,72 @@ +#ifndef __BEN_VLAN_802_1Q_INC__ +#define __BEN_VLAN_802_1Q_INC__ + +#include <linux/if_vlan.h> + +/* Uncomment this if you want debug traces to be shown. */ +/* #define VLAN_DEBUG */ + +#define VLAN_ERR KERN_ERR +#define VLAN_INF KERN_INFO +#define VLAN_DBG KERN_ALERT /* change these... to debug, having a hard time + * changing the log level at run-time..for some reason. + */ + +/* + +These I use for memory debugging. I feared a leak at one time, but +I never found it..and the problem seems to have dissappeared. Still, +I'll bet they might prove useful again... --Ben + + +#define VLAN_MEM_DBG(x, y, z) printk(VLAN_DBG "%s: " x, __FUNCTION__, y, z); +#define VLAN_FMEM_DBG(x, y) printk(VLAN_DBG "%s: " x, __FUNCTION__, y); +*/ + +/* This way they don't do anything! */ +#define VLAN_MEM_DBG(x, y, z) +#define VLAN_FMEM_DBG(x, y) + + +extern unsigned short vlan_name_type; + +#define VLAN_GRP_HASH_SHIFT 5 +#define VLAN_GRP_HASH_SIZE (1 << VLAN_GRP_HASH_SHIFT) +#define VLAN_GRP_HASH_MASK (VLAN_GRP_HASH_SIZE - 1) + +/* Find a VLAN device by the MAC address of its Ethernet device, and + * it's VLAN ID. The default configuration is to have VLAN's scope + * to be box-wide, so the MAC will be ignored. The mac will only be + * looked at if we are configured to have a separate set of VLANs per + * each MAC addressable interface. Note that this latter option does + * NOT follow the spec for VLANs, but may be useful for doing very + * large quantities of VLAN MUX/DEMUX onto FrameRelay or ATM PVCs. + * + * Must be invoked with rcu_read_lock (ie preempt disabled) + * or with RTNL. + */ +struct net_device *__find_vlan_dev(struct net_device* real_dev, + unsigned short VID); /* vlan.c */ + +/* found in vlan_dev.c */ +int vlan_dev_rebuild_header(struct sk_buff *skb); +int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev, + struct packet_type* ptype); +int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, + unsigned short type, void *daddr, void *saddr, + unsigned len); +int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev); +int vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb, struct net_device *dev); +int vlan_dev_change_mtu(struct net_device *dev, int new_mtu); +int vlan_dev_set_mac_address(struct net_device *dev, void* addr); +int vlan_dev_open(struct net_device* dev); +int vlan_dev_stop(struct net_device* dev); +int vlan_dev_ioctl(struct net_device* dev, struct ifreq *ifr, int cmd); +int vlan_dev_set_ingress_priority(char* dev_name, __u32 skb_prio, short vlan_prio); +int vlan_dev_set_egress_priority(char* dev_name, __u32 skb_prio, short vlan_prio); +int vlan_dev_set_vlan_flag(char* dev_name, __u32 flag, short flag_val); +int vlan_dev_get_realdev_name(const char* dev_name, char* result); +int vlan_dev_get_vid(const char* dev_name, unsigned short* result); +void vlan_dev_set_multicast_list(struct net_device *vlan_dev); + +#endif /* !(__BEN_VLAN_802_1Q_INC__) */ diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c new file mode 100644 index 0000000..49c4874 --- /dev/null +++ b/net/8021q/vlan_dev.c @@ -0,0 +1,890 @@ +/* -*- linux-c -*- + * INET 802.1Q VLAN + * Ethernet-type device handling. + * + * Authors: Ben Greear <greearb@candelatech.com> + * Please send support related email to: vlan@scry.wanfear.com + * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html + * + * Fixes: Mar 22 2001: Martin Bokaemper <mbokaemper@unispherenetworks.com> + * - reset skb->pkt_type on incoming packets when MAC was changed + * - see that changed MAC is saddr for outgoing packets + * Oct 20, 2001: Ard van Breeman: + * - Fix MC-list, finally. + * - Flush MC-list on VLAN destroy. + * + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include <linux/module.h> +#include <linux/mm.h> +#include <linux/in.h> +#include <linux/init.h> +#include <asm/uaccess.h> /* for copy_from_user */ +#include <linux/skbuff.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <net/datalink.h> +#include <net/p8022.h> +#include <net/arp.h> + +#include "vlan.h" +#include "vlanproc.h" +#include <linux/if_vlan.h> +#include <net/ip.h> + +/* + * Rebuild the Ethernet MAC header. This is called after an ARP + * (or in future other address resolution) has completed on this + * sk_buff. We now let ARP fill in the other fields. + * + * This routine CANNOT use cached dst->neigh! + * Really, it is used only when dst->neigh is wrong. + * + * TODO: This needs a checkup, I'm ignorant here. --BLG + */ +int vlan_dev_rebuild_header(struct sk_buff *skb) +{ + struct net_device *dev = skb->dev; + struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); + + switch (veth->h_vlan_encapsulated_proto) { +#ifdef CONFIG_INET + case __constant_htons(ETH_P_IP): + + /* TODO: Confirm this will work with VLAN headers... */ + return arp_find(veth->h_dest, skb); +#endif + default: + printk(VLAN_DBG + "%s: unable to resolve type %X addresses.\n", + dev->name, (int)veth->h_vlan_encapsulated_proto); + + memcpy(veth->h_source, dev->dev_addr, ETH_ALEN); + break; + }; + + return 0; +} + +static inline struct sk_buff *vlan_check_reorder_header(struct sk_buff *skb) +{ + if (VLAN_DEV_INFO(skb->dev)->flags & 1) { + if (skb_shared(skb) || skb_cloned(skb)) { + struct sk_buff *nskb = skb_copy(skb, GFP_ATOMIC); + kfree_skb(skb); + skb = nskb; + } + if (skb) { + /* Lifted from Gleb's VLAN code... */ + memmove(skb->data - ETH_HLEN, + skb->data - VLAN_ETH_HLEN, 12); + skb->mac.raw += VLAN_HLEN; + } + } + + return skb; +} + +/* + * Determine the packet's protocol ID. The rule here is that we + * assume 802.3 if the type field is short enough to be a length. + * This is normal practice and works for any 'now in use' protocol. + * + * Also, at this point we assume that we ARE dealing exclusively with + * VLAN packets, or packets that should be made into VLAN packets based + * on a default VLAN ID. + * + * NOTE: Should be similar to ethernet/eth.c. + * + * SANITY NOTE: This method is called when a packet is moving up the stack + * towards userland. To get here, it would have already passed + * through the ethernet/eth.c eth_type_trans() method. + * SANITY NOTE 2: We are referencing to the VLAN_HDR frields, which MAY be + * stored UNALIGNED in the memory. RISC systems don't like + * such cases very much... + * SANITY NOTE 2a: According to Dave Miller & Alexey, it will always be aligned, + * so there doesn't need to be any of the unaligned stuff. It has + * been commented out now... --Ben + * + */ +int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev, + struct packet_type* ptype) +{ + unsigned char *rawp = NULL; + struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data); + unsigned short vid; + struct net_device_stats *stats; + unsigned short vlan_TCI; + unsigned short proto; + + /* vlan_TCI = ntohs(get_unaligned(&vhdr->h_vlan_TCI)); */ + vlan_TCI = ntohs(vhdr->h_vlan_TCI); + + vid = (vlan_TCI & VLAN_VID_MASK); + +#ifdef VLAN_DEBUG + printk(VLAN_DBG "%s: skb: %p vlan_id: %hx\n", + __FUNCTION__, skb, vid); +#endif + + /* Ok, we will find the correct VLAN device, strip the header, + * and then go on as usual. + */ + + /* We have 12 bits of vlan ID. + * + * We must not drop allow preempt until we hold a + * reference to the device (netif_rx does that) or we + * fail. + */ + + rcu_read_lock(); + skb->dev = __find_vlan_dev(dev, vid); + if (!skb->dev) { + rcu_read_unlock(); + +#ifdef VLAN_DEBUG + printk(VLAN_DBG "%s: ERROR: No net_device for VID: %i on dev: %s [%i]\n", + __FUNCTION__, (unsigned int)(vid), dev->name, dev->ifindex); +#endif + kfree_skb(skb); + return -1; + } + + skb->dev->last_rx = jiffies; + + /* Bump the rx counters for the VLAN device. */ + stats = vlan_dev_get_stats(skb->dev); + stats->rx_packets++; + stats->rx_bytes += skb->len; + + skb_pull(skb, VLAN_HLEN); /* take off the VLAN header (4 bytes currently) */ + + /* Ok, lets check to make sure the device (dev) we + * came in on is what this VLAN is attached to. + */ + + if (dev != VLAN_DEV_INFO(skb->dev)->real_dev) { + rcu_read_unlock(); + +#ifdef VLAN_DEBUG + printk(VLAN_DBG "%s: dropping skb: %p because came in on wrong device, dev: %s real_dev: %s, skb_dev: %s\n", + __FUNCTION__, skb, dev->name, + VLAN_DEV_INFO(skb->dev)->real_dev->name, + skb->dev->name); +#endif + kfree_skb(skb); + stats->rx_errors++; + return -1; + } + + /* + * Deal with ingress priority mapping. + */ + skb->priority = vlan_get_ingress_priority(skb->dev, ntohs(vhdr->h_vlan_TCI)); + +#ifdef VLAN_DEBUG + printk(VLAN_DBG "%s: priority: %lu for TCI: %hu (hbo)\n", + __FUNCTION__, (unsigned long)(skb->priority), + ntohs(vhdr->h_vlan_TCI)); +#endif + + /* The ethernet driver already did the pkt_type calculations + * for us... + */ + switch (skb->pkt_type) { + case PACKET_BROADCAST: /* Yeah, stats collect these together.. */ + // stats->broadcast ++; // no such counter :-( + break; + + case PACKET_MULTICAST: + stats->multicast++; + break; + + case PACKET_OTHERHOST: + /* Our lower layer thinks this is not local, let's make sure. + * This allows the VLAN to have a different MAC than the underlying + * device, and still route correctly. + */ + if (memcmp(eth_hdr(skb)->h_dest, skb->dev->dev_addr, ETH_ALEN) == 0) { + /* It is for our (changed) MAC-address! */ + skb->pkt_type = PACKET_HOST; + } + break; + default: + break; + }; + + /* Was a VLAN packet, grab the encapsulated protocol, which the layer + * three protocols care about. + */ + /* proto = get_unaligned(&vhdr->h_vlan_encapsulated_proto); */ + proto = vhdr->h_vlan_encapsulated_proto; + + skb->protocol = proto; + if (ntohs(proto) >= 1536) { + /* place it back on the queue to be handled by + * true layer 3 protocols. + */ + + /* See if we are configured to re-write the VLAN header + * to make it look like ethernet... + */ + skb = vlan_check_reorder_header(skb); + + /* Can be null if skb-clone fails when re-ordering */ + if (skb) { + netif_rx(skb); + } else { + /* TODO: Add a more specific counter here. */ + stats->rx_errors++; + } + rcu_read_unlock(); + return 0; + } + + rawp = skb->data; + + /* + * This is a magic hack to spot IPX packets. Older Novell breaks + * the protocol design and runs IPX over 802.3 without an 802.2 LLC + * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This + * won't work for fault tolerant netware but does for the rest. + */ + if (*(unsigned short *)rawp == 0xFFFF) { + skb->protocol = __constant_htons(ETH_P_802_3); + /* place it back on the queue to be handled by true layer 3 protocols. + */ + + /* See if we are configured to re-write the VLAN header + * to make it look like ethernet... + */ + skb = vlan_check_reorder_header(skb); + + /* Can be null if skb-clone fails when re-ordering */ + if (skb) { + netif_rx(skb); + } else { + /* TODO: Add a more specific counter here. */ + stats->rx_errors++; + } + rcu_read_unlock(); + return 0; + } + + /* + * Real 802.2 LLC + */ + skb->protocol = __constant_htons(ETH_P_802_2); + /* place it back on the queue to be handled by upper layer protocols. + */ + + /* See if we are configured to re-write the VLAN header + * to make it look like ethernet... + */ + skb = vlan_check_reorder_header(skb); + + /* Can be null if skb-clone fails when re-ordering */ + if (skb) { + netif_rx(skb); + } else { + /* TODO: Add a more specific counter here. */ + stats->rx_errors++; + } + rcu_read_unlock(); + return 0; +} + +static inline unsigned short vlan_dev_get_egress_qos_mask(struct net_device* dev, + struct sk_buff* skb) +{ + struct vlan_priority_tci_mapping *mp = + VLAN_DEV_INFO(dev)->egress_priority_map[(skb->priority & 0xF)]; + + while (mp) { + if (mp->priority == skb->priority) { + return mp->vlan_qos; /* This should already be shifted to mask + * correctly with the VLAN's TCI + */ + } + mp = mp->next; + } + return 0; +} + +/* + * Create the VLAN header for an arbitrary protocol layer + * + * saddr=NULL means use device source address + * daddr=NULL means leave destination address (eg unresolved arp) + * + * This is called when the SKB is moving down the stack towards the + * physical devices. + */ +int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, + unsigned short type, void *daddr, void *saddr, + unsigned len) +{ + struct vlan_hdr *vhdr; + unsigned short veth_TCI = 0; + int rc = 0; + int build_vlan_header = 0; + struct net_device *vdev = dev; /* save this for the bottom of the method */ + +#ifdef VLAN_DEBUG + printk(VLAN_DBG "%s: skb: %p type: %hx len: %x vlan_id: %hx, daddr: %p\n", + __FUNCTION__, skb, type, len, VLAN_DEV_INFO(dev)->vlan_id, daddr); +#endif + + /* build vlan header only if re_order_header flag is NOT set. This + * fixes some programs that get confused when they see a VLAN device + * sending a frame that is VLAN encoded (the consensus is that the VLAN + * device should look completely like an Ethernet device when the + * REORDER_HEADER flag is set) The drawback to this is some extra + * header shuffling in the hard_start_xmit. Users can turn off this + * REORDER behaviour with the vconfig tool. + */ + build_vlan_header = ((VLAN_DEV_INFO(dev)->flags & 1) == 0); + + if (build_vlan_header) { + vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); + + /* build the four bytes that make this a VLAN header. */ + + /* Now, construct the second two bytes. This field looks something + * like: + * usr_priority: 3 bits (high bits) + * CFI 1 bit + * VLAN ID 12 bits (low bits) + * + */ + veth_TCI = VLAN_DEV_INFO(dev)->vlan_id; + veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); + + vhdr->h_vlan_TCI = htons(veth_TCI); + + /* + * Set the protocol type. + * For a packet of type ETH_P_802_3 we put the length in here instead. + * It is up to the 802.2 layer to carry protocol information. + */ + + if (type != ETH_P_802_3) { + vhdr->h_vlan_encapsulated_proto = htons(type); + } else { + vhdr->h_vlan_encapsulated_proto = htons(len); + } + } + + /* Before delegating work to the lower layer, enter our MAC-address */ + if (saddr == NULL) + saddr = dev->dev_addr; + + dev = VLAN_DEV_INFO(dev)->real_dev; + + /* MPLS can send us skbuffs w/out enough space. This check will grow the + * skb if it doesn't have enough headroom. Not a beautiful solution, so + * I'll tick a counter so that users can know it's happening... If they + * care... + */ + + /* NOTE: This may still break if the underlying device is not the final + * device (and thus there are more headers to add...) It should work for + * good-ole-ethernet though. + */ + if (skb_headroom(skb) < dev->hard_header_len) { + struct sk_buff *sk_tmp = skb; + skb = skb_realloc_headroom(sk_tmp, dev->hard_header_len); + kfree_skb(sk_tmp); + if (skb == NULL) { + struct net_device_stats *stats = vlan_dev_get_stats(vdev); + stats->tx_dropped++; + return -ENOMEM; + } + VLAN_DEV_INFO(vdev)->cnt_inc_headroom_on_tx++; +#ifdef VLAN_DEBUG + printk(VLAN_DBG "%s: %s: had to grow skb.\n", __FUNCTION__, vdev->name); +#endif + } + + if (build_vlan_header) { + /* Now make the underlying real hard header */ + rc = dev->hard_header(skb, dev, ETH_P_8021Q, daddr, saddr, len + VLAN_HLEN); + + if (rc > 0) { + rc += VLAN_HLEN; + } else if (rc < 0) { + rc -= VLAN_HLEN; + } + } else { + /* If here, then we'll just make a normal looking ethernet frame, + * but, the hard_start_xmit method will insert the tag (it has to + * be able to do this for bridged and other skbs that don't come + * down the protocol stack in an orderly manner. + */ + rc = dev->hard_header(skb, dev, type, daddr, saddr, len); + } + + return rc; +} + +int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct net_device_stats *stats = vlan_dev_get_stats(dev); + struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); + + /* Handle non-VLAN frames if they are sent to us, for example by DHCP. + * + * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING + * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... + */ + + if (veth->h_vlan_proto != __constant_htons(ETH_P_8021Q)) { + int orig_headroom = skb_headroom(skb); + unsigned short veth_TCI; + + /* This is not a VLAN frame...but we can fix that! */ + VLAN_DEV_INFO(dev)->cnt_encap_on_xmit++; + +#ifdef VLAN_DEBUG + printk(VLAN_DBG "%s: proto to encap: 0x%hx (hbo)\n", + __FUNCTION__, htons(veth->h_vlan_proto)); +#endif + /* Construct the second two bytes. This field looks something + * like: + * usr_priority: 3 bits (high bits) + * CFI 1 bit + * VLAN ID 12 bits (low bits) + */ + veth_TCI = VLAN_DEV_INFO(dev)->vlan_id; + veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); + + skb = __vlan_put_tag(skb, veth_TCI); + if (!skb) { + stats->tx_dropped++; + return 0; + } + + if (orig_headroom < VLAN_HLEN) { + VLAN_DEV_INFO(dev)->cnt_inc_headroom_on_tx++; + } + } + +#ifdef VLAN_DEBUG + printk(VLAN_DBG "%s: about to send skb: %p to dev: %s\n", + __FUNCTION__, skb, skb->dev->name); + printk(VLAN_DBG " %2hx.%2hx.%2hx.%2xh.%2hx.%2hx %2hx.%2hx.%2hx.%2hx.%2hx.%2hx %4hx %4hx %4hx\n", + veth->h_dest[0], veth->h_dest[1], veth->h_dest[2], veth->h_dest[3], veth->h_dest[4], veth->h_dest[5], + veth->h_source[0], veth->h_source[1], veth->h_source[2], veth->h_source[3], veth->h_source[4], veth->h_source[5], + veth->h_vlan_proto, veth->h_vlan_TCI, veth->h_vlan_encapsulated_proto); +#endif + + stats->tx_packets++; /* for statics only */ + stats->tx_bytes += skb->len; + + skb->dev = VLAN_DEV_INFO(dev)->real_dev; + dev_queue_xmit(skb); + + return 0; +} + +int vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct net_device_stats *stats = vlan_dev_get_stats(dev); + unsigned short veth_TCI; + + /* Construct the second two bytes. This field looks something + * like: + * usr_priority: 3 bits (high bits) + * CFI 1 bit + * VLAN ID 12 bits (low bits) + */ + veth_TCI = VLAN_DEV_INFO(dev)->vlan_id; + veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); + skb = __vlan_hwaccel_put_tag(skb, veth_TCI); + + stats->tx_packets++; + stats->tx_bytes += skb->len; + + skb->dev = VLAN_DEV_INFO(dev)->real_dev; + dev_queue_xmit(skb); + + return 0; +} + +int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) +{ + /* TODO: gotta make sure the underlying layer can handle it, + * maybe an IFF_VLAN_CAPABLE flag for devices? + */ + if (VLAN_DEV_INFO(dev)->real_dev->mtu < new_mtu) + return -ERANGE; + + dev->mtu = new_mtu; + + return 0; +} + +int vlan_dev_set_ingress_priority(char *dev_name, __u32 skb_prio, short vlan_prio) +{ + struct net_device *dev = dev_get_by_name(dev_name); + + if (dev) { + if (dev->priv_flags & IFF_802_1Q_VLAN) { + /* see if a priority mapping exists.. */ + VLAN_DEV_INFO(dev)->ingress_priority_map[vlan_prio & 0x7] = skb_prio; + dev_put(dev); + return 0; + } + + dev_put(dev); + } + return -EINVAL; +} + +int vlan_dev_set_egress_priority(char *dev_name, __u32 skb_prio, short vlan_prio) +{ + struct net_device *dev = dev_get_by_name(dev_name); + struct vlan_priority_tci_mapping *mp = NULL; + struct vlan_priority_tci_mapping *np; + + if (dev) { + if (dev->priv_flags & IFF_802_1Q_VLAN) { + /* See if a priority mapping exists.. */ + mp = VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF]; + while (mp) { + if (mp->priority == skb_prio) { + mp->vlan_qos = ((vlan_prio << 13) & 0xE000); + dev_put(dev); + return 0; + } + mp = mp->next; + } + + /* Create a new mapping then. */ + mp = VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF]; + np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); + if (np) { + np->next = mp; + np->priority = skb_prio; + np->vlan_qos = ((vlan_prio << 13) & 0xE000); + VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF] = np; + dev_put(dev); + return 0; + } else { + dev_put(dev); + return -ENOBUFS; + } + } + dev_put(dev); + } + return -EINVAL; +} + +/* Flags are defined in the vlan_dev_info class in include/linux/if_vlan.h file. */ +int vlan_dev_set_vlan_flag(char *dev_name, __u32 flag, short flag_val) +{ + struct net_device *dev = dev_get_by_name(dev_name); + + if (dev) { + if (dev->priv_flags & IFF_802_1Q_VLAN) { + /* verify flag is supported */ + if (flag == 1) { + if (flag_val) { + VLAN_DEV_INFO(dev)->flags |= 1; + } else { + VLAN_DEV_INFO(dev)->flags &= ~1; + } + dev_put(dev); + return 0; + } else { + printk(KERN_ERR "%s: flag %i is not valid.\n", + __FUNCTION__, (int)(flag)); + dev_put(dev); + return -EINVAL; + } + } else { + printk(KERN_ERR + "%s: %s is not a vlan device, priv_flags: %hX.\n", + __FUNCTION__, dev->name, dev->priv_flags); + dev_put(dev); + } + } else { + printk(KERN_ERR "%s: Could not find device: %s\n", + __FUNCTION__, dev_name); + } + + return -EINVAL; +} + + +int vlan_dev_get_realdev_name(const char *dev_name, char* result) +{ + struct net_device *dev = dev_get_by_name(dev_name); + int rv = 0; + if (dev) { + if (dev->priv_flags & IFF_802_1Q_VLAN) { + strncpy(result, VLAN_DEV_INFO(dev)->real_dev->name, 23); + rv = 0; + } else { + rv = -EINVAL; + } + dev_put(dev); + } else { + rv = -ENODEV; + } + return rv; +} + +int vlan_dev_get_vid(const char *dev_name, unsigned short* result) +{ + struct net_device *dev = dev_get_by_name(dev_name); + int rv = 0; + if (dev) { + if (dev->priv_flags & IFF_802_1Q_VLAN) { + *result = VLAN_DEV_INFO(dev)->vlan_id; + rv = 0; + } else { + rv = -EINVAL; + } + dev_put(dev); + } else { + rv = -ENODEV; + } + return rv; +} + + +int vlan_dev_set_mac_address(struct net_device *dev, void *addr_struct_p) +{ + struct sockaddr *addr = (struct sockaddr *)(addr_struct_p); + int i; + + if (netif_running(dev)) + return -EBUSY; + + memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); + + printk("%s: Setting MAC address to ", dev->name); + for (i = 0; i < 6; i++) + printk(" %2.2x", dev->dev_addr[i]); + printk(".\n"); + + if (memcmp(VLAN_DEV_INFO(dev)->real_dev->dev_addr, + dev->dev_addr, + dev->addr_len) != 0) { + if (!(VLAN_DEV_INFO(dev)->real_dev->flags & IFF_PROMISC)) { + int flgs = VLAN_DEV_INFO(dev)->real_dev->flags; + + /* Increment our in-use promiscuity counter */ + dev_set_promiscuity(VLAN_DEV_INFO(dev)->real_dev, 1); + + /* Make PROMISC visible to the user. */ + flgs |= IFF_PROMISC; + printk("VLAN (%s): Setting underlying device (%s) to promiscious mode.\n", + dev->name, VLAN_DEV_INFO(dev)->real_dev->name); + dev_change_flags(VLAN_DEV_INFO(dev)->real_dev, flgs); + } + } else { + printk("VLAN (%s): Underlying device (%s) has same MAC, not checking promiscious mode.\n", + dev->name, VLAN_DEV_INFO(dev)->real_dev->name); + } + + return 0; +} + +static inline int vlan_dmi_equals(struct dev_mc_list *dmi1, + struct dev_mc_list *dmi2) +{ + return ((dmi1->dmi_addrlen == dmi2->dmi_addrlen) && + (memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0)); +} + +/** dmi is a single entry into a dev_mc_list, a single node. mc_list is + * an entire list, and we'll iterate through it. + */ +static int vlan_should_add_mc(struct dev_mc_list *dmi, struct dev_mc_list *mc_list) +{ + struct dev_mc_list *idmi; + + for (idmi = mc_list; idmi != NULL; ) { + if (vlan_dmi_equals(dmi, idmi)) { + if (dmi->dmi_users > idmi->dmi_users) + return 1; + else + return 0; + } else { + idmi = idmi->next; + } + } + + return 1; +} + +static inline void vlan_destroy_mc_list(struct dev_mc_list *mc_list) +{ + struct dev_mc_list *dmi = mc_list; + struct dev_mc_list *next; + + while(dmi) { + next = dmi->next; + kfree(dmi); + dmi = next; + } +} + +static void vlan_copy_mc_list(struct dev_mc_list *mc_list, struct vlan_dev_info *vlan_info) +{ + struct dev_mc_list *dmi, *new_dmi; + + vlan_destroy_mc_list(vlan_info->old_mc_list); + vlan_info->old_mc_list = NULL; + + for (dmi = mc_list; dmi != NULL; dmi = dmi->next) { + new_dmi = kmalloc(sizeof(*new_dmi), GFP_ATOMIC); + if (new_dmi == NULL) { + printk(KERN_ERR "vlan: cannot allocate memory. " + "Multicast may not work properly from now.\n"); + return; + } + + /* Copy whole structure, then make new 'next' pointer */ + *new_dmi = *dmi; + new_dmi->next = vlan_info->old_mc_list; + vlan_info->old_mc_list = new_dmi; + } +} + +static void vlan_flush_mc_list(struct net_device *dev) +{ + struct dev_mc_list *dmi = dev->mc_list; + + while (dmi) { + printk(KERN_DEBUG "%s: del %.2x:%.2x:%.2x:%.2x:%.2x:%.2x mcast address from vlan interface\n", + dev->name, + dmi->dmi_addr[0], + dmi->dmi_addr[1], + dmi->dmi_addr[2], + dmi->dmi_addr[3], + dmi->dmi_addr[4], + dmi->dmi_addr[5]); + dev_mc_delete(dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); + dmi = dev->mc_list; + } + + /* dev->mc_list is NULL by the time we get here. */ + vlan_destroy_mc_list(VLAN_DEV_INFO(dev)->old_mc_list); + VLAN_DEV_INFO(dev)->old_mc_list = NULL; +} + +int vlan_dev_open(struct net_device *dev) +{ + if (!(VLAN_DEV_INFO(dev)->real_dev->flags & IFF_UP)) + return -ENETDOWN; + + return 0; +} + +int vlan_dev_stop(struct net_device *dev) +{ + vlan_flush_mc_list(dev); + return 0; +} + +int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) +{ + struct net_device *real_dev = VLAN_DEV_INFO(dev)->real_dev; + struct ifreq ifrr; + int err = -EOPNOTSUPP; + + strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); + ifrr.ifr_ifru = ifr->ifr_ifru; + + switch(cmd) { + case SIOCGMIIPHY: + case SIOCGMIIREG: + case SIOCSMIIREG: + if (real_dev->do_ioctl && netif_device_present(real_dev)) + err = real_dev->do_ioctl(real_dev, &ifrr, cmd); + break; + + case SIOCETHTOOL: + err = dev_ethtool(&ifrr); + } + + if (!err) + ifr->ifr_ifru = ifrr.ifr_ifru; + + return err; +} + +/** Taken from Gleb + Lennert's VLAN code, and modified... */ +void vlan_dev_set_multicast_list(struct net_device *vlan_dev) +{ + struct dev_mc_list *dmi; + struct net_device *real_dev; + int inc; + + if (vlan_dev && (vlan_dev->priv_flags & IFF_802_1Q_VLAN)) { + /* Then it's a real vlan device, as far as we can tell.. */ + real_dev = VLAN_DEV_INFO(vlan_dev)->real_dev; + + /* compare the current promiscuity to the last promisc we had.. */ + inc = vlan_dev->promiscuity - VLAN_DEV_INFO(vlan_dev)->old_promiscuity; + if (inc) { + printk(KERN_INFO "%s: dev_set_promiscuity(master, %d)\n", + vlan_dev->name, inc); + dev_set_promiscuity(real_dev, inc); /* found in dev.c */ + VLAN_DEV_INFO(vlan_dev)->old_promiscuity = vlan_dev->promiscuity; + } + + inc = vlan_dev->allmulti - VLAN_DEV_INFO(vlan_dev)->old_allmulti; + if (inc) { + printk(KERN_INFO "%s: dev_set_allmulti(master, %d)\n", + vlan_dev->name, inc); + dev_set_allmulti(real_dev, inc); /* dev.c */ + VLAN_DEV_INFO(vlan_dev)->old_allmulti = vlan_dev->allmulti; + } + + /* looking for addresses to add to master's list */ + for (dmi = vlan_dev->mc_list; dmi != NULL; dmi = dmi->next) { + if (vlan_should_add_mc(dmi, VLAN_DEV_INFO(vlan_dev)->old_mc_list)) { + dev_mc_add(real_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); + printk(KERN_DEBUG "%s: add %.2x:%.2x:%.2x:%.2x:%.2x:%.2x mcast address to master interface\n", + vlan_dev->name, + dmi->dmi_addr[0], + dmi->dmi_addr[1], + dmi->dmi_addr[2], + dmi->dmi_addr[3], + dmi->dmi_addr[4], + dmi->dmi_addr[5]); + } + } + + /* looking for addresses to delete from master's list */ + for (dmi = VLAN_DEV_INFO(vlan_dev)->old_mc_list; dmi != NULL; dmi = dmi->next) { + if (vlan_should_add_mc(dmi, vlan_dev->mc_list)) { + /* if we think we should add it to the new list, then we should really + * delete it from the real list on the underlying device. + */ + dev_mc_delete(real_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); + printk(KERN_DEBUG "%s: del %.2x:%.2x:%.2x:%.2x:%.2x:%.2x mcast address from master interface\n", + vlan_dev->name, + dmi->dmi_addr[0], + dmi->dmi_addr[1], + dmi->dmi_addr[2], + dmi->dmi_addr[3], + dmi->dmi_addr[4], + dmi->dmi_addr[5]); + } + } + + /* save multicast list */ + vlan_copy_mc_list(vlan_dev->mc_list, VLAN_DEV_INFO(vlan_dev)); + } +} diff --git a/net/8021q/vlanproc.c b/net/8021q/vlanproc.c new file mode 100644 index 0000000..c32d27a --- /dev/null +++ b/net/8021q/vlanproc.c @@ -0,0 +1,357 @@ +/****************************************************************************** + * vlanproc.c VLAN Module. /proc filesystem interface. + * + * This module is completely hardware-independent and provides + * access to the router using Linux /proc filesystem. + * + * Author: Ben Greear, <greearb@candelatech.com> coppied from wanproc.c + * by: Gene Kozin <genek@compuserve.com> + * + * Copyright: (c) 1998 Ben Greear + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * ============================================================================ + * Jan 20, 1998 Ben Greear Initial Version + *****************************************************************************/ + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/stddef.h> /* offsetof(), etc. */ +#include <linux/errno.h> /* return codes */ +#include <linux/kernel.h> +#include <linux/slab.h> /* kmalloc(), kfree() */ +#include <linux/mm.h> /* verify_area(), etc. */ +#include <linux/string.h> /* inline mem*, str* functions */ +#include <linux/init.h> /* __initfunc et al. */ +#include <asm/byteorder.h> /* htons(), etc. */ +#include <asm/uaccess.h> /* copy_to_user */ +#include <asm/io.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> +#include <linux/fs.h> +#include <linux/netdevice.h> +#include <linux/if_vlan.h> +#include "vlanproc.h" +#include "vlan.h" + +/****** Function Prototypes *************************************************/ + +/* Methods for preparing data for reading proc entries */ +static int vlan_seq_show(struct seq_file *seq, void *v); +static void *vlan_seq_start(struct seq_file *seq, loff_t *pos); +static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos); +static void vlan_seq_stop(struct seq_file *seq, void *); +static int vlandev_seq_show(struct seq_file *seq, void *v); + +/* + * Global Data + */ + + +/* + * Names of the proc directory entries + */ + +static const char name_root[] = "vlan"; +static const char name_conf[] = "config"; + +/* + * Structures for interfacing with the /proc filesystem. + * VLAN creates its own directory /proc/net/vlan with the folowing + * entries: + * config device status/configuration + * <device> entry for each device + */ + +/* + * Generic /proc/net/vlan/<file> file and inode operations + */ + +static struct seq_operations vlan_seq_ops = { + .start = vlan_seq_start, + .next = vlan_seq_next, + .stop = vlan_seq_stop, + .show = vlan_seq_show, +}; + +static int vlan_seq_open(struct inode *inode, struct file *file) +{ + return seq_open(file, &vlan_seq_ops); +} + +static struct file_operations vlan_fops = { + .owner = THIS_MODULE, + .open = vlan_seq_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + +/* + * /proc/net/vlan/<device> file and inode operations + */ + +static int vlandev_seq_open(struct inode *inode, struct file *file) +{ + return single_open(file, vlandev_seq_show, PDE(inode)->data); +} + +static struct file_operations vlandev_fops = { + .owner = THIS_MODULE, + .open = vlandev_seq_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +/* + * Proc filesystem derectory entries. + */ + +/* + * /proc/net/vlan + */ + +static struct proc_dir_entry *proc_vlan_dir; + +/* + * /proc/net/vlan/config + */ + +static struct proc_dir_entry *proc_vlan_conf; + +/* Strings */ +static const char *vlan_name_type_str[VLAN_NAME_TYPE_HIGHEST] = { + [VLAN_NAME_TYPE_RAW_PLUS_VID] = "VLAN_NAME_TYPE_RAW_PLUS_VID", + [VLAN_NAME_TYPE_PLUS_VID_NO_PAD] = "VLAN_NAME_TYPE_PLUS_VID_NO_PAD", + [VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD]= "VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD", + [VLAN_NAME_TYPE_PLUS_VID] = "VLAN_NAME_TYPE_PLUS_VID", +}; +/* + * Interface functions + */ + +/* + * Clean up /proc/net/vlan entries + */ + +void vlan_proc_cleanup(void) +{ + if (proc_vlan_conf) + remove_proc_entry(name_conf, proc_vlan_dir); + + if (proc_vlan_dir) + proc_net_remove(name_root); + + /* Dynamically added entries should be cleaned up as their vlan_device + * is removed, so we should not have to take care of it here... + */ +} + +/* + * Create /proc/net/vlan entries + */ + +int __init vlan_proc_init(void) +{ + proc_vlan_dir = proc_mkdir(name_root, proc_net); + if (proc_vlan_dir) { + proc_vlan_conf = create_proc_entry(name_conf, + S_IFREG|S_IRUSR|S_IWUSR, + proc_vlan_dir); + if (proc_vlan_conf) { + proc_vlan_conf->proc_fops = &vlan_fops; + return 0; + } + } + vlan_proc_cleanup(); + return -ENOBUFS; +} + +/* + * Add directory entry for VLAN device. + */ + +int vlan_proc_add_dev (struct net_device *vlandev) +{ + struct vlan_dev_info *dev_info = VLAN_DEV_INFO(vlandev); + + if (!(vlandev->priv_flags & IFF_802_1Q_VLAN)) { + printk(KERN_ERR + "ERROR: vlan_proc_add, device -:%s:- is NOT a VLAN\n", + vlandev->name); + return -EINVAL; + } + + dev_info->dent = create_proc_entry(vlandev->name, + S_IFREG|S_IRUSR|S_IWUSR, + proc_vlan_dir); + if (!dev_info->dent) + return -ENOBUFS; + + dev_info->dent->proc_fops = &vlandev_fops; + dev_info->dent->data = vlandev; + +#ifdef VLAN_DEBUG + printk(KERN_ERR "vlan_proc_add, device -:%s:- being added.\n", + vlandev->name); +#endif + return 0; +} + +/* + * Delete directory entry for VLAN device. + */ +int vlan_proc_rem_dev(struct net_device *vlandev) +{ + if (!vlandev) { + printk(VLAN_ERR "%s: invalid argument: %p\n", + __FUNCTION__, vlandev); + return -EINVAL; + } + + if (!(vlandev->priv_flags & IFF_802_1Q_VLAN)) { + printk(VLAN_DBG "%s: invalid argument, device: %s is not a VLAN device, priv_flags: 0x%4hX.\n", + __FUNCTION__, vlandev->name, vlandev->priv_flags); + return -EINVAL; + } + +#ifdef VLAN_DEBUG + printk(VLAN_DBG "%s: dev: %p\n", __FUNCTION__, vlandev); +#endif + + /** NOTE: This will consume the memory pointed to by dent, it seems. */ + if (VLAN_DEV_INFO(vlandev)->dent) { + remove_proc_entry(VLAN_DEV_INFO(vlandev)->dent->name, proc_vlan_dir); + VLAN_DEV_INFO(vlandev)->dent = NULL; + } + + return 0; +} + +/****** Proc filesystem entry points ****************************************/ + +/* + * The following few functions build the content of /proc/net/vlan/config + */ + +/* starting at dev, find a VLAN device */ +static struct net_device *vlan_skip(struct net_device *dev) +{ + while (dev && !(dev->priv_flags & IFF_802_1Q_VLAN)) + dev = dev->next; + + return dev; +} + +/* start read of /proc/net/vlan/config */ +static void *vlan_seq_start(struct seq_file *seq, loff_t *pos) +{ + struct net_device *dev; + loff_t i = 1; + + read_lock(&dev_base_lock); + + if (*pos == 0) + return SEQ_START_TOKEN; + + for (dev = vlan_skip(dev_base); dev && i < *pos; + dev = vlan_skip(dev->next), ++i); + + return (i == *pos) ? dev : NULL; +} + +static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos) +{ + ++*pos; + + return vlan_skip((v == SEQ_START_TOKEN) + ? dev_base + : ((struct net_device *)v)->next); +} + +static void vlan_seq_stop(struct seq_file *seq, void *v) +{ + read_unlock(&dev_base_lock); +} + +static int vlan_seq_show(struct seq_file *seq, void *v) +{ + if (v == SEQ_START_TOKEN) { + const char *nmtype = NULL; + + seq_puts(seq, "VLAN Dev name | VLAN ID\n"); + + if (vlan_name_type < ARRAY_SIZE(vlan_name_type_str)) + nmtype = vlan_name_type_str[vlan_name_type]; + + seq_printf(seq, "Name-Type: %s\n", + nmtype ? nmtype : "UNKNOWN" ); + } else { + const struct net_device *vlandev = v; + const struct vlan_dev_info *dev_info = VLAN_DEV_INFO(vlandev); + + seq_printf(seq, "%-15s| %d | %s\n", vlandev->name, + dev_info->vlan_id, dev_info->real_dev->name); + } + return 0; +} + +static int vlandev_seq_show(struct seq_file *seq, void *offset) +{ + struct net_device *vlandev = (struct net_device *) seq->private; + const struct vlan_dev_info *dev_info = VLAN_DEV_INFO(vlandev); + struct net_device_stats *stats; + static const char fmt[] = "%30s %12lu\n"; + int i; + + if ((vlandev == NULL) || (!(vlandev->priv_flags & IFF_802_1Q_VLAN))) + return 0; + + seq_printf(seq, "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n", + vlandev->name, dev_info->vlan_id, + (int)(dev_info->flags & 1), vlandev->priv_flags); + + + stats = vlan_dev_get_stats(vlandev); + + seq_printf(seq, fmt, "total frames received", stats->rx_packets); + seq_printf(seq, fmt, "total bytes received", stats->rx_bytes); + seq_printf(seq, fmt, "Broadcast/Multicast Rcvd", stats->multicast); + seq_puts(seq, "\n"); + seq_printf(seq, fmt, "total frames transmitted", stats->tx_packets); + seq_printf(seq, fmt, "total bytes transmitted", stats->tx_bytes); + seq_printf(seq, fmt, "total headroom inc", + dev_info->cnt_inc_headroom_on_tx); + seq_printf(seq, fmt, "total encap on xmit", + dev_info->cnt_encap_on_xmit); + seq_printf(seq, "Device: %s", dev_info->real_dev->name); + /* now show all PRIORITY mappings relating to this VLAN */ + seq_printf(seq, + "\nINGRESS priority mappings: 0:%lu 1:%lu 2:%lu 3:%lu 4:%lu 5:%lu 6:%lu 7:%lu\n", + dev_info->ingress_priority_map[0], + dev_info->ingress_priority_map[1], + dev_info->ingress_priority_map[2], + dev_info->ingress_priority_map[3], + dev_info->ingress_priority_map[4], + dev_info->ingress_priority_map[5], + dev_info->ingress_priority_map[6], + dev_info->ingress_priority_map[7]); + + seq_printf(seq, "EGRESSS priority Mappings: "); + for (i = 0; i < 16; i++) { + const struct vlan_priority_tci_mapping *mp + = dev_info->egress_priority_map[i]; + while (mp) { + seq_printf(seq, "%lu:%hu ", + mp->priority, ((mp->vlan_qos >> 13) & 0x7)); + mp = mp->next; + } + } + seq_puts(seq, "\n"); + + return 0; +} diff --git a/net/8021q/vlanproc.h b/net/8021q/vlanproc.h new file mode 100644 index 0000000..f908ee3 --- /dev/null +++ b/net/8021q/vlanproc.h @@ -0,0 +1,19 @@ +#ifndef __BEN_VLAN_PROC_INC__ +#define __BEN_VLAN_PROC_INC__ + +#ifdef CONFIG_PROC_FS +int vlan_proc_init(void); +int vlan_proc_rem_dev(struct net_device *vlandev); +int vlan_proc_add_dev (struct net_device *vlandev); +void vlan_proc_cleanup (void); + +#else /* No CONFIG_PROC_FS */ + +#define vlan_proc_init() (0) +#define vlan_proc_cleanup() do {} while(0) +#define vlan_proc_add_dev(dev) ({(void)(dev), 0;}) +#define vlan_proc_rem_dev(dev) ({(void)(dev), 0;}) + +#endif + +#endif /* !(__BEN_VLAN_PROC_INC__) */ |
