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SubjectRe: Should VLANs be devices or something else?
Andi Kleen wrote:
>
> Ben Greear <greearb@candelatech.com> writes:
> >
> > Adding the hashed lookup for devices took the exponential curve out of
> > ip and ifconfig's performance, btw.
>
> And fixing the ifconfig user data structures took it also.
> Probably just ip needs similar tuning.
> No need to add the name lookup hash table to the kernel.

ip is still much faster than ifconfig for large numbers of devices
(say, 1000+).

If I remember correctly, it takes about 20 seconds to do an 'ip addr show'
for 4000 interfaces. Most of that time is in the kernel. This may be
acceptable, but I know it can be made faster with hashing and/or some other
clever way...

If you are interested in exact numbers, I (or you) can run the vlan_test.pl script in
my vlan distribution (also attached). It currently has the ifconfig -a
part commented out because it makes the test script take too long. The script
can also generate output ready to be fed into gnuplot.

>
> Perhaps it would be best if you could post your current patch without
> these hash tables, so that it can be properly reviewed and hopefully
> merged then.

Agreed. It is attached. I have placed 'TODO' comments in the patch
where I had questions, I would especially like feedback on these areas
of the code...

>
> -Andi

--
Ben Greear <greearb@candelatech.com> <Ben_Greear@excite.com>
President of Candela Technologies Inc http://www.candelatech.com
ScryMUD: http://scry.wanfear.com http://scry.wanfear.com/~greeardiff -u -r -N -X /home/greear/exclude.list linux/include/linux/if_ether.h linux.dev/include/linux/if_ether.h
--- linux/include/linux/if_ether.h Thu Apr 19 08:38:50 2001
+++ linux.dev/include/linux/if_ether.h Tue Jun 19 14:47:52 2001
@@ -56,6 +56,7 @@
#define ETH_P_RARP 0x8035 /* Reverse Addr Res packet */
#define ETH_P_ATALK 0x809B /* Appletalk DDP */
#define ETH_P_AARP 0x80F3 /* Appletalk AARP */
+#define ETH_P_8021Q 0x8100 /* 802.1Q VLAN Extended Header */
#define ETH_P_IPX 0x8137 /* IPX over DIX */
#define ETH_P_IPV6 0x86DD /* IPv6 over bluebook */
#define ETH_P_PPP_DISC 0x8863 /* PPPoE discovery messages */
diff -u -r -N -X /home/greear/exclude.list linux/include/linux/if_vlan.h linux.dev/include/linux/if_vlan.h
--- linux/include/linux/if_vlan.h Wed Dec 31 17:00:00 1969
+++ linux.dev/include/linux/if_vlan.h Tue Jun 19 15:27:50 2001
@@ -0,0 +1,271 @@
+/* -*- linux-c -*-
+ * VLAN An implementation of 802.1Q VLAN tagging.
+ *
+ * For some idea of the architecture, see the web page at (curently):
+ * http://scry.wanfear.com/~greear/vlan.html
+ *
+ * Also, I will put comments in this file to try to explain some general
+ * architecture. --Ben
+ *
+ *
+ * Authors: Ben Greear <greearb@candelatech.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.
+ *
+ */
+
+#ifndef _LINUX_IF_VLAN_H_
+#define _LINUX_IF_VLAN_H_
+
+#ifdef __KERNEL__
+
+
+/* externally defined structs */
+struct vlan_group;
+struct net_device;
+struct sk_buff;
+struct packet_type;
+struct vlan_collection;
+
+
+#include <linux/proc_fs.h> /* for proc_dir_entry */
+#include <linux/netdevice.h>
+
+
+#define VLAN_HLEN 4 /* The additional bytes (on top of the Ethernet header)
+ * that VLAN requires.
+ */
+
+#define VLAN_ETH_ALEN 6 /* Octets in one ethernet addr */
+#define VLAN_ETH_HLEN 18 /* Total octets in header. */
+#define VLAN_ETH_ZLEN 64 /* Min. octets in frame sans FCS */
+
+/*
+ * According to 802.3ac, the packet can be 4 bytes longer. --Klika Jan
+ */
+#define VLAN_ETH_DATA_LEN 1500 /* Max. octets in payload */
+#define VLAN_ETH_FRAME_LEN 1518 /* Max. octets in frame sans FCS */
+
+struct vlan_ethhdr {
+ unsigned char h_dest[ETH_ALEN]; /* destination eth addr */
+ unsigned char h_source[ETH_ALEN]; /* source ether addr */
+ unsigned short h_vlan_proto; /* Should always be 0x8100 */
+ unsigned short h_vlan_TCI; /* Encapsulates priority and VLAN ID */
+ unsigned short h_vlan_encapsulated_proto; /* packet type ID field (or len) */
+};
+
+struct vlan_hdr {
+ unsigned short h_vlan_TCI; /* Encapsulates priority and VLAN ID */
+ unsigned short h_vlan_encapsulated_proto; /* packet type ID field (or len) */
+};
+
+
+
+/* Find a VLAN device by the MAC address of it's 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 seperate 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.
+ */
+struct net_device *find_802_1Q_vlan_dev(struct net_device* real_dev,
+ unsigned short VID); /* vlan.c */
+
+
+
+int dev_new_index(void); /* dev.c */
+
+/* found in vlan_dev.c */
+struct net_device_stats* vlan_dev_get_stats(struct net_device* dev);
+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_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_init(struct net_device* dev);
+void vlan_dev_destruct(struct net_device* dev);
+/* I'm ignorant of these right now. --BLG
+ int vlan_dev_header_cache(struct neighbour *neigh, struct hh_cache *hh);
+ void vlan_dev_header_cache_update(struct hh_cache *hh, struct device *dev,
+ unsigned char * haddr);
+*/
+void vlan_dev_copy_and_sum(struct sk_buff *dest, unsigned char *src,
+ int length, int base);
+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);
+
+/* VLAN multicast stuff */
+/* Delete all of the MC list entries from this vlan device. Also deals
+ * with the underlying device...
+ */
+void vlan_flush_mc_list(struct net_device* dev);
+/* copy the mc_list into the vlan_info structure. */
+void vlan_copy_mc_list(struct dev_mc_list* mc_list, struct vlan_dev_info* vlan_info);
+/** 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.
+ */
+int vlan_should_add_mc(struct dev_mc_list *dmi, struct dev_mc_list *mc_list);
+/** Taken from Gleb + Lennert's VLAN code, and modified... */
+void vlan_dev_set_multicast_list(struct net_device *vlan_dev);
+
+
+int vlan_collection_add_vlan(struct vlan_collection* vc, unsigned short vlan_id,
+ unsigned short flags);
+int vlan_collection_remove_vlan(struct vlan_collection* vc,
+ struct net_device* vlan_dev);
+int vlan_collection_remove_vlan_id(struct vlan_collection* vc, unsigned short vlan_id);
+
+
+
+/* found in vlan.c */
+/* Our listing of VLAN group(s) */
+extern struct vlan_group* p802_1Q_vlan_list;
+
+
+#define VLAN_NAME "vlan"
+
+/* if this changes, algorithm will have to be reworked because this
+ * depends on completely exhausting the VLAN identifier space. Thus
+ * it gives constant time look-up, but it many cases it wastes memory.
+ */
+#define VLAN_GROUP_ARRAY_LEN 4096
+
+struct vlan_group {
+ int real_dev_ifindex; /* The ifindex of the ethernet(like) device the vlan is attached to. */
+ struct net_device* vlan_devices[VLAN_GROUP_ARRAY_LEN];
+
+ struct vlan_group* next; /* the next in the list */
+};
+
+
+struct vlan_priority_tci_mapping {
+ unsigned long priority;
+ unsigned short vlan_qos; /* This should be shifted when first set, so we only do it
+ * at provisioning time.
+ * ((skb->priority << 13) & 0xE000)
+ */
+ struct vlan_priority_tci_mapping* next;
+};
+
+
+
+/* Holds information that makes sense if this device is a VLAN device. */
+struct vlan_dev_info {
+ /** This will be the mapping that correlates skb->priority to
+ * 3 bits of VLAN QOS tags...
+ */
+ unsigned long ingress_priority_map[8];
+ struct vlan_priority_tci_mapping* egress_priority_map[16]; /* hash table */
+
+ unsigned short vlan_id; /* The VLAN Identifier for this interface. */
+ unsigned short flags; /* (1 << 0) re_order_header This option will cause the
+ * VLAN code to move around the ethernet header on
+ * ingress to make the skb look **exactly** like it
+ * came in from an ethernet port. This destroys some of
+ * the VLAN information in the skb, but it fixes programs
+ * like DHCP that use packet-filtering and don't understand
+ * 802.1Q
+ */
+ struct dev_mc_list* old_mc_list; /* old multi-cast list for the VLAN interface..
+ * we save this so we can tell what changes were
+ * made, in order to feed the right changes down
+ * to the real hardware...
+ */
+ int old_allmulti; /* similar to above. */
+ int old_promiscuity; /* similar to above. */
+ struct net_device* real_dev; /* the underlying device/interface */
+ struct proc_dir_entry* dent; /* Holds the proc data */
+ unsigned long cnt_inc_headroom_on_tx; /* How many times did we have to grow the skb on TX. */
+ unsigned long cnt_encap_on_xmit; /* How many times did we have to encapsulate the skb on TX. */
+};
+
+/* inline functions */
+
+static inline unsigned short vlan_dev_get_egress_qos_mask(struct net_device* dev, struct sk_buff* skb) {
+ struct vlan_priority_tci_mapping* mp = dev->vlan_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;
+}
+
+
+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));
+}
+
+static inline void vlan_destroy_mc_list(struct dev_mc_list *mc_list) {
+ struct dev_mc_list *dmi = mc_list, *next;
+
+ while(dmi) {
+ next = dmi->next;
+ kfree(dmi);
+ dmi = next;
+ }
+}
+
+#endif /* __KERNEL__ */
+
+/** These are the IOCTLs relating to the /proc/net/vlan/ * files.
+ * Not all may be supported at this time, and some may be primarily
+ * used for testing and obtaining non-standard access to kernel
+ * devices.
+ */
+
+#define VLAN_IOCTL 0x52 /* TODO: Can I just make these up??? */
+
+enum vlan_ioctls {
+ ADD_VLAN_IOCTL = (VLAN_IOCTL << 8),
+ DEL_VLAN_IOCTL,
+ SET_INGRESS_PRIORITY_IOCTL,
+ SET_EGRESS_PRIORITY_IOCTL,
+ GET_INGRESS_PRIORITY_IOCTL,
+ GET_EGRESS_PRIORITY_IOCTL,
+ SET_NAME_TYPE_IOCTL,
+ SET_VLAN_FLAG_IOCTL
+}; /* vlan_ioctl enum */
+
+
+enum vlan_name_types {
+ VLAN_NAME_TYPE_PLUS_VID, /* Name will look like: vlan0005 */
+ VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like: eth1.0005 */
+ VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like: vlan5 */
+ VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like: eth0.5 */
+ VLAN_NAME_TYPE_HIGHEST
+};
+
+struct vlan_ioctl_args {
+ char dev1[24];
+
+ union {
+ char dev2[24];
+ int VID;
+ unsigned long skb_priority;
+ unsigned long name_type;
+ unsigned long bind_type;
+ unsigned long flag; /* Matches vlan_dev_info flags */
+ } u;
+
+ short vlan_qos;
+};
+
+
+#endif
diff -u -r -N -X /home/greear/exclude.list linux/include/linux/netdevice.h linux.dev/include/linux/netdevice.h
--- linux/include/linux/netdevice.h Fri May 25 18:02:01 2001
+++ linux.dev/include/linux/netdevice.h Tue Jun 19 15:19:01 2001
@@ -37,8 +37,14 @@
#include <linux/config.h>
#ifdef CONFIG_NET_PROFILE
#include <net/profile.h>
+
+#endif
+
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
+struct vlan_dev_info;
#endif

+
struct divert_blk;

#define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
@@ -72,7 +78,11 @@
*/

#if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
+#define LL_MAX_HEADER 36
+#else
#define LL_MAX_HEADER 32
+#endif
#else
#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
#define LL_MAX_HEADER 96
@@ -183,12 +193,24 @@
{
struct hh_cache *hh_next; /* Next entry */
atomic_t hh_refcnt; /* number of users */
- unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP */
+ unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP
+ * NOTE: For VLANs, this will be the
+ * encapuslated type. --BLG
+ */
int hh_len; /* length of header */
int (*hh_output)(struct sk_buff *skb);
rwlock_t hh_lock;
/* cached hardware header; allow for machine alignment needs. */
- unsigned long hh_data[16/sizeof(unsigned long)];
+
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
+ /* we need 4 extra bytes for VLAN headers
+ * FIXME: DO THIS ONLY IF WE REALLY START TO DO VLAN HEADER
+ * CACHE THING! MAKE SURE THIS WORKS WHEN sizeof(long) > 4 ! */
+ unsigned long hh_data[20/sizeof(__u32)];
+#else
+ unsigned long hh_data[16/sizeof(unsigned long)];
+#endif
+
};

/* These flag bits are private to the generic network queueing
@@ -394,6 +416,12 @@

/* open/release and usage marking */
struct module *owner;
+
+
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
+ /* Holds information that makes sense if this device is a VLAN device. */
+ struct vlan_dev_info* vlan_dev;
+#endif

/* bridge stuff */
struct net_bridge_port *br_port;
diff -u -r -N -X /home/greear/exclude.list linux/net/8021q/Makefile linux.dev/net/8021q/Makefile
--- linux/net/8021q/Makefile Wed Dec 31 17:00:00 1969
+++ linux.dev/net/8021q/Makefile Tue Jun 19 14:47:52 2001
@@ -0,0 +1,19 @@
+#
+# Makefile for the Linux VLAN layer.
+#
+# Note! Dependencies are done automagically by 'make dep', which also
+# removes any old dependencies. DON'T put your own dependencies here
+# unless it's something special (ie not a .c file).
+#
+# Note 2! The CFLAGS definition is now in the main makefile...
+
+O_TARGET := 8021q.o
+
+obj-y := vlan.o vlanproc.o vlan_dev.o
+obj-m := $(O_TARGET)
+obj-$(CONFIG_SYSCTL) += sysctl_net_vlan.o
+
+include $(TOPDIR)/Rules.make
+
+tar:
+ tar -cvf /dev/f1 .
diff -u -r -N -X /home/greear/exclude.list linux/net/8021q/sysctl_net_vlan.c linux.dev/net/8021q/sysctl_net_vlan.c
--- linux/net/8021q/sysctl_net_vlan.c Wed Dec 31 17:00:00 1969
+++ linux.dev/net/8021q/sysctl_net_vlan.c Tue Jun 19 14:47:52 2001
@@ -0,0 +1,20 @@
+/*
+ * sysctl_net_vlan.c: sysctl interface to net Ethernet VLAN subsystem.
+ *
+ * Begun Dec 20, 1998, Ben Greear
+ *
+ * TODO: What, if anything, should this do??
+ */
+
+#include <linux/module.h>
+
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
+
+#include <linux/mm.h>
+#include <linux/sysctl.h>
+
+ctl_table ether_vlan_table[] = {
+ {0}
+};
+
+#endif
diff -u -r -N -X /home/greear/exclude.list linux/net/8021q/vlan.c linux.dev/net/8021q/vlan.c
--- linux/net/8021q/vlan.c Wed Dec 31 17:00:00 1969
+++ linux.dev/net/8021q/vlan.c Tue Jun 19 19:23:12 2001
@@ -0,0 +1,438 @@
+/* -*- linux-c -*-
+ * INET An implementation of the TCP/IP protocol suite for the LINUX
+ * operating system. INET is implemented using the BSD Socket
+ * interface as the means of communication with the user level.
+ *
+ * Ethernet-type device handling.
+ *
+ * Version: @(#)vlan.c started 12/21/98
+ *
+ * Authors: Ben Greear <greearb@candelatech.com>, <greearb@agcs.com>
+ *
+ * Fixes:
+ *
+ * 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/if_vlan.h>
+#include "vlan.h"
+#include "vlanproc.h"
+
+
+extern struct Qdisc noqueue_qdisc;
+
+/* Global VLAN variables */
+
+/* Our listing of VLAN group(s) */
+struct vlan_group *p802_1Q_vlan_list = NULL;
+
+static char vlan_fullname[] = "802.1Q VLAN Support";
+static unsigned int vlan_version = 1;
+static unsigned int vlan_release = 2;
+static char vlan_copyright[] = " Ben Greear <greearb@candelatech.com>";
+
+
+/** These may be changed at run-time through IOCTLs */
+unsigned short vlan_name_type = 0; /* determines interface naming scheme */
+unsigned long vlan_bad_proto_recvd = 0; /* Counter for how many NON-VLAN protos we've received on a VLAN. */
+
+
+static struct packet_type vlan_packet_type =
+{
+ type: __constant_htons(ETH_P_8021Q),
+ dev: NULL,
+ func: vlan_skb_recv, /* VLAN receive method */
+ data: NULL, /* Set here '(void *)1' when this code can SHARE SKBs */
+ next: NULL
+};
+
+/* End of global variables definitions. */
+
+
+/*
+ * Function vlan_proto_init (pro)
+ *
+ * Initialize VLAN protocol layer,
+ *
+ */
+static int vlan_proto_init(void);
+static int __init vlan_proto_init(void) {
+
+ int err;
+ printk(VLAN_INF "%s v%u.%u %s\n",
+ vlan_fullname, vlan_version, vlan_release, vlan_copyright);
+
+ /* proc file system initialization */
+ err = vlan_proc_init();
+ if (err < 0) {
+ printk(KERN_ERR __FUNCTION__
+ "%s: can't create entry in proc filesystem!\n",
+ VLAN_NAME);
+ return 1;
+ }
+
+ dev_add_pack(&vlan_packet_type);
+ printk(VLAN_INF "%s Initialization complete.\n", VLAN_NAME);
+ return 0;
+}
+
+/*
+ * Module 'remove' entry point.
+ * o delete /proc/net/router directory and static entries.
+ */
+static void __exit vlan_cleanup_module (void) {
+ dev_remove_pack(&vlan_packet_type);
+ vlan_proc_cleanup();
+}
+
+module_init(vlan_proto_init);
+module_exit(vlan_cleanup_module);
+
+
+/** Will search linearly for now, based on device index. Could
+ * hash, or directly link, this some day. --Ben
+ */
+struct vlan_group* vlan_find_group(int real_dev_ifindex) {
+ struct vlan_group* grp = NULL;
+
+ for (grp = p802_1Q_vlan_list;
+ ((grp != NULL) && (grp->real_dev_ifindex != real_dev_ifindex));
+ grp = grp->next) {
+ ;
+ } /* for */
+
+ return grp;
+}
+
+/* Find the protocol handler. Assumes VID < 0xFFF.
+ */
+struct net_device *find_802_1Q_vlan_dev(struct net_device* real_dev,
+ unsigned short VID) {
+
+ struct vlan_group* grp = vlan_find_group(real_dev->ifindex);
+
+ /* When here, we have found the correct group, if it exists. */
+
+ if (grp) { /* then we found one */
+ return grp->vlan_devices[VID]; /* return the vlan device */
+ }//if
+
+ return NULL;
+}/* find_802_1Q_vlan_client */
+
+
+/** This method will explicitly do a dev_put on the device if do_dev_put
+ * is TRUE. This gets around a difficulty with reference counting, and
+ * the unregister-by-name (below). --Ben
+ */
+int unregister_802_1Q_vlan_dev(int real_dev_ifindex, unsigned short vlan_id,
+ int do_dev_put) {
+ struct vlan_group* grp;
+ struct net_device* dev = NULL;
+
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG __FUNCTION__ ": VID: %i\n", vlan_id);
+#endif
+
+ /* sanity check */
+ if ((vlan_id >= 0xFFF) || (vlan_id <= 0)) {
+ return -EINVAL;
+ }
+
+ grp = vlan_find_group(real_dev_ifindex);
+ /* When here, we have found the correct group, if it exists. */
+
+ 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 */
+ grp->vlan_devices[vlan_id] = NULL;
+
+ /* Take it out of the global list of devices.
+ * NOTE: This deletes dev, don't access it again!!
+ */
+
+ if (do_dev_put) {
+ dev_put(dev);
+ }
+
+ rtnl_lock();
+ unregister_netdevice(dev);
+ rtnl_unlock();
+
+ MOD_DEC_USE_COUNT;
+
+ }/* if */
+ }/* if */
+ return 0;
+}/* unregister vlan device */
+
+
+
+int unregister_802_1Q_vlan_device(const char* vlan_IF_name) {
+ struct net_device* dev = NULL;
+
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG __FUNCTION__ ": unregister VLAN by name, name -:%s:-\n",
+ vlan_IF_name);
+#endif
+
+ dev = dev_get_by_name(vlan_IF_name);
+
+ if (dev && dev->vlan_dev) {
+ return unregister_802_1Q_vlan_dev(dev->vlan_dev->real_dev->ifindex,
+ (unsigned short)(dev->vlan_dev->vlan_id),
+ 1 /* do dev_put */);
+ }
+ else {
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG __FUNCTION__ ": WARNING: Could not find dev\n");
+#endif
+
+ if (dev) {
+ dev_put(dev); /* release it */
+ }
+ return -EINVAL;
+ }
+}/* unregister vlan device */
+
+
+/*
+ TODO: This for modules or something?? --BLG
+
+ EXPORT_SYMBOL(register_802_1Q_vlan_device);
+ EXPORT_SYMBOL(unregister_802_1Q_vlan_device);
+
+*/
+
+/* 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.
+ */
+struct net_device *register_802_1Q_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 */
+ int malloc_size = 0;
+
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG __FUNCTION__ ": if_name -:%s:- vid: %i\n",
+ eth_IF_name, VLAN_ID);
+#endif
+
+ /* find the device relating to eth_IF_name.
+ * TODO: Make sure it's an ethernet device. */
+ real_dev = dev_get_by_name(eth_IF_name);
+
+ if (real_dev != NULL) {
+ /* printk(KERN_ALERT "Found real_dev"); */
+
+ if ((VLAN_ID > 0) && (VLAN_ID < 0xFFF)) {
+
+ /* printk(KERN_ALERT "VID is in range"); */
+
+ if (find_802_1Q_vlan_dev(real_dev, VLAN_ID)) {
+ /* was already registered. */
+ printk(VLAN_DBG __FUNCTION__ ": ALREADY had VLAN registered\n");
+ dev_put(real_dev);
+ return NULL;
+ }
+
+ malloc_size = (sizeof(struct net_device));
+
+ new_dev = (struct net_device*) kmalloc(malloc_size, GFP_KERNEL);
+ VLAN_MEM_DBG("net_device malloc, addr: %p size: %i\n", new_dev, malloc_size);
+
+ if (new_dev != NULL) {
+ /* printk(KERN_ALERT "Got a new device.."); */
+
+ memset(new_dev, 0, malloc_size); /* zero everything out */
+
+ /* set us up to not use a Qdisc, as the underlying Hardware device
+ * can do all the queueing we could want.
+ */
+ new_dev->qdisc_sleeping = &noqueue_qdisc;
+
+ /* Gotta set up the fields for the device. */
+
+
+ switch (vlan_name_type) {
+ case VLAN_NAME_TYPE_RAW_PLUS_VID:
+ /* name will look like: eth1.0005 */
+ sprintf(new_dev->name, "%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 */
+ sprintf(new_dev->name, "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 */
+ sprintf(new_dev->name, "%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:
+ /* default case */
+ sprintf(new_dev->name, "vlan%.4i", VLAN_ID);
+ }/* switch */
+
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name);
+#endif
+ /* set up method calls */
+ new_dev->init = vlan_dev_init;
+ new_dev->destructor = vlan_dev_destruct;
+
+ /* 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;
+
+ /* IFF_BROADCAST|IFF_MULTICAST; ??? */
+ new_dev->flags = real_dev->flags;
+ new_dev->flags &= ~IFF_UP;
+
+ /* need 4 bytes for extra VLAN header info,
+ * hope the underlying device can handle it. */
+ new_dev->mtu = real_dev->mtu;
+ new_dev->change_mtu = vlan_dev_change_mtu;
+
+ new_dev->type = real_dev->type; /* TODO: is this true? */
+
+ /* Regular ethernet + 4 bytes (18 total). */
+ new_dev->hard_header_len = VLAN_HLEN + real_dev->hard_header_len;
+
+ new_dev->priv = kmalloc(sizeof(struct net_device_stats),
+ GFP_KERNEL);
+ VLAN_MEM_DBG("new_dev->priv malloc, addr: %p size: %i\n", new_dev->priv,
+ sizeof(struct net_device_stats));
+
+ if (new_dev->priv) {
+ memset(new_dev->priv, 0, sizeof(struct net_device_stats));
+ }//if
+
+ 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;
+
+ new_dev->open = vlan_dev_open;
+ new_dev->stop = vlan_dev_stop;
+ new_dev->hard_header = vlan_dev_hard_header;
+
+ /* TODO: Deal with the header cache thing some time...maybe
+ * a performance booster??
+ * ?????
+ * new_dev->hard_header_cache = vlan_header_cache;
+ * new_dev->header_cache_update = vlan_header_cache_update;
+ * new_dev->hard_header_cache = vlan_header_cache;
+ * new_dev->header_cache_update = vlan_header_cache_update;
+ */
+
+ 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;
+ new_dev->set_mac_address = vlan_dev_set_mac_address;
+ new_dev->set_multicast_list = vlan_dev_set_multicast_list;
+
+ new_dev->vlan_dev = (struct vlan_dev_info*) kmalloc(sizeof(struct vlan_dev_info),
+ GFP_KERNEL);
+ VLAN_MEM_DBG("new_dev->vlan_dev malloc, addr: %p size: %i\n", new_dev->vlan_dev,
+ sizeof(struct vlan_dev_info));
+ if (new_dev->vlan_dev == NULL) {
+ kfree(new_dev->priv);
+ VLAN_FMEM_DBG("new_dev->priv free, addr: %p\n", new_dev->priv);
+ kfree(new_dev);
+ VLAN_FMEM_DBG("new_dev free, addr: %p\n", new_dev);
+ dev_put(real_dev);
+ return NULL;
+ }
+
+ memset(new_dev->vlan_dev, 0, sizeof(struct vlan_dev_info));
+ new_dev->vlan_dev->vlan_id = VLAN_ID; /* 1 through 0xFFF */
+
+ /* TODO: have to be careful deleting real devices now. */
+ new_dev->vlan_dev->real_dev = real_dev;
+ new_dev->vlan_dev->dent = NULL;
+
+
+ /* So, got the sucker initialized, now lets place
+ * it into our local structure.
+ */
+
+ grp = vlan_find_group(real_dev->ifindex);
+
+ /* When here, we have found the correct group, if it exists. */
+
+ if (!grp) { /* need to add a new group */
+ /* printk(VLAN_DBG "VLAN REGISTER: "
+ "Need to add new vlan group.\n");*/
+
+ grp = kmalloc(sizeof(struct vlan_group), GFP_KERNEL);
+ VLAN_MEM_DBG("grp malloc, addr: %p size: %i\n", grp, sizeof(struct vlan_group));
+
+ if (!grp) {
+ kfree(new_dev->priv);
+ VLAN_FMEM_DBG("new_dev->priv free, addr: %p\n", new_dev->priv);
+ kfree(new_dev);
+ VLAN_FMEM_DBG("new_dev free, addr: %p\n", new_dev);
+ dev_put(real_dev);
+ return NULL;
+ }
+
+ printk(KERN_ALERT "VLAN REGISTER: Allocated new group.\n");
+ memset(grp, 0, sizeof(struct vlan_group));
+ grp->real_dev_ifindex = real_dev->ifindex;
+ grp->next = p802_1Q_vlan_list;
+ p802_1Q_vlan_list = grp;
+ }/* if */
+
+ grp->vlan_devices[VLAN_ID] = new_dev;
+
+ vlan_proc_add_dev(new_dev); /* create it's proc entry */
+
+ /* Now, add it to the global list of devices. */
+ /* printk(KERN_ALERT "Registering new device."); */
+
+ /* TODO: Please check this: RTNL --Ben */
+ rtnl_lock();
+ register_netdevice(new_dev);
+ rtnl_unlock();
+
+ /* NOTE: We have a reference to the real device,
+ * so hold on to the reference.
+ */
+ MOD_INC_USE_COUNT; /* Add was a success!! */
+ return new_dev;
+ }
+ }//if
+ /* If we are here, then something is wrong, so release the real_dev
+ */
+ dev_put(real_dev);
+ }//if we found real_dev
+
+ return NULL;
+}/* register (create) VLAN device */
diff -u -r -N -X /home/greear/exclude.list linux/net/8021q/vlan.h linux.dev/net/8021q/vlan.h
--- linux/net/8021q/vlan.h Wed Dec 31 17:00:00 1969
+++ linux.dev/net/8021q/vlan.h Tue Jun 19 15:27:50 2001
@@ -0,0 +1,41 @@
+#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_ALERT
+#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 __FUNCTION__ ": " x, y, z);
+#define VLAN_FMEM_DBG(x, y) printk(VLAN_DBG __FUNCTION__ ": " x, 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;
+extern unsigned long vlan_bad_proto_recvd; /* Counter for how many NON-VLAN protos we've received on a VLAN. */
+
+
+/* Add some headers for the public VLAN methods. */
+int unregister_802_1Q_vlan_device(const char* vlan_IF_name);
+struct net_device *register_802_1Q_vlan_device(const char* eth_IF_name,
+ unsigned short VID);
+
+#endif
diff -u -r -N -X /home/greear/exclude.list linux/net/8021q/vlan_dev.c linux.dev/net/8021q/vlan_dev.c
--- linux/net/8021q/vlan_dev.c Wed Dec 31 17:00:00 1969
+++ linux.dev/net/8021q/vlan_dev.c Tue Jun 19 14:47:52 2001
@@ -0,0 +1,760 @@
+/* -*- linux-c -*-
+ * INET An implementation of the TCP/IP protocol suite for the LINUX
+ * operating system. INET is implemented using the BSD Socket
+ * interface as the means of communication with the user level.
+ *
+ * Ethernet-type device handling.
+ *
+ * Version: @(#)vlan_dev.c Started 3/29/99
+ *
+ * Authors: Ben Greear <greearb@candelatech.com>, <greearb@agcs.com>
+ *
+ * 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
+ *
+ * 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 <asm/unaligned.h>
+#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>
+
+
+struct net_device_stats* vlan_dev_get_stats(struct net_device* dev) {
+ return (struct net_device_stats*)(dev->priv);
+}
+
+
+/*
+ * 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;
+ }/* switch */
+
+ return 0;
+}/* vlan_dev_rebuild_header */
+
+
+
+/*
+ * 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...
+ *
+ */
+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));
+ vid = (vlan_TCI & 0xFFF);
+
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG __FUNCTION__ ": skb: %p vlan_id: %hx\n",
+ 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. */
+ /* If it's NULL, we will tag it to be junked below */
+ skb->dev = find_802_1Q_vlan_dev(dev, vid);
+
+ if (!skb->dev) {
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG __FUNCTION__ ": ERROR: No net_device for VID: %i on dev: %s [%i]\n",
+ (unsigned int)(vid), dev->name, dev->ifindex);
+#endif
+ kfree_skb(skb);
+ return -1;
+ }
+
+ /* Bump the rx counters for the VLAN device. */
+ stats = (struct net_device_stats*)(skb->dev->priv);
+ 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 != skb->dev->vlan_dev->real_dev) {
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG __FUNCTION__ ": dropping skb: %p because came in on wrong device, dev: %s real_dev: %s, skb_dev: %s\n", skb, dev->name, skb->dev->vlan_dev->real_dev->name, skb->dev->name);
+#endif
+ kfree_skb(skb);
+ stats->rx_errors++;
+ return -1;
+ }
+
+ /*
+ * Deal with ingress priority mapping.
+ */
+ skb->priority = skb->dev->vlan_dev->ingress_priority_map[(ntohs(vhdr->h_vlan_TCI) >> 13) & 0x7];
+
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG __FUNCTION__ ": priority: %lu for TCI: %hu (hbo)\n",
+ (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 :-(
+ 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(skb->mac.ethernet->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);
+ 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...
+ */
+ if (skb->dev->vlan_dev->flags & 1) {
+ /* Lifted from Gleb's VLAN code... */
+ memmove(skb->data - ETH_HLEN, skb->data - VLAN_ETH_HLEN, 12);
+ skb->mac.raw += VLAN_HLEN;
+ }
+ netif_rx(skb);
+ 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...
+ */
+ if (skb->dev->vlan_dev->flags & 1) {
+ /* Lifted from Gleb's VLAN code... */
+ memmove(skb->data - ETH_HLEN, skb->data - VLAN_ETH_HLEN, 12);
+ skb->mac.raw += VLAN_HLEN;
+ }
+
+ netif_rx(skb);
+ 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...
+ */
+ if (skb->dev->vlan_dev->flags & 1) {
+ /* Lifted from Gleb's VLAN code... */
+ memmove(skb->data - ETH_HLEN, skb->data - VLAN_ETH_HLEN, 12);
+ skb->mac.raw += VLAN_HLEN;
+ }
+ netif_rx(skb);
+ 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;
+
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG __FUNCTION__ ": skb: %p type: %hx len: %x vlan_id: %hx, daddr: %p\n",
+ skb, type, len, dev->vlan_dev->vlan_id, daddr);
+#endif
+
+ 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 = dev->vlan_dev->vlan_id;
+ veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb);
+
+ put_unaligned(htons(veth_TCI), &vhdr->h_vlan_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) {
+ put_unaligned(htons(type), &vhdr->h_vlan_encapsulated_proto);
+ }
+ else {
+ put_unaligned(htons(len), &vhdr->h_vlan_encapsulated_proto);
+ }
+
+ /* Before delegating work to the lower layer, enter our MAC-address */
+ if (saddr == NULL) {
+ saddr = dev->dev_addr;
+ }
+
+ /* Now make the underlying real hard header */
+
+ dev = dev->vlan_dev->real_dev;
+ rc = dev->hard_header(skb, dev, ETH_P_8021Q, daddr, saddr, len + VLAN_HLEN);
+
+ if (rc < 0) rc -= VLAN_HLEN;
+ if (rc > 0) rc += VLAN_HLEN;
+ return rc;
+} /* vlan_hard_header, put on the VLAN hardware header */
+
+
+int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) {
+ struct net_device_stats* stats = (struct net_device_stats*)(dev->priv);
+ 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)) {
+ /* This is not a VLAN frame...but we can fix that! */
+ unsigned short veth_TCI = 0;
+ dev->vlan_dev->cnt_encap_on_xmit++;
+
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG __FUNCTION__ ": proto to encap: 0x%hx (hbo)\n", htons(veth->h_vlan_proto));
+#endif
+
+ if (skb_headroom(skb) < VLAN_HLEN) {
+ struct sk_buff* sk_tmp = skb;
+ skb = skb_realloc_headroom(sk_tmp, VLAN_HLEN);
+ kfree_skb(sk_tmp);
+ if (skb == NULL) {
+ stats->tx_dropped++;
+ kfree_skb(sk_tmp);
+ return -ENOMEM;
+ }
+ dev->vlan_dev->cnt_inc_headroom_on_tx++;
+ }
+ else {
+ if( !(skb = skb_unshare(skb, GFP_ATOMIC)) ) {
+ printk(KERN_ERR "vlan: failed to unshare skbuff\n");
+ stats->tx_dropped++;
+ return -ENOMEM;
+ }
+ }
+ veth = (struct vlan_ethhdr*)skb_push(skb, VLAN_HLEN);
+
+ /* Move the mac addresses to the beginning of the new header. */
+ memmove(skb->data, skb->data + VLAN_HLEN, 12);
+
+ /* first, the ethernet type */
+ put_unaligned(__constant_htons(ETH_P_8021Q), &veth->h_vlan_proto);
+
+ /* 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 = dev->vlan_dev->vlan_id;
+ veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb);
+
+ put_unaligned(htons(veth_TCI), &veth->h_vlan_TCI);
+ }/* If we needed to encapsulate the frame */
+
+ skb->dev = dev->vlan_dev->real_dev;
+
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG __FUNCTION__ ": about to send skb: %p to dev: %s\n", 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
+
+ dev_queue_xmit(skb);
+ stats->tx_packets++; /* for statics only */
+ stats->tx_bytes += skb->len;
+ return 0;
+}/* vlan_dev_hard_start_xmit */
+
+
+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?
+ */
+ /* struct net_device *rdev = dev->vlan_dev->real_dev; TODO: Re-add this correctly. */
+
+ dev->mtu = new_mtu;
+
+ /* TODO: Check what our VLAN peer devices have for MTU,
+ * and play coherent result: (largest + VLAN_HDR)
+ * of any of VLANs at the same physical device.
+ *
+ * UGGG!! I think I'd rather get the above fix in before trying
+ * this next bit of code. --BLG
+
+ if (rdev->change_mtu)
+ return rdev->change_mtu(rdev, new_mtu + VLAN_HLEN);
+
+ */
+
+ return new_mtu;
+}
+
+int vlan_dev_open(struct net_device* dev) {
+ if (! dev->vlan_dev->real_dev->flags & IFF_UP) {
+ return -ENETDOWN;
+ }
+
+ dev->flags |= IFF_UP;
+ return 0;
+}
+
+int vlan_dev_stop(struct net_device* dev) {
+ dev->flags &= ~IFF_UP;
+ vlan_flush_mc_list(dev);
+ return 0;
+}
+
+int vlan_dev_init(struct net_device* dev) {
+ /* TODO: figure this out, maybe do nothing?? */
+ return 0;
+}
+
+void vlan_dev_destruct(struct net_device* dev) {
+
+ if (dev) {
+ if (dev->vlan_dev) {
+ dev_put(dev->vlan_dev->real_dev); /* release our reference */
+
+ if (dev->vlan_dev->dent) {
+ printk(KERN_ERR __FUNCTION__ ": dev->vlan_dev->dent is NOT NULL!\n");
+ /* If we ever get here, there is a serious bug that must be fixed. */
+ }
+ kfree(dev->vlan_dev);
+ VLAN_FMEM_DBG("dev->vlan_dev free, addr: %p\n", dev->vlan_dev);
+ dev->vlan_dev = NULL;
+
+ }
+
+ kfree(dev->priv);
+ VLAN_FMEM_DBG("dev->priv free, addr: %p\n", dev->priv);
+ dev->priv = NULL;
+
+ kfree(dev);
+ VLAN_FMEM_DBG("net_device free, addr: %p\n", dev);
+ dev = NULL;
+ }
+ return;
+}
+
+
+/* TODO: Not to sure if the VLAN stuff works here. Need to understand
+ * this better. --BLG
+ */
+/*
+int vlan_dev_header_cache(struct neighbour *neigh, struct hh_cache *hh) {
+ unsigned short type = hh->hh_type;
+ struct vlan_ethhdr *veth = (struct vlan_ethhdr*)(((u8*)hh->hh_data) + 2);
+ struct device *dev = neigh->dev;
+
+ if (type == __constant_htons(ETH_P_802_3)) {
+ return -1;
+ }
+
+ veth->h_vlan_proto = __constant_htons(ETH_P_8021Q);
+ memcpy(veth->h_source, dev->dev_addr, ETH_ALEN);
+ memcpy(veth->h_dest, neigh->ha, ETH_ALEN);
+
+ * VLAN specific attributes. *
+ veth->h_vlan_TCI = htons(dev->VLAN_id); * TODO: Add priority control (high 3 bits.) *
+ veth->h_vlan_encapsulated_proto = type; * should already be in network order *
+
+ return 0;
+}
+*/
+
+/*
+ * Called by Address Resolution module to notify changes in address.
+ */
+/*
+void vlan_dev_header_cache_update(struct hh_cache *hh, struct device *dev,
+ unsigned char * haddr) {
+ memcpy(((u8*)hh->hh_data) + 2, haddr, VLAN_ETH_HLEN);
+}
+*/
+
+
+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->vlan_dev) {
+ /* see if a priority mapping exists.. */
+ dev->vlan_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->vlan_dev) {
+ /* see if a priority mapping exists.. */
+ mp = dev->vlan_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;
+ }
+ }
+ /* create a new mapping then. */
+ mp = dev->vlan_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);
+ dev->vlan_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->vlan_dev) {
+ /* verify flag is supported */
+ if (flag == 1) {
+ if (flag_val) {
+ dev->vlan_dev->flags |= 1;
+ }
+ else {
+ dev->vlan_dev->flags &= ~1;
+ }
+ dev_put(dev);
+ return 0;
+ }
+ else {
+ dev_put(dev);
+ return -EINVAL;
+ }
+ }
+ dev_put(dev);
+ }
+ return -EINVAL;
+}
+
+
+int vlan_dev_set_mac_address(struct net_device *dev, void* addr_struct_p) {
+ int i;
+ struct sockaddr *addr = (struct sockaddr*)(addr_struct_p);
+
+ 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(dev->vlan_dev->real_dev->dev_addr, dev->dev_addr, dev->addr_len) != 0) {
+ if (dev->vlan_dev->real_dev->flags & IFF_PROMISC) {
+ /* Already promiscious...leave it alone. */
+ printk("VLAN (%s): Good, underlying device (%s) is already promiscious.\n",
+ dev->name, dev->vlan_dev->real_dev->name);
+ }
+ else {
+ int flgs = dev->vlan_dev->real_dev->flags;
+ flgs |= IFF_PROMISC;
+ printk("VLAN (%s): Setting underlying device (%s) to promiscious mode.\n",
+ dev->name, dev->vlan_dev->real_dev->name);
+ dev_change_flags(dev->vlan_dev->real_dev, flgs);
+
+ /* Seems like this should work, but it doesn't.
+ dev_set_promiscuity(dev->vlan_dev->real_dev, 1);
+ */
+ }
+ }
+ else {
+ printk("VLAN (%s): Underlying device (%s) has same MAC, not checking promiscious mode.\n",
+ dev->name, dev->vlan_dev->real_dev->name);
+ }
+
+ return 0;
+}
+
+
+/** 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->vlan_dev) {
+ /* Then it's a real vlan device, as far as we can tell.. */
+ real_dev = vlan_dev->vlan_dev->real_dev;
+
+ /* compare the current promiscuity to the last promisc we had.. */
+ inc = vlan_dev->promiscuity - vlan_dev->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->vlan_dev->old_promiscuity = vlan_dev->promiscuity;
+ }
+
+ inc = vlan_dev->allmulti - vlan_dev->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->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->vlan_dev->old_mc_list)) {
+ dev_mc_add(real_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
+ printk(KERN_INFO "%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->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_INFO "%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->vlan_dev);
+ }/* if we were sent a valid device */
+}/* vlan_dev_set_multicast */
+
+
+/** 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.
+ */
+int vlan_should_add_mc(struct dev_mc_list *dmi, struct dev_mc_list *mc_list) {
+ struct dev_mc_list *idmi; /* iterator */
+
+ 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;
+}
+
+
+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_KERNEL);
+ 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;
+ }
+}
+
+void vlan_flush_mc_list(struct net_device *dev) {
+ struct dev_mc_list *dmi = dev->mc_list;
+
+ while (dmi) {
+ dev_mc_delete(dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
+ printk(KERN_INFO "%s: del %.2x:%.2x:%.2x:%.2x:%.2x:%.2x mcast address from master 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]);
+ dmi = dev->mc_list;
+ }
+
+ vlan_destroy_mc_list(dev->mc_list);
+ dev->mc_list = NULL;
+
+ if (dev->vlan_dev) {
+ vlan_destroy_mc_list(dev->vlan_dev->old_mc_list);
+ dev->vlan_dev->old_mc_list = NULL;
+ }
+}/* vlan_flush_mc_list */
diff -u -r -N -X /home/greear/exclude.list linux/net/8021q/vlanproc.c linux.dev/net/8021q/vlanproc.c
--- linux/net/8021q/vlanproc.c Wed Dec 31 17:00:00 1969
+++ linux.dev/net/8021q/vlanproc.c Tue Jun 19 14:47:52 2001
@@ -0,0 +1,604 @@
+/* -*- linux-c -*-
+******************************************************************************
+* 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/stddef.h> /* offsetof(), etc. */
+#include <linux/errno.h> /* return codes */
+#include <linux/kernel.h>
+#include <linux/malloc.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/segment.h> /* kernel <-> user copy */
+#include <asm/byteorder.h> /* htons(), etc. */
+#include <asm/uaccess.h> /* copy_to_user */
+#include <asm/io.h>
+#include <linux/proc_fs.h>
+#include <linux/fs.h>
+#include <linux/netdevice.h>
+#include <linux/if_vlan.h>
+#include "vlanproc.h"
+#include "vlan.h"
+
+/****** Defines and Macros **************************************************/
+
+#ifndef min
+#define min(a,b) (((a)<(b))?(a):(b))
+#endif
+#ifndef max
+#define max(a,b) (((a)>(b))?(a):(b))
+#endif
+
+
+/****** Function Prototypes *************************************************/
+
+#ifdef CONFIG_PROC_FS
+
+/* Proc filesystem interface */
+static ssize_t vlan_proc_read(struct file* file, char* buf, size_t count,
+ loff_t *ppos);
+
+/* Methods for preparing data for reading proc entries */
+
+static int vlan_config_get_info(char* buf, char** start, off_t offs, int len);
+static int vlandev_get_info(char* buf, char** start, off_t offs, int len);
+
+
+/* Miscellaneous */
+
+/*
+ * Global Data
+ */
+
+/*
+ * Names of the proc directory entries
+ */
+
+static char name_root[] = "vlan";
+static char name_conf[] = "config";
+static char term_msg[] = "***KERNEL: Out of buffer space!***\n";
+
+
+/*
+ * VLAN device IOCTL.
+ * o execute requested action or pass command to the device driver
+ */
+
+int vlan_proc_ioctl(
+ struct inode* inode,
+ struct file* file,
+ unsigned int cmd,
+ unsigned long arg
+ ) {
+ int err = 0;
+ struct vlan_ioctl_args args;
+
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG __FUNCTION__ ": cmd: %x\n", cmd);
+#endif
+
+ /* everything here needs root permissions, except aguably the
+ * hack ioctls for sending packets. However, I know _I_ don't
+ * want users running that on my network! --BLG
+ */
+ if (!capable(CAP_NET_ADMIN)){
+ return -EPERM;
+ }
+
+ if ((cmd >> 8) != VLAN_IOCTL) {
+ printk(VLAN_DBG __FUNCTION__ ": Not a VLAN IOCTL: %x \n", cmd);
+ return -EINVAL;
+ }
+
+ if (copy_from_user(&args, (void*)arg,
+ sizeof(struct vlan_ioctl_args)))
+ return -EFAULT;
+
+ /* Null terminate this sucker, just in case. */
+ args.dev1[23] = 0;
+ args.u.dev2[23] = 0;
+
+ switch (cmd) {
+ case SET_INGRESS_PRIORITY_IOCTL:
+ err = vlan_dev_set_ingress_priority(args.dev1, args.u.skb_priority, args.vlan_qos);
+ break;
+
+ case SET_EGRESS_PRIORITY_IOCTL:
+ err = vlan_dev_set_egress_priority(args.dev1, args.u.skb_priority, args.vlan_qos);
+ break;
+
+ case SET_VLAN_FLAG_IOCTL:
+ err = vlan_dev_set_vlan_flag(args.dev1, args.u.flag, args.vlan_qos);
+ break;
+
+ case SET_NAME_TYPE_IOCTL:
+ if ((args.u.name_type >= 0) && (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
+ vlan_name_type = args.u.name_type;
+ /* printk(VLAN_INF "VLAN_SET_NAME_TYPE: new type: %i\n", (int)(args.u.name_type)); */
+ err = 0;
+ }
+ else {
+ /* printk(VLAN_INF "VLAN_SET_NAME_TYPE, type: %i is invalid.\n", (int)(args.u.name_type)); */
+ err = -EINVAL;
+ }
+ break;
+
+ /* TODO: Figure out how to pass info back...
+ case GET_INGRESS_PRIORITY_IOCTL:
+ err = vlan_dev_get_ingress_priority(args);
+ break;
+
+ case GET_EGRESS_PRIORITY_IOCTL:
+ err = vlan_dev_get_egress_priority(args);
+ break;
+ */
+
+ case ADD_VLAN_IOCTL:
+ /* 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_802_1Q_vlan_device(args.dev1, args.u.VID)) {
+ err = 0;
+ } else {
+ err = -EINVAL;
+ }
+ break;
+
+ case DEL_VLAN_IOCTL:
+ /* Here, the args.dev1 is the actual VLAN we want
+ * to get rid of.
+ */
+ err = unregister_802_1Q_vlan_device(args.dev1);
+ break;
+
+ default:
+ /* pass on to underlying device instead?? */
+ printk(VLAN_DBG __FUNCTION__ ": Unknown VLAN IOCTL: %x \n",
+ cmd);
+ return -EINVAL;
+ }
+
+ return err;
+}
+
+/*
+ * 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 file_operations vlan_fops = {
+ read: vlan_proc_read,
+ ioctl: vlan_proc_ioctl,
+};
+
+/*
+ * /proc/net/vlan/<device> file and inode operations
+ */
+
+static struct file_operations vlandev_fops = {
+ read: vlan_proc_read,
+ ioctl: vlan_proc_ioctl,
+};
+
+
+/*
+ * Proc filesystem derectory entries.
+ */
+
+/*
+ * /proc/net/vlan
+ */
+
+static struct proc_dir_entry* proc_vlan_dir = NULL;
+
+/*
+ * /proc/net/vlan/config
+ */
+
+static struct proc_dir_entry* proc_vlan_conf = NULL;
+
+
+/* Strings */
+static char conf_hdr[] = "VLAN Dev name | VLAN ID\n";
+
+
+/*
+ * Interface functions
+ */
+
+/*
+ * Clean up /proc/net/vlan entries
+ */
+
+void __exit 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);
+ /* TODO: Take care of dynamically added entries??
+ * Probably only a problem if we ever become a module though..
+ */
+}
+
+/*
+ * 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;
+ proc_vlan_conf->get_info = vlan_config_get_info;
+ return 0;
+ }
+ }
+ vlan_proc_cleanup();
+ return -ENOBUFS;
+}
+
+/*
+ * Add directory entry for VLAN device.
+ */
+
+int vlan_proc_add_dev (struct net_device* vlandev)
+{
+ if (!vlandev->vlan_dev) {
+ printk(KERN_ERR
+ "ERROR: vlan_proc_add, device -:%s:- is NOT a VLAN\n",
+ vlandev->name);
+ return -EINVAL;
+ }
+
+ vlandev->vlan_dev->dent = create_proc_entry(vlandev->name,
+ S_IFREG|S_IRUSR|S_IWUSR,
+ proc_vlan_dir);
+ if (!vlandev->vlan_dev->dent) {
+ return -ENOBUFS;
+ }
+
+ vlandev->vlan_dev->dent->proc_fops = &vlandev_fops;
+ vlandev->vlan_dev->dent->get_info = &vlandev_get_info;
+ vlandev->vlan_dev->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 || !vlandev->vlan_dev) {
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG __FUNCTION__ ": invalid argument: %p\n",
+ vlandev);
+#endif
+ return -EINVAL;
+ }
+
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG __FUNCTION__ ": dev: %p\n", vlandev);
+#endif
+
+ /** NOTE: This will consume the memory pointed to by dent, it seems. */
+ remove_proc_entry(vlandev->name, proc_vlan_dir);
+ vlandev->vlan_dev->dent = NULL;
+
+ return 0;
+}
+
+
+/****** Proc filesystem entry points ****************************************/
+
+/*
+ * Read VLAN proc directory entry.
+ * This is universal routine for reading all entries in /proc/net/vlan
+ * directory. Each directory entry contains a pointer to the 'method' for
+ * preparing data for that entry.
+ * o verify arguments
+ * o allocate kernel buffer
+ * o call get_info() to prepare data
+ * o copy data to user space
+ * o release kernel buffer
+ *
+ * Return: number of bytes copied to user space (0, if no data)
+ * <0 error
+ */
+static ssize_t vlan_proc_read(
+ struct file* file,
+ char* buf,
+ size_t count,
+ loff_t *ppos
+ ) {
+ struct inode *inode = file->f_dentry->d_inode;
+ struct proc_dir_entry* dent;
+ char* page;
+ int pos, offs, len;
+
+ if (count <= 0)
+ return 0;
+
+ dent = inode->u.generic_ip;
+ if ((dent == NULL) || (dent->get_info == NULL))
+ return 0;
+
+ page = kmalloc(VLAN_PROC_BUFSZ, GFP_KERNEL);
+ VLAN_MEM_DBG("page malloc, addr: %p size: %i\n",
+ page, VLAN_PROC_BUFSZ);
+
+ if (page == NULL)
+ return -ENOBUFS;
+
+ pos = dent->get_info(page, dent->data, 0, 0);
+ offs = file->f_pos;
+ if (offs < pos) {
+ len = min(pos - offs, count);
+ if (copy_to_user(buf, (page + offs), len)) {
+ return -EFAULT;
+ }
+ file->f_pos += len;
+ } else {
+ len = 0;
+ }
+
+ kfree(page);
+ VLAN_FMEM_DBG("page free, addr: %p\n", page);
+ return len;
+}/* vlan_proc_read */
+
+/*
+ * The following few functions build the content of /proc/net/vlan/config
+ */
+
+static int vlan_proc_get_vlan_info(char* buf, unsigned int cnt) {
+ struct net_device* vlandev = NULL;
+ struct vlan_group* grp = NULL;
+ int i = 0;
+ char* nm_type = NULL;
+
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG __FUNCTION__ ": cnt == %i\n", cnt);
+#endif
+
+ if (vlan_name_type == VLAN_NAME_TYPE_RAW_PLUS_VID) {
+ nm_type = "VLAN_NAME_TYPE_RAW_PLUS_VID";
+ }
+ else if (vlan_name_type == VLAN_NAME_TYPE_PLUS_VID_NO_PAD) {
+ nm_type = "VLAN_NAME_TYPE_PLUS_VID_NO_PAD";
+ }
+ else if (vlan_name_type == VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD) {
+ nm_type = "VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD";
+ }
+ else if (vlan_name_type == VLAN_NAME_TYPE_PLUS_VID) {
+ nm_type = "VLAN_NAME_TYPE_PLUS_VID";
+ }
+ else {
+ nm_type = "UNKNOWN";
+ }
+
+ cnt += sprintf(buf + cnt, "Name-Type: %s bad_proto_recvd: %lu\n",
+ nm_type, vlan_bad_proto_recvd);
+
+ for (grp = p802_1Q_vlan_list; grp != NULL; grp = grp->next) {
+ /* loop through all devices for this device */
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG __FUNCTION__ ": found a group, addr: %p\n",grp);
+#endif
+ for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
+ vlandev = grp->vlan_devices[i];
+ if (!vlandev)
+ continue;
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG __FUNCTION__
+ ": found a vlan_dev, addr: %p\n", vlandev);
+#endif
+ if ((cnt + 100) > VLAN_PROC_BUFSZ) {
+ if ((cnt+strlen(term_msg)) < VLAN_PROC_BUFSZ) {
+ cnt += sprintf(buf+cnt, "%s", term_msg);
+ }
+ return cnt;
+ }
+ if (!vlandev->vlan_dev) {
+ printk(KERN_ERR __FUNCTION__
+ ": ERROR: vlandev->vlan_dev is NULL\n");
+ continue;
+ }
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG __FUNCTION__
+ ": got a good vlandev, addr: %p\n",
+ vlandev->vlan_dev);
+#endif
+ cnt += sprintf(buf + cnt, "%-15s| %d | %s\n",
+ vlandev->name, vlandev->vlan_dev->vlan_id, vlandev->vlan_dev->real_dev->name);
+ }
+ }
+ return cnt;
+}
+
+/*
+ * Prepare data for reading 'Config' entry.
+ * Return length of data.
+ */
+
+static int vlan_config_get_info(
+ char* buf,
+ char** start,
+ off_t offs,
+ int len
+ ) {
+ strcpy(buf, conf_hdr);
+ return vlan_proc_get_vlan_info(buf, (unsigned int)(strlen(conf_hdr)));
+}
+
+
+/*
+ * Prepare data for reading <device> entry.
+ * Return length of data.
+ *
+ * On entry, the 'start' argument will contain a pointer to VLAN device
+ * data space.
+ */
+
+static int vlandev_get_info(
+ char* buf,
+ char** start,
+ off_t offs,
+ int len
+ ) {
+ struct net_device* vlandev = (void*)start;
+ struct net_device_stats* stats;
+ int cnt = 0;
+ struct vlan_priority_tci_mapping* mp;
+ int i;
+
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG __FUNCTION__ ": vlandev: %p\n", vlandev);
+#endif
+
+ if ((vlandev == NULL) || (!vlandev->vlan_dev)) {
+ return 0;
+ }
+
+ cnt += sprintf(buf + cnt, "%s VID: %d REORDER_HDR: %i\n",
+ vlandev->name, vlandev->vlan_dev->vlan_id,
+ (int)(vlandev->vlan_dev->flags & 1));
+ stats = (struct net_device_stats*)(vlandev->priv);
+
+ cnt += sprintf(buf + cnt, "%30s: %12lu\n",
+ "total frames received", stats->rx_packets);
+
+ cnt += sprintf(buf + cnt, "%30s: %12lu\n",
+ "total bytes received", stats->rx_bytes);
+
+ cnt += sprintf(buf + cnt, "%30s: %12lu\n",
+ "Broadcast/Multicast Rcvd", stats->multicast);
+
+ cnt += sprintf(buf + cnt, "\n%30s: %12lu\n",
+ "total frames transmitted", stats->tx_packets);
+
+ cnt += sprintf(buf + cnt, "%30s: %12lu\n",
+ "total bytes transmitted", stats->tx_bytes);
+
+ cnt += sprintf(buf + cnt, "%30s: %12lu\n",
+ "total headroom inc", vlandev->vlan_dev->cnt_inc_headroom_on_tx);
+
+ cnt += sprintf(buf + cnt, "%30s: %12lu\n",
+ "total encap on xmit", vlandev->vlan_dev->cnt_encap_on_xmit);
+
+ cnt += sprintf(buf + cnt, "Device: %s", vlandev->vlan_dev->real_dev->name);
+
+
+ /* now show all PRIORITY mappings relating to this VLAN */
+ cnt += sprintf(buf + cnt, "\nINGRESS priority mappings: 0:%lu 1:%lu 2:%lu 3:%lu 4:%lu 5:%lu 6:%lu 7:%lu\n",
+ vlandev->vlan_dev->ingress_priority_map[0],
+ vlandev->vlan_dev->ingress_priority_map[1],
+ vlandev->vlan_dev->ingress_priority_map[2],
+ vlandev->vlan_dev->ingress_priority_map[3],
+ vlandev->vlan_dev->ingress_priority_map[4],
+ vlandev->vlan_dev->ingress_priority_map[5],
+ vlandev->vlan_dev->ingress_priority_map[6],
+ vlandev->vlan_dev->ingress_priority_map[7]);
+
+ if ((cnt + 100) > VLAN_PROC_BUFSZ) {
+ if ((cnt + strlen(term_msg)) >= VLAN_PROC_BUFSZ) {
+ /* should never get here */
+ return cnt;
+ }
+ else {
+ cnt += sprintf(buf + cnt, "%s", term_msg);
+ return cnt;
+ }
+ }/* if running out of buffer space */
+
+ cnt += sprintf(buf + cnt, "EGRESSS priority Mappings: ");
+
+ for (i = 0; i<16; i++) {
+ mp = vlandev->vlan_dev->egress_priority_map[i];
+ while (mp) {
+ cnt += sprintf(buf + cnt, "%lu:%hu ", mp->priority, ((mp->vlan_qos >> 13) & 0x7));
+
+ if ((cnt + 100) > VLAN_PROC_BUFSZ) {
+ if ((cnt + strlen(term_msg)) >= VLAN_PROC_BUFSZ) {
+ /* should never get here */
+ return cnt;
+ }
+ else {
+ cnt += sprintf(buf + cnt, "%s", term_msg);
+ return cnt;
+ }
+ }/* if running out of buffer space */
+ mp = mp->next;
+ }
+ }/* for */
+
+ cnt += sprintf(buf + cnt, "\n");
+
+ return cnt;
+}
+
+
+/*
+ * End
+ */
+
+#else /* No CONFIG_PROC_FS */
+
+/*
+ * No /proc - output stubs
+ */
+
+int __init vlan_proc_init (void)
+{
+ return 0;
+}
+
+void __exit vlan_proc_cleanup(void)
+{
+ return;
+}
+
+
+int vlan_proc_add_dev(struct net_device *vlandev)
+{
+ return 0;
+}
+
+int vlan_proc_rem_dev(struct net_device *vlandev)
+{
+ return 0;
+}
+
+#endif /* No CONFIG_PROC_FS */
diff -u -r -N -X /home/greear/exclude.list linux/net/8021q/vlanproc.h linux.dev/net/8021q/vlanproc.h
--- linux/net/8021q/vlanproc.h Wed Dec 31 17:00:00 1969
+++ linux.dev/net/8021q/vlanproc.h Tue Jun 19 14:47:52 2001
@@ -0,0 +1,27 @@
+
+#ifndef __BEN_VLAN_PROC_INC__
+#define __BEN_VLAN_PROC_INC__
+
+
+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);
+
+
+#define VLAN_PROC_BUFSZ (4096) /* buffer size for printing proc info */
+
+/****** Data Types **********************************************************/
+
+/*
+typedef struct vlan_stat_entry {
+ struct vlan_stat_entry * next;
+ char *description; * description string *
+ void *data; * -> data *
+ unsigned data_type; * data type *
+} vlan_stat_entry_t;
+*/
+
+
+#endif
diff -u -r -N -X /home/greear/exclude.list linux/net/Config.in linux.dev/net/Config.in
--- linux/net/Config.in Tue Mar 6 23:44:15 2001
+++ linux.dev/net/Config.in Tue Jun 19 14:47:52 2001
@@ -46,6 +46,9 @@
tristate ' Multi-Protocol Over ATM (MPOA) support' CONFIG_ATM_MPOA
fi
fi
+
+ tristate '802.1Q VLAN Support (EXPERIMENTAL)' CONFIG_VLAN_8021Q
+
fi

comment ' '
diff -u -r -N -X /home/greear/exclude.list linux/net/Makefile linux.dev/net/Makefile
--- linux/net/Makefile Tue Jun 19 14:47:34 2001
+++ linux.dev/net/Makefile Tue Jun 19 14:47:52 2001
@@ -45,6 +45,7 @@
subdir-$(CONFIG_ATM) += atm
subdir-$(CONFIG_DECNET) += decnet
subdir-$(CONFIG_ECONET) += econet
+subdir-$(CONFIG_VLAN_8021Q) += 8021q


obj-y := socket.o $(join $(subdir-y), $(patsubst %,/%.o,$(notdir $(subdir-y))))
diff -u -r -N -X /home/greear/exclude.list linux/net/core/dev.c linux.dev/net/core/dev.c
--- linux/net/core/dev.c Tue Jun 19 14:47:34 2001
+++ linux.dev/net/core/dev.c Tue Jun 19 14:53:40 2001
@@ -1,4 +1,4 @@
-/*
+/* -*- linux-c -*-
* NET3 Protocol independent device support routines.
*
* This program is free software; you can redistribute it and/or
@@ -103,6 +103,7 @@
extern int plip_init(void);
#endif

+
/* This define, if set, will randomly drop a packet when congestion
* is more than moderate. It helps fairness in the multi-interface
* case when one of them is a hog, but it kills performance for the
@@ -133,9 +134,17 @@
* and the routines to invoke.
*
* Why 16. Because with 16 the only overlap we get on a hash of the
- * low nibble of the protocol value is RARP/SNAP/X.25.
+ * low nibble of the protocol value is RARP/SNAP/X.25.
+ *
+ * NOTE: That is no longer true with the addition of VLAN tags. Not
+ * sure which should go first, but I bet it won't make much
+ * difference if we are running VLANs. The good news is that
+ * this protocol won't be in the list unless compiled in, so
+ * the average user (w/out VLANs) will not be adversly affected.
+ * --BLG
*
* 0800 IP
+ * 8100 802.1Q VLAN
* 0001 802.3
* 0002 AX.25
* 0004 802.2
diff -u -r -N -X /home/greear/exclude.list linux/net/ethernet/eth.c linux.dev/net/ethernet/eth.c
--- linux/net/ethernet/eth.c Fri Mar 2 12:02:15 2001
+++ linux.dev/net/ethernet/eth.c Tue Jun 19 14:47:52 2001
@@ -82,7 +82,7 @@
* in here instead. It is up to the 802.2 layer to carry protocol information.
*/

- if(type!=ETH_P_802_3)
+ if (type != ETH_P_802_3)
eth->h_proto = htons(type);
else
eth->h_proto = htons(len);
@@ -92,9 +92,9 @@
*/

if(saddr)
- memcpy(eth->h_source,saddr,dev->addr_len);
+ memcpy(eth->h_source, saddr, dev->addr_len);
else
- memcpy(eth->h_source,dev->dev_addr,dev->addr_len);
+ memcpy(eth->h_source, dev->dev_addr, dev->addr_len);

/*
* Anyway, the loopback-device should never use this function...
@@ -159,11 +159,12 @@
{
struct ethhdr *eth;
unsigned char *rawp;
-
- skb->mac.raw=skb->data;
- skb_pull(skb,dev->hard_header_len);
- eth= skb->mac.ethernet;
-
+
+ skb->mac.raw = skb->data;
+ skb_pull(skb, dev->hard_header_len);
+ eth = skb->mac.ethernet;
+
+
if(*eth->h_dest&1)
{
if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0)
@@ -198,12 +199,12 @@
* won't work for fault tolerant netware but does for the rest.
*/
if (*(unsigned short *)rawp == 0xFFFF)
- return htons(ETH_P_802_3);
+ return __constant_htons(ETH_P_802_3);

/*
* Real 802.2 LLC
*/
- return htons(ETH_P_802_2);
+ return __constant_htons(ETH_P_802_2);
}

int eth_header_parse(struct sk_buff *skb, unsigned char *haddr)
diff -u -r -N -X /home/greear/exclude.list linux/net/netsyms.c linux.dev/net/netsyms.c
--- linux/net/netsyms.c Fri Apr 27 14:15:01 2001
+++ linux.dev/net/netsyms.c Tue Jun 19 14:47:52 2001
@@ -211,6 +211,15 @@
EXPORT_SYMBOL(destroy_EII_client);
#endif

+
+/* for 801q VLAN support */
+#ifdef CONFIG_VLAN_8021Q_MODULE
+EXPORT_SYMBOL(dev_change_flags);
+#endif
+
+
+
+
EXPORT_SYMBOL(sklist_destroy_socket);
EXPORT_SYMBOL(sklist_insert_socket);

@@ -521,6 +530,8 @@
EXPORT_SYMBOL(qdisc_restart);
EXPORT_SYMBOL(qdisc_create_dflt);
EXPORT_SYMBOL(noop_qdisc);
+extern struct Qdisc noqueue_qdisc;
+EXPORT_SYMBOL(noqueue_qdisc);
EXPORT_SYMBOL(qdisc_tree_lock);
#ifdef CONFIG_NET_SCHED
PSCHED_EXPORTLIST;[unhandled content-type:application/x-perl]
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