/****************************************************************************** * 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/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>#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;}