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/******************************************************************************
* 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/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/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"
/****** 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";
/*
* 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: NULL, /* vlan_proc_ioctl */
};
/*
* /proc/net/vlan/<device> file and inode operations
*/
static struct file_operations vlandev_fops = {
read: vlan_proc_read,
ioctl: NULL, /* vlan_proc_ioctl */
};
/*
* 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 char conf_hdr[] = "VLAN Dev name | VLAN ID\n";
/*
* 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;
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)
{
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->get_info = &vlandev_get_info;
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 __FUNCTION__ ": invalid argument: %p\n",
vlandev);
return -EINVAL;
}
if (!(vlandev->priv_flags & IFF_802_1Q_VLAN)) {
printk(VLAN_DBG __FUNCTION__ ": invalid argument, device: %s is not a VLAN device, priv_flags: 0x%4hX.\n",
vlandev->name, vlandev->priv_flags);
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(VLAN_DEV_INFO(vlandev)->dent->name, proc_vlan_dir);
VLAN_DEV_INFO(vlandev)->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_t(int, 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;
}
/*
* 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;
struct vlan_dev_info *dev_info = 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->priv) {
printk(KERN_ERR __FUNCTION__
": ERROR: vlandev->priv is NULL\n");
continue;
}
dev_info = VLAN_DEV_INFO(vlandev);
#ifdef VLAN_DEBUG
printk(VLAN_DBG __FUNCTION__
": got a good vlandev, addr: %p\n",
VLAN_DEV_INFO(vlandev));
#endif
cnt += sprintf(buf + cnt, "%-15s| %d | %s\n",
vlandev->name, dev_info->vlan_id,
dev_info->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 = NULL;
struct vlan_dev_info *dev_info = NULL;
struct vlan_priority_tci_mapping *mp;
int cnt = 0;
int i;
#ifdef VLAN_DEBUG
printk(VLAN_DBG __FUNCTION__ ": vlandev: %p\n", vlandev);
#endif
if ((vlandev == NULL) || (!vlandev->priv_flags & IFF_802_1Q_VLAN))
return 0;
dev_info = VLAN_DEV_INFO(vlandev);
cnt += sprintf(buf + cnt, "%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);
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", dev_info->cnt_inc_headroom_on_tx);
cnt += sprintf(buf + cnt, "%30s: %12lu\n",
"total encap on xmit", dev_info->cnt_encap_on_xmit);
cnt += sprintf(buf + cnt, "Device: %s", dev_info->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",
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]);
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;
}
}
cnt += sprintf(buf + cnt, "EGRESSS priority Mappings: ");
for (i = 0; i<16; i++) {
mp = dev_info->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;
}
}
mp = mp->next;
}
}
cnt += sprintf(buf + cnt, "\n");
return cnt;
}
#else /* No CONFIG_PROC_FS */
/*
* No /proc - output stubs
*/
int __init vlan_proc_init (void)
{
return 0;
}
void 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 */
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