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-rw-r--r--net/8021q/vlanproc.c357
1 files changed, 357 insertions, 0 deletions
diff --git a/net/8021q/vlanproc.c b/net/8021q/vlanproc.c
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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/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;
+}
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