/****************************************************************************** * 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 <net/net_namespace.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 const 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 const 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 const 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(&init_net, 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, init_net.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 */ static inline int is_vlan_dev(struct net_device *dev) { return dev->priv_flags & IFF_802_1Q_VLAN; } /* 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_each_netdev(&init_net, dev) { if (!is_vlan_dev(dev)) continue; if (i++ == *pos) return dev; } return NULL; } static void *vlan_seq_next(struct seq_file *seq, void *v, loff_t *pos) { struct net_device *dev; ++*pos; dev = (struct net_device *)v; if (v == SEQ_START_TOKEN) dev = net_device_entry(&init_net.dev_base_head); for_each_netdev_continue(&init_net, dev) { if (!is_vlan_dev(dev)) continue; return dev; } return NULL; } 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->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:%u 1:%u 2:%u 3:%u 4:%u 5:%u 6:%u 7:%u\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, "%u:%hu ", mp->priority, ((mp->vlan_qos >> 13) & 0x7)); mp = mp->next; } } seq_puts(seq, "\n"); return 0; }