/****************************************************************************** * 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/errno.h> #include <linux/kernel.h> #include <linux/string.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 <net/netns/generic.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_net(inode, file, &vlan_seq_ops, sizeof(struct seq_net_private)); } static const struct file_operations vlan_fops = { .owner = THIS_MODULE, .open = vlan_seq_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release_net, }; /* * /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. */ /* Strings */ static const char *const 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(struct net *net) { struct vlan_net *vn = net_generic(net, vlan_net_id); if (vn->proc_vlan_conf) remove_proc_entry(name_conf, vn->proc_vlan_dir); if (vn->proc_vlan_dir) proc_net_remove(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 vlan_proc_init(struct net *net) { struct vlan_net *vn = net_generic(net, vlan_net_id); vn->proc_vlan_dir = proc_net_mkdir(net, name_root, net->proc_net); if (!vn->proc_vlan_dir) goto err; vn->proc_vlan_conf = proc_create(name_conf, S_IFREG|S_IRUSR|S_IWUSR, vn->proc_vlan_dir, &vlan_fops); if (!vn->proc_vlan_conf) goto err; return 0; err: pr_err("%s: can't create entry in proc filesystem!\n", __func__); vlan_proc_cleanup(net); 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); struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id); dev_info->dent = proc_create_data(vlandev->name, S_IFREG|S_IRUSR|S_IWUSR, vn->proc_vlan_dir, &vlandev_fops, vlandev); if (!dev_info->dent) return -ENOBUFS; return 0; } /* * Delete directory entry for VLAN device. */ int vlan_proc_rem_dev(struct net_device *vlandev) { struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id); /** 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, vn->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 */ /* start read of /proc/net/vlan/config */ static void *vlan_seq_start(struct seq_file *seq, loff_t *pos) __acquires(rcu) { struct net_device *dev; struct net *net = seq_file_net(seq); loff_t i = 1; rcu_read_lock(); if (*pos == 0) return SEQ_START_TOKEN; for_each_netdev_rcu(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; struct net *net = seq_file_net(seq); ++*pos; dev = (struct net_device *)v; if (v == SEQ_START_TOKEN) dev = net_device_entry(&net->dev_base_head); for_each_netdev_continue_rcu(net, dev) { if (!is_vlan_dev(dev)) continue; return dev; } return NULL; } static void vlan_seq_stop(struct seq_file *seq, void *v) __releases(rcu) { rcu_read_unlock(); } static int vlan_seq_show(struct seq_file *seq, void *v) { struct net *net = seq_file_net(seq); struct vlan_net *vn = net_generic(net, vlan_net_id); if (v == SEQ_START_TOKEN) { const char *nmtype = NULL; seq_puts(seq, "VLAN Dev name | VLAN ID\n"); if (vn->name_type < ARRAY_SIZE(vlan_name_type_str)) nmtype = vlan_name_type_str[vn->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); const struct net_device_stats *stats; static const char fmt[] = "%30s %12lu\n"; int i; if (!is_vlan_dev(vlandev)) return 0; stats = dev_get_stats(vlandev); 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); 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, " EGRESS 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; }