diff options
Diffstat (limited to 'kernel/net/8021q/vlanproc.c')
| -rw-r--r-- | kernel/net/8021q/vlanproc.c | 326 |
1 files changed, 326 insertions, 0 deletions
diff --git a/kernel/net/8021q/vlanproc.c b/kernel/net/8021q/vlanproc.c new file mode 100644 index 000000000..ae63cf72a --- /dev/null +++ b/kernel/net/8021q/vlanproc.c @@ -0,0 +1,326 @@ +/****************************************************************************** + * 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 + *****************************************************************************/ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#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 following + * 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_DATA(inode)); +} + +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 directory 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) + remove_proc_entry(name_root, net->proc_net); + + /* 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 __net_init 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("can't create entry in proc filesystem!\n"); + vlan_proc_cleanup(net); + return -ENOBUFS; +} + +/* + * Add directory entry for VLAN device. + */ + +int vlan_proc_add_dev(struct net_device *vlandev) +{ + struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); + struct vlan_net *vn = net_generic(dev_net(vlandev), vlan_net_id); + + if (!strcmp(vlandev->name, name_conf)) + return -EINVAL; + vlan->dent = + proc_create_data(vlandev->name, S_IFREG|S_IRUSR|S_IWUSR, + vn->proc_vlan_dir, &vlandev_fops, vlandev); + if (!vlan->dent) + return -ENOBUFS; + return 0; +} + +/* + * Delete directory entry for VLAN device. + */ +int vlan_proc_rem_dev(struct net_device *vlandev) +{ + /** NOTE: This will consume the memory pointed to by dent, it seems. */ + proc_remove(vlan_dev_priv(vlandev)->dent); + vlan_dev_priv(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 = 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_priv *vlan = vlan_dev_priv(vlandev); + + seq_printf(seq, "%-15s| %d | %s\n", vlandev->name, + vlan->vlan_id, vlan->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_priv *vlan = vlan_dev_priv(vlandev); + struct rtnl_link_stats64 temp; + const struct rtnl_link_stats64 *stats; + static const char fmt64[] = "%30s %12llu\n"; + int i; + + if (!is_vlan_dev(vlandev)) + return 0; + + stats = dev_get_stats(vlandev, &temp); + seq_printf(seq, + "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n", + vlandev->name, vlan->vlan_id, + (int)(vlan->flags & 1), vlandev->priv_flags); + + seq_printf(seq, fmt64, "total frames received", stats->rx_packets); + seq_printf(seq, fmt64, "total bytes received", stats->rx_bytes); + seq_printf(seq, fmt64, "Broadcast/Multicast Rcvd", stats->multicast); + seq_puts(seq, "\n"); + seq_printf(seq, fmt64, "total frames transmitted", stats->tx_packets); + seq_printf(seq, fmt64, "total bytes transmitted", stats->tx_bytes); + seq_printf(seq, "Device: %s", vlan->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", + vlan->ingress_priority_map[0], + vlan->ingress_priority_map[1], + vlan->ingress_priority_map[2], + vlan->ingress_priority_map[3], + vlan->ingress_priority_map[4], + vlan->ingress_priority_map[5], + vlan->ingress_priority_map[6], + vlan->ingress_priority_map[7]); + + seq_printf(seq, " EGRESS priority mappings: "); + for (i = 0; i < 16; i++) { + const struct vlan_priority_tci_mapping *mp + = vlan->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; +} |