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-rw-r--r--net/8021q/vlanproc.c291
1 files changed, 291 insertions, 0 deletions
diff --git a/net/8021q/vlanproc.c b/net/8021q/vlanproc.c
new file mode 100644
index 000000000..ec87dea23
--- /dev/null
+++ b/net/8021q/vlanproc.c
@@ -0,0 +1,291 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/******************************************************************************
+ * 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
+ *
+ * ============================================================================
+ * 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,
+};
+
+/*
+ * 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_net(name_conf, S_IFREG | 0600,
+ vn->proc_vlan_dir, &vlan_seq_ops,
+ sizeof(struct seq_net_private));
+ 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_single_data(vlandev->name, S_IFREG | 0600,
+ vn->proc_vlan_dir, vlandev_seq_show, vlandev);
+ if (!vlan->dent)
+ return -ENOBUFS;
+ return 0;
+}
+
+/*
+ * Delete directory entry for VLAN device.
+ */
+void 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;
+}
+
+/****** 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;
+}
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