patch-2.4.14 linux/net/8021q/vlanproc.c

• Lines: 482
• Date: Tue Oct 30 15:08:12 2001
• Orig file: v2.4.13/linux/net/8021q/vlanproc.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.13/linux/net/8021q/vlanproc.c linux/net/8021q/vlanproc.c
@@ -0,0 +1,481 @@
+/******************************************************************************
+ * 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/stddef.h>	/* offsetof(), etc. */
+#include <linux/errno.h>	/* return codes */
+#include <linux/kernel.h>
+#include <linux/malloc.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/segment.h>	/* kernel <-> user copy */
+#include <asm/byteorder.h>	/* htons(), etc. */
+#include <asm/uaccess.h>	/* copy_to_user */
+#include <asm/io.h>
+#include <linux/proc_fs.h>
+#include <linux/fs.h>
+#include <linux/netdevice.h>
+#include <linux/if_vlan.h>
+#include "vlanproc.h"
+#include "vlan.h"
+
+/****** Function Prototypes *************************************************/
+
+#ifdef CONFIG_PROC_FS
+
+/* Proc filesystem interface */
+static ssize_t vlan_proc_read(struct file *file, char *buf, size_t count,
+                              loff_t *ppos);
+
+/* Methods for preparing data for reading proc entries */
+
+static int vlan_config_get_info(char *buf, char **start, off_t offs, int len);
+static int vlandev_get_info(char *buf, char **start, off_t offs, int len);
+
+/* Miscellaneous */
+
+/*
+ *	Global Data
+ */
+
+/*
+ *	Names of the proc directory entries 
+ */
+
+static char name_root[]	 = "vlan";
+static char name_conf[]	 = "config";
+static char term_msg[]   = "***KERNEL:  Out of buffer space!***\n";
+
+/*
+ *	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 file_operations vlan_fops = {
+	read:	vlan_proc_read,
+	ioctl: NULL, /* vlan_proc_ioctl */
+};
+
+/*
+ *	/proc/net/vlan/<device> file and inode operations
+ */
+
+static struct file_operations vlandev_fops = {
+	read:	vlan_proc_read,
+	ioctl:	NULL, /* vlan_proc_ioctl */
+};
+
+/*
+ * 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 char conf_hdr[] = "VLAN Dev name	 | VLAN ID\n";
+
+/*
+ *	Interface functions
+ */
+
+/*
+ *	Clean up /proc/net/vlan entries
+ */
+
+void __exit 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;
+			proc_vlan_conf->get_info = vlan_config_get_info;
+			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->get_info = &vlandev_get_info;
+	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 __FUNCTION__ ": invalid argument: %p\n",
+		       vlandev);
+		return -EINVAL;
+	}
+
+	if (!(vlandev->priv_flags & IFF_802_1Q_VLAN)) {
+		printk(VLAN_DBG __FUNCTION__ ": invalid argument, device: %s is not a VLAN device, priv_flags: 0x%4hX.\n",
+		       vlandev->name, vlandev->priv_flags);
+		return -EINVAL;
+	}
+
+#ifdef VLAN_DEBUG
+	printk(VLAN_DBG __FUNCTION__ ": dev: %p\n", vlandev);
+#endif
+
+	/** NOTE:  This will consume the memory pointed to by dent, it seems. */
+	remove_proc_entry(VLAN_DEV_INFO(vlandev)->dent->name, proc_vlan_dir);
+	VLAN_DEV_INFO(vlandev)->dent = NULL;
+
+	return 0;
+}
+
+/****** Proc filesystem entry points ****************************************/
+
+/*
+ *	Read VLAN proc directory entry.
+ *	This is universal routine for reading all entries in /proc/net/vlan
+ *	directory.  Each directory entry contains a pointer to the 'method' for
+ *	preparing data for that entry.
+ *	o verify arguments
+ *	o allocate kernel buffer
+ *	o call get_info() to prepare data
+ *	o copy data to user space
+ *	o release kernel buffer
+ *
+ *	Return:	number of bytes copied to user space (0, if no data)
+ *		<0	error
+ */
+static ssize_t vlan_proc_read(struct file *file, char *buf,
+			      size_t count, loff_t *ppos)
+{
+	struct inode *inode = file->f_dentry->d_inode;
+	struct proc_dir_entry *dent;
+	char *page;
+	int pos, offs, len;
+
+	if (count <= 0)
+		return 0;
+
+	dent = inode->u.generic_ip;
+	if ((dent == NULL) || (dent->get_info == NULL))
+		return 0;
+
+	page = kmalloc(VLAN_PROC_BUFSZ, GFP_KERNEL);
+	VLAN_MEM_DBG("page malloc, addr: %p  size: %i\n",
+		     page, VLAN_PROC_BUFSZ);
+
+	if (page == NULL)
+		return -ENOBUFS;
+
+	pos = dent->get_info(page, dent->data, 0, 0);
+	offs = file->f_pos;
+	if (offs < pos) {
+		len = min_t(int, pos - offs, count);
+		if (copy_to_user(buf, (page + offs), len))
+			return -EFAULT;
+
+		file->f_pos += len;
+	} else {
+		len = 0;
+	}
+
+	kfree(page);
+	VLAN_FMEM_DBG("page free, addr: %p\n", page);
+	return len;
+}
+
+/*
+ * The following few functions build the content of /proc/net/vlan/config
+ */
+
+static int vlan_proc_get_vlan_info(char* buf, unsigned int cnt)
+{
+	struct net_device *vlandev = NULL;
+	struct vlan_group *grp = NULL;
+	int i = 0;
+	char *nm_type = NULL;
+	struct vlan_dev_info *dev_info = NULL;
+
+#ifdef VLAN_DEBUG
+	printk(VLAN_DBG __FUNCTION__ ": cnt == %i\n", cnt);
+#endif
+
+	if (vlan_name_type == VLAN_NAME_TYPE_RAW_PLUS_VID) {
+		nm_type = "VLAN_NAME_TYPE_RAW_PLUS_VID";
+	} else if (vlan_name_type == VLAN_NAME_TYPE_PLUS_VID_NO_PAD) {
+		nm_type = "VLAN_NAME_TYPE_PLUS_VID_NO_PAD";
+	} else if (vlan_name_type == VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD) {
+		nm_type = "VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD";
+	} else if (vlan_name_type == VLAN_NAME_TYPE_PLUS_VID) {
+		nm_type = "VLAN_NAME_TYPE_PLUS_VID";
+	} else {
+		nm_type = "UNKNOWN";
+	}
+
+	cnt += sprintf(buf + cnt, "Name-Type: %s  bad_proto_recvd: %lu\n",
+		       nm_type, vlan_bad_proto_recvd);
+
+	for (grp = p802_1Q_vlan_list; grp != NULL; grp = grp->next) {
+		/* loop through all devices for this device */
+#ifdef VLAN_DEBUG
+		printk(VLAN_DBG __FUNCTION__ ": found a group, addr: %p\n",grp);
+#endif
+		for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
+			vlandev = grp->vlan_devices[i];
+			if (!vlandev)
+				continue;
+#ifdef VLAN_DEBUG
+			printk(VLAN_DBG __FUNCTION__
+			       ": found a vlan_dev, addr: %p\n", vlandev);
+#endif
+			if ((cnt + 100) > VLAN_PROC_BUFSZ) {
+				if ((cnt+strlen(term_msg)) < VLAN_PROC_BUFSZ)
+					cnt += sprintf(buf+cnt, "%s", term_msg);
+
+				return cnt;
+			}
+			if (!vlandev->priv) {
+				printk(KERN_ERR __FUNCTION__
+				       ": ERROR: vlandev->priv is NULL\n");
+				continue;
+			}
+
+			dev_info = VLAN_DEV_INFO(vlandev);
+
+#ifdef VLAN_DEBUG
+			printk(VLAN_DBG __FUNCTION__
+			       ": got a good vlandev, addr: %p\n",
+			       VLAN_DEV_INFO(vlandev));
+#endif
+			cnt += sprintf(buf + cnt, "%-15s| %d  | %s\n",
+				       vlandev->name, dev_info->vlan_id,
+				       dev_info->real_dev->name);
+		}
+	}
+	return cnt;
+}
+
+/*
+ *	Prepare data for reading 'Config' entry.
+ *	Return length of data.
+ */
+
+static int vlan_config_get_info(char *buf, char **start,
+				off_t offs, int len)
+{
+	strcpy(buf, conf_hdr);
+	return vlan_proc_get_vlan_info(buf, (unsigned int)(strlen(conf_hdr)));
+}
+
+/*
+ *	Prepare data for reading <device> entry.
+ *	Return length of data.
+ *
+ *	On entry, the 'start' argument will contain a pointer to VLAN device
+ *	data space.
+ */
+
+static int vlandev_get_info(char *buf, char **start,
+			    off_t offs, int len)
+{
+	struct net_device *vlandev = (void *) start;
+	struct net_device_stats *stats = NULL;
+	struct vlan_dev_info *dev_info = NULL;
+	struct vlan_priority_tci_mapping *mp;
+	int cnt = 0;
+	int i;
+
+#ifdef VLAN_DEBUG
+	printk(VLAN_DBG __FUNCTION__ ": vlandev: %p\n", vlandev);
+#endif
+
+	if ((vlandev == NULL) || (!vlandev->priv_flags & IFF_802_1Q_VLAN))
+		return 0;
+
+	dev_info = VLAN_DEV_INFO(vlandev);
+
+	cnt += sprintf(buf + cnt, "%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);
+
+	cnt += sprintf(buf + cnt, "%30s: %12lu\n",
+		       "total frames received", stats->rx_packets);
+
+	cnt += sprintf(buf + cnt, "%30s: %12lu\n",
+		       "total bytes received", stats->rx_bytes);
+
+	cnt += sprintf(buf + cnt, "%30s: %12lu\n",
+		       "Broadcast/Multicast Rcvd", stats->multicast);
+
+	cnt += sprintf(buf + cnt, "\n%30s: %12lu\n",
+		       "total frames transmitted", stats->tx_packets);
+
+	cnt += sprintf(buf + cnt, "%30s: %12lu\n",
+		       "total bytes transmitted", stats->tx_bytes);
+
+	cnt += sprintf(buf + cnt, "%30s: %12lu\n",
+		       "total headroom inc", dev_info->cnt_inc_headroom_on_tx);
+
+	cnt += sprintf(buf + cnt, "%30s: %12lu\n",
+		       "total encap on xmit", dev_info->cnt_encap_on_xmit);
+
+	cnt += sprintf(buf + cnt, "Device: %s", dev_info->real_dev->name);
+
+	/* now show all PRIORITY mappings relating to this VLAN */
+	cnt += sprintf(buf + cnt, "\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]);
+
+	if ((cnt + 100) > VLAN_PROC_BUFSZ) {
+		if ((cnt + strlen(term_msg)) >= VLAN_PROC_BUFSZ) {
+			/* should never get here */
+			return cnt;
+		} else {
+			cnt += sprintf(buf + cnt, "%s", term_msg);
+			return cnt;
+		}
+	}
+
+	cnt += sprintf(buf + cnt, "EGRESSS priority Mappings: ");
+
+	for (i = 0; i<16; i++) {
+		mp = dev_info->egress_priority_map[i];
+		while (mp) {
+			cnt += sprintf(buf + cnt, "%lu:%hu ",
+				       mp->priority, ((mp->vlan_qos >> 13) & 0x7));
+
+			if ((cnt + 100) > VLAN_PROC_BUFSZ) {
+				if ((cnt + strlen(term_msg)) >= VLAN_PROC_BUFSZ) {
+					/* should never get here */
+					return cnt;
+				} else {
+					cnt += sprintf(buf + cnt, "%s", term_msg);
+					return cnt;
+				}
+			}
+			mp = mp->next;
+		}
+	}
+
+	cnt += sprintf(buf + cnt, "\n");
+
+	return cnt;
+}
+
+#else /* No CONFIG_PROC_FS */
+
+/*
+ *	No /proc - output stubs
+ */
+ 
+int __init vlan_proc_init (void)
+{
+	return 0;
+}
+
+void __exit vlan_proc_cleanup(void)
+{
+	return;
+}
+
+
+int vlan_proc_add_dev(struct net_device *vlandev)
+{
+	return 0;
+}
+
+int vlan_proc_rem_dev(struct net_device *vlandev)
+{
+	return 0;
+}
+
+#endif /* No CONFIG_PROC_FS */