vlanproc.c
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- /******************************************************************************
- * 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/slab.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 IDn";
- /*
- * 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(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 VLANn",
- 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: %pn",
- 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: %pn", 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: %in",
- 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: %pn", 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 == %in", 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: %lun",
- 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: %pn",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: %pn", 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 NULLn");
- continue;
- }
- dev_info = VLAN_DEV_INFO(vlandev);
- #ifdef VLAN_DEBUG
- printk(VLAN_DBG __FUNCTION__
- ": got a good vlandev, addr: %pn",
- VLAN_DEV_INFO(vlandev));
- #endif
- cnt += sprintf(buf + cnt, "%-15s| %d | %sn",
- 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: %pn", 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: %hxn",
- 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: %12lun",
- "total frames received", stats->rx_packets);
- cnt += sprintf(buf + cnt, "%30s: %12lun",
- "total bytes received", stats->rx_bytes);
- cnt += sprintf(buf + cnt, "%30s: %12lun",
- "Broadcast/Multicast Rcvd", stats->multicast);
- cnt += sprintf(buf + cnt, "n%30s: %12lun",
- "total frames transmitted", stats->tx_packets);
- cnt += sprintf(buf + cnt, "%30s: %12lun",
- "total bytes transmitted", stats->tx_bytes);
- cnt += sprintf(buf + cnt, "%30s: %12lun",
- "total headroom inc", dev_info->cnt_inc_headroom_on_tx);
- cnt += sprintf(buf + cnt, "%30s: %12lun",
- "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:%lun",
- 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 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 */