/***************************************************************************** * wanproc.c WAN Router Module. /proc filesystem interface. * * This module is completely hardware-independent and provides * access to the router using Linux /proc filesystem. * * Author: Gideon Hack * * Copyright: (c) 1995-1999 Sangoma Technologies Inc. * * 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. * ============================================================================ * Jun 02, 1999 Gideon Hack Updates for Linux 2.2.X kernels. * Jun 29, 1997 Alan Cox Merged with 1.0.3 vendor code * Jan 29, 1997 Gene Kozin v1.0.1. Implemented /proc read routines * Jan 30, 1997 Alan Cox Hacked around for 2.1 * Dec 13, 1996 Gene Kozin Initial version (based on Sangoma's WANPIPE) *****************************************************************************/ #include <linux/init.h> /* __initfunc et al. */ #include <linux/stddef.h> /* offsetof(), etc. */ #include <linux/errno.h> /* return codes */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/wanrouter.h> /* WAN router API definitions */ #include <linux/seq_file.h> #include <linux/mutex.h> #include <net/net_namespace.h> #include <asm/io.h> #define PROC_STATS_FORMAT "%30s: %12lu\n" /****** Defines and Macros **************************************************/ #define PROT_DECODE(prot) ((prot == WANCONFIG_FR) ? " FR" :\ (prot == WANCONFIG_X25) ? " X25" : \ (prot == WANCONFIG_PPP) ? " PPP" : \ (prot == WANCONFIG_CHDLC) ? " CHDLC": \ (prot == WANCONFIG_MPPP) ? " MPPP" : \ " Unknown" ) /****** Function Prototypes *************************************************/ #ifdef CONFIG_PROC_FS /* Miscellaneous */ /* * Structures for interfacing with the /proc filesystem. * Router creates its own directory /proc/net/router with the following * entries: * config device configuration * status global device statistics * <device> entry for each WAN device */ /* * Generic /proc/net/router/<file> file and inode operations */ /* * /proc/net/router */ static DEFINE_MUTEX(config_mutex); static struct proc_dir_entry *proc_router; /* Strings */ /* * Interface functions */ /****** Proc filesystem entry points ****************************************/ /* * Iterator */ static void *r_start(struct seq_file *m, loff_t *pos) __acquires(kernel_lock) { struct wan_device *wandev; loff_t l = *pos; mutex_lock(&config_mutex); if (!l--) return SEQ_START_TOKEN; for (wandev = wanrouter_router_devlist; l-- && wandev; wandev = wandev->next) ; return wandev; } static void *r_next(struct seq_file *m, void *v, loff_t *pos) { struct wan_device *wandev = v; (*pos)++; return (v == SEQ_START_TOKEN) ? wanrouter_router_devlist : wandev->next; } static void r_stop(struct seq_file *m, void *v) __releases(kernel_lock) { mutex_unlock(&config_mutex); } static int config_show(struct seq_file *m, void *v) { struct wan_device *p = v; if (v == SEQ_START_TOKEN) { seq_puts(m, "Device name | port |IRQ|DMA| mem.addr |" "mem.size|option1|option2|option3|option4\n"); return 0; } if (!p->state) return 0; seq_printf(m, "%-15s|0x%-4X|%3u|%3u| 0x%-8lX |0x%-6X|%7u|%7u|%7u|%7u\n", p->name, p->ioport, p->irq, p->dma, p->maddr, p->msize, p->hw_opt[0], p->hw_opt[1], p->hw_opt[2], p->hw_opt[3]); return 0; } static int status_show(struct seq_file *m, void *v) { struct wan_device *p = v; if (v == SEQ_START_TOKEN) { seq_puts(m, "Device name |protocol|station|interface|" "clocking|baud rate| MTU |ndev|link state\n"); return 0; } if (!p->state) return 0; seq_printf(m, "%-15s|%-8s| %-7s| %-9s|%-8s|%9u|%5u|%3u |", p->name, PROT_DECODE(p->config_id), p->config_id == WANCONFIG_FR ? (p->station ? "Node" : "CPE") : (p->config_id == WANCONFIG_X25 ? (p->station ? "DCE" : "DTE") : ("N/A")), p->interface ? "V.35" : "RS-232", p->clocking ? "internal" : "external", p->bps, p->mtu, p->ndev); switch (p->state) { case WAN_UNCONFIGURED: seq_printf(m, "%-12s\n", "unconfigured"); break; case WAN_DISCONNECTED: seq_printf(m, "%-12s\n", "disconnected"); break; case WAN_CONNECTING: seq_printf(m, "%-12s\n", "connecting"); break; case WAN_CONNECTED: seq_printf(m, "%-12s\n", "connected"); break; default: seq_printf(m, "%-12s\n", "invalid"); break; } return 0; } static const struct seq_operations config_op = { .start = r_start, .next = r_next, .stop = r_stop, .show = config_show, }; static const struct seq_operations status_op = { .start = r_start, .next = r_next, .stop = r_stop, .show = status_show, }; static int config_open(struct inode *inode, struct file *file) { return seq_open(file, &config_op); } static int status_open(struct inode *inode, struct file *file) { return seq_open(file, &status_op); } static const struct file_operations config_fops = { .owner = THIS_MODULE, .open = config_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; static const struct file_operations status_fops = { .owner = THIS_MODULE, .open = status_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; static int wandev_show(struct seq_file *m, void *v) { struct wan_device *wandev = m->private; if (wandev->magic != ROUTER_MAGIC) return 0; if (!wandev->state) { seq_puts(m, "device is not configured!\n"); return 0; } /* Update device statistics */ if (wandev->update) { int err = wandev->update(wandev); if (err == -EAGAIN) { seq_puts(m, "Device is busy!\n"); return 0; } if (err) { seq_puts(m, "Device is not configured!\n"); return 0; } } seq_printf(m, PROC_STATS_FORMAT, "total packets received", wandev->stats.rx_packets); seq_printf(m, PROC_STATS_FORMAT, "total packets transmitted", wandev->stats.tx_packets); seq_printf(m, PROC_STATS_FORMAT, "total bytes received", wandev->stats.rx_bytes); seq_printf(m, PROC_STATS_FORMAT, "total bytes transmitted", wandev->stats.tx_bytes); seq_printf(m, PROC_STATS_FORMAT, "bad packets received", wandev->stats.rx_errors); seq_printf(m, PROC_STATS_FORMAT, "packet transmit problems", wandev->stats.tx_errors); seq_printf(m, PROC_STATS_FORMAT, "received frames dropped", wandev->stats.rx_dropped); seq_printf(m, PROC_STATS_FORMAT, "transmit frames dropped", wandev->stats.tx_dropped); seq_printf(m, PROC_STATS_FORMAT, "multicast packets received", wandev->stats.multicast); seq_printf(m, PROC_STATS_FORMAT, "transmit collisions", wandev->stats.collisions); seq_printf(m, PROC_STATS_FORMAT, "receive length errors", wandev->stats.rx_length_errors); seq_printf(m, PROC_STATS_FORMAT, "receiver overrun errors", wandev->stats.rx_over_errors); seq_printf(m, PROC_STATS_FORMAT, "CRC errors", wandev->stats.rx_crc_errors); seq_printf(m, PROC_STATS_FORMAT, "frame format errors (aborts)", wandev->stats.rx_frame_errors); seq_printf(m, PROC_STATS_FORMAT, "receiver fifo overrun", wandev->stats.rx_fifo_errors); seq_printf(m, PROC_STATS_FORMAT, "receiver missed packet", wandev->stats.rx_missed_errors); seq_printf(m, PROC_STATS_FORMAT, "aborted frames transmitted", wandev->stats.tx_aborted_errors); return 0; } static int wandev_open(struct inode *inode, struct file *file) { return single_open(file, wandev_show, PDE(inode)->data); } static const struct file_operations wandev_fops = { .owner = THIS_MODULE, .open = wandev_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, .unlocked_ioctl = wanrouter_ioctl, }; /* * Initialize router proc interface. */ int __init wanrouter_proc_init(void) { struct proc_dir_entry *p; proc_router = proc_mkdir(ROUTER_NAME, init_net.proc_net); if (!proc_router) goto fail; p = proc_create("config", S_IRUGO, proc_router, &config_fops); if (!p) goto fail_config; p = proc_create("status", S_IRUGO, proc_router, &status_fops); if (!p) goto fail_stat; return 0; fail_stat: remove_proc_entry("config", proc_router); fail_config: remove_proc_entry(ROUTER_NAME, init_net.proc_net); fail: return -ENOMEM; } /* * Clean up router proc interface. */ void wanrouter_proc_cleanup(void) { remove_proc_entry("config", proc_router); remove_proc_entry("status", proc_router); remove_proc_entry(ROUTER_NAME, init_net.proc_net); } /* * Add directory entry for WAN device. */ int wanrouter_proc_add(struct wan_device* wandev) { if (wandev->magic != ROUTER_MAGIC) return -EINVAL; wandev->dent = proc_create(wandev->name, S_IRUGO, proc_router, &wandev_fops); if (!wandev->dent) return -ENOMEM; wandev->dent->data = wandev; return 0; } /* * Delete directory entry for WAN device. */ int wanrouter_proc_delete(struct wan_device* wandev) { if (wandev->magic != ROUTER_MAGIC) return -EINVAL; remove_proc_entry(wandev->name, proc_router); return 0; } #else /* * No /proc - output stubs */ int __init wanrouter_proc_init(void) { return 0; } void wanrouter_proc_cleanup(void) { } int wanrouter_proc_add(struct wan_device *wandev) { return 0; } int wanrouter_proc_delete(struct wan_device *wandev) { return 0; } #endif /* * End */