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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/wanrouter/wanproc.c
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'net/wanrouter/wanproc.c')
-rw-r--r--net/wanrouter/wanproc.c381
1 files changed, 381 insertions, 0 deletions
diff --git a/net/wanrouter/wanproc.c b/net/wanrouter/wanproc.c
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+/*****************************************************************************
+* 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/config.h>
+#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/smp_lock.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 folowing
+ * 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 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)
+{
+ struct wan_device *wandev;
+ loff_t l = *pos;
+
+ lock_kernel();
+ 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)
+{
+ unlock_kernel();
+}
+
+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 struct seq_operations config_op = {
+ .start = r_start,
+ .next = r_next,
+ .stop = r_stop,
+ .show = config_show,
+};
+
+static 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 struct file_operations config_fops = {
+ .owner = THIS_MODULE,
+ .open = config_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static 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 struct file_operations wandev_fops = {
+ .owner = THIS_MODULE,
+ .open = wandev_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .ioctl = wanrouter_ioctl,
+};
+
+/*
+ * Initialize router proc interface.
+ */
+
+int __init wanrouter_proc_init(void)
+{
+ struct proc_dir_entry *p;
+ proc_router = proc_mkdir(ROUTER_NAME, proc_net);
+ if (!proc_router)
+ goto fail;
+
+ p = create_proc_entry("config", S_IRUGO, proc_router);
+ if (!p)
+ goto fail_config;
+ p->proc_fops = &config_fops;
+ p = create_proc_entry("status", S_IRUGO, proc_router);
+ if (!p)
+ goto fail_stat;
+ p->proc_fops = &status_fops;
+ return 0;
+fail_stat:
+ remove_proc_entry("config", proc_router);
+fail_config:
+ remove_proc_entry(ROUTER_NAME, 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, 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 = create_proc_entry(wandev->name, S_IRUGO, proc_router);
+ if (!wandev->dent)
+ return -ENOMEM;
+ wandev->dent->proc_fops = &wandev_fops;
+ 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
+ */
+