comx.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:29k
- /*
- * Device driver framework for the COMX line of synchronous serial boards
- *
- * for Linux kernel 2.2.X / 2.4.X
- *
- * Original authors: Arpad Bakay <bakay.arpad@synergon.hu>,
- * Peter Bajan <bajan.peter@synergon.hu>,
- * Previous maintainer: Tivadar Szemethy <tiv@itc.hu>
- * Current maintainer: Gergely Madarasz <gorgo@itc.hu>
- *
- * Copyright (C) 1995-1999 ITConsult-Pro Co.
- *
- * Contributors:
- * Arnaldo Carvalho de Melo <acme@conectiva.com.br> (0.85)
- *
- * 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.
- *
- * Version 0.80 (99/06/11):
- * - clean up source code (playing a bit of indent)
- * - port back to kernel, add support for non-module versions
- * - add support for board resets when channel protocol is down
- * - reset the device structure after protocol exit
- * the syncppp driver needs it
- * - add support for /proc/comx/protocols and
- * /proc/comx/boardtypes
- *
- * Version 0.81 (99/06/21):
- * - comment out the board reset support code, the locomx
- * driver seems not buggy now
- * - printk() levels fixed
- *
- * Version 0.82 (99/07/08):
- * - Handle stats correctly if the lowlevel driver is
- * is not a comx one (locomx - z85230)
- *
- * Version 0.83 (99/07/15):
- * - reset line_status when interface is down
- *
- * Version 0.84 (99/12/01):
- * - comx_status should not check for IFF_UP (to report
- * line status from dev->open())
- *
- * Version 0.85 (00/08/15):
- * - resource release on failure in comx_mkdir
- * - fix return value on failure at comx_write_proc
- *
- * Changed (00/10/29, Henner Eisen):
- * - comx_rx() / comxlapb_data_indication() return status.
- */
- #define VERSION "0.85"
- #include <linux/config.h>
- #include <linux/module.h>
- #include <linux/version.h>
- #include <linux/types.h>
- #include <linux/sched.h>
- #include <linux/netdevice.h>
- #include <linux/proc_fs.h>
- #include <asm/uaccess.h>
- #include <linux/ctype.h>
- #include <linux/init.h>
- #ifdef CONFIG_KMOD
- #include <linux/kmod.h>
- #endif
- #ifndef CONFIG_PROC_FS
- #error For now, COMX really needs the /proc filesystem
- #endif
- #include <net/syncppp.h>
- #include "comx.h"
- MODULE_AUTHOR("Gergely Madarasz <gorgo@itc.hu>");
- MODULE_DESCRIPTION("Common code for the COMX synchronous serial adapters");
- MODULE_LICENSE("GPL");
- extern int comx_hw_comx_init(void);
- extern int comx_hw_locomx_init(void);
- extern int comx_hw_mixcom_init(void);
- extern int comx_proto_hdlc_init(void);
- extern int comx_proto_ppp_init(void);
- extern int comx_proto_syncppp_init(void);
- extern int comx_proto_lapb_init(void);
- extern int comx_proto_fr_init(void);
- static struct comx_hardware *comx_channels = NULL;
- static struct comx_protocol *comx_lines = NULL;
- static int comx_mkdir(struct inode *, struct dentry *, int);
- static int comx_rmdir(struct inode *, struct dentry *);
- static struct dentry *comx_lookup(struct inode *, struct dentry *);
- static struct inode_operations comx_root_inode_ops = {
- lookup: comx_lookup,
- mkdir: comx_mkdir,
- rmdir: comx_rmdir,
- };
- static int comx_delete_dentry(struct dentry *dentry);
- static struct proc_dir_entry *create_comx_proc_entry(char *name, int mode,
- int size, struct proc_dir_entry *dir);
- static struct dentry_operations comx_dentry_operations = {
- d_delete: comx_delete_dentry,
- };
- static struct proc_dir_entry * comx_root_dir;
- struct comx_debugflags_struct comx_debugflags[] = {
- { "comx_rx", DEBUG_COMX_RX },
- { "comx_tx", DEBUG_COMX_TX },
- { "hw_tx", DEBUG_HW_TX },
- { "hw_rx", DEBUG_HW_RX },
- { "hdlc_keepalive", DEBUG_HDLC_KEEPALIVE },
- { "comxppp", DEBUG_COMX_PPP },
- { "comxlapb", DEBUG_COMX_LAPB },
- { "dlci", DEBUG_COMX_DLCI },
- { NULL, 0 }
- };
- int comx_debug(struct net_device *dev, char *fmt, ...)
- {
- struct comx_channel *ch = dev->priv;
- char *page,*str;
- va_list args;
- int len;
- if (!ch->debug_area) return 0;
- if (!(page = (char *)__get_free_page(GFP_ATOMIC))) return -ENOMEM;
- va_start(args, fmt);
- len = vsprintf(str = page, fmt, args);
- va_end(args);
- if (len >= PAGE_SIZE) {
- printk(KERN_ERR "comx_debug: PANIC! len = %d !!!n", len);
- free_page((unsigned long)page);
- return -EINVAL;
- }
- while (len) {
- int to_copy;
- int free = (ch->debug_start - ch->debug_end + ch->debug_size)
- % ch->debug_size;
- to_copy = min_t(int, free ? free : ch->debug_size,
- min_t(int, ch->debug_size - ch->debug_end, len));
- memcpy(ch->debug_area + ch->debug_end, str, to_copy);
- str += to_copy;
- len -= to_copy;
- ch->debug_end = (ch->debug_end + to_copy) % ch->debug_size;
- if (ch->debug_start == ch->debug_end) // Full ? push start away
- ch->debug_start = (ch->debug_start + len + 1) %
- ch->debug_size;
- ch->debug_file->size = (ch->debug_end - ch->debug_start +
- ch->debug_size) % ch->debug_size;
- }
- free_page((unsigned long)page);
- return 0;
- }
- int comx_debug_skb(struct net_device *dev, struct sk_buff *skb, char *msg)
- {
- struct comx_channel *ch = dev->priv;
- if (!ch->debug_area) return 0;
- if (!skb) comx_debug(dev, "%s: %s NULL skbnn", dev->name, msg);
- if (!skb->len) comx_debug(dev, "%s: %s empty skbnn", dev->name, msg);
- return comx_debug_bytes(dev, skb->data, skb->len, msg);
- }
- int comx_debug_bytes(struct net_device *dev, unsigned char *bytes, int len,
- char *msg)
- {
- int pos = 0;
- struct comx_channel *ch = dev->priv;
- if (!ch->debug_area) return 0;
- comx_debug(dev, "%s: %s len %dn", dev->name, msg, len);
- while (pos != len) {
- char line[80];
- int i = 0;
- memset(line, 0, 80);
- sprintf(line,"%04d ", pos);
- do {
- sprintf(line + 5 + (pos % 16) * 3, "%02x", bytes[pos]);
- sprintf(line + 60 + (pos % 16), "%c",
- isprint(bytes[pos]) ? bytes[pos] : '.');
- pos++;
- } while (pos != len && pos % 16);
- while ( i++ != 78 ) if (line[i] == 0) line[i] = ' ';
- line[77] = 'n';
- line[78] = 0;
-
- comx_debug(dev, "%s", line);
- }
- comx_debug(dev, "n");
- return 0;
- }
- static void comx_loadavg_timerfun(unsigned long d)
- {
- struct net_device *dev = (struct net_device *)d;
- struct comx_channel *ch = dev->priv;
- ch->avg_bytes[ch->loadavg_counter] = ch->current_stats->rx_bytes;
- ch->avg_bytes[ch->loadavg_counter + ch->loadavg_size] =
- ch->current_stats->tx_bytes;
- ch->loadavg_counter = (ch->loadavg_counter + 1) % ch->loadavg_size;
- mod_timer(&ch->loadavg_timer,jiffies + HZ * ch->loadavg[0]);
- }
- #if 0
- static void comx_reset_timerfun(unsigned long d)
- {
- struct net_device *dev = (struct net_device *)d;
- struct comx_channel *ch = dev->priv;
- if(!(ch->line_status & (PROTO_LOOP | PROTO_UP))) {
- if(test_and_set_bit(0,&ch->reset_pending) && ch->HW_reset) {
- ch->HW_reset(dev);
- }
- }
- mod_timer(&ch->reset_timer, jiffies + HZ * ch->reset_timeout);
- }
- #endif
- static int comx_open(struct net_device *dev)
- {
- struct comx_channel *ch = dev->priv;
- struct proc_dir_entry *comxdir = ch->procdir->subdir;
- int ret=0;
- if (!ch->protocol || !ch->hardware) return -ENODEV;
- if ((ret = ch->HW_open(dev))) return ret;
- if ((ret = ch->LINE_open(dev))) {
- ch->HW_close(dev);
- return ret;
- };
- for (; comxdir ; comxdir = comxdir->next) {
- if (strcmp(comxdir->name, FILENAME_HARDWARE) == 0 ||
- strcmp(comxdir->name, FILENAME_PROTOCOL) == 0)
- comxdir->mode = S_IFREG | 0444;
- }
- #if 0
- ch->reset_pending = 1;
- ch->reset_timeout = 30;
- ch->reset_timer.function = comx_reset_timerfun;
- ch->reset_timer.data = (unsigned long)dev;
- ch->reset_timer.expires = jiffies + HZ * ch->reset_timeout;
- add_timer(&ch->reset_timer);
- #endif
- return 0;
- }
- static int comx_close(struct net_device *dev)
- {
- struct comx_channel *ch = dev->priv;
- struct proc_dir_entry *comxdir = ch->procdir->subdir;
- int ret = -ENODEV;
- if (test_and_clear_bit(0, &ch->lineup_pending)) {
- del_timer(&ch->lineup_timer);
- }
- #if 0
- del_timer(&ch->reset_timer);
- #endif
- if (ch->init_status & LINE_OPEN && ch->protocol && ch->LINE_close) {
- ret = ch->LINE_close(dev);
- }
- if (ret) return ret;
- if (ch->init_status & HW_OPEN && ch->hardware && ch->HW_close) {
- ret = ch->HW_close(dev);
- }
-
- ch->line_status=0;
- for (; comxdir ; comxdir = comxdir->next) {
- if (strcmp(comxdir->name, FILENAME_HARDWARE) == 0 ||
- strcmp(comxdir->name, FILENAME_PROTOCOL) == 0)
- comxdir->mode = S_IFREG | 0644;
- }
- return ret;
- }
- void comx_status(struct net_device *dev, int status)
- {
- struct comx_channel *ch = dev->priv;
- #if 0
- if(status & (PROTO_UP | PROTO_LOOP)) {
- clear_bit(0,&ch->reset_pending);
- }
- #endif
- printk(KERN_NOTICE "Interface %s: modem status %s, line protocol %sn",
- dev->name, status & LINE_UP ? "UP" : "DOWN",
- status & PROTO_LOOP ? "LOOP" : status & PROTO_UP ?
- "UP" : "DOWN");
-
- ch->line_status = status;
- }
- static int comx_xmit(struct sk_buff *skb, struct net_device *dev)
- {
- struct comx_channel *ch = dev->priv;
- int rc;
- if (skb->len > dev->mtu + dev->hard_header_len) {
- printk(KERN_ERR "comx_xmit: %s: skb->len %d > dev->mtu %dn", dev->name,
- (int)skb->len, dev->mtu);
- }
-
- if (ch->debug_flags & DEBUG_COMX_TX) {
- comx_debug_skb(dev, skb, "comx_xmit skb");
- }
-
- rc=ch->LINE_xmit(skb, dev);
- // if (!rc) dev_kfree_skb(skb);
- return rc;
- }
- static int comx_header(struct sk_buff *skb, struct net_device *dev,
- unsigned short type, void *daddr, void *saddr, unsigned len)
- {
- struct comx_channel *ch = dev->priv;
- if (ch->LINE_header) {
- return (ch->LINE_header(skb, dev, type, daddr, saddr, len));
- } else {
- return 0;
- }
- }
- static int comx_rebuild_header(struct sk_buff *skb)
- {
- struct net_device *dev = skb->dev;
- struct comx_channel *ch = dev->priv;
- if (ch->LINE_rebuild_header) {
- return(ch->LINE_rebuild_header(skb));
- } else {
- return 0;
- }
- }
- int comx_rx(struct net_device *dev, struct sk_buff *skb)
- {
- struct comx_channel *ch = dev->priv;
- if (ch->debug_flags & DEBUG_COMX_RX) {
- comx_debug_skb(dev, skb, "comx_rx skb");
- }
- if (skb) {
- netif_rx(skb);
- dev->last_rx = jiffies;
- }
- return 0;
- }
- static struct net_device_stats *comx_stats(struct net_device *dev)
- {
- struct comx_channel *ch = (struct comx_channel *)dev->priv;
- return ch->current_stats;
- }
- void comx_lineup_func(unsigned long d)
- {
- struct net_device *dev = (struct net_device *)d;
- struct comx_channel *ch = dev->priv;
- del_timer(&ch->lineup_timer);
- clear_bit(0, &ch->lineup_pending);
- if (ch->LINE_status) {
- ch->LINE_status(dev, ch->line_status |= LINE_UP);
- }
- }
- #define LOADAVG(avg, off) (int)
- ((ch->avg_bytes[(ch->loadavg_counter - 1 + ch->loadavg_size * 2)
- % ch->loadavg_size + off] - ch->avg_bytes[(ch->loadavg_counter - 1
- - ch->loadavg[avg] / ch->loadavg[0] + ch->loadavg_size * 2)
- % ch->loadavg_size + off]) / ch->loadavg[avg] * 8)
- static int comx_statistics(struct net_device *dev, char *page)
- {
- struct comx_channel *ch = dev->priv;
- int len = 0;
- int tmp;
- int i = 0;
- char tmpstr[20];
- int tmpstrlen = 0;
- len += sprintf(page + len, "Interface administrative status is %s, "
- "modem status is %s, protocol is %sn",
- dev->flags & IFF_UP ? "UP" : "DOWN",
- ch->line_status & LINE_UP ? "UP" : "DOWN",
- ch->line_status & PROTO_LOOP ? "LOOP" :
- ch->line_status & PROTO_UP ? "UP" : "DOWN");
- len += sprintf(page + len, "Modem status changes: %lu, Transmitter status "
- "is %s, tbusy: %dn", ch->current_stats->tx_carrier_errors, ch->HW_txe ?
- ch->HW_txe(dev) ? "IDLE" : "BUSY" : "NOT READY", netif_running(dev));
- len += sprintf(page + len, "Interface load (input): %d / %d / %d bits/s (",
- LOADAVG(0,0), LOADAVG(1, 0), LOADAVG(2, 0));
- tmpstr[0] = 0;
- for (i=0; i != 3; i++) {
- char tf;
- tf = ch->loadavg[i] % 60 == 0 &&
- ch->loadavg[i] / 60 > 0 ? 'm' : 's';
- tmpstrlen += sprintf(tmpstr + tmpstrlen, "%d%c%s",
- ch->loadavg[i] / (tf == 'm' ? 60 : 1), tf,
- i == 2 ? ")n" : "/");
- }
- len += sprintf(page + len,
- "%s (output): %d / %d / %d bits/s (%s", tmpstr,
- LOADAVG(0,ch->loadavg_size), LOADAVG(1, ch->loadavg_size),
- LOADAVG(2, ch->loadavg_size), tmpstr);
- len += sprintf(page + len, "Debug flags: ");
- tmp = len; i = 0;
- while (comx_debugflags[i].name) {
- if (ch->debug_flags & comx_debugflags[i].value)
- len += sprintf(page + len, "%s ",
- comx_debugflags[i].name);
- i++;
- }
- len += sprintf(page + len, "%sn", tmp == len ? "none" : "");
- len += sprintf(page + len, "RX errors: len: %lu, overrun: %lu, crc: %lu, "
- "aborts: %lun buffer overrun: %lu, pbuffer overrun: %lun"
- "TX errors: underrun: %lun",
- ch->current_stats->rx_length_errors, ch->current_stats->rx_over_errors,
- ch->current_stats->rx_crc_errors, ch->current_stats->rx_frame_errors,
- ch->current_stats->rx_missed_errors, ch->current_stats->rx_fifo_errors,
- ch->current_stats->tx_fifo_errors);
- if (ch->LINE_statistics && (ch->init_status & LINE_OPEN)) {
- len += ch->LINE_statistics(dev, page + len);
- } else {
- len += sprintf(page+len, "Line status: driver not initializedn");
- }
- if (ch->HW_statistics && (ch->init_status & HW_OPEN)) {
- len += ch->HW_statistics(dev, page + len);
- } else {
- len += sprintf(page+len, "Board status: driver not initializedn");
- }
- return len;
- }
- static int comx_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
- {
- struct comx_channel *ch = dev->priv;
- if (ch->LINE_ioctl) {
- return(ch->LINE_ioctl(dev, ifr, cmd));
- }
- return -EINVAL;
- }
- static void comx_reset_dev(struct net_device *dev)
- {
- dev->open = comx_open;
- dev->stop = comx_close;
- dev->hard_start_xmit = comx_xmit;
- dev->hard_header = comx_header;
- dev->rebuild_header = comx_rebuild_header;
- dev->get_stats = comx_stats;
- dev->do_ioctl = comx_ioctl;
- dev->change_mtu = NULL;
- dev->tx_queue_len = 20;
- dev->flags = IFF_NOARP;
- }
- static int comx_init_dev(struct net_device *dev)
- {
- struct comx_channel *ch;
- if ((ch = kmalloc(sizeof(struct comx_channel), GFP_KERNEL)) == NULL) {
- return -ENOMEM;
- }
- memset(ch, 0, sizeof(struct comx_channel));
- ch->loadavg[0] = 5;
- ch->loadavg[1] = 300;
- ch->loadavg[2] = 900;
- ch->loadavg_size = ch->loadavg[2] / ch->loadavg[0] + 1;
- if ((ch->avg_bytes = kmalloc(ch->loadavg_size *
- sizeof(unsigned long) * 2, GFP_KERNEL)) == NULL) {
- kfree(ch);
- return -ENOMEM;
- }
- memset(ch->avg_bytes, 0, ch->loadavg_size * sizeof(unsigned long) * 2);
- ch->loadavg_counter = 0;
- ch->loadavg_timer.function = comx_loadavg_timerfun;
- ch->loadavg_timer.data = (unsigned long)dev;
- ch->loadavg_timer.expires = jiffies + HZ * ch->loadavg[0];
- add_timer(&ch->loadavg_timer);
- dev->priv = (void *)ch;
- ch->dev = dev;
- ch->line_status &= ~LINE_UP;
- ch->current_stats = &ch->stats;
- comx_reset_dev(dev);
- return 0;
- }
- static int comx_read_proc(char *page, char **start, off_t off, int count,
- int *eof, void *data)
- {
- struct proc_dir_entry *file = (struct proc_dir_entry *)data;
- struct net_device *dev = file->parent->data;
- struct comx_channel *ch=(struct comx_channel *)dev->priv;
- int len = 0;
- if (strcmp(file->name, FILENAME_STATUS) == 0) {
- len = comx_statistics(dev, page);
- } else if (strcmp(file->name, FILENAME_HARDWARE) == 0) {
- len = sprintf(page, "%sn", ch->hardware ?
- ch->hardware->name : HWNAME_NONE);
- } else if (strcmp(file->name, FILENAME_PROTOCOL) == 0) {
- len = sprintf(page, "%sn", ch->protocol ?
- ch->protocol->name : PROTONAME_NONE);
- } else if (strcmp(file->name, FILENAME_LINEUPDELAY) == 0) {
- len = sprintf(page, "%01dn", ch->lineup_delay);
- }
- if (off >= len) {
- *eof = 1;
- return 0;
- }
- *start = page + off;
- if (count >= len - off) {
- *eof = 1;
- }
- return min_t(int, count, len - off);
- }
- static int comx_root_read_proc(char *page, char **start, off_t off, int count,
- int *eof, void *data)
- {
- struct proc_dir_entry *file = (struct proc_dir_entry *)data;
- struct comx_hardware *hw;
- struct comx_protocol *line;
- int len = 0;
- if (strcmp(file->name, FILENAME_HARDWARELIST) == 0) {
- for(hw=comx_channels;hw;hw=hw->next)
- len+=sprintf(page+len, "%sn", hw->name);
- } else if (strcmp(file->name, FILENAME_PROTOCOLLIST) == 0) {
- for(line=comx_lines;line;line=line->next)
- len+=sprintf(page+len, "%sn", line->name);
- }
- if (off >= len) {
- *eof = 1;
- return 0;
- }
- *start = page + off;
- if (count >= len - off) {
- *eof = 1;
- }
- return min_t(int, count, len - off);
- }
- static int comx_write_proc(struct file *file, const char *buffer, u_long count,
- void *data)
- {
- struct proc_dir_entry *entry = (struct proc_dir_entry *)data;
- struct net_device *dev = (struct net_device *)entry->parent->data;
- struct comx_channel *ch=(struct comx_channel *)dev->priv;
- char *page;
- struct comx_hardware *hw = comx_channels;
- struct comx_protocol *line = comx_lines;
- char str[30];
- int ret=0;
- if (count > PAGE_SIZE) {
- printk(KERN_ERR "count is %lu > %d!!!n", count, (int)PAGE_SIZE);
- return -ENOSPC;
- }
- if (!(page = (char *)__get_free_page(GFP_KERNEL))) return -ENOMEM;
- if(copy_from_user(page, buffer, count))
- {
- count = -EFAULT;
- goto out;
- }
- if (page[count-1] == 'n')
- page[count-1] = ' ';
- else if (count < PAGE_SIZE)
- page[count] = ' ';
- else if (page[count]) {
- count = -EINVAL;
- goto out;
- }
- if (strcmp(entry->name, FILENAME_DEBUG) == 0) {
- int i;
- int ret = 0;
- if ((i = simple_strtoul(page, NULL, 10)) != 0) {
- unsigned long flags;
- save_flags(flags); cli();
- if (ch->debug_area) kfree(ch->debug_area);
- if ((ch->debug_area = kmalloc(ch->debug_size = i,
- GFP_KERNEL)) == NULL) {
- ret = -ENOMEM;
- }
- ch->debug_start = ch->debug_end = 0;
- restore_flags(flags);
- free_page((unsigned long)page);
- return ret ? ret : count;
- }
-
- if (*page != '+' && *page != '-') {
- free_page((unsigned long)page);
- return -EINVAL;
- }
- while (comx_debugflags[i].value &&
- strncmp(comx_debugflags[i].name, page + 1,
- strlen(comx_debugflags[i].name))) {
- i++;
- }
-
- if (comx_debugflags[i].value == 0) {
- printk(KERN_ERR "Invalid debug optionn");
- free_page((unsigned long)page);
- return -EINVAL;
- }
- if (*page == '+') {
- ch->debug_flags |= comx_debugflags[i].value;
- } else {
- ch->debug_flags &= ~comx_debugflags[i].value;
- }
- } else if (strcmp(entry->name, FILENAME_HARDWARE) == 0) {
- if(strlen(page)>10) {
- free_page((unsigned long)page);
- return -EINVAL;
- }
- while (hw) {
- if (strcmp(hw->name, page) == 0) {
- break;
- } else {
- hw = hw->next;
- }
- }
- #ifdef CONFIG_KMOD
- if(!hw && comx_strcasecmp(HWNAME_NONE,page) != 0){
- sprintf(str,"comx-hw-%s",page);
- request_module(str);
- }
- hw=comx_channels;
- while (hw) {
- if (comx_strcasecmp(hw->name, page) == 0) {
- break;
- } else {
- hw = hw->next;
- }
- }
- #endif
- if (comx_strcasecmp(HWNAME_NONE, page) != 0 && !hw) {
- free_page((unsigned long)page);
- return -ENODEV;
- }
- if (ch->init_status & HW_OPEN) {
- free_page((unsigned long)page);
- return -EBUSY;
- }
- if (ch->hardware && ch->hardware->hw_exit &&
- (ret=ch->hardware->hw_exit(dev))) {
- free_page((unsigned long)page);
- return ret;
- }
- ch->hardware = hw;
- entry->size = strlen(page) + 1;
- if (hw && hw->hw_init) hw->hw_init(dev);
- } else if (strcmp(entry->name, FILENAME_PROTOCOL) == 0) {
- if(strlen(page)>10) {
- free_page((unsigned long)page);
- return -EINVAL;
- }
- while (line) {
- if (comx_strcasecmp(line->name, page) == 0) {
- break;
- } else {
- line = line->next;
- }
- }
- #ifdef CONFIG_KMOD
- if(!line && comx_strcasecmp(PROTONAME_NONE, page) != 0) {
- sprintf(str,"comx-proto-%s",page);
- request_module(str);
- }
- line=comx_lines;
- while (line) {
- if (comx_strcasecmp(line->name, page) == 0) {
- break;
- } else {
- line = line->next;
- }
- }
- #endif
-
- if (comx_strcasecmp(PROTONAME_NONE, page) != 0 && !line) {
- free_page((unsigned long)page);
- return -ENODEV;
- }
-
- if (ch->init_status & LINE_OPEN) {
- free_page((unsigned long)page);
- return -EBUSY;
- }
-
- if (ch->protocol && ch->protocol->line_exit &&
- (ret=ch->protocol->line_exit(dev))) {
- free_page((unsigned long)page);
- return ret;
- }
- ch->protocol = line;
- entry->size = strlen(page) + 1;
- comx_reset_dev(dev);
- if (line && line->line_init) line->line_init(dev);
- } else if (strcmp(entry->name, FILENAME_LINEUPDELAY) == 0) {
- int i;
- if ((i = simple_strtoul(page, NULL, 10)) != 0) {
- if (i >=0 && i < 10) {
- ch->lineup_delay = i;
- } else {
- printk(KERN_ERR "comx: invalid lineup_delay valuen");
- }
- }
- }
- out:
- free_page((unsigned long)page);
- return count;
- }
- static int comx_mkdir(struct inode *dir, struct dentry *dentry, int mode)
- {
- struct proc_dir_entry *new_dir, *debug_file;
- struct net_device *dev;
- struct comx_channel *ch;
- int ret = -EIO;
- if ((dev = kmalloc(sizeof(struct net_device), GFP_KERNEL)) == NULL) {
- return -ENOMEM;
- }
- memset(dev, 0, sizeof(struct net_device));
- if ((new_dir = create_proc_entry(dentry->d_name.name, mode | S_IFDIR,
- comx_root_dir)) == NULL) {
- goto cleanup_dev;
- }
- new_dir->nlink = 2;
- new_dir->data = NULL; // ide jon majd a struct dev
- /* Ezek kellenek */
- if (!create_comx_proc_entry(FILENAME_HARDWARE, 0644,
- strlen(HWNAME_NONE) + 1, new_dir)) {
- goto cleanup_new_dir;
- }
- if (!create_comx_proc_entry(FILENAME_PROTOCOL, 0644,
- strlen(PROTONAME_NONE) + 1, new_dir)) {
- goto cleanup_filename_hardware;
- }
- if (!create_comx_proc_entry(FILENAME_STATUS, 0444, 0, new_dir)) {
- goto cleanup_filename_protocol;
- }
- if (!create_comx_proc_entry(FILENAME_LINEUPDELAY, 0644, 2, new_dir)) {
- goto cleanup_filename_status;
- }
- if ((debug_file = create_proc_entry(FILENAME_DEBUG,
- S_IFREG | 0644, new_dir)) == NULL) {
- goto cleanup_filename_lineupdelay;
- }
- debug_file->data = (void *)debug_file;
- debug_file->read_proc = NULL; // see below
- debug_file->write_proc = &comx_write_proc;
- debug_file->nlink = 1;
- strcpy(dev->name, (char *)new_dir->name);
- dev->init = comx_init_dev;
- if (register_netdevice(dev)) {
- goto cleanup_filename_debug;
- }
- ch=dev->priv;
- if((ch->if_ptr = (void *)kmalloc(sizeof(struct ppp_device),
- GFP_KERNEL)) == NULL) {
- goto cleanup_register;
- }
- memset(ch->if_ptr, 0, sizeof(struct ppp_device));
- ch->debug_file = debug_file;
- ch->procdir = new_dir;
- new_dir->data = dev;
- ch->debug_start = ch->debug_end = 0;
- if ((ch->debug_area = kmalloc(ch->debug_size = DEFAULT_DEBUG_SIZE,
- GFP_KERNEL)) == NULL) {
- ret = -ENOMEM;
- goto cleanup_if_ptr;
- }
- ch->lineup_delay = DEFAULT_LINEUP_DELAY;
- MOD_INC_USE_COUNT;
- return 0;
- cleanup_if_ptr:
- kfree(ch->if_ptr);
- cleanup_register:
- unregister_netdevice(dev);
- cleanup_filename_debug:
- remove_proc_entry(FILENAME_DEBUG, new_dir);
- cleanup_filename_lineupdelay:
- remove_proc_entry(FILENAME_LINEUPDELAY, new_dir);
- cleanup_filename_status:
- remove_proc_entry(FILENAME_STATUS, new_dir);
- cleanup_filename_protocol:
- remove_proc_entry(FILENAME_PROTOCOL, new_dir);
- cleanup_filename_hardware:
- remove_proc_entry(FILENAME_HARDWARE, new_dir);
- cleanup_new_dir:
- remove_proc_entry(dentry->d_name.name, comx_root_dir);
- cleanup_dev:
- kfree(dev);
- return ret;
- }
- static int comx_rmdir(struct inode *dir, struct dentry *dentry)
- {
- struct proc_dir_entry *entry = dentry->d_inode->u.generic_ip;
- struct net_device *dev = entry->data;
- struct comx_channel *ch = dev->priv;
- int ret;
- if (dev->flags & IFF_UP) {
- printk(KERN_ERR "%s: down interface before removing itn", dev->name);
- return -EBUSY;
- }
- if (ch->protocol && ch->protocol->line_exit &&
- (ret=ch->protocol->line_exit(dev))) {
- return ret;
- }
- if (ch->hardware && ch->hardware->hw_exit &&
- (ret=ch->hardware->hw_exit(dev))) {
- if(ch->protocol && ch->protocol->line_init) {
- ch->protocol->line_init(dev);
- }
- return ret;
- }
- ch->protocol = NULL;
- ch->hardware = NULL;
- del_timer(&ch->loadavg_timer);
- kfree(ch->avg_bytes);
- unregister_netdev(dev);
- if (ch->debug_area) {
- kfree(ch->debug_area);
- }
- if (dev->priv) {
- kfree(dev->priv);
- }
- kfree(dev);
- remove_proc_entry(FILENAME_DEBUG, entry);
- remove_proc_entry(FILENAME_LINEUPDELAY, entry);
- remove_proc_entry(FILENAME_STATUS, entry);
- remove_proc_entry(FILENAME_HARDWARE, entry);
- remove_proc_entry(FILENAME_PROTOCOL, entry);
- remove_proc_entry(dentry->d_name.name, comx_root_dir);
- MOD_DEC_USE_COUNT;
- return 0;
- }
- static struct dentry *comx_lookup(struct inode *dir, struct dentry *dentry)
- {
- struct proc_dir_entry *de;
- struct inode *inode = NULL;
- if ((de = (struct proc_dir_entry *) dir->u.generic_ip) != NULL) {
- for (de = de->subdir ; de ; de = de->next) {
- if ((de && de->low_ino) &&
- (de->namelen == dentry->d_name.len) &&
- (memcmp(dentry->d_name.name, de->name,
- de->namelen) == 0)) {
- if ((inode = proc_get_inode(dir->i_sb,
- de->low_ino, de)) == NULL) {
- printk(KERN_ERR "COMX: lookup errorn");
- return ERR_PTR(-EINVAL);
- }
- break;
- }
- }
- }
- dentry->d_op = &comx_dentry_operations;
- d_add(dentry, inode);
- return NULL;
- }
- int comx_strcasecmp(const char *cs, const char *ct)
- {
- register signed char __res;
- while (1) {
- if ((__res = toupper(*cs) - toupper(*ct++)) != 0 || !*cs++) {
- break;
- }
- }
- return __res;
- }
- static int comx_delete_dentry(struct dentry *dentry)
- {
- return 1;
- }
- static struct proc_dir_entry *create_comx_proc_entry(char *name, int mode,
- int size, struct proc_dir_entry *dir)
- {
- struct proc_dir_entry *new_file;
- if ((new_file = create_proc_entry(name, S_IFREG | mode, dir)) != NULL) {
- new_file->data = (void *)new_file;
- new_file->read_proc = &comx_read_proc;
- new_file->write_proc = &comx_write_proc;
- new_file->size = size;
- new_file->nlink = 1;
- }
- return(new_file);
- }
- int comx_register_hardware(struct comx_hardware *comx_hw)
- {
- struct comx_hardware *hw = comx_channels;
- if (!hw) {
- comx_channels = comx_hw;
- } else {
- while (hw->next != NULL && strcmp(comx_hw->name, hw->name) != 0) {
- hw = hw->next;
- }
- if (strcmp(comx_hw->name, hw->name) == 0) {
- return -1;
- }
- hw->next = comx_hw;
- }
- printk(KERN_INFO "COMX: driver for hardware type %s, version %sn", comx_hw->name, comx_hw->version);
- return 0;
- }
- int comx_unregister_hardware(char *name)
- {
- struct comx_hardware *hw = comx_channels;
- if (!hw) {
- return -1;
- }
- if (strcmp(hw->name, name) == 0) {
- comx_channels = comx_channels->next;
- return 0;
- }
- while (hw->next != NULL && strcmp(hw->next->name,name) != 0) {
- hw = hw->next;
- }
- if (hw->next != NULL && strcmp(hw->next->name, name) == 0) {
- hw->next = hw->next->next;
- return 0;
- }
- return -1;
- }
- int comx_register_protocol(struct comx_protocol *comx_line)
- {
- struct comx_protocol *pr = comx_lines;
- if (!pr) {
- comx_lines = comx_line;
- } else {
- while (pr->next != NULL && strcmp(comx_line->name, pr->name) !=0) {
- pr = pr->next;
- }
- if (strcmp(comx_line->name, pr->name) == 0) {
- return -1;
- }
- pr->next = comx_line;
- }
- printk(KERN_INFO "COMX: driver for protocol type %s, version %sn", comx_line->name, comx_line->version);
- return 0;
- }
- int comx_unregister_protocol(char *name)
- {
- struct comx_protocol *pr = comx_lines;
- if (!pr) {
- return -1;
- }
- if (strcmp(pr->name, name) == 0) {
- comx_lines = comx_lines->next;
- return 0;
- }
- while (pr->next != NULL && strcmp(pr->next->name,name) != 0) {
- pr = pr->next;
- }
- if (pr->next != NULL && strcmp(pr->next->name, name) == 0) {
- pr->next = pr->next->next;
- return 0;
- }
- return -1;
- }
- #ifdef MODULE
- #define comx_init init_module
- #endif
- int __init comx_init(void)
- {
- struct proc_dir_entry *new_file;
- comx_root_dir = create_proc_entry("comx",
- S_IFDIR | S_IWUSR | S_IRUGO | S_IXUGO, &proc_root);
- if (!comx_root_dir)
- return -ENOMEM;
- comx_root_dir->proc_iops = &comx_root_inode_ops;
- if ((new_file = create_proc_entry(FILENAME_HARDWARELIST,
- S_IFREG | 0444, comx_root_dir)) == NULL) {
- return -ENOMEM;
- }
-
- new_file->data = new_file;
- new_file->read_proc = &comx_root_read_proc;
- new_file->write_proc = NULL;
- new_file->nlink = 1;
- if ((new_file = create_proc_entry(FILENAME_PROTOCOLLIST,
- S_IFREG | 0444, comx_root_dir)) == NULL) {
- return -ENOMEM;
- }
-
- new_file->data = new_file;
- new_file->read_proc = &comx_root_read_proc;
- new_file->write_proc = NULL;
- new_file->nlink = 1;
- printk(KERN_INFO "COMX: driver version %s (C) 1995-1999 ITConsult-Pro Co. <info@itc.hu>n",
- VERSION);
- #ifndef MODULE
- #ifdef CONFIG_COMX_HW_COMX
- comx_hw_comx_init();
- #endif
- #ifdef CONFIG_COMX_HW_LOCOMX
- comx_hw_locomx_init();
- #endif
- #ifdef CONFIG_COMX_HW_MIXCOM
- comx_hw_mixcom_init();
- #endif
- #ifdef CONFIG_COMX_PROTO_HDLC
- comx_proto_hdlc_init();
- #endif
- #ifdef CONFIG_COMX_PROTO_PPP
- comx_proto_ppp_init();
- #endif
- #ifdef CONFIG_COMX_PROTO_LAPB
- comx_proto_lapb_init();
- #endif
- #ifdef CONFIG_COMX_PROTO_FR
- comx_proto_fr_init();
- #endif
- #endif
- return 0;
- }
- #ifdef MODULE
- void cleanup_module(void)
- {
- remove_proc_entry(FILENAME_HARDWARELIST, comx_root_dir);
- remove_proc_entry(FILENAME_PROTOCOLLIST, comx_root_dir);
- remove_proc_entry(comx_root_dir->name, &proc_root);
- }
- #endif
- EXPORT_SYMBOL(comx_register_hardware);
- EXPORT_SYMBOL(comx_unregister_hardware);
- EXPORT_SYMBOL(comx_register_protocol);
- EXPORT_SYMBOL(comx_unregister_protocol);
- EXPORT_SYMBOL(comx_debug_skb);
- EXPORT_SYMBOL(comx_debug_bytes);
- EXPORT_SYMBOL(comx_debug);
- EXPORT_SYMBOL(comx_lineup_func);
- EXPORT_SYMBOL(comx_status);
- EXPORT_SYMBOL(comx_rx);
- EXPORT_SYMBOL(comx_strcasecmp);
- EXPORT_SYMBOL(comx_root_dir);