forked from luck/tmp_suning_uos_patched
4ce3b30cf3
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2151 lines
56 KiB
C
2151 lines
56 KiB
C
/*
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* $Id: netiucv.c,v 1.69 2006/01/12 14:33:09 cohuck Exp $
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*
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* IUCV network driver
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*
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* Copyright (C) 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation
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* Author(s): Fritz Elfert (elfert@de.ibm.com, felfert@millenux.com)
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*
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* Sysfs integration and all bugs therein by Cornelia Huck
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* (cornelia.huck@de.ibm.com)
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*
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* Documentation used:
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* the source of the original IUCV driver by:
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* Stefan Hegewald <hegewald@de.ibm.com>
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* Hartmut Penner <hpenner@de.ibm.com>
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* Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
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* Martin Schwidefsky (schwidefsky@de.ibm.com)
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* Alan Altmark (Alan_Altmark@us.ibm.com) Sept. 2000
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* RELEASE-TAG: IUCV network driver $Revision: 1.69 $
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*
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*/
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#undef DEBUG
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/interrupt.h>
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#include <linux/timer.h>
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#include <linux/sched.h>
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#include <linux/bitops.h>
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#include <linux/signal.h>
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#include <linux/string.h>
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#include <linux/device.h>
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#include <linux/ip.h>
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#include <linux/if_arp.h>
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#include <linux/tcp.h>
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#include <linux/skbuff.h>
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#include <linux/ctype.h>
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#include <net/dst.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include "iucv.h"
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#include "fsm.h"
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MODULE_AUTHOR
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("(C) 2001 IBM Corporation by Fritz Elfert (felfert@millenux.com)");
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MODULE_DESCRIPTION ("Linux for S/390 IUCV network driver");
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#define PRINTK_HEADER " iucv: " /* for debugging */
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static struct device_driver netiucv_driver = {
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.name = "netiucv",
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.bus = &iucv_bus,
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};
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/**
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* Per connection profiling data
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*/
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struct connection_profile {
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unsigned long maxmulti;
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unsigned long maxcqueue;
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unsigned long doios_single;
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unsigned long doios_multi;
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unsigned long txlen;
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unsigned long tx_time;
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struct timespec send_stamp;
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unsigned long tx_pending;
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unsigned long tx_max_pending;
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};
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/**
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* Representation of one iucv connection
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*/
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struct iucv_connection {
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struct iucv_connection *next;
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iucv_handle_t handle;
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__u16 pathid;
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struct sk_buff *rx_buff;
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struct sk_buff *tx_buff;
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struct sk_buff_head collect_queue;
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struct sk_buff_head commit_queue;
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spinlock_t collect_lock;
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int collect_len;
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int max_buffsize;
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fsm_timer timer;
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fsm_instance *fsm;
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struct net_device *netdev;
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struct connection_profile prof;
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char userid[9];
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};
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/**
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* Linked list of all connection structs.
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*/
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static struct iucv_connection *iucv_connections;
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/**
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* Representation of event-data for the
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* connection state machine.
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*/
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struct iucv_event {
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struct iucv_connection *conn;
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void *data;
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};
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/**
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* Private part of the network device structure
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*/
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struct netiucv_priv {
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struct net_device_stats stats;
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unsigned long tbusy;
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fsm_instance *fsm;
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struct iucv_connection *conn;
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struct device *dev;
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};
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/**
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* Link level header for a packet.
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*/
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typedef struct ll_header_t {
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__u16 next;
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} ll_header;
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#define NETIUCV_HDRLEN (sizeof(ll_header))
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#define NETIUCV_BUFSIZE_MAX 32768
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#define NETIUCV_BUFSIZE_DEFAULT NETIUCV_BUFSIZE_MAX
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#define NETIUCV_MTU_MAX (NETIUCV_BUFSIZE_MAX - NETIUCV_HDRLEN)
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#define NETIUCV_MTU_DEFAULT 9216
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#define NETIUCV_QUEUELEN_DEFAULT 50
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#define NETIUCV_TIMEOUT_5SEC 5000
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/**
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* Compatibility macros for busy handling
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* of network devices.
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*/
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static __inline__ void netiucv_clear_busy(struct net_device *dev)
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{
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clear_bit(0, &(((struct netiucv_priv *)dev->priv)->tbusy));
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netif_wake_queue(dev);
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}
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static __inline__ int netiucv_test_and_set_busy(struct net_device *dev)
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{
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netif_stop_queue(dev);
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return test_and_set_bit(0, &((struct netiucv_priv *)dev->priv)->tbusy);
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}
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static __u8 iucv_host[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
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static __u8 iucvMagic[16] = {
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0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,
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0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40
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};
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/**
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* This mask means the 16-byte IUCV "magic" and the origin userid must
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* match exactly as specified in order to give connection_pending()
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* control.
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*/
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static __u8 netiucv_mask[] = {
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
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};
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/**
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* Convert an iucv userId to its printable
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* form (strip whitespace at end).
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*
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* @param An iucv userId
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*
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* @returns The printable string (static data!!)
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*/
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static __inline__ char *
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netiucv_printname(char *name)
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{
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static char tmp[9];
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char *p = tmp;
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memcpy(tmp, name, 8);
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tmp[8] = '\0';
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while (*p && (!isspace(*p)))
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p++;
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*p = '\0';
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return tmp;
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}
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/**
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* States of the interface statemachine.
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*/
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enum dev_states {
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DEV_STATE_STOPPED,
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DEV_STATE_STARTWAIT,
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DEV_STATE_STOPWAIT,
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DEV_STATE_RUNNING,
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/**
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* MUST be always the last element!!
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*/
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NR_DEV_STATES
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};
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static const char *dev_state_names[] = {
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"Stopped",
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"StartWait",
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"StopWait",
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"Running",
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};
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/**
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* Events of the interface statemachine.
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*/
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enum dev_events {
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DEV_EVENT_START,
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DEV_EVENT_STOP,
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DEV_EVENT_CONUP,
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DEV_EVENT_CONDOWN,
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/**
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* MUST be always the last element!!
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*/
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NR_DEV_EVENTS
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};
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static const char *dev_event_names[] = {
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"Start",
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"Stop",
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"Connection up",
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"Connection down",
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};
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/**
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* Events of the connection statemachine
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*/
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enum conn_events {
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/**
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* Events, representing callbacks from
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* lowlevel iucv layer)
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*/
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CONN_EVENT_CONN_REQ,
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CONN_EVENT_CONN_ACK,
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CONN_EVENT_CONN_REJ,
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CONN_EVENT_CONN_SUS,
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CONN_EVENT_CONN_RES,
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CONN_EVENT_RX,
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CONN_EVENT_TXDONE,
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/**
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* Events, representing errors return codes from
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* calls to lowlevel iucv layer
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*/
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/**
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* Event, representing timer expiry.
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*/
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CONN_EVENT_TIMER,
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/**
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* Events, representing commands from upper levels.
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*/
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CONN_EVENT_START,
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CONN_EVENT_STOP,
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/**
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* MUST be always the last element!!
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*/
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NR_CONN_EVENTS,
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};
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static const char *conn_event_names[] = {
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"Remote connection request",
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"Remote connection acknowledge",
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"Remote connection reject",
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"Connection suspended",
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"Connection resumed",
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"Data received",
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"Data sent",
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"Timer",
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"Start",
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"Stop",
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};
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/**
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* States of the connection statemachine.
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*/
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enum conn_states {
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/**
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* Connection not assigned to any device,
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* initial state, invalid
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*/
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CONN_STATE_INVALID,
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/**
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* Userid assigned but not operating
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*/
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CONN_STATE_STOPPED,
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/**
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* Connection registered,
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* no connection request sent yet,
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* no connection request received
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*/
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CONN_STATE_STARTWAIT,
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/**
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* Connection registered and connection request sent,
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* no acknowledge and no connection request received yet.
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*/
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CONN_STATE_SETUPWAIT,
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/**
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* Connection up and running idle
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*/
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CONN_STATE_IDLE,
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/**
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* Data sent, awaiting CONN_EVENT_TXDONE
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*/
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CONN_STATE_TX,
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/**
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* Error during registration.
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*/
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CONN_STATE_REGERR,
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/**
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* Error during registration.
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*/
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CONN_STATE_CONNERR,
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/**
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* MUST be always the last element!!
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*/
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NR_CONN_STATES,
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};
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static const char *conn_state_names[] = {
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"Invalid",
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"Stopped",
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"StartWait",
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"SetupWait",
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"Idle",
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"TX",
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"Terminating",
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"Registration error",
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"Connect error",
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};
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/**
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* Debug Facility Stuff
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*/
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static debug_info_t *iucv_dbf_setup = NULL;
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static debug_info_t *iucv_dbf_data = NULL;
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static debug_info_t *iucv_dbf_trace = NULL;
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DEFINE_PER_CPU(char[256], iucv_dbf_txt_buf);
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static void
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iucv_unregister_dbf_views(void)
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{
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if (iucv_dbf_setup)
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debug_unregister(iucv_dbf_setup);
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if (iucv_dbf_data)
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debug_unregister(iucv_dbf_data);
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if (iucv_dbf_trace)
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debug_unregister(iucv_dbf_trace);
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}
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static int
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iucv_register_dbf_views(void)
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{
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iucv_dbf_setup = debug_register(IUCV_DBF_SETUP_NAME,
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IUCV_DBF_SETUP_PAGES,
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IUCV_DBF_SETUP_NR_AREAS,
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IUCV_DBF_SETUP_LEN);
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iucv_dbf_data = debug_register(IUCV_DBF_DATA_NAME,
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IUCV_DBF_DATA_PAGES,
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IUCV_DBF_DATA_NR_AREAS,
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IUCV_DBF_DATA_LEN);
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iucv_dbf_trace = debug_register(IUCV_DBF_TRACE_NAME,
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IUCV_DBF_TRACE_PAGES,
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IUCV_DBF_TRACE_NR_AREAS,
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IUCV_DBF_TRACE_LEN);
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if ((iucv_dbf_setup == NULL) || (iucv_dbf_data == NULL) ||
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(iucv_dbf_trace == NULL)) {
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iucv_unregister_dbf_views();
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return -ENOMEM;
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}
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debug_register_view(iucv_dbf_setup, &debug_hex_ascii_view);
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debug_set_level(iucv_dbf_setup, IUCV_DBF_SETUP_LEVEL);
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debug_register_view(iucv_dbf_data, &debug_hex_ascii_view);
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debug_set_level(iucv_dbf_data, IUCV_DBF_DATA_LEVEL);
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debug_register_view(iucv_dbf_trace, &debug_hex_ascii_view);
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debug_set_level(iucv_dbf_trace, IUCV_DBF_TRACE_LEVEL);
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return 0;
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}
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/**
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* Callback-wrappers, called from lowlevel iucv layer.
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*****************************************************************************/
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static void
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netiucv_callback_rx(iucv_MessagePending *eib, void *pgm_data)
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{
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struct iucv_connection *conn = (struct iucv_connection *)pgm_data;
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struct iucv_event ev;
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ev.conn = conn;
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ev.data = (void *)eib;
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fsm_event(conn->fsm, CONN_EVENT_RX, &ev);
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}
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static void
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netiucv_callback_txdone(iucv_MessageComplete *eib, void *pgm_data)
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{
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struct iucv_connection *conn = (struct iucv_connection *)pgm_data;
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struct iucv_event ev;
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ev.conn = conn;
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ev.data = (void *)eib;
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fsm_event(conn->fsm, CONN_EVENT_TXDONE, &ev);
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}
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|
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static void
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netiucv_callback_connack(iucv_ConnectionComplete *eib, void *pgm_data)
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{
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struct iucv_connection *conn = (struct iucv_connection *)pgm_data;
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struct iucv_event ev;
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|
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ev.conn = conn;
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ev.data = (void *)eib;
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fsm_event(conn->fsm, CONN_EVENT_CONN_ACK, &ev);
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}
|
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|
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static void
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netiucv_callback_connreq(iucv_ConnectionPending *eib, void *pgm_data)
|
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{
|
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struct iucv_connection *conn = (struct iucv_connection *)pgm_data;
|
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struct iucv_event ev;
|
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|
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ev.conn = conn;
|
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ev.data = (void *)eib;
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fsm_event(conn->fsm, CONN_EVENT_CONN_REQ, &ev);
|
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}
|
||
|
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static void
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netiucv_callback_connrej(iucv_ConnectionSevered *eib, void *pgm_data)
|
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{
|
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struct iucv_connection *conn = (struct iucv_connection *)pgm_data;
|
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struct iucv_event ev;
|
||
|
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ev.conn = conn;
|
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ev.data = (void *)eib;
|
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fsm_event(conn->fsm, CONN_EVENT_CONN_REJ, &ev);
|
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}
|
||
|
||
static void
|
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netiucv_callback_connsusp(iucv_ConnectionQuiesced *eib, void *pgm_data)
|
||
{
|
||
struct iucv_connection *conn = (struct iucv_connection *)pgm_data;
|
||
struct iucv_event ev;
|
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|
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ev.conn = conn;
|
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ev.data = (void *)eib;
|
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fsm_event(conn->fsm, CONN_EVENT_CONN_SUS, &ev);
|
||
}
|
||
|
||
static void
|
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netiucv_callback_connres(iucv_ConnectionResumed *eib, void *pgm_data)
|
||
{
|
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struct iucv_connection *conn = (struct iucv_connection *)pgm_data;
|
||
struct iucv_event ev;
|
||
|
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ev.conn = conn;
|
||
ev.data = (void *)eib;
|
||
fsm_event(conn->fsm, CONN_EVENT_CONN_RES, &ev);
|
||
}
|
||
|
||
static iucv_interrupt_ops_t netiucv_ops = {
|
||
.ConnectionPending = netiucv_callback_connreq,
|
||
.ConnectionComplete = netiucv_callback_connack,
|
||
.ConnectionSevered = netiucv_callback_connrej,
|
||
.ConnectionQuiesced = netiucv_callback_connsusp,
|
||
.ConnectionResumed = netiucv_callback_connres,
|
||
.MessagePending = netiucv_callback_rx,
|
||
.MessageComplete = netiucv_callback_txdone
|
||
};
|
||
|
||
/**
|
||
* Dummy NOP action for all statemachines
|
||
*/
|
||
static void
|
||
fsm_action_nop(fsm_instance *fi, int event, void *arg)
|
||
{
|
||
}
|
||
|
||
/**
|
||
* Actions of the connection statemachine
|
||
*****************************************************************************/
|
||
|
||
/**
|
||
* Helper function for conn_action_rx()
|
||
* Unpack a just received skb and hand it over to
|
||
* upper layers.
|
||
*
|
||
* @param conn The connection where this skb has been received.
|
||
* @param pskb The received skb.
|
||
*/
|
||
//static __inline__ void
|
||
static void
|
||
netiucv_unpack_skb(struct iucv_connection *conn, struct sk_buff *pskb)
|
||
{
|
||
struct net_device *dev = conn->netdev;
|
||
struct netiucv_priv *privptr = dev->priv;
|
||
__u16 offset = 0;
|
||
|
||
skb_put(pskb, NETIUCV_HDRLEN);
|
||
pskb->dev = dev;
|
||
pskb->ip_summed = CHECKSUM_NONE;
|
||
pskb->protocol = ntohs(ETH_P_IP);
|
||
|
||
while (1) {
|
||
struct sk_buff *skb;
|
||
ll_header *header = (ll_header *)pskb->data;
|
||
|
||
if (!header->next)
|
||
break;
|
||
|
||
skb_pull(pskb, NETIUCV_HDRLEN);
|
||
header->next -= offset;
|
||
offset += header->next;
|
||
header->next -= NETIUCV_HDRLEN;
|
||
if (skb_tailroom(pskb) < header->next) {
|
||
PRINT_WARN("%s: Illegal next field in iucv header: "
|
||
"%d > %d\n",
|
||
dev->name, header->next, skb_tailroom(pskb));
|
||
IUCV_DBF_TEXT_(data, 2, "Illegal next field: %d > %d\n",
|
||
header->next, skb_tailroom(pskb));
|
||
return;
|
||
}
|
||
skb_put(pskb, header->next);
|
||
pskb->mac.raw = pskb->data;
|
||
skb = dev_alloc_skb(pskb->len);
|
||
if (!skb) {
|
||
PRINT_WARN("%s Out of memory in netiucv_unpack_skb\n",
|
||
dev->name);
|
||
IUCV_DBF_TEXT(data, 2,
|
||
"Out of memory in netiucv_unpack_skb\n");
|
||
privptr->stats.rx_dropped++;
|
||
return;
|
||
}
|
||
memcpy(skb_put(skb, pskb->len), pskb->data, pskb->len);
|
||
skb->mac.raw = skb->data;
|
||
skb->dev = pskb->dev;
|
||
skb->protocol = pskb->protocol;
|
||
pskb->ip_summed = CHECKSUM_UNNECESSARY;
|
||
/*
|
||
* Since receiving is always initiated from a tasklet (in iucv.c),
|
||
* we must use netif_rx_ni() instead of netif_rx()
|
||
*/
|
||
netif_rx_ni(skb);
|
||
dev->last_rx = jiffies;
|
||
privptr->stats.rx_packets++;
|
||
privptr->stats.rx_bytes += skb->len;
|
||
skb_pull(pskb, header->next);
|
||
skb_put(pskb, NETIUCV_HDRLEN);
|
||
}
|
||
}
|
||
|
||
static void
|
||
conn_action_rx(fsm_instance *fi, int event, void *arg)
|
||
{
|
||
struct iucv_event *ev = (struct iucv_event *)arg;
|
||
struct iucv_connection *conn = ev->conn;
|
||
iucv_MessagePending *eib = (iucv_MessagePending *)ev->data;
|
||
struct netiucv_priv *privptr =(struct netiucv_priv *)conn->netdev->priv;
|
||
|
||
__u32 msglen = eib->ln1msg2.ipbfln1f;
|
||
int rc;
|
||
|
||
IUCV_DBF_TEXT(trace, 4, __FUNCTION__);
|
||
|
||
if (!conn->netdev) {
|
||
/* FRITZ: How to tell iucv LL to drop the msg? */
|
||
PRINT_WARN("Received data for unlinked connection\n");
|
||
IUCV_DBF_TEXT(data, 2,
|
||
"Received data for unlinked connection\n");
|
||
return;
|
||
}
|
||
if (msglen > conn->max_buffsize) {
|
||
/* FRITZ: How to tell iucv LL to drop the msg? */
|
||
privptr->stats.rx_dropped++;
|
||
PRINT_WARN("msglen %d > max_buffsize %d\n",
|
||
msglen, conn->max_buffsize);
|
||
IUCV_DBF_TEXT_(data, 2, "msglen %d > max_buffsize %d\n",
|
||
msglen, conn->max_buffsize);
|
||
return;
|
||
}
|
||
conn->rx_buff->data = conn->rx_buff->tail = conn->rx_buff->head;
|
||
conn->rx_buff->len = 0;
|
||
rc = iucv_receive(conn->pathid, eib->ipmsgid, eib->iptrgcls,
|
||
conn->rx_buff->data, msglen, NULL, NULL, NULL);
|
||
if (rc || msglen < 5) {
|
||
privptr->stats.rx_errors++;
|
||
PRINT_WARN("iucv_receive returned %08x\n", rc);
|
||
IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_receive\n", rc);
|
||
return;
|
||
}
|
||
netiucv_unpack_skb(conn, conn->rx_buff);
|
||
}
|
||
|
||
static void
|
||
conn_action_txdone(fsm_instance *fi, int event, void *arg)
|
||
{
|
||
struct iucv_event *ev = (struct iucv_event *)arg;
|
||
struct iucv_connection *conn = ev->conn;
|
||
iucv_MessageComplete *eib = (iucv_MessageComplete *)ev->data;
|
||
struct netiucv_priv *privptr = NULL;
|
||
/* Shut up, gcc! skb is always below 2G. */
|
||
__u32 single_flag = eib->ipmsgtag;
|
||
__u32 txbytes = 0;
|
||
__u32 txpackets = 0;
|
||
__u32 stat_maxcq = 0;
|
||
struct sk_buff *skb;
|
||
unsigned long saveflags;
|
||
ll_header header;
|
||
|
||
IUCV_DBF_TEXT(trace, 4, __FUNCTION__);
|
||
|
||
if (conn && conn->netdev && conn->netdev->priv)
|
||
privptr = (struct netiucv_priv *)conn->netdev->priv;
|
||
conn->prof.tx_pending--;
|
||
if (single_flag) {
|
||
if ((skb = skb_dequeue(&conn->commit_queue))) {
|
||
atomic_dec(&skb->users);
|
||
dev_kfree_skb_any(skb);
|
||
if (privptr) {
|
||
privptr->stats.tx_packets++;
|
||
privptr->stats.tx_bytes +=
|
||
(skb->len - NETIUCV_HDRLEN
|
||
- NETIUCV_HDRLEN);
|
||
}
|
||
}
|
||
}
|
||
conn->tx_buff->data = conn->tx_buff->tail = conn->tx_buff->head;
|
||
conn->tx_buff->len = 0;
|
||
spin_lock_irqsave(&conn->collect_lock, saveflags);
|
||
while ((skb = skb_dequeue(&conn->collect_queue))) {
|
||
header.next = conn->tx_buff->len + skb->len + NETIUCV_HDRLEN;
|
||
memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header,
|
||
NETIUCV_HDRLEN);
|
||
memcpy(skb_put(conn->tx_buff, skb->len), skb->data, skb->len);
|
||
txbytes += skb->len;
|
||
txpackets++;
|
||
stat_maxcq++;
|
||
atomic_dec(&skb->users);
|
||
dev_kfree_skb_any(skb);
|
||
}
|
||
if (conn->collect_len > conn->prof.maxmulti)
|
||
conn->prof.maxmulti = conn->collect_len;
|
||
conn->collect_len = 0;
|
||
spin_unlock_irqrestore(&conn->collect_lock, saveflags);
|
||
if (conn->tx_buff->len) {
|
||
int rc;
|
||
|
||
header.next = 0;
|
||
memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header,
|
||
NETIUCV_HDRLEN);
|
||
|
||
conn->prof.send_stamp = xtime;
|
||
rc = iucv_send(conn->pathid, NULL, 0, 0, 0, 0,
|
||
conn->tx_buff->data, conn->tx_buff->len);
|
||
conn->prof.doios_multi++;
|
||
conn->prof.txlen += conn->tx_buff->len;
|
||
conn->prof.tx_pending++;
|
||
if (conn->prof.tx_pending > conn->prof.tx_max_pending)
|
||
conn->prof.tx_max_pending = conn->prof.tx_pending;
|
||
if (rc) {
|
||
conn->prof.tx_pending--;
|
||
fsm_newstate(fi, CONN_STATE_IDLE);
|
||
if (privptr)
|
||
privptr->stats.tx_errors += txpackets;
|
||
PRINT_WARN("iucv_send returned %08x\n", rc);
|
||
IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc);
|
||
} else {
|
||
if (privptr) {
|
||
privptr->stats.tx_packets += txpackets;
|
||
privptr->stats.tx_bytes += txbytes;
|
||
}
|
||
if (stat_maxcq > conn->prof.maxcqueue)
|
||
conn->prof.maxcqueue = stat_maxcq;
|
||
}
|
||
} else
|
||
fsm_newstate(fi, CONN_STATE_IDLE);
|
||
}
|
||
|
||
static void
|
||
conn_action_connaccept(fsm_instance *fi, int event, void *arg)
|
||
{
|
||
struct iucv_event *ev = (struct iucv_event *)arg;
|
||
struct iucv_connection *conn = ev->conn;
|
||
iucv_ConnectionPending *eib = (iucv_ConnectionPending *)ev->data;
|
||
struct net_device *netdev = conn->netdev;
|
||
struct netiucv_priv *privptr = (struct netiucv_priv *)netdev->priv;
|
||
int rc;
|
||
__u16 msglimit;
|
||
__u8 udata[16];
|
||
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
|
||
rc = iucv_accept(eib->ippathid, NETIUCV_QUEUELEN_DEFAULT, udata, 0,
|
||
conn->handle, conn, NULL, &msglimit);
|
||
if (rc) {
|
||
PRINT_WARN("%s: IUCV accept failed with error %d\n",
|
||
netdev->name, rc);
|
||
IUCV_DBF_TEXT_(setup, 2, "rc %d from iucv_accept", rc);
|
||
return;
|
||
}
|
||
fsm_newstate(fi, CONN_STATE_IDLE);
|
||
conn->pathid = eib->ippathid;
|
||
netdev->tx_queue_len = msglimit;
|
||
fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev);
|
||
}
|
||
|
||
static void
|
||
conn_action_connreject(fsm_instance *fi, int event, void *arg)
|
||
{
|
||
struct iucv_event *ev = (struct iucv_event *)arg;
|
||
struct iucv_connection *conn = ev->conn;
|
||
struct net_device *netdev = conn->netdev;
|
||
iucv_ConnectionPending *eib = (iucv_ConnectionPending *)ev->data;
|
||
__u8 udata[16];
|
||
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
|
||
iucv_sever(eib->ippathid, udata);
|
||
if (eib->ippathid != conn->pathid) {
|
||
PRINT_INFO("%s: IR Connection Pending; "
|
||
"pathid %d does not match original pathid %d\n",
|
||
netdev->name, eib->ippathid, conn->pathid);
|
||
IUCV_DBF_TEXT_(data, 2,
|
||
"connreject: IR pathid %d, conn. pathid %d\n",
|
||
eib->ippathid, conn->pathid);
|
||
iucv_sever(conn->pathid, udata);
|
||
}
|
||
}
|
||
|
||
static void
|
||
conn_action_connack(fsm_instance *fi, int event, void *arg)
|
||
{
|
||
struct iucv_event *ev = (struct iucv_event *)arg;
|
||
struct iucv_connection *conn = ev->conn;
|
||
iucv_ConnectionComplete *eib = (iucv_ConnectionComplete *)ev->data;
|
||
struct net_device *netdev = conn->netdev;
|
||
struct netiucv_priv *privptr = (struct netiucv_priv *)netdev->priv;
|
||
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
|
||
fsm_deltimer(&conn->timer);
|
||
fsm_newstate(fi, CONN_STATE_IDLE);
|
||
if (eib->ippathid != conn->pathid) {
|
||
PRINT_INFO("%s: IR Connection Complete; "
|
||
"pathid %d does not match original pathid %d\n",
|
||
netdev->name, eib->ippathid, conn->pathid);
|
||
IUCV_DBF_TEXT_(data, 2,
|
||
"connack: IR pathid %d, conn. pathid %d\n",
|
||
eib->ippathid, conn->pathid);
|
||
conn->pathid = eib->ippathid;
|
||
}
|
||
netdev->tx_queue_len = eib->ipmsglim;
|
||
fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev);
|
||
}
|
||
|
||
static void
|
||
conn_action_conntimsev(fsm_instance *fi, int event, void *arg)
|
||
{
|
||
struct iucv_connection *conn = (struct iucv_connection *)arg;
|
||
__u8 udata[16];
|
||
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
|
||
fsm_deltimer(&conn->timer);
|
||
iucv_sever(conn->pathid, udata);
|
||
fsm_newstate(fi, CONN_STATE_STARTWAIT);
|
||
}
|
||
|
||
static void
|
||
conn_action_connsever(fsm_instance *fi, int event, void *arg)
|
||
{
|
||
struct iucv_event *ev = (struct iucv_event *)arg;
|
||
struct iucv_connection *conn = ev->conn;
|
||
struct net_device *netdev = conn->netdev;
|
||
struct netiucv_priv *privptr = (struct netiucv_priv *)netdev->priv;
|
||
__u8 udata[16];
|
||
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
|
||
fsm_deltimer(&conn->timer);
|
||
iucv_sever(conn->pathid, udata);
|
||
PRINT_INFO("%s: Remote dropped connection\n", netdev->name);
|
||
IUCV_DBF_TEXT(data, 2,
|
||
"conn_action_connsever: Remote dropped connection\n");
|
||
fsm_newstate(fi, CONN_STATE_STARTWAIT);
|
||
fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev);
|
||
}
|
||
|
||
static void
|
||
conn_action_start(fsm_instance *fi, int event, void *arg)
|
||
{
|
||
struct iucv_event *ev = (struct iucv_event *)arg;
|
||
struct iucv_connection *conn = ev->conn;
|
||
__u16 msglimit;
|
||
int rc;
|
||
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
|
||
if (!conn->handle) {
|
||
IUCV_DBF_TEXT(trace, 5, "calling iucv_register_program\n");
|
||
conn->handle =
|
||
iucv_register_program(iucvMagic, conn->userid,
|
||
netiucv_mask,
|
||
&netiucv_ops, conn);
|
||
fsm_newstate(fi, CONN_STATE_STARTWAIT);
|
||
if (!conn->handle) {
|
||
fsm_newstate(fi, CONN_STATE_REGERR);
|
||
conn->handle = NULL;
|
||
IUCV_DBF_TEXT(setup, 2,
|
||
"NULL from iucv_register_program\n");
|
||
return;
|
||
}
|
||
|
||
PRINT_DEBUG("%s('%s'): registered successfully\n",
|
||
conn->netdev->name, conn->userid);
|
||
}
|
||
|
||
PRINT_DEBUG("%s('%s'): connecting ...\n",
|
||
conn->netdev->name, conn->userid);
|
||
|
||
/* We must set the state before calling iucv_connect because the callback
|
||
* handler could be called at any point after the connection request is
|
||
* sent */
|
||
|
||
fsm_newstate(fi, CONN_STATE_SETUPWAIT);
|
||
rc = iucv_connect(&(conn->pathid), NETIUCV_QUEUELEN_DEFAULT, iucvMagic,
|
||
conn->userid, iucv_host, 0, NULL, &msglimit,
|
||
conn->handle, conn);
|
||
switch (rc) {
|
||
case 0:
|
||
conn->netdev->tx_queue_len = msglimit;
|
||
fsm_addtimer(&conn->timer, NETIUCV_TIMEOUT_5SEC,
|
||
CONN_EVENT_TIMER, conn);
|
||
return;
|
||
case 11:
|
||
PRINT_INFO("%s: User %s is currently not available.\n",
|
||
conn->netdev->name,
|
||
netiucv_printname(conn->userid));
|
||
fsm_newstate(fi, CONN_STATE_STARTWAIT);
|
||
return;
|
||
case 12:
|
||
PRINT_INFO("%s: User %s is currently not ready.\n",
|
||
conn->netdev->name,
|
||
netiucv_printname(conn->userid));
|
||
fsm_newstate(fi, CONN_STATE_STARTWAIT);
|
||
return;
|
||
case 13:
|
||
PRINT_WARN("%s: Too many IUCV connections.\n",
|
||
conn->netdev->name);
|
||
fsm_newstate(fi, CONN_STATE_CONNERR);
|
||
break;
|
||
case 14:
|
||
PRINT_WARN(
|
||
"%s: User %s has too many IUCV connections.\n",
|
||
conn->netdev->name,
|
||
netiucv_printname(conn->userid));
|
||
fsm_newstate(fi, CONN_STATE_CONNERR);
|
||
break;
|
||
case 15:
|
||
PRINT_WARN(
|
||
"%s: No IUCV authorization in CP directory.\n",
|
||
conn->netdev->name);
|
||
fsm_newstate(fi, CONN_STATE_CONNERR);
|
||
break;
|
||
default:
|
||
PRINT_WARN("%s: iucv_connect returned error %d\n",
|
||
conn->netdev->name, rc);
|
||
fsm_newstate(fi, CONN_STATE_CONNERR);
|
||
break;
|
||
}
|
||
IUCV_DBF_TEXT_(setup, 5, "iucv_connect rc is %d\n", rc);
|
||
IUCV_DBF_TEXT(trace, 5, "calling iucv_unregister_program\n");
|
||
iucv_unregister_program(conn->handle);
|
||
conn->handle = NULL;
|
||
}
|
||
|
||
static void
|
||
netiucv_purge_skb_queue(struct sk_buff_head *q)
|
||
{
|
||
struct sk_buff *skb;
|
||
|
||
while ((skb = skb_dequeue(q))) {
|
||
atomic_dec(&skb->users);
|
||
dev_kfree_skb_any(skb);
|
||
}
|
||
}
|
||
|
||
static void
|
||
conn_action_stop(fsm_instance *fi, int event, void *arg)
|
||
{
|
||
struct iucv_event *ev = (struct iucv_event *)arg;
|
||
struct iucv_connection *conn = ev->conn;
|
||
struct net_device *netdev = conn->netdev;
|
||
struct netiucv_priv *privptr = (struct netiucv_priv *)netdev->priv;
|
||
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
|
||
fsm_deltimer(&conn->timer);
|
||
fsm_newstate(fi, CONN_STATE_STOPPED);
|
||
netiucv_purge_skb_queue(&conn->collect_queue);
|
||
if (conn->handle)
|
||
IUCV_DBF_TEXT(trace, 5, "calling iucv_unregister_program\n");
|
||
iucv_unregister_program(conn->handle);
|
||
conn->handle = NULL;
|
||
netiucv_purge_skb_queue(&conn->commit_queue);
|
||
fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev);
|
||
}
|
||
|
||
static void
|
||
conn_action_inval(fsm_instance *fi, int event, void *arg)
|
||
{
|
||
struct iucv_event *ev = (struct iucv_event *)arg;
|
||
struct iucv_connection *conn = ev->conn;
|
||
struct net_device *netdev = conn->netdev;
|
||
|
||
PRINT_WARN("%s: Cannot connect without username\n",
|
||
netdev->name);
|
||
IUCV_DBF_TEXT(data, 2, "conn_action_inval called\n");
|
||
}
|
||
|
||
static const fsm_node conn_fsm[] = {
|
||
{ CONN_STATE_INVALID, CONN_EVENT_START, conn_action_inval },
|
||
{ CONN_STATE_STOPPED, CONN_EVENT_START, conn_action_start },
|
||
|
||
{ CONN_STATE_STOPPED, CONN_EVENT_STOP, conn_action_stop },
|
||
{ CONN_STATE_STARTWAIT, CONN_EVENT_STOP, conn_action_stop },
|
||
{ CONN_STATE_SETUPWAIT, CONN_EVENT_STOP, conn_action_stop },
|
||
{ CONN_STATE_IDLE, CONN_EVENT_STOP, conn_action_stop },
|
||
{ CONN_STATE_TX, CONN_EVENT_STOP, conn_action_stop },
|
||
{ CONN_STATE_REGERR, CONN_EVENT_STOP, conn_action_stop },
|
||
{ CONN_STATE_CONNERR, CONN_EVENT_STOP, conn_action_stop },
|
||
|
||
{ CONN_STATE_STOPPED, CONN_EVENT_CONN_REQ, conn_action_connreject },
|
||
{ CONN_STATE_STARTWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept },
|
||
{ CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept },
|
||
{ CONN_STATE_IDLE, CONN_EVENT_CONN_REQ, conn_action_connreject },
|
||
{ CONN_STATE_TX, CONN_EVENT_CONN_REQ, conn_action_connreject },
|
||
|
||
{ CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_ACK, conn_action_connack },
|
||
{ CONN_STATE_SETUPWAIT, CONN_EVENT_TIMER, conn_action_conntimsev },
|
||
|
||
{ CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REJ, conn_action_connsever },
|
||
{ CONN_STATE_IDLE, CONN_EVENT_CONN_REJ, conn_action_connsever },
|
||
{ CONN_STATE_TX, CONN_EVENT_CONN_REJ, conn_action_connsever },
|
||
|
||
{ CONN_STATE_IDLE, CONN_EVENT_RX, conn_action_rx },
|
||
{ CONN_STATE_TX, CONN_EVENT_RX, conn_action_rx },
|
||
|
||
{ CONN_STATE_TX, CONN_EVENT_TXDONE, conn_action_txdone },
|
||
{ CONN_STATE_IDLE, CONN_EVENT_TXDONE, conn_action_txdone },
|
||
};
|
||
|
||
static const int CONN_FSM_LEN = sizeof(conn_fsm) / sizeof(fsm_node);
|
||
|
||
|
||
/**
|
||
* Actions for interface - statemachine.
|
||
*****************************************************************************/
|
||
|
||
/**
|
||
* Startup connection by sending CONN_EVENT_START to it.
|
||
*
|
||
* @param fi An instance of an interface statemachine.
|
||
* @param event The event, just happened.
|
||
* @param arg Generic pointer, casted from struct net_device * upon call.
|
||
*/
|
||
static void
|
||
dev_action_start(fsm_instance *fi, int event, void *arg)
|
||
{
|
||
struct net_device *dev = (struct net_device *)arg;
|
||
struct netiucv_priv *privptr = dev->priv;
|
||
struct iucv_event ev;
|
||
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
|
||
ev.conn = privptr->conn;
|
||
fsm_newstate(fi, DEV_STATE_STARTWAIT);
|
||
fsm_event(privptr->conn->fsm, CONN_EVENT_START, &ev);
|
||
}
|
||
|
||
/**
|
||
* Shutdown connection by sending CONN_EVENT_STOP to it.
|
||
*
|
||
* @param fi An instance of an interface statemachine.
|
||
* @param event The event, just happened.
|
||
* @param arg Generic pointer, casted from struct net_device * upon call.
|
||
*/
|
||
static void
|
||
dev_action_stop(fsm_instance *fi, int event, void *arg)
|
||
{
|
||
struct net_device *dev = (struct net_device *)arg;
|
||
struct netiucv_priv *privptr = dev->priv;
|
||
struct iucv_event ev;
|
||
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
|
||
ev.conn = privptr->conn;
|
||
|
||
fsm_newstate(fi, DEV_STATE_STOPWAIT);
|
||
fsm_event(privptr->conn->fsm, CONN_EVENT_STOP, &ev);
|
||
}
|
||
|
||
/**
|
||
* Called from connection statemachine
|
||
* when a connection is up and running.
|
||
*
|
||
* @param fi An instance of an interface statemachine.
|
||
* @param event The event, just happened.
|
||
* @param arg Generic pointer, casted from struct net_device * upon call.
|
||
*/
|
||
static void
|
||
dev_action_connup(fsm_instance *fi, int event, void *arg)
|
||
{
|
||
struct net_device *dev = (struct net_device *)arg;
|
||
struct netiucv_priv *privptr = dev->priv;
|
||
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
|
||
switch (fsm_getstate(fi)) {
|
||
case DEV_STATE_STARTWAIT:
|
||
fsm_newstate(fi, DEV_STATE_RUNNING);
|
||
PRINT_INFO("%s: connected with remote side %s\n",
|
||
dev->name, privptr->conn->userid);
|
||
IUCV_DBF_TEXT(setup, 3,
|
||
"connection is up and running\n");
|
||
break;
|
||
case DEV_STATE_STOPWAIT:
|
||
PRINT_INFO(
|
||
"%s: got connection UP event during shutdown!\n",
|
||
dev->name);
|
||
IUCV_DBF_TEXT(data, 2,
|
||
"dev_action_connup: in DEV_STATE_STOPWAIT\n");
|
||
break;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Called from connection statemachine
|
||
* when a connection has been shutdown.
|
||
*
|
||
* @param fi An instance of an interface statemachine.
|
||
* @param event The event, just happened.
|
||
* @param arg Generic pointer, casted from struct net_device * upon call.
|
||
*/
|
||
static void
|
||
dev_action_conndown(fsm_instance *fi, int event, void *arg)
|
||
{
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
|
||
switch (fsm_getstate(fi)) {
|
||
case DEV_STATE_RUNNING:
|
||
fsm_newstate(fi, DEV_STATE_STARTWAIT);
|
||
break;
|
||
case DEV_STATE_STOPWAIT:
|
||
fsm_newstate(fi, DEV_STATE_STOPPED);
|
||
IUCV_DBF_TEXT(setup, 3, "connection is down\n");
|
||
break;
|
||
}
|
||
}
|
||
|
||
static const fsm_node dev_fsm[] = {
|
||
{ DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start },
|
||
|
||
{ DEV_STATE_STOPWAIT, DEV_EVENT_START, dev_action_start },
|
||
{ DEV_STATE_STOPWAIT, DEV_EVENT_CONDOWN, dev_action_conndown },
|
||
|
||
{ DEV_STATE_STARTWAIT, DEV_EVENT_STOP, dev_action_stop },
|
||
{ DEV_STATE_STARTWAIT, DEV_EVENT_CONUP, dev_action_connup },
|
||
|
||
{ DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop },
|
||
{ DEV_STATE_RUNNING, DEV_EVENT_CONDOWN, dev_action_conndown },
|
||
{ DEV_STATE_RUNNING, DEV_EVENT_CONUP, fsm_action_nop },
|
||
};
|
||
|
||
static const int DEV_FSM_LEN = sizeof(dev_fsm) / sizeof(fsm_node);
|
||
|
||
/**
|
||
* Transmit a packet.
|
||
* This is a helper function for netiucv_tx().
|
||
*
|
||
* @param conn Connection to be used for sending.
|
||
* @param skb Pointer to struct sk_buff of packet to send.
|
||
* The linklevel header has already been set up
|
||
* by netiucv_tx().
|
||
*
|
||
* @return 0 on success, -ERRNO on failure. (Never fails.)
|
||
*/
|
||
static int
|
||
netiucv_transmit_skb(struct iucv_connection *conn, struct sk_buff *skb) {
|
||
unsigned long saveflags;
|
||
ll_header header;
|
||
int rc = 0;
|
||
|
||
if (fsm_getstate(conn->fsm) != CONN_STATE_IDLE) {
|
||
int l = skb->len + NETIUCV_HDRLEN;
|
||
|
||
spin_lock_irqsave(&conn->collect_lock, saveflags);
|
||
if (conn->collect_len + l >
|
||
(conn->max_buffsize - NETIUCV_HDRLEN)) {
|
||
rc = -EBUSY;
|
||
IUCV_DBF_TEXT(data, 2,
|
||
"EBUSY from netiucv_transmit_skb\n");
|
||
} else {
|
||
atomic_inc(&skb->users);
|
||
skb_queue_tail(&conn->collect_queue, skb);
|
||
conn->collect_len += l;
|
||
}
|
||
spin_unlock_irqrestore(&conn->collect_lock, saveflags);
|
||
} else {
|
||
struct sk_buff *nskb = skb;
|
||
/**
|
||
* Copy the skb to a new allocated skb in lowmem only if the
|
||
* data is located above 2G in memory or tailroom is < 2.
|
||
*/
|
||
unsigned long hi =
|
||
((unsigned long)(skb->tail + NETIUCV_HDRLEN)) >> 31;
|
||
int copied = 0;
|
||
if (hi || (skb_tailroom(skb) < 2)) {
|
||
nskb = alloc_skb(skb->len + NETIUCV_HDRLEN +
|
||
NETIUCV_HDRLEN, GFP_ATOMIC | GFP_DMA);
|
||
if (!nskb) {
|
||
PRINT_WARN("%s: Could not allocate tx_skb\n",
|
||
conn->netdev->name);
|
||
IUCV_DBF_TEXT(data, 2, "alloc_skb failed\n");
|
||
rc = -ENOMEM;
|
||
return rc;
|
||
} else {
|
||
skb_reserve(nskb, NETIUCV_HDRLEN);
|
||
memcpy(skb_put(nskb, skb->len),
|
||
skb->data, skb->len);
|
||
}
|
||
copied = 1;
|
||
}
|
||
/**
|
||
* skb now is below 2G and has enough room. Add headers.
|
||
*/
|
||
header.next = nskb->len + NETIUCV_HDRLEN;
|
||
memcpy(skb_push(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN);
|
||
header.next = 0;
|
||
memcpy(skb_put(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN);
|
||
|
||
fsm_newstate(conn->fsm, CONN_STATE_TX);
|
||
conn->prof.send_stamp = xtime;
|
||
|
||
rc = iucv_send(conn->pathid, NULL, 0, 0, 1 /* single_flag */,
|
||
0, nskb->data, nskb->len);
|
||
/* Shut up, gcc! nskb is always below 2G. */
|
||
conn->prof.doios_single++;
|
||
conn->prof.txlen += skb->len;
|
||
conn->prof.tx_pending++;
|
||
if (conn->prof.tx_pending > conn->prof.tx_max_pending)
|
||
conn->prof.tx_max_pending = conn->prof.tx_pending;
|
||
if (rc) {
|
||
struct netiucv_priv *privptr;
|
||
fsm_newstate(conn->fsm, CONN_STATE_IDLE);
|
||
conn->prof.tx_pending--;
|
||
privptr = (struct netiucv_priv *)conn->netdev->priv;
|
||
if (privptr)
|
||
privptr->stats.tx_errors++;
|
||
if (copied)
|
||
dev_kfree_skb(nskb);
|
||
else {
|
||
/**
|
||
* Remove our headers. They get added
|
||
* again on retransmit.
|
||
*/
|
||
skb_pull(skb, NETIUCV_HDRLEN);
|
||
skb_trim(skb, skb->len - NETIUCV_HDRLEN);
|
||
}
|
||
PRINT_WARN("iucv_send returned %08x\n", rc);
|
||
IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc);
|
||
} else {
|
||
if (copied)
|
||
dev_kfree_skb(skb);
|
||
atomic_inc(&nskb->users);
|
||
skb_queue_tail(&conn->commit_queue, nskb);
|
||
}
|
||
}
|
||
|
||
return rc;
|
||
}
|
||
|
||
/**
|
||
* Interface API for upper network layers
|
||
*****************************************************************************/
|
||
|
||
/**
|
||
* Open an interface.
|
||
* Called from generic network layer when ifconfig up is run.
|
||
*
|
||
* @param dev Pointer to interface struct.
|
||
*
|
||
* @return 0 on success, -ERRNO on failure. (Never fails.)
|
||
*/
|
||
static int
|
||
netiucv_open(struct net_device *dev) {
|
||
fsm_event(((struct netiucv_priv *)dev->priv)->fsm, DEV_EVENT_START,dev);
|
||
return 0;
|
||
}
|
||
|
||
/**
|
||
* Close an interface.
|
||
* Called from generic network layer when ifconfig down is run.
|
||
*
|
||
* @param dev Pointer to interface struct.
|
||
*
|
||
* @return 0 on success, -ERRNO on failure. (Never fails.)
|
||
*/
|
||
static int
|
||
netiucv_close(struct net_device *dev) {
|
||
fsm_event(((struct netiucv_priv *)dev->priv)->fsm, DEV_EVENT_STOP, dev);
|
||
return 0;
|
||
}
|
||
|
||
/**
|
||
* Start transmission of a packet.
|
||
* Called from generic network device layer.
|
||
*
|
||
* @param skb Pointer to buffer containing the packet.
|
||
* @param dev Pointer to interface struct.
|
||
*
|
||
* @return 0 if packet consumed, !0 if packet rejected.
|
||
* Note: If we return !0, then the packet is free'd by
|
||
* the generic network layer.
|
||
*/
|
||
static int netiucv_tx(struct sk_buff *skb, struct net_device *dev)
|
||
{
|
||
int rc = 0;
|
||
struct netiucv_priv *privptr = dev->priv;
|
||
|
||
IUCV_DBF_TEXT(trace, 4, __FUNCTION__);
|
||
/**
|
||
* Some sanity checks ...
|
||
*/
|
||
if (skb == NULL) {
|
||
PRINT_WARN("%s: NULL sk_buff passed\n", dev->name);
|
||
IUCV_DBF_TEXT(data, 2, "netiucv_tx: skb is NULL\n");
|
||
privptr->stats.tx_dropped++;
|
||
return 0;
|
||
}
|
||
if (skb_headroom(skb) < NETIUCV_HDRLEN) {
|
||
PRINT_WARN("%s: Got sk_buff with head room < %ld bytes\n",
|
||
dev->name, NETIUCV_HDRLEN);
|
||
IUCV_DBF_TEXT(data, 2,
|
||
"netiucv_tx: skb_headroom < NETIUCV_HDRLEN\n");
|
||
dev_kfree_skb(skb);
|
||
privptr->stats.tx_dropped++;
|
||
return 0;
|
||
}
|
||
|
||
/**
|
||
* If connection is not running, try to restart it
|
||
* and throw away packet.
|
||
*/
|
||
if (fsm_getstate(privptr->fsm) != DEV_STATE_RUNNING) {
|
||
fsm_event(privptr->fsm, DEV_EVENT_START, dev);
|
||
dev_kfree_skb(skb);
|
||
privptr->stats.tx_dropped++;
|
||
privptr->stats.tx_errors++;
|
||
privptr->stats.tx_carrier_errors++;
|
||
return 0;
|
||
}
|
||
|
||
if (netiucv_test_and_set_busy(dev)) {
|
||
IUCV_DBF_TEXT(data, 2, "EBUSY from netiucv_tx\n");
|
||
return -EBUSY;
|
||
}
|
||
dev->trans_start = jiffies;
|
||
if (netiucv_transmit_skb(privptr->conn, skb))
|
||
rc = 1;
|
||
netiucv_clear_busy(dev);
|
||
return rc;
|
||
}
|
||
|
||
/**
|
||
* Returns interface statistics of a device.
|
||
*
|
||
* @param dev Pointer to interface struct.
|
||
*
|
||
* @return Pointer to stats struct of this interface.
|
||
*/
|
||
static struct net_device_stats *
|
||
netiucv_stats (struct net_device * dev)
|
||
{
|
||
IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
|
||
return &((struct netiucv_priv *)dev->priv)->stats;
|
||
}
|
||
|
||
/**
|
||
* Sets MTU of an interface.
|
||
*
|
||
* @param dev Pointer to interface struct.
|
||
* @param new_mtu The new MTU to use for this interface.
|
||
*
|
||
* @return 0 on success, -EINVAL if MTU is out of valid range.
|
||
* (valid range is 576 .. NETIUCV_MTU_MAX).
|
||
*/
|
||
static int
|
||
netiucv_change_mtu (struct net_device * dev, int new_mtu)
|
||
{
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
if ((new_mtu < 576) || (new_mtu > NETIUCV_MTU_MAX)) {
|
||
IUCV_DBF_TEXT(setup, 2, "given MTU out of valid range\n");
|
||
return -EINVAL;
|
||
}
|
||
dev->mtu = new_mtu;
|
||
return 0;
|
||
}
|
||
|
||
/**
|
||
* attributes in sysfs
|
||
*****************************************************************************/
|
||
|
||
static ssize_t
|
||
user_show (struct device *dev, struct device_attribute *attr, char *buf)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
|
||
IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
|
||
return sprintf(buf, "%s\n", netiucv_printname(priv->conn->userid));
|
||
}
|
||
|
||
static ssize_t
|
||
user_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
struct net_device *ndev = priv->conn->netdev;
|
||
char *p;
|
||
char *tmp;
|
||
char username[10];
|
||
int i;
|
||
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
if (count>9) {
|
||
PRINT_WARN("netiucv: username too long (%d)!\n", (int)count);
|
||
IUCV_DBF_TEXT_(setup, 2,
|
||
"%d is length of username\n", (int)count);
|
||
return -EINVAL;
|
||
}
|
||
|
||
tmp = strsep((char **) &buf, "\n");
|
||
for (i=0, p=tmp; i<8 && *p; i++, p++) {
|
||
if (isalnum(*p) || (*p == '$'))
|
||
username[i]= *p;
|
||
else if (*p == '\n') {
|
||
/* trailing lf, grr */
|
||
break;
|
||
} else {
|
||
PRINT_WARN("netiucv: Invalid char %c in username!\n",
|
||
*p);
|
||
IUCV_DBF_TEXT_(setup, 2,
|
||
"username: invalid character %c\n",
|
||
*p);
|
||
return -EINVAL;
|
||
}
|
||
}
|
||
while (i<9)
|
||
username[i++] = ' ';
|
||
username[9] = '\0';
|
||
|
||
if (memcmp(username, priv->conn->userid, 8)) {
|
||
/* username changed */
|
||
if (ndev->flags & (IFF_UP | IFF_RUNNING)) {
|
||
PRINT_WARN(
|
||
"netiucv: device %s active, connected to %s\n",
|
||
dev->bus_id, priv->conn->userid);
|
||
PRINT_WARN("netiucv: user cannot be updated\n");
|
||
IUCV_DBF_TEXT(setup, 2, "user_write: device active\n");
|
||
return -EBUSY;
|
||
}
|
||
}
|
||
memcpy(priv->conn->userid, username, 9);
|
||
|
||
return count;
|
||
|
||
}
|
||
|
||
static DEVICE_ATTR(user, 0644, user_show, user_write);
|
||
|
||
static ssize_t
|
||
buffer_show (struct device *dev, struct device_attribute *attr, char *buf)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
|
||
IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
|
||
return sprintf(buf, "%d\n", priv->conn->max_buffsize);
|
||
}
|
||
|
||
static ssize_t
|
||
buffer_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
struct net_device *ndev = priv->conn->netdev;
|
||
char *e;
|
||
int bs1;
|
||
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
if (count >= 39)
|
||
return -EINVAL;
|
||
|
||
bs1 = simple_strtoul(buf, &e, 0);
|
||
|
||
if (e && (!isspace(*e))) {
|
||
PRINT_WARN("netiucv: Invalid character in buffer!\n");
|
||
IUCV_DBF_TEXT_(setup, 2, "buffer_write: invalid char %c\n", *e);
|
||
return -EINVAL;
|
||
}
|
||
if (bs1 > NETIUCV_BUFSIZE_MAX) {
|
||
PRINT_WARN("netiucv: Given buffer size %d too large.\n",
|
||
bs1);
|
||
IUCV_DBF_TEXT_(setup, 2,
|
||
"buffer_write: buffer size %d too large\n",
|
||
bs1);
|
||
return -EINVAL;
|
||
}
|
||
if ((ndev->flags & IFF_RUNNING) &&
|
||
(bs1 < (ndev->mtu + NETIUCV_HDRLEN + 2))) {
|
||
PRINT_WARN("netiucv: Given buffer size %d too small.\n",
|
||
bs1);
|
||
IUCV_DBF_TEXT_(setup, 2,
|
||
"buffer_write: buffer size %d too small\n",
|
||
bs1);
|
||
return -EINVAL;
|
||
}
|
||
if (bs1 < (576 + NETIUCV_HDRLEN + NETIUCV_HDRLEN)) {
|
||
PRINT_WARN("netiucv: Given buffer size %d too small.\n",
|
||
bs1);
|
||
IUCV_DBF_TEXT_(setup, 2,
|
||
"buffer_write: buffer size %d too small\n",
|
||
bs1);
|
||
return -EINVAL;
|
||
}
|
||
|
||
priv->conn->max_buffsize = bs1;
|
||
if (!(ndev->flags & IFF_RUNNING))
|
||
ndev->mtu = bs1 - NETIUCV_HDRLEN - NETIUCV_HDRLEN;
|
||
|
||
return count;
|
||
|
||
}
|
||
|
||
static DEVICE_ATTR(buffer, 0644, buffer_show, buffer_write);
|
||
|
||
static ssize_t
|
||
dev_fsm_show (struct device *dev, struct device_attribute *attr, char *buf)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
|
||
IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
|
||
return sprintf(buf, "%s\n", fsm_getstate_str(priv->fsm));
|
||
}
|
||
|
||
static DEVICE_ATTR(device_fsm_state, 0444, dev_fsm_show, NULL);
|
||
|
||
static ssize_t
|
||
conn_fsm_show (struct device *dev, struct device_attribute *attr, char *buf)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
|
||
IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
|
||
return sprintf(buf, "%s\n", fsm_getstate_str(priv->conn->fsm));
|
||
}
|
||
|
||
static DEVICE_ATTR(connection_fsm_state, 0444, conn_fsm_show, NULL);
|
||
|
||
static ssize_t
|
||
maxmulti_show (struct device *dev, struct device_attribute *attr, char *buf)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
|
||
IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
|
||
return sprintf(buf, "%ld\n", priv->conn->prof.maxmulti);
|
||
}
|
||
|
||
static ssize_t
|
||
maxmulti_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
|
||
IUCV_DBF_TEXT(trace, 4, __FUNCTION__);
|
||
priv->conn->prof.maxmulti = 0;
|
||
return count;
|
||
}
|
||
|
||
static DEVICE_ATTR(max_tx_buffer_used, 0644, maxmulti_show, maxmulti_write);
|
||
|
||
static ssize_t
|
||
maxcq_show (struct device *dev, struct device_attribute *attr, char *buf)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
|
||
IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
|
||
return sprintf(buf, "%ld\n", priv->conn->prof.maxcqueue);
|
||
}
|
||
|
||
static ssize_t
|
||
maxcq_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
|
||
IUCV_DBF_TEXT(trace, 4, __FUNCTION__);
|
||
priv->conn->prof.maxcqueue = 0;
|
||
return count;
|
||
}
|
||
|
||
static DEVICE_ATTR(max_chained_skbs, 0644, maxcq_show, maxcq_write);
|
||
|
||
static ssize_t
|
||
sdoio_show (struct device *dev, struct device_attribute *attr, char *buf)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
|
||
IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
|
||
return sprintf(buf, "%ld\n", priv->conn->prof.doios_single);
|
||
}
|
||
|
||
static ssize_t
|
||
sdoio_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
|
||
IUCV_DBF_TEXT(trace, 4, __FUNCTION__);
|
||
priv->conn->prof.doios_single = 0;
|
||
return count;
|
||
}
|
||
|
||
static DEVICE_ATTR(tx_single_write_ops, 0644, sdoio_show, sdoio_write);
|
||
|
||
static ssize_t
|
||
mdoio_show (struct device *dev, struct device_attribute *attr, char *buf)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
|
||
IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
|
||
return sprintf(buf, "%ld\n", priv->conn->prof.doios_multi);
|
||
}
|
||
|
||
static ssize_t
|
||
mdoio_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
|
||
IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
|
||
priv->conn->prof.doios_multi = 0;
|
||
return count;
|
||
}
|
||
|
||
static DEVICE_ATTR(tx_multi_write_ops, 0644, mdoio_show, mdoio_write);
|
||
|
||
static ssize_t
|
||
txlen_show (struct device *dev, struct device_attribute *attr, char *buf)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
|
||
IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
|
||
return sprintf(buf, "%ld\n", priv->conn->prof.txlen);
|
||
}
|
||
|
||
static ssize_t
|
||
txlen_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
|
||
IUCV_DBF_TEXT(trace, 4, __FUNCTION__);
|
||
priv->conn->prof.txlen = 0;
|
||
return count;
|
||
}
|
||
|
||
static DEVICE_ATTR(netto_bytes, 0644, txlen_show, txlen_write);
|
||
|
||
static ssize_t
|
||
txtime_show (struct device *dev, struct device_attribute *attr, char *buf)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
|
||
IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
|
||
return sprintf(buf, "%ld\n", priv->conn->prof.tx_time);
|
||
}
|
||
|
||
static ssize_t
|
||
txtime_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
|
||
IUCV_DBF_TEXT(trace, 4, __FUNCTION__);
|
||
priv->conn->prof.tx_time = 0;
|
||
return count;
|
||
}
|
||
|
||
static DEVICE_ATTR(max_tx_io_time, 0644, txtime_show, txtime_write);
|
||
|
||
static ssize_t
|
||
txpend_show (struct device *dev, struct device_attribute *attr, char *buf)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
|
||
IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
|
||
return sprintf(buf, "%ld\n", priv->conn->prof.tx_pending);
|
||
}
|
||
|
||
static ssize_t
|
||
txpend_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
|
||
IUCV_DBF_TEXT(trace, 4, __FUNCTION__);
|
||
priv->conn->prof.tx_pending = 0;
|
||
return count;
|
||
}
|
||
|
||
static DEVICE_ATTR(tx_pending, 0644, txpend_show, txpend_write);
|
||
|
||
static ssize_t
|
||
txmpnd_show (struct device *dev, struct device_attribute *attr, char *buf)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
|
||
IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
|
||
return sprintf(buf, "%ld\n", priv->conn->prof.tx_max_pending);
|
||
}
|
||
|
||
static ssize_t
|
||
txmpnd_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
|
||
{
|
||
struct netiucv_priv *priv = dev->driver_data;
|
||
|
||
IUCV_DBF_TEXT(trace, 4, __FUNCTION__);
|
||
priv->conn->prof.tx_max_pending = 0;
|
||
return count;
|
||
}
|
||
|
||
static DEVICE_ATTR(tx_max_pending, 0644, txmpnd_show, txmpnd_write);
|
||
|
||
static struct attribute *netiucv_attrs[] = {
|
||
&dev_attr_buffer.attr,
|
||
&dev_attr_user.attr,
|
||
NULL,
|
||
};
|
||
|
||
static struct attribute_group netiucv_attr_group = {
|
||
.attrs = netiucv_attrs,
|
||
};
|
||
|
||
static struct attribute *netiucv_stat_attrs[] = {
|
||
&dev_attr_device_fsm_state.attr,
|
||
&dev_attr_connection_fsm_state.attr,
|
||
&dev_attr_max_tx_buffer_used.attr,
|
||
&dev_attr_max_chained_skbs.attr,
|
||
&dev_attr_tx_single_write_ops.attr,
|
||
&dev_attr_tx_multi_write_ops.attr,
|
||
&dev_attr_netto_bytes.attr,
|
||
&dev_attr_max_tx_io_time.attr,
|
||
&dev_attr_tx_pending.attr,
|
||
&dev_attr_tx_max_pending.attr,
|
||
NULL,
|
||
};
|
||
|
||
static struct attribute_group netiucv_stat_attr_group = {
|
||
.name = "stats",
|
||
.attrs = netiucv_stat_attrs,
|
||
};
|
||
|
||
static inline int
|
||
netiucv_add_files(struct device *dev)
|
||
{
|
||
int ret;
|
||
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
ret = sysfs_create_group(&dev->kobj, &netiucv_attr_group);
|
||
if (ret)
|
||
return ret;
|
||
ret = sysfs_create_group(&dev->kobj, &netiucv_stat_attr_group);
|
||
if (ret)
|
||
sysfs_remove_group(&dev->kobj, &netiucv_attr_group);
|
||
return ret;
|
||
}
|
||
|
||
static inline void
|
||
netiucv_remove_files(struct device *dev)
|
||
{
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
sysfs_remove_group(&dev->kobj, &netiucv_stat_attr_group);
|
||
sysfs_remove_group(&dev->kobj, &netiucv_attr_group);
|
||
}
|
||
|
||
static int
|
||
netiucv_register_device(struct net_device *ndev)
|
||
{
|
||
struct netiucv_priv *priv = ndev->priv;
|
||
struct device *dev = kmalloc(sizeof(struct device), GFP_KERNEL);
|
||
int ret;
|
||
|
||
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
|
||
if (dev) {
|
||
memset(dev, 0, sizeof(struct device));
|
||
snprintf(dev->bus_id, BUS_ID_SIZE, "net%s", ndev->name);
|
||
dev->bus = &iucv_bus;
|
||
dev->parent = iucv_root;
|
||
/*
|
||
* The release function could be called after the
|
||
* module has been unloaded. It's _only_ task is to
|
||
* free the struct. Therefore, we specify kfree()
|
||
* directly here. (Probably a little bit obfuscating
|
||
* but legitime ...).
|
||
*/
|
||
dev->release = (void (*)(struct device *))kfree;
|
||
dev->driver = &netiucv_driver;
|
||
} else
|
||
return -ENOMEM;
|
||
|
||
ret = device_register(dev);
|
||
|
||
if (ret)
|
||
return ret;
|
||
ret = netiucv_add_files(dev);
|
||
if (ret)
|
||
goto out_unreg;
|
||
priv->dev = dev;
|
||
dev->driver_data = priv;
|
||
return 0;
|
||
|
||
out_unreg:
|
||
device_unregister(dev);
|
||
return ret;
|
||
}
|
||
|
||
static void
|
||
netiucv_unregister_device(struct device *dev)
|
||
{
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
netiucv_remove_files(dev);
|
||
device_unregister(dev);
|
||
}
|
||
|
||
/**
|
||
* Allocate and initialize a new connection structure.
|
||
* Add it to the list of netiucv connections;
|
||
*/
|
||
static struct iucv_connection *
|
||
netiucv_new_connection(struct net_device *dev, char *username)
|
||
{
|
||
struct iucv_connection **clist = &iucv_connections;
|
||
struct iucv_connection *conn =
|
||
(struct iucv_connection *)
|
||
kmalloc(sizeof(struct iucv_connection), GFP_KERNEL);
|
||
|
||
if (conn) {
|
||
memset(conn, 0, sizeof(struct iucv_connection));
|
||
skb_queue_head_init(&conn->collect_queue);
|
||
skb_queue_head_init(&conn->commit_queue);
|
||
conn->max_buffsize = NETIUCV_BUFSIZE_DEFAULT;
|
||
conn->netdev = dev;
|
||
|
||
conn->rx_buff = alloc_skb(NETIUCV_BUFSIZE_DEFAULT,
|
||
GFP_KERNEL | GFP_DMA);
|
||
if (!conn->rx_buff) {
|
||
kfree(conn);
|
||
return NULL;
|
||
}
|
||
conn->tx_buff = alloc_skb(NETIUCV_BUFSIZE_DEFAULT,
|
||
GFP_KERNEL | GFP_DMA);
|
||
if (!conn->tx_buff) {
|
||
kfree_skb(conn->rx_buff);
|
||
kfree(conn);
|
||
return NULL;
|
||
}
|
||
conn->fsm = init_fsm("netiucvconn", conn_state_names,
|
||
conn_event_names, NR_CONN_STATES,
|
||
NR_CONN_EVENTS, conn_fsm, CONN_FSM_LEN,
|
||
GFP_KERNEL);
|
||
if (!conn->fsm) {
|
||
kfree_skb(conn->tx_buff);
|
||
kfree_skb(conn->rx_buff);
|
||
kfree(conn);
|
||
return NULL;
|
||
}
|
||
fsm_settimer(conn->fsm, &conn->timer);
|
||
fsm_newstate(conn->fsm, CONN_STATE_INVALID);
|
||
|
||
if (username) {
|
||
memcpy(conn->userid, username, 9);
|
||
fsm_newstate(conn->fsm, CONN_STATE_STOPPED);
|
||
}
|
||
|
||
conn->next = *clist;
|
||
*clist = conn;
|
||
}
|
||
return conn;
|
||
}
|
||
|
||
/**
|
||
* Release a connection structure and remove it from the
|
||
* list of netiucv connections.
|
||
*/
|
||
static void
|
||
netiucv_remove_connection(struct iucv_connection *conn)
|
||
{
|
||
struct iucv_connection **clist = &iucv_connections;
|
||
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
if (conn == NULL)
|
||
return;
|
||
while (*clist) {
|
||
if (*clist == conn) {
|
||
*clist = conn->next;
|
||
if (conn->handle) {
|
||
iucv_unregister_program(conn->handle);
|
||
conn->handle = NULL;
|
||
}
|
||
fsm_deltimer(&conn->timer);
|
||
kfree_fsm(conn->fsm);
|
||
kfree_skb(conn->rx_buff);
|
||
kfree_skb(conn->tx_buff);
|
||
return;
|
||
}
|
||
clist = &((*clist)->next);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Release everything of a net device.
|
||
*/
|
||
static void
|
||
netiucv_free_netdevice(struct net_device *dev)
|
||
{
|
||
struct netiucv_priv *privptr;
|
||
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
|
||
if (!dev)
|
||
return;
|
||
|
||
privptr = (struct netiucv_priv *)dev->priv;
|
||
if (privptr) {
|
||
if (privptr->conn)
|
||
netiucv_remove_connection(privptr->conn);
|
||
if (privptr->fsm)
|
||
kfree_fsm(privptr->fsm);
|
||
privptr->conn = NULL; privptr->fsm = NULL;
|
||
/* privptr gets freed by free_netdev() */
|
||
}
|
||
free_netdev(dev);
|
||
}
|
||
|
||
/**
|
||
* Initialize a net device. (Called from kernel in alloc_netdev())
|
||
*/
|
||
static void
|
||
netiucv_setup_netdevice(struct net_device *dev)
|
||
{
|
||
memset(dev->priv, 0, sizeof(struct netiucv_priv));
|
||
|
||
dev->mtu = NETIUCV_MTU_DEFAULT;
|
||
dev->hard_start_xmit = netiucv_tx;
|
||
dev->open = netiucv_open;
|
||
dev->stop = netiucv_close;
|
||
dev->get_stats = netiucv_stats;
|
||
dev->change_mtu = netiucv_change_mtu;
|
||
dev->destructor = netiucv_free_netdevice;
|
||
dev->hard_header_len = NETIUCV_HDRLEN;
|
||
dev->addr_len = 0;
|
||
dev->type = ARPHRD_SLIP;
|
||
dev->tx_queue_len = NETIUCV_QUEUELEN_DEFAULT;
|
||
dev->flags = IFF_POINTOPOINT | IFF_NOARP;
|
||
SET_MODULE_OWNER(dev);
|
||
}
|
||
|
||
/**
|
||
* Allocate and initialize everything of a net device.
|
||
*/
|
||
static struct net_device *
|
||
netiucv_init_netdevice(char *username)
|
||
{
|
||
struct netiucv_priv *privptr;
|
||
struct net_device *dev;
|
||
|
||
dev = alloc_netdev(sizeof(struct netiucv_priv), "iucv%d",
|
||
netiucv_setup_netdevice);
|
||
if (!dev)
|
||
return NULL;
|
||
if (dev_alloc_name(dev, dev->name) < 0) {
|
||
free_netdev(dev);
|
||
return NULL;
|
||
}
|
||
|
||
privptr = (struct netiucv_priv *)dev->priv;
|
||
privptr->fsm = init_fsm("netiucvdev", dev_state_names,
|
||
dev_event_names, NR_DEV_STATES, NR_DEV_EVENTS,
|
||
dev_fsm, DEV_FSM_LEN, GFP_KERNEL);
|
||
if (!privptr->fsm) {
|
||
free_netdev(dev);
|
||
return NULL;
|
||
}
|
||
privptr->conn = netiucv_new_connection(dev, username);
|
||
if (!privptr->conn) {
|
||
kfree_fsm(privptr->fsm);
|
||
free_netdev(dev);
|
||
IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_new_connection\n");
|
||
return NULL;
|
||
}
|
||
fsm_newstate(privptr->fsm, DEV_STATE_STOPPED);
|
||
|
||
return dev;
|
||
}
|
||
|
||
static ssize_t
|
||
conn_write(struct device_driver *drv, const char *buf, size_t count)
|
||
{
|
||
char *p;
|
||
char username[10];
|
||
int i, ret;
|
||
struct net_device *dev;
|
||
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
if (count>9) {
|
||
PRINT_WARN("netiucv: username too long (%d)!\n", (int)count);
|
||
IUCV_DBF_TEXT(setup, 2, "conn_write: too long\n");
|
||
return -EINVAL;
|
||
}
|
||
|
||
for (i=0, p=(char *)buf; i<8 && *p; i++, p++) {
|
||
if (isalnum(*p) || (*p == '$'))
|
||
username[i]= *p;
|
||
else if (*p == '\n') {
|
||
/* trailing lf, grr */
|
||
break;
|
||
} else {
|
||
PRINT_WARN("netiucv: Invalid character in username!\n");
|
||
IUCV_DBF_TEXT_(setup, 2,
|
||
"conn_write: invalid character %c\n", *p);
|
||
return -EINVAL;
|
||
}
|
||
}
|
||
while (i<9)
|
||
username[i++] = ' ';
|
||
username[9] = '\0';
|
||
dev = netiucv_init_netdevice(username);
|
||
if (!dev) {
|
||
PRINT_WARN(
|
||
"netiucv: Could not allocate network device structure "
|
||
"for user '%s'\n", netiucv_printname(username));
|
||
IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_init_netdevice\n");
|
||
return -ENODEV;
|
||
}
|
||
|
||
if ((ret = netiucv_register_device(dev))) {
|
||
IUCV_DBF_TEXT_(setup, 2,
|
||
"ret %d from netiucv_register_device\n", ret);
|
||
goto out_free_ndev;
|
||
}
|
||
|
||
/* sysfs magic */
|
||
SET_NETDEV_DEV(dev,
|
||
(struct device*)((struct netiucv_priv*)dev->priv)->dev);
|
||
|
||
if ((ret = register_netdev(dev))) {
|
||
netiucv_unregister_device((struct device*)
|
||
((struct netiucv_priv*)dev->priv)->dev);
|
||
goto out_free_ndev;
|
||
}
|
||
|
||
PRINT_INFO("%s: '%s'\n", dev->name, netiucv_printname(username));
|
||
|
||
return count;
|
||
|
||
out_free_ndev:
|
||
PRINT_WARN("netiucv: Could not register '%s'\n", dev->name);
|
||
IUCV_DBF_TEXT(setup, 2, "conn_write: could not register\n");
|
||
netiucv_free_netdevice(dev);
|
||
return ret;
|
||
}
|
||
|
||
DRIVER_ATTR(connection, 0200, NULL, conn_write);
|
||
|
||
static ssize_t
|
||
remove_write (struct device_driver *drv, const char *buf, size_t count)
|
||
{
|
||
struct iucv_connection **clist = &iucv_connections;
|
||
struct net_device *ndev;
|
||
struct netiucv_priv *priv;
|
||
struct device *dev;
|
||
char name[IFNAMSIZ];
|
||
char *p;
|
||
int i;
|
||
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
|
||
if (count >= IFNAMSIZ)
|
||
count = IFNAMSIZ-1;
|
||
|
||
for (i=0, p=(char *)buf; i<count && *p; i++, p++) {
|
||
if ((*p == '\n') | (*p == ' ')) {
|
||
/* trailing lf, grr */
|
||
break;
|
||
} else {
|
||
name[i]=*p;
|
||
}
|
||
}
|
||
name[i] = '\0';
|
||
|
||
while (*clist) {
|
||
ndev = (*clist)->netdev;
|
||
priv = (struct netiucv_priv*)ndev->priv;
|
||
dev = priv->dev;
|
||
|
||
if (strncmp(name, ndev->name, count)) {
|
||
clist = &((*clist)->next);
|
||
continue;
|
||
}
|
||
if (ndev->flags & (IFF_UP | IFF_RUNNING)) {
|
||
PRINT_WARN(
|
||
"netiucv: net device %s active with peer %s\n",
|
||
ndev->name, priv->conn->userid);
|
||
PRINT_WARN("netiucv: %s cannot be removed\n",
|
||
ndev->name);
|
||
IUCV_DBF_TEXT(data, 2, "remove_write: still active\n");
|
||
return -EBUSY;
|
||
}
|
||
unregister_netdev(ndev);
|
||
netiucv_unregister_device(dev);
|
||
return count;
|
||
}
|
||
PRINT_WARN("netiucv: net device %s unknown\n", name);
|
||
IUCV_DBF_TEXT(data, 2, "remove_write: unknown device\n");
|
||
return -EINVAL;
|
||
}
|
||
|
||
DRIVER_ATTR(remove, 0200, NULL, remove_write);
|
||
|
||
static void
|
||
netiucv_banner(void)
|
||
{
|
||
char vbuf[] = "$Revision: 1.69 $";
|
||
char *version = vbuf;
|
||
|
||
if ((version = strchr(version, ':'))) {
|
||
char *p = strchr(version + 1, '$');
|
||
if (p)
|
||
*p = '\0';
|
||
} else
|
||
version = " ??? ";
|
||
PRINT_INFO("NETIUCV driver Version%s initialized\n", version);
|
||
}
|
||
|
||
static void __exit
|
||
netiucv_exit(void)
|
||
{
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
while (iucv_connections) {
|
||
struct net_device *ndev = iucv_connections->netdev;
|
||
struct netiucv_priv *priv = (struct netiucv_priv*)ndev->priv;
|
||
struct device *dev = priv->dev;
|
||
|
||
unregister_netdev(ndev);
|
||
netiucv_unregister_device(dev);
|
||
}
|
||
|
||
driver_remove_file(&netiucv_driver, &driver_attr_connection);
|
||
driver_remove_file(&netiucv_driver, &driver_attr_remove);
|
||
driver_unregister(&netiucv_driver);
|
||
iucv_unregister_dbf_views();
|
||
|
||
PRINT_INFO("NETIUCV driver unloaded\n");
|
||
return;
|
||
}
|
||
|
||
static int __init
|
||
netiucv_init(void)
|
||
{
|
||
int ret;
|
||
|
||
ret = iucv_register_dbf_views();
|
||
if (ret) {
|
||
PRINT_WARN("netiucv_init failed, "
|
||
"iucv_register_dbf_views rc = %d\n", ret);
|
||
return ret;
|
||
}
|
||
IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
|
||
ret = driver_register(&netiucv_driver);
|
||
if (ret) {
|
||
PRINT_ERR("NETIUCV: failed to register driver.\n");
|
||
IUCV_DBF_TEXT_(setup, 2, "ret %d from driver_register\n", ret);
|
||
iucv_unregister_dbf_views();
|
||
return ret;
|
||
}
|
||
|
||
/* Add entry for specifying connections. */
|
||
ret = driver_create_file(&netiucv_driver, &driver_attr_connection);
|
||
if (!ret) {
|
||
ret = driver_create_file(&netiucv_driver, &driver_attr_remove);
|
||
netiucv_banner();
|
||
} else {
|
||
PRINT_ERR("NETIUCV: failed to add driver attribute.\n");
|
||
IUCV_DBF_TEXT_(setup, 2, "ret %d from driver_create_file\n", ret);
|
||
driver_unregister(&netiucv_driver);
|
||
iucv_unregister_dbf_views();
|
||
}
|
||
return ret;
|
||
}
|
||
|
||
module_init(netiucv_init);
|
||
module_exit(netiucv_exit);
|
||
MODULE_LICENSE("GPL");
|