netiucv.c
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- /*
- * $Id: netiucv.c,v 1.16 2001/12/03 14:28:45 felfert Exp $
- *
- * IUCV network driver
- *
- * Copyright (C) 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation
- * Author(s): Fritz Elfert (elfert@de.ibm.com, felfert@millenux.com)
- *
- * Documentation used:
- * the source of the original IUCV driver by:
- * Stefan Hegewald <hegewald@de.ibm.com>
- * Hartmut Penner <hpenner@de.ibm.com>
- * Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
- * Martin Schwidefsky (schwidefsky@de.ibm.com)
- * Alan Altmark (Alan_Altmark@us.ibm.com) Sept. 2000
- *
- * 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, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * RELEASE-TAG: IUCV network driver $Revision: 1.16 $
- *
- */
- #include <linux/version.h>
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/kernel.h>
- #include <linux/slab.h>
- #include <linux/errno.h>
- #include <linux/types.h>
- #include <linux/interrupt.h>
- #include <linux/timer.h>
- #include <linux/sched.h>
- #include <linux/signal.h>
- #include <linux/string.h>
- #include <linux/proc_fs.h>
- #include <linux/ip.h>
- #include <linux/if_arp.h>
- #include <linux/tcp.h>
- #include <linux/skbuff.h>
- #include <linux/ctype.h>
- #include <net/dst.h>
- #include <asm/io.h>
- #include <asm/bitops.h>
- #include <asm/uaccess.h>
- #include "iucv.h"
- #include "fsm.h"
- #undef DEBUG
- #ifdef MODULE
- MODULE_AUTHOR
- ("(C) 2001 IBM Corporation by Fritz Elfert (felfert@millenux.com)");
- MODULE_DESCRIPTION ("Linux for S/390 IUCV network driver");
- MODULE_PARM (iucv, "1s");
- MODULE_PARM_DESC (iucv,
- "Specify the initial remote userids for iucv0 .. iucvn:n"
- "iucv=userid0:userid1:...:useridNn");
- #endif
- static char *iucv = "";
- /**
- * compatibility stuff
- */
- #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0))
- typedef struct net_device net_device;
- #else
- typedef struct device net_device;
- #endif
- /**
- * Per connection profiling data
- */
- typedef struct connection_profile_t {
- unsigned long maxmulti;
- unsigned long maxcqueue;
- unsigned long doios_single;
- unsigned long doios_multi;
- unsigned long txlen;
- unsigned long tx_time;
- struct timeval send_stamp;
- } connection_profile;
- /**
- * Representation of one iucv connection
- */
- typedef struct iucv_connection_t {
- struct iucv_connection_t *next;
- iucv_handle_t handle;
- __u16 pathid;
- struct sk_buff *rx_buff;
- struct sk_buff *tx_buff;
- struct sk_buff_head collect_queue;
- spinlock_t collect_lock;
- int collect_len;
- int max_buffsize;
- int flags;
- fsm_timer timer;
- int retry;
- fsm_instance *fsm;
- net_device *netdev;
- connection_profile prof;
- char userid[9];
- } iucv_connection;
- #define CONN_FLAGS_BUFSIZE_CHANGED 1
- /**
- * Linked list of all connection structs.
- */
- iucv_connection *connections;
- /**
- * Representation of event-data for the
- * connection state machine.
- */
- typedef struct iucv_event_t {
- iucv_connection *conn;
- void *data;
- } iucv_event;
- /**
- * Private part of the network device structure
- */
- typedef struct netiucv_priv_t {
- struct net_device_stats stats;
- #if LINUX_VERSION_CODE >= 0x02032D
- unsigned long tbusy;
- #endif
- fsm_instance *fsm;
- iucv_connection *conn;
- struct proc_dir_entry *proc_dentry;
- struct proc_dir_entry *proc_stat_entry;
- struct proc_dir_entry *proc_buffer_entry;
- struct proc_dir_entry *proc_user_entry;
- int proc_registered;
- } netiucv_priv;
- /**
- * Link level header for a packet.
- */
- typedef struct ll_header_t {
- __u16 next;
- } ll_header;
- #define NETIUCV_HDRLEN (sizeof(ll_header))
- #define NETIUCV_BUFSIZE_MAX 32768
- #define NETIUCV_BUFSIZE_DEFAULT NETIUCV_BUFSIZE_MAX
- #define NETIUCV_MTU_MAX (NETIUCV_BUFSIZE_MAX - NETIUCV_HDRLEN)
- #define NETIUCV_MTU_DEFAULT 9216
- #define NETIUCV_QUEUELEN_DEFAULT 50
- #define NETIUCV_TIMEOUT_5SEC 5000
- /**
- * Compatibility macros for busy handling
- * of network devices.
- */
- #if LINUX_VERSION_CODE < 0x02032D
- static __inline__ void netiucv_clear_busy(net_device *dev)
- {
- clear_bit(0 ,(void *)&dev->tbusy);
- mark_bh(NET_BH);
- }
- static __inline__ int netiucv_test_and_set_busy(net_device *dev)
- {
- return(test_and_set_bit(0, (void *)&dev->tbusy));
- }
- #define SET_DEVICE_START(device, value) dev->start = value
- #else
- static __inline__ void netiucv_clear_busy(net_device *dev)
- {
- clear_bit(0, &(((netiucv_priv *)dev->priv)->tbusy));
- netif_wake_queue(dev);
- }
- static __inline__ int netiucv_test_and_set_busy(net_device *dev)
- {
- netif_stop_queue(dev);
- return test_and_set_bit(0, &((netiucv_priv *)dev->priv)->tbusy);
- }
- #define SET_DEVICE_START(device, value)
- #endif
- #if LINUX_VERSION_CODE < 0x020400
- # define dev_kfree_skb_irq(a) dev_kfree_skb(a)
- #endif
- __u8 iucv_host[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
- __u8 iucvMagic[16] = {
- 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,
- 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40
- };
- /**
- * This mask means the 16-byte IUCV "magic" and the origin userid must
- * match exactly as specified in order to give connection_pending()
- * control.
- */
- __u8 mask[] = {
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
- };
- /**
- * Convert an iucv userId to its printable
- * form (strip whitespace at end).
- *
- * @param An iucv userId
- *
- * @returns The printable string (static data!!)
- */
- static __inline__ char *
- netiucv_printname(char *name)
- {
- static char tmp[9];
- char *p = tmp;
- memcpy(tmp, name, 8);
- tmp[8] = ' ';
- while (*p && (!isspace(*p)))
- p++;
- *p = ' ';
- return tmp;
- }
- /**
- * States of the interface statemachine.
- */
- enum dev_states {
- DEV_STATE_STOPPED,
- DEV_STATE_STARTWAIT,
- DEV_STATE_STOPWAIT,
- DEV_STATE_RUNNING,
- /**
- * MUST be always the last element!!
- */
- NR_DEV_STATES
- };
- static const char *dev_state_names[] = {
- "Stopped",
- "StartWait",
- "StopWait",
- "Running",
- };
- /**
- * Events of the interface statemachine.
- */
- enum dev_events {
- DEV_EVENT_START,
- DEV_EVENT_STOP,
- DEV_EVENT_CONUP,
- DEV_EVENT_CONDOWN,
- /**
- * MUST be always the last element!!
- */
- NR_DEV_EVENTS
- };
- static const char *dev_event_names[] = {
- "Start",
- "Stop",
- "Connection up",
- "Connection down",
- };
- /**
- * Events of the connection statemachine
- */
- enum conn_events {
- /**
- * Events, representing callbacks from
- * lowlevel iucv layer)
- */
- CONN_EVENT_CONN_REQ,
- CONN_EVENT_CONN_ACK,
- CONN_EVENT_CONN_REJ,
- CONN_EVENT_CONN_SUS,
- CONN_EVENT_CONN_RES,
- CONN_EVENT_RX,
- CONN_EVENT_TXDONE,
- /**
- * Events, representing errors return codes from
- * calls to lowlevel iucv layer
- */
- /**
- * Event, representing timer expiry.
- */
- CONN_EVENT_TIMER,
- /**
- * Events, representing commands from upper levels.
- */
- CONN_EVENT_START,
- CONN_EVENT_STOP,
- /**
- * MUST be always the last element!!
- */
- NR_CONN_EVENTS,
- };
- static const char *conn_event_names[] = {
- "Remote connection request",
- "Remote connection acknowledge",
- "Remote connection reject",
- "Connection suspended",
- "Connection resumed",
- "Data received",
- "Data sent",
- "Timer",
- "Start",
- "Stop",
- };
- /**
- * States of the connection statemachine.
- */
- enum conn_states {
- /**
- * Connection not assigned to any device,
- * initial state, invalid
- */
- CONN_STATE_INVALID,
- /**
- * Userid assigned but not operating
- */
- CONN_STATE_STOPPED,
- /**
- * Connection registered,
- * no connection request sent yet,
- * no connection request received
- */
- CONN_STATE_STARTWAIT,
- /**
- * Connection registered and connection request sent,
- * no acknowledge and no connection request received yet.
- */
- CONN_STATE_SETUPWAIT,
- /**
- * Connection up and running idle
- */
- CONN_STATE_IDLE,
- /**
- * Data sent, awaiting CONN_EVENT_TXDONE
- */
- CONN_STATE_TX,
- /**
- * Terminating
- */
- CONN_STATE_TERM,
- /**
- * Error during registration.
- */
- CONN_STATE_REGERR,
- /**
- * Error during registration.
- */
- CONN_STATE_CONNERR,
- /**
- * MUST be always the last element!!
- */
- NR_CONN_STATES,
- };
- static const char *conn_state_names[] = {
- "Invalid",
- "Stopped",
- "StartWait",
- "SetupWait",
- "Idle",
- "TX",
- "Terminating",
- "Registration error",
- "Connect error",
- };
- /**
- * Callback-wrappers, called from lowlevel iucv layer.
- *****************************************************************************/
- static void
- netiucv_callback_rx(iucv_MessagePending *eib, void *pgm_data)
- {
- iucv_connection *conn = (iucv_connection *)pgm_data;
- iucv_event ev;
- ev.conn = conn;
- ev.data = (void *)eib;
- fsm_event(conn->fsm, CONN_EVENT_RX, &ev);
- }
- static void
- netiucv_callback_txdone(iucv_MessageComplete *eib, void *pgm_data)
- {
- iucv_connection *conn = (iucv_connection *)pgm_data;
- iucv_event ev;
- ev.conn = conn;
- ev.data = (void *)eib;
- fsm_event(conn->fsm, CONN_EVENT_TXDONE, &ev);
- }
- static void
- netiucv_callback_connack(iucv_ConnectionComplete *eib, void *pgm_data)
- {
- iucv_connection *conn = (iucv_connection *)pgm_data;
- iucv_event ev;
- ev.conn = conn;
- ev.data = (void *)eib;
- fsm_event(conn->fsm, CONN_EVENT_CONN_ACK, &ev);
- }
- static void
- netiucv_callback_connreq(iucv_ConnectionPending *eib, void *pgm_data)
- {
- iucv_connection *conn = (iucv_connection *)pgm_data;
- iucv_event ev;
- ev.conn = conn;
- ev.data = (void *)eib;
- fsm_event(conn->fsm, CONN_EVENT_CONN_REQ, &ev);
- }
- static void
- netiucv_callback_connrej(iucv_ConnectionSevered *eib, void *pgm_data)
- {
- iucv_connection *conn = (iucv_connection *)pgm_data;
- iucv_event ev;
- ev.conn = conn;
- ev.data = (void *)eib;
- fsm_event(conn->fsm, CONN_EVENT_CONN_REJ, &ev);
- }
- static void
- netiucv_callback_connsusp(iucv_ConnectionQuiesced *eib, void *pgm_data)
- {
- iucv_connection *conn = (iucv_connection *)pgm_data;
- iucv_event ev;
- ev.conn = conn;
- ev.data = (void *)eib;
- fsm_event(conn->fsm, CONN_EVENT_CONN_SUS, &ev);
- }
- static void
- netiucv_callback_connres(iucv_ConnectionResumed *eib, void *pgm_data)
- {
- iucv_connection *conn = (iucv_connection *)pgm_data;
- iucv_event ev;
- 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(iucv_connection *conn, struct sk_buff *pskb)
- {
- net_device *dev = conn->netdev;
- netiucv_priv *privptr = (netiucv_priv *)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 == 0)
- break;
- skb_pull(pskb, NETIUCV_HDRLEN);
- header->next -= offset;
- offset += header->next;
- header->next -= NETIUCV_HDRLEN;
- if (skb_tailroom(pskb) < header->next) {
- printk(KERN_WARNING
- "%s: Illegal next field in iucv header: %d > %dn",
- dev->name, header->next, skb_tailroom(pskb));
- return;
- }
- skb_put(pskb, header->next);
- pskb->mac.raw = pskb->data;
- skb = dev_alloc_skb(pskb->len);
- if (!skb) {
- printk(KERN_WARNING
- "%s Out of memory in netiucv_unpack_skbn",
- dev->name);
- 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;
- netif_rx(skb);
- 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)
- {
- iucv_event *ev = (iucv_event *)arg;
- iucv_connection *conn = ev->conn;
- iucv_MessagePending *eib = (iucv_MessagePending *)ev->data;
- netiucv_priv *privptr = (netiucv_priv *)conn->netdev->priv;
- __u16 msglen = eib->ln1msg2.ipbfln1f;
- int rc;
- #ifdef DEBUG
- printk(KERN_DEBUG "%s() calledn", __FUNCTION__);
- #endif
- if (!conn->netdev) {
- /* FRITZ: How to tell iucv LL to drop the msg? */
- printk(KERN_WARNING
- "Received data for unlinked connectionn");
- return;
- }
- if (msglen > conn->max_buffsize) {
- /* FRITZ: How to tell iucv LL to drop the msg? */
- privptr->stats.rx_dropped++;
- 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 != 0 || msglen < 5) {
- privptr->stats.rx_errors++;
- return;
- }
- netiucv_unpack_skb(conn, conn->rx_buff);
- }
- static void
- conn_action_txdone(fsm_instance *fi, int event, void *arg)
- {
- iucv_event *ev = (iucv_event *)arg;
- iucv_connection *conn = ev->conn;
- iucv_MessageComplete *eib = (iucv_MessageComplete *)ev->data;
- netiucv_priv *privptr = NULL;
- /* Shut up, gcc! skb is always below 2G. */
- struct sk_buff *skb = (struct sk_buff *)(unsigned long)eib->ipmsgtag;
- __u32 txbytes = 0;
- __u32 txpackets = 0;
- __u32 stat_maxcq = 0;
- unsigned long saveflags;
- ll_header header;
- #ifdef DEBUG
- printk(KERN_DEBUG "%s() calledn", __FUNCTION__);
- #endif
- fsm_deltimer(&conn->timer);
- if (conn && conn->netdev && conn->netdev->priv)
- privptr = (netiucv_priv *)conn->netdev->priv;
- if (skb) {
- if (privptr) {
- privptr->stats.tx_packets++;
- privptr->stats.tx_bytes +=
- (skb->len - NETIUCV_HDRLEN - NETIUCV_HDRLEN);
- }
- dev_kfree_skb_any(skb);
- }
- 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);
- fsm_addtimer(&conn->timer, NETIUCV_TIMEOUT_5SEC,
- CONN_EVENT_TIMER, conn);
- 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;
- if (rc != 0) {
- fsm_deltimer(&conn->timer);
- fsm_newstate(fi, CONN_STATE_IDLE);
- if (privptr)
- privptr->stats.tx_errors += txpackets;
- } 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)
- {
- iucv_event *ev = (iucv_event *)arg;
- iucv_connection *conn = ev->conn;
- iucv_ConnectionPending *eib = (iucv_ConnectionPending *)ev->data;
- net_device *netdev = conn->netdev;
- netiucv_priv *privptr = (netiucv_priv *)netdev->priv;
- int rc;
- __u16 msglimit;
- __u8 udata[16];
- #ifdef DEBUG
- printk(KERN_DEBUG "%s() calledn", __FUNCTION__);
- #endif
- rc = iucv_accept(eib->ippathid, NETIUCV_QUEUELEN_DEFAULT, udata, 0,
- conn->handle, conn, NULL, &msglimit);
- if (rc != 0) {
- printk(KERN_WARNING
- "%s: IUCV accept failed with error %dn",
- netdev->name, 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)
- {
- iucv_event *ev = (iucv_event *)arg;
- // iucv_connection *conn = ev->conn;
- iucv_ConnectionPending *eib = (iucv_ConnectionPending *)ev->data;
- __u8 udata[16];
- #ifdef DEBUG
- printk(KERN_DEBUG "%s() calledn", __FUNCTION__);
- #endif
- iucv_sever(eib->ippathid, udata);
- }
- static void
- conn_action_connack(fsm_instance *fi, int event, void *arg)
- {
- iucv_event *ev = (iucv_event *)arg;
- iucv_connection *conn = ev->conn;
- iucv_ConnectionComplete *eib = (iucv_ConnectionComplete *)ev->data;
- net_device *netdev = conn->netdev;
- netiucv_priv *privptr = (netiucv_priv *)netdev->priv;
- #ifdef DEBUG
- printk(KERN_DEBUG "%s() calledn", __FUNCTION__);
- #endif
- fsm_newstate(fi, CONN_STATE_IDLE);
- conn->pathid = eib->ippathid;
- netdev->tx_queue_len = eib->ipmsglim;
- fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev);
- }
- static void
- conn_action_connsever(fsm_instance *fi, int event, void *arg)
- {
- iucv_event *ev = (iucv_event *)arg;
- iucv_connection *conn = ev->conn;
- // iucv_ConnectionSevered *eib = (iucv_ConnectionSevered *)ev->data;
- net_device *netdev = conn->netdev;
- netiucv_priv *privptr = (netiucv_priv *)netdev->priv;
- int state = fsm_getstate(fi);
- #ifdef DEBUG
- printk(KERN_DEBUG "%s() calledn", __FUNCTION__);
- #endif
- switch (state) {
- case CONN_STATE_IDLE:
- case CONN_STATE_TX:
- printk(KERN_INFO "%s: Remote dropped connectionn",
- netdev->name);
- if (conn->handle)
- iucv_unregister_program(conn->handle);
- conn->handle = 0;
- fsm_newstate(fi, CONN_STATE_STOPPED);
- fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev);
- break;
- }
- }
- static void
- conn_action_start(fsm_instance *fi, int event, void *arg)
- {
- iucv_event *ev = (iucv_event *)arg;
- iucv_connection *conn = ev->conn;
- int rc;
- #ifdef DEBUG
- printk(KERN_DEBUG "%s() calledn", __FUNCTION__);
- #endif
- if (conn->handle == 0) {
- conn->handle =
- iucv_register_program(iucvMagic, conn->userid, mask,
- &netiucv_ops, conn);
- fsm_newstate(fi, CONN_STATE_STARTWAIT);
- if (conn->handle <= 0) {
- fsm_newstate(fi, CONN_STATE_REGERR);
- conn->handle = 0;
- return;
- }
- #ifdef DEBUG
- printk(KERN_DEBUG "%s('%s'): registered successfullyn",
- conn->netdev->name, conn->userid);
- #endif
- }
- #ifdef DEBUG
- printk(KERN_DEBUG "%s('%s'): connecting ...n",
- conn->netdev->name, conn->userid);
- #endif
- rc = iucv_connect(&(conn->pathid), NETIUCV_QUEUELEN_DEFAULT, iucvMagic,
- conn->userid, iucv_host, 0, NULL, NULL, conn->handle,
- conn);
- fsm_newstate(fi, CONN_STATE_SETUPWAIT);
- switch (rc) {
- case 0:
- return;
- case 11:
- printk(KERN_NOTICE
- "%s: User %s is currently not available.n",
- conn->netdev->name,
- netiucv_printname(conn->userid));
- fsm_newstate(fi, CONN_STATE_STARTWAIT);
- return;
- case 12:
- printk(KERN_NOTICE
- "%s: User %s is currently not ready.n",
- conn->netdev->name,
- netiucv_printname(conn->userid));
- fsm_newstate(fi, CONN_STATE_STARTWAIT);
- return;
- case 13:
- printk(KERN_WARNING
- "%s: Too many IUCV connections.n",
- conn->netdev->name);
- fsm_newstate(fi, CONN_STATE_CONNERR);
- break;
- case 14:
- printk(KERN_WARNING
- "%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:
- printk(KERN_WARNING
- "%s: No IUCV authorization in CP directory.n",
- conn->netdev->name);
- fsm_newstate(fi, CONN_STATE_CONNERR);
- break;
- default:
- printk(KERN_WARNING
- "%s: iucv_connect returned error %dn",
- conn->netdev->name, rc);
- fsm_newstate(fi, CONN_STATE_CONNERR);
- break;
- }
- iucv_unregister_program(conn->handle);
- conn->handle = 0;
- }
- 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)
- {
- iucv_event *ev = (iucv_event *)arg;
- iucv_connection *conn = ev->conn;
- net_device *netdev = conn->netdev;
- netiucv_priv *privptr = (netiucv_priv *)netdev->priv;
- #ifdef DEBUG
- printk(KERN_DEBUG "%s() calledn", __FUNCTION__);
- #endif
- fsm_newstate(fi, CONN_STATE_STOPPED);
- netiucv_purge_skb_queue(&conn->collect_queue);
- if (conn->handle)
- iucv_unregister_program(conn->handle);
- conn->handle = 0;
- fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev);
- }
- static void
- conn_action_inval(fsm_instance *fi, int event, void *arg)
- {
- iucv_event *ev = (iucv_event *)arg;
- iucv_connection *conn = ev->conn;
- net_device *netdev = conn->netdev;
- printk(KERN_WARNING
- "%s: Cannot connect without usernamen",
- netdev->name);
- }
- 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_STARTWAIT, CONN_EVENT_START, conn_action_start },
- { 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_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 },
- };
- 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 net_device * upon call.
- */
- static void
- dev_action_start(fsm_instance *fi, int event, void *arg)
- {
- net_device *dev = (net_device *)arg;
- netiucv_priv *privptr = dev->priv;
- iucv_event ev;
- #ifdef DEBUG
- printk(KERN_DEBUG "%s() calledn", __FUNCTION__);
- #endif
- 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 net_device * upon call.
- */
- static void
- dev_action_stop(fsm_instance *fi, int event, void *arg)
- {
- net_device *dev = (net_device *)arg;
- netiucv_priv *privptr = dev->priv;
- iucv_event ev;
- #ifdef DEBUG
- printk(KERN_DEBUG "%s() calledn", __FUNCTION__);
- #endif
- 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 net_device * upon call.
- */
- static void
- dev_action_connup(fsm_instance *fi, int event, void *arg)
- {
- net_device *dev = (net_device *)arg;
- #ifdef DEBUG
- printk(KERN_DEBUG "%s() calledn", __FUNCTION__);
- #endif
- switch (fsm_getstate(fi)) {
- case DEV_STATE_STARTWAIT:
- fsm_newstate(fi, DEV_STATE_RUNNING);
- printk(KERN_INFO
- "%s: connected with remote siden",
- dev->name);
- break;
- case DEV_STATE_STOPWAIT:
- printk(KERN_INFO
- "%s: got connection UP event during shutdown!!n",
- dev->name);
- 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 net_device * upon call.
- */
- static void
- dev_action_conndown(fsm_instance *fi, int event, void *arg)
- {
- net_device *dev = (net_device *)arg;
- netiucv_priv *privptr = dev->priv;
- iucv_event ev;
- #ifdef DEBUG
- printk(KERN_DEBUG "%s() calledn", __FUNCTION__);
- #endif
- switch (fsm_getstate(fi)) {
- case DEV_STATE_RUNNING:
- fsm_newstate(fi, DEV_STATE_STARTWAIT);
- ev.conn = privptr->conn;
- fsm_event(privptr->conn->fsm, CONN_EVENT_START, &ev);
- break;
- case DEV_STATE_STARTWAIT:
- break;
- case DEV_STATE_STOPWAIT:
- fsm_newstate(fi, DEV_STATE_STOPPED);
- 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_STARTWAIT, DEV_EVENT_CONDOWN, dev_action_conndown },
- { 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(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;
- 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) {
- printk(KERN_WARNING
- "%s: Could not allocate tx_skbn",
- conn->netdev->name);
- rc = -ENOMEM;
- } 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);
- conn->retry = 0;
- fsm_newstate(conn->fsm, CONN_STATE_TX);
- fsm_addtimer(&conn->timer, NETIUCV_TIMEOUT_5SEC,
- CONN_EVENT_TIMER, conn);
- conn->prof.send_stamp = xtime;
-
- rc = iucv_send(conn->pathid, NULL, 0, 0,
- /* Shut up, gcc! nskb is always below 2G. */
- (__u32)(((unsigned long)nskb)&0xffffffff), 0,
- nskb->data, nskb->len);
- conn->prof.doios_single++;
- conn->prof.txlen += skb->len;
- if (rc != 0) {
- fsm_deltimer(&conn->timer);
- 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);
- }
- } else {
- if (copied)
- dev_kfree_skb(skb);
- }
- }
- 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(net_device *dev) {
- MOD_INC_USE_COUNT;
- SET_DEVICE_START(dev, 1);
- fsm_event(((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(net_device *dev) {
- SET_DEVICE_START(dev, 0);
- fsm_event(((netiucv_priv *)dev->priv)->fsm, DEV_EVENT_STOP, dev);
- MOD_DEC_USE_COUNT;
- 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, net_device *dev)
- {
- int rc = 0;
- netiucv_priv *privptr = (netiucv_priv *)dev->priv;
- /**
- * Some sanity checks ...
- */
- if (skb == NULL) {
- printk(KERN_WARNING "%s: NULL sk_buff passedn", dev->name);
- privptr->stats.tx_dropped++;
- return 0;
- }
- if (skb_headroom(skb) < (NETIUCV_HDRLEN)) {
- printk(KERN_WARNING
- "%s: Got sk_buff with head room < %ld bytesn",
- dev->name, NETIUCV_HDRLEN);
- dev_kfree_skb(skb);
- privptr->stats.tx_dropped++;
- return 0;
- }
- /**
- * If connection is not running, try to restart it
- * notify anybody about a link failure and throw
- * away packet.
- */
- if (fsm_getstate(privptr->fsm) != DEV_STATE_RUNNING) {
- fsm_event(privptr->fsm, DEV_EVENT_START, dev);
- dst_link_failure(skb);
- 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))
- return -EBUSY;
- dev->trans_start = jiffies;
- if (netiucv_transmit_skb(privptr->conn, skb) != 0)
- 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 (net_device * dev)
- {
- return &((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 (net_device * dev, int new_mtu)
- {
- if ((new_mtu < 576) || (new_mtu > NETIUCV_MTU_MAX))
- return -EINVAL;
- dev->mtu = new_mtu;
- return 0;
- }
- /**
- * procfs related structures and routines
- *****************************************************************************/
- static net_device *
- find_netdev_by_ino(unsigned long ino)
- {
- iucv_connection *conn = connections;
- net_device *dev = NULL;
- netiucv_priv *privptr;
- while (conn) {
- if (conn->netdev != dev) {
- dev = conn->netdev;
- privptr = (netiucv_priv *)dev->priv;
- if ((privptr->proc_buffer_entry->low_ino == ino) ||
- (privptr->proc_user_entry->low_ino == ino) ||
- (privptr->proc_stat_entry->low_ino == ino) )
- return dev;
- }
- conn = conn->next;
- }
- return NULL;
- }
- #if LINUX_VERSION_CODE < 0x020363
- /**
- * Lock the module, if someone changes into
- * our proc directory.
- */
- static void
- netiucv_fill_inode(struct inode *inode, int fill)
- {
- if (fill) {
- MOD_INC_USE_COUNT;
- } else
- MOD_DEC_USE_COUNT;
- }
- #endif
- #define CTRL_BUFSIZE 40
- static int
- netiucv_buffer_open(struct inode *inode, struct file *file)
- {
- file->private_data = kmalloc(CTRL_BUFSIZE, GFP_KERNEL);
- if (file->private_data == NULL)
- return -ENOMEM;
- MOD_INC_USE_COUNT;
- return 0;
- }
- static int
- netiucv_buffer_close(struct inode *inode, struct file *file)
- {
- kfree(file->private_data);
- MOD_DEC_USE_COUNT;
- return 0;
- }
- static ssize_t
- netiucv_buffer_write(struct file *file, const char *buf, size_t count,
- loff_t *off)
- {
- unsigned int ino = ((struct inode *)file->f_dentry->d_inode)->i_ino;
- net_device *dev;
- netiucv_priv *privptr;
- char *e;
- int bs1;
- char tmp[CTRL_BUFSIZE];
- if (!(dev = find_netdev_by_ino(ino)))
- return -ENODEV;
- if (off != &file->f_pos)
- return -ESPIPE;
- privptr = (netiucv_priv *)dev->priv;
- if (count >= 39)
- return -EINVAL;
- if (copy_from_user(tmp, buf, count))
- return -EFAULT;
- tmp[count+1] = ' ';
- bs1 = simple_strtoul(tmp, &e, 0);
- if ((bs1 > NETIUCV_BUFSIZE_MAX) ||
- (e && (!isspace(*e))))
- return -EINVAL;
- if ((dev->flags & IFF_RUNNING) &&
- (bs1 < (dev->mtu + NETIUCV_HDRLEN + 2)))
- return -EINVAL;
- if (bs1 < (576 + NETIUCV_HDRLEN + NETIUCV_HDRLEN))
- return -EINVAL;
- privptr->conn->max_buffsize = bs1;
- if (!(dev->flags & IFF_RUNNING))
- dev->mtu = bs1 - NETIUCV_HDRLEN - NETIUCV_HDRLEN;
- privptr->conn->flags |= CONN_FLAGS_BUFSIZE_CHANGED;
- return count;
- }
- static ssize_t
- netiucv_buffer_read(struct file *file, char *buf, size_t count, loff_t *off)
- {
- unsigned int ino = ((struct inode *)file->f_dentry->d_inode)->i_ino;
- char *sbuf = (char *)file->private_data;
- net_device *dev;
- netiucv_priv *privptr;
- ssize_t ret = 0;
- char *p = sbuf;
- int l;
- if (!(dev = find_netdev_by_ino(ino)))
- return -ENODEV;
- if (off != &file->f_pos)
- return -ESPIPE;
- privptr = (netiucv_priv *)dev->priv;
- if (file->f_pos == 0)
- sprintf(sbuf, "%dn", privptr->conn->max_buffsize);
- l = strlen(sbuf);
- p = sbuf;
- if (file->f_pos < l) {
- p += file->f_pos;
- l = strlen(p);
- ret = (count > l) ? l : count;
- if (copy_to_user(buf, p, ret))
- return -EFAULT;
- }
- file->f_pos += ret;
- return ret;
- }
- static int
- netiucv_user_open(struct inode *inode, struct file *file)
- {
- file->private_data = kmalloc(CTRL_BUFSIZE, GFP_KERNEL);
- if (file->private_data == NULL)
- return -ENOMEM;
- MOD_INC_USE_COUNT;
- return 0;
- }
- static int
- netiucv_user_close(struct inode *inode, struct file *file)
- {
- kfree(file->private_data);
- MOD_DEC_USE_COUNT;
- return 0;
- }
- static ssize_t
- netiucv_user_write(struct file *file, const char *buf, size_t count,
- loff_t *off)
- {
- unsigned int ino = ((struct inode *)file->f_dentry->d_inode)->i_ino;
- net_device *dev;
- netiucv_priv *privptr;
- int i;
- char *p;
- char tmp[CTRL_BUFSIZE];
- char user[9];
- if (!(dev = find_netdev_by_ino(ino)))
- return -ENODEV;
- if (off != &file->f_pos)
- return -ESPIPE;
- privptr = (netiucv_priv *)dev->priv;
- if (count >= 39)
- return -EINVAL;
- if (copy_from_user(tmp, buf, count))
- return -EFAULT;
- tmp[count+1] = ' ';
- memset(user, ' ', sizeof(user));
- user[8] = ' ';
- for (p = tmp, i = 0; *p && (!isspace(*p)); p++) {
- if (i > 7)
- return -EINVAL;
- user[i++] = *p;
- }
- if (memcmp(user, privptr->conn->userid, 8) != 0) {
- /* username changed */
- if (dev->flags & IFF_RUNNING)
- return -EBUSY;
- }
- memcpy(privptr->conn->userid, user, 9);
- return count;
- }
- static ssize_t
- netiucv_user_read(struct file *file, char *buf, size_t count, loff_t *off)
- {
- unsigned int ino = ((struct inode *)file->f_dentry->d_inode)->i_ino;
- char *sbuf = (char *)file->private_data;
- net_device *dev;
- netiucv_priv *privptr;
- ssize_t ret = 0;
- char *p = sbuf;
- int l;
- if (!(dev = find_netdev_by_ino(ino)))
- return -ENODEV;
- if (off != &file->f_pos)
- return -ESPIPE;
- privptr = (netiucv_priv *)dev->priv;
- if (file->f_pos == 0)
- sprintf(sbuf, "%sn",
- netiucv_printname(privptr->conn->userid));
- l = strlen(sbuf);
- p = sbuf;
- if (file->f_pos < l) {
- p += file->f_pos;
- l = strlen(p);
- ret = (count > l) ? l : count;
- if (copy_to_user(buf, p, ret))
- return -EFAULT;
- }
- file->f_pos += ret;
- return ret;
- }
- #define STATS_BUFSIZE 2048
- static int
- netiucv_stat_open(struct inode *inode, struct file *file)
- {
- file->private_data = kmalloc(STATS_BUFSIZE, GFP_KERNEL);
- if (file->private_data == NULL)
- return -ENOMEM;
- MOD_INC_USE_COUNT;
- return 0;
- }
- static int
- netiucv_stat_close(struct inode *inode, struct file *file)
- {
- kfree(file->private_data);
- MOD_DEC_USE_COUNT;
- return 0;
- }
- static ssize_t
- netiucv_stat_write(struct file *file, const char *buf, size_t count, loff_t *off)
- {
- unsigned int ino = ((struct inode *)file->f_dentry->d_inode)->i_ino;
- net_device *dev;
- netiucv_priv *privptr;
- if (!(dev = find_netdev_by_ino(ino)))
- return -ENODEV;
- privptr = (netiucv_priv *)dev->priv;
- privptr->conn->prof.maxmulti = 0;
- privptr->conn->prof.maxcqueue = 0;
- privptr->conn->prof.doios_single = 0;
- privptr->conn->prof.doios_multi = 0;
- privptr->conn->prof.txlen = 0;
- privptr->conn->prof.tx_time = 0;
- return count;
- }
- static ssize_t
- netiucv_stat_read(struct file *file, char *buf, size_t count, loff_t *off)
- {
- unsigned int ino = ((struct inode *)file->f_dentry->d_inode)->i_ino;
- char *sbuf = (char *)file->private_data;
- net_device *dev;
- netiucv_priv *privptr;
- ssize_t ret = 0;
- char *p = sbuf;
- int l;
- if (!(dev = find_netdev_by_ino(ino)))
- return -ENODEV;
- if (off != &file->f_pos)
- return -ESPIPE;
- privptr = (netiucv_priv *)dev->priv;
- if (file->f_pos == 0) {
- p += sprintf(p, "Device FSM state: %sn",
- fsm_getstate_str(privptr->fsm));
- p += sprintf(p, "Connection FSM state: %sn",
- fsm_getstate_str(privptr->conn->fsm));
- p += sprintf(p, "Max. TX buffer used: %ldn",
- privptr->conn->prof.maxmulti);
- p += sprintf(p, "Max. chained SKBs: %ldn",
- privptr->conn->prof.maxcqueue);
- p += sprintf(p, "TX single write ops: %ldn",
- privptr->conn->prof.doios_single);
- p += sprintf(p, "TX multi write ops: %ldn",
- privptr->conn->prof.doios_multi);
- p += sprintf(p, "Netto bytes written: %ldn",
- privptr->conn->prof.txlen);
- p += sprintf(p, "Max. TX IO-time: %ldn",
- privptr->conn->prof.tx_time);
- }
- l = strlen(sbuf);
- p = sbuf;
- if (file->f_pos < l) {
- p += file->f_pos;
- l = strlen(p);
- ret = (count > l) ? l : count;
- if (copy_to_user(buf, p, ret))
- return -EFAULT;
- }
- file->f_pos += ret;
- return ret;
- }
- static struct file_operations netiucv_stat_fops = {
- read: netiucv_stat_read,
- write: netiucv_stat_write,
- open: netiucv_stat_open,
- release: netiucv_stat_close,
- };
- static struct file_operations netiucv_buffer_fops = {
- read: netiucv_buffer_read,
- write: netiucv_buffer_write,
- open: netiucv_buffer_open,
- release: netiucv_buffer_close,
- };
- static struct file_operations netiucv_user_fops = {
- read: netiucv_user_read,
- write: netiucv_user_write,
- open: netiucv_user_open,
- release: netiucv_user_close,
- };
- static struct inode_operations netiucv_stat_iops = {
- #if LINUX_VERSION_CODE < 0x020363
- default_file_ops: &netiucv_stat_fops
- #endif
- };
- static struct inode_operations netiucv_buffer_iops = {
- #if LINUX_VERSION_CODE < 0x020363
- default_file_ops: &netiucv_buffer_fops
- #endif
- };
- static struct inode_operations netiucv_user_iops = {
- #if LINUX_VERSION_CODE < 0x020363
- default_file_ops: &netiucv_user_fops
- #endif
- };
- static struct proc_dir_entry stat_entry = {
- 0, /* low_ino */
- 10, /* namelen */
- "statistics", /* name */
- S_IFREG | S_IRUGO | S_IWUSR, /* mode */
- 1, /* nlink */
- 0, /* uid */
- 0, /* gid */
- 0, /* size */
- &netiucv_stat_iops /* ops */
- };
- static struct proc_dir_entry buffer_entry = {
- 0, /* low_ino */
- 10, /* namelen */
- "buffersize", /* name */
- S_IFREG | S_IRUSR | S_IWUSR, /* mode */
- 1, /* nlink */
- 0, /* uid */
- 0, /* gid */
- 0, /* size */
- &netiucv_buffer_iops /* ops */
- };
- static struct proc_dir_entry user_entry = {
- 0, /* low_ino */
- 8, /* namelen */
- "username", /* name */
- S_IFREG | S_IRUSR | S_IWUSR, /* mode */
- 1, /* nlink */
- 0, /* uid */
- 0, /* gid */
- 0, /* size */
- &netiucv_user_iops /* ops */
- };
- #if LINUX_VERSION_CODE < 0x020363
- static struct proc_dir_entry netiucv_dir = {
- 0, /* low_ino */
- 4, /* namelen */
- "iucv", /* name */
- S_IFDIR | S_IRUGO | S_IXUGO, /* mode */
- 2, /* nlink */
- 0, /* uid */
- 0, /* gid */
- 0, /* size */
- 0, /* ops */
- 0, /* get_info */
- netiucv_fill_inode /* fill_ino (for locking) */
- };
- static struct proc_dir_entry netiucv_template =
- {
- 0, /* low_ino */
- 0, /* namelen */
- "", /* name */
- S_IFDIR | S_IRUGO | S_IXUGO, /* mode */
- 2, /* nlink */
- 0, /* uid */
- 0, /* gid */
- 0, /* size */
- 0, /* ops */
- 0, /* get_info */
- netiucv_fill_inode /* fill_ino (for locking) */
- };
- #else
- static struct proc_dir_entry *netiucv_dir = NULL;
- static struct proc_dir_entry *netiucv_template = NULL;
- #endif
- /**
- * Create the driver's main directory /proc/net/iucv
- */
- static void
- netiucv_proc_create_main(void)
- {
- /**
- * If not registered, register main proc dir-entry now
- */
- #if LINUX_VERSION_CODE > 0x020362
- if (!netiucv_dir)
- netiucv_dir = proc_mkdir("iucv", proc_net);
- #else
- if (netiucv_dir.low_ino == 0)
- proc_net_register(&netiucv_dir);
- #endif
- }
- #ifdef MODULE
- /**
- * Destroy /proc/net/iucv
- */
- static void
- netiucv_proc_destroy_main(void)
- {
- #if LINUX_VERSION_CODE > 0x020362
- remove_proc_entry("iucv", proc_net);
- #else
- proc_net_unregister(netiucv_dir.low_ino);
- #endif
- }
- #endif MODULE
- /**
- * Create a device specific subdirectory in /proc/net/iucv/ with the
- * same name like the device. In that directory, create 3 entries
- * "statistics", "buffersize" and "username".
- *
- * @param dev The device for which the subdirectory should be created.
- *
- */
- static void
- netiucv_proc_create_sub(net_device *dev) {
- netiucv_priv *privptr = dev->priv;
- #if LINUX_VERSION_CODE > 0x020362
- privptr->proc_dentry = proc_mkdir(dev->name, netiucv_dir);
- privptr->proc_stat_entry =
- create_proc_entry("statistics",
- S_IFREG | S_IRUSR | S_IWUSR,
- privptr->proc_dentry);
- privptr->proc_stat_entry->proc_fops = &netiucv_stat_fops;
- privptr->proc_stat_entry->proc_iops = &netiucv_stat_iops;
- privptr->proc_buffer_entry =
- create_proc_entry("buffersize",
- S_IFREG | S_IRUSR | S_IWUSR,
- privptr->proc_dentry);
- privptr->proc_buffer_entry->proc_fops = &netiucv_buffer_fops;
- privptr->proc_buffer_entry->proc_iops = &netiucv_buffer_iops;
- privptr->proc_user_entry =
- create_proc_entry("username",
- S_IFREG | S_IRUSR | S_IWUSR,
- privptr->proc_dentry);
- privptr->proc_user_entry->proc_fops = &netiucv_user_fops;
- privptr->proc_user_entry->proc_iops = &netiucv_user_iops;
- #else
- privptr->proc_dentry->name = dev->name;
- privptr->proc_dentry->namelen = strlen(dev->name);
- proc_register(&netiucv_dir, privptr->proc_dentry);
- proc_register(privptr->proc_dentry, privptr->proc_stat_entry);
- proc_register(privptr->proc_dentry, privptr->proc_buffer_entry);
- proc_register(privptr->proc_dentry, privptr->proc_user_entry);
- #endif
- privptr->proc_registered = 1;
- }
- /**
- * Destroy a device specific subdirectory.
- *
- * @param privptr Pointer to device private data.
- */
- static void
- netiucv_proc_destroy_sub(netiucv_priv *privptr) {
- if (!privptr->proc_registered)
- return;
- #if LINUX_VERSION_CODE > 0x020362
- remove_proc_entry("statistics", privptr->proc_dentry);
- remove_proc_entry("buffersize", privptr->proc_dentry);
- remove_proc_entry("username", privptr->proc_dentry);
- remove_proc_entry(privptr->proc_dentry->name, netiucv_dir);
- #else
- proc_unregister(privptr->proc_dentry,
- privptr->proc_stat_entry->low_ino);
- proc_unregister(privptr->proc_dentry,
- privptr->proc_buffer_entry->low_ino);
- proc_unregister(privptr->proc_dentry,
- privptr->proc_user_entry->low_ino);
- proc_unregister(&netiucv_dir,
- privptr->proc_dentry->low_ino);
- #endif
- privptr->proc_registered = 0;
- }
- /**
- * Allocate and initialize a new connection structure.
- * Add it to the list of connections;
- */
- static iucv_connection *
- netiucv_new_connection(net_device *dev, char *username)
- {
- iucv_connection **clist = &connections;
- iucv_connection *conn =
- (iucv_connection *)kmalloc(sizeof(iucv_connection), GFP_KERNEL);
- if (conn) {
- memset(conn, 0, sizeof(iucv_connection));
- skb_queue_head_init(&conn->collect_queue);
- conn->max_buffsize = NETIUCV_BUFSIZE_DEFAULT;
- conn->netdev = dev;
- conn->rx_buff = alloc_skb(NETIUCV_BUFSIZE_DEFAULT, GFP_DMA);
- if (!conn->rx_buff) {
- kfree(conn);
- return NULL;
- }
- conn->tx_buff = alloc_skb(NETIUCV_BUFSIZE_DEFAULT, 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 connections.
- */
- static void
- netiucv_remove_connection(iucv_connection *conn)
- {
- iucv_connection **clist = &connections;
- if (conn == NULL)
- return;
- while (*clist) {
- if (*clist == conn) {
- *clist = conn->next;
- if (conn->handle != 0) {
- iucv_unregister_program(conn->handle);
- conn->handle = 0;
- }
- fsm_deltimer(&conn->timer);
- kfree_fsm(conn->fsm);
- kfree_skb(conn->rx_buff);
- kfree_skb(conn->tx_buff);
- return;
- }
- clist = &((*clist)->next);
- }
- }
- /**
- * Allocate and initialize everything of a net device.
- */
- static net_device *
- netiucv_init_netdevice(int ifno, char *username)
- {
- netiucv_priv *privptr;
- int priv_size;
- net_device *dev = kmalloc(sizeof(net_device)
- #if LINUX_VERSION_CODE < 0x020300
- + 11 /* name + zero */
- #endif
- , GFP_KERNEL);
- if (!dev)
- return NULL;
- memset(dev, 0, sizeof(net_device));
- #if LINUX_VERSION_CODE < 0x020300
- dev->name = (char *)dev + sizeof(net_device);
- #endif
- sprintf(dev->name, "iucv%d", ifno);
- priv_size = sizeof(netiucv_priv) + sizeof(netiucv_template) +
- sizeof(stat_entry) + sizeof(buffer_entry) + sizeof(user_entry);
- dev->priv = kmalloc(priv_size, GFP_KERNEL);
- if (dev->priv == NULL) {
- kfree(dev);
- return NULL;
- }
- memset(dev->priv, 0, priv_size);
- privptr = (netiucv_priv *)dev->priv;
- privptr->proc_dentry = (struct proc_dir_entry *)
- (((char *)privptr) + sizeof(netiucv_priv));
- privptr->proc_stat_entry = (struct proc_dir_entry *)
- (((char *)privptr) + sizeof(netiucv_priv) +
- sizeof(netiucv_template));
- privptr->proc_buffer_entry = (struct proc_dir_entry *)
- (((char *)privptr) + sizeof(netiucv_priv) +
- sizeof(netiucv_template) + sizeof(stat_entry));
- privptr->proc_user_entry = (struct proc_dir_entry *)
- (((char *)privptr) + sizeof(netiucv_priv) +
- sizeof(netiucv_template) + sizeof(stat_entry) +
- sizeof(buffer_entry));
- memcpy(privptr->proc_dentry, &netiucv_template,
- sizeof(netiucv_template));
- memcpy(privptr->proc_stat_entry, &stat_entry, sizeof(stat_entry));
- memcpy(privptr->proc_buffer_entry, &buffer_entry, sizeof(buffer_entry));
- memcpy(privptr->proc_user_entry, &user_entry, sizeof(user_entry));
- 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 == NULL) {
- kfree(privptr);
- kfree(dev);
- return NULL;
- }
- privptr->conn = netiucv_new_connection(dev, username);
- if (!privptr->conn) {
- kfree_fsm(privptr->fsm);
- kfree(privptr);
- kfree(dev);
- return NULL;
- }
- fsm_newstate(privptr->fsm, DEV_STATE_STOPPED);
- 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->hard_header_len = NETIUCV_HDRLEN;
- dev->addr_len = 0;
- dev->type = ARPHRD_SLIP;
- dev->tx_queue_len = NETIUCV_QUEUELEN_DEFAULT;
- dev_init_buffers(dev);
- dev->flags = IFF_POINTOPOINT | IFF_NOARP;
- return dev;
- }
- /**
- * Allocate and initialize everything of a net device.
- */
- static void
- netiucv_free_netdevice(net_device *dev)
- {
- netiucv_priv *privptr;
- if (!dev)
- return;
- privptr = (netiucv_priv *)dev->priv;
- if (privptr) {
- if (privptr->conn)
- netiucv_remove_connection(privptr->conn);
- if (privptr->fsm)
- kfree_fsm(privptr->fsm);
- netiucv_proc_destroy_sub(privptr);
- kfree(privptr);
- }
- kfree(dev);
- }
- static void
- netiucv_banner(void)
- {
- char vbuf[] = "$Revision: 1.16 $";
- char *version = vbuf;
- if ((version = strchr(version, ':'))) {
- char *p = strchr(version + 1, '$');
- if (p)
- *p = ' ';
- } else
- version = " ??? ";
- printk(KERN_INFO "NETIUCV driver Version%s initializedn", version);
- }
- #ifndef MODULE
- # if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0))
- # define init_return(a) return a
- static int __init
- iucv_setup(char *param)
- # else
- # define init_return(a) return
- __initfunc (void iucv_setup(char *param, int *ints))
- # endif
- {
- /**
- * We do not parse parameters here because at the time of
- * calling iucv_setup(), the kernel does not yet have
- * memory management running. We delay this until probing
- * is called.
- */
- iucv = param;
- init_return(1);
- }
- # if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0))
- __setup ("iucv=", iucv_setup);
- # endif
- #else
- static void
- netiucv_exit(void)
- {
- while (connections) {
- net_device *dev = connections->netdev;
- unregister_netdev(dev);
- netiucv_free_netdevice(dev);
- }
- netiucv_proc_destroy_main();
- printk(KERN_INFO "NETIUCV driver unloadedn");
- return;
- }
- #endif
- static int
- netiucv_init(void)
- {
- char *p = iucv;
- int ifno = 0;
- int i = 0;
- char username[10];
- netiucv_proc_create_main();
- while (p) {
- if (isalnum(*p)) {
- username[i++] = *p++;
- username[i] = ' ';
- if (i > 8) {
- printk(KERN_WARNING
- "netiucv: Invalid user name '%s'n",
- username);
- while (*p && (*p != ':') && (*p != ','))
- p++;
- }
- } else {
- if (*p && (*p != ':') && (*p != ',')) {
- printk(KERN_WARNING
- "netiucv: Invalid delimiter '%c'n",
- *p);
- while (*p && (*p != ':') && (*p != ','))
- p++;
- } else {
- if (i) {
- net_device *dev;
- while (i < 9)
- username[i++] = ' ';
- username[9] = ' ';
- dev = netiucv_init_netdevice(ifno,
- username);
- if (!dev)
- printk(KERN_WARNING
- "netiucv: Could not allocate network device structure for user '%s'n", netiucv_printname(username));
- else {
- if (register_netdev(dev)) {
- printk(KERN_WARNING
- "netiucv: Could not register '%s'n", dev->name);
- netiucv_free_netdevice(dev);
- } else {
- printk(KERN_INFO "%s: '%s'n", dev->name, netiucv_printname(username));
- netiucv_proc_create_sub(dev);
- ifno++;
- }
- }
- }
- if (!(*p))
- break;
- i = 0;
- p++;
- }
- }
- }
- netiucv_banner();
- return 0;
- }
- #ifdef MODULE
- module_init(netiucv_init);
- module_exit(netiucv_exit);
- #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,12))
- MODULE_LICENSE("GPL");
- #endif
- #endif