Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/s390/net/netiucv.c b/drivers/s390/net/netiucv.c
new file mode 100644
index 0000000..16e8e69
--- /dev/null
+++ b/drivers/s390/net/netiucv.c
@@ -0,0 +1,2149 @@
+/*
+ * $Id: netiucv.c,v 1.63 2004/07/27 13:36:05 mschwide Exp $
+ *
+ * IUCV network driver
+ *
+ * Copyright (C) 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Author(s): Fritz Elfert (elfert@de.ibm.com, felfert@millenux.com)
+ *
+ * Driverfs integration and all bugs therein by Cornelia Huck(cohuck@de.ibm.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: 1.63 $
+ *
+ */
+
+#undef DEBUG
+
+#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/bitops.h>
+
+#include <linux/signal.h>
+#include <linux/string.h>
+#include <linux/device.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/uaccess.h>
+
+#include "iucv.h"
+#include "fsm.h"
+
+MODULE_AUTHOR
+ ("(C) 2001 IBM Corporation by Fritz Elfert (felfert@millenux.com)");
+MODULE_DESCRIPTION ("Linux for S/390 IUCV network driver");
+
+
+#define PRINTK_HEADER " iucv: " /* for debugging */
+
+static struct device_driver netiucv_driver = {
+ .name = "netiucv",
+ .bus = &iucv_bus,
+};
+
+/**
+ * Per connection profiling data
+ */
+struct connection_profile {
+ unsigned long maxmulti;
+ unsigned long maxcqueue;
+ unsigned long doios_single;
+ unsigned long doios_multi;
+ unsigned long txlen;
+ unsigned long tx_time;
+ struct timespec send_stamp;
+ unsigned long tx_pending;
+ unsigned long tx_max_pending;
+};
+
+/**
+ * Representation of one iucv connection
+ */
+struct iucv_connection {
+ struct iucv_connection *next;
+ iucv_handle_t handle;
+ __u16 pathid;
+ struct sk_buff *rx_buff;
+ struct sk_buff *tx_buff;
+ struct sk_buff_head collect_queue;
+ struct sk_buff_head commit_queue;
+ spinlock_t collect_lock;
+ int collect_len;
+ int max_buffsize;
+ fsm_timer timer;
+ fsm_instance *fsm;
+ struct net_device *netdev;
+ struct connection_profile prof;
+ char userid[9];
+};
+
+/**
+ * Linked list of all connection structs.
+ */
+static struct iucv_connection *iucv_connections;
+
+/**
+ * Representation of event-data for the
+ * connection state machine.
+ */
+struct iucv_event {
+ struct iucv_connection *conn;
+ void *data;
+};
+
+/**
+ * Private part of the network device structure
+ */
+struct netiucv_priv {
+ struct net_device_stats stats;
+ unsigned long tbusy;
+ fsm_instance *fsm;
+ struct iucv_connection *conn;
+ struct device *dev;
+};
+
+/**
+ * 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.
+ */
+static __inline__ void netiucv_clear_busy(struct net_device *dev)
+{
+ clear_bit(0, &(((struct netiucv_priv *)dev->priv)->tbusy));
+ netif_wake_queue(dev);
+}
+
+static __inline__ int netiucv_test_and_set_busy(struct net_device *dev)
+{
+ netif_stop_queue(dev);
+ return test_and_set_bit(0, &((struct netiucv_priv *)dev->priv)->tbusy);
+}
+
+static __u8 iucv_host[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+static __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.
+ */
+static __u8 netiucv_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] = '\0';
+ while (*p && (!isspace(*p)))
+ p++;
+ *p = '\0';
+ 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,
+
+ /**
+ * 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",
+};
+
+
+/**
+ * Debug Facility Stuff
+ */
+static debug_info_t *iucv_dbf_setup = NULL;
+static debug_info_t *iucv_dbf_data = NULL;
+static debug_info_t *iucv_dbf_trace = NULL;
+
+DEFINE_PER_CPU(char[256], iucv_dbf_txt_buf);
+
+static void
+iucv_unregister_dbf_views(void)
+{
+ if (iucv_dbf_setup)
+ debug_unregister(iucv_dbf_setup);
+ if (iucv_dbf_data)
+ debug_unregister(iucv_dbf_data);
+ if (iucv_dbf_trace)
+ debug_unregister(iucv_dbf_trace);
+}
+static int
+iucv_register_dbf_views(void)
+{
+ iucv_dbf_setup = debug_register(IUCV_DBF_SETUP_NAME,
+ IUCV_DBF_SETUP_INDEX,
+ IUCV_DBF_SETUP_NR_AREAS,
+ IUCV_DBF_SETUP_LEN);
+ iucv_dbf_data = debug_register(IUCV_DBF_DATA_NAME,
+ IUCV_DBF_DATA_INDEX,
+ IUCV_DBF_DATA_NR_AREAS,
+ IUCV_DBF_DATA_LEN);
+ iucv_dbf_trace = debug_register(IUCV_DBF_TRACE_NAME,
+ IUCV_DBF_TRACE_INDEX,
+ IUCV_DBF_TRACE_NR_AREAS,
+ IUCV_DBF_TRACE_LEN);
+
+ if ((iucv_dbf_setup == NULL) || (iucv_dbf_data == NULL) ||
+ (iucv_dbf_trace == NULL)) {
+ iucv_unregister_dbf_views();
+ return -ENOMEM;
+ }
+ debug_register_view(iucv_dbf_setup, &debug_hex_ascii_view);
+ debug_set_level(iucv_dbf_setup, IUCV_DBF_SETUP_LEVEL);
+
+ debug_register_view(iucv_dbf_data, &debug_hex_ascii_view);
+ debug_set_level(iucv_dbf_data, IUCV_DBF_DATA_LEVEL);
+
+ debug_register_view(iucv_dbf_trace, &debug_hex_ascii_view);
+ debug_set_level(iucv_dbf_trace, IUCV_DBF_TRACE_LEVEL);
+
+ return 0;
+}
+
+/**
+ * Callback-wrappers, called from lowlevel iucv layer.
+ *****************************************************************************/
+
+static void
+netiucv_callback_rx(iucv_MessagePending *eib, void *pgm_data)
+{
+ struct iucv_connection *conn = (struct iucv_connection *)pgm_data;
+ struct 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)
+{
+ struct iucv_connection *conn = (struct iucv_connection *)pgm_data;
+ struct 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)
+{
+ struct iucv_connection *conn = (struct iucv_connection *)pgm_data;
+ struct 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)
+{
+ struct iucv_connection *conn = (struct iucv_connection *)pgm_data;
+ struct 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)
+{
+ struct iucv_connection *conn = (struct iucv_connection *)pgm_data;
+ struct 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)
+{
+ struct iucv_connection *conn = (struct iucv_connection *)pgm_data;
+ struct 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)
+{
+ struct iucv_connection *conn = (struct iucv_connection *)pgm_data;
+ struct 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(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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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: 1.63 $";
+ char *version = vbuf;
+
+ if ((version = strchr(version, ':'))) {
+ char *p = strchr(version + 1, '$');
+ 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");