4 * Copyright 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation
5 * Author(s): Fritz Elfert (elfert@de.ibm.com, felfert@millenux.com)
7 * Sysfs integration and all bugs therein by Cornelia Huck
8 * (cornelia.huck@de.ibm.com)
11 * the source of the original IUCV driver by:
12 * Stefan Hegewald <hegewald@de.ibm.com>
13 * Hartmut Penner <hpenner@de.ibm.com>
14 * Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
15 * Martin Schwidefsky (schwidefsky@de.ibm.com)
16 * Alan Altmark (Alan_Altmark@us.ibm.com) Sept. 2000
18 * This program is free software; you can redistribute it and/or modify
19 * it under the terms of the GNU General Public License as published by
20 * the Free Software Foundation; either version 2, or (at your option)
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software
30 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
36 #include <linux/module.h>
37 #include <linux/init.h>
38 #include <linux/kernel.h>
39 #include <linux/slab.h>
40 #include <linux/errno.h>
41 #include <linux/types.h>
42 #include <linux/interrupt.h>
43 #include <linux/timer.h>
44 #include <linux/sched.h>
45 #include <linux/bitops.h>
47 #include <linux/signal.h>
48 #include <linux/string.h>
49 #include <linux/device.h>
52 #include <linux/if_arp.h>
53 #include <linux/tcp.h>
54 #include <linux/skbuff.h>
55 #include <linux/ctype.h>
59 #include <asm/uaccess.h>
61 #include <net/iucv/iucv.h>
65 ("(C) 2001 IBM Corporation by Fritz Elfert (felfert@millenux.com)");
66 MODULE_DESCRIPTION ("Linux for S/390 IUCV network driver");
69 * Debug Facility stuff
71 #define IUCV_DBF_SETUP_NAME "iucv_setup"
72 #define IUCV_DBF_SETUP_LEN 32
73 #define IUCV_DBF_SETUP_PAGES 2
74 #define IUCV_DBF_SETUP_NR_AREAS 1
75 #define IUCV_DBF_SETUP_LEVEL 3
77 #define IUCV_DBF_DATA_NAME "iucv_data"
78 #define IUCV_DBF_DATA_LEN 128
79 #define IUCV_DBF_DATA_PAGES 2
80 #define IUCV_DBF_DATA_NR_AREAS 1
81 #define IUCV_DBF_DATA_LEVEL 2
83 #define IUCV_DBF_TRACE_NAME "iucv_trace"
84 #define IUCV_DBF_TRACE_LEN 16
85 #define IUCV_DBF_TRACE_PAGES 4
86 #define IUCV_DBF_TRACE_NR_AREAS 1
87 #define IUCV_DBF_TRACE_LEVEL 3
89 #define IUCV_DBF_TEXT(name,level,text) \
91 debug_text_event(iucv_dbf_##name,level,text); \
94 #define IUCV_DBF_HEX(name,level,addr,len) \
96 debug_event(iucv_dbf_##name,level,(void*)(addr),len); \
99 DECLARE_PER_CPU(char[256], iucv_dbf_txt_buf);
101 #define IUCV_DBF_TEXT_(name,level,text...) \
103 char* iucv_dbf_txt_buf = get_cpu_var(iucv_dbf_txt_buf); \
104 sprintf(iucv_dbf_txt_buf, text); \
105 debug_text_event(iucv_dbf_##name,level,iucv_dbf_txt_buf); \
106 put_cpu_var(iucv_dbf_txt_buf); \
109 #define IUCV_DBF_SPRINTF(name,level,text...) \
111 debug_sprintf_event(iucv_dbf_trace, level, ##text ); \
112 debug_sprintf_event(iucv_dbf_trace, level, text ); \
116 * some more debug stuff
118 #define IUCV_HEXDUMP16(importance,header,ptr) \
119 PRINT_##importance(header "%02x %02x %02x %02x %02x %02x %02x %02x " \
120 "%02x %02x %02x %02x %02x %02x %02x %02x\n", \
121 *(((char*)ptr)),*(((char*)ptr)+1),*(((char*)ptr)+2), \
122 *(((char*)ptr)+3),*(((char*)ptr)+4),*(((char*)ptr)+5), \
123 *(((char*)ptr)+6),*(((char*)ptr)+7),*(((char*)ptr)+8), \
124 *(((char*)ptr)+9),*(((char*)ptr)+10),*(((char*)ptr)+11), \
125 *(((char*)ptr)+12),*(((char*)ptr)+13), \
126 *(((char*)ptr)+14),*(((char*)ptr)+15)); \
127 PRINT_##importance(header "%02x %02x %02x %02x %02x %02x %02x %02x " \
128 "%02x %02x %02x %02x %02x %02x %02x %02x\n", \
129 *(((char*)ptr)+16),*(((char*)ptr)+17), \
130 *(((char*)ptr)+18),*(((char*)ptr)+19), \
131 *(((char*)ptr)+20),*(((char*)ptr)+21), \
132 *(((char*)ptr)+22),*(((char*)ptr)+23), \
133 *(((char*)ptr)+24),*(((char*)ptr)+25), \
134 *(((char*)ptr)+26),*(((char*)ptr)+27), \
135 *(((char*)ptr)+28),*(((char*)ptr)+29), \
136 *(((char*)ptr)+30),*(((char*)ptr)+31));
138 static inline void iucv_hex_dump(unsigned char *buf, size_t len)
142 for (i = 0; i < len; i++) {
145 printk("%02x ", *(buf + i));
150 #define PRINTK_HEADER " iucv: " /* for debugging */
152 static struct device_driver netiucv_driver = {
157 static int netiucv_callback_connreq(struct iucv_path *,
158 u8 ipvmid[8], u8 ipuser[16]);
159 static void netiucv_callback_connack(struct iucv_path *, u8 ipuser[16]);
160 static void netiucv_callback_connrej(struct iucv_path *, u8 ipuser[16]);
161 static void netiucv_callback_connsusp(struct iucv_path *, u8 ipuser[16]);
162 static void netiucv_callback_connres(struct iucv_path *, u8 ipuser[16]);
163 static void netiucv_callback_rx(struct iucv_path *, struct iucv_message *);
164 static void netiucv_callback_txdone(struct iucv_path *, struct iucv_message *);
166 static struct iucv_handler netiucv_handler = {
167 .path_pending = netiucv_callback_connreq,
168 .path_complete = netiucv_callback_connack,
169 .path_severed = netiucv_callback_connrej,
170 .path_quiesced = netiucv_callback_connsusp,
171 .path_resumed = netiucv_callback_connres,
172 .message_pending = netiucv_callback_rx,
173 .message_complete = netiucv_callback_txdone
177 * Per connection profiling data
179 struct connection_profile {
180 unsigned long maxmulti;
181 unsigned long maxcqueue;
182 unsigned long doios_single;
183 unsigned long doios_multi;
185 unsigned long tx_time;
186 struct timespec send_stamp;
187 unsigned long tx_pending;
188 unsigned long tx_max_pending;
192 * Representation of one iucv connection
194 struct iucv_connection {
195 struct list_head list;
196 struct iucv_path *path;
197 struct sk_buff *rx_buff;
198 struct sk_buff *tx_buff;
199 struct sk_buff_head collect_queue;
200 struct sk_buff_head commit_queue;
201 spinlock_t collect_lock;
206 struct net_device *netdev;
207 struct connection_profile prof;
212 * Linked list of all connection structs.
214 static struct list_head iucv_connection_list =
215 LIST_HEAD_INIT(iucv_connection_list);
216 static rwlock_t iucv_connection_rwlock = RW_LOCK_UNLOCKED;
219 * Representation of event-data for the
220 * connection state machine.
223 struct iucv_connection *conn;
228 * Private part of the network device structure
230 struct netiucv_priv {
231 struct net_device_stats stats;
234 struct iucv_connection *conn;
239 * Link level header for a packet.
245 #define NETIUCV_HDRLEN (sizeof(struct ll_header))
246 #define NETIUCV_BUFSIZE_MAX 32768
247 #define NETIUCV_BUFSIZE_DEFAULT NETIUCV_BUFSIZE_MAX
248 #define NETIUCV_MTU_MAX (NETIUCV_BUFSIZE_MAX - NETIUCV_HDRLEN)
249 #define NETIUCV_MTU_DEFAULT 9216
250 #define NETIUCV_QUEUELEN_DEFAULT 50
251 #define NETIUCV_TIMEOUT_5SEC 5000
254 * Compatibility macros for busy handling
255 * of network devices.
257 static inline void netiucv_clear_busy(struct net_device *dev)
259 struct netiucv_priv *priv = netdev_priv(dev);
260 clear_bit(0, &priv->tbusy);
261 netif_wake_queue(dev);
264 static inline int netiucv_test_and_set_busy(struct net_device *dev)
266 struct netiucv_priv *priv = netdev_priv(dev);
267 netif_stop_queue(dev);
268 return test_and_set_bit(0, &priv->tbusy);
271 static u8 iucvMagic[16] = {
272 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,
273 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40
277 * Convert an iucv userId to its printable
278 * form (strip whitespace at end).
280 * @param An iucv userId
282 * @returns The printable string (static data!!)
284 static inline char *netiucv_printname(char *name)
288 memcpy(tmp, name, 8);
290 while (*p && (!isspace(*p)))
297 * States of the interface statemachine.
305 * MUST be always the last element!!
310 static const char *dev_state_names[] = {
318 * Events of the interface statemachine.
326 * MUST be always the last element!!
331 static const char *dev_event_names[] = {
339 * Events of the connection statemachine
343 * Events, representing callbacks from
344 * lowlevel iucv layer)
355 * Events, representing errors return codes from
356 * calls to lowlevel iucv layer
360 * Event, representing timer expiry.
365 * Events, representing commands from upper levels.
371 * MUST be always the last element!!
376 static const char *conn_event_names[] = {
377 "Remote connection request",
378 "Remote connection acknowledge",
379 "Remote connection reject",
380 "Connection suspended",
381 "Connection resumed",
392 * States of the connection statemachine.
396 * Connection not assigned to any device,
397 * initial state, invalid
402 * Userid assigned but not operating
407 * Connection registered,
408 * no connection request sent yet,
409 * no connection request received
411 CONN_STATE_STARTWAIT,
414 * Connection registered and connection request sent,
415 * no acknowledge and no connection request received yet.
417 CONN_STATE_SETUPWAIT,
420 * Connection up and running idle
425 * Data sent, awaiting CONN_EVENT_TXDONE
430 * Error during registration.
435 * Error during registration.
440 * MUST be always the last element!!
445 static const char *conn_state_names[] = {
453 "Registration error",
459 * Debug Facility Stuff
461 static debug_info_t *iucv_dbf_setup = NULL;
462 static debug_info_t *iucv_dbf_data = NULL;
463 static debug_info_t *iucv_dbf_trace = NULL;
465 DEFINE_PER_CPU(char[256], iucv_dbf_txt_buf);
467 static void iucv_unregister_dbf_views(void)
470 debug_unregister(iucv_dbf_setup);
472 debug_unregister(iucv_dbf_data);
474 debug_unregister(iucv_dbf_trace);
476 static int iucv_register_dbf_views(void)
478 iucv_dbf_setup = debug_register(IUCV_DBF_SETUP_NAME,
479 IUCV_DBF_SETUP_PAGES,
480 IUCV_DBF_SETUP_NR_AREAS,
482 iucv_dbf_data = debug_register(IUCV_DBF_DATA_NAME,
484 IUCV_DBF_DATA_NR_AREAS,
486 iucv_dbf_trace = debug_register(IUCV_DBF_TRACE_NAME,
487 IUCV_DBF_TRACE_PAGES,
488 IUCV_DBF_TRACE_NR_AREAS,
491 if ((iucv_dbf_setup == NULL) || (iucv_dbf_data == NULL) ||
492 (iucv_dbf_trace == NULL)) {
493 iucv_unregister_dbf_views();
496 debug_register_view(iucv_dbf_setup, &debug_hex_ascii_view);
497 debug_set_level(iucv_dbf_setup, IUCV_DBF_SETUP_LEVEL);
499 debug_register_view(iucv_dbf_data, &debug_hex_ascii_view);
500 debug_set_level(iucv_dbf_data, IUCV_DBF_DATA_LEVEL);
502 debug_register_view(iucv_dbf_trace, &debug_hex_ascii_view);
503 debug_set_level(iucv_dbf_trace, IUCV_DBF_TRACE_LEVEL);
509 * Callback-wrappers, called from lowlevel iucv layer.
512 static void netiucv_callback_rx(struct iucv_path *path,
513 struct iucv_message *msg)
515 struct iucv_connection *conn = path->private;
516 struct iucv_event ev;
520 fsm_event(conn->fsm, CONN_EVENT_RX, &ev);
523 static void netiucv_callback_txdone(struct iucv_path *path,
524 struct iucv_message *msg)
526 struct iucv_connection *conn = path->private;
527 struct iucv_event ev;
531 fsm_event(conn->fsm, CONN_EVENT_TXDONE, &ev);
534 static void netiucv_callback_connack(struct iucv_path *path, u8 ipuser[16])
536 struct iucv_connection *conn = path->private;
538 fsm_event(conn->fsm, CONN_EVENT_CONN_ACK, conn);
541 static int netiucv_callback_connreq(struct iucv_path *path,
542 u8 ipvmid[8], u8 ipuser[16])
544 struct iucv_connection *conn = path->private;
545 struct iucv_event ev;
548 if (memcmp(iucvMagic, ipuser, sizeof(ipuser)))
549 /* ipuser must match iucvMagic. */
552 read_lock_bh(&iucv_connection_rwlock);
553 list_for_each_entry(conn, &iucv_connection_list, list) {
554 if (strncmp(ipvmid, conn->userid, 8))
556 /* Found a matching connection for this path. */
560 fsm_event(conn->fsm, CONN_EVENT_CONN_REQ, &ev);
563 read_unlock_bh(&iucv_connection_rwlock);
567 static void netiucv_callback_connrej(struct iucv_path *path, u8 ipuser[16])
569 struct iucv_connection *conn = path->private;
571 fsm_event(conn->fsm, CONN_EVENT_CONN_REJ, conn);
574 static void netiucv_callback_connsusp(struct iucv_path *path, u8 ipuser[16])
576 struct iucv_connection *conn = path->private;
578 fsm_event(conn->fsm, CONN_EVENT_CONN_SUS, conn);
581 static void netiucv_callback_connres(struct iucv_path *path, u8 ipuser[16])
583 struct iucv_connection *conn = path->private;
585 fsm_event(conn->fsm, CONN_EVENT_CONN_RES, conn);
589 * Dummy NOP action for all statemachines
591 static void fsm_action_nop(fsm_instance *fi, int event, void *arg)
596 * Actions of the connection statemachine
601 * @conn: The connection where this skb has been received.
602 * @pskb: The received skb.
604 * Unpack a just received skb and hand it over to upper layers.
605 * Helper function for conn_action_rx.
607 static void netiucv_unpack_skb(struct iucv_connection *conn,
608 struct sk_buff *pskb)
610 struct net_device *dev = conn->netdev;
611 struct netiucv_priv *privptr = netdev_priv(dev);
614 skb_put(pskb, NETIUCV_HDRLEN);
616 pskb->ip_summed = CHECKSUM_NONE;
617 pskb->protocol = ntohs(ETH_P_IP);
621 struct ll_header *header = (struct ll_header *) pskb->data;
626 skb_pull(pskb, NETIUCV_HDRLEN);
627 header->next -= offset;
628 offset += header->next;
629 header->next -= NETIUCV_HDRLEN;
630 if (skb_tailroom(pskb) < header->next) {
631 PRINT_WARN("%s: Illegal next field in iucv header: "
633 dev->name, header->next, skb_tailroom(pskb));
634 IUCV_DBF_TEXT_(data, 2, "Illegal next field: %d > %d\n",
635 header->next, skb_tailroom(pskb));
638 skb_put(pskb, header->next);
639 pskb->mac.raw = pskb->data;
640 skb = dev_alloc_skb(pskb->len);
642 PRINT_WARN("%s Out of memory in netiucv_unpack_skb\n",
644 IUCV_DBF_TEXT(data, 2,
645 "Out of memory in netiucv_unpack_skb\n");
646 privptr->stats.rx_dropped++;
649 memcpy(skb_put(skb, pskb->len), pskb->data, pskb->len);
650 skb->mac.raw = skb->data;
651 skb->dev = pskb->dev;
652 skb->protocol = pskb->protocol;
653 pskb->ip_summed = CHECKSUM_UNNECESSARY;
655 * Since receiving is always initiated from a tasklet (in iucv.c),
656 * we must use netif_rx_ni() instead of netif_rx()
659 dev->last_rx = jiffies;
660 privptr->stats.rx_packets++;
661 privptr->stats.rx_bytes += skb->len;
662 skb_pull(pskb, header->next);
663 skb_put(pskb, NETIUCV_HDRLEN);
667 static void conn_action_rx(fsm_instance *fi, int event, void *arg)
669 struct iucv_event *ev = arg;
670 struct iucv_connection *conn = ev->conn;
671 struct iucv_message *msg = ev->data;
672 struct netiucv_priv *privptr = netdev_priv(conn->netdev);
675 IUCV_DBF_TEXT(trace, 4, __FUNCTION__);
678 iucv_message_reject(conn->path, msg);
679 PRINT_WARN("Received data for unlinked connection\n");
680 IUCV_DBF_TEXT(data, 2,
681 "Received data for unlinked connection\n");
684 if (msg->length > conn->max_buffsize) {
685 iucv_message_reject(conn->path, msg);
686 privptr->stats.rx_dropped++;
687 PRINT_WARN("msglen %d > max_buffsize %d\n",
688 msg->length, conn->max_buffsize);
689 IUCV_DBF_TEXT_(data, 2, "msglen %d > max_buffsize %d\n",
690 msg->length, conn->max_buffsize);
693 conn->rx_buff->data = conn->rx_buff->tail = conn->rx_buff->head;
694 conn->rx_buff->len = 0;
695 rc = iucv_message_receive(conn->path, msg, 0, conn->rx_buff->data,
697 if (rc || msg->length < 5) {
698 privptr->stats.rx_errors++;
699 PRINT_WARN("iucv_receive returned %08x\n", rc);
700 IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_receive\n", rc);
703 netiucv_unpack_skb(conn, conn->rx_buff);
706 static void conn_action_txdone(fsm_instance *fi, int event, void *arg)
708 struct iucv_event *ev = arg;
709 struct iucv_connection *conn = ev->conn;
710 struct iucv_message *msg = ev->data;
711 struct iucv_message txmsg;
712 struct netiucv_priv *privptr = NULL;
713 u32 single_flag = msg->tag;
718 unsigned long saveflags;
719 struct ll_header header;
722 IUCV_DBF_TEXT(trace, 4, __FUNCTION__);
724 if (conn && conn->netdev)
725 privptr = netdev_priv(conn->netdev);
726 conn->prof.tx_pending--;
728 if ((skb = skb_dequeue(&conn->commit_queue))) {
729 atomic_dec(&skb->users);
730 dev_kfree_skb_any(skb);
732 privptr->stats.tx_packets++;
733 privptr->stats.tx_bytes +=
734 (skb->len - NETIUCV_HDRLEN
739 conn->tx_buff->data = conn->tx_buff->tail = conn->tx_buff->head;
740 conn->tx_buff->len = 0;
741 spin_lock_irqsave(&conn->collect_lock, saveflags);
742 while ((skb = skb_dequeue(&conn->collect_queue))) {
743 header.next = conn->tx_buff->len + skb->len + NETIUCV_HDRLEN;
744 memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header,
746 memcpy(skb_put(conn->tx_buff, skb->len), skb->data, skb->len);
750 atomic_dec(&skb->users);
751 dev_kfree_skb_any(skb);
753 if (conn->collect_len > conn->prof.maxmulti)
754 conn->prof.maxmulti = conn->collect_len;
755 conn->collect_len = 0;
756 spin_unlock_irqrestore(&conn->collect_lock, saveflags);
757 if (conn->tx_buff->len == 0) {
758 fsm_newstate(fi, CONN_STATE_IDLE);
763 memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN);
764 conn->prof.send_stamp = xtime;
767 rc = iucv_message_send(conn->path, &txmsg, 0, 0,
768 conn->tx_buff->data, conn->tx_buff->len);
769 conn->prof.doios_multi++;
770 conn->prof.txlen += conn->tx_buff->len;
771 conn->prof.tx_pending++;
772 if (conn->prof.tx_pending > conn->prof.tx_max_pending)
773 conn->prof.tx_max_pending = conn->prof.tx_pending;
775 conn->prof.tx_pending--;
776 fsm_newstate(fi, CONN_STATE_IDLE);
778 privptr->stats.tx_errors += txpackets;
779 PRINT_WARN("iucv_send returned %08x\n", rc);
780 IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc);
783 privptr->stats.tx_packets += txpackets;
784 privptr->stats.tx_bytes += txbytes;
786 if (stat_maxcq > conn->prof.maxcqueue)
787 conn->prof.maxcqueue = stat_maxcq;
791 static void conn_action_connaccept(fsm_instance *fi, int event, void *arg)
793 struct iucv_event *ev = arg;
794 struct iucv_connection *conn = ev->conn;
795 struct iucv_path *path = ev->data;
796 struct net_device *netdev = conn->netdev;
797 struct netiucv_priv *privptr = netdev_priv(netdev);
800 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
803 path->msglim = NETIUCV_QUEUELEN_DEFAULT;
805 rc = iucv_path_accept(path, &netiucv_handler, NULL, conn);
807 PRINT_WARN("%s: IUCV accept failed with error %d\n",
809 IUCV_DBF_TEXT_(setup, 2, "rc %d from iucv_accept", rc);
812 fsm_newstate(fi, CONN_STATE_IDLE);
813 netdev->tx_queue_len = conn->path->msglim;
814 fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev);
817 static void conn_action_connreject(fsm_instance *fi, int event, void *arg)
819 struct iucv_event *ev = arg;
820 struct iucv_path *path = ev->data;
822 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
823 iucv_path_sever(path, NULL);
826 static void conn_action_connack(fsm_instance *fi, int event, void *arg)
828 struct iucv_connection *conn = arg;
829 struct net_device *netdev = conn->netdev;
830 struct netiucv_priv *privptr = netdev_priv(netdev);
832 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
833 fsm_deltimer(&conn->timer);
834 fsm_newstate(fi, CONN_STATE_IDLE);
835 netdev->tx_queue_len = conn->path->msglim;
836 fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev);
839 static void conn_action_conntimsev(fsm_instance *fi, int event, void *arg)
841 struct iucv_connection *conn = arg;
843 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
844 fsm_deltimer(&conn->timer);
845 iucv_path_sever(conn->path, NULL);
846 fsm_newstate(fi, CONN_STATE_STARTWAIT);
849 static void conn_action_connsever(fsm_instance *fi, int event, void *arg)
851 struct iucv_connection *conn = arg;
852 struct net_device *netdev = conn->netdev;
853 struct netiucv_priv *privptr = netdev_priv(netdev);
855 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
857 fsm_deltimer(&conn->timer);
858 iucv_path_sever(conn->path, NULL);
859 PRINT_INFO("%s: Remote dropped connection\n", netdev->name);
860 IUCV_DBF_TEXT(data, 2,
861 "conn_action_connsever: Remote dropped connection\n");
862 fsm_newstate(fi, CONN_STATE_STARTWAIT);
863 fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev);
866 static void conn_action_start(fsm_instance *fi, int event, void *arg)
868 struct iucv_connection *conn = arg;
871 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
873 fsm_newstate(fi, CONN_STATE_STARTWAIT);
874 PRINT_DEBUG("%s('%s'): connecting ...\n",
875 conn->netdev->name, conn->userid);
878 * We must set the state before calling iucv_connect because the
879 * callback handler could be called at any point after the connection
883 fsm_newstate(fi, CONN_STATE_SETUPWAIT);
884 conn->path = iucv_path_alloc(NETIUCV_QUEUELEN_DEFAULT, 0, GFP_KERNEL);
885 rc = iucv_path_connect(conn->path, &netiucv_handler, conn->userid,
886 NULL, iucvMagic, conn);
889 conn->netdev->tx_queue_len = conn->path->msglim;
890 fsm_addtimer(&conn->timer, NETIUCV_TIMEOUT_5SEC,
891 CONN_EVENT_TIMER, conn);
894 PRINT_INFO("%s: User %s is currently not available.\n",
896 netiucv_printname(conn->userid));
897 fsm_newstate(fi, CONN_STATE_STARTWAIT);
900 PRINT_INFO("%s: User %s is currently not ready.\n",
902 netiucv_printname(conn->userid));
903 fsm_newstate(fi, CONN_STATE_STARTWAIT);
906 PRINT_WARN("%s: Too many IUCV connections.\n",
908 fsm_newstate(fi, CONN_STATE_CONNERR);
911 PRINT_WARN("%s: User %s has too many IUCV connections.\n",
913 netiucv_printname(conn->userid));
914 fsm_newstate(fi, CONN_STATE_CONNERR);
917 PRINT_WARN("%s: No IUCV authorization in CP directory.\n",
919 fsm_newstate(fi, CONN_STATE_CONNERR);
922 PRINT_WARN("%s: iucv_connect returned error %d\n",
923 conn->netdev->name, rc);
924 fsm_newstate(fi, CONN_STATE_CONNERR);
927 IUCV_DBF_TEXT_(setup, 5, "iucv_connect rc is %d\n", rc);
932 static void netiucv_purge_skb_queue(struct sk_buff_head *q)
936 while ((skb = skb_dequeue(q))) {
937 atomic_dec(&skb->users);
938 dev_kfree_skb_any(skb);
942 static void conn_action_stop(fsm_instance *fi, int event, void *arg)
944 struct iucv_event *ev = arg;
945 struct iucv_connection *conn = ev->conn;
946 struct net_device *netdev = conn->netdev;
947 struct netiucv_priv *privptr = netdev_priv(netdev);
949 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
951 fsm_deltimer(&conn->timer);
952 fsm_newstate(fi, CONN_STATE_STOPPED);
953 netiucv_purge_skb_queue(&conn->collect_queue);
955 IUCV_DBF_TEXT(trace, 5, "calling iucv_path_sever\n");
956 iucv_path_sever(conn->path, iucvMagic);
960 netiucv_purge_skb_queue(&conn->commit_queue);
961 fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev);
964 static void conn_action_inval(fsm_instance *fi, int event, void *arg)
966 struct iucv_connection *conn = arg;
967 struct net_device *netdev = conn->netdev;
969 PRINT_WARN("%s: Cannot connect without username\n", netdev->name);
970 IUCV_DBF_TEXT(data, 2, "conn_action_inval called\n");
973 static const fsm_node conn_fsm[] = {
974 { CONN_STATE_INVALID, CONN_EVENT_START, conn_action_inval },
975 { CONN_STATE_STOPPED, CONN_EVENT_START, conn_action_start },
977 { CONN_STATE_STOPPED, CONN_EVENT_STOP, conn_action_stop },
978 { CONN_STATE_STARTWAIT, CONN_EVENT_STOP, conn_action_stop },
979 { CONN_STATE_SETUPWAIT, CONN_EVENT_STOP, conn_action_stop },
980 { CONN_STATE_IDLE, CONN_EVENT_STOP, conn_action_stop },
981 { CONN_STATE_TX, CONN_EVENT_STOP, conn_action_stop },
982 { CONN_STATE_REGERR, CONN_EVENT_STOP, conn_action_stop },
983 { CONN_STATE_CONNERR, CONN_EVENT_STOP, conn_action_stop },
985 { CONN_STATE_STOPPED, CONN_EVENT_CONN_REQ, conn_action_connreject },
986 { CONN_STATE_STARTWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept },
987 { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept },
988 { CONN_STATE_IDLE, CONN_EVENT_CONN_REQ, conn_action_connreject },
989 { CONN_STATE_TX, CONN_EVENT_CONN_REQ, conn_action_connreject },
991 { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_ACK, conn_action_connack },
992 { CONN_STATE_SETUPWAIT, CONN_EVENT_TIMER, conn_action_conntimsev },
994 { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REJ, conn_action_connsever },
995 { CONN_STATE_IDLE, CONN_EVENT_CONN_REJ, conn_action_connsever },
996 { CONN_STATE_TX, CONN_EVENT_CONN_REJ, conn_action_connsever },
998 { CONN_STATE_IDLE, CONN_EVENT_RX, conn_action_rx },
999 { CONN_STATE_TX, CONN_EVENT_RX, conn_action_rx },
1001 { CONN_STATE_TX, CONN_EVENT_TXDONE, conn_action_txdone },
1002 { CONN_STATE_IDLE, CONN_EVENT_TXDONE, conn_action_txdone },
1005 static const int CONN_FSM_LEN = sizeof(conn_fsm) / sizeof(fsm_node);
1009 * Actions for interface - statemachine.
1014 * @fi: An instance of an interface statemachine.
1015 * @event: The event, just happened.
1016 * @arg: Generic pointer, casted from struct net_device * upon call.
1018 * Startup connection by sending CONN_EVENT_START to it.
1020 static void dev_action_start(fsm_instance *fi, int event, void *arg)
1022 struct net_device *dev = arg;
1023 struct netiucv_priv *privptr = netdev_priv(dev);
1025 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
1027 fsm_newstate(fi, DEV_STATE_STARTWAIT);
1028 fsm_event(privptr->conn->fsm, CONN_EVENT_START, privptr->conn);
1032 * Shutdown connection by sending CONN_EVENT_STOP to it.
1034 * @param fi An instance of an interface statemachine.
1035 * @param event The event, just happened.
1036 * @param arg Generic pointer, casted from struct net_device * upon call.
1039 dev_action_stop(fsm_instance *fi, int event, void *arg)
1041 struct net_device *dev = arg;
1042 struct netiucv_priv *privptr = netdev_priv(dev);
1043 struct iucv_event ev;
1045 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
1047 ev.conn = privptr->conn;
1049 fsm_newstate(fi, DEV_STATE_STOPWAIT);
1050 fsm_event(privptr->conn->fsm, CONN_EVENT_STOP, &ev);
1054 * Called from connection statemachine
1055 * when a connection is up and running.
1057 * @param fi An instance of an interface statemachine.
1058 * @param event The event, just happened.
1059 * @param arg Generic pointer, casted from struct net_device * upon call.
1062 dev_action_connup(fsm_instance *fi, int event, void *arg)
1064 struct net_device *dev = arg;
1065 struct netiucv_priv *privptr = netdev_priv(dev);
1067 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
1069 switch (fsm_getstate(fi)) {
1070 case DEV_STATE_STARTWAIT:
1071 fsm_newstate(fi, DEV_STATE_RUNNING);
1072 PRINT_INFO("%s: connected with remote side %s\n",
1073 dev->name, privptr->conn->userid);
1074 IUCV_DBF_TEXT(setup, 3,
1075 "connection is up and running\n");
1077 case DEV_STATE_STOPWAIT:
1079 "%s: got connection UP event during shutdown!\n",
1081 IUCV_DBF_TEXT(data, 2,
1082 "dev_action_connup: in DEV_STATE_STOPWAIT\n");
1088 * Called from connection statemachine
1089 * when a connection has been shutdown.
1091 * @param fi An instance of an interface statemachine.
1092 * @param event The event, just happened.
1093 * @param arg Generic pointer, casted from struct net_device * upon call.
1096 dev_action_conndown(fsm_instance *fi, int event, void *arg)
1098 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
1100 switch (fsm_getstate(fi)) {
1101 case DEV_STATE_RUNNING:
1102 fsm_newstate(fi, DEV_STATE_STARTWAIT);
1104 case DEV_STATE_STOPWAIT:
1105 fsm_newstate(fi, DEV_STATE_STOPPED);
1106 IUCV_DBF_TEXT(setup, 3, "connection is down\n");
1111 static const fsm_node dev_fsm[] = {
1112 { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start },
1114 { DEV_STATE_STOPWAIT, DEV_EVENT_START, dev_action_start },
1115 { DEV_STATE_STOPWAIT, DEV_EVENT_CONDOWN, dev_action_conndown },
1117 { DEV_STATE_STARTWAIT, DEV_EVENT_STOP, dev_action_stop },
1118 { DEV_STATE_STARTWAIT, DEV_EVENT_CONUP, dev_action_connup },
1120 { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop },
1121 { DEV_STATE_RUNNING, DEV_EVENT_CONDOWN, dev_action_conndown },
1122 { DEV_STATE_RUNNING, DEV_EVENT_CONUP, fsm_action_nop },
1125 static const int DEV_FSM_LEN = sizeof(dev_fsm) / sizeof(fsm_node);
1128 * Transmit a packet.
1129 * This is a helper function for netiucv_tx().
1131 * @param conn Connection to be used for sending.
1132 * @param skb Pointer to struct sk_buff of packet to send.
1133 * The linklevel header has already been set up
1136 * @return 0 on success, -ERRNO on failure. (Never fails.)
1138 static int netiucv_transmit_skb(struct iucv_connection *conn,
1139 struct sk_buff *skb)
1141 struct iucv_message msg;
1142 unsigned long saveflags;
1143 struct ll_header header;
1146 if (fsm_getstate(conn->fsm) != CONN_STATE_IDLE) {
1147 int l = skb->len + NETIUCV_HDRLEN;
1149 spin_lock_irqsave(&conn->collect_lock, saveflags);
1150 if (conn->collect_len + l >
1151 (conn->max_buffsize - NETIUCV_HDRLEN)) {
1153 IUCV_DBF_TEXT(data, 2,
1154 "EBUSY from netiucv_transmit_skb\n");
1156 atomic_inc(&skb->users);
1157 skb_queue_tail(&conn->collect_queue, skb);
1158 conn->collect_len += l;
1161 spin_unlock_irqrestore(&conn->collect_lock, saveflags);
1163 struct sk_buff *nskb = skb;
1165 * Copy the skb to a new allocated skb in lowmem only if the
1166 * data is located above 2G in memory or tailroom is < 2.
1169 ((unsigned long)(skb->tail + NETIUCV_HDRLEN)) >> 31;
1171 if (hi || (skb_tailroom(skb) < 2)) {
1172 nskb = alloc_skb(skb->len + NETIUCV_HDRLEN +
1173 NETIUCV_HDRLEN, GFP_ATOMIC | GFP_DMA);
1175 PRINT_WARN("%s: Could not allocate tx_skb\n",
1176 conn->netdev->name);
1177 IUCV_DBF_TEXT(data, 2, "alloc_skb failed\n");
1181 skb_reserve(nskb, NETIUCV_HDRLEN);
1182 memcpy(skb_put(nskb, skb->len),
1183 skb->data, skb->len);
1188 * skb now is below 2G and has enough room. Add headers.
1190 header.next = nskb->len + NETIUCV_HDRLEN;
1191 memcpy(skb_push(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN);
1193 memcpy(skb_put(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN);
1195 fsm_newstate(conn->fsm, CONN_STATE_TX);
1196 conn->prof.send_stamp = xtime;
1200 rc = iucv_message_send(conn->path, &msg, 0, 0,
1201 nskb->data, nskb->len);
1202 conn->prof.doios_single++;
1203 conn->prof.txlen += skb->len;
1204 conn->prof.tx_pending++;
1205 if (conn->prof.tx_pending > conn->prof.tx_max_pending)
1206 conn->prof.tx_max_pending = conn->prof.tx_pending;
1208 struct netiucv_priv *privptr;
1209 fsm_newstate(conn->fsm, CONN_STATE_IDLE);
1210 conn->prof.tx_pending--;
1211 privptr = netdev_priv(conn->netdev);
1213 privptr->stats.tx_errors++;
1215 dev_kfree_skb(nskb);
1218 * Remove our headers. They get added
1219 * again on retransmit.
1221 skb_pull(skb, NETIUCV_HDRLEN);
1222 skb_trim(skb, skb->len - NETIUCV_HDRLEN);
1224 PRINT_WARN("iucv_send returned %08x\n", rc);
1225 IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc);
1229 atomic_inc(&nskb->users);
1230 skb_queue_tail(&conn->commit_queue, nskb);
1238 * Interface API for upper network layers
1242 * Open an interface.
1243 * Called from generic network layer when ifconfig up is run.
1245 * @param dev Pointer to interface struct.
1247 * @return 0 on success, -ERRNO on failure. (Never fails.)
1249 static int netiucv_open(struct net_device *dev)
1251 struct netiucv_priv *priv = netdev_priv(dev);
1253 fsm_event(priv->fsm, DEV_EVENT_START, dev);
1258 * Close an interface.
1259 * Called from generic network layer when ifconfig down is run.
1261 * @param dev Pointer to interface struct.
1263 * @return 0 on success, -ERRNO on failure. (Never fails.)
1265 static int netiucv_close(struct net_device *dev)
1267 struct netiucv_priv *priv = netdev_priv(dev);
1269 fsm_event(priv->fsm, DEV_EVENT_STOP, dev);
1274 * Start transmission of a packet.
1275 * Called from generic network device layer.
1277 * @param skb Pointer to buffer containing the packet.
1278 * @param dev Pointer to interface struct.
1280 * @return 0 if packet consumed, !0 if packet rejected.
1281 * Note: If we return !0, then the packet is free'd by
1282 * the generic network layer.
1284 static int netiucv_tx(struct sk_buff *skb, struct net_device *dev)
1286 struct netiucv_priv *privptr = netdev_priv(dev);
1289 IUCV_DBF_TEXT(trace, 4, __FUNCTION__);
1291 * Some sanity checks ...
1294 PRINT_WARN("%s: NULL sk_buff passed\n", dev->name);
1295 IUCV_DBF_TEXT(data, 2, "netiucv_tx: skb is NULL\n");
1296 privptr->stats.tx_dropped++;
1299 if (skb_headroom(skb) < NETIUCV_HDRLEN) {
1300 PRINT_WARN("%s: Got sk_buff with head room < %ld bytes\n",
1301 dev->name, NETIUCV_HDRLEN);
1302 IUCV_DBF_TEXT(data, 2,
1303 "netiucv_tx: skb_headroom < NETIUCV_HDRLEN\n");
1305 privptr->stats.tx_dropped++;
1310 * If connection is not running, try to restart it
1311 * and throw away packet.
1313 if (fsm_getstate(privptr->fsm) != DEV_STATE_RUNNING) {
1314 fsm_event(privptr->fsm, DEV_EVENT_START, dev);
1316 privptr->stats.tx_dropped++;
1317 privptr->stats.tx_errors++;
1318 privptr->stats.tx_carrier_errors++;
1322 if (netiucv_test_and_set_busy(dev)) {
1323 IUCV_DBF_TEXT(data, 2, "EBUSY from netiucv_tx\n");
1326 dev->trans_start = jiffies;
1327 rc = netiucv_transmit_skb(privptr->conn, skb) != 0;
1328 netiucv_clear_busy(dev);
1334 * @dev: Pointer to interface struct.
1336 * Returns interface statistics of a device.
1338 * Returns pointer to stats struct of this interface.
1340 static struct net_device_stats *netiucv_stats (struct net_device * dev)
1342 struct netiucv_priv *priv = netdev_priv(dev);
1344 IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
1345 return &priv->stats;
1349 * netiucv_change_mtu
1350 * @dev: Pointer to interface struct.
1351 * @new_mtu: The new MTU to use for this interface.
1353 * Sets MTU of an interface.
1355 * Returns 0 on success, -EINVAL if MTU is out of valid range.
1356 * (valid range is 576 .. NETIUCV_MTU_MAX).
1358 static int netiucv_change_mtu(struct net_device * dev, int new_mtu)
1360 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
1361 if (new_mtu < 576 || new_mtu > NETIUCV_MTU_MAX) {
1362 IUCV_DBF_TEXT(setup, 2, "given MTU out of valid range\n");
1370 * attributes in sysfs
1373 static ssize_t user_show(struct device *dev, struct device_attribute *attr,
1376 struct netiucv_priv *priv = dev->driver_data;
1378 IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
1379 return sprintf(buf, "%s\n", netiucv_printname(priv->conn->userid));
1382 static ssize_t user_write(struct device *dev, struct device_attribute *attr,
1383 const char *buf, size_t count)
1385 struct netiucv_priv *priv = dev->driver_data;
1386 struct net_device *ndev = priv->conn->netdev;
1391 struct iucv_connection *cp;
1393 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
1395 PRINT_WARN("netiucv: username too long (%d)!\n", (int) count);
1396 IUCV_DBF_TEXT_(setup, 2,
1397 "%d is length of username\n", (int) count);
1401 tmp = strsep((char **) &buf, "\n");
1402 for (i = 0, p = tmp; i < 8 && *p; i++, p++) {
1403 if (isalnum(*p) || (*p == '$')) {
1404 username[i]= toupper(*p);
1408 /* trailing lf, grr */
1411 PRINT_WARN("netiucv: Invalid char %c in username!\n", *p);
1412 IUCV_DBF_TEXT_(setup, 2,
1413 "username: invalid character %c\n", *p);
1417 username[i++] = ' ';
1420 if (memcmp(username, priv->conn->userid, 9) &&
1421 (ndev->flags & (IFF_UP | IFF_RUNNING))) {
1422 /* username changed while the interface is active. */
1423 PRINT_WARN("netiucv: device %s active, connected to %s\n",
1424 dev->bus_id, priv->conn->userid);
1425 PRINT_WARN("netiucv: user cannot be updated\n");
1426 IUCV_DBF_TEXT(setup, 2, "user_write: device active\n");
1429 read_lock_bh(&iucv_connection_rwlock);
1430 list_for_each_entry(cp, &iucv_connection_list, list) {
1431 if (!strncmp(username, cp->userid, 9) && cp->netdev != ndev) {
1432 read_unlock_bh(&iucv_connection_rwlock);
1433 PRINT_WARN("netiucv: Connection to %s already "
1434 "exists\n", username);
1438 read_unlock_bh(&iucv_connection_rwlock);
1439 memcpy(priv->conn->userid, username, 9);
1443 static DEVICE_ATTR(user, 0644, user_show, user_write);
1445 static ssize_t buffer_show (struct device *dev, struct device_attribute *attr,
1447 { struct netiucv_priv *priv = dev->driver_data;
1449 IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
1450 return sprintf(buf, "%d\n", priv->conn->max_buffsize);
1453 static ssize_t buffer_write (struct device *dev, struct device_attribute *attr,
1454 const char *buf, size_t count)
1456 struct netiucv_priv *priv = dev->driver_data;
1457 struct net_device *ndev = priv->conn->netdev;
1461 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
1465 bs1 = simple_strtoul(buf, &e, 0);
1467 if (e && (!isspace(*e))) {
1468 PRINT_WARN("netiucv: Invalid character in buffer!\n");
1469 IUCV_DBF_TEXT_(setup, 2, "buffer_write: invalid char %c\n", *e);
1472 if (bs1 > NETIUCV_BUFSIZE_MAX) {
1473 PRINT_WARN("netiucv: Given buffer size %d too large.\n",
1475 IUCV_DBF_TEXT_(setup, 2,
1476 "buffer_write: buffer size %d too large\n",
1480 if ((ndev->flags & IFF_RUNNING) &&
1481 (bs1 < (ndev->mtu + NETIUCV_HDRLEN + 2))) {
1482 PRINT_WARN("netiucv: Given buffer size %d too small.\n",
1484 IUCV_DBF_TEXT_(setup, 2,
1485 "buffer_write: buffer size %d too small\n",
1489 if (bs1 < (576 + NETIUCV_HDRLEN + NETIUCV_HDRLEN)) {
1490 PRINT_WARN("netiucv: Given buffer size %d too small.\n",
1492 IUCV_DBF_TEXT_(setup, 2,
1493 "buffer_write: buffer size %d too small\n",
1498 priv->conn->max_buffsize = bs1;
1499 if (!(ndev->flags & IFF_RUNNING))
1500 ndev->mtu = bs1 - NETIUCV_HDRLEN - NETIUCV_HDRLEN;
1506 static DEVICE_ATTR(buffer, 0644, buffer_show, buffer_write);
1508 static ssize_t dev_fsm_show (struct device *dev, struct device_attribute *attr,
1511 struct netiucv_priv *priv = dev->driver_data;
1513 IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
1514 return sprintf(buf, "%s\n", fsm_getstate_str(priv->fsm));
1517 static DEVICE_ATTR(device_fsm_state, 0444, dev_fsm_show, NULL);
1519 static ssize_t conn_fsm_show (struct device *dev,
1520 struct device_attribute *attr, char *buf)
1522 struct netiucv_priv *priv = dev->driver_data;
1524 IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
1525 return sprintf(buf, "%s\n", fsm_getstate_str(priv->conn->fsm));
1528 static DEVICE_ATTR(connection_fsm_state, 0444, conn_fsm_show, NULL);
1530 static ssize_t maxmulti_show (struct device *dev,
1531 struct device_attribute *attr, char *buf)
1533 struct netiucv_priv *priv = dev->driver_data;
1535 IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
1536 return sprintf(buf, "%ld\n", priv->conn->prof.maxmulti);
1539 static ssize_t maxmulti_write (struct device *dev,
1540 struct device_attribute *attr,
1541 const char *buf, size_t count)
1543 struct netiucv_priv *priv = dev->driver_data;
1545 IUCV_DBF_TEXT(trace, 4, __FUNCTION__);
1546 priv->conn->prof.maxmulti = 0;
1550 static DEVICE_ATTR(max_tx_buffer_used, 0644, maxmulti_show, maxmulti_write);
1552 static ssize_t maxcq_show (struct device *dev, struct device_attribute *attr,
1555 struct netiucv_priv *priv = dev->driver_data;
1557 IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
1558 return sprintf(buf, "%ld\n", priv->conn->prof.maxcqueue);
1561 static ssize_t maxcq_write (struct device *dev, struct device_attribute *attr,
1562 const char *buf, size_t count)
1564 struct netiucv_priv *priv = dev->driver_data;
1566 IUCV_DBF_TEXT(trace, 4, __FUNCTION__);
1567 priv->conn->prof.maxcqueue = 0;
1571 static DEVICE_ATTR(max_chained_skbs, 0644, maxcq_show, maxcq_write);
1573 static ssize_t sdoio_show (struct device *dev, struct device_attribute *attr,
1576 struct netiucv_priv *priv = dev->driver_data;
1578 IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
1579 return sprintf(buf, "%ld\n", priv->conn->prof.doios_single);
1582 static ssize_t sdoio_write (struct device *dev, struct device_attribute *attr,
1583 const char *buf, size_t count)
1585 struct netiucv_priv *priv = dev->driver_data;
1587 IUCV_DBF_TEXT(trace, 4, __FUNCTION__);
1588 priv->conn->prof.doios_single = 0;
1592 static DEVICE_ATTR(tx_single_write_ops, 0644, sdoio_show, sdoio_write);
1594 static ssize_t mdoio_show (struct device *dev, struct device_attribute *attr,
1597 struct netiucv_priv *priv = dev->driver_data;
1599 IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
1600 return sprintf(buf, "%ld\n", priv->conn->prof.doios_multi);
1603 static ssize_t mdoio_write (struct device *dev, struct device_attribute *attr,
1604 const char *buf, size_t count)
1606 struct netiucv_priv *priv = dev->driver_data;
1608 IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
1609 priv->conn->prof.doios_multi = 0;
1613 static DEVICE_ATTR(tx_multi_write_ops, 0644, mdoio_show, mdoio_write);
1615 static ssize_t txlen_show (struct device *dev, struct device_attribute *attr,
1618 struct netiucv_priv *priv = dev->driver_data;
1620 IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
1621 return sprintf(buf, "%ld\n", priv->conn->prof.txlen);
1624 static ssize_t txlen_write (struct device *dev, struct device_attribute *attr,
1625 const char *buf, size_t count)
1627 struct netiucv_priv *priv = dev->driver_data;
1629 IUCV_DBF_TEXT(trace, 4, __FUNCTION__);
1630 priv->conn->prof.txlen = 0;
1634 static DEVICE_ATTR(netto_bytes, 0644, txlen_show, txlen_write);
1636 static ssize_t txtime_show (struct device *dev, struct device_attribute *attr,
1639 struct netiucv_priv *priv = dev->driver_data;
1641 IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
1642 return sprintf(buf, "%ld\n", priv->conn->prof.tx_time);
1645 static ssize_t txtime_write (struct device *dev, struct device_attribute *attr,
1646 const char *buf, size_t count)
1648 struct netiucv_priv *priv = dev->driver_data;
1650 IUCV_DBF_TEXT(trace, 4, __FUNCTION__);
1651 priv->conn->prof.tx_time = 0;
1655 static DEVICE_ATTR(max_tx_io_time, 0644, txtime_show, txtime_write);
1657 static ssize_t txpend_show (struct device *dev, struct device_attribute *attr,
1660 struct netiucv_priv *priv = dev->driver_data;
1662 IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
1663 return sprintf(buf, "%ld\n", priv->conn->prof.tx_pending);
1666 static ssize_t txpend_write (struct device *dev, struct device_attribute *attr,
1667 const char *buf, size_t count)
1669 struct netiucv_priv *priv = dev->driver_data;
1671 IUCV_DBF_TEXT(trace, 4, __FUNCTION__);
1672 priv->conn->prof.tx_pending = 0;
1676 static DEVICE_ATTR(tx_pending, 0644, txpend_show, txpend_write);
1678 static ssize_t txmpnd_show (struct device *dev, struct device_attribute *attr,
1681 struct netiucv_priv *priv = dev->driver_data;
1683 IUCV_DBF_TEXT(trace, 5, __FUNCTION__);
1684 return sprintf(buf, "%ld\n", priv->conn->prof.tx_max_pending);
1687 static ssize_t txmpnd_write (struct device *dev, struct device_attribute *attr,
1688 const char *buf, size_t count)
1690 struct netiucv_priv *priv = dev->driver_data;
1692 IUCV_DBF_TEXT(trace, 4, __FUNCTION__);
1693 priv->conn->prof.tx_max_pending = 0;
1697 static DEVICE_ATTR(tx_max_pending, 0644, txmpnd_show, txmpnd_write);
1699 static struct attribute *netiucv_attrs[] = {
1700 &dev_attr_buffer.attr,
1701 &dev_attr_user.attr,
1705 static struct attribute_group netiucv_attr_group = {
1706 .attrs = netiucv_attrs,
1709 static struct attribute *netiucv_stat_attrs[] = {
1710 &dev_attr_device_fsm_state.attr,
1711 &dev_attr_connection_fsm_state.attr,
1712 &dev_attr_max_tx_buffer_used.attr,
1713 &dev_attr_max_chained_skbs.attr,
1714 &dev_attr_tx_single_write_ops.attr,
1715 &dev_attr_tx_multi_write_ops.attr,
1716 &dev_attr_netto_bytes.attr,
1717 &dev_attr_max_tx_io_time.attr,
1718 &dev_attr_tx_pending.attr,
1719 &dev_attr_tx_max_pending.attr,
1723 static struct attribute_group netiucv_stat_attr_group = {
1725 .attrs = netiucv_stat_attrs,
1728 static inline int netiucv_add_files(struct device *dev)
1732 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
1733 ret = sysfs_create_group(&dev->kobj, &netiucv_attr_group);
1736 ret = sysfs_create_group(&dev->kobj, &netiucv_stat_attr_group);
1738 sysfs_remove_group(&dev->kobj, &netiucv_attr_group);
1742 static inline void netiucv_remove_files(struct device *dev)
1744 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
1745 sysfs_remove_group(&dev->kobj, &netiucv_stat_attr_group);
1746 sysfs_remove_group(&dev->kobj, &netiucv_attr_group);
1749 static int netiucv_register_device(struct net_device *ndev)
1751 struct netiucv_priv *priv = netdev_priv(ndev);
1752 struct device *dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1756 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
1759 snprintf(dev->bus_id, BUS_ID_SIZE, "net%s", ndev->name);
1760 dev->bus = &iucv_bus;
1761 dev->parent = iucv_root;
1763 * The release function could be called after the
1764 * module has been unloaded. It's _only_ task is to
1765 * free the struct. Therefore, we specify kfree()
1766 * directly here. (Probably a little bit obfuscating
1767 * but legitime ...).
1769 dev->release = (void (*)(struct device *))kfree;
1770 dev->driver = &netiucv_driver;
1774 ret = device_register(dev);
1778 ret = netiucv_add_files(dev);
1782 dev->driver_data = priv;
1786 device_unregister(dev);
1790 static void netiucv_unregister_device(struct device *dev)
1792 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
1793 netiucv_remove_files(dev);
1794 device_unregister(dev);
1798 * Allocate and initialize a new connection structure.
1799 * Add it to the list of netiucv connections;
1801 static struct iucv_connection *netiucv_new_connection(struct net_device *dev,
1804 struct iucv_connection *conn;
1806 conn = kzalloc(sizeof(*conn), GFP_KERNEL);
1809 skb_queue_head_init(&conn->collect_queue);
1810 skb_queue_head_init(&conn->commit_queue);
1811 spin_lock_init(&conn->collect_lock);
1812 conn->max_buffsize = NETIUCV_BUFSIZE_DEFAULT;
1815 conn->rx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA);
1818 conn->tx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA);
1821 conn->fsm = init_fsm("netiucvconn", conn_state_names,
1822 conn_event_names, NR_CONN_STATES,
1823 NR_CONN_EVENTS, conn_fsm, CONN_FSM_LEN,
1828 fsm_settimer(conn->fsm, &conn->timer);
1829 fsm_newstate(conn->fsm, CONN_STATE_INVALID);
1832 memcpy(conn->userid, username, 9);
1833 fsm_newstate(conn->fsm, CONN_STATE_STOPPED);
1836 write_lock_bh(&iucv_connection_rwlock);
1837 list_add_tail(&conn->list, &iucv_connection_list);
1838 write_unlock_bh(&iucv_connection_rwlock);
1842 kfree_skb(conn->tx_buff);
1844 kfree_skb(conn->rx_buff);
1852 * Release a connection structure and remove it from the
1853 * list of netiucv connections.
1855 static void netiucv_remove_connection(struct iucv_connection *conn)
1857 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
1858 write_lock_bh(&iucv_connection_rwlock);
1859 list_del_init(&conn->list);
1860 write_unlock_bh(&iucv_connection_rwlock);
1862 iucv_path_sever(conn->path, iucvMagic);
1866 fsm_deltimer(&conn->timer);
1867 kfree_fsm(conn->fsm);
1868 kfree_skb(conn->rx_buff);
1869 kfree_skb(conn->tx_buff);
1873 * Release everything of a net device.
1875 static void netiucv_free_netdevice(struct net_device *dev)
1877 struct netiucv_priv *privptr = netdev_priv(dev);
1879 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
1886 netiucv_remove_connection(privptr->conn);
1888 kfree_fsm(privptr->fsm);
1889 privptr->conn = NULL; privptr->fsm = NULL;
1890 /* privptr gets freed by free_netdev() */
1896 * Initialize a net device. (Called from kernel in alloc_netdev())
1898 static void netiucv_setup_netdevice(struct net_device *dev)
1900 dev->mtu = NETIUCV_MTU_DEFAULT;
1901 dev->hard_start_xmit = netiucv_tx;
1902 dev->open = netiucv_open;
1903 dev->stop = netiucv_close;
1904 dev->get_stats = netiucv_stats;
1905 dev->change_mtu = netiucv_change_mtu;
1906 dev->destructor = netiucv_free_netdevice;
1907 dev->hard_header_len = NETIUCV_HDRLEN;
1909 dev->type = ARPHRD_SLIP;
1910 dev->tx_queue_len = NETIUCV_QUEUELEN_DEFAULT;
1911 dev->flags = IFF_POINTOPOINT | IFF_NOARP;
1912 SET_MODULE_OWNER(dev);
1916 * Allocate and initialize everything of a net device.
1918 static struct net_device *netiucv_init_netdevice(char *username)
1920 struct netiucv_priv *privptr;
1921 struct net_device *dev;
1923 dev = alloc_netdev(sizeof(struct netiucv_priv), "iucv%d",
1924 netiucv_setup_netdevice);
1927 if (dev_alloc_name(dev, dev->name) < 0)
1930 privptr = netdev_priv(dev);
1931 privptr->fsm = init_fsm("netiucvdev", dev_state_names,
1932 dev_event_names, NR_DEV_STATES, NR_DEV_EVENTS,
1933 dev_fsm, DEV_FSM_LEN, GFP_KERNEL);
1937 privptr->conn = netiucv_new_connection(dev, username);
1938 if (!privptr->conn) {
1939 IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_new_connection\n");
1942 fsm_newstate(privptr->fsm, DEV_STATE_STOPPED);
1946 kfree_fsm(privptr->fsm);
1952 static ssize_t conn_write(struct device_driver *drv,
1953 const char *buf, size_t count)
1958 struct net_device *dev;
1959 struct netiucv_priv *priv;
1960 struct iucv_connection *cp;
1962 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
1964 PRINT_WARN("netiucv: username too long (%d)!\n", (int)count);
1965 IUCV_DBF_TEXT(setup, 2, "conn_write: too long\n");
1969 for (i = 0, p = buf; i < 8 && *p; i++, p++) {
1970 if (isalnum(*p) || *p == '$') {
1971 username[i] = toupper(*p);
1975 /* trailing lf, grr */
1977 PRINT_WARN("netiucv: Invalid character in username!\n");
1978 IUCV_DBF_TEXT_(setup, 2,
1979 "conn_write: invalid character %c\n", *p);
1983 username[i++] = ' ';
1986 read_lock_bh(&iucv_connection_rwlock);
1987 list_for_each_entry(cp, &iucv_connection_list, list) {
1988 if (!strncmp(username, cp->userid, 9)) {
1989 read_unlock_bh(&iucv_connection_rwlock);
1990 PRINT_WARN("netiucv: Connection to %s already "
1991 "exists\n", username);
1995 read_unlock_bh(&iucv_connection_rwlock);
1997 dev = netiucv_init_netdevice(username);
1999 PRINT_WARN("netiucv: Could not allocate network device "
2000 "structure for user '%s'\n",
2001 netiucv_printname(username));
2002 IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_init_netdevice\n");
2006 rc = netiucv_register_device(dev);
2008 IUCV_DBF_TEXT_(setup, 2,
2009 "ret %d from netiucv_register_device\n", rc);
2014 priv = netdev_priv(dev);
2015 SET_NETDEV_DEV(dev, priv->dev);
2017 rc = register_netdev(dev);
2021 PRINT_INFO("%s: '%s'\n", dev->name, netiucv_printname(username));
2026 netiucv_unregister_device(priv->dev);
2028 PRINT_WARN("netiucv: Could not register '%s'\n", dev->name);
2029 IUCV_DBF_TEXT(setup, 2, "conn_write: could not register\n");
2030 netiucv_free_netdevice(dev);
2034 static DRIVER_ATTR(connection, 0200, NULL, conn_write);
2036 static ssize_t remove_write (struct device_driver *drv,
2037 const char *buf, size_t count)
2039 struct iucv_connection *cp;
2040 struct net_device *ndev;
2041 struct netiucv_priv *priv;
2043 char name[IFNAMSIZ];
2047 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
2049 if (count >= IFNAMSIZ)
2050 count = IFNAMSIZ - 1;;
2052 for (i = 0, p = buf; i < count && *p; i++, p++) {
2053 if (*p == '\n' || *p == ' ')
2054 /* trailing lf, grr */
2060 read_lock_bh(&iucv_connection_rwlock);
2061 list_for_each_entry(cp, &iucv_connection_list, list) {
2063 priv = netdev_priv(ndev);
2065 if (strncmp(name, ndev->name, count))
2067 read_unlock_bh(&iucv_connection_rwlock);
2068 if (ndev->flags & (IFF_UP | IFF_RUNNING)) {
2069 PRINT_WARN("netiucv: net device %s active with peer "
2070 "%s\n", ndev->name, priv->conn->userid);
2071 PRINT_WARN("netiucv: %s cannot be removed\n",
2073 IUCV_DBF_TEXT(data, 2, "remove_write: still active\n");
2076 unregister_netdev(ndev);
2077 netiucv_unregister_device(dev);
2080 read_unlock_bh(&iucv_connection_rwlock);
2081 PRINT_WARN("netiucv: net device %s unknown\n", name);
2082 IUCV_DBF_TEXT(data, 2, "remove_write: unknown device\n");
2086 static DRIVER_ATTR(remove, 0200, NULL, remove_write);
2088 static struct attribute * netiucv_drv_attrs[] = {
2089 &driver_attr_connection.attr,
2090 &driver_attr_remove.attr,
2094 static struct attribute_group netiucv_drv_attr_group = {
2095 .attrs = netiucv_drv_attrs,
2098 static void netiucv_banner(void)
2100 PRINT_INFO("NETIUCV driver initialized\n");
2103 static void __exit netiucv_exit(void)
2105 struct iucv_connection *cp;
2106 struct net_device *ndev;
2107 struct netiucv_priv *priv;
2110 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
2111 while (!list_empty(&iucv_connection_list)) {
2112 cp = list_entry(iucv_connection_list.next,
2113 struct iucv_connection, list);
2114 list_del(&cp->list);
2116 priv = netdev_priv(ndev);
2119 unregister_netdev(ndev);
2120 netiucv_unregister_device(dev);
2123 sysfs_remove_group(&netiucv_driver.kobj, &netiucv_drv_attr_group);
2124 driver_unregister(&netiucv_driver);
2125 iucv_unregister(&netiucv_handler, 1);
2126 iucv_unregister_dbf_views();
2128 PRINT_INFO("NETIUCV driver unloaded\n");
2132 static int __init netiucv_init(void)
2136 rc = iucv_register_dbf_views();
2139 rc = iucv_register(&netiucv_handler, 1);
2142 IUCV_DBF_TEXT(trace, 3, __FUNCTION__);
2143 rc = driver_register(&netiucv_driver);
2145 PRINT_ERR("NETIUCV: failed to register driver.\n");
2146 IUCV_DBF_TEXT_(setup, 2, "ret %d from driver_register\n", rc);
2150 rc = sysfs_create_group(&netiucv_driver.kobj, &netiucv_drv_attr_group);
2152 PRINT_ERR("NETIUCV: failed to add driver attributes.\n");
2153 IUCV_DBF_TEXT_(setup, 2,
2154 "ret %d - netiucv_drv_attr_group\n", rc);
2161 driver_unregister(&netiucv_driver);
2163 iucv_unregister(&netiucv_handler, 1);
2165 iucv_unregister_dbf_views();
2170 module_init(netiucv_init);
2171 module_exit(netiucv_exit);
2172 MODULE_LICENSE("GPL");