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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * IUCV network driver |
3 | * | |
4 | * Copyright (C) 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation | |
5 | * Author(s): Fritz Elfert (elfert@de.ibm.com, felfert@millenux.com) | |
6 | * | |
4ce3b30c CH |
7 | * Sysfs integration and all bugs therein by Cornelia Huck |
8 | * (cornelia.huck@de.ibm.com) | |
1da177e4 LT |
9 | * |
10 | * Documentation used: | |
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 | |
17 | * | |
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) | |
21 | * any later version. | |
22 | * | |
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. | |
27 | * | |
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. | |
31 | * | |
1da177e4 | 32 | */ |
e82b0f2c | 33 | |
1da177e4 LT |
34 | #undef DEBUG |
35 | ||
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> | |
46 | ||
47 | #include <linux/signal.h> | |
48 | #include <linux/string.h> | |
49 | #include <linux/device.h> | |
50 | ||
51 | #include <linux/ip.h> | |
52 | #include <linux/if_arp.h> | |
53 | #include <linux/tcp.h> | |
54 | #include <linux/skbuff.h> | |
55 | #include <linux/ctype.h> | |
56 | #include <net/dst.h> | |
57 | ||
58 | #include <asm/io.h> | |
59 | #include <asm/uaccess.h> | |
60 | ||
61 | #include "iucv.h" | |
62 | #include "fsm.h" | |
63 | ||
64 | MODULE_AUTHOR | |
65 | ("(C) 2001 IBM Corporation by Fritz Elfert (felfert@millenux.com)"); | |
66 | MODULE_DESCRIPTION ("Linux for S/390 IUCV network driver"); | |
67 | ||
e82b0f2c | 68 | |
1da177e4 LT |
69 | #define PRINTK_HEADER " iucv: " /* for debugging */ |
70 | ||
71 | static struct device_driver netiucv_driver = { | |
72 | .name = "netiucv", | |
73 | .bus = &iucv_bus, | |
74 | }; | |
75 | ||
76 | /** | |
77 | * Per connection profiling data | |
78 | */ | |
79 | struct connection_profile { | |
80 | unsigned long maxmulti; | |
81 | unsigned long maxcqueue; | |
82 | unsigned long doios_single; | |
83 | unsigned long doios_multi; | |
84 | unsigned long txlen; | |
85 | unsigned long tx_time; | |
86 | struct timespec send_stamp; | |
87 | unsigned long tx_pending; | |
88 | unsigned long tx_max_pending; | |
89 | }; | |
90 | ||
91 | /** | |
92 | * Representation of one iucv connection | |
93 | */ | |
94 | struct iucv_connection { | |
95 | struct iucv_connection *next; | |
96 | iucv_handle_t handle; | |
97 | __u16 pathid; | |
98 | struct sk_buff *rx_buff; | |
99 | struct sk_buff *tx_buff; | |
100 | struct sk_buff_head collect_queue; | |
101 | struct sk_buff_head commit_queue; | |
102 | spinlock_t collect_lock; | |
103 | int collect_len; | |
104 | int max_buffsize; | |
105 | fsm_timer timer; | |
106 | fsm_instance *fsm; | |
107 | struct net_device *netdev; | |
108 | struct connection_profile prof; | |
109 | char userid[9]; | |
110 | }; | |
111 | ||
112 | /** | |
113 | * Linked list of all connection structs. | |
114 | */ | |
16a83b30 FP |
115 | struct iucv_connection_struct { |
116 | struct iucv_connection *iucv_connections; | |
117 | rwlock_t iucv_rwlock; | |
118 | }; | |
119 | ||
120 | static struct iucv_connection_struct iucv_conns; | |
1da177e4 LT |
121 | |
122 | /** | |
123 | * Representation of event-data for the | |
124 | * connection state machine. | |
125 | */ | |
126 | struct iucv_event { | |
127 | struct iucv_connection *conn; | |
128 | void *data; | |
129 | }; | |
130 | ||
131 | /** | |
132 | * Private part of the network device structure | |
133 | */ | |
134 | struct netiucv_priv { | |
135 | struct net_device_stats stats; | |
136 | unsigned long tbusy; | |
137 | fsm_instance *fsm; | |
138 | struct iucv_connection *conn; | |
139 | struct device *dev; | |
140 | }; | |
141 | ||
142 | /** | |
143 | * Link level header for a packet. | |
144 | */ | |
145 | typedef struct ll_header_t { | |
146 | __u16 next; | |
147 | } ll_header; | |
148 | ||
149 | #define NETIUCV_HDRLEN (sizeof(ll_header)) | |
150 | #define NETIUCV_BUFSIZE_MAX 32768 | |
151 | #define NETIUCV_BUFSIZE_DEFAULT NETIUCV_BUFSIZE_MAX | |
152 | #define NETIUCV_MTU_MAX (NETIUCV_BUFSIZE_MAX - NETIUCV_HDRLEN) | |
153 | #define NETIUCV_MTU_DEFAULT 9216 | |
154 | #define NETIUCV_QUEUELEN_DEFAULT 50 | |
155 | #define NETIUCV_TIMEOUT_5SEC 5000 | |
156 | ||
157 | /** | |
158 | * Compatibility macros for busy handling | |
159 | * of network devices. | |
160 | */ | |
161 | static __inline__ void netiucv_clear_busy(struct net_device *dev) | |
162 | { | |
163 | clear_bit(0, &(((struct netiucv_priv *)dev->priv)->tbusy)); | |
164 | netif_wake_queue(dev); | |
165 | } | |
166 | ||
167 | static __inline__ int netiucv_test_and_set_busy(struct net_device *dev) | |
168 | { | |
169 | netif_stop_queue(dev); | |
170 | return test_and_set_bit(0, &((struct netiucv_priv *)dev->priv)->tbusy); | |
171 | } | |
172 | ||
173 | static __u8 iucv_host[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; | |
174 | static __u8 iucvMagic[16] = { | |
175 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, | |
176 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40 | |
177 | }; | |
178 | ||
179 | /** | |
180 | * This mask means the 16-byte IUCV "magic" and the origin userid must | |
181 | * match exactly as specified in order to give connection_pending() | |
182 | * control. | |
183 | */ | |
184 | static __u8 netiucv_mask[] = { | |
185 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
186 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
187 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff | |
188 | }; | |
189 | ||
190 | /** | |
191 | * Convert an iucv userId to its printable | |
192 | * form (strip whitespace at end). | |
193 | * | |
194 | * @param An iucv userId | |
195 | * | |
196 | * @returns The printable string (static data!!) | |
197 | */ | |
198 | static __inline__ char * | |
199 | netiucv_printname(char *name) | |
200 | { | |
201 | static char tmp[9]; | |
202 | char *p = tmp; | |
203 | memcpy(tmp, name, 8); | |
204 | tmp[8] = '\0'; | |
205 | while (*p && (!isspace(*p))) | |
206 | p++; | |
207 | *p = '\0'; | |
208 | return tmp; | |
209 | } | |
e82b0f2c | 210 | |
1da177e4 LT |
211 | /** |
212 | * States of the interface statemachine. | |
213 | */ | |
214 | enum dev_states { | |
215 | DEV_STATE_STOPPED, | |
216 | DEV_STATE_STARTWAIT, | |
217 | DEV_STATE_STOPWAIT, | |
218 | DEV_STATE_RUNNING, | |
219 | /** | |
220 | * MUST be always the last element!! | |
221 | */ | |
222 | NR_DEV_STATES | |
223 | }; | |
224 | ||
225 | static const char *dev_state_names[] = { | |
226 | "Stopped", | |
227 | "StartWait", | |
228 | "StopWait", | |
229 | "Running", | |
230 | }; | |
231 | ||
232 | /** | |
233 | * Events of the interface statemachine. | |
234 | */ | |
235 | enum dev_events { | |
236 | DEV_EVENT_START, | |
237 | DEV_EVENT_STOP, | |
238 | DEV_EVENT_CONUP, | |
239 | DEV_EVENT_CONDOWN, | |
240 | /** | |
241 | * MUST be always the last element!! | |
242 | */ | |
243 | NR_DEV_EVENTS | |
244 | }; | |
245 | ||
246 | static const char *dev_event_names[] = { | |
247 | "Start", | |
248 | "Stop", | |
249 | "Connection up", | |
250 | "Connection down", | |
251 | }; | |
e82b0f2c | 252 | |
1da177e4 LT |
253 | /** |
254 | * Events of the connection statemachine | |
255 | */ | |
256 | enum conn_events { | |
257 | /** | |
258 | * Events, representing callbacks from | |
259 | * lowlevel iucv layer) | |
260 | */ | |
261 | CONN_EVENT_CONN_REQ, | |
262 | CONN_EVENT_CONN_ACK, | |
263 | CONN_EVENT_CONN_REJ, | |
264 | CONN_EVENT_CONN_SUS, | |
265 | CONN_EVENT_CONN_RES, | |
266 | CONN_EVENT_RX, | |
267 | CONN_EVENT_TXDONE, | |
268 | ||
269 | /** | |
270 | * Events, representing errors return codes from | |
271 | * calls to lowlevel iucv layer | |
272 | */ | |
273 | ||
274 | /** | |
275 | * Event, representing timer expiry. | |
276 | */ | |
277 | CONN_EVENT_TIMER, | |
278 | ||
279 | /** | |
280 | * Events, representing commands from upper levels. | |
281 | */ | |
282 | CONN_EVENT_START, | |
283 | CONN_EVENT_STOP, | |
284 | ||
285 | /** | |
286 | * MUST be always the last element!! | |
287 | */ | |
288 | NR_CONN_EVENTS, | |
289 | }; | |
290 | ||
291 | static const char *conn_event_names[] = { | |
292 | "Remote connection request", | |
293 | "Remote connection acknowledge", | |
294 | "Remote connection reject", | |
295 | "Connection suspended", | |
296 | "Connection resumed", | |
297 | "Data received", | |
298 | "Data sent", | |
299 | ||
300 | "Timer", | |
301 | ||
302 | "Start", | |
303 | "Stop", | |
304 | }; | |
305 | ||
306 | /** | |
307 | * States of the connection statemachine. | |
308 | */ | |
309 | enum conn_states { | |
310 | /** | |
311 | * Connection not assigned to any device, | |
312 | * initial state, invalid | |
313 | */ | |
314 | CONN_STATE_INVALID, | |
315 | ||
316 | /** | |
317 | * Userid assigned but not operating | |
318 | */ | |
319 | CONN_STATE_STOPPED, | |
320 | ||
321 | /** | |
322 | * Connection registered, | |
323 | * no connection request sent yet, | |
324 | * no connection request received | |
325 | */ | |
326 | CONN_STATE_STARTWAIT, | |
327 | ||
328 | /** | |
329 | * Connection registered and connection request sent, | |
330 | * no acknowledge and no connection request received yet. | |
331 | */ | |
332 | CONN_STATE_SETUPWAIT, | |
333 | ||
334 | /** | |
335 | * Connection up and running idle | |
336 | */ | |
337 | CONN_STATE_IDLE, | |
338 | ||
339 | /** | |
340 | * Data sent, awaiting CONN_EVENT_TXDONE | |
341 | */ | |
342 | CONN_STATE_TX, | |
343 | ||
344 | /** | |
345 | * Error during registration. | |
346 | */ | |
347 | CONN_STATE_REGERR, | |
348 | ||
349 | /** | |
350 | * Error during registration. | |
351 | */ | |
352 | CONN_STATE_CONNERR, | |
353 | ||
354 | /** | |
355 | * MUST be always the last element!! | |
356 | */ | |
357 | NR_CONN_STATES, | |
358 | }; | |
359 | ||
360 | static const char *conn_state_names[] = { | |
361 | "Invalid", | |
362 | "Stopped", | |
363 | "StartWait", | |
364 | "SetupWait", | |
365 | "Idle", | |
366 | "TX", | |
367 | "Terminating", | |
368 | "Registration error", | |
369 | "Connect error", | |
370 | }; | |
371 | ||
e82b0f2c | 372 | |
1da177e4 LT |
373 | /** |
374 | * Debug Facility Stuff | |
375 | */ | |
376 | static debug_info_t *iucv_dbf_setup = NULL; | |
377 | static debug_info_t *iucv_dbf_data = NULL; | |
378 | static debug_info_t *iucv_dbf_trace = NULL; | |
379 | ||
380 | DEFINE_PER_CPU(char[256], iucv_dbf_txt_buf); | |
381 | ||
382 | static void | |
383 | iucv_unregister_dbf_views(void) | |
384 | { | |
385 | if (iucv_dbf_setup) | |
386 | debug_unregister(iucv_dbf_setup); | |
387 | if (iucv_dbf_data) | |
388 | debug_unregister(iucv_dbf_data); | |
389 | if (iucv_dbf_trace) | |
390 | debug_unregister(iucv_dbf_trace); | |
391 | } | |
392 | static int | |
393 | iucv_register_dbf_views(void) | |
394 | { | |
395 | iucv_dbf_setup = debug_register(IUCV_DBF_SETUP_NAME, | |
66a464db | 396 | IUCV_DBF_SETUP_PAGES, |
1da177e4 LT |
397 | IUCV_DBF_SETUP_NR_AREAS, |
398 | IUCV_DBF_SETUP_LEN); | |
399 | iucv_dbf_data = debug_register(IUCV_DBF_DATA_NAME, | |
66a464db | 400 | IUCV_DBF_DATA_PAGES, |
1da177e4 LT |
401 | IUCV_DBF_DATA_NR_AREAS, |
402 | IUCV_DBF_DATA_LEN); | |
403 | iucv_dbf_trace = debug_register(IUCV_DBF_TRACE_NAME, | |
66a464db | 404 | IUCV_DBF_TRACE_PAGES, |
1da177e4 LT |
405 | IUCV_DBF_TRACE_NR_AREAS, |
406 | IUCV_DBF_TRACE_LEN); | |
407 | ||
408 | if ((iucv_dbf_setup == NULL) || (iucv_dbf_data == NULL) || | |
409 | (iucv_dbf_trace == NULL)) { | |
410 | iucv_unregister_dbf_views(); | |
411 | return -ENOMEM; | |
412 | } | |
413 | debug_register_view(iucv_dbf_setup, &debug_hex_ascii_view); | |
414 | debug_set_level(iucv_dbf_setup, IUCV_DBF_SETUP_LEVEL); | |
415 | ||
416 | debug_register_view(iucv_dbf_data, &debug_hex_ascii_view); | |
417 | debug_set_level(iucv_dbf_data, IUCV_DBF_DATA_LEVEL); | |
418 | ||
419 | debug_register_view(iucv_dbf_trace, &debug_hex_ascii_view); | |
420 | debug_set_level(iucv_dbf_trace, IUCV_DBF_TRACE_LEVEL); | |
421 | ||
422 | return 0; | |
423 | } | |
424 | ||
425 | /** | |
426 | * Callback-wrappers, called from lowlevel iucv layer. | |
427 | *****************************************************************************/ | |
428 | ||
429 | static void | |
430 | netiucv_callback_rx(iucv_MessagePending *eib, void *pgm_data) | |
431 | { | |
432 | struct iucv_connection *conn = (struct iucv_connection *)pgm_data; | |
433 | struct iucv_event ev; | |
434 | ||
435 | ev.conn = conn; | |
436 | ev.data = (void *)eib; | |
437 | ||
438 | fsm_event(conn->fsm, CONN_EVENT_RX, &ev); | |
439 | } | |
440 | ||
441 | static void | |
442 | netiucv_callback_txdone(iucv_MessageComplete *eib, void *pgm_data) | |
443 | { | |
444 | struct iucv_connection *conn = (struct iucv_connection *)pgm_data; | |
445 | struct iucv_event ev; | |
446 | ||
447 | ev.conn = conn; | |
448 | ev.data = (void *)eib; | |
449 | fsm_event(conn->fsm, CONN_EVENT_TXDONE, &ev); | |
450 | } | |
451 | ||
452 | static void | |
453 | netiucv_callback_connack(iucv_ConnectionComplete *eib, void *pgm_data) | |
454 | { | |
455 | struct iucv_connection *conn = (struct iucv_connection *)pgm_data; | |
456 | struct iucv_event ev; | |
457 | ||
458 | ev.conn = conn; | |
459 | ev.data = (void *)eib; | |
460 | fsm_event(conn->fsm, CONN_EVENT_CONN_ACK, &ev); | |
461 | } | |
462 | ||
463 | static void | |
464 | netiucv_callback_connreq(iucv_ConnectionPending *eib, void *pgm_data) | |
465 | { | |
466 | struct iucv_connection *conn = (struct iucv_connection *)pgm_data; | |
467 | struct iucv_event ev; | |
468 | ||
469 | ev.conn = conn; | |
470 | ev.data = (void *)eib; | |
471 | fsm_event(conn->fsm, CONN_EVENT_CONN_REQ, &ev); | |
472 | } | |
473 | ||
474 | static void | |
475 | netiucv_callback_connrej(iucv_ConnectionSevered *eib, void *pgm_data) | |
476 | { | |
477 | struct iucv_connection *conn = (struct iucv_connection *)pgm_data; | |
478 | struct iucv_event ev; | |
479 | ||
480 | ev.conn = conn; | |
481 | ev.data = (void *)eib; | |
482 | fsm_event(conn->fsm, CONN_EVENT_CONN_REJ, &ev); | |
483 | } | |
484 | ||
485 | static void | |
486 | netiucv_callback_connsusp(iucv_ConnectionQuiesced *eib, void *pgm_data) | |
487 | { | |
488 | struct iucv_connection *conn = (struct iucv_connection *)pgm_data; | |
489 | struct iucv_event ev; | |
490 | ||
491 | ev.conn = conn; | |
492 | ev.data = (void *)eib; | |
493 | fsm_event(conn->fsm, CONN_EVENT_CONN_SUS, &ev); | |
494 | } | |
495 | ||
496 | static void | |
497 | netiucv_callback_connres(iucv_ConnectionResumed *eib, void *pgm_data) | |
498 | { | |
499 | struct iucv_connection *conn = (struct iucv_connection *)pgm_data; | |
500 | struct iucv_event ev; | |
501 | ||
502 | ev.conn = conn; | |
503 | ev.data = (void *)eib; | |
504 | fsm_event(conn->fsm, CONN_EVENT_CONN_RES, &ev); | |
505 | } | |
506 | ||
507 | static iucv_interrupt_ops_t netiucv_ops = { | |
508 | .ConnectionPending = netiucv_callback_connreq, | |
509 | .ConnectionComplete = netiucv_callback_connack, | |
510 | .ConnectionSevered = netiucv_callback_connrej, | |
511 | .ConnectionQuiesced = netiucv_callback_connsusp, | |
512 | .ConnectionResumed = netiucv_callback_connres, | |
513 | .MessagePending = netiucv_callback_rx, | |
514 | .MessageComplete = netiucv_callback_txdone | |
515 | }; | |
516 | ||
517 | /** | |
518 | * Dummy NOP action for all statemachines | |
519 | */ | |
520 | static void | |
521 | fsm_action_nop(fsm_instance *fi, int event, void *arg) | |
522 | { | |
523 | } | |
e82b0f2c | 524 | |
1da177e4 LT |
525 | /** |
526 | * Actions of the connection statemachine | |
527 | *****************************************************************************/ | |
528 | ||
529 | /** | |
530 | * Helper function for conn_action_rx() | |
531 | * Unpack a just received skb and hand it over to | |
532 | * upper layers. | |
533 | * | |
534 | * @param conn The connection where this skb has been received. | |
535 | * @param pskb The received skb. | |
536 | */ | |
537 | //static __inline__ void | |
538 | static void | |
539 | netiucv_unpack_skb(struct iucv_connection *conn, struct sk_buff *pskb) | |
540 | { | |
541 | struct net_device *dev = conn->netdev; | |
542 | struct netiucv_priv *privptr = dev->priv; | |
543 | __u16 offset = 0; | |
544 | ||
545 | skb_put(pskb, NETIUCV_HDRLEN); | |
546 | pskb->dev = dev; | |
547 | pskb->ip_summed = CHECKSUM_NONE; | |
548 | pskb->protocol = ntohs(ETH_P_IP); | |
549 | ||
550 | while (1) { | |
551 | struct sk_buff *skb; | |
552 | ll_header *header = (ll_header *)pskb->data; | |
553 | ||
554 | if (!header->next) | |
555 | break; | |
556 | ||
557 | skb_pull(pskb, NETIUCV_HDRLEN); | |
558 | header->next -= offset; | |
559 | offset += header->next; | |
560 | header->next -= NETIUCV_HDRLEN; | |
561 | if (skb_tailroom(pskb) < header->next) { | |
562 | PRINT_WARN("%s: Illegal next field in iucv header: " | |
563 | "%d > %d\n", | |
564 | dev->name, header->next, skb_tailroom(pskb)); | |
565 | IUCV_DBF_TEXT_(data, 2, "Illegal next field: %d > %d\n", | |
566 | header->next, skb_tailroom(pskb)); | |
567 | return; | |
568 | } | |
569 | skb_put(pskb, header->next); | |
570 | pskb->mac.raw = pskb->data; | |
571 | skb = dev_alloc_skb(pskb->len); | |
572 | if (!skb) { | |
573 | PRINT_WARN("%s Out of memory in netiucv_unpack_skb\n", | |
574 | dev->name); | |
575 | IUCV_DBF_TEXT(data, 2, | |
576 | "Out of memory in netiucv_unpack_skb\n"); | |
577 | privptr->stats.rx_dropped++; | |
578 | return; | |
579 | } | |
580 | memcpy(skb_put(skb, pskb->len), pskb->data, pskb->len); | |
581 | skb->mac.raw = skb->data; | |
582 | skb->dev = pskb->dev; | |
583 | skb->protocol = pskb->protocol; | |
584 | pskb->ip_summed = CHECKSUM_UNNECESSARY; | |
585 | /* | |
586 | * Since receiving is always initiated from a tasklet (in iucv.c), | |
587 | * we must use netif_rx_ni() instead of netif_rx() | |
588 | */ | |
589 | netif_rx_ni(skb); | |
590 | dev->last_rx = jiffies; | |
591 | privptr->stats.rx_packets++; | |
592 | privptr->stats.rx_bytes += skb->len; | |
593 | skb_pull(pskb, header->next); | |
594 | skb_put(pskb, NETIUCV_HDRLEN); | |
595 | } | |
596 | } | |
597 | ||
598 | static void | |
599 | conn_action_rx(fsm_instance *fi, int event, void *arg) | |
600 | { | |
601 | struct iucv_event *ev = (struct iucv_event *)arg; | |
602 | struct iucv_connection *conn = ev->conn; | |
603 | iucv_MessagePending *eib = (iucv_MessagePending *)ev->data; | |
604 | struct netiucv_priv *privptr =(struct netiucv_priv *)conn->netdev->priv; | |
605 | ||
606 | __u32 msglen = eib->ln1msg2.ipbfln1f; | |
607 | int rc; | |
608 | ||
609 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); | |
610 | ||
611 | if (!conn->netdev) { | |
612 | /* FRITZ: How to tell iucv LL to drop the msg? */ | |
613 | PRINT_WARN("Received data for unlinked connection\n"); | |
614 | IUCV_DBF_TEXT(data, 2, | |
615 | "Received data for unlinked connection\n"); | |
616 | return; | |
617 | } | |
618 | if (msglen > conn->max_buffsize) { | |
619 | /* FRITZ: How to tell iucv LL to drop the msg? */ | |
620 | privptr->stats.rx_dropped++; | |
621 | PRINT_WARN("msglen %d > max_buffsize %d\n", | |
622 | msglen, conn->max_buffsize); | |
623 | IUCV_DBF_TEXT_(data, 2, "msglen %d > max_buffsize %d\n", | |
624 | msglen, conn->max_buffsize); | |
625 | return; | |
626 | } | |
627 | conn->rx_buff->data = conn->rx_buff->tail = conn->rx_buff->head; | |
628 | conn->rx_buff->len = 0; | |
629 | rc = iucv_receive(conn->pathid, eib->ipmsgid, eib->iptrgcls, | |
630 | conn->rx_buff->data, msglen, NULL, NULL, NULL); | |
631 | if (rc || msglen < 5) { | |
632 | privptr->stats.rx_errors++; | |
633 | PRINT_WARN("iucv_receive returned %08x\n", rc); | |
634 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_receive\n", rc); | |
635 | return; | |
636 | } | |
637 | netiucv_unpack_skb(conn, conn->rx_buff); | |
638 | } | |
639 | ||
640 | static void | |
641 | conn_action_txdone(fsm_instance *fi, int event, void *arg) | |
642 | { | |
643 | struct iucv_event *ev = (struct iucv_event *)arg; | |
644 | struct iucv_connection *conn = ev->conn; | |
645 | iucv_MessageComplete *eib = (iucv_MessageComplete *)ev->data; | |
646 | struct netiucv_priv *privptr = NULL; | |
647 | /* Shut up, gcc! skb is always below 2G. */ | |
648 | __u32 single_flag = eib->ipmsgtag; | |
649 | __u32 txbytes = 0; | |
650 | __u32 txpackets = 0; | |
651 | __u32 stat_maxcq = 0; | |
652 | struct sk_buff *skb; | |
653 | unsigned long saveflags; | |
654 | ll_header header; | |
655 | ||
656 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); | |
657 | ||
658 | if (conn && conn->netdev && conn->netdev->priv) | |
659 | privptr = (struct netiucv_priv *)conn->netdev->priv; | |
660 | conn->prof.tx_pending--; | |
661 | if (single_flag) { | |
662 | if ((skb = skb_dequeue(&conn->commit_queue))) { | |
663 | atomic_dec(&skb->users); | |
664 | dev_kfree_skb_any(skb); | |
665 | if (privptr) { | |
666 | privptr->stats.tx_packets++; | |
667 | privptr->stats.tx_bytes += | |
668 | (skb->len - NETIUCV_HDRLEN | |
669 | - NETIUCV_HDRLEN); | |
670 | } | |
671 | } | |
672 | } | |
673 | conn->tx_buff->data = conn->tx_buff->tail = conn->tx_buff->head; | |
674 | conn->tx_buff->len = 0; | |
675 | spin_lock_irqsave(&conn->collect_lock, saveflags); | |
676 | while ((skb = skb_dequeue(&conn->collect_queue))) { | |
677 | header.next = conn->tx_buff->len + skb->len + NETIUCV_HDRLEN; | |
678 | memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, | |
679 | NETIUCV_HDRLEN); | |
680 | memcpy(skb_put(conn->tx_buff, skb->len), skb->data, skb->len); | |
681 | txbytes += skb->len; | |
682 | txpackets++; | |
683 | stat_maxcq++; | |
684 | atomic_dec(&skb->users); | |
685 | dev_kfree_skb_any(skb); | |
686 | } | |
687 | if (conn->collect_len > conn->prof.maxmulti) | |
688 | conn->prof.maxmulti = conn->collect_len; | |
689 | conn->collect_len = 0; | |
690 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); | |
691 | if (conn->tx_buff->len) { | |
692 | int rc; | |
693 | ||
694 | header.next = 0; | |
695 | memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, | |
696 | NETIUCV_HDRLEN); | |
697 | ||
698 | conn->prof.send_stamp = xtime; | |
699 | rc = iucv_send(conn->pathid, NULL, 0, 0, 0, 0, | |
700 | conn->tx_buff->data, conn->tx_buff->len); | |
701 | conn->prof.doios_multi++; | |
702 | conn->prof.txlen += conn->tx_buff->len; | |
703 | conn->prof.tx_pending++; | |
704 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) | |
705 | conn->prof.tx_max_pending = conn->prof.tx_pending; | |
706 | if (rc) { | |
707 | conn->prof.tx_pending--; | |
708 | fsm_newstate(fi, CONN_STATE_IDLE); | |
709 | if (privptr) | |
710 | privptr->stats.tx_errors += txpackets; | |
711 | PRINT_WARN("iucv_send returned %08x\n", rc); | |
712 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); | |
713 | } else { | |
714 | if (privptr) { | |
715 | privptr->stats.tx_packets += txpackets; | |
716 | privptr->stats.tx_bytes += txbytes; | |
717 | } | |
718 | if (stat_maxcq > conn->prof.maxcqueue) | |
719 | conn->prof.maxcqueue = stat_maxcq; | |
720 | } | |
721 | } else | |
722 | fsm_newstate(fi, CONN_STATE_IDLE); | |
723 | } | |
724 | ||
725 | static void | |
726 | conn_action_connaccept(fsm_instance *fi, int event, void *arg) | |
727 | { | |
728 | struct iucv_event *ev = (struct iucv_event *)arg; | |
729 | struct iucv_connection *conn = ev->conn; | |
730 | iucv_ConnectionPending *eib = (iucv_ConnectionPending *)ev->data; | |
731 | struct net_device *netdev = conn->netdev; | |
732 | struct netiucv_priv *privptr = (struct netiucv_priv *)netdev->priv; | |
733 | int rc; | |
734 | __u16 msglimit; | |
735 | __u8 udata[16]; | |
736 | ||
737 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
738 | ||
739 | rc = iucv_accept(eib->ippathid, NETIUCV_QUEUELEN_DEFAULT, udata, 0, | |
740 | conn->handle, conn, NULL, &msglimit); | |
741 | if (rc) { | |
742 | PRINT_WARN("%s: IUCV accept failed with error %d\n", | |
743 | netdev->name, rc); | |
744 | IUCV_DBF_TEXT_(setup, 2, "rc %d from iucv_accept", rc); | |
745 | return; | |
746 | } | |
747 | fsm_newstate(fi, CONN_STATE_IDLE); | |
748 | conn->pathid = eib->ippathid; | |
749 | netdev->tx_queue_len = msglimit; | |
750 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); | |
751 | } | |
752 | ||
753 | static void | |
754 | conn_action_connreject(fsm_instance *fi, int event, void *arg) | |
755 | { | |
756 | struct iucv_event *ev = (struct iucv_event *)arg; | |
757 | struct iucv_connection *conn = ev->conn; | |
758 | struct net_device *netdev = conn->netdev; | |
759 | iucv_ConnectionPending *eib = (iucv_ConnectionPending *)ev->data; | |
760 | __u8 udata[16]; | |
761 | ||
762 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
763 | ||
764 | iucv_sever(eib->ippathid, udata); | |
765 | if (eib->ippathid != conn->pathid) { | |
766 | PRINT_INFO("%s: IR Connection Pending; " | |
767 | "pathid %d does not match original pathid %d\n", | |
768 | netdev->name, eib->ippathid, conn->pathid); | |
769 | IUCV_DBF_TEXT_(data, 2, | |
770 | "connreject: IR pathid %d, conn. pathid %d\n", | |
771 | eib->ippathid, conn->pathid); | |
772 | iucv_sever(conn->pathid, udata); | |
773 | } | |
774 | } | |
775 | ||
776 | static void | |
777 | conn_action_connack(fsm_instance *fi, int event, void *arg) | |
778 | { | |
779 | struct iucv_event *ev = (struct iucv_event *)arg; | |
780 | struct iucv_connection *conn = ev->conn; | |
781 | iucv_ConnectionComplete *eib = (iucv_ConnectionComplete *)ev->data; | |
782 | struct net_device *netdev = conn->netdev; | |
783 | struct netiucv_priv *privptr = (struct netiucv_priv *)netdev->priv; | |
784 | ||
785 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
786 | ||
787 | fsm_deltimer(&conn->timer); | |
788 | fsm_newstate(fi, CONN_STATE_IDLE); | |
789 | if (eib->ippathid != conn->pathid) { | |
790 | PRINT_INFO("%s: IR Connection Complete; " | |
791 | "pathid %d does not match original pathid %d\n", | |
792 | netdev->name, eib->ippathid, conn->pathid); | |
793 | IUCV_DBF_TEXT_(data, 2, | |
794 | "connack: IR pathid %d, conn. pathid %d\n", | |
795 | eib->ippathid, conn->pathid); | |
796 | conn->pathid = eib->ippathid; | |
797 | } | |
798 | netdev->tx_queue_len = eib->ipmsglim; | |
799 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); | |
800 | } | |
801 | ||
802 | static void | |
803 | conn_action_conntimsev(fsm_instance *fi, int event, void *arg) | |
804 | { | |
805 | struct iucv_connection *conn = (struct iucv_connection *)arg; | |
806 | __u8 udata[16]; | |
807 | ||
808 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
809 | ||
810 | fsm_deltimer(&conn->timer); | |
811 | iucv_sever(conn->pathid, udata); | |
812 | fsm_newstate(fi, CONN_STATE_STARTWAIT); | |
813 | } | |
814 | ||
815 | static void | |
816 | conn_action_connsever(fsm_instance *fi, int event, void *arg) | |
817 | { | |
818 | struct iucv_event *ev = (struct iucv_event *)arg; | |
819 | struct iucv_connection *conn = ev->conn; | |
820 | struct net_device *netdev = conn->netdev; | |
821 | struct netiucv_priv *privptr = (struct netiucv_priv *)netdev->priv; | |
822 | __u8 udata[16]; | |
823 | ||
824 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
825 | ||
826 | fsm_deltimer(&conn->timer); | |
827 | iucv_sever(conn->pathid, udata); | |
828 | PRINT_INFO("%s: Remote dropped connection\n", netdev->name); | |
829 | IUCV_DBF_TEXT(data, 2, | |
830 | "conn_action_connsever: Remote dropped connection\n"); | |
831 | fsm_newstate(fi, CONN_STATE_STARTWAIT); | |
832 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); | |
833 | } | |
834 | ||
835 | static void | |
836 | conn_action_start(fsm_instance *fi, int event, void *arg) | |
837 | { | |
838 | struct iucv_event *ev = (struct iucv_event *)arg; | |
839 | struct iucv_connection *conn = ev->conn; | |
840 | __u16 msglimit; | |
841 | int rc; | |
842 | ||
843 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
844 | ||
845 | if (!conn->handle) { | |
846 | IUCV_DBF_TEXT(trace, 5, "calling iucv_register_program\n"); | |
847 | conn->handle = | |
848 | iucv_register_program(iucvMagic, conn->userid, | |
849 | netiucv_mask, | |
850 | &netiucv_ops, conn); | |
851 | fsm_newstate(fi, CONN_STATE_STARTWAIT); | |
852 | if (!conn->handle) { | |
853 | fsm_newstate(fi, CONN_STATE_REGERR); | |
854 | conn->handle = NULL; | |
855 | IUCV_DBF_TEXT(setup, 2, | |
856 | "NULL from iucv_register_program\n"); | |
857 | return; | |
858 | } | |
859 | ||
860 | PRINT_DEBUG("%s('%s'): registered successfully\n", | |
861 | conn->netdev->name, conn->userid); | |
862 | } | |
863 | ||
864 | PRINT_DEBUG("%s('%s'): connecting ...\n", | |
865 | conn->netdev->name, conn->userid); | |
866 | ||
867 | /* We must set the state before calling iucv_connect because the callback | |
868 | * handler could be called at any point after the connection request is | |
869 | * sent */ | |
870 | ||
871 | fsm_newstate(fi, CONN_STATE_SETUPWAIT); | |
872 | rc = iucv_connect(&(conn->pathid), NETIUCV_QUEUELEN_DEFAULT, iucvMagic, | |
873 | conn->userid, iucv_host, 0, NULL, &msglimit, | |
874 | conn->handle, conn); | |
875 | switch (rc) { | |
876 | case 0: | |
877 | conn->netdev->tx_queue_len = msglimit; | |
878 | fsm_addtimer(&conn->timer, NETIUCV_TIMEOUT_5SEC, | |
879 | CONN_EVENT_TIMER, conn); | |
880 | return; | |
881 | case 11: | |
882 | PRINT_INFO("%s: User %s is currently not available.\n", | |
883 | conn->netdev->name, | |
884 | netiucv_printname(conn->userid)); | |
885 | fsm_newstate(fi, CONN_STATE_STARTWAIT); | |
886 | return; | |
887 | case 12: | |
888 | PRINT_INFO("%s: User %s is currently not ready.\n", | |
889 | conn->netdev->name, | |
890 | netiucv_printname(conn->userid)); | |
891 | fsm_newstate(fi, CONN_STATE_STARTWAIT); | |
892 | return; | |
893 | case 13: | |
894 | PRINT_WARN("%s: Too many IUCV connections.\n", | |
895 | conn->netdev->name); | |
896 | fsm_newstate(fi, CONN_STATE_CONNERR); | |
897 | break; | |
898 | case 14: | |
899 | PRINT_WARN( | |
900 | "%s: User %s has too many IUCV connections.\n", | |
901 | conn->netdev->name, | |
902 | netiucv_printname(conn->userid)); | |
903 | fsm_newstate(fi, CONN_STATE_CONNERR); | |
904 | break; | |
905 | case 15: | |
906 | PRINT_WARN( | |
907 | "%s: No IUCV authorization in CP directory.\n", | |
908 | conn->netdev->name); | |
909 | fsm_newstate(fi, CONN_STATE_CONNERR); | |
910 | break; | |
911 | default: | |
912 | PRINT_WARN("%s: iucv_connect returned error %d\n", | |
913 | conn->netdev->name, rc); | |
914 | fsm_newstate(fi, CONN_STATE_CONNERR); | |
915 | break; | |
916 | } | |
917 | IUCV_DBF_TEXT_(setup, 5, "iucv_connect rc is %d\n", rc); | |
918 | IUCV_DBF_TEXT(trace, 5, "calling iucv_unregister_program\n"); | |
919 | iucv_unregister_program(conn->handle); | |
920 | conn->handle = NULL; | |
921 | } | |
922 | ||
923 | static void | |
924 | netiucv_purge_skb_queue(struct sk_buff_head *q) | |
925 | { | |
926 | struct sk_buff *skb; | |
927 | ||
928 | while ((skb = skb_dequeue(q))) { | |
929 | atomic_dec(&skb->users); | |
930 | dev_kfree_skb_any(skb); | |
931 | } | |
932 | } | |
933 | ||
934 | static void | |
935 | conn_action_stop(fsm_instance *fi, int event, void *arg) | |
936 | { | |
937 | struct iucv_event *ev = (struct iucv_event *)arg; | |
938 | struct iucv_connection *conn = ev->conn; | |
939 | struct net_device *netdev = conn->netdev; | |
940 | struct netiucv_priv *privptr = (struct netiucv_priv *)netdev->priv; | |
941 | ||
942 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
943 | ||
944 | fsm_deltimer(&conn->timer); | |
945 | fsm_newstate(fi, CONN_STATE_STOPPED); | |
946 | netiucv_purge_skb_queue(&conn->collect_queue); | |
947 | if (conn->handle) | |
948 | IUCV_DBF_TEXT(trace, 5, "calling iucv_unregister_program\n"); | |
949 | iucv_unregister_program(conn->handle); | |
950 | conn->handle = NULL; | |
951 | netiucv_purge_skb_queue(&conn->commit_queue); | |
952 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); | |
953 | } | |
954 | ||
955 | static void | |
956 | conn_action_inval(fsm_instance *fi, int event, void *arg) | |
957 | { | |
958 | struct iucv_event *ev = (struct iucv_event *)arg; | |
959 | struct iucv_connection *conn = ev->conn; | |
960 | struct net_device *netdev = conn->netdev; | |
961 | ||
962 | PRINT_WARN("%s: Cannot connect without username\n", | |
963 | netdev->name); | |
964 | IUCV_DBF_TEXT(data, 2, "conn_action_inval called\n"); | |
965 | } | |
966 | ||
967 | static const fsm_node conn_fsm[] = { | |
968 | { CONN_STATE_INVALID, CONN_EVENT_START, conn_action_inval }, | |
969 | { CONN_STATE_STOPPED, CONN_EVENT_START, conn_action_start }, | |
970 | ||
971 | { CONN_STATE_STOPPED, CONN_EVENT_STOP, conn_action_stop }, | |
972 | { CONN_STATE_STARTWAIT, CONN_EVENT_STOP, conn_action_stop }, | |
973 | { CONN_STATE_SETUPWAIT, CONN_EVENT_STOP, conn_action_stop }, | |
974 | { CONN_STATE_IDLE, CONN_EVENT_STOP, conn_action_stop }, | |
975 | { CONN_STATE_TX, CONN_EVENT_STOP, conn_action_stop }, | |
976 | { CONN_STATE_REGERR, CONN_EVENT_STOP, conn_action_stop }, | |
977 | { CONN_STATE_CONNERR, CONN_EVENT_STOP, conn_action_stop }, | |
978 | ||
979 | { CONN_STATE_STOPPED, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
980 | { CONN_STATE_STARTWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, | |
981 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, | |
982 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
983 | { CONN_STATE_TX, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
984 | ||
985 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_ACK, conn_action_connack }, | |
986 | { CONN_STATE_SETUPWAIT, CONN_EVENT_TIMER, conn_action_conntimsev }, | |
987 | ||
988 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
989 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
990 | { CONN_STATE_TX, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
991 | ||
992 | { CONN_STATE_IDLE, CONN_EVENT_RX, conn_action_rx }, | |
993 | { CONN_STATE_TX, CONN_EVENT_RX, conn_action_rx }, | |
994 | ||
995 | { CONN_STATE_TX, CONN_EVENT_TXDONE, conn_action_txdone }, | |
996 | { CONN_STATE_IDLE, CONN_EVENT_TXDONE, conn_action_txdone }, | |
997 | }; | |
998 | ||
999 | static const int CONN_FSM_LEN = sizeof(conn_fsm) / sizeof(fsm_node); | |
1000 | ||
e82b0f2c | 1001 | |
1da177e4 LT |
1002 | /** |
1003 | * Actions for interface - statemachine. | |
1004 | *****************************************************************************/ | |
1005 | ||
1006 | /** | |
1007 | * Startup connection by sending CONN_EVENT_START to it. | |
1008 | * | |
1009 | * @param fi An instance of an interface statemachine. | |
1010 | * @param event The event, just happened. | |
1011 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1012 | */ | |
1013 | static void | |
1014 | dev_action_start(fsm_instance *fi, int event, void *arg) | |
1015 | { | |
1016 | struct net_device *dev = (struct net_device *)arg; | |
1017 | struct netiucv_priv *privptr = dev->priv; | |
1018 | struct iucv_event ev; | |
1019 | ||
1020 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1021 | ||
1022 | ev.conn = privptr->conn; | |
1023 | fsm_newstate(fi, DEV_STATE_STARTWAIT); | |
1024 | fsm_event(privptr->conn->fsm, CONN_EVENT_START, &ev); | |
1025 | } | |
1026 | ||
1027 | /** | |
1028 | * Shutdown connection by sending CONN_EVENT_STOP to it. | |
1029 | * | |
1030 | * @param fi An instance of an interface statemachine. | |
1031 | * @param event The event, just happened. | |
1032 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1033 | */ | |
1034 | static void | |
1035 | dev_action_stop(fsm_instance *fi, int event, void *arg) | |
1036 | { | |
1037 | struct net_device *dev = (struct net_device *)arg; | |
1038 | struct netiucv_priv *privptr = dev->priv; | |
1039 | struct iucv_event ev; | |
1040 | ||
1041 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1042 | ||
1043 | ev.conn = privptr->conn; | |
1044 | ||
1045 | fsm_newstate(fi, DEV_STATE_STOPWAIT); | |
1046 | fsm_event(privptr->conn->fsm, CONN_EVENT_STOP, &ev); | |
1047 | } | |
1048 | ||
1049 | /** | |
1050 | * Called from connection statemachine | |
1051 | * when a connection is up and running. | |
1052 | * | |
1053 | * @param fi An instance of an interface statemachine. | |
1054 | * @param event The event, just happened. | |
1055 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1056 | */ | |
1057 | static void | |
1058 | dev_action_connup(fsm_instance *fi, int event, void *arg) | |
1059 | { | |
1060 | struct net_device *dev = (struct net_device *)arg; | |
1061 | struct netiucv_priv *privptr = dev->priv; | |
1062 | ||
1063 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1064 | ||
1065 | switch (fsm_getstate(fi)) { | |
1066 | case DEV_STATE_STARTWAIT: | |
1067 | fsm_newstate(fi, DEV_STATE_RUNNING); | |
1068 | PRINT_INFO("%s: connected with remote side %s\n", | |
1069 | dev->name, privptr->conn->userid); | |
1070 | IUCV_DBF_TEXT(setup, 3, | |
1071 | "connection is up and running\n"); | |
1072 | break; | |
1073 | case DEV_STATE_STOPWAIT: | |
1074 | PRINT_INFO( | |
1075 | "%s: got connection UP event during shutdown!\n", | |
1076 | dev->name); | |
1077 | IUCV_DBF_TEXT(data, 2, | |
1078 | "dev_action_connup: in DEV_STATE_STOPWAIT\n"); | |
1079 | break; | |
1080 | } | |
1081 | } | |
1082 | ||
1083 | /** | |
1084 | * Called from connection statemachine | |
1085 | * when a connection has been shutdown. | |
1086 | * | |
1087 | * @param fi An instance of an interface statemachine. | |
1088 | * @param event The event, just happened. | |
1089 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1090 | */ | |
1091 | static void | |
1092 | dev_action_conndown(fsm_instance *fi, int event, void *arg) | |
1093 | { | |
1094 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1095 | ||
1096 | switch (fsm_getstate(fi)) { | |
1097 | case DEV_STATE_RUNNING: | |
1098 | fsm_newstate(fi, DEV_STATE_STARTWAIT); | |
1099 | break; | |
1100 | case DEV_STATE_STOPWAIT: | |
1101 | fsm_newstate(fi, DEV_STATE_STOPPED); | |
1102 | IUCV_DBF_TEXT(setup, 3, "connection is down\n"); | |
1103 | break; | |
1104 | } | |
1105 | } | |
1106 | ||
1107 | static const fsm_node dev_fsm[] = { | |
1108 | { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start }, | |
1109 | ||
1110 | { DEV_STATE_STOPWAIT, DEV_EVENT_START, dev_action_start }, | |
1111 | { DEV_STATE_STOPWAIT, DEV_EVENT_CONDOWN, dev_action_conndown }, | |
1112 | ||
1113 | { DEV_STATE_STARTWAIT, DEV_EVENT_STOP, dev_action_stop }, | |
1114 | { DEV_STATE_STARTWAIT, DEV_EVENT_CONUP, dev_action_connup }, | |
1115 | ||
1116 | { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop }, | |
1117 | { DEV_STATE_RUNNING, DEV_EVENT_CONDOWN, dev_action_conndown }, | |
1118 | { DEV_STATE_RUNNING, DEV_EVENT_CONUP, fsm_action_nop }, | |
1119 | }; | |
1120 | ||
1121 | static const int DEV_FSM_LEN = sizeof(dev_fsm) / sizeof(fsm_node); | |
1122 | ||
1123 | /** | |
1124 | * Transmit a packet. | |
1125 | * This is a helper function for netiucv_tx(). | |
1126 | * | |
1127 | * @param conn Connection to be used for sending. | |
1128 | * @param skb Pointer to struct sk_buff of packet to send. | |
1129 | * The linklevel header has already been set up | |
1130 | * by netiucv_tx(). | |
1131 | * | |
1132 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1133 | */ | |
1134 | static int | |
1135 | netiucv_transmit_skb(struct iucv_connection *conn, struct sk_buff *skb) { | |
1136 | unsigned long saveflags; | |
1137 | ll_header header; | |
1138 | int rc = 0; | |
1139 | ||
1140 | if (fsm_getstate(conn->fsm) != CONN_STATE_IDLE) { | |
1141 | int l = skb->len + NETIUCV_HDRLEN; | |
1142 | ||
1143 | spin_lock_irqsave(&conn->collect_lock, saveflags); | |
1144 | if (conn->collect_len + l > | |
1145 | (conn->max_buffsize - NETIUCV_HDRLEN)) { | |
1146 | rc = -EBUSY; | |
1147 | IUCV_DBF_TEXT(data, 2, | |
1148 | "EBUSY from netiucv_transmit_skb\n"); | |
1149 | } else { | |
1150 | atomic_inc(&skb->users); | |
1151 | skb_queue_tail(&conn->collect_queue, skb); | |
1152 | conn->collect_len += l; | |
1153 | } | |
1154 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); | |
1155 | } else { | |
1156 | struct sk_buff *nskb = skb; | |
1157 | /** | |
1158 | * Copy the skb to a new allocated skb in lowmem only if the | |
1159 | * data is located above 2G in memory or tailroom is < 2. | |
1160 | */ | |
1161 | unsigned long hi = | |
1162 | ((unsigned long)(skb->tail + NETIUCV_HDRLEN)) >> 31; | |
1163 | int copied = 0; | |
1164 | if (hi || (skb_tailroom(skb) < 2)) { | |
1165 | nskb = alloc_skb(skb->len + NETIUCV_HDRLEN + | |
1166 | NETIUCV_HDRLEN, GFP_ATOMIC | GFP_DMA); | |
1167 | if (!nskb) { | |
1168 | PRINT_WARN("%s: Could not allocate tx_skb\n", | |
1169 | conn->netdev->name); | |
1170 | IUCV_DBF_TEXT(data, 2, "alloc_skb failed\n"); | |
1171 | rc = -ENOMEM; | |
1172 | return rc; | |
1173 | } else { | |
1174 | skb_reserve(nskb, NETIUCV_HDRLEN); | |
1175 | memcpy(skb_put(nskb, skb->len), | |
1176 | skb->data, skb->len); | |
1177 | } | |
1178 | copied = 1; | |
1179 | } | |
1180 | /** | |
1181 | * skb now is below 2G and has enough room. Add headers. | |
1182 | */ | |
1183 | header.next = nskb->len + NETIUCV_HDRLEN; | |
1184 | memcpy(skb_push(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
1185 | header.next = 0; | |
1186 | memcpy(skb_put(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
1187 | ||
1188 | fsm_newstate(conn->fsm, CONN_STATE_TX); | |
1189 | conn->prof.send_stamp = xtime; | |
e82b0f2c | 1190 | |
1da177e4 LT |
1191 | rc = iucv_send(conn->pathid, NULL, 0, 0, 1 /* single_flag */, |
1192 | 0, nskb->data, nskb->len); | |
1193 | /* Shut up, gcc! nskb is always below 2G. */ | |
1194 | conn->prof.doios_single++; | |
1195 | conn->prof.txlen += skb->len; | |
1196 | conn->prof.tx_pending++; | |
1197 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) | |
1198 | conn->prof.tx_max_pending = conn->prof.tx_pending; | |
1199 | if (rc) { | |
1200 | struct netiucv_priv *privptr; | |
1201 | fsm_newstate(conn->fsm, CONN_STATE_IDLE); | |
1202 | conn->prof.tx_pending--; | |
1203 | privptr = (struct netiucv_priv *)conn->netdev->priv; | |
1204 | if (privptr) | |
1205 | privptr->stats.tx_errors++; | |
1206 | if (copied) | |
1207 | dev_kfree_skb(nskb); | |
1208 | else { | |
1209 | /** | |
1210 | * Remove our headers. They get added | |
1211 | * again on retransmit. | |
1212 | */ | |
1213 | skb_pull(skb, NETIUCV_HDRLEN); | |
1214 | skb_trim(skb, skb->len - NETIUCV_HDRLEN); | |
1215 | } | |
1216 | PRINT_WARN("iucv_send returned %08x\n", rc); | |
1217 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); | |
1218 | } else { | |
1219 | if (copied) | |
1220 | dev_kfree_skb(skb); | |
1221 | atomic_inc(&nskb->users); | |
1222 | skb_queue_tail(&conn->commit_queue, nskb); | |
1223 | } | |
1224 | } | |
1225 | ||
1226 | return rc; | |
1227 | } | |
e82b0f2c | 1228 | |
1da177e4 LT |
1229 | /** |
1230 | * Interface API for upper network layers | |
1231 | *****************************************************************************/ | |
1232 | ||
1233 | /** | |
1234 | * Open an interface. | |
1235 | * Called from generic network layer when ifconfig up is run. | |
1236 | * | |
1237 | * @param dev Pointer to interface struct. | |
1238 | * | |
1239 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1240 | */ | |
1241 | static int | |
1242 | netiucv_open(struct net_device *dev) { | |
1243 | fsm_event(((struct netiucv_priv *)dev->priv)->fsm, DEV_EVENT_START,dev); | |
1244 | return 0; | |
1245 | } | |
1246 | ||
1247 | /** | |
1248 | * Close an interface. | |
1249 | * Called from generic network layer when ifconfig down is run. | |
1250 | * | |
1251 | * @param dev Pointer to interface struct. | |
1252 | * | |
1253 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1254 | */ | |
1255 | static int | |
1256 | netiucv_close(struct net_device *dev) { | |
1257 | fsm_event(((struct netiucv_priv *)dev->priv)->fsm, DEV_EVENT_STOP, dev); | |
1258 | return 0; | |
1259 | } | |
1260 | ||
1261 | /** | |
1262 | * Start transmission of a packet. | |
1263 | * Called from generic network device layer. | |
1264 | * | |
1265 | * @param skb Pointer to buffer containing the packet. | |
1266 | * @param dev Pointer to interface struct. | |
1267 | * | |
1268 | * @return 0 if packet consumed, !0 if packet rejected. | |
1269 | * Note: If we return !0, then the packet is free'd by | |
1270 | * the generic network layer. | |
1271 | */ | |
1272 | static int netiucv_tx(struct sk_buff *skb, struct net_device *dev) | |
1273 | { | |
1274 | int rc = 0; | |
1275 | struct netiucv_priv *privptr = dev->priv; | |
1276 | ||
1277 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); | |
1278 | /** | |
1279 | * Some sanity checks ... | |
1280 | */ | |
1281 | if (skb == NULL) { | |
1282 | PRINT_WARN("%s: NULL sk_buff passed\n", dev->name); | |
1283 | IUCV_DBF_TEXT(data, 2, "netiucv_tx: skb is NULL\n"); | |
1284 | privptr->stats.tx_dropped++; | |
1285 | return 0; | |
1286 | } | |
1287 | if (skb_headroom(skb) < NETIUCV_HDRLEN) { | |
1288 | PRINT_WARN("%s: Got sk_buff with head room < %ld bytes\n", | |
1289 | dev->name, NETIUCV_HDRLEN); | |
1290 | IUCV_DBF_TEXT(data, 2, | |
1291 | "netiucv_tx: skb_headroom < NETIUCV_HDRLEN\n"); | |
1292 | dev_kfree_skb(skb); | |
1293 | privptr->stats.tx_dropped++; | |
1294 | return 0; | |
1295 | } | |
1296 | ||
1297 | /** | |
1298 | * If connection is not running, try to restart it | |
e82b0f2c | 1299 | * and throw away packet. |
1da177e4 LT |
1300 | */ |
1301 | if (fsm_getstate(privptr->fsm) != DEV_STATE_RUNNING) { | |
1302 | fsm_event(privptr->fsm, DEV_EVENT_START, dev); | |
1303 | dev_kfree_skb(skb); | |
1304 | privptr->stats.tx_dropped++; | |
1305 | privptr->stats.tx_errors++; | |
1306 | privptr->stats.tx_carrier_errors++; | |
1307 | return 0; | |
1308 | } | |
1309 | ||
1310 | if (netiucv_test_and_set_busy(dev)) { | |
1311 | IUCV_DBF_TEXT(data, 2, "EBUSY from netiucv_tx\n"); | |
1312 | return -EBUSY; | |
1313 | } | |
1314 | dev->trans_start = jiffies; | |
1315 | if (netiucv_transmit_skb(privptr->conn, skb)) | |
1316 | rc = 1; | |
1317 | netiucv_clear_busy(dev); | |
1318 | return rc; | |
1319 | } | |
1320 | ||
1321 | /** | |
1322 | * Returns interface statistics of a device. | |
1323 | * | |
1324 | * @param dev Pointer to interface struct. | |
1325 | * | |
1326 | * @return Pointer to stats struct of this interface. | |
1327 | */ | |
1328 | static struct net_device_stats * | |
1329 | netiucv_stats (struct net_device * dev) | |
1330 | { | |
1331 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1332 | return &((struct netiucv_priv *)dev->priv)->stats; | |
1333 | } | |
1334 | ||
1335 | /** | |
1336 | * Sets MTU of an interface. | |
1337 | * | |
1338 | * @param dev Pointer to interface struct. | |
1339 | * @param new_mtu The new MTU to use for this interface. | |
1340 | * | |
1341 | * @return 0 on success, -EINVAL if MTU is out of valid range. | |
1342 | * (valid range is 576 .. NETIUCV_MTU_MAX). | |
1343 | */ | |
1344 | static int | |
1345 | netiucv_change_mtu (struct net_device * dev, int new_mtu) | |
1346 | { | |
1347 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1348 | if ((new_mtu < 576) || (new_mtu > NETIUCV_MTU_MAX)) { | |
1349 | IUCV_DBF_TEXT(setup, 2, "given MTU out of valid range\n"); | |
1350 | return -EINVAL; | |
1351 | } | |
1352 | dev->mtu = new_mtu; | |
1353 | return 0; | |
1354 | } | |
1355 | ||
1356 | /** | |
1357 | * attributes in sysfs | |
1358 | *****************************************************************************/ | |
1359 | ||
1360 | static ssize_t | |
3fd3c0a5 | 1361 | user_show (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1362 | { |
1363 | struct netiucv_priv *priv = dev->driver_data; | |
1364 | ||
1365 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1366 | return sprintf(buf, "%s\n", netiucv_printname(priv->conn->userid)); | |
1367 | } | |
1368 | ||
1369 | static ssize_t | |
3fd3c0a5 | 1370 | user_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1371 | { |
1372 | struct netiucv_priv *priv = dev->driver_data; | |
1373 | struct net_device *ndev = priv->conn->netdev; | |
1374 | char *p; | |
1375 | char *tmp; | |
16a83b30 | 1376 | char username[9]; |
1da177e4 | 1377 | int i; |
16a83b30 FP |
1378 | struct iucv_connection **clist = &iucv_conns.iucv_connections; |
1379 | unsigned long flags; | |
1da177e4 LT |
1380 | |
1381 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1382 | if (count>9) { | |
1383 | PRINT_WARN("netiucv: username too long (%d)!\n", (int)count); | |
1384 | IUCV_DBF_TEXT_(setup, 2, | |
1385 | "%d is length of username\n", (int)count); | |
1386 | return -EINVAL; | |
1387 | } | |
1388 | ||
1389 | tmp = strsep((char **) &buf, "\n"); | |
1390 | for (i=0, p=tmp; i<8 && *p; i++, p++) { | |
1391 | if (isalnum(*p) || (*p == '$')) | |
16a83b30 | 1392 | username[i]= toupper(*p); |
1da177e4 LT |
1393 | else if (*p == '\n') { |
1394 | /* trailing lf, grr */ | |
1395 | break; | |
1396 | } else { | |
1397 | PRINT_WARN("netiucv: Invalid char %c in username!\n", | |
1398 | *p); | |
1399 | IUCV_DBF_TEXT_(setup, 2, | |
1400 | "username: invalid character %c\n", | |
1401 | *p); | |
1402 | return -EINVAL; | |
1403 | } | |
1404 | } | |
16a83b30 | 1405 | while (i<8) |
1da177e4 | 1406 | username[i++] = ' '; |
16a83b30 | 1407 | username[8] = '\0'; |
1da177e4 | 1408 | |
16a83b30 | 1409 | if (memcmp(username, priv->conn->userid, 9)) { |
1da177e4 LT |
1410 | /* username changed */ |
1411 | if (ndev->flags & (IFF_UP | IFF_RUNNING)) { | |
1412 | PRINT_WARN( | |
1413 | "netiucv: device %s active, connected to %s\n", | |
1414 | dev->bus_id, priv->conn->userid); | |
1415 | PRINT_WARN("netiucv: user cannot be updated\n"); | |
1416 | IUCV_DBF_TEXT(setup, 2, "user_write: device active\n"); | |
1417 | return -EBUSY; | |
1418 | } | |
1419 | } | |
16a83b30 FP |
1420 | read_lock_irqsave(&iucv_conns.iucv_rwlock, flags); |
1421 | while (*clist) { | |
1422 | if (!strncmp(username, (*clist)->userid, 9) || | |
1423 | ((*clist)->netdev != ndev)) | |
1424 | break; | |
1425 | clist = &((*clist)->next); | |
1426 | } | |
1427 | read_unlock_irqrestore(&iucv_conns.iucv_rwlock, flags); | |
1428 | if (*clist) { | |
1429 | PRINT_WARN("netiucv: Connection to %s already exists\n", | |
1430 | username); | |
1431 | return -EEXIST; | |
1432 | } | |
1da177e4 LT |
1433 | memcpy(priv->conn->userid, username, 9); |
1434 | ||
1435 | return count; | |
1436 | ||
1437 | } | |
1438 | ||
1439 | static DEVICE_ATTR(user, 0644, user_show, user_write); | |
1440 | ||
1441 | static ssize_t | |
3fd3c0a5 | 1442 | buffer_show (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1443 | { |
1444 | struct netiucv_priv *priv = dev->driver_data; | |
1445 | ||
1446 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1447 | return sprintf(buf, "%d\n", priv->conn->max_buffsize); | |
1448 | } | |
1449 | ||
1450 | static ssize_t | |
3fd3c0a5 | 1451 | buffer_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1452 | { |
1453 | struct netiucv_priv *priv = dev->driver_data; | |
1454 | struct net_device *ndev = priv->conn->netdev; | |
1455 | char *e; | |
1456 | int bs1; | |
1457 | ||
1458 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1459 | if (count >= 39) | |
1460 | return -EINVAL; | |
1461 | ||
1462 | bs1 = simple_strtoul(buf, &e, 0); | |
1463 | ||
1464 | if (e && (!isspace(*e))) { | |
1465 | PRINT_WARN("netiucv: Invalid character in buffer!\n"); | |
1466 | IUCV_DBF_TEXT_(setup, 2, "buffer_write: invalid char %c\n", *e); | |
1467 | return -EINVAL; | |
1468 | } | |
1469 | if (bs1 > NETIUCV_BUFSIZE_MAX) { | |
1470 | PRINT_WARN("netiucv: Given buffer size %d too large.\n", | |
1471 | bs1); | |
1472 | IUCV_DBF_TEXT_(setup, 2, | |
1473 | "buffer_write: buffer size %d too large\n", | |
1474 | bs1); | |
1475 | return -EINVAL; | |
1476 | } | |
1477 | if ((ndev->flags & IFF_RUNNING) && | |
1478 | (bs1 < (ndev->mtu + NETIUCV_HDRLEN + 2))) { | |
1479 | PRINT_WARN("netiucv: Given buffer size %d too small.\n", | |
1480 | bs1); | |
1481 | IUCV_DBF_TEXT_(setup, 2, | |
1482 | "buffer_write: buffer size %d too small\n", | |
1483 | bs1); | |
1484 | return -EINVAL; | |
1485 | } | |
1486 | if (bs1 < (576 + NETIUCV_HDRLEN + NETIUCV_HDRLEN)) { | |
1487 | PRINT_WARN("netiucv: Given buffer size %d too small.\n", | |
1488 | bs1); | |
1489 | IUCV_DBF_TEXT_(setup, 2, | |
1490 | "buffer_write: buffer size %d too small\n", | |
1491 | bs1); | |
1492 | return -EINVAL; | |
1493 | } | |
1494 | ||
1495 | priv->conn->max_buffsize = bs1; | |
1496 | if (!(ndev->flags & IFF_RUNNING)) | |
1497 | ndev->mtu = bs1 - NETIUCV_HDRLEN - NETIUCV_HDRLEN; | |
1498 | ||
1499 | return count; | |
1500 | ||
1501 | } | |
1502 | ||
1503 | static DEVICE_ATTR(buffer, 0644, buffer_show, buffer_write); | |
1504 | ||
1505 | static ssize_t | |
3fd3c0a5 | 1506 | dev_fsm_show (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1507 | { |
1508 | struct netiucv_priv *priv = dev->driver_data; | |
1509 | ||
1510 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1511 | return sprintf(buf, "%s\n", fsm_getstate_str(priv->fsm)); | |
1512 | } | |
1513 | ||
1514 | static DEVICE_ATTR(device_fsm_state, 0444, dev_fsm_show, NULL); | |
1515 | ||
1516 | static ssize_t | |
3fd3c0a5 | 1517 | conn_fsm_show (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1518 | { |
1519 | struct netiucv_priv *priv = dev->driver_data; | |
1520 | ||
1521 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1522 | return sprintf(buf, "%s\n", fsm_getstate_str(priv->conn->fsm)); | |
1523 | } | |
1524 | ||
1525 | static DEVICE_ATTR(connection_fsm_state, 0444, conn_fsm_show, NULL); | |
1526 | ||
1527 | static ssize_t | |
3fd3c0a5 | 1528 | maxmulti_show (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1529 | { |
1530 | struct netiucv_priv *priv = dev->driver_data; | |
1531 | ||
1532 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1533 | return sprintf(buf, "%ld\n", priv->conn->prof.maxmulti); | |
1534 | } | |
1535 | ||
1536 | static ssize_t | |
3fd3c0a5 | 1537 | maxmulti_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1538 | { |
1539 | struct netiucv_priv *priv = dev->driver_data; | |
1540 | ||
1541 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); | |
1542 | priv->conn->prof.maxmulti = 0; | |
1543 | return count; | |
1544 | } | |
1545 | ||
1546 | static DEVICE_ATTR(max_tx_buffer_used, 0644, maxmulti_show, maxmulti_write); | |
1547 | ||
1548 | static ssize_t | |
3fd3c0a5 | 1549 | maxcq_show (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1550 | { |
1551 | struct netiucv_priv *priv = dev->driver_data; | |
1552 | ||
1553 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1554 | return sprintf(buf, "%ld\n", priv->conn->prof.maxcqueue); | |
1555 | } | |
1556 | ||
1557 | static ssize_t | |
3fd3c0a5 | 1558 | maxcq_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1559 | { |
1560 | struct netiucv_priv *priv = dev->driver_data; | |
e82b0f2c | 1561 | |
1da177e4 LT |
1562 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
1563 | priv->conn->prof.maxcqueue = 0; | |
1564 | return count; | |
1565 | } | |
1566 | ||
1567 | static DEVICE_ATTR(max_chained_skbs, 0644, maxcq_show, maxcq_write); | |
1568 | ||
1569 | static ssize_t | |
3fd3c0a5 | 1570 | sdoio_show (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1571 | { |
1572 | struct netiucv_priv *priv = dev->driver_data; | |
1573 | ||
1574 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1575 | return sprintf(buf, "%ld\n", priv->conn->prof.doios_single); | |
1576 | } | |
1577 | ||
1578 | static ssize_t | |
3fd3c0a5 | 1579 | sdoio_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1580 | { |
1581 | struct netiucv_priv *priv = dev->driver_data; | |
e82b0f2c | 1582 | |
1da177e4 LT |
1583 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
1584 | priv->conn->prof.doios_single = 0; | |
1585 | return count; | |
1586 | } | |
1587 | ||
1588 | static DEVICE_ATTR(tx_single_write_ops, 0644, sdoio_show, sdoio_write); | |
1589 | ||
1590 | static ssize_t | |
3fd3c0a5 | 1591 | mdoio_show (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1592 | { |
1593 | struct netiucv_priv *priv = dev->driver_data; | |
1594 | ||
1595 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1596 | return sprintf(buf, "%ld\n", priv->conn->prof.doios_multi); | |
1597 | } | |
1598 | ||
1599 | static ssize_t | |
3fd3c0a5 | 1600 | mdoio_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1601 | { |
1602 | struct netiucv_priv *priv = dev->driver_data; | |
e82b0f2c | 1603 | |
1da177e4 LT |
1604 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); |
1605 | priv->conn->prof.doios_multi = 0; | |
1606 | return count; | |
1607 | } | |
1608 | ||
1609 | static DEVICE_ATTR(tx_multi_write_ops, 0644, mdoio_show, mdoio_write); | |
1610 | ||
1611 | static ssize_t | |
3fd3c0a5 | 1612 | txlen_show (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1613 | { |
1614 | struct netiucv_priv *priv = dev->driver_data; | |
1615 | ||
1616 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1617 | return sprintf(buf, "%ld\n", priv->conn->prof.txlen); | |
1618 | } | |
1619 | ||
1620 | static ssize_t | |
3fd3c0a5 | 1621 | txlen_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1622 | { |
1623 | struct netiucv_priv *priv = dev->driver_data; | |
e82b0f2c | 1624 | |
1da177e4 LT |
1625 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
1626 | priv->conn->prof.txlen = 0; | |
1627 | return count; | |
1628 | } | |
1629 | ||
1630 | static DEVICE_ATTR(netto_bytes, 0644, txlen_show, txlen_write); | |
1631 | ||
1632 | static ssize_t | |
3fd3c0a5 | 1633 | txtime_show (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1634 | { |
1635 | struct netiucv_priv *priv = dev->driver_data; | |
1636 | ||
1637 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1638 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_time); | |
1639 | } | |
1640 | ||
1641 | static ssize_t | |
3fd3c0a5 | 1642 | txtime_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1643 | { |
1644 | struct netiucv_priv *priv = dev->driver_data; | |
e82b0f2c | 1645 | |
1da177e4 LT |
1646 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
1647 | priv->conn->prof.tx_time = 0; | |
1648 | return count; | |
1649 | } | |
1650 | ||
1651 | static DEVICE_ATTR(max_tx_io_time, 0644, txtime_show, txtime_write); | |
1652 | ||
1653 | static ssize_t | |
3fd3c0a5 | 1654 | txpend_show (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1655 | { |
1656 | struct netiucv_priv *priv = dev->driver_data; | |
1657 | ||
1658 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1659 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_pending); | |
1660 | } | |
1661 | ||
1662 | static ssize_t | |
3fd3c0a5 | 1663 | txpend_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1664 | { |
1665 | struct netiucv_priv *priv = dev->driver_data; | |
1666 | ||
1667 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); | |
1668 | priv->conn->prof.tx_pending = 0; | |
1669 | return count; | |
1670 | } | |
1671 | ||
1672 | static DEVICE_ATTR(tx_pending, 0644, txpend_show, txpend_write); | |
1673 | ||
1674 | static ssize_t | |
3fd3c0a5 | 1675 | txmpnd_show (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1676 | { |
1677 | struct netiucv_priv *priv = dev->driver_data; | |
1678 | ||
1679 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1680 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_max_pending); | |
1681 | } | |
1682 | ||
1683 | static ssize_t | |
3fd3c0a5 | 1684 | txmpnd_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1685 | { |
1686 | struct netiucv_priv *priv = dev->driver_data; | |
1687 | ||
1688 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); | |
1689 | priv->conn->prof.tx_max_pending = 0; | |
1690 | return count; | |
1691 | } | |
1692 | ||
1693 | static DEVICE_ATTR(tx_max_pending, 0644, txmpnd_show, txmpnd_write); | |
1694 | ||
1695 | static struct attribute *netiucv_attrs[] = { | |
1696 | &dev_attr_buffer.attr, | |
1697 | &dev_attr_user.attr, | |
1698 | NULL, | |
1699 | }; | |
1700 | ||
1701 | static struct attribute_group netiucv_attr_group = { | |
1702 | .attrs = netiucv_attrs, | |
1703 | }; | |
1704 | ||
1705 | static struct attribute *netiucv_stat_attrs[] = { | |
1706 | &dev_attr_device_fsm_state.attr, | |
1707 | &dev_attr_connection_fsm_state.attr, | |
1708 | &dev_attr_max_tx_buffer_used.attr, | |
1709 | &dev_attr_max_chained_skbs.attr, | |
1710 | &dev_attr_tx_single_write_ops.attr, | |
1711 | &dev_attr_tx_multi_write_ops.attr, | |
1712 | &dev_attr_netto_bytes.attr, | |
1713 | &dev_attr_max_tx_io_time.attr, | |
1714 | &dev_attr_tx_pending.attr, | |
1715 | &dev_attr_tx_max_pending.attr, | |
1716 | NULL, | |
1717 | }; | |
1718 | ||
1719 | static struct attribute_group netiucv_stat_attr_group = { | |
1720 | .name = "stats", | |
1721 | .attrs = netiucv_stat_attrs, | |
1722 | }; | |
1723 | ||
1724 | static inline int | |
1725 | netiucv_add_files(struct device *dev) | |
1726 | { | |
1727 | int ret; | |
1728 | ||
1729 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1730 | ret = sysfs_create_group(&dev->kobj, &netiucv_attr_group); | |
1731 | if (ret) | |
1732 | return ret; | |
1733 | ret = sysfs_create_group(&dev->kobj, &netiucv_stat_attr_group); | |
1734 | if (ret) | |
1735 | sysfs_remove_group(&dev->kobj, &netiucv_attr_group); | |
1736 | return ret; | |
1737 | } | |
1738 | ||
1739 | static inline void | |
1740 | netiucv_remove_files(struct device *dev) | |
1741 | { | |
1742 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1743 | sysfs_remove_group(&dev->kobj, &netiucv_stat_attr_group); | |
1744 | sysfs_remove_group(&dev->kobj, &netiucv_attr_group); | |
1745 | } | |
1746 | ||
1747 | static int | |
1748 | netiucv_register_device(struct net_device *ndev) | |
1749 | { | |
1750 | struct netiucv_priv *priv = ndev->priv; | |
88abaab4 | 1751 | struct device *dev = kzalloc(sizeof(struct device), GFP_KERNEL); |
1da177e4 LT |
1752 | int ret; |
1753 | ||
1754 | ||
1755 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1756 | ||
1757 | if (dev) { | |
1da177e4 LT |
1758 | snprintf(dev->bus_id, BUS_ID_SIZE, "net%s", ndev->name); |
1759 | dev->bus = &iucv_bus; | |
1760 | dev->parent = iucv_root; | |
1761 | /* | |
1762 | * The release function could be called after the | |
1763 | * module has been unloaded. It's _only_ task is to | |
1764 | * free the struct. Therefore, we specify kfree() | |
1765 | * directly here. (Probably a little bit obfuscating | |
1766 | * but legitime ...). | |
1767 | */ | |
1768 | dev->release = (void (*)(struct device *))kfree; | |
1769 | dev->driver = &netiucv_driver; | |
1770 | } else | |
1771 | return -ENOMEM; | |
1772 | ||
1773 | ret = device_register(dev); | |
1774 | ||
1775 | if (ret) | |
1776 | return ret; | |
1777 | ret = netiucv_add_files(dev); | |
1778 | if (ret) | |
1779 | goto out_unreg; | |
1780 | priv->dev = dev; | |
1781 | dev->driver_data = priv; | |
1782 | return 0; | |
1783 | ||
1784 | out_unreg: | |
1785 | device_unregister(dev); | |
1786 | return ret; | |
1787 | } | |
1788 | ||
1789 | static void | |
1790 | netiucv_unregister_device(struct device *dev) | |
1791 | { | |
1792 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1793 | netiucv_remove_files(dev); | |
1794 | device_unregister(dev); | |
1795 | } | |
1796 | ||
1797 | /** | |
1798 | * Allocate and initialize a new connection structure. | |
1799 | * Add it to the list of netiucv connections; | |
1800 | */ | |
1801 | static struct iucv_connection * | |
1802 | netiucv_new_connection(struct net_device *dev, char *username) | |
1803 | { | |
16a83b30 FP |
1804 | unsigned long flags; |
1805 | struct iucv_connection **clist = &iucv_conns.iucv_connections; | |
1da177e4 | 1806 | struct iucv_connection *conn = |
88abaab4 | 1807 | kzalloc(sizeof(struct iucv_connection), GFP_KERNEL); |
1da177e4 LT |
1808 | |
1809 | if (conn) { | |
1da177e4 LT |
1810 | skb_queue_head_init(&conn->collect_queue); |
1811 | skb_queue_head_init(&conn->commit_queue); | |
16a83b30 | 1812 | spin_lock_init(&conn->collect_lock); |
1da177e4 LT |
1813 | conn->max_buffsize = NETIUCV_BUFSIZE_DEFAULT; |
1814 | conn->netdev = dev; | |
1815 | ||
1816 | conn->rx_buff = alloc_skb(NETIUCV_BUFSIZE_DEFAULT, | |
1817 | GFP_KERNEL | GFP_DMA); | |
1818 | if (!conn->rx_buff) { | |
1819 | kfree(conn); | |
1820 | return NULL; | |
1821 | } | |
1822 | conn->tx_buff = alloc_skb(NETIUCV_BUFSIZE_DEFAULT, | |
1823 | GFP_KERNEL | GFP_DMA); | |
1824 | if (!conn->tx_buff) { | |
1825 | kfree_skb(conn->rx_buff); | |
1826 | kfree(conn); | |
1827 | return NULL; | |
1828 | } | |
1829 | conn->fsm = init_fsm("netiucvconn", conn_state_names, | |
1830 | conn_event_names, NR_CONN_STATES, | |
1831 | NR_CONN_EVENTS, conn_fsm, CONN_FSM_LEN, | |
1832 | GFP_KERNEL); | |
1833 | if (!conn->fsm) { | |
1834 | kfree_skb(conn->tx_buff); | |
1835 | kfree_skb(conn->rx_buff); | |
1836 | kfree(conn); | |
1837 | return NULL; | |
1838 | } | |
1839 | fsm_settimer(conn->fsm, &conn->timer); | |
1840 | fsm_newstate(conn->fsm, CONN_STATE_INVALID); | |
1841 | ||
1842 | if (username) { | |
1843 | memcpy(conn->userid, username, 9); | |
1844 | fsm_newstate(conn->fsm, CONN_STATE_STOPPED); | |
1845 | } | |
1846 | ||
16a83b30 | 1847 | write_lock_irqsave(&iucv_conns.iucv_rwlock, flags); |
1da177e4 LT |
1848 | conn->next = *clist; |
1849 | *clist = conn; | |
16a83b30 | 1850 | write_unlock_irqrestore(&iucv_conns.iucv_rwlock, flags); |
1da177e4 LT |
1851 | } |
1852 | return conn; | |
1853 | } | |
1854 | ||
1855 | /** | |
1856 | * Release a connection structure and remove it from the | |
1857 | * list of netiucv connections. | |
1858 | */ | |
1859 | static void | |
1860 | netiucv_remove_connection(struct iucv_connection *conn) | |
1861 | { | |
16a83b30 FP |
1862 | struct iucv_connection **clist = &iucv_conns.iucv_connections; |
1863 | unsigned long flags; | |
1da177e4 LT |
1864 | |
1865 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1866 | if (conn == NULL) | |
1867 | return; | |
16a83b30 | 1868 | write_lock_irqsave(&iucv_conns.iucv_rwlock, flags); |
1da177e4 LT |
1869 | while (*clist) { |
1870 | if (*clist == conn) { | |
1871 | *clist = conn->next; | |
16a83b30 | 1872 | write_unlock_irqrestore(&iucv_conns.iucv_rwlock, flags); |
1da177e4 LT |
1873 | if (conn->handle) { |
1874 | iucv_unregister_program(conn->handle); | |
1875 | conn->handle = NULL; | |
1876 | } | |
1877 | fsm_deltimer(&conn->timer); | |
1878 | kfree_fsm(conn->fsm); | |
1879 | kfree_skb(conn->rx_buff); | |
1880 | kfree_skb(conn->tx_buff); | |
1881 | return; | |
1882 | } | |
1883 | clist = &((*clist)->next); | |
1884 | } | |
16a83b30 | 1885 | write_unlock_irqrestore(&iucv_conns.iucv_rwlock, flags); |
1da177e4 LT |
1886 | } |
1887 | ||
1888 | /** | |
1889 | * Release everything of a net device. | |
1890 | */ | |
1891 | static void | |
1892 | netiucv_free_netdevice(struct net_device *dev) | |
1893 | { | |
1894 | struct netiucv_priv *privptr; | |
1895 | ||
1896 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1897 | ||
1898 | if (!dev) | |
1899 | return; | |
1900 | ||
1901 | privptr = (struct netiucv_priv *)dev->priv; | |
1902 | if (privptr) { | |
1903 | if (privptr->conn) | |
1904 | netiucv_remove_connection(privptr->conn); | |
1905 | if (privptr->fsm) | |
1906 | kfree_fsm(privptr->fsm); | |
1907 | privptr->conn = NULL; privptr->fsm = NULL; | |
1908 | /* privptr gets freed by free_netdev() */ | |
1909 | } | |
1910 | free_netdev(dev); | |
1911 | } | |
1912 | ||
1913 | /** | |
1914 | * Initialize a net device. (Called from kernel in alloc_netdev()) | |
1915 | */ | |
1916 | static void | |
1917 | netiucv_setup_netdevice(struct net_device *dev) | |
1918 | { | |
1919 | memset(dev->priv, 0, sizeof(struct netiucv_priv)); | |
1920 | ||
1921 | dev->mtu = NETIUCV_MTU_DEFAULT; | |
1922 | dev->hard_start_xmit = netiucv_tx; | |
1923 | dev->open = netiucv_open; | |
1924 | dev->stop = netiucv_close; | |
1925 | dev->get_stats = netiucv_stats; | |
1926 | dev->change_mtu = netiucv_change_mtu; | |
1927 | dev->destructor = netiucv_free_netdevice; | |
1928 | dev->hard_header_len = NETIUCV_HDRLEN; | |
1929 | dev->addr_len = 0; | |
1930 | dev->type = ARPHRD_SLIP; | |
1931 | dev->tx_queue_len = NETIUCV_QUEUELEN_DEFAULT; | |
1932 | dev->flags = IFF_POINTOPOINT | IFF_NOARP; | |
1933 | SET_MODULE_OWNER(dev); | |
1934 | } | |
1935 | ||
1936 | /** | |
1937 | * Allocate and initialize everything of a net device. | |
1938 | */ | |
1939 | static struct net_device * | |
1940 | netiucv_init_netdevice(char *username) | |
1941 | { | |
1942 | struct netiucv_priv *privptr; | |
1943 | struct net_device *dev; | |
1944 | ||
1945 | dev = alloc_netdev(sizeof(struct netiucv_priv), "iucv%d", | |
1946 | netiucv_setup_netdevice); | |
1947 | if (!dev) | |
1948 | return NULL; | |
1949 | if (dev_alloc_name(dev, dev->name) < 0) { | |
1950 | free_netdev(dev); | |
1951 | return NULL; | |
1952 | } | |
1953 | ||
1954 | privptr = (struct netiucv_priv *)dev->priv; | |
1955 | privptr->fsm = init_fsm("netiucvdev", dev_state_names, | |
1956 | dev_event_names, NR_DEV_STATES, NR_DEV_EVENTS, | |
1957 | dev_fsm, DEV_FSM_LEN, GFP_KERNEL); | |
1958 | if (!privptr->fsm) { | |
1959 | free_netdev(dev); | |
1960 | return NULL; | |
1961 | } | |
1962 | privptr->conn = netiucv_new_connection(dev, username); | |
1963 | if (!privptr->conn) { | |
1964 | kfree_fsm(privptr->fsm); | |
1965 | free_netdev(dev); | |
1966 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_new_connection\n"); | |
1967 | return NULL; | |
1968 | } | |
1969 | fsm_newstate(privptr->fsm, DEV_STATE_STOPPED); | |
1970 | ||
1971 | return dev; | |
1972 | } | |
1973 | ||
1974 | static ssize_t | |
1975 | conn_write(struct device_driver *drv, const char *buf, size_t count) | |
1976 | { | |
1977 | char *p; | |
16a83b30 | 1978 | char username[9]; |
1da177e4 LT |
1979 | int i, ret; |
1980 | struct net_device *dev; | |
16a83b30 FP |
1981 | struct iucv_connection **clist = &iucv_conns.iucv_connections; |
1982 | unsigned long flags; | |
1da177e4 LT |
1983 | |
1984 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1985 | if (count>9) { | |
1986 | PRINT_WARN("netiucv: username too long (%d)!\n", (int)count); | |
1987 | IUCV_DBF_TEXT(setup, 2, "conn_write: too long\n"); | |
1988 | return -EINVAL; | |
1989 | } | |
1990 | ||
1991 | for (i=0, p=(char *)buf; i<8 && *p; i++, p++) { | |
1992 | if (isalnum(*p) || (*p == '$')) | |
16a83b30 | 1993 | username[i]= toupper(*p); |
1da177e4 LT |
1994 | else if (*p == '\n') { |
1995 | /* trailing lf, grr */ | |
1996 | break; | |
1997 | } else { | |
1998 | PRINT_WARN("netiucv: Invalid character in username!\n"); | |
1999 | IUCV_DBF_TEXT_(setup, 2, | |
2000 | "conn_write: invalid character %c\n", *p); | |
2001 | return -EINVAL; | |
2002 | } | |
2003 | } | |
16a83b30 | 2004 | while (i<8) |
1da177e4 | 2005 | username[i++] = ' '; |
16a83b30 FP |
2006 | username[8] = '\0'; |
2007 | ||
2008 | read_lock_irqsave(&iucv_conns.iucv_rwlock, flags); | |
2009 | while (*clist) { | |
2010 | if (!strncmp(username, (*clist)->userid, 9)) | |
2011 | break; | |
2012 | clist = &((*clist)->next); | |
2013 | } | |
2014 | read_unlock_irqrestore(&iucv_conns.iucv_rwlock, flags); | |
2015 | if (*clist) { | |
2016 | PRINT_WARN("netiucv: Connection to %s already exists\n", | |
2017 | username); | |
2018 | return -EEXIST; | |
2019 | } | |
1da177e4 LT |
2020 | dev = netiucv_init_netdevice(username); |
2021 | if (!dev) { | |
2022 | PRINT_WARN( | |
2023 | "netiucv: Could not allocate network device structure " | |
2024 | "for user '%s'\n", netiucv_printname(username)); | |
2025 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_init_netdevice\n"); | |
2026 | return -ENODEV; | |
2027 | } | |
2028 | ||
2029 | if ((ret = netiucv_register_device(dev))) { | |
2030 | IUCV_DBF_TEXT_(setup, 2, | |
2031 | "ret %d from netiucv_register_device\n", ret); | |
2032 | goto out_free_ndev; | |
2033 | } | |
2034 | ||
2035 | /* sysfs magic */ | |
2036 | SET_NETDEV_DEV(dev, | |
2037 | (struct device*)((struct netiucv_priv*)dev->priv)->dev); | |
2038 | ||
2039 | if ((ret = register_netdev(dev))) { | |
2040 | netiucv_unregister_device((struct device*) | |
2041 | ((struct netiucv_priv*)dev->priv)->dev); | |
2042 | goto out_free_ndev; | |
2043 | } | |
2044 | ||
2045 | PRINT_INFO("%s: '%s'\n", dev->name, netiucv_printname(username)); | |
e82b0f2c | 2046 | |
1da177e4 LT |
2047 | return count; |
2048 | ||
2049 | out_free_ndev: | |
2050 | PRINT_WARN("netiucv: Could not register '%s'\n", dev->name); | |
2051 | IUCV_DBF_TEXT(setup, 2, "conn_write: could not register\n"); | |
2052 | netiucv_free_netdevice(dev); | |
2053 | return ret; | |
2054 | } | |
2055 | ||
2b67fc46 | 2056 | static DRIVER_ATTR(connection, 0200, NULL, conn_write); |
1da177e4 LT |
2057 | |
2058 | static ssize_t | |
2059 | remove_write (struct device_driver *drv, const char *buf, size_t count) | |
2060 | { | |
16a83b30 FP |
2061 | struct iucv_connection **clist = &iucv_conns.iucv_connections; |
2062 | unsigned long flags; | |
1da177e4 LT |
2063 | struct net_device *ndev; |
2064 | struct netiucv_priv *priv; | |
2065 | struct device *dev; | |
2066 | char name[IFNAMSIZ]; | |
2067 | char *p; | |
2068 | int i; | |
2069 | ||
2070 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
2071 | ||
2072 | if (count >= IFNAMSIZ) | |
16a83b30 | 2073 | count = IFNAMSIZ - 1;; |
1da177e4 LT |
2074 | |
2075 | for (i=0, p=(char *)buf; i<count && *p; i++, p++) { | |
f1c0a578 | 2076 | if ((*p == '\n') || (*p == ' ')) { |
1da177e4 LT |
2077 | /* trailing lf, grr */ |
2078 | break; | |
2079 | } else { | |
2080 | name[i]=*p; | |
2081 | } | |
2082 | } | |
2083 | name[i] = '\0'; | |
2084 | ||
16a83b30 | 2085 | read_lock_irqsave(&iucv_conns.iucv_rwlock, flags); |
1da177e4 LT |
2086 | while (*clist) { |
2087 | ndev = (*clist)->netdev; | |
2088 | priv = (struct netiucv_priv*)ndev->priv; | |
2089 | dev = priv->dev; | |
2090 | ||
2091 | if (strncmp(name, ndev->name, count)) { | |
2092 | clist = &((*clist)->next); | |
2093 | continue; | |
2094 | } | |
16a83b30 | 2095 | read_unlock_irqrestore(&iucv_conns.iucv_rwlock, flags); |
1da177e4 LT |
2096 | if (ndev->flags & (IFF_UP | IFF_RUNNING)) { |
2097 | PRINT_WARN( | |
2098 | "netiucv: net device %s active with peer %s\n", | |
2099 | ndev->name, priv->conn->userid); | |
2100 | PRINT_WARN("netiucv: %s cannot be removed\n", | |
2101 | ndev->name); | |
2102 | IUCV_DBF_TEXT(data, 2, "remove_write: still active\n"); | |
2103 | return -EBUSY; | |
2104 | } | |
2105 | unregister_netdev(ndev); | |
2106 | netiucv_unregister_device(dev); | |
2107 | return count; | |
2108 | } | |
16a83b30 | 2109 | read_unlock_irqrestore(&iucv_conns.iucv_rwlock, flags); |
1da177e4 LT |
2110 | PRINT_WARN("netiucv: net device %s unknown\n", name); |
2111 | IUCV_DBF_TEXT(data, 2, "remove_write: unknown device\n"); | |
2112 | return -EINVAL; | |
2113 | } | |
2114 | ||
2b67fc46 | 2115 | static DRIVER_ATTR(remove, 0200, NULL, remove_write); |
1da177e4 LT |
2116 | |
2117 | static void | |
2118 | netiucv_banner(void) | |
2119 | { | |
e018ba1f | 2120 | PRINT_INFO("NETIUCV driver initialized\n"); |
1da177e4 LT |
2121 | } |
2122 | ||
2123 | static void __exit | |
2124 | netiucv_exit(void) | |
2125 | { | |
2126 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
16a83b30 FP |
2127 | while (iucv_conns.iucv_connections) { |
2128 | struct net_device *ndev = iucv_conns.iucv_connections->netdev; | |
1da177e4 LT |
2129 | struct netiucv_priv *priv = (struct netiucv_priv*)ndev->priv; |
2130 | struct device *dev = priv->dev; | |
2131 | ||
2132 | unregister_netdev(ndev); | |
2133 | netiucv_unregister_device(dev); | |
2134 | } | |
2135 | ||
2136 | driver_remove_file(&netiucv_driver, &driver_attr_connection); | |
2137 | driver_remove_file(&netiucv_driver, &driver_attr_remove); | |
2138 | driver_unregister(&netiucv_driver); | |
2139 | iucv_unregister_dbf_views(); | |
2140 | ||
2141 | PRINT_INFO("NETIUCV driver unloaded\n"); | |
2142 | return; | |
2143 | } | |
2144 | ||
2145 | static int __init | |
2146 | netiucv_init(void) | |
2147 | { | |
2148 | int ret; | |
e82b0f2c | 2149 | |
1da177e4 LT |
2150 | ret = iucv_register_dbf_views(); |
2151 | if (ret) { | |
2152 | PRINT_WARN("netiucv_init failed, " | |
2153 | "iucv_register_dbf_views rc = %d\n", ret); | |
2154 | return ret; | |
2155 | } | |
2156 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
2157 | ret = driver_register(&netiucv_driver); | |
2158 | if (ret) { | |
2159 | PRINT_ERR("NETIUCV: failed to register driver.\n"); | |
2160 | IUCV_DBF_TEXT_(setup, 2, "ret %d from driver_register\n", ret); | |
2161 | iucv_unregister_dbf_views(); | |
2162 | return ret; | |
2163 | } | |
2164 | ||
2165 | /* Add entry for specifying connections. */ | |
2166 | ret = driver_create_file(&netiucv_driver, &driver_attr_connection); | |
2167 | if (!ret) { | |
2168 | ret = driver_create_file(&netiucv_driver, &driver_attr_remove); | |
2169 | netiucv_banner(); | |
16a83b30 | 2170 | rwlock_init(&iucv_conns.iucv_rwlock); |
1da177e4 LT |
2171 | } else { |
2172 | PRINT_ERR("NETIUCV: failed to add driver attribute.\n"); | |
2173 | IUCV_DBF_TEXT_(setup, 2, "ret %d from driver_create_file\n", ret); | |
2174 | driver_unregister(&netiucv_driver); | |
2175 | iucv_unregister_dbf_views(); | |
2176 | } | |
2177 | return ret; | |
2178 | } | |
e82b0f2c | 2179 | |
1da177e4 LT |
2180 | module_init(netiucv_init); |
2181 | module_exit(netiucv_exit); | |
2182 | MODULE_LICENSE("GPL"); |