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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * IUCV network driver |
3 | * | |
eebce385 | 4 | * Copyright 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation |
1da177e4 LT |
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> | |
1da177e4 LT |
44 | #include <linux/bitops.h> |
45 | ||
46 | #include <linux/signal.h> | |
47 | #include <linux/string.h> | |
48 | #include <linux/device.h> | |
49 | ||
50 | #include <linux/ip.h> | |
51 | #include <linux/if_arp.h> | |
52 | #include <linux/tcp.h> | |
53 | #include <linux/skbuff.h> | |
54 | #include <linux/ctype.h> | |
55 | #include <net/dst.h> | |
56 | ||
57 | #include <asm/io.h> | |
58 | #include <asm/uaccess.h> | |
59 | ||
eebce385 | 60 | #include <net/iucv/iucv.h> |
1da177e4 LT |
61 | #include "fsm.h" |
62 | ||
63 | MODULE_AUTHOR | |
64 | ("(C) 2001 IBM Corporation by Fritz Elfert (felfert@millenux.com)"); | |
65 | MODULE_DESCRIPTION ("Linux for S/390 IUCV network driver"); | |
66 | ||
eebce385 MS |
67 | /** |
68 | * Debug Facility stuff | |
69 | */ | |
70 | #define IUCV_DBF_SETUP_NAME "iucv_setup" | |
71 | #define IUCV_DBF_SETUP_LEN 32 | |
72 | #define IUCV_DBF_SETUP_PAGES 2 | |
73 | #define IUCV_DBF_SETUP_NR_AREAS 1 | |
74 | #define IUCV_DBF_SETUP_LEVEL 3 | |
75 | ||
76 | #define IUCV_DBF_DATA_NAME "iucv_data" | |
77 | #define IUCV_DBF_DATA_LEN 128 | |
78 | #define IUCV_DBF_DATA_PAGES 2 | |
79 | #define IUCV_DBF_DATA_NR_AREAS 1 | |
80 | #define IUCV_DBF_DATA_LEVEL 2 | |
81 | ||
82 | #define IUCV_DBF_TRACE_NAME "iucv_trace" | |
83 | #define IUCV_DBF_TRACE_LEN 16 | |
84 | #define IUCV_DBF_TRACE_PAGES 4 | |
85 | #define IUCV_DBF_TRACE_NR_AREAS 1 | |
86 | #define IUCV_DBF_TRACE_LEVEL 3 | |
87 | ||
88 | #define IUCV_DBF_TEXT(name,level,text) \ | |
89 | do { \ | |
90 | debug_text_event(iucv_dbf_##name,level,text); \ | |
91 | } while (0) | |
92 | ||
93 | #define IUCV_DBF_HEX(name,level,addr,len) \ | |
94 | do { \ | |
95 | debug_event(iucv_dbf_##name,level,(void*)(addr),len); \ | |
96 | } while (0) | |
97 | ||
98 | DECLARE_PER_CPU(char[256], iucv_dbf_txt_buf); | |
99 | ||
100 | #define IUCV_DBF_TEXT_(name,level,text...) \ | |
101 | do { \ | |
102 | char* iucv_dbf_txt_buf = get_cpu_var(iucv_dbf_txt_buf); \ | |
103 | sprintf(iucv_dbf_txt_buf, text); \ | |
104 | debug_text_event(iucv_dbf_##name,level,iucv_dbf_txt_buf); \ | |
105 | put_cpu_var(iucv_dbf_txt_buf); \ | |
106 | } while (0) | |
107 | ||
108 | #define IUCV_DBF_SPRINTF(name,level,text...) \ | |
109 | do { \ | |
110 | debug_sprintf_event(iucv_dbf_trace, level, ##text ); \ | |
111 | debug_sprintf_event(iucv_dbf_trace, level, text ); \ | |
112 | } while (0) | |
113 | ||
114 | /** | |
115 | * some more debug stuff | |
116 | */ | |
117 | #define IUCV_HEXDUMP16(importance,header,ptr) \ | |
118 | PRINT_##importance(header "%02x %02x %02x %02x %02x %02x %02x %02x " \ | |
119 | "%02x %02x %02x %02x %02x %02x %02x %02x\n", \ | |
120 | *(((char*)ptr)),*(((char*)ptr)+1),*(((char*)ptr)+2), \ | |
121 | *(((char*)ptr)+3),*(((char*)ptr)+4),*(((char*)ptr)+5), \ | |
122 | *(((char*)ptr)+6),*(((char*)ptr)+7),*(((char*)ptr)+8), \ | |
123 | *(((char*)ptr)+9),*(((char*)ptr)+10),*(((char*)ptr)+11), \ | |
124 | *(((char*)ptr)+12),*(((char*)ptr)+13), \ | |
125 | *(((char*)ptr)+14),*(((char*)ptr)+15)); \ | |
126 | PRINT_##importance(header "%02x %02x %02x %02x %02x %02x %02x %02x " \ | |
127 | "%02x %02x %02x %02x %02x %02x %02x %02x\n", \ | |
128 | *(((char*)ptr)+16),*(((char*)ptr)+17), \ | |
129 | *(((char*)ptr)+18),*(((char*)ptr)+19), \ | |
130 | *(((char*)ptr)+20),*(((char*)ptr)+21), \ | |
131 | *(((char*)ptr)+22),*(((char*)ptr)+23), \ | |
132 | *(((char*)ptr)+24),*(((char*)ptr)+25), \ | |
133 | *(((char*)ptr)+26),*(((char*)ptr)+27), \ | |
134 | *(((char*)ptr)+28),*(((char*)ptr)+29), \ | |
135 | *(((char*)ptr)+30),*(((char*)ptr)+31)); | |
136 | ||
1da177e4 LT |
137 | #define PRINTK_HEADER " iucv: " /* for debugging */ |
138 | ||
139 | static struct device_driver netiucv_driver = { | |
2219510f | 140 | .owner = THIS_MODULE, |
1da177e4 LT |
141 | .name = "netiucv", |
142 | .bus = &iucv_bus, | |
143 | }; | |
144 | ||
eebce385 MS |
145 | static int netiucv_callback_connreq(struct iucv_path *, |
146 | u8 ipvmid[8], u8 ipuser[16]); | |
147 | static void netiucv_callback_connack(struct iucv_path *, u8 ipuser[16]); | |
148 | static void netiucv_callback_connrej(struct iucv_path *, u8 ipuser[16]); | |
149 | static void netiucv_callback_connsusp(struct iucv_path *, u8 ipuser[16]); | |
150 | static void netiucv_callback_connres(struct iucv_path *, u8 ipuser[16]); | |
151 | static void netiucv_callback_rx(struct iucv_path *, struct iucv_message *); | |
152 | static void netiucv_callback_txdone(struct iucv_path *, struct iucv_message *); | |
153 | ||
154 | static struct iucv_handler netiucv_handler = { | |
155 | .path_pending = netiucv_callback_connreq, | |
156 | .path_complete = netiucv_callback_connack, | |
157 | .path_severed = netiucv_callback_connrej, | |
158 | .path_quiesced = netiucv_callback_connsusp, | |
159 | .path_resumed = netiucv_callback_connres, | |
160 | .message_pending = netiucv_callback_rx, | |
161 | .message_complete = netiucv_callback_txdone | |
162 | }; | |
163 | ||
1da177e4 LT |
164 | /** |
165 | * Per connection profiling data | |
166 | */ | |
167 | struct connection_profile { | |
168 | unsigned long maxmulti; | |
169 | unsigned long maxcqueue; | |
170 | unsigned long doios_single; | |
171 | unsigned long doios_multi; | |
172 | unsigned long txlen; | |
173 | unsigned long tx_time; | |
174 | struct timespec send_stamp; | |
175 | unsigned long tx_pending; | |
176 | unsigned long tx_max_pending; | |
177 | }; | |
178 | ||
179 | /** | |
180 | * Representation of one iucv connection | |
181 | */ | |
182 | struct iucv_connection { | |
eebce385 MS |
183 | struct list_head list; |
184 | struct iucv_path *path; | |
1da177e4 LT |
185 | struct sk_buff *rx_buff; |
186 | struct sk_buff *tx_buff; | |
187 | struct sk_buff_head collect_queue; | |
188 | struct sk_buff_head commit_queue; | |
189 | spinlock_t collect_lock; | |
190 | int collect_len; | |
191 | int max_buffsize; | |
192 | fsm_timer timer; | |
193 | fsm_instance *fsm; | |
194 | struct net_device *netdev; | |
195 | struct connection_profile prof; | |
196 | char userid[9]; | |
197 | }; | |
198 | ||
199 | /** | |
200 | * Linked list of all connection structs. | |
201 | */ | |
c11ca97e | 202 | static LIST_HEAD(iucv_connection_list); |
bfac0d0b | 203 | static DEFINE_RWLOCK(iucv_connection_rwlock); |
1da177e4 LT |
204 | |
205 | /** | |
206 | * Representation of event-data for the | |
207 | * connection state machine. | |
208 | */ | |
209 | struct iucv_event { | |
210 | struct iucv_connection *conn; | |
211 | void *data; | |
212 | }; | |
213 | ||
214 | /** | |
215 | * Private part of the network device structure | |
216 | */ | |
217 | struct netiucv_priv { | |
218 | struct net_device_stats stats; | |
219 | unsigned long tbusy; | |
220 | fsm_instance *fsm; | |
221 | struct iucv_connection *conn; | |
222 | struct device *dev; | |
223 | }; | |
224 | ||
225 | /** | |
226 | * Link level header for a packet. | |
227 | */ | |
eebce385 MS |
228 | struct ll_header { |
229 | u16 next; | |
230 | }; | |
1da177e4 | 231 | |
eebce385 | 232 | #define NETIUCV_HDRLEN (sizeof(struct ll_header)) |
1da177e4 LT |
233 | #define NETIUCV_BUFSIZE_MAX 32768 |
234 | #define NETIUCV_BUFSIZE_DEFAULT NETIUCV_BUFSIZE_MAX | |
235 | #define NETIUCV_MTU_MAX (NETIUCV_BUFSIZE_MAX - NETIUCV_HDRLEN) | |
236 | #define NETIUCV_MTU_DEFAULT 9216 | |
237 | #define NETIUCV_QUEUELEN_DEFAULT 50 | |
238 | #define NETIUCV_TIMEOUT_5SEC 5000 | |
239 | ||
240 | /** | |
241 | * Compatibility macros for busy handling | |
242 | * of network devices. | |
243 | */ | |
eebce385 | 244 | static inline void netiucv_clear_busy(struct net_device *dev) |
1da177e4 | 245 | { |
eebce385 MS |
246 | struct netiucv_priv *priv = netdev_priv(dev); |
247 | clear_bit(0, &priv->tbusy); | |
1da177e4 LT |
248 | netif_wake_queue(dev); |
249 | } | |
250 | ||
eebce385 | 251 | static inline int netiucv_test_and_set_busy(struct net_device *dev) |
1da177e4 | 252 | { |
eebce385 | 253 | struct netiucv_priv *priv = netdev_priv(dev); |
1da177e4 | 254 | netif_stop_queue(dev); |
eebce385 | 255 | return test_and_set_bit(0, &priv->tbusy); |
1da177e4 LT |
256 | } |
257 | ||
eebce385 | 258 | static u8 iucvMagic[16] = { |
1da177e4 LT |
259 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, |
260 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40 | |
261 | }; | |
262 | ||
1da177e4 LT |
263 | /** |
264 | * Convert an iucv userId to its printable | |
265 | * form (strip whitespace at end). | |
266 | * | |
267 | * @param An iucv userId | |
268 | * | |
269 | * @returns The printable string (static data!!) | |
270 | */ | |
d4614627 | 271 | static char *netiucv_printname(char *name) |
1da177e4 LT |
272 | { |
273 | static char tmp[9]; | |
274 | char *p = tmp; | |
275 | memcpy(tmp, name, 8); | |
276 | tmp[8] = '\0'; | |
277 | while (*p && (!isspace(*p))) | |
278 | p++; | |
279 | *p = '\0'; | |
280 | return tmp; | |
281 | } | |
e82b0f2c | 282 | |
1da177e4 LT |
283 | /** |
284 | * States of the interface statemachine. | |
285 | */ | |
286 | enum dev_states { | |
287 | DEV_STATE_STOPPED, | |
288 | DEV_STATE_STARTWAIT, | |
289 | DEV_STATE_STOPWAIT, | |
290 | DEV_STATE_RUNNING, | |
291 | /** | |
292 | * MUST be always the last element!! | |
293 | */ | |
294 | NR_DEV_STATES | |
295 | }; | |
296 | ||
297 | static const char *dev_state_names[] = { | |
298 | "Stopped", | |
299 | "StartWait", | |
300 | "StopWait", | |
301 | "Running", | |
302 | }; | |
303 | ||
304 | /** | |
305 | * Events of the interface statemachine. | |
306 | */ | |
307 | enum dev_events { | |
308 | DEV_EVENT_START, | |
309 | DEV_EVENT_STOP, | |
310 | DEV_EVENT_CONUP, | |
311 | DEV_EVENT_CONDOWN, | |
312 | /** | |
313 | * MUST be always the last element!! | |
314 | */ | |
315 | NR_DEV_EVENTS | |
316 | }; | |
317 | ||
318 | static const char *dev_event_names[] = { | |
319 | "Start", | |
320 | "Stop", | |
321 | "Connection up", | |
322 | "Connection down", | |
323 | }; | |
e82b0f2c | 324 | |
1da177e4 LT |
325 | /** |
326 | * Events of the connection statemachine | |
327 | */ | |
328 | enum conn_events { | |
329 | /** | |
330 | * Events, representing callbacks from | |
331 | * lowlevel iucv layer) | |
332 | */ | |
333 | CONN_EVENT_CONN_REQ, | |
334 | CONN_EVENT_CONN_ACK, | |
335 | CONN_EVENT_CONN_REJ, | |
336 | CONN_EVENT_CONN_SUS, | |
337 | CONN_EVENT_CONN_RES, | |
338 | CONN_EVENT_RX, | |
339 | CONN_EVENT_TXDONE, | |
340 | ||
341 | /** | |
342 | * Events, representing errors return codes from | |
343 | * calls to lowlevel iucv layer | |
344 | */ | |
345 | ||
346 | /** | |
347 | * Event, representing timer expiry. | |
348 | */ | |
349 | CONN_EVENT_TIMER, | |
350 | ||
351 | /** | |
352 | * Events, representing commands from upper levels. | |
353 | */ | |
354 | CONN_EVENT_START, | |
355 | CONN_EVENT_STOP, | |
356 | ||
357 | /** | |
358 | * MUST be always the last element!! | |
359 | */ | |
360 | NR_CONN_EVENTS, | |
361 | }; | |
362 | ||
363 | static const char *conn_event_names[] = { | |
364 | "Remote connection request", | |
365 | "Remote connection acknowledge", | |
366 | "Remote connection reject", | |
367 | "Connection suspended", | |
368 | "Connection resumed", | |
369 | "Data received", | |
370 | "Data sent", | |
371 | ||
372 | "Timer", | |
373 | ||
374 | "Start", | |
375 | "Stop", | |
376 | }; | |
377 | ||
378 | /** | |
379 | * States of the connection statemachine. | |
380 | */ | |
381 | enum conn_states { | |
382 | /** | |
383 | * Connection not assigned to any device, | |
384 | * initial state, invalid | |
385 | */ | |
386 | CONN_STATE_INVALID, | |
387 | ||
388 | /** | |
389 | * Userid assigned but not operating | |
390 | */ | |
391 | CONN_STATE_STOPPED, | |
392 | ||
393 | /** | |
394 | * Connection registered, | |
395 | * no connection request sent yet, | |
396 | * no connection request received | |
397 | */ | |
398 | CONN_STATE_STARTWAIT, | |
399 | ||
400 | /** | |
401 | * Connection registered and connection request sent, | |
402 | * no acknowledge and no connection request received yet. | |
403 | */ | |
404 | CONN_STATE_SETUPWAIT, | |
405 | ||
406 | /** | |
407 | * Connection up and running idle | |
408 | */ | |
409 | CONN_STATE_IDLE, | |
410 | ||
411 | /** | |
412 | * Data sent, awaiting CONN_EVENT_TXDONE | |
413 | */ | |
414 | CONN_STATE_TX, | |
415 | ||
416 | /** | |
417 | * Error during registration. | |
418 | */ | |
419 | CONN_STATE_REGERR, | |
420 | ||
421 | /** | |
422 | * Error during registration. | |
423 | */ | |
424 | CONN_STATE_CONNERR, | |
425 | ||
426 | /** | |
427 | * MUST be always the last element!! | |
428 | */ | |
429 | NR_CONN_STATES, | |
430 | }; | |
431 | ||
432 | static const char *conn_state_names[] = { | |
433 | "Invalid", | |
434 | "Stopped", | |
435 | "StartWait", | |
436 | "SetupWait", | |
437 | "Idle", | |
438 | "TX", | |
439 | "Terminating", | |
440 | "Registration error", | |
441 | "Connect error", | |
442 | }; | |
443 | ||
e82b0f2c | 444 | |
1da177e4 LT |
445 | /** |
446 | * Debug Facility Stuff | |
447 | */ | |
448 | static debug_info_t *iucv_dbf_setup = NULL; | |
449 | static debug_info_t *iucv_dbf_data = NULL; | |
450 | static debug_info_t *iucv_dbf_trace = NULL; | |
451 | ||
452 | DEFINE_PER_CPU(char[256], iucv_dbf_txt_buf); | |
453 | ||
eebce385 | 454 | static void iucv_unregister_dbf_views(void) |
1da177e4 LT |
455 | { |
456 | if (iucv_dbf_setup) | |
457 | debug_unregister(iucv_dbf_setup); | |
458 | if (iucv_dbf_data) | |
459 | debug_unregister(iucv_dbf_data); | |
460 | if (iucv_dbf_trace) | |
461 | debug_unregister(iucv_dbf_trace); | |
462 | } | |
eebce385 | 463 | static int iucv_register_dbf_views(void) |
1da177e4 LT |
464 | { |
465 | iucv_dbf_setup = debug_register(IUCV_DBF_SETUP_NAME, | |
66a464db | 466 | IUCV_DBF_SETUP_PAGES, |
1da177e4 LT |
467 | IUCV_DBF_SETUP_NR_AREAS, |
468 | IUCV_DBF_SETUP_LEN); | |
469 | iucv_dbf_data = debug_register(IUCV_DBF_DATA_NAME, | |
66a464db | 470 | IUCV_DBF_DATA_PAGES, |
1da177e4 LT |
471 | IUCV_DBF_DATA_NR_AREAS, |
472 | IUCV_DBF_DATA_LEN); | |
473 | iucv_dbf_trace = debug_register(IUCV_DBF_TRACE_NAME, | |
66a464db | 474 | IUCV_DBF_TRACE_PAGES, |
1da177e4 LT |
475 | IUCV_DBF_TRACE_NR_AREAS, |
476 | IUCV_DBF_TRACE_LEN); | |
477 | ||
478 | if ((iucv_dbf_setup == NULL) || (iucv_dbf_data == NULL) || | |
479 | (iucv_dbf_trace == NULL)) { | |
480 | iucv_unregister_dbf_views(); | |
481 | return -ENOMEM; | |
482 | } | |
483 | debug_register_view(iucv_dbf_setup, &debug_hex_ascii_view); | |
484 | debug_set_level(iucv_dbf_setup, IUCV_DBF_SETUP_LEVEL); | |
485 | ||
486 | debug_register_view(iucv_dbf_data, &debug_hex_ascii_view); | |
487 | debug_set_level(iucv_dbf_data, IUCV_DBF_DATA_LEVEL); | |
488 | ||
489 | debug_register_view(iucv_dbf_trace, &debug_hex_ascii_view); | |
490 | debug_set_level(iucv_dbf_trace, IUCV_DBF_TRACE_LEVEL); | |
491 | ||
492 | return 0; | |
493 | } | |
494 | ||
eebce385 | 495 | /* |
1da177e4 | 496 | * Callback-wrappers, called from lowlevel iucv layer. |
eebce385 | 497 | */ |
1da177e4 | 498 | |
eebce385 MS |
499 | static void netiucv_callback_rx(struct iucv_path *path, |
500 | struct iucv_message *msg) | |
1da177e4 | 501 | { |
eebce385 | 502 | struct iucv_connection *conn = path->private; |
1da177e4 LT |
503 | struct iucv_event ev; |
504 | ||
505 | ev.conn = conn; | |
eebce385 | 506 | ev.data = msg; |
1da177e4 LT |
507 | fsm_event(conn->fsm, CONN_EVENT_RX, &ev); |
508 | } | |
509 | ||
eebce385 MS |
510 | static void netiucv_callback_txdone(struct iucv_path *path, |
511 | struct iucv_message *msg) | |
1da177e4 | 512 | { |
eebce385 | 513 | struct iucv_connection *conn = path->private; |
1da177e4 LT |
514 | struct iucv_event ev; |
515 | ||
516 | ev.conn = conn; | |
eebce385 | 517 | ev.data = msg; |
1da177e4 LT |
518 | fsm_event(conn->fsm, CONN_EVENT_TXDONE, &ev); |
519 | } | |
520 | ||
eebce385 | 521 | static void netiucv_callback_connack(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 522 | { |
eebce385 | 523 | struct iucv_connection *conn = path->private; |
1da177e4 | 524 | |
eebce385 | 525 | fsm_event(conn->fsm, CONN_EVENT_CONN_ACK, conn); |
1da177e4 LT |
526 | } |
527 | ||
eebce385 MS |
528 | static int netiucv_callback_connreq(struct iucv_path *path, |
529 | u8 ipvmid[8], u8 ipuser[16]) | |
1da177e4 | 530 | { |
eebce385 | 531 | struct iucv_connection *conn = path->private; |
1da177e4 | 532 | struct iucv_event ev; |
eebce385 | 533 | int rc; |
1da177e4 | 534 | |
eebce385 MS |
535 | if (memcmp(iucvMagic, ipuser, sizeof(ipuser))) |
536 | /* ipuser must match iucvMagic. */ | |
537 | return -EINVAL; | |
538 | rc = -EINVAL; | |
539 | read_lock_bh(&iucv_connection_rwlock); | |
540 | list_for_each_entry(conn, &iucv_connection_list, list) { | |
541 | if (strncmp(ipvmid, conn->userid, 8)) | |
542 | continue; | |
543 | /* Found a matching connection for this path. */ | |
544 | conn->path = path; | |
545 | ev.conn = conn; | |
546 | ev.data = path; | |
547 | fsm_event(conn->fsm, CONN_EVENT_CONN_REQ, &ev); | |
548 | rc = 0; | |
549 | } | |
550 | read_unlock_bh(&iucv_connection_rwlock); | |
551 | return rc; | |
1da177e4 LT |
552 | } |
553 | ||
eebce385 | 554 | static void netiucv_callback_connrej(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 555 | { |
eebce385 | 556 | struct iucv_connection *conn = path->private; |
1da177e4 | 557 | |
eebce385 | 558 | fsm_event(conn->fsm, CONN_EVENT_CONN_REJ, conn); |
1da177e4 LT |
559 | } |
560 | ||
eebce385 | 561 | static void netiucv_callback_connsusp(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 562 | { |
eebce385 | 563 | struct iucv_connection *conn = path->private; |
1da177e4 | 564 | |
eebce385 | 565 | fsm_event(conn->fsm, CONN_EVENT_CONN_SUS, conn); |
1da177e4 LT |
566 | } |
567 | ||
eebce385 | 568 | static void netiucv_callback_connres(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 569 | { |
eebce385 | 570 | struct iucv_connection *conn = path->private; |
1da177e4 | 571 | |
eebce385 MS |
572 | fsm_event(conn->fsm, CONN_EVENT_CONN_RES, conn); |
573 | } | |
1da177e4 LT |
574 | |
575 | /** | |
21b26f2f | 576 | * NOP action for statemachines |
1da177e4 | 577 | */ |
21b26f2f | 578 | static void netiucv_action_nop(fsm_instance *fi, int event, void *arg) |
1da177e4 LT |
579 | { |
580 | } | |
e82b0f2c | 581 | |
eebce385 | 582 | /* |
1da177e4 | 583 | * Actions of the connection statemachine |
eebce385 | 584 | */ |
1da177e4 LT |
585 | |
586 | /** | |
eebce385 MS |
587 | * netiucv_unpack_skb |
588 | * @conn: The connection where this skb has been received. | |
589 | * @pskb: The received skb. | |
1da177e4 | 590 | * |
eebce385 MS |
591 | * Unpack a just received skb and hand it over to upper layers. |
592 | * Helper function for conn_action_rx. | |
1da177e4 | 593 | */ |
eebce385 MS |
594 | static void netiucv_unpack_skb(struct iucv_connection *conn, |
595 | struct sk_buff *pskb) | |
1da177e4 LT |
596 | { |
597 | struct net_device *dev = conn->netdev; | |
eebce385 MS |
598 | struct netiucv_priv *privptr = netdev_priv(dev); |
599 | u16 offset = 0; | |
1da177e4 LT |
600 | |
601 | skb_put(pskb, NETIUCV_HDRLEN); | |
602 | pskb->dev = dev; | |
603 | pskb->ip_summed = CHECKSUM_NONE; | |
604 | pskb->protocol = ntohs(ETH_P_IP); | |
605 | ||
606 | while (1) { | |
607 | struct sk_buff *skb; | |
eebce385 | 608 | struct ll_header *header = (struct ll_header *) pskb->data; |
1da177e4 LT |
609 | |
610 | if (!header->next) | |
611 | break; | |
612 | ||
613 | skb_pull(pskb, NETIUCV_HDRLEN); | |
614 | header->next -= offset; | |
615 | offset += header->next; | |
616 | header->next -= NETIUCV_HDRLEN; | |
617 | if (skb_tailroom(pskb) < header->next) { | |
618 | PRINT_WARN("%s: Illegal next field in iucv header: " | |
619 | "%d > %d\n", | |
620 | dev->name, header->next, skb_tailroom(pskb)); | |
621 | IUCV_DBF_TEXT_(data, 2, "Illegal next field: %d > %d\n", | |
622 | header->next, skb_tailroom(pskb)); | |
623 | return; | |
624 | } | |
625 | skb_put(pskb, header->next); | |
459a98ed | 626 | skb_reset_mac_header(pskb); |
1da177e4 LT |
627 | skb = dev_alloc_skb(pskb->len); |
628 | if (!skb) { | |
629 | PRINT_WARN("%s Out of memory in netiucv_unpack_skb\n", | |
630 | dev->name); | |
631 | IUCV_DBF_TEXT(data, 2, | |
632 | "Out of memory in netiucv_unpack_skb\n"); | |
633 | privptr->stats.rx_dropped++; | |
634 | return; | |
635 | } | |
d626f62b ACM |
636 | skb_copy_from_linear_data(pskb, skb_put(skb, pskb->len), |
637 | pskb->len); | |
459a98ed | 638 | skb_reset_mac_header(skb); |
1da177e4 LT |
639 | skb->dev = pskb->dev; |
640 | skb->protocol = pskb->protocol; | |
641 | pskb->ip_summed = CHECKSUM_UNNECESSARY; | |
9b3efc01 JL |
642 | privptr->stats.rx_packets++; |
643 | privptr->stats.rx_bytes += skb->len; | |
1da177e4 LT |
644 | /* |
645 | * Since receiving is always initiated from a tasklet (in iucv.c), | |
646 | * we must use netif_rx_ni() instead of netif_rx() | |
647 | */ | |
648 | netif_rx_ni(skb); | |
649 | dev->last_rx = jiffies; | |
1da177e4 LT |
650 | skb_pull(pskb, header->next); |
651 | skb_put(pskb, NETIUCV_HDRLEN); | |
652 | } | |
653 | } | |
654 | ||
eebce385 | 655 | static void conn_action_rx(fsm_instance *fi, int event, void *arg) |
1da177e4 | 656 | { |
eebce385 | 657 | struct iucv_event *ev = arg; |
1da177e4 | 658 | struct iucv_connection *conn = ev->conn; |
eebce385 MS |
659 | struct iucv_message *msg = ev->data; |
660 | struct netiucv_priv *privptr = netdev_priv(conn->netdev); | |
1da177e4 LT |
661 | int rc; |
662 | ||
663 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); | |
664 | ||
665 | if (!conn->netdev) { | |
eebce385 | 666 | iucv_message_reject(conn->path, msg); |
1da177e4 LT |
667 | PRINT_WARN("Received data for unlinked connection\n"); |
668 | IUCV_DBF_TEXT(data, 2, | |
eebce385 | 669 | "Received data for unlinked connection\n"); |
1da177e4 LT |
670 | return; |
671 | } | |
eebce385 MS |
672 | if (msg->length > conn->max_buffsize) { |
673 | iucv_message_reject(conn->path, msg); | |
1da177e4 LT |
674 | privptr->stats.rx_dropped++; |
675 | PRINT_WARN("msglen %d > max_buffsize %d\n", | |
eebce385 | 676 | msg->length, conn->max_buffsize); |
1da177e4 | 677 | IUCV_DBF_TEXT_(data, 2, "msglen %d > max_buffsize %d\n", |
eebce385 | 678 | msg->length, conn->max_buffsize); |
1da177e4 LT |
679 | return; |
680 | } | |
27a884dc ACM |
681 | conn->rx_buff->data = conn->rx_buff->head; |
682 | skb_reset_tail_pointer(conn->rx_buff); | |
1da177e4 | 683 | conn->rx_buff->len = 0; |
eebce385 MS |
684 | rc = iucv_message_receive(conn->path, msg, 0, conn->rx_buff->data, |
685 | msg->length, NULL); | |
686 | if (rc || msg->length < 5) { | |
1da177e4 LT |
687 | privptr->stats.rx_errors++; |
688 | PRINT_WARN("iucv_receive returned %08x\n", rc); | |
689 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_receive\n", rc); | |
690 | return; | |
691 | } | |
692 | netiucv_unpack_skb(conn, conn->rx_buff); | |
693 | } | |
694 | ||
eebce385 | 695 | static void conn_action_txdone(fsm_instance *fi, int event, void *arg) |
1da177e4 | 696 | { |
eebce385 | 697 | struct iucv_event *ev = arg; |
1da177e4 | 698 | struct iucv_connection *conn = ev->conn; |
eebce385 MS |
699 | struct iucv_message *msg = ev->data; |
700 | struct iucv_message txmsg; | |
1da177e4 | 701 | struct netiucv_priv *privptr = NULL; |
eebce385 MS |
702 | u32 single_flag = msg->tag; |
703 | u32 txbytes = 0; | |
704 | u32 txpackets = 0; | |
705 | u32 stat_maxcq = 0; | |
1da177e4 LT |
706 | struct sk_buff *skb; |
707 | unsigned long saveflags; | |
eebce385 MS |
708 | struct ll_header header; |
709 | int rc; | |
1da177e4 LT |
710 | |
711 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); | |
712 | ||
eebce385 MS |
713 | if (conn && conn->netdev) |
714 | privptr = netdev_priv(conn->netdev); | |
1da177e4 LT |
715 | conn->prof.tx_pending--; |
716 | if (single_flag) { | |
717 | if ((skb = skb_dequeue(&conn->commit_queue))) { | |
718 | atomic_dec(&skb->users); | |
719 | dev_kfree_skb_any(skb); | |
720 | if (privptr) { | |
721 | privptr->stats.tx_packets++; | |
722 | privptr->stats.tx_bytes += | |
723 | (skb->len - NETIUCV_HDRLEN | |
724 | - NETIUCV_HDRLEN); | |
725 | } | |
726 | } | |
727 | } | |
27a884dc ACM |
728 | conn->tx_buff->data = conn->tx_buff->head; |
729 | skb_reset_tail_pointer(conn->tx_buff); | |
1da177e4 LT |
730 | conn->tx_buff->len = 0; |
731 | spin_lock_irqsave(&conn->collect_lock, saveflags); | |
732 | while ((skb = skb_dequeue(&conn->collect_queue))) { | |
733 | header.next = conn->tx_buff->len + skb->len + NETIUCV_HDRLEN; | |
734 | memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, | |
735 | NETIUCV_HDRLEN); | |
d626f62b ACM |
736 | skb_copy_from_linear_data(skb, |
737 | skb_put(conn->tx_buff, skb->len), | |
738 | skb->len); | |
1da177e4 LT |
739 | txbytes += skb->len; |
740 | txpackets++; | |
741 | stat_maxcq++; | |
742 | atomic_dec(&skb->users); | |
743 | dev_kfree_skb_any(skb); | |
744 | } | |
745 | if (conn->collect_len > conn->prof.maxmulti) | |
746 | conn->prof.maxmulti = conn->collect_len; | |
747 | conn->collect_len = 0; | |
748 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); | |
eebce385 MS |
749 | if (conn->tx_buff->len == 0) { |
750 | fsm_newstate(fi, CONN_STATE_IDLE); | |
751 | return; | |
752 | } | |
1da177e4 | 753 | |
eebce385 MS |
754 | header.next = 0; |
755 | memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
2c6b47de | 756 | conn->prof.send_stamp = current_kernel_time(); |
eebce385 MS |
757 | txmsg.class = 0; |
758 | txmsg.tag = 0; | |
759 | rc = iucv_message_send(conn->path, &txmsg, 0, 0, | |
1da177e4 | 760 | conn->tx_buff->data, conn->tx_buff->len); |
eebce385 MS |
761 | conn->prof.doios_multi++; |
762 | conn->prof.txlen += conn->tx_buff->len; | |
763 | conn->prof.tx_pending++; | |
764 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) | |
765 | conn->prof.tx_max_pending = conn->prof.tx_pending; | |
766 | if (rc) { | |
767 | conn->prof.tx_pending--; | |
1da177e4 | 768 | fsm_newstate(fi, CONN_STATE_IDLE); |
eebce385 MS |
769 | if (privptr) |
770 | privptr->stats.tx_errors += txpackets; | |
771 | PRINT_WARN("iucv_send returned %08x\n", rc); | |
772 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); | |
773 | } else { | |
774 | if (privptr) { | |
775 | privptr->stats.tx_packets += txpackets; | |
776 | privptr->stats.tx_bytes += txbytes; | |
777 | } | |
778 | if (stat_maxcq > conn->prof.maxcqueue) | |
779 | conn->prof.maxcqueue = stat_maxcq; | |
780 | } | |
1da177e4 LT |
781 | } |
782 | ||
eebce385 | 783 | static void conn_action_connaccept(fsm_instance *fi, int event, void *arg) |
1da177e4 | 784 | { |
eebce385 | 785 | struct iucv_event *ev = arg; |
1da177e4 | 786 | struct iucv_connection *conn = ev->conn; |
eebce385 | 787 | struct iucv_path *path = ev->data; |
1da177e4 | 788 | struct net_device *netdev = conn->netdev; |
eebce385 | 789 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 790 | int rc; |
1da177e4 LT |
791 | |
792 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
793 | ||
eebce385 MS |
794 | conn->path = path; |
795 | path->msglim = NETIUCV_QUEUELEN_DEFAULT; | |
796 | path->flags = 0; | |
797 | rc = iucv_path_accept(path, &netiucv_handler, NULL, conn); | |
1da177e4 LT |
798 | if (rc) { |
799 | PRINT_WARN("%s: IUCV accept failed with error %d\n", | |
800 | netdev->name, rc); | |
801 | IUCV_DBF_TEXT_(setup, 2, "rc %d from iucv_accept", rc); | |
802 | return; | |
803 | } | |
804 | fsm_newstate(fi, CONN_STATE_IDLE); | |
eebce385 | 805 | netdev->tx_queue_len = conn->path->msglim; |
1da177e4 LT |
806 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); |
807 | } | |
808 | ||
eebce385 | 809 | static void conn_action_connreject(fsm_instance *fi, int event, void *arg) |
1da177e4 | 810 | { |
eebce385 MS |
811 | struct iucv_event *ev = arg; |
812 | struct iucv_path *path = ev->data; | |
1da177e4 LT |
813 | |
814 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
eebce385 | 815 | iucv_path_sever(path, NULL); |
1da177e4 LT |
816 | } |
817 | ||
eebce385 | 818 | static void conn_action_connack(fsm_instance *fi, int event, void *arg) |
1da177e4 | 819 | { |
eebce385 | 820 | struct iucv_connection *conn = arg; |
1da177e4 | 821 | struct net_device *netdev = conn->netdev; |
eebce385 | 822 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 LT |
823 | |
824 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1da177e4 LT |
825 | fsm_deltimer(&conn->timer); |
826 | fsm_newstate(fi, CONN_STATE_IDLE); | |
eebce385 | 827 | netdev->tx_queue_len = conn->path->msglim; |
1da177e4 LT |
828 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); |
829 | } | |
830 | ||
eebce385 | 831 | static void conn_action_conntimsev(fsm_instance *fi, int event, void *arg) |
1da177e4 | 832 | { |
eebce385 | 833 | struct iucv_connection *conn = arg; |
1da177e4 LT |
834 | |
835 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1da177e4 | 836 | fsm_deltimer(&conn->timer); |
eebce385 | 837 | iucv_path_sever(conn->path, NULL); |
1da177e4 LT |
838 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
839 | } | |
840 | ||
eebce385 | 841 | static void conn_action_connsever(fsm_instance *fi, int event, void *arg) |
1da177e4 | 842 | { |
eebce385 | 843 | struct iucv_connection *conn = arg; |
1da177e4 | 844 | struct net_device *netdev = conn->netdev; |
eebce385 | 845 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 LT |
846 | |
847 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
848 | ||
849 | fsm_deltimer(&conn->timer); | |
eebce385 | 850 | iucv_path_sever(conn->path, NULL); |
1da177e4 LT |
851 | PRINT_INFO("%s: Remote dropped connection\n", netdev->name); |
852 | IUCV_DBF_TEXT(data, 2, | |
eebce385 | 853 | "conn_action_connsever: Remote dropped connection\n"); |
1da177e4 LT |
854 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
855 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); | |
856 | } | |
857 | ||
eebce385 | 858 | static void conn_action_start(fsm_instance *fi, int event, void *arg) |
1da177e4 | 859 | { |
eebce385 | 860 | struct iucv_connection *conn = arg; |
1da177e4 LT |
861 | int rc; |
862 | ||
863 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
864 | ||
eebce385 | 865 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
1da177e4 | 866 | PRINT_DEBUG("%s('%s'): connecting ...\n", |
eebce385 | 867 | conn->netdev->name, conn->userid); |
1da177e4 | 868 | |
eebce385 MS |
869 | /* |
870 | * We must set the state before calling iucv_connect because the | |
871 | * callback handler could be called at any point after the connection | |
872 | * request is sent | |
873 | */ | |
1da177e4 LT |
874 | |
875 | fsm_newstate(fi, CONN_STATE_SETUPWAIT); | |
eebce385 MS |
876 | conn->path = iucv_path_alloc(NETIUCV_QUEUELEN_DEFAULT, 0, GFP_KERNEL); |
877 | rc = iucv_path_connect(conn->path, &netiucv_handler, conn->userid, | |
878 | NULL, iucvMagic, conn); | |
1da177e4 | 879 | switch (rc) { |
eebce385 MS |
880 | case 0: |
881 | conn->netdev->tx_queue_len = conn->path->msglim; | |
882 | fsm_addtimer(&conn->timer, NETIUCV_TIMEOUT_5SEC, | |
883 | CONN_EVENT_TIMER, conn); | |
884 | return; | |
885 | case 11: | |
886 | PRINT_INFO("%s: User %s is currently not available.\n", | |
887 | conn->netdev->name, | |
888 | netiucv_printname(conn->userid)); | |
889 | fsm_newstate(fi, CONN_STATE_STARTWAIT); | |
890 | break; | |
891 | case 12: | |
892 | PRINT_INFO("%s: User %s is currently not ready.\n", | |
893 | conn->netdev->name, | |
894 | netiucv_printname(conn->userid)); | |
895 | fsm_newstate(fi, CONN_STATE_STARTWAIT); | |
896 | break; | |
897 | case 13: | |
898 | PRINT_WARN("%s: Too many IUCV connections.\n", | |
899 | conn->netdev->name); | |
900 | fsm_newstate(fi, CONN_STATE_CONNERR); | |
901 | break; | |
902 | case 14: | |
903 | PRINT_WARN("%s: User %s has too many IUCV connections.\n", | |
904 | conn->netdev->name, | |
905 | netiucv_printname(conn->userid)); | |
906 | fsm_newstate(fi, CONN_STATE_CONNERR); | |
907 | break; | |
908 | case 15: | |
909 | PRINT_WARN("%s: No IUCV authorization in CP directory.\n", | |
910 | conn->netdev->name); | |
911 | fsm_newstate(fi, CONN_STATE_CONNERR); | |
912 | break; | |
913 | default: | |
914 | PRINT_WARN("%s: iucv_connect returned error %d\n", | |
915 | conn->netdev->name, rc); | |
916 | fsm_newstate(fi, CONN_STATE_CONNERR); | |
917 | break; | |
1da177e4 LT |
918 | } |
919 | IUCV_DBF_TEXT_(setup, 5, "iucv_connect rc is %d\n", rc); | |
eebce385 MS |
920 | kfree(conn->path); |
921 | conn->path = NULL; | |
1da177e4 LT |
922 | } |
923 | ||
eebce385 | 924 | static void netiucv_purge_skb_queue(struct sk_buff_head *q) |
1da177e4 LT |
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 | ||
eebce385 | 934 | static void conn_action_stop(fsm_instance *fi, int event, void *arg) |
1da177e4 | 935 | { |
eebce385 | 936 | struct iucv_event *ev = arg; |
1da177e4 LT |
937 | struct iucv_connection *conn = ev->conn; |
938 | struct net_device *netdev = conn->netdev; | |
eebce385 | 939 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 LT |
940 | |
941 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
942 | ||
943 | fsm_deltimer(&conn->timer); | |
944 | fsm_newstate(fi, CONN_STATE_STOPPED); | |
945 | netiucv_purge_skb_queue(&conn->collect_queue); | |
eebce385 MS |
946 | if (conn->path) { |
947 | IUCV_DBF_TEXT(trace, 5, "calling iucv_path_sever\n"); | |
948 | iucv_path_sever(conn->path, iucvMagic); | |
949 | kfree(conn->path); | |
950 | conn->path = NULL; | |
951 | } | |
1da177e4 LT |
952 | netiucv_purge_skb_queue(&conn->commit_queue); |
953 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); | |
954 | } | |
955 | ||
eebce385 | 956 | static void conn_action_inval(fsm_instance *fi, int event, void *arg) |
1da177e4 | 957 | { |
eebce385 | 958 | struct iucv_connection *conn = arg; |
1da177e4 LT |
959 | struct net_device *netdev = conn->netdev; |
960 | ||
eebce385 | 961 | PRINT_WARN("%s: Cannot connect without username\n", netdev->name); |
1da177e4 LT |
962 | IUCV_DBF_TEXT(data, 2, "conn_action_inval called\n"); |
963 | } | |
964 | ||
965 | static const fsm_node conn_fsm[] = { | |
966 | { CONN_STATE_INVALID, CONN_EVENT_START, conn_action_inval }, | |
967 | { CONN_STATE_STOPPED, CONN_EVENT_START, conn_action_start }, | |
968 | ||
969 | { CONN_STATE_STOPPED, CONN_EVENT_STOP, conn_action_stop }, | |
970 | { CONN_STATE_STARTWAIT, CONN_EVENT_STOP, conn_action_stop }, | |
971 | { CONN_STATE_SETUPWAIT, CONN_EVENT_STOP, conn_action_stop }, | |
972 | { CONN_STATE_IDLE, CONN_EVENT_STOP, conn_action_stop }, | |
973 | { CONN_STATE_TX, CONN_EVENT_STOP, conn_action_stop }, | |
974 | { CONN_STATE_REGERR, CONN_EVENT_STOP, conn_action_stop }, | |
975 | { CONN_STATE_CONNERR, CONN_EVENT_STOP, conn_action_stop }, | |
976 | ||
977 | { CONN_STATE_STOPPED, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
978 | { CONN_STATE_STARTWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, | |
979 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, | |
980 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
981 | { CONN_STATE_TX, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
982 | ||
983 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_ACK, conn_action_connack }, | |
984 | { CONN_STATE_SETUPWAIT, CONN_EVENT_TIMER, conn_action_conntimsev }, | |
985 | ||
986 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
987 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
988 | { CONN_STATE_TX, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
989 | ||
990 | { CONN_STATE_IDLE, CONN_EVENT_RX, conn_action_rx }, | |
991 | { CONN_STATE_TX, CONN_EVENT_RX, conn_action_rx }, | |
992 | ||
993 | { CONN_STATE_TX, CONN_EVENT_TXDONE, conn_action_txdone }, | |
994 | { CONN_STATE_IDLE, CONN_EVENT_TXDONE, conn_action_txdone }, | |
995 | }; | |
996 | ||
997 | static const int CONN_FSM_LEN = sizeof(conn_fsm) / sizeof(fsm_node); | |
998 | ||
e82b0f2c | 999 | |
eebce385 | 1000 | /* |
1da177e4 | 1001 | * Actions for interface - statemachine. |
eebce385 | 1002 | */ |
1da177e4 LT |
1003 | |
1004 | /** | |
eebce385 MS |
1005 | * dev_action_start |
1006 | * @fi: An instance of an interface statemachine. | |
1007 | * @event: The event, just happened. | |
1008 | * @arg: Generic pointer, casted from struct net_device * upon call. | |
1da177e4 | 1009 | * |
eebce385 | 1010 | * Startup connection by sending CONN_EVENT_START to it. |
1da177e4 | 1011 | */ |
eebce385 | 1012 | static void dev_action_start(fsm_instance *fi, int event, void *arg) |
1da177e4 | 1013 | { |
eebce385 MS |
1014 | struct net_device *dev = arg; |
1015 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 LT |
1016 | |
1017 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1018 | ||
1da177e4 | 1019 | fsm_newstate(fi, DEV_STATE_STARTWAIT); |
eebce385 | 1020 | fsm_event(privptr->conn->fsm, CONN_EVENT_START, privptr->conn); |
1da177e4 LT |
1021 | } |
1022 | ||
1023 | /** | |
1024 | * Shutdown connection by sending CONN_EVENT_STOP to it. | |
1025 | * | |
1026 | * @param fi An instance of an interface statemachine. | |
1027 | * @param event The event, just happened. | |
1028 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1029 | */ | |
1030 | static void | |
1031 | dev_action_stop(fsm_instance *fi, int event, void *arg) | |
1032 | { | |
eebce385 MS |
1033 | struct net_device *dev = arg; |
1034 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 LT |
1035 | struct iucv_event ev; |
1036 | ||
1037 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1038 | ||
1039 | ev.conn = privptr->conn; | |
1040 | ||
1041 | fsm_newstate(fi, DEV_STATE_STOPWAIT); | |
1042 | fsm_event(privptr->conn->fsm, CONN_EVENT_STOP, &ev); | |
1043 | } | |
1044 | ||
1045 | /** | |
1046 | * Called from connection statemachine | |
1047 | * when a connection is up and running. | |
1048 | * | |
1049 | * @param fi An instance of an interface statemachine. | |
1050 | * @param event The event, just happened. | |
1051 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1052 | */ | |
1053 | static void | |
1054 | dev_action_connup(fsm_instance *fi, int event, void *arg) | |
1055 | { | |
eebce385 MS |
1056 | struct net_device *dev = arg; |
1057 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 LT |
1058 | |
1059 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1060 | ||
1061 | switch (fsm_getstate(fi)) { | |
1062 | case DEV_STATE_STARTWAIT: | |
1063 | fsm_newstate(fi, DEV_STATE_RUNNING); | |
1064 | PRINT_INFO("%s: connected with remote side %s\n", | |
1065 | dev->name, privptr->conn->userid); | |
1066 | IUCV_DBF_TEXT(setup, 3, | |
1067 | "connection is up and running\n"); | |
1068 | break; | |
1069 | case DEV_STATE_STOPWAIT: | |
1070 | PRINT_INFO( | |
1071 | "%s: got connection UP event during shutdown!\n", | |
1072 | dev->name); | |
1073 | IUCV_DBF_TEXT(data, 2, | |
1074 | "dev_action_connup: in DEV_STATE_STOPWAIT\n"); | |
1075 | break; | |
1076 | } | |
1077 | } | |
1078 | ||
1079 | /** | |
1080 | * Called from connection statemachine | |
1081 | * when a connection has been shutdown. | |
1082 | * | |
1083 | * @param fi An instance of an interface statemachine. | |
1084 | * @param event The event, just happened. | |
1085 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1086 | */ | |
1087 | static void | |
1088 | dev_action_conndown(fsm_instance *fi, int event, void *arg) | |
1089 | { | |
1090 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1091 | ||
1092 | switch (fsm_getstate(fi)) { | |
1093 | case DEV_STATE_RUNNING: | |
1094 | fsm_newstate(fi, DEV_STATE_STARTWAIT); | |
1095 | break; | |
1096 | case DEV_STATE_STOPWAIT: | |
1097 | fsm_newstate(fi, DEV_STATE_STOPPED); | |
1098 | IUCV_DBF_TEXT(setup, 3, "connection is down\n"); | |
1099 | break; | |
1100 | } | |
1101 | } | |
1102 | ||
1103 | static const fsm_node dev_fsm[] = { | |
1104 | { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start }, | |
1105 | ||
1106 | { DEV_STATE_STOPWAIT, DEV_EVENT_START, dev_action_start }, | |
1107 | { DEV_STATE_STOPWAIT, DEV_EVENT_CONDOWN, dev_action_conndown }, | |
1108 | ||
1109 | { DEV_STATE_STARTWAIT, DEV_EVENT_STOP, dev_action_stop }, | |
1110 | { DEV_STATE_STARTWAIT, DEV_EVENT_CONUP, dev_action_connup }, | |
1111 | ||
1112 | { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop }, | |
1113 | { DEV_STATE_RUNNING, DEV_EVENT_CONDOWN, dev_action_conndown }, | |
21b26f2f | 1114 | { DEV_STATE_RUNNING, DEV_EVENT_CONUP, netiucv_action_nop }, |
1da177e4 LT |
1115 | }; |
1116 | ||
1117 | static const int DEV_FSM_LEN = sizeof(dev_fsm) / sizeof(fsm_node); | |
1118 | ||
1119 | /** | |
1120 | * Transmit a packet. | |
1121 | * This is a helper function for netiucv_tx(). | |
1122 | * | |
1123 | * @param conn Connection to be used for sending. | |
1124 | * @param skb Pointer to struct sk_buff of packet to send. | |
1125 | * The linklevel header has already been set up | |
1126 | * by netiucv_tx(). | |
1127 | * | |
1128 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1129 | */ | |
eebce385 MS |
1130 | static int netiucv_transmit_skb(struct iucv_connection *conn, |
1131 | struct sk_buff *skb) | |
1132 | { | |
1133 | struct iucv_message msg; | |
1da177e4 | 1134 | unsigned long saveflags; |
eebce385 MS |
1135 | struct ll_header header; |
1136 | int rc; | |
1da177e4 LT |
1137 | |
1138 | if (fsm_getstate(conn->fsm) != CONN_STATE_IDLE) { | |
1139 | int l = skb->len + NETIUCV_HDRLEN; | |
1140 | ||
1141 | spin_lock_irqsave(&conn->collect_lock, saveflags); | |
1142 | if (conn->collect_len + l > | |
1143 | (conn->max_buffsize - NETIUCV_HDRLEN)) { | |
1144 | rc = -EBUSY; | |
1145 | IUCV_DBF_TEXT(data, 2, | |
eebce385 | 1146 | "EBUSY from netiucv_transmit_skb\n"); |
1da177e4 LT |
1147 | } else { |
1148 | atomic_inc(&skb->users); | |
1149 | skb_queue_tail(&conn->collect_queue, skb); | |
1150 | conn->collect_len += l; | |
eebce385 | 1151 | rc = 0; |
1da177e4 LT |
1152 | } |
1153 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); | |
1154 | } else { | |
1155 | struct sk_buff *nskb = skb; | |
1156 | /** | |
1157 | * Copy the skb to a new allocated skb in lowmem only if the | |
1158 | * data is located above 2G in memory or tailroom is < 2. | |
1159 | */ | |
27a884dc ACM |
1160 | unsigned long hi = ((unsigned long)(skb_tail_pointer(skb) + |
1161 | NETIUCV_HDRLEN)) >> 31; | |
1da177e4 LT |
1162 | int copied = 0; |
1163 | if (hi || (skb_tailroom(skb) < 2)) { | |
1164 | nskb = alloc_skb(skb->len + NETIUCV_HDRLEN + | |
1165 | NETIUCV_HDRLEN, GFP_ATOMIC | GFP_DMA); | |
1166 | if (!nskb) { | |
1167 | PRINT_WARN("%s: Could not allocate tx_skb\n", | |
1168 | conn->netdev->name); | |
1169 | IUCV_DBF_TEXT(data, 2, "alloc_skb failed\n"); | |
1170 | rc = -ENOMEM; | |
1171 | return rc; | |
1172 | } else { | |
1173 | skb_reserve(nskb, NETIUCV_HDRLEN); | |
1174 | memcpy(skb_put(nskb, skb->len), | |
1175 | skb->data, skb->len); | |
1176 | } | |
1177 | copied = 1; | |
1178 | } | |
1179 | /** | |
1180 | * skb now is below 2G and has enough room. Add headers. | |
1181 | */ | |
1182 | header.next = nskb->len + NETIUCV_HDRLEN; | |
1183 | memcpy(skb_push(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
1184 | header.next = 0; | |
1185 | memcpy(skb_put(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
1186 | ||
1187 | fsm_newstate(conn->fsm, CONN_STATE_TX); | |
2c6b47de | 1188 | conn->prof.send_stamp = current_kernel_time(); |
e82b0f2c | 1189 | |
eebce385 MS |
1190 | msg.tag = 1; |
1191 | msg.class = 0; | |
1192 | rc = iucv_message_send(conn->path, &msg, 0, 0, | |
1193 | nskb->data, nskb->len); | |
1da177e4 LT |
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--; | |
eebce385 | 1203 | privptr = netdev_priv(conn->netdev); |
1da177e4 LT |
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 | |
eebce385 | 1229 | /* |
1da177e4 | 1230 | * Interface API for upper network layers |
eebce385 | 1231 | */ |
1da177e4 LT |
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 | */ | |
eebce385 MS |
1241 | static int netiucv_open(struct net_device *dev) |
1242 | { | |
1243 | struct netiucv_priv *priv = netdev_priv(dev); | |
1244 | ||
1245 | fsm_event(priv->fsm, DEV_EVENT_START, dev); | |
1da177e4 LT |
1246 | return 0; |
1247 | } | |
1248 | ||
1249 | /** | |
1250 | * Close an interface. | |
1251 | * Called from generic network layer when ifconfig down is run. | |
1252 | * | |
1253 | * @param dev Pointer to interface struct. | |
1254 | * | |
1255 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1256 | */ | |
eebce385 MS |
1257 | static int netiucv_close(struct net_device *dev) |
1258 | { | |
1259 | struct netiucv_priv *priv = netdev_priv(dev); | |
1260 | ||
1261 | fsm_event(priv->fsm, DEV_EVENT_STOP, dev); | |
1da177e4 LT |
1262 | return 0; |
1263 | } | |
1264 | ||
1265 | /** | |
1266 | * Start transmission of a packet. | |
1267 | * Called from generic network device layer. | |
1268 | * | |
1269 | * @param skb Pointer to buffer containing the packet. | |
1270 | * @param dev Pointer to interface struct. | |
1271 | * | |
1272 | * @return 0 if packet consumed, !0 if packet rejected. | |
1273 | * Note: If we return !0, then the packet is free'd by | |
1274 | * the generic network layer. | |
1275 | */ | |
1276 | static int netiucv_tx(struct sk_buff *skb, struct net_device *dev) | |
1277 | { | |
eebce385 MS |
1278 | struct netiucv_priv *privptr = netdev_priv(dev); |
1279 | int rc; | |
1da177e4 LT |
1280 | |
1281 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); | |
1282 | /** | |
1283 | * Some sanity checks ... | |
1284 | */ | |
1285 | if (skb == NULL) { | |
1286 | PRINT_WARN("%s: NULL sk_buff passed\n", dev->name); | |
1287 | IUCV_DBF_TEXT(data, 2, "netiucv_tx: skb is NULL\n"); | |
1288 | privptr->stats.tx_dropped++; | |
1289 | return 0; | |
1290 | } | |
1291 | if (skb_headroom(skb) < NETIUCV_HDRLEN) { | |
1292 | PRINT_WARN("%s: Got sk_buff with head room < %ld bytes\n", | |
1293 | dev->name, NETIUCV_HDRLEN); | |
1294 | IUCV_DBF_TEXT(data, 2, | |
1295 | "netiucv_tx: skb_headroom < NETIUCV_HDRLEN\n"); | |
1296 | dev_kfree_skb(skb); | |
1297 | privptr->stats.tx_dropped++; | |
1298 | return 0; | |
1299 | } | |
1300 | ||
1301 | /** | |
1302 | * If connection is not running, try to restart it | |
e82b0f2c | 1303 | * and throw away packet. |
1da177e4 LT |
1304 | */ |
1305 | if (fsm_getstate(privptr->fsm) != DEV_STATE_RUNNING) { | |
651bbc62 UB |
1306 | if (!in_atomic()) |
1307 | fsm_event(privptr->fsm, DEV_EVENT_START, dev); | |
1da177e4 LT |
1308 | dev_kfree_skb(skb); |
1309 | privptr->stats.tx_dropped++; | |
1310 | privptr->stats.tx_errors++; | |
1311 | privptr->stats.tx_carrier_errors++; | |
1312 | return 0; | |
1313 | } | |
1314 | ||
1315 | if (netiucv_test_and_set_busy(dev)) { | |
1316 | IUCV_DBF_TEXT(data, 2, "EBUSY from netiucv_tx\n"); | |
1317 | return -EBUSY; | |
1318 | } | |
1319 | dev->trans_start = jiffies; | |
eebce385 | 1320 | rc = netiucv_transmit_skb(privptr->conn, skb) != 0; |
1da177e4 LT |
1321 | netiucv_clear_busy(dev); |
1322 | return rc; | |
1323 | } | |
1324 | ||
1325 | /** | |
eebce385 MS |
1326 | * netiucv_stats |
1327 | * @dev: Pointer to interface struct. | |
1da177e4 | 1328 | * |
eebce385 | 1329 | * Returns interface statistics of a device. |
1da177e4 | 1330 | * |
eebce385 | 1331 | * Returns pointer to stats struct of this interface. |
1da177e4 | 1332 | */ |
eebce385 | 1333 | static struct net_device_stats *netiucv_stats (struct net_device * dev) |
1da177e4 | 1334 | { |
eebce385 MS |
1335 | struct netiucv_priv *priv = netdev_priv(dev); |
1336 | ||
1da177e4 | 1337 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); |
eebce385 | 1338 | return &priv->stats; |
1da177e4 LT |
1339 | } |
1340 | ||
1341 | /** | |
eebce385 MS |
1342 | * netiucv_change_mtu |
1343 | * @dev: Pointer to interface struct. | |
1344 | * @new_mtu: The new MTU to use for this interface. | |
1da177e4 | 1345 | * |
eebce385 | 1346 | * Sets MTU of an interface. |
1da177e4 | 1347 | * |
eebce385 | 1348 | * Returns 0 on success, -EINVAL if MTU is out of valid range. |
1da177e4 LT |
1349 | * (valid range is 576 .. NETIUCV_MTU_MAX). |
1350 | */ | |
eebce385 | 1351 | static int netiucv_change_mtu(struct net_device * dev, int new_mtu) |
1da177e4 LT |
1352 | { |
1353 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
eebce385 | 1354 | if (new_mtu < 576 || new_mtu > NETIUCV_MTU_MAX) { |
1da177e4 LT |
1355 | IUCV_DBF_TEXT(setup, 2, "given MTU out of valid range\n"); |
1356 | return -EINVAL; | |
1357 | } | |
1358 | dev->mtu = new_mtu; | |
1359 | return 0; | |
1360 | } | |
1361 | ||
eebce385 | 1362 | /* |
1da177e4 | 1363 | * attributes in sysfs |
eebce385 | 1364 | */ |
1da177e4 | 1365 | |
eebce385 MS |
1366 | static ssize_t user_show(struct device *dev, struct device_attribute *attr, |
1367 | char *buf) | |
1da177e4 LT |
1368 | { |
1369 | struct netiucv_priv *priv = dev->driver_data; | |
1370 | ||
1371 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1372 | return sprintf(buf, "%s\n", netiucv_printname(priv->conn->userid)); | |
1373 | } | |
1374 | ||
eebce385 MS |
1375 | static ssize_t user_write(struct device *dev, struct device_attribute *attr, |
1376 | const char *buf, size_t count) | |
1da177e4 LT |
1377 | { |
1378 | struct netiucv_priv *priv = dev->driver_data; | |
1379 | struct net_device *ndev = priv->conn->netdev; | |
1380 | char *p; | |
1381 | char *tmp; | |
16a83b30 | 1382 | char username[9]; |
1da177e4 | 1383 | int i; |
eebce385 | 1384 | struct iucv_connection *cp; |
1da177e4 LT |
1385 | |
1386 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
eebce385 MS |
1387 | if (count > 9) { |
1388 | PRINT_WARN("netiucv: username too long (%d)!\n", (int) count); | |
1da177e4 | 1389 | IUCV_DBF_TEXT_(setup, 2, |
eebce385 | 1390 | "%d is length of username\n", (int) count); |
1da177e4 LT |
1391 | return -EINVAL; |
1392 | } | |
1393 | ||
1394 | tmp = strsep((char **) &buf, "\n"); | |
eebce385 MS |
1395 | for (i = 0, p = tmp; i < 8 && *p; i++, p++) { |
1396 | if (isalnum(*p) || (*p == '$')) { | |
16a83b30 | 1397 | username[i]= toupper(*p); |
eebce385 MS |
1398 | continue; |
1399 | } | |
1400 | if (*p == '\n') { | |
1da177e4 LT |
1401 | /* trailing lf, grr */ |
1402 | break; | |
1da177e4 | 1403 | } |
eebce385 MS |
1404 | PRINT_WARN("netiucv: Invalid char %c in username!\n", *p); |
1405 | IUCV_DBF_TEXT_(setup, 2, | |
1406 | "username: invalid character %c\n", *p); | |
1407 | return -EINVAL; | |
1da177e4 | 1408 | } |
eebce385 | 1409 | while (i < 8) |
1da177e4 | 1410 | username[i++] = ' '; |
16a83b30 | 1411 | username[8] = '\0'; |
1da177e4 | 1412 | |
eebce385 MS |
1413 | if (memcmp(username, priv->conn->userid, 9) && |
1414 | (ndev->flags & (IFF_UP | IFF_RUNNING))) { | |
1415 | /* username changed while the interface is active. */ | |
1416 | PRINT_WARN("netiucv: device %s active, connected to %s\n", | |
1417 | dev->bus_id, priv->conn->userid); | |
1418 | PRINT_WARN("netiucv: user cannot be updated\n"); | |
1419 | IUCV_DBF_TEXT(setup, 2, "user_write: device active\n"); | |
1420 | return -EBUSY; | |
1421 | } | |
1422 | read_lock_bh(&iucv_connection_rwlock); | |
1423 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
1424 | if (!strncmp(username, cp->userid, 9) && cp->netdev != ndev) { | |
1425 | read_unlock_bh(&iucv_connection_rwlock); | |
1426 | PRINT_WARN("netiucv: Connection to %s already " | |
1427 | "exists\n", username); | |
1428 | return -EEXIST; | |
1da177e4 LT |
1429 | } |
1430 | } | |
eebce385 | 1431 | read_unlock_bh(&iucv_connection_rwlock); |
1da177e4 | 1432 | memcpy(priv->conn->userid, username, 9); |
1da177e4 | 1433 | return count; |
1da177e4 LT |
1434 | } |
1435 | ||
1436 | static DEVICE_ATTR(user, 0644, user_show, user_write); | |
1437 | ||
eebce385 MS |
1438 | static ssize_t buffer_show (struct device *dev, struct device_attribute *attr, |
1439 | char *buf) | |
1440 | { struct netiucv_priv *priv = dev->driver_data; | |
1da177e4 LT |
1441 | |
1442 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1443 | return sprintf(buf, "%d\n", priv->conn->max_buffsize); | |
1444 | } | |
1445 | ||
eebce385 MS |
1446 | static ssize_t buffer_write (struct device *dev, struct device_attribute *attr, |
1447 | const char *buf, size_t count) | |
1da177e4 LT |
1448 | { |
1449 | struct netiucv_priv *priv = dev->driver_data; | |
1450 | struct net_device *ndev = priv->conn->netdev; | |
1451 | char *e; | |
1452 | int bs1; | |
1453 | ||
1454 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1455 | if (count >= 39) | |
1456 | return -EINVAL; | |
1457 | ||
1458 | bs1 = simple_strtoul(buf, &e, 0); | |
1459 | ||
1460 | if (e && (!isspace(*e))) { | |
1461 | PRINT_WARN("netiucv: Invalid character in buffer!\n"); | |
1462 | IUCV_DBF_TEXT_(setup, 2, "buffer_write: invalid char %c\n", *e); | |
1463 | return -EINVAL; | |
1464 | } | |
1465 | if (bs1 > NETIUCV_BUFSIZE_MAX) { | |
1466 | PRINT_WARN("netiucv: Given buffer size %d too large.\n", | |
1467 | bs1); | |
1468 | IUCV_DBF_TEXT_(setup, 2, | |
1469 | "buffer_write: buffer size %d too large\n", | |
1470 | bs1); | |
1471 | return -EINVAL; | |
1472 | } | |
1473 | if ((ndev->flags & IFF_RUNNING) && | |
1474 | (bs1 < (ndev->mtu + NETIUCV_HDRLEN + 2))) { | |
1475 | PRINT_WARN("netiucv: Given buffer size %d too small.\n", | |
1476 | bs1); | |
1477 | IUCV_DBF_TEXT_(setup, 2, | |
1478 | "buffer_write: buffer size %d too small\n", | |
1479 | bs1); | |
1480 | return -EINVAL; | |
1481 | } | |
1482 | if (bs1 < (576 + NETIUCV_HDRLEN + NETIUCV_HDRLEN)) { | |
1483 | PRINT_WARN("netiucv: Given buffer size %d too small.\n", | |
1484 | bs1); | |
1485 | IUCV_DBF_TEXT_(setup, 2, | |
1486 | "buffer_write: buffer size %d too small\n", | |
1487 | bs1); | |
1488 | return -EINVAL; | |
1489 | } | |
1490 | ||
1491 | priv->conn->max_buffsize = bs1; | |
1492 | if (!(ndev->flags & IFF_RUNNING)) | |
1493 | ndev->mtu = bs1 - NETIUCV_HDRLEN - NETIUCV_HDRLEN; | |
1494 | ||
1495 | return count; | |
1496 | ||
1497 | } | |
1498 | ||
1499 | static DEVICE_ATTR(buffer, 0644, buffer_show, buffer_write); | |
1500 | ||
eebce385 MS |
1501 | static ssize_t dev_fsm_show (struct device *dev, struct device_attribute *attr, |
1502 | char *buf) | |
1da177e4 LT |
1503 | { |
1504 | struct netiucv_priv *priv = dev->driver_data; | |
1505 | ||
1506 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1507 | return sprintf(buf, "%s\n", fsm_getstate_str(priv->fsm)); | |
1508 | } | |
1509 | ||
1510 | static DEVICE_ATTR(device_fsm_state, 0444, dev_fsm_show, NULL); | |
1511 | ||
eebce385 MS |
1512 | static ssize_t conn_fsm_show (struct device *dev, |
1513 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
1514 | { |
1515 | struct netiucv_priv *priv = dev->driver_data; | |
1516 | ||
1517 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1518 | return sprintf(buf, "%s\n", fsm_getstate_str(priv->conn->fsm)); | |
1519 | } | |
1520 | ||
1521 | static DEVICE_ATTR(connection_fsm_state, 0444, conn_fsm_show, NULL); | |
1522 | ||
eebce385 MS |
1523 | static ssize_t maxmulti_show (struct device *dev, |
1524 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
1525 | { |
1526 | struct netiucv_priv *priv = dev->driver_data; | |
1527 | ||
1528 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1529 | return sprintf(buf, "%ld\n", priv->conn->prof.maxmulti); | |
1530 | } | |
1531 | ||
eebce385 MS |
1532 | static ssize_t maxmulti_write (struct device *dev, |
1533 | struct device_attribute *attr, | |
1534 | const char *buf, size_t count) | |
1da177e4 LT |
1535 | { |
1536 | struct netiucv_priv *priv = dev->driver_data; | |
1537 | ||
1538 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); | |
1539 | priv->conn->prof.maxmulti = 0; | |
1540 | return count; | |
1541 | } | |
1542 | ||
1543 | static DEVICE_ATTR(max_tx_buffer_used, 0644, maxmulti_show, maxmulti_write); | |
1544 | ||
eebce385 MS |
1545 | static ssize_t maxcq_show (struct device *dev, struct device_attribute *attr, |
1546 | char *buf) | |
1da177e4 LT |
1547 | { |
1548 | struct netiucv_priv *priv = dev->driver_data; | |
1549 | ||
1550 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1551 | return sprintf(buf, "%ld\n", priv->conn->prof.maxcqueue); | |
1552 | } | |
1553 | ||
eebce385 MS |
1554 | static ssize_t maxcq_write (struct device *dev, struct device_attribute *attr, |
1555 | const char *buf, size_t count) | |
1da177e4 LT |
1556 | { |
1557 | struct netiucv_priv *priv = dev->driver_data; | |
e82b0f2c | 1558 | |
1da177e4 LT |
1559 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
1560 | priv->conn->prof.maxcqueue = 0; | |
1561 | return count; | |
1562 | } | |
1563 | ||
1564 | static DEVICE_ATTR(max_chained_skbs, 0644, maxcq_show, maxcq_write); | |
1565 | ||
eebce385 MS |
1566 | static ssize_t sdoio_show (struct device *dev, struct device_attribute *attr, |
1567 | char *buf) | |
1da177e4 LT |
1568 | { |
1569 | struct netiucv_priv *priv = dev->driver_data; | |
1570 | ||
1571 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1572 | return sprintf(buf, "%ld\n", priv->conn->prof.doios_single); | |
1573 | } | |
1574 | ||
eebce385 MS |
1575 | static ssize_t sdoio_write (struct device *dev, struct device_attribute *attr, |
1576 | const char *buf, size_t count) | |
1da177e4 LT |
1577 | { |
1578 | struct netiucv_priv *priv = dev->driver_data; | |
e82b0f2c | 1579 | |
1da177e4 LT |
1580 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
1581 | priv->conn->prof.doios_single = 0; | |
1582 | return count; | |
1583 | } | |
1584 | ||
1585 | static DEVICE_ATTR(tx_single_write_ops, 0644, sdoio_show, sdoio_write); | |
1586 | ||
eebce385 MS |
1587 | static ssize_t mdoio_show (struct device *dev, struct device_attribute *attr, |
1588 | char *buf) | |
1da177e4 LT |
1589 | { |
1590 | struct netiucv_priv *priv = dev->driver_data; | |
1591 | ||
1592 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1593 | return sprintf(buf, "%ld\n", priv->conn->prof.doios_multi); | |
1594 | } | |
1595 | ||
eebce385 MS |
1596 | static ssize_t mdoio_write (struct device *dev, struct device_attribute *attr, |
1597 | const char *buf, size_t count) | |
1da177e4 LT |
1598 | { |
1599 | struct netiucv_priv *priv = dev->driver_data; | |
e82b0f2c | 1600 | |
1da177e4 LT |
1601 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); |
1602 | priv->conn->prof.doios_multi = 0; | |
1603 | return count; | |
1604 | } | |
1605 | ||
1606 | static DEVICE_ATTR(tx_multi_write_ops, 0644, mdoio_show, mdoio_write); | |
1607 | ||
eebce385 MS |
1608 | static ssize_t txlen_show (struct device *dev, struct device_attribute *attr, |
1609 | char *buf) | |
1da177e4 LT |
1610 | { |
1611 | struct netiucv_priv *priv = dev->driver_data; | |
1612 | ||
1613 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1614 | return sprintf(buf, "%ld\n", priv->conn->prof.txlen); | |
1615 | } | |
1616 | ||
eebce385 MS |
1617 | static ssize_t txlen_write (struct device *dev, struct device_attribute *attr, |
1618 | const char *buf, size_t count) | |
1da177e4 LT |
1619 | { |
1620 | struct netiucv_priv *priv = dev->driver_data; | |
e82b0f2c | 1621 | |
1da177e4 LT |
1622 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
1623 | priv->conn->prof.txlen = 0; | |
1624 | return count; | |
1625 | } | |
1626 | ||
1627 | static DEVICE_ATTR(netto_bytes, 0644, txlen_show, txlen_write); | |
1628 | ||
eebce385 MS |
1629 | static ssize_t txtime_show (struct device *dev, struct device_attribute *attr, |
1630 | char *buf) | |
1da177e4 LT |
1631 | { |
1632 | struct netiucv_priv *priv = dev->driver_data; | |
1633 | ||
1634 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1635 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_time); | |
1636 | } | |
1637 | ||
eebce385 MS |
1638 | static ssize_t txtime_write (struct device *dev, struct device_attribute *attr, |
1639 | const char *buf, size_t count) | |
1da177e4 LT |
1640 | { |
1641 | struct netiucv_priv *priv = dev->driver_data; | |
e82b0f2c | 1642 | |
1da177e4 LT |
1643 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
1644 | priv->conn->prof.tx_time = 0; | |
1645 | return count; | |
1646 | } | |
1647 | ||
1648 | static DEVICE_ATTR(max_tx_io_time, 0644, txtime_show, txtime_write); | |
1649 | ||
eebce385 MS |
1650 | static ssize_t txpend_show (struct device *dev, struct device_attribute *attr, |
1651 | char *buf) | |
1da177e4 LT |
1652 | { |
1653 | struct netiucv_priv *priv = dev->driver_data; | |
1654 | ||
1655 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1656 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_pending); | |
1657 | } | |
1658 | ||
eebce385 MS |
1659 | static ssize_t txpend_write (struct device *dev, struct device_attribute *attr, |
1660 | const char *buf, size_t count) | |
1da177e4 LT |
1661 | { |
1662 | struct netiucv_priv *priv = dev->driver_data; | |
1663 | ||
1664 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); | |
1665 | priv->conn->prof.tx_pending = 0; | |
1666 | return count; | |
1667 | } | |
1668 | ||
1669 | static DEVICE_ATTR(tx_pending, 0644, txpend_show, txpend_write); | |
1670 | ||
eebce385 MS |
1671 | static ssize_t txmpnd_show (struct device *dev, struct device_attribute *attr, |
1672 | char *buf) | |
1da177e4 LT |
1673 | { |
1674 | struct netiucv_priv *priv = dev->driver_data; | |
1675 | ||
1676 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1677 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_max_pending); | |
1678 | } | |
1679 | ||
eebce385 MS |
1680 | static ssize_t txmpnd_write (struct device *dev, struct device_attribute *attr, |
1681 | const char *buf, size_t count) | |
1da177e4 LT |
1682 | { |
1683 | struct netiucv_priv *priv = dev->driver_data; | |
1684 | ||
1685 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); | |
1686 | priv->conn->prof.tx_max_pending = 0; | |
1687 | return count; | |
1688 | } | |
1689 | ||
1690 | static DEVICE_ATTR(tx_max_pending, 0644, txmpnd_show, txmpnd_write); | |
1691 | ||
1692 | static struct attribute *netiucv_attrs[] = { | |
1693 | &dev_attr_buffer.attr, | |
1694 | &dev_attr_user.attr, | |
1695 | NULL, | |
1696 | }; | |
1697 | ||
1698 | static struct attribute_group netiucv_attr_group = { | |
1699 | .attrs = netiucv_attrs, | |
1700 | }; | |
1701 | ||
1702 | static struct attribute *netiucv_stat_attrs[] = { | |
1703 | &dev_attr_device_fsm_state.attr, | |
1704 | &dev_attr_connection_fsm_state.attr, | |
1705 | &dev_attr_max_tx_buffer_used.attr, | |
1706 | &dev_attr_max_chained_skbs.attr, | |
1707 | &dev_attr_tx_single_write_ops.attr, | |
1708 | &dev_attr_tx_multi_write_ops.attr, | |
1709 | &dev_attr_netto_bytes.attr, | |
1710 | &dev_attr_max_tx_io_time.attr, | |
1711 | &dev_attr_tx_pending.attr, | |
1712 | &dev_attr_tx_max_pending.attr, | |
1713 | NULL, | |
1714 | }; | |
1715 | ||
1716 | static struct attribute_group netiucv_stat_attr_group = { | |
1717 | .name = "stats", | |
1718 | .attrs = netiucv_stat_attrs, | |
1719 | }; | |
1720 | ||
d4614627 | 1721 | static int netiucv_add_files(struct device *dev) |
1da177e4 LT |
1722 | { |
1723 | int ret; | |
1724 | ||
1725 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1726 | ret = sysfs_create_group(&dev->kobj, &netiucv_attr_group); | |
1727 | if (ret) | |
1728 | return ret; | |
1729 | ret = sysfs_create_group(&dev->kobj, &netiucv_stat_attr_group); | |
1730 | if (ret) | |
1731 | sysfs_remove_group(&dev->kobj, &netiucv_attr_group); | |
1732 | return ret; | |
1733 | } | |
1734 | ||
d4614627 | 1735 | static void netiucv_remove_files(struct device *dev) |
1da177e4 LT |
1736 | { |
1737 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1738 | sysfs_remove_group(&dev->kobj, &netiucv_stat_attr_group); | |
1739 | sysfs_remove_group(&dev->kobj, &netiucv_attr_group); | |
1740 | } | |
1741 | ||
eebce385 | 1742 | static int netiucv_register_device(struct net_device *ndev) |
1da177e4 | 1743 | { |
eebce385 | 1744 | struct netiucv_priv *priv = netdev_priv(ndev); |
88abaab4 | 1745 | struct device *dev = kzalloc(sizeof(struct device), GFP_KERNEL); |
1da177e4 LT |
1746 | int ret; |
1747 | ||
1748 | ||
1749 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1750 | ||
1751 | if (dev) { | |
1da177e4 LT |
1752 | snprintf(dev->bus_id, BUS_ID_SIZE, "net%s", ndev->name); |
1753 | dev->bus = &iucv_bus; | |
1754 | dev->parent = iucv_root; | |
1755 | /* | |
1756 | * The release function could be called after the | |
1757 | * module has been unloaded. It's _only_ task is to | |
1758 | * free the struct. Therefore, we specify kfree() | |
1759 | * directly here. (Probably a little bit obfuscating | |
1760 | * but legitime ...). | |
1761 | */ | |
1762 | dev->release = (void (*)(struct device *))kfree; | |
1763 | dev->driver = &netiucv_driver; | |
1764 | } else | |
1765 | return -ENOMEM; | |
1766 | ||
1767 | ret = device_register(dev); | |
1768 | ||
1769 | if (ret) | |
1770 | return ret; | |
1771 | ret = netiucv_add_files(dev); | |
1772 | if (ret) | |
1773 | goto out_unreg; | |
1774 | priv->dev = dev; | |
1775 | dev->driver_data = priv; | |
1776 | return 0; | |
1777 | ||
1778 | out_unreg: | |
1779 | device_unregister(dev); | |
1780 | return ret; | |
1781 | } | |
1782 | ||
eebce385 | 1783 | static void netiucv_unregister_device(struct device *dev) |
1da177e4 LT |
1784 | { |
1785 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1786 | netiucv_remove_files(dev); | |
1787 | device_unregister(dev); | |
1788 | } | |
1789 | ||
1790 | /** | |
1791 | * Allocate and initialize a new connection structure. | |
1792 | * Add it to the list of netiucv connections; | |
1793 | */ | |
eebce385 MS |
1794 | static struct iucv_connection *netiucv_new_connection(struct net_device *dev, |
1795 | char *username) | |
1796 | { | |
1797 | struct iucv_connection *conn; | |
1da177e4 | 1798 | |
eebce385 MS |
1799 | conn = kzalloc(sizeof(*conn), GFP_KERNEL); |
1800 | if (!conn) | |
1801 | goto out; | |
1802 | skb_queue_head_init(&conn->collect_queue); | |
1803 | skb_queue_head_init(&conn->commit_queue); | |
1804 | spin_lock_init(&conn->collect_lock); | |
1805 | conn->max_buffsize = NETIUCV_BUFSIZE_DEFAULT; | |
1806 | conn->netdev = dev; | |
1807 | ||
1808 | conn->rx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA); | |
1809 | if (!conn->rx_buff) | |
1810 | goto out_conn; | |
1811 | conn->tx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA); | |
1812 | if (!conn->tx_buff) | |
1813 | goto out_rx; | |
1814 | conn->fsm = init_fsm("netiucvconn", conn_state_names, | |
1815 | conn_event_names, NR_CONN_STATES, | |
1816 | NR_CONN_EVENTS, conn_fsm, CONN_FSM_LEN, | |
1817 | GFP_KERNEL); | |
1818 | if (!conn->fsm) | |
1819 | goto out_tx; | |
1820 | ||
1821 | fsm_settimer(conn->fsm, &conn->timer); | |
1822 | fsm_newstate(conn->fsm, CONN_STATE_INVALID); | |
1823 | ||
1824 | if (username) { | |
1825 | memcpy(conn->userid, username, 9); | |
1826 | fsm_newstate(conn->fsm, CONN_STATE_STOPPED); | |
1da177e4 | 1827 | } |
eebce385 MS |
1828 | |
1829 | write_lock_bh(&iucv_connection_rwlock); | |
1830 | list_add_tail(&conn->list, &iucv_connection_list); | |
1831 | write_unlock_bh(&iucv_connection_rwlock); | |
1da177e4 | 1832 | return conn; |
eebce385 MS |
1833 | |
1834 | out_tx: | |
1835 | kfree_skb(conn->tx_buff); | |
1836 | out_rx: | |
1837 | kfree_skb(conn->rx_buff); | |
1838 | out_conn: | |
1839 | kfree(conn); | |
1840 | out: | |
1841 | return NULL; | |
1da177e4 LT |
1842 | } |
1843 | ||
1844 | /** | |
1845 | * Release a connection structure and remove it from the | |
1846 | * list of netiucv connections. | |
1847 | */ | |
eebce385 | 1848 | static void netiucv_remove_connection(struct iucv_connection *conn) |
1da177e4 | 1849 | { |
1da177e4 | 1850 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
eebce385 MS |
1851 | write_lock_bh(&iucv_connection_rwlock); |
1852 | list_del_init(&conn->list); | |
1853 | write_unlock_bh(&iucv_connection_rwlock); | |
0be4acec UB |
1854 | fsm_deltimer(&conn->timer); |
1855 | netiucv_purge_skb_queue(&conn->collect_queue); | |
eebce385 MS |
1856 | if (conn->path) { |
1857 | iucv_path_sever(conn->path, iucvMagic); | |
1858 | kfree(conn->path); | |
1859 | conn->path = NULL; | |
1da177e4 | 1860 | } |
0be4acec | 1861 | netiucv_purge_skb_queue(&conn->commit_queue); |
eebce385 MS |
1862 | kfree_fsm(conn->fsm); |
1863 | kfree_skb(conn->rx_buff); | |
1864 | kfree_skb(conn->tx_buff); | |
1da177e4 LT |
1865 | } |
1866 | ||
1867 | /** | |
1868 | * Release everything of a net device. | |
1869 | */ | |
eebce385 | 1870 | static void netiucv_free_netdevice(struct net_device *dev) |
1da177e4 | 1871 | { |
eebce385 | 1872 | struct netiucv_priv *privptr = netdev_priv(dev); |
1da177e4 LT |
1873 | |
1874 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1875 | ||
1876 | if (!dev) | |
1877 | return; | |
1878 | ||
1da177e4 LT |
1879 | if (privptr) { |
1880 | if (privptr->conn) | |
1881 | netiucv_remove_connection(privptr->conn); | |
1882 | if (privptr->fsm) | |
1883 | kfree_fsm(privptr->fsm); | |
1884 | privptr->conn = NULL; privptr->fsm = NULL; | |
1885 | /* privptr gets freed by free_netdev() */ | |
1886 | } | |
1887 | free_netdev(dev); | |
1888 | } | |
1889 | ||
1890 | /** | |
1891 | * Initialize a net device. (Called from kernel in alloc_netdev()) | |
1892 | */ | |
eebce385 | 1893 | static void netiucv_setup_netdevice(struct net_device *dev) |
1da177e4 | 1894 | { |
1da177e4 LT |
1895 | dev->mtu = NETIUCV_MTU_DEFAULT; |
1896 | dev->hard_start_xmit = netiucv_tx; | |
1897 | dev->open = netiucv_open; | |
1898 | dev->stop = netiucv_close; | |
1899 | dev->get_stats = netiucv_stats; | |
1900 | dev->change_mtu = netiucv_change_mtu; | |
1901 | dev->destructor = netiucv_free_netdevice; | |
1902 | dev->hard_header_len = NETIUCV_HDRLEN; | |
1903 | dev->addr_len = 0; | |
1904 | dev->type = ARPHRD_SLIP; | |
1905 | dev->tx_queue_len = NETIUCV_QUEUELEN_DEFAULT; | |
1906 | dev->flags = IFF_POINTOPOINT | IFF_NOARP; | |
1da177e4 LT |
1907 | } |
1908 | ||
1909 | /** | |
1910 | * Allocate and initialize everything of a net device. | |
1911 | */ | |
eebce385 | 1912 | static struct net_device *netiucv_init_netdevice(char *username) |
1da177e4 LT |
1913 | { |
1914 | struct netiucv_priv *privptr; | |
1915 | struct net_device *dev; | |
1916 | ||
1917 | dev = alloc_netdev(sizeof(struct netiucv_priv), "iucv%d", | |
1918 | netiucv_setup_netdevice); | |
1919 | if (!dev) | |
1920 | return NULL; | |
eebce385 MS |
1921 | if (dev_alloc_name(dev, dev->name) < 0) |
1922 | goto out_netdev; | |
1da177e4 | 1923 | |
eebce385 | 1924 | privptr = netdev_priv(dev); |
1da177e4 LT |
1925 | privptr->fsm = init_fsm("netiucvdev", dev_state_names, |
1926 | dev_event_names, NR_DEV_STATES, NR_DEV_EVENTS, | |
1927 | dev_fsm, DEV_FSM_LEN, GFP_KERNEL); | |
eebce385 MS |
1928 | if (!privptr->fsm) |
1929 | goto out_netdev; | |
1930 | ||
1da177e4 LT |
1931 | privptr->conn = netiucv_new_connection(dev, username); |
1932 | if (!privptr->conn) { | |
1da177e4 | 1933 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_new_connection\n"); |
eebce385 | 1934 | goto out_fsm; |
1da177e4 LT |
1935 | } |
1936 | fsm_newstate(privptr->fsm, DEV_STATE_STOPPED); | |
1da177e4 | 1937 | return dev; |
eebce385 MS |
1938 | |
1939 | out_fsm: | |
1940 | kfree_fsm(privptr->fsm); | |
1941 | out_netdev: | |
1942 | free_netdev(dev); | |
1943 | return NULL; | |
1da177e4 LT |
1944 | } |
1945 | ||
eebce385 MS |
1946 | static ssize_t conn_write(struct device_driver *drv, |
1947 | const char *buf, size_t count) | |
1da177e4 | 1948 | { |
eebce385 | 1949 | const char *p; |
16a83b30 | 1950 | char username[9]; |
eebce385 | 1951 | int i, rc; |
1da177e4 | 1952 | struct net_device *dev; |
eebce385 MS |
1953 | struct netiucv_priv *priv; |
1954 | struct iucv_connection *cp; | |
1da177e4 LT |
1955 | |
1956 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1957 | if (count>9) { | |
1958 | PRINT_WARN("netiucv: username too long (%d)!\n", (int)count); | |
1959 | IUCV_DBF_TEXT(setup, 2, "conn_write: too long\n"); | |
1960 | return -EINVAL; | |
1961 | } | |
1962 | ||
eebce385 MS |
1963 | for (i = 0, p = buf; i < 8 && *p; i++, p++) { |
1964 | if (isalnum(*p) || *p == '$') { | |
1965 | username[i] = toupper(*p); | |
1966 | continue; | |
1967 | } | |
1968 | if (*p == '\n') | |
1da177e4 LT |
1969 | /* trailing lf, grr */ |
1970 | break; | |
eebce385 MS |
1971 | PRINT_WARN("netiucv: Invalid character in username!\n"); |
1972 | IUCV_DBF_TEXT_(setup, 2, | |
1973 | "conn_write: invalid character %c\n", *p); | |
1974 | return -EINVAL; | |
1da177e4 | 1975 | } |
eebce385 | 1976 | while (i < 8) |
1da177e4 | 1977 | username[i++] = ' '; |
16a83b30 FP |
1978 | username[8] = '\0'; |
1979 | ||
eebce385 MS |
1980 | read_lock_bh(&iucv_connection_rwlock); |
1981 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
1982 | if (!strncmp(username, cp->userid, 9)) { | |
1983 | read_unlock_bh(&iucv_connection_rwlock); | |
1984 | PRINT_WARN("netiucv: Connection to %s already " | |
1985 | "exists\n", username); | |
1986 | return -EEXIST; | |
1987 | } | |
16a83b30 | 1988 | } |
eebce385 MS |
1989 | read_unlock_bh(&iucv_connection_rwlock); |
1990 | ||
1da177e4 LT |
1991 | dev = netiucv_init_netdevice(username); |
1992 | if (!dev) { | |
eebce385 MS |
1993 | PRINT_WARN("netiucv: Could not allocate network device " |
1994 | "structure for user '%s'\n", | |
1995 | netiucv_printname(username)); | |
1da177e4 LT |
1996 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_init_netdevice\n"); |
1997 | return -ENODEV; | |
1998 | } | |
1999 | ||
eebce385 MS |
2000 | rc = netiucv_register_device(dev); |
2001 | if (rc) { | |
1da177e4 | 2002 | IUCV_DBF_TEXT_(setup, 2, |
eebce385 | 2003 | "ret %d from netiucv_register_device\n", rc); |
1da177e4 LT |
2004 | goto out_free_ndev; |
2005 | } | |
2006 | ||
2007 | /* sysfs magic */ | |
eebce385 MS |
2008 | priv = netdev_priv(dev); |
2009 | SET_NETDEV_DEV(dev, priv->dev); | |
1da177e4 | 2010 | |
eebce385 MS |
2011 | rc = register_netdev(dev); |
2012 | if (rc) | |
2013 | goto out_unreg; | |
1da177e4 LT |
2014 | |
2015 | PRINT_INFO("%s: '%s'\n", dev->name, netiucv_printname(username)); | |
e82b0f2c | 2016 | |
1da177e4 LT |
2017 | return count; |
2018 | ||
eebce385 MS |
2019 | out_unreg: |
2020 | netiucv_unregister_device(priv->dev); | |
1da177e4 LT |
2021 | out_free_ndev: |
2022 | PRINT_WARN("netiucv: Could not register '%s'\n", dev->name); | |
2023 | IUCV_DBF_TEXT(setup, 2, "conn_write: could not register\n"); | |
2024 | netiucv_free_netdevice(dev); | |
eebce385 | 2025 | return rc; |
1da177e4 LT |
2026 | } |
2027 | ||
2b67fc46 | 2028 | static DRIVER_ATTR(connection, 0200, NULL, conn_write); |
1da177e4 | 2029 | |
eebce385 MS |
2030 | static ssize_t remove_write (struct device_driver *drv, |
2031 | const char *buf, size_t count) | |
1da177e4 | 2032 | { |
eebce385 | 2033 | struct iucv_connection *cp; |
1da177e4 LT |
2034 | struct net_device *ndev; |
2035 | struct netiucv_priv *priv; | |
2036 | struct device *dev; | |
2037 | char name[IFNAMSIZ]; | |
eebce385 | 2038 | const char *p; |
1da177e4 LT |
2039 | int i; |
2040 | ||
2041 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
2042 | ||
2043 | if (count >= IFNAMSIZ) | |
16a83b30 | 2044 | count = IFNAMSIZ - 1;; |
1da177e4 | 2045 | |
eebce385 MS |
2046 | for (i = 0, p = buf; i < count && *p; i++, p++) { |
2047 | if (*p == '\n' || *p == ' ') | |
1da177e4 LT |
2048 | /* trailing lf, grr */ |
2049 | break; | |
eebce385 | 2050 | name[i] = *p; |
1da177e4 LT |
2051 | } |
2052 | name[i] = '\0'; | |
2053 | ||
eebce385 MS |
2054 | read_lock_bh(&iucv_connection_rwlock); |
2055 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
2056 | ndev = cp->netdev; | |
2057 | priv = netdev_priv(ndev); | |
1da177e4 | 2058 | dev = priv->dev; |
eebce385 MS |
2059 | if (strncmp(name, ndev->name, count)) |
2060 | continue; | |
2061 | read_unlock_bh(&iucv_connection_rwlock); | |
1da177e4 | 2062 | if (ndev->flags & (IFF_UP | IFF_RUNNING)) { |
eebce385 MS |
2063 | PRINT_WARN("netiucv: net device %s active with peer " |
2064 | "%s\n", ndev->name, priv->conn->userid); | |
1da177e4 | 2065 | PRINT_WARN("netiucv: %s cannot be removed\n", |
eebce385 | 2066 | ndev->name); |
1da177e4 LT |
2067 | IUCV_DBF_TEXT(data, 2, "remove_write: still active\n"); |
2068 | return -EBUSY; | |
2069 | } | |
2070 | unregister_netdev(ndev); | |
2071 | netiucv_unregister_device(dev); | |
2072 | return count; | |
2073 | } | |
eebce385 | 2074 | read_unlock_bh(&iucv_connection_rwlock); |
1da177e4 LT |
2075 | PRINT_WARN("netiucv: net device %s unknown\n", name); |
2076 | IUCV_DBF_TEXT(data, 2, "remove_write: unknown device\n"); | |
2077 | return -EINVAL; | |
2078 | } | |
2079 | ||
2b67fc46 | 2080 | static DRIVER_ATTR(remove, 0200, NULL, remove_write); |
1da177e4 | 2081 | |
eebce385 MS |
2082 | static struct attribute * netiucv_drv_attrs[] = { |
2083 | &driver_attr_connection.attr, | |
2084 | &driver_attr_remove.attr, | |
2085 | NULL, | |
2086 | }; | |
2087 | ||
2088 | static struct attribute_group netiucv_drv_attr_group = { | |
2089 | .attrs = netiucv_drv_attrs, | |
2090 | }; | |
2091 | ||
5b88feb1 CH |
2092 | static struct attribute_group *netiucv_drv_attr_groups[] = { |
2093 | &netiucv_drv_attr_group, | |
2094 | NULL, | |
2095 | }; | |
2096 | ||
eebce385 | 2097 | static void netiucv_banner(void) |
1da177e4 | 2098 | { |
e018ba1f | 2099 | PRINT_INFO("NETIUCV driver initialized\n"); |
1da177e4 LT |
2100 | } |
2101 | ||
eebce385 | 2102 | static void __exit netiucv_exit(void) |
1da177e4 | 2103 | { |
eebce385 MS |
2104 | struct iucv_connection *cp; |
2105 | struct net_device *ndev; | |
2106 | struct netiucv_priv *priv; | |
2107 | struct device *dev; | |
2108 | ||
1da177e4 | 2109 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
eebce385 MS |
2110 | while (!list_empty(&iucv_connection_list)) { |
2111 | cp = list_entry(iucv_connection_list.next, | |
2112 | struct iucv_connection, list); | |
eebce385 MS |
2113 | ndev = cp->netdev; |
2114 | priv = netdev_priv(ndev); | |
2115 | dev = priv->dev; | |
1da177e4 LT |
2116 | |
2117 | unregister_netdev(ndev); | |
2118 | netiucv_unregister_device(dev); | |
2119 | } | |
2120 | ||
1da177e4 | 2121 | driver_unregister(&netiucv_driver); |
eebce385 | 2122 | iucv_unregister(&netiucv_handler, 1); |
1da177e4 LT |
2123 | iucv_unregister_dbf_views(); |
2124 | ||
2125 | PRINT_INFO("NETIUCV driver unloaded\n"); | |
2126 | return; | |
2127 | } | |
2128 | ||
eebce385 | 2129 | static int __init netiucv_init(void) |
1da177e4 | 2130 | { |
eebce385 | 2131 | int rc; |
e82b0f2c | 2132 | |
eebce385 MS |
2133 | rc = iucv_register_dbf_views(); |
2134 | if (rc) | |
2135 | goto out; | |
2136 | rc = iucv_register(&netiucv_handler, 1); | |
2137 | if (rc) | |
2138 | goto out_dbf; | |
1da177e4 | 2139 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
5b88feb1 | 2140 | netiucv_driver.groups = netiucv_drv_attr_groups; |
eebce385 MS |
2141 | rc = driver_register(&netiucv_driver); |
2142 | if (rc) { | |
1da177e4 | 2143 | PRINT_ERR("NETIUCV: failed to register driver.\n"); |
eebce385 MS |
2144 | IUCV_DBF_TEXT_(setup, 2, "ret %d from driver_register\n", rc); |
2145 | goto out_iucv; | |
1da177e4 LT |
2146 | } |
2147 | ||
eebce385 MS |
2148 | netiucv_banner(); |
2149 | return rc; | |
2150 | ||
eebce385 MS |
2151 | out_iucv: |
2152 | iucv_unregister(&netiucv_handler, 1); | |
2153 | out_dbf: | |
2154 | iucv_unregister_dbf_views(); | |
2155 | out: | |
2156 | return rc; | |
1da177e4 | 2157 | } |
e82b0f2c | 2158 | |
1da177e4 LT |
2159 | module_init(netiucv_init); |
2160 | module_exit(netiucv_exit); | |
2161 | MODULE_LICENSE("GPL"); |