Commit | Line | Data |
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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 | ||
f33780d3 PT |
100 | /* Allow to sort out low debug levels early to avoid wasted sprints */ |
101 | static inline int iucv_dbf_passes(debug_info_t *dbf_grp, int level) | |
102 | { | |
103 | return (level <= dbf_grp->level); | |
104 | } | |
105 | ||
106 | #define IUCV_DBF_TEXT_(name, level, text...) \ | |
107 | do { \ | |
108 | if (iucv_dbf_passes(iucv_dbf_##name, level)) { \ | |
109 | char* iucv_dbf_txt_buf = \ | |
110 | get_cpu_var(iucv_dbf_txt_buf); \ | |
111 | sprintf(iucv_dbf_txt_buf, text); \ | |
112 | debug_text_event(iucv_dbf_##name, level, \ | |
113 | iucv_dbf_txt_buf); \ | |
114 | put_cpu_var(iucv_dbf_txt_buf); \ | |
115 | } \ | |
eebce385 MS |
116 | } while (0) |
117 | ||
118 | #define IUCV_DBF_SPRINTF(name,level,text...) \ | |
119 | do { \ | |
120 | debug_sprintf_event(iucv_dbf_trace, level, ##text ); \ | |
121 | debug_sprintf_event(iucv_dbf_trace, level, text ); \ | |
122 | } while (0) | |
123 | ||
124 | /** | |
125 | * some more debug stuff | |
126 | */ | |
127 | #define IUCV_HEXDUMP16(importance,header,ptr) \ | |
128 | PRINT_##importance(header "%02x %02x %02x %02x %02x %02x %02x %02x " \ | |
129 | "%02x %02x %02x %02x %02x %02x %02x %02x\n", \ | |
130 | *(((char*)ptr)),*(((char*)ptr)+1),*(((char*)ptr)+2), \ | |
131 | *(((char*)ptr)+3),*(((char*)ptr)+4),*(((char*)ptr)+5), \ | |
132 | *(((char*)ptr)+6),*(((char*)ptr)+7),*(((char*)ptr)+8), \ | |
133 | *(((char*)ptr)+9),*(((char*)ptr)+10),*(((char*)ptr)+11), \ | |
134 | *(((char*)ptr)+12),*(((char*)ptr)+13), \ | |
135 | *(((char*)ptr)+14),*(((char*)ptr)+15)); \ | |
136 | PRINT_##importance(header "%02x %02x %02x %02x %02x %02x %02x %02x " \ | |
137 | "%02x %02x %02x %02x %02x %02x %02x %02x\n", \ | |
138 | *(((char*)ptr)+16),*(((char*)ptr)+17), \ | |
139 | *(((char*)ptr)+18),*(((char*)ptr)+19), \ | |
140 | *(((char*)ptr)+20),*(((char*)ptr)+21), \ | |
141 | *(((char*)ptr)+22),*(((char*)ptr)+23), \ | |
142 | *(((char*)ptr)+24),*(((char*)ptr)+25), \ | |
143 | *(((char*)ptr)+26),*(((char*)ptr)+27), \ | |
144 | *(((char*)ptr)+28),*(((char*)ptr)+29), \ | |
145 | *(((char*)ptr)+30),*(((char*)ptr)+31)); | |
146 | ||
1da177e4 LT |
147 | #define PRINTK_HEADER " iucv: " /* for debugging */ |
148 | ||
149 | static struct device_driver netiucv_driver = { | |
2219510f | 150 | .owner = THIS_MODULE, |
1da177e4 LT |
151 | .name = "netiucv", |
152 | .bus = &iucv_bus, | |
153 | }; | |
154 | ||
eebce385 MS |
155 | static int netiucv_callback_connreq(struct iucv_path *, |
156 | u8 ipvmid[8], u8 ipuser[16]); | |
157 | static void netiucv_callback_connack(struct iucv_path *, u8 ipuser[16]); | |
158 | static void netiucv_callback_connrej(struct iucv_path *, u8 ipuser[16]); | |
159 | static void netiucv_callback_connsusp(struct iucv_path *, u8 ipuser[16]); | |
160 | static void netiucv_callback_connres(struct iucv_path *, u8 ipuser[16]); | |
161 | static void netiucv_callback_rx(struct iucv_path *, struct iucv_message *); | |
162 | static void netiucv_callback_txdone(struct iucv_path *, struct iucv_message *); | |
163 | ||
164 | static struct iucv_handler netiucv_handler = { | |
165 | .path_pending = netiucv_callback_connreq, | |
166 | .path_complete = netiucv_callback_connack, | |
167 | .path_severed = netiucv_callback_connrej, | |
168 | .path_quiesced = netiucv_callback_connsusp, | |
169 | .path_resumed = netiucv_callback_connres, | |
170 | .message_pending = netiucv_callback_rx, | |
171 | .message_complete = netiucv_callback_txdone | |
172 | }; | |
173 | ||
1da177e4 LT |
174 | /** |
175 | * Per connection profiling data | |
176 | */ | |
177 | struct connection_profile { | |
178 | unsigned long maxmulti; | |
179 | unsigned long maxcqueue; | |
180 | unsigned long doios_single; | |
181 | unsigned long doios_multi; | |
182 | unsigned long txlen; | |
183 | unsigned long tx_time; | |
184 | struct timespec send_stamp; | |
185 | unsigned long tx_pending; | |
186 | unsigned long tx_max_pending; | |
187 | }; | |
188 | ||
189 | /** | |
190 | * Representation of one iucv connection | |
191 | */ | |
192 | struct iucv_connection { | |
eebce385 MS |
193 | struct list_head list; |
194 | struct iucv_path *path; | |
1da177e4 LT |
195 | struct sk_buff *rx_buff; |
196 | struct sk_buff *tx_buff; | |
197 | struct sk_buff_head collect_queue; | |
198 | struct sk_buff_head commit_queue; | |
199 | spinlock_t collect_lock; | |
200 | int collect_len; | |
201 | int max_buffsize; | |
202 | fsm_timer timer; | |
203 | fsm_instance *fsm; | |
204 | struct net_device *netdev; | |
205 | struct connection_profile prof; | |
206 | char userid[9]; | |
207 | }; | |
208 | ||
209 | /** | |
210 | * Linked list of all connection structs. | |
211 | */ | |
c11ca97e | 212 | static LIST_HEAD(iucv_connection_list); |
bfac0d0b | 213 | static DEFINE_RWLOCK(iucv_connection_rwlock); |
1da177e4 LT |
214 | |
215 | /** | |
216 | * Representation of event-data for the | |
217 | * connection state machine. | |
218 | */ | |
219 | struct iucv_event { | |
220 | struct iucv_connection *conn; | |
221 | void *data; | |
222 | }; | |
223 | ||
224 | /** | |
225 | * Private part of the network device structure | |
226 | */ | |
227 | struct netiucv_priv { | |
228 | struct net_device_stats stats; | |
229 | unsigned long tbusy; | |
230 | fsm_instance *fsm; | |
231 | struct iucv_connection *conn; | |
232 | struct device *dev; | |
233 | }; | |
234 | ||
235 | /** | |
236 | * Link level header for a packet. | |
237 | */ | |
eebce385 MS |
238 | struct ll_header { |
239 | u16 next; | |
240 | }; | |
1da177e4 | 241 | |
eebce385 | 242 | #define NETIUCV_HDRLEN (sizeof(struct ll_header)) |
1da177e4 LT |
243 | #define NETIUCV_BUFSIZE_MAX 32768 |
244 | #define NETIUCV_BUFSIZE_DEFAULT NETIUCV_BUFSIZE_MAX | |
245 | #define NETIUCV_MTU_MAX (NETIUCV_BUFSIZE_MAX - NETIUCV_HDRLEN) | |
246 | #define NETIUCV_MTU_DEFAULT 9216 | |
247 | #define NETIUCV_QUEUELEN_DEFAULT 50 | |
248 | #define NETIUCV_TIMEOUT_5SEC 5000 | |
249 | ||
250 | /** | |
251 | * Compatibility macros for busy handling | |
252 | * of network devices. | |
253 | */ | |
eebce385 | 254 | static inline void netiucv_clear_busy(struct net_device *dev) |
1da177e4 | 255 | { |
eebce385 MS |
256 | struct netiucv_priv *priv = netdev_priv(dev); |
257 | clear_bit(0, &priv->tbusy); | |
1da177e4 LT |
258 | netif_wake_queue(dev); |
259 | } | |
260 | ||
eebce385 | 261 | static inline int netiucv_test_and_set_busy(struct net_device *dev) |
1da177e4 | 262 | { |
eebce385 | 263 | struct netiucv_priv *priv = netdev_priv(dev); |
1da177e4 | 264 | netif_stop_queue(dev); |
eebce385 | 265 | return test_and_set_bit(0, &priv->tbusy); |
1da177e4 LT |
266 | } |
267 | ||
eebce385 | 268 | static u8 iucvMagic[16] = { |
1da177e4 LT |
269 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, |
270 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40 | |
271 | }; | |
272 | ||
1da177e4 LT |
273 | /** |
274 | * Convert an iucv userId to its printable | |
275 | * form (strip whitespace at end). | |
276 | * | |
277 | * @param An iucv userId | |
278 | * | |
279 | * @returns The printable string (static data!!) | |
280 | */ | |
d4614627 | 281 | static char *netiucv_printname(char *name) |
1da177e4 LT |
282 | { |
283 | static char tmp[9]; | |
284 | char *p = tmp; | |
285 | memcpy(tmp, name, 8); | |
286 | tmp[8] = '\0'; | |
287 | while (*p && (!isspace(*p))) | |
288 | p++; | |
289 | *p = '\0'; | |
290 | return tmp; | |
291 | } | |
e82b0f2c | 292 | |
1da177e4 LT |
293 | /** |
294 | * States of the interface statemachine. | |
295 | */ | |
296 | enum dev_states { | |
297 | DEV_STATE_STOPPED, | |
298 | DEV_STATE_STARTWAIT, | |
299 | DEV_STATE_STOPWAIT, | |
300 | DEV_STATE_RUNNING, | |
301 | /** | |
302 | * MUST be always the last element!! | |
303 | */ | |
304 | NR_DEV_STATES | |
305 | }; | |
306 | ||
307 | static const char *dev_state_names[] = { | |
308 | "Stopped", | |
309 | "StartWait", | |
310 | "StopWait", | |
311 | "Running", | |
312 | }; | |
313 | ||
314 | /** | |
315 | * Events of the interface statemachine. | |
316 | */ | |
317 | enum dev_events { | |
318 | DEV_EVENT_START, | |
319 | DEV_EVENT_STOP, | |
320 | DEV_EVENT_CONUP, | |
321 | DEV_EVENT_CONDOWN, | |
322 | /** | |
323 | * MUST be always the last element!! | |
324 | */ | |
325 | NR_DEV_EVENTS | |
326 | }; | |
327 | ||
328 | static const char *dev_event_names[] = { | |
329 | "Start", | |
330 | "Stop", | |
331 | "Connection up", | |
332 | "Connection down", | |
333 | }; | |
e82b0f2c | 334 | |
1da177e4 LT |
335 | /** |
336 | * Events of the connection statemachine | |
337 | */ | |
338 | enum conn_events { | |
339 | /** | |
340 | * Events, representing callbacks from | |
341 | * lowlevel iucv layer) | |
342 | */ | |
343 | CONN_EVENT_CONN_REQ, | |
344 | CONN_EVENT_CONN_ACK, | |
345 | CONN_EVENT_CONN_REJ, | |
346 | CONN_EVENT_CONN_SUS, | |
347 | CONN_EVENT_CONN_RES, | |
348 | CONN_EVENT_RX, | |
349 | CONN_EVENT_TXDONE, | |
350 | ||
351 | /** | |
352 | * Events, representing errors return codes from | |
353 | * calls to lowlevel iucv layer | |
354 | */ | |
355 | ||
356 | /** | |
357 | * Event, representing timer expiry. | |
358 | */ | |
359 | CONN_EVENT_TIMER, | |
360 | ||
361 | /** | |
362 | * Events, representing commands from upper levels. | |
363 | */ | |
364 | CONN_EVENT_START, | |
365 | CONN_EVENT_STOP, | |
366 | ||
367 | /** | |
368 | * MUST be always the last element!! | |
369 | */ | |
370 | NR_CONN_EVENTS, | |
371 | }; | |
372 | ||
373 | static const char *conn_event_names[] = { | |
374 | "Remote connection request", | |
375 | "Remote connection acknowledge", | |
376 | "Remote connection reject", | |
377 | "Connection suspended", | |
378 | "Connection resumed", | |
379 | "Data received", | |
380 | "Data sent", | |
381 | ||
382 | "Timer", | |
383 | ||
384 | "Start", | |
385 | "Stop", | |
386 | }; | |
387 | ||
388 | /** | |
389 | * States of the connection statemachine. | |
390 | */ | |
391 | enum conn_states { | |
392 | /** | |
393 | * Connection not assigned to any device, | |
394 | * initial state, invalid | |
395 | */ | |
396 | CONN_STATE_INVALID, | |
397 | ||
398 | /** | |
399 | * Userid assigned but not operating | |
400 | */ | |
401 | CONN_STATE_STOPPED, | |
402 | ||
403 | /** | |
404 | * Connection registered, | |
405 | * no connection request sent yet, | |
406 | * no connection request received | |
407 | */ | |
408 | CONN_STATE_STARTWAIT, | |
409 | ||
410 | /** | |
411 | * Connection registered and connection request sent, | |
412 | * no acknowledge and no connection request received yet. | |
413 | */ | |
414 | CONN_STATE_SETUPWAIT, | |
415 | ||
416 | /** | |
417 | * Connection up and running idle | |
418 | */ | |
419 | CONN_STATE_IDLE, | |
420 | ||
421 | /** | |
422 | * Data sent, awaiting CONN_EVENT_TXDONE | |
423 | */ | |
424 | CONN_STATE_TX, | |
425 | ||
426 | /** | |
427 | * Error during registration. | |
428 | */ | |
429 | CONN_STATE_REGERR, | |
430 | ||
431 | /** | |
432 | * Error during registration. | |
433 | */ | |
434 | CONN_STATE_CONNERR, | |
435 | ||
436 | /** | |
437 | * MUST be always the last element!! | |
438 | */ | |
439 | NR_CONN_STATES, | |
440 | }; | |
441 | ||
442 | static const char *conn_state_names[] = { | |
443 | "Invalid", | |
444 | "Stopped", | |
445 | "StartWait", | |
446 | "SetupWait", | |
447 | "Idle", | |
448 | "TX", | |
449 | "Terminating", | |
450 | "Registration error", | |
451 | "Connect error", | |
452 | }; | |
453 | ||
e82b0f2c | 454 | |
1da177e4 LT |
455 | /** |
456 | * Debug Facility Stuff | |
457 | */ | |
458 | static debug_info_t *iucv_dbf_setup = NULL; | |
459 | static debug_info_t *iucv_dbf_data = NULL; | |
460 | static debug_info_t *iucv_dbf_trace = NULL; | |
461 | ||
462 | DEFINE_PER_CPU(char[256], iucv_dbf_txt_buf); | |
463 | ||
eebce385 | 464 | static void iucv_unregister_dbf_views(void) |
1da177e4 LT |
465 | { |
466 | if (iucv_dbf_setup) | |
467 | debug_unregister(iucv_dbf_setup); | |
468 | if (iucv_dbf_data) | |
469 | debug_unregister(iucv_dbf_data); | |
470 | if (iucv_dbf_trace) | |
471 | debug_unregister(iucv_dbf_trace); | |
472 | } | |
eebce385 | 473 | static int iucv_register_dbf_views(void) |
1da177e4 LT |
474 | { |
475 | iucv_dbf_setup = debug_register(IUCV_DBF_SETUP_NAME, | |
66a464db | 476 | IUCV_DBF_SETUP_PAGES, |
1da177e4 LT |
477 | IUCV_DBF_SETUP_NR_AREAS, |
478 | IUCV_DBF_SETUP_LEN); | |
479 | iucv_dbf_data = debug_register(IUCV_DBF_DATA_NAME, | |
66a464db | 480 | IUCV_DBF_DATA_PAGES, |
1da177e4 LT |
481 | IUCV_DBF_DATA_NR_AREAS, |
482 | IUCV_DBF_DATA_LEN); | |
483 | iucv_dbf_trace = debug_register(IUCV_DBF_TRACE_NAME, | |
66a464db | 484 | IUCV_DBF_TRACE_PAGES, |
1da177e4 LT |
485 | IUCV_DBF_TRACE_NR_AREAS, |
486 | IUCV_DBF_TRACE_LEN); | |
487 | ||
488 | if ((iucv_dbf_setup == NULL) || (iucv_dbf_data == NULL) || | |
489 | (iucv_dbf_trace == NULL)) { | |
490 | iucv_unregister_dbf_views(); | |
491 | return -ENOMEM; | |
492 | } | |
493 | debug_register_view(iucv_dbf_setup, &debug_hex_ascii_view); | |
494 | debug_set_level(iucv_dbf_setup, IUCV_DBF_SETUP_LEVEL); | |
495 | ||
496 | debug_register_view(iucv_dbf_data, &debug_hex_ascii_view); | |
497 | debug_set_level(iucv_dbf_data, IUCV_DBF_DATA_LEVEL); | |
498 | ||
499 | debug_register_view(iucv_dbf_trace, &debug_hex_ascii_view); | |
500 | debug_set_level(iucv_dbf_trace, IUCV_DBF_TRACE_LEVEL); | |
501 | ||
502 | return 0; | |
503 | } | |
504 | ||
eebce385 | 505 | /* |
1da177e4 | 506 | * Callback-wrappers, called from lowlevel iucv layer. |
eebce385 | 507 | */ |
1da177e4 | 508 | |
eebce385 MS |
509 | static void netiucv_callback_rx(struct iucv_path *path, |
510 | struct iucv_message *msg) | |
1da177e4 | 511 | { |
eebce385 | 512 | struct iucv_connection *conn = path->private; |
1da177e4 LT |
513 | struct iucv_event ev; |
514 | ||
515 | ev.conn = conn; | |
eebce385 | 516 | ev.data = msg; |
1da177e4 LT |
517 | fsm_event(conn->fsm, CONN_EVENT_RX, &ev); |
518 | } | |
519 | ||
eebce385 MS |
520 | static void netiucv_callback_txdone(struct iucv_path *path, |
521 | struct iucv_message *msg) | |
1da177e4 | 522 | { |
eebce385 | 523 | struct iucv_connection *conn = path->private; |
1da177e4 LT |
524 | struct iucv_event ev; |
525 | ||
526 | ev.conn = conn; | |
eebce385 | 527 | ev.data = msg; |
1da177e4 LT |
528 | fsm_event(conn->fsm, CONN_EVENT_TXDONE, &ev); |
529 | } | |
530 | ||
eebce385 | 531 | static void netiucv_callback_connack(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 532 | { |
eebce385 | 533 | struct iucv_connection *conn = path->private; |
1da177e4 | 534 | |
eebce385 | 535 | fsm_event(conn->fsm, CONN_EVENT_CONN_ACK, conn); |
1da177e4 LT |
536 | } |
537 | ||
eebce385 MS |
538 | static int netiucv_callback_connreq(struct iucv_path *path, |
539 | u8 ipvmid[8], u8 ipuser[16]) | |
1da177e4 | 540 | { |
eebce385 | 541 | struct iucv_connection *conn = path->private; |
1da177e4 | 542 | struct iucv_event ev; |
eebce385 | 543 | int rc; |
1da177e4 | 544 | |
eebce385 MS |
545 | if (memcmp(iucvMagic, ipuser, sizeof(ipuser))) |
546 | /* ipuser must match iucvMagic. */ | |
547 | return -EINVAL; | |
548 | rc = -EINVAL; | |
549 | read_lock_bh(&iucv_connection_rwlock); | |
550 | list_for_each_entry(conn, &iucv_connection_list, list) { | |
551 | if (strncmp(ipvmid, conn->userid, 8)) | |
552 | continue; | |
553 | /* Found a matching connection for this path. */ | |
554 | conn->path = path; | |
555 | ev.conn = conn; | |
556 | ev.data = path; | |
557 | fsm_event(conn->fsm, CONN_EVENT_CONN_REQ, &ev); | |
558 | rc = 0; | |
559 | } | |
560 | read_unlock_bh(&iucv_connection_rwlock); | |
561 | return rc; | |
1da177e4 LT |
562 | } |
563 | ||
eebce385 | 564 | static void netiucv_callback_connrej(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 565 | { |
eebce385 | 566 | struct iucv_connection *conn = path->private; |
1da177e4 | 567 | |
eebce385 | 568 | fsm_event(conn->fsm, CONN_EVENT_CONN_REJ, conn); |
1da177e4 LT |
569 | } |
570 | ||
eebce385 | 571 | static void netiucv_callback_connsusp(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 572 | { |
eebce385 | 573 | struct iucv_connection *conn = path->private; |
1da177e4 | 574 | |
eebce385 | 575 | fsm_event(conn->fsm, CONN_EVENT_CONN_SUS, conn); |
1da177e4 LT |
576 | } |
577 | ||
eebce385 | 578 | static void netiucv_callback_connres(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 579 | { |
eebce385 | 580 | struct iucv_connection *conn = path->private; |
1da177e4 | 581 | |
eebce385 MS |
582 | fsm_event(conn->fsm, CONN_EVENT_CONN_RES, conn); |
583 | } | |
1da177e4 LT |
584 | |
585 | /** | |
21b26f2f | 586 | * NOP action for statemachines |
1da177e4 | 587 | */ |
21b26f2f | 588 | static void netiucv_action_nop(fsm_instance *fi, int event, void *arg) |
1da177e4 LT |
589 | { |
590 | } | |
e82b0f2c | 591 | |
eebce385 | 592 | /* |
1da177e4 | 593 | * Actions of the connection statemachine |
eebce385 | 594 | */ |
1da177e4 LT |
595 | |
596 | /** | |
eebce385 MS |
597 | * netiucv_unpack_skb |
598 | * @conn: The connection where this skb has been received. | |
599 | * @pskb: The received skb. | |
1da177e4 | 600 | * |
eebce385 MS |
601 | * Unpack a just received skb and hand it over to upper layers. |
602 | * Helper function for conn_action_rx. | |
1da177e4 | 603 | */ |
eebce385 MS |
604 | static void netiucv_unpack_skb(struct iucv_connection *conn, |
605 | struct sk_buff *pskb) | |
1da177e4 LT |
606 | { |
607 | struct net_device *dev = conn->netdev; | |
eebce385 MS |
608 | struct netiucv_priv *privptr = netdev_priv(dev); |
609 | u16 offset = 0; | |
1da177e4 LT |
610 | |
611 | skb_put(pskb, NETIUCV_HDRLEN); | |
612 | pskb->dev = dev; | |
613 | pskb->ip_summed = CHECKSUM_NONE; | |
614 | pskb->protocol = ntohs(ETH_P_IP); | |
615 | ||
616 | while (1) { | |
617 | struct sk_buff *skb; | |
eebce385 | 618 | struct ll_header *header = (struct ll_header *) pskb->data; |
1da177e4 LT |
619 | |
620 | if (!header->next) | |
621 | break; | |
622 | ||
623 | skb_pull(pskb, NETIUCV_HDRLEN); | |
624 | header->next -= offset; | |
625 | offset += header->next; | |
626 | header->next -= NETIUCV_HDRLEN; | |
627 | if (skb_tailroom(pskb) < header->next) { | |
628 | PRINT_WARN("%s: Illegal next field in iucv header: " | |
629 | "%d > %d\n", | |
630 | dev->name, header->next, skb_tailroom(pskb)); | |
631 | IUCV_DBF_TEXT_(data, 2, "Illegal next field: %d > %d\n", | |
632 | header->next, skb_tailroom(pskb)); | |
633 | return; | |
634 | } | |
635 | skb_put(pskb, header->next); | |
459a98ed | 636 | skb_reset_mac_header(pskb); |
1da177e4 LT |
637 | skb = dev_alloc_skb(pskb->len); |
638 | if (!skb) { | |
639 | PRINT_WARN("%s Out of memory in netiucv_unpack_skb\n", | |
640 | dev->name); | |
641 | IUCV_DBF_TEXT(data, 2, | |
642 | "Out of memory in netiucv_unpack_skb\n"); | |
643 | privptr->stats.rx_dropped++; | |
644 | return; | |
645 | } | |
d626f62b ACM |
646 | skb_copy_from_linear_data(pskb, skb_put(skb, pskb->len), |
647 | pskb->len); | |
459a98ed | 648 | skb_reset_mac_header(skb); |
1da177e4 LT |
649 | skb->dev = pskb->dev; |
650 | skb->protocol = pskb->protocol; | |
651 | pskb->ip_summed = CHECKSUM_UNNECESSARY; | |
9b3efc01 JL |
652 | privptr->stats.rx_packets++; |
653 | privptr->stats.rx_bytes += skb->len; | |
1da177e4 LT |
654 | /* |
655 | * Since receiving is always initiated from a tasklet (in iucv.c), | |
656 | * we must use netif_rx_ni() instead of netif_rx() | |
657 | */ | |
658 | netif_rx_ni(skb); | |
659 | dev->last_rx = jiffies; | |
1da177e4 LT |
660 | skb_pull(pskb, header->next); |
661 | skb_put(pskb, NETIUCV_HDRLEN); | |
662 | } | |
663 | } | |
664 | ||
eebce385 | 665 | static void conn_action_rx(fsm_instance *fi, int event, void *arg) |
1da177e4 | 666 | { |
eebce385 | 667 | struct iucv_event *ev = arg; |
1da177e4 | 668 | struct iucv_connection *conn = ev->conn; |
eebce385 MS |
669 | struct iucv_message *msg = ev->data; |
670 | struct netiucv_priv *privptr = netdev_priv(conn->netdev); | |
1da177e4 LT |
671 | int rc; |
672 | ||
2a2cf6b1 | 673 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
674 | |
675 | if (!conn->netdev) { | |
eebce385 | 676 | iucv_message_reject(conn->path, msg); |
1da177e4 LT |
677 | PRINT_WARN("Received data for unlinked connection\n"); |
678 | IUCV_DBF_TEXT(data, 2, | |
eebce385 | 679 | "Received data for unlinked connection\n"); |
1da177e4 LT |
680 | return; |
681 | } | |
eebce385 MS |
682 | if (msg->length > conn->max_buffsize) { |
683 | iucv_message_reject(conn->path, msg); | |
1da177e4 LT |
684 | privptr->stats.rx_dropped++; |
685 | PRINT_WARN("msglen %d > max_buffsize %d\n", | |
eebce385 | 686 | msg->length, conn->max_buffsize); |
1da177e4 | 687 | IUCV_DBF_TEXT_(data, 2, "msglen %d > max_buffsize %d\n", |
eebce385 | 688 | msg->length, conn->max_buffsize); |
1da177e4 LT |
689 | return; |
690 | } | |
27a884dc ACM |
691 | conn->rx_buff->data = conn->rx_buff->head; |
692 | skb_reset_tail_pointer(conn->rx_buff); | |
1da177e4 | 693 | conn->rx_buff->len = 0; |
eebce385 MS |
694 | rc = iucv_message_receive(conn->path, msg, 0, conn->rx_buff->data, |
695 | msg->length, NULL); | |
696 | if (rc || msg->length < 5) { | |
1da177e4 LT |
697 | privptr->stats.rx_errors++; |
698 | PRINT_WARN("iucv_receive returned %08x\n", rc); | |
699 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_receive\n", rc); | |
700 | return; | |
701 | } | |
702 | netiucv_unpack_skb(conn, conn->rx_buff); | |
703 | } | |
704 | ||
eebce385 | 705 | static void conn_action_txdone(fsm_instance *fi, int event, void *arg) |
1da177e4 | 706 | { |
eebce385 | 707 | struct iucv_event *ev = arg; |
1da177e4 | 708 | struct iucv_connection *conn = ev->conn; |
eebce385 MS |
709 | struct iucv_message *msg = ev->data; |
710 | struct iucv_message txmsg; | |
1da177e4 | 711 | struct netiucv_priv *privptr = NULL; |
eebce385 MS |
712 | u32 single_flag = msg->tag; |
713 | u32 txbytes = 0; | |
714 | u32 txpackets = 0; | |
715 | u32 stat_maxcq = 0; | |
1da177e4 LT |
716 | struct sk_buff *skb; |
717 | unsigned long saveflags; | |
eebce385 MS |
718 | struct ll_header header; |
719 | int rc; | |
1da177e4 | 720 | |
2a2cf6b1 | 721 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 | 722 | |
eebce385 MS |
723 | if (conn && conn->netdev) |
724 | privptr = netdev_priv(conn->netdev); | |
1da177e4 LT |
725 | conn->prof.tx_pending--; |
726 | if (single_flag) { | |
727 | if ((skb = skb_dequeue(&conn->commit_queue))) { | |
728 | atomic_dec(&skb->users); | |
729 | dev_kfree_skb_any(skb); | |
730 | if (privptr) { | |
731 | privptr->stats.tx_packets++; | |
732 | privptr->stats.tx_bytes += | |
733 | (skb->len - NETIUCV_HDRLEN | |
734 | - NETIUCV_HDRLEN); | |
735 | } | |
736 | } | |
737 | } | |
27a884dc ACM |
738 | conn->tx_buff->data = conn->tx_buff->head; |
739 | skb_reset_tail_pointer(conn->tx_buff); | |
1da177e4 LT |
740 | conn->tx_buff->len = 0; |
741 | spin_lock_irqsave(&conn->collect_lock, saveflags); | |
742 | while ((skb = skb_dequeue(&conn->collect_queue))) { | |
743 | header.next = conn->tx_buff->len + skb->len + NETIUCV_HDRLEN; | |
744 | memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, | |
745 | NETIUCV_HDRLEN); | |
d626f62b ACM |
746 | skb_copy_from_linear_data(skb, |
747 | skb_put(conn->tx_buff, skb->len), | |
748 | skb->len); | |
1da177e4 LT |
749 | txbytes += skb->len; |
750 | txpackets++; | |
751 | stat_maxcq++; | |
752 | atomic_dec(&skb->users); | |
753 | dev_kfree_skb_any(skb); | |
754 | } | |
755 | if (conn->collect_len > conn->prof.maxmulti) | |
756 | conn->prof.maxmulti = conn->collect_len; | |
757 | conn->collect_len = 0; | |
758 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); | |
eebce385 MS |
759 | if (conn->tx_buff->len == 0) { |
760 | fsm_newstate(fi, CONN_STATE_IDLE); | |
761 | return; | |
762 | } | |
1da177e4 | 763 | |
eebce385 MS |
764 | header.next = 0; |
765 | memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
2c6b47de | 766 | conn->prof.send_stamp = current_kernel_time(); |
eebce385 MS |
767 | txmsg.class = 0; |
768 | txmsg.tag = 0; | |
769 | rc = iucv_message_send(conn->path, &txmsg, 0, 0, | |
1da177e4 | 770 | conn->tx_buff->data, conn->tx_buff->len); |
eebce385 MS |
771 | conn->prof.doios_multi++; |
772 | conn->prof.txlen += conn->tx_buff->len; | |
773 | conn->prof.tx_pending++; | |
774 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) | |
775 | conn->prof.tx_max_pending = conn->prof.tx_pending; | |
776 | if (rc) { | |
777 | conn->prof.tx_pending--; | |
1da177e4 | 778 | fsm_newstate(fi, CONN_STATE_IDLE); |
eebce385 MS |
779 | if (privptr) |
780 | privptr->stats.tx_errors += txpackets; | |
781 | PRINT_WARN("iucv_send returned %08x\n", rc); | |
782 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); | |
783 | } else { | |
784 | if (privptr) { | |
785 | privptr->stats.tx_packets += txpackets; | |
786 | privptr->stats.tx_bytes += txbytes; | |
787 | } | |
788 | if (stat_maxcq > conn->prof.maxcqueue) | |
789 | conn->prof.maxcqueue = stat_maxcq; | |
790 | } | |
1da177e4 LT |
791 | } |
792 | ||
eebce385 | 793 | static void conn_action_connaccept(fsm_instance *fi, int event, void *arg) |
1da177e4 | 794 | { |
eebce385 | 795 | struct iucv_event *ev = arg; |
1da177e4 | 796 | struct iucv_connection *conn = ev->conn; |
eebce385 | 797 | struct iucv_path *path = ev->data; |
1da177e4 | 798 | struct net_device *netdev = conn->netdev; |
eebce385 | 799 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 800 | int rc; |
1da177e4 | 801 | |
2a2cf6b1 | 802 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 803 | |
eebce385 MS |
804 | conn->path = path; |
805 | path->msglim = NETIUCV_QUEUELEN_DEFAULT; | |
806 | path->flags = 0; | |
807 | rc = iucv_path_accept(path, &netiucv_handler, NULL, conn); | |
1da177e4 LT |
808 | if (rc) { |
809 | PRINT_WARN("%s: IUCV accept failed with error %d\n", | |
810 | netdev->name, rc); | |
811 | IUCV_DBF_TEXT_(setup, 2, "rc %d from iucv_accept", rc); | |
812 | return; | |
813 | } | |
814 | fsm_newstate(fi, CONN_STATE_IDLE); | |
eebce385 | 815 | netdev->tx_queue_len = conn->path->msglim; |
1da177e4 LT |
816 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); |
817 | } | |
818 | ||
eebce385 | 819 | static void conn_action_connreject(fsm_instance *fi, int event, void *arg) |
1da177e4 | 820 | { |
eebce385 MS |
821 | struct iucv_event *ev = arg; |
822 | struct iucv_path *path = ev->data; | |
1da177e4 | 823 | |
2a2cf6b1 | 824 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 | 825 | iucv_path_sever(path, NULL); |
1da177e4 LT |
826 | } |
827 | ||
eebce385 | 828 | static void conn_action_connack(fsm_instance *fi, int event, void *arg) |
1da177e4 | 829 | { |
eebce385 | 830 | struct iucv_connection *conn = arg; |
1da177e4 | 831 | struct net_device *netdev = conn->netdev; |
eebce385 | 832 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 833 | |
2a2cf6b1 | 834 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
835 | fsm_deltimer(&conn->timer); |
836 | fsm_newstate(fi, CONN_STATE_IDLE); | |
eebce385 | 837 | netdev->tx_queue_len = conn->path->msglim; |
1da177e4 LT |
838 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); |
839 | } | |
840 | ||
eebce385 | 841 | static void conn_action_conntimsev(fsm_instance *fi, int event, void *arg) |
1da177e4 | 842 | { |
eebce385 | 843 | struct iucv_connection *conn = arg; |
1da177e4 | 844 | |
2a2cf6b1 | 845 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 846 | fsm_deltimer(&conn->timer); |
eebce385 | 847 | iucv_path_sever(conn->path, NULL); |
1da177e4 LT |
848 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
849 | } | |
850 | ||
eebce385 | 851 | static void conn_action_connsever(fsm_instance *fi, int event, void *arg) |
1da177e4 | 852 | { |
eebce385 | 853 | struct iucv_connection *conn = arg; |
1da177e4 | 854 | struct net_device *netdev = conn->netdev; |
eebce385 | 855 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 856 | |
2a2cf6b1 | 857 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
858 | |
859 | fsm_deltimer(&conn->timer); | |
eebce385 | 860 | iucv_path_sever(conn->path, NULL); |
1da177e4 LT |
861 | PRINT_INFO("%s: Remote dropped connection\n", netdev->name); |
862 | IUCV_DBF_TEXT(data, 2, | |
eebce385 | 863 | "conn_action_connsever: Remote dropped connection\n"); |
1da177e4 LT |
864 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
865 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); | |
866 | } | |
867 | ||
eebce385 | 868 | static void conn_action_start(fsm_instance *fi, int event, void *arg) |
1da177e4 | 869 | { |
eebce385 | 870 | struct iucv_connection *conn = arg; |
1da177e4 LT |
871 | int rc; |
872 | ||
2a2cf6b1 | 873 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 874 | |
eebce385 | 875 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
1da177e4 | 876 | PRINT_DEBUG("%s('%s'): connecting ...\n", |
eebce385 | 877 | conn->netdev->name, conn->userid); |
1da177e4 | 878 | |
eebce385 MS |
879 | /* |
880 | * We must set the state before calling iucv_connect because the | |
881 | * callback handler could be called at any point after the connection | |
882 | * request is sent | |
883 | */ | |
1da177e4 LT |
884 | |
885 | fsm_newstate(fi, CONN_STATE_SETUPWAIT); | |
eebce385 MS |
886 | conn->path = iucv_path_alloc(NETIUCV_QUEUELEN_DEFAULT, 0, GFP_KERNEL); |
887 | rc = iucv_path_connect(conn->path, &netiucv_handler, conn->userid, | |
888 | NULL, iucvMagic, conn); | |
1da177e4 | 889 | switch (rc) { |
eebce385 MS |
890 | case 0: |
891 | conn->netdev->tx_queue_len = conn->path->msglim; | |
892 | fsm_addtimer(&conn->timer, NETIUCV_TIMEOUT_5SEC, | |
893 | CONN_EVENT_TIMER, conn); | |
894 | return; | |
895 | case 11: | |
896 | PRINT_INFO("%s: User %s is currently not available.\n", | |
897 | conn->netdev->name, | |
898 | netiucv_printname(conn->userid)); | |
899 | fsm_newstate(fi, CONN_STATE_STARTWAIT); | |
900 | break; | |
901 | case 12: | |
902 | PRINT_INFO("%s: User %s is currently not ready.\n", | |
903 | conn->netdev->name, | |
904 | netiucv_printname(conn->userid)); | |
905 | fsm_newstate(fi, CONN_STATE_STARTWAIT); | |
906 | break; | |
907 | case 13: | |
908 | PRINT_WARN("%s: Too many IUCV connections.\n", | |
909 | conn->netdev->name); | |
910 | fsm_newstate(fi, CONN_STATE_CONNERR); | |
911 | break; | |
912 | case 14: | |
913 | PRINT_WARN("%s: User %s has too many IUCV connections.\n", | |
914 | conn->netdev->name, | |
915 | netiucv_printname(conn->userid)); | |
916 | fsm_newstate(fi, CONN_STATE_CONNERR); | |
917 | break; | |
918 | case 15: | |
919 | PRINT_WARN("%s: No IUCV authorization in CP directory.\n", | |
920 | conn->netdev->name); | |
921 | fsm_newstate(fi, CONN_STATE_CONNERR); | |
922 | break; | |
923 | default: | |
924 | PRINT_WARN("%s: iucv_connect returned error %d\n", | |
925 | conn->netdev->name, rc); | |
926 | fsm_newstate(fi, CONN_STATE_CONNERR); | |
927 | break; | |
1da177e4 LT |
928 | } |
929 | IUCV_DBF_TEXT_(setup, 5, "iucv_connect rc is %d\n", rc); | |
eebce385 MS |
930 | kfree(conn->path); |
931 | conn->path = NULL; | |
1da177e4 LT |
932 | } |
933 | ||
eebce385 | 934 | static void netiucv_purge_skb_queue(struct sk_buff_head *q) |
1da177e4 LT |
935 | { |
936 | struct sk_buff *skb; | |
937 | ||
938 | while ((skb = skb_dequeue(q))) { | |
939 | atomic_dec(&skb->users); | |
940 | dev_kfree_skb_any(skb); | |
941 | } | |
942 | } | |
943 | ||
eebce385 | 944 | static void conn_action_stop(fsm_instance *fi, int event, void *arg) |
1da177e4 | 945 | { |
eebce385 | 946 | struct iucv_event *ev = arg; |
1da177e4 LT |
947 | struct iucv_connection *conn = ev->conn; |
948 | struct net_device *netdev = conn->netdev; | |
eebce385 | 949 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 950 | |
2a2cf6b1 | 951 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
952 | |
953 | fsm_deltimer(&conn->timer); | |
954 | fsm_newstate(fi, CONN_STATE_STOPPED); | |
955 | netiucv_purge_skb_queue(&conn->collect_queue); | |
eebce385 MS |
956 | if (conn->path) { |
957 | IUCV_DBF_TEXT(trace, 5, "calling iucv_path_sever\n"); | |
958 | iucv_path_sever(conn->path, iucvMagic); | |
959 | kfree(conn->path); | |
960 | conn->path = NULL; | |
961 | } | |
1da177e4 LT |
962 | netiucv_purge_skb_queue(&conn->commit_queue); |
963 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); | |
964 | } | |
965 | ||
eebce385 | 966 | static void conn_action_inval(fsm_instance *fi, int event, void *arg) |
1da177e4 | 967 | { |
eebce385 | 968 | struct iucv_connection *conn = arg; |
1da177e4 LT |
969 | struct net_device *netdev = conn->netdev; |
970 | ||
eebce385 | 971 | PRINT_WARN("%s: Cannot connect without username\n", netdev->name); |
1da177e4 LT |
972 | IUCV_DBF_TEXT(data, 2, "conn_action_inval called\n"); |
973 | } | |
974 | ||
975 | static const fsm_node conn_fsm[] = { | |
976 | { CONN_STATE_INVALID, CONN_EVENT_START, conn_action_inval }, | |
977 | { CONN_STATE_STOPPED, CONN_EVENT_START, conn_action_start }, | |
978 | ||
979 | { CONN_STATE_STOPPED, CONN_EVENT_STOP, conn_action_stop }, | |
980 | { CONN_STATE_STARTWAIT, CONN_EVENT_STOP, conn_action_stop }, | |
981 | { CONN_STATE_SETUPWAIT, CONN_EVENT_STOP, conn_action_stop }, | |
982 | { CONN_STATE_IDLE, CONN_EVENT_STOP, conn_action_stop }, | |
983 | { CONN_STATE_TX, CONN_EVENT_STOP, conn_action_stop }, | |
984 | { CONN_STATE_REGERR, CONN_EVENT_STOP, conn_action_stop }, | |
985 | { CONN_STATE_CONNERR, CONN_EVENT_STOP, conn_action_stop }, | |
986 | ||
987 | { CONN_STATE_STOPPED, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
988 | { CONN_STATE_STARTWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, | |
989 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, | |
990 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
991 | { CONN_STATE_TX, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
992 | ||
993 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_ACK, conn_action_connack }, | |
994 | { CONN_STATE_SETUPWAIT, CONN_EVENT_TIMER, conn_action_conntimsev }, | |
995 | ||
996 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
997 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
998 | { CONN_STATE_TX, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
999 | ||
1000 | { CONN_STATE_IDLE, CONN_EVENT_RX, conn_action_rx }, | |
1001 | { CONN_STATE_TX, CONN_EVENT_RX, conn_action_rx }, | |
1002 | ||
1003 | { CONN_STATE_TX, CONN_EVENT_TXDONE, conn_action_txdone }, | |
1004 | { CONN_STATE_IDLE, CONN_EVENT_TXDONE, conn_action_txdone }, | |
1005 | }; | |
1006 | ||
1007 | static const int CONN_FSM_LEN = sizeof(conn_fsm) / sizeof(fsm_node); | |
1008 | ||
e82b0f2c | 1009 | |
eebce385 | 1010 | /* |
1da177e4 | 1011 | * Actions for interface - statemachine. |
eebce385 | 1012 | */ |
1da177e4 LT |
1013 | |
1014 | /** | |
eebce385 MS |
1015 | * dev_action_start |
1016 | * @fi: An instance of an interface statemachine. | |
1017 | * @event: The event, just happened. | |
1018 | * @arg: Generic pointer, casted from struct net_device * upon call. | |
1da177e4 | 1019 | * |
eebce385 | 1020 | * Startup connection by sending CONN_EVENT_START to it. |
1da177e4 | 1021 | */ |
eebce385 | 1022 | static void dev_action_start(fsm_instance *fi, int event, void *arg) |
1da177e4 | 1023 | { |
eebce385 MS |
1024 | struct net_device *dev = arg; |
1025 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 | 1026 | |
2a2cf6b1 | 1027 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 1028 | |
1da177e4 | 1029 | fsm_newstate(fi, DEV_STATE_STARTWAIT); |
eebce385 | 1030 | fsm_event(privptr->conn->fsm, CONN_EVENT_START, privptr->conn); |
1da177e4 LT |
1031 | } |
1032 | ||
1033 | /** | |
1034 | * Shutdown connection by sending CONN_EVENT_STOP to it. | |
1035 | * | |
1036 | * @param fi An instance of an interface statemachine. | |
1037 | * @param event The event, just happened. | |
1038 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1039 | */ | |
1040 | static void | |
1041 | dev_action_stop(fsm_instance *fi, int event, void *arg) | |
1042 | { | |
eebce385 MS |
1043 | struct net_device *dev = arg; |
1044 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 LT |
1045 | struct iucv_event ev; |
1046 | ||
2a2cf6b1 | 1047 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1048 | |
1049 | ev.conn = privptr->conn; | |
1050 | ||
1051 | fsm_newstate(fi, DEV_STATE_STOPWAIT); | |
1052 | fsm_event(privptr->conn->fsm, CONN_EVENT_STOP, &ev); | |
1053 | } | |
1054 | ||
1055 | /** | |
1056 | * Called from connection statemachine | |
1057 | * when a connection is up and running. | |
1058 | * | |
1059 | * @param fi An instance of an interface statemachine. | |
1060 | * @param event The event, just happened. | |
1061 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1062 | */ | |
1063 | static void | |
1064 | dev_action_connup(fsm_instance *fi, int event, void *arg) | |
1065 | { | |
eebce385 MS |
1066 | struct net_device *dev = arg; |
1067 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 | 1068 | |
2a2cf6b1 | 1069 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1070 | |
1071 | switch (fsm_getstate(fi)) { | |
1072 | case DEV_STATE_STARTWAIT: | |
1073 | fsm_newstate(fi, DEV_STATE_RUNNING); | |
1074 | PRINT_INFO("%s: connected with remote side %s\n", | |
1075 | dev->name, privptr->conn->userid); | |
1076 | IUCV_DBF_TEXT(setup, 3, | |
1077 | "connection is up and running\n"); | |
1078 | break; | |
1079 | case DEV_STATE_STOPWAIT: | |
1080 | PRINT_INFO( | |
1081 | "%s: got connection UP event during shutdown!\n", | |
1082 | dev->name); | |
1083 | IUCV_DBF_TEXT(data, 2, | |
1084 | "dev_action_connup: in DEV_STATE_STOPWAIT\n"); | |
1085 | break; | |
1086 | } | |
1087 | } | |
1088 | ||
1089 | /** | |
1090 | * Called from connection statemachine | |
1091 | * when a connection has been shutdown. | |
1092 | * | |
1093 | * @param fi An instance of an interface statemachine. | |
1094 | * @param event The event, just happened. | |
1095 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1096 | */ | |
1097 | static void | |
1098 | dev_action_conndown(fsm_instance *fi, int event, void *arg) | |
1099 | { | |
2a2cf6b1 | 1100 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1101 | |
1102 | switch (fsm_getstate(fi)) { | |
1103 | case DEV_STATE_RUNNING: | |
1104 | fsm_newstate(fi, DEV_STATE_STARTWAIT); | |
1105 | break; | |
1106 | case DEV_STATE_STOPWAIT: | |
1107 | fsm_newstate(fi, DEV_STATE_STOPPED); | |
1108 | IUCV_DBF_TEXT(setup, 3, "connection is down\n"); | |
1109 | break; | |
1110 | } | |
1111 | } | |
1112 | ||
1113 | static const fsm_node dev_fsm[] = { | |
1114 | { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start }, | |
1115 | ||
1116 | { DEV_STATE_STOPWAIT, DEV_EVENT_START, dev_action_start }, | |
1117 | { DEV_STATE_STOPWAIT, DEV_EVENT_CONDOWN, dev_action_conndown }, | |
1118 | ||
1119 | { DEV_STATE_STARTWAIT, DEV_EVENT_STOP, dev_action_stop }, | |
1120 | { DEV_STATE_STARTWAIT, DEV_EVENT_CONUP, dev_action_connup }, | |
1121 | ||
1122 | { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop }, | |
1123 | { DEV_STATE_RUNNING, DEV_EVENT_CONDOWN, dev_action_conndown }, | |
21b26f2f | 1124 | { DEV_STATE_RUNNING, DEV_EVENT_CONUP, netiucv_action_nop }, |
1da177e4 LT |
1125 | }; |
1126 | ||
1127 | static const int DEV_FSM_LEN = sizeof(dev_fsm) / sizeof(fsm_node); | |
1128 | ||
1129 | /** | |
1130 | * Transmit a packet. | |
1131 | * This is a helper function for netiucv_tx(). | |
1132 | * | |
1133 | * @param conn Connection to be used for sending. | |
1134 | * @param skb Pointer to struct sk_buff of packet to send. | |
1135 | * The linklevel header has already been set up | |
1136 | * by netiucv_tx(). | |
1137 | * | |
1138 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1139 | */ | |
eebce385 MS |
1140 | static int netiucv_transmit_skb(struct iucv_connection *conn, |
1141 | struct sk_buff *skb) | |
1142 | { | |
1143 | struct iucv_message msg; | |
1da177e4 | 1144 | unsigned long saveflags; |
eebce385 MS |
1145 | struct ll_header header; |
1146 | int rc; | |
1da177e4 LT |
1147 | |
1148 | if (fsm_getstate(conn->fsm) != CONN_STATE_IDLE) { | |
1149 | int l = skb->len + NETIUCV_HDRLEN; | |
1150 | ||
1151 | spin_lock_irqsave(&conn->collect_lock, saveflags); | |
1152 | if (conn->collect_len + l > | |
1153 | (conn->max_buffsize - NETIUCV_HDRLEN)) { | |
1154 | rc = -EBUSY; | |
1155 | IUCV_DBF_TEXT(data, 2, | |
eebce385 | 1156 | "EBUSY from netiucv_transmit_skb\n"); |
1da177e4 LT |
1157 | } else { |
1158 | atomic_inc(&skb->users); | |
1159 | skb_queue_tail(&conn->collect_queue, skb); | |
1160 | conn->collect_len += l; | |
eebce385 | 1161 | rc = 0; |
1da177e4 LT |
1162 | } |
1163 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); | |
1164 | } else { | |
1165 | struct sk_buff *nskb = skb; | |
1166 | /** | |
1167 | * Copy the skb to a new allocated skb in lowmem only if the | |
1168 | * data is located above 2G in memory or tailroom is < 2. | |
1169 | */ | |
27a884dc ACM |
1170 | unsigned long hi = ((unsigned long)(skb_tail_pointer(skb) + |
1171 | NETIUCV_HDRLEN)) >> 31; | |
1da177e4 LT |
1172 | int copied = 0; |
1173 | if (hi || (skb_tailroom(skb) < 2)) { | |
1174 | nskb = alloc_skb(skb->len + NETIUCV_HDRLEN + | |
1175 | NETIUCV_HDRLEN, GFP_ATOMIC | GFP_DMA); | |
1176 | if (!nskb) { | |
1177 | PRINT_WARN("%s: Could not allocate tx_skb\n", | |
1178 | conn->netdev->name); | |
1179 | IUCV_DBF_TEXT(data, 2, "alloc_skb failed\n"); | |
1180 | rc = -ENOMEM; | |
1181 | return rc; | |
1182 | } else { | |
1183 | skb_reserve(nskb, NETIUCV_HDRLEN); | |
1184 | memcpy(skb_put(nskb, skb->len), | |
1185 | skb->data, skb->len); | |
1186 | } | |
1187 | copied = 1; | |
1188 | } | |
1189 | /** | |
1190 | * skb now is below 2G and has enough room. Add headers. | |
1191 | */ | |
1192 | header.next = nskb->len + NETIUCV_HDRLEN; | |
1193 | memcpy(skb_push(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
1194 | header.next = 0; | |
1195 | memcpy(skb_put(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
1196 | ||
1197 | fsm_newstate(conn->fsm, CONN_STATE_TX); | |
2c6b47de | 1198 | conn->prof.send_stamp = current_kernel_time(); |
e82b0f2c | 1199 | |
eebce385 MS |
1200 | msg.tag = 1; |
1201 | msg.class = 0; | |
1202 | rc = iucv_message_send(conn->path, &msg, 0, 0, | |
1203 | nskb->data, nskb->len); | |
1da177e4 LT |
1204 | conn->prof.doios_single++; |
1205 | conn->prof.txlen += skb->len; | |
1206 | conn->prof.tx_pending++; | |
1207 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) | |
1208 | conn->prof.tx_max_pending = conn->prof.tx_pending; | |
1209 | if (rc) { | |
1210 | struct netiucv_priv *privptr; | |
1211 | fsm_newstate(conn->fsm, CONN_STATE_IDLE); | |
1212 | conn->prof.tx_pending--; | |
eebce385 | 1213 | privptr = netdev_priv(conn->netdev); |
1da177e4 LT |
1214 | if (privptr) |
1215 | privptr->stats.tx_errors++; | |
1216 | if (copied) | |
1217 | dev_kfree_skb(nskb); | |
1218 | else { | |
1219 | /** | |
1220 | * Remove our headers. They get added | |
1221 | * again on retransmit. | |
1222 | */ | |
1223 | skb_pull(skb, NETIUCV_HDRLEN); | |
1224 | skb_trim(skb, skb->len - NETIUCV_HDRLEN); | |
1225 | } | |
1226 | PRINT_WARN("iucv_send returned %08x\n", rc); | |
1227 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); | |
1228 | } else { | |
1229 | if (copied) | |
1230 | dev_kfree_skb(skb); | |
1231 | atomic_inc(&nskb->users); | |
1232 | skb_queue_tail(&conn->commit_queue, nskb); | |
1233 | } | |
1234 | } | |
1235 | ||
1236 | return rc; | |
1237 | } | |
e82b0f2c | 1238 | |
eebce385 | 1239 | /* |
1da177e4 | 1240 | * Interface API for upper network layers |
eebce385 | 1241 | */ |
1da177e4 LT |
1242 | |
1243 | /** | |
1244 | * Open an interface. | |
1245 | * Called from generic network layer when ifconfig up is run. | |
1246 | * | |
1247 | * @param dev Pointer to interface struct. | |
1248 | * | |
1249 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1250 | */ | |
eebce385 MS |
1251 | static int netiucv_open(struct net_device *dev) |
1252 | { | |
1253 | struct netiucv_priv *priv = netdev_priv(dev); | |
1254 | ||
1255 | fsm_event(priv->fsm, DEV_EVENT_START, dev); | |
1da177e4 LT |
1256 | return 0; |
1257 | } | |
1258 | ||
1259 | /** | |
1260 | * Close an interface. | |
1261 | * Called from generic network layer when ifconfig down is run. | |
1262 | * | |
1263 | * @param dev Pointer to interface struct. | |
1264 | * | |
1265 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1266 | */ | |
eebce385 MS |
1267 | static int netiucv_close(struct net_device *dev) |
1268 | { | |
1269 | struct netiucv_priv *priv = netdev_priv(dev); | |
1270 | ||
1271 | fsm_event(priv->fsm, DEV_EVENT_STOP, dev); | |
1da177e4 LT |
1272 | return 0; |
1273 | } | |
1274 | ||
1275 | /** | |
1276 | * Start transmission of a packet. | |
1277 | * Called from generic network device layer. | |
1278 | * | |
1279 | * @param skb Pointer to buffer containing the packet. | |
1280 | * @param dev Pointer to interface struct. | |
1281 | * | |
1282 | * @return 0 if packet consumed, !0 if packet rejected. | |
1283 | * Note: If we return !0, then the packet is free'd by | |
1284 | * the generic network layer. | |
1285 | */ | |
1286 | static int netiucv_tx(struct sk_buff *skb, struct net_device *dev) | |
1287 | { | |
eebce385 MS |
1288 | struct netiucv_priv *privptr = netdev_priv(dev); |
1289 | int rc; | |
1da177e4 | 1290 | |
2a2cf6b1 | 1291 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1292 | /** |
1293 | * Some sanity checks ... | |
1294 | */ | |
1295 | if (skb == NULL) { | |
1296 | PRINT_WARN("%s: NULL sk_buff passed\n", dev->name); | |
1297 | IUCV_DBF_TEXT(data, 2, "netiucv_tx: skb is NULL\n"); | |
1298 | privptr->stats.tx_dropped++; | |
1299 | return 0; | |
1300 | } | |
1301 | if (skb_headroom(skb) < NETIUCV_HDRLEN) { | |
1302 | PRINT_WARN("%s: Got sk_buff with head room < %ld bytes\n", | |
1303 | dev->name, NETIUCV_HDRLEN); | |
1304 | IUCV_DBF_TEXT(data, 2, | |
1305 | "netiucv_tx: skb_headroom < NETIUCV_HDRLEN\n"); | |
1306 | dev_kfree_skb(skb); | |
1307 | privptr->stats.tx_dropped++; | |
1308 | return 0; | |
1309 | } | |
1310 | ||
1311 | /** | |
1312 | * If connection is not running, try to restart it | |
e82b0f2c | 1313 | * and throw away packet. |
1da177e4 LT |
1314 | */ |
1315 | if (fsm_getstate(privptr->fsm) != DEV_STATE_RUNNING) { | |
1da177e4 LT |
1316 | dev_kfree_skb(skb); |
1317 | privptr->stats.tx_dropped++; | |
1318 | privptr->stats.tx_errors++; | |
1319 | privptr->stats.tx_carrier_errors++; | |
1320 | return 0; | |
1321 | } | |
1322 | ||
1323 | if (netiucv_test_and_set_busy(dev)) { | |
1324 | IUCV_DBF_TEXT(data, 2, "EBUSY from netiucv_tx\n"); | |
1325 | return -EBUSY; | |
1326 | } | |
1327 | dev->trans_start = jiffies; | |
eebce385 | 1328 | rc = netiucv_transmit_skb(privptr->conn, skb) != 0; |
1da177e4 LT |
1329 | netiucv_clear_busy(dev); |
1330 | return rc; | |
1331 | } | |
1332 | ||
1333 | /** | |
eebce385 MS |
1334 | * netiucv_stats |
1335 | * @dev: Pointer to interface struct. | |
1da177e4 | 1336 | * |
eebce385 | 1337 | * Returns interface statistics of a device. |
1da177e4 | 1338 | * |
eebce385 | 1339 | * Returns pointer to stats struct of this interface. |
1da177e4 | 1340 | */ |
eebce385 | 1341 | static struct net_device_stats *netiucv_stats (struct net_device * dev) |
1da177e4 | 1342 | { |
eebce385 MS |
1343 | struct netiucv_priv *priv = netdev_priv(dev); |
1344 | ||
2a2cf6b1 | 1345 | IUCV_DBF_TEXT(trace, 5, __func__); |
eebce385 | 1346 | return &priv->stats; |
1da177e4 LT |
1347 | } |
1348 | ||
1349 | /** | |
eebce385 MS |
1350 | * netiucv_change_mtu |
1351 | * @dev: Pointer to interface struct. | |
1352 | * @new_mtu: The new MTU to use for this interface. | |
1da177e4 | 1353 | * |
eebce385 | 1354 | * Sets MTU of an interface. |
1da177e4 | 1355 | * |
eebce385 | 1356 | * Returns 0 on success, -EINVAL if MTU is out of valid range. |
1da177e4 LT |
1357 | * (valid range is 576 .. NETIUCV_MTU_MAX). |
1358 | */ | |
eebce385 | 1359 | static int netiucv_change_mtu(struct net_device * dev, int new_mtu) |
1da177e4 | 1360 | { |
2a2cf6b1 | 1361 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 | 1362 | if (new_mtu < 576 || new_mtu > NETIUCV_MTU_MAX) { |
1da177e4 LT |
1363 | IUCV_DBF_TEXT(setup, 2, "given MTU out of valid range\n"); |
1364 | return -EINVAL; | |
1365 | } | |
1366 | dev->mtu = new_mtu; | |
1367 | return 0; | |
1368 | } | |
1369 | ||
eebce385 | 1370 | /* |
1da177e4 | 1371 | * attributes in sysfs |
eebce385 | 1372 | */ |
1da177e4 | 1373 | |
eebce385 MS |
1374 | static ssize_t user_show(struct device *dev, struct device_attribute *attr, |
1375 | char *buf) | |
1da177e4 LT |
1376 | { |
1377 | struct netiucv_priv *priv = dev->driver_data; | |
1378 | ||
2a2cf6b1 | 1379 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1380 | return sprintf(buf, "%s\n", netiucv_printname(priv->conn->userid)); |
1381 | } | |
1382 | ||
eebce385 MS |
1383 | static ssize_t user_write(struct device *dev, struct device_attribute *attr, |
1384 | const char *buf, size_t count) | |
1da177e4 LT |
1385 | { |
1386 | struct netiucv_priv *priv = dev->driver_data; | |
1387 | struct net_device *ndev = priv->conn->netdev; | |
1388 | char *p; | |
1389 | char *tmp; | |
16a83b30 | 1390 | char username[9]; |
1da177e4 | 1391 | int i; |
eebce385 | 1392 | struct iucv_connection *cp; |
1da177e4 | 1393 | |
2a2cf6b1 | 1394 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 MS |
1395 | if (count > 9) { |
1396 | PRINT_WARN("netiucv: username too long (%d)!\n", (int) count); | |
1da177e4 | 1397 | IUCV_DBF_TEXT_(setup, 2, |
eebce385 | 1398 | "%d is length of username\n", (int) count); |
1da177e4 LT |
1399 | return -EINVAL; |
1400 | } | |
1401 | ||
1402 | tmp = strsep((char **) &buf, "\n"); | |
eebce385 MS |
1403 | for (i = 0, p = tmp; i < 8 && *p; i++, p++) { |
1404 | if (isalnum(*p) || (*p == '$')) { | |
16a83b30 | 1405 | username[i]= toupper(*p); |
eebce385 MS |
1406 | continue; |
1407 | } | |
1408 | if (*p == '\n') { | |
1da177e4 LT |
1409 | /* trailing lf, grr */ |
1410 | break; | |
1da177e4 | 1411 | } |
eebce385 MS |
1412 | PRINT_WARN("netiucv: Invalid char %c in username!\n", *p); |
1413 | IUCV_DBF_TEXT_(setup, 2, | |
1414 | "username: invalid character %c\n", *p); | |
1415 | return -EINVAL; | |
1da177e4 | 1416 | } |
eebce385 | 1417 | while (i < 8) |
1da177e4 | 1418 | username[i++] = ' '; |
16a83b30 | 1419 | username[8] = '\0'; |
1da177e4 | 1420 | |
eebce385 MS |
1421 | if (memcmp(username, priv->conn->userid, 9) && |
1422 | (ndev->flags & (IFF_UP | IFF_RUNNING))) { | |
1423 | /* username changed while the interface is active. */ | |
1424 | PRINT_WARN("netiucv: device %s active, connected to %s\n", | |
1425 | dev->bus_id, priv->conn->userid); | |
1426 | PRINT_WARN("netiucv: user cannot be updated\n"); | |
1427 | IUCV_DBF_TEXT(setup, 2, "user_write: device active\n"); | |
1428 | return -EBUSY; | |
1429 | } | |
1430 | read_lock_bh(&iucv_connection_rwlock); | |
1431 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
1432 | if (!strncmp(username, cp->userid, 9) && cp->netdev != ndev) { | |
1433 | read_unlock_bh(&iucv_connection_rwlock); | |
1434 | PRINT_WARN("netiucv: Connection to %s already " | |
1435 | "exists\n", username); | |
1436 | return -EEXIST; | |
1da177e4 LT |
1437 | } |
1438 | } | |
eebce385 | 1439 | read_unlock_bh(&iucv_connection_rwlock); |
1da177e4 | 1440 | memcpy(priv->conn->userid, username, 9); |
1da177e4 | 1441 | return count; |
1da177e4 LT |
1442 | } |
1443 | ||
1444 | static DEVICE_ATTR(user, 0644, user_show, user_write); | |
1445 | ||
eebce385 MS |
1446 | static ssize_t buffer_show (struct device *dev, struct device_attribute *attr, |
1447 | char *buf) | |
1448 | { struct netiucv_priv *priv = dev->driver_data; | |
1da177e4 | 1449 | |
2a2cf6b1 | 1450 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1451 | return sprintf(buf, "%d\n", priv->conn->max_buffsize); |
1452 | } | |
1453 | ||
eebce385 MS |
1454 | static ssize_t buffer_write (struct device *dev, struct device_attribute *attr, |
1455 | const char *buf, size_t count) | |
1da177e4 LT |
1456 | { |
1457 | struct netiucv_priv *priv = dev->driver_data; | |
1458 | struct net_device *ndev = priv->conn->netdev; | |
1459 | char *e; | |
1460 | int bs1; | |
1461 | ||
2a2cf6b1 | 1462 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1463 | if (count >= 39) |
1464 | return -EINVAL; | |
1465 | ||
1466 | bs1 = simple_strtoul(buf, &e, 0); | |
1467 | ||
1468 | if (e && (!isspace(*e))) { | |
1469 | PRINT_WARN("netiucv: Invalid character in buffer!\n"); | |
1470 | IUCV_DBF_TEXT_(setup, 2, "buffer_write: invalid char %c\n", *e); | |
1471 | return -EINVAL; | |
1472 | } | |
1473 | if (bs1 > NETIUCV_BUFSIZE_MAX) { | |
1474 | PRINT_WARN("netiucv: Given buffer size %d too large.\n", | |
1475 | bs1); | |
1476 | IUCV_DBF_TEXT_(setup, 2, | |
1477 | "buffer_write: buffer size %d too large\n", | |
1478 | bs1); | |
1479 | return -EINVAL; | |
1480 | } | |
1481 | if ((ndev->flags & IFF_RUNNING) && | |
1482 | (bs1 < (ndev->mtu + NETIUCV_HDRLEN + 2))) { | |
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 | if (bs1 < (576 + NETIUCV_HDRLEN + NETIUCV_HDRLEN)) { | |
1491 | PRINT_WARN("netiucv: Given buffer size %d too small.\n", | |
1492 | bs1); | |
1493 | IUCV_DBF_TEXT_(setup, 2, | |
1494 | "buffer_write: buffer size %d too small\n", | |
1495 | bs1); | |
1496 | return -EINVAL; | |
1497 | } | |
1498 | ||
1499 | priv->conn->max_buffsize = bs1; | |
1500 | if (!(ndev->flags & IFF_RUNNING)) | |
1501 | ndev->mtu = bs1 - NETIUCV_HDRLEN - NETIUCV_HDRLEN; | |
1502 | ||
1503 | return count; | |
1504 | ||
1505 | } | |
1506 | ||
1507 | static DEVICE_ATTR(buffer, 0644, buffer_show, buffer_write); | |
1508 | ||
eebce385 MS |
1509 | static ssize_t dev_fsm_show (struct device *dev, struct device_attribute *attr, |
1510 | char *buf) | |
1da177e4 LT |
1511 | { |
1512 | struct netiucv_priv *priv = dev->driver_data; | |
1513 | ||
2a2cf6b1 | 1514 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1515 | return sprintf(buf, "%s\n", fsm_getstate_str(priv->fsm)); |
1516 | } | |
1517 | ||
1518 | static DEVICE_ATTR(device_fsm_state, 0444, dev_fsm_show, NULL); | |
1519 | ||
eebce385 MS |
1520 | static ssize_t conn_fsm_show (struct device *dev, |
1521 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
1522 | { |
1523 | struct netiucv_priv *priv = dev->driver_data; | |
1524 | ||
2a2cf6b1 | 1525 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1526 | return sprintf(buf, "%s\n", fsm_getstate_str(priv->conn->fsm)); |
1527 | } | |
1528 | ||
1529 | static DEVICE_ATTR(connection_fsm_state, 0444, conn_fsm_show, NULL); | |
1530 | ||
eebce385 MS |
1531 | static ssize_t maxmulti_show (struct device *dev, |
1532 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
1533 | { |
1534 | struct netiucv_priv *priv = dev->driver_data; | |
1535 | ||
2a2cf6b1 | 1536 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1537 | return sprintf(buf, "%ld\n", priv->conn->prof.maxmulti); |
1538 | } | |
1539 | ||
eebce385 MS |
1540 | static ssize_t maxmulti_write (struct device *dev, |
1541 | struct device_attribute *attr, | |
1542 | const char *buf, size_t count) | |
1da177e4 LT |
1543 | { |
1544 | struct netiucv_priv *priv = dev->driver_data; | |
1545 | ||
2a2cf6b1 | 1546 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1547 | priv->conn->prof.maxmulti = 0; |
1548 | return count; | |
1549 | } | |
1550 | ||
1551 | static DEVICE_ATTR(max_tx_buffer_used, 0644, maxmulti_show, maxmulti_write); | |
1552 | ||
eebce385 MS |
1553 | static ssize_t maxcq_show (struct device *dev, struct device_attribute *attr, |
1554 | char *buf) | |
1da177e4 LT |
1555 | { |
1556 | struct netiucv_priv *priv = dev->driver_data; | |
1557 | ||
2a2cf6b1 | 1558 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1559 | return sprintf(buf, "%ld\n", priv->conn->prof.maxcqueue); |
1560 | } | |
1561 | ||
eebce385 MS |
1562 | static ssize_t maxcq_write (struct device *dev, struct device_attribute *attr, |
1563 | const char *buf, size_t count) | |
1da177e4 LT |
1564 | { |
1565 | struct netiucv_priv *priv = dev->driver_data; | |
e82b0f2c | 1566 | |
2a2cf6b1 | 1567 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1568 | priv->conn->prof.maxcqueue = 0; |
1569 | return count; | |
1570 | } | |
1571 | ||
1572 | static DEVICE_ATTR(max_chained_skbs, 0644, maxcq_show, maxcq_write); | |
1573 | ||
eebce385 MS |
1574 | static ssize_t sdoio_show (struct device *dev, struct device_attribute *attr, |
1575 | char *buf) | |
1da177e4 LT |
1576 | { |
1577 | struct netiucv_priv *priv = dev->driver_data; | |
1578 | ||
2a2cf6b1 | 1579 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1580 | return sprintf(buf, "%ld\n", priv->conn->prof.doios_single); |
1581 | } | |
1582 | ||
eebce385 MS |
1583 | static ssize_t sdoio_write (struct device *dev, struct device_attribute *attr, |
1584 | const char *buf, size_t count) | |
1da177e4 LT |
1585 | { |
1586 | struct netiucv_priv *priv = dev->driver_data; | |
e82b0f2c | 1587 | |
2a2cf6b1 | 1588 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1589 | priv->conn->prof.doios_single = 0; |
1590 | return count; | |
1591 | } | |
1592 | ||
1593 | static DEVICE_ATTR(tx_single_write_ops, 0644, sdoio_show, sdoio_write); | |
1594 | ||
eebce385 MS |
1595 | static ssize_t mdoio_show (struct device *dev, struct device_attribute *attr, |
1596 | char *buf) | |
1da177e4 LT |
1597 | { |
1598 | struct netiucv_priv *priv = dev->driver_data; | |
1599 | ||
2a2cf6b1 | 1600 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1601 | return sprintf(buf, "%ld\n", priv->conn->prof.doios_multi); |
1602 | } | |
1603 | ||
eebce385 MS |
1604 | static ssize_t mdoio_write (struct device *dev, struct device_attribute *attr, |
1605 | const char *buf, size_t count) | |
1da177e4 LT |
1606 | { |
1607 | struct netiucv_priv *priv = dev->driver_data; | |
e82b0f2c | 1608 | |
2a2cf6b1 | 1609 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1610 | priv->conn->prof.doios_multi = 0; |
1611 | return count; | |
1612 | } | |
1613 | ||
1614 | static DEVICE_ATTR(tx_multi_write_ops, 0644, mdoio_show, mdoio_write); | |
1615 | ||
eebce385 MS |
1616 | static ssize_t txlen_show (struct device *dev, struct device_attribute *attr, |
1617 | char *buf) | |
1da177e4 LT |
1618 | { |
1619 | struct netiucv_priv *priv = dev->driver_data; | |
1620 | ||
2a2cf6b1 | 1621 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1622 | return sprintf(buf, "%ld\n", priv->conn->prof.txlen); |
1623 | } | |
1624 | ||
eebce385 MS |
1625 | static ssize_t txlen_write (struct device *dev, struct device_attribute *attr, |
1626 | const char *buf, size_t count) | |
1da177e4 LT |
1627 | { |
1628 | struct netiucv_priv *priv = dev->driver_data; | |
e82b0f2c | 1629 | |
2a2cf6b1 | 1630 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1631 | priv->conn->prof.txlen = 0; |
1632 | return count; | |
1633 | } | |
1634 | ||
1635 | static DEVICE_ATTR(netto_bytes, 0644, txlen_show, txlen_write); | |
1636 | ||
eebce385 MS |
1637 | static ssize_t txtime_show (struct device *dev, struct device_attribute *attr, |
1638 | char *buf) | |
1da177e4 LT |
1639 | { |
1640 | struct netiucv_priv *priv = dev->driver_data; | |
1641 | ||
2a2cf6b1 | 1642 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1643 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_time); |
1644 | } | |
1645 | ||
eebce385 MS |
1646 | static ssize_t txtime_write (struct device *dev, struct device_attribute *attr, |
1647 | const char *buf, size_t count) | |
1da177e4 LT |
1648 | { |
1649 | struct netiucv_priv *priv = dev->driver_data; | |
e82b0f2c | 1650 | |
2a2cf6b1 | 1651 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1652 | priv->conn->prof.tx_time = 0; |
1653 | return count; | |
1654 | } | |
1655 | ||
1656 | static DEVICE_ATTR(max_tx_io_time, 0644, txtime_show, txtime_write); | |
1657 | ||
eebce385 MS |
1658 | static ssize_t txpend_show (struct device *dev, struct device_attribute *attr, |
1659 | char *buf) | |
1da177e4 LT |
1660 | { |
1661 | struct netiucv_priv *priv = dev->driver_data; | |
1662 | ||
2a2cf6b1 | 1663 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1664 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_pending); |
1665 | } | |
1666 | ||
eebce385 MS |
1667 | static ssize_t txpend_write (struct device *dev, struct device_attribute *attr, |
1668 | const char *buf, size_t count) | |
1da177e4 LT |
1669 | { |
1670 | struct netiucv_priv *priv = dev->driver_data; | |
1671 | ||
2a2cf6b1 | 1672 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1673 | priv->conn->prof.tx_pending = 0; |
1674 | return count; | |
1675 | } | |
1676 | ||
1677 | static DEVICE_ATTR(tx_pending, 0644, txpend_show, txpend_write); | |
1678 | ||
eebce385 MS |
1679 | static ssize_t txmpnd_show (struct device *dev, struct device_attribute *attr, |
1680 | char *buf) | |
1da177e4 LT |
1681 | { |
1682 | struct netiucv_priv *priv = dev->driver_data; | |
1683 | ||
2a2cf6b1 | 1684 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1685 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_max_pending); |
1686 | } | |
1687 | ||
eebce385 MS |
1688 | static ssize_t txmpnd_write (struct device *dev, struct device_attribute *attr, |
1689 | const char *buf, size_t count) | |
1da177e4 LT |
1690 | { |
1691 | struct netiucv_priv *priv = dev->driver_data; | |
1692 | ||
2a2cf6b1 | 1693 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1694 | priv->conn->prof.tx_max_pending = 0; |
1695 | return count; | |
1696 | } | |
1697 | ||
1698 | static DEVICE_ATTR(tx_max_pending, 0644, txmpnd_show, txmpnd_write); | |
1699 | ||
1700 | static struct attribute *netiucv_attrs[] = { | |
1701 | &dev_attr_buffer.attr, | |
1702 | &dev_attr_user.attr, | |
1703 | NULL, | |
1704 | }; | |
1705 | ||
1706 | static struct attribute_group netiucv_attr_group = { | |
1707 | .attrs = netiucv_attrs, | |
1708 | }; | |
1709 | ||
1710 | static struct attribute *netiucv_stat_attrs[] = { | |
1711 | &dev_attr_device_fsm_state.attr, | |
1712 | &dev_attr_connection_fsm_state.attr, | |
1713 | &dev_attr_max_tx_buffer_used.attr, | |
1714 | &dev_attr_max_chained_skbs.attr, | |
1715 | &dev_attr_tx_single_write_ops.attr, | |
1716 | &dev_attr_tx_multi_write_ops.attr, | |
1717 | &dev_attr_netto_bytes.attr, | |
1718 | &dev_attr_max_tx_io_time.attr, | |
1719 | &dev_attr_tx_pending.attr, | |
1720 | &dev_attr_tx_max_pending.attr, | |
1721 | NULL, | |
1722 | }; | |
1723 | ||
1724 | static struct attribute_group netiucv_stat_attr_group = { | |
1725 | .name = "stats", | |
1726 | .attrs = netiucv_stat_attrs, | |
1727 | }; | |
1728 | ||
d4614627 | 1729 | static int netiucv_add_files(struct device *dev) |
1da177e4 LT |
1730 | { |
1731 | int ret; | |
1732 | ||
2a2cf6b1 | 1733 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1734 | ret = sysfs_create_group(&dev->kobj, &netiucv_attr_group); |
1735 | if (ret) | |
1736 | return ret; | |
1737 | ret = sysfs_create_group(&dev->kobj, &netiucv_stat_attr_group); | |
1738 | if (ret) | |
1739 | sysfs_remove_group(&dev->kobj, &netiucv_attr_group); | |
1740 | return ret; | |
1741 | } | |
1742 | ||
d4614627 | 1743 | static void netiucv_remove_files(struct device *dev) |
1da177e4 | 1744 | { |
2a2cf6b1 | 1745 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1746 | sysfs_remove_group(&dev->kobj, &netiucv_stat_attr_group); |
1747 | sysfs_remove_group(&dev->kobj, &netiucv_attr_group); | |
1748 | } | |
1749 | ||
eebce385 | 1750 | static int netiucv_register_device(struct net_device *ndev) |
1da177e4 | 1751 | { |
eebce385 | 1752 | struct netiucv_priv *priv = netdev_priv(ndev); |
88abaab4 | 1753 | struct device *dev = kzalloc(sizeof(struct device), GFP_KERNEL); |
1da177e4 LT |
1754 | int ret; |
1755 | ||
1756 | ||
2a2cf6b1 | 1757 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1758 | |
1759 | if (dev) { | |
1da177e4 LT |
1760 | snprintf(dev->bus_id, BUS_ID_SIZE, "net%s", ndev->name); |
1761 | dev->bus = &iucv_bus; | |
1762 | dev->parent = iucv_root; | |
1763 | /* | |
1764 | * The release function could be called after the | |
1765 | * module has been unloaded. It's _only_ task is to | |
1766 | * free the struct. Therefore, we specify kfree() | |
1767 | * directly here. (Probably a little bit obfuscating | |
1768 | * but legitime ...). | |
1769 | */ | |
1770 | dev->release = (void (*)(struct device *))kfree; | |
1771 | dev->driver = &netiucv_driver; | |
1772 | } else | |
1773 | return -ENOMEM; | |
1774 | ||
1775 | ret = device_register(dev); | |
1776 | ||
1777 | if (ret) | |
1778 | return ret; | |
1779 | ret = netiucv_add_files(dev); | |
1780 | if (ret) | |
1781 | goto out_unreg; | |
1782 | priv->dev = dev; | |
1783 | dev->driver_data = priv; | |
1784 | return 0; | |
1785 | ||
1786 | out_unreg: | |
1787 | device_unregister(dev); | |
1788 | return ret; | |
1789 | } | |
1790 | ||
eebce385 | 1791 | static void netiucv_unregister_device(struct device *dev) |
1da177e4 | 1792 | { |
2a2cf6b1 | 1793 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1794 | netiucv_remove_files(dev); |
1795 | device_unregister(dev); | |
1796 | } | |
1797 | ||
1798 | /** | |
1799 | * Allocate and initialize a new connection structure. | |
1800 | * Add it to the list of netiucv connections; | |
1801 | */ | |
eebce385 MS |
1802 | static struct iucv_connection *netiucv_new_connection(struct net_device *dev, |
1803 | char *username) | |
1804 | { | |
1805 | struct iucv_connection *conn; | |
1da177e4 | 1806 | |
eebce385 MS |
1807 | conn = kzalloc(sizeof(*conn), GFP_KERNEL); |
1808 | if (!conn) | |
1809 | goto out; | |
1810 | skb_queue_head_init(&conn->collect_queue); | |
1811 | skb_queue_head_init(&conn->commit_queue); | |
1812 | spin_lock_init(&conn->collect_lock); | |
1813 | conn->max_buffsize = NETIUCV_BUFSIZE_DEFAULT; | |
1814 | conn->netdev = dev; | |
1815 | ||
1816 | conn->rx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA); | |
1817 | if (!conn->rx_buff) | |
1818 | goto out_conn; | |
1819 | conn->tx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA); | |
1820 | if (!conn->tx_buff) | |
1821 | goto out_rx; | |
1822 | conn->fsm = init_fsm("netiucvconn", conn_state_names, | |
1823 | conn_event_names, NR_CONN_STATES, | |
1824 | NR_CONN_EVENTS, conn_fsm, CONN_FSM_LEN, | |
1825 | GFP_KERNEL); | |
1826 | if (!conn->fsm) | |
1827 | goto out_tx; | |
1828 | ||
1829 | fsm_settimer(conn->fsm, &conn->timer); | |
1830 | fsm_newstate(conn->fsm, CONN_STATE_INVALID); | |
1831 | ||
1832 | if (username) { | |
1833 | memcpy(conn->userid, username, 9); | |
1834 | fsm_newstate(conn->fsm, CONN_STATE_STOPPED); | |
1da177e4 | 1835 | } |
eebce385 MS |
1836 | |
1837 | write_lock_bh(&iucv_connection_rwlock); | |
1838 | list_add_tail(&conn->list, &iucv_connection_list); | |
1839 | write_unlock_bh(&iucv_connection_rwlock); | |
1da177e4 | 1840 | return conn; |
eebce385 MS |
1841 | |
1842 | out_tx: | |
1843 | kfree_skb(conn->tx_buff); | |
1844 | out_rx: | |
1845 | kfree_skb(conn->rx_buff); | |
1846 | out_conn: | |
1847 | kfree(conn); | |
1848 | out: | |
1849 | return NULL; | |
1da177e4 LT |
1850 | } |
1851 | ||
1852 | /** | |
1853 | * Release a connection structure and remove it from the | |
1854 | * list of netiucv connections. | |
1855 | */ | |
eebce385 | 1856 | static void netiucv_remove_connection(struct iucv_connection *conn) |
1da177e4 | 1857 | { |
2a2cf6b1 | 1858 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 MS |
1859 | write_lock_bh(&iucv_connection_rwlock); |
1860 | list_del_init(&conn->list); | |
1861 | write_unlock_bh(&iucv_connection_rwlock); | |
0be4acec UB |
1862 | fsm_deltimer(&conn->timer); |
1863 | netiucv_purge_skb_queue(&conn->collect_queue); | |
eebce385 MS |
1864 | if (conn->path) { |
1865 | iucv_path_sever(conn->path, iucvMagic); | |
1866 | kfree(conn->path); | |
1867 | conn->path = NULL; | |
1da177e4 | 1868 | } |
0be4acec | 1869 | netiucv_purge_skb_queue(&conn->commit_queue); |
eebce385 MS |
1870 | kfree_fsm(conn->fsm); |
1871 | kfree_skb(conn->rx_buff); | |
1872 | kfree_skb(conn->tx_buff); | |
1da177e4 LT |
1873 | } |
1874 | ||
1875 | /** | |
1876 | * Release everything of a net device. | |
1877 | */ | |
eebce385 | 1878 | static void netiucv_free_netdevice(struct net_device *dev) |
1da177e4 | 1879 | { |
eebce385 | 1880 | struct netiucv_priv *privptr = netdev_priv(dev); |
1da177e4 | 1881 | |
2a2cf6b1 | 1882 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1883 | |
1884 | if (!dev) | |
1885 | return; | |
1886 | ||
1da177e4 LT |
1887 | if (privptr) { |
1888 | if (privptr->conn) | |
1889 | netiucv_remove_connection(privptr->conn); | |
1890 | if (privptr->fsm) | |
1891 | kfree_fsm(privptr->fsm); | |
1892 | privptr->conn = NULL; privptr->fsm = NULL; | |
1893 | /* privptr gets freed by free_netdev() */ | |
1894 | } | |
1895 | free_netdev(dev); | |
1896 | } | |
1897 | ||
1898 | /** | |
1899 | * Initialize a net device. (Called from kernel in alloc_netdev()) | |
1900 | */ | |
eebce385 | 1901 | static void netiucv_setup_netdevice(struct net_device *dev) |
1da177e4 | 1902 | { |
1da177e4 LT |
1903 | dev->mtu = NETIUCV_MTU_DEFAULT; |
1904 | dev->hard_start_xmit = netiucv_tx; | |
1905 | dev->open = netiucv_open; | |
1906 | dev->stop = netiucv_close; | |
1907 | dev->get_stats = netiucv_stats; | |
1908 | dev->change_mtu = netiucv_change_mtu; | |
1909 | dev->destructor = netiucv_free_netdevice; | |
1910 | dev->hard_header_len = NETIUCV_HDRLEN; | |
1911 | dev->addr_len = 0; | |
1912 | dev->type = ARPHRD_SLIP; | |
1913 | dev->tx_queue_len = NETIUCV_QUEUELEN_DEFAULT; | |
1914 | dev->flags = IFF_POINTOPOINT | IFF_NOARP; | |
1da177e4 LT |
1915 | } |
1916 | ||
1917 | /** | |
1918 | * Allocate and initialize everything of a net device. | |
1919 | */ | |
eebce385 | 1920 | static struct net_device *netiucv_init_netdevice(char *username) |
1da177e4 LT |
1921 | { |
1922 | struct netiucv_priv *privptr; | |
1923 | struct net_device *dev; | |
1924 | ||
1925 | dev = alloc_netdev(sizeof(struct netiucv_priv), "iucv%d", | |
1926 | netiucv_setup_netdevice); | |
1927 | if (!dev) | |
1928 | return NULL; | |
eebce385 MS |
1929 | if (dev_alloc_name(dev, dev->name) < 0) |
1930 | goto out_netdev; | |
1da177e4 | 1931 | |
eebce385 | 1932 | privptr = netdev_priv(dev); |
1da177e4 LT |
1933 | privptr->fsm = init_fsm("netiucvdev", dev_state_names, |
1934 | dev_event_names, NR_DEV_STATES, NR_DEV_EVENTS, | |
1935 | dev_fsm, DEV_FSM_LEN, GFP_KERNEL); | |
eebce385 MS |
1936 | if (!privptr->fsm) |
1937 | goto out_netdev; | |
1938 | ||
1da177e4 LT |
1939 | privptr->conn = netiucv_new_connection(dev, username); |
1940 | if (!privptr->conn) { | |
1da177e4 | 1941 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_new_connection\n"); |
eebce385 | 1942 | goto out_fsm; |
1da177e4 LT |
1943 | } |
1944 | fsm_newstate(privptr->fsm, DEV_STATE_STOPPED); | |
1da177e4 | 1945 | return dev; |
eebce385 MS |
1946 | |
1947 | out_fsm: | |
1948 | kfree_fsm(privptr->fsm); | |
1949 | out_netdev: | |
1950 | free_netdev(dev); | |
1951 | return NULL; | |
1da177e4 LT |
1952 | } |
1953 | ||
eebce385 MS |
1954 | static ssize_t conn_write(struct device_driver *drv, |
1955 | const char *buf, size_t count) | |
1da177e4 | 1956 | { |
eebce385 | 1957 | const char *p; |
16a83b30 | 1958 | char username[9]; |
eebce385 | 1959 | int i, rc; |
1da177e4 | 1960 | struct net_device *dev; |
eebce385 MS |
1961 | struct netiucv_priv *priv; |
1962 | struct iucv_connection *cp; | |
1da177e4 | 1963 | |
2a2cf6b1 | 1964 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1965 | if (count>9) { |
1966 | PRINT_WARN("netiucv: username too long (%d)!\n", (int)count); | |
1967 | IUCV_DBF_TEXT(setup, 2, "conn_write: too long\n"); | |
1968 | return -EINVAL; | |
1969 | } | |
1970 | ||
eebce385 MS |
1971 | for (i = 0, p = buf; i < 8 && *p; i++, p++) { |
1972 | if (isalnum(*p) || *p == '$') { | |
1973 | username[i] = toupper(*p); | |
1974 | continue; | |
1975 | } | |
1976 | if (*p == '\n') | |
1da177e4 LT |
1977 | /* trailing lf, grr */ |
1978 | break; | |
eebce385 MS |
1979 | PRINT_WARN("netiucv: Invalid character in username!\n"); |
1980 | IUCV_DBF_TEXT_(setup, 2, | |
1981 | "conn_write: invalid character %c\n", *p); | |
1982 | return -EINVAL; | |
1da177e4 | 1983 | } |
eebce385 | 1984 | while (i < 8) |
1da177e4 | 1985 | username[i++] = ' '; |
16a83b30 FP |
1986 | username[8] = '\0'; |
1987 | ||
eebce385 MS |
1988 | read_lock_bh(&iucv_connection_rwlock); |
1989 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
1990 | if (!strncmp(username, cp->userid, 9)) { | |
1991 | read_unlock_bh(&iucv_connection_rwlock); | |
1992 | PRINT_WARN("netiucv: Connection to %s already " | |
1993 | "exists\n", username); | |
1994 | return -EEXIST; | |
1995 | } | |
16a83b30 | 1996 | } |
eebce385 MS |
1997 | read_unlock_bh(&iucv_connection_rwlock); |
1998 | ||
1da177e4 LT |
1999 | dev = netiucv_init_netdevice(username); |
2000 | if (!dev) { | |
eebce385 MS |
2001 | PRINT_WARN("netiucv: Could not allocate network device " |
2002 | "structure for user '%s'\n", | |
2003 | netiucv_printname(username)); | |
1da177e4 LT |
2004 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_init_netdevice\n"); |
2005 | return -ENODEV; | |
2006 | } | |
2007 | ||
eebce385 MS |
2008 | rc = netiucv_register_device(dev); |
2009 | if (rc) { | |
1da177e4 | 2010 | IUCV_DBF_TEXT_(setup, 2, |
eebce385 | 2011 | "ret %d from netiucv_register_device\n", rc); |
1da177e4 LT |
2012 | goto out_free_ndev; |
2013 | } | |
2014 | ||
2015 | /* sysfs magic */ | |
eebce385 MS |
2016 | priv = netdev_priv(dev); |
2017 | SET_NETDEV_DEV(dev, priv->dev); | |
1da177e4 | 2018 | |
eebce385 MS |
2019 | rc = register_netdev(dev); |
2020 | if (rc) | |
2021 | goto out_unreg; | |
1da177e4 LT |
2022 | |
2023 | PRINT_INFO("%s: '%s'\n", dev->name, netiucv_printname(username)); | |
e82b0f2c | 2024 | |
1da177e4 LT |
2025 | return count; |
2026 | ||
eebce385 MS |
2027 | out_unreg: |
2028 | netiucv_unregister_device(priv->dev); | |
1da177e4 LT |
2029 | out_free_ndev: |
2030 | PRINT_WARN("netiucv: Could not register '%s'\n", dev->name); | |
2031 | IUCV_DBF_TEXT(setup, 2, "conn_write: could not register\n"); | |
2032 | netiucv_free_netdevice(dev); | |
eebce385 | 2033 | return rc; |
1da177e4 LT |
2034 | } |
2035 | ||
2b67fc46 | 2036 | static DRIVER_ATTR(connection, 0200, NULL, conn_write); |
1da177e4 | 2037 | |
eebce385 MS |
2038 | static ssize_t remove_write (struct device_driver *drv, |
2039 | const char *buf, size_t count) | |
1da177e4 | 2040 | { |
eebce385 | 2041 | struct iucv_connection *cp; |
1da177e4 LT |
2042 | struct net_device *ndev; |
2043 | struct netiucv_priv *priv; | |
2044 | struct device *dev; | |
2045 | char name[IFNAMSIZ]; | |
eebce385 | 2046 | const char *p; |
1da177e4 LT |
2047 | int i; |
2048 | ||
2a2cf6b1 | 2049 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
2050 | |
2051 | if (count >= IFNAMSIZ) | |
16a83b30 | 2052 | count = IFNAMSIZ - 1;; |
1da177e4 | 2053 | |
eebce385 MS |
2054 | for (i = 0, p = buf; i < count && *p; i++, p++) { |
2055 | if (*p == '\n' || *p == ' ') | |
1da177e4 LT |
2056 | /* trailing lf, grr */ |
2057 | break; | |
eebce385 | 2058 | name[i] = *p; |
1da177e4 LT |
2059 | } |
2060 | name[i] = '\0'; | |
2061 | ||
eebce385 MS |
2062 | read_lock_bh(&iucv_connection_rwlock); |
2063 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
2064 | ndev = cp->netdev; | |
2065 | priv = netdev_priv(ndev); | |
1da177e4 | 2066 | dev = priv->dev; |
eebce385 MS |
2067 | if (strncmp(name, ndev->name, count)) |
2068 | continue; | |
2069 | read_unlock_bh(&iucv_connection_rwlock); | |
1da177e4 | 2070 | if (ndev->flags & (IFF_UP | IFF_RUNNING)) { |
eebce385 MS |
2071 | PRINT_WARN("netiucv: net device %s active with peer " |
2072 | "%s\n", ndev->name, priv->conn->userid); | |
1da177e4 | 2073 | PRINT_WARN("netiucv: %s cannot be removed\n", |
eebce385 | 2074 | ndev->name); |
1da177e4 LT |
2075 | IUCV_DBF_TEXT(data, 2, "remove_write: still active\n"); |
2076 | return -EBUSY; | |
2077 | } | |
2078 | unregister_netdev(ndev); | |
2079 | netiucv_unregister_device(dev); | |
2080 | return count; | |
2081 | } | |
eebce385 | 2082 | read_unlock_bh(&iucv_connection_rwlock); |
1da177e4 LT |
2083 | PRINT_WARN("netiucv: net device %s unknown\n", name); |
2084 | IUCV_DBF_TEXT(data, 2, "remove_write: unknown device\n"); | |
2085 | return -EINVAL; | |
2086 | } | |
2087 | ||
2b67fc46 | 2088 | static DRIVER_ATTR(remove, 0200, NULL, remove_write); |
1da177e4 | 2089 | |
eebce385 MS |
2090 | static struct attribute * netiucv_drv_attrs[] = { |
2091 | &driver_attr_connection.attr, | |
2092 | &driver_attr_remove.attr, | |
2093 | NULL, | |
2094 | }; | |
2095 | ||
2096 | static struct attribute_group netiucv_drv_attr_group = { | |
2097 | .attrs = netiucv_drv_attrs, | |
2098 | }; | |
2099 | ||
5b88feb1 CH |
2100 | static struct attribute_group *netiucv_drv_attr_groups[] = { |
2101 | &netiucv_drv_attr_group, | |
2102 | NULL, | |
2103 | }; | |
2104 | ||
eebce385 | 2105 | static void netiucv_banner(void) |
1da177e4 | 2106 | { |
e018ba1f | 2107 | PRINT_INFO("NETIUCV driver initialized\n"); |
1da177e4 LT |
2108 | } |
2109 | ||
eebce385 | 2110 | static void __exit netiucv_exit(void) |
1da177e4 | 2111 | { |
eebce385 MS |
2112 | struct iucv_connection *cp; |
2113 | struct net_device *ndev; | |
2114 | struct netiucv_priv *priv; | |
2115 | struct device *dev; | |
2116 | ||
2a2cf6b1 | 2117 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 MS |
2118 | while (!list_empty(&iucv_connection_list)) { |
2119 | cp = list_entry(iucv_connection_list.next, | |
2120 | struct iucv_connection, list); | |
eebce385 MS |
2121 | ndev = cp->netdev; |
2122 | priv = netdev_priv(ndev); | |
2123 | dev = priv->dev; | |
1da177e4 LT |
2124 | |
2125 | unregister_netdev(ndev); | |
2126 | netiucv_unregister_device(dev); | |
2127 | } | |
2128 | ||
1da177e4 | 2129 | driver_unregister(&netiucv_driver); |
eebce385 | 2130 | iucv_unregister(&netiucv_handler, 1); |
1da177e4 LT |
2131 | iucv_unregister_dbf_views(); |
2132 | ||
2133 | PRINT_INFO("NETIUCV driver unloaded\n"); | |
2134 | return; | |
2135 | } | |
2136 | ||
eebce385 | 2137 | static int __init netiucv_init(void) |
1da177e4 | 2138 | { |
eebce385 | 2139 | int rc; |
e82b0f2c | 2140 | |
eebce385 MS |
2141 | rc = iucv_register_dbf_views(); |
2142 | if (rc) | |
2143 | goto out; | |
2144 | rc = iucv_register(&netiucv_handler, 1); | |
2145 | if (rc) | |
2146 | goto out_dbf; | |
2a2cf6b1 | 2147 | IUCV_DBF_TEXT(trace, 3, __func__); |
0a0a8310 | 2148 | netiucv_driver.groups = netiucv_drv_attr_groups; |
eebce385 MS |
2149 | rc = driver_register(&netiucv_driver); |
2150 | if (rc) { | |
1da177e4 | 2151 | PRINT_ERR("NETIUCV: failed to register driver.\n"); |
eebce385 MS |
2152 | IUCV_DBF_TEXT_(setup, 2, "ret %d from driver_register\n", rc); |
2153 | goto out_iucv; | |
1da177e4 LT |
2154 | } |
2155 | ||
eebce385 MS |
2156 | netiucv_banner(); |
2157 | return rc; | |
2158 | ||
eebce385 MS |
2159 | out_iucv: |
2160 | iucv_unregister(&netiucv_handler, 1); | |
2161 | out_dbf: | |
2162 | iucv_unregister_dbf_views(); | |
2163 | out: | |
2164 | return rc; | |
1da177e4 | 2165 | } |
e82b0f2c | 2166 | |
1da177e4 LT |
2167 | module_init(netiucv_init); |
2168 | module_exit(netiucv_exit); | |
2169 | MODULE_LICENSE("GPL"); |