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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 | ||
137 | static inline void iucv_hex_dump(unsigned char *buf, size_t len) | |
138 | { | |
139 | size_t i; | |
140 | ||
141 | for (i = 0; i < len; i++) { | |
142 | if (i && !(i % 16)) | |
143 | printk("\n"); | |
144 | printk("%02x ", *(buf + i)); | |
145 | } | |
146 | printk("\n"); | |
147 | } | |
e82b0f2c | 148 | |
1da177e4 LT |
149 | #define PRINTK_HEADER " iucv: " /* for debugging */ |
150 | ||
151 | static struct device_driver netiucv_driver = { | |
152 | .name = "netiucv", | |
153 | .bus = &iucv_bus, | |
154 | }; | |
155 | ||
eebce385 MS |
156 | static int netiucv_callback_connreq(struct iucv_path *, |
157 | u8 ipvmid[8], u8 ipuser[16]); | |
158 | static void netiucv_callback_connack(struct iucv_path *, u8 ipuser[16]); | |
159 | static void netiucv_callback_connrej(struct iucv_path *, u8 ipuser[16]); | |
160 | static void netiucv_callback_connsusp(struct iucv_path *, u8 ipuser[16]); | |
161 | static void netiucv_callback_connres(struct iucv_path *, u8 ipuser[16]); | |
162 | static void netiucv_callback_rx(struct iucv_path *, struct iucv_message *); | |
163 | static void netiucv_callback_txdone(struct iucv_path *, struct iucv_message *); | |
164 | ||
165 | static struct iucv_handler netiucv_handler = { | |
166 | .path_pending = netiucv_callback_connreq, | |
167 | .path_complete = netiucv_callback_connack, | |
168 | .path_severed = netiucv_callback_connrej, | |
169 | .path_quiesced = netiucv_callback_connsusp, | |
170 | .path_resumed = netiucv_callback_connres, | |
171 | .message_pending = netiucv_callback_rx, | |
172 | .message_complete = netiucv_callback_txdone | |
173 | }; | |
174 | ||
1da177e4 LT |
175 | /** |
176 | * Per connection profiling data | |
177 | */ | |
178 | struct connection_profile { | |
179 | unsigned long maxmulti; | |
180 | unsigned long maxcqueue; | |
181 | unsigned long doios_single; | |
182 | unsigned long doios_multi; | |
183 | unsigned long txlen; | |
184 | unsigned long tx_time; | |
185 | struct timespec send_stamp; | |
186 | unsigned long tx_pending; | |
187 | unsigned long tx_max_pending; | |
188 | }; | |
189 | ||
190 | /** | |
191 | * Representation of one iucv connection | |
192 | */ | |
193 | struct iucv_connection { | |
eebce385 MS |
194 | struct list_head list; |
195 | struct iucv_path *path; | |
1da177e4 LT |
196 | struct sk_buff *rx_buff; |
197 | struct sk_buff *tx_buff; | |
198 | struct sk_buff_head collect_queue; | |
199 | struct sk_buff_head commit_queue; | |
200 | spinlock_t collect_lock; | |
201 | int collect_len; | |
202 | int max_buffsize; | |
203 | fsm_timer timer; | |
204 | fsm_instance *fsm; | |
205 | struct net_device *netdev; | |
206 | struct connection_profile prof; | |
207 | char userid[9]; | |
208 | }; | |
209 | ||
210 | /** | |
211 | * Linked list of all connection structs. | |
212 | */ | |
eebce385 MS |
213 | static struct list_head iucv_connection_list = |
214 | LIST_HEAD_INIT(iucv_connection_list); | |
215 | static rwlock_t iucv_connection_rwlock = RW_LOCK_UNLOCKED; | |
1da177e4 LT |
216 | |
217 | /** | |
218 | * Representation of event-data for the | |
219 | * connection state machine. | |
220 | */ | |
221 | struct iucv_event { | |
222 | struct iucv_connection *conn; | |
223 | void *data; | |
224 | }; | |
225 | ||
226 | /** | |
227 | * Private part of the network device structure | |
228 | */ | |
229 | struct netiucv_priv { | |
230 | struct net_device_stats stats; | |
231 | unsigned long tbusy; | |
232 | fsm_instance *fsm; | |
233 | struct iucv_connection *conn; | |
234 | struct device *dev; | |
235 | }; | |
236 | ||
237 | /** | |
238 | * Link level header for a packet. | |
239 | */ | |
eebce385 MS |
240 | struct ll_header { |
241 | u16 next; | |
242 | }; | |
1da177e4 | 243 | |
eebce385 | 244 | #define NETIUCV_HDRLEN (sizeof(struct ll_header)) |
1da177e4 LT |
245 | #define NETIUCV_BUFSIZE_MAX 32768 |
246 | #define NETIUCV_BUFSIZE_DEFAULT NETIUCV_BUFSIZE_MAX | |
247 | #define NETIUCV_MTU_MAX (NETIUCV_BUFSIZE_MAX - NETIUCV_HDRLEN) | |
248 | #define NETIUCV_MTU_DEFAULT 9216 | |
249 | #define NETIUCV_QUEUELEN_DEFAULT 50 | |
250 | #define NETIUCV_TIMEOUT_5SEC 5000 | |
251 | ||
252 | /** | |
253 | * Compatibility macros for busy handling | |
254 | * of network devices. | |
255 | */ | |
eebce385 | 256 | static inline void netiucv_clear_busy(struct net_device *dev) |
1da177e4 | 257 | { |
eebce385 MS |
258 | struct netiucv_priv *priv = netdev_priv(dev); |
259 | clear_bit(0, &priv->tbusy); | |
1da177e4 LT |
260 | netif_wake_queue(dev); |
261 | } | |
262 | ||
eebce385 | 263 | static inline int netiucv_test_and_set_busy(struct net_device *dev) |
1da177e4 | 264 | { |
eebce385 | 265 | struct netiucv_priv *priv = netdev_priv(dev); |
1da177e4 | 266 | netif_stop_queue(dev); |
eebce385 | 267 | return test_and_set_bit(0, &priv->tbusy); |
1da177e4 LT |
268 | } |
269 | ||
eebce385 | 270 | static u8 iucvMagic[16] = { |
1da177e4 LT |
271 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, |
272 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40 | |
273 | }; | |
274 | ||
1da177e4 LT |
275 | /** |
276 | * Convert an iucv userId to its printable | |
277 | * form (strip whitespace at end). | |
278 | * | |
279 | * @param An iucv userId | |
280 | * | |
281 | * @returns The printable string (static data!!) | |
282 | */ | |
eebce385 | 283 | static inline char *netiucv_printname(char *name) |
1da177e4 LT |
284 | { |
285 | static char tmp[9]; | |
286 | char *p = tmp; | |
287 | memcpy(tmp, name, 8); | |
288 | tmp[8] = '\0'; | |
289 | while (*p && (!isspace(*p))) | |
290 | p++; | |
291 | *p = '\0'; | |
292 | return tmp; | |
293 | } | |
e82b0f2c | 294 | |
1da177e4 LT |
295 | /** |
296 | * States of the interface statemachine. | |
297 | */ | |
298 | enum dev_states { | |
299 | DEV_STATE_STOPPED, | |
300 | DEV_STATE_STARTWAIT, | |
301 | DEV_STATE_STOPWAIT, | |
302 | DEV_STATE_RUNNING, | |
303 | /** | |
304 | * MUST be always the last element!! | |
305 | */ | |
306 | NR_DEV_STATES | |
307 | }; | |
308 | ||
309 | static const char *dev_state_names[] = { | |
310 | "Stopped", | |
311 | "StartWait", | |
312 | "StopWait", | |
313 | "Running", | |
314 | }; | |
315 | ||
316 | /** | |
317 | * Events of the interface statemachine. | |
318 | */ | |
319 | enum dev_events { | |
320 | DEV_EVENT_START, | |
321 | DEV_EVENT_STOP, | |
322 | DEV_EVENT_CONUP, | |
323 | DEV_EVENT_CONDOWN, | |
324 | /** | |
325 | * MUST be always the last element!! | |
326 | */ | |
327 | NR_DEV_EVENTS | |
328 | }; | |
329 | ||
330 | static const char *dev_event_names[] = { | |
331 | "Start", | |
332 | "Stop", | |
333 | "Connection up", | |
334 | "Connection down", | |
335 | }; | |
e82b0f2c | 336 | |
1da177e4 LT |
337 | /** |
338 | * Events of the connection statemachine | |
339 | */ | |
340 | enum conn_events { | |
341 | /** | |
342 | * Events, representing callbacks from | |
343 | * lowlevel iucv layer) | |
344 | */ | |
345 | CONN_EVENT_CONN_REQ, | |
346 | CONN_EVENT_CONN_ACK, | |
347 | CONN_EVENT_CONN_REJ, | |
348 | CONN_EVENT_CONN_SUS, | |
349 | CONN_EVENT_CONN_RES, | |
350 | CONN_EVENT_RX, | |
351 | CONN_EVENT_TXDONE, | |
352 | ||
353 | /** | |
354 | * Events, representing errors return codes from | |
355 | * calls to lowlevel iucv layer | |
356 | */ | |
357 | ||
358 | /** | |
359 | * Event, representing timer expiry. | |
360 | */ | |
361 | CONN_EVENT_TIMER, | |
362 | ||
363 | /** | |
364 | * Events, representing commands from upper levels. | |
365 | */ | |
366 | CONN_EVENT_START, | |
367 | CONN_EVENT_STOP, | |
368 | ||
369 | /** | |
370 | * MUST be always the last element!! | |
371 | */ | |
372 | NR_CONN_EVENTS, | |
373 | }; | |
374 | ||
375 | static const char *conn_event_names[] = { | |
376 | "Remote connection request", | |
377 | "Remote connection acknowledge", | |
378 | "Remote connection reject", | |
379 | "Connection suspended", | |
380 | "Connection resumed", | |
381 | "Data received", | |
382 | "Data sent", | |
383 | ||
384 | "Timer", | |
385 | ||
386 | "Start", | |
387 | "Stop", | |
388 | }; | |
389 | ||
390 | /** | |
391 | * States of the connection statemachine. | |
392 | */ | |
393 | enum conn_states { | |
394 | /** | |
395 | * Connection not assigned to any device, | |
396 | * initial state, invalid | |
397 | */ | |
398 | CONN_STATE_INVALID, | |
399 | ||
400 | /** | |
401 | * Userid assigned but not operating | |
402 | */ | |
403 | CONN_STATE_STOPPED, | |
404 | ||
405 | /** | |
406 | * Connection registered, | |
407 | * no connection request sent yet, | |
408 | * no connection request received | |
409 | */ | |
410 | CONN_STATE_STARTWAIT, | |
411 | ||
412 | /** | |
413 | * Connection registered and connection request sent, | |
414 | * no acknowledge and no connection request received yet. | |
415 | */ | |
416 | CONN_STATE_SETUPWAIT, | |
417 | ||
418 | /** | |
419 | * Connection up and running idle | |
420 | */ | |
421 | CONN_STATE_IDLE, | |
422 | ||
423 | /** | |
424 | * Data sent, awaiting CONN_EVENT_TXDONE | |
425 | */ | |
426 | CONN_STATE_TX, | |
427 | ||
428 | /** | |
429 | * Error during registration. | |
430 | */ | |
431 | CONN_STATE_REGERR, | |
432 | ||
433 | /** | |
434 | * Error during registration. | |
435 | */ | |
436 | CONN_STATE_CONNERR, | |
437 | ||
438 | /** | |
439 | * MUST be always the last element!! | |
440 | */ | |
441 | NR_CONN_STATES, | |
442 | }; | |
443 | ||
444 | static const char *conn_state_names[] = { | |
445 | "Invalid", | |
446 | "Stopped", | |
447 | "StartWait", | |
448 | "SetupWait", | |
449 | "Idle", | |
450 | "TX", | |
451 | "Terminating", | |
452 | "Registration error", | |
453 | "Connect error", | |
454 | }; | |
455 | ||
e82b0f2c | 456 | |
1da177e4 LT |
457 | /** |
458 | * Debug Facility Stuff | |
459 | */ | |
460 | static debug_info_t *iucv_dbf_setup = NULL; | |
461 | static debug_info_t *iucv_dbf_data = NULL; | |
462 | static debug_info_t *iucv_dbf_trace = NULL; | |
463 | ||
464 | DEFINE_PER_CPU(char[256], iucv_dbf_txt_buf); | |
465 | ||
eebce385 | 466 | static void iucv_unregister_dbf_views(void) |
1da177e4 LT |
467 | { |
468 | if (iucv_dbf_setup) | |
469 | debug_unregister(iucv_dbf_setup); | |
470 | if (iucv_dbf_data) | |
471 | debug_unregister(iucv_dbf_data); | |
472 | if (iucv_dbf_trace) | |
473 | debug_unregister(iucv_dbf_trace); | |
474 | } | |
eebce385 | 475 | static int iucv_register_dbf_views(void) |
1da177e4 LT |
476 | { |
477 | iucv_dbf_setup = debug_register(IUCV_DBF_SETUP_NAME, | |
66a464db | 478 | IUCV_DBF_SETUP_PAGES, |
1da177e4 LT |
479 | IUCV_DBF_SETUP_NR_AREAS, |
480 | IUCV_DBF_SETUP_LEN); | |
481 | iucv_dbf_data = debug_register(IUCV_DBF_DATA_NAME, | |
66a464db | 482 | IUCV_DBF_DATA_PAGES, |
1da177e4 LT |
483 | IUCV_DBF_DATA_NR_AREAS, |
484 | IUCV_DBF_DATA_LEN); | |
485 | iucv_dbf_trace = debug_register(IUCV_DBF_TRACE_NAME, | |
66a464db | 486 | IUCV_DBF_TRACE_PAGES, |
1da177e4 LT |
487 | IUCV_DBF_TRACE_NR_AREAS, |
488 | IUCV_DBF_TRACE_LEN); | |
489 | ||
490 | if ((iucv_dbf_setup == NULL) || (iucv_dbf_data == NULL) || | |
491 | (iucv_dbf_trace == NULL)) { | |
492 | iucv_unregister_dbf_views(); | |
493 | return -ENOMEM; | |
494 | } | |
495 | debug_register_view(iucv_dbf_setup, &debug_hex_ascii_view); | |
496 | debug_set_level(iucv_dbf_setup, IUCV_DBF_SETUP_LEVEL); | |
497 | ||
498 | debug_register_view(iucv_dbf_data, &debug_hex_ascii_view); | |
499 | debug_set_level(iucv_dbf_data, IUCV_DBF_DATA_LEVEL); | |
500 | ||
501 | debug_register_view(iucv_dbf_trace, &debug_hex_ascii_view); | |
502 | debug_set_level(iucv_dbf_trace, IUCV_DBF_TRACE_LEVEL); | |
503 | ||
504 | return 0; | |
505 | } | |
506 | ||
eebce385 | 507 | /* |
1da177e4 | 508 | * Callback-wrappers, called from lowlevel iucv layer. |
eebce385 | 509 | */ |
1da177e4 | 510 | |
eebce385 MS |
511 | static void netiucv_callback_rx(struct iucv_path *path, |
512 | struct iucv_message *msg) | |
1da177e4 | 513 | { |
eebce385 | 514 | struct iucv_connection *conn = path->private; |
1da177e4 LT |
515 | struct iucv_event ev; |
516 | ||
517 | ev.conn = conn; | |
eebce385 | 518 | ev.data = msg; |
1da177e4 LT |
519 | fsm_event(conn->fsm, CONN_EVENT_RX, &ev); |
520 | } | |
521 | ||
eebce385 MS |
522 | static void netiucv_callback_txdone(struct iucv_path *path, |
523 | struct iucv_message *msg) | |
1da177e4 | 524 | { |
eebce385 | 525 | struct iucv_connection *conn = path->private; |
1da177e4 LT |
526 | struct iucv_event ev; |
527 | ||
528 | ev.conn = conn; | |
eebce385 | 529 | ev.data = msg; |
1da177e4 LT |
530 | fsm_event(conn->fsm, CONN_EVENT_TXDONE, &ev); |
531 | } | |
532 | ||
eebce385 | 533 | static void netiucv_callback_connack(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 534 | { |
eebce385 | 535 | struct iucv_connection *conn = path->private; |
1da177e4 | 536 | |
eebce385 | 537 | fsm_event(conn->fsm, CONN_EVENT_CONN_ACK, conn); |
1da177e4 LT |
538 | } |
539 | ||
eebce385 MS |
540 | static int netiucv_callback_connreq(struct iucv_path *path, |
541 | u8 ipvmid[8], u8 ipuser[16]) | |
1da177e4 | 542 | { |
eebce385 | 543 | struct iucv_connection *conn = path->private; |
1da177e4 | 544 | struct iucv_event ev; |
eebce385 | 545 | int rc; |
1da177e4 | 546 | |
eebce385 MS |
547 | if (memcmp(iucvMagic, ipuser, sizeof(ipuser))) |
548 | /* ipuser must match iucvMagic. */ | |
549 | return -EINVAL; | |
550 | rc = -EINVAL; | |
551 | read_lock_bh(&iucv_connection_rwlock); | |
552 | list_for_each_entry(conn, &iucv_connection_list, list) { | |
553 | if (strncmp(ipvmid, conn->userid, 8)) | |
554 | continue; | |
555 | /* Found a matching connection for this path. */ | |
556 | conn->path = path; | |
557 | ev.conn = conn; | |
558 | ev.data = path; | |
559 | fsm_event(conn->fsm, CONN_EVENT_CONN_REQ, &ev); | |
560 | rc = 0; | |
561 | } | |
562 | read_unlock_bh(&iucv_connection_rwlock); | |
563 | return rc; | |
1da177e4 LT |
564 | } |
565 | ||
eebce385 | 566 | static void netiucv_callback_connrej(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 567 | { |
eebce385 | 568 | struct iucv_connection *conn = path->private; |
1da177e4 | 569 | |
eebce385 | 570 | fsm_event(conn->fsm, CONN_EVENT_CONN_REJ, conn); |
1da177e4 LT |
571 | } |
572 | ||
eebce385 | 573 | static void netiucv_callback_connsusp(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 574 | { |
eebce385 | 575 | struct iucv_connection *conn = path->private; |
1da177e4 | 576 | |
eebce385 | 577 | fsm_event(conn->fsm, CONN_EVENT_CONN_SUS, conn); |
1da177e4 LT |
578 | } |
579 | ||
eebce385 | 580 | static void netiucv_callback_connres(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 581 | { |
eebce385 | 582 | struct iucv_connection *conn = path->private; |
1da177e4 | 583 | |
eebce385 MS |
584 | fsm_event(conn->fsm, CONN_EVENT_CONN_RES, conn); |
585 | } | |
1da177e4 LT |
586 | |
587 | /** | |
588 | * Dummy NOP action for all statemachines | |
589 | */ | |
eebce385 | 590 | static void fsm_action_nop(fsm_instance *fi, int event, void *arg) |
1da177e4 LT |
591 | { |
592 | } | |
e82b0f2c | 593 | |
eebce385 | 594 | /* |
1da177e4 | 595 | * Actions of the connection statemachine |
eebce385 | 596 | */ |
1da177e4 LT |
597 | |
598 | /** | |
eebce385 MS |
599 | * netiucv_unpack_skb |
600 | * @conn: The connection where this skb has been received. | |
601 | * @pskb: The received skb. | |
1da177e4 | 602 | * |
eebce385 MS |
603 | * Unpack a just received skb and hand it over to upper layers. |
604 | * Helper function for conn_action_rx. | |
1da177e4 | 605 | */ |
eebce385 MS |
606 | static void netiucv_unpack_skb(struct iucv_connection *conn, |
607 | struct sk_buff *pskb) | |
1da177e4 LT |
608 | { |
609 | struct net_device *dev = conn->netdev; | |
eebce385 MS |
610 | struct netiucv_priv *privptr = netdev_priv(dev); |
611 | u16 offset = 0; | |
1da177e4 LT |
612 | |
613 | skb_put(pskb, NETIUCV_HDRLEN); | |
614 | pskb->dev = dev; | |
615 | pskb->ip_summed = CHECKSUM_NONE; | |
616 | pskb->protocol = ntohs(ETH_P_IP); | |
617 | ||
618 | while (1) { | |
619 | struct sk_buff *skb; | |
eebce385 | 620 | struct ll_header *header = (struct ll_header *) pskb->data; |
1da177e4 LT |
621 | |
622 | if (!header->next) | |
623 | break; | |
624 | ||
625 | skb_pull(pskb, NETIUCV_HDRLEN); | |
626 | header->next -= offset; | |
627 | offset += header->next; | |
628 | header->next -= NETIUCV_HDRLEN; | |
629 | if (skb_tailroom(pskb) < header->next) { | |
630 | PRINT_WARN("%s: Illegal next field in iucv header: " | |
631 | "%d > %d\n", | |
632 | dev->name, header->next, skb_tailroom(pskb)); | |
633 | IUCV_DBF_TEXT_(data, 2, "Illegal next field: %d > %d\n", | |
634 | header->next, skb_tailroom(pskb)); | |
635 | return; | |
636 | } | |
637 | skb_put(pskb, header->next); | |
459a98ed | 638 | skb_reset_mac_header(pskb); |
1da177e4 LT |
639 | skb = dev_alloc_skb(pskb->len); |
640 | if (!skb) { | |
641 | PRINT_WARN("%s Out of memory in netiucv_unpack_skb\n", | |
642 | dev->name); | |
643 | IUCV_DBF_TEXT(data, 2, | |
644 | "Out of memory in netiucv_unpack_skb\n"); | |
645 | privptr->stats.rx_dropped++; | |
646 | return; | |
647 | } | |
648 | memcpy(skb_put(skb, pskb->len), pskb->data, pskb->len); | |
459a98ed | 649 | skb_reset_mac_header(skb); |
1da177e4 LT |
650 | skb->dev = pskb->dev; |
651 | skb->protocol = pskb->protocol; | |
652 | pskb->ip_summed = CHECKSUM_UNNECESSARY; | |
653 | /* | |
654 | * Since receiving is always initiated from a tasklet (in iucv.c), | |
655 | * we must use netif_rx_ni() instead of netif_rx() | |
656 | */ | |
657 | netif_rx_ni(skb); | |
658 | dev->last_rx = jiffies; | |
659 | privptr->stats.rx_packets++; | |
660 | privptr->stats.rx_bytes += skb->len; | |
661 | skb_pull(pskb, header->next); | |
662 | skb_put(pskb, NETIUCV_HDRLEN); | |
663 | } | |
664 | } | |
665 | ||
eebce385 | 666 | static void conn_action_rx(fsm_instance *fi, int event, void *arg) |
1da177e4 | 667 | { |
eebce385 | 668 | struct iucv_event *ev = arg; |
1da177e4 | 669 | struct iucv_connection *conn = ev->conn; |
eebce385 MS |
670 | struct iucv_message *msg = ev->data; |
671 | struct netiucv_priv *privptr = netdev_priv(conn->netdev); | |
1da177e4 LT |
672 | int rc; |
673 | ||
674 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); | |
675 | ||
676 | if (!conn->netdev) { | |
eebce385 | 677 | iucv_message_reject(conn->path, msg); |
1da177e4 LT |
678 | PRINT_WARN("Received data for unlinked connection\n"); |
679 | IUCV_DBF_TEXT(data, 2, | |
eebce385 | 680 | "Received data for unlinked connection\n"); |
1da177e4 LT |
681 | return; |
682 | } | |
eebce385 MS |
683 | if (msg->length > conn->max_buffsize) { |
684 | iucv_message_reject(conn->path, msg); | |
1da177e4 LT |
685 | privptr->stats.rx_dropped++; |
686 | PRINT_WARN("msglen %d > max_buffsize %d\n", | |
eebce385 | 687 | msg->length, conn->max_buffsize); |
1da177e4 | 688 | IUCV_DBF_TEXT_(data, 2, "msglen %d > max_buffsize %d\n", |
eebce385 | 689 | msg->length, conn->max_buffsize); |
1da177e4 LT |
690 | return; |
691 | } | |
692 | conn->rx_buff->data = conn->rx_buff->tail = conn->rx_buff->head; | |
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 LT |
720 | |
721 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); | |
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 | } | |
738 | conn->tx_buff->data = conn->tx_buff->tail = conn->tx_buff->head; | |
739 | conn->tx_buff->len = 0; | |
740 | spin_lock_irqsave(&conn->collect_lock, saveflags); | |
741 | while ((skb = skb_dequeue(&conn->collect_queue))) { | |
742 | header.next = conn->tx_buff->len + skb->len + NETIUCV_HDRLEN; | |
743 | memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, | |
744 | NETIUCV_HDRLEN); | |
745 | memcpy(skb_put(conn->tx_buff, skb->len), skb->data, skb->len); | |
746 | txbytes += skb->len; | |
747 | txpackets++; | |
748 | stat_maxcq++; | |
749 | atomic_dec(&skb->users); | |
750 | dev_kfree_skb_any(skb); | |
751 | } | |
752 | if (conn->collect_len > conn->prof.maxmulti) | |
753 | conn->prof.maxmulti = conn->collect_len; | |
754 | conn->collect_len = 0; | |
755 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); | |
eebce385 MS |
756 | if (conn->tx_buff->len == 0) { |
757 | fsm_newstate(fi, CONN_STATE_IDLE); | |
758 | return; | |
759 | } | |
1da177e4 | 760 | |
eebce385 MS |
761 | header.next = 0; |
762 | memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
763 | conn->prof.send_stamp = xtime; | |
764 | txmsg.class = 0; | |
765 | txmsg.tag = 0; | |
766 | rc = iucv_message_send(conn->path, &txmsg, 0, 0, | |
1da177e4 | 767 | conn->tx_buff->data, conn->tx_buff->len); |
eebce385 MS |
768 | conn->prof.doios_multi++; |
769 | conn->prof.txlen += conn->tx_buff->len; | |
770 | conn->prof.tx_pending++; | |
771 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) | |
772 | conn->prof.tx_max_pending = conn->prof.tx_pending; | |
773 | if (rc) { | |
774 | conn->prof.tx_pending--; | |
1da177e4 | 775 | fsm_newstate(fi, CONN_STATE_IDLE); |
eebce385 MS |
776 | if (privptr) |
777 | privptr->stats.tx_errors += txpackets; | |
778 | PRINT_WARN("iucv_send returned %08x\n", rc); | |
779 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); | |
780 | } else { | |
781 | if (privptr) { | |
782 | privptr->stats.tx_packets += txpackets; | |
783 | privptr->stats.tx_bytes += txbytes; | |
784 | } | |
785 | if (stat_maxcq > conn->prof.maxcqueue) | |
786 | conn->prof.maxcqueue = stat_maxcq; | |
787 | } | |
1da177e4 LT |
788 | } |
789 | ||
eebce385 | 790 | static void conn_action_connaccept(fsm_instance *fi, int event, void *arg) |
1da177e4 | 791 | { |
eebce385 | 792 | struct iucv_event *ev = arg; |
1da177e4 | 793 | struct iucv_connection *conn = ev->conn; |
eebce385 | 794 | struct iucv_path *path = ev->data; |
1da177e4 | 795 | struct net_device *netdev = conn->netdev; |
eebce385 | 796 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 797 | int rc; |
1da177e4 LT |
798 | |
799 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
800 | ||
eebce385 MS |
801 | conn->path = path; |
802 | path->msglim = NETIUCV_QUEUELEN_DEFAULT; | |
803 | path->flags = 0; | |
804 | rc = iucv_path_accept(path, &netiucv_handler, NULL, conn); | |
1da177e4 LT |
805 | if (rc) { |
806 | PRINT_WARN("%s: IUCV accept failed with error %d\n", | |
807 | netdev->name, rc); | |
808 | IUCV_DBF_TEXT_(setup, 2, "rc %d from iucv_accept", rc); | |
809 | return; | |
810 | } | |
811 | fsm_newstate(fi, CONN_STATE_IDLE); | |
eebce385 | 812 | netdev->tx_queue_len = conn->path->msglim; |
1da177e4 LT |
813 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); |
814 | } | |
815 | ||
eebce385 | 816 | static void conn_action_connreject(fsm_instance *fi, int event, void *arg) |
1da177e4 | 817 | { |
eebce385 MS |
818 | struct iucv_event *ev = arg; |
819 | struct iucv_path *path = ev->data; | |
1da177e4 LT |
820 | |
821 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
eebce385 | 822 | iucv_path_sever(path, NULL); |
1da177e4 LT |
823 | } |
824 | ||
eebce385 | 825 | static void conn_action_connack(fsm_instance *fi, int event, void *arg) |
1da177e4 | 826 | { |
eebce385 | 827 | struct iucv_connection *conn = arg; |
1da177e4 | 828 | struct net_device *netdev = conn->netdev; |
eebce385 | 829 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 LT |
830 | |
831 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1da177e4 LT |
832 | fsm_deltimer(&conn->timer); |
833 | fsm_newstate(fi, CONN_STATE_IDLE); | |
eebce385 | 834 | netdev->tx_queue_len = conn->path->msglim; |
1da177e4 LT |
835 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); |
836 | } | |
837 | ||
eebce385 | 838 | static void conn_action_conntimsev(fsm_instance *fi, int event, void *arg) |
1da177e4 | 839 | { |
eebce385 | 840 | struct iucv_connection *conn = arg; |
1da177e4 LT |
841 | |
842 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1da177e4 | 843 | fsm_deltimer(&conn->timer); |
eebce385 | 844 | iucv_path_sever(conn->path, NULL); |
1da177e4 LT |
845 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
846 | } | |
847 | ||
eebce385 | 848 | static void conn_action_connsever(fsm_instance *fi, int event, void *arg) |
1da177e4 | 849 | { |
eebce385 | 850 | struct iucv_connection *conn = arg; |
1da177e4 | 851 | struct net_device *netdev = conn->netdev; |
eebce385 | 852 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 LT |
853 | |
854 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
855 | ||
856 | fsm_deltimer(&conn->timer); | |
eebce385 | 857 | iucv_path_sever(conn->path, NULL); |
1da177e4 LT |
858 | PRINT_INFO("%s: Remote dropped connection\n", netdev->name); |
859 | IUCV_DBF_TEXT(data, 2, | |
eebce385 | 860 | "conn_action_connsever: Remote dropped connection\n"); |
1da177e4 LT |
861 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
862 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); | |
863 | } | |
864 | ||
eebce385 | 865 | static void conn_action_start(fsm_instance *fi, int event, void *arg) |
1da177e4 | 866 | { |
eebce385 | 867 | struct iucv_connection *conn = arg; |
1da177e4 LT |
868 | int rc; |
869 | ||
870 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
871 | ||
eebce385 | 872 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
1da177e4 | 873 | PRINT_DEBUG("%s('%s'): connecting ...\n", |
eebce385 | 874 | conn->netdev->name, conn->userid); |
1da177e4 | 875 | |
eebce385 MS |
876 | /* |
877 | * We must set the state before calling iucv_connect because the | |
878 | * callback handler could be called at any point after the connection | |
879 | * request is sent | |
880 | */ | |
1da177e4 LT |
881 | |
882 | fsm_newstate(fi, CONN_STATE_SETUPWAIT); | |
eebce385 MS |
883 | conn->path = iucv_path_alloc(NETIUCV_QUEUELEN_DEFAULT, 0, GFP_KERNEL); |
884 | rc = iucv_path_connect(conn->path, &netiucv_handler, conn->userid, | |
885 | NULL, iucvMagic, conn); | |
1da177e4 | 886 | switch (rc) { |
eebce385 MS |
887 | case 0: |
888 | conn->netdev->tx_queue_len = conn->path->msglim; | |
889 | fsm_addtimer(&conn->timer, NETIUCV_TIMEOUT_5SEC, | |
890 | CONN_EVENT_TIMER, conn); | |
891 | return; | |
892 | case 11: | |
893 | PRINT_INFO("%s: User %s is currently not available.\n", | |
894 | conn->netdev->name, | |
895 | netiucv_printname(conn->userid)); | |
896 | fsm_newstate(fi, CONN_STATE_STARTWAIT); | |
897 | break; | |
898 | case 12: | |
899 | PRINT_INFO("%s: User %s is currently not ready.\n", | |
900 | conn->netdev->name, | |
901 | netiucv_printname(conn->userid)); | |
902 | fsm_newstate(fi, CONN_STATE_STARTWAIT); | |
903 | break; | |
904 | case 13: | |
905 | PRINT_WARN("%s: Too many IUCV connections.\n", | |
906 | conn->netdev->name); | |
907 | fsm_newstate(fi, CONN_STATE_CONNERR); | |
908 | break; | |
909 | case 14: | |
910 | PRINT_WARN("%s: User %s has too many IUCV connections.\n", | |
911 | conn->netdev->name, | |
912 | netiucv_printname(conn->userid)); | |
913 | fsm_newstate(fi, CONN_STATE_CONNERR); | |
914 | break; | |
915 | case 15: | |
916 | PRINT_WARN("%s: No IUCV authorization in CP directory.\n", | |
917 | conn->netdev->name); | |
918 | fsm_newstate(fi, CONN_STATE_CONNERR); | |
919 | break; | |
920 | default: | |
921 | PRINT_WARN("%s: iucv_connect returned error %d\n", | |
922 | conn->netdev->name, rc); | |
923 | fsm_newstate(fi, CONN_STATE_CONNERR); | |
924 | break; | |
1da177e4 LT |
925 | } |
926 | IUCV_DBF_TEXT_(setup, 5, "iucv_connect rc is %d\n", rc); | |
eebce385 MS |
927 | kfree(conn->path); |
928 | conn->path = NULL; | |
1da177e4 LT |
929 | } |
930 | ||
eebce385 | 931 | static void netiucv_purge_skb_queue(struct sk_buff_head *q) |
1da177e4 LT |
932 | { |
933 | struct sk_buff *skb; | |
934 | ||
935 | while ((skb = skb_dequeue(q))) { | |
936 | atomic_dec(&skb->users); | |
937 | dev_kfree_skb_any(skb); | |
938 | } | |
939 | } | |
940 | ||
eebce385 | 941 | static void conn_action_stop(fsm_instance *fi, int event, void *arg) |
1da177e4 | 942 | { |
eebce385 | 943 | struct iucv_event *ev = arg; |
1da177e4 LT |
944 | struct iucv_connection *conn = ev->conn; |
945 | struct net_device *netdev = conn->netdev; | |
eebce385 | 946 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 LT |
947 | |
948 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
949 | ||
950 | fsm_deltimer(&conn->timer); | |
951 | fsm_newstate(fi, CONN_STATE_STOPPED); | |
952 | netiucv_purge_skb_queue(&conn->collect_queue); | |
eebce385 MS |
953 | if (conn->path) { |
954 | IUCV_DBF_TEXT(trace, 5, "calling iucv_path_sever\n"); | |
955 | iucv_path_sever(conn->path, iucvMagic); | |
956 | kfree(conn->path); | |
957 | conn->path = NULL; | |
958 | } | |
1da177e4 LT |
959 | netiucv_purge_skb_queue(&conn->commit_queue); |
960 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); | |
961 | } | |
962 | ||
eebce385 | 963 | static void conn_action_inval(fsm_instance *fi, int event, void *arg) |
1da177e4 | 964 | { |
eebce385 | 965 | struct iucv_connection *conn = arg; |
1da177e4 LT |
966 | struct net_device *netdev = conn->netdev; |
967 | ||
eebce385 | 968 | PRINT_WARN("%s: Cannot connect without username\n", netdev->name); |
1da177e4 LT |
969 | IUCV_DBF_TEXT(data, 2, "conn_action_inval called\n"); |
970 | } | |
971 | ||
972 | static const fsm_node conn_fsm[] = { | |
973 | { CONN_STATE_INVALID, CONN_EVENT_START, conn_action_inval }, | |
974 | { CONN_STATE_STOPPED, CONN_EVENT_START, conn_action_start }, | |
975 | ||
976 | { CONN_STATE_STOPPED, CONN_EVENT_STOP, conn_action_stop }, | |
977 | { CONN_STATE_STARTWAIT, CONN_EVENT_STOP, conn_action_stop }, | |
978 | { CONN_STATE_SETUPWAIT, CONN_EVENT_STOP, conn_action_stop }, | |
979 | { CONN_STATE_IDLE, CONN_EVENT_STOP, conn_action_stop }, | |
980 | { CONN_STATE_TX, CONN_EVENT_STOP, conn_action_stop }, | |
981 | { CONN_STATE_REGERR, CONN_EVENT_STOP, conn_action_stop }, | |
982 | { CONN_STATE_CONNERR, CONN_EVENT_STOP, conn_action_stop }, | |
983 | ||
984 | { CONN_STATE_STOPPED, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
985 | { CONN_STATE_STARTWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, | |
986 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, | |
987 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
988 | { CONN_STATE_TX, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
989 | ||
990 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_ACK, conn_action_connack }, | |
991 | { CONN_STATE_SETUPWAIT, CONN_EVENT_TIMER, conn_action_conntimsev }, | |
992 | ||
993 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
994 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
995 | { CONN_STATE_TX, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
996 | ||
997 | { CONN_STATE_IDLE, CONN_EVENT_RX, conn_action_rx }, | |
998 | { CONN_STATE_TX, CONN_EVENT_RX, conn_action_rx }, | |
999 | ||
1000 | { CONN_STATE_TX, CONN_EVENT_TXDONE, conn_action_txdone }, | |
1001 | { CONN_STATE_IDLE, CONN_EVENT_TXDONE, conn_action_txdone }, | |
1002 | }; | |
1003 | ||
1004 | static const int CONN_FSM_LEN = sizeof(conn_fsm) / sizeof(fsm_node); | |
1005 | ||
e82b0f2c | 1006 | |
eebce385 | 1007 | /* |
1da177e4 | 1008 | * Actions for interface - statemachine. |
eebce385 | 1009 | */ |
1da177e4 LT |
1010 | |
1011 | /** | |
eebce385 MS |
1012 | * dev_action_start |
1013 | * @fi: An instance of an interface statemachine. | |
1014 | * @event: The event, just happened. | |
1015 | * @arg: Generic pointer, casted from struct net_device * upon call. | |
1da177e4 | 1016 | * |
eebce385 | 1017 | * Startup connection by sending CONN_EVENT_START to it. |
1da177e4 | 1018 | */ |
eebce385 | 1019 | static void dev_action_start(fsm_instance *fi, int event, void *arg) |
1da177e4 | 1020 | { |
eebce385 MS |
1021 | struct net_device *dev = arg; |
1022 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 LT |
1023 | |
1024 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1025 | ||
1da177e4 | 1026 | fsm_newstate(fi, DEV_STATE_STARTWAIT); |
eebce385 | 1027 | fsm_event(privptr->conn->fsm, CONN_EVENT_START, privptr->conn); |
1da177e4 LT |
1028 | } |
1029 | ||
1030 | /** | |
1031 | * Shutdown connection by sending CONN_EVENT_STOP to it. | |
1032 | * | |
1033 | * @param fi An instance of an interface statemachine. | |
1034 | * @param event The event, just happened. | |
1035 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1036 | */ | |
1037 | static void | |
1038 | dev_action_stop(fsm_instance *fi, int event, void *arg) | |
1039 | { | |
eebce385 MS |
1040 | struct net_device *dev = arg; |
1041 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 LT |
1042 | struct iucv_event ev; |
1043 | ||
1044 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1045 | ||
1046 | ev.conn = privptr->conn; | |
1047 | ||
1048 | fsm_newstate(fi, DEV_STATE_STOPWAIT); | |
1049 | fsm_event(privptr->conn->fsm, CONN_EVENT_STOP, &ev); | |
1050 | } | |
1051 | ||
1052 | /** | |
1053 | * Called from connection statemachine | |
1054 | * when a connection is up and running. | |
1055 | * | |
1056 | * @param fi An instance of an interface statemachine. | |
1057 | * @param event The event, just happened. | |
1058 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1059 | */ | |
1060 | static void | |
1061 | dev_action_connup(fsm_instance *fi, int event, void *arg) | |
1062 | { | |
eebce385 MS |
1063 | struct net_device *dev = arg; |
1064 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 LT |
1065 | |
1066 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1067 | ||
1068 | switch (fsm_getstate(fi)) { | |
1069 | case DEV_STATE_STARTWAIT: | |
1070 | fsm_newstate(fi, DEV_STATE_RUNNING); | |
1071 | PRINT_INFO("%s: connected with remote side %s\n", | |
1072 | dev->name, privptr->conn->userid); | |
1073 | IUCV_DBF_TEXT(setup, 3, | |
1074 | "connection is up and running\n"); | |
1075 | break; | |
1076 | case DEV_STATE_STOPWAIT: | |
1077 | PRINT_INFO( | |
1078 | "%s: got connection UP event during shutdown!\n", | |
1079 | dev->name); | |
1080 | IUCV_DBF_TEXT(data, 2, | |
1081 | "dev_action_connup: in DEV_STATE_STOPWAIT\n"); | |
1082 | break; | |
1083 | } | |
1084 | } | |
1085 | ||
1086 | /** | |
1087 | * Called from connection statemachine | |
1088 | * when a connection has been shutdown. | |
1089 | * | |
1090 | * @param fi An instance of an interface statemachine. | |
1091 | * @param event The event, just happened. | |
1092 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1093 | */ | |
1094 | static void | |
1095 | dev_action_conndown(fsm_instance *fi, int event, void *arg) | |
1096 | { | |
1097 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1098 | ||
1099 | switch (fsm_getstate(fi)) { | |
1100 | case DEV_STATE_RUNNING: | |
1101 | fsm_newstate(fi, DEV_STATE_STARTWAIT); | |
1102 | break; | |
1103 | case DEV_STATE_STOPWAIT: | |
1104 | fsm_newstate(fi, DEV_STATE_STOPPED); | |
1105 | IUCV_DBF_TEXT(setup, 3, "connection is down\n"); | |
1106 | break; | |
1107 | } | |
1108 | } | |
1109 | ||
1110 | static const fsm_node dev_fsm[] = { | |
1111 | { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start }, | |
1112 | ||
1113 | { DEV_STATE_STOPWAIT, DEV_EVENT_START, dev_action_start }, | |
1114 | { DEV_STATE_STOPWAIT, DEV_EVENT_CONDOWN, dev_action_conndown }, | |
1115 | ||
1116 | { DEV_STATE_STARTWAIT, DEV_EVENT_STOP, dev_action_stop }, | |
1117 | { DEV_STATE_STARTWAIT, DEV_EVENT_CONUP, dev_action_connup }, | |
1118 | ||
1119 | { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop }, | |
1120 | { DEV_STATE_RUNNING, DEV_EVENT_CONDOWN, dev_action_conndown }, | |
1121 | { DEV_STATE_RUNNING, DEV_EVENT_CONUP, fsm_action_nop }, | |
1122 | }; | |
1123 | ||
1124 | static const int DEV_FSM_LEN = sizeof(dev_fsm) / sizeof(fsm_node); | |
1125 | ||
1126 | /** | |
1127 | * Transmit a packet. | |
1128 | * This is a helper function for netiucv_tx(). | |
1129 | * | |
1130 | * @param conn Connection to be used for sending. | |
1131 | * @param skb Pointer to struct sk_buff of packet to send. | |
1132 | * The linklevel header has already been set up | |
1133 | * by netiucv_tx(). | |
1134 | * | |
1135 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1136 | */ | |
eebce385 MS |
1137 | static int netiucv_transmit_skb(struct iucv_connection *conn, |
1138 | struct sk_buff *skb) | |
1139 | { | |
1140 | struct iucv_message msg; | |
1da177e4 | 1141 | unsigned long saveflags; |
eebce385 MS |
1142 | struct ll_header header; |
1143 | int rc; | |
1da177e4 LT |
1144 | |
1145 | if (fsm_getstate(conn->fsm) != CONN_STATE_IDLE) { | |
1146 | int l = skb->len + NETIUCV_HDRLEN; | |
1147 | ||
1148 | spin_lock_irqsave(&conn->collect_lock, saveflags); | |
1149 | if (conn->collect_len + l > | |
1150 | (conn->max_buffsize - NETIUCV_HDRLEN)) { | |
1151 | rc = -EBUSY; | |
1152 | IUCV_DBF_TEXT(data, 2, | |
eebce385 | 1153 | "EBUSY from netiucv_transmit_skb\n"); |
1da177e4 LT |
1154 | } else { |
1155 | atomic_inc(&skb->users); | |
1156 | skb_queue_tail(&conn->collect_queue, skb); | |
1157 | conn->collect_len += l; | |
eebce385 | 1158 | rc = 0; |
1da177e4 LT |
1159 | } |
1160 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); | |
1161 | } else { | |
1162 | struct sk_buff *nskb = skb; | |
1163 | /** | |
1164 | * Copy the skb to a new allocated skb in lowmem only if the | |
1165 | * data is located above 2G in memory or tailroom is < 2. | |
1166 | */ | |
1167 | unsigned long hi = | |
1168 | ((unsigned long)(skb->tail + NETIUCV_HDRLEN)) >> 31; | |
1169 | int copied = 0; | |
1170 | if (hi || (skb_tailroom(skb) < 2)) { | |
1171 | nskb = alloc_skb(skb->len + NETIUCV_HDRLEN + | |
1172 | NETIUCV_HDRLEN, GFP_ATOMIC | GFP_DMA); | |
1173 | if (!nskb) { | |
1174 | PRINT_WARN("%s: Could not allocate tx_skb\n", | |
1175 | conn->netdev->name); | |
1176 | IUCV_DBF_TEXT(data, 2, "alloc_skb failed\n"); | |
1177 | rc = -ENOMEM; | |
1178 | return rc; | |
1179 | } else { | |
1180 | skb_reserve(nskb, NETIUCV_HDRLEN); | |
1181 | memcpy(skb_put(nskb, skb->len), | |
1182 | skb->data, skb->len); | |
1183 | } | |
1184 | copied = 1; | |
1185 | } | |
1186 | /** | |
1187 | * skb now is below 2G and has enough room. Add headers. | |
1188 | */ | |
1189 | header.next = nskb->len + NETIUCV_HDRLEN; | |
1190 | memcpy(skb_push(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
1191 | header.next = 0; | |
1192 | memcpy(skb_put(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
1193 | ||
1194 | fsm_newstate(conn->fsm, CONN_STATE_TX); | |
1195 | conn->prof.send_stamp = xtime; | |
e82b0f2c | 1196 | |
eebce385 MS |
1197 | msg.tag = 1; |
1198 | msg.class = 0; | |
1199 | rc = iucv_message_send(conn->path, &msg, 0, 0, | |
1200 | nskb->data, nskb->len); | |
1da177e4 LT |
1201 | conn->prof.doios_single++; |
1202 | conn->prof.txlen += skb->len; | |
1203 | conn->prof.tx_pending++; | |
1204 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) | |
1205 | conn->prof.tx_max_pending = conn->prof.tx_pending; | |
1206 | if (rc) { | |
1207 | struct netiucv_priv *privptr; | |
1208 | fsm_newstate(conn->fsm, CONN_STATE_IDLE); | |
1209 | conn->prof.tx_pending--; | |
eebce385 | 1210 | privptr = netdev_priv(conn->netdev); |
1da177e4 LT |
1211 | if (privptr) |
1212 | privptr->stats.tx_errors++; | |
1213 | if (copied) | |
1214 | dev_kfree_skb(nskb); | |
1215 | else { | |
1216 | /** | |
1217 | * Remove our headers. They get added | |
1218 | * again on retransmit. | |
1219 | */ | |
1220 | skb_pull(skb, NETIUCV_HDRLEN); | |
1221 | skb_trim(skb, skb->len - NETIUCV_HDRLEN); | |
1222 | } | |
1223 | PRINT_WARN("iucv_send returned %08x\n", rc); | |
1224 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); | |
1225 | } else { | |
1226 | if (copied) | |
1227 | dev_kfree_skb(skb); | |
1228 | atomic_inc(&nskb->users); | |
1229 | skb_queue_tail(&conn->commit_queue, nskb); | |
1230 | } | |
1231 | } | |
1232 | ||
1233 | return rc; | |
1234 | } | |
e82b0f2c | 1235 | |
eebce385 | 1236 | /* |
1da177e4 | 1237 | * Interface API for upper network layers |
eebce385 | 1238 | */ |
1da177e4 LT |
1239 | |
1240 | /** | |
1241 | * Open an interface. | |
1242 | * Called from generic network layer when ifconfig up is run. | |
1243 | * | |
1244 | * @param dev Pointer to interface struct. | |
1245 | * | |
1246 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1247 | */ | |
eebce385 MS |
1248 | static int netiucv_open(struct net_device *dev) |
1249 | { | |
1250 | struct netiucv_priv *priv = netdev_priv(dev); | |
1251 | ||
1252 | fsm_event(priv->fsm, DEV_EVENT_START, dev); | |
1da177e4 LT |
1253 | return 0; |
1254 | } | |
1255 | ||
1256 | /** | |
1257 | * Close an interface. | |
1258 | * Called from generic network layer when ifconfig down is run. | |
1259 | * | |
1260 | * @param dev Pointer to interface struct. | |
1261 | * | |
1262 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1263 | */ | |
eebce385 MS |
1264 | static int netiucv_close(struct net_device *dev) |
1265 | { | |
1266 | struct netiucv_priv *priv = netdev_priv(dev); | |
1267 | ||
1268 | fsm_event(priv->fsm, DEV_EVENT_STOP, dev); | |
1da177e4 LT |
1269 | return 0; |
1270 | } | |
1271 | ||
1272 | /** | |
1273 | * Start transmission of a packet. | |
1274 | * Called from generic network device layer. | |
1275 | * | |
1276 | * @param skb Pointer to buffer containing the packet. | |
1277 | * @param dev Pointer to interface struct. | |
1278 | * | |
1279 | * @return 0 if packet consumed, !0 if packet rejected. | |
1280 | * Note: If we return !0, then the packet is free'd by | |
1281 | * the generic network layer. | |
1282 | */ | |
1283 | static int netiucv_tx(struct sk_buff *skb, struct net_device *dev) | |
1284 | { | |
eebce385 MS |
1285 | struct netiucv_priv *privptr = netdev_priv(dev); |
1286 | int rc; | |
1da177e4 LT |
1287 | |
1288 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); | |
1289 | /** | |
1290 | * Some sanity checks ... | |
1291 | */ | |
1292 | if (skb == NULL) { | |
1293 | PRINT_WARN("%s: NULL sk_buff passed\n", dev->name); | |
1294 | IUCV_DBF_TEXT(data, 2, "netiucv_tx: skb is NULL\n"); | |
1295 | privptr->stats.tx_dropped++; | |
1296 | return 0; | |
1297 | } | |
1298 | if (skb_headroom(skb) < NETIUCV_HDRLEN) { | |
1299 | PRINT_WARN("%s: Got sk_buff with head room < %ld bytes\n", | |
1300 | dev->name, NETIUCV_HDRLEN); | |
1301 | IUCV_DBF_TEXT(data, 2, | |
1302 | "netiucv_tx: skb_headroom < NETIUCV_HDRLEN\n"); | |
1303 | dev_kfree_skb(skb); | |
1304 | privptr->stats.tx_dropped++; | |
1305 | return 0; | |
1306 | } | |
1307 | ||
1308 | /** | |
1309 | * If connection is not running, try to restart it | |
e82b0f2c | 1310 | * and throw away packet. |
1da177e4 LT |
1311 | */ |
1312 | if (fsm_getstate(privptr->fsm) != DEV_STATE_RUNNING) { | |
1313 | fsm_event(privptr->fsm, DEV_EVENT_START, dev); | |
1314 | dev_kfree_skb(skb); | |
1315 | privptr->stats.tx_dropped++; | |
1316 | privptr->stats.tx_errors++; | |
1317 | privptr->stats.tx_carrier_errors++; | |
1318 | return 0; | |
1319 | } | |
1320 | ||
1321 | if (netiucv_test_and_set_busy(dev)) { | |
1322 | IUCV_DBF_TEXT(data, 2, "EBUSY from netiucv_tx\n"); | |
1323 | return -EBUSY; | |
1324 | } | |
1325 | dev->trans_start = jiffies; | |
eebce385 | 1326 | rc = netiucv_transmit_skb(privptr->conn, skb) != 0; |
1da177e4 LT |
1327 | netiucv_clear_busy(dev); |
1328 | return rc; | |
1329 | } | |
1330 | ||
1331 | /** | |
eebce385 MS |
1332 | * netiucv_stats |
1333 | * @dev: Pointer to interface struct. | |
1da177e4 | 1334 | * |
eebce385 | 1335 | * Returns interface statistics of a device. |
1da177e4 | 1336 | * |
eebce385 | 1337 | * Returns pointer to stats struct of this interface. |
1da177e4 | 1338 | */ |
eebce385 | 1339 | static struct net_device_stats *netiucv_stats (struct net_device * dev) |
1da177e4 | 1340 | { |
eebce385 MS |
1341 | struct netiucv_priv *priv = netdev_priv(dev); |
1342 | ||
1da177e4 | 1343 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); |
eebce385 | 1344 | return &priv->stats; |
1da177e4 LT |
1345 | } |
1346 | ||
1347 | /** | |
eebce385 MS |
1348 | * netiucv_change_mtu |
1349 | * @dev: Pointer to interface struct. | |
1350 | * @new_mtu: The new MTU to use for this interface. | |
1da177e4 | 1351 | * |
eebce385 | 1352 | * Sets MTU of an interface. |
1da177e4 | 1353 | * |
eebce385 | 1354 | * Returns 0 on success, -EINVAL if MTU is out of valid range. |
1da177e4 LT |
1355 | * (valid range is 576 .. NETIUCV_MTU_MAX). |
1356 | */ | |
eebce385 | 1357 | static int netiucv_change_mtu(struct net_device * dev, int new_mtu) |
1da177e4 LT |
1358 | { |
1359 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
eebce385 | 1360 | if (new_mtu < 576 || new_mtu > NETIUCV_MTU_MAX) { |
1da177e4 LT |
1361 | IUCV_DBF_TEXT(setup, 2, "given MTU out of valid range\n"); |
1362 | return -EINVAL; | |
1363 | } | |
1364 | dev->mtu = new_mtu; | |
1365 | return 0; | |
1366 | } | |
1367 | ||
eebce385 | 1368 | /* |
1da177e4 | 1369 | * attributes in sysfs |
eebce385 | 1370 | */ |
1da177e4 | 1371 | |
eebce385 MS |
1372 | static ssize_t user_show(struct device *dev, struct device_attribute *attr, |
1373 | char *buf) | |
1da177e4 LT |
1374 | { |
1375 | struct netiucv_priv *priv = dev->driver_data; | |
1376 | ||
1377 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1378 | return sprintf(buf, "%s\n", netiucv_printname(priv->conn->userid)); | |
1379 | } | |
1380 | ||
eebce385 MS |
1381 | static ssize_t user_write(struct device *dev, struct device_attribute *attr, |
1382 | const char *buf, size_t count) | |
1da177e4 LT |
1383 | { |
1384 | struct netiucv_priv *priv = dev->driver_data; | |
1385 | struct net_device *ndev = priv->conn->netdev; | |
1386 | char *p; | |
1387 | char *tmp; | |
16a83b30 | 1388 | char username[9]; |
1da177e4 | 1389 | int i; |
eebce385 | 1390 | struct iucv_connection *cp; |
1da177e4 LT |
1391 | |
1392 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
eebce385 MS |
1393 | if (count > 9) { |
1394 | PRINT_WARN("netiucv: username too long (%d)!\n", (int) count); | |
1da177e4 | 1395 | IUCV_DBF_TEXT_(setup, 2, |
eebce385 | 1396 | "%d is length of username\n", (int) count); |
1da177e4 LT |
1397 | return -EINVAL; |
1398 | } | |
1399 | ||
1400 | tmp = strsep((char **) &buf, "\n"); | |
eebce385 MS |
1401 | for (i = 0, p = tmp; i < 8 && *p; i++, p++) { |
1402 | if (isalnum(*p) || (*p == '$')) { | |
16a83b30 | 1403 | username[i]= toupper(*p); |
eebce385 MS |
1404 | continue; |
1405 | } | |
1406 | if (*p == '\n') { | |
1da177e4 LT |
1407 | /* trailing lf, grr */ |
1408 | break; | |
1da177e4 | 1409 | } |
eebce385 MS |
1410 | PRINT_WARN("netiucv: Invalid char %c in username!\n", *p); |
1411 | IUCV_DBF_TEXT_(setup, 2, | |
1412 | "username: invalid character %c\n", *p); | |
1413 | return -EINVAL; | |
1da177e4 | 1414 | } |
eebce385 | 1415 | while (i < 8) |
1da177e4 | 1416 | username[i++] = ' '; |
16a83b30 | 1417 | username[8] = '\0'; |
1da177e4 | 1418 | |
eebce385 MS |
1419 | if (memcmp(username, priv->conn->userid, 9) && |
1420 | (ndev->flags & (IFF_UP | IFF_RUNNING))) { | |
1421 | /* username changed while the interface is active. */ | |
1422 | PRINT_WARN("netiucv: device %s active, connected to %s\n", | |
1423 | dev->bus_id, priv->conn->userid); | |
1424 | PRINT_WARN("netiucv: user cannot be updated\n"); | |
1425 | IUCV_DBF_TEXT(setup, 2, "user_write: device active\n"); | |
1426 | return -EBUSY; | |
1427 | } | |
1428 | read_lock_bh(&iucv_connection_rwlock); | |
1429 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
1430 | if (!strncmp(username, cp->userid, 9) && cp->netdev != ndev) { | |
1431 | read_unlock_bh(&iucv_connection_rwlock); | |
1432 | PRINT_WARN("netiucv: Connection to %s already " | |
1433 | "exists\n", username); | |
1434 | return -EEXIST; | |
1da177e4 LT |
1435 | } |
1436 | } | |
eebce385 | 1437 | read_unlock_bh(&iucv_connection_rwlock); |
1da177e4 | 1438 | memcpy(priv->conn->userid, username, 9); |
1da177e4 | 1439 | return count; |
1da177e4 LT |
1440 | } |
1441 | ||
1442 | static DEVICE_ATTR(user, 0644, user_show, user_write); | |
1443 | ||
eebce385 MS |
1444 | static ssize_t buffer_show (struct device *dev, struct device_attribute *attr, |
1445 | char *buf) | |
1446 | { struct netiucv_priv *priv = dev->driver_data; | |
1da177e4 LT |
1447 | |
1448 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1449 | return sprintf(buf, "%d\n", priv->conn->max_buffsize); | |
1450 | } | |
1451 | ||
eebce385 MS |
1452 | static ssize_t buffer_write (struct device *dev, struct device_attribute *attr, |
1453 | const char *buf, size_t count) | |
1da177e4 LT |
1454 | { |
1455 | struct netiucv_priv *priv = dev->driver_data; | |
1456 | struct net_device *ndev = priv->conn->netdev; | |
1457 | char *e; | |
1458 | int bs1; | |
1459 | ||
1460 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1461 | if (count >= 39) | |
1462 | return -EINVAL; | |
1463 | ||
1464 | bs1 = simple_strtoul(buf, &e, 0); | |
1465 | ||
1466 | if (e && (!isspace(*e))) { | |
1467 | PRINT_WARN("netiucv: Invalid character in buffer!\n"); | |
1468 | IUCV_DBF_TEXT_(setup, 2, "buffer_write: invalid char %c\n", *e); | |
1469 | return -EINVAL; | |
1470 | } | |
1471 | if (bs1 > NETIUCV_BUFSIZE_MAX) { | |
1472 | PRINT_WARN("netiucv: Given buffer size %d too large.\n", | |
1473 | bs1); | |
1474 | IUCV_DBF_TEXT_(setup, 2, | |
1475 | "buffer_write: buffer size %d too large\n", | |
1476 | bs1); | |
1477 | return -EINVAL; | |
1478 | } | |
1479 | if ((ndev->flags & IFF_RUNNING) && | |
1480 | (bs1 < (ndev->mtu + NETIUCV_HDRLEN + 2))) { | |
1481 | PRINT_WARN("netiucv: Given buffer size %d too small.\n", | |
1482 | bs1); | |
1483 | IUCV_DBF_TEXT_(setup, 2, | |
1484 | "buffer_write: buffer size %d too small\n", | |
1485 | bs1); | |
1486 | return -EINVAL; | |
1487 | } | |
1488 | if (bs1 < (576 + NETIUCV_HDRLEN + NETIUCV_HDRLEN)) { | |
1489 | PRINT_WARN("netiucv: Given buffer size %d too small.\n", | |
1490 | bs1); | |
1491 | IUCV_DBF_TEXT_(setup, 2, | |
1492 | "buffer_write: buffer size %d too small\n", | |
1493 | bs1); | |
1494 | return -EINVAL; | |
1495 | } | |
1496 | ||
1497 | priv->conn->max_buffsize = bs1; | |
1498 | if (!(ndev->flags & IFF_RUNNING)) | |
1499 | ndev->mtu = bs1 - NETIUCV_HDRLEN - NETIUCV_HDRLEN; | |
1500 | ||
1501 | return count; | |
1502 | ||
1503 | } | |
1504 | ||
1505 | static DEVICE_ATTR(buffer, 0644, buffer_show, buffer_write); | |
1506 | ||
eebce385 MS |
1507 | static ssize_t dev_fsm_show (struct device *dev, struct device_attribute *attr, |
1508 | char *buf) | |
1da177e4 LT |
1509 | { |
1510 | struct netiucv_priv *priv = dev->driver_data; | |
1511 | ||
1512 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1513 | return sprintf(buf, "%s\n", fsm_getstate_str(priv->fsm)); | |
1514 | } | |
1515 | ||
1516 | static DEVICE_ATTR(device_fsm_state, 0444, dev_fsm_show, NULL); | |
1517 | ||
eebce385 MS |
1518 | static ssize_t conn_fsm_show (struct device *dev, |
1519 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
1520 | { |
1521 | struct netiucv_priv *priv = dev->driver_data; | |
1522 | ||
1523 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1524 | return sprintf(buf, "%s\n", fsm_getstate_str(priv->conn->fsm)); | |
1525 | } | |
1526 | ||
1527 | static DEVICE_ATTR(connection_fsm_state, 0444, conn_fsm_show, NULL); | |
1528 | ||
eebce385 MS |
1529 | static ssize_t maxmulti_show (struct device *dev, |
1530 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
1531 | { |
1532 | struct netiucv_priv *priv = dev->driver_data; | |
1533 | ||
1534 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1535 | return sprintf(buf, "%ld\n", priv->conn->prof.maxmulti); | |
1536 | } | |
1537 | ||
eebce385 MS |
1538 | static ssize_t maxmulti_write (struct device *dev, |
1539 | struct device_attribute *attr, | |
1540 | const char *buf, size_t count) | |
1da177e4 LT |
1541 | { |
1542 | struct netiucv_priv *priv = dev->driver_data; | |
1543 | ||
1544 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); | |
1545 | priv->conn->prof.maxmulti = 0; | |
1546 | return count; | |
1547 | } | |
1548 | ||
1549 | static DEVICE_ATTR(max_tx_buffer_used, 0644, maxmulti_show, maxmulti_write); | |
1550 | ||
eebce385 MS |
1551 | static ssize_t maxcq_show (struct device *dev, struct device_attribute *attr, |
1552 | char *buf) | |
1da177e4 LT |
1553 | { |
1554 | struct netiucv_priv *priv = dev->driver_data; | |
1555 | ||
1556 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1557 | return sprintf(buf, "%ld\n", priv->conn->prof.maxcqueue); | |
1558 | } | |
1559 | ||
eebce385 MS |
1560 | static ssize_t maxcq_write (struct device *dev, struct device_attribute *attr, |
1561 | const char *buf, size_t count) | |
1da177e4 LT |
1562 | { |
1563 | struct netiucv_priv *priv = dev->driver_data; | |
e82b0f2c | 1564 | |
1da177e4 LT |
1565 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
1566 | priv->conn->prof.maxcqueue = 0; | |
1567 | return count; | |
1568 | } | |
1569 | ||
1570 | static DEVICE_ATTR(max_chained_skbs, 0644, maxcq_show, maxcq_write); | |
1571 | ||
eebce385 MS |
1572 | static ssize_t sdoio_show (struct device *dev, struct device_attribute *attr, |
1573 | char *buf) | |
1da177e4 LT |
1574 | { |
1575 | struct netiucv_priv *priv = dev->driver_data; | |
1576 | ||
1577 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1578 | return sprintf(buf, "%ld\n", priv->conn->prof.doios_single); | |
1579 | } | |
1580 | ||
eebce385 MS |
1581 | static ssize_t sdoio_write (struct device *dev, struct device_attribute *attr, |
1582 | const char *buf, size_t count) | |
1da177e4 LT |
1583 | { |
1584 | struct netiucv_priv *priv = dev->driver_data; | |
e82b0f2c | 1585 | |
1da177e4 LT |
1586 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
1587 | priv->conn->prof.doios_single = 0; | |
1588 | return count; | |
1589 | } | |
1590 | ||
1591 | static DEVICE_ATTR(tx_single_write_ops, 0644, sdoio_show, sdoio_write); | |
1592 | ||
eebce385 MS |
1593 | static ssize_t mdoio_show (struct device *dev, struct device_attribute *attr, |
1594 | char *buf) | |
1da177e4 LT |
1595 | { |
1596 | struct netiucv_priv *priv = dev->driver_data; | |
1597 | ||
1598 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1599 | return sprintf(buf, "%ld\n", priv->conn->prof.doios_multi); | |
1600 | } | |
1601 | ||
eebce385 MS |
1602 | static ssize_t mdoio_write (struct device *dev, struct device_attribute *attr, |
1603 | const char *buf, size_t count) | |
1da177e4 LT |
1604 | { |
1605 | struct netiucv_priv *priv = dev->driver_data; | |
e82b0f2c | 1606 | |
1da177e4 LT |
1607 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); |
1608 | priv->conn->prof.doios_multi = 0; | |
1609 | return count; | |
1610 | } | |
1611 | ||
1612 | static DEVICE_ATTR(tx_multi_write_ops, 0644, mdoio_show, mdoio_write); | |
1613 | ||
eebce385 MS |
1614 | static ssize_t txlen_show (struct device *dev, struct device_attribute *attr, |
1615 | char *buf) | |
1da177e4 LT |
1616 | { |
1617 | struct netiucv_priv *priv = dev->driver_data; | |
1618 | ||
1619 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1620 | return sprintf(buf, "%ld\n", priv->conn->prof.txlen); | |
1621 | } | |
1622 | ||
eebce385 MS |
1623 | static ssize_t txlen_write (struct device *dev, struct device_attribute *attr, |
1624 | const char *buf, size_t count) | |
1da177e4 LT |
1625 | { |
1626 | struct netiucv_priv *priv = dev->driver_data; | |
e82b0f2c | 1627 | |
1da177e4 LT |
1628 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
1629 | priv->conn->prof.txlen = 0; | |
1630 | return count; | |
1631 | } | |
1632 | ||
1633 | static DEVICE_ATTR(netto_bytes, 0644, txlen_show, txlen_write); | |
1634 | ||
eebce385 MS |
1635 | static ssize_t txtime_show (struct device *dev, struct device_attribute *attr, |
1636 | char *buf) | |
1da177e4 LT |
1637 | { |
1638 | struct netiucv_priv *priv = dev->driver_data; | |
1639 | ||
1640 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1641 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_time); | |
1642 | } | |
1643 | ||
eebce385 MS |
1644 | static ssize_t txtime_write (struct device *dev, struct device_attribute *attr, |
1645 | const char *buf, size_t count) | |
1da177e4 LT |
1646 | { |
1647 | struct netiucv_priv *priv = dev->driver_data; | |
e82b0f2c | 1648 | |
1da177e4 LT |
1649 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
1650 | priv->conn->prof.tx_time = 0; | |
1651 | return count; | |
1652 | } | |
1653 | ||
1654 | static DEVICE_ATTR(max_tx_io_time, 0644, txtime_show, txtime_write); | |
1655 | ||
eebce385 MS |
1656 | static ssize_t txpend_show (struct device *dev, struct device_attribute *attr, |
1657 | char *buf) | |
1da177e4 LT |
1658 | { |
1659 | struct netiucv_priv *priv = dev->driver_data; | |
1660 | ||
1661 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1662 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_pending); | |
1663 | } | |
1664 | ||
eebce385 MS |
1665 | static ssize_t txpend_write (struct device *dev, struct device_attribute *attr, |
1666 | const char *buf, size_t count) | |
1da177e4 LT |
1667 | { |
1668 | struct netiucv_priv *priv = dev->driver_data; | |
1669 | ||
1670 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); | |
1671 | priv->conn->prof.tx_pending = 0; | |
1672 | return count; | |
1673 | } | |
1674 | ||
1675 | static DEVICE_ATTR(tx_pending, 0644, txpend_show, txpend_write); | |
1676 | ||
eebce385 MS |
1677 | static ssize_t txmpnd_show (struct device *dev, struct device_attribute *attr, |
1678 | char *buf) | |
1da177e4 LT |
1679 | { |
1680 | struct netiucv_priv *priv = dev->driver_data; | |
1681 | ||
1682 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); | |
1683 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_max_pending); | |
1684 | } | |
1685 | ||
eebce385 MS |
1686 | static ssize_t txmpnd_write (struct device *dev, struct device_attribute *attr, |
1687 | const char *buf, size_t count) | |
1da177e4 LT |
1688 | { |
1689 | struct netiucv_priv *priv = dev->driver_data; | |
1690 | ||
1691 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); | |
1692 | priv->conn->prof.tx_max_pending = 0; | |
1693 | return count; | |
1694 | } | |
1695 | ||
1696 | static DEVICE_ATTR(tx_max_pending, 0644, txmpnd_show, txmpnd_write); | |
1697 | ||
1698 | static struct attribute *netiucv_attrs[] = { | |
1699 | &dev_attr_buffer.attr, | |
1700 | &dev_attr_user.attr, | |
1701 | NULL, | |
1702 | }; | |
1703 | ||
1704 | static struct attribute_group netiucv_attr_group = { | |
1705 | .attrs = netiucv_attrs, | |
1706 | }; | |
1707 | ||
1708 | static struct attribute *netiucv_stat_attrs[] = { | |
1709 | &dev_attr_device_fsm_state.attr, | |
1710 | &dev_attr_connection_fsm_state.attr, | |
1711 | &dev_attr_max_tx_buffer_used.attr, | |
1712 | &dev_attr_max_chained_skbs.attr, | |
1713 | &dev_attr_tx_single_write_ops.attr, | |
1714 | &dev_attr_tx_multi_write_ops.attr, | |
1715 | &dev_attr_netto_bytes.attr, | |
1716 | &dev_attr_max_tx_io_time.attr, | |
1717 | &dev_attr_tx_pending.attr, | |
1718 | &dev_attr_tx_max_pending.attr, | |
1719 | NULL, | |
1720 | }; | |
1721 | ||
1722 | static struct attribute_group netiucv_stat_attr_group = { | |
1723 | .name = "stats", | |
1724 | .attrs = netiucv_stat_attrs, | |
1725 | }; | |
1726 | ||
eebce385 | 1727 | static inline int netiucv_add_files(struct device *dev) |
1da177e4 LT |
1728 | { |
1729 | int ret; | |
1730 | ||
1731 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1732 | ret = sysfs_create_group(&dev->kobj, &netiucv_attr_group); | |
1733 | if (ret) | |
1734 | return ret; | |
1735 | ret = sysfs_create_group(&dev->kobj, &netiucv_stat_attr_group); | |
1736 | if (ret) | |
1737 | sysfs_remove_group(&dev->kobj, &netiucv_attr_group); | |
1738 | return ret; | |
1739 | } | |
1740 | ||
eebce385 | 1741 | static inline void netiucv_remove_files(struct device *dev) |
1da177e4 LT |
1742 | { |
1743 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1744 | sysfs_remove_group(&dev->kobj, &netiucv_stat_attr_group); | |
1745 | sysfs_remove_group(&dev->kobj, &netiucv_attr_group); | |
1746 | } | |
1747 | ||
eebce385 | 1748 | static int netiucv_register_device(struct net_device *ndev) |
1da177e4 | 1749 | { |
eebce385 | 1750 | struct netiucv_priv *priv = netdev_priv(ndev); |
88abaab4 | 1751 | struct device *dev = kzalloc(sizeof(struct device), GFP_KERNEL); |
1da177e4 LT |
1752 | int ret; |
1753 | ||
1754 | ||
1755 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1756 | ||
1757 | if (dev) { | |
1da177e4 LT |
1758 | snprintf(dev->bus_id, BUS_ID_SIZE, "net%s", ndev->name); |
1759 | dev->bus = &iucv_bus; | |
1760 | dev->parent = iucv_root; | |
1761 | /* | |
1762 | * The release function could be called after the | |
1763 | * module has been unloaded. It's _only_ task is to | |
1764 | * free the struct. Therefore, we specify kfree() | |
1765 | * directly here. (Probably a little bit obfuscating | |
1766 | * but legitime ...). | |
1767 | */ | |
1768 | dev->release = (void (*)(struct device *))kfree; | |
1769 | dev->driver = &netiucv_driver; | |
1770 | } else | |
1771 | return -ENOMEM; | |
1772 | ||
1773 | ret = device_register(dev); | |
1774 | ||
1775 | if (ret) | |
1776 | return ret; | |
1777 | ret = netiucv_add_files(dev); | |
1778 | if (ret) | |
1779 | goto out_unreg; | |
1780 | priv->dev = dev; | |
1781 | dev->driver_data = priv; | |
1782 | return 0; | |
1783 | ||
1784 | out_unreg: | |
1785 | device_unregister(dev); | |
1786 | return ret; | |
1787 | } | |
1788 | ||
eebce385 | 1789 | static void netiucv_unregister_device(struct device *dev) |
1da177e4 LT |
1790 | { |
1791 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1792 | netiucv_remove_files(dev); | |
1793 | device_unregister(dev); | |
1794 | } | |
1795 | ||
1796 | /** | |
1797 | * Allocate and initialize a new connection structure. | |
1798 | * Add it to the list of netiucv connections; | |
1799 | */ | |
eebce385 MS |
1800 | static struct iucv_connection *netiucv_new_connection(struct net_device *dev, |
1801 | char *username) | |
1802 | { | |
1803 | struct iucv_connection *conn; | |
1da177e4 | 1804 | |
eebce385 MS |
1805 | conn = kzalloc(sizeof(*conn), GFP_KERNEL); |
1806 | if (!conn) | |
1807 | goto out; | |
1808 | skb_queue_head_init(&conn->collect_queue); | |
1809 | skb_queue_head_init(&conn->commit_queue); | |
1810 | spin_lock_init(&conn->collect_lock); | |
1811 | conn->max_buffsize = NETIUCV_BUFSIZE_DEFAULT; | |
1812 | conn->netdev = dev; | |
1813 | ||
1814 | conn->rx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA); | |
1815 | if (!conn->rx_buff) | |
1816 | goto out_conn; | |
1817 | conn->tx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA); | |
1818 | if (!conn->tx_buff) | |
1819 | goto out_rx; | |
1820 | conn->fsm = init_fsm("netiucvconn", conn_state_names, | |
1821 | conn_event_names, NR_CONN_STATES, | |
1822 | NR_CONN_EVENTS, conn_fsm, CONN_FSM_LEN, | |
1823 | GFP_KERNEL); | |
1824 | if (!conn->fsm) | |
1825 | goto out_tx; | |
1826 | ||
1827 | fsm_settimer(conn->fsm, &conn->timer); | |
1828 | fsm_newstate(conn->fsm, CONN_STATE_INVALID); | |
1829 | ||
1830 | if (username) { | |
1831 | memcpy(conn->userid, username, 9); | |
1832 | fsm_newstate(conn->fsm, CONN_STATE_STOPPED); | |
1da177e4 | 1833 | } |
eebce385 MS |
1834 | |
1835 | write_lock_bh(&iucv_connection_rwlock); | |
1836 | list_add_tail(&conn->list, &iucv_connection_list); | |
1837 | write_unlock_bh(&iucv_connection_rwlock); | |
1da177e4 | 1838 | return conn; |
eebce385 MS |
1839 | |
1840 | out_tx: | |
1841 | kfree_skb(conn->tx_buff); | |
1842 | out_rx: | |
1843 | kfree_skb(conn->rx_buff); | |
1844 | out_conn: | |
1845 | kfree(conn); | |
1846 | out: | |
1847 | return NULL; | |
1da177e4 LT |
1848 | } |
1849 | ||
1850 | /** | |
1851 | * Release a connection structure and remove it from the | |
1852 | * list of netiucv connections. | |
1853 | */ | |
eebce385 | 1854 | static void netiucv_remove_connection(struct iucv_connection *conn) |
1da177e4 | 1855 | { |
1da177e4 | 1856 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
eebce385 MS |
1857 | write_lock_bh(&iucv_connection_rwlock); |
1858 | list_del_init(&conn->list); | |
1859 | write_unlock_bh(&iucv_connection_rwlock); | |
1860 | if (conn->path) { | |
1861 | iucv_path_sever(conn->path, iucvMagic); | |
1862 | kfree(conn->path); | |
1863 | conn->path = NULL; | |
1da177e4 | 1864 | } |
eebce385 MS |
1865 | fsm_deltimer(&conn->timer); |
1866 | kfree_fsm(conn->fsm); | |
1867 | kfree_skb(conn->rx_buff); | |
1868 | kfree_skb(conn->tx_buff); | |
1da177e4 LT |
1869 | } |
1870 | ||
1871 | /** | |
1872 | * Release everything of a net device. | |
1873 | */ | |
eebce385 | 1874 | static void netiucv_free_netdevice(struct net_device *dev) |
1da177e4 | 1875 | { |
eebce385 | 1876 | struct netiucv_priv *privptr = netdev_priv(dev); |
1da177e4 LT |
1877 | |
1878 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1879 | ||
1880 | if (!dev) | |
1881 | return; | |
1882 | ||
1da177e4 LT |
1883 | if (privptr) { |
1884 | if (privptr->conn) | |
1885 | netiucv_remove_connection(privptr->conn); | |
1886 | if (privptr->fsm) | |
1887 | kfree_fsm(privptr->fsm); | |
1888 | privptr->conn = NULL; privptr->fsm = NULL; | |
1889 | /* privptr gets freed by free_netdev() */ | |
1890 | } | |
1891 | free_netdev(dev); | |
1892 | } | |
1893 | ||
1894 | /** | |
1895 | * Initialize a net device. (Called from kernel in alloc_netdev()) | |
1896 | */ | |
eebce385 | 1897 | static void netiucv_setup_netdevice(struct net_device *dev) |
1da177e4 | 1898 | { |
1da177e4 LT |
1899 | dev->mtu = NETIUCV_MTU_DEFAULT; |
1900 | dev->hard_start_xmit = netiucv_tx; | |
1901 | dev->open = netiucv_open; | |
1902 | dev->stop = netiucv_close; | |
1903 | dev->get_stats = netiucv_stats; | |
1904 | dev->change_mtu = netiucv_change_mtu; | |
1905 | dev->destructor = netiucv_free_netdevice; | |
1906 | dev->hard_header_len = NETIUCV_HDRLEN; | |
1907 | dev->addr_len = 0; | |
1908 | dev->type = ARPHRD_SLIP; | |
1909 | dev->tx_queue_len = NETIUCV_QUEUELEN_DEFAULT; | |
1910 | dev->flags = IFF_POINTOPOINT | IFF_NOARP; | |
1911 | SET_MODULE_OWNER(dev); | |
1912 | } | |
1913 | ||
1914 | /** | |
1915 | * Allocate and initialize everything of a net device. | |
1916 | */ | |
eebce385 | 1917 | static struct net_device *netiucv_init_netdevice(char *username) |
1da177e4 LT |
1918 | { |
1919 | struct netiucv_priv *privptr; | |
1920 | struct net_device *dev; | |
1921 | ||
1922 | dev = alloc_netdev(sizeof(struct netiucv_priv), "iucv%d", | |
1923 | netiucv_setup_netdevice); | |
1924 | if (!dev) | |
1925 | return NULL; | |
eebce385 MS |
1926 | if (dev_alloc_name(dev, dev->name) < 0) |
1927 | goto out_netdev; | |
1da177e4 | 1928 | |
eebce385 | 1929 | privptr = netdev_priv(dev); |
1da177e4 LT |
1930 | privptr->fsm = init_fsm("netiucvdev", dev_state_names, |
1931 | dev_event_names, NR_DEV_STATES, NR_DEV_EVENTS, | |
1932 | dev_fsm, DEV_FSM_LEN, GFP_KERNEL); | |
eebce385 MS |
1933 | if (!privptr->fsm) |
1934 | goto out_netdev; | |
1935 | ||
1da177e4 LT |
1936 | privptr->conn = netiucv_new_connection(dev, username); |
1937 | if (!privptr->conn) { | |
1da177e4 | 1938 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_new_connection\n"); |
eebce385 | 1939 | goto out_fsm; |
1da177e4 LT |
1940 | } |
1941 | fsm_newstate(privptr->fsm, DEV_STATE_STOPPED); | |
1da177e4 | 1942 | return dev; |
eebce385 MS |
1943 | |
1944 | out_fsm: | |
1945 | kfree_fsm(privptr->fsm); | |
1946 | out_netdev: | |
1947 | free_netdev(dev); | |
1948 | return NULL; | |
1da177e4 LT |
1949 | } |
1950 | ||
eebce385 MS |
1951 | static ssize_t conn_write(struct device_driver *drv, |
1952 | const char *buf, size_t count) | |
1da177e4 | 1953 | { |
eebce385 | 1954 | const char *p; |
16a83b30 | 1955 | char username[9]; |
eebce385 | 1956 | int i, rc; |
1da177e4 | 1957 | struct net_device *dev; |
eebce385 MS |
1958 | struct netiucv_priv *priv; |
1959 | struct iucv_connection *cp; | |
1da177e4 LT |
1960 | |
1961 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
1962 | if (count>9) { | |
1963 | PRINT_WARN("netiucv: username too long (%d)!\n", (int)count); | |
1964 | IUCV_DBF_TEXT(setup, 2, "conn_write: too long\n"); | |
1965 | return -EINVAL; | |
1966 | } | |
1967 | ||
eebce385 MS |
1968 | for (i = 0, p = buf; i < 8 && *p; i++, p++) { |
1969 | if (isalnum(*p) || *p == '$') { | |
1970 | username[i] = toupper(*p); | |
1971 | continue; | |
1972 | } | |
1973 | if (*p == '\n') | |
1da177e4 LT |
1974 | /* trailing lf, grr */ |
1975 | break; | |
eebce385 MS |
1976 | PRINT_WARN("netiucv: Invalid character in username!\n"); |
1977 | IUCV_DBF_TEXT_(setup, 2, | |
1978 | "conn_write: invalid character %c\n", *p); | |
1979 | return -EINVAL; | |
1da177e4 | 1980 | } |
eebce385 | 1981 | while (i < 8) |
1da177e4 | 1982 | username[i++] = ' '; |
16a83b30 FP |
1983 | username[8] = '\0'; |
1984 | ||
eebce385 MS |
1985 | read_lock_bh(&iucv_connection_rwlock); |
1986 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
1987 | if (!strncmp(username, cp->userid, 9)) { | |
1988 | read_unlock_bh(&iucv_connection_rwlock); | |
1989 | PRINT_WARN("netiucv: Connection to %s already " | |
1990 | "exists\n", username); | |
1991 | return -EEXIST; | |
1992 | } | |
16a83b30 | 1993 | } |
eebce385 MS |
1994 | read_unlock_bh(&iucv_connection_rwlock); |
1995 | ||
1da177e4 LT |
1996 | dev = netiucv_init_netdevice(username); |
1997 | if (!dev) { | |
eebce385 MS |
1998 | PRINT_WARN("netiucv: Could not allocate network device " |
1999 | "structure for user '%s'\n", | |
2000 | netiucv_printname(username)); | |
1da177e4 LT |
2001 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_init_netdevice\n"); |
2002 | return -ENODEV; | |
2003 | } | |
2004 | ||
eebce385 MS |
2005 | rc = netiucv_register_device(dev); |
2006 | if (rc) { | |
1da177e4 | 2007 | IUCV_DBF_TEXT_(setup, 2, |
eebce385 | 2008 | "ret %d from netiucv_register_device\n", rc); |
1da177e4 LT |
2009 | goto out_free_ndev; |
2010 | } | |
2011 | ||
2012 | /* sysfs magic */ | |
eebce385 MS |
2013 | priv = netdev_priv(dev); |
2014 | SET_NETDEV_DEV(dev, priv->dev); | |
1da177e4 | 2015 | |
eebce385 MS |
2016 | rc = register_netdev(dev); |
2017 | if (rc) | |
2018 | goto out_unreg; | |
1da177e4 LT |
2019 | |
2020 | PRINT_INFO("%s: '%s'\n", dev->name, netiucv_printname(username)); | |
e82b0f2c | 2021 | |
1da177e4 LT |
2022 | return count; |
2023 | ||
eebce385 MS |
2024 | out_unreg: |
2025 | netiucv_unregister_device(priv->dev); | |
1da177e4 LT |
2026 | out_free_ndev: |
2027 | PRINT_WARN("netiucv: Could not register '%s'\n", dev->name); | |
2028 | IUCV_DBF_TEXT(setup, 2, "conn_write: could not register\n"); | |
2029 | netiucv_free_netdevice(dev); | |
eebce385 | 2030 | return rc; |
1da177e4 LT |
2031 | } |
2032 | ||
2b67fc46 | 2033 | static DRIVER_ATTR(connection, 0200, NULL, conn_write); |
1da177e4 | 2034 | |
eebce385 MS |
2035 | static ssize_t remove_write (struct device_driver *drv, |
2036 | const char *buf, size_t count) | |
1da177e4 | 2037 | { |
eebce385 | 2038 | struct iucv_connection *cp; |
1da177e4 LT |
2039 | struct net_device *ndev; |
2040 | struct netiucv_priv *priv; | |
2041 | struct device *dev; | |
2042 | char name[IFNAMSIZ]; | |
eebce385 | 2043 | const char *p; |
1da177e4 LT |
2044 | int i; |
2045 | ||
2046 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); | |
2047 | ||
2048 | if (count >= IFNAMSIZ) | |
16a83b30 | 2049 | count = IFNAMSIZ - 1;; |
1da177e4 | 2050 | |
eebce385 MS |
2051 | for (i = 0, p = buf; i < count && *p; i++, p++) { |
2052 | if (*p == '\n' || *p == ' ') | |
1da177e4 LT |
2053 | /* trailing lf, grr */ |
2054 | break; | |
eebce385 | 2055 | name[i] = *p; |
1da177e4 LT |
2056 | } |
2057 | name[i] = '\0'; | |
2058 | ||
eebce385 MS |
2059 | read_lock_bh(&iucv_connection_rwlock); |
2060 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
2061 | ndev = cp->netdev; | |
2062 | priv = netdev_priv(ndev); | |
1da177e4 | 2063 | dev = priv->dev; |
eebce385 MS |
2064 | if (strncmp(name, ndev->name, count)) |
2065 | continue; | |
2066 | read_unlock_bh(&iucv_connection_rwlock); | |
1da177e4 | 2067 | if (ndev->flags & (IFF_UP | IFF_RUNNING)) { |
eebce385 MS |
2068 | PRINT_WARN("netiucv: net device %s active with peer " |
2069 | "%s\n", ndev->name, priv->conn->userid); | |
1da177e4 | 2070 | PRINT_WARN("netiucv: %s cannot be removed\n", |
eebce385 | 2071 | ndev->name); |
1da177e4 LT |
2072 | IUCV_DBF_TEXT(data, 2, "remove_write: still active\n"); |
2073 | return -EBUSY; | |
2074 | } | |
2075 | unregister_netdev(ndev); | |
2076 | netiucv_unregister_device(dev); | |
2077 | return count; | |
2078 | } | |
eebce385 | 2079 | read_unlock_bh(&iucv_connection_rwlock); |
1da177e4 LT |
2080 | PRINT_WARN("netiucv: net device %s unknown\n", name); |
2081 | IUCV_DBF_TEXT(data, 2, "remove_write: unknown device\n"); | |
2082 | return -EINVAL; | |
2083 | } | |
2084 | ||
2b67fc46 | 2085 | static DRIVER_ATTR(remove, 0200, NULL, remove_write); |
1da177e4 | 2086 | |
eebce385 MS |
2087 | static struct attribute * netiucv_drv_attrs[] = { |
2088 | &driver_attr_connection.attr, | |
2089 | &driver_attr_remove.attr, | |
2090 | NULL, | |
2091 | }; | |
2092 | ||
2093 | static struct attribute_group netiucv_drv_attr_group = { | |
2094 | .attrs = netiucv_drv_attrs, | |
2095 | }; | |
2096 | ||
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); | |
2113 | list_del(&cp->list); | |
2114 | ndev = cp->netdev; | |
2115 | priv = netdev_priv(ndev); | |
2116 | dev = priv->dev; | |
1da177e4 LT |
2117 | |
2118 | unregister_netdev(ndev); | |
2119 | netiucv_unregister_device(dev); | |
2120 | } | |
2121 | ||
eebce385 | 2122 | sysfs_remove_group(&netiucv_driver.kobj, &netiucv_drv_attr_group); |
1da177e4 | 2123 | driver_unregister(&netiucv_driver); |
eebce385 | 2124 | iucv_unregister(&netiucv_handler, 1); |
1da177e4 LT |
2125 | iucv_unregister_dbf_views(); |
2126 | ||
2127 | PRINT_INFO("NETIUCV driver unloaded\n"); | |
2128 | return; | |
2129 | } | |
2130 | ||
eebce385 | 2131 | static int __init netiucv_init(void) |
1da177e4 | 2132 | { |
eebce385 | 2133 | int rc; |
e82b0f2c | 2134 | |
eebce385 MS |
2135 | rc = iucv_register_dbf_views(); |
2136 | if (rc) | |
2137 | goto out; | |
2138 | rc = iucv_register(&netiucv_handler, 1); | |
2139 | if (rc) | |
2140 | goto out_dbf; | |
1da177e4 | 2141 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
eebce385 MS |
2142 | rc = driver_register(&netiucv_driver); |
2143 | if (rc) { | |
1da177e4 | 2144 | PRINT_ERR("NETIUCV: failed to register driver.\n"); |
eebce385 MS |
2145 | IUCV_DBF_TEXT_(setup, 2, "ret %d from driver_register\n", rc); |
2146 | goto out_iucv; | |
1da177e4 LT |
2147 | } |
2148 | ||
eebce385 MS |
2149 | rc = sysfs_create_group(&netiucv_driver.kobj, &netiucv_drv_attr_group); |
2150 | if (rc) { | |
2151 | PRINT_ERR("NETIUCV: failed to add driver attributes.\n"); | |
2152 | IUCV_DBF_TEXT_(setup, 2, | |
2153 | "ret %d - netiucv_drv_attr_group\n", rc); | |
2154 | goto out_driver; | |
1da177e4 | 2155 | } |
eebce385 MS |
2156 | netiucv_banner(); |
2157 | return rc; | |
2158 | ||
2159 | out_driver: | |
2160 | driver_unregister(&netiucv_driver); | |
2161 | out_iucv: | |
2162 | iucv_unregister(&netiucv_handler, 1); | |
2163 | out_dbf: | |
2164 | iucv_unregister_dbf_views(); | |
2165 | out: | |
2166 | return rc; | |
1da177e4 | 2167 | } |
e82b0f2c | 2168 | |
1da177e4 LT |
2169 | module_init(netiucv_init); |
2170 | module_exit(netiucv_exit); | |
2171 | MODULE_LICENSE("GPL"); |