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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * IUCV network driver |
3 | * | |
1175b257 | 4 | * Copyright IBM Corp. 2001, 2009 |
1da177e4 | 5 | * |
1175b257 UB |
6 | * Author(s): |
7 | * Original netiucv driver: | |
8 | * Fritz Elfert (elfert@de.ibm.com, felfert@millenux.com) | |
9 | * Sysfs integration and all bugs therein: | |
10 | * Cornelia Huck (cornelia.huck@de.ibm.com) | |
11 | * PM functions: | |
12 | * Ursula Braun (ursula.braun@de.ibm.com) | |
1da177e4 LT |
13 | * |
14 | * Documentation used: | |
15 | * the source of the original IUCV driver by: | |
16 | * Stefan Hegewald <hegewald@de.ibm.com> | |
17 | * Hartmut Penner <hpenner@de.ibm.com> | |
18 | * Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) | |
19 | * Martin Schwidefsky (schwidefsky@de.ibm.com) | |
20 | * Alan Altmark (Alan_Altmark@us.ibm.com) Sept. 2000 | |
21 | * | |
22 | * This program is free software; you can redistribute it and/or modify | |
23 | * it under the terms of the GNU General Public License as published by | |
24 | * the Free Software Foundation; either version 2, or (at your option) | |
25 | * any later version. | |
26 | * | |
27 | * This program is distributed in the hope that it will be useful, | |
28 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
29 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
30 | * GNU General Public License for more details. | |
31 | * | |
32 | * You should have received a copy of the GNU General Public License | |
33 | * along with this program; if not, write to the Free Software | |
34 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
35 | * | |
1da177e4 | 36 | */ |
e82b0f2c | 37 | |
8f7c502c UB |
38 | #define KMSG_COMPONENT "netiucv" |
39 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
40 | ||
1da177e4 LT |
41 | #undef DEBUG |
42 | ||
43 | #include <linux/module.h> | |
44 | #include <linux/init.h> | |
45 | #include <linux/kernel.h> | |
46 | #include <linux/slab.h> | |
47 | #include <linux/errno.h> | |
48 | #include <linux/types.h> | |
49 | #include <linux/interrupt.h> | |
50 | #include <linux/timer.h> | |
1da177e4 LT |
51 | #include <linux/bitops.h> |
52 | ||
53 | #include <linux/signal.h> | |
54 | #include <linux/string.h> | |
55 | #include <linux/device.h> | |
56 | ||
57 | #include <linux/ip.h> | |
58 | #include <linux/if_arp.h> | |
59 | #include <linux/tcp.h> | |
60 | #include <linux/skbuff.h> | |
61 | #include <linux/ctype.h> | |
62 | #include <net/dst.h> | |
63 | ||
64 | #include <asm/io.h> | |
65 | #include <asm/uaccess.h> | |
66 | ||
eebce385 | 67 | #include <net/iucv/iucv.h> |
1da177e4 LT |
68 | #include "fsm.h" |
69 | ||
70 | MODULE_AUTHOR | |
71 | ("(C) 2001 IBM Corporation by Fritz Elfert (felfert@millenux.com)"); | |
72 | MODULE_DESCRIPTION ("Linux for S/390 IUCV network driver"); | |
73 | ||
eebce385 MS |
74 | /** |
75 | * Debug Facility stuff | |
76 | */ | |
77 | #define IUCV_DBF_SETUP_NAME "iucv_setup" | |
78 | #define IUCV_DBF_SETUP_LEN 32 | |
79 | #define IUCV_DBF_SETUP_PAGES 2 | |
80 | #define IUCV_DBF_SETUP_NR_AREAS 1 | |
81 | #define IUCV_DBF_SETUP_LEVEL 3 | |
82 | ||
83 | #define IUCV_DBF_DATA_NAME "iucv_data" | |
84 | #define IUCV_DBF_DATA_LEN 128 | |
85 | #define IUCV_DBF_DATA_PAGES 2 | |
86 | #define IUCV_DBF_DATA_NR_AREAS 1 | |
87 | #define IUCV_DBF_DATA_LEVEL 2 | |
88 | ||
89 | #define IUCV_DBF_TRACE_NAME "iucv_trace" | |
90 | #define IUCV_DBF_TRACE_LEN 16 | |
91 | #define IUCV_DBF_TRACE_PAGES 4 | |
92 | #define IUCV_DBF_TRACE_NR_AREAS 1 | |
93 | #define IUCV_DBF_TRACE_LEVEL 3 | |
94 | ||
95 | #define IUCV_DBF_TEXT(name,level,text) \ | |
96 | do { \ | |
97 | debug_text_event(iucv_dbf_##name,level,text); \ | |
98 | } while (0) | |
99 | ||
100 | #define IUCV_DBF_HEX(name,level,addr,len) \ | |
101 | do { \ | |
102 | debug_event(iucv_dbf_##name,level,(void*)(addr),len); \ | |
103 | } while (0) | |
104 | ||
105 | DECLARE_PER_CPU(char[256], iucv_dbf_txt_buf); | |
106 | ||
f33780d3 PT |
107 | /* Allow to sort out low debug levels early to avoid wasted sprints */ |
108 | static inline int iucv_dbf_passes(debug_info_t *dbf_grp, int level) | |
109 | { | |
110 | return (level <= dbf_grp->level); | |
111 | } | |
112 | ||
113 | #define IUCV_DBF_TEXT_(name, level, text...) \ | |
114 | do { \ | |
115 | if (iucv_dbf_passes(iucv_dbf_##name, level)) { \ | |
390dfd95 TH |
116 | char* __buf = get_cpu_var(iucv_dbf_txt_buf); \ |
117 | sprintf(__buf, text); \ | |
118 | debug_text_event(iucv_dbf_##name, level, __buf); \ | |
f33780d3 PT |
119 | put_cpu_var(iucv_dbf_txt_buf); \ |
120 | } \ | |
eebce385 MS |
121 | } while (0) |
122 | ||
123 | #define IUCV_DBF_SPRINTF(name,level,text...) \ | |
124 | do { \ | |
125 | debug_sprintf_event(iucv_dbf_trace, level, ##text ); \ | |
126 | debug_sprintf_event(iucv_dbf_trace, level, text ); \ | |
127 | } while (0) | |
128 | ||
129 | /** | |
130 | * some more debug stuff | |
131 | */ | |
132 | #define IUCV_HEXDUMP16(importance,header,ptr) \ | |
133 | PRINT_##importance(header "%02x %02x %02x %02x %02x %02x %02x %02x " \ | |
134 | "%02x %02x %02x %02x %02x %02x %02x %02x\n", \ | |
135 | *(((char*)ptr)),*(((char*)ptr)+1),*(((char*)ptr)+2), \ | |
136 | *(((char*)ptr)+3),*(((char*)ptr)+4),*(((char*)ptr)+5), \ | |
137 | *(((char*)ptr)+6),*(((char*)ptr)+7),*(((char*)ptr)+8), \ | |
138 | *(((char*)ptr)+9),*(((char*)ptr)+10),*(((char*)ptr)+11), \ | |
139 | *(((char*)ptr)+12),*(((char*)ptr)+13), \ | |
140 | *(((char*)ptr)+14),*(((char*)ptr)+15)); \ | |
141 | PRINT_##importance(header "%02x %02x %02x %02x %02x %02x %02x %02x " \ | |
142 | "%02x %02x %02x %02x %02x %02x %02x %02x\n", \ | |
143 | *(((char*)ptr)+16),*(((char*)ptr)+17), \ | |
144 | *(((char*)ptr)+18),*(((char*)ptr)+19), \ | |
145 | *(((char*)ptr)+20),*(((char*)ptr)+21), \ | |
146 | *(((char*)ptr)+22),*(((char*)ptr)+23), \ | |
147 | *(((char*)ptr)+24),*(((char*)ptr)+25), \ | |
148 | *(((char*)ptr)+26),*(((char*)ptr)+27), \ | |
149 | *(((char*)ptr)+28),*(((char*)ptr)+29), \ | |
150 | *(((char*)ptr)+30),*(((char*)ptr)+31)); | |
151 | ||
1da177e4 LT |
152 | #define PRINTK_HEADER " iucv: " /* for debugging */ |
153 | ||
1175b257 UB |
154 | /* dummy device to make sure netiucv_pm functions are called */ |
155 | static struct device *netiucv_dev; | |
156 | ||
157 | static int netiucv_pm_prepare(struct device *); | |
158 | static void netiucv_pm_complete(struct device *); | |
159 | static int netiucv_pm_freeze(struct device *); | |
160 | static int netiucv_pm_restore_thaw(struct device *); | |
161 | ||
47145210 | 162 | static const struct dev_pm_ops netiucv_pm_ops = { |
1175b257 UB |
163 | .prepare = netiucv_pm_prepare, |
164 | .complete = netiucv_pm_complete, | |
165 | .freeze = netiucv_pm_freeze, | |
166 | .thaw = netiucv_pm_restore_thaw, | |
167 | .restore = netiucv_pm_restore_thaw, | |
168 | }; | |
169 | ||
1da177e4 | 170 | static struct device_driver netiucv_driver = { |
2219510f | 171 | .owner = THIS_MODULE, |
1da177e4 LT |
172 | .name = "netiucv", |
173 | .bus = &iucv_bus, | |
1175b257 | 174 | .pm = &netiucv_pm_ops, |
1da177e4 LT |
175 | }; |
176 | ||
eebce385 MS |
177 | static int netiucv_callback_connreq(struct iucv_path *, |
178 | u8 ipvmid[8], u8 ipuser[16]); | |
179 | static void netiucv_callback_connack(struct iucv_path *, u8 ipuser[16]); | |
180 | static void netiucv_callback_connrej(struct iucv_path *, u8 ipuser[16]); | |
181 | static void netiucv_callback_connsusp(struct iucv_path *, u8 ipuser[16]); | |
182 | static void netiucv_callback_connres(struct iucv_path *, u8 ipuser[16]); | |
183 | static void netiucv_callback_rx(struct iucv_path *, struct iucv_message *); | |
184 | static void netiucv_callback_txdone(struct iucv_path *, struct iucv_message *); | |
185 | ||
186 | static struct iucv_handler netiucv_handler = { | |
187 | .path_pending = netiucv_callback_connreq, | |
188 | .path_complete = netiucv_callback_connack, | |
189 | .path_severed = netiucv_callback_connrej, | |
190 | .path_quiesced = netiucv_callback_connsusp, | |
191 | .path_resumed = netiucv_callback_connres, | |
192 | .message_pending = netiucv_callback_rx, | |
193 | .message_complete = netiucv_callback_txdone | |
194 | }; | |
195 | ||
1da177e4 LT |
196 | /** |
197 | * Per connection profiling data | |
198 | */ | |
199 | struct connection_profile { | |
200 | unsigned long maxmulti; | |
201 | unsigned long maxcqueue; | |
202 | unsigned long doios_single; | |
203 | unsigned long doios_multi; | |
204 | unsigned long txlen; | |
205 | unsigned long tx_time; | |
206 | struct timespec send_stamp; | |
207 | unsigned long tx_pending; | |
208 | unsigned long tx_max_pending; | |
209 | }; | |
210 | ||
211 | /** | |
212 | * Representation of one iucv connection | |
213 | */ | |
214 | struct iucv_connection { | |
eebce385 MS |
215 | struct list_head list; |
216 | struct iucv_path *path; | |
1da177e4 LT |
217 | struct sk_buff *rx_buff; |
218 | struct sk_buff *tx_buff; | |
219 | struct sk_buff_head collect_queue; | |
220 | struct sk_buff_head commit_queue; | |
221 | spinlock_t collect_lock; | |
222 | int collect_len; | |
223 | int max_buffsize; | |
224 | fsm_timer timer; | |
225 | fsm_instance *fsm; | |
226 | struct net_device *netdev; | |
227 | struct connection_profile prof; | |
228 | char userid[9]; | |
229 | }; | |
230 | ||
231 | /** | |
232 | * Linked list of all connection structs. | |
233 | */ | |
c11ca97e | 234 | static LIST_HEAD(iucv_connection_list); |
bfac0d0b | 235 | static DEFINE_RWLOCK(iucv_connection_rwlock); |
1da177e4 LT |
236 | |
237 | /** | |
238 | * Representation of event-data for the | |
239 | * connection state machine. | |
240 | */ | |
241 | struct iucv_event { | |
242 | struct iucv_connection *conn; | |
243 | void *data; | |
244 | }; | |
245 | ||
246 | /** | |
247 | * Private part of the network device structure | |
248 | */ | |
249 | struct netiucv_priv { | |
250 | struct net_device_stats stats; | |
251 | unsigned long tbusy; | |
252 | fsm_instance *fsm; | |
253 | struct iucv_connection *conn; | |
254 | struct device *dev; | |
1175b257 | 255 | int pm_state; |
1da177e4 LT |
256 | }; |
257 | ||
258 | /** | |
259 | * Link level header for a packet. | |
260 | */ | |
eebce385 MS |
261 | struct ll_header { |
262 | u16 next; | |
263 | }; | |
1da177e4 | 264 | |
eebce385 | 265 | #define NETIUCV_HDRLEN (sizeof(struct ll_header)) |
1da177e4 LT |
266 | #define NETIUCV_BUFSIZE_MAX 32768 |
267 | #define NETIUCV_BUFSIZE_DEFAULT NETIUCV_BUFSIZE_MAX | |
268 | #define NETIUCV_MTU_MAX (NETIUCV_BUFSIZE_MAX - NETIUCV_HDRLEN) | |
269 | #define NETIUCV_MTU_DEFAULT 9216 | |
270 | #define NETIUCV_QUEUELEN_DEFAULT 50 | |
271 | #define NETIUCV_TIMEOUT_5SEC 5000 | |
272 | ||
273 | /** | |
274 | * Compatibility macros for busy handling | |
275 | * of network devices. | |
276 | */ | |
eebce385 | 277 | static inline void netiucv_clear_busy(struct net_device *dev) |
1da177e4 | 278 | { |
eebce385 MS |
279 | struct netiucv_priv *priv = netdev_priv(dev); |
280 | clear_bit(0, &priv->tbusy); | |
1da177e4 LT |
281 | netif_wake_queue(dev); |
282 | } | |
283 | ||
eebce385 | 284 | static inline int netiucv_test_and_set_busy(struct net_device *dev) |
1da177e4 | 285 | { |
eebce385 | 286 | struct netiucv_priv *priv = netdev_priv(dev); |
1da177e4 | 287 | netif_stop_queue(dev); |
eebce385 | 288 | return test_and_set_bit(0, &priv->tbusy); |
1da177e4 LT |
289 | } |
290 | ||
eebce385 | 291 | static u8 iucvMagic[16] = { |
1da177e4 LT |
292 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, |
293 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40 | |
294 | }; | |
295 | ||
1da177e4 LT |
296 | /** |
297 | * Convert an iucv userId to its printable | |
298 | * form (strip whitespace at end). | |
299 | * | |
300 | * @param An iucv userId | |
301 | * | |
302 | * @returns The printable string (static data!!) | |
303 | */ | |
d4614627 | 304 | static char *netiucv_printname(char *name) |
1da177e4 LT |
305 | { |
306 | static char tmp[9]; | |
307 | char *p = tmp; | |
308 | memcpy(tmp, name, 8); | |
309 | tmp[8] = '\0'; | |
310 | while (*p && (!isspace(*p))) | |
311 | p++; | |
312 | *p = '\0'; | |
313 | return tmp; | |
314 | } | |
e82b0f2c | 315 | |
1da177e4 LT |
316 | /** |
317 | * States of the interface statemachine. | |
318 | */ | |
319 | enum dev_states { | |
320 | DEV_STATE_STOPPED, | |
321 | DEV_STATE_STARTWAIT, | |
322 | DEV_STATE_STOPWAIT, | |
323 | DEV_STATE_RUNNING, | |
324 | /** | |
325 | * MUST be always the last element!! | |
326 | */ | |
327 | NR_DEV_STATES | |
328 | }; | |
329 | ||
330 | static const char *dev_state_names[] = { | |
331 | "Stopped", | |
332 | "StartWait", | |
333 | "StopWait", | |
334 | "Running", | |
335 | }; | |
336 | ||
337 | /** | |
338 | * Events of the interface statemachine. | |
339 | */ | |
340 | enum dev_events { | |
341 | DEV_EVENT_START, | |
342 | DEV_EVENT_STOP, | |
343 | DEV_EVENT_CONUP, | |
344 | DEV_EVENT_CONDOWN, | |
345 | /** | |
346 | * MUST be always the last element!! | |
347 | */ | |
348 | NR_DEV_EVENTS | |
349 | }; | |
350 | ||
351 | static const char *dev_event_names[] = { | |
352 | "Start", | |
353 | "Stop", | |
354 | "Connection up", | |
355 | "Connection down", | |
356 | }; | |
e82b0f2c | 357 | |
1da177e4 LT |
358 | /** |
359 | * Events of the connection statemachine | |
360 | */ | |
361 | enum conn_events { | |
362 | /** | |
363 | * Events, representing callbacks from | |
364 | * lowlevel iucv layer) | |
365 | */ | |
366 | CONN_EVENT_CONN_REQ, | |
367 | CONN_EVENT_CONN_ACK, | |
368 | CONN_EVENT_CONN_REJ, | |
369 | CONN_EVENT_CONN_SUS, | |
370 | CONN_EVENT_CONN_RES, | |
371 | CONN_EVENT_RX, | |
372 | CONN_EVENT_TXDONE, | |
373 | ||
374 | /** | |
375 | * Events, representing errors return codes from | |
376 | * calls to lowlevel iucv layer | |
377 | */ | |
378 | ||
379 | /** | |
380 | * Event, representing timer expiry. | |
381 | */ | |
382 | CONN_EVENT_TIMER, | |
383 | ||
384 | /** | |
385 | * Events, representing commands from upper levels. | |
386 | */ | |
387 | CONN_EVENT_START, | |
388 | CONN_EVENT_STOP, | |
389 | ||
390 | /** | |
391 | * MUST be always the last element!! | |
392 | */ | |
393 | NR_CONN_EVENTS, | |
394 | }; | |
395 | ||
396 | static const char *conn_event_names[] = { | |
397 | "Remote connection request", | |
398 | "Remote connection acknowledge", | |
399 | "Remote connection reject", | |
400 | "Connection suspended", | |
401 | "Connection resumed", | |
402 | "Data received", | |
403 | "Data sent", | |
404 | ||
405 | "Timer", | |
406 | ||
407 | "Start", | |
408 | "Stop", | |
409 | }; | |
410 | ||
411 | /** | |
412 | * States of the connection statemachine. | |
413 | */ | |
414 | enum conn_states { | |
415 | /** | |
416 | * Connection not assigned to any device, | |
417 | * initial state, invalid | |
418 | */ | |
419 | CONN_STATE_INVALID, | |
420 | ||
421 | /** | |
422 | * Userid assigned but not operating | |
423 | */ | |
424 | CONN_STATE_STOPPED, | |
425 | ||
426 | /** | |
427 | * Connection registered, | |
428 | * no connection request sent yet, | |
429 | * no connection request received | |
430 | */ | |
431 | CONN_STATE_STARTWAIT, | |
432 | ||
433 | /** | |
434 | * Connection registered and connection request sent, | |
435 | * no acknowledge and no connection request received yet. | |
436 | */ | |
437 | CONN_STATE_SETUPWAIT, | |
438 | ||
439 | /** | |
440 | * Connection up and running idle | |
441 | */ | |
442 | CONN_STATE_IDLE, | |
443 | ||
444 | /** | |
445 | * Data sent, awaiting CONN_EVENT_TXDONE | |
446 | */ | |
447 | CONN_STATE_TX, | |
448 | ||
449 | /** | |
450 | * Error during registration. | |
451 | */ | |
452 | CONN_STATE_REGERR, | |
453 | ||
454 | /** | |
455 | * Error during registration. | |
456 | */ | |
457 | CONN_STATE_CONNERR, | |
458 | ||
459 | /** | |
460 | * MUST be always the last element!! | |
461 | */ | |
462 | NR_CONN_STATES, | |
463 | }; | |
464 | ||
465 | static const char *conn_state_names[] = { | |
466 | "Invalid", | |
467 | "Stopped", | |
468 | "StartWait", | |
469 | "SetupWait", | |
470 | "Idle", | |
471 | "TX", | |
472 | "Terminating", | |
473 | "Registration error", | |
474 | "Connect error", | |
475 | }; | |
476 | ||
e82b0f2c | 477 | |
1da177e4 LT |
478 | /** |
479 | * Debug Facility Stuff | |
480 | */ | |
481 | static debug_info_t *iucv_dbf_setup = NULL; | |
482 | static debug_info_t *iucv_dbf_data = NULL; | |
483 | static debug_info_t *iucv_dbf_trace = NULL; | |
484 | ||
485 | DEFINE_PER_CPU(char[256], iucv_dbf_txt_buf); | |
486 | ||
eebce385 | 487 | static void iucv_unregister_dbf_views(void) |
1da177e4 LT |
488 | { |
489 | if (iucv_dbf_setup) | |
490 | debug_unregister(iucv_dbf_setup); | |
491 | if (iucv_dbf_data) | |
492 | debug_unregister(iucv_dbf_data); | |
493 | if (iucv_dbf_trace) | |
494 | debug_unregister(iucv_dbf_trace); | |
495 | } | |
eebce385 | 496 | static int iucv_register_dbf_views(void) |
1da177e4 LT |
497 | { |
498 | iucv_dbf_setup = debug_register(IUCV_DBF_SETUP_NAME, | |
66a464db | 499 | IUCV_DBF_SETUP_PAGES, |
1da177e4 LT |
500 | IUCV_DBF_SETUP_NR_AREAS, |
501 | IUCV_DBF_SETUP_LEN); | |
502 | iucv_dbf_data = debug_register(IUCV_DBF_DATA_NAME, | |
66a464db | 503 | IUCV_DBF_DATA_PAGES, |
1da177e4 LT |
504 | IUCV_DBF_DATA_NR_AREAS, |
505 | IUCV_DBF_DATA_LEN); | |
506 | iucv_dbf_trace = debug_register(IUCV_DBF_TRACE_NAME, | |
66a464db | 507 | IUCV_DBF_TRACE_PAGES, |
1da177e4 LT |
508 | IUCV_DBF_TRACE_NR_AREAS, |
509 | IUCV_DBF_TRACE_LEN); | |
510 | ||
511 | if ((iucv_dbf_setup == NULL) || (iucv_dbf_data == NULL) || | |
512 | (iucv_dbf_trace == NULL)) { | |
513 | iucv_unregister_dbf_views(); | |
514 | return -ENOMEM; | |
515 | } | |
516 | debug_register_view(iucv_dbf_setup, &debug_hex_ascii_view); | |
517 | debug_set_level(iucv_dbf_setup, IUCV_DBF_SETUP_LEVEL); | |
518 | ||
519 | debug_register_view(iucv_dbf_data, &debug_hex_ascii_view); | |
520 | debug_set_level(iucv_dbf_data, IUCV_DBF_DATA_LEVEL); | |
521 | ||
522 | debug_register_view(iucv_dbf_trace, &debug_hex_ascii_view); | |
523 | debug_set_level(iucv_dbf_trace, IUCV_DBF_TRACE_LEVEL); | |
524 | ||
525 | return 0; | |
526 | } | |
527 | ||
eebce385 | 528 | /* |
1da177e4 | 529 | * Callback-wrappers, called from lowlevel iucv layer. |
eebce385 | 530 | */ |
1da177e4 | 531 | |
eebce385 MS |
532 | static void netiucv_callback_rx(struct iucv_path *path, |
533 | struct iucv_message *msg) | |
1da177e4 | 534 | { |
eebce385 | 535 | struct iucv_connection *conn = path->private; |
1da177e4 LT |
536 | struct iucv_event ev; |
537 | ||
538 | ev.conn = conn; | |
eebce385 | 539 | ev.data = msg; |
1da177e4 LT |
540 | fsm_event(conn->fsm, CONN_EVENT_RX, &ev); |
541 | } | |
542 | ||
eebce385 MS |
543 | static void netiucv_callback_txdone(struct iucv_path *path, |
544 | struct iucv_message *msg) | |
1da177e4 | 545 | { |
eebce385 | 546 | struct iucv_connection *conn = path->private; |
1da177e4 LT |
547 | struct iucv_event ev; |
548 | ||
549 | ev.conn = conn; | |
eebce385 | 550 | ev.data = msg; |
1da177e4 LT |
551 | fsm_event(conn->fsm, CONN_EVENT_TXDONE, &ev); |
552 | } | |
553 | ||
eebce385 | 554 | static void netiucv_callback_connack(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 555 | { |
eebce385 | 556 | struct iucv_connection *conn = path->private; |
1da177e4 | 557 | |
eebce385 | 558 | fsm_event(conn->fsm, CONN_EVENT_CONN_ACK, conn); |
1da177e4 LT |
559 | } |
560 | ||
eebce385 MS |
561 | static int netiucv_callback_connreq(struct iucv_path *path, |
562 | u8 ipvmid[8], u8 ipuser[16]) | |
1da177e4 | 563 | { |
eebce385 | 564 | struct iucv_connection *conn = path->private; |
1da177e4 | 565 | struct iucv_event ev; |
eebce385 | 566 | int rc; |
1da177e4 | 567 | |
5df979d6 | 568 | if (memcmp(iucvMagic, ipuser, 16)) |
eebce385 MS |
569 | /* ipuser must match iucvMagic. */ |
570 | return -EINVAL; | |
571 | rc = -EINVAL; | |
572 | read_lock_bh(&iucv_connection_rwlock); | |
573 | list_for_each_entry(conn, &iucv_connection_list, list) { | |
574 | if (strncmp(ipvmid, conn->userid, 8)) | |
575 | continue; | |
576 | /* Found a matching connection for this path. */ | |
577 | conn->path = path; | |
578 | ev.conn = conn; | |
579 | ev.data = path; | |
580 | fsm_event(conn->fsm, CONN_EVENT_CONN_REQ, &ev); | |
581 | rc = 0; | |
582 | } | |
583 | read_unlock_bh(&iucv_connection_rwlock); | |
584 | return rc; | |
1da177e4 LT |
585 | } |
586 | ||
eebce385 | 587 | static void netiucv_callback_connrej(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 588 | { |
eebce385 | 589 | struct iucv_connection *conn = path->private; |
1da177e4 | 590 | |
eebce385 | 591 | fsm_event(conn->fsm, CONN_EVENT_CONN_REJ, conn); |
1da177e4 LT |
592 | } |
593 | ||
eebce385 | 594 | static void netiucv_callback_connsusp(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 595 | { |
eebce385 | 596 | struct iucv_connection *conn = path->private; |
1da177e4 | 597 | |
eebce385 | 598 | fsm_event(conn->fsm, CONN_EVENT_CONN_SUS, conn); |
1da177e4 LT |
599 | } |
600 | ||
eebce385 | 601 | static void netiucv_callback_connres(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 602 | { |
eebce385 | 603 | struct iucv_connection *conn = path->private; |
1da177e4 | 604 | |
eebce385 MS |
605 | fsm_event(conn->fsm, CONN_EVENT_CONN_RES, conn); |
606 | } | |
1da177e4 LT |
607 | |
608 | /** | |
21b26f2f | 609 | * NOP action for statemachines |
1da177e4 | 610 | */ |
21b26f2f | 611 | static void netiucv_action_nop(fsm_instance *fi, int event, void *arg) |
1da177e4 LT |
612 | { |
613 | } | |
e82b0f2c | 614 | |
eebce385 | 615 | /* |
1da177e4 | 616 | * Actions of the connection statemachine |
eebce385 | 617 | */ |
1da177e4 LT |
618 | |
619 | /** | |
eebce385 MS |
620 | * netiucv_unpack_skb |
621 | * @conn: The connection where this skb has been received. | |
622 | * @pskb: The received skb. | |
1da177e4 | 623 | * |
eebce385 MS |
624 | * Unpack a just received skb and hand it over to upper layers. |
625 | * Helper function for conn_action_rx. | |
1da177e4 | 626 | */ |
eebce385 MS |
627 | static void netiucv_unpack_skb(struct iucv_connection *conn, |
628 | struct sk_buff *pskb) | |
1da177e4 LT |
629 | { |
630 | struct net_device *dev = conn->netdev; | |
eebce385 MS |
631 | struct netiucv_priv *privptr = netdev_priv(dev); |
632 | u16 offset = 0; | |
1da177e4 LT |
633 | |
634 | skb_put(pskb, NETIUCV_HDRLEN); | |
635 | pskb->dev = dev; | |
636 | pskb->ip_summed = CHECKSUM_NONE; | |
637 | pskb->protocol = ntohs(ETH_P_IP); | |
638 | ||
639 | while (1) { | |
640 | struct sk_buff *skb; | |
eebce385 | 641 | struct ll_header *header = (struct ll_header *) pskb->data; |
1da177e4 LT |
642 | |
643 | if (!header->next) | |
644 | break; | |
645 | ||
646 | skb_pull(pskb, NETIUCV_HDRLEN); | |
647 | header->next -= offset; | |
648 | offset += header->next; | |
649 | header->next -= NETIUCV_HDRLEN; | |
650 | if (skb_tailroom(pskb) < header->next) { | |
1da177e4 LT |
651 | IUCV_DBF_TEXT_(data, 2, "Illegal next field: %d > %d\n", |
652 | header->next, skb_tailroom(pskb)); | |
653 | return; | |
654 | } | |
655 | skb_put(pskb, header->next); | |
459a98ed | 656 | skb_reset_mac_header(pskb); |
1da177e4 LT |
657 | skb = dev_alloc_skb(pskb->len); |
658 | if (!skb) { | |
1da177e4 LT |
659 | IUCV_DBF_TEXT(data, 2, |
660 | "Out of memory in netiucv_unpack_skb\n"); | |
661 | privptr->stats.rx_dropped++; | |
662 | return; | |
663 | } | |
d626f62b ACM |
664 | skb_copy_from_linear_data(pskb, skb_put(skb, pskb->len), |
665 | pskb->len); | |
459a98ed | 666 | skb_reset_mac_header(skb); |
1da177e4 LT |
667 | skb->dev = pskb->dev; |
668 | skb->protocol = pskb->protocol; | |
669 | pskb->ip_summed = CHECKSUM_UNNECESSARY; | |
9b3efc01 JL |
670 | privptr->stats.rx_packets++; |
671 | privptr->stats.rx_bytes += skb->len; | |
1da177e4 LT |
672 | /* |
673 | * Since receiving is always initiated from a tasklet (in iucv.c), | |
674 | * we must use netif_rx_ni() instead of netif_rx() | |
675 | */ | |
676 | netif_rx_ni(skb); | |
1da177e4 LT |
677 | skb_pull(pskb, header->next); |
678 | skb_put(pskb, NETIUCV_HDRLEN); | |
679 | } | |
680 | } | |
681 | ||
eebce385 | 682 | static void conn_action_rx(fsm_instance *fi, int event, void *arg) |
1da177e4 | 683 | { |
eebce385 | 684 | struct iucv_event *ev = arg; |
1da177e4 | 685 | struct iucv_connection *conn = ev->conn; |
eebce385 MS |
686 | struct iucv_message *msg = ev->data; |
687 | struct netiucv_priv *privptr = netdev_priv(conn->netdev); | |
1da177e4 LT |
688 | int rc; |
689 | ||
2a2cf6b1 | 690 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
691 | |
692 | if (!conn->netdev) { | |
eebce385 | 693 | iucv_message_reject(conn->path, msg); |
1da177e4 | 694 | IUCV_DBF_TEXT(data, 2, |
eebce385 | 695 | "Received data for unlinked connection\n"); |
1da177e4 LT |
696 | return; |
697 | } | |
eebce385 MS |
698 | if (msg->length > conn->max_buffsize) { |
699 | iucv_message_reject(conn->path, msg); | |
1da177e4 | 700 | privptr->stats.rx_dropped++; |
1da177e4 | 701 | IUCV_DBF_TEXT_(data, 2, "msglen %d > max_buffsize %d\n", |
eebce385 | 702 | msg->length, conn->max_buffsize); |
1da177e4 LT |
703 | return; |
704 | } | |
27a884dc ACM |
705 | conn->rx_buff->data = conn->rx_buff->head; |
706 | skb_reset_tail_pointer(conn->rx_buff); | |
1da177e4 | 707 | conn->rx_buff->len = 0; |
eebce385 MS |
708 | rc = iucv_message_receive(conn->path, msg, 0, conn->rx_buff->data, |
709 | msg->length, NULL); | |
710 | if (rc || msg->length < 5) { | |
1da177e4 | 711 | privptr->stats.rx_errors++; |
1da177e4 LT |
712 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_receive\n", rc); |
713 | return; | |
714 | } | |
715 | netiucv_unpack_skb(conn, conn->rx_buff); | |
716 | } | |
717 | ||
eebce385 | 718 | static void conn_action_txdone(fsm_instance *fi, int event, void *arg) |
1da177e4 | 719 | { |
eebce385 | 720 | struct iucv_event *ev = arg; |
1da177e4 | 721 | struct iucv_connection *conn = ev->conn; |
eebce385 MS |
722 | struct iucv_message *msg = ev->data; |
723 | struct iucv_message txmsg; | |
1da177e4 | 724 | struct netiucv_priv *privptr = NULL; |
eebce385 MS |
725 | u32 single_flag = msg->tag; |
726 | u32 txbytes = 0; | |
727 | u32 txpackets = 0; | |
728 | u32 stat_maxcq = 0; | |
1da177e4 LT |
729 | struct sk_buff *skb; |
730 | unsigned long saveflags; | |
eebce385 MS |
731 | struct ll_header header; |
732 | int rc; | |
1da177e4 | 733 | |
2a2cf6b1 | 734 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 | 735 | |
eebce385 MS |
736 | if (conn && conn->netdev) |
737 | privptr = netdev_priv(conn->netdev); | |
1da177e4 LT |
738 | conn->prof.tx_pending--; |
739 | if (single_flag) { | |
740 | if ((skb = skb_dequeue(&conn->commit_queue))) { | |
741 | atomic_dec(&skb->users); | |
1da177e4 LT |
742 | if (privptr) { |
743 | privptr->stats.tx_packets++; | |
744 | privptr->stats.tx_bytes += | |
745 | (skb->len - NETIUCV_HDRLEN | |
998221c2 | 746 | - NETIUCV_HDRLEN); |
1da177e4 | 747 | } |
998221c2 | 748 | dev_kfree_skb_any(skb); |
1da177e4 LT |
749 | } |
750 | } | |
27a884dc ACM |
751 | conn->tx_buff->data = conn->tx_buff->head; |
752 | skb_reset_tail_pointer(conn->tx_buff); | |
1da177e4 LT |
753 | conn->tx_buff->len = 0; |
754 | spin_lock_irqsave(&conn->collect_lock, saveflags); | |
755 | while ((skb = skb_dequeue(&conn->collect_queue))) { | |
756 | header.next = conn->tx_buff->len + skb->len + NETIUCV_HDRLEN; | |
757 | memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, | |
758 | NETIUCV_HDRLEN); | |
d626f62b ACM |
759 | skb_copy_from_linear_data(skb, |
760 | skb_put(conn->tx_buff, skb->len), | |
761 | skb->len); | |
1da177e4 LT |
762 | txbytes += skb->len; |
763 | txpackets++; | |
764 | stat_maxcq++; | |
765 | atomic_dec(&skb->users); | |
766 | dev_kfree_skb_any(skb); | |
767 | } | |
768 | if (conn->collect_len > conn->prof.maxmulti) | |
769 | conn->prof.maxmulti = conn->collect_len; | |
770 | conn->collect_len = 0; | |
771 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); | |
eebce385 MS |
772 | if (conn->tx_buff->len == 0) { |
773 | fsm_newstate(fi, CONN_STATE_IDLE); | |
774 | return; | |
775 | } | |
1da177e4 | 776 | |
eebce385 MS |
777 | header.next = 0; |
778 | memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
2c6b47de | 779 | conn->prof.send_stamp = current_kernel_time(); |
eebce385 MS |
780 | txmsg.class = 0; |
781 | txmsg.tag = 0; | |
782 | rc = iucv_message_send(conn->path, &txmsg, 0, 0, | |
1da177e4 | 783 | conn->tx_buff->data, conn->tx_buff->len); |
eebce385 MS |
784 | conn->prof.doios_multi++; |
785 | conn->prof.txlen += conn->tx_buff->len; | |
786 | conn->prof.tx_pending++; | |
787 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) | |
788 | conn->prof.tx_max_pending = conn->prof.tx_pending; | |
789 | if (rc) { | |
790 | conn->prof.tx_pending--; | |
1da177e4 | 791 | fsm_newstate(fi, CONN_STATE_IDLE); |
eebce385 MS |
792 | if (privptr) |
793 | privptr->stats.tx_errors += txpackets; | |
eebce385 MS |
794 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); |
795 | } else { | |
796 | if (privptr) { | |
797 | privptr->stats.tx_packets += txpackets; | |
798 | privptr->stats.tx_bytes += txbytes; | |
799 | } | |
800 | if (stat_maxcq > conn->prof.maxcqueue) | |
801 | conn->prof.maxcqueue = stat_maxcq; | |
802 | } | |
1da177e4 LT |
803 | } |
804 | ||
eebce385 | 805 | static void conn_action_connaccept(fsm_instance *fi, int event, void *arg) |
1da177e4 | 806 | { |
eebce385 | 807 | struct iucv_event *ev = arg; |
1da177e4 | 808 | struct iucv_connection *conn = ev->conn; |
eebce385 | 809 | struct iucv_path *path = ev->data; |
1da177e4 | 810 | struct net_device *netdev = conn->netdev; |
eebce385 | 811 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 812 | int rc; |
1da177e4 | 813 | |
2a2cf6b1 | 814 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 815 | |
eebce385 MS |
816 | conn->path = path; |
817 | path->msglim = NETIUCV_QUEUELEN_DEFAULT; | |
818 | path->flags = 0; | |
819 | rc = iucv_path_accept(path, &netiucv_handler, NULL, conn); | |
1da177e4 | 820 | if (rc) { |
1da177e4 LT |
821 | IUCV_DBF_TEXT_(setup, 2, "rc %d from iucv_accept", rc); |
822 | return; | |
823 | } | |
824 | fsm_newstate(fi, CONN_STATE_IDLE); | |
eebce385 | 825 | netdev->tx_queue_len = conn->path->msglim; |
1da177e4 LT |
826 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); |
827 | } | |
828 | ||
eebce385 | 829 | static void conn_action_connreject(fsm_instance *fi, int event, void *arg) |
1da177e4 | 830 | { |
eebce385 MS |
831 | struct iucv_event *ev = arg; |
832 | struct iucv_path *path = ev->data; | |
1da177e4 | 833 | |
2a2cf6b1 | 834 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 | 835 | iucv_path_sever(path, NULL); |
1da177e4 LT |
836 | } |
837 | ||
eebce385 | 838 | static void conn_action_connack(fsm_instance *fi, int event, void *arg) |
1da177e4 | 839 | { |
eebce385 | 840 | struct iucv_connection *conn = arg; |
1da177e4 | 841 | struct net_device *netdev = conn->netdev; |
eebce385 | 842 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 843 | |
2a2cf6b1 | 844 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
845 | fsm_deltimer(&conn->timer); |
846 | fsm_newstate(fi, CONN_STATE_IDLE); | |
eebce385 | 847 | netdev->tx_queue_len = conn->path->msglim; |
1da177e4 LT |
848 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); |
849 | } | |
850 | ||
eebce385 | 851 | static void conn_action_conntimsev(fsm_instance *fi, int event, void *arg) |
1da177e4 | 852 | { |
eebce385 | 853 | struct iucv_connection *conn = arg; |
1da177e4 | 854 | |
2a2cf6b1 | 855 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 856 | fsm_deltimer(&conn->timer); |
eebce385 | 857 | iucv_path_sever(conn->path, NULL); |
1da177e4 LT |
858 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
859 | } | |
860 | ||
eebce385 | 861 | static void conn_action_connsever(fsm_instance *fi, int event, void *arg) |
1da177e4 | 862 | { |
eebce385 | 863 | struct iucv_connection *conn = arg; |
1da177e4 | 864 | struct net_device *netdev = conn->netdev; |
eebce385 | 865 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 866 | |
2a2cf6b1 | 867 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
868 | |
869 | fsm_deltimer(&conn->timer); | |
eebce385 | 870 | iucv_path_sever(conn->path, NULL); |
8f7c502c UB |
871 | dev_info(privptr->dev, "The peer interface of the IUCV device" |
872 | " has closed the connection\n"); | |
1da177e4 | 873 | IUCV_DBF_TEXT(data, 2, |
eebce385 | 874 | "conn_action_connsever: Remote dropped connection\n"); |
1da177e4 LT |
875 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
876 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); | |
877 | } | |
878 | ||
eebce385 | 879 | static void conn_action_start(fsm_instance *fi, int event, void *arg) |
1da177e4 | 880 | { |
eebce385 | 881 | struct iucv_connection *conn = arg; |
8f7c502c UB |
882 | struct net_device *netdev = conn->netdev; |
883 | struct netiucv_priv *privptr = netdev_priv(netdev); | |
1da177e4 LT |
884 | int rc; |
885 | ||
2a2cf6b1 | 886 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 887 | |
eebce385 | 888 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
f082bcae | 889 | IUCV_DBF_TEXT_(setup, 2, "%s('%s'): connecting ...\n", |
8f7c502c | 890 | netdev->name, conn->userid); |
1da177e4 | 891 | |
eebce385 MS |
892 | /* |
893 | * We must set the state before calling iucv_connect because the | |
894 | * callback handler could be called at any point after the connection | |
895 | * request is sent | |
896 | */ | |
1da177e4 LT |
897 | |
898 | fsm_newstate(fi, CONN_STATE_SETUPWAIT); | |
eebce385 MS |
899 | conn->path = iucv_path_alloc(NETIUCV_QUEUELEN_DEFAULT, 0, GFP_KERNEL); |
900 | rc = iucv_path_connect(conn->path, &netiucv_handler, conn->userid, | |
901 | NULL, iucvMagic, conn); | |
1da177e4 | 902 | switch (rc) { |
eebce385 | 903 | case 0: |
8f7c502c | 904 | netdev->tx_queue_len = conn->path->msglim; |
eebce385 MS |
905 | fsm_addtimer(&conn->timer, NETIUCV_TIMEOUT_5SEC, |
906 | CONN_EVENT_TIMER, conn); | |
907 | return; | |
908 | case 11: | |
8f7c502c UB |
909 | dev_warn(privptr->dev, |
910 | "The IUCV device failed to connect to z/VM guest %s\n", | |
911 | netiucv_printname(conn->userid)); | |
eebce385 MS |
912 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
913 | break; | |
914 | case 12: | |
8f7c502c UB |
915 | dev_warn(privptr->dev, |
916 | "The IUCV device failed to connect to the peer on z/VM" | |
917 | " guest %s\n", netiucv_printname(conn->userid)); | |
eebce385 MS |
918 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
919 | break; | |
920 | case 13: | |
8f7c502c UB |
921 | dev_err(privptr->dev, |
922 | "Connecting the IUCV device would exceed the maximum" | |
923 | " number of IUCV connections\n"); | |
eebce385 MS |
924 | fsm_newstate(fi, CONN_STATE_CONNERR); |
925 | break; | |
926 | case 14: | |
8f7c502c UB |
927 | dev_err(privptr->dev, |
928 | "z/VM guest %s has too many IUCV connections" | |
929 | " to connect with the IUCV device\n", | |
930 | netiucv_printname(conn->userid)); | |
eebce385 MS |
931 | fsm_newstate(fi, CONN_STATE_CONNERR); |
932 | break; | |
933 | case 15: | |
8f7c502c UB |
934 | dev_err(privptr->dev, |
935 | "The IUCV device cannot connect to a z/VM guest with no" | |
936 | " IUCV authorization\n"); | |
eebce385 MS |
937 | fsm_newstate(fi, CONN_STATE_CONNERR); |
938 | break; | |
939 | default: | |
8f7c502c UB |
940 | dev_err(privptr->dev, |
941 | "Connecting the IUCV device failed with error %d\n", | |
942 | rc); | |
eebce385 MS |
943 | fsm_newstate(fi, CONN_STATE_CONNERR); |
944 | break; | |
1da177e4 LT |
945 | } |
946 | IUCV_DBF_TEXT_(setup, 5, "iucv_connect rc is %d\n", rc); | |
eebce385 MS |
947 | kfree(conn->path); |
948 | conn->path = NULL; | |
1da177e4 LT |
949 | } |
950 | ||
eebce385 | 951 | static void netiucv_purge_skb_queue(struct sk_buff_head *q) |
1da177e4 LT |
952 | { |
953 | struct sk_buff *skb; | |
954 | ||
955 | while ((skb = skb_dequeue(q))) { | |
956 | atomic_dec(&skb->users); | |
957 | dev_kfree_skb_any(skb); | |
958 | } | |
959 | } | |
960 | ||
eebce385 | 961 | static void conn_action_stop(fsm_instance *fi, int event, void *arg) |
1da177e4 | 962 | { |
eebce385 | 963 | struct iucv_event *ev = arg; |
1da177e4 LT |
964 | struct iucv_connection *conn = ev->conn; |
965 | struct net_device *netdev = conn->netdev; | |
eebce385 | 966 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 967 | |
2a2cf6b1 | 968 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
969 | |
970 | fsm_deltimer(&conn->timer); | |
971 | fsm_newstate(fi, CONN_STATE_STOPPED); | |
972 | netiucv_purge_skb_queue(&conn->collect_queue); | |
eebce385 MS |
973 | if (conn->path) { |
974 | IUCV_DBF_TEXT(trace, 5, "calling iucv_path_sever\n"); | |
975 | iucv_path_sever(conn->path, iucvMagic); | |
976 | kfree(conn->path); | |
977 | conn->path = NULL; | |
978 | } | |
1da177e4 LT |
979 | netiucv_purge_skb_queue(&conn->commit_queue); |
980 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); | |
981 | } | |
982 | ||
eebce385 | 983 | static void conn_action_inval(fsm_instance *fi, int event, void *arg) |
1da177e4 | 984 | { |
eebce385 | 985 | struct iucv_connection *conn = arg; |
1da177e4 LT |
986 | struct net_device *netdev = conn->netdev; |
987 | ||
f082bcae UB |
988 | IUCV_DBF_TEXT_(data, 2, "%s('%s'): conn_action_inval called\n", |
989 | netdev->name, conn->userid); | |
1da177e4 LT |
990 | } |
991 | ||
992 | static const fsm_node conn_fsm[] = { | |
993 | { CONN_STATE_INVALID, CONN_EVENT_START, conn_action_inval }, | |
994 | { CONN_STATE_STOPPED, CONN_EVENT_START, conn_action_start }, | |
995 | ||
996 | { CONN_STATE_STOPPED, CONN_EVENT_STOP, conn_action_stop }, | |
997 | { CONN_STATE_STARTWAIT, CONN_EVENT_STOP, conn_action_stop }, | |
998 | { CONN_STATE_SETUPWAIT, CONN_EVENT_STOP, conn_action_stop }, | |
999 | { CONN_STATE_IDLE, CONN_EVENT_STOP, conn_action_stop }, | |
1000 | { CONN_STATE_TX, CONN_EVENT_STOP, conn_action_stop }, | |
1001 | { CONN_STATE_REGERR, CONN_EVENT_STOP, conn_action_stop }, | |
1002 | { CONN_STATE_CONNERR, CONN_EVENT_STOP, conn_action_stop }, | |
1003 | ||
1004 | { CONN_STATE_STOPPED, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
1005 | { CONN_STATE_STARTWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, | |
1006 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, | |
1007 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
1008 | { CONN_STATE_TX, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
1009 | ||
1010 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_ACK, conn_action_connack }, | |
1011 | { CONN_STATE_SETUPWAIT, CONN_EVENT_TIMER, conn_action_conntimsev }, | |
1012 | ||
1013 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
1014 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
1015 | { CONN_STATE_TX, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
1016 | ||
1017 | { CONN_STATE_IDLE, CONN_EVENT_RX, conn_action_rx }, | |
1018 | { CONN_STATE_TX, CONN_EVENT_RX, conn_action_rx }, | |
1019 | ||
1020 | { CONN_STATE_TX, CONN_EVENT_TXDONE, conn_action_txdone }, | |
1021 | { CONN_STATE_IDLE, CONN_EVENT_TXDONE, conn_action_txdone }, | |
1022 | }; | |
1023 | ||
1024 | static const int CONN_FSM_LEN = sizeof(conn_fsm) / sizeof(fsm_node); | |
1025 | ||
e82b0f2c | 1026 | |
eebce385 | 1027 | /* |
1da177e4 | 1028 | * Actions for interface - statemachine. |
eebce385 | 1029 | */ |
1da177e4 LT |
1030 | |
1031 | /** | |
eebce385 MS |
1032 | * dev_action_start |
1033 | * @fi: An instance of an interface statemachine. | |
1034 | * @event: The event, just happened. | |
1035 | * @arg: Generic pointer, casted from struct net_device * upon call. | |
1da177e4 | 1036 | * |
eebce385 | 1037 | * Startup connection by sending CONN_EVENT_START to it. |
1da177e4 | 1038 | */ |
eebce385 | 1039 | static void dev_action_start(fsm_instance *fi, int event, void *arg) |
1da177e4 | 1040 | { |
eebce385 MS |
1041 | struct net_device *dev = arg; |
1042 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 | 1043 | |
2a2cf6b1 | 1044 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 1045 | |
1da177e4 | 1046 | fsm_newstate(fi, DEV_STATE_STARTWAIT); |
eebce385 | 1047 | fsm_event(privptr->conn->fsm, CONN_EVENT_START, privptr->conn); |
1da177e4 LT |
1048 | } |
1049 | ||
1050 | /** | |
1051 | * Shutdown connection by sending CONN_EVENT_STOP to it. | |
1052 | * | |
1053 | * @param fi An instance of an interface statemachine. | |
1054 | * @param event The event, just happened. | |
1055 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1056 | */ | |
1057 | static void | |
1058 | dev_action_stop(fsm_instance *fi, int event, void *arg) | |
1059 | { | |
eebce385 MS |
1060 | struct net_device *dev = arg; |
1061 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 LT |
1062 | struct iucv_event ev; |
1063 | ||
2a2cf6b1 | 1064 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1065 | |
1066 | ev.conn = privptr->conn; | |
1067 | ||
1068 | fsm_newstate(fi, DEV_STATE_STOPWAIT); | |
1069 | fsm_event(privptr->conn->fsm, CONN_EVENT_STOP, &ev); | |
1070 | } | |
1071 | ||
1072 | /** | |
1073 | * Called from connection statemachine | |
1074 | * when a connection is up and running. | |
1075 | * | |
1076 | * @param fi An instance of an interface statemachine. | |
1077 | * @param event The event, just happened. | |
1078 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1079 | */ | |
1080 | static void | |
1081 | dev_action_connup(fsm_instance *fi, int event, void *arg) | |
1082 | { | |
eebce385 MS |
1083 | struct net_device *dev = arg; |
1084 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 | 1085 | |
2a2cf6b1 | 1086 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1087 | |
1088 | switch (fsm_getstate(fi)) { | |
1089 | case DEV_STATE_STARTWAIT: | |
1090 | fsm_newstate(fi, DEV_STATE_RUNNING); | |
8f7c502c UB |
1091 | dev_info(privptr->dev, |
1092 | "The IUCV device has been connected" | |
1093 | " successfully to %s\n", privptr->conn->userid); | |
1da177e4 LT |
1094 | IUCV_DBF_TEXT(setup, 3, |
1095 | "connection is up and running\n"); | |
1096 | break; | |
1097 | case DEV_STATE_STOPWAIT: | |
1da177e4 LT |
1098 | IUCV_DBF_TEXT(data, 2, |
1099 | "dev_action_connup: in DEV_STATE_STOPWAIT\n"); | |
1100 | break; | |
1101 | } | |
1102 | } | |
1103 | ||
1104 | /** | |
1105 | * Called from connection statemachine | |
1106 | * when a connection has been shutdown. | |
1107 | * | |
1108 | * @param fi An instance of an interface statemachine. | |
1109 | * @param event The event, just happened. | |
1110 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1111 | */ | |
1112 | static void | |
1113 | dev_action_conndown(fsm_instance *fi, int event, void *arg) | |
1114 | { | |
2a2cf6b1 | 1115 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1116 | |
1117 | switch (fsm_getstate(fi)) { | |
1118 | case DEV_STATE_RUNNING: | |
1119 | fsm_newstate(fi, DEV_STATE_STARTWAIT); | |
1120 | break; | |
1121 | case DEV_STATE_STOPWAIT: | |
1122 | fsm_newstate(fi, DEV_STATE_STOPPED); | |
1123 | IUCV_DBF_TEXT(setup, 3, "connection is down\n"); | |
1124 | break; | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | static const fsm_node dev_fsm[] = { | |
1129 | { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start }, | |
1130 | ||
1131 | { DEV_STATE_STOPWAIT, DEV_EVENT_START, dev_action_start }, | |
1132 | { DEV_STATE_STOPWAIT, DEV_EVENT_CONDOWN, dev_action_conndown }, | |
1133 | ||
1134 | { DEV_STATE_STARTWAIT, DEV_EVENT_STOP, dev_action_stop }, | |
1135 | { DEV_STATE_STARTWAIT, DEV_EVENT_CONUP, dev_action_connup }, | |
1136 | ||
1137 | { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop }, | |
1138 | { DEV_STATE_RUNNING, DEV_EVENT_CONDOWN, dev_action_conndown }, | |
21b26f2f | 1139 | { DEV_STATE_RUNNING, DEV_EVENT_CONUP, netiucv_action_nop }, |
1da177e4 LT |
1140 | }; |
1141 | ||
1142 | static const int DEV_FSM_LEN = sizeof(dev_fsm) / sizeof(fsm_node); | |
1143 | ||
1144 | /** | |
1145 | * Transmit a packet. | |
1146 | * This is a helper function for netiucv_tx(). | |
1147 | * | |
1148 | * @param conn Connection to be used for sending. | |
1149 | * @param skb Pointer to struct sk_buff of packet to send. | |
1150 | * The linklevel header has already been set up | |
1151 | * by netiucv_tx(). | |
1152 | * | |
1153 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1154 | */ | |
eebce385 MS |
1155 | static int netiucv_transmit_skb(struct iucv_connection *conn, |
1156 | struct sk_buff *skb) | |
1157 | { | |
1158 | struct iucv_message msg; | |
1da177e4 | 1159 | unsigned long saveflags; |
eebce385 MS |
1160 | struct ll_header header; |
1161 | int rc; | |
1da177e4 LT |
1162 | |
1163 | if (fsm_getstate(conn->fsm) != CONN_STATE_IDLE) { | |
1164 | int l = skb->len + NETIUCV_HDRLEN; | |
1165 | ||
1166 | spin_lock_irqsave(&conn->collect_lock, saveflags); | |
1167 | if (conn->collect_len + l > | |
1168 | (conn->max_buffsize - NETIUCV_HDRLEN)) { | |
1169 | rc = -EBUSY; | |
1170 | IUCV_DBF_TEXT(data, 2, | |
eebce385 | 1171 | "EBUSY from netiucv_transmit_skb\n"); |
1da177e4 LT |
1172 | } else { |
1173 | atomic_inc(&skb->users); | |
1174 | skb_queue_tail(&conn->collect_queue, skb); | |
1175 | conn->collect_len += l; | |
eebce385 | 1176 | rc = 0; |
1da177e4 LT |
1177 | } |
1178 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); | |
1179 | } else { | |
1180 | struct sk_buff *nskb = skb; | |
1181 | /** | |
1182 | * Copy the skb to a new allocated skb in lowmem only if the | |
1183 | * data is located above 2G in memory or tailroom is < 2. | |
1184 | */ | |
27a884dc ACM |
1185 | unsigned long hi = ((unsigned long)(skb_tail_pointer(skb) + |
1186 | NETIUCV_HDRLEN)) >> 31; | |
1da177e4 LT |
1187 | int copied = 0; |
1188 | if (hi || (skb_tailroom(skb) < 2)) { | |
1189 | nskb = alloc_skb(skb->len + NETIUCV_HDRLEN + | |
1190 | NETIUCV_HDRLEN, GFP_ATOMIC | GFP_DMA); | |
1191 | if (!nskb) { | |
1da177e4 LT |
1192 | IUCV_DBF_TEXT(data, 2, "alloc_skb failed\n"); |
1193 | rc = -ENOMEM; | |
1194 | return rc; | |
1195 | } else { | |
1196 | skb_reserve(nskb, NETIUCV_HDRLEN); | |
1197 | memcpy(skb_put(nskb, skb->len), | |
1198 | skb->data, skb->len); | |
1199 | } | |
1200 | copied = 1; | |
1201 | } | |
1202 | /** | |
1203 | * skb now is below 2G and has enough room. Add headers. | |
1204 | */ | |
1205 | header.next = nskb->len + NETIUCV_HDRLEN; | |
1206 | memcpy(skb_push(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
1207 | header.next = 0; | |
1208 | memcpy(skb_put(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
1209 | ||
1210 | fsm_newstate(conn->fsm, CONN_STATE_TX); | |
2c6b47de | 1211 | conn->prof.send_stamp = current_kernel_time(); |
e82b0f2c | 1212 | |
eebce385 MS |
1213 | msg.tag = 1; |
1214 | msg.class = 0; | |
1215 | rc = iucv_message_send(conn->path, &msg, 0, 0, | |
1216 | nskb->data, nskb->len); | |
1da177e4 LT |
1217 | conn->prof.doios_single++; |
1218 | conn->prof.txlen += skb->len; | |
1219 | conn->prof.tx_pending++; | |
1220 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) | |
1221 | conn->prof.tx_max_pending = conn->prof.tx_pending; | |
1222 | if (rc) { | |
1223 | struct netiucv_priv *privptr; | |
1224 | fsm_newstate(conn->fsm, CONN_STATE_IDLE); | |
1225 | conn->prof.tx_pending--; | |
eebce385 | 1226 | privptr = netdev_priv(conn->netdev); |
1da177e4 LT |
1227 | if (privptr) |
1228 | privptr->stats.tx_errors++; | |
1229 | if (copied) | |
1230 | dev_kfree_skb(nskb); | |
1231 | else { | |
1232 | /** | |
1233 | * Remove our headers. They get added | |
1234 | * again on retransmit. | |
1235 | */ | |
1236 | skb_pull(skb, NETIUCV_HDRLEN); | |
1237 | skb_trim(skb, skb->len - NETIUCV_HDRLEN); | |
1238 | } | |
1da177e4 LT |
1239 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); |
1240 | } else { | |
1241 | if (copied) | |
1242 | dev_kfree_skb(skb); | |
1243 | atomic_inc(&nskb->users); | |
1244 | skb_queue_tail(&conn->commit_queue, nskb); | |
1245 | } | |
1246 | } | |
1247 | ||
1248 | return rc; | |
1249 | } | |
e82b0f2c | 1250 | |
eebce385 | 1251 | /* |
1da177e4 | 1252 | * Interface API for upper network layers |
eebce385 | 1253 | */ |
1da177e4 LT |
1254 | |
1255 | /** | |
1256 | * Open an interface. | |
1257 | * Called from generic network layer when ifconfig up is run. | |
1258 | * | |
1259 | * @param dev Pointer to interface struct. | |
1260 | * | |
1261 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1262 | */ | |
eebce385 MS |
1263 | static int netiucv_open(struct net_device *dev) |
1264 | { | |
1265 | struct netiucv_priv *priv = netdev_priv(dev); | |
1266 | ||
1267 | fsm_event(priv->fsm, DEV_EVENT_START, dev); | |
1da177e4 LT |
1268 | return 0; |
1269 | } | |
1270 | ||
1271 | /** | |
1272 | * Close an interface. | |
1273 | * Called from generic network layer when ifconfig down is run. | |
1274 | * | |
1275 | * @param dev Pointer to interface struct. | |
1276 | * | |
1277 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1278 | */ | |
eebce385 MS |
1279 | static int netiucv_close(struct net_device *dev) |
1280 | { | |
1281 | struct netiucv_priv *priv = netdev_priv(dev); | |
1282 | ||
1283 | fsm_event(priv->fsm, DEV_EVENT_STOP, dev); | |
1da177e4 LT |
1284 | return 0; |
1285 | } | |
1286 | ||
1175b257 UB |
1287 | static int netiucv_pm_prepare(struct device *dev) |
1288 | { | |
1289 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1290 | return 0; | |
1291 | } | |
1292 | ||
1293 | static void netiucv_pm_complete(struct device *dev) | |
1294 | { | |
1295 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1296 | return; | |
1297 | } | |
1298 | ||
1299 | /** | |
1300 | * netiucv_pm_freeze() - Freeze PM callback | |
1301 | * @dev: netiucv device | |
1302 | * | |
1303 | * close open netiucv interfaces | |
1304 | */ | |
1305 | static int netiucv_pm_freeze(struct device *dev) | |
1306 | { | |
4f0076f7 | 1307 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1175b257 UB |
1308 | struct net_device *ndev = NULL; |
1309 | int rc = 0; | |
1310 | ||
1311 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1312 | if (priv && priv->conn) | |
1313 | ndev = priv->conn->netdev; | |
1314 | if (!ndev) | |
1315 | goto out; | |
1316 | netif_device_detach(ndev); | |
1317 | priv->pm_state = fsm_getstate(priv->fsm); | |
1318 | rc = netiucv_close(ndev); | |
1319 | out: | |
1320 | return rc; | |
1321 | } | |
1322 | ||
1323 | /** | |
1324 | * netiucv_pm_restore_thaw() - Thaw and restore PM callback | |
1325 | * @dev: netiucv device | |
1326 | * | |
1327 | * re-open netiucv interfaces closed during freeze | |
1328 | */ | |
1329 | static int netiucv_pm_restore_thaw(struct device *dev) | |
1330 | { | |
4f0076f7 | 1331 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1175b257 UB |
1332 | struct net_device *ndev = NULL; |
1333 | int rc = 0; | |
1334 | ||
1335 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1336 | if (priv && priv->conn) | |
1337 | ndev = priv->conn->netdev; | |
1338 | if (!ndev) | |
1339 | goto out; | |
1340 | switch (priv->pm_state) { | |
1341 | case DEV_STATE_RUNNING: | |
1342 | case DEV_STATE_STARTWAIT: | |
1343 | rc = netiucv_open(ndev); | |
1344 | break; | |
1345 | default: | |
1346 | break; | |
1347 | } | |
1348 | netif_device_attach(ndev); | |
1349 | out: | |
1350 | return rc; | |
1351 | } | |
1352 | ||
1da177e4 LT |
1353 | /** |
1354 | * Start transmission of a packet. | |
1355 | * Called from generic network device layer. | |
1356 | * | |
1357 | * @param skb Pointer to buffer containing the packet. | |
1358 | * @param dev Pointer to interface struct. | |
1359 | * | |
1360 | * @return 0 if packet consumed, !0 if packet rejected. | |
1361 | * Note: If we return !0, then the packet is free'd by | |
1362 | * the generic network layer. | |
1363 | */ | |
1364 | static int netiucv_tx(struct sk_buff *skb, struct net_device *dev) | |
1365 | { | |
eebce385 MS |
1366 | struct netiucv_priv *privptr = netdev_priv(dev); |
1367 | int rc; | |
1da177e4 | 1368 | |
2a2cf6b1 | 1369 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1370 | /** |
1371 | * Some sanity checks ... | |
1372 | */ | |
1373 | if (skb == NULL) { | |
1da177e4 LT |
1374 | IUCV_DBF_TEXT(data, 2, "netiucv_tx: skb is NULL\n"); |
1375 | privptr->stats.tx_dropped++; | |
ec634fe3 | 1376 | return NETDEV_TX_OK; |
1da177e4 LT |
1377 | } |
1378 | if (skb_headroom(skb) < NETIUCV_HDRLEN) { | |
1da177e4 LT |
1379 | IUCV_DBF_TEXT(data, 2, |
1380 | "netiucv_tx: skb_headroom < NETIUCV_HDRLEN\n"); | |
1381 | dev_kfree_skb(skb); | |
1382 | privptr->stats.tx_dropped++; | |
ec634fe3 | 1383 | return NETDEV_TX_OK; |
1da177e4 LT |
1384 | } |
1385 | ||
1386 | /** | |
1387 | * If connection is not running, try to restart it | |
e82b0f2c | 1388 | * and throw away packet. |
1da177e4 LT |
1389 | */ |
1390 | if (fsm_getstate(privptr->fsm) != DEV_STATE_RUNNING) { | |
1da177e4 LT |
1391 | dev_kfree_skb(skb); |
1392 | privptr->stats.tx_dropped++; | |
1393 | privptr->stats.tx_errors++; | |
1394 | privptr->stats.tx_carrier_errors++; | |
ec634fe3 | 1395 | return NETDEV_TX_OK; |
1da177e4 LT |
1396 | } |
1397 | ||
1398 | if (netiucv_test_and_set_busy(dev)) { | |
1399 | IUCV_DBF_TEXT(data, 2, "EBUSY from netiucv_tx\n"); | |
4e584d66 | 1400 | return NETDEV_TX_BUSY; |
1da177e4 LT |
1401 | } |
1402 | dev->trans_start = jiffies; | |
5b548140 | 1403 | rc = netiucv_transmit_skb(privptr->conn, skb); |
1da177e4 | 1404 | netiucv_clear_busy(dev); |
5b548140 | 1405 | return rc ? NETDEV_TX_BUSY : NETDEV_TX_OK; |
1da177e4 LT |
1406 | } |
1407 | ||
1408 | /** | |
eebce385 MS |
1409 | * netiucv_stats |
1410 | * @dev: Pointer to interface struct. | |
1da177e4 | 1411 | * |
eebce385 | 1412 | * Returns interface statistics of a device. |
1da177e4 | 1413 | * |
eebce385 | 1414 | * Returns pointer to stats struct of this interface. |
1da177e4 | 1415 | */ |
eebce385 | 1416 | static struct net_device_stats *netiucv_stats (struct net_device * dev) |
1da177e4 | 1417 | { |
eebce385 MS |
1418 | struct netiucv_priv *priv = netdev_priv(dev); |
1419 | ||
2a2cf6b1 | 1420 | IUCV_DBF_TEXT(trace, 5, __func__); |
eebce385 | 1421 | return &priv->stats; |
1da177e4 LT |
1422 | } |
1423 | ||
1424 | /** | |
eebce385 MS |
1425 | * netiucv_change_mtu |
1426 | * @dev: Pointer to interface struct. | |
1427 | * @new_mtu: The new MTU to use for this interface. | |
1da177e4 | 1428 | * |
eebce385 | 1429 | * Sets MTU of an interface. |
1da177e4 | 1430 | * |
eebce385 | 1431 | * Returns 0 on success, -EINVAL if MTU is out of valid range. |
1da177e4 LT |
1432 | * (valid range is 576 .. NETIUCV_MTU_MAX). |
1433 | */ | |
eebce385 | 1434 | static int netiucv_change_mtu(struct net_device * dev, int new_mtu) |
1da177e4 | 1435 | { |
2a2cf6b1 | 1436 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 | 1437 | if (new_mtu < 576 || new_mtu > NETIUCV_MTU_MAX) { |
1da177e4 LT |
1438 | IUCV_DBF_TEXT(setup, 2, "given MTU out of valid range\n"); |
1439 | return -EINVAL; | |
1440 | } | |
1441 | dev->mtu = new_mtu; | |
1442 | return 0; | |
1443 | } | |
1444 | ||
eebce385 | 1445 | /* |
1da177e4 | 1446 | * attributes in sysfs |
eebce385 | 1447 | */ |
1da177e4 | 1448 | |
eebce385 MS |
1449 | static ssize_t user_show(struct device *dev, struct device_attribute *attr, |
1450 | char *buf) | |
1da177e4 | 1451 | { |
dff59b64 | 1452 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1453 | |
2a2cf6b1 | 1454 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1455 | return sprintf(buf, "%s\n", netiucv_printname(priv->conn->userid)); |
1456 | } | |
1457 | ||
eebce385 MS |
1458 | static ssize_t user_write(struct device *dev, struct device_attribute *attr, |
1459 | const char *buf, size_t count) | |
1da177e4 | 1460 | { |
dff59b64 | 1461 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 LT |
1462 | struct net_device *ndev = priv->conn->netdev; |
1463 | char *p; | |
1464 | char *tmp; | |
16a83b30 | 1465 | char username[9]; |
1da177e4 | 1466 | int i; |
eebce385 | 1467 | struct iucv_connection *cp; |
1da177e4 | 1468 | |
2a2cf6b1 | 1469 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 | 1470 | if (count > 9) { |
1da177e4 | 1471 | IUCV_DBF_TEXT_(setup, 2, |
eebce385 | 1472 | "%d is length of username\n", (int) count); |
1da177e4 LT |
1473 | return -EINVAL; |
1474 | } | |
1475 | ||
1476 | tmp = strsep((char **) &buf, "\n"); | |
eebce385 MS |
1477 | for (i = 0, p = tmp; i < 8 && *p; i++, p++) { |
1478 | if (isalnum(*p) || (*p == '$')) { | |
16a83b30 | 1479 | username[i]= toupper(*p); |
eebce385 MS |
1480 | continue; |
1481 | } | |
1482 | if (*p == '\n') { | |
1da177e4 LT |
1483 | /* trailing lf, grr */ |
1484 | break; | |
1da177e4 | 1485 | } |
eebce385 MS |
1486 | IUCV_DBF_TEXT_(setup, 2, |
1487 | "username: invalid character %c\n", *p); | |
1488 | return -EINVAL; | |
1da177e4 | 1489 | } |
eebce385 | 1490 | while (i < 8) |
1da177e4 | 1491 | username[i++] = ' '; |
16a83b30 | 1492 | username[8] = '\0'; |
1da177e4 | 1493 | |
eebce385 MS |
1494 | if (memcmp(username, priv->conn->userid, 9) && |
1495 | (ndev->flags & (IFF_UP | IFF_RUNNING))) { | |
1496 | /* username changed while the interface is active. */ | |
eebce385 | 1497 | IUCV_DBF_TEXT(setup, 2, "user_write: device active\n"); |
f082bcae | 1498 | return -EPERM; |
eebce385 MS |
1499 | } |
1500 | read_lock_bh(&iucv_connection_rwlock); | |
1501 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
1502 | if (!strncmp(username, cp->userid, 9) && cp->netdev != ndev) { | |
1503 | read_unlock_bh(&iucv_connection_rwlock); | |
f082bcae UB |
1504 | IUCV_DBF_TEXT_(setup, 2, "user_write: Connection " |
1505 | "to %s already exists\n", username); | |
eebce385 | 1506 | return -EEXIST; |
1da177e4 LT |
1507 | } |
1508 | } | |
eebce385 | 1509 | read_unlock_bh(&iucv_connection_rwlock); |
1da177e4 | 1510 | memcpy(priv->conn->userid, username, 9); |
1da177e4 | 1511 | return count; |
1da177e4 LT |
1512 | } |
1513 | ||
1514 | static DEVICE_ATTR(user, 0644, user_show, user_write); | |
1515 | ||
eebce385 MS |
1516 | static ssize_t buffer_show (struct device *dev, struct device_attribute *attr, |
1517 | char *buf) | |
dff59b64 GKH |
1518 | { |
1519 | struct netiucv_priv *priv = dev_get_drvdata(dev); | |
1da177e4 | 1520 | |
2a2cf6b1 | 1521 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1522 | return sprintf(buf, "%d\n", priv->conn->max_buffsize); |
1523 | } | |
1524 | ||
eebce385 MS |
1525 | static ssize_t buffer_write (struct device *dev, struct device_attribute *attr, |
1526 | const char *buf, size_t count) | |
1da177e4 | 1527 | { |
dff59b64 | 1528 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 LT |
1529 | struct net_device *ndev = priv->conn->netdev; |
1530 | char *e; | |
1531 | int bs1; | |
1532 | ||
2a2cf6b1 | 1533 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1534 | if (count >= 39) |
1535 | return -EINVAL; | |
1536 | ||
1537 | bs1 = simple_strtoul(buf, &e, 0); | |
1538 | ||
1539 | if (e && (!isspace(*e))) { | |
1da177e4 LT |
1540 | IUCV_DBF_TEXT_(setup, 2, "buffer_write: invalid char %c\n", *e); |
1541 | return -EINVAL; | |
1542 | } | |
1543 | if (bs1 > NETIUCV_BUFSIZE_MAX) { | |
1da177e4 LT |
1544 | IUCV_DBF_TEXT_(setup, 2, |
1545 | "buffer_write: buffer size %d too large\n", | |
1546 | bs1); | |
1547 | return -EINVAL; | |
1548 | } | |
1549 | if ((ndev->flags & IFF_RUNNING) && | |
1550 | (bs1 < (ndev->mtu + NETIUCV_HDRLEN + 2))) { | |
1da177e4 LT |
1551 | IUCV_DBF_TEXT_(setup, 2, |
1552 | "buffer_write: buffer size %d too small\n", | |
1553 | bs1); | |
1554 | return -EINVAL; | |
1555 | } | |
1556 | if (bs1 < (576 + NETIUCV_HDRLEN + NETIUCV_HDRLEN)) { | |
1da177e4 LT |
1557 | IUCV_DBF_TEXT_(setup, 2, |
1558 | "buffer_write: buffer size %d too small\n", | |
1559 | bs1); | |
1560 | return -EINVAL; | |
1561 | } | |
1562 | ||
1563 | priv->conn->max_buffsize = bs1; | |
1564 | if (!(ndev->flags & IFF_RUNNING)) | |
1565 | ndev->mtu = bs1 - NETIUCV_HDRLEN - NETIUCV_HDRLEN; | |
1566 | ||
1567 | return count; | |
1568 | ||
1569 | } | |
1570 | ||
1571 | static DEVICE_ATTR(buffer, 0644, buffer_show, buffer_write); | |
1572 | ||
eebce385 MS |
1573 | static ssize_t dev_fsm_show (struct device *dev, struct device_attribute *attr, |
1574 | char *buf) | |
1da177e4 | 1575 | { |
dff59b64 | 1576 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1577 | |
2a2cf6b1 | 1578 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1579 | return sprintf(buf, "%s\n", fsm_getstate_str(priv->fsm)); |
1580 | } | |
1581 | ||
1582 | static DEVICE_ATTR(device_fsm_state, 0444, dev_fsm_show, NULL); | |
1583 | ||
eebce385 MS |
1584 | static ssize_t conn_fsm_show (struct device *dev, |
1585 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1586 | { |
dff59b64 | 1587 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1588 | |
2a2cf6b1 | 1589 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1590 | return sprintf(buf, "%s\n", fsm_getstate_str(priv->conn->fsm)); |
1591 | } | |
1592 | ||
1593 | static DEVICE_ATTR(connection_fsm_state, 0444, conn_fsm_show, NULL); | |
1594 | ||
eebce385 MS |
1595 | static ssize_t maxmulti_show (struct device *dev, |
1596 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1597 | { |
dff59b64 | 1598 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1599 | |
2a2cf6b1 | 1600 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1601 | return sprintf(buf, "%ld\n", priv->conn->prof.maxmulti); |
1602 | } | |
1603 | ||
eebce385 MS |
1604 | static ssize_t maxmulti_write (struct device *dev, |
1605 | struct device_attribute *attr, | |
1606 | const char *buf, size_t count) | |
1da177e4 | 1607 | { |
dff59b64 | 1608 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1609 | |
2a2cf6b1 | 1610 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1611 | priv->conn->prof.maxmulti = 0; |
1612 | return count; | |
1613 | } | |
1614 | ||
1615 | static DEVICE_ATTR(max_tx_buffer_used, 0644, maxmulti_show, maxmulti_write); | |
1616 | ||
eebce385 MS |
1617 | static ssize_t maxcq_show (struct device *dev, struct device_attribute *attr, |
1618 | char *buf) | |
1da177e4 | 1619 | { |
dff59b64 | 1620 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1621 | |
2a2cf6b1 | 1622 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1623 | return sprintf(buf, "%ld\n", priv->conn->prof.maxcqueue); |
1624 | } | |
1625 | ||
eebce385 MS |
1626 | static ssize_t maxcq_write (struct device *dev, struct device_attribute *attr, |
1627 | const char *buf, size_t count) | |
1da177e4 | 1628 | { |
dff59b64 | 1629 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
e82b0f2c | 1630 | |
2a2cf6b1 | 1631 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1632 | priv->conn->prof.maxcqueue = 0; |
1633 | return count; | |
1634 | } | |
1635 | ||
1636 | static DEVICE_ATTR(max_chained_skbs, 0644, maxcq_show, maxcq_write); | |
1637 | ||
eebce385 MS |
1638 | static ssize_t sdoio_show (struct device *dev, struct device_attribute *attr, |
1639 | char *buf) | |
1da177e4 | 1640 | { |
dff59b64 | 1641 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1642 | |
2a2cf6b1 | 1643 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1644 | return sprintf(buf, "%ld\n", priv->conn->prof.doios_single); |
1645 | } | |
1646 | ||
eebce385 MS |
1647 | static ssize_t sdoio_write (struct device *dev, struct device_attribute *attr, |
1648 | const char *buf, size_t count) | |
1da177e4 | 1649 | { |
dff59b64 | 1650 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
e82b0f2c | 1651 | |
2a2cf6b1 | 1652 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1653 | priv->conn->prof.doios_single = 0; |
1654 | return count; | |
1655 | } | |
1656 | ||
1657 | static DEVICE_ATTR(tx_single_write_ops, 0644, sdoio_show, sdoio_write); | |
1658 | ||
eebce385 MS |
1659 | static ssize_t mdoio_show (struct device *dev, struct device_attribute *attr, |
1660 | char *buf) | |
1da177e4 | 1661 | { |
dff59b64 | 1662 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1663 | |
2a2cf6b1 | 1664 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1665 | return sprintf(buf, "%ld\n", priv->conn->prof.doios_multi); |
1666 | } | |
1667 | ||
eebce385 MS |
1668 | static ssize_t mdoio_write (struct device *dev, struct device_attribute *attr, |
1669 | const char *buf, size_t count) | |
1da177e4 | 1670 | { |
dff59b64 | 1671 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
e82b0f2c | 1672 | |
2a2cf6b1 | 1673 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1674 | priv->conn->prof.doios_multi = 0; |
1675 | return count; | |
1676 | } | |
1677 | ||
1678 | static DEVICE_ATTR(tx_multi_write_ops, 0644, mdoio_show, mdoio_write); | |
1679 | ||
eebce385 MS |
1680 | static ssize_t txlen_show (struct device *dev, struct device_attribute *attr, |
1681 | char *buf) | |
1da177e4 | 1682 | { |
dff59b64 | 1683 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1684 | |
2a2cf6b1 | 1685 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1686 | return sprintf(buf, "%ld\n", priv->conn->prof.txlen); |
1687 | } | |
1688 | ||
eebce385 MS |
1689 | static ssize_t txlen_write (struct device *dev, struct device_attribute *attr, |
1690 | const char *buf, size_t count) | |
1da177e4 | 1691 | { |
dff59b64 | 1692 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
e82b0f2c | 1693 | |
2a2cf6b1 | 1694 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1695 | priv->conn->prof.txlen = 0; |
1696 | return count; | |
1697 | } | |
1698 | ||
1699 | static DEVICE_ATTR(netto_bytes, 0644, txlen_show, txlen_write); | |
1700 | ||
eebce385 MS |
1701 | static ssize_t txtime_show (struct device *dev, struct device_attribute *attr, |
1702 | char *buf) | |
1da177e4 | 1703 | { |
dff59b64 | 1704 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1705 | |
2a2cf6b1 | 1706 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1707 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_time); |
1708 | } | |
1709 | ||
eebce385 MS |
1710 | static ssize_t txtime_write (struct device *dev, struct device_attribute *attr, |
1711 | const char *buf, size_t count) | |
1da177e4 | 1712 | { |
dff59b64 | 1713 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
e82b0f2c | 1714 | |
2a2cf6b1 | 1715 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1716 | priv->conn->prof.tx_time = 0; |
1717 | return count; | |
1718 | } | |
1719 | ||
1720 | static DEVICE_ATTR(max_tx_io_time, 0644, txtime_show, txtime_write); | |
1721 | ||
eebce385 MS |
1722 | static ssize_t txpend_show (struct device *dev, struct device_attribute *attr, |
1723 | char *buf) | |
1da177e4 | 1724 | { |
dff59b64 | 1725 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1726 | |
2a2cf6b1 | 1727 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1728 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_pending); |
1729 | } | |
1730 | ||
eebce385 MS |
1731 | static ssize_t txpend_write (struct device *dev, struct device_attribute *attr, |
1732 | const char *buf, size_t count) | |
1da177e4 | 1733 | { |
dff59b64 | 1734 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1735 | |
2a2cf6b1 | 1736 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1737 | priv->conn->prof.tx_pending = 0; |
1738 | return count; | |
1739 | } | |
1740 | ||
1741 | static DEVICE_ATTR(tx_pending, 0644, txpend_show, txpend_write); | |
1742 | ||
eebce385 MS |
1743 | static ssize_t txmpnd_show (struct device *dev, struct device_attribute *attr, |
1744 | char *buf) | |
1da177e4 | 1745 | { |
dff59b64 | 1746 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1747 | |
2a2cf6b1 | 1748 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1749 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_max_pending); |
1750 | } | |
1751 | ||
eebce385 MS |
1752 | static ssize_t txmpnd_write (struct device *dev, struct device_attribute *attr, |
1753 | const char *buf, size_t count) | |
1da177e4 | 1754 | { |
dff59b64 | 1755 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1756 | |
2a2cf6b1 | 1757 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1758 | priv->conn->prof.tx_max_pending = 0; |
1759 | return count; | |
1760 | } | |
1761 | ||
1762 | static DEVICE_ATTR(tx_max_pending, 0644, txmpnd_show, txmpnd_write); | |
1763 | ||
1764 | static struct attribute *netiucv_attrs[] = { | |
1765 | &dev_attr_buffer.attr, | |
1766 | &dev_attr_user.attr, | |
1767 | NULL, | |
1768 | }; | |
1769 | ||
1770 | static struct attribute_group netiucv_attr_group = { | |
1771 | .attrs = netiucv_attrs, | |
1772 | }; | |
1773 | ||
1774 | static struct attribute *netiucv_stat_attrs[] = { | |
1775 | &dev_attr_device_fsm_state.attr, | |
1776 | &dev_attr_connection_fsm_state.attr, | |
1777 | &dev_attr_max_tx_buffer_used.attr, | |
1778 | &dev_attr_max_chained_skbs.attr, | |
1779 | &dev_attr_tx_single_write_ops.attr, | |
1780 | &dev_attr_tx_multi_write_ops.attr, | |
1781 | &dev_attr_netto_bytes.attr, | |
1782 | &dev_attr_max_tx_io_time.attr, | |
1783 | &dev_attr_tx_pending.attr, | |
1784 | &dev_attr_tx_max_pending.attr, | |
1785 | NULL, | |
1786 | }; | |
1787 | ||
1788 | static struct attribute_group netiucv_stat_attr_group = { | |
1789 | .name = "stats", | |
1790 | .attrs = netiucv_stat_attrs, | |
1791 | }; | |
1792 | ||
d4614627 | 1793 | static int netiucv_add_files(struct device *dev) |
1da177e4 LT |
1794 | { |
1795 | int ret; | |
1796 | ||
2a2cf6b1 | 1797 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1798 | ret = sysfs_create_group(&dev->kobj, &netiucv_attr_group); |
1799 | if (ret) | |
1800 | return ret; | |
1801 | ret = sysfs_create_group(&dev->kobj, &netiucv_stat_attr_group); | |
1802 | if (ret) | |
1803 | sysfs_remove_group(&dev->kobj, &netiucv_attr_group); | |
1804 | return ret; | |
1805 | } | |
1806 | ||
d4614627 | 1807 | static void netiucv_remove_files(struct device *dev) |
1da177e4 | 1808 | { |
2a2cf6b1 | 1809 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1810 | sysfs_remove_group(&dev->kobj, &netiucv_stat_attr_group); |
1811 | sysfs_remove_group(&dev->kobj, &netiucv_attr_group); | |
1812 | } | |
1813 | ||
eebce385 | 1814 | static int netiucv_register_device(struct net_device *ndev) |
1da177e4 | 1815 | { |
eebce385 | 1816 | struct netiucv_priv *priv = netdev_priv(ndev); |
88abaab4 | 1817 | struct device *dev = kzalloc(sizeof(struct device), GFP_KERNEL); |
1da177e4 LT |
1818 | int ret; |
1819 | ||
2a2cf6b1 | 1820 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1821 | |
1822 | if (dev) { | |
1bf5b285 | 1823 | dev_set_name(dev, "net%s", ndev->name); |
1da177e4 LT |
1824 | dev->bus = &iucv_bus; |
1825 | dev->parent = iucv_root; | |
1826 | /* | |
1827 | * The release function could be called after the | |
1828 | * module has been unloaded. It's _only_ task is to | |
1829 | * free the struct. Therefore, we specify kfree() | |
1830 | * directly here. (Probably a little bit obfuscating | |
1831 | * but legitime ...). | |
1832 | */ | |
1833 | dev->release = (void (*)(struct device *))kfree; | |
1834 | dev->driver = &netiucv_driver; | |
1835 | } else | |
1836 | return -ENOMEM; | |
1837 | ||
1838 | ret = device_register(dev); | |
c6304933 SO |
1839 | if (ret) { |
1840 | put_device(dev); | |
1da177e4 | 1841 | return ret; |
c6304933 | 1842 | } |
1da177e4 LT |
1843 | ret = netiucv_add_files(dev); |
1844 | if (ret) | |
1845 | goto out_unreg; | |
1846 | priv->dev = dev; | |
dff59b64 | 1847 | dev_set_drvdata(dev, priv); |
1da177e4 LT |
1848 | return 0; |
1849 | ||
1850 | out_unreg: | |
1851 | device_unregister(dev); | |
1852 | return ret; | |
1853 | } | |
1854 | ||
eebce385 | 1855 | static void netiucv_unregister_device(struct device *dev) |
1da177e4 | 1856 | { |
2a2cf6b1 | 1857 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1858 | netiucv_remove_files(dev); |
1859 | device_unregister(dev); | |
1860 | } | |
1861 | ||
1862 | /** | |
1863 | * Allocate and initialize a new connection structure. | |
1864 | * Add it to the list of netiucv connections; | |
1865 | */ | |
eebce385 MS |
1866 | static struct iucv_connection *netiucv_new_connection(struct net_device *dev, |
1867 | char *username) | |
1868 | { | |
1869 | struct iucv_connection *conn; | |
1da177e4 | 1870 | |
eebce385 MS |
1871 | conn = kzalloc(sizeof(*conn), GFP_KERNEL); |
1872 | if (!conn) | |
1873 | goto out; | |
1874 | skb_queue_head_init(&conn->collect_queue); | |
1875 | skb_queue_head_init(&conn->commit_queue); | |
1876 | spin_lock_init(&conn->collect_lock); | |
1877 | conn->max_buffsize = NETIUCV_BUFSIZE_DEFAULT; | |
1878 | conn->netdev = dev; | |
1879 | ||
1880 | conn->rx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA); | |
1881 | if (!conn->rx_buff) | |
1882 | goto out_conn; | |
1883 | conn->tx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA); | |
1884 | if (!conn->tx_buff) | |
1885 | goto out_rx; | |
1886 | conn->fsm = init_fsm("netiucvconn", conn_state_names, | |
1887 | conn_event_names, NR_CONN_STATES, | |
1888 | NR_CONN_EVENTS, conn_fsm, CONN_FSM_LEN, | |
1889 | GFP_KERNEL); | |
1890 | if (!conn->fsm) | |
1891 | goto out_tx; | |
1892 | ||
1893 | fsm_settimer(conn->fsm, &conn->timer); | |
1894 | fsm_newstate(conn->fsm, CONN_STATE_INVALID); | |
1895 | ||
1896 | if (username) { | |
1897 | memcpy(conn->userid, username, 9); | |
1898 | fsm_newstate(conn->fsm, CONN_STATE_STOPPED); | |
1da177e4 | 1899 | } |
eebce385 MS |
1900 | |
1901 | write_lock_bh(&iucv_connection_rwlock); | |
1902 | list_add_tail(&conn->list, &iucv_connection_list); | |
1903 | write_unlock_bh(&iucv_connection_rwlock); | |
1da177e4 | 1904 | return conn; |
eebce385 MS |
1905 | |
1906 | out_tx: | |
1907 | kfree_skb(conn->tx_buff); | |
1908 | out_rx: | |
1909 | kfree_skb(conn->rx_buff); | |
1910 | out_conn: | |
1911 | kfree(conn); | |
1912 | out: | |
1913 | return NULL; | |
1da177e4 LT |
1914 | } |
1915 | ||
1916 | /** | |
1917 | * Release a connection structure and remove it from the | |
1918 | * list of netiucv connections. | |
1919 | */ | |
eebce385 | 1920 | static void netiucv_remove_connection(struct iucv_connection *conn) |
1da177e4 | 1921 | { |
2a2cf6b1 | 1922 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 MS |
1923 | write_lock_bh(&iucv_connection_rwlock); |
1924 | list_del_init(&conn->list); | |
1925 | write_unlock_bh(&iucv_connection_rwlock); | |
0be4acec UB |
1926 | fsm_deltimer(&conn->timer); |
1927 | netiucv_purge_skb_queue(&conn->collect_queue); | |
eebce385 MS |
1928 | if (conn->path) { |
1929 | iucv_path_sever(conn->path, iucvMagic); | |
1930 | kfree(conn->path); | |
1931 | conn->path = NULL; | |
1da177e4 | 1932 | } |
0be4acec | 1933 | netiucv_purge_skb_queue(&conn->commit_queue); |
eebce385 MS |
1934 | kfree_fsm(conn->fsm); |
1935 | kfree_skb(conn->rx_buff); | |
1936 | kfree_skb(conn->tx_buff); | |
1da177e4 LT |
1937 | } |
1938 | ||
1939 | /** | |
1940 | * Release everything of a net device. | |
1941 | */ | |
eebce385 | 1942 | static void netiucv_free_netdevice(struct net_device *dev) |
1da177e4 | 1943 | { |
eebce385 | 1944 | struct netiucv_priv *privptr = netdev_priv(dev); |
1da177e4 | 1945 | |
2a2cf6b1 | 1946 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1947 | |
1948 | if (!dev) | |
1949 | return; | |
1950 | ||
1da177e4 LT |
1951 | if (privptr) { |
1952 | if (privptr->conn) | |
1953 | netiucv_remove_connection(privptr->conn); | |
1954 | if (privptr->fsm) | |
1955 | kfree_fsm(privptr->fsm); | |
1956 | privptr->conn = NULL; privptr->fsm = NULL; | |
1957 | /* privptr gets freed by free_netdev() */ | |
1958 | } | |
1959 | free_netdev(dev); | |
1960 | } | |
1961 | ||
1962 | /** | |
1963 | * Initialize a net device. (Called from kernel in alloc_netdev()) | |
1964 | */ | |
4edd73b5 FB |
1965 | static const struct net_device_ops netiucv_netdev_ops = { |
1966 | .ndo_open = netiucv_open, | |
1967 | .ndo_stop = netiucv_close, | |
1968 | .ndo_get_stats = netiucv_stats, | |
1969 | .ndo_start_xmit = netiucv_tx, | |
1970 | .ndo_change_mtu = netiucv_change_mtu, | |
1971 | }; | |
1972 | ||
eebce385 | 1973 | static void netiucv_setup_netdevice(struct net_device *dev) |
1da177e4 | 1974 | { |
1da177e4 | 1975 | dev->mtu = NETIUCV_MTU_DEFAULT; |
1da177e4 LT |
1976 | dev->destructor = netiucv_free_netdevice; |
1977 | dev->hard_header_len = NETIUCV_HDRLEN; | |
1978 | dev->addr_len = 0; | |
1979 | dev->type = ARPHRD_SLIP; | |
1980 | dev->tx_queue_len = NETIUCV_QUEUELEN_DEFAULT; | |
1981 | dev->flags = IFF_POINTOPOINT | IFF_NOARP; | |
4edd73b5 | 1982 | dev->netdev_ops = &netiucv_netdev_ops; |
1da177e4 LT |
1983 | } |
1984 | ||
1985 | /** | |
1986 | * Allocate and initialize everything of a net device. | |
1987 | */ | |
eebce385 | 1988 | static struct net_device *netiucv_init_netdevice(char *username) |
1da177e4 LT |
1989 | { |
1990 | struct netiucv_priv *privptr; | |
1991 | struct net_device *dev; | |
1992 | ||
1993 | dev = alloc_netdev(sizeof(struct netiucv_priv), "iucv%d", | |
1994 | netiucv_setup_netdevice); | |
1995 | if (!dev) | |
1996 | return NULL; | |
eebce385 MS |
1997 | if (dev_alloc_name(dev, dev->name) < 0) |
1998 | goto out_netdev; | |
1da177e4 | 1999 | |
eebce385 | 2000 | privptr = netdev_priv(dev); |
1da177e4 LT |
2001 | privptr->fsm = init_fsm("netiucvdev", dev_state_names, |
2002 | dev_event_names, NR_DEV_STATES, NR_DEV_EVENTS, | |
2003 | dev_fsm, DEV_FSM_LEN, GFP_KERNEL); | |
eebce385 MS |
2004 | if (!privptr->fsm) |
2005 | goto out_netdev; | |
2006 | ||
1da177e4 LT |
2007 | privptr->conn = netiucv_new_connection(dev, username); |
2008 | if (!privptr->conn) { | |
1da177e4 | 2009 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_new_connection\n"); |
eebce385 | 2010 | goto out_fsm; |
1da177e4 LT |
2011 | } |
2012 | fsm_newstate(privptr->fsm, DEV_STATE_STOPPED); | |
1da177e4 | 2013 | return dev; |
eebce385 MS |
2014 | |
2015 | out_fsm: | |
2016 | kfree_fsm(privptr->fsm); | |
2017 | out_netdev: | |
2018 | free_netdev(dev); | |
2019 | return NULL; | |
1da177e4 LT |
2020 | } |
2021 | ||
eebce385 MS |
2022 | static ssize_t conn_write(struct device_driver *drv, |
2023 | const char *buf, size_t count) | |
1da177e4 | 2024 | { |
eebce385 | 2025 | const char *p; |
16a83b30 | 2026 | char username[9]; |
eebce385 | 2027 | int i, rc; |
1da177e4 | 2028 | struct net_device *dev; |
eebce385 MS |
2029 | struct netiucv_priv *priv; |
2030 | struct iucv_connection *cp; | |
1da177e4 | 2031 | |
2a2cf6b1 | 2032 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 2033 | if (count>9) { |
1da177e4 LT |
2034 | IUCV_DBF_TEXT(setup, 2, "conn_write: too long\n"); |
2035 | return -EINVAL; | |
2036 | } | |
2037 | ||
eebce385 MS |
2038 | for (i = 0, p = buf; i < 8 && *p; i++, p++) { |
2039 | if (isalnum(*p) || *p == '$') { | |
2040 | username[i] = toupper(*p); | |
2041 | continue; | |
2042 | } | |
2043 | if (*p == '\n') | |
1da177e4 LT |
2044 | /* trailing lf, grr */ |
2045 | break; | |
eebce385 MS |
2046 | IUCV_DBF_TEXT_(setup, 2, |
2047 | "conn_write: invalid character %c\n", *p); | |
2048 | return -EINVAL; | |
1da177e4 | 2049 | } |
eebce385 | 2050 | while (i < 8) |
1da177e4 | 2051 | username[i++] = ' '; |
16a83b30 FP |
2052 | username[8] = '\0'; |
2053 | ||
eebce385 MS |
2054 | read_lock_bh(&iucv_connection_rwlock); |
2055 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
2056 | if (!strncmp(username, cp->userid, 9)) { | |
2057 | read_unlock_bh(&iucv_connection_rwlock); | |
f082bcae UB |
2058 | IUCV_DBF_TEXT_(setup, 2, "conn_write: Connection " |
2059 | "to %s already exists\n", username); | |
eebce385 MS |
2060 | return -EEXIST; |
2061 | } | |
16a83b30 | 2062 | } |
eebce385 MS |
2063 | read_unlock_bh(&iucv_connection_rwlock); |
2064 | ||
1da177e4 LT |
2065 | dev = netiucv_init_netdevice(username); |
2066 | if (!dev) { | |
1da177e4 LT |
2067 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_init_netdevice\n"); |
2068 | return -ENODEV; | |
2069 | } | |
2070 | ||
eebce385 MS |
2071 | rc = netiucv_register_device(dev); |
2072 | if (rc) { | |
1da177e4 | 2073 | IUCV_DBF_TEXT_(setup, 2, |
eebce385 | 2074 | "ret %d from netiucv_register_device\n", rc); |
1da177e4 LT |
2075 | goto out_free_ndev; |
2076 | } | |
2077 | ||
2078 | /* sysfs magic */ | |
eebce385 MS |
2079 | priv = netdev_priv(dev); |
2080 | SET_NETDEV_DEV(dev, priv->dev); | |
1da177e4 | 2081 | |
eebce385 MS |
2082 | rc = register_netdev(dev); |
2083 | if (rc) | |
2084 | goto out_unreg; | |
1da177e4 | 2085 | |
8f7c502c UB |
2086 | dev_info(priv->dev, "The IUCV interface to %s has been" |
2087 | " established successfully\n", netiucv_printname(username)); | |
e82b0f2c | 2088 | |
1da177e4 LT |
2089 | return count; |
2090 | ||
eebce385 MS |
2091 | out_unreg: |
2092 | netiucv_unregister_device(priv->dev); | |
1da177e4 | 2093 | out_free_ndev: |
1da177e4 | 2094 | netiucv_free_netdevice(dev); |
eebce385 | 2095 | return rc; |
1da177e4 LT |
2096 | } |
2097 | ||
2b67fc46 | 2098 | static DRIVER_ATTR(connection, 0200, NULL, conn_write); |
1da177e4 | 2099 | |
eebce385 MS |
2100 | static ssize_t remove_write (struct device_driver *drv, |
2101 | const char *buf, size_t count) | |
1da177e4 | 2102 | { |
eebce385 | 2103 | struct iucv_connection *cp; |
1da177e4 LT |
2104 | struct net_device *ndev; |
2105 | struct netiucv_priv *priv; | |
2106 | struct device *dev; | |
2107 | char name[IFNAMSIZ]; | |
eebce385 | 2108 | const char *p; |
1da177e4 LT |
2109 | int i; |
2110 | ||
2a2cf6b1 | 2111 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
2112 | |
2113 | if (count >= IFNAMSIZ) | |
a419aef8 | 2114 | count = IFNAMSIZ - 1; |
1da177e4 | 2115 | |
eebce385 MS |
2116 | for (i = 0, p = buf; i < count && *p; i++, p++) { |
2117 | if (*p == '\n' || *p == ' ') | |
1da177e4 LT |
2118 | /* trailing lf, grr */ |
2119 | break; | |
eebce385 | 2120 | name[i] = *p; |
1da177e4 LT |
2121 | } |
2122 | name[i] = '\0'; | |
2123 | ||
eebce385 MS |
2124 | read_lock_bh(&iucv_connection_rwlock); |
2125 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
2126 | ndev = cp->netdev; | |
2127 | priv = netdev_priv(ndev); | |
1da177e4 | 2128 | dev = priv->dev; |
eebce385 MS |
2129 | if (strncmp(name, ndev->name, count)) |
2130 | continue; | |
2131 | read_unlock_bh(&iucv_connection_rwlock); | |
1da177e4 | 2132 | if (ndev->flags & (IFF_UP | IFF_RUNNING)) { |
8f7c502c UB |
2133 | dev_warn(dev, "The IUCV device is connected" |
2134 | " to %s and cannot be removed\n", | |
2135 | priv->conn->userid); | |
1da177e4 | 2136 | IUCV_DBF_TEXT(data, 2, "remove_write: still active\n"); |
f082bcae | 2137 | return -EPERM; |
1da177e4 LT |
2138 | } |
2139 | unregister_netdev(ndev); | |
2140 | netiucv_unregister_device(dev); | |
2141 | return count; | |
2142 | } | |
eebce385 | 2143 | read_unlock_bh(&iucv_connection_rwlock); |
1da177e4 LT |
2144 | IUCV_DBF_TEXT(data, 2, "remove_write: unknown device\n"); |
2145 | return -EINVAL; | |
2146 | } | |
2147 | ||
2b67fc46 | 2148 | static DRIVER_ATTR(remove, 0200, NULL, remove_write); |
1da177e4 | 2149 | |
eebce385 MS |
2150 | static struct attribute * netiucv_drv_attrs[] = { |
2151 | &driver_attr_connection.attr, | |
2152 | &driver_attr_remove.attr, | |
2153 | NULL, | |
2154 | }; | |
2155 | ||
2156 | static struct attribute_group netiucv_drv_attr_group = { | |
2157 | .attrs = netiucv_drv_attrs, | |
2158 | }; | |
2159 | ||
a4dbd674 | 2160 | static const struct attribute_group *netiucv_drv_attr_groups[] = { |
5b88feb1 CH |
2161 | &netiucv_drv_attr_group, |
2162 | NULL, | |
2163 | }; | |
2164 | ||
eebce385 | 2165 | static void netiucv_banner(void) |
1da177e4 | 2166 | { |
8f7c502c | 2167 | pr_info("driver initialized\n"); |
1da177e4 LT |
2168 | } |
2169 | ||
eebce385 | 2170 | static void __exit netiucv_exit(void) |
1da177e4 | 2171 | { |
eebce385 MS |
2172 | struct iucv_connection *cp; |
2173 | struct net_device *ndev; | |
2174 | struct netiucv_priv *priv; | |
2175 | struct device *dev; | |
2176 | ||
2a2cf6b1 | 2177 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 MS |
2178 | while (!list_empty(&iucv_connection_list)) { |
2179 | cp = list_entry(iucv_connection_list.next, | |
2180 | struct iucv_connection, list); | |
eebce385 MS |
2181 | ndev = cp->netdev; |
2182 | priv = netdev_priv(ndev); | |
2183 | dev = priv->dev; | |
1da177e4 LT |
2184 | |
2185 | unregister_netdev(ndev); | |
2186 | netiucv_unregister_device(dev); | |
2187 | } | |
2188 | ||
1175b257 | 2189 | device_unregister(netiucv_dev); |
1da177e4 | 2190 | driver_unregister(&netiucv_driver); |
eebce385 | 2191 | iucv_unregister(&netiucv_handler, 1); |
1da177e4 LT |
2192 | iucv_unregister_dbf_views(); |
2193 | ||
8f7c502c | 2194 | pr_info("driver unloaded\n"); |
1da177e4 LT |
2195 | return; |
2196 | } | |
2197 | ||
eebce385 | 2198 | static int __init netiucv_init(void) |
1da177e4 | 2199 | { |
eebce385 | 2200 | int rc; |
e82b0f2c | 2201 | |
eebce385 MS |
2202 | rc = iucv_register_dbf_views(); |
2203 | if (rc) | |
2204 | goto out; | |
2205 | rc = iucv_register(&netiucv_handler, 1); | |
2206 | if (rc) | |
2207 | goto out_dbf; | |
2a2cf6b1 | 2208 | IUCV_DBF_TEXT(trace, 3, __func__); |
0a0a8310 | 2209 | netiucv_driver.groups = netiucv_drv_attr_groups; |
eebce385 MS |
2210 | rc = driver_register(&netiucv_driver); |
2211 | if (rc) { | |
eebce385 MS |
2212 | IUCV_DBF_TEXT_(setup, 2, "ret %d from driver_register\n", rc); |
2213 | goto out_iucv; | |
1da177e4 | 2214 | } |
1175b257 UB |
2215 | /* establish dummy device */ |
2216 | netiucv_dev = kzalloc(sizeof(struct device), GFP_KERNEL); | |
2217 | if (!netiucv_dev) { | |
2218 | rc = -ENOMEM; | |
2219 | goto out_driver; | |
2220 | } | |
2221 | dev_set_name(netiucv_dev, "netiucv"); | |
2222 | netiucv_dev->bus = &iucv_bus; | |
2223 | netiucv_dev->parent = iucv_root; | |
2224 | netiucv_dev->release = (void (*)(struct device *))kfree; | |
2225 | netiucv_dev->driver = &netiucv_driver; | |
2226 | rc = device_register(netiucv_dev); | |
c6304933 SO |
2227 | if (rc) { |
2228 | put_device(netiucv_dev); | |
1175b257 | 2229 | goto out_driver; |
c6304933 | 2230 | } |
eebce385 MS |
2231 | netiucv_banner(); |
2232 | return rc; | |
2233 | ||
1175b257 UB |
2234 | out_driver: |
2235 | driver_unregister(&netiucv_driver); | |
eebce385 MS |
2236 | out_iucv: |
2237 | iucv_unregister(&netiucv_handler, 1); | |
2238 | out_dbf: | |
2239 | iucv_unregister_dbf_views(); | |
2240 | out: | |
2241 | return rc; | |
1da177e4 | 2242 | } |
e82b0f2c | 2243 | |
1da177e4 LT |
2244 | module_init(netiucv_init); |
2245 | module_exit(netiucv_exit); | |
2246 | MODULE_LICENSE("GPL"); |