]>
Commit | Line | Data |
---|---|---|
ab9953ff | 1 | // SPDX-License-Identifier: GPL-2.0+ |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * IUCV network driver |
4 | * | |
1175b257 | 5 | * Copyright IBM Corp. 2001, 2009 |
1da177e4 | 6 | * |
1175b257 UB |
7 | * Author(s): |
8 | * Original netiucv driver: | |
9 | * Fritz Elfert (elfert@de.ibm.com, felfert@millenux.com) | |
10 | * Sysfs integration and all bugs therein: | |
11 | * Cornelia Huck (cornelia.huck@de.ibm.com) | |
12 | * PM functions: | |
13 | * Ursula Braun (ursula.braun@de.ibm.com) | |
1da177e4 LT |
14 | * |
15 | * Documentation used: | |
16 | * the source of the original IUCV driver by: | |
17 | * Stefan Hegewald <hegewald@de.ibm.com> | |
18 | * Hartmut Penner <hpenner@de.ibm.com> | |
19 | * Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) | |
20 | * Martin Schwidefsky (schwidefsky@de.ibm.com) | |
21 | * Alan Altmark (Alan_Altmark@us.ibm.com) Sept. 2000 | |
1da177e4 | 22 | */ |
e82b0f2c | 23 | |
8f7c502c UB |
24 | #define KMSG_COMPONENT "netiucv" |
25 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
26 | ||
1da177e4 LT |
27 | #undef DEBUG |
28 | ||
29 | #include <linux/module.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/kernel.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/errno.h> | |
34 | #include <linux/types.h> | |
35 | #include <linux/interrupt.h> | |
36 | #include <linux/timer.h> | |
1da177e4 LT |
37 | #include <linux/bitops.h> |
38 | ||
39 | #include <linux/signal.h> | |
40 | #include <linux/string.h> | |
41 | #include <linux/device.h> | |
42 | ||
43 | #include <linux/ip.h> | |
44 | #include <linux/if_arp.h> | |
45 | #include <linux/tcp.h> | |
46 | #include <linux/skbuff.h> | |
47 | #include <linux/ctype.h> | |
48 | #include <net/dst.h> | |
49 | ||
50 | #include <asm/io.h> | |
7c0f6ba6 | 51 | #include <linux/uaccess.h> |
08e3356c | 52 | #include <asm/ebcdic.h> |
1da177e4 | 53 | |
eebce385 | 54 | #include <net/iucv/iucv.h> |
1da177e4 LT |
55 | #include "fsm.h" |
56 | ||
57 | MODULE_AUTHOR | |
58 | ("(C) 2001 IBM Corporation by Fritz Elfert (felfert@millenux.com)"); | |
59 | MODULE_DESCRIPTION ("Linux for S/390 IUCV network driver"); | |
60 | ||
eebce385 MS |
61 | /** |
62 | * Debug Facility stuff | |
63 | */ | |
64 | #define IUCV_DBF_SETUP_NAME "iucv_setup" | |
08e3356c | 65 | #define IUCV_DBF_SETUP_LEN 64 |
eebce385 MS |
66 | #define IUCV_DBF_SETUP_PAGES 2 |
67 | #define IUCV_DBF_SETUP_NR_AREAS 1 | |
68 | #define IUCV_DBF_SETUP_LEVEL 3 | |
69 | ||
70 | #define IUCV_DBF_DATA_NAME "iucv_data" | |
71 | #define IUCV_DBF_DATA_LEN 128 | |
72 | #define IUCV_DBF_DATA_PAGES 2 | |
73 | #define IUCV_DBF_DATA_NR_AREAS 1 | |
74 | #define IUCV_DBF_DATA_LEVEL 2 | |
75 | ||
76 | #define IUCV_DBF_TRACE_NAME "iucv_trace" | |
77 | #define IUCV_DBF_TRACE_LEN 16 | |
78 | #define IUCV_DBF_TRACE_PAGES 4 | |
79 | #define IUCV_DBF_TRACE_NR_AREAS 1 | |
80 | #define IUCV_DBF_TRACE_LEVEL 3 | |
81 | ||
82 | #define IUCV_DBF_TEXT(name,level,text) \ | |
83 | do { \ | |
84 | debug_text_event(iucv_dbf_##name,level,text); \ | |
85 | } while (0) | |
86 | ||
87 | #define IUCV_DBF_HEX(name,level,addr,len) \ | |
88 | do { \ | |
89 | debug_event(iucv_dbf_##name,level,(void*)(addr),len); \ | |
90 | } while (0) | |
91 | ||
92 | DECLARE_PER_CPU(char[256], iucv_dbf_txt_buf); | |
93 | ||
f33780d3 PT |
94 | #define IUCV_DBF_TEXT_(name, level, text...) \ |
95 | do { \ | |
8e6a8285 | 96 | if (debug_level_enabled(iucv_dbf_##name, level)) { \ |
390dfd95 TH |
97 | char* __buf = get_cpu_var(iucv_dbf_txt_buf); \ |
98 | sprintf(__buf, text); \ | |
99 | debug_text_event(iucv_dbf_##name, level, __buf); \ | |
f33780d3 PT |
100 | put_cpu_var(iucv_dbf_txt_buf); \ |
101 | } \ | |
eebce385 MS |
102 | } while (0) |
103 | ||
104 | #define IUCV_DBF_SPRINTF(name,level,text...) \ | |
105 | do { \ | |
106 | debug_sprintf_event(iucv_dbf_trace, level, ##text ); \ | |
107 | debug_sprintf_event(iucv_dbf_trace, level, text ); \ | |
108 | } while (0) | |
109 | ||
110 | /** | |
111 | * some more debug stuff | |
112 | */ | |
1da177e4 LT |
113 | #define PRINTK_HEADER " iucv: " /* for debugging */ |
114 | ||
1175b257 UB |
115 | /* dummy device to make sure netiucv_pm functions are called */ |
116 | static struct device *netiucv_dev; | |
117 | ||
118 | static int netiucv_pm_prepare(struct device *); | |
119 | static void netiucv_pm_complete(struct device *); | |
120 | static int netiucv_pm_freeze(struct device *); | |
121 | static int netiucv_pm_restore_thaw(struct device *); | |
122 | ||
47145210 | 123 | static const struct dev_pm_ops netiucv_pm_ops = { |
1175b257 UB |
124 | .prepare = netiucv_pm_prepare, |
125 | .complete = netiucv_pm_complete, | |
126 | .freeze = netiucv_pm_freeze, | |
127 | .thaw = netiucv_pm_restore_thaw, | |
128 | .restore = netiucv_pm_restore_thaw, | |
129 | }; | |
130 | ||
1da177e4 | 131 | static struct device_driver netiucv_driver = { |
2219510f | 132 | .owner = THIS_MODULE, |
1da177e4 LT |
133 | .name = "netiucv", |
134 | .bus = &iucv_bus, | |
1175b257 | 135 | .pm = &netiucv_pm_ops, |
1da177e4 LT |
136 | }; |
137 | ||
91e60eb6 UB |
138 | static int netiucv_callback_connreq(struct iucv_path *, u8 *, u8 *); |
139 | static void netiucv_callback_connack(struct iucv_path *, u8 *); | |
140 | static void netiucv_callback_connrej(struct iucv_path *, u8 *); | |
141 | static void netiucv_callback_connsusp(struct iucv_path *, u8 *); | |
142 | static void netiucv_callback_connres(struct iucv_path *, u8 *); | |
eebce385 MS |
143 | static void netiucv_callback_rx(struct iucv_path *, struct iucv_message *); |
144 | static void netiucv_callback_txdone(struct iucv_path *, struct iucv_message *); | |
145 | ||
146 | static struct iucv_handler netiucv_handler = { | |
147 | .path_pending = netiucv_callback_connreq, | |
148 | .path_complete = netiucv_callback_connack, | |
149 | .path_severed = netiucv_callback_connrej, | |
150 | .path_quiesced = netiucv_callback_connsusp, | |
151 | .path_resumed = netiucv_callback_connres, | |
152 | .message_pending = netiucv_callback_rx, | |
153 | .message_complete = netiucv_callback_txdone | |
154 | }; | |
155 | ||
1da177e4 LT |
156 | /** |
157 | * Per connection profiling data | |
158 | */ | |
159 | struct connection_profile { | |
160 | unsigned long maxmulti; | |
161 | unsigned long maxcqueue; | |
162 | unsigned long doios_single; | |
163 | unsigned long doios_multi; | |
164 | unsigned long txlen; | |
165 | unsigned long tx_time; | |
ee6edb97 | 166 | unsigned long send_stamp; |
1da177e4 LT |
167 | unsigned long tx_pending; |
168 | unsigned long tx_max_pending; | |
169 | }; | |
170 | ||
171 | /** | |
172 | * Representation of one iucv connection | |
173 | */ | |
174 | struct iucv_connection { | |
eebce385 MS |
175 | struct list_head list; |
176 | struct iucv_path *path; | |
1da177e4 LT |
177 | struct sk_buff *rx_buff; |
178 | struct sk_buff *tx_buff; | |
179 | struct sk_buff_head collect_queue; | |
180 | struct sk_buff_head commit_queue; | |
181 | spinlock_t collect_lock; | |
182 | int collect_len; | |
183 | int max_buffsize; | |
184 | fsm_timer timer; | |
185 | fsm_instance *fsm; | |
186 | struct net_device *netdev; | |
187 | struct connection_profile prof; | |
188 | char userid[9]; | |
08e3356c | 189 | char userdata[17]; |
1da177e4 LT |
190 | }; |
191 | ||
192 | /** | |
193 | * Linked list of all connection structs. | |
194 | */ | |
c11ca97e | 195 | static LIST_HEAD(iucv_connection_list); |
bfac0d0b | 196 | static DEFINE_RWLOCK(iucv_connection_rwlock); |
1da177e4 LT |
197 | |
198 | /** | |
199 | * Representation of event-data for the | |
200 | * connection state machine. | |
201 | */ | |
202 | struct iucv_event { | |
203 | struct iucv_connection *conn; | |
204 | void *data; | |
205 | }; | |
206 | ||
207 | /** | |
208 | * Private part of the network device structure | |
209 | */ | |
210 | struct netiucv_priv { | |
211 | struct net_device_stats stats; | |
212 | unsigned long tbusy; | |
213 | fsm_instance *fsm; | |
214 | struct iucv_connection *conn; | |
215 | struct device *dev; | |
1175b257 | 216 | int pm_state; |
1da177e4 LT |
217 | }; |
218 | ||
219 | /** | |
220 | * Link level header for a packet. | |
221 | */ | |
eebce385 MS |
222 | struct ll_header { |
223 | u16 next; | |
224 | }; | |
1da177e4 | 225 | |
eebce385 | 226 | #define NETIUCV_HDRLEN (sizeof(struct ll_header)) |
08e3356c | 227 | #define NETIUCV_BUFSIZE_MAX 65537 |
1da177e4 LT |
228 | #define NETIUCV_BUFSIZE_DEFAULT NETIUCV_BUFSIZE_MAX |
229 | #define NETIUCV_MTU_MAX (NETIUCV_BUFSIZE_MAX - NETIUCV_HDRLEN) | |
230 | #define NETIUCV_MTU_DEFAULT 9216 | |
231 | #define NETIUCV_QUEUELEN_DEFAULT 50 | |
232 | #define NETIUCV_TIMEOUT_5SEC 5000 | |
233 | ||
234 | /** | |
235 | * Compatibility macros for busy handling | |
236 | * of network devices. | |
237 | */ | |
cef6ff22 | 238 | static void netiucv_clear_busy(struct net_device *dev) |
1da177e4 | 239 | { |
eebce385 MS |
240 | struct netiucv_priv *priv = netdev_priv(dev); |
241 | clear_bit(0, &priv->tbusy); | |
1da177e4 LT |
242 | netif_wake_queue(dev); |
243 | } | |
244 | ||
cef6ff22 | 245 | static int netiucv_test_and_set_busy(struct net_device *dev) |
1da177e4 | 246 | { |
eebce385 | 247 | struct netiucv_priv *priv = netdev_priv(dev); |
1da177e4 | 248 | netif_stop_queue(dev); |
eebce385 | 249 | return test_and_set_bit(0, &priv->tbusy); |
1da177e4 LT |
250 | } |
251 | ||
08e3356c UB |
252 | static u8 iucvMagic_ascii[16] = { |
253 | 0x30, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, | |
254 | 0x30, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20 | |
255 | }; | |
256 | ||
257 | static u8 iucvMagic_ebcdic[16] = { | |
1da177e4 LT |
258 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, |
259 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40 | |
260 | }; | |
261 | ||
1da177e4 LT |
262 | /** |
263 | * Convert an iucv userId to its printable | |
264 | * form (strip whitespace at end). | |
265 | * | |
266 | * @param An iucv userId | |
267 | * | |
268 | * @returns The printable string (static data!!) | |
269 | */ | |
08e3356c | 270 | static char *netiucv_printname(char *name, int len) |
1da177e4 | 271 | { |
08e3356c | 272 | static char tmp[17]; |
1da177e4 | 273 | char *p = tmp; |
08e3356c UB |
274 | memcpy(tmp, name, len); |
275 | tmp[len] = '\0'; | |
276 | while (*p && ((p - tmp) < len) && (!isspace(*p))) | |
1da177e4 LT |
277 | p++; |
278 | *p = '\0'; | |
279 | return tmp; | |
280 | } | |
e82b0f2c | 281 | |
08e3356c UB |
282 | static char *netiucv_printuser(struct iucv_connection *conn) |
283 | { | |
284 | static char tmp_uid[9]; | |
285 | static char tmp_udat[17]; | |
286 | static char buf[100]; | |
287 | ||
288 | if (memcmp(conn->userdata, iucvMagic_ebcdic, 16)) { | |
289 | tmp_uid[8] = '\0'; | |
290 | tmp_udat[16] = '\0'; | |
baac7898 | 291 | memcpy(tmp_uid, netiucv_printname(conn->userid, 8), 8); |
08e3356c UB |
292 | memcpy(tmp_udat, conn->userdata, 16); |
293 | EBCASC(tmp_udat, 16); | |
294 | memcpy(tmp_udat, netiucv_printname(tmp_udat, 16), 16); | |
295 | sprintf(buf, "%s.%s", tmp_uid, tmp_udat); | |
296 | return buf; | |
297 | } else | |
298 | return netiucv_printname(conn->userid, 8); | |
299 | } | |
300 | ||
1da177e4 LT |
301 | /** |
302 | * States of the interface statemachine. | |
303 | */ | |
304 | enum dev_states { | |
305 | DEV_STATE_STOPPED, | |
306 | DEV_STATE_STARTWAIT, | |
307 | DEV_STATE_STOPWAIT, | |
308 | DEV_STATE_RUNNING, | |
309 | /** | |
310 | * MUST be always the last element!! | |
311 | */ | |
312 | NR_DEV_STATES | |
313 | }; | |
314 | ||
315 | static const char *dev_state_names[] = { | |
316 | "Stopped", | |
317 | "StartWait", | |
318 | "StopWait", | |
319 | "Running", | |
320 | }; | |
321 | ||
322 | /** | |
323 | * Events of the interface statemachine. | |
324 | */ | |
325 | enum dev_events { | |
326 | DEV_EVENT_START, | |
327 | DEV_EVENT_STOP, | |
328 | DEV_EVENT_CONUP, | |
329 | DEV_EVENT_CONDOWN, | |
330 | /** | |
331 | * MUST be always the last element!! | |
332 | */ | |
333 | NR_DEV_EVENTS | |
334 | }; | |
335 | ||
336 | static const char *dev_event_names[] = { | |
337 | "Start", | |
338 | "Stop", | |
339 | "Connection up", | |
340 | "Connection down", | |
341 | }; | |
e82b0f2c | 342 | |
1da177e4 LT |
343 | /** |
344 | * Events of the connection statemachine | |
345 | */ | |
346 | enum conn_events { | |
347 | /** | |
348 | * Events, representing callbacks from | |
349 | * lowlevel iucv layer) | |
350 | */ | |
351 | CONN_EVENT_CONN_REQ, | |
352 | CONN_EVENT_CONN_ACK, | |
353 | CONN_EVENT_CONN_REJ, | |
354 | CONN_EVENT_CONN_SUS, | |
355 | CONN_EVENT_CONN_RES, | |
356 | CONN_EVENT_RX, | |
357 | CONN_EVENT_TXDONE, | |
358 | ||
359 | /** | |
360 | * Events, representing errors return codes from | |
361 | * calls to lowlevel iucv layer | |
362 | */ | |
363 | ||
364 | /** | |
365 | * Event, representing timer expiry. | |
366 | */ | |
367 | CONN_EVENT_TIMER, | |
368 | ||
369 | /** | |
370 | * Events, representing commands from upper levels. | |
371 | */ | |
372 | CONN_EVENT_START, | |
373 | CONN_EVENT_STOP, | |
374 | ||
375 | /** | |
376 | * MUST be always the last element!! | |
377 | */ | |
378 | NR_CONN_EVENTS, | |
379 | }; | |
380 | ||
381 | static const char *conn_event_names[] = { | |
382 | "Remote connection request", | |
383 | "Remote connection acknowledge", | |
384 | "Remote connection reject", | |
385 | "Connection suspended", | |
386 | "Connection resumed", | |
387 | "Data received", | |
388 | "Data sent", | |
389 | ||
390 | "Timer", | |
391 | ||
392 | "Start", | |
393 | "Stop", | |
394 | }; | |
395 | ||
396 | /** | |
397 | * States of the connection statemachine. | |
398 | */ | |
399 | enum conn_states { | |
400 | /** | |
401 | * Connection not assigned to any device, | |
402 | * initial state, invalid | |
403 | */ | |
404 | CONN_STATE_INVALID, | |
405 | ||
406 | /** | |
407 | * Userid assigned but not operating | |
408 | */ | |
409 | CONN_STATE_STOPPED, | |
410 | ||
411 | /** | |
412 | * Connection registered, | |
413 | * no connection request sent yet, | |
414 | * no connection request received | |
415 | */ | |
416 | CONN_STATE_STARTWAIT, | |
417 | ||
418 | /** | |
419 | * Connection registered and connection request sent, | |
420 | * no acknowledge and no connection request received yet. | |
421 | */ | |
422 | CONN_STATE_SETUPWAIT, | |
423 | ||
424 | /** | |
425 | * Connection up and running idle | |
426 | */ | |
427 | CONN_STATE_IDLE, | |
428 | ||
429 | /** | |
430 | * Data sent, awaiting CONN_EVENT_TXDONE | |
431 | */ | |
432 | CONN_STATE_TX, | |
433 | ||
434 | /** | |
435 | * Error during registration. | |
436 | */ | |
437 | CONN_STATE_REGERR, | |
438 | ||
439 | /** | |
440 | * Error during registration. | |
441 | */ | |
442 | CONN_STATE_CONNERR, | |
443 | ||
444 | /** | |
445 | * MUST be always the last element!! | |
446 | */ | |
447 | NR_CONN_STATES, | |
448 | }; | |
449 | ||
450 | static const char *conn_state_names[] = { | |
451 | "Invalid", | |
452 | "Stopped", | |
453 | "StartWait", | |
454 | "SetupWait", | |
455 | "Idle", | |
456 | "TX", | |
457 | "Terminating", | |
458 | "Registration error", | |
459 | "Connect error", | |
460 | }; | |
461 | ||
e82b0f2c | 462 | |
1da177e4 LT |
463 | /** |
464 | * Debug Facility Stuff | |
465 | */ | |
466 | static debug_info_t *iucv_dbf_setup = NULL; | |
467 | static debug_info_t *iucv_dbf_data = NULL; | |
468 | static debug_info_t *iucv_dbf_trace = NULL; | |
469 | ||
470 | DEFINE_PER_CPU(char[256], iucv_dbf_txt_buf); | |
471 | ||
eebce385 | 472 | static void iucv_unregister_dbf_views(void) |
1da177e4 | 473 | { |
b646c08e ME |
474 | debug_unregister(iucv_dbf_setup); |
475 | debug_unregister(iucv_dbf_data); | |
476 | debug_unregister(iucv_dbf_trace); | |
1da177e4 | 477 | } |
eebce385 | 478 | static int iucv_register_dbf_views(void) |
1da177e4 LT |
479 | { |
480 | iucv_dbf_setup = debug_register(IUCV_DBF_SETUP_NAME, | |
66a464db | 481 | IUCV_DBF_SETUP_PAGES, |
1da177e4 LT |
482 | IUCV_DBF_SETUP_NR_AREAS, |
483 | IUCV_DBF_SETUP_LEN); | |
484 | iucv_dbf_data = debug_register(IUCV_DBF_DATA_NAME, | |
66a464db | 485 | IUCV_DBF_DATA_PAGES, |
1da177e4 LT |
486 | IUCV_DBF_DATA_NR_AREAS, |
487 | IUCV_DBF_DATA_LEN); | |
488 | iucv_dbf_trace = debug_register(IUCV_DBF_TRACE_NAME, | |
66a464db | 489 | IUCV_DBF_TRACE_PAGES, |
1da177e4 LT |
490 | IUCV_DBF_TRACE_NR_AREAS, |
491 | IUCV_DBF_TRACE_LEN); | |
492 | ||
493 | if ((iucv_dbf_setup == NULL) || (iucv_dbf_data == NULL) || | |
494 | (iucv_dbf_trace == NULL)) { | |
495 | iucv_unregister_dbf_views(); | |
496 | return -ENOMEM; | |
497 | } | |
498 | debug_register_view(iucv_dbf_setup, &debug_hex_ascii_view); | |
499 | debug_set_level(iucv_dbf_setup, IUCV_DBF_SETUP_LEVEL); | |
500 | ||
501 | debug_register_view(iucv_dbf_data, &debug_hex_ascii_view); | |
502 | debug_set_level(iucv_dbf_data, IUCV_DBF_DATA_LEVEL); | |
503 | ||
504 | debug_register_view(iucv_dbf_trace, &debug_hex_ascii_view); | |
505 | debug_set_level(iucv_dbf_trace, IUCV_DBF_TRACE_LEVEL); | |
506 | ||
507 | return 0; | |
508 | } | |
509 | ||
eebce385 | 510 | /* |
1da177e4 | 511 | * Callback-wrappers, called from lowlevel iucv layer. |
eebce385 | 512 | */ |
1da177e4 | 513 | |
eebce385 MS |
514 | static void netiucv_callback_rx(struct iucv_path *path, |
515 | struct iucv_message *msg) | |
1da177e4 | 516 | { |
eebce385 | 517 | struct iucv_connection *conn = path->private; |
1da177e4 LT |
518 | struct iucv_event ev; |
519 | ||
520 | ev.conn = conn; | |
eebce385 | 521 | ev.data = msg; |
1da177e4 LT |
522 | fsm_event(conn->fsm, CONN_EVENT_RX, &ev); |
523 | } | |
524 | ||
eebce385 MS |
525 | static void netiucv_callback_txdone(struct iucv_path *path, |
526 | struct iucv_message *msg) | |
1da177e4 | 527 | { |
eebce385 | 528 | struct iucv_connection *conn = path->private; |
1da177e4 LT |
529 | struct iucv_event ev; |
530 | ||
531 | ev.conn = conn; | |
eebce385 | 532 | ev.data = msg; |
1da177e4 LT |
533 | fsm_event(conn->fsm, CONN_EVENT_TXDONE, &ev); |
534 | } | |
535 | ||
eebce385 | 536 | static void netiucv_callback_connack(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 537 | { |
eebce385 | 538 | struct iucv_connection *conn = path->private; |
1da177e4 | 539 | |
eebce385 | 540 | fsm_event(conn->fsm, CONN_EVENT_CONN_ACK, conn); |
1da177e4 LT |
541 | } |
542 | ||
91e60eb6 UB |
543 | static int netiucv_callback_connreq(struct iucv_path *path, u8 *ipvmid, |
544 | u8 *ipuser) | |
1da177e4 | 545 | { |
eebce385 | 546 | struct iucv_connection *conn = path->private; |
1da177e4 | 547 | struct iucv_event ev; |
08e3356c UB |
548 | static char tmp_user[9]; |
549 | static char tmp_udat[17]; | |
eebce385 | 550 | int rc; |
1da177e4 | 551 | |
eebce385 | 552 | rc = -EINVAL; |
08e3356c UB |
553 | memcpy(tmp_user, netiucv_printname(ipvmid, 8), 8); |
554 | memcpy(tmp_udat, ipuser, 16); | |
555 | EBCASC(tmp_udat, 16); | |
eebce385 MS |
556 | read_lock_bh(&iucv_connection_rwlock); |
557 | list_for_each_entry(conn, &iucv_connection_list, list) { | |
08e3356c UB |
558 | if (strncmp(ipvmid, conn->userid, 8) || |
559 | strncmp(ipuser, conn->userdata, 16)) | |
eebce385 MS |
560 | continue; |
561 | /* Found a matching connection for this path. */ | |
562 | conn->path = path; | |
563 | ev.conn = conn; | |
564 | ev.data = path; | |
565 | fsm_event(conn->fsm, CONN_EVENT_CONN_REQ, &ev); | |
566 | rc = 0; | |
567 | } | |
08e3356c UB |
568 | IUCV_DBF_TEXT_(setup, 2, "Connection requested for %s.%s\n", |
569 | tmp_user, netiucv_printname(tmp_udat, 16)); | |
eebce385 MS |
570 | read_unlock_bh(&iucv_connection_rwlock); |
571 | return rc; | |
1da177e4 LT |
572 | } |
573 | ||
91e60eb6 | 574 | static void netiucv_callback_connrej(struct iucv_path *path, u8 *ipuser) |
1da177e4 | 575 | { |
eebce385 | 576 | struct iucv_connection *conn = path->private; |
1da177e4 | 577 | |
eebce385 | 578 | fsm_event(conn->fsm, CONN_EVENT_CONN_REJ, conn); |
1da177e4 LT |
579 | } |
580 | ||
91e60eb6 | 581 | static void netiucv_callback_connsusp(struct iucv_path *path, u8 *ipuser) |
1da177e4 | 582 | { |
eebce385 | 583 | struct iucv_connection *conn = path->private; |
1da177e4 | 584 | |
eebce385 | 585 | fsm_event(conn->fsm, CONN_EVENT_CONN_SUS, conn); |
1da177e4 LT |
586 | } |
587 | ||
91e60eb6 | 588 | static void netiucv_callback_connres(struct iucv_path *path, u8 *ipuser) |
1da177e4 | 589 | { |
eebce385 | 590 | struct iucv_connection *conn = path->private; |
1da177e4 | 591 | |
eebce385 MS |
592 | fsm_event(conn->fsm, CONN_EVENT_CONN_RES, conn); |
593 | } | |
1da177e4 LT |
594 | |
595 | /** | |
21b26f2f | 596 | * NOP action for statemachines |
1da177e4 | 597 | */ |
21b26f2f | 598 | static void netiucv_action_nop(fsm_instance *fi, int event, void *arg) |
1da177e4 LT |
599 | { |
600 | } | |
e82b0f2c | 601 | |
eebce385 | 602 | /* |
1da177e4 | 603 | * Actions of the connection statemachine |
eebce385 | 604 | */ |
1da177e4 LT |
605 | |
606 | /** | |
eebce385 MS |
607 | * netiucv_unpack_skb |
608 | * @conn: The connection where this skb has been received. | |
609 | * @pskb: The received skb. | |
1da177e4 | 610 | * |
eebce385 MS |
611 | * Unpack a just received skb and hand it over to upper layers. |
612 | * Helper function for conn_action_rx. | |
1da177e4 | 613 | */ |
eebce385 MS |
614 | static void netiucv_unpack_skb(struct iucv_connection *conn, |
615 | struct sk_buff *pskb) | |
1da177e4 LT |
616 | { |
617 | struct net_device *dev = conn->netdev; | |
eebce385 MS |
618 | struct netiucv_priv *privptr = netdev_priv(dev); |
619 | u16 offset = 0; | |
1da177e4 LT |
620 | |
621 | skb_put(pskb, NETIUCV_HDRLEN); | |
622 | pskb->dev = dev; | |
623 | pskb->ip_summed = CHECKSUM_NONE; | |
6c37c60c | 624 | pskb->protocol = cpu_to_be16(ETH_P_IP); |
1da177e4 LT |
625 | |
626 | while (1) { | |
627 | struct sk_buff *skb; | |
eebce385 | 628 | struct ll_header *header = (struct ll_header *) pskb->data; |
1da177e4 LT |
629 | |
630 | if (!header->next) | |
631 | break; | |
632 | ||
633 | skb_pull(pskb, NETIUCV_HDRLEN); | |
634 | header->next -= offset; | |
635 | offset += header->next; | |
636 | header->next -= NETIUCV_HDRLEN; | |
637 | if (skb_tailroom(pskb) < header->next) { | |
1da177e4 LT |
638 | IUCV_DBF_TEXT_(data, 2, "Illegal next field: %d > %d\n", |
639 | header->next, skb_tailroom(pskb)); | |
640 | return; | |
641 | } | |
642 | skb_put(pskb, header->next); | |
459a98ed | 643 | skb_reset_mac_header(pskb); |
1da177e4 LT |
644 | skb = dev_alloc_skb(pskb->len); |
645 | if (!skb) { | |
1da177e4 LT |
646 | IUCV_DBF_TEXT(data, 2, |
647 | "Out of memory in netiucv_unpack_skb\n"); | |
648 | privptr->stats.rx_dropped++; | |
649 | return; | |
650 | } | |
d626f62b ACM |
651 | skb_copy_from_linear_data(pskb, skb_put(skb, pskb->len), |
652 | pskb->len); | |
459a98ed | 653 | skb_reset_mac_header(skb); |
1da177e4 LT |
654 | skb->dev = pskb->dev; |
655 | skb->protocol = pskb->protocol; | |
656 | pskb->ip_summed = CHECKSUM_UNNECESSARY; | |
9b3efc01 JL |
657 | privptr->stats.rx_packets++; |
658 | privptr->stats.rx_bytes += skb->len; | |
1da177e4 LT |
659 | /* |
660 | * Since receiving is always initiated from a tasklet (in iucv.c), | |
661 | * we must use netif_rx_ni() instead of netif_rx() | |
662 | */ | |
663 | netif_rx_ni(skb); | |
1da177e4 LT |
664 | skb_pull(pskb, header->next); |
665 | skb_put(pskb, NETIUCV_HDRLEN); | |
666 | } | |
667 | } | |
668 | ||
eebce385 | 669 | static void conn_action_rx(fsm_instance *fi, int event, void *arg) |
1da177e4 | 670 | { |
eebce385 | 671 | struct iucv_event *ev = arg; |
1da177e4 | 672 | struct iucv_connection *conn = ev->conn; |
eebce385 MS |
673 | struct iucv_message *msg = ev->data; |
674 | struct netiucv_priv *privptr = netdev_priv(conn->netdev); | |
1da177e4 LT |
675 | int rc; |
676 | ||
2a2cf6b1 | 677 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
678 | |
679 | if (!conn->netdev) { | |
eebce385 | 680 | iucv_message_reject(conn->path, msg); |
1da177e4 | 681 | IUCV_DBF_TEXT(data, 2, |
eebce385 | 682 | "Received data for unlinked connection\n"); |
1da177e4 LT |
683 | return; |
684 | } | |
eebce385 MS |
685 | if (msg->length > conn->max_buffsize) { |
686 | iucv_message_reject(conn->path, msg); | |
1da177e4 | 687 | privptr->stats.rx_dropped++; |
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 | } | |
27a884dc ACM |
692 | conn->rx_buff->data = conn->rx_buff->head; |
693 | skb_reset_tail_pointer(conn->rx_buff); | |
1da177e4 | 694 | conn->rx_buff->len = 0; |
eebce385 MS |
695 | rc = iucv_message_receive(conn->path, msg, 0, conn->rx_buff->data, |
696 | msg->length, NULL); | |
697 | if (rc || msg->length < 5) { | |
1da177e4 | 698 | privptr->stats.rx_errors++; |
1da177e4 LT |
699 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_receive\n", rc); |
700 | return; | |
701 | } | |
702 | netiucv_unpack_skb(conn, conn->rx_buff); | |
703 | } | |
704 | ||
eebce385 | 705 | static void conn_action_txdone(fsm_instance *fi, int event, void *arg) |
1da177e4 | 706 | { |
eebce385 | 707 | struct iucv_event *ev = arg; |
1da177e4 | 708 | struct iucv_connection *conn = ev->conn; |
eebce385 MS |
709 | struct iucv_message *msg = ev->data; |
710 | struct iucv_message txmsg; | |
1da177e4 | 711 | struct netiucv_priv *privptr = NULL; |
eebce385 MS |
712 | u32 single_flag = msg->tag; |
713 | u32 txbytes = 0; | |
714 | u32 txpackets = 0; | |
715 | u32 stat_maxcq = 0; | |
1da177e4 LT |
716 | struct sk_buff *skb; |
717 | unsigned long saveflags; | |
eebce385 MS |
718 | struct ll_header header; |
719 | int rc; | |
1da177e4 | 720 | |
2a2cf6b1 | 721 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 | 722 | |
d239ae33 UB |
723 | if (!conn || !conn->netdev) { |
724 | IUCV_DBF_TEXT(data, 2, | |
725 | "Send confirmation for unlinked connection\n"); | |
726 | return; | |
727 | } | |
728 | privptr = netdev_priv(conn->netdev); | |
1da177e4 LT |
729 | conn->prof.tx_pending--; |
730 | if (single_flag) { | |
731 | if ((skb = skb_dequeue(&conn->commit_queue))) { | |
63354797 | 732 | refcount_dec(&skb->users); |
1da177e4 LT |
733 | if (privptr) { |
734 | privptr->stats.tx_packets++; | |
735 | privptr->stats.tx_bytes += | |
736 | (skb->len - NETIUCV_HDRLEN | |
998221c2 | 737 | - NETIUCV_HDRLEN); |
1da177e4 | 738 | } |
998221c2 | 739 | dev_kfree_skb_any(skb); |
1da177e4 LT |
740 | } |
741 | } | |
27a884dc ACM |
742 | conn->tx_buff->data = conn->tx_buff->head; |
743 | skb_reset_tail_pointer(conn->tx_buff); | |
1da177e4 LT |
744 | conn->tx_buff->len = 0; |
745 | spin_lock_irqsave(&conn->collect_lock, saveflags); | |
746 | while ((skb = skb_dequeue(&conn->collect_queue))) { | |
747 | header.next = conn->tx_buff->len + skb->len + NETIUCV_HDRLEN; | |
59ae1d12 | 748 | skb_put_data(conn->tx_buff, &header, NETIUCV_HDRLEN); |
d626f62b ACM |
749 | skb_copy_from_linear_data(skb, |
750 | skb_put(conn->tx_buff, skb->len), | |
751 | skb->len); | |
1da177e4 LT |
752 | txbytes += skb->len; |
753 | txpackets++; | |
754 | stat_maxcq++; | |
63354797 | 755 | refcount_dec(&skb->users); |
1da177e4 LT |
756 | dev_kfree_skb_any(skb); |
757 | } | |
758 | if (conn->collect_len > conn->prof.maxmulti) | |
759 | conn->prof.maxmulti = conn->collect_len; | |
760 | conn->collect_len = 0; | |
761 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); | |
eebce385 MS |
762 | if (conn->tx_buff->len == 0) { |
763 | fsm_newstate(fi, CONN_STATE_IDLE); | |
764 | return; | |
765 | } | |
1da177e4 | 766 | |
eebce385 | 767 | header.next = 0; |
59ae1d12 | 768 | skb_put_data(conn->tx_buff, &header, NETIUCV_HDRLEN); |
ee6edb97 | 769 | conn->prof.send_stamp = jiffies; |
eebce385 MS |
770 | txmsg.class = 0; |
771 | txmsg.tag = 0; | |
772 | rc = iucv_message_send(conn->path, &txmsg, 0, 0, | |
1da177e4 | 773 | conn->tx_buff->data, conn->tx_buff->len); |
eebce385 MS |
774 | conn->prof.doios_multi++; |
775 | conn->prof.txlen += conn->tx_buff->len; | |
776 | conn->prof.tx_pending++; | |
777 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) | |
778 | conn->prof.tx_max_pending = conn->prof.tx_pending; | |
779 | if (rc) { | |
780 | conn->prof.tx_pending--; | |
1da177e4 | 781 | fsm_newstate(fi, CONN_STATE_IDLE); |
eebce385 MS |
782 | if (privptr) |
783 | privptr->stats.tx_errors += txpackets; | |
eebce385 MS |
784 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); |
785 | } else { | |
786 | if (privptr) { | |
787 | privptr->stats.tx_packets += txpackets; | |
788 | privptr->stats.tx_bytes += txbytes; | |
789 | } | |
790 | if (stat_maxcq > conn->prof.maxcqueue) | |
791 | conn->prof.maxcqueue = stat_maxcq; | |
792 | } | |
1da177e4 LT |
793 | } |
794 | ||
eebce385 | 795 | static void conn_action_connaccept(fsm_instance *fi, int event, void *arg) |
1da177e4 | 796 | { |
eebce385 | 797 | struct iucv_event *ev = arg; |
1da177e4 | 798 | struct iucv_connection *conn = ev->conn; |
eebce385 | 799 | struct iucv_path *path = ev->data; |
1da177e4 | 800 | struct net_device *netdev = conn->netdev; |
eebce385 | 801 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 802 | int rc; |
1da177e4 | 803 | |
2a2cf6b1 | 804 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 805 | |
eebce385 MS |
806 | conn->path = path; |
807 | path->msglim = NETIUCV_QUEUELEN_DEFAULT; | |
808 | path->flags = 0; | |
08e3356c | 809 | rc = iucv_path_accept(path, &netiucv_handler, conn->userdata , conn); |
1da177e4 | 810 | if (rc) { |
1da177e4 LT |
811 | IUCV_DBF_TEXT_(setup, 2, "rc %d from iucv_accept", rc); |
812 | return; | |
813 | } | |
814 | fsm_newstate(fi, CONN_STATE_IDLE); | |
eebce385 | 815 | netdev->tx_queue_len = conn->path->msglim; |
1da177e4 LT |
816 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); |
817 | } | |
818 | ||
eebce385 | 819 | static void conn_action_connreject(fsm_instance *fi, int event, void *arg) |
1da177e4 | 820 | { |
eebce385 MS |
821 | struct iucv_event *ev = arg; |
822 | struct iucv_path *path = ev->data; | |
1da177e4 | 823 | |
2a2cf6b1 | 824 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 | 825 | iucv_path_sever(path, NULL); |
1da177e4 LT |
826 | } |
827 | ||
eebce385 | 828 | static void conn_action_connack(fsm_instance *fi, int event, void *arg) |
1da177e4 | 829 | { |
eebce385 | 830 | struct iucv_connection *conn = arg; |
1da177e4 | 831 | struct net_device *netdev = conn->netdev; |
eebce385 | 832 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 833 | |
2a2cf6b1 | 834 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
835 | fsm_deltimer(&conn->timer); |
836 | fsm_newstate(fi, CONN_STATE_IDLE); | |
eebce385 | 837 | netdev->tx_queue_len = conn->path->msglim; |
1da177e4 LT |
838 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); |
839 | } | |
840 | ||
eebce385 | 841 | static void conn_action_conntimsev(fsm_instance *fi, int event, void *arg) |
1da177e4 | 842 | { |
eebce385 | 843 | struct iucv_connection *conn = arg; |
1da177e4 | 844 | |
2a2cf6b1 | 845 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 846 | fsm_deltimer(&conn->timer); |
08e3356c | 847 | iucv_path_sever(conn->path, conn->userdata); |
1da177e4 LT |
848 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
849 | } | |
850 | ||
eebce385 | 851 | static void conn_action_connsever(fsm_instance *fi, int event, void *arg) |
1da177e4 | 852 | { |
eebce385 | 853 | struct iucv_connection *conn = arg; |
1da177e4 | 854 | struct net_device *netdev = conn->netdev; |
eebce385 | 855 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 856 | |
2a2cf6b1 | 857 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
858 | |
859 | fsm_deltimer(&conn->timer); | |
08e3356c UB |
860 | iucv_path_sever(conn->path, conn->userdata); |
861 | dev_info(privptr->dev, "The peer z/VM guest %s has closed the " | |
862 | "connection\n", netiucv_printuser(conn)); | |
1da177e4 | 863 | IUCV_DBF_TEXT(data, 2, |
eebce385 | 864 | "conn_action_connsever: Remote dropped connection\n"); |
1da177e4 LT |
865 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
866 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); | |
867 | } | |
868 | ||
eebce385 | 869 | static void conn_action_start(fsm_instance *fi, int event, void *arg) |
1da177e4 | 870 | { |
eebce385 | 871 | struct iucv_connection *conn = arg; |
8f7c502c UB |
872 | struct net_device *netdev = conn->netdev; |
873 | struct netiucv_priv *privptr = netdev_priv(netdev); | |
1da177e4 LT |
874 | int rc; |
875 | ||
2a2cf6b1 | 876 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 877 | |
eebce385 | 878 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
1da177e4 | 879 | |
eebce385 MS |
880 | /* |
881 | * We must set the state before calling iucv_connect because the | |
882 | * callback handler could be called at any point after the connection | |
883 | * request is sent | |
884 | */ | |
1da177e4 LT |
885 | |
886 | fsm_newstate(fi, CONN_STATE_SETUPWAIT); | |
eebce385 | 887 | conn->path = iucv_path_alloc(NETIUCV_QUEUELEN_DEFAULT, 0, GFP_KERNEL); |
08e3356c UB |
888 | IUCV_DBF_TEXT_(setup, 2, "%s: connecting to %s ...\n", |
889 | netdev->name, netiucv_printuser(conn)); | |
890 | ||
eebce385 | 891 | rc = iucv_path_connect(conn->path, &netiucv_handler, conn->userid, |
08e3356c | 892 | NULL, conn->userdata, conn); |
1da177e4 | 893 | switch (rc) { |
eebce385 | 894 | case 0: |
8f7c502c | 895 | netdev->tx_queue_len = conn->path->msglim; |
eebce385 MS |
896 | fsm_addtimer(&conn->timer, NETIUCV_TIMEOUT_5SEC, |
897 | CONN_EVENT_TIMER, conn); | |
898 | return; | |
899 | case 11: | |
8f7c502c UB |
900 | dev_warn(privptr->dev, |
901 | "The IUCV device failed to connect to z/VM guest %s\n", | |
08e3356c | 902 | netiucv_printname(conn->userid, 8)); |
eebce385 MS |
903 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
904 | break; | |
905 | case 12: | |
8f7c502c UB |
906 | dev_warn(privptr->dev, |
907 | "The IUCV device failed to connect to the peer on z/VM" | |
08e3356c | 908 | " guest %s\n", netiucv_printname(conn->userid, 8)); |
eebce385 MS |
909 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
910 | break; | |
911 | case 13: | |
8f7c502c UB |
912 | dev_err(privptr->dev, |
913 | "Connecting the IUCV device would exceed the maximum" | |
914 | " number of IUCV connections\n"); | |
eebce385 MS |
915 | fsm_newstate(fi, CONN_STATE_CONNERR); |
916 | break; | |
917 | case 14: | |
8f7c502c UB |
918 | dev_err(privptr->dev, |
919 | "z/VM guest %s has too many IUCV connections" | |
920 | " to connect with the IUCV device\n", | |
08e3356c | 921 | netiucv_printname(conn->userid, 8)); |
eebce385 MS |
922 | fsm_newstate(fi, CONN_STATE_CONNERR); |
923 | break; | |
924 | case 15: | |
8f7c502c UB |
925 | dev_err(privptr->dev, |
926 | "The IUCV device cannot connect to a z/VM guest with no" | |
927 | " IUCV authorization\n"); | |
eebce385 MS |
928 | fsm_newstate(fi, CONN_STATE_CONNERR); |
929 | break; | |
930 | default: | |
8f7c502c UB |
931 | dev_err(privptr->dev, |
932 | "Connecting the IUCV device failed with error %d\n", | |
933 | rc); | |
eebce385 MS |
934 | fsm_newstate(fi, CONN_STATE_CONNERR); |
935 | break; | |
1da177e4 LT |
936 | } |
937 | IUCV_DBF_TEXT_(setup, 5, "iucv_connect rc is %d\n", rc); | |
eebce385 MS |
938 | kfree(conn->path); |
939 | conn->path = NULL; | |
1da177e4 LT |
940 | } |
941 | ||
eebce385 | 942 | static void netiucv_purge_skb_queue(struct sk_buff_head *q) |
1da177e4 LT |
943 | { |
944 | struct sk_buff *skb; | |
945 | ||
946 | while ((skb = skb_dequeue(q))) { | |
63354797 | 947 | refcount_dec(&skb->users); |
1da177e4 LT |
948 | dev_kfree_skb_any(skb); |
949 | } | |
950 | } | |
951 | ||
eebce385 | 952 | static void conn_action_stop(fsm_instance *fi, int event, void *arg) |
1da177e4 | 953 | { |
eebce385 | 954 | struct iucv_event *ev = arg; |
1da177e4 LT |
955 | struct iucv_connection *conn = ev->conn; |
956 | struct net_device *netdev = conn->netdev; | |
eebce385 | 957 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 958 | |
2a2cf6b1 | 959 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
960 | |
961 | fsm_deltimer(&conn->timer); | |
962 | fsm_newstate(fi, CONN_STATE_STOPPED); | |
963 | netiucv_purge_skb_queue(&conn->collect_queue); | |
eebce385 MS |
964 | if (conn->path) { |
965 | IUCV_DBF_TEXT(trace, 5, "calling iucv_path_sever\n"); | |
08e3356c | 966 | iucv_path_sever(conn->path, conn->userdata); |
eebce385 MS |
967 | kfree(conn->path); |
968 | conn->path = NULL; | |
969 | } | |
1da177e4 LT |
970 | netiucv_purge_skb_queue(&conn->commit_queue); |
971 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); | |
972 | } | |
973 | ||
eebce385 | 974 | static void conn_action_inval(fsm_instance *fi, int event, void *arg) |
1da177e4 | 975 | { |
eebce385 | 976 | struct iucv_connection *conn = arg; |
1da177e4 LT |
977 | struct net_device *netdev = conn->netdev; |
978 | ||
f082bcae UB |
979 | IUCV_DBF_TEXT_(data, 2, "%s('%s'): conn_action_inval called\n", |
980 | netdev->name, conn->userid); | |
1da177e4 LT |
981 | } |
982 | ||
983 | static const fsm_node conn_fsm[] = { | |
984 | { CONN_STATE_INVALID, CONN_EVENT_START, conn_action_inval }, | |
985 | { CONN_STATE_STOPPED, CONN_EVENT_START, conn_action_start }, | |
986 | ||
987 | { CONN_STATE_STOPPED, CONN_EVENT_STOP, conn_action_stop }, | |
988 | { CONN_STATE_STARTWAIT, CONN_EVENT_STOP, conn_action_stop }, | |
989 | { CONN_STATE_SETUPWAIT, CONN_EVENT_STOP, conn_action_stop }, | |
990 | { CONN_STATE_IDLE, CONN_EVENT_STOP, conn_action_stop }, | |
991 | { CONN_STATE_TX, CONN_EVENT_STOP, conn_action_stop }, | |
992 | { CONN_STATE_REGERR, CONN_EVENT_STOP, conn_action_stop }, | |
993 | { CONN_STATE_CONNERR, CONN_EVENT_STOP, conn_action_stop }, | |
994 | ||
995 | { CONN_STATE_STOPPED, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
996 | { CONN_STATE_STARTWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, | |
997 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, | |
998 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
999 | { CONN_STATE_TX, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
1000 | ||
1001 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_ACK, conn_action_connack }, | |
1002 | { CONN_STATE_SETUPWAIT, CONN_EVENT_TIMER, conn_action_conntimsev }, | |
1003 | ||
1004 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
1005 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
1006 | { CONN_STATE_TX, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
1007 | ||
1008 | { CONN_STATE_IDLE, CONN_EVENT_RX, conn_action_rx }, | |
1009 | { CONN_STATE_TX, CONN_EVENT_RX, conn_action_rx }, | |
1010 | ||
1011 | { CONN_STATE_TX, CONN_EVENT_TXDONE, conn_action_txdone }, | |
1012 | { CONN_STATE_IDLE, CONN_EVENT_TXDONE, conn_action_txdone }, | |
1013 | }; | |
1014 | ||
1015 | static const int CONN_FSM_LEN = sizeof(conn_fsm) / sizeof(fsm_node); | |
1016 | ||
e82b0f2c | 1017 | |
eebce385 | 1018 | /* |
1da177e4 | 1019 | * Actions for interface - statemachine. |
eebce385 | 1020 | */ |
1da177e4 LT |
1021 | |
1022 | /** | |
eebce385 MS |
1023 | * dev_action_start |
1024 | * @fi: An instance of an interface statemachine. | |
1025 | * @event: The event, just happened. | |
1026 | * @arg: Generic pointer, casted from struct net_device * upon call. | |
1da177e4 | 1027 | * |
eebce385 | 1028 | * Startup connection by sending CONN_EVENT_START to it. |
1da177e4 | 1029 | */ |
eebce385 | 1030 | static void dev_action_start(fsm_instance *fi, int event, void *arg) |
1da177e4 | 1031 | { |
eebce385 MS |
1032 | struct net_device *dev = arg; |
1033 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 | 1034 | |
2a2cf6b1 | 1035 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 1036 | |
1da177e4 | 1037 | fsm_newstate(fi, DEV_STATE_STARTWAIT); |
eebce385 | 1038 | fsm_event(privptr->conn->fsm, CONN_EVENT_START, privptr->conn); |
1da177e4 LT |
1039 | } |
1040 | ||
1041 | /** | |
1042 | * Shutdown connection by sending CONN_EVENT_STOP to it. | |
1043 | * | |
1044 | * @param fi An instance of an interface statemachine. | |
1045 | * @param event The event, just happened. | |
1046 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1047 | */ | |
1048 | static void | |
1049 | dev_action_stop(fsm_instance *fi, int event, void *arg) | |
1050 | { | |
eebce385 MS |
1051 | struct net_device *dev = arg; |
1052 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 LT |
1053 | struct iucv_event ev; |
1054 | ||
2a2cf6b1 | 1055 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1056 | |
1057 | ev.conn = privptr->conn; | |
1058 | ||
1059 | fsm_newstate(fi, DEV_STATE_STOPWAIT); | |
1060 | fsm_event(privptr->conn->fsm, CONN_EVENT_STOP, &ev); | |
1061 | } | |
1062 | ||
1063 | /** | |
1064 | * Called from connection statemachine | |
1065 | * when a connection is up and running. | |
1066 | * | |
1067 | * @param fi An instance of an interface statemachine. | |
1068 | * @param event The event, just happened. | |
1069 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1070 | */ | |
1071 | static void | |
1072 | dev_action_connup(fsm_instance *fi, int event, void *arg) | |
1073 | { | |
eebce385 MS |
1074 | struct net_device *dev = arg; |
1075 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 | 1076 | |
2a2cf6b1 | 1077 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1078 | |
1079 | switch (fsm_getstate(fi)) { | |
1080 | case DEV_STATE_STARTWAIT: | |
1081 | fsm_newstate(fi, DEV_STATE_RUNNING); | |
8f7c502c UB |
1082 | dev_info(privptr->dev, |
1083 | "The IUCV device has been connected" | |
08e3356c UB |
1084 | " successfully to %s\n", |
1085 | netiucv_printuser(privptr->conn)); | |
1da177e4 LT |
1086 | IUCV_DBF_TEXT(setup, 3, |
1087 | "connection is up and running\n"); | |
1088 | break; | |
1089 | case DEV_STATE_STOPWAIT: | |
1da177e4 LT |
1090 | IUCV_DBF_TEXT(data, 2, |
1091 | "dev_action_connup: in DEV_STATE_STOPWAIT\n"); | |
1092 | break; | |
1093 | } | |
1094 | } | |
1095 | ||
1096 | /** | |
1097 | * Called from connection statemachine | |
1098 | * when a connection has been shutdown. | |
1099 | * | |
1100 | * @param fi An instance of an interface statemachine. | |
1101 | * @param event The event, just happened. | |
1102 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1103 | */ | |
1104 | static void | |
1105 | dev_action_conndown(fsm_instance *fi, int event, void *arg) | |
1106 | { | |
2a2cf6b1 | 1107 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1108 | |
1109 | switch (fsm_getstate(fi)) { | |
1110 | case DEV_STATE_RUNNING: | |
1111 | fsm_newstate(fi, DEV_STATE_STARTWAIT); | |
1112 | break; | |
1113 | case DEV_STATE_STOPWAIT: | |
1114 | fsm_newstate(fi, DEV_STATE_STOPPED); | |
1115 | IUCV_DBF_TEXT(setup, 3, "connection is down\n"); | |
1116 | break; | |
1117 | } | |
1118 | } | |
1119 | ||
1120 | static const fsm_node dev_fsm[] = { | |
1121 | { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start }, | |
1122 | ||
1123 | { DEV_STATE_STOPWAIT, DEV_EVENT_START, dev_action_start }, | |
1124 | { DEV_STATE_STOPWAIT, DEV_EVENT_CONDOWN, dev_action_conndown }, | |
1125 | ||
1126 | { DEV_STATE_STARTWAIT, DEV_EVENT_STOP, dev_action_stop }, | |
1127 | { DEV_STATE_STARTWAIT, DEV_EVENT_CONUP, dev_action_connup }, | |
1128 | ||
1129 | { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop }, | |
1130 | { DEV_STATE_RUNNING, DEV_EVENT_CONDOWN, dev_action_conndown }, | |
21b26f2f | 1131 | { DEV_STATE_RUNNING, DEV_EVENT_CONUP, netiucv_action_nop }, |
1da177e4 LT |
1132 | }; |
1133 | ||
1134 | static const int DEV_FSM_LEN = sizeof(dev_fsm) / sizeof(fsm_node); | |
1135 | ||
1136 | /** | |
1137 | * Transmit a packet. | |
1138 | * This is a helper function for netiucv_tx(). | |
1139 | * | |
1140 | * @param conn Connection to be used for sending. | |
1141 | * @param skb Pointer to struct sk_buff of packet to send. | |
1142 | * The linklevel header has already been set up | |
1143 | * by netiucv_tx(). | |
1144 | * | |
1145 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1146 | */ | |
eebce385 MS |
1147 | static int netiucv_transmit_skb(struct iucv_connection *conn, |
1148 | struct sk_buff *skb) | |
1149 | { | |
1150 | struct iucv_message msg; | |
1da177e4 | 1151 | unsigned long saveflags; |
eebce385 MS |
1152 | struct ll_header header; |
1153 | int rc; | |
1da177e4 LT |
1154 | |
1155 | if (fsm_getstate(conn->fsm) != CONN_STATE_IDLE) { | |
1156 | int l = skb->len + NETIUCV_HDRLEN; | |
1157 | ||
1158 | spin_lock_irqsave(&conn->collect_lock, saveflags); | |
1159 | if (conn->collect_len + l > | |
1160 | (conn->max_buffsize - NETIUCV_HDRLEN)) { | |
1161 | rc = -EBUSY; | |
1162 | IUCV_DBF_TEXT(data, 2, | |
eebce385 | 1163 | "EBUSY from netiucv_transmit_skb\n"); |
1da177e4 | 1164 | } else { |
63354797 | 1165 | refcount_inc(&skb->users); |
1da177e4 LT |
1166 | skb_queue_tail(&conn->collect_queue, skb); |
1167 | conn->collect_len += l; | |
eebce385 | 1168 | rc = 0; |
1da177e4 LT |
1169 | } |
1170 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); | |
1171 | } else { | |
1172 | struct sk_buff *nskb = skb; | |
1173 | /** | |
1174 | * Copy the skb to a new allocated skb in lowmem only if the | |
1175 | * data is located above 2G in memory or tailroom is < 2. | |
1176 | */ | |
27a884dc ACM |
1177 | unsigned long hi = ((unsigned long)(skb_tail_pointer(skb) + |
1178 | NETIUCV_HDRLEN)) >> 31; | |
1da177e4 LT |
1179 | int copied = 0; |
1180 | if (hi || (skb_tailroom(skb) < 2)) { | |
1181 | nskb = alloc_skb(skb->len + NETIUCV_HDRLEN + | |
1182 | NETIUCV_HDRLEN, GFP_ATOMIC | GFP_DMA); | |
1183 | if (!nskb) { | |
1da177e4 LT |
1184 | IUCV_DBF_TEXT(data, 2, "alloc_skb failed\n"); |
1185 | rc = -ENOMEM; | |
1186 | return rc; | |
1187 | } else { | |
1188 | skb_reserve(nskb, NETIUCV_HDRLEN); | |
59ae1d12 | 1189 | skb_put_data(nskb, skb->data, skb->len); |
1da177e4 LT |
1190 | } |
1191 | copied = 1; | |
1192 | } | |
1193 | /** | |
1194 | * skb now is below 2G and has enough room. Add headers. | |
1195 | */ | |
1196 | header.next = nskb->len + NETIUCV_HDRLEN; | |
1197 | memcpy(skb_push(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
1198 | header.next = 0; | |
59ae1d12 | 1199 | skb_put_data(nskb, &header, NETIUCV_HDRLEN); |
1da177e4 LT |
1200 | |
1201 | fsm_newstate(conn->fsm, CONN_STATE_TX); | |
ee6edb97 | 1202 | conn->prof.send_stamp = jiffies; |
e82b0f2c | 1203 | |
eebce385 MS |
1204 | msg.tag = 1; |
1205 | msg.class = 0; | |
1206 | rc = iucv_message_send(conn->path, &msg, 0, 0, | |
1207 | nskb->data, nskb->len); | |
1da177e4 LT |
1208 | conn->prof.doios_single++; |
1209 | conn->prof.txlen += skb->len; | |
1210 | conn->prof.tx_pending++; | |
1211 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) | |
1212 | conn->prof.tx_max_pending = conn->prof.tx_pending; | |
1213 | if (rc) { | |
1214 | struct netiucv_priv *privptr; | |
1215 | fsm_newstate(conn->fsm, CONN_STATE_IDLE); | |
1216 | conn->prof.tx_pending--; | |
eebce385 | 1217 | privptr = netdev_priv(conn->netdev); |
1da177e4 LT |
1218 | if (privptr) |
1219 | privptr->stats.tx_errors++; | |
1220 | if (copied) | |
1221 | dev_kfree_skb(nskb); | |
1222 | else { | |
1223 | /** | |
1224 | * Remove our headers. They get added | |
1225 | * again on retransmit. | |
1226 | */ | |
1227 | skb_pull(skb, NETIUCV_HDRLEN); | |
1228 | skb_trim(skb, skb->len - NETIUCV_HDRLEN); | |
1229 | } | |
1da177e4 LT |
1230 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); |
1231 | } else { | |
1232 | if (copied) | |
1233 | dev_kfree_skb(skb); | |
63354797 | 1234 | refcount_inc(&nskb->users); |
1da177e4 LT |
1235 | skb_queue_tail(&conn->commit_queue, nskb); |
1236 | } | |
1237 | } | |
1238 | ||
1239 | return rc; | |
1240 | } | |
e82b0f2c | 1241 | |
eebce385 | 1242 | /* |
1da177e4 | 1243 | * Interface API for upper network layers |
eebce385 | 1244 | */ |
1da177e4 LT |
1245 | |
1246 | /** | |
1247 | * Open an interface. | |
1248 | * Called from generic network layer when ifconfig up is run. | |
1249 | * | |
1250 | * @param dev Pointer to interface struct. | |
1251 | * | |
1252 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1253 | */ | |
eebce385 MS |
1254 | static int netiucv_open(struct net_device *dev) |
1255 | { | |
1256 | struct netiucv_priv *priv = netdev_priv(dev); | |
1257 | ||
1258 | fsm_event(priv->fsm, DEV_EVENT_START, dev); | |
1da177e4 LT |
1259 | return 0; |
1260 | } | |
1261 | ||
1262 | /** | |
1263 | * Close an interface. | |
1264 | * Called from generic network layer when ifconfig down is run. | |
1265 | * | |
1266 | * @param dev Pointer to interface struct. | |
1267 | * | |
1268 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1269 | */ | |
eebce385 MS |
1270 | static int netiucv_close(struct net_device *dev) |
1271 | { | |
1272 | struct netiucv_priv *priv = netdev_priv(dev); | |
1273 | ||
1274 | fsm_event(priv->fsm, DEV_EVENT_STOP, dev); | |
1da177e4 LT |
1275 | return 0; |
1276 | } | |
1277 | ||
1175b257 UB |
1278 | static int netiucv_pm_prepare(struct device *dev) |
1279 | { | |
1280 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1281 | return 0; | |
1282 | } | |
1283 | ||
1284 | static void netiucv_pm_complete(struct device *dev) | |
1285 | { | |
1286 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1287 | return; | |
1288 | } | |
1289 | ||
1290 | /** | |
1291 | * netiucv_pm_freeze() - Freeze PM callback | |
1292 | * @dev: netiucv device | |
1293 | * | |
1294 | * close open netiucv interfaces | |
1295 | */ | |
1296 | static int netiucv_pm_freeze(struct device *dev) | |
1297 | { | |
4f0076f7 | 1298 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1175b257 UB |
1299 | struct net_device *ndev = NULL; |
1300 | int rc = 0; | |
1301 | ||
1302 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1303 | if (priv && priv->conn) | |
1304 | ndev = priv->conn->netdev; | |
1305 | if (!ndev) | |
1306 | goto out; | |
1307 | netif_device_detach(ndev); | |
1308 | priv->pm_state = fsm_getstate(priv->fsm); | |
1309 | rc = netiucv_close(ndev); | |
1310 | out: | |
1311 | return rc; | |
1312 | } | |
1313 | ||
1314 | /** | |
1315 | * netiucv_pm_restore_thaw() - Thaw and restore PM callback | |
1316 | * @dev: netiucv device | |
1317 | * | |
1318 | * re-open netiucv interfaces closed during freeze | |
1319 | */ | |
1320 | static int netiucv_pm_restore_thaw(struct device *dev) | |
1321 | { | |
4f0076f7 | 1322 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1175b257 UB |
1323 | struct net_device *ndev = NULL; |
1324 | int rc = 0; | |
1325 | ||
1326 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1327 | if (priv && priv->conn) | |
1328 | ndev = priv->conn->netdev; | |
1329 | if (!ndev) | |
1330 | goto out; | |
1331 | switch (priv->pm_state) { | |
1332 | case DEV_STATE_RUNNING: | |
1333 | case DEV_STATE_STARTWAIT: | |
1334 | rc = netiucv_open(ndev); | |
1335 | break; | |
1336 | default: | |
1337 | break; | |
1338 | } | |
1339 | netif_device_attach(ndev); | |
1340 | out: | |
1341 | return rc; | |
1342 | } | |
1343 | ||
1da177e4 LT |
1344 | /** |
1345 | * Start transmission of a packet. | |
1346 | * Called from generic network device layer. | |
1347 | * | |
1348 | * @param skb Pointer to buffer containing the packet. | |
1349 | * @param dev Pointer to interface struct. | |
1350 | * | |
1351 | * @return 0 if packet consumed, !0 if packet rejected. | |
1352 | * Note: If we return !0, then the packet is free'd by | |
1353 | * the generic network layer. | |
1354 | */ | |
1355 | static int netiucv_tx(struct sk_buff *skb, struct net_device *dev) | |
1356 | { | |
eebce385 MS |
1357 | struct netiucv_priv *privptr = netdev_priv(dev); |
1358 | int rc; | |
1da177e4 | 1359 | |
2a2cf6b1 | 1360 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1361 | /** |
1362 | * Some sanity checks ... | |
1363 | */ | |
1364 | if (skb == NULL) { | |
1da177e4 LT |
1365 | IUCV_DBF_TEXT(data, 2, "netiucv_tx: skb is NULL\n"); |
1366 | privptr->stats.tx_dropped++; | |
ec634fe3 | 1367 | return NETDEV_TX_OK; |
1da177e4 LT |
1368 | } |
1369 | if (skb_headroom(skb) < NETIUCV_HDRLEN) { | |
1da177e4 LT |
1370 | IUCV_DBF_TEXT(data, 2, |
1371 | "netiucv_tx: skb_headroom < NETIUCV_HDRLEN\n"); | |
1372 | dev_kfree_skb(skb); | |
1373 | privptr->stats.tx_dropped++; | |
ec634fe3 | 1374 | return NETDEV_TX_OK; |
1da177e4 LT |
1375 | } |
1376 | ||
1377 | /** | |
1378 | * If connection is not running, try to restart it | |
e82b0f2c | 1379 | * and throw away packet. |
1da177e4 LT |
1380 | */ |
1381 | if (fsm_getstate(privptr->fsm) != DEV_STATE_RUNNING) { | |
1da177e4 LT |
1382 | dev_kfree_skb(skb); |
1383 | privptr->stats.tx_dropped++; | |
1384 | privptr->stats.tx_errors++; | |
1385 | privptr->stats.tx_carrier_errors++; | |
ec634fe3 | 1386 | return NETDEV_TX_OK; |
1da177e4 LT |
1387 | } |
1388 | ||
1389 | if (netiucv_test_and_set_busy(dev)) { | |
1390 | IUCV_DBF_TEXT(data, 2, "EBUSY from netiucv_tx\n"); | |
4e584d66 | 1391 | return NETDEV_TX_BUSY; |
1da177e4 | 1392 | } |
860e9538 | 1393 | netif_trans_update(dev); |
5b548140 | 1394 | rc = netiucv_transmit_skb(privptr->conn, skb); |
1da177e4 | 1395 | netiucv_clear_busy(dev); |
5b548140 | 1396 | return rc ? NETDEV_TX_BUSY : NETDEV_TX_OK; |
1da177e4 LT |
1397 | } |
1398 | ||
1399 | /** | |
eebce385 MS |
1400 | * netiucv_stats |
1401 | * @dev: Pointer to interface struct. | |
1da177e4 | 1402 | * |
eebce385 | 1403 | * Returns interface statistics of a device. |
1da177e4 | 1404 | * |
eebce385 | 1405 | * Returns pointer to stats struct of this interface. |
1da177e4 | 1406 | */ |
eebce385 | 1407 | static struct net_device_stats *netiucv_stats (struct net_device * dev) |
1da177e4 | 1408 | { |
eebce385 MS |
1409 | struct netiucv_priv *priv = netdev_priv(dev); |
1410 | ||
2a2cf6b1 | 1411 | IUCV_DBF_TEXT(trace, 5, __func__); |
eebce385 | 1412 | return &priv->stats; |
1da177e4 LT |
1413 | } |
1414 | ||
eebce385 | 1415 | /* |
1da177e4 | 1416 | * attributes in sysfs |
eebce385 | 1417 | */ |
1da177e4 | 1418 | |
eebce385 MS |
1419 | static ssize_t user_show(struct device *dev, struct device_attribute *attr, |
1420 | char *buf) | |
1da177e4 | 1421 | { |
dff59b64 | 1422 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1423 | |
2a2cf6b1 | 1424 | IUCV_DBF_TEXT(trace, 5, __func__); |
08e3356c | 1425 | return sprintf(buf, "%s\n", netiucv_printuser(priv->conn)); |
1da177e4 LT |
1426 | } |
1427 | ||
08e3356c UB |
1428 | static int netiucv_check_user(const char *buf, size_t count, char *username, |
1429 | char *userdata) | |
1da177e4 | 1430 | { |
08e3356c UB |
1431 | const char *p; |
1432 | int i; | |
1da177e4 | 1433 | |
08e3356c UB |
1434 | p = strchr(buf, '.'); |
1435 | if ((p && ((count > 26) || | |
1436 | ((p - buf) > 8) || | |
1437 | (buf + count - p > 18))) || | |
1438 | (!p && (count > 9))) { | |
1439 | IUCV_DBF_TEXT(setup, 2, "conn_write: too long\n"); | |
1da177e4 LT |
1440 | return -EINVAL; |
1441 | } | |
1442 | ||
08e3356c UB |
1443 | for (i = 0, p = buf; i < 8 && *p && *p != '.'; i++, p++) { |
1444 | if (isalnum(*p) || *p == '$') { | |
1445 | username[i] = toupper(*p); | |
eebce385 MS |
1446 | continue; |
1447 | } | |
08e3356c | 1448 | if (*p == '\n') |
1da177e4 LT |
1449 | /* trailing lf, grr */ |
1450 | break; | |
eebce385 | 1451 | IUCV_DBF_TEXT_(setup, 2, |
08e3356c | 1452 | "conn_write: invalid character %02x\n", *p); |
eebce385 | 1453 | return -EINVAL; |
1da177e4 | 1454 | } |
eebce385 | 1455 | while (i < 8) |
1da177e4 | 1456 | username[i++] = ' '; |
16a83b30 | 1457 | username[8] = '\0'; |
1da177e4 | 1458 | |
08e3356c UB |
1459 | if (*p == '.') { |
1460 | p++; | |
1461 | for (i = 0; i < 16 && *p; i++, p++) { | |
1462 | if (*p == '\n') | |
1463 | break; | |
1464 | userdata[i] = toupper(*p); | |
1465 | } | |
1466 | while (i > 0 && i < 16) | |
1467 | userdata[i++] = ' '; | |
1468 | } else | |
1469 | memcpy(userdata, iucvMagic_ascii, 16); | |
1470 | userdata[16] = '\0'; | |
1471 | ASCEBC(userdata, 16); | |
1472 | ||
1473 | return 0; | |
1474 | } | |
1475 | ||
1476 | static ssize_t user_write(struct device *dev, struct device_attribute *attr, | |
1477 | const char *buf, size_t count) | |
1478 | { | |
1479 | struct netiucv_priv *priv = dev_get_drvdata(dev); | |
1480 | struct net_device *ndev = priv->conn->netdev; | |
1481 | char username[9]; | |
1482 | char userdata[17]; | |
1483 | int rc; | |
1484 | struct iucv_connection *cp; | |
1485 | ||
1486 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1487 | rc = netiucv_check_user(buf, count, username, userdata); | |
1488 | if (rc) | |
1489 | return rc; | |
1490 | ||
eebce385 MS |
1491 | if (memcmp(username, priv->conn->userid, 9) && |
1492 | (ndev->flags & (IFF_UP | IFF_RUNNING))) { | |
1493 | /* username changed while the interface is active. */ | |
eebce385 | 1494 | IUCV_DBF_TEXT(setup, 2, "user_write: device active\n"); |
f082bcae | 1495 | return -EPERM; |
eebce385 MS |
1496 | } |
1497 | read_lock_bh(&iucv_connection_rwlock); | |
1498 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
08e3356c UB |
1499 | if (!strncmp(username, cp->userid, 9) && |
1500 | !strncmp(userdata, cp->userdata, 17) && cp->netdev != ndev) { | |
eebce385 | 1501 | read_unlock_bh(&iucv_connection_rwlock); |
08e3356c UB |
1502 | IUCV_DBF_TEXT_(setup, 2, "user_write: Connection to %s " |
1503 | "already exists\n", netiucv_printuser(cp)); | |
eebce385 | 1504 | return -EEXIST; |
1da177e4 LT |
1505 | } |
1506 | } | |
eebce385 | 1507 | read_unlock_bh(&iucv_connection_rwlock); |
1da177e4 | 1508 | memcpy(priv->conn->userid, username, 9); |
08e3356c | 1509 | memcpy(priv->conn->userdata, userdata, 17); |
1da177e4 | 1510 | return count; |
1da177e4 LT |
1511 | } |
1512 | ||
1513 | static DEVICE_ATTR(user, 0644, user_show, user_write); | |
1514 | ||
eebce385 MS |
1515 | static ssize_t buffer_show (struct device *dev, struct device_attribute *attr, |
1516 | char *buf) | |
dff59b64 GKH |
1517 | { |
1518 | struct netiucv_priv *priv = dev_get_drvdata(dev); | |
1da177e4 | 1519 | |
2a2cf6b1 | 1520 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1521 | return sprintf(buf, "%d\n", priv->conn->max_buffsize); |
1522 | } | |
1523 | ||
eebce385 MS |
1524 | static ssize_t buffer_write (struct device *dev, struct device_attribute *attr, |
1525 | const char *buf, size_t count) | |
1da177e4 | 1526 | { |
dff59b64 | 1527 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1528 | struct net_device *ndev = priv->conn->netdev; |
9edebf11 UB |
1529 | unsigned int bs1; |
1530 | int rc; | |
1da177e4 | 1531 | |
2a2cf6b1 | 1532 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1533 | if (count >= 39) |
1534 | return -EINVAL; | |
1535 | ||
9edebf11 | 1536 | rc = kstrtouint(buf, 0, &bs1); |
1da177e4 | 1537 | |
9edebf11 UB |
1538 | if (rc == -EINVAL) { |
1539 | IUCV_DBF_TEXT_(setup, 2, "buffer_write: invalid char %s\n", | |
1540 | buf); | |
1da177e4 LT |
1541 | return -EINVAL; |
1542 | } | |
9edebf11 | 1543 | if ((rc == -ERANGE) || (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 | ||
0b945293 | 1793 | static const struct attribute_group *netiucv_attr_groups[] = { |
1794 | &netiucv_stat_attr_group, | |
1795 | &netiucv_attr_group, | |
1796 | NULL, | |
1797 | }; | |
1da177e4 | 1798 | |
eebce385 | 1799 | static int netiucv_register_device(struct net_device *ndev) |
1da177e4 | 1800 | { |
eebce385 | 1801 | struct netiucv_priv *priv = netdev_priv(ndev); |
88abaab4 | 1802 | struct device *dev = kzalloc(sizeof(struct device), GFP_KERNEL); |
1da177e4 LT |
1803 | int ret; |
1804 | ||
2a2cf6b1 | 1805 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1806 | |
1807 | if (dev) { | |
1bf5b285 | 1808 | dev_set_name(dev, "net%s", ndev->name); |
1da177e4 LT |
1809 | dev->bus = &iucv_bus; |
1810 | dev->parent = iucv_root; | |
0b945293 | 1811 | dev->groups = netiucv_attr_groups; |
1da177e4 LT |
1812 | /* |
1813 | * The release function could be called after the | |
1814 | * module has been unloaded. It's _only_ task is to | |
1815 | * free the struct. Therefore, we specify kfree() | |
1816 | * directly here. (Probably a little bit obfuscating | |
1817 | * but legitime ...). | |
1818 | */ | |
1819 | dev->release = (void (*)(struct device *))kfree; | |
1820 | dev->driver = &netiucv_driver; | |
1821 | } else | |
1822 | return -ENOMEM; | |
1823 | ||
1824 | ret = device_register(dev); | |
c6304933 SO |
1825 | if (ret) { |
1826 | put_device(dev); | |
1da177e4 | 1827 | return ret; |
c6304933 | 1828 | } |
1da177e4 | 1829 | priv->dev = dev; |
dff59b64 | 1830 | dev_set_drvdata(dev, priv); |
1da177e4 | 1831 | return 0; |
1da177e4 LT |
1832 | } |
1833 | ||
eebce385 | 1834 | static void netiucv_unregister_device(struct device *dev) |
1da177e4 | 1835 | { |
2a2cf6b1 | 1836 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1837 | device_unregister(dev); |
1838 | } | |
1839 | ||
1840 | /** | |
1841 | * Allocate and initialize a new connection structure. | |
1842 | * Add it to the list of netiucv connections; | |
1843 | */ | |
eebce385 | 1844 | static struct iucv_connection *netiucv_new_connection(struct net_device *dev, |
08e3356c UB |
1845 | char *username, |
1846 | char *userdata) | |
eebce385 MS |
1847 | { |
1848 | struct iucv_connection *conn; | |
1da177e4 | 1849 | |
eebce385 MS |
1850 | conn = kzalloc(sizeof(*conn), GFP_KERNEL); |
1851 | if (!conn) | |
1852 | goto out; | |
1853 | skb_queue_head_init(&conn->collect_queue); | |
1854 | skb_queue_head_init(&conn->commit_queue); | |
1855 | spin_lock_init(&conn->collect_lock); | |
1856 | conn->max_buffsize = NETIUCV_BUFSIZE_DEFAULT; | |
1857 | conn->netdev = dev; | |
1858 | ||
1859 | conn->rx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA); | |
1860 | if (!conn->rx_buff) | |
1861 | goto out_conn; | |
1862 | conn->tx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA); | |
1863 | if (!conn->tx_buff) | |
1864 | goto out_rx; | |
1865 | conn->fsm = init_fsm("netiucvconn", conn_state_names, | |
1866 | conn_event_names, NR_CONN_STATES, | |
1867 | NR_CONN_EVENTS, conn_fsm, CONN_FSM_LEN, | |
1868 | GFP_KERNEL); | |
1869 | if (!conn->fsm) | |
1870 | goto out_tx; | |
1871 | ||
1872 | fsm_settimer(conn->fsm, &conn->timer); | |
1873 | fsm_newstate(conn->fsm, CONN_STATE_INVALID); | |
1874 | ||
08e3356c UB |
1875 | if (userdata) |
1876 | memcpy(conn->userdata, userdata, 17); | |
eebce385 MS |
1877 | if (username) { |
1878 | memcpy(conn->userid, username, 9); | |
1879 | fsm_newstate(conn->fsm, CONN_STATE_STOPPED); | |
1da177e4 | 1880 | } |
eebce385 MS |
1881 | |
1882 | write_lock_bh(&iucv_connection_rwlock); | |
1883 | list_add_tail(&conn->list, &iucv_connection_list); | |
1884 | write_unlock_bh(&iucv_connection_rwlock); | |
1da177e4 | 1885 | return conn; |
eebce385 MS |
1886 | |
1887 | out_tx: | |
1888 | kfree_skb(conn->tx_buff); | |
1889 | out_rx: | |
1890 | kfree_skb(conn->rx_buff); | |
1891 | out_conn: | |
1892 | kfree(conn); | |
1893 | out: | |
1894 | return NULL; | |
1da177e4 LT |
1895 | } |
1896 | ||
1897 | /** | |
1898 | * Release a connection structure and remove it from the | |
1899 | * list of netiucv connections. | |
1900 | */ | |
eebce385 | 1901 | static void netiucv_remove_connection(struct iucv_connection *conn) |
1da177e4 | 1902 | { |
08e3356c | 1903 | |
2a2cf6b1 | 1904 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 MS |
1905 | write_lock_bh(&iucv_connection_rwlock); |
1906 | list_del_init(&conn->list); | |
1907 | write_unlock_bh(&iucv_connection_rwlock); | |
0be4acec UB |
1908 | fsm_deltimer(&conn->timer); |
1909 | netiucv_purge_skb_queue(&conn->collect_queue); | |
eebce385 | 1910 | if (conn->path) { |
08e3356c | 1911 | iucv_path_sever(conn->path, conn->userdata); |
eebce385 MS |
1912 | kfree(conn->path); |
1913 | conn->path = NULL; | |
1da177e4 | 1914 | } |
0be4acec | 1915 | netiucv_purge_skb_queue(&conn->commit_queue); |
eebce385 MS |
1916 | kfree_fsm(conn->fsm); |
1917 | kfree_skb(conn->rx_buff); | |
1918 | kfree_skb(conn->tx_buff); | |
1da177e4 LT |
1919 | } |
1920 | ||
1921 | /** | |
1922 | * Release everything of a net device. | |
1923 | */ | |
eebce385 | 1924 | static void netiucv_free_netdevice(struct net_device *dev) |
1da177e4 | 1925 | { |
eebce385 | 1926 | struct netiucv_priv *privptr = netdev_priv(dev); |
1da177e4 | 1927 | |
2a2cf6b1 | 1928 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1929 | |
1930 | if (!dev) | |
1931 | return; | |
1932 | ||
1da177e4 LT |
1933 | if (privptr) { |
1934 | if (privptr->conn) | |
1935 | netiucv_remove_connection(privptr->conn); | |
1936 | if (privptr->fsm) | |
1937 | kfree_fsm(privptr->fsm); | |
1938 | privptr->conn = NULL; privptr->fsm = NULL; | |
1939 | /* privptr gets freed by free_netdev() */ | |
1940 | } | |
1da177e4 LT |
1941 | } |
1942 | ||
1943 | /** | |
1944 | * Initialize a net device. (Called from kernel in alloc_netdev()) | |
1945 | */ | |
4edd73b5 FB |
1946 | static const struct net_device_ops netiucv_netdev_ops = { |
1947 | .ndo_open = netiucv_open, | |
1948 | .ndo_stop = netiucv_close, | |
1949 | .ndo_get_stats = netiucv_stats, | |
1950 | .ndo_start_xmit = netiucv_tx, | |
4edd73b5 FB |
1951 | }; |
1952 | ||
eebce385 | 1953 | static void netiucv_setup_netdevice(struct net_device *dev) |
1da177e4 | 1954 | { |
1da177e4 | 1955 | dev->mtu = NETIUCV_MTU_DEFAULT; |
46b3ef4c JW |
1956 | dev->min_mtu = 576; |
1957 | dev->max_mtu = NETIUCV_MTU_MAX; | |
cd1997f6 SR |
1958 | dev->needs_free_netdev = true; |
1959 | dev->priv_destructor = netiucv_free_netdevice; | |
1da177e4 LT |
1960 | dev->hard_header_len = NETIUCV_HDRLEN; |
1961 | dev->addr_len = 0; | |
1962 | dev->type = ARPHRD_SLIP; | |
1963 | dev->tx_queue_len = NETIUCV_QUEUELEN_DEFAULT; | |
1964 | dev->flags = IFF_POINTOPOINT | IFF_NOARP; | |
4edd73b5 | 1965 | dev->netdev_ops = &netiucv_netdev_ops; |
1da177e4 LT |
1966 | } |
1967 | ||
1968 | /** | |
1969 | * Allocate and initialize everything of a net device. | |
1970 | */ | |
08e3356c | 1971 | static struct net_device *netiucv_init_netdevice(char *username, char *userdata) |
1da177e4 LT |
1972 | { |
1973 | struct netiucv_priv *privptr; | |
1974 | struct net_device *dev; | |
1975 | ||
1976 | dev = alloc_netdev(sizeof(struct netiucv_priv), "iucv%d", | |
c835a677 | 1977 | NET_NAME_UNKNOWN, netiucv_setup_netdevice); |
1da177e4 LT |
1978 | if (!dev) |
1979 | return NULL; | |
aaf9522d | 1980 | rtnl_lock(); |
1d503563 UB |
1981 | if (dev_alloc_name(dev, dev->name) < 0) |
1982 | goto out_netdev; | |
1da177e4 | 1983 | |
eebce385 | 1984 | privptr = netdev_priv(dev); |
1da177e4 LT |
1985 | privptr->fsm = init_fsm("netiucvdev", dev_state_names, |
1986 | dev_event_names, NR_DEV_STATES, NR_DEV_EVENTS, | |
1987 | dev_fsm, DEV_FSM_LEN, GFP_KERNEL); | |
eebce385 MS |
1988 | if (!privptr->fsm) |
1989 | goto out_netdev; | |
1990 | ||
08e3356c | 1991 | privptr->conn = netiucv_new_connection(dev, username, userdata); |
1da177e4 | 1992 | if (!privptr->conn) { |
1da177e4 | 1993 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_new_connection\n"); |
eebce385 | 1994 | goto out_fsm; |
1da177e4 LT |
1995 | } |
1996 | fsm_newstate(privptr->fsm, DEV_STATE_STOPPED); | |
1da177e4 | 1997 | return dev; |
eebce385 MS |
1998 | |
1999 | out_fsm: | |
2000 | kfree_fsm(privptr->fsm); | |
2001 | out_netdev: | |
aaf9522d | 2002 | rtnl_unlock(); |
eebce385 MS |
2003 | free_netdev(dev); |
2004 | return NULL; | |
1da177e4 LT |
2005 | } |
2006 | ||
36369569 GKH |
2007 | static ssize_t connection_store(struct device_driver *drv, const char *buf, |
2008 | size_t count) | |
1da177e4 | 2009 | { |
16a83b30 | 2010 | char username[9]; |
08e3356c UB |
2011 | char userdata[17]; |
2012 | int rc; | |
1da177e4 | 2013 | struct net_device *dev; |
eebce385 MS |
2014 | struct netiucv_priv *priv; |
2015 | struct iucv_connection *cp; | |
1da177e4 | 2016 | |
2a2cf6b1 | 2017 | IUCV_DBF_TEXT(trace, 3, __func__); |
08e3356c UB |
2018 | rc = netiucv_check_user(buf, count, username, userdata); |
2019 | if (rc) | |
2020 | return rc; | |
16a83b30 | 2021 | |
eebce385 MS |
2022 | read_lock_bh(&iucv_connection_rwlock); |
2023 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
08e3356c UB |
2024 | if (!strncmp(username, cp->userid, 9) && |
2025 | !strncmp(userdata, cp->userdata, 17)) { | |
eebce385 | 2026 | read_unlock_bh(&iucv_connection_rwlock); |
08e3356c UB |
2027 | IUCV_DBF_TEXT_(setup, 2, "conn_write: Connection to %s " |
2028 | "already exists\n", netiucv_printuser(cp)); | |
eebce385 MS |
2029 | return -EEXIST; |
2030 | } | |
16a83b30 | 2031 | } |
eebce385 MS |
2032 | read_unlock_bh(&iucv_connection_rwlock); |
2033 | ||
08e3356c | 2034 | dev = netiucv_init_netdevice(username, userdata); |
1da177e4 | 2035 | if (!dev) { |
1da177e4 LT |
2036 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_init_netdevice\n"); |
2037 | return -ENODEV; | |
2038 | } | |
2039 | ||
eebce385 MS |
2040 | rc = netiucv_register_device(dev); |
2041 | if (rc) { | |
aaf9522d | 2042 | rtnl_unlock(); |
1da177e4 | 2043 | IUCV_DBF_TEXT_(setup, 2, |
eebce385 | 2044 | "ret %d from netiucv_register_device\n", rc); |
1da177e4 LT |
2045 | goto out_free_ndev; |
2046 | } | |
2047 | ||
2048 | /* sysfs magic */ | |
eebce385 MS |
2049 | priv = netdev_priv(dev); |
2050 | SET_NETDEV_DEV(dev, priv->dev); | |
1da177e4 | 2051 | |
aaf9522d BP |
2052 | rc = register_netdevice(dev); |
2053 | rtnl_unlock(); | |
eebce385 MS |
2054 | if (rc) |
2055 | goto out_unreg; | |
1da177e4 | 2056 | |
08e3356c UB |
2057 | dev_info(priv->dev, "The IUCV interface to %s has been established " |
2058 | "successfully\n", | |
2059 | netiucv_printuser(priv->conn)); | |
e82b0f2c | 2060 | |
1da177e4 LT |
2061 | return count; |
2062 | ||
eebce385 MS |
2063 | out_unreg: |
2064 | netiucv_unregister_device(priv->dev); | |
1da177e4 | 2065 | out_free_ndev: |
1da177e4 | 2066 | netiucv_free_netdevice(dev); |
eebce385 | 2067 | return rc; |
1da177e4 | 2068 | } |
36369569 | 2069 | static DRIVER_ATTR_WO(connection); |
1da177e4 | 2070 | |
36369569 GKH |
2071 | static ssize_t remove_store(struct device_driver *drv, const char *buf, |
2072 | size_t count) | |
1da177e4 | 2073 | { |
eebce385 | 2074 | struct iucv_connection *cp; |
1da177e4 LT |
2075 | struct net_device *ndev; |
2076 | struct netiucv_priv *priv; | |
2077 | struct device *dev; | |
2078 | char name[IFNAMSIZ]; | |
eebce385 | 2079 | const char *p; |
1da177e4 LT |
2080 | int i; |
2081 | ||
2a2cf6b1 | 2082 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
2083 | |
2084 | if (count >= IFNAMSIZ) | |
a419aef8 | 2085 | count = IFNAMSIZ - 1; |
1da177e4 | 2086 | |
eebce385 MS |
2087 | for (i = 0, p = buf; i < count && *p; i++, p++) { |
2088 | if (*p == '\n' || *p == ' ') | |
1da177e4 LT |
2089 | /* trailing lf, grr */ |
2090 | break; | |
eebce385 | 2091 | name[i] = *p; |
1da177e4 LT |
2092 | } |
2093 | name[i] = '\0'; | |
2094 | ||
eebce385 MS |
2095 | read_lock_bh(&iucv_connection_rwlock); |
2096 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
2097 | ndev = cp->netdev; | |
2098 | priv = netdev_priv(ndev); | |
1da177e4 | 2099 | dev = priv->dev; |
eebce385 MS |
2100 | if (strncmp(name, ndev->name, count)) |
2101 | continue; | |
2102 | read_unlock_bh(&iucv_connection_rwlock); | |
1da177e4 | 2103 | if (ndev->flags & (IFF_UP | IFF_RUNNING)) { |
8f7c502c UB |
2104 | dev_warn(dev, "The IUCV device is connected" |
2105 | " to %s and cannot be removed\n", | |
2106 | priv->conn->userid); | |
1da177e4 | 2107 | IUCV_DBF_TEXT(data, 2, "remove_write: still active\n"); |
f082bcae | 2108 | return -EPERM; |
1da177e4 LT |
2109 | } |
2110 | unregister_netdev(ndev); | |
2111 | netiucv_unregister_device(dev); | |
2112 | return count; | |
2113 | } | |
eebce385 | 2114 | read_unlock_bh(&iucv_connection_rwlock); |
1da177e4 LT |
2115 | IUCV_DBF_TEXT(data, 2, "remove_write: unknown device\n"); |
2116 | return -EINVAL; | |
2117 | } | |
36369569 | 2118 | static DRIVER_ATTR_WO(remove); |
1da177e4 | 2119 | |
eebce385 MS |
2120 | static struct attribute * netiucv_drv_attrs[] = { |
2121 | &driver_attr_connection.attr, | |
2122 | &driver_attr_remove.attr, | |
2123 | NULL, | |
2124 | }; | |
2125 | ||
2126 | static struct attribute_group netiucv_drv_attr_group = { | |
2127 | .attrs = netiucv_drv_attrs, | |
2128 | }; | |
2129 | ||
a4dbd674 | 2130 | static const struct attribute_group *netiucv_drv_attr_groups[] = { |
5b88feb1 CH |
2131 | &netiucv_drv_attr_group, |
2132 | NULL, | |
2133 | }; | |
2134 | ||
eebce385 | 2135 | static void netiucv_banner(void) |
1da177e4 | 2136 | { |
8f7c502c | 2137 | pr_info("driver initialized\n"); |
1da177e4 LT |
2138 | } |
2139 | ||
eebce385 | 2140 | static void __exit netiucv_exit(void) |
1da177e4 | 2141 | { |
eebce385 MS |
2142 | struct iucv_connection *cp; |
2143 | struct net_device *ndev; | |
2144 | struct netiucv_priv *priv; | |
2145 | struct device *dev; | |
2146 | ||
2a2cf6b1 | 2147 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 MS |
2148 | while (!list_empty(&iucv_connection_list)) { |
2149 | cp = list_entry(iucv_connection_list.next, | |
2150 | struct iucv_connection, list); | |
eebce385 MS |
2151 | ndev = cp->netdev; |
2152 | priv = netdev_priv(ndev); | |
2153 | dev = priv->dev; | |
1da177e4 LT |
2154 | |
2155 | unregister_netdev(ndev); | |
2156 | netiucv_unregister_device(dev); | |
2157 | } | |
2158 | ||
1175b257 | 2159 | device_unregister(netiucv_dev); |
1da177e4 | 2160 | driver_unregister(&netiucv_driver); |
eebce385 | 2161 | iucv_unregister(&netiucv_handler, 1); |
1da177e4 LT |
2162 | iucv_unregister_dbf_views(); |
2163 | ||
8f7c502c | 2164 | pr_info("driver unloaded\n"); |
1da177e4 LT |
2165 | return; |
2166 | } | |
2167 | ||
eebce385 | 2168 | static int __init netiucv_init(void) |
1da177e4 | 2169 | { |
eebce385 | 2170 | int rc; |
e82b0f2c | 2171 | |
eebce385 MS |
2172 | rc = iucv_register_dbf_views(); |
2173 | if (rc) | |
2174 | goto out; | |
2175 | rc = iucv_register(&netiucv_handler, 1); | |
2176 | if (rc) | |
2177 | goto out_dbf; | |
2a2cf6b1 | 2178 | IUCV_DBF_TEXT(trace, 3, __func__); |
0a0a8310 | 2179 | netiucv_driver.groups = netiucv_drv_attr_groups; |
eebce385 MS |
2180 | rc = driver_register(&netiucv_driver); |
2181 | if (rc) { | |
eebce385 MS |
2182 | IUCV_DBF_TEXT_(setup, 2, "ret %d from driver_register\n", rc); |
2183 | goto out_iucv; | |
1da177e4 | 2184 | } |
1175b257 UB |
2185 | /* establish dummy device */ |
2186 | netiucv_dev = kzalloc(sizeof(struct device), GFP_KERNEL); | |
2187 | if (!netiucv_dev) { | |
2188 | rc = -ENOMEM; | |
2189 | goto out_driver; | |
2190 | } | |
2191 | dev_set_name(netiucv_dev, "netiucv"); | |
2192 | netiucv_dev->bus = &iucv_bus; | |
2193 | netiucv_dev->parent = iucv_root; | |
2194 | netiucv_dev->release = (void (*)(struct device *))kfree; | |
2195 | netiucv_dev->driver = &netiucv_driver; | |
2196 | rc = device_register(netiucv_dev); | |
c6304933 SO |
2197 | if (rc) { |
2198 | put_device(netiucv_dev); | |
1175b257 | 2199 | goto out_driver; |
c6304933 | 2200 | } |
eebce385 MS |
2201 | netiucv_banner(); |
2202 | return rc; | |
2203 | ||
1175b257 UB |
2204 | out_driver: |
2205 | driver_unregister(&netiucv_driver); | |
eebce385 MS |
2206 | out_iucv: |
2207 | iucv_unregister(&netiucv_handler, 1); | |
2208 | out_dbf: | |
2209 | iucv_unregister_dbf_views(); | |
2210 | out: | |
2211 | return rc; | |
1da177e4 | 2212 | } |
e82b0f2c | 2213 | |
1da177e4 LT |
2214 | module_init(netiucv_init); |
2215 | module_exit(netiucv_exit); | |
2216 | MODULE_LICENSE("GPL"); |