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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> | |
7c0f6ba6 | 65 | #include <linux/uaccess.h> |
08e3356c | 66 | #include <asm/ebcdic.h> |
1da177e4 | 67 | |
eebce385 | 68 | #include <net/iucv/iucv.h> |
1da177e4 LT |
69 | #include "fsm.h" |
70 | ||
71 | MODULE_AUTHOR | |
72 | ("(C) 2001 IBM Corporation by Fritz Elfert (felfert@millenux.com)"); | |
73 | MODULE_DESCRIPTION ("Linux for S/390 IUCV network driver"); | |
74 | ||
eebce385 MS |
75 | /** |
76 | * Debug Facility stuff | |
77 | */ | |
78 | #define IUCV_DBF_SETUP_NAME "iucv_setup" | |
08e3356c | 79 | #define IUCV_DBF_SETUP_LEN 64 |
eebce385 MS |
80 | #define IUCV_DBF_SETUP_PAGES 2 |
81 | #define IUCV_DBF_SETUP_NR_AREAS 1 | |
82 | #define IUCV_DBF_SETUP_LEVEL 3 | |
83 | ||
84 | #define IUCV_DBF_DATA_NAME "iucv_data" | |
85 | #define IUCV_DBF_DATA_LEN 128 | |
86 | #define IUCV_DBF_DATA_PAGES 2 | |
87 | #define IUCV_DBF_DATA_NR_AREAS 1 | |
88 | #define IUCV_DBF_DATA_LEVEL 2 | |
89 | ||
90 | #define IUCV_DBF_TRACE_NAME "iucv_trace" | |
91 | #define IUCV_DBF_TRACE_LEN 16 | |
92 | #define IUCV_DBF_TRACE_PAGES 4 | |
93 | #define IUCV_DBF_TRACE_NR_AREAS 1 | |
94 | #define IUCV_DBF_TRACE_LEVEL 3 | |
95 | ||
96 | #define IUCV_DBF_TEXT(name,level,text) \ | |
97 | do { \ | |
98 | debug_text_event(iucv_dbf_##name,level,text); \ | |
99 | } while (0) | |
100 | ||
101 | #define IUCV_DBF_HEX(name,level,addr,len) \ | |
102 | do { \ | |
103 | debug_event(iucv_dbf_##name,level,(void*)(addr),len); \ | |
104 | } while (0) | |
105 | ||
106 | DECLARE_PER_CPU(char[256], iucv_dbf_txt_buf); | |
107 | ||
f33780d3 PT |
108 | #define IUCV_DBF_TEXT_(name, level, text...) \ |
109 | do { \ | |
8e6a8285 | 110 | if (debug_level_enabled(iucv_dbf_##name, level)) { \ |
390dfd95 TH |
111 | char* __buf = get_cpu_var(iucv_dbf_txt_buf); \ |
112 | sprintf(__buf, text); \ | |
113 | debug_text_event(iucv_dbf_##name, level, __buf); \ | |
f33780d3 PT |
114 | put_cpu_var(iucv_dbf_txt_buf); \ |
115 | } \ | |
eebce385 MS |
116 | } while (0) |
117 | ||
118 | #define IUCV_DBF_SPRINTF(name,level,text...) \ | |
119 | do { \ | |
120 | debug_sprintf_event(iucv_dbf_trace, level, ##text ); \ | |
121 | debug_sprintf_event(iucv_dbf_trace, level, text ); \ | |
122 | } while (0) | |
123 | ||
124 | /** | |
125 | * some more debug stuff | |
126 | */ | |
1da177e4 LT |
127 | #define PRINTK_HEADER " iucv: " /* for debugging */ |
128 | ||
1175b257 UB |
129 | /* dummy device to make sure netiucv_pm functions are called */ |
130 | static struct device *netiucv_dev; | |
131 | ||
132 | static int netiucv_pm_prepare(struct device *); | |
133 | static void netiucv_pm_complete(struct device *); | |
134 | static int netiucv_pm_freeze(struct device *); | |
135 | static int netiucv_pm_restore_thaw(struct device *); | |
136 | ||
47145210 | 137 | static const struct dev_pm_ops netiucv_pm_ops = { |
1175b257 UB |
138 | .prepare = netiucv_pm_prepare, |
139 | .complete = netiucv_pm_complete, | |
140 | .freeze = netiucv_pm_freeze, | |
141 | .thaw = netiucv_pm_restore_thaw, | |
142 | .restore = netiucv_pm_restore_thaw, | |
143 | }; | |
144 | ||
1da177e4 | 145 | static struct device_driver netiucv_driver = { |
2219510f | 146 | .owner = THIS_MODULE, |
1da177e4 LT |
147 | .name = "netiucv", |
148 | .bus = &iucv_bus, | |
1175b257 | 149 | .pm = &netiucv_pm_ops, |
1da177e4 LT |
150 | }; |
151 | ||
91e60eb6 UB |
152 | static int netiucv_callback_connreq(struct iucv_path *, u8 *, u8 *); |
153 | static void netiucv_callback_connack(struct iucv_path *, u8 *); | |
154 | static void netiucv_callback_connrej(struct iucv_path *, u8 *); | |
155 | static void netiucv_callback_connsusp(struct iucv_path *, u8 *); | |
156 | static void netiucv_callback_connres(struct iucv_path *, u8 *); | |
eebce385 MS |
157 | static void netiucv_callback_rx(struct iucv_path *, struct iucv_message *); |
158 | static void netiucv_callback_txdone(struct iucv_path *, struct iucv_message *); | |
159 | ||
160 | static struct iucv_handler netiucv_handler = { | |
161 | .path_pending = netiucv_callback_connreq, | |
162 | .path_complete = netiucv_callback_connack, | |
163 | .path_severed = netiucv_callback_connrej, | |
164 | .path_quiesced = netiucv_callback_connsusp, | |
165 | .path_resumed = netiucv_callback_connres, | |
166 | .message_pending = netiucv_callback_rx, | |
167 | .message_complete = netiucv_callback_txdone | |
168 | }; | |
169 | ||
1da177e4 LT |
170 | /** |
171 | * Per connection profiling data | |
172 | */ | |
173 | struct connection_profile { | |
174 | unsigned long maxmulti; | |
175 | unsigned long maxcqueue; | |
176 | unsigned long doios_single; | |
177 | unsigned long doios_multi; | |
178 | unsigned long txlen; | |
179 | unsigned long tx_time; | |
ee6edb97 | 180 | unsigned long send_stamp; |
1da177e4 LT |
181 | unsigned long tx_pending; |
182 | unsigned long tx_max_pending; | |
183 | }; | |
184 | ||
185 | /** | |
186 | * Representation of one iucv connection | |
187 | */ | |
188 | struct iucv_connection { | |
eebce385 MS |
189 | struct list_head list; |
190 | struct iucv_path *path; | |
1da177e4 LT |
191 | struct sk_buff *rx_buff; |
192 | struct sk_buff *tx_buff; | |
193 | struct sk_buff_head collect_queue; | |
194 | struct sk_buff_head commit_queue; | |
195 | spinlock_t collect_lock; | |
196 | int collect_len; | |
197 | int max_buffsize; | |
198 | fsm_timer timer; | |
199 | fsm_instance *fsm; | |
200 | struct net_device *netdev; | |
201 | struct connection_profile prof; | |
202 | char userid[9]; | |
08e3356c | 203 | char userdata[17]; |
1da177e4 LT |
204 | }; |
205 | ||
206 | /** | |
207 | * Linked list of all connection structs. | |
208 | */ | |
c11ca97e | 209 | static LIST_HEAD(iucv_connection_list); |
bfac0d0b | 210 | static DEFINE_RWLOCK(iucv_connection_rwlock); |
1da177e4 LT |
211 | |
212 | /** | |
213 | * Representation of event-data for the | |
214 | * connection state machine. | |
215 | */ | |
216 | struct iucv_event { | |
217 | struct iucv_connection *conn; | |
218 | void *data; | |
219 | }; | |
220 | ||
221 | /** | |
222 | * Private part of the network device structure | |
223 | */ | |
224 | struct netiucv_priv { | |
225 | struct net_device_stats stats; | |
226 | unsigned long tbusy; | |
227 | fsm_instance *fsm; | |
228 | struct iucv_connection *conn; | |
229 | struct device *dev; | |
1175b257 | 230 | int pm_state; |
1da177e4 LT |
231 | }; |
232 | ||
233 | /** | |
234 | * Link level header for a packet. | |
235 | */ | |
eebce385 MS |
236 | struct ll_header { |
237 | u16 next; | |
238 | }; | |
1da177e4 | 239 | |
eebce385 | 240 | #define NETIUCV_HDRLEN (sizeof(struct ll_header)) |
08e3356c | 241 | #define NETIUCV_BUFSIZE_MAX 65537 |
1da177e4 LT |
242 | #define NETIUCV_BUFSIZE_DEFAULT NETIUCV_BUFSIZE_MAX |
243 | #define NETIUCV_MTU_MAX (NETIUCV_BUFSIZE_MAX - NETIUCV_HDRLEN) | |
244 | #define NETIUCV_MTU_DEFAULT 9216 | |
245 | #define NETIUCV_QUEUELEN_DEFAULT 50 | |
246 | #define NETIUCV_TIMEOUT_5SEC 5000 | |
247 | ||
248 | /** | |
249 | * Compatibility macros for busy handling | |
250 | * of network devices. | |
251 | */ | |
eebce385 | 252 | static inline void netiucv_clear_busy(struct net_device *dev) |
1da177e4 | 253 | { |
eebce385 MS |
254 | struct netiucv_priv *priv = netdev_priv(dev); |
255 | clear_bit(0, &priv->tbusy); | |
1da177e4 LT |
256 | netif_wake_queue(dev); |
257 | } | |
258 | ||
eebce385 | 259 | static inline int netiucv_test_and_set_busy(struct net_device *dev) |
1da177e4 | 260 | { |
eebce385 | 261 | struct netiucv_priv *priv = netdev_priv(dev); |
1da177e4 | 262 | netif_stop_queue(dev); |
eebce385 | 263 | return test_and_set_bit(0, &priv->tbusy); |
1da177e4 LT |
264 | } |
265 | ||
08e3356c UB |
266 | static u8 iucvMagic_ascii[16] = { |
267 | 0x30, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, | |
268 | 0x30, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20 | |
269 | }; | |
270 | ||
271 | static u8 iucvMagic_ebcdic[16] = { | |
1da177e4 LT |
272 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, |
273 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40 | |
274 | }; | |
275 | ||
1da177e4 LT |
276 | /** |
277 | * Convert an iucv userId to its printable | |
278 | * form (strip whitespace at end). | |
279 | * | |
280 | * @param An iucv userId | |
281 | * | |
282 | * @returns The printable string (static data!!) | |
283 | */ | |
08e3356c | 284 | static char *netiucv_printname(char *name, int len) |
1da177e4 | 285 | { |
08e3356c | 286 | static char tmp[17]; |
1da177e4 | 287 | char *p = tmp; |
08e3356c UB |
288 | memcpy(tmp, name, len); |
289 | tmp[len] = '\0'; | |
290 | while (*p && ((p - tmp) < len) && (!isspace(*p))) | |
1da177e4 LT |
291 | p++; |
292 | *p = '\0'; | |
293 | return tmp; | |
294 | } | |
e82b0f2c | 295 | |
08e3356c UB |
296 | static char *netiucv_printuser(struct iucv_connection *conn) |
297 | { | |
298 | static char tmp_uid[9]; | |
299 | static char tmp_udat[17]; | |
300 | static char buf[100]; | |
301 | ||
302 | if (memcmp(conn->userdata, iucvMagic_ebcdic, 16)) { | |
303 | tmp_uid[8] = '\0'; | |
304 | tmp_udat[16] = '\0'; | |
baac7898 | 305 | memcpy(tmp_uid, netiucv_printname(conn->userid, 8), 8); |
08e3356c UB |
306 | memcpy(tmp_udat, conn->userdata, 16); |
307 | EBCASC(tmp_udat, 16); | |
308 | memcpy(tmp_udat, netiucv_printname(tmp_udat, 16), 16); | |
309 | sprintf(buf, "%s.%s", tmp_uid, tmp_udat); | |
310 | return buf; | |
311 | } else | |
312 | return netiucv_printname(conn->userid, 8); | |
313 | } | |
314 | ||
1da177e4 LT |
315 | /** |
316 | * States of the interface statemachine. | |
317 | */ | |
318 | enum dev_states { | |
319 | DEV_STATE_STOPPED, | |
320 | DEV_STATE_STARTWAIT, | |
321 | DEV_STATE_STOPWAIT, | |
322 | DEV_STATE_RUNNING, | |
323 | /** | |
324 | * MUST be always the last element!! | |
325 | */ | |
326 | NR_DEV_STATES | |
327 | }; | |
328 | ||
329 | static const char *dev_state_names[] = { | |
330 | "Stopped", | |
331 | "StartWait", | |
332 | "StopWait", | |
333 | "Running", | |
334 | }; | |
335 | ||
336 | /** | |
337 | * Events of the interface statemachine. | |
338 | */ | |
339 | enum dev_events { | |
340 | DEV_EVENT_START, | |
341 | DEV_EVENT_STOP, | |
342 | DEV_EVENT_CONUP, | |
343 | DEV_EVENT_CONDOWN, | |
344 | /** | |
345 | * MUST be always the last element!! | |
346 | */ | |
347 | NR_DEV_EVENTS | |
348 | }; | |
349 | ||
350 | static const char *dev_event_names[] = { | |
351 | "Start", | |
352 | "Stop", | |
353 | "Connection up", | |
354 | "Connection down", | |
355 | }; | |
e82b0f2c | 356 | |
1da177e4 LT |
357 | /** |
358 | * Events of the connection statemachine | |
359 | */ | |
360 | enum conn_events { | |
361 | /** | |
362 | * Events, representing callbacks from | |
363 | * lowlevel iucv layer) | |
364 | */ | |
365 | CONN_EVENT_CONN_REQ, | |
366 | CONN_EVENT_CONN_ACK, | |
367 | CONN_EVENT_CONN_REJ, | |
368 | CONN_EVENT_CONN_SUS, | |
369 | CONN_EVENT_CONN_RES, | |
370 | CONN_EVENT_RX, | |
371 | CONN_EVENT_TXDONE, | |
372 | ||
373 | /** | |
374 | * Events, representing errors return codes from | |
375 | * calls to lowlevel iucv layer | |
376 | */ | |
377 | ||
378 | /** | |
379 | * Event, representing timer expiry. | |
380 | */ | |
381 | CONN_EVENT_TIMER, | |
382 | ||
383 | /** | |
384 | * Events, representing commands from upper levels. | |
385 | */ | |
386 | CONN_EVENT_START, | |
387 | CONN_EVENT_STOP, | |
388 | ||
389 | /** | |
390 | * MUST be always the last element!! | |
391 | */ | |
392 | NR_CONN_EVENTS, | |
393 | }; | |
394 | ||
395 | static const char *conn_event_names[] = { | |
396 | "Remote connection request", | |
397 | "Remote connection acknowledge", | |
398 | "Remote connection reject", | |
399 | "Connection suspended", | |
400 | "Connection resumed", | |
401 | "Data received", | |
402 | "Data sent", | |
403 | ||
404 | "Timer", | |
405 | ||
406 | "Start", | |
407 | "Stop", | |
408 | }; | |
409 | ||
410 | /** | |
411 | * States of the connection statemachine. | |
412 | */ | |
413 | enum conn_states { | |
414 | /** | |
415 | * Connection not assigned to any device, | |
416 | * initial state, invalid | |
417 | */ | |
418 | CONN_STATE_INVALID, | |
419 | ||
420 | /** | |
421 | * Userid assigned but not operating | |
422 | */ | |
423 | CONN_STATE_STOPPED, | |
424 | ||
425 | /** | |
426 | * Connection registered, | |
427 | * no connection request sent yet, | |
428 | * no connection request received | |
429 | */ | |
430 | CONN_STATE_STARTWAIT, | |
431 | ||
432 | /** | |
433 | * Connection registered and connection request sent, | |
434 | * no acknowledge and no connection request received yet. | |
435 | */ | |
436 | CONN_STATE_SETUPWAIT, | |
437 | ||
438 | /** | |
439 | * Connection up and running idle | |
440 | */ | |
441 | CONN_STATE_IDLE, | |
442 | ||
443 | /** | |
444 | * Data sent, awaiting CONN_EVENT_TXDONE | |
445 | */ | |
446 | CONN_STATE_TX, | |
447 | ||
448 | /** | |
449 | * Error during registration. | |
450 | */ | |
451 | CONN_STATE_REGERR, | |
452 | ||
453 | /** | |
454 | * Error during registration. | |
455 | */ | |
456 | CONN_STATE_CONNERR, | |
457 | ||
458 | /** | |
459 | * MUST be always the last element!! | |
460 | */ | |
461 | NR_CONN_STATES, | |
462 | }; | |
463 | ||
464 | static const char *conn_state_names[] = { | |
465 | "Invalid", | |
466 | "Stopped", | |
467 | "StartWait", | |
468 | "SetupWait", | |
469 | "Idle", | |
470 | "TX", | |
471 | "Terminating", | |
472 | "Registration error", | |
473 | "Connect error", | |
474 | }; | |
475 | ||
e82b0f2c | 476 | |
1da177e4 LT |
477 | /** |
478 | * Debug Facility Stuff | |
479 | */ | |
480 | static debug_info_t *iucv_dbf_setup = NULL; | |
481 | static debug_info_t *iucv_dbf_data = NULL; | |
482 | static debug_info_t *iucv_dbf_trace = NULL; | |
483 | ||
484 | DEFINE_PER_CPU(char[256], iucv_dbf_txt_buf); | |
485 | ||
eebce385 | 486 | static void iucv_unregister_dbf_views(void) |
1da177e4 | 487 | { |
b646c08e ME |
488 | debug_unregister(iucv_dbf_setup); |
489 | debug_unregister(iucv_dbf_data); | |
490 | debug_unregister(iucv_dbf_trace); | |
1da177e4 | 491 | } |
eebce385 | 492 | static int iucv_register_dbf_views(void) |
1da177e4 LT |
493 | { |
494 | iucv_dbf_setup = debug_register(IUCV_DBF_SETUP_NAME, | |
66a464db | 495 | IUCV_DBF_SETUP_PAGES, |
1da177e4 LT |
496 | IUCV_DBF_SETUP_NR_AREAS, |
497 | IUCV_DBF_SETUP_LEN); | |
498 | iucv_dbf_data = debug_register(IUCV_DBF_DATA_NAME, | |
66a464db | 499 | IUCV_DBF_DATA_PAGES, |
1da177e4 LT |
500 | IUCV_DBF_DATA_NR_AREAS, |
501 | IUCV_DBF_DATA_LEN); | |
502 | iucv_dbf_trace = debug_register(IUCV_DBF_TRACE_NAME, | |
66a464db | 503 | IUCV_DBF_TRACE_PAGES, |
1da177e4 LT |
504 | IUCV_DBF_TRACE_NR_AREAS, |
505 | IUCV_DBF_TRACE_LEN); | |
506 | ||
507 | if ((iucv_dbf_setup == NULL) || (iucv_dbf_data == NULL) || | |
508 | (iucv_dbf_trace == NULL)) { | |
509 | iucv_unregister_dbf_views(); | |
510 | return -ENOMEM; | |
511 | } | |
512 | debug_register_view(iucv_dbf_setup, &debug_hex_ascii_view); | |
513 | debug_set_level(iucv_dbf_setup, IUCV_DBF_SETUP_LEVEL); | |
514 | ||
515 | debug_register_view(iucv_dbf_data, &debug_hex_ascii_view); | |
516 | debug_set_level(iucv_dbf_data, IUCV_DBF_DATA_LEVEL); | |
517 | ||
518 | debug_register_view(iucv_dbf_trace, &debug_hex_ascii_view); | |
519 | debug_set_level(iucv_dbf_trace, IUCV_DBF_TRACE_LEVEL); | |
520 | ||
521 | return 0; | |
522 | } | |
523 | ||
eebce385 | 524 | /* |
1da177e4 | 525 | * Callback-wrappers, called from lowlevel iucv layer. |
eebce385 | 526 | */ |
1da177e4 | 527 | |
eebce385 MS |
528 | static void netiucv_callback_rx(struct iucv_path *path, |
529 | struct iucv_message *msg) | |
1da177e4 | 530 | { |
eebce385 | 531 | struct iucv_connection *conn = path->private; |
1da177e4 LT |
532 | struct iucv_event ev; |
533 | ||
534 | ev.conn = conn; | |
eebce385 | 535 | ev.data = msg; |
1da177e4 LT |
536 | fsm_event(conn->fsm, CONN_EVENT_RX, &ev); |
537 | } | |
538 | ||
eebce385 MS |
539 | static void netiucv_callback_txdone(struct iucv_path *path, |
540 | struct iucv_message *msg) | |
1da177e4 | 541 | { |
eebce385 | 542 | struct iucv_connection *conn = path->private; |
1da177e4 LT |
543 | struct iucv_event ev; |
544 | ||
545 | ev.conn = conn; | |
eebce385 | 546 | ev.data = msg; |
1da177e4 LT |
547 | fsm_event(conn->fsm, CONN_EVENT_TXDONE, &ev); |
548 | } | |
549 | ||
eebce385 | 550 | static void netiucv_callback_connack(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 551 | { |
eebce385 | 552 | struct iucv_connection *conn = path->private; |
1da177e4 | 553 | |
eebce385 | 554 | fsm_event(conn->fsm, CONN_EVENT_CONN_ACK, conn); |
1da177e4 LT |
555 | } |
556 | ||
91e60eb6 UB |
557 | static int netiucv_callback_connreq(struct iucv_path *path, u8 *ipvmid, |
558 | u8 *ipuser) | |
1da177e4 | 559 | { |
eebce385 | 560 | struct iucv_connection *conn = path->private; |
1da177e4 | 561 | struct iucv_event ev; |
08e3356c UB |
562 | static char tmp_user[9]; |
563 | static char tmp_udat[17]; | |
eebce385 | 564 | int rc; |
1da177e4 | 565 | |
eebce385 | 566 | rc = -EINVAL; |
08e3356c UB |
567 | memcpy(tmp_user, netiucv_printname(ipvmid, 8), 8); |
568 | memcpy(tmp_udat, ipuser, 16); | |
569 | EBCASC(tmp_udat, 16); | |
eebce385 MS |
570 | read_lock_bh(&iucv_connection_rwlock); |
571 | list_for_each_entry(conn, &iucv_connection_list, list) { | |
08e3356c UB |
572 | if (strncmp(ipvmid, conn->userid, 8) || |
573 | strncmp(ipuser, conn->userdata, 16)) | |
eebce385 MS |
574 | continue; |
575 | /* Found a matching connection for this path. */ | |
576 | conn->path = path; | |
577 | ev.conn = conn; | |
578 | ev.data = path; | |
579 | fsm_event(conn->fsm, CONN_EVENT_CONN_REQ, &ev); | |
580 | rc = 0; | |
581 | } | |
08e3356c UB |
582 | IUCV_DBF_TEXT_(setup, 2, "Connection requested for %s.%s\n", |
583 | tmp_user, netiucv_printname(tmp_udat, 16)); | |
eebce385 MS |
584 | read_unlock_bh(&iucv_connection_rwlock); |
585 | return rc; | |
1da177e4 LT |
586 | } |
587 | ||
91e60eb6 | 588 | static void netiucv_callback_connrej(struct iucv_path *path, u8 *ipuser) |
1da177e4 | 589 | { |
eebce385 | 590 | struct iucv_connection *conn = path->private; |
1da177e4 | 591 | |
eebce385 | 592 | fsm_event(conn->fsm, CONN_EVENT_CONN_REJ, conn); |
1da177e4 LT |
593 | } |
594 | ||
91e60eb6 | 595 | static void netiucv_callback_connsusp(struct iucv_path *path, u8 *ipuser) |
1da177e4 | 596 | { |
eebce385 | 597 | struct iucv_connection *conn = path->private; |
1da177e4 | 598 | |
eebce385 | 599 | fsm_event(conn->fsm, CONN_EVENT_CONN_SUS, conn); |
1da177e4 LT |
600 | } |
601 | ||
91e60eb6 | 602 | static void netiucv_callback_connres(struct iucv_path *path, u8 *ipuser) |
1da177e4 | 603 | { |
eebce385 | 604 | struct iucv_connection *conn = path->private; |
1da177e4 | 605 | |
eebce385 MS |
606 | fsm_event(conn->fsm, CONN_EVENT_CONN_RES, conn); |
607 | } | |
1da177e4 LT |
608 | |
609 | /** | |
21b26f2f | 610 | * NOP action for statemachines |
1da177e4 | 611 | */ |
21b26f2f | 612 | static void netiucv_action_nop(fsm_instance *fi, int event, void *arg) |
1da177e4 LT |
613 | { |
614 | } | |
e82b0f2c | 615 | |
eebce385 | 616 | /* |
1da177e4 | 617 | * Actions of the connection statemachine |
eebce385 | 618 | */ |
1da177e4 LT |
619 | |
620 | /** | |
eebce385 MS |
621 | * netiucv_unpack_skb |
622 | * @conn: The connection where this skb has been received. | |
623 | * @pskb: The received skb. | |
1da177e4 | 624 | * |
eebce385 MS |
625 | * Unpack a just received skb and hand it over to upper layers. |
626 | * Helper function for conn_action_rx. | |
1da177e4 | 627 | */ |
eebce385 MS |
628 | static void netiucv_unpack_skb(struct iucv_connection *conn, |
629 | struct sk_buff *pskb) | |
1da177e4 LT |
630 | { |
631 | struct net_device *dev = conn->netdev; | |
eebce385 MS |
632 | struct netiucv_priv *privptr = netdev_priv(dev); |
633 | u16 offset = 0; | |
1da177e4 LT |
634 | |
635 | skb_put(pskb, NETIUCV_HDRLEN); | |
636 | pskb->dev = dev; | |
637 | pskb->ip_summed = CHECKSUM_NONE; | |
6c37c60c | 638 | pskb->protocol = cpu_to_be16(ETH_P_IP); |
1da177e4 LT |
639 | |
640 | while (1) { | |
641 | struct sk_buff *skb; | |
eebce385 | 642 | struct ll_header *header = (struct ll_header *) pskb->data; |
1da177e4 LT |
643 | |
644 | if (!header->next) | |
645 | break; | |
646 | ||
647 | skb_pull(pskb, NETIUCV_HDRLEN); | |
648 | header->next -= offset; | |
649 | offset += header->next; | |
650 | header->next -= NETIUCV_HDRLEN; | |
651 | if (skb_tailroom(pskb) < header->next) { | |
1da177e4 LT |
652 | IUCV_DBF_TEXT_(data, 2, "Illegal next field: %d > %d\n", |
653 | header->next, skb_tailroom(pskb)); | |
654 | return; | |
655 | } | |
656 | skb_put(pskb, header->next); | |
459a98ed | 657 | skb_reset_mac_header(pskb); |
1da177e4 LT |
658 | skb = dev_alloc_skb(pskb->len); |
659 | if (!skb) { | |
1da177e4 LT |
660 | IUCV_DBF_TEXT(data, 2, |
661 | "Out of memory in netiucv_unpack_skb\n"); | |
662 | privptr->stats.rx_dropped++; | |
663 | return; | |
664 | } | |
d626f62b ACM |
665 | skb_copy_from_linear_data(pskb, skb_put(skb, pskb->len), |
666 | pskb->len); | |
459a98ed | 667 | skb_reset_mac_header(skb); |
1da177e4 LT |
668 | skb->dev = pskb->dev; |
669 | skb->protocol = pskb->protocol; | |
670 | pskb->ip_summed = CHECKSUM_UNNECESSARY; | |
9b3efc01 JL |
671 | privptr->stats.rx_packets++; |
672 | privptr->stats.rx_bytes += skb->len; | |
1da177e4 LT |
673 | /* |
674 | * Since receiving is always initiated from a tasklet (in iucv.c), | |
675 | * we must use netif_rx_ni() instead of netif_rx() | |
676 | */ | |
677 | netif_rx_ni(skb); | |
1da177e4 LT |
678 | skb_pull(pskb, header->next); |
679 | skb_put(pskb, NETIUCV_HDRLEN); | |
680 | } | |
681 | } | |
682 | ||
eebce385 | 683 | static void conn_action_rx(fsm_instance *fi, int event, void *arg) |
1da177e4 | 684 | { |
eebce385 | 685 | struct iucv_event *ev = arg; |
1da177e4 | 686 | struct iucv_connection *conn = ev->conn; |
eebce385 MS |
687 | struct iucv_message *msg = ev->data; |
688 | struct netiucv_priv *privptr = netdev_priv(conn->netdev); | |
1da177e4 LT |
689 | int rc; |
690 | ||
2a2cf6b1 | 691 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
692 | |
693 | if (!conn->netdev) { | |
eebce385 | 694 | iucv_message_reject(conn->path, msg); |
1da177e4 | 695 | IUCV_DBF_TEXT(data, 2, |
eebce385 | 696 | "Received data for unlinked connection\n"); |
1da177e4 LT |
697 | return; |
698 | } | |
eebce385 MS |
699 | if (msg->length > conn->max_buffsize) { |
700 | iucv_message_reject(conn->path, msg); | |
1da177e4 | 701 | privptr->stats.rx_dropped++; |
1da177e4 | 702 | IUCV_DBF_TEXT_(data, 2, "msglen %d > max_buffsize %d\n", |
eebce385 | 703 | msg->length, conn->max_buffsize); |
1da177e4 LT |
704 | return; |
705 | } | |
27a884dc ACM |
706 | conn->rx_buff->data = conn->rx_buff->head; |
707 | skb_reset_tail_pointer(conn->rx_buff); | |
1da177e4 | 708 | conn->rx_buff->len = 0; |
eebce385 MS |
709 | rc = iucv_message_receive(conn->path, msg, 0, conn->rx_buff->data, |
710 | msg->length, NULL); | |
711 | if (rc || msg->length < 5) { | |
1da177e4 | 712 | privptr->stats.rx_errors++; |
1da177e4 LT |
713 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_receive\n", rc); |
714 | return; | |
715 | } | |
716 | netiucv_unpack_skb(conn, conn->rx_buff); | |
717 | } | |
718 | ||
eebce385 | 719 | static void conn_action_txdone(fsm_instance *fi, int event, void *arg) |
1da177e4 | 720 | { |
eebce385 | 721 | struct iucv_event *ev = arg; |
1da177e4 | 722 | struct iucv_connection *conn = ev->conn; |
eebce385 MS |
723 | struct iucv_message *msg = ev->data; |
724 | struct iucv_message txmsg; | |
1da177e4 | 725 | struct netiucv_priv *privptr = NULL; |
eebce385 MS |
726 | u32 single_flag = msg->tag; |
727 | u32 txbytes = 0; | |
728 | u32 txpackets = 0; | |
729 | u32 stat_maxcq = 0; | |
1da177e4 LT |
730 | struct sk_buff *skb; |
731 | unsigned long saveflags; | |
eebce385 MS |
732 | struct ll_header header; |
733 | int rc; | |
1da177e4 | 734 | |
2a2cf6b1 | 735 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 | 736 | |
d239ae33 UB |
737 | if (!conn || !conn->netdev) { |
738 | IUCV_DBF_TEXT(data, 2, | |
739 | "Send confirmation for unlinked connection\n"); | |
740 | return; | |
741 | } | |
742 | privptr = netdev_priv(conn->netdev); | |
1da177e4 LT |
743 | conn->prof.tx_pending--; |
744 | if (single_flag) { | |
745 | if ((skb = skb_dequeue(&conn->commit_queue))) { | |
63354797 | 746 | refcount_dec(&skb->users); |
1da177e4 LT |
747 | if (privptr) { |
748 | privptr->stats.tx_packets++; | |
749 | privptr->stats.tx_bytes += | |
750 | (skb->len - NETIUCV_HDRLEN | |
998221c2 | 751 | - NETIUCV_HDRLEN); |
1da177e4 | 752 | } |
998221c2 | 753 | dev_kfree_skb_any(skb); |
1da177e4 LT |
754 | } |
755 | } | |
27a884dc ACM |
756 | conn->tx_buff->data = conn->tx_buff->head; |
757 | skb_reset_tail_pointer(conn->tx_buff); | |
1da177e4 LT |
758 | conn->tx_buff->len = 0; |
759 | spin_lock_irqsave(&conn->collect_lock, saveflags); | |
760 | while ((skb = skb_dequeue(&conn->collect_queue))) { | |
761 | header.next = conn->tx_buff->len + skb->len + NETIUCV_HDRLEN; | |
59ae1d12 | 762 | skb_put_data(conn->tx_buff, &header, NETIUCV_HDRLEN); |
d626f62b ACM |
763 | skb_copy_from_linear_data(skb, |
764 | skb_put(conn->tx_buff, skb->len), | |
765 | skb->len); | |
1da177e4 LT |
766 | txbytes += skb->len; |
767 | txpackets++; | |
768 | stat_maxcq++; | |
63354797 | 769 | refcount_dec(&skb->users); |
1da177e4 LT |
770 | dev_kfree_skb_any(skb); |
771 | } | |
772 | if (conn->collect_len > conn->prof.maxmulti) | |
773 | conn->prof.maxmulti = conn->collect_len; | |
774 | conn->collect_len = 0; | |
775 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); | |
eebce385 MS |
776 | if (conn->tx_buff->len == 0) { |
777 | fsm_newstate(fi, CONN_STATE_IDLE); | |
778 | return; | |
779 | } | |
1da177e4 | 780 | |
eebce385 | 781 | header.next = 0; |
59ae1d12 | 782 | skb_put_data(conn->tx_buff, &header, NETIUCV_HDRLEN); |
ee6edb97 | 783 | conn->prof.send_stamp = jiffies; |
eebce385 MS |
784 | txmsg.class = 0; |
785 | txmsg.tag = 0; | |
786 | rc = iucv_message_send(conn->path, &txmsg, 0, 0, | |
1da177e4 | 787 | conn->tx_buff->data, conn->tx_buff->len); |
eebce385 MS |
788 | conn->prof.doios_multi++; |
789 | conn->prof.txlen += conn->tx_buff->len; | |
790 | conn->prof.tx_pending++; | |
791 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) | |
792 | conn->prof.tx_max_pending = conn->prof.tx_pending; | |
793 | if (rc) { | |
794 | conn->prof.tx_pending--; | |
1da177e4 | 795 | fsm_newstate(fi, CONN_STATE_IDLE); |
eebce385 MS |
796 | if (privptr) |
797 | privptr->stats.tx_errors += txpackets; | |
eebce385 MS |
798 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); |
799 | } else { | |
800 | if (privptr) { | |
801 | privptr->stats.tx_packets += txpackets; | |
802 | privptr->stats.tx_bytes += txbytes; | |
803 | } | |
804 | if (stat_maxcq > conn->prof.maxcqueue) | |
805 | conn->prof.maxcqueue = stat_maxcq; | |
806 | } | |
1da177e4 LT |
807 | } |
808 | ||
eebce385 | 809 | static void conn_action_connaccept(fsm_instance *fi, int event, void *arg) |
1da177e4 | 810 | { |
eebce385 | 811 | struct iucv_event *ev = arg; |
1da177e4 | 812 | struct iucv_connection *conn = ev->conn; |
eebce385 | 813 | struct iucv_path *path = ev->data; |
1da177e4 | 814 | struct net_device *netdev = conn->netdev; |
eebce385 | 815 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 816 | int rc; |
1da177e4 | 817 | |
2a2cf6b1 | 818 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 819 | |
eebce385 MS |
820 | conn->path = path; |
821 | path->msglim = NETIUCV_QUEUELEN_DEFAULT; | |
822 | path->flags = 0; | |
08e3356c | 823 | rc = iucv_path_accept(path, &netiucv_handler, conn->userdata , conn); |
1da177e4 | 824 | if (rc) { |
1da177e4 LT |
825 | IUCV_DBF_TEXT_(setup, 2, "rc %d from iucv_accept", rc); |
826 | return; | |
827 | } | |
828 | fsm_newstate(fi, CONN_STATE_IDLE); | |
eebce385 | 829 | netdev->tx_queue_len = conn->path->msglim; |
1da177e4 LT |
830 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); |
831 | } | |
832 | ||
eebce385 | 833 | static void conn_action_connreject(fsm_instance *fi, int event, void *arg) |
1da177e4 | 834 | { |
eebce385 MS |
835 | struct iucv_event *ev = arg; |
836 | struct iucv_path *path = ev->data; | |
1da177e4 | 837 | |
2a2cf6b1 | 838 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 | 839 | iucv_path_sever(path, NULL); |
1da177e4 LT |
840 | } |
841 | ||
eebce385 | 842 | static void conn_action_connack(fsm_instance *fi, int event, void *arg) |
1da177e4 | 843 | { |
eebce385 | 844 | struct iucv_connection *conn = arg; |
1da177e4 | 845 | struct net_device *netdev = conn->netdev; |
eebce385 | 846 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 847 | |
2a2cf6b1 | 848 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
849 | fsm_deltimer(&conn->timer); |
850 | fsm_newstate(fi, CONN_STATE_IDLE); | |
eebce385 | 851 | netdev->tx_queue_len = conn->path->msglim; |
1da177e4 LT |
852 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); |
853 | } | |
854 | ||
eebce385 | 855 | static void conn_action_conntimsev(fsm_instance *fi, int event, void *arg) |
1da177e4 | 856 | { |
eebce385 | 857 | struct iucv_connection *conn = arg; |
1da177e4 | 858 | |
2a2cf6b1 | 859 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 860 | fsm_deltimer(&conn->timer); |
08e3356c | 861 | iucv_path_sever(conn->path, conn->userdata); |
1da177e4 LT |
862 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
863 | } | |
864 | ||
eebce385 | 865 | static void conn_action_connsever(fsm_instance *fi, int event, void *arg) |
1da177e4 | 866 | { |
eebce385 | 867 | struct iucv_connection *conn = arg; |
1da177e4 | 868 | struct net_device *netdev = conn->netdev; |
eebce385 | 869 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 870 | |
2a2cf6b1 | 871 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
872 | |
873 | fsm_deltimer(&conn->timer); | |
08e3356c UB |
874 | iucv_path_sever(conn->path, conn->userdata); |
875 | dev_info(privptr->dev, "The peer z/VM guest %s has closed the " | |
876 | "connection\n", netiucv_printuser(conn)); | |
1da177e4 | 877 | IUCV_DBF_TEXT(data, 2, |
eebce385 | 878 | "conn_action_connsever: Remote dropped connection\n"); |
1da177e4 LT |
879 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
880 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); | |
881 | } | |
882 | ||
eebce385 | 883 | static void conn_action_start(fsm_instance *fi, int event, void *arg) |
1da177e4 | 884 | { |
eebce385 | 885 | struct iucv_connection *conn = arg; |
8f7c502c UB |
886 | struct net_device *netdev = conn->netdev; |
887 | struct netiucv_priv *privptr = netdev_priv(netdev); | |
1da177e4 LT |
888 | int rc; |
889 | ||
2a2cf6b1 | 890 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 891 | |
eebce385 | 892 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
1da177e4 | 893 | |
eebce385 MS |
894 | /* |
895 | * We must set the state before calling iucv_connect because the | |
896 | * callback handler could be called at any point after the connection | |
897 | * request is sent | |
898 | */ | |
1da177e4 LT |
899 | |
900 | fsm_newstate(fi, CONN_STATE_SETUPWAIT); | |
eebce385 | 901 | conn->path = iucv_path_alloc(NETIUCV_QUEUELEN_DEFAULT, 0, GFP_KERNEL); |
08e3356c UB |
902 | IUCV_DBF_TEXT_(setup, 2, "%s: connecting to %s ...\n", |
903 | netdev->name, netiucv_printuser(conn)); | |
904 | ||
eebce385 | 905 | rc = iucv_path_connect(conn->path, &netiucv_handler, conn->userid, |
08e3356c | 906 | NULL, conn->userdata, conn); |
1da177e4 | 907 | switch (rc) { |
eebce385 | 908 | case 0: |
8f7c502c | 909 | netdev->tx_queue_len = conn->path->msglim; |
eebce385 MS |
910 | fsm_addtimer(&conn->timer, NETIUCV_TIMEOUT_5SEC, |
911 | CONN_EVENT_TIMER, conn); | |
912 | return; | |
913 | case 11: | |
8f7c502c UB |
914 | dev_warn(privptr->dev, |
915 | "The IUCV device failed to connect to z/VM guest %s\n", | |
08e3356c | 916 | netiucv_printname(conn->userid, 8)); |
eebce385 MS |
917 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
918 | break; | |
919 | case 12: | |
8f7c502c UB |
920 | dev_warn(privptr->dev, |
921 | "The IUCV device failed to connect to the peer on z/VM" | |
08e3356c | 922 | " guest %s\n", netiucv_printname(conn->userid, 8)); |
eebce385 MS |
923 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
924 | break; | |
925 | case 13: | |
8f7c502c UB |
926 | dev_err(privptr->dev, |
927 | "Connecting the IUCV device would exceed the maximum" | |
928 | " number of IUCV connections\n"); | |
eebce385 MS |
929 | fsm_newstate(fi, CONN_STATE_CONNERR); |
930 | break; | |
931 | case 14: | |
8f7c502c UB |
932 | dev_err(privptr->dev, |
933 | "z/VM guest %s has too many IUCV connections" | |
934 | " to connect with the IUCV device\n", | |
08e3356c | 935 | netiucv_printname(conn->userid, 8)); |
eebce385 MS |
936 | fsm_newstate(fi, CONN_STATE_CONNERR); |
937 | break; | |
938 | case 15: | |
8f7c502c UB |
939 | dev_err(privptr->dev, |
940 | "The IUCV device cannot connect to a z/VM guest with no" | |
941 | " IUCV authorization\n"); | |
eebce385 MS |
942 | fsm_newstate(fi, CONN_STATE_CONNERR); |
943 | break; | |
944 | default: | |
8f7c502c UB |
945 | dev_err(privptr->dev, |
946 | "Connecting the IUCV device failed with error %d\n", | |
947 | rc); | |
eebce385 MS |
948 | fsm_newstate(fi, CONN_STATE_CONNERR); |
949 | break; | |
1da177e4 LT |
950 | } |
951 | IUCV_DBF_TEXT_(setup, 5, "iucv_connect rc is %d\n", rc); | |
eebce385 MS |
952 | kfree(conn->path); |
953 | conn->path = NULL; | |
1da177e4 LT |
954 | } |
955 | ||
eebce385 | 956 | static void netiucv_purge_skb_queue(struct sk_buff_head *q) |
1da177e4 LT |
957 | { |
958 | struct sk_buff *skb; | |
959 | ||
960 | while ((skb = skb_dequeue(q))) { | |
63354797 | 961 | refcount_dec(&skb->users); |
1da177e4 LT |
962 | dev_kfree_skb_any(skb); |
963 | } | |
964 | } | |
965 | ||
eebce385 | 966 | static void conn_action_stop(fsm_instance *fi, int event, void *arg) |
1da177e4 | 967 | { |
eebce385 | 968 | struct iucv_event *ev = arg; |
1da177e4 LT |
969 | struct iucv_connection *conn = ev->conn; |
970 | struct net_device *netdev = conn->netdev; | |
eebce385 | 971 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 972 | |
2a2cf6b1 | 973 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
974 | |
975 | fsm_deltimer(&conn->timer); | |
976 | fsm_newstate(fi, CONN_STATE_STOPPED); | |
977 | netiucv_purge_skb_queue(&conn->collect_queue); | |
eebce385 MS |
978 | if (conn->path) { |
979 | IUCV_DBF_TEXT(trace, 5, "calling iucv_path_sever\n"); | |
08e3356c | 980 | iucv_path_sever(conn->path, conn->userdata); |
eebce385 MS |
981 | kfree(conn->path); |
982 | conn->path = NULL; | |
983 | } | |
1da177e4 LT |
984 | netiucv_purge_skb_queue(&conn->commit_queue); |
985 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); | |
986 | } | |
987 | ||
eebce385 | 988 | static void conn_action_inval(fsm_instance *fi, int event, void *arg) |
1da177e4 | 989 | { |
eebce385 | 990 | struct iucv_connection *conn = arg; |
1da177e4 LT |
991 | struct net_device *netdev = conn->netdev; |
992 | ||
f082bcae UB |
993 | IUCV_DBF_TEXT_(data, 2, "%s('%s'): conn_action_inval called\n", |
994 | netdev->name, conn->userid); | |
1da177e4 LT |
995 | } |
996 | ||
997 | static const fsm_node conn_fsm[] = { | |
998 | { CONN_STATE_INVALID, CONN_EVENT_START, conn_action_inval }, | |
999 | { CONN_STATE_STOPPED, CONN_EVENT_START, conn_action_start }, | |
1000 | ||
1001 | { CONN_STATE_STOPPED, CONN_EVENT_STOP, conn_action_stop }, | |
1002 | { CONN_STATE_STARTWAIT, CONN_EVENT_STOP, conn_action_stop }, | |
1003 | { CONN_STATE_SETUPWAIT, CONN_EVENT_STOP, conn_action_stop }, | |
1004 | { CONN_STATE_IDLE, CONN_EVENT_STOP, conn_action_stop }, | |
1005 | { CONN_STATE_TX, CONN_EVENT_STOP, conn_action_stop }, | |
1006 | { CONN_STATE_REGERR, CONN_EVENT_STOP, conn_action_stop }, | |
1007 | { CONN_STATE_CONNERR, CONN_EVENT_STOP, conn_action_stop }, | |
1008 | ||
1009 | { CONN_STATE_STOPPED, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
1010 | { CONN_STATE_STARTWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, | |
1011 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, | |
1012 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
1013 | { CONN_STATE_TX, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
1014 | ||
1015 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_ACK, conn_action_connack }, | |
1016 | { CONN_STATE_SETUPWAIT, CONN_EVENT_TIMER, conn_action_conntimsev }, | |
1017 | ||
1018 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
1019 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
1020 | { CONN_STATE_TX, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
1021 | ||
1022 | { CONN_STATE_IDLE, CONN_EVENT_RX, conn_action_rx }, | |
1023 | { CONN_STATE_TX, CONN_EVENT_RX, conn_action_rx }, | |
1024 | ||
1025 | { CONN_STATE_TX, CONN_EVENT_TXDONE, conn_action_txdone }, | |
1026 | { CONN_STATE_IDLE, CONN_EVENT_TXDONE, conn_action_txdone }, | |
1027 | }; | |
1028 | ||
1029 | static const int CONN_FSM_LEN = sizeof(conn_fsm) / sizeof(fsm_node); | |
1030 | ||
e82b0f2c | 1031 | |
eebce385 | 1032 | /* |
1da177e4 | 1033 | * Actions for interface - statemachine. |
eebce385 | 1034 | */ |
1da177e4 LT |
1035 | |
1036 | /** | |
eebce385 MS |
1037 | * dev_action_start |
1038 | * @fi: An instance of an interface statemachine. | |
1039 | * @event: The event, just happened. | |
1040 | * @arg: Generic pointer, casted from struct net_device * upon call. | |
1da177e4 | 1041 | * |
eebce385 | 1042 | * Startup connection by sending CONN_EVENT_START to it. |
1da177e4 | 1043 | */ |
eebce385 | 1044 | static void dev_action_start(fsm_instance *fi, int event, void *arg) |
1da177e4 | 1045 | { |
eebce385 MS |
1046 | struct net_device *dev = arg; |
1047 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 | 1048 | |
2a2cf6b1 | 1049 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 1050 | |
1da177e4 | 1051 | fsm_newstate(fi, DEV_STATE_STARTWAIT); |
eebce385 | 1052 | fsm_event(privptr->conn->fsm, CONN_EVENT_START, privptr->conn); |
1da177e4 LT |
1053 | } |
1054 | ||
1055 | /** | |
1056 | * Shutdown connection by sending CONN_EVENT_STOP to it. | |
1057 | * | |
1058 | * @param fi An instance of an interface statemachine. | |
1059 | * @param event The event, just happened. | |
1060 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1061 | */ | |
1062 | static void | |
1063 | dev_action_stop(fsm_instance *fi, int event, void *arg) | |
1064 | { | |
eebce385 MS |
1065 | struct net_device *dev = arg; |
1066 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 LT |
1067 | struct iucv_event ev; |
1068 | ||
2a2cf6b1 | 1069 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1070 | |
1071 | ev.conn = privptr->conn; | |
1072 | ||
1073 | fsm_newstate(fi, DEV_STATE_STOPWAIT); | |
1074 | fsm_event(privptr->conn->fsm, CONN_EVENT_STOP, &ev); | |
1075 | } | |
1076 | ||
1077 | /** | |
1078 | * Called from connection statemachine | |
1079 | * when a connection is up and running. | |
1080 | * | |
1081 | * @param fi An instance of an interface statemachine. | |
1082 | * @param event The event, just happened. | |
1083 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1084 | */ | |
1085 | static void | |
1086 | dev_action_connup(fsm_instance *fi, int event, void *arg) | |
1087 | { | |
eebce385 MS |
1088 | struct net_device *dev = arg; |
1089 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 | 1090 | |
2a2cf6b1 | 1091 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1092 | |
1093 | switch (fsm_getstate(fi)) { | |
1094 | case DEV_STATE_STARTWAIT: | |
1095 | fsm_newstate(fi, DEV_STATE_RUNNING); | |
8f7c502c UB |
1096 | dev_info(privptr->dev, |
1097 | "The IUCV device has been connected" | |
08e3356c UB |
1098 | " successfully to %s\n", |
1099 | netiucv_printuser(privptr->conn)); | |
1da177e4 LT |
1100 | IUCV_DBF_TEXT(setup, 3, |
1101 | "connection is up and running\n"); | |
1102 | break; | |
1103 | case DEV_STATE_STOPWAIT: | |
1da177e4 LT |
1104 | IUCV_DBF_TEXT(data, 2, |
1105 | "dev_action_connup: in DEV_STATE_STOPWAIT\n"); | |
1106 | break; | |
1107 | } | |
1108 | } | |
1109 | ||
1110 | /** | |
1111 | * Called from connection statemachine | |
1112 | * when a connection has been shutdown. | |
1113 | * | |
1114 | * @param fi An instance of an interface statemachine. | |
1115 | * @param event The event, just happened. | |
1116 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1117 | */ | |
1118 | static void | |
1119 | dev_action_conndown(fsm_instance *fi, int event, void *arg) | |
1120 | { | |
2a2cf6b1 | 1121 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1122 | |
1123 | switch (fsm_getstate(fi)) { | |
1124 | case DEV_STATE_RUNNING: | |
1125 | fsm_newstate(fi, DEV_STATE_STARTWAIT); | |
1126 | break; | |
1127 | case DEV_STATE_STOPWAIT: | |
1128 | fsm_newstate(fi, DEV_STATE_STOPPED); | |
1129 | IUCV_DBF_TEXT(setup, 3, "connection is down\n"); | |
1130 | break; | |
1131 | } | |
1132 | } | |
1133 | ||
1134 | static const fsm_node dev_fsm[] = { | |
1135 | { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start }, | |
1136 | ||
1137 | { DEV_STATE_STOPWAIT, DEV_EVENT_START, dev_action_start }, | |
1138 | { DEV_STATE_STOPWAIT, DEV_EVENT_CONDOWN, dev_action_conndown }, | |
1139 | ||
1140 | { DEV_STATE_STARTWAIT, DEV_EVENT_STOP, dev_action_stop }, | |
1141 | { DEV_STATE_STARTWAIT, DEV_EVENT_CONUP, dev_action_connup }, | |
1142 | ||
1143 | { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop }, | |
1144 | { DEV_STATE_RUNNING, DEV_EVENT_CONDOWN, dev_action_conndown }, | |
21b26f2f | 1145 | { DEV_STATE_RUNNING, DEV_EVENT_CONUP, netiucv_action_nop }, |
1da177e4 LT |
1146 | }; |
1147 | ||
1148 | static const int DEV_FSM_LEN = sizeof(dev_fsm) / sizeof(fsm_node); | |
1149 | ||
1150 | /** | |
1151 | * Transmit a packet. | |
1152 | * This is a helper function for netiucv_tx(). | |
1153 | * | |
1154 | * @param conn Connection to be used for sending. | |
1155 | * @param skb Pointer to struct sk_buff of packet to send. | |
1156 | * The linklevel header has already been set up | |
1157 | * by netiucv_tx(). | |
1158 | * | |
1159 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1160 | */ | |
eebce385 MS |
1161 | static int netiucv_transmit_skb(struct iucv_connection *conn, |
1162 | struct sk_buff *skb) | |
1163 | { | |
1164 | struct iucv_message msg; | |
1da177e4 | 1165 | unsigned long saveflags; |
eebce385 MS |
1166 | struct ll_header header; |
1167 | int rc; | |
1da177e4 LT |
1168 | |
1169 | if (fsm_getstate(conn->fsm) != CONN_STATE_IDLE) { | |
1170 | int l = skb->len + NETIUCV_HDRLEN; | |
1171 | ||
1172 | spin_lock_irqsave(&conn->collect_lock, saveflags); | |
1173 | if (conn->collect_len + l > | |
1174 | (conn->max_buffsize - NETIUCV_HDRLEN)) { | |
1175 | rc = -EBUSY; | |
1176 | IUCV_DBF_TEXT(data, 2, | |
eebce385 | 1177 | "EBUSY from netiucv_transmit_skb\n"); |
1da177e4 | 1178 | } else { |
63354797 | 1179 | refcount_inc(&skb->users); |
1da177e4 LT |
1180 | skb_queue_tail(&conn->collect_queue, skb); |
1181 | conn->collect_len += l; | |
eebce385 | 1182 | rc = 0; |
1da177e4 LT |
1183 | } |
1184 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); | |
1185 | } else { | |
1186 | struct sk_buff *nskb = skb; | |
1187 | /** | |
1188 | * Copy the skb to a new allocated skb in lowmem only if the | |
1189 | * data is located above 2G in memory or tailroom is < 2. | |
1190 | */ | |
27a884dc ACM |
1191 | unsigned long hi = ((unsigned long)(skb_tail_pointer(skb) + |
1192 | NETIUCV_HDRLEN)) >> 31; | |
1da177e4 LT |
1193 | int copied = 0; |
1194 | if (hi || (skb_tailroom(skb) < 2)) { | |
1195 | nskb = alloc_skb(skb->len + NETIUCV_HDRLEN + | |
1196 | NETIUCV_HDRLEN, GFP_ATOMIC | GFP_DMA); | |
1197 | if (!nskb) { | |
1da177e4 LT |
1198 | IUCV_DBF_TEXT(data, 2, "alloc_skb failed\n"); |
1199 | rc = -ENOMEM; | |
1200 | return rc; | |
1201 | } else { | |
1202 | skb_reserve(nskb, NETIUCV_HDRLEN); | |
59ae1d12 | 1203 | skb_put_data(nskb, skb->data, skb->len); |
1da177e4 LT |
1204 | } |
1205 | copied = 1; | |
1206 | } | |
1207 | /** | |
1208 | * skb now is below 2G and has enough room. Add headers. | |
1209 | */ | |
1210 | header.next = nskb->len + NETIUCV_HDRLEN; | |
1211 | memcpy(skb_push(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
1212 | header.next = 0; | |
59ae1d12 | 1213 | skb_put_data(nskb, &header, NETIUCV_HDRLEN); |
1da177e4 LT |
1214 | |
1215 | fsm_newstate(conn->fsm, CONN_STATE_TX); | |
ee6edb97 | 1216 | conn->prof.send_stamp = jiffies; |
e82b0f2c | 1217 | |
eebce385 MS |
1218 | msg.tag = 1; |
1219 | msg.class = 0; | |
1220 | rc = iucv_message_send(conn->path, &msg, 0, 0, | |
1221 | nskb->data, nskb->len); | |
1da177e4 LT |
1222 | conn->prof.doios_single++; |
1223 | conn->prof.txlen += skb->len; | |
1224 | conn->prof.tx_pending++; | |
1225 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) | |
1226 | conn->prof.tx_max_pending = conn->prof.tx_pending; | |
1227 | if (rc) { | |
1228 | struct netiucv_priv *privptr; | |
1229 | fsm_newstate(conn->fsm, CONN_STATE_IDLE); | |
1230 | conn->prof.tx_pending--; | |
eebce385 | 1231 | privptr = netdev_priv(conn->netdev); |
1da177e4 LT |
1232 | if (privptr) |
1233 | privptr->stats.tx_errors++; | |
1234 | if (copied) | |
1235 | dev_kfree_skb(nskb); | |
1236 | else { | |
1237 | /** | |
1238 | * Remove our headers. They get added | |
1239 | * again on retransmit. | |
1240 | */ | |
1241 | skb_pull(skb, NETIUCV_HDRLEN); | |
1242 | skb_trim(skb, skb->len - NETIUCV_HDRLEN); | |
1243 | } | |
1da177e4 LT |
1244 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); |
1245 | } else { | |
1246 | if (copied) | |
1247 | dev_kfree_skb(skb); | |
63354797 | 1248 | refcount_inc(&nskb->users); |
1da177e4 LT |
1249 | skb_queue_tail(&conn->commit_queue, nskb); |
1250 | } | |
1251 | } | |
1252 | ||
1253 | return rc; | |
1254 | } | |
e82b0f2c | 1255 | |
eebce385 | 1256 | /* |
1da177e4 | 1257 | * Interface API for upper network layers |
eebce385 | 1258 | */ |
1da177e4 LT |
1259 | |
1260 | /** | |
1261 | * Open an interface. | |
1262 | * Called from generic network layer when ifconfig up is run. | |
1263 | * | |
1264 | * @param dev Pointer to interface struct. | |
1265 | * | |
1266 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1267 | */ | |
eebce385 MS |
1268 | static int netiucv_open(struct net_device *dev) |
1269 | { | |
1270 | struct netiucv_priv *priv = netdev_priv(dev); | |
1271 | ||
1272 | fsm_event(priv->fsm, DEV_EVENT_START, dev); | |
1da177e4 LT |
1273 | return 0; |
1274 | } | |
1275 | ||
1276 | /** | |
1277 | * Close an interface. | |
1278 | * Called from generic network layer when ifconfig down is run. | |
1279 | * | |
1280 | * @param dev Pointer to interface struct. | |
1281 | * | |
1282 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1283 | */ | |
eebce385 MS |
1284 | static int netiucv_close(struct net_device *dev) |
1285 | { | |
1286 | struct netiucv_priv *priv = netdev_priv(dev); | |
1287 | ||
1288 | fsm_event(priv->fsm, DEV_EVENT_STOP, dev); | |
1da177e4 LT |
1289 | return 0; |
1290 | } | |
1291 | ||
1175b257 UB |
1292 | static int netiucv_pm_prepare(struct device *dev) |
1293 | { | |
1294 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1295 | return 0; | |
1296 | } | |
1297 | ||
1298 | static void netiucv_pm_complete(struct device *dev) | |
1299 | { | |
1300 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1301 | return; | |
1302 | } | |
1303 | ||
1304 | /** | |
1305 | * netiucv_pm_freeze() - Freeze PM callback | |
1306 | * @dev: netiucv device | |
1307 | * | |
1308 | * close open netiucv interfaces | |
1309 | */ | |
1310 | static int netiucv_pm_freeze(struct device *dev) | |
1311 | { | |
4f0076f7 | 1312 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1175b257 UB |
1313 | struct net_device *ndev = NULL; |
1314 | int rc = 0; | |
1315 | ||
1316 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1317 | if (priv && priv->conn) | |
1318 | ndev = priv->conn->netdev; | |
1319 | if (!ndev) | |
1320 | goto out; | |
1321 | netif_device_detach(ndev); | |
1322 | priv->pm_state = fsm_getstate(priv->fsm); | |
1323 | rc = netiucv_close(ndev); | |
1324 | out: | |
1325 | return rc; | |
1326 | } | |
1327 | ||
1328 | /** | |
1329 | * netiucv_pm_restore_thaw() - Thaw and restore PM callback | |
1330 | * @dev: netiucv device | |
1331 | * | |
1332 | * re-open netiucv interfaces closed during freeze | |
1333 | */ | |
1334 | static int netiucv_pm_restore_thaw(struct device *dev) | |
1335 | { | |
4f0076f7 | 1336 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1175b257 UB |
1337 | struct net_device *ndev = NULL; |
1338 | int rc = 0; | |
1339 | ||
1340 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1341 | if (priv && priv->conn) | |
1342 | ndev = priv->conn->netdev; | |
1343 | if (!ndev) | |
1344 | goto out; | |
1345 | switch (priv->pm_state) { | |
1346 | case DEV_STATE_RUNNING: | |
1347 | case DEV_STATE_STARTWAIT: | |
1348 | rc = netiucv_open(ndev); | |
1349 | break; | |
1350 | default: | |
1351 | break; | |
1352 | } | |
1353 | netif_device_attach(ndev); | |
1354 | out: | |
1355 | return rc; | |
1356 | } | |
1357 | ||
1da177e4 LT |
1358 | /** |
1359 | * Start transmission of a packet. | |
1360 | * Called from generic network device layer. | |
1361 | * | |
1362 | * @param skb Pointer to buffer containing the packet. | |
1363 | * @param dev Pointer to interface struct. | |
1364 | * | |
1365 | * @return 0 if packet consumed, !0 if packet rejected. | |
1366 | * Note: If we return !0, then the packet is free'd by | |
1367 | * the generic network layer. | |
1368 | */ | |
1369 | static int netiucv_tx(struct sk_buff *skb, struct net_device *dev) | |
1370 | { | |
eebce385 MS |
1371 | struct netiucv_priv *privptr = netdev_priv(dev); |
1372 | int rc; | |
1da177e4 | 1373 | |
2a2cf6b1 | 1374 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1375 | /** |
1376 | * Some sanity checks ... | |
1377 | */ | |
1378 | if (skb == NULL) { | |
1da177e4 LT |
1379 | IUCV_DBF_TEXT(data, 2, "netiucv_tx: skb is NULL\n"); |
1380 | privptr->stats.tx_dropped++; | |
ec634fe3 | 1381 | return NETDEV_TX_OK; |
1da177e4 LT |
1382 | } |
1383 | if (skb_headroom(skb) < NETIUCV_HDRLEN) { | |
1da177e4 LT |
1384 | IUCV_DBF_TEXT(data, 2, |
1385 | "netiucv_tx: skb_headroom < NETIUCV_HDRLEN\n"); | |
1386 | dev_kfree_skb(skb); | |
1387 | privptr->stats.tx_dropped++; | |
ec634fe3 | 1388 | return NETDEV_TX_OK; |
1da177e4 LT |
1389 | } |
1390 | ||
1391 | /** | |
1392 | * If connection is not running, try to restart it | |
e82b0f2c | 1393 | * and throw away packet. |
1da177e4 LT |
1394 | */ |
1395 | if (fsm_getstate(privptr->fsm) != DEV_STATE_RUNNING) { | |
1da177e4 LT |
1396 | dev_kfree_skb(skb); |
1397 | privptr->stats.tx_dropped++; | |
1398 | privptr->stats.tx_errors++; | |
1399 | privptr->stats.tx_carrier_errors++; | |
ec634fe3 | 1400 | return NETDEV_TX_OK; |
1da177e4 LT |
1401 | } |
1402 | ||
1403 | if (netiucv_test_and_set_busy(dev)) { | |
1404 | IUCV_DBF_TEXT(data, 2, "EBUSY from netiucv_tx\n"); | |
4e584d66 | 1405 | return NETDEV_TX_BUSY; |
1da177e4 | 1406 | } |
860e9538 | 1407 | netif_trans_update(dev); |
5b548140 | 1408 | rc = netiucv_transmit_skb(privptr->conn, skb); |
1da177e4 | 1409 | netiucv_clear_busy(dev); |
5b548140 | 1410 | return rc ? NETDEV_TX_BUSY : NETDEV_TX_OK; |
1da177e4 LT |
1411 | } |
1412 | ||
1413 | /** | |
eebce385 MS |
1414 | * netiucv_stats |
1415 | * @dev: Pointer to interface struct. | |
1da177e4 | 1416 | * |
eebce385 | 1417 | * Returns interface statistics of a device. |
1da177e4 | 1418 | * |
eebce385 | 1419 | * Returns pointer to stats struct of this interface. |
1da177e4 | 1420 | */ |
eebce385 | 1421 | static struct net_device_stats *netiucv_stats (struct net_device * dev) |
1da177e4 | 1422 | { |
eebce385 MS |
1423 | struct netiucv_priv *priv = netdev_priv(dev); |
1424 | ||
2a2cf6b1 | 1425 | IUCV_DBF_TEXT(trace, 5, __func__); |
eebce385 | 1426 | return &priv->stats; |
1da177e4 LT |
1427 | } |
1428 | ||
eebce385 | 1429 | /* |
1da177e4 | 1430 | * attributes in sysfs |
eebce385 | 1431 | */ |
1da177e4 | 1432 | |
eebce385 MS |
1433 | static ssize_t user_show(struct device *dev, struct device_attribute *attr, |
1434 | char *buf) | |
1da177e4 | 1435 | { |
dff59b64 | 1436 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1437 | |
2a2cf6b1 | 1438 | IUCV_DBF_TEXT(trace, 5, __func__); |
08e3356c | 1439 | return sprintf(buf, "%s\n", netiucv_printuser(priv->conn)); |
1da177e4 LT |
1440 | } |
1441 | ||
08e3356c UB |
1442 | static int netiucv_check_user(const char *buf, size_t count, char *username, |
1443 | char *userdata) | |
1da177e4 | 1444 | { |
08e3356c UB |
1445 | const char *p; |
1446 | int i; | |
1da177e4 | 1447 | |
08e3356c UB |
1448 | p = strchr(buf, '.'); |
1449 | if ((p && ((count > 26) || | |
1450 | ((p - buf) > 8) || | |
1451 | (buf + count - p > 18))) || | |
1452 | (!p && (count > 9))) { | |
1453 | IUCV_DBF_TEXT(setup, 2, "conn_write: too long\n"); | |
1da177e4 LT |
1454 | return -EINVAL; |
1455 | } | |
1456 | ||
08e3356c UB |
1457 | for (i = 0, p = buf; i < 8 && *p && *p != '.'; i++, p++) { |
1458 | if (isalnum(*p) || *p == '$') { | |
1459 | username[i] = toupper(*p); | |
eebce385 MS |
1460 | continue; |
1461 | } | |
08e3356c | 1462 | if (*p == '\n') |
1da177e4 LT |
1463 | /* trailing lf, grr */ |
1464 | break; | |
eebce385 | 1465 | IUCV_DBF_TEXT_(setup, 2, |
08e3356c | 1466 | "conn_write: invalid character %02x\n", *p); |
eebce385 | 1467 | return -EINVAL; |
1da177e4 | 1468 | } |
eebce385 | 1469 | while (i < 8) |
1da177e4 | 1470 | username[i++] = ' '; |
16a83b30 | 1471 | username[8] = '\0'; |
1da177e4 | 1472 | |
08e3356c UB |
1473 | if (*p == '.') { |
1474 | p++; | |
1475 | for (i = 0; i < 16 && *p; i++, p++) { | |
1476 | if (*p == '\n') | |
1477 | break; | |
1478 | userdata[i] = toupper(*p); | |
1479 | } | |
1480 | while (i > 0 && i < 16) | |
1481 | userdata[i++] = ' '; | |
1482 | } else | |
1483 | memcpy(userdata, iucvMagic_ascii, 16); | |
1484 | userdata[16] = '\0'; | |
1485 | ASCEBC(userdata, 16); | |
1486 | ||
1487 | return 0; | |
1488 | } | |
1489 | ||
1490 | static ssize_t user_write(struct device *dev, struct device_attribute *attr, | |
1491 | const char *buf, size_t count) | |
1492 | { | |
1493 | struct netiucv_priv *priv = dev_get_drvdata(dev); | |
1494 | struct net_device *ndev = priv->conn->netdev; | |
1495 | char username[9]; | |
1496 | char userdata[17]; | |
1497 | int rc; | |
1498 | struct iucv_connection *cp; | |
1499 | ||
1500 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1501 | rc = netiucv_check_user(buf, count, username, userdata); | |
1502 | if (rc) | |
1503 | return rc; | |
1504 | ||
eebce385 MS |
1505 | if (memcmp(username, priv->conn->userid, 9) && |
1506 | (ndev->flags & (IFF_UP | IFF_RUNNING))) { | |
1507 | /* username changed while the interface is active. */ | |
eebce385 | 1508 | IUCV_DBF_TEXT(setup, 2, "user_write: device active\n"); |
f082bcae | 1509 | return -EPERM; |
eebce385 MS |
1510 | } |
1511 | read_lock_bh(&iucv_connection_rwlock); | |
1512 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
08e3356c UB |
1513 | if (!strncmp(username, cp->userid, 9) && |
1514 | !strncmp(userdata, cp->userdata, 17) && cp->netdev != ndev) { | |
eebce385 | 1515 | read_unlock_bh(&iucv_connection_rwlock); |
08e3356c UB |
1516 | IUCV_DBF_TEXT_(setup, 2, "user_write: Connection to %s " |
1517 | "already exists\n", netiucv_printuser(cp)); | |
eebce385 | 1518 | return -EEXIST; |
1da177e4 LT |
1519 | } |
1520 | } | |
eebce385 | 1521 | read_unlock_bh(&iucv_connection_rwlock); |
1da177e4 | 1522 | memcpy(priv->conn->userid, username, 9); |
08e3356c | 1523 | memcpy(priv->conn->userdata, userdata, 17); |
1da177e4 | 1524 | return count; |
1da177e4 LT |
1525 | } |
1526 | ||
1527 | static DEVICE_ATTR(user, 0644, user_show, user_write); | |
1528 | ||
eebce385 MS |
1529 | static ssize_t buffer_show (struct device *dev, struct device_attribute *attr, |
1530 | char *buf) | |
dff59b64 GKH |
1531 | { |
1532 | struct netiucv_priv *priv = dev_get_drvdata(dev); | |
1da177e4 | 1533 | |
2a2cf6b1 | 1534 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1535 | return sprintf(buf, "%d\n", priv->conn->max_buffsize); |
1536 | } | |
1537 | ||
eebce385 MS |
1538 | static ssize_t buffer_write (struct device *dev, struct device_attribute *attr, |
1539 | const char *buf, size_t count) | |
1da177e4 | 1540 | { |
dff59b64 | 1541 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1542 | struct net_device *ndev = priv->conn->netdev; |
9edebf11 UB |
1543 | unsigned int bs1; |
1544 | int rc; | |
1da177e4 | 1545 | |
2a2cf6b1 | 1546 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1547 | if (count >= 39) |
1548 | return -EINVAL; | |
1549 | ||
9edebf11 | 1550 | rc = kstrtouint(buf, 0, &bs1); |
1da177e4 | 1551 | |
9edebf11 UB |
1552 | if (rc == -EINVAL) { |
1553 | IUCV_DBF_TEXT_(setup, 2, "buffer_write: invalid char %s\n", | |
1554 | buf); | |
1da177e4 LT |
1555 | return -EINVAL; |
1556 | } | |
9edebf11 | 1557 | if ((rc == -ERANGE) || (bs1 > NETIUCV_BUFSIZE_MAX)) { |
1da177e4 LT |
1558 | IUCV_DBF_TEXT_(setup, 2, |
1559 | "buffer_write: buffer size %d too large\n", | |
1560 | bs1); | |
1561 | return -EINVAL; | |
1562 | } | |
1563 | if ((ndev->flags & IFF_RUNNING) && | |
1564 | (bs1 < (ndev->mtu + NETIUCV_HDRLEN + 2))) { | |
1da177e4 LT |
1565 | IUCV_DBF_TEXT_(setup, 2, |
1566 | "buffer_write: buffer size %d too small\n", | |
1567 | bs1); | |
1568 | return -EINVAL; | |
1569 | } | |
1570 | if (bs1 < (576 + NETIUCV_HDRLEN + NETIUCV_HDRLEN)) { | |
1da177e4 LT |
1571 | IUCV_DBF_TEXT_(setup, 2, |
1572 | "buffer_write: buffer size %d too small\n", | |
1573 | bs1); | |
1574 | return -EINVAL; | |
1575 | } | |
1576 | ||
1577 | priv->conn->max_buffsize = bs1; | |
1578 | if (!(ndev->flags & IFF_RUNNING)) | |
1579 | ndev->mtu = bs1 - NETIUCV_HDRLEN - NETIUCV_HDRLEN; | |
1580 | ||
1581 | return count; | |
1582 | ||
1583 | } | |
1584 | ||
1585 | static DEVICE_ATTR(buffer, 0644, buffer_show, buffer_write); | |
1586 | ||
eebce385 MS |
1587 | static ssize_t dev_fsm_show (struct device *dev, struct device_attribute *attr, |
1588 | char *buf) | |
1da177e4 | 1589 | { |
dff59b64 | 1590 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1591 | |
2a2cf6b1 | 1592 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1593 | return sprintf(buf, "%s\n", fsm_getstate_str(priv->fsm)); |
1594 | } | |
1595 | ||
1596 | static DEVICE_ATTR(device_fsm_state, 0444, dev_fsm_show, NULL); | |
1597 | ||
eebce385 MS |
1598 | static ssize_t conn_fsm_show (struct device *dev, |
1599 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1600 | { |
dff59b64 | 1601 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1602 | |
2a2cf6b1 | 1603 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1604 | return sprintf(buf, "%s\n", fsm_getstate_str(priv->conn->fsm)); |
1605 | } | |
1606 | ||
1607 | static DEVICE_ATTR(connection_fsm_state, 0444, conn_fsm_show, NULL); | |
1608 | ||
eebce385 MS |
1609 | static ssize_t maxmulti_show (struct device *dev, |
1610 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1611 | { |
dff59b64 | 1612 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1613 | |
2a2cf6b1 | 1614 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1615 | return sprintf(buf, "%ld\n", priv->conn->prof.maxmulti); |
1616 | } | |
1617 | ||
eebce385 MS |
1618 | static ssize_t maxmulti_write (struct device *dev, |
1619 | struct device_attribute *attr, | |
1620 | const char *buf, size_t count) | |
1da177e4 | 1621 | { |
dff59b64 | 1622 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1623 | |
2a2cf6b1 | 1624 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1625 | priv->conn->prof.maxmulti = 0; |
1626 | return count; | |
1627 | } | |
1628 | ||
1629 | static DEVICE_ATTR(max_tx_buffer_used, 0644, maxmulti_show, maxmulti_write); | |
1630 | ||
eebce385 MS |
1631 | static ssize_t maxcq_show (struct device *dev, struct device_attribute *attr, |
1632 | char *buf) | |
1da177e4 | 1633 | { |
dff59b64 | 1634 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1635 | |
2a2cf6b1 | 1636 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1637 | return sprintf(buf, "%ld\n", priv->conn->prof.maxcqueue); |
1638 | } | |
1639 | ||
eebce385 MS |
1640 | static ssize_t maxcq_write (struct device *dev, struct device_attribute *attr, |
1641 | const char *buf, size_t count) | |
1da177e4 | 1642 | { |
dff59b64 | 1643 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
e82b0f2c | 1644 | |
2a2cf6b1 | 1645 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1646 | priv->conn->prof.maxcqueue = 0; |
1647 | return count; | |
1648 | } | |
1649 | ||
1650 | static DEVICE_ATTR(max_chained_skbs, 0644, maxcq_show, maxcq_write); | |
1651 | ||
eebce385 MS |
1652 | static ssize_t sdoio_show (struct device *dev, struct device_attribute *attr, |
1653 | char *buf) | |
1da177e4 | 1654 | { |
dff59b64 | 1655 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1656 | |
2a2cf6b1 | 1657 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1658 | return sprintf(buf, "%ld\n", priv->conn->prof.doios_single); |
1659 | } | |
1660 | ||
eebce385 MS |
1661 | static ssize_t sdoio_write (struct device *dev, struct device_attribute *attr, |
1662 | const char *buf, size_t count) | |
1da177e4 | 1663 | { |
dff59b64 | 1664 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
e82b0f2c | 1665 | |
2a2cf6b1 | 1666 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1667 | priv->conn->prof.doios_single = 0; |
1668 | return count; | |
1669 | } | |
1670 | ||
1671 | static DEVICE_ATTR(tx_single_write_ops, 0644, sdoio_show, sdoio_write); | |
1672 | ||
eebce385 MS |
1673 | static ssize_t mdoio_show (struct device *dev, struct device_attribute *attr, |
1674 | char *buf) | |
1da177e4 | 1675 | { |
dff59b64 | 1676 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1677 | |
2a2cf6b1 | 1678 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1679 | return sprintf(buf, "%ld\n", priv->conn->prof.doios_multi); |
1680 | } | |
1681 | ||
eebce385 MS |
1682 | static ssize_t mdoio_write (struct device *dev, struct device_attribute *attr, |
1683 | const char *buf, size_t count) | |
1da177e4 | 1684 | { |
dff59b64 | 1685 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
e82b0f2c | 1686 | |
2a2cf6b1 | 1687 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1688 | priv->conn->prof.doios_multi = 0; |
1689 | return count; | |
1690 | } | |
1691 | ||
1692 | static DEVICE_ATTR(tx_multi_write_ops, 0644, mdoio_show, mdoio_write); | |
1693 | ||
eebce385 MS |
1694 | static ssize_t txlen_show (struct device *dev, struct device_attribute *attr, |
1695 | char *buf) | |
1da177e4 | 1696 | { |
dff59b64 | 1697 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1698 | |
2a2cf6b1 | 1699 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1700 | return sprintf(buf, "%ld\n", priv->conn->prof.txlen); |
1701 | } | |
1702 | ||
eebce385 MS |
1703 | static ssize_t txlen_write (struct device *dev, struct device_attribute *attr, |
1704 | const char *buf, size_t count) | |
1da177e4 | 1705 | { |
dff59b64 | 1706 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
e82b0f2c | 1707 | |
2a2cf6b1 | 1708 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1709 | priv->conn->prof.txlen = 0; |
1710 | return count; | |
1711 | } | |
1712 | ||
1713 | static DEVICE_ATTR(netto_bytes, 0644, txlen_show, txlen_write); | |
1714 | ||
eebce385 MS |
1715 | static ssize_t txtime_show (struct device *dev, struct device_attribute *attr, |
1716 | char *buf) | |
1da177e4 | 1717 | { |
dff59b64 | 1718 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1719 | |
2a2cf6b1 | 1720 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1721 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_time); |
1722 | } | |
1723 | ||
eebce385 MS |
1724 | static ssize_t txtime_write (struct device *dev, struct device_attribute *attr, |
1725 | const char *buf, size_t count) | |
1da177e4 | 1726 | { |
dff59b64 | 1727 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
e82b0f2c | 1728 | |
2a2cf6b1 | 1729 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1730 | priv->conn->prof.tx_time = 0; |
1731 | return count; | |
1732 | } | |
1733 | ||
1734 | static DEVICE_ATTR(max_tx_io_time, 0644, txtime_show, txtime_write); | |
1735 | ||
eebce385 MS |
1736 | static ssize_t txpend_show (struct device *dev, struct device_attribute *attr, |
1737 | char *buf) | |
1da177e4 | 1738 | { |
dff59b64 | 1739 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1740 | |
2a2cf6b1 | 1741 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1742 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_pending); |
1743 | } | |
1744 | ||
eebce385 MS |
1745 | static ssize_t txpend_write (struct device *dev, struct device_attribute *attr, |
1746 | const char *buf, size_t count) | |
1da177e4 | 1747 | { |
dff59b64 | 1748 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1749 | |
2a2cf6b1 | 1750 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1751 | priv->conn->prof.tx_pending = 0; |
1752 | return count; | |
1753 | } | |
1754 | ||
1755 | static DEVICE_ATTR(tx_pending, 0644, txpend_show, txpend_write); | |
1756 | ||
eebce385 MS |
1757 | static ssize_t txmpnd_show (struct device *dev, struct device_attribute *attr, |
1758 | char *buf) | |
1da177e4 | 1759 | { |
dff59b64 | 1760 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1761 | |
2a2cf6b1 | 1762 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1763 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_max_pending); |
1764 | } | |
1765 | ||
eebce385 MS |
1766 | static ssize_t txmpnd_write (struct device *dev, struct device_attribute *attr, |
1767 | const char *buf, size_t count) | |
1da177e4 | 1768 | { |
dff59b64 | 1769 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1770 | |
2a2cf6b1 | 1771 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1772 | priv->conn->prof.tx_max_pending = 0; |
1773 | return count; | |
1774 | } | |
1775 | ||
1776 | static DEVICE_ATTR(tx_max_pending, 0644, txmpnd_show, txmpnd_write); | |
1777 | ||
1778 | static struct attribute *netiucv_attrs[] = { | |
1779 | &dev_attr_buffer.attr, | |
1780 | &dev_attr_user.attr, | |
1781 | NULL, | |
1782 | }; | |
1783 | ||
1784 | static struct attribute_group netiucv_attr_group = { | |
1785 | .attrs = netiucv_attrs, | |
1786 | }; | |
1787 | ||
1788 | static struct attribute *netiucv_stat_attrs[] = { | |
1789 | &dev_attr_device_fsm_state.attr, | |
1790 | &dev_attr_connection_fsm_state.attr, | |
1791 | &dev_attr_max_tx_buffer_used.attr, | |
1792 | &dev_attr_max_chained_skbs.attr, | |
1793 | &dev_attr_tx_single_write_ops.attr, | |
1794 | &dev_attr_tx_multi_write_ops.attr, | |
1795 | &dev_attr_netto_bytes.attr, | |
1796 | &dev_attr_max_tx_io_time.attr, | |
1797 | &dev_attr_tx_pending.attr, | |
1798 | &dev_attr_tx_max_pending.attr, | |
1799 | NULL, | |
1800 | }; | |
1801 | ||
1802 | static struct attribute_group netiucv_stat_attr_group = { | |
1803 | .name = "stats", | |
1804 | .attrs = netiucv_stat_attrs, | |
1805 | }; | |
1806 | ||
0b945293 | 1807 | static const struct attribute_group *netiucv_attr_groups[] = { |
1808 | &netiucv_stat_attr_group, | |
1809 | &netiucv_attr_group, | |
1810 | NULL, | |
1811 | }; | |
1da177e4 | 1812 | |
eebce385 | 1813 | static int netiucv_register_device(struct net_device *ndev) |
1da177e4 | 1814 | { |
eebce385 | 1815 | struct netiucv_priv *priv = netdev_priv(ndev); |
88abaab4 | 1816 | struct device *dev = kzalloc(sizeof(struct device), GFP_KERNEL); |
1da177e4 LT |
1817 | int ret; |
1818 | ||
2a2cf6b1 | 1819 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1820 | |
1821 | if (dev) { | |
1bf5b285 | 1822 | dev_set_name(dev, "net%s", ndev->name); |
1da177e4 LT |
1823 | dev->bus = &iucv_bus; |
1824 | dev->parent = iucv_root; | |
0b945293 | 1825 | dev->groups = netiucv_attr_groups; |
1da177e4 LT |
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 | 1843 | priv->dev = dev; |
dff59b64 | 1844 | dev_set_drvdata(dev, priv); |
1da177e4 | 1845 | return 0; |
1da177e4 LT |
1846 | } |
1847 | ||
eebce385 | 1848 | static void netiucv_unregister_device(struct device *dev) |
1da177e4 | 1849 | { |
2a2cf6b1 | 1850 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1851 | device_unregister(dev); |
1852 | } | |
1853 | ||
1854 | /** | |
1855 | * Allocate and initialize a new connection structure. | |
1856 | * Add it to the list of netiucv connections; | |
1857 | */ | |
eebce385 | 1858 | static struct iucv_connection *netiucv_new_connection(struct net_device *dev, |
08e3356c UB |
1859 | char *username, |
1860 | char *userdata) | |
eebce385 MS |
1861 | { |
1862 | struct iucv_connection *conn; | |
1da177e4 | 1863 | |
eebce385 MS |
1864 | conn = kzalloc(sizeof(*conn), GFP_KERNEL); |
1865 | if (!conn) | |
1866 | goto out; | |
1867 | skb_queue_head_init(&conn->collect_queue); | |
1868 | skb_queue_head_init(&conn->commit_queue); | |
1869 | spin_lock_init(&conn->collect_lock); | |
1870 | conn->max_buffsize = NETIUCV_BUFSIZE_DEFAULT; | |
1871 | conn->netdev = dev; | |
1872 | ||
1873 | conn->rx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA); | |
1874 | if (!conn->rx_buff) | |
1875 | goto out_conn; | |
1876 | conn->tx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA); | |
1877 | if (!conn->tx_buff) | |
1878 | goto out_rx; | |
1879 | conn->fsm = init_fsm("netiucvconn", conn_state_names, | |
1880 | conn_event_names, NR_CONN_STATES, | |
1881 | NR_CONN_EVENTS, conn_fsm, CONN_FSM_LEN, | |
1882 | GFP_KERNEL); | |
1883 | if (!conn->fsm) | |
1884 | goto out_tx; | |
1885 | ||
1886 | fsm_settimer(conn->fsm, &conn->timer); | |
1887 | fsm_newstate(conn->fsm, CONN_STATE_INVALID); | |
1888 | ||
08e3356c UB |
1889 | if (userdata) |
1890 | memcpy(conn->userdata, userdata, 17); | |
eebce385 MS |
1891 | if (username) { |
1892 | memcpy(conn->userid, username, 9); | |
1893 | fsm_newstate(conn->fsm, CONN_STATE_STOPPED); | |
1da177e4 | 1894 | } |
eebce385 MS |
1895 | |
1896 | write_lock_bh(&iucv_connection_rwlock); | |
1897 | list_add_tail(&conn->list, &iucv_connection_list); | |
1898 | write_unlock_bh(&iucv_connection_rwlock); | |
1da177e4 | 1899 | return conn; |
eebce385 MS |
1900 | |
1901 | out_tx: | |
1902 | kfree_skb(conn->tx_buff); | |
1903 | out_rx: | |
1904 | kfree_skb(conn->rx_buff); | |
1905 | out_conn: | |
1906 | kfree(conn); | |
1907 | out: | |
1908 | return NULL; | |
1da177e4 LT |
1909 | } |
1910 | ||
1911 | /** | |
1912 | * Release a connection structure and remove it from the | |
1913 | * list of netiucv connections. | |
1914 | */ | |
eebce385 | 1915 | static void netiucv_remove_connection(struct iucv_connection *conn) |
1da177e4 | 1916 | { |
08e3356c | 1917 | |
2a2cf6b1 | 1918 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 MS |
1919 | write_lock_bh(&iucv_connection_rwlock); |
1920 | list_del_init(&conn->list); | |
1921 | write_unlock_bh(&iucv_connection_rwlock); | |
0be4acec UB |
1922 | fsm_deltimer(&conn->timer); |
1923 | netiucv_purge_skb_queue(&conn->collect_queue); | |
eebce385 | 1924 | if (conn->path) { |
08e3356c | 1925 | iucv_path_sever(conn->path, conn->userdata); |
eebce385 MS |
1926 | kfree(conn->path); |
1927 | conn->path = NULL; | |
1da177e4 | 1928 | } |
0be4acec | 1929 | netiucv_purge_skb_queue(&conn->commit_queue); |
eebce385 MS |
1930 | kfree_fsm(conn->fsm); |
1931 | kfree_skb(conn->rx_buff); | |
1932 | kfree_skb(conn->tx_buff); | |
1da177e4 LT |
1933 | } |
1934 | ||
1935 | /** | |
1936 | * Release everything of a net device. | |
1937 | */ | |
eebce385 | 1938 | static void netiucv_free_netdevice(struct net_device *dev) |
1da177e4 | 1939 | { |
eebce385 | 1940 | struct netiucv_priv *privptr = netdev_priv(dev); |
1da177e4 | 1941 | |
2a2cf6b1 | 1942 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1943 | |
1944 | if (!dev) | |
1945 | return; | |
1946 | ||
1da177e4 LT |
1947 | if (privptr) { |
1948 | if (privptr->conn) | |
1949 | netiucv_remove_connection(privptr->conn); | |
1950 | if (privptr->fsm) | |
1951 | kfree_fsm(privptr->fsm); | |
1952 | privptr->conn = NULL; privptr->fsm = NULL; | |
1953 | /* privptr gets freed by free_netdev() */ | |
1954 | } | |
1da177e4 LT |
1955 | } |
1956 | ||
1957 | /** | |
1958 | * Initialize a net device. (Called from kernel in alloc_netdev()) | |
1959 | */ | |
4edd73b5 FB |
1960 | static const struct net_device_ops netiucv_netdev_ops = { |
1961 | .ndo_open = netiucv_open, | |
1962 | .ndo_stop = netiucv_close, | |
1963 | .ndo_get_stats = netiucv_stats, | |
1964 | .ndo_start_xmit = netiucv_tx, | |
4edd73b5 FB |
1965 | }; |
1966 | ||
eebce385 | 1967 | static void netiucv_setup_netdevice(struct net_device *dev) |
1da177e4 | 1968 | { |
1da177e4 | 1969 | dev->mtu = NETIUCV_MTU_DEFAULT; |
46b3ef4c JW |
1970 | dev->min_mtu = 576; |
1971 | dev->max_mtu = NETIUCV_MTU_MAX; | |
cd1997f6 SR |
1972 | dev->needs_free_netdev = true; |
1973 | dev->priv_destructor = netiucv_free_netdevice; | |
1da177e4 LT |
1974 | dev->hard_header_len = NETIUCV_HDRLEN; |
1975 | dev->addr_len = 0; | |
1976 | dev->type = ARPHRD_SLIP; | |
1977 | dev->tx_queue_len = NETIUCV_QUEUELEN_DEFAULT; | |
1978 | dev->flags = IFF_POINTOPOINT | IFF_NOARP; | |
4edd73b5 | 1979 | dev->netdev_ops = &netiucv_netdev_ops; |
1da177e4 LT |
1980 | } |
1981 | ||
1982 | /** | |
1983 | * Allocate and initialize everything of a net device. | |
1984 | */ | |
08e3356c | 1985 | static struct net_device *netiucv_init_netdevice(char *username, char *userdata) |
1da177e4 LT |
1986 | { |
1987 | struct netiucv_priv *privptr; | |
1988 | struct net_device *dev; | |
1989 | ||
1990 | dev = alloc_netdev(sizeof(struct netiucv_priv), "iucv%d", | |
c835a677 | 1991 | NET_NAME_UNKNOWN, netiucv_setup_netdevice); |
1da177e4 LT |
1992 | if (!dev) |
1993 | return NULL; | |
aaf9522d | 1994 | rtnl_lock(); |
1d503563 UB |
1995 | if (dev_alloc_name(dev, dev->name) < 0) |
1996 | goto out_netdev; | |
1da177e4 | 1997 | |
eebce385 | 1998 | privptr = netdev_priv(dev); |
1da177e4 LT |
1999 | privptr->fsm = init_fsm("netiucvdev", dev_state_names, |
2000 | dev_event_names, NR_DEV_STATES, NR_DEV_EVENTS, | |
2001 | dev_fsm, DEV_FSM_LEN, GFP_KERNEL); | |
eebce385 MS |
2002 | if (!privptr->fsm) |
2003 | goto out_netdev; | |
2004 | ||
08e3356c | 2005 | privptr->conn = netiucv_new_connection(dev, username, userdata); |
1da177e4 | 2006 | if (!privptr->conn) { |
1da177e4 | 2007 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_new_connection\n"); |
eebce385 | 2008 | goto out_fsm; |
1da177e4 LT |
2009 | } |
2010 | fsm_newstate(privptr->fsm, DEV_STATE_STOPPED); | |
1da177e4 | 2011 | return dev; |
eebce385 MS |
2012 | |
2013 | out_fsm: | |
2014 | kfree_fsm(privptr->fsm); | |
2015 | out_netdev: | |
aaf9522d | 2016 | rtnl_unlock(); |
eebce385 MS |
2017 | free_netdev(dev); |
2018 | return NULL; | |
1da177e4 LT |
2019 | } |
2020 | ||
36369569 GKH |
2021 | static ssize_t connection_store(struct device_driver *drv, const char *buf, |
2022 | size_t count) | |
1da177e4 | 2023 | { |
16a83b30 | 2024 | char username[9]; |
08e3356c UB |
2025 | char userdata[17]; |
2026 | int rc; | |
1da177e4 | 2027 | struct net_device *dev; |
eebce385 MS |
2028 | struct netiucv_priv *priv; |
2029 | struct iucv_connection *cp; | |
1da177e4 | 2030 | |
2a2cf6b1 | 2031 | IUCV_DBF_TEXT(trace, 3, __func__); |
08e3356c UB |
2032 | rc = netiucv_check_user(buf, count, username, userdata); |
2033 | if (rc) | |
2034 | return rc; | |
16a83b30 | 2035 | |
eebce385 MS |
2036 | read_lock_bh(&iucv_connection_rwlock); |
2037 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
08e3356c UB |
2038 | if (!strncmp(username, cp->userid, 9) && |
2039 | !strncmp(userdata, cp->userdata, 17)) { | |
eebce385 | 2040 | read_unlock_bh(&iucv_connection_rwlock); |
08e3356c UB |
2041 | IUCV_DBF_TEXT_(setup, 2, "conn_write: Connection to %s " |
2042 | "already exists\n", netiucv_printuser(cp)); | |
eebce385 MS |
2043 | return -EEXIST; |
2044 | } | |
16a83b30 | 2045 | } |
eebce385 MS |
2046 | read_unlock_bh(&iucv_connection_rwlock); |
2047 | ||
08e3356c | 2048 | dev = netiucv_init_netdevice(username, userdata); |
1da177e4 | 2049 | if (!dev) { |
1da177e4 LT |
2050 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_init_netdevice\n"); |
2051 | return -ENODEV; | |
2052 | } | |
2053 | ||
eebce385 MS |
2054 | rc = netiucv_register_device(dev); |
2055 | if (rc) { | |
aaf9522d | 2056 | rtnl_unlock(); |
1da177e4 | 2057 | IUCV_DBF_TEXT_(setup, 2, |
eebce385 | 2058 | "ret %d from netiucv_register_device\n", rc); |
1da177e4 LT |
2059 | goto out_free_ndev; |
2060 | } | |
2061 | ||
2062 | /* sysfs magic */ | |
eebce385 MS |
2063 | priv = netdev_priv(dev); |
2064 | SET_NETDEV_DEV(dev, priv->dev); | |
1da177e4 | 2065 | |
aaf9522d BP |
2066 | rc = register_netdevice(dev); |
2067 | rtnl_unlock(); | |
eebce385 MS |
2068 | if (rc) |
2069 | goto out_unreg; | |
1da177e4 | 2070 | |
08e3356c UB |
2071 | dev_info(priv->dev, "The IUCV interface to %s has been established " |
2072 | "successfully\n", | |
2073 | netiucv_printuser(priv->conn)); | |
e82b0f2c | 2074 | |
1da177e4 LT |
2075 | return count; |
2076 | ||
eebce385 MS |
2077 | out_unreg: |
2078 | netiucv_unregister_device(priv->dev); | |
1da177e4 | 2079 | out_free_ndev: |
1da177e4 | 2080 | netiucv_free_netdevice(dev); |
eebce385 | 2081 | return rc; |
1da177e4 | 2082 | } |
36369569 | 2083 | static DRIVER_ATTR_WO(connection); |
1da177e4 | 2084 | |
36369569 GKH |
2085 | static ssize_t remove_store(struct device_driver *drv, const char *buf, |
2086 | size_t count) | |
1da177e4 | 2087 | { |
eebce385 | 2088 | struct iucv_connection *cp; |
1da177e4 LT |
2089 | struct net_device *ndev; |
2090 | struct netiucv_priv *priv; | |
2091 | struct device *dev; | |
2092 | char name[IFNAMSIZ]; | |
eebce385 | 2093 | const char *p; |
1da177e4 LT |
2094 | int i; |
2095 | ||
2a2cf6b1 | 2096 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
2097 | |
2098 | if (count >= IFNAMSIZ) | |
a419aef8 | 2099 | count = IFNAMSIZ - 1; |
1da177e4 | 2100 | |
eebce385 MS |
2101 | for (i = 0, p = buf; i < count && *p; i++, p++) { |
2102 | if (*p == '\n' || *p == ' ') | |
1da177e4 LT |
2103 | /* trailing lf, grr */ |
2104 | break; | |
eebce385 | 2105 | name[i] = *p; |
1da177e4 LT |
2106 | } |
2107 | name[i] = '\0'; | |
2108 | ||
eebce385 MS |
2109 | read_lock_bh(&iucv_connection_rwlock); |
2110 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
2111 | ndev = cp->netdev; | |
2112 | priv = netdev_priv(ndev); | |
1da177e4 | 2113 | dev = priv->dev; |
eebce385 MS |
2114 | if (strncmp(name, ndev->name, count)) |
2115 | continue; | |
2116 | read_unlock_bh(&iucv_connection_rwlock); | |
1da177e4 | 2117 | if (ndev->flags & (IFF_UP | IFF_RUNNING)) { |
8f7c502c UB |
2118 | dev_warn(dev, "The IUCV device is connected" |
2119 | " to %s and cannot be removed\n", | |
2120 | priv->conn->userid); | |
1da177e4 | 2121 | IUCV_DBF_TEXT(data, 2, "remove_write: still active\n"); |
f082bcae | 2122 | return -EPERM; |
1da177e4 LT |
2123 | } |
2124 | unregister_netdev(ndev); | |
2125 | netiucv_unregister_device(dev); | |
2126 | return count; | |
2127 | } | |
eebce385 | 2128 | read_unlock_bh(&iucv_connection_rwlock); |
1da177e4 LT |
2129 | IUCV_DBF_TEXT(data, 2, "remove_write: unknown device\n"); |
2130 | return -EINVAL; | |
2131 | } | |
36369569 | 2132 | static DRIVER_ATTR_WO(remove); |
1da177e4 | 2133 | |
eebce385 MS |
2134 | static struct attribute * netiucv_drv_attrs[] = { |
2135 | &driver_attr_connection.attr, | |
2136 | &driver_attr_remove.attr, | |
2137 | NULL, | |
2138 | }; | |
2139 | ||
2140 | static struct attribute_group netiucv_drv_attr_group = { | |
2141 | .attrs = netiucv_drv_attrs, | |
2142 | }; | |
2143 | ||
a4dbd674 | 2144 | static const struct attribute_group *netiucv_drv_attr_groups[] = { |
5b88feb1 CH |
2145 | &netiucv_drv_attr_group, |
2146 | NULL, | |
2147 | }; | |
2148 | ||
eebce385 | 2149 | static void netiucv_banner(void) |
1da177e4 | 2150 | { |
8f7c502c | 2151 | pr_info("driver initialized\n"); |
1da177e4 LT |
2152 | } |
2153 | ||
eebce385 | 2154 | static void __exit netiucv_exit(void) |
1da177e4 | 2155 | { |
eebce385 MS |
2156 | struct iucv_connection *cp; |
2157 | struct net_device *ndev; | |
2158 | struct netiucv_priv *priv; | |
2159 | struct device *dev; | |
2160 | ||
2a2cf6b1 | 2161 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 MS |
2162 | while (!list_empty(&iucv_connection_list)) { |
2163 | cp = list_entry(iucv_connection_list.next, | |
2164 | struct iucv_connection, list); | |
eebce385 MS |
2165 | ndev = cp->netdev; |
2166 | priv = netdev_priv(ndev); | |
2167 | dev = priv->dev; | |
1da177e4 LT |
2168 | |
2169 | unregister_netdev(ndev); | |
2170 | netiucv_unregister_device(dev); | |
2171 | } | |
2172 | ||
1175b257 | 2173 | device_unregister(netiucv_dev); |
1da177e4 | 2174 | driver_unregister(&netiucv_driver); |
eebce385 | 2175 | iucv_unregister(&netiucv_handler, 1); |
1da177e4 LT |
2176 | iucv_unregister_dbf_views(); |
2177 | ||
8f7c502c | 2178 | pr_info("driver unloaded\n"); |
1da177e4 LT |
2179 | return; |
2180 | } | |
2181 | ||
eebce385 | 2182 | static int __init netiucv_init(void) |
1da177e4 | 2183 | { |
eebce385 | 2184 | int rc; |
e82b0f2c | 2185 | |
eebce385 MS |
2186 | rc = iucv_register_dbf_views(); |
2187 | if (rc) | |
2188 | goto out; | |
2189 | rc = iucv_register(&netiucv_handler, 1); | |
2190 | if (rc) | |
2191 | goto out_dbf; | |
2a2cf6b1 | 2192 | IUCV_DBF_TEXT(trace, 3, __func__); |
0a0a8310 | 2193 | netiucv_driver.groups = netiucv_drv_attr_groups; |
eebce385 MS |
2194 | rc = driver_register(&netiucv_driver); |
2195 | if (rc) { | |
eebce385 MS |
2196 | IUCV_DBF_TEXT_(setup, 2, "ret %d from driver_register\n", rc); |
2197 | goto out_iucv; | |
1da177e4 | 2198 | } |
1175b257 UB |
2199 | /* establish dummy device */ |
2200 | netiucv_dev = kzalloc(sizeof(struct device), GFP_KERNEL); | |
2201 | if (!netiucv_dev) { | |
2202 | rc = -ENOMEM; | |
2203 | goto out_driver; | |
2204 | } | |
2205 | dev_set_name(netiucv_dev, "netiucv"); | |
2206 | netiucv_dev->bus = &iucv_bus; | |
2207 | netiucv_dev->parent = iucv_root; | |
2208 | netiucv_dev->release = (void (*)(struct device *))kfree; | |
2209 | netiucv_dev->driver = &netiucv_driver; | |
2210 | rc = device_register(netiucv_dev); | |
c6304933 SO |
2211 | if (rc) { |
2212 | put_device(netiucv_dev); | |
1175b257 | 2213 | goto out_driver; |
c6304933 | 2214 | } |
eebce385 MS |
2215 | netiucv_banner(); |
2216 | return rc; | |
2217 | ||
1175b257 UB |
2218 | out_driver: |
2219 | driver_unregister(&netiucv_driver); | |
eebce385 MS |
2220 | out_iucv: |
2221 | iucv_unregister(&netiucv_handler, 1); | |
2222 | out_dbf: | |
2223 | iucv_unregister_dbf_views(); | |
2224 | out: | |
2225 | return rc; | |
1da177e4 | 2226 | } |
e82b0f2c | 2227 | |
1da177e4 LT |
2228 | module_init(netiucv_init); |
2229 | module_exit(netiucv_exit); | |
2230 | MODULE_LICENSE("GPL"); |