Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * IUCV network driver |
3 | * | |
1175b257 | 4 | * Copyright IBM Corp. 2001, 2009 |
1da177e4 | 5 | * |
1175b257 UB |
6 | * Author(s): |
7 | * Original netiucv driver: | |
8 | * Fritz Elfert (elfert@de.ibm.com, felfert@millenux.com) | |
9 | * Sysfs integration and all bugs therein: | |
10 | * Cornelia Huck (cornelia.huck@de.ibm.com) | |
11 | * PM functions: | |
12 | * Ursula Braun (ursula.braun@de.ibm.com) | |
1da177e4 LT |
13 | * |
14 | * Documentation used: | |
15 | * the source of the original IUCV driver by: | |
16 | * Stefan Hegewald <hegewald@de.ibm.com> | |
17 | * Hartmut Penner <hpenner@de.ibm.com> | |
18 | * Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) | |
19 | * Martin Schwidefsky (schwidefsky@de.ibm.com) | |
20 | * Alan Altmark (Alan_Altmark@us.ibm.com) Sept. 2000 | |
21 | * | |
22 | * This program is free software; you can redistribute it and/or modify | |
23 | * it under the terms of the GNU General Public License as published by | |
24 | * the Free Software Foundation; either version 2, or (at your option) | |
25 | * any later version. | |
26 | * | |
27 | * This program is distributed in the hope that it will be useful, | |
28 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
29 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
30 | * GNU General Public License for more details. | |
31 | * | |
32 | * You should have received a copy of the GNU General Public License | |
33 | * along with this program; if not, write to the Free Software | |
34 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
35 | * | |
1da177e4 | 36 | */ |
e82b0f2c | 37 | |
8f7c502c UB |
38 | #define KMSG_COMPONENT "netiucv" |
39 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
40 | ||
1da177e4 LT |
41 | #undef DEBUG |
42 | ||
43 | #include <linux/module.h> | |
44 | #include <linux/init.h> | |
45 | #include <linux/kernel.h> | |
46 | #include <linux/slab.h> | |
47 | #include <linux/errno.h> | |
48 | #include <linux/types.h> | |
49 | #include <linux/interrupt.h> | |
50 | #include <linux/timer.h> | |
1da177e4 LT |
51 | #include <linux/bitops.h> |
52 | ||
53 | #include <linux/signal.h> | |
54 | #include <linux/string.h> | |
55 | #include <linux/device.h> | |
56 | ||
57 | #include <linux/ip.h> | |
58 | #include <linux/if_arp.h> | |
59 | #include <linux/tcp.h> | |
60 | #include <linux/skbuff.h> | |
61 | #include <linux/ctype.h> | |
62 | #include <net/dst.h> | |
63 | ||
64 | #include <asm/io.h> | |
65 | #include <asm/uaccess.h> | |
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 | ||
eebce385 MS |
152 | static int netiucv_callback_connreq(struct iucv_path *, |
153 | u8 ipvmid[8], u8 ipuser[16]); | |
154 | static void netiucv_callback_connack(struct iucv_path *, u8 ipuser[16]); | |
155 | static void netiucv_callback_connrej(struct iucv_path *, u8 ipuser[16]); | |
156 | static void netiucv_callback_connsusp(struct iucv_path *, u8 ipuser[16]); | |
157 | static void netiucv_callback_connres(struct iucv_path *, u8 ipuser[16]); | |
158 | static void netiucv_callback_rx(struct iucv_path *, struct iucv_message *); | |
159 | static void netiucv_callback_txdone(struct iucv_path *, struct iucv_message *); | |
160 | ||
161 | static struct iucv_handler netiucv_handler = { | |
162 | .path_pending = netiucv_callback_connreq, | |
163 | .path_complete = netiucv_callback_connack, | |
164 | .path_severed = netiucv_callback_connrej, | |
165 | .path_quiesced = netiucv_callback_connsusp, | |
166 | .path_resumed = netiucv_callback_connres, | |
167 | .message_pending = netiucv_callback_rx, | |
168 | .message_complete = netiucv_callback_txdone | |
169 | }; | |
170 | ||
1da177e4 LT |
171 | /** |
172 | * Per connection profiling data | |
173 | */ | |
174 | struct connection_profile { | |
175 | unsigned long maxmulti; | |
176 | unsigned long maxcqueue; | |
177 | unsigned long doios_single; | |
178 | unsigned long doios_multi; | |
179 | unsigned long txlen; | |
180 | unsigned long tx_time; | |
181 | struct timespec send_stamp; | |
182 | unsigned long tx_pending; | |
183 | unsigned long tx_max_pending; | |
184 | }; | |
185 | ||
186 | /** | |
187 | * Representation of one iucv connection | |
188 | */ | |
189 | struct iucv_connection { | |
eebce385 MS |
190 | struct list_head list; |
191 | struct iucv_path *path; | |
1da177e4 LT |
192 | struct sk_buff *rx_buff; |
193 | struct sk_buff *tx_buff; | |
194 | struct sk_buff_head collect_queue; | |
195 | struct sk_buff_head commit_queue; | |
196 | spinlock_t collect_lock; | |
197 | int collect_len; | |
198 | int max_buffsize; | |
199 | fsm_timer timer; | |
200 | fsm_instance *fsm; | |
201 | struct net_device *netdev; | |
202 | struct connection_profile prof; | |
203 | char userid[9]; | |
08e3356c | 204 | char userdata[17]; |
1da177e4 LT |
205 | }; |
206 | ||
207 | /** | |
208 | * Linked list of all connection structs. | |
209 | */ | |
c11ca97e | 210 | static LIST_HEAD(iucv_connection_list); |
bfac0d0b | 211 | static DEFINE_RWLOCK(iucv_connection_rwlock); |
1da177e4 LT |
212 | |
213 | /** | |
214 | * Representation of event-data for the | |
215 | * connection state machine. | |
216 | */ | |
217 | struct iucv_event { | |
218 | struct iucv_connection *conn; | |
219 | void *data; | |
220 | }; | |
221 | ||
222 | /** | |
223 | * Private part of the network device structure | |
224 | */ | |
225 | struct netiucv_priv { | |
226 | struct net_device_stats stats; | |
227 | unsigned long tbusy; | |
228 | fsm_instance *fsm; | |
229 | struct iucv_connection *conn; | |
230 | struct device *dev; | |
1175b257 | 231 | int pm_state; |
1da177e4 LT |
232 | }; |
233 | ||
234 | /** | |
235 | * Link level header for a packet. | |
236 | */ | |
eebce385 MS |
237 | struct ll_header { |
238 | u16 next; | |
239 | }; | |
1da177e4 | 240 | |
eebce385 | 241 | #define NETIUCV_HDRLEN (sizeof(struct ll_header)) |
08e3356c | 242 | #define NETIUCV_BUFSIZE_MAX 65537 |
1da177e4 LT |
243 | #define NETIUCV_BUFSIZE_DEFAULT NETIUCV_BUFSIZE_MAX |
244 | #define NETIUCV_MTU_MAX (NETIUCV_BUFSIZE_MAX - NETIUCV_HDRLEN) | |
245 | #define NETIUCV_MTU_DEFAULT 9216 | |
246 | #define NETIUCV_QUEUELEN_DEFAULT 50 | |
247 | #define NETIUCV_TIMEOUT_5SEC 5000 | |
248 | ||
249 | /** | |
250 | * Compatibility macros for busy handling | |
251 | * of network devices. | |
252 | */ | |
eebce385 | 253 | static inline void netiucv_clear_busy(struct net_device *dev) |
1da177e4 | 254 | { |
eebce385 MS |
255 | struct netiucv_priv *priv = netdev_priv(dev); |
256 | clear_bit(0, &priv->tbusy); | |
1da177e4 LT |
257 | netif_wake_queue(dev); |
258 | } | |
259 | ||
eebce385 | 260 | static inline int netiucv_test_and_set_busy(struct net_device *dev) |
1da177e4 | 261 | { |
eebce385 | 262 | struct netiucv_priv *priv = netdev_priv(dev); |
1da177e4 | 263 | netif_stop_queue(dev); |
eebce385 | 264 | return test_and_set_bit(0, &priv->tbusy); |
1da177e4 LT |
265 | } |
266 | ||
08e3356c UB |
267 | static u8 iucvMagic_ascii[16] = { |
268 | 0x30, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, | |
269 | 0x30, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20 | |
270 | }; | |
271 | ||
272 | static u8 iucvMagic_ebcdic[16] = { | |
1da177e4 LT |
273 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, |
274 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40 | |
275 | }; | |
276 | ||
1da177e4 LT |
277 | /** |
278 | * Convert an iucv userId to its printable | |
279 | * form (strip whitespace at end). | |
280 | * | |
281 | * @param An iucv userId | |
282 | * | |
283 | * @returns The printable string (static data!!) | |
284 | */ | |
08e3356c | 285 | static char *netiucv_printname(char *name, int len) |
1da177e4 | 286 | { |
08e3356c | 287 | static char tmp[17]; |
1da177e4 | 288 | char *p = tmp; |
08e3356c UB |
289 | memcpy(tmp, name, len); |
290 | tmp[len] = '\0'; | |
291 | while (*p && ((p - tmp) < len) && (!isspace(*p))) | |
1da177e4 LT |
292 | p++; |
293 | *p = '\0'; | |
294 | return tmp; | |
295 | } | |
e82b0f2c | 296 | |
08e3356c UB |
297 | static char *netiucv_printuser(struct iucv_connection *conn) |
298 | { | |
299 | static char tmp_uid[9]; | |
300 | static char tmp_udat[17]; | |
301 | static char buf[100]; | |
302 | ||
303 | if (memcmp(conn->userdata, iucvMagic_ebcdic, 16)) { | |
304 | tmp_uid[8] = '\0'; | |
305 | tmp_udat[16] = '\0'; | |
306 | memcpy(tmp_uid, conn->userid, 8); | |
307 | memcpy(tmp_uid, netiucv_printname(tmp_uid, 8), 8); | |
308 | memcpy(tmp_udat, conn->userdata, 16); | |
309 | EBCASC(tmp_udat, 16); | |
310 | memcpy(tmp_udat, netiucv_printname(tmp_udat, 16), 16); | |
311 | sprintf(buf, "%s.%s", tmp_uid, tmp_udat); | |
312 | return buf; | |
313 | } else | |
314 | return netiucv_printname(conn->userid, 8); | |
315 | } | |
316 | ||
1da177e4 LT |
317 | /** |
318 | * States of the interface statemachine. | |
319 | */ | |
320 | enum dev_states { | |
321 | DEV_STATE_STOPPED, | |
322 | DEV_STATE_STARTWAIT, | |
323 | DEV_STATE_STOPWAIT, | |
324 | DEV_STATE_RUNNING, | |
325 | /** | |
326 | * MUST be always the last element!! | |
327 | */ | |
328 | NR_DEV_STATES | |
329 | }; | |
330 | ||
331 | static const char *dev_state_names[] = { | |
332 | "Stopped", | |
333 | "StartWait", | |
334 | "StopWait", | |
335 | "Running", | |
336 | }; | |
337 | ||
338 | /** | |
339 | * Events of the interface statemachine. | |
340 | */ | |
341 | enum dev_events { | |
342 | DEV_EVENT_START, | |
343 | DEV_EVENT_STOP, | |
344 | DEV_EVENT_CONUP, | |
345 | DEV_EVENT_CONDOWN, | |
346 | /** | |
347 | * MUST be always the last element!! | |
348 | */ | |
349 | NR_DEV_EVENTS | |
350 | }; | |
351 | ||
352 | static const char *dev_event_names[] = { | |
353 | "Start", | |
354 | "Stop", | |
355 | "Connection up", | |
356 | "Connection down", | |
357 | }; | |
e82b0f2c | 358 | |
1da177e4 LT |
359 | /** |
360 | * Events of the connection statemachine | |
361 | */ | |
362 | enum conn_events { | |
363 | /** | |
364 | * Events, representing callbacks from | |
365 | * lowlevel iucv layer) | |
366 | */ | |
367 | CONN_EVENT_CONN_REQ, | |
368 | CONN_EVENT_CONN_ACK, | |
369 | CONN_EVENT_CONN_REJ, | |
370 | CONN_EVENT_CONN_SUS, | |
371 | CONN_EVENT_CONN_RES, | |
372 | CONN_EVENT_RX, | |
373 | CONN_EVENT_TXDONE, | |
374 | ||
375 | /** | |
376 | * Events, representing errors return codes from | |
377 | * calls to lowlevel iucv layer | |
378 | */ | |
379 | ||
380 | /** | |
381 | * Event, representing timer expiry. | |
382 | */ | |
383 | CONN_EVENT_TIMER, | |
384 | ||
385 | /** | |
386 | * Events, representing commands from upper levels. | |
387 | */ | |
388 | CONN_EVENT_START, | |
389 | CONN_EVENT_STOP, | |
390 | ||
391 | /** | |
392 | * MUST be always the last element!! | |
393 | */ | |
394 | NR_CONN_EVENTS, | |
395 | }; | |
396 | ||
397 | static const char *conn_event_names[] = { | |
398 | "Remote connection request", | |
399 | "Remote connection acknowledge", | |
400 | "Remote connection reject", | |
401 | "Connection suspended", | |
402 | "Connection resumed", | |
403 | "Data received", | |
404 | "Data sent", | |
405 | ||
406 | "Timer", | |
407 | ||
408 | "Start", | |
409 | "Stop", | |
410 | }; | |
411 | ||
412 | /** | |
413 | * States of the connection statemachine. | |
414 | */ | |
415 | enum conn_states { | |
416 | /** | |
417 | * Connection not assigned to any device, | |
418 | * initial state, invalid | |
419 | */ | |
420 | CONN_STATE_INVALID, | |
421 | ||
422 | /** | |
423 | * Userid assigned but not operating | |
424 | */ | |
425 | CONN_STATE_STOPPED, | |
426 | ||
427 | /** | |
428 | * Connection registered, | |
429 | * no connection request sent yet, | |
430 | * no connection request received | |
431 | */ | |
432 | CONN_STATE_STARTWAIT, | |
433 | ||
434 | /** | |
435 | * Connection registered and connection request sent, | |
436 | * no acknowledge and no connection request received yet. | |
437 | */ | |
438 | CONN_STATE_SETUPWAIT, | |
439 | ||
440 | /** | |
441 | * Connection up and running idle | |
442 | */ | |
443 | CONN_STATE_IDLE, | |
444 | ||
445 | /** | |
446 | * Data sent, awaiting CONN_EVENT_TXDONE | |
447 | */ | |
448 | CONN_STATE_TX, | |
449 | ||
450 | /** | |
451 | * Error during registration. | |
452 | */ | |
453 | CONN_STATE_REGERR, | |
454 | ||
455 | /** | |
456 | * Error during registration. | |
457 | */ | |
458 | CONN_STATE_CONNERR, | |
459 | ||
460 | /** | |
461 | * MUST be always the last element!! | |
462 | */ | |
463 | NR_CONN_STATES, | |
464 | }; | |
465 | ||
466 | static const char *conn_state_names[] = { | |
467 | "Invalid", | |
468 | "Stopped", | |
469 | "StartWait", | |
470 | "SetupWait", | |
471 | "Idle", | |
472 | "TX", | |
473 | "Terminating", | |
474 | "Registration error", | |
475 | "Connect error", | |
476 | }; | |
477 | ||
e82b0f2c | 478 | |
1da177e4 LT |
479 | /** |
480 | * Debug Facility Stuff | |
481 | */ | |
482 | static debug_info_t *iucv_dbf_setup = NULL; | |
483 | static debug_info_t *iucv_dbf_data = NULL; | |
484 | static debug_info_t *iucv_dbf_trace = NULL; | |
485 | ||
486 | DEFINE_PER_CPU(char[256], iucv_dbf_txt_buf); | |
487 | ||
eebce385 | 488 | static void iucv_unregister_dbf_views(void) |
1da177e4 LT |
489 | { |
490 | if (iucv_dbf_setup) | |
491 | debug_unregister(iucv_dbf_setup); | |
492 | if (iucv_dbf_data) | |
493 | debug_unregister(iucv_dbf_data); | |
494 | if (iucv_dbf_trace) | |
495 | debug_unregister(iucv_dbf_trace); | |
496 | } | |
eebce385 | 497 | static int iucv_register_dbf_views(void) |
1da177e4 LT |
498 | { |
499 | iucv_dbf_setup = debug_register(IUCV_DBF_SETUP_NAME, | |
66a464db | 500 | IUCV_DBF_SETUP_PAGES, |
1da177e4 LT |
501 | IUCV_DBF_SETUP_NR_AREAS, |
502 | IUCV_DBF_SETUP_LEN); | |
503 | iucv_dbf_data = debug_register(IUCV_DBF_DATA_NAME, | |
66a464db | 504 | IUCV_DBF_DATA_PAGES, |
1da177e4 LT |
505 | IUCV_DBF_DATA_NR_AREAS, |
506 | IUCV_DBF_DATA_LEN); | |
507 | iucv_dbf_trace = debug_register(IUCV_DBF_TRACE_NAME, | |
66a464db | 508 | IUCV_DBF_TRACE_PAGES, |
1da177e4 LT |
509 | IUCV_DBF_TRACE_NR_AREAS, |
510 | IUCV_DBF_TRACE_LEN); | |
511 | ||
512 | if ((iucv_dbf_setup == NULL) || (iucv_dbf_data == NULL) || | |
513 | (iucv_dbf_trace == NULL)) { | |
514 | iucv_unregister_dbf_views(); | |
515 | return -ENOMEM; | |
516 | } | |
517 | debug_register_view(iucv_dbf_setup, &debug_hex_ascii_view); | |
518 | debug_set_level(iucv_dbf_setup, IUCV_DBF_SETUP_LEVEL); | |
519 | ||
520 | debug_register_view(iucv_dbf_data, &debug_hex_ascii_view); | |
521 | debug_set_level(iucv_dbf_data, IUCV_DBF_DATA_LEVEL); | |
522 | ||
523 | debug_register_view(iucv_dbf_trace, &debug_hex_ascii_view); | |
524 | debug_set_level(iucv_dbf_trace, IUCV_DBF_TRACE_LEVEL); | |
525 | ||
526 | return 0; | |
527 | } | |
528 | ||
eebce385 | 529 | /* |
1da177e4 | 530 | * Callback-wrappers, called from lowlevel iucv layer. |
eebce385 | 531 | */ |
1da177e4 | 532 | |
eebce385 MS |
533 | static void netiucv_callback_rx(struct iucv_path *path, |
534 | struct iucv_message *msg) | |
1da177e4 | 535 | { |
eebce385 | 536 | struct iucv_connection *conn = path->private; |
1da177e4 LT |
537 | struct iucv_event ev; |
538 | ||
539 | ev.conn = conn; | |
eebce385 | 540 | ev.data = msg; |
1da177e4 LT |
541 | fsm_event(conn->fsm, CONN_EVENT_RX, &ev); |
542 | } | |
543 | ||
eebce385 MS |
544 | static void netiucv_callback_txdone(struct iucv_path *path, |
545 | struct iucv_message *msg) | |
1da177e4 | 546 | { |
eebce385 | 547 | struct iucv_connection *conn = path->private; |
1da177e4 LT |
548 | struct iucv_event ev; |
549 | ||
550 | ev.conn = conn; | |
eebce385 | 551 | ev.data = msg; |
1da177e4 LT |
552 | fsm_event(conn->fsm, CONN_EVENT_TXDONE, &ev); |
553 | } | |
554 | ||
eebce385 | 555 | static void netiucv_callback_connack(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 556 | { |
eebce385 | 557 | struct iucv_connection *conn = path->private; |
1da177e4 | 558 | |
eebce385 | 559 | fsm_event(conn->fsm, CONN_EVENT_CONN_ACK, conn); |
1da177e4 LT |
560 | } |
561 | ||
eebce385 MS |
562 | static int netiucv_callback_connreq(struct iucv_path *path, |
563 | u8 ipvmid[8], u8 ipuser[16]) | |
1da177e4 | 564 | { |
eebce385 | 565 | struct iucv_connection *conn = path->private; |
1da177e4 | 566 | struct iucv_event ev; |
08e3356c UB |
567 | static char tmp_user[9]; |
568 | static char tmp_udat[17]; | |
eebce385 | 569 | int rc; |
1da177e4 | 570 | |
eebce385 | 571 | rc = -EINVAL; |
08e3356c UB |
572 | memcpy(tmp_user, netiucv_printname(ipvmid, 8), 8); |
573 | memcpy(tmp_udat, ipuser, 16); | |
574 | EBCASC(tmp_udat, 16); | |
eebce385 MS |
575 | read_lock_bh(&iucv_connection_rwlock); |
576 | list_for_each_entry(conn, &iucv_connection_list, list) { | |
08e3356c UB |
577 | if (strncmp(ipvmid, conn->userid, 8) || |
578 | strncmp(ipuser, conn->userdata, 16)) | |
eebce385 MS |
579 | continue; |
580 | /* Found a matching connection for this path. */ | |
581 | conn->path = path; | |
582 | ev.conn = conn; | |
583 | ev.data = path; | |
584 | fsm_event(conn->fsm, CONN_EVENT_CONN_REQ, &ev); | |
585 | rc = 0; | |
586 | } | |
08e3356c UB |
587 | IUCV_DBF_TEXT_(setup, 2, "Connection requested for %s.%s\n", |
588 | tmp_user, netiucv_printname(tmp_udat, 16)); | |
eebce385 MS |
589 | read_unlock_bh(&iucv_connection_rwlock); |
590 | return rc; | |
1da177e4 LT |
591 | } |
592 | ||
eebce385 | 593 | static void netiucv_callback_connrej(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 594 | { |
eebce385 | 595 | struct iucv_connection *conn = path->private; |
1da177e4 | 596 | |
eebce385 | 597 | fsm_event(conn->fsm, CONN_EVENT_CONN_REJ, conn); |
1da177e4 LT |
598 | } |
599 | ||
eebce385 | 600 | static void netiucv_callback_connsusp(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 601 | { |
eebce385 | 602 | struct iucv_connection *conn = path->private; |
1da177e4 | 603 | |
eebce385 | 604 | fsm_event(conn->fsm, CONN_EVENT_CONN_SUS, conn); |
1da177e4 LT |
605 | } |
606 | ||
eebce385 | 607 | static void netiucv_callback_connres(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 608 | { |
eebce385 | 609 | struct iucv_connection *conn = path->private; |
1da177e4 | 610 | |
eebce385 MS |
611 | fsm_event(conn->fsm, CONN_EVENT_CONN_RES, conn); |
612 | } | |
1da177e4 LT |
613 | |
614 | /** | |
21b26f2f | 615 | * NOP action for statemachines |
1da177e4 | 616 | */ |
21b26f2f | 617 | static void netiucv_action_nop(fsm_instance *fi, int event, void *arg) |
1da177e4 LT |
618 | { |
619 | } | |
e82b0f2c | 620 | |
eebce385 | 621 | /* |
1da177e4 | 622 | * Actions of the connection statemachine |
eebce385 | 623 | */ |
1da177e4 LT |
624 | |
625 | /** | |
eebce385 MS |
626 | * netiucv_unpack_skb |
627 | * @conn: The connection where this skb has been received. | |
628 | * @pskb: The received skb. | |
1da177e4 | 629 | * |
eebce385 MS |
630 | * Unpack a just received skb and hand it over to upper layers. |
631 | * Helper function for conn_action_rx. | |
1da177e4 | 632 | */ |
eebce385 MS |
633 | static void netiucv_unpack_skb(struct iucv_connection *conn, |
634 | struct sk_buff *pskb) | |
1da177e4 LT |
635 | { |
636 | struct net_device *dev = conn->netdev; | |
eebce385 MS |
637 | struct netiucv_priv *privptr = netdev_priv(dev); |
638 | u16 offset = 0; | |
1da177e4 LT |
639 | |
640 | skb_put(pskb, NETIUCV_HDRLEN); | |
641 | pskb->dev = dev; | |
642 | pskb->ip_summed = CHECKSUM_NONE; | |
643 | pskb->protocol = ntohs(ETH_P_IP); | |
644 | ||
645 | while (1) { | |
646 | struct sk_buff *skb; | |
eebce385 | 647 | struct ll_header *header = (struct ll_header *) pskb->data; |
1da177e4 LT |
648 | |
649 | if (!header->next) | |
650 | break; | |
651 | ||
652 | skb_pull(pskb, NETIUCV_HDRLEN); | |
653 | header->next -= offset; | |
654 | offset += header->next; | |
655 | header->next -= NETIUCV_HDRLEN; | |
656 | if (skb_tailroom(pskb) < header->next) { | |
1da177e4 LT |
657 | IUCV_DBF_TEXT_(data, 2, "Illegal next field: %d > %d\n", |
658 | header->next, skb_tailroom(pskb)); | |
659 | return; | |
660 | } | |
661 | skb_put(pskb, header->next); | |
459a98ed | 662 | skb_reset_mac_header(pskb); |
1da177e4 LT |
663 | skb = dev_alloc_skb(pskb->len); |
664 | if (!skb) { | |
1da177e4 LT |
665 | IUCV_DBF_TEXT(data, 2, |
666 | "Out of memory in netiucv_unpack_skb\n"); | |
667 | privptr->stats.rx_dropped++; | |
668 | return; | |
669 | } | |
d626f62b ACM |
670 | skb_copy_from_linear_data(pskb, skb_put(skb, pskb->len), |
671 | pskb->len); | |
459a98ed | 672 | skb_reset_mac_header(skb); |
1da177e4 LT |
673 | skb->dev = pskb->dev; |
674 | skb->protocol = pskb->protocol; | |
675 | pskb->ip_summed = CHECKSUM_UNNECESSARY; | |
9b3efc01 JL |
676 | privptr->stats.rx_packets++; |
677 | privptr->stats.rx_bytes += skb->len; | |
1da177e4 LT |
678 | /* |
679 | * Since receiving is always initiated from a tasklet (in iucv.c), | |
680 | * we must use netif_rx_ni() instead of netif_rx() | |
681 | */ | |
682 | netif_rx_ni(skb); | |
1da177e4 LT |
683 | skb_pull(pskb, header->next); |
684 | skb_put(pskb, NETIUCV_HDRLEN); | |
685 | } | |
686 | } | |
687 | ||
eebce385 | 688 | static void conn_action_rx(fsm_instance *fi, int event, void *arg) |
1da177e4 | 689 | { |
eebce385 | 690 | struct iucv_event *ev = arg; |
1da177e4 | 691 | struct iucv_connection *conn = ev->conn; |
eebce385 MS |
692 | struct iucv_message *msg = ev->data; |
693 | struct netiucv_priv *privptr = netdev_priv(conn->netdev); | |
1da177e4 LT |
694 | int rc; |
695 | ||
2a2cf6b1 | 696 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
697 | |
698 | if (!conn->netdev) { | |
eebce385 | 699 | iucv_message_reject(conn->path, msg); |
1da177e4 | 700 | IUCV_DBF_TEXT(data, 2, |
eebce385 | 701 | "Received data for unlinked connection\n"); |
1da177e4 LT |
702 | return; |
703 | } | |
eebce385 MS |
704 | if (msg->length > conn->max_buffsize) { |
705 | iucv_message_reject(conn->path, msg); | |
1da177e4 | 706 | privptr->stats.rx_dropped++; |
1da177e4 | 707 | IUCV_DBF_TEXT_(data, 2, "msglen %d > max_buffsize %d\n", |
eebce385 | 708 | msg->length, conn->max_buffsize); |
1da177e4 LT |
709 | return; |
710 | } | |
27a884dc ACM |
711 | conn->rx_buff->data = conn->rx_buff->head; |
712 | skb_reset_tail_pointer(conn->rx_buff); | |
1da177e4 | 713 | conn->rx_buff->len = 0; |
eebce385 MS |
714 | rc = iucv_message_receive(conn->path, msg, 0, conn->rx_buff->data, |
715 | msg->length, NULL); | |
716 | if (rc || msg->length < 5) { | |
1da177e4 | 717 | privptr->stats.rx_errors++; |
1da177e4 LT |
718 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_receive\n", rc); |
719 | return; | |
720 | } | |
721 | netiucv_unpack_skb(conn, conn->rx_buff); | |
722 | } | |
723 | ||
eebce385 | 724 | static void conn_action_txdone(fsm_instance *fi, int event, void *arg) |
1da177e4 | 725 | { |
eebce385 | 726 | struct iucv_event *ev = arg; |
1da177e4 | 727 | struct iucv_connection *conn = ev->conn; |
eebce385 MS |
728 | struct iucv_message *msg = ev->data; |
729 | struct iucv_message txmsg; | |
1da177e4 | 730 | struct netiucv_priv *privptr = NULL; |
eebce385 MS |
731 | u32 single_flag = msg->tag; |
732 | u32 txbytes = 0; | |
733 | u32 txpackets = 0; | |
734 | u32 stat_maxcq = 0; | |
1da177e4 LT |
735 | struct sk_buff *skb; |
736 | unsigned long saveflags; | |
eebce385 MS |
737 | struct ll_header header; |
738 | int rc; | |
1da177e4 | 739 | |
2a2cf6b1 | 740 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 | 741 | |
d239ae33 UB |
742 | if (!conn || !conn->netdev) { |
743 | IUCV_DBF_TEXT(data, 2, | |
744 | "Send confirmation for unlinked connection\n"); | |
745 | return; | |
746 | } | |
747 | privptr = netdev_priv(conn->netdev); | |
1da177e4 LT |
748 | conn->prof.tx_pending--; |
749 | if (single_flag) { | |
750 | if ((skb = skb_dequeue(&conn->commit_queue))) { | |
751 | atomic_dec(&skb->users); | |
1da177e4 LT |
752 | if (privptr) { |
753 | privptr->stats.tx_packets++; | |
754 | privptr->stats.tx_bytes += | |
755 | (skb->len - NETIUCV_HDRLEN | |
998221c2 | 756 | - NETIUCV_HDRLEN); |
1da177e4 | 757 | } |
998221c2 | 758 | dev_kfree_skb_any(skb); |
1da177e4 LT |
759 | } |
760 | } | |
27a884dc ACM |
761 | conn->tx_buff->data = conn->tx_buff->head; |
762 | skb_reset_tail_pointer(conn->tx_buff); | |
1da177e4 LT |
763 | conn->tx_buff->len = 0; |
764 | spin_lock_irqsave(&conn->collect_lock, saveflags); | |
765 | while ((skb = skb_dequeue(&conn->collect_queue))) { | |
766 | header.next = conn->tx_buff->len + skb->len + NETIUCV_HDRLEN; | |
767 | memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, | |
768 | NETIUCV_HDRLEN); | |
d626f62b ACM |
769 | skb_copy_from_linear_data(skb, |
770 | skb_put(conn->tx_buff, skb->len), | |
771 | skb->len); | |
1da177e4 LT |
772 | txbytes += skb->len; |
773 | txpackets++; | |
774 | stat_maxcq++; | |
775 | atomic_dec(&skb->users); | |
776 | dev_kfree_skb_any(skb); | |
777 | } | |
778 | if (conn->collect_len > conn->prof.maxmulti) | |
779 | conn->prof.maxmulti = conn->collect_len; | |
780 | conn->collect_len = 0; | |
781 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); | |
eebce385 MS |
782 | if (conn->tx_buff->len == 0) { |
783 | fsm_newstate(fi, CONN_STATE_IDLE); | |
784 | return; | |
785 | } | |
1da177e4 | 786 | |
eebce385 MS |
787 | header.next = 0; |
788 | memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
2c6b47de | 789 | conn->prof.send_stamp = current_kernel_time(); |
eebce385 MS |
790 | txmsg.class = 0; |
791 | txmsg.tag = 0; | |
792 | rc = iucv_message_send(conn->path, &txmsg, 0, 0, | |
1da177e4 | 793 | conn->tx_buff->data, conn->tx_buff->len); |
eebce385 MS |
794 | conn->prof.doios_multi++; |
795 | conn->prof.txlen += conn->tx_buff->len; | |
796 | conn->prof.tx_pending++; | |
797 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) | |
798 | conn->prof.tx_max_pending = conn->prof.tx_pending; | |
799 | if (rc) { | |
800 | conn->prof.tx_pending--; | |
1da177e4 | 801 | fsm_newstate(fi, CONN_STATE_IDLE); |
eebce385 MS |
802 | if (privptr) |
803 | privptr->stats.tx_errors += txpackets; | |
eebce385 MS |
804 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); |
805 | } else { | |
806 | if (privptr) { | |
807 | privptr->stats.tx_packets += txpackets; | |
808 | privptr->stats.tx_bytes += txbytes; | |
809 | } | |
810 | if (stat_maxcq > conn->prof.maxcqueue) | |
811 | conn->prof.maxcqueue = stat_maxcq; | |
812 | } | |
1da177e4 LT |
813 | } |
814 | ||
eebce385 | 815 | static void conn_action_connaccept(fsm_instance *fi, int event, void *arg) |
1da177e4 | 816 | { |
eebce385 | 817 | struct iucv_event *ev = arg; |
1da177e4 | 818 | struct iucv_connection *conn = ev->conn; |
eebce385 | 819 | struct iucv_path *path = ev->data; |
1da177e4 | 820 | struct net_device *netdev = conn->netdev; |
eebce385 | 821 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 822 | int rc; |
1da177e4 | 823 | |
2a2cf6b1 | 824 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 825 | |
eebce385 MS |
826 | conn->path = path; |
827 | path->msglim = NETIUCV_QUEUELEN_DEFAULT; | |
828 | path->flags = 0; | |
08e3356c | 829 | rc = iucv_path_accept(path, &netiucv_handler, conn->userdata , conn); |
1da177e4 | 830 | if (rc) { |
1da177e4 LT |
831 | IUCV_DBF_TEXT_(setup, 2, "rc %d from iucv_accept", rc); |
832 | return; | |
833 | } | |
834 | fsm_newstate(fi, CONN_STATE_IDLE); | |
eebce385 | 835 | netdev->tx_queue_len = conn->path->msglim; |
1da177e4 LT |
836 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); |
837 | } | |
838 | ||
eebce385 | 839 | static void conn_action_connreject(fsm_instance *fi, int event, void *arg) |
1da177e4 | 840 | { |
eebce385 MS |
841 | struct iucv_event *ev = arg; |
842 | struct iucv_path *path = ev->data; | |
1da177e4 | 843 | |
2a2cf6b1 | 844 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 | 845 | iucv_path_sever(path, NULL); |
1da177e4 LT |
846 | } |
847 | ||
eebce385 | 848 | static void conn_action_connack(fsm_instance *fi, int event, void *arg) |
1da177e4 | 849 | { |
eebce385 | 850 | struct iucv_connection *conn = arg; |
1da177e4 | 851 | struct net_device *netdev = conn->netdev; |
eebce385 | 852 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 853 | |
2a2cf6b1 | 854 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
855 | fsm_deltimer(&conn->timer); |
856 | fsm_newstate(fi, CONN_STATE_IDLE); | |
eebce385 | 857 | netdev->tx_queue_len = conn->path->msglim; |
1da177e4 LT |
858 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); |
859 | } | |
860 | ||
eebce385 | 861 | static void conn_action_conntimsev(fsm_instance *fi, int event, void *arg) |
1da177e4 | 862 | { |
eebce385 | 863 | struct iucv_connection *conn = arg; |
1da177e4 | 864 | |
2a2cf6b1 | 865 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 866 | fsm_deltimer(&conn->timer); |
08e3356c | 867 | iucv_path_sever(conn->path, conn->userdata); |
1da177e4 LT |
868 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
869 | } | |
870 | ||
eebce385 | 871 | static void conn_action_connsever(fsm_instance *fi, int event, void *arg) |
1da177e4 | 872 | { |
eebce385 | 873 | struct iucv_connection *conn = arg; |
1da177e4 | 874 | struct net_device *netdev = conn->netdev; |
eebce385 | 875 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 876 | |
2a2cf6b1 | 877 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
878 | |
879 | fsm_deltimer(&conn->timer); | |
08e3356c UB |
880 | iucv_path_sever(conn->path, conn->userdata); |
881 | dev_info(privptr->dev, "The peer z/VM guest %s has closed the " | |
882 | "connection\n", netiucv_printuser(conn)); | |
1da177e4 | 883 | IUCV_DBF_TEXT(data, 2, |
eebce385 | 884 | "conn_action_connsever: Remote dropped connection\n"); |
1da177e4 LT |
885 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
886 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); | |
887 | } | |
888 | ||
eebce385 | 889 | static void conn_action_start(fsm_instance *fi, int event, void *arg) |
1da177e4 | 890 | { |
eebce385 | 891 | struct iucv_connection *conn = arg; |
8f7c502c UB |
892 | struct net_device *netdev = conn->netdev; |
893 | struct netiucv_priv *privptr = netdev_priv(netdev); | |
1da177e4 LT |
894 | int rc; |
895 | ||
2a2cf6b1 | 896 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 897 | |
eebce385 | 898 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
1da177e4 | 899 | |
eebce385 MS |
900 | /* |
901 | * We must set the state before calling iucv_connect because the | |
902 | * callback handler could be called at any point after the connection | |
903 | * request is sent | |
904 | */ | |
1da177e4 LT |
905 | |
906 | fsm_newstate(fi, CONN_STATE_SETUPWAIT); | |
eebce385 | 907 | conn->path = iucv_path_alloc(NETIUCV_QUEUELEN_DEFAULT, 0, GFP_KERNEL); |
08e3356c UB |
908 | IUCV_DBF_TEXT_(setup, 2, "%s: connecting to %s ...\n", |
909 | netdev->name, netiucv_printuser(conn)); | |
910 | ||
eebce385 | 911 | rc = iucv_path_connect(conn->path, &netiucv_handler, conn->userid, |
08e3356c | 912 | NULL, conn->userdata, conn); |
1da177e4 | 913 | switch (rc) { |
eebce385 | 914 | case 0: |
8f7c502c | 915 | netdev->tx_queue_len = conn->path->msglim; |
eebce385 MS |
916 | fsm_addtimer(&conn->timer, NETIUCV_TIMEOUT_5SEC, |
917 | CONN_EVENT_TIMER, conn); | |
918 | return; | |
919 | case 11: | |
8f7c502c UB |
920 | dev_warn(privptr->dev, |
921 | "The IUCV device failed to connect to z/VM guest %s\n", | |
08e3356c | 922 | netiucv_printname(conn->userid, 8)); |
eebce385 MS |
923 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
924 | break; | |
925 | case 12: | |
8f7c502c UB |
926 | dev_warn(privptr->dev, |
927 | "The IUCV device failed to connect to the peer on z/VM" | |
08e3356c | 928 | " guest %s\n", netiucv_printname(conn->userid, 8)); |
eebce385 MS |
929 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
930 | break; | |
931 | case 13: | |
8f7c502c UB |
932 | dev_err(privptr->dev, |
933 | "Connecting the IUCV device would exceed the maximum" | |
934 | " number of IUCV connections\n"); | |
eebce385 MS |
935 | fsm_newstate(fi, CONN_STATE_CONNERR); |
936 | break; | |
937 | case 14: | |
8f7c502c UB |
938 | dev_err(privptr->dev, |
939 | "z/VM guest %s has too many IUCV connections" | |
940 | " to connect with the IUCV device\n", | |
08e3356c | 941 | netiucv_printname(conn->userid, 8)); |
eebce385 MS |
942 | fsm_newstate(fi, CONN_STATE_CONNERR); |
943 | break; | |
944 | case 15: | |
8f7c502c UB |
945 | dev_err(privptr->dev, |
946 | "The IUCV device cannot connect to a z/VM guest with no" | |
947 | " IUCV authorization\n"); | |
eebce385 MS |
948 | fsm_newstate(fi, CONN_STATE_CONNERR); |
949 | break; | |
950 | default: | |
8f7c502c UB |
951 | dev_err(privptr->dev, |
952 | "Connecting the IUCV device failed with error %d\n", | |
953 | rc); | |
eebce385 MS |
954 | fsm_newstate(fi, CONN_STATE_CONNERR); |
955 | break; | |
1da177e4 LT |
956 | } |
957 | IUCV_DBF_TEXT_(setup, 5, "iucv_connect rc is %d\n", rc); | |
eebce385 MS |
958 | kfree(conn->path); |
959 | conn->path = NULL; | |
1da177e4 LT |
960 | } |
961 | ||
eebce385 | 962 | static void netiucv_purge_skb_queue(struct sk_buff_head *q) |
1da177e4 LT |
963 | { |
964 | struct sk_buff *skb; | |
965 | ||
966 | while ((skb = skb_dequeue(q))) { | |
967 | atomic_dec(&skb->users); | |
968 | dev_kfree_skb_any(skb); | |
969 | } | |
970 | } | |
971 | ||
eebce385 | 972 | static void conn_action_stop(fsm_instance *fi, int event, void *arg) |
1da177e4 | 973 | { |
eebce385 | 974 | struct iucv_event *ev = arg; |
1da177e4 LT |
975 | struct iucv_connection *conn = ev->conn; |
976 | struct net_device *netdev = conn->netdev; | |
eebce385 | 977 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 978 | |
2a2cf6b1 | 979 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
980 | |
981 | fsm_deltimer(&conn->timer); | |
982 | fsm_newstate(fi, CONN_STATE_STOPPED); | |
983 | netiucv_purge_skb_queue(&conn->collect_queue); | |
eebce385 MS |
984 | if (conn->path) { |
985 | IUCV_DBF_TEXT(trace, 5, "calling iucv_path_sever\n"); | |
08e3356c | 986 | iucv_path_sever(conn->path, conn->userdata); |
eebce385 MS |
987 | kfree(conn->path); |
988 | conn->path = NULL; | |
989 | } | |
1da177e4 LT |
990 | netiucv_purge_skb_queue(&conn->commit_queue); |
991 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); | |
992 | } | |
993 | ||
eebce385 | 994 | static void conn_action_inval(fsm_instance *fi, int event, void *arg) |
1da177e4 | 995 | { |
eebce385 | 996 | struct iucv_connection *conn = arg; |
1da177e4 LT |
997 | struct net_device *netdev = conn->netdev; |
998 | ||
f082bcae UB |
999 | IUCV_DBF_TEXT_(data, 2, "%s('%s'): conn_action_inval called\n", |
1000 | netdev->name, conn->userid); | |
1da177e4 LT |
1001 | } |
1002 | ||
1003 | static const fsm_node conn_fsm[] = { | |
1004 | { CONN_STATE_INVALID, CONN_EVENT_START, conn_action_inval }, | |
1005 | { CONN_STATE_STOPPED, CONN_EVENT_START, conn_action_start }, | |
1006 | ||
1007 | { CONN_STATE_STOPPED, CONN_EVENT_STOP, conn_action_stop }, | |
1008 | { CONN_STATE_STARTWAIT, CONN_EVENT_STOP, conn_action_stop }, | |
1009 | { CONN_STATE_SETUPWAIT, CONN_EVENT_STOP, conn_action_stop }, | |
1010 | { CONN_STATE_IDLE, CONN_EVENT_STOP, conn_action_stop }, | |
1011 | { CONN_STATE_TX, CONN_EVENT_STOP, conn_action_stop }, | |
1012 | { CONN_STATE_REGERR, CONN_EVENT_STOP, conn_action_stop }, | |
1013 | { CONN_STATE_CONNERR, CONN_EVENT_STOP, conn_action_stop }, | |
1014 | ||
1015 | { CONN_STATE_STOPPED, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
1016 | { CONN_STATE_STARTWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, | |
1017 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, | |
1018 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
1019 | { CONN_STATE_TX, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
1020 | ||
1021 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_ACK, conn_action_connack }, | |
1022 | { CONN_STATE_SETUPWAIT, CONN_EVENT_TIMER, conn_action_conntimsev }, | |
1023 | ||
1024 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
1025 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
1026 | { CONN_STATE_TX, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
1027 | ||
1028 | { CONN_STATE_IDLE, CONN_EVENT_RX, conn_action_rx }, | |
1029 | { CONN_STATE_TX, CONN_EVENT_RX, conn_action_rx }, | |
1030 | ||
1031 | { CONN_STATE_TX, CONN_EVENT_TXDONE, conn_action_txdone }, | |
1032 | { CONN_STATE_IDLE, CONN_EVENT_TXDONE, conn_action_txdone }, | |
1033 | }; | |
1034 | ||
1035 | static const int CONN_FSM_LEN = sizeof(conn_fsm) / sizeof(fsm_node); | |
1036 | ||
e82b0f2c | 1037 | |
eebce385 | 1038 | /* |
1da177e4 | 1039 | * Actions for interface - statemachine. |
eebce385 | 1040 | */ |
1da177e4 LT |
1041 | |
1042 | /** | |
eebce385 MS |
1043 | * dev_action_start |
1044 | * @fi: An instance of an interface statemachine. | |
1045 | * @event: The event, just happened. | |
1046 | * @arg: Generic pointer, casted from struct net_device * upon call. | |
1da177e4 | 1047 | * |
eebce385 | 1048 | * Startup connection by sending CONN_EVENT_START to it. |
1da177e4 | 1049 | */ |
eebce385 | 1050 | static void dev_action_start(fsm_instance *fi, int event, void *arg) |
1da177e4 | 1051 | { |
eebce385 MS |
1052 | struct net_device *dev = arg; |
1053 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 | 1054 | |
2a2cf6b1 | 1055 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 1056 | |
1da177e4 | 1057 | fsm_newstate(fi, DEV_STATE_STARTWAIT); |
eebce385 | 1058 | fsm_event(privptr->conn->fsm, CONN_EVENT_START, privptr->conn); |
1da177e4 LT |
1059 | } |
1060 | ||
1061 | /** | |
1062 | * Shutdown connection by sending CONN_EVENT_STOP to it. | |
1063 | * | |
1064 | * @param fi An instance of an interface statemachine. | |
1065 | * @param event The event, just happened. | |
1066 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1067 | */ | |
1068 | static void | |
1069 | dev_action_stop(fsm_instance *fi, int event, void *arg) | |
1070 | { | |
eebce385 MS |
1071 | struct net_device *dev = arg; |
1072 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 LT |
1073 | struct iucv_event ev; |
1074 | ||
2a2cf6b1 | 1075 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1076 | |
1077 | ev.conn = privptr->conn; | |
1078 | ||
1079 | fsm_newstate(fi, DEV_STATE_STOPWAIT); | |
1080 | fsm_event(privptr->conn->fsm, CONN_EVENT_STOP, &ev); | |
1081 | } | |
1082 | ||
1083 | /** | |
1084 | * Called from connection statemachine | |
1085 | * when a connection is up and running. | |
1086 | * | |
1087 | * @param fi An instance of an interface statemachine. | |
1088 | * @param event The event, just happened. | |
1089 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1090 | */ | |
1091 | static void | |
1092 | dev_action_connup(fsm_instance *fi, int event, void *arg) | |
1093 | { | |
eebce385 MS |
1094 | struct net_device *dev = arg; |
1095 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 | 1096 | |
2a2cf6b1 | 1097 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1098 | |
1099 | switch (fsm_getstate(fi)) { | |
1100 | case DEV_STATE_STARTWAIT: | |
1101 | fsm_newstate(fi, DEV_STATE_RUNNING); | |
8f7c502c UB |
1102 | dev_info(privptr->dev, |
1103 | "The IUCV device has been connected" | |
08e3356c UB |
1104 | " successfully to %s\n", |
1105 | netiucv_printuser(privptr->conn)); | |
1da177e4 LT |
1106 | IUCV_DBF_TEXT(setup, 3, |
1107 | "connection is up and running\n"); | |
1108 | break; | |
1109 | case DEV_STATE_STOPWAIT: | |
1da177e4 LT |
1110 | IUCV_DBF_TEXT(data, 2, |
1111 | "dev_action_connup: in DEV_STATE_STOPWAIT\n"); | |
1112 | break; | |
1113 | } | |
1114 | } | |
1115 | ||
1116 | /** | |
1117 | * Called from connection statemachine | |
1118 | * when a connection has been shutdown. | |
1119 | * | |
1120 | * @param fi An instance of an interface statemachine. | |
1121 | * @param event The event, just happened. | |
1122 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1123 | */ | |
1124 | static void | |
1125 | dev_action_conndown(fsm_instance *fi, int event, void *arg) | |
1126 | { | |
2a2cf6b1 | 1127 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1128 | |
1129 | switch (fsm_getstate(fi)) { | |
1130 | case DEV_STATE_RUNNING: | |
1131 | fsm_newstate(fi, DEV_STATE_STARTWAIT); | |
1132 | break; | |
1133 | case DEV_STATE_STOPWAIT: | |
1134 | fsm_newstate(fi, DEV_STATE_STOPPED); | |
1135 | IUCV_DBF_TEXT(setup, 3, "connection is down\n"); | |
1136 | break; | |
1137 | } | |
1138 | } | |
1139 | ||
1140 | static const fsm_node dev_fsm[] = { | |
1141 | { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start }, | |
1142 | ||
1143 | { DEV_STATE_STOPWAIT, DEV_EVENT_START, dev_action_start }, | |
1144 | { DEV_STATE_STOPWAIT, DEV_EVENT_CONDOWN, dev_action_conndown }, | |
1145 | ||
1146 | { DEV_STATE_STARTWAIT, DEV_EVENT_STOP, dev_action_stop }, | |
1147 | { DEV_STATE_STARTWAIT, DEV_EVENT_CONUP, dev_action_connup }, | |
1148 | ||
1149 | { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop }, | |
1150 | { DEV_STATE_RUNNING, DEV_EVENT_CONDOWN, dev_action_conndown }, | |
21b26f2f | 1151 | { DEV_STATE_RUNNING, DEV_EVENT_CONUP, netiucv_action_nop }, |
1da177e4 LT |
1152 | }; |
1153 | ||
1154 | static const int DEV_FSM_LEN = sizeof(dev_fsm) / sizeof(fsm_node); | |
1155 | ||
1156 | /** | |
1157 | * Transmit a packet. | |
1158 | * This is a helper function for netiucv_tx(). | |
1159 | * | |
1160 | * @param conn Connection to be used for sending. | |
1161 | * @param skb Pointer to struct sk_buff of packet to send. | |
1162 | * The linklevel header has already been set up | |
1163 | * by netiucv_tx(). | |
1164 | * | |
1165 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1166 | */ | |
eebce385 MS |
1167 | static int netiucv_transmit_skb(struct iucv_connection *conn, |
1168 | struct sk_buff *skb) | |
1169 | { | |
1170 | struct iucv_message msg; | |
1da177e4 | 1171 | unsigned long saveflags; |
eebce385 MS |
1172 | struct ll_header header; |
1173 | int rc; | |
1da177e4 LT |
1174 | |
1175 | if (fsm_getstate(conn->fsm) != CONN_STATE_IDLE) { | |
1176 | int l = skb->len + NETIUCV_HDRLEN; | |
1177 | ||
1178 | spin_lock_irqsave(&conn->collect_lock, saveflags); | |
1179 | if (conn->collect_len + l > | |
1180 | (conn->max_buffsize - NETIUCV_HDRLEN)) { | |
1181 | rc = -EBUSY; | |
1182 | IUCV_DBF_TEXT(data, 2, | |
eebce385 | 1183 | "EBUSY from netiucv_transmit_skb\n"); |
1da177e4 LT |
1184 | } else { |
1185 | atomic_inc(&skb->users); | |
1186 | skb_queue_tail(&conn->collect_queue, skb); | |
1187 | conn->collect_len += l; | |
eebce385 | 1188 | rc = 0; |
1da177e4 LT |
1189 | } |
1190 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); | |
1191 | } else { | |
1192 | struct sk_buff *nskb = skb; | |
1193 | /** | |
1194 | * Copy the skb to a new allocated skb in lowmem only if the | |
1195 | * data is located above 2G in memory or tailroom is < 2. | |
1196 | */ | |
27a884dc ACM |
1197 | unsigned long hi = ((unsigned long)(skb_tail_pointer(skb) + |
1198 | NETIUCV_HDRLEN)) >> 31; | |
1da177e4 LT |
1199 | int copied = 0; |
1200 | if (hi || (skb_tailroom(skb) < 2)) { | |
1201 | nskb = alloc_skb(skb->len + NETIUCV_HDRLEN + | |
1202 | NETIUCV_HDRLEN, GFP_ATOMIC | GFP_DMA); | |
1203 | if (!nskb) { | |
1da177e4 LT |
1204 | IUCV_DBF_TEXT(data, 2, "alloc_skb failed\n"); |
1205 | rc = -ENOMEM; | |
1206 | return rc; | |
1207 | } else { | |
1208 | skb_reserve(nskb, NETIUCV_HDRLEN); | |
1209 | memcpy(skb_put(nskb, skb->len), | |
1210 | skb->data, skb->len); | |
1211 | } | |
1212 | copied = 1; | |
1213 | } | |
1214 | /** | |
1215 | * skb now is below 2G and has enough room. Add headers. | |
1216 | */ | |
1217 | header.next = nskb->len + NETIUCV_HDRLEN; | |
1218 | memcpy(skb_push(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
1219 | header.next = 0; | |
1220 | memcpy(skb_put(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
1221 | ||
1222 | fsm_newstate(conn->fsm, CONN_STATE_TX); | |
2c6b47de | 1223 | conn->prof.send_stamp = current_kernel_time(); |
e82b0f2c | 1224 | |
eebce385 MS |
1225 | msg.tag = 1; |
1226 | msg.class = 0; | |
1227 | rc = iucv_message_send(conn->path, &msg, 0, 0, | |
1228 | nskb->data, nskb->len); | |
1da177e4 LT |
1229 | conn->prof.doios_single++; |
1230 | conn->prof.txlen += skb->len; | |
1231 | conn->prof.tx_pending++; | |
1232 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) | |
1233 | conn->prof.tx_max_pending = conn->prof.tx_pending; | |
1234 | if (rc) { | |
1235 | struct netiucv_priv *privptr; | |
1236 | fsm_newstate(conn->fsm, CONN_STATE_IDLE); | |
1237 | conn->prof.tx_pending--; | |
eebce385 | 1238 | privptr = netdev_priv(conn->netdev); |
1da177e4 LT |
1239 | if (privptr) |
1240 | privptr->stats.tx_errors++; | |
1241 | if (copied) | |
1242 | dev_kfree_skb(nskb); | |
1243 | else { | |
1244 | /** | |
1245 | * Remove our headers. They get added | |
1246 | * again on retransmit. | |
1247 | */ | |
1248 | skb_pull(skb, NETIUCV_HDRLEN); | |
1249 | skb_trim(skb, skb->len - NETIUCV_HDRLEN); | |
1250 | } | |
1da177e4 LT |
1251 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); |
1252 | } else { | |
1253 | if (copied) | |
1254 | dev_kfree_skb(skb); | |
1255 | atomic_inc(&nskb->users); | |
1256 | skb_queue_tail(&conn->commit_queue, nskb); | |
1257 | } | |
1258 | } | |
1259 | ||
1260 | return rc; | |
1261 | } | |
e82b0f2c | 1262 | |
eebce385 | 1263 | /* |
1da177e4 | 1264 | * Interface API for upper network layers |
eebce385 | 1265 | */ |
1da177e4 LT |
1266 | |
1267 | /** | |
1268 | * Open an interface. | |
1269 | * Called from generic network layer when ifconfig up is run. | |
1270 | * | |
1271 | * @param dev Pointer to interface struct. | |
1272 | * | |
1273 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1274 | */ | |
eebce385 MS |
1275 | static int netiucv_open(struct net_device *dev) |
1276 | { | |
1277 | struct netiucv_priv *priv = netdev_priv(dev); | |
1278 | ||
1279 | fsm_event(priv->fsm, DEV_EVENT_START, dev); | |
1da177e4 LT |
1280 | return 0; |
1281 | } | |
1282 | ||
1283 | /** | |
1284 | * Close an interface. | |
1285 | * Called from generic network layer when ifconfig down is run. | |
1286 | * | |
1287 | * @param dev Pointer to interface struct. | |
1288 | * | |
1289 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1290 | */ | |
eebce385 MS |
1291 | static int netiucv_close(struct net_device *dev) |
1292 | { | |
1293 | struct netiucv_priv *priv = netdev_priv(dev); | |
1294 | ||
1295 | fsm_event(priv->fsm, DEV_EVENT_STOP, dev); | |
1da177e4 LT |
1296 | return 0; |
1297 | } | |
1298 | ||
1175b257 UB |
1299 | static int netiucv_pm_prepare(struct device *dev) |
1300 | { | |
1301 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1302 | return 0; | |
1303 | } | |
1304 | ||
1305 | static void netiucv_pm_complete(struct device *dev) | |
1306 | { | |
1307 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1308 | return; | |
1309 | } | |
1310 | ||
1311 | /** | |
1312 | * netiucv_pm_freeze() - Freeze PM callback | |
1313 | * @dev: netiucv device | |
1314 | * | |
1315 | * close open netiucv interfaces | |
1316 | */ | |
1317 | static int netiucv_pm_freeze(struct device *dev) | |
1318 | { | |
4f0076f7 | 1319 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1175b257 UB |
1320 | struct net_device *ndev = NULL; |
1321 | int rc = 0; | |
1322 | ||
1323 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1324 | if (priv && priv->conn) | |
1325 | ndev = priv->conn->netdev; | |
1326 | if (!ndev) | |
1327 | goto out; | |
1328 | netif_device_detach(ndev); | |
1329 | priv->pm_state = fsm_getstate(priv->fsm); | |
1330 | rc = netiucv_close(ndev); | |
1331 | out: | |
1332 | return rc; | |
1333 | } | |
1334 | ||
1335 | /** | |
1336 | * netiucv_pm_restore_thaw() - Thaw and restore PM callback | |
1337 | * @dev: netiucv device | |
1338 | * | |
1339 | * re-open netiucv interfaces closed during freeze | |
1340 | */ | |
1341 | static int netiucv_pm_restore_thaw(struct device *dev) | |
1342 | { | |
4f0076f7 | 1343 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1175b257 UB |
1344 | struct net_device *ndev = NULL; |
1345 | int rc = 0; | |
1346 | ||
1347 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1348 | if (priv && priv->conn) | |
1349 | ndev = priv->conn->netdev; | |
1350 | if (!ndev) | |
1351 | goto out; | |
1352 | switch (priv->pm_state) { | |
1353 | case DEV_STATE_RUNNING: | |
1354 | case DEV_STATE_STARTWAIT: | |
1355 | rc = netiucv_open(ndev); | |
1356 | break; | |
1357 | default: | |
1358 | break; | |
1359 | } | |
1360 | netif_device_attach(ndev); | |
1361 | out: | |
1362 | return rc; | |
1363 | } | |
1364 | ||
1da177e4 LT |
1365 | /** |
1366 | * Start transmission of a packet. | |
1367 | * Called from generic network device layer. | |
1368 | * | |
1369 | * @param skb Pointer to buffer containing the packet. | |
1370 | * @param dev Pointer to interface struct. | |
1371 | * | |
1372 | * @return 0 if packet consumed, !0 if packet rejected. | |
1373 | * Note: If we return !0, then the packet is free'd by | |
1374 | * the generic network layer. | |
1375 | */ | |
1376 | static int netiucv_tx(struct sk_buff *skb, struct net_device *dev) | |
1377 | { | |
eebce385 MS |
1378 | struct netiucv_priv *privptr = netdev_priv(dev); |
1379 | int rc; | |
1da177e4 | 1380 | |
2a2cf6b1 | 1381 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1382 | /** |
1383 | * Some sanity checks ... | |
1384 | */ | |
1385 | if (skb == NULL) { | |
1da177e4 LT |
1386 | IUCV_DBF_TEXT(data, 2, "netiucv_tx: skb is NULL\n"); |
1387 | privptr->stats.tx_dropped++; | |
ec634fe3 | 1388 | return NETDEV_TX_OK; |
1da177e4 LT |
1389 | } |
1390 | if (skb_headroom(skb) < NETIUCV_HDRLEN) { | |
1da177e4 LT |
1391 | IUCV_DBF_TEXT(data, 2, |
1392 | "netiucv_tx: skb_headroom < NETIUCV_HDRLEN\n"); | |
1393 | dev_kfree_skb(skb); | |
1394 | privptr->stats.tx_dropped++; | |
ec634fe3 | 1395 | return NETDEV_TX_OK; |
1da177e4 LT |
1396 | } |
1397 | ||
1398 | /** | |
1399 | * If connection is not running, try to restart it | |
e82b0f2c | 1400 | * and throw away packet. |
1da177e4 LT |
1401 | */ |
1402 | if (fsm_getstate(privptr->fsm) != DEV_STATE_RUNNING) { | |
1da177e4 LT |
1403 | dev_kfree_skb(skb); |
1404 | privptr->stats.tx_dropped++; | |
1405 | privptr->stats.tx_errors++; | |
1406 | privptr->stats.tx_carrier_errors++; | |
ec634fe3 | 1407 | return NETDEV_TX_OK; |
1da177e4 LT |
1408 | } |
1409 | ||
1410 | if (netiucv_test_and_set_busy(dev)) { | |
1411 | IUCV_DBF_TEXT(data, 2, "EBUSY from netiucv_tx\n"); | |
4e584d66 | 1412 | return NETDEV_TX_BUSY; |
1da177e4 LT |
1413 | } |
1414 | dev->trans_start = jiffies; | |
5b548140 | 1415 | rc = netiucv_transmit_skb(privptr->conn, skb); |
1da177e4 | 1416 | netiucv_clear_busy(dev); |
5b548140 | 1417 | return rc ? NETDEV_TX_BUSY : NETDEV_TX_OK; |
1da177e4 LT |
1418 | } |
1419 | ||
1420 | /** | |
eebce385 MS |
1421 | * netiucv_stats |
1422 | * @dev: Pointer to interface struct. | |
1da177e4 | 1423 | * |
eebce385 | 1424 | * Returns interface statistics of a device. |
1da177e4 | 1425 | * |
eebce385 | 1426 | * Returns pointer to stats struct of this interface. |
1da177e4 | 1427 | */ |
eebce385 | 1428 | static struct net_device_stats *netiucv_stats (struct net_device * dev) |
1da177e4 | 1429 | { |
eebce385 MS |
1430 | struct netiucv_priv *priv = netdev_priv(dev); |
1431 | ||
2a2cf6b1 | 1432 | IUCV_DBF_TEXT(trace, 5, __func__); |
eebce385 | 1433 | return &priv->stats; |
1da177e4 LT |
1434 | } |
1435 | ||
1436 | /** | |
eebce385 MS |
1437 | * netiucv_change_mtu |
1438 | * @dev: Pointer to interface struct. | |
1439 | * @new_mtu: The new MTU to use for this interface. | |
1da177e4 | 1440 | * |
eebce385 | 1441 | * Sets MTU of an interface. |
1da177e4 | 1442 | * |
eebce385 | 1443 | * Returns 0 on success, -EINVAL if MTU is out of valid range. |
1da177e4 LT |
1444 | * (valid range is 576 .. NETIUCV_MTU_MAX). |
1445 | */ | |
eebce385 | 1446 | static int netiucv_change_mtu(struct net_device * dev, int new_mtu) |
1da177e4 | 1447 | { |
2a2cf6b1 | 1448 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 | 1449 | if (new_mtu < 576 || new_mtu > NETIUCV_MTU_MAX) { |
1da177e4 LT |
1450 | IUCV_DBF_TEXT(setup, 2, "given MTU out of valid range\n"); |
1451 | return -EINVAL; | |
1452 | } | |
1453 | dev->mtu = new_mtu; | |
1454 | return 0; | |
1455 | } | |
1456 | ||
eebce385 | 1457 | /* |
1da177e4 | 1458 | * attributes in sysfs |
eebce385 | 1459 | */ |
1da177e4 | 1460 | |
eebce385 MS |
1461 | static ssize_t user_show(struct device *dev, struct device_attribute *attr, |
1462 | char *buf) | |
1da177e4 | 1463 | { |
dff59b64 | 1464 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1465 | |
2a2cf6b1 | 1466 | IUCV_DBF_TEXT(trace, 5, __func__); |
08e3356c | 1467 | return sprintf(buf, "%s\n", netiucv_printuser(priv->conn)); |
1da177e4 LT |
1468 | } |
1469 | ||
08e3356c UB |
1470 | static int netiucv_check_user(const char *buf, size_t count, char *username, |
1471 | char *userdata) | |
1da177e4 | 1472 | { |
08e3356c UB |
1473 | const char *p; |
1474 | int i; | |
1da177e4 | 1475 | |
08e3356c UB |
1476 | p = strchr(buf, '.'); |
1477 | if ((p && ((count > 26) || | |
1478 | ((p - buf) > 8) || | |
1479 | (buf + count - p > 18))) || | |
1480 | (!p && (count > 9))) { | |
1481 | IUCV_DBF_TEXT(setup, 2, "conn_write: too long\n"); | |
1da177e4 LT |
1482 | return -EINVAL; |
1483 | } | |
1484 | ||
08e3356c UB |
1485 | for (i = 0, p = buf; i < 8 && *p && *p != '.'; i++, p++) { |
1486 | if (isalnum(*p) || *p == '$') { | |
1487 | username[i] = toupper(*p); | |
eebce385 MS |
1488 | continue; |
1489 | } | |
08e3356c | 1490 | if (*p == '\n') |
1da177e4 LT |
1491 | /* trailing lf, grr */ |
1492 | break; | |
eebce385 | 1493 | IUCV_DBF_TEXT_(setup, 2, |
08e3356c | 1494 | "conn_write: invalid character %02x\n", *p); |
eebce385 | 1495 | return -EINVAL; |
1da177e4 | 1496 | } |
eebce385 | 1497 | while (i < 8) |
1da177e4 | 1498 | username[i++] = ' '; |
16a83b30 | 1499 | username[8] = '\0'; |
1da177e4 | 1500 | |
08e3356c UB |
1501 | if (*p == '.') { |
1502 | p++; | |
1503 | for (i = 0; i < 16 && *p; i++, p++) { | |
1504 | if (*p == '\n') | |
1505 | break; | |
1506 | userdata[i] = toupper(*p); | |
1507 | } | |
1508 | while (i > 0 && i < 16) | |
1509 | userdata[i++] = ' '; | |
1510 | } else | |
1511 | memcpy(userdata, iucvMagic_ascii, 16); | |
1512 | userdata[16] = '\0'; | |
1513 | ASCEBC(userdata, 16); | |
1514 | ||
1515 | return 0; | |
1516 | } | |
1517 | ||
1518 | static ssize_t user_write(struct device *dev, struct device_attribute *attr, | |
1519 | const char *buf, size_t count) | |
1520 | { | |
1521 | struct netiucv_priv *priv = dev_get_drvdata(dev); | |
1522 | struct net_device *ndev = priv->conn->netdev; | |
1523 | char username[9]; | |
1524 | char userdata[17]; | |
1525 | int rc; | |
1526 | struct iucv_connection *cp; | |
1527 | ||
1528 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1529 | rc = netiucv_check_user(buf, count, username, userdata); | |
1530 | if (rc) | |
1531 | return rc; | |
1532 | ||
eebce385 MS |
1533 | if (memcmp(username, priv->conn->userid, 9) && |
1534 | (ndev->flags & (IFF_UP | IFF_RUNNING))) { | |
1535 | /* username changed while the interface is active. */ | |
eebce385 | 1536 | IUCV_DBF_TEXT(setup, 2, "user_write: device active\n"); |
f082bcae | 1537 | return -EPERM; |
eebce385 MS |
1538 | } |
1539 | read_lock_bh(&iucv_connection_rwlock); | |
1540 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
08e3356c UB |
1541 | if (!strncmp(username, cp->userid, 9) && |
1542 | !strncmp(userdata, cp->userdata, 17) && cp->netdev != ndev) { | |
eebce385 | 1543 | read_unlock_bh(&iucv_connection_rwlock); |
08e3356c UB |
1544 | IUCV_DBF_TEXT_(setup, 2, "user_write: Connection to %s " |
1545 | "already exists\n", netiucv_printuser(cp)); | |
eebce385 | 1546 | return -EEXIST; |
1da177e4 LT |
1547 | } |
1548 | } | |
eebce385 | 1549 | read_unlock_bh(&iucv_connection_rwlock); |
1da177e4 | 1550 | memcpy(priv->conn->userid, username, 9); |
08e3356c | 1551 | memcpy(priv->conn->userdata, userdata, 17); |
1da177e4 | 1552 | return count; |
1da177e4 LT |
1553 | } |
1554 | ||
1555 | static DEVICE_ATTR(user, 0644, user_show, user_write); | |
1556 | ||
eebce385 MS |
1557 | static ssize_t buffer_show (struct device *dev, struct device_attribute *attr, |
1558 | char *buf) | |
dff59b64 GKH |
1559 | { |
1560 | struct netiucv_priv *priv = dev_get_drvdata(dev); | |
1da177e4 | 1561 | |
2a2cf6b1 | 1562 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1563 | return sprintf(buf, "%d\n", priv->conn->max_buffsize); |
1564 | } | |
1565 | ||
eebce385 MS |
1566 | static ssize_t buffer_write (struct device *dev, struct device_attribute *attr, |
1567 | const char *buf, size_t count) | |
1da177e4 | 1568 | { |
dff59b64 | 1569 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 LT |
1570 | struct net_device *ndev = priv->conn->netdev; |
1571 | char *e; | |
1572 | int bs1; | |
1573 | ||
2a2cf6b1 | 1574 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1575 | if (count >= 39) |
1576 | return -EINVAL; | |
1577 | ||
1578 | bs1 = simple_strtoul(buf, &e, 0); | |
1579 | ||
1580 | if (e && (!isspace(*e))) { | |
08e3356c UB |
1581 | IUCV_DBF_TEXT_(setup, 2, "buffer_write: invalid char %02x\n", |
1582 | *e); | |
1da177e4 LT |
1583 | return -EINVAL; |
1584 | } | |
1585 | if (bs1 > NETIUCV_BUFSIZE_MAX) { | |
1da177e4 LT |
1586 | IUCV_DBF_TEXT_(setup, 2, |
1587 | "buffer_write: buffer size %d too large\n", | |
1588 | bs1); | |
1589 | return -EINVAL; | |
1590 | } | |
1591 | if ((ndev->flags & IFF_RUNNING) && | |
1592 | (bs1 < (ndev->mtu + NETIUCV_HDRLEN + 2))) { | |
1da177e4 LT |
1593 | IUCV_DBF_TEXT_(setup, 2, |
1594 | "buffer_write: buffer size %d too small\n", | |
1595 | bs1); | |
1596 | return -EINVAL; | |
1597 | } | |
1598 | if (bs1 < (576 + NETIUCV_HDRLEN + NETIUCV_HDRLEN)) { | |
1da177e4 LT |
1599 | IUCV_DBF_TEXT_(setup, 2, |
1600 | "buffer_write: buffer size %d too small\n", | |
1601 | bs1); | |
1602 | return -EINVAL; | |
1603 | } | |
1604 | ||
1605 | priv->conn->max_buffsize = bs1; | |
1606 | if (!(ndev->flags & IFF_RUNNING)) | |
1607 | ndev->mtu = bs1 - NETIUCV_HDRLEN - NETIUCV_HDRLEN; | |
1608 | ||
1609 | return count; | |
1610 | ||
1611 | } | |
1612 | ||
1613 | static DEVICE_ATTR(buffer, 0644, buffer_show, buffer_write); | |
1614 | ||
eebce385 MS |
1615 | static ssize_t dev_fsm_show (struct device *dev, struct device_attribute *attr, |
1616 | char *buf) | |
1da177e4 | 1617 | { |
dff59b64 | 1618 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1619 | |
2a2cf6b1 | 1620 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1621 | return sprintf(buf, "%s\n", fsm_getstate_str(priv->fsm)); |
1622 | } | |
1623 | ||
1624 | static DEVICE_ATTR(device_fsm_state, 0444, dev_fsm_show, NULL); | |
1625 | ||
eebce385 MS |
1626 | static ssize_t conn_fsm_show (struct device *dev, |
1627 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1628 | { |
dff59b64 | 1629 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1630 | |
2a2cf6b1 | 1631 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1632 | return sprintf(buf, "%s\n", fsm_getstate_str(priv->conn->fsm)); |
1633 | } | |
1634 | ||
1635 | static DEVICE_ATTR(connection_fsm_state, 0444, conn_fsm_show, NULL); | |
1636 | ||
eebce385 MS |
1637 | static ssize_t maxmulti_show (struct device *dev, |
1638 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1639 | { |
dff59b64 | 1640 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1641 | |
2a2cf6b1 | 1642 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1643 | return sprintf(buf, "%ld\n", priv->conn->prof.maxmulti); |
1644 | } | |
1645 | ||
eebce385 MS |
1646 | static ssize_t maxmulti_write (struct device *dev, |
1647 | struct device_attribute *attr, | |
1648 | const char *buf, size_t count) | |
1da177e4 | 1649 | { |
dff59b64 | 1650 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1651 | |
2a2cf6b1 | 1652 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1653 | priv->conn->prof.maxmulti = 0; |
1654 | return count; | |
1655 | } | |
1656 | ||
1657 | static DEVICE_ATTR(max_tx_buffer_used, 0644, maxmulti_show, maxmulti_write); | |
1658 | ||
eebce385 MS |
1659 | static ssize_t maxcq_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.maxcqueue); |
1666 | } | |
1667 | ||
eebce385 MS |
1668 | static ssize_t maxcq_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, 4, __func__); |
1da177e4 LT |
1674 | priv->conn->prof.maxcqueue = 0; |
1675 | return count; | |
1676 | } | |
1677 | ||
1678 | static DEVICE_ATTR(max_chained_skbs, 0644, maxcq_show, maxcq_write); | |
1679 | ||
eebce385 MS |
1680 | static ssize_t sdoio_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.doios_single); |
1687 | } | |
1688 | ||
eebce385 MS |
1689 | static ssize_t sdoio_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.doios_single = 0; |
1696 | return count; | |
1697 | } | |
1698 | ||
1699 | static DEVICE_ATTR(tx_single_write_ops, 0644, sdoio_show, sdoio_write); | |
1700 | ||
eebce385 MS |
1701 | static ssize_t mdoio_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.doios_multi); |
1708 | } | |
1709 | ||
eebce385 MS |
1710 | static ssize_t mdoio_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, 5, __func__); |
1da177e4 LT |
1716 | priv->conn->prof.doios_multi = 0; |
1717 | return count; | |
1718 | } | |
1719 | ||
1720 | static DEVICE_ATTR(tx_multi_write_ops, 0644, mdoio_show, mdoio_write); | |
1721 | ||
eebce385 MS |
1722 | static ssize_t txlen_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.txlen); |
1729 | } | |
1730 | ||
eebce385 MS |
1731 | static ssize_t txlen_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); |
e82b0f2c | 1735 | |
2a2cf6b1 | 1736 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1737 | priv->conn->prof.txlen = 0; |
1738 | return count; | |
1739 | } | |
1740 | ||
1741 | static DEVICE_ATTR(netto_bytes, 0644, txlen_show, txlen_write); | |
1742 | ||
eebce385 MS |
1743 | static ssize_t txtime_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_time); |
1750 | } | |
1751 | ||
eebce385 MS |
1752 | static ssize_t txtime_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); |
e82b0f2c | 1756 | |
2a2cf6b1 | 1757 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1758 | priv->conn->prof.tx_time = 0; |
1759 | return count; | |
1760 | } | |
1761 | ||
1762 | static DEVICE_ATTR(max_tx_io_time, 0644, txtime_show, txtime_write); | |
1763 | ||
eebce385 MS |
1764 | static ssize_t txpend_show (struct device *dev, struct device_attribute *attr, |
1765 | char *buf) | |
1da177e4 | 1766 | { |
dff59b64 | 1767 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1768 | |
2a2cf6b1 | 1769 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1770 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_pending); |
1771 | } | |
1772 | ||
eebce385 MS |
1773 | static ssize_t txpend_write (struct device *dev, struct device_attribute *attr, |
1774 | const char *buf, size_t count) | |
1da177e4 | 1775 | { |
dff59b64 | 1776 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1777 | |
2a2cf6b1 | 1778 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1779 | priv->conn->prof.tx_pending = 0; |
1780 | return count; | |
1781 | } | |
1782 | ||
1783 | static DEVICE_ATTR(tx_pending, 0644, txpend_show, txpend_write); | |
1784 | ||
eebce385 MS |
1785 | static ssize_t txmpnd_show (struct device *dev, struct device_attribute *attr, |
1786 | char *buf) | |
1da177e4 | 1787 | { |
dff59b64 | 1788 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1789 | |
2a2cf6b1 | 1790 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1791 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_max_pending); |
1792 | } | |
1793 | ||
eebce385 MS |
1794 | static ssize_t txmpnd_write (struct device *dev, struct device_attribute *attr, |
1795 | const char *buf, size_t count) | |
1da177e4 | 1796 | { |
dff59b64 | 1797 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1798 | |
2a2cf6b1 | 1799 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1800 | priv->conn->prof.tx_max_pending = 0; |
1801 | return count; | |
1802 | } | |
1803 | ||
1804 | static DEVICE_ATTR(tx_max_pending, 0644, txmpnd_show, txmpnd_write); | |
1805 | ||
1806 | static struct attribute *netiucv_attrs[] = { | |
1807 | &dev_attr_buffer.attr, | |
1808 | &dev_attr_user.attr, | |
1809 | NULL, | |
1810 | }; | |
1811 | ||
1812 | static struct attribute_group netiucv_attr_group = { | |
1813 | .attrs = netiucv_attrs, | |
1814 | }; | |
1815 | ||
1816 | static struct attribute *netiucv_stat_attrs[] = { | |
1817 | &dev_attr_device_fsm_state.attr, | |
1818 | &dev_attr_connection_fsm_state.attr, | |
1819 | &dev_attr_max_tx_buffer_used.attr, | |
1820 | &dev_attr_max_chained_skbs.attr, | |
1821 | &dev_attr_tx_single_write_ops.attr, | |
1822 | &dev_attr_tx_multi_write_ops.attr, | |
1823 | &dev_attr_netto_bytes.attr, | |
1824 | &dev_attr_max_tx_io_time.attr, | |
1825 | &dev_attr_tx_pending.attr, | |
1826 | &dev_attr_tx_max_pending.attr, | |
1827 | NULL, | |
1828 | }; | |
1829 | ||
1830 | static struct attribute_group netiucv_stat_attr_group = { | |
1831 | .name = "stats", | |
1832 | .attrs = netiucv_stat_attrs, | |
1833 | }; | |
1834 | ||
0b945293 | 1835 | static const struct attribute_group *netiucv_attr_groups[] = { |
1836 | &netiucv_stat_attr_group, | |
1837 | &netiucv_attr_group, | |
1838 | NULL, | |
1839 | }; | |
1da177e4 | 1840 | |
eebce385 | 1841 | static int netiucv_register_device(struct net_device *ndev) |
1da177e4 | 1842 | { |
eebce385 | 1843 | struct netiucv_priv *priv = netdev_priv(ndev); |
88abaab4 | 1844 | struct device *dev = kzalloc(sizeof(struct device), GFP_KERNEL); |
1da177e4 LT |
1845 | int ret; |
1846 | ||
2a2cf6b1 | 1847 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1848 | |
1849 | if (dev) { | |
1bf5b285 | 1850 | dev_set_name(dev, "net%s", ndev->name); |
1da177e4 LT |
1851 | dev->bus = &iucv_bus; |
1852 | dev->parent = iucv_root; | |
0b945293 | 1853 | dev->groups = netiucv_attr_groups; |
1da177e4 LT |
1854 | /* |
1855 | * The release function could be called after the | |
1856 | * module has been unloaded. It's _only_ task is to | |
1857 | * free the struct. Therefore, we specify kfree() | |
1858 | * directly here. (Probably a little bit obfuscating | |
1859 | * but legitime ...). | |
1860 | */ | |
1861 | dev->release = (void (*)(struct device *))kfree; | |
1862 | dev->driver = &netiucv_driver; | |
1863 | } else | |
1864 | return -ENOMEM; | |
1865 | ||
1866 | ret = device_register(dev); | |
c6304933 SO |
1867 | if (ret) { |
1868 | put_device(dev); | |
1da177e4 | 1869 | return ret; |
c6304933 | 1870 | } |
1da177e4 | 1871 | priv->dev = dev; |
dff59b64 | 1872 | dev_set_drvdata(dev, priv); |
1da177e4 | 1873 | return 0; |
1da177e4 LT |
1874 | } |
1875 | ||
eebce385 | 1876 | static void netiucv_unregister_device(struct device *dev) |
1da177e4 | 1877 | { |
2a2cf6b1 | 1878 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1879 | device_unregister(dev); |
1880 | } | |
1881 | ||
1882 | /** | |
1883 | * Allocate and initialize a new connection structure. | |
1884 | * Add it to the list of netiucv connections; | |
1885 | */ | |
eebce385 | 1886 | static struct iucv_connection *netiucv_new_connection(struct net_device *dev, |
08e3356c UB |
1887 | char *username, |
1888 | char *userdata) | |
eebce385 MS |
1889 | { |
1890 | struct iucv_connection *conn; | |
1da177e4 | 1891 | |
eebce385 MS |
1892 | conn = kzalloc(sizeof(*conn), GFP_KERNEL); |
1893 | if (!conn) | |
1894 | goto out; | |
1895 | skb_queue_head_init(&conn->collect_queue); | |
1896 | skb_queue_head_init(&conn->commit_queue); | |
1897 | spin_lock_init(&conn->collect_lock); | |
1898 | conn->max_buffsize = NETIUCV_BUFSIZE_DEFAULT; | |
1899 | conn->netdev = dev; | |
1900 | ||
1901 | conn->rx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA); | |
1902 | if (!conn->rx_buff) | |
1903 | goto out_conn; | |
1904 | conn->tx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA); | |
1905 | if (!conn->tx_buff) | |
1906 | goto out_rx; | |
1907 | conn->fsm = init_fsm("netiucvconn", conn_state_names, | |
1908 | conn_event_names, NR_CONN_STATES, | |
1909 | NR_CONN_EVENTS, conn_fsm, CONN_FSM_LEN, | |
1910 | GFP_KERNEL); | |
1911 | if (!conn->fsm) | |
1912 | goto out_tx; | |
1913 | ||
1914 | fsm_settimer(conn->fsm, &conn->timer); | |
1915 | fsm_newstate(conn->fsm, CONN_STATE_INVALID); | |
1916 | ||
08e3356c UB |
1917 | if (userdata) |
1918 | memcpy(conn->userdata, userdata, 17); | |
eebce385 MS |
1919 | if (username) { |
1920 | memcpy(conn->userid, username, 9); | |
1921 | fsm_newstate(conn->fsm, CONN_STATE_STOPPED); | |
1da177e4 | 1922 | } |
eebce385 MS |
1923 | |
1924 | write_lock_bh(&iucv_connection_rwlock); | |
1925 | list_add_tail(&conn->list, &iucv_connection_list); | |
1926 | write_unlock_bh(&iucv_connection_rwlock); | |
1da177e4 | 1927 | return conn; |
eebce385 MS |
1928 | |
1929 | out_tx: | |
1930 | kfree_skb(conn->tx_buff); | |
1931 | out_rx: | |
1932 | kfree_skb(conn->rx_buff); | |
1933 | out_conn: | |
1934 | kfree(conn); | |
1935 | out: | |
1936 | return NULL; | |
1da177e4 LT |
1937 | } |
1938 | ||
1939 | /** | |
1940 | * Release a connection structure and remove it from the | |
1941 | * list of netiucv connections. | |
1942 | */ | |
eebce385 | 1943 | static void netiucv_remove_connection(struct iucv_connection *conn) |
1da177e4 | 1944 | { |
08e3356c | 1945 | |
2a2cf6b1 | 1946 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 MS |
1947 | write_lock_bh(&iucv_connection_rwlock); |
1948 | list_del_init(&conn->list); | |
1949 | write_unlock_bh(&iucv_connection_rwlock); | |
0be4acec UB |
1950 | fsm_deltimer(&conn->timer); |
1951 | netiucv_purge_skb_queue(&conn->collect_queue); | |
eebce385 | 1952 | if (conn->path) { |
08e3356c | 1953 | iucv_path_sever(conn->path, conn->userdata); |
eebce385 MS |
1954 | kfree(conn->path); |
1955 | conn->path = NULL; | |
1da177e4 | 1956 | } |
0be4acec | 1957 | netiucv_purge_skb_queue(&conn->commit_queue); |
eebce385 MS |
1958 | kfree_fsm(conn->fsm); |
1959 | kfree_skb(conn->rx_buff); | |
1960 | kfree_skb(conn->tx_buff); | |
1da177e4 LT |
1961 | } |
1962 | ||
1963 | /** | |
1964 | * Release everything of a net device. | |
1965 | */ | |
eebce385 | 1966 | static void netiucv_free_netdevice(struct net_device *dev) |
1da177e4 | 1967 | { |
eebce385 | 1968 | struct netiucv_priv *privptr = netdev_priv(dev); |
1da177e4 | 1969 | |
2a2cf6b1 | 1970 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1971 | |
1972 | if (!dev) | |
1973 | return; | |
1974 | ||
1da177e4 LT |
1975 | if (privptr) { |
1976 | if (privptr->conn) | |
1977 | netiucv_remove_connection(privptr->conn); | |
1978 | if (privptr->fsm) | |
1979 | kfree_fsm(privptr->fsm); | |
1980 | privptr->conn = NULL; privptr->fsm = NULL; | |
1981 | /* privptr gets freed by free_netdev() */ | |
1982 | } | |
1983 | free_netdev(dev); | |
1984 | } | |
1985 | ||
1986 | /** | |
1987 | * Initialize a net device. (Called from kernel in alloc_netdev()) | |
1988 | */ | |
4edd73b5 FB |
1989 | static const struct net_device_ops netiucv_netdev_ops = { |
1990 | .ndo_open = netiucv_open, | |
1991 | .ndo_stop = netiucv_close, | |
1992 | .ndo_get_stats = netiucv_stats, | |
1993 | .ndo_start_xmit = netiucv_tx, | |
1994 | .ndo_change_mtu = netiucv_change_mtu, | |
1995 | }; | |
1996 | ||
eebce385 | 1997 | static void netiucv_setup_netdevice(struct net_device *dev) |
1da177e4 | 1998 | { |
1da177e4 | 1999 | dev->mtu = NETIUCV_MTU_DEFAULT; |
1da177e4 LT |
2000 | dev->destructor = netiucv_free_netdevice; |
2001 | dev->hard_header_len = NETIUCV_HDRLEN; | |
2002 | dev->addr_len = 0; | |
2003 | dev->type = ARPHRD_SLIP; | |
2004 | dev->tx_queue_len = NETIUCV_QUEUELEN_DEFAULT; | |
2005 | dev->flags = IFF_POINTOPOINT | IFF_NOARP; | |
4edd73b5 | 2006 | dev->netdev_ops = &netiucv_netdev_ops; |
1da177e4 LT |
2007 | } |
2008 | ||
2009 | /** | |
2010 | * Allocate and initialize everything of a net device. | |
2011 | */ | |
08e3356c | 2012 | static struct net_device *netiucv_init_netdevice(char *username, char *userdata) |
1da177e4 LT |
2013 | { |
2014 | struct netiucv_priv *privptr; | |
2015 | struct net_device *dev; | |
2016 | ||
2017 | dev = alloc_netdev(sizeof(struct netiucv_priv), "iucv%d", | |
c835a677 | 2018 | NET_NAME_UNKNOWN, netiucv_setup_netdevice); |
1da177e4 LT |
2019 | if (!dev) |
2020 | return NULL; | |
aaf9522d | 2021 | rtnl_lock(); |
1d503563 UB |
2022 | if (dev_alloc_name(dev, dev->name) < 0) |
2023 | goto out_netdev; | |
1da177e4 | 2024 | |
eebce385 | 2025 | privptr = netdev_priv(dev); |
1da177e4 LT |
2026 | privptr->fsm = init_fsm("netiucvdev", dev_state_names, |
2027 | dev_event_names, NR_DEV_STATES, NR_DEV_EVENTS, | |
2028 | dev_fsm, DEV_FSM_LEN, GFP_KERNEL); | |
eebce385 MS |
2029 | if (!privptr->fsm) |
2030 | goto out_netdev; | |
2031 | ||
08e3356c | 2032 | privptr->conn = netiucv_new_connection(dev, username, userdata); |
1da177e4 | 2033 | if (!privptr->conn) { |
1da177e4 | 2034 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_new_connection\n"); |
eebce385 | 2035 | goto out_fsm; |
1da177e4 LT |
2036 | } |
2037 | fsm_newstate(privptr->fsm, DEV_STATE_STOPPED); | |
1da177e4 | 2038 | return dev; |
eebce385 MS |
2039 | |
2040 | out_fsm: | |
2041 | kfree_fsm(privptr->fsm); | |
2042 | out_netdev: | |
aaf9522d | 2043 | rtnl_unlock(); |
eebce385 MS |
2044 | free_netdev(dev); |
2045 | return NULL; | |
1da177e4 LT |
2046 | } |
2047 | ||
eebce385 MS |
2048 | static ssize_t conn_write(struct device_driver *drv, |
2049 | const char *buf, size_t count) | |
1da177e4 | 2050 | { |
16a83b30 | 2051 | char username[9]; |
08e3356c UB |
2052 | char userdata[17]; |
2053 | int rc; | |
1da177e4 | 2054 | struct net_device *dev; |
eebce385 MS |
2055 | struct netiucv_priv *priv; |
2056 | struct iucv_connection *cp; | |
1da177e4 | 2057 | |
2a2cf6b1 | 2058 | IUCV_DBF_TEXT(trace, 3, __func__); |
08e3356c UB |
2059 | rc = netiucv_check_user(buf, count, username, userdata); |
2060 | if (rc) | |
2061 | return rc; | |
16a83b30 | 2062 | |
eebce385 MS |
2063 | read_lock_bh(&iucv_connection_rwlock); |
2064 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
08e3356c UB |
2065 | if (!strncmp(username, cp->userid, 9) && |
2066 | !strncmp(userdata, cp->userdata, 17)) { | |
eebce385 | 2067 | read_unlock_bh(&iucv_connection_rwlock); |
08e3356c UB |
2068 | IUCV_DBF_TEXT_(setup, 2, "conn_write: Connection to %s " |
2069 | "already exists\n", netiucv_printuser(cp)); | |
eebce385 MS |
2070 | return -EEXIST; |
2071 | } | |
16a83b30 | 2072 | } |
eebce385 MS |
2073 | read_unlock_bh(&iucv_connection_rwlock); |
2074 | ||
08e3356c | 2075 | dev = netiucv_init_netdevice(username, userdata); |
1da177e4 | 2076 | if (!dev) { |
1da177e4 LT |
2077 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_init_netdevice\n"); |
2078 | return -ENODEV; | |
2079 | } | |
2080 | ||
eebce385 MS |
2081 | rc = netiucv_register_device(dev); |
2082 | if (rc) { | |
aaf9522d | 2083 | rtnl_unlock(); |
1da177e4 | 2084 | IUCV_DBF_TEXT_(setup, 2, |
eebce385 | 2085 | "ret %d from netiucv_register_device\n", rc); |
1da177e4 LT |
2086 | goto out_free_ndev; |
2087 | } | |
2088 | ||
2089 | /* sysfs magic */ | |
eebce385 MS |
2090 | priv = netdev_priv(dev); |
2091 | SET_NETDEV_DEV(dev, priv->dev); | |
1da177e4 | 2092 | |
aaf9522d BP |
2093 | rc = register_netdevice(dev); |
2094 | rtnl_unlock(); | |
eebce385 MS |
2095 | if (rc) |
2096 | goto out_unreg; | |
1da177e4 | 2097 | |
08e3356c UB |
2098 | dev_info(priv->dev, "The IUCV interface to %s has been established " |
2099 | "successfully\n", | |
2100 | netiucv_printuser(priv->conn)); | |
e82b0f2c | 2101 | |
1da177e4 LT |
2102 | return count; |
2103 | ||
eebce385 MS |
2104 | out_unreg: |
2105 | netiucv_unregister_device(priv->dev); | |
1da177e4 | 2106 | out_free_ndev: |
1da177e4 | 2107 | netiucv_free_netdevice(dev); |
eebce385 | 2108 | return rc; |
1da177e4 LT |
2109 | } |
2110 | ||
2b67fc46 | 2111 | static DRIVER_ATTR(connection, 0200, NULL, conn_write); |
1da177e4 | 2112 | |
eebce385 MS |
2113 | static ssize_t remove_write (struct device_driver *drv, |
2114 | const char *buf, size_t count) | |
1da177e4 | 2115 | { |
eebce385 | 2116 | struct iucv_connection *cp; |
1da177e4 LT |
2117 | struct net_device *ndev; |
2118 | struct netiucv_priv *priv; | |
2119 | struct device *dev; | |
2120 | char name[IFNAMSIZ]; | |
eebce385 | 2121 | const char *p; |
1da177e4 LT |
2122 | int i; |
2123 | ||
2a2cf6b1 | 2124 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
2125 | |
2126 | if (count >= IFNAMSIZ) | |
a419aef8 | 2127 | count = IFNAMSIZ - 1; |
1da177e4 | 2128 | |
eebce385 MS |
2129 | for (i = 0, p = buf; i < count && *p; i++, p++) { |
2130 | if (*p == '\n' || *p == ' ') | |
1da177e4 LT |
2131 | /* trailing lf, grr */ |
2132 | break; | |
eebce385 | 2133 | name[i] = *p; |
1da177e4 LT |
2134 | } |
2135 | name[i] = '\0'; | |
2136 | ||
eebce385 MS |
2137 | read_lock_bh(&iucv_connection_rwlock); |
2138 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
2139 | ndev = cp->netdev; | |
2140 | priv = netdev_priv(ndev); | |
1da177e4 | 2141 | dev = priv->dev; |
eebce385 MS |
2142 | if (strncmp(name, ndev->name, count)) |
2143 | continue; | |
2144 | read_unlock_bh(&iucv_connection_rwlock); | |
1da177e4 | 2145 | if (ndev->flags & (IFF_UP | IFF_RUNNING)) { |
8f7c502c UB |
2146 | dev_warn(dev, "The IUCV device is connected" |
2147 | " to %s and cannot be removed\n", | |
2148 | priv->conn->userid); | |
1da177e4 | 2149 | IUCV_DBF_TEXT(data, 2, "remove_write: still active\n"); |
f082bcae | 2150 | return -EPERM; |
1da177e4 LT |
2151 | } |
2152 | unregister_netdev(ndev); | |
2153 | netiucv_unregister_device(dev); | |
2154 | return count; | |
2155 | } | |
eebce385 | 2156 | read_unlock_bh(&iucv_connection_rwlock); |
1da177e4 LT |
2157 | IUCV_DBF_TEXT(data, 2, "remove_write: unknown device\n"); |
2158 | return -EINVAL; | |
2159 | } | |
2160 | ||
2b67fc46 | 2161 | static DRIVER_ATTR(remove, 0200, NULL, remove_write); |
1da177e4 | 2162 | |
eebce385 MS |
2163 | static struct attribute * netiucv_drv_attrs[] = { |
2164 | &driver_attr_connection.attr, | |
2165 | &driver_attr_remove.attr, | |
2166 | NULL, | |
2167 | }; | |
2168 | ||
2169 | static struct attribute_group netiucv_drv_attr_group = { | |
2170 | .attrs = netiucv_drv_attrs, | |
2171 | }; | |
2172 | ||
a4dbd674 | 2173 | static const struct attribute_group *netiucv_drv_attr_groups[] = { |
5b88feb1 CH |
2174 | &netiucv_drv_attr_group, |
2175 | NULL, | |
2176 | }; | |
2177 | ||
eebce385 | 2178 | static void netiucv_banner(void) |
1da177e4 | 2179 | { |
8f7c502c | 2180 | pr_info("driver initialized\n"); |
1da177e4 LT |
2181 | } |
2182 | ||
eebce385 | 2183 | static void __exit netiucv_exit(void) |
1da177e4 | 2184 | { |
eebce385 MS |
2185 | struct iucv_connection *cp; |
2186 | struct net_device *ndev; | |
2187 | struct netiucv_priv *priv; | |
2188 | struct device *dev; | |
2189 | ||
2a2cf6b1 | 2190 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 MS |
2191 | while (!list_empty(&iucv_connection_list)) { |
2192 | cp = list_entry(iucv_connection_list.next, | |
2193 | struct iucv_connection, list); | |
eebce385 MS |
2194 | ndev = cp->netdev; |
2195 | priv = netdev_priv(ndev); | |
2196 | dev = priv->dev; | |
1da177e4 LT |
2197 | |
2198 | unregister_netdev(ndev); | |
2199 | netiucv_unregister_device(dev); | |
2200 | } | |
2201 | ||
1175b257 | 2202 | device_unregister(netiucv_dev); |
1da177e4 | 2203 | driver_unregister(&netiucv_driver); |
eebce385 | 2204 | iucv_unregister(&netiucv_handler, 1); |
1da177e4 LT |
2205 | iucv_unregister_dbf_views(); |
2206 | ||
8f7c502c | 2207 | pr_info("driver unloaded\n"); |
1da177e4 LT |
2208 | return; |
2209 | } | |
2210 | ||
eebce385 | 2211 | static int __init netiucv_init(void) |
1da177e4 | 2212 | { |
eebce385 | 2213 | int rc; |
e82b0f2c | 2214 | |
eebce385 MS |
2215 | rc = iucv_register_dbf_views(); |
2216 | if (rc) | |
2217 | goto out; | |
2218 | rc = iucv_register(&netiucv_handler, 1); | |
2219 | if (rc) | |
2220 | goto out_dbf; | |
2a2cf6b1 | 2221 | IUCV_DBF_TEXT(trace, 3, __func__); |
0a0a8310 | 2222 | netiucv_driver.groups = netiucv_drv_attr_groups; |
eebce385 MS |
2223 | rc = driver_register(&netiucv_driver); |
2224 | if (rc) { | |
eebce385 MS |
2225 | IUCV_DBF_TEXT_(setup, 2, "ret %d from driver_register\n", rc); |
2226 | goto out_iucv; | |
1da177e4 | 2227 | } |
1175b257 UB |
2228 | /* establish dummy device */ |
2229 | netiucv_dev = kzalloc(sizeof(struct device), GFP_KERNEL); | |
2230 | if (!netiucv_dev) { | |
2231 | rc = -ENOMEM; | |
2232 | goto out_driver; | |
2233 | } | |
2234 | dev_set_name(netiucv_dev, "netiucv"); | |
2235 | netiucv_dev->bus = &iucv_bus; | |
2236 | netiucv_dev->parent = iucv_root; | |
2237 | netiucv_dev->release = (void (*)(struct device *))kfree; | |
2238 | netiucv_dev->driver = &netiucv_driver; | |
2239 | rc = device_register(netiucv_dev); | |
c6304933 SO |
2240 | if (rc) { |
2241 | put_device(netiucv_dev); | |
1175b257 | 2242 | goto out_driver; |
c6304933 | 2243 | } |
eebce385 MS |
2244 | netiucv_banner(); |
2245 | return rc; | |
2246 | ||
1175b257 UB |
2247 | out_driver: |
2248 | driver_unregister(&netiucv_driver); | |
eebce385 MS |
2249 | out_iucv: |
2250 | iucv_unregister(&netiucv_handler, 1); | |
2251 | out_dbf: | |
2252 | iucv_unregister_dbf_views(); | |
2253 | out: | |
2254 | return rc; | |
1da177e4 | 2255 | } |
e82b0f2c | 2256 | |
1da177e4 LT |
2257 | module_init(netiucv_init); |
2258 | module_exit(netiucv_exit); | |
2259 | MODULE_LICENSE("GPL"); |