Commit | Line | Data |
---|---|---|
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 | /* Allow to sort out low debug levels early to avoid wasted sprints */ |
109 | static inline int iucv_dbf_passes(debug_info_t *dbf_grp, int level) | |
110 | { | |
111 | return (level <= dbf_grp->level); | |
112 | } | |
113 | ||
114 | #define IUCV_DBF_TEXT_(name, level, text...) \ | |
115 | do { \ | |
116 | if (iucv_dbf_passes(iucv_dbf_##name, level)) { \ | |
390dfd95 TH |
117 | char* __buf = get_cpu_var(iucv_dbf_txt_buf); \ |
118 | sprintf(__buf, text); \ | |
119 | debug_text_event(iucv_dbf_##name, level, __buf); \ | |
f33780d3 PT |
120 | put_cpu_var(iucv_dbf_txt_buf); \ |
121 | } \ | |
eebce385 MS |
122 | } while (0) |
123 | ||
124 | #define IUCV_DBF_SPRINTF(name,level,text...) \ | |
125 | do { \ | |
126 | debug_sprintf_event(iucv_dbf_trace, level, ##text ); \ | |
127 | debug_sprintf_event(iucv_dbf_trace, level, text ); \ | |
128 | } while (0) | |
129 | ||
130 | /** | |
131 | * some more debug stuff | |
132 | */ | |
133 | #define IUCV_HEXDUMP16(importance,header,ptr) \ | |
134 | PRINT_##importance(header "%02x %02x %02x %02x %02x %02x %02x %02x " \ | |
135 | "%02x %02x %02x %02x %02x %02x %02x %02x\n", \ | |
136 | *(((char*)ptr)),*(((char*)ptr)+1),*(((char*)ptr)+2), \ | |
137 | *(((char*)ptr)+3),*(((char*)ptr)+4),*(((char*)ptr)+5), \ | |
138 | *(((char*)ptr)+6),*(((char*)ptr)+7),*(((char*)ptr)+8), \ | |
139 | *(((char*)ptr)+9),*(((char*)ptr)+10),*(((char*)ptr)+11), \ | |
140 | *(((char*)ptr)+12),*(((char*)ptr)+13), \ | |
141 | *(((char*)ptr)+14),*(((char*)ptr)+15)); \ | |
142 | PRINT_##importance(header "%02x %02x %02x %02x %02x %02x %02x %02x " \ | |
143 | "%02x %02x %02x %02x %02x %02x %02x %02x\n", \ | |
144 | *(((char*)ptr)+16),*(((char*)ptr)+17), \ | |
145 | *(((char*)ptr)+18),*(((char*)ptr)+19), \ | |
146 | *(((char*)ptr)+20),*(((char*)ptr)+21), \ | |
147 | *(((char*)ptr)+22),*(((char*)ptr)+23), \ | |
148 | *(((char*)ptr)+24),*(((char*)ptr)+25), \ | |
149 | *(((char*)ptr)+26),*(((char*)ptr)+27), \ | |
150 | *(((char*)ptr)+28),*(((char*)ptr)+29), \ | |
151 | *(((char*)ptr)+30),*(((char*)ptr)+31)); | |
152 | ||
1da177e4 LT |
153 | #define PRINTK_HEADER " iucv: " /* for debugging */ |
154 | ||
1175b257 UB |
155 | /* dummy device to make sure netiucv_pm functions are called */ |
156 | static struct device *netiucv_dev; | |
157 | ||
158 | static int netiucv_pm_prepare(struct device *); | |
159 | static void netiucv_pm_complete(struct device *); | |
160 | static int netiucv_pm_freeze(struct device *); | |
161 | static int netiucv_pm_restore_thaw(struct device *); | |
162 | ||
47145210 | 163 | static const struct dev_pm_ops netiucv_pm_ops = { |
1175b257 UB |
164 | .prepare = netiucv_pm_prepare, |
165 | .complete = netiucv_pm_complete, | |
166 | .freeze = netiucv_pm_freeze, | |
167 | .thaw = netiucv_pm_restore_thaw, | |
168 | .restore = netiucv_pm_restore_thaw, | |
169 | }; | |
170 | ||
1da177e4 | 171 | static struct device_driver netiucv_driver = { |
2219510f | 172 | .owner = THIS_MODULE, |
1da177e4 LT |
173 | .name = "netiucv", |
174 | .bus = &iucv_bus, | |
1175b257 | 175 | .pm = &netiucv_pm_ops, |
1da177e4 LT |
176 | }; |
177 | ||
eebce385 MS |
178 | static int netiucv_callback_connreq(struct iucv_path *, |
179 | u8 ipvmid[8], u8 ipuser[16]); | |
180 | static void netiucv_callback_connack(struct iucv_path *, u8 ipuser[16]); | |
181 | static void netiucv_callback_connrej(struct iucv_path *, u8 ipuser[16]); | |
182 | static void netiucv_callback_connsusp(struct iucv_path *, u8 ipuser[16]); | |
183 | static void netiucv_callback_connres(struct iucv_path *, u8 ipuser[16]); | |
184 | static void netiucv_callback_rx(struct iucv_path *, struct iucv_message *); | |
185 | static void netiucv_callback_txdone(struct iucv_path *, struct iucv_message *); | |
186 | ||
187 | static struct iucv_handler netiucv_handler = { | |
188 | .path_pending = netiucv_callback_connreq, | |
189 | .path_complete = netiucv_callback_connack, | |
190 | .path_severed = netiucv_callback_connrej, | |
191 | .path_quiesced = netiucv_callback_connsusp, | |
192 | .path_resumed = netiucv_callback_connres, | |
193 | .message_pending = netiucv_callback_rx, | |
194 | .message_complete = netiucv_callback_txdone | |
195 | }; | |
196 | ||
1da177e4 LT |
197 | /** |
198 | * Per connection profiling data | |
199 | */ | |
200 | struct connection_profile { | |
201 | unsigned long maxmulti; | |
202 | unsigned long maxcqueue; | |
203 | unsigned long doios_single; | |
204 | unsigned long doios_multi; | |
205 | unsigned long txlen; | |
206 | unsigned long tx_time; | |
207 | struct timespec send_stamp; | |
208 | unsigned long tx_pending; | |
209 | unsigned long tx_max_pending; | |
210 | }; | |
211 | ||
212 | /** | |
213 | * Representation of one iucv connection | |
214 | */ | |
215 | struct iucv_connection { | |
eebce385 MS |
216 | struct list_head list; |
217 | struct iucv_path *path; | |
1da177e4 LT |
218 | struct sk_buff *rx_buff; |
219 | struct sk_buff *tx_buff; | |
220 | struct sk_buff_head collect_queue; | |
221 | struct sk_buff_head commit_queue; | |
222 | spinlock_t collect_lock; | |
223 | int collect_len; | |
224 | int max_buffsize; | |
225 | fsm_timer timer; | |
226 | fsm_instance *fsm; | |
227 | struct net_device *netdev; | |
228 | struct connection_profile prof; | |
229 | char userid[9]; | |
08e3356c | 230 | char userdata[17]; |
1da177e4 LT |
231 | }; |
232 | ||
233 | /** | |
234 | * Linked list of all connection structs. | |
235 | */ | |
c11ca97e | 236 | static LIST_HEAD(iucv_connection_list); |
bfac0d0b | 237 | static DEFINE_RWLOCK(iucv_connection_rwlock); |
1da177e4 LT |
238 | |
239 | /** | |
240 | * Representation of event-data for the | |
241 | * connection state machine. | |
242 | */ | |
243 | struct iucv_event { | |
244 | struct iucv_connection *conn; | |
245 | void *data; | |
246 | }; | |
247 | ||
248 | /** | |
249 | * Private part of the network device structure | |
250 | */ | |
251 | struct netiucv_priv { | |
252 | struct net_device_stats stats; | |
253 | unsigned long tbusy; | |
254 | fsm_instance *fsm; | |
255 | struct iucv_connection *conn; | |
256 | struct device *dev; | |
1175b257 | 257 | int pm_state; |
1da177e4 LT |
258 | }; |
259 | ||
260 | /** | |
261 | * Link level header for a packet. | |
262 | */ | |
eebce385 MS |
263 | struct ll_header { |
264 | u16 next; | |
265 | }; | |
1da177e4 | 266 | |
eebce385 | 267 | #define NETIUCV_HDRLEN (sizeof(struct ll_header)) |
08e3356c | 268 | #define NETIUCV_BUFSIZE_MAX 65537 |
1da177e4 LT |
269 | #define NETIUCV_BUFSIZE_DEFAULT NETIUCV_BUFSIZE_MAX |
270 | #define NETIUCV_MTU_MAX (NETIUCV_BUFSIZE_MAX - NETIUCV_HDRLEN) | |
271 | #define NETIUCV_MTU_DEFAULT 9216 | |
272 | #define NETIUCV_QUEUELEN_DEFAULT 50 | |
273 | #define NETIUCV_TIMEOUT_5SEC 5000 | |
274 | ||
275 | /** | |
276 | * Compatibility macros for busy handling | |
277 | * of network devices. | |
278 | */ | |
eebce385 | 279 | static inline void netiucv_clear_busy(struct net_device *dev) |
1da177e4 | 280 | { |
eebce385 MS |
281 | struct netiucv_priv *priv = netdev_priv(dev); |
282 | clear_bit(0, &priv->tbusy); | |
1da177e4 LT |
283 | netif_wake_queue(dev); |
284 | } | |
285 | ||
eebce385 | 286 | static inline int netiucv_test_and_set_busy(struct net_device *dev) |
1da177e4 | 287 | { |
eebce385 | 288 | struct netiucv_priv *priv = netdev_priv(dev); |
1da177e4 | 289 | netif_stop_queue(dev); |
eebce385 | 290 | return test_and_set_bit(0, &priv->tbusy); |
1da177e4 LT |
291 | } |
292 | ||
08e3356c UB |
293 | static u8 iucvMagic_ascii[16] = { |
294 | 0x30, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, | |
295 | 0x30, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20 | |
296 | }; | |
297 | ||
298 | static u8 iucvMagic_ebcdic[16] = { | |
1da177e4 LT |
299 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, |
300 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40 | |
301 | }; | |
302 | ||
1da177e4 LT |
303 | /** |
304 | * Convert an iucv userId to its printable | |
305 | * form (strip whitespace at end). | |
306 | * | |
307 | * @param An iucv userId | |
308 | * | |
309 | * @returns The printable string (static data!!) | |
310 | */ | |
08e3356c | 311 | static char *netiucv_printname(char *name, int len) |
1da177e4 | 312 | { |
08e3356c | 313 | static char tmp[17]; |
1da177e4 | 314 | char *p = tmp; |
08e3356c UB |
315 | memcpy(tmp, name, len); |
316 | tmp[len] = '\0'; | |
317 | while (*p && ((p - tmp) < len) && (!isspace(*p))) | |
1da177e4 LT |
318 | p++; |
319 | *p = '\0'; | |
320 | return tmp; | |
321 | } | |
e82b0f2c | 322 | |
08e3356c UB |
323 | static char *netiucv_printuser(struct iucv_connection *conn) |
324 | { | |
325 | static char tmp_uid[9]; | |
326 | static char tmp_udat[17]; | |
327 | static char buf[100]; | |
328 | ||
329 | if (memcmp(conn->userdata, iucvMagic_ebcdic, 16)) { | |
330 | tmp_uid[8] = '\0'; | |
331 | tmp_udat[16] = '\0'; | |
332 | memcpy(tmp_uid, conn->userid, 8); | |
333 | memcpy(tmp_uid, netiucv_printname(tmp_uid, 8), 8); | |
334 | memcpy(tmp_udat, conn->userdata, 16); | |
335 | EBCASC(tmp_udat, 16); | |
336 | memcpy(tmp_udat, netiucv_printname(tmp_udat, 16), 16); | |
337 | sprintf(buf, "%s.%s", tmp_uid, tmp_udat); | |
338 | return buf; | |
339 | } else | |
340 | return netiucv_printname(conn->userid, 8); | |
341 | } | |
342 | ||
1da177e4 LT |
343 | /** |
344 | * States of the interface statemachine. | |
345 | */ | |
346 | enum dev_states { | |
347 | DEV_STATE_STOPPED, | |
348 | DEV_STATE_STARTWAIT, | |
349 | DEV_STATE_STOPWAIT, | |
350 | DEV_STATE_RUNNING, | |
351 | /** | |
352 | * MUST be always the last element!! | |
353 | */ | |
354 | NR_DEV_STATES | |
355 | }; | |
356 | ||
357 | static const char *dev_state_names[] = { | |
358 | "Stopped", | |
359 | "StartWait", | |
360 | "StopWait", | |
361 | "Running", | |
362 | }; | |
363 | ||
364 | /** | |
365 | * Events of the interface statemachine. | |
366 | */ | |
367 | enum dev_events { | |
368 | DEV_EVENT_START, | |
369 | DEV_EVENT_STOP, | |
370 | DEV_EVENT_CONUP, | |
371 | DEV_EVENT_CONDOWN, | |
372 | /** | |
373 | * MUST be always the last element!! | |
374 | */ | |
375 | NR_DEV_EVENTS | |
376 | }; | |
377 | ||
378 | static const char *dev_event_names[] = { | |
379 | "Start", | |
380 | "Stop", | |
381 | "Connection up", | |
382 | "Connection down", | |
383 | }; | |
e82b0f2c | 384 | |
1da177e4 LT |
385 | /** |
386 | * Events of the connection statemachine | |
387 | */ | |
388 | enum conn_events { | |
389 | /** | |
390 | * Events, representing callbacks from | |
391 | * lowlevel iucv layer) | |
392 | */ | |
393 | CONN_EVENT_CONN_REQ, | |
394 | CONN_EVENT_CONN_ACK, | |
395 | CONN_EVENT_CONN_REJ, | |
396 | CONN_EVENT_CONN_SUS, | |
397 | CONN_EVENT_CONN_RES, | |
398 | CONN_EVENT_RX, | |
399 | CONN_EVENT_TXDONE, | |
400 | ||
401 | /** | |
402 | * Events, representing errors return codes from | |
403 | * calls to lowlevel iucv layer | |
404 | */ | |
405 | ||
406 | /** | |
407 | * Event, representing timer expiry. | |
408 | */ | |
409 | CONN_EVENT_TIMER, | |
410 | ||
411 | /** | |
412 | * Events, representing commands from upper levels. | |
413 | */ | |
414 | CONN_EVENT_START, | |
415 | CONN_EVENT_STOP, | |
416 | ||
417 | /** | |
418 | * MUST be always the last element!! | |
419 | */ | |
420 | NR_CONN_EVENTS, | |
421 | }; | |
422 | ||
423 | static const char *conn_event_names[] = { | |
424 | "Remote connection request", | |
425 | "Remote connection acknowledge", | |
426 | "Remote connection reject", | |
427 | "Connection suspended", | |
428 | "Connection resumed", | |
429 | "Data received", | |
430 | "Data sent", | |
431 | ||
432 | "Timer", | |
433 | ||
434 | "Start", | |
435 | "Stop", | |
436 | }; | |
437 | ||
438 | /** | |
439 | * States of the connection statemachine. | |
440 | */ | |
441 | enum conn_states { | |
442 | /** | |
443 | * Connection not assigned to any device, | |
444 | * initial state, invalid | |
445 | */ | |
446 | CONN_STATE_INVALID, | |
447 | ||
448 | /** | |
449 | * Userid assigned but not operating | |
450 | */ | |
451 | CONN_STATE_STOPPED, | |
452 | ||
453 | /** | |
454 | * Connection registered, | |
455 | * no connection request sent yet, | |
456 | * no connection request received | |
457 | */ | |
458 | CONN_STATE_STARTWAIT, | |
459 | ||
460 | /** | |
461 | * Connection registered and connection request sent, | |
462 | * no acknowledge and no connection request received yet. | |
463 | */ | |
464 | CONN_STATE_SETUPWAIT, | |
465 | ||
466 | /** | |
467 | * Connection up and running idle | |
468 | */ | |
469 | CONN_STATE_IDLE, | |
470 | ||
471 | /** | |
472 | * Data sent, awaiting CONN_EVENT_TXDONE | |
473 | */ | |
474 | CONN_STATE_TX, | |
475 | ||
476 | /** | |
477 | * Error during registration. | |
478 | */ | |
479 | CONN_STATE_REGERR, | |
480 | ||
481 | /** | |
482 | * Error during registration. | |
483 | */ | |
484 | CONN_STATE_CONNERR, | |
485 | ||
486 | /** | |
487 | * MUST be always the last element!! | |
488 | */ | |
489 | NR_CONN_STATES, | |
490 | }; | |
491 | ||
492 | static const char *conn_state_names[] = { | |
493 | "Invalid", | |
494 | "Stopped", | |
495 | "StartWait", | |
496 | "SetupWait", | |
497 | "Idle", | |
498 | "TX", | |
499 | "Terminating", | |
500 | "Registration error", | |
501 | "Connect error", | |
502 | }; | |
503 | ||
e82b0f2c | 504 | |
1da177e4 LT |
505 | /** |
506 | * Debug Facility Stuff | |
507 | */ | |
508 | static debug_info_t *iucv_dbf_setup = NULL; | |
509 | static debug_info_t *iucv_dbf_data = NULL; | |
510 | static debug_info_t *iucv_dbf_trace = NULL; | |
511 | ||
512 | DEFINE_PER_CPU(char[256], iucv_dbf_txt_buf); | |
513 | ||
eebce385 | 514 | static void iucv_unregister_dbf_views(void) |
1da177e4 LT |
515 | { |
516 | if (iucv_dbf_setup) | |
517 | debug_unregister(iucv_dbf_setup); | |
518 | if (iucv_dbf_data) | |
519 | debug_unregister(iucv_dbf_data); | |
520 | if (iucv_dbf_trace) | |
521 | debug_unregister(iucv_dbf_trace); | |
522 | } | |
eebce385 | 523 | static int iucv_register_dbf_views(void) |
1da177e4 LT |
524 | { |
525 | iucv_dbf_setup = debug_register(IUCV_DBF_SETUP_NAME, | |
66a464db | 526 | IUCV_DBF_SETUP_PAGES, |
1da177e4 LT |
527 | IUCV_DBF_SETUP_NR_AREAS, |
528 | IUCV_DBF_SETUP_LEN); | |
529 | iucv_dbf_data = debug_register(IUCV_DBF_DATA_NAME, | |
66a464db | 530 | IUCV_DBF_DATA_PAGES, |
1da177e4 LT |
531 | IUCV_DBF_DATA_NR_AREAS, |
532 | IUCV_DBF_DATA_LEN); | |
533 | iucv_dbf_trace = debug_register(IUCV_DBF_TRACE_NAME, | |
66a464db | 534 | IUCV_DBF_TRACE_PAGES, |
1da177e4 LT |
535 | IUCV_DBF_TRACE_NR_AREAS, |
536 | IUCV_DBF_TRACE_LEN); | |
537 | ||
538 | if ((iucv_dbf_setup == NULL) || (iucv_dbf_data == NULL) || | |
539 | (iucv_dbf_trace == NULL)) { | |
540 | iucv_unregister_dbf_views(); | |
541 | return -ENOMEM; | |
542 | } | |
543 | debug_register_view(iucv_dbf_setup, &debug_hex_ascii_view); | |
544 | debug_set_level(iucv_dbf_setup, IUCV_DBF_SETUP_LEVEL); | |
545 | ||
546 | debug_register_view(iucv_dbf_data, &debug_hex_ascii_view); | |
547 | debug_set_level(iucv_dbf_data, IUCV_DBF_DATA_LEVEL); | |
548 | ||
549 | debug_register_view(iucv_dbf_trace, &debug_hex_ascii_view); | |
550 | debug_set_level(iucv_dbf_trace, IUCV_DBF_TRACE_LEVEL); | |
551 | ||
552 | return 0; | |
553 | } | |
554 | ||
eebce385 | 555 | /* |
1da177e4 | 556 | * Callback-wrappers, called from lowlevel iucv layer. |
eebce385 | 557 | */ |
1da177e4 | 558 | |
eebce385 MS |
559 | static void netiucv_callback_rx(struct iucv_path *path, |
560 | struct iucv_message *msg) | |
1da177e4 | 561 | { |
eebce385 | 562 | struct iucv_connection *conn = path->private; |
1da177e4 LT |
563 | struct iucv_event ev; |
564 | ||
565 | ev.conn = conn; | |
eebce385 | 566 | ev.data = msg; |
1da177e4 LT |
567 | fsm_event(conn->fsm, CONN_EVENT_RX, &ev); |
568 | } | |
569 | ||
eebce385 MS |
570 | static void netiucv_callback_txdone(struct iucv_path *path, |
571 | struct iucv_message *msg) | |
1da177e4 | 572 | { |
eebce385 | 573 | struct iucv_connection *conn = path->private; |
1da177e4 LT |
574 | struct iucv_event ev; |
575 | ||
576 | ev.conn = conn; | |
eebce385 | 577 | ev.data = msg; |
1da177e4 LT |
578 | fsm_event(conn->fsm, CONN_EVENT_TXDONE, &ev); |
579 | } | |
580 | ||
eebce385 | 581 | static void netiucv_callback_connack(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 582 | { |
eebce385 | 583 | struct iucv_connection *conn = path->private; |
1da177e4 | 584 | |
eebce385 | 585 | fsm_event(conn->fsm, CONN_EVENT_CONN_ACK, conn); |
1da177e4 LT |
586 | } |
587 | ||
eebce385 MS |
588 | static int netiucv_callback_connreq(struct iucv_path *path, |
589 | u8 ipvmid[8], u8 ipuser[16]) | |
1da177e4 | 590 | { |
eebce385 | 591 | struct iucv_connection *conn = path->private; |
1da177e4 | 592 | struct iucv_event ev; |
08e3356c UB |
593 | static char tmp_user[9]; |
594 | static char tmp_udat[17]; | |
eebce385 | 595 | int rc; |
1da177e4 | 596 | |
eebce385 | 597 | rc = -EINVAL; |
08e3356c UB |
598 | memcpy(tmp_user, netiucv_printname(ipvmid, 8), 8); |
599 | memcpy(tmp_udat, ipuser, 16); | |
600 | EBCASC(tmp_udat, 16); | |
eebce385 MS |
601 | read_lock_bh(&iucv_connection_rwlock); |
602 | list_for_each_entry(conn, &iucv_connection_list, list) { | |
08e3356c UB |
603 | if (strncmp(ipvmid, conn->userid, 8) || |
604 | strncmp(ipuser, conn->userdata, 16)) | |
eebce385 MS |
605 | continue; |
606 | /* Found a matching connection for this path. */ | |
607 | conn->path = path; | |
608 | ev.conn = conn; | |
609 | ev.data = path; | |
610 | fsm_event(conn->fsm, CONN_EVENT_CONN_REQ, &ev); | |
611 | rc = 0; | |
612 | } | |
08e3356c UB |
613 | IUCV_DBF_TEXT_(setup, 2, "Connection requested for %s.%s\n", |
614 | tmp_user, netiucv_printname(tmp_udat, 16)); | |
eebce385 MS |
615 | read_unlock_bh(&iucv_connection_rwlock); |
616 | return rc; | |
1da177e4 LT |
617 | } |
618 | ||
eebce385 | 619 | static void netiucv_callback_connrej(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 620 | { |
eebce385 | 621 | struct iucv_connection *conn = path->private; |
1da177e4 | 622 | |
eebce385 | 623 | fsm_event(conn->fsm, CONN_EVENT_CONN_REJ, conn); |
1da177e4 LT |
624 | } |
625 | ||
eebce385 | 626 | static void netiucv_callback_connsusp(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 627 | { |
eebce385 | 628 | struct iucv_connection *conn = path->private; |
1da177e4 | 629 | |
eebce385 | 630 | fsm_event(conn->fsm, CONN_EVENT_CONN_SUS, conn); |
1da177e4 LT |
631 | } |
632 | ||
eebce385 | 633 | static void netiucv_callback_connres(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 634 | { |
eebce385 | 635 | struct iucv_connection *conn = path->private; |
1da177e4 | 636 | |
eebce385 MS |
637 | fsm_event(conn->fsm, CONN_EVENT_CONN_RES, conn); |
638 | } | |
1da177e4 LT |
639 | |
640 | /** | |
21b26f2f | 641 | * NOP action for statemachines |
1da177e4 | 642 | */ |
21b26f2f | 643 | static void netiucv_action_nop(fsm_instance *fi, int event, void *arg) |
1da177e4 LT |
644 | { |
645 | } | |
e82b0f2c | 646 | |
eebce385 | 647 | /* |
1da177e4 | 648 | * Actions of the connection statemachine |
eebce385 | 649 | */ |
1da177e4 LT |
650 | |
651 | /** | |
eebce385 MS |
652 | * netiucv_unpack_skb |
653 | * @conn: The connection where this skb has been received. | |
654 | * @pskb: The received skb. | |
1da177e4 | 655 | * |
eebce385 MS |
656 | * Unpack a just received skb and hand it over to upper layers. |
657 | * Helper function for conn_action_rx. | |
1da177e4 | 658 | */ |
eebce385 MS |
659 | static void netiucv_unpack_skb(struct iucv_connection *conn, |
660 | struct sk_buff *pskb) | |
1da177e4 LT |
661 | { |
662 | struct net_device *dev = conn->netdev; | |
eebce385 MS |
663 | struct netiucv_priv *privptr = netdev_priv(dev); |
664 | u16 offset = 0; | |
1da177e4 LT |
665 | |
666 | skb_put(pskb, NETIUCV_HDRLEN); | |
667 | pskb->dev = dev; | |
668 | pskb->ip_summed = CHECKSUM_NONE; | |
669 | pskb->protocol = ntohs(ETH_P_IP); | |
670 | ||
671 | while (1) { | |
672 | struct sk_buff *skb; | |
eebce385 | 673 | struct ll_header *header = (struct ll_header *) pskb->data; |
1da177e4 LT |
674 | |
675 | if (!header->next) | |
676 | break; | |
677 | ||
678 | skb_pull(pskb, NETIUCV_HDRLEN); | |
679 | header->next -= offset; | |
680 | offset += header->next; | |
681 | header->next -= NETIUCV_HDRLEN; | |
682 | if (skb_tailroom(pskb) < header->next) { | |
1da177e4 LT |
683 | IUCV_DBF_TEXT_(data, 2, "Illegal next field: %d > %d\n", |
684 | header->next, skb_tailroom(pskb)); | |
685 | return; | |
686 | } | |
687 | skb_put(pskb, header->next); | |
459a98ed | 688 | skb_reset_mac_header(pskb); |
1da177e4 LT |
689 | skb = dev_alloc_skb(pskb->len); |
690 | if (!skb) { | |
1da177e4 LT |
691 | IUCV_DBF_TEXT(data, 2, |
692 | "Out of memory in netiucv_unpack_skb\n"); | |
693 | privptr->stats.rx_dropped++; | |
694 | return; | |
695 | } | |
d626f62b ACM |
696 | skb_copy_from_linear_data(pskb, skb_put(skb, pskb->len), |
697 | pskb->len); | |
459a98ed | 698 | skb_reset_mac_header(skb); |
1da177e4 LT |
699 | skb->dev = pskb->dev; |
700 | skb->protocol = pskb->protocol; | |
701 | pskb->ip_summed = CHECKSUM_UNNECESSARY; | |
9b3efc01 JL |
702 | privptr->stats.rx_packets++; |
703 | privptr->stats.rx_bytes += skb->len; | |
1da177e4 LT |
704 | /* |
705 | * Since receiving is always initiated from a tasklet (in iucv.c), | |
706 | * we must use netif_rx_ni() instead of netif_rx() | |
707 | */ | |
708 | netif_rx_ni(skb); | |
1da177e4 LT |
709 | skb_pull(pskb, header->next); |
710 | skb_put(pskb, NETIUCV_HDRLEN); | |
711 | } | |
712 | } | |
713 | ||
eebce385 | 714 | static void conn_action_rx(fsm_instance *fi, int event, void *arg) |
1da177e4 | 715 | { |
eebce385 | 716 | struct iucv_event *ev = arg; |
1da177e4 | 717 | struct iucv_connection *conn = ev->conn; |
eebce385 MS |
718 | struct iucv_message *msg = ev->data; |
719 | struct netiucv_priv *privptr = netdev_priv(conn->netdev); | |
1da177e4 LT |
720 | int rc; |
721 | ||
2a2cf6b1 | 722 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
723 | |
724 | if (!conn->netdev) { | |
eebce385 | 725 | iucv_message_reject(conn->path, msg); |
1da177e4 | 726 | IUCV_DBF_TEXT(data, 2, |
eebce385 | 727 | "Received data for unlinked connection\n"); |
1da177e4 LT |
728 | return; |
729 | } | |
eebce385 MS |
730 | if (msg->length > conn->max_buffsize) { |
731 | iucv_message_reject(conn->path, msg); | |
1da177e4 | 732 | privptr->stats.rx_dropped++; |
1da177e4 | 733 | IUCV_DBF_TEXT_(data, 2, "msglen %d > max_buffsize %d\n", |
eebce385 | 734 | msg->length, conn->max_buffsize); |
1da177e4 LT |
735 | return; |
736 | } | |
27a884dc ACM |
737 | conn->rx_buff->data = conn->rx_buff->head; |
738 | skb_reset_tail_pointer(conn->rx_buff); | |
1da177e4 | 739 | conn->rx_buff->len = 0; |
eebce385 MS |
740 | rc = iucv_message_receive(conn->path, msg, 0, conn->rx_buff->data, |
741 | msg->length, NULL); | |
742 | if (rc || msg->length < 5) { | |
1da177e4 | 743 | privptr->stats.rx_errors++; |
1da177e4 LT |
744 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_receive\n", rc); |
745 | return; | |
746 | } | |
747 | netiucv_unpack_skb(conn, conn->rx_buff); | |
748 | } | |
749 | ||
eebce385 | 750 | static void conn_action_txdone(fsm_instance *fi, int event, void *arg) |
1da177e4 | 751 | { |
eebce385 | 752 | struct iucv_event *ev = arg; |
1da177e4 | 753 | struct iucv_connection *conn = ev->conn; |
eebce385 MS |
754 | struct iucv_message *msg = ev->data; |
755 | struct iucv_message txmsg; | |
1da177e4 | 756 | struct netiucv_priv *privptr = NULL; |
eebce385 MS |
757 | u32 single_flag = msg->tag; |
758 | u32 txbytes = 0; | |
759 | u32 txpackets = 0; | |
760 | u32 stat_maxcq = 0; | |
1da177e4 LT |
761 | struct sk_buff *skb; |
762 | unsigned long saveflags; | |
eebce385 MS |
763 | struct ll_header header; |
764 | int rc; | |
1da177e4 | 765 | |
2a2cf6b1 | 766 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 | 767 | |
eebce385 MS |
768 | if (conn && conn->netdev) |
769 | privptr = netdev_priv(conn->netdev); | |
1da177e4 LT |
770 | conn->prof.tx_pending--; |
771 | if (single_flag) { | |
772 | if ((skb = skb_dequeue(&conn->commit_queue))) { | |
773 | atomic_dec(&skb->users); | |
1da177e4 LT |
774 | if (privptr) { |
775 | privptr->stats.tx_packets++; | |
776 | privptr->stats.tx_bytes += | |
777 | (skb->len - NETIUCV_HDRLEN | |
998221c2 | 778 | - NETIUCV_HDRLEN); |
1da177e4 | 779 | } |
998221c2 | 780 | dev_kfree_skb_any(skb); |
1da177e4 LT |
781 | } |
782 | } | |
27a884dc ACM |
783 | conn->tx_buff->data = conn->tx_buff->head; |
784 | skb_reset_tail_pointer(conn->tx_buff); | |
1da177e4 LT |
785 | conn->tx_buff->len = 0; |
786 | spin_lock_irqsave(&conn->collect_lock, saveflags); | |
787 | while ((skb = skb_dequeue(&conn->collect_queue))) { | |
788 | header.next = conn->tx_buff->len + skb->len + NETIUCV_HDRLEN; | |
789 | memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, | |
790 | NETIUCV_HDRLEN); | |
d626f62b ACM |
791 | skb_copy_from_linear_data(skb, |
792 | skb_put(conn->tx_buff, skb->len), | |
793 | skb->len); | |
1da177e4 LT |
794 | txbytes += skb->len; |
795 | txpackets++; | |
796 | stat_maxcq++; | |
797 | atomic_dec(&skb->users); | |
798 | dev_kfree_skb_any(skb); | |
799 | } | |
800 | if (conn->collect_len > conn->prof.maxmulti) | |
801 | conn->prof.maxmulti = conn->collect_len; | |
802 | conn->collect_len = 0; | |
803 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); | |
eebce385 MS |
804 | if (conn->tx_buff->len == 0) { |
805 | fsm_newstate(fi, CONN_STATE_IDLE); | |
806 | return; | |
807 | } | |
1da177e4 | 808 | |
eebce385 MS |
809 | header.next = 0; |
810 | memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
2c6b47de | 811 | conn->prof.send_stamp = current_kernel_time(); |
eebce385 MS |
812 | txmsg.class = 0; |
813 | txmsg.tag = 0; | |
814 | rc = iucv_message_send(conn->path, &txmsg, 0, 0, | |
1da177e4 | 815 | conn->tx_buff->data, conn->tx_buff->len); |
eebce385 MS |
816 | conn->prof.doios_multi++; |
817 | conn->prof.txlen += conn->tx_buff->len; | |
818 | conn->prof.tx_pending++; | |
819 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) | |
820 | conn->prof.tx_max_pending = conn->prof.tx_pending; | |
821 | if (rc) { | |
822 | conn->prof.tx_pending--; | |
1da177e4 | 823 | fsm_newstate(fi, CONN_STATE_IDLE); |
eebce385 MS |
824 | if (privptr) |
825 | privptr->stats.tx_errors += txpackets; | |
eebce385 MS |
826 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); |
827 | } else { | |
828 | if (privptr) { | |
829 | privptr->stats.tx_packets += txpackets; | |
830 | privptr->stats.tx_bytes += txbytes; | |
831 | } | |
832 | if (stat_maxcq > conn->prof.maxcqueue) | |
833 | conn->prof.maxcqueue = stat_maxcq; | |
834 | } | |
1da177e4 LT |
835 | } |
836 | ||
eebce385 | 837 | static void conn_action_connaccept(fsm_instance *fi, int event, void *arg) |
1da177e4 | 838 | { |
eebce385 | 839 | struct iucv_event *ev = arg; |
1da177e4 | 840 | struct iucv_connection *conn = ev->conn; |
eebce385 | 841 | struct iucv_path *path = ev->data; |
1da177e4 | 842 | struct net_device *netdev = conn->netdev; |
eebce385 | 843 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 844 | int rc; |
1da177e4 | 845 | |
2a2cf6b1 | 846 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 847 | |
eebce385 MS |
848 | conn->path = path; |
849 | path->msglim = NETIUCV_QUEUELEN_DEFAULT; | |
850 | path->flags = 0; | |
08e3356c | 851 | rc = iucv_path_accept(path, &netiucv_handler, conn->userdata , conn); |
1da177e4 | 852 | if (rc) { |
1da177e4 LT |
853 | IUCV_DBF_TEXT_(setup, 2, "rc %d from iucv_accept", rc); |
854 | return; | |
855 | } | |
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_connreject(fsm_instance *fi, int event, void *arg) |
1da177e4 | 862 | { |
eebce385 MS |
863 | struct iucv_event *ev = arg; |
864 | struct iucv_path *path = ev->data; | |
1da177e4 | 865 | |
2a2cf6b1 | 866 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 | 867 | iucv_path_sever(path, NULL); |
1da177e4 LT |
868 | } |
869 | ||
eebce385 | 870 | static void conn_action_connack(fsm_instance *fi, int event, void *arg) |
1da177e4 | 871 | { |
eebce385 | 872 | struct iucv_connection *conn = arg; |
1da177e4 | 873 | struct net_device *netdev = conn->netdev; |
eebce385 | 874 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 875 | |
2a2cf6b1 | 876 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
877 | fsm_deltimer(&conn->timer); |
878 | fsm_newstate(fi, CONN_STATE_IDLE); | |
eebce385 | 879 | netdev->tx_queue_len = conn->path->msglim; |
1da177e4 LT |
880 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); |
881 | } | |
882 | ||
eebce385 | 883 | static void conn_action_conntimsev(fsm_instance *fi, int event, void *arg) |
1da177e4 | 884 | { |
eebce385 | 885 | struct iucv_connection *conn = arg; |
1da177e4 | 886 | |
2a2cf6b1 | 887 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 888 | fsm_deltimer(&conn->timer); |
08e3356c | 889 | iucv_path_sever(conn->path, conn->userdata); |
1da177e4 LT |
890 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
891 | } | |
892 | ||
eebce385 | 893 | static void conn_action_connsever(fsm_instance *fi, int event, void *arg) |
1da177e4 | 894 | { |
eebce385 | 895 | struct iucv_connection *conn = arg; |
1da177e4 | 896 | struct net_device *netdev = conn->netdev; |
eebce385 | 897 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 898 | |
2a2cf6b1 | 899 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
900 | |
901 | fsm_deltimer(&conn->timer); | |
08e3356c UB |
902 | iucv_path_sever(conn->path, conn->userdata); |
903 | dev_info(privptr->dev, "The peer z/VM guest %s has closed the " | |
904 | "connection\n", netiucv_printuser(conn)); | |
1da177e4 | 905 | IUCV_DBF_TEXT(data, 2, |
eebce385 | 906 | "conn_action_connsever: Remote dropped connection\n"); |
1da177e4 LT |
907 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
908 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); | |
909 | } | |
910 | ||
eebce385 | 911 | static void conn_action_start(fsm_instance *fi, int event, void *arg) |
1da177e4 | 912 | { |
eebce385 | 913 | struct iucv_connection *conn = arg; |
8f7c502c UB |
914 | struct net_device *netdev = conn->netdev; |
915 | struct netiucv_priv *privptr = netdev_priv(netdev); | |
1da177e4 LT |
916 | int rc; |
917 | ||
2a2cf6b1 | 918 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 919 | |
eebce385 | 920 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
1da177e4 | 921 | |
eebce385 MS |
922 | /* |
923 | * We must set the state before calling iucv_connect because the | |
924 | * callback handler could be called at any point after the connection | |
925 | * request is sent | |
926 | */ | |
1da177e4 LT |
927 | |
928 | fsm_newstate(fi, CONN_STATE_SETUPWAIT); | |
eebce385 | 929 | conn->path = iucv_path_alloc(NETIUCV_QUEUELEN_DEFAULT, 0, GFP_KERNEL); |
08e3356c UB |
930 | IUCV_DBF_TEXT_(setup, 2, "%s: connecting to %s ...\n", |
931 | netdev->name, netiucv_printuser(conn)); | |
932 | ||
eebce385 | 933 | rc = iucv_path_connect(conn->path, &netiucv_handler, conn->userid, |
08e3356c | 934 | NULL, conn->userdata, conn); |
1da177e4 | 935 | switch (rc) { |
eebce385 | 936 | case 0: |
8f7c502c | 937 | netdev->tx_queue_len = conn->path->msglim; |
eebce385 MS |
938 | fsm_addtimer(&conn->timer, NETIUCV_TIMEOUT_5SEC, |
939 | CONN_EVENT_TIMER, conn); | |
940 | return; | |
941 | case 11: | |
8f7c502c UB |
942 | dev_warn(privptr->dev, |
943 | "The IUCV device failed to connect to z/VM guest %s\n", | |
08e3356c | 944 | netiucv_printname(conn->userid, 8)); |
eebce385 MS |
945 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
946 | break; | |
947 | case 12: | |
8f7c502c UB |
948 | dev_warn(privptr->dev, |
949 | "The IUCV device failed to connect to the peer on z/VM" | |
08e3356c | 950 | " guest %s\n", netiucv_printname(conn->userid, 8)); |
eebce385 MS |
951 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
952 | break; | |
953 | case 13: | |
8f7c502c UB |
954 | dev_err(privptr->dev, |
955 | "Connecting the IUCV device would exceed the maximum" | |
956 | " number of IUCV connections\n"); | |
eebce385 MS |
957 | fsm_newstate(fi, CONN_STATE_CONNERR); |
958 | break; | |
959 | case 14: | |
8f7c502c UB |
960 | dev_err(privptr->dev, |
961 | "z/VM guest %s has too many IUCV connections" | |
962 | " to connect with the IUCV device\n", | |
08e3356c | 963 | netiucv_printname(conn->userid, 8)); |
eebce385 MS |
964 | fsm_newstate(fi, CONN_STATE_CONNERR); |
965 | break; | |
966 | case 15: | |
8f7c502c UB |
967 | dev_err(privptr->dev, |
968 | "The IUCV device cannot connect to a z/VM guest with no" | |
969 | " IUCV authorization\n"); | |
eebce385 MS |
970 | fsm_newstate(fi, CONN_STATE_CONNERR); |
971 | break; | |
972 | default: | |
8f7c502c UB |
973 | dev_err(privptr->dev, |
974 | "Connecting the IUCV device failed with error %d\n", | |
975 | rc); | |
eebce385 MS |
976 | fsm_newstate(fi, CONN_STATE_CONNERR); |
977 | break; | |
1da177e4 LT |
978 | } |
979 | IUCV_DBF_TEXT_(setup, 5, "iucv_connect rc is %d\n", rc); | |
eebce385 MS |
980 | kfree(conn->path); |
981 | conn->path = NULL; | |
1da177e4 LT |
982 | } |
983 | ||
eebce385 | 984 | static void netiucv_purge_skb_queue(struct sk_buff_head *q) |
1da177e4 LT |
985 | { |
986 | struct sk_buff *skb; | |
987 | ||
988 | while ((skb = skb_dequeue(q))) { | |
989 | atomic_dec(&skb->users); | |
990 | dev_kfree_skb_any(skb); | |
991 | } | |
992 | } | |
993 | ||
eebce385 | 994 | static void conn_action_stop(fsm_instance *fi, int event, void *arg) |
1da177e4 | 995 | { |
eebce385 | 996 | struct iucv_event *ev = arg; |
1da177e4 LT |
997 | struct iucv_connection *conn = ev->conn; |
998 | struct net_device *netdev = conn->netdev; | |
eebce385 | 999 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 1000 | |
2a2cf6b1 | 1001 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1002 | |
1003 | fsm_deltimer(&conn->timer); | |
1004 | fsm_newstate(fi, CONN_STATE_STOPPED); | |
1005 | netiucv_purge_skb_queue(&conn->collect_queue); | |
eebce385 MS |
1006 | if (conn->path) { |
1007 | IUCV_DBF_TEXT(trace, 5, "calling iucv_path_sever\n"); | |
08e3356c | 1008 | iucv_path_sever(conn->path, conn->userdata); |
eebce385 MS |
1009 | kfree(conn->path); |
1010 | conn->path = NULL; | |
1011 | } | |
1da177e4 LT |
1012 | netiucv_purge_skb_queue(&conn->commit_queue); |
1013 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); | |
1014 | } | |
1015 | ||
eebce385 | 1016 | static void conn_action_inval(fsm_instance *fi, int event, void *arg) |
1da177e4 | 1017 | { |
eebce385 | 1018 | struct iucv_connection *conn = arg; |
1da177e4 LT |
1019 | struct net_device *netdev = conn->netdev; |
1020 | ||
f082bcae UB |
1021 | IUCV_DBF_TEXT_(data, 2, "%s('%s'): conn_action_inval called\n", |
1022 | netdev->name, conn->userid); | |
1da177e4 LT |
1023 | } |
1024 | ||
1025 | static const fsm_node conn_fsm[] = { | |
1026 | { CONN_STATE_INVALID, CONN_EVENT_START, conn_action_inval }, | |
1027 | { CONN_STATE_STOPPED, CONN_EVENT_START, conn_action_start }, | |
1028 | ||
1029 | { CONN_STATE_STOPPED, CONN_EVENT_STOP, conn_action_stop }, | |
1030 | { CONN_STATE_STARTWAIT, CONN_EVENT_STOP, conn_action_stop }, | |
1031 | { CONN_STATE_SETUPWAIT, CONN_EVENT_STOP, conn_action_stop }, | |
1032 | { CONN_STATE_IDLE, CONN_EVENT_STOP, conn_action_stop }, | |
1033 | { CONN_STATE_TX, CONN_EVENT_STOP, conn_action_stop }, | |
1034 | { CONN_STATE_REGERR, CONN_EVENT_STOP, conn_action_stop }, | |
1035 | { CONN_STATE_CONNERR, CONN_EVENT_STOP, conn_action_stop }, | |
1036 | ||
1037 | { CONN_STATE_STOPPED, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
1038 | { CONN_STATE_STARTWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, | |
1039 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, | |
1040 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
1041 | { CONN_STATE_TX, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
1042 | ||
1043 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_ACK, conn_action_connack }, | |
1044 | { CONN_STATE_SETUPWAIT, CONN_EVENT_TIMER, conn_action_conntimsev }, | |
1045 | ||
1046 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
1047 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
1048 | { CONN_STATE_TX, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
1049 | ||
1050 | { CONN_STATE_IDLE, CONN_EVENT_RX, conn_action_rx }, | |
1051 | { CONN_STATE_TX, CONN_EVENT_RX, conn_action_rx }, | |
1052 | ||
1053 | { CONN_STATE_TX, CONN_EVENT_TXDONE, conn_action_txdone }, | |
1054 | { CONN_STATE_IDLE, CONN_EVENT_TXDONE, conn_action_txdone }, | |
1055 | }; | |
1056 | ||
1057 | static const int CONN_FSM_LEN = sizeof(conn_fsm) / sizeof(fsm_node); | |
1058 | ||
e82b0f2c | 1059 | |
eebce385 | 1060 | /* |
1da177e4 | 1061 | * Actions for interface - statemachine. |
eebce385 | 1062 | */ |
1da177e4 LT |
1063 | |
1064 | /** | |
eebce385 MS |
1065 | * dev_action_start |
1066 | * @fi: An instance of an interface statemachine. | |
1067 | * @event: The event, just happened. | |
1068 | * @arg: Generic pointer, casted from struct net_device * upon call. | |
1da177e4 | 1069 | * |
eebce385 | 1070 | * Startup connection by sending CONN_EVENT_START to it. |
1da177e4 | 1071 | */ |
eebce385 | 1072 | static void dev_action_start(fsm_instance *fi, int event, void *arg) |
1da177e4 | 1073 | { |
eebce385 MS |
1074 | struct net_device *dev = arg; |
1075 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 | 1076 | |
2a2cf6b1 | 1077 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 1078 | |
1da177e4 | 1079 | fsm_newstate(fi, DEV_STATE_STARTWAIT); |
eebce385 | 1080 | fsm_event(privptr->conn->fsm, CONN_EVENT_START, privptr->conn); |
1da177e4 LT |
1081 | } |
1082 | ||
1083 | /** | |
1084 | * Shutdown connection by sending CONN_EVENT_STOP to it. | |
1085 | * | |
1086 | * @param fi An instance of an interface statemachine. | |
1087 | * @param event The event, just happened. | |
1088 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1089 | */ | |
1090 | static void | |
1091 | dev_action_stop(fsm_instance *fi, int event, void *arg) | |
1092 | { | |
eebce385 MS |
1093 | struct net_device *dev = arg; |
1094 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 LT |
1095 | struct iucv_event ev; |
1096 | ||
2a2cf6b1 | 1097 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1098 | |
1099 | ev.conn = privptr->conn; | |
1100 | ||
1101 | fsm_newstate(fi, DEV_STATE_STOPWAIT); | |
1102 | fsm_event(privptr->conn->fsm, CONN_EVENT_STOP, &ev); | |
1103 | } | |
1104 | ||
1105 | /** | |
1106 | * Called from connection statemachine | |
1107 | * when a connection is up and running. | |
1108 | * | |
1109 | * @param fi An instance of an interface statemachine. | |
1110 | * @param event The event, just happened. | |
1111 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1112 | */ | |
1113 | static void | |
1114 | dev_action_connup(fsm_instance *fi, int event, void *arg) | |
1115 | { | |
eebce385 MS |
1116 | struct net_device *dev = arg; |
1117 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 | 1118 | |
2a2cf6b1 | 1119 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1120 | |
1121 | switch (fsm_getstate(fi)) { | |
1122 | case DEV_STATE_STARTWAIT: | |
1123 | fsm_newstate(fi, DEV_STATE_RUNNING); | |
8f7c502c UB |
1124 | dev_info(privptr->dev, |
1125 | "The IUCV device has been connected" | |
08e3356c UB |
1126 | " successfully to %s\n", |
1127 | netiucv_printuser(privptr->conn)); | |
1da177e4 LT |
1128 | IUCV_DBF_TEXT(setup, 3, |
1129 | "connection is up and running\n"); | |
1130 | break; | |
1131 | case DEV_STATE_STOPWAIT: | |
1da177e4 LT |
1132 | IUCV_DBF_TEXT(data, 2, |
1133 | "dev_action_connup: in DEV_STATE_STOPWAIT\n"); | |
1134 | break; | |
1135 | } | |
1136 | } | |
1137 | ||
1138 | /** | |
1139 | * Called from connection statemachine | |
1140 | * when a connection has been shutdown. | |
1141 | * | |
1142 | * @param fi An instance of an interface statemachine. | |
1143 | * @param event The event, just happened. | |
1144 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1145 | */ | |
1146 | static void | |
1147 | dev_action_conndown(fsm_instance *fi, int event, void *arg) | |
1148 | { | |
2a2cf6b1 | 1149 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1150 | |
1151 | switch (fsm_getstate(fi)) { | |
1152 | case DEV_STATE_RUNNING: | |
1153 | fsm_newstate(fi, DEV_STATE_STARTWAIT); | |
1154 | break; | |
1155 | case DEV_STATE_STOPWAIT: | |
1156 | fsm_newstate(fi, DEV_STATE_STOPPED); | |
1157 | IUCV_DBF_TEXT(setup, 3, "connection is down\n"); | |
1158 | break; | |
1159 | } | |
1160 | } | |
1161 | ||
1162 | static const fsm_node dev_fsm[] = { | |
1163 | { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start }, | |
1164 | ||
1165 | { DEV_STATE_STOPWAIT, DEV_EVENT_START, dev_action_start }, | |
1166 | { DEV_STATE_STOPWAIT, DEV_EVENT_CONDOWN, dev_action_conndown }, | |
1167 | ||
1168 | { DEV_STATE_STARTWAIT, DEV_EVENT_STOP, dev_action_stop }, | |
1169 | { DEV_STATE_STARTWAIT, DEV_EVENT_CONUP, dev_action_connup }, | |
1170 | ||
1171 | { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop }, | |
1172 | { DEV_STATE_RUNNING, DEV_EVENT_CONDOWN, dev_action_conndown }, | |
21b26f2f | 1173 | { DEV_STATE_RUNNING, DEV_EVENT_CONUP, netiucv_action_nop }, |
1da177e4 LT |
1174 | }; |
1175 | ||
1176 | static const int DEV_FSM_LEN = sizeof(dev_fsm) / sizeof(fsm_node); | |
1177 | ||
1178 | /** | |
1179 | * Transmit a packet. | |
1180 | * This is a helper function for netiucv_tx(). | |
1181 | * | |
1182 | * @param conn Connection to be used for sending. | |
1183 | * @param skb Pointer to struct sk_buff of packet to send. | |
1184 | * The linklevel header has already been set up | |
1185 | * by netiucv_tx(). | |
1186 | * | |
1187 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1188 | */ | |
eebce385 MS |
1189 | static int netiucv_transmit_skb(struct iucv_connection *conn, |
1190 | struct sk_buff *skb) | |
1191 | { | |
1192 | struct iucv_message msg; | |
1da177e4 | 1193 | unsigned long saveflags; |
eebce385 MS |
1194 | struct ll_header header; |
1195 | int rc; | |
1da177e4 LT |
1196 | |
1197 | if (fsm_getstate(conn->fsm) != CONN_STATE_IDLE) { | |
1198 | int l = skb->len + NETIUCV_HDRLEN; | |
1199 | ||
1200 | spin_lock_irqsave(&conn->collect_lock, saveflags); | |
1201 | if (conn->collect_len + l > | |
1202 | (conn->max_buffsize - NETIUCV_HDRLEN)) { | |
1203 | rc = -EBUSY; | |
1204 | IUCV_DBF_TEXT(data, 2, | |
eebce385 | 1205 | "EBUSY from netiucv_transmit_skb\n"); |
1da177e4 LT |
1206 | } else { |
1207 | atomic_inc(&skb->users); | |
1208 | skb_queue_tail(&conn->collect_queue, skb); | |
1209 | conn->collect_len += l; | |
eebce385 | 1210 | rc = 0; |
1da177e4 LT |
1211 | } |
1212 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); | |
1213 | } else { | |
1214 | struct sk_buff *nskb = skb; | |
1215 | /** | |
1216 | * Copy the skb to a new allocated skb in lowmem only if the | |
1217 | * data is located above 2G in memory or tailroom is < 2. | |
1218 | */ | |
27a884dc ACM |
1219 | unsigned long hi = ((unsigned long)(skb_tail_pointer(skb) + |
1220 | NETIUCV_HDRLEN)) >> 31; | |
1da177e4 LT |
1221 | int copied = 0; |
1222 | if (hi || (skb_tailroom(skb) < 2)) { | |
1223 | nskb = alloc_skb(skb->len + NETIUCV_HDRLEN + | |
1224 | NETIUCV_HDRLEN, GFP_ATOMIC | GFP_DMA); | |
1225 | if (!nskb) { | |
1da177e4 LT |
1226 | IUCV_DBF_TEXT(data, 2, "alloc_skb failed\n"); |
1227 | rc = -ENOMEM; | |
1228 | return rc; | |
1229 | } else { | |
1230 | skb_reserve(nskb, NETIUCV_HDRLEN); | |
1231 | memcpy(skb_put(nskb, skb->len), | |
1232 | skb->data, skb->len); | |
1233 | } | |
1234 | copied = 1; | |
1235 | } | |
1236 | /** | |
1237 | * skb now is below 2G and has enough room. Add headers. | |
1238 | */ | |
1239 | header.next = nskb->len + NETIUCV_HDRLEN; | |
1240 | memcpy(skb_push(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
1241 | header.next = 0; | |
1242 | memcpy(skb_put(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
1243 | ||
1244 | fsm_newstate(conn->fsm, CONN_STATE_TX); | |
2c6b47de | 1245 | conn->prof.send_stamp = current_kernel_time(); |
e82b0f2c | 1246 | |
eebce385 MS |
1247 | msg.tag = 1; |
1248 | msg.class = 0; | |
1249 | rc = iucv_message_send(conn->path, &msg, 0, 0, | |
1250 | nskb->data, nskb->len); | |
1da177e4 LT |
1251 | conn->prof.doios_single++; |
1252 | conn->prof.txlen += skb->len; | |
1253 | conn->prof.tx_pending++; | |
1254 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) | |
1255 | conn->prof.tx_max_pending = conn->prof.tx_pending; | |
1256 | if (rc) { | |
1257 | struct netiucv_priv *privptr; | |
1258 | fsm_newstate(conn->fsm, CONN_STATE_IDLE); | |
1259 | conn->prof.tx_pending--; | |
eebce385 | 1260 | privptr = netdev_priv(conn->netdev); |
1da177e4 LT |
1261 | if (privptr) |
1262 | privptr->stats.tx_errors++; | |
1263 | if (copied) | |
1264 | dev_kfree_skb(nskb); | |
1265 | else { | |
1266 | /** | |
1267 | * Remove our headers. They get added | |
1268 | * again on retransmit. | |
1269 | */ | |
1270 | skb_pull(skb, NETIUCV_HDRLEN); | |
1271 | skb_trim(skb, skb->len - NETIUCV_HDRLEN); | |
1272 | } | |
1da177e4 LT |
1273 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); |
1274 | } else { | |
1275 | if (copied) | |
1276 | dev_kfree_skb(skb); | |
1277 | atomic_inc(&nskb->users); | |
1278 | skb_queue_tail(&conn->commit_queue, nskb); | |
1279 | } | |
1280 | } | |
1281 | ||
1282 | return rc; | |
1283 | } | |
e82b0f2c | 1284 | |
eebce385 | 1285 | /* |
1da177e4 | 1286 | * Interface API for upper network layers |
eebce385 | 1287 | */ |
1da177e4 LT |
1288 | |
1289 | /** | |
1290 | * Open an interface. | |
1291 | * Called from generic network layer when ifconfig up is run. | |
1292 | * | |
1293 | * @param dev Pointer to interface struct. | |
1294 | * | |
1295 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1296 | */ | |
eebce385 MS |
1297 | static int netiucv_open(struct net_device *dev) |
1298 | { | |
1299 | struct netiucv_priv *priv = netdev_priv(dev); | |
1300 | ||
1301 | fsm_event(priv->fsm, DEV_EVENT_START, dev); | |
1da177e4 LT |
1302 | return 0; |
1303 | } | |
1304 | ||
1305 | /** | |
1306 | * Close an interface. | |
1307 | * Called from generic network layer when ifconfig down is run. | |
1308 | * | |
1309 | * @param dev Pointer to interface struct. | |
1310 | * | |
1311 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1312 | */ | |
eebce385 MS |
1313 | static int netiucv_close(struct net_device *dev) |
1314 | { | |
1315 | struct netiucv_priv *priv = netdev_priv(dev); | |
1316 | ||
1317 | fsm_event(priv->fsm, DEV_EVENT_STOP, dev); | |
1da177e4 LT |
1318 | return 0; |
1319 | } | |
1320 | ||
1175b257 UB |
1321 | static int netiucv_pm_prepare(struct device *dev) |
1322 | { | |
1323 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1324 | return 0; | |
1325 | } | |
1326 | ||
1327 | static void netiucv_pm_complete(struct device *dev) | |
1328 | { | |
1329 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1330 | return; | |
1331 | } | |
1332 | ||
1333 | /** | |
1334 | * netiucv_pm_freeze() - Freeze PM callback | |
1335 | * @dev: netiucv device | |
1336 | * | |
1337 | * close open netiucv interfaces | |
1338 | */ | |
1339 | static int netiucv_pm_freeze(struct device *dev) | |
1340 | { | |
4f0076f7 | 1341 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1175b257 UB |
1342 | struct net_device *ndev = NULL; |
1343 | int rc = 0; | |
1344 | ||
1345 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1346 | if (priv && priv->conn) | |
1347 | ndev = priv->conn->netdev; | |
1348 | if (!ndev) | |
1349 | goto out; | |
1350 | netif_device_detach(ndev); | |
1351 | priv->pm_state = fsm_getstate(priv->fsm); | |
1352 | rc = netiucv_close(ndev); | |
1353 | out: | |
1354 | return rc; | |
1355 | } | |
1356 | ||
1357 | /** | |
1358 | * netiucv_pm_restore_thaw() - Thaw and restore PM callback | |
1359 | * @dev: netiucv device | |
1360 | * | |
1361 | * re-open netiucv interfaces closed during freeze | |
1362 | */ | |
1363 | static int netiucv_pm_restore_thaw(struct device *dev) | |
1364 | { | |
4f0076f7 | 1365 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1175b257 UB |
1366 | struct net_device *ndev = NULL; |
1367 | int rc = 0; | |
1368 | ||
1369 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1370 | if (priv && priv->conn) | |
1371 | ndev = priv->conn->netdev; | |
1372 | if (!ndev) | |
1373 | goto out; | |
1374 | switch (priv->pm_state) { | |
1375 | case DEV_STATE_RUNNING: | |
1376 | case DEV_STATE_STARTWAIT: | |
1377 | rc = netiucv_open(ndev); | |
1378 | break; | |
1379 | default: | |
1380 | break; | |
1381 | } | |
1382 | netif_device_attach(ndev); | |
1383 | out: | |
1384 | return rc; | |
1385 | } | |
1386 | ||
1da177e4 LT |
1387 | /** |
1388 | * Start transmission of a packet. | |
1389 | * Called from generic network device layer. | |
1390 | * | |
1391 | * @param skb Pointer to buffer containing the packet. | |
1392 | * @param dev Pointer to interface struct. | |
1393 | * | |
1394 | * @return 0 if packet consumed, !0 if packet rejected. | |
1395 | * Note: If we return !0, then the packet is free'd by | |
1396 | * the generic network layer. | |
1397 | */ | |
1398 | static int netiucv_tx(struct sk_buff *skb, struct net_device *dev) | |
1399 | { | |
eebce385 MS |
1400 | struct netiucv_priv *privptr = netdev_priv(dev); |
1401 | int rc; | |
1da177e4 | 1402 | |
2a2cf6b1 | 1403 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1404 | /** |
1405 | * Some sanity checks ... | |
1406 | */ | |
1407 | if (skb == NULL) { | |
1da177e4 LT |
1408 | IUCV_DBF_TEXT(data, 2, "netiucv_tx: skb is NULL\n"); |
1409 | privptr->stats.tx_dropped++; | |
ec634fe3 | 1410 | return NETDEV_TX_OK; |
1da177e4 LT |
1411 | } |
1412 | if (skb_headroom(skb) < NETIUCV_HDRLEN) { | |
1da177e4 LT |
1413 | IUCV_DBF_TEXT(data, 2, |
1414 | "netiucv_tx: skb_headroom < NETIUCV_HDRLEN\n"); | |
1415 | dev_kfree_skb(skb); | |
1416 | privptr->stats.tx_dropped++; | |
ec634fe3 | 1417 | return NETDEV_TX_OK; |
1da177e4 LT |
1418 | } |
1419 | ||
1420 | /** | |
1421 | * If connection is not running, try to restart it | |
e82b0f2c | 1422 | * and throw away packet. |
1da177e4 LT |
1423 | */ |
1424 | if (fsm_getstate(privptr->fsm) != DEV_STATE_RUNNING) { | |
1da177e4 LT |
1425 | dev_kfree_skb(skb); |
1426 | privptr->stats.tx_dropped++; | |
1427 | privptr->stats.tx_errors++; | |
1428 | privptr->stats.tx_carrier_errors++; | |
ec634fe3 | 1429 | return NETDEV_TX_OK; |
1da177e4 LT |
1430 | } |
1431 | ||
1432 | if (netiucv_test_and_set_busy(dev)) { | |
1433 | IUCV_DBF_TEXT(data, 2, "EBUSY from netiucv_tx\n"); | |
4e584d66 | 1434 | return NETDEV_TX_BUSY; |
1da177e4 LT |
1435 | } |
1436 | dev->trans_start = jiffies; | |
5b548140 | 1437 | rc = netiucv_transmit_skb(privptr->conn, skb); |
1da177e4 | 1438 | netiucv_clear_busy(dev); |
5b548140 | 1439 | return rc ? NETDEV_TX_BUSY : NETDEV_TX_OK; |
1da177e4 LT |
1440 | } |
1441 | ||
1442 | /** | |
eebce385 MS |
1443 | * netiucv_stats |
1444 | * @dev: Pointer to interface struct. | |
1da177e4 | 1445 | * |
eebce385 | 1446 | * Returns interface statistics of a device. |
1da177e4 | 1447 | * |
eebce385 | 1448 | * Returns pointer to stats struct of this interface. |
1da177e4 | 1449 | */ |
eebce385 | 1450 | static struct net_device_stats *netiucv_stats (struct net_device * dev) |
1da177e4 | 1451 | { |
eebce385 MS |
1452 | struct netiucv_priv *priv = netdev_priv(dev); |
1453 | ||
2a2cf6b1 | 1454 | IUCV_DBF_TEXT(trace, 5, __func__); |
eebce385 | 1455 | return &priv->stats; |
1da177e4 LT |
1456 | } |
1457 | ||
1458 | /** | |
eebce385 MS |
1459 | * netiucv_change_mtu |
1460 | * @dev: Pointer to interface struct. | |
1461 | * @new_mtu: The new MTU to use for this interface. | |
1da177e4 | 1462 | * |
eebce385 | 1463 | * Sets MTU of an interface. |
1da177e4 | 1464 | * |
eebce385 | 1465 | * Returns 0 on success, -EINVAL if MTU is out of valid range. |
1da177e4 LT |
1466 | * (valid range is 576 .. NETIUCV_MTU_MAX). |
1467 | */ | |
eebce385 | 1468 | static int netiucv_change_mtu(struct net_device * dev, int new_mtu) |
1da177e4 | 1469 | { |
2a2cf6b1 | 1470 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 | 1471 | if (new_mtu < 576 || new_mtu > NETIUCV_MTU_MAX) { |
1da177e4 LT |
1472 | IUCV_DBF_TEXT(setup, 2, "given MTU out of valid range\n"); |
1473 | return -EINVAL; | |
1474 | } | |
1475 | dev->mtu = new_mtu; | |
1476 | return 0; | |
1477 | } | |
1478 | ||
eebce385 | 1479 | /* |
1da177e4 | 1480 | * attributes in sysfs |
eebce385 | 1481 | */ |
1da177e4 | 1482 | |
eebce385 MS |
1483 | static ssize_t user_show(struct device *dev, struct device_attribute *attr, |
1484 | char *buf) | |
1da177e4 | 1485 | { |
dff59b64 | 1486 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1487 | |
2a2cf6b1 | 1488 | IUCV_DBF_TEXT(trace, 5, __func__); |
08e3356c | 1489 | return sprintf(buf, "%s\n", netiucv_printuser(priv->conn)); |
1da177e4 LT |
1490 | } |
1491 | ||
08e3356c UB |
1492 | static int netiucv_check_user(const char *buf, size_t count, char *username, |
1493 | char *userdata) | |
1da177e4 | 1494 | { |
08e3356c UB |
1495 | const char *p; |
1496 | int i; | |
1da177e4 | 1497 | |
08e3356c UB |
1498 | p = strchr(buf, '.'); |
1499 | if ((p && ((count > 26) || | |
1500 | ((p - buf) > 8) || | |
1501 | (buf + count - p > 18))) || | |
1502 | (!p && (count > 9))) { | |
1503 | IUCV_DBF_TEXT(setup, 2, "conn_write: too long\n"); | |
1da177e4 LT |
1504 | return -EINVAL; |
1505 | } | |
1506 | ||
08e3356c UB |
1507 | for (i = 0, p = buf; i < 8 && *p && *p != '.'; i++, p++) { |
1508 | if (isalnum(*p) || *p == '$') { | |
1509 | username[i] = toupper(*p); | |
eebce385 MS |
1510 | continue; |
1511 | } | |
08e3356c | 1512 | if (*p == '\n') |
1da177e4 LT |
1513 | /* trailing lf, grr */ |
1514 | break; | |
eebce385 | 1515 | IUCV_DBF_TEXT_(setup, 2, |
08e3356c | 1516 | "conn_write: invalid character %02x\n", *p); |
eebce385 | 1517 | return -EINVAL; |
1da177e4 | 1518 | } |
eebce385 | 1519 | while (i < 8) |
1da177e4 | 1520 | username[i++] = ' '; |
16a83b30 | 1521 | username[8] = '\0'; |
1da177e4 | 1522 | |
08e3356c UB |
1523 | if (*p == '.') { |
1524 | p++; | |
1525 | for (i = 0; i < 16 && *p; i++, p++) { | |
1526 | if (*p == '\n') | |
1527 | break; | |
1528 | userdata[i] = toupper(*p); | |
1529 | } | |
1530 | while (i > 0 && i < 16) | |
1531 | userdata[i++] = ' '; | |
1532 | } else | |
1533 | memcpy(userdata, iucvMagic_ascii, 16); | |
1534 | userdata[16] = '\0'; | |
1535 | ASCEBC(userdata, 16); | |
1536 | ||
1537 | return 0; | |
1538 | } | |
1539 | ||
1540 | static ssize_t user_write(struct device *dev, struct device_attribute *attr, | |
1541 | const char *buf, size_t count) | |
1542 | { | |
1543 | struct netiucv_priv *priv = dev_get_drvdata(dev); | |
1544 | struct net_device *ndev = priv->conn->netdev; | |
1545 | char username[9]; | |
1546 | char userdata[17]; | |
1547 | int rc; | |
1548 | struct iucv_connection *cp; | |
1549 | ||
1550 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1551 | rc = netiucv_check_user(buf, count, username, userdata); | |
1552 | if (rc) | |
1553 | return rc; | |
1554 | ||
eebce385 MS |
1555 | if (memcmp(username, priv->conn->userid, 9) && |
1556 | (ndev->flags & (IFF_UP | IFF_RUNNING))) { | |
1557 | /* username changed while the interface is active. */ | |
eebce385 | 1558 | IUCV_DBF_TEXT(setup, 2, "user_write: device active\n"); |
f082bcae | 1559 | return -EPERM; |
eebce385 MS |
1560 | } |
1561 | read_lock_bh(&iucv_connection_rwlock); | |
1562 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
08e3356c UB |
1563 | if (!strncmp(username, cp->userid, 9) && |
1564 | !strncmp(userdata, cp->userdata, 17) && cp->netdev != ndev) { | |
eebce385 | 1565 | read_unlock_bh(&iucv_connection_rwlock); |
08e3356c UB |
1566 | IUCV_DBF_TEXT_(setup, 2, "user_write: Connection to %s " |
1567 | "already exists\n", netiucv_printuser(cp)); | |
eebce385 | 1568 | return -EEXIST; |
1da177e4 LT |
1569 | } |
1570 | } | |
eebce385 | 1571 | read_unlock_bh(&iucv_connection_rwlock); |
1da177e4 | 1572 | memcpy(priv->conn->userid, username, 9); |
08e3356c | 1573 | memcpy(priv->conn->userdata, userdata, 17); |
1da177e4 | 1574 | return count; |
1da177e4 LT |
1575 | } |
1576 | ||
1577 | static DEVICE_ATTR(user, 0644, user_show, user_write); | |
1578 | ||
eebce385 MS |
1579 | static ssize_t buffer_show (struct device *dev, struct device_attribute *attr, |
1580 | char *buf) | |
dff59b64 GKH |
1581 | { |
1582 | struct netiucv_priv *priv = dev_get_drvdata(dev); | |
1da177e4 | 1583 | |
2a2cf6b1 | 1584 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1585 | return sprintf(buf, "%d\n", priv->conn->max_buffsize); |
1586 | } | |
1587 | ||
eebce385 MS |
1588 | static ssize_t buffer_write (struct device *dev, struct device_attribute *attr, |
1589 | const char *buf, size_t count) | |
1da177e4 | 1590 | { |
dff59b64 | 1591 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 LT |
1592 | struct net_device *ndev = priv->conn->netdev; |
1593 | char *e; | |
1594 | int bs1; | |
1595 | ||
2a2cf6b1 | 1596 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1597 | if (count >= 39) |
1598 | return -EINVAL; | |
1599 | ||
1600 | bs1 = simple_strtoul(buf, &e, 0); | |
1601 | ||
1602 | if (e && (!isspace(*e))) { | |
08e3356c UB |
1603 | IUCV_DBF_TEXT_(setup, 2, "buffer_write: invalid char %02x\n", |
1604 | *e); | |
1da177e4 LT |
1605 | return -EINVAL; |
1606 | } | |
1607 | if (bs1 > NETIUCV_BUFSIZE_MAX) { | |
1da177e4 LT |
1608 | IUCV_DBF_TEXT_(setup, 2, |
1609 | "buffer_write: buffer size %d too large\n", | |
1610 | bs1); | |
1611 | return -EINVAL; | |
1612 | } | |
1613 | if ((ndev->flags & IFF_RUNNING) && | |
1614 | (bs1 < (ndev->mtu + NETIUCV_HDRLEN + 2))) { | |
1da177e4 LT |
1615 | IUCV_DBF_TEXT_(setup, 2, |
1616 | "buffer_write: buffer size %d too small\n", | |
1617 | bs1); | |
1618 | return -EINVAL; | |
1619 | } | |
1620 | if (bs1 < (576 + NETIUCV_HDRLEN + NETIUCV_HDRLEN)) { | |
1da177e4 LT |
1621 | IUCV_DBF_TEXT_(setup, 2, |
1622 | "buffer_write: buffer size %d too small\n", | |
1623 | bs1); | |
1624 | return -EINVAL; | |
1625 | } | |
1626 | ||
1627 | priv->conn->max_buffsize = bs1; | |
1628 | if (!(ndev->flags & IFF_RUNNING)) | |
1629 | ndev->mtu = bs1 - NETIUCV_HDRLEN - NETIUCV_HDRLEN; | |
1630 | ||
1631 | return count; | |
1632 | ||
1633 | } | |
1634 | ||
1635 | static DEVICE_ATTR(buffer, 0644, buffer_show, buffer_write); | |
1636 | ||
eebce385 MS |
1637 | static ssize_t dev_fsm_show (struct device *dev, struct device_attribute *attr, |
1638 | 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, "%s\n", fsm_getstate_str(priv->fsm)); |
1644 | } | |
1645 | ||
1646 | static DEVICE_ATTR(device_fsm_state, 0444, dev_fsm_show, NULL); | |
1647 | ||
eebce385 MS |
1648 | static ssize_t conn_fsm_show (struct device *dev, |
1649 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1650 | { |
dff59b64 | 1651 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1652 | |
2a2cf6b1 | 1653 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1654 | return sprintf(buf, "%s\n", fsm_getstate_str(priv->conn->fsm)); |
1655 | } | |
1656 | ||
1657 | static DEVICE_ATTR(connection_fsm_state, 0444, conn_fsm_show, NULL); | |
1658 | ||
eebce385 MS |
1659 | static ssize_t maxmulti_show (struct device *dev, |
1660 | struct device_attribute *attr, 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.maxmulti); |
1666 | } | |
1667 | ||
eebce385 MS |
1668 | static ssize_t maxmulti_write (struct device *dev, |
1669 | struct device_attribute *attr, | |
1670 | const char *buf, size_t count) | |
1da177e4 | 1671 | { |
dff59b64 | 1672 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1673 | |
2a2cf6b1 | 1674 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1675 | priv->conn->prof.maxmulti = 0; |
1676 | return count; | |
1677 | } | |
1678 | ||
1679 | static DEVICE_ATTR(max_tx_buffer_used, 0644, maxmulti_show, maxmulti_write); | |
1680 | ||
eebce385 MS |
1681 | static ssize_t maxcq_show (struct device *dev, struct device_attribute *attr, |
1682 | char *buf) | |
1da177e4 | 1683 | { |
dff59b64 | 1684 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1685 | |
2a2cf6b1 | 1686 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1687 | return sprintf(buf, "%ld\n", priv->conn->prof.maxcqueue); |
1688 | } | |
1689 | ||
eebce385 MS |
1690 | static ssize_t maxcq_write (struct device *dev, struct device_attribute *attr, |
1691 | const char *buf, size_t count) | |
1da177e4 | 1692 | { |
dff59b64 | 1693 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
e82b0f2c | 1694 | |
2a2cf6b1 | 1695 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1696 | priv->conn->prof.maxcqueue = 0; |
1697 | return count; | |
1698 | } | |
1699 | ||
1700 | static DEVICE_ATTR(max_chained_skbs, 0644, maxcq_show, maxcq_write); | |
1701 | ||
eebce385 MS |
1702 | static ssize_t sdoio_show (struct device *dev, struct device_attribute *attr, |
1703 | char *buf) | |
1da177e4 | 1704 | { |
dff59b64 | 1705 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1706 | |
2a2cf6b1 | 1707 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1708 | return sprintf(buf, "%ld\n", priv->conn->prof.doios_single); |
1709 | } | |
1710 | ||
eebce385 MS |
1711 | static ssize_t sdoio_write (struct device *dev, struct device_attribute *attr, |
1712 | const char *buf, size_t count) | |
1da177e4 | 1713 | { |
dff59b64 | 1714 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
e82b0f2c | 1715 | |
2a2cf6b1 | 1716 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1717 | priv->conn->prof.doios_single = 0; |
1718 | return count; | |
1719 | } | |
1720 | ||
1721 | static DEVICE_ATTR(tx_single_write_ops, 0644, sdoio_show, sdoio_write); | |
1722 | ||
eebce385 MS |
1723 | static ssize_t mdoio_show (struct device *dev, struct device_attribute *attr, |
1724 | char *buf) | |
1da177e4 | 1725 | { |
dff59b64 | 1726 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1727 | |
2a2cf6b1 | 1728 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1729 | return sprintf(buf, "%ld\n", priv->conn->prof.doios_multi); |
1730 | } | |
1731 | ||
eebce385 MS |
1732 | static ssize_t mdoio_write (struct device *dev, struct device_attribute *attr, |
1733 | const char *buf, size_t count) | |
1da177e4 | 1734 | { |
dff59b64 | 1735 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
e82b0f2c | 1736 | |
2a2cf6b1 | 1737 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1738 | priv->conn->prof.doios_multi = 0; |
1739 | return count; | |
1740 | } | |
1741 | ||
1742 | static DEVICE_ATTR(tx_multi_write_ops, 0644, mdoio_show, mdoio_write); | |
1743 | ||
eebce385 MS |
1744 | static ssize_t txlen_show (struct device *dev, struct device_attribute *attr, |
1745 | char *buf) | |
1da177e4 | 1746 | { |
dff59b64 | 1747 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1748 | |
2a2cf6b1 | 1749 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1750 | return sprintf(buf, "%ld\n", priv->conn->prof.txlen); |
1751 | } | |
1752 | ||
eebce385 MS |
1753 | static ssize_t txlen_write (struct device *dev, struct device_attribute *attr, |
1754 | const char *buf, size_t count) | |
1da177e4 | 1755 | { |
dff59b64 | 1756 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
e82b0f2c | 1757 | |
2a2cf6b1 | 1758 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1759 | priv->conn->prof.txlen = 0; |
1760 | return count; | |
1761 | } | |
1762 | ||
1763 | static DEVICE_ATTR(netto_bytes, 0644, txlen_show, txlen_write); | |
1764 | ||
eebce385 MS |
1765 | static ssize_t txtime_show (struct device *dev, struct device_attribute *attr, |
1766 | char *buf) | |
1da177e4 | 1767 | { |
dff59b64 | 1768 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1769 | |
2a2cf6b1 | 1770 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1771 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_time); |
1772 | } | |
1773 | ||
eebce385 MS |
1774 | static ssize_t txtime_write (struct device *dev, struct device_attribute *attr, |
1775 | const char *buf, size_t count) | |
1da177e4 | 1776 | { |
dff59b64 | 1777 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
e82b0f2c | 1778 | |
2a2cf6b1 | 1779 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1780 | priv->conn->prof.tx_time = 0; |
1781 | return count; | |
1782 | } | |
1783 | ||
1784 | static DEVICE_ATTR(max_tx_io_time, 0644, txtime_show, txtime_write); | |
1785 | ||
eebce385 MS |
1786 | static ssize_t txpend_show (struct device *dev, struct device_attribute *attr, |
1787 | char *buf) | |
1da177e4 | 1788 | { |
dff59b64 | 1789 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1790 | |
2a2cf6b1 | 1791 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1792 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_pending); |
1793 | } | |
1794 | ||
eebce385 MS |
1795 | static ssize_t txpend_write (struct device *dev, struct device_attribute *attr, |
1796 | const char *buf, size_t count) | |
1da177e4 | 1797 | { |
dff59b64 | 1798 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1799 | |
2a2cf6b1 | 1800 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1801 | priv->conn->prof.tx_pending = 0; |
1802 | return count; | |
1803 | } | |
1804 | ||
1805 | static DEVICE_ATTR(tx_pending, 0644, txpend_show, txpend_write); | |
1806 | ||
eebce385 MS |
1807 | static ssize_t txmpnd_show (struct device *dev, struct device_attribute *attr, |
1808 | char *buf) | |
1da177e4 | 1809 | { |
dff59b64 | 1810 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1811 | |
2a2cf6b1 | 1812 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1813 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_max_pending); |
1814 | } | |
1815 | ||
eebce385 MS |
1816 | static ssize_t txmpnd_write (struct device *dev, struct device_attribute *attr, |
1817 | const char *buf, size_t count) | |
1da177e4 | 1818 | { |
dff59b64 | 1819 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1820 | |
2a2cf6b1 | 1821 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1822 | priv->conn->prof.tx_max_pending = 0; |
1823 | return count; | |
1824 | } | |
1825 | ||
1826 | static DEVICE_ATTR(tx_max_pending, 0644, txmpnd_show, txmpnd_write); | |
1827 | ||
1828 | static struct attribute *netiucv_attrs[] = { | |
1829 | &dev_attr_buffer.attr, | |
1830 | &dev_attr_user.attr, | |
1831 | NULL, | |
1832 | }; | |
1833 | ||
1834 | static struct attribute_group netiucv_attr_group = { | |
1835 | .attrs = netiucv_attrs, | |
1836 | }; | |
1837 | ||
1838 | static struct attribute *netiucv_stat_attrs[] = { | |
1839 | &dev_attr_device_fsm_state.attr, | |
1840 | &dev_attr_connection_fsm_state.attr, | |
1841 | &dev_attr_max_tx_buffer_used.attr, | |
1842 | &dev_attr_max_chained_skbs.attr, | |
1843 | &dev_attr_tx_single_write_ops.attr, | |
1844 | &dev_attr_tx_multi_write_ops.attr, | |
1845 | &dev_attr_netto_bytes.attr, | |
1846 | &dev_attr_max_tx_io_time.attr, | |
1847 | &dev_attr_tx_pending.attr, | |
1848 | &dev_attr_tx_max_pending.attr, | |
1849 | NULL, | |
1850 | }; | |
1851 | ||
1852 | static struct attribute_group netiucv_stat_attr_group = { | |
1853 | .name = "stats", | |
1854 | .attrs = netiucv_stat_attrs, | |
1855 | }; | |
1856 | ||
0b945293 | 1857 | static const struct attribute_group *netiucv_attr_groups[] = { |
1858 | &netiucv_stat_attr_group, | |
1859 | &netiucv_attr_group, | |
1860 | NULL, | |
1861 | }; | |
1da177e4 | 1862 | |
eebce385 | 1863 | static int netiucv_register_device(struct net_device *ndev) |
1da177e4 | 1864 | { |
eebce385 | 1865 | struct netiucv_priv *priv = netdev_priv(ndev); |
88abaab4 | 1866 | struct device *dev = kzalloc(sizeof(struct device), GFP_KERNEL); |
1da177e4 LT |
1867 | int ret; |
1868 | ||
2a2cf6b1 | 1869 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1870 | |
1871 | if (dev) { | |
1bf5b285 | 1872 | dev_set_name(dev, "net%s", ndev->name); |
1da177e4 LT |
1873 | dev->bus = &iucv_bus; |
1874 | dev->parent = iucv_root; | |
0b945293 | 1875 | dev->groups = netiucv_attr_groups; |
1da177e4 LT |
1876 | /* |
1877 | * The release function could be called after the | |
1878 | * module has been unloaded. It's _only_ task is to | |
1879 | * free the struct. Therefore, we specify kfree() | |
1880 | * directly here. (Probably a little bit obfuscating | |
1881 | * but legitime ...). | |
1882 | */ | |
1883 | dev->release = (void (*)(struct device *))kfree; | |
1884 | dev->driver = &netiucv_driver; | |
1885 | } else | |
1886 | return -ENOMEM; | |
1887 | ||
1888 | ret = device_register(dev); | |
c6304933 SO |
1889 | if (ret) { |
1890 | put_device(dev); | |
1da177e4 | 1891 | return ret; |
c6304933 | 1892 | } |
1da177e4 | 1893 | priv->dev = dev; |
dff59b64 | 1894 | dev_set_drvdata(dev, priv); |
1da177e4 | 1895 | return 0; |
1da177e4 LT |
1896 | } |
1897 | ||
eebce385 | 1898 | static void netiucv_unregister_device(struct device *dev) |
1da177e4 | 1899 | { |
2a2cf6b1 | 1900 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1901 | device_unregister(dev); |
1902 | } | |
1903 | ||
1904 | /** | |
1905 | * Allocate and initialize a new connection structure. | |
1906 | * Add it to the list of netiucv connections; | |
1907 | */ | |
eebce385 | 1908 | static struct iucv_connection *netiucv_new_connection(struct net_device *dev, |
08e3356c UB |
1909 | char *username, |
1910 | char *userdata) | |
eebce385 MS |
1911 | { |
1912 | struct iucv_connection *conn; | |
1da177e4 | 1913 | |
eebce385 MS |
1914 | conn = kzalloc(sizeof(*conn), GFP_KERNEL); |
1915 | if (!conn) | |
1916 | goto out; | |
1917 | skb_queue_head_init(&conn->collect_queue); | |
1918 | skb_queue_head_init(&conn->commit_queue); | |
1919 | spin_lock_init(&conn->collect_lock); | |
1920 | conn->max_buffsize = NETIUCV_BUFSIZE_DEFAULT; | |
1921 | conn->netdev = dev; | |
1922 | ||
1923 | conn->rx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA); | |
1924 | if (!conn->rx_buff) | |
1925 | goto out_conn; | |
1926 | conn->tx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA); | |
1927 | if (!conn->tx_buff) | |
1928 | goto out_rx; | |
1929 | conn->fsm = init_fsm("netiucvconn", conn_state_names, | |
1930 | conn_event_names, NR_CONN_STATES, | |
1931 | NR_CONN_EVENTS, conn_fsm, CONN_FSM_LEN, | |
1932 | GFP_KERNEL); | |
1933 | if (!conn->fsm) | |
1934 | goto out_tx; | |
1935 | ||
1936 | fsm_settimer(conn->fsm, &conn->timer); | |
1937 | fsm_newstate(conn->fsm, CONN_STATE_INVALID); | |
1938 | ||
08e3356c UB |
1939 | if (userdata) |
1940 | memcpy(conn->userdata, userdata, 17); | |
eebce385 MS |
1941 | if (username) { |
1942 | memcpy(conn->userid, username, 9); | |
1943 | fsm_newstate(conn->fsm, CONN_STATE_STOPPED); | |
1da177e4 | 1944 | } |
eebce385 MS |
1945 | |
1946 | write_lock_bh(&iucv_connection_rwlock); | |
1947 | list_add_tail(&conn->list, &iucv_connection_list); | |
1948 | write_unlock_bh(&iucv_connection_rwlock); | |
1da177e4 | 1949 | return conn; |
eebce385 MS |
1950 | |
1951 | out_tx: | |
1952 | kfree_skb(conn->tx_buff); | |
1953 | out_rx: | |
1954 | kfree_skb(conn->rx_buff); | |
1955 | out_conn: | |
1956 | kfree(conn); | |
1957 | out: | |
1958 | return NULL; | |
1da177e4 LT |
1959 | } |
1960 | ||
1961 | /** | |
1962 | * Release a connection structure and remove it from the | |
1963 | * list of netiucv connections. | |
1964 | */ | |
eebce385 | 1965 | static void netiucv_remove_connection(struct iucv_connection *conn) |
1da177e4 | 1966 | { |
08e3356c | 1967 | |
2a2cf6b1 | 1968 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 MS |
1969 | write_lock_bh(&iucv_connection_rwlock); |
1970 | list_del_init(&conn->list); | |
1971 | write_unlock_bh(&iucv_connection_rwlock); | |
0be4acec UB |
1972 | fsm_deltimer(&conn->timer); |
1973 | netiucv_purge_skb_queue(&conn->collect_queue); | |
eebce385 | 1974 | if (conn->path) { |
08e3356c | 1975 | iucv_path_sever(conn->path, conn->userdata); |
eebce385 MS |
1976 | kfree(conn->path); |
1977 | conn->path = NULL; | |
1da177e4 | 1978 | } |
0be4acec | 1979 | netiucv_purge_skb_queue(&conn->commit_queue); |
eebce385 MS |
1980 | kfree_fsm(conn->fsm); |
1981 | kfree_skb(conn->rx_buff); | |
1982 | kfree_skb(conn->tx_buff); | |
1da177e4 LT |
1983 | } |
1984 | ||
1985 | /** | |
1986 | * Release everything of a net device. | |
1987 | */ | |
eebce385 | 1988 | static void netiucv_free_netdevice(struct net_device *dev) |
1da177e4 | 1989 | { |
eebce385 | 1990 | struct netiucv_priv *privptr = netdev_priv(dev); |
1da177e4 | 1991 | |
2a2cf6b1 | 1992 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1993 | |
1994 | if (!dev) | |
1995 | return; | |
1996 | ||
1da177e4 LT |
1997 | if (privptr) { |
1998 | if (privptr->conn) | |
1999 | netiucv_remove_connection(privptr->conn); | |
2000 | if (privptr->fsm) | |
2001 | kfree_fsm(privptr->fsm); | |
2002 | privptr->conn = NULL; privptr->fsm = NULL; | |
2003 | /* privptr gets freed by free_netdev() */ | |
2004 | } | |
2005 | free_netdev(dev); | |
2006 | } | |
2007 | ||
2008 | /** | |
2009 | * Initialize a net device. (Called from kernel in alloc_netdev()) | |
2010 | */ | |
4edd73b5 FB |
2011 | static const struct net_device_ops netiucv_netdev_ops = { |
2012 | .ndo_open = netiucv_open, | |
2013 | .ndo_stop = netiucv_close, | |
2014 | .ndo_get_stats = netiucv_stats, | |
2015 | .ndo_start_xmit = netiucv_tx, | |
2016 | .ndo_change_mtu = netiucv_change_mtu, | |
2017 | }; | |
2018 | ||
eebce385 | 2019 | static void netiucv_setup_netdevice(struct net_device *dev) |
1da177e4 | 2020 | { |
1da177e4 | 2021 | dev->mtu = NETIUCV_MTU_DEFAULT; |
1da177e4 LT |
2022 | dev->destructor = netiucv_free_netdevice; |
2023 | dev->hard_header_len = NETIUCV_HDRLEN; | |
2024 | dev->addr_len = 0; | |
2025 | dev->type = ARPHRD_SLIP; | |
2026 | dev->tx_queue_len = NETIUCV_QUEUELEN_DEFAULT; | |
2027 | dev->flags = IFF_POINTOPOINT | IFF_NOARP; | |
4edd73b5 | 2028 | dev->netdev_ops = &netiucv_netdev_ops; |
1da177e4 LT |
2029 | } |
2030 | ||
2031 | /** | |
2032 | * Allocate and initialize everything of a net device. | |
2033 | */ | |
08e3356c | 2034 | static struct net_device *netiucv_init_netdevice(char *username, char *userdata) |
1da177e4 LT |
2035 | { |
2036 | struct netiucv_priv *privptr; | |
2037 | struct net_device *dev; | |
2038 | ||
2039 | dev = alloc_netdev(sizeof(struct netiucv_priv), "iucv%d", | |
2040 | netiucv_setup_netdevice); | |
2041 | if (!dev) | |
2042 | return NULL; | |
aaf9522d | 2043 | rtnl_lock(); |
1d503563 UB |
2044 | if (dev_alloc_name(dev, dev->name) < 0) |
2045 | goto out_netdev; | |
1da177e4 | 2046 | |
eebce385 | 2047 | privptr = netdev_priv(dev); |
1da177e4 LT |
2048 | privptr->fsm = init_fsm("netiucvdev", dev_state_names, |
2049 | dev_event_names, NR_DEV_STATES, NR_DEV_EVENTS, | |
2050 | dev_fsm, DEV_FSM_LEN, GFP_KERNEL); | |
eebce385 MS |
2051 | if (!privptr->fsm) |
2052 | goto out_netdev; | |
2053 | ||
08e3356c | 2054 | privptr->conn = netiucv_new_connection(dev, username, userdata); |
1da177e4 | 2055 | if (!privptr->conn) { |
1da177e4 | 2056 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_new_connection\n"); |
eebce385 | 2057 | goto out_fsm; |
1da177e4 LT |
2058 | } |
2059 | fsm_newstate(privptr->fsm, DEV_STATE_STOPPED); | |
1da177e4 | 2060 | return dev; |
eebce385 MS |
2061 | |
2062 | out_fsm: | |
2063 | kfree_fsm(privptr->fsm); | |
2064 | out_netdev: | |
aaf9522d | 2065 | rtnl_unlock(); |
eebce385 MS |
2066 | free_netdev(dev); |
2067 | return NULL; | |
1da177e4 LT |
2068 | } |
2069 | ||
eebce385 MS |
2070 | static ssize_t conn_write(struct device_driver *drv, |
2071 | const char *buf, size_t count) | |
1da177e4 | 2072 | { |
16a83b30 | 2073 | char username[9]; |
08e3356c UB |
2074 | char userdata[17]; |
2075 | int rc; | |
1da177e4 | 2076 | struct net_device *dev; |
eebce385 MS |
2077 | struct netiucv_priv *priv; |
2078 | struct iucv_connection *cp; | |
1da177e4 | 2079 | |
2a2cf6b1 | 2080 | IUCV_DBF_TEXT(trace, 3, __func__); |
08e3356c UB |
2081 | rc = netiucv_check_user(buf, count, username, userdata); |
2082 | if (rc) | |
2083 | return rc; | |
16a83b30 | 2084 | |
eebce385 MS |
2085 | read_lock_bh(&iucv_connection_rwlock); |
2086 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
08e3356c UB |
2087 | if (!strncmp(username, cp->userid, 9) && |
2088 | !strncmp(userdata, cp->userdata, 17)) { | |
eebce385 | 2089 | read_unlock_bh(&iucv_connection_rwlock); |
08e3356c UB |
2090 | IUCV_DBF_TEXT_(setup, 2, "conn_write: Connection to %s " |
2091 | "already exists\n", netiucv_printuser(cp)); | |
eebce385 MS |
2092 | return -EEXIST; |
2093 | } | |
16a83b30 | 2094 | } |
eebce385 MS |
2095 | read_unlock_bh(&iucv_connection_rwlock); |
2096 | ||
08e3356c | 2097 | dev = netiucv_init_netdevice(username, userdata); |
1da177e4 | 2098 | if (!dev) { |
1da177e4 LT |
2099 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_init_netdevice\n"); |
2100 | return -ENODEV; | |
2101 | } | |
2102 | ||
eebce385 MS |
2103 | rc = netiucv_register_device(dev); |
2104 | if (rc) { | |
aaf9522d | 2105 | rtnl_unlock(); |
1da177e4 | 2106 | IUCV_DBF_TEXT_(setup, 2, |
eebce385 | 2107 | "ret %d from netiucv_register_device\n", rc); |
1da177e4 LT |
2108 | goto out_free_ndev; |
2109 | } | |
2110 | ||
2111 | /* sysfs magic */ | |
eebce385 MS |
2112 | priv = netdev_priv(dev); |
2113 | SET_NETDEV_DEV(dev, priv->dev); | |
1da177e4 | 2114 | |
aaf9522d BP |
2115 | rc = register_netdevice(dev); |
2116 | rtnl_unlock(); | |
eebce385 MS |
2117 | if (rc) |
2118 | goto out_unreg; | |
1da177e4 | 2119 | |
08e3356c UB |
2120 | dev_info(priv->dev, "The IUCV interface to %s has been established " |
2121 | "successfully\n", | |
2122 | netiucv_printuser(priv->conn)); | |
e82b0f2c | 2123 | |
1da177e4 LT |
2124 | return count; |
2125 | ||
eebce385 MS |
2126 | out_unreg: |
2127 | netiucv_unregister_device(priv->dev); | |
1da177e4 | 2128 | out_free_ndev: |
1da177e4 | 2129 | netiucv_free_netdevice(dev); |
eebce385 | 2130 | return rc; |
1da177e4 LT |
2131 | } |
2132 | ||
2b67fc46 | 2133 | static DRIVER_ATTR(connection, 0200, NULL, conn_write); |
1da177e4 | 2134 | |
eebce385 MS |
2135 | static ssize_t remove_write (struct device_driver *drv, |
2136 | const char *buf, size_t count) | |
1da177e4 | 2137 | { |
eebce385 | 2138 | struct iucv_connection *cp; |
1da177e4 LT |
2139 | struct net_device *ndev; |
2140 | struct netiucv_priv *priv; | |
2141 | struct device *dev; | |
2142 | char name[IFNAMSIZ]; | |
eebce385 | 2143 | const char *p; |
1da177e4 LT |
2144 | int i; |
2145 | ||
2a2cf6b1 | 2146 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
2147 | |
2148 | if (count >= IFNAMSIZ) | |
a419aef8 | 2149 | count = IFNAMSIZ - 1; |
1da177e4 | 2150 | |
eebce385 MS |
2151 | for (i = 0, p = buf; i < count && *p; i++, p++) { |
2152 | if (*p == '\n' || *p == ' ') | |
1da177e4 LT |
2153 | /* trailing lf, grr */ |
2154 | break; | |
eebce385 | 2155 | name[i] = *p; |
1da177e4 LT |
2156 | } |
2157 | name[i] = '\0'; | |
2158 | ||
eebce385 MS |
2159 | read_lock_bh(&iucv_connection_rwlock); |
2160 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
2161 | ndev = cp->netdev; | |
2162 | priv = netdev_priv(ndev); | |
1da177e4 | 2163 | dev = priv->dev; |
eebce385 MS |
2164 | if (strncmp(name, ndev->name, count)) |
2165 | continue; | |
2166 | read_unlock_bh(&iucv_connection_rwlock); | |
1da177e4 | 2167 | if (ndev->flags & (IFF_UP | IFF_RUNNING)) { |
8f7c502c UB |
2168 | dev_warn(dev, "The IUCV device is connected" |
2169 | " to %s and cannot be removed\n", | |
2170 | priv->conn->userid); | |
1da177e4 | 2171 | IUCV_DBF_TEXT(data, 2, "remove_write: still active\n"); |
f082bcae | 2172 | return -EPERM; |
1da177e4 LT |
2173 | } |
2174 | unregister_netdev(ndev); | |
2175 | netiucv_unregister_device(dev); | |
2176 | return count; | |
2177 | } | |
eebce385 | 2178 | read_unlock_bh(&iucv_connection_rwlock); |
1da177e4 LT |
2179 | IUCV_DBF_TEXT(data, 2, "remove_write: unknown device\n"); |
2180 | return -EINVAL; | |
2181 | } | |
2182 | ||
2b67fc46 | 2183 | static DRIVER_ATTR(remove, 0200, NULL, remove_write); |
1da177e4 | 2184 | |
eebce385 MS |
2185 | static struct attribute * netiucv_drv_attrs[] = { |
2186 | &driver_attr_connection.attr, | |
2187 | &driver_attr_remove.attr, | |
2188 | NULL, | |
2189 | }; | |
2190 | ||
2191 | static struct attribute_group netiucv_drv_attr_group = { | |
2192 | .attrs = netiucv_drv_attrs, | |
2193 | }; | |
2194 | ||
a4dbd674 | 2195 | static const struct attribute_group *netiucv_drv_attr_groups[] = { |
5b88feb1 CH |
2196 | &netiucv_drv_attr_group, |
2197 | NULL, | |
2198 | }; | |
2199 | ||
eebce385 | 2200 | static void netiucv_banner(void) |
1da177e4 | 2201 | { |
8f7c502c | 2202 | pr_info("driver initialized\n"); |
1da177e4 LT |
2203 | } |
2204 | ||
eebce385 | 2205 | static void __exit netiucv_exit(void) |
1da177e4 | 2206 | { |
eebce385 MS |
2207 | struct iucv_connection *cp; |
2208 | struct net_device *ndev; | |
2209 | struct netiucv_priv *priv; | |
2210 | struct device *dev; | |
2211 | ||
2a2cf6b1 | 2212 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 MS |
2213 | while (!list_empty(&iucv_connection_list)) { |
2214 | cp = list_entry(iucv_connection_list.next, | |
2215 | struct iucv_connection, list); | |
eebce385 MS |
2216 | ndev = cp->netdev; |
2217 | priv = netdev_priv(ndev); | |
2218 | dev = priv->dev; | |
1da177e4 LT |
2219 | |
2220 | unregister_netdev(ndev); | |
2221 | netiucv_unregister_device(dev); | |
2222 | } | |
2223 | ||
1175b257 | 2224 | device_unregister(netiucv_dev); |
1da177e4 | 2225 | driver_unregister(&netiucv_driver); |
eebce385 | 2226 | iucv_unregister(&netiucv_handler, 1); |
1da177e4 LT |
2227 | iucv_unregister_dbf_views(); |
2228 | ||
8f7c502c | 2229 | pr_info("driver unloaded\n"); |
1da177e4 LT |
2230 | return; |
2231 | } | |
2232 | ||
eebce385 | 2233 | static int __init netiucv_init(void) |
1da177e4 | 2234 | { |
eebce385 | 2235 | int rc; |
e82b0f2c | 2236 | |
eebce385 MS |
2237 | rc = iucv_register_dbf_views(); |
2238 | if (rc) | |
2239 | goto out; | |
2240 | rc = iucv_register(&netiucv_handler, 1); | |
2241 | if (rc) | |
2242 | goto out_dbf; | |
2a2cf6b1 | 2243 | IUCV_DBF_TEXT(trace, 3, __func__); |
0a0a8310 | 2244 | netiucv_driver.groups = netiucv_drv_attr_groups; |
eebce385 MS |
2245 | rc = driver_register(&netiucv_driver); |
2246 | if (rc) { | |
eebce385 MS |
2247 | IUCV_DBF_TEXT_(setup, 2, "ret %d from driver_register\n", rc); |
2248 | goto out_iucv; | |
1da177e4 | 2249 | } |
1175b257 UB |
2250 | /* establish dummy device */ |
2251 | netiucv_dev = kzalloc(sizeof(struct device), GFP_KERNEL); | |
2252 | if (!netiucv_dev) { | |
2253 | rc = -ENOMEM; | |
2254 | goto out_driver; | |
2255 | } | |
2256 | dev_set_name(netiucv_dev, "netiucv"); | |
2257 | netiucv_dev->bus = &iucv_bus; | |
2258 | netiucv_dev->parent = iucv_root; | |
2259 | netiucv_dev->release = (void (*)(struct device *))kfree; | |
2260 | netiucv_dev->driver = &netiucv_driver; | |
2261 | rc = device_register(netiucv_dev); | |
c6304933 SO |
2262 | if (rc) { |
2263 | put_device(netiucv_dev); | |
1175b257 | 2264 | goto out_driver; |
c6304933 | 2265 | } |
eebce385 MS |
2266 | netiucv_banner(); |
2267 | return rc; | |
2268 | ||
1175b257 UB |
2269 | out_driver: |
2270 | driver_unregister(&netiucv_driver); | |
eebce385 MS |
2271 | out_iucv: |
2272 | iucv_unregister(&netiucv_handler, 1); | |
2273 | out_dbf: | |
2274 | iucv_unregister_dbf_views(); | |
2275 | out: | |
2276 | return rc; | |
1da177e4 | 2277 | } |
e82b0f2c | 2278 | |
1da177e4 LT |
2279 | module_init(netiucv_init); |
2280 | module_exit(netiucv_exit); | |
2281 | MODULE_LICENSE("GPL"); |