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ab9953ff | 1 | // SPDX-License-Identifier: GPL-2.0+ |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * IUCV network driver |
4 | * | |
1175b257 | 5 | * Copyright IBM Corp. 2001, 2009 |
1da177e4 | 6 | * |
1175b257 UB |
7 | * Author(s): |
8 | * Original netiucv driver: | |
9 | * Fritz Elfert (elfert@de.ibm.com, felfert@millenux.com) | |
10 | * Sysfs integration and all bugs therein: | |
11 | * Cornelia Huck (cornelia.huck@de.ibm.com) | |
12 | * PM functions: | |
13 | * Ursula Braun (ursula.braun@de.ibm.com) | |
1da177e4 LT |
14 | * |
15 | * Documentation used: | |
16 | * the source of the original IUCV driver by: | |
17 | * Stefan Hegewald <hegewald@de.ibm.com> | |
18 | * Hartmut Penner <hpenner@de.ibm.com> | |
19 | * Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) | |
20 | * Martin Schwidefsky (schwidefsky@de.ibm.com) | |
21 | * Alan Altmark (Alan_Altmark@us.ibm.com) Sept. 2000 | |
1da177e4 | 22 | */ |
e82b0f2c | 23 | |
8f7c502c UB |
24 | #define KMSG_COMPONENT "netiucv" |
25 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
26 | ||
1da177e4 LT |
27 | #undef DEBUG |
28 | ||
29 | #include <linux/module.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/kernel.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/errno.h> | |
34 | #include <linux/types.h> | |
35 | #include <linux/interrupt.h> | |
36 | #include <linux/timer.h> | |
1da177e4 LT |
37 | #include <linux/bitops.h> |
38 | ||
39 | #include <linux/signal.h> | |
40 | #include <linux/string.h> | |
41 | #include <linux/device.h> | |
42 | ||
43 | #include <linux/ip.h> | |
44 | #include <linux/if_arp.h> | |
45 | #include <linux/tcp.h> | |
46 | #include <linux/skbuff.h> | |
47 | #include <linux/ctype.h> | |
48 | #include <net/dst.h> | |
49 | ||
50 | #include <asm/io.h> | |
7c0f6ba6 | 51 | #include <linux/uaccess.h> |
08e3356c | 52 | #include <asm/ebcdic.h> |
1da177e4 | 53 | |
eebce385 | 54 | #include <net/iucv/iucv.h> |
1da177e4 LT |
55 | #include "fsm.h" |
56 | ||
57 | MODULE_AUTHOR | |
58 | ("(C) 2001 IBM Corporation by Fritz Elfert (felfert@millenux.com)"); | |
59 | MODULE_DESCRIPTION ("Linux for S/390 IUCV network driver"); | |
60 | ||
eebce385 MS |
61 | /** |
62 | * Debug Facility stuff | |
63 | */ | |
64 | #define IUCV_DBF_SETUP_NAME "iucv_setup" | |
08e3356c | 65 | #define IUCV_DBF_SETUP_LEN 64 |
eebce385 MS |
66 | #define IUCV_DBF_SETUP_PAGES 2 |
67 | #define IUCV_DBF_SETUP_NR_AREAS 1 | |
68 | #define IUCV_DBF_SETUP_LEVEL 3 | |
69 | ||
70 | #define IUCV_DBF_DATA_NAME "iucv_data" | |
71 | #define IUCV_DBF_DATA_LEN 128 | |
72 | #define IUCV_DBF_DATA_PAGES 2 | |
73 | #define IUCV_DBF_DATA_NR_AREAS 1 | |
74 | #define IUCV_DBF_DATA_LEVEL 2 | |
75 | ||
76 | #define IUCV_DBF_TRACE_NAME "iucv_trace" | |
77 | #define IUCV_DBF_TRACE_LEN 16 | |
78 | #define IUCV_DBF_TRACE_PAGES 4 | |
79 | #define IUCV_DBF_TRACE_NR_AREAS 1 | |
80 | #define IUCV_DBF_TRACE_LEVEL 3 | |
81 | ||
82 | #define IUCV_DBF_TEXT(name,level,text) \ | |
83 | do { \ | |
84 | debug_text_event(iucv_dbf_##name,level,text); \ | |
85 | } while (0) | |
86 | ||
87 | #define IUCV_DBF_HEX(name,level,addr,len) \ | |
88 | do { \ | |
89 | debug_event(iucv_dbf_##name,level,(void*)(addr),len); \ | |
90 | } while (0) | |
91 | ||
92 | DECLARE_PER_CPU(char[256], iucv_dbf_txt_buf); | |
93 | ||
f33780d3 PT |
94 | #define IUCV_DBF_TEXT_(name, level, text...) \ |
95 | do { \ | |
8e6a8285 | 96 | if (debug_level_enabled(iucv_dbf_##name, level)) { \ |
390dfd95 TH |
97 | char* __buf = get_cpu_var(iucv_dbf_txt_buf); \ |
98 | sprintf(__buf, text); \ | |
99 | debug_text_event(iucv_dbf_##name, level, __buf); \ | |
f33780d3 PT |
100 | put_cpu_var(iucv_dbf_txt_buf); \ |
101 | } \ | |
eebce385 MS |
102 | } while (0) |
103 | ||
104 | #define IUCV_DBF_SPRINTF(name,level,text...) \ | |
105 | do { \ | |
106 | debug_sprintf_event(iucv_dbf_trace, level, ##text ); \ | |
107 | debug_sprintf_event(iucv_dbf_trace, level, text ); \ | |
108 | } while (0) | |
109 | ||
110 | /** | |
111 | * some more debug stuff | |
112 | */ | |
1da177e4 LT |
113 | #define PRINTK_HEADER " iucv: " /* for debugging */ |
114 | ||
115 | static struct device_driver netiucv_driver = { | |
2219510f | 116 | .owner = THIS_MODULE, |
1da177e4 LT |
117 | .name = "netiucv", |
118 | .bus = &iucv_bus, | |
119 | }; | |
120 | ||
91e60eb6 UB |
121 | static int netiucv_callback_connreq(struct iucv_path *, u8 *, u8 *); |
122 | static void netiucv_callback_connack(struct iucv_path *, u8 *); | |
123 | static void netiucv_callback_connrej(struct iucv_path *, u8 *); | |
124 | static void netiucv_callback_connsusp(struct iucv_path *, u8 *); | |
125 | static void netiucv_callback_connres(struct iucv_path *, u8 *); | |
eebce385 MS |
126 | static void netiucv_callback_rx(struct iucv_path *, struct iucv_message *); |
127 | static void netiucv_callback_txdone(struct iucv_path *, struct iucv_message *); | |
128 | ||
129 | static struct iucv_handler netiucv_handler = { | |
130 | .path_pending = netiucv_callback_connreq, | |
131 | .path_complete = netiucv_callback_connack, | |
132 | .path_severed = netiucv_callback_connrej, | |
133 | .path_quiesced = netiucv_callback_connsusp, | |
134 | .path_resumed = netiucv_callback_connres, | |
135 | .message_pending = netiucv_callback_rx, | |
136 | .message_complete = netiucv_callback_txdone | |
137 | }; | |
138 | ||
1da177e4 LT |
139 | /** |
140 | * Per connection profiling data | |
141 | */ | |
142 | struct connection_profile { | |
143 | unsigned long maxmulti; | |
144 | unsigned long maxcqueue; | |
145 | unsigned long doios_single; | |
146 | unsigned long doios_multi; | |
147 | unsigned long txlen; | |
148 | unsigned long tx_time; | |
ee6edb97 | 149 | unsigned long send_stamp; |
1da177e4 LT |
150 | unsigned long tx_pending; |
151 | unsigned long tx_max_pending; | |
152 | }; | |
153 | ||
154 | /** | |
155 | * Representation of one iucv connection | |
156 | */ | |
157 | struct iucv_connection { | |
eebce385 MS |
158 | struct list_head list; |
159 | struct iucv_path *path; | |
1da177e4 LT |
160 | struct sk_buff *rx_buff; |
161 | struct sk_buff *tx_buff; | |
162 | struct sk_buff_head collect_queue; | |
163 | struct sk_buff_head commit_queue; | |
164 | spinlock_t collect_lock; | |
165 | int collect_len; | |
166 | int max_buffsize; | |
167 | fsm_timer timer; | |
168 | fsm_instance *fsm; | |
169 | struct net_device *netdev; | |
170 | struct connection_profile prof; | |
171 | char userid[9]; | |
08e3356c | 172 | char userdata[17]; |
1da177e4 LT |
173 | }; |
174 | ||
175 | /** | |
176 | * Linked list of all connection structs. | |
177 | */ | |
c11ca97e | 178 | static LIST_HEAD(iucv_connection_list); |
bfac0d0b | 179 | static DEFINE_RWLOCK(iucv_connection_rwlock); |
1da177e4 LT |
180 | |
181 | /** | |
182 | * Representation of event-data for the | |
183 | * connection state machine. | |
184 | */ | |
185 | struct iucv_event { | |
186 | struct iucv_connection *conn; | |
187 | void *data; | |
188 | }; | |
189 | ||
190 | /** | |
191 | * Private part of the network device structure | |
192 | */ | |
193 | struct netiucv_priv { | |
194 | struct net_device_stats stats; | |
195 | unsigned long tbusy; | |
196 | fsm_instance *fsm; | |
197 | struct iucv_connection *conn; | |
198 | struct device *dev; | |
199 | }; | |
200 | ||
201 | /** | |
202 | * Link level header for a packet. | |
203 | */ | |
eebce385 MS |
204 | struct ll_header { |
205 | u16 next; | |
206 | }; | |
1da177e4 | 207 | |
eebce385 | 208 | #define NETIUCV_HDRLEN (sizeof(struct ll_header)) |
08e3356c | 209 | #define NETIUCV_BUFSIZE_MAX 65537 |
1da177e4 LT |
210 | #define NETIUCV_BUFSIZE_DEFAULT NETIUCV_BUFSIZE_MAX |
211 | #define NETIUCV_MTU_MAX (NETIUCV_BUFSIZE_MAX - NETIUCV_HDRLEN) | |
212 | #define NETIUCV_MTU_DEFAULT 9216 | |
213 | #define NETIUCV_QUEUELEN_DEFAULT 50 | |
214 | #define NETIUCV_TIMEOUT_5SEC 5000 | |
215 | ||
216 | /** | |
217 | * Compatibility macros for busy handling | |
218 | * of network devices. | |
219 | */ | |
cef6ff22 | 220 | static void netiucv_clear_busy(struct net_device *dev) |
1da177e4 | 221 | { |
eebce385 MS |
222 | struct netiucv_priv *priv = netdev_priv(dev); |
223 | clear_bit(0, &priv->tbusy); | |
1da177e4 LT |
224 | netif_wake_queue(dev); |
225 | } | |
226 | ||
cef6ff22 | 227 | static int netiucv_test_and_set_busy(struct net_device *dev) |
1da177e4 | 228 | { |
eebce385 | 229 | struct netiucv_priv *priv = netdev_priv(dev); |
1da177e4 | 230 | netif_stop_queue(dev); |
eebce385 | 231 | return test_and_set_bit(0, &priv->tbusy); |
1da177e4 LT |
232 | } |
233 | ||
08e3356c UB |
234 | static u8 iucvMagic_ascii[16] = { |
235 | 0x30, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, | |
236 | 0x30, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20 | |
237 | }; | |
238 | ||
239 | static u8 iucvMagic_ebcdic[16] = { | |
1da177e4 LT |
240 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, |
241 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40 | |
242 | }; | |
243 | ||
1da177e4 LT |
244 | /** |
245 | * Convert an iucv userId to its printable | |
246 | * form (strip whitespace at end). | |
247 | * | |
248 | * @param An iucv userId | |
249 | * | |
250 | * @returns The printable string (static data!!) | |
251 | */ | |
08e3356c | 252 | static char *netiucv_printname(char *name, int len) |
1da177e4 | 253 | { |
08e3356c | 254 | static char tmp[17]; |
1da177e4 | 255 | char *p = tmp; |
08e3356c UB |
256 | memcpy(tmp, name, len); |
257 | tmp[len] = '\0'; | |
258 | while (*p && ((p - tmp) < len) && (!isspace(*p))) | |
1da177e4 LT |
259 | p++; |
260 | *p = '\0'; | |
261 | return tmp; | |
262 | } | |
e82b0f2c | 263 | |
08e3356c UB |
264 | static char *netiucv_printuser(struct iucv_connection *conn) |
265 | { | |
266 | static char tmp_uid[9]; | |
267 | static char tmp_udat[17]; | |
268 | static char buf[100]; | |
269 | ||
270 | if (memcmp(conn->userdata, iucvMagic_ebcdic, 16)) { | |
271 | tmp_uid[8] = '\0'; | |
272 | tmp_udat[16] = '\0'; | |
baac7898 | 273 | memcpy(tmp_uid, netiucv_printname(conn->userid, 8), 8); |
08e3356c UB |
274 | memcpy(tmp_udat, conn->userdata, 16); |
275 | EBCASC(tmp_udat, 16); | |
276 | memcpy(tmp_udat, netiucv_printname(tmp_udat, 16), 16); | |
277 | sprintf(buf, "%s.%s", tmp_uid, tmp_udat); | |
278 | return buf; | |
279 | } else | |
280 | return netiucv_printname(conn->userid, 8); | |
281 | } | |
282 | ||
1da177e4 LT |
283 | /** |
284 | * States of the interface statemachine. | |
285 | */ | |
286 | enum dev_states { | |
287 | DEV_STATE_STOPPED, | |
288 | DEV_STATE_STARTWAIT, | |
289 | DEV_STATE_STOPWAIT, | |
290 | DEV_STATE_RUNNING, | |
291 | /** | |
292 | * MUST be always the last element!! | |
293 | */ | |
294 | NR_DEV_STATES | |
295 | }; | |
296 | ||
297 | static const char *dev_state_names[] = { | |
298 | "Stopped", | |
299 | "StartWait", | |
300 | "StopWait", | |
301 | "Running", | |
302 | }; | |
303 | ||
304 | /** | |
305 | * Events of the interface statemachine. | |
306 | */ | |
307 | enum dev_events { | |
308 | DEV_EVENT_START, | |
309 | DEV_EVENT_STOP, | |
310 | DEV_EVENT_CONUP, | |
311 | DEV_EVENT_CONDOWN, | |
312 | /** | |
313 | * MUST be always the last element!! | |
314 | */ | |
315 | NR_DEV_EVENTS | |
316 | }; | |
317 | ||
318 | static const char *dev_event_names[] = { | |
319 | "Start", | |
320 | "Stop", | |
321 | "Connection up", | |
322 | "Connection down", | |
323 | }; | |
e82b0f2c | 324 | |
1da177e4 LT |
325 | /** |
326 | * Events of the connection statemachine | |
327 | */ | |
328 | enum conn_events { | |
329 | /** | |
330 | * Events, representing callbacks from | |
331 | * lowlevel iucv layer) | |
332 | */ | |
333 | CONN_EVENT_CONN_REQ, | |
334 | CONN_EVENT_CONN_ACK, | |
335 | CONN_EVENT_CONN_REJ, | |
336 | CONN_EVENT_CONN_SUS, | |
337 | CONN_EVENT_CONN_RES, | |
338 | CONN_EVENT_RX, | |
339 | CONN_EVENT_TXDONE, | |
340 | ||
341 | /** | |
342 | * Events, representing errors return codes from | |
343 | * calls to lowlevel iucv layer | |
344 | */ | |
345 | ||
346 | /** | |
347 | * Event, representing timer expiry. | |
348 | */ | |
349 | CONN_EVENT_TIMER, | |
350 | ||
351 | /** | |
352 | * Events, representing commands from upper levels. | |
353 | */ | |
354 | CONN_EVENT_START, | |
355 | CONN_EVENT_STOP, | |
356 | ||
357 | /** | |
358 | * MUST be always the last element!! | |
359 | */ | |
360 | NR_CONN_EVENTS, | |
361 | }; | |
362 | ||
363 | static const char *conn_event_names[] = { | |
364 | "Remote connection request", | |
365 | "Remote connection acknowledge", | |
366 | "Remote connection reject", | |
367 | "Connection suspended", | |
368 | "Connection resumed", | |
369 | "Data received", | |
370 | "Data sent", | |
371 | ||
372 | "Timer", | |
373 | ||
374 | "Start", | |
375 | "Stop", | |
376 | }; | |
377 | ||
378 | /** | |
379 | * States of the connection statemachine. | |
380 | */ | |
381 | enum conn_states { | |
382 | /** | |
383 | * Connection not assigned to any device, | |
384 | * initial state, invalid | |
385 | */ | |
386 | CONN_STATE_INVALID, | |
387 | ||
388 | /** | |
389 | * Userid assigned but not operating | |
390 | */ | |
391 | CONN_STATE_STOPPED, | |
392 | ||
393 | /** | |
394 | * Connection registered, | |
395 | * no connection request sent yet, | |
396 | * no connection request received | |
397 | */ | |
398 | CONN_STATE_STARTWAIT, | |
399 | ||
400 | /** | |
401 | * Connection registered and connection request sent, | |
402 | * no acknowledge and no connection request received yet. | |
403 | */ | |
404 | CONN_STATE_SETUPWAIT, | |
405 | ||
406 | /** | |
407 | * Connection up and running idle | |
408 | */ | |
409 | CONN_STATE_IDLE, | |
410 | ||
411 | /** | |
412 | * Data sent, awaiting CONN_EVENT_TXDONE | |
413 | */ | |
414 | CONN_STATE_TX, | |
415 | ||
416 | /** | |
417 | * Error during registration. | |
418 | */ | |
419 | CONN_STATE_REGERR, | |
420 | ||
421 | /** | |
422 | * Error during registration. | |
423 | */ | |
424 | CONN_STATE_CONNERR, | |
425 | ||
426 | /** | |
427 | * MUST be always the last element!! | |
428 | */ | |
429 | NR_CONN_STATES, | |
430 | }; | |
431 | ||
432 | static const char *conn_state_names[] = { | |
433 | "Invalid", | |
434 | "Stopped", | |
435 | "StartWait", | |
436 | "SetupWait", | |
437 | "Idle", | |
438 | "TX", | |
439 | "Terminating", | |
440 | "Registration error", | |
441 | "Connect error", | |
442 | }; | |
443 | ||
e82b0f2c | 444 | |
1da177e4 LT |
445 | /** |
446 | * Debug Facility Stuff | |
447 | */ | |
448 | static debug_info_t *iucv_dbf_setup = NULL; | |
449 | static debug_info_t *iucv_dbf_data = NULL; | |
450 | static debug_info_t *iucv_dbf_trace = NULL; | |
451 | ||
452 | DEFINE_PER_CPU(char[256], iucv_dbf_txt_buf); | |
453 | ||
eebce385 | 454 | static void iucv_unregister_dbf_views(void) |
1da177e4 | 455 | { |
b646c08e ME |
456 | debug_unregister(iucv_dbf_setup); |
457 | debug_unregister(iucv_dbf_data); | |
458 | debug_unregister(iucv_dbf_trace); | |
1da177e4 | 459 | } |
eebce385 | 460 | static int iucv_register_dbf_views(void) |
1da177e4 LT |
461 | { |
462 | iucv_dbf_setup = debug_register(IUCV_DBF_SETUP_NAME, | |
66a464db | 463 | IUCV_DBF_SETUP_PAGES, |
1da177e4 LT |
464 | IUCV_DBF_SETUP_NR_AREAS, |
465 | IUCV_DBF_SETUP_LEN); | |
466 | iucv_dbf_data = debug_register(IUCV_DBF_DATA_NAME, | |
66a464db | 467 | IUCV_DBF_DATA_PAGES, |
1da177e4 LT |
468 | IUCV_DBF_DATA_NR_AREAS, |
469 | IUCV_DBF_DATA_LEN); | |
470 | iucv_dbf_trace = debug_register(IUCV_DBF_TRACE_NAME, | |
66a464db | 471 | IUCV_DBF_TRACE_PAGES, |
1da177e4 LT |
472 | IUCV_DBF_TRACE_NR_AREAS, |
473 | IUCV_DBF_TRACE_LEN); | |
474 | ||
475 | if ((iucv_dbf_setup == NULL) || (iucv_dbf_data == NULL) || | |
476 | (iucv_dbf_trace == NULL)) { | |
477 | iucv_unregister_dbf_views(); | |
478 | return -ENOMEM; | |
479 | } | |
480 | debug_register_view(iucv_dbf_setup, &debug_hex_ascii_view); | |
481 | debug_set_level(iucv_dbf_setup, IUCV_DBF_SETUP_LEVEL); | |
482 | ||
483 | debug_register_view(iucv_dbf_data, &debug_hex_ascii_view); | |
484 | debug_set_level(iucv_dbf_data, IUCV_DBF_DATA_LEVEL); | |
485 | ||
486 | debug_register_view(iucv_dbf_trace, &debug_hex_ascii_view); | |
487 | debug_set_level(iucv_dbf_trace, IUCV_DBF_TRACE_LEVEL); | |
488 | ||
489 | return 0; | |
490 | } | |
491 | ||
eebce385 | 492 | /* |
1da177e4 | 493 | * Callback-wrappers, called from lowlevel iucv layer. |
eebce385 | 494 | */ |
1da177e4 | 495 | |
eebce385 MS |
496 | static void netiucv_callback_rx(struct iucv_path *path, |
497 | struct iucv_message *msg) | |
1da177e4 | 498 | { |
eebce385 | 499 | struct iucv_connection *conn = path->private; |
1da177e4 LT |
500 | struct iucv_event ev; |
501 | ||
502 | ev.conn = conn; | |
eebce385 | 503 | ev.data = msg; |
1da177e4 LT |
504 | fsm_event(conn->fsm, CONN_EVENT_RX, &ev); |
505 | } | |
506 | ||
eebce385 MS |
507 | static void netiucv_callback_txdone(struct iucv_path *path, |
508 | struct iucv_message *msg) | |
1da177e4 | 509 | { |
eebce385 | 510 | struct iucv_connection *conn = path->private; |
1da177e4 LT |
511 | struct iucv_event ev; |
512 | ||
513 | ev.conn = conn; | |
eebce385 | 514 | ev.data = msg; |
1da177e4 LT |
515 | fsm_event(conn->fsm, CONN_EVENT_TXDONE, &ev); |
516 | } | |
517 | ||
eebce385 | 518 | static void netiucv_callback_connack(struct iucv_path *path, u8 ipuser[16]) |
1da177e4 | 519 | { |
eebce385 | 520 | struct iucv_connection *conn = path->private; |
1da177e4 | 521 | |
eebce385 | 522 | fsm_event(conn->fsm, CONN_EVENT_CONN_ACK, conn); |
1da177e4 LT |
523 | } |
524 | ||
91e60eb6 UB |
525 | static int netiucv_callback_connreq(struct iucv_path *path, u8 *ipvmid, |
526 | u8 *ipuser) | |
1da177e4 | 527 | { |
eebce385 | 528 | struct iucv_connection *conn = path->private; |
1da177e4 | 529 | struct iucv_event ev; |
08e3356c UB |
530 | static char tmp_user[9]; |
531 | static char tmp_udat[17]; | |
eebce385 | 532 | int rc; |
1da177e4 | 533 | |
eebce385 | 534 | rc = -EINVAL; |
08e3356c UB |
535 | memcpy(tmp_user, netiucv_printname(ipvmid, 8), 8); |
536 | memcpy(tmp_udat, ipuser, 16); | |
537 | EBCASC(tmp_udat, 16); | |
eebce385 MS |
538 | read_lock_bh(&iucv_connection_rwlock); |
539 | list_for_each_entry(conn, &iucv_connection_list, list) { | |
08e3356c UB |
540 | if (strncmp(ipvmid, conn->userid, 8) || |
541 | strncmp(ipuser, conn->userdata, 16)) | |
eebce385 MS |
542 | continue; |
543 | /* Found a matching connection for this path. */ | |
544 | conn->path = path; | |
545 | ev.conn = conn; | |
546 | ev.data = path; | |
547 | fsm_event(conn->fsm, CONN_EVENT_CONN_REQ, &ev); | |
548 | rc = 0; | |
549 | } | |
08e3356c UB |
550 | IUCV_DBF_TEXT_(setup, 2, "Connection requested for %s.%s\n", |
551 | tmp_user, netiucv_printname(tmp_udat, 16)); | |
eebce385 MS |
552 | read_unlock_bh(&iucv_connection_rwlock); |
553 | return rc; | |
1da177e4 LT |
554 | } |
555 | ||
91e60eb6 | 556 | static void netiucv_callback_connrej(struct iucv_path *path, u8 *ipuser) |
1da177e4 | 557 | { |
eebce385 | 558 | struct iucv_connection *conn = path->private; |
1da177e4 | 559 | |
eebce385 | 560 | fsm_event(conn->fsm, CONN_EVENT_CONN_REJ, conn); |
1da177e4 LT |
561 | } |
562 | ||
91e60eb6 | 563 | static void netiucv_callback_connsusp(struct iucv_path *path, u8 *ipuser) |
1da177e4 | 564 | { |
eebce385 | 565 | struct iucv_connection *conn = path->private; |
1da177e4 | 566 | |
eebce385 | 567 | fsm_event(conn->fsm, CONN_EVENT_CONN_SUS, conn); |
1da177e4 LT |
568 | } |
569 | ||
91e60eb6 | 570 | static void netiucv_callback_connres(struct iucv_path *path, u8 *ipuser) |
1da177e4 | 571 | { |
eebce385 | 572 | struct iucv_connection *conn = path->private; |
1da177e4 | 573 | |
eebce385 MS |
574 | fsm_event(conn->fsm, CONN_EVENT_CONN_RES, conn); |
575 | } | |
1da177e4 LT |
576 | |
577 | /** | |
21b26f2f | 578 | * NOP action for statemachines |
1da177e4 | 579 | */ |
21b26f2f | 580 | static void netiucv_action_nop(fsm_instance *fi, int event, void *arg) |
1da177e4 LT |
581 | { |
582 | } | |
e82b0f2c | 583 | |
eebce385 | 584 | /* |
1da177e4 | 585 | * Actions of the connection statemachine |
eebce385 | 586 | */ |
1da177e4 LT |
587 | |
588 | /** | |
eebce385 MS |
589 | * netiucv_unpack_skb |
590 | * @conn: The connection where this skb has been received. | |
591 | * @pskb: The received skb. | |
1da177e4 | 592 | * |
eebce385 MS |
593 | * Unpack a just received skb and hand it over to upper layers. |
594 | * Helper function for conn_action_rx. | |
1da177e4 | 595 | */ |
eebce385 MS |
596 | static void netiucv_unpack_skb(struct iucv_connection *conn, |
597 | struct sk_buff *pskb) | |
1da177e4 LT |
598 | { |
599 | struct net_device *dev = conn->netdev; | |
eebce385 MS |
600 | struct netiucv_priv *privptr = netdev_priv(dev); |
601 | u16 offset = 0; | |
1da177e4 LT |
602 | |
603 | skb_put(pskb, NETIUCV_HDRLEN); | |
604 | pskb->dev = dev; | |
605 | pskb->ip_summed = CHECKSUM_NONE; | |
6c37c60c | 606 | pskb->protocol = cpu_to_be16(ETH_P_IP); |
1da177e4 LT |
607 | |
608 | while (1) { | |
609 | struct sk_buff *skb; | |
eebce385 | 610 | struct ll_header *header = (struct ll_header *) pskb->data; |
1da177e4 LT |
611 | |
612 | if (!header->next) | |
613 | break; | |
614 | ||
615 | skb_pull(pskb, NETIUCV_HDRLEN); | |
616 | header->next -= offset; | |
617 | offset += header->next; | |
618 | header->next -= NETIUCV_HDRLEN; | |
619 | if (skb_tailroom(pskb) < header->next) { | |
1da177e4 LT |
620 | IUCV_DBF_TEXT_(data, 2, "Illegal next field: %d > %d\n", |
621 | header->next, skb_tailroom(pskb)); | |
622 | return; | |
623 | } | |
624 | skb_put(pskb, header->next); | |
459a98ed | 625 | skb_reset_mac_header(pskb); |
1da177e4 LT |
626 | skb = dev_alloc_skb(pskb->len); |
627 | if (!skb) { | |
1da177e4 LT |
628 | IUCV_DBF_TEXT(data, 2, |
629 | "Out of memory in netiucv_unpack_skb\n"); | |
630 | privptr->stats.rx_dropped++; | |
631 | return; | |
632 | } | |
d626f62b ACM |
633 | skb_copy_from_linear_data(pskb, skb_put(skb, pskb->len), |
634 | pskb->len); | |
459a98ed | 635 | skb_reset_mac_header(skb); |
1da177e4 LT |
636 | skb->dev = pskb->dev; |
637 | skb->protocol = pskb->protocol; | |
638 | pskb->ip_summed = CHECKSUM_UNNECESSARY; | |
9b3efc01 JL |
639 | privptr->stats.rx_packets++; |
640 | privptr->stats.rx_bytes += skb->len; | |
1da177e4 LT |
641 | /* |
642 | * Since receiving is always initiated from a tasklet (in iucv.c), | |
643 | * we must use netif_rx_ni() instead of netif_rx() | |
644 | */ | |
645 | netif_rx_ni(skb); | |
1da177e4 LT |
646 | skb_pull(pskb, header->next); |
647 | skb_put(pskb, NETIUCV_HDRLEN); | |
648 | } | |
649 | } | |
650 | ||
eebce385 | 651 | static void conn_action_rx(fsm_instance *fi, int event, void *arg) |
1da177e4 | 652 | { |
eebce385 | 653 | struct iucv_event *ev = arg; |
1da177e4 | 654 | struct iucv_connection *conn = ev->conn; |
eebce385 MS |
655 | struct iucv_message *msg = ev->data; |
656 | struct netiucv_priv *privptr = netdev_priv(conn->netdev); | |
1da177e4 LT |
657 | int rc; |
658 | ||
2a2cf6b1 | 659 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
660 | |
661 | if (!conn->netdev) { | |
eebce385 | 662 | iucv_message_reject(conn->path, msg); |
1da177e4 | 663 | IUCV_DBF_TEXT(data, 2, |
eebce385 | 664 | "Received data for unlinked connection\n"); |
1da177e4 LT |
665 | return; |
666 | } | |
eebce385 MS |
667 | if (msg->length > conn->max_buffsize) { |
668 | iucv_message_reject(conn->path, msg); | |
1da177e4 | 669 | privptr->stats.rx_dropped++; |
1da177e4 | 670 | IUCV_DBF_TEXT_(data, 2, "msglen %d > max_buffsize %d\n", |
eebce385 | 671 | msg->length, conn->max_buffsize); |
1da177e4 LT |
672 | return; |
673 | } | |
27a884dc ACM |
674 | conn->rx_buff->data = conn->rx_buff->head; |
675 | skb_reset_tail_pointer(conn->rx_buff); | |
1da177e4 | 676 | conn->rx_buff->len = 0; |
eebce385 MS |
677 | rc = iucv_message_receive(conn->path, msg, 0, conn->rx_buff->data, |
678 | msg->length, NULL); | |
679 | if (rc || msg->length < 5) { | |
1da177e4 | 680 | privptr->stats.rx_errors++; |
1da177e4 LT |
681 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_receive\n", rc); |
682 | return; | |
683 | } | |
684 | netiucv_unpack_skb(conn, conn->rx_buff); | |
685 | } | |
686 | ||
eebce385 | 687 | static void conn_action_txdone(fsm_instance *fi, int event, void *arg) |
1da177e4 | 688 | { |
eebce385 | 689 | struct iucv_event *ev = arg; |
1da177e4 | 690 | struct iucv_connection *conn = ev->conn; |
eebce385 MS |
691 | struct iucv_message *msg = ev->data; |
692 | struct iucv_message txmsg; | |
1da177e4 | 693 | struct netiucv_priv *privptr = NULL; |
eebce385 MS |
694 | u32 single_flag = msg->tag; |
695 | u32 txbytes = 0; | |
696 | u32 txpackets = 0; | |
697 | u32 stat_maxcq = 0; | |
1da177e4 LT |
698 | struct sk_buff *skb; |
699 | unsigned long saveflags; | |
eebce385 MS |
700 | struct ll_header header; |
701 | int rc; | |
1da177e4 | 702 | |
2a2cf6b1 | 703 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 | 704 | |
d239ae33 UB |
705 | if (!conn || !conn->netdev) { |
706 | IUCV_DBF_TEXT(data, 2, | |
707 | "Send confirmation for unlinked connection\n"); | |
708 | return; | |
709 | } | |
710 | privptr = netdev_priv(conn->netdev); | |
1da177e4 LT |
711 | conn->prof.tx_pending--; |
712 | if (single_flag) { | |
713 | if ((skb = skb_dequeue(&conn->commit_queue))) { | |
63354797 | 714 | refcount_dec(&skb->users); |
1da177e4 LT |
715 | if (privptr) { |
716 | privptr->stats.tx_packets++; | |
717 | privptr->stats.tx_bytes += | |
718 | (skb->len - NETIUCV_HDRLEN | |
998221c2 | 719 | - NETIUCV_HDRLEN); |
1da177e4 | 720 | } |
998221c2 | 721 | dev_kfree_skb_any(skb); |
1da177e4 LT |
722 | } |
723 | } | |
27a884dc ACM |
724 | conn->tx_buff->data = conn->tx_buff->head; |
725 | skb_reset_tail_pointer(conn->tx_buff); | |
1da177e4 LT |
726 | conn->tx_buff->len = 0; |
727 | spin_lock_irqsave(&conn->collect_lock, saveflags); | |
728 | while ((skb = skb_dequeue(&conn->collect_queue))) { | |
729 | header.next = conn->tx_buff->len + skb->len + NETIUCV_HDRLEN; | |
59ae1d12 | 730 | skb_put_data(conn->tx_buff, &header, NETIUCV_HDRLEN); |
d626f62b ACM |
731 | skb_copy_from_linear_data(skb, |
732 | skb_put(conn->tx_buff, skb->len), | |
733 | skb->len); | |
1da177e4 LT |
734 | txbytes += skb->len; |
735 | txpackets++; | |
736 | stat_maxcq++; | |
63354797 | 737 | refcount_dec(&skb->users); |
1da177e4 LT |
738 | dev_kfree_skb_any(skb); |
739 | } | |
740 | if (conn->collect_len > conn->prof.maxmulti) | |
741 | conn->prof.maxmulti = conn->collect_len; | |
742 | conn->collect_len = 0; | |
743 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); | |
eebce385 MS |
744 | if (conn->tx_buff->len == 0) { |
745 | fsm_newstate(fi, CONN_STATE_IDLE); | |
746 | return; | |
747 | } | |
1da177e4 | 748 | |
eebce385 | 749 | header.next = 0; |
59ae1d12 | 750 | skb_put_data(conn->tx_buff, &header, NETIUCV_HDRLEN); |
ee6edb97 | 751 | conn->prof.send_stamp = jiffies; |
eebce385 MS |
752 | txmsg.class = 0; |
753 | txmsg.tag = 0; | |
754 | rc = iucv_message_send(conn->path, &txmsg, 0, 0, | |
1da177e4 | 755 | conn->tx_buff->data, conn->tx_buff->len); |
eebce385 MS |
756 | conn->prof.doios_multi++; |
757 | conn->prof.txlen += conn->tx_buff->len; | |
758 | conn->prof.tx_pending++; | |
759 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) | |
760 | conn->prof.tx_max_pending = conn->prof.tx_pending; | |
761 | if (rc) { | |
762 | conn->prof.tx_pending--; | |
1da177e4 | 763 | fsm_newstate(fi, CONN_STATE_IDLE); |
eebce385 MS |
764 | if (privptr) |
765 | privptr->stats.tx_errors += txpackets; | |
eebce385 MS |
766 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); |
767 | } else { | |
768 | if (privptr) { | |
769 | privptr->stats.tx_packets += txpackets; | |
770 | privptr->stats.tx_bytes += txbytes; | |
771 | } | |
772 | if (stat_maxcq > conn->prof.maxcqueue) | |
773 | conn->prof.maxcqueue = stat_maxcq; | |
774 | } | |
1da177e4 LT |
775 | } |
776 | ||
eebce385 | 777 | static void conn_action_connaccept(fsm_instance *fi, int event, void *arg) |
1da177e4 | 778 | { |
eebce385 | 779 | struct iucv_event *ev = arg; |
1da177e4 | 780 | struct iucv_connection *conn = ev->conn; |
eebce385 | 781 | struct iucv_path *path = ev->data; |
1da177e4 | 782 | struct net_device *netdev = conn->netdev; |
eebce385 | 783 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 784 | int rc; |
1da177e4 | 785 | |
2a2cf6b1 | 786 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 787 | |
eebce385 MS |
788 | conn->path = path; |
789 | path->msglim = NETIUCV_QUEUELEN_DEFAULT; | |
790 | path->flags = 0; | |
08e3356c | 791 | rc = iucv_path_accept(path, &netiucv_handler, conn->userdata , conn); |
1da177e4 | 792 | if (rc) { |
1da177e4 LT |
793 | IUCV_DBF_TEXT_(setup, 2, "rc %d from iucv_accept", rc); |
794 | return; | |
795 | } | |
796 | fsm_newstate(fi, CONN_STATE_IDLE); | |
eebce385 | 797 | netdev->tx_queue_len = conn->path->msglim; |
1da177e4 LT |
798 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); |
799 | } | |
800 | ||
eebce385 | 801 | static void conn_action_connreject(fsm_instance *fi, int event, void *arg) |
1da177e4 | 802 | { |
eebce385 MS |
803 | struct iucv_event *ev = arg; |
804 | struct iucv_path *path = ev->data; | |
1da177e4 | 805 | |
2a2cf6b1 | 806 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 | 807 | iucv_path_sever(path, NULL); |
1da177e4 LT |
808 | } |
809 | ||
eebce385 | 810 | static void conn_action_connack(fsm_instance *fi, int event, void *arg) |
1da177e4 | 811 | { |
eebce385 | 812 | struct iucv_connection *conn = arg; |
1da177e4 | 813 | struct net_device *netdev = conn->netdev; |
eebce385 | 814 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 815 | |
2a2cf6b1 | 816 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
817 | fsm_deltimer(&conn->timer); |
818 | fsm_newstate(fi, CONN_STATE_IDLE); | |
eebce385 | 819 | netdev->tx_queue_len = conn->path->msglim; |
1da177e4 LT |
820 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); |
821 | } | |
822 | ||
eebce385 | 823 | static void conn_action_conntimsev(fsm_instance *fi, int event, void *arg) |
1da177e4 | 824 | { |
eebce385 | 825 | struct iucv_connection *conn = arg; |
1da177e4 | 826 | |
2a2cf6b1 | 827 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 828 | fsm_deltimer(&conn->timer); |
08e3356c | 829 | iucv_path_sever(conn->path, conn->userdata); |
1da177e4 LT |
830 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
831 | } | |
832 | ||
eebce385 | 833 | static void conn_action_connsever(fsm_instance *fi, int event, void *arg) |
1da177e4 | 834 | { |
eebce385 | 835 | struct iucv_connection *conn = arg; |
1da177e4 | 836 | struct net_device *netdev = conn->netdev; |
eebce385 | 837 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 838 | |
2a2cf6b1 | 839 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
840 | |
841 | fsm_deltimer(&conn->timer); | |
08e3356c UB |
842 | iucv_path_sever(conn->path, conn->userdata); |
843 | dev_info(privptr->dev, "The peer z/VM guest %s has closed the " | |
844 | "connection\n", netiucv_printuser(conn)); | |
1da177e4 | 845 | IUCV_DBF_TEXT(data, 2, |
eebce385 | 846 | "conn_action_connsever: Remote dropped connection\n"); |
1da177e4 LT |
847 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
848 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); | |
849 | } | |
850 | ||
eebce385 | 851 | static void conn_action_start(fsm_instance *fi, int event, void *arg) |
1da177e4 | 852 | { |
eebce385 | 853 | struct iucv_connection *conn = arg; |
8f7c502c UB |
854 | struct net_device *netdev = conn->netdev; |
855 | struct netiucv_priv *privptr = netdev_priv(netdev); | |
1da177e4 LT |
856 | int rc; |
857 | ||
2a2cf6b1 | 858 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 859 | |
eebce385 | 860 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
1da177e4 | 861 | |
eebce385 MS |
862 | /* |
863 | * We must set the state before calling iucv_connect because the | |
864 | * callback handler could be called at any point after the connection | |
865 | * request is sent | |
866 | */ | |
1da177e4 LT |
867 | |
868 | fsm_newstate(fi, CONN_STATE_SETUPWAIT); | |
eebce385 | 869 | conn->path = iucv_path_alloc(NETIUCV_QUEUELEN_DEFAULT, 0, GFP_KERNEL); |
08e3356c UB |
870 | IUCV_DBF_TEXT_(setup, 2, "%s: connecting to %s ...\n", |
871 | netdev->name, netiucv_printuser(conn)); | |
872 | ||
eebce385 | 873 | rc = iucv_path_connect(conn->path, &netiucv_handler, conn->userid, |
08e3356c | 874 | NULL, conn->userdata, conn); |
1da177e4 | 875 | switch (rc) { |
eebce385 | 876 | case 0: |
8f7c502c | 877 | netdev->tx_queue_len = conn->path->msglim; |
eebce385 MS |
878 | fsm_addtimer(&conn->timer, NETIUCV_TIMEOUT_5SEC, |
879 | CONN_EVENT_TIMER, conn); | |
880 | return; | |
881 | case 11: | |
8f7c502c UB |
882 | dev_warn(privptr->dev, |
883 | "The IUCV device failed to connect to z/VM guest %s\n", | |
08e3356c | 884 | netiucv_printname(conn->userid, 8)); |
eebce385 MS |
885 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
886 | break; | |
887 | case 12: | |
8f7c502c UB |
888 | dev_warn(privptr->dev, |
889 | "The IUCV device failed to connect to the peer on z/VM" | |
08e3356c | 890 | " guest %s\n", netiucv_printname(conn->userid, 8)); |
eebce385 MS |
891 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
892 | break; | |
893 | case 13: | |
8f7c502c UB |
894 | dev_err(privptr->dev, |
895 | "Connecting the IUCV device would exceed the maximum" | |
896 | " number of IUCV connections\n"); | |
eebce385 MS |
897 | fsm_newstate(fi, CONN_STATE_CONNERR); |
898 | break; | |
899 | case 14: | |
8f7c502c UB |
900 | dev_err(privptr->dev, |
901 | "z/VM guest %s has too many IUCV connections" | |
902 | " to connect with the IUCV device\n", | |
08e3356c | 903 | netiucv_printname(conn->userid, 8)); |
eebce385 MS |
904 | fsm_newstate(fi, CONN_STATE_CONNERR); |
905 | break; | |
906 | case 15: | |
8f7c502c UB |
907 | dev_err(privptr->dev, |
908 | "The IUCV device cannot connect to a z/VM guest with no" | |
909 | " IUCV authorization\n"); | |
eebce385 MS |
910 | fsm_newstate(fi, CONN_STATE_CONNERR); |
911 | break; | |
912 | default: | |
8f7c502c UB |
913 | dev_err(privptr->dev, |
914 | "Connecting the IUCV device failed with error %d\n", | |
915 | rc); | |
eebce385 MS |
916 | fsm_newstate(fi, CONN_STATE_CONNERR); |
917 | break; | |
1da177e4 LT |
918 | } |
919 | IUCV_DBF_TEXT_(setup, 5, "iucv_connect rc is %d\n", rc); | |
eebce385 MS |
920 | kfree(conn->path); |
921 | conn->path = NULL; | |
1da177e4 LT |
922 | } |
923 | ||
eebce385 | 924 | static void netiucv_purge_skb_queue(struct sk_buff_head *q) |
1da177e4 LT |
925 | { |
926 | struct sk_buff *skb; | |
927 | ||
928 | while ((skb = skb_dequeue(q))) { | |
63354797 | 929 | refcount_dec(&skb->users); |
1da177e4 LT |
930 | dev_kfree_skb_any(skb); |
931 | } | |
932 | } | |
933 | ||
eebce385 | 934 | static void conn_action_stop(fsm_instance *fi, int event, void *arg) |
1da177e4 | 935 | { |
eebce385 | 936 | struct iucv_event *ev = arg; |
1da177e4 LT |
937 | struct iucv_connection *conn = ev->conn; |
938 | struct net_device *netdev = conn->netdev; | |
eebce385 | 939 | struct netiucv_priv *privptr = netdev_priv(netdev); |
1da177e4 | 940 | |
2a2cf6b1 | 941 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
942 | |
943 | fsm_deltimer(&conn->timer); | |
944 | fsm_newstate(fi, CONN_STATE_STOPPED); | |
945 | netiucv_purge_skb_queue(&conn->collect_queue); | |
eebce385 MS |
946 | if (conn->path) { |
947 | IUCV_DBF_TEXT(trace, 5, "calling iucv_path_sever\n"); | |
08e3356c | 948 | iucv_path_sever(conn->path, conn->userdata); |
eebce385 MS |
949 | kfree(conn->path); |
950 | conn->path = NULL; | |
951 | } | |
1da177e4 LT |
952 | netiucv_purge_skb_queue(&conn->commit_queue); |
953 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); | |
954 | } | |
955 | ||
eebce385 | 956 | static void conn_action_inval(fsm_instance *fi, int event, void *arg) |
1da177e4 | 957 | { |
eebce385 | 958 | struct iucv_connection *conn = arg; |
1da177e4 LT |
959 | struct net_device *netdev = conn->netdev; |
960 | ||
f082bcae UB |
961 | IUCV_DBF_TEXT_(data, 2, "%s('%s'): conn_action_inval called\n", |
962 | netdev->name, conn->userid); | |
1da177e4 LT |
963 | } |
964 | ||
965 | static const fsm_node conn_fsm[] = { | |
966 | { CONN_STATE_INVALID, CONN_EVENT_START, conn_action_inval }, | |
967 | { CONN_STATE_STOPPED, CONN_EVENT_START, conn_action_start }, | |
968 | ||
969 | { CONN_STATE_STOPPED, CONN_EVENT_STOP, conn_action_stop }, | |
970 | { CONN_STATE_STARTWAIT, CONN_EVENT_STOP, conn_action_stop }, | |
971 | { CONN_STATE_SETUPWAIT, CONN_EVENT_STOP, conn_action_stop }, | |
972 | { CONN_STATE_IDLE, CONN_EVENT_STOP, conn_action_stop }, | |
973 | { CONN_STATE_TX, CONN_EVENT_STOP, conn_action_stop }, | |
974 | { CONN_STATE_REGERR, CONN_EVENT_STOP, conn_action_stop }, | |
975 | { CONN_STATE_CONNERR, CONN_EVENT_STOP, conn_action_stop }, | |
976 | ||
977 | { CONN_STATE_STOPPED, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
978 | { CONN_STATE_STARTWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, | |
979 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, | |
980 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
981 | { CONN_STATE_TX, CONN_EVENT_CONN_REQ, conn_action_connreject }, | |
982 | ||
983 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_ACK, conn_action_connack }, | |
984 | { CONN_STATE_SETUPWAIT, CONN_EVENT_TIMER, conn_action_conntimsev }, | |
985 | ||
986 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
987 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
988 | { CONN_STATE_TX, CONN_EVENT_CONN_REJ, conn_action_connsever }, | |
989 | ||
990 | { CONN_STATE_IDLE, CONN_EVENT_RX, conn_action_rx }, | |
991 | { CONN_STATE_TX, CONN_EVENT_RX, conn_action_rx }, | |
992 | ||
993 | { CONN_STATE_TX, CONN_EVENT_TXDONE, conn_action_txdone }, | |
994 | { CONN_STATE_IDLE, CONN_EVENT_TXDONE, conn_action_txdone }, | |
995 | }; | |
996 | ||
997 | static const int CONN_FSM_LEN = sizeof(conn_fsm) / sizeof(fsm_node); | |
998 | ||
e82b0f2c | 999 | |
eebce385 | 1000 | /* |
1da177e4 | 1001 | * Actions for interface - statemachine. |
eebce385 | 1002 | */ |
1da177e4 LT |
1003 | |
1004 | /** | |
eebce385 MS |
1005 | * dev_action_start |
1006 | * @fi: An instance of an interface statemachine. | |
1007 | * @event: The event, just happened. | |
1008 | * @arg: Generic pointer, casted from struct net_device * upon call. | |
1da177e4 | 1009 | * |
eebce385 | 1010 | * Startup connection by sending CONN_EVENT_START to it. |
1da177e4 | 1011 | */ |
eebce385 | 1012 | static void dev_action_start(fsm_instance *fi, int event, void *arg) |
1da177e4 | 1013 | { |
eebce385 MS |
1014 | struct net_device *dev = arg; |
1015 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 | 1016 | |
2a2cf6b1 | 1017 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 | 1018 | |
1da177e4 | 1019 | fsm_newstate(fi, DEV_STATE_STARTWAIT); |
eebce385 | 1020 | fsm_event(privptr->conn->fsm, CONN_EVENT_START, privptr->conn); |
1da177e4 LT |
1021 | } |
1022 | ||
1023 | /** | |
1024 | * Shutdown connection by sending CONN_EVENT_STOP to it. | |
1025 | * | |
1026 | * @param fi An instance of an interface statemachine. | |
1027 | * @param event The event, just happened. | |
1028 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1029 | */ | |
1030 | static void | |
1031 | dev_action_stop(fsm_instance *fi, int event, void *arg) | |
1032 | { | |
eebce385 MS |
1033 | struct net_device *dev = arg; |
1034 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 LT |
1035 | struct iucv_event ev; |
1036 | ||
2a2cf6b1 | 1037 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1038 | |
1039 | ev.conn = privptr->conn; | |
1040 | ||
1041 | fsm_newstate(fi, DEV_STATE_STOPWAIT); | |
1042 | fsm_event(privptr->conn->fsm, CONN_EVENT_STOP, &ev); | |
1043 | } | |
1044 | ||
1045 | /** | |
1046 | * Called from connection statemachine | |
1047 | * when a connection is up and running. | |
1048 | * | |
1049 | * @param fi An instance of an interface statemachine. | |
1050 | * @param event The event, just happened. | |
1051 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1052 | */ | |
1053 | static void | |
1054 | dev_action_connup(fsm_instance *fi, int event, void *arg) | |
1055 | { | |
eebce385 MS |
1056 | struct net_device *dev = arg; |
1057 | struct netiucv_priv *privptr = netdev_priv(dev); | |
1da177e4 | 1058 | |
2a2cf6b1 | 1059 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1060 | |
1061 | switch (fsm_getstate(fi)) { | |
1062 | case DEV_STATE_STARTWAIT: | |
1063 | fsm_newstate(fi, DEV_STATE_RUNNING); | |
8f7c502c UB |
1064 | dev_info(privptr->dev, |
1065 | "The IUCV device has been connected" | |
08e3356c UB |
1066 | " successfully to %s\n", |
1067 | netiucv_printuser(privptr->conn)); | |
1da177e4 LT |
1068 | IUCV_DBF_TEXT(setup, 3, |
1069 | "connection is up and running\n"); | |
1070 | break; | |
1071 | case DEV_STATE_STOPWAIT: | |
1da177e4 LT |
1072 | IUCV_DBF_TEXT(data, 2, |
1073 | "dev_action_connup: in DEV_STATE_STOPWAIT\n"); | |
1074 | break; | |
1075 | } | |
1076 | } | |
1077 | ||
1078 | /** | |
1079 | * Called from connection statemachine | |
1080 | * when a connection has been shutdown. | |
1081 | * | |
1082 | * @param fi An instance of an interface statemachine. | |
1083 | * @param event The event, just happened. | |
1084 | * @param arg Generic pointer, casted from struct net_device * upon call. | |
1085 | */ | |
1086 | static void | |
1087 | dev_action_conndown(fsm_instance *fi, int event, void *arg) | |
1088 | { | |
2a2cf6b1 | 1089 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1090 | |
1091 | switch (fsm_getstate(fi)) { | |
1092 | case DEV_STATE_RUNNING: | |
1093 | fsm_newstate(fi, DEV_STATE_STARTWAIT); | |
1094 | break; | |
1095 | case DEV_STATE_STOPWAIT: | |
1096 | fsm_newstate(fi, DEV_STATE_STOPPED); | |
1097 | IUCV_DBF_TEXT(setup, 3, "connection is down\n"); | |
1098 | break; | |
1099 | } | |
1100 | } | |
1101 | ||
1102 | static const fsm_node dev_fsm[] = { | |
1103 | { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start }, | |
1104 | ||
1105 | { DEV_STATE_STOPWAIT, DEV_EVENT_START, dev_action_start }, | |
1106 | { DEV_STATE_STOPWAIT, DEV_EVENT_CONDOWN, dev_action_conndown }, | |
1107 | ||
1108 | { DEV_STATE_STARTWAIT, DEV_EVENT_STOP, dev_action_stop }, | |
1109 | { DEV_STATE_STARTWAIT, DEV_EVENT_CONUP, dev_action_connup }, | |
1110 | ||
1111 | { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop }, | |
1112 | { DEV_STATE_RUNNING, DEV_EVENT_CONDOWN, dev_action_conndown }, | |
21b26f2f | 1113 | { DEV_STATE_RUNNING, DEV_EVENT_CONUP, netiucv_action_nop }, |
1da177e4 LT |
1114 | }; |
1115 | ||
1116 | static const int DEV_FSM_LEN = sizeof(dev_fsm) / sizeof(fsm_node); | |
1117 | ||
1118 | /** | |
1119 | * Transmit a packet. | |
1120 | * This is a helper function for netiucv_tx(). | |
1121 | * | |
1122 | * @param conn Connection to be used for sending. | |
1123 | * @param skb Pointer to struct sk_buff of packet to send. | |
1124 | * The linklevel header has already been set up | |
1125 | * by netiucv_tx(). | |
1126 | * | |
1127 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1128 | */ | |
eebce385 MS |
1129 | static int netiucv_transmit_skb(struct iucv_connection *conn, |
1130 | struct sk_buff *skb) | |
1131 | { | |
1132 | struct iucv_message msg; | |
1da177e4 | 1133 | unsigned long saveflags; |
eebce385 MS |
1134 | struct ll_header header; |
1135 | int rc; | |
1da177e4 LT |
1136 | |
1137 | if (fsm_getstate(conn->fsm) != CONN_STATE_IDLE) { | |
1138 | int l = skb->len + NETIUCV_HDRLEN; | |
1139 | ||
1140 | spin_lock_irqsave(&conn->collect_lock, saveflags); | |
1141 | if (conn->collect_len + l > | |
1142 | (conn->max_buffsize - NETIUCV_HDRLEN)) { | |
1143 | rc = -EBUSY; | |
1144 | IUCV_DBF_TEXT(data, 2, | |
eebce385 | 1145 | "EBUSY from netiucv_transmit_skb\n"); |
1da177e4 | 1146 | } else { |
63354797 | 1147 | refcount_inc(&skb->users); |
1da177e4 LT |
1148 | skb_queue_tail(&conn->collect_queue, skb); |
1149 | conn->collect_len += l; | |
eebce385 | 1150 | rc = 0; |
1da177e4 LT |
1151 | } |
1152 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); | |
1153 | } else { | |
1154 | struct sk_buff *nskb = skb; | |
1155 | /** | |
1156 | * Copy the skb to a new allocated skb in lowmem only if the | |
1157 | * data is located above 2G in memory or tailroom is < 2. | |
1158 | */ | |
27a884dc ACM |
1159 | unsigned long hi = ((unsigned long)(skb_tail_pointer(skb) + |
1160 | NETIUCV_HDRLEN)) >> 31; | |
1da177e4 LT |
1161 | int copied = 0; |
1162 | if (hi || (skb_tailroom(skb) < 2)) { | |
1163 | nskb = alloc_skb(skb->len + NETIUCV_HDRLEN + | |
1164 | NETIUCV_HDRLEN, GFP_ATOMIC | GFP_DMA); | |
1165 | if (!nskb) { | |
1da177e4 LT |
1166 | IUCV_DBF_TEXT(data, 2, "alloc_skb failed\n"); |
1167 | rc = -ENOMEM; | |
1168 | return rc; | |
1169 | } else { | |
1170 | skb_reserve(nskb, NETIUCV_HDRLEN); | |
59ae1d12 | 1171 | skb_put_data(nskb, skb->data, skb->len); |
1da177e4 LT |
1172 | } |
1173 | copied = 1; | |
1174 | } | |
1175 | /** | |
1176 | * skb now is below 2G and has enough room. Add headers. | |
1177 | */ | |
1178 | header.next = nskb->len + NETIUCV_HDRLEN; | |
1179 | memcpy(skb_push(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); | |
1180 | header.next = 0; | |
59ae1d12 | 1181 | skb_put_data(nskb, &header, NETIUCV_HDRLEN); |
1da177e4 LT |
1182 | |
1183 | fsm_newstate(conn->fsm, CONN_STATE_TX); | |
ee6edb97 | 1184 | conn->prof.send_stamp = jiffies; |
e82b0f2c | 1185 | |
eebce385 MS |
1186 | msg.tag = 1; |
1187 | msg.class = 0; | |
1188 | rc = iucv_message_send(conn->path, &msg, 0, 0, | |
1189 | nskb->data, nskb->len); | |
1da177e4 LT |
1190 | conn->prof.doios_single++; |
1191 | conn->prof.txlen += skb->len; | |
1192 | conn->prof.tx_pending++; | |
1193 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) | |
1194 | conn->prof.tx_max_pending = conn->prof.tx_pending; | |
1195 | if (rc) { | |
1196 | struct netiucv_priv *privptr; | |
1197 | fsm_newstate(conn->fsm, CONN_STATE_IDLE); | |
1198 | conn->prof.tx_pending--; | |
eebce385 | 1199 | privptr = netdev_priv(conn->netdev); |
1da177e4 LT |
1200 | if (privptr) |
1201 | privptr->stats.tx_errors++; | |
1202 | if (copied) | |
1203 | dev_kfree_skb(nskb); | |
1204 | else { | |
1205 | /** | |
1206 | * Remove our headers. They get added | |
1207 | * again on retransmit. | |
1208 | */ | |
1209 | skb_pull(skb, NETIUCV_HDRLEN); | |
1210 | skb_trim(skb, skb->len - NETIUCV_HDRLEN); | |
1211 | } | |
1da177e4 LT |
1212 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); |
1213 | } else { | |
1214 | if (copied) | |
1215 | dev_kfree_skb(skb); | |
63354797 | 1216 | refcount_inc(&nskb->users); |
1da177e4 LT |
1217 | skb_queue_tail(&conn->commit_queue, nskb); |
1218 | } | |
1219 | } | |
1220 | ||
1221 | return rc; | |
1222 | } | |
e82b0f2c | 1223 | |
eebce385 | 1224 | /* |
1da177e4 | 1225 | * Interface API for upper network layers |
eebce385 | 1226 | */ |
1da177e4 LT |
1227 | |
1228 | /** | |
1229 | * Open an interface. | |
1230 | * Called from generic network layer when ifconfig up is run. | |
1231 | * | |
1232 | * @param dev Pointer to interface struct. | |
1233 | * | |
1234 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1235 | */ | |
eebce385 MS |
1236 | static int netiucv_open(struct net_device *dev) |
1237 | { | |
1238 | struct netiucv_priv *priv = netdev_priv(dev); | |
1239 | ||
1240 | fsm_event(priv->fsm, DEV_EVENT_START, dev); | |
1da177e4 LT |
1241 | return 0; |
1242 | } | |
1243 | ||
1244 | /** | |
1245 | * Close an interface. | |
1246 | * Called from generic network layer when ifconfig down is run. | |
1247 | * | |
1248 | * @param dev Pointer to interface struct. | |
1249 | * | |
1250 | * @return 0 on success, -ERRNO on failure. (Never fails.) | |
1251 | */ | |
eebce385 MS |
1252 | static int netiucv_close(struct net_device *dev) |
1253 | { | |
1254 | struct netiucv_priv *priv = netdev_priv(dev); | |
1255 | ||
1256 | fsm_event(priv->fsm, DEV_EVENT_STOP, dev); | |
1da177e4 LT |
1257 | return 0; |
1258 | } | |
1259 | ||
1260 | /** | |
1261 | * Start transmission of a packet. | |
1262 | * Called from generic network device layer. | |
1263 | * | |
1264 | * @param skb Pointer to buffer containing the packet. | |
1265 | * @param dev Pointer to interface struct. | |
1266 | * | |
1267 | * @return 0 if packet consumed, !0 if packet rejected. | |
1268 | * Note: If we return !0, then the packet is free'd by | |
1269 | * the generic network layer. | |
1270 | */ | |
1271 | static int netiucv_tx(struct sk_buff *skb, struct net_device *dev) | |
1272 | { | |
eebce385 MS |
1273 | struct netiucv_priv *privptr = netdev_priv(dev); |
1274 | int rc; | |
1da177e4 | 1275 | |
2a2cf6b1 | 1276 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1277 | /** |
1278 | * Some sanity checks ... | |
1279 | */ | |
1280 | if (skb == NULL) { | |
1da177e4 LT |
1281 | IUCV_DBF_TEXT(data, 2, "netiucv_tx: skb is NULL\n"); |
1282 | privptr->stats.tx_dropped++; | |
ec634fe3 | 1283 | return NETDEV_TX_OK; |
1da177e4 LT |
1284 | } |
1285 | if (skb_headroom(skb) < NETIUCV_HDRLEN) { | |
1da177e4 LT |
1286 | IUCV_DBF_TEXT(data, 2, |
1287 | "netiucv_tx: skb_headroom < NETIUCV_HDRLEN\n"); | |
1288 | dev_kfree_skb(skb); | |
1289 | privptr->stats.tx_dropped++; | |
ec634fe3 | 1290 | return NETDEV_TX_OK; |
1da177e4 LT |
1291 | } |
1292 | ||
1293 | /** | |
1294 | * If connection is not running, try to restart it | |
e82b0f2c | 1295 | * and throw away packet. |
1da177e4 LT |
1296 | */ |
1297 | if (fsm_getstate(privptr->fsm) != DEV_STATE_RUNNING) { | |
1da177e4 LT |
1298 | dev_kfree_skb(skb); |
1299 | privptr->stats.tx_dropped++; | |
1300 | privptr->stats.tx_errors++; | |
1301 | privptr->stats.tx_carrier_errors++; | |
ec634fe3 | 1302 | return NETDEV_TX_OK; |
1da177e4 LT |
1303 | } |
1304 | ||
1305 | if (netiucv_test_and_set_busy(dev)) { | |
1306 | IUCV_DBF_TEXT(data, 2, "EBUSY from netiucv_tx\n"); | |
4e584d66 | 1307 | return NETDEV_TX_BUSY; |
1da177e4 | 1308 | } |
860e9538 | 1309 | netif_trans_update(dev); |
5b548140 | 1310 | rc = netiucv_transmit_skb(privptr->conn, skb); |
1da177e4 | 1311 | netiucv_clear_busy(dev); |
5b548140 | 1312 | return rc ? NETDEV_TX_BUSY : NETDEV_TX_OK; |
1da177e4 LT |
1313 | } |
1314 | ||
1315 | /** | |
eebce385 MS |
1316 | * netiucv_stats |
1317 | * @dev: Pointer to interface struct. | |
1da177e4 | 1318 | * |
eebce385 | 1319 | * Returns interface statistics of a device. |
1da177e4 | 1320 | * |
eebce385 | 1321 | * Returns pointer to stats struct of this interface. |
1da177e4 | 1322 | */ |
eebce385 | 1323 | static struct net_device_stats *netiucv_stats (struct net_device * dev) |
1da177e4 | 1324 | { |
eebce385 MS |
1325 | struct netiucv_priv *priv = netdev_priv(dev); |
1326 | ||
2a2cf6b1 | 1327 | IUCV_DBF_TEXT(trace, 5, __func__); |
eebce385 | 1328 | return &priv->stats; |
1da177e4 LT |
1329 | } |
1330 | ||
eebce385 | 1331 | /* |
1da177e4 | 1332 | * attributes in sysfs |
eebce385 | 1333 | */ |
1da177e4 | 1334 | |
eebce385 MS |
1335 | static ssize_t user_show(struct device *dev, struct device_attribute *attr, |
1336 | char *buf) | |
1da177e4 | 1337 | { |
dff59b64 | 1338 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1339 | |
2a2cf6b1 | 1340 | IUCV_DBF_TEXT(trace, 5, __func__); |
08e3356c | 1341 | return sprintf(buf, "%s\n", netiucv_printuser(priv->conn)); |
1da177e4 LT |
1342 | } |
1343 | ||
08e3356c UB |
1344 | static int netiucv_check_user(const char *buf, size_t count, char *username, |
1345 | char *userdata) | |
1da177e4 | 1346 | { |
08e3356c UB |
1347 | const char *p; |
1348 | int i; | |
1da177e4 | 1349 | |
08e3356c UB |
1350 | p = strchr(buf, '.'); |
1351 | if ((p && ((count > 26) || | |
1352 | ((p - buf) > 8) || | |
1353 | (buf + count - p > 18))) || | |
1354 | (!p && (count > 9))) { | |
1355 | IUCV_DBF_TEXT(setup, 2, "conn_write: too long\n"); | |
1da177e4 LT |
1356 | return -EINVAL; |
1357 | } | |
1358 | ||
08e3356c UB |
1359 | for (i = 0, p = buf; i < 8 && *p && *p != '.'; i++, p++) { |
1360 | if (isalnum(*p) || *p == '$') { | |
1361 | username[i] = toupper(*p); | |
eebce385 MS |
1362 | continue; |
1363 | } | |
08e3356c | 1364 | if (*p == '\n') |
1da177e4 LT |
1365 | /* trailing lf, grr */ |
1366 | break; | |
eebce385 | 1367 | IUCV_DBF_TEXT_(setup, 2, |
08e3356c | 1368 | "conn_write: invalid character %02x\n", *p); |
eebce385 | 1369 | return -EINVAL; |
1da177e4 | 1370 | } |
eebce385 | 1371 | while (i < 8) |
1da177e4 | 1372 | username[i++] = ' '; |
16a83b30 | 1373 | username[8] = '\0'; |
1da177e4 | 1374 | |
08e3356c UB |
1375 | if (*p == '.') { |
1376 | p++; | |
1377 | for (i = 0; i < 16 && *p; i++, p++) { | |
1378 | if (*p == '\n') | |
1379 | break; | |
1380 | userdata[i] = toupper(*p); | |
1381 | } | |
1382 | while (i > 0 && i < 16) | |
1383 | userdata[i++] = ' '; | |
1384 | } else | |
1385 | memcpy(userdata, iucvMagic_ascii, 16); | |
1386 | userdata[16] = '\0'; | |
1387 | ASCEBC(userdata, 16); | |
1388 | ||
1389 | return 0; | |
1390 | } | |
1391 | ||
1392 | static ssize_t user_write(struct device *dev, struct device_attribute *attr, | |
1393 | const char *buf, size_t count) | |
1394 | { | |
1395 | struct netiucv_priv *priv = dev_get_drvdata(dev); | |
1396 | struct net_device *ndev = priv->conn->netdev; | |
1397 | char username[9]; | |
1398 | char userdata[17]; | |
1399 | int rc; | |
1400 | struct iucv_connection *cp; | |
1401 | ||
1402 | IUCV_DBF_TEXT(trace, 3, __func__); | |
1403 | rc = netiucv_check_user(buf, count, username, userdata); | |
1404 | if (rc) | |
1405 | return rc; | |
1406 | ||
eebce385 MS |
1407 | if (memcmp(username, priv->conn->userid, 9) && |
1408 | (ndev->flags & (IFF_UP | IFF_RUNNING))) { | |
1409 | /* username changed while the interface is active. */ | |
eebce385 | 1410 | IUCV_DBF_TEXT(setup, 2, "user_write: device active\n"); |
f082bcae | 1411 | return -EPERM; |
eebce385 MS |
1412 | } |
1413 | read_lock_bh(&iucv_connection_rwlock); | |
1414 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
08e3356c UB |
1415 | if (!strncmp(username, cp->userid, 9) && |
1416 | !strncmp(userdata, cp->userdata, 17) && cp->netdev != ndev) { | |
eebce385 | 1417 | read_unlock_bh(&iucv_connection_rwlock); |
08e3356c UB |
1418 | IUCV_DBF_TEXT_(setup, 2, "user_write: Connection to %s " |
1419 | "already exists\n", netiucv_printuser(cp)); | |
eebce385 | 1420 | return -EEXIST; |
1da177e4 LT |
1421 | } |
1422 | } | |
eebce385 | 1423 | read_unlock_bh(&iucv_connection_rwlock); |
1da177e4 | 1424 | memcpy(priv->conn->userid, username, 9); |
08e3356c | 1425 | memcpy(priv->conn->userdata, userdata, 17); |
1da177e4 | 1426 | return count; |
1da177e4 LT |
1427 | } |
1428 | ||
1429 | static DEVICE_ATTR(user, 0644, user_show, user_write); | |
1430 | ||
eebce385 MS |
1431 | static ssize_t buffer_show (struct device *dev, struct device_attribute *attr, |
1432 | char *buf) | |
dff59b64 GKH |
1433 | { |
1434 | struct netiucv_priv *priv = dev_get_drvdata(dev); | |
1da177e4 | 1435 | |
2a2cf6b1 | 1436 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1437 | return sprintf(buf, "%d\n", priv->conn->max_buffsize); |
1438 | } | |
1439 | ||
eebce385 MS |
1440 | static ssize_t buffer_write (struct device *dev, struct device_attribute *attr, |
1441 | const char *buf, size_t count) | |
1da177e4 | 1442 | { |
dff59b64 | 1443 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1444 | struct net_device *ndev = priv->conn->netdev; |
9edebf11 UB |
1445 | unsigned int bs1; |
1446 | int rc; | |
1da177e4 | 1447 | |
2a2cf6b1 | 1448 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1449 | if (count >= 39) |
1450 | return -EINVAL; | |
1451 | ||
9edebf11 | 1452 | rc = kstrtouint(buf, 0, &bs1); |
1da177e4 | 1453 | |
9edebf11 UB |
1454 | if (rc == -EINVAL) { |
1455 | IUCV_DBF_TEXT_(setup, 2, "buffer_write: invalid char %s\n", | |
1456 | buf); | |
1da177e4 LT |
1457 | return -EINVAL; |
1458 | } | |
9edebf11 | 1459 | if ((rc == -ERANGE) || (bs1 > NETIUCV_BUFSIZE_MAX)) { |
1da177e4 LT |
1460 | IUCV_DBF_TEXT_(setup, 2, |
1461 | "buffer_write: buffer size %d too large\n", | |
1462 | bs1); | |
1463 | return -EINVAL; | |
1464 | } | |
1465 | if ((ndev->flags & IFF_RUNNING) && | |
1466 | (bs1 < (ndev->mtu + NETIUCV_HDRLEN + 2))) { | |
1da177e4 LT |
1467 | IUCV_DBF_TEXT_(setup, 2, |
1468 | "buffer_write: buffer size %d too small\n", | |
1469 | bs1); | |
1470 | return -EINVAL; | |
1471 | } | |
1472 | if (bs1 < (576 + NETIUCV_HDRLEN + NETIUCV_HDRLEN)) { | |
1da177e4 LT |
1473 | IUCV_DBF_TEXT_(setup, 2, |
1474 | "buffer_write: buffer size %d too small\n", | |
1475 | bs1); | |
1476 | return -EINVAL; | |
1477 | } | |
1478 | ||
1479 | priv->conn->max_buffsize = bs1; | |
1480 | if (!(ndev->flags & IFF_RUNNING)) | |
1481 | ndev->mtu = bs1 - NETIUCV_HDRLEN - NETIUCV_HDRLEN; | |
1482 | ||
1483 | return count; | |
1484 | ||
1485 | } | |
1486 | ||
1487 | static DEVICE_ATTR(buffer, 0644, buffer_show, buffer_write); | |
1488 | ||
eebce385 MS |
1489 | static ssize_t dev_fsm_show (struct device *dev, struct device_attribute *attr, |
1490 | char *buf) | |
1da177e4 | 1491 | { |
dff59b64 | 1492 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1493 | |
2a2cf6b1 | 1494 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1495 | return sprintf(buf, "%s\n", fsm_getstate_str(priv->fsm)); |
1496 | } | |
1497 | ||
1498 | static DEVICE_ATTR(device_fsm_state, 0444, dev_fsm_show, NULL); | |
1499 | ||
eebce385 MS |
1500 | static ssize_t conn_fsm_show (struct device *dev, |
1501 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1502 | { |
dff59b64 | 1503 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1504 | |
2a2cf6b1 | 1505 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1506 | return sprintf(buf, "%s\n", fsm_getstate_str(priv->conn->fsm)); |
1507 | } | |
1508 | ||
1509 | static DEVICE_ATTR(connection_fsm_state, 0444, conn_fsm_show, NULL); | |
1510 | ||
eebce385 MS |
1511 | static ssize_t maxmulti_show (struct device *dev, |
1512 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1513 | { |
dff59b64 | 1514 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1515 | |
2a2cf6b1 | 1516 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1517 | return sprintf(buf, "%ld\n", priv->conn->prof.maxmulti); |
1518 | } | |
1519 | ||
eebce385 MS |
1520 | static ssize_t maxmulti_write (struct device *dev, |
1521 | struct device_attribute *attr, | |
1522 | const char *buf, size_t count) | |
1da177e4 | 1523 | { |
dff59b64 | 1524 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1525 | |
2a2cf6b1 | 1526 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1527 | priv->conn->prof.maxmulti = 0; |
1528 | return count; | |
1529 | } | |
1530 | ||
1531 | static DEVICE_ATTR(max_tx_buffer_used, 0644, maxmulti_show, maxmulti_write); | |
1532 | ||
eebce385 MS |
1533 | static ssize_t maxcq_show (struct device *dev, struct device_attribute *attr, |
1534 | char *buf) | |
1da177e4 | 1535 | { |
dff59b64 | 1536 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1537 | |
2a2cf6b1 | 1538 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1539 | return sprintf(buf, "%ld\n", priv->conn->prof.maxcqueue); |
1540 | } | |
1541 | ||
eebce385 MS |
1542 | static ssize_t maxcq_write (struct device *dev, struct device_attribute *attr, |
1543 | const char *buf, size_t count) | |
1da177e4 | 1544 | { |
dff59b64 | 1545 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
e82b0f2c | 1546 | |
2a2cf6b1 | 1547 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1548 | priv->conn->prof.maxcqueue = 0; |
1549 | return count; | |
1550 | } | |
1551 | ||
1552 | static DEVICE_ATTR(max_chained_skbs, 0644, maxcq_show, maxcq_write); | |
1553 | ||
eebce385 MS |
1554 | static ssize_t sdoio_show (struct device *dev, struct device_attribute *attr, |
1555 | char *buf) | |
1da177e4 | 1556 | { |
dff59b64 | 1557 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1558 | |
2a2cf6b1 | 1559 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1560 | return sprintf(buf, "%ld\n", priv->conn->prof.doios_single); |
1561 | } | |
1562 | ||
eebce385 MS |
1563 | static ssize_t sdoio_write (struct device *dev, struct device_attribute *attr, |
1564 | const char *buf, size_t count) | |
1da177e4 | 1565 | { |
dff59b64 | 1566 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
e82b0f2c | 1567 | |
2a2cf6b1 | 1568 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1569 | priv->conn->prof.doios_single = 0; |
1570 | return count; | |
1571 | } | |
1572 | ||
1573 | static DEVICE_ATTR(tx_single_write_ops, 0644, sdoio_show, sdoio_write); | |
1574 | ||
eebce385 MS |
1575 | static ssize_t mdoio_show (struct device *dev, struct device_attribute *attr, |
1576 | char *buf) | |
1da177e4 | 1577 | { |
dff59b64 | 1578 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1579 | |
2a2cf6b1 | 1580 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1581 | return sprintf(buf, "%ld\n", priv->conn->prof.doios_multi); |
1582 | } | |
1583 | ||
eebce385 MS |
1584 | static ssize_t mdoio_write (struct device *dev, struct device_attribute *attr, |
1585 | const char *buf, size_t count) | |
1da177e4 | 1586 | { |
dff59b64 | 1587 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
e82b0f2c | 1588 | |
2a2cf6b1 | 1589 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1590 | priv->conn->prof.doios_multi = 0; |
1591 | return count; | |
1592 | } | |
1593 | ||
1594 | static DEVICE_ATTR(tx_multi_write_ops, 0644, mdoio_show, mdoio_write); | |
1595 | ||
eebce385 MS |
1596 | static ssize_t txlen_show (struct device *dev, struct device_attribute *attr, |
1597 | char *buf) | |
1da177e4 | 1598 | { |
dff59b64 | 1599 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1600 | |
2a2cf6b1 | 1601 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1602 | return sprintf(buf, "%ld\n", priv->conn->prof.txlen); |
1603 | } | |
1604 | ||
eebce385 MS |
1605 | static ssize_t txlen_write (struct device *dev, struct device_attribute *attr, |
1606 | const char *buf, size_t count) | |
1da177e4 | 1607 | { |
dff59b64 | 1608 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
e82b0f2c | 1609 | |
2a2cf6b1 | 1610 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1611 | priv->conn->prof.txlen = 0; |
1612 | return count; | |
1613 | } | |
1614 | ||
1615 | static DEVICE_ATTR(netto_bytes, 0644, txlen_show, txlen_write); | |
1616 | ||
eebce385 MS |
1617 | static ssize_t txtime_show (struct device *dev, struct device_attribute *attr, |
1618 | char *buf) | |
1da177e4 | 1619 | { |
dff59b64 | 1620 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1621 | |
2a2cf6b1 | 1622 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1623 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_time); |
1624 | } | |
1625 | ||
eebce385 MS |
1626 | static ssize_t txtime_write (struct device *dev, struct device_attribute *attr, |
1627 | const char *buf, size_t count) | |
1da177e4 | 1628 | { |
dff59b64 | 1629 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
e82b0f2c | 1630 | |
2a2cf6b1 | 1631 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1632 | priv->conn->prof.tx_time = 0; |
1633 | return count; | |
1634 | } | |
1635 | ||
1636 | static DEVICE_ATTR(max_tx_io_time, 0644, txtime_show, txtime_write); | |
1637 | ||
eebce385 MS |
1638 | static ssize_t txpend_show (struct device *dev, struct device_attribute *attr, |
1639 | char *buf) | |
1da177e4 | 1640 | { |
dff59b64 | 1641 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1642 | |
2a2cf6b1 | 1643 | IUCV_DBF_TEXT(trace, 5, __func__); |
1da177e4 LT |
1644 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_pending); |
1645 | } | |
1646 | ||
eebce385 MS |
1647 | static ssize_t txpend_write (struct device *dev, struct device_attribute *attr, |
1648 | const char *buf, size_t count) | |
1da177e4 | 1649 | { |
dff59b64 | 1650 | struct netiucv_priv *priv = dev_get_drvdata(dev); |
1da177e4 | 1651 | |
2a2cf6b1 | 1652 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1653 | priv->conn->prof.tx_pending = 0; |
1654 | return count; | |
1655 | } | |
1656 | ||
1657 | static DEVICE_ATTR(tx_pending, 0644, txpend_show, txpend_write); | |
1658 | ||
eebce385 MS |
1659 | static ssize_t txmpnd_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.tx_max_pending); |
1666 | } | |
1667 | ||
eebce385 MS |
1668 | static ssize_t txmpnd_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); |
1da177e4 | 1672 | |
2a2cf6b1 | 1673 | IUCV_DBF_TEXT(trace, 4, __func__); |
1da177e4 LT |
1674 | priv->conn->prof.tx_max_pending = 0; |
1675 | return count; | |
1676 | } | |
1677 | ||
1678 | static DEVICE_ATTR(tx_max_pending, 0644, txmpnd_show, txmpnd_write); | |
1679 | ||
1680 | static struct attribute *netiucv_attrs[] = { | |
1681 | &dev_attr_buffer.attr, | |
1682 | &dev_attr_user.attr, | |
1683 | NULL, | |
1684 | }; | |
1685 | ||
1686 | static struct attribute_group netiucv_attr_group = { | |
1687 | .attrs = netiucv_attrs, | |
1688 | }; | |
1689 | ||
1690 | static struct attribute *netiucv_stat_attrs[] = { | |
1691 | &dev_attr_device_fsm_state.attr, | |
1692 | &dev_attr_connection_fsm_state.attr, | |
1693 | &dev_attr_max_tx_buffer_used.attr, | |
1694 | &dev_attr_max_chained_skbs.attr, | |
1695 | &dev_attr_tx_single_write_ops.attr, | |
1696 | &dev_attr_tx_multi_write_ops.attr, | |
1697 | &dev_attr_netto_bytes.attr, | |
1698 | &dev_attr_max_tx_io_time.attr, | |
1699 | &dev_attr_tx_pending.attr, | |
1700 | &dev_attr_tx_max_pending.attr, | |
1701 | NULL, | |
1702 | }; | |
1703 | ||
1704 | static struct attribute_group netiucv_stat_attr_group = { | |
1705 | .name = "stats", | |
1706 | .attrs = netiucv_stat_attrs, | |
1707 | }; | |
1708 | ||
0b945293 | 1709 | static const struct attribute_group *netiucv_attr_groups[] = { |
1710 | &netiucv_stat_attr_group, | |
1711 | &netiucv_attr_group, | |
1712 | NULL, | |
1713 | }; | |
1da177e4 | 1714 | |
eebce385 | 1715 | static int netiucv_register_device(struct net_device *ndev) |
1da177e4 | 1716 | { |
eebce385 | 1717 | struct netiucv_priv *priv = netdev_priv(ndev); |
88abaab4 | 1718 | struct device *dev = kzalloc(sizeof(struct device), GFP_KERNEL); |
1da177e4 LT |
1719 | int ret; |
1720 | ||
2a2cf6b1 | 1721 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1722 | |
1723 | if (dev) { | |
1bf5b285 | 1724 | dev_set_name(dev, "net%s", ndev->name); |
1da177e4 LT |
1725 | dev->bus = &iucv_bus; |
1726 | dev->parent = iucv_root; | |
0b945293 | 1727 | dev->groups = netiucv_attr_groups; |
1da177e4 LT |
1728 | /* |
1729 | * The release function could be called after the | |
1730 | * module has been unloaded. It's _only_ task is to | |
1731 | * free the struct. Therefore, we specify kfree() | |
1732 | * directly here. (Probably a little bit obfuscating | |
1733 | * but legitime ...). | |
1734 | */ | |
1735 | dev->release = (void (*)(struct device *))kfree; | |
1736 | dev->driver = &netiucv_driver; | |
1737 | } else | |
1738 | return -ENOMEM; | |
1739 | ||
1740 | ret = device_register(dev); | |
c6304933 SO |
1741 | if (ret) { |
1742 | put_device(dev); | |
1da177e4 | 1743 | return ret; |
c6304933 | 1744 | } |
1da177e4 | 1745 | priv->dev = dev; |
dff59b64 | 1746 | dev_set_drvdata(dev, priv); |
1da177e4 | 1747 | return 0; |
1da177e4 LT |
1748 | } |
1749 | ||
eebce385 | 1750 | static void netiucv_unregister_device(struct device *dev) |
1da177e4 | 1751 | { |
2a2cf6b1 | 1752 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1753 | device_unregister(dev); |
1754 | } | |
1755 | ||
1756 | /** | |
1757 | * Allocate and initialize a new connection structure. | |
1758 | * Add it to the list of netiucv connections; | |
1759 | */ | |
eebce385 | 1760 | static struct iucv_connection *netiucv_new_connection(struct net_device *dev, |
08e3356c UB |
1761 | char *username, |
1762 | char *userdata) | |
eebce385 MS |
1763 | { |
1764 | struct iucv_connection *conn; | |
1da177e4 | 1765 | |
eebce385 MS |
1766 | conn = kzalloc(sizeof(*conn), GFP_KERNEL); |
1767 | if (!conn) | |
1768 | goto out; | |
1769 | skb_queue_head_init(&conn->collect_queue); | |
1770 | skb_queue_head_init(&conn->commit_queue); | |
1771 | spin_lock_init(&conn->collect_lock); | |
1772 | conn->max_buffsize = NETIUCV_BUFSIZE_DEFAULT; | |
1773 | conn->netdev = dev; | |
1774 | ||
1775 | conn->rx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA); | |
1776 | if (!conn->rx_buff) | |
1777 | goto out_conn; | |
1778 | conn->tx_buff = alloc_skb(conn->max_buffsize, GFP_KERNEL | GFP_DMA); | |
1779 | if (!conn->tx_buff) | |
1780 | goto out_rx; | |
1781 | conn->fsm = init_fsm("netiucvconn", conn_state_names, | |
1782 | conn_event_names, NR_CONN_STATES, | |
1783 | NR_CONN_EVENTS, conn_fsm, CONN_FSM_LEN, | |
1784 | GFP_KERNEL); | |
1785 | if (!conn->fsm) | |
1786 | goto out_tx; | |
1787 | ||
1788 | fsm_settimer(conn->fsm, &conn->timer); | |
1789 | fsm_newstate(conn->fsm, CONN_STATE_INVALID); | |
1790 | ||
08e3356c UB |
1791 | if (userdata) |
1792 | memcpy(conn->userdata, userdata, 17); | |
eebce385 MS |
1793 | if (username) { |
1794 | memcpy(conn->userid, username, 9); | |
1795 | fsm_newstate(conn->fsm, CONN_STATE_STOPPED); | |
1da177e4 | 1796 | } |
eebce385 MS |
1797 | |
1798 | write_lock_bh(&iucv_connection_rwlock); | |
1799 | list_add_tail(&conn->list, &iucv_connection_list); | |
1800 | write_unlock_bh(&iucv_connection_rwlock); | |
1da177e4 | 1801 | return conn; |
eebce385 MS |
1802 | |
1803 | out_tx: | |
1804 | kfree_skb(conn->tx_buff); | |
1805 | out_rx: | |
1806 | kfree_skb(conn->rx_buff); | |
1807 | out_conn: | |
1808 | kfree(conn); | |
1809 | out: | |
1810 | return NULL; | |
1da177e4 LT |
1811 | } |
1812 | ||
1813 | /** | |
1814 | * Release a connection structure and remove it from the | |
1815 | * list of netiucv connections. | |
1816 | */ | |
eebce385 | 1817 | static void netiucv_remove_connection(struct iucv_connection *conn) |
1da177e4 | 1818 | { |
08e3356c | 1819 | |
2a2cf6b1 | 1820 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 MS |
1821 | write_lock_bh(&iucv_connection_rwlock); |
1822 | list_del_init(&conn->list); | |
1823 | write_unlock_bh(&iucv_connection_rwlock); | |
0be4acec UB |
1824 | fsm_deltimer(&conn->timer); |
1825 | netiucv_purge_skb_queue(&conn->collect_queue); | |
eebce385 | 1826 | if (conn->path) { |
08e3356c | 1827 | iucv_path_sever(conn->path, conn->userdata); |
eebce385 MS |
1828 | kfree(conn->path); |
1829 | conn->path = NULL; | |
1da177e4 | 1830 | } |
0be4acec | 1831 | netiucv_purge_skb_queue(&conn->commit_queue); |
eebce385 MS |
1832 | kfree_fsm(conn->fsm); |
1833 | kfree_skb(conn->rx_buff); | |
1834 | kfree_skb(conn->tx_buff); | |
1da177e4 LT |
1835 | } |
1836 | ||
1837 | /** | |
1838 | * Release everything of a net device. | |
1839 | */ | |
eebce385 | 1840 | static void netiucv_free_netdevice(struct net_device *dev) |
1da177e4 | 1841 | { |
eebce385 | 1842 | struct netiucv_priv *privptr = netdev_priv(dev); |
1da177e4 | 1843 | |
2a2cf6b1 | 1844 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1845 | |
1846 | if (!dev) | |
1847 | return; | |
1848 | ||
1da177e4 LT |
1849 | if (privptr) { |
1850 | if (privptr->conn) | |
1851 | netiucv_remove_connection(privptr->conn); | |
1852 | if (privptr->fsm) | |
1853 | kfree_fsm(privptr->fsm); | |
1854 | privptr->conn = NULL; privptr->fsm = NULL; | |
1855 | /* privptr gets freed by free_netdev() */ | |
1856 | } | |
1da177e4 LT |
1857 | } |
1858 | ||
1859 | /** | |
1860 | * Initialize a net device. (Called from kernel in alloc_netdev()) | |
1861 | */ | |
4edd73b5 FB |
1862 | static const struct net_device_ops netiucv_netdev_ops = { |
1863 | .ndo_open = netiucv_open, | |
1864 | .ndo_stop = netiucv_close, | |
1865 | .ndo_get_stats = netiucv_stats, | |
1866 | .ndo_start_xmit = netiucv_tx, | |
4edd73b5 FB |
1867 | }; |
1868 | ||
eebce385 | 1869 | static void netiucv_setup_netdevice(struct net_device *dev) |
1da177e4 | 1870 | { |
1da177e4 | 1871 | dev->mtu = NETIUCV_MTU_DEFAULT; |
46b3ef4c JW |
1872 | dev->min_mtu = 576; |
1873 | dev->max_mtu = NETIUCV_MTU_MAX; | |
cd1997f6 SR |
1874 | dev->needs_free_netdev = true; |
1875 | dev->priv_destructor = netiucv_free_netdevice; | |
1da177e4 LT |
1876 | dev->hard_header_len = NETIUCV_HDRLEN; |
1877 | dev->addr_len = 0; | |
1878 | dev->type = ARPHRD_SLIP; | |
1879 | dev->tx_queue_len = NETIUCV_QUEUELEN_DEFAULT; | |
1880 | dev->flags = IFF_POINTOPOINT | IFF_NOARP; | |
4edd73b5 | 1881 | dev->netdev_ops = &netiucv_netdev_ops; |
1da177e4 LT |
1882 | } |
1883 | ||
1884 | /** | |
1885 | * Allocate and initialize everything of a net device. | |
1886 | */ | |
08e3356c | 1887 | static struct net_device *netiucv_init_netdevice(char *username, char *userdata) |
1da177e4 LT |
1888 | { |
1889 | struct netiucv_priv *privptr; | |
1890 | struct net_device *dev; | |
1891 | ||
1892 | dev = alloc_netdev(sizeof(struct netiucv_priv), "iucv%d", | |
c835a677 | 1893 | NET_NAME_UNKNOWN, netiucv_setup_netdevice); |
1da177e4 LT |
1894 | if (!dev) |
1895 | return NULL; | |
aaf9522d | 1896 | rtnl_lock(); |
1d503563 UB |
1897 | if (dev_alloc_name(dev, dev->name) < 0) |
1898 | goto out_netdev; | |
1da177e4 | 1899 | |
eebce385 | 1900 | privptr = netdev_priv(dev); |
1da177e4 LT |
1901 | privptr->fsm = init_fsm("netiucvdev", dev_state_names, |
1902 | dev_event_names, NR_DEV_STATES, NR_DEV_EVENTS, | |
1903 | dev_fsm, DEV_FSM_LEN, GFP_KERNEL); | |
eebce385 MS |
1904 | if (!privptr->fsm) |
1905 | goto out_netdev; | |
1906 | ||
08e3356c | 1907 | privptr->conn = netiucv_new_connection(dev, username, userdata); |
1da177e4 | 1908 | if (!privptr->conn) { |
1da177e4 | 1909 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_new_connection\n"); |
eebce385 | 1910 | goto out_fsm; |
1da177e4 LT |
1911 | } |
1912 | fsm_newstate(privptr->fsm, DEV_STATE_STOPPED); | |
1da177e4 | 1913 | return dev; |
eebce385 MS |
1914 | |
1915 | out_fsm: | |
1916 | kfree_fsm(privptr->fsm); | |
1917 | out_netdev: | |
aaf9522d | 1918 | rtnl_unlock(); |
eebce385 MS |
1919 | free_netdev(dev); |
1920 | return NULL; | |
1da177e4 LT |
1921 | } |
1922 | ||
36369569 GKH |
1923 | static ssize_t connection_store(struct device_driver *drv, const char *buf, |
1924 | size_t count) | |
1da177e4 | 1925 | { |
16a83b30 | 1926 | char username[9]; |
08e3356c UB |
1927 | char userdata[17]; |
1928 | int rc; | |
1da177e4 | 1929 | struct net_device *dev; |
eebce385 MS |
1930 | struct netiucv_priv *priv; |
1931 | struct iucv_connection *cp; | |
1da177e4 | 1932 | |
2a2cf6b1 | 1933 | IUCV_DBF_TEXT(trace, 3, __func__); |
08e3356c UB |
1934 | rc = netiucv_check_user(buf, count, username, userdata); |
1935 | if (rc) | |
1936 | return rc; | |
16a83b30 | 1937 | |
eebce385 MS |
1938 | read_lock_bh(&iucv_connection_rwlock); |
1939 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
08e3356c UB |
1940 | if (!strncmp(username, cp->userid, 9) && |
1941 | !strncmp(userdata, cp->userdata, 17)) { | |
eebce385 | 1942 | read_unlock_bh(&iucv_connection_rwlock); |
08e3356c UB |
1943 | IUCV_DBF_TEXT_(setup, 2, "conn_write: Connection to %s " |
1944 | "already exists\n", netiucv_printuser(cp)); | |
eebce385 MS |
1945 | return -EEXIST; |
1946 | } | |
16a83b30 | 1947 | } |
eebce385 MS |
1948 | read_unlock_bh(&iucv_connection_rwlock); |
1949 | ||
08e3356c | 1950 | dev = netiucv_init_netdevice(username, userdata); |
1da177e4 | 1951 | if (!dev) { |
1da177e4 LT |
1952 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_init_netdevice\n"); |
1953 | return -ENODEV; | |
1954 | } | |
1955 | ||
eebce385 MS |
1956 | rc = netiucv_register_device(dev); |
1957 | if (rc) { | |
aaf9522d | 1958 | rtnl_unlock(); |
1da177e4 | 1959 | IUCV_DBF_TEXT_(setup, 2, |
eebce385 | 1960 | "ret %d from netiucv_register_device\n", rc); |
1da177e4 LT |
1961 | goto out_free_ndev; |
1962 | } | |
1963 | ||
1964 | /* sysfs magic */ | |
eebce385 MS |
1965 | priv = netdev_priv(dev); |
1966 | SET_NETDEV_DEV(dev, priv->dev); | |
1da177e4 | 1967 | |
aaf9522d BP |
1968 | rc = register_netdevice(dev); |
1969 | rtnl_unlock(); | |
eebce385 MS |
1970 | if (rc) |
1971 | goto out_unreg; | |
1da177e4 | 1972 | |
08e3356c UB |
1973 | dev_info(priv->dev, "The IUCV interface to %s has been established " |
1974 | "successfully\n", | |
1975 | netiucv_printuser(priv->conn)); | |
e82b0f2c | 1976 | |
1da177e4 LT |
1977 | return count; |
1978 | ||
eebce385 MS |
1979 | out_unreg: |
1980 | netiucv_unregister_device(priv->dev); | |
1da177e4 | 1981 | out_free_ndev: |
1da177e4 | 1982 | netiucv_free_netdevice(dev); |
eebce385 | 1983 | return rc; |
1da177e4 | 1984 | } |
36369569 | 1985 | static DRIVER_ATTR_WO(connection); |
1da177e4 | 1986 | |
36369569 GKH |
1987 | static ssize_t remove_store(struct device_driver *drv, const char *buf, |
1988 | size_t count) | |
1da177e4 | 1989 | { |
eebce385 | 1990 | struct iucv_connection *cp; |
1da177e4 LT |
1991 | struct net_device *ndev; |
1992 | struct netiucv_priv *priv; | |
1993 | struct device *dev; | |
1994 | char name[IFNAMSIZ]; | |
eebce385 | 1995 | const char *p; |
1da177e4 LT |
1996 | int i; |
1997 | ||
2a2cf6b1 | 1998 | IUCV_DBF_TEXT(trace, 3, __func__); |
1da177e4 LT |
1999 | |
2000 | if (count >= IFNAMSIZ) | |
a419aef8 | 2001 | count = IFNAMSIZ - 1; |
1da177e4 | 2002 | |
eebce385 MS |
2003 | for (i = 0, p = buf; i < count && *p; i++, p++) { |
2004 | if (*p == '\n' || *p == ' ') | |
1da177e4 LT |
2005 | /* trailing lf, grr */ |
2006 | break; | |
eebce385 | 2007 | name[i] = *p; |
1da177e4 LT |
2008 | } |
2009 | name[i] = '\0'; | |
2010 | ||
eebce385 MS |
2011 | read_lock_bh(&iucv_connection_rwlock); |
2012 | list_for_each_entry(cp, &iucv_connection_list, list) { | |
2013 | ndev = cp->netdev; | |
2014 | priv = netdev_priv(ndev); | |
1da177e4 | 2015 | dev = priv->dev; |
eebce385 MS |
2016 | if (strncmp(name, ndev->name, count)) |
2017 | continue; | |
2018 | read_unlock_bh(&iucv_connection_rwlock); | |
1da177e4 | 2019 | if (ndev->flags & (IFF_UP | IFF_RUNNING)) { |
8f7c502c UB |
2020 | dev_warn(dev, "The IUCV device is connected" |
2021 | " to %s and cannot be removed\n", | |
2022 | priv->conn->userid); | |
1da177e4 | 2023 | IUCV_DBF_TEXT(data, 2, "remove_write: still active\n"); |
f082bcae | 2024 | return -EPERM; |
1da177e4 LT |
2025 | } |
2026 | unregister_netdev(ndev); | |
2027 | netiucv_unregister_device(dev); | |
2028 | return count; | |
2029 | } | |
eebce385 | 2030 | read_unlock_bh(&iucv_connection_rwlock); |
1da177e4 LT |
2031 | IUCV_DBF_TEXT(data, 2, "remove_write: unknown device\n"); |
2032 | return -EINVAL; | |
2033 | } | |
36369569 | 2034 | static DRIVER_ATTR_WO(remove); |
1da177e4 | 2035 | |
eebce385 MS |
2036 | static struct attribute * netiucv_drv_attrs[] = { |
2037 | &driver_attr_connection.attr, | |
2038 | &driver_attr_remove.attr, | |
2039 | NULL, | |
2040 | }; | |
2041 | ||
2042 | static struct attribute_group netiucv_drv_attr_group = { | |
2043 | .attrs = netiucv_drv_attrs, | |
2044 | }; | |
2045 | ||
a4dbd674 | 2046 | static const struct attribute_group *netiucv_drv_attr_groups[] = { |
5b88feb1 CH |
2047 | &netiucv_drv_attr_group, |
2048 | NULL, | |
2049 | }; | |
2050 | ||
eebce385 | 2051 | static void netiucv_banner(void) |
1da177e4 | 2052 | { |
8f7c502c | 2053 | pr_info("driver initialized\n"); |
1da177e4 LT |
2054 | } |
2055 | ||
eebce385 | 2056 | static void __exit netiucv_exit(void) |
1da177e4 | 2057 | { |
eebce385 MS |
2058 | struct iucv_connection *cp; |
2059 | struct net_device *ndev; | |
2060 | struct netiucv_priv *priv; | |
2061 | struct device *dev; | |
2062 | ||
2a2cf6b1 | 2063 | IUCV_DBF_TEXT(trace, 3, __func__); |
eebce385 MS |
2064 | while (!list_empty(&iucv_connection_list)) { |
2065 | cp = list_entry(iucv_connection_list.next, | |
2066 | struct iucv_connection, list); | |
eebce385 MS |
2067 | ndev = cp->netdev; |
2068 | priv = netdev_priv(ndev); | |
2069 | dev = priv->dev; | |
1da177e4 LT |
2070 | |
2071 | unregister_netdev(ndev); | |
2072 | netiucv_unregister_device(dev); | |
2073 | } | |
2074 | ||
1da177e4 | 2075 | driver_unregister(&netiucv_driver); |
eebce385 | 2076 | iucv_unregister(&netiucv_handler, 1); |
1da177e4 LT |
2077 | iucv_unregister_dbf_views(); |
2078 | ||
8f7c502c | 2079 | pr_info("driver unloaded\n"); |
1da177e4 LT |
2080 | return; |
2081 | } | |
2082 | ||
eebce385 | 2083 | static int __init netiucv_init(void) |
1da177e4 | 2084 | { |
eebce385 | 2085 | int rc; |
e82b0f2c | 2086 | |
eebce385 MS |
2087 | rc = iucv_register_dbf_views(); |
2088 | if (rc) | |
2089 | goto out; | |
2090 | rc = iucv_register(&netiucv_handler, 1); | |
2091 | if (rc) | |
2092 | goto out_dbf; | |
2a2cf6b1 | 2093 | IUCV_DBF_TEXT(trace, 3, __func__); |
0a0a8310 | 2094 | netiucv_driver.groups = netiucv_drv_attr_groups; |
eebce385 MS |
2095 | rc = driver_register(&netiucv_driver); |
2096 | if (rc) { | |
eebce385 MS |
2097 | IUCV_DBF_TEXT_(setup, 2, "ret %d from driver_register\n", rc); |
2098 | goto out_iucv; | |
1da177e4 | 2099 | } |
97ccf6f9 | 2100 | |
eebce385 MS |
2101 | netiucv_banner(); |
2102 | return rc; | |
2103 | ||
eebce385 MS |
2104 | out_iucv: |
2105 | iucv_unregister(&netiucv_handler, 1); | |
2106 | out_dbf: | |
2107 | iucv_unregister_dbf_views(); | |
2108 | out: | |
2109 | return rc; | |
1da177e4 | 2110 | } |
e82b0f2c | 2111 | |
1da177e4 LT |
2112 | module_init(netiucv_init); |
2113 | module_exit(netiucv_exit); | |
2114 | MODULE_LICENSE("GPL"); |