Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * IUCV network driver |
| 3 | * |
| 4 | * Copyright (C) 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation |
| 5 | * Author(s): Fritz Elfert (elfert@de.ibm.com, felfert@millenux.com) |
| 6 | * |
Cornelia Huck | 4ce3b30 | 2006-01-14 13:21:04 -0800 | [diff] [blame] | 7 | * Sysfs integration and all bugs therein by Cornelia Huck |
| 8 | * (cornelia.huck@de.ibm.com) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * |
| 10 | * Documentation used: |
| 11 | * the source of the original IUCV driver by: |
| 12 | * Stefan Hegewald <hegewald@de.ibm.com> |
| 13 | * Hartmut Penner <hpenner@de.ibm.com> |
| 14 | * Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) |
| 15 | * Martin Schwidefsky (schwidefsky@de.ibm.com) |
| 16 | * Alan Altmark (Alan_Altmark@us.ibm.com) Sept. 2000 |
| 17 | * |
| 18 | * This program is free software; you can redistribute it and/or modify |
| 19 | * it under the terms of the GNU General Public License as published by |
| 20 | * the Free Software Foundation; either version 2, or (at your option) |
| 21 | * any later version. |
| 22 | * |
| 23 | * This program is distributed in the hope that it will be useful, |
| 24 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 25 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 26 | * GNU General Public License for more details. |
| 27 | * |
| 28 | * You should have received a copy of the GNU General Public License |
| 29 | * along with this program; if not, write to the Free Software |
| 30 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 31 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | */ |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 33 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #undef DEBUG |
| 35 | |
| 36 | #include <linux/module.h> |
| 37 | #include <linux/init.h> |
| 38 | #include <linux/kernel.h> |
| 39 | #include <linux/slab.h> |
| 40 | #include <linux/errno.h> |
| 41 | #include <linux/types.h> |
| 42 | #include <linux/interrupt.h> |
| 43 | #include <linux/timer.h> |
| 44 | #include <linux/sched.h> |
| 45 | #include <linux/bitops.h> |
| 46 | |
| 47 | #include <linux/signal.h> |
| 48 | #include <linux/string.h> |
| 49 | #include <linux/device.h> |
| 50 | |
| 51 | #include <linux/ip.h> |
| 52 | #include <linux/if_arp.h> |
| 53 | #include <linux/tcp.h> |
| 54 | #include <linux/skbuff.h> |
| 55 | #include <linux/ctype.h> |
| 56 | #include <net/dst.h> |
| 57 | |
| 58 | #include <asm/io.h> |
| 59 | #include <asm/uaccess.h> |
| 60 | |
| 61 | #include "iucv.h" |
| 62 | #include "fsm.h" |
| 63 | |
| 64 | MODULE_AUTHOR |
| 65 | ("(C) 2001 IBM Corporation by Fritz Elfert (felfert@millenux.com)"); |
| 66 | MODULE_DESCRIPTION ("Linux for S/390 IUCV network driver"); |
| 67 | |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 68 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | #define PRINTK_HEADER " iucv: " /* for debugging */ |
| 70 | |
| 71 | static struct device_driver netiucv_driver = { |
| 72 | .name = "netiucv", |
| 73 | .bus = &iucv_bus, |
| 74 | }; |
| 75 | |
| 76 | /** |
| 77 | * Per connection profiling data |
| 78 | */ |
| 79 | struct connection_profile { |
| 80 | unsigned long maxmulti; |
| 81 | unsigned long maxcqueue; |
| 82 | unsigned long doios_single; |
| 83 | unsigned long doios_multi; |
| 84 | unsigned long txlen; |
| 85 | unsigned long tx_time; |
| 86 | struct timespec send_stamp; |
| 87 | unsigned long tx_pending; |
| 88 | unsigned long tx_max_pending; |
| 89 | }; |
| 90 | |
| 91 | /** |
| 92 | * Representation of one iucv connection |
| 93 | */ |
| 94 | struct iucv_connection { |
| 95 | struct iucv_connection *next; |
| 96 | iucv_handle_t handle; |
| 97 | __u16 pathid; |
| 98 | struct sk_buff *rx_buff; |
| 99 | struct sk_buff *tx_buff; |
| 100 | struct sk_buff_head collect_queue; |
| 101 | struct sk_buff_head commit_queue; |
| 102 | spinlock_t collect_lock; |
| 103 | int collect_len; |
| 104 | int max_buffsize; |
| 105 | fsm_timer timer; |
| 106 | fsm_instance *fsm; |
| 107 | struct net_device *netdev; |
| 108 | struct connection_profile prof; |
| 109 | char userid[9]; |
| 110 | }; |
| 111 | |
| 112 | /** |
| 113 | * Linked list of all connection structs. |
| 114 | */ |
| 115 | static struct iucv_connection *iucv_connections; |
| 116 | |
| 117 | /** |
| 118 | * Representation of event-data for the |
| 119 | * connection state machine. |
| 120 | */ |
| 121 | struct iucv_event { |
| 122 | struct iucv_connection *conn; |
| 123 | void *data; |
| 124 | }; |
| 125 | |
| 126 | /** |
| 127 | * Private part of the network device structure |
| 128 | */ |
| 129 | struct netiucv_priv { |
| 130 | struct net_device_stats stats; |
| 131 | unsigned long tbusy; |
| 132 | fsm_instance *fsm; |
| 133 | struct iucv_connection *conn; |
| 134 | struct device *dev; |
| 135 | }; |
| 136 | |
| 137 | /** |
| 138 | * Link level header for a packet. |
| 139 | */ |
| 140 | typedef struct ll_header_t { |
| 141 | __u16 next; |
| 142 | } ll_header; |
| 143 | |
| 144 | #define NETIUCV_HDRLEN (sizeof(ll_header)) |
| 145 | #define NETIUCV_BUFSIZE_MAX 32768 |
| 146 | #define NETIUCV_BUFSIZE_DEFAULT NETIUCV_BUFSIZE_MAX |
| 147 | #define NETIUCV_MTU_MAX (NETIUCV_BUFSIZE_MAX - NETIUCV_HDRLEN) |
| 148 | #define NETIUCV_MTU_DEFAULT 9216 |
| 149 | #define NETIUCV_QUEUELEN_DEFAULT 50 |
| 150 | #define NETIUCV_TIMEOUT_5SEC 5000 |
| 151 | |
| 152 | /** |
| 153 | * Compatibility macros for busy handling |
| 154 | * of network devices. |
| 155 | */ |
| 156 | static __inline__ void netiucv_clear_busy(struct net_device *dev) |
| 157 | { |
| 158 | clear_bit(0, &(((struct netiucv_priv *)dev->priv)->tbusy)); |
| 159 | netif_wake_queue(dev); |
| 160 | } |
| 161 | |
| 162 | static __inline__ int netiucv_test_and_set_busy(struct net_device *dev) |
| 163 | { |
| 164 | netif_stop_queue(dev); |
| 165 | return test_and_set_bit(0, &((struct netiucv_priv *)dev->priv)->tbusy); |
| 166 | } |
| 167 | |
| 168 | static __u8 iucv_host[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; |
| 169 | static __u8 iucvMagic[16] = { |
| 170 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, |
| 171 | 0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40 |
| 172 | }; |
| 173 | |
| 174 | /** |
| 175 | * This mask means the 16-byte IUCV "magic" and the origin userid must |
| 176 | * match exactly as specified in order to give connection_pending() |
| 177 | * control. |
| 178 | */ |
| 179 | static __u8 netiucv_mask[] = { |
| 180 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 181 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 182 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff |
| 183 | }; |
| 184 | |
| 185 | /** |
| 186 | * Convert an iucv userId to its printable |
| 187 | * form (strip whitespace at end). |
| 188 | * |
| 189 | * @param An iucv userId |
| 190 | * |
| 191 | * @returns The printable string (static data!!) |
| 192 | */ |
| 193 | static __inline__ char * |
| 194 | netiucv_printname(char *name) |
| 195 | { |
| 196 | static char tmp[9]; |
| 197 | char *p = tmp; |
| 198 | memcpy(tmp, name, 8); |
| 199 | tmp[8] = '\0'; |
| 200 | while (*p && (!isspace(*p))) |
| 201 | p++; |
| 202 | *p = '\0'; |
| 203 | return tmp; |
| 204 | } |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 205 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | /** |
| 207 | * States of the interface statemachine. |
| 208 | */ |
| 209 | enum dev_states { |
| 210 | DEV_STATE_STOPPED, |
| 211 | DEV_STATE_STARTWAIT, |
| 212 | DEV_STATE_STOPWAIT, |
| 213 | DEV_STATE_RUNNING, |
| 214 | /** |
| 215 | * MUST be always the last element!! |
| 216 | */ |
| 217 | NR_DEV_STATES |
| 218 | }; |
| 219 | |
| 220 | static const char *dev_state_names[] = { |
| 221 | "Stopped", |
| 222 | "StartWait", |
| 223 | "StopWait", |
| 224 | "Running", |
| 225 | }; |
| 226 | |
| 227 | /** |
| 228 | * Events of the interface statemachine. |
| 229 | */ |
| 230 | enum dev_events { |
| 231 | DEV_EVENT_START, |
| 232 | DEV_EVENT_STOP, |
| 233 | DEV_EVENT_CONUP, |
| 234 | DEV_EVENT_CONDOWN, |
| 235 | /** |
| 236 | * MUST be always the last element!! |
| 237 | */ |
| 238 | NR_DEV_EVENTS |
| 239 | }; |
| 240 | |
| 241 | static const char *dev_event_names[] = { |
| 242 | "Start", |
| 243 | "Stop", |
| 244 | "Connection up", |
| 245 | "Connection down", |
| 246 | }; |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | /** |
| 249 | * Events of the connection statemachine |
| 250 | */ |
| 251 | enum conn_events { |
| 252 | /** |
| 253 | * Events, representing callbacks from |
| 254 | * lowlevel iucv layer) |
| 255 | */ |
| 256 | CONN_EVENT_CONN_REQ, |
| 257 | CONN_EVENT_CONN_ACK, |
| 258 | CONN_EVENT_CONN_REJ, |
| 259 | CONN_EVENT_CONN_SUS, |
| 260 | CONN_EVENT_CONN_RES, |
| 261 | CONN_EVENT_RX, |
| 262 | CONN_EVENT_TXDONE, |
| 263 | |
| 264 | /** |
| 265 | * Events, representing errors return codes from |
| 266 | * calls to lowlevel iucv layer |
| 267 | */ |
| 268 | |
| 269 | /** |
| 270 | * Event, representing timer expiry. |
| 271 | */ |
| 272 | CONN_EVENT_TIMER, |
| 273 | |
| 274 | /** |
| 275 | * Events, representing commands from upper levels. |
| 276 | */ |
| 277 | CONN_EVENT_START, |
| 278 | CONN_EVENT_STOP, |
| 279 | |
| 280 | /** |
| 281 | * MUST be always the last element!! |
| 282 | */ |
| 283 | NR_CONN_EVENTS, |
| 284 | }; |
| 285 | |
| 286 | static const char *conn_event_names[] = { |
| 287 | "Remote connection request", |
| 288 | "Remote connection acknowledge", |
| 289 | "Remote connection reject", |
| 290 | "Connection suspended", |
| 291 | "Connection resumed", |
| 292 | "Data received", |
| 293 | "Data sent", |
| 294 | |
| 295 | "Timer", |
| 296 | |
| 297 | "Start", |
| 298 | "Stop", |
| 299 | }; |
| 300 | |
| 301 | /** |
| 302 | * States of the connection statemachine. |
| 303 | */ |
| 304 | enum conn_states { |
| 305 | /** |
| 306 | * Connection not assigned to any device, |
| 307 | * initial state, invalid |
| 308 | */ |
| 309 | CONN_STATE_INVALID, |
| 310 | |
| 311 | /** |
| 312 | * Userid assigned but not operating |
| 313 | */ |
| 314 | CONN_STATE_STOPPED, |
| 315 | |
| 316 | /** |
| 317 | * Connection registered, |
| 318 | * no connection request sent yet, |
| 319 | * no connection request received |
| 320 | */ |
| 321 | CONN_STATE_STARTWAIT, |
| 322 | |
| 323 | /** |
| 324 | * Connection registered and connection request sent, |
| 325 | * no acknowledge and no connection request received yet. |
| 326 | */ |
| 327 | CONN_STATE_SETUPWAIT, |
| 328 | |
| 329 | /** |
| 330 | * Connection up and running idle |
| 331 | */ |
| 332 | CONN_STATE_IDLE, |
| 333 | |
| 334 | /** |
| 335 | * Data sent, awaiting CONN_EVENT_TXDONE |
| 336 | */ |
| 337 | CONN_STATE_TX, |
| 338 | |
| 339 | /** |
| 340 | * Error during registration. |
| 341 | */ |
| 342 | CONN_STATE_REGERR, |
| 343 | |
| 344 | /** |
| 345 | * Error during registration. |
| 346 | */ |
| 347 | CONN_STATE_CONNERR, |
| 348 | |
| 349 | /** |
| 350 | * MUST be always the last element!! |
| 351 | */ |
| 352 | NR_CONN_STATES, |
| 353 | }; |
| 354 | |
| 355 | static const char *conn_state_names[] = { |
| 356 | "Invalid", |
| 357 | "Stopped", |
| 358 | "StartWait", |
| 359 | "SetupWait", |
| 360 | "Idle", |
| 361 | "TX", |
| 362 | "Terminating", |
| 363 | "Registration error", |
| 364 | "Connect error", |
| 365 | }; |
| 366 | |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 367 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | /** |
| 369 | * Debug Facility Stuff |
| 370 | */ |
| 371 | static debug_info_t *iucv_dbf_setup = NULL; |
| 372 | static debug_info_t *iucv_dbf_data = NULL; |
| 373 | static debug_info_t *iucv_dbf_trace = NULL; |
| 374 | |
| 375 | DEFINE_PER_CPU(char[256], iucv_dbf_txt_buf); |
| 376 | |
| 377 | static void |
| 378 | iucv_unregister_dbf_views(void) |
| 379 | { |
| 380 | if (iucv_dbf_setup) |
| 381 | debug_unregister(iucv_dbf_setup); |
| 382 | if (iucv_dbf_data) |
| 383 | debug_unregister(iucv_dbf_data); |
| 384 | if (iucv_dbf_trace) |
| 385 | debug_unregister(iucv_dbf_trace); |
| 386 | } |
| 387 | static int |
| 388 | iucv_register_dbf_views(void) |
| 389 | { |
| 390 | iucv_dbf_setup = debug_register(IUCV_DBF_SETUP_NAME, |
Michael Holzheu | 66a464d | 2005-06-25 14:55:33 -0700 | [diff] [blame] | 391 | IUCV_DBF_SETUP_PAGES, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | IUCV_DBF_SETUP_NR_AREAS, |
| 393 | IUCV_DBF_SETUP_LEN); |
| 394 | iucv_dbf_data = debug_register(IUCV_DBF_DATA_NAME, |
Michael Holzheu | 66a464d | 2005-06-25 14:55:33 -0700 | [diff] [blame] | 395 | IUCV_DBF_DATA_PAGES, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | IUCV_DBF_DATA_NR_AREAS, |
| 397 | IUCV_DBF_DATA_LEN); |
| 398 | iucv_dbf_trace = debug_register(IUCV_DBF_TRACE_NAME, |
Michael Holzheu | 66a464d | 2005-06-25 14:55:33 -0700 | [diff] [blame] | 399 | IUCV_DBF_TRACE_PAGES, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | IUCV_DBF_TRACE_NR_AREAS, |
| 401 | IUCV_DBF_TRACE_LEN); |
| 402 | |
| 403 | if ((iucv_dbf_setup == NULL) || (iucv_dbf_data == NULL) || |
| 404 | (iucv_dbf_trace == NULL)) { |
| 405 | iucv_unregister_dbf_views(); |
| 406 | return -ENOMEM; |
| 407 | } |
| 408 | debug_register_view(iucv_dbf_setup, &debug_hex_ascii_view); |
| 409 | debug_set_level(iucv_dbf_setup, IUCV_DBF_SETUP_LEVEL); |
| 410 | |
| 411 | debug_register_view(iucv_dbf_data, &debug_hex_ascii_view); |
| 412 | debug_set_level(iucv_dbf_data, IUCV_DBF_DATA_LEVEL); |
| 413 | |
| 414 | debug_register_view(iucv_dbf_trace, &debug_hex_ascii_view); |
| 415 | debug_set_level(iucv_dbf_trace, IUCV_DBF_TRACE_LEVEL); |
| 416 | |
| 417 | return 0; |
| 418 | } |
| 419 | |
| 420 | /** |
| 421 | * Callback-wrappers, called from lowlevel iucv layer. |
| 422 | *****************************************************************************/ |
| 423 | |
| 424 | static void |
| 425 | netiucv_callback_rx(iucv_MessagePending *eib, void *pgm_data) |
| 426 | { |
| 427 | struct iucv_connection *conn = (struct iucv_connection *)pgm_data; |
| 428 | struct iucv_event ev; |
| 429 | |
| 430 | ev.conn = conn; |
| 431 | ev.data = (void *)eib; |
| 432 | |
| 433 | fsm_event(conn->fsm, CONN_EVENT_RX, &ev); |
| 434 | } |
| 435 | |
| 436 | static void |
| 437 | netiucv_callback_txdone(iucv_MessageComplete *eib, void *pgm_data) |
| 438 | { |
| 439 | struct iucv_connection *conn = (struct iucv_connection *)pgm_data; |
| 440 | struct iucv_event ev; |
| 441 | |
| 442 | ev.conn = conn; |
| 443 | ev.data = (void *)eib; |
| 444 | fsm_event(conn->fsm, CONN_EVENT_TXDONE, &ev); |
| 445 | } |
| 446 | |
| 447 | static void |
| 448 | netiucv_callback_connack(iucv_ConnectionComplete *eib, void *pgm_data) |
| 449 | { |
| 450 | struct iucv_connection *conn = (struct iucv_connection *)pgm_data; |
| 451 | struct iucv_event ev; |
| 452 | |
| 453 | ev.conn = conn; |
| 454 | ev.data = (void *)eib; |
| 455 | fsm_event(conn->fsm, CONN_EVENT_CONN_ACK, &ev); |
| 456 | } |
| 457 | |
| 458 | static void |
| 459 | netiucv_callback_connreq(iucv_ConnectionPending *eib, void *pgm_data) |
| 460 | { |
| 461 | struct iucv_connection *conn = (struct iucv_connection *)pgm_data; |
| 462 | struct iucv_event ev; |
| 463 | |
| 464 | ev.conn = conn; |
| 465 | ev.data = (void *)eib; |
| 466 | fsm_event(conn->fsm, CONN_EVENT_CONN_REQ, &ev); |
| 467 | } |
| 468 | |
| 469 | static void |
| 470 | netiucv_callback_connrej(iucv_ConnectionSevered *eib, void *pgm_data) |
| 471 | { |
| 472 | struct iucv_connection *conn = (struct iucv_connection *)pgm_data; |
| 473 | struct iucv_event ev; |
| 474 | |
| 475 | ev.conn = conn; |
| 476 | ev.data = (void *)eib; |
| 477 | fsm_event(conn->fsm, CONN_EVENT_CONN_REJ, &ev); |
| 478 | } |
| 479 | |
| 480 | static void |
| 481 | netiucv_callback_connsusp(iucv_ConnectionQuiesced *eib, void *pgm_data) |
| 482 | { |
| 483 | struct iucv_connection *conn = (struct iucv_connection *)pgm_data; |
| 484 | struct iucv_event ev; |
| 485 | |
| 486 | ev.conn = conn; |
| 487 | ev.data = (void *)eib; |
| 488 | fsm_event(conn->fsm, CONN_EVENT_CONN_SUS, &ev); |
| 489 | } |
| 490 | |
| 491 | static void |
| 492 | netiucv_callback_connres(iucv_ConnectionResumed *eib, void *pgm_data) |
| 493 | { |
| 494 | struct iucv_connection *conn = (struct iucv_connection *)pgm_data; |
| 495 | struct iucv_event ev; |
| 496 | |
| 497 | ev.conn = conn; |
| 498 | ev.data = (void *)eib; |
| 499 | fsm_event(conn->fsm, CONN_EVENT_CONN_RES, &ev); |
| 500 | } |
| 501 | |
| 502 | static iucv_interrupt_ops_t netiucv_ops = { |
| 503 | .ConnectionPending = netiucv_callback_connreq, |
| 504 | .ConnectionComplete = netiucv_callback_connack, |
| 505 | .ConnectionSevered = netiucv_callback_connrej, |
| 506 | .ConnectionQuiesced = netiucv_callback_connsusp, |
| 507 | .ConnectionResumed = netiucv_callback_connres, |
| 508 | .MessagePending = netiucv_callback_rx, |
| 509 | .MessageComplete = netiucv_callback_txdone |
| 510 | }; |
| 511 | |
| 512 | /** |
| 513 | * Dummy NOP action for all statemachines |
| 514 | */ |
| 515 | static void |
| 516 | fsm_action_nop(fsm_instance *fi, int event, void *arg) |
| 517 | { |
| 518 | } |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 519 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | /** |
| 521 | * Actions of the connection statemachine |
| 522 | *****************************************************************************/ |
| 523 | |
| 524 | /** |
| 525 | * Helper function for conn_action_rx() |
| 526 | * Unpack a just received skb and hand it over to |
| 527 | * upper layers. |
| 528 | * |
| 529 | * @param conn The connection where this skb has been received. |
| 530 | * @param pskb The received skb. |
| 531 | */ |
| 532 | //static __inline__ void |
| 533 | static void |
| 534 | netiucv_unpack_skb(struct iucv_connection *conn, struct sk_buff *pskb) |
| 535 | { |
| 536 | struct net_device *dev = conn->netdev; |
| 537 | struct netiucv_priv *privptr = dev->priv; |
| 538 | __u16 offset = 0; |
| 539 | |
| 540 | skb_put(pskb, NETIUCV_HDRLEN); |
| 541 | pskb->dev = dev; |
| 542 | pskb->ip_summed = CHECKSUM_NONE; |
| 543 | pskb->protocol = ntohs(ETH_P_IP); |
| 544 | |
| 545 | while (1) { |
| 546 | struct sk_buff *skb; |
| 547 | ll_header *header = (ll_header *)pskb->data; |
| 548 | |
| 549 | if (!header->next) |
| 550 | break; |
| 551 | |
| 552 | skb_pull(pskb, NETIUCV_HDRLEN); |
| 553 | header->next -= offset; |
| 554 | offset += header->next; |
| 555 | header->next -= NETIUCV_HDRLEN; |
| 556 | if (skb_tailroom(pskb) < header->next) { |
| 557 | PRINT_WARN("%s: Illegal next field in iucv header: " |
| 558 | "%d > %d\n", |
| 559 | dev->name, header->next, skb_tailroom(pskb)); |
| 560 | IUCV_DBF_TEXT_(data, 2, "Illegal next field: %d > %d\n", |
| 561 | header->next, skb_tailroom(pskb)); |
| 562 | return; |
| 563 | } |
| 564 | skb_put(pskb, header->next); |
| 565 | pskb->mac.raw = pskb->data; |
| 566 | skb = dev_alloc_skb(pskb->len); |
| 567 | if (!skb) { |
| 568 | PRINT_WARN("%s Out of memory in netiucv_unpack_skb\n", |
| 569 | dev->name); |
| 570 | IUCV_DBF_TEXT(data, 2, |
| 571 | "Out of memory in netiucv_unpack_skb\n"); |
| 572 | privptr->stats.rx_dropped++; |
| 573 | return; |
| 574 | } |
| 575 | memcpy(skb_put(skb, pskb->len), pskb->data, pskb->len); |
| 576 | skb->mac.raw = skb->data; |
| 577 | skb->dev = pskb->dev; |
| 578 | skb->protocol = pskb->protocol; |
| 579 | pskb->ip_summed = CHECKSUM_UNNECESSARY; |
| 580 | /* |
| 581 | * Since receiving is always initiated from a tasklet (in iucv.c), |
| 582 | * we must use netif_rx_ni() instead of netif_rx() |
| 583 | */ |
| 584 | netif_rx_ni(skb); |
| 585 | dev->last_rx = jiffies; |
| 586 | privptr->stats.rx_packets++; |
| 587 | privptr->stats.rx_bytes += skb->len; |
| 588 | skb_pull(pskb, header->next); |
| 589 | skb_put(pskb, NETIUCV_HDRLEN); |
| 590 | } |
| 591 | } |
| 592 | |
| 593 | static void |
| 594 | conn_action_rx(fsm_instance *fi, int event, void *arg) |
| 595 | { |
| 596 | struct iucv_event *ev = (struct iucv_event *)arg; |
| 597 | struct iucv_connection *conn = ev->conn; |
| 598 | iucv_MessagePending *eib = (iucv_MessagePending *)ev->data; |
| 599 | struct netiucv_priv *privptr =(struct netiucv_priv *)conn->netdev->priv; |
| 600 | |
| 601 | __u32 msglen = eib->ln1msg2.ipbfln1f; |
| 602 | int rc; |
| 603 | |
| 604 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
| 605 | |
| 606 | if (!conn->netdev) { |
| 607 | /* FRITZ: How to tell iucv LL to drop the msg? */ |
| 608 | PRINT_WARN("Received data for unlinked connection\n"); |
| 609 | IUCV_DBF_TEXT(data, 2, |
| 610 | "Received data for unlinked connection\n"); |
| 611 | return; |
| 612 | } |
| 613 | if (msglen > conn->max_buffsize) { |
| 614 | /* FRITZ: How to tell iucv LL to drop the msg? */ |
| 615 | privptr->stats.rx_dropped++; |
| 616 | PRINT_WARN("msglen %d > max_buffsize %d\n", |
| 617 | msglen, conn->max_buffsize); |
| 618 | IUCV_DBF_TEXT_(data, 2, "msglen %d > max_buffsize %d\n", |
| 619 | msglen, conn->max_buffsize); |
| 620 | return; |
| 621 | } |
| 622 | conn->rx_buff->data = conn->rx_buff->tail = conn->rx_buff->head; |
| 623 | conn->rx_buff->len = 0; |
| 624 | rc = iucv_receive(conn->pathid, eib->ipmsgid, eib->iptrgcls, |
| 625 | conn->rx_buff->data, msglen, NULL, NULL, NULL); |
| 626 | if (rc || msglen < 5) { |
| 627 | privptr->stats.rx_errors++; |
| 628 | PRINT_WARN("iucv_receive returned %08x\n", rc); |
| 629 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_receive\n", rc); |
| 630 | return; |
| 631 | } |
| 632 | netiucv_unpack_skb(conn, conn->rx_buff); |
| 633 | } |
| 634 | |
| 635 | static void |
| 636 | conn_action_txdone(fsm_instance *fi, int event, void *arg) |
| 637 | { |
| 638 | struct iucv_event *ev = (struct iucv_event *)arg; |
| 639 | struct iucv_connection *conn = ev->conn; |
| 640 | iucv_MessageComplete *eib = (iucv_MessageComplete *)ev->data; |
| 641 | struct netiucv_priv *privptr = NULL; |
| 642 | /* Shut up, gcc! skb is always below 2G. */ |
| 643 | __u32 single_flag = eib->ipmsgtag; |
| 644 | __u32 txbytes = 0; |
| 645 | __u32 txpackets = 0; |
| 646 | __u32 stat_maxcq = 0; |
| 647 | struct sk_buff *skb; |
| 648 | unsigned long saveflags; |
| 649 | ll_header header; |
| 650 | |
| 651 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
| 652 | |
| 653 | if (conn && conn->netdev && conn->netdev->priv) |
| 654 | privptr = (struct netiucv_priv *)conn->netdev->priv; |
| 655 | conn->prof.tx_pending--; |
| 656 | if (single_flag) { |
| 657 | if ((skb = skb_dequeue(&conn->commit_queue))) { |
| 658 | atomic_dec(&skb->users); |
| 659 | dev_kfree_skb_any(skb); |
| 660 | if (privptr) { |
| 661 | privptr->stats.tx_packets++; |
| 662 | privptr->stats.tx_bytes += |
| 663 | (skb->len - NETIUCV_HDRLEN |
| 664 | - NETIUCV_HDRLEN); |
| 665 | } |
| 666 | } |
| 667 | } |
| 668 | conn->tx_buff->data = conn->tx_buff->tail = conn->tx_buff->head; |
| 669 | conn->tx_buff->len = 0; |
| 670 | spin_lock_irqsave(&conn->collect_lock, saveflags); |
| 671 | while ((skb = skb_dequeue(&conn->collect_queue))) { |
| 672 | header.next = conn->tx_buff->len + skb->len + NETIUCV_HDRLEN; |
| 673 | memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, |
| 674 | NETIUCV_HDRLEN); |
| 675 | memcpy(skb_put(conn->tx_buff, skb->len), skb->data, skb->len); |
| 676 | txbytes += skb->len; |
| 677 | txpackets++; |
| 678 | stat_maxcq++; |
| 679 | atomic_dec(&skb->users); |
| 680 | dev_kfree_skb_any(skb); |
| 681 | } |
| 682 | if (conn->collect_len > conn->prof.maxmulti) |
| 683 | conn->prof.maxmulti = conn->collect_len; |
| 684 | conn->collect_len = 0; |
| 685 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); |
| 686 | if (conn->tx_buff->len) { |
| 687 | int rc; |
| 688 | |
| 689 | header.next = 0; |
| 690 | memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, |
| 691 | NETIUCV_HDRLEN); |
| 692 | |
| 693 | conn->prof.send_stamp = xtime; |
| 694 | rc = iucv_send(conn->pathid, NULL, 0, 0, 0, 0, |
| 695 | conn->tx_buff->data, conn->tx_buff->len); |
| 696 | conn->prof.doios_multi++; |
| 697 | conn->prof.txlen += conn->tx_buff->len; |
| 698 | conn->prof.tx_pending++; |
| 699 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) |
| 700 | conn->prof.tx_max_pending = conn->prof.tx_pending; |
| 701 | if (rc) { |
| 702 | conn->prof.tx_pending--; |
| 703 | fsm_newstate(fi, CONN_STATE_IDLE); |
| 704 | if (privptr) |
| 705 | privptr->stats.tx_errors += txpackets; |
| 706 | PRINT_WARN("iucv_send returned %08x\n", rc); |
| 707 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); |
| 708 | } else { |
| 709 | if (privptr) { |
| 710 | privptr->stats.tx_packets += txpackets; |
| 711 | privptr->stats.tx_bytes += txbytes; |
| 712 | } |
| 713 | if (stat_maxcq > conn->prof.maxcqueue) |
| 714 | conn->prof.maxcqueue = stat_maxcq; |
| 715 | } |
| 716 | } else |
| 717 | fsm_newstate(fi, CONN_STATE_IDLE); |
| 718 | } |
| 719 | |
| 720 | static void |
| 721 | conn_action_connaccept(fsm_instance *fi, int event, void *arg) |
| 722 | { |
| 723 | struct iucv_event *ev = (struct iucv_event *)arg; |
| 724 | struct iucv_connection *conn = ev->conn; |
| 725 | iucv_ConnectionPending *eib = (iucv_ConnectionPending *)ev->data; |
| 726 | struct net_device *netdev = conn->netdev; |
| 727 | struct netiucv_priv *privptr = (struct netiucv_priv *)netdev->priv; |
| 728 | int rc; |
| 729 | __u16 msglimit; |
| 730 | __u8 udata[16]; |
| 731 | |
| 732 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 733 | |
| 734 | rc = iucv_accept(eib->ippathid, NETIUCV_QUEUELEN_DEFAULT, udata, 0, |
| 735 | conn->handle, conn, NULL, &msglimit); |
| 736 | if (rc) { |
| 737 | PRINT_WARN("%s: IUCV accept failed with error %d\n", |
| 738 | netdev->name, rc); |
| 739 | IUCV_DBF_TEXT_(setup, 2, "rc %d from iucv_accept", rc); |
| 740 | return; |
| 741 | } |
| 742 | fsm_newstate(fi, CONN_STATE_IDLE); |
| 743 | conn->pathid = eib->ippathid; |
| 744 | netdev->tx_queue_len = msglimit; |
| 745 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); |
| 746 | } |
| 747 | |
| 748 | static void |
| 749 | conn_action_connreject(fsm_instance *fi, int event, void *arg) |
| 750 | { |
| 751 | struct iucv_event *ev = (struct iucv_event *)arg; |
| 752 | struct iucv_connection *conn = ev->conn; |
| 753 | struct net_device *netdev = conn->netdev; |
| 754 | iucv_ConnectionPending *eib = (iucv_ConnectionPending *)ev->data; |
| 755 | __u8 udata[16]; |
| 756 | |
| 757 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 758 | |
| 759 | iucv_sever(eib->ippathid, udata); |
| 760 | if (eib->ippathid != conn->pathid) { |
| 761 | PRINT_INFO("%s: IR Connection Pending; " |
| 762 | "pathid %d does not match original pathid %d\n", |
| 763 | netdev->name, eib->ippathid, conn->pathid); |
| 764 | IUCV_DBF_TEXT_(data, 2, |
| 765 | "connreject: IR pathid %d, conn. pathid %d\n", |
| 766 | eib->ippathid, conn->pathid); |
| 767 | iucv_sever(conn->pathid, udata); |
| 768 | } |
| 769 | } |
| 770 | |
| 771 | static void |
| 772 | conn_action_connack(fsm_instance *fi, int event, void *arg) |
| 773 | { |
| 774 | struct iucv_event *ev = (struct iucv_event *)arg; |
| 775 | struct iucv_connection *conn = ev->conn; |
| 776 | iucv_ConnectionComplete *eib = (iucv_ConnectionComplete *)ev->data; |
| 777 | struct net_device *netdev = conn->netdev; |
| 778 | struct netiucv_priv *privptr = (struct netiucv_priv *)netdev->priv; |
| 779 | |
| 780 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 781 | |
| 782 | fsm_deltimer(&conn->timer); |
| 783 | fsm_newstate(fi, CONN_STATE_IDLE); |
| 784 | if (eib->ippathid != conn->pathid) { |
| 785 | PRINT_INFO("%s: IR Connection Complete; " |
| 786 | "pathid %d does not match original pathid %d\n", |
| 787 | netdev->name, eib->ippathid, conn->pathid); |
| 788 | IUCV_DBF_TEXT_(data, 2, |
| 789 | "connack: IR pathid %d, conn. pathid %d\n", |
| 790 | eib->ippathid, conn->pathid); |
| 791 | conn->pathid = eib->ippathid; |
| 792 | } |
| 793 | netdev->tx_queue_len = eib->ipmsglim; |
| 794 | fsm_event(privptr->fsm, DEV_EVENT_CONUP, netdev); |
| 795 | } |
| 796 | |
| 797 | static void |
| 798 | conn_action_conntimsev(fsm_instance *fi, int event, void *arg) |
| 799 | { |
| 800 | struct iucv_connection *conn = (struct iucv_connection *)arg; |
| 801 | __u8 udata[16]; |
| 802 | |
| 803 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 804 | |
| 805 | fsm_deltimer(&conn->timer); |
| 806 | iucv_sever(conn->pathid, udata); |
| 807 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
| 808 | } |
| 809 | |
| 810 | static void |
| 811 | conn_action_connsever(fsm_instance *fi, int event, void *arg) |
| 812 | { |
| 813 | struct iucv_event *ev = (struct iucv_event *)arg; |
| 814 | struct iucv_connection *conn = ev->conn; |
| 815 | struct net_device *netdev = conn->netdev; |
| 816 | struct netiucv_priv *privptr = (struct netiucv_priv *)netdev->priv; |
| 817 | __u8 udata[16]; |
| 818 | |
| 819 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 820 | |
| 821 | fsm_deltimer(&conn->timer); |
| 822 | iucv_sever(conn->pathid, udata); |
| 823 | PRINT_INFO("%s: Remote dropped connection\n", netdev->name); |
| 824 | IUCV_DBF_TEXT(data, 2, |
| 825 | "conn_action_connsever: Remote dropped connection\n"); |
| 826 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
| 827 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); |
| 828 | } |
| 829 | |
| 830 | static void |
| 831 | conn_action_start(fsm_instance *fi, int event, void *arg) |
| 832 | { |
| 833 | struct iucv_event *ev = (struct iucv_event *)arg; |
| 834 | struct iucv_connection *conn = ev->conn; |
| 835 | __u16 msglimit; |
| 836 | int rc; |
| 837 | |
| 838 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 839 | |
| 840 | if (!conn->handle) { |
| 841 | IUCV_DBF_TEXT(trace, 5, "calling iucv_register_program\n"); |
| 842 | conn->handle = |
| 843 | iucv_register_program(iucvMagic, conn->userid, |
| 844 | netiucv_mask, |
| 845 | &netiucv_ops, conn); |
| 846 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
| 847 | if (!conn->handle) { |
| 848 | fsm_newstate(fi, CONN_STATE_REGERR); |
| 849 | conn->handle = NULL; |
| 850 | IUCV_DBF_TEXT(setup, 2, |
| 851 | "NULL from iucv_register_program\n"); |
| 852 | return; |
| 853 | } |
| 854 | |
| 855 | PRINT_DEBUG("%s('%s'): registered successfully\n", |
| 856 | conn->netdev->name, conn->userid); |
| 857 | } |
| 858 | |
| 859 | PRINT_DEBUG("%s('%s'): connecting ...\n", |
| 860 | conn->netdev->name, conn->userid); |
| 861 | |
| 862 | /* We must set the state before calling iucv_connect because the callback |
| 863 | * handler could be called at any point after the connection request is |
| 864 | * sent */ |
| 865 | |
| 866 | fsm_newstate(fi, CONN_STATE_SETUPWAIT); |
| 867 | rc = iucv_connect(&(conn->pathid), NETIUCV_QUEUELEN_DEFAULT, iucvMagic, |
| 868 | conn->userid, iucv_host, 0, NULL, &msglimit, |
| 869 | conn->handle, conn); |
| 870 | switch (rc) { |
| 871 | case 0: |
| 872 | conn->netdev->tx_queue_len = msglimit; |
| 873 | fsm_addtimer(&conn->timer, NETIUCV_TIMEOUT_5SEC, |
| 874 | CONN_EVENT_TIMER, conn); |
| 875 | return; |
| 876 | case 11: |
| 877 | PRINT_INFO("%s: User %s is currently not available.\n", |
| 878 | conn->netdev->name, |
| 879 | netiucv_printname(conn->userid)); |
| 880 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
| 881 | return; |
| 882 | case 12: |
| 883 | PRINT_INFO("%s: User %s is currently not ready.\n", |
| 884 | conn->netdev->name, |
| 885 | netiucv_printname(conn->userid)); |
| 886 | fsm_newstate(fi, CONN_STATE_STARTWAIT); |
| 887 | return; |
| 888 | case 13: |
| 889 | PRINT_WARN("%s: Too many IUCV connections.\n", |
| 890 | conn->netdev->name); |
| 891 | fsm_newstate(fi, CONN_STATE_CONNERR); |
| 892 | break; |
| 893 | case 14: |
| 894 | PRINT_WARN( |
| 895 | "%s: User %s has too many IUCV connections.\n", |
| 896 | conn->netdev->name, |
| 897 | netiucv_printname(conn->userid)); |
| 898 | fsm_newstate(fi, CONN_STATE_CONNERR); |
| 899 | break; |
| 900 | case 15: |
| 901 | PRINT_WARN( |
| 902 | "%s: No IUCV authorization in CP directory.\n", |
| 903 | conn->netdev->name); |
| 904 | fsm_newstate(fi, CONN_STATE_CONNERR); |
| 905 | break; |
| 906 | default: |
| 907 | PRINT_WARN("%s: iucv_connect returned error %d\n", |
| 908 | conn->netdev->name, rc); |
| 909 | fsm_newstate(fi, CONN_STATE_CONNERR); |
| 910 | break; |
| 911 | } |
| 912 | IUCV_DBF_TEXT_(setup, 5, "iucv_connect rc is %d\n", rc); |
| 913 | IUCV_DBF_TEXT(trace, 5, "calling iucv_unregister_program\n"); |
| 914 | iucv_unregister_program(conn->handle); |
| 915 | conn->handle = NULL; |
| 916 | } |
| 917 | |
| 918 | static void |
| 919 | netiucv_purge_skb_queue(struct sk_buff_head *q) |
| 920 | { |
| 921 | struct sk_buff *skb; |
| 922 | |
| 923 | while ((skb = skb_dequeue(q))) { |
| 924 | atomic_dec(&skb->users); |
| 925 | dev_kfree_skb_any(skb); |
| 926 | } |
| 927 | } |
| 928 | |
| 929 | static void |
| 930 | conn_action_stop(fsm_instance *fi, int event, void *arg) |
| 931 | { |
| 932 | struct iucv_event *ev = (struct iucv_event *)arg; |
| 933 | struct iucv_connection *conn = ev->conn; |
| 934 | struct net_device *netdev = conn->netdev; |
| 935 | struct netiucv_priv *privptr = (struct netiucv_priv *)netdev->priv; |
| 936 | |
| 937 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 938 | |
| 939 | fsm_deltimer(&conn->timer); |
| 940 | fsm_newstate(fi, CONN_STATE_STOPPED); |
| 941 | netiucv_purge_skb_queue(&conn->collect_queue); |
| 942 | if (conn->handle) |
| 943 | IUCV_DBF_TEXT(trace, 5, "calling iucv_unregister_program\n"); |
| 944 | iucv_unregister_program(conn->handle); |
| 945 | conn->handle = NULL; |
| 946 | netiucv_purge_skb_queue(&conn->commit_queue); |
| 947 | fsm_event(privptr->fsm, DEV_EVENT_CONDOWN, netdev); |
| 948 | } |
| 949 | |
| 950 | static void |
| 951 | conn_action_inval(fsm_instance *fi, int event, void *arg) |
| 952 | { |
| 953 | struct iucv_event *ev = (struct iucv_event *)arg; |
| 954 | struct iucv_connection *conn = ev->conn; |
| 955 | struct net_device *netdev = conn->netdev; |
| 956 | |
| 957 | PRINT_WARN("%s: Cannot connect without username\n", |
| 958 | netdev->name); |
| 959 | IUCV_DBF_TEXT(data, 2, "conn_action_inval called\n"); |
| 960 | } |
| 961 | |
| 962 | static const fsm_node conn_fsm[] = { |
| 963 | { CONN_STATE_INVALID, CONN_EVENT_START, conn_action_inval }, |
| 964 | { CONN_STATE_STOPPED, CONN_EVENT_START, conn_action_start }, |
| 965 | |
| 966 | { CONN_STATE_STOPPED, CONN_EVENT_STOP, conn_action_stop }, |
| 967 | { CONN_STATE_STARTWAIT, CONN_EVENT_STOP, conn_action_stop }, |
| 968 | { CONN_STATE_SETUPWAIT, CONN_EVENT_STOP, conn_action_stop }, |
| 969 | { CONN_STATE_IDLE, CONN_EVENT_STOP, conn_action_stop }, |
| 970 | { CONN_STATE_TX, CONN_EVENT_STOP, conn_action_stop }, |
| 971 | { CONN_STATE_REGERR, CONN_EVENT_STOP, conn_action_stop }, |
| 972 | { CONN_STATE_CONNERR, CONN_EVENT_STOP, conn_action_stop }, |
| 973 | |
| 974 | { CONN_STATE_STOPPED, CONN_EVENT_CONN_REQ, conn_action_connreject }, |
| 975 | { CONN_STATE_STARTWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, |
| 976 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REQ, conn_action_connaccept }, |
| 977 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REQ, conn_action_connreject }, |
| 978 | { CONN_STATE_TX, CONN_EVENT_CONN_REQ, conn_action_connreject }, |
| 979 | |
| 980 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_ACK, conn_action_connack }, |
| 981 | { CONN_STATE_SETUPWAIT, CONN_EVENT_TIMER, conn_action_conntimsev }, |
| 982 | |
| 983 | { CONN_STATE_SETUPWAIT, CONN_EVENT_CONN_REJ, conn_action_connsever }, |
| 984 | { CONN_STATE_IDLE, CONN_EVENT_CONN_REJ, conn_action_connsever }, |
| 985 | { CONN_STATE_TX, CONN_EVENT_CONN_REJ, conn_action_connsever }, |
| 986 | |
| 987 | { CONN_STATE_IDLE, CONN_EVENT_RX, conn_action_rx }, |
| 988 | { CONN_STATE_TX, CONN_EVENT_RX, conn_action_rx }, |
| 989 | |
| 990 | { CONN_STATE_TX, CONN_EVENT_TXDONE, conn_action_txdone }, |
| 991 | { CONN_STATE_IDLE, CONN_EVENT_TXDONE, conn_action_txdone }, |
| 992 | }; |
| 993 | |
| 994 | static const int CONN_FSM_LEN = sizeof(conn_fsm) / sizeof(fsm_node); |
| 995 | |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 996 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | /** |
| 998 | * Actions for interface - statemachine. |
| 999 | *****************************************************************************/ |
| 1000 | |
| 1001 | /** |
| 1002 | * Startup connection by sending CONN_EVENT_START to it. |
| 1003 | * |
| 1004 | * @param fi An instance of an interface statemachine. |
| 1005 | * @param event The event, just happened. |
| 1006 | * @param arg Generic pointer, casted from struct net_device * upon call. |
| 1007 | */ |
| 1008 | static void |
| 1009 | dev_action_start(fsm_instance *fi, int event, void *arg) |
| 1010 | { |
| 1011 | struct net_device *dev = (struct net_device *)arg; |
| 1012 | struct netiucv_priv *privptr = dev->priv; |
| 1013 | struct iucv_event ev; |
| 1014 | |
| 1015 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 1016 | |
| 1017 | ev.conn = privptr->conn; |
| 1018 | fsm_newstate(fi, DEV_STATE_STARTWAIT); |
| 1019 | fsm_event(privptr->conn->fsm, CONN_EVENT_START, &ev); |
| 1020 | } |
| 1021 | |
| 1022 | /** |
| 1023 | * Shutdown connection by sending CONN_EVENT_STOP to it. |
| 1024 | * |
| 1025 | * @param fi An instance of an interface statemachine. |
| 1026 | * @param event The event, just happened. |
| 1027 | * @param arg Generic pointer, casted from struct net_device * upon call. |
| 1028 | */ |
| 1029 | static void |
| 1030 | dev_action_stop(fsm_instance *fi, int event, void *arg) |
| 1031 | { |
| 1032 | struct net_device *dev = (struct net_device *)arg; |
| 1033 | struct netiucv_priv *privptr = dev->priv; |
| 1034 | struct iucv_event ev; |
| 1035 | |
| 1036 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 1037 | |
| 1038 | ev.conn = privptr->conn; |
| 1039 | |
| 1040 | fsm_newstate(fi, DEV_STATE_STOPWAIT); |
| 1041 | fsm_event(privptr->conn->fsm, CONN_EVENT_STOP, &ev); |
| 1042 | } |
| 1043 | |
| 1044 | /** |
| 1045 | * Called from connection statemachine |
| 1046 | * when a connection is up and running. |
| 1047 | * |
| 1048 | * @param fi An instance of an interface statemachine. |
| 1049 | * @param event The event, just happened. |
| 1050 | * @param arg Generic pointer, casted from struct net_device * upon call. |
| 1051 | */ |
| 1052 | static void |
| 1053 | dev_action_connup(fsm_instance *fi, int event, void *arg) |
| 1054 | { |
| 1055 | struct net_device *dev = (struct net_device *)arg; |
| 1056 | struct netiucv_priv *privptr = dev->priv; |
| 1057 | |
| 1058 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 1059 | |
| 1060 | switch (fsm_getstate(fi)) { |
| 1061 | case DEV_STATE_STARTWAIT: |
| 1062 | fsm_newstate(fi, DEV_STATE_RUNNING); |
| 1063 | PRINT_INFO("%s: connected with remote side %s\n", |
| 1064 | dev->name, privptr->conn->userid); |
| 1065 | IUCV_DBF_TEXT(setup, 3, |
| 1066 | "connection is up and running\n"); |
| 1067 | break; |
| 1068 | case DEV_STATE_STOPWAIT: |
| 1069 | PRINT_INFO( |
| 1070 | "%s: got connection UP event during shutdown!\n", |
| 1071 | dev->name); |
| 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 | { |
| 1089 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 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 }, |
| 1113 | { DEV_STATE_RUNNING, DEV_EVENT_CONUP, fsm_action_nop }, |
| 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 | */ |
| 1129 | static int |
| 1130 | netiucv_transmit_skb(struct iucv_connection *conn, struct sk_buff *skb) { |
| 1131 | unsigned long saveflags; |
| 1132 | ll_header header; |
| 1133 | int rc = 0; |
| 1134 | |
| 1135 | if (fsm_getstate(conn->fsm) != CONN_STATE_IDLE) { |
| 1136 | int l = skb->len + NETIUCV_HDRLEN; |
| 1137 | |
| 1138 | spin_lock_irqsave(&conn->collect_lock, saveflags); |
| 1139 | if (conn->collect_len + l > |
| 1140 | (conn->max_buffsize - NETIUCV_HDRLEN)) { |
| 1141 | rc = -EBUSY; |
| 1142 | IUCV_DBF_TEXT(data, 2, |
| 1143 | "EBUSY from netiucv_transmit_skb\n"); |
| 1144 | } else { |
| 1145 | atomic_inc(&skb->users); |
| 1146 | skb_queue_tail(&conn->collect_queue, skb); |
| 1147 | conn->collect_len += l; |
| 1148 | } |
| 1149 | spin_unlock_irqrestore(&conn->collect_lock, saveflags); |
| 1150 | } else { |
| 1151 | struct sk_buff *nskb = skb; |
| 1152 | /** |
| 1153 | * Copy the skb to a new allocated skb in lowmem only if the |
| 1154 | * data is located above 2G in memory or tailroom is < 2. |
| 1155 | */ |
| 1156 | unsigned long hi = |
| 1157 | ((unsigned long)(skb->tail + NETIUCV_HDRLEN)) >> 31; |
| 1158 | int copied = 0; |
| 1159 | if (hi || (skb_tailroom(skb) < 2)) { |
| 1160 | nskb = alloc_skb(skb->len + NETIUCV_HDRLEN + |
| 1161 | NETIUCV_HDRLEN, GFP_ATOMIC | GFP_DMA); |
| 1162 | if (!nskb) { |
| 1163 | PRINT_WARN("%s: Could not allocate tx_skb\n", |
| 1164 | conn->netdev->name); |
| 1165 | IUCV_DBF_TEXT(data, 2, "alloc_skb failed\n"); |
| 1166 | rc = -ENOMEM; |
| 1167 | return rc; |
| 1168 | } else { |
| 1169 | skb_reserve(nskb, NETIUCV_HDRLEN); |
| 1170 | memcpy(skb_put(nskb, skb->len), |
| 1171 | skb->data, skb->len); |
| 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; |
| 1181 | memcpy(skb_put(nskb, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN); |
| 1182 | |
| 1183 | fsm_newstate(conn->fsm, CONN_STATE_TX); |
| 1184 | conn->prof.send_stamp = xtime; |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 1185 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | rc = iucv_send(conn->pathid, NULL, 0, 0, 1 /* single_flag */, |
| 1187 | 0, nskb->data, nskb->len); |
| 1188 | /* Shut up, gcc! nskb is always below 2G. */ |
| 1189 | conn->prof.doios_single++; |
| 1190 | conn->prof.txlen += skb->len; |
| 1191 | conn->prof.tx_pending++; |
| 1192 | if (conn->prof.tx_pending > conn->prof.tx_max_pending) |
| 1193 | conn->prof.tx_max_pending = conn->prof.tx_pending; |
| 1194 | if (rc) { |
| 1195 | struct netiucv_priv *privptr; |
| 1196 | fsm_newstate(conn->fsm, CONN_STATE_IDLE); |
| 1197 | conn->prof.tx_pending--; |
| 1198 | privptr = (struct netiucv_priv *)conn->netdev->priv; |
| 1199 | if (privptr) |
| 1200 | privptr->stats.tx_errors++; |
| 1201 | if (copied) |
| 1202 | dev_kfree_skb(nskb); |
| 1203 | else { |
| 1204 | /** |
| 1205 | * Remove our headers. They get added |
| 1206 | * again on retransmit. |
| 1207 | */ |
| 1208 | skb_pull(skb, NETIUCV_HDRLEN); |
| 1209 | skb_trim(skb, skb->len - NETIUCV_HDRLEN); |
| 1210 | } |
| 1211 | PRINT_WARN("iucv_send returned %08x\n", rc); |
| 1212 | IUCV_DBF_TEXT_(data, 2, "rc %d from iucv_send\n", rc); |
| 1213 | } else { |
| 1214 | if (copied) |
| 1215 | dev_kfree_skb(skb); |
| 1216 | atomic_inc(&nskb->users); |
| 1217 | skb_queue_tail(&conn->commit_queue, nskb); |
| 1218 | } |
| 1219 | } |
| 1220 | |
| 1221 | return rc; |
| 1222 | } |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 1223 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | /** |
| 1225 | * Interface API for upper network layers |
| 1226 | *****************************************************************************/ |
| 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 | */ |
| 1236 | static int |
| 1237 | netiucv_open(struct net_device *dev) { |
| 1238 | fsm_event(((struct netiucv_priv *)dev->priv)->fsm, DEV_EVENT_START,dev); |
| 1239 | return 0; |
| 1240 | } |
| 1241 | |
| 1242 | /** |
| 1243 | * Close an interface. |
| 1244 | * Called from generic network layer when ifconfig down is run. |
| 1245 | * |
| 1246 | * @param dev Pointer to interface struct. |
| 1247 | * |
| 1248 | * @return 0 on success, -ERRNO on failure. (Never fails.) |
| 1249 | */ |
| 1250 | static int |
| 1251 | netiucv_close(struct net_device *dev) { |
| 1252 | fsm_event(((struct netiucv_priv *)dev->priv)->fsm, DEV_EVENT_STOP, dev); |
| 1253 | return 0; |
| 1254 | } |
| 1255 | |
| 1256 | /** |
| 1257 | * Start transmission of a packet. |
| 1258 | * Called from generic network device layer. |
| 1259 | * |
| 1260 | * @param skb Pointer to buffer containing the packet. |
| 1261 | * @param dev Pointer to interface struct. |
| 1262 | * |
| 1263 | * @return 0 if packet consumed, !0 if packet rejected. |
| 1264 | * Note: If we return !0, then the packet is free'd by |
| 1265 | * the generic network layer. |
| 1266 | */ |
| 1267 | static int netiucv_tx(struct sk_buff *skb, struct net_device *dev) |
| 1268 | { |
| 1269 | int rc = 0; |
| 1270 | struct netiucv_priv *privptr = dev->priv; |
| 1271 | |
| 1272 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
| 1273 | /** |
| 1274 | * Some sanity checks ... |
| 1275 | */ |
| 1276 | if (skb == NULL) { |
| 1277 | PRINT_WARN("%s: NULL sk_buff passed\n", dev->name); |
| 1278 | IUCV_DBF_TEXT(data, 2, "netiucv_tx: skb is NULL\n"); |
| 1279 | privptr->stats.tx_dropped++; |
| 1280 | return 0; |
| 1281 | } |
| 1282 | if (skb_headroom(skb) < NETIUCV_HDRLEN) { |
| 1283 | PRINT_WARN("%s: Got sk_buff with head room < %ld bytes\n", |
| 1284 | dev->name, NETIUCV_HDRLEN); |
| 1285 | IUCV_DBF_TEXT(data, 2, |
| 1286 | "netiucv_tx: skb_headroom < NETIUCV_HDRLEN\n"); |
| 1287 | dev_kfree_skb(skb); |
| 1288 | privptr->stats.tx_dropped++; |
| 1289 | return 0; |
| 1290 | } |
| 1291 | |
| 1292 | /** |
| 1293 | * If connection is not running, try to restart it |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 1294 | * and throw away packet. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | */ |
| 1296 | if (fsm_getstate(privptr->fsm) != DEV_STATE_RUNNING) { |
| 1297 | fsm_event(privptr->fsm, DEV_EVENT_START, dev); |
| 1298 | dev_kfree_skb(skb); |
| 1299 | privptr->stats.tx_dropped++; |
| 1300 | privptr->stats.tx_errors++; |
| 1301 | privptr->stats.tx_carrier_errors++; |
| 1302 | return 0; |
| 1303 | } |
| 1304 | |
| 1305 | if (netiucv_test_and_set_busy(dev)) { |
| 1306 | IUCV_DBF_TEXT(data, 2, "EBUSY from netiucv_tx\n"); |
| 1307 | return -EBUSY; |
| 1308 | } |
| 1309 | dev->trans_start = jiffies; |
| 1310 | if (netiucv_transmit_skb(privptr->conn, skb)) |
| 1311 | rc = 1; |
| 1312 | netiucv_clear_busy(dev); |
| 1313 | return rc; |
| 1314 | } |
| 1315 | |
| 1316 | /** |
| 1317 | * Returns interface statistics of a device. |
| 1318 | * |
| 1319 | * @param dev Pointer to interface struct. |
| 1320 | * |
| 1321 | * @return Pointer to stats struct of this interface. |
| 1322 | */ |
| 1323 | static struct net_device_stats * |
| 1324 | netiucv_stats (struct net_device * dev) |
| 1325 | { |
| 1326 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); |
| 1327 | return &((struct netiucv_priv *)dev->priv)->stats; |
| 1328 | } |
| 1329 | |
| 1330 | /** |
| 1331 | * Sets MTU of an interface. |
| 1332 | * |
| 1333 | * @param dev Pointer to interface struct. |
| 1334 | * @param new_mtu The new MTU to use for this interface. |
| 1335 | * |
| 1336 | * @return 0 on success, -EINVAL if MTU is out of valid range. |
| 1337 | * (valid range is 576 .. NETIUCV_MTU_MAX). |
| 1338 | */ |
| 1339 | static int |
| 1340 | netiucv_change_mtu (struct net_device * dev, int new_mtu) |
| 1341 | { |
| 1342 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 1343 | if ((new_mtu < 576) || (new_mtu > NETIUCV_MTU_MAX)) { |
| 1344 | IUCV_DBF_TEXT(setup, 2, "given MTU out of valid range\n"); |
| 1345 | return -EINVAL; |
| 1346 | } |
| 1347 | dev->mtu = new_mtu; |
| 1348 | return 0; |
| 1349 | } |
| 1350 | |
| 1351 | /** |
| 1352 | * attributes in sysfs |
| 1353 | *****************************************************************************/ |
| 1354 | |
| 1355 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1356 | user_show (struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | { |
| 1358 | struct netiucv_priv *priv = dev->driver_data; |
| 1359 | |
| 1360 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); |
| 1361 | return sprintf(buf, "%s\n", netiucv_printname(priv->conn->userid)); |
| 1362 | } |
| 1363 | |
| 1364 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1365 | user_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | { |
| 1367 | struct netiucv_priv *priv = dev->driver_data; |
| 1368 | struct net_device *ndev = priv->conn->netdev; |
| 1369 | char *p; |
| 1370 | char *tmp; |
| 1371 | char username[10]; |
| 1372 | int i; |
| 1373 | |
| 1374 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 1375 | if (count>9) { |
| 1376 | PRINT_WARN("netiucv: username too long (%d)!\n", (int)count); |
| 1377 | IUCV_DBF_TEXT_(setup, 2, |
| 1378 | "%d is length of username\n", (int)count); |
| 1379 | return -EINVAL; |
| 1380 | } |
| 1381 | |
| 1382 | tmp = strsep((char **) &buf, "\n"); |
| 1383 | for (i=0, p=tmp; i<8 && *p; i++, p++) { |
| 1384 | if (isalnum(*p) || (*p == '$')) |
| 1385 | username[i]= *p; |
| 1386 | else if (*p == '\n') { |
| 1387 | /* trailing lf, grr */ |
| 1388 | break; |
| 1389 | } else { |
| 1390 | PRINT_WARN("netiucv: Invalid char %c in username!\n", |
| 1391 | *p); |
| 1392 | IUCV_DBF_TEXT_(setup, 2, |
| 1393 | "username: invalid character %c\n", |
| 1394 | *p); |
| 1395 | return -EINVAL; |
| 1396 | } |
| 1397 | } |
| 1398 | while (i<9) |
| 1399 | username[i++] = ' '; |
| 1400 | username[9] = '\0'; |
| 1401 | |
| 1402 | if (memcmp(username, priv->conn->userid, 8)) { |
| 1403 | /* username changed */ |
| 1404 | if (ndev->flags & (IFF_UP | IFF_RUNNING)) { |
| 1405 | PRINT_WARN( |
| 1406 | "netiucv: device %s active, connected to %s\n", |
| 1407 | dev->bus_id, priv->conn->userid); |
| 1408 | PRINT_WARN("netiucv: user cannot be updated\n"); |
| 1409 | IUCV_DBF_TEXT(setup, 2, "user_write: device active\n"); |
| 1410 | return -EBUSY; |
| 1411 | } |
| 1412 | } |
| 1413 | memcpy(priv->conn->userid, username, 9); |
| 1414 | |
| 1415 | return count; |
| 1416 | |
| 1417 | } |
| 1418 | |
| 1419 | static DEVICE_ATTR(user, 0644, user_show, user_write); |
| 1420 | |
| 1421 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1422 | buffer_show (struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1423 | { |
| 1424 | struct netiucv_priv *priv = dev->driver_data; |
| 1425 | |
| 1426 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); |
| 1427 | return sprintf(buf, "%d\n", priv->conn->max_buffsize); |
| 1428 | } |
| 1429 | |
| 1430 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1431 | buffer_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | { |
| 1433 | struct netiucv_priv *priv = dev->driver_data; |
| 1434 | struct net_device *ndev = priv->conn->netdev; |
| 1435 | char *e; |
| 1436 | int bs1; |
| 1437 | |
| 1438 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 1439 | if (count >= 39) |
| 1440 | return -EINVAL; |
| 1441 | |
| 1442 | bs1 = simple_strtoul(buf, &e, 0); |
| 1443 | |
| 1444 | if (e && (!isspace(*e))) { |
| 1445 | PRINT_WARN("netiucv: Invalid character in buffer!\n"); |
| 1446 | IUCV_DBF_TEXT_(setup, 2, "buffer_write: invalid char %c\n", *e); |
| 1447 | return -EINVAL; |
| 1448 | } |
| 1449 | if (bs1 > NETIUCV_BUFSIZE_MAX) { |
| 1450 | PRINT_WARN("netiucv: Given buffer size %d too large.\n", |
| 1451 | bs1); |
| 1452 | IUCV_DBF_TEXT_(setup, 2, |
| 1453 | "buffer_write: buffer size %d too large\n", |
| 1454 | bs1); |
| 1455 | return -EINVAL; |
| 1456 | } |
| 1457 | if ((ndev->flags & IFF_RUNNING) && |
| 1458 | (bs1 < (ndev->mtu + NETIUCV_HDRLEN + 2))) { |
| 1459 | PRINT_WARN("netiucv: Given buffer size %d too small.\n", |
| 1460 | bs1); |
| 1461 | IUCV_DBF_TEXT_(setup, 2, |
| 1462 | "buffer_write: buffer size %d too small\n", |
| 1463 | bs1); |
| 1464 | return -EINVAL; |
| 1465 | } |
| 1466 | if (bs1 < (576 + NETIUCV_HDRLEN + NETIUCV_HDRLEN)) { |
| 1467 | PRINT_WARN("netiucv: Given buffer size %d too small.\n", |
| 1468 | bs1); |
| 1469 | IUCV_DBF_TEXT_(setup, 2, |
| 1470 | "buffer_write: buffer size %d too small\n", |
| 1471 | bs1); |
| 1472 | return -EINVAL; |
| 1473 | } |
| 1474 | |
| 1475 | priv->conn->max_buffsize = bs1; |
| 1476 | if (!(ndev->flags & IFF_RUNNING)) |
| 1477 | ndev->mtu = bs1 - NETIUCV_HDRLEN - NETIUCV_HDRLEN; |
| 1478 | |
| 1479 | return count; |
| 1480 | |
| 1481 | } |
| 1482 | |
| 1483 | static DEVICE_ATTR(buffer, 0644, buffer_show, buffer_write); |
| 1484 | |
| 1485 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1486 | dev_fsm_show (struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | { |
| 1488 | struct netiucv_priv *priv = dev->driver_data; |
| 1489 | |
| 1490 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); |
| 1491 | return sprintf(buf, "%s\n", fsm_getstate_str(priv->fsm)); |
| 1492 | } |
| 1493 | |
| 1494 | static DEVICE_ATTR(device_fsm_state, 0444, dev_fsm_show, NULL); |
| 1495 | |
| 1496 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1497 | conn_fsm_show (struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | { |
| 1499 | struct netiucv_priv *priv = dev->driver_data; |
| 1500 | |
| 1501 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); |
| 1502 | return sprintf(buf, "%s\n", fsm_getstate_str(priv->conn->fsm)); |
| 1503 | } |
| 1504 | |
| 1505 | static DEVICE_ATTR(connection_fsm_state, 0444, conn_fsm_show, NULL); |
| 1506 | |
| 1507 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1508 | maxmulti_show (struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1509 | { |
| 1510 | struct netiucv_priv *priv = dev->driver_data; |
| 1511 | |
| 1512 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); |
| 1513 | return sprintf(buf, "%ld\n", priv->conn->prof.maxmulti); |
| 1514 | } |
| 1515 | |
| 1516 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1517 | maxmulti_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | { |
| 1519 | struct netiucv_priv *priv = dev->driver_data; |
| 1520 | |
| 1521 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
| 1522 | priv->conn->prof.maxmulti = 0; |
| 1523 | return count; |
| 1524 | } |
| 1525 | |
| 1526 | static DEVICE_ATTR(max_tx_buffer_used, 0644, maxmulti_show, maxmulti_write); |
| 1527 | |
| 1528 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1529 | maxcq_show (struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1530 | { |
| 1531 | struct netiucv_priv *priv = dev->driver_data; |
| 1532 | |
| 1533 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); |
| 1534 | return sprintf(buf, "%ld\n", priv->conn->prof.maxcqueue); |
| 1535 | } |
| 1536 | |
| 1537 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1538 | maxcq_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1539 | { |
| 1540 | struct netiucv_priv *priv = dev->driver_data; |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 1541 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1542 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
| 1543 | priv->conn->prof.maxcqueue = 0; |
| 1544 | return count; |
| 1545 | } |
| 1546 | |
| 1547 | static DEVICE_ATTR(max_chained_skbs, 0644, maxcq_show, maxcq_write); |
| 1548 | |
| 1549 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1550 | sdoio_show (struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1551 | { |
| 1552 | struct netiucv_priv *priv = dev->driver_data; |
| 1553 | |
| 1554 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); |
| 1555 | return sprintf(buf, "%ld\n", priv->conn->prof.doios_single); |
| 1556 | } |
| 1557 | |
| 1558 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1559 | sdoio_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1560 | { |
| 1561 | struct netiucv_priv *priv = dev->driver_data; |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 1562 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1563 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
| 1564 | priv->conn->prof.doios_single = 0; |
| 1565 | return count; |
| 1566 | } |
| 1567 | |
| 1568 | static DEVICE_ATTR(tx_single_write_ops, 0644, sdoio_show, sdoio_write); |
| 1569 | |
| 1570 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1571 | mdoio_show (struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | { |
| 1573 | struct netiucv_priv *priv = dev->driver_data; |
| 1574 | |
| 1575 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); |
| 1576 | return sprintf(buf, "%ld\n", priv->conn->prof.doios_multi); |
| 1577 | } |
| 1578 | |
| 1579 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1580 | mdoio_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1581 | { |
| 1582 | struct netiucv_priv *priv = dev->driver_data; |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 1583 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); |
| 1585 | priv->conn->prof.doios_multi = 0; |
| 1586 | return count; |
| 1587 | } |
| 1588 | |
| 1589 | static DEVICE_ATTR(tx_multi_write_ops, 0644, mdoio_show, mdoio_write); |
| 1590 | |
| 1591 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1592 | txlen_show (struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1593 | { |
| 1594 | struct netiucv_priv *priv = dev->driver_data; |
| 1595 | |
| 1596 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); |
| 1597 | return sprintf(buf, "%ld\n", priv->conn->prof.txlen); |
| 1598 | } |
| 1599 | |
| 1600 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1601 | txlen_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1602 | { |
| 1603 | struct netiucv_priv *priv = dev->driver_data; |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 1604 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1605 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
| 1606 | priv->conn->prof.txlen = 0; |
| 1607 | return count; |
| 1608 | } |
| 1609 | |
| 1610 | static DEVICE_ATTR(netto_bytes, 0644, txlen_show, txlen_write); |
| 1611 | |
| 1612 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1613 | txtime_show (struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1614 | { |
| 1615 | struct netiucv_priv *priv = dev->driver_data; |
| 1616 | |
| 1617 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); |
| 1618 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_time); |
| 1619 | } |
| 1620 | |
| 1621 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1622 | txtime_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1623 | { |
| 1624 | struct netiucv_priv *priv = dev->driver_data; |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 1625 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1626 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
| 1627 | priv->conn->prof.tx_time = 0; |
| 1628 | return count; |
| 1629 | } |
| 1630 | |
| 1631 | static DEVICE_ATTR(max_tx_io_time, 0644, txtime_show, txtime_write); |
| 1632 | |
| 1633 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1634 | txpend_show (struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1635 | { |
| 1636 | struct netiucv_priv *priv = dev->driver_data; |
| 1637 | |
| 1638 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); |
| 1639 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_pending); |
| 1640 | } |
| 1641 | |
| 1642 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1643 | txpend_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1644 | { |
| 1645 | struct netiucv_priv *priv = dev->driver_data; |
| 1646 | |
| 1647 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
| 1648 | priv->conn->prof.tx_pending = 0; |
| 1649 | return count; |
| 1650 | } |
| 1651 | |
| 1652 | static DEVICE_ATTR(tx_pending, 0644, txpend_show, txpend_write); |
| 1653 | |
| 1654 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1655 | txmpnd_show (struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1656 | { |
| 1657 | struct netiucv_priv *priv = dev->driver_data; |
| 1658 | |
| 1659 | IUCV_DBF_TEXT(trace, 5, __FUNCTION__); |
| 1660 | return sprintf(buf, "%ld\n", priv->conn->prof.tx_max_pending); |
| 1661 | } |
| 1662 | |
| 1663 | static ssize_t |
Yani Ioannou | 3fd3c0a | 2005-05-17 06:43:27 -0400 | [diff] [blame] | 1664 | txmpnd_write (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1665 | { |
| 1666 | struct netiucv_priv *priv = dev->driver_data; |
| 1667 | |
| 1668 | IUCV_DBF_TEXT(trace, 4, __FUNCTION__); |
| 1669 | priv->conn->prof.tx_max_pending = 0; |
| 1670 | return count; |
| 1671 | } |
| 1672 | |
| 1673 | static DEVICE_ATTR(tx_max_pending, 0644, txmpnd_show, txmpnd_write); |
| 1674 | |
| 1675 | static struct attribute *netiucv_attrs[] = { |
| 1676 | &dev_attr_buffer.attr, |
| 1677 | &dev_attr_user.attr, |
| 1678 | NULL, |
| 1679 | }; |
| 1680 | |
| 1681 | static struct attribute_group netiucv_attr_group = { |
| 1682 | .attrs = netiucv_attrs, |
| 1683 | }; |
| 1684 | |
| 1685 | static struct attribute *netiucv_stat_attrs[] = { |
| 1686 | &dev_attr_device_fsm_state.attr, |
| 1687 | &dev_attr_connection_fsm_state.attr, |
| 1688 | &dev_attr_max_tx_buffer_used.attr, |
| 1689 | &dev_attr_max_chained_skbs.attr, |
| 1690 | &dev_attr_tx_single_write_ops.attr, |
| 1691 | &dev_attr_tx_multi_write_ops.attr, |
| 1692 | &dev_attr_netto_bytes.attr, |
| 1693 | &dev_attr_max_tx_io_time.attr, |
| 1694 | &dev_attr_tx_pending.attr, |
| 1695 | &dev_attr_tx_max_pending.attr, |
| 1696 | NULL, |
| 1697 | }; |
| 1698 | |
| 1699 | static struct attribute_group netiucv_stat_attr_group = { |
| 1700 | .name = "stats", |
| 1701 | .attrs = netiucv_stat_attrs, |
| 1702 | }; |
| 1703 | |
| 1704 | static inline int |
| 1705 | netiucv_add_files(struct device *dev) |
| 1706 | { |
| 1707 | int ret; |
| 1708 | |
| 1709 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 1710 | ret = sysfs_create_group(&dev->kobj, &netiucv_attr_group); |
| 1711 | if (ret) |
| 1712 | return ret; |
| 1713 | ret = sysfs_create_group(&dev->kobj, &netiucv_stat_attr_group); |
| 1714 | if (ret) |
| 1715 | sysfs_remove_group(&dev->kobj, &netiucv_attr_group); |
| 1716 | return ret; |
| 1717 | } |
| 1718 | |
| 1719 | static inline void |
| 1720 | netiucv_remove_files(struct device *dev) |
| 1721 | { |
| 1722 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 1723 | sysfs_remove_group(&dev->kobj, &netiucv_stat_attr_group); |
| 1724 | sysfs_remove_group(&dev->kobj, &netiucv_attr_group); |
| 1725 | } |
| 1726 | |
| 1727 | static int |
| 1728 | netiucv_register_device(struct net_device *ndev) |
| 1729 | { |
| 1730 | struct netiucv_priv *priv = ndev->priv; |
Eric Sesterhenn | 88abaab | 2006-03-24 03:15:31 -0800 | [diff] [blame] | 1731 | struct device *dev = kzalloc(sizeof(struct device), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1732 | int ret; |
| 1733 | |
| 1734 | |
| 1735 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 1736 | |
| 1737 | if (dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1738 | snprintf(dev->bus_id, BUS_ID_SIZE, "net%s", ndev->name); |
| 1739 | dev->bus = &iucv_bus; |
| 1740 | dev->parent = iucv_root; |
| 1741 | /* |
| 1742 | * The release function could be called after the |
| 1743 | * module has been unloaded. It's _only_ task is to |
| 1744 | * free the struct. Therefore, we specify kfree() |
| 1745 | * directly here. (Probably a little bit obfuscating |
| 1746 | * but legitime ...). |
| 1747 | */ |
| 1748 | dev->release = (void (*)(struct device *))kfree; |
| 1749 | dev->driver = &netiucv_driver; |
| 1750 | } else |
| 1751 | return -ENOMEM; |
| 1752 | |
| 1753 | ret = device_register(dev); |
| 1754 | |
| 1755 | if (ret) |
| 1756 | return ret; |
| 1757 | ret = netiucv_add_files(dev); |
| 1758 | if (ret) |
| 1759 | goto out_unreg; |
| 1760 | priv->dev = dev; |
| 1761 | dev->driver_data = priv; |
| 1762 | return 0; |
| 1763 | |
| 1764 | out_unreg: |
| 1765 | device_unregister(dev); |
| 1766 | return ret; |
| 1767 | } |
| 1768 | |
| 1769 | static void |
| 1770 | netiucv_unregister_device(struct device *dev) |
| 1771 | { |
| 1772 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 1773 | netiucv_remove_files(dev); |
| 1774 | device_unregister(dev); |
| 1775 | } |
| 1776 | |
| 1777 | /** |
| 1778 | * Allocate and initialize a new connection structure. |
| 1779 | * Add it to the list of netiucv connections; |
| 1780 | */ |
| 1781 | static struct iucv_connection * |
| 1782 | netiucv_new_connection(struct net_device *dev, char *username) |
| 1783 | { |
| 1784 | struct iucv_connection **clist = &iucv_connections; |
| 1785 | struct iucv_connection *conn = |
Eric Sesterhenn | 88abaab | 2006-03-24 03:15:31 -0800 | [diff] [blame] | 1786 | kzalloc(sizeof(struct iucv_connection), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1787 | |
| 1788 | if (conn) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | skb_queue_head_init(&conn->collect_queue); |
| 1790 | skb_queue_head_init(&conn->commit_queue); |
| 1791 | conn->max_buffsize = NETIUCV_BUFSIZE_DEFAULT; |
| 1792 | conn->netdev = dev; |
| 1793 | |
| 1794 | conn->rx_buff = alloc_skb(NETIUCV_BUFSIZE_DEFAULT, |
| 1795 | GFP_KERNEL | GFP_DMA); |
| 1796 | if (!conn->rx_buff) { |
| 1797 | kfree(conn); |
| 1798 | return NULL; |
| 1799 | } |
| 1800 | conn->tx_buff = alloc_skb(NETIUCV_BUFSIZE_DEFAULT, |
| 1801 | GFP_KERNEL | GFP_DMA); |
| 1802 | if (!conn->tx_buff) { |
| 1803 | kfree_skb(conn->rx_buff); |
| 1804 | kfree(conn); |
| 1805 | return NULL; |
| 1806 | } |
| 1807 | conn->fsm = init_fsm("netiucvconn", conn_state_names, |
| 1808 | conn_event_names, NR_CONN_STATES, |
| 1809 | NR_CONN_EVENTS, conn_fsm, CONN_FSM_LEN, |
| 1810 | GFP_KERNEL); |
| 1811 | if (!conn->fsm) { |
| 1812 | kfree_skb(conn->tx_buff); |
| 1813 | kfree_skb(conn->rx_buff); |
| 1814 | kfree(conn); |
| 1815 | return NULL; |
| 1816 | } |
| 1817 | fsm_settimer(conn->fsm, &conn->timer); |
| 1818 | fsm_newstate(conn->fsm, CONN_STATE_INVALID); |
| 1819 | |
| 1820 | if (username) { |
| 1821 | memcpy(conn->userid, username, 9); |
| 1822 | fsm_newstate(conn->fsm, CONN_STATE_STOPPED); |
| 1823 | } |
| 1824 | |
| 1825 | conn->next = *clist; |
| 1826 | *clist = conn; |
| 1827 | } |
| 1828 | return conn; |
| 1829 | } |
| 1830 | |
| 1831 | /** |
| 1832 | * Release a connection structure and remove it from the |
| 1833 | * list of netiucv connections. |
| 1834 | */ |
| 1835 | static void |
| 1836 | netiucv_remove_connection(struct iucv_connection *conn) |
| 1837 | { |
| 1838 | struct iucv_connection **clist = &iucv_connections; |
| 1839 | |
| 1840 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 1841 | if (conn == NULL) |
| 1842 | return; |
| 1843 | while (*clist) { |
| 1844 | if (*clist == conn) { |
| 1845 | *clist = conn->next; |
| 1846 | if (conn->handle) { |
| 1847 | iucv_unregister_program(conn->handle); |
| 1848 | conn->handle = NULL; |
| 1849 | } |
| 1850 | fsm_deltimer(&conn->timer); |
| 1851 | kfree_fsm(conn->fsm); |
| 1852 | kfree_skb(conn->rx_buff); |
| 1853 | kfree_skb(conn->tx_buff); |
| 1854 | return; |
| 1855 | } |
| 1856 | clist = &((*clist)->next); |
| 1857 | } |
| 1858 | } |
| 1859 | |
| 1860 | /** |
| 1861 | * Release everything of a net device. |
| 1862 | */ |
| 1863 | static void |
| 1864 | netiucv_free_netdevice(struct net_device *dev) |
| 1865 | { |
| 1866 | struct netiucv_priv *privptr; |
| 1867 | |
| 1868 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 1869 | |
| 1870 | if (!dev) |
| 1871 | return; |
| 1872 | |
| 1873 | privptr = (struct netiucv_priv *)dev->priv; |
| 1874 | if (privptr) { |
| 1875 | if (privptr->conn) |
| 1876 | netiucv_remove_connection(privptr->conn); |
| 1877 | if (privptr->fsm) |
| 1878 | kfree_fsm(privptr->fsm); |
| 1879 | privptr->conn = NULL; privptr->fsm = NULL; |
| 1880 | /* privptr gets freed by free_netdev() */ |
| 1881 | } |
| 1882 | free_netdev(dev); |
| 1883 | } |
| 1884 | |
| 1885 | /** |
| 1886 | * Initialize a net device. (Called from kernel in alloc_netdev()) |
| 1887 | */ |
| 1888 | static void |
| 1889 | netiucv_setup_netdevice(struct net_device *dev) |
| 1890 | { |
| 1891 | memset(dev->priv, 0, sizeof(struct netiucv_priv)); |
| 1892 | |
| 1893 | dev->mtu = NETIUCV_MTU_DEFAULT; |
| 1894 | dev->hard_start_xmit = netiucv_tx; |
| 1895 | dev->open = netiucv_open; |
| 1896 | dev->stop = netiucv_close; |
| 1897 | dev->get_stats = netiucv_stats; |
| 1898 | dev->change_mtu = netiucv_change_mtu; |
| 1899 | dev->destructor = netiucv_free_netdevice; |
| 1900 | dev->hard_header_len = NETIUCV_HDRLEN; |
| 1901 | dev->addr_len = 0; |
| 1902 | dev->type = ARPHRD_SLIP; |
| 1903 | dev->tx_queue_len = NETIUCV_QUEUELEN_DEFAULT; |
| 1904 | dev->flags = IFF_POINTOPOINT | IFF_NOARP; |
| 1905 | SET_MODULE_OWNER(dev); |
| 1906 | } |
| 1907 | |
| 1908 | /** |
| 1909 | * Allocate and initialize everything of a net device. |
| 1910 | */ |
| 1911 | static struct net_device * |
| 1912 | netiucv_init_netdevice(char *username) |
| 1913 | { |
| 1914 | struct netiucv_priv *privptr; |
| 1915 | struct net_device *dev; |
| 1916 | |
| 1917 | dev = alloc_netdev(sizeof(struct netiucv_priv), "iucv%d", |
| 1918 | netiucv_setup_netdevice); |
| 1919 | if (!dev) |
| 1920 | return NULL; |
| 1921 | if (dev_alloc_name(dev, dev->name) < 0) { |
| 1922 | free_netdev(dev); |
| 1923 | return NULL; |
| 1924 | } |
| 1925 | |
| 1926 | privptr = (struct netiucv_priv *)dev->priv; |
| 1927 | privptr->fsm = init_fsm("netiucvdev", dev_state_names, |
| 1928 | dev_event_names, NR_DEV_STATES, NR_DEV_EVENTS, |
| 1929 | dev_fsm, DEV_FSM_LEN, GFP_KERNEL); |
| 1930 | if (!privptr->fsm) { |
| 1931 | free_netdev(dev); |
| 1932 | return NULL; |
| 1933 | } |
| 1934 | privptr->conn = netiucv_new_connection(dev, username); |
| 1935 | if (!privptr->conn) { |
| 1936 | kfree_fsm(privptr->fsm); |
| 1937 | free_netdev(dev); |
| 1938 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_new_connection\n"); |
| 1939 | return NULL; |
| 1940 | } |
| 1941 | fsm_newstate(privptr->fsm, DEV_STATE_STOPPED); |
| 1942 | |
| 1943 | return dev; |
| 1944 | } |
| 1945 | |
| 1946 | static ssize_t |
| 1947 | conn_write(struct device_driver *drv, const char *buf, size_t count) |
| 1948 | { |
| 1949 | char *p; |
| 1950 | char username[10]; |
| 1951 | int i, ret; |
| 1952 | struct net_device *dev; |
| 1953 | |
| 1954 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 1955 | if (count>9) { |
| 1956 | PRINT_WARN("netiucv: username too long (%d)!\n", (int)count); |
| 1957 | IUCV_DBF_TEXT(setup, 2, "conn_write: too long\n"); |
| 1958 | return -EINVAL; |
| 1959 | } |
| 1960 | |
| 1961 | for (i=0, p=(char *)buf; i<8 && *p; i++, p++) { |
| 1962 | if (isalnum(*p) || (*p == '$')) |
| 1963 | username[i]= *p; |
| 1964 | else if (*p == '\n') { |
| 1965 | /* trailing lf, grr */ |
| 1966 | break; |
| 1967 | } else { |
| 1968 | PRINT_WARN("netiucv: Invalid character in username!\n"); |
| 1969 | IUCV_DBF_TEXT_(setup, 2, |
| 1970 | "conn_write: invalid character %c\n", *p); |
| 1971 | return -EINVAL; |
| 1972 | } |
| 1973 | } |
| 1974 | while (i<9) |
| 1975 | username[i++] = ' '; |
| 1976 | username[9] = '\0'; |
| 1977 | dev = netiucv_init_netdevice(username); |
| 1978 | if (!dev) { |
| 1979 | PRINT_WARN( |
| 1980 | "netiucv: Could not allocate network device structure " |
| 1981 | "for user '%s'\n", netiucv_printname(username)); |
| 1982 | IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_init_netdevice\n"); |
| 1983 | return -ENODEV; |
| 1984 | } |
| 1985 | |
| 1986 | if ((ret = netiucv_register_device(dev))) { |
| 1987 | IUCV_DBF_TEXT_(setup, 2, |
| 1988 | "ret %d from netiucv_register_device\n", ret); |
| 1989 | goto out_free_ndev; |
| 1990 | } |
| 1991 | |
| 1992 | /* sysfs magic */ |
| 1993 | SET_NETDEV_DEV(dev, |
| 1994 | (struct device*)((struct netiucv_priv*)dev->priv)->dev); |
| 1995 | |
| 1996 | if ((ret = register_netdev(dev))) { |
| 1997 | netiucv_unregister_device((struct device*) |
| 1998 | ((struct netiucv_priv*)dev->priv)->dev); |
| 1999 | goto out_free_ndev; |
| 2000 | } |
| 2001 | |
| 2002 | PRINT_INFO("%s: '%s'\n", dev->name, netiucv_printname(username)); |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 2003 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2004 | return count; |
| 2005 | |
| 2006 | out_free_ndev: |
| 2007 | PRINT_WARN("netiucv: Could not register '%s'\n", dev->name); |
| 2008 | IUCV_DBF_TEXT(setup, 2, "conn_write: could not register\n"); |
| 2009 | netiucv_free_netdevice(dev); |
| 2010 | return ret; |
| 2011 | } |
| 2012 | |
| 2013 | DRIVER_ATTR(connection, 0200, NULL, conn_write); |
| 2014 | |
| 2015 | static ssize_t |
| 2016 | remove_write (struct device_driver *drv, const char *buf, size_t count) |
| 2017 | { |
| 2018 | struct iucv_connection **clist = &iucv_connections; |
| 2019 | struct net_device *ndev; |
| 2020 | struct netiucv_priv *priv; |
| 2021 | struct device *dev; |
| 2022 | char name[IFNAMSIZ]; |
| 2023 | char *p; |
| 2024 | int i; |
| 2025 | |
| 2026 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 2027 | |
| 2028 | if (count >= IFNAMSIZ) |
| 2029 | count = IFNAMSIZ-1; |
| 2030 | |
| 2031 | for (i=0, p=(char *)buf; i<count && *p; i++, p++) { |
| 2032 | if ((*p == '\n') | (*p == ' ')) { |
| 2033 | /* trailing lf, grr */ |
| 2034 | break; |
| 2035 | } else { |
| 2036 | name[i]=*p; |
| 2037 | } |
| 2038 | } |
| 2039 | name[i] = '\0'; |
| 2040 | |
| 2041 | while (*clist) { |
| 2042 | ndev = (*clist)->netdev; |
| 2043 | priv = (struct netiucv_priv*)ndev->priv; |
| 2044 | dev = priv->dev; |
| 2045 | |
| 2046 | if (strncmp(name, ndev->name, count)) { |
| 2047 | clist = &((*clist)->next); |
| 2048 | continue; |
| 2049 | } |
| 2050 | if (ndev->flags & (IFF_UP | IFF_RUNNING)) { |
| 2051 | PRINT_WARN( |
| 2052 | "netiucv: net device %s active with peer %s\n", |
| 2053 | ndev->name, priv->conn->userid); |
| 2054 | PRINT_WARN("netiucv: %s cannot be removed\n", |
| 2055 | ndev->name); |
| 2056 | IUCV_DBF_TEXT(data, 2, "remove_write: still active\n"); |
| 2057 | return -EBUSY; |
| 2058 | } |
| 2059 | unregister_netdev(ndev); |
| 2060 | netiucv_unregister_device(dev); |
| 2061 | return count; |
| 2062 | } |
| 2063 | PRINT_WARN("netiucv: net device %s unknown\n", name); |
| 2064 | IUCV_DBF_TEXT(data, 2, "remove_write: unknown device\n"); |
| 2065 | return -EINVAL; |
| 2066 | } |
| 2067 | |
| 2068 | DRIVER_ATTR(remove, 0200, NULL, remove_write); |
| 2069 | |
| 2070 | static void |
| 2071 | netiucv_banner(void) |
| 2072 | { |
Heiko Carstens | e018ba1 | 2006-02-01 03:06:31 -0800 | [diff] [blame] | 2073 | PRINT_INFO("NETIUCV driver initialized\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2074 | } |
| 2075 | |
| 2076 | static void __exit |
| 2077 | netiucv_exit(void) |
| 2078 | { |
| 2079 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 2080 | while (iucv_connections) { |
| 2081 | struct net_device *ndev = iucv_connections->netdev; |
| 2082 | struct netiucv_priv *priv = (struct netiucv_priv*)ndev->priv; |
| 2083 | struct device *dev = priv->dev; |
| 2084 | |
| 2085 | unregister_netdev(ndev); |
| 2086 | netiucv_unregister_device(dev); |
| 2087 | } |
| 2088 | |
| 2089 | driver_remove_file(&netiucv_driver, &driver_attr_connection); |
| 2090 | driver_remove_file(&netiucv_driver, &driver_attr_remove); |
| 2091 | driver_unregister(&netiucv_driver); |
| 2092 | iucv_unregister_dbf_views(); |
| 2093 | |
| 2094 | PRINT_INFO("NETIUCV driver unloaded\n"); |
| 2095 | return; |
| 2096 | } |
| 2097 | |
| 2098 | static int __init |
| 2099 | netiucv_init(void) |
| 2100 | { |
| 2101 | int ret; |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 2102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2103 | ret = iucv_register_dbf_views(); |
| 2104 | if (ret) { |
| 2105 | PRINT_WARN("netiucv_init failed, " |
| 2106 | "iucv_register_dbf_views rc = %d\n", ret); |
| 2107 | return ret; |
| 2108 | } |
| 2109 | IUCV_DBF_TEXT(trace, 3, __FUNCTION__); |
| 2110 | ret = driver_register(&netiucv_driver); |
| 2111 | if (ret) { |
| 2112 | PRINT_ERR("NETIUCV: failed to register driver.\n"); |
| 2113 | IUCV_DBF_TEXT_(setup, 2, "ret %d from driver_register\n", ret); |
| 2114 | iucv_unregister_dbf_views(); |
| 2115 | return ret; |
| 2116 | } |
| 2117 | |
| 2118 | /* Add entry for specifying connections. */ |
| 2119 | ret = driver_create_file(&netiucv_driver, &driver_attr_connection); |
| 2120 | if (!ret) { |
| 2121 | ret = driver_create_file(&netiucv_driver, &driver_attr_remove); |
| 2122 | netiucv_banner(); |
| 2123 | } else { |
| 2124 | PRINT_ERR("NETIUCV: failed to add driver attribute.\n"); |
| 2125 | IUCV_DBF_TEXT_(setup, 2, "ret %d from driver_create_file\n", ret); |
| 2126 | driver_unregister(&netiucv_driver); |
| 2127 | iucv_unregister_dbf_views(); |
| 2128 | } |
| 2129 | return ret; |
| 2130 | } |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 2131 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2132 | module_init(netiucv_init); |
| 2133 | module_exit(netiucv_exit); |
| 2134 | MODULE_LICENSE("GPL"); |