| | 1 | /* |
| | 2 | * ipmi_devintf.c |
| | 3 | * |
| | 4 | * Linux device interface for the IPMI message handler. |
| | 5 | * |
| | 6 | * Author: MontaVista Software, Inc. |
| | 7 | * Corey Minyard <minyard@mvista.com> |
| | 8 | * source@mvista.com |
| | 9 | * |
| | 10 | * Copyright 2002 MontaVista Software Inc. |
| | 11 | * |
| | 12 | * This program is free software; you can redistribute it and/or modify it |
| | 13 | * under the terms of the GNU General Public License as published by the |
| | 14 | * Free Software Foundation; either version 2 of the License, or (at your |
| | 15 | * option) any later version. |
| | 16 | * |
| | 17 | * |
| | 18 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| | 19 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| | 20 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| | 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| | 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| | 23 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| | 24 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| | 25 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR |
| | 26 | * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE |
| | 27 | * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| | 28 | * |
| | 29 | * You should have received a copy of the GNU General Public License along |
| | 30 | * with this program; if not, write to the Free Software Foundation, Inc., |
| | 31 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| | 32 | */ |
| | 33 | |
| | 34 | #include <linux/module.h> |
| | 35 | #include <linux/moduleparam.h> |
| | 36 | #include <linux/errno.h> |
| | 37 | #include <linux/poll.h> |
| | 38 | #include <linux/sched.h> |
| | 39 | #include <linux/spinlock.h> |
| | 40 | #include <linux/slab.h> |
| | 41 | #include <linux/ipmi.h> |
| | 42 | #include <linux/mutex.h> |
| | 43 | #include <linux/init.h> |
| | 44 | #include <linux/device.h> |
| | 45 | #include <linux/compat.h> |
| | 46 | |
| | 47 | struct ipmi_file_private |
| | 48 | { |
| | 49 | ipmi_user_t user; |
| | 50 | spinlock_t recv_msg_lock; |
| | 51 | struct list_head recv_msgs; |
| | 52 | struct file *file; |
| | 53 | struct fasync_struct *fasync_queue; |
| | 54 | wait_queue_head_t wait; |
| | 55 | struct mutex recv_mutex; |
| | 56 | int default_retries; |
| | 57 | unsigned int default_retry_time_ms; |
| | 58 | }; |
| | 59 | |
| | 60 | static DEFINE_MUTEX(ipmi_mutex); |
| | 61 | static void file_receive_handler(struct ipmi_recv_msg *msg, |
| | 62 | void *handler_data) |
| | 63 | { |
| | 64 | struct ipmi_file_private *priv = handler_data; |
| | 65 | int was_empty; |
| | 66 | unsigned long flags; |
| | 67 | |
| | 68 | spin_lock_irqsave(&(priv->recv_msg_lock), flags); |
| | 69 | |
| | 70 | was_empty = list_empty(&(priv->recv_msgs)); |
| | 71 | list_add_tail(&(msg->link), &(priv->recv_msgs)); |
| | 72 | |
| | 73 | if (was_empty) { |
| | 74 | wake_up_interruptible(&priv->wait); |
| | 75 | kill_fasync(&priv->fasync_queue, SIGIO, POLL_IN); |
| | 76 | } |
| | 77 | |
| | 78 | spin_unlock_irqrestore(&(priv->recv_msg_lock), flags); |
| | 79 | } |
| | 80 | |
| | 81 | static unsigned int ipmi_poll(struct file *file, poll_table *wait) |
| | 82 | { |
| | 83 | struct ipmi_file_private *priv = file->private_data; |
| | 84 | unsigned int mask = 0; |
| | 85 | unsigned long flags; |
| | 86 | |
| | 87 | poll_wait(file, &priv->wait, wait); |
| | 88 | |
| | 89 | spin_lock_irqsave(&priv->recv_msg_lock, flags); |
| | 90 | |
| | 91 | if (!list_empty(&(priv->recv_msgs))) |
| | 92 | mask |= (POLLIN | POLLRDNORM); |
| | 93 | |
| | 94 | spin_unlock_irqrestore(&priv->recv_msg_lock, flags); |
| | 95 | |
| | 96 | return mask; |
| | 97 | } |
| | 98 | |
| | 99 | static int ipmi_fasync(int fd, struct file *file, int on) |
| | 100 | { |
| | 101 | struct ipmi_file_private *priv = file->private_data; |
| | 102 | int result; |
| | 103 | |
| | 104 | mutex_lock(&ipmi_mutex); /* could race against open() otherwise */ |
| | 105 | result = fasync_helper(fd, file, on, &priv->fasync_queue); |
| | 106 | mutex_unlock(&ipmi_mutex); |
| | 107 | |
| | 108 | return (result); |
| | 109 | } |
| | 110 | |
| | 111 | static struct ipmi_user_hndl ipmi_hndlrs = |
| | 112 | { |
| | 113 | .ipmi_recv_hndl = file_receive_handler, |
| | 114 | }; |
| | 115 | |
| | 116 | static int ipmi_open(struct inode *inode, struct file *file) |
| | 117 | { |
| | 118 | int if_num = iminor(inode); |
| | 119 | int rv; |
| | 120 | struct ipmi_file_private *priv; |
| | 121 | |
| | 122 | |
| | 123 | priv = kmalloc(sizeof(*priv), GFP_KERNEL); |
| | 124 | if (!priv) |
| | 125 | return -ENOMEM; |
| | 126 | |
| | 127 | mutex_lock(&ipmi_mutex); |
| | 128 | priv->file = file; |
| | 129 | |
| | 130 | rv = ipmi_create_user(if_num, |
| | 131 | &ipmi_hndlrs, |
| | 132 | priv, |
| | 133 | &(priv->user)); |
| | 134 | if (rv) { |
| | 135 | kfree(priv); |
| | 136 | goto out; |
| | 137 | } |
| | 138 | |
| | 139 | file->private_data = priv; |
| | 140 | |
| | 141 | spin_lock_init(&(priv->recv_msg_lock)); |
| | 142 | INIT_LIST_HEAD(&(priv->recv_msgs)); |
| | 143 | init_waitqueue_head(&priv->wait); |
| | 144 | priv->fasync_queue = NULL; |
| | 145 | mutex_init(&priv->recv_mutex); |
| | 146 | |
| | 147 | /* Use the low-level defaults. */ |
| | 148 | priv->default_retries = -1; |
| | 149 | priv->default_retry_time_ms = 0; |
| | 150 | |
| | 151 | out: |
| | 152 | mutex_unlock(&ipmi_mutex); |
| | 153 | return rv; |
| | 154 | } |
| | 155 | |
| | 156 | static int ipmi_release(struct inode *inode, struct file *file) |
| | 157 | { |
| | 158 | struct ipmi_file_private *priv = file->private_data; |
| | 159 | int rv; |
| | 160 | |
| | 161 | rv = ipmi_destroy_user(priv->user); |
| | 162 | if (rv) |
| | 163 | return rv; |
| | 164 | |
| | 165 | /* FIXME - free the messages in the list. */ |
| | 166 | kfree(priv); |
| | 167 | |
| | 168 | return 0; |
| | 169 | } |
| | 170 | |
| | 171 | static int handle_send_req(ipmi_user_t user, |
| | 172 | struct ipmi_req *req, |
| | 173 | int retries, |
| | 174 | unsigned int retry_time_ms) |
| | 175 | { |
| | 176 | int rv; |
| | 177 | struct ipmi_addr addr; |
| | 178 | struct kernel_ipmi_msg msg; |
| | 179 | |
| | 180 | if (req->addr_len > sizeof(struct ipmi_addr)) |
| | 181 | return -EINVAL; |
| | 182 | |
| | 183 | if (copy_from_user(&addr, req->addr, req->addr_len)) |
| | 184 | return -EFAULT; |
| | 185 | |
| | 186 | msg.netfn = req->msg.netfn; |
| | 187 | msg.cmd = req->msg.cmd; |
| | 188 | msg.data_len = req->msg.data_len; |
| | 189 | msg.data = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); |
| | 190 | if (!msg.data) |
| | 191 | return -ENOMEM; |
| | 192 | |
| | 193 | /* From here out we cannot return, we must jump to "out" for |
| | 194 | error exits to free msgdata. */ |
| | 195 | |
| | 196 | rv = ipmi_validate_addr(&addr, req->addr_len); |
| | 197 | if (rv) |
| | 198 | goto out; |
| | 199 | |
| | 200 | if (req->msg.data != NULL) { |
| | 201 | if (req->msg.data_len > IPMI_MAX_MSG_LENGTH) { |
| | 202 | rv = -EMSGSIZE; |
| | 203 | goto out; |
| | 204 | } |
| | 205 | |
| | 206 | if (copy_from_user(msg.data, |
| | 207 | req->msg.data, |
| | 208 | req->msg.data_len)) |
| | 209 | { |
| | 210 | rv = -EFAULT; |
| | 211 | goto out; |
| | 212 | } |
| | 213 | } else { |
| | 214 | msg.data_len = 0; |
| | 215 | } |
| | 216 | |
| | 217 | rv = ipmi_request_settime(user, |
| | 218 | &addr, |
| | 219 | req->msgid, |
| | 220 | &msg, |
| | 221 | NULL, |
| | 222 | 0, |
| | 223 | retries, |
| | 224 | retry_time_ms); |
| | 225 | out: |
| | 226 | kfree(msg.data); |
| | 227 | return rv; |
| | 228 | } |
| | 229 | |
| | 230 | static int ipmi_ioctl(struct file *file, |
| | 231 | unsigned int cmd, |
| | 232 | unsigned long data) |
| | 233 | { |
| | 234 | int rv = -EINVAL; |
| | 235 | struct ipmi_file_private *priv = file->private_data; |
| | 236 | void __user *arg = (void __user *)data; |
| | 237 | |
| | 238 | switch (cmd) |
| | 239 | { |
| | 240 | case IPMICTL_SEND_COMMAND: |
| | 241 | { |
| | 242 | struct ipmi_req req; |
| | 243 | |
| | 244 | if (copy_from_user(&req, arg, sizeof(req))) { |
| | 245 | rv = -EFAULT; |
| | 246 | break; |
| | 247 | } |
| | 248 | |
| | 249 | rv = handle_send_req(priv->user, |
| | 250 | &req, |
| | 251 | priv->default_retries, |
| | 252 | priv->default_retry_time_ms); |
| | 253 | break; |
| | 254 | } |
| | 255 | |
| | 256 | case IPMICTL_SEND_COMMAND_SETTIME: |
| | 257 | { |
| | 258 | struct ipmi_req_settime req; |
| | 259 | |
| | 260 | if (copy_from_user(&req, arg, sizeof(req))) { |
| | 261 | rv = -EFAULT; |
| | 262 | break; |
| | 263 | } |
| | 264 | |
| | 265 | rv = handle_send_req(priv->user, |
| | 266 | &req.req, |
| | 267 | req.retries, |
| | 268 | req.retry_time_ms); |
| | 269 | break; |
| | 270 | } |
| | 271 | |
| | 272 | case IPMICTL_RECEIVE_MSG: |
| | 273 | case IPMICTL_RECEIVE_MSG_TRUNC: |
| | 274 | { |
| | 275 | struct ipmi_recv rsp; |
| | 276 | int addr_len; |
| | 277 | struct list_head *entry; |
| | 278 | struct ipmi_recv_msg *msg; |
| | 279 | unsigned long flags; |
| | 280 | |
| | 281 | |
| | 282 | rv = 0; |
| | 283 | if (copy_from_user(&rsp, arg, sizeof(rsp))) { |
| | 284 | rv = -EFAULT; |
| | 285 | break; |
| | 286 | } |
| | 287 | |
| | 288 | /* We claim a mutex because we don't want two |
| | 289 | users getting something from the queue at a time. |
| | 290 | Since we have to release the spinlock before we can |
| | 291 | copy the data to the user, it's possible another |
| | 292 | user will grab something from the queue, too. Then |
| | 293 | the messages might get out of order if something |
| | 294 | fails and the message gets put back onto the |
| | 295 | queue. This mutex prevents that problem. */ |
| | 296 | mutex_lock(&priv->recv_mutex); |
| | 297 | |
| | 298 | /* Grab the message off the list. */ |
| | 299 | spin_lock_irqsave(&(priv->recv_msg_lock), flags); |
| | 300 | if (list_empty(&(priv->recv_msgs))) { |
| | 301 | spin_unlock_irqrestore(&(priv->recv_msg_lock), flags); |
| | 302 | rv = -EAGAIN; |
| | 303 | goto recv_err; |
| | 304 | } |
| | 305 | entry = priv->recv_msgs.next; |
| | 306 | msg = list_entry(entry, struct ipmi_recv_msg, link); |
| | 307 | list_del(entry); |
| | 308 | spin_unlock_irqrestore(&(priv->recv_msg_lock), flags); |
| | 309 | |
| | 310 | addr_len = ipmi_addr_length(msg->addr.addr_type); |
| | 311 | if (rsp.addr_len < addr_len) |
| | 312 | { |
| | 313 | rv = -EINVAL; |
| | 314 | goto recv_putback_on_err; |
| | 315 | } |
| | 316 | |
| | 317 | if (copy_to_user(rsp.addr, &(msg->addr), addr_len)) { |
| | 318 | rv = -EFAULT; |
| | 319 | goto recv_putback_on_err; |
| | 320 | } |
| | 321 | rsp.addr_len = addr_len; |
| | 322 | |
| | 323 | rsp.recv_type = msg->recv_type; |
| | 324 | rsp.msgid = msg->msgid; |
| | 325 | rsp.msg.netfn = msg->msg.netfn; |
| | 326 | rsp.msg.cmd = msg->msg.cmd; |
| | 327 | |
| | 328 | if (msg->msg.data_len > 0) { |
| | 329 | if (rsp.msg.data_len < msg->msg.data_len) { |
| | 330 | rv = -EMSGSIZE; |
| | 331 | if (cmd == IPMICTL_RECEIVE_MSG_TRUNC) { |
| | 332 | msg->msg.data_len = rsp.msg.data_len; |
| | 333 | } else { |
| | 334 | goto recv_putback_on_err; |
| | 335 | } |
| | 336 | } |
| | 337 | |
| | 338 | if (copy_to_user(rsp.msg.data, |
| | 339 | msg->msg.data, |
| | 340 | msg->msg.data_len)) |
| | 341 | { |
| | 342 | rv = -EFAULT; |
| | 343 | goto recv_putback_on_err; |
| | 344 | } |
| | 345 | rsp.msg.data_len = msg->msg.data_len; |
| | 346 | } else { |
| | 347 | rsp.msg.data_len = 0; |
| | 348 | } |
| | 349 | |
| | 350 | if (copy_to_user(arg, &rsp, sizeof(rsp))) { |
| | 351 | rv = -EFAULT; |
| | 352 | goto recv_putback_on_err; |
| | 353 | } |
| | 354 | |
| | 355 | mutex_unlock(&priv->recv_mutex); |
| | 356 | ipmi_free_recv_msg(msg); |
| | 357 | break; |
| | 358 | |
| | 359 | recv_putback_on_err: |
| | 360 | /* If we got an error, put the message back onto |
| | 361 | the head of the queue. */ |
| | 362 | spin_lock_irqsave(&(priv->recv_msg_lock), flags); |
| | 363 | list_add(entry, &(priv->recv_msgs)); |
| | 364 | spin_unlock_irqrestore(&(priv->recv_msg_lock), flags); |
| | 365 | mutex_unlock(&priv->recv_mutex); |
| | 366 | break; |
| | 367 | |
| | 368 | recv_err: |
| | 369 | mutex_unlock(&priv->recv_mutex); |
| | 370 | break; |
| | 371 | } |
| | 372 | |
| | 373 | case IPMICTL_REGISTER_FOR_CMD: |
| | 374 | { |
| | 375 | struct ipmi_cmdspec val; |
| | 376 | |
| | 377 | if (copy_from_user(&val, arg, sizeof(val))) { |
| | 378 | rv = -EFAULT; |
| | 379 | break; |
| | 380 | } |
| | 381 | |
| | 382 | rv = ipmi_register_for_cmd(priv->user, val.netfn, val.cmd, |
| | 383 | IPMI_CHAN_ALL); |
| | 384 | break; |
| | 385 | } |
| | 386 | |
| | 387 | case IPMICTL_UNREGISTER_FOR_CMD: |
| | 388 | { |
| | 389 | struct ipmi_cmdspec val; |
| | 390 | |
| | 391 | if (copy_from_user(&val, arg, sizeof(val))) { |
| | 392 | rv = -EFAULT; |
| | 393 | break; |
| | 394 | } |
| | 395 | |
| | 396 | rv = ipmi_unregister_for_cmd(priv->user, val.netfn, val.cmd, |
| | 397 | IPMI_CHAN_ALL); |
| | 398 | break; |
| | 399 | } |
| | 400 | |
| | 401 | case IPMICTL_REGISTER_FOR_CMD_CHANS: |
| | 402 | { |
| | 403 | struct ipmi_cmdspec_chans val; |
| | 404 | |
| | 405 | if (copy_from_user(&val, arg, sizeof(val))) { |
| | 406 | rv = -EFAULT; |
| | 407 | break; |
| | 408 | } |
| | 409 | |
| | 410 | rv = ipmi_register_for_cmd(priv->user, val.netfn, val.cmd, |
| | 411 | val.chans); |
| | 412 | break; |
| | 413 | } |
| | 414 | |
| | 415 | case IPMICTL_UNREGISTER_FOR_CMD_CHANS: |
| | 416 | { |
| | 417 | struct ipmi_cmdspec_chans val; |
| | 418 | |
| | 419 | if (copy_from_user(&val, arg, sizeof(val))) { |
| | 420 | rv = -EFAULT; |
| | 421 | break; |
| | 422 | } |
| | 423 | |
| | 424 | rv = ipmi_unregister_for_cmd(priv->user, val.netfn, val.cmd, |
| | 425 | val.chans); |
| | 426 | break; |
| | 427 | } |
| | 428 | |
| | 429 | case IPMICTL_SET_GETS_EVENTS_CMD: |
| | 430 | { |
| | 431 | int val; |
| | 432 | |
| | 433 | if (copy_from_user(&val, arg, sizeof(val))) { |
| | 434 | rv = -EFAULT; |
| | 435 | break; |
| | 436 | } |
| | 437 | |
| | 438 | rv = ipmi_set_gets_events(priv->user, val); |
| | 439 | break; |
| | 440 | } |
| | 441 | |
| | 442 | /* The next four are legacy, not per-channel. */ |
| | 443 | case IPMICTL_SET_MY_ADDRESS_CMD: |
| | 444 | { |
| | 445 | unsigned int val; |
| | 446 | |
| | 447 | if (copy_from_user(&val, arg, sizeof(val))) { |
| | 448 | rv = -EFAULT; |
| | 449 | break; |
| | 450 | } |
| | 451 | |
| | 452 | rv = ipmi_set_my_address(priv->user, 0, val); |
| | 453 | break; |
| | 454 | } |
| | 455 | |
| | 456 | case IPMICTL_GET_MY_ADDRESS_CMD: |
| | 457 | { |
| | 458 | unsigned int val; |
| | 459 | unsigned char rval; |
| | 460 | |
| | 461 | rv = ipmi_get_my_address(priv->user, 0, &rval); |
| | 462 | if (rv) |
| | 463 | break; |
| | 464 | |
| | 465 | val = rval; |
| | 466 | |
| | 467 | if (copy_to_user(arg, &val, sizeof(val))) { |
| | 468 | rv = -EFAULT; |
| | 469 | break; |
| | 470 | } |
| | 471 | break; |
| | 472 | } |
| | 473 | |
| | 474 | case IPMICTL_SET_MY_LUN_CMD: |
| | 475 | { |
| | 476 | unsigned int val; |
| | 477 | |
| | 478 | if (copy_from_user(&val, arg, sizeof(val))) { |
| | 479 | rv = -EFAULT; |
| | 480 | break; |
| | 481 | } |
| | 482 | |
| | 483 | rv = ipmi_set_my_LUN(priv->user, 0, val); |
| | 484 | break; |
| | 485 | } |
| | 486 | |
| | 487 | case IPMICTL_GET_MY_LUN_CMD: |
| | 488 | { |
| | 489 | unsigned int val; |
| | 490 | unsigned char rval; |
| | 491 | |
| | 492 | rv = ipmi_get_my_LUN(priv->user, 0, &rval); |
| | 493 | if (rv) |
| | 494 | break; |
| | 495 | |
| | 496 | val = rval; |
| | 497 | |
| | 498 | if (copy_to_user(arg, &val, sizeof(val))) { |
| | 499 | rv = -EFAULT; |
| | 500 | break; |
| | 501 | } |
| | 502 | break; |
| | 503 | } |
| | 504 | |
| | 505 | case IPMICTL_SET_MY_CHANNEL_ADDRESS_CMD: |
| | 506 | { |
| | 507 | struct ipmi_channel_lun_address_set val; |
| | 508 | |
| | 509 | if (copy_from_user(&val, arg, sizeof(val))) { |
| | 510 | rv = -EFAULT; |
| | 511 | break; |
| | 512 | } |
| | 513 | |
| | 514 | return ipmi_set_my_address(priv->user, val.channel, val.value); |
| | 515 | break; |
| | 516 | } |
| | 517 | |
| | 518 | case IPMICTL_GET_MY_CHANNEL_ADDRESS_CMD: |
| | 519 | { |
| | 520 | struct ipmi_channel_lun_address_set val; |
| | 521 | |
| | 522 | if (copy_from_user(&val, arg, sizeof(val))) { |
| | 523 | rv = -EFAULT; |
| | 524 | break; |
| | 525 | } |
| | 526 | |
| | 527 | rv = ipmi_get_my_address(priv->user, val.channel, &val.value); |
| | 528 | if (rv) |
| | 529 | break; |
| | 530 | |
| | 531 | if (copy_to_user(arg, &val, sizeof(val))) { |
| | 532 | rv = -EFAULT; |
| | 533 | break; |
| | 534 | } |
| | 535 | break; |
| | 536 | } |
| | 537 | |
| | 538 | case IPMICTL_SET_MY_CHANNEL_LUN_CMD: |
| | 539 | { |
| | 540 | struct ipmi_channel_lun_address_set val; |
| | 541 | |
| | 542 | if (copy_from_user(&val, arg, sizeof(val))) { |
| | 543 | rv = -EFAULT; |
| | 544 | break; |
| | 545 | } |
| | 546 | |
| | 547 | rv = ipmi_set_my_LUN(priv->user, val.channel, val.value); |
| | 548 | break; |
| | 549 | } |
| | 550 | |
| | 551 | case IPMICTL_GET_MY_CHANNEL_LUN_CMD: |
| | 552 | { |
| | 553 | struct ipmi_channel_lun_address_set val; |
| | 554 | |
| | 555 | if (copy_from_user(&val, arg, sizeof(val))) { |
| | 556 | rv = -EFAULT; |
| | 557 | break; |
| | 558 | } |
| | 559 | |
| | 560 | rv = ipmi_get_my_LUN(priv->user, val.channel, &val.value); |
| | 561 | if (rv) |
| | 562 | break; |
| | 563 | |
| | 564 | if (copy_to_user(arg, &val, sizeof(val))) { |
| | 565 | rv = -EFAULT; |
| | 566 | break; |
| | 567 | } |
| | 568 | break; |
| | 569 | } |
| | 570 | |
| | 571 | case IPMICTL_SET_TIMING_PARMS_CMD: |
| | 572 | { |
| | 573 | struct ipmi_timing_parms parms; |
| | 574 | |
| | 575 | if (copy_from_user(&parms, arg, sizeof(parms))) { |
| | 576 | rv = -EFAULT; |
| | 577 | break; |
| | 578 | } |
| | 579 | |
| | 580 | priv->default_retries = parms.retries; |
| | 581 | priv->default_retry_time_ms = parms.retry_time_ms; |
| | 582 | rv = 0; |
| | 583 | break; |
| | 584 | } |
| | 585 | |
| | 586 | case IPMICTL_GET_TIMING_PARMS_CMD: |
| | 587 | { |
| | 588 | struct ipmi_timing_parms parms; |
| | 589 | |
| | 590 | parms.retries = priv->default_retries; |
| | 591 | parms.retry_time_ms = priv->default_retry_time_ms; |
| | 592 | |
| | 593 | if (copy_to_user(arg, &parms, sizeof(parms))) { |
| | 594 | rv = -EFAULT; |
| | 595 | break; |
| | 596 | } |
| | 597 | |
| | 598 | rv = 0; |
| | 599 | break; |
| | 600 | } |
| | 601 | |
| | 602 | case IPMICTL_GET_MAINTENANCE_MODE_CMD: |
| | 603 | { |
| | 604 | int mode; |
| | 605 | |
| | 606 | mode = ipmi_get_maintenance_mode(priv->user); |
| | 607 | if (copy_to_user(arg, &mode, sizeof(mode))) { |
| | 608 | rv = -EFAULT; |
| | 609 | break; |
| | 610 | } |
| | 611 | rv = 0; |
| | 612 | break; |
| | 613 | } |
| | 614 | |
| | 615 | case IPMICTL_SET_MAINTENANCE_MODE_CMD: |
| | 616 | { |
| | 617 | int mode; |
| | 618 | |
| | 619 | if (copy_from_user(&mode, arg, sizeof(mode))) { |
| | 620 | rv = -EFAULT; |
| | 621 | break; |
| | 622 | } |
| | 623 | rv = ipmi_set_maintenance_mode(priv->user, mode); |
| | 624 | break; |
| | 625 | } |
| | 626 | } |
| | 627 | |
| | 628 | return rv; |
| | 629 | } |
| | 630 | |
| | 631 | /* |
| | 632 | * Note: it doesn't make sense to take the BKL here but |
| | 633 | * not in compat_ipmi_ioctl. -arnd |
| | 634 | */ |
| | 635 | static long ipmi_unlocked_ioctl(struct file *file, |
| | 636 | unsigned int cmd, |
| | 637 | unsigned long data) |
| | 638 | { |
| | 639 | int ret; |
| | 640 | |
| | 641 | mutex_lock(&ipmi_mutex); |
| | 642 | ret = ipmi_ioctl(file, cmd, data); |
| | 643 | mutex_unlock(&ipmi_mutex); |
| | 644 | |
| | 645 | return ret; |
| | 646 | } |
| | 647 | |
| | 648 | #ifdef CONFIG_COMPAT |
| | 649 | |
| | 650 | /* |
| | 651 | * The following code contains code for supporting 32-bit compatible |
| | 652 | * ioctls on 64-bit kernels. This allows running 32-bit apps on the |
| | 653 | * 64-bit kernel |
| | 654 | */ |
| | 655 | #define COMPAT_IPMICTL_SEND_COMMAND \ |
| | 656 | _IOR(IPMI_IOC_MAGIC, 13, struct compat_ipmi_req) |
| | 657 | #define COMPAT_IPMICTL_SEND_COMMAND_SETTIME \ |
| | 658 | _IOR(IPMI_IOC_MAGIC, 21, struct compat_ipmi_req_settime) |
| | 659 | #define COMPAT_IPMICTL_RECEIVE_MSG \ |
| | 660 | _IOWR(IPMI_IOC_MAGIC, 12, struct compat_ipmi_recv) |
| | 661 | #define COMPAT_IPMICTL_RECEIVE_MSG_TRUNC \ |
| | 662 | _IOWR(IPMI_IOC_MAGIC, 11, struct compat_ipmi_recv) |
| | 663 | |
| | 664 | struct compat_ipmi_msg { |
| | 665 | u8 netfn; |
| | 666 | u8 cmd; |
| | 667 | u16 data_len; |
| | 668 | compat_uptr_t data; |
| | 669 | }; |
| | 670 | |
| | 671 | struct compat_ipmi_req { |
| | 672 | compat_uptr_t addr; |
| | 673 | compat_uint_t addr_len; |
| | 674 | compat_long_t msgid; |
| | 675 | struct compat_ipmi_msg msg; |
| | 676 | }; |
| | 677 | |
| | 678 | struct compat_ipmi_recv { |
| | 679 | compat_int_t recv_type; |
| | 680 | compat_uptr_t addr; |
| | 681 | compat_uint_t addr_len; |
| | 682 | compat_long_t msgid; |
| | 683 | struct compat_ipmi_msg msg; |
| | 684 | }; |
| | 685 | |
| | 686 | struct compat_ipmi_req_settime { |
| | 687 | struct compat_ipmi_req req; |
| | 688 | compat_int_t retries; |
| | 689 | compat_uint_t retry_time_ms; |
| | 690 | }; |
| | 691 | |
| | 692 | /* |
| | 693 | * Define some helper functions for copying IPMI data |
| | 694 | */ |
| | 695 | static long get_compat_ipmi_msg(struct ipmi_msg *p64, |
| | 696 | struct compat_ipmi_msg __user *p32) |
| | 697 | { |
| | 698 | compat_uptr_t tmp; |
| | 699 | |
| | 700 | if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || |
| | 701 | __get_user(p64->netfn, &p32->netfn) || |
| | 702 | __get_user(p64->cmd, &p32->cmd) || |
| | 703 | __get_user(p64->data_len, &p32->data_len) || |
| | 704 | __get_user(tmp, &p32->data)) |
| | 705 | return -EFAULT; |
| | 706 | p64->data = compat_ptr(tmp); |
| | 707 | return 0; |
| | 708 | } |
| | 709 | |
| | 710 | static long put_compat_ipmi_msg(struct ipmi_msg *p64, |
| | 711 | struct compat_ipmi_msg __user *p32) |
| | 712 | { |
| | 713 | if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) || |
| | 714 | __put_user(p64->netfn, &p32->netfn) || |
| | 715 | __put_user(p64->cmd, &p32->cmd) || |
| | 716 | __put_user(p64->data_len, &p32->data_len)) |
| | 717 | return -EFAULT; |
| | 718 | return 0; |
| | 719 | } |
| | 720 | |
| | 721 | static long get_compat_ipmi_req(struct ipmi_req *p64, |
| | 722 | struct compat_ipmi_req __user *p32) |
| | 723 | { |
| | 724 | |
| | 725 | compat_uptr_t tmp; |
| | 726 | |
| | 727 | if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || |
| | 728 | __get_user(tmp, &p32->addr) || |
| | 729 | __get_user(p64->addr_len, &p32->addr_len) || |
| | 730 | __get_user(p64->msgid, &p32->msgid) || |
| | 731 | get_compat_ipmi_msg(&p64->msg, &p32->msg)) |
| | 732 | return -EFAULT; |
| | 733 | p64->addr = compat_ptr(tmp); |
| | 734 | return 0; |
| | 735 | } |
| | 736 | |
| | 737 | static long get_compat_ipmi_req_settime(struct ipmi_req_settime *p64, |
| | 738 | struct compat_ipmi_req_settime __user *p32) |
| | 739 | { |
| | 740 | if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || |
| | 741 | get_compat_ipmi_req(&p64->req, &p32->req) || |
| | 742 | __get_user(p64->retries, &p32->retries) || |
| | 743 | __get_user(p64->retry_time_ms, &p32->retry_time_ms)) |
| | 744 | return -EFAULT; |
| | 745 | return 0; |
| | 746 | } |
| | 747 | |
| | 748 | static long get_compat_ipmi_recv(struct ipmi_recv *p64, |
| | 749 | struct compat_ipmi_recv __user *p32) |
| | 750 | { |
| | 751 | compat_uptr_t tmp; |
| | 752 | |
| | 753 | if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || |
| | 754 | __get_user(p64->recv_type, &p32->recv_type) || |
| | 755 | __get_user(tmp, &p32->addr) || |
| | 756 | __get_user(p64->addr_len, &p32->addr_len) || |
| | 757 | __get_user(p64->msgid, &p32->msgid) || |
| | 758 | get_compat_ipmi_msg(&p64->msg, &p32->msg)) |
| | 759 | return -EFAULT; |
| | 760 | p64->addr = compat_ptr(tmp); |
| | 761 | return 0; |
| | 762 | } |
| | 763 | |
| | 764 | static long put_compat_ipmi_recv(struct ipmi_recv *p64, |
| | 765 | struct compat_ipmi_recv __user *p32) |
| | 766 | { |
| | 767 | if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) || |
| | 768 | __put_user(p64->recv_type, &p32->recv_type) || |
| | 769 | __put_user(p64->addr_len, &p32->addr_len) || |
| | 770 | __put_user(p64->msgid, &p32->msgid) || |
| | 771 | put_compat_ipmi_msg(&p64->msg, &p32->msg)) |
| | 772 | return -EFAULT; |
| | 773 | return 0; |
| | 774 | } |
| | 775 | |
| | 776 | /* |
| | 777 | * Handle compatibility ioctls |
| | 778 | */ |
| | 779 | static long compat_ipmi_ioctl(struct file *filep, unsigned int cmd, |
| | 780 | unsigned long arg) |
| | 781 | { |
| | 782 | int rc; |
| | 783 | struct ipmi_file_private *priv = filep->private_data; |
| | 784 | |
| | 785 | switch(cmd) { |
| | 786 | case COMPAT_IPMICTL_SEND_COMMAND: |
| | 787 | { |
| | 788 | struct ipmi_req rp; |
| | 789 | |
| | 790 | if (get_compat_ipmi_req(&rp, compat_ptr(arg))) |
| | 791 | return -EFAULT; |
| | 792 | |
| | 793 | return handle_send_req(priv->user, &rp, |
| | 794 | priv->default_retries, |
| | 795 | priv->default_retry_time_ms); |
| | 796 | } |
| | 797 | case COMPAT_IPMICTL_SEND_COMMAND_SETTIME: |
| | 798 | { |
| | 799 | struct ipmi_req_settime sp; |
| | 800 | |
| | 801 | if (get_compat_ipmi_req_settime(&sp, compat_ptr(arg))) |
| | 802 | return -EFAULT; |
| | 803 | |
| | 804 | return handle_send_req(priv->user, &sp.req, |
| | 805 | sp.retries, sp.retry_time_ms); |
| | 806 | } |
| | 807 | case COMPAT_IPMICTL_RECEIVE_MSG: |
| | 808 | case COMPAT_IPMICTL_RECEIVE_MSG_TRUNC: |
| | 809 | { |
| | 810 | struct ipmi_recv __user *precv64; |
| | 811 | struct ipmi_recv recv64; |
| | 812 | |
| | 813 | if (get_compat_ipmi_recv(&recv64, compat_ptr(arg))) |
| | 814 | return -EFAULT; |
| | 815 | |
| | 816 | precv64 = compat_alloc_user_space(sizeof(recv64)); |
| | 817 | if (copy_to_user(precv64, &recv64, sizeof(recv64))) |
| | 818 | return -EFAULT; |
| | 819 | |
| | 820 | rc = ipmi_ioctl(filep, |
| | 821 | ((cmd == COMPAT_IPMICTL_RECEIVE_MSG) |
| | 822 | ? IPMICTL_RECEIVE_MSG |
| | 823 | : IPMICTL_RECEIVE_MSG_TRUNC), |
| | 824 | (unsigned long) precv64); |
| | 825 | if (rc != 0) |
| | 826 | return rc; |
| | 827 | |
| | 828 | if (copy_from_user(&recv64, precv64, sizeof(recv64))) |
| | 829 | return -EFAULT; |
| | 830 | |
| | 831 | if (put_compat_ipmi_recv(&recv64, compat_ptr(arg))) |
| | 832 | return -EFAULT; |
| | 833 | |
| | 834 | return rc; |
| | 835 | } |
| | 836 | default: |
| | 837 | return ipmi_ioctl(filep, cmd, arg); |
| | 838 | } |
| | 839 | } |
| | 840 | |
| | 841 | static long unlocked_compat_ipmi_ioctl(struct file *filep, unsigned int cmd, |
| | 842 | unsigned long arg) |
| | 843 | { |
| | 844 | int ret; |
| | 845 | |
| | 846 | mutex_lock(&ipmi_mutex); |
| | 847 | ret = compat_ipmi_ioctl(filep, cmd, arg); |
| | 848 | mutex_unlock(&ipmi_mutex); |
| | 849 | |
| | 850 | return ret; |
| | 851 | } |
| | 852 | #endif |
| | 853 | |
| | 854 | static const struct file_operations ipmi_fops = { |
| | 855 | .owner = THIS_MODULE, |
| | 856 | .unlocked_ioctl = ipmi_unlocked_ioctl, |
| | 857 | #ifdef CONFIG_COMPAT |
| | 858 | .compat_ioctl = unlocked_compat_ipmi_ioctl, |
| | 859 | #endif |
| | 860 | .open = ipmi_open, |
| | 861 | .release = ipmi_release, |
| | 862 | .fasync = ipmi_fasync, |
| | 863 | .poll = ipmi_poll, |
| | 864 | .llseek = noop_llseek, |
| | 865 | }; |
| | 866 | |
| | 867 | #define DEVICE_NAME "ipmidev" |
| | 868 | |
| | 869 | static int ipmi_major; |
| | 870 | module_param(ipmi_major, int, 0); |
| | 871 | MODULE_PARM_DESC(ipmi_major, "Sets the major number of the IPMI device. By" |
| | 872 | " default, or if you set it to zero, it will choose the next" |
| | 873 | " available device. Setting it to -1 will disable the" |
| | 874 | " interface. Other values will set the major device number" |
| | 875 | " to that value."); |
| | 876 | |
| | 877 | /* Keep track of the devices that are registered. */ |
| | 878 | struct ipmi_reg_list { |
| | 879 | dev_t dev; |
| | 880 | struct list_head link; |
| | 881 | }; |
| | 882 | static LIST_HEAD(reg_list); |
| | 883 | static DEFINE_MUTEX(reg_list_mutex); |
| | 884 | |
| | 885 | static struct class *ipmi_class; |
| | 886 | |
| | 887 | static void ipmi_new_smi(int if_num, struct device *device) |
| | 888 | { |
| | 889 | dev_t dev = MKDEV(ipmi_major, if_num); |
| | 890 | struct ipmi_reg_list *entry; |
| | 891 | |
| | 892 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); |
| | 893 | if (!entry) { |
| | 894 | printk(KERN_ERR "ipmi_devintf: Unable to create the" |
| | 895 | " ipmi class device link\n"); |
| | 896 | return; |
| | 897 | } |
| | 898 | entry->dev = dev; |
| | 899 | |
| | 900 | mutex_lock(®_list_mutex); |
| | 901 | device_create(ipmi_class, device, dev, NULL, "ipmi%d", if_num); |
| | 902 | list_add(&entry->link, ®_list); |
| | 903 | mutex_unlock(®_list_mutex); |
| | 904 | } |
| | 905 | |
| | 906 | static void ipmi_smi_gone(int if_num) |
| | 907 | { |
| | 908 | dev_t dev = MKDEV(ipmi_major, if_num); |
| | 909 | struct ipmi_reg_list *entry; |
| | 910 | |
| | 911 | mutex_lock(®_list_mutex); |
| | 912 | list_for_each_entry(entry, ®_list, link) { |
| | 913 | if (entry->dev == dev) { |
| | 914 | list_del(&entry->link); |
| | 915 | kfree(entry); |
| | 916 | break; |
| | 917 | } |
| | 918 | } |
| | 919 | device_destroy(ipmi_class, dev); |
| | 920 | mutex_unlock(®_list_mutex); |
| | 921 | } |
| | 922 | |
| | 923 | static struct ipmi_smi_watcher smi_watcher = |
| | 924 | { |
| | 925 | .owner = THIS_MODULE, |
| | 926 | .new_smi = ipmi_new_smi, |
| | 927 | .smi_gone = ipmi_smi_gone, |
| | 928 | }; |
| | 929 | |
| | 930 | static int __init init_ipmi_devintf(void) |
| | 931 | { |
| | 932 | int rv; |
| | 933 | |
| | 934 | if (ipmi_major < 0) |
| | 935 | return -EINVAL; |
| | 936 | |
| | 937 | printk(KERN_INFO "ipmi device interface\n"); |
| | 938 | |
| | 939 | ipmi_class = class_create(THIS_MODULE, "ipmi"); |
| | 940 | if (IS_ERR(ipmi_class)) { |
| | 941 | printk(KERN_ERR "ipmi: can't register device class\n"); |
| | 942 | return PTR_ERR(ipmi_class); |
| | 943 | } |
| | 944 | |
| | 945 | rv = register_chrdev(ipmi_major, DEVICE_NAME, &ipmi_fops); |
| | 946 | if (rv < 0) { |
| | 947 | class_destroy(ipmi_class); |
| | 948 | printk(KERN_ERR "ipmi: can't get major %d\n", ipmi_major); |
| | 949 | return rv; |
| | 950 | } |
| | 951 | |
| | 952 | if (ipmi_major == 0) { |
| | 953 | ipmi_major = rv; |
| | 954 | } |
| | 955 | |
| | 956 | rv = ipmi_smi_watcher_register(&smi_watcher); |
| | 957 | if (rv) { |
| | 958 | unregister_chrdev(ipmi_major, DEVICE_NAME); |
| | 959 | class_destroy(ipmi_class); |
| | 960 | printk(KERN_WARNING "ipmi: can't register smi watcher\n"); |
| | 961 | return rv; |
| | 962 | } |
| | 963 | |
| | 964 | return 0; |
| | 965 | } |
| | 966 | module_init(init_ipmi_devintf); |
| | 967 | |
| | 968 | static void __exit cleanup_ipmi(void) |
| | 969 | { |
| | 970 | struct ipmi_reg_list *entry, *entry2; |
| | 971 | mutex_lock(®_list_mutex); |
| | 972 | list_for_each_entry_safe(entry, entry2, ®_list, link) { |
| | 973 | list_del(&entry->link); |
| | 974 | device_destroy(ipmi_class, entry->dev); |
| | 975 | kfree(entry); |
| | 976 | } |
| | 977 | mutex_unlock(®_list_mutex); |
| | 978 | class_destroy(ipmi_class); |
| | 979 | ipmi_smi_watcher_unregister(&smi_watcher); |
| | 980 | unregister_chrdev(ipmi_major, DEVICE_NAME); |
| | 981 | } |
| | 982 | module_exit(cleanup_ipmi); |
| | 983 | |
| | 984 | MODULE_LICENSE("GPL"); |
| | 985 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
| | 986 | MODULE_DESCRIPTION("Linux device interface for the IPMI message handler."); |
| | 987 | MODULE_ALIAS("platform:ipmi_si"); |
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame_incremental