1 /* 2 * linux/kernel/scsi_debug.c 3 * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv 4 * Copyright (C) 1992 Eric Youngdale 5 * Simulate a host adapter with 2 disks attached. Do a lot of checking 6 * to make sure that we are not getting blocks mixed up, and PANIC if 7 * anything out of the ordinary is seen. 8 * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 9 * 10 * This version is more generic, simulating a variable number of disk 11 * (or disk like devices) sharing a common amount of RAM 12 * 13 * 14 * For documentation see http://www.torque.net/sg/sdebug26.html 15 * 16 * D. Gilbert (dpg) work for Magneto-Optical device test [20010421] 17 * dpg: work for devfs large number of disks [20010809] 18 * forked for lk 2.5 series [20011216, 20020101] 19 * use vmalloc() more inquiry+mode_sense [20020302] 20 * add timers for delayed responses [20020721] 21 * Patrick Mansfield <patmans@us.ibm.com> max_luns+scsi_level [20021031] 22 * Mike Anderson <andmike@us.ibm.com> sysfs work [20021118] 23 * dpg: change style of boot options to "scsi_debug.num_tgts=2" and 24 * module options to "modprobe scsi_debug num_tgts=2" [20021221] 25 */ 26 27 #include <linux/config.h> 28 #include <linux/module.h> 29 30 #include <linux/kernel.h> 31 #include <linux/sched.h> 32 #include <linux/errno.h> 33 #include <linux/timer.h> 34 #include <linux/types.h> 35 #include <linux/string.h> 36 #include <linux/genhd.h> 37 #include <linux/fs.h> 38 #include <linux/init.h> 39 #include <linux/proc_fs.h> 40 #include <linux/smp_lock.h> 41 #include <linux/vmalloc.h> 42 #include <linux/moduleparam.h> 43 44 #include <linux/blkdev.h> 45 #include "scsi.h" 46 #include <scsi/scsi_host.h> 47 #include <scsi/scsicam.h> 48 49 #include <linux/stat.h> 50 51 #include "scsi_logging.h" 52 #include "scsi_debug.h" 53 54 #define SCSI_DEBUG_VERSION "1.75" 55 static const char * scsi_debug_version_date = "20050113"; 56 57 /* Additional Sense Code (ASC) used */ 58 #define NO_ADDED_SENSE 0x0 59 #define UNRECOVERED_READ_ERR 0x11 60 #define INVALID_OPCODE 0x20 61 #define ADDR_OUT_OF_RANGE 0x21 62 #define INVALID_FIELD_IN_CDB 0x24 63 #define POWERON_RESET 0x29 64 #define SAVING_PARAMS_UNSUP 0x39 65 #define THRESHHOLD_EXCEEDED 0x5d 66 67 #define SDEBUG_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */ 68 69 /* Default values for driver parameters */ 70 #define DEF_NUM_HOST 1 71 #define DEF_NUM_TGTS 1 72 #define DEF_MAX_LUNS 1 73 /* With these defaults, this driver will make 1 host with 1 target 74 * (id 0) containing 1 logical unit (lun 0). That is 1 device. 75 */ 76 #define DEF_DELAY 1 77 #define DEF_DEV_SIZE_MB 8 78 #define DEF_EVERY_NTH 0 79 #define DEF_NUM_PARTS 0 80 #define DEF_OPTS 0 81 #define DEF_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */ 82 #define DEF_PTYPE 0 83 #define DEF_D_SENSE 0 84 85 /* bit mask values for scsi_debug_opts */ 86 #define SCSI_DEBUG_OPT_NOISE 1 87 #define SCSI_DEBUG_OPT_MEDIUM_ERR 2 88 #define SCSI_DEBUG_OPT_TIMEOUT 4 89 #define SCSI_DEBUG_OPT_RECOVERED_ERR 8 90 /* When "every_nth" > 0 then modulo "every_nth" commands: 91 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set 92 * - a RECOVERED_ERROR is simulated on successful read and write 93 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set. 94 * 95 * When "every_nth" < 0 then after "- every_nth" commands: 96 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set 97 * - a RECOVERED_ERROR is simulated on successful read and write 98 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set. 99 * This will continue until some other action occurs (e.g. the user 100 * writing a new value (other than -1 or 1) to every_nth via sysfs). 101 */ 102 103 /* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this 104 * sector on read commands: */ 105 #define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */ 106 107 /* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1) 108 * or "peripheral device" addressing (value 0) */ 109 #define SAM2_LUN_ADDRESS_METHOD 0 110 111 static int scsi_debug_add_host = DEF_NUM_HOST; 112 static int scsi_debug_delay = DEF_DELAY; 113 static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB; 114 static int scsi_debug_every_nth = DEF_EVERY_NTH; 115 static int scsi_debug_max_luns = DEF_MAX_LUNS; 116 static int scsi_debug_num_parts = DEF_NUM_PARTS; 117 static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */ 118 static int scsi_debug_opts = DEF_OPTS; 119 static int scsi_debug_scsi_level = DEF_SCSI_LEVEL; 120 static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */ 121 static int scsi_debug_dsense = DEF_D_SENSE; 122 123 static int scsi_debug_cmnd_count = 0; 124 125 #define DEV_READONLY(TGT) (0) 126 #define DEV_REMOVEABLE(TGT) (0) 127 128 static unsigned long sdebug_store_size; /* in bytes */ 129 static sector_t sdebug_capacity; /* in sectors */ 130 131 /* old BIOS stuff, kernel may get rid of them but some mode sense pages 132 may still need them */ 133 static int sdebug_heads; /* heads per disk */ 134 static int sdebug_cylinders_per; /* cylinders per surface */ 135 static int sdebug_sectors_per; /* sectors per cylinder */ 136 137 /* default sector size is 512 bytes, 2**9 bytes */ 138 #define POW2_SECT_SIZE 9 139 #define SECT_SIZE (1 << POW2_SECT_SIZE) 140 #define SECT_SIZE_PER(TGT) SECT_SIZE 141 142 #define SDEBUG_MAX_PARTS 4 143 144 #define SDEBUG_SENSE_LEN 32 145 146 struct sdebug_dev_info { 147 struct list_head dev_list; 148 unsigned char sense_buff[SDEBUG_SENSE_LEN]; /* weak nexus */ 149 unsigned int channel; 150 unsigned int target; 151 unsigned int lun; 152 struct sdebug_host_info *sdbg_host; 153 char reset; 154 char used; 155 }; 156 157 struct sdebug_host_info { 158 struct list_head host_list; 159 struct Scsi_Host *shost; 160 struct device dev; 161 struct list_head dev_info_list; 162 }; 163 164 #define to_sdebug_host(d) \ 165 container_of(d, struct sdebug_host_info, dev) 166 167 static LIST_HEAD(sdebug_host_list); 168 static DEFINE_SPINLOCK(sdebug_host_list_lock); 169 170 typedef void (* done_funct_t) (struct scsi_cmnd *); 171 172 struct sdebug_queued_cmd { 173 int in_use; 174 struct timer_list cmnd_timer; 175 done_funct_t done_funct; 176 struct scsi_cmnd * a_cmnd; 177 int scsi_result; 178 }; 179 static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE]; 180 181 static struct scsi_host_template sdebug_driver_template = { 182 .proc_info = scsi_debug_proc_info, 183 .name = "SCSI DEBUG", 184 .info = scsi_debug_info, 185 .slave_alloc = scsi_debug_slave_alloc, 186 .slave_configure = scsi_debug_slave_configure, 187 .slave_destroy = scsi_debug_slave_destroy, 188 .ioctl = scsi_debug_ioctl, 189 .queuecommand = scsi_debug_queuecommand, 190 .eh_abort_handler = scsi_debug_abort, 191 .eh_bus_reset_handler = scsi_debug_bus_reset, 192 .eh_device_reset_handler = scsi_debug_device_reset, 193 .eh_host_reset_handler = scsi_debug_host_reset, 194 .bios_param = scsi_debug_biosparam, 195 .can_queue = SCSI_DEBUG_CANQUEUE, 196 .this_id = 7, 197 .sg_tablesize = 64, 198 .cmd_per_lun = 3, 199 .max_sectors = 4096, 200 .unchecked_isa_dma = 0, 201 .use_clustering = DISABLE_CLUSTERING, 202 .module = THIS_MODULE, 203 }; 204 205 static unsigned char * fake_storep; /* ramdisk storage */ 206 207 static int num_aborts = 0; 208 static int num_dev_resets = 0; 209 static int num_bus_resets = 0; 210 static int num_host_resets = 0; 211 212 static DEFINE_SPINLOCK(queued_arr_lock); 213 static DEFINE_RWLOCK(atomic_rw); 214 215 static char sdebug_proc_name[] = "scsi_debug"; 216 217 static int sdebug_driver_probe(struct device *); 218 static int sdebug_driver_remove(struct device *); 219 static struct bus_type pseudo_lld_bus; 220 221 static struct device_driver sdebug_driverfs_driver = { 222 .name = sdebug_proc_name, 223 .bus = &pseudo_lld_bus, 224 }; 225 226 static const int check_condition_result = 227 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 228 229 /* function declarations */ 230 static int resp_inquiry(struct scsi_cmnd * SCpnt, int target, 231 struct sdebug_dev_info * devip); 232 static int resp_requests(struct scsi_cmnd * SCpnt, 233 struct sdebug_dev_info * devip); 234 static int resp_readcap(struct scsi_cmnd * SCpnt, 235 struct sdebug_dev_info * devip); 236 static int resp_mode_sense(struct scsi_cmnd * SCpnt, int target, 237 struct sdebug_dev_info * devip); 238 static int resp_read(struct scsi_cmnd * SCpnt, int upper_blk, int block, 239 int num, struct sdebug_dev_info * devip); 240 static int resp_write(struct scsi_cmnd * SCpnt, int upper_blk, int block, 241 int num, struct sdebug_dev_info * devip); 242 static int resp_report_luns(struct scsi_cmnd * SCpnt, 243 struct sdebug_dev_info * devip); 244 static int fill_from_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr, 245 int arr_len); 246 static int fetch_to_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr, 247 int max_arr_len); 248 static void timer_intr_handler(unsigned long); 249 static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev); 250 static void mk_sense_buffer(struct sdebug_dev_info * devip, int key, 251 int asc, int asq); 252 static int check_reset(struct scsi_cmnd * SCpnt, 253 struct sdebug_dev_info * devip); 254 static int schedule_resp(struct scsi_cmnd * cmnd, 255 struct sdebug_dev_info * devip, 256 done_funct_t done, int scsi_result, int delta_jiff); 257 static void __init sdebug_build_parts(unsigned char * ramp); 258 static void __init init_all_queued(void); 259 static void stop_all_queued(void); 260 static int stop_queued_cmnd(struct scsi_cmnd * cmnd); 261 static int inquiry_evpd_83(unsigned char * arr, int dev_id_num, 262 const char * dev_id_str, int dev_id_str_len); 263 static void do_create_driverfs_files(void); 264 static void do_remove_driverfs_files(void); 265 266 static int sdebug_add_adapter(void); 267 static void sdebug_remove_adapter(void); 268 static void sdebug_max_tgts_luns(void); 269 270 static struct device pseudo_primary; 271 static struct bus_type pseudo_lld_bus; 272 273 274 static 275 int scsi_debug_queuecommand(struct scsi_cmnd * SCpnt, done_funct_t done) 276 { 277 unsigned char *cmd = (unsigned char *) SCpnt->cmnd; 278 int block, upper_blk, num, k; 279 int errsts = 0; 280 int target = scmd_id(SCpnt); 281 struct sdebug_dev_info * devip = NULL; 282 int inj_recovered = 0; 283 284 if (done == NULL) 285 return 0; /* assume mid level reprocessing command */ 286 287 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) { 288 printk(KERN_INFO "scsi_debug: cmd "); 289 for (k = 0, num = SCpnt->cmd_len; k < num; ++k) 290 printk("%02x ", (int)cmd[k]); 291 printk("\n"); 292 } 293 if(target == sdebug_driver_template.this_id) { 294 printk(KERN_INFO "scsi_debug: initiator's id used as " 295 "target!\n"); 296 return schedule_resp(SCpnt, NULL, done, 297 DID_NO_CONNECT << 16, 0); 298 } 299 300 if (SCpnt->device->lun >= scsi_debug_max_luns) 301 return schedule_resp(SCpnt, NULL, done, 302 DID_NO_CONNECT << 16, 0); 303 devip = devInfoReg(SCpnt->device); 304 if (NULL == devip) 305 return schedule_resp(SCpnt, NULL, done, 306 DID_NO_CONNECT << 16, 0); 307 308 if ((scsi_debug_every_nth != 0) && 309 (++scsi_debug_cmnd_count >= abs(scsi_debug_every_nth))) { 310 scsi_debug_cmnd_count = 0; 311 if (scsi_debug_every_nth < -1) 312 scsi_debug_every_nth = -1; 313 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts) 314 return 0; /* ignore command causing timeout */ 315 else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts) 316 inj_recovered = 1; /* to reads and writes below */ 317 } 318 319 switch (*cmd) { 320 case INQUIRY: /* mandatory, ignore unit attention */ 321 errsts = resp_inquiry(SCpnt, target, devip); 322 break; 323 case REQUEST_SENSE: /* mandatory, ignore unit attention */ 324 errsts = resp_requests(SCpnt, devip); 325 break; 326 case REZERO_UNIT: /* actually this is REWIND for SSC */ 327 case START_STOP: 328 errsts = check_reset(SCpnt, devip); 329 break; 330 case ALLOW_MEDIUM_REMOVAL: 331 if ((errsts = check_reset(SCpnt, devip))) 332 break; 333 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 334 printk(KERN_INFO "scsi_debug: Medium removal %s\n", 335 cmd[4] ? "inhibited" : "enabled"); 336 break; 337 case SEND_DIAGNOSTIC: /* mandatory */ 338 errsts = check_reset(SCpnt, devip); 339 break; 340 case TEST_UNIT_READY: /* mandatory */ 341 errsts = check_reset(SCpnt, devip); 342 break; 343 case RESERVE: 344 errsts = check_reset(SCpnt, devip); 345 break; 346 case RESERVE_10: 347 errsts = check_reset(SCpnt, devip); 348 break; 349 case RELEASE: 350 errsts = check_reset(SCpnt, devip); 351 break; 352 case RELEASE_10: 353 errsts = check_reset(SCpnt, devip); 354 break; 355 case READ_CAPACITY: 356 errsts = resp_readcap(SCpnt, devip); 357 break; 358 case READ_16: 359 case READ_12: 360 case READ_10: 361 case READ_6: 362 if ((errsts = check_reset(SCpnt, devip))) 363 break; 364 upper_blk = 0; 365 if ((*cmd) == READ_16) { 366 upper_blk = cmd[5] + (cmd[4] << 8) + 367 (cmd[3] << 16) + (cmd[2] << 24); 368 block = cmd[9] + (cmd[8] << 8) + 369 (cmd[7] << 16) + (cmd[6] << 24); 370 num = cmd[13] + (cmd[12] << 8) + 371 (cmd[11] << 16) + (cmd[10] << 24); 372 } else if ((*cmd) == READ_12) { 373 block = cmd[5] + (cmd[4] << 8) + 374 (cmd[3] << 16) + (cmd[2] << 24); 375 num = cmd[9] + (cmd[8] << 8) + 376 (cmd[7] << 16) + (cmd[6] << 24); 377 } else if ((*cmd) == READ_10) { 378 block = cmd[5] + (cmd[4] << 8) + 379 (cmd[3] << 16) + (cmd[2] << 24); 380 num = cmd[8] + (cmd[7] << 8); 381 } else { 382 block = cmd[3] + (cmd[2] << 8) + 383 ((cmd[1] & 0x1f) << 16); 384 num = cmd[4]; 385 } 386 errsts = resp_read(SCpnt, upper_blk, block, num, devip); 387 if (inj_recovered && (0 == errsts)) { 388 mk_sense_buffer(devip, RECOVERED_ERROR, 389 THRESHHOLD_EXCEEDED, 0); 390 errsts = check_condition_result; 391 } 392 break; 393 case REPORT_LUNS: /* mandatory, ignore unit attention */ 394 errsts = resp_report_luns(SCpnt, devip); 395 break; 396 case VERIFY: /* 10 byte SBC-2 command */ 397 errsts = check_reset(SCpnt, devip); 398 break; 399 case WRITE_16: 400 case WRITE_12: 401 case WRITE_10: 402 case WRITE_6: 403 if ((errsts = check_reset(SCpnt, devip))) 404 break; 405 upper_blk = 0; 406 if ((*cmd) == WRITE_16) { 407 upper_blk = cmd[5] + (cmd[4] << 8) + 408 (cmd[3] << 16) + (cmd[2] << 24); 409 block = cmd[9] + (cmd[8] << 8) + 410 (cmd[7] << 16) + (cmd[6] << 24); 411 num = cmd[13] + (cmd[12] << 8) + 412 (cmd[11] << 16) + (cmd[10] << 24); 413 } else if ((*cmd) == WRITE_12) { 414 block = cmd[5] + (cmd[4] << 8) + 415 (cmd[3] << 16) + (cmd[2] << 24); 416 num = cmd[9] + (cmd[8] << 8) + 417 (cmd[7] << 16) + (cmd[6] << 24); 418 } else if ((*cmd) == WRITE_10) { 419 block = cmd[5] + (cmd[4] << 8) + 420 (cmd[3] << 16) + (cmd[2] << 24); 421 num = cmd[8] + (cmd[7] << 8); 422 } else { 423 block = cmd[3] + (cmd[2] << 8) + 424 ((cmd[1] & 0x1f) << 16); 425 num = cmd[4]; 426 } 427 errsts = resp_write(SCpnt, upper_blk, block, num, devip); 428 if (inj_recovered && (0 == errsts)) { 429 mk_sense_buffer(devip, RECOVERED_ERROR, 430 THRESHHOLD_EXCEEDED, 0); 431 errsts = check_condition_result; 432 } 433 break; 434 case MODE_SENSE: 435 case MODE_SENSE_10: 436 errsts = resp_mode_sense(SCpnt, target, devip); 437 break; 438 case SYNCHRONIZE_CACHE: 439 errsts = check_reset(SCpnt, devip); 440 break; 441 default: 442 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 443 printk(KERN_INFO "scsi_debug: Opcode: 0x%x not " 444 "supported\n", *cmd); 445 if ((errsts = check_reset(SCpnt, devip))) 446 break; /* Unit attention takes precedence */ 447 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0); 448 errsts = check_condition_result; 449 break; 450 } 451 return schedule_resp(SCpnt, devip, done, errsts, scsi_debug_delay); 452 } 453 454 static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg) 455 { 456 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) { 457 printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd); 458 } 459 return -EINVAL; 460 /* return -ENOTTY; // correct return but upsets fdisk */ 461 } 462 463 static int check_reset(struct scsi_cmnd * SCpnt, struct sdebug_dev_info * devip) 464 { 465 if (devip->reset) { 466 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 467 printk(KERN_INFO "scsi_debug: Reporting Unit " 468 "attention: power on reset\n"); 469 devip->reset = 0; 470 mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0); 471 return check_condition_result; 472 } 473 return 0; 474 } 475 476 /* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */ 477 static int fill_from_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr, 478 int arr_len) 479 { 480 int k, req_len, act_len, len, active; 481 void * kaddr; 482 void * kaddr_off; 483 struct scatterlist * sgpnt; 484 485 if (0 == scp->request_bufflen) 486 return 0; 487 if (NULL == scp->request_buffer) 488 return (DID_ERROR << 16); 489 if (! ((scp->sc_data_direction == DMA_BIDIRECTIONAL) || 490 (scp->sc_data_direction == DMA_FROM_DEVICE))) 491 return (DID_ERROR << 16); 492 if (0 == scp->use_sg) { 493 req_len = scp->request_bufflen; 494 act_len = (req_len < arr_len) ? req_len : arr_len; 495 memcpy(scp->request_buffer, arr, act_len); 496 scp->resid = req_len - act_len; 497 return 0; 498 } 499 sgpnt = (struct scatterlist *)scp->request_buffer; 500 active = 1; 501 for (k = 0, req_len = 0, act_len = 0; k < scp->use_sg; ++k, ++sgpnt) { 502 if (active) { 503 kaddr = (unsigned char *) 504 kmap_atomic(sgpnt->page, KM_USER0); 505 if (NULL == kaddr) 506 return (DID_ERROR << 16); 507 kaddr_off = (unsigned char *)kaddr + sgpnt->offset; 508 len = sgpnt->length; 509 if ((req_len + len) > arr_len) { 510 active = 0; 511 len = arr_len - req_len; 512 } 513 memcpy(kaddr_off, arr + req_len, len); 514 kunmap_atomic(kaddr, KM_USER0); 515 act_len += len; 516 } 517 req_len += sgpnt->length; 518 } 519 scp->resid = req_len - act_len; 520 return 0; 521 } 522 523 /* Returns number of bytes fetched into 'arr' or -1 if error. */ 524 static int fetch_to_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr, 525 int max_arr_len) 526 { 527 int k, req_len, len, fin; 528 void * kaddr; 529 void * kaddr_off; 530 struct scatterlist * sgpnt; 531 532 if (0 == scp->request_bufflen) 533 return 0; 534 if (NULL == scp->request_buffer) 535 return -1; 536 if (! ((scp->sc_data_direction == DMA_BIDIRECTIONAL) || 537 (scp->sc_data_direction == DMA_TO_DEVICE))) 538 return -1; 539 if (0 == scp->use_sg) { 540 req_len = scp->request_bufflen; 541 len = (req_len < max_arr_len) ? req_len : max_arr_len; 542 memcpy(arr, scp->request_buffer, len); 543 return len; 544 } 545 sgpnt = (struct scatterlist *)scp->request_buffer; 546 for (k = 0, req_len = 0, fin = 0; k < scp->use_sg; ++k, ++sgpnt) { 547 kaddr = (unsigned char *)kmap_atomic(sgpnt->page, KM_USER0); 548 if (NULL == kaddr) 549 return -1; 550 kaddr_off = (unsigned char *)kaddr + sgpnt->offset; 551 len = sgpnt->length; 552 if ((req_len + len) > max_arr_len) { 553 len = max_arr_len - req_len; 554 fin = 1; 555 } 556 memcpy(arr + req_len, kaddr_off, len); 557 kunmap_atomic(kaddr, KM_USER0); 558 if (fin) 559 return req_len + len; 560 req_len += sgpnt->length; 561 } 562 return req_len; 563 } 564 565 566 static const char * inq_vendor_id = "Linux "; 567 static const char * inq_product_id = "scsi_debug "; 568 static const char * inq_product_rev = "0004"; 569 570 static int inquiry_evpd_83(unsigned char * arr, int dev_id_num, 571 const char * dev_id_str, int dev_id_str_len) 572 { 573 int num; 574 575 /* Two identification descriptors: */ 576 /* T10 vendor identifier field format (faked) */ 577 arr[0] = 0x2; /* ASCII */ 578 arr[1] = 0x1; 579 arr[2] = 0x0; 580 memcpy(&arr[4], inq_vendor_id, 8); 581 memcpy(&arr[12], inq_product_id, 16); 582 memcpy(&arr[28], dev_id_str, dev_id_str_len); 583 num = 8 + 16 + dev_id_str_len; 584 arr[3] = num; 585 num += 4; 586 /* NAA IEEE registered identifier (faked) */ 587 arr[num] = 0x1; /* binary */ 588 arr[num + 1] = 0x3; 589 arr[num + 2] = 0x0; 590 arr[num + 3] = 0x8; 591 arr[num + 4] = 0x51; /* ieee company id=0x123456 (faked) */ 592 arr[num + 5] = 0x23; 593 arr[num + 6] = 0x45; 594 arr[num + 7] = 0x60; 595 arr[num + 8] = (dev_id_num >> 24); 596 arr[num + 9] = (dev_id_num >> 16) & 0xff; 597 arr[num + 10] = (dev_id_num >> 8) & 0xff; 598 arr[num + 11] = dev_id_num & 0xff; 599 return num + 12; 600 } 601 602 603 #define SDEBUG_LONG_INQ_SZ 96 604 #define SDEBUG_MAX_INQ_ARR_SZ 128 605 606 static int resp_inquiry(struct scsi_cmnd * scp, int target, 607 struct sdebug_dev_info * devip) 608 { 609 unsigned char pq_pdt; 610 unsigned char arr[SDEBUG_MAX_INQ_ARR_SZ]; 611 unsigned char *cmd = (unsigned char *)scp->cmnd; 612 int alloc_len; 613 614 alloc_len = (cmd[3] << 8) + cmd[4]; 615 memset(arr, 0, SDEBUG_MAX_INQ_ARR_SZ); 616 pq_pdt = (scsi_debug_ptype & 0x1f); 617 arr[0] = pq_pdt; 618 if (0x2 & cmd[1]) { /* CMDDT bit set */ 619 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 620 0); 621 return check_condition_result; 622 } else if (0x1 & cmd[1]) { /* EVPD bit set */ 623 int dev_id_num, len; 624 char dev_id_str[6]; 625 626 dev_id_num = ((devip->sdbg_host->shost->host_no + 1) * 2000) + 627 (devip->target * 1000) + devip->lun; 628 len = scnprintf(dev_id_str, 6, "%d", dev_id_num); 629 if (0 == cmd[2]) { /* supported vital product data pages */ 630 arr[3] = 3; 631 arr[4] = 0x0; /* this page */ 632 arr[5] = 0x80; /* unit serial number */ 633 arr[6] = 0x83; /* device identification */ 634 } else if (0x80 == cmd[2]) { /* unit serial number */ 635 arr[1] = 0x80; 636 arr[3] = len; 637 memcpy(&arr[4], dev_id_str, len); 638 } else if (0x83 == cmd[2]) { /* device identification */ 639 arr[1] = 0x83; 640 arr[3] = inquiry_evpd_83(&arr[4], dev_id_num, 641 dev_id_str, len); 642 } else { 643 /* Illegal request, invalid field in cdb */ 644 mk_sense_buffer(devip, ILLEGAL_REQUEST, 645 INVALID_FIELD_IN_CDB, 0); 646 return check_condition_result; 647 } 648 return fill_from_dev_buffer(scp, arr, 649 min(alloc_len, SDEBUG_MAX_INQ_ARR_SZ)); 650 } 651 /* drops through here for a standard inquiry */ 652 arr[1] = DEV_REMOVEABLE(target) ? 0x80 : 0; /* Removable disk */ 653 arr[2] = scsi_debug_scsi_level; 654 arr[3] = 2; /* response_data_format==2 */ 655 arr[4] = SDEBUG_LONG_INQ_SZ - 5; 656 arr[6] = 0x1; /* claim: ADDR16 */ 657 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */ 658 arr[7] = 0x3a; /* claim: WBUS16, SYNC, LINKED + CMDQUE */ 659 memcpy(&arr[8], inq_vendor_id, 8); 660 memcpy(&arr[16], inq_product_id, 16); 661 memcpy(&arr[32], inq_product_rev, 4); 662 /* version descriptors (2 bytes each) follow */ 663 arr[58] = 0x0; arr[59] = 0x40; /* SAM-2 */ 664 arr[60] = 0x3; arr[61] = 0x0; /* SPC-3 */ 665 if (scsi_debug_ptype == 0) { 666 arr[62] = 0x1; arr[63] = 0x80; /* SBC */ 667 } else if (scsi_debug_ptype == 1) { 668 arr[62] = 0x2; arr[63] = 0x00; /* SSC */ 669 } 670 return fill_from_dev_buffer(scp, arr, 671 min(alloc_len, SDEBUG_LONG_INQ_SZ)); 672 } 673 674 static int resp_requests(struct scsi_cmnd * scp, 675 struct sdebug_dev_info * devip) 676 { 677 unsigned char * sbuff; 678 unsigned char *cmd = (unsigned char *)scp->cmnd; 679 unsigned char arr[SDEBUG_SENSE_LEN]; 680 int len = 18; 681 682 memset(arr, 0, SDEBUG_SENSE_LEN); 683 if (devip->reset == 1) 684 mk_sense_buffer(devip, 0, NO_ADDED_SENSE, 0); 685 sbuff = devip->sense_buff; 686 if ((cmd[1] & 1) && (! scsi_debug_dsense)) { 687 /* DESC bit set and sense_buff in fixed format */ 688 arr[0] = 0x72; 689 arr[1] = sbuff[2]; /* sense key */ 690 arr[2] = sbuff[12]; /* asc */ 691 arr[3] = sbuff[13]; /* ascq */ 692 len = 8; 693 } else 694 memcpy(arr, sbuff, SDEBUG_SENSE_LEN); 695 mk_sense_buffer(devip, 0, NO_ADDED_SENSE, 0); 696 return fill_from_dev_buffer(scp, arr, len); 697 } 698 699 #define SDEBUG_READCAP_ARR_SZ 8 700 static int resp_readcap(struct scsi_cmnd * scp, 701 struct sdebug_dev_info * devip) 702 { 703 unsigned char arr[SDEBUG_READCAP_ARR_SZ]; 704 unsigned long capac; 705 int errsts; 706 707 if ((errsts = check_reset(scp, devip))) 708 return errsts; 709 memset(arr, 0, SDEBUG_READCAP_ARR_SZ); 710 capac = (unsigned long)sdebug_capacity - 1; 711 arr[0] = (capac >> 24); 712 arr[1] = (capac >> 16) & 0xff; 713 arr[2] = (capac >> 8) & 0xff; 714 arr[3] = capac & 0xff; 715 arr[6] = (SECT_SIZE_PER(target) >> 8) & 0xff; 716 arr[7] = SECT_SIZE_PER(target) & 0xff; 717 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ); 718 } 719 720 /* <<Following mode page info copied from ST318451LW>> */ 721 722 static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target) 723 { /* Read-Write Error Recovery page for mode_sense */ 724 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0, 725 5, 0, 0xff, 0xff}; 726 727 memcpy(p, err_recov_pg, sizeof(err_recov_pg)); 728 if (1 == pcontrol) 729 memset(p + 2, 0, sizeof(err_recov_pg) - 2); 730 return sizeof(err_recov_pg); 731 } 732 733 static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target) 734 { /* Disconnect-Reconnect page for mode_sense */ 735 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0, 736 0, 0, 0, 0, 0, 0, 0, 0}; 737 738 memcpy(p, disconnect_pg, sizeof(disconnect_pg)); 739 if (1 == pcontrol) 740 memset(p + 2, 0, sizeof(disconnect_pg) - 2); 741 return sizeof(disconnect_pg); 742 } 743 744 static int resp_format_pg(unsigned char * p, int pcontrol, int target) 745 { /* Format device page for mode_sense */ 746 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0, 747 0, 0, 0, 0, 0, 0, 0, 0, 748 0, 0, 0, 0, 0x40, 0, 0, 0}; 749 750 memcpy(p, format_pg, sizeof(format_pg)); 751 p[10] = (sdebug_sectors_per >> 8) & 0xff; 752 p[11] = sdebug_sectors_per & 0xff; 753 p[12] = (SECT_SIZE >> 8) & 0xff; 754 p[13] = SECT_SIZE & 0xff; 755 if (DEV_REMOVEABLE(target)) 756 p[20] |= 0x20; /* should agree with INQUIRY */ 757 if (1 == pcontrol) 758 memset(p + 2, 0, sizeof(format_pg) - 2); 759 return sizeof(format_pg); 760 } 761 762 static int resp_caching_pg(unsigned char * p, int pcontrol, int target) 763 { /* Caching page for mode_sense */ 764 unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, 765 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0}; 766 767 memcpy(p, caching_pg, sizeof(caching_pg)); 768 if (1 == pcontrol) 769 memset(p + 2, 0, sizeof(caching_pg) - 2); 770 return sizeof(caching_pg); 771 } 772 773 static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target) 774 { /* Control mode page for mode_sense */ 775 unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, 776 0, 0, 0x2, 0x4b}; 777 778 if (scsi_debug_dsense) 779 ctrl_m_pg[2] |= 0x4; 780 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg)); 781 if (1 == pcontrol) 782 memset(p + 2, 0, sizeof(ctrl_m_pg) - 2); 783 return sizeof(ctrl_m_pg); 784 } 785 786 static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target) 787 { /* Informational Exceptions control mode page for mode_sense */ 788 unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, 789 0, 0, 0x0, 0x0}; 790 memcpy(p, iec_m_pg, sizeof(iec_m_pg)); 791 if (1 == pcontrol) 792 memset(p + 2, 0, sizeof(iec_m_pg) - 2); 793 return sizeof(iec_m_pg); 794 } 795 796 #define SDEBUG_MAX_MSENSE_SZ 256 797 798 static int resp_mode_sense(struct scsi_cmnd * scp, int target, 799 struct sdebug_dev_info * devip) 800 { 801 unsigned char dbd; 802 int pcontrol, pcode, subpcode; 803 unsigned char dev_spec; 804 int alloc_len, msense_6, offset, len, errsts; 805 unsigned char * ap; 806 unsigned char arr[SDEBUG_MAX_MSENSE_SZ]; 807 unsigned char *cmd = (unsigned char *)scp->cmnd; 808 809 if ((errsts = check_reset(scp, devip))) 810 return errsts; 811 dbd = cmd[1] & 0x8; 812 pcontrol = (cmd[2] & 0xc0) >> 6; 813 pcode = cmd[2] & 0x3f; 814 subpcode = cmd[3]; 815 msense_6 = (MODE_SENSE == cmd[0]); 816 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]); 817 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ); 818 if (0x3 == pcontrol) { /* Saving values not supported */ 819 mk_sense_buffer(devip, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 820 0); 821 return check_condition_result; 822 } 823 dev_spec = DEV_READONLY(target) ? 0x80 : 0x0; 824 if (msense_6) { 825 arr[2] = dev_spec; 826 offset = 4; 827 } else { 828 arr[3] = dev_spec; 829 offset = 8; 830 } 831 ap = arr + offset; 832 833 if (0 != subpcode) { /* TODO: Control Extension page */ 834 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 835 0); 836 return check_condition_result; 837 } 838 switch (pcode) { 839 case 0x1: /* Read-Write error recovery page, direct access */ 840 len = resp_err_recov_pg(ap, pcontrol, target); 841 offset += len; 842 break; 843 case 0x2: /* Disconnect-Reconnect page, all devices */ 844 len = resp_disconnect_pg(ap, pcontrol, target); 845 offset += len; 846 break; 847 case 0x3: /* Format device page, direct access */ 848 len = resp_format_pg(ap, pcontrol, target); 849 offset += len; 850 break; 851 case 0x8: /* Caching page, direct access */ 852 len = resp_caching_pg(ap, pcontrol, target); 853 offset += len; 854 break; 855 case 0xa: /* Control Mode page, all devices */ 856 len = resp_ctrl_m_pg(ap, pcontrol, target); 857 offset += len; 858 break; 859 case 0x1c: /* Informational Exceptions Mode page, all devices */ 860 len = resp_iec_m_pg(ap, pcontrol, target); 861 offset += len; 862 break; 863 case 0x3f: /* Read all Mode pages */ 864 len = resp_err_recov_pg(ap, pcontrol, target); 865 len += resp_disconnect_pg(ap + len, pcontrol, target); 866 len += resp_format_pg(ap + len, pcontrol, target); 867 len += resp_caching_pg(ap + len, pcontrol, target); 868 len += resp_ctrl_m_pg(ap + len, pcontrol, target); 869 len += resp_iec_m_pg(ap + len, pcontrol, target); 870 offset += len; 871 break; 872 default: 873 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 874 0); 875 return check_condition_result; 876 } 877 if (msense_6) 878 arr[0] = offset - 1; 879 else { 880 arr[0] = ((offset - 2) >> 8) & 0xff; 881 arr[1] = (offset - 2) & 0xff; 882 } 883 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset)); 884 } 885 886 static int resp_read(struct scsi_cmnd * SCpnt, int upper_blk, int block, 887 int num, struct sdebug_dev_info * devip) 888 { 889 unsigned long iflags; 890 int ret; 891 892 if (upper_blk || (block + num > sdebug_capacity)) { 893 mk_sense_buffer(devip, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, 894 0); 895 return check_condition_result; 896 } 897 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) && 898 (block <= OPT_MEDIUM_ERR_ADDR) && 899 ((block + num) > OPT_MEDIUM_ERR_ADDR)) { 900 mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 901 0); 902 /* claim unrecoverable read error */ 903 return check_condition_result; 904 } 905 read_lock_irqsave(&atomic_rw, iflags); 906 ret = fill_from_dev_buffer(SCpnt, fake_storep + (block * SECT_SIZE), 907 num * SECT_SIZE); 908 read_unlock_irqrestore(&atomic_rw, iflags); 909 return ret; 910 } 911 912 static int resp_write(struct scsi_cmnd * SCpnt, int upper_blk, int block, 913 int num, struct sdebug_dev_info * devip) 914 { 915 unsigned long iflags; 916 int res; 917 918 if (upper_blk || (block + num > sdebug_capacity)) { 919 mk_sense_buffer(devip, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, 920 0); 921 return check_condition_result; 922 } 923 924 write_lock_irqsave(&atomic_rw, iflags); 925 res = fetch_to_dev_buffer(SCpnt, fake_storep + (block * SECT_SIZE), 926 num * SECT_SIZE); 927 write_unlock_irqrestore(&atomic_rw, iflags); 928 if (-1 == res) 929 return (DID_ERROR << 16); 930 else if ((res < (num * SECT_SIZE)) && 931 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) 932 printk(KERN_INFO "scsi_debug: write: cdb indicated=%d, " 933 " IO sent=%d bytes\n", num * SECT_SIZE, res); 934 return 0; 935 } 936 937 #define SDEBUG_RLUN_ARR_SZ 128 938 939 static int resp_report_luns(struct scsi_cmnd * scp, 940 struct sdebug_dev_info * devip) 941 { 942 unsigned int alloc_len; 943 int lun_cnt, i, upper; 944 unsigned char *cmd = (unsigned char *)scp->cmnd; 945 int select_report = (int)cmd[2]; 946 struct scsi_lun *one_lun; 947 unsigned char arr[SDEBUG_RLUN_ARR_SZ]; 948 949 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24); 950 if ((alloc_len < 16) || (select_report > 2)) { 951 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 952 0); 953 return check_condition_result; 954 } 955 /* can produce response with up to 16k luns (lun 0 to lun 16383) */ 956 memset(arr, 0, SDEBUG_RLUN_ARR_SZ); 957 lun_cnt = scsi_debug_max_luns; 958 arr[2] = ((sizeof(struct scsi_lun) * lun_cnt) >> 8) & 0xff; 959 arr[3] = (sizeof(struct scsi_lun) * lun_cnt) & 0xff; 960 lun_cnt = min((int)((SDEBUG_RLUN_ARR_SZ - 8) / 961 sizeof(struct scsi_lun)), lun_cnt); 962 one_lun = (struct scsi_lun *) &arr[8]; 963 for (i = 0; i < lun_cnt; i++) { 964 upper = (i >> 8) & 0x3f; 965 if (upper) 966 one_lun[i].scsi_lun[0] = 967 (upper | (SAM2_LUN_ADDRESS_METHOD << 6)); 968 one_lun[i].scsi_lun[1] = i & 0xff; 969 } 970 return fill_from_dev_buffer(scp, arr, 971 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ)); 972 } 973 974 /* When timer goes off this function is called. */ 975 static void timer_intr_handler(unsigned long indx) 976 { 977 struct sdebug_queued_cmd * sqcp; 978 unsigned long iflags; 979 980 if (indx >= SCSI_DEBUG_CANQUEUE) { 981 printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too " 982 "large\n"); 983 return; 984 } 985 spin_lock_irqsave(&queued_arr_lock, iflags); 986 sqcp = &queued_arr[(int)indx]; 987 if (! sqcp->in_use) { 988 printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected " 989 "interrupt\n"); 990 spin_unlock_irqrestore(&queued_arr_lock, iflags); 991 return; 992 } 993 sqcp->in_use = 0; 994 if (sqcp->done_funct) { 995 sqcp->a_cmnd->result = sqcp->scsi_result; 996 sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */ 997 } 998 sqcp->done_funct = NULL; 999 spin_unlock_irqrestore(&queued_arr_lock, iflags); 1000 } 1001 1002 static int scsi_debug_slave_alloc(struct scsi_device * sdp) 1003 { 1004 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 1005 sdev_printk(KERN_INFO, sdp, "scsi_debug: slave_alloc\n"); 1006 return 0; 1007 } 1008 1009 static int scsi_debug_slave_configure(struct scsi_device * sdp) 1010 { 1011 struct sdebug_dev_info * devip; 1012 1013 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 1014 sdev_printk(KERN_INFO, sdp, "scsi_debug: slave_configure\n"); 1015 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN) 1016 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN; 1017 devip = devInfoReg(sdp); 1018 sdp->hostdata = devip; 1019 if (sdp->host->cmd_per_lun) 1020 scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING, 1021 sdp->host->cmd_per_lun); 1022 return 0; 1023 } 1024 1025 static void scsi_debug_slave_destroy(struct scsi_device * sdp) 1026 { 1027 struct sdebug_dev_info * devip = 1028 (struct sdebug_dev_info *)sdp->hostdata; 1029 1030 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 1031 sdev_printk(KERN_INFO, sdp, "scsi_debug: slave_destroy\n"); 1032 if (devip) { 1033 /* make this slot avaliable for re-use */ 1034 devip->used = 0; 1035 sdp->hostdata = NULL; 1036 } 1037 } 1038 1039 static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev) 1040 { 1041 struct sdebug_host_info * sdbg_host; 1042 struct sdebug_dev_info * open_devip = NULL; 1043 struct sdebug_dev_info * devip = 1044 (struct sdebug_dev_info *)sdev->hostdata; 1045 1046 if (devip) 1047 return devip; 1048 sdbg_host = *(struct sdebug_host_info **) sdev->host->hostdata; 1049 if(! sdbg_host) { 1050 printk(KERN_ERR "Host info NULL\n"); 1051 return NULL; 1052 } 1053 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { 1054 if ((devip->used) && (devip->channel == sdev->channel) && 1055 (devip->target == sdev->id) && 1056 (devip->lun == sdev->lun)) 1057 return devip; 1058 else { 1059 if ((!devip->used) && (!open_devip)) 1060 open_devip = devip; 1061 } 1062 } 1063 if (NULL == open_devip) { /* try and make a new one */ 1064 open_devip = kzalloc(sizeof(*open_devip),GFP_KERNEL); 1065 if (NULL == open_devip) { 1066 printk(KERN_ERR "%s: out of memory at line %d\n", 1067 __FUNCTION__, __LINE__); 1068 return NULL; 1069 } 1070 open_devip->sdbg_host = sdbg_host; 1071 list_add_tail(&open_devip->dev_list, 1072 &sdbg_host->dev_info_list); 1073 } 1074 if (open_devip) { 1075 open_devip->channel = sdev->channel; 1076 open_devip->target = sdev->id; 1077 open_devip->lun = sdev->lun; 1078 open_devip->sdbg_host = sdbg_host; 1079 open_devip->reset = 1; 1080 open_devip->used = 1; 1081 memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN); 1082 if (scsi_debug_dsense) 1083 open_devip->sense_buff[0] = 0x72; 1084 else { 1085 open_devip->sense_buff[0] = 0x70; 1086 open_devip->sense_buff[7] = 0xa; 1087 } 1088 return open_devip; 1089 } 1090 return NULL; 1091 } 1092 1093 static void mk_sense_buffer(struct sdebug_dev_info * devip, int key, 1094 int asc, int asq) 1095 { 1096 unsigned char * sbuff; 1097 1098 sbuff = devip->sense_buff; 1099 memset(sbuff, 0, SDEBUG_SENSE_LEN); 1100 if (scsi_debug_dsense) { 1101 sbuff[0] = 0x72; /* descriptor, current */ 1102 sbuff[1] = key; 1103 sbuff[2] = asc; 1104 sbuff[3] = asq; 1105 } else { 1106 sbuff[0] = 0x70; /* fixed, current */ 1107 sbuff[2] = key; 1108 sbuff[7] = 0xa; /* implies 18 byte sense buffer */ 1109 sbuff[12] = asc; 1110 sbuff[13] = asq; 1111 } 1112 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 1113 printk(KERN_INFO "scsi_debug: [sense_key,asc,ascq]: " 1114 "[0x%x,0x%x,0x%x]\n", key, asc, asq); 1115 } 1116 1117 static int scsi_debug_abort(struct scsi_cmnd * SCpnt) 1118 { 1119 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 1120 printk(KERN_INFO "scsi_debug: abort\n"); 1121 ++num_aborts; 1122 stop_queued_cmnd(SCpnt); 1123 return SUCCESS; 1124 } 1125 1126 static int scsi_debug_biosparam(struct scsi_device *sdev, 1127 struct block_device * bdev, sector_t capacity, int *info) 1128 { 1129 int res; 1130 unsigned char *buf; 1131 1132 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 1133 printk(KERN_INFO "scsi_debug: biosparam\n"); 1134 buf = scsi_bios_ptable(bdev); 1135 if (buf) { 1136 res = scsi_partsize(buf, capacity, 1137 &info[2], &info[0], &info[1]); 1138 kfree(buf); 1139 if (! res) 1140 return res; 1141 } 1142 info[0] = sdebug_heads; 1143 info[1] = sdebug_sectors_per; 1144 info[2] = sdebug_cylinders_per; 1145 return 0; 1146 } 1147 1148 static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt) 1149 { 1150 struct sdebug_dev_info * devip; 1151 1152 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 1153 printk(KERN_INFO "scsi_debug: device_reset\n"); 1154 ++num_dev_resets; 1155 if (SCpnt) { 1156 devip = devInfoReg(SCpnt->device); 1157 if (devip) 1158 devip->reset = 1; 1159 } 1160 return SUCCESS; 1161 } 1162 1163 static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt) 1164 { 1165 struct sdebug_host_info *sdbg_host; 1166 struct sdebug_dev_info * dev_info; 1167 struct scsi_device * sdp; 1168 struct Scsi_Host * hp; 1169 1170 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 1171 printk(KERN_INFO "scsi_debug: bus_reset\n"); 1172 ++num_bus_resets; 1173 if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) { 1174 sdbg_host = *(struct sdebug_host_info **) hp->hostdata; 1175 if (sdbg_host) { 1176 list_for_each_entry(dev_info, 1177 &sdbg_host->dev_info_list, 1178 dev_list) 1179 dev_info->reset = 1; 1180 } 1181 } 1182 return SUCCESS; 1183 } 1184 1185 static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt) 1186 { 1187 struct sdebug_host_info * sdbg_host; 1188 struct sdebug_dev_info * dev_info; 1189 1190 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 1191 printk(KERN_INFO "scsi_debug: host_reset\n"); 1192 ++num_host_resets; 1193 spin_lock(&sdebug_host_list_lock); 1194 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { 1195 list_for_each_entry(dev_info, &sdbg_host->dev_info_list, 1196 dev_list) 1197 dev_info->reset = 1; 1198 } 1199 spin_unlock(&sdebug_host_list_lock); 1200 stop_all_queued(); 1201 return SUCCESS; 1202 } 1203 1204 /* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */ 1205 static int stop_queued_cmnd(struct scsi_cmnd * cmnd) 1206 { 1207 unsigned long iflags; 1208 int k; 1209 struct sdebug_queued_cmd * sqcp; 1210 1211 spin_lock_irqsave(&queued_arr_lock, iflags); 1212 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) { 1213 sqcp = &queued_arr[k]; 1214 if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) { 1215 del_timer_sync(&sqcp->cmnd_timer); 1216 sqcp->in_use = 0; 1217 sqcp->a_cmnd = NULL; 1218 break; 1219 } 1220 } 1221 spin_unlock_irqrestore(&queued_arr_lock, iflags); 1222 return (k < SCSI_DEBUG_CANQUEUE) ? 1 : 0; 1223 } 1224 1225 /* Deletes (stops) timers of all queued commands */ 1226 static void stop_all_queued(void) 1227 { 1228 unsigned long iflags; 1229 int k; 1230 struct sdebug_queued_cmd * sqcp; 1231 1232 spin_lock_irqsave(&queued_arr_lock, iflags); 1233 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) { 1234 sqcp = &queued_arr[k]; 1235 if (sqcp->in_use && sqcp->a_cmnd) { 1236 del_timer_sync(&sqcp->cmnd_timer); 1237 sqcp->in_use = 0; 1238 sqcp->a_cmnd = NULL; 1239 } 1240 } 1241 spin_unlock_irqrestore(&queued_arr_lock, iflags); 1242 } 1243 1244 /* Initializes timers in queued array */ 1245 static void __init init_all_queued(void) 1246 { 1247 unsigned long iflags; 1248 int k; 1249 struct sdebug_queued_cmd * sqcp; 1250 1251 spin_lock_irqsave(&queued_arr_lock, iflags); 1252 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) { 1253 sqcp = &queued_arr[k]; 1254 init_timer(&sqcp->cmnd_timer); 1255 sqcp->in_use = 0; 1256 sqcp->a_cmnd = NULL; 1257 } 1258 spin_unlock_irqrestore(&queued_arr_lock, iflags); 1259 } 1260 1261 static void __init sdebug_build_parts(unsigned char * ramp) 1262 { 1263 struct partition * pp; 1264 int starts[SDEBUG_MAX_PARTS + 2]; 1265 int sectors_per_part, num_sectors, k; 1266 int heads_by_sects, start_sec, end_sec; 1267 1268 /* assume partition table already zeroed */ 1269 if ((scsi_debug_num_parts < 1) || (sdebug_store_size < 1048576)) 1270 return; 1271 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) { 1272 scsi_debug_num_parts = SDEBUG_MAX_PARTS; 1273 printk(KERN_WARNING "scsi_debug:build_parts: reducing " 1274 "partitions to %d\n", SDEBUG_MAX_PARTS); 1275 } 1276 num_sectors = (int)(sdebug_store_size / SECT_SIZE); 1277 sectors_per_part = (num_sectors - sdebug_sectors_per) 1278 / scsi_debug_num_parts; 1279 heads_by_sects = sdebug_heads * sdebug_sectors_per; 1280 starts[0] = sdebug_sectors_per; 1281 for (k = 1; k < scsi_debug_num_parts; ++k) 1282 starts[k] = ((k * sectors_per_part) / heads_by_sects) 1283 * heads_by_sects; 1284 starts[scsi_debug_num_parts] = num_sectors; 1285 starts[scsi_debug_num_parts + 1] = 0; 1286 1287 ramp[510] = 0x55; /* magic partition markings */ 1288 ramp[511] = 0xAA; 1289 pp = (struct partition *)(ramp + 0x1be); 1290 for (k = 0; starts[k + 1]; ++k, ++pp) { 1291 start_sec = starts[k]; 1292 end_sec = starts[k + 1] - 1; 1293 pp->boot_ind = 0; 1294 1295 pp->cyl = start_sec / heads_by_sects; 1296 pp->head = (start_sec - (pp->cyl * heads_by_sects)) 1297 / sdebug_sectors_per; 1298 pp->sector = (start_sec % sdebug_sectors_per) + 1; 1299 1300 pp->end_cyl = end_sec / heads_by_sects; 1301 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects)) 1302 / sdebug_sectors_per; 1303 pp->end_sector = (end_sec % sdebug_sectors_per) + 1; 1304 1305 pp->start_sect = start_sec; 1306 pp->nr_sects = end_sec - start_sec + 1; 1307 pp->sys_ind = 0x83; /* plain Linux partition */ 1308 } 1309 } 1310 1311 static int schedule_resp(struct scsi_cmnd * cmnd, 1312 struct sdebug_dev_info * devip, 1313 done_funct_t done, int scsi_result, int delta_jiff) 1314 { 1315 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) { 1316 if (scsi_result) { 1317 struct scsi_device * sdp = cmnd->device; 1318 1319 sdev_printk(KERN_INFO, sdp, 1320 "non-zero result=0x%x\n", 1321 scsi_result); 1322 } 1323 } 1324 if (cmnd && devip) { 1325 /* simulate autosense by this driver */ 1326 if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff)) 1327 memcpy(cmnd->sense_buffer, devip->sense_buff, 1328 (SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ? 1329 SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE); 1330 } 1331 if (delta_jiff <= 0) { 1332 if (cmnd) 1333 cmnd->result = scsi_result; 1334 if (done) 1335 done(cmnd); 1336 return 0; 1337 } else { 1338 unsigned long iflags; 1339 int k; 1340 struct sdebug_queued_cmd * sqcp = NULL; 1341 1342 spin_lock_irqsave(&queued_arr_lock, iflags); 1343 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) { 1344 sqcp = &queued_arr[k]; 1345 if (! sqcp->in_use) 1346 break; 1347 } 1348 if (k >= SCSI_DEBUG_CANQUEUE) { 1349 spin_unlock_irqrestore(&queued_arr_lock, iflags); 1350 printk(KERN_WARNING "scsi_debug: can_queue exceeded\n"); 1351 return 1; /* report busy to mid level */ 1352 } 1353 sqcp->in_use = 1; 1354 sqcp->a_cmnd = cmnd; 1355 sqcp->scsi_result = scsi_result; 1356 sqcp->done_funct = done; 1357 sqcp->cmnd_timer.function = timer_intr_handler; 1358 sqcp->cmnd_timer.data = k; 1359 sqcp->cmnd_timer.expires = jiffies + delta_jiff; 1360 add_timer(&sqcp->cmnd_timer); 1361 spin_unlock_irqrestore(&queued_arr_lock, iflags); 1362 if (cmnd) 1363 cmnd->result = 0; 1364 return 0; 1365 } 1366 } 1367 1368 /* Set 'perm' (4th argument) to 0 to disable module_param's definition 1369 * of sysfs parameters (which module_param doesn't yet support). 1370 * Sysfs parameters defined explicitly below. 1371 */ 1372 module_param_named(add_host, scsi_debug_add_host, int, 0); /* perm=0644 */ 1373 module_param_named(delay, scsi_debug_delay, int, 0); /* perm=0644 */ 1374 module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, 0); 1375 module_param_named(dsense, scsi_debug_dsense, int, 0); 1376 module_param_named(every_nth, scsi_debug_every_nth, int, 0); 1377 module_param_named(max_luns, scsi_debug_max_luns, int, 0); 1378 module_param_named(num_parts, scsi_debug_num_parts, int, 0); 1379 module_param_named(num_tgts, scsi_debug_num_tgts, int, 0); 1380 module_param_named(opts, scsi_debug_opts, int, 0); /* perm=0644 */ 1381 module_param_named(ptype, scsi_debug_ptype, int, 0); 1382 module_param_named(scsi_level, scsi_debug_scsi_level, int, 0); 1383 1384 MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert"); 1385 MODULE_DESCRIPTION("SCSI debug adapter driver"); 1386 MODULE_LICENSE("GPL"); 1387 MODULE_VERSION(SCSI_DEBUG_VERSION); 1388 1389 MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)"); 1390 MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)"); 1391 MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs"); 1392 MODULE_PARM_DESC(dsense, "use descriptor sense format(def: fixed)"); 1393 MODULE_PARM_DESC(every_nth, "timeout every nth command(def=100)"); 1394 MODULE_PARM_DESC(max_luns, "number of SCSI LUNs per target to simulate"); 1395 MODULE_PARM_DESC(num_parts, "number of partitions(def=0)"); 1396 MODULE_PARM_DESC(num_tgts, "number of SCSI targets per host to simulate"); 1397 MODULE_PARM_DESC(opts, "1->noise, 2->medium_error, 4->..."); 1398 MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])"); 1399 MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])"); 1400 1401 1402 static char sdebug_info[256]; 1403 1404 static const char * scsi_debug_info(struct Scsi_Host * shp) 1405 { 1406 sprintf(sdebug_info, "scsi_debug, version %s [%s], " 1407 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION, 1408 scsi_debug_version_date, scsi_debug_dev_size_mb, 1409 scsi_debug_opts); 1410 return sdebug_info; 1411 } 1412 1413 /* scsi_debug_proc_info 1414 * Used if the driver currently has no own support for /proc/scsi 1415 */ 1416 static int scsi_debug_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset, 1417 int length, int inout) 1418 { 1419 int len, pos, begin; 1420 int orig_length; 1421 1422 orig_length = length; 1423 1424 if (inout == 1) { 1425 char arr[16]; 1426 int minLen = length > 15 ? 15 : length; 1427 1428 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 1429 return -EACCES; 1430 memcpy(arr, buffer, minLen); 1431 arr[minLen] = '\0'; 1432 if (1 != sscanf(arr, "%d", &pos)) 1433 return -EINVAL; 1434 scsi_debug_opts = pos; 1435 if (scsi_debug_every_nth != 0) 1436 scsi_debug_cmnd_count = 0; 1437 return length; 1438 } 1439 begin = 0; 1440 pos = len = sprintf(buffer, "scsi_debug adapter driver, version " 1441 "%s [%s]\n" 1442 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, " 1443 "every_nth=%d(curr:%d)\n" 1444 "delay=%d, max_luns=%d, scsi_level=%d\n" 1445 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n" 1446 "number of aborts=%d, device_reset=%d, bus_resets=%d, " 1447 "host_resets=%d\n", 1448 SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts, 1449 scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth, 1450 scsi_debug_cmnd_count, scsi_debug_delay, 1451 scsi_debug_max_luns, scsi_debug_scsi_level, 1452 SECT_SIZE, sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per, 1453 num_aborts, num_dev_resets, num_bus_resets, num_host_resets); 1454 if (pos < offset) { 1455 len = 0; 1456 begin = pos; 1457 } 1458 *start = buffer + (offset - begin); /* Start of wanted data */ 1459 len -= (offset - begin); 1460 if (len > length) 1461 len = length; 1462 return len; 1463 } 1464 1465 static ssize_t sdebug_delay_show(struct device_driver * ddp, char * buf) 1466 { 1467 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay); 1468 } 1469 1470 static ssize_t sdebug_delay_store(struct device_driver * ddp, 1471 const char * buf, size_t count) 1472 { 1473 int delay; 1474 char work[20]; 1475 1476 if (1 == sscanf(buf, "%10s", work)) { 1477 if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) { 1478 scsi_debug_delay = delay; 1479 return count; 1480 } 1481 } 1482 return -EINVAL; 1483 } 1484 DRIVER_ATTR(delay, S_IRUGO | S_IWUSR, sdebug_delay_show, 1485 sdebug_delay_store); 1486 1487 static ssize_t sdebug_opts_show(struct device_driver * ddp, char * buf) 1488 { 1489 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts); 1490 } 1491 1492 static ssize_t sdebug_opts_store(struct device_driver * ddp, 1493 const char * buf, size_t count) 1494 { 1495 int opts; 1496 char work[20]; 1497 1498 if (1 == sscanf(buf, "%10s", work)) { 1499 if (0 == strnicmp(work,"0x", 2)) { 1500 if (1 == sscanf(&work[2], "%x", &opts)) 1501 goto opts_done; 1502 } else { 1503 if (1 == sscanf(work, "%d", &opts)) 1504 goto opts_done; 1505 } 1506 } 1507 return -EINVAL; 1508 opts_done: 1509 scsi_debug_opts = opts; 1510 scsi_debug_cmnd_count = 0; 1511 return count; 1512 } 1513 DRIVER_ATTR(opts, S_IRUGO | S_IWUSR, sdebug_opts_show, 1514 sdebug_opts_store); 1515 1516 static ssize_t sdebug_ptype_show(struct device_driver * ddp, char * buf) 1517 { 1518 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype); 1519 } 1520 static ssize_t sdebug_ptype_store(struct device_driver * ddp, 1521 const char * buf, size_t count) 1522 { 1523 int n; 1524 1525 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 1526 scsi_debug_ptype = n; 1527 return count; 1528 } 1529 return -EINVAL; 1530 } 1531 DRIVER_ATTR(ptype, S_IRUGO | S_IWUSR, sdebug_ptype_show, sdebug_ptype_store); 1532 1533 static ssize_t sdebug_dsense_show(struct device_driver * ddp, char * buf) 1534 { 1535 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense); 1536 } 1537 static ssize_t sdebug_dsense_store(struct device_driver * ddp, 1538 const char * buf, size_t count) 1539 { 1540 int n; 1541 1542 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 1543 scsi_debug_dsense = n; 1544 return count; 1545 } 1546 return -EINVAL; 1547 } 1548 DRIVER_ATTR(dsense, S_IRUGO | S_IWUSR, sdebug_dsense_show, 1549 sdebug_dsense_store); 1550 1551 static ssize_t sdebug_num_tgts_show(struct device_driver * ddp, char * buf) 1552 { 1553 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts); 1554 } 1555 static ssize_t sdebug_num_tgts_store(struct device_driver * ddp, 1556 const char * buf, size_t count) 1557 { 1558 int n; 1559 1560 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 1561 scsi_debug_num_tgts = n; 1562 sdebug_max_tgts_luns(); 1563 return count; 1564 } 1565 return -EINVAL; 1566 } 1567 DRIVER_ATTR(num_tgts, S_IRUGO | S_IWUSR, sdebug_num_tgts_show, 1568 sdebug_num_tgts_store); 1569 1570 static ssize_t sdebug_dev_size_mb_show(struct device_driver * ddp, char * buf) 1571 { 1572 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb); 1573 } 1574 DRIVER_ATTR(dev_size_mb, S_IRUGO, sdebug_dev_size_mb_show, NULL); 1575 1576 static ssize_t sdebug_num_parts_show(struct device_driver * ddp, char * buf) 1577 { 1578 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts); 1579 } 1580 DRIVER_ATTR(num_parts, S_IRUGO, sdebug_num_parts_show, NULL); 1581 1582 static ssize_t sdebug_every_nth_show(struct device_driver * ddp, char * buf) 1583 { 1584 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth); 1585 } 1586 static ssize_t sdebug_every_nth_store(struct device_driver * ddp, 1587 const char * buf, size_t count) 1588 { 1589 int nth; 1590 1591 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) { 1592 scsi_debug_every_nth = nth; 1593 scsi_debug_cmnd_count = 0; 1594 return count; 1595 } 1596 return -EINVAL; 1597 } 1598 DRIVER_ATTR(every_nth, S_IRUGO | S_IWUSR, sdebug_every_nth_show, 1599 sdebug_every_nth_store); 1600 1601 static ssize_t sdebug_max_luns_show(struct device_driver * ddp, char * buf) 1602 { 1603 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns); 1604 } 1605 static ssize_t sdebug_max_luns_store(struct device_driver * ddp, 1606 const char * buf, size_t count) 1607 { 1608 int n; 1609 1610 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 1611 scsi_debug_max_luns = n; 1612 sdebug_max_tgts_luns(); 1613 return count; 1614 } 1615 return -EINVAL; 1616 } 1617 DRIVER_ATTR(max_luns, S_IRUGO | S_IWUSR, sdebug_max_luns_show, 1618 sdebug_max_luns_store); 1619 1620 static ssize_t sdebug_scsi_level_show(struct device_driver * ddp, char * buf) 1621 { 1622 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level); 1623 } 1624 DRIVER_ATTR(scsi_level, S_IRUGO, sdebug_scsi_level_show, NULL); 1625 1626 static ssize_t sdebug_add_host_show(struct device_driver * ddp, char * buf) 1627 { 1628 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host); 1629 } 1630 1631 static ssize_t sdebug_add_host_store(struct device_driver * ddp, 1632 const char * buf, size_t count) 1633 { 1634 int delta_hosts; 1635 char work[20]; 1636 1637 if (1 != sscanf(buf, "%10s", work)) 1638 return -EINVAL; 1639 { /* temporary hack around sscanf() problem with -ve nums */ 1640 int neg = 0; 1641 1642 if ('-' == *work) 1643 neg = 1; 1644 if (1 != sscanf(work + neg, "%d", &delta_hosts)) 1645 return -EINVAL; 1646 if (neg) 1647 delta_hosts = -delta_hosts; 1648 } 1649 if (delta_hosts > 0) { 1650 do { 1651 sdebug_add_adapter(); 1652 } while (--delta_hosts); 1653 } else if (delta_hosts < 0) { 1654 do { 1655 sdebug_remove_adapter(); 1656 } while (++delta_hosts); 1657 } 1658 return count; 1659 } 1660 DRIVER_ATTR(add_host, S_IRUGO | S_IWUSR, sdebug_add_host_show, 1661 sdebug_add_host_store); 1662 1663 static void do_create_driverfs_files(void) 1664 { 1665 driver_create_file(&sdebug_driverfs_driver, &driver_attr_add_host); 1666 driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay); 1667 driver_create_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb); 1668 driver_create_file(&sdebug_driverfs_driver, &driver_attr_dsense); 1669 driver_create_file(&sdebug_driverfs_driver, &driver_attr_every_nth); 1670 driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_luns); 1671 driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_tgts); 1672 driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_parts); 1673 driver_create_file(&sdebug_driverfs_driver, &driver_attr_ptype); 1674 driver_create_file(&sdebug_driverfs_driver, &driver_attr_opts); 1675 driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level); 1676 } 1677 1678 static void do_remove_driverfs_files(void) 1679 { 1680 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level); 1681 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_opts); 1682 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ptype); 1683 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_parts); 1684 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_tgts); 1685 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_luns); 1686 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_every_nth); 1687 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dsense); 1688 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb); 1689 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay); 1690 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host); 1691 } 1692 1693 static int __init scsi_debug_init(void) 1694 { 1695 unsigned long sz; 1696 int host_to_add; 1697 int k; 1698 1699 if (scsi_debug_dev_size_mb < 1) 1700 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */ 1701 sdebug_store_size = (unsigned long)scsi_debug_dev_size_mb * 1048576; 1702 sdebug_capacity = sdebug_store_size / SECT_SIZE; 1703 1704 /* play around with geometry, don't waste too much on track 0 */ 1705 sdebug_heads = 8; 1706 sdebug_sectors_per = 32; 1707 if (scsi_debug_dev_size_mb >= 16) 1708 sdebug_heads = 32; 1709 else if (scsi_debug_dev_size_mb >= 256) 1710 sdebug_heads = 64; 1711 sdebug_cylinders_per = (unsigned long)sdebug_capacity / 1712 (sdebug_sectors_per * sdebug_heads); 1713 if (sdebug_cylinders_per >= 1024) { 1714 /* other LLDs do this; implies >= 1GB ram disk ... */ 1715 sdebug_heads = 255; 1716 sdebug_sectors_per = 63; 1717 sdebug_cylinders_per = (unsigned long)sdebug_capacity / 1718 (sdebug_sectors_per * sdebug_heads); 1719 } 1720 1721 sz = sdebug_store_size; 1722 fake_storep = vmalloc(sz); 1723 if (NULL == fake_storep) { 1724 printk(KERN_ERR "scsi_debug_init: out of memory, 1\n"); 1725 return -ENOMEM; 1726 } 1727 memset(fake_storep, 0, sz); 1728 if (scsi_debug_num_parts > 0) 1729 sdebug_build_parts(fake_storep); 1730 1731 init_all_queued(); 1732 1733 device_register(&pseudo_primary); 1734 bus_register(&pseudo_lld_bus); 1735 driver_register(&sdebug_driverfs_driver); 1736 do_create_driverfs_files(); 1737 1738 sdebug_driver_template.proc_name = (char *)sdebug_proc_name; 1739 1740 host_to_add = scsi_debug_add_host; 1741 scsi_debug_add_host = 0; 1742 1743 for (k = 0; k < host_to_add; k++) { 1744 if (sdebug_add_adapter()) { 1745 printk(KERN_ERR "scsi_debug_init: " 1746 "sdebug_add_adapter failed k=%d\n", k); 1747 break; 1748 } 1749 } 1750 1751 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) { 1752 printk(KERN_INFO "scsi_debug_init: built %d host(s)\n", 1753 scsi_debug_add_host); 1754 } 1755 return 0; 1756 } 1757 1758 static void __exit scsi_debug_exit(void) 1759 { 1760 int k = scsi_debug_add_host; 1761 1762 stop_all_queued(); 1763 for (; k; k--) 1764 sdebug_remove_adapter(); 1765 do_remove_driverfs_files(); 1766 driver_unregister(&sdebug_driverfs_driver); 1767 bus_unregister(&pseudo_lld_bus); 1768 device_unregister(&pseudo_primary); 1769 1770 vfree(fake_storep); 1771 } 1772 1773 device_initcall(scsi_debug_init); 1774 module_exit(scsi_debug_exit); 1775 1776 static void pseudo_0_release(struct device * dev) 1777 { 1778 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 1779 printk(KERN_INFO "scsi_debug: pseudo_0_release() called\n"); 1780 } 1781 1782 static struct device pseudo_primary = { 1783 .bus_id = "pseudo_0", 1784 .release = pseudo_0_release, 1785 }; 1786 1787 static int pseudo_lld_bus_match(struct device *dev, 1788 struct device_driver *dev_driver) 1789 { 1790 return 1; 1791 } 1792 1793 static struct bus_type pseudo_lld_bus = { 1794 .name = "pseudo", 1795 .match = pseudo_lld_bus_match, 1796 .probe = sdebug_driver_probe, 1797 .remove = sdebug_driver_remove, 1798 }; 1799 1800 static void sdebug_release_adapter(struct device * dev) 1801 { 1802 struct sdebug_host_info *sdbg_host; 1803 1804 sdbg_host = to_sdebug_host(dev); 1805 kfree(sdbg_host); 1806 } 1807 1808 static int sdebug_add_adapter(void) 1809 { 1810 int k, devs_per_host; 1811 int error = 0; 1812 struct sdebug_host_info *sdbg_host; 1813 struct sdebug_dev_info *sdbg_devinfo; 1814 struct list_head *lh, *lh_sf; 1815 1816 sdbg_host = kzalloc(sizeof(*sdbg_host), GFP_KERNEL); 1817 1818 if (NULL == sdbg_host) { 1819 printk(KERN_ERR "%s: out of memory at line %d\n", 1820 __FUNCTION__, __LINE__); 1821 return -ENOMEM; 1822 } 1823 1824 INIT_LIST_HEAD(&sdbg_host->dev_info_list); 1825 1826 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns; 1827 for (k = 0; k < devs_per_host; k++) { 1828 sdbg_devinfo = kzalloc(sizeof(*sdbg_devinfo), GFP_KERNEL); 1829 if (NULL == sdbg_devinfo) { 1830 printk(KERN_ERR "%s: out of memory at line %d\n", 1831 __FUNCTION__, __LINE__); 1832 error = -ENOMEM; 1833 goto clean; 1834 } 1835 sdbg_devinfo->sdbg_host = sdbg_host; 1836 list_add_tail(&sdbg_devinfo->dev_list, 1837 &sdbg_host->dev_info_list); 1838 } 1839 1840 spin_lock(&sdebug_host_list_lock); 1841 list_add_tail(&sdbg_host->host_list, &sdebug_host_list); 1842 spin_unlock(&sdebug_host_list_lock); 1843 1844 sdbg_host->dev.bus = &pseudo_lld_bus; 1845 sdbg_host->dev.parent = &pseudo_primary; 1846 sdbg_host->dev.release = &sdebug_release_adapter; 1847 sprintf(sdbg_host->dev.bus_id, "adapter%d", scsi_debug_add_host); 1848 1849 error = device_register(&sdbg_host->dev); 1850 1851 if (error) 1852 goto clean; 1853 1854 ++scsi_debug_add_host; 1855 return error; 1856 1857 clean: 1858 list_for_each_safe(lh, lh_sf, &sdbg_host->dev_info_list) { 1859 sdbg_devinfo = list_entry(lh, struct sdebug_dev_info, 1860 dev_list); 1861 list_del(&sdbg_devinfo->dev_list); 1862 kfree(sdbg_devinfo); 1863 } 1864 1865 kfree(sdbg_host); 1866 return error; 1867 } 1868 1869 static void sdebug_remove_adapter(void) 1870 { 1871 struct sdebug_host_info * sdbg_host = NULL; 1872 1873 spin_lock(&sdebug_host_list_lock); 1874 if (!list_empty(&sdebug_host_list)) { 1875 sdbg_host = list_entry(sdebug_host_list.prev, 1876 struct sdebug_host_info, host_list); 1877 list_del(&sdbg_host->host_list); 1878 } 1879 spin_unlock(&sdebug_host_list_lock); 1880 1881 if (!sdbg_host) 1882 return; 1883 1884 device_unregister(&sdbg_host->dev); 1885 --scsi_debug_add_host; 1886 } 1887 1888 static int sdebug_driver_probe(struct device * dev) 1889 { 1890 int error = 0; 1891 struct sdebug_host_info *sdbg_host; 1892 struct Scsi_Host *hpnt; 1893 1894 sdbg_host = to_sdebug_host(dev); 1895 1896 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host)); 1897 if (NULL == hpnt) { 1898 printk(KERN_ERR "%s: scsi_register failed\n", __FUNCTION__); 1899 error = -ENODEV; 1900 return error; 1901 } 1902 1903 sdbg_host->shost = hpnt; 1904 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host; 1905 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id)) 1906 hpnt->max_id = scsi_debug_num_tgts + 1; 1907 else 1908 hpnt->max_id = scsi_debug_num_tgts; 1909 hpnt->max_lun = scsi_debug_max_luns; 1910 1911 error = scsi_add_host(hpnt, &sdbg_host->dev); 1912 if (error) { 1913 printk(KERN_ERR "%s: scsi_add_host failed\n", __FUNCTION__); 1914 error = -ENODEV; 1915 scsi_host_put(hpnt); 1916 } else 1917 scsi_scan_host(hpnt); 1918 1919 1920 return error; 1921 } 1922 1923 static int sdebug_driver_remove(struct device * dev) 1924 { 1925 struct list_head *lh, *lh_sf; 1926 struct sdebug_host_info *sdbg_host; 1927 struct sdebug_dev_info *sdbg_devinfo; 1928 1929 sdbg_host = to_sdebug_host(dev); 1930 1931 if (!sdbg_host) { 1932 printk(KERN_ERR "%s: Unable to locate host info\n", 1933 __FUNCTION__); 1934 return -ENODEV; 1935 } 1936 1937 scsi_remove_host(sdbg_host->shost); 1938 1939 list_for_each_safe(lh, lh_sf, &sdbg_host->dev_info_list) { 1940 sdbg_devinfo = list_entry(lh, struct sdebug_dev_info, 1941 dev_list); 1942 list_del(&sdbg_devinfo->dev_list); 1943 kfree(sdbg_devinfo); 1944 } 1945 1946 scsi_host_put(sdbg_host->shost); 1947 return 0; 1948 } 1949 1950 static void sdebug_max_tgts_luns(void) 1951 { 1952 struct sdebug_host_info * sdbg_host; 1953 struct Scsi_Host *hpnt; 1954 1955 spin_lock(&sdebug_host_list_lock); 1956 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { 1957 hpnt = sdbg_host->shost; 1958 if ((hpnt->this_id >= 0) && 1959 (scsi_debug_num_tgts > hpnt->this_id)) 1960 hpnt->max_id = scsi_debug_num_tgts + 1; 1961 else 1962 hpnt->max_id = scsi_debug_num_tgts; 1963 hpnt->max_lun = scsi_debug_max_luns; 1964 } 1965 spin_unlock(&sdebug_host_list_lock); 1966 } 1967