scsi_debug.c revision d986788b2653ef76441c6b6ba1787164546735a6
1/* 2 * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv 3 * Copyright (C) 1992 Eric Youngdale 4 * Simulate a host adapter with 2 disks attached. Do a lot of checking 5 * to make sure that we are not getting blocks mixed up, and PANIC if 6 * anything out of the ordinary is seen. 7 * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 8 * 9 * This version is more generic, simulating a variable number of disk 10 * (or disk like devices) sharing a common amount of RAM. To be more 11 * realistic, the simulated devices have the transport attributes of 12 * SAS disks. 13 * 14 * 15 * For documentation see http://sg.danny.cz/sg/sdebug26.html 16 * 17 * D. Gilbert (dpg) work for Magneto-Optical device test [20010421] 18 * dpg: work for devfs large number of disks [20010809] 19 * forked for lk 2.5 series [20011216, 20020101] 20 * use vmalloc() more inquiry+mode_sense [20020302] 21 * add timers for delayed responses [20020721] 22 * Patrick Mansfield <patmans@us.ibm.com> max_luns+scsi_level [20021031] 23 * Mike Anderson <andmike@us.ibm.com> sysfs work [20021118] 24 * dpg: change style of boot options to "scsi_debug.num_tgts=2" and 25 * module options to "modprobe scsi_debug num_tgts=2" [20021221] 26 */ 27 28#include <linux/module.h> 29 30#include <linux/kernel.h> 31#include <linux/errno.h> 32#include <linux/timer.h> 33#include <linux/slab.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/vmalloc.h> 41#include <linux/moduleparam.h> 42#include <linux/scatterlist.h> 43#include <linux/blkdev.h> 44#include <linux/crc-t10dif.h> 45 46#include <net/checksum.h> 47 48#include <asm/unaligned.h> 49 50#include <scsi/scsi.h> 51#include <scsi/scsi_cmnd.h> 52#include <scsi/scsi_device.h> 53#include <scsi/scsi_host.h> 54#include <scsi/scsicam.h> 55#include <scsi/scsi_eh.h> 56#include <scsi/scsi_dbg.h> 57 58#include "sd.h" 59#include "scsi_logging.h" 60 61#define SCSI_DEBUG_VERSION "1.82" 62static const char * scsi_debug_version_date = "20100324"; 63 64/* Additional Sense Code (ASC) */ 65#define NO_ADDITIONAL_SENSE 0x0 66#define LOGICAL_UNIT_NOT_READY 0x4 67#define UNRECOVERED_READ_ERR 0x11 68#define PARAMETER_LIST_LENGTH_ERR 0x1a 69#define INVALID_OPCODE 0x20 70#define ADDR_OUT_OF_RANGE 0x21 71#define INVALID_COMMAND_OPCODE 0x20 72#define INVALID_FIELD_IN_CDB 0x24 73#define INVALID_FIELD_IN_PARAM_LIST 0x26 74#define POWERON_RESET 0x29 75#define SAVING_PARAMS_UNSUP 0x39 76#define TRANSPORT_PROBLEM 0x4b 77#define THRESHOLD_EXCEEDED 0x5d 78#define LOW_POWER_COND_ON 0x5e 79 80/* Additional Sense Code Qualifier (ASCQ) */ 81#define ACK_NAK_TO 0x3 82 83#define SDEBUG_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */ 84 85/* Default values for driver parameters */ 86#define DEF_NUM_HOST 1 87#define DEF_NUM_TGTS 1 88#define DEF_MAX_LUNS 1 89/* With these defaults, this driver will make 1 host with 1 target 90 * (id 0) containing 1 logical unit (lun 0). That is 1 device. 91 */ 92#define DEF_ATO 1 93#define DEF_DELAY 1 94#define DEF_DEV_SIZE_MB 8 95#define DEF_DIF 0 96#define DEF_DIX 0 97#define DEF_D_SENSE 0 98#define DEF_EVERY_NTH 0 99#define DEF_FAKE_RW 0 100#define DEF_GUARD 0 101#define DEF_LBPU 0 102#define DEF_LBPWS 0 103#define DEF_LBPWS10 0 104#define DEF_LBPRZ 1 105#define DEF_LOWEST_ALIGNED 0 106#define DEF_NO_LUN_0 0 107#define DEF_NUM_PARTS 0 108#define DEF_OPTS 0 109#define DEF_OPT_BLKS 64 110#define DEF_PHYSBLK_EXP 0 111#define DEF_PTYPE 0 112#define DEF_REMOVABLE false 113#define DEF_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */ 114#define DEF_SECTOR_SIZE 512 115#define DEF_UNMAP_ALIGNMENT 0 116#define DEF_UNMAP_GRANULARITY 1 117#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF 118#define DEF_UNMAP_MAX_DESC 256 119#define DEF_VIRTUAL_GB 0 120#define DEF_VPD_USE_HOSTNO 1 121#define DEF_WRITESAME_LENGTH 0xFFFF 122 123/* bit mask values for scsi_debug_opts */ 124#define SCSI_DEBUG_OPT_NOISE 1 125#define SCSI_DEBUG_OPT_MEDIUM_ERR 2 126#define SCSI_DEBUG_OPT_TIMEOUT 4 127#define SCSI_DEBUG_OPT_RECOVERED_ERR 8 128#define SCSI_DEBUG_OPT_TRANSPORT_ERR 16 129#define SCSI_DEBUG_OPT_DIF_ERR 32 130#define SCSI_DEBUG_OPT_DIX_ERR 64 131#define SCSI_DEBUG_OPT_MAC_TIMEOUT 128 132/* When "every_nth" > 0 then modulo "every_nth" commands: 133 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set 134 * - a RECOVERED_ERROR is simulated on successful read and write 135 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set. 136 * - a TRANSPORT_ERROR is simulated on successful read and write 137 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set. 138 * 139 * When "every_nth" < 0 then after "- every_nth" commands: 140 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set 141 * - a RECOVERED_ERROR is simulated on successful read and write 142 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set. 143 * - a TRANSPORT_ERROR is simulated on successful read and write 144 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set. 145 * This will continue until some other action occurs (e.g. the user 146 * writing a new value (other than -1 or 1) to every_nth via sysfs). 147 */ 148 149/* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this 150 * sector on read commands: */ 151#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */ 152#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */ 153 154/* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1) 155 * or "peripheral device" addressing (value 0) */ 156#define SAM2_LUN_ADDRESS_METHOD 0 157#define SAM2_WLUN_REPORT_LUNS 0xc101 158 159/* Can queue up to this number of commands. Typically commands that 160 * that have a non-zero delay are queued. */ 161#define SCSI_DEBUG_CANQUEUE 255 162 163static int scsi_debug_add_host = DEF_NUM_HOST; 164static int scsi_debug_ato = DEF_ATO; 165static int scsi_debug_delay = DEF_DELAY; 166static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB; 167static int scsi_debug_dif = DEF_DIF; 168static int scsi_debug_dix = DEF_DIX; 169static int scsi_debug_dsense = DEF_D_SENSE; 170static int scsi_debug_every_nth = DEF_EVERY_NTH; 171static int scsi_debug_fake_rw = DEF_FAKE_RW; 172static int scsi_debug_guard = DEF_GUARD; 173static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED; 174static int scsi_debug_max_luns = DEF_MAX_LUNS; 175static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE; 176static int scsi_debug_no_lun_0 = DEF_NO_LUN_0; 177static int scsi_debug_no_uld = 0; 178static int scsi_debug_num_parts = DEF_NUM_PARTS; 179static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */ 180static int scsi_debug_opt_blks = DEF_OPT_BLKS; 181static int scsi_debug_opts = DEF_OPTS; 182static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP; 183static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */ 184static int scsi_debug_scsi_level = DEF_SCSI_LEVEL; 185static int scsi_debug_sector_size = DEF_SECTOR_SIZE; 186static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB; 187static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO; 188static unsigned int scsi_debug_lbpu = DEF_LBPU; 189static unsigned int scsi_debug_lbpws = DEF_LBPWS; 190static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10; 191static unsigned int scsi_debug_lbprz = DEF_LBPRZ; 192static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT; 193static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY; 194static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS; 195static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC; 196static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH; 197static bool scsi_debug_removable = DEF_REMOVABLE; 198 199static int scsi_debug_cmnd_count = 0; 200 201#define DEV_READONLY(TGT) (0) 202 203static unsigned int sdebug_store_sectors; 204static sector_t sdebug_capacity; /* in sectors */ 205 206/* old BIOS stuff, kernel may get rid of them but some mode sense pages 207 may still need them */ 208static int sdebug_heads; /* heads per disk */ 209static int sdebug_cylinders_per; /* cylinders per surface */ 210static int sdebug_sectors_per; /* sectors per cylinder */ 211 212#define SDEBUG_MAX_PARTS 4 213 214#define SDEBUG_SENSE_LEN 32 215 216#define SCSI_DEBUG_MAX_CMD_LEN 32 217 218static unsigned int scsi_debug_lbp(void) 219{ 220 return scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10; 221} 222 223struct sdebug_dev_info { 224 struct list_head dev_list; 225 unsigned char sense_buff[SDEBUG_SENSE_LEN]; /* weak nexus */ 226 unsigned int channel; 227 unsigned int target; 228 unsigned int lun; 229 struct sdebug_host_info *sdbg_host; 230 unsigned int wlun; 231 char reset; 232 char stopped; 233 char used; 234}; 235 236struct sdebug_host_info { 237 struct list_head host_list; 238 struct Scsi_Host *shost; 239 struct device dev; 240 struct list_head dev_info_list; 241}; 242 243#define to_sdebug_host(d) \ 244 container_of(d, struct sdebug_host_info, dev) 245 246static LIST_HEAD(sdebug_host_list); 247static DEFINE_SPINLOCK(sdebug_host_list_lock); 248 249typedef void (* done_funct_t) (struct scsi_cmnd *); 250 251struct sdebug_queued_cmd { 252 int in_use; 253 struct timer_list cmnd_timer; 254 done_funct_t done_funct; 255 struct scsi_cmnd * a_cmnd; 256 int scsi_result; 257}; 258static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE]; 259 260static unsigned char * fake_storep; /* ramdisk storage */ 261static unsigned char *dif_storep; /* protection info */ 262static void *map_storep; /* provisioning map */ 263 264static unsigned long map_size; 265static int num_aborts = 0; 266static int num_dev_resets = 0; 267static int num_bus_resets = 0; 268static int num_host_resets = 0; 269static int dix_writes; 270static int dix_reads; 271static int dif_errors; 272 273static DEFINE_SPINLOCK(queued_arr_lock); 274static DEFINE_RWLOCK(atomic_rw); 275 276static char sdebug_proc_name[] = "scsi_debug"; 277 278static struct bus_type pseudo_lld_bus; 279 280static inline sector_t dif_offset(sector_t sector) 281{ 282 return sector << 3; 283} 284 285static struct device_driver sdebug_driverfs_driver = { 286 .name = sdebug_proc_name, 287 .bus = &pseudo_lld_bus, 288}; 289 290static const int check_condition_result = 291 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 292 293static const int illegal_condition_result = 294 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION; 295 296static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, 297 0, 0, 0x2, 0x4b}; 298static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, 299 0, 0, 0x0, 0x0}; 300 301static int sdebug_add_adapter(void); 302static void sdebug_remove_adapter(void); 303 304static void sdebug_max_tgts_luns(void) 305{ 306 struct sdebug_host_info *sdbg_host; 307 struct Scsi_Host *hpnt; 308 309 spin_lock(&sdebug_host_list_lock); 310 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { 311 hpnt = sdbg_host->shost; 312 if ((hpnt->this_id >= 0) && 313 (scsi_debug_num_tgts > hpnt->this_id)) 314 hpnt->max_id = scsi_debug_num_tgts + 1; 315 else 316 hpnt->max_id = scsi_debug_num_tgts; 317 /* scsi_debug_max_luns; */ 318 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; 319 } 320 spin_unlock(&sdebug_host_list_lock); 321} 322 323static void mk_sense_buffer(struct sdebug_dev_info *devip, int key, 324 int asc, int asq) 325{ 326 unsigned char *sbuff; 327 328 sbuff = devip->sense_buff; 329 memset(sbuff, 0, SDEBUG_SENSE_LEN); 330 331 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq); 332 333 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 334 printk(KERN_INFO "scsi_debug: [sense_key,asc,ascq]: " 335 "[0x%x,0x%x,0x%x]\n", key, asc, asq); 336} 337 338static void get_data_transfer_info(unsigned char *cmd, 339 unsigned long long *lba, unsigned int *num, 340 u32 *ei_lba) 341{ 342 *ei_lba = 0; 343 344 switch (*cmd) { 345 case VARIABLE_LENGTH_CMD: 346 *lba = (u64)cmd[19] | (u64)cmd[18] << 8 | 347 (u64)cmd[17] << 16 | (u64)cmd[16] << 24 | 348 (u64)cmd[15] << 32 | (u64)cmd[14] << 40 | 349 (u64)cmd[13] << 48 | (u64)cmd[12] << 56; 350 351 *ei_lba = (u32)cmd[23] | (u32)cmd[22] << 8 | 352 (u32)cmd[21] << 16 | (u32)cmd[20] << 24; 353 354 *num = (u32)cmd[31] | (u32)cmd[30] << 8 | (u32)cmd[29] << 16 | 355 (u32)cmd[28] << 24; 356 break; 357 358 case WRITE_SAME_16: 359 case WRITE_16: 360 case READ_16: 361 *lba = (u64)cmd[9] | (u64)cmd[8] << 8 | 362 (u64)cmd[7] << 16 | (u64)cmd[6] << 24 | 363 (u64)cmd[5] << 32 | (u64)cmd[4] << 40 | 364 (u64)cmd[3] << 48 | (u64)cmd[2] << 56; 365 366 *num = (u32)cmd[13] | (u32)cmd[12] << 8 | (u32)cmd[11] << 16 | 367 (u32)cmd[10] << 24; 368 break; 369 case WRITE_12: 370 case READ_12: 371 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 | 372 (u32)cmd[2] << 24; 373 374 *num = (u32)cmd[9] | (u32)cmd[8] << 8 | (u32)cmd[7] << 16 | 375 (u32)cmd[6] << 24; 376 break; 377 case WRITE_SAME: 378 case WRITE_10: 379 case READ_10: 380 case XDWRITEREAD_10: 381 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 | 382 (u32)cmd[2] << 24; 383 384 *num = (u32)cmd[8] | (u32)cmd[7] << 8; 385 break; 386 case WRITE_6: 387 case READ_6: 388 *lba = (u32)cmd[3] | (u32)cmd[2] << 8 | 389 (u32)(cmd[1] & 0x1f) << 16; 390 *num = (0 == cmd[4]) ? 256 : cmd[4]; 391 break; 392 default: 393 break; 394 } 395} 396 397static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg) 398{ 399 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) { 400 printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd); 401 } 402 return -EINVAL; 403 /* return -ENOTTY; // correct return but upsets fdisk */ 404} 405 406static int check_readiness(struct scsi_cmnd * SCpnt, int reset_only, 407 struct sdebug_dev_info * devip) 408{ 409 if (devip->reset) { 410 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 411 printk(KERN_INFO "scsi_debug: Reporting Unit " 412 "attention: power on reset\n"); 413 devip->reset = 0; 414 mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0); 415 return check_condition_result; 416 } 417 if ((0 == reset_only) && devip->stopped) { 418 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 419 printk(KERN_INFO "scsi_debug: Reporting Not " 420 "ready: initializing command required\n"); 421 mk_sense_buffer(devip, NOT_READY, LOGICAL_UNIT_NOT_READY, 422 0x2); 423 return check_condition_result; 424 } 425 return 0; 426} 427 428/* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */ 429static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr, 430 int arr_len) 431{ 432 int act_len; 433 struct scsi_data_buffer *sdb = scsi_in(scp); 434 435 if (!sdb->length) 436 return 0; 437 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE)) 438 return (DID_ERROR << 16); 439 440 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents, 441 arr, arr_len); 442 if (sdb->resid) 443 sdb->resid -= act_len; 444 else 445 sdb->resid = scsi_bufflen(scp) - act_len; 446 447 return 0; 448} 449 450/* Returns number of bytes fetched into 'arr' or -1 if error. */ 451static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr, 452 int arr_len) 453{ 454 if (!scsi_bufflen(scp)) 455 return 0; 456 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE)) 457 return -1; 458 459 return scsi_sg_copy_to_buffer(scp, arr, arr_len); 460} 461 462 463static const char * inq_vendor_id = "Linux "; 464static const char * inq_product_id = "scsi_debug "; 465static const char * inq_product_rev = "0004"; 466 467static int inquiry_evpd_83(unsigned char * arr, int port_group_id, 468 int target_dev_id, int dev_id_num, 469 const char * dev_id_str, 470 int dev_id_str_len) 471{ 472 int num, port_a; 473 char b[32]; 474 475 port_a = target_dev_id + 1; 476 /* T10 vendor identifier field format (faked) */ 477 arr[0] = 0x2; /* ASCII */ 478 arr[1] = 0x1; 479 arr[2] = 0x0; 480 memcpy(&arr[4], inq_vendor_id, 8); 481 memcpy(&arr[12], inq_product_id, 16); 482 memcpy(&arr[28], dev_id_str, dev_id_str_len); 483 num = 8 + 16 + dev_id_str_len; 484 arr[3] = num; 485 num += 4; 486 if (dev_id_num >= 0) { 487 /* NAA-5, Logical unit identifier (binary) */ 488 arr[num++] = 0x1; /* binary (not necessarily sas) */ 489 arr[num++] = 0x3; /* PIV=0, lu, naa */ 490 arr[num++] = 0x0; 491 arr[num++] = 0x8; 492 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */ 493 arr[num++] = 0x33; 494 arr[num++] = 0x33; 495 arr[num++] = 0x30; 496 arr[num++] = (dev_id_num >> 24); 497 arr[num++] = (dev_id_num >> 16) & 0xff; 498 arr[num++] = (dev_id_num >> 8) & 0xff; 499 arr[num++] = dev_id_num & 0xff; 500 /* Target relative port number */ 501 arr[num++] = 0x61; /* proto=sas, binary */ 502 arr[num++] = 0x94; /* PIV=1, target port, rel port */ 503 arr[num++] = 0x0; /* reserved */ 504 arr[num++] = 0x4; /* length */ 505 arr[num++] = 0x0; /* reserved */ 506 arr[num++] = 0x0; /* reserved */ 507 arr[num++] = 0x0; 508 arr[num++] = 0x1; /* relative port A */ 509 } 510 /* NAA-5, Target port identifier */ 511 arr[num++] = 0x61; /* proto=sas, binary */ 512 arr[num++] = 0x93; /* piv=1, target port, naa */ 513 arr[num++] = 0x0; 514 arr[num++] = 0x8; 515 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */ 516 arr[num++] = 0x22; 517 arr[num++] = 0x22; 518 arr[num++] = 0x20; 519 arr[num++] = (port_a >> 24); 520 arr[num++] = (port_a >> 16) & 0xff; 521 arr[num++] = (port_a >> 8) & 0xff; 522 arr[num++] = port_a & 0xff; 523 /* NAA-5, Target port group identifier */ 524 arr[num++] = 0x61; /* proto=sas, binary */ 525 arr[num++] = 0x95; /* piv=1, target port group id */ 526 arr[num++] = 0x0; 527 arr[num++] = 0x4; 528 arr[num++] = 0; 529 arr[num++] = 0; 530 arr[num++] = (port_group_id >> 8) & 0xff; 531 arr[num++] = port_group_id & 0xff; 532 /* NAA-5, Target device identifier */ 533 arr[num++] = 0x61; /* proto=sas, binary */ 534 arr[num++] = 0xa3; /* piv=1, target device, naa */ 535 arr[num++] = 0x0; 536 arr[num++] = 0x8; 537 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */ 538 arr[num++] = 0x22; 539 arr[num++] = 0x22; 540 arr[num++] = 0x20; 541 arr[num++] = (target_dev_id >> 24); 542 arr[num++] = (target_dev_id >> 16) & 0xff; 543 arr[num++] = (target_dev_id >> 8) & 0xff; 544 arr[num++] = target_dev_id & 0xff; 545 /* SCSI name string: Target device identifier */ 546 arr[num++] = 0x63; /* proto=sas, UTF-8 */ 547 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */ 548 arr[num++] = 0x0; 549 arr[num++] = 24; 550 memcpy(arr + num, "naa.52222220", 12); 551 num += 12; 552 snprintf(b, sizeof(b), "%08X", target_dev_id); 553 memcpy(arr + num, b, 8); 554 num += 8; 555 memset(arr + num, 0, 4); 556 num += 4; 557 return num; 558} 559 560 561static unsigned char vpd84_data[] = { 562/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0, 563 0x22,0x22,0x22,0x0,0xbb,0x1, 564 0x22,0x22,0x22,0x0,0xbb,0x2, 565}; 566 567static int inquiry_evpd_84(unsigned char * arr) 568{ 569 memcpy(arr, vpd84_data, sizeof(vpd84_data)); 570 return sizeof(vpd84_data); 571} 572 573static int inquiry_evpd_85(unsigned char * arr) 574{ 575 int num = 0; 576 const char * na1 = "https://www.kernel.org/config"; 577 const char * na2 = "http://www.kernel.org/log"; 578 int plen, olen; 579 580 arr[num++] = 0x1; /* lu, storage config */ 581 arr[num++] = 0x0; /* reserved */ 582 arr[num++] = 0x0; 583 olen = strlen(na1); 584 plen = olen + 1; 585 if (plen % 4) 586 plen = ((plen / 4) + 1) * 4; 587 arr[num++] = plen; /* length, null termianted, padded */ 588 memcpy(arr + num, na1, olen); 589 memset(arr + num + olen, 0, plen - olen); 590 num += plen; 591 592 arr[num++] = 0x4; /* lu, logging */ 593 arr[num++] = 0x0; /* reserved */ 594 arr[num++] = 0x0; 595 olen = strlen(na2); 596 plen = olen + 1; 597 if (plen % 4) 598 plen = ((plen / 4) + 1) * 4; 599 arr[num++] = plen; /* length, null terminated, padded */ 600 memcpy(arr + num, na2, olen); 601 memset(arr + num + olen, 0, plen - olen); 602 num += plen; 603 604 return num; 605} 606 607/* SCSI ports VPD page */ 608static int inquiry_evpd_88(unsigned char * arr, int target_dev_id) 609{ 610 int num = 0; 611 int port_a, port_b; 612 613 port_a = target_dev_id + 1; 614 port_b = port_a + 1; 615 arr[num++] = 0x0; /* reserved */ 616 arr[num++] = 0x0; /* reserved */ 617 arr[num++] = 0x0; 618 arr[num++] = 0x1; /* relative port 1 (primary) */ 619 memset(arr + num, 0, 6); 620 num += 6; 621 arr[num++] = 0x0; 622 arr[num++] = 12; /* length tp descriptor */ 623 /* naa-5 target port identifier (A) */ 624 arr[num++] = 0x61; /* proto=sas, binary */ 625 arr[num++] = 0x93; /* PIV=1, target port, NAA */ 626 arr[num++] = 0x0; /* reserved */ 627 arr[num++] = 0x8; /* length */ 628 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */ 629 arr[num++] = 0x22; 630 arr[num++] = 0x22; 631 arr[num++] = 0x20; 632 arr[num++] = (port_a >> 24); 633 arr[num++] = (port_a >> 16) & 0xff; 634 arr[num++] = (port_a >> 8) & 0xff; 635 arr[num++] = port_a & 0xff; 636 637 arr[num++] = 0x0; /* reserved */ 638 arr[num++] = 0x0; /* reserved */ 639 arr[num++] = 0x0; 640 arr[num++] = 0x2; /* relative port 2 (secondary) */ 641 memset(arr + num, 0, 6); 642 num += 6; 643 arr[num++] = 0x0; 644 arr[num++] = 12; /* length tp descriptor */ 645 /* naa-5 target port identifier (B) */ 646 arr[num++] = 0x61; /* proto=sas, binary */ 647 arr[num++] = 0x93; /* PIV=1, target port, NAA */ 648 arr[num++] = 0x0; /* reserved */ 649 arr[num++] = 0x8; /* length */ 650 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */ 651 arr[num++] = 0x22; 652 arr[num++] = 0x22; 653 arr[num++] = 0x20; 654 arr[num++] = (port_b >> 24); 655 arr[num++] = (port_b >> 16) & 0xff; 656 arr[num++] = (port_b >> 8) & 0xff; 657 arr[num++] = port_b & 0xff; 658 659 return num; 660} 661 662 663static unsigned char vpd89_data[] = { 664/* from 4th byte */ 0,0,0,0, 665'l','i','n','u','x',' ',' ',' ', 666'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ', 667'1','2','3','4', 6680x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0, 6690xec,0,0,0, 6700x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0, 6710,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20, 6720x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33, 6730x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31, 6740x53,0x41, 6750x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 6760x20,0x20, 6770x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 6780x10,0x80, 6790,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0, 6800x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0, 6810x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0, 6820,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0, 6830x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40, 6840x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0, 6850,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0, 6860,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 6870,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 6880,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 6890x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42, 6900,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8, 6910xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe, 6920,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0, 6930,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 6940,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 6950,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 6960,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 6970,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 6980,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 6990,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 7000,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 7010,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 7020,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 7030,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 7040,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51, 705}; 706 707static int inquiry_evpd_89(unsigned char * arr) 708{ 709 memcpy(arr, vpd89_data, sizeof(vpd89_data)); 710 return sizeof(vpd89_data); 711} 712 713 714/* Block limits VPD page (SBC-3) */ 715static unsigned char vpdb0_data[] = { 716 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64, 717 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 718 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 719 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 720}; 721 722static int inquiry_evpd_b0(unsigned char * arr) 723{ 724 unsigned int gran; 725 726 memcpy(arr, vpdb0_data, sizeof(vpdb0_data)); 727 728 /* Optimal transfer length granularity */ 729 gran = 1 << scsi_debug_physblk_exp; 730 arr[2] = (gran >> 8) & 0xff; 731 arr[3] = gran & 0xff; 732 733 /* Maximum Transfer Length */ 734 if (sdebug_store_sectors > 0x400) { 735 arr[4] = (sdebug_store_sectors >> 24) & 0xff; 736 arr[5] = (sdebug_store_sectors >> 16) & 0xff; 737 arr[6] = (sdebug_store_sectors >> 8) & 0xff; 738 arr[7] = sdebug_store_sectors & 0xff; 739 } 740 741 /* Optimal Transfer Length */ 742 put_unaligned_be32(scsi_debug_opt_blks, &arr[8]); 743 744 if (scsi_debug_lbpu) { 745 /* Maximum Unmap LBA Count */ 746 put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]); 747 748 /* Maximum Unmap Block Descriptor Count */ 749 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]); 750 } 751 752 /* Unmap Granularity Alignment */ 753 if (scsi_debug_unmap_alignment) { 754 put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]); 755 arr[28] |= 0x80; /* UGAVALID */ 756 } 757 758 /* Optimal Unmap Granularity */ 759 put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]); 760 761 /* Maximum WRITE SAME Length */ 762 put_unaligned_be64(scsi_debug_write_same_length, &arr[32]); 763 764 return 0x3c; /* Mandatory page length for Logical Block Provisioning */ 765 766 return sizeof(vpdb0_data); 767} 768 769/* Block device characteristics VPD page (SBC-3) */ 770static int inquiry_evpd_b1(unsigned char *arr) 771{ 772 memset(arr, 0, 0x3c); 773 arr[0] = 0; 774 arr[1] = 1; /* non rotating medium (e.g. solid state) */ 775 arr[2] = 0; 776 arr[3] = 5; /* less than 1.8" */ 777 778 return 0x3c; 779} 780 781/* Logical block provisioning VPD page (SBC-3) */ 782static int inquiry_evpd_b2(unsigned char *arr) 783{ 784 memset(arr, 0, 0x4); 785 arr[0] = 0; /* threshold exponent */ 786 787 if (scsi_debug_lbpu) 788 arr[1] = 1 << 7; 789 790 if (scsi_debug_lbpws) 791 arr[1] |= 1 << 6; 792 793 if (scsi_debug_lbpws10) 794 arr[1] |= 1 << 5; 795 796 if (scsi_debug_lbprz) 797 arr[1] |= 1 << 2; 798 799 return 0x4; 800} 801 802#define SDEBUG_LONG_INQ_SZ 96 803#define SDEBUG_MAX_INQ_ARR_SZ 584 804 805static int resp_inquiry(struct scsi_cmnd * scp, int target, 806 struct sdebug_dev_info * devip) 807{ 808 unsigned char pq_pdt; 809 unsigned char * arr; 810 unsigned char *cmd = (unsigned char *)scp->cmnd; 811 int alloc_len, n, ret; 812 813 alloc_len = (cmd[3] << 8) + cmd[4]; 814 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC); 815 if (! arr) 816 return DID_REQUEUE << 16; 817 if (devip->wlun) 818 pq_pdt = 0x1e; /* present, wlun */ 819 else if (scsi_debug_no_lun_0 && (0 == devip->lun)) 820 pq_pdt = 0x7f; /* not present, no device type */ 821 else 822 pq_pdt = (scsi_debug_ptype & 0x1f); 823 arr[0] = pq_pdt; 824 if (0x2 & cmd[1]) { /* CMDDT bit set */ 825 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 826 0); 827 kfree(arr); 828 return check_condition_result; 829 } else if (0x1 & cmd[1]) { /* EVPD bit set */ 830 int lu_id_num, port_group_id, target_dev_id, len; 831 char lu_id_str[6]; 832 int host_no = devip->sdbg_host->shost->host_no; 833 834 port_group_id = (((host_no + 1) & 0x7f) << 8) + 835 (devip->channel & 0x7f); 836 if (0 == scsi_debug_vpd_use_hostno) 837 host_no = 0; 838 lu_id_num = devip->wlun ? -1 : (((host_no + 1) * 2000) + 839 (devip->target * 1000) + devip->lun); 840 target_dev_id = ((host_no + 1) * 2000) + 841 (devip->target * 1000) - 3; 842 len = scnprintf(lu_id_str, 6, "%d", lu_id_num); 843 if (0 == cmd[2]) { /* supported vital product data pages */ 844 arr[1] = cmd[2]; /*sanity */ 845 n = 4; 846 arr[n++] = 0x0; /* this page */ 847 arr[n++] = 0x80; /* unit serial number */ 848 arr[n++] = 0x83; /* device identification */ 849 arr[n++] = 0x84; /* software interface ident. */ 850 arr[n++] = 0x85; /* management network addresses */ 851 arr[n++] = 0x86; /* extended inquiry */ 852 arr[n++] = 0x87; /* mode page policy */ 853 arr[n++] = 0x88; /* SCSI ports */ 854 arr[n++] = 0x89; /* ATA information */ 855 arr[n++] = 0xb0; /* Block limits (SBC) */ 856 arr[n++] = 0xb1; /* Block characteristics (SBC) */ 857 if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */ 858 arr[n++] = 0xb2; 859 arr[3] = n - 4; /* number of supported VPD pages */ 860 } else if (0x80 == cmd[2]) { /* unit serial number */ 861 arr[1] = cmd[2]; /*sanity */ 862 arr[3] = len; 863 memcpy(&arr[4], lu_id_str, len); 864 } else if (0x83 == cmd[2]) { /* device identification */ 865 arr[1] = cmd[2]; /*sanity */ 866 arr[3] = inquiry_evpd_83(&arr[4], port_group_id, 867 target_dev_id, lu_id_num, 868 lu_id_str, len); 869 } else if (0x84 == cmd[2]) { /* Software interface ident. */ 870 arr[1] = cmd[2]; /*sanity */ 871 arr[3] = inquiry_evpd_84(&arr[4]); 872 } else if (0x85 == cmd[2]) { /* Management network addresses */ 873 arr[1] = cmd[2]; /*sanity */ 874 arr[3] = inquiry_evpd_85(&arr[4]); 875 } else if (0x86 == cmd[2]) { /* extended inquiry */ 876 arr[1] = cmd[2]; /*sanity */ 877 arr[3] = 0x3c; /* number of following entries */ 878 if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) 879 arr[4] = 0x4; /* SPT: GRD_CHK:1 */ 880 else if (scsi_debug_dif) 881 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */ 882 else 883 arr[4] = 0x0; /* no protection stuff */ 884 arr[5] = 0x7; /* head of q, ordered + simple q's */ 885 } else if (0x87 == cmd[2]) { /* mode page policy */ 886 arr[1] = cmd[2]; /*sanity */ 887 arr[3] = 0x8; /* number of following entries */ 888 arr[4] = 0x2; /* disconnect-reconnect mp */ 889 arr[6] = 0x80; /* mlus, shared */ 890 arr[8] = 0x18; /* protocol specific lu */ 891 arr[10] = 0x82; /* mlus, per initiator port */ 892 } else if (0x88 == cmd[2]) { /* SCSI Ports */ 893 arr[1] = cmd[2]; /*sanity */ 894 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id); 895 } else if (0x89 == cmd[2]) { /* ATA information */ 896 arr[1] = cmd[2]; /*sanity */ 897 n = inquiry_evpd_89(&arr[4]); 898 arr[2] = (n >> 8); 899 arr[3] = (n & 0xff); 900 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */ 901 arr[1] = cmd[2]; /*sanity */ 902 arr[3] = inquiry_evpd_b0(&arr[4]); 903 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */ 904 arr[1] = cmd[2]; /*sanity */ 905 arr[3] = inquiry_evpd_b1(&arr[4]); 906 } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */ 907 arr[1] = cmd[2]; /*sanity */ 908 arr[3] = inquiry_evpd_b2(&arr[4]); 909 } else { 910 /* Illegal request, invalid field in cdb */ 911 mk_sense_buffer(devip, ILLEGAL_REQUEST, 912 INVALID_FIELD_IN_CDB, 0); 913 kfree(arr); 914 return check_condition_result; 915 } 916 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len); 917 ret = fill_from_dev_buffer(scp, arr, 918 min(len, SDEBUG_MAX_INQ_ARR_SZ)); 919 kfree(arr); 920 return ret; 921 } 922 /* drops through here for a standard inquiry */ 923 arr[1] = scsi_debug_removable ? 0x80 : 0; /* Removable disk */ 924 arr[2] = scsi_debug_scsi_level; 925 arr[3] = 2; /* response_data_format==2 */ 926 arr[4] = SDEBUG_LONG_INQ_SZ - 5; 927 arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */ 928 if (0 == scsi_debug_vpd_use_hostno) 929 arr[5] = 0x10; /* claim: implicit TGPS */ 930 arr[6] = 0x10; /* claim: MultiP */ 931 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */ 932 arr[7] = 0xa; /* claim: LINKED + CMDQUE */ 933 memcpy(&arr[8], inq_vendor_id, 8); 934 memcpy(&arr[16], inq_product_id, 16); 935 memcpy(&arr[32], inq_product_rev, 4); 936 /* version descriptors (2 bytes each) follow */ 937 arr[58] = 0x0; arr[59] = 0x77; /* SAM-3 ANSI */ 938 arr[60] = 0x3; arr[61] = 0x14; /* SPC-3 ANSI */ 939 n = 62; 940 if (scsi_debug_ptype == 0) { 941 arr[n++] = 0x3; arr[n++] = 0x3d; /* SBC-2 ANSI */ 942 } else if (scsi_debug_ptype == 1) { 943 arr[n++] = 0x3; arr[n++] = 0x60; /* SSC-2 no version */ 944 } 945 arr[n++] = 0xc; arr[n++] = 0xf; /* SAS-1.1 rev 10 */ 946 ret = fill_from_dev_buffer(scp, arr, 947 min(alloc_len, SDEBUG_LONG_INQ_SZ)); 948 kfree(arr); 949 return ret; 950} 951 952static int resp_requests(struct scsi_cmnd * scp, 953 struct sdebug_dev_info * devip) 954{ 955 unsigned char * sbuff; 956 unsigned char *cmd = (unsigned char *)scp->cmnd; 957 unsigned char arr[SDEBUG_SENSE_LEN]; 958 int want_dsense; 959 int len = 18; 960 961 memset(arr, 0, sizeof(arr)); 962 if (devip->reset == 1) 963 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0); 964 want_dsense = !!(cmd[1] & 1) || scsi_debug_dsense; 965 sbuff = devip->sense_buff; 966 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) { 967 if (want_dsense) { 968 arr[0] = 0x72; 969 arr[1] = 0x0; /* NO_SENSE in sense_key */ 970 arr[2] = THRESHOLD_EXCEEDED; 971 arr[3] = 0xff; /* TEST set and MRIE==6 */ 972 } else { 973 arr[0] = 0x70; 974 arr[2] = 0x0; /* NO_SENSE in sense_key */ 975 arr[7] = 0xa; /* 18 byte sense buffer */ 976 arr[12] = THRESHOLD_EXCEEDED; 977 arr[13] = 0xff; /* TEST set and MRIE==6 */ 978 } 979 } else { 980 memcpy(arr, sbuff, SDEBUG_SENSE_LEN); 981 if ((cmd[1] & 1) && (! scsi_debug_dsense)) { 982 /* DESC bit set and sense_buff in fixed format */ 983 memset(arr, 0, sizeof(arr)); 984 arr[0] = 0x72; 985 arr[1] = sbuff[2]; /* sense key */ 986 arr[2] = sbuff[12]; /* asc */ 987 arr[3] = sbuff[13]; /* ascq */ 988 len = 8; 989 } 990 } 991 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0); 992 return fill_from_dev_buffer(scp, arr, len); 993} 994 995static int resp_start_stop(struct scsi_cmnd * scp, 996 struct sdebug_dev_info * devip) 997{ 998 unsigned char *cmd = (unsigned char *)scp->cmnd; 999 int power_cond, errsts, start; 1000 1001 if ((errsts = check_readiness(scp, 1, devip))) 1002 return errsts; 1003 power_cond = (cmd[4] & 0xf0) >> 4; 1004 if (power_cond) { 1005 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 1006 0); 1007 return check_condition_result; 1008 } 1009 start = cmd[4] & 1; 1010 if (start == devip->stopped) 1011 devip->stopped = !start; 1012 return 0; 1013} 1014 1015static sector_t get_sdebug_capacity(void) 1016{ 1017 if (scsi_debug_virtual_gb > 0) 1018 return (sector_t)scsi_debug_virtual_gb * 1019 (1073741824 / scsi_debug_sector_size); 1020 else 1021 return sdebug_store_sectors; 1022} 1023 1024#define SDEBUG_READCAP_ARR_SZ 8 1025static int resp_readcap(struct scsi_cmnd * scp, 1026 struct sdebug_dev_info * devip) 1027{ 1028 unsigned char arr[SDEBUG_READCAP_ARR_SZ]; 1029 unsigned int capac; 1030 int errsts; 1031 1032 if ((errsts = check_readiness(scp, 1, devip))) 1033 return errsts; 1034 /* following just in case virtual_gb changed */ 1035 sdebug_capacity = get_sdebug_capacity(); 1036 memset(arr, 0, SDEBUG_READCAP_ARR_SZ); 1037 if (sdebug_capacity < 0xffffffff) { 1038 capac = (unsigned int)sdebug_capacity - 1; 1039 arr[0] = (capac >> 24); 1040 arr[1] = (capac >> 16) & 0xff; 1041 arr[2] = (capac >> 8) & 0xff; 1042 arr[3] = capac & 0xff; 1043 } else { 1044 arr[0] = 0xff; 1045 arr[1] = 0xff; 1046 arr[2] = 0xff; 1047 arr[3] = 0xff; 1048 } 1049 arr[6] = (scsi_debug_sector_size >> 8) & 0xff; 1050 arr[7] = scsi_debug_sector_size & 0xff; 1051 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ); 1052} 1053 1054#define SDEBUG_READCAP16_ARR_SZ 32 1055static int resp_readcap16(struct scsi_cmnd * scp, 1056 struct sdebug_dev_info * devip) 1057{ 1058 unsigned char *cmd = (unsigned char *)scp->cmnd; 1059 unsigned char arr[SDEBUG_READCAP16_ARR_SZ]; 1060 unsigned long long capac; 1061 int errsts, k, alloc_len; 1062 1063 if ((errsts = check_readiness(scp, 1, devip))) 1064 return errsts; 1065 alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8) 1066 + cmd[13]); 1067 /* following just in case virtual_gb changed */ 1068 sdebug_capacity = get_sdebug_capacity(); 1069 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ); 1070 capac = sdebug_capacity - 1; 1071 for (k = 0; k < 8; ++k, capac >>= 8) 1072 arr[7 - k] = capac & 0xff; 1073 arr[8] = (scsi_debug_sector_size >> 24) & 0xff; 1074 arr[9] = (scsi_debug_sector_size >> 16) & 0xff; 1075 arr[10] = (scsi_debug_sector_size >> 8) & 0xff; 1076 arr[11] = scsi_debug_sector_size & 0xff; 1077 arr[13] = scsi_debug_physblk_exp & 0xf; 1078 arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f; 1079 1080 if (scsi_debug_lbp()) { 1081 arr[14] |= 0x80; /* LBPME */ 1082 if (scsi_debug_lbprz) 1083 arr[14] |= 0x40; /* LBPRZ */ 1084 } 1085 1086 arr[15] = scsi_debug_lowest_aligned & 0xff; 1087 1088 if (scsi_debug_dif) { 1089 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */ 1090 arr[12] |= 1; /* PROT_EN */ 1091 } 1092 1093 return fill_from_dev_buffer(scp, arr, 1094 min(alloc_len, SDEBUG_READCAP16_ARR_SZ)); 1095} 1096 1097#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412 1098 1099static int resp_report_tgtpgs(struct scsi_cmnd * scp, 1100 struct sdebug_dev_info * devip) 1101{ 1102 unsigned char *cmd = (unsigned char *)scp->cmnd; 1103 unsigned char * arr; 1104 int host_no = devip->sdbg_host->shost->host_no; 1105 int n, ret, alen, rlen; 1106 int port_group_a, port_group_b, port_a, port_b; 1107 1108 alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8) 1109 + cmd[9]); 1110 1111 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC); 1112 if (! arr) 1113 return DID_REQUEUE << 16; 1114 /* 1115 * EVPD page 0x88 states we have two ports, one 1116 * real and a fake port with no device connected. 1117 * So we create two port groups with one port each 1118 * and set the group with port B to unavailable. 1119 */ 1120 port_a = 0x1; /* relative port A */ 1121 port_b = 0x2; /* relative port B */ 1122 port_group_a = (((host_no + 1) & 0x7f) << 8) + 1123 (devip->channel & 0x7f); 1124 port_group_b = (((host_no + 1) & 0x7f) << 8) + 1125 (devip->channel & 0x7f) + 0x80; 1126 1127 /* 1128 * The asymmetric access state is cycled according to the host_id. 1129 */ 1130 n = 4; 1131 if (0 == scsi_debug_vpd_use_hostno) { 1132 arr[n++] = host_no % 3; /* Asymm access state */ 1133 arr[n++] = 0x0F; /* claim: all states are supported */ 1134 } else { 1135 arr[n++] = 0x0; /* Active/Optimized path */ 1136 arr[n++] = 0x01; /* claim: only support active/optimized paths */ 1137 } 1138 arr[n++] = (port_group_a >> 8) & 0xff; 1139 arr[n++] = port_group_a & 0xff; 1140 arr[n++] = 0; /* Reserved */ 1141 arr[n++] = 0; /* Status code */ 1142 arr[n++] = 0; /* Vendor unique */ 1143 arr[n++] = 0x1; /* One port per group */ 1144 arr[n++] = 0; /* Reserved */ 1145 arr[n++] = 0; /* Reserved */ 1146 arr[n++] = (port_a >> 8) & 0xff; 1147 arr[n++] = port_a & 0xff; 1148 arr[n++] = 3; /* Port unavailable */ 1149 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */ 1150 arr[n++] = (port_group_b >> 8) & 0xff; 1151 arr[n++] = port_group_b & 0xff; 1152 arr[n++] = 0; /* Reserved */ 1153 arr[n++] = 0; /* Status code */ 1154 arr[n++] = 0; /* Vendor unique */ 1155 arr[n++] = 0x1; /* One port per group */ 1156 arr[n++] = 0; /* Reserved */ 1157 arr[n++] = 0; /* Reserved */ 1158 arr[n++] = (port_b >> 8) & 0xff; 1159 arr[n++] = port_b & 0xff; 1160 1161 rlen = n - 4; 1162 arr[0] = (rlen >> 24) & 0xff; 1163 arr[1] = (rlen >> 16) & 0xff; 1164 arr[2] = (rlen >> 8) & 0xff; 1165 arr[3] = rlen & 0xff; 1166 1167 /* 1168 * Return the smallest value of either 1169 * - The allocated length 1170 * - The constructed command length 1171 * - The maximum array size 1172 */ 1173 rlen = min(alen,n); 1174 ret = fill_from_dev_buffer(scp, arr, 1175 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ)); 1176 kfree(arr); 1177 return ret; 1178} 1179 1180/* <<Following mode page info copied from ST318451LW>> */ 1181 1182static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target) 1183{ /* Read-Write Error Recovery page for mode_sense */ 1184 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0, 1185 5, 0, 0xff, 0xff}; 1186 1187 memcpy(p, err_recov_pg, sizeof(err_recov_pg)); 1188 if (1 == pcontrol) 1189 memset(p + 2, 0, sizeof(err_recov_pg) - 2); 1190 return sizeof(err_recov_pg); 1191} 1192 1193static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target) 1194{ /* Disconnect-Reconnect page for mode_sense */ 1195 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0, 1196 0, 0, 0, 0, 0, 0, 0, 0}; 1197 1198 memcpy(p, disconnect_pg, sizeof(disconnect_pg)); 1199 if (1 == pcontrol) 1200 memset(p + 2, 0, sizeof(disconnect_pg) - 2); 1201 return sizeof(disconnect_pg); 1202} 1203 1204static int resp_format_pg(unsigned char * p, int pcontrol, int target) 1205{ /* Format device page for mode_sense */ 1206 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0, 1207 0, 0, 0, 0, 0, 0, 0, 0, 1208 0, 0, 0, 0, 0x40, 0, 0, 0}; 1209 1210 memcpy(p, format_pg, sizeof(format_pg)); 1211 p[10] = (sdebug_sectors_per >> 8) & 0xff; 1212 p[11] = sdebug_sectors_per & 0xff; 1213 p[12] = (scsi_debug_sector_size >> 8) & 0xff; 1214 p[13] = scsi_debug_sector_size & 0xff; 1215 if (scsi_debug_removable) 1216 p[20] |= 0x20; /* should agree with INQUIRY */ 1217 if (1 == pcontrol) 1218 memset(p + 2, 0, sizeof(format_pg) - 2); 1219 return sizeof(format_pg); 1220} 1221 1222static int resp_caching_pg(unsigned char * p, int pcontrol, int target) 1223{ /* Caching page for mode_sense */ 1224 unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, 1225 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0}; 1226 1227 memcpy(p, caching_pg, sizeof(caching_pg)); 1228 if (1 == pcontrol) 1229 memset(p + 2, 0, sizeof(caching_pg) - 2); 1230 return sizeof(caching_pg); 1231} 1232 1233static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target) 1234{ /* Control mode page for mode_sense */ 1235 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0, 1236 0, 0, 0, 0}; 1237 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, 1238 0, 0, 0x2, 0x4b}; 1239 1240 if (scsi_debug_dsense) 1241 ctrl_m_pg[2] |= 0x4; 1242 else 1243 ctrl_m_pg[2] &= ~0x4; 1244 1245 if (scsi_debug_ato) 1246 ctrl_m_pg[5] |= 0x80; /* ATO=1 */ 1247 1248 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg)); 1249 if (1 == pcontrol) 1250 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg)); 1251 else if (2 == pcontrol) 1252 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg)); 1253 return sizeof(ctrl_m_pg); 1254} 1255 1256 1257static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target) 1258{ /* Informational Exceptions control mode page for mode_sense */ 1259 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0, 1260 0, 0, 0x0, 0x0}; 1261 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, 1262 0, 0, 0x0, 0x0}; 1263 1264 memcpy(p, iec_m_pg, sizeof(iec_m_pg)); 1265 if (1 == pcontrol) 1266 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg)); 1267 else if (2 == pcontrol) 1268 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg)); 1269 return sizeof(iec_m_pg); 1270} 1271 1272static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target) 1273{ /* SAS SSP mode page - short format for mode_sense */ 1274 unsigned char sas_sf_m_pg[] = {0x19, 0x6, 1275 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0}; 1276 1277 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg)); 1278 if (1 == pcontrol) 1279 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2); 1280 return sizeof(sas_sf_m_pg); 1281} 1282 1283 1284static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target, 1285 int target_dev_id) 1286{ /* SAS phy control and discover mode page for mode_sense */ 1287 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2, 1288 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0, 1289 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0, 1290 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1, 1291 0x2, 0, 0, 0, 0, 0, 0, 0, 1292 0x88, 0x99, 0, 0, 0, 0, 0, 0, 1293 0, 0, 0, 0, 0, 0, 0, 0, 1294 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0, 1295 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0, 1296 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1, 1297 0x3, 0, 0, 0, 0, 0, 0, 0, 1298 0x88, 0x99, 0, 0, 0, 0, 0, 0, 1299 0, 0, 0, 0, 0, 0, 0, 0, 1300 }; 1301 int port_a, port_b; 1302 1303 port_a = target_dev_id + 1; 1304 port_b = port_a + 1; 1305 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg)); 1306 p[20] = (port_a >> 24); 1307 p[21] = (port_a >> 16) & 0xff; 1308 p[22] = (port_a >> 8) & 0xff; 1309 p[23] = port_a & 0xff; 1310 p[48 + 20] = (port_b >> 24); 1311 p[48 + 21] = (port_b >> 16) & 0xff; 1312 p[48 + 22] = (port_b >> 8) & 0xff; 1313 p[48 + 23] = port_b & 0xff; 1314 if (1 == pcontrol) 1315 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4); 1316 return sizeof(sas_pcd_m_pg); 1317} 1318 1319static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol) 1320{ /* SAS SSP shared protocol specific port mode subpage */ 1321 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0, 1322 0, 0, 0, 0, 0, 0, 0, 0, 1323 }; 1324 1325 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg)); 1326 if (1 == pcontrol) 1327 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4); 1328 return sizeof(sas_sha_m_pg); 1329} 1330 1331#define SDEBUG_MAX_MSENSE_SZ 256 1332 1333static int resp_mode_sense(struct scsi_cmnd * scp, int target, 1334 struct sdebug_dev_info * devip) 1335{ 1336 unsigned char dbd, llbaa; 1337 int pcontrol, pcode, subpcode, bd_len; 1338 unsigned char dev_spec; 1339 int k, alloc_len, msense_6, offset, len, errsts, target_dev_id; 1340 unsigned char * ap; 1341 unsigned char arr[SDEBUG_MAX_MSENSE_SZ]; 1342 unsigned char *cmd = (unsigned char *)scp->cmnd; 1343 1344 if ((errsts = check_readiness(scp, 1, devip))) 1345 return errsts; 1346 dbd = !!(cmd[1] & 0x8); 1347 pcontrol = (cmd[2] & 0xc0) >> 6; 1348 pcode = cmd[2] & 0x3f; 1349 subpcode = cmd[3]; 1350 msense_6 = (MODE_SENSE == cmd[0]); 1351 llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10); 1352 if ((0 == scsi_debug_ptype) && (0 == dbd)) 1353 bd_len = llbaa ? 16 : 8; 1354 else 1355 bd_len = 0; 1356 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]); 1357 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ); 1358 if (0x3 == pcontrol) { /* Saving values not supported */ 1359 mk_sense_buffer(devip, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 1360 0); 1361 return check_condition_result; 1362 } 1363 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) + 1364 (devip->target * 1000) - 3; 1365 /* set DPOFUA bit for disks */ 1366 if (0 == scsi_debug_ptype) 1367 dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10; 1368 else 1369 dev_spec = 0x0; 1370 if (msense_6) { 1371 arr[2] = dev_spec; 1372 arr[3] = bd_len; 1373 offset = 4; 1374 } else { 1375 arr[3] = dev_spec; 1376 if (16 == bd_len) 1377 arr[4] = 0x1; /* set LONGLBA bit */ 1378 arr[7] = bd_len; /* assume 255 or less */ 1379 offset = 8; 1380 } 1381 ap = arr + offset; 1382 if ((bd_len > 0) && (!sdebug_capacity)) 1383 sdebug_capacity = get_sdebug_capacity(); 1384 1385 if (8 == bd_len) { 1386 if (sdebug_capacity > 0xfffffffe) { 1387 ap[0] = 0xff; 1388 ap[1] = 0xff; 1389 ap[2] = 0xff; 1390 ap[3] = 0xff; 1391 } else { 1392 ap[0] = (sdebug_capacity >> 24) & 0xff; 1393 ap[1] = (sdebug_capacity >> 16) & 0xff; 1394 ap[2] = (sdebug_capacity >> 8) & 0xff; 1395 ap[3] = sdebug_capacity & 0xff; 1396 } 1397 ap[6] = (scsi_debug_sector_size >> 8) & 0xff; 1398 ap[7] = scsi_debug_sector_size & 0xff; 1399 offset += bd_len; 1400 ap = arr + offset; 1401 } else if (16 == bd_len) { 1402 unsigned long long capac = sdebug_capacity; 1403 1404 for (k = 0; k < 8; ++k, capac >>= 8) 1405 ap[7 - k] = capac & 0xff; 1406 ap[12] = (scsi_debug_sector_size >> 24) & 0xff; 1407 ap[13] = (scsi_debug_sector_size >> 16) & 0xff; 1408 ap[14] = (scsi_debug_sector_size >> 8) & 0xff; 1409 ap[15] = scsi_debug_sector_size & 0xff; 1410 offset += bd_len; 1411 ap = arr + offset; 1412 } 1413 1414 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) { 1415 /* TODO: Control Extension page */ 1416 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 1417 0); 1418 return check_condition_result; 1419 } 1420 switch (pcode) { 1421 case 0x1: /* Read-Write error recovery page, direct access */ 1422 len = resp_err_recov_pg(ap, pcontrol, target); 1423 offset += len; 1424 break; 1425 case 0x2: /* Disconnect-Reconnect page, all devices */ 1426 len = resp_disconnect_pg(ap, pcontrol, target); 1427 offset += len; 1428 break; 1429 case 0x3: /* Format device page, direct access */ 1430 len = resp_format_pg(ap, pcontrol, target); 1431 offset += len; 1432 break; 1433 case 0x8: /* Caching page, direct access */ 1434 len = resp_caching_pg(ap, pcontrol, target); 1435 offset += len; 1436 break; 1437 case 0xa: /* Control Mode page, all devices */ 1438 len = resp_ctrl_m_pg(ap, pcontrol, target); 1439 offset += len; 1440 break; 1441 case 0x19: /* if spc==1 then sas phy, control+discover */ 1442 if ((subpcode > 0x2) && (subpcode < 0xff)) { 1443 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1444 INVALID_FIELD_IN_CDB, 0); 1445 return check_condition_result; 1446 } 1447 len = 0; 1448 if ((0x0 == subpcode) || (0xff == subpcode)) 1449 len += resp_sas_sf_m_pg(ap + len, pcontrol, target); 1450 if ((0x1 == subpcode) || (0xff == subpcode)) 1451 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target, 1452 target_dev_id); 1453 if ((0x2 == subpcode) || (0xff == subpcode)) 1454 len += resp_sas_sha_m_spg(ap + len, pcontrol); 1455 offset += len; 1456 break; 1457 case 0x1c: /* Informational Exceptions Mode page, all devices */ 1458 len = resp_iec_m_pg(ap, pcontrol, target); 1459 offset += len; 1460 break; 1461 case 0x3f: /* Read all Mode pages */ 1462 if ((0 == subpcode) || (0xff == subpcode)) { 1463 len = resp_err_recov_pg(ap, pcontrol, target); 1464 len += resp_disconnect_pg(ap + len, pcontrol, target); 1465 len += resp_format_pg(ap + len, pcontrol, target); 1466 len += resp_caching_pg(ap + len, pcontrol, target); 1467 len += resp_ctrl_m_pg(ap + len, pcontrol, target); 1468 len += resp_sas_sf_m_pg(ap + len, pcontrol, target); 1469 if (0xff == subpcode) { 1470 len += resp_sas_pcd_m_spg(ap + len, pcontrol, 1471 target, target_dev_id); 1472 len += resp_sas_sha_m_spg(ap + len, pcontrol); 1473 } 1474 len += resp_iec_m_pg(ap + len, pcontrol, target); 1475 } else { 1476 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1477 INVALID_FIELD_IN_CDB, 0); 1478 return check_condition_result; 1479 } 1480 offset += len; 1481 break; 1482 default: 1483 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 1484 0); 1485 return check_condition_result; 1486 } 1487 if (msense_6) 1488 arr[0] = offset - 1; 1489 else { 1490 arr[0] = ((offset - 2) >> 8) & 0xff; 1491 arr[1] = (offset - 2) & 0xff; 1492 } 1493 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset)); 1494} 1495 1496#define SDEBUG_MAX_MSELECT_SZ 512 1497 1498static int resp_mode_select(struct scsi_cmnd * scp, int mselect6, 1499 struct sdebug_dev_info * devip) 1500{ 1501 int pf, sp, ps, md_len, bd_len, off, spf, pg_len; 1502 int param_len, res, errsts, mpage; 1503 unsigned char arr[SDEBUG_MAX_MSELECT_SZ]; 1504 unsigned char *cmd = (unsigned char *)scp->cmnd; 1505 1506 if ((errsts = check_readiness(scp, 1, devip))) 1507 return errsts; 1508 memset(arr, 0, sizeof(arr)); 1509 pf = cmd[1] & 0x10; 1510 sp = cmd[1] & 0x1; 1511 param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]); 1512 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) { 1513 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1514 INVALID_FIELD_IN_CDB, 0); 1515 return check_condition_result; 1516 } 1517 res = fetch_to_dev_buffer(scp, arr, param_len); 1518 if (-1 == res) 1519 return (DID_ERROR << 16); 1520 else if ((res < param_len) && 1521 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) 1522 printk(KERN_INFO "scsi_debug: mode_select: cdb indicated=%d, " 1523 " IO sent=%d bytes\n", param_len, res); 1524 md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2); 1525 bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]); 1526 if (md_len > 2) { 1527 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1528 INVALID_FIELD_IN_PARAM_LIST, 0); 1529 return check_condition_result; 1530 } 1531 off = bd_len + (mselect6 ? 4 : 8); 1532 mpage = arr[off] & 0x3f; 1533 ps = !!(arr[off] & 0x80); 1534 if (ps) { 1535 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1536 INVALID_FIELD_IN_PARAM_LIST, 0); 1537 return check_condition_result; 1538 } 1539 spf = !!(arr[off] & 0x40); 1540 pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) : 1541 (arr[off + 1] + 2); 1542 if ((pg_len + off) > param_len) { 1543 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1544 PARAMETER_LIST_LENGTH_ERR, 0); 1545 return check_condition_result; 1546 } 1547 switch (mpage) { 1548 case 0xa: /* Control Mode page */ 1549 if (ctrl_m_pg[1] == arr[off + 1]) { 1550 memcpy(ctrl_m_pg + 2, arr + off + 2, 1551 sizeof(ctrl_m_pg) - 2); 1552 scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4); 1553 return 0; 1554 } 1555 break; 1556 case 0x1c: /* Informational Exceptions Mode page */ 1557 if (iec_m_pg[1] == arr[off + 1]) { 1558 memcpy(iec_m_pg + 2, arr + off + 2, 1559 sizeof(iec_m_pg) - 2); 1560 return 0; 1561 } 1562 break; 1563 default: 1564 break; 1565 } 1566 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1567 INVALID_FIELD_IN_PARAM_LIST, 0); 1568 return check_condition_result; 1569} 1570 1571static int resp_temp_l_pg(unsigned char * arr) 1572{ 1573 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38, 1574 0x0, 0x1, 0x3, 0x2, 0x0, 65, 1575 }; 1576 1577 memcpy(arr, temp_l_pg, sizeof(temp_l_pg)); 1578 return sizeof(temp_l_pg); 1579} 1580 1581static int resp_ie_l_pg(unsigned char * arr) 1582{ 1583 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38, 1584 }; 1585 1586 memcpy(arr, ie_l_pg, sizeof(ie_l_pg)); 1587 if (iec_m_pg[2] & 0x4) { /* TEST bit set */ 1588 arr[4] = THRESHOLD_EXCEEDED; 1589 arr[5] = 0xff; 1590 } 1591 return sizeof(ie_l_pg); 1592} 1593 1594#define SDEBUG_MAX_LSENSE_SZ 512 1595 1596static int resp_log_sense(struct scsi_cmnd * scp, 1597 struct sdebug_dev_info * devip) 1598{ 1599 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, errsts, len, n; 1600 unsigned char arr[SDEBUG_MAX_LSENSE_SZ]; 1601 unsigned char *cmd = (unsigned char *)scp->cmnd; 1602 1603 if ((errsts = check_readiness(scp, 1, devip))) 1604 return errsts; 1605 memset(arr, 0, sizeof(arr)); 1606 ppc = cmd[1] & 0x2; 1607 sp = cmd[1] & 0x1; 1608 if (ppc || sp) { 1609 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1610 INVALID_FIELD_IN_CDB, 0); 1611 return check_condition_result; 1612 } 1613 pcontrol = (cmd[2] & 0xc0) >> 6; 1614 pcode = cmd[2] & 0x3f; 1615 subpcode = cmd[3] & 0xff; 1616 alloc_len = (cmd[7] << 8) + cmd[8]; 1617 arr[0] = pcode; 1618 if (0 == subpcode) { 1619 switch (pcode) { 1620 case 0x0: /* Supported log pages log page */ 1621 n = 4; 1622 arr[n++] = 0x0; /* this page */ 1623 arr[n++] = 0xd; /* Temperature */ 1624 arr[n++] = 0x2f; /* Informational exceptions */ 1625 arr[3] = n - 4; 1626 break; 1627 case 0xd: /* Temperature log page */ 1628 arr[3] = resp_temp_l_pg(arr + 4); 1629 break; 1630 case 0x2f: /* Informational exceptions log page */ 1631 arr[3] = resp_ie_l_pg(arr + 4); 1632 break; 1633 default: 1634 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1635 INVALID_FIELD_IN_CDB, 0); 1636 return check_condition_result; 1637 } 1638 } else if (0xff == subpcode) { 1639 arr[0] |= 0x40; 1640 arr[1] = subpcode; 1641 switch (pcode) { 1642 case 0x0: /* Supported log pages and subpages log page */ 1643 n = 4; 1644 arr[n++] = 0x0; 1645 arr[n++] = 0x0; /* 0,0 page */ 1646 arr[n++] = 0x0; 1647 arr[n++] = 0xff; /* this page */ 1648 arr[n++] = 0xd; 1649 arr[n++] = 0x0; /* Temperature */ 1650 arr[n++] = 0x2f; 1651 arr[n++] = 0x0; /* Informational exceptions */ 1652 arr[3] = n - 4; 1653 break; 1654 case 0xd: /* Temperature subpages */ 1655 n = 4; 1656 arr[n++] = 0xd; 1657 arr[n++] = 0x0; /* Temperature */ 1658 arr[3] = n - 4; 1659 break; 1660 case 0x2f: /* Informational exceptions subpages */ 1661 n = 4; 1662 arr[n++] = 0x2f; 1663 arr[n++] = 0x0; /* Informational exceptions */ 1664 arr[3] = n - 4; 1665 break; 1666 default: 1667 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1668 INVALID_FIELD_IN_CDB, 0); 1669 return check_condition_result; 1670 } 1671 } else { 1672 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1673 INVALID_FIELD_IN_CDB, 0); 1674 return check_condition_result; 1675 } 1676 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len); 1677 return fill_from_dev_buffer(scp, arr, 1678 min(len, SDEBUG_MAX_INQ_ARR_SZ)); 1679} 1680 1681static int check_device_access_params(struct sdebug_dev_info *devi, 1682 unsigned long long lba, unsigned int num) 1683{ 1684 if (lba + num > sdebug_capacity) { 1685 mk_sense_buffer(devi, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, 0); 1686 return check_condition_result; 1687 } 1688 /* transfer length excessive (tie in to block limits VPD page) */ 1689 if (num > sdebug_store_sectors) { 1690 mk_sense_buffer(devi, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 1691 return check_condition_result; 1692 } 1693 return 0; 1694} 1695 1696static int do_device_access(struct scsi_cmnd *scmd, 1697 struct sdebug_dev_info *devi, 1698 unsigned long long lba, unsigned int num, int write) 1699{ 1700 int ret; 1701 unsigned long long block, rest = 0; 1702 int (*func)(struct scsi_cmnd *, unsigned char *, int); 1703 1704 func = write ? fetch_to_dev_buffer : fill_from_dev_buffer; 1705 1706 block = do_div(lba, sdebug_store_sectors); 1707 if (block + num > sdebug_store_sectors) 1708 rest = block + num - sdebug_store_sectors; 1709 1710 ret = func(scmd, fake_storep + (block * scsi_debug_sector_size), 1711 (num - rest) * scsi_debug_sector_size); 1712 if (!ret && rest) 1713 ret = func(scmd, fake_storep, rest * scsi_debug_sector_size); 1714 1715 return ret; 1716} 1717 1718static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec, 1719 unsigned int sectors, u32 ei_lba) 1720{ 1721 unsigned int i, resid; 1722 struct scatterlist *psgl; 1723 struct sd_dif_tuple *sdt; 1724 sector_t sector; 1725 sector_t tmp_sec = start_sec; 1726 void *paddr; 1727 1728 start_sec = do_div(tmp_sec, sdebug_store_sectors); 1729 1730 sdt = (struct sd_dif_tuple *)(dif_storep + dif_offset(start_sec)); 1731 1732 for (i = 0 ; i < sectors ; i++) { 1733 u16 csum; 1734 1735 if (sdt[i].app_tag == 0xffff) 1736 continue; 1737 1738 sector = start_sec + i; 1739 1740 switch (scsi_debug_guard) { 1741 case 1: 1742 csum = ip_compute_csum(fake_storep + 1743 sector * scsi_debug_sector_size, 1744 scsi_debug_sector_size); 1745 break; 1746 case 0: 1747 csum = crc_t10dif(fake_storep + 1748 sector * scsi_debug_sector_size, 1749 scsi_debug_sector_size); 1750 csum = cpu_to_be16(csum); 1751 break; 1752 default: 1753 BUG(); 1754 } 1755 1756 if (sdt[i].guard_tag != csum) { 1757 printk(KERN_ERR "%s: GUARD check failed on sector %lu" \ 1758 " rcvd 0x%04x, data 0x%04x\n", __func__, 1759 (unsigned long)sector, 1760 be16_to_cpu(sdt[i].guard_tag), 1761 be16_to_cpu(csum)); 1762 dif_errors++; 1763 return 0x01; 1764 } 1765 1766 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION && 1767 be32_to_cpu(sdt[i].ref_tag) != (sector & 0xffffffff)) { 1768 printk(KERN_ERR "%s: REF check failed on sector %lu\n", 1769 __func__, (unsigned long)sector); 1770 dif_errors++; 1771 return 0x03; 1772 } 1773 1774 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && 1775 be32_to_cpu(sdt[i].ref_tag) != ei_lba) { 1776 printk(KERN_ERR "%s: REF check failed on sector %lu\n", 1777 __func__, (unsigned long)sector); 1778 dif_errors++; 1779 return 0x03; 1780 } 1781 1782 ei_lba++; 1783 } 1784 1785 resid = sectors * 8; /* Bytes of protection data to copy into sgl */ 1786 sector = start_sec; 1787 1788 scsi_for_each_prot_sg(SCpnt, psgl, scsi_prot_sg_count(SCpnt), i) { 1789 int len = min(psgl->length, resid); 1790 1791 paddr = kmap_atomic(sg_page(psgl)) + psgl->offset; 1792 memcpy(paddr, dif_storep + dif_offset(sector), len); 1793 1794 sector += len >> 3; 1795 if (sector >= sdebug_store_sectors) { 1796 /* Force wrap */ 1797 tmp_sec = sector; 1798 sector = do_div(tmp_sec, sdebug_store_sectors); 1799 } 1800 resid -= len; 1801 kunmap_atomic(paddr); 1802 } 1803 1804 dix_reads++; 1805 1806 return 0; 1807} 1808 1809static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba, 1810 unsigned int num, struct sdebug_dev_info *devip, 1811 u32 ei_lba) 1812{ 1813 unsigned long iflags; 1814 int ret; 1815 1816 ret = check_device_access_params(devip, lba, num); 1817 if (ret) 1818 return ret; 1819 1820 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) && 1821 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) && 1822 ((lba + num) > OPT_MEDIUM_ERR_ADDR)) { 1823 /* claim unrecoverable read error */ 1824 mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0); 1825 /* set info field and valid bit for fixed descriptor */ 1826 if (0x70 == (devip->sense_buff[0] & 0x7f)) { 1827 devip->sense_buff[0] |= 0x80; /* Valid bit */ 1828 ret = (lba < OPT_MEDIUM_ERR_ADDR) 1829 ? OPT_MEDIUM_ERR_ADDR : (int)lba; 1830 devip->sense_buff[3] = (ret >> 24) & 0xff; 1831 devip->sense_buff[4] = (ret >> 16) & 0xff; 1832 devip->sense_buff[5] = (ret >> 8) & 0xff; 1833 devip->sense_buff[6] = ret & 0xff; 1834 } 1835 scsi_set_resid(SCpnt, scsi_bufflen(SCpnt)); 1836 return check_condition_result; 1837 } 1838 1839 /* DIX + T10 DIF */ 1840 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) { 1841 int prot_ret = prot_verify_read(SCpnt, lba, num, ei_lba); 1842 1843 if (prot_ret) { 1844 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, prot_ret); 1845 return illegal_condition_result; 1846 } 1847 } 1848 1849 read_lock_irqsave(&atomic_rw, iflags); 1850 ret = do_device_access(SCpnt, devip, lba, num, 0); 1851 read_unlock_irqrestore(&atomic_rw, iflags); 1852 return ret; 1853} 1854 1855void dump_sector(unsigned char *buf, int len) 1856{ 1857 int i, j; 1858 1859 printk(KERN_ERR ">>> Sector Dump <<<\n"); 1860 1861 for (i = 0 ; i < len ; i += 16) { 1862 printk(KERN_ERR "%04d: ", i); 1863 1864 for (j = 0 ; j < 16 ; j++) { 1865 unsigned char c = buf[i+j]; 1866 if (c >= 0x20 && c < 0x7e) 1867 printk(" %c ", buf[i+j]); 1868 else 1869 printk("%02x ", buf[i+j]); 1870 } 1871 1872 printk("\n"); 1873 } 1874} 1875 1876static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec, 1877 unsigned int sectors, u32 ei_lba) 1878{ 1879 int i, j, ret; 1880 struct sd_dif_tuple *sdt; 1881 struct scatterlist *dsgl = scsi_sglist(SCpnt); 1882 struct scatterlist *psgl = scsi_prot_sglist(SCpnt); 1883 void *daddr, *paddr; 1884 sector_t tmp_sec = start_sec; 1885 sector_t sector; 1886 int ppage_offset; 1887 unsigned short csum; 1888 1889 sector = do_div(tmp_sec, sdebug_store_sectors); 1890 1891 BUG_ON(scsi_sg_count(SCpnt) == 0); 1892 BUG_ON(scsi_prot_sg_count(SCpnt) == 0); 1893 1894 paddr = kmap_atomic(sg_page(psgl)) + psgl->offset; 1895 ppage_offset = 0; 1896 1897 /* For each data page */ 1898 scsi_for_each_sg(SCpnt, dsgl, scsi_sg_count(SCpnt), i) { 1899 daddr = kmap_atomic(sg_page(dsgl)) + dsgl->offset; 1900 1901 /* For each sector-sized chunk in data page */ 1902 for (j = 0 ; j < dsgl->length ; j += scsi_debug_sector_size) { 1903 1904 /* If we're at the end of the current 1905 * protection page advance to the next one 1906 */ 1907 if (ppage_offset >= psgl->length) { 1908 kunmap_atomic(paddr); 1909 psgl = sg_next(psgl); 1910 BUG_ON(psgl == NULL); 1911 paddr = kmap_atomic(sg_page(psgl)) 1912 + psgl->offset; 1913 ppage_offset = 0; 1914 } 1915 1916 sdt = paddr + ppage_offset; 1917 1918 switch (scsi_debug_guard) { 1919 case 1: 1920 csum = ip_compute_csum(daddr, 1921 scsi_debug_sector_size); 1922 break; 1923 case 0: 1924 csum = cpu_to_be16(crc_t10dif(daddr, 1925 scsi_debug_sector_size)); 1926 break; 1927 default: 1928 BUG(); 1929 ret = 0; 1930 goto out; 1931 } 1932 1933 if (sdt->guard_tag != csum) { 1934 printk(KERN_ERR 1935 "%s: GUARD check failed on sector %lu " \ 1936 "rcvd 0x%04x, calculated 0x%04x\n", 1937 __func__, (unsigned long)sector, 1938 be16_to_cpu(sdt->guard_tag), 1939 be16_to_cpu(csum)); 1940 ret = 0x01; 1941 dump_sector(daddr, scsi_debug_sector_size); 1942 goto out; 1943 } 1944 1945 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION && 1946 be32_to_cpu(sdt->ref_tag) 1947 != (start_sec & 0xffffffff)) { 1948 printk(KERN_ERR 1949 "%s: REF check failed on sector %lu\n", 1950 __func__, (unsigned long)sector); 1951 ret = 0x03; 1952 dump_sector(daddr, scsi_debug_sector_size); 1953 goto out; 1954 } 1955 1956 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && 1957 be32_to_cpu(sdt->ref_tag) != ei_lba) { 1958 printk(KERN_ERR 1959 "%s: REF check failed on sector %lu\n", 1960 __func__, (unsigned long)sector); 1961 ret = 0x03; 1962 dump_sector(daddr, scsi_debug_sector_size); 1963 goto out; 1964 } 1965 1966 /* Would be great to copy this in bigger 1967 * chunks. However, for the sake of 1968 * correctness we need to verify each sector 1969 * before writing it to "stable" storage 1970 */ 1971 memcpy(dif_storep + dif_offset(sector), sdt, 8); 1972 1973 sector++; 1974 1975 if (sector == sdebug_store_sectors) 1976 sector = 0; /* Force wrap */ 1977 1978 start_sec++; 1979 ei_lba++; 1980 daddr += scsi_debug_sector_size; 1981 ppage_offset += sizeof(struct sd_dif_tuple); 1982 } 1983 1984 kunmap_atomic(daddr); 1985 } 1986 1987 kunmap_atomic(paddr); 1988 1989 dix_writes++; 1990 1991 return 0; 1992 1993out: 1994 dif_errors++; 1995 kunmap_atomic(daddr); 1996 kunmap_atomic(paddr); 1997 return ret; 1998} 1999 2000static unsigned int map_state(sector_t lba, unsigned int *num) 2001{ 2002 unsigned int granularity, alignment, mapped; 2003 sector_t block, next, end; 2004 2005 granularity = scsi_debug_unmap_granularity; 2006 alignment = granularity - scsi_debug_unmap_alignment; 2007 block = lba + alignment; 2008 do_div(block, granularity); 2009 2010 mapped = test_bit(block, map_storep); 2011 2012 if (mapped) 2013 next = find_next_zero_bit(map_storep, map_size, block); 2014 else 2015 next = find_next_bit(map_storep, map_size, block); 2016 2017 end = next * granularity - scsi_debug_unmap_alignment; 2018 *num = end - lba; 2019 2020 return mapped; 2021} 2022 2023static void map_region(sector_t lba, unsigned int len) 2024{ 2025 unsigned int granularity, alignment; 2026 sector_t end = lba + len; 2027 2028 granularity = scsi_debug_unmap_granularity; 2029 alignment = granularity - scsi_debug_unmap_alignment; 2030 2031 while (lba < end) { 2032 sector_t block, rem; 2033 2034 block = lba + alignment; 2035 rem = do_div(block, granularity); 2036 2037 if (block < map_size) 2038 set_bit(block, map_storep); 2039 2040 lba += granularity - rem; 2041 } 2042} 2043 2044static void unmap_region(sector_t lba, unsigned int len) 2045{ 2046 unsigned int granularity, alignment; 2047 sector_t end = lba + len; 2048 2049 granularity = scsi_debug_unmap_granularity; 2050 alignment = granularity - scsi_debug_unmap_alignment; 2051 2052 while (lba < end) { 2053 sector_t block, rem; 2054 2055 block = lba + alignment; 2056 rem = do_div(block, granularity); 2057 2058 if (rem == 0 && lba + granularity <= end && block < map_size) { 2059 clear_bit(block, map_storep); 2060 if (scsi_debug_lbprz) 2061 memset(fake_storep + 2062 block * scsi_debug_sector_size, 0, 2063 scsi_debug_sector_size); 2064 } 2065 lba += granularity - rem; 2066 } 2067} 2068 2069static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba, 2070 unsigned int num, struct sdebug_dev_info *devip, 2071 u32 ei_lba) 2072{ 2073 unsigned long iflags; 2074 int ret; 2075 2076 ret = check_device_access_params(devip, lba, num); 2077 if (ret) 2078 return ret; 2079 2080 /* DIX + T10 DIF */ 2081 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) { 2082 int prot_ret = prot_verify_write(SCpnt, lba, num, ei_lba); 2083 2084 if (prot_ret) { 2085 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, prot_ret); 2086 return illegal_condition_result; 2087 } 2088 } 2089 2090 write_lock_irqsave(&atomic_rw, iflags); 2091 ret = do_device_access(SCpnt, devip, lba, num, 1); 2092 if (scsi_debug_unmap_granularity) 2093 map_region(lba, num); 2094 write_unlock_irqrestore(&atomic_rw, iflags); 2095 if (-1 == ret) 2096 return (DID_ERROR << 16); 2097 else if ((ret < (num * scsi_debug_sector_size)) && 2098 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) 2099 printk(KERN_INFO "scsi_debug: write: cdb indicated=%u, " 2100 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret); 2101 2102 return 0; 2103} 2104 2105static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba, 2106 unsigned int num, struct sdebug_dev_info *devip, 2107 u32 ei_lba, unsigned int unmap) 2108{ 2109 unsigned long iflags; 2110 unsigned long long i; 2111 int ret; 2112 2113 ret = check_device_access_params(devip, lba, num); 2114 if (ret) 2115 return ret; 2116 2117 if (num > scsi_debug_write_same_length) { 2118 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 2119 0); 2120 return check_condition_result; 2121 } 2122 2123 write_lock_irqsave(&atomic_rw, iflags); 2124 2125 if (unmap && scsi_debug_unmap_granularity) { 2126 unmap_region(lba, num); 2127 goto out; 2128 } 2129 2130 /* Else fetch one logical block */ 2131 ret = fetch_to_dev_buffer(scmd, 2132 fake_storep + (lba * scsi_debug_sector_size), 2133 scsi_debug_sector_size); 2134 2135 if (-1 == ret) { 2136 write_unlock_irqrestore(&atomic_rw, iflags); 2137 return (DID_ERROR << 16); 2138 } else if ((ret < (num * scsi_debug_sector_size)) && 2139 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) 2140 printk(KERN_INFO "scsi_debug: write same: cdb indicated=%u, " 2141 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret); 2142 2143 /* Copy first sector to remaining blocks */ 2144 for (i = 1 ; i < num ; i++) 2145 memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size), 2146 fake_storep + (lba * scsi_debug_sector_size), 2147 scsi_debug_sector_size); 2148 2149 if (scsi_debug_unmap_granularity) 2150 map_region(lba, num); 2151out: 2152 write_unlock_irqrestore(&atomic_rw, iflags); 2153 2154 return 0; 2155} 2156 2157struct unmap_block_desc { 2158 __be64 lba; 2159 __be32 blocks; 2160 __be32 __reserved; 2161}; 2162 2163static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip) 2164{ 2165 unsigned char *buf; 2166 struct unmap_block_desc *desc; 2167 unsigned int i, payload_len, descriptors; 2168 int ret; 2169 2170 ret = check_readiness(scmd, 1, devip); 2171 if (ret) 2172 return ret; 2173 2174 payload_len = get_unaligned_be16(&scmd->cmnd[7]); 2175 BUG_ON(scsi_bufflen(scmd) != payload_len); 2176 2177 descriptors = (payload_len - 8) / 16; 2178 2179 buf = kmalloc(scsi_bufflen(scmd), GFP_ATOMIC); 2180 if (!buf) 2181 return check_condition_result; 2182 2183 scsi_sg_copy_to_buffer(scmd, buf, scsi_bufflen(scmd)); 2184 2185 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2); 2186 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16); 2187 2188 desc = (void *)&buf[8]; 2189 2190 for (i = 0 ; i < descriptors ; i++) { 2191 unsigned long long lba = get_unaligned_be64(&desc[i].lba); 2192 unsigned int num = get_unaligned_be32(&desc[i].blocks); 2193 2194 ret = check_device_access_params(devip, lba, num); 2195 if (ret) 2196 goto out; 2197 2198 unmap_region(lba, num); 2199 } 2200 2201 ret = 0; 2202 2203out: 2204 kfree(buf); 2205 2206 return ret; 2207} 2208 2209#define SDEBUG_GET_LBA_STATUS_LEN 32 2210 2211static int resp_get_lba_status(struct scsi_cmnd * scmd, 2212 struct sdebug_dev_info * devip) 2213{ 2214 unsigned long long lba; 2215 unsigned int alloc_len, mapped, num; 2216 unsigned char arr[SDEBUG_GET_LBA_STATUS_LEN]; 2217 int ret; 2218 2219 ret = check_readiness(scmd, 1, devip); 2220 if (ret) 2221 return ret; 2222 2223 lba = get_unaligned_be64(&scmd->cmnd[2]); 2224 alloc_len = get_unaligned_be32(&scmd->cmnd[10]); 2225 2226 if (alloc_len < 24) 2227 return 0; 2228 2229 ret = check_device_access_params(devip, lba, 1); 2230 if (ret) 2231 return ret; 2232 2233 mapped = map_state(lba, &num); 2234 2235 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN); 2236 put_unaligned_be32(20, &arr[0]); /* Parameter Data Length */ 2237 put_unaligned_be64(lba, &arr[8]); /* LBA */ 2238 put_unaligned_be32(num, &arr[16]); /* Number of blocks */ 2239 arr[20] = !mapped; /* mapped = 0, unmapped = 1 */ 2240 2241 return fill_from_dev_buffer(scmd, arr, SDEBUG_GET_LBA_STATUS_LEN); 2242} 2243 2244#define SDEBUG_RLUN_ARR_SZ 256 2245 2246static int resp_report_luns(struct scsi_cmnd * scp, 2247 struct sdebug_dev_info * devip) 2248{ 2249 unsigned int alloc_len; 2250 int lun_cnt, i, upper, num, n, wlun, lun; 2251 unsigned char *cmd = (unsigned char *)scp->cmnd; 2252 int select_report = (int)cmd[2]; 2253 struct scsi_lun *one_lun; 2254 unsigned char arr[SDEBUG_RLUN_ARR_SZ]; 2255 unsigned char * max_addr; 2256 2257 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24); 2258 if ((alloc_len < 4) || (select_report > 2)) { 2259 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 2260 0); 2261 return check_condition_result; 2262 } 2263 /* can produce response with up to 16k luns (lun 0 to lun 16383) */ 2264 memset(arr, 0, SDEBUG_RLUN_ARR_SZ); 2265 lun_cnt = scsi_debug_max_luns; 2266 if (1 == select_report) 2267 lun_cnt = 0; 2268 else if (scsi_debug_no_lun_0 && (lun_cnt > 0)) 2269 --lun_cnt; 2270 wlun = (select_report > 0) ? 1 : 0; 2271 num = lun_cnt + wlun; 2272 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff; 2273 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff; 2274 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) / 2275 sizeof(struct scsi_lun)), num); 2276 if (n < num) { 2277 wlun = 0; 2278 lun_cnt = n; 2279 } 2280 one_lun = (struct scsi_lun *) &arr[8]; 2281 max_addr = arr + SDEBUG_RLUN_ARR_SZ; 2282 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0); 2283 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr)); 2284 i++, lun++) { 2285 upper = (lun >> 8) & 0x3f; 2286 if (upper) 2287 one_lun[i].scsi_lun[0] = 2288 (upper | (SAM2_LUN_ADDRESS_METHOD << 6)); 2289 one_lun[i].scsi_lun[1] = lun & 0xff; 2290 } 2291 if (wlun) { 2292 one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff; 2293 one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff; 2294 i++; 2295 } 2296 alloc_len = (unsigned char *)(one_lun + i) - arr; 2297 return fill_from_dev_buffer(scp, arr, 2298 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ)); 2299} 2300 2301static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba, 2302 unsigned int num, struct sdebug_dev_info *devip) 2303{ 2304 int i, j, ret = -1; 2305 unsigned char *kaddr, *buf; 2306 unsigned int offset; 2307 struct scatterlist *sg; 2308 struct scsi_data_buffer *sdb = scsi_in(scp); 2309 2310 /* better not to use temporary buffer. */ 2311 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC); 2312 if (!buf) 2313 return ret; 2314 2315 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp)); 2316 2317 offset = 0; 2318 for_each_sg(sdb->table.sgl, sg, sdb->table.nents, i) { 2319 kaddr = (unsigned char *)kmap_atomic(sg_page(sg)); 2320 if (!kaddr) 2321 goto out; 2322 2323 for (j = 0; j < sg->length; j++) 2324 *(kaddr + sg->offset + j) ^= *(buf + offset + j); 2325 2326 offset += sg->length; 2327 kunmap_atomic(kaddr); 2328 } 2329 ret = 0; 2330out: 2331 kfree(buf); 2332 2333 return ret; 2334} 2335 2336/* When timer goes off this function is called. */ 2337static void timer_intr_handler(unsigned long indx) 2338{ 2339 struct sdebug_queued_cmd * sqcp; 2340 unsigned long iflags; 2341 2342 if (indx >= scsi_debug_max_queue) { 2343 printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too " 2344 "large\n"); 2345 return; 2346 } 2347 spin_lock_irqsave(&queued_arr_lock, iflags); 2348 sqcp = &queued_arr[(int)indx]; 2349 if (! sqcp->in_use) { 2350 printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected " 2351 "interrupt\n"); 2352 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2353 return; 2354 } 2355 sqcp->in_use = 0; 2356 if (sqcp->done_funct) { 2357 sqcp->a_cmnd->result = sqcp->scsi_result; 2358 sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */ 2359 } 2360 sqcp->done_funct = NULL; 2361 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2362} 2363 2364 2365static struct sdebug_dev_info * 2366sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags) 2367{ 2368 struct sdebug_dev_info *devip; 2369 2370 devip = kzalloc(sizeof(*devip), flags); 2371 if (devip) { 2372 devip->sdbg_host = sdbg_host; 2373 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list); 2374 } 2375 return devip; 2376} 2377 2378static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev) 2379{ 2380 struct sdebug_host_info * sdbg_host; 2381 struct sdebug_dev_info * open_devip = NULL; 2382 struct sdebug_dev_info * devip = 2383 (struct sdebug_dev_info *)sdev->hostdata; 2384 2385 if (devip) 2386 return devip; 2387 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host); 2388 if (!sdbg_host) { 2389 printk(KERN_ERR "Host info NULL\n"); 2390 return NULL; 2391 } 2392 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { 2393 if ((devip->used) && (devip->channel == sdev->channel) && 2394 (devip->target == sdev->id) && 2395 (devip->lun == sdev->lun)) 2396 return devip; 2397 else { 2398 if ((!devip->used) && (!open_devip)) 2399 open_devip = devip; 2400 } 2401 } 2402 if (!open_devip) { /* try and make a new one */ 2403 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC); 2404 if (!open_devip) { 2405 printk(KERN_ERR "%s: out of memory at line %d\n", 2406 __func__, __LINE__); 2407 return NULL; 2408 } 2409 } 2410 2411 open_devip->channel = sdev->channel; 2412 open_devip->target = sdev->id; 2413 open_devip->lun = sdev->lun; 2414 open_devip->sdbg_host = sdbg_host; 2415 open_devip->reset = 1; 2416 open_devip->used = 1; 2417 memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN); 2418 if (scsi_debug_dsense) 2419 open_devip->sense_buff[0] = 0x72; 2420 else { 2421 open_devip->sense_buff[0] = 0x70; 2422 open_devip->sense_buff[7] = 0xa; 2423 } 2424 if (sdev->lun == SAM2_WLUN_REPORT_LUNS) 2425 open_devip->wlun = SAM2_WLUN_REPORT_LUNS & 0xff; 2426 2427 return open_devip; 2428} 2429 2430static int scsi_debug_slave_alloc(struct scsi_device *sdp) 2431{ 2432 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2433 printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %u>\n", 2434 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 2435 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue); 2436 return 0; 2437} 2438 2439static int scsi_debug_slave_configure(struct scsi_device *sdp) 2440{ 2441 struct sdebug_dev_info *devip; 2442 2443 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2444 printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %u>\n", 2445 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 2446 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN) 2447 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN; 2448 devip = devInfoReg(sdp); 2449 if (NULL == devip) 2450 return 1; /* no resources, will be marked offline */ 2451 sdp->hostdata = devip; 2452 if (sdp->host->cmd_per_lun) 2453 scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING, 2454 sdp->host->cmd_per_lun); 2455 blk_queue_max_segment_size(sdp->request_queue, 256 * 1024); 2456 if (scsi_debug_no_uld) 2457 sdp->no_uld_attach = 1; 2458 return 0; 2459} 2460 2461static void scsi_debug_slave_destroy(struct scsi_device *sdp) 2462{ 2463 struct sdebug_dev_info *devip = 2464 (struct sdebug_dev_info *)sdp->hostdata; 2465 2466 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2467 printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %u>\n", 2468 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 2469 if (devip) { 2470 /* make this slot available for re-use */ 2471 devip->used = 0; 2472 sdp->hostdata = NULL; 2473 } 2474} 2475 2476/* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */ 2477static int stop_queued_cmnd(struct scsi_cmnd *cmnd) 2478{ 2479 unsigned long iflags; 2480 int k; 2481 struct sdebug_queued_cmd *sqcp; 2482 2483 spin_lock_irqsave(&queued_arr_lock, iflags); 2484 for (k = 0; k < scsi_debug_max_queue; ++k) { 2485 sqcp = &queued_arr[k]; 2486 if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) { 2487 del_timer_sync(&sqcp->cmnd_timer); 2488 sqcp->in_use = 0; 2489 sqcp->a_cmnd = NULL; 2490 break; 2491 } 2492 } 2493 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2494 return (k < scsi_debug_max_queue) ? 1 : 0; 2495} 2496 2497/* Deletes (stops) timers of all queued commands */ 2498static void stop_all_queued(void) 2499{ 2500 unsigned long iflags; 2501 int k; 2502 struct sdebug_queued_cmd *sqcp; 2503 2504 spin_lock_irqsave(&queued_arr_lock, iflags); 2505 for (k = 0; k < scsi_debug_max_queue; ++k) { 2506 sqcp = &queued_arr[k]; 2507 if (sqcp->in_use && sqcp->a_cmnd) { 2508 del_timer_sync(&sqcp->cmnd_timer); 2509 sqcp->in_use = 0; 2510 sqcp->a_cmnd = NULL; 2511 } 2512 } 2513 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2514} 2515 2516static int scsi_debug_abort(struct scsi_cmnd * SCpnt) 2517{ 2518 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2519 printk(KERN_INFO "scsi_debug: abort\n"); 2520 ++num_aborts; 2521 stop_queued_cmnd(SCpnt); 2522 return SUCCESS; 2523} 2524 2525static int scsi_debug_biosparam(struct scsi_device *sdev, 2526 struct block_device * bdev, sector_t capacity, int *info) 2527{ 2528 int res; 2529 unsigned char *buf; 2530 2531 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2532 printk(KERN_INFO "scsi_debug: biosparam\n"); 2533 buf = scsi_bios_ptable(bdev); 2534 if (buf) { 2535 res = scsi_partsize(buf, capacity, 2536 &info[2], &info[0], &info[1]); 2537 kfree(buf); 2538 if (! res) 2539 return res; 2540 } 2541 info[0] = sdebug_heads; 2542 info[1] = sdebug_sectors_per; 2543 info[2] = sdebug_cylinders_per; 2544 return 0; 2545} 2546 2547static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt) 2548{ 2549 struct sdebug_dev_info * devip; 2550 2551 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2552 printk(KERN_INFO "scsi_debug: device_reset\n"); 2553 ++num_dev_resets; 2554 if (SCpnt) { 2555 devip = devInfoReg(SCpnt->device); 2556 if (devip) 2557 devip->reset = 1; 2558 } 2559 return SUCCESS; 2560} 2561 2562static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt) 2563{ 2564 struct sdebug_host_info *sdbg_host; 2565 struct sdebug_dev_info * dev_info; 2566 struct scsi_device * sdp; 2567 struct Scsi_Host * hp; 2568 2569 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2570 printk(KERN_INFO "scsi_debug: bus_reset\n"); 2571 ++num_bus_resets; 2572 if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) { 2573 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp); 2574 if (sdbg_host) { 2575 list_for_each_entry(dev_info, 2576 &sdbg_host->dev_info_list, 2577 dev_list) 2578 dev_info->reset = 1; 2579 } 2580 } 2581 return SUCCESS; 2582} 2583 2584static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt) 2585{ 2586 struct sdebug_host_info * sdbg_host; 2587 struct sdebug_dev_info * dev_info; 2588 2589 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2590 printk(KERN_INFO "scsi_debug: host_reset\n"); 2591 ++num_host_resets; 2592 spin_lock(&sdebug_host_list_lock); 2593 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { 2594 list_for_each_entry(dev_info, &sdbg_host->dev_info_list, 2595 dev_list) 2596 dev_info->reset = 1; 2597 } 2598 spin_unlock(&sdebug_host_list_lock); 2599 stop_all_queued(); 2600 return SUCCESS; 2601} 2602 2603/* Initializes timers in queued array */ 2604static void __init init_all_queued(void) 2605{ 2606 unsigned long iflags; 2607 int k; 2608 struct sdebug_queued_cmd * sqcp; 2609 2610 spin_lock_irqsave(&queued_arr_lock, iflags); 2611 for (k = 0; k < scsi_debug_max_queue; ++k) { 2612 sqcp = &queued_arr[k]; 2613 init_timer(&sqcp->cmnd_timer); 2614 sqcp->in_use = 0; 2615 sqcp->a_cmnd = NULL; 2616 } 2617 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2618} 2619 2620static void __init sdebug_build_parts(unsigned char *ramp, 2621 unsigned long store_size) 2622{ 2623 struct partition * pp; 2624 int starts[SDEBUG_MAX_PARTS + 2]; 2625 int sectors_per_part, num_sectors, k; 2626 int heads_by_sects, start_sec, end_sec; 2627 2628 /* assume partition table already zeroed */ 2629 if ((scsi_debug_num_parts < 1) || (store_size < 1048576)) 2630 return; 2631 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) { 2632 scsi_debug_num_parts = SDEBUG_MAX_PARTS; 2633 printk(KERN_WARNING "scsi_debug:build_parts: reducing " 2634 "partitions to %d\n", SDEBUG_MAX_PARTS); 2635 } 2636 num_sectors = (int)sdebug_store_sectors; 2637 sectors_per_part = (num_sectors - sdebug_sectors_per) 2638 / scsi_debug_num_parts; 2639 heads_by_sects = sdebug_heads * sdebug_sectors_per; 2640 starts[0] = sdebug_sectors_per; 2641 for (k = 1; k < scsi_debug_num_parts; ++k) 2642 starts[k] = ((k * sectors_per_part) / heads_by_sects) 2643 * heads_by_sects; 2644 starts[scsi_debug_num_parts] = num_sectors; 2645 starts[scsi_debug_num_parts + 1] = 0; 2646 2647 ramp[510] = 0x55; /* magic partition markings */ 2648 ramp[511] = 0xAA; 2649 pp = (struct partition *)(ramp + 0x1be); 2650 for (k = 0; starts[k + 1]; ++k, ++pp) { 2651 start_sec = starts[k]; 2652 end_sec = starts[k + 1] - 1; 2653 pp->boot_ind = 0; 2654 2655 pp->cyl = start_sec / heads_by_sects; 2656 pp->head = (start_sec - (pp->cyl * heads_by_sects)) 2657 / sdebug_sectors_per; 2658 pp->sector = (start_sec % sdebug_sectors_per) + 1; 2659 2660 pp->end_cyl = end_sec / heads_by_sects; 2661 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects)) 2662 / sdebug_sectors_per; 2663 pp->end_sector = (end_sec % sdebug_sectors_per) + 1; 2664 2665 pp->start_sect = start_sec; 2666 pp->nr_sects = end_sec - start_sec + 1; 2667 pp->sys_ind = 0x83; /* plain Linux partition */ 2668 } 2669} 2670 2671static int schedule_resp(struct scsi_cmnd * cmnd, 2672 struct sdebug_dev_info * devip, 2673 done_funct_t done, int scsi_result, int delta_jiff) 2674{ 2675 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) { 2676 if (scsi_result) { 2677 struct scsi_device * sdp = cmnd->device; 2678 2679 printk(KERN_INFO "scsi_debug: <%u %u %u %u> " 2680 "non-zero result=0x%x\n", sdp->host->host_no, 2681 sdp->channel, sdp->id, sdp->lun, scsi_result); 2682 } 2683 } 2684 if (cmnd && devip) { 2685 /* simulate autosense by this driver */ 2686 if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff)) 2687 memcpy(cmnd->sense_buffer, devip->sense_buff, 2688 (SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ? 2689 SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE); 2690 } 2691 if (delta_jiff <= 0) { 2692 if (cmnd) 2693 cmnd->result = scsi_result; 2694 if (done) 2695 done(cmnd); 2696 return 0; 2697 } else { 2698 unsigned long iflags; 2699 int k; 2700 struct sdebug_queued_cmd * sqcp = NULL; 2701 2702 spin_lock_irqsave(&queued_arr_lock, iflags); 2703 for (k = 0; k < scsi_debug_max_queue; ++k) { 2704 sqcp = &queued_arr[k]; 2705 if (! sqcp->in_use) 2706 break; 2707 } 2708 if (k >= scsi_debug_max_queue) { 2709 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2710 printk(KERN_WARNING "scsi_debug: can_queue exceeded\n"); 2711 return 1; /* report busy to mid level */ 2712 } 2713 sqcp->in_use = 1; 2714 sqcp->a_cmnd = cmnd; 2715 sqcp->scsi_result = scsi_result; 2716 sqcp->done_funct = done; 2717 sqcp->cmnd_timer.function = timer_intr_handler; 2718 sqcp->cmnd_timer.data = k; 2719 sqcp->cmnd_timer.expires = jiffies + delta_jiff; 2720 add_timer(&sqcp->cmnd_timer); 2721 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2722 if (cmnd) 2723 cmnd->result = 0; 2724 return 0; 2725 } 2726} 2727/* Note: The following macros create attribute files in the 2728 /sys/module/scsi_debug/parameters directory. Unfortunately this 2729 driver is unaware of a change and cannot trigger auxiliary actions 2730 as it can when the corresponding attribute in the 2731 /sys/bus/pseudo/drivers/scsi_debug directory is changed. 2732 */ 2733module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR); 2734module_param_named(ato, scsi_debug_ato, int, S_IRUGO); 2735module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR); 2736module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO); 2737module_param_named(dif, scsi_debug_dif, int, S_IRUGO); 2738module_param_named(dix, scsi_debug_dix, int, S_IRUGO); 2739module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR); 2740module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR); 2741module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR); 2742module_param_named(guard, scsi_debug_guard, int, S_IRUGO); 2743module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO); 2744module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO); 2745module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO); 2746module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO); 2747module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO); 2748module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR); 2749module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR); 2750module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR); 2751module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO); 2752module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO); 2753module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR); 2754module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO); 2755module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR); 2756module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO); 2757module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR); 2758module_param_named(removable, scsi_debug_removable, bool, S_IRUGO | S_IWUSR); 2759module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO); 2760module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO); 2761module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO); 2762module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO); 2763module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO); 2764module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO); 2765module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR); 2766module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int, 2767 S_IRUGO | S_IWUSR); 2768module_param_named(write_same_length, scsi_debug_write_same_length, int, 2769 S_IRUGO | S_IWUSR); 2770 2771MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert"); 2772MODULE_DESCRIPTION("SCSI debug adapter driver"); 2773MODULE_LICENSE("GPL"); 2774MODULE_VERSION(SCSI_DEBUG_VERSION); 2775 2776MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)"); 2777MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)"); 2778MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)"); 2779MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)"); 2780MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)"); 2781MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)"); 2782MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)"); 2783MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)"); 2784MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)"); 2785MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)"); 2786MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)"); 2787MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)"); 2788MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)"); 2789MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)"); 2790MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)"); 2791MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)"); 2792MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to 255(def))"); 2793MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)"); 2794MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))"); 2795MODULE_PARM_DESC(num_parts, "number of partitions(def=0)"); 2796MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)"); 2797MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)"); 2798MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)"); 2799MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)"); 2800MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])"); 2801MODULE_PARM_DESC(removable, "claim to have removable media (def=0)"); 2802MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])"); 2803MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)"); 2804MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)"); 2805MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)"); 2806MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)"); 2807MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)"); 2808MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)"); 2809MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)"); 2810MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)"); 2811 2812static char sdebug_info[256]; 2813 2814static const char * scsi_debug_info(struct Scsi_Host * shp) 2815{ 2816 sprintf(sdebug_info, "scsi_debug, version %s [%s], " 2817 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION, 2818 scsi_debug_version_date, scsi_debug_dev_size_mb, 2819 scsi_debug_opts); 2820 return sdebug_info; 2821} 2822 2823/* scsi_debug_proc_info 2824 * Used if the driver currently has no own support for /proc/scsi 2825 */ 2826static int scsi_debug_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset, 2827 int length, int inout) 2828{ 2829 int len, pos, begin; 2830 int orig_length; 2831 2832 orig_length = length; 2833 2834 if (inout == 1) { 2835 char arr[16]; 2836 int minLen = length > 15 ? 15 : length; 2837 2838 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 2839 return -EACCES; 2840 memcpy(arr, buffer, minLen); 2841 arr[minLen] = '\0'; 2842 if (1 != sscanf(arr, "%d", &pos)) 2843 return -EINVAL; 2844 scsi_debug_opts = pos; 2845 if (scsi_debug_every_nth != 0) 2846 scsi_debug_cmnd_count = 0; 2847 return length; 2848 } 2849 begin = 0; 2850 pos = len = sprintf(buffer, "scsi_debug adapter driver, version " 2851 "%s [%s]\n" 2852 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, " 2853 "every_nth=%d(curr:%d)\n" 2854 "delay=%d, max_luns=%d, scsi_level=%d\n" 2855 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n" 2856 "number of aborts=%d, device_reset=%d, bus_resets=%d, " 2857 "host_resets=%d\ndix_reads=%d dix_writes=%d dif_errors=%d\n", 2858 SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts, 2859 scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth, 2860 scsi_debug_cmnd_count, scsi_debug_delay, 2861 scsi_debug_max_luns, scsi_debug_scsi_level, 2862 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads, 2863 sdebug_sectors_per, num_aborts, num_dev_resets, num_bus_resets, 2864 num_host_resets, dix_reads, dix_writes, dif_errors); 2865 if (pos < offset) { 2866 len = 0; 2867 begin = pos; 2868 } 2869 *start = buffer + (offset - begin); /* Start of wanted data */ 2870 len -= (offset - begin); 2871 if (len > length) 2872 len = length; 2873 return len; 2874} 2875 2876static ssize_t sdebug_delay_show(struct device_driver * ddp, char * buf) 2877{ 2878 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay); 2879} 2880 2881static ssize_t sdebug_delay_store(struct device_driver * ddp, 2882 const char * buf, size_t count) 2883{ 2884 int delay; 2885 char work[20]; 2886 2887 if (1 == sscanf(buf, "%10s", work)) { 2888 if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) { 2889 scsi_debug_delay = delay; 2890 return count; 2891 } 2892 } 2893 return -EINVAL; 2894} 2895DRIVER_ATTR(delay, S_IRUGO | S_IWUSR, sdebug_delay_show, 2896 sdebug_delay_store); 2897 2898static ssize_t sdebug_opts_show(struct device_driver * ddp, char * buf) 2899{ 2900 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts); 2901} 2902 2903static ssize_t sdebug_opts_store(struct device_driver * ddp, 2904 const char * buf, size_t count) 2905{ 2906 int opts; 2907 char work[20]; 2908 2909 if (1 == sscanf(buf, "%10s", work)) { 2910 if (0 == strnicmp(work,"0x", 2)) { 2911 if (1 == sscanf(&work[2], "%x", &opts)) 2912 goto opts_done; 2913 } else { 2914 if (1 == sscanf(work, "%d", &opts)) 2915 goto opts_done; 2916 } 2917 } 2918 return -EINVAL; 2919opts_done: 2920 scsi_debug_opts = opts; 2921 scsi_debug_cmnd_count = 0; 2922 return count; 2923} 2924DRIVER_ATTR(opts, S_IRUGO | S_IWUSR, sdebug_opts_show, 2925 sdebug_opts_store); 2926 2927static ssize_t sdebug_ptype_show(struct device_driver * ddp, char * buf) 2928{ 2929 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype); 2930} 2931static ssize_t sdebug_ptype_store(struct device_driver * ddp, 2932 const char * buf, size_t count) 2933{ 2934 int n; 2935 2936 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 2937 scsi_debug_ptype = n; 2938 return count; 2939 } 2940 return -EINVAL; 2941} 2942DRIVER_ATTR(ptype, S_IRUGO | S_IWUSR, sdebug_ptype_show, sdebug_ptype_store); 2943 2944static ssize_t sdebug_dsense_show(struct device_driver * ddp, char * buf) 2945{ 2946 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense); 2947} 2948static ssize_t sdebug_dsense_store(struct device_driver * ddp, 2949 const char * buf, size_t count) 2950{ 2951 int n; 2952 2953 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 2954 scsi_debug_dsense = n; 2955 return count; 2956 } 2957 return -EINVAL; 2958} 2959DRIVER_ATTR(dsense, S_IRUGO | S_IWUSR, sdebug_dsense_show, 2960 sdebug_dsense_store); 2961 2962static ssize_t sdebug_fake_rw_show(struct device_driver * ddp, char * buf) 2963{ 2964 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw); 2965} 2966static ssize_t sdebug_fake_rw_store(struct device_driver * ddp, 2967 const char * buf, size_t count) 2968{ 2969 int n; 2970 2971 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 2972 scsi_debug_fake_rw = n; 2973 return count; 2974 } 2975 return -EINVAL; 2976} 2977DRIVER_ATTR(fake_rw, S_IRUGO | S_IWUSR, sdebug_fake_rw_show, 2978 sdebug_fake_rw_store); 2979 2980static ssize_t sdebug_no_lun_0_show(struct device_driver * ddp, char * buf) 2981{ 2982 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0); 2983} 2984static ssize_t sdebug_no_lun_0_store(struct device_driver * ddp, 2985 const char * buf, size_t count) 2986{ 2987 int n; 2988 2989 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 2990 scsi_debug_no_lun_0 = n; 2991 return count; 2992 } 2993 return -EINVAL; 2994} 2995DRIVER_ATTR(no_lun_0, S_IRUGO | S_IWUSR, sdebug_no_lun_0_show, 2996 sdebug_no_lun_0_store); 2997 2998static ssize_t sdebug_num_tgts_show(struct device_driver * ddp, char * buf) 2999{ 3000 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts); 3001} 3002static ssize_t sdebug_num_tgts_store(struct device_driver * ddp, 3003 const char * buf, size_t count) 3004{ 3005 int n; 3006 3007 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 3008 scsi_debug_num_tgts = n; 3009 sdebug_max_tgts_luns(); 3010 return count; 3011 } 3012 return -EINVAL; 3013} 3014DRIVER_ATTR(num_tgts, S_IRUGO | S_IWUSR, sdebug_num_tgts_show, 3015 sdebug_num_tgts_store); 3016 3017static ssize_t sdebug_dev_size_mb_show(struct device_driver * ddp, char * buf) 3018{ 3019 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb); 3020} 3021DRIVER_ATTR(dev_size_mb, S_IRUGO, sdebug_dev_size_mb_show, NULL); 3022 3023static ssize_t sdebug_num_parts_show(struct device_driver * ddp, char * buf) 3024{ 3025 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts); 3026} 3027DRIVER_ATTR(num_parts, S_IRUGO, sdebug_num_parts_show, NULL); 3028 3029static ssize_t sdebug_every_nth_show(struct device_driver * ddp, char * buf) 3030{ 3031 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth); 3032} 3033static ssize_t sdebug_every_nth_store(struct device_driver * ddp, 3034 const char * buf, size_t count) 3035{ 3036 int nth; 3037 3038 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) { 3039 scsi_debug_every_nth = nth; 3040 scsi_debug_cmnd_count = 0; 3041 return count; 3042 } 3043 return -EINVAL; 3044} 3045DRIVER_ATTR(every_nth, S_IRUGO | S_IWUSR, sdebug_every_nth_show, 3046 sdebug_every_nth_store); 3047 3048static ssize_t sdebug_max_luns_show(struct device_driver * ddp, char * buf) 3049{ 3050 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns); 3051} 3052static ssize_t sdebug_max_luns_store(struct device_driver * ddp, 3053 const char * buf, size_t count) 3054{ 3055 int n; 3056 3057 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 3058 scsi_debug_max_luns = n; 3059 sdebug_max_tgts_luns(); 3060 return count; 3061 } 3062 return -EINVAL; 3063} 3064DRIVER_ATTR(max_luns, S_IRUGO | S_IWUSR, sdebug_max_luns_show, 3065 sdebug_max_luns_store); 3066 3067static ssize_t sdebug_max_queue_show(struct device_driver * ddp, char * buf) 3068{ 3069 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue); 3070} 3071static ssize_t sdebug_max_queue_store(struct device_driver * ddp, 3072 const char * buf, size_t count) 3073{ 3074 int n; 3075 3076 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) && 3077 (n <= SCSI_DEBUG_CANQUEUE)) { 3078 scsi_debug_max_queue = n; 3079 return count; 3080 } 3081 return -EINVAL; 3082} 3083DRIVER_ATTR(max_queue, S_IRUGO | S_IWUSR, sdebug_max_queue_show, 3084 sdebug_max_queue_store); 3085 3086static ssize_t sdebug_no_uld_show(struct device_driver * ddp, char * buf) 3087{ 3088 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld); 3089} 3090DRIVER_ATTR(no_uld, S_IRUGO, sdebug_no_uld_show, NULL); 3091 3092static ssize_t sdebug_scsi_level_show(struct device_driver * ddp, char * buf) 3093{ 3094 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level); 3095} 3096DRIVER_ATTR(scsi_level, S_IRUGO, sdebug_scsi_level_show, NULL); 3097 3098static ssize_t sdebug_virtual_gb_show(struct device_driver * ddp, char * buf) 3099{ 3100 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb); 3101} 3102static ssize_t sdebug_virtual_gb_store(struct device_driver * ddp, 3103 const char * buf, size_t count) 3104{ 3105 int n; 3106 3107 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 3108 scsi_debug_virtual_gb = n; 3109 3110 sdebug_capacity = get_sdebug_capacity(); 3111 3112 return count; 3113 } 3114 return -EINVAL; 3115} 3116DRIVER_ATTR(virtual_gb, S_IRUGO | S_IWUSR, sdebug_virtual_gb_show, 3117 sdebug_virtual_gb_store); 3118 3119static ssize_t sdebug_add_host_show(struct device_driver * ddp, char * buf) 3120{ 3121 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host); 3122} 3123 3124static ssize_t sdebug_add_host_store(struct device_driver * ddp, 3125 const char * buf, size_t count) 3126{ 3127 int delta_hosts; 3128 3129 if (sscanf(buf, "%d", &delta_hosts) != 1) 3130 return -EINVAL; 3131 if (delta_hosts > 0) { 3132 do { 3133 sdebug_add_adapter(); 3134 } while (--delta_hosts); 3135 } else if (delta_hosts < 0) { 3136 do { 3137 sdebug_remove_adapter(); 3138 } while (++delta_hosts); 3139 } 3140 return count; 3141} 3142DRIVER_ATTR(add_host, S_IRUGO | S_IWUSR, sdebug_add_host_show, 3143 sdebug_add_host_store); 3144 3145static ssize_t sdebug_vpd_use_hostno_show(struct device_driver * ddp, 3146 char * buf) 3147{ 3148 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno); 3149} 3150static ssize_t sdebug_vpd_use_hostno_store(struct device_driver * ddp, 3151 const char * buf, size_t count) 3152{ 3153 int n; 3154 3155 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 3156 scsi_debug_vpd_use_hostno = n; 3157 return count; 3158 } 3159 return -EINVAL; 3160} 3161DRIVER_ATTR(vpd_use_hostno, S_IRUGO | S_IWUSR, sdebug_vpd_use_hostno_show, 3162 sdebug_vpd_use_hostno_store); 3163 3164static ssize_t sdebug_sector_size_show(struct device_driver * ddp, char * buf) 3165{ 3166 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size); 3167} 3168DRIVER_ATTR(sector_size, S_IRUGO, sdebug_sector_size_show, NULL); 3169 3170static ssize_t sdebug_dix_show(struct device_driver *ddp, char *buf) 3171{ 3172 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix); 3173} 3174DRIVER_ATTR(dix, S_IRUGO, sdebug_dix_show, NULL); 3175 3176static ssize_t sdebug_dif_show(struct device_driver *ddp, char *buf) 3177{ 3178 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif); 3179} 3180DRIVER_ATTR(dif, S_IRUGO, sdebug_dif_show, NULL); 3181 3182static ssize_t sdebug_guard_show(struct device_driver *ddp, char *buf) 3183{ 3184 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_guard); 3185} 3186DRIVER_ATTR(guard, S_IRUGO, sdebug_guard_show, NULL); 3187 3188static ssize_t sdebug_ato_show(struct device_driver *ddp, char *buf) 3189{ 3190 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato); 3191} 3192DRIVER_ATTR(ato, S_IRUGO, sdebug_ato_show, NULL); 3193 3194static ssize_t sdebug_map_show(struct device_driver *ddp, char *buf) 3195{ 3196 ssize_t count; 3197 3198 if (!scsi_debug_lbp()) 3199 return scnprintf(buf, PAGE_SIZE, "0-%u\n", 3200 sdebug_store_sectors); 3201 3202 count = bitmap_scnlistprintf(buf, PAGE_SIZE, map_storep, map_size); 3203 3204 buf[count++] = '\n'; 3205 buf[count++] = 0; 3206 3207 return count; 3208} 3209DRIVER_ATTR(map, S_IRUGO, sdebug_map_show, NULL); 3210 3211static ssize_t sdebug_removable_show(struct device_driver *ddp, 3212 char *buf) 3213{ 3214 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_removable ? 1 : 0); 3215} 3216static ssize_t sdebug_removable_store(struct device_driver *ddp, 3217 const char *buf, size_t count) 3218{ 3219 int n; 3220 3221 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 3222 scsi_debug_removable = (n > 0); 3223 return count; 3224 } 3225 return -EINVAL; 3226} 3227DRIVER_ATTR(removable, S_IRUGO | S_IWUSR, sdebug_removable_show, 3228 sdebug_removable_store); 3229 3230 3231/* Note: The following function creates attribute files in the 3232 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these 3233 files (over those found in the /sys/module/scsi_debug/parameters 3234 directory) is that auxiliary actions can be triggered when an attribute 3235 is changed. For example see: sdebug_add_host_store() above. 3236 */ 3237static int do_create_driverfs_files(void) 3238{ 3239 int ret; 3240 3241 ret = driver_create_file(&sdebug_driverfs_driver, &driver_attr_add_host); 3242 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay); 3243 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb); 3244 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dsense); 3245 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_every_nth); 3246 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_fake_rw); 3247 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_luns); 3248 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_queue); 3249 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0); 3250 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_uld); 3251 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_parts); 3252 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_tgts); 3253 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ptype); 3254 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_opts); 3255 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_removable); 3256 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level); 3257 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb); 3258 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno); 3259 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_sector_size); 3260 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dix); 3261 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dif); 3262 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_guard); 3263 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ato); 3264 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_map); 3265 return ret; 3266} 3267 3268static void do_remove_driverfs_files(void) 3269{ 3270 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_map); 3271 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ato); 3272 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_guard); 3273 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dif); 3274 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dix); 3275 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_sector_size); 3276 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno); 3277 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb); 3278 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level); 3279 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_opts); 3280 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ptype); 3281 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_removable); 3282 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_tgts); 3283 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_parts); 3284 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_uld); 3285 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0); 3286 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_queue); 3287 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_luns); 3288 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_fake_rw); 3289 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_every_nth); 3290 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dsense); 3291 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb); 3292 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay); 3293 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host); 3294} 3295 3296struct device *pseudo_primary; 3297 3298static int __init scsi_debug_init(void) 3299{ 3300 unsigned long sz; 3301 int host_to_add; 3302 int k; 3303 int ret; 3304 3305 switch (scsi_debug_sector_size) { 3306 case 512: 3307 case 1024: 3308 case 2048: 3309 case 4096: 3310 break; 3311 default: 3312 printk(KERN_ERR "scsi_debug_init: invalid sector_size %d\n", 3313 scsi_debug_sector_size); 3314 return -EINVAL; 3315 } 3316 3317 switch (scsi_debug_dif) { 3318 3319 case SD_DIF_TYPE0_PROTECTION: 3320 case SD_DIF_TYPE1_PROTECTION: 3321 case SD_DIF_TYPE2_PROTECTION: 3322 case SD_DIF_TYPE3_PROTECTION: 3323 break; 3324 3325 default: 3326 printk(KERN_ERR "scsi_debug_init: dif must be 0, 1, 2 or 3\n"); 3327 return -EINVAL; 3328 } 3329 3330 if (scsi_debug_guard > 1) { 3331 printk(KERN_ERR "scsi_debug_init: guard must be 0 or 1\n"); 3332 return -EINVAL; 3333 } 3334 3335 if (scsi_debug_ato > 1) { 3336 printk(KERN_ERR "scsi_debug_init: ato must be 0 or 1\n"); 3337 return -EINVAL; 3338 } 3339 3340 if (scsi_debug_physblk_exp > 15) { 3341 printk(KERN_ERR "scsi_debug_init: invalid physblk_exp %u\n", 3342 scsi_debug_physblk_exp); 3343 return -EINVAL; 3344 } 3345 3346 if (scsi_debug_lowest_aligned > 0x3fff) { 3347 printk(KERN_ERR "scsi_debug_init: lowest_aligned too big: %u\n", 3348 scsi_debug_lowest_aligned); 3349 return -EINVAL; 3350 } 3351 3352 if (scsi_debug_dev_size_mb < 1) 3353 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */ 3354 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576; 3355 sdebug_store_sectors = sz / scsi_debug_sector_size; 3356 sdebug_capacity = get_sdebug_capacity(); 3357 3358 /* play around with geometry, don't waste too much on track 0 */ 3359 sdebug_heads = 8; 3360 sdebug_sectors_per = 32; 3361 if (scsi_debug_dev_size_mb >= 16) 3362 sdebug_heads = 32; 3363 else if (scsi_debug_dev_size_mb >= 256) 3364 sdebug_heads = 64; 3365 sdebug_cylinders_per = (unsigned long)sdebug_capacity / 3366 (sdebug_sectors_per * sdebug_heads); 3367 if (sdebug_cylinders_per >= 1024) { 3368 /* other LLDs do this; implies >= 1GB ram disk ... */ 3369 sdebug_heads = 255; 3370 sdebug_sectors_per = 63; 3371 sdebug_cylinders_per = (unsigned long)sdebug_capacity / 3372 (sdebug_sectors_per * sdebug_heads); 3373 } 3374 3375 fake_storep = vmalloc(sz); 3376 if (NULL == fake_storep) { 3377 printk(KERN_ERR "scsi_debug_init: out of memory, 1\n"); 3378 return -ENOMEM; 3379 } 3380 memset(fake_storep, 0, sz); 3381 if (scsi_debug_num_parts > 0) 3382 sdebug_build_parts(fake_storep, sz); 3383 3384 if (scsi_debug_dif) { 3385 int dif_size; 3386 3387 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple); 3388 dif_storep = vmalloc(dif_size); 3389 3390 printk(KERN_ERR "scsi_debug_init: dif_storep %u bytes @ %p\n", 3391 dif_size, dif_storep); 3392 3393 if (dif_storep == NULL) { 3394 printk(KERN_ERR "scsi_debug_init: out of mem. (DIX)\n"); 3395 ret = -ENOMEM; 3396 goto free_vm; 3397 } 3398 3399 memset(dif_storep, 0xff, dif_size); 3400 } 3401 3402 /* Logical Block Provisioning */ 3403 if (scsi_debug_lbp()) { 3404 unsigned int map_bytes; 3405 3406 scsi_debug_unmap_max_blocks = 3407 clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU); 3408 3409 scsi_debug_unmap_max_desc = 3410 clamp(scsi_debug_unmap_max_desc, 0U, 256U); 3411 3412 scsi_debug_unmap_granularity = 3413 clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU); 3414 3415 if (scsi_debug_unmap_alignment && 3416 scsi_debug_unmap_granularity < scsi_debug_unmap_alignment) { 3417 printk(KERN_ERR 3418 "%s: ERR: unmap_granularity < unmap_alignment\n", 3419 __func__); 3420 return -EINVAL; 3421 } 3422 3423 map_size = (sdebug_store_sectors / scsi_debug_unmap_granularity); 3424 map_bytes = map_size >> 3; 3425 map_storep = vmalloc(map_bytes); 3426 3427 printk(KERN_INFO "scsi_debug_init: %lu provisioning blocks\n", 3428 map_size); 3429 3430 if (map_storep == NULL) { 3431 printk(KERN_ERR "scsi_debug_init: out of mem. (MAP)\n"); 3432 ret = -ENOMEM; 3433 goto free_vm; 3434 } 3435 3436 memset(map_storep, 0x0, map_bytes); 3437 3438 /* Map first 1KB for partition table */ 3439 if (scsi_debug_num_parts) 3440 map_region(0, 2); 3441 } 3442 3443 pseudo_primary = root_device_register("pseudo_0"); 3444 if (IS_ERR(pseudo_primary)) { 3445 printk(KERN_WARNING "scsi_debug: root_device_register() error\n"); 3446 ret = PTR_ERR(pseudo_primary); 3447 goto free_vm; 3448 } 3449 ret = bus_register(&pseudo_lld_bus); 3450 if (ret < 0) { 3451 printk(KERN_WARNING "scsi_debug: bus_register error: %d\n", 3452 ret); 3453 goto dev_unreg; 3454 } 3455 ret = driver_register(&sdebug_driverfs_driver); 3456 if (ret < 0) { 3457 printk(KERN_WARNING "scsi_debug: driver_register error: %d\n", 3458 ret); 3459 goto bus_unreg; 3460 } 3461 ret = do_create_driverfs_files(); 3462 if (ret < 0) { 3463 printk(KERN_WARNING "scsi_debug: driver_create_file error: %d\n", 3464 ret); 3465 goto del_files; 3466 } 3467 3468 init_all_queued(); 3469 3470 host_to_add = scsi_debug_add_host; 3471 scsi_debug_add_host = 0; 3472 3473 for (k = 0; k < host_to_add; k++) { 3474 if (sdebug_add_adapter()) { 3475 printk(KERN_ERR "scsi_debug_init: " 3476 "sdebug_add_adapter failed k=%d\n", k); 3477 break; 3478 } 3479 } 3480 3481 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) { 3482 printk(KERN_INFO "scsi_debug_init: built %d host(s)\n", 3483 scsi_debug_add_host); 3484 } 3485 return 0; 3486 3487del_files: 3488 do_remove_driverfs_files(); 3489 driver_unregister(&sdebug_driverfs_driver); 3490bus_unreg: 3491 bus_unregister(&pseudo_lld_bus); 3492dev_unreg: 3493 root_device_unregister(pseudo_primary); 3494free_vm: 3495 if (map_storep) 3496 vfree(map_storep); 3497 if (dif_storep) 3498 vfree(dif_storep); 3499 vfree(fake_storep); 3500 3501 return ret; 3502} 3503 3504static void __exit scsi_debug_exit(void) 3505{ 3506 int k = scsi_debug_add_host; 3507 3508 stop_all_queued(); 3509 for (; k; k--) 3510 sdebug_remove_adapter(); 3511 do_remove_driverfs_files(); 3512 driver_unregister(&sdebug_driverfs_driver); 3513 bus_unregister(&pseudo_lld_bus); 3514 root_device_unregister(pseudo_primary); 3515 3516 if (dif_storep) 3517 vfree(dif_storep); 3518 3519 vfree(fake_storep); 3520} 3521 3522device_initcall(scsi_debug_init); 3523module_exit(scsi_debug_exit); 3524 3525static void sdebug_release_adapter(struct device * dev) 3526{ 3527 struct sdebug_host_info *sdbg_host; 3528 3529 sdbg_host = to_sdebug_host(dev); 3530 kfree(sdbg_host); 3531} 3532 3533static int sdebug_add_adapter(void) 3534{ 3535 int k, devs_per_host; 3536 int error = 0; 3537 struct sdebug_host_info *sdbg_host; 3538 struct sdebug_dev_info *sdbg_devinfo, *tmp; 3539 3540 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL); 3541 if (NULL == sdbg_host) { 3542 printk(KERN_ERR "%s: out of memory at line %d\n", 3543 __func__, __LINE__); 3544 return -ENOMEM; 3545 } 3546 3547 INIT_LIST_HEAD(&sdbg_host->dev_info_list); 3548 3549 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns; 3550 for (k = 0; k < devs_per_host; k++) { 3551 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL); 3552 if (!sdbg_devinfo) { 3553 printk(KERN_ERR "%s: out of memory at line %d\n", 3554 __func__, __LINE__); 3555 error = -ENOMEM; 3556 goto clean; 3557 } 3558 } 3559 3560 spin_lock(&sdebug_host_list_lock); 3561 list_add_tail(&sdbg_host->host_list, &sdebug_host_list); 3562 spin_unlock(&sdebug_host_list_lock); 3563 3564 sdbg_host->dev.bus = &pseudo_lld_bus; 3565 sdbg_host->dev.parent = pseudo_primary; 3566 sdbg_host->dev.release = &sdebug_release_adapter; 3567 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host); 3568 3569 error = device_register(&sdbg_host->dev); 3570 3571 if (error) 3572 goto clean; 3573 3574 ++scsi_debug_add_host; 3575 return error; 3576 3577clean: 3578 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list, 3579 dev_list) { 3580 list_del(&sdbg_devinfo->dev_list); 3581 kfree(sdbg_devinfo); 3582 } 3583 3584 kfree(sdbg_host); 3585 return error; 3586} 3587 3588static void sdebug_remove_adapter(void) 3589{ 3590 struct sdebug_host_info * sdbg_host = NULL; 3591 3592 spin_lock(&sdebug_host_list_lock); 3593 if (!list_empty(&sdebug_host_list)) { 3594 sdbg_host = list_entry(sdebug_host_list.prev, 3595 struct sdebug_host_info, host_list); 3596 list_del(&sdbg_host->host_list); 3597 } 3598 spin_unlock(&sdebug_host_list_lock); 3599 3600 if (!sdbg_host) 3601 return; 3602 3603 device_unregister(&sdbg_host->dev); 3604 --scsi_debug_add_host; 3605} 3606 3607static 3608int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done) 3609{ 3610 unsigned char *cmd = (unsigned char *) SCpnt->cmnd; 3611 int len, k; 3612 unsigned int num; 3613 unsigned long long lba; 3614 u32 ei_lba; 3615 int errsts = 0; 3616 int target = SCpnt->device->id; 3617 struct sdebug_dev_info *devip = NULL; 3618 int inj_recovered = 0; 3619 int inj_transport = 0; 3620 int inj_dif = 0; 3621 int inj_dix = 0; 3622 int delay_override = 0; 3623 int unmap = 0; 3624 3625 scsi_set_resid(SCpnt, 0); 3626 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) { 3627 printk(KERN_INFO "scsi_debug: cmd "); 3628 for (k = 0, len = SCpnt->cmd_len; k < len; ++k) 3629 printk("%02x ", (int)cmd[k]); 3630 printk("\n"); 3631 } 3632 3633 if (target == SCpnt->device->host->hostt->this_id) { 3634 printk(KERN_INFO "scsi_debug: initiator's id used as " 3635 "target!\n"); 3636 return schedule_resp(SCpnt, NULL, done, 3637 DID_NO_CONNECT << 16, 0); 3638 } 3639 3640 if ((SCpnt->device->lun >= scsi_debug_max_luns) && 3641 (SCpnt->device->lun != SAM2_WLUN_REPORT_LUNS)) 3642 return schedule_resp(SCpnt, NULL, done, 3643 DID_NO_CONNECT << 16, 0); 3644 devip = devInfoReg(SCpnt->device); 3645 if (NULL == devip) 3646 return schedule_resp(SCpnt, NULL, done, 3647 DID_NO_CONNECT << 16, 0); 3648 3649 if ((scsi_debug_every_nth != 0) && 3650 (++scsi_debug_cmnd_count >= abs(scsi_debug_every_nth))) { 3651 scsi_debug_cmnd_count = 0; 3652 if (scsi_debug_every_nth < -1) 3653 scsi_debug_every_nth = -1; 3654 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts) 3655 return 0; /* ignore command causing timeout */ 3656 else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts && 3657 scsi_medium_access_command(SCpnt)) 3658 return 0; /* time out reads and writes */ 3659 else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts) 3660 inj_recovered = 1; /* to reads and writes below */ 3661 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & scsi_debug_opts) 3662 inj_transport = 1; /* to reads and writes below */ 3663 else if (SCSI_DEBUG_OPT_DIF_ERR & scsi_debug_opts) 3664 inj_dif = 1; /* to reads and writes below */ 3665 else if (SCSI_DEBUG_OPT_DIX_ERR & scsi_debug_opts) 3666 inj_dix = 1; /* to reads and writes below */ 3667 } 3668 3669 if (devip->wlun) { 3670 switch (*cmd) { 3671 case INQUIRY: 3672 case REQUEST_SENSE: 3673 case TEST_UNIT_READY: 3674 case REPORT_LUNS: 3675 break; /* only allowable wlun commands */ 3676 default: 3677 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 3678 printk(KERN_INFO "scsi_debug: Opcode: 0x%x " 3679 "not supported for wlun\n", *cmd); 3680 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3681 INVALID_OPCODE, 0); 3682 errsts = check_condition_result; 3683 return schedule_resp(SCpnt, devip, done, errsts, 3684 0); 3685 } 3686 } 3687 3688 switch (*cmd) { 3689 case INQUIRY: /* mandatory, ignore unit attention */ 3690 delay_override = 1; 3691 errsts = resp_inquiry(SCpnt, target, devip); 3692 break; 3693 case REQUEST_SENSE: /* mandatory, ignore unit attention */ 3694 delay_override = 1; 3695 errsts = resp_requests(SCpnt, devip); 3696 break; 3697 case REZERO_UNIT: /* actually this is REWIND for SSC */ 3698 case START_STOP: 3699 errsts = resp_start_stop(SCpnt, devip); 3700 break; 3701 case ALLOW_MEDIUM_REMOVAL: 3702 errsts = check_readiness(SCpnt, 1, devip); 3703 if (errsts) 3704 break; 3705 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 3706 printk(KERN_INFO "scsi_debug: Medium removal %s\n", 3707 cmd[4] ? "inhibited" : "enabled"); 3708 break; 3709 case SEND_DIAGNOSTIC: /* mandatory */ 3710 errsts = check_readiness(SCpnt, 1, devip); 3711 break; 3712 case TEST_UNIT_READY: /* mandatory */ 3713 delay_override = 1; 3714 errsts = check_readiness(SCpnt, 0, devip); 3715 break; 3716 case RESERVE: 3717 errsts = check_readiness(SCpnt, 1, devip); 3718 break; 3719 case RESERVE_10: 3720 errsts = check_readiness(SCpnt, 1, devip); 3721 break; 3722 case RELEASE: 3723 errsts = check_readiness(SCpnt, 1, devip); 3724 break; 3725 case RELEASE_10: 3726 errsts = check_readiness(SCpnt, 1, devip); 3727 break; 3728 case READ_CAPACITY: 3729 errsts = resp_readcap(SCpnt, devip); 3730 break; 3731 case SERVICE_ACTION_IN: 3732 if (cmd[1] == SAI_READ_CAPACITY_16) 3733 errsts = resp_readcap16(SCpnt, devip); 3734 else if (cmd[1] == SAI_GET_LBA_STATUS) { 3735 3736 if (scsi_debug_lbp() == 0) { 3737 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3738 INVALID_COMMAND_OPCODE, 0); 3739 errsts = check_condition_result; 3740 } else 3741 errsts = resp_get_lba_status(SCpnt, devip); 3742 } else { 3743 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3744 INVALID_OPCODE, 0); 3745 errsts = check_condition_result; 3746 } 3747 break; 3748 case MAINTENANCE_IN: 3749 if (MI_REPORT_TARGET_PGS != cmd[1]) { 3750 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3751 INVALID_OPCODE, 0); 3752 errsts = check_condition_result; 3753 break; 3754 } 3755 errsts = resp_report_tgtpgs(SCpnt, devip); 3756 break; 3757 case READ_16: 3758 case READ_12: 3759 case READ_10: 3760 /* READ{10,12,16} and DIF Type 2 are natural enemies */ 3761 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && 3762 cmd[1] & 0xe0) { 3763 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3764 INVALID_COMMAND_OPCODE, 0); 3765 errsts = check_condition_result; 3766 break; 3767 } 3768 3769 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION || 3770 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) && 3771 (cmd[1] & 0xe0) == 0) 3772 printk(KERN_ERR "Unprotected RD/WR to DIF device\n"); 3773 3774 /* fall through */ 3775 case READ_6: 3776read: 3777 errsts = check_readiness(SCpnt, 0, devip); 3778 if (errsts) 3779 break; 3780 if (scsi_debug_fake_rw) 3781 break; 3782 get_data_transfer_info(cmd, &lba, &num, &ei_lba); 3783 errsts = resp_read(SCpnt, lba, num, devip, ei_lba); 3784 if (inj_recovered && (0 == errsts)) { 3785 mk_sense_buffer(devip, RECOVERED_ERROR, 3786 THRESHOLD_EXCEEDED, 0); 3787 errsts = check_condition_result; 3788 } else if (inj_transport && (0 == errsts)) { 3789 mk_sense_buffer(devip, ABORTED_COMMAND, 3790 TRANSPORT_PROBLEM, ACK_NAK_TO); 3791 errsts = check_condition_result; 3792 } else if (inj_dif && (0 == errsts)) { 3793 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1); 3794 errsts = illegal_condition_result; 3795 } else if (inj_dix && (0 == errsts)) { 3796 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1); 3797 errsts = illegal_condition_result; 3798 } 3799 break; 3800 case REPORT_LUNS: /* mandatory, ignore unit attention */ 3801 delay_override = 1; 3802 errsts = resp_report_luns(SCpnt, devip); 3803 break; 3804 case VERIFY: /* 10 byte SBC-2 command */ 3805 errsts = check_readiness(SCpnt, 0, devip); 3806 break; 3807 case WRITE_16: 3808 case WRITE_12: 3809 case WRITE_10: 3810 /* WRITE{10,12,16} and DIF Type 2 are natural enemies */ 3811 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && 3812 cmd[1] & 0xe0) { 3813 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3814 INVALID_COMMAND_OPCODE, 0); 3815 errsts = check_condition_result; 3816 break; 3817 } 3818 3819 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION || 3820 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) && 3821 (cmd[1] & 0xe0) == 0) 3822 printk(KERN_ERR "Unprotected RD/WR to DIF device\n"); 3823 3824 /* fall through */ 3825 case WRITE_6: 3826write: 3827 errsts = check_readiness(SCpnt, 0, devip); 3828 if (errsts) 3829 break; 3830 if (scsi_debug_fake_rw) 3831 break; 3832 get_data_transfer_info(cmd, &lba, &num, &ei_lba); 3833 errsts = resp_write(SCpnt, lba, num, devip, ei_lba); 3834 if (inj_recovered && (0 == errsts)) { 3835 mk_sense_buffer(devip, RECOVERED_ERROR, 3836 THRESHOLD_EXCEEDED, 0); 3837 errsts = check_condition_result; 3838 } else if (inj_dif && (0 == errsts)) { 3839 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1); 3840 errsts = illegal_condition_result; 3841 } else if (inj_dix && (0 == errsts)) { 3842 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1); 3843 errsts = illegal_condition_result; 3844 } 3845 break; 3846 case WRITE_SAME_16: 3847 case WRITE_SAME: 3848 if (cmd[1] & 0x8) { 3849 if ((*cmd == WRITE_SAME_16 && scsi_debug_lbpws == 0) || 3850 (*cmd == WRITE_SAME && scsi_debug_lbpws10 == 0)) { 3851 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3852 INVALID_FIELD_IN_CDB, 0); 3853 errsts = check_condition_result; 3854 } else 3855 unmap = 1; 3856 } 3857 if (errsts) 3858 break; 3859 errsts = check_readiness(SCpnt, 0, devip); 3860 if (errsts) 3861 break; 3862 get_data_transfer_info(cmd, &lba, &num, &ei_lba); 3863 errsts = resp_write_same(SCpnt, lba, num, devip, ei_lba, unmap); 3864 break; 3865 case UNMAP: 3866 errsts = check_readiness(SCpnt, 0, devip); 3867 if (errsts) 3868 break; 3869 3870 if (scsi_debug_unmap_max_desc == 0 || scsi_debug_lbpu == 0) { 3871 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3872 INVALID_COMMAND_OPCODE, 0); 3873 errsts = check_condition_result; 3874 } else 3875 errsts = resp_unmap(SCpnt, devip); 3876 break; 3877 case MODE_SENSE: 3878 case MODE_SENSE_10: 3879 errsts = resp_mode_sense(SCpnt, target, devip); 3880 break; 3881 case MODE_SELECT: 3882 errsts = resp_mode_select(SCpnt, 1, devip); 3883 break; 3884 case MODE_SELECT_10: 3885 errsts = resp_mode_select(SCpnt, 0, devip); 3886 break; 3887 case LOG_SENSE: 3888 errsts = resp_log_sense(SCpnt, devip); 3889 break; 3890 case SYNCHRONIZE_CACHE: 3891 delay_override = 1; 3892 errsts = check_readiness(SCpnt, 0, devip); 3893 break; 3894 case WRITE_BUFFER: 3895 errsts = check_readiness(SCpnt, 1, devip); 3896 break; 3897 case XDWRITEREAD_10: 3898 if (!scsi_bidi_cmnd(SCpnt)) { 3899 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3900 INVALID_FIELD_IN_CDB, 0); 3901 errsts = check_condition_result; 3902 break; 3903 } 3904 3905 errsts = check_readiness(SCpnt, 0, devip); 3906 if (errsts) 3907 break; 3908 if (scsi_debug_fake_rw) 3909 break; 3910 get_data_transfer_info(cmd, &lba, &num, &ei_lba); 3911 errsts = resp_read(SCpnt, lba, num, devip, ei_lba); 3912 if (errsts) 3913 break; 3914 errsts = resp_write(SCpnt, lba, num, devip, ei_lba); 3915 if (errsts) 3916 break; 3917 errsts = resp_xdwriteread(SCpnt, lba, num, devip); 3918 break; 3919 case VARIABLE_LENGTH_CMD: 3920 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION) { 3921 3922 if ((cmd[10] & 0xe0) == 0) 3923 printk(KERN_ERR 3924 "Unprotected RD/WR to DIF device\n"); 3925 3926 if (cmd[9] == READ_32) { 3927 BUG_ON(SCpnt->cmd_len < 32); 3928 goto read; 3929 } 3930 3931 if (cmd[9] == WRITE_32) { 3932 BUG_ON(SCpnt->cmd_len < 32); 3933 goto write; 3934 } 3935 } 3936 3937 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3938 INVALID_FIELD_IN_CDB, 0); 3939 errsts = check_condition_result; 3940 break; 3941 3942 default: 3943 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 3944 printk(KERN_INFO "scsi_debug: Opcode: 0x%x not " 3945 "supported\n", *cmd); 3946 errsts = check_readiness(SCpnt, 1, devip); 3947 if (errsts) 3948 break; /* Unit attention takes precedence */ 3949 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0); 3950 errsts = check_condition_result; 3951 break; 3952 } 3953 return schedule_resp(SCpnt, devip, done, errsts, 3954 (delay_override ? 0 : scsi_debug_delay)); 3955} 3956 3957static DEF_SCSI_QCMD(scsi_debug_queuecommand) 3958 3959static struct scsi_host_template sdebug_driver_template = { 3960 .proc_info = scsi_debug_proc_info, 3961 .proc_name = sdebug_proc_name, 3962 .name = "SCSI DEBUG", 3963 .info = scsi_debug_info, 3964 .slave_alloc = scsi_debug_slave_alloc, 3965 .slave_configure = scsi_debug_slave_configure, 3966 .slave_destroy = scsi_debug_slave_destroy, 3967 .ioctl = scsi_debug_ioctl, 3968 .queuecommand = scsi_debug_queuecommand, 3969 .eh_abort_handler = scsi_debug_abort, 3970 .eh_bus_reset_handler = scsi_debug_bus_reset, 3971 .eh_device_reset_handler = scsi_debug_device_reset, 3972 .eh_host_reset_handler = scsi_debug_host_reset, 3973 .bios_param = scsi_debug_biosparam, 3974 .can_queue = SCSI_DEBUG_CANQUEUE, 3975 .this_id = 7, 3976 .sg_tablesize = 256, 3977 .cmd_per_lun = 16, 3978 .max_sectors = 0xffff, 3979 .use_clustering = DISABLE_CLUSTERING, 3980 .module = THIS_MODULE, 3981}; 3982 3983static int sdebug_driver_probe(struct device * dev) 3984{ 3985 int error = 0; 3986 struct sdebug_host_info *sdbg_host; 3987 struct Scsi_Host *hpnt; 3988 int host_prot; 3989 3990 sdbg_host = to_sdebug_host(dev); 3991 3992 sdebug_driver_template.can_queue = scsi_debug_max_queue; 3993 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host)); 3994 if (NULL == hpnt) { 3995 printk(KERN_ERR "%s: scsi_register failed\n", __func__); 3996 error = -ENODEV; 3997 return error; 3998 } 3999 4000 sdbg_host->shost = hpnt; 4001 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host; 4002 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id)) 4003 hpnt->max_id = scsi_debug_num_tgts + 1; 4004 else 4005 hpnt->max_id = scsi_debug_num_tgts; 4006 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */ 4007 4008 host_prot = 0; 4009 4010 switch (scsi_debug_dif) { 4011 4012 case SD_DIF_TYPE1_PROTECTION: 4013 host_prot = SHOST_DIF_TYPE1_PROTECTION; 4014 if (scsi_debug_dix) 4015 host_prot |= SHOST_DIX_TYPE1_PROTECTION; 4016 break; 4017 4018 case SD_DIF_TYPE2_PROTECTION: 4019 host_prot = SHOST_DIF_TYPE2_PROTECTION; 4020 if (scsi_debug_dix) 4021 host_prot |= SHOST_DIX_TYPE2_PROTECTION; 4022 break; 4023 4024 case SD_DIF_TYPE3_PROTECTION: 4025 host_prot = SHOST_DIF_TYPE3_PROTECTION; 4026 if (scsi_debug_dix) 4027 host_prot |= SHOST_DIX_TYPE3_PROTECTION; 4028 break; 4029 4030 default: 4031 if (scsi_debug_dix) 4032 host_prot |= SHOST_DIX_TYPE0_PROTECTION; 4033 break; 4034 } 4035 4036 scsi_host_set_prot(hpnt, host_prot); 4037 4038 printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n", 4039 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "", 4040 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "", 4041 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "", 4042 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "", 4043 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "", 4044 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "", 4045 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : ""); 4046 4047 if (scsi_debug_guard == 1) 4048 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP); 4049 else 4050 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC); 4051 4052 error = scsi_add_host(hpnt, &sdbg_host->dev); 4053 if (error) { 4054 printk(KERN_ERR "%s: scsi_add_host failed\n", __func__); 4055 error = -ENODEV; 4056 scsi_host_put(hpnt); 4057 } else 4058 scsi_scan_host(hpnt); 4059 4060 4061 return error; 4062} 4063 4064static int sdebug_driver_remove(struct device * dev) 4065{ 4066 struct sdebug_host_info *sdbg_host; 4067 struct sdebug_dev_info *sdbg_devinfo, *tmp; 4068 4069 sdbg_host = to_sdebug_host(dev); 4070 4071 if (!sdbg_host) { 4072 printk(KERN_ERR "%s: Unable to locate host info\n", 4073 __func__); 4074 return -ENODEV; 4075 } 4076 4077 scsi_remove_host(sdbg_host->shost); 4078 4079 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list, 4080 dev_list) { 4081 list_del(&sdbg_devinfo->dev_list); 4082 kfree(sdbg_devinfo); 4083 } 4084 4085 scsi_host_put(sdbg_host->shost); 4086 return 0; 4087} 4088 4089static int pseudo_lld_bus_match(struct device *dev, 4090 struct device_driver *dev_driver) 4091{ 4092 return 1; 4093} 4094 4095static struct bus_type pseudo_lld_bus = { 4096 .name = "pseudo", 4097 .match = pseudo_lld_bus_match, 4098 .probe = sdebug_driver_probe, 4099 .remove = sdebug_driver_remove, 4100}; 4101