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" 62 static 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 255 162 163 static int scsi_debug_add_host = DEF_NUM_HOST; 164 static int scsi_debug_ato = DEF_ATO; 165 static int scsi_debug_delay = DEF_DELAY; 166 static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB; 167 static int scsi_debug_dif = DEF_DIF; 168 static int scsi_debug_dix = DEF_DIX; 169 static int scsi_debug_dsense = DEF_D_SENSE; 170 static int scsi_debug_every_nth = DEF_EVERY_NTH; 171 static int scsi_debug_fake_rw = DEF_FAKE_RW; 172 static int scsi_debug_guard = DEF_GUARD; 173 static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED; 174 static int scsi_debug_max_luns = DEF_MAX_LUNS; 175 static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE; 176 static int scsi_debug_no_lun_0 = DEF_NO_LUN_0; 177 static int scsi_debug_no_uld = 0; 178 static int scsi_debug_num_parts = DEF_NUM_PARTS; 179 static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */ 180 static int scsi_debug_opt_blks = DEF_OPT_BLKS; 181 static int scsi_debug_opts = DEF_OPTS; 182 static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP; 183 static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */ 184 static int scsi_debug_scsi_level = DEF_SCSI_LEVEL; 185 static int scsi_debug_sector_size = DEF_SECTOR_SIZE; 186 static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB; 187 static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO; 188 static unsigned int scsi_debug_lbpu = DEF_LBPU; 189 static unsigned int scsi_debug_lbpws = DEF_LBPWS; 190 static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10; 191 static unsigned int scsi_debug_lbprz = DEF_LBPRZ; 192 static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT; 193 static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY; 194 static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS; 195 static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC; 196 static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH; 197 static bool scsi_debug_removable = DEF_REMOVABLE; 198 199 static int scsi_debug_cmnd_count = 0; 200 201 #define DEV_READONLY(TGT) (0) 202 203 static unsigned int sdebug_store_sectors; 204 static 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 */ 208 static int sdebug_heads; /* heads per disk */ 209 static int sdebug_cylinders_per; /* cylinders per surface */ 210 static 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 32 217 218 static unsigned int scsi_debug_lbp(void) 219 { 220 return scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10; 221 } 222 223 struct 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 }; 235 236 struct 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) 245 246 static LIST_HEAD(sdebug_host_list); 247 static DEFINE_SPINLOCK(sdebug_host_list_lock); 248 249 typedef void (* done_funct_t) (struct scsi_cmnd *); 250 251 struct 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 }; 258 static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE]; 259 260 static unsigned char * fake_storep; /* ramdisk storage */ 261 static unsigned char *dif_storep; /* protection info */ 262 static void *map_storep; /* provisioning map */ 263 264 static unsigned long map_size; 265 static int num_aborts = 0; 266 static int num_dev_resets = 0; 267 static int num_bus_resets = 0; 268 static int num_host_resets = 0; 269 static int dix_writes; 270 static int dix_reads; 271 static int dif_errors; 272 273 static DEFINE_SPINLOCK(queued_arr_lock); 274 static DEFINE_RWLOCK(atomic_rw); 275 276 static char sdebug_proc_name[] = "scsi_debug"; 277 278 static struct bus_type pseudo_lld_bus; 279 280 static inline sector_t dif_offset(sector_t sector) 281 { 282 return sector << 3; 283 } 284 285 static struct device_driver sdebug_driverfs_driver = { 286 .name = sdebug_proc_name, 287 .bus = &pseudo_lld_bus, 288 }; 289 290 static const int check_condition_result = 291 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 292 293 static const int illegal_condition_result = 294 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION; 295 296 static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, 297 0, 0, 0x2, 0x4b}; 298 static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, 299 0, 0, 0x0, 0x0}; 300 301 static int sdebug_add_adapter(void); 302 static void sdebug_remove_adapter(void); 303 304 static 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 } 322 323 static 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 } 337 338 static 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 } 396 397 static 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 } 405 406 static 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 . */ 429 static 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 sdb->resid = scsi_bufflen(scp) - act_len; 443 444 return 0; 445 } 446 447 /* Returns number of bytes fetched into 'arr' or -1 if error. */ 448 static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr, 449 int arr_len) 450 { 451 if (!scsi_bufflen(scp)) 452 return 0; 453 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE)) 454 return -1; 455 456 return scsi_sg_copy_to_buffer(scp, arr, arr_len); 457 } 458 459 460 static const char * inq_vendor_id = "Linux "; 461 static const char * inq_product_id = "scsi_debug "; 462 static const char * inq_product_rev = "0004"; 463 464 static int inquiry_evpd_83(unsigned char * arr, int port_group_id, 465 int target_dev_id, int dev_id_num, 466 const char * dev_id_str, 467 int dev_id_str_len) 468 { 469 int num, port_a; 470 char b[32]; 471 472 port_a = target_dev_id + 1; 473 /* T10 vendor identifier field format (faked) */ 474 arr[0] = 0x2; /* ASCII */ 475 arr[1] = 0x1; 476 arr[2] = 0x0; 477 memcpy(&arr[4], inq_vendor_id, 8); 478 memcpy(&arr[12], inq_product_id, 16); 479 memcpy(&arr[28], dev_id_str, dev_id_str_len); 480 num = 8 + 16 + dev_id_str_len; 481 arr[3] = num; 482 num += 4; 483 if (dev_id_num >= 0) { 484 /* NAA-5, Logical unit identifier (binary) */ 485 arr[num++] = 0x1; /* binary (not necessarily sas) */ 486 arr[num++] = 0x3; /* PIV=0, lu, naa */ 487 arr[num++] = 0x0; 488 arr[num++] = 0x8; 489 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */ 490 arr[num++] = 0x33; 491 arr[num++] = 0x33; 492 arr[num++] = 0x30; 493 arr[num++] = (dev_id_num >> 24); 494 arr[num++] = (dev_id_num >> 16) & 0xff; 495 arr[num++] = (dev_id_num >> 8) & 0xff; 496 arr[num++] = dev_id_num & 0xff; 497 /* Target relative port number */ 498 arr[num++] = 0x61; /* proto=sas, binary */ 499 arr[num++] = 0x94; /* PIV=1, target port, rel port */ 500 arr[num++] = 0x0; /* reserved */ 501 arr[num++] = 0x4; /* length */ 502 arr[num++] = 0x0; /* reserved */ 503 arr[num++] = 0x0; /* reserved */ 504 arr[num++] = 0x0; 505 arr[num++] = 0x1; /* relative port A */ 506 } 507 /* NAA-5, Target port identifier */ 508 arr[num++] = 0x61; /* proto=sas, binary */ 509 arr[num++] = 0x93; /* piv=1, target port, naa */ 510 arr[num++] = 0x0; 511 arr[num++] = 0x8; 512 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */ 513 arr[num++] = 0x22; 514 arr[num++] = 0x22; 515 arr[num++] = 0x20; 516 arr[num++] = (port_a >> 24); 517 arr[num++] = (port_a >> 16) & 0xff; 518 arr[num++] = (port_a >> 8) & 0xff; 519 arr[num++] = port_a & 0xff; 520 /* NAA-5, Target port group identifier */ 521 arr[num++] = 0x61; /* proto=sas, binary */ 522 arr[num++] = 0x95; /* piv=1, target port group id */ 523 arr[num++] = 0x0; 524 arr[num++] = 0x4; 525 arr[num++] = 0; 526 arr[num++] = 0; 527 arr[num++] = (port_group_id >> 8) & 0xff; 528 arr[num++] = port_group_id & 0xff; 529 /* NAA-5, Target device identifier */ 530 arr[num++] = 0x61; /* proto=sas, binary */ 531 arr[num++] = 0xa3; /* piv=1, target device, naa */ 532 arr[num++] = 0x0; 533 arr[num++] = 0x8; 534 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */ 535 arr[num++] = 0x22; 536 arr[num++] = 0x22; 537 arr[num++] = 0x20; 538 arr[num++] = (target_dev_id >> 24); 539 arr[num++] = (target_dev_id >> 16) & 0xff; 540 arr[num++] = (target_dev_id >> 8) & 0xff; 541 arr[num++] = target_dev_id & 0xff; 542 /* SCSI name string: Target device identifier */ 543 arr[num++] = 0x63; /* proto=sas, UTF-8 */ 544 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */ 545 arr[num++] = 0x0; 546 arr[num++] = 24; 547 memcpy(arr + num, "naa.52222220", 12); 548 num += 12; 549 snprintf(b, sizeof(b), "%08X", target_dev_id); 550 memcpy(arr + num, b, 8); 551 num += 8; 552 memset(arr + num, 0, 4); 553 num += 4; 554 return num; 555 } 556 557 558 static unsigned char vpd84_data[] = { 559 /* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0, 560 0x22,0x22,0x22,0x0,0xbb,0x1, 561 0x22,0x22,0x22,0x0,0xbb,0x2, 562 }; 563 564 static int inquiry_evpd_84(unsigned char * arr) 565 { 566 memcpy(arr, vpd84_data, sizeof(vpd84_data)); 567 return sizeof(vpd84_data); 568 } 569 570 static int inquiry_evpd_85(unsigned char * arr) 571 { 572 int num = 0; 573 const char * na1 = "https://www.kernel.org/config"; 574 const char * na2 = "http://www.kernel.org/log"; 575 int plen, olen; 576 577 arr[num++] = 0x1; /* lu, storage config */ 578 arr[num++] = 0x0; /* reserved */ 579 arr[num++] = 0x0; 580 olen = strlen(na1); 581 plen = olen + 1; 582 if (plen % 4) 583 plen = ((plen / 4) + 1) * 4; 584 arr[num++] = plen; /* length, null termianted, padded */ 585 memcpy(arr + num, na1, olen); 586 memset(arr + num + olen, 0, plen - olen); 587 num += plen; 588 589 arr[num++] = 0x4; /* lu, logging */ 590 arr[num++] = 0x0; /* reserved */ 591 arr[num++] = 0x0; 592 olen = strlen(na2); 593 plen = olen + 1; 594 if (plen % 4) 595 plen = ((plen / 4) + 1) * 4; 596 arr[num++] = plen; /* length, null terminated, padded */ 597 memcpy(arr + num, na2, olen); 598 memset(arr + num + olen, 0, plen - olen); 599 num += plen; 600 601 return num; 602 } 603 604 /* SCSI ports VPD page */ 605 static int inquiry_evpd_88(unsigned char * arr, int target_dev_id) 606 { 607 int num = 0; 608 int port_a, port_b; 609 610 port_a = target_dev_id + 1; 611 port_b = port_a + 1; 612 arr[num++] = 0x0; /* reserved */ 613 arr[num++] = 0x0; /* reserved */ 614 arr[num++] = 0x0; 615 arr[num++] = 0x1; /* relative port 1 (primary) */ 616 memset(arr + num, 0, 6); 617 num += 6; 618 arr[num++] = 0x0; 619 arr[num++] = 12; /* length tp descriptor */ 620 /* naa-5 target port identifier (A) */ 621 arr[num++] = 0x61; /* proto=sas, binary */ 622 arr[num++] = 0x93; /* PIV=1, target port, NAA */ 623 arr[num++] = 0x0; /* reserved */ 624 arr[num++] = 0x8; /* length */ 625 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */ 626 arr[num++] = 0x22; 627 arr[num++] = 0x22; 628 arr[num++] = 0x20; 629 arr[num++] = (port_a >> 24); 630 arr[num++] = (port_a >> 16) & 0xff; 631 arr[num++] = (port_a >> 8) & 0xff; 632 arr[num++] = port_a & 0xff; 633 634 arr[num++] = 0x0; /* reserved */ 635 arr[num++] = 0x0; /* reserved */ 636 arr[num++] = 0x0; 637 arr[num++] = 0x2; /* relative port 2 (secondary) */ 638 memset(arr + num, 0, 6); 639 num += 6; 640 arr[num++] = 0x0; 641 arr[num++] = 12; /* length tp descriptor */ 642 /* naa-5 target port identifier (B) */ 643 arr[num++] = 0x61; /* proto=sas, binary */ 644 arr[num++] = 0x93; /* PIV=1, target port, NAA */ 645 arr[num++] = 0x0; /* reserved */ 646 arr[num++] = 0x8; /* length */ 647 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */ 648 arr[num++] = 0x22; 649 arr[num++] = 0x22; 650 arr[num++] = 0x20; 651 arr[num++] = (port_b >> 24); 652 arr[num++] = (port_b >> 16) & 0xff; 653 arr[num++] = (port_b >> 8) & 0xff; 654 arr[num++] = port_b & 0xff; 655 656 return num; 657 } 658 659 660 static unsigned char vpd89_data[] = { 661 /* from 4th byte */ 0,0,0,0, 662 'l','i','n','u','x',' ',' ',' ', 663 'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ', 664 '1','2','3','4', 665 0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0, 666 0xec,0,0,0, 667 0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0, 668 0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20, 669 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33, 670 0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31, 671 0x53,0x41, 672 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 673 0x20,0x20, 674 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 675 0x10,0x80, 676 0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0, 677 0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0, 678 0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0, 679 0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0, 680 0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40, 681 0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0, 682 0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0, 683 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 684 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 685 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 686 0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42, 687 0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8, 688 0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe, 689 0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0, 690 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 691 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 692 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 693 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 694 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 695 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 696 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 697 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 698 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 699 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 700 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 701 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51, 702 }; 703 704 static int inquiry_evpd_89(unsigned char * arr) 705 { 706 memcpy(arr, vpd89_data, sizeof(vpd89_data)); 707 return sizeof(vpd89_data); 708 } 709 710 711 /* Block limits VPD page (SBC-3) */ 712 static unsigned char vpdb0_data[] = { 713 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64, 714 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 715 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 716 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 717 }; 718 719 static int inquiry_evpd_b0(unsigned char * arr) 720 { 721 unsigned int gran; 722 723 memcpy(arr, vpdb0_data, sizeof(vpdb0_data)); 724 725 /* Optimal transfer length granularity */ 726 gran = 1 << scsi_debug_physblk_exp; 727 arr[2] = (gran >> 8) & 0xff; 728 arr[3] = gran & 0xff; 729 730 /* Maximum Transfer Length */ 731 if (sdebug_store_sectors > 0x400) { 732 arr[4] = (sdebug_store_sectors >> 24) & 0xff; 733 arr[5] = (sdebug_store_sectors >> 16) & 0xff; 734 arr[6] = (sdebug_store_sectors >> 8) & 0xff; 735 arr[7] = sdebug_store_sectors & 0xff; 736 } 737 738 /* Optimal Transfer Length */ 739 put_unaligned_be32(scsi_debug_opt_blks, &arr[8]); 740 741 if (scsi_debug_lbpu) { 742 /* Maximum Unmap LBA Count */ 743 put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]); 744 745 /* Maximum Unmap Block Descriptor Count */ 746 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]); 747 } 748 749 /* Unmap Granularity Alignment */ 750 if (scsi_debug_unmap_alignment) { 751 put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]); 752 arr[28] |= 0x80; /* UGAVALID */ 753 } 754 755 /* Optimal Unmap Granularity */ 756 put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]); 757 758 /* Maximum WRITE SAME Length */ 759 put_unaligned_be64(scsi_debug_write_same_length, &arr[32]); 760 761 return 0x3c; /* Mandatory page length for Logical Block Provisioning */ 762 763 return sizeof(vpdb0_data); 764 } 765 766 /* Block device characteristics VPD page (SBC-3) */ 767 static int inquiry_evpd_b1(unsigned char *arr) 768 { 769 memset(arr, 0, 0x3c); 770 arr[0] = 0; 771 arr[1] = 1; /* non rotating medium (e.g. solid state) */ 772 arr[2] = 0; 773 arr[3] = 5; /* less than 1.8" */ 774 775 return 0x3c; 776 } 777 778 /* Logical block provisioning VPD page (SBC-3) */ 779 static int inquiry_evpd_b2(unsigned char *arr) 780 { 781 memset(arr, 0, 0x4); 782 arr[0] = 0; /* threshold exponent */ 783 784 if (scsi_debug_lbpu) 785 arr[1] = 1 << 7; 786 787 if (scsi_debug_lbpws) 788 arr[1] |= 1 << 6; 789 790 if (scsi_debug_lbpws10) 791 arr[1] |= 1 << 5; 792 793 if (scsi_debug_lbprz) 794 arr[1] |= 1 << 2; 795 796 return 0x4; 797 } 798 799 #define SDEBUG_LONG_INQ_SZ 96 800 #define SDEBUG_MAX_INQ_ARR_SZ 584 801 802 static int resp_inquiry(struct scsi_cmnd * scp, int target, 803 struct sdebug_dev_info * devip) 804 { 805 unsigned char pq_pdt; 806 unsigned char * arr; 807 unsigned char *cmd = (unsigned char *)scp->cmnd; 808 int alloc_len, n, ret; 809 810 alloc_len = (cmd[3] << 8) + cmd[4]; 811 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC); 812 if (! arr) 813 return DID_REQUEUE << 16; 814 if (devip->wlun) 815 pq_pdt = 0x1e; /* present, wlun */ 816 else if (scsi_debug_no_lun_0 && (0 == devip->lun)) 817 pq_pdt = 0x7f; /* not present, no device type */ 818 else 819 pq_pdt = (scsi_debug_ptype & 0x1f); 820 arr[0] = pq_pdt; 821 if (0x2 & cmd[1]) { /* CMDDT bit set */ 822 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 823 0); 824 kfree(arr); 825 return check_condition_result; 826 } else if (0x1 & cmd[1]) { /* EVPD bit set */ 827 int lu_id_num, port_group_id, target_dev_id, len; 828 char lu_id_str[6]; 829 int host_no = devip->sdbg_host->shost->host_no; 830 831 port_group_id = (((host_no + 1) & 0x7f) << 8) + 832 (devip->channel & 0x7f); 833 if (0 == scsi_debug_vpd_use_hostno) 834 host_no = 0; 835 lu_id_num = devip->wlun ? -1 : (((host_no + 1) * 2000) + 836 (devip->target * 1000) + devip->lun); 837 target_dev_id = ((host_no + 1) * 2000) + 838 (devip->target * 1000) - 3; 839 len = scnprintf(lu_id_str, 6, "%d", lu_id_num); 840 if (0 == cmd[2]) { /* supported vital product data pages */ 841 arr[1] = cmd[2]; /*sanity */ 842 n = 4; 843 arr[n++] = 0x0; /* this page */ 844 arr[n++] = 0x80; /* unit serial number */ 845 arr[n++] = 0x83; /* device identification */ 846 arr[n++] = 0x84; /* software interface ident. */ 847 arr[n++] = 0x85; /* management network addresses */ 848 arr[n++] = 0x86; /* extended inquiry */ 849 arr[n++] = 0x87; /* mode page policy */ 850 arr[n++] = 0x88; /* SCSI ports */ 851 arr[n++] = 0x89; /* ATA information */ 852 arr[n++] = 0xb0; /* Block limits (SBC) */ 853 arr[n++] = 0xb1; /* Block characteristics (SBC) */ 854 if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */ 855 arr[n++] = 0xb2; 856 arr[3] = n - 4; /* number of supported VPD pages */ 857 } else if (0x80 == cmd[2]) { /* unit serial number */ 858 arr[1] = cmd[2]; /*sanity */ 859 arr[3] = len; 860 memcpy(&arr[4], lu_id_str, len); 861 } else if (0x83 == cmd[2]) { /* device identification */ 862 arr[1] = cmd[2]; /*sanity */ 863 arr[3] = inquiry_evpd_83(&arr[4], port_group_id, 864 target_dev_id, lu_id_num, 865 lu_id_str, len); 866 } else if (0x84 == cmd[2]) { /* Software interface ident. */ 867 arr[1] = cmd[2]; /*sanity */ 868 arr[3] = inquiry_evpd_84(&arr[4]); 869 } else if (0x85 == cmd[2]) { /* Management network addresses */ 870 arr[1] = cmd[2]; /*sanity */ 871 arr[3] = inquiry_evpd_85(&arr[4]); 872 } else if (0x86 == cmd[2]) { /* extended inquiry */ 873 arr[1] = cmd[2]; /*sanity */ 874 arr[3] = 0x3c; /* number of following entries */ 875 if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) 876 arr[4] = 0x4; /* SPT: GRD_CHK:1 */ 877 else if (scsi_debug_dif) 878 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */ 879 else 880 arr[4] = 0x0; /* no protection stuff */ 881 arr[5] = 0x7; /* head of q, ordered + simple q's */ 882 } else if (0x87 == cmd[2]) { /* mode page policy */ 883 arr[1] = cmd[2]; /*sanity */ 884 arr[3] = 0x8; /* number of following entries */ 885 arr[4] = 0x2; /* disconnect-reconnect mp */ 886 arr[6] = 0x80; /* mlus, shared */ 887 arr[8] = 0x18; /* protocol specific lu */ 888 arr[10] = 0x82; /* mlus, per initiator port */ 889 } else if (0x88 == cmd[2]) { /* SCSI Ports */ 890 arr[1] = cmd[2]; /*sanity */ 891 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id); 892 } else if (0x89 == cmd[2]) { /* ATA information */ 893 arr[1] = cmd[2]; /*sanity */ 894 n = inquiry_evpd_89(&arr[4]); 895 arr[2] = (n >> 8); 896 arr[3] = (n & 0xff); 897 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */ 898 arr[1] = cmd[2]; /*sanity */ 899 arr[3] = inquiry_evpd_b0(&arr[4]); 900 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */ 901 arr[1] = cmd[2]; /*sanity */ 902 arr[3] = inquiry_evpd_b1(&arr[4]); 903 } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */ 904 arr[1] = cmd[2]; /*sanity */ 905 arr[3] = inquiry_evpd_b2(&arr[4]); 906 } else { 907 /* Illegal request, invalid field in cdb */ 908 mk_sense_buffer(devip, ILLEGAL_REQUEST, 909 INVALID_FIELD_IN_CDB, 0); 910 kfree(arr); 911 return check_condition_result; 912 } 913 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len); 914 ret = fill_from_dev_buffer(scp, arr, 915 min(len, SDEBUG_MAX_INQ_ARR_SZ)); 916 kfree(arr); 917 return ret; 918 } 919 /* drops through here for a standard inquiry */ 920 arr[1] = scsi_debug_removable ? 0x80 : 0; /* Removable disk */ 921 arr[2] = scsi_debug_scsi_level; 922 arr[3] = 2; /* response_data_format==2 */ 923 arr[4] = SDEBUG_LONG_INQ_SZ - 5; 924 arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */ 925 if (0 == scsi_debug_vpd_use_hostno) 926 arr[5] = 0x10; /* claim: implicit TGPS */ 927 arr[6] = 0x10; /* claim: MultiP */ 928 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */ 929 arr[7] = 0xa; /* claim: LINKED + CMDQUE */ 930 memcpy(&arr[8], inq_vendor_id, 8); 931 memcpy(&arr[16], inq_product_id, 16); 932 memcpy(&arr[32], inq_product_rev, 4); 933 /* version descriptors (2 bytes each) follow */ 934 arr[58] = 0x0; arr[59] = 0x77; /* SAM-3 ANSI */ 935 arr[60] = 0x3; arr[61] = 0x14; /* SPC-3 ANSI */ 936 n = 62; 937 if (scsi_debug_ptype == 0) { 938 arr[n++] = 0x3; arr[n++] = 0x3d; /* SBC-2 ANSI */ 939 } else if (scsi_debug_ptype == 1) { 940 arr[n++] = 0x3; arr[n++] = 0x60; /* SSC-2 no version */ 941 } 942 arr[n++] = 0xc; arr[n++] = 0xf; /* SAS-1.1 rev 10 */ 943 ret = fill_from_dev_buffer(scp, arr, 944 min(alloc_len, SDEBUG_LONG_INQ_SZ)); 945 kfree(arr); 946 return ret; 947 } 948 949 static int resp_requests(struct scsi_cmnd * scp, 950 struct sdebug_dev_info * devip) 951 { 952 unsigned char * sbuff; 953 unsigned char *cmd = (unsigned char *)scp->cmnd; 954 unsigned char arr[SDEBUG_SENSE_LEN]; 955 int want_dsense; 956 int len = 18; 957 958 memset(arr, 0, sizeof(arr)); 959 if (devip->reset == 1) 960 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0); 961 want_dsense = !!(cmd[1] & 1) || scsi_debug_dsense; 962 sbuff = devip->sense_buff; 963 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) { 964 if (want_dsense) { 965 arr[0] = 0x72; 966 arr[1] = 0x0; /* NO_SENSE in sense_key */ 967 arr[2] = THRESHOLD_EXCEEDED; 968 arr[3] = 0xff; /* TEST set and MRIE==6 */ 969 } else { 970 arr[0] = 0x70; 971 arr[2] = 0x0; /* NO_SENSE in sense_key */ 972 arr[7] = 0xa; /* 18 byte sense buffer */ 973 arr[12] = THRESHOLD_EXCEEDED; 974 arr[13] = 0xff; /* TEST set and MRIE==6 */ 975 } 976 } else { 977 memcpy(arr, sbuff, SDEBUG_SENSE_LEN); 978 if ((cmd[1] & 1) && (! scsi_debug_dsense)) { 979 /* DESC bit set and sense_buff in fixed format */ 980 memset(arr, 0, sizeof(arr)); 981 arr[0] = 0x72; 982 arr[1] = sbuff[2]; /* sense key */ 983 arr[2] = sbuff[12]; /* asc */ 984 arr[3] = sbuff[13]; /* ascq */ 985 len = 8; 986 } 987 } 988 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0); 989 return fill_from_dev_buffer(scp, arr, len); 990 } 991 992 static int resp_start_stop(struct scsi_cmnd * scp, 993 struct sdebug_dev_info * devip) 994 { 995 unsigned char *cmd = (unsigned char *)scp->cmnd; 996 int power_cond, errsts, start; 997 998 if ((errsts = check_readiness(scp, 1, devip))) 999 return errsts; 1000 power_cond = (cmd[4] & 0xf0) >> 4; 1001 if (power_cond) { 1002 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 1003 0); 1004 return check_condition_result; 1005 } 1006 start = cmd[4] & 1; 1007 if (start == devip->stopped) 1008 devip->stopped = !start; 1009 return 0; 1010 } 1011 1012 static sector_t get_sdebug_capacity(void) 1013 { 1014 if (scsi_debug_virtual_gb > 0) 1015 return (sector_t)scsi_debug_virtual_gb * 1016 (1073741824 / scsi_debug_sector_size); 1017 else 1018 return sdebug_store_sectors; 1019 } 1020 1021 #define SDEBUG_READCAP_ARR_SZ 8 1022 static int resp_readcap(struct scsi_cmnd * scp, 1023 struct sdebug_dev_info * devip) 1024 { 1025 unsigned char arr[SDEBUG_READCAP_ARR_SZ]; 1026 unsigned int capac; 1027 int errsts; 1028 1029 if ((errsts = check_readiness(scp, 1, devip))) 1030 return errsts; 1031 /* following just in case virtual_gb changed */ 1032 sdebug_capacity = get_sdebug_capacity(); 1033 memset(arr, 0, SDEBUG_READCAP_ARR_SZ); 1034 if (sdebug_capacity < 0xffffffff) { 1035 capac = (unsigned int)sdebug_capacity - 1; 1036 arr[0] = (capac >> 24); 1037 arr[1] = (capac >> 16) & 0xff; 1038 arr[2] = (capac >> 8) & 0xff; 1039 arr[3] = capac & 0xff; 1040 } else { 1041 arr[0] = 0xff; 1042 arr[1] = 0xff; 1043 arr[2] = 0xff; 1044 arr[3] = 0xff; 1045 } 1046 arr[6] = (scsi_debug_sector_size >> 8) & 0xff; 1047 arr[7] = scsi_debug_sector_size & 0xff; 1048 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ); 1049 } 1050 1051 #define SDEBUG_READCAP16_ARR_SZ 32 1052 static int resp_readcap16(struct scsi_cmnd * scp, 1053 struct sdebug_dev_info * devip) 1054 { 1055 unsigned char *cmd = (unsigned char *)scp->cmnd; 1056 unsigned char arr[SDEBUG_READCAP16_ARR_SZ]; 1057 unsigned long long capac; 1058 int errsts, k, alloc_len; 1059 1060 if ((errsts = check_readiness(scp, 1, devip))) 1061 return errsts; 1062 alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8) 1063 + cmd[13]); 1064 /* following just in case virtual_gb changed */ 1065 sdebug_capacity = get_sdebug_capacity(); 1066 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ); 1067 capac = sdebug_capacity - 1; 1068 for (k = 0; k < 8; ++k, capac >>= 8) 1069 arr[7 - k] = capac & 0xff; 1070 arr[8] = (scsi_debug_sector_size >> 24) & 0xff; 1071 arr[9] = (scsi_debug_sector_size >> 16) & 0xff; 1072 arr[10] = (scsi_debug_sector_size >> 8) & 0xff; 1073 arr[11] = scsi_debug_sector_size & 0xff; 1074 arr[13] = scsi_debug_physblk_exp & 0xf; 1075 arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f; 1076 1077 if (scsi_debug_lbp()) { 1078 arr[14] |= 0x80; /* LBPME */ 1079 if (scsi_debug_lbprz) 1080 arr[14] |= 0x40; /* LBPRZ */ 1081 } 1082 1083 arr[15] = scsi_debug_lowest_aligned & 0xff; 1084 1085 if (scsi_debug_dif) { 1086 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */ 1087 arr[12] |= 1; /* PROT_EN */ 1088 } 1089 1090 return fill_from_dev_buffer(scp, arr, 1091 min(alloc_len, SDEBUG_READCAP16_ARR_SZ)); 1092 } 1093 1094 #define SDEBUG_MAX_TGTPGS_ARR_SZ 1412 1095 1096 static int resp_report_tgtpgs(struct scsi_cmnd * scp, 1097 struct sdebug_dev_info * devip) 1098 { 1099 unsigned char *cmd = (unsigned char *)scp->cmnd; 1100 unsigned char * arr; 1101 int host_no = devip->sdbg_host->shost->host_no; 1102 int n, ret, alen, rlen; 1103 int port_group_a, port_group_b, port_a, port_b; 1104 1105 alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8) 1106 + cmd[9]); 1107 1108 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC); 1109 if (! arr) 1110 return DID_REQUEUE << 16; 1111 /* 1112 * EVPD page 0x88 states we have two ports, one 1113 * real and a fake port with no device connected. 1114 * So we create two port groups with one port each 1115 * and set the group with port B to unavailable. 1116 */ 1117 port_a = 0x1; /* relative port A */ 1118 port_b = 0x2; /* relative port B */ 1119 port_group_a = (((host_no + 1) & 0x7f) << 8) + 1120 (devip->channel & 0x7f); 1121 port_group_b = (((host_no + 1) & 0x7f) << 8) + 1122 (devip->channel & 0x7f) + 0x80; 1123 1124 /* 1125 * The asymmetric access state is cycled according to the host_id. 1126 */ 1127 n = 4; 1128 if (0 == scsi_debug_vpd_use_hostno) { 1129 arr[n++] = host_no % 3; /* Asymm access state */ 1130 arr[n++] = 0x0F; /* claim: all states are supported */ 1131 } else { 1132 arr[n++] = 0x0; /* Active/Optimized path */ 1133 arr[n++] = 0x01; /* claim: only support active/optimized paths */ 1134 } 1135 arr[n++] = (port_group_a >> 8) & 0xff; 1136 arr[n++] = port_group_a & 0xff; 1137 arr[n++] = 0; /* Reserved */ 1138 arr[n++] = 0; /* Status code */ 1139 arr[n++] = 0; /* Vendor unique */ 1140 arr[n++] = 0x1; /* One port per group */ 1141 arr[n++] = 0; /* Reserved */ 1142 arr[n++] = 0; /* Reserved */ 1143 arr[n++] = (port_a >> 8) & 0xff; 1144 arr[n++] = port_a & 0xff; 1145 arr[n++] = 3; /* Port unavailable */ 1146 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */ 1147 arr[n++] = (port_group_b >> 8) & 0xff; 1148 arr[n++] = port_group_b & 0xff; 1149 arr[n++] = 0; /* Reserved */ 1150 arr[n++] = 0; /* Status code */ 1151 arr[n++] = 0; /* Vendor unique */ 1152 arr[n++] = 0x1; /* One port per group */ 1153 arr[n++] = 0; /* Reserved */ 1154 arr[n++] = 0; /* Reserved */ 1155 arr[n++] = (port_b >> 8) & 0xff; 1156 arr[n++] = port_b & 0xff; 1157 1158 rlen = n - 4; 1159 arr[0] = (rlen >> 24) & 0xff; 1160 arr[1] = (rlen >> 16) & 0xff; 1161 arr[2] = (rlen >> 8) & 0xff; 1162 arr[3] = rlen & 0xff; 1163 1164 /* 1165 * Return the smallest value of either 1166 * - The allocated length 1167 * - The constructed command length 1168 * - The maximum array size 1169 */ 1170 rlen = min(alen,n); 1171 ret = fill_from_dev_buffer(scp, arr, 1172 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ)); 1173 kfree(arr); 1174 return ret; 1175 } 1176 1177 /* <<Following mode page info copied from ST318451LW>> */ 1178 1179 static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target) 1180 { /* Read-Write Error Recovery page for mode_sense */ 1181 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0, 1182 5, 0, 0xff, 0xff}; 1183 1184 memcpy(p, err_recov_pg, sizeof(err_recov_pg)); 1185 if (1 == pcontrol) 1186 memset(p + 2, 0, sizeof(err_recov_pg) - 2); 1187 return sizeof(err_recov_pg); 1188 } 1189 1190 static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target) 1191 { /* Disconnect-Reconnect page for mode_sense */ 1192 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0, 1193 0, 0, 0, 0, 0, 0, 0, 0}; 1194 1195 memcpy(p, disconnect_pg, sizeof(disconnect_pg)); 1196 if (1 == pcontrol) 1197 memset(p + 2, 0, sizeof(disconnect_pg) - 2); 1198 return sizeof(disconnect_pg); 1199 } 1200 1201 static int resp_format_pg(unsigned char * p, int pcontrol, int target) 1202 { /* Format device page for mode_sense */ 1203 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0, 1204 0, 0, 0, 0, 0, 0, 0, 0, 1205 0, 0, 0, 0, 0x40, 0, 0, 0}; 1206 1207 memcpy(p, format_pg, sizeof(format_pg)); 1208 p[10] = (sdebug_sectors_per >> 8) & 0xff; 1209 p[11] = sdebug_sectors_per & 0xff; 1210 p[12] = (scsi_debug_sector_size >> 8) & 0xff; 1211 p[13] = scsi_debug_sector_size & 0xff; 1212 if (scsi_debug_removable) 1213 p[20] |= 0x20; /* should agree with INQUIRY */ 1214 if (1 == pcontrol) 1215 memset(p + 2, 0, sizeof(format_pg) - 2); 1216 return sizeof(format_pg); 1217 } 1218 1219 static int resp_caching_pg(unsigned char * p, int pcontrol, int target) 1220 { /* Caching page for mode_sense */ 1221 unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, 1222 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0}; 1223 1224 memcpy(p, caching_pg, sizeof(caching_pg)); 1225 if (1 == pcontrol) 1226 memset(p + 2, 0, sizeof(caching_pg) - 2); 1227 return sizeof(caching_pg); 1228 } 1229 1230 static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target) 1231 { /* Control mode page for mode_sense */ 1232 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0, 1233 0, 0, 0, 0}; 1234 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, 1235 0, 0, 0x2, 0x4b}; 1236 1237 if (scsi_debug_dsense) 1238 ctrl_m_pg[2] |= 0x4; 1239 else 1240 ctrl_m_pg[2] &= ~0x4; 1241 1242 if (scsi_debug_ato) 1243 ctrl_m_pg[5] |= 0x80; /* ATO=1 */ 1244 1245 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg)); 1246 if (1 == pcontrol) 1247 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg)); 1248 else if (2 == pcontrol) 1249 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg)); 1250 return sizeof(ctrl_m_pg); 1251 } 1252 1253 1254 static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target) 1255 { /* Informational Exceptions control mode page for mode_sense */ 1256 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0, 1257 0, 0, 0x0, 0x0}; 1258 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, 1259 0, 0, 0x0, 0x0}; 1260 1261 memcpy(p, iec_m_pg, sizeof(iec_m_pg)); 1262 if (1 == pcontrol) 1263 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg)); 1264 else if (2 == pcontrol) 1265 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg)); 1266 return sizeof(iec_m_pg); 1267 } 1268 1269 static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target) 1270 { /* SAS SSP mode page - short format for mode_sense */ 1271 unsigned char sas_sf_m_pg[] = {0x19, 0x6, 1272 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0}; 1273 1274 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg)); 1275 if (1 == pcontrol) 1276 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2); 1277 return sizeof(sas_sf_m_pg); 1278 } 1279 1280 1281 static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target, 1282 int target_dev_id) 1283 { /* SAS phy control and discover mode page for mode_sense */ 1284 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2, 1285 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0, 1286 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0, 1287 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1, 1288 0x2, 0, 0, 0, 0, 0, 0, 0, 1289 0x88, 0x99, 0, 0, 0, 0, 0, 0, 1290 0, 0, 0, 0, 0, 0, 0, 0, 1291 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0, 1292 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0, 1293 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1, 1294 0x3, 0, 0, 0, 0, 0, 0, 0, 1295 0x88, 0x99, 0, 0, 0, 0, 0, 0, 1296 0, 0, 0, 0, 0, 0, 0, 0, 1297 }; 1298 int port_a, port_b; 1299 1300 port_a = target_dev_id + 1; 1301 port_b = port_a + 1; 1302 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg)); 1303 p[20] = (port_a >> 24); 1304 p[21] = (port_a >> 16) & 0xff; 1305 p[22] = (port_a >> 8) & 0xff; 1306 p[23] = port_a & 0xff; 1307 p[48 + 20] = (port_b >> 24); 1308 p[48 + 21] = (port_b >> 16) & 0xff; 1309 p[48 + 22] = (port_b >> 8) & 0xff; 1310 p[48 + 23] = port_b & 0xff; 1311 if (1 == pcontrol) 1312 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4); 1313 return sizeof(sas_pcd_m_pg); 1314 } 1315 1316 static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol) 1317 { /* SAS SSP shared protocol specific port mode subpage */ 1318 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0, 1319 0, 0, 0, 0, 0, 0, 0, 0, 1320 }; 1321 1322 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg)); 1323 if (1 == pcontrol) 1324 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4); 1325 return sizeof(sas_sha_m_pg); 1326 } 1327 1328 #define SDEBUG_MAX_MSENSE_SZ 256 1329 1330 static int resp_mode_sense(struct scsi_cmnd * scp, int target, 1331 struct sdebug_dev_info * devip) 1332 { 1333 unsigned char dbd, llbaa; 1334 int pcontrol, pcode, subpcode, bd_len; 1335 unsigned char dev_spec; 1336 int k, alloc_len, msense_6, offset, len, errsts, target_dev_id; 1337 unsigned char * ap; 1338 unsigned char arr[SDEBUG_MAX_MSENSE_SZ]; 1339 unsigned char *cmd = (unsigned char *)scp->cmnd; 1340 1341 if ((errsts = check_readiness(scp, 1, devip))) 1342 return errsts; 1343 dbd = !!(cmd[1] & 0x8); 1344 pcontrol = (cmd[2] & 0xc0) >> 6; 1345 pcode = cmd[2] & 0x3f; 1346 subpcode = cmd[3]; 1347 msense_6 = (MODE_SENSE == cmd[0]); 1348 llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10); 1349 if ((0 == scsi_debug_ptype) && (0 == dbd)) 1350 bd_len = llbaa ? 16 : 8; 1351 else 1352 bd_len = 0; 1353 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]); 1354 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ); 1355 if (0x3 == pcontrol) { /* Saving values not supported */ 1356 mk_sense_buffer(devip, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 1357 0); 1358 return check_condition_result; 1359 } 1360 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) + 1361 (devip->target * 1000) - 3; 1362 /* set DPOFUA bit for disks */ 1363 if (0 == scsi_debug_ptype) 1364 dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10; 1365 else 1366 dev_spec = 0x0; 1367 if (msense_6) { 1368 arr[2] = dev_spec; 1369 arr[3] = bd_len; 1370 offset = 4; 1371 } else { 1372 arr[3] = dev_spec; 1373 if (16 == bd_len) 1374 arr[4] = 0x1; /* set LONGLBA bit */ 1375 arr[7] = bd_len; /* assume 255 or less */ 1376 offset = 8; 1377 } 1378 ap = arr + offset; 1379 if ((bd_len > 0) && (!sdebug_capacity)) 1380 sdebug_capacity = get_sdebug_capacity(); 1381 1382 if (8 == bd_len) { 1383 if (sdebug_capacity > 0xfffffffe) { 1384 ap[0] = 0xff; 1385 ap[1] = 0xff; 1386 ap[2] = 0xff; 1387 ap[3] = 0xff; 1388 } else { 1389 ap[0] = (sdebug_capacity >> 24) & 0xff; 1390 ap[1] = (sdebug_capacity >> 16) & 0xff; 1391 ap[2] = (sdebug_capacity >> 8) & 0xff; 1392 ap[3] = sdebug_capacity & 0xff; 1393 } 1394 ap[6] = (scsi_debug_sector_size >> 8) & 0xff; 1395 ap[7] = scsi_debug_sector_size & 0xff; 1396 offset += bd_len; 1397 ap = arr + offset; 1398 } else if (16 == bd_len) { 1399 unsigned long long capac = sdebug_capacity; 1400 1401 for (k = 0; k < 8; ++k, capac >>= 8) 1402 ap[7 - k] = capac & 0xff; 1403 ap[12] = (scsi_debug_sector_size >> 24) & 0xff; 1404 ap[13] = (scsi_debug_sector_size >> 16) & 0xff; 1405 ap[14] = (scsi_debug_sector_size >> 8) & 0xff; 1406 ap[15] = scsi_debug_sector_size & 0xff; 1407 offset += bd_len; 1408 ap = arr + offset; 1409 } 1410 1411 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) { 1412 /* TODO: Control Extension page */ 1413 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 1414 0); 1415 return check_condition_result; 1416 } 1417 switch (pcode) { 1418 case 0x1: /* Read-Write error recovery page, direct access */ 1419 len = resp_err_recov_pg(ap, pcontrol, target); 1420 offset += len; 1421 break; 1422 case 0x2: /* Disconnect-Reconnect page, all devices */ 1423 len = resp_disconnect_pg(ap, pcontrol, target); 1424 offset += len; 1425 break; 1426 case 0x3: /* Format device page, direct access */ 1427 len = resp_format_pg(ap, pcontrol, target); 1428 offset += len; 1429 break; 1430 case 0x8: /* Caching page, direct access */ 1431 len = resp_caching_pg(ap, pcontrol, target); 1432 offset += len; 1433 break; 1434 case 0xa: /* Control Mode page, all devices */ 1435 len = resp_ctrl_m_pg(ap, pcontrol, target); 1436 offset += len; 1437 break; 1438 case 0x19: /* if spc==1 then sas phy, control+discover */ 1439 if ((subpcode > 0x2) && (subpcode < 0xff)) { 1440 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1441 INVALID_FIELD_IN_CDB, 0); 1442 return check_condition_result; 1443 } 1444 len = 0; 1445 if ((0x0 == subpcode) || (0xff == subpcode)) 1446 len += resp_sas_sf_m_pg(ap + len, pcontrol, target); 1447 if ((0x1 == subpcode) || (0xff == subpcode)) 1448 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target, 1449 target_dev_id); 1450 if ((0x2 == subpcode) || (0xff == subpcode)) 1451 len += resp_sas_sha_m_spg(ap + len, pcontrol); 1452 offset += len; 1453 break; 1454 case 0x1c: /* Informational Exceptions Mode page, all devices */ 1455 len = resp_iec_m_pg(ap, pcontrol, target); 1456 offset += len; 1457 break; 1458 case 0x3f: /* Read all Mode pages */ 1459 if ((0 == subpcode) || (0xff == subpcode)) { 1460 len = resp_err_recov_pg(ap, pcontrol, target); 1461 len += resp_disconnect_pg(ap + len, pcontrol, target); 1462 len += resp_format_pg(ap + len, pcontrol, target); 1463 len += resp_caching_pg(ap + len, pcontrol, target); 1464 len += resp_ctrl_m_pg(ap + len, pcontrol, target); 1465 len += resp_sas_sf_m_pg(ap + len, pcontrol, target); 1466 if (0xff == subpcode) { 1467 len += resp_sas_pcd_m_spg(ap + len, pcontrol, 1468 target, target_dev_id); 1469 len += resp_sas_sha_m_spg(ap + len, pcontrol); 1470 } 1471 len += resp_iec_m_pg(ap + len, pcontrol, target); 1472 } else { 1473 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1474 INVALID_FIELD_IN_CDB, 0); 1475 return check_condition_result; 1476 } 1477 offset += len; 1478 break; 1479 default: 1480 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 1481 0); 1482 return check_condition_result; 1483 } 1484 if (msense_6) 1485 arr[0] = offset - 1; 1486 else { 1487 arr[0] = ((offset - 2) >> 8) & 0xff; 1488 arr[1] = (offset - 2) & 0xff; 1489 } 1490 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset)); 1491 } 1492 1493 #define SDEBUG_MAX_MSELECT_SZ 512 1494 1495 static int resp_mode_select(struct scsi_cmnd * scp, int mselect6, 1496 struct sdebug_dev_info * devip) 1497 { 1498 int pf, sp, ps, md_len, bd_len, off, spf, pg_len; 1499 int param_len, res, errsts, mpage; 1500 unsigned char arr[SDEBUG_MAX_MSELECT_SZ]; 1501 unsigned char *cmd = (unsigned char *)scp->cmnd; 1502 1503 if ((errsts = check_readiness(scp, 1, devip))) 1504 return errsts; 1505 memset(arr, 0, sizeof(arr)); 1506 pf = cmd[1] & 0x10; 1507 sp = cmd[1] & 0x1; 1508 param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]); 1509 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) { 1510 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1511 INVALID_FIELD_IN_CDB, 0); 1512 return check_condition_result; 1513 } 1514 res = fetch_to_dev_buffer(scp, arr, param_len); 1515 if (-1 == res) 1516 return (DID_ERROR << 16); 1517 else if ((res < param_len) && 1518 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) 1519 printk(KERN_INFO "scsi_debug: mode_select: cdb indicated=%d, " 1520 " IO sent=%d bytes\n", param_len, res); 1521 md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2); 1522 bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]); 1523 if (md_len > 2) { 1524 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1525 INVALID_FIELD_IN_PARAM_LIST, 0); 1526 return check_condition_result; 1527 } 1528 off = bd_len + (mselect6 ? 4 : 8); 1529 mpage = arr[off] & 0x3f; 1530 ps = !!(arr[off] & 0x80); 1531 if (ps) { 1532 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1533 INVALID_FIELD_IN_PARAM_LIST, 0); 1534 return check_condition_result; 1535 } 1536 spf = !!(arr[off] & 0x40); 1537 pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) : 1538 (arr[off + 1] + 2); 1539 if ((pg_len + off) > param_len) { 1540 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1541 PARAMETER_LIST_LENGTH_ERR, 0); 1542 return check_condition_result; 1543 } 1544 switch (mpage) { 1545 case 0xa: /* Control Mode page */ 1546 if (ctrl_m_pg[1] == arr[off + 1]) { 1547 memcpy(ctrl_m_pg + 2, arr + off + 2, 1548 sizeof(ctrl_m_pg) - 2); 1549 scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4); 1550 return 0; 1551 } 1552 break; 1553 case 0x1c: /* Informational Exceptions Mode page */ 1554 if (iec_m_pg[1] == arr[off + 1]) { 1555 memcpy(iec_m_pg + 2, arr + off + 2, 1556 sizeof(iec_m_pg) - 2); 1557 return 0; 1558 } 1559 break; 1560 default: 1561 break; 1562 } 1563 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1564 INVALID_FIELD_IN_PARAM_LIST, 0); 1565 return check_condition_result; 1566 } 1567 1568 static int resp_temp_l_pg(unsigned char * arr) 1569 { 1570 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38, 1571 0x0, 0x1, 0x3, 0x2, 0x0, 65, 1572 }; 1573 1574 memcpy(arr, temp_l_pg, sizeof(temp_l_pg)); 1575 return sizeof(temp_l_pg); 1576 } 1577 1578 static int resp_ie_l_pg(unsigned char * arr) 1579 { 1580 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38, 1581 }; 1582 1583 memcpy(arr, ie_l_pg, sizeof(ie_l_pg)); 1584 if (iec_m_pg[2] & 0x4) { /* TEST bit set */ 1585 arr[4] = THRESHOLD_EXCEEDED; 1586 arr[5] = 0xff; 1587 } 1588 return sizeof(ie_l_pg); 1589 } 1590 1591 #define SDEBUG_MAX_LSENSE_SZ 512 1592 1593 static int resp_log_sense(struct scsi_cmnd * scp, 1594 struct sdebug_dev_info * devip) 1595 { 1596 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, errsts, len, n; 1597 unsigned char arr[SDEBUG_MAX_LSENSE_SZ]; 1598 unsigned char *cmd = (unsigned char *)scp->cmnd; 1599 1600 if ((errsts = check_readiness(scp, 1, devip))) 1601 return errsts; 1602 memset(arr, 0, sizeof(arr)); 1603 ppc = cmd[1] & 0x2; 1604 sp = cmd[1] & 0x1; 1605 if (ppc || sp) { 1606 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1607 INVALID_FIELD_IN_CDB, 0); 1608 return check_condition_result; 1609 } 1610 pcontrol = (cmd[2] & 0xc0) >> 6; 1611 pcode = cmd[2] & 0x3f; 1612 subpcode = cmd[3] & 0xff; 1613 alloc_len = (cmd[7] << 8) + cmd[8]; 1614 arr[0] = pcode; 1615 if (0 == subpcode) { 1616 switch (pcode) { 1617 case 0x0: /* Supported log pages log page */ 1618 n = 4; 1619 arr[n++] = 0x0; /* this page */ 1620 arr[n++] = 0xd; /* Temperature */ 1621 arr[n++] = 0x2f; /* Informational exceptions */ 1622 arr[3] = n - 4; 1623 break; 1624 case 0xd: /* Temperature log page */ 1625 arr[3] = resp_temp_l_pg(arr + 4); 1626 break; 1627 case 0x2f: /* Informational exceptions log page */ 1628 arr[3] = resp_ie_l_pg(arr + 4); 1629 break; 1630 default: 1631 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1632 INVALID_FIELD_IN_CDB, 0); 1633 return check_condition_result; 1634 } 1635 } else if (0xff == subpcode) { 1636 arr[0] |= 0x40; 1637 arr[1] = subpcode; 1638 switch (pcode) { 1639 case 0x0: /* Supported log pages and subpages log page */ 1640 n = 4; 1641 arr[n++] = 0x0; 1642 arr[n++] = 0x0; /* 0,0 page */ 1643 arr[n++] = 0x0; 1644 arr[n++] = 0xff; /* this page */ 1645 arr[n++] = 0xd; 1646 arr[n++] = 0x0; /* Temperature */ 1647 arr[n++] = 0x2f; 1648 arr[n++] = 0x0; /* Informational exceptions */ 1649 arr[3] = n - 4; 1650 break; 1651 case 0xd: /* Temperature subpages */ 1652 n = 4; 1653 arr[n++] = 0xd; 1654 arr[n++] = 0x0; /* Temperature */ 1655 arr[3] = n - 4; 1656 break; 1657 case 0x2f: /* Informational exceptions subpages */ 1658 n = 4; 1659 arr[n++] = 0x2f; 1660 arr[n++] = 0x0; /* Informational exceptions */ 1661 arr[3] = n - 4; 1662 break; 1663 default: 1664 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1665 INVALID_FIELD_IN_CDB, 0); 1666 return check_condition_result; 1667 } 1668 } else { 1669 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1670 INVALID_FIELD_IN_CDB, 0); 1671 return check_condition_result; 1672 } 1673 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len); 1674 return fill_from_dev_buffer(scp, arr, 1675 min(len, SDEBUG_MAX_INQ_ARR_SZ)); 1676 } 1677 1678 static int check_device_access_params(struct sdebug_dev_info *devi, 1679 unsigned long long lba, unsigned int num) 1680 { 1681 if (lba + num > sdebug_capacity) { 1682 mk_sense_buffer(devi, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, 0); 1683 return check_condition_result; 1684 } 1685 /* transfer length excessive (tie in to block limits VPD page) */ 1686 if (num > sdebug_store_sectors) { 1687 mk_sense_buffer(devi, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 1688 return check_condition_result; 1689 } 1690 return 0; 1691 } 1692 1693 /* Returns number of bytes copied or -1 if error. */ 1694 static int do_device_access(struct scsi_cmnd *scmd, 1695 struct sdebug_dev_info *devi, 1696 unsigned long long lba, unsigned int num, int write) 1697 { 1698 int ret; 1699 unsigned long long block, rest = 0; 1700 struct scsi_data_buffer *sdb; 1701 enum dma_data_direction dir; 1702 size_t (*func)(struct scatterlist *, unsigned int, void *, size_t, 1703 off_t); 1704 1705 if (write) { 1706 sdb = scsi_out(scmd); 1707 dir = DMA_TO_DEVICE; 1708 func = sg_pcopy_to_buffer; 1709 } else { 1710 sdb = scsi_in(scmd); 1711 dir = DMA_FROM_DEVICE; 1712 func = sg_pcopy_from_buffer; 1713 } 1714 1715 if (!sdb->length) 1716 return 0; 1717 if (!(scsi_bidi_cmnd(scmd) || scmd->sc_data_direction == dir)) 1718 return -1; 1719 1720 block = do_div(lba, sdebug_store_sectors); 1721 if (block + num > sdebug_store_sectors) 1722 rest = block + num - sdebug_store_sectors; 1723 1724 ret = func(sdb->table.sgl, sdb->table.nents, 1725 fake_storep + (block * scsi_debug_sector_size), 1726 (num - rest) * scsi_debug_sector_size, 0); 1727 if (ret != (num - rest) * scsi_debug_sector_size) 1728 return ret; 1729 1730 if (rest) { 1731 ret += func(sdb->table.sgl, sdb->table.nents, 1732 fake_storep, rest * scsi_debug_sector_size, 1733 (num - rest) * scsi_debug_sector_size); 1734 } 1735 1736 return ret; 1737 } 1738 1739 static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec, 1740 unsigned int sectors, u32 ei_lba) 1741 { 1742 unsigned int i, resid; 1743 struct scatterlist *psgl; 1744 struct sd_dif_tuple *sdt; 1745 sector_t sector; 1746 sector_t tmp_sec = start_sec; 1747 void *paddr; 1748 1749 start_sec = do_div(tmp_sec, sdebug_store_sectors); 1750 1751 sdt = (struct sd_dif_tuple *)(dif_storep + dif_offset(start_sec)); 1752 1753 for (i = 0 ; i < sectors ; i++) { 1754 u16 csum; 1755 1756 if (sdt[i].app_tag == 0xffff) 1757 continue; 1758 1759 sector = start_sec + i; 1760 1761 switch (scsi_debug_guard) { 1762 case 1: 1763 csum = ip_compute_csum(fake_storep + 1764 sector * scsi_debug_sector_size, 1765 scsi_debug_sector_size); 1766 break; 1767 case 0: 1768 csum = crc_t10dif(fake_storep + 1769 sector * scsi_debug_sector_size, 1770 scsi_debug_sector_size); 1771 csum = cpu_to_be16(csum); 1772 break; 1773 default: 1774 BUG(); 1775 } 1776 1777 if (sdt[i].guard_tag != csum) { 1778 printk(KERN_ERR "%s: GUARD check failed on sector %lu" \ 1779 " rcvd 0x%04x, data 0x%04x\n", __func__, 1780 (unsigned long)sector, 1781 be16_to_cpu(sdt[i].guard_tag), 1782 be16_to_cpu(csum)); 1783 dif_errors++; 1784 return 0x01; 1785 } 1786 1787 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION && 1788 be32_to_cpu(sdt[i].ref_tag) != (sector & 0xffffffff)) { 1789 printk(KERN_ERR "%s: REF check failed on sector %lu\n", 1790 __func__, (unsigned long)sector); 1791 dif_errors++; 1792 return 0x03; 1793 } 1794 1795 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && 1796 be32_to_cpu(sdt[i].ref_tag) != ei_lba) { 1797 printk(KERN_ERR "%s: REF check failed on sector %lu\n", 1798 __func__, (unsigned long)sector); 1799 dif_errors++; 1800 return 0x03; 1801 } 1802 1803 ei_lba++; 1804 } 1805 1806 resid = sectors * 8; /* Bytes of protection data to copy into sgl */ 1807 sector = start_sec; 1808 1809 scsi_for_each_prot_sg(SCpnt, psgl, scsi_prot_sg_count(SCpnt), i) { 1810 int len = min(psgl->length, resid); 1811 1812 paddr = kmap_atomic(sg_page(psgl)) + psgl->offset; 1813 memcpy(paddr, dif_storep + dif_offset(sector), len); 1814 1815 sector += len >> 3; 1816 if (sector >= sdebug_store_sectors) { 1817 /* Force wrap */ 1818 tmp_sec = sector; 1819 sector = do_div(tmp_sec, sdebug_store_sectors); 1820 } 1821 resid -= len; 1822 kunmap_atomic(paddr); 1823 } 1824 1825 dix_reads++; 1826 1827 return 0; 1828 } 1829 1830 static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba, 1831 unsigned int num, struct sdebug_dev_info *devip, 1832 u32 ei_lba) 1833 { 1834 unsigned long iflags; 1835 int ret; 1836 1837 ret = check_device_access_params(devip, lba, num); 1838 if (ret) 1839 return ret; 1840 1841 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) && 1842 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) && 1843 ((lba + num) > OPT_MEDIUM_ERR_ADDR)) { 1844 /* claim unrecoverable read error */ 1845 mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0); 1846 /* set info field and valid bit for fixed descriptor */ 1847 if (0x70 == (devip->sense_buff[0] & 0x7f)) { 1848 devip->sense_buff[0] |= 0x80; /* Valid bit */ 1849 ret = (lba < OPT_MEDIUM_ERR_ADDR) 1850 ? OPT_MEDIUM_ERR_ADDR : (int)lba; 1851 devip->sense_buff[3] = (ret >> 24) & 0xff; 1852 devip->sense_buff[4] = (ret >> 16) & 0xff; 1853 devip->sense_buff[5] = (ret >> 8) & 0xff; 1854 devip->sense_buff[6] = ret & 0xff; 1855 } 1856 scsi_set_resid(SCpnt, scsi_bufflen(SCpnt)); 1857 return check_condition_result; 1858 } 1859 1860 /* DIX + T10 DIF */ 1861 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) { 1862 int prot_ret = prot_verify_read(SCpnt, lba, num, ei_lba); 1863 1864 if (prot_ret) { 1865 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, prot_ret); 1866 return illegal_condition_result; 1867 } 1868 } 1869 1870 read_lock_irqsave(&atomic_rw, iflags); 1871 ret = do_device_access(SCpnt, devip, lba, num, 0); 1872 read_unlock_irqrestore(&atomic_rw, iflags); 1873 if (ret == -1) 1874 return DID_ERROR << 16; 1875 1876 scsi_in(SCpnt)->resid = scsi_bufflen(SCpnt) - ret; 1877 1878 return 0; 1879 } 1880 1881 void dump_sector(unsigned char *buf, int len) 1882 { 1883 int i, j; 1884 1885 printk(KERN_ERR ">>> Sector Dump <<<\n"); 1886 1887 for (i = 0 ; i < len ; i += 16) { 1888 printk(KERN_ERR "%04d: ", i); 1889 1890 for (j = 0 ; j < 16 ; j++) { 1891 unsigned char c = buf[i+j]; 1892 if (c >= 0x20 && c < 0x7e) 1893 printk(" %c ", buf[i+j]); 1894 else 1895 printk("%02x ", buf[i+j]); 1896 } 1897 1898 printk("\n"); 1899 } 1900 } 1901 1902 static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec, 1903 unsigned int sectors, u32 ei_lba) 1904 { 1905 int i, j, ret; 1906 struct sd_dif_tuple *sdt; 1907 struct scatterlist *dsgl = scsi_sglist(SCpnt); 1908 struct scatterlist *psgl = scsi_prot_sglist(SCpnt); 1909 void *daddr, *paddr; 1910 sector_t tmp_sec = start_sec; 1911 sector_t sector; 1912 int ppage_offset; 1913 unsigned short csum; 1914 1915 sector = do_div(tmp_sec, sdebug_store_sectors); 1916 1917 BUG_ON(scsi_sg_count(SCpnt) == 0); 1918 BUG_ON(scsi_prot_sg_count(SCpnt) == 0); 1919 1920 paddr = kmap_atomic(sg_page(psgl)) + psgl->offset; 1921 ppage_offset = 0; 1922 1923 /* For each data page */ 1924 scsi_for_each_sg(SCpnt, dsgl, scsi_sg_count(SCpnt), i) { 1925 daddr = kmap_atomic(sg_page(dsgl)) + dsgl->offset; 1926 1927 /* For each sector-sized chunk in data page */ 1928 for (j = 0 ; j < dsgl->length ; j += scsi_debug_sector_size) { 1929 1930 /* If we're at the end of the current 1931 * protection page advance to the next one 1932 */ 1933 if (ppage_offset >= psgl->length) { 1934 kunmap_atomic(paddr); 1935 psgl = sg_next(psgl); 1936 BUG_ON(psgl == NULL); 1937 paddr = kmap_atomic(sg_page(psgl)) 1938 + psgl->offset; 1939 ppage_offset = 0; 1940 } 1941 1942 sdt = paddr + ppage_offset; 1943 1944 switch (scsi_debug_guard) { 1945 case 1: 1946 csum = ip_compute_csum(daddr, 1947 scsi_debug_sector_size); 1948 break; 1949 case 0: 1950 csum = cpu_to_be16(crc_t10dif(daddr, 1951 scsi_debug_sector_size)); 1952 break; 1953 default: 1954 BUG(); 1955 ret = 0; 1956 goto out; 1957 } 1958 1959 if (sdt->guard_tag != csum) { 1960 printk(KERN_ERR 1961 "%s: GUARD check failed on sector %lu " \ 1962 "rcvd 0x%04x, calculated 0x%04x\n", 1963 __func__, (unsigned long)sector, 1964 be16_to_cpu(sdt->guard_tag), 1965 be16_to_cpu(csum)); 1966 ret = 0x01; 1967 dump_sector(daddr, scsi_debug_sector_size); 1968 goto out; 1969 } 1970 1971 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION && 1972 be32_to_cpu(sdt->ref_tag) 1973 != (start_sec & 0xffffffff)) { 1974 printk(KERN_ERR 1975 "%s: REF check failed on sector %lu\n", 1976 __func__, (unsigned long)sector); 1977 ret = 0x03; 1978 dump_sector(daddr, scsi_debug_sector_size); 1979 goto out; 1980 } 1981 1982 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && 1983 be32_to_cpu(sdt->ref_tag) != ei_lba) { 1984 printk(KERN_ERR 1985 "%s: REF check failed on sector %lu\n", 1986 __func__, (unsigned long)sector); 1987 ret = 0x03; 1988 dump_sector(daddr, scsi_debug_sector_size); 1989 goto out; 1990 } 1991 1992 /* Would be great to copy this in bigger 1993 * chunks. However, for the sake of 1994 * correctness we need to verify each sector 1995 * before writing it to "stable" storage 1996 */ 1997 memcpy(dif_storep + dif_offset(sector), sdt, 8); 1998 1999 sector++; 2000 2001 if (sector == sdebug_store_sectors) 2002 sector = 0; /* Force wrap */ 2003 2004 start_sec++; 2005 ei_lba++; 2006 daddr += scsi_debug_sector_size; 2007 ppage_offset += sizeof(struct sd_dif_tuple); 2008 } 2009 2010 kunmap_atomic(daddr); 2011 } 2012 2013 kunmap_atomic(paddr); 2014 2015 dix_writes++; 2016 2017 return 0; 2018 2019 out: 2020 dif_errors++; 2021 kunmap_atomic(daddr); 2022 kunmap_atomic(paddr); 2023 return ret; 2024 } 2025 2026 static unsigned long lba_to_map_index(sector_t lba) 2027 { 2028 if (scsi_debug_unmap_alignment) { 2029 lba += scsi_debug_unmap_granularity - 2030 scsi_debug_unmap_alignment; 2031 } 2032 do_div(lba, scsi_debug_unmap_granularity); 2033 2034 return lba; 2035 } 2036 2037 static sector_t map_index_to_lba(unsigned long index) 2038 { 2039 return index * scsi_debug_unmap_granularity - 2040 scsi_debug_unmap_alignment; 2041 } 2042 2043 static unsigned int map_state(sector_t lba, unsigned int *num) 2044 { 2045 sector_t end; 2046 unsigned int mapped; 2047 unsigned long index; 2048 unsigned long next; 2049 2050 index = lba_to_map_index(lba); 2051 mapped = test_bit(index, map_storep); 2052 2053 if (mapped) 2054 next = find_next_zero_bit(map_storep, map_size, index); 2055 else 2056 next = find_next_bit(map_storep, map_size, index); 2057 2058 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next)); 2059 *num = end - lba; 2060 2061 return mapped; 2062 } 2063 2064 static void map_region(sector_t lba, unsigned int len) 2065 { 2066 sector_t end = lba + len; 2067 2068 while (lba < end) { 2069 unsigned long index = lba_to_map_index(lba); 2070 2071 if (index < map_size) 2072 set_bit(index, map_storep); 2073 2074 lba = map_index_to_lba(index + 1); 2075 } 2076 } 2077 2078 static void unmap_region(sector_t lba, unsigned int len) 2079 { 2080 sector_t end = lba + len; 2081 2082 while (lba < end) { 2083 unsigned long index = lba_to_map_index(lba); 2084 2085 if (lba == map_index_to_lba(index) && 2086 lba + scsi_debug_unmap_granularity <= end && 2087 index < map_size) { 2088 clear_bit(index, map_storep); 2089 if (scsi_debug_lbprz) { 2090 memset(fake_storep + 2091 lba * scsi_debug_sector_size, 0, 2092 scsi_debug_sector_size * 2093 scsi_debug_unmap_granularity); 2094 } 2095 } 2096 lba = map_index_to_lba(index + 1); 2097 } 2098 } 2099 2100 static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba, 2101 unsigned int num, struct sdebug_dev_info *devip, 2102 u32 ei_lba) 2103 { 2104 unsigned long iflags; 2105 int ret; 2106 2107 ret = check_device_access_params(devip, lba, num); 2108 if (ret) 2109 return ret; 2110 2111 /* DIX + T10 DIF */ 2112 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) { 2113 int prot_ret = prot_verify_write(SCpnt, lba, num, ei_lba); 2114 2115 if (prot_ret) { 2116 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, prot_ret); 2117 return illegal_condition_result; 2118 } 2119 } 2120 2121 write_lock_irqsave(&atomic_rw, iflags); 2122 ret = do_device_access(SCpnt, devip, lba, num, 1); 2123 if (scsi_debug_lbp()) 2124 map_region(lba, num); 2125 write_unlock_irqrestore(&atomic_rw, iflags); 2126 if (-1 == ret) 2127 return (DID_ERROR << 16); 2128 else if ((ret < (num * scsi_debug_sector_size)) && 2129 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) 2130 printk(KERN_INFO "scsi_debug: write: cdb indicated=%u, " 2131 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret); 2132 2133 return 0; 2134 } 2135 2136 static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba, 2137 unsigned int num, struct sdebug_dev_info *devip, 2138 u32 ei_lba, unsigned int unmap) 2139 { 2140 unsigned long iflags; 2141 unsigned long long i; 2142 int ret; 2143 2144 ret = check_device_access_params(devip, lba, num); 2145 if (ret) 2146 return ret; 2147 2148 if (num > scsi_debug_write_same_length) { 2149 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 2150 0); 2151 return check_condition_result; 2152 } 2153 2154 write_lock_irqsave(&atomic_rw, iflags); 2155 2156 if (unmap && scsi_debug_lbp()) { 2157 unmap_region(lba, num); 2158 goto out; 2159 } 2160 2161 /* Else fetch one logical block */ 2162 ret = fetch_to_dev_buffer(scmd, 2163 fake_storep + (lba * scsi_debug_sector_size), 2164 scsi_debug_sector_size); 2165 2166 if (-1 == ret) { 2167 write_unlock_irqrestore(&atomic_rw, iflags); 2168 return (DID_ERROR << 16); 2169 } else if ((ret < (num * scsi_debug_sector_size)) && 2170 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) 2171 printk(KERN_INFO "scsi_debug: write same: cdb indicated=%u, " 2172 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret); 2173 2174 /* Copy first sector to remaining blocks */ 2175 for (i = 1 ; i < num ; i++) 2176 memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size), 2177 fake_storep + (lba * scsi_debug_sector_size), 2178 scsi_debug_sector_size); 2179 2180 if (scsi_debug_lbp()) 2181 map_region(lba, num); 2182 out: 2183 write_unlock_irqrestore(&atomic_rw, iflags); 2184 2185 return 0; 2186 } 2187 2188 struct unmap_block_desc { 2189 __be64 lba; 2190 __be32 blocks; 2191 __be32 __reserved; 2192 }; 2193 2194 static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip) 2195 { 2196 unsigned char *buf; 2197 struct unmap_block_desc *desc; 2198 unsigned int i, payload_len, descriptors; 2199 int ret; 2200 2201 ret = check_readiness(scmd, 1, devip); 2202 if (ret) 2203 return ret; 2204 2205 payload_len = get_unaligned_be16(&scmd->cmnd[7]); 2206 BUG_ON(scsi_bufflen(scmd) != payload_len); 2207 2208 descriptors = (payload_len - 8) / 16; 2209 2210 buf = kmalloc(scsi_bufflen(scmd), GFP_ATOMIC); 2211 if (!buf) 2212 return check_condition_result; 2213 2214 scsi_sg_copy_to_buffer(scmd, buf, scsi_bufflen(scmd)); 2215 2216 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2); 2217 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16); 2218 2219 desc = (void *)&buf[8]; 2220 2221 for (i = 0 ; i < descriptors ; i++) { 2222 unsigned long long lba = get_unaligned_be64(&desc[i].lba); 2223 unsigned int num = get_unaligned_be32(&desc[i].blocks); 2224 2225 ret = check_device_access_params(devip, lba, num); 2226 if (ret) 2227 goto out; 2228 2229 unmap_region(lba, num); 2230 } 2231 2232 ret = 0; 2233 2234 out: 2235 kfree(buf); 2236 2237 return ret; 2238 } 2239 2240 #define SDEBUG_GET_LBA_STATUS_LEN 32 2241 2242 static int resp_get_lba_status(struct scsi_cmnd * scmd, 2243 struct sdebug_dev_info * devip) 2244 { 2245 unsigned long long lba; 2246 unsigned int alloc_len, mapped, num; 2247 unsigned char arr[SDEBUG_GET_LBA_STATUS_LEN]; 2248 int ret; 2249 2250 ret = check_readiness(scmd, 1, devip); 2251 if (ret) 2252 return ret; 2253 2254 lba = get_unaligned_be64(&scmd->cmnd[2]); 2255 alloc_len = get_unaligned_be32(&scmd->cmnd[10]); 2256 2257 if (alloc_len < 24) 2258 return 0; 2259 2260 ret = check_device_access_params(devip, lba, 1); 2261 if (ret) 2262 return ret; 2263 2264 mapped = map_state(lba, &num); 2265 2266 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN); 2267 put_unaligned_be32(20, &arr[0]); /* Parameter Data Length */ 2268 put_unaligned_be64(lba, &arr[8]); /* LBA */ 2269 put_unaligned_be32(num, &arr[16]); /* Number of blocks */ 2270 arr[20] = !mapped; /* mapped = 0, unmapped = 1 */ 2271 2272 return fill_from_dev_buffer(scmd, arr, SDEBUG_GET_LBA_STATUS_LEN); 2273 } 2274 2275 #define SDEBUG_RLUN_ARR_SZ 256 2276 2277 static int resp_report_luns(struct scsi_cmnd * scp, 2278 struct sdebug_dev_info * devip) 2279 { 2280 unsigned int alloc_len; 2281 int lun_cnt, i, upper, num, n, wlun, lun; 2282 unsigned char *cmd = (unsigned char *)scp->cmnd; 2283 int select_report = (int)cmd[2]; 2284 struct scsi_lun *one_lun; 2285 unsigned char arr[SDEBUG_RLUN_ARR_SZ]; 2286 unsigned char * max_addr; 2287 2288 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24); 2289 if ((alloc_len < 4) || (select_report > 2)) { 2290 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 2291 0); 2292 return check_condition_result; 2293 } 2294 /* can produce response with up to 16k luns (lun 0 to lun 16383) */ 2295 memset(arr, 0, SDEBUG_RLUN_ARR_SZ); 2296 lun_cnt = scsi_debug_max_luns; 2297 if (1 == select_report) 2298 lun_cnt = 0; 2299 else if (scsi_debug_no_lun_0 && (lun_cnt > 0)) 2300 --lun_cnt; 2301 wlun = (select_report > 0) ? 1 : 0; 2302 num = lun_cnt + wlun; 2303 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff; 2304 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff; 2305 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) / 2306 sizeof(struct scsi_lun)), num); 2307 if (n < num) { 2308 wlun = 0; 2309 lun_cnt = n; 2310 } 2311 one_lun = (struct scsi_lun *) &arr[8]; 2312 max_addr = arr + SDEBUG_RLUN_ARR_SZ; 2313 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0); 2314 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr)); 2315 i++, lun++) { 2316 upper = (lun >> 8) & 0x3f; 2317 if (upper) 2318 one_lun[i].scsi_lun[0] = 2319 (upper | (SAM2_LUN_ADDRESS_METHOD << 6)); 2320 one_lun[i].scsi_lun[1] = lun & 0xff; 2321 } 2322 if (wlun) { 2323 one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff; 2324 one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff; 2325 i++; 2326 } 2327 alloc_len = (unsigned char *)(one_lun + i) - arr; 2328 return fill_from_dev_buffer(scp, arr, 2329 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ)); 2330 } 2331 2332 static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba, 2333 unsigned int num, struct sdebug_dev_info *devip) 2334 { 2335 int i, j, ret = -1; 2336 unsigned char *kaddr, *buf; 2337 unsigned int offset; 2338 struct scatterlist *sg; 2339 struct scsi_data_buffer *sdb = scsi_in(scp); 2340 2341 /* better not to use temporary buffer. */ 2342 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC); 2343 if (!buf) 2344 return ret; 2345 2346 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp)); 2347 2348 offset = 0; 2349 for_each_sg(sdb->table.sgl, sg, sdb->table.nents, i) { 2350 kaddr = (unsigned char *)kmap_atomic(sg_page(sg)); 2351 if (!kaddr) 2352 goto out; 2353 2354 for (j = 0; j < sg->length; j++) 2355 *(kaddr + sg->offset + j) ^= *(buf + offset + j); 2356 2357 offset += sg->length; 2358 kunmap_atomic(kaddr); 2359 } 2360 ret = 0; 2361 out: 2362 kfree(buf); 2363 2364 return ret; 2365 } 2366 2367 /* When timer goes off this function is called. */ 2368 static void timer_intr_handler(unsigned long indx) 2369 { 2370 struct sdebug_queued_cmd * sqcp; 2371 unsigned long iflags; 2372 2373 if (indx >= scsi_debug_max_queue) { 2374 printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too " 2375 "large\n"); 2376 return; 2377 } 2378 spin_lock_irqsave(&queued_arr_lock, iflags); 2379 sqcp = &queued_arr[(int)indx]; 2380 if (! sqcp->in_use) { 2381 printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected " 2382 "interrupt\n"); 2383 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2384 return; 2385 } 2386 sqcp->in_use = 0; 2387 if (sqcp->done_funct) { 2388 sqcp->a_cmnd->result = sqcp->scsi_result; 2389 sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */ 2390 } 2391 sqcp->done_funct = NULL; 2392 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2393 } 2394 2395 2396 static struct sdebug_dev_info * 2397 sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags) 2398 { 2399 struct sdebug_dev_info *devip; 2400 2401 devip = kzalloc(sizeof(*devip), flags); 2402 if (devip) { 2403 devip->sdbg_host = sdbg_host; 2404 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list); 2405 } 2406 return devip; 2407 } 2408 2409 static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev) 2410 { 2411 struct sdebug_host_info * sdbg_host; 2412 struct sdebug_dev_info * open_devip = NULL; 2413 struct sdebug_dev_info * devip = 2414 (struct sdebug_dev_info *)sdev->hostdata; 2415 2416 if (devip) 2417 return devip; 2418 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host); 2419 if (!sdbg_host) { 2420 printk(KERN_ERR "Host info NULL\n"); 2421 return NULL; 2422 } 2423 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { 2424 if ((devip->used) && (devip->channel == sdev->channel) && 2425 (devip->target == sdev->id) && 2426 (devip->lun == sdev->lun)) 2427 return devip; 2428 else { 2429 if ((!devip->used) && (!open_devip)) 2430 open_devip = devip; 2431 } 2432 } 2433 if (!open_devip) { /* try and make a new one */ 2434 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC); 2435 if (!open_devip) { 2436 printk(KERN_ERR "%s: out of memory at line %d\n", 2437 __func__, __LINE__); 2438 return NULL; 2439 } 2440 } 2441 2442 open_devip->channel = sdev->channel; 2443 open_devip->target = sdev->id; 2444 open_devip->lun = sdev->lun; 2445 open_devip->sdbg_host = sdbg_host; 2446 open_devip->reset = 1; 2447 open_devip->used = 1; 2448 memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN); 2449 if (scsi_debug_dsense) 2450 open_devip->sense_buff[0] = 0x72; 2451 else { 2452 open_devip->sense_buff[0] = 0x70; 2453 open_devip->sense_buff[7] = 0xa; 2454 } 2455 if (sdev->lun == SAM2_WLUN_REPORT_LUNS) 2456 open_devip->wlun = SAM2_WLUN_REPORT_LUNS & 0xff; 2457 2458 return open_devip; 2459 } 2460 2461 static int scsi_debug_slave_alloc(struct scsi_device *sdp) 2462 { 2463 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2464 printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %u>\n", 2465 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 2466 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue); 2467 return 0; 2468 } 2469 2470 static int scsi_debug_slave_configure(struct scsi_device *sdp) 2471 { 2472 struct sdebug_dev_info *devip; 2473 2474 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2475 printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %u>\n", 2476 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 2477 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN) 2478 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN; 2479 devip = devInfoReg(sdp); 2480 if (NULL == devip) 2481 return 1; /* no resources, will be marked offline */ 2482 sdp->hostdata = devip; 2483 if (sdp->host->cmd_per_lun) 2484 scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING, 2485 sdp->host->cmd_per_lun); 2486 blk_queue_max_segment_size(sdp->request_queue, 256 * 1024); 2487 if (scsi_debug_no_uld) 2488 sdp->no_uld_attach = 1; 2489 return 0; 2490 } 2491 2492 static void scsi_debug_slave_destroy(struct scsi_device *sdp) 2493 { 2494 struct sdebug_dev_info *devip = 2495 (struct sdebug_dev_info *)sdp->hostdata; 2496 2497 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2498 printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %u>\n", 2499 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 2500 if (devip) { 2501 /* make this slot available for re-use */ 2502 devip->used = 0; 2503 sdp->hostdata = NULL; 2504 } 2505 } 2506 2507 /* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */ 2508 static int stop_queued_cmnd(struct scsi_cmnd *cmnd) 2509 { 2510 unsigned long iflags; 2511 int k; 2512 struct sdebug_queued_cmd *sqcp; 2513 2514 spin_lock_irqsave(&queued_arr_lock, iflags); 2515 for (k = 0; k < scsi_debug_max_queue; ++k) { 2516 sqcp = &queued_arr[k]; 2517 if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) { 2518 del_timer_sync(&sqcp->cmnd_timer); 2519 sqcp->in_use = 0; 2520 sqcp->a_cmnd = NULL; 2521 break; 2522 } 2523 } 2524 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2525 return (k < scsi_debug_max_queue) ? 1 : 0; 2526 } 2527 2528 /* Deletes (stops) timers of all queued commands */ 2529 static void stop_all_queued(void) 2530 { 2531 unsigned long iflags; 2532 int k; 2533 struct sdebug_queued_cmd *sqcp; 2534 2535 spin_lock_irqsave(&queued_arr_lock, iflags); 2536 for (k = 0; k < scsi_debug_max_queue; ++k) { 2537 sqcp = &queued_arr[k]; 2538 if (sqcp->in_use && sqcp->a_cmnd) { 2539 del_timer_sync(&sqcp->cmnd_timer); 2540 sqcp->in_use = 0; 2541 sqcp->a_cmnd = NULL; 2542 } 2543 } 2544 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2545 } 2546 2547 static int scsi_debug_abort(struct scsi_cmnd * SCpnt) 2548 { 2549 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2550 printk(KERN_INFO "scsi_debug: abort\n"); 2551 ++num_aborts; 2552 stop_queued_cmnd(SCpnt); 2553 return SUCCESS; 2554 } 2555 2556 static int scsi_debug_biosparam(struct scsi_device *sdev, 2557 struct block_device * bdev, sector_t capacity, int *info) 2558 { 2559 int res; 2560 unsigned char *buf; 2561 2562 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2563 printk(KERN_INFO "scsi_debug: biosparam\n"); 2564 buf = scsi_bios_ptable(bdev); 2565 if (buf) { 2566 res = scsi_partsize(buf, capacity, 2567 &info[2], &info[0], &info[1]); 2568 kfree(buf); 2569 if (! res) 2570 return res; 2571 } 2572 info[0] = sdebug_heads; 2573 info[1] = sdebug_sectors_per; 2574 info[2] = sdebug_cylinders_per; 2575 return 0; 2576 } 2577 2578 static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt) 2579 { 2580 struct sdebug_dev_info * devip; 2581 2582 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2583 printk(KERN_INFO "scsi_debug: device_reset\n"); 2584 ++num_dev_resets; 2585 if (SCpnt) { 2586 devip = devInfoReg(SCpnt->device); 2587 if (devip) 2588 devip->reset = 1; 2589 } 2590 return SUCCESS; 2591 } 2592 2593 static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt) 2594 { 2595 struct sdebug_host_info *sdbg_host; 2596 struct sdebug_dev_info * dev_info; 2597 struct scsi_device * sdp; 2598 struct Scsi_Host * hp; 2599 2600 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2601 printk(KERN_INFO "scsi_debug: bus_reset\n"); 2602 ++num_bus_resets; 2603 if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) { 2604 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp); 2605 if (sdbg_host) { 2606 list_for_each_entry(dev_info, 2607 &sdbg_host->dev_info_list, 2608 dev_list) 2609 dev_info->reset = 1; 2610 } 2611 } 2612 return SUCCESS; 2613 } 2614 2615 static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt) 2616 { 2617 struct sdebug_host_info * sdbg_host; 2618 struct sdebug_dev_info * dev_info; 2619 2620 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2621 printk(KERN_INFO "scsi_debug: host_reset\n"); 2622 ++num_host_resets; 2623 spin_lock(&sdebug_host_list_lock); 2624 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { 2625 list_for_each_entry(dev_info, &sdbg_host->dev_info_list, 2626 dev_list) 2627 dev_info->reset = 1; 2628 } 2629 spin_unlock(&sdebug_host_list_lock); 2630 stop_all_queued(); 2631 return SUCCESS; 2632 } 2633 2634 /* Initializes timers in queued array */ 2635 static void __init init_all_queued(void) 2636 { 2637 unsigned long iflags; 2638 int k; 2639 struct sdebug_queued_cmd * sqcp; 2640 2641 spin_lock_irqsave(&queued_arr_lock, iflags); 2642 for (k = 0; k < scsi_debug_max_queue; ++k) { 2643 sqcp = &queued_arr[k]; 2644 init_timer(&sqcp->cmnd_timer); 2645 sqcp->in_use = 0; 2646 sqcp->a_cmnd = NULL; 2647 } 2648 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2649 } 2650 2651 static void __init sdebug_build_parts(unsigned char *ramp, 2652 unsigned long store_size) 2653 { 2654 struct partition * pp; 2655 int starts[SDEBUG_MAX_PARTS + 2]; 2656 int sectors_per_part, num_sectors, k; 2657 int heads_by_sects, start_sec, end_sec; 2658 2659 /* assume partition table already zeroed */ 2660 if ((scsi_debug_num_parts < 1) || (store_size < 1048576)) 2661 return; 2662 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) { 2663 scsi_debug_num_parts = SDEBUG_MAX_PARTS; 2664 printk(KERN_WARNING "scsi_debug:build_parts: reducing " 2665 "partitions to %d\n", SDEBUG_MAX_PARTS); 2666 } 2667 num_sectors = (int)sdebug_store_sectors; 2668 sectors_per_part = (num_sectors - sdebug_sectors_per) 2669 / scsi_debug_num_parts; 2670 heads_by_sects = sdebug_heads * sdebug_sectors_per; 2671 starts[0] = sdebug_sectors_per; 2672 for (k = 1; k < scsi_debug_num_parts; ++k) 2673 starts[k] = ((k * sectors_per_part) / heads_by_sects) 2674 * heads_by_sects; 2675 starts[scsi_debug_num_parts] = num_sectors; 2676 starts[scsi_debug_num_parts + 1] = 0; 2677 2678 ramp[510] = 0x55; /* magic partition markings */ 2679 ramp[511] = 0xAA; 2680 pp = (struct partition *)(ramp + 0x1be); 2681 for (k = 0; starts[k + 1]; ++k, ++pp) { 2682 start_sec = starts[k]; 2683 end_sec = starts[k + 1] - 1; 2684 pp->boot_ind = 0; 2685 2686 pp->cyl = start_sec / heads_by_sects; 2687 pp->head = (start_sec - (pp->cyl * heads_by_sects)) 2688 / sdebug_sectors_per; 2689 pp->sector = (start_sec % sdebug_sectors_per) + 1; 2690 2691 pp->end_cyl = end_sec / heads_by_sects; 2692 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects)) 2693 / sdebug_sectors_per; 2694 pp->end_sector = (end_sec % sdebug_sectors_per) + 1; 2695 2696 pp->start_sect = start_sec; 2697 pp->nr_sects = end_sec - start_sec + 1; 2698 pp->sys_ind = 0x83; /* plain Linux partition */ 2699 } 2700 } 2701 2702 static int schedule_resp(struct scsi_cmnd * cmnd, 2703 struct sdebug_dev_info * devip, 2704 done_funct_t done, int scsi_result, int delta_jiff) 2705 { 2706 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) { 2707 if (scsi_result) { 2708 struct scsi_device * sdp = cmnd->device; 2709 2710 printk(KERN_INFO "scsi_debug: <%u %u %u %u> " 2711 "non-zero result=0x%x\n", sdp->host->host_no, 2712 sdp->channel, sdp->id, sdp->lun, scsi_result); 2713 } 2714 } 2715 if (cmnd && devip) { 2716 /* simulate autosense by this driver */ 2717 if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff)) 2718 memcpy(cmnd->sense_buffer, devip->sense_buff, 2719 (SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ? 2720 SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE); 2721 } 2722 if (delta_jiff <= 0) { 2723 if (cmnd) 2724 cmnd->result = scsi_result; 2725 if (done) 2726 done(cmnd); 2727 return 0; 2728 } else { 2729 unsigned long iflags; 2730 int k; 2731 struct sdebug_queued_cmd * sqcp = NULL; 2732 2733 spin_lock_irqsave(&queued_arr_lock, iflags); 2734 for (k = 0; k < scsi_debug_max_queue; ++k) { 2735 sqcp = &queued_arr[k]; 2736 if (! sqcp->in_use) 2737 break; 2738 } 2739 if (k >= scsi_debug_max_queue) { 2740 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2741 printk(KERN_WARNING "scsi_debug: can_queue exceeded\n"); 2742 return 1; /* report busy to mid level */ 2743 } 2744 sqcp->in_use = 1; 2745 sqcp->a_cmnd = cmnd; 2746 sqcp->scsi_result = scsi_result; 2747 sqcp->done_funct = done; 2748 sqcp->cmnd_timer.function = timer_intr_handler; 2749 sqcp->cmnd_timer.data = k; 2750 sqcp->cmnd_timer.expires = jiffies + delta_jiff; 2751 add_timer(&sqcp->cmnd_timer); 2752 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2753 if (cmnd) 2754 cmnd->result = 0; 2755 return 0; 2756 } 2757 } 2758 /* Note: The following macros create attribute files in the 2759 /sys/module/scsi_debug/parameters directory. Unfortunately this 2760 driver is unaware of a change and cannot trigger auxiliary actions 2761 as it can when the corresponding attribute in the 2762 /sys/bus/pseudo/drivers/scsi_debug directory is changed. 2763 */ 2764 module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR); 2765 module_param_named(ato, scsi_debug_ato, int, S_IRUGO); 2766 module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR); 2767 module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO); 2768 module_param_named(dif, scsi_debug_dif, int, S_IRUGO); 2769 module_param_named(dix, scsi_debug_dix, int, S_IRUGO); 2770 module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR); 2771 module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR); 2772 module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR); 2773 module_param_named(guard, scsi_debug_guard, int, S_IRUGO); 2774 module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO); 2775 module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO); 2776 module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO); 2777 module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO); 2778 module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO); 2779 module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR); 2780 module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR); 2781 module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR); 2782 module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO); 2783 module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO); 2784 module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR); 2785 module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO); 2786 module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR); 2787 module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO); 2788 module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR); 2789 module_param_named(removable, scsi_debug_removable, bool, S_IRUGO | S_IWUSR); 2790 module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO); 2791 module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO); 2792 module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO); 2793 module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO); 2794 module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO); 2795 module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO); 2796 module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR); 2797 module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int, 2798 S_IRUGO | S_IWUSR); 2799 module_param_named(write_same_length, scsi_debug_write_same_length, int, 2800 S_IRUGO | S_IWUSR); 2801 2802 MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert"); 2803 MODULE_DESCRIPTION("SCSI debug adapter driver"); 2804 MODULE_LICENSE("GPL"); 2805 MODULE_VERSION(SCSI_DEBUG_VERSION); 2806 2807 MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)"); 2808 MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)"); 2809 MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)"); 2810 MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)"); 2811 MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)"); 2812 MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)"); 2813 MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)"); 2814 MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)"); 2815 MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)"); 2816 MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)"); 2817 MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)"); 2818 MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)"); 2819 MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)"); 2820 MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)"); 2821 MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)"); 2822 MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)"); 2823 MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to 255(def))"); 2824 MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)"); 2825 MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))"); 2826 MODULE_PARM_DESC(num_parts, "number of partitions(def=0)"); 2827 MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)"); 2828 MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)"); 2829 MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)"); 2830 MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)"); 2831 MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])"); 2832 MODULE_PARM_DESC(removable, "claim to have removable media (def=0)"); 2833 MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])"); 2834 MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)"); 2835 MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)"); 2836 MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)"); 2837 MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)"); 2838 MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)"); 2839 MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)"); 2840 MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)"); 2841 MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)"); 2842 2843 static char sdebug_info[256]; 2844 2845 static const char * scsi_debug_info(struct Scsi_Host * shp) 2846 { 2847 sprintf(sdebug_info, "scsi_debug, version %s [%s], " 2848 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION, 2849 scsi_debug_version_date, scsi_debug_dev_size_mb, 2850 scsi_debug_opts); 2851 return sdebug_info; 2852 } 2853 2854 /* scsi_debug_proc_info 2855 * Used if the driver currently has no own support for /proc/scsi 2856 */ 2857 static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int length) 2858 { 2859 char arr[16]; 2860 int opts; 2861 int minLen = length > 15 ? 15 : length; 2862 2863 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 2864 return -EACCES; 2865 memcpy(arr, buffer, minLen); 2866 arr[minLen] = '\0'; 2867 if (1 != sscanf(arr, "%d", &opts)) 2868 return -EINVAL; 2869 scsi_debug_opts = opts; 2870 if (scsi_debug_every_nth != 0) 2871 scsi_debug_cmnd_count = 0; 2872 return length; 2873 } 2874 2875 static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host) 2876 { 2877 seq_printf(m, "scsi_debug adapter driver, version " 2878 "%s [%s]\n" 2879 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, " 2880 "every_nth=%d(curr:%d)\n" 2881 "delay=%d, max_luns=%d, scsi_level=%d\n" 2882 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n" 2883 "number of aborts=%d, device_reset=%d, bus_resets=%d, " 2884 "host_resets=%d\ndix_reads=%d dix_writes=%d dif_errors=%d\n", 2885 SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts, 2886 scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth, 2887 scsi_debug_cmnd_count, scsi_debug_delay, 2888 scsi_debug_max_luns, scsi_debug_scsi_level, 2889 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads, 2890 sdebug_sectors_per, num_aborts, num_dev_resets, num_bus_resets, 2891 num_host_resets, dix_reads, dix_writes, dif_errors); 2892 return 0; 2893 } 2894 2895 static ssize_t sdebug_delay_show(struct device_driver * ddp, char * buf) 2896 { 2897 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay); 2898 } 2899 2900 static ssize_t sdebug_delay_store(struct device_driver * ddp, 2901 const char * buf, size_t count) 2902 { 2903 int delay; 2904 char work[20]; 2905 2906 if (1 == sscanf(buf, "%10s", work)) { 2907 if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) { 2908 scsi_debug_delay = delay; 2909 return count; 2910 } 2911 } 2912 return -EINVAL; 2913 } 2914 DRIVER_ATTR(delay, S_IRUGO | S_IWUSR, sdebug_delay_show, 2915 sdebug_delay_store); 2916 2917 static ssize_t sdebug_opts_show(struct device_driver * ddp, char * buf) 2918 { 2919 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts); 2920 } 2921 2922 static ssize_t sdebug_opts_store(struct device_driver * ddp, 2923 const char * buf, size_t count) 2924 { 2925 int opts; 2926 char work[20]; 2927 2928 if (1 == sscanf(buf, "%10s", work)) { 2929 if (0 == strnicmp(work,"0x", 2)) { 2930 if (1 == sscanf(&work[2], "%x", &opts)) 2931 goto opts_done; 2932 } else { 2933 if (1 == sscanf(work, "%d", &opts)) 2934 goto opts_done; 2935 } 2936 } 2937 return -EINVAL; 2938 opts_done: 2939 scsi_debug_opts = opts; 2940 scsi_debug_cmnd_count = 0; 2941 return count; 2942 } 2943 DRIVER_ATTR(opts, S_IRUGO | S_IWUSR, sdebug_opts_show, 2944 sdebug_opts_store); 2945 2946 static ssize_t sdebug_ptype_show(struct device_driver * ddp, char * buf) 2947 { 2948 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype); 2949 } 2950 static ssize_t sdebug_ptype_store(struct device_driver * ddp, 2951 const char * buf, size_t count) 2952 { 2953 int n; 2954 2955 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 2956 scsi_debug_ptype = n; 2957 return count; 2958 } 2959 return -EINVAL; 2960 } 2961 DRIVER_ATTR(ptype, S_IRUGO | S_IWUSR, sdebug_ptype_show, sdebug_ptype_store); 2962 2963 static ssize_t sdebug_dsense_show(struct device_driver * ddp, char * buf) 2964 { 2965 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense); 2966 } 2967 static ssize_t sdebug_dsense_store(struct device_driver * ddp, 2968 const char * buf, size_t count) 2969 { 2970 int n; 2971 2972 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 2973 scsi_debug_dsense = n; 2974 return count; 2975 } 2976 return -EINVAL; 2977 } 2978 DRIVER_ATTR(dsense, S_IRUGO | S_IWUSR, sdebug_dsense_show, 2979 sdebug_dsense_store); 2980 2981 static ssize_t sdebug_fake_rw_show(struct device_driver * ddp, char * buf) 2982 { 2983 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw); 2984 } 2985 static ssize_t sdebug_fake_rw_store(struct device_driver * ddp, 2986 const char * buf, size_t count) 2987 { 2988 int n; 2989 2990 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 2991 scsi_debug_fake_rw = n; 2992 return count; 2993 } 2994 return -EINVAL; 2995 } 2996 DRIVER_ATTR(fake_rw, S_IRUGO | S_IWUSR, sdebug_fake_rw_show, 2997 sdebug_fake_rw_store); 2998 2999 static ssize_t sdebug_no_lun_0_show(struct device_driver * ddp, char * buf) 3000 { 3001 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0); 3002 } 3003 static ssize_t sdebug_no_lun_0_store(struct device_driver * ddp, 3004 const char * buf, size_t count) 3005 { 3006 int n; 3007 3008 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 3009 scsi_debug_no_lun_0 = n; 3010 return count; 3011 } 3012 return -EINVAL; 3013 } 3014 DRIVER_ATTR(no_lun_0, S_IRUGO | S_IWUSR, sdebug_no_lun_0_show, 3015 sdebug_no_lun_0_store); 3016 3017 static ssize_t sdebug_num_tgts_show(struct device_driver * ddp, char * buf) 3018 { 3019 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts); 3020 } 3021 static ssize_t sdebug_num_tgts_store(struct device_driver * ddp, 3022 const char * buf, size_t count) 3023 { 3024 int n; 3025 3026 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 3027 scsi_debug_num_tgts = n; 3028 sdebug_max_tgts_luns(); 3029 return count; 3030 } 3031 return -EINVAL; 3032 } 3033 DRIVER_ATTR(num_tgts, S_IRUGO | S_IWUSR, sdebug_num_tgts_show, 3034 sdebug_num_tgts_store); 3035 3036 static ssize_t sdebug_dev_size_mb_show(struct device_driver * ddp, char * buf) 3037 { 3038 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb); 3039 } 3040 DRIVER_ATTR(dev_size_mb, S_IRUGO, sdebug_dev_size_mb_show, NULL); 3041 3042 static ssize_t sdebug_num_parts_show(struct device_driver * ddp, char * buf) 3043 { 3044 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts); 3045 } 3046 DRIVER_ATTR(num_parts, S_IRUGO, sdebug_num_parts_show, NULL); 3047 3048 static ssize_t sdebug_every_nth_show(struct device_driver * ddp, char * buf) 3049 { 3050 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth); 3051 } 3052 static ssize_t sdebug_every_nth_store(struct device_driver * ddp, 3053 const char * buf, size_t count) 3054 { 3055 int nth; 3056 3057 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) { 3058 scsi_debug_every_nth = nth; 3059 scsi_debug_cmnd_count = 0; 3060 return count; 3061 } 3062 return -EINVAL; 3063 } 3064 DRIVER_ATTR(every_nth, S_IRUGO | S_IWUSR, sdebug_every_nth_show, 3065 sdebug_every_nth_store); 3066 3067 static ssize_t sdebug_max_luns_show(struct device_driver * ddp, char * buf) 3068 { 3069 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns); 3070 } 3071 static ssize_t sdebug_max_luns_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 scsi_debug_max_luns = n; 3078 sdebug_max_tgts_luns(); 3079 return count; 3080 } 3081 return -EINVAL; 3082 } 3083 DRIVER_ATTR(max_luns, S_IRUGO | S_IWUSR, sdebug_max_luns_show, 3084 sdebug_max_luns_store); 3085 3086 static ssize_t sdebug_max_queue_show(struct device_driver * ddp, char * buf) 3087 { 3088 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue); 3089 } 3090 static ssize_t sdebug_max_queue_store(struct device_driver * ddp, 3091 const char * buf, size_t count) 3092 { 3093 int n; 3094 3095 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) && 3096 (n <= SCSI_DEBUG_CANQUEUE)) { 3097 scsi_debug_max_queue = n; 3098 return count; 3099 } 3100 return -EINVAL; 3101 } 3102 DRIVER_ATTR(max_queue, S_IRUGO | S_IWUSR, sdebug_max_queue_show, 3103 sdebug_max_queue_store); 3104 3105 static ssize_t sdebug_no_uld_show(struct device_driver * ddp, char * buf) 3106 { 3107 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld); 3108 } 3109 DRIVER_ATTR(no_uld, S_IRUGO, sdebug_no_uld_show, NULL); 3110 3111 static ssize_t sdebug_scsi_level_show(struct device_driver * ddp, char * buf) 3112 { 3113 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level); 3114 } 3115 DRIVER_ATTR(scsi_level, S_IRUGO, sdebug_scsi_level_show, NULL); 3116 3117 static ssize_t sdebug_virtual_gb_show(struct device_driver * ddp, char * buf) 3118 { 3119 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb); 3120 } 3121 static ssize_t sdebug_virtual_gb_store(struct device_driver * ddp, 3122 const char * buf, size_t count) 3123 { 3124 int n; 3125 3126 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 3127 scsi_debug_virtual_gb = n; 3128 3129 sdebug_capacity = get_sdebug_capacity(); 3130 3131 return count; 3132 } 3133 return -EINVAL; 3134 } 3135 DRIVER_ATTR(virtual_gb, S_IRUGO | S_IWUSR, sdebug_virtual_gb_show, 3136 sdebug_virtual_gb_store); 3137 3138 static ssize_t sdebug_add_host_show(struct device_driver * ddp, char * buf) 3139 { 3140 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host); 3141 } 3142 3143 static ssize_t sdebug_add_host_store(struct device_driver * ddp, 3144 const char * buf, size_t count) 3145 { 3146 int delta_hosts; 3147 3148 if (sscanf(buf, "%d", &delta_hosts) != 1) 3149 return -EINVAL; 3150 if (delta_hosts > 0) { 3151 do { 3152 sdebug_add_adapter(); 3153 } while (--delta_hosts); 3154 } else if (delta_hosts < 0) { 3155 do { 3156 sdebug_remove_adapter(); 3157 } while (++delta_hosts); 3158 } 3159 return count; 3160 } 3161 DRIVER_ATTR(add_host, S_IRUGO | S_IWUSR, sdebug_add_host_show, 3162 sdebug_add_host_store); 3163 3164 static ssize_t sdebug_vpd_use_hostno_show(struct device_driver * ddp, 3165 char * buf) 3166 { 3167 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno); 3168 } 3169 static ssize_t sdebug_vpd_use_hostno_store(struct device_driver * ddp, 3170 const char * buf, size_t count) 3171 { 3172 int n; 3173 3174 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 3175 scsi_debug_vpd_use_hostno = n; 3176 return count; 3177 } 3178 return -EINVAL; 3179 } 3180 DRIVER_ATTR(vpd_use_hostno, S_IRUGO | S_IWUSR, sdebug_vpd_use_hostno_show, 3181 sdebug_vpd_use_hostno_store); 3182 3183 static ssize_t sdebug_sector_size_show(struct device_driver * ddp, char * buf) 3184 { 3185 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size); 3186 } 3187 DRIVER_ATTR(sector_size, S_IRUGO, sdebug_sector_size_show, NULL); 3188 3189 static ssize_t sdebug_dix_show(struct device_driver *ddp, char *buf) 3190 { 3191 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix); 3192 } 3193 DRIVER_ATTR(dix, S_IRUGO, sdebug_dix_show, NULL); 3194 3195 static ssize_t sdebug_dif_show(struct device_driver *ddp, char *buf) 3196 { 3197 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif); 3198 } 3199 DRIVER_ATTR(dif, S_IRUGO, sdebug_dif_show, NULL); 3200 3201 static ssize_t sdebug_guard_show(struct device_driver *ddp, char *buf) 3202 { 3203 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_guard); 3204 } 3205 DRIVER_ATTR(guard, S_IRUGO, sdebug_guard_show, NULL); 3206 3207 static ssize_t sdebug_ato_show(struct device_driver *ddp, char *buf) 3208 { 3209 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato); 3210 } 3211 DRIVER_ATTR(ato, S_IRUGO, sdebug_ato_show, NULL); 3212 3213 static ssize_t sdebug_map_show(struct device_driver *ddp, char *buf) 3214 { 3215 ssize_t count; 3216 3217 if (!scsi_debug_lbp()) 3218 return scnprintf(buf, PAGE_SIZE, "0-%u\n", 3219 sdebug_store_sectors); 3220 3221 count = bitmap_scnlistprintf(buf, PAGE_SIZE, map_storep, map_size); 3222 3223 buf[count++] = '\n'; 3224 buf[count++] = 0; 3225 3226 return count; 3227 } 3228 DRIVER_ATTR(map, S_IRUGO, sdebug_map_show, NULL); 3229 3230 static ssize_t sdebug_removable_show(struct device_driver *ddp, 3231 char *buf) 3232 { 3233 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_removable ? 1 : 0); 3234 } 3235 static ssize_t sdebug_removable_store(struct device_driver *ddp, 3236 const char *buf, size_t count) 3237 { 3238 int n; 3239 3240 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 3241 scsi_debug_removable = (n > 0); 3242 return count; 3243 } 3244 return -EINVAL; 3245 } 3246 DRIVER_ATTR(removable, S_IRUGO | S_IWUSR, sdebug_removable_show, 3247 sdebug_removable_store); 3248 3249 3250 /* Note: The following function creates attribute files in the 3251 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these 3252 files (over those found in the /sys/module/scsi_debug/parameters 3253 directory) is that auxiliary actions can be triggered when an attribute 3254 is changed. For example see: sdebug_add_host_store() above. 3255 */ 3256 static int do_create_driverfs_files(void) 3257 { 3258 int ret; 3259 3260 ret = driver_create_file(&sdebug_driverfs_driver, &driver_attr_add_host); 3261 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay); 3262 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb); 3263 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dsense); 3264 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_every_nth); 3265 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_fake_rw); 3266 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_luns); 3267 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_queue); 3268 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0); 3269 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_uld); 3270 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_parts); 3271 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_tgts); 3272 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ptype); 3273 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_opts); 3274 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_removable); 3275 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level); 3276 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb); 3277 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno); 3278 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_sector_size); 3279 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dix); 3280 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dif); 3281 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_guard); 3282 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ato); 3283 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_map); 3284 return ret; 3285 } 3286 3287 static void do_remove_driverfs_files(void) 3288 { 3289 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_map); 3290 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ato); 3291 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_guard); 3292 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dif); 3293 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dix); 3294 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_sector_size); 3295 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno); 3296 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb); 3297 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level); 3298 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_opts); 3299 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ptype); 3300 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_removable); 3301 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_tgts); 3302 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_parts); 3303 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_uld); 3304 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0); 3305 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_queue); 3306 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_luns); 3307 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_fake_rw); 3308 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_every_nth); 3309 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dsense); 3310 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb); 3311 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay); 3312 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host); 3313 } 3314 3315 struct device *pseudo_primary; 3316 3317 static int __init scsi_debug_init(void) 3318 { 3319 unsigned long sz; 3320 int host_to_add; 3321 int k; 3322 int ret; 3323 3324 switch (scsi_debug_sector_size) { 3325 case 512: 3326 case 1024: 3327 case 2048: 3328 case 4096: 3329 break; 3330 default: 3331 printk(KERN_ERR "scsi_debug_init: invalid sector_size %d\n", 3332 scsi_debug_sector_size); 3333 return -EINVAL; 3334 } 3335 3336 switch (scsi_debug_dif) { 3337 3338 case SD_DIF_TYPE0_PROTECTION: 3339 case SD_DIF_TYPE1_PROTECTION: 3340 case SD_DIF_TYPE2_PROTECTION: 3341 case SD_DIF_TYPE3_PROTECTION: 3342 break; 3343 3344 default: 3345 printk(KERN_ERR "scsi_debug_init: dif must be 0, 1, 2 or 3\n"); 3346 return -EINVAL; 3347 } 3348 3349 if (scsi_debug_guard > 1) { 3350 printk(KERN_ERR "scsi_debug_init: guard must be 0 or 1\n"); 3351 return -EINVAL; 3352 } 3353 3354 if (scsi_debug_ato > 1) { 3355 printk(KERN_ERR "scsi_debug_init: ato must be 0 or 1\n"); 3356 return -EINVAL; 3357 } 3358 3359 if (scsi_debug_physblk_exp > 15) { 3360 printk(KERN_ERR "scsi_debug_init: invalid physblk_exp %u\n", 3361 scsi_debug_physblk_exp); 3362 return -EINVAL; 3363 } 3364 3365 if (scsi_debug_lowest_aligned > 0x3fff) { 3366 printk(KERN_ERR "scsi_debug_init: lowest_aligned too big: %u\n", 3367 scsi_debug_lowest_aligned); 3368 return -EINVAL; 3369 } 3370 3371 if (scsi_debug_dev_size_mb < 1) 3372 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */ 3373 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576; 3374 sdebug_store_sectors = sz / scsi_debug_sector_size; 3375 sdebug_capacity = get_sdebug_capacity(); 3376 3377 /* play around with geometry, don't waste too much on track 0 */ 3378 sdebug_heads = 8; 3379 sdebug_sectors_per = 32; 3380 if (scsi_debug_dev_size_mb >= 16) 3381 sdebug_heads = 32; 3382 else if (scsi_debug_dev_size_mb >= 256) 3383 sdebug_heads = 64; 3384 sdebug_cylinders_per = (unsigned long)sdebug_capacity / 3385 (sdebug_sectors_per * sdebug_heads); 3386 if (sdebug_cylinders_per >= 1024) { 3387 /* other LLDs do this; implies >= 1GB ram disk ... */ 3388 sdebug_heads = 255; 3389 sdebug_sectors_per = 63; 3390 sdebug_cylinders_per = (unsigned long)sdebug_capacity / 3391 (sdebug_sectors_per * sdebug_heads); 3392 } 3393 3394 fake_storep = vmalloc(sz); 3395 if (NULL == fake_storep) { 3396 printk(KERN_ERR "scsi_debug_init: out of memory, 1\n"); 3397 return -ENOMEM; 3398 } 3399 memset(fake_storep, 0, sz); 3400 if (scsi_debug_num_parts > 0) 3401 sdebug_build_parts(fake_storep, sz); 3402 3403 if (scsi_debug_dif) { 3404 int dif_size; 3405 3406 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple); 3407 dif_storep = vmalloc(dif_size); 3408 3409 printk(KERN_ERR "scsi_debug_init: dif_storep %u bytes @ %p\n", 3410 dif_size, dif_storep); 3411 3412 if (dif_storep == NULL) { 3413 printk(KERN_ERR "scsi_debug_init: out of mem. (DIX)\n"); 3414 ret = -ENOMEM; 3415 goto free_vm; 3416 } 3417 3418 memset(dif_storep, 0xff, dif_size); 3419 } 3420 3421 /* Logical Block Provisioning */ 3422 if (scsi_debug_lbp()) { 3423 scsi_debug_unmap_max_blocks = 3424 clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU); 3425 3426 scsi_debug_unmap_max_desc = 3427 clamp(scsi_debug_unmap_max_desc, 0U, 256U); 3428 3429 scsi_debug_unmap_granularity = 3430 clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU); 3431 3432 if (scsi_debug_unmap_alignment && 3433 scsi_debug_unmap_granularity <= 3434 scsi_debug_unmap_alignment) { 3435 printk(KERN_ERR 3436 "%s: ERR: unmap_granularity <= unmap_alignment\n", 3437 __func__); 3438 return -EINVAL; 3439 } 3440 3441 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1; 3442 map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long)); 3443 3444 printk(KERN_INFO "scsi_debug_init: %lu provisioning blocks\n", 3445 map_size); 3446 3447 if (map_storep == NULL) { 3448 printk(KERN_ERR "scsi_debug_init: out of mem. (MAP)\n"); 3449 ret = -ENOMEM; 3450 goto free_vm; 3451 } 3452 3453 bitmap_zero(map_storep, map_size); 3454 3455 /* Map first 1KB for partition table */ 3456 if (scsi_debug_num_parts) 3457 map_region(0, 2); 3458 } 3459 3460 pseudo_primary = root_device_register("pseudo_0"); 3461 if (IS_ERR(pseudo_primary)) { 3462 printk(KERN_WARNING "scsi_debug: root_device_register() error\n"); 3463 ret = PTR_ERR(pseudo_primary); 3464 goto free_vm; 3465 } 3466 ret = bus_register(&pseudo_lld_bus); 3467 if (ret < 0) { 3468 printk(KERN_WARNING "scsi_debug: bus_register error: %d\n", 3469 ret); 3470 goto dev_unreg; 3471 } 3472 ret = driver_register(&sdebug_driverfs_driver); 3473 if (ret < 0) { 3474 printk(KERN_WARNING "scsi_debug: driver_register error: %d\n", 3475 ret); 3476 goto bus_unreg; 3477 } 3478 ret = do_create_driverfs_files(); 3479 if (ret < 0) { 3480 printk(KERN_WARNING "scsi_debug: driver_create_file error: %d\n", 3481 ret); 3482 goto del_files; 3483 } 3484 3485 init_all_queued(); 3486 3487 host_to_add = scsi_debug_add_host; 3488 scsi_debug_add_host = 0; 3489 3490 for (k = 0; k < host_to_add; k++) { 3491 if (sdebug_add_adapter()) { 3492 printk(KERN_ERR "scsi_debug_init: " 3493 "sdebug_add_adapter failed k=%d\n", k); 3494 break; 3495 } 3496 } 3497 3498 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) { 3499 printk(KERN_INFO "scsi_debug_init: built %d host(s)\n", 3500 scsi_debug_add_host); 3501 } 3502 return 0; 3503 3504 del_files: 3505 do_remove_driverfs_files(); 3506 driver_unregister(&sdebug_driverfs_driver); 3507 bus_unreg: 3508 bus_unregister(&pseudo_lld_bus); 3509 dev_unreg: 3510 root_device_unregister(pseudo_primary); 3511 free_vm: 3512 if (map_storep) 3513 vfree(map_storep); 3514 if (dif_storep) 3515 vfree(dif_storep); 3516 vfree(fake_storep); 3517 3518 return ret; 3519 } 3520 3521 static void __exit scsi_debug_exit(void) 3522 { 3523 int k = scsi_debug_add_host; 3524 3525 stop_all_queued(); 3526 for (; k; k--) 3527 sdebug_remove_adapter(); 3528 do_remove_driverfs_files(); 3529 driver_unregister(&sdebug_driverfs_driver); 3530 bus_unregister(&pseudo_lld_bus); 3531 root_device_unregister(pseudo_primary); 3532 3533 if (dif_storep) 3534 vfree(dif_storep); 3535 3536 vfree(fake_storep); 3537 } 3538 3539 device_initcall(scsi_debug_init); 3540 module_exit(scsi_debug_exit); 3541 3542 static void sdebug_release_adapter(struct device * dev) 3543 { 3544 struct sdebug_host_info *sdbg_host; 3545 3546 sdbg_host = to_sdebug_host(dev); 3547 kfree(sdbg_host); 3548 } 3549 3550 static int sdebug_add_adapter(void) 3551 { 3552 int k, devs_per_host; 3553 int error = 0; 3554 struct sdebug_host_info *sdbg_host; 3555 struct sdebug_dev_info *sdbg_devinfo, *tmp; 3556 3557 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL); 3558 if (NULL == sdbg_host) { 3559 printk(KERN_ERR "%s: out of memory at line %d\n", 3560 __func__, __LINE__); 3561 return -ENOMEM; 3562 } 3563 3564 INIT_LIST_HEAD(&sdbg_host->dev_info_list); 3565 3566 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns; 3567 for (k = 0; k < devs_per_host; k++) { 3568 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL); 3569 if (!sdbg_devinfo) { 3570 printk(KERN_ERR "%s: out of memory at line %d\n", 3571 __func__, __LINE__); 3572 error = -ENOMEM; 3573 goto clean; 3574 } 3575 } 3576 3577 spin_lock(&sdebug_host_list_lock); 3578 list_add_tail(&sdbg_host->host_list, &sdebug_host_list); 3579 spin_unlock(&sdebug_host_list_lock); 3580 3581 sdbg_host->dev.bus = &pseudo_lld_bus; 3582 sdbg_host->dev.parent = pseudo_primary; 3583 sdbg_host->dev.release = &sdebug_release_adapter; 3584 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host); 3585 3586 error = device_register(&sdbg_host->dev); 3587 3588 if (error) 3589 goto clean; 3590 3591 ++scsi_debug_add_host; 3592 return error; 3593 3594 clean: 3595 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list, 3596 dev_list) { 3597 list_del(&sdbg_devinfo->dev_list); 3598 kfree(sdbg_devinfo); 3599 } 3600 3601 kfree(sdbg_host); 3602 return error; 3603 } 3604 3605 static void sdebug_remove_adapter(void) 3606 { 3607 struct sdebug_host_info * sdbg_host = NULL; 3608 3609 spin_lock(&sdebug_host_list_lock); 3610 if (!list_empty(&sdebug_host_list)) { 3611 sdbg_host = list_entry(sdebug_host_list.prev, 3612 struct sdebug_host_info, host_list); 3613 list_del(&sdbg_host->host_list); 3614 } 3615 spin_unlock(&sdebug_host_list_lock); 3616 3617 if (!sdbg_host) 3618 return; 3619 3620 device_unregister(&sdbg_host->dev); 3621 --scsi_debug_add_host; 3622 } 3623 3624 static 3625 int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done) 3626 { 3627 unsigned char *cmd = (unsigned char *) SCpnt->cmnd; 3628 int len, k; 3629 unsigned int num; 3630 unsigned long long lba; 3631 u32 ei_lba; 3632 int errsts = 0; 3633 int target = SCpnt->device->id; 3634 struct sdebug_dev_info *devip = NULL; 3635 int inj_recovered = 0; 3636 int inj_transport = 0; 3637 int inj_dif = 0; 3638 int inj_dix = 0; 3639 int delay_override = 0; 3640 int unmap = 0; 3641 3642 scsi_set_resid(SCpnt, 0); 3643 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) { 3644 printk(KERN_INFO "scsi_debug: cmd "); 3645 for (k = 0, len = SCpnt->cmd_len; k < len; ++k) 3646 printk("%02x ", (int)cmd[k]); 3647 printk("\n"); 3648 } 3649 3650 if (target == SCpnt->device->host->hostt->this_id) { 3651 printk(KERN_INFO "scsi_debug: initiator's id used as " 3652 "target!\n"); 3653 return schedule_resp(SCpnt, NULL, done, 3654 DID_NO_CONNECT << 16, 0); 3655 } 3656 3657 if ((SCpnt->device->lun >= scsi_debug_max_luns) && 3658 (SCpnt->device->lun != SAM2_WLUN_REPORT_LUNS)) 3659 return schedule_resp(SCpnt, NULL, done, 3660 DID_NO_CONNECT << 16, 0); 3661 devip = devInfoReg(SCpnt->device); 3662 if (NULL == devip) 3663 return schedule_resp(SCpnt, NULL, done, 3664 DID_NO_CONNECT << 16, 0); 3665 3666 if ((scsi_debug_every_nth != 0) && 3667 (++scsi_debug_cmnd_count >= abs(scsi_debug_every_nth))) { 3668 scsi_debug_cmnd_count = 0; 3669 if (scsi_debug_every_nth < -1) 3670 scsi_debug_every_nth = -1; 3671 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts) 3672 return 0; /* ignore command causing timeout */ 3673 else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts && 3674 scsi_medium_access_command(SCpnt)) 3675 return 0; /* time out reads and writes */ 3676 else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts) 3677 inj_recovered = 1; /* to reads and writes below */ 3678 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & scsi_debug_opts) 3679 inj_transport = 1; /* to reads and writes below */ 3680 else if (SCSI_DEBUG_OPT_DIF_ERR & scsi_debug_opts) 3681 inj_dif = 1; /* to reads and writes below */ 3682 else if (SCSI_DEBUG_OPT_DIX_ERR & scsi_debug_opts) 3683 inj_dix = 1; /* to reads and writes below */ 3684 } 3685 3686 if (devip->wlun) { 3687 switch (*cmd) { 3688 case INQUIRY: 3689 case REQUEST_SENSE: 3690 case TEST_UNIT_READY: 3691 case REPORT_LUNS: 3692 break; /* only allowable wlun commands */ 3693 default: 3694 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 3695 printk(KERN_INFO "scsi_debug: Opcode: 0x%x " 3696 "not supported for wlun\n", *cmd); 3697 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3698 INVALID_OPCODE, 0); 3699 errsts = check_condition_result; 3700 return schedule_resp(SCpnt, devip, done, errsts, 3701 0); 3702 } 3703 } 3704 3705 switch (*cmd) { 3706 case INQUIRY: /* mandatory, ignore unit attention */ 3707 delay_override = 1; 3708 errsts = resp_inquiry(SCpnt, target, devip); 3709 break; 3710 case REQUEST_SENSE: /* mandatory, ignore unit attention */ 3711 delay_override = 1; 3712 errsts = resp_requests(SCpnt, devip); 3713 break; 3714 case REZERO_UNIT: /* actually this is REWIND for SSC */ 3715 case START_STOP: 3716 errsts = resp_start_stop(SCpnt, devip); 3717 break; 3718 case ALLOW_MEDIUM_REMOVAL: 3719 errsts = check_readiness(SCpnt, 1, devip); 3720 if (errsts) 3721 break; 3722 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 3723 printk(KERN_INFO "scsi_debug: Medium removal %s\n", 3724 cmd[4] ? "inhibited" : "enabled"); 3725 break; 3726 case SEND_DIAGNOSTIC: /* mandatory */ 3727 errsts = check_readiness(SCpnt, 1, devip); 3728 break; 3729 case TEST_UNIT_READY: /* mandatory */ 3730 delay_override = 1; 3731 errsts = check_readiness(SCpnt, 0, devip); 3732 break; 3733 case RESERVE: 3734 errsts = check_readiness(SCpnt, 1, devip); 3735 break; 3736 case RESERVE_10: 3737 errsts = check_readiness(SCpnt, 1, devip); 3738 break; 3739 case RELEASE: 3740 errsts = check_readiness(SCpnt, 1, devip); 3741 break; 3742 case RELEASE_10: 3743 errsts = check_readiness(SCpnt, 1, devip); 3744 break; 3745 case READ_CAPACITY: 3746 errsts = resp_readcap(SCpnt, devip); 3747 break; 3748 case SERVICE_ACTION_IN: 3749 if (cmd[1] == SAI_READ_CAPACITY_16) 3750 errsts = resp_readcap16(SCpnt, devip); 3751 else if (cmd[1] == SAI_GET_LBA_STATUS) { 3752 3753 if (scsi_debug_lbp() == 0) { 3754 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3755 INVALID_COMMAND_OPCODE, 0); 3756 errsts = check_condition_result; 3757 } else 3758 errsts = resp_get_lba_status(SCpnt, devip); 3759 } else { 3760 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3761 INVALID_OPCODE, 0); 3762 errsts = check_condition_result; 3763 } 3764 break; 3765 case MAINTENANCE_IN: 3766 if (MI_REPORT_TARGET_PGS != cmd[1]) { 3767 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3768 INVALID_OPCODE, 0); 3769 errsts = check_condition_result; 3770 break; 3771 } 3772 errsts = resp_report_tgtpgs(SCpnt, devip); 3773 break; 3774 case READ_16: 3775 case READ_12: 3776 case READ_10: 3777 /* READ{10,12,16} and DIF Type 2 are natural enemies */ 3778 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && 3779 cmd[1] & 0xe0) { 3780 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3781 INVALID_COMMAND_OPCODE, 0); 3782 errsts = check_condition_result; 3783 break; 3784 } 3785 3786 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION || 3787 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) && 3788 (cmd[1] & 0xe0) == 0) 3789 printk(KERN_ERR "Unprotected RD/WR to DIF device\n"); 3790 3791 /* fall through */ 3792 case READ_6: 3793 read: 3794 errsts = check_readiness(SCpnt, 0, devip); 3795 if (errsts) 3796 break; 3797 if (scsi_debug_fake_rw) 3798 break; 3799 get_data_transfer_info(cmd, &lba, &num, &ei_lba); 3800 errsts = resp_read(SCpnt, lba, num, devip, ei_lba); 3801 if (inj_recovered && (0 == errsts)) { 3802 mk_sense_buffer(devip, RECOVERED_ERROR, 3803 THRESHOLD_EXCEEDED, 0); 3804 errsts = check_condition_result; 3805 } else if (inj_transport && (0 == errsts)) { 3806 mk_sense_buffer(devip, ABORTED_COMMAND, 3807 TRANSPORT_PROBLEM, ACK_NAK_TO); 3808 errsts = check_condition_result; 3809 } else if (inj_dif && (0 == errsts)) { 3810 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1); 3811 errsts = illegal_condition_result; 3812 } else if (inj_dix && (0 == errsts)) { 3813 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1); 3814 errsts = illegal_condition_result; 3815 } 3816 break; 3817 case REPORT_LUNS: /* mandatory, ignore unit attention */ 3818 delay_override = 1; 3819 errsts = resp_report_luns(SCpnt, devip); 3820 break; 3821 case VERIFY: /* 10 byte SBC-2 command */ 3822 errsts = check_readiness(SCpnt, 0, devip); 3823 break; 3824 case WRITE_16: 3825 case WRITE_12: 3826 case WRITE_10: 3827 /* WRITE{10,12,16} and DIF Type 2 are natural enemies */ 3828 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && 3829 cmd[1] & 0xe0) { 3830 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3831 INVALID_COMMAND_OPCODE, 0); 3832 errsts = check_condition_result; 3833 break; 3834 } 3835 3836 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION || 3837 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) && 3838 (cmd[1] & 0xe0) == 0) 3839 printk(KERN_ERR "Unprotected RD/WR to DIF device\n"); 3840 3841 /* fall through */ 3842 case WRITE_6: 3843 write: 3844 errsts = check_readiness(SCpnt, 0, devip); 3845 if (errsts) 3846 break; 3847 if (scsi_debug_fake_rw) 3848 break; 3849 get_data_transfer_info(cmd, &lba, &num, &ei_lba); 3850 errsts = resp_write(SCpnt, lba, num, devip, ei_lba); 3851 if (inj_recovered && (0 == errsts)) { 3852 mk_sense_buffer(devip, RECOVERED_ERROR, 3853 THRESHOLD_EXCEEDED, 0); 3854 errsts = check_condition_result; 3855 } else if (inj_dif && (0 == errsts)) { 3856 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1); 3857 errsts = illegal_condition_result; 3858 } else if (inj_dix && (0 == errsts)) { 3859 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1); 3860 errsts = illegal_condition_result; 3861 } 3862 break; 3863 case WRITE_SAME_16: 3864 case WRITE_SAME: 3865 if (cmd[1] & 0x8) { 3866 if ((*cmd == WRITE_SAME_16 && scsi_debug_lbpws == 0) || 3867 (*cmd == WRITE_SAME && scsi_debug_lbpws10 == 0)) { 3868 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3869 INVALID_FIELD_IN_CDB, 0); 3870 errsts = check_condition_result; 3871 } else 3872 unmap = 1; 3873 } 3874 if (errsts) 3875 break; 3876 errsts = check_readiness(SCpnt, 0, devip); 3877 if (errsts) 3878 break; 3879 get_data_transfer_info(cmd, &lba, &num, &ei_lba); 3880 errsts = resp_write_same(SCpnt, lba, num, devip, ei_lba, unmap); 3881 break; 3882 case UNMAP: 3883 errsts = check_readiness(SCpnt, 0, devip); 3884 if (errsts) 3885 break; 3886 3887 if (scsi_debug_unmap_max_desc == 0 || scsi_debug_lbpu == 0) { 3888 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3889 INVALID_COMMAND_OPCODE, 0); 3890 errsts = check_condition_result; 3891 } else 3892 errsts = resp_unmap(SCpnt, devip); 3893 break; 3894 case MODE_SENSE: 3895 case MODE_SENSE_10: 3896 errsts = resp_mode_sense(SCpnt, target, devip); 3897 break; 3898 case MODE_SELECT: 3899 errsts = resp_mode_select(SCpnt, 1, devip); 3900 break; 3901 case MODE_SELECT_10: 3902 errsts = resp_mode_select(SCpnt, 0, devip); 3903 break; 3904 case LOG_SENSE: 3905 errsts = resp_log_sense(SCpnt, devip); 3906 break; 3907 case SYNCHRONIZE_CACHE: 3908 delay_override = 1; 3909 errsts = check_readiness(SCpnt, 0, devip); 3910 break; 3911 case WRITE_BUFFER: 3912 errsts = check_readiness(SCpnt, 1, devip); 3913 break; 3914 case XDWRITEREAD_10: 3915 if (!scsi_bidi_cmnd(SCpnt)) { 3916 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3917 INVALID_FIELD_IN_CDB, 0); 3918 errsts = check_condition_result; 3919 break; 3920 } 3921 3922 errsts = check_readiness(SCpnt, 0, devip); 3923 if (errsts) 3924 break; 3925 if (scsi_debug_fake_rw) 3926 break; 3927 get_data_transfer_info(cmd, &lba, &num, &ei_lba); 3928 errsts = resp_read(SCpnt, lba, num, devip, ei_lba); 3929 if (errsts) 3930 break; 3931 errsts = resp_write(SCpnt, lba, num, devip, ei_lba); 3932 if (errsts) 3933 break; 3934 errsts = resp_xdwriteread(SCpnt, lba, num, devip); 3935 break; 3936 case VARIABLE_LENGTH_CMD: 3937 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION) { 3938 3939 if ((cmd[10] & 0xe0) == 0) 3940 printk(KERN_ERR 3941 "Unprotected RD/WR to DIF device\n"); 3942 3943 if (cmd[9] == READ_32) { 3944 BUG_ON(SCpnt->cmd_len < 32); 3945 goto read; 3946 } 3947 3948 if (cmd[9] == WRITE_32) { 3949 BUG_ON(SCpnt->cmd_len < 32); 3950 goto write; 3951 } 3952 } 3953 3954 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3955 INVALID_FIELD_IN_CDB, 0); 3956 errsts = check_condition_result; 3957 break; 3958 3959 default: 3960 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 3961 printk(KERN_INFO "scsi_debug: Opcode: 0x%x not " 3962 "supported\n", *cmd); 3963 errsts = check_readiness(SCpnt, 1, devip); 3964 if (errsts) 3965 break; /* Unit attention takes precedence */ 3966 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0); 3967 errsts = check_condition_result; 3968 break; 3969 } 3970 return schedule_resp(SCpnt, devip, done, errsts, 3971 (delay_override ? 0 : scsi_debug_delay)); 3972 } 3973 3974 static DEF_SCSI_QCMD(scsi_debug_queuecommand) 3975 3976 static struct scsi_host_template sdebug_driver_template = { 3977 .show_info = scsi_debug_show_info, 3978 .write_info = scsi_debug_write_info, 3979 .proc_name = sdebug_proc_name, 3980 .name = "SCSI DEBUG", 3981 .info = scsi_debug_info, 3982 .slave_alloc = scsi_debug_slave_alloc, 3983 .slave_configure = scsi_debug_slave_configure, 3984 .slave_destroy = scsi_debug_slave_destroy, 3985 .ioctl = scsi_debug_ioctl, 3986 .queuecommand = scsi_debug_queuecommand, 3987 .eh_abort_handler = scsi_debug_abort, 3988 .eh_bus_reset_handler = scsi_debug_bus_reset, 3989 .eh_device_reset_handler = scsi_debug_device_reset, 3990 .eh_host_reset_handler = scsi_debug_host_reset, 3991 .bios_param = scsi_debug_biosparam, 3992 .can_queue = SCSI_DEBUG_CANQUEUE, 3993 .this_id = 7, 3994 .sg_tablesize = 256, 3995 .cmd_per_lun = 16, 3996 .max_sectors = 0xffff, 3997 .use_clustering = DISABLE_CLUSTERING, 3998 .module = THIS_MODULE, 3999 }; 4000 4001 static int sdebug_driver_probe(struct device * dev) 4002 { 4003 int error = 0; 4004 struct sdebug_host_info *sdbg_host; 4005 struct Scsi_Host *hpnt; 4006 int host_prot; 4007 4008 sdbg_host = to_sdebug_host(dev); 4009 4010 sdebug_driver_template.can_queue = scsi_debug_max_queue; 4011 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host)); 4012 if (NULL == hpnt) { 4013 printk(KERN_ERR "%s: scsi_register failed\n", __func__); 4014 error = -ENODEV; 4015 return error; 4016 } 4017 4018 sdbg_host->shost = hpnt; 4019 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host; 4020 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id)) 4021 hpnt->max_id = scsi_debug_num_tgts + 1; 4022 else 4023 hpnt->max_id = scsi_debug_num_tgts; 4024 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */ 4025 4026 host_prot = 0; 4027 4028 switch (scsi_debug_dif) { 4029 4030 case SD_DIF_TYPE1_PROTECTION: 4031 host_prot = SHOST_DIF_TYPE1_PROTECTION; 4032 if (scsi_debug_dix) 4033 host_prot |= SHOST_DIX_TYPE1_PROTECTION; 4034 break; 4035 4036 case SD_DIF_TYPE2_PROTECTION: 4037 host_prot = SHOST_DIF_TYPE2_PROTECTION; 4038 if (scsi_debug_dix) 4039 host_prot |= SHOST_DIX_TYPE2_PROTECTION; 4040 break; 4041 4042 case SD_DIF_TYPE3_PROTECTION: 4043 host_prot = SHOST_DIF_TYPE3_PROTECTION; 4044 if (scsi_debug_dix) 4045 host_prot |= SHOST_DIX_TYPE3_PROTECTION; 4046 break; 4047 4048 default: 4049 if (scsi_debug_dix) 4050 host_prot |= SHOST_DIX_TYPE0_PROTECTION; 4051 break; 4052 } 4053 4054 scsi_host_set_prot(hpnt, host_prot); 4055 4056 printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n", 4057 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "", 4058 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "", 4059 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "", 4060 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "", 4061 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "", 4062 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "", 4063 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : ""); 4064 4065 if (scsi_debug_guard == 1) 4066 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP); 4067 else 4068 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC); 4069 4070 error = scsi_add_host(hpnt, &sdbg_host->dev); 4071 if (error) { 4072 printk(KERN_ERR "%s: scsi_add_host failed\n", __func__); 4073 error = -ENODEV; 4074 scsi_host_put(hpnt); 4075 } else 4076 scsi_scan_host(hpnt); 4077 4078 4079 return error; 4080 } 4081 4082 static int sdebug_driver_remove(struct device * dev) 4083 { 4084 struct sdebug_host_info *sdbg_host; 4085 struct sdebug_dev_info *sdbg_devinfo, *tmp; 4086 4087 sdbg_host = to_sdebug_host(dev); 4088 4089 if (!sdbg_host) { 4090 printk(KERN_ERR "%s: Unable to locate host info\n", 4091 __func__); 4092 return -ENODEV; 4093 } 4094 4095 scsi_remove_host(sdbg_host->shost); 4096 4097 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list, 4098 dev_list) { 4099 list_del(&sdbg_devinfo->dev_list); 4100 kfree(sdbg_devinfo); 4101 } 4102 4103 scsi_host_put(sdbg_host->shost); 4104 return 0; 4105 } 4106 4107 static int pseudo_lld_bus_match(struct device *dev, 4108 struct device_driver *dev_driver) 4109 { 4110 return 1; 4111 } 4112 4113 static struct bus_type pseudo_lld_bus = { 4114 .name = "pseudo", 4115 .match = pseudo_lld_bus_match, 4116 .probe = sdebug_driver_probe, 4117 .remove = sdebug_driver_remove, 4118 }; 4119