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_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */ 113 #define DEF_SECTOR_SIZE 512 114 #define DEF_UNMAP_ALIGNMENT 0 115 #define DEF_UNMAP_GRANULARITY 1 116 #define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF 117 #define DEF_UNMAP_MAX_DESC 256 118 #define DEF_VIRTUAL_GB 0 119 #define DEF_VPD_USE_HOSTNO 1 120 #define DEF_WRITESAME_LENGTH 0xFFFF 121 122 /* bit mask values for scsi_debug_opts */ 123 #define SCSI_DEBUG_OPT_NOISE 1 124 #define SCSI_DEBUG_OPT_MEDIUM_ERR 2 125 #define SCSI_DEBUG_OPT_TIMEOUT 4 126 #define SCSI_DEBUG_OPT_RECOVERED_ERR 8 127 #define SCSI_DEBUG_OPT_TRANSPORT_ERR 16 128 #define SCSI_DEBUG_OPT_DIF_ERR 32 129 #define SCSI_DEBUG_OPT_DIX_ERR 64 130 #define SCSI_DEBUG_OPT_MAC_TIMEOUT 128 131 /* When "every_nth" > 0 then modulo "every_nth" commands: 132 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set 133 * - a RECOVERED_ERROR is simulated on successful read and write 134 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set. 135 * - a TRANSPORT_ERROR is simulated on successful read and write 136 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set. 137 * 138 * When "every_nth" < 0 then after "- every_nth" commands: 139 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set 140 * - a RECOVERED_ERROR is simulated on successful read and write 141 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set. 142 * - a TRANSPORT_ERROR is simulated on successful read and write 143 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set. 144 * This will continue until some other action occurs (e.g. the user 145 * writing a new value (other than -1 or 1) to every_nth via sysfs). 146 */ 147 148 /* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this 149 * sector on read commands: */ 150 #define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */ 151 #define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */ 152 153 /* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1) 154 * or "peripheral device" addressing (value 0) */ 155 #define SAM2_LUN_ADDRESS_METHOD 0 156 #define SAM2_WLUN_REPORT_LUNS 0xc101 157 158 /* Can queue up to this number of commands. Typically commands that 159 * that have a non-zero delay are queued. */ 160 #define SCSI_DEBUG_CANQUEUE 255 161 162 static int scsi_debug_add_host = DEF_NUM_HOST; 163 static int scsi_debug_ato = DEF_ATO; 164 static int scsi_debug_delay = DEF_DELAY; 165 static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB; 166 static int scsi_debug_dif = DEF_DIF; 167 static int scsi_debug_dix = DEF_DIX; 168 static int scsi_debug_dsense = DEF_D_SENSE; 169 static int scsi_debug_every_nth = DEF_EVERY_NTH; 170 static int scsi_debug_fake_rw = DEF_FAKE_RW; 171 static int scsi_debug_guard = DEF_GUARD; 172 static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED; 173 static int scsi_debug_max_luns = DEF_MAX_LUNS; 174 static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE; 175 static int scsi_debug_no_lun_0 = DEF_NO_LUN_0; 176 static int scsi_debug_no_uld = 0; 177 static int scsi_debug_num_parts = DEF_NUM_PARTS; 178 static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */ 179 static int scsi_debug_opt_blks = DEF_OPT_BLKS; 180 static int scsi_debug_opts = DEF_OPTS; 181 static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP; 182 static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */ 183 static int scsi_debug_scsi_level = DEF_SCSI_LEVEL; 184 static int scsi_debug_sector_size = DEF_SECTOR_SIZE; 185 static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB; 186 static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO; 187 static unsigned int scsi_debug_lbpu = DEF_LBPU; 188 static unsigned int scsi_debug_lbpws = DEF_LBPWS; 189 static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10; 190 static unsigned int scsi_debug_lbprz = DEF_LBPRZ; 191 static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT; 192 static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY; 193 static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS; 194 static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC; 195 static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH; 196 197 static int scsi_debug_cmnd_count = 0; 198 199 #define DEV_READONLY(TGT) (0) 200 #define DEV_REMOVEABLE(TGT) (0) 201 202 static unsigned int sdebug_store_sectors; 203 static sector_t sdebug_capacity; /* in sectors */ 204 205 /* old BIOS stuff, kernel may get rid of them but some mode sense pages 206 may still need them */ 207 static int sdebug_heads; /* heads per disk */ 208 static int sdebug_cylinders_per; /* cylinders per surface */ 209 static int sdebug_sectors_per; /* sectors per cylinder */ 210 211 #define SDEBUG_MAX_PARTS 4 212 213 #define SDEBUG_SENSE_LEN 32 214 215 #define SCSI_DEBUG_MAX_CMD_LEN 32 216 217 static unsigned int scsi_debug_lbp(void) 218 { 219 return scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10; 220 } 221 222 struct sdebug_dev_info { 223 struct list_head dev_list; 224 unsigned char sense_buff[SDEBUG_SENSE_LEN]; /* weak nexus */ 225 unsigned int channel; 226 unsigned int target; 227 unsigned int lun; 228 struct sdebug_host_info *sdbg_host; 229 unsigned int wlun; 230 char reset; 231 char stopped; 232 char used; 233 }; 234 235 struct sdebug_host_info { 236 struct list_head host_list; 237 struct Scsi_Host *shost; 238 struct device dev; 239 struct list_head dev_info_list; 240 }; 241 242 #define to_sdebug_host(d) \ 243 container_of(d, struct sdebug_host_info, dev) 244 245 static LIST_HEAD(sdebug_host_list); 246 static DEFINE_SPINLOCK(sdebug_host_list_lock); 247 248 typedef void (* done_funct_t) (struct scsi_cmnd *); 249 250 struct sdebug_queued_cmd { 251 int in_use; 252 struct timer_list cmnd_timer; 253 done_funct_t done_funct; 254 struct scsi_cmnd * a_cmnd; 255 int scsi_result; 256 }; 257 static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE]; 258 259 static unsigned char * fake_storep; /* ramdisk storage */ 260 static unsigned char *dif_storep; /* protection info */ 261 static void *map_storep; /* provisioning map */ 262 263 static unsigned long map_size; 264 static int num_aborts = 0; 265 static int num_dev_resets = 0; 266 static int num_bus_resets = 0; 267 static int num_host_resets = 0; 268 static int dix_writes; 269 static int dix_reads; 270 static int dif_errors; 271 272 static DEFINE_SPINLOCK(queued_arr_lock); 273 static DEFINE_RWLOCK(atomic_rw); 274 275 static char sdebug_proc_name[] = "scsi_debug"; 276 277 static struct bus_type pseudo_lld_bus; 278 279 static inline sector_t dif_offset(sector_t sector) 280 { 281 return sector << 3; 282 } 283 284 static struct device_driver sdebug_driverfs_driver = { 285 .name = sdebug_proc_name, 286 .bus = &pseudo_lld_bus, 287 }; 288 289 static const int check_condition_result = 290 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 291 292 static const int illegal_condition_result = 293 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION; 294 295 static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, 296 0, 0, 0x2, 0x4b}; 297 static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, 298 0, 0, 0x0, 0x0}; 299 300 static int sdebug_add_adapter(void); 301 static void sdebug_remove_adapter(void); 302 303 static void sdebug_max_tgts_luns(void) 304 { 305 struct sdebug_host_info *sdbg_host; 306 struct Scsi_Host *hpnt; 307 308 spin_lock(&sdebug_host_list_lock); 309 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { 310 hpnt = sdbg_host->shost; 311 if ((hpnt->this_id >= 0) && 312 (scsi_debug_num_tgts > hpnt->this_id)) 313 hpnt->max_id = scsi_debug_num_tgts + 1; 314 else 315 hpnt->max_id = scsi_debug_num_tgts; 316 /* scsi_debug_max_luns; */ 317 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; 318 } 319 spin_unlock(&sdebug_host_list_lock); 320 } 321 322 static void mk_sense_buffer(struct sdebug_dev_info *devip, int key, 323 int asc, int asq) 324 { 325 unsigned char *sbuff; 326 327 sbuff = devip->sense_buff; 328 memset(sbuff, 0, SDEBUG_SENSE_LEN); 329 330 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq); 331 332 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 333 printk(KERN_INFO "scsi_debug: [sense_key,asc,ascq]: " 334 "[0x%x,0x%x,0x%x]\n", key, asc, asq); 335 } 336 337 static void get_data_transfer_info(unsigned char *cmd, 338 unsigned long long *lba, unsigned int *num, 339 u32 *ei_lba) 340 { 341 *ei_lba = 0; 342 343 switch (*cmd) { 344 case VARIABLE_LENGTH_CMD: 345 *lba = (u64)cmd[19] | (u64)cmd[18] << 8 | 346 (u64)cmd[17] << 16 | (u64)cmd[16] << 24 | 347 (u64)cmd[15] << 32 | (u64)cmd[14] << 40 | 348 (u64)cmd[13] << 48 | (u64)cmd[12] << 56; 349 350 *ei_lba = (u32)cmd[23] | (u32)cmd[22] << 8 | 351 (u32)cmd[21] << 16 | (u32)cmd[20] << 24; 352 353 *num = (u32)cmd[31] | (u32)cmd[30] << 8 | (u32)cmd[29] << 16 | 354 (u32)cmd[28] << 24; 355 break; 356 357 case WRITE_SAME_16: 358 case WRITE_16: 359 case READ_16: 360 *lba = (u64)cmd[9] | (u64)cmd[8] << 8 | 361 (u64)cmd[7] << 16 | (u64)cmd[6] << 24 | 362 (u64)cmd[5] << 32 | (u64)cmd[4] << 40 | 363 (u64)cmd[3] << 48 | (u64)cmd[2] << 56; 364 365 *num = (u32)cmd[13] | (u32)cmd[12] << 8 | (u32)cmd[11] << 16 | 366 (u32)cmd[10] << 24; 367 break; 368 case WRITE_12: 369 case READ_12: 370 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 | 371 (u32)cmd[2] << 24; 372 373 *num = (u32)cmd[9] | (u32)cmd[8] << 8 | (u32)cmd[7] << 16 | 374 (u32)cmd[6] << 24; 375 break; 376 case WRITE_SAME: 377 case WRITE_10: 378 case READ_10: 379 case XDWRITEREAD_10: 380 *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 | 381 (u32)cmd[2] << 24; 382 383 *num = (u32)cmd[8] | (u32)cmd[7] << 8; 384 break; 385 case WRITE_6: 386 case READ_6: 387 *lba = (u32)cmd[3] | (u32)cmd[2] << 8 | 388 (u32)(cmd[1] & 0x1f) << 16; 389 *num = (0 == cmd[4]) ? 256 : cmd[4]; 390 break; 391 default: 392 break; 393 } 394 } 395 396 static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg) 397 { 398 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) { 399 printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd); 400 } 401 return -EINVAL; 402 /* return -ENOTTY; // correct return but upsets fdisk */ 403 } 404 405 static int check_readiness(struct scsi_cmnd * SCpnt, int reset_only, 406 struct sdebug_dev_info * devip) 407 { 408 if (devip->reset) { 409 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 410 printk(KERN_INFO "scsi_debug: Reporting Unit " 411 "attention: power on reset\n"); 412 devip->reset = 0; 413 mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0); 414 return check_condition_result; 415 } 416 if ((0 == reset_only) && devip->stopped) { 417 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 418 printk(KERN_INFO "scsi_debug: Reporting Not " 419 "ready: initializing command required\n"); 420 mk_sense_buffer(devip, NOT_READY, LOGICAL_UNIT_NOT_READY, 421 0x2); 422 return check_condition_result; 423 } 424 return 0; 425 } 426 427 /* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */ 428 static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr, 429 int arr_len) 430 { 431 int act_len; 432 struct scsi_data_buffer *sdb = scsi_in(scp); 433 434 if (!sdb->length) 435 return 0; 436 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE)) 437 return (DID_ERROR << 16); 438 439 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents, 440 arr, arr_len); 441 if (sdb->resid) 442 sdb->resid -= act_len; 443 else 444 sdb->resid = scsi_bufflen(scp) - act_len; 445 446 return 0; 447 } 448 449 /* Returns number of bytes fetched into 'arr' or -1 if error. */ 450 static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr, 451 int arr_len) 452 { 453 if (!scsi_bufflen(scp)) 454 return 0; 455 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE)) 456 return -1; 457 458 return scsi_sg_copy_to_buffer(scp, arr, arr_len); 459 } 460 461 462 static const char * inq_vendor_id = "Linux "; 463 static const char * inq_product_id = "scsi_debug "; 464 static const char * inq_product_rev = "0004"; 465 466 static int inquiry_evpd_83(unsigned char * arr, int port_group_id, 467 int target_dev_id, int dev_id_num, 468 const char * dev_id_str, 469 int dev_id_str_len) 470 { 471 int num, port_a; 472 char b[32]; 473 474 port_a = target_dev_id + 1; 475 /* T10 vendor identifier field format (faked) */ 476 arr[0] = 0x2; /* ASCII */ 477 arr[1] = 0x1; 478 arr[2] = 0x0; 479 memcpy(&arr[4], inq_vendor_id, 8); 480 memcpy(&arr[12], inq_product_id, 16); 481 memcpy(&arr[28], dev_id_str, dev_id_str_len); 482 num = 8 + 16 + dev_id_str_len; 483 arr[3] = num; 484 num += 4; 485 if (dev_id_num >= 0) { 486 /* NAA-5, Logical unit identifier (binary) */ 487 arr[num++] = 0x1; /* binary (not necessarily sas) */ 488 arr[num++] = 0x3; /* PIV=0, lu, naa */ 489 arr[num++] = 0x0; 490 arr[num++] = 0x8; 491 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */ 492 arr[num++] = 0x33; 493 arr[num++] = 0x33; 494 arr[num++] = 0x30; 495 arr[num++] = (dev_id_num >> 24); 496 arr[num++] = (dev_id_num >> 16) & 0xff; 497 arr[num++] = (dev_id_num >> 8) & 0xff; 498 arr[num++] = dev_id_num & 0xff; 499 /* Target relative port number */ 500 arr[num++] = 0x61; /* proto=sas, binary */ 501 arr[num++] = 0x94; /* PIV=1, target port, rel port */ 502 arr[num++] = 0x0; /* reserved */ 503 arr[num++] = 0x4; /* length */ 504 arr[num++] = 0x0; /* reserved */ 505 arr[num++] = 0x0; /* reserved */ 506 arr[num++] = 0x0; 507 arr[num++] = 0x1; /* relative port A */ 508 } 509 /* NAA-5, Target port identifier */ 510 arr[num++] = 0x61; /* proto=sas, binary */ 511 arr[num++] = 0x93; /* piv=1, target port, naa */ 512 arr[num++] = 0x0; 513 arr[num++] = 0x8; 514 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */ 515 arr[num++] = 0x22; 516 arr[num++] = 0x22; 517 arr[num++] = 0x20; 518 arr[num++] = (port_a >> 24); 519 arr[num++] = (port_a >> 16) & 0xff; 520 arr[num++] = (port_a >> 8) & 0xff; 521 arr[num++] = port_a & 0xff; 522 /* NAA-5, Target port group identifier */ 523 arr[num++] = 0x61; /* proto=sas, binary */ 524 arr[num++] = 0x95; /* piv=1, target port group id */ 525 arr[num++] = 0x0; 526 arr[num++] = 0x4; 527 arr[num++] = 0; 528 arr[num++] = 0; 529 arr[num++] = (port_group_id >> 8) & 0xff; 530 arr[num++] = port_group_id & 0xff; 531 /* NAA-5, Target device identifier */ 532 arr[num++] = 0x61; /* proto=sas, binary */ 533 arr[num++] = 0xa3; /* piv=1, target device, naa */ 534 arr[num++] = 0x0; 535 arr[num++] = 0x8; 536 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */ 537 arr[num++] = 0x22; 538 arr[num++] = 0x22; 539 arr[num++] = 0x20; 540 arr[num++] = (target_dev_id >> 24); 541 arr[num++] = (target_dev_id >> 16) & 0xff; 542 arr[num++] = (target_dev_id >> 8) & 0xff; 543 arr[num++] = target_dev_id & 0xff; 544 /* SCSI name string: Target device identifier */ 545 arr[num++] = 0x63; /* proto=sas, UTF-8 */ 546 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */ 547 arr[num++] = 0x0; 548 arr[num++] = 24; 549 memcpy(arr + num, "naa.52222220", 12); 550 num += 12; 551 snprintf(b, sizeof(b), "%08X", target_dev_id); 552 memcpy(arr + num, b, 8); 553 num += 8; 554 memset(arr + num, 0, 4); 555 num += 4; 556 return num; 557 } 558 559 560 static unsigned char vpd84_data[] = { 561 /* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0, 562 0x22,0x22,0x22,0x0,0xbb,0x1, 563 0x22,0x22,0x22,0x0,0xbb,0x2, 564 }; 565 566 static int inquiry_evpd_84(unsigned char * arr) 567 { 568 memcpy(arr, vpd84_data, sizeof(vpd84_data)); 569 return sizeof(vpd84_data); 570 } 571 572 static int inquiry_evpd_85(unsigned char * arr) 573 { 574 int num = 0; 575 const char * na1 = "https://www.kernel.org/config"; 576 const char * na2 = "http://www.kernel.org/log"; 577 int plen, olen; 578 579 arr[num++] = 0x1; /* lu, storage config */ 580 arr[num++] = 0x0; /* reserved */ 581 arr[num++] = 0x0; 582 olen = strlen(na1); 583 plen = olen + 1; 584 if (plen % 4) 585 plen = ((plen / 4) + 1) * 4; 586 arr[num++] = plen; /* length, null termianted, padded */ 587 memcpy(arr + num, na1, olen); 588 memset(arr + num + olen, 0, plen - olen); 589 num += plen; 590 591 arr[num++] = 0x4; /* lu, logging */ 592 arr[num++] = 0x0; /* reserved */ 593 arr[num++] = 0x0; 594 olen = strlen(na2); 595 plen = olen + 1; 596 if (plen % 4) 597 plen = ((plen / 4) + 1) * 4; 598 arr[num++] = plen; /* length, null terminated, padded */ 599 memcpy(arr + num, na2, olen); 600 memset(arr + num + olen, 0, plen - olen); 601 num += plen; 602 603 return num; 604 } 605 606 /* SCSI ports VPD page */ 607 static int inquiry_evpd_88(unsigned char * arr, int target_dev_id) 608 { 609 int num = 0; 610 int port_a, port_b; 611 612 port_a = target_dev_id + 1; 613 port_b = port_a + 1; 614 arr[num++] = 0x0; /* reserved */ 615 arr[num++] = 0x0; /* reserved */ 616 arr[num++] = 0x0; 617 arr[num++] = 0x1; /* relative port 1 (primary) */ 618 memset(arr + num, 0, 6); 619 num += 6; 620 arr[num++] = 0x0; 621 arr[num++] = 12; /* length tp descriptor */ 622 /* naa-5 target port identifier (A) */ 623 arr[num++] = 0x61; /* proto=sas, binary */ 624 arr[num++] = 0x93; /* PIV=1, target port, NAA */ 625 arr[num++] = 0x0; /* reserved */ 626 arr[num++] = 0x8; /* length */ 627 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */ 628 arr[num++] = 0x22; 629 arr[num++] = 0x22; 630 arr[num++] = 0x20; 631 arr[num++] = (port_a >> 24); 632 arr[num++] = (port_a >> 16) & 0xff; 633 arr[num++] = (port_a >> 8) & 0xff; 634 arr[num++] = port_a & 0xff; 635 636 arr[num++] = 0x0; /* reserved */ 637 arr[num++] = 0x0; /* reserved */ 638 arr[num++] = 0x0; 639 arr[num++] = 0x2; /* relative port 2 (secondary) */ 640 memset(arr + num, 0, 6); 641 num += 6; 642 arr[num++] = 0x0; 643 arr[num++] = 12; /* length tp descriptor */ 644 /* naa-5 target port identifier (B) */ 645 arr[num++] = 0x61; /* proto=sas, binary */ 646 arr[num++] = 0x93; /* PIV=1, target port, NAA */ 647 arr[num++] = 0x0; /* reserved */ 648 arr[num++] = 0x8; /* length */ 649 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */ 650 arr[num++] = 0x22; 651 arr[num++] = 0x22; 652 arr[num++] = 0x20; 653 arr[num++] = (port_b >> 24); 654 arr[num++] = (port_b >> 16) & 0xff; 655 arr[num++] = (port_b >> 8) & 0xff; 656 arr[num++] = port_b & 0xff; 657 658 return num; 659 } 660 661 662 static unsigned char vpd89_data[] = { 663 /* from 4th byte */ 0,0,0,0, 664 'l','i','n','u','x',' ',' ',' ', 665 'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ', 666 '1','2','3','4', 667 0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0, 668 0xec,0,0,0, 669 0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0, 670 0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20, 671 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33, 672 0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31, 673 0x53,0x41, 674 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 675 0x20,0x20, 676 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 677 0x10,0x80, 678 0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0, 679 0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0, 680 0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0, 681 0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0, 682 0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40, 683 0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0, 684 0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0, 685 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 686 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 687 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 688 0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42, 689 0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8, 690 0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe, 691 0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,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 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 702 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 703 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51, 704 }; 705 706 static int inquiry_evpd_89(unsigned char * arr) 707 { 708 memcpy(arr, vpd89_data, sizeof(vpd89_data)); 709 return sizeof(vpd89_data); 710 } 711 712 713 /* Block limits VPD page (SBC-3) */ 714 static unsigned char vpdb0_data[] = { 715 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64, 716 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 717 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 718 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 719 }; 720 721 static int inquiry_evpd_b0(unsigned char * arr) 722 { 723 unsigned int gran; 724 725 memcpy(arr, vpdb0_data, sizeof(vpdb0_data)); 726 727 /* Optimal transfer length granularity */ 728 gran = 1 << scsi_debug_physblk_exp; 729 arr[2] = (gran >> 8) & 0xff; 730 arr[3] = gran & 0xff; 731 732 /* Maximum Transfer Length */ 733 if (sdebug_store_sectors > 0x400) { 734 arr[4] = (sdebug_store_sectors >> 24) & 0xff; 735 arr[5] = (sdebug_store_sectors >> 16) & 0xff; 736 arr[6] = (sdebug_store_sectors >> 8) & 0xff; 737 arr[7] = sdebug_store_sectors & 0xff; 738 } 739 740 /* Optimal Transfer Length */ 741 put_unaligned_be32(scsi_debug_opt_blks, &arr[8]); 742 743 if (scsi_debug_lbpu) { 744 /* Maximum Unmap LBA Count */ 745 put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]); 746 747 /* Maximum Unmap Block Descriptor Count */ 748 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]); 749 } 750 751 /* Unmap Granularity Alignment */ 752 if (scsi_debug_unmap_alignment) { 753 put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]); 754 arr[28] |= 0x80; /* UGAVALID */ 755 } 756 757 /* Optimal Unmap Granularity */ 758 put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]); 759 760 /* Maximum WRITE SAME Length */ 761 put_unaligned_be64(scsi_debug_write_same_length, &arr[32]); 762 763 return 0x3c; /* Mandatory page length for Logical Block Provisioning */ 764 765 return sizeof(vpdb0_data); 766 } 767 768 /* Block device characteristics VPD page (SBC-3) */ 769 static int inquiry_evpd_b1(unsigned char *arr) 770 { 771 memset(arr, 0, 0x3c); 772 arr[0] = 0; 773 arr[1] = 1; /* non rotating medium (e.g. solid state) */ 774 arr[2] = 0; 775 arr[3] = 5; /* less than 1.8" */ 776 777 return 0x3c; 778 } 779 780 /* Logical block provisioning VPD page (SBC-3) */ 781 static int inquiry_evpd_b2(unsigned char *arr) 782 { 783 memset(arr, 0, 0x4); 784 arr[0] = 0; /* threshold exponent */ 785 786 if (scsi_debug_lbpu) 787 arr[1] = 1 << 7; 788 789 if (scsi_debug_lbpws) 790 arr[1] |= 1 << 6; 791 792 if (scsi_debug_lbpws10) 793 arr[1] |= 1 << 5; 794 795 if (scsi_debug_lbprz) 796 arr[1] |= 1 << 2; 797 798 return 0x4; 799 } 800 801 #define SDEBUG_LONG_INQ_SZ 96 802 #define SDEBUG_MAX_INQ_ARR_SZ 584 803 804 static int resp_inquiry(struct scsi_cmnd * scp, int target, 805 struct sdebug_dev_info * devip) 806 { 807 unsigned char pq_pdt; 808 unsigned char * arr; 809 unsigned char *cmd = (unsigned char *)scp->cmnd; 810 int alloc_len, n, ret; 811 812 alloc_len = (cmd[3] << 8) + cmd[4]; 813 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC); 814 if (! arr) 815 return DID_REQUEUE << 16; 816 if (devip->wlun) 817 pq_pdt = 0x1e; /* present, wlun */ 818 else if (scsi_debug_no_lun_0 && (0 == devip->lun)) 819 pq_pdt = 0x7f; /* not present, no device type */ 820 else 821 pq_pdt = (scsi_debug_ptype & 0x1f); 822 arr[0] = pq_pdt; 823 if (0x2 & cmd[1]) { /* CMDDT bit set */ 824 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 825 0); 826 kfree(arr); 827 return check_condition_result; 828 } else if (0x1 & cmd[1]) { /* EVPD bit set */ 829 int lu_id_num, port_group_id, target_dev_id, len; 830 char lu_id_str[6]; 831 int host_no = devip->sdbg_host->shost->host_no; 832 833 port_group_id = (((host_no + 1) & 0x7f) << 8) + 834 (devip->channel & 0x7f); 835 if (0 == scsi_debug_vpd_use_hostno) 836 host_no = 0; 837 lu_id_num = devip->wlun ? -1 : (((host_no + 1) * 2000) + 838 (devip->target * 1000) + devip->lun); 839 target_dev_id = ((host_no + 1) * 2000) + 840 (devip->target * 1000) - 3; 841 len = scnprintf(lu_id_str, 6, "%d", lu_id_num); 842 if (0 == cmd[2]) { /* supported vital product data pages */ 843 arr[1] = cmd[2]; /*sanity */ 844 n = 4; 845 arr[n++] = 0x0; /* this page */ 846 arr[n++] = 0x80; /* unit serial number */ 847 arr[n++] = 0x83; /* device identification */ 848 arr[n++] = 0x84; /* software interface ident. */ 849 arr[n++] = 0x85; /* management network addresses */ 850 arr[n++] = 0x86; /* extended inquiry */ 851 arr[n++] = 0x87; /* mode page policy */ 852 arr[n++] = 0x88; /* SCSI ports */ 853 arr[n++] = 0x89; /* ATA information */ 854 arr[n++] = 0xb0; /* Block limits (SBC) */ 855 arr[n++] = 0xb1; /* Block characteristics (SBC) */ 856 if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */ 857 arr[n++] = 0xb2; 858 arr[3] = n - 4; /* number of supported VPD pages */ 859 } else if (0x80 == cmd[2]) { /* unit serial number */ 860 arr[1] = cmd[2]; /*sanity */ 861 arr[3] = len; 862 memcpy(&arr[4], lu_id_str, len); 863 } else if (0x83 == cmd[2]) { /* device identification */ 864 arr[1] = cmd[2]; /*sanity */ 865 arr[3] = inquiry_evpd_83(&arr[4], port_group_id, 866 target_dev_id, lu_id_num, 867 lu_id_str, len); 868 } else if (0x84 == cmd[2]) { /* Software interface ident. */ 869 arr[1] = cmd[2]; /*sanity */ 870 arr[3] = inquiry_evpd_84(&arr[4]); 871 } else if (0x85 == cmd[2]) { /* Management network addresses */ 872 arr[1] = cmd[2]; /*sanity */ 873 arr[3] = inquiry_evpd_85(&arr[4]); 874 } else if (0x86 == cmd[2]) { /* extended inquiry */ 875 arr[1] = cmd[2]; /*sanity */ 876 arr[3] = 0x3c; /* number of following entries */ 877 if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) 878 arr[4] = 0x4; /* SPT: GRD_CHK:1 */ 879 else if (scsi_debug_dif) 880 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */ 881 else 882 arr[4] = 0x0; /* no protection stuff */ 883 arr[5] = 0x7; /* head of q, ordered + simple q's */ 884 } else if (0x87 == cmd[2]) { /* mode page policy */ 885 arr[1] = cmd[2]; /*sanity */ 886 arr[3] = 0x8; /* number of following entries */ 887 arr[4] = 0x2; /* disconnect-reconnect mp */ 888 arr[6] = 0x80; /* mlus, shared */ 889 arr[8] = 0x18; /* protocol specific lu */ 890 arr[10] = 0x82; /* mlus, per initiator port */ 891 } else if (0x88 == cmd[2]) { /* SCSI Ports */ 892 arr[1] = cmd[2]; /*sanity */ 893 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id); 894 } else if (0x89 == cmd[2]) { /* ATA information */ 895 arr[1] = cmd[2]; /*sanity */ 896 n = inquiry_evpd_89(&arr[4]); 897 arr[2] = (n >> 8); 898 arr[3] = (n & 0xff); 899 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */ 900 arr[1] = cmd[2]; /*sanity */ 901 arr[3] = inquiry_evpd_b0(&arr[4]); 902 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */ 903 arr[1] = cmd[2]; /*sanity */ 904 arr[3] = inquiry_evpd_b1(&arr[4]); 905 } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */ 906 arr[1] = cmd[2]; /*sanity */ 907 arr[3] = inquiry_evpd_b2(&arr[4]); 908 } else { 909 /* Illegal request, invalid field in cdb */ 910 mk_sense_buffer(devip, ILLEGAL_REQUEST, 911 INVALID_FIELD_IN_CDB, 0); 912 kfree(arr); 913 return check_condition_result; 914 } 915 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len); 916 ret = fill_from_dev_buffer(scp, arr, 917 min(len, SDEBUG_MAX_INQ_ARR_SZ)); 918 kfree(arr); 919 return ret; 920 } 921 /* drops through here for a standard inquiry */ 922 arr[1] = DEV_REMOVEABLE(target) ? 0x80 : 0; /* Removable disk */ 923 arr[2] = scsi_debug_scsi_level; 924 arr[3] = 2; /* response_data_format==2 */ 925 arr[4] = SDEBUG_LONG_INQ_SZ - 5; 926 arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */ 927 if (0 == scsi_debug_vpd_use_hostno) 928 arr[5] = 0x10; /* claim: implicit TGPS */ 929 arr[6] = 0x10; /* claim: MultiP */ 930 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */ 931 arr[7] = 0xa; /* claim: LINKED + CMDQUE */ 932 memcpy(&arr[8], inq_vendor_id, 8); 933 memcpy(&arr[16], inq_product_id, 16); 934 memcpy(&arr[32], inq_product_rev, 4); 935 /* version descriptors (2 bytes each) follow */ 936 arr[58] = 0x0; arr[59] = 0x77; /* SAM-3 ANSI */ 937 arr[60] = 0x3; arr[61] = 0x14; /* SPC-3 ANSI */ 938 n = 62; 939 if (scsi_debug_ptype == 0) { 940 arr[n++] = 0x3; arr[n++] = 0x3d; /* SBC-2 ANSI */ 941 } else if (scsi_debug_ptype == 1) { 942 arr[n++] = 0x3; arr[n++] = 0x60; /* SSC-2 no version */ 943 } 944 arr[n++] = 0xc; arr[n++] = 0xf; /* SAS-1.1 rev 10 */ 945 ret = fill_from_dev_buffer(scp, arr, 946 min(alloc_len, SDEBUG_LONG_INQ_SZ)); 947 kfree(arr); 948 return ret; 949 } 950 951 static int resp_requests(struct scsi_cmnd * scp, 952 struct sdebug_dev_info * devip) 953 { 954 unsigned char * sbuff; 955 unsigned char *cmd = (unsigned char *)scp->cmnd; 956 unsigned char arr[SDEBUG_SENSE_LEN]; 957 int want_dsense; 958 int len = 18; 959 960 memset(arr, 0, sizeof(arr)); 961 if (devip->reset == 1) 962 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0); 963 want_dsense = !!(cmd[1] & 1) || scsi_debug_dsense; 964 sbuff = devip->sense_buff; 965 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) { 966 if (want_dsense) { 967 arr[0] = 0x72; 968 arr[1] = 0x0; /* NO_SENSE in sense_key */ 969 arr[2] = THRESHOLD_EXCEEDED; 970 arr[3] = 0xff; /* TEST set and MRIE==6 */ 971 } else { 972 arr[0] = 0x70; 973 arr[2] = 0x0; /* NO_SENSE in sense_key */ 974 arr[7] = 0xa; /* 18 byte sense buffer */ 975 arr[12] = THRESHOLD_EXCEEDED; 976 arr[13] = 0xff; /* TEST set and MRIE==6 */ 977 } 978 } else { 979 memcpy(arr, sbuff, SDEBUG_SENSE_LEN); 980 if ((cmd[1] & 1) && (! scsi_debug_dsense)) { 981 /* DESC bit set and sense_buff in fixed format */ 982 memset(arr, 0, sizeof(arr)); 983 arr[0] = 0x72; 984 arr[1] = sbuff[2]; /* sense key */ 985 arr[2] = sbuff[12]; /* asc */ 986 arr[3] = sbuff[13]; /* ascq */ 987 len = 8; 988 } 989 } 990 mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0); 991 return fill_from_dev_buffer(scp, arr, len); 992 } 993 994 static int resp_start_stop(struct scsi_cmnd * scp, 995 struct sdebug_dev_info * devip) 996 { 997 unsigned char *cmd = (unsigned char *)scp->cmnd; 998 int power_cond, errsts, start; 999 1000 if ((errsts = check_readiness(scp, 1, devip))) 1001 return errsts; 1002 power_cond = (cmd[4] & 0xf0) >> 4; 1003 if (power_cond) { 1004 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 1005 0); 1006 return check_condition_result; 1007 } 1008 start = cmd[4] & 1; 1009 if (start == devip->stopped) 1010 devip->stopped = !start; 1011 return 0; 1012 } 1013 1014 static sector_t get_sdebug_capacity(void) 1015 { 1016 if (scsi_debug_virtual_gb > 0) 1017 return (sector_t)scsi_debug_virtual_gb * 1018 (1073741824 / scsi_debug_sector_size); 1019 else 1020 return sdebug_store_sectors; 1021 } 1022 1023 #define SDEBUG_READCAP_ARR_SZ 8 1024 static int resp_readcap(struct scsi_cmnd * scp, 1025 struct sdebug_dev_info * devip) 1026 { 1027 unsigned char arr[SDEBUG_READCAP_ARR_SZ]; 1028 unsigned int capac; 1029 int errsts; 1030 1031 if ((errsts = check_readiness(scp, 1, devip))) 1032 return errsts; 1033 /* following just in case virtual_gb changed */ 1034 sdebug_capacity = get_sdebug_capacity(); 1035 memset(arr, 0, SDEBUG_READCAP_ARR_SZ); 1036 if (sdebug_capacity < 0xffffffff) { 1037 capac = (unsigned int)sdebug_capacity - 1; 1038 arr[0] = (capac >> 24); 1039 arr[1] = (capac >> 16) & 0xff; 1040 arr[2] = (capac >> 8) & 0xff; 1041 arr[3] = capac & 0xff; 1042 } else { 1043 arr[0] = 0xff; 1044 arr[1] = 0xff; 1045 arr[2] = 0xff; 1046 arr[3] = 0xff; 1047 } 1048 arr[6] = (scsi_debug_sector_size >> 8) & 0xff; 1049 arr[7] = scsi_debug_sector_size & 0xff; 1050 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ); 1051 } 1052 1053 #define SDEBUG_READCAP16_ARR_SZ 32 1054 static int resp_readcap16(struct scsi_cmnd * scp, 1055 struct sdebug_dev_info * devip) 1056 { 1057 unsigned char *cmd = (unsigned char *)scp->cmnd; 1058 unsigned char arr[SDEBUG_READCAP16_ARR_SZ]; 1059 unsigned long long capac; 1060 int errsts, k, alloc_len; 1061 1062 if ((errsts = check_readiness(scp, 1, devip))) 1063 return errsts; 1064 alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8) 1065 + cmd[13]); 1066 /* following just in case virtual_gb changed */ 1067 sdebug_capacity = get_sdebug_capacity(); 1068 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ); 1069 capac = sdebug_capacity - 1; 1070 for (k = 0; k < 8; ++k, capac >>= 8) 1071 arr[7 - k] = capac & 0xff; 1072 arr[8] = (scsi_debug_sector_size >> 24) & 0xff; 1073 arr[9] = (scsi_debug_sector_size >> 16) & 0xff; 1074 arr[10] = (scsi_debug_sector_size >> 8) & 0xff; 1075 arr[11] = scsi_debug_sector_size & 0xff; 1076 arr[13] = scsi_debug_physblk_exp & 0xf; 1077 arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f; 1078 1079 if (scsi_debug_lbp()) { 1080 arr[14] |= 0x80; /* LBPME */ 1081 if (scsi_debug_lbprz) 1082 arr[14] |= 0x40; /* LBPRZ */ 1083 } 1084 1085 arr[15] = scsi_debug_lowest_aligned & 0xff; 1086 1087 if (scsi_debug_dif) { 1088 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */ 1089 arr[12] |= 1; /* PROT_EN */ 1090 } 1091 1092 return fill_from_dev_buffer(scp, arr, 1093 min(alloc_len, SDEBUG_READCAP16_ARR_SZ)); 1094 } 1095 1096 #define SDEBUG_MAX_TGTPGS_ARR_SZ 1412 1097 1098 static int resp_report_tgtpgs(struct scsi_cmnd * scp, 1099 struct sdebug_dev_info * devip) 1100 { 1101 unsigned char *cmd = (unsigned char *)scp->cmnd; 1102 unsigned char * arr; 1103 int host_no = devip->sdbg_host->shost->host_no; 1104 int n, ret, alen, rlen; 1105 int port_group_a, port_group_b, port_a, port_b; 1106 1107 alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8) 1108 + cmd[9]); 1109 1110 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC); 1111 if (! arr) 1112 return DID_REQUEUE << 16; 1113 /* 1114 * EVPD page 0x88 states we have two ports, one 1115 * real and a fake port with no device connected. 1116 * So we create two port groups with one port each 1117 * and set the group with port B to unavailable. 1118 */ 1119 port_a = 0x1; /* relative port A */ 1120 port_b = 0x2; /* relative port B */ 1121 port_group_a = (((host_no + 1) & 0x7f) << 8) + 1122 (devip->channel & 0x7f); 1123 port_group_b = (((host_no + 1) & 0x7f) << 8) + 1124 (devip->channel & 0x7f) + 0x80; 1125 1126 /* 1127 * The asymmetric access state is cycled according to the host_id. 1128 */ 1129 n = 4; 1130 if (0 == scsi_debug_vpd_use_hostno) { 1131 arr[n++] = host_no % 3; /* Asymm access state */ 1132 arr[n++] = 0x0F; /* claim: all states are supported */ 1133 } else { 1134 arr[n++] = 0x0; /* Active/Optimized path */ 1135 arr[n++] = 0x01; /* claim: only support active/optimized paths */ 1136 } 1137 arr[n++] = (port_group_a >> 8) & 0xff; 1138 arr[n++] = port_group_a & 0xff; 1139 arr[n++] = 0; /* Reserved */ 1140 arr[n++] = 0; /* Status code */ 1141 arr[n++] = 0; /* Vendor unique */ 1142 arr[n++] = 0x1; /* One port per group */ 1143 arr[n++] = 0; /* Reserved */ 1144 arr[n++] = 0; /* Reserved */ 1145 arr[n++] = (port_a >> 8) & 0xff; 1146 arr[n++] = port_a & 0xff; 1147 arr[n++] = 3; /* Port unavailable */ 1148 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */ 1149 arr[n++] = (port_group_b >> 8) & 0xff; 1150 arr[n++] = port_group_b & 0xff; 1151 arr[n++] = 0; /* Reserved */ 1152 arr[n++] = 0; /* Status code */ 1153 arr[n++] = 0; /* Vendor unique */ 1154 arr[n++] = 0x1; /* One port per group */ 1155 arr[n++] = 0; /* Reserved */ 1156 arr[n++] = 0; /* Reserved */ 1157 arr[n++] = (port_b >> 8) & 0xff; 1158 arr[n++] = port_b & 0xff; 1159 1160 rlen = n - 4; 1161 arr[0] = (rlen >> 24) & 0xff; 1162 arr[1] = (rlen >> 16) & 0xff; 1163 arr[2] = (rlen >> 8) & 0xff; 1164 arr[3] = rlen & 0xff; 1165 1166 /* 1167 * Return the smallest value of either 1168 * - The allocated length 1169 * - The constructed command length 1170 * - The maximum array size 1171 */ 1172 rlen = min(alen,n); 1173 ret = fill_from_dev_buffer(scp, arr, 1174 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ)); 1175 kfree(arr); 1176 return ret; 1177 } 1178 1179 /* <<Following mode page info copied from ST318451LW>> */ 1180 1181 static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target) 1182 { /* Read-Write Error Recovery page for mode_sense */ 1183 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0, 1184 5, 0, 0xff, 0xff}; 1185 1186 memcpy(p, err_recov_pg, sizeof(err_recov_pg)); 1187 if (1 == pcontrol) 1188 memset(p + 2, 0, sizeof(err_recov_pg) - 2); 1189 return sizeof(err_recov_pg); 1190 } 1191 1192 static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target) 1193 { /* Disconnect-Reconnect page for mode_sense */ 1194 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0, 1195 0, 0, 0, 0, 0, 0, 0, 0}; 1196 1197 memcpy(p, disconnect_pg, sizeof(disconnect_pg)); 1198 if (1 == pcontrol) 1199 memset(p + 2, 0, sizeof(disconnect_pg) - 2); 1200 return sizeof(disconnect_pg); 1201 } 1202 1203 static int resp_format_pg(unsigned char * p, int pcontrol, int target) 1204 { /* Format device page for mode_sense */ 1205 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0, 1206 0, 0, 0, 0, 0, 0, 0, 0, 1207 0, 0, 0, 0, 0x40, 0, 0, 0}; 1208 1209 memcpy(p, format_pg, sizeof(format_pg)); 1210 p[10] = (sdebug_sectors_per >> 8) & 0xff; 1211 p[11] = sdebug_sectors_per & 0xff; 1212 p[12] = (scsi_debug_sector_size >> 8) & 0xff; 1213 p[13] = scsi_debug_sector_size & 0xff; 1214 if (DEV_REMOVEABLE(target)) 1215 p[20] |= 0x20; /* should agree with INQUIRY */ 1216 if (1 == pcontrol) 1217 memset(p + 2, 0, sizeof(format_pg) - 2); 1218 return sizeof(format_pg); 1219 } 1220 1221 static int resp_caching_pg(unsigned char * p, int pcontrol, int target) 1222 { /* Caching page for mode_sense */ 1223 unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, 1224 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0}; 1225 1226 memcpy(p, caching_pg, sizeof(caching_pg)); 1227 if (1 == pcontrol) 1228 memset(p + 2, 0, sizeof(caching_pg) - 2); 1229 return sizeof(caching_pg); 1230 } 1231 1232 static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target) 1233 { /* Control mode page for mode_sense */ 1234 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0, 1235 0, 0, 0, 0}; 1236 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, 1237 0, 0, 0x2, 0x4b}; 1238 1239 if (scsi_debug_dsense) 1240 ctrl_m_pg[2] |= 0x4; 1241 else 1242 ctrl_m_pg[2] &= ~0x4; 1243 1244 if (scsi_debug_ato) 1245 ctrl_m_pg[5] |= 0x80; /* ATO=1 */ 1246 1247 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg)); 1248 if (1 == pcontrol) 1249 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg)); 1250 else if (2 == pcontrol) 1251 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg)); 1252 return sizeof(ctrl_m_pg); 1253 } 1254 1255 1256 static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target) 1257 { /* Informational Exceptions control mode page for mode_sense */ 1258 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0, 1259 0, 0, 0x0, 0x0}; 1260 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, 1261 0, 0, 0x0, 0x0}; 1262 1263 memcpy(p, iec_m_pg, sizeof(iec_m_pg)); 1264 if (1 == pcontrol) 1265 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg)); 1266 else if (2 == pcontrol) 1267 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg)); 1268 return sizeof(iec_m_pg); 1269 } 1270 1271 static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target) 1272 { /* SAS SSP mode page - short format for mode_sense */ 1273 unsigned char sas_sf_m_pg[] = {0x19, 0x6, 1274 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0}; 1275 1276 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg)); 1277 if (1 == pcontrol) 1278 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2); 1279 return sizeof(sas_sf_m_pg); 1280 } 1281 1282 1283 static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target, 1284 int target_dev_id) 1285 { /* SAS phy control and discover mode page for mode_sense */ 1286 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2, 1287 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0, 1288 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0, 1289 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1, 1290 0x2, 0, 0, 0, 0, 0, 0, 0, 1291 0x88, 0x99, 0, 0, 0, 0, 0, 0, 1292 0, 0, 0, 0, 0, 0, 0, 0, 1293 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0, 1294 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0, 1295 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1, 1296 0x3, 0, 0, 0, 0, 0, 0, 0, 1297 0x88, 0x99, 0, 0, 0, 0, 0, 0, 1298 0, 0, 0, 0, 0, 0, 0, 0, 1299 }; 1300 int port_a, port_b; 1301 1302 port_a = target_dev_id + 1; 1303 port_b = port_a + 1; 1304 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg)); 1305 p[20] = (port_a >> 24); 1306 p[21] = (port_a >> 16) & 0xff; 1307 p[22] = (port_a >> 8) & 0xff; 1308 p[23] = port_a & 0xff; 1309 p[48 + 20] = (port_b >> 24); 1310 p[48 + 21] = (port_b >> 16) & 0xff; 1311 p[48 + 22] = (port_b >> 8) & 0xff; 1312 p[48 + 23] = port_b & 0xff; 1313 if (1 == pcontrol) 1314 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4); 1315 return sizeof(sas_pcd_m_pg); 1316 } 1317 1318 static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol) 1319 { /* SAS SSP shared protocol specific port mode subpage */ 1320 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0, 1321 0, 0, 0, 0, 0, 0, 0, 0, 1322 }; 1323 1324 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg)); 1325 if (1 == pcontrol) 1326 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4); 1327 return sizeof(sas_sha_m_pg); 1328 } 1329 1330 #define SDEBUG_MAX_MSENSE_SZ 256 1331 1332 static int resp_mode_sense(struct scsi_cmnd * scp, int target, 1333 struct sdebug_dev_info * devip) 1334 { 1335 unsigned char dbd, llbaa; 1336 int pcontrol, pcode, subpcode, bd_len; 1337 unsigned char dev_spec; 1338 int k, alloc_len, msense_6, offset, len, errsts, target_dev_id; 1339 unsigned char * ap; 1340 unsigned char arr[SDEBUG_MAX_MSENSE_SZ]; 1341 unsigned char *cmd = (unsigned char *)scp->cmnd; 1342 1343 if ((errsts = check_readiness(scp, 1, devip))) 1344 return errsts; 1345 dbd = !!(cmd[1] & 0x8); 1346 pcontrol = (cmd[2] & 0xc0) >> 6; 1347 pcode = cmd[2] & 0x3f; 1348 subpcode = cmd[3]; 1349 msense_6 = (MODE_SENSE == cmd[0]); 1350 llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10); 1351 if ((0 == scsi_debug_ptype) && (0 == dbd)) 1352 bd_len = llbaa ? 16 : 8; 1353 else 1354 bd_len = 0; 1355 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]); 1356 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ); 1357 if (0x3 == pcontrol) { /* Saving values not supported */ 1358 mk_sense_buffer(devip, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 1359 0); 1360 return check_condition_result; 1361 } 1362 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) + 1363 (devip->target * 1000) - 3; 1364 /* set DPOFUA bit for disks */ 1365 if (0 == scsi_debug_ptype) 1366 dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10; 1367 else 1368 dev_spec = 0x0; 1369 if (msense_6) { 1370 arr[2] = dev_spec; 1371 arr[3] = bd_len; 1372 offset = 4; 1373 } else { 1374 arr[3] = dev_spec; 1375 if (16 == bd_len) 1376 arr[4] = 0x1; /* set LONGLBA bit */ 1377 arr[7] = bd_len; /* assume 255 or less */ 1378 offset = 8; 1379 } 1380 ap = arr + offset; 1381 if ((bd_len > 0) && (!sdebug_capacity)) 1382 sdebug_capacity = get_sdebug_capacity(); 1383 1384 if (8 == bd_len) { 1385 if (sdebug_capacity > 0xfffffffe) { 1386 ap[0] = 0xff; 1387 ap[1] = 0xff; 1388 ap[2] = 0xff; 1389 ap[3] = 0xff; 1390 } else { 1391 ap[0] = (sdebug_capacity >> 24) & 0xff; 1392 ap[1] = (sdebug_capacity >> 16) & 0xff; 1393 ap[2] = (sdebug_capacity >> 8) & 0xff; 1394 ap[3] = sdebug_capacity & 0xff; 1395 } 1396 ap[6] = (scsi_debug_sector_size >> 8) & 0xff; 1397 ap[7] = scsi_debug_sector_size & 0xff; 1398 offset += bd_len; 1399 ap = arr + offset; 1400 } else if (16 == bd_len) { 1401 unsigned long long capac = sdebug_capacity; 1402 1403 for (k = 0; k < 8; ++k, capac >>= 8) 1404 ap[7 - k] = capac & 0xff; 1405 ap[12] = (scsi_debug_sector_size >> 24) & 0xff; 1406 ap[13] = (scsi_debug_sector_size >> 16) & 0xff; 1407 ap[14] = (scsi_debug_sector_size >> 8) & 0xff; 1408 ap[15] = scsi_debug_sector_size & 0xff; 1409 offset += bd_len; 1410 ap = arr + offset; 1411 } 1412 1413 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) { 1414 /* TODO: Control Extension page */ 1415 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 1416 0); 1417 return check_condition_result; 1418 } 1419 switch (pcode) { 1420 case 0x1: /* Read-Write error recovery page, direct access */ 1421 len = resp_err_recov_pg(ap, pcontrol, target); 1422 offset += len; 1423 break; 1424 case 0x2: /* Disconnect-Reconnect page, all devices */ 1425 len = resp_disconnect_pg(ap, pcontrol, target); 1426 offset += len; 1427 break; 1428 case 0x3: /* Format device page, direct access */ 1429 len = resp_format_pg(ap, pcontrol, target); 1430 offset += len; 1431 break; 1432 case 0x8: /* Caching page, direct access */ 1433 len = resp_caching_pg(ap, pcontrol, target); 1434 offset += len; 1435 break; 1436 case 0xa: /* Control Mode page, all devices */ 1437 len = resp_ctrl_m_pg(ap, pcontrol, target); 1438 offset += len; 1439 break; 1440 case 0x19: /* if spc==1 then sas phy, control+discover */ 1441 if ((subpcode > 0x2) && (subpcode < 0xff)) { 1442 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1443 INVALID_FIELD_IN_CDB, 0); 1444 return check_condition_result; 1445 } 1446 len = 0; 1447 if ((0x0 == subpcode) || (0xff == subpcode)) 1448 len += resp_sas_sf_m_pg(ap + len, pcontrol, target); 1449 if ((0x1 == subpcode) || (0xff == subpcode)) 1450 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target, 1451 target_dev_id); 1452 if ((0x2 == subpcode) || (0xff == subpcode)) 1453 len += resp_sas_sha_m_spg(ap + len, pcontrol); 1454 offset += len; 1455 break; 1456 case 0x1c: /* Informational Exceptions Mode page, all devices */ 1457 len = resp_iec_m_pg(ap, pcontrol, target); 1458 offset += len; 1459 break; 1460 case 0x3f: /* Read all Mode pages */ 1461 if ((0 == subpcode) || (0xff == subpcode)) { 1462 len = resp_err_recov_pg(ap, pcontrol, target); 1463 len += resp_disconnect_pg(ap + len, pcontrol, target); 1464 len += resp_format_pg(ap + len, pcontrol, target); 1465 len += resp_caching_pg(ap + len, pcontrol, target); 1466 len += resp_ctrl_m_pg(ap + len, pcontrol, target); 1467 len += resp_sas_sf_m_pg(ap + len, pcontrol, target); 1468 if (0xff == subpcode) { 1469 len += resp_sas_pcd_m_spg(ap + len, pcontrol, 1470 target, target_dev_id); 1471 len += resp_sas_sha_m_spg(ap + len, pcontrol); 1472 } 1473 len += resp_iec_m_pg(ap + len, pcontrol, target); 1474 } else { 1475 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1476 INVALID_FIELD_IN_CDB, 0); 1477 return check_condition_result; 1478 } 1479 offset += len; 1480 break; 1481 default: 1482 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 1483 0); 1484 return check_condition_result; 1485 } 1486 if (msense_6) 1487 arr[0] = offset - 1; 1488 else { 1489 arr[0] = ((offset - 2) >> 8) & 0xff; 1490 arr[1] = (offset - 2) & 0xff; 1491 } 1492 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset)); 1493 } 1494 1495 #define SDEBUG_MAX_MSELECT_SZ 512 1496 1497 static int resp_mode_select(struct scsi_cmnd * scp, int mselect6, 1498 struct sdebug_dev_info * devip) 1499 { 1500 int pf, sp, ps, md_len, bd_len, off, spf, pg_len; 1501 int param_len, res, errsts, mpage; 1502 unsigned char arr[SDEBUG_MAX_MSELECT_SZ]; 1503 unsigned char *cmd = (unsigned char *)scp->cmnd; 1504 1505 if ((errsts = check_readiness(scp, 1, devip))) 1506 return errsts; 1507 memset(arr, 0, sizeof(arr)); 1508 pf = cmd[1] & 0x10; 1509 sp = cmd[1] & 0x1; 1510 param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]); 1511 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) { 1512 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1513 INVALID_FIELD_IN_CDB, 0); 1514 return check_condition_result; 1515 } 1516 res = fetch_to_dev_buffer(scp, arr, param_len); 1517 if (-1 == res) 1518 return (DID_ERROR << 16); 1519 else if ((res < param_len) && 1520 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) 1521 printk(KERN_INFO "scsi_debug: mode_select: cdb indicated=%d, " 1522 " IO sent=%d bytes\n", param_len, res); 1523 md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2); 1524 bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]); 1525 if (md_len > 2) { 1526 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1527 INVALID_FIELD_IN_PARAM_LIST, 0); 1528 return check_condition_result; 1529 } 1530 off = bd_len + (mselect6 ? 4 : 8); 1531 mpage = arr[off] & 0x3f; 1532 ps = !!(arr[off] & 0x80); 1533 if (ps) { 1534 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1535 INVALID_FIELD_IN_PARAM_LIST, 0); 1536 return check_condition_result; 1537 } 1538 spf = !!(arr[off] & 0x40); 1539 pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) : 1540 (arr[off + 1] + 2); 1541 if ((pg_len + off) > param_len) { 1542 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1543 PARAMETER_LIST_LENGTH_ERR, 0); 1544 return check_condition_result; 1545 } 1546 switch (mpage) { 1547 case 0xa: /* Control Mode page */ 1548 if (ctrl_m_pg[1] == arr[off + 1]) { 1549 memcpy(ctrl_m_pg + 2, arr + off + 2, 1550 sizeof(ctrl_m_pg) - 2); 1551 scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4); 1552 return 0; 1553 } 1554 break; 1555 case 0x1c: /* Informational Exceptions Mode page */ 1556 if (iec_m_pg[1] == arr[off + 1]) { 1557 memcpy(iec_m_pg + 2, arr + off + 2, 1558 sizeof(iec_m_pg) - 2); 1559 return 0; 1560 } 1561 break; 1562 default: 1563 break; 1564 } 1565 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1566 INVALID_FIELD_IN_PARAM_LIST, 0); 1567 return check_condition_result; 1568 } 1569 1570 static int resp_temp_l_pg(unsigned char * arr) 1571 { 1572 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38, 1573 0x0, 0x1, 0x3, 0x2, 0x0, 65, 1574 }; 1575 1576 memcpy(arr, temp_l_pg, sizeof(temp_l_pg)); 1577 return sizeof(temp_l_pg); 1578 } 1579 1580 static int resp_ie_l_pg(unsigned char * arr) 1581 { 1582 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38, 1583 }; 1584 1585 memcpy(arr, ie_l_pg, sizeof(ie_l_pg)); 1586 if (iec_m_pg[2] & 0x4) { /* TEST bit set */ 1587 arr[4] = THRESHOLD_EXCEEDED; 1588 arr[5] = 0xff; 1589 } 1590 return sizeof(ie_l_pg); 1591 } 1592 1593 #define SDEBUG_MAX_LSENSE_SZ 512 1594 1595 static int resp_log_sense(struct scsi_cmnd * scp, 1596 struct sdebug_dev_info * devip) 1597 { 1598 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, errsts, len, n; 1599 unsigned char arr[SDEBUG_MAX_LSENSE_SZ]; 1600 unsigned char *cmd = (unsigned char *)scp->cmnd; 1601 1602 if ((errsts = check_readiness(scp, 1, devip))) 1603 return errsts; 1604 memset(arr, 0, sizeof(arr)); 1605 ppc = cmd[1] & 0x2; 1606 sp = cmd[1] & 0x1; 1607 if (ppc || sp) { 1608 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1609 INVALID_FIELD_IN_CDB, 0); 1610 return check_condition_result; 1611 } 1612 pcontrol = (cmd[2] & 0xc0) >> 6; 1613 pcode = cmd[2] & 0x3f; 1614 subpcode = cmd[3] & 0xff; 1615 alloc_len = (cmd[7] << 8) + cmd[8]; 1616 arr[0] = pcode; 1617 if (0 == subpcode) { 1618 switch (pcode) { 1619 case 0x0: /* Supported log pages log page */ 1620 n = 4; 1621 arr[n++] = 0x0; /* this page */ 1622 arr[n++] = 0xd; /* Temperature */ 1623 arr[n++] = 0x2f; /* Informational exceptions */ 1624 arr[3] = n - 4; 1625 break; 1626 case 0xd: /* Temperature log page */ 1627 arr[3] = resp_temp_l_pg(arr + 4); 1628 break; 1629 case 0x2f: /* Informational exceptions log page */ 1630 arr[3] = resp_ie_l_pg(arr + 4); 1631 break; 1632 default: 1633 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1634 INVALID_FIELD_IN_CDB, 0); 1635 return check_condition_result; 1636 } 1637 } else if (0xff == subpcode) { 1638 arr[0] |= 0x40; 1639 arr[1] = subpcode; 1640 switch (pcode) { 1641 case 0x0: /* Supported log pages and subpages log page */ 1642 n = 4; 1643 arr[n++] = 0x0; 1644 arr[n++] = 0x0; /* 0,0 page */ 1645 arr[n++] = 0x0; 1646 arr[n++] = 0xff; /* this page */ 1647 arr[n++] = 0xd; 1648 arr[n++] = 0x0; /* Temperature */ 1649 arr[n++] = 0x2f; 1650 arr[n++] = 0x0; /* Informational exceptions */ 1651 arr[3] = n - 4; 1652 break; 1653 case 0xd: /* Temperature subpages */ 1654 n = 4; 1655 arr[n++] = 0xd; 1656 arr[n++] = 0x0; /* Temperature */ 1657 arr[3] = n - 4; 1658 break; 1659 case 0x2f: /* Informational exceptions subpages */ 1660 n = 4; 1661 arr[n++] = 0x2f; 1662 arr[n++] = 0x0; /* Informational exceptions */ 1663 arr[3] = n - 4; 1664 break; 1665 default: 1666 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1667 INVALID_FIELD_IN_CDB, 0); 1668 return check_condition_result; 1669 } 1670 } else { 1671 mk_sense_buffer(devip, ILLEGAL_REQUEST, 1672 INVALID_FIELD_IN_CDB, 0); 1673 return check_condition_result; 1674 } 1675 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len); 1676 return fill_from_dev_buffer(scp, arr, 1677 min(len, SDEBUG_MAX_INQ_ARR_SZ)); 1678 } 1679 1680 static int check_device_access_params(struct sdebug_dev_info *devi, 1681 unsigned long long lba, unsigned int num) 1682 { 1683 if (lba + num > sdebug_capacity) { 1684 mk_sense_buffer(devi, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, 0); 1685 return check_condition_result; 1686 } 1687 /* transfer length excessive (tie in to block limits VPD page) */ 1688 if (num > sdebug_store_sectors) { 1689 mk_sense_buffer(devi, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 1690 return check_condition_result; 1691 } 1692 return 0; 1693 } 1694 1695 static int do_device_access(struct scsi_cmnd *scmd, 1696 struct sdebug_dev_info *devi, 1697 unsigned long long lba, unsigned int num, int write) 1698 { 1699 int ret; 1700 unsigned long long block, rest = 0; 1701 int (*func)(struct scsi_cmnd *, unsigned char *, int); 1702 1703 func = write ? fetch_to_dev_buffer : fill_from_dev_buffer; 1704 1705 block = do_div(lba, sdebug_store_sectors); 1706 if (block + num > sdebug_store_sectors) 1707 rest = block + num - sdebug_store_sectors; 1708 1709 ret = func(scmd, fake_storep + (block * scsi_debug_sector_size), 1710 (num - rest) * scsi_debug_sector_size); 1711 if (!ret && rest) 1712 ret = func(scmd, fake_storep, rest * scsi_debug_sector_size); 1713 1714 return ret; 1715 } 1716 1717 static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec, 1718 unsigned int sectors, u32 ei_lba) 1719 { 1720 unsigned int i, resid; 1721 struct scatterlist *psgl; 1722 struct sd_dif_tuple *sdt; 1723 sector_t sector; 1724 sector_t tmp_sec = start_sec; 1725 void *paddr; 1726 1727 start_sec = do_div(tmp_sec, sdebug_store_sectors); 1728 1729 sdt = (struct sd_dif_tuple *)(dif_storep + dif_offset(start_sec)); 1730 1731 for (i = 0 ; i < sectors ; i++) { 1732 u16 csum; 1733 1734 if (sdt[i].app_tag == 0xffff) 1735 continue; 1736 1737 sector = start_sec + i; 1738 1739 switch (scsi_debug_guard) { 1740 case 1: 1741 csum = ip_compute_csum(fake_storep + 1742 sector * scsi_debug_sector_size, 1743 scsi_debug_sector_size); 1744 break; 1745 case 0: 1746 csum = crc_t10dif(fake_storep + 1747 sector * scsi_debug_sector_size, 1748 scsi_debug_sector_size); 1749 csum = cpu_to_be16(csum); 1750 break; 1751 default: 1752 BUG(); 1753 } 1754 1755 if (sdt[i].guard_tag != csum) { 1756 printk(KERN_ERR "%s: GUARD check failed on sector %lu" \ 1757 " rcvd 0x%04x, data 0x%04x\n", __func__, 1758 (unsigned long)sector, 1759 be16_to_cpu(sdt[i].guard_tag), 1760 be16_to_cpu(csum)); 1761 dif_errors++; 1762 return 0x01; 1763 } 1764 1765 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION && 1766 be32_to_cpu(sdt[i].ref_tag) != (sector & 0xffffffff)) { 1767 printk(KERN_ERR "%s: REF check failed on sector %lu\n", 1768 __func__, (unsigned long)sector); 1769 dif_errors++; 1770 return 0x03; 1771 } 1772 1773 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && 1774 be32_to_cpu(sdt[i].ref_tag) != ei_lba) { 1775 printk(KERN_ERR "%s: REF check failed on sector %lu\n", 1776 __func__, (unsigned long)sector); 1777 dif_errors++; 1778 return 0x03; 1779 } 1780 1781 ei_lba++; 1782 } 1783 1784 resid = sectors * 8; /* Bytes of protection data to copy into sgl */ 1785 sector = start_sec; 1786 1787 scsi_for_each_prot_sg(SCpnt, psgl, scsi_prot_sg_count(SCpnt), i) { 1788 int len = min(psgl->length, resid); 1789 1790 paddr = kmap_atomic(sg_page(psgl)) + psgl->offset; 1791 memcpy(paddr, dif_storep + dif_offset(sector), len); 1792 1793 sector += len >> 3; 1794 if (sector >= sdebug_store_sectors) { 1795 /* Force wrap */ 1796 tmp_sec = sector; 1797 sector = do_div(tmp_sec, sdebug_store_sectors); 1798 } 1799 resid -= len; 1800 kunmap_atomic(paddr); 1801 } 1802 1803 dix_reads++; 1804 1805 return 0; 1806 } 1807 1808 static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba, 1809 unsigned int num, struct sdebug_dev_info *devip, 1810 u32 ei_lba) 1811 { 1812 unsigned long iflags; 1813 int ret; 1814 1815 ret = check_device_access_params(devip, lba, num); 1816 if (ret) 1817 return ret; 1818 1819 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) && 1820 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) && 1821 ((lba + num) > OPT_MEDIUM_ERR_ADDR)) { 1822 /* claim unrecoverable read error */ 1823 mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0); 1824 /* set info field and valid bit for fixed descriptor */ 1825 if (0x70 == (devip->sense_buff[0] & 0x7f)) { 1826 devip->sense_buff[0] |= 0x80; /* Valid bit */ 1827 ret = (lba < OPT_MEDIUM_ERR_ADDR) 1828 ? OPT_MEDIUM_ERR_ADDR : (int)lba; 1829 devip->sense_buff[3] = (ret >> 24) & 0xff; 1830 devip->sense_buff[4] = (ret >> 16) & 0xff; 1831 devip->sense_buff[5] = (ret >> 8) & 0xff; 1832 devip->sense_buff[6] = ret & 0xff; 1833 } 1834 scsi_set_resid(SCpnt, scsi_bufflen(SCpnt)); 1835 return check_condition_result; 1836 } 1837 1838 /* DIX + T10 DIF */ 1839 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) { 1840 int prot_ret = prot_verify_read(SCpnt, lba, num, ei_lba); 1841 1842 if (prot_ret) { 1843 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, prot_ret); 1844 return illegal_condition_result; 1845 } 1846 } 1847 1848 read_lock_irqsave(&atomic_rw, iflags); 1849 ret = do_device_access(SCpnt, devip, lba, num, 0); 1850 read_unlock_irqrestore(&atomic_rw, iflags); 1851 return ret; 1852 } 1853 1854 void dump_sector(unsigned char *buf, int len) 1855 { 1856 int i, j; 1857 1858 printk(KERN_ERR ">>> Sector Dump <<<\n"); 1859 1860 for (i = 0 ; i < len ; i += 16) { 1861 printk(KERN_ERR "%04d: ", i); 1862 1863 for (j = 0 ; j < 16 ; j++) { 1864 unsigned char c = buf[i+j]; 1865 if (c >= 0x20 && c < 0x7e) 1866 printk(" %c ", buf[i+j]); 1867 else 1868 printk("%02x ", buf[i+j]); 1869 } 1870 1871 printk("\n"); 1872 } 1873 } 1874 1875 static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec, 1876 unsigned int sectors, u32 ei_lba) 1877 { 1878 int i, j, ret; 1879 struct sd_dif_tuple *sdt; 1880 struct scatterlist *dsgl = scsi_sglist(SCpnt); 1881 struct scatterlist *psgl = scsi_prot_sglist(SCpnt); 1882 void *daddr, *paddr; 1883 sector_t tmp_sec = start_sec; 1884 sector_t sector; 1885 int ppage_offset; 1886 unsigned short csum; 1887 1888 sector = do_div(tmp_sec, sdebug_store_sectors); 1889 1890 BUG_ON(scsi_sg_count(SCpnt) == 0); 1891 BUG_ON(scsi_prot_sg_count(SCpnt) == 0); 1892 1893 paddr = kmap_atomic(sg_page(psgl)) + psgl->offset; 1894 ppage_offset = 0; 1895 1896 /* For each data page */ 1897 scsi_for_each_sg(SCpnt, dsgl, scsi_sg_count(SCpnt), i) { 1898 daddr = kmap_atomic(sg_page(dsgl)) + dsgl->offset; 1899 1900 /* For each sector-sized chunk in data page */ 1901 for (j = 0 ; j < dsgl->length ; j += scsi_debug_sector_size) { 1902 1903 /* If we're at the end of the current 1904 * protection page advance to the next one 1905 */ 1906 if (ppage_offset >= psgl->length) { 1907 kunmap_atomic(paddr); 1908 psgl = sg_next(psgl); 1909 BUG_ON(psgl == NULL); 1910 paddr = kmap_atomic(sg_page(psgl)) 1911 + psgl->offset; 1912 ppage_offset = 0; 1913 } 1914 1915 sdt = paddr + ppage_offset; 1916 1917 switch (scsi_debug_guard) { 1918 case 1: 1919 csum = ip_compute_csum(daddr, 1920 scsi_debug_sector_size); 1921 break; 1922 case 0: 1923 csum = cpu_to_be16(crc_t10dif(daddr, 1924 scsi_debug_sector_size)); 1925 break; 1926 default: 1927 BUG(); 1928 ret = 0; 1929 goto out; 1930 } 1931 1932 if (sdt->guard_tag != csum) { 1933 printk(KERN_ERR 1934 "%s: GUARD check failed on sector %lu " \ 1935 "rcvd 0x%04x, calculated 0x%04x\n", 1936 __func__, (unsigned long)sector, 1937 be16_to_cpu(sdt->guard_tag), 1938 be16_to_cpu(csum)); 1939 ret = 0x01; 1940 dump_sector(daddr, scsi_debug_sector_size); 1941 goto out; 1942 } 1943 1944 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION && 1945 be32_to_cpu(sdt->ref_tag) 1946 != (start_sec & 0xffffffff)) { 1947 printk(KERN_ERR 1948 "%s: REF check failed on sector %lu\n", 1949 __func__, (unsigned long)sector); 1950 ret = 0x03; 1951 dump_sector(daddr, scsi_debug_sector_size); 1952 goto out; 1953 } 1954 1955 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && 1956 be32_to_cpu(sdt->ref_tag) != ei_lba) { 1957 printk(KERN_ERR 1958 "%s: REF check failed on sector %lu\n", 1959 __func__, (unsigned long)sector); 1960 ret = 0x03; 1961 dump_sector(daddr, scsi_debug_sector_size); 1962 goto out; 1963 } 1964 1965 /* Would be great to copy this in bigger 1966 * chunks. However, for the sake of 1967 * correctness we need to verify each sector 1968 * before writing it to "stable" storage 1969 */ 1970 memcpy(dif_storep + dif_offset(sector), sdt, 8); 1971 1972 sector++; 1973 1974 if (sector == sdebug_store_sectors) 1975 sector = 0; /* Force wrap */ 1976 1977 start_sec++; 1978 ei_lba++; 1979 daddr += scsi_debug_sector_size; 1980 ppage_offset += sizeof(struct sd_dif_tuple); 1981 } 1982 1983 kunmap_atomic(daddr); 1984 } 1985 1986 kunmap_atomic(paddr); 1987 1988 dix_writes++; 1989 1990 return 0; 1991 1992 out: 1993 dif_errors++; 1994 kunmap_atomic(daddr); 1995 kunmap_atomic(paddr); 1996 return ret; 1997 } 1998 1999 static unsigned int map_state(sector_t lba, unsigned int *num) 2000 { 2001 unsigned int granularity, alignment, mapped; 2002 sector_t block, next, end; 2003 2004 granularity = scsi_debug_unmap_granularity; 2005 alignment = granularity - scsi_debug_unmap_alignment; 2006 block = lba + alignment; 2007 do_div(block, granularity); 2008 2009 mapped = test_bit(block, map_storep); 2010 2011 if (mapped) 2012 next = find_next_zero_bit(map_storep, map_size, block); 2013 else 2014 next = find_next_bit(map_storep, map_size, block); 2015 2016 end = next * granularity - scsi_debug_unmap_alignment; 2017 *num = end - lba; 2018 2019 return mapped; 2020 } 2021 2022 static void map_region(sector_t lba, unsigned int len) 2023 { 2024 unsigned int granularity, alignment; 2025 sector_t end = lba + len; 2026 2027 granularity = scsi_debug_unmap_granularity; 2028 alignment = granularity - scsi_debug_unmap_alignment; 2029 2030 while (lba < end) { 2031 sector_t block, rem; 2032 2033 block = lba + alignment; 2034 rem = do_div(block, granularity); 2035 2036 if (block < map_size) 2037 set_bit(block, map_storep); 2038 2039 lba += granularity - rem; 2040 } 2041 } 2042 2043 static void unmap_region(sector_t lba, unsigned int len) 2044 { 2045 unsigned int granularity, alignment; 2046 sector_t end = lba + len; 2047 2048 granularity = scsi_debug_unmap_granularity; 2049 alignment = granularity - scsi_debug_unmap_alignment; 2050 2051 while (lba < end) { 2052 sector_t block, rem; 2053 2054 block = lba + alignment; 2055 rem = do_div(block, granularity); 2056 2057 if (rem == 0 && lba + granularity <= end && block < map_size) { 2058 clear_bit(block, map_storep); 2059 if (scsi_debug_lbprz) 2060 memset(fake_storep + 2061 block * scsi_debug_sector_size, 0, 2062 scsi_debug_sector_size); 2063 } 2064 lba += granularity - rem; 2065 } 2066 } 2067 2068 static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba, 2069 unsigned int num, struct sdebug_dev_info *devip, 2070 u32 ei_lba) 2071 { 2072 unsigned long iflags; 2073 int ret; 2074 2075 ret = check_device_access_params(devip, lba, num); 2076 if (ret) 2077 return ret; 2078 2079 /* DIX + T10 DIF */ 2080 if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) { 2081 int prot_ret = prot_verify_write(SCpnt, lba, num, ei_lba); 2082 2083 if (prot_ret) { 2084 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, prot_ret); 2085 return illegal_condition_result; 2086 } 2087 } 2088 2089 write_lock_irqsave(&atomic_rw, iflags); 2090 ret = do_device_access(SCpnt, devip, lba, num, 1); 2091 if (scsi_debug_unmap_granularity) 2092 map_region(lba, num); 2093 write_unlock_irqrestore(&atomic_rw, iflags); 2094 if (-1 == ret) 2095 return (DID_ERROR << 16); 2096 else if ((ret < (num * scsi_debug_sector_size)) && 2097 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) 2098 printk(KERN_INFO "scsi_debug: write: cdb indicated=%u, " 2099 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret); 2100 2101 return 0; 2102 } 2103 2104 static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba, 2105 unsigned int num, struct sdebug_dev_info *devip, 2106 u32 ei_lba, unsigned int unmap) 2107 { 2108 unsigned long iflags; 2109 unsigned long long i; 2110 int ret; 2111 2112 ret = check_device_access_params(devip, lba, num); 2113 if (ret) 2114 return ret; 2115 2116 if (num > scsi_debug_write_same_length) { 2117 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 2118 0); 2119 return check_condition_result; 2120 } 2121 2122 write_lock_irqsave(&atomic_rw, iflags); 2123 2124 if (unmap && scsi_debug_unmap_granularity) { 2125 unmap_region(lba, num); 2126 goto out; 2127 } 2128 2129 /* Else fetch one logical block */ 2130 ret = fetch_to_dev_buffer(scmd, 2131 fake_storep + (lba * scsi_debug_sector_size), 2132 scsi_debug_sector_size); 2133 2134 if (-1 == ret) { 2135 write_unlock_irqrestore(&atomic_rw, iflags); 2136 return (DID_ERROR << 16); 2137 } else if ((ret < (num * scsi_debug_sector_size)) && 2138 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) 2139 printk(KERN_INFO "scsi_debug: write same: cdb indicated=%u, " 2140 " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret); 2141 2142 /* Copy first sector to remaining blocks */ 2143 for (i = 1 ; i < num ; i++) 2144 memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size), 2145 fake_storep + (lba * scsi_debug_sector_size), 2146 scsi_debug_sector_size); 2147 2148 if (scsi_debug_unmap_granularity) 2149 map_region(lba, num); 2150 out: 2151 write_unlock_irqrestore(&atomic_rw, iflags); 2152 2153 return 0; 2154 } 2155 2156 struct unmap_block_desc { 2157 __be64 lba; 2158 __be32 blocks; 2159 __be32 __reserved; 2160 }; 2161 2162 static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip) 2163 { 2164 unsigned char *buf; 2165 struct unmap_block_desc *desc; 2166 unsigned int i, payload_len, descriptors; 2167 int ret; 2168 2169 ret = check_readiness(scmd, 1, devip); 2170 if (ret) 2171 return ret; 2172 2173 payload_len = get_unaligned_be16(&scmd->cmnd[7]); 2174 BUG_ON(scsi_bufflen(scmd) != payload_len); 2175 2176 descriptors = (payload_len - 8) / 16; 2177 2178 buf = kmalloc(scsi_bufflen(scmd), GFP_ATOMIC); 2179 if (!buf) 2180 return check_condition_result; 2181 2182 scsi_sg_copy_to_buffer(scmd, buf, scsi_bufflen(scmd)); 2183 2184 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2); 2185 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16); 2186 2187 desc = (void *)&buf[8]; 2188 2189 for (i = 0 ; i < descriptors ; i++) { 2190 unsigned long long lba = get_unaligned_be64(&desc[i].lba); 2191 unsigned int num = get_unaligned_be32(&desc[i].blocks); 2192 2193 ret = check_device_access_params(devip, lba, num); 2194 if (ret) 2195 goto out; 2196 2197 unmap_region(lba, num); 2198 } 2199 2200 ret = 0; 2201 2202 out: 2203 kfree(buf); 2204 2205 return ret; 2206 } 2207 2208 #define SDEBUG_GET_LBA_STATUS_LEN 32 2209 2210 static int resp_get_lba_status(struct scsi_cmnd * scmd, 2211 struct sdebug_dev_info * devip) 2212 { 2213 unsigned long long lba; 2214 unsigned int alloc_len, mapped, num; 2215 unsigned char arr[SDEBUG_GET_LBA_STATUS_LEN]; 2216 int ret; 2217 2218 ret = check_readiness(scmd, 1, devip); 2219 if (ret) 2220 return ret; 2221 2222 lba = get_unaligned_be64(&scmd->cmnd[2]); 2223 alloc_len = get_unaligned_be32(&scmd->cmnd[10]); 2224 2225 if (alloc_len < 24) 2226 return 0; 2227 2228 ret = check_device_access_params(devip, lba, 1); 2229 if (ret) 2230 return ret; 2231 2232 mapped = map_state(lba, &num); 2233 2234 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN); 2235 put_unaligned_be32(20, &arr[0]); /* Parameter Data Length */ 2236 put_unaligned_be64(lba, &arr[8]); /* LBA */ 2237 put_unaligned_be32(num, &arr[16]); /* Number of blocks */ 2238 arr[20] = !mapped; /* mapped = 0, unmapped = 1 */ 2239 2240 return fill_from_dev_buffer(scmd, arr, SDEBUG_GET_LBA_STATUS_LEN); 2241 } 2242 2243 #define SDEBUG_RLUN_ARR_SZ 256 2244 2245 static int resp_report_luns(struct scsi_cmnd * scp, 2246 struct sdebug_dev_info * devip) 2247 { 2248 unsigned int alloc_len; 2249 int lun_cnt, i, upper, num, n, wlun, lun; 2250 unsigned char *cmd = (unsigned char *)scp->cmnd; 2251 int select_report = (int)cmd[2]; 2252 struct scsi_lun *one_lun; 2253 unsigned char arr[SDEBUG_RLUN_ARR_SZ]; 2254 unsigned char * max_addr; 2255 2256 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24); 2257 if ((alloc_len < 4) || (select_report > 2)) { 2258 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 2259 0); 2260 return check_condition_result; 2261 } 2262 /* can produce response with up to 16k luns (lun 0 to lun 16383) */ 2263 memset(arr, 0, SDEBUG_RLUN_ARR_SZ); 2264 lun_cnt = scsi_debug_max_luns; 2265 if (1 == select_report) 2266 lun_cnt = 0; 2267 else if (scsi_debug_no_lun_0 && (lun_cnt > 0)) 2268 --lun_cnt; 2269 wlun = (select_report > 0) ? 1 : 0; 2270 num = lun_cnt + wlun; 2271 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff; 2272 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff; 2273 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) / 2274 sizeof(struct scsi_lun)), num); 2275 if (n < num) { 2276 wlun = 0; 2277 lun_cnt = n; 2278 } 2279 one_lun = (struct scsi_lun *) &arr[8]; 2280 max_addr = arr + SDEBUG_RLUN_ARR_SZ; 2281 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0); 2282 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr)); 2283 i++, lun++) { 2284 upper = (lun >> 8) & 0x3f; 2285 if (upper) 2286 one_lun[i].scsi_lun[0] = 2287 (upper | (SAM2_LUN_ADDRESS_METHOD << 6)); 2288 one_lun[i].scsi_lun[1] = lun & 0xff; 2289 } 2290 if (wlun) { 2291 one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff; 2292 one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff; 2293 i++; 2294 } 2295 alloc_len = (unsigned char *)(one_lun + i) - arr; 2296 return fill_from_dev_buffer(scp, arr, 2297 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ)); 2298 } 2299 2300 static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba, 2301 unsigned int num, struct sdebug_dev_info *devip) 2302 { 2303 int i, j, ret = -1; 2304 unsigned char *kaddr, *buf; 2305 unsigned int offset; 2306 struct scatterlist *sg; 2307 struct scsi_data_buffer *sdb = scsi_in(scp); 2308 2309 /* better not to use temporary buffer. */ 2310 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC); 2311 if (!buf) 2312 return ret; 2313 2314 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp)); 2315 2316 offset = 0; 2317 for_each_sg(sdb->table.sgl, sg, sdb->table.nents, i) { 2318 kaddr = (unsigned char *)kmap_atomic(sg_page(sg)); 2319 if (!kaddr) 2320 goto out; 2321 2322 for (j = 0; j < sg->length; j++) 2323 *(kaddr + sg->offset + j) ^= *(buf + offset + j); 2324 2325 offset += sg->length; 2326 kunmap_atomic(kaddr); 2327 } 2328 ret = 0; 2329 out: 2330 kfree(buf); 2331 2332 return ret; 2333 } 2334 2335 /* When timer goes off this function is called. */ 2336 static void timer_intr_handler(unsigned long indx) 2337 { 2338 struct sdebug_queued_cmd * sqcp; 2339 unsigned long iflags; 2340 2341 if (indx >= scsi_debug_max_queue) { 2342 printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too " 2343 "large\n"); 2344 return; 2345 } 2346 spin_lock_irqsave(&queued_arr_lock, iflags); 2347 sqcp = &queued_arr[(int)indx]; 2348 if (! sqcp->in_use) { 2349 printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected " 2350 "interrupt\n"); 2351 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2352 return; 2353 } 2354 sqcp->in_use = 0; 2355 if (sqcp->done_funct) { 2356 sqcp->a_cmnd->result = sqcp->scsi_result; 2357 sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */ 2358 } 2359 sqcp->done_funct = NULL; 2360 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2361 } 2362 2363 2364 static struct sdebug_dev_info * 2365 sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags) 2366 { 2367 struct sdebug_dev_info *devip; 2368 2369 devip = kzalloc(sizeof(*devip), flags); 2370 if (devip) { 2371 devip->sdbg_host = sdbg_host; 2372 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list); 2373 } 2374 return devip; 2375 } 2376 2377 static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev) 2378 { 2379 struct sdebug_host_info * sdbg_host; 2380 struct sdebug_dev_info * open_devip = NULL; 2381 struct sdebug_dev_info * devip = 2382 (struct sdebug_dev_info *)sdev->hostdata; 2383 2384 if (devip) 2385 return devip; 2386 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host); 2387 if (!sdbg_host) { 2388 printk(KERN_ERR "Host info NULL\n"); 2389 return NULL; 2390 } 2391 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { 2392 if ((devip->used) && (devip->channel == sdev->channel) && 2393 (devip->target == sdev->id) && 2394 (devip->lun == sdev->lun)) 2395 return devip; 2396 else { 2397 if ((!devip->used) && (!open_devip)) 2398 open_devip = devip; 2399 } 2400 } 2401 if (!open_devip) { /* try and make a new one */ 2402 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC); 2403 if (!open_devip) { 2404 printk(KERN_ERR "%s: out of memory at line %d\n", 2405 __func__, __LINE__); 2406 return NULL; 2407 } 2408 } 2409 2410 open_devip->channel = sdev->channel; 2411 open_devip->target = sdev->id; 2412 open_devip->lun = sdev->lun; 2413 open_devip->sdbg_host = sdbg_host; 2414 open_devip->reset = 1; 2415 open_devip->used = 1; 2416 memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN); 2417 if (scsi_debug_dsense) 2418 open_devip->sense_buff[0] = 0x72; 2419 else { 2420 open_devip->sense_buff[0] = 0x70; 2421 open_devip->sense_buff[7] = 0xa; 2422 } 2423 if (sdev->lun == SAM2_WLUN_REPORT_LUNS) 2424 open_devip->wlun = SAM2_WLUN_REPORT_LUNS & 0xff; 2425 2426 return open_devip; 2427 } 2428 2429 static int scsi_debug_slave_alloc(struct scsi_device *sdp) 2430 { 2431 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2432 printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %u>\n", 2433 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 2434 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue); 2435 return 0; 2436 } 2437 2438 static int scsi_debug_slave_configure(struct scsi_device *sdp) 2439 { 2440 struct sdebug_dev_info *devip; 2441 2442 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2443 printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %u>\n", 2444 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 2445 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN) 2446 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN; 2447 devip = devInfoReg(sdp); 2448 if (NULL == devip) 2449 return 1; /* no resources, will be marked offline */ 2450 sdp->hostdata = devip; 2451 if (sdp->host->cmd_per_lun) 2452 scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING, 2453 sdp->host->cmd_per_lun); 2454 blk_queue_max_segment_size(sdp->request_queue, 256 * 1024); 2455 if (scsi_debug_no_uld) 2456 sdp->no_uld_attach = 1; 2457 return 0; 2458 } 2459 2460 static void scsi_debug_slave_destroy(struct scsi_device *sdp) 2461 { 2462 struct sdebug_dev_info *devip = 2463 (struct sdebug_dev_info *)sdp->hostdata; 2464 2465 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2466 printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %u>\n", 2467 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 2468 if (devip) { 2469 /* make this slot available for re-use */ 2470 devip->used = 0; 2471 sdp->hostdata = NULL; 2472 } 2473 } 2474 2475 /* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */ 2476 static int stop_queued_cmnd(struct scsi_cmnd *cmnd) 2477 { 2478 unsigned long iflags; 2479 int k; 2480 struct sdebug_queued_cmd *sqcp; 2481 2482 spin_lock_irqsave(&queued_arr_lock, iflags); 2483 for (k = 0; k < scsi_debug_max_queue; ++k) { 2484 sqcp = &queued_arr[k]; 2485 if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) { 2486 del_timer_sync(&sqcp->cmnd_timer); 2487 sqcp->in_use = 0; 2488 sqcp->a_cmnd = NULL; 2489 break; 2490 } 2491 } 2492 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2493 return (k < scsi_debug_max_queue) ? 1 : 0; 2494 } 2495 2496 /* Deletes (stops) timers of all queued commands */ 2497 static void stop_all_queued(void) 2498 { 2499 unsigned long iflags; 2500 int k; 2501 struct sdebug_queued_cmd *sqcp; 2502 2503 spin_lock_irqsave(&queued_arr_lock, iflags); 2504 for (k = 0; k < scsi_debug_max_queue; ++k) { 2505 sqcp = &queued_arr[k]; 2506 if (sqcp->in_use && sqcp->a_cmnd) { 2507 del_timer_sync(&sqcp->cmnd_timer); 2508 sqcp->in_use = 0; 2509 sqcp->a_cmnd = NULL; 2510 } 2511 } 2512 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2513 } 2514 2515 static int scsi_debug_abort(struct scsi_cmnd * SCpnt) 2516 { 2517 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2518 printk(KERN_INFO "scsi_debug: abort\n"); 2519 ++num_aborts; 2520 stop_queued_cmnd(SCpnt); 2521 return SUCCESS; 2522 } 2523 2524 static int scsi_debug_biosparam(struct scsi_device *sdev, 2525 struct block_device * bdev, sector_t capacity, int *info) 2526 { 2527 int res; 2528 unsigned char *buf; 2529 2530 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2531 printk(KERN_INFO "scsi_debug: biosparam\n"); 2532 buf = scsi_bios_ptable(bdev); 2533 if (buf) { 2534 res = scsi_partsize(buf, capacity, 2535 &info[2], &info[0], &info[1]); 2536 kfree(buf); 2537 if (! res) 2538 return res; 2539 } 2540 info[0] = sdebug_heads; 2541 info[1] = sdebug_sectors_per; 2542 info[2] = sdebug_cylinders_per; 2543 return 0; 2544 } 2545 2546 static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt) 2547 { 2548 struct sdebug_dev_info * devip; 2549 2550 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2551 printk(KERN_INFO "scsi_debug: device_reset\n"); 2552 ++num_dev_resets; 2553 if (SCpnt) { 2554 devip = devInfoReg(SCpnt->device); 2555 if (devip) 2556 devip->reset = 1; 2557 } 2558 return SUCCESS; 2559 } 2560 2561 static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt) 2562 { 2563 struct sdebug_host_info *sdbg_host; 2564 struct sdebug_dev_info * dev_info; 2565 struct scsi_device * sdp; 2566 struct Scsi_Host * hp; 2567 2568 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2569 printk(KERN_INFO "scsi_debug: bus_reset\n"); 2570 ++num_bus_resets; 2571 if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) { 2572 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp); 2573 if (sdbg_host) { 2574 list_for_each_entry(dev_info, 2575 &sdbg_host->dev_info_list, 2576 dev_list) 2577 dev_info->reset = 1; 2578 } 2579 } 2580 return SUCCESS; 2581 } 2582 2583 static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt) 2584 { 2585 struct sdebug_host_info * sdbg_host; 2586 struct sdebug_dev_info * dev_info; 2587 2588 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 2589 printk(KERN_INFO "scsi_debug: host_reset\n"); 2590 ++num_host_resets; 2591 spin_lock(&sdebug_host_list_lock); 2592 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { 2593 list_for_each_entry(dev_info, &sdbg_host->dev_info_list, 2594 dev_list) 2595 dev_info->reset = 1; 2596 } 2597 spin_unlock(&sdebug_host_list_lock); 2598 stop_all_queued(); 2599 return SUCCESS; 2600 } 2601 2602 /* Initializes timers in queued array */ 2603 static void __init init_all_queued(void) 2604 { 2605 unsigned long iflags; 2606 int k; 2607 struct sdebug_queued_cmd * sqcp; 2608 2609 spin_lock_irqsave(&queued_arr_lock, iflags); 2610 for (k = 0; k < scsi_debug_max_queue; ++k) { 2611 sqcp = &queued_arr[k]; 2612 init_timer(&sqcp->cmnd_timer); 2613 sqcp->in_use = 0; 2614 sqcp->a_cmnd = NULL; 2615 } 2616 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2617 } 2618 2619 static void __init sdebug_build_parts(unsigned char *ramp, 2620 unsigned long store_size) 2621 { 2622 struct partition * pp; 2623 int starts[SDEBUG_MAX_PARTS + 2]; 2624 int sectors_per_part, num_sectors, k; 2625 int heads_by_sects, start_sec, end_sec; 2626 2627 /* assume partition table already zeroed */ 2628 if ((scsi_debug_num_parts < 1) || (store_size < 1048576)) 2629 return; 2630 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) { 2631 scsi_debug_num_parts = SDEBUG_MAX_PARTS; 2632 printk(KERN_WARNING "scsi_debug:build_parts: reducing " 2633 "partitions to %d\n", SDEBUG_MAX_PARTS); 2634 } 2635 num_sectors = (int)sdebug_store_sectors; 2636 sectors_per_part = (num_sectors - sdebug_sectors_per) 2637 / scsi_debug_num_parts; 2638 heads_by_sects = sdebug_heads * sdebug_sectors_per; 2639 starts[0] = sdebug_sectors_per; 2640 for (k = 1; k < scsi_debug_num_parts; ++k) 2641 starts[k] = ((k * sectors_per_part) / heads_by_sects) 2642 * heads_by_sects; 2643 starts[scsi_debug_num_parts] = num_sectors; 2644 starts[scsi_debug_num_parts + 1] = 0; 2645 2646 ramp[510] = 0x55; /* magic partition markings */ 2647 ramp[511] = 0xAA; 2648 pp = (struct partition *)(ramp + 0x1be); 2649 for (k = 0; starts[k + 1]; ++k, ++pp) { 2650 start_sec = starts[k]; 2651 end_sec = starts[k + 1] - 1; 2652 pp->boot_ind = 0; 2653 2654 pp->cyl = start_sec / heads_by_sects; 2655 pp->head = (start_sec - (pp->cyl * heads_by_sects)) 2656 / sdebug_sectors_per; 2657 pp->sector = (start_sec % sdebug_sectors_per) + 1; 2658 2659 pp->end_cyl = end_sec / heads_by_sects; 2660 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects)) 2661 / sdebug_sectors_per; 2662 pp->end_sector = (end_sec % sdebug_sectors_per) + 1; 2663 2664 pp->start_sect = start_sec; 2665 pp->nr_sects = end_sec - start_sec + 1; 2666 pp->sys_ind = 0x83; /* plain Linux partition */ 2667 } 2668 } 2669 2670 static int schedule_resp(struct scsi_cmnd * cmnd, 2671 struct sdebug_dev_info * devip, 2672 done_funct_t done, int scsi_result, int delta_jiff) 2673 { 2674 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) { 2675 if (scsi_result) { 2676 struct scsi_device * sdp = cmnd->device; 2677 2678 printk(KERN_INFO "scsi_debug: <%u %u %u %u> " 2679 "non-zero result=0x%x\n", sdp->host->host_no, 2680 sdp->channel, sdp->id, sdp->lun, scsi_result); 2681 } 2682 } 2683 if (cmnd && devip) { 2684 /* simulate autosense by this driver */ 2685 if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff)) 2686 memcpy(cmnd->sense_buffer, devip->sense_buff, 2687 (SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ? 2688 SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE); 2689 } 2690 if (delta_jiff <= 0) { 2691 if (cmnd) 2692 cmnd->result = scsi_result; 2693 if (done) 2694 done(cmnd); 2695 return 0; 2696 } else { 2697 unsigned long iflags; 2698 int k; 2699 struct sdebug_queued_cmd * sqcp = NULL; 2700 2701 spin_lock_irqsave(&queued_arr_lock, iflags); 2702 for (k = 0; k < scsi_debug_max_queue; ++k) { 2703 sqcp = &queued_arr[k]; 2704 if (! sqcp->in_use) 2705 break; 2706 } 2707 if (k >= scsi_debug_max_queue) { 2708 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2709 printk(KERN_WARNING "scsi_debug: can_queue exceeded\n"); 2710 return 1; /* report busy to mid level */ 2711 } 2712 sqcp->in_use = 1; 2713 sqcp->a_cmnd = cmnd; 2714 sqcp->scsi_result = scsi_result; 2715 sqcp->done_funct = done; 2716 sqcp->cmnd_timer.function = timer_intr_handler; 2717 sqcp->cmnd_timer.data = k; 2718 sqcp->cmnd_timer.expires = jiffies + delta_jiff; 2719 add_timer(&sqcp->cmnd_timer); 2720 spin_unlock_irqrestore(&queued_arr_lock, iflags); 2721 if (cmnd) 2722 cmnd->result = 0; 2723 return 0; 2724 } 2725 } 2726 /* Note: The following macros create attribute files in the 2727 /sys/module/scsi_debug/parameters directory. Unfortunately this 2728 driver is unaware of a change and cannot trigger auxiliary actions 2729 as it can when the corresponding attribute in the 2730 /sys/bus/pseudo/drivers/scsi_debug directory is changed. 2731 */ 2732 module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR); 2733 module_param_named(ato, scsi_debug_ato, int, S_IRUGO); 2734 module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR); 2735 module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO); 2736 module_param_named(dif, scsi_debug_dif, int, S_IRUGO); 2737 module_param_named(dix, scsi_debug_dix, int, S_IRUGO); 2738 module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR); 2739 module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR); 2740 module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR); 2741 module_param_named(guard, scsi_debug_guard, int, S_IRUGO); 2742 module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO); 2743 module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO); 2744 module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO); 2745 module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO); 2746 module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO); 2747 module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR); 2748 module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR); 2749 module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR); 2750 module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO); 2751 module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO); 2752 module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR); 2753 module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO); 2754 module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR); 2755 module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO); 2756 module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR); 2757 module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO); 2758 module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO); 2759 module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO); 2760 module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO); 2761 module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO); 2762 module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO); 2763 module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR); 2764 module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int, 2765 S_IRUGO | S_IWUSR); 2766 module_param_named(write_same_length, scsi_debug_write_same_length, int, 2767 S_IRUGO | S_IWUSR); 2768 2769 MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert"); 2770 MODULE_DESCRIPTION("SCSI debug adapter driver"); 2771 MODULE_LICENSE("GPL"); 2772 MODULE_VERSION(SCSI_DEBUG_VERSION); 2773 2774 MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)"); 2775 MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)"); 2776 MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)"); 2777 MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)"); 2778 MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)"); 2779 MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)"); 2780 MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)"); 2781 MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)"); 2782 MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)"); 2783 MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)"); 2784 MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)"); 2785 MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)"); 2786 MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)"); 2787 MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)"); 2788 MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)"); 2789 MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)"); 2790 MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to 255(def))"); 2791 MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)"); 2792 MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))"); 2793 MODULE_PARM_DESC(num_parts, "number of partitions(def=0)"); 2794 MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)"); 2795 MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)"); 2796 MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)"); 2797 MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)"); 2798 MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])"); 2799 MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])"); 2800 MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)"); 2801 MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)"); 2802 MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)"); 2803 MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)"); 2804 MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)"); 2805 MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)"); 2806 MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)"); 2807 MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)"); 2808 2809 static char sdebug_info[256]; 2810 2811 static const char * scsi_debug_info(struct Scsi_Host * shp) 2812 { 2813 sprintf(sdebug_info, "scsi_debug, version %s [%s], " 2814 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION, 2815 scsi_debug_version_date, scsi_debug_dev_size_mb, 2816 scsi_debug_opts); 2817 return sdebug_info; 2818 } 2819 2820 /* scsi_debug_proc_info 2821 * Used if the driver currently has no own support for /proc/scsi 2822 */ 2823 static int scsi_debug_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset, 2824 int length, int inout) 2825 { 2826 int len, pos, begin; 2827 int orig_length; 2828 2829 orig_length = length; 2830 2831 if (inout == 1) { 2832 char arr[16]; 2833 int minLen = length > 15 ? 15 : length; 2834 2835 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 2836 return -EACCES; 2837 memcpy(arr, buffer, minLen); 2838 arr[minLen] = '\0'; 2839 if (1 != sscanf(arr, "%d", &pos)) 2840 return -EINVAL; 2841 scsi_debug_opts = pos; 2842 if (scsi_debug_every_nth != 0) 2843 scsi_debug_cmnd_count = 0; 2844 return length; 2845 } 2846 begin = 0; 2847 pos = len = sprintf(buffer, "scsi_debug adapter driver, version " 2848 "%s [%s]\n" 2849 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, " 2850 "every_nth=%d(curr:%d)\n" 2851 "delay=%d, max_luns=%d, scsi_level=%d\n" 2852 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n" 2853 "number of aborts=%d, device_reset=%d, bus_resets=%d, " 2854 "host_resets=%d\ndix_reads=%d dix_writes=%d dif_errors=%d\n", 2855 SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts, 2856 scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth, 2857 scsi_debug_cmnd_count, scsi_debug_delay, 2858 scsi_debug_max_luns, scsi_debug_scsi_level, 2859 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads, 2860 sdebug_sectors_per, num_aborts, num_dev_resets, num_bus_resets, 2861 num_host_resets, dix_reads, dix_writes, dif_errors); 2862 if (pos < offset) { 2863 len = 0; 2864 begin = pos; 2865 } 2866 *start = buffer + (offset - begin); /* Start of wanted data */ 2867 len -= (offset - begin); 2868 if (len > length) 2869 len = length; 2870 return len; 2871 } 2872 2873 static ssize_t sdebug_delay_show(struct device_driver * ddp, char * buf) 2874 { 2875 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay); 2876 } 2877 2878 static ssize_t sdebug_delay_store(struct device_driver * ddp, 2879 const char * buf, size_t count) 2880 { 2881 int delay; 2882 char work[20]; 2883 2884 if (1 == sscanf(buf, "%10s", work)) { 2885 if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) { 2886 scsi_debug_delay = delay; 2887 return count; 2888 } 2889 } 2890 return -EINVAL; 2891 } 2892 DRIVER_ATTR(delay, S_IRUGO | S_IWUSR, sdebug_delay_show, 2893 sdebug_delay_store); 2894 2895 static ssize_t sdebug_opts_show(struct device_driver * ddp, char * buf) 2896 { 2897 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts); 2898 } 2899 2900 static ssize_t sdebug_opts_store(struct device_driver * ddp, 2901 const char * buf, size_t count) 2902 { 2903 int opts; 2904 char work[20]; 2905 2906 if (1 == sscanf(buf, "%10s", work)) { 2907 if (0 == strnicmp(work,"0x", 2)) { 2908 if (1 == sscanf(&work[2], "%x", &opts)) 2909 goto opts_done; 2910 } else { 2911 if (1 == sscanf(work, "%d", &opts)) 2912 goto opts_done; 2913 } 2914 } 2915 return -EINVAL; 2916 opts_done: 2917 scsi_debug_opts = opts; 2918 scsi_debug_cmnd_count = 0; 2919 return count; 2920 } 2921 DRIVER_ATTR(opts, S_IRUGO | S_IWUSR, sdebug_opts_show, 2922 sdebug_opts_store); 2923 2924 static ssize_t sdebug_ptype_show(struct device_driver * ddp, char * buf) 2925 { 2926 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype); 2927 } 2928 static ssize_t sdebug_ptype_store(struct device_driver * ddp, 2929 const char * buf, size_t count) 2930 { 2931 int n; 2932 2933 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 2934 scsi_debug_ptype = n; 2935 return count; 2936 } 2937 return -EINVAL; 2938 } 2939 DRIVER_ATTR(ptype, S_IRUGO | S_IWUSR, sdebug_ptype_show, sdebug_ptype_store); 2940 2941 static ssize_t sdebug_dsense_show(struct device_driver * ddp, char * buf) 2942 { 2943 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense); 2944 } 2945 static ssize_t sdebug_dsense_store(struct device_driver * ddp, 2946 const char * buf, size_t count) 2947 { 2948 int n; 2949 2950 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 2951 scsi_debug_dsense = n; 2952 return count; 2953 } 2954 return -EINVAL; 2955 } 2956 DRIVER_ATTR(dsense, S_IRUGO | S_IWUSR, sdebug_dsense_show, 2957 sdebug_dsense_store); 2958 2959 static ssize_t sdebug_fake_rw_show(struct device_driver * ddp, char * buf) 2960 { 2961 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw); 2962 } 2963 static ssize_t sdebug_fake_rw_store(struct device_driver * ddp, 2964 const char * buf, size_t count) 2965 { 2966 int n; 2967 2968 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 2969 scsi_debug_fake_rw = n; 2970 return count; 2971 } 2972 return -EINVAL; 2973 } 2974 DRIVER_ATTR(fake_rw, S_IRUGO | S_IWUSR, sdebug_fake_rw_show, 2975 sdebug_fake_rw_store); 2976 2977 static ssize_t sdebug_no_lun_0_show(struct device_driver * ddp, char * buf) 2978 { 2979 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0); 2980 } 2981 static ssize_t sdebug_no_lun_0_store(struct device_driver * ddp, 2982 const char * buf, size_t count) 2983 { 2984 int n; 2985 2986 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 2987 scsi_debug_no_lun_0 = n; 2988 return count; 2989 } 2990 return -EINVAL; 2991 } 2992 DRIVER_ATTR(no_lun_0, S_IRUGO | S_IWUSR, sdebug_no_lun_0_show, 2993 sdebug_no_lun_0_store); 2994 2995 static ssize_t sdebug_num_tgts_show(struct device_driver * ddp, char * buf) 2996 { 2997 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts); 2998 } 2999 static ssize_t sdebug_num_tgts_store(struct device_driver * ddp, 3000 const char * buf, size_t count) 3001 { 3002 int n; 3003 3004 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 3005 scsi_debug_num_tgts = n; 3006 sdebug_max_tgts_luns(); 3007 return count; 3008 } 3009 return -EINVAL; 3010 } 3011 DRIVER_ATTR(num_tgts, S_IRUGO | S_IWUSR, sdebug_num_tgts_show, 3012 sdebug_num_tgts_store); 3013 3014 static ssize_t sdebug_dev_size_mb_show(struct device_driver * ddp, char * buf) 3015 { 3016 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb); 3017 } 3018 DRIVER_ATTR(dev_size_mb, S_IRUGO, sdebug_dev_size_mb_show, NULL); 3019 3020 static ssize_t sdebug_num_parts_show(struct device_driver * ddp, char * buf) 3021 { 3022 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts); 3023 } 3024 DRIVER_ATTR(num_parts, S_IRUGO, sdebug_num_parts_show, NULL); 3025 3026 static ssize_t sdebug_every_nth_show(struct device_driver * ddp, char * buf) 3027 { 3028 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth); 3029 } 3030 static ssize_t sdebug_every_nth_store(struct device_driver * ddp, 3031 const char * buf, size_t count) 3032 { 3033 int nth; 3034 3035 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) { 3036 scsi_debug_every_nth = nth; 3037 scsi_debug_cmnd_count = 0; 3038 return count; 3039 } 3040 return -EINVAL; 3041 } 3042 DRIVER_ATTR(every_nth, S_IRUGO | S_IWUSR, sdebug_every_nth_show, 3043 sdebug_every_nth_store); 3044 3045 static ssize_t sdebug_max_luns_show(struct device_driver * ddp, char * buf) 3046 { 3047 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns); 3048 } 3049 static ssize_t sdebug_max_luns_store(struct device_driver * ddp, 3050 const char * buf, size_t count) 3051 { 3052 int n; 3053 3054 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 3055 scsi_debug_max_luns = n; 3056 sdebug_max_tgts_luns(); 3057 return count; 3058 } 3059 return -EINVAL; 3060 } 3061 DRIVER_ATTR(max_luns, S_IRUGO | S_IWUSR, sdebug_max_luns_show, 3062 sdebug_max_luns_store); 3063 3064 static ssize_t sdebug_max_queue_show(struct device_driver * ddp, char * buf) 3065 { 3066 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue); 3067 } 3068 static ssize_t sdebug_max_queue_store(struct device_driver * ddp, 3069 const char * buf, size_t count) 3070 { 3071 int n; 3072 3073 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) && 3074 (n <= SCSI_DEBUG_CANQUEUE)) { 3075 scsi_debug_max_queue = n; 3076 return count; 3077 } 3078 return -EINVAL; 3079 } 3080 DRIVER_ATTR(max_queue, S_IRUGO | S_IWUSR, sdebug_max_queue_show, 3081 sdebug_max_queue_store); 3082 3083 static ssize_t sdebug_no_uld_show(struct device_driver * ddp, char * buf) 3084 { 3085 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld); 3086 } 3087 DRIVER_ATTR(no_uld, S_IRUGO, sdebug_no_uld_show, NULL); 3088 3089 static ssize_t sdebug_scsi_level_show(struct device_driver * ddp, char * buf) 3090 { 3091 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level); 3092 } 3093 DRIVER_ATTR(scsi_level, S_IRUGO, sdebug_scsi_level_show, NULL); 3094 3095 static ssize_t sdebug_virtual_gb_show(struct device_driver * ddp, char * buf) 3096 { 3097 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb); 3098 } 3099 static ssize_t sdebug_virtual_gb_store(struct device_driver * ddp, 3100 const char * buf, size_t count) 3101 { 3102 int n; 3103 3104 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 3105 scsi_debug_virtual_gb = n; 3106 3107 sdebug_capacity = get_sdebug_capacity(); 3108 3109 return count; 3110 } 3111 return -EINVAL; 3112 } 3113 DRIVER_ATTR(virtual_gb, S_IRUGO | S_IWUSR, sdebug_virtual_gb_show, 3114 sdebug_virtual_gb_store); 3115 3116 static ssize_t sdebug_add_host_show(struct device_driver * ddp, char * buf) 3117 { 3118 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host); 3119 } 3120 3121 static ssize_t sdebug_add_host_store(struct device_driver * ddp, 3122 const char * buf, size_t count) 3123 { 3124 int delta_hosts; 3125 3126 if (sscanf(buf, "%d", &delta_hosts) != 1) 3127 return -EINVAL; 3128 if (delta_hosts > 0) { 3129 do { 3130 sdebug_add_adapter(); 3131 } while (--delta_hosts); 3132 } else if (delta_hosts < 0) { 3133 do { 3134 sdebug_remove_adapter(); 3135 } while (++delta_hosts); 3136 } 3137 return count; 3138 } 3139 DRIVER_ATTR(add_host, S_IRUGO | S_IWUSR, sdebug_add_host_show, 3140 sdebug_add_host_store); 3141 3142 static ssize_t sdebug_vpd_use_hostno_show(struct device_driver * ddp, 3143 char * buf) 3144 { 3145 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno); 3146 } 3147 static ssize_t sdebug_vpd_use_hostno_store(struct device_driver * ddp, 3148 const char * buf, size_t count) 3149 { 3150 int n; 3151 3152 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 3153 scsi_debug_vpd_use_hostno = n; 3154 return count; 3155 } 3156 return -EINVAL; 3157 } 3158 DRIVER_ATTR(vpd_use_hostno, S_IRUGO | S_IWUSR, sdebug_vpd_use_hostno_show, 3159 sdebug_vpd_use_hostno_store); 3160 3161 static ssize_t sdebug_sector_size_show(struct device_driver * ddp, char * buf) 3162 { 3163 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size); 3164 } 3165 DRIVER_ATTR(sector_size, S_IRUGO, sdebug_sector_size_show, NULL); 3166 3167 static ssize_t sdebug_dix_show(struct device_driver *ddp, char *buf) 3168 { 3169 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix); 3170 } 3171 DRIVER_ATTR(dix, S_IRUGO, sdebug_dix_show, NULL); 3172 3173 static ssize_t sdebug_dif_show(struct device_driver *ddp, char *buf) 3174 { 3175 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif); 3176 } 3177 DRIVER_ATTR(dif, S_IRUGO, sdebug_dif_show, NULL); 3178 3179 static ssize_t sdebug_guard_show(struct device_driver *ddp, char *buf) 3180 { 3181 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_guard); 3182 } 3183 DRIVER_ATTR(guard, S_IRUGO, sdebug_guard_show, NULL); 3184 3185 static ssize_t sdebug_ato_show(struct device_driver *ddp, char *buf) 3186 { 3187 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato); 3188 } 3189 DRIVER_ATTR(ato, S_IRUGO, sdebug_ato_show, NULL); 3190 3191 static ssize_t sdebug_map_show(struct device_driver *ddp, char *buf) 3192 { 3193 ssize_t count; 3194 3195 if (!scsi_debug_lbp()) 3196 return scnprintf(buf, PAGE_SIZE, "0-%u\n", 3197 sdebug_store_sectors); 3198 3199 count = bitmap_scnlistprintf(buf, PAGE_SIZE, map_storep, map_size); 3200 3201 buf[count++] = '\n'; 3202 buf[count++] = 0; 3203 3204 return count; 3205 } 3206 DRIVER_ATTR(map, S_IRUGO, sdebug_map_show, NULL); 3207 3208 3209 /* Note: The following function creates attribute files in the 3210 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these 3211 files (over those found in the /sys/module/scsi_debug/parameters 3212 directory) is that auxiliary actions can be triggered when an attribute 3213 is changed. For example see: sdebug_add_host_store() above. 3214 */ 3215 static int do_create_driverfs_files(void) 3216 { 3217 int ret; 3218 3219 ret = driver_create_file(&sdebug_driverfs_driver, &driver_attr_add_host); 3220 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay); 3221 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb); 3222 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dsense); 3223 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_every_nth); 3224 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_fake_rw); 3225 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_luns); 3226 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_queue); 3227 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0); 3228 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_uld); 3229 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_parts); 3230 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_tgts); 3231 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ptype); 3232 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_opts); 3233 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level); 3234 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb); 3235 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno); 3236 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_sector_size); 3237 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dix); 3238 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dif); 3239 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_guard); 3240 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ato); 3241 ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_map); 3242 return ret; 3243 } 3244 3245 static void do_remove_driverfs_files(void) 3246 { 3247 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_map); 3248 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ato); 3249 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_guard); 3250 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dif); 3251 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dix); 3252 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_sector_size); 3253 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno); 3254 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb); 3255 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level); 3256 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_opts); 3257 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ptype); 3258 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_tgts); 3259 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_parts); 3260 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_uld); 3261 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0); 3262 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_queue); 3263 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_luns); 3264 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_fake_rw); 3265 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_every_nth); 3266 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dsense); 3267 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb); 3268 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay); 3269 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host); 3270 } 3271 3272 struct device *pseudo_primary; 3273 3274 static int __init scsi_debug_init(void) 3275 { 3276 unsigned long sz; 3277 int host_to_add; 3278 int k; 3279 int ret; 3280 3281 switch (scsi_debug_sector_size) { 3282 case 512: 3283 case 1024: 3284 case 2048: 3285 case 4096: 3286 break; 3287 default: 3288 printk(KERN_ERR "scsi_debug_init: invalid sector_size %d\n", 3289 scsi_debug_sector_size); 3290 return -EINVAL; 3291 } 3292 3293 switch (scsi_debug_dif) { 3294 3295 case SD_DIF_TYPE0_PROTECTION: 3296 case SD_DIF_TYPE1_PROTECTION: 3297 case SD_DIF_TYPE2_PROTECTION: 3298 case SD_DIF_TYPE3_PROTECTION: 3299 break; 3300 3301 default: 3302 printk(KERN_ERR "scsi_debug_init: dif must be 0, 1, 2 or 3\n"); 3303 return -EINVAL; 3304 } 3305 3306 if (scsi_debug_guard > 1) { 3307 printk(KERN_ERR "scsi_debug_init: guard must be 0 or 1\n"); 3308 return -EINVAL; 3309 } 3310 3311 if (scsi_debug_ato > 1) { 3312 printk(KERN_ERR "scsi_debug_init: ato must be 0 or 1\n"); 3313 return -EINVAL; 3314 } 3315 3316 if (scsi_debug_physblk_exp > 15) { 3317 printk(KERN_ERR "scsi_debug_init: invalid physblk_exp %u\n", 3318 scsi_debug_physblk_exp); 3319 return -EINVAL; 3320 } 3321 3322 if (scsi_debug_lowest_aligned > 0x3fff) { 3323 printk(KERN_ERR "scsi_debug_init: lowest_aligned too big: %u\n", 3324 scsi_debug_lowest_aligned); 3325 return -EINVAL; 3326 } 3327 3328 if (scsi_debug_dev_size_mb < 1) 3329 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */ 3330 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576; 3331 sdebug_store_sectors = sz / scsi_debug_sector_size; 3332 sdebug_capacity = get_sdebug_capacity(); 3333 3334 /* play around with geometry, don't waste too much on track 0 */ 3335 sdebug_heads = 8; 3336 sdebug_sectors_per = 32; 3337 if (scsi_debug_dev_size_mb >= 16) 3338 sdebug_heads = 32; 3339 else if (scsi_debug_dev_size_mb >= 256) 3340 sdebug_heads = 64; 3341 sdebug_cylinders_per = (unsigned long)sdebug_capacity / 3342 (sdebug_sectors_per * sdebug_heads); 3343 if (sdebug_cylinders_per >= 1024) { 3344 /* other LLDs do this; implies >= 1GB ram disk ... */ 3345 sdebug_heads = 255; 3346 sdebug_sectors_per = 63; 3347 sdebug_cylinders_per = (unsigned long)sdebug_capacity / 3348 (sdebug_sectors_per * sdebug_heads); 3349 } 3350 3351 fake_storep = vmalloc(sz); 3352 if (NULL == fake_storep) { 3353 printk(KERN_ERR "scsi_debug_init: out of memory, 1\n"); 3354 return -ENOMEM; 3355 } 3356 memset(fake_storep, 0, sz); 3357 if (scsi_debug_num_parts > 0) 3358 sdebug_build_parts(fake_storep, sz); 3359 3360 if (scsi_debug_dif) { 3361 int dif_size; 3362 3363 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple); 3364 dif_storep = vmalloc(dif_size); 3365 3366 printk(KERN_ERR "scsi_debug_init: dif_storep %u bytes @ %p\n", 3367 dif_size, dif_storep); 3368 3369 if (dif_storep == NULL) { 3370 printk(KERN_ERR "scsi_debug_init: out of mem. (DIX)\n"); 3371 ret = -ENOMEM; 3372 goto free_vm; 3373 } 3374 3375 memset(dif_storep, 0xff, dif_size); 3376 } 3377 3378 /* Logical Block Provisioning */ 3379 if (scsi_debug_lbp()) { 3380 unsigned int map_bytes; 3381 3382 scsi_debug_unmap_max_blocks = 3383 clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU); 3384 3385 scsi_debug_unmap_max_desc = 3386 clamp(scsi_debug_unmap_max_desc, 0U, 256U); 3387 3388 scsi_debug_unmap_granularity = 3389 clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU); 3390 3391 if (scsi_debug_unmap_alignment && 3392 scsi_debug_unmap_granularity < scsi_debug_unmap_alignment) { 3393 printk(KERN_ERR 3394 "%s: ERR: unmap_granularity < unmap_alignment\n", 3395 __func__); 3396 return -EINVAL; 3397 } 3398 3399 map_size = (sdebug_store_sectors / scsi_debug_unmap_granularity); 3400 map_bytes = map_size >> 3; 3401 map_storep = vmalloc(map_bytes); 3402 3403 printk(KERN_INFO "scsi_debug_init: %lu provisioning blocks\n", 3404 map_size); 3405 3406 if (map_storep == NULL) { 3407 printk(KERN_ERR "scsi_debug_init: out of mem. (MAP)\n"); 3408 ret = -ENOMEM; 3409 goto free_vm; 3410 } 3411 3412 memset(map_storep, 0x0, map_bytes); 3413 3414 /* Map first 1KB for partition table */ 3415 if (scsi_debug_num_parts) 3416 map_region(0, 2); 3417 } 3418 3419 pseudo_primary = root_device_register("pseudo_0"); 3420 if (IS_ERR(pseudo_primary)) { 3421 printk(KERN_WARNING "scsi_debug: root_device_register() error\n"); 3422 ret = PTR_ERR(pseudo_primary); 3423 goto free_vm; 3424 } 3425 ret = bus_register(&pseudo_lld_bus); 3426 if (ret < 0) { 3427 printk(KERN_WARNING "scsi_debug: bus_register error: %d\n", 3428 ret); 3429 goto dev_unreg; 3430 } 3431 ret = driver_register(&sdebug_driverfs_driver); 3432 if (ret < 0) { 3433 printk(KERN_WARNING "scsi_debug: driver_register error: %d\n", 3434 ret); 3435 goto bus_unreg; 3436 } 3437 ret = do_create_driverfs_files(); 3438 if (ret < 0) { 3439 printk(KERN_WARNING "scsi_debug: driver_create_file error: %d\n", 3440 ret); 3441 goto del_files; 3442 } 3443 3444 init_all_queued(); 3445 3446 host_to_add = scsi_debug_add_host; 3447 scsi_debug_add_host = 0; 3448 3449 for (k = 0; k < host_to_add; k++) { 3450 if (sdebug_add_adapter()) { 3451 printk(KERN_ERR "scsi_debug_init: " 3452 "sdebug_add_adapter failed k=%d\n", k); 3453 break; 3454 } 3455 } 3456 3457 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) { 3458 printk(KERN_INFO "scsi_debug_init: built %d host(s)\n", 3459 scsi_debug_add_host); 3460 } 3461 return 0; 3462 3463 del_files: 3464 do_remove_driverfs_files(); 3465 driver_unregister(&sdebug_driverfs_driver); 3466 bus_unreg: 3467 bus_unregister(&pseudo_lld_bus); 3468 dev_unreg: 3469 root_device_unregister(pseudo_primary); 3470 free_vm: 3471 if (map_storep) 3472 vfree(map_storep); 3473 if (dif_storep) 3474 vfree(dif_storep); 3475 vfree(fake_storep); 3476 3477 return ret; 3478 } 3479 3480 static void __exit scsi_debug_exit(void) 3481 { 3482 int k = scsi_debug_add_host; 3483 3484 stop_all_queued(); 3485 for (; k; k--) 3486 sdebug_remove_adapter(); 3487 do_remove_driverfs_files(); 3488 driver_unregister(&sdebug_driverfs_driver); 3489 bus_unregister(&pseudo_lld_bus); 3490 root_device_unregister(pseudo_primary); 3491 3492 if (dif_storep) 3493 vfree(dif_storep); 3494 3495 vfree(fake_storep); 3496 } 3497 3498 device_initcall(scsi_debug_init); 3499 module_exit(scsi_debug_exit); 3500 3501 static void sdebug_release_adapter(struct device * dev) 3502 { 3503 struct sdebug_host_info *sdbg_host; 3504 3505 sdbg_host = to_sdebug_host(dev); 3506 kfree(sdbg_host); 3507 } 3508 3509 static int sdebug_add_adapter(void) 3510 { 3511 int k, devs_per_host; 3512 int error = 0; 3513 struct sdebug_host_info *sdbg_host; 3514 struct sdebug_dev_info *sdbg_devinfo, *tmp; 3515 3516 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL); 3517 if (NULL == sdbg_host) { 3518 printk(KERN_ERR "%s: out of memory at line %d\n", 3519 __func__, __LINE__); 3520 return -ENOMEM; 3521 } 3522 3523 INIT_LIST_HEAD(&sdbg_host->dev_info_list); 3524 3525 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns; 3526 for (k = 0; k < devs_per_host; k++) { 3527 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL); 3528 if (!sdbg_devinfo) { 3529 printk(KERN_ERR "%s: out of memory at line %d\n", 3530 __func__, __LINE__); 3531 error = -ENOMEM; 3532 goto clean; 3533 } 3534 } 3535 3536 spin_lock(&sdebug_host_list_lock); 3537 list_add_tail(&sdbg_host->host_list, &sdebug_host_list); 3538 spin_unlock(&sdebug_host_list_lock); 3539 3540 sdbg_host->dev.bus = &pseudo_lld_bus; 3541 sdbg_host->dev.parent = pseudo_primary; 3542 sdbg_host->dev.release = &sdebug_release_adapter; 3543 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host); 3544 3545 error = device_register(&sdbg_host->dev); 3546 3547 if (error) 3548 goto clean; 3549 3550 ++scsi_debug_add_host; 3551 return error; 3552 3553 clean: 3554 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list, 3555 dev_list) { 3556 list_del(&sdbg_devinfo->dev_list); 3557 kfree(sdbg_devinfo); 3558 } 3559 3560 kfree(sdbg_host); 3561 return error; 3562 } 3563 3564 static void sdebug_remove_adapter(void) 3565 { 3566 struct sdebug_host_info * sdbg_host = NULL; 3567 3568 spin_lock(&sdebug_host_list_lock); 3569 if (!list_empty(&sdebug_host_list)) { 3570 sdbg_host = list_entry(sdebug_host_list.prev, 3571 struct sdebug_host_info, host_list); 3572 list_del(&sdbg_host->host_list); 3573 } 3574 spin_unlock(&sdebug_host_list_lock); 3575 3576 if (!sdbg_host) 3577 return; 3578 3579 device_unregister(&sdbg_host->dev); 3580 --scsi_debug_add_host; 3581 } 3582 3583 static 3584 int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done) 3585 { 3586 unsigned char *cmd = (unsigned char *) SCpnt->cmnd; 3587 int len, k; 3588 unsigned int num; 3589 unsigned long long lba; 3590 u32 ei_lba; 3591 int errsts = 0; 3592 int target = SCpnt->device->id; 3593 struct sdebug_dev_info *devip = NULL; 3594 int inj_recovered = 0; 3595 int inj_transport = 0; 3596 int inj_dif = 0; 3597 int inj_dix = 0; 3598 int delay_override = 0; 3599 int unmap = 0; 3600 3601 scsi_set_resid(SCpnt, 0); 3602 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) { 3603 printk(KERN_INFO "scsi_debug: cmd "); 3604 for (k = 0, len = SCpnt->cmd_len; k < len; ++k) 3605 printk("%02x ", (int)cmd[k]); 3606 printk("\n"); 3607 } 3608 3609 if (target == SCpnt->device->host->hostt->this_id) { 3610 printk(KERN_INFO "scsi_debug: initiator's id used as " 3611 "target!\n"); 3612 return schedule_resp(SCpnt, NULL, done, 3613 DID_NO_CONNECT << 16, 0); 3614 } 3615 3616 if ((SCpnt->device->lun >= scsi_debug_max_luns) && 3617 (SCpnt->device->lun != SAM2_WLUN_REPORT_LUNS)) 3618 return schedule_resp(SCpnt, NULL, done, 3619 DID_NO_CONNECT << 16, 0); 3620 devip = devInfoReg(SCpnt->device); 3621 if (NULL == devip) 3622 return schedule_resp(SCpnt, NULL, done, 3623 DID_NO_CONNECT << 16, 0); 3624 3625 if ((scsi_debug_every_nth != 0) && 3626 (++scsi_debug_cmnd_count >= abs(scsi_debug_every_nth))) { 3627 scsi_debug_cmnd_count = 0; 3628 if (scsi_debug_every_nth < -1) 3629 scsi_debug_every_nth = -1; 3630 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts) 3631 return 0; /* ignore command causing timeout */ 3632 else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts && 3633 scsi_medium_access_command(SCpnt)) 3634 return 0; /* time out reads and writes */ 3635 else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts) 3636 inj_recovered = 1; /* to reads and writes below */ 3637 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & scsi_debug_opts) 3638 inj_transport = 1; /* to reads and writes below */ 3639 else if (SCSI_DEBUG_OPT_DIF_ERR & scsi_debug_opts) 3640 inj_dif = 1; /* to reads and writes below */ 3641 else if (SCSI_DEBUG_OPT_DIX_ERR & scsi_debug_opts) 3642 inj_dix = 1; /* to reads and writes below */ 3643 } 3644 3645 if (devip->wlun) { 3646 switch (*cmd) { 3647 case INQUIRY: 3648 case REQUEST_SENSE: 3649 case TEST_UNIT_READY: 3650 case REPORT_LUNS: 3651 break; /* only allowable wlun commands */ 3652 default: 3653 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 3654 printk(KERN_INFO "scsi_debug: Opcode: 0x%x " 3655 "not supported for wlun\n", *cmd); 3656 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3657 INVALID_OPCODE, 0); 3658 errsts = check_condition_result; 3659 return schedule_resp(SCpnt, devip, done, errsts, 3660 0); 3661 } 3662 } 3663 3664 switch (*cmd) { 3665 case INQUIRY: /* mandatory, ignore unit attention */ 3666 delay_override = 1; 3667 errsts = resp_inquiry(SCpnt, target, devip); 3668 break; 3669 case REQUEST_SENSE: /* mandatory, ignore unit attention */ 3670 delay_override = 1; 3671 errsts = resp_requests(SCpnt, devip); 3672 break; 3673 case REZERO_UNIT: /* actually this is REWIND for SSC */ 3674 case START_STOP: 3675 errsts = resp_start_stop(SCpnt, devip); 3676 break; 3677 case ALLOW_MEDIUM_REMOVAL: 3678 errsts = check_readiness(SCpnt, 1, devip); 3679 if (errsts) 3680 break; 3681 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 3682 printk(KERN_INFO "scsi_debug: Medium removal %s\n", 3683 cmd[4] ? "inhibited" : "enabled"); 3684 break; 3685 case SEND_DIAGNOSTIC: /* mandatory */ 3686 errsts = check_readiness(SCpnt, 1, devip); 3687 break; 3688 case TEST_UNIT_READY: /* mandatory */ 3689 delay_override = 1; 3690 errsts = check_readiness(SCpnt, 0, devip); 3691 break; 3692 case RESERVE: 3693 errsts = check_readiness(SCpnt, 1, devip); 3694 break; 3695 case RESERVE_10: 3696 errsts = check_readiness(SCpnt, 1, devip); 3697 break; 3698 case RELEASE: 3699 errsts = check_readiness(SCpnt, 1, devip); 3700 break; 3701 case RELEASE_10: 3702 errsts = check_readiness(SCpnt, 1, devip); 3703 break; 3704 case READ_CAPACITY: 3705 errsts = resp_readcap(SCpnt, devip); 3706 break; 3707 case SERVICE_ACTION_IN: 3708 if (cmd[1] == SAI_READ_CAPACITY_16) 3709 errsts = resp_readcap16(SCpnt, devip); 3710 else if (cmd[1] == SAI_GET_LBA_STATUS) { 3711 3712 if (scsi_debug_lbp() == 0) { 3713 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3714 INVALID_COMMAND_OPCODE, 0); 3715 errsts = check_condition_result; 3716 } else 3717 errsts = resp_get_lba_status(SCpnt, devip); 3718 } else { 3719 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3720 INVALID_OPCODE, 0); 3721 errsts = check_condition_result; 3722 } 3723 break; 3724 case MAINTENANCE_IN: 3725 if (MI_REPORT_TARGET_PGS != cmd[1]) { 3726 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3727 INVALID_OPCODE, 0); 3728 errsts = check_condition_result; 3729 break; 3730 } 3731 errsts = resp_report_tgtpgs(SCpnt, devip); 3732 break; 3733 case READ_16: 3734 case READ_12: 3735 case READ_10: 3736 /* READ{10,12,16} and DIF Type 2 are natural enemies */ 3737 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && 3738 cmd[1] & 0xe0) { 3739 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3740 INVALID_COMMAND_OPCODE, 0); 3741 errsts = check_condition_result; 3742 break; 3743 } 3744 3745 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION || 3746 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) && 3747 (cmd[1] & 0xe0) == 0) 3748 printk(KERN_ERR "Unprotected RD/WR to DIF device\n"); 3749 3750 /* fall through */ 3751 case READ_6: 3752 read: 3753 errsts = check_readiness(SCpnt, 0, devip); 3754 if (errsts) 3755 break; 3756 if (scsi_debug_fake_rw) 3757 break; 3758 get_data_transfer_info(cmd, &lba, &num, &ei_lba); 3759 errsts = resp_read(SCpnt, lba, num, devip, ei_lba); 3760 if (inj_recovered && (0 == errsts)) { 3761 mk_sense_buffer(devip, RECOVERED_ERROR, 3762 THRESHOLD_EXCEEDED, 0); 3763 errsts = check_condition_result; 3764 } else if (inj_transport && (0 == errsts)) { 3765 mk_sense_buffer(devip, ABORTED_COMMAND, 3766 TRANSPORT_PROBLEM, ACK_NAK_TO); 3767 errsts = check_condition_result; 3768 } else if (inj_dif && (0 == errsts)) { 3769 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1); 3770 errsts = illegal_condition_result; 3771 } else if (inj_dix && (0 == errsts)) { 3772 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1); 3773 errsts = illegal_condition_result; 3774 } 3775 break; 3776 case REPORT_LUNS: /* mandatory, ignore unit attention */ 3777 delay_override = 1; 3778 errsts = resp_report_luns(SCpnt, devip); 3779 break; 3780 case VERIFY: /* 10 byte SBC-2 command */ 3781 errsts = check_readiness(SCpnt, 0, devip); 3782 break; 3783 case WRITE_16: 3784 case WRITE_12: 3785 case WRITE_10: 3786 /* WRITE{10,12,16} and DIF Type 2 are natural enemies */ 3787 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && 3788 cmd[1] & 0xe0) { 3789 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3790 INVALID_COMMAND_OPCODE, 0); 3791 errsts = check_condition_result; 3792 break; 3793 } 3794 3795 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION || 3796 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) && 3797 (cmd[1] & 0xe0) == 0) 3798 printk(KERN_ERR "Unprotected RD/WR to DIF device\n"); 3799 3800 /* fall through */ 3801 case WRITE_6: 3802 write: 3803 errsts = check_readiness(SCpnt, 0, devip); 3804 if (errsts) 3805 break; 3806 if (scsi_debug_fake_rw) 3807 break; 3808 get_data_transfer_info(cmd, &lba, &num, &ei_lba); 3809 errsts = resp_write(SCpnt, lba, num, devip, ei_lba); 3810 if (inj_recovered && (0 == errsts)) { 3811 mk_sense_buffer(devip, RECOVERED_ERROR, 3812 THRESHOLD_EXCEEDED, 0); 3813 errsts = check_condition_result; 3814 } else if (inj_dif && (0 == errsts)) { 3815 mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1); 3816 errsts = illegal_condition_result; 3817 } else if (inj_dix && (0 == errsts)) { 3818 mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1); 3819 errsts = illegal_condition_result; 3820 } 3821 break; 3822 case WRITE_SAME_16: 3823 case WRITE_SAME: 3824 if (cmd[1] & 0x8) { 3825 if ((*cmd == WRITE_SAME_16 && scsi_debug_lbpws == 0) || 3826 (*cmd == WRITE_SAME && scsi_debug_lbpws10 == 0)) { 3827 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3828 INVALID_FIELD_IN_CDB, 0); 3829 errsts = check_condition_result; 3830 } else 3831 unmap = 1; 3832 } 3833 if (errsts) 3834 break; 3835 errsts = check_readiness(SCpnt, 0, devip); 3836 if (errsts) 3837 break; 3838 get_data_transfer_info(cmd, &lba, &num, &ei_lba); 3839 errsts = resp_write_same(SCpnt, lba, num, devip, ei_lba, unmap); 3840 break; 3841 case UNMAP: 3842 errsts = check_readiness(SCpnt, 0, devip); 3843 if (errsts) 3844 break; 3845 3846 if (scsi_debug_unmap_max_desc == 0 || scsi_debug_lbpu == 0) { 3847 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3848 INVALID_COMMAND_OPCODE, 0); 3849 errsts = check_condition_result; 3850 } else 3851 errsts = resp_unmap(SCpnt, devip); 3852 break; 3853 case MODE_SENSE: 3854 case MODE_SENSE_10: 3855 errsts = resp_mode_sense(SCpnt, target, devip); 3856 break; 3857 case MODE_SELECT: 3858 errsts = resp_mode_select(SCpnt, 1, devip); 3859 break; 3860 case MODE_SELECT_10: 3861 errsts = resp_mode_select(SCpnt, 0, devip); 3862 break; 3863 case LOG_SENSE: 3864 errsts = resp_log_sense(SCpnt, devip); 3865 break; 3866 case SYNCHRONIZE_CACHE: 3867 delay_override = 1; 3868 errsts = check_readiness(SCpnt, 0, devip); 3869 break; 3870 case WRITE_BUFFER: 3871 errsts = check_readiness(SCpnt, 1, devip); 3872 break; 3873 case XDWRITEREAD_10: 3874 if (!scsi_bidi_cmnd(SCpnt)) { 3875 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3876 INVALID_FIELD_IN_CDB, 0); 3877 errsts = check_condition_result; 3878 break; 3879 } 3880 3881 errsts = check_readiness(SCpnt, 0, devip); 3882 if (errsts) 3883 break; 3884 if (scsi_debug_fake_rw) 3885 break; 3886 get_data_transfer_info(cmd, &lba, &num, &ei_lba); 3887 errsts = resp_read(SCpnt, lba, num, devip, ei_lba); 3888 if (errsts) 3889 break; 3890 errsts = resp_write(SCpnt, lba, num, devip, ei_lba); 3891 if (errsts) 3892 break; 3893 errsts = resp_xdwriteread(SCpnt, lba, num, devip); 3894 break; 3895 case VARIABLE_LENGTH_CMD: 3896 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION) { 3897 3898 if ((cmd[10] & 0xe0) == 0) 3899 printk(KERN_ERR 3900 "Unprotected RD/WR to DIF device\n"); 3901 3902 if (cmd[9] == READ_32) { 3903 BUG_ON(SCpnt->cmd_len < 32); 3904 goto read; 3905 } 3906 3907 if (cmd[9] == WRITE_32) { 3908 BUG_ON(SCpnt->cmd_len < 32); 3909 goto write; 3910 } 3911 } 3912 3913 mk_sense_buffer(devip, ILLEGAL_REQUEST, 3914 INVALID_FIELD_IN_CDB, 0); 3915 errsts = check_condition_result; 3916 break; 3917 3918 default: 3919 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) 3920 printk(KERN_INFO "scsi_debug: Opcode: 0x%x not " 3921 "supported\n", *cmd); 3922 errsts = check_readiness(SCpnt, 1, devip); 3923 if (errsts) 3924 break; /* Unit attention takes precedence */ 3925 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0); 3926 errsts = check_condition_result; 3927 break; 3928 } 3929 return schedule_resp(SCpnt, devip, done, errsts, 3930 (delay_override ? 0 : scsi_debug_delay)); 3931 } 3932 3933 static DEF_SCSI_QCMD(scsi_debug_queuecommand) 3934 3935 static struct scsi_host_template sdebug_driver_template = { 3936 .proc_info = scsi_debug_proc_info, 3937 .proc_name = sdebug_proc_name, 3938 .name = "SCSI DEBUG", 3939 .info = scsi_debug_info, 3940 .slave_alloc = scsi_debug_slave_alloc, 3941 .slave_configure = scsi_debug_slave_configure, 3942 .slave_destroy = scsi_debug_slave_destroy, 3943 .ioctl = scsi_debug_ioctl, 3944 .queuecommand = scsi_debug_queuecommand, 3945 .eh_abort_handler = scsi_debug_abort, 3946 .eh_bus_reset_handler = scsi_debug_bus_reset, 3947 .eh_device_reset_handler = scsi_debug_device_reset, 3948 .eh_host_reset_handler = scsi_debug_host_reset, 3949 .bios_param = scsi_debug_biosparam, 3950 .can_queue = SCSI_DEBUG_CANQUEUE, 3951 .this_id = 7, 3952 .sg_tablesize = 256, 3953 .cmd_per_lun = 16, 3954 .max_sectors = 0xffff, 3955 .use_clustering = DISABLE_CLUSTERING, 3956 .module = THIS_MODULE, 3957 }; 3958 3959 static int sdebug_driver_probe(struct device * dev) 3960 { 3961 int error = 0; 3962 struct sdebug_host_info *sdbg_host; 3963 struct Scsi_Host *hpnt; 3964 int host_prot; 3965 3966 sdbg_host = to_sdebug_host(dev); 3967 3968 sdebug_driver_template.can_queue = scsi_debug_max_queue; 3969 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host)); 3970 if (NULL == hpnt) { 3971 printk(KERN_ERR "%s: scsi_register failed\n", __func__); 3972 error = -ENODEV; 3973 return error; 3974 } 3975 3976 sdbg_host->shost = hpnt; 3977 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host; 3978 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id)) 3979 hpnt->max_id = scsi_debug_num_tgts + 1; 3980 else 3981 hpnt->max_id = scsi_debug_num_tgts; 3982 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */ 3983 3984 host_prot = 0; 3985 3986 switch (scsi_debug_dif) { 3987 3988 case SD_DIF_TYPE1_PROTECTION: 3989 host_prot = SHOST_DIF_TYPE1_PROTECTION; 3990 if (scsi_debug_dix) 3991 host_prot |= SHOST_DIX_TYPE1_PROTECTION; 3992 break; 3993 3994 case SD_DIF_TYPE2_PROTECTION: 3995 host_prot = SHOST_DIF_TYPE2_PROTECTION; 3996 if (scsi_debug_dix) 3997 host_prot |= SHOST_DIX_TYPE2_PROTECTION; 3998 break; 3999 4000 case SD_DIF_TYPE3_PROTECTION: 4001 host_prot = SHOST_DIF_TYPE3_PROTECTION; 4002 if (scsi_debug_dix) 4003 host_prot |= SHOST_DIX_TYPE3_PROTECTION; 4004 break; 4005 4006 default: 4007 if (scsi_debug_dix) 4008 host_prot |= SHOST_DIX_TYPE0_PROTECTION; 4009 break; 4010 } 4011 4012 scsi_host_set_prot(hpnt, host_prot); 4013 4014 printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n", 4015 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "", 4016 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "", 4017 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "", 4018 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "", 4019 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "", 4020 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "", 4021 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : ""); 4022 4023 if (scsi_debug_guard == 1) 4024 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP); 4025 else 4026 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC); 4027 4028 error = scsi_add_host(hpnt, &sdbg_host->dev); 4029 if (error) { 4030 printk(KERN_ERR "%s: scsi_add_host failed\n", __func__); 4031 error = -ENODEV; 4032 scsi_host_put(hpnt); 4033 } else 4034 scsi_scan_host(hpnt); 4035 4036 4037 return error; 4038 } 4039 4040 static int sdebug_driver_remove(struct device * dev) 4041 { 4042 struct sdebug_host_info *sdbg_host; 4043 struct sdebug_dev_info *sdbg_devinfo, *tmp; 4044 4045 sdbg_host = to_sdebug_host(dev); 4046 4047 if (!sdbg_host) { 4048 printk(KERN_ERR "%s: Unable to locate host info\n", 4049 __func__); 4050 return -ENODEV; 4051 } 4052 4053 scsi_remove_host(sdbg_host->shost); 4054 4055 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list, 4056 dev_list) { 4057 list_del(&sdbg_devinfo->dev_list); 4058 kfree(sdbg_devinfo); 4059 } 4060 4061 scsi_host_put(sdbg_host->shost); 4062 return 0; 4063 } 4064 4065 static int pseudo_lld_bus_match(struct device *dev, 4066 struct device_driver *dev_driver) 4067 { 4068 return 1; 4069 } 4070 4071 static struct bus_type pseudo_lld_bus = { 4072 .name = "pseudo", 4073 .match = pseudo_lld_bus_match, 4074 .probe = sdebug_driver_probe, 4075 .remove = sdebug_driver_remove, 4076 }; 4077