2 * linux/kernel/scsi_debug.c
3 * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
4 * Copyright (C) 1992 Eric Youngdale
5 * Simulate a host adapter with 2 disks attached. Do a lot of checking
6 * to make sure that we are not getting blocks mixed up, and PANIC if
7 * anything out of the ordinary is seen.
8 * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
10 * This version is more generic, simulating a variable number of disk
11 * (or disk like devices) sharing a common amount of RAM
14 * For documentation see http://www.torque.net/sg/sdebug25.html
16 * D. Gilbert (dpg) work for Magneto-Optical device test [20010421]
17 * dpg: work for devfs large number of disks [20010809]
18 * forked for lk 2.5 series [20011216, 20020101]
19 * use vmalloc() more inquiry+mode_sense [20020302]
20 * add timers for delayed responses [20020721]
21 * Patrick Mansfield <patmans@us.ibm.com> max_luns+scsi_level [20021031]
22 * Mike Anderson <andmike@us.ibm.com> sysfs work [20021118]
23 * dpg: change style of boot options to "scsi_debug.num_tgts=2" and
24 * module options to "modprobe scsi_debug num_tgts=2" [20021221]
27 #include <linux/config.h>
28 #include <linux/module.h>
30 #include <linux/kernel.h>
31 #include <linux/sched.h>
32 #include <linux/errno.h>
33 #include <linux/timer.h>
34 #include <linux/types.h>
35 #include <linux/string.h>
36 #include <linux/genhd.h>
38 #include <linux/init.h>
39 #include <linux/proc_fs.h>
40 #include <linux/smp_lock.h>
41 #include <linux/vmalloc.h>
42 #include <linux/moduleparam.h>
44 #include <linux/blkdev.h>
47 #include <scsi/scsicam.h>
49 #include <linux/stat.h>
51 #ifndef LINUX_VERSION_CODE
52 #include <linux/version.h>
55 #include "scsi_logging.h"
56 #include "scsi_debug.h"
58 static const char * scsi_debug_version_str = "Version: 1.71 (20031007)";
60 /* Additional Sense Code (ASC) used */
61 #define NO_ADDED_SENSE 0x0
62 #define UNRECOVERED_READ_ERR 0x11
63 #define INVALID_OPCODE 0x20
64 #define ADDR_OUT_OF_RANGE 0x21
65 #define INVALID_FIELD_IN_CDB 0x24
66 #define POWERON_RESET 0x29
67 #define SAVING_PARAMS_UNSUP 0x39
68 #define THRESHHOLD_EXCEEDED 0x5d
70 #define SDEBUG_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */
72 /* Default values for driver parameters */
73 #define DEF_NUM_HOST 1
74 #define DEF_NUM_TGTS 1
75 #define DEF_MAX_LUNS 1
76 /* With these defaults, this driver will make 1 host with 1 target
77 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
79 #define DEF_DEV_SIZE_MB 8
80 #define DEF_EVERY_NTH 0
82 #define DEF_SCSI_LEVEL 3
85 /* bit mask values for scsi_debug_opts */
86 #define SCSI_DEBUG_OPT_NOISE 1
87 #define SCSI_DEBUG_OPT_MEDIUM_ERR 2
88 #define SCSI_DEBUG_OPT_TIMEOUT 4
89 #define SCSI_DEBUG_OPT_RECOVERED_ERR 8
90 /* When "every_nth" > 0 then modulo "every_nth" commands:
91 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
92 * - a RECOVERED_ERROR is simulated on successful read and write
93 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
96 /* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
97 * sector on read commands: */
98 #define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
100 /* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
101 * or "peripheral device" addressing (value 0) */
102 #define SAM2_LUN_ADDRESS_METHOD 0
104 static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
105 static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
106 static int scsi_debug_opts = DEF_OPTS;
107 static int scsi_debug_every_nth = DEF_EVERY_NTH;
108 static int scsi_debug_cmnd_count = 0;
109 static int scsi_debug_delay = DEF_DELAY;
110 static int scsi_debug_max_luns = DEF_MAX_LUNS;
111 static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
112 static int scsi_debug_add_host = DEF_NUM_HOST;
114 #define DEV_READONLY(TGT) (0)
115 #define DEV_REMOVEABLE(TGT) (0)
116 #define PERIPH_DEVICE_TYPE(TGT) (TYPE_DISK);
118 static unsigned long sdebug_store_size; /* in bytes */
119 static sector_t sdebug_capacity; /* in sectors */
121 /* old BIOS stuff, kernel may get rid of them but some mode sense pages
122 may still need them */
123 static int sdebug_heads; /* heads per disk */
124 static int sdebug_cylinders_per; /* cylinders per surface */
125 static int sdebug_sectors_per; /* sectors per cylinder */
127 /* default sector size is 512 bytes, 2**9 bytes */
128 #define POW2_SECT_SIZE 9
129 #define SECT_SIZE (1 << POW2_SECT_SIZE)
130 #define SECT_SIZE_PER(TGT) SECT_SIZE
132 #define SDEBUG_SENSE_LEN 32
134 struct sdebug_dev_info {
135 struct list_head dev_list;
136 unsigned char sense_buff[SDEBUG_SENSE_LEN]; /* weak nexus */
137 unsigned int channel;
140 struct sdebug_host_info *sdbg_host;
145 struct sdebug_host_info {
146 struct list_head host_list;
147 struct Scsi_Host *shost;
149 struct list_head dev_info_list;
152 #define to_sdebug_host(d) \
153 container_of(d, struct sdebug_host_info, dev)
155 static LIST_HEAD(sdebug_host_list);
156 static spinlock_t sdebug_host_list_lock = SPIN_LOCK_UNLOCKED;
158 typedef void (* done_funct_t) (struct scsi_cmnd *);
160 struct sdebug_queued_cmd {
162 struct timer_list cmnd_timer;
163 done_funct_t done_funct;
164 struct scsi_cmnd * a_cmnd;
167 static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
169 static Scsi_Host_Template sdebug_driver_template = {
170 .proc_info = scsi_debug_proc_info,
171 .name = "SCSI DEBUG",
172 .info = scsi_debug_info,
173 .slave_alloc = scsi_debug_slave_alloc,
174 .slave_configure = scsi_debug_slave_configure,
175 .slave_destroy = scsi_debug_slave_destroy,
176 .ioctl = scsi_debug_ioctl,
177 .queuecommand = scsi_debug_queuecommand,
178 .eh_abort_handler = scsi_debug_abort,
179 .eh_bus_reset_handler = scsi_debug_bus_reset,
180 .eh_device_reset_handler = scsi_debug_device_reset,
181 .eh_host_reset_handler = scsi_debug_host_reset,
182 .bios_param = scsi_debug_biosparam,
183 .can_queue = SCSI_DEBUG_CANQUEUE,
188 .unchecked_isa_dma = 0,
189 .use_clustering = ENABLE_CLUSTERING,
190 .module = THIS_MODULE,
193 static unsigned char * fake_storep; /* ramdisk storage */
195 static unsigned char spare_buff[SDEBUG_SENSE_LEN];
197 static int num_aborts = 0;
198 static int num_dev_resets = 0;
199 static int num_bus_resets = 0;
200 static int num_host_resets = 0;
202 static spinlock_t queued_arr_lock = SPIN_LOCK_UNLOCKED;
203 static rwlock_t atomic_rw = RW_LOCK_UNLOCKED;
205 static char sdebug_proc_name[] = "scsi_debug";
207 static int sdebug_driver_probe(struct device *);
208 static int sdebug_driver_remove(struct device *);
209 static struct bus_type pseudo_lld_bus;
211 static struct device_driver sdebug_driverfs_driver = {
212 .name = sdebug_proc_name,
213 .bus = &pseudo_lld_bus,
214 .probe = sdebug_driver_probe,
215 .remove = sdebug_driver_remove,
218 static const int check_condition_result =
219 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
221 /* function declarations */
222 static int resp_inquiry(unsigned char * cmd, int target, unsigned char * buff,
223 int bufflen, struct sdebug_dev_info * devip);
224 static int resp_mode_sense(unsigned char * cmd, int target,
225 unsigned char * buff, int bufflen,
226 struct sdebug_dev_info * devip);
227 static int resp_read(struct scsi_cmnd * SCpnt, int upper_blk, int block,
228 int num, struct sdebug_dev_info * devip);
229 static int resp_write(struct scsi_cmnd * SCpnt, int upper_blk, int block,
230 int num, struct sdebug_dev_info * devip);
231 static int resp_report_luns(unsigned char * cmd, unsigned char * buff,
232 int bufflen, struct sdebug_dev_info * devip);
233 static void timer_intr_handler(unsigned long);
234 static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev);
235 static void mk_sense_buffer(struct sdebug_dev_info * devip, int key,
236 int asc, int asq, int inbandLen);
237 static int check_reset(struct scsi_cmnd * SCpnt,
238 struct sdebug_dev_info * devip);
239 static int schedule_resp(struct scsi_cmnd * cmnd,
240 struct sdebug_dev_info * devip,
241 done_funct_t done, int scsi_result, int delta_jiff);
242 static void init_all_queued(void);
243 static void stop_all_queued(void);
244 static int stop_queued_cmnd(struct scsi_cmnd * cmnd);
245 static int inquiry_evpd_83(unsigned char * arr, int dev_id_num,
246 const char * dev_id_str, int dev_id_str_len);
247 static void do_create_driverfs_files(void);
248 static void do_remove_driverfs_files(void);
250 static int sdebug_add_adapter(void);
251 static void sdebug_remove_adapter(void);
252 static struct device pseudo_primary;
253 static struct bus_type pseudo_lld_bus;
255 static unsigned char * scatg2virt(const struct scatterlist * sclp)
260 return (unsigned char *)page_address(sclp->page) +
267 int scsi_debug_queuecommand(struct scsi_cmnd * SCpnt, done_funct_t done)
269 unsigned char *cmd = (unsigned char *) SCpnt->cmnd;
270 int block, upper_blk, num;
273 int target = SCpnt->device->id;
274 int bufflen = SCpnt->request_bufflen;
276 struct sdebug_dev_info * devip = NULL;
277 unsigned char * sbuff;
278 int inj_recovered = 0;
281 return 0; /* assume mid level reprocessing command */
283 if (SCpnt->use_sg) { /* just use first element */
284 struct scatterlist *sgpnt = (struct scatterlist *)
285 SCpnt->request_buffer;
287 buff = scatg2virt(&sgpnt[0]);
288 bufflen = sgpnt[0].length;
289 /* READ and WRITE process scatterlist themselves */
292 buff = (unsigned char *) SCpnt->request_buffer;
294 buff = spare_buff; /* assume cmd moves no data */
295 bufflen = SDEBUG_SENSE_LEN;
299 if(target == sdebug_driver_template.this_id) {
300 printk(KERN_INFO "scsi_debug: initiator's id used as "
302 return schedule_resp(SCpnt, NULL, done,
303 DID_NO_CONNECT << 16, 0);
306 if (SCpnt->device->lun >= scsi_debug_max_luns)
307 return schedule_resp(SCpnt, NULL, done,
308 DID_NO_CONNECT << 16, 0);
309 devip = devInfoReg(SCpnt->device);
311 return schedule_resp(SCpnt, NULL, done,
312 DID_NO_CONNECT << 16, 0);
314 if ((scsi_debug_every_nth > 0) &&
315 (++scsi_debug_cmnd_count >= scsi_debug_every_nth)) {
316 scsi_debug_cmnd_count =0;
317 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
318 return 0; /* ignore command causing timeout */
319 else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts)
320 inj_recovered = 1; /* to reads and writes below */
324 case INQUIRY: /* mandatory */
325 errsts = resp_inquiry(cmd, target, buff, bufflen, devip);
327 case REQUEST_SENSE: /* mandatory */
328 /* Since this driver indicates autosense by placing the
329 * sense buffer in the scsi_cmnd structure in the response
330 * (when SAM_STAT_CHECK_CONDITION is set), the mid level
331 * shouldn't need to call REQUEST_SENSE */
333 sbuff = devip->sense_buff;
334 memcpy(buff, sbuff, (bufflen < SDEBUG_SENSE_LEN) ?
335 bufflen : SDEBUG_SENSE_LEN);
336 mk_sense_buffer(devip, 0, NO_ADDED_SENSE, 0, 7);
338 memset(buff, 0, bufflen);
343 errsts = check_reset(SCpnt, devip);
345 case ALLOW_MEDIUM_REMOVAL:
346 if ((errsts = check_reset(SCpnt, devip)))
348 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
349 printk("\tMedium removal %s\n",
350 cmd[4] ? "inhibited" : "enabled");
352 case SEND_DIAGNOSTIC: /* mandatory */
353 memset(buff, 0, bufflen);
355 case TEST_UNIT_READY: /* mandatory */
356 memset(buff, 0, bufflen);
359 errsts = check_reset(SCpnt, devip);
360 memset(buff, 0, bufflen);
363 errsts = check_reset(SCpnt, devip);
364 memset(buff, 0, bufflen);
367 errsts = check_reset(SCpnt, devip);
368 memset(buff, 0, bufflen);
371 errsts = check_reset(SCpnt, devip);
372 memset(buff, 0, bufflen);
375 errsts = check_reset(SCpnt, devip);
376 memset(buff, 0, bufflen);
378 capac = (unsigned long)sdebug_capacity - 1;
379 buff[0] = (capac >> 24);
380 buff[1] = (capac >> 16) & 0xff;
381 buff[2] = (capac >> 8) & 0xff;
382 buff[3] = capac & 0xff;
383 buff[6] = (SECT_SIZE_PER(target) >> 8) & 0xff;
384 buff[7] = SECT_SIZE_PER(target) & 0xff;
391 if ((errsts = check_reset(SCpnt, devip)))
394 if ((*cmd) == READ_16) {
395 upper_blk = cmd[5] + (cmd[4] << 8) +
396 (cmd[3] << 16) + (cmd[2] << 24);
397 block = cmd[9] + (cmd[8] << 8) +
398 (cmd[7] << 16) + (cmd[6] << 24);
399 num = cmd[13] + (cmd[12] << 8) +
400 (cmd[11] << 16) + (cmd[10] << 24);
401 } else if ((*cmd) == READ_12) {
402 block = cmd[5] + (cmd[4] << 8) +
403 (cmd[3] << 16) + (cmd[2] << 24);
404 num = cmd[9] + (cmd[8] << 8) +
405 (cmd[7] << 16) + (cmd[6] << 24);
406 } else if ((*cmd) == READ_10) {
407 block = cmd[5] + (cmd[4] << 8) +
408 (cmd[3] << 16) + (cmd[2] << 24);
409 num = cmd[8] + (cmd[7] << 8);
411 block = cmd[3] + (cmd[2] << 8) +
412 ((cmd[1] & 0x1f) << 16);
415 errsts = resp_read(SCpnt, upper_blk, block, num, devip);
416 if (inj_recovered && (0 == errsts)) {
417 mk_sense_buffer(devip, RECOVERED_ERROR,
418 THRESHHOLD_EXCEEDED, 0, 18);
419 errsts = check_condition_result;
423 errsts = resp_report_luns(cmd, buff, bufflen, devip);
429 if ((errsts = check_reset(SCpnt, devip)))
432 if ((*cmd) == WRITE_16) {
433 upper_blk = cmd[5] + (cmd[4] << 8) +
434 (cmd[3] << 16) + (cmd[2] << 24);
435 block = cmd[9] + (cmd[8] << 8) +
436 (cmd[7] << 16) + (cmd[6] << 24);
437 num = cmd[13] + (cmd[12] << 8) +
438 (cmd[11] << 16) + (cmd[10] << 24);
439 } else if ((*cmd) == WRITE_12) {
440 block = cmd[5] + (cmd[4] << 8) +
441 (cmd[3] << 16) + (cmd[2] << 24);
442 num = cmd[9] + (cmd[8] << 8) +
443 (cmd[7] << 16) + (cmd[6] << 24);
444 } else if ((*cmd) == WRITE_10) {
445 block = cmd[5] + (cmd[4] << 8) +
446 (cmd[3] << 16) + (cmd[2] << 24);
447 num = cmd[8] + (cmd[7] << 8);
449 block = cmd[3] + (cmd[2] << 8) +
450 ((cmd[1] & 0x1f) << 16);
453 errsts = resp_write(SCpnt, upper_blk, block, num, devip);
454 if (inj_recovered && (0 == errsts)) {
455 mk_sense_buffer(devip, RECOVERED_ERROR,
456 THRESHHOLD_EXCEEDED, 0, 18);
457 errsts = check_condition_result;
462 errsts = resp_mode_sense(cmd, target, buff, bufflen, devip);
464 case SYNCHRONIZE_CACHE:
465 memset(buff, 0, bufflen);
468 if ((errsts = check_reset(SCpnt, devip)))
470 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0, 18);
471 errsts = check_condition_result;
474 return schedule_resp(SCpnt, devip, done, errsts, scsi_debug_delay);
477 static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void *arg)
479 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
480 printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd);
483 /* return -ENOTTY; // correct return but upsets fdisk */
486 static int check_reset(struct scsi_cmnd * SCpnt, struct sdebug_dev_info * devip)
490 mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0, 18);
491 return check_condition_result;
496 #define SDEBUG_LONG_INQ_SZ 58
497 #define SDEBUG_MAX_INQ_ARR_SZ 128
499 static const char * vendor_id = "Linux ";
500 static const char * product_id = "scsi_debug ";
501 static const char * product_rev = "0004";
503 static int inquiry_evpd_83(unsigned char * arr, int dev_id_num,
504 const char * dev_id_str, int dev_id_str_len)
508 /* Two identification descriptors: */
509 /* T10 vendor identifier field format (faked) */
510 arr[0] = 0x2; /* ASCII */
513 memcpy(&arr[4], vendor_id, 8);
514 memcpy(&arr[12], product_id, 16);
515 memcpy(&arr[28], dev_id_str, dev_id_str_len);
516 num = 8 + 16 + dev_id_str_len;
519 /* NAA IEEE registered identifier (faked) */
520 arr[num] = 0x1; /* binary */
524 arr[num + 4] = 0x51; /* ieee company id=0x123456 (faked) */
528 arr[num + 8] = (dev_id_num >> 24);
529 arr[num + 9] = (dev_id_num >> 16) & 0xff;
530 arr[num + 10] = (dev_id_num >> 8) & 0xff;
531 arr[num + 11] = dev_id_num & 0xff;
535 static int resp_inquiry(unsigned char * cmd, int target, unsigned char * buff,
536 int bufflen, struct sdebug_dev_info * devip)
538 unsigned char pq_pdt;
539 unsigned char arr[SDEBUG_MAX_INQ_ARR_SZ];
540 int min_len = bufflen > SDEBUG_MAX_INQ_ARR_SZ ?
541 SDEBUG_MAX_INQ_ARR_SZ : bufflen;
543 if (bufflen < cmd[4])
544 printk(KERN_INFO "scsi_debug: inquiry: bufflen=%d "
545 "< alloc_length=%d\n", bufflen, (int)cmd[4]);
546 memset(buff, 0, bufflen);
547 memset(arr, 0, SDEBUG_MAX_INQ_ARR_SZ);
548 pq_pdt = PERIPH_DEVICE_TYPE(target);
550 if (0x2 & cmd[1]) { /* CMDDT bit set */
551 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
553 return check_condition_result;
554 } else if (0x1 & cmd[1]) { /* EVPD bit set */
558 dev_id_num = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
559 (devip->target * 1000) + devip->lun;
560 len = scnprintf(dev_id_str, 6, "%d", dev_id_num);
561 if (0 == cmd[2]) { /* supported vital product data pages */
563 arr[4] = 0x0; /* this page */
564 arr[5] = 0x80; /* unit serial number */
565 arr[6] = 0x83; /* device identification */
566 } else if (0x80 == cmd[2]) { /* unit serial number */
569 memcpy(&arr[4], dev_id_str, len);
570 } else if (0x83 == cmd[2]) { /* device identification */
572 arr[3] = inquiry_evpd_83(&arr[4], dev_id_num,
575 /* Illegal request, invalid field in cdb */
576 mk_sense_buffer(devip, ILLEGAL_REQUEST,
577 INVALID_FIELD_IN_CDB, 0, 18);
578 return check_condition_result;
580 memcpy(buff, arr, min_len);
583 /* drops through here for a standard inquiry */
584 arr[1] = DEV_REMOVEABLE(target) ? 0x80 : 0; /* Removable disk */
585 arr[2] = scsi_debug_scsi_level;
586 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
587 arr[7] = 0x3a; /* claim: WBUS16, SYNC, LINKED + CMDQUE */
588 memcpy(&arr[8], vendor_id, 8);
589 memcpy(&arr[16], product_id, 16);
590 memcpy(&arr[32], product_rev, 4);
591 memcpy(buff, arr, min_len);
595 /* <<Following mode page info copied from ST318451LW>> */
597 static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
598 { /* Read-Write Error Recovery page for mode_sense */
599 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
602 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
604 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
605 return sizeof(err_recov_pg);
608 static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
609 { /* Disconnect-Reconnect page for mode_sense */
610 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
611 0, 0, 0, 0, 0, 0, 0, 0};
613 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
615 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
616 return sizeof(disconnect_pg);
619 static int resp_format_pg(unsigned char * p, int pcontrol, int target)
620 { /* Format device page for mode_sense */
621 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
622 0, 0, 0, 0, 0, 0, 0, 0,
623 0, 0, 0, 0, 0x40, 0, 0, 0};
625 memcpy(p, format_pg, sizeof(format_pg));
626 p[10] = (sdebug_sectors_per >> 8) & 0xff;
627 p[11] = sdebug_sectors_per & 0xff;
628 p[12] = (SECT_SIZE >> 8) & 0xff;
629 p[13] = SECT_SIZE & 0xff;
630 if (DEV_REMOVEABLE(target))
631 p[20] |= 0x20; /* should agree with INQUIRY */
633 memset(p + 2, 0, sizeof(format_pg) - 2);
634 return sizeof(format_pg);
637 static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
638 { /* Caching page for mode_sense */
639 unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
640 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
642 memcpy(p, caching_pg, sizeof(caching_pg));
644 memset(p + 2, 0, sizeof(caching_pg) - 2);
645 return sizeof(caching_pg);
648 static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
649 { /* Control mode page for mode_sense */
650 unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
653 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
655 memset(p + 2, 0, sizeof(ctrl_m_pg) - 2);
656 return sizeof(ctrl_m_pg);
659 static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
660 { /* Informational Exceptions control mode page for mode_sense */
661 unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
663 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
665 memset(p + 2, 0, sizeof(iec_m_pg) - 2);
666 return sizeof(iec_m_pg);
669 #define SDEBUG_MAX_MSENSE_SZ 256
671 static int resp_mode_sense(unsigned char * cmd, int target,
672 unsigned char * buff, int bufflen,
673 struct sdebug_dev_info * devip)
677 unsigned char dev_spec;
678 int alloc_len, msense_6, offset, len;
680 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
681 int min_len = bufflen > SDEBUG_MAX_MSENSE_SZ ?
682 SDEBUG_MAX_MSENSE_SZ : bufflen;
684 SCSI_LOG_LLQUEUE(3, printk("Mode sense ...(%p %d)\n", buff, bufflen));
686 pcontrol = (cmd[2] & 0xc0) >> 6;
687 pcode = cmd[2] & 0x3f;
688 msense_6 = (MODE_SENSE == cmd[0]);
689 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
690 /* printk(KERN_INFO "msense: dbd=%d pcontrol=%d pcode=%d "
691 "msense_6=%d alloc_len=%d\n", dbd, pcontrol, pcode, "
692 "msense_6, alloc_len); */
693 if (bufflen < alloc_len)
694 printk(KERN_INFO "scsi_debug: mode_sense: bufflen=%d "
695 "< alloc_length=%d\n", bufflen, alloc_len);
696 memset(buff, 0, bufflen);
697 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
698 if (0x3 == pcontrol) { /* Saving values not supported */
699 mk_sense_buffer(devip, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP,
701 return check_condition_result;
703 dev_spec = DEV_READONLY(target) ? 0x80 : 0x0;
714 case 0x1: /* Read-Write error recovery page, direct access */
715 len = resp_err_recov_pg(ap, pcontrol, target);
718 case 0x2: /* Disconnect-Reconnect page, all devices */
719 len = resp_disconnect_pg(ap, pcontrol, target);
722 case 0x3: /* Format device page, direct access */
723 len = resp_format_pg(ap, pcontrol, target);
726 case 0x8: /* Caching page, direct access */
727 len = resp_caching_pg(ap, pcontrol, target);
730 case 0xa: /* Control Mode page, all devices */
731 len = resp_ctrl_m_pg(ap, pcontrol, target);
734 case 0x1c: /* Informational Exceptions Mode page, all devices */
735 len = resp_iec_m_pg(ap, pcontrol, target);
738 case 0x3f: /* Read all Mode pages */
739 len = resp_err_recov_pg(ap, pcontrol, target);
740 len += resp_disconnect_pg(ap + len, pcontrol, target);
741 len += resp_format_pg(ap + len, pcontrol, target);
742 len += resp_caching_pg(ap + len, pcontrol, target);
743 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
744 len += resp_iec_m_pg(ap + len, pcontrol, target);
748 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
750 return check_condition_result;
756 arr[0] = (offset >> 8) & 0xff;
757 arr[1] = offset & 0xff;
759 memcpy(buff, arr, min_len);
763 static int resp_read(struct scsi_cmnd * SCpnt, int upper_blk, int block,
764 int num, struct sdebug_dev_info * devip)
766 unsigned char *buff = (unsigned char *) SCpnt->request_buffer;
768 struct scatterlist *sgpnt = NULL;
769 int bufflen = SCpnt->request_bufflen;
770 unsigned long iflags;
772 if (upper_blk || (block + num > sdebug_capacity)) {
773 mk_sense_buffer(devip, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE,
775 return check_condition_result;
777 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
778 (block <= OPT_MEDIUM_ERR_ADDR) &&
779 ((block + num) > OPT_MEDIUM_ERR_ADDR)) {
780 mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR,
782 /* claim unrecoverable read error */
783 return check_condition_result;
785 read_lock_irqsave(&atomic_rw, iflags);
788 /* printk(KERN_INFO "scsi_debug_read: block=%d, tot_bufflen=%d\n",
792 sgpnt = (struct scatterlist *) buff;
793 buff = scatg2virt(&sgpnt[sgcount]);
794 bufflen = sgpnt[sgcount].length;
797 memcpy(buff, fake_storep + (block * SECT_SIZE), bufflen);
800 block += bufflen >> POW2_SECT_SIZE;
803 buff = scatg2virt(&sgpnt[sgcount]);
804 bufflen = sgpnt[sgcount].length;
806 } else if (nbytes > 0)
807 printk(KERN_WARNING "scsi_debug:resp_read: unexpected "
808 "nbytes=%d\n", nbytes);
810 read_unlock_irqrestore(&atomic_rw, iflags);
814 static int resp_write(struct scsi_cmnd * SCpnt, int upper_blk, int block,
815 int num, struct sdebug_dev_info * devip)
817 unsigned char *buff = (unsigned char *) SCpnt->request_buffer;
819 struct scatterlist *sgpnt = NULL;
820 int bufflen = SCpnt->request_bufflen;
821 unsigned long iflags;
823 if (upper_blk || (block + num > sdebug_capacity)) {
824 mk_sense_buffer(devip, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE,
826 return check_condition_result;
829 write_lock_irqsave(&atomic_rw, iflags);
834 sgpnt = (struct scatterlist *) buff;
835 buff = scatg2virt(&sgpnt[sgcount]);
836 bufflen = sgpnt[sgcount].length;
839 memcpy(fake_storep + (block * SECT_SIZE), buff, bufflen);
843 block += bufflen >> POW2_SECT_SIZE;
846 buff = scatg2virt(&sgpnt[sgcount]);
847 bufflen = sgpnt[sgcount].length;
849 } else if (nbytes > 0)
850 printk(KERN_WARNING "scsi_debug:resp_write: "
851 "unexpected nbytes=%d\n", nbytes);
853 write_unlock_irqrestore(&atomic_rw, iflags);
857 static int resp_report_luns(unsigned char * cmd, unsigned char * buff,
858 int bufflen, struct sdebug_dev_info * devip)
860 unsigned int alloc_len;
861 int lun_cnt, i, upper;
862 int select_report = (int)cmd[2];
863 struct scsi_lun *one_lun;
865 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
866 if ((alloc_len < 16) || (select_report > 2)) {
867 mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
869 return check_condition_result;
871 if (bufflen > 8) { /* can produce response with up to 16k luns
872 (lun 0 to lun 16383) */
873 memset(buff, 0, bufflen);
874 lun_cnt = scsi_debug_max_luns;
875 buff[2] = ((sizeof(struct scsi_lun) * lun_cnt) >> 8) & 0xff;
876 buff[3] = (sizeof(struct scsi_lun) * lun_cnt) & 0xff;
877 lun_cnt = min((int)((bufflen - 8) / sizeof(struct scsi_lun)),
879 one_lun = (struct scsi_lun *) &buff[8];
880 for (i = 0; i < lun_cnt; i++) {
881 upper = (i >> 8) & 0x3f;
883 one_lun[i].scsi_lun[0] =
884 (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
885 one_lun[i].scsi_lun[1] = i & 0xff;
891 /* When timer goes off this function is called. */
892 static void timer_intr_handler(unsigned long indx)
894 struct sdebug_queued_cmd * sqcp;
895 unsigned long iflags;
897 if (indx >= SCSI_DEBUG_CANQUEUE) {
898 printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too "
902 spin_lock_irqsave(&queued_arr_lock, iflags);
903 sqcp = &queued_arr[(int)indx];
904 if (! sqcp->in_use) {
905 printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected "
907 spin_unlock_irqrestore(&queued_arr_lock, iflags);
911 if (sqcp->done_funct) {
912 sqcp->a_cmnd->result = sqcp->scsi_result;
913 sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */
915 sqcp->done_funct = NULL;
916 spin_unlock_irqrestore(&queued_arr_lock, iflags);
919 static int scsi_debug_slave_alloc(struct scsi_device * sdp)
921 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
922 printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %u>\n",
923 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
927 static int scsi_debug_slave_configure(struct scsi_device * sdp)
929 struct sdebug_dev_info * devip;
931 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
932 printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %u>\n",
933 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
934 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
935 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
936 devip = devInfoReg(sdp);
937 sdp->hostdata = devip;
938 if (sdp->host->cmd_per_lun)
939 scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING,
940 sdp->host->cmd_per_lun);
944 static void scsi_debug_slave_destroy(struct scsi_device * sdp)
946 struct sdebug_dev_info * devip =
947 (struct sdebug_dev_info *)sdp->hostdata;
949 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
950 printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %u>\n",
951 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
953 /* make this slot avaliable for re-use */
955 sdp->hostdata = NULL;
959 static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
961 struct sdebug_host_info * sdbg_host;
962 struct sdebug_dev_info * open_devip = NULL;
963 struct sdebug_dev_info * devip =
964 (struct sdebug_dev_info *)sdev->hostdata;
968 sdbg_host = *(struct sdebug_host_info **) sdev->host->hostdata;
970 printk(KERN_ERR "Host info NULL\n");
973 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
974 if ((devip->used) && (devip->channel == sdev->channel) &&
975 (devip->target == sdev->id) &&
976 (devip->lun == sdev->lun))
979 if ((!devip->used) && (!open_devip))
984 open_devip->channel = sdev->channel;
985 open_devip->target = sdev->id;
986 open_devip->lun = sdev->lun;
987 open_devip->sdbg_host = sdbg_host;
988 open_devip->reset = 1;
989 open_devip->used = 1;
990 memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN);
991 open_devip->sense_buff[0] = 0x70;
997 static void mk_sense_buffer(struct sdebug_dev_info * devip, int key,
998 int asc, int asq, int inbandLen)
1000 unsigned char * sbuff;
1002 sbuff = devip->sense_buff;
1003 memset(sbuff, 0, SDEBUG_SENSE_LEN);
1004 if (inbandLen > SDEBUG_SENSE_LEN)
1005 inbandLen = SDEBUG_SENSE_LEN;
1008 sbuff[7] = (inbandLen > 7) ? (inbandLen - 8) : 0;
1013 static int scsi_debug_abort(struct scsi_cmnd * SCpnt)
1015 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
1016 printk(KERN_INFO "scsi_debug: abort\n");
1018 stop_queued_cmnd(SCpnt);
1022 static int scsi_debug_biosparam(struct scsi_device *sdev,
1023 struct block_device * bdev, sector_t capacity, int *info)
1028 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
1029 printk(KERN_INFO "scsi_debug: biosparam\n");
1030 buf = scsi_bios_ptable(bdev);
1032 res = scsi_partsize(buf, capacity,
1033 &info[2], &info[0], &info[1]);
1038 info[0] = sdebug_heads;
1039 info[1] = sdebug_sectors_per;
1040 info[2] = sdebug_cylinders_per;
1044 static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
1046 struct sdebug_dev_info * devip;
1048 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
1049 printk(KERN_INFO "scsi_debug: device_reset\n");
1052 devip = devInfoReg(SCpnt->device);
1059 static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
1061 struct sdebug_host_info *sdbg_host;
1062 struct sdebug_dev_info * dev_info;
1063 struct scsi_device * sdp;
1064 struct Scsi_Host * hp;
1066 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
1067 printk(KERN_INFO "scsi_debug: bus_reset\n");
1069 if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) {
1070 sdbg_host = *(struct sdebug_host_info **) hp->hostdata;
1072 list_for_each_entry(dev_info,
1073 &sdbg_host->dev_info_list,
1075 dev_info->reset = 1;
1081 static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
1083 struct sdebug_host_info * sdbg_host;
1084 struct sdebug_dev_info * dev_info;
1086 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
1087 printk(KERN_INFO "scsi_debug: host_reset\n");
1089 spin_lock(&sdebug_host_list_lock);
1090 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
1091 list_for_each_entry(dev_info, &sdbg_host->dev_info_list,
1093 dev_info->reset = 1;
1095 spin_unlock(&sdebug_host_list_lock);
1100 /* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */
1101 static int stop_queued_cmnd(struct scsi_cmnd * cmnd)
1103 unsigned long iflags;
1105 struct sdebug_queued_cmd * sqcp;
1107 spin_lock_irqsave(&queued_arr_lock, iflags);
1108 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
1109 sqcp = &queued_arr[k];
1110 if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) {
1111 del_timer_sync(&sqcp->cmnd_timer);
1113 sqcp->a_cmnd = NULL;
1117 spin_unlock_irqrestore(&queued_arr_lock, iflags);
1118 return (k < SCSI_DEBUG_CANQUEUE) ? 1 : 0;
1121 /* Deletes (stops) timers of all queued commands */
1122 static void stop_all_queued(void)
1124 unsigned long iflags;
1126 struct sdebug_queued_cmd * sqcp;
1128 spin_lock_irqsave(&queued_arr_lock, iflags);
1129 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
1130 sqcp = &queued_arr[k];
1131 if (sqcp->in_use && sqcp->a_cmnd) {
1132 del_timer_sync(&sqcp->cmnd_timer);
1134 sqcp->a_cmnd = NULL;
1137 spin_unlock_irqrestore(&queued_arr_lock, iflags);
1140 /* Initializes timers in queued array */
1141 static void init_all_queued(void)
1143 unsigned long iflags;
1145 struct sdebug_queued_cmd * sqcp;
1147 spin_lock_irqsave(&queued_arr_lock, iflags);
1148 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
1149 sqcp = &queued_arr[k];
1150 init_timer(&sqcp->cmnd_timer);
1152 sqcp->a_cmnd = NULL;
1154 spin_unlock_irqrestore(&queued_arr_lock, iflags);
1157 static int schedule_resp(struct scsi_cmnd * cmnd,
1158 struct sdebug_dev_info * devip,
1159 done_funct_t done, int scsi_result, int delta_jiff)
1163 if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) {
1164 printk(KERN_INFO "scsi_debug: cmd ");
1165 for (k = 0, num = cmnd->cmd_len; k < num; ++k)
1166 printk("%02x ", (int)cmnd->cmnd[k]);
1169 struct scsi_device * sdp = cmnd->device;
1171 printk(KERN_INFO "scsi_debug: ... <%u %u %u %u> "
1172 "non-zero result=0x%x\n", sdp->host->host_no,
1173 sdp->channel, sdp->id, sdp->lun, scsi_result);
1176 if (cmnd && devip) {
1177 /* simulate autosense by this driver */
1178 if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff))
1179 memcpy(cmnd->sense_buffer, devip->sense_buff,
1180 (SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ?
1181 SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE);
1183 if (delta_jiff <= 0) {
1185 cmnd->result = scsi_result;
1190 unsigned long iflags;
1192 struct sdebug_queued_cmd * sqcp = NULL;
1194 spin_lock_irqsave(&queued_arr_lock, iflags);
1195 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
1196 sqcp = &queued_arr[k];
1200 if (k >= SCSI_DEBUG_CANQUEUE) {
1201 spin_unlock_irqrestore(&queued_arr_lock, iflags);
1202 printk(KERN_WARNING "scsi_debug: can_queue exceeded\n");
1203 return 1; /* report busy to mid level */
1206 sqcp->a_cmnd = cmnd;
1207 sqcp->scsi_result = scsi_result;
1208 sqcp->done_funct = done;
1209 sqcp->cmnd_timer.function = timer_intr_handler;
1210 sqcp->cmnd_timer.data = k;
1211 sqcp->cmnd_timer.expires = jiffies + delta_jiff;
1212 add_timer(&sqcp->cmnd_timer);
1213 spin_unlock_irqrestore(&queued_arr_lock, iflags);
1220 /* Set 'perm' (4th argument) to 0 to disable module_param's definition
1221 * of sysfs parameters (which module_param doesn't yet support).
1222 * Sysfs parameters defined explicitly below.
1224 module_param_named(num_tgts, scsi_debug_num_tgts, int, 0);
1225 module_param_named(max_luns, scsi_debug_max_luns, int, 0);
1226 module_param_named(scsi_level, scsi_debug_scsi_level, int, 0);
1227 module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, 0);
1228 module_param_named(opts, scsi_debug_opts, int, 0); /* perm=0644 */
1229 module_param_named(every_nth, scsi_debug_every_nth, int, 0);
1230 module_param_named(delay, scsi_debug_delay, int, 0); /* perm=0644 */
1231 module_param_named(add_host, scsi_debug_add_host, int, 0); /* perm=0644 */
1233 MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
1234 MODULE_DESCRIPTION("SCSI debug adapter driver");
1235 MODULE_LICENSE("GPL");
1237 MODULE_PARM_DESC(num_tgts, "number of SCSI targets per host to simulate");
1238 MODULE_PARM_DESC(max_luns, "number of SCSI LUNs per target to simulate");
1239 MODULE_PARM_DESC(scsi_level, "SCSI level to simulate");
1240 MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs");
1241 MODULE_PARM_DESC(opts, "1->noise, 2->medium_error, 4->...");
1242 MODULE_PARM_DESC(every_nth, "timeout every nth command(def=100)");
1243 MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)");
1244 MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
1247 static char sdebug_info[256];
1249 static const char * scsi_debug_info(struct Scsi_Host * shp)
1251 sprintf(sdebug_info, "scsi_debug, %s, num_tgts=%d, "
1252 "dev_size_mb=%d, opts=0x%x", scsi_debug_version_str,
1253 scsi_debug_num_tgts, scsi_debug_dev_size_mb,
1258 /* scsi_debug_proc_info
1259 * Used if the driver currently has no own support for /proc/scsi
1261 static int scsi_debug_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset,
1262 int length, int inout)
1264 int len, pos, begin;
1267 orig_length = length;
1271 int minLen = length > 15 ? 15 : length;
1273 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1275 memcpy(arr, buffer, minLen);
1277 if (1 != sscanf(arr, "%d", &pos))
1279 scsi_debug_opts = pos;
1280 if (scsi_debug_every_nth > 0)
1281 scsi_debug_cmnd_count = 0;
1285 pos = len = sprintf(buffer, "scsi_debug adapter driver, %s\n"
1286 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
1287 "every_nth=%d(curr:%d)\n"
1288 "delay=%d, max_luns=%d, scsi_level=%d\n"
1289 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
1290 "number of aborts=%d, device_reset=%d, bus_resets=%d, "
1292 scsi_debug_version_str, scsi_debug_num_tgts,
1293 scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth,
1294 scsi_debug_cmnd_count, scsi_debug_delay,
1295 scsi_debug_max_luns, scsi_debug_scsi_level,
1296 SECT_SIZE, sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
1297 num_aborts, num_dev_resets, num_bus_resets, num_host_resets);
1302 *start = buffer + (offset - begin); /* Start of wanted data */
1303 len -= (offset - begin);
1309 static ssize_t sdebug_delay_show(struct device_driver * ddp, char * buf)
1311 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
1314 static ssize_t sdebug_delay_store(struct device_driver * ddp,
1315 const char * buf, size_t count)
1320 if (1 == sscanf(buf, "%10s", work)) {
1321 if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) {
1322 scsi_debug_delay = delay;
1328 DRIVER_ATTR(delay, S_IRUGO | S_IWUSR, sdebug_delay_show,
1331 static ssize_t sdebug_opts_show(struct device_driver * ddp, char * buf)
1333 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
1336 static ssize_t sdebug_opts_store(struct device_driver * ddp,
1337 const char * buf, size_t count)
1342 if (1 == sscanf(buf, "%10s", work)) {
1343 if (0 == strnicmp(work,"0x", 2)) {
1344 if (1 == sscanf(&work[2], "%x", &opts))
1347 if (1 == sscanf(work, "%d", &opts))
1353 scsi_debug_opts = opts;
1354 scsi_debug_cmnd_count = 0;
1357 DRIVER_ATTR(opts, S_IRUGO | S_IWUSR, sdebug_opts_show,
1360 static ssize_t sdebug_num_tgts_show(struct device_driver * ddp, char * buf)
1362 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
1364 static ssize_t sdebug_num_tgts_store(struct device_driver * ddp,
1365 const char * buf, size_t count)
1369 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
1370 scsi_debug_num_tgts = n;
1375 DRIVER_ATTR(num_tgts, S_IRUGO | S_IWUSR, sdebug_num_tgts_show,
1376 sdebug_num_tgts_store)
1378 static ssize_t sdebug_dev_size_mb_show(struct device_driver * ddp, char * buf)
1380 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
1382 DRIVER_ATTR(dev_size_mb, S_IRUGO, sdebug_dev_size_mb_show, NULL)
1384 static ssize_t sdebug_every_nth_show(struct device_driver * ddp, char * buf)
1386 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
1388 static ssize_t sdebug_every_nth_store(struct device_driver * ddp,
1389 const char * buf, size_t count)
1393 if ((count > 0) && (1 == sscanf(buf, "%d", &nth)) && (nth >= 0)) {
1394 scsi_debug_every_nth = nth;
1395 scsi_debug_cmnd_count = 0;
1400 DRIVER_ATTR(every_nth, S_IRUGO | S_IWUSR, sdebug_every_nth_show,
1401 sdebug_every_nth_store)
1403 static ssize_t sdebug_max_luns_show(struct device_driver * ddp, char * buf)
1405 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
1407 static ssize_t sdebug_max_luns_store(struct device_driver * ddp,
1408 const char * buf, size_t count)
1412 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
1413 scsi_debug_max_luns = n;
1418 DRIVER_ATTR(max_luns, S_IRUGO | S_IWUSR, sdebug_max_luns_show,
1419 sdebug_max_luns_store)
1421 static ssize_t sdebug_scsi_level_show(struct device_driver * ddp, char * buf)
1423 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
1425 DRIVER_ATTR(scsi_level, S_IRUGO, sdebug_scsi_level_show, NULL)
1427 static ssize_t sdebug_add_host_show(struct device_driver * ddp, char * buf)
1429 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
1432 static ssize_t sdebug_add_host_store(struct device_driver * ddp,
1433 const char * buf, size_t count)
1438 if (1 != sscanf(buf, "%10s", work))
1440 { /* temporary hack around sscanf() problem with -ve nums */
1445 if (1 != sscanf(work + neg, "%d", &delta_hosts))
1448 delta_hosts = -delta_hosts;
1450 if (delta_hosts > 0) {
1452 sdebug_add_adapter();
1453 } while (--delta_hosts);
1454 } else if (delta_hosts < 0) {
1456 sdebug_remove_adapter();
1457 } while (++delta_hosts);
1461 DRIVER_ATTR(add_host, S_IRUGO | S_IWUSR, sdebug_add_host_show,
1462 sdebug_add_host_store)
1464 static void do_create_driverfs_files()
1466 driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay);
1467 driver_create_file(&sdebug_driverfs_driver, &driver_attr_opts);
1468 driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
1469 driver_create_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
1470 driver_create_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
1471 driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
1472 driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
1473 driver_create_file(&sdebug_driverfs_driver, &driver_attr_add_host);
1476 static void do_remove_driverfs_files()
1478 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host);
1479 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
1480 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
1481 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
1482 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
1483 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
1484 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_opts);
1485 driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay);
1488 static int __init scsi_debug_init(void)
1494 sdebug_store_size = (unsigned long)scsi_debug_dev_size_mb * 1048576;
1495 sdebug_capacity = sdebug_store_size / SECT_SIZE;
1497 /* play around with geometry, don't waste too much on track 0 */
1499 sdebug_sectors_per = 32;
1500 if (scsi_debug_dev_size_mb >= 16)
1502 else if (scsi_debug_dev_size_mb >= 256)
1504 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
1505 (sdebug_sectors_per * sdebug_heads);
1506 if (sdebug_cylinders_per >= 1024) {
1507 /* other LLDs do this; implies >= 1GB ram disk ... */
1509 sdebug_sectors_per = 63;
1510 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
1511 (sdebug_sectors_per * sdebug_heads);
1514 sz = sdebug_store_size;
1515 fake_storep = vmalloc(sz);
1516 if (NULL == fake_storep) {
1517 printk(KERN_ERR "scsi_debug_init: out of memory, 1\n");
1520 memset(fake_storep, 0, sz);
1524 device_register(&pseudo_primary);
1525 bus_register(&pseudo_lld_bus);
1526 driver_register(&sdebug_driverfs_driver);
1527 do_create_driverfs_files();
1529 sdebug_driver_template.proc_name = (char *)sdebug_proc_name;
1531 host_to_add = scsi_debug_add_host;
1532 scsi_debug_add_host = 0;
1534 for (k = 0; k < host_to_add; k++) {
1535 if (sdebug_add_adapter()) {
1536 printk(KERN_ERR "scsi_debug_init: "
1537 "sdebug_add_adapter failed k=%d\n", k);
1542 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
1543 printk(KERN_INFO "scsi_debug_init: built %d host(s)\n",
1544 scsi_debug_add_host);
1549 static void __exit scsi_debug_exit(void)
1551 int k = scsi_debug_add_host;
1555 sdebug_remove_adapter();
1556 do_remove_driverfs_files();
1557 driver_unregister(&sdebug_driverfs_driver);
1558 bus_unregister(&pseudo_lld_bus);
1559 device_unregister(&pseudo_primary);
1564 device_initcall(scsi_debug_init);
1565 module_exit(scsi_debug_exit);
1567 void pseudo_0_release(struct device * dev)
1569 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
1570 printk(KERN_INFO "scsi_debug: pseudo_0_release() called\n");
1573 static struct device pseudo_primary = {
1574 .bus_id = "pseudo_0",
1575 .release = pseudo_0_release,
1578 static int pseudo_lld_bus_match(struct device *dev,
1579 struct device_driver *dev_driver)
1584 static struct bus_type pseudo_lld_bus = {
1586 .match = pseudo_lld_bus_match,
1589 static void sdebug_release_adapter(struct device * dev)
1591 struct sdebug_host_info *sdbg_host;
1593 sdbg_host = to_sdebug_host(dev);
1597 static int sdebug_add_adapter()
1599 int k, devs_per_host;
1601 struct sdebug_host_info *sdbg_host;
1602 struct sdebug_dev_info *sdbg_devinfo;
1603 struct list_head *lh, *lh_sf;
1605 sdbg_host = kmalloc(sizeof(*sdbg_host),GFP_KERNEL);
1607 if (NULL == sdbg_host) {
1608 printk(KERN_ERR "%s: out of memory at line %d\n",
1609 __FUNCTION__, __LINE__);
1613 memset(sdbg_host, 0, sizeof(*sdbg_host));
1614 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
1616 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
1617 for (k = 0; k < devs_per_host; k++) {
1618 sdbg_devinfo = kmalloc(sizeof(*sdbg_devinfo),GFP_KERNEL);
1619 if (NULL == sdbg_devinfo) {
1620 printk(KERN_ERR "%s: out of memory at line %d\n",
1621 __FUNCTION__, __LINE__);
1625 memset(sdbg_devinfo, 0, sizeof(*sdbg_devinfo));
1626 sdbg_devinfo->sdbg_host = sdbg_host;
1627 list_add_tail(&sdbg_devinfo->dev_list,
1628 &sdbg_host->dev_info_list);
1631 spin_lock(&sdebug_host_list_lock);
1632 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
1633 spin_unlock(&sdebug_host_list_lock);
1635 sdbg_host->dev.bus = &pseudo_lld_bus;
1636 sdbg_host->dev.parent = &pseudo_primary;
1637 sdbg_host->dev.release = &sdebug_release_adapter;
1638 sprintf(sdbg_host->dev.bus_id, "adapter%d", scsi_debug_add_host);
1640 error = device_register(&sdbg_host->dev);
1645 ++scsi_debug_add_host;
1649 list_for_each_safe(lh, lh_sf, &sdbg_host->dev_info_list) {
1650 sdbg_devinfo = list_entry(lh, struct sdebug_dev_info,
1652 list_del(&sdbg_devinfo->dev_list);
1653 kfree(sdbg_devinfo);
1660 static void sdebug_remove_adapter()
1662 struct sdebug_host_info * sdbg_host = NULL;
1664 spin_lock(&sdebug_host_list_lock);
1665 if (!list_empty(&sdebug_host_list)) {
1666 sdbg_host = list_entry(sdebug_host_list.prev,
1667 struct sdebug_host_info, host_list);
1668 list_del(&sdbg_host->host_list);
1670 spin_unlock(&sdebug_host_list_lock);
1675 device_unregister(&sdbg_host->dev);
1676 --scsi_debug_add_host;
1679 static int sdebug_driver_probe(struct device * dev)
1682 struct sdebug_host_info *sdbg_host;
1683 struct Scsi_Host *hpnt;
1685 sdbg_host = to_sdebug_host(dev);
1687 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
1689 printk(KERN_ERR "%s: scsi_register failed\n", __FUNCTION__);
1694 sdbg_host->shost = hpnt;
1695 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
1696 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
1697 hpnt->max_id = scsi_debug_num_tgts + 1;
1699 hpnt->max_id = scsi_debug_num_tgts;
1700 hpnt->max_lun = scsi_debug_max_luns;
1702 error = scsi_add_host(hpnt, &sdbg_host->dev);
1704 printk(KERN_ERR "%s: scsi_add_host failed\n", __FUNCTION__);
1706 scsi_host_put(hpnt);
1708 scsi_scan_host(hpnt);
1714 static int sdebug_driver_remove(struct device * dev)
1716 struct list_head *lh, *lh_sf;
1717 struct sdebug_host_info *sdbg_host;
1718 struct sdebug_dev_info *sdbg_devinfo;
1720 sdbg_host = to_sdebug_host(dev);
1723 printk(KERN_ERR "%s: Unable to locate host info\n",
1728 scsi_remove_host(sdbg_host->shost);
1730 list_for_each_safe(lh, lh_sf, &sdbg_host->dev_info_list) {
1731 sdbg_devinfo = list_entry(lh, struct sdebug_dev_info,
1733 list_del(&sdbg_devinfo->dev_list);
1734 kfree(sdbg_devinfo);
1737 scsi_host_put(sdbg_host->shost);