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1da177e4 LT |
1 | /* |
2 | * linux/kernel/scsi_debug.c | |
3 | * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv | |
4 | * Copyright (C) 1992 Eric Youngdale | |
5 | * Simulate a host adapter with 2 disks attached. Do a lot of checking | |
6 | * to make sure that we are not getting blocks mixed up, and PANIC if | |
7 | * anything out of the ordinary is seen. | |
8 | * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | |
9 | * | |
10 | * This version is more generic, simulating a variable number of disk | |
11 | * (or disk like devices) sharing a common amount of RAM | |
12 | * | |
13 | * | |
14 | * For documentation see http://www.torque.net/sg/sdebug26.html | |
15 | * | |
16 | * D. Gilbert (dpg) work for Magneto-Optical device test [20010421] | |
17 | * dpg: work for devfs large number of disks [20010809] | |
18 | * forked for lk 2.5 series [20011216, 20020101] | |
19 | * use vmalloc() more inquiry+mode_sense [20020302] | |
20 | * add timers for delayed responses [20020721] | |
21 | * Patrick Mansfield <patmans@us.ibm.com> max_luns+scsi_level [20021031] | |
22 | * Mike Anderson <andmike@us.ibm.com> sysfs work [20021118] | |
23 | * dpg: change style of boot options to "scsi_debug.num_tgts=2" and | |
24 | * module options to "modprobe scsi_debug num_tgts=2" [20021221] | |
25 | */ | |
26 | ||
27 | #include <linux/config.h> | |
28 | #include <linux/module.h> | |
29 | ||
30 | #include <linux/kernel.h> | |
31 | #include <linux/sched.h> | |
32 | #include <linux/errno.h> | |
33 | #include <linux/timer.h> | |
34 | #include <linux/types.h> | |
35 | #include <linux/string.h> | |
36 | #include <linux/genhd.h> | |
37 | #include <linux/fs.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/proc_fs.h> | |
40 | #include <linux/smp_lock.h> | |
41 | #include <linux/vmalloc.h> | |
42 | #include <linux/moduleparam.h> | |
43 | ||
44 | #include <linux/blkdev.h> | |
45 | #include "scsi.h" | |
46 | #include <scsi/scsi_host.h> | |
47 | #include <scsi/scsicam.h> | |
48 | ||
49 | #include <linux/stat.h> | |
50 | ||
51 | #ifndef LINUX_VERSION_CODE | |
52 | #include <linux/version.h> | |
53 | #endif | |
54 | ||
55 | #include "scsi_logging.h" | |
56 | #include "scsi_debug.h" | |
57 | ||
58 | #define SCSI_DEBUG_VERSION "1.75" | |
59 | static const char * scsi_debug_version_date = "20050113"; | |
60 | ||
61 | /* Additional Sense Code (ASC) used */ | |
62 | #define NO_ADDED_SENSE 0x0 | |
63 | #define UNRECOVERED_READ_ERR 0x11 | |
64 | #define INVALID_OPCODE 0x20 | |
65 | #define ADDR_OUT_OF_RANGE 0x21 | |
66 | #define INVALID_FIELD_IN_CDB 0x24 | |
67 | #define POWERON_RESET 0x29 | |
68 | #define SAVING_PARAMS_UNSUP 0x39 | |
69 | #define THRESHHOLD_EXCEEDED 0x5d | |
70 | ||
71 | #define SDEBUG_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */ | |
72 | ||
73 | /* Default values for driver parameters */ | |
74 | #define DEF_NUM_HOST 1 | |
75 | #define DEF_NUM_TGTS 1 | |
76 | #define DEF_MAX_LUNS 1 | |
77 | /* With these defaults, this driver will make 1 host with 1 target | |
78 | * (id 0) containing 1 logical unit (lun 0). That is 1 device. | |
79 | */ | |
80 | #define DEF_DELAY 1 | |
81 | #define DEF_DEV_SIZE_MB 8 | |
82 | #define DEF_EVERY_NTH 0 | |
83 | #define DEF_NUM_PARTS 0 | |
84 | #define DEF_OPTS 0 | |
85 | #define DEF_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */ | |
86 | #define DEF_PTYPE 0 | |
87 | #define DEF_D_SENSE 0 | |
88 | ||
89 | /* bit mask values for scsi_debug_opts */ | |
90 | #define SCSI_DEBUG_OPT_NOISE 1 | |
91 | #define SCSI_DEBUG_OPT_MEDIUM_ERR 2 | |
92 | #define SCSI_DEBUG_OPT_TIMEOUT 4 | |
93 | #define SCSI_DEBUG_OPT_RECOVERED_ERR 8 | |
94 | /* When "every_nth" > 0 then modulo "every_nth" commands: | |
95 | * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set | |
96 | * - a RECOVERED_ERROR is simulated on successful read and write | |
97 | * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set. | |
98 | * | |
99 | * When "every_nth" < 0 then after "- every_nth" commands: | |
100 | * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set | |
101 | * - a RECOVERED_ERROR is simulated on successful read and write | |
102 | * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set. | |
103 | * This will continue until some other action occurs (e.g. the user | |
104 | * writing a new value (other than -1 or 1) to every_nth via sysfs). | |
105 | */ | |
106 | ||
107 | /* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this | |
108 | * sector on read commands: */ | |
109 | #define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */ | |
110 | ||
111 | /* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1) | |
112 | * or "peripheral device" addressing (value 0) */ | |
113 | #define SAM2_LUN_ADDRESS_METHOD 0 | |
114 | ||
115 | static int scsi_debug_add_host = DEF_NUM_HOST; | |
116 | static int scsi_debug_delay = DEF_DELAY; | |
117 | static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB; | |
118 | static int scsi_debug_every_nth = DEF_EVERY_NTH; | |
119 | static int scsi_debug_max_luns = DEF_MAX_LUNS; | |
120 | static int scsi_debug_num_parts = DEF_NUM_PARTS; | |
121 | static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */ | |
122 | static int scsi_debug_opts = DEF_OPTS; | |
123 | static int scsi_debug_scsi_level = DEF_SCSI_LEVEL; | |
124 | static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */ | |
125 | static int scsi_debug_dsense = DEF_D_SENSE; | |
126 | ||
127 | static int scsi_debug_cmnd_count = 0; | |
128 | ||
129 | #define DEV_READONLY(TGT) (0) | |
130 | #define DEV_REMOVEABLE(TGT) (0) | |
131 | ||
132 | static unsigned long sdebug_store_size; /* in bytes */ | |
133 | static sector_t sdebug_capacity; /* in sectors */ | |
134 | ||
135 | /* old BIOS stuff, kernel may get rid of them but some mode sense pages | |
136 | may still need them */ | |
137 | static int sdebug_heads; /* heads per disk */ | |
138 | static int sdebug_cylinders_per; /* cylinders per surface */ | |
139 | static int sdebug_sectors_per; /* sectors per cylinder */ | |
140 | ||
141 | /* default sector size is 512 bytes, 2**9 bytes */ | |
142 | #define POW2_SECT_SIZE 9 | |
143 | #define SECT_SIZE (1 << POW2_SECT_SIZE) | |
144 | #define SECT_SIZE_PER(TGT) SECT_SIZE | |
145 | ||
146 | #define SDEBUG_MAX_PARTS 4 | |
147 | ||
148 | #define SDEBUG_SENSE_LEN 32 | |
149 | ||
150 | struct sdebug_dev_info { | |
151 | struct list_head dev_list; | |
152 | unsigned char sense_buff[SDEBUG_SENSE_LEN]; /* weak nexus */ | |
153 | unsigned int channel; | |
154 | unsigned int target; | |
155 | unsigned int lun; | |
156 | struct sdebug_host_info *sdbg_host; | |
157 | char reset; | |
158 | char used; | |
159 | }; | |
160 | ||
161 | struct sdebug_host_info { | |
162 | struct list_head host_list; | |
163 | struct Scsi_Host *shost; | |
164 | struct device dev; | |
165 | struct list_head dev_info_list; | |
166 | }; | |
167 | ||
168 | #define to_sdebug_host(d) \ | |
169 | container_of(d, struct sdebug_host_info, dev) | |
170 | ||
171 | static LIST_HEAD(sdebug_host_list); | |
172 | static DEFINE_SPINLOCK(sdebug_host_list_lock); | |
173 | ||
174 | typedef void (* done_funct_t) (struct scsi_cmnd *); | |
175 | ||
176 | struct sdebug_queued_cmd { | |
177 | int in_use; | |
178 | struct timer_list cmnd_timer; | |
179 | done_funct_t done_funct; | |
180 | struct scsi_cmnd * a_cmnd; | |
181 | int scsi_result; | |
182 | }; | |
183 | static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE]; | |
184 | ||
185 | static Scsi_Host_Template sdebug_driver_template = { | |
186 | .proc_info = scsi_debug_proc_info, | |
187 | .name = "SCSI DEBUG", | |
188 | .info = scsi_debug_info, | |
189 | .slave_alloc = scsi_debug_slave_alloc, | |
190 | .slave_configure = scsi_debug_slave_configure, | |
191 | .slave_destroy = scsi_debug_slave_destroy, | |
192 | .ioctl = scsi_debug_ioctl, | |
193 | .queuecommand = scsi_debug_queuecommand, | |
194 | .eh_abort_handler = scsi_debug_abort, | |
195 | .eh_bus_reset_handler = scsi_debug_bus_reset, | |
196 | .eh_device_reset_handler = scsi_debug_device_reset, | |
197 | .eh_host_reset_handler = scsi_debug_host_reset, | |
198 | .bios_param = scsi_debug_biosparam, | |
199 | .can_queue = SCSI_DEBUG_CANQUEUE, | |
200 | .this_id = 7, | |
201 | .sg_tablesize = 64, | |
202 | .cmd_per_lun = 3, | |
203 | .max_sectors = 4096, | |
204 | .unchecked_isa_dma = 0, | |
205 | .use_clustering = DISABLE_CLUSTERING, | |
206 | .module = THIS_MODULE, | |
207 | }; | |
208 | ||
209 | static unsigned char * fake_storep; /* ramdisk storage */ | |
210 | ||
211 | static int num_aborts = 0; | |
212 | static int num_dev_resets = 0; | |
213 | static int num_bus_resets = 0; | |
214 | static int num_host_resets = 0; | |
215 | ||
216 | static DEFINE_SPINLOCK(queued_arr_lock); | |
217 | static DEFINE_RWLOCK(atomic_rw); | |
218 | ||
219 | static char sdebug_proc_name[] = "scsi_debug"; | |
220 | ||
221 | static int sdebug_driver_probe(struct device *); | |
222 | static int sdebug_driver_remove(struct device *); | |
223 | static struct bus_type pseudo_lld_bus; | |
224 | ||
225 | static struct device_driver sdebug_driverfs_driver = { | |
226 | .name = sdebug_proc_name, | |
227 | .bus = &pseudo_lld_bus, | |
228 | .probe = sdebug_driver_probe, | |
229 | .remove = sdebug_driver_remove, | |
230 | }; | |
231 | ||
232 | static const int check_condition_result = | |
233 | (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; | |
234 | ||
235 | /* function declarations */ | |
236 | static int resp_inquiry(struct scsi_cmnd * SCpnt, int target, | |
237 | struct sdebug_dev_info * devip); | |
238 | static int resp_requests(struct scsi_cmnd * SCpnt, | |
239 | struct sdebug_dev_info * devip); | |
240 | static int resp_readcap(struct scsi_cmnd * SCpnt, | |
241 | struct sdebug_dev_info * devip); | |
242 | static int resp_mode_sense(struct scsi_cmnd * SCpnt, int target, | |
243 | struct sdebug_dev_info * devip); | |
244 | static int resp_read(struct scsi_cmnd * SCpnt, int upper_blk, int block, | |
245 | int num, struct sdebug_dev_info * devip); | |
246 | static int resp_write(struct scsi_cmnd * SCpnt, int upper_blk, int block, | |
247 | int num, struct sdebug_dev_info * devip); | |
248 | static int resp_report_luns(struct scsi_cmnd * SCpnt, | |
249 | struct sdebug_dev_info * devip); | |
250 | static int fill_from_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr, | |
251 | int arr_len); | |
252 | static int fetch_to_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr, | |
253 | int max_arr_len); | |
254 | static void timer_intr_handler(unsigned long); | |
255 | static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev); | |
256 | static void mk_sense_buffer(struct sdebug_dev_info * devip, int key, | |
257 | int asc, int asq); | |
258 | static int check_reset(struct scsi_cmnd * SCpnt, | |
259 | struct sdebug_dev_info * devip); | |
260 | static int schedule_resp(struct scsi_cmnd * cmnd, | |
261 | struct sdebug_dev_info * devip, | |
262 | done_funct_t done, int scsi_result, int delta_jiff); | |
263 | static void __init sdebug_build_parts(unsigned char * ramp); | |
264 | static void __init init_all_queued(void); | |
265 | static void stop_all_queued(void); | |
266 | static int stop_queued_cmnd(struct scsi_cmnd * cmnd); | |
267 | static int inquiry_evpd_83(unsigned char * arr, int dev_id_num, | |
268 | const char * dev_id_str, int dev_id_str_len); | |
269 | static void do_create_driverfs_files(void); | |
270 | static void do_remove_driverfs_files(void); | |
271 | ||
272 | static int sdebug_add_adapter(void); | |
273 | static void sdebug_remove_adapter(void); | |
274 | static void sdebug_max_tgts_luns(void); | |
275 | ||
276 | static struct device pseudo_primary; | |
277 | static struct bus_type pseudo_lld_bus; | |
278 | ||
279 | ||
280 | static | |
281 | int scsi_debug_queuecommand(struct scsi_cmnd * SCpnt, done_funct_t done) | |
282 | { | |
283 | unsigned char *cmd = (unsigned char *) SCpnt->cmnd; | |
284 | int block, upper_blk, num, k; | |
285 | int errsts = 0; | |
286 | int target = SCpnt->device->id; | |
287 | struct sdebug_dev_info * devip = NULL; | |
288 | int inj_recovered = 0; | |
289 | ||
290 | if (done == NULL) | |
291 | return 0; /* assume mid level reprocessing command */ | |
292 | ||
293 | if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) { | |
294 | printk(KERN_INFO "scsi_debug: cmd "); | |
295 | for (k = 0, num = SCpnt->cmd_len; k < num; ++k) | |
296 | printk("%02x ", (int)cmd[k]); | |
297 | printk("\n"); | |
298 | } | |
299 | if(target == sdebug_driver_template.this_id) { | |
300 | printk(KERN_INFO "scsi_debug: initiator's id used as " | |
301 | "target!\n"); | |
302 | return schedule_resp(SCpnt, NULL, done, | |
303 | DID_NO_CONNECT << 16, 0); | |
304 | } | |
305 | ||
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); | |
310 | if (NULL == devip) | |
311 | return schedule_resp(SCpnt, NULL, done, | |
312 | DID_NO_CONNECT << 16, 0); | |
313 | ||
314 | if ((scsi_debug_every_nth != 0) && | |
315 | (++scsi_debug_cmnd_count >= abs(scsi_debug_every_nth))) { | |
316 | scsi_debug_cmnd_count = 0; | |
317 | if (scsi_debug_every_nth < -1) | |
318 | scsi_debug_every_nth = -1; | |
319 | if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts) | |
320 | return 0; /* ignore command causing timeout */ | |
321 | else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts) | |
322 | inj_recovered = 1; /* to reads and writes below */ | |
323 | } | |
324 | ||
325 | switch (*cmd) { | |
326 | case INQUIRY: /* mandatory, ignore unit attention */ | |
327 | errsts = resp_inquiry(SCpnt, target, devip); | |
328 | break; | |
329 | case REQUEST_SENSE: /* mandatory, ignore unit attention */ | |
330 | errsts = resp_requests(SCpnt, devip); | |
331 | break; | |
332 | case REZERO_UNIT: /* actually this is REWIND for SSC */ | |
333 | case START_STOP: | |
334 | errsts = check_reset(SCpnt, devip); | |
335 | break; | |
336 | case ALLOW_MEDIUM_REMOVAL: | |
337 | if ((errsts = check_reset(SCpnt, devip))) | |
338 | break; | |
339 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) | |
340 | printk(KERN_INFO "scsi_debug: Medium removal %s\n", | |
341 | cmd[4] ? "inhibited" : "enabled"); | |
342 | break; | |
343 | case SEND_DIAGNOSTIC: /* mandatory */ | |
344 | errsts = check_reset(SCpnt, devip); | |
345 | break; | |
346 | case TEST_UNIT_READY: /* mandatory */ | |
347 | errsts = check_reset(SCpnt, devip); | |
348 | break; | |
349 | case RESERVE: | |
350 | errsts = check_reset(SCpnt, devip); | |
351 | break; | |
352 | case RESERVE_10: | |
353 | errsts = check_reset(SCpnt, devip); | |
354 | break; | |
355 | case RELEASE: | |
356 | errsts = check_reset(SCpnt, devip); | |
357 | break; | |
358 | case RELEASE_10: | |
359 | errsts = check_reset(SCpnt, devip); | |
360 | break; | |
361 | case READ_CAPACITY: | |
362 | errsts = resp_readcap(SCpnt, devip); | |
363 | break; | |
364 | case READ_16: | |
365 | case READ_12: | |
366 | case READ_10: | |
367 | case READ_6: | |
368 | if ((errsts = check_reset(SCpnt, devip))) | |
369 | break; | |
370 | upper_blk = 0; | |
371 | if ((*cmd) == READ_16) { | |
372 | upper_blk = cmd[5] + (cmd[4] << 8) + | |
373 | (cmd[3] << 16) + (cmd[2] << 24); | |
374 | block = cmd[9] + (cmd[8] << 8) + | |
375 | (cmd[7] << 16) + (cmd[6] << 24); | |
376 | num = cmd[13] + (cmd[12] << 8) + | |
377 | (cmd[11] << 16) + (cmd[10] << 24); | |
378 | } else if ((*cmd) == READ_12) { | |
379 | block = cmd[5] + (cmd[4] << 8) + | |
380 | (cmd[3] << 16) + (cmd[2] << 24); | |
381 | num = cmd[9] + (cmd[8] << 8) + | |
382 | (cmd[7] << 16) + (cmd[6] << 24); | |
383 | } else if ((*cmd) == READ_10) { | |
384 | block = cmd[5] + (cmd[4] << 8) + | |
385 | (cmd[3] << 16) + (cmd[2] << 24); | |
386 | num = cmd[8] + (cmd[7] << 8); | |
387 | } else { | |
388 | block = cmd[3] + (cmd[2] << 8) + | |
389 | ((cmd[1] & 0x1f) << 16); | |
390 | num = cmd[4]; | |
391 | } | |
392 | errsts = resp_read(SCpnt, upper_blk, block, num, devip); | |
393 | if (inj_recovered && (0 == errsts)) { | |
394 | mk_sense_buffer(devip, RECOVERED_ERROR, | |
395 | THRESHHOLD_EXCEEDED, 0); | |
396 | errsts = check_condition_result; | |
397 | } | |
398 | break; | |
399 | case REPORT_LUNS: /* mandatory, ignore unit attention */ | |
400 | errsts = resp_report_luns(SCpnt, devip); | |
401 | break; | |
402 | case VERIFY: /* 10 byte SBC-2 command */ | |
403 | errsts = check_reset(SCpnt, devip); | |
404 | break; | |
405 | case WRITE_16: | |
406 | case WRITE_12: | |
407 | case WRITE_10: | |
408 | case WRITE_6: | |
409 | if ((errsts = check_reset(SCpnt, devip))) | |
410 | break; | |
411 | upper_blk = 0; | |
412 | if ((*cmd) == WRITE_16) { | |
413 | upper_blk = cmd[5] + (cmd[4] << 8) + | |
414 | (cmd[3] << 16) + (cmd[2] << 24); | |
415 | block = cmd[9] + (cmd[8] << 8) + | |
416 | (cmd[7] << 16) + (cmd[6] << 24); | |
417 | num = cmd[13] + (cmd[12] << 8) + | |
418 | (cmd[11] << 16) + (cmd[10] << 24); | |
419 | } else if ((*cmd) == WRITE_12) { | |
420 | block = cmd[5] + (cmd[4] << 8) + | |
421 | (cmd[3] << 16) + (cmd[2] << 24); | |
422 | num = cmd[9] + (cmd[8] << 8) + | |
423 | (cmd[7] << 16) + (cmd[6] << 24); | |
424 | } else if ((*cmd) == WRITE_10) { | |
425 | block = cmd[5] + (cmd[4] << 8) + | |
426 | (cmd[3] << 16) + (cmd[2] << 24); | |
427 | num = cmd[8] + (cmd[7] << 8); | |
428 | } else { | |
429 | block = cmd[3] + (cmd[2] << 8) + | |
430 | ((cmd[1] & 0x1f) << 16); | |
431 | num = cmd[4]; | |
432 | } | |
433 | errsts = resp_write(SCpnt, upper_blk, block, num, devip); | |
434 | if (inj_recovered && (0 == errsts)) { | |
435 | mk_sense_buffer(devip, RECOVERED_ERROR, | |
436 | THRESHHOLD_EXCEEDED, 0); | |
437 | errsts = check_condition_result; | |
438 | } | |
439 | break; | |
440 | case MODE_SENSE: | |
441 | case MODE_SENSE_10: | |
442 | errsts = resp_mode_sense(SCpnt, target, devip); | |
443 | break; | |
444 | case SYNCHRONIZE_CACHE: | |
445 | errsts = check_reset(SCpnt, devip); | |
446 | break; | |
447 | default: | |
448 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) | |
449 | printk(KERN_INFO "scsi_debug: Opcode: 0x%x not " | |
450 | "supported\n", *cmd); | |
451 | if ((errsts = check_reset(SCpnt, devip))) | |
452 | break; /* Unit attention takes precedence */ | |
453 | mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0); | |
454 | errsts = check_condition_result; | |
455 | break; | |
456 | } | |
457 | return schedule_resp(SCpnt, devip, done, errsts, scsi_debug_delay); | |
458 | } | |
459 | ||
460 | static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg) | |
461 | { | |
462 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) { | |
463 | printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd); | |
464 | } | |
465 | return -EINVAL; | |
466 | /* return -ENOTTY; // correct return but upsets fdisk */ | |
467 | } | |
468 | ||
469 | static int check_reset(struct scsi_cmnd * SCpnt, struct sdebug_dev_info * devip) | |
470 | { | |
471 | if (devip->reset) { | |
472 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) | |
473 | printk(KERN_INFO "scsi_debug: Reporting Unit " | |
474 | "attention: power on reset\n"); | |
475 | devip->reset = 0; | |
476 | mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0); | |
477 | return check_condition_result; | |
478 | } | |
479 | return 0; | |
480 | } | |
481 | ||
482 | /* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */ | |
483 | static int fill_from_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr, | |
484 | int arr_len) | |
485 | { | |
486 | int k, req_len, act_len, len, active; | |
487 | void * kaddr; | |
488 | void * kaddr_off; | |
489 | struct scatterlist * sgpnt; | |
490 | ||
491 | if (0 == scp->request_bufflen) | |
492 | return 0; | |
493 | if (NULL == scp->request_buffer) | |
494 | return (DID_ERROR << 16); | |
495 | if (! ((scp->sc_data_direction == DMA_BIDIRECTIONAL) || | |
496 | (scp->sc_data_direction == DMA_FROM_DEVICE))) | |
497 | return (DID_ERROR << 16); | |
498 | if (0 == scp->use_sg) { | |
499 | req_len = scp->request_bufflen; | |
500 | act_len = (req_len < arr_len) ? req_len : arr_len; | |
501 | memcpy(scp->request_buffer, arr, act_len); | |
502 | scp->resid = req_len - act_len; | |
503 | return 0; | |
504 | } | |
505 | sgpnt = (struct scatterlist *)scp->request_buffer; | |
506 | active = 1; | |
507 | for (k = 0, req_len = 0, act_len = 0; k < scp->use_sg; ++k, ++sgpnt) { | |
508 | if (active) { | |
509 | kaddr = (unsigned char *) | |
510 | kmap_atomic(sgpnt->page, KM_USER0); | |
511 | if (NULL == kaddr) | |
512 | return (DID_ERROR << 16); | |
513 | kaddr_off = (unsigned char *)kaddr + sgpnt->offset; | |
514 | len = sgpnt->length; | |
515 | if ((req_len + len) > arr_len) { | |
516 | active = 0; | |
517 | len = arr_len - req_len; | |
518 | } | |
519 | memcpy(kaddr_off, arr + req_len, len); | |
520 | kunmap_atomic(kaddr, KM_USER0); | |
521 | act_len += len; | |
522 | } | |
523 | req_len += sgpnt->length; | |
524 | } | |
525 | scp->resid = req_len - act_len; | |
526 | return 0; | |
527 | } | |
528 | ||
529 | /* Returns number of bytes fetched into 'arr' or -1 if error. */ | |
530 | static int fetch_to_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr, | |
531 | int max_arr_len) | |
532 | { | |
533 | int k, req_len, len, fin; | |
534 | void * kaddr; | |
535 | void * kaddr_off; | |
536 | struct scatterlist * sgpnt; | |
537 | ||
538 | if (0 == scp->request_bufflen) | |
539 | return 0; | |
540 | if (NULL == scp->request_buffer) | |
541 | return -1; | |
542 | if (! ((scp->sc_data_direction == DMA_BIDIRECTIONAL) || | |
543 | (scp->sc_data_direction == DMA_TO_DEVICE))) | |
544 | return -1; | |
545 | if (0 == scp->use_sg) { | |
546 | req_len = scp->request_bufflen; | |
547 | len = (req_len < max_arr_len) ? req_len : max_arr_len; | |
548 | memcpy(arr, scp->request_buffer, len); | |
549 | return len; | |
550 | } | |
551 | sgpnt = (struct scatterlist *)scp->request_buffer; | |
552 | for (k = 0, req_len = 0, fin = 0; k < scp->use_sg; ++k, ++sgpnt) { | |
553 | kaddr = (unsigned char *)kmap_atomic(sgpnt->page, KM_USER0); | |
554 | if (NULL == kaddr) | |
555 | return -1; | |
556 | kaddr_off = (unsigned char *)kaddr + sgpnt->offset; | |
557 | len = sgpnt->length; | |
558 | if ((req_len + len) > max_arr_len) { | |
559 | len = max_arr_len - req_len; | |
560 | fin = 1; | |
561 | } | |
562 | memcpy(arr + req_len, kaddr_off, len); | |
563 | kunmap_atomic(kaddr, KM_USER0); | |
564 | if (fin) | |
565 | return req_len + len; | |
566 | req_len += sgpnt->length; | |
567 | } | |
568 | return req_len; | |
569 | } | |
570 | ||
571 | ||
572 | static const char * inq_vendor_id = "Linux "; | |
573 | static const char * inq_product_id = "scsi_debug "; | |
574 | static const char * inq_product_rev = "0004"; | |
575 | ||
576 | static int inquiry_evpd_83(unsigned char * arr, int dev_id_num, | |
577 | const char * dev_id_str, int dev_id_str_len) | |
578 | { | |
579 | int num; | |
580 | ||
581 | /* Two identification descriptors: */ | |
582 | /* T10 vendor identifier field format (faked) */ | |
583 | arr[0] = 0x2; /* ASCII */ | |
584 | arr[1] = 0x1; | |
585 | arr[2] = 0x0; | |
586 | memcpy(&arr[4], inq_vendor_id, 8); | |
587 | memcpy(&arr[12], inq_product_id, 16); | |
588 | memcpy(&arr[28], dev_id_str, dev_id_str_len); | |
589 | num = 8 + 16 + dev_id_str_len; | |
590 | arr[3] = num; | |
591 | num += 4; | |
592 | /* NAA IEEE registered identifier (faked) */ | |
593 | arr[num] = 0x1; /* binary */ | |
594 | arr[num + 1] = 0x3; | |
595 | arr[num + 2] = 0x0; | |
596 | arr[num + 3] = 0x8; | |
597 | arr[num + 4] = 0x51; /* ieee company id=0x123456 (faked) */ | |
598 | arr[num + 5] = 0x23; | |
599 | arr[num + 6] = 0x45; | |
600 | arr[num + 7] = 0x60; | |
601 | arr[num + 8] = (dev_id_num >> 24); | |
602 | arr[num + 9] = (dev_id_num >> 16) & 0xff; | |
603 | arr[num + 10] = (dev_id_num >> 8) & 0xff; | |
604 | arr[num + 11] = dev_id_num & 0xff; | |
605 | return num + 12; | |
606 | } | |
607 | ||
608 | ||
609 | #define SDEBUG_LONG_INQ_SZ 96 | |
610 | #define SDEBUG_MAX_INQ_ARR_SZ 128 | |
611 | ||
612 | static int resp_inquiry(struct scsi_cmnd * scp, int target, | |
613 | struct sdebug_dev_info * devip) | |
614 | { | |
615 | unsigned char pq_pdt; | |
616 | unsigned char arr[SDEBUG_MAX_INQ_ARR_SZ]; | |
617 | unsigned char *cmd = (unsigned char *)scp->cmnd; | |
618 | int alloc_len; | |
619 | ||
620 | alloc_len = (cmd[3] << 8) + cmd[4]; | |
621 | memset(arr, 0, SDEBUG_MAX_INQ_ARR_SZ); | |
622 | pq_pdt = (scsi_debug_ptype & 0x1f); | |
623 | arr[0] = pq_pdt; | |
624 | if (0x2 & cmd[1]) { /* CMDDT bit set */ | |
625 | mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, | |
626 | 0); | |
627 | return check_condition_result; | |
628 | } else if (0x1 & cmd[1]) { /* EVPD bit set */ | |
629 | int dev_id_num, len; | |
630 | char dev_id_str[6]; | |
631 | ||
632 | dev_id_num = ((devip->sdbg_host->shost->host_no + 1) * 2000) + | |
633 | (devip->target * 1000) + devip->lun; | |
634 | len = scnprintf(dev_id_str, 6, "%d", dev_id_num); | |
635 | if (0 == cmd[2]) { /* supported vital product data pages */ | |
636 | arr[3] = 3; | |
637 | arr[4] = 0x0; /* this page */ | |
638 | arr[5] = 0x80; /* unit serial number */ | |
639 | arr[6] = 0x83; /* device identification */ | |
640 | } else if (0x80 == cmd[2]) { /* unit serial number */ | |
641 | arr[1] = 0x80; | |
642 | arr[3] = len; | |
643 | memcpy(&arr[4], dev_id_str, len); | |
644 | } else if (0x83 == cmd[2]) { /* device identification */ | |
645 | arr[1] = 0x83; | |
646 | arr[3] = inquiry_evpd_83(&arr[4], dev_id_num, | |
647 | dev_id_str, len); | |
648 | } else { | |
649 | /* Illegal request, invalid field in cdb */ | |
650 | mk_sense_buffer(devip, ILLEGAL_REQUEST, | |
651 | INVALID_FIELD_IN_CDB, 0); | |
652 | return check_condition_result; | |
653 | } | |
654 | return fill_from_dev_buffer(scp, arr, | |
655 | min(alloc_len, SDEBUG_MAX_INQ_ARR_SZ)); | |
656 | } | |
657 | /* drops through here for a standard inquiry */ | |
658 | arr[1] = DEV_REMOVEABLE(target) ? 0x80 : 0; /* Removable disk */ | |
659 | arr[2] = scsi_debug_scsi_level; | |
660 | arr[3] = 2; /* response_data_format==2 */ | |
661 | arr[4] = SDEBUG_LONG_INQ_SZ - 5; | |
662 | arr[6] = 0x1; /* claim: ADDR16 */ | |
663 | /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */ | |
664 | arr[7] = 0x3a; /* claim: WBUS16, SYNC, LINKED + CMDQUE */ | |
665 | memcpy(&arr[8], inq_vendor_id, 8); | |
666 | memcpy(&arr[16], inq_product_id, 16); | |
667 | memcpy(&arr[32], inq_product_rev, 4); | |
668 | /* version descriptors (2 bytes each) follow */ | |
669 | arr[58] = 0x0; arr[59] = 0x40; /* SAM-2 */ | |
670 | arr[60] = 0x3; arr[61] = 0x0; /* SPC-3 */ | |
671 | if (scsi_debug_ptype == 0) { | |
672 | arr[62] = 0x1; arr[63] = 0x80; /* SBC */ | |
673 | } else if (scsi_debug_ptype == 1) { | |
674 | arr[62] = 0x2; arr[63] = 0x00; /* SSC */ | |
675 | } | |
676 | return fill_from_dev_buffer(scp, arr, | |
677 | min(alloc_len, SDEBUG_LONG_INQ_SZ)); | |
678 | } | |
679 | ||
680 | static int resp_requests(struct scsi_cmnd * scp, | |
681 | struct sdebug_dev_info * devip) | |
682 | { | |
683 | unsigned char * sbuff; | |
684 | unsigned char *cmd = (unsigned char *)scp->cmnd; | |
685 | unsigned char arr[SDEBUG_SENSE_LEN]; | |
686 | int len = 18; | |
687 | ||
688 | memset(arr, 0, SDEBUG_SENSE_LEN); | |
689 | if (devip->reset == 1) | |
690 | mk_sense_buffer(devip, 0, NO_ADDED_SENSE, 0); | |
691 | sbuff = devip->sense_buff; | |
692 | if ((cmd[1] & 1) && (! scsi_debug_dsense)) { | |
693 | /* DESC bit set and sense_buff in fixed format */ | |
694 | arr[0] = 0x72; | |
695 | arr[1] = sbuff[2]; /* sense key */ | |
696 | arr[2] = sbuff[12]; /* asc */ | |
697 | arr[3] = sbuff[13]; /* ascq */ | |
698 | len = 8; | |
699 | } else | |
700 | memcpy(arr, sbuff, SDEBUG_SENSE_LEN); | |
701 | mk_sense_buffer(devip, 0, NO_ADDED_SENSE, 0); | |
702 | return fill_from_dev_buffer(scp, arr, len); | |
703 | } | |
704 | ||
705 | #define SDEBUG_READCAP_ARR_SZ 8 | |
706 | static int resp_readcap(struct scsi_cmnd * scp, | |
707 | struct sdebug_dev_info * devip) | |
708 | { | |
709 | unsigned char arr[SDEBUG_READCAP_ARR_SZ]; | |
710 | unsigned long capac; | |
711 | int errsts; | |
712 | ||
713 | if ((errsts = check_reset(scp, devip))) | |
714 | return errsts; | |
715 | memset(arr, 0, SDEBUG_READCAP_ARR_SZ); | |
716 | capac = (unsigned long)sdebug_capacity - 1; | |
717 | arr[0] = (capac >> 24); | |
718 | arr[1] = (capac >> 16) & 0xff; | |
719 | arr[2] = (capac >> 8) & 0xff; | |
720 | arr[3] = capac & 0xff; | |
721 | arr[6] = (SECT_SIZE_PER(target) >> 8) & 0xff; | |
722 | arr[7] = SECT_SIZE_PER(target) & 0xff; | |
723 | return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ); | |
724 | } | |
725 | ||
726 | /* <<Following mode page info copied from ST318451LW>> */ | |
727 | ||
728 | static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target) | |
729 | { /* Read-Write Error Recovery page for mode_sense */ | |
730 | unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0, | |
731 | 5, 0, 0xff, 0xff}; | |
732 | ||
733 | memcpy(p, err_recov_pg, sizeof(err_recov_pg)); | |
734 | if (1 == pcontrol) | |
735 | memset(p + 2, 0, sizeof(err_recov_pg) - 2); | |
736 | return sizeof(err_recov_pg); | |
737 | } | |
738 | ||
739 | static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target) | |
740 | { /* Disconnect-Reconnect page for mode_sense */ | |
741 | unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0, | |
742 | 0, 0, 0, 0, 0, 0, 0, 0}; | |
743 | ||
744 | memcpy(p, disconnect_pg, sizeof(disconnect_pg)); | |
745 | if (1 == pcontrol) | |
746 | memset(p + 2, 0, sizeof(disconnect_pg) - 2); | |
747 | return sizeof(disconnect_pg); | |
748 | } | |
749 | ||
750 | static int resp_format_pg(unsigned char * p, int pcontrol, int target) | |
751 | { /* Format device page for mode_sense */ | |
752 | unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0, | |
753 | 0, 0, 0, 0, 0, 0, 0, 0, | |
754 | 0, 0, 0, 0, 0x40, 0, 0, 0}; | |
755 | ||
756 | memcpy(p, format_pg, sizeof(format_pg)); | |
757 | p[10] = (sdebug_sectors_per >> 8) & 0xff; | |
758 | p[11] = sdebug_sectors_per & 0xff; | |
759 | p[12] = (SECT_SIZE >> 8) & 0xff; | |
760 | p[13] = SECT_SIZE & 0xff; | |
761 | if (DEV_REMOVEABLE(target)) | |
762 | p[20] |= 0x20; /* should agree with INQUIRY */ | |
763 | if (1 == pcontrol) | |
764 | memset(p + 2, 0, sizeof(format_pg) - 2); | |
765 | return sizeof(format_pg); | |
766 | } | |
767 | ||
768 | static int resp_caching_pg(unsigned char * p, int pcontrol, int target) | |
769 | { /* Caching page for mode_sense */ | |
770 | unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, | |
771 | 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0}; | |
772 | ||
773 | memcpy(p, caching_pg, sizeof(caching_pg)); | |
774 | if (1 == pcontrol) | |
775 | memset(p + 2, 0, sizeof(caching_pg) - 2); | |
776 | return sizeof(caching_pg); | |
777 | } | |
778 | ||
779 | static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target) | |
780 | { /* Control mode page for mode_sense */ | |
781 | unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, | |
782 | 0, 0, 0x2, 0x4b}; | |
783 | ||
784 | if (scsi_debug_dsense) | |
785 | ctrl_m_pg[2] |= 0x4; | |
786 | memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg)); | |
787 | if (1 == pcontrol) | |
788 | memset(p + 2, 0, sizeof(ctrl_m_pg) - 2); | |
789 | return sizeof(ctrl_m_pg); | |
790 | } | |
791 | ||
792 | static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target) | |
793 | { /* Informational Exceptions control mode page for mode_sense */ | |
794 | unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, | |
795 | 0, 0, 0x0, 0x0}; | |
796 | memcpy(p, iec_m_pg, sizeof(iec_m_pg)); | |
797 | if (1 == pcontrol) | |
798 | memset(p + 2, 0, sizeof(iec_m_pg) - 2); | |
799 | return sizeof(iec_m_pg); | |
800 | } | |
801 | ||
802 | #define SDEBUG_MAX_MSENSE_SZ 256 | |
803 | ||
804 | static int resp_mode_sense(struct scsi_cmnd * scp, int target, | |
805 | struct sdebug_dev_info * devip) | |
806 | { | |
807 | unsigned char dbd; | |
808 | int pcontrol, pcode, subpcode; | |
809 | unsigned char dev_spec; | |
810 | int alloc_len, msense_6, offset, len, errsts; | |
811 | unsigned char * ap; | |
812 | unsigned char arr[SDEBUG_MAX_MSENSE_SZ]; | |
813 | unsigned char *cmd = (unsigned char *)scp->cmnd; | |
814 | ||
815 | if ((errsts = check_reset(scp, devip))) | |
816 | return errsts; | |
817 | dbd = cmd[1] & 0x8; | |
818 | pcontrol = (cmd[2] & 0xc0) >> 6; | |
819 | pcode = cmd[2] & 0x3f; | |
820 | subpcode = cmd[3]; | |
821 | msense_6 = (MODE_SENSE == cmd[0]); | |
822 | alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]); | |
823 | memset(arr, 0, SDEBUG_MAX_MSENSE_SZ); | |
824 | if (0x3 == pcontrol) { /* Saving values not supported */ | |
825 | mk_sense_buffer(devip, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, | |
826 | 0); | |
827 | return check_condition_result; | |
828 | } | |
829 | dev_spec = DEV_READONLY(target) ? 0x80 : 0x0; | |
830 | if (msense_6) { | |
831 | arr[2] = dev_spec; | |
832 | offset = 4; | |
833 | } else { | |
834 | arr[3] = dev_spec; | |
835 | offset = 8; | |
836 | } | |
837 | ap = arr + offset; | |
838 | ||
839 | if (0 != subpcode) { /* TODO: Control Extension page */ | |
840 | mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, | |
841 | 0); | |
842 | return check_condition_result; | |
843 | } | |
844 | switch (pcode) { | |
845 | case 0x1: /* Read-Write error recovery page, direct access */ | |
846 | len = resp_err_recov_pg(ap, pcontrol, target); | |
847 | offset += len; | |
848 | break; | |
849 | case 0x2: /* Disconnect-Reconnect page, all devices */ | |
850 | len = resp_disconnect_pg(ap, pcontrol, target); | |
851 | offset += len; | |
852 | break; | |
853 | case 0x3: /* Format device page, direct access */ | |
854 | len = resp_format_pg(ap, pcontrol, target); | |
855 | offset += len; | |
856 | break; | |
857 | case 0x8: /* Caching page, direct access */ | |
858 | len = resp_caching_pg(ap, pcontrol, target); | |
859 | offset += len; | |
860 | break; | |
861 | case 0xa: /* Control Mode page, all devices */ | |
862 | len = resp_ctrl_m_pg(ap, pcontrol, target); | |
863 | offset += len; | |
864 | break; | |
865 | case 0x1c: /* Informational Exceptions Mode page, all devices */ | |
866 | len = resp_iec_m_pg(ap, pcontrol, target); | |
867 | offset += len; | |
868 | break; | |
869 | case 0x3f: /* Read all Mode pages */ | |
870 | len = resp_err_recov_pg(ap, pcontrol, target); | |
871 | len += resp_disconnect_pg(ap + len, pcontrol, target); | |
872 | len += resp_format_pg(ap + len, pcontrol, target); | |
873 | len += resp_caching_pg(ap + len, pcontrol, target); | |
874 | len += resp_ctrl_m_pg(ap + len, pcontrol, target); | |
875 | len += resp_iec_m_pg(ap + len, pcontrol, target); | |
876 | offset += len; | |
877 | break; | |
878 | default: | |
879 | mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, | |
880 | 0); | |
881 | return check_condition_result; | |
882 | } | |
883 | if (msense_6) | |
884 | arr[0] = offset - 1; | |
885 | else { | |
886 | arr[0] = ((offset - 2) >> 8) & 0xff; | |
887 | arr[1] = (offset - 2) & 0xff; | |
888 | } | |
889 | return fill_from_dev_buffer(scp, arr, min(alloc_len, offset)); | |
890 | } | |
891 | ||
892 | static int resp_read(struct scsi_cmnd * SCpnt, int upper_blk, int block, | |
893 | int num, struct sdebug_dev_info * devip) | |
894 | { | |
895 | unsigned long iflags; | |
896 | int ret; | |
897 | ||
898 | if (upper_blk || (block + num > sdebug_capacity)) { | |
899 | mk_sense_buffer(devip, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, | |
900 | 0); | |
901 | return check_condition_result; | |
902 | } | |
903 | if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) && | |
904 | (block <= OPT_MEDIUM_ERR_ADDR) && | |
905 | ((block + num) > OPT_MEDIUM_ERR_ADDR)) { | |
906 | mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR, | |
907 | 0); | |
908 | /* claim unrecoverable read error */ | |
909 | return check_condition_result; | |
910 | } | |
911 | read_lock_irqsave(&atomic_rw, iflags); | |
912 | ret = fill_from_dev_buffer(SCpnt, fake_storep + (block * SECT_SIZE), | |
913 | num * SECT_SIZE); | |
914 | read_unlock_irqrestore(&atomic_rw, iflags); | |
915 | return ret; | |
916 | } | |
917 | ||
918 | static int resp_write(struct scsi_cmnd * SCpnt, int upper_blk, int block, | |
919 | int num, struct sdebug_dev_info * devip) | |
920 | { | |
921 | unsigned long iflags; | |
922 | int res; | |
923 | ||
924 | if (upper_blk || (block + num > sdebug_capacity)) { | |
925 | mk_sense_buffer(devip, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, | |
926 | 0); | |
927 | return check_condition_result; | |
928 | } | |
929 | ||
930 | write_lock_irqsave(&atomic_rw, iflags); | |
931 | res = fetch_to_dev_buffer(SCpnt, fake_storep + (block * SECT_SIZE), | |
932 | num * SECT_SIZE); | |
933 | write_unlock_irqrestore(&atomic_rw, iflags); | |
934 | if (-1 == res) | |
935 | return (DID_ERROR << 16); | |
936 | else if ((res < (num * SECT_SIZE)) && | |
937 | (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) | |
938 | printk(KERN_INFO "scsi_debug: write: cdb indicated=%d, " | |
939 | " IO sent=%d bytes\n", num * SECT_SIZE, res); | |
940 | return 0; | |
941 | } | |
942 | ||
943 | #define SDEBUG_RLUN_ARR_SZ 128 | |
944 | ||
945 | static int resp_report_luns(struct scsi_cmnd * scp, | |
946 | struct sdebug_dev_info * devip) | |
947 | { | |
948 | unsigned int alloc_len; | |
949 | int lun_cnt, i, upper; | |
950 | unsigned char *cmd = (unsigned char *)scp->cmnd; | |
951 | int select_report = (int)cmd[2]; | |
952 | struct scsi_lun *one_lun; | |
953 | unsigned char arr[SDEBUG_RLUN_ARR_SZ]; | |
954 | ||
955 | alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24); | |
956 | if ((alloc_len < 16) || (select_report > 2)) { | |
957 | mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, | |
958 | 0); | |
959 | return check_condition_result; | |
960 | } | |
961 | /* can produce response with up to 16k luns (lun 0 to lun 16383) */ | |
962 | memset(arr, 0, SDEBUG_RLUN_ARR_SZ); | |
963 | lun_cnt = scsi_debug_max_luns; | |
964 | arr[2] = ((sizeof(struct scsi_lun) * lun_cnt) >> 8) & 0xff; | |
965 | arr[3] = (sizeof(struct scsi_lun) * lun_cnt) & 0xff; | |
966 | lun_cnt = min((int)((SDEBUG_RLUN_ARR_SZ - 8) / | |
967 | sizeof(struct scsi_lun)), lun_cnt); | |
968 | one_lun = (struct scsi_lun *) &arr[8]; | |
969 | for (i = 0; i < lun_cnt; i++) { | |
970 | upper = (i >> 8) & 0x3f; | |
971 | if (upper) | |
972 | one_lun[i].scsi_lun[0] = | |
973 | (upper | (SAM2_LUN_ADDRESS_METHOD << 6)); | |
974 | one_lun[i].scsi_lun[1] = i & 0xff; | |
975 | } | |
976 | return fill_from_dev_buffer(scp, arr, | |
977 | min((int)alloc_len, SDEBUG_RLUN_ARR_SZ)); | |
978 | } | |
979 | ||
980 | /* When timer goes off this function is called. */ | |
981 | static void timer_intr_handler(unsigned long indx) | |
982 | { | |
983 | struct sdebug_queued_cmd * sqcp; | |
984 | unsigned long iflags; | |
985 | ||
986 | if (indx >= SCSI_DEBUG_CANQUEUE) { | |
987 | printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too " | |
988 | "large\n"); | |
989 | return; | |
990 | } | |
991 | spin_lock_irqsave(&queued_arr_lock, iflags); | |
992 | sqcp = &queued_arr[(int)indx]; | |
993 | if (! sqcp->in_use) { | |
994 | printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected " | |
995 | "interrupt\n"); | |
996 | spin_unlock_irqrestore(&queued_arr_lock, iflags); | |
997 | return; | |
998 | } | |
999 | sqcp->in_use = 0; | |
1000 | if (sqcp->done_funct) { | |
1001 | sqcp->a_cmnd->result = sqcp->scsi_result; | |
1002 | sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */ | |
1003 | } | |
1004 | sqcp->done_funct = NULL; | |
1005 | spin_unlock_irqrestore(&queued_arr_lock, iflags); | |
1006 | } | |
1007 | ||
1008 | static int scsi_debug_slave_alloc(struct scsi_device * sdp) | |
1009 | { | |
1010 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) | |
1011 | printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %u>\n", | |
1012 | sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); | |
1013 | return 0; | |
1014 | } | |
1015 | ||
1016 | static int scsi_debug_slave_configure(struct scsi_device * sdp) | |
1017 | { | |
1018 | struct sdebug_dev_info * devip; | |
1019 | ||
1020 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) | |
1021 | printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %u>\n", | |
1022 | sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); | |
1023 | if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN) | |
1024 | sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN; | |
1025 | devip = devInfoReg(sdp); | |
1026 | sdp->hostdata = devip; | |
1027 | if (sdp->host->cmd_per_lun) | |
1028 | scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING, | |
1029 | sdp->host->cmd_per_lun); | |
1030 | return 0; | |
1031 | } | |
1032 | ||
1033 | static void scsi_debug_slave_destroy(struct scsi_device * sdp) | |
1034 | { | |
1035 | struct sdebug_dev_info * devip = | |
1036 | (struct sdebug_dev_info *)sdp->hostdata; | |
1037 | ||
1038 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) | |
1039 | printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %u>\n", | |
1040 | sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); | |
1041 | if (devip) { | |
1042 | /* make this slot avaliable for re-use */ | |
1043 | devip->used = 0; | |
1044 | sdp->hostdata = NULL; | |
1045 | } | |
1046 | } | |
1047 | ||
1048 | static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev) | |
1049 | { | |
1050 | struct sdebug_host_info * sdbg_host; | |
1051 | struct sdebug_dev_info * open_devip = NULL; | |
1052 | struct sdebug_dev_info * devip = | |
1053 | (struct sdebug_dev_info *)sdev->hostdata; | |
1054 | ||
1055 | if (devip) | |
1056 | return devip; | |
1057 | sdbg_host = *(struct sdebug_host_info **) sdev->host->hostdata; | |
1058 | if(! sdbg_host) { | |
1059 | printk(KERN_ERR "Host info NULL\n"); | |
1060 | return NULL; | |
1061 | } | |
1062 | list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { | |
1063 | if ((devip->used) && (devip->channel == sdev->channel) && | |
1064 | (devip->target == sdev->id) && | |
1065 | (devip->lun == sdev->lun)) | |
1066 | return devip; | |
1067 | else { | |
1068 | if ((!devip->used) && (!open_devip)) | |
1069 | open_devip = devip; | |
1070 | } | |
1071 | } | |
1072 | if (NULL == open_devip) { /* try and make a new one */ | |
1073 | open_devip = kmalloc(sizeof(*open_devip),GFP_KERNEL); | |
1074 | if (NULL == open_devip) { | |
1075 | printk(KERN_ERR "%s: out of memory at line %d\n", | |
1076 | __FUNCTION__, __LINE__); | |
1077 | return NULL; | |
1078 | } | |
1079 | memset(open_devip, 0, sizeof(*open_devip)); | |
1080 | open_devip->sdbg_host = sdbg_host; | |
1081 | list_add_tail(&open_devip->dev_list, | |
1082 | &sdbg_host->dev_info_list); | |
1083 | } | |
1084 | if (open_devip) { | |
1085 | open_devip->channel = sdev->channel; | |
1086 | open_devip->target = sdev->id; | |
1087 | open_devip->lun = sdev->lun; | |
1088 | open_devip->sdbg_host = sdbg_host; | |
1089 | open_devip->reset = 1; | |
1090 | open_devip->used = 1; | |
1091 | memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN); | |
1092 | if (scsi_debug_dsense) | |
1093 | open_devip->sense_buff[0] = 0x72; | |
1094 | else { | |
1095 | open_devip->sense_buff[0] = 0x70; | |
1096 | open_devip->sense_buff[7] = 0xa; | |
1097 | } | |
1098 | return open_devip; | |
1099 | } | |
1100 | return NULL; | |
1101 | } | |
1102 | ||
1103 | static void mk_sense_buffer(struct sdebug_dev_info * devip, int key, | |
1104 | int asc, int asq) | |
1105 | { | |
1106 | unsigned char * sbuff; | |
1107 | ||
1108 | sbuff = devip->sense_buff; | |
1109 | memset(sbuff, 0, SDEBUG_SENSE_LEN); | |
1110 | if (scsi_debug_dsense) { | |
1111 | sbuff[0] = 0x72; /* descriptor, current */ | |
1112 | sbuff[1] = key; | |
1113 | sbuff[2] = asc; | |
1114 | sbuff[3] = asq; | |
1115 | } else { | |
1116 | sbuff[0] = 0x70; /* fixed, current */ | |
1117 | sbuff[2] = key; | |
1118 | sbuff[7] = 0xa; /* implies 18 byte sense buffer */ | |
1119 | sbuff[12] = asc; | |
1120 | sbuff[13] = asq; | |
1121 | } | |
1122 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) | |
1123 | printk(KERN_INFO "scsi_debug: [sense_key,asc,ascq]: " | |
1124 | "[0x%x,0x%x,0x%x]\n", key, asc, asq); | |
1125 | } | |
1126 | ||
1127 | static int scsi_debug_abort(struct scsi_cmnd * SCpnt) | |
1128 | { | |
1129 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) | |
1130 | printk(KERN_INFO "scsi_debug: abort\n"); | |
1131 | ++num_aborts; | |
1132 | stop_queued_cmnd(SCpnt); | |
1133 | return SUCCESS; | |
1134 | } | |
1135 | ||
1136 | static int scsi_debug_biosparam(struct scsi_device *sdev, | |
1137 | struct block_device * bdev, sector_t capacity, int *info) | |
1138 | { | |
1139 | int res; | |
1140 | unsigned char *buf; | |
1141 | ||
1142 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) | |
1143 | printk(KERN_INFO "scsi_debug: biosparam\n"); | |
1144 | buf = scsi_bios_ptable(bdev); | |
1145 | if (buf) { | |
1146 | res = scsi_partsize(buf, capacity, | |
1147 | &info[2], &info[0], &info[1]); | |
1148 | kfree(buf); | |
1149 | if (! res) | |
1150 | return res; | |
1151 | } | |
1152 | info[0] = sdebug_heads; | |
1153 | info[1] = sdebug_sectors_per; | |
1154 | info[2] = sdebug_cylinders_per; | |
1155 | return 0; | |
1156 | } | |
1157 | ||
1158 | static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt) | |
1159 | { | |
1160 | struct sdebug_dev_info * devip; | |
1161 | ||
1162 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) | |
1163 | printk(KERN_INFO "scsi_debug: device_reset\n"); | |
1164 | ++num_dev_resets; | |
1165 | if (SCpnt) { | |
1166 | devip = devInfoReg(SCpnt->device); | |
1167 | if (devip) | |
1168 | devip->reset = 1; | |
1169 | } | |
1170 | return SUCCESS; | |
1171 | } | |
1172 | ||
1173 | static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt) | |
1174 | { | |
1175 | struct sdebug_host_info *sdbg_host; | |
1176 | struct sdebug_dev_info * dev_info; | |
1177 | struct scsi_device * sdp; | |
1178 | struct Scsi_Host * hp; | |
1179 | ||
1180 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) | |
1181 | printk(KERN_INFO "scsi_debug: bus_reset\n"); | |
1182 | ++num_bus_resets; | |
1183 | if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) { | |
1184 | sdbg_host = *(struct sdebug_host_info **) hp->hostdata; | |
1185 | if (sdbg_host) { | |
1186 | list_for_each_entry(dev_info, | |
1187 | &sdbg_host->dev_info_list, | |
1188 | dev_list) | |
1189 | dev_info->reset = 1; | |
1190 | } | |
1191 | } | |
1192 | return SUCCESS; | |
1193 | } | |
1194 | ||
1195 | static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt) | |
1196 | { | |
1197 | struct sdebug_host_info * sdbg_host; | |
1198 | struct sdebug_dev_info * dev_info; | |
1199 | ||
1200 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) | |
1201 | printk(KERN_INFO "scsi_debug: host_reset\n"); | |
1202 | ++num_host_resets; | |
1203 | spin_lock(&sdebug_host_list_lock); | |
1204 | list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { | |
1205 | list_for_each_entry(dev_info, &sdbg_host->dev_info_list, | |
1206 | dev_list) | |
1207 | dev_info->reset = 1; | |
1208 | } | |
1209 | spin_unlock(&sdebug_host_list_lock); | |
1210 | stop_all_queued(); | |
1211 | return SUCCESS; | |
1212 | } | |
1213 | ||
1214 | /* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */ | |
1215 | static int stop_queued_cmnd(struct scsi_cmnd * cmnd) | |
1216 | { | |
1217 | unsigned long iflags; | |
1218 | int k; | |
1219 | struct sdebug_queued_cmd * sqcp; | |
1220 | ||
1221 | spin_lock_irqsave(&queued_arr_lock, iflags); | |
1222 | for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) { | |
1223 | sqcp = &queued_arr[k]; | |
1224 | if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) { | |
1225 | del_timer_sync(&sqcp->cmnd_timer); | |
1226 | sqcp->in_use = 0; | |
1227 | sqcp->a_cmnd = NULL; | |
1228 | break; | |
1229 | } | |
1230 | } | |
1231 | spin_unlock_irqrestore(&queued_arr_lock, iflags); | |
1232 | return (k < SCSI_DEBUG_CANQUEUE) ? 1 : 0; | |
1233 | } | |
1234 | ||
1235 | /* Deletes (stops) timers of all queued commands */ | |
1236 | static void stop_all_queued(void) | |
1237 | { | |
1238 | unsigned long iflags; | |
1239 | int k; | |
1240 | struct sdebug_queued_cmd * sqcp; | |
1241 | ||
1242 | spin_lock_irqsave(&queued_arr_lock, iflags); | |
1243 | for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) { | |
1244 | sqcp = &queued_arr[k]; | |
1245 | if (sqcp->in_use && sqcp->a_cmnd) { | |
1246 | del_timer_sync(&sqcp->cmnd_timer); | |
1247 | sqcp->in_use = 0; | |
1248 | sqcp->a_cmnd = NULL; | |
1249 | } | |
1250 | } | |
1251 | spin_unlock_irqrestore(&queued_arr_lock, iflags); | |
1252 | } | |
1253 | ||
1254 | /* Initializes timers in queued array */ | |
1255 | static void __init init_all_queued(void) | |
1256 | { | |
1257 | unsigned long iflags; | |
1258 | int k; | |
1259 | struct sdebug_queued_cmd * sqcp; | |
1260 | ||
1261 | spin_lock_irqsave(&queued_arr_lock, iflags); | |
1262 | for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) { | |
1263 | sqcp = &queued_arr[k]; | |
1264 | init_timer(&sqcp->cmnd_timer); | |
1265 | sqcp->in_use = 0; | |
1266 | sqcp->a_cmnd = NULL; | |
1267 | } | |
1268 | spin_unlock_irqrestore(&queued_arr_lock, iflags); | |
1269 | } | |
1270 | ||
1271 | static void __init sdebug_build_parts(unsigned char * ramp) | |
1272 | { | |
1273 | struct partition * pp; | |
1274 | int starts[SDEBUG_MAX_PARTS + 2]; | |
1275 | int sectors_per_part, num_sectors, k; | |
1276 | int heads_by_sects, start_sec, end_sec; | |
1277 | ||
1278 | /* assume partition table already zeroed */ | |
1279 | if ((scsi_debug_num_parts < 1) || (sdebug_store_size < 1048576)) | |
1280 | return; | |
1281 | if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) { | |
1282 | scsi_debug_num_parts = SDEBUG_MAX_PARTS; | |
1283 | printk(KERN_WARNING "scsi_debug:build_parts: reducing " | |
1284 | "partitions to %d\n", SDEBUG_MAX_PARTS); | |
1285 | } | |
1286 | num_sectors = (int)(sdebug_store_size / SECT_SIZE); | |
1287 | sectors_per_part = (num_sectors - sdebug_sectors_per) | |
1288 | / scsi_debug_num_parts; | |
1289 | heads_by_sects = sdebug_heads * sdebug_sectors_per; | |
1290 | starts[0] = sdebug_sectors_per; | |
1291 | for (k = 1; k < scsi_debug_num_parts; ++k) | |
1292 | starts[k] = ((k * sectors_per_part) / heads_by_sects) | |
1293 | * heads_by_sects; | |
1294 | starts[scsi_debug_num_parts] = num_sectors; | |
1295 | starts[scsi_debug_num_parts + 1] = 0; | |
1296 | ||
1297 | ramp[510] = 0x55; /* magic partition markings */ | |
1298 | ramp[511] = 0xAA; | |
1299 | pp = (struct partition *)(ramp + 0x1be); | |
1300 | for (k = 0; starts[k + 1]; ++k, ++pp) { | |
1301 | start_sec = starts[k]; | |
1302 | end_sec = starts[k + 1] - 1; | |
1303 | pp->boot_ind = 0; | |
1304 | ||
1305 | pp->cyl = start_sec / heads_by_sects; | |
1306 | pp->head = (start_sec - (pp->cyl * heads_by_sects)) | |
1307 | / sdebug_sectors_per; | |
1308 | pp->sector = (start_sec % sdebug_sectors_per) + 1; | |
1309 | ||
1310 | pp->end_cyl = end_sec / heads_by_sects; | |
1311 | pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects)) | |
1312 | / sdebug_sectors_per; | |
1313 | pp->end_sector = (end_sec % sdebug_sectors_per) + 1; | |
1314 | ||
1315 | pp->start_sect = start_sec; | |
1316 | pp->nr_sects = end_sec - start_sec + 1; | |
1317 | pp->sys_ind = 0x83; /* plain Linux partition */ | |
1318 | } | |
1319 | } | |
1320 | ||
1321 | static int schedule_resp(struct scsi_cmnd * cmnd, | |
1322 | struct sdebug_dev_info * devip, | |
1323 | done_funct_t done, int scsi_result, int delta_jiff) | |
1324 | { | |
1325 | if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) { | |
1326 | if (scsi_result) { | |
1327 | struct scsi_device * sdp = cmnd->device; | |
1328 | ||
1329 | printk(KERN_INFO "scsi_debug: <%u %u %u %u> " | |
1330 | "non-zero result=0x%x\n", sdp->host->host_no, | |
1331 | sdp->channel, sdp->id, sdp->lun, scsi_result); | |
1332 | } | |
1333 | } | |
1334 | if (cmnd && devip) { | |
1335 | /* simulate autosense by this driver */ | |
1336 | if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff)) | |
1337 | memcpy(cmnd->sense_buffer, devip->sense_buff, | |
1338 | (SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ? | |
1339 | SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE); | |
1340 | } | |
1341 | if (delta_jiff <= 0) { | |
1342 | if (cmnd) | |
1343 | cmnd->result = scsi_result; | |
1344 | if (done) | |
1345 | done(cmnd); | |
1346 | return 0; | |
1347 | } else { | |
1348 | unsigned long iflags; | |
1349 | int k; | |
1350 | struct sdebug_queued_cmd * sqcp = NULL; | |
1351 | ||
1352 | spin_lock_irqsave(&queued_arr_lock, iflags); | |
1353 | for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) { | |
1354 | sqcp = &queued_arr[k]; | |
1355 | if (! sqcp->in_use) | |
1356 | break; | |
1357 | } | |
1358 | if (k >= SCSI_DEBUG_CANQUEUE) { | |
1359 | spin_unlock_irqrestore(&queued_arr_lock, iflags); | |
1360 | printk(KERN_WARNING "scsi_debug: can_queue exceeded\n"); | |
1361 | return 1; /* report busy to mid level */ | |
1362 | } | |
1363 | sqcp->in_use = 1; | |
1364 | sqcp->a_cmnd = cmnd; | |
1365 | sqcp->scsi_result = scsi_result; | |
1366 | sqcp->done_funct = done; | |
1367 | sqcp->cmnd_timer.function = timer_intr_handler; | |
1368 | sqcp->cmnd_timer.data = k; | |
1369 | sqcp->cmnd_timer.expires = jiffies + delta_jiff; | |
1370 | add_timer(&sqcp->cmnd_timer); | |
1371 | spin_unlock_irqrestore(&queued_arr_lock, iflags); | |
1372 | if (cmnd) | |
1373 | cmnd->result = 0; | |
1374 | return 0; | |
1375 | } | |
1376 | } | |
1377 | ||
1378 | /* Set 'perm' (4th argument) to 0 to disable module_param's definition | |
1379 | * of sysfs parameters (which module_param doesn't yet support). | |
1380 | * Sysfs parameters defined explicitly below. | |
1381 | */ | |
1382 | module_param_named(add_host, scsi_debug_add_host, int, 0); /* perm=0644 */ | |
1383 | module_param_named(delay, scsi_debug_delay, int, 0); /* perm=0644 */ | |
1384 | module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, 0); | |
1385 | module_param_named(dsense, scsi_debug_dsense, int, 0); | |
1386 | module_param_named(every_nth, scsi_debug_every_nth, int, 0); | |
1387 | module_param_named(max_luns, scsi_debug_max_luns, int, 0); | |
1388 | module_param_named(num_parts, scsi_debug_num_parts, int, 0); | |
1389 | module_param_named(num_tgts, scsi_debug_num_tgts, int, 0); | |
1390 | module_param_named(opts, scsi_debug_opts, int, 0); /* perm=0644 */ | |
1391 | module_param_named(ptype, scsi_debug_ptype, int, 0); | |
1392 | module_param_named(scsi_level, scsi_debug_scsi_level, int, 0); | |
1393 | ||
1394 | MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert"); | |
1395 | MODULE_DESCRIPTION("SCSI debug adapter driver"); | |
1396 | MODULE_LICENSE("GPL"); | |
1397 | MODULE_VERSION(SCSI_DEBUG_VERSION); | |
1398 | ||
1399 | MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)"); | |
1400 | MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)"); | |
1401 | MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs"); | |
1402 | MODULE_PARM_DESC(dsense, "use descriptor sense format(def: fixed)"); | |
1403 | MODULE_PARM_DESC(every_nth, "timeout every nth command(def=100)"); | |
1404 | MODULE_PARM_DESC(max_luns, "number of SCSI LUNs per target to simulate"); | |
1405 | MODULE_PARM_DESC(num_parts, "number of partitions(def=0)"); | |
1406 | MODULE_PARM_DESC(num_tgts, "number of SCSI targets per host to simulate"); | |
1407 | MODULE_PARM_DESC(opts, "1->noise, 2->medium_error, 4->..."); | |
1408 | MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])"); | |
1409 | MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])"); | |
1410 | ||
1411 | ||
1412 | static char sdebug_info[256]; | |
1413 | ||
1414 | static const char * scsi_debug_info(struct Scsi_Host * shp) | |
1415 | { | |
1416 | sprintf(sdebug_info, "scsi_debug, version %s [%s], " | |
1417 | "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION, | |
1418 | scsi_debug_version_date, scsi_debug_dev_size_mb, | |
1419 | scsi_debug_opts); | |
1420 | return sdebug_info; | |
1421 | } | |
1422 | ||
1423 | /* scsi_debug_proc_info | |
1424 | * Used if the driver currently has no own support for /proc/scsi | |
1425 | */ | |
1426 | static int scsi_debug_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset, | |
1427 | int length, int inout) | |
1428 | { | |
1429 | int len, pos, begin; | |
1430 | int orig_length; | |
1431 | ||
1432 | orig_length = length; | |
1433 | ||
1434 | if (inout == 1) { | |
1435 | char arr[16]; | |
1436 | int minLen = length > 15 ? 15 : length; | |
1437 | ||
1438 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
1439 | return -EACCES; | |
1440 | memcpy(arr, buffer, minLen); | |
1441 | arr[minLen] = '\0'; | |
1442 | if (1 != sscanf(arr, "%d", &pos)) | |
1443 | return -EINVAL; | |
1444 | scsi_debug_opts = pos; | |
1445 | if (scsi_debug_every_nth != 0) | |
1446 | scsi_debug_cmnd_count = 0; | |
1447 | return length; | |
1448 | } | |
1449 | begin = 0; | |
1450 | pos = len = sprintf(buffer, "scsi_debug adapter driver, version " | |
1451 | "%s [%s]\n" | |
1452 | "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, " | |
1453 | "every_nth=%d(curr:%d)\n" | |
1454 | "delay=%d, max_luns=%d, scsi_level=%d\n" | |
1455 | "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n" | |
1456 | "number of aborts=%d, device_reset=%d, bus_resets=%d, " | |
1457 | "host_resets=%d\n", | |
1458 | SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts, | |
1459 | scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth, | |
1460 | scsi_debug_cmnd_count, scsi_debug_delay, | |
1461 | scsi_debug_max_luns, scsi_debug_scsi_level, | |
1462 | SECT_SIZE, sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per, | |
1463 | num_aborts, num_dev_resets, num_bus_resets, num_host_resets); | |
1464 | if (pos < offset) { | |
1465 | len = 0; | |
1466 | begin = pos; | |
1467 | } | |
1468 | *start = buffer + (offset - begin); /* Start of wanted data */ | |
1469 | len -= (offset - begin); | |
1470 | if (len > length) | |
1471 | len = length; | |
1472 | return len; | |
1473 | } | |
1474 | ||
1475 | static ssize_t sdebug_delay_show(struct device_driver * ddp, char * buf) | |
1476 | { | |
1477 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay); | |
1478 | } | |
1479 | ||
1480 | static ssize_t sdebug_delay_store(struct device_driver * ddp, | |
1481 | const char * buf, size_t count) | |
1482 | { | |
1483 | int delay; | |
1484 | char work[20]; | |
1485 | ||
1486 | if (1 == sscanf(buf, "%10s", work)) { | |
1487 | if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) { | |
1488 | scsi_debug_delay = delay; | |
1489 | return count; | |
1490 | } | |
1491 | } | |
1492 | return -EINVAL; | |
1493 | } | |
1494 | DRIVER_ATTR(delay, S_IRUGO | S_IWUSR, sdebug_delay_show, | |
1495 | sdebug_delay_store); | |
1496 | ||
1497 | static ssize_t sdebug_opts_show(struct device_driver * ddp, char * buf) | |
1498 | { | |
1499 | return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts); | |
1500 | } | |
1501 | ||
1502 | static ssize_t sdebug_opts_store(struct device_driver * ddp, | |
1503 | const char * buf, size_t count) | |
1504 | { | |
1505 | int opts; | |
1506 | char work[20]; | |
1507 | ||
1508 | if (1 == sscanf(buf, "%10s", work)) { | |
1509 | if (0 == strnicmp(work,"0x", 2)) { | |
1510 | if (1 == sscanf(&work[2], "%x", &opts)) | |
1511 | goto opts_done; | |
1512 | } else { | |
1513 | if (1 == sscanf(work, "%d", &opts)) | |
1514 | goto opts_done; | |
1515 | } | |
1516 | } | |
1517 | return -EINVAL; | |
1518 | opts_done: | |
1519 | scsi_debug_opts = opts; | |
1520 | scsi_debug_cmnd_count = 0; | |
1521 | return count; | |
1522 | } | |
1523 | DRIVER_ATTR(opts, S_IRUGO | S_IWUSR, sdebug_opts_show, | |
1524 | sdebug_opts_store); | |
1525 | ||
1526 | static ssize_t sdebug_ptype_show(struct device_driver * ddp, char * buf) | |
1527 | { | |
1528 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype); | |
1529 | } | |
1530 | static ssize_t sdebug_ptype_store(struct device_driver * ddp, | |
1531 | const char * buf, size_t count) | |
1532 | { | |
1533 | int n; | |
1534 | ||
1535 | if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { | |
1536 | scsi_debug_ptype = n; | |
1537 | return count; | |
1538 | } | |
1539 | return -EINVAL; | |
1540 | } | |
1541 | DRIVER_ATTR(ptype, S_IRUGO | S_IWUSR, sdebug_ptype_show, sdebug_ptype_store); | |
1542 | ||
1543 | static ssize_t sdebug_dsense_show(struct device_driver * ddp, char * buf) | |
1544 | { | |
1545 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense); | |
1546 | } | |
1547 | static ssize_t sdebug_dsense_store(struct device_driver * ddp, | |
1548 | const char * buf, size_t count) | |
1549 | { | |
1550 | int n; | |
1551 | ||
1552 | if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { | |
1553 | scsi_debug_dsense = n; | |
1554 | return count; | |
1555 | } | |
1556 | return -EINVAL; | |
1557 | } | |
1558 | DRIVER_ATTR(dsense, S_IRUGO | S_IWUSR, sdebug_dsense_show, | |
1559 | sdebug_dsense_store); | |
1560 | ||
1561 | static ssize_t sdebug_num_tgts_show(struct device_driver * ddp, char * buf) | |
1562 | { | |
1563 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts); | |
1564 | } | |
1565 | static ssize_t sdebug_num_tgts_store(struct device_driver * ddp, | |
1566 | const char * buf, size_t count) | |
1567 | { | |
1568 | int n; | |
1569 | ||
1570 | if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { | |
1571 | scsi_debug_num_tgts = n; | |
1572 | sdebug_max_tgts_luns(); | |
1573 | return count; | |
1574 | } | |
1575 | return -EINVAL; | |
1576 | } | |
1577 | DRIVER_ATTR(num_tgts, S_IRUGO | S_IWUSR, sdebug_num_tgts_show, | |
1578 | sdebug_num_tgts_store); | |
1579 | ||
1580 | static ssize_t sdebug_dev_size_mb_show(struct device_driver * ddp, char * buf) | |
1581 | { | |
1582 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb); | |
1583 | } | |
1584 | DRIVER_ATTR(dev_size_mb, S_IRUGO, sdebug_dev_size_mb_show, NULL); | |
1585 | ||
1586 | static ssize_t sdebug_num_parts_show(struct device_driver * ddp, char * buf) | |
1587 | { | |
1588 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts); | |
1589 | } | |
1590 | DRIVER_ATTR(num_parts, S_IRUGO, sdebug_num_parts_show, NULL); | |
1591 | ||
1592 | static ssize_t sdebug_every_nth_show(struct device_driver * ddp, char * buf) | |
1593 | { | |
1594 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth); | |
1595 | } | |
1596 | static ssize_t sdebug_every_nth_store(struct device_driver * ddp, | |
1597 | const char * buf, size_t count) | |
1598 | { | |
1599 | int nth; | |
1600 | ||
1601 | if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) { | |
1602 | scsi_debug_every_nth = nth; | |
1603 | scsi_debug_cmnd_count = 0; | |
1604 | return count; | |
1605 | } | |
1606 | return -EINVAL; | |
1607 | } | |
1608 | DRIVER_ATTR(every_nth, S_IRUGO | S_IWUSR, sdebug_every_nth_show, | |
1609 | sdebug_every_nth_store); | |
1610 | ||
1611 | static ssize_t sdebug_max_luns_show(struct device_driver * ddp, char * buf) | |
1612 | { | |
1613 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns); | |
1614 | } | |
1615 | static ssize_t sdebug_max_luns_store(struct device_driver * ddp, | |
1616 | const char * buf, size_t count) | |
1617 | { | |
1618 | int n; | |
1619 | ||
1620 | if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { | |
1621 | scsi_debug_max_luns = n; | |
1622 | sdebug_max_tgts_luns(); | |
1623 | return count; | |
1624 | } | |
1625 | return -EINVAL; | |
1626 | } | |
1627 | DRIVER_ATTR(max_luns, S_IRUGO | S_IWUSR, sdebug_max_luns_show, | |
1628 | sdebug_max_luns_store); | |
1629 | ||
1630 | static ssize_t sdebug_scsi_level_show(struct device_driver * ddp, char * buf) | |
1631 | { | |
1632 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level); | |
1633 | } | |
1634 | DRIVER_ATTR(scsi_level, S_IRUGO, sdebug_scsi_level_show, NULL); | |
1635 | ||
1636 | static ssize_t sdebug_add_host_show(struct device_driver * ddp, char * buf) | |
1637 | { | |
1638 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host); | |
1639 | } | |
1640 | ||
1641 | static ssize_t sdebug_add_host_store(struct device_driver * ddp, | |
1642 | const char * buf, size_t count) | |
1643 | { | |
1644 | int delta_hosts; | |
1645 | char work[20]; | |
1646 | ||
1647 | if (1 != sscanf(buf, "%10s", work)) | |
1648 | return -EINVAL; | |
1649 | { /* temporary hack around sscanf() problem with -ve nums */ | |
1650 | int neg = 0; | |
1651 | ||
1652 | if ('-' == *work) | |
1653 | neg = 1; | |
1654 | if (1 != sscanf(work + neg, "%d", &delta_hosts)) | |
1655 | return -EINVAL; | |
1656 | if (neg) | |
1657 | delta_hosts = -delta_hosts; | |
1658 | } | |
1659 | if (delta_hosts > 0) { | |
1660 | do { | |
1661 | sdebug_add_adapter(); | |
1662 | } while (--delta_hosts); | |
1663 | } else if (delta_hosts < 0) { | |
1664 | do { | |
1665 | sdebug_remove_adapter(); | |
1666 | } while (++delta_hosts); | |
1667 | } | |
1668 | return count; | |
1669 | } | |
1670 | DRIVER_ATTR(add_host, S_IRUGO | S_IWUSR, sdebug_add_host_show, | |
1671 | sdebug_add_host_store); | |
1672 | ||
1673 | static void do_create_driverfs_files(void) | |
1674 | { | |
1675 | driver_create_file(&sdebug_driverfs_driver, &driver_attr_add_host); | |
1676 | driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay); | |
1677 | driver_create_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb); | |
1678 | driver_create_file(&sdebug_driverfs_driver, &driver_attr_dsense); | |
1679 | driver_create_file(&sdebug_driverfs_driver, &driver_attr_every_nth); | |
1680 | driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_luns); | |
1681 | driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_tgts); | |
1682 | driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_parts); | |
1683 | driver_create_file(&sdebug_driverfs_driver, &driver_attr_ptype); | |
1684 | driver_create_file(&sdebug_driverfs_driver, &driver_attr_opts); | |
1685 | driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level); | |
1686 | } | |
1687 | ||
1688 | static void do_remove_driverfs_files(void) | |
1689 | { | |
1690 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level); | |
1691 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_opts); | |
1692 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ptype); | |
1693 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_parts); | |
1694 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_tgts); | |
1695 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_luns); | |
1696 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_every_nth); | |
1697 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dsense); | |
1698 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb); | |
1699 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay); | |
1700 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host); | |
1701 | } | |
1702 | ||
1703 | static int __init scsi_debug_init(void) | |
1704 | { | |
1705 | unsigned long sz; | |
1706 | int host_to_add; | |
1707 | int k; | |
1708 | ||
1709 | if (scsi_debug_dev_size_mb < 1) | |
1710 | scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */ | |
1711 | sdebug_store_size = (unsigned long)scsi_debug_dev_size_mb * 1048576; | |
1712 | sdebug_capacity = sdebug_store_size / SECT_SIZE; | |
1713 | ||
1714 | /* play around with geometry, don't waste too much on track 0 */ | |
1715 | sdebug_heads = 8; | |
1716 | sdebug_sectors_per = 32; | |
1717 | if (scsi_debug_dev_size_mb >= 16) | |
1718 | sdebug_heads = 32; | |
1719 | else if (scsi_debug_dev_size_mb >= 256) | |
1720 | sdebug_heads = 64; | |
1721 | sdebug_cylinders_per = (unsigned long)sdebug_capacity / | |
1722 | (sdebug_sectors_per * sdebug_heads); | |
1723 | if (sdebug_cylinders_per >= 1024) { | |
1724 | /* other LLDs do this; implies >= 1GB ram disk ... */ | |
1725 | sdebug_heads = 255; | |
1726 | sdebug_sectors_per = 63; | |
1727 | sdebug_cylinders_per = (unsigned long)sdebug_capacity / | |
1728 | (sdebug_sectors_per * sdebug_heads); | |
1729 | } | |
1730 | ||
1731 | sz = sdebug_store_size; | |
1732 | fake_storep = vmalloc(sz); | |
1733 | if (NULL == fake_storep) { | |
1734 | printk(KERN_ERR "scsi_debug_init: out of memory, 1\n"); | |
1735 | return -ENOMEM; | |
1736 | } | |
1737 | memset(fake_storep, 0, sz); | |
1738 | if (scsi_debug_num_parts > 0) | |
1739 | sdebug_build_parts(fake_storep); | |
1740 | ||
1741 | init_all_queued(); | |
1742 | ||
1743 | device_register(&pseudo_primary); | |
1744 | bus_register(&pseudo_lld_bus); | |
1745 | driver_register(&sdebug_driverfs_driver); | |
1746 | do_create_driverfs_files(); | |
1747 | ||
1748 | sdebug_driver_template.proc_name = (char *)sdebug_proc_name; | |
1749 | ||
1750 | host_to_add = scsi_debug_add_host; | |
1751 | scsi_debug_add_host = 0; | |
1752 | ||
1753 | for (k = 0; k < host_to_add; k++) { | |
1754 | if (sdebug_add_adapter()) { | |
1755 | printk(KERN_ERR "scsi_debug_init: " | |
1756 | "sdebug_add_adapter failed k=%d\n", k); | |
1757 | break; | |
1758 | } | |
1759 | } | |
1760 | ||
1761 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) { | |
1762 | printk(KERN_INFO "scsi_debug_init: built %d host(s)\n", | |
1763 | scsi_debug_add_host); | |
1764 | } | |
1765 | return 0; | |
1766 | } | |
1767 | ||
1768 | static void __exit scsi_debug_exit(void) | |
1769 | { | |
1770 | int k = scsi_debug_add_host; | |
1771 | ||
1772 | stop_all_queued(); | |
1773 | for (; k; k--) | |
1774 | sdebug_remove_adapter(); | |
1775 | do_remove_driverfs_files(); | |
1776 | driver_unregister(&sdebug_driverfs_driver); | |
1777 | bus_unregister(&pseudo_lld_bus); | |
1778 | device_unregister(&pseudo_primary); | |
1779 | ||
1780 | vfree(fake_storep); | |
1781 | } | |
1782 | ||
1783 | device_initcall(scsi_debug_init); | |
1784 | module_exit(scsi_debug_exit); | |
1785 | ||
1786 | void pseudo_0_release(struct device * dev) | |
1787 | { | |
1788 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) | |
1789 | printk(KERN_INFO "scsi_debug: pseudo_0_release() called\n"); | |
1790 | } | |
1791 | ||
1792 | static struct device pseudo_primary = { | |
1793 | .bus_id = "pseudo_0", | |
1794 | .release = pseudo_0_release, | |
1795 | }; | |
1796 | ||
1797 | static int pseudo_lld_bus_match(struct device *dev, | |
1798 | struct device_driver *dev_driver) | |
1799 | { | |
1800 | return 1; | |
1801 | } | |
1802 | ||
1803 | static struct bus_type pseudo_lld_bus = { | |
1804 | .name = "pseudo", | |
1805 | .match = pseudo_lld_bus_match, | |
1806 | }; | |
1807 | ||
1808 | static void sdebug_release_adapter(struct device * dev) | |
1809 | { | |
1810 | struct sdebug_host_info *sdbg_host; | |
1811 | ||
1812 | sdbg_host = to_sdebug_host(dev); | |
1813 | kfree(sdbg_host); | |
1814 | } | |
1815 | ||
1816 | static int sdebug_add_adapter(void) | |
1817 | { | |
1818 | int k, devs_per_host; | |
1819 | int error = 0; | |
1820 | struct sdebug_host_info *sdbg_host; | |
1821 | struct sdebug_dev_info *sdbg_devinfo; | |
1822 | struct list_head *lh, *lh_sf; | |
1823 | ||
1824 | sdbg_host = kmalloc(sizeof(*sdbg_host),GFP_KERNEL); | |
1825 | ||
1826 | if (NULL == sdbg_host) { | |
1827 | printk(KERN_ERR "%s: out of memory at line %d\n", | |
1828 | __FUNCTION__, __LINE__); | |
1829 | return -ENOMEM; | |
1830 | } | |
1831 | ||
1832 | memset(sdbg_host, 0, sizeof(*sdbg_host)); | |
1833 | INIT_LIST_HEAD(&sdbg_host->dev_info_list); | |
1834 | ||
1835 | devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns; | |
1836 | for (k = 0; k < devs_per_host; k++) { | |
1837 | sdbg_devinfo = kmalloc(sizeof(*sdbg_devinfo),GFP_KERNEL); | |
1838 | if (NULL == sdbg_devinfo) { | |
1839 | printk(KERN_ERR "%s: out of memory at line %d\n", | |
1840 | __FUNCTION__, __LINE__); | |
1841 | error = -ENOMEM; | |
1842 | goto clean; | |
1843 | } | |
1844 | memset(sdbg_devinfo, 0, sizeof(*sdbg_devinfo)); | |
1845 | sdbg_devinfo->sdbg_host = sdbg_host; | |
1846 | list_add_tail(&sdbg_devinfo->dev_list, | |
1847 | &sdbg_host->dev_info_list); | |
1848 | } | |
1849 | ||
1850 | spin_lock(&sdebug_host_list_lock); | |
1851 | list_add_tail(&sdbg_host->host_list, &sdebug_host_list); | |
1852 | spin_unlock(&sdebug_host_list_lock); | |
1853 | ||
1854 | sdbg_host->dev.bus = &pseudo_lld_bus; | |
1855 | sdbg_host->dev.parent = &pseudo_primary; | |
1856 | sdbg_host->dev.release = &sdebug_release_adapter; | |
1857 | sprintf(sdbg_host->dev.bus_id, "adapter%d", scsi_debug_add_host); | |
1858 | ||
1859 | error = device_register(&sdbg_host->dev); | |
1860 | ||
1861 | if (error) | |
1862 | goto clean; | |
1863 | ||
1864 | ++scsi_debug_add_host; | |
1865 | return error; | |
1866 | ||
1867 | clean: | |
1868 | list_for_each_safe(lh, lh_sf, &sdbg_host->dev_info_list) { | |
1869 | sdbg_devinfo = list_entry(lh, struct sdebug_dev_info, | |
1870 | dev_list); | |
1871 | list_del(&sdbg_devinfo->dev_list); | |
1872 | kfree(sdbg_devinfo); | |
1873 | } | |
1874 | ||
1875 | kfree(sdbg_host); | |
1876 | return error; | |
1877 | } | |
1878 | ||
1879 | static void sdebug_remove_adapter(void) | |
1880 | { | |
1881 | struct sdebug_host_info * sdbg_host = NULL; | |
1882 | ||
1883 | spin_lock(&sdebug_host_list_lock); | |
1884 | if (!list_empty(&sdebug_host_list)) { | |
1885 | sdbg_host = list_entry(sdebug_host_list.prev, | |
1886 | struct sdebug_host_info, host_list); | |
1887 | list_del(&sdbg_host->host_list); | |
1888 | } | |
1889 | spin_unlock(&sdebug_host_list_lock); | |
1890 | ||
1891 | if (!sdbg_host) | |
1892 | return; | |
1893 | ||
1894 | device_unregister(&sdbg_host->dev); | |
1895 | --scsi_debug_add_host; | |
1896 | } | |
1897 | ||
1898 | static int sdebug_driver_probe(struct device * dev) | |
1899 | { | |
1900 | int error = 0; | |
1901 | struct sdebug_host_info *sdbg_host; | |
1902 | struct Scsi_Host *hpnt; | |
1903 | ||
1904 | sdbg_host = to_sdebug_host(dev); | |
1905 | ||
1906 | hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host)); | |
1907 | if (NULL == hpnt) { | |
1908 | printk(KERN_ERR "%s: scsi_register failed\n", __FUNCTION__); | |
1909 | error = -ENODEV; | |
1910 | return error; | |
1911 | } | |
1912 | ||
1913 | sdbg_host->shost = hpnt; | |
1914 | *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host; | |
1915 | if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id)) | |
1916 | hpnt->max_id = scsi_debug_num_tgts + 1; | |
1917 | else | |
1918 | hpnt->max_id = scsi_debug_num_tgts; | |
1919 | hpnt->max_lun = scsi_debug_max_luns; | |
1920 | ||
1921 | error = scsi_add_host(hpnt, &sdbg_host->dev); | |
1922 | if (error) { | |
1923 | printk(KERN_ERR "%s: scsi_add_host failed\n", __FUNCTION__); | |
1924 | error = -ENODEV; | |
1925 | scsi_host_put(hpnt); | |
1926 | } else | |
1927 | scsi_scan_host(hpnt); | |
1928 | ||
1929 | ||
1930 | return error; | |
1931 | } | |
1932 | ||
1933 | static int sdebug_driver_remove(struct device * dev) | |
1934 | { | |
1935 | struct list_head *lh, *lh_sf; | |
1936 | struct sdebug_host_info *sdbg_host; | |
1937 | struct sdebug_dev_info *sdbg_devinfo; | |
1938 | ||
1939 | sdbg_host = to_sdebug_host(dev); | |
1940 | ||
1941 | if (!sdbg_host) { | |
1942 | printk(KERN_ERR "%s: Unable to locate host info\n", | |
1943 | __FUNCTION__); | |
1944 | return -ENODEV; | |
1945 | } | |
1946 | ||
1947 | scsi_remove_host(sdbg_host->shost); | |
1948 | ||
1949 | list_for_each_safe(lh, lh_sf, &sdbg_host->dev_info_list) { | |
1950 | sdbg_devinfo = list_entry(lh, struct sdebug_dev_info, | |
1951 | dev_list); | |
1952 | list_del(&sdbg_devinfo->dev_list); | |
1953 | kfree(sdbg_devinfo); | |
1954 | } | |
1955 | ||
1956 | scsi_host_put(sdbg_host->shost); | |
1957 | return 0; | |
1958 | } | |
1959 | ||
1960 | static void sdebug_max_tgts_luns(void) | |
1961 | { | |
1962 | struct sdebug_host_info * sdbg_host; | |
1963 | struct Scsi_Host *hpnt; | |
1964 | ||
1965 | spin_lock(&sdebug_host_list_lock); | |
1966 | list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { | |
1967 | hpnt = sdbg_host->shost; | |
1968 | if ((hpnt->this_id >= 0) && | |
1969 | (scsi_debug_num_tgts > hpnt->this_id)) | |
1970 | hpnt->max_id = scsi_debug_num_tgts + 1; | |
1971 | else | |
1972 | hpnt->max_id = scsi_debug_num_tgts; | |
1973 | hpnt->max_lun = scsi_debug_max_luns; | |
1974 | } | |
1975 | spin_unlock(&sdebug_host_list_lock); | |
1976 | } |