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1 | /* |
2 | * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv |
3 | * Copyright (C) 1992 Eric Youngdale |
4 | * Simulate a host adapter with 2 disks attached. Do a lot of checking |
5 | * to make sure that we are not getting blocks mixed up, and PANIC if |
6 | * anything out of the ordinary is seen. |
7 | * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
8 | * |
9 | * This version is more generic, simulating a variable number of disk |
10 | * (or disk like devices) sharing a common amount of RAM. To be more |
11 | * realistic, the simulated devices have the transport attributes of |
12 | * SAS disks. |
13 | * |
14 | * |
15 | * For documentation see http://www.torque.net/sg/sdebug26.html |
16 | * |
17 | * D. Gilbert (dpg) work for Magneto-Optical device test [20010421] |
18 | * dpg: work for devfs large number of disks [20010809] |
19 | * forked for lk 2.5 series [20011216, 20020101] |
20 | * use vmalloc() more inquiry+mode_sense [20020302] |
21 | * add timers for delayed responses [20020721] |
22 | * Patrick Mansfield <patmans@us.ibm.com> max_luns+scsi_level [20021031] |
23 | * Mike Anderson <andmike@us.ibm.com> sysfs work [20021118] |
24 | * dpg: change style of boot options to "scsi_debug.num_tgts=2" and |
25 | * module options to "modprobe scsi_debug num_tgts=2" [20021221] |
26 | */ |
27 | |
28 | #include <linux/module.h> |
29 | |
30 | #include <linux/kernel.h> |
31 | #include <linux/errno.h> |
32 | #include <linux/timer.h> |
33 | #include <linux/slab.h> |
34 | #include <linux/types.h> |
35 | #include <linux/string.h> |
36 | #include <linux/genhd.h> |
37 | #include <linux/fs.h> |
38 | #include <linux/init.h> |
39 | #include <linux/proc_fs.h> |
40 | #include <linux/vmalloc.h> |
41 | #include <linux/moduleparam.h> |
42 | #include <linux/scatterlist.h> |
43 | #include <linux/blkdev.h> |
44 | #include <linux/crc-t10dif.h> |
45 | |
46 | #include <net/checksum.h> |
47 | |
48 | #include <asm/unaligned.h> |
49 | |
50 | #include <scsi/scsi.h> |
51 | #include <scsi/scsi_cmnd.h> |
52 | #include <scsi/scsi_device.h> |
53 | #include <scsi/scsi_host.h> |
54 | #include <scsi/scsicam.h> |
55 | #include <scsi/scsi_eh.h> |
56 | #include <scsi/scsi_dbg.h> |
57 | |
58 | #include "sd.h" |
59 | #include "scsi_logging.h" |
60 | |
61 | #define SCSI_DEBUG_VERSION "1.81" |
62 | static const char * scsi_debug_version_date = "20070104"; |
63 | |
64 | /* Additional Sense Code (ASC) */ |
65 | #define NO_ADDITIONAL_SENSE 0x0 |
66 | #define LOGICAL_UNIT_NOT_READY 0x4 |
67 | #define UNRECOVERED_READ_ERR 0x11 |
68 | #define PARAMETER_LIST_LENGTH_ERR 0x1a |
69 | #define INVALID_OPCODE 0x20 |
70 | #define ADDR_OUT_OF_RANGE 0x21 |
71 | #define INVALID_COMMAND_OPCODE 0x20 |
72 | #define INVALID_FIELD_IN_CDB 0x24 |
73 | #define INVALID_FIELD_IN_PARAM_LIST 0x26 |
74 | #define POWERON_RESET 0x29 |
75 | #define SAVING_PARAMS_UNSUP 0x39 |
76 | #define TRANSPORT_PROBLEM 0x4b |
77 | #define THRESHOLD_EXCEEDED 0x5d |
78 | #define LOW_POWER_COND_ON 0x5e |
79 | |
80 | /* Additional Sense Code Qualifier (ASCQ) */ |
81 | #define ACK_NAK_TO 0x3 |
82 | |
83 | #define SDEBUG_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */ |
84 | |
85 | /* Default values for driver parameters */ |
86 | #define DEF_NUM_HOST 1 |
87 | #define DEF_NUM_TGTS 1 |
88 | #define DEF_MAX_LUNS 1 |
89 | /* With these defaults, this driver will make 1 host with 1 target |
90 | * (id 0) containing 1 logical unit (lun 0). That is 1 device. |
91 | */ |
92 | #define DEF_DELAY 1 |
93 | #define DEF_DEV_SIZE_MB 8 |
94 | #define DEF_EVERY_NTH 0 |
95 | #define DEF_NUM_PARTS 0 |
96 | #define DEF_OPTS 0 |
97 | #define DEF_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */ |
98 | #define DEF_PTYPE 0 |
99 | #define DEF_D_SENSE 0 |
100 | #define DEF_NO_LUN_0 0 |
101 | #define DEF_VIRTUAL_GB 0 |
102 | #define DEF_FAKE_RW 0 |
103 | #define DEF_VPD_USE_HOSTNO 1 |
104 | #define DEF_SECTOR_SIZE 512 |
105 | #define DEF_DIX 0 |
106 | #define DEF_DIF 0 |
107 | #define DEF_GUARD 0 |
108 | #define DEF_ATO 1 |
109 | #define DEF_PHYSBLK_EXP 0 |
110 | #define DEF_LOWEST_ALIGNED 0 |
111 | #define DEF_UNMAP_MAX_BLOCKS 0 |
112 | #define DEF_UNMAP_MAX_DESC 0 |
113 | #define DEF_UNMAP_GRANULARITY 0 |
114 | #define DEF_UNMAP_ALIGNMENT 0 |
115 | |
116 | /* bit mask values for scsi_debug_opts */ |
117 | #define SCSI_DEBUG_OPT_NOISE 1 |
118 | #define SCSI_DEBUG_OPT_MEDIUM_ERR 2 |
119 | #define SCSI_DEBUG_OPT_TIMEOUT 4 |
120 | #define SCSI_DEBUG_OPT_RECOVERED_ERR 8 |
121 | #define SCSI_DEBUG_OPT_TRANSPORT_ERR 16 |
122 | #define SCSI_DEBUG_OPT_DIF_ERR 32 |
123 | #define SCSI_DEBUG_OPT_DIX_ERR 64 |
124 | /* When "every_nth" > 0 then modulo "every_nth" commands: |
125 | * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set |
126 | * - a RECOVERED_ERROR is simulated on successful read and write |
127 | * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set. |
128 | * - a TRANSPORT_ERROR is simulated on successful read and write |
129 | * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set. |
130 | * |
131 | * When "every_nth" < 0 then after "- every_nth" commands: |
132 | * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set |
133 | * - a RECOVERED_ERROR is simulated on successful read and write |
134 | * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set. |
135 | * - a TRANSPORT_ERROR is simulated on successful read and write |
136 | * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set. |
137 | * This will continue until some other action occurs (e.g. the user |
138 | * writing a new value (other than -1 or 1) to every_nth via sysfs). |
139 | */ |
140 | |
141 | /* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this |
142 | * sector on read commands: */ |
143 | #define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */ |
144 | |
145 | /* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1) |
146 | * or "peripheral device" addressing (value 0) */ |
147 | #define SAM2_LUN_ADDRESS_METHOD 0 |
148 | #define SAM2_WLUN_REPORT_LUNS 0xc101 |
149 | |
150 | static int scsi_debug_add_host = DEF_NUM_HOST; |
151 | static int scsi_debug_delay = DEF_DELAY; |
152 | static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB; |
153 | static int scsi_debug_every_nth = DEF_EVERY_NTH; |
154 | static int scsi_debug_max_luns = DEF_MAX_LUNS; |
155 | static int scsi_debug_num_parts = DEF_NUM_PARTS; |
156 | static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */ |
157 | static int scsi_debug_opts = DEF_OPTS; |
158 | static int scsi_debug_scsi_level = DEF_SCSI_LEVEL; |
159 | static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */ |
160 | static int scsi_debug_dsense = DEF_D_SENSE; |
161 | static int scsi_debug_no_lun_0 = DEF_NO_LUN_0; |
162 | static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB; |
163 | static int scsi_debug_fake_rw = DEF_FAKE_RW; |
164 | static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO; |
165 | static int scsi_debug_sector_size = DEF_SECTOR_SIZE; |
166 | static int scsi_debug_dix = DEF_DIX; |
167 | static int scsi_debug_dif = DEF_DIF; |
168 | static int scsi_debug_guard = DEF_GUARD; |
169 | static int scsi_debug_ato = DEF_ATO; |
170 | static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP; |
171 | static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED; |
172 | static int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC; |
173 | static int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS; |
174 | static int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY; |
175 | static int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT; |
176 | |
177 | static int scsi_debug_cmnd_count = 0; |
178 | |
179 | #define DEV_READONLY(TGT) (0) |
180 | #define DEV_REMOVEABLE(TGT) (0) |
181 | |
182 | static unsigned int sdebug_store_sectors; |
183 | static sector_t sdebug_capacity; /* in sectors */ |
184 | |
185 | /* old BIOS stuff, kernel may get rid of them but some mode sense pages |
186 | may still need them */ |
187 | static int sdebug_heads; /* heads per disk */ |
188 | static int sdebug_cylinders_per; /* cylinders per surface */ |
189 | static int sdebug_sectors_per; /* sectors per cylinder */ |
190 | |
191 | #define SDEBUG_MAX_PARTS 4 |
192 | |
193 | #define SDEBUG_SENSE_LEN 32 |
194 | |
195 | #define SCSI_DEBUG_CANQUEUE 255 |
196 | #define SCSI_DEBUG_MAX_CMD_LEN 32 |
197 | |
198 | struct sdebug_dev_info { |
199 | struct list_head dev_list; |
200 | unsigned char sense_buff[SDEBUG_SENSE_LEN]; /* weak nexus */ |
201 | unsigned int channel; |
202 | unsigned int target; |
203 | unsigned int lun; |
204 | struct sdebug_host_info *sdbg_host; |
205 | unsigned int wlun; |
206 | char reset; |
207 | char stopped; |
208 | char used; |
209 | }; |
210 | |
211 | struct sdebug_host_info { |
212 | struct list_head host_list; |
213 | struct Scsi_Host *shost; |
214 | struct device dev; |
215 | struct list_head dev_info_list; |
216 | }; |
217 | |
218 | #define to_sdebug_host(d) \ |
219 | container_of(d, struct sdebug_host_info, dev) |
220 | |
221 | static LIST_HEAD(sdebug_host_list); |
222 | static DEFINE_SPINLOCK(sdebug_host_list_lock); |
223 | |
224 | typedef void (* done_funct_t) (struct scsi_cmnd *); |
225 | |
226 | struct sdebug_queued_cmd { |
227 | int in_use; |
228 | struct timer_list cmnd_timer; |
229 | done_funct_t done_funct; |
230 | struct scsi_cmnd * a_cmnd; |
231 | int scsi_result; |
232 | }; |
233 | static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE]; |
234 | |
235 | static unsigned char * fake_storep; /* ramdisk storage */ |
236 | static unsigned char *dif_storep; /* protection info */ |
237 | static void *map_storep; /* provisioning map */ |
238 | |
239 | static unsigned long map_size; |
240 | static int num_aborts = 0; |
241 | static int num_dev_resets = 0; |
242 | static int num_bus_resets = 0; |
243 | static int num_host_resets = 0; |
244 | static int dix_writes; |
245 | static int dix_reads; |
246 | static int dif_errors; |
247 | |
248 | static DEFINE_SPINLOCK(queued_arr_lock); |
249 | static DEFINE_RWLOCK(atomic_rw); |
250 | |
251 | static char sdebug_proc_name[] = "scsi_debug"; |
252 | |
253 | static struct bus_type pseudo_lld_bus; |
254 | |
255 | static inline sector_t dif_offset(sector_t sector) |
256 | { |
257 | return sector << 3; |
258 | } |
259 | |
260 | static struct device_driver sdebug_driverfs_driver = { |
261 | .name = sdebug_proc_name, |
262 | .bus = &pseudo_lld_bus, |
263 | }; |
264 | |
265 | static const int check_condition_result = |
266 | (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
267 | |
268 | static const int illegal_condition_result = |
269 | (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION; |
270 | |
271 | static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, |
272 | 0, 0, 0x2, 0x4b}; |
273 | static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, |
274 | 0, 0, 0x0, 0x0}; |
275 | |
276 | static int sdebug_add_adapter(void); |
277 | static void sdebug_remove_adapter(void); |
278 | |
279 | static void sdebug_max_tgts_luns(void) |
280 | { |
281 | struct sdebug_host_info *sdbg_host; |
282 | struct Scsi_Host *hpnt; |
283 | |
284 | spin_lock(&sdebug_host_list_lock); |
285 | list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { |
286 | hpnt = sdbg_host->shost; |
287 | if ((hpnt->this_id >= 0) && |
288 | (scsi_debug_num_tgts > hpnt->this_id)) |
289 | hpnt->max_id = scsi_debug_num_tgts + 1; |
290 | else |
291 | hpnt->max_id = scsi_debug_num_tgts; |
292 | /* scsi_debug_max_luns; */ |
293 | hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; |
294 | } |
295 | spin_unlock(&sdebug_host_list_lock); |
296 | } |
297 | |
298 | static void mk_sense_buffer(struct sdebug_dev_info *devip, int key, |
299 | int asc, int asq) |
300 | { |
301 | unsigned char *sbuff; |
302 | |
303 | sbuff = devip->sense_buff; |
304 | memset(sbuff, 0, SDEBUG_SENSE_LEN); |
305 | |
306 | scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq); |
307 | |
308 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) |
309 | printk(KERN_INFO "scsi_debug: [sense_key,asc,ascq]: " |
310 | "[0x%x,0x%x,0x%x]\n", key, asc, asq); |
311 | } |
312 | |
313 | static void get_data_transfer_info(unsigned char *cmd, |
314 | unsigned long long *lba, unsigned int *num, |
315 | u32 *ei_lba) |
316 | { |
317 | *ei_lba = 0; |
318 | |
319 | switch (*cmd) { |
320 | case VARIABLE_LENGTH_CMD: |
321 | *lba = (u64)cmd[19] | (u64)cmd[18] << 8 | |
322 | (u64)cmd[17] << 16 | (u64)cmd[16] << 24 | |
323 | (u64)cmd[15] << 32 | (u64)cmd[14] << 40 | |
324 | (u64)cmd[13] << 48 | (u64)cmd[12] << 56; |
325 | |
326 | *ei_lba = (u32)cmd[23] | (u32)cmd[22] << 8 | |
327 | (u32)cmd[21] << 16 | (u32)cmd[20] << 24; |
328 | |
329 | *num = (u32)cmd[31] | (u32)cmd[30] << 8 | (u32)cmd[29] << 16 | |
330 | (u32)cmd[28] << 24; |
331 | break; |
332 | |
333 | case WRITE_SAME_16: |
334 | case WRITE_16: |
335 | case READ_16: |
336 | *lba = (u64)cmd[9] | (u64)cmd[8] << 8 | |
337 | (u64)cmd[7] << 16 | (u64)cmd[6] << 24 | |
338 | (u64)cmd[5] << 32 | (u64)cmd[4] << 40 | |
339 | (u64)cmd[3] << 48 | (u64)cmd[2] << 56; |
340 | |
341 | *num = (u32)cmd[13] | (u32)cmd[12] << 8 | (u32)cmd[11] << 16 | |
342 | (u32)cmd[10] << 24; |
343 | break; |
344 | case WRITE_12: |
345 | case READ_12: |
346 | *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 | |
347 | (u32)cmd[2] << 24; |
348 | |
349 | *num = (u32)cmd[9] | (u32)cmd[8] << 8 | (u32)cmd[7] << 16 | |
350 | (u32)cmd[6] << 24; |
351 | break; |
352 | case WRITE_SAME: |
353 | case WRITE_10: |
354 | case READ_10: |
355 | case XDWRITEREAD_10: |
356 | *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 | |
357 | (u32)cmd[2] << 24; |
358 | |
359 | *num = (u32)cmd[8] | (u32)cmd[7] << 8; |
360 | break; |
361 | case WRITE_6: |
362 | case READ_6: |
363 | *lba = (u32)cmd[3] | (u32)cmd[2] << 8 | |
364 | (u32)(cmd[1] & 0x1f) << 16; |
365 | *num = (0 == cmd[4]) ? 256 : cmd[4]; |
366 | break; |
367 | default: |
368 | break; |
369 | } |
370 | } |
371 | |
372 | static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg) |
373 | { |
374 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) { |
375 | printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd); |
376 | } |
377 | return -EINVAL; |
378 | /* return -ENOTTY; // correct return but upsets fdisk */ |
379 | } |
380 | |
381 | static int check_readiness(struct scsi_cmnd * SCpnt, int reset_only, |
382 | struct sdebug_dev_info * devip) |
383 | { |
384 | if (devip->reset) { |
385 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) |
386 | printk(KERN_INFO "scsi_debug: Reporting Unit " |
387 | "attention: power on reset\n"); |
388 | devip->reset = 0; |
389 | mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0); |
390 | return check_condition_result; |
391 | } |
392 | if ((0 == reset_only) && devip->stopped) { |
393 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) |
394 | printk(KERN_INFO "scsi_debug: Reporting Not " |
395 | "ready: initializing command required\n"); |
396 | mk_sense_buffer(devip, NOT_READY, LOGICAL_UNIT_NOT_READY, |
397 | 0x2); |
398 | return check_condition_result; |
399 | } |
400 | return 0; |
401 | } |
402 | |
403 | /* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */ |
404 | static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr, |
405 | int arr_len) |
406 | { |
407 | int act_len; |
408 | struct scsi_data_buffer *sdb = scsi_in(scp); |
409 | |
410 | if (!sdb->length) |
411 | return 0; |
412 | if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE)) |
413 | return (DID_ERROR << 16); |
414 | |
415 | act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents, |
416 | arr, arr_len); |
417 | if (sdb->resid) |
418 | sdb->resid -= act_len; |
419 | else |
420 | sdb->resid = scsi_bufflen(scp) - act_len; |
421 | |
422 | return 0; |
423 | } |
424 | |
425 | /* Returns number of bytes fetched into 'arr' or -1 if error. */ |
426 | static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr, |
427 | int arr_len) |
428 | { |
429 | if (!scsi_bufflen(scp)) |
430 | return 0; |
431 | if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE)) |
432 | return -1; |
433 | |
434 | return scsi_sg_copy_to_buffer(scp, arr, arr_len); |
435 | } |
436 | |
437 | |
438 | static const char * inq_vendor_id = "Linux "; |
439 | static const char * inq_product_id = "scsi_debug "; |
440 | static const char * inq_product_rev = "0004"; |
441 | |
442 | static int inquiry_evpd_83(unsigned char * arr, int port_group_id, |
443 | int target_dev_id, int dev_id_num, |
444 | const char * dev_id_str, |
445 | int dev_id_str_len) |
446 | { |
447 | int num, port_a; |
448 | char b[32]; |
449 | |
450 | port_a = target_dev_id + 1; |
451 | /* T10 vendor identifier field format (faked) */ |
452 | arr[0] = 0x2; /* ASCII */ |
453 | arr[1] = 0x1; |
454 | arr[2] = 0x0; |
455 | memcpy(&arr[4], inq_vendor_id, 8); |
456 | memcpy(&arr[12], inq_product_id, 16); |
457 | memcpy(&arr[28], dev_id_str, dev_id_str_len); |
458 | num = 8 + 16 + dev_id_str_len; |
459 | arr[3] = num; |
460 | num += 4; |
461 | if (dev_id_num >= 0) { |
462 | /* NAA-5, Logical unit identifier (binary) */ |
463 | arr[num++] = 0x1; /* binary (not necessarily sas) */ |
464 | arr[num++] = 0x3; /* PIV=0, lu, naa */ |
465 | arr[num++] = 0x0; |
466 | arr[num++] = 0x8; |
467 | arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */ |
468 | arr[num++] = 0x33; |
469 | arr[num++] = 0x33; |
470 | arr[num++] = 0x30; |
471 | arr[num++] = (dev_id_num >> 24); |
472 | arr[num++] = (dev_id_num >> 16) & 0xff; |
473 | arr[num++] = (dev_id_num >> 8) & 0xff; |
474 | arr[num++] = dev_id_num & 0xff; |
475 | /* Target relative port number */ |
476 | arr[num++] = 0x61; /* proto=sas, binary */ |
477 | arr[num++] = 0x94; /* PIV=1, target port, rel port */ |
478 | arr[num++] = 0x0; /* reserved */ |
479 | arr[num++] = 0x4; /* length */ |
480 | arr[num++] = 0x0; /* reserved */ |
481 | arr[num++] = 0x0; /* reserved */ |
482 | arr[num++] = 0x0; |
483 | arr[num++] = 0x1; /* relative port A */ |
484 | } |
485 | /* NAA-5, Target port identifier */ |
486 | arr[num++] = 0x61; /* proto=sas, binary */ |
487 | arr[num++] = 0x93; /* piv=1, target port, naa */ |
488 | arr[num++] = 0x0; |
489 | arr[num++] = 0x8; |
490 | arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */ |
491 | arr[num++] = 0x22; |
492 | arr[num++] = 0x22; |
493 | arr[num++] = 0x20; |
494 | arr[num++] = (port_a >> 24); |
495 | arr[num++] = (port_a >> 16) & 0xff; |
496 | arr[num++] = (port_a >> 8) & 0xff; |
497 | arr[num++] = port_a & 0xff; |
498 | /* NAA-5, Target port group identifier */ |
499 | arr[num++] = 0x61; /* proto=sas, binary */ |
500 | arr[num++] = 0x95; /* piv=1, target port group id */ |
501 | arr[num++] = 0x0; |
502 | arr[num++] = 0x4; |
503 | arr[num++] = 0; |
504 | arr[num++] = 0; |
505 | arr[num++] = (port_group_id >> 8) & 0xff; |
506 | arr[num++] = port_group_id & 0xff; |
507 | /* NAA-5, Target device identifier */ |
508 | arr[num++] = 0x61; /* proto=sas, binary */ |
509 | arr[num++] = 0xa3; /* piv=1, target device, naa */ |
510 | arr[num++] = 0x0; |
511 | arr[num++] = 0x8; |
512 | arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */ |
513 | arr[num++] = 0x22; |
514 | arr[num++] = 0x22; |
515 | arr[num++] = 0x20; |
516 | arr[num++] = (target_dev_id >> 24); |
517 | arr[num++] = (target_dev_id >> 16) & 0xff; |
518 | arr[num++] = (target_dev_id >> 8) & 0xff; |
519 | arr[num++] = target_dev_id & 0xff; |
520 | /* SCSI name string: Target device identifier */ |
521 | arr[num++] = 0x63; /* proto=sas, UTF-8 */ |
522 | arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */ |
523 | arr[num++] = 0x0; |
524 | arr[num++] = 24; |
525 | memcpy(arr + num, "naa.52222220", 12); |
526 | num += 12; |
527 | snprintf(b, sizeof(b), "%08X", target_dev_id); |
528 | memcpy(arr + num, b, 8); |
529 | num += 8; |
530 | memset(arr + num, 0, 4); |
531 | num += 4; |
532 | return num; |
533 | } |
534 | |
535 | |
536 | static unsigned char vpd84_data[] = { |
537 | /* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0, |
538 | 0x22,0x22,0x22,0x0,0xbb,0x1, |
539 | 0x22,0x22,0x22,0x0,0xbb,0x2, |
540 | }; |
541 | |
542 | static int inquiry_evpd_84(unsigned char * arr) |
543 | { |
544 | memcpy(arr, vpd84_data, sizeof(vpd84_data)); |
545 | return sizeof(vpd84_data); |
546 | } |
547 | |
548 | static int inquiry_evpd_85(unsigned char * arr) |
549 | { |
550 | int num = 0; |
551 | const char * na1 = "https://www.kernel.org/config"; |
552 | const char * na2 = "http://www.kernel.org/log"; |
553 | int plen, olen; |
554 | |
555 | arr[num++] = 0x1; /* lu, storage config */ |
556 | arr[num++] = 0x0; /* reserved */ |
557 | arr[num++] = 0x0; |
558 | olen = strlen(na1); |
559 | plen = olen + 1; |
560 | if (plen % 4) |
561 | plen = ((plen / 4) + 1) * 4; |
562 | arr[num++] = plen; /* length, null termianted, padded */ |
563 | memcpy(arr + num, na1, olen); |
564 | memset(arr + num + olen, 0, plen - olen); |
565 | num += plen; |
566 | |
567 | arr[num++] = 0x4; /* lu, logging */ |
568 | arr[num++] = 0x0; /* reserved */ |
569 | arr[num++] = 0x0; |
570 | olen = strlen(na2); |
571 | plen = olen + 1; |
572 | if (plen % 4) |
573 | plen = ((plen / 4) + 1) * 4; |
574 | arr[num++] = plen; /* length, null terminated, padded */ |
575 | memcpy(arr + num, na2, olen); |
576 | memset(arr + num + olen, 0, plen - olen); |
577 | num += plen; |
578 | |
579 | return num; |
580 | } |
581 | |
582 | /* SCSI ports VPD page */ |
583 | static int inquiry_evpd_88(unsigned char * arr, int target_dev_id) |
584 | { |
585 | int num = 0; |
586 | int port_a, port_b; |
587 | |
588 | port_a = target_dev_id + 1; |
589 | port_b = port_a + 1; |
590 | arr[num++] = 0x0; /* reserved */ |
591 | arr[num++] = 0x0; /* reserved */ |
592 | arr[num++] = 0x0; |
593 | arr[num++] = 0x1; /* relative port 1 (primary) */ |
594 | memset(arr + num, 0, 6); |
595 | num += 6; |
596 | arr[num++] = 0x0; |
597 | arr[num++] = 12; /* length tp descriptor */ |
598 | /* naa-5 target port identifier (A) */ |
599 | arr[num++] = 0x61; /* proto=sas, binary */ |
600 | arr[num++] = 0x93; /* PIV=1, target port, NAA */ |
601 | arr[num++] = 0x0; /* reserved */ |
602 | arr[num++] = 0x8; /* length */ |
603 | arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */ |
604 | arr[num++] = 0x22; |
605 | arr[num++] = 0x22; |
606 | arr[num++] = 0x20; |
607 | arr[num++] = (port_a >> 24); |
608 | arr[num++] = (port_a >> 16) & 0xff; |
609 | arr[num++] = (port_a >> 8) & 0xff; |
610 | arr[num++] = port_a & 0xff; |
611 | |
612 | arr[num++] = 0x0; /* reserved */ |
613 | arr[num++] = 0x0; /* reserved */ |
614 | arr[num++] = 0x0; |
615 | arr[num++] = 0x2; /* relative port 2 (secondary) */ |
616 | memset(arr + num, 0, 6); |
617 | num += 6; |
618 | arr[num++] = 0x0; |
619 | arr[num++] = 12; /* length tp descriptor */ |
620 | /* naa-5 target port identifier (B) */ |
621 | arr[num++] = 0x61; /* proto=sas, binary */ |
622 | arr[num++] = 0x93; /* PIV=1, target port, NAA */ |
623 | arr[num++] = 0x0; /* reserved */ |
624 | arr[num++] = 0x8; /* length */ |
625 | arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */ |
626 | arr[num++] = 0x22; |
627 | arr[num++] = 0x22; |
628 | arr[num++] = 0x20; |
629 | arr[num++] = (port_b >> 24); |
630 | arr[num++] = (port_b >> 16) & 0xff; |
631 | arr[num++] = (port_b >> 8) & 0xff; |
632 | arr[num++] = port_b & 0xff; |
633 | |
634 | return num; |
635 | } |
636 | |
637 | |
638 | static unsigned char vpd89_data[] = { |
639 | /* from 4th byte */ 0,0,0,0, |
640 | 'l','i','n','u','x',' ',' ',' ', |
641 | 'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ', |
642 | '1','2','3','4', |
643 | 0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0, |
644 | 0xec,0,0,0, |
645 | 0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0, |
646 | 0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20, |
647 | 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33, |
648 | 0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31, |
649 | 0x53,0x41, |
650 | 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, |
651 | 0x20,0x20, |
652 | 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, |
653 | 0x10,0x80, |
654 | 0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0, |
655 | 0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0, |
656 | 0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0, |
657 | 0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0, |
658 | 0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40, |
659 | 0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0, |
660 | 0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0, |
661 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
662 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
663 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
664 | 0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42, |
665 | 0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8, |
666 | 0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe, |
667 | 0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0, |
668 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
669 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
670 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
671 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
672 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
673 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
674 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
675 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
676 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
677 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
678 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
679 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51, |
680 | }; |
681 | |
682 | static int inquiry_evpd_89(unsigned char * arr) |
683 | { |
684 | memcpy(arr, vpd89_data, sizeof(vpd89_data)); |
685 | return sizeof(vpd89_data); |
686 | } |
687 | |
688 | |
689 | /* Block limits VPD page (SBC-3) */ |
690 | static unsigned char vpdb0_data[] = { |
691 | /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64, |
692 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
693 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
694 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
695 | }; |
696 | |
697 | static int inquiry_evpd_b0(unsigned char * arr) |
698 | { |
699 | unsigned int gran; |
700 | |
701 | memcpy(arr, vpdb0_data, sizeof(vpdb0_data)); |
702 | gran = 1 << scsi_debug_physblk_exp; |
703 | arr[2] = (gran >> 8) & 0xff; |
704 | arr[3] = gran & 0xff; |
705 | if (sdebug_store_sectors > 0x400) { |
706 | arr[4] = (sdebug_store_sectors >> 24) & 0xff; |
707 | arr[5] = (sdebug_store_sectors >> 16) & 0xff; |
708 | arr[6] = (sdebug_store_sectors >> 8) & 0xff; |
709 | arr[7] = sdebug_store_sectors & 0xff; |
710 | } |
711 | |
712 | if (scsi_debug_unmap_max_desc) { |
713 | unsigned int blocks; |
714 | |
715 | if (scsi_debug_unmap_max_blocks) |
716 | blocks = scsi_debug_unmap_max_blocks; |
717 | else |
718 | blocks = 0xffffffff; |
719 | |
720 | put_unaligned_be32(blocks, &arr[16]); |
721 | put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]); |
722 | } |
723 | |
724 | if (scsi_debug_unmap_alignment) { |
725 | put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]); |
726 | arr[28] |= 0x80; /* UGAVALID */ |
727 | } |
728 | |
729 | if (scsi_debug_unmap_granularity) { |
730 | put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]); |
731 | return 0x3c; /* Mandatory page length for thin provisioning */ |
732 | } |
733 | |
734 | return sizeof(vpdb0_data); |
735 | } |
736 | |
737 | /* Block device characteristics VPD page (SBC-3) */ |
738 | static int inquiry_evpd_b1(unsigned char *arr) |
739 | { |
740 | memset(arr, 0, 0x3c); |
741 | arr[0] = 0; |
742 | arr[1] = 1; /* non rotating medium (e.g. solid state) */ |
743 | arr[2] = 0; |
744 | arr[3] = 5; /* less than 1.8" */ |
745 | |
746 | return 0x3c; |
747 | } |
748 | |
749 | #define SDEBUG_LONG_INQ_SZ 96 |
750 | #define SDEBUG_MAX_INQ_ARR_SZ 584 |
751 | |
752 | static int resp_inquiry(struct scsi_cmnd * scp, int target, |
753 | struct sdebug_dev_info * devip) |
754 | { |
755 | unsigned char pq_pdt; |
756 | unsigned char * arr; |
757 | unsigned char *cmd = (unsigned char *)scp->cmnd; |
758 | int alloc_len, n, ret; |
759 | |
760 | alloc_len = (cmd[3] << 8) + cmd[4]; |
761 | arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC); |
762 | if (! arr) |
763 | return DID_REQUEUE << 16; |
764 | if (devip->wlun) |
765 | pq_pdt = 0x1e; /* present, wlun */ |
766 | else if (scsi_debug_no_lun_0 && (0 == devip->lun)) |
767 | pq_pdt = 0x7f; /* not present, no device type */ |
768 | else |
769 | pq_pdt = (scsi_debug_ptype & 0x1f); |
770 | arr[0] = pq_pdt; |
771 | if (0x2 & cmd[1]) { /* CMDDT bit set */ |
772 | mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, |
773 | 0); |
774 | kfree(arr); |
775 | return check_condition_result; |
776 | } else if (0x1 & cmd[1]) { /* EVPD bit set */ |
777 | int lu_id_num, port_group_id, target_dev_id, len; |
778 | char lu_id_str[6]; |
779 | int host_no = devip->sdbg_host->shost->host_no; |
780 | |
781 | port_group_id = (((host_no + 1) & 0x7f) << 8) + |
782 | (devip->channel & 0x7f); |
783 | if (0 == scsi_debug_vpd_use_hostno) |
784 | host_no = 0; |
785 | lu_id_num = devip->wlun ? -1 : (((host_no + 1) * 2000) + |
786 | (devip->target * 1000) + devip->lun); |
787 | target_dev_id = ((host_no + 1) * 2000) + |
788 | (devip->target * 1000) - 3; |
789 | len = scnprintf(lu_id_str, 6, "%d", lu_id_num); |
790 | if (0 == cmd[2]) { /* supported vital product data pages */ |
791 | arr[1] = cmd[2]; /*sanity */ |
792 | n = 4; |
793 | arr[n++] = 0x0; /* this page */ |
794 | arr[n++] = 0x80; /* unit serial number */ |
795 | arr[n++] = 0x83; /* device identification */ |
796 | arr[n++] = 0x84; /* software interface ident. */ |
797 | arr[n++] = 0x85; /* management network addresses */ |
798 | arr[n++] = 0x86; /* extended inquiry */ |
799 | arr[n++] = 0x87; /* mode page policy */ |
800 | arr[n++] = 0x88; /* SCSI ports */ |
801 | arr[n++] = 0x89; /* ATA information */ |
802 | arr[n++] = 0xb0; /* Block limits (SBC) */ |
803 | arr[n++] = 0xb1; /* Block characteristics (SBC) */ |
804 | arr[3] = n - 4; /* number of supported VPD pages */ |
805 | } else if (0x80 == cmd[2]) { /* unit serial number */ |
806 | arr[1] = cmd[2]; /*sanity */ |
807 | arr[3] = len; |
808 | memcpy(&arr[4], lu_id_str, len); |
809 | } else if (0x83 == cmd[2]) { /* device identification */ |
810 | arr[1] = cmd[2]; /*sanity */ |
811 | arr[3] = inquiry_evpd_83(&arr[4], port_group_id, |
812 | target_dev_id, lu_id_num, |
813 | lu_id_str, len); |
814 | } else if (0x84 == cmd[2]) { /* Software interface ident. */ |
815 | arr[1] = cmd[2]; /*sanity */ |
816 | arr[3] = inquiry_evpd_84(&arr[4]); |
817 | } else if (0x85 == cmd[2]) { /* Management network addresses */ |
818 | arr[1] = cmd[2]; /*sanity */ |
819 | arr[3] = inquiry_evpd_85(&arr[4]); |
820 | } else if (0x86 == cmd[2]) { /* extended inquiry */ |
821 | arr[1] = cmd[2]; /*sanity */ |
822 | arr[3] = 0x3c; /* number of following entries */ |
823 | if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) |
824 | arr[4] = 0x4; /* SPT: GRD_CHK:1 */ |
825 | else if (scsi_debug_dif) |
826 | arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */ |
827 | else |
828 | arr[4] = 0x0; /* no protection stuff */ |
829 | arr[5] = 0x7; /* head of q, ordered + simple q's */ |
830 | } else if (0x87 == cmd[2]) { /* mode page policy */ |
831 | arr[1] = cmd[2]; /*sanity */ |
832 | arr[3] = 0x8; /* number of following entries */ |
833 | arr[4] = 0x2; /* disconnect-reconnect mp */ |
834 | arr[6] = 0x80; /* mlus, shared */ |
835 | arr[8] = 0x18; /* protocol specific lu */ |
836 | arr[10] = 0x82; /* mlus, per initiator port */ |
837 | } else if (0x88 == cmd[2]) { /* SCSI Ports */ |
838 | arr[1] = cmd[2]; /*sanity */ |
839 | arr[3] = inquiry_evpd_88(&arr[4], target_dev_id); |
840 | } else if (0x89 == cmd[2]) { /* ATA information */ |
841 | arr[1] = cmd[2]; /*sanity */ |
842 | n = inquiry_evpd_89(&arr[4]); |
843 | arr[2] = (n >> 8); |
844 | arr[3] = (n & 0xff); |
845 | } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */ |
846 | arr[1] = cmd[2]; /*sanity */ |
847 | arr[3] = inquiry_evpd_b0(&arr[4]); |
848 | } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */ |
849 | arr[1] = cmd[2]; /*sanity */ |
850 | arr[3] = inquiry_evpd_b1(&arr[4]); |
851 | } else { |
852 | /* Illegal request, invalid field in cdb */ |
853 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
854 | INVALID_FIELD_IN_CDB, 0); |
855 | kfree(arr); |
856 | return check_condition_result; |
857 | } |
858 | len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len); |
859 | ret = fill_from_dev_buffer(scp, arr, |
860 | min(len, SDEBUG_MAX_INQ_ARR_SZ)); |
861 | kfree(arr); |
862 | return ret; |
863 | } |
864 | /* drops through here for a standard inquiry */ |
865 | arr[1] = DEV_REMOVEABLE(target) ? 0x80 : 0; /* Removable disk */ |
866 | arr[2] = scsi_debug_scsi_level; |
867 | arr[3] = 2; /* response_data_format==2 */ |
868 | arr[4] = SDEBUG_LONG_INQ_SZ - 5; |
869 | arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */ |
870 | if (0 == scsi_debug_vpd_use_hostno) |
871 | arr[5] = 0x10; /* claim: implicit TGPS */ |
872 | arr[6] = 0x10; /* claim: MultiP */ |
873 | /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */ |
874 | arr[7] = 0xa; /* claim: LINKED + CMDQUE */ |
875 | memcpy(&arr[8], inq_vendor_id, 8); |
876 | memcpy(&arr[16], inq_product_id, 16); |
877 | memcpy(&arr[32], inq_product_rev, 4); |
878 | /* version descriptors (2 bytes each) follow */ |
879 | arr[58] = 0x0; arr[59] = 0x77; /* SAM-3 ANSI */ |
880 | arr[60] = 0x3; arr[61] = 0x14; /* SPC-3 ANSI */ |
881 | n = 62; |
882 | if (scsi_debug_ptype == 0) { |
883 | arr[n++] = 0x3; arr[n++] = 0x3d; /* SBC-2 ANSI */ |
884 | } else if (scsi_debug_ptype == 1) { |
885 | arr[n++] = 0x3; arr[n++] = 0x60; /* SSC-2 no version */ |
886 | } |
887 | arr[n++] = 0xc; arr[n++] = 0xf; /* SAS-1.1 rev 10 */ |
888 | ret = fill_from_dev_buffer(scp, arr, |
889 | min(alloc_len, SDEBUG_LONG_INQ_SZ)); |
890 | kfree(arr); |
891 | return ret; |
892 | } |
893 | |
894 | static int resp_requests(struct scsi_cmnd * scp, |
895 | struct sdebug_dev_info * devip) |
896 | { |
897 | unsigned char * sbuff; |
898 | unsigned char *cmd = (unsigned char *)scp->cmnd; |
899 | unsigned char arr[SDEBUG_SENSE_LEN]; |
900 | int want_dsense; |
901 | int len = 18; |
902 | |
903 | memset(arr, 0, sizeof(arr)); |
904 | if (devip->reset == 1) |
905 | mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0); |
906 | want_dsense = !!(cmd[1] & 1) || scsi_debug_dsense; |
907 | sbuff = devip->sense_buff; |
908 | if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) { |
909 | if (want_dsense) { |
910 | arr[0] = 0x72; |
911 | arr[1] = 0x0; /* NO_SENSE in sense_key */ |
912 | arr[2] = THRESHOLD_EXCEEDED; |
913 | arr[3] = 0xff; /* TEST set and MRIE==6 */ |
914 | } else { |
915 | arr[0] = 0x70; |
916 | arr[2] = 0x0; /* NO_SENSE in sense_key */ |
917 | arr[7] = 0xa; /* 18 byte sense buffer */ |
918 | arr[12] = THRESHOLD_EXCEEDED; |
919 | arr[13] = 0xff; /* TEST set and MRIE==6 */ |
920 | } |
921 | } else { |
922 | memcpy(arr, sbuff, SDEBUG_SENSE_LEN); |
923 | if ((cmd[1] & 1) && (! scsi_debug_dsense)) { |
924 | /* DESC bit set and sense_buff in fixed format */ |
925 | memset(arr, 0, sizeof(arr)); |
926 | arr[0] = 0x72; |
927 | arr[1] = sbuff[2]; /* sense key */ |
928 | arr[2] = sbuff[12]; /* asc */ |
929 | arr[3] = sbuff[13]; /* ascq */ |
930 | len = 8; |
931 | } |
932 | } |
933 | mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0); |
934 | return fill_from_dev_buffer(scp, arr, len); |
935 | } |
936 | |
937 | static int resp_start_stop(struct scsi_cmnd * scp, |
938 | struct sdebug_dev_info * devip) |
939 | { |
940 | unsigned char *cmd = (unsigned char *)scp->cmnd; |
941 | int power_cond, errsts, start; |
942 | |
943 | if ((errsts = check_readiness(scp, 1, devip))) |
944 | return errsts; |
945 | power_cond = (cmd[4] & 0xf0) >> 4; |
946 | if (power_cond) { |
947 | mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, |
948 | 0); |
949 | return check_condition_result; |
950 | } |
951 | start = cmd[4] & 1; |
952 | if (start == devip->stopped) |
953 | devip->stopped = !start; |
954 | return 0; |
955 | } |
956 | |
957 | static sector_t get_sdebug_capacity(void) |
958 | { |
959 | if (scsi_debug_virtual_gb > 0) |
960 | return 2048 * 1024 * (sector_t)scsi_debug_virtual_gb; |
961 | else |
962 | return sdebug_store_sectors; |
963 | } |
964 | |
965 | #define SDEBUG_READCAP_ARR_SZ 8 |
966 | static int resp_readcap(struct scsi_cmnd * scp, |
967 | struct sdebug_dev_info * devip) |
968 | { |
969 | unsigned char arr[SDEBUG_READCAP_ARR_SZ]; |
970 | unsigned int capac; |
971 | int errsts; |
972 | |
973 | if ((errsts = check_readiness(scp, 1, devip))) |
974 | return errsts; |
975 | /* following just in case virtual_gb changed */ |
976 | sdebug_capacity = get_sdebug_capacity(); |
977 | memset(arr, 0, SDEBUG_READCAP_ARR_SZ); |
978 | if (sdebug_capacity < 0xffffffff) { |
979 | capac = (unsigned int)sdebug_capacity - 1; |
980 | arr[0] = (capac >> 24); |
981 | arr[1] = (capac >> 16) & 0xff; |
982 | arr[2] = (capac >> 8) & 0xff; |
983 | arr[3] = capac & 0xff; |
984 | } else { |
985 | arr[0] = 0xff; |
986 | arr[1] = 0xff; |
987 | arr[2] = 0xff; |
988 | arr[3] = 0xff; |
989 | } |
990 | arr[6] = (scsi_debug_sector_size >> 8) & 0xff; |
991 | arr[7] = scsi_debug_sector_size & 0xff; |
992 | return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ); |
993 | } |
994 | |
995 | #define SDEBUG_READCAP16_ARR_SZ 32 |
996 | static int resp_readcap16(struct scsi_cmnd * scp, |
997 | struct sdebug_dev_info * devip) |
998 | { |
999 | unsigned char *cmd = (unsigned char *)scp->cmnd; |
1000 | unsigned char arr[SDEBUG_READCAP16_ARR_SZ]; |
1001 | unsigned long long capac; |
1002 | int errsts, k, alloc_len; |
1003 | |
1004 | if ((errsts = check_readiness(scp, 1, devip))) |
1005 | return errsts; |
1006 | alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8) |
1007 | + cmd[13]); |
1008 | /* following just in case virtual_gb changed */ |
1009 | sdebug_capacity = get_sdebug_capacity(); |
1010 | memset(arr, 0, SDEBUG_READCAP16_ARR_SZ); |
1011 | capac = sdebug_capacity - 1; |
1012 | for (k = 0; k < 8; ++k, capac >>= 8) |
1013 | arr[7 - k] = capac & 0xff; |
1014 | arr[8] = (scsi_debug_sector_size >> 24) & 0xff; |
1015 | arr[9] = (scsi_debug_sector_size >> 16) & 0xff; |
1016 | arr[10] = (scsi_debug_sector_size >> 8) & 0xff; |
1017 | arr[11] = scsi_debug_sector_size & 0xff; |
1018 | arr[13] = scsi_debug_physblk_exp & 0xf; |
1019 | arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f; |
1020 | |
1021 | if (scsi_debug_unmap_granularity) |
1022 | arr[14] |= 0x80; /* TPE */ |
1023 | |
1024 | arr[15] = scsi_debug_lowest_aligned & 0xff; |
1025 | |
1026 | if (scsi_debug_dif) { |
1027 | arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */ |
1028 | arr[12] |= 1; /* PROT_EN */ |
1029 | } |
1030 | |
1031 | return fill_from_dev_buffer(scp, arr, |
1032 | min(alloc_len, SDEBUG_READCAP16_ARR_SZ)); |
1033 | } |
1034 | |
1035 | #define SDEBUG_MAX_TGTPGS_ARR_SZ 1412 |
1036 | |
1037 | static int resp_report_tgtpgs(struct scsi_cmnd * scp, |
1038 | struct sdebug_dev_info * devip) |
1039 | { |
1040 | unsigned char *cmd = (unsigned char *)scp->cmnd; |
1041 | unsigned char * arr; |
1042 | int host_no = devip->sdbg_host->shost->host_no; |
1043 | int n, ret, alen, rlen; |
1044 | int port_group_a, port_group_b, port_a, port_b; |
1045 | |
1046 | alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8) |
1047 | + cmd[9]); |
1048 | |
1049 | arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC); |
1050 | if (! arr) |
1051 | return DID_REQUEUE << 16; |
1052 | /* |
1053 | * EVPD page 0x88 states we have two ports, one |
1054 | * real and a fake port with no device connected. |
1055 | * So we create two port groups with one port each |
1056 | * and set the group with port B to unavailable. |
1057 | */ |
1058 | port_a = 0x1; /* relative port A */ |
1059 | port_b = 0x2; /* relative port B */ |
1060 | port_group_a = (((host_no + 1) & 0x7f) << 8) + |
1061 | (devip->channel & 0x7f); |
1062 | port_group_b = (((host_no + 1) & 0x7f) << 8) + |
1063 | (devip->channel & 0x7f) + 0x80; |
1064 | |
1065 | /* |
1066 | * The asymmetric access state is cycled according to the host_id. |
1067 | */ |
1068 | n = 4; |
1069 | if (0 == scsi_debug_vpd_use_hostno) { |
1070 | arr[n++] = host_no % 3; /* Asymm access state */ |
1071 | arr[n++] = 0x0F; /* claim: all states are supported */ |
1072 | } else { |
1073 | arr[n++] = 0x0; /* Active/Optimized path */ |
1074 | arr[n++] = 0x01; /* claim: only support active/optimized paths */ |
1075 | } |
1076 | arr[n++] = (port_group_a >> 8) & 0xff; |
1077 | arr[n++] = port_group_a & 0xff; |
1078 | arr[n++] = 0; /* Reserved */ |
1079 | arr[n++] = 0; /* Status code */ |
1080 | arr[n++] = 0; /* Vendor unique */ |
1081 | arr[n++] = 0x1; /* One port per group */ |
1082 | arr[n++] = 0; /* Reserved */ |
1083 | arr[n++] = 0; /* Reserved */ |
1084 | arr[n++] = (port_a >> 8) & 0xff; |
1085 | arr[n++] = port_a & 0xff; |
1086 | arr[n++] = 3; /* Port unavailable */ |
1087 | arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */ |
1088 | arr[n++] = (port_group_b >> 8) & 0xff; |
1089 | arr[n++] = port_group_b & 0xff; |
1090 | arr[n++] = 0; /* Reserved */ |
1091 | arr[n++] = 0; /* Status code */ |
1092 | arr[n++] = 0; /* Vendor unique */ |
1093 | arr[n++] = 0x1; /* One port per group */ |
1094 | arr[n++] = 0; /* Reserved */ |
1095 | arr[n++] = 0; /* Reserved */ |
1096 | arr[n++] = (port_b >> 8) & 0xff; |
1097 | arr[n++] = port_b & 0xff; |
1098 | |
1099 | rlen = n - 4; |
1100 | arr[0] = (rlen >> 24) & 0xff; |
1101 | arr[1] = (rlen >> 16) & 0xff; |
1102 | arr[2] = (rlen >> 8) & 0xff; |
1103 | arr[3] = rlen & 0xff; |
1104 | |
1105 | /* |
1106 | * Return the smallest value of either |
1107 | * - The allocated length |
1108 | * - The constructed command length |
1109 | * - The maximum array size |
1110 | */ |
1111 | rlen = min(alen,n); |
1112 | ret = fill_from_dev_buffer(scp, arr, |
1113 | min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ)); |
1114 | kfree(arr); |
1115 | return ret; |
1116 | } |
1117 | |
1118 | /* <<Following mode page info copied from ST318451LW>> */ |
1119 | |
1120 | static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target) |
1121 | { /* Read-Write Error Recovery page for mode_sense */ |
1122 | unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0, |
1123 | 5, 0, 0xff, 0xff}; |
1124 | |
1125 | memcpy(p, err_recov_pg, sizeof(err_recov_pg)); |
1126 | if (1 == pcontrol) |
1127 | memset(p + 2, 0, sizeof(err_recov_pg) - 2); |
1128 | return sizeof(err_recov_pg); |
1129 | } |
1130 | |
1131 | static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target) |
1132 | { /* Disconnect-Reconnect page for mode_sense */ |
1133 | unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0, |
1134 | 0, 0, 0, 0, 0, 0, 0, 0}; |
1135 | |
1136 | memcpy(p, disconnect_pg, sizeof(disconnect_pg)); |
1137 | if (1 == pcontrol) |
1138 | memset(p + 2, 0, sizeof(disconnect_pg) - 2); |
1139 | return sizeof(disconnect_pg); |
1140 | } |
1141 | |
1142 | static int resp_format_pg(unsigned char * p, int pcontrol, int target) |
1143 | { /* Format device page for mode_sense */ |
1144 | unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0, |
1145 | 0, 0, 0, 0, 0, 0, 0, 0, |
1146 | 0, 0, 0, 0, 0x40, 0, 0, 0}; |
1147 | |
1148 | memcpy(p, format_pg, sizeof(format_pg)); |
1149 | p[10] = (sdebug_sectors_per >> 8) & 0xff; |
1150 | p[11] = sdebug_sectors_per & 0xff; |
1151 | p[12] = (scsi_debug_sector_size >> 8) & 0xff; |
1152 | p[13] = scsi_debug_sector_size & 0xff; |
1153 | if (DEV_REMOVEABLE(target)) |
1154 | p[20] |= 0x20; /* should agree with INQUIRY */ |
1155 | if (1 == pcontrol) |
1156 | memset(p + 2, 0, sizeof(format_pg) - 2); |
1157 | return sizeof(format_pg); |
1158 | } |
1159 | |
1160 | static int resp_caching_pg(unsigned char * p, int pcontrol, int target) |
1161 | { /* Caching page for mode_sense */ |
1162 | unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, |
1163 | 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0}; |
1164 | |
1165 | memcpy(p, caching_pg, sizeof(caching_pg)); |
1166 | if (1 == pcontrol) |
1167 | memset(p + 2, 0, sizeof(caching_pg) - 2); |
1168 | return sizeof(caching_pg); |
1169 | } |
1170 | |
1171 | static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target) |
1172 | { /* Control mode page for mode_sense */ |
1173 | unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0, |
1174 | 0, 0, 0, 0}; |
1175 | unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, |
1176 | 0, 0, 0x2, 0x4b}; |
1177 | |
1178 | if (scsi_debug_dsense) |
1179 | ctrl_m_pg[2] |= 0x4; |
1180 | else |
1181 | ctrl_m_pg[2] &= ~0x4; |
1182 | |
1183 | if (scsi_debug_ato) |
1184 | ctrl_m_pg[5] |= 0x80; /* ATO=1 */ |
1185 | |
1186 | memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg)); |
1187 | if (1 == pcontrol) |
1188 | memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg)); |
1189 | else if (2 == pcontrol) |
1190 | memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg)); |
1191 | return sizeof(ctrl_m_pg); |
1192 | } |
1193 | |
1194 | |
1195 | static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target) |
1196 | { /* Informational Exceptions control mode page for mode_sense */ |
1197 | unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0, |
1198 | 0, 0, 0x0, 0x0}; |
1199 | unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, |
1200 | 0, 0, 0x0, 0x0}; |
1201 | |
1202 | memcpy(p, iec_m_pg, sizeof(iec_m_pg)); |
1203 | if (1 == pcontrol) |
1204 | memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg)); |
1205 | else if (2 == pcontrol) |
1206 | memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg)); |
1207 | return sizeof(iec_m_pg); |
1208 | } |
1209 | |
1210 | static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target) |
1211 | { /* SAS SSP mode page - short format for mode_sense */ |
1212 | unsigned char sas_sf_m_pg[] = {0x19, 0x6, |
1213 | 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0}; |
1214 | |
1215 | memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg)); |
1216 | if (1 == pcontrol) |
1217 | memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2); |
1218 | return sizeof(sas_sf_m_pg); |
1219 | } |
1220 | |
1221 | |
1222 | static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target, |
1223 | int target_dev_id) |
1224 | { /* SAS phy control and discover mode page for mode_sense */ |
1225 | unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2, |
1226 | 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0, |
1227 | 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0, |
1228 | 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1, |
1229 | 0x2, 0, 0, 0, 0, 0, 0, 0, |
1230 | 0x88, 0x99, 0, 0, 0, 0, 0, 0, |
1231 | 0, 0, 0, 0, 0, 0, 0, 0, |
1232 | 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0, |
1233 | 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0, |
1234 | 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1, |
1235 | 0x3, 0, 0, 0, 0, 0, 0, 0, |
1236 | 0x88, 0x99, 0, 0, 0, 0, 0, 0, |
1237 | 0, 0, 0, 0, 0, 0, 0, 0, |
1238 | }; |
1239 | int port_a, port_b; |
1240 | |
1241 | port_a = target_dev_id + 1; |
1242 | port_b = port_a + 1; |
1243 | memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg)); |
1244 | p[20] = (port_a >> 24); |
1245 | p[21] = (port_a >> 16) & 0xff; |
1246 | p[22] = (port_a >> 8) & 0xff; |
1247 | p[23] = port_a & 0xff; |
1248 | p[48 + 20] = (port_b >> 24); |
1249 | p[48 + 21] = (port_b >> 16) & 0xff; |
1250 | p[48 + 22] = (port_b >> 8) & 0xff; |
1251 | p[48 + 23] = port_b & 0xff; |
1252 | if (1 == pcontrol) |
1253 | memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4); |
1254 | return sizeof(sas_pcd_m_pg); |
1255 | } |
1256 | |
1257 | static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol) |
1258 | { /* SAS SSP shared protocol specific port mode subpage */ |
1259 | unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0, |
1260 | 0, 0, 0, 0, 0, 0, 0, 0, |
1261 | }; |
1262 | |
1263 | memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg)); |
1264 | if (1 == pcontrol) |
1265 | memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4); |
1266 | return sizeof(sas_sha_m_pg); |
1267 | } |
1268 | |
1269 | #define SDEBUG_MAX_MSENSE_SZ 256 |
1270 | |
1271 | static int resp_mode_sense(struct scsi_cmnd * scp, int target, |
1272 | struct sdebug_dev_info * devip) |
1273 | { |
1274 | unsigned char dbd, llbaa; |
1275 | int pcontrol, pcode, subpcode, bd_len; |
1276 | unsigned char dev_spec; |
1277 | int k, alloc_len, msense_6, offset, len, errsts, target_dev_id; |
1278 | unsigned char * ap; |
1279 | unsigned char arr[SDEBUG_MAX_MSENSE_SZ]; |
1280 | unsigned char *cmd = (unsigned char *)scp->cmnd; |
1281 | |
1282 | if ((errsts = check_readiness(scp, 1, devip))) |
1283 | return errsts; |
1284 | dbd = !!(cmd[1] & 0x8); |
1285 | pcontrol = (cmd[2] & 0xc0) >> 6; |
1286 | pcode = cmd[2] & 0x3f; |
1287 | subpcode = cmd[3]; |
1288 | msense_6 = (MODE_SENSE == cmd[0]); |
1289 | llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10); |
1290 | if ((0 == scsi_debug_ptype) && (0 == dbd)) |
1291 | bd_len = llbaa ? 16 : 8; |
1292 | else |
1293 | bd_len = 0; |
1294 | alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]); |
1295 | memset(arr, 0, SDEBUG_MAX_MSENSE_SZ); |
1296 | if (0x3 == pcontrol) { /* Saving values not supported */ |
1297 | mk_sense_buffer(devip, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, |
1298 | 0); |
1299 | return check_condition_result; |
1300 | } |
1301 | target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) + |
1302 | (devip->target * 1000) - 3; |
1303 | /* set DPOFUA bit for disks */ |
1304 | if (0 == scsi_debug_ptype) |
1305 | dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10; |
1306 | else |
1307 | dev_spec = 0x0; |
1308 | if (msense_6) { |
1309 | arr[2] = dev_spec; |
1310 | arr[3] = bd_len; |
1311 | offset = 4; |
1312 | } else { |
1313 | arr[3] = dev_spec; |
1314 | if (16 == bd_len) |
1315 | arr[4] = 0x1; /* set LONGLBA bit */ |
1316 | arr[7] = bd_len; /* assume 255 or less */ |
1317 | offset = 8; |
1318 | } |
1319 | ap = arr + offset; |
1320 | if ((bd_len > 0) && (!sdebug_capacity)) |
1321 | sdebug_capacity = get_sdebug_capacity(); |
1322 | |
1323 | if (8 == bd_len) { |
1324 | if (sdebug_capacity > 0xfffffffe) { |
1325 | ap[0] = 0xff; |
1326 | ap[1] = 0xff; |
1327 | ap[2] = 0xff; |
1328 | ap[3] = 0xff; |
1329 | } else { |
1330 | ap[0] = (sdebug_capacity >> 24) & 0xff; |
1331 | ap[1] = (sdebug_capacity >> 16) & 0xff; |
1332 | ap[2] = (sdebug_capacity >> 8) & 0xff; |
1333 | ap[3] = sdebug_capacity & 0xff; |
1334 | } |
1335 | ap[6] = (scsi_debug_sector_size >> 8) & 0xff; |
1336 | ap[7] = scsi_debug_sector_size & 0xff; |
1337 | offset += bd_len; |
1338 | ap = arr + offset; |
1339 | } else if (16 == bd_len) { |
1340 | unsigned long long capac = sdebug_capacity; |
1341 | |
1342 | for (k = 0; k < 8; ++k, capac >>= 8) |
1343 | ap[7 - k] = capac & 0xff; |
1344 | ap[12] = (scsi_debug_sector_size >> 24) & 0xff; |
1345 | ap[13] = (scsi_debug_sector_size >> 16) & 0xff; |
1346 | ap[14] = (scsi_debug_sector_size >> 8) & 0xff; |
1347 | ap[15] = scsi_debug_sector_size & 0xff; |
1348 | offset += bd_len; |
1349 | ap = arr + offset; |
1350 | } |
1351 | |
1352 | if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) { |
1353 | /* TODO: Control Extension page */ |
1354 | mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, |
1355 | 0); |
1356 | return check_condition_result; |
1357 | } |
1358 | switch (pcode) { |
1359 | case 0x1: /* Read-Write error recovery page, direct access */ |
1360 | len = resp_err_recov_pg(ap, pcontrol, target); |
1361 | offset += len; |
1362 | break; |
1363 | case 0x2: /* Disconnect-Reconnect page, all devices */ |
1364 | len = resp_disconnect_pg(ap, pcontrol, target); |
1365 | offset += len; |
1366 | break; |
1367 | case 0x3: /* Format device page, direct access */ |
1368 | len = resp_format_pg(ap, pcontrol, target); |
1369 | offset += len; |
1370 | break; |
1371 | case 0x8: /* Caching page, direct access */ |
1372 | len = resp_caching_pg(ap, pcontrol, target); |
1373 | offset += len; |
1374 | break; |
1375 | case 0xa: /* Control Mode page, all devices */ |
1376 | len = resp_ctrl_m_pg(ap, pcontrol, target); |
1377 | offset += len; |
1378 | break; |
1379 | case 0x19: /* if spc==1 then sas phy, control+discover */ |
1380 | if ((subpcode > 0x2) && (subpcode < 0xff)) { |
1381 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
1382 | INVALID_FIELD_IN_CDB, 0); |
1383 | return check_condition_result; |
1384 | } |
1385 | len = 0; |
1386 | if ((0x0 == subpcode) || (0xff == subpcode)) |
1387 | len += resp_sas_sf_m_pg(ap + len, pcontrol, target); |
1388 | if ((0x1 == subpcode) || (0xff == subpcode)) |
1389 | len += resp_sas_pcd_m_spg(ap + len, pcontrol, target, |
1390 | target_dev_id); |
1391 | if ((0x2 == subpcode) || (0xff == subpcode)) |
1392 | len += resp_sas_sha_m_spg(ap + len, pcontrol); |
1393 | offset += len; |
1394 | break; |
1395 | case 0x1c: /* Informational Exceptions Mode page, all devices */ |
1396 | len = resp_iec_m_pg(ap, pcontrol, target); |
1397 | offset += len; |
1398 | break; |
1399 | case 0x3f: /* Read all Mode pages */ |
1400 | if ((0 == subpcode) || (0xff == subpcode)) { |
1401 | len = resp_err_recov_pg(ap, pcontrol, target); |
1402 | len += resp_disconnect_pg(ap + len, pcontrol, target); |
1403 | len += resp_format_pg(ap + len, pcontrol, target); |
1404 | len += resp_caching_pg(ap + len, pcontrol, target); |
1405 | len += resp_ctrl_m_pg(ap + len, pcontrol, target); |
1406 | len += resp_sas_sf_m_pg(ap + len, pcontrol, target); |
1407 | if (0xff == subpcode) { |
1408 | len += resp_sas_pcd_m_spg(ap + len, pcontrol, |
1409 | target, target_dev_id); |
1410 | len += resp_sas_sha_m_spg(ap + len, pcontrol); |
1411 | } |
1412 | len += resp_iec_m_pg(ap + len, pcontrol, target); |
1413 | } else { |
1414 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
1415 | INVALID_FIELD_IN_CDB, 0); |
1416 | return check_condition_result; |
1417 | } |
1418 | offset += len; |
1419 | break; |
1420 | default: |
1421 | mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, |
1422 | 0); |
1423 | return check_condition_result; |
1424 | } |
1425 | if (msense_6) |
1426 | arr[0] = offset - 1; |
1427 | else { |
1428 | arr[0] = ((offset - 2) >> 8) & 0xff; |
1429 | arr[1] = (offset - 2) & 0xff; |
1430 | } |
1431 | return fill_from_dev_buffer(scp, arr, min(alloc_len, offset)); |
1432 | } |
1433 | |
1434 | #define SDEBUG_MAX_MSELECT_SZ 512 |
1435 | |
1436 | static int resp_mode_select(struct scsi_cmnd * scp, int mselect6, |
1437 | struct sdebug_dev_info * devip) |
1438 | { |
1439 | int pf, sp, ps, md_len, bd_len, off, spf, pg_len; |
1440 | int param_len, res, errsts, mpage; |
1441 | unsigned char arr[SDEBUG_MAX_MSELECT_SZ]; |
1442 | unsigned char *cmd = (unsigned char *)scp->cmnd; |
1443 | |
1444 | if ((errsts = check_readiness(scp, 1, devip))) |
1445 | return errsts; |
1446 | memset(arr, 0, sizeof(arr)); |
1447 | pf = cmd[1] & 0x10; |
1448 | sp = cmd[1] & 0x1; |
1449 | param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]); |
1450 | if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) { |
1451 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
1452 | INVALID_FIELD_IN_CDB, 0); |
1453 | return check_condition_result; |
1454 | } |
1455 | res = fetch_to_dev_buffer(scp, arr, param_len); |
1456 | if (-1 == res) |
1457 | return (DID_ERROR << 16); |
1458 | else if ((res < param_len) && |
1459 | (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) |
1460 | printk(KERN_INFO "scsi_debug: mode_select: cdb indicated=%d, " |
1461 | " IO sent=%d bytes\n", param_len, res); |
1462 | md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2); |
1463 | bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]); |
1464 | if (md_len > 2) { |
1465 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
1466 | INVALID_FIELD_IN_PARAM_LIST, 0); |
1467 | return check_condition_result; |
1468 | } |
1469 | off = bd_len + (mselect6 ? 4 : 8); |
1470 | mpage = arr[off] & 0x3f; |
1471 | ps = !!(arr[off] & 0x80); |
1472 | if (ps) { |
1473 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
1474 | INVALID_FIELD_IN_PARAM_LIST, 0); |
1475 | return check_condition_result; |
1476 | } |
1477 | spf = !!(arr[off] & 0x40); |
1478 | pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) : |
1479 | (arr[off + 1] + 2); |
1480 | if ((pg_len + off) > param_len) { |
1481 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
1482 | PARAMETER_LIST_LENGTH_ERR, 0); |
1483 | return check_condition_result; |
1484 | } |
1485 | switch (mpage) { |
1486 | case 0xa: /* Control Mode page */ |
1487 | if (ctrl_m_pg[1] == arr[off + 1]) { |
1488 | memcpy(ctrl_m_pg + 2, arr + off + 2, |
1489 | sizeof(ctrl_m_pg) - 2); |
1490 | scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4); |
1491 | return 0; |
1492 | } |
1493 | break; |
1494 | case 0x1c: /* Informational Exceptions Mode page */ |
1495 | if (iec_m_pg[1] == arr[off + 1]) { |
1496 | memcpy(iec_m_pg + 2, arr + off + 2, |
1497 | sizeof(iec_m_pg) - 2); |
1498 | return 0; |
1499 | } |
1500 | break; |
1501 | default: |
1502 | break; |
1503 | } |
1504 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
1505 | INVALID_FIELD_IN_PARAM_LIST, 0); |
1506 | return check_condition_result; |
1507 | } |
1508 | |
1509 | static int resp_temp_l_pg(unsigned char * arr) |
1510 | { |
1511 | unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38, |
1512 | 0x0, 0x1, 0x3, 0x2, 0x0, 65, |
1513 | }; |
1514 | |
1515 | memcpy(arr, temp_l_pg, sizeof(temp_l_pg)); |
1516 | return sizeof(temp_l_pg); |
1517 | } |
1518 | |
1519 | static int resp_ie_l_pg(unsigned char * arr) |
1520 | { |
1521 | unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38, |
1522 | }; |
1523 | |
1524 | memcpy(arr, ie_l_pg, sizeof(ie_l_pg)); |
1525 | if (iec_m_pg[2] & 0x4) { /* TEST bit set */ |
1526 | arr[4] = THRESHOLD_EXCEEDED; |
1527 | arr[5] = 0xff; |
1528 | } |
1529 | return sizeof(ie_l_pg); |
1530 | } |
1531 | |
1532 | #define SDEBUG_MAX_LSENSE_SZ 512 |
1533 | |
1534 | static int resp_log_sense(struct scsi_cmnd * scp, |
1535 | struct sdebug_dev_info * devip) |
1536 | { |
1537 | int ppc, sp, pcontrol, pcode, subpcode, alloc_len, errsts, len, n; |
1538 | unsigned char arr[SDEBUG_MAX_LSENSE_SZ]; |
1539 | unsigned char *cmd = (unsigned char *)scp->cmnd; |
1540 | |
1541 | if ((errsts = check_readiness(scp, 1, devip))) |
1542 | return errsts; |
1543 | memset(arr, 0, sizeof(arr)); |
1544 | ppc = cmd[1] & 0x2; |
1545 | sp = cmd[1] & 0x1; |
1546 | if (ppc || sp) { |
1547 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
1548 | INVALID_FIELD_IN_CDB, 0); |
1549 | return check_condition_result; |
1550 | } |
1551 | pcontrol = (cmd[2] & 0xc0) >> 6; |
1552 | pcode = cmd[2] & 0x3f; |
1553 | subpcode = cmd[3] & 0xff; |
1554 | alloc_len = (cmd[7] << 8) + cmd[8]; |
1555 | arr[0] = pcode; |
1556 | if (0 == subpcode) { |
1557 | switch (pcode) { |
1558 | case 0x0: /* Supported log pages log page */ |
1559 | n = 4; |
1560 | arr[n++] = 0x0; /* this page */ |
1561 | arr[n++] = 0xd; /* Temperature */ |
1562 | arr[n++] = 0x2f; /* Informational exceptions */ |
1563 | arr[3] = n - 4; |
1564 | break; |
1565 | case 0xd: /* Temperature log page */ |
1566 | arr[3] = resp_temp_l_pg(arr + 4); |
1567 | break; |
1568 | case 0x2f: /* Informational exceptions log page */ |
1569 | arr[3] = resp_ie_l_pg(arr + 4); |
1570 | break; |
1571 | default: |
1572 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
1573 | INVALID_FIELD_IN_CDB, 0); |
1574 | return check_condition_result; |
1575 | } |
1576 | } else if (0xff == subpcode) { |
1577 | arr[0] |= 0x40; |
1578 | arr[1] = subpcode; |
1579 | switch (pcode) { |
1580 | case 0x0: /* Supported log pages and subpages log page */ |
1581 | n = 4; |
1582 | arr[n++] = 0x0; |
1583 | arr[n++] = 0x0; /* 0,0 page */ |
1584 | arr[n++] = 0x0; |
1585 | arr[n++] = 0xff; /* this page */ |
1586 | arr[n++] = 0xd; |
1587 | arr[n++] = 0x0; /* Temperature */ |
1588 | arr[n++] = 0x2f; |
1589 | arr[n++] = 0x0; /* Informational exceptions */ |
1590 | arr[3] = n - 4; |
1591 | break; |
1592 | case 0xd: /* Temperature subpages */ |
1593 | n = 4; |
1594 | arr[n++] = 0xd; |
1595 | arr[n++] = 0x0; /* Temperature */ |
1596 | arr[3] = n - 4; |
1597 | break; |
1598 | case 0x2f: /* Informational exceptions subpages */ |
1599 | n = 4; |
1600 | arr[n++] = 0x2f; |
1601 | arr[n++] = 0x0; /* Informational exceptions */ |
1602 | arr[3] = n - 4; |
1603 | break; |
1604 | default: |
1605 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
1606 | INVALID_FIELD_IN_CDB, 0); |
1607 | return check_condition_result; |
1608 | } |
1609 | } else { |
1610 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
1611 | INVALID_FIELD_IN_CDB, 0); |
1612 | return check_condition_result; |
1613 | } |
1614 | len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len); |
1615 | return fill_from_dev_buffer(scp, arr, |
1616 | min(len, SDEBUG_MAX_INQ_ARR_SZ)); |
1617 | } |
1618 | |
1619 | static int check_device_access_params(struct sdebug_dev_info *devi, |
1620 | unsigned long long lba, unsigned int num) |
1621 | { |
1622 | if (lba + num > sdebug_capacity) { |
1623 | mk_sense_buffer(devi, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, 0); |
1624 | return check_condition_result; |
1625 | } |
1626 | /* transfer length excessive (tie in to block limits VPD page) */ |
1627 | if (num > sdebug_store_sectors) { |
1628 | mk_sense_buffer(devi, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); |
1629 | return check_condition_result; |
1630 | } |
1631 | return 0; |
1632 | } |
1633 | |
1634 | static int do_device_access(struct scsi_cmnd *scmd, |
1635 | struct sdebug_dev_info *devi, |
1636 | unsigned long long lba, unsigned int num, int write) |
1637 | { |
1638 | int ret; |
1639 | unsigned int block, rest = 0; |
1640 | int (*func)(struct scsi_cmnd *, unsigned char *, int); |
1641 | |
1642 | func = write ? fetch_to_dev_buffer : fill_from_dev_buffer; |
1643 | |
1644 | block = do_div(lba, sdebug_store_sectors); |
1645 | if (block + num > sdebug_store_sectors) |
1646 | rest = block + num - sdebug_store_sectors; |
1647 | |
1648 | ret = func(scmd, fake_storep + (block * scsi_debug_sector_size), |
1649 | (num - rest) * scsi_debug_sector_size); |
1650 | if (!ret && rest) |
1651 | ret = func(scmd, fake_storep, rest * scsi_debug_sector_size); |
1652 | |
1653 | return ret; |
1654 | } |
1655 | |
1656 | static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec, |
1657 | unsigned int sectors, u32 ei_lba) |
1658 | { |
1659 | unsigned int i, resid; |
1660 | struct scatterlist *psgl; |
1661 | struct sd_dif_tuple *sdt; |
1662 | sector_t sector; |
1663 | sector_t tmp_sec = start_sec; |
1664 | void *paddr; |
1665 | |
1666 | start_sec = do_div(tmp_sec, sdebug_store_sectors); |
1667 | |
1668 | sdt = (struct sd_dif_tuple *)(dif_storep + dif_offset(start_sec)); |
1669 | |
1670 | for (i = 0 ; i < sectors ; i++) { |
1671 | u16 csum; |
1672 | |
1673 | if (sdt[i].app_tag == 0xffff) |
1674 | continue; |
1675 | |
1676 | sector = start_sec + i; |
1677 | |
1678 | switch (scsi_debug_guard) { |
1679 | case 1: |
1680 | csum = ip_compute_csum(fake_storep + |
1681 | sector * scsi_debug_sector_size, |
1682 | scsi_debug_sector_size); |
1683 | break; |
1684 | case 0: |
1685 | csum = crc_t10dif(fake_storep + |
1686 | sector * scsi_debug_sector_size, |
1687 | scsi_debug_sector_size); |
1688 | csum = cpu_to_be16(csum); |
1689 | break; |
1690 | default: |
1691 | BUG(); |
1692 | } |
1693 | |
1694 | if (sdt[i].guard_tag != csum) { |
1695 | printk(KERN_ERR "%s: GUARD check failed on sector %lu" \ |
1696 | " rcvd 0x%04x, data 0x%04x\n", __func__, |
1697 | (unsigned long)sector, |
1698 | be16_to_cpu(sdt[i].guard_tag), |
1699 | be16_to_cpu(csum)); |
1700 | dif_errors++; |
1701 | return 0x01; |
1702 | } |
1703 | |
1704 | if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION && |
1705 | be32_to_cpu(sdt[i].ref_tag) != (sector & 0xffffffff)) { |
1706 | printk(KERN_ERR "%s: REF check failed on sector %lu\n", |
1707 | __func__, (unsigned long)sector); |
1708 | dif_errors++; |
1709 | return 0x03; |
1710 | } |
1711 | |
1712 | if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && |
1713 | be32_to_cpu(sdt[i].ref_tag) != ei_lba) { |
1714 | printk(KERN_ERR "%s: REF check failed on sector %lu\n", |
1715 | __func__, (unsigned long)sector); |
1716 | dif_errors++; |
1717 | return 0x03; |
1718 | } |
1719 | |
1720 | ei_lba++; |
1721 | } |
1722 | |
1723 | resid = sectors * 8; /* Bytes of protection data to copy into sgl */ |
1724 | sector = start_sec; |
1725 | |
1726 | scsi_for_each_prot_sg(SCpnt, psgl, scsi_prot_sg_count(SCpnt), i) { |
1727 | int len = min(psgl->length, resid); |
1728 | |
1729 | paddr = kmap_atomic(sg_page(psgl), KM_IRQ0) + psgl->offset; |
1730 | memcpy(paddr, dif_storep + dif_offset(sector), len); |
1731 | |
1732 | sector += len >> 3; |
1733 | if (sector >= sdebug_store_sectors) { |
1734 | /* Force wrap */ |
1735 | tmp_sec = sector; |
1736 | sector = do_div(tmp_sec, sdebug_store_sectors); |
1737 | } |
1738 | resid -= len; |
1739 | kunmap_atomic(paddr, KM_IRQ0); |
1740 | } |
1741 | |
1742 | dix_reads++; |
1743 | |
1744 | return 0; |
1745 | } |
1746 | |
1747 | static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba, |
1748 | unsigned int num, struct sdebug_dev_info *devip, |
1749 | u32 ei_lba) |
1750 | { |
1751 | unsigned long iflags; |
1752 | int ret; |
1753 | |
1754 | ret = check_device_access_params(devip, lba, num); |
1755 | if (ret) |
1756 | return ret; |
1757 | |
1758 | if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) && |
1759 | (lba <= OPT_MEDIUM_ERR_ADDR) && |
1760 | ((lba + num) > OPT_MEDIUM_ERR_ADDR)) { |
1761 | /* claim unrecoverable read error */ |
1762 | mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR, |
1763 | 0); |
1764 | /* set info field and valid bit for fixed descriptor */ |
1765 | if (0x70 == (devip->sense_buff[0] & 0x7f)) { |
1766 | devip->sense_buff[0] |= 0x80; /* Valid bit */ |
1767 | ret = OPT_MEDIUM_ERR_ADDR; |
1768 | devip->sense_buff[3] = (ret >> 24) & 0xff; |
1769 | devip->sense_buff[4] = (ret >> 16) & 0xff; |
1770 | devip->sense_buff[5] = (ret >> 8) & 0xff; |
1771 | devip->sense_buff[6] = ret & 0xff; |
1772 | } |
1773 | return check_condition_result; |
1774 | } |
1775 | |
1776 | /* DIX + T10 DIF */ |
1777 | if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) { |
1778 | int prot_ret = prot_verify_read(SCpnt, lba, num, ei_lba); |
1779 | |
1780 | if (prot_ret) { |
1781 | mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, prot_ret); |
1782 | return illegal_condition_result; |
1783 | } |
1784 | } |
1785 | |
1786 | read_lock_irqsave(&atomic_rw, iflags); |
1787 | ret = do_device_access(SCpnt, devip, lba, num, 0); |
1788 | read_unlock_irqrestore(&atomic_rw, iflags); |
1789 | return ret; |
1790 | } |
1791 | |
1792 | void dump_sector(unsigned char *buf, int len) |
1793 | { |
1794 | int i, j; |
1795 | |
1796 | printk(KERN_ERR ">>> Sector Dump <<<\n"); |
1797 | |
1798 | for (i = 0 ; i < len ; i += 16) { |
1799 | printk(KERN_ERR "%04d: ", i); |
1800 | |
1801 | for (j = 0 ; j < 16 ; j++) { |
1802 | unsigned char c = buf[i+j]; |
1803 | if (c >= 0x20 && c < 0x7e) |
1804 | printk(" %c ", buf[i+j]); |
1805 | else |
1806 | printk("%02x ", buf[i+j]); |
1807 | } |
1808 | |
1809 | printk("\n"); |
1810 | } |
1811 | } |
1812 | |
1813 | static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec, |
1814 | unsigned int sectors, u32 ei_lba) |
1815 | { |
1816 | int i, j, ret; |
1817 | struct sd_dif_tuple *sdt; |
1818 | struct scatterlist *dsgl = scsi_sglist(SCpnt); |
1819 | struct scatterlist *psgl = scsi_prot_sglist(SCpnt); |
1820 | void *daddr, *paddr; |
1821 | sector_t tmp_sec = start_sec; |
1822 | sector_t sector; |
1823 | int ppage_offset; |
1824 | unsigned short csum; |
1825 | |
1826 | sector = do_div(tmp_sec, sdebug_store_sectors); |
1827 | |
1828 | BUG_ON(scsi_sg_count(SCpnt) == 0); |
1829 | BUG_ON(scsi_prot_sg_count(SCpnt) == 0); |
1830 | |
1831 | paddr = kmap_atomic(sg_page(psgl), KM_IRQ1) + psgl->offset; |
1832 | ppage_offset = 0; |
1833 | |
1834 | /* For each data page */ |
1835 | scsi_for_each_sg(SCpnt, dsgl, scsi_sg_count(SCpnt), i) { |
1836 | daddr = kmap_atomic(sg_page(dsgl), KM_IRQ0) + dsgl->offset; |
1837 | |
1838 | /* For each sector-sized chunk in data page */ |
1839 | for (j = 0 ; j < dsgl->length ; j += scsi_debug_sector_size) { |
1840 | |
1841 | /* If we're at the end of the current |
1842 | * protection page advance to the next one |
1843 | */ |
1844 | if (ppage_offset >= psgl->length) { |
1845 | kunmap_atomic(paddr, KM_IRQ1); |
1846 | psgl = sg_next(psgl); |
1847 | BUG_ON(psgl == NULL); |
1848 | paddr = kmap_atomic(sg_page(psgl), KM_IRQ1) |
1849 | + psgl->offset; |
1850 | ppage_offset = 0; |
1851 | } |
1852 | |
1853 | sdt = paddr + ppage_offset; |
1854 | |
1855 | switch (scsi_debug_guard) { |
1856 | case 1: |
1857 | csum = ip_compute_csum(daddr, |
1858 | scsi_debug_sector_size); |
1859 | break; |
1860 | case 0: |
1861 | csum = cpu_to_be16(crc_t10dif(daddr, |
1862 | scsi_debug_sector_size)); |
1863 | break; |
1864 | default: |
1865 | BUG(); |
1866 | ret = 0; |
1867 | goto out; |
1868 | } |
1869 | |
1870 | if (sdt->guard_tag != csum) { |
1871 | printk(KERN_ERR |
1872 | "%s: GUARD check failed on sector %lu " \ |
1873 | "rcvd 0x%04x, calculated 0x%04x\n", |
1874 | __func__, (unsigned long)sector, |
1875 | be16_to_cpu(sdt->guard_tag), |
1876 | be16_to_cpu(csum)); |
1877 | ret = 0x01; |
1878 | dump_sector(daddr, scsi_debug_sector_size); |
1879 | goto out; |
1880 | } |
1881 | |
1882 | if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION && |
1883 | be32_to_cpu(sdt->ref_tag) |
1884 | != (start_sec & 0xffffffff)) { |
1885 | printk(KERN_ERR |
1886 | "%s: REF check failed on sector %lu\n", |
1887 | __func__, (unsigned long)sector); |
1888 | ret = 0x03; |
1889 | dump_sector(daddr, scsi_debug_sector_size); |
1890 | goto out; |
1891 | } |
1892 | |
1893 | if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && |
1894 | be32_to_cpu(sdt->ref_tag) != ei_lba) { |
1895 | printk(KERN_ERR |
1896 | "%s: REF check failed on sector %lu\n", |
1897 | __func__, (unsigned long)sector); |
1898 | ret = 0x03; |
1899 | dump_sector(daddr, scsi_debug_sector_size); |
1900 | goto out; |
1901 | } |
1902 | |
1903 | /* Would be great to copy this in bigger |
1904 | * chunks. However, for the sake of |
1905 | * correctness we need to verify each sector |
1906 | * before writing it to "stable" storage |
1907 | */ |
1908 | memcpy(dif_storep + dif_offset(sector), sdt, 8); |
1909 | |
1910 | sector++; |
1911 | |
1912 | if (sector == sdebug_store_sectors) |
1913 | sector = 0; /* Force wrap */ |
1914 | |
1915 | start_sec++; |
1916 | ei_lba++; |
1917 | daddr += scsi_debug_sector_size; |
1918 | ppage_offset += sizeof(struct sd_dif_tuple); |
1919 | } |
1920 | |
1921 | kunmap_atomic(daddr, KM_IRQ0); |
1922 | } |
1923 | |
1924 | kunmap_atomic(paddr, KM_IRQ1); |
1925 | |
1926 | dix_writes++; |
1927 | |
1928 | return 0; |
1929 | |
1930 | out: |
1931 | dif_errors++; |
1932 | kunmap_atomic(daddr, KM_IRQ0); |
1933 | kunmap_atomic(paddr, KM_IRQ1); |
1934 | return ret; |
1935 | } |
1936 | |
1937 | static unsigned int map_state(sector_t lba, unsigned int *num) |
1938 | { |
1939 | unsigned int granularity, alignment, mapped; |
1940 | sector_t block, next, end; |
1941 | |
1942 | granularity = scsi_debug_unmap_granularity; |
1943 | alignment = granularity - scsi_debug_unmap_alignment; |
1944 | block = lba + alignment; |
1945 | do_div(block, granularity); |
1946 | |
1947 | mapped = test_bit(block, map_storep); |
1948 | |
1949 | if (mapped) |
1950 | next = find_next_zero_bit(map_storep, map_size, block); |
1951 | else |
1952 | next = find_next_bit(map_storep, map_size, block); |
1953 | |
1954 | end = next * granularity - scsi_debug_unmap_alignment; |
1955 | *num = end - lba; |
1956 | |
1957 | return mapped; |
1958 | } |
1959 | |
1960 | static void map_region(sector_t lba, unsigned int len) |
1961 | { |
1962 | unsigned int granularity, alignment; |
1963 | sector_t end = lba + len; |
1964 | |
1965 | granularity = scsi_debug_unmap_granularity; |
1966 | alignment = granularity - scsi_debug_unmap_alignment; |
1967 | |
1968 | while (lba < end) { |
1969 | sector_t block, rem; |
1970 | |
1971 | block = lba + alignment; |
1972 | rem = do_div(block, granularity); |
1973 | |
1974 | set_bit(block, map_storep); |
1975 | |
1976 | lba += granularity - rem; |
1977 | } |
1978 | } |
1979 | |
1980 | static void unmap_region(sector_t lba, unsigned int len) |
1981 | { |
1982 | unsigned int granularity, alignment; |
1983 | sector_t end = lba + len; |
1984 | |
1985 | granularity = scsi_debug_unmap_granularity; |
1986 | alignment = granularity - scsi_debug_unmap_alignment; |
1987 | |
1988 | while (lba < end) { |
1989 | sector_t block, rem; |
1990 | |
1991 | block = lba + alignment; |
1992 | rem = do_div(block, granularity); |
1993 | |
1994 | if (rem == 0 && lba + granularity <= end) |
1995 | clear_bit(block, map_storep); |
1996 | |
1997 | lba += granularity - rem; |
1998 | } |
1999 | } |
2000 | |
2001 | static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba, |
2002 | unsigned int num, struct sdebug_dev_info *devip, |
2003 | u32 ei_lba) |
2004 | { |
2005 | unsigned long iflags; |
2006 | int ret; |
2007 | |
2008 | ret = check_device_access_params(devip, lba, num); |
2009 | if (ret) |
2010 | return ret; |
2011 | |
2012 | /* DIX + T10 DIF */ |
2013 | if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) { |
2014 | int prot_ret = prot_verify_write(SCpnt, lba, num, ei_lba); |
2015 | |
2016 | if (prot_ret) { |
2017 | mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, prot_ret); |
2018 | return illegal_condition_result; |
2019 | } |
2020 | } |
2021 | |
2022 | write_lock_irqsave(&atomic_rw, iflags); |
2023 | ret = do_device_access(SCpnt, devip, lba, num, 1); |
2024 | if (scsi_debug_unmap_granularity) |
2025 | map_region(lba, num); |
2026 | write_unlock_irqrestore(&atomic_rw, iflags); |
2027 | if (-1 == ret) |
2028 | return (DID_ERROR << 16); |
2029 | else if ((ret < (num * scsi_debug_sector_size)) && |
2030 | (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) |
2031 | printk(KERN_INFO "scsi_debug: write: cdb indicated=%u, " |
2032 | " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret); |
2033 | |
2034 | return 0; |
2035 | } |
2036 | |
2037 | static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba, |
2038 | unsigned int num, struct sdebug_dev_info *devip, |
2039 | u32 ei_lba, unsigned int unmap) |
2040 | { |
2041 | unsigned long iflags; |
2042 | unsigned long long i; |
2043 | int ret; |
2044 | |
2045 | ret = check_device_access_params(devip, lba, num); |
2046 | if (ret) |
2047 | return ret; |
2048 | |
2049 | write_lock_irqsave(&atomic_rw, iflags); |
2050 | |
2051 | if (unmap && scsi_debug_unmap_granularity) { |
2052 | unmap_region(lba, num); |
2053 | goto out; |
2054 | } |
2055 | |
2056 | /* Else fetch one logical block */ |
2057 | ret = fetch_to_dev_buffer(scmd, |
2058 | fake_storep + (lba * scsi_debug_sector_size), |
2059 | scsi_debug_sector_size); |
2060 | |
2061 | if (-1 == ret) { |
2062 | write_unlock_irqrestore(&atomic_rw, iflags); |
2063 | return (DID_ERROR << 16); |
2064 | } else if ((ret < (num * scsi_debug_sector_size)) && |
2065 | (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) |
2066 | printk(KERN_INFO "scsi_debug: write same: cdb indicated=%u, " |
2067 | " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret); |
2068 | |
2069 | /* Copy first sector to remaining blocks */ |
2070 | for (i = 1 ; i < num ; i++) |
2071 | memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size), |
2072 | fake_storep + (lba * scsi_debug_sector_size), |
2073 | scsi_debug_sector_size); |
2074 | |
2075 | if (scsi_debug_unmap_granularity) |
2076 | map_region(lba, num); |
2077 | out: |
2078 | write_unlock_irqrestore(&atomic_rw, iflags); |
2079 | |
2080 | return 0; |
2081 | } |
2082 | |
2083 | struct unmap_block_desc { |
2084 | __be64 lba; |
2085 | __be32 blocks; |
2086 | __be32 __reserved; |
2087 | }; |
2088 | |
2089 | static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip) |
2090 | { |
2091 | unsigned char *buf; |
2092 | struct unmap_block_desc *desc; |
2093 | unsigned int i, payload_len, descriptors; |
2094 | int ret; |
2095 | |
2096 | ret = check_readiness(scmd, 1, devip); |
2097 | if (ret) |
2098 | return ret; |
2099 | |
2100 | payload_len = get_unaligned_be16(&scmd->cmnd[7]); |
2101 | BUG_ON(scsi_bufflen(scmd) != payload_len); |
2102 | |
2103 | descriptors = (payload_len - 8) / 16; |
2104 | |
2105 | buf = kmalloc(scsi_bufflen(scmd), GFP_ATOMIC); |
2106 | if (!buf) |
2107 | return check_condition_result; |
2108 | |
2109 | scsi_sg_copy_to_buffer(scmd, buf, scsi_bufflen(scmd)); |
2110 | |
2111 | BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2); |
2112 | BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16); |
2113 | |
2114 | desc = (void *)&buf[8]; |
2115 | |
2116 | for (i = 0 ; i < descriptors ; i++) { |
2117 | unsigned long long lba = get_unaligned_be64(&desc[i].lba); |
2118 | unsigned int num = get_unaligned_be32(&desc[i].blocks); |
2119 | |
2120 | ret = check_device_access_params(devip, lba, num); |
2121 | if (ret) |
2122 | goto out; |
2123 | |
2124 | unmap_region(lba, num); |
2125 | } |
2126 | |
2127 | ret = 0; |
2128 | |
2129 | out: |
2130 | kfree(buf); |
2131 | |
2132 | return ret; |
2133 | } |
2134 | |
2135 | #define SDEBUG_GET_LBA_STATUS_LEN 32 |
2136 | |
2137 | static int resp_get_lba_status(struct scsi_cmnd * scmd, |
2138 | struct sdebug_dev_info * devip) |
2139 | { |
2140 | unsigned long long lba; |
2141 | unsigned int alloc_len, mapped, num; |
2142 | unsigned char arr[SDEBUG_GET_LBA_STATUS_LEN]; |
2143 | int ret; |
2144 | |
2145 | ret = check_readiness(scmd, 1, devip); |
2146 | if (ret) |
2147 | return ret; |
2148 | |
2149 | lba = get_unaligned_be64(&scmd->cmnd[2]); |
2150 | alloc_len = get_unaligned_be32(&scmd->cmnd[10]); |
2151 | |
2152 | if (alloc_len < 24) |
2153 | return 0; |
2154 | |
2155 | ret = check_device_access_params(devip, lba, 1); |
2156 | if (ret) |
2157 | return ret; |
2158 | |
2159 | mapped = map_state(lba, &num); |
2160 | |
2161 | memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN); |
2162 | put_unaligned_be32(16, &arr[0]); /* Parameter Data Length */ |
2163 | put_unaligned_be64(lba, &arr[8]); /* LBA */ |
2164 | put_unaligned_be32(num, &arr[16]); /* Number of blocks */ |
2165 | arr[20] = !mapped; /* mapped = 0, unmapped = 1 */ |
2166 | |
2167 | return fill_from_dev_buffer(scmd, arr, SDEBUG_GET_LBA_STATUS_LEN); |
2168 | } |
2169 | |
2170 | #define SDEBUG_RLUN_ARR_SZ 256 |
2171 | |
2172 | static int resp_report_luns(struct scsi_cmnd * scp, |
2173 | struct sdebug_dev_info * devip) |
2174 | { |
2175 | unsigned int alloc_len; |
2176 | int lun_cnt, i, upper, num, n, wlun, lun; |
2177 | unsigned char *cmd = (unsigned char *)scp->cmnd; |
2178 | int select_report = (int)cmd[2]; |
2179 | struct scsi_lun *one_lun; |
2180 | unsigned char arr[SDEBUG_RLUN_ARR_SZ]; |
2181 | unsigned char * max_addr; |
2182 | |
2183 | alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24); |
2184 | if ((alloc_len < 4) || (select_report > 2)) { |
2185 | mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, |
2186 | 0); |
2187 | return check_condition_result; |
2188 | } |
2189 | /* can produce response with up to 16k luns (lun 0 to lun 16383) */ |
2190 | memset(arr, 0, SDEBUG_RLUN_ARR_SZ); |
2191 | lun_cnt = scsi_debug_max_luns; |
2192 | if (1 == select_report) |
2193 | lun_cnt = 0; |
2194 | else if (scsi_debug_no_lun_0 && (lun_cnt > 0)) |
2195 | --lun_cnt; |
2196 | wlun = (select_report > 0) ? 1 : 0; |
2197 | num = lun_cnt + wlun; |
2198 | arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff; |
2199 | arr[3] = (sizeof(struct scsi_lun) * num) & 0xff; |
2200 | n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) / |
2201 | sizeof(struct scsi_lun)), num); |
2202 | if (n < num) { |
2203 | wlun = 0; |
2204 | lun_cnt = n; |
2205 | } |
2206 | one_lun = (struct scsi_lun *) &arr[8]; |
2207 | max_addr = arr + SDEBUG_RLUN_ARR_SZ; |
2208 | for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0); |
2209 | ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr)); |
2210 | i++, lun++) { |
2211 | upper = (lun >> 8) & 0x3f; |
2212 | if (upper) |
2213 | one_lun[i].scsi_lun[0] = |
2214 | (upper | (SAM2_LUN_ADDRESS_METHOD << 6)); |
2215 | one_lun[i].scsi_lun[1] = lun & 0xff; |
2216 | } |
2217 | if (wlun) { |
2218 | one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff; |
2219 | one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff; |
2220 | i++; |
2221 | } |
2222 | alloc_len = (unsigned char *)(one_lun + i) - arr; |
2223 | return fill_from_dev_buffer(scp, arr, |
2224 | min((int)alloc_len, SDEBUG_RLUN_ARR_SZ)); |
2225 | } |
2226 | |
2227 | static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba, |
2228 | unsigned int num, struct sdebug_dev_info *devip) |
2229 | { |
2230 | int i, j, ret = -1; |
2231 | unsigned char *kaddr, *buf; |
2232 | unsigned int offset; |
2233 | struct scatterlist *sg; |
2234 | struct scsi_data_buffer *sdb = scsi_in(scp); |
2235 | |
2236 | /* better not to use temporary buffer. */ |
2237 | buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC); |
2238 | if (!buf) |
2239 | return ret; |
2240 | |
2241 | scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp)); |
2242 | |
2243 | offset = 0; |
2244 | for_each_sg(sdb->table.sgl, sg, sdb->table.nents, i) { |
2245 | kaddr = (unsigned char *)kmap_atomic(sg_page(sg), KM_USER0); |
2246 | if (!kaddr) |
2247 | goto out; |
2248 | |
2249 | for (j = 0; j < sg->length; j++) |
2250 | *(kaddr + sg->offset + j) ^= *(buf + offset + j); |
2251 | |
2252 | offset += sg->length; |
2253 | kunmap_atomic(kaddr, KM_USER0); |
2254 | } |
2255 | ret = 0; |
2256 | out: |
2257 | kfree(buf); |
2258 | |
2259 | return ret; |
2260 | } |
2261 | |
2262 | /* When timer goes off this function is called. */ |
2263 | static void timer_intr_handler(unsigned long indx) |
2264 | { |
2265 | struct sdebug_queued_cmd * sqcp; |
2266 | unsigned long iflags; |
2267 | |
2268 | if (indx >= SCSI_DEBUG_CANQUEUE) { |
2269 | printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too " |
2270 | "large\n"); |
2271 | return; |
2272 | } |
2273 | spin_lock_irqsave(&queued_arr_lock, iflags); |
2274 | sqcp = &queued_arr[(int)indx]; |
2275 | if (! sqcp->in_use) { |
2276 | printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected " |
2277 | "interrupt\n"); |
2278 | spin_unlock_irqrestore(&queued_arr_lock, iflags); |
2279 | return; |
2280 | } |
2281 | sqcp->in_use = 0; |
2282 | if (sqcp->done_funct) { |
2283 | sqcp->a_cmnd->result = sqcp->scsi_result; |
2284 | sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */ |
2285 | } |
2286 | sqcp->done_funct = NULL; |
2287 | spin_unlock_irqrestore(&queued_arr_lock, iflags); |
2288 | } |
2289 | |
2290 | |
2291 | static struct sdebug_dev_info * |
2292 | sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags) |
2293 | { |
2294 | struct sdebug_dev_info *devip; |
2295 | |
2296 | devip = kzalloc(sizeof(*devip), flags); |
2297 | if (devip) { |
2298 | devip->sdbg_host = sdbg_host; |
2299 | list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list); |
2300 | } |
2301 | return devip; |
2302 | } |
2303 | |
2304 | static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev) |
2305 | { |
2306 | struct sdebug_host_info * sdbg_host; |
2307 | struct sdebug_dev_info * open_devip = NULL; |
2308 | struct sdebug_dev_info * devip = |
2309 | (struct sdebug_dev_info *)sdev->hostdata; |
2310 | |
2311 | if (devip) |
2312 | return devip; |
2313 | sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host); |
2314 | if (!sdbg_host) { |
2315 | printk(KERN_ERR "Host info NULL\n"); |
2316 | return NULL; |
2317 | } |
2318 | list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { |
2319 | if ((devip->used) && (devip->channel == sdev->channel) && |
2320 | (devip->target == sdev->id) && |
2321 | (devip->lun == sdev->lun)) |
2322 | return devip; |
2323 | else { |
2324 | if ((!devip->used) && (!open_devip)) |
2325 | open_devip = devip; |
2326 | } |
2327 | } |
2328 | if (!open_devip) { /* try and make a new one */ |
2329 | open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC); |
2330 | if (!open_devip) { |
2331 | printk(KERN_ERR "%s: out of memory at line %d\n", |
2332 | __func__, __LINE__); |
2333 | return NULL; |
2334 | } |
2335 | } |
2336 | |
2337 | open_devip->channel = sdev->channel; |
2338 | open_devip->target = sdev->id; |
2339 | open_devip->lun = sdev->lun; |
2340 | open_devip->sdbg_host = sdbg_host; |
2341 | open_devip->reset = 1; |
2342 | open_devip->used = 1; |
2343 | memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN); |
2344 | if (scsi_debug_dsense) |
2345 | open_devip->sense_buff[0] = 0x72; |
2346 | else { |
2347 | open_devip->sense_buff[0] = 0x70; |
2348 | open_devip->sense_buff[7] = 0xa; |
2349 | } |
2350 | if (sdev->lun == SAM2_WLUN_REPORT_LUNS) |
2351 | open_devip->wlun = SAM2_WLUN_REPORT_LUNS & 0xff; |
2352 | |
2353 | return open_devip; |
2354 | } |
2355 | |
2356 | static int scsi_debug_slave_alloc(struct scsi_device *sdp) |
2357 | { |
2358 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) |
2359 | printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %u>\n", |
2360 | sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); |
2361 | queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue); |
2362 | return 0; |
2363 | } |
2364 | |
2365 | static int scsi_debug_slave_configure(struct scsi_device *sdp) |
2366 | { |
2367 | struct sdebug_dev_info *devip; |
2368 | |
2369 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) |
2370 | printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %u>\n", |
2371 | sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); |
2372 | if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN) |
2373 | sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN; |
2374 | devip = devInfoReg(sdp); |
2375 | if (NULL == devip) |
2376 | return 1; /* no resources, will be marked offline */ |
2377 | sdp->hostdata = devip; |
2378 | if (sdp->host->cmd_per_lun) |
2379 | scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING, |
2380 | sdp->host->cmd_per_lun); |
2381 | blk_queue_max_segment_size(sdp->request_queue, 256 * 1024); |
2382 | return 0; |
2383 | } |
2384 | |
2385 | static void scsi_debug_slave_destroy(struct scsi_device *sdp) |
2386 | { |
2387 | struct sdebug_dev_info *devip = |
2388 | (struct sdebug_dev_info *)sdp->hostdata; |
2389 | |
2390 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) |
2391 | printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %u>\n", |
2392 | sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); |
2393 | if (devip) { |
2394 | /* make this slot avaliable for re-use */ |
2395 | devip->used = 0; |
2396 | sdp->hostdata = NULL; |
2397 | } |
2398 | } |
2399 | |
2400 | /* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */ |
2401 | static int stop_queued_cmnd(struct scsi_cmnd *cmnd) |
2402 | { |
2403 | unsigned long iflags; |
2404 | int k; |
2405 | struct sdebug_queued_cmd *sqcp; |
2406 | |
2407 | spin_lock_irqsave(&queued_arr_lock, iflags); |
2408 | for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) { |
2409 | sqcp = &queued_arr[k]; |
2410 | if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) { |
2411 | del_timer_sync(&sqcp->cmnd_timer); |
2412 | sqcp->in_use = 0; |
2413 | sqcp->a_cmnd = NULL; |
2414 | break; |
2415 | } |
2416 | } |
2417 | spin_unlock_irqrestore(&queued_arr_lock, iflags); |
2418 | return (k < SCSI_DEBUG_CANQUEUE) ? 1 : 0; |
2419 | } |
2420 | |
2421 | /* Deletes (stops) timers of all queued commands */ |
2422 | static void stop_all_queued(void) |
2423 | { |
2424 | unsigned long iflags; |
2425 | int k; |
2426 | struct sdebug_queued_cmd *sqcp; |
2427 | |
2428 | spin_lock_irqsave(&queued_arr_lock, iflags); |
2429 | for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) { |
2430 | sqcp = &queued_arr[k]; |
2431 | if (sqcp->in_use && sqcp->a_cmnd) { |
2432 | del_timer_sync(&sqcp->cmnd_timer); |
2433 | sqcp->in_use = 0; |
2434 | sqcp->a_cmnd = NULL; |
2435 | } |
2436 | } |
2437 | spin_unlock_irqrestore(&queued_arr_lock, iflags); |
2438 | } |
2439 | |
2440 | static int scsi_debug_abort(struct scsi_cmnd * SCpnt) |
2441 | { |
2442 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) |
2443 | printk(KERN_INFO "scsi_debug: abort\n"); |
2444 | ++num_aborts; |
2445 | stop_queued_cmnd(SCpnt); |
2446 | return SUCCESS; |
2447 | } |
2448 | |
2449 | static int scsi_debug_biosparam(struct scsi_device *sdev, |
2450 | struct block_device * bdev, sector_t capacity, int *info) |
2451 | { |
2452 | int res; |
2453 | unsigned char *buf; |
2454 | |
2455 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) |
2456 | printk(KERN_INFO "scsi_debug: biosparam\n"); |
2457 | buf = scsi_bios_ptable(bdev); |
2458 | if (buf) { |
2459 | res = scsi_partsize(buf, capacity, |
2460 | &info[2], &info[0], &info[1]); |
2461 | kfree(buf); |
2462 | if (! res) |
2463 | return res; |
2464 | } |
2465 | info[0] = sdebug_heads; |
2466 | info[1] = sdebug_sectors_per; |
2467 | info[2] = sdebug_cylinders_per; |
2468 | return 0; |
2469 | } |
2470 | |
2471 | static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt) |
2472 | { |
2473 | struct sdebug_dev_info * devip; |
2474 | |
2475 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) |
2476 | printk(KERN_INFO "scsi_debug: device_reset\n"); |
2477 | ++num_dev_resets; |
2478 | if (SCpnt) { |
2479 | devip = devInfoReg(SCpnt->device); |
2480 | if (devip) |
2481 | devip->reset = 1; |
2482 | } |
2483 | return SUCCESS; |
2484 | } |
2485 | |
2486 | static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt) |
2487 | { |
2488 | struct sdebug_host_info *sdbg_host; |
2489 | struct sdebug_dev_info * dev_info; |
2490 | struct scsi_device * sdp; |
2491 | struct Scsi_Host * hp; |
2492 | |
2493 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) |
2494 | printk(KERN_INFO "scsi_debug: bus_reset\n"); |
2495 | ++num_bus_resets; |
2496 | if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) { |
2497 | sdbg_host = *(struct sdebug_host_info **)shost_priv(hp); |
2498 | if (sdbg_host) { |
2499 | list_for_each_entry(dev_info, |
2500 | &sdbg_host->dev_info_list, |
2501 | dev_list) |
2502 | dev_info->reset = 1; |
2503 | } |
2504 | } |
2505 | return SUCCESS; |
2506 | } |
2507 | |
2508 | static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt) |
2509 | { |
2510 | struct sdebug_host_info * sdbg_host; |
2511 | struct sdebug_dev_info * dev_info; |
2512 | |
2513 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) |
2514 | printk(KERN_INFO "scsi_debug: host_reset\n"); |
2515 | ++num_host_resets; |
2516 | spin_lock(&sdebug_host_list_lock); |
2517 | list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { |
2518 | list_for_each_entry(dev_info, &sdbg_host->dev_info_list, |
2519 | dev_list) |
2520 | dev_info->reset = 1; |
2521 | } |
2522 | spin_unlock(&sdebug_host_list_lock); |
2523 | stop_all_queued(); |
2524 | return SUCCESS; |
2525 | } |
2526 | |
2527 | /* Initializes timers in queued array */ |
2528 | static void __init init_all_queued(void) |
2529 | { |
2530 | unsigned long iflags; |
2531 | int k; |
2532 | struct sdebug_queued_cmd * sqcp; |
2533 | |
2534 | spin_lock_irqsave(&queued_arr_lock, iflags); |
2535 | for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) { |
2536 | sqcp = &queued_arr[k]; |
2537 | init_timer(&sqcp->cmnd_timer); |
2538 | sqcp->in_use = 0; |
2539 | sqcp->a_cmnd = NULL; |
2540 | } |
2541 | spin_unlock_irqrestore(&queued_arr_lock, iflags); |
2542 | } |
2543 | |
2544 | static void __init sdebug_build_parts(unsigned char *ramp, |
2545 | unsigned long store_size) |
2546 | { |
2547 | struct partition * pp; |
2548 | int starts[SDEBUG_MAX_PARTS + 2]; |
2549 | int sectors_per_part, num_sectors, k; |
2550 | int heads_by_sects, start_sec, end_sec; |
2551 | |
2552 | /* assume partition table already zeroed */ |
2553 | if ((scsi_debug_num_parts < 1) || (store_size < 1048576)) |
2554 | return; |
2555 | if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) { |
2556 | scsi_debug_num_parts = SDEBUG_MAX_PARTS; |
2557 | printk(KERN_WARNING "scsi_debug:build_parts: reducing " |
2558 | "partitions to %d\n", SDEBUG_MAX_PARTS); |
2559 | } |
2560 | num_sectors = (int)sdebug_store_sectors; |
2561 | sectors_per_part = (num_sectors - sdebug_sectors_per) |
2562 | / scsi_debug_num_parts; |
2563 | heads_by_sects = sdebug_heads * sdebug_sectors_per; |
2564 | starts[0] = sdebug_sectors_per; |
2565 | for (k = 1; k < scsi_debug_num_parts; ++k) |
2566 | starts[k] = ((k * sectors_per_part) / heads_by_sects) |
2567 | * heads_by_sects; |
2568 | starts[scsi_debug_num_parts] = num_sectors; |
2569 | starts[scsi_debug_num_parts + 1] = 0; |
2570 | |
2571 | ramp[510] = 0x55; /* magic partition markings */ |
2572 | ramp[511] = 0xAA; |
2573 | pp = (struct partition *)(ramp + 0x1be); |
2574 | for (k = 0; starts[k + 1]; ++k, ++pp) { |
2575 | start_sec = starts[k]; |
2576 | end_sec = starts[k + 1] - 1; |
2577 | pp->boot_ind = 0; |
2578 | |
2579 | pp->cyl = start_sec / heads_by_sects; |
2580 | pp->head = (start_sec - (pp->cyl * heads_by_sects)) |
2581 | / sdebug_sectors_per; |
2582 | pp->sector = (start_sec % sdebug_sectors_per) + 1; |
2583 | |
2584 | pp->end_cyl = end_sec / heads_by_sects; |
2585 | pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects)) |
2586 | / sdebug_sectors_per; |
2587 | pp->end_sector = (end_sec % sdebug_sectors_per) + 1; |
2588 | |
2589 | pp->start_sect = start_sec; |
2590 | pp->nr_sects = end_sec - start_sec + 1; |
2591 | pp->sys_ind = 0x83; /* plain Linux partition */ |
2592 | } |
2593 | } |
2594 | |
2595 | static int schedule_resp(struct scsi_cmnd * cmnd, |
2596 | struct sdebug_dev_info * devip, |
2597 | done_funct_t done, int scsi_result, int delta_jiff) |
2598 | { |
2599 | if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) { |
2600 | if (scsi_result) { |
2601 | struct scsi_device * sdp = cmnd->device; |
2602 | |
2603 | printk(KERN_INFO "scsi_debug: <%u %u %u %u> " |
2604 | "non-zero result=0x%x\n", sdp->host->host_no, |
2605 | sdp->channel, sdp->id, sdp->lun, scsi_result); |
2606 | } |
2607 | } |
2608 | if (cmnd && devip) { |
2609 | /* simulate autosense by this driver */ |
2610 | if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff)) |
2611 | memcpy(cmnd->sense_buffer, devip->sense_buff, |
2612 | (SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ? |
2613 | SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE); |
2614 | } |
2615 | if (delta_jiff <= 0) { |
2616 | if (cmnd) |
2617 | cmnd->result = scsi_result; |
2618 | if (done) |
2619 | done(cmnd); |
2620 | return 0; |
2621 | } else { |
2622 | unsigned long iflags; |
2623 | int k; |
2624 | struct sdebug_queued_cmd * sqcp = NULL; |
2625 | |
2626 | spin_lock_irqsave(&queued_arr_lock, iflags); |
2627 | for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) { |
2628 | sqcp = &queued_arr[k]; |
2629 | if (! sqcp->in_use) |
2630 | break; |
2631 | } |
2632 | if (k >= SCSI_DEBUG_CANQUEUE) { |
2633 | spin_unlock_irqrestore(&queued_arr_lock, iflags); |
2634 | printk(KERN_WARNING "scsi_debug: can_queue exceeded\n"); |
2635 | return 1; /* report busy to mid level */ |
2636 | } |
2637 | sqcp->in_use = 1; |
2638 | sqcp->a_cmnd = cmnd; |
2639 | sqcp->scsi_result = scsi_result; |
2640 | sqcp->done_funct = done; |
2641 | sqcp->cmnd_timer.function = timer_intr_handler; |
2642 | sqcp->cmnd_timer.data = k; |
2643 | sqcp->cmnd_timer.expires = jiffies + delta_jiff; |
2644 | add_timer(&sqcp->cmnd_timer); |
2645 | spin_unlock_irqrestore(&queued_arr_lock, iflags); |
2646 | if (cmnd) |
2647 | cmnd->result = 0; |
2648 | return 0; |
2649 | } |
2650 | } |
2651 | /* Note: The following macros create attribute files in the |
2652 | /sys/module/scsi_debug/parameters directory. Unfortunately this |
2653 | driver is unaware of a change and cannot trigger auxiliary actions |
2654 | as it can when the corresponding attribute in the |
2655 | /sys/bus/pseudo/drivers/scsi_debug directory is changed. |
2656 | */ |
2657 | module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR); |
2658 | module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR); |
2659 | module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO); |
2660 | module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR); |
2661 | module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR); |
2662 | module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR); |
2663 | module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR); |
2664 | module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR); |
2665 | module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO); |
2666 | module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR); |
2667 | module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR); |
2668 | module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR); |
2669 | module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO); |
2670 | module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR); |
2671 | module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int, |
2672 | S_IRUGO | S_IWUSR); |
2673 | module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO); |
2674 | module_param_named(dix, scsi_debug_dix, int, S_IRUGO); |
2675 | module_param_named(dif, scsi_debug_dif, int, S_IRUGO); |
2676 | module_param_named(guard, scsi_debug_guard, int, S_IRUGO); |
2677 | module_param_named(ato, scsi_debug_ato, int, S_IRUGO); |
2678 | module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO); |
2679 | module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO); |
2680 | module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO); |
2681 | module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO); |
2682 | module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO); |
2683 | module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO); |
2684 | |
2685 | MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert"); |
2686 | MODULE_DESCRIPTION("SCSI debug adapter driver"); |
2687 | MODULE_LICENSE("GPL"); |
2688 | MODULE_VERSION(SCSI_DEBUG_VERSION); |
2689 | |
2690 | MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)"); |
2691 | MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)"); |
2692 | MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)"); |
2693 | MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)"); |
2694 | MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)"); |
2695 | MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)"); |
2696 | MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)"); |
2697 | MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)"); |
2698 | MODULE_PARM_DESC(num_parts, "number of partitions(def=0)"); |
2699 | MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)"); |
2700 | MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)"); |
2701 | MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])"); |
2702 | MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])"); |
2703 | MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)"); |
2704 | MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)"); |
2705 | MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)"); |
2706 | MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)"); |
2707 | MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)"); |
2708 | MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)"); |
2709 | MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)"); |
2710 | MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)"); |
2711 | MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)"); |
2712 | MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0)"); |
2713 | MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=0)"); |
2714 | MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=0)"); |
2715 | MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)"); |
2716 | |
2717 | static char sdebug_info[256]; |
2718 | |
2719 | static const char * scsi_debug_info(struct Scsi_Host * shp) |
2720 | { |
2721 | sprintf(sdebug_info, "scsi_debug, version %s [%s], " |
2722 | "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION, |
2723 | scsi_debug_version_date, scsi_debug_dev_size_mb, |
2724 | scsi_debug_opts); |
2725 | return sdebug_info; |
2726 | } |
2727 | |
2728 | /* scsi_debug_proc_info |
2729 | * Used if the driver currently has no own support for /proc/scsi |
2730 | */ |
2731 | static int scsi_debug_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset, |
2732 | int length, int inout) |
2733 | { |
2734 | int len, pos, begin; |
2735 | int orig_length; |
2736 | |
2737 | orig_length = length; |
2738 | |
2739 | if (inout == 1) { |
2740 | char arr[16]; |
2741 | int minLen = length > 15 ? 15 : length; |
2742 | |
2743 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) |
2744 | return -EACCES; |
2745 | memcpy(arr, buffer, minLen); |
2746 | arr[minLen] = '\0'; |
2747 | if (1 != sscanf(arr, "%d", &pos)) |
2748 | return -EINVAL; |
2749 | scsi_debug_opts = pos; |
2750 | if (scsi_debug_every_nth != 0) |
2751 | scsi_debug_cmnd_count = 0; |
2752 | return length; |
2753 | } |
2754 | begin = 0; |
2755 | pos = len = sprintf(buffer, "scsi_debug adapter driver, version " |
2756 | "%s [%s]\n" |
2757 | "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, " |
2758 | "every_nth=%d(curr:%d)\n" |
2759 | "delay=%d, max_luns=%d, scsi_level=%d\n" |
2760 | "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n" |
2761 | "number of aborts=%d, device_reset=%d, bus_resets=%d, " |
2762 | "host_resets=%d\ndix_reads=%d dix_writes=%d dif_errors=%d\n", |
2763 | SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts, |
2764 | scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth, |
2765 | scsi_debug_cmnd_count, scsi_debug_delay, |
2766 | scsi_debug_max_luns, scsi_debug_scsi_level, |
2767 | scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads, |
2768 | sdebug_sectors_per, num_aborts, num_dev_resets, num_bus_resets, |
2769 | num_host_resets, dix_reads, dix_writes, dif_errors); |
2770 | if (pos < offset) { |
2771 | len = 0; |
2772 | begin = pos; |
2773 | } |
2774 | *start = buffer + (offset - begin); /* Start of wanted data */ |
2775 | len -= (offset - begin); |
2776 | if (len > length) |
2777 | len = length; |
2778 | return len; |
2779 | } |
2780 | |
2781 | static ssize_t sdebug_delay_show(struct device_driver * ddp, char * buf) |
2782 | { |
2783 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay); |
2784 | } |
2785 | |
2786 | static ssize_t sdebug_delay_store(struct device_driver * ddp, |
2787 | const char * buf, size_t count) |
2788 | { |
2789 | int delay; |
2790 | char work[20]; |
2791 | |
2792 | if (1 == sscanf(buf, "%10s", work)) { |
2793 | if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) { |
2794 | scsi_debug_delay = delay; |
2795 | return count; |
2796 | } |
2797 | } |
2798 | return -EINVAL; |
2799 | } |
2800 | DRIVER_ATTR(delay, S_IRUGO | S_IWUSR, sdebug_delay_show, |
2801 | sdebug_delay_store); |
2802 | |
2803 | static ssize_t sdebug_opts_show(struct device_driver * ddp, char * buf) |
2804 | { |
2805 | return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts); |
2806 | } |
2807 | |
2808 | static ssize_t sdebug_opts_store(struct device_driver * ddp, |
2809 | const char * buf, size_t count) |
2810 | { |
2811 | int opts; |
2812 | char work[20]; |
2813 | |
2814 | if (1 == sscanf(buf, "%10s", work)) { |
2815 | if (0 == strnicmp(work,"0x", 2)) { |
2816 | if (1 == sscanf(&work[2], "%x", &opts)) |
2817 | goto opts_done; |
2818 | } else { |
2819 | if (1 == sscanf(work, "%d", &opts)) |
2820 | goto opts_done; |
2821 | } |
2822 | } |
2823 | return -EINVAL; |
2824 | opts_done: |
2825 | scsi_debug_opts = opts; |
2826 | scsi_debug_cmnd_count = 0; |
2827 | return count; |
2828 | } |
2829 | DRIVER_ATTR(opts, S_IRUGO | S_IWUSR, sdebug_opts_show, |
2830 | sdebug_opts_store); |
2831 | |
2832 | static ssize_t sdebug_ptype_show(struct device_driver * ddp, char * buf) |
2833 | { |
2834 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype); |
2835 | } |
2836 | static ssize_t sdebug_ptype_store(struct device_driver * ddp, |
2837 | const char * buf, size_t count) |
2838 | { |
2839 | int n; |
2840 | |
2841 | if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { |
2842 | scsi_debug_ptype = n; |
2843 | return count; |
2844 | } |
2845 | return -EINVAL; |
2846 | } |
2847 | DRIVER_ATTR(ptype, S_IRUGO | S_IWUSR, sdebug_ptype_show, sdebug_ptype_store); |
2848 | |
2849 | static ssize_t sdebug_dsense_show(struct device_driver * ddp, char * buf) |
2850 | { |
2851 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense); |
2852 | } |
2853 | static ssize_t sdebug_dsense_store(struct device_driver * ddp, |
2854 | const char * buf, size_t count) |
2855 | { |
2856 | int n; |
2857 | |
2858 | if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { |
2859 | scsi_debug_dsense = n; |
2860 | return count; |
2861 | } |
2862 | return -EINVAL; |
2863 | } |
2864 | DRIVER_ATTR(dsense, S_IRUGO | S_IWUSR, sdebug_dsense_show, |
2865 | sdebug_dsense_store); |
2866 | |
2867 | static ssize_t sdebug_fake_rw_show(struct device_driver * ddp, char * buf) |
2868 | { |
2869 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw); |
2870 | } |
2871 | static ssize_t sdebug_fake_rw_store(struct device_driver * ddp, |
2872 | const char * buf, size_t count) |
2873 | { |
2874 | int n; |
2875 | |
2876 | if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { |
2877 | scsi_debug_fake_rw = n; |
2878 | return count; |
2879 | } |
2880 | return -EINVAL; |
2881 | } |
2882 | DRIVER_ATTR(fake_rw, S_IRUGO | S_IWUSR, sdebug_fake_rw_show, |
2883 | sdebug_fake_rw_store); |
2884 | |
2885 | static ssize_t sdebug_no_lun_0_show(struct device_driver * ddp, char * buf) |
2886 | { |
2887 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0); |
2888 | } |
2889 | static ssize_t sdebug_no_lun_0_store(struct device_driver * ddp, |
2890 | const char * buf, size_t count) |
2891 | { |
2892 | int n; |
2893 | |
2894 | if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { |
2895 | scsi_debug_no_lun_0 = n; |
2896 | return count; |
2897 | } |
2898 | return -EINVAL; |
2899 | } |
2900 | DRIVER_ATTR(no_lun_0, S_IRUGO | S_IWUSR, sdebug_no_lun_0_show, |
2901 | sdebug_no_lun_0_store); |
2902 | |
2903 | static ssize_t sdebug_num_tgts_show(struct device_driver * ddp, char * buf) |
2904 | { |
2905 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts); |
2906 | } |
2907 | static ssize_t sdebug_num_tgts_store(struct device_driver * ddp, |
2908 | const char * buf, size_t count) |
2909 | { |
2910 | int n; |
2911 | |
2912 | if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { |
2913 | scsi_debug_num_tgts = n; |
2914 | sdebug_max_tgts_luns(); |
2915 | return count; |
2916 | } |
2917 | return -EINVAL; |
2918 | } |
2919 | DRIVER_ATTR(num_tgts, S_IRUGO | S_IWUSR, sdebug_num_tgts_show, |
2920 | sdebug_num_tgts_store); |
2921 | |
2922 | static ssize_t sdebug_dev_size_mb_show(struct device_driver * ddp, char * buf) |
2923 | { |
2924 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb); |
2925 | } |
2926 | DRIVER_ATTR(dev_size_mb, S_IRUGO, sdebug_dev_size_mb_show, NULL); |
2927 | |
2928 | static ssize_t sdebug_num_parts_show(struct device_driver * ddp, char * buf) |
2929 | { |
2930 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts); |
2931 | } |
2932 | DRIVER_ATTR(num_parts, S_IRUGO, sdebug_num_parts_show, NULL); |
2933 | |
2934 | static ssize_t sdebug_every_nth_show(struct device_driver * ddp, char * buf) |
2935 | { |
2936 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth); |
2937 | } |
2938 | static ssize_t sdebug_every_nth_store(struct device_driver * ddp, |
2939 | const char * buf, size_t count) |
2940 | { |
2941 | int nth; |
2942 | |
2943 | if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) { |
2944 | scsi_debug_every_nth = nth; |
2945 | scsi_debug_cmnd_count = 0; |
2946 | return count; |
2947 | } |
2948 | return -EINVAL; |
2949 | } |
2950 | DRIVER_ATTR(every_nth, S_IRUGO | S_IWUSR, sdebug_every_nth_show, |
2951 | sdebug_every_nth_store); |
2952 | |
2953 | static ssize_t sdebug_max_luns_show(struct device_driver * ddp, char * buf) |
2954 | { |
2955 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns); |
2956 | } |
2957 | static ssize_t sdebug_max_luns_store(struct device_driver * ddp, |
2958 | const char * buf, size_t count) |
2959 | { |
2960 | int n; |
2961 | |
2962 | if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { |
2963 | scsi_debug_max_luns = n; |
2964 | sdebug_max_tgts_luns(); |
2965 | return count; |
2966 | } |
2967 | return -EINVAL; |
2968 | } |
2969 | DRIVER_ATTR(max_luns, S_IRUGO | S_IWUSR, sdebug_max_luns_show, |
2970 | sdebug_max_luns_store); |
2971 | |
2972 | static ssize_t sdebug_scsi_level_show(struct device_driver * ddp, char * buf) |
2973 | { |
2974 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level); |
2975 | } |
2976 | DRIVER_ATTR(scsi_level, S_IRUGO, sdebug_scsi_level_show, NULL); |
2977 | |
2978 | static ssize_t sdebug_virtual_gb_show(struct device_driver * ddp, char * buf) |
2979 | { |
2980 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb); |
2981 | } |
2982 | static ssize_t sdebug_virtual_gb_store(struct device_driver * ddp, |
2983 | const char * buf, size_t count) |
2984 | { |
2985 | int n; |
2986 | |
2987 | if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { |
2988 | scsi_debug_virtual_gb = n; |
2989 | |
2990 | sdebug_capacity = get_sdebug_capacity(); |
2991 | |
2992 | return count; |
2993 | } |
2994 | return -EINVAL; |
2995 | } |
2996 | DRIVER_ATTR(virtual_gb, S_IRUGO | S_IWUSR, sdebug_virtual_gb_show, |
2997 | sdebug_virtual_gb_store); |
2998 | |
2999 | static ssize_t sdebug_add_host_show(struct device_driver * ddp, char * buf) |
3000 | { |
3001 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host); |
3002 | } |
3003 | |
3004 | static ssize_t sdebug_add_host_store(struct device_driver * ddp, |
3005 | const char * buf, size_t count) |
3006 | { |
3007 | int delta_hosts; |
3008 | |
3009 | if (sscanf(buf, "%d", &delta_hosts) != 1) |
3010 | return -EINVAL; |
3011 | if (delta_hosts > 0) { |
3012 | do { |
3013 | sdebug_add_adapter(); |
3014 | } while (--delta_hosts); |
3015 | } else if (delta_hosts < 0) { |
3016 | do { |
3017 | sdebug_remove_adapter(); |
3018 | } while (++delta_hosts); |
3019 | } |
3020 | return count; |
3021 | } |
3022 | DRIVER_ATTR(add_host, S_IRUGO | S_IWUSR, sdebug_add_host_show, |
3023 | sdebug_add_host_store); |
3024 | |
3025 | static ssize_t sdebug_vpd_use_hostno_show(struct device_driver * ddp, |
3026 | char * buf) |
3027 | { |
3028 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno); |
3029 | } |
3030 | static ssize_t sdebug_vpd_use_hostno_store(struct device_driver * ddp, |
3031 | const char * buf, size_t count) |
3032 | { |
3033 | int n; |
3034 | |
3035 | if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { |
3036 | scsi_debug_vpd_use_hostno = n; |
3037 | return count; |
3038 | } |
3039 | return -EINVAL; |
3040 | } |
3041 | DRIVER_ATTR(vpd_use_hostno, S_IRUGO | S_IWUSR, sdebug_vpd_use_hostno_show, |
3042 | sdebug_vpd_use_hostno_store); |
3043 | |
3044 | static ssize_t sdebug_sector_size_show(struct device_driver * ddp, char * buf) |
3045 | { |
3046 | return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size); |
3047 | } |
3048 | DRIVER_ATTR(sector_size, S_IRUGO, sdebug_sector_size_show, NULL); |
3049 | |
3050 | static ssize_t sdebug_dix_show(struct device_driver *ddp, char *buf) |
3051 | { |
3052 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix); |
3053 | } |
3054 | DRIVER_ATTR(dix, S_IRUGO, sdebug_dix_show, NULL); |
3055 | |
3056 | static ssize_t sdebug_dif_show(struct device_driver *ddp, char *buf) |
3057 | { |
3058 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif); |
3059 | } |
3060 | DRIVER_ATTR(dif, S_IRUGO, sdebug_dif_show, NULL); |
3061 | |
3062 | static ssize_t sdebug_guard_show(struct device_driver *ddp, char *buf) |
3063 | { |
3064 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_guard); |
3065 | } |
3066 | DRIVER_ATTR(guard, S_IRUGO, sdebug_guard_show, NULL); |
3067 | |
3068 | static ssize_t sdebug_ato_show(struct device_driver *ddp, char *buf) |
3069 | { |
3070 | return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato); |
3071 | } |
3072 | DRIVER_ATTR(ato, S_IRUGO, sdebug_ato_show, NULL); |
3073 | |
3074 | static ssize_t sdebug_map_show(struct device_driver *ddp, char *buf) |
3075 | { |
3076 | ssize_t count; |
3077 | |
3078 | if (scsi_debug_unmap_granularity == 0) |
3079 | return scnprintf(buf, PAGE_SIZE, "0-%u\n", |
3080 | sdebug_store_sectors); |
3081 | |
3082 | count = bitmap_scnlistprintf(buf, PAGE_SIZE, map_storep, map_size); |
3083 | |
3084 | buf[count++] = '\n'; |
3085 | buf[count++] = 0; |
3086 | |
3087 | return count; |
3088 | } |
3089 | DRIVER_ATTR(map, S_IRUGO, sdebug_map_show, NULL); |
3090 | |
3091 | |
3092 | /* Note: The following function creates attribute files in the |
3093 | /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these |
3094 | files (over those found in the /sys/module/scsi_debug/parameters |
3095 | directory) is that auxiliary actions can be triggered when an attribute |
3096 | is changed. For example see: sdebug_add_host_store() above. |
3097 | */ |
3098 | static int do_create_driverfs_files(void) |
3099 | { |
3100 | int ret; |
3101 | |
3102 | ret = driver_create_file(&sdebug_driverfs_driver, &driver_attr_add_host); |
3103 | ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay); |
3104 | ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb); |
3105 | ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dsense); |
3106 | ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_every_nth); |
3107 | ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_fake_rw); |
3108 | ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_luns); |
3109 | ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0); |
3110 | ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_parts); |
3111 | ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_tgts); |
3112 | ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ptype); |
3113 | ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_opts); |
3114 | ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level); |
3115 | ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb); |
3116 | ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno); |
3117 | ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_sector_size); |
3118 | ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dix); |
3119 | ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dif); |
3120 | ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_guard); |
3121 | ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ato); |
3122 | ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_map); |
3123 | return ret; |
3124 | } |
3125 | |
3126 | static void do_remove_driverfs_files(void) |
3127 | { |
3128 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_map); |
3129 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ato); |
3130 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_guard); |
3131 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dif); |
3132 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dix); |
3133 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_sector_size); |
3134 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno); |
3135 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb); |
3136 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level); |
3137 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_opts); |
3138 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ptype); |
3139 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_tgts); |
3140 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_parts); |
3141 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0); |
3142 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_luns); |
3143 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_fake_rw); |
3144 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_every_nth); |
3145 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dsense); |
3146 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb); |
3147 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay); |
3148 | driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host); |
3149 | } |
3150 | |
3151 | static void pseudo_0_release(struct device *dev) |
3152 | { |
3153 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) |
3154 | printk(KERN_INFO "scsi_debug: pseudo_0_release() called\n"); |
3155 | } |
3156 | |
3157 | static struct device pseudo_primary = { |
3158 | .init_name = "pseudo_0", |
3159 | .release = pseudo_0_release, |
3160 | }; |
3161 | |
3162 | static int __init scsi_debug_init(void) |
3163 | { |
3164 | unsigned long sz; |
3165 | int host_to_add; |
3166 | int k; |
3167 | int ret; |
3168 | |
3169 | switch (scsi_debug_sector_size) { |
3170 | case 512: |
3171 | case 1024: |
3172 | case 2048: |
3173 | case 4096: |
3174 | break; |
3175 | default: |
3176 | printk(KERN_ERR "scsi_debug_init: invalid sector_size %d\n", |
3177 | scsi_debug_sector_size); |
3178 | return -EINVAL; |
3179 | } |
3180 | |
3181 | switch (scsi_debug_dif) { |
3182 | |
3183 | case SD_DIF_TYPE0_PROTECTION: |
3184 | case SD_DIF_TYPE1_PROTECTION: |
3185 | case SD_DIF_TYPE2_PROTECTION: |
3186 | case SD_DIF_TYPE3_PROTECTION: |
3187 | break; |
3188 | |
3189 | default: |
3190 | printk(KERN_ERR "scsi_debug_init: dif must be 0, 1, 2 or 3\n"); |
3191 | return -EINVAL; |
3192 | } |
3193 | |
3194 | if (scsi_debug_guard > 1) { |
3195 | printk(KERN_ERR "scsi_debug_init: guard must be 0 or 1\n"); |
3196 | return -EINVAL; |
3197 | } |
3198 | |
3199 | if (scsi_debug_ato > 1) { |
3200 | printk(KERN_ERR "scsi_debug_init: ato must be 0 or 1\n"); |
3201 | return -EINVAL; |
3202 | } |
3203 | |
3204 | if (scsi_debug_physblk_exp > 15) { |
3205 | printk(KERN_ERR "scsi_debug_init: invalid physblk_exp %u\n", |
3206 | scsi_debug_physblk_exp); |
3207 | return -EINVAL; |
3208 | } |
3209 | |
3210 | if (scsi_debug_lowest_aligned > 0x3fff) { |
3211 | printk(KERN_ERR "scsi_debug_init: lowest_aligned too big: %u\n", |
3212 | scsi_debug_lowest_aligned); |
3213 | return -EINVAL; |
3214 | } |
3215 | |
3216 | if (scsi_debug_dev_size_mb < 1) |
3217 | scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */ |
3218 | sz = (unsigned long)scsi_debug_dev_size_mb * 1048576; |
3219 | sdebug_store_sectors = sz / scsi_debug_sector_size; |
3220 | sdebug_capacity = get_sdebug_capacity(); |
3221 | |
3222 | /* play around with geometry, don't waste too much on track 0 */ |
3223 | sdebug_heads = 8; |
3224 | sdebug_sectors_per = 32; |
3225 | if (scsi_debug_dev_size_mb >= 16) |
3226 | sdebug_heads = 32; |
3227 | else if (scsi_debug_dev_size_mb >= 256) |
3228 | sdebug_heads = 64; |
3229 | sdebug_cylinders_per = (unsigned long)sdebug_capacity / |
3230 | (sdebug_sectors_per * sdebug_heads); |
3231 | if (sdebug_cylinders_per >= 1024) { |
3232 | /* other LLDs do this; implies >= 1GB ram disk ... */ |
3233 | sdebug_heads = 255; |
3234 | sdebug_sectors_per = 63; |
3235 | sdebug_cylinders_per = (unsigned long)sdebug_capacity / |
3236 | (sdebug_sectors_per * sdebug_heads); |
3237 | } |
3238 | |
3239 | fake_storep = vmalloc(sz); |
3240 | if (NULL == fake_storep) { |
3241 | printk(KERN_ERR "scsi_debug_init: out of memory, 1\n"); |
3242 | return -ENOMEM; |
3243 | } |
3244 | memset(fake_storep, 0, sz); |
3245 | if (scsi_debug_num_parts > 0) |
3246 | sdebug_build_parts(fake_storep, sz); |
3247 | |
3248 | if (scsi_debug_dif) { |
3249 | int dif_size; |
3250 | |
3251 | dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple); |
3252 | dif_storep = vmalloc(dif_size); |
3253 | |
3254 | printk(KERN_ERR "scsi_debug_init: dif_storep %u bytes @ %p\n", |
3255 | dif_size, dif_storep); |
3256 | |
3257 | if (dif_storep == NULL) { |
3258 | printk(KERN_ERR "scsi_debug_init: out of mem. (DIX)\n"); |
3259 | ret = -ENOMEM; |
3260 | goto free_vm; |
3261 | } |
3262 | |
3263 | memset(dif_storep, 0xff, dif_size); |
3264 | } |
3265 | |
3266 | if (scsi_debug_unmap_granularity) { |
3267 | unsigned int map_bytes; |
3268 | |
3269 | if (scsi_debug_unmap_granularity < scsi_debug_unmap_alignment) { |
3270 | printk(KERN_ERR |
3271 | "%s: ERR: unmap_granularity < unmap_alignment\n", |
3272 | __func__); |
3273 | return -EINVAL; |
3274 | } |
3275 | |
3276 | map_size = (sdebug_store_sectors / scsi_debug_unmap_granularity); |
3277 | map_bytes = map_size >> 3; |
3278 | map_storep = vmalloc(map_bytes); |
3279 | |
3280 | printk(KERN_INFO "scsi_debug_init: %lu provisioning blocks\n", |
3281 | map_size); |
3282 | |
3283 | if (map_storep == NULL) { |
3284 | printk(KERN_ERR "scsi_debug_init: out of mem. (MAP)\n"); |
3285 | ret = -ENOMEM; |
3286 | goto free_vm; |
3287 | } |
3288 | |
3289 | memset(map_storep, 0x0, map_bytes); |
3290 | |
3291 | /* Map first 1KB for partition table */ |
3292 | if (scsi_debug_num_parts) |
3293 | map_region(0, 2); |
3294 | } |
3295 | |
3296 | ret = device_register(&pseudo_primary); |
3297 | if (ret < 0) { |
3298 | printk(KERN_WARNING "scsi_debug: device_register error: %d\n", |
3299 | ret); |
3300 | goto free_vm; |
3301 | } |
3302 | ret = bus_register(&pseudo_lld_bus); |
3303 | if (ret < 0) { |
3304 | printk(KERN_WARNING "scsi_debug: bus_register error: %d\n", |
3305 | ret); |
3306 | goto dev_unreg; |
3307 | } |
3308 | ret = driver_register(&sdebug_driverfs_driver); |
3309 | if (ret < 0) { |
3310 | printk(KERN_WARNING "scsi_debug: driver_register error: %d\n", |
3311 | ret); |
3312 | goto bus_unreg; |
3313 | } |
3314 | ret = do_create_driverfs_files(); |
3315 | if (ret < 0) { |
3316 | printk(KERN_WARNING "scsi_debug: driver_create_file error: %d\n", |
3317 | ret); |
3318 | goto del_files; |
3319 | } |
3320 | |
3321 | init_all_queued(); |
3322 | |
3323 | host_to_add = scsi_debug_add_host; |
3324 | scsi_debug_add_host = 0; |
3325 | |
3326 | for (k = 0; k < host_to_add; k++) { |
3327 | if (sdebug_add_adapter()) { |
3328 | printk(KERN_ERR "scsi_debug_init: " |
3329 | "sdebug_add_adapter failed k=%d\n", k); |
3330 | break; |
3331 | } |
3332 | } |
3333 | |
3334 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) { |
3335 | printk(KERN_INFO "scsi_debug_init: built %d host(s)\n", |
3336 | scsi_debug_add_host); |
3337 | } |
3338 | return 0; |
3339 | |
3340 | del_files: |
3341 | do_remove_driverfs_files(); |
3342 | driver_unregister(&sdebug_driverfs_driver); |
3343 | bus_unreg: |
3344 | bus_unregister(&pseudo_lld_bus); |
3345 | dev_unreg: |
3346 | device_unregister(&pseudo_primary); |
3347 | free_vm: |
3348 | if (map_storep) |
3349 | vfree(map_storep); |
3350 | if (dif_storep) |
3351 | vfree(dif_storep); |
3352 | vfree(fake_storep); |
3353 | |
3354 | return ret; |
3355 | } |
3356 | |
3357 | static void __exit scsi_debug_exit(void) |
3358 | { |
3359 | int k = scsi_debug_add_host; |
3360 | |
3361 | stop_all_queued(); |
3362 | for (; k; k--) |
3363 | sdebug_remove_adapter(); |
3364 | do_remove_driverfs_files(); |
3365 | driver_unregister(&sdebug_driverfs_driver); |
3366 | bus_unregister(&pseudo_lld_bus); |
3367 | device_unregister(&pseudo_primary); |
3368 | |
3369 | if (dif_storep) |
3370 | vfree(dif_storep); |
3371 | |
3372 | vfree(fake_storep); |
3373 | } |
3374 | |
3375 | device_initcall(scsi_debug_init); |
3376 | module_exit(scsi_debug_exit); |
3377 | |
3378 | static void sdebug_release_adapter(struct device * dev) |
3379 | { |
3380 | struct sdebug_host_info *sdbg_host; |
3381 | |
3382 | sdbg_host = to_sdebug_host(dev); |
3383 | kfree(sdbg_host); |
3384 | } |
3385 | |
3386 | static int sdebug_add_adapter(void) |
3387 | { |
3388 | int k, devs_per_host; |
3389 | int error = 0; |
3390 | struct sdebug_host_info *sdbg_host; |
3391 | struct sdebug_dev_info *sdbg_devinfo, *tmp; |
3392 | |
3393 | sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL); |
3394 | if (NULL == sdbg_host) { |
3395 | printk(KERN_ERR "%s: out of memory at line %d\n", |
3396 | __func__, __LINE__); |
3397 | return -ENOMEM; |
3398 | } |
3399 | |
3400 | INIT_LIST_HEAD(&sdbg_host->dev_info_list); |
3401 | |
3402 | devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns; |
3403 | for (k = 0; k < devs_per_host; k++) { |
3404 | sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL); |
3405 | if (!sdbg_devinfo) { |
3406 | printk(KERN_ERR "%s: out of memory at line %d\n", |
3407 | __func__, __LINE__); |
3408 | error = -ENOMEM; |
3409 | goto clean; |
3410 | } |
3411 | } |
3412 | |
3413 | spin_lock(&sdebug_host_list_lock); |
3414 | list_add_tail(&sdbg_host->host_list, &sdebug_host_list); |
3415 | spin_unlock(&sdebug_host_list_lock); |
3416 | |
3417 | sdbg_host->dev.bus = &pseudo_lld_bus; |
3418 | sdbg_host->dev.parent = &pseudo_primary; |
3419 | sdbg_host->dev.release = &sdebug_release_adapter; |
3420 | dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host); |
3421 | |
3422 | error = device_register(&sdbg_host->dev); |
3423 | |
3424 | if (error) |
3425 | goto clean; |
3426 | |
3427 | ++scsi_debug_add_host; |
3428 | return error; |
3429 | |
3430 | clean: |
3431 | list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list, |
3432 | dev_list) { |
3433 | list_del(&sdbg_devinfo->dev_list); |
3434 | kfree(sdbg_devinfo); |
3435 | } |
3436 | |
3437 | kfree(sdbg_host); |
3438 | return error; |
3439 | } |
3440 | |
3441 | static void sdebug_remove_adapter(void) |
3442 | { |
3443 | struct sdebug_host_info * sdbg_host = NULL; |
3444 | |
3445 | spin_lock(&sdebug_host_list_lock); |
3446 | if (!list_empty(&sdebug_host_list)) { |
3447 | sdbg_host = list_entry(sdebug_host_list.prev, |
3448 | struct sdebug_host_info, host_list); |
3449 | list_del(&sdbg_host->host_list); |
3450 | } |
3451 | spin_unlock(&sdebug_host_list_lock); |
3452 | |
3453 | if (!sdbg_host) |
3454 | return; |
3455 | |
3456 | device_unregister(&sdbg_host->dev); |
3457 | --scsi_debug_add_host; |
3458 | } |
3459 | |
3460 | static |
3461 | int scsi_debug_queuecommand(struct scsi_cmnd *SCpnt, done_funct_t done) |
3462 | { |
3463 | unsigned char *cmd = (unsigned char *) SCpnt->cmnd; |
3464 | int len, k; |
3465 | unsigned int num; |
3466 | unsigned long long lba; |
3467 | u32 ei_lba; |
3468 | int errsts = 0; |
3469 | int target = SCpnt->device->id; |
3470 | struct sdebug_dev_info *devip = NULL; |
3471 | int inj_recovered = 0; |
3472 | int inj_transport = 0; |
3473 | int inj_dif = 0; |
3474 | int inj_dix = 0; |
3475 | int delay_override = 0; |
3476 | int unmap = 0; |
3477 | |
3478 | scsi_set_resid(SCpnt, 0); |
3479 | if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) { |
3480 | printk(KERN_INFO "scsi_debug: cmd "); |
3481 | for (k = 0, len = SCpnt->cmd_len; k < len; ++k) |
3482 | printk("%02x ", (int)cmd[k]); |
3483 | printk("\n"); |
3484 | } |
3485 | |
3486 | if (target == SCpnt->device->host->hostt->this_id) { |
3487 | printk(KERN_INFO "scsi_debug: initiator's id used as " |
3488 | "target!\n"); |
3489 | return schedule_resp(SCpnt, NULL, done, |
3490 | DID_NO_CONNECT << 16, 0); |
3491 | } |
3492 | |
3493 | if ((SCpnt->device->lun >= scsi_debug_max_luns) && |
3494 | (SCpnt->device->lun != SAM2_WLUN_REPORT_LUNS)) |
3495 | return schedule_resp(SCpnt, NULL, done, |
3496 | DID_NO_CONNECT << 16, 0); |
3497 | devip = devInfoReg(SCpnt->device); |
3498 | if (NULL == devip) |
3499 | return schedule_resp(SCpnt, NULL, done, |
3500 | DID_NO_CONNECT << 16, 0); |
3501 | |
3502 | if ((scsi_debug_every_nth != 0) && |
3503 | (++scsi_debug_cmnd_count >= abs(scsi_debug_every_nth))) { |
3504 | scsi_debug_cmnd_count = 0; |
3505 | if (scsi_debug_every_nth < -1) |
3506 | scsi_debug_every_nth = -1; |
3507 | if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts) |
3508 | return 0; /* ignore command causing timeout */ |
3509 | else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts) |
3510 | inj_recovered = 1; /* to reads and writes below */ |
3511 | else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & scsi_debug_opts) |
3512 | inj_transport = 1; /* to reads and writes below */ |
3513 | else if (SCSI_DEBUG_OPT_DIF_ERR & scsi_debug_opts) |
3514 | inj_dif = 1; /* to reads and writes below */ |
3515 | else if (SCSI_DEBUG_OPT_DIX_ERR & scsi_debug_opts) |
3516 | inj_dix = 1; /* to reads and writes below */ |
3517 | } |
3518 | |
3519 | if (devip->wlun) { |
3520 | switch (*cmd) { |
3521 | case INQUIRY: |
3522 | case REQUEST_SENSE: |
3523 | case TEST_UNIT_READY: |
3524 | case REPORT_LUNS: |
3525 | break; /* only allowable wlun commands */ |
3526 | default: |
3527 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) |
3528 | printk(KERN_INFO "scsi_debug: Opcode: 0x%x " |
3529 | "not supported for wlun\n", *cmd); |
3530 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
3531 | INVALID_OPCODE, 0); |
3532 | errsts = check_condition_result; |
3533 | return schedule_resp(SCpnt, devip, done, errsts, |
3534 | 0); |
3535 | } |
3536 | } |
3537 | |
3538 | switch (*cmd) { |
3539 | case INQUIRY: /* mandatory, ignore unit attention */ |
3540 | delay_override = 1; |
3541 | errsts = resp_inquiry(SCpnt, target, devip); |
3542 | break; |
3543 | case REQUEST_SENSE: /* mandatory, ignore unit attention */ |
3544 | delay_override = 1; |
3545 | errsts = resp_requests(SCpnt, devip); |
3546 | break; |
3547 | case REZERO_UNIT: /* actually this is REWIND for SSC */ |
3548 | case START_STOP: |
3549 | errsts = resp_start_stop(SCpnt, devip); |
3550 | break; |
3551 | case ALLOW_MEDIUM_REMOVAL: |
3552 | errsts = check_readiness(SCpnt, 1, devip); |
3553 | if (errsts) |
3554 | break; |
3555 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) |
3556 | printk(KERN_INFO "scsi_debug: Medium removal %s\n", |
3557 | cmd[4] ? "inhibited" : "enabled"); |
3558 | break; |
3559 | case SEND_DIAGNOSTIC: /* mandatory */ |
3560 | errsts = check_readiness(SCpnt, 1, devip); |
3561 | break; |
3562 | case TEST_UNIT_READY: /* mandatory */ |
3563 | delay_override = 1; |
3564 | errsts = check_readiness(SCpnt, 0, devip); |
3565 | break; |
3566 | case RESERVE: |
3567 | errsts = check_readiness(SCpnt, 1, devip); |
3568 | break; |
3569 | case RESERVE_10: |
3570 | errsts = check_readiness(SCpnt, 1, devip); |
3571 | break; |
3572 | case RELEASE: |
3573 | errsts = check_readiness(SCpnt, 1, devip); |
3574 | break; |
3575 | case RELEASE_10: |
3576 | errsts = check_readiness(SCpnt, 1, devip); |
3577 | break; |
3578 | case READ_CAPACITY: |
3579 | errsts = resp_readcap(SCpnt, devip); |
3580 | break; |
3581 | case SERVICE_ACTION_IN: |
3582 | if (cmd[1] == SAI_READ_CAPACITY_16) |
3583 | errsts = resp_readcap16(SCpnt, devip); |
3584 | else if (cmd[1] == SAI_GET_LBA_STATUS) { |
3585 | |
3586 | if (scsi_debug_unmap_max_desc == 0) { |
3587 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
3588 | INVALID_COMMAND_OPCODE, 0); |
3589 | errsts = check_condition_result; |
3590 | } else |
3591 | errsts = resp_get_lba_status(SCpnt, devip); |
3592 | } else { |
3593 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
3594 | INVALID_OPCODE, 0); |
3595 | errsts = check_condition_result; |
3596 | } |
3597 | break; |
3598 | case MAINTENANCE_IN: |
3599 | if (MI_REPORT_TARGET_PGS != cmd[1]) { |
3600 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
3601 | INVALID_OPCODE, 0); |
3602 | errsts = check_condition_result; |
3603 | break; |
3604 | } |
3605 | errsts = resp_report_tgtpgs(SCpnt, devip); |
3606 | break; |
3607 | case READ_16: |
3608 | case READ_12: |
3609 | case READ_10: |
3610 | /* READ{10,12,16} and DIF Type 2 are natural enemies */ |
3611 | if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && |
3612 | cmd[1] & 0xe0) { |
3613 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
3614 | INVALID_COMMAND_OPCODE, 0); |
3615 | errsts = check_condition_result; |
3616 | break; |
3617 | } |
3618 | |
3619 | if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION || |
3620 | scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) && |
3621 | (cmd[1] & 0xe0) == 0) |
3622 | printk(KERN_ERR "Unprotected RD/WR to DIF device\n"); |
3623 | |
3624 | /* fall through */ |
3625 | case READ_6: |
3626 | read: |
3627 | errsts = check_readiness(SCpnt, 0, devip); |
3628 | if (errsts) |
3629 | break; |
3630 | if (scsi_debug_fake_rw) |
3631 | break; |
3632 | get_data_transfer_info(cmd, &lba, &num, &ei_lba); |
3633 | errsts = resp_read(SCpnt, lba, num, devip, ei_lba); |
3634 | if (inj_recovered && (0 == errsts)) { |
3635 | mk_sense_buffer(devip, RECOVERED_ERROR, |
3636 | THRESHOLD_EXCEEDED, 0); |
3637 | errsts = check_condition_result; |
3638 | } else if (inj_transport && (0 == errsts)) { |
3639 | mk_sense_buffer(devip, ABORTED_COMMAND, |
3640 | TRANSPORT_PROBLEM, ACK_NAK_TO); |
3641 | errsts = check_condition_result; |
3642 | } else if (inj_dif && (0 == errsts)) { |
3643 | mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1); |
3644 | errsts = illegal_condition_result; |
3645 | } else if (inj_dix && (0 == errsts)) { |
3646 | mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1); |
3647 | errsts = illegal_condition_result; |
3648 | } |
3649 | break; |
3650 | case REPORT_LUNS: /* mandatory, ignore unit attention */ |
3651 | delay_override = 1; |
3652 | errsts = resp_report_luns(SCpnt, devip); |
3653 | break; |
3654 | case VERIFY: /* 10 byte SBC-2 command */ |
3655 | errsts = check_readiness(SCpnt, 0, devip); |
3656 | break; |
3657 | case WRITE_16: |
3658 | case WRITE_12: |
3659 | case WRITE_10: |
3660 | /* WRITE{10,12,16} and DIF Type 2 are natural enemies */ |
3661 | if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && |
3662 | cmd[1] & 0xe0) { |
3663 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
3664 | INVALID_COMMAND_OPCODE, 0); |
3665 | errsts = check_condition_result; |
3666 | break; |
3667 | } |
3668 | |
3669 | if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION || |
3670 | scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) && |
3671 | (cmd[1] & 0xe0) == 0) |
3672 | printk(KERN_ERR "Unprotected RD/WR to DIF device\n"); |
3673 | |
3674 | /* fall through */ |
3675 | case WRITE_6: |
3676 | write: |
3677 | errsts = check_readiness(SCpnt, 0, devip); |
3678 | if (errsts) |
3679 | break; |
3680 | if (scsi_debug_fake_rw) |
3681 | break; |
3682 | get_data_transfer_info(cmd, &lba, &num, &ei_lba); |
3683 | errsts = resp_write(SCpnt, lba, num, devip, ei_lba); |
3684 | if (inj_recovered && (0 == errsts)) { |
3685 | mk_sense_buffer(devip, RECOVERED_ERROR, |
3686 | THRESHOLD_EXCEEDED, 0); |
3687 | errsts = check_condition_result; |
3688 | } else if (inj_dif && (0 == errsts)) { |
3689 | mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1); |
3690 | errsts = illegal_condition_result; |
3691 | } else if (inj_dix && (0 == errsts)) { |
3692 | mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1); |
3693 | errsts = illegal_condition_result; |
3694 | } |
3695 | break; |
3696 | case WRITE_SAME_16: |
3697 | if (cmd[1] & 0x8) |
3698 | unmap = 1; |
3699 | /* fall through */ |
3700 | case WRITE_SAME: |
3701 | errsts = check_readiness(SCpnt, 0, devip); |
3702 | if (errsts) |
3703 | break; |
3704 | get_data_transfer_info(cmd, &lba, &num, &ei_lba); |
3705 | errsts = resp_write_same(SCpnt, lba, num, devip, ei_lba, unmap); |
3706 | break; |
3707 | case UNMAP: |
3708 | errsts = check_readiness(SCpnt, 0, devip); |
3709 | if (errsts) |
3710 | break; |
3711 | |
3712 | if (scsi_debug_unmap_max_desc == 0) { |
3713 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
3714 | INVALID_COMMAND_OPCODE, 0); |
3715 | errsts = check_condition_result; |
3716 | } else |
3717 | errsts = resp_unmap(SCpnt, devip); |
3718 | break; |
3719 | case MODE_SENSE: |
3720 | case MODE_SENSE_10: |
3721 | errsts = resp_mode_sense(SCpnt, target, devip); |
3722 | break; |
3723 | case MODE_SELECT: |
3724 | errsts = resp_mode_select(SCpnt, 1, devip); |
3725 | break; |
3726 | case MODE_SELECT_10: |
3727 | errsts = resp_mode_select(SCpnt, 0, devip); |
3728 | break; |
3729 | case LOG_SENSE: |
3730 | errsts = resp_log_sense(SCpnt, devip); |
3731 | break; |
3732 | case SYNCHRONIZE_CACHE: |
3733 | delay_override = 1; |
3734 | errsts = check_readiness(SCpnt, 0, devip); |
3735 | break; |
3736 | case WRITE_BUFFER: |
3737 | errsts = check_readiness(SCpnt, 1, devip); |
3738 | break; |
3739 | case XDWRITEREAD_10: |
3740 | if (!scsi_bidi_cmnd(SCpnt)) { |
3741 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
3742 | INVALID_FIELD_IN_CDB, 0); |
3743 | errsts = check_condition_result; |
3744 | break; |
3745 | } |
3746 | |
3747 | errsts = check_readiness(SCpnt, 0, devip); |
3748 | if (errsts) |
3749 | break; |
3750 | if (scsi_debug_fake_rw) |
3751 | break; |
3752 | get_data_transfer_info(cmd, &lba, &num, &ei_lba); |
3753 | errsts = resp_read(SCpnt, lba, num, devip, ei_lba); |
3754 | if (errsts) |
3755 | break; |
3756 | errsts = resp_write(SCpnt, lba, num, devip, ei_lba); |
3757 | if (errsts) |
3758 | break; |
3759 | errsts = resp_xdwriteread(SCpnt, lba, num, devip); |
3760 | break; |
3761 | case VARIABLE_LENGTH_CMD: |
3762 | if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION) { |
3763 | |
3764 | if ((cmd[10] & 0xe0) == 0) |
3765 | printk(KERN_ERR |
3766 | "Unprotected RD/WR to DIF device\n"); |
3767 | |
3768 | if (cmd[9] == READ_32) { |
3769 | BUG_ON(SCpnt->cmd_len < 32); |
3770 | goto read; |
3771 | } |
3772 | |
3773 | if (cmd[9] == WRITE_32) { |
3774 | BUG_ON(SCpnt->cmd_len < 32); |
3775 | goto write; |
3776 | } |
3777 | } |
3778 | |
3779 | mk_sense_buffer(devip, ILLEGAL_REQUEST, |
3780 | INVALID_FIELD_IN_CDB, 0); |
3781 | errsts = check_condition_result; |
3782 | break; |
3783 | |
3784 | default: |
3785 | if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) |
3786 | printk(KERN_INFO "scsi_debug: Opcode: 0x%x not " |
3787 | "supported\n", *cmd); |
3788 | errsts = check_readiness(SCpnt, 1, devip); |
3789 | if (errsts) |
3790 | break; /* Unit attention takes precedence */ |
3791 | mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0); |
3792 | errsts = check_condition_result; |
3793 | break; |
3794 | } |
3795 | return schedule_resp(SCpnt, devip, done, errsts, |
3796 | (delay_override ? 0 : scsi_debug_delay)); |
3797 | } |
3798 | |
3799 | static struct scsi_host_template sdebug_driver_template = { |
3800 | .proc_info = scsi_debug_proc_info, |
3801 | .proc_name = sdebug_proc_name, |
3802 | .name = "SCSI DEBUG", |
3803 | .info = scsi_debug_info, |
3804 | .slave_alloc = scsi_debug_slave_alloc, |
3805 | .slave_configure = scsi_debug_slave_configure, |
3806 | .slave_destroy = scsi_debug_slave_destroy, |
3807 | .ioctl = scsi_debug_ioctl, |
3808 | .queuecommand = scsi_debug_queuecommand, |
3809 | .eh_abort_handler = scsi_debug_abort, |
3810 | .eh_bus_reset_handler = scsi_debug_bus_reset, |
3811 | .eh_device_reset_handler = scsi_debug_device_reset, |
3812 | .eh_host_reset_handler = scsi_debug_host_reset, |
3813 | .bios_param = scsi_debug_biosparam, |
3814 | .can_queue = SCSI_DEBUG_CANQUEUE, |
3815 | .this_id = 7, |
3816 | .sg_tablesize = 256, |
3817 | .cmd_per_lun = 16, |
3818 | .max_sectors = 0xffff, |
3819 | .use_clustering = DISABLE_CLUSTERING, |
3820 | .module = THIS_MODULE, |
3821 | }; |
3822 | |
3823 | static int sdebug_driver_probe(struct device * dev) |
3824 | { |
3825 | int error = 0; |
3826 | struct sdebug_host_info *sdbg_host; |
3827 | struct Scsi_Host *hpnt; |
3828 | int host_prot; |
3829 | |
3830 | sdbg_host = to_sdebug_host(dev); |
3831 | |
3832 | hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host)); |
3833 | if (NULL == hpnt) { |
3834 | printk(KERN_ERR "%s: scsi_register failed\n", __func__); |
3835 | error = -ENODEV; |
3836 | return error; |
3837 | } |
3838 | |
3839 | sdbg_host->shost = hpnt; |
3840 | *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host; |
3841 | if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id)) |
3842 | hpnt->max_id = scsi_debug_num_tgts + 1; |
3843 | else |
3844 | hpnt->max_id = scsi_debug_num_tgts; |
3845 | hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */ |
3846 | |
3847 | host_prot = 0; |
3848 | |
3849 | switch (scsi_debug_dif) { |
3850 | |
3851 | case SD_DIF_TYPE1_PROTECTION: |
3852 | host_prot = SHOST_DIF_TYPE1_PROTECTION; |
3853 | if (scsi_debug_dix) |
3854 | host_prot |= SHOST_DIX_TYPE1_PROTECTION; |
3855 | break; |
3856 | |
3857 | case SD_DIF_TYPE2_PROTECTION: |
3858 | host_prot = SHOST_DIF_TYPE2_PROTECTION; |
3859 | if (scsi_debug_dix) |
3860 | host_prot |= SHOST_DIX_TYPE2_PROTECTION; |
3861 | break; |
3862 | |
3863 | case SD_DIF_TYPE3_PROTECTION: |
3864 | host_prot = SHOST_DIF_TYPE3_PROTECTION; |
3865 | if (scsi_debug_dix) |
3866 | host_prot |= SHOST_DIX_TYPE3_PROTECTION; |
3867 | break; |
3868 | |
3869 | default: |
3870 | if (scsi_debug_dix) |
3871 | host_prot |= SHOST_DIX_TYPE0_PROTECTION; |
3872 | break; |
3873 | } |
3874 | |
3875 | scsi_host_set_prot(hpnt, host_prot); |
3876 | |
3877 | printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n", |
3878 | (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "", |
3879 | (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "", |
3880 | (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "", |
3881 | (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "", |
3882 | (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "", |
3883 | (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "", |
3884 | (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : ""); |
3885 | |
3886 | if (scsi_debug_guard == 1) |
3887 | scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP); |
3888 | else |
3889 | scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC); |
3890 | |
3891 | error = scsi_add_host(hpnt, &sdbg_host->dev); |
3892 | if (error) { |
3893 | printk(KERN_ERR "%s: scsi_add_host failed\n", __func__); |
3894 | error = -ENODEV; |
3895 | scsi_host_put(hpnt); |
3896 | } else |
3897 | scsi_scan_host(hpnt); |
3898 | |
3899 | |
3900 | return error; |
3901 | } |
3902 | |
3903 | static int sdebug_driver_remove(struct device * dev) |
3904 | { |
3905 | struct sdebug_host_info *sdbg_host; |
3906 | struct sdebug_dev_info *sdbg_devinfo, *tmp; |
3907 | |
3908 | sdbg_host = to_sdebug_host(dev); |
3909 | |
3910 | if (!sdbg_host) { |
3911 | printk(KERN_ERR "%s: Unable to locate host info\n", |
3912 | __func__); |
3913 | return -ENODEV; |
3914 | } |
3915 | |
3916 | scsi_remove_host(sdbg_host->shost); |
3917 | |
3918 | list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list, |
3919 | dev_list) { |
3920 | list_del(&sdbg_devinfo->dev_list); |
3921 | kfree(sdbg_devinfo); |
3922 | } |
3923 | |
3924 | scsi_host_put(sdbg_host->shost); |
3925 | return 0; |
3926 | } |
3927 | |
3928 | static int pseudo_lld_bus_match(struct device *dev, |
3929 | struct device_driver *dev_driver) |
3930 | { |
3931 | return 1; |
3932 | } |
3933 | |
3934 | static struct bus_type pseudo_lld_bus = { |
3935 | .name = "pseudo", |
3936 | .match = pseudo_lld_bus_match, |
3937 | .probe = sdebug_driver_probe, |
3938 | .remove = sdebug_driver_remove, |
3939 | }; |
3940 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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v3.9