1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
|
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include "event-parse.h"
typedef unsigned long sector_t;
typedef uint64_t u64;
typedef unsigned int u32;
/*
* SCSI opcodes
*/
#define TEST_UNIT_READY 0x00
#define REZERO_UNIT 0x01
#define REQUEST_SENSE 0x03
#define FORMAT_UNIT 0x04
#define READ_BLOCK_LIMITS 0x05
#define REASSIGN_BLOCKS 0x07
#define INITIALIZE_ELEMENT_STATUS 0x07
#define READ_6 0x08
#define WRITE_6 0x0a
#define SEEK_6 0x0b
#define READ_REVERSE 0x0f
#define WRITE_FILEMARKS 0x10
#define SPACE 0x11
#define INQUIRY 0x12
#define RECOVER_BUFFERED_DATA 0x14
#define MODE_SELECT 0x15
#define RESERVE 0x16
#define RELEASE 0x17
#define COPY 0x18
#define ERASE 0x19
#define MODE_SENSE 0x1a
#define START_STOP 0x1b
#define RECEIVE_DIAGNOSTIC 0x1c
#define SEND_DIAGNOSTIC 0x1d
#define ALLOW_MEDIUM_REMOVAL 0x1e
#define READ_FORMAT_CAPACITIES 0x23
#define SET_WINDOW 0x24
#define READ_CAPACITY 0x25
#define READ_10 0x28
#define WRITE_10 0x2a
#define SEEK_10 0x2b
#define POSITION_TO_ELEMENT 0x2b
#define WRITE_VERIFY 0x2e
#define VERIFY 0x2f
#define SEARCH_HIGH 0x30
#define SEARCH_EQUAL 0x31
#define SEARCH_LOW 0x32
#define SET_LIMITS 0x33
#define PRE_FETCH 0x34
#define READ_POSITION 0x34
#define SYNCHRONIZE_CACHE 0x35
#define LOCK_UNLOCK_CACHE 0x36
#define READ_DEFECT_DATA 0x37
#define MEDIUM_SCAN 0x38
#define COMPARE 0x39
#define COPY_VERIFY 0x3a
#define WRITE_BUFFER 0x3b
#define READ_BUFFER 0x3c
#define UPDATE_BLOCK 0x3d
#define READ_LONG 0x3e
#define WRITE_LONG 0x3f
#define CHANGE_DEFINITION 0x40
#define WRITE_SAME 0x41
#define UNMAP 0x42
#define READ_TOC 0x43
#define READ_HEADER 0x44
#define GET_EVENT_STATUS_NOTIFICATION 0x4a
#define LOG_SELECT 0x4c
#define LOG_SENSE 0x4d
#define XDWRITEREAD_10 0x53
#define MODE_SELECT_10 0x55
#define RESERVE_10 0x56
#define RELEASE_10 0x57
#define MODE_SENSE_10 0x5a
#define PERSISTENT_RESERVE_IN 0x5e
#define PERSISTENT_RESERVE_OUT 0x5f
#define VARIABLE_LENGTH_CMD 0x7f
#define REPORT_LUNS 0xa0
#define SECURITY_PROTOCOL_IN 0xa2
#define MAINTENANCE_IN 0xa3
#define MAINTENANCE_OUT 0xa4
#define MOVE_MEDIUM 0xa5
#define EXCHANGE_MEDIUM 0xa6
#define READ_12 0xa8
#define WRITE_12 0xaa
#define READ_MEDIA_SERIAL_NUMBER 0xab
#define WRITE_VERIFY_12 0xae
#define VERIFY_12 0xaf
#define SEARCH_HIGH_12 0xb0
#define SEARCH_EQUAL_12 0xb1
#define SEARCH_LOW_12 0xb2
#define SECURITY_PROTOCOL_OUT 0xb5
#define READ_ELEMENT_STATUS 0xb8
#define SEND_VOLUME_TAG 0xb6
#define WRITE_LONG_2 0xea
#define EXTENDED_COPY 0x83
#define RECEIVE_COPY_RESULTS 0x84
#define ACCESS_CONTROL_IN 0x86
#define ACCESS_CONTROL_OUT 0x87
#define READ_16 0x88
#define WRITE_16 0x8a
#define READ_ATTRIBUTE 0x8c
#define WRITE_ATTRIBUTE 0x8d
#define VERIFY_16 0x8f
#define SYNCHRONIZE_CACHE_16 0x91
#define WRITE_SAME_16 0x93
#define SERVICE_ACTION_IN_16 0x9e
/* values for service action in */
#define SAI_READ_CAPACITY_16 0x10
#define SAI_GET_LBA_STATUS 0x12
/* values for VARIABLE_LENGTH_CMD service action codes
* see spc4r17 Section D.3.5, table D.7 and D.8 */
#define VLC_SA_RECEIVE_CREDENTIAL 0x1800
/* values for maintenance in */
#define MI_REPORT_IDENTIFYING_INFORMATION 0x05
#define MI_REPORT_TARGET_PGS 0x0a
#define MI_REPORT_ALIASES 0x0b
#define MI_REPORT_SUPPORTED_OPERATION_CODES 0x0c
#define MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS 0x0d
#define MI_REPORT_PRIORITY 0x0e
#define MI_REPORT_TIMESTAMP 0x0f
#define MI_MANAGEMENT_PROTOCOL_IN 0x10
/* value for MI_REPORT_TARGET_PGS ext header */
#define MI_EXT_HDR_PARAM_FMT 0x20
/* values for maintenance out */
#define MO_SET_IDENTIFYING_INFORMATION 0x06
#define MO_SET_TARGET_PGS 0x0a
#define MO_CHANGE_ALIASES 0x0b
#define MO_SET_PRIORITY 0x0e
#define MO_SET_TIMESTAMP 0x0f
#define MO_MANAGEMENT_PROTOCOL_OUT 0x10
/* values for variable length command */
#define XDREAD_32 0x03
#define XDWRITE_32 0x04
#define XPWRITE_32 0x06
#define XDWRITEREAD_32 0x07
#define READ_32 0x09
#define VERIFY_32 0x0a
#define WRITE_32 0x0b
#define WRITE_SAME_32 0x0d
#define SERVICE_ACTION16(cdb) (cdb[1] & 0x1f)
#define SERVICE_ACTION32(cdb) ((cdb[8] << 8) | cdb[9])
static const char *
scsi_trace_misc(struct trace_seq *, unsigned char *, int);
static const char *
scsi_trace_rw6(struct trace_seq *p, unsigned char *cdb, int len)
{
const char *ret = p->buffer + p->len;
sector_t lba = 0, txlen = 0;
lba |= ((cdb[1] & 0x1F) << 16);
lba |= (cdb[2] << 8);
lba |= cdb[3];
txlen = cdb[4];
trace_seq_printf(p, "lba=%llu txlen=%llu",
(unsigned long long)lba, (unsigned long long)txlen);
trace_seq_putc(p, 0);
return ret;
}
static const char *
scsi_trace_rw10(struct trace_seq *p, unsigned char *cdb, int len)
{
const char *ret = p->buffer + p->len;
sector_t lba = 0, txlen = 0;
lba |= (cdb[2] << 24);
lba |= (cdb[3] << 16);
lba |= (cdb[4] << 8);
lba |= cdb[5];
txlen |= (cdb[7] << 8);
txlen |= cdb[8];
trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
(unsigned long long)lba, (unsigned long long)txlen,
cdb[1] >> 5);
if (cdb[0] == WRITE_SAME)
trace_seq_printf(p, " unmap=%u", cdb[1] >> 3 & 1);
trace_seq_putc(p, 0);
return ret;
}
static const char *
scsi_trace_rw12(struct trace_seq *p, unsigned char *cdb, int len)
{
const char *ret = p->buffer + p->len;
sector_t lba = 0, txlen = 0;
lba |= (cdb[2] << 24);
lba |= (cdb[3] << 16);
lba |= (cdb[4] << 8);
lba |= cdb[5];
txlen |= (cdb[6] << 24);
txlen |= (cdb[7] << 16);
txlen |= (cdb[8] << 8);
txlen |= cdb[9];
trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
(unsigned long long)lba, (unsigned long long)txlen,
cdb[1] >> 5);
trace_seq_putc(p, 0);
return ret;
}
static const char *
scsi_trace_rw16(struct trace_seq *p, unsigned char *cdb, int len)
{
const char *ret = p->buffer + p->len;
sector_t lba = 0, txlen = 0;
lba |= ((u64)cdb[2] << 56);
lba |= ((u64)cdb[3] << 48);
lba |= ((u64)cdb[4] << 40);
lba |= ((u64)cdb[5] << 32);
lba |= (cdb[6] << 24);
lba |= (cdb[7] << 16);
lba |= (cdb[8] << 8);
lba |= cdb[9];
txlen |= (cdb[10] << 24);
txlen |= (cdb[11] << 16);
txlen |= (cdb[12] << 8);
txlen |= cdb[13];
trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
(unsigned long long)lba, (unsigned long long)txlen,
cdb[1] >> 5);
if (cdb[0] == WRITE_SAME_16)
trace_seq_printf(p, " unmap=%u", cdb[1] >> 3 & 1);
trace_seq_putc(p, 0);
return ret;
}
static const char *
scsi_trace_rw32(struct trace_seq *p, unsigned char *cdb, int len)
{
const char *ret = p->buffer + p->len, *cmd;
sector_t lba = 0, txlen = 0;
u32 ei_lbrt = 0;
switch (SERVICE_ACTION32(cdb)) {
case READ_32:
cmd = "READ";
break;
case VERIFY_32:
cmd = "VERIFY";
break;
case WRITE_32:
cmd = "WRITE";
break;
case WRITE_SAME_32:
cmd = "WRITE_SAME";
break;
default:
trace_seq_printf(p, "UNKNOWN");
goto out;
}
lba |= ((u64)cdb[12] << 56);
lba |= ((u64)cdb[13] << 48);
lba |= ((u64)cdb[14] << 40);
lba |= ((u64)cdb[15] << 32);
lba |= (cdb[16] << 24);
lba |= (cdb[17] << 16);
lba |= (cdb[18] << 8);
lba |= cdb[19];
ei_lbrt |= (cdb[20] << 24);
ei_lbrt |= (cdb[21] << 16);
ei_lbrt |= (cdb[22] << 8);
ei_lbrt |= cdb[23];
txlen |= (cdb[28] << 24);
txlen |= (cdb[29] << 16);
txlen |= (cdb[30] << 8);
txlen |= cdb[31];
trace_seq_printf(p, "%s_32 lba=%llu txlen=%llu protect=%u ei_lbrt=%u",
cmd, (unsigned long long)lba,
(unsigned long long)txlen, cdb[10] >> 5, ei_lbrt);
if (SERVICE_ACTION32(cdb) == WRITE_SAME_32)
trace_seq_printf(p, " unmap=%u", cdb[10] >> 3 & 1);
out:
trace_seq_putc(p, 0);
return ret;
}
static const char *
scsi_trace_unmap(struct trace_seq *p, unsigned char *cdb, int len)
{
const char *ret = p->buffer + p->len;
unsigned int regions = cdb[7] << 8 | cdb[8];
trace_seq_printf(p, "regions=%u", (regions - 8) / 16);
trace_seq_putc(p, 0);
return ret;
}
static const char *
scsi_trace_service_action_in(struct trace_seq *p, unsigned char *cdb, int len)
{
const char *ret = p->buffer + p->len, *cmd;
sector_t lba = 0;
u32 alloc_len = 0;
switch (SERVICE_ACTION16(cdb)) {
case SAI_READ_CAPACITY_16:
cmd = "READ_CAPACITY_16";
break;
case SAI_GET_LBA_STATUS:
cmd = "GET_LBA_STATUS";
break;
default:
trace_seq_printf(p, "UNKNOWN");
goto out;
}
lba |= ((u64)cdb[2] << 56);
lba |= ((u64)cdb[3] << 48);
lba |= ((u64)cdb[4] << 40);
lba |= ((u64)cdb[5] << 32);
lba |= (cdb[6] << 24);
lba |= (cdb[7] << 16);
lba |= (cdb[8] << 8);
lba |= cdb[9];
alloc_len |= (cdb[10] << 24);
alloc_len |= (cdb[11] << 16);
alloc_len |= (cdb[12] << 8);
alloc_len |= cdb[13];
trace_seq_printf(p, "%s lba=%llu alloc_len=%u", cmd,
(unsigned long long)lba, alloc_len);
out:
trace_seq_putc(p, 0);
return ret;
}
static const char *
scsi_trace_varlen(struct trace_seq *p, unsigned char *cdb, int len)
{
switch (SERVICE_ACTION32(cdb)) {
case READ_32:
case VERIFY_32:
case WRITE_32:
case WRITE_SAME_32:
return scsi_trace_rw32(p, cdb, len);
default:
return scsi_trace_misc(p, cdb, len);
}
}
static const char *
scsi_trace_misc(struct trace_seq *p, unsigned char *cdb, int len)
{
const char *ret = p->buffer + p->len;
trace_seq_printf(p, "-");
trace_seq_putc(p, 0);
return ret;
}
const char *
scsi_trace_parse_cdb(struct trace_seq *p, unsigned char *cdb, int len)
{
switch (cdb[0]) {
case READ_6:
case WRITE_6:
return scsi_trace_rw6(p, cdb, len);
case READ_10:
case VERIFY:
case WRITE_10:
case WRITE_SAME:
return scsi_trace_rw10(p, cdb, len);
case READ_12:
case VERIFY_12:
case WRITE_12:
return scsi_trace_rw12(p, cdb, len);
case READ_16:
case VERIFY_16:
case WRITE_16:
case WRITE_SAME_16:
return scsi_trace_rw16(p, cdb, len);
case UNMAP:
return scsi_trace_unmap(p, cdb, len);
case SERVICE_ACTION_IN_16:
return scsi_trace_service_action_in(p, cdb, len);
case VARIABLE_LENGTH_CMD:
return scsi_trace_varlen(p, cdb, len);
default:
return scsi_trace_misc(p, cdb, len);
}
}
unsigned long long process_scsi_trace_parse_cdb(struct trace_seq *s,
unsigned long long *args)
{
scsi_trace_parse_cdb(s, (unsigned char *) (unsigned long) args[1], args[2]);
return 0;
}
int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
{
pevent_register_print_function(pevent,
process_scsi_trace_parse_cdb,
PEVENT_FUNC_ARG_STRING,
"scsi_trace_parse_cdb",
PEVENT_FUNC_ARG_PTR,
PEVENT_FUNC_ARG_PTR,
PEVENT_FUNC_ARG_INT,
PEVENT_FUNC_ARG_VOID);
return 0;
}
void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
{
pevent_unregister_print_function(pevent, process_scsi_trace_parse_cdb,
"scsi_trace_parse_cdb");
}
|
