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1// SPDX-License-Identifier: GPL-2.0
2#include <stdio.h>
3#include <string.h>
4#include <inttypes.h>
5#include "event-parse.h"
6#include "trace-seq.h"
7
8typedef unsigned long sector_t;
9typedef uint64_t u64;
10typedef unsigned int u32;
11
12/*
13 * SCSI opcodes
14 */
15#define TEST_UNIT_READY 0x00
16#define REZERO_UNIT 0x01
17#define REQUEST_SENSE 0x03
18#define FORMAT_UNIT 0x04
19#define READ_BLOCK_LIMITS 0x05
20#define REASSIGN_BLOCKS 0x07
21#define INITIALIZE_ELEMENT_STATUS 0x07
22#define READ_6 0x08
23#define WRITE_6 0x0a
24#define SEEK_6 0x0b
25#define READ_REVERSE 0x0f
26#define WRITE_FILEMARKS 0x10
27#define SPACE 0x11
28#define INQUIRY 0x12
29#define RECOVER_BUFFERED_DATA 0x14
30#define MODE_SELECT 0x15
31#define RESERVE 0x16
32#define RELEASE 0x17
33#define COPY 0x18
34#define ERASE 0x19
35#define MODE_SENSE 0x1a
36#define START_STOP 0x1b
37#define RECEIVE_DIAGNOSTIC 0x1c
38#define SEND_DIAGNOSTIC 0x1d
39#define ALLOW_MEDIUM_REMOVAL 0x1e
40
41#define READ_FORMAT_CAPACITIES 0x23
42#define SET_WINDOW 0x24
43#define READ_CAPACITY 0x25
44#define READ_10 0x28
45#define WRITE_10 0x2a
46#define SEEK_10 0x2b
47#define POSITION_TO_ELEMENT 0x2b
48#define WRITE_VERIFY 0x2e
49#define VERIFY 0x2f
50#define SEARCH_HIGH 0x30
51#define SEARCH_EQUAL 0x31
52#define SEARCH_LOW 0x32
53#define SET_LIMITS 0x33
54#define PRE_FETCH 0x34
55#define READ_POSITION 0x34
56#define SYNCHRONIZE_CACHE 0x35
57#define LOCK_UNLOCK_CACHE 0x36
58#define READ_DEFECT_DATA 0x37
59#define MEDIUM_SCAN 0x38
60#define COMPARE 0x39
61#define COPY_VERIFY 0x3a
62#define WRITE_BUFFER 0x3b
63#define READ_BUFFER 0x3c
64#define UPDATE_BLOCK 0x3d
65#define READ_LONG 0x3e
66#define WRITE_LONG 0x3f
67#define CHANGE_DEFINITION 0x40
68#define WRITE_SAME 0x41
69#define UNMAP 0x42
70#define READ_TOC 0x43
71#define READ_HEADER 0x44
72#define GET_EVENT_STATUS_NOTIFICATION 0x4a
73#define LOG_SELECT 0x4c
74#define LOG_SENSE 0x4d
75#define XDWRITEREAD_10 0x53
76#define MODE_SELECT_10 0x55
77#define RESERVE_10 0x56
78#define RELEASE_10 0x57
79#define MODE_SENSE_10 0x5a
80#define PERSISTENT_RESERVE_IN 0x5e
81#define PERSISTENT_RESERVE_OUT 0x5f
82#define VARIABLE_LENGTH_CMD 0x7f
83#define REPORT_LUNS 0xa0
84#define SECURITY_PROTOCOL_IN 0xa2
85#define MAINTENANCE_IN 0xa3
86#define MAINTENANCE_OUT 0xa4
87#define MOVE_MEDIUM 0xa5
88#define EXCHANGE_MEDIUM 0xa6
89#define READ_12 0xa8
90#define SERVICE_ACTION_OUT_12 0xa9
91#define WRITE_12 0xaa
92#define SERVICE_ACTION_IN_12 0xab
93#define WRITE_VERIFY_12 0xae
94#define VERIFY_12 0xaf
95#define SEARCH_HIGH_12 0xb0
96#define SEARCH_EQUAL_12 0xb1
97#define SEARCH_LOW_12 0xb2
98#define SECURITY_PROTOCOL_OUT 0xb5
99#define READ_ELEMENT_STATUS 0xb8
100#define SEND_VOLUME_TAG 0xb6
101#define WRITE_LONG_2 0xea
102#define EXTENDED_COPY 0x83
103#define RECEIVE_COPY_RESULTS 0x84
104#define ACCESS_CONTROL_IN 0x86
105#define ACCESS_CONTROL_OUT 0x87
106#define READ_16 0x88
107#define WRITE_16 0x8a
108#define READ_ATTRIBUTE 0x8c
109#define WRITE_ATTRIBUTE 0x8d
110#define VERIFY_16 0x8f
111#define SYNCHRONIZE_CACHE_16 0x91
112#define WRITE_SAME_16 0x93
113#define SERVICE_ACTION_BIDIRECTIONAL 0x9d
114#define SERVICE_ACTION_IN_16 0x9e
115#define SERVICE_ACTION_OUT_16 0x9f
116/* values for service action in */
117#define SAI_READ_CAPACITY_16 0x10
118#define SAI_GET_LBA_STATUS 0x12
119/* values for VARIABLE_LENGTH_CMD service action codes
120 * see spc4r17 Section D.3.5, table D.7 and D.8 */
121#define VLC_SA_RECEIVE_CREDENTIAL 0x1800
122/* values for maintenance in */
123#define MI_REPORT_IDENTIFYING_INFORMATION 0x05
124#define MI_REPORT_TARGET_PGS 0x0a
125#define MI_REPORT_ALIASES 0x0b
126#define MI_REPORT_SUPPORTED_OPERATION_CODES 0x0c
127#define MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS 0x0d
128#define MI_REPORT_PRIORITY 0x0e
129#define MI_REPORT_TIMESTAMP 0x0f
130#define MI_MANAGEMENT_PROTOCOL_IN 0x10
131/* value for MI_REPORT_TARGET_PGS ext header */
132#define MI_EXT_HDR_PARAM_FMT 0x20
133/* values for maintenance out */
134#define MO_SET_IDENTIFYING_INFORMATION 0x06
135#define MO_SET_TARGET_PGS 0x0a
136#define MO_CHANGE_ALIASES 0x0b
137#define MO_SET_PRIORITY 0x0e
138#define MO_SET_TIMESTAMP 0x0f
139#define MO_MANAGEMENT_PROTOCOL_OUT 0x10
140/* values for variable length command */
141#define XDREAD_32 0x03
142#define XDWRITE_32 0x04
143#define XPWRITE_32 0x06
144#define XDWRITEREAD_32 0x07
145#define READ_32 0x09
146#define VERIFY_32 0x0a
147#define WRITE_32 0x0b
148#define WRITE_SAME_32 0x0d
149
150#define SERVICE_ACTION16(cdb) (cdb[1] & 0x1f)
151#define SERVICE_ACTION32(cdb) ((cdb[8] << 8) | cdb[9])
152
153static const char *
154scsi_trace_misc(struct trace_seq *, unsigned char *, int);
155
156static const char *
157scsi_trace_rw6(struct trace_seq *p, unsigned char *cdb, int len)
158{
159 const char *ret = p->buffer + p->len;
160 sector_t lba = 0, txlen = 0;
161
162 lba |= ((cdb[1] & 0x1F) << 16);
163 lba |= (cdb[2] << 8);
164 lba |= cdb[3];
165 txlen = cdb[4];
166
167 trace_seq_printf(p, "lba=%llu txlen=%llu",
168 (unsigned long long)lba, (unsigned long long)txlen);
169 trace_seq_putc(p, 0);
170 return ret;
171}
172
173static const char *
174scsi_trace_rw10(struct trace_seq *p, unsigned char *cdb, int len)
175{
176 const char *ret = p->buffer + p->len;
177 sector_t lba = 0, txlen = 0;
178
179 lba |= (cdb[2] << 24);
180 lba |= (cdb[3] << 16);
181 lba |= (cdb[4] << 8);
182 lba |= cdb[5];
183 txlen |= (cdb[7] << 8);
184 txlen |= cdb[8];
185
186 trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
187 (unsigned long long)lba, (unsigned long long)txlen,
188 cdb[1] >> 5);
189
190 if (cdb[0] == WRITE_SAME)
191 trace_seq_printf(p, " unmap=%u", cdb[1] >> 3 & 1);
192
193 trace_seq_putc(p, 0);
194 return ret;
195}
196
197static const char *
198scsi_trace_rw12(struct trace_seq *p, unsigned char *cdb, int len)
199{
200 const char *ret = p->buffer + p->len;
201 sector_t lba = 0, txlen = 0;
202
203 lba |= (cdb[2] << 24);
204 lba |= (cdb[3] << 16);
205 lba |= (cdb[4] << 8);
206 lba |= cdb[5];
207 txlen |= (cdb[6] << 24);
208 txlen |= (cdb[7] << 16);
209 txlen |= (cdb[8] << 8);
210 txlen |= cdb[9];
211
212 trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
213 (unsigned long long)lba, (unsigned long long)txlen,
214 cdb[1] >> 5);
215 trace_seq_putc(p, 0);
216 return ret;
217}
218
219static const char *
220scsi_trace_rw16(struct trace_seq *p, unsigned char *cdb, int len)
221{
222 const char *ret = p->buffer + p->len;
223 sector_t lba = 0, txlen = 0;
224
225 lba |= ((u64)cdb[2] << 56);
226 lba |= ((u64)cdb[3] << 48);
227 lba |= ((u64)cdb[4] << 40);
228 lba |= ((u64)cdb[5] << 32);
229 lba |= (cdb[6] << 24);
230 lba |= (cdb[7] << 16);
231 lba |= (cdb[8] << 8);
232 lba |= cdb[9];
233 txlen |= (cdb[10] << 24);
234 txlen |= (cdb[11] << 16);
235 txlen |= (cdb[12] << 8);
236 txlen |= cdb[13];
237
238 trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
239 (unsigned long long)lba, (unsigned long long)txlen,
240 cdb[1] >> 5);
241
242 if (cdb[0] == WRITE_SAME_16)
243 trace_seq_printf(p, " unmap=%u", cdb[1] >> 3 & 1);
244
245 trace_seq_putc(p, 0);
246 return ret;
247}
248
249static const char *
250scsi_trace_rw32(struct trace_seq *p, unsigned char *cdb, int len)
251{
252 const char *ret = p->buffer + p->len, *cmd;
253 sector_t lba = 0, txlen = 0;
254 u32 ei_lbrt = 0;
255
256 switch (SERVICE_ACTION32(cdb)) {
257 case READ_32:
258 cmd = "READ";
259 break;
260 case VERIFY_32:
261 cmd = "VERIFY";
262 break;
263 case WRITE_32:
264 cmd = "WRITE";
265 break;
266 case WRITE_SAME_32:
267 cmd = "WRITE_SAME";
268 break;
269 default:
270 trace_seq_printf(p, "UNKNOWN");
271 goto out;
272 }
273
274 lba |= ((u64)cdb[12] << 56);
275 lba |= ((u64)cdb[13] << 48);
276 lba |= ((u64)cdb[14] << 40);
277 lba |= ((u64)cdb[15] << 32);
278 lba |= (cdb[16] << 24);
279 lba |= (cdb[17] << 16);
280 lba |= (cdb[18] << 8);
281 lba |= cdb[19];
282 ei_lbrt |= (cdb[20] << 24);
283 ei_lbrt |= (cdb[21] << 16);
284 ei_lbrt |= (cdb[22] << 8);
285 ei_lbrt |= cdb[23];
286 txlen |= (cdb[28] << 24);
287 txlen |= (cdb[29] << 16);
288 txlen |= (cdb[30] << 8);
289 txlen |= cdb[31];
290
291 trace_seq_printf(p, "%s_32 lba=%llu txlen=%llu protect=%u ei_lbrt=%u",
292 cmd, (unsigned long long)lba,
293 (unsigned long long)txlen, cdb[10] >> 5, ei_lbrt);
294
295 if (SERVICE_ACTION32(cdb) == WRITE_SAME_32)
296 trace_seq_printf(p, " unmap=%u", cdb[10] >> 3 & 1);
297
298out:
299 trace_seq_putc(p, 0);
300 return ret;
301}
302
303static const char *
304scsi_trace_unmap(struct trace_seq *p, unsigned char *cdb, int len)
305{
306 const char *ret = p->buffer + p->len;
307 unsigned int regions = cdb[7] << 8 | cdb[8];
308
309 trace_seq_printf(p, "regions=%u", (regions - 8) / 16);
310 trace_seq_putc(p, 0);
311 return ret;
312}
313
314static const char *
315scsi_trace_service_action_in(struct trace_seq *p, unsigned char *cdb, int len)
316{
317 const char *ret = p->buffer + p->len, *cmd;
318 sector_t lba = 0;
319 u32 alloc_len = 0;
320
321 switch (SERVICE_ACTION16(cdb)) {
322 case SAI_READ_CAPACITY_16:
323 cmd = "READ_CAPACITY_16";
324 break;
325 case SAI_GET_LBA_STATUS:
326 cmd = "GET_LBA_STATUS";
327 break;
328 default:
329 trace_seq_printf(p, "UNKNOWN");
330 goto out;
331 }
332
333 lba |= ((u64)cdb[2] << 56);
334 lba |= ((u64)cdb[3] << 48);
335 lba |= ((u64)cdb[4] << 40);
336 lba |= ((u64)cdb[5] << 32);
337 lba |= (cdb[6] << 24);
338 lba |= (cdb[7] << 16);
339 lba |= (cdb[8] << 8);
340 lba |= cdb[9];
341 alloc_len |= (cdb[10] << 24);
342 alloc_len |= (cdb[11] << 16);
343 alloc_len |= (cdb[12] << 8);
344 alloc_len |= cdb[13];
345
346 trace_seq_printf(p, "%s lba=%llu alloc_len=%u", cmd,
347 (unsigned long long)lba, alloc_len);
348
349out:
350 trace_seq_putc(p, 0);
351 return ret;
352}
353
354static const char *
355scsi_trace_varlen(struct trace_seq *p, unsigned char *cdb, int len)
356{
357 switch (SERVICE_ACTION32(cdb)) {
358 case READ_32:
359 case VERIFY_32:
360 case WRITE_32:
361 case WRITE_SAME_32:
362 return scsi_trace_rw32(p, cdb, len);
363 default:
364 return scsi_trace_misc(p, cdb, len);
365 }
366}
367
368static const char *
369scsi_trace_misc(struct trace_seq *p, unsigned char *cdb, int len)
370{
371 const char *ret = p->buffer + p->len;
372
373 trace_seq_printf(p, "-");
374 trace_seq_putc(p, 0);
375 return ret;
376}
377
378const char *
379scsi_trace_parse_cdb(struct trace_seq *p, unsigned char *cdb, int len)
380{
381 switch (cdb[0]) {
382 case READ_6:
383 case WRITE_6:
384 return scsi_trace_rw6(p, cdb, len);
385 case READ_10:
386 case VERIFY:
387 case WRITE_10:
388 case WRITE_SAME:
389 return scsi_trace_rw10(p, cdb, len);
390 case READ_12:
391 case VERIFY_12:
392 case WRITE_12:
393 return scsi_trace_rw12(p, cdb, len);
394 case READ_16:
395 case VERIFY_16:
396 case WRITE_16:
397 case WRITE_SAME_16:
398 return scsi_trace_rw16(p, cdb, len);
399 case UNMAP:
400 return scsi_trace_unmap(p, cdb, len);
401 case SERVICE_ACTION_IN_16:
402 return scsi_trace_service_action_in(p, cdb, len);
403 case VARIABLE_LENGTH_CMD:
404 return scsi_trace_varlen(p, cdb, len);
405 default:
406 return scsi_trace_misc(p, cdb, len);
407 }
408}
409
410unsigned long long process_scsi_trace_parse_cdb(struct trace_seq *s,
411 unsigned long long *args)
412{
413 scsi_trace_parse_cdb(s, (unsigned char *) (unsigned long) args[1], args[2]);
414 return 0;
415}
416
417int TEP_PLUGIN_LOADER(struct tep_handle *tep)
418{
419 tep_register_print_function(tep,
420 process_scsi_trace_parse_cdb,
421 TEP_FUNC_ARG_STRING,
422 "scsi_trace_parse_cdb",
423 TEP_FUNC_ARG_PTR,
424 TEP_FUNC_ARG_PTR,
425 TEP_FUNC_ARG_INT,
426 TEP_FUNC_ARG_VOID);
427 return 0;
428}
429
430void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
431{
432 tep_unregister_print_function(tep, process_scsi_trace_parse_cdb,
433 "scsi_trace_parse_cdb");
434}