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