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