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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2010 FUJITSU LIMITED
4 * Copyright (C) 2010 Tomohiro Kusumi <[email protected]>
5 */
6#include <linux/kernel.h>
7#include <linux/trace_seq.h>
8#include <linux/unaligned.h>
9#include <trace/events/scsi.h>
10
11#define SERVICE_ACTION16(cdb) (cdb[1] & 0x1f)
12#define SERVICE_ACTION32(cdb) (get_unaligned_be16(&cdb[8]))
13
14static const char *
15scsi_trace_misc(struct trace_seq *, unsigned char *, int);
16
17static const char *
18scsi_trace_rw6(struct trace_seq *p, unsigned char *cdb, int len)
19{
20 const char *ret = trace_seq_buffer_ptr(p);
21 u32 lba, txlen;
22
23 lba = get_unaligned_be24(&cdb[1]) & 0x1fffff;
24 /*
25 * From SBC-2: a TRANSFER LENGTH field set to zero specifies that 256
26 * logical blocks shall be read (READ(6)) or written (WRITE(6)).
27 */
28 txlen = cdb[4] ? cdb[4] : 256;
29
30 trace_seq_printf(p, "lba=%u txlen=%u", lba, txlen);
31 trace_seq_putc(p, 0);
32
33 return ret;
34}
35
36static const char *
37scsi_trace_rw10(struct trace_seq *p, unsigned char *cdb, int len)
38{
39 const char *ret = trace_seq_buffer_ptr(p);
40 u32 lba, txlen;
41
42 lba = get_unaligned_be32(&cdb[2]);
43 txlen = get_unaligned_be16(&cdb[7]);
44
45 trace_seq_printf(p, "lba=%u txlen=%u protect=%u", lba, txlen,
46 cdb[1] >> 5);
47
48 if (cdb[0] == WRITE_SAME)
49 trace_seq_printf(p, " unmap=%u", cdb[1] >> 3 & 1);
50
51 trace_seq_putc(p, 0);
52
53 return ret;
54}
55
56static const char *
57scsi_trace_rw12(struct trace_seq *p, unsigned char *cdb, int len)
58{
59 const char *ret = trace_seq_buffer_ptr(p);
60 u32 lba, txlen;
61
62 lba = get_unaligned_be32(&cdb[2]);
63 txlen = get_unaligned_be32(&cdb[6]);
64
65 trace_seq_printf(p, "lba=%u txlen=%u protect=%u", lba, txlen,
66 cdb[1] >> 5);
67 trace_seq_putc(p, 0);
68
69 return ret;
70}
71
72static const char *
73scsi_trace_rw16(struct trace_seq *p, unsigned char *cdb, int len)
74{
75 const char *ret = trace_seq_buffer_ptr(p);
76 u64 lba;
77 u32 txlen;
78
79 lba = get_unaligned_be64(&cdb[2]);
80 txlen = get_unaligned_be32(&cdb[10]);
81
82 trace_seq_printf(p, "lba=%llu txlen=%u protect=%u", lba, txlen,
83 cdb[1] >> 5);
84
85 if (cdb[0] == WRITE_SAME_16)
86 trace_seq_printf(p, " unmap=%u", cdb[1] >> 3 & 1);
87
88 trace_seq_putc(p, 0);
89
90 return ret;
91}
92
93static const char *
94scsi_trace_rw32(struct trace_seq *p, unsigned char *cdb, int len)
95{
96 const char *ret = trace_seq_buffer_ptr(p), *cmd;
97 u64 lba;
98 u32 ei_lbrt, txlen;
99
100 switch (SERVICE_ACTION32(cdb)) {
101 case READ_32:
102 cmd = "READ";
103 break;
104 case VERIFY_32:
105 cmd = "VERIFY";
106 break;
107 case WRITE_32:
108 cmd = "WRITE";
109 break;
110 case WRITE_SAME_32:
111 cmd = "WRITE_SAME";
112 break;
113 default:
114 trace_seq_puts(p, "UNKNOWN");
115 goto out;
116 }
117
118 lba = get_unaligned_be64(&cdb[12]);
119 ei_lbrt = get_unaligned_be32(&cdb[20]);
120 txlen = get_unaligned_be32(&cdb[28]);
121
122 trace_seq_printf(p, "%s_32 lba=%llu txlen=%u protect=%u ei_lbrt=%u",
123 cmd, lba, txlen, cdb[10] >> 5, ei_lbrt);
124
125 if (SERVICE_ACTION32(cdb) == WRITE_SAME_32)
126 trace_seq_printf(p, " unmap=%u", cdb[10] >> 3 & 1);
127
128out:
129 trace_seq_putc(p, 0);
130
131 return ret;
132}
133
134static const char *
135scsi_trace_unmap(struct trace_seq *p, unsigned char *cdb, int len)
136{
137 const char *ret = trace_seq_buffer_ptr(p);
138 unsigned int regions = get_unaligned_be16(&cdb[7]);
139
140 trace_seq_printf(p, "regions=%u", (regions - 8) / 16);
141 trace_seq_putc(p, 0);
142
143 return ret;
144}
145
146static const char *
147scsi_trace_service_action_in(struct trace_seq *p, unsigned char *cdb, int len)
148{
149 const char *ret = trace_seq_buffer_ptr(p), *cmd;
150 u64 lba;
151 u32 alloc_len;
152
153 switch (SERVICE_ACTION16(cdb)) {
154 case SAI_READ_CAPACITY_16:
155 cmd = "READ_CAPACITY_16";
156 break;
157 case SAI_GET_LBA_STATUS:
158 cmd = "GET_LBA_STATUS";
159 break;
160 default:
161 trace_seq_puts(p, "UNKNOWN");
162 goto out;
163 }
164
165 lba = get_unaligned_be64(&cdb[2]);
166 alloc_len = get_unaligned_be32(&cdb[10]);
167
168 trace_seq_printf(p, "%s lba=%llu alloc_len=%u", cmd, lba, alloc_len);
169
170out:
171 trace_seq_putc(p, 0);
172
173 return ret;
174}
175
176static const char *
177scsi_trace_maintenance_in(struct trace_seq *p, unsigned char *cdb, int len)
178{
179 const char *ret = trace_seq_buffer_ptr(p), *cmd;
180 u32 alloc_len;
181
182 switch (SERVICE_ACTION16(cdb)) {
183 case MI_REPORT_IDENTIFYING_INFORMATION:
184 cmd = "REPORT_IDENTIFYING_INFORMATION";
185 break;
186 case MI_REPORT_TARGET_PGS:
187 cmd = "REPORT_TARGET_PORT_GROUPS";
188 break;
189 case MI_REPORT_ALIASES:
190 cmd = "REPORT_ALIASES";
191 break;
192 case MI_REPORT_SUPPORTED_OPERATION_CODES:
193 cmd = "REPORT_SUPPORTED_OPERATION_CODES";
194 break;
195 case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS:
196 cmd = "REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS";
197 break;
198 case MI_REPORT_PRIORITY:
199 cmd = "REPORT_PRIORITY";
200 break;
201 case MI_REPORT_TIMESTAMP:
202 cmd = "REPORT_TIMESTAMP";
203 break;
204 case MI_MANAGEMENT_PROTOCOL_IN:
205 cmd = "MANAGEMENT_PROTOCOL_IN";
206 break;
207 default:
208 trace_seq_puts(p, "UNKNOWN");
209 goto out;
210 }
211
212 alloc_len = get_unaligned_be32(&cdb[6]);
213
214 trace_seq_printf(p, "%s alloc_len=%u", cmd, alloc_len);
215
216out:
217 trace_seq_putc(p, 0);
218
219 return ret;
220}
221
222static const char *
223scsi_trace_maintenance_out(struct trace_seq *p, unsigned char *cdb, int len)
224{
225 const char *ret = trace_seq_buffer_ptr(p), *cmd;
226 u32 alloc_len;
227
228 switch (SERVICE_ACTION16(cdb)) {
229 case MO_SET_IDENTIFYING_INFORMATION:
230 cmd = "SET_IDENTIFYING_INFORMATION";
231 break;
232 case MO_SET_TARGET_PGS:
233 cmd = "SET_TARGET_PORT_GROUPS";
234 break;
235 case MO_CHANGE_ALIASES:
236 cmd = "CHANGE_ALIASES";
237 break;
238 case MO_SET_PRIORITY:
239 cmd = "SET_PRIORITY";
240 break;
241 case MO_SET_TIMESTAMP:
242 cmd = "SET_TIMESTAMP";
243 break;
244 case MO_MANAGEMENT_PROTOCOL_OUT:
245 cmd = "MANAGEMENT_PROTOCOL_OUT";
246 break;
247 default:
248 trace_seq_puts(p, "UNKNOWN");
249 goto out;
250 }
251
252 alloc_len = get_unaligned_be32(&cdb[6]);
253
254 trace_seq_printf(p, "%s alloc_len=%u", cmd, alloc_len);
255
256out:
257 trace_seq_putc(p, 0);
258
259 return ret;
260}
261
262static const char *
263scsi_trace_zbc_in(struct trace_seq *p, unsigned char *cdb, int len)
264{
265 const char *ret = trace_seq_buffer_ptr(p), *cmd;
266 u64 zone_id;
267 u32 alloc_len;
268 u8 options;
269
270 switch (SERVICE_ACTION16(cdb)) {
271 case ZI_REPORT_ZONES:
272 cmd = "REPORT_ZONES";
273 break;
274 default:
275 trace_seq_puts(p, "UNKNOWN");
276 goto out;
277 }
278
279 zone_id = get_unaligned_be64(&cdb[2]);
280 alloc_len = get_unaligned_be32(&cdb[10]);
281 options = cdb[14] & 0x3f;
282
283 trace_seq_printf(p, "%s zone=%llu alloc_len=%u options=%u partial=%u",
284 cmd, (unsigned long long)zone_id, alloc_len,
285 options, (cdb[14] >> 7) & 1);
286
287out:
288 trace_seq_putc(p, 0);
289
290 return ret;
291}
292
293static const char *
294scsi_trace_zbc_out(struct trace_seq *p, unsigned char *cdb, int len)
295{
296 const char *ret = trace_seq_buffer_ptr(p), *cmd;
297 u64 zone_id;
298
299 switch (SERVICE_ACTION16(cdb)) {
300 case ZO_CLOSE_ZONE:
301 cmd = "CLOSE_ZONE";
302 break;
303 case ZO_FINISH_ZONE:
304 cmd = "FINISH_ZONE";
305 break;
306 case ZO_OPEN_ZONE:
307 cmd = "OPEN_ZONE";
308 break;
309 case ZO_RESET_WRITE_POINTER:
310 cmd = "RESET_WRITE_POINTER";
311 break;
312 default:
313 trace_seq_puts(p, "UNKNOWN");
314 goto out;
315 }
316
317 zone_id = get_unaligned_be64(&cdb[2]);
318
319 trace_seq_printf(p, "%s zone=%llu all=%u", cmd,
320 (unsigned long long)zone_id, cdb[14] & 1);
321
322out:
323 trace_seq_putc(p, 0);
324
325 return ret;
326}
327
328static const char *
329scsi_trace_atomic_write16_out(struct trace_seq *p, unsigned char *cdb, int len)
330{
331 const char *ret = trace_seq_buffer_ptr(p);
332 unsigned int boundary_size;
333 unsigned int nr_blocks;
334 sector_t lba;
335
336 lba = get_unaligned_be64(&cdb[2]);
337 boundary_size = get_unaligned_be16(&cdb[10]);
338 nr_blocks = get_unaligned_be16(&cdb[12]);
339
340 trace_seq_printf(p, "lba=%llu txlen=%u boundary_size=%u",
341 lba, nr_blocks, boundary_size);
342
343 trace_seq_putc(p, 0);
344
345 return ret;
346}
347
348static const char *
349scsi_trace_varlen(struct trace_seq *p, unsigned char *cdb, int len)
350{
351 switch (SERVICE_ACTION32(cdb)) {
352 case READ_32:
353 case VERIFY_32:
354 case WRITE_32:
355 case WRITE_SAME_32:
356 return scsi_trace_rw32(p, cdb, len);
357 default:
358 return scsi_trace_misc(p, cdb, len);
359 }
360}
361
362static const char *
363scsi_trace_misc(struct trace_seq *p, unsigned char *cdb, int len)
364{
365 const char *ret = trace_seq_buffer_ptr(p);
366
367 trace_seq_putc(p, '-');
368 trace_seq_putc(p, 0);
369
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_16:
397 return scsi_trace_service_action_in(p, cdb, len);
398 case VARIABLE_LENGTH_CMD:
399 return scsi_trace_varlen(p, cdb, len);
400 case MAINTENANCE_IN:
401 return scsi_trace_maintenance_in(p, cdb, len);
402 case MAINTENANCE_OUT:
403 return scsi_trace_maintenance_out(p, cdb, len);
404 case ZBC_IN:
405 return scsi_trace_zbc_in(p, cdb, len);
406 case ZBC_OUT:
407 return scsi_trace_zbc_out(p, cdb, len);
408 case WRITE_ATOMIC_16:
409 return scsi_trace_atomic_write16_out(p, cdb, len);
410 default:
411 return scsi_trace_misc(p, cdb, len);
412 }
413}