1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2010 FUJITSU LIMITED
4 * Copyright (C) 2010 Tomohiro Kusumi <kusumi.tomohiro@jp.fujitsu.com>
5 */
6 #include <linux/kernel.h>
7 #include <linux/trace_seq.h>
8 #include <asm/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
14 static const char *
15 scsi_trace_misc(struct trace_seq *, unsigned char *, int);
16
17 static const char *
scsi_trace_rw6(struct trace_seq * p,unsigned char * cdb,int len)18 scsi_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
36 static const char *
scsi_trace_rw10(struct trace_seq * p,unsigned char * cdb,int len)37 scsi_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
56 static const char *
scsi_trace_rw12(struct trace_seq * p,unsigned char * cdb,int len)57 scsi_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
72 static const char *
scsi_trace_rw16(struct trace_seq * p,unsigned char * cdb,int len)73 scsi_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
93 static const char *
scsi_trace_rw32(struct trace_seq * p,unsigned char * cdb,int len)94 scsi_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
128 out:
129 trace_seq_putc(p, 0);
130
131 return ret;
132 }
133
134 static const char *
scsi_trace_unmap(struct trace_seq * p,unsigned char * cdb,int len)135 scsi_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
146 static const char *
scsi_trace_service_action_in(struct trace_seq * p,unsigned char * cdb,int len)147 scsi_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
170 out:
171 trace_seq_putc(p, 0);
172
173 return ret;
174 }
175
176 static const char *
scsi_trace_maintenance_in(struct trace_seq * p,unsigned char * cdb,int len)177 scsi_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
216 out:
217 trace_seq_putc(p, 0);
218
219 return ret;
220 }
221
222 static const char *
scsi_trace_maintenance_out(struct trace_seq * p,unsigned char * cdb,int len)223 scsi_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
256 out:
257 trace_seq_putc(p, 0);
258
259 return ret;
260 }
261
262 static const char *
scsi_trace_zbc_in(struct trace_seq * p,unsigned char * cdb,int len)263 scsi_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
287 out:
288 trace_seq_putc(p, 0);
289
290 return ret;
291 }
292
293 static const char *
scsi_trace_zbc_out(struct trace_seq * p,unsigned char * cdb,int len)294 scsi_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
322 out:
323 trace_seq_putc(p, 0);
324
325 return ret;
326 }
327
328 static const char *
scsi_trace_varlen(struct trace_seq * p,unsigned char * cdb,int len)329 scsi_trace_varlen(struct trace_seq *p, unsigned char *cdb, int len)
330 {
331 switch (SERVICE_ACTION32(cdb)) {
332 case READ_32:
333 case VERIFY_32:
334 case WRITE_32:
335 case WRITE_SAME_32:
336 return scsi_trace_rw32(p, cdb, len);
337 default:
338 return scsi_trace_misc(p, cdb, len);
339 }
340 }
341
342 static const char *
scsi_trace_misc(struct trace_seq * p,unsigned char * cdb,int len)343 scsi_trace_misc(struct trace_seq *p, unsigned char *cdb, int len)
344 {
345 const char *ret = trace_seq_buffer_ptr(p);
346
347 trace_seq_putc(p, '-');
348 trace_seq_putc(p, 0);
349
350 return ret;
351 }
352
353 const char *
scsi_trace_parse_cdb(struct trace_seq * p,unsigned char * cdb,int len)354 scsi_trace_parse_cdb(struct trace_seq *p, unsigned char *cdb, int len)
355 {
356 switch (cdb[0]) {
357 case READ_6:
358 case WRITE_6:
359 return scsi_trace_rw6(p, cdb, len);
360 case READ_10:
361 case VERIFY:
362 case WRITE_10:
363 case WRITE_SAME:
364 return scsi_trace_rw10(p, cdb, len);
365 case READ_12:
366 case VERIFY_12:
367 case WRITE_12:
368 return scsi_trace_rw12(p, cdb, len);
369 case READ_16:
370 case VERIFY_16:
371 case WRITE_16:
372 case WRITE_SAME_16:
373 return scsi_trace_rw16(p, cdb, len);
374 case UNMAP:
375 return scsi_trace_unmap(p, cdb, len);
376 case SERVICE_ACTION_IN_16:
377 return scsi_trace_service_action_in(p, cdb, len);
378 case VARIABLE_LENGTH_CMD:
379 return scsi_trace_varlen(p, cdb, len);
380 case MAINTENANCE_IN:
381 return scsi_trace_maintenance_in(p, cdb, len);
382 case MAINTENANCE_OUT:
383 return scsi_trace_maintenance_out(p, cdb, len);
384 case ZBC_IN:
385 return scsi_trace_zbc_in(p, cdb, len);
386 case ZBC_OUT:
387 return scsi_trace_zbc_out(p, cdb, len);
388 default:
389 return scsi_trace_misc(p, cdb, len);
390 }
391 }
392
