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55716d26 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
ded85c19 HR |
2 | /* |
3 | * scsi_logging.c | |
4 | * | |
5 | * Copyright (C) 2014 SUSE Linux Products GmbH | |
6 | * Copyright (C) 2014 Hannes Reinecke <hare@suse.de> | |
ded85c19 HR |
7 | */ |
8 | ||
9 | #include <linux/kernel.h> | |
10 | #include <linux/atomic.h> | |
11 | ||
12 | #include <scsi/scsi.h> | |
13 | #include <scsi/scsi_cmnd.h> | |
14 | #include <scsi/scsi_device.h> | |
9e5ed2a5 | 15 | #include <scsi/scsi_eh.h> |
ded85c19 HR |
16 | #include <scsi/scsi_dbg.h> |
17 | ||
ded85c19 HR |
18 | static char *scsi_log_reserve_buffer(size_t *len) |
19 | { | |
dccc96ab BVA |
20 | *len = 128; |
21 | return kmalloc(*len, GFP_ATOMIC); | |
ded85c19 HR |
22 | } |
23 | ||
24 | static void scsi_log_release_buffer(char *bufptr) | |
25 | { | |
dccc96ab | 26 | kfree(bufptr); |
ded85c19 HR |
27 | } |
28 | ||
21045519 HR |
29 | static inline const char *scmd_name(const struct scsi_cmnd *scmd) |
30 | { | |
31 | return scmd->request->rq_disk ? | |
32 | scmd->request->rq_disk->disk_name : NULL; | |
33 | } | |
34 | ||
35 | static size_t sdev_format_header(char *logbuf, size_t logbuf_len, | |
36 | const char *name, int tag) | |
9e5ed2a5 HR |
37 | { |
38 | size_t off = 0; | |
39 | ||
21045519 | 40 | if (name) |
9e5ed2a5 | 41 | off += scnprintf(logbuf + off, logbuf_len - off, |
21045519 | 42 | "[%s] ", name); |
9e5ed2a5 HR |
43 | |
44 | if (WARN_ON(off >= logbuf_len)) | |
45 | return off; | |
46 | ||
47 | if (tag >= 0) | |
48 | off += scnprintf(logbuf + off, logbuf_len - off, | |
49 | "tag#%d ", tag); | |
50 | return off; | |
51 | } | |
52 | ||
9c4a6b1e HR |
53 | void sdev_prefix_printk(const char *level, const struct scsi_device *sdev, |
54 | const char *name, const char *fmt, ...) | |
ded85c19 HR |
55 | { |
56 | va_list args; | |
57 | char *logbuf; | |
58 | size_t off = 0, logbuf_len; | |
ded85c19 HR |
59 | |
60 | if (!sdev) | |
9c4a6b1e | 61 | return; |
ded85c19 HR |
62 | |
63 | logbuf = scsi_log_reserve_buffer(&logbuf_len); | |
64 | if (!logbuf) | |
9c4a6b1e | 65 | return; |
ded85c19 HR |
66 | |
67 | if (name) | |
68 | off += scnprintf(logbuf + off, logbuf_len - off, | |
69 | "[%s] ", name); | |
9e5ed2a5 HR |
70 | if (!WARN_ON(off >= logbuf_len)) { |
71 | va_start(args, fmt); | |
72 | off += vscnprintf(logbuf + off, logbuf_len - off, fmt, args); | |
73 | va_end(args); | |
74 | } | |
9c4a6b1e | 75 | dev_printk(level, &sdev->sdev_gendev, "%s", logbuf); |
ded85c19 | 76 | scsi_log_release_buffer(logbuf); |
ded85c19 HR |
77 | } |
78 | EXPORT_SYMBOL(sdev_prefix_printk); | |
79 | ||
9c4a6b1e | 80 | void scmd_printk(const char *level, const struct scsi_cmnd *scmd, |
ded85c19 HR |
81 | const char *fmt, ...) |
82 | { | |
ded85c19 HR |
83 | va_list args; |
84 | char *logbuf; | |
85 | size_t off = 0, logbuf_len; | |
ded85c19 HR |
86 | |
87 | if (!scmd || !scmd->cmnd) | |
9c4a6b1e | 88 | return; |
ded85c19 HR |
89 | |
90 | logbuf = scsi_log_reserve_buffer(&logbuf_len); | |
91 | if (!logbuf) | |
9c4a6b1e | 92 | return; |
21045519 | 93 | off = sdev_format_header(logbuf, logbuf_len, scmd_name(scmd), |
9e5ed2a5 HR |
94 | scmd->request->tag); |
95 | if (off < logbuf_len) { | |
96 | va_start(args, fmt); | |
97 | off += vscnprintf(logbuf + off, logbuf_len - off, fmt, args); | |
98 | va_end(args); | |
99 | } | |
9c4a6b1e | 100 | dev_printk(level, &scmd->device->sdev_gendev, "%s", logbuf); |
ded85c19 | 101 | scsi_log_release_buffer(logbuf); |
ded85c19 HR |
102 | } |
103 | EXPORT_SYMBOL(scmd_printk); | |
9e5ed2a5 HR |
104 | |
105 | static size_t scsi_format_opcode_name(char *buffer, size_t buf_len, | |
106 | const unsigned char *cdbp) | |
107 | { | |
108 | int sa, cdb0; | |
109 | const char *cdb_name = NULL, *sa_name = NULL; | |
110 | size_t off; | |
111 | ||
112 | cdb0 = cdbp[0]; | |
113 | if (cdb0 == VARIABLE_LENGTH_CMD) { | |
114 | int len = scsi_varlen_cdb_length(cdbp); | |
115 | ||
116 | if (len < 10) { | |
117 | off = scnprintf(buffer, buf_len, | |
118 | "short variable length command, len=%d", | |
119 | len); | |
120 | return off; | |
121 | } | |
122 | sa = (cdbp[8] << 8) + cdbp[9]; | |
123 | } else | |
124 | sa = cdbp[1] & 0x1f; | |
125 | ||
126 | if (!scsi_opcode_sa_name(cdb0, sa, &cdb_name, &sa_name)) { | |
127 | if (cdb_name) | |
128 | off = scnprintf(buffer, buf_len, "%s", cdb_name); | |
129 | else { | |
130 | off = scnprintf(buffer, buf_len, "opcode=0x%x", cdb0); | |
131 | if (WARN_ON(off >= buf_len)) | |
132 | return off; | |
133 | if (cdb0 >= VENDOR_SPECIFIC_CDB) | |
134 | off += scnprintf(buffer + off, buf_len - off, | |
135 | " (vendor)"); | |
136 | else if (cdb0 >= 0x60 && cdb0 < 0x7e) | |
137 | off += scnprintf(buffer + off, buf_len - off, | |
138 | " (reserved)"); | |
139 | } | |
140 | } else { | |
141 | if (sa_name) | |
142 | off = scnprintf(buffer, buf_len, "%s", sa_name); | |
143 | else if (cdb_name) | |
144 | off = scnprintf(buffer, buf_len, "%s, sa=0x%x", | |
145 | cdb_name, sa); | |
146 | else | |
147 | off = scnprintf(buffer, buf_len, | |
148 | "opcode=0x%x, sa=0x%x", cdb0, sa); | |
149 | } | |
150 | WARN_ON(off >= buf_len); | |
151 | return off; | |
152 | } | |
153 | ||
154 | size_t __scsi_format_command(char *logbuf, size_t logbuf_len, | |
155 | const unsigned char *cdb, size_t cdb_len) | |
156 | { | |
157 | int len, k; | |
158 | size_t off; | |
159 | ||
160 | off = scsi_format_opcode_name(logbuf, logbuf_len, cdb); | |
161 | if (off >= logbuf_len) | |
162 | return off; | |
163 | len = scsi_command_size(cdb); | |
164 | if (cdb_len < len) | |
165 | len = cdb_len; | |
166 | /* print out all bytes in cdb */ | |
167 | for (k = 0; k < len; ++k) { | |
168 | if (off > logbuf_len - 3) | |
169 | break; | |
170 | off += scnprintf(logbuf + off, logbuf_len - off, | |
171 | " %02x", cdb[k]); | |
172 | } | |
173 | return off; | |
174 | } | |
175 | EXPORT_SYMBOL(__scsi_format_command); | |
176 | ||
177 | void scsi_print_command(struct scsi_cmnd *cmd) | |
178 | { | |
9e5ed2a5 HR |
179 | int k; |
180 | char *logbuf; | |
181 | size_t off, logbuf_len; | |
182 | ||
183 | if (!cmd->cmnd) | |
184 | return; | |
185 | ||
186 | logbuf = scsi_log_reserve_buffer(&logbuf_len); | |
187 | if (!logbuf) | |
188 | return; | |
189 | ||
21045519 HR |
190 | off = sdev_format_header(logbuf, logbuf_len, |
191 | scmd_name(cmd), cmd->request->tag); | |
9e5ed2a5 HR |
192 | if (off >= logbuf_len) |
193 | goto out_printk; | |
194 | off += scnprintf(logbuf + off, logbuf_len - off, "CDB: "); | |
195 | if (WARN_ON(off >= logbuf_len)) | |
196 | goto out_printk; | |
197 | ||
198 | off += scsi_format_opcode_name(logbuf + off, logbuf_len - off, | |
199 | cmd->cmnd); | |
200 | if (off >= logbuf_len) | |
201 | goto out_printk; | |
202 | ||
203 | /* print out all bytes in cdb */ | |
204 | if (cmd->cmd_len > 16) { | |
205 | /* Print opcode in one line and use separate lines for CDB */ | |
206 | off += scnprintf(logbuf + off, logbuf_len - off, "\n"); | |
2fc583c4 | 207 | dev_printk(KERN_INFO, &cmd->device->sdev_gendev, "%s", logbuf); |
9e5ed2a5 HR |
208 | for (k = 0; k < cmd->cmd_len; k += 16) { |
209 | size_t linelen = min(cmd->cmd_len - k, 16); | |
210 | ||
21045519 HR |
211 | off = sdev_format_header(logbuf, logbuf_len, |
212 | scmd_name(cmd), | |
9e5ed2a5 HR |
213 | cmd->request->tag); |
214 | if (!WARN_ON(off > logbuf_len - 58)) { | |
215 | off += scnprintf(logbuf + off, logbuf_len - off, | |
216 | "CDB[%02x]: ", k); | |
217 | hex_dump_to_buffer(&cmd->cmnd[k], linelen, | |
218 | 16, 1, logbuf + off, | |
219 | logbuf_len - off, false); | |
220 | } | |
2fc583c4 | 221 | dev_printk(KERN_INFO, &cmd->device->sdev_gendev, "%s", |
9e5ed2a5 | 222 | logbuf); |
9e5ed2a5 | 223 | } |
811f3947 | 224 | goto out; |
9e5ed2a5 HR |
225 | } |
226 | if (!WARN_ON(off > logbuf_len - 49)) { | |
227 | off += scnprintf(logbuf + off, logbuf_len - off, " "); | |
228 | hex_dump_to_buffer(cmd->cmnd, cmd->cmd_len, 16, 1, | |
229 | logbuf + off, logbuf_len - off, | |
230 | false); | |
231 | } | |
232 | out_printk: | |
2fc583c4 | 233 | dev_printk(KERN_INFO, &cmd->device->sdev_gendev, "%s", logbuf); |
811f3947 | 234 | out: |
9e5ed2a5 HR |
235 | scsi_log_release_buffer(logbuf); |
236 | } | |
237 | EXPORT_SYMBOL(scsi_print_command); | |
21045519 HR |
238 | |
239 | static size_t | |
240 | scsi_format_extd_sense(char *buffer, size_t buf_len, | |
241 | unsigned char asc, unsigned char ascq) | |
242 | { | |
243 | size_t off = 0; | |
244 | const char *extd_sense_fmt = NULL; | |
245 | const char *extd_sense_str = scsi_extd_sense_format(asc, ascq, | |
246 | &extd_sense_fmt); | |
247 | ||
248 | if (extd_sense_str) { | |
249 | off = scnprintf(buffer, buf_len, "Add. Sense: %s", | |
250 | extd_sense_str); | |
251 | if (extd_sense_fmt) | |
252 | off += scnprintf(buffer + off, buf_len - off, | |
253 | "(%s%x)", extd_sense_fmt, ascq); | |
254 | } else { | |
255 | if (asc >= 0x80) | |
256 | off = scnprintf(buffer, buf_len, "<<vendor>>"); | |
257 | off += scnprintf(buffer + off, buf_len - off, | |
258 | "ASC=0x%x ", asc); | |
259 | if (ascq >= 0x80) | |
260 | off += scnprintf(buffer + off, buf_len - off, | |
261 | "<<vendor>>"); | |
262 | off += scnprintf(buffer + off, buf_len - off, | |
263 | "ASCQ=0x%x ", ascq); | |
264 | } | |
265 | return off; | |
266 | } | |
267 | ||
268 | static size_t | |
269 | scsi_format_sense_hdr(char *buffer, size_t buf_len, | |
270 | const struct scsi_sense_hdr *sshdr) | |
271 | { | |
272 | const char *sense_txt; | |
273 | size_t off; | |
274 | ||
275 | off = scnprintf(buffer, buf_len, "Sense Key : "); | |
276 | sense_txt = scsi_sense_key_string(sshdr->sense_key); | |
277 | if (sense_txt) | |
278 | off += scnprintf(buffer + off, buf_len - off, | |
279 | "%s ", sense_txt); | |
280 | else | |
281 | off += scnprintf(buffer + off, buf_len - off, | |
282 | "0x%x ", sshdr->sense_key); | |
283 | off += scnprintf(buffer + off, buf_len - off, | |
284 | scsi_sense_is_deferred(sshdr) ? "[deferred] " : "[current] "); | |
285 | ||
286 | if (sshdr->response_code >= 0x72) | |
287 | off += scnprintf(buffer + off, buf_len - off, "[descriptor] "); | |
288 | return off; | |
289 | } | |
290 | ||
291 | static void | |
292 | scsi_log_dump_sense(const struct scsi_device *sdev, const char *name, int tag, | |
293 | const unsigned char *sense_buffer, int sense_len) | |
294 | { | |
295 | char *logbuf; | |
296 | size_t logbuf_len; | |
297 | int i; | |
298 | ||
299 | logbuf = scsi_log_reserve_buffer(&logbuf_len); | |
300 | if (!logbuf) | |
301 | return; | |
302 | ||
303 | for (i = 0; i < sense_len; i += 16) { | |
304 | int len = min(sense_len - i, 16); | |
305 | size_t off; | |
306 | ||
307 | off = sdev_format_header(logbuf, logbuf_len, | |
308 | name, tag); | |
309 | hex_dump_to_buffer(&sense_buffer[i], len, 16, 1, | |
310 | logbuf + off, logbuf_len - off, | |
311 | false); | |
2fc583c4 | 312 | dev_printk(KERN_INFO, &sdev->sdev_gendev, "%s", logbuf); |
21045519 HR |
313 | } |
314 | scsi_log_release_buffer(logbuf); | |
315 | } | |
316 | ||
317 | static void | |
318 | scsi_log_print_sense_hdr(const struct scsi_device *sdev, const char *name, | |
319 | int tag, const struct scsi_sense_hdr *sshdr) | |
320 | { | |
321 | char *logbuf; | |
322 | size_t off, logbuf_len; | |
323 | ||
324 | logbuf = scsi_log_reserve_buffer(&logbuf_len); | |
325 | if (!logbuf) | |
326 | return; | |
327 | off = sdev_format_header(logbuf, logbuf_len, name, tag); | |
328 | off += scsi_format_sense_hdr(logbuf + off, logbuf_len - off, sshdr); | |
2fc583c4 | 329 | dev_printk(KERN_INFO, &sdev->sdev_gendev, "%s", logbuf); |
21045519 HR |
330 | scsi_log_release_buffer(logbuf); |
331 | ||
332 | logbuf = scsi_log_reserve_buffer(&logbuf_len); | |
333 | if (!logbuf) | |
334 | return; | |
335 | off = sdev_format_header(logbuf, logbuf_len, name, tag); | |
336 | off += scsi_format_extd_sense(logbuf + off, logbuf_len - off, | |
337 | sshdr->asc, sshdr->ascq); | |
2fc583c4 | 338 | dev_printk(KERN_INFO, &sdev->sdev_gendev, "%s", logbuf); |
21045519 HR |
339 | scsi_log_release_buffer(logbuf); |
340 | } | |
341 | ||
342 | static void | |
343 | scsi_log_print_sense(const struct scsi_device *sdev, const char *name, int tag, | |
344 | const unsigned char *sense_buffer, int sense_len) | |
345 | { | |
346 | struct scsi_sense_hdr sshdr; | |
347 | ||
348 | if (scsi_normalize_sense(sense_buffer, sense_len, &sshdr)) | |
349 | scsi_log_print_sense_hdr(sdev, name, tag, &sshdr); | |
350 | else | |
351 | scsi_log_dump_sense(sdev, name, tag, sense_buffer, sense_len); | |
352 | } | |
353 | ||
354 | /* | |
355 | * Print normalized SCSI sense header with a prefix. | |
356 | */ | |
357 | void | |
358 | scsi_print_sense_hdr(const struct scsi_device *sdev, const char *name, | |
359 | const struct scsi_sense_hdr *sshdr) | |
360 | { | |
361 | scsi_log_print_sense_hdr(sdev, name, -1, sshdr); | |
362 | } | |
363 | EXPORT_SYMBOL(scsi_print_sense_hdr); | |
364 | ||
365 | /* Normalize and print sense buffer with name prefix */ | |
366 | void __scsi_print_sense(const struct scsi_device *sdev, const char *name, | |
367 | const unsigned char *sense_buffer, int sense_len) | |
368 | { | |
369 | scsi_log_print_sense(sdev, name, -1, sense_buffer, sense_len); | |
370 | } | |
371 | EXPORT_SYMBOL(__scsi_print_sense); | |
372 | ||
373 | /* Normalize and print sense buffer in SCSI command */ | |
374 | void scsi_print_sense(const struct scsi_cmnd *cmd) | |
375 | { | |
376 | scsi_log_print_sense(cmd->device, scmd_name(cmd), cmd->request->tag, | |
377 | cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); | |
378 | } | |
379 | EXPORT_SYMBOL(scsi_print_sense); | |
026f8da8 HR |
380 | |
381 | void scsi_print_result(const struct scsi_cmnd *cmd, const char *msg, | |
382 | int disposition) | |
383 | { | |
384 | char *logbuf; | |
385 | size_t off, logbuf_len; | |
386 | const char *mlret_string = scsi_mlreturn_string(disposition); | |
387 | const char *hb_string = scsi_hostbyte_string(cmd->result); | |
388 | const char *db_string = scsi_driverbyte_string(cmd->result); | |
8ee132b3 | 389 | unsigned long cmd_age = (jiffies - cmd->jiffies_at_alloc) / HZ; |
026f8da8 HR |
390 | |
391 | logbuf = scsi_log_reserve_buffer(&logbuf_len); | |
392 | if (!logbuf) | |
393 | return; | |
394 | ||
395 | off = sdev_format_header(logbuf, logbuf_len, | |
396 | scmd_name(cmd), cmd->request->tag); | |
397 | ||
398 | if (off >= logbuf_len) | |
399 | goto out_printk; | |
400 | ||
401 | if (msg) { | |
402 | off += scnprintf(logbuf + off, logbuf_len - off, | |
403 | "%s: ", msg); | |
404 | if (WARN_ON(off >= logbuf_len)) | |
405 | goto out_printk; | |
406 | } | |
407 | if (mlret_string) | |
408 | off += scnprintf(logbuf + off, logbuf_len - off, | |
409 | "%s ", mlret_string); | |
410 | else | |
411 | off += scnprintf(logbuf + off, logbuf_len - off, | |
412 | "UNKNOWN(0x%02x) ", disposition); | |
413 | if (WARN_ON(off >= logbuf_len)) | |
414 | goto out_printk; | |
415 | ||
416 | off += scnprintf(logbuf + off, logbuf_len - off, "Result: "); | |
417 | if (WARN_ON(off >= logbuf_len)) | |
418 | goto out_printk; | |
419 | ||
420 | if (hb_string) | |
421 | off += scnprintf(logbuf + off, logbuf_len - off, | |
422 | "hostbyte=%s ", hb_string); | |
423 | else | |
424 | off += scnprintf(logbuf + off, logbuf_len - off, | |
425 | "hostbyte=0x%02x ", host_byte(cmd->result)); | |
426 | if (WARN_ON(off >= logbuf_len)) | |
427 | goto out_printk; | |
428 | ||
429 | if (db_string) | |
430 | off += scnprintf(logbuf + off, logbuf_len - off, | |
8ee132b3 | 431 | "driverbyte=%s ", db_string); |
026f8da8 HR |
432 | else |
433 | off += scnprintf(logbuf + off, logbuf_len - off, | |
8ee132b3 MG |
434 | "driverbyte=0x%02x ", |
435 | driver_byte(cmd->result)); | |
436 | ||
437 | off += scnprintf(logbuf + off, logbuf_len - off, | |
438 | "cmd_age=%lus", cmd_age); | |
439 | ||
026f8da8 | 440 | out_printk: |
2fc583c4 | 441 | dev_printk(KERN_INFO, &cmd->device->sdev_gendev, "%s", logbuf); |
026f8da8 HR |
442 | scsi_log_release_buffer(logbuf); |
443 | } | |
444 | EXPORT_SYMBOL(scsi_print_result); |