1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * sd.c Copyright (C) 1992 Drew Eckhardt |
4 | * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale |
5 | * |
6 | * Linux scsi disk driver |
7 | * Initial versions: Drew Eckhardt |
8 | * Subsequent revisions: Eric Youngdale |
9 | * Modification history: |
10 | * - Drew Eckhardt <drew@colorado.edu> original |
11 | * - Eric Youngdale <eric@andante.org> add scatter-gather, multiple |
12 | * outstanding request, and other enhancements. |
13 | * Support loadable low-level scsi drivers. |
14 | * - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using |
15 | * eight major numbers. |
16 | * - Richard Gooch <rgooch@atnf.csiro.au> support devfs. |
17 | * - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in |
18 | * sd_init and cleanups. |
19 | * - Alex Davis <letmein@erols.com> Fix problem where partition info |
20 | * not being read in sd_open. Fix problem where removable media |
21 | * could be ejected after sd_open. |
22 | * - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x |
23 | * - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox |
24 | * <willy@debian.org>, Kurt Garloff <garloff@suse.de>: |
25 | * Support 32k/1M disks. |
26 | * |
27 | * Logging policy (needs CONFIG_SCSI_LOGGING defined): |
28 | * - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2 |
29 | * - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1 |
30 | * - entering sd_ioctl: SCSI_LOG_IOCTL level 1 |
31 | * - entering other commands: SCSI_LOG_HLQUEUE level 3 |
32 | * Note: when the logging level is set by the user, it must be greater |
33 | * than the level indicated above to trigger output. |
34 | */ |
35 | |
36 | #include <linux/module.h> |
37 | #include <linux/fs.h> |
38 | #include <linux/kernel.h> |
39 | #include <linux/mm.h> |
40 | #include <linux/bio.h> |
41 | #include <linux/hdreg.h> |
42 | #include <linux/errno.h> |
43 | #include <linux/idr.h> |
44 | #include <linux/interrupt.h> |
45 | #include <linux/init.h> |
46 | #include <linux/blkdev.h> |
47 | #include <linux/blkpg.h> |
48 | #include <linux/blk-pm.h> |
49 | #include <linux/delay.h> |
50 | #include <linux/major.h> |
51 | #include <linux/mutex.h> |
52 | #include <linux/string_helpers.h> |
53 | #include <linux/slab.h> |
54 | #include <linux/sed-opal.h> |
55 | #include <linux/pm_runtime.h> |
56 | #include <linux/pr.h> |
57 | #include <linux/t10-pi.h> |
58 | #include <linux/uaccess.h> |
59 | #include <asm/unaligned.h> |
60 | |
61 | #include <scsi/scsi.h> |
62 | #include <scsi/scsi_cmnd.h> |
63 | #include <scsi/scsi_dbg.h> |
64 | #include <scsi/scsi_device.h> |
65 | #include <scsi/scsi_driver.h> |
66 | #include <scsi/scsi_eh.h> |
67 | #include <scsi/scsi_host.h> |
68 | #include <scsi/scsi_ioctl.h> |
69 | #include <scsi/scsicam.h> |
70 | #include <scsi/scsi_common.h> |
71 | |
72 | #include "sd.h" |
73 | #include "scsi_priv.h" |
74 | #include "scsi_logging.h" |
75 | |
76 | MODULE_AUTHOR("Eric Youngdale" ); |
77 | MODULE_DESCRIPTION("SCSI disk (sd) driver" ); |
78 | MODULE_LICENSE("GPL" ); |
79 | |
80 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR); |
81 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR); |
82 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR); |
83 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR); |
84 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR); |
85 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR); |
86 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR); |
87 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR); |
88 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR); |
89 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR); |
90 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR); |
91 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR); |
92 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR); |
93 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR); |
94 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR); |
95 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); |
96 | MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); |
97 | MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); |
98 | MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); |
99 | MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC); |
100 | |
101 | #define SD_MINORS 16 |
102 | |
103 | static void sd_config_discard(struct scsi_disk *, unsigned int); |
104 | static void sd_config_write_same(struct scsi_disk *); |
105 | static int sd_revalidate_disk(struct gendisk *); |
106 | static void sd_unlock_native_capacity(struct gendisk *disk); |
107 | static void sd_shutdown(struct device *); |
108 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); |
109 | static void scsi_disk_release(struct device *cdev); |
110 | |
111 | static DEFINE_IDA(sd_index_ida); |
112 | |
113 | static mempool_t *sd_page_pool; |
114 | static struct lock_class_key sd_bio_compl_lkclass; |
115 | |
116 | static const char *sd_cache_types[] = { |
117 | "write through" , "none" , "write back" , |
118 | "write back, no read (daft)" |
119 | }; |
120 | |
121 | static void sd_set_flush_flag(struct scsi_disk *sdkp) |
122 | { |
123 | bool wc = false, fua = false; |
124 | |
125 | if (sdkp->WCE) { |
126 | wc = true; |
127 | if (sdkp->DPOFUA) |
128 | fua = true; |
129 | } |
130 | |
131 | blk_queue_write_cache(q: sdkp->disk->queue, enabled: wc, fua); |
132 | } |
133 | |
134 | static ssize_t |
135 | cache_type_store(struct device *dev, struct device_attribute *attr, |
136 | const char *buf, size_t count) |
137 | { |
138 | int ct, rcd, wce, sp; |
139 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
140 | struct scsi_device *sdp = sdkp->device; |
141 | char buffer[64]; |
142 | char *buffer_data; |
143 | struct scsi_mode_data data; |
144 | struct scsi_sense_hdr sshdr; |
145 | static const char temp[] = "temporary " ; |
146 | int len, ret; |
147 | |
148 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
149 | /* no cache control on RBC devices; theoretically they |
150 | * can do it, but there's probably so many exceptions |
151 | * it's not worth the risk */ |
152 | return -EINVAL; |
153 | |
154 | if (strncmp(buf, temp, sizeof(temp) - 1) == 0) { |
155 | buf += sizeof(temp) - 1; |
156 | sdkp->cache_override = 1; |
157 | } else { |
158 | sdkp->cache_override = 0; |
159 | } |
160 | |
161 | ct = sysfs_match_string(sd_cache_types, buf); |
162 | if (ct < 0) |
163 | return -EINVAL; |
164 | |
165 | rcd = ct & 0x01 ? 1 : 0; |
166 | wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0; |
167 | |
168 | if (sdkp->cache_override) { |
169 | sdkp->WCE = wce; |
170 | sdkp->RCD = rcd; |
171 | sd_set_flush_flag(sdkp); |
172 | return count; |
173 | } |
174 | |
175 | if (scsi_mode_sense(sdev: sdp, dbd: 0x08, modepage: 8, subpage: 0, buffer, len: sizeof(buffer), SD_TIMEOUT, |
176 | retries: sdkp->max_retries, data: &data, NULL)) |
177 | return -EINVAL; |
178 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
179 | data.block_descriptor_length); |
180 | buffer_data = buffer + data.header_length + |
181 | data.block_descriptor_length; |
182 | buffer_data[2] &= ~0x05; |
183 | buffer_data[2] |= wce << 2 | rcd; |
184 | sp = buffer_data[0] & 0x80 ? 1 : 0; |
185 | buffer_data[0] &= ~0x80; |
186 | |
187 | /* |
188 | * Ensure WP, DPOFUA, and RESERVED fields are cleared in |
189 | * received mode parameter buffer before doing MODE SELECT. |
190 | */ |
191 | data.device_specific = 0; |
192 | |
193 | ret = scsi_mode_select(sdev: sdp, pf: 1, sp, buffer: buffer_data, len, SD_TIMEOUT, |
194 | retries: sdkp->max_retries, data: &data, &sshdr); |
195 | if (ret) { |
196 | if (ret > 0 && scsi_sense_valid(sshdr: &sshdr)) |
197 | sd_print_sense_hdr(sdkp, sshdr: &sshdr); |
198 | return -EINVAL; |
199 | } |
200 | sd_revalidate_disk(sdkp->disk); |
201 | return count; |
202 | } |
203 | |
204 | static ssize_t |
205 | manage_start_stop_show(struct device *dev, |
206 | struct device_attribute *attr, char *buf) |
207 | { |
208 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
209 | struct scsi_device *sdp = sdkp->device; |
210 | |
211 | return sysfs_emit(buf, fmt: "%u\n" , |
212 | sdp->manage_system_start_stop && |
213 | sdp->manage_runtime_start_stop && |
214 | sdp->manage_shutdown); |
215 | } |
216 | static DEVICE_ATTR_RO(manage_start_stop); |
217 | |
218 | static ssize_t |
219 | manage_system_start_stop_show(struct device *dev, |
220 | struct device_attribute *attr, char *buf) |
221 | { |
222 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
223 | struct scsi_device *sdp = sdkp->device; |
224 | |
225 | return sysfs_emit(buf, fmt: "%u\n" , sdp->manage_system_start_stop); |
226 | } |
227 | |
228 | static ssize_t |
229 | manage_system_start_stop_store(struct device *dev, |
230 | struct device_attribute *attr, |
231 | const char *buf, size_t count) |
232 | { |
233 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
234 | struct scsi_device *sdp = sdkp->device; |
235 | bool v; |
236 | |
237 | if (!capable(CAP_SYS_ADMIN)) |
238 | return -EACCES; |
239 | |
240 | if (kstrtobool(s: buf, res: &v)) |
241 | return -EINVAL; |
242 | |
243 | sdp->manage_system_start_stop = v; |
244 | |
245 | return count; |
246 | } |
247 | static DEVICE_ATTR_RW(manage_system_start_stop); |
248 | |
249 | static ssize_t |
250 | manage_runtime_start_stop_show(struct device *dev, |
251 | struct device_attribute *attr, char *buf) |
252 | { |
253 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
254 | struct scsi_device *sdp = sdkp->device; |
255 | |
256 | return sysfs_emit(buf, fmt: "%u\n" , sdp->manage_runtime_start_stop); |
257 | } |
258 | |
259 | static ssize_t |
260 | manage_runtime_start_stop_store(struct device *dev, |
261 | struct device_attribute *attr, |
262 | const char *buf, size_t count) |
263 | { |
264 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
265 | struct scsi_device *sdp = sdkp->device; |
266 | bool v; |
267 | |
268 | if (!capable(CAP_SYS_ADMIN)) |
269 | return -EACCES; |
270 | |
271 | if (kstrtobool(s: buf, res: &v)) |
272 | return -EINVAL; |
273 | |
274 | sdp->manage_runtime_start_stop = v; |
275 | |
276 | return count; |
277 | } |
278 | static DEVICE_ATTR_RW(manage_runtime_start_stop); |
279 | |
280 | static ssize_t manage_shutdown_show(struct device *dev, |
281 | struct device_attribute *attr, char *buf) |
282 | { |
283 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
284 | struct scsi_device *sdp = sdkp->device; |
285 | |
286 | return sysfs_emit(buf, fmt: "%u\n" , sdp->manage_shutdown); |
287 | } |
288 | |
289 | static ssize_t manage_shutdown_store(struct device *dev, |
290 | struct device_attribute *attr, |
291 | const char *buf, size_t count) |
292 | { |
293 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
294 | struct scsi_device *sdp = sdkp->device; |
295 | bool v; |
296 | |
297 | if (!capable(CAP_SYS_ADMIN)) |
298 | return -EACCES; |
299 | |
300 | if (kstrtobool(s: buf, res: &v)) |
301 | return -EINVAL; |
302 | |
303 | sdp->manage_shutdown = v; |
304 | |
305 | return count; |
306 | } |
307 | static DEVICE_ATTR_RW(manage_shutdown); |
308 | |
309 | static ssize_t |
310 | allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf) |
311 | { |
312 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
313 | |
314 | return sprintf(buf, fmt: "%u\n" , sdkp->device->allow_restart); |
315 | } |
316 | |
317 | static ssize_t |
318 | allow_restart_store(struct device *dev, struct device_attribute *attr, |
319 | const char *buf, size_t count) |
320 | { |
321 | bool v; |
322 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
323 | struct scsi_device *sdp = sdkp->device; |
324 | |
325 | if (!capable(CAP_SYS_ADMIN)) |
326 | return -EACCES; |
327 | |
328 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
329 | return -EINVAL; |
330 | |
331 | if (kstrtobool(s: buf, res: &v)) |
332 | return -EINVAL; |
333 | |
334 | sdp->allow_restart = v; |
335 | |
336 | return count; |
337 | } |
338 | static DEVICE_ATTR_RW(allow_restart); |
339 | |
340 | static ssize_t |
341 | cache_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
342 | { |
343 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
344 | int ct = sdkp->RCD + 2*sdkp->WCE; |
345 | |
346 | return sprintf(buf, fmt: "%s\n" , sd_cache_types[ct]); |
347 | } |
348 | static DEVICE_ATTR_RW(cache_type); |
349 | |
350 | static ssize_t |
351 | FUA_show(struct device *dev, struct device_attribute *attr, char *buf) |
352 | { |
353 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
354 | |
355 | return sprintf(buf, fmt: "%u\n" , sdkp->DPOFUA); |
356 | } |
357 | static DEVICE_ATTR_RO(FUA); |
358 | |
359 | static ssize_t |
360 | protection_type_show(struct device *dev, struct device_attribute *attr, |
361 | char *buf) |
362 | { |
363 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
364 | |
365 | return sprintf(buf, fmt: "%u\n" , sdkp->protection_type); |
366 | } |
367 | |
368 | static ssize_t |
369 | protection_type_store(struct device *dev, struct device_attribute *attr, |
370 | const char *buf, size_t count) |
371 | { |
372 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
373 | unsigned int val; |
374 | int err; |
375 | |
376 | if (!capable(CAP_SYS_ADMIN)) |
377 | return -EACCES; |
378 | |
379 | err = kstrtouint(s: buf, base: 10, res: &val); |
380 | |
381 | if (err) |
382 | return err; |
383 | |
384 | if (val <= T10_PI_TYPE3_PROTECTION) |
385 | sdkp->protection_type = val; |
386 | |
387 | return count; |
388 | } |
389 | static DEVICE_ATTR_RW(protection_type); |
390 | |
391 | static ssize_t |
392 | protection_mode_show(struct device *dev, struct device_attribute *attr, |
393 | char *buf) |
394 | { |
395 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
396 | struct scsi_device *sdp = sdkp->device; |
397 | unsigned int dif, dix; |
398 | |
399 | dif = scsi_host_dif_capable(shost: sdp->host, target_type: sdkp->protection_type); |
400 | dix = scsi_host_dix_capable(shost: sdp->host, target_type: sdkp->protection_type); |
401 | |
402 | if (!dix && scsi_host_dix_capable(shost: sdp->host, target_type: T10_PI_TYPE0_PROTECTION)) { |
403 | dif = 0; |
404 | dix = 1; |
405 | } |
406 | |
407 | if (!dif && !dix) |
408 | return sprintf(buf, fmt: "none\n" ); |
409 | |
410 | return sprintf(buf, fmt: "%s%u\n" , dix ? "dix" : "dif" , dif); |
411 | } |
412 | static DEVICE_ATTR_RO(protection_mode); |
413 | |
414 | static ssize_t |
415 | app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf) |
416 | { |
417 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
418 | |
419 | return sprintf(buf, fmt: "%u\n" , sdkp->ATO); |
420 | } |
421 | static DEVICE_ATTR_RO(app_tag_own); |
422 | |
423 | static ssize_t |
424 | thin_provisioning_show(struct device *dev, struct device_attribute *attr, |
425 | char *buf) |
426 | { |
427 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
428 | |
429 | return sprintf(buf, fmt: "%u\n" , sdkp->lbpme); |
430 | } |
431 | static DEVICE_ATTR_RO(thin_provisioning); |
432 | |
433 | /* sysfs_match_string() requires dense arrays */ |
434 | static const char *lbp_mode[] = { |
435 | [SD_LBP_FULL] = "full" , |
436 | [SD_LBP_UNMAP] = "unmap" , |
437 | [SD_LBP_WS16] = "writesame_16" , |
438 | [SD_LBP_WS10] = "writesame_10" , |
439 | [SD_LBP_ZERO] = "writesame_zero" , |
440 | [SD_LBP_DISABLE] = "disabled" , |
441 | }; |
442 | |
443 | static ssize_t |
444 | provisioning_mode_show(struct device *dev, struct device_attribute *attr, |
445 | char *buf) |
446 | { |
447 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
448 | |
449 | return sprintf(buf, fmt: "%s\n" , lbp_mode[sdkp->provisioning_mode]); |
450 | } |
451 | |
452 | static ssize_t |
453 | provisioning_mode_store(struct device *dev, struct device_attribute *attr, |
454 | const char *buf, size_t count) |
455 | { |
456 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
457 | struct scsi_device *sdp = sdkp->device; |
458 | int mode; |
459 | |
460 | if (!capable(CAP_SYS_ADMIN)) |
461 | return -EACCES; |
462 | |
463 | if (sd_is_zoned(sdkp)) { |
464 | sd_config_discard(sdkp, SD_LBP_DISABLE); |
465 | return count; |
466 | } |
467 | |
468 | if (sdp->type != TYPE_DISK) |
469 | return -EINVAL; |
470 | |
471 | mode = sysfs_match_string(lbp_mode, buf); |
472 | if (mode < 0) |
473 | return -EINVAL; |
474 | |
475 | sd_config_discard(sdkp, mode); |
476 | |
477 | return count; |
478 | } |
479 | static DEVICE_ATTR_RW(provisioning_mode); |
480 | |
481 | /* sysfs_match_string() requires dense arrays */ |
482 | static const char *zeroing_mode[] = { |
483 | [SD_ZERO_WRITE] = "write" , |
484 | [SD_ZERO_WS] = "writesame" , |
485 | [SD_ZERO_WS16_UNMAP] = "writesame_16_unmap" , |
486 | [SD_ZERO_WS10_UNMAP] = "writesame_10_unmap" , |
487 | }; |
488 | |
489 | static ssize_t |
490 | zeroing_mode_show(struct device *dev, struct device_attribute *attr, |
491 | char *buf) |
492 | { |
493 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
494 | |
495 | return sprintf(buf, fmt: "%s\n" , zeroing_mode[sdkp->zeroing_mode]); |
496 | } |
497 | |
498 | static ssize_t |
499 | zeroing_mode_store(struct device *dev, struct device_attribute *attr, |
500 | const char *buf, size_t count) |
501 | { |
502 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
503 | int mode; |
504 | |
505 | if (!capable(CAP_SYS_ADMIN)) |
506 | return -EACCES; |
507 | |
508 | mode = sysfs_match_string(zeroing_mode, buf); |
509 | if (mode < 0) |
510 | return -EINVAL; |
511 | |
512 | sdkp->zeroing_mode = mode; |
513 | |
514 | return count; |
515 | } |
516 | static DEVICE_ATTR_RW(zeroing_mode); |
517 | |
518 | static ssize_t |
519 | max_medium_access_timeouts_show(struct device *dev, |
520 | struct device_attribute *attr, char *buf) |
521 | { |
522 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
523 | |
524 | return sprintf(buf, fmt: "%u\n" , sdkp->max_medium_access_timeouts); |
525 | } |
526 | |
527 | static ssize_t |
528 | max_medium_access_timeouts_store(struct device *dev, |
529 | struct device_attribute *attr, const char *buf, |
530 | size_t count) |
531 | { |
532 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
533 | int err; |
534 | |
535 | if (!capable(CAP_SYS_ADMIN)) |
536 | return -EACCES; |
537 | |
538 | err = kstrtouint(s: buf, base: 10, res: &sdkp->max_medium_access_timeouts); |
539 | |
540 | return err ? err : count; |
541 | } |
542 | static DEVICE_ATTR_RW(max_medium_access_timeouts); |
543 | |
544 | static ssize_t |
545 | max_write_same_blocks_show(struct device *dev, struct device_attribute *attr, |
546 | char *buf) |
547 | { |
548 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
549 | |
550 | return sprintf(buf, fmt: "%u\n" , sdkp->max_ws_blocks); |
551 | } |
552 | |
553 | static ssize_t |
554 | max_write_same_blocks_store(struct device *dev, struct device_attribute *attr, |
555 | const char *buf, size_t count) |
556 | { |
557 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
558 | struct scsi_device *sdp = sdkp->device; |
559 | unsigned long max; |
560 | int err; |
561 | |
562 | if (!capable(CAP_SYS_ADMIN)) |
563 | return -EACCES; |
564 | |
565 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
566 | return -EINVAL; |
567 | |
568 | err = kstrtoul(s: buf, base: 10, res: &max); |
569 | |
570 | if (err) |
571 | return err; |
572 | |
573 | if (max == 0) |
574 | sdp->no_write_same = 1; |
575 | else if (max <= SD_MAX_WS16_BLOCKS) { |
576 | sdp->no_write_same = 0; |
577 | sdkp->max_ws_blocks = max; |
578 | } |
579 | |
580 | sd_config_write_same(sdkp); |
581 | |
582 | return count; |
583 | } |
584 | static DEVICE_ATTR_RW(max_write_same_blocks); |
585 | |
586 | static ssize_t |
587 | zoned_cap_show(struct device *dev, struct device_attribute *attr, char *buf) |
588 | { |
589 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
590 | |
591 | if (sdkp->device->type == TYPE_ZBC) |
592 | return sprintf(buf, fmt: "host-managed\n" ); |
593 | if (sdkp->zoned == 1) |
594 | return sprintf(buf, fmt: "host-aware\n" ); |
595 | if (sdkp->zoned == 2) |
596 | return sprintf(buf, fmt: "drive-managed\n" ); |
597 | return sprintf(buf, fmt: "none\n" ); |
598 | } |
599 | static DEVICE_ATTR_RO(zoned_cap); |
600 | |
601 | static ssize_t |
602 | max_retries_store(struct device *dev, struct device_attribute *attr, |
603 | const char *buf, size_t count) |
604 | { |
605 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
606 | struct scsi_device *sdev = sdkp->device; |
607 | int retries, err; |
608 | |
609 | err = kstrtoint(s: buf, base: 10, res: &retries); |
610 | if (err) |
611 | return err; |
612 | |
613 | if (retries == SCSI_CMD_RETRIES_NO_LIMIT || retries <= SD_MAX_RETRIES) { |
614 | sdkp->max_retries = retries; |
615 | return count; |
616 | } |
617 | |
618 | sdev_printk(KERN_ERR, sdev, "max_retries must be between -1 and %d\n" , |
619 | SD_MAX_RETRIES); |
620 | return -EINVAL; |
621 | } |
622 | |
623 | static ssize_t |
624 | max_retries_show(struct device *dev, struct device_attribute *attr, |
625 | char *buf) |
626 | { |
627 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
628 | |
629 | return sprintf(buf, fmt: "%d\n" , sdkp->max_retries); |
630 | } |
631 | |
632 | static DEVICE_ATTR_RW(max_retries); |
633 | |
634 | static struct attribute *sd_disk_attrs[] = { |
635 | &dev_attr_cache_type.attr, |
636 | &dev_attr_FUA.attr, |
637 | &dev_attr_allow_restart.attr, |
638 | &dev_attr_manage_start_stop.attr, |
639 | &dev_attr_manage_system_start_stop.attr, |
640 | &dev_attr_manage_runtime_start_stop.attr, |
641 | &dev_attr_manage_shutdown.attr, |
642 | &dev_attr_protection_type.attr, |
643 | &dev_attr_protection_mode.attr, |
644 | &dev_attr_app_tag_own.attr, |
645 | &dev_attr_thin_provisioning.attr, |
646 | &dev_attr_provisioning_mode.attr, |
647 | &dev_attr_zeroing_mode.attr, |
648 | &dev_attr_max_write_same_blocks.attr, |
649 | &dev_attr_max_medium_access_timeouts.attr, |
650 | &dev_attr_zoned_cap.attr, |
651 | &dev_attr_max_retries.attr, |
652 | NULL, |
653 | }; |
654 | ATTRIBUTE_GROUPS(sd_disk); |
655 | |
656 | static struct class sd_disk_class = { |
657 | .name = "scsi_disk" , |
658 | .dev_release = scsi_disk_release, |
659 | .dev_groups = sd_disk_groups, |
660 | }; |
661 | |
662 | /* |
663 | * Don't request a new module, as that could deadlock in multipath |
664 | * environment. |
665 | */ |
666 | static void sd_default_probe(dev_t devt) |
667 | { |
668 | } |
669 | |
670 | /* |
671 | * Device no to disk mapping: |
672 | * |
673 | * major disc2 disc p1 |
674 | * |............|.............|....|....| <- dev_t |
675 | * 31 20 19 8 7 4 3 0 |
676 | * |
677 | * Inside a major, we have 16k disks, however mapped non- |
678 | * contiguously. The first 16 disks are for major0, the next |
679 | * ones with major1, ... Disk 256 is for major0 again, disk 272 |
680 | * for major1, ... |
681 | * As we stay compatible with our numbering scheme, we can reuse |
682 | * the well-know SCSI majors 8, 65--71, 136--143. |
683 | */ |
684 | static int sd_major(int major_idx) |
685 | { |
686 | switch (major_idx) { |
687 | case 0: |
688 | return SCSI_DISK0_MAJOR; |
689 | case 1 ... 7: |
690 | return SCSI_DISK1_MAJOR + major_idx - 1; |
691 | case 8 ... 15: |
692 | return SCSI_DISK8_MAJOR + major_idx - 8; |
693 | default: |
694 | BUG(); |
695 | return 0; /* shut up gcc */ |
696 | } |
697 | } |
698 | |
699 | #ifdef CONFIG_BLK_SED_OPAL |
700 | static int sd_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, |
701 | size_t len, bool send) |
702 | { |
703 | struct scsi_disk *sdkp = data; |
704 | struct scsi_device *sdev = sdkp->device; |
705 | u8 cdb[12] = { 0, }; |
706 | const struct scsi_exec_args exec_args = { |
707 | .req_flags = BLK_MQ_REQ_PM, |
708 | }; |
709 | int ret; |
710 | |
711 | cdb[0] = send ? SECURITY_PROTOCOL_OUT : SECURITY_PROTOCOL_IN; |
712 | cdb[1] = secp; |
713 | put_unaligned_be16(val: spsp, p: &cdb[2]); |
714 | put_unaligned_be32(val: len, p: &cdb[6]); |
715 | |
716 | ret = scsi_execute_cmd(sdev, cmd: cdb, opf: send ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, |
717 | buffer, bufflen: len, SD_TIMEOUT, retries: sdkp->max_retries, |
718 | args: &exec_args); |
719 | return ret <= 0 ? ret : -EIO; |
720 | } |
721 | #endif /* CONFIG_BLK_SED_OPAL */ |
722 | |
723 | /* |
724 | * Look up the DIX operation based on whether the command is read or |
725 | * write and whether dix and dif are enabled. |
726 | */ |
727 | static unsigned int sd_prot_op(bool write, bool dix, bool dif) |
728 | { |
729 | /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */ |
730 | static const unsigned int ops[] = { /* wrt dix dif */ |
731 | SCSI_PROT_NORMAL, /* 0 0 0 */ |
732 | SCSI_PROT_READ_STRIP, /* 0 0 1 */ |
733 | SCSI_PROT_READ_INSERT, /* 0 1 0 */ |
734 | SCSI_PROT_READ_PASS, /* 0 1 1 */ |
735 | SCSI_PROT_NORMAL, /* 1 0 0 */ |
736 | SCSI_PROT_WRITE_INSERT, /* 1 0 1 */ |
737 | SCSI_PROT_WRITE_STRIP, /* 1 1 0 */ |
738 | SCSI_PROT_WRITE_PASS, /* 1 1 1 */ |
739 | }; |
740 | |
741 | return ops[write << 2 | dix << 1 | dif]; |
742 | } |
743 | |
744 | /* |
745 | * Returns a mask of the protection flags that are valid for a given DIX |
746 | * operation. |
747 | */ |
748 | static unsigned int sd_prot_flag_mask(unsigned int prot_op) |
749 | { |
750 | static const unsigned int flag_mask[] = { |
751 | [SCSI_PROT_NORMAL] = 0, |
752 | |
753 | [SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI | |
754 | SCSI_PROT_GUARD_CHECK | |
755 | SCSI_PROT_REF_CHECK | |
756 | SCSI_PROT_REF_INCREMENT, |
757 | |
758 | [SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT | |
759 | SCSI_PROT_IP_CHECKSUM, |
760 | |
761 | [SCSI_PROT_READ_PASS] = SCSI_PROT_TRANSFER_PI | |
762 | SCSI_PROT_GUARD_CHECK | |
763 | SCSI_PROT_REF_CHECK | |
764 | SCSI_PROT_REF_INCREMENT | |
765 | SCSI_PROT_IP_CHECKSUM, |
766 | |
767 | [SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI | |
768 | SCSI_PROT_REF_INCREMENT, |
769 | |
770 | [SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK | |
771 | SCSI_PROT_REF_CHECK | |
772 | SCSI_PROT_REF_INCREMENT | |
773 | SCSI_PROT_IP_CHECKSUM, |
774 | |
775 | [SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI | |
776 | SCSI_PROT_GUARD_CHECK | |
777 | SCSI_PROT_REF_CHECK | |
778 | SCSI_PROT_REF_INCREMENT | |
779 | SCSI_PROT_IP_CHECKSUM, |
780 | }; |
781 | |
782 | return flag_mask[prot_op]; |
783 | } |
784 | |
785 | static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd, |
786 | unsigned int dix, unsigned int dif) |
787 | { |
788 | struct request *rq = scsi_cmd_to_rq(scmd); |
789 | struct bio *bio = rq->bio; |
790 | unsigned int prot_op = sd_prot_op(rq_data_dir(rq), dix, dif); |
791 | unsigned int protect = 0; |
792 | |
793 | if (dix) { /* DIX Type 0, 1, 2, 3 */ |
794 | if (bio_integrity_flagged(bio, flag: BIP_IP_CHECKSUM)) |
795 | scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM; |
796 | |
797 | if (bio_integrity_flagged(bio, flag: BIP_CTRL_NOCHECK) == false) |
798 | scmd->prot_flags |= SCSI_PROT_GUARD_CHECK; |
799 | } |
800 | |
801 | if (dif != T10_PI_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */ |
802 | scmd->prot_flags |= SCSI_PROT_REF_INCREMENT; |
803 | |
804 | if (bio_integrity_flagged(bio, flag: BIP_CTRL_NOCHECK) == false) |
805 | scmd->prot_flags |= SCSI_PROT_REF_CHECK; |
806 | } |
807 | |
808 | if (dif) { /* DIX/DIF Type 1, 2, 3 */ |
809 | scmd->prot_flags |= SCSI_PROT_TRANSFER_PI; |
810 | |
811 | if (bio_integrity_flagged(bio, flag: BIP_DISK_NOCHECK)) |
812 | protect = 3 << 5; /* Disable target PI checking */ |
813 | else |
814 | protect = 1 << 5; /* Enable target PI checking */ |
815 | } |
816 | |
817 | scsi_set_prot_op(scmd, op: prot_op); |
818 | scsi_set_prot_type(scmd, type: dif); |
819 | scmd->prot_flags &= sd_prot_flag_mask(prot_op); |
820 | |
821 | return protect; |
822 | } |
823 | |
824 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) |
825 | { |
826 | struct request_queue *q = sdkp->disk->queue; |
827 | unsigned int logical_block_size = sdkp->device->sector_size; |
828 | unsigned int max_blocks = 0; |
829 | |
830 | q->limits.discard_alignment = |
831 | sdkp->unmap_alignment * logical_block_size; |
832 | q->limits.discard_granularity = |
833 | max(sdkp->physical_block_size, |
834 | sdkp->unmap_granularity * logical_block_size); |
835 | sdkp->provisioning_mode = mode; |
836 | |
837 | switch (mode) { |
838 | |
839 | case SD_LBP_FULL: |
840 | case SD_LBP_DISABLE: |
841 | blk_queue_max_discard_sectors(q, max_discard_sectors: 0); |
842 | return; |
843 | |
844 | case SD_LBP_UNMAP: |
845 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, |
846 | (u32)SD_MAX_WS16_BLOCKS); |
847 | break; |
848 | |
849 | case SD_LBP_WS16: |
850 | if (sdkp->device->unmap_limit_for_ws) |
851 | max_blocks = sdkp->max_unmap_blocks; |
852 | else |
853 | max_blocks = sdkp->max_ws_blocks; |
854 | |
855 | max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS16_BLOCKS); |
856 | break; |
857 | |
858 | case SD_LBP_WS10: |
859 | if (sdkp->device->unmap_limit_for_ws) |
860 | max_blocks = sdkp->max_unmap_blocks; |
861 | else |
862 | max_blocks = sdkp->max_ws_blocks; |
863 | |
864 | max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS10_BLOCKS); |
865 | break; |
866 | |
867 | case SD_LBP_ZERO: |
868 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
869 | (u32)SD_MAX_WS10_BLOCKS); |
870 | break; |
871 | } |
872 | |
873 | blk_queue_max_discard_sectors(q, max_discard_sectors: max_blocks * (logical_block_size >> 9)); |
874 | } |
875 | |
876 | static void *sd_set_special_bvec(struct request *rq, unsigned int data_len) |
877 | { |
878 | struct page *page; |
879 | |
880 | page = mempool_alloc(pool: sd_page_pool, GFP_ATOMIC); |
881 | if (!page) |
882 | return NULL; |
883 | clear_highpage(page); |
884 | bvec_set_page(bv: &rq->special_vec, page, len: data_len, offset: 0); |
885 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; |
886 | return bvec_virt(bvec: &rq->special_vec); |
887 | } |
888 | |
889 | static blk_status_t sd_setup_unmap_cmnd(struct scsi_cmnd *cmd) |
890 | { |
891 | struct scsi_device *sdp = cmd->device; |
892 | struct request *rq = scsi_cmd_to_rq(scmd: cmd); |
893 | struct scsi_disk *sdkp = scsi_disk(disk: rq->q->disk); |
894 | u64 lba = sectors_to_logical(sdev: sdp, sector: blk_rq_pos(rq)); |
895 | u32 nr_blocks = sectors_to_logical(sdev: sdp, sector: blk_rq_sectors(rq)); |
896 | unsigned int data_len = 24; |
897 | char *buf; |
898 | |
899 | buf = sd_set_special_bvec(rq, data_len); |
900 | if (!buf) |
901 | return BLK_STS_RESOURCE; |
902 | |
903 | cmd->cmd_len = 10; |
904 | cmd->cmnd[0] = UNMAP; |
905 | cmd->cmnd[8] = 24; |
906 | |
907 | put_unaligned_be16(val: 6 + 16, p: &buf[0]); |
908 | put_unaligned_be16(val: 16, p: &buf[2]); |
909 | put_unaligned_be64(val: lba, p: &buf[8]); |
910 | put_unaligned_be32(val: nr_blocks, p: &buf[16]); |
911 | |
912 | cmd->allowed = sdkp->max_retries; |
913 | cmd->transfersize = data_len; |
914 | rq->timeout = SD_TIMEOUT; |
915 | |
916 | return scsi_alloc_sgtables(cmd); |
917 | } |
918 | |
919 | static blk_status_t sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd, |
920 | bool unmap) |
921 | { |
922 | struct scsi_device *sdp = cmd->device; |
923 | struct request *rq = scsi_cmd_to_rq(scmd: cmd); |
924 | struct scsi_disk *sdkp = scsi_disk(disk: rq->q->disk); |
925 | u64 lba = sectors_to_logical(sdev: sdp, sector: blk_rq_pos(rq)); |
926 | u32 nr_blocks = sectors_to_logical(sdev: sdp, sector: blk_rq_sectors(rq)); |
927 | u32 data_len = sdp->sector_size; |
928 | |
929 | if (!sd_set_special_bvec(rq, data_len)) |
930 | return BLK_STS_RESOURCE; |
931 | |
932 | cmd->cmd_len = 16; |
933 | cmd->cmnd[0] = WRITE_SAME_16; |
934 | if (unmap) |
935 | cmd->cmnd[1] = 0x8; /* UNMAP */ |
936 | put_unaligned_be64(val: lba, p: &cmd->cmnd[2]); |
937 | put_unaligned_be32(val: nr_blocks, p: &cmd->cmnd[10]); |
938 | |
939 | cmd->allowed = sdkp->max_retries; |
940 | cmd->transfersize = data_len; |
941 | rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT; |
942 | |
943 | return scsi_alloc_sgtables(cmd); |
944 | } |
945 | |
946 | static blk_status_t sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd, |
947 | bool unmap) |
948 | { |
949 | struct scsi_device *sdp = cmd->device; |
950 | struct request *rq = scsi_cmd_to_rq(scmd: cmd); |
951 | struct scsi_disk *sdkp = scsi_disk(disk: rq->q->disk); |
952 | u64 lba = sectors_to_logical(sdev: sdp, sector: blk_rq_pos(rq)); |
953 | u32 nr_blocks = sectors_to_logical(sdev: sdp, sector: blk_rq_sectors(rq)); |
954 | u32 data_len = sdp->sector_size; |
955 | |
956 | if (!sd_set_special_bvec(rq, data_len)) |
957 | return BLK_STS_RESOURCE; |
958 | |
959 | cmd->cmd_len = 10; |
960 | cmd->cmnd[0] = WRITE_SAME; |
961 | if (unmap) |
962 | cmd->cmnd[1] = 0x8; /* UNMAP */ |
963 | put_unaligned_be32(val: lba, p: &cmd->cmnd[2]); |
964 | put_unaligned_be16(val: nr_blocks, p: &cmd->cmnd[7]); |
965 | |
966 | cmd->allowed = sdkp->max_retries; |
967 | cmd->transfersize = data_len; |
968 | rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT; |
969 | |
970 | return scsi_alloc_sgtables(cmd); |
971 | } |
972 | |
973 | static blk_status_t sd_setup_write_zeroes_cmnd(struct scsi_cmnd *cmd) |
974 | { |
975 | struct request *rq = scsi_cmd_to_rq(scmd: cmd); |
976 | struct scsi_device *sdp = cmd->device; |
977 | struct scsi_disk *sdkp = scsi_disk(disk: rq->q->disk); |
978 | u64 lba = sectors_to_logical(sdev: sdp, sector: blk_rq_pos(rq)); |
979 | u32 nr_blocks = sectors_to_logical(sdev: sdp, sector: blk_rq_sectors(rq)); |
980 | |
981 | if (!(rq->cmd_flags & REQ_NOUNMAP)) { |
982 | switch (sdkp->zeroing_mode) { |
983 | case SD_ZERO_WS16_UNMAP: |
984 | return sd_setup_write_same16_cmnd(cmd, unmap: true); |
985 | case SD_ZERO_WS10_UNMAP: |
986 | return sd_setup_write_same10_cmnd(cmd, unmap: true); |
987 | } |
988 | } |
989 | |
990 | if (sdp->no_write_same) { |
991 | rq->rq_flags |= RQF_QUIET; |
992 | return BLK_STS_TARGET; |
993 | } |
994 | |
995 | if (sdkp->ws16 || lba > 0xffffffff || nr_blocks > 0xffff) |
996 | return sd_setup_write_same16_cmnd(cmd, unmap: false); |
997 | |
998 | return sd_setup_write_same10_cmnd(cmd, unmap: false); |
999 | } |
1000 | |
1001 | static void sd_config_write_same(struct scsi_disk *sdkp) |
1002 | { |
1003 | struct request_queue *q = sdkp->disk->queue; |
1004 | unsigned int logical_block_size = sdkp->device->sector_size; |
1005 | |
1006 | if (sdkp->device->no_write_same) { |
1007 | sdkp->max_ws_blocks = 0; |
1008 | goto out; |
1009 | } |
1010 | |
1011 | /* Some devices can not handle block counts above 0xffff despite |
1012 | * supporting WRITE SAME(16). Consequently we default to 64k |
1013 | * blocks per I/O unless the device explicitly advertises a |
1014 | * bigger limit. |
1015 | */ |
1016 | if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS) |
1017 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, |
1018 | (u32)SD_MAX_WS16_BLOCKS); |
1019 | else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes) |
1020 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, |
1021 | (u32)SD_MAX_WS10_BLOCKS); |
1022 | else { |
1023 | sdkp->device->no_write_same = 1; |
1024 | sdkp->max_ws_blocks = 0; |
1025 | } |
1026 | |
1027 | if (sdkp->lbprz && sdkp->lbpws) |
1028 | sdkp->zeroing_mode = SD_ZERO_WS16_UNMAP; |
1029 | else if (sdkp->lbprz && sdkp->lbpws10) |
1030 | sdkp->zeroing_mode = SD_ZERO_WS10_UNMAP; |
1031 | else if (sdkp->max_ws_blocks) |
1032 | sdkp->zeroing_mode = SD_ZERO_WS; |
1033 | else |
1034 | sdkp->zeroing_mode = SD_ZERO_WRITE; |
1035 | |
1036 | if (sdkp->max_ws_blocks && |
1037 | sdkp->physical_block_size > logical_block_size) { |
1038 | /* |
1039 | * Reporting a maximum number of blocks that is not aligned |
1040 | * on the device physical size would cause a large write same |
1041 | * request to be split into physically unaligned chunks by |
1042 | * __blkdev_issue_write_zeroes() even if the caller of this |
1043 | * functions took care to align the large request. So make sure |
1044 | * the maximum reported is aligned to the device physical block |
1045 | * size. This is only an optional optimization for regular |
1046 | * disks, but this is mandatory to avoid failure of large write |
1047 | * same requests directed at sequential write required zones of |
1048 | * host-managed ZBC disks. |
1049 | */ |
1050 | sdkp->max_ws_blocks = |
1051 | round_down(sdkp->max_ws_blocks, |
1052 | bytes_to_logical(sdkp->device, |
1053 | sdkp->physical_block_size)); |
1054 | } |
1055 | |
1056 | out: |
1057 | blk_queue_max_write_zeroes_sectors(q, max_write_same_sectors: sdkp->max_ws_blocks * |
1058 | (logical_block_size >> 9)); |
1059 | } |
1060 | |
1061 | static blk_status_t sd_setup_flush_cmnd(struct scsi_cmnd *cmd) |
1062 | { |
1063 | struct request *rq = scsi_cmd_to_rq(scmd: cmd); |
1064 | struct scsi_disk *sdkp = scsi_disk(disk: rq->q->disk); |
1065 | |
1066 | /* flush requests don't perform I/O, zero the S/G table */ |
1067 | memset(&cmd->sdb, 0, sizeof(cmd->sdb)); |
1068 | |
1069 | if (cmd->device->use_16_for_sync) { |
1070 | cmd->cmnd[0] = SYNCHRONIZE_CACHE_16; |
1071 | cmd->cmd_len = 16; |
1072 | } else { |
1073 | cmd->cmnd[0] = SYNCHRONIZE_CACHE; |
1074 | cmd->cmd_len = 10; |
1075 | } |
1076 | cmd->transfersize = 0; |
1077 | cmd->allowed = sdkp->max_retries; |
1078 | |
1079 | rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER; |
1080 | return BLK_STS_OK; |
1081 | } |
1082 | |
1083 | static blk_status_t sd_setup_rw32_cmnd(struct scsi_cmnd *cmd, bool write, |
1084 | sector_t lba, unsigned int nr_blocks, |
1085 | unsigned char flags, unsigned int dld) |
1086 | { |
1087 | cmd->cmd_len = SD_EXT_CDB_SIZE; |
1088 | cmd->cmnd[0] = VARIABLE_LENGTH_CMD; |
1089 | cmd->cmnd[7] = 0x18; /* Additional CDB len */ |
1090 | cmd->cmnd[9] = write ? WRITE_32 : READ_32; |
1091 | cmd->cmnd[10] = flags; |
1092 | cmd->cmnd[11] = dld & 0x07; |
1093 | put_unaligned_be64(val: lba, p: &cmd->cmnd[12]); |
1094 | put_unaligned_be32(val: lba, p: &cmd->cmnd[20]); /* Expected Indirect LBA */ |
1095 | put_unaligned_be32(val: nr_blocks, p: &cmd->cmnd[28]); |
1096 | |
1097 | return BLK_STS_OK; |
1098 | } |
1099 | |
1100 | static blk_status_t sd_setup_rw16_cmnd(struct scsi_cmnd *cmd, bool write, |
1101 | sector_t lba, unsigned int nr_blocks, |
1102 | unsigned char flags, unsigned int dld) |
1103 | { |
1104 | cmd->cmd_len = 16; |
1105 | cmd->cmnd[0] = write ? WRITE_16 : READ_16; |
1106 | cmd->cmnd[1] = flags | ((dld >> 2) & 0x01); |
1107 | cmd->cmnd[14] = (dld & 0x03) << 6; |
1108 | cmd->cmnd[15] = 0; |
1109 | put_unaligned_be64(val: lba, p: &cmd->cmnd[2]); |
1110 | put_unaligned_be32(val: nr_blocks, p: &cmd->cmnd[10]); |
1111 | |
1112 | return BLK_STS_OK; |
1113 | } |
1114 | |
1115 | static blk_status_t sd_setup_rw10_cmnd(struct scsi_cmnd *cmd, bool write, |
1116 | sector_t lba, unsigned int nr_blocks, |
1117 | unsigned char flags) |
1118 | { |
1119 | cmd->cmd_len = 10; |
1120 | cmd->cmnd[0] = write ? WRITE_10 : READ_10; |
1121 | cmd->cmnd[1] = flags; |
1122 | cmd->cmnd[6] = 0; |
1123 | cmd->cmnd[9] = 0; |
1124 | put_unaligned_be32(val: lba, p: &cmd->cmnd[2]); |
1125 | put_unaligned_be16(val: nr_blocks, p: &cmd->cmnd[7]); |
1126 | |
1127 | return BLK_STS_OK; |
1128 | } |
1129 | |
1130 | static blk_status_t sd_setup_rw6_cmnd(struct scsi_cmnd *cmd, bool write, |
1131 | sector_t lba, unsigned int nr_blocks, |
1132 | unsigned char flags) |
1133 | { |
1134 | /* Avoid that 0 blocks gets translated into 256 blocks. */ |
1135 | if (WARN_ON_ONCE(nr_blocks == 0)) |
1136 | return BLK_STS_IOERR; |
1137 | |
1138 | if (unlikely(flags & 0x8)) { |
1139 | /* |
1140 | * This happens only if this drive failed 10byte rw |
1141 | * command with ILLEGAL_REQUEST during operation and |
1142 | * thus turned off use_10_for_rw. |
1143 | */ |
1144 | scmd_printk(KERN_ERR, cmd, "FUA write on READ/WRITE(6) drive\n" ); |
1145 | return BLK_STS_IOERR; |
1146 | } |
1147 | |
1148 | cmd->cmd_len = 6; |
1149 | cmd->cmnd[0] = write ? WRITE_6 : READ_6; |
1150 | cmd->cmnd[1] = (lba >> 16) & 0x1f; |
1151 | cmd->cmnd[2] = (lba >> 8) & 0xff; |
1152 | cmd->cmnd[3] = lba & 0xff; |
1153 | cmd->cmnd[4] = nr_blocks; |
1154 | cmd->cmnd[5] = 0; |
1155 | |
1156 | return BLK_STS_OK; |
1157 | } |
1158 | |
1159 | /* |
1160 | * Check if a command has a duration limit set. If it does, and the target |
1161 | * device supports CDL and the feature is enabled, return the limit |
1162 | * descriptor index to use. Return 0 (no limit) otherwise. |
1163 | */ |
1164 | static int sd_cdl_dld(struct scsi_disk *sdkp, struct scsi_cmnd *scmd) |
1165 | { |
1166 | struct scsi_device *sdp = sdkp->device; |
1167 | int hint; |
1168 | |
1169 | if (!sdp->cdl_supported || !sdp->cdl_enable) |
1170 | return 0; |
1171 | |
1172 | /* |
1173 | * Use "no limit" if the request ioprio does not specify a duration |
1174 | * limit hint. |
1175 | */ |
1176 | hint = IOPRIO_PRIO_HINT(req_get_ioprio(scsi_cmd_to_rq(scmd))); |
1177 | if (hint < IOPRIO_HINT_DEV_DURATION_LIMIT_1 || |
1178 | hint > IOPRIO_HINT_DEV_DURATION_LIMIT_7) |
1179 | return 0; |
1180 | |
1181 | return (hint - IOPRIO_HINT_DEV_DURATION_LIMIT_1) + 1; |
1182 | } |
1183 | |
1184 | static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd) |
1185 | { |
1186 | struct request *rq = scsi_cmd_to_rq(scmd: cmd); |
1187 | struct scsi_device *sdp = cmd->device; |
1188 | struct scsi_disk *sdkp = scsi_disk(disk: rq->q->disk); |
1189 | sector_t lba = sectors_to_logical(sdev: sdp, sector: blk_rq_pos(rq)); |
1190 | sector_t threshold; |
1191 | unsigned int nr_blocks = sectors_to_logical(sdev: sdp, sector: blk_rq_sectors(rq)); |
1192 | unsigned int mask = logical_to_sectors(sdev: sdp, blocks: 1) - 1; |
1193 | bool write = rq_data_dir(rq) == WRITE; |
1194 | unsigned char protect, fua; |
1195 | unsigned int dld; |
1196 | blk_status_t ret; |
1197 | unsigned int dif; |
1198 | bool dix; |
1199 | |
1200 | ret = scsi_alloc_sgtables(cmd); |
1201 | if (ret != BLK_STS_OK) |
1202 | return ret; |
1203 | |
1204 | ret = BLK_STS_IOERR; |
1205 | if (!scsi_device_online(sdev: sdp) || sdp->changed) { |
1206 | scmd_printk(KERN_ERR, cmd, "device offline or changed\n" ); |
1207 | goto fail; |
1208 | } |
1209 | |
1210 | if (blk_rq_pos(rq) + blk_rq_sectors(rq) > get_capacity(disk: rq->q->disk)) { |
1211 | scmd_printk(KERN_ERR, cmd, "access beyond end of device\n" ); |
1212 | goto fail; |
1213 | } |
1214 | |
1215 | if ((blk_rq_pos(rq) & mask) || (blk_rq_sectors(rq) & mask)) { |
1216 | scmd_printk(KERN_ERR, cmd, "request not aligned to the logical block size\n" ); |
1217 | goto fail; |
1218 | } |
1219 | |
1220 | /* |
1221 | * Some SD card readers can't handle accesses which touch the |
1222 | * last one or two logical blocks. Split accesses as needed. |
1223 | */ |
1224 | threshold = sdkp->capacity - SD_LAST_BUGGY_SECTORS; |
1225 | |
1226 | if (unlikely(sdp->last_sector_bug && lba + nr_blocks > threshold)) { |
1227 | if (lba < threshold) { |
1228 | /* Access up to the threshold but not beyond */ |
1229 | nr_blocks = threshold - lba; |
1230 | } else { |
1231 | /* Access only a single logical block */ |
1232 | nr_blocks = 1; |
1233 | } |
1234 | } |
1235 | |
1236 | if (req_op(req: rq) == REQ_OP_ZONE_APPEND) { |
1237 | ret = sd_zbc_prepare_zone_append(cmd, lba: &lba, nr_blocks); |
1238 | if (ret) |
1239 | goto fail; |
1240 | } |
1241 | |
1242 | fua = rq->cmd_flags & REQ_FUA ? 0x8 : 0; |
1243 | dix = scsi_prot_sg_count(cmd); |
1244 | dif = scsi_host_dif_capable(shost: cmd->device->host, target_type: sdkp->protection_type); |
1245 | dld = sd_cdl_dld(sdkp, scmd: cmd); |
1246 | |
1247 | if (dif || dix) |
1248 | protect = sd_setup_protect_cmnd(scmd: cmd, dix, dif); |
1249 | else |
1250 | protect = 0; |
1251 | |
1252 | if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) { |
1253 | ret = sd_setup_rw32_cmnd(cmd, write, lba, nr_blocks, |
1254 | flags: protect | fua, dld); |
1255 | } else if (sdp->use_16_for_rw || (nr_blocks > 0xffff)) { |
1256 | ret = sd_setup_rw16_cmnd(cmd, write, lba, nr_blocks, |
1257 | flags: protect | fua, dld); |
1258 | } else if ((nr_blocks > 0xff) || (lba > 0x1fffff) || |
1259 | sdp->use_10_for_rw || protect) { |
1260 | ret = sd_setup_rw10_cmnd(cmd, write, lba, nr_blocks, |
1261 | flags: protect | fua); |
1262 | } else { |
1263 | ret = sd_setup_rw6_cmnd(cmd, write, lba, nr_blocks, |
1264 | flags: protect | fua); |
1265 | } |
1266 | |
1267 | if (unlikely(ret != BLK_STS_OK)) |
1268 | goto fail; |
1269 | |
1270 | /* |
1271 | * We shouldn't disconnect in the middle of a sector, so with a dumb |
1272 | * host adapter, it's safe to assume that we can at least transfer |
1273 | * this many bytes between each connect / disconnect. |
1274 | */ |
1275 | cmd->transfersize = sdp->sector_size; |
1276 | cmd->underflow = nr_blocks << 9; |
1277 | cmd->allowed = sdkp->max_retries; |
1278 | cmd->sdb.length = nr_blocks * sdp->sector_size; |
1279 | |
1280 | SCSI_LOG_HLQUEUE(1, |
1281 | scmd_printk(KERN_INFO, cmd, |
1282 | "%s: block=%llu, count=%d\n" , __func__, |
1283 | (unsigned long long)blk_rq_pos(rq), |
1284 | blk_rq_sectors(rq))); |
1285 | SCSI_LOG_HLQUEUE(2, |
1286 | scmd_printk(KERN_INFO, cmd, |
1287 | "%s %d/%u 512 byte blocks.\n" , |
1288 | write ? "writing" : "reading" , nr_blocks, |
1289 | blk_rq_sectors(rq))); |
1290 | |
1291 | /* |
1292 | * This indicates that the command is ready from our end to be queued. |
1293 | */ |
1294 | return BLK_STS_OK; |
1295 | fail: |
1296 | scsi_free_sgtables(cmd); |
1297 | return ret; |
1298 | } |
1299 | |
1300 | static blk_status_t sd_init_command(struct scsi_cmnd *cmd) |
1301 | { |
1302 | struct request *rq = scsi_cmd_to_rq(scmd: cmd); |
1303 | |
1304 | switch (req_op(req: rq)) { |
1305 | case REQ_OP_DISCARD: |
1306 | switch (scsi_disk(disk: rq->q->disk)->provisioning_mode) { |
1307 | case SD_LBP_UNMAP: |
1308 | return sd_setup_unmap_cmnd(cmd); |
1309 | case SD_LBP_WS16: |
1310 | return sd_setup_write_same16_cmnd(cmd, unmap: true); |
1311 | case SD_LBP_WS10: |
1312 | return sd_setup_write_same10_cmnd(cmd, unmap: true); |
1313 | case SD_LBP_ZERO: |
1314 | return sd_setup_write_same10_cmnd(cmd, unmap: false); |
1315 | default: |
1316 | return BLK_STS_TARGET; |
1317 | } |
1318 | case REQ_OP_WRITE_ZEROES: |
1319 | return sd_setup_write_zeroes_cmnd(cmd); |
1320 | case REQ_OP_FLUSH: |
1321 | return sd_setup_flush_cmnd(cmd); |
1322 | case REQ_OP_READ: |
1323 | case REQ_OP_WRITE: |
1324 | case REQ_OP_ZONE_APPEND: |
1325 | return sd_setup_read_write_cmnd(cmd); |
1326 | case REQ_OP_ZONE_RESET: |
1327 | return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_RESET_WRITE_POINTER, |
1328 | all: false); |
1329 | case REQ_OP_ZONE_RESET_ALL: |
1330 | return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_RESET_WRITE_POINTER, |
1331 | all: true); |
1332 | case REQ_OP_ZONE_OPEN: |
1333 | return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_OPEN_ZONE, all: false); |
1334 | case REQ_OP_ZONE_CLOSE: |
1335 | return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_CLOSE_ZONE, all: false); |
1336 | case REQ_OP_ZONE_FINISH: |
1337 | return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_FINISH_ZONE, all: false); |
1338 | default: |
1339 | WARN_ON_ONCE(1); |
1340 | return BLK_STS_NOTSUPP; |
1341 | } |
1342 | } |
1343 | |
1344 | static void sd_uninit_command(struct scsi_cmnd *SCpnt) |
1345 | { |
1346 | struct request *rq = scsi_cmd_to_rq(scmd: SCpnt); |
1347 | |
1348 | if (rq->rq_flags & RQF_SPECIAL_PAYLOAD) |
1349 | mempool_free(element: rq->special_vec.bv_page, pool: sd_page_pool); |
1350 | } |
1351 | |
1352 | static bool sd_need_revalidate(struct gendisk *disk, struct scsi_disk *sdkp) |
1353 | { |
1354 | if (sdkp->device->removable || sdkp->write_prot) { |
1355 | if (disk_check_media_change(disk)) |
1356 | return true; |
1357 | } |
1358 | |
1359 | /* |
1360 | * Force a full rescan after ioctl(BLKRRPART). While the disk state has |
1361 | * nothing to do with partitions, BLKRRPART is used to force a full |
1362 | * revalidate after things like a format for historical reasons. |
1363 | */ |
1364 | return test_bit(GD_NEED_PART_SCAN, &disk->state); |
1365 | } |
1366 | |
1367 | /** |
1368 | * sd_open - open a scsi disk device |
1369 | * @disk: disk to open |
1370 | * @mode: open mode |
1371 | * |
1372 | * Returns 0 if successful. Returns a negated errno value in case |
1373 | * of error. |
1374 | * |
1375 | * Note: This can be called from a user context (e.g. fsck(1) ) |
1376 | * or from within the kernel (e.g. as a result of a mount(1) ). |
1377 | * In the latter case @inode and @filp carry an abridged amount |
1378 | * of information as noted above. |
1379 | * |
1380 | * Locking: called with disk->open_mutex held. |
1381 | **/ |
1382 | static int sd_open(struct gendisk *disk, blk_mode_t mode) |
1383 | { |
1384 | struct scsi_disk *sdkp = scsi_disk(disk); |
1385 | struct scsi_device *sdev = sdkp->device; |
1386 | int retval; |
1387 | |
1388 | if (scsi_device_get(sdev)) |
1389 | return -ENXIO; |
1390 | |
1391 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n" )); |
1392 | |
1393 | /* |
1394 | * If the device is in error recovery, wait until it is done. |
1395 | * If the device is offline, then disallow any access to it. |
1396 | */ |
1397 | retval = -ENXIO; |
1398 | if (!scsi_block_when_processing_errors(sdev)) |
1399 | goto error_out; |
1400 | |
1401 | if (sd_need_revalidate(disk, sdkp)) |
1402 | sd_revalidate_disk(disk); |
1403 | |
1404 | /* |
1405 | * If the drive is empty, just let the open fail. |
1406 | */ |
1407 | retval = -ENOMEDIUM; |
1408 | if (sdev->removable && !sdkp->media_present && |
1409 | !(mode & BLK_OPEN_NDELAY)) |
1410 | goto error_out; |
1411 | |
1412 | /* |
1413 | * If the device has the write protect tab set, have the open fail |
1414 | * if the user expects to be able to write to the thing. |
1415 | */ |
1416 | retval = -EROFS; |
1417 | if (sdkp->write_prot && (mode & BLK_OPEN_WRITE)) |
1418 | goto error_out; |
1419 | |
1420 | /* |
1421 | * It is possible that the disk changing stuff resulted in |
1422 | * the device being taken offline. If this is the case, |
1423 | * report this to the user, and don't pretend that the |
1424 | * open actually succeeded. |
1425 | */ |
1426 | retval = -ENXIO; |
1427 | if (!scsi_device_online(sdev)) |
1428 | goto error_out; |
1429 | |
1430 | if ((atomic_inc_return(v: &sdkp->openers) == 1) && sdev->removable) { |
1431 | if (scsi_block_when_processing_errors(sdev)) |
1432 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); |
1433 | } |
1434 | |
1435 | return 0; |
1436 | |
1437 | error_out: |
1438 | scsi_device_put(sdev); |
1439 | return retval; |
1440 | } |
1441 | |
1442 | /** |
1443 | * sd_release - invoked when the (last) close(2) is called on this |
1444 | * scsi disk. |
1445 | * @disk: disk to release |
1446 | * |
1447 | * Returns 0. |
1448 | * |
1449 | * Note: may block (uninterruptible) if error recovery is underway |
1450 | * on this disk. |
1451 | * |
1452 | * Locking: called with disk->open_mutex held. |
1453 | **/ |
1454 | static void sd_release(struct gendisk *disk) |
1455 | { |
1456 | struct scsi_disk *sdkp = scsi_disk(disk); |
1457 | struct scsi_device *sdev = sdkp->device; |
1458 | |
1459 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n" )); |
1460 | |
1461 | if (atomic_dec_return(v: &sdkp->openers) == 0 && sdev->removable) { |
1462 | if (scsi_block_when_processing_errors(sdev)) |
1463 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); |
1464 | } |
1465 | |
1466 | scsi_device_put(sdev); |
1467 | } |
1468 | |
1469 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1470 | { |
1471 | struct scsi_disk *sdkp = scsi_disk(disk: bdev->bd_disk); |
1472 | struct scsi_device *sdp = sdkp->device; |
1473 | struct Scsi_Host *host = sdp->host; |
1474 | sector_t capacity = logical_to_sectors(sdev: sdp, blocks: sdkp->capacity); |
1475 | int diskinfo[4]; |
1476 | |
1477 | /* default to most commonly used values */ |
1478 | diskinfo[0] = 0x40; /* 1 << 6 */ |
1479 | diskinfo[1] = 0x20; /* 1 << 5 */ |
1480 | diskinfo[2] = capacity >> 11; |
1481 | |
1482 | /* override with calculated, extended default, or driver values */ |
1483 | if (host->hostt->bios_param) |
1484 | host->hostt->bios_param(sdp, bdev, capacity, diskinfo); |
1485 | else |
1486 | scsicam_bios_param(bdev, capacity, ip: diskinfo); |
1487 | |
1488 | geo->heads = diskinfo[0]; |
1489 | geo->sectors = diskinfo[1]; |
1490 | geo->cylinders = diskinfo[2]; |
1491 | return 0; |
1492 | } |
1493 | |
1494 | /** |
1495 | * sd_ioctl - process an ioctl |
1496 | * @bdev: target block device |
1497 | * @mode: open mode |
1498 | * @cmd: ioctl command number |
1499 | * @arg: this is third argument given to ioctl(2) system call. |
1500 | * Often contains a pointer. |
1501 | * |
1502 | * Returns 0 if successful (some ioctls return positive numbers on |
1503 | * success as well). Returns a negated errno value in case of error. |
1504 | * |
1505 | * Note: most ioctls are forward onto the block subsystem or further |
1506 | * down in the scsi subsystem. |
1507 | **/ |
1508 | static int sd_ioctl(struct block_device *bdev, blk_mode_t mode, |
1509 | unsigned int cmd, unsigned long arg) |
1510 | { |
1511 | struct gendisk *disk = bdev->bd_disk; |
1512 | struct scsi_disk *sdkp = scsi_disk(disk); |
1513 | struct scsi_device *sdp = sdkp->device; |
1514 | void __user *p = (void __user *)arg; |
1515 | int error; |
1516 | |
1517 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
1518 | "cmd=0x%x\n" , disk->disk_name, cmd)); |
1519 | |
1520 | if (bdev_is_partition(bdev) && !capable(CAP_SYS_RAWIO)) |
1521 | return -ENOIOCTLCMD; |
1522 | |
1523 | /* |
1524 | * If we are in the middle of error recovery, don't let anyone |
1525 | * else try and use this device. Also, if error recovery fails, it |
1526 | * may try and take the device offline, in which case all further |
1527 | * access to the device is prohibited. |
1528 | */ |
1529 | error = scsi_ioctl_block_when_processing_errors(sdev: sdp, cmd, |
1530 | ndelay: (mode & BLK_OPEN_NDELAY)); |
1531 | if (error) |
1532 | return error; |
1533 | |
1534 | if (is_sed_ioctl(cmd)) |
1535 | return sed_ioctl(dev: sdkp->opal_dev, cmd, ioctl_ptr: p); |
1536 | return scsi_ioctl(sdev: sdp, open_for_write: mode & BLK_OPEN_WRITE, cmd, arg: p); |
1537 | } |
1538 | |
1539 | static void set_media_not_present(struct scsi_disk *sdkp) |
1540 | { |
1541 | if (sdkp->media_present) |
1542 | sdkp->device->changed = 1; |
1543 | |
1544 | if (sdkp->device->removable) { |
1545 | sdkp->media_present = 0; |
1546 | sdkp->capacity = 0; |
1547 | } |
1548 | } |
1549 | |
1550 | static int media_not_present(struct scsi_disk *sdkp, |
1551 | struct scsi_sense_hdr *sshdr) |
1552 | { |
1553 | if (!scsi_sense_valid(sshdr)) |
1554 | return 0; |
1555 | |
1556 | /* not invoked for commands that could return deferred errors */ |
1557 | switch (sshdr->sense_key) { |
1558 | case UNIT_ATTENTION: |
1559 | case NOT_READY: |
1560 | /* medium not present */ |
1561 | if (sshdr->asc == 0x3A) { |
1562 | set_media_not_present(sdkp); |
1563 | return 1; |
1564 | } |
1565 | } |
1566 | return 0; |
1567 | } |
1568 | |
1569 | /** |
1570 | * sd_check_events - check media events |
1571 | * @disk: kernel device descriptor |
1572 | * @clearing: disk events currently being cleared |
1573 | * |
1574 | * Returns mask of DISK_EVENT_*. |
1575 | * |
1576 | * Note: this function is invoked from the block subsystem. |
1577 | **/ |
1578 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
1579 | { |
1580 | struct scsi_disk *sdkp = disk->private_data; |
1581 | struct scsi_device *sdp; |
1582 | int retval; |
1583 | bool disk_changed; |
1584 | |
1585 | if (!sdkp) |
1586 | return 0; |
1587 | |
1588 | sdp = sdkp->device; |
1589 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n" )); |
1590 | |
1591 | /* |
1592 | * If the device is offline, don't send any commands - just pretend as |
1593 | * if the command failed. If the device ever comes back online, we |
1594 | * can deal with it then. It is only because of unrecoverable errors |
1595 | * that we would ever take a device offline in the first place. |
1596 | */ |
1597 | if (!scsi_device_online(sdev: sdp)) { |
1598 | set_media_not_present(sdkp); |
1599 | goto out; |
1600 | } |
1601 | |
1602 | /* |
1603 | * Using TEST_UNIT_READY enables differentiation between drive with |
1604 | * no cartridge loaded - NOT READY, drive with changed cartridge - |
1605 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. |
1606 | * |
1607 | * Drives that auto spin down. eg iomega jaz 1G, will be started |
1608 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever |
1609 | * sd_revalidate() is called. |
1610 | */ |
1611 | if (scsi_block_when_processing_errors(sdp)) { |
1612 | struct scsi_sense_hdr sshdr = { 0, }; |
1613 | |
1614 | retval = scsi_test_unit_ready(sdev: sdp, SD_TIMEOUT, retries: sdkp->max_retries, |
1615 | sshdr: &sshdr); |
1616 | |
1617 | /* failed to execute TUR, assume media not present */ |
1618 | if (retval < 0 || host_byte(retval)) { |
1619 | set_media_not_present(sdkp); |
1620 | goto out; |
1621 | } |
1622 | |
1623 | if (media_not_present(sdkp, sshdr: &sshdr)) |
1624 | goto out; |
1625 | } |
1626 | |
1627 | /* |
1628 | * For removable scsi disk we have to recognise the presence |
1629 | * of a disk in the drive. |
1630 | */ |
1631 | if (!sdkp->media_present) |
1632 | sdp->changed = 1; |
1633 | sdkp->media_present = 1; |
1634 | out: |
1635 | /* |
1636 | * sdp->changed is set under the following conditions: |
1637 | * |
1638 | * Medium present state has changed in either direction. |
1639 | * Device has indicated UNIT_ATTENTION. |
1640 | */ |
1641 | disk_changed = sdp->changed; |
1642 | sdp->changed = 0; |
1643 | return disk_changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
1644 | } |
1645 | |
1646 | static int sd_sync_cache(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr) |
1647 | { |
1648 | int retries, res; |
1649 | struct scsi_device *sdp = sdkp->device; |
1650 | const int timeout = sdp->request_queue->rq_timeout |
1651 | * SD_FLUSH_TIMEOUT_MULTIPLIER; |
1652 | struct scsi_sense_hdr my_sshdr; |
1653 | const struct scsi_exec_args exec_args = { |
1654 | .req_flags = BLK_MQ_REQ_PM, |
1655 | /* caller might not be interested in sense, but we need it */ |
1656 | .sshdr = sshdr ? : &my_sshdr, |
1657 | }; |
1658 | |
1659 | if (!scsi_device_online(sdev: sdp)) |
1660 | return -ENODEV; |
1661 | |
1662 | sshdr = exec_args.sshdr; |
1663 | |
1664 | for (retries = 3; retries > 0; --retries) { |
1665 | unsigned char cmd[16] = { 0 }; |
1666 | |
1667 | if (sdp->use_16_for_sync) |
1668 | cmd[0] = SYNCHRONIZE_CACHE_16; |
1669 | else |
1670 | cmd[0] = SYNCHRONIZE_CACHE; |
1671 | /* |
1672 | * Leave the rest of the command zero to indicate |
1673 | * flush everything. |
1674 | */ |
1675 | res = scsi_execute_cmd(sdev: sdp, cmd, opf: REQ_OP_DRV_IN, NULL, bufflen: 0, |
1676 | timeout, retries: sdkp->max_retries, args: &exec_args); |
1677 | if (res == 0) |
1678 | break; |
1679 | } |
1680 | |
1681 | if (res) { |
1682 | sd_print_result(sdkp, msg: "Synchronize Cache(10) failed" , result: res); |
1683 | |
1684 | if (res < 0) |
1685 | return res; |
1686 | |
1687 | if (scsi_status_is_check_condition(status: res) && |
1688 | scsi_sense_valid(sshdr)) { |
1689 | sd_print_sense_hdr(sdkp, sshdr); |
1690 | |
1691 | /* we need to evaluate the error return */ |
1692 | if (sshdr->asc == 0x3a || /* medium not present */ |
1693 | sshdr->asc == 0x20 || /* invalid command */ |
1694 | (sshdr->asc == 0x74 && sshdr->ascq == 0x71)) /* drive is password locked */ |
1695 | /* this is no error here */ |
1696 | return 0; |
1697 | } |
1698 | |
1699 | switch (host_byte(res)) { |
1700 | /* ignore errors due to racing a disconnection */ |
1701 | case DID_BAD_TARGET: |
1702 | case DID_NO_CONNECT: |
1703 | return 0; |
1704 | /* signal the upper layer it might try again */ |
1705 | case DID_BUS_BUSY: |
1706 | case DID_IMM_RETRY: |
1707 | case DID_REQUEUE: |
1708 | case DID_SOFT_ERROR: |
1709 | return -EBUSY; |
1710 | default: |
1711 | return -EIO; |
1712 | } |
1713 | } |
1714 | return 0; |
1715 | } |
1716 | |
1717 | static void sd_rescan(struct device *dev) |
1718 | { |
1719 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
1720 | |
1721 | sd_revalidate_disk(sdkp->disk); |
1722 | } |
1723 | |
1724 | static int sd_get_unique_id(struct gendisk *disk, u8 id[16], |
1725 | enum blk_unique_id type) |
1726 | { |
1727 | struct scsi_device *sdev = scsi_disk(disk)->device; |
1728 | const struct scsi_vpd *vpd; |
1729 | const unsigned char *d; |
1730 | int ret = -ENXIO, len; |
1731 | |
1732 | rcu_read_lock(); |
1733 | vpd = rcu_dereference(sdev->vpd_pg83); |
1734 | if (!vpd) |
1735 | goto out_unlock; |
1736 | |
1737 | ret = -EINVAL; |
1738 | for (d = vpd->data + 4; d < vpd->data + vpd->len; d += d[3] + 4) { |
1739 | /* we only care about designators with LU association */ |
1740 | if (((d[1] >> 4) & 0x3) != 0x00) |
1741 | continue; |
1742 | if ((d[1] & 0xf) != type) |
1743 | continue; |
1744 | |
1745 | /* |
1746 | * Only exit early if a 16-byte descriptor was found. Otherwise |
1747 | * keep looking as one with more entropy might still show up. |
1748 | */ |
1749 | len = d[3]; |
1750 | if (len != 8 && len != 12 && len != 16) |
1751 | continue; |
1752 | ret = len; |
1753 | memcpy(id, d + 4, len); |
1754 | if (len == 16) |
1755 | break; |
1756 | } |
1757 | out_unlock: |
1758 | rcu_read_unlock(); |
1759 | return ret; |
1760 | } |
1761 | |
1762 | static int sd_scsi_to_pr_err(struct scsi_sense_hdr *sshdr, int result) |
1763 | { |
1764 | switch (host_byte(result)) { |
1765 | case DID_TRANSPORT_MARGINAL: |
1766 | case DID_TRANSPORT_DISRUPTED: |
1767 | case DID_BUS_BUSY: |
1768 | return PR_STS_RETRY_PATH_FAILURE; |
1769 | case DID_NO_CONNECT: |
1770 | return PR_STS_PATH_FAILED; |
1771 | case DID_TRANSPORT_FAILFAST: |
1772 | return PR_STS_PATH_FAST_FAILED; |
1773 | } |
1774 | |
1775 | switch (status_byte(result)) { |
1776 | case SAM_STAT_RESERVATION_CONFLICT: |
1777 | return PR_STS_RESERVATION_CONFLICT; |
1778 | case SAM_STAT_CHECK_CONDITION: |
1779 | if (!scsi_sense_valid(sshdr)) |
1780 | return PR_STS_IOERR; |
1781 | |
1782 | if (sshdr->sense_key == ILLEGAL_REQUEST && |
1783 | (sshdr->asc == 0x26 || sshdr->asc == 0x24)) |
1784 | return -EINVAL; |
1785 | |
1786 | fallthrough; |
1787 | default: |
1788 | return PR_STS_IOERR; |
1789 | } |
1790 | } |
1791 | |
1792 | static int sd_pr_in_command(struct block_device *bdev, u8 sa, |
1793 | unsigned char *data, int data_len) |
1794 | { |
1795 | struct scsi_disk *sdkp = scsi_disk(disk: bdev->bd_disk); |
1796 | struct scsi_device *sdev = sdkp->device; |
1797 | struct scsi_sense_hdr sshdr; |
1798 | u8 cmd[10] = { PERSISTENT_RESERVE_IN, sa }; |
1799 | const struct scsi_exec_args exec_args = { |
1800 | .sshdr = &sshdr, |
1801 | }; |
1802 | int result; |
1803 | |
1804 | put_unaligned_be16(val: data_len, p: &cmd[7]); |
1805 | |
1806 | result = scsi_execute_cmd(sdev, cmd, opf: REQ_OP_DRV_IN, buffer: data, bufflen: data_len, |
1807 | SD_TIMEOUT, retries: sdkp->max_retries, args: &exec_args); |
1808 | if (scsi_status_is_check_condition(status: result) && |
1809 | scsi_sense_valid(sshdr: &sshdr)) { |
1810 | sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n" , result); |
1811 | scsi_print_sense_hdr(sdev, NULL, &sshdr); |
1812 | } |
1813 | |
1814 | if (result <= 0) |
1815 | return result; |
1816 | |
1817 | return sd_scsi_to_pr_err(sshdr: &sshdr, result); |
1818 | } |
1819 | |
1820 | static int sd_pr_read_keys(struct block_device *bdev, struct pr_keys *keys_info) |
1821 | { |
1822 | int result, i, data_offset, num_copy_keys; |
1823 | u32 num_keys = keys_info->num_keys; |
1824 | int data_len = num_keys * 8 + 8; |
1825 | u8 *data; |
1826 | |
1827 | data = kzalloc(size: data_len, GFP_KERNEL); |
1828 | if (!data) |
1829 | return -ENOMEM; |
1830 | |
1831 | result = sd_pr_in_command(bdev, READ_KEYS, data, data_len); |
1832 | if (result) |
1833 | goto free_data; |
1834 | |
1835 | keys_info->generation = get_unaligned_be32(p: &data[0]); |
1836 | keys_info->num_keys = get_unaligned_be32(p: &data[4]) / 8; |
1837 | |
1838 | data_offset = 8; |
1839 | num_copy_keys = min(num_keys, keys_info->num_keys); |
1840 | |
1841 | for (i = 0; i < num_copy_keys; i++) { |
1842 | keys_info->keys[i] = get_unaligned_be64(p: &data[data_offset]); |
1843 | data_offset += 8; |
1844 | } |
1845 | |
1846 | free_data: |
1847 | kfree(objp: data); |
1848 | return result; |
1849 | } |
1850 | |
1851 | static int sd_pr_read_reservation(struct block_device *bdev, |
1852 | struct pr_held_reservation *rsv) |
1853 | { |
1854 | struct scsi_disk *sdkp = scsi_disk(disk: bdev->bd_disk); |
1855 | struct scsi_device *sdev = sdkp->device; |
1856 | u8 data[24] = { }; |
1857 | int result, len; |
1858 | |
1859 | result = sd_pr_in_command(bdev, READ_RESERVATION, data, data_len: sizeof(data)); |
1860 | if (result) |
1861 | return result; |
1862 | |
1863 | len = get_unaligned_be32(p: &data[4]); |
1864 | if (!len) |
1865 | return 0; |
1866 | |
1867 | /* Make sure we have at least the key and type */ |
1868 | if (len < 14) { |
1869 | sdev_printk(KERN_INFO, sdev, |
1870 | "READ RESERVATION failed due to short return buffer of %d bytes\n" , |
1871 | len); |
1872 | return -EINVAL; |
1873 | } |
1874 | |
1875 | rsv->generation = get_unaligned_be32(p: &data[0]); |
1876 | rsv->key = get_unaligned_be64(p: &data[8]); |
1877 | rsv->type = scsi_pr_type_to_block(type: data[21] & 0x0f); |
1878 | return 0; |
1879 | } |
1880 | |
1881 | static int sd_pr_out_command(struct block_device *bdev, u8 sa, u64 key, |
1882 | u64 sa_key, enum scsi_pr_type type, u8 flags) |
1883 | { |
1884 | struct scsi_disk *sdkp = scsi_disk(disk: bdev->bd_disk); |
1885 | struct scsi_device *sdev = sdkp->device; |
1886 | struct scsi_sense_hdr sshdr; |
1887 | const struct scsi_exec_args exec_args = { |
1888 | .sshdr = &sshdr, |
1889 | }; |
1890 | int result; |
1891 | u8 cmd[16] = { 0, }; |
1892 | u8 data[24] = { 0, }; |
1893 | |
1894 | cmd[0] = PERSISTENT_RESERVE_OUT; |
1895 | cmd[1] = sa; |
1896 | cmd[2] = type; |
1897 | put_unaligned_be32(val: sizeof(data), p: &cmd[5]); |
1898 | |
1899 | put_unaligned_be64(val: key, p: &data[0]); |
1900 | put_unaligned_be64(val: sa_key, p: &data[8]); |
1901 | data[20] = flags; |
1902 | |
1903 | result = scsi_execute_cmd(sdev, cmd, opf: REQ_OP_DRV_OUT, buffer: &data, |
1904 | bufflen: sizeof(data), SD_TIMEOUT, retries: sdkp->max_retries, |
1905 | args: &exec_args); |
1906 | |
1907 | if (scsi_status_is_check_condition(status: result) && |
1908 | scsi_sense_valid(sshdr: &sshdr)) { |
1909 | sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n" , result); |
1910 | scsi_print_sense_hdr(sdev, NULL, &sshdr); |
1911 | } |
1912 | |
1913 | if (result <= 0) |
1914 | return result; |
1915 | |
1916 | return sd_scsi_to_pr_err(sshdr: &sshdr, result); |
1917 | } |
1918 | |
1919 | static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, |
1920 | u32 flags) |
1921 | { |
1922 | if (flags & ~PR_FL_IGNORE_KEY) |
1923 | return -EOPNOTSUPP; |
1924 | return sd_pr_out_command(bdev, sa: (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00, |
1925 | key: old_key, sa_key: new_key, type: 0, |
1926 | flags: (1 << 0) /* APTPL */); |
1927 | } |
1928 | |
1929 | static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, |
1930 | u32 flags) |
1931 | { |
1932 | if (flags) |
1933 | return -EOPNOTSUPP; |
1934 | return sd_pr_out_command(bdev, sa: 0x01, key, sa_key: 0, |
1935 | type: block_pr_type_to_scsi(type), flags: 0); |
1936 | } |
1937 | |
1938 | static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type) |
1939 | { |
1940 | return sd_pr_out_command(bdev, sa: 0x02, key, sa_key: 0, |
1941 | type: block_pr_type_to_scsi(type), flags: 0); |
1942 | } |
1943 | |
1944 | static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key, |
1945 | enum pr_type type, bool abort) |
1946 | { |
1947 | return sd_pr_out_command(bdev, sa: abort ? 0x05 : 0x04, key: old_key, sa_key: new_key, |
1948 | type: block_pr_type_to_scsi(type), flags: 0); |
1949 | } |
1950 | |
1951 | static int sd_pr_clear(struct block_device *bdev, u64 key) |
1952 | { |
1953 | return sd_pr_out_command(bdev, sa: 0x03, key, sa_key: 0, type: 0, flags: 0); |
1954 | } |
1955 | |
1956 | static const struct pr_ops sd_pr_ops = { |
1957 | .pr_register = sd_pr_register, |
1958 | .pr_reserve = sd_pr_reserve, |
1959 | .pr_release = sd_pr_release, |
1960 | .pr_preempt = sd_pr_preempt, |
1961 | .pr_clear = sd_pr_clear, |
1962 | .pr_read_keys = sd_pr_read_keys, |
1963 | .pr_read_reservation = sd_pr_read_reservation, |
1964 | }; |
1965 | |
1966 | static void scsi_disk_free_disk(struct gendisk *disk) |
1967 | { |
1968 | struct scsi_disk *sdkp = scsi_disk(disk); |
1969 | |
1970 | put_device(dev: &sdkp->disk_dev); |
1971 | } |
1972 | |
1973 | static const struct block_device_operations sd_fops = { |
1974 | .owner = THIS_MODULE, |
1975 | .open = sd_open, |
1976 | .release = sd_release, |
1977 | .ioctl = sd_ioctl, |
1978 | .getgeo = sd_getgeo, |
1979 | .compat_ioctl = blkdev_compat_ptr_ioctl, |
1980 | .check_events = sd_check_events, |
1981 | .unlock_native_capacity = sd_unlock_native_capacity, |
1982 | .report_zones = sd_zbc_report_zones, |
1983 | .get_unique_id = sd_get_unique_id, |
1984 | .free_disk = scsi_disk_free_disk, |
1985 | .pr_ops = &sd_pr_ops, |
1986 | }; |
1987 | |
1988 | /** |
1989 | * sd_eh_reset - reset error handling callback |
1990 | * @scmd: sd-issued command that has failed |
1991 | * |
1992 | * This function is called by the SCSI midlayer before starting |
1993 | * SCSI EH. When counting medium access failures we have to be |
1994 | * careful to register it only only once per device and SCSI EH run; |
1995 | * there might be several timed out commands which will cause the |
1996 | * 'max_medium_access_timeouts' counter to trigger after the first |
1997 | * SCSI EH run already and set the device to offline. |
1998 | * So this function resets the internal counter before starting SCSI EH. |
1999 | **/ |
2000 | static void sd_eh_reset(struct scsi_cmnd *scmd) |
2001 | { |
2002 | struct scsi_disk *sdkp = scsi_disk(disk: scsi_cmd_to_rq(scmd)->q->disk); |
2003 | |
2004 | /* New SCSI EH run, reset gate variable */ |
2005 | sdkp->ignore_medium_access_errors = false; |
2006 | } |
2007 | |
2008 | /** |
2009 | * sd_eh_action - error handling callback |
2010 | * @scmd: sd-issued command that has failed |
2011 | * @eh_disp: The recovery disposition suggested by the midlayer |
2012 | * |
2013 | * This function is called by the SCSI midlayer upon completion of an |
2014 | * error test command (currently TEST UNIT READY). The result of sending |
2015 | * the eh command is passed in eh_disp. We're looking for devices that |
2016 | * fail medium access commands but are OK with non access commands like |
2017 | * test unit ready (so wrongly see the device as having a successful |
2018 | * recovery) |
2019 | **/ |
2020 | static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp) |
2021 | { |
2022 | struct scsi_disk *sdkp = scsi_disk(disk: scsi_cmd_to_rq(scmd)->q->disk); |
2023 | struct scsi_device *sdev = scmd->device; |
2024 | |
2025 | if (!scsi_device_online(sdev) || |
2026 | !scsi_medium_access_command(scmd) || |
2027 | host_byte(scmd->result) != DID_TIME_OUT || |
2028 | eh_disp != SUCCESS) |
2029 | return eh_disp; |
2030 | |
2031 | /* |
2032 | * The device has timed out executing a medium access command. |
2033 | * However, the TEST UNIT READY command sent during error |
2034 | * handling completed successfully. Either the device is in the |
2035 | * process of recovering or has it suffered an internal failure |
2036 | * that prevents access to the storage medium. |
2037 | */ |
2038 | if (!sdkp->ignore_medium_access_errors) { |
2039 | sdkp->medium_access_timed_out++; |
2040 | sdkp->ignore_medium_access_errors = true; |
2041 | } |
2042 | |
2043 | /* |
2044 | * If the device keeps failing read/write commands but TEST UNIT |
2045 | * READY always completes successfully we assume that medium |
2046 | * access is no longer possible and take the device offline. |
2047 | */ |
2048 | if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) { |
2049 | scmd_printk(KERN_ERR, scmd, |
2050 | "Medium access timeout failure. Offlining disk!\n" ); |
2051 | mutex_lock(&sdev->state_mutex); |
2052 | scsi_device_set_state(sdev, state: SDEV_OFFLINE); |
2053 | mutex_unlock(lock: &sdev->state_mutex); |
2054 | |
2055 | return SUCCESS; |
2056 | } |
2057 | |
2058 | return eh_disp; |
2059 | } |
2060 | |
2061 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
2062 | { |
2063 | struct request *req = scsi_cmd_to_rq(scmd); |
2064 | struct scsi_device *sdev = scmd->device; |
2065 | unsigned int transferred, good_bytes; |
2066 | u64 start_lba, end_lba, bad_lba; |
2067 | |
2068 | /* |
2069 | * Some commands have a payload smaller than the device logical |
2070 | * block size (e.g. INQUIRY on a 4K disk). |
2071 | */ |
2072 | if (scsi_bufflen(cmd: scmd) <= sdev->sector_size) |
2073 | return 0; |
2074 | |
2075 | /* Check if we have a 'bad_lba' information */ |
2076 | if (!scsi_get_sense_info_fld(sense_buffer: scmd->sense_buffer, |
2077 | SCSI_SENSE_BUFFERSIZE, |
2078 | info_out: &bad_lba)) |
2079 | return 0; |
2080 | |
2081 | /* |
2082 | * If the bad lba was reported incorrectly, we have no idea where |
2083 | * the error is. |
2084 | */ |
2085 | start_lba = sectors_to_logical(sdev, sector: blk_rq_pos(rq: req)); |
2086 | end_lba = start_lba + bytes_to_logical(sdev, bytes: scsi_bufflen(cmd: scmd)); |
2087 | if (bad_lba < start_lba || bad_lba >= end_lba) |
2088 | return 0; |
2089 | |
2090 | /* |
2091 | * resid is optional but mostly filled in. When it's unused, |
2092 | * its value is zero, so we assume the whole buffer transferred |
2093 | */ |
2094 | transferred = scsi_bufflen(cmd: scmd) - scsi_get_resid(cmd: scmd); |
2095 | |
2096 | /* This computation should always be done in terms of the |
2097 | * resolution of the device's medium. |
2098 | */ |
2099 | good_bytes = logical_to_bytes(sdev, blocks: bad_lba - start_lba); |
2100 | |
2101 | return min(good_bytes, transferred); |
2102 | } |
2103 | |
2104 | /** |
2105 | * sd_done - bottom half handler: called when the lower level |
2106 | * driver has completed (successfully or otherwise) a scsi command. |
2107 | * @SCpnt: mid-level's per command structure. |
2108 | * |
2109 | * Note: potentially run from within an ISR. Must not block. |
2110 | **/ |
2111 | static int sd_done(struct scsi_cmnd *SCpnt) |
2112 | { |
2113 | int result = SCpnt->result; |
2114 | unsigned int good_bytes = result ? 0 : scsi_bufflen(cmd: SCpnt); |
2115 | unsigned int sector_size = SCpnt->device->sector_size; |
2116 | unsigned int resid; |
2117 | struct scsi_sense_hdr sshdr; |
2118 | struct request *req = scsi_cmd_to_rq(scmd: SCpnt); |
2119 | struct scsi_disk *sdkp = scsi_disk(disk: req->q->disk); |
2120 | int sense_valid = 0; |
2121 | int sense_deferred = 0; |
2122 | |
2123 | switch (req_op(req)) { |
2124 | case REQ_OP_DISCARD: |
2125 | case REQ_OP_WRITE_ZEROES: |
2126 | case REQ_OP_ZONE_RESET: |
2127 | case REQ_OP_ZONE_RESET_ALL: |
2128 | case REQ_OP_ZONE_OPEN: |
2129 | case REQ_OP_ZONE_CLOSE: |
2130 | case REQ_OP_ZONE_FINISH: |
2131 | if (!result) { |
2132 | good_bytes = blk_rq_bytes(rq: req); |
2133 | scsi_set_resid(cmd: SCpnt, resid: 0); |
2134 | } else { |
2135 | good_bytes = 0; |
2136 | scsi_set_resid(cmd: SCpnt, resid: blk_rq_bytes(rq: req)); |
2137 | } |
2138 | break; |
2139 | default: |
2140 | /* |
2141 | * In case of bogus fw or device, we could end up having |
2142 | * an unaligned partial completion. Check this here and force |
2143 | * alignment. |
2144 | */ |
2145 | resid = scsi_get_resid(cmd: SCpnt); |
2146 | if (resid & (sector_size - 1)) { |
2147 | sd_printk(KERN_INFO, sdkp, |
2148 | "Unaligned partial completion (resid=%u, sector_sz=%u)\n" , |
2149 | resid, sector_size); |
2150 | scsi_print_command(SCpnt); |
2151 | resid = min(scsi_bufflen(SCpnt), |
2152 | round_up(resid, sector_size)); |
2153 | scsi_set_resid(cmd: SCpnt, resid); |
2154 | } |
2155 | } |
2156 | |
2157 | if (result) { |
2158 | sense_valid = scsi_command_normalize_sense(cmd: SCpnt, sshdr: &sshdr); |
2159 | if (sense_valid) |
2160 | sense_deferred = scsi_sense_is_deferred(sshdr: &sshdr); |
2161 | } |
2162 | sdkp->medium_access_timed_out = 0; |
2163 | |
2164 | if (!scsi_status_is_check_condition(status: result) && |
2165 | (!sense_valid || sense_deferred)) |
2166 | goto out; |
2167 | |
2168 | switch (sshdr.sense_key) { |
2169 | case HARDWARE_ERROR: |
2170 | case MEDIUM_ERROR: |
2171 | good_bytes = sd_completed_bytes(scmd: SCpnt); |
2172 | break; |
2173 | case RECOVERED_ERROR: |
2174 | good_bytes = scsi_bufflen(cmd: SCpnt); |
2175 | break; |
2176 | case NO_SENSE: |
2177 | /* This indicates a false check condition, so ignore it. An |
2178 | * unknown amount of data was transferred so treat it as an |
2179 | * error. |
2180 | */ |
2181 | SCpnt->result = 0; |
2182 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); |
2183 | break; |
2184 | case ABORTED_COMMAND: |
2185 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ |
2186 | good_bytes = sd_completed_bytes(scmd: SCpnt); |
2187 | break; |
2188 | case ILLEGAL_REQUEST: |
2189 | switch (sshdr.asc) { |
2190 | case 0x10: /* DIX: Host detected corruption */ |
2191 | good_bytes = sd_completed_bytes(scmd: SCpnt); |
2192 | break; |
2193 | case 0x20: /* INVALID COMMAND OPCODE */ |
2194 | case 0x24: /* INVALID FIELD IN CDB */ |
2195 | switch (SCpnt->cmnd[0]) { |
2196 | case UNMAP: |
2197 | sd_config_discard(sdkp, mode: SD_LBP_DISABLE); |
2198 | break; |
2199 | case WRITE_SAME_16: |
2200 | case WRITE_SAME: |
2201 | if (SCpnt->cmnd[1] & 8) { /* UNMAP */ |
2202 | sd_config_discard(sdkp, mode: SD_LBP_DISABLE); |
2203 | } else { |
2204 | sdkp->device->no_write_same = 1; |
2205 | sd_config_write_same(sdkp); |
2206 | req->rq_flags |= RQF_QUIET; |
2207 | } |
2208 | break; |
2209 | } |
2210 | } |
2211 | break; |
2212 | default: |
2213 | break; |
2214 | } |
2215 | |
2216 | out: |
2217 | if (sd_is_zoned(sdkp)) |
2218 | good_bytes = sd_zbc_complete(cmd: SCpnt, good_bytes, sshdr: &sshdr); |
2219 | |
2220 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
2221 | "sd_done: completed %d of %d bytes\n" , |
2222 | good_bytes, scsi_bufflen(SCpnt))); |
2223 | |
2224 | return good_bytes; |
2225 | } |
2226 | |
2227 | /* |
2228 | * spinup disk - called only in sd_revalidate_disk() |
2229 | */ |
2230 | static void |
2231 | sd_spinup_disk(struct scsi_disk *sdkp) |
2232 | { |
2233 | unsigned char cmd[10]; |
2234 | unsigned long spintime_expire = 0; |
2235 | int retries, spintime; |
2236 | unsigned int the_result; |
2237 | struct scsi_sense_hdr sshdr; |
2238 | const struct scsi_exec_args exec_args = { |
2239 | .sshdr = &sshdr, |
2240 | }; |
2241 | int sense_valid = 0; |
2242 | |
2243 | spintime = 0; |
2244 | |
2245 | /* Spin up drives, as required. Only do this at boot time */ |
2246 | /* Spinup needs to be done for module loads too. */ |
2247 | do { |
2248 | retries = 0; |
2249 | |
2250 | do { |
2251 | bool media_was_present = sdkp->media_present; |
2252 | |
2253 | cmd[0] = TEST_UNIT_READY; |
2254 | memset((void *) &cmd[1], 0, 9); |
2255 | |
2256 | the_result = scsi_execute_cmd(sdev: sdkp->device, cmd, |
2257 | opf: REQ_OP_DRV_IN, NULL, bufflen: 0, |
2258 | SD_TIMEOUT, |
2259 | retries: sdkp->max_retries, |
2260 | args: &exec_args); |
2261 | |
2262 | if (the_result > 0) { |
2263 | /* |
2264 | * If the drive has indicated to us that it |
2265 | * doesn't have any media in it, don't bother |
2266 | * with any more polling. |
2267 | */ |
2268 | if (media_not_present(sdkp, sshdr: &sshdr)) { |
2269 | if (media_was_present) |
2270 | sd_printk(KERN_NOTICE, sdkp, |
2271 | "Media removed, stopped polling\n" ); |
2272 | return; |
2273 | } |
2274 | |
2275 | sense_valid = scsi_sense_valid(sshdr: &sshdr); |
2276 | } |
2277 | retries++; |
2278 | } while (retries < 3 && |
2279 | (!scsi_status_is_good(status: the_result) || |
2280 | (scsi_status_is_check_condition(status: the_result) && |
2281 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); |
2282 | |
2283 | if (!scsi_status_is_check_condition(status: the_result)) { |
2284 | /* no sense, TUR either succeeded or failed |
2285 | * with a status error */ |
2286 | if(!spintime && !scsi_status_is_good(status: the_result)) { |
2287 | sd_print_result(sdkp, msg: "Test Unit Ready failed" , |
2288 | result: the_result); |
2289 | } |
2290 | break; |
2291 | } |
2292 | |
2293 | /* |
2294 | * The device does not want the automatic start to be issued. |
2295 | */ |
2296 | if (sdkp->device->no_start_on_add) |
2297 | break; |
2298 | |
2299 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
2300 | if (sshdr.asc == 4 && sshdr.ascq == 3) |
2301 | break; /* manual intervention required */ |
2302 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) |
2303 | break; /* standby */ |
2304 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) |
2305 | break; /* unavailable */ |
2306 | if (sshdr.asc == 4 && sshdr.ascq == 0x1b) |
2307 | break; /* sanitize in progress */ |
2308 | if (sshdr.asc == 4 && sshdr.ascq == 0x24) |
2309 | break; /* depopulation in progress */ |
2310 | if (sshdr.asc == 4 && sshdr.ascq == 0x25) |
2311 | break; /* depopulation restoration in progress */ |
2312 | /* |
2313 | * Issue command to spin up drive when not ready |
2314 | */ |
2315 | if (!spintime) { |
2316 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..." ); |
2317 | cmd[0] = START_STOP; |
2318 | cmd[1] = 1; /* Return immediately */ |
2319 | memset((void *) &cmd[2], 0, 8); |
2320 | cmd[4] = 1; /* Start spin cycle */ |
2321 | if (sdkp->device->start_stop_pwr_cond) |
2322 | cmd[4] |= 1 << 4; |
2323 | scsi_execute_cmd(sdev: sdkp->device, cmd, |
2324 | opf: REQ_OP_DRV_IN, NULL, bufflen: 0, |
2325 | SD_TIMEOUT, retries: sdkp->max_retries, |
2326 | args: &exec_args); |
2327 | spintime_expire = jiffies + 100 * HZ; |
2328 | spintime = 1; |
2329 | } |
2330 | /* Wait 1 second for next try */ |
2331 | msleep(msecs: 1000); |
2332 | printk(KERN_CONT "." ); |
2333 | |
2334 | /* |
2335 | * Wait for USB flash devices with slow firmware. |
2336 | * Yes, this sense key/ASC combination shouldn't |
2337 | * occur here. It's characteristic of these devices. |
2338 | */ |
2339 | } else if (sense_valid && |
2340 | sshdr.sense_key == UNIT_ATTENTION && |
2341 | sshdr.asc == 0x28) { |
2342 | if (!spintime) { |
2343 | spintime_expire = jiffies + 5 * HZ; |
2344 | spintime = 1; |
2345 | } |
2346 | /* Wait 1 second for next try */ |
2347 | msleep(msecs: 1000); |
2348 | } else { |
2349 | /* we don't understand the sense code, so it's |
2350 | * probably pointless to loop */ |
2351 | if(!spintime) { |
2352 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n" ); |
2353 | sd_print_sense_hdr(sdkp, sshdr: &sshdr); |
2354 | } |
2355 | break; |
2356 | } |
2357 | |
2358 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
2359 | |
2360 | if (spintime) { |
2361 | if (scsi_status_is_good(status: the_result)) |
2362 | printk(KERN_CONT "ready\n" ); |
2363 | else |
2364 | printk(KERN_CONT "not responding...\n" ); |
2365 | } |
2366 | } |
2367 | |
2368 | /* |
2369 | * Determine whether disk supports Data Integrity Field. |
2370 | */ |
2371 | static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
2372 | { |
2373 | struct scsi_device *sdp = sdkp->device; |
2374 | u8 type; |
2375 | |
2376 | if (scsi_device_protection(sdev: sdp) == 0 || (buffer[12] & 1) == 0) { |
2377 | sdkp->protection_type = 0; |
2378 | return 0; |
2379 | } |
2380 | |
2381 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ |
2382 | |
2383 | if (type > T10_PI_TYPE3_PROTECTION) { |
2384 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \ |
2385 | " protection type %u. Disabling disk!\n" , |
2386 | type); |
2387 | sdkp->protection_type = 0; |
2388 | return -ENODEV; |
2389 | } |
2390 | |
2391 | sdkp->protection_type = type; |
2392 | |
2393 | return 0; |
2394 | } |
2395 | |
2396 | static void sd_config_protection(struct scsi_disk *sdkp) |
2397 | { |
2398 | struct scsi_device *sdp = sdkp->device; |
2399 | |
2400 | sd_dif_config_host(sdkp); |
2401 | |
2402 | if (!sdkp->protection_type) |
2403 | return; |
2404 | |
2405 | if (!scsi_host_dif_capable(shost: sdp->host, target_type: sdkp->protection_type)) { |
2406 | sd_first_printk(KERN_NOTICE, sdkp, |
2407 | "Disabling DIF Type %u protection\n" , |
2408 | sdkp->protection_type); |
2409 | sdkp->protection_type = 0; |
2410 | } |
2411 | |
2412 | sd_first_printk(KERN_NOTICE, sdkp, "Enabling DIF Type %u protection\n" , |
2413 | sdkp->protection_type); |
2414 | } |
2415 | |
2416 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2417 | struct scsi_sense_hdr *sshdr, int sense_valid, |
2418 | int the_result) |
2419 | { |
2420 | if (sense_valid) |
2421 | sd_print_sense_hdr(sdkp, sshdr); |
2422 | else |
2423 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n" ); |
2424 | |
2425 | /* |
2426 | * Set dirty bit for removable devices if not ready - |
2427 | * sometimes drives will not report this properly. |
2428 | */ |
2429 | if (sdp->removable && |
2430 | sense_valid && sshdr->sense_key == NOT_READY) |
2431 | set_media_not_present(sdkp); |
2432 | |
2433 | /* |
2434 | * We used to set media_present to 0 here to indicate no media |
2435 | * in the drive, but some drives fail read capacity even with |
2436 | * media present, so we can't do that. |
2437 | */ |
2438 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ |
2439 | } |
2440 | |
2441 | #define RC16_LEN 32 |
2442 | #if RC16_LEN > SD_BUF_SIZE |
2443 | #error RC16_LEN must not be more than SD_BUF_SIZE |
2444 | #endif |
2445 | |
2446 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
2447 | |
2448 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2449 | unsigned char *buffer) |
2450 | { |
2451 | unsigned char cmd[16]; |
2452 | struct scsi_sense_hdr sshdr; |
2453 | const struct scsi_exec_args exec_args = { |
2454 | .sshdr = &sshdr, |
2455 | }; |
2456 | int sense_valid = 0; |
2457 | int the_result; |
2458 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
2459 | unsigned int alignment; |
2460 | unsigned long long lba; |
2461 | unsigned sector_size; |
2462 | |
2463 | if (sdp->no_read_capacity_16) |
2464 | return -EINVAL; |
2465 | |
2466 | do { |
2467 | memset(cmd, 0, 16); |
2468 | cmd[0] = SERVICE_ACTION_IN_16; |
2469 | cmd[1] = SAI_READ_CAPACITY_16; |
2470 | cmd[13] = RC16_LEN; |
2471 | memset(buffer, 0, RC16_LEN); |
2472 | |
2473 | the_result = scsi_execute_cmd(sdev: sdp, cmd, opf: REQ_OP_DRV_IN, |
2474 | buffer, RC16_LEN, SD_TIMEOUT, |
2475 | retries: sdkp->max_retries, args: &exec_args); |
2476 | if (the_result > 0) { |
2477 | if (media_not_present(sdkp, sshdr: &sshdr)) |
2478 | return -ENODEV; |
2479 | |
2480 | sense_valid = scsi_sense_valid(sshdr: &sshdr); |
2481 | if (sense_valid && |
2482 | sshdr.sense_key == ILLEGAL_REQUEST && |
2483 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && |
2484 | sshdr.ascq == 0x00) |
2485 | /* Invalid Command Operation Code or |
2486 | * Invalid Field in CDB, just retry |
2487 | * silently with RC10 */ |
2488 | return -EINVAL; |
2489 | if (sense_valid && |
2490 | sshdr.sense_key == UNIT_ATTENTION && |
2491 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) |
2492 | /* Device reset might occur several times, |
2493 | * give it one more chance */ |
2494 | if (--reset_retries > 0) |
2495 | continue; |
2496 | } |
2497 | retries--; |
2498 | |
2499 | } while (the_result && retries); |
2500 | |
2501 | if (the_result) { |
2502 | sd_print_result(sdkp, msg: "Read Capacity(16) failed" , result: the_result); |
2503 | read_capacity_error(sdkp, sdp, sshdr: &sshdr, sense_valid, the_result); |
2504 | return -EINVAL; |
2505 | } |
2506 | |
2507 | sector_size = get_unaligned_be32(p: &buffer[8]); |
2508 | lba = get_unaligned_be64(p: &buffer[0]); |
2509 | |
2510 | if (sd_read_protection_type(sdkp, buffer) < 0) { |
2511 | sdkp->capacity = 0; |
2512 | return -ENODEV; |
2513 | } |
2514 | |
2515 | /* Logical blocks per physical block exponent */ |
2516 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
2517 | |
2518 | /* RC basis */ |
2519 | sdkp->rc_basis = (buffer[12] >> 4) & 0x3; |
2520 | |
2521 | /* Lowest aligned logical block */ |
2522 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; |
2523 | blk_queue_alignment_offset(q: sdp->request_queue, alignment); |
2524 | if (alignment && sdkp->first_scan) |
2525 | sd_printk(KERN_NOTICE, sdkp, |
2526 | "physical block alignment offset: %u\n" , alignment); |
2527 | |
2528 | if (buffer[14] & 0x80) { /* LBPME */ |
2529 | sdkp->lbpme = 1; |
2530 | |
2531 | if (buffer[14] & 0x40) /* LBPRZ */ |
2532 | sdkp->lbprz = 1; |
2533 | |
2534 | sd_config_discard(sdkp, mode: SD_LBP_WS16); |
2535 | } |
2536 | |
2537 | sdkp->capacity = lba + 1; |
2538 | return sector_size; |
2539 | } |
2540 | |
2541 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2542 | unsigned char *buffer) |
2543 | { |
2544 | unsigned char cmd[16]; |
2545 | struct scsi_sense_hdr sshdr; |
2546 | const struct scsi_exec_args exec_args = { |
2547 | .sshdr = &sshdr, |
2548 | }; |
2549 | int sense_valid = 0; |
2550 | int the_result; |
2551 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
2552 | sector_t lba; |
2553 | unsigned sector_size; |
2554 | |
2555 | do { |
2556 | cmd[0] = READ_CAPACITY; |
2557 | memset(&cmd[1], 0, 9); |
2558 | memset(buffer, 0, 8); |
2559 | |
2560 | the_result = scsi_execute_cmd(sdev: sdp, cmd, opf: REQ_OP_DRV_IN, buffer, |
2561 | bufflen: 8, SD_TIMEOUT, retries: sdkp->max_retries, |
2562 | args: &exec_args); |
2563 | |
2564 | if (media_not_present(sdkp, sshdr: &sshdr)) |
2565 | return -ENODEV; |
2566 | |
2567 | if (the_result > 0) { |
2568 | sense_valid = scsi_sense_valid(sshdr: &sshdr); |
2569 | if (sense_valid && |
2570 | sshdr.sense_key == UNIT_ATTENTION && |
2571 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) |
2572 | /* Device reset might occur several times, |
2573 | * give it one more chance */ |
2574 | if (--reset_retries > 0) |
2575 | continue; |
2576 | } |
2577 | retries--; |
2578 | |
2579 | } while (the_result && retries); |
2580 | |
2581 | if (the_result) { |
2582 | sd_print_result(sdkp, msg: "Read Capacity(10) failed" , result: the_result); |
2583 | read_capacity_error(sdkp, sdp, sshdr: &sshdr, sense_valid, the_result); |
2584 | return -EINVAL; |
2585 | } |
2586 | |
2587 | sector_size = get_unaligned_be32(p: &buffer[4]); |
2588 | lba = get_unaligned_be32(p: &buffer[0]); |
2589 | |
2590 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
2591 | /* Some buggy (usb cardreader) devices return an lba of |
2592 | 0xffffffff when the want to report a size of 0 (with |
2593 | which they really mean no media is present) */ |
2594 | sdkp->capacity = 0; |
2595 | sdkp->physical_block_size = sector_size; |
2596 | return sector_size; |
2597 | } |
2598 | |
2599 | sdkp->capacity = lba + 1; |
2600 | sdkp->physical_block_size = sector_size; |
2601 | return sector_size; |
2602 | } |
2603 | |
2604 | static int sd_try_rc16_first(struct scsi_device *sdp) |
2605 | { |
2606 | if (sdp->host->max_cmd_len < 16) |
2607 | return 0; |
2608 | if (sdp->try_rc_10_first) |
2609 | return 0; |
2610 | if (sdp->scsi_level > SCSI_SPC_2) |
2611 | return 1; |
2612 | if (scsi_device_protection(sdev: sdp)) |
2613 | return 1; |
2614 | return 0; |
2615 | } |
2616 | |
2617 | /* |
2618 | * read disk capacity |
2619 | */ |
2620 | static void |
2621 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) |
2622 | { |
2623 | int sector_size; |
2624 | struct scsi_device *sdp = sdkp->device; |
2625 | |
2626 | if (sd_try_rc16_first(sdp)) { |
2627 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
2628 | if (sector_size == -EOVERFLOW) |
2629 | goto got_data; |
2630 | if (sector_size == -ENODEV) |
2631 | return; |
2632 | if (sector_size < 0) |
2633 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
2634 | if (sector_size < 0) |
2635 | return; |
2636 | } else { |
2637 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
2638 | if (sector_size == -EOVERFLOW) |
2639 | goto got_data; |
2640 | if (sector_size < 0) |
2641 | return; |
2642 | if ((sizeof(sdkp->capacity) > 4) && |
2643 | (sdkp->capacity > 0xffffffffULL)) { |
2644 | int old_sector_size = sector_size; |
2645 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " |
2646 | "Trying to use READ CAPACITY(16).\n" ); |
2647 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
2648 | if (sector_size < 0) { |
2649 | sd_printk(KERN_NOTICE, sdkp, |
2650 | "Using 0xffffffff as device size\n" ); |
2651 | sdkp->capacity = 1 + (sector_t) 0xffffffff; |
2652 | sector_size = old_sector_size; |
2653 | goto got_data; |
2654 | } |
2655 | /* Remember that READ CAPACITY(16) succeeded */ |
2656 | sdp->try_rc_10_first = 0; |
2657 | } |
2658 | } |
2659 | |
2660 | /* Some devices are known to return the total number of blocks, |
2661 | * not the highest block number. Some devices have versions |
2662 | * which do this and others which do not. Some devices we might |
2663 | * suspect of doing this but we don't know for certain. |
2664 | * |
2665 | * If we know the reported capacity is wrong, decrement it. If |
2666 | * we can only guess, then assume the number of blocks is even |
2667 | * (usually true but not always) and err on the side of lowering |
2668 | * the capacity. |
2669 | */ |
2670 | if (sdp->fix_capacity || |
2671 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { |
2672 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " |
2673 | "from its reported value: %llu\n" , |
2674 | (unsigned long long) sdkp->capacity); |
2675 | --sdkp->capacity; |
2676 | } |
2677 | |
2678 | got_data: |
2679 | if (sector_size == 0) { |
2680 | sector_size = 512; |
2681 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
2682 | "assuming 512.\n" ); |
2683 | } |
2684 | |
2685 | if (sector_size != 512 && |
2686 | sector_size != 1024 && |
2687 | sector_size != 2048 && |
2688 | sector_size != 4096) { |
2689 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n" , |
2690 | sector_size); |
2691 | /* |
2692 | * The user might want to re-format the drive with |
2693 | * a supported sectorsize. Once this happens, it |
2694 | * would be relatively trivial to set the thing up. |
2695 | * For this reason, we leave the thing in the table. |
2696 | */ |
2697 | sdkp->capacity = 0; |
2698 | /* |
2699 | * set a bogus sector size so the normal read/write |
2700 | * logic in the block layer will eventually refuse any |
2701 | * request on this device without tripping over power |
2702 | * of two sector size assumptions |
2703 | */ |
2704 | sector_size = 512; |
2705 | } |
2706 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
2707 | blk_queue_physical_block_size(sdp->request_queue, |
2708 | sdkp->physical_block_size); |
2709 | sdkp->device->sector_size = sector_size; |
2710 | |
2711 | if (sdkp->capacity > 0xffffffff) |
2712 | sdp->use_16_for_rw = 1; |
2713 | |
2714 | } |
2715 | |
2716 | /* |
2717 | * Print disk capacity |
2718 | */ |
2719 | static void |
2720 | sd_print_capacity(struct scsi_disk *sdkp, |
2721 | sector_t old_capacity) |
2722 | { |
2723 | int sector_size = sdkp->device->sector_size; |
2724 | char cap_str_2[10], cap_str_10[10]; |
2725 | |
2726 | if (!sdkp->first_scan && old_capacity == sdkp->capacity) |
2727 | return; |
2728 | |
2729 | string_get_size(size: sdkp->capacity, blk_size: sector_size, |
2730 | units: STRING_UNITS_2, buf: cap_str_2, len: sizeof(cap_str_2)); |
2731 | string_get_size(size: sdkp->capacity, blk_size: sector_size, |
2732 | units: STRING_UNITS_10, buf: cap_str_10, len: sizeof(cap_str_10)); |
2733 | |
2734 | sd_printk(KERN_NOTICE, sdkp, |
2735 | "%llu %d-byte logical blocks: (%s/%s)\n" , |
2736 | (unsigned long long)sdkp->capacity, |
2737 | sector_size, cap_str_10, cap_str_2); |
2738 | |
2739 | if (sdkp->physical_block_size != sector_size) |
2740 | sd_printk(KERN_NOTICE, sdkp, |
2741 | "%u-byte physical blocks\n" , |
2742 | sdkp->physical_block_size); |
2743 | } |
2744 | |
2745 | /* called with buffer of length 512 */ |
2746 | static inline int |
2747 | sd_do_mode_sense(struct scsi_disk *sdkp, int dbd, int modepage, |
2748 | unsigned char *buffer, int len, struct scsi_mode_data *data, |
2749 | struct scsi_sense_hdr *sshdr) |
2750 | { |
2751 | /* |
2752 | * If we must use MODE SENSE(10), make sure that the buffer length |
2753 | * is at least 8 bytes so that the mode sense header fits. |
2754 | */ |
2755 | if (sdkp->device->use_10_for_ms && len < 8) |
2756 | len = 8; |
2757 | |
2758 | return scsi_mode_sense(sdev: sdkp->device, dbd, modepage, subpage: 0, buffer, len, |
2759 | SD_TIMEOUT, retries: sdkp->max_retries, data, sshdr); |
2760 | } |
2761 | |
2762 | /* |
2763 | * read write protect setting, if possible - called only in sd_revalidate_disk() |
2764 | * called with buffer of length SD_BUF_SIZE |
2765 | */ |
2766 | static void |
2767 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
2768 | { |
2769 | int res; |
2770 | struct scsi_device *sdp = sdkp->device; |
2771 | struct scsi_mode_data data; |
2772 | int old_wp = sdkp->write_prot; |
2773 | |
2774 | set_disk_ro(disk: sdkp->disk, read_only: 0); |
2775 | if (sdp->skip_ms_page_3f) { |
2776 | sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n" ); |
2777 | return; |
2778 | } |
2779 | |
2780 | if (sdp->use_192_bytes_for_3f) { |
2781 | res = sd_do_mode_sense(sdkp, dbd: 0, modepage: 0x3F, buffer, len: 192, data: &data, NULL); |
2782 | } else { |
2783 | /* |
2784 | * First attempt: ask for all pages (0x3F), but only 4 bytes. |
2785 | * We have to start carefully: some devices hang if we ask |
2786 | * for more than is available. |
2787 | */ |
2788 | res = sd_do_mode_sense(sdkp, dbd: 0, modepage: 0x3F, buffer, len: 4, data: &data, NULL); |
2789 | |
2790 | /* |
2791 | * Second attempt: ask for page 0 When only page 0 is |
2792 | * implemented, a request for page 3F may return Sense Key |
2793 | * 5: Illegal Request, Sense Code 24: Invalid field in |
2794 | * CDB. |
2795 | */ |
2796 | if (res < 0) |
2797 | res = sd_do_mode_sense(sdkp, dbd: 0, modepage: 0, buffer, len: 4, data: &data, NULL); |
2798 | |
2799 | /* |
2800 | * Third attempt: ask 255 bytes, as we did earlier. |
2801 | */ |
2802 | if (res < 0) |
2803 | res = sd_do_mode_sense(sdkp, dbd: 0, modepage: 0x3F, buffer, len: 255, |
2804 | data: &data, NULL); |
2805 | } |
2806 | |
2807 | if (res < 0) { |
2808 | sd_first_printk(KERN_WARNING, sdkp, |
2809 | "Test WP failed, assume Write Enabled\n" ); |
2810 | } else { |
2811 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); |
2812 | set_disk_ro(disk: sdkp->disk, read_only: sdkp->write_prot); |
2813 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
2814 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n" , |
2815 | sdkp->write_prot ? "on" : "off" ); |
2816 | sd_printk(KERN_DEBUG, sdkp, "Mode Sense: %4ph\n" , buffer); |
2817 | } |
2818 | } |
2819 | } |
2820 | |
2821 | /* |
2822 | * sd_read_cache_type - called only from sd_revalidate_disk() |
2823 | * called with buffer of length SD_BUF_SIZE |
2824 | */ |
2825 | static void |
2826 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
2827 | { |
2828 | int len = 0, res; |
2829 | struct scsi_device *sdp = sdkp->device; |
2830 | |
2831 | int dbd; |
2832 | int modepage; |
2833 | int first_len; |
2834 | struct scsi_mode_data data; |
2835 | struct scsi_sense_hdr sshdr; |
2836 | int old_wce = sdkp->WCE; |
2837 | int old_rcd = sdkp->RCD; |
2838 | int old_dpofua = sdkp->DPOFUA; |
2839 | |
2840 | |
2841 | if (sdkp->cache_override) |
2842 | return; |
2843 | |
2844 | first_len = 4; |
2845 | if (sdp->skip_ms_page_8) { |
2846 | if (sdp->type == TYPE_RBC) |
2847 | goto defaults; |
2848 | else { |
2849 | if (sdp->skip_ms_page_3f) |
2850 | goto defaults; |
2851 | modepage = 0x3F; |
2852 | if (sdp->use_192_bytes_for_3f) |
2853 | first_len = 192; |
2854 | dbd = 0; |
2855 | } |
2856 | } else if (sdp->type == TYPE_RBC) { |
2857 | modepage = 6; |
2858 | dbd = 8; |
2859 | } else { |
2860 | modepage = 8; |
2861 | dbd = 0; |
2862 | } |
2863 | |
2864 | /* cautiously ask */ |
2865 | res = sd_do_mode_sense(sdkp, dbd, modepage, buffer, len: first_len, |
2866 | data: &data, sshdr: &sshdr); |
2867 | |
2868 | if (res < 0) |
2869 | goto bad_sense; |
2870 | |
2871 | if (!data.header_length) { |
2872 | modepage = 6; |
2873 | first_len = 0; |
2874 | sd_first_printk(KERN_ERR, sdkp, |
2875 | "Missing header in MODE_SENSE response\n" ); |
2876 | } |
2877 | |
2878 | /* that went OK, now ask for the proper length */ |
2879 | len = data.length; |
2880 | |
2881 | /* |
2882 | * We're only interested in the first three bytes, actually. |
2883 | * But the data cache page is defined for the first 20. |
2884 | */ |
2885 | if (len < 3) |
2886 | goto bad_sense; |
2887 | else if (len > SD_BUF_SIZE) { |
2888 | sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " |
2889 | "data from %d to %d bytes\n" , len, SD_BUF_SIZE); |
2890 | len = SD_BUF_SIZE; |
2891 | } |
2892 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) |
2893 | len = 192; |
2894 | |
2895 | /* Get the data */ |
2896 | if (len > first_len) |
2897 | res = sd_do_mode_sense(sdkp, dbd, modepage, buffer, len, |
2898 | data: &data, sshdr: &sshdr); |
2899 | |
2900 | if (!res) { |
2901 | int offset = data.header_length + data.block_descriptor_length; |
2902 | |
2903 | while (offset < len) { |
2904 | u8 page_code = buffer[offset] & 0x3F; |
2905 | u8 spf = buffer[offset] & 0x40; |
2906 | |
2907 | if (page_code == 8 || page_code == 6) { |
2908 | /* We're interested only in the first 3 bytes. |
2909 | */ |
2910 | if (len - offset <= 2) { |
2911 | sd_first_printk(KERN_ERR, sdkp, |
2912 | "Incomplete mode parameter " |
2913 | "data\n" ); |
2914 | goto defaults; |
2915 | } else { |
2916 | modepage = page_code; |
2917 | goto Page_found; |
2918 | } |
2919 | } else { |
2920 | /* Go to the next page */ |
2921 | if (spf && len - offset > 3) |
2922 | offset += 4 + (buffer[offset+2] << 8) + |
2923 | buffer[offset+3]; |
2924 | else if (!spf && len - offset > 1) |
2925 | offset += 2 + buffer[offset+1]; |
2926 | else { |
2927 | sd_first_printk(KERN_ERR, sdkp, |
2928 | "Incomplete mode " |
2929 | "parameter data\n" ); |
2930 | goto defaults; |
2931 | } |
2932 | } |
2933 | } |
2934 | |
2935 | sd_first_printk(KERN_WARNING, sdkp, |
2936 | "No Caching mode page found\n" ); |
2937 | goto defaults; |
2938 | |
2939 | Page_found: |
2940 | if (modepage == 8) { |
2941 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); |
2942 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); |
2943 | } else { |
2944 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); |
2945 | sdkp->RCD = 0; |
2946 | } |
2947 | |
2948 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
2949 | if (sdp->broken_fua) { |
2950 | sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n" ); |
2951 | sdkp->DPOFUA = 0; |
2952 | } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw && |
2953 | !sdkp->device->use_16_for_rw) { |
2954 | sd_first_printk(KERN_NOTICE, sdkp, |
2955 | "Uses READ/WRITE(6), disabling FUA\n" ); |
2956 | sdkp->DPOFUA = 0; |
2957 | } |
2958 | |
2959 | /* No cache flush allowed for write protected devices */ |
2960 | if (sdkp->WCE && sdkp->write_prot) |
2961 | sdkp->WCE = 0; |
2962 | |
2963 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
2964 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) |
2965 | sd_printk(KERN_NOTICE, sdkp, |
2966 | "Write cache: %s, read cache: %s, %s\n" , |
2967 | sdkp->WCE ? "enabled" : "disabled" , |
2968 | sdkp->RCD ? "disabled" : "enabled" , |
2969 | sdkp->DPOFUA ? "supports DPO and FUA" |
2970 | : "doesn't support DPO or FUA" ); |
2971 | |
2972 | return; |
2973 | } |
2974 | |
2975 | bad_sense: |
2976 | if (res == -EIO && scsi_sense_valid(sshdr: &sshdr) && |
2977 | sshdr.sense_key == ILLEGAL_REQUEST && |
2978 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) |
2979 | /* Invalid field in CDB */ |
2980 | sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n" ); |
2981 | else |
2982 | sd_first_printk(KERN_ERR, sdkp, |
2983 | "Asking for cache data failed\n" ); |
2984 | |
2985 | defaults: |
2986 | if (sdp->wce_default_on) { |
2987 | sd_first_printk(KERN_NOTICE, sdkp, |
2988 | "Assuming drive cache: write back\n" ); |
2989 | sdkp->WCE = 1; |
2990 | } else { |
2991 | sd_first_printk(KERN_WARNING, sdkp, |
2992 | "Assuming drive cache: write through\n" ); |
2993 | sdkp->WCE = 0; |
2994 | } |
2995 | sdkp->RCD = 0; |
2996 | sdkp->DPOFUA = 0; |
2997 | } |
2998 | |
2999 | /* |
3000 | * The ATO bit indicates whether the DIF application tag is available |
3001 | * for use by the operating system. |
3002 | */ |
3003 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
3004 | { |
3005 | int res, offset; |
3006 | struct scsi_device *sdp = sdkp->device; |
3007 | struct scsi_mode_data data; |
3008 | struct scsi_sense_hdr sshdr; |
3009 | |
3010 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
3011 | return; |
3012 | |
3013 | if (sdkp->protection_type == 0) |
3014 | return; |
3015 | |
3016 | res = scsi_mode_sense(sdev: sdp, dbd: 1, modepage: 0x0a, subpage: 0, buffer, len: 36, SD_TIMEOUT, |
3017 | retries: sdkp->max_retries, data: &data, &sshdr); |
3018 | |
3019 | if (res < 0 || !data.header_length || |
3020 | data.length < 6) { |
3021 | sd_first_printk(KERN_WARNING, sdkp, |
3022 | "getting Control mode page failed, assume no ATO\n" ); |
3023 | |
3024 | if (res == -EIO && scsi_sense_valid(sshdr: &sshdr)) |
3025 | sd_print_sense_hdr(sdkp, sshdr: &sshdr); |
3026 | |
3027 | return; |
3028 | } |
3029 | |
3030 | offset = data.header_length + data.block_descriptor_length; |
3031 | |
3032 | if ((buffer[offset] & 0x3f) != 0x0a) { |
3033 | sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n" ); |
3034 | return; |
3035 | } |
3036 | |
3037 | if ((buffer[offset + 5] & 0x80) == 0) |
3038 | return; |
3039 | |
3040 | sdkp->ATO = 1; |
3041 | |
3042 | return; |
3043 | } |
3044 | |
3045 | /** |
3046 | * sd_read_block_limits - Query disk device for preferred I/O sizes. |
3047 | * @sdkp: disk to query |
3048 | */ |
3049 | static void sd_read_block_limits(struct scsi_disk *sdkp) |
3050 | { |
3051 | struct scsi_vpd *vpd; |
3052 | |
3053 | rcu_read_lock(); |
3054 | |
3055 | vpd = rcu_dereference(sdkp->device->vpd_pgb0); |
3056 | if (!vpd || vpd->len < 16) |
3057 | goto out; |
3058 | |
3059 | sdkp->min_xfer_blocks = get_unaligned_be16(p: &vpd->data[6]); |
3060 | sdkp->max_xfer_blocks = get_unaligned_be32(p: &vpd->data[8]); |
3061 | sdkp->opt_xfer_blocks = get_unaligned_be32(p: &vpd->data[12]); |
3062 | |
3063 | if (vpd->len >= 64) { |
3064 | unsigned int lba_count, desc_count; |
3065 | |
3066 | sdkp->max_ws_blocks = (u32)get_unaligned_be64(p: &vpd->data[36]); |
3067 | |
3068 | if (!sdkp->lbpme) |
3069 | goto out; |
3070 | |
3071 | lba_count = get_unaligned_be32(p: &vpd->data[20]); |
3072 | desc_count = get_unaligned_be32(p: &vpd->data[24]); |
3073 | |
3074 | if (lba_count && desc_count) |
3075 | sdkp->max_unmap_blocks = lba_count; |
3076 | |
3077 | sdkp->unmap_granularity = get_unaligned_be32(p: &vpd->data[28]); |
3078 | |
3079 | if (vpd->data[32] & 0x80) |
3080 | sdkp->unmap_alignment = |
3081 | get_unaligned_be32(p: &vpd->data[32]) & ~(1 << 31); |
3082 | |
3083 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ |
3084 | |
3085 | if (sdkp->max_unmap_blocks) |
3086 | sd_config_discard(sdkp, mode: SD_LBP_UNMAP); |
3087 | else |
3088 | sd_config_discard(sdkp, mode: SD_LBP_WS16); |
3089 | |
3090 | } else { /* LBP VPD page tells us what to use */ |
3091 | if (sdkp->lbpu && sdkp->max_unmap_blocks) |
3092 | sd_config_discard(sdkp, mode: SD_LBP_UNMAP); |
3093 | else if (sdkp->lbpws) |
3094 | sd_config_discard(sdkp, mode: SD_LBP_WS16); |
3095 | else if (sdkp->lbpws10) |
3096 | sd_config_discard(sdkp, mode: SD_LBP_WS10); |
3097 | else |
3098 | sd_config_discard(sdkp, mode: SD_LBP_DISABLE); |
3099 | } |
3100 | } |
3101 | |
3102 | out: |
3103 | rcu_read_unlock(); |
3104 | } |
3105 | |
3106 | /** |
3107 | * sd_read_block_characteristics - Query block dev. characteristics |
3108 | * @sdkp: disk to query |
3109 | */ |
3110 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) |
3111 | { |
3112 | struct request_queue *q = sdkp->disk->queue; |
3113 | struct scsi_vpd *vpd; |
3114 | u16 rot; |
3115 | u8 zoned; |
3116 | |
3117 | rcu_read_lock(); |
3118 | vpd = rcu_dereference(sdkp->device->vpd_pgb1); |
3119 | |
3120 | if (!vpd || vpd->len < 8) { |
3121 | rcu_read_unlock(); |
3122 | return; |
3123 | } |
3124 | |
3125 | rot = get_unaligned_be16(p: &vpd->data[4]); |
3126 | zoned = (vpd->data[8] >> 4) & 3; |
3127 | rcu_read_unlock(); |
3128 | |
3129 | if (rot == 1) { |
3130 | blk_queue_flag_set(QUEUE_FLAG_NONROT, q); |
3131 | blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q); |
3132 | } |
3133 | |
3134 | if (sdkp->device->type == TYPE_ZBC) { |
3135 | /* |
3136 | * Host-managed: Per ZBC and ZAC specifications, writes in |
3137 | * sequential write required zones of host-managed devices must |
3138 | * be aligned to the device physical block size. |
3139 | */ |
3140 | disk_set_zoned(disk: sdkp->disk, model: BLK_ZONED_HM); |
3141 | blk_queue_zone_write_granularity(q, size: sdkp->physical_block_size); |
3142 | } else { |
3143 | sdkp->zoned = zoned; |
3144 | if (sdkp->zoned == 1) { |
3145 | /* Host-aware */ |
3146 | disk_set_zoned(disk: sdkp->disk, model: BLK_ZONED_HA); |
3147 | } else { |
3148 | /* Regular disk or drive managed disk */ |
3149 | disk_set_zoned(disk: sdkp->disk, model: BLK_ZONED_NONE); |
3150 | } |
3151 | } |
3152 | |
3153 | if (!sdkp->first_scan) |
3154 | return; |
3155 | |
3156 | if (blk_queue_is_zoned(q)) { |
3157 | sd_printk(KERN_NOTICE, sdkp, "Host-%s zoned block device\n" , |
3158 | q->limits.zoned == BLK_ZONED_HM ? "managed" : "aware" ); |
3159 | } else { |
3160 | if (sdkp->zoned == 1) |
3161 | sd_printk(KERN_NOTICE, sdkp, |
3162 | "Host-aware SMR disk used as regular disk\n" ); |
3163 | else if (sdkp->zoned == 2) |
3164 | sd_printk(KERN_NOTICE, sdkp, |
3165 | "Drive-managed SMR disk\n" ); |
3166 | } |
3167 | } |
3168 | |
3169 | /** |
3170 | * sd_read_block_provisioning - Query provisioning VPD page |
3171 | * @sdkp: disk to query |
3172 | */ |
3173 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
3174 | { |
3175 | struct scsi_vpd *vpd; |
3176 | |
3177 | if (sdkp->lbpme == 0) |
3178 | return; |
3179 | |
3180 | rcu_read_lock(); |
3181 | vpd = rcu_dereference(sdkp->device->vpd_pgb2); |
3182 | |
3183 | if (!vpd || vpd->len < 8) { |
3184 | rcu_read_unlock(); |
3185 | return; |
3186 | } |
3187 | |
3188 | sdkp->lbpvpd = 1; |
3189 | sdkp->lbpu = (vpd->data[5] >> 7) & 1; /* UNMAP */ |
3190 | sdkp->lbpws = (vpd->data[5] >> 6) & 1; /* WRITE SAME(16) w/ UNMAP */ |
3191 | sdkp->lbpws10 = (vpd->data[5] >> 5) & 1; /* WRITE SAME(10) w/ UNMAP */ |
3192 | rcu_read_unlock(); |
3193 | } |
3194 | |
3195 | static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) |
3196 | { |
3197 | struct scsi_device *sdev = sdkp->device; |
3198 | |
3199 | if (sdev->host->no_write_same) { |
3200 | sdev->no_write_same = 1; |
3201 | |
3202 | return; |
3203 | } |
3204 | |
3205 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY, sa: 0) < 0) { |
3206 | struct scsi_vpd *vpd; |
3207 | |
3208 | sdev->no_report_opcodes = 1; |
3209 | |
3210 | /* Disable WRITE SAME if REPORT SUPPORTED OPERATION |
3211 | * CODES is unsupported and the device has an ATA |
3212 | * Information VPD page (SAT). |
3213 | */ |
3214 | rcu_read_lock(); |
3215 | vpd = rcu_dereference(sdev->vpd_pg89); |
3216 | if (vpd) |
3217 | sdev->no_write_same = 1; |
3218 | rcu_read_unlock(); |
3219 | } |
3220 | |
3221 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16, sa: 0) == 1) |
3222 | sdkp->ws16 = 1; |
3223 | |
3224 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME, sa: 0) == 1) |
3225 | sdkp->ws10 = 1; |
3226 | } |
3227 | |
3228 | static void sd_read_security(struct scsi_disk *sdkp, unsigned char *buffer) |
3229 | { |
3230 | struct scsi_device *sdev = sdkp->device; |
3231 | |
3232 | if (!sdev->security_supported) |
3233 | return; |
3234 | |
3235 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, |
3236 | SECURITY_PROTOCOL_IN, sa: 0) == 1 && |
3237 | scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, |
3238 | SECURITY_PROTOCOL_OUT, sa: 0) == 1) |
3239 | sdkp->security = 1; |
3240 | } |
3241 | |
3242 | static inline sector_t sd64_to_sectors(struct scsi_disk *sdkp, u8 *buf) |
3243 | { |
3244 | return logical_to_sectors(sdev: sdkp->device, blocks: get_unaligned_be64(p: buf)); |
3245 | } |
3246 | |
3247 | /** |
3248 | * sd_read_cpr - Query concurrent positioning ranges |
3249 | * @sdkp: disk to query |
3250 | */ |
3251 | static void sd_read_cpr(struct scsi_disk *sdkp) |
3252 | { |
3253 | struct blk_independent_access_ranges *iars = NULL; |
3254 | unsigned char *buffer = NULL; |
3255 | unsigned int nr_cpr = 0; |
3256 | int i, vpd_len, buf_len = SD_BUF_SIZE; |
3257 | u8 *desc; |
3258 | |
3259 | /* |
3260 | * We need to have the capacity set first for the block layer to be |
3261 | * able to check the ranges. |
3262 | */ |
3263 | if (sdkp->first_scan) |
3264 | return; |
3265 | |
3266 | if (!sdkp->capacity) |
3267 | goto out; |
3268 | |
3269 | /* |
3270 | * Concurrent Positioning Ranges VPD: there can be at most 256 ranges, |
3271 | * leading to a maximum page size of 64 + 256*32 bytes. |
3272 | */ |
3273 | buf_len = 64 + 256*32; |
3274 | buffer = kmalloc(size: buf_len, GFP_KERNEL); |
3275 | if (!buffer || scsi_get_vpd_page(sdkp->device, page: 0xb9, buf: buffer, buf_len)) |
3276 | goto out; |
3277 | |
3278 | /* We must have at least a 64B header and one 32B range descriptor */ |
3279 | vpd_len = get_unaligned_be16(p: &buffer[2]) + 4; |
3280 | if (vpd_len > buf_len || vpd_len < 64 + 32 || (vpd_len & 31)) { |
3281 | sd_printk(KERN_ERR, sdkp, |
3282 | "Invalid Concurrent Positioning Ranges VPD page\n" ); |
3283 | goto out; |
3284 | } |
3285 | |
3286 | nr_cpr = (vpd_len - 64) / 32; |
3287 | if (nr_cpr == 1) { |
3288 | nr_cpr = 0; |
3289 | goto out; |
3290 | } |
3291 | |
3292 | iars = disk_alloc_independent_access_ranges(disk: sdkp->disk, nr_ia_ranges: nr_cpr); |
3293 | if (!iars) { |
3294 | nr_cpr = 0; |
3295 | goto out; |
3296 | } |
3297 | |
3298 | desc = &buffer[64]; |
3299 | for (i = 0; i < nr_cpr; i++, desc += 32) { |
3300 | if (desc[0] != i) { |
3301 | sd_printk(KERN_ERR, sdkp, |
3302 | "Invalid Concurrent Positioning Range number\n" ); |
3303 | nr_cpr = 0; |
3304 | break; |
3305 | } |
3306 | |
3307 | iars->ia_range[i].sector = sd64_to_sectors(sdkp, buf: desc + 8); |
3308 | iars->ia_range[i].nr_sectors = sd64_to_sectors(sdkp, buf: desc + 16); |
3309 | } |
3310 | |
3311 | out: |
3312 | disk_set_independent_access_ranges(disk: sdkp->disk, iars); |
3313 | if (nr_cpr && sdkp->nr_actuators != nr_cpr) { |
3314 | sd_printk(KERN_NOTICE, sdkp, |
3315 | "%u concurrent positioning ranges\n" , nr_cpr); |
3316 | sdkp->nr_actuators = nr_cpr; |
3317 | } |
3318 | |
3319 | kfree(objp: buffer); |
3320 | } |
3321 | |
3322 | static bool sd_validate_min_xfer_size(struct scsi_disk *sdkp) |
3323 | { |
3324 | struct scsi_device *sdp = sdkp->device; |
3325 | unsigned int min_xfer_bytes = |
3326 | logical_to_bytes(sdev: sdp, blocks: sdkp->min_xfer_blocks); |
3327 | |
3328 | if (sdkp->min_xfer_blocks == 0) |
3329 | return false; |
3330 | |
3331 | if (min_xfer_bytes & (sdkp->physical_block_size - 1)) { |
3332 | sd_first_printk(KERN_WARNING, sdkp, |
3333 | "Preferred minimum I/O size %u bytes not a " \ |
3334 | "multiple of physical block size (%u bytes)\n" , |
3335 | min_xfer_bytes, sdkp->physical_block_size); |
3336 | sdkp->min_xfer_blocks = 0; |
3337 | return false; |
3338 | } |
3339 | |
3340 | sd_first_printk(KERN_INFO, sdkp, "Preferred minimum I/O size %u bytes\n" , |
3341 | min_xfer_bytes); |
3342 | return true; |
3343 | } |
3344 | |
3345 | /* |
3346 | * Determine the device's preferred I/O size for reads and writes |
3347 | * unless the reported value is unreasonably small, large, not a |
3348 | * multiple of the physical block size, or simply garbage. |
3349 | */ |
3350 | static bool sd_validate_opt_xfer_size(struct scsi_disk *sdkp, |
3351 | unsigned int dev_max) |
3352 | { |
3353 | struct scsi_device *sdp = sdkp->device; |
3354 | unsigned int opt_xfer_bytes = |
3355 | logical_to_bytes(sdev: sdp, blocks: sdkp->opt_xfer_blocks); |
3356 | unsigned int min_xfer_bytes = |
3357 | logical_to_bytes(sdev: sdp, blocks: sdkp->min_xfer_blocks); |
3358 | |
3359 | if (sdkp->opt_xfer_blocks == 0) |
3360 | return false; |
3361 | |
3362 | if (sdkp->opt_xfer_blocks > dev_max) { |
3363 | sd_first_printk(KERN_WARNING, sdkp, |
3364 | "Optimal transfer size %u logical blocks " \ |
3365 | "> dev_max (%u logical blocks)\n" , |
3366 | sdkp->opt_xfer_blocks, dev_max); |
3367 | return false; |
3368 | } |
3369 | |
3370 | if (sdkp->opt_xfer_blocks > SD_DEF_XFER_BLOCKS) { |
3371 | sd_first_printk(KERN_WARNING, sdkp, |
3372 | "Optimal transfer size %u logical blocks " \ |
3373 | "> sd driver limit (%u logical blocks)\n" , |
3374 | sdkp->opt_xfer_blocks, SD_DEF_XFER_BLOCKS); |
3375 | return false; |
3376 | } |
3377 | |
3378 | if (opt_xfer_bytes < PAGE_SIZE) { |
3379 | sd_first_printk(KERN_WARNING, sdkp, |
3380 | "Optimal transfer size %u bytes < " \ |
3381 | "PAGE_SIZE (%u bytes)\n" , |
3382 | opt_xfer_bytes, (unsigned int)PAGE_SIZE); |
3383 | return false; |
3384 | } |
3385 | |
3386 | if (min_xfer_bytes && opt_xfer_bytes % min_xfer_bytes) { |
3387 | sd_first_printk(KERN_WARNING, sdkp, |
3388 | "Optimal transfer size %u bytes not a " \ |
3389 | "multiple of preferred minimum block " \ |
3390 | "size (%u bytes)\n" , |
3391 | opt_xfer_bytes, min_xfer_bytes); |
3392 | return false; |
3393 | } |
3394 | |
3395 | if (opt_xfer_bytes & (sdkp->physical_block_size - 1)) { |
3396 | sd_first_printk(KERN_WARNING, sdkp, |
3397 | "Optimal transfer size %u bytes not a " \ |
3398 | "multiple of physical block size (%u bytes)\n" , |
3399 | opt_xfer_bytes, sdkp->physical_block_size); |
3400 | return false; |
3401 | } |
3402 | |
3403 | sd_first_printk(KERN_INFO, sdkp, "Optimal transfer size %u bytes\n" , |
3404 | opt_xfer_bytes); |
3405 | return true; |
3406 | } |
3407 | |
3408 | /** |
3409 | * sd_revalidate_disk - called the first time a new disk is seen, |
3410 | * performs disk spin up, read_capacity, etc. |
3411 | * @disk: struct gendisk we care about |
3412 | **/ |
3413 | static int sd_revalidate_disk(struct gendisk *disk) |
3414 | { |
3415 | struct scsi_disk *sdkp = scsi_disk(disk); |
3416 | struct scsi_device *sdp = sdkp->device; |
3417 | struct request_queue *q = sdkp->disk->queue; |
3418 | sector_t old_capacity = sdkp->capacity; |
3419 | unsigned char *buffer; |
3420 | unsigned int dev_max, rw_max; |
3421 | |
3422 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
3423 | "sd_revalidate_disk\n" )); |
3424 | |
3425 | /* |
3426 | * If the device is offline, don't try and read capacity or any |
3427 | * of the other niceties. |
3428 | */ |
3429 | if (!scsi_device_online(sdev: sdp)) |
3430 | goto out; |
3431 | |
3432 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
3433 | if (!buffer) { |
3434 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
3435 | "allocation failure.\n" ); |
3436 | goto out; |
3437 | } |
3438 | |
3439 | sd_spinup_disk(sdkp); |
3440 | |
3441 | /* |
3442 | * Without media there is no reason to ask; moreover, some devices |
3443 | * react badly if we do. |
3444 | */ |
3445 | if (sdkp->media_present) { |
3446 | sd_read_capacity(sdkp, buffer); |
3447 | |
3448 | /* |
3449 | * set the default to rotational. All non-rotational devices |
3450 | * support the block characteristics VPD page, which will |
3451 | * cause this to be updated correctly and any device which |
3452 | * doesn't support it should be treated as rotational. |
3453 | */ |
3454 | blk_queue_flag_clear(QUEUE_FLAG_NONROT, q); |
3455 | blk_queue_flag_set(QUEUE_FLAG_ADD_RANDOM, q); |
3456 | |
3457 | if (scsi_device_supports_vpd(sdev: sdp)) { |
3458 | sd_read_block_provisioning(sdkp); |
3459 | sd_read_block_limits(sdkp); |
3460 | sd_read_block_characteristics(sdkp); |
3461 | sd_zbc_read_zones(sdkp, buf: buffer); |
3462 | sd_read_cpr(sdkp); |
3463 | } |
3464 | |
3465 | sd_print_capacity(sdkp, old_capacity); |
3466 | |
3467 | sd_read_write_protect_flag(sdkp, buffer); |
3468 | sd_read_cache_type(sdkp, buffer); |
3469 | sd_read_app_tag_own(sdkp, buffer); |
3470 | sd_read_write_same(sdkp, buffer); |
3471 | sd_read_security(sdkp, buffer); |
3472 | sd_config_protection(sdkp); |
3473 | } |
3474 | |
3475 | /* |
3476 | * We now have all cache related info, determine how we deal |
3477 | * with flush requests. |
3478 | */ |
3479 | sd_set_flush_flag(sdkp); |
3480 | |
3481 | /* Initial block count limit based on CDB TRANSFER LENGTH field size. */ |
3482 | dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS; |
3483 | |
3484 | /* Some devices report a maximum block count for READ/WRITE requests. */ |
3485 | dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks); |
3486 | q->limits.max_dev_sectors = logical_to_sectors(sdev: sdp, blocks: dev_max); |
3487 | |
3488 | if (sd_validate_min_xfer_size(sdkp)) |
3489 | blk_queue_io_min(q: sdkp->disk->queue, |
3490 | min: logical_to_bytes(sdev: sdp, blocks: sdkp->min_xfer_blocks)); |
3491 | else |
3492 | blk_queue_io_min(q: sdkp->disk->queue, min: 0); |
3493 | |
3494 | if (sd_validate_opt_xfer_size(sdkp, dev_max)) { |
3495 | q->limits.io_opt = logical_to_bytes(sdev: sdp, blocks: sdkp->opt_xfer_blocks); |
3496 | rw_max = logical_to_sectors(sdev: sdp, blocks: sdkp->opt_xfer_blocks); |
3497 | } else { |
3498 | q->limits.io_opt = 0; |
3499 | rw_max = min_not_zero(logical_to_sectors(sdp, dev_max), |
3500 | (sector_t)BLK_DEF_MAX_SECTORS); |
3501 | } |
3502 | |
3503 | /* |
3504 | * Limit default to SCSI host optimal sector limit if set. There may be |
3505 | * an impact on performance for when the size of a request exceeds this |
3506 | * host limit. |
3507 | */ |
3508 | rw_max = min_not_zero(rw_max, sdp->host->opt_sectors); |
3509 | |
3510 | /* Do not exceed controller limit */ |
3511 | rw_max = min(rw_max, queue_max_hw_sectors(q)); |
3512 | |
3513 | /* |
3514 | * Only update max_sectors if previously unset or if the current value |
3515 | * exceeds the capabilities of the hardware. |
3516 | */ |
3517 | if (sdkp->first_scan || |
3518 | q->limits.max_sectors > q->limits.max_dev_sectors || |
3519 | q->limits.max_sectors > q->limits.max_hw_sectors) |
3520 | q->limits.max_sectors = rw_max; |
3521 | |
3522 | sdkp->first_scan = 0; |
3523 | |
3524 | set_capacity_and_notify(disk, size: logical_to_sectors(sdev: sdp, blocks: sdkp->capacity)); |
3525 | sd_config_write_same(sdkp); |
3526 | kfree(objp: buffer); |
3527 | |
3528 | /* |
3529 | * For a zoned drive, revalidating the zones can be done only once |
3530 | * the gendisk capacity is set. So if this fails, set back the gendisk |
3531 | * capacity to 0. |
3532 | */ |
3533 | if (sd_zbc_revalidate_zones(sdkp)) |
3534 | set_capacity_and_notify(disk, size: 0); |
3535 | |
3536 | out: |
3537 | return 0; |
3538 | } |
3539 | |
3540 | /** |
3541 | * sd_unlock_native_capacity - unlock native capacity |
3542 | * @disk: struct gendisk to set capacity for |
3543 | * |
3544 | * Block layer calls this function if it detects that partitions |
3545 | * on @disk reach beyond the end of the device. If the SCSI host |
3546 | * implements ->unlock_native_capacity() method, it's invoked to |
3547 | * give it a chance to adjust the device capacity. |
3548 | * |
3549 | * CONTEXT: |
3550 | * Defined by block layer. Might sleep. |
3551 | */ |
3552 | static void sd_unlock_native_capacity(struct gendisk *disk) |
3553 | { |
3554 | struct scsi_device *sdev = scsi_disk(disk)->device; |
3555 | |
3556 | if (sdev->host->hostt->unlock_native_capacity) |
3557 | sdev->host->hostt->unlock_native_capacity(sdev); |
3558 | } |
3559 | |
3560 | /** |
3561 | * sd_format_disk_name - format disk name |
3562 | * @prefix: name prefix - ie. "sd" for SCSI disks |
3563 | * @index: index of the disk to format name for |
3564 | * @buf: output buffer |
3565 | * @buflen: length of the output buffer |
3566 | * |
3567 | * SCSI disk names starts at sda. The 26th device is sdz and the |
3568 | * 27th is sdaa. The last one for two lettered suffix is sdzz |
3569 | * which is followed by sdaaa. |
3570 | * |
3571 | * This is basically 26 base counting with one extra 'nil' entry |
3572 | * at the beginning from the second digit on and can be |
3573 | * determined using similar method as 26 base conversion with the |
3574 | * index shifted -1 after each digit is computed. |
3575 | * |
3576 | * CONTEXT: |
3577 | * Don't care. |
3578 | * |
3579 | * RETURNS: |
3580 | * 0 on success, -errno on failure. |
3581 | */ |
3582 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) |
3583 | { |
3584 | const int base = 'z' - 'a' + 1; |
3585 | char *begin = buf + strlen(prefix); |
3586 | char *end = buf + buflen; |
3587 | char *p; |
3588 | int unit; |
3589 | |
3590 | p = end - 1; |
3591 | *p = '\0'; |
3592 | unit = base; |
3593 | do { |
3594 | if (p == begin) |
3595 | return -EINVAL; |
3596 | *--p = 'a' + (index % unit); |
3597 | index = (index / unit) - 1; |
3598 | } while (index >= 0); |
3599 | |
3600 | memmove(begin, p, end - p); |
3601 | memcpy(buf, prefix, strlen(prefix)); |
3602 | |
3603 | return 0; |
3604 | } |
3605 | |
3606 | /** |
3607 | * sd_probe - called during driver initialization and whenever a |
3608 | * new scsi device is attached to the system. It is called once |
3609 | * for each scsi device (not just disks) present. |
3610 | * @dev: pointer to device object |
3611 | * |
3612 | * Returns 0 if successful (or not interested in this scsi device |
3613 | * (e.g. scanner)); 1 when there is an error. |
3614 | * |
3615 | * Note: this function is invoked from the scsi mid-level. |
3616 | * This function sets up the mapping between a given |
3617 | * <host,channel,id,lun> (found in sdp) and new device name |
3618 | * (e.g. /dev/sda). More precisely it is the block device major |
3619 | * and minor number that is chosen here. |
3620 | * |
3621 | * Assume sd_probe is not re-entrant (for time being) |
3622 | * Also think about sd_probe() and sd_remove() running coincidentally. |
3623 | **/ |
3624 | static int sd_probe(struct device *dev) |
3625 | { |
3626 | struct scsi_device *sdp = to_scsi_device(dev); |
3627 | struct scsi_disk *sdkp; |
3628 | struct gendisk *gd; |
3629 | int index; |
3630 | int error; |
3631 | |
3632 | scsi_autopm_get_device(sdp); |
3633 | error = -ENODEV; |
3634 | if (sdp->type != TYPE_DISK && |
3635 | sdp->type != TYPE_ZBC && |
3636 | sdp->type != TYPE_MOD && |
3637 | sdp->type != TYPE_RBC) |
3638 | goto out; |
3639 | |
3640 | if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED) && sdp->type == TYPE_ZBC) { |
3641 | sdev_printk(KERN_WARNING, sdp, |
3642 | "Unsupported ZBC host-managed device.\n" ); |
3643 | goto out; |
3644 | } |
3645 | |
3646 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
3647 | "sd_probe\n" )); |
3648 | |
3649 | error = -ENOMEM; |
3650 | sdkp = kzalloc(size: sizeof(*sdkp), GFP_KERNEL); |
3651 | if (!sdkp) |
3652 | goto out; |
3653 | |
3654 | gd = blk_mq_alloc_disk_for_queue(q: sdp->request_queue, |
3655 | lkclass: &sd_bio_compl_lkclass); |
3656 | if (!gd) |
3657 | goto out_free; |
3658 | |
3659 | index = ida_alloc(ida: &sd_index_ida, GFP_KERNEL); |
3660 | if (index < 0) { |
3661 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n" ); |
3662 | goto out_put; |
3663 | } |
3664 | |
3665 | error = sd_format_disk_name(prefix: "sd" , index, buf: gd->disk_name, DISK_NAME_LEN); |
3666 | if (error) { |
3667 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n" ); |
3668 | goto out_free_index; |
3669 | } |
3670 | |
3671 | sdkp->device = sdp; |
3672 | sdkp->disk = gd; |
3673 | sdkp->index = index; |
3674 | sdkp->max_retries = SD_MAX_RETRIES; |
3675 | atomic_set(v: &sdkp->openers, i: 0); |
3676 | atomic_set(v: &sdkp->device->ioerr_cnt, i: 0); |
3677 | |
3678 | if (!sdp->request_queue->rq_timeout) { |
3679 | if (sdp->type != TYPE_MOD) |
3680 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); |
3681 | else |
3682 | blk_queue_rq_timeout(sdp->request_queue, |
3683 | SD_MOD_TIMEOUT); |
3684 | } |
3685 | |
3686 | device_initialize(dev: &sdkp->disk_dev); |
3687 | sdkp->disk_dev.parent = get_device(dev); |
3688 | sdkp->disk_dev.class = &sd_disk_class; |
3689 | dev_set_name(dev: &sdkp->disk_dev, name: "%s" , dev_name(dev)); |
3690 | |
3691 | error = device_add(dev: &sdkp->disk_dev); |
3692 | if (error) { |
3693 | put_device(dev: &sdkp->disk_dev); |
3694 | goto out; |
3695 | } |
3696 | |
3697 | dev_set_drvdata(dev, data: sdkp); |
3698 | |
3699 | gd->major = sd_major(major_idx: (index & 0xf0) >> 4); |
3700 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); |
3701 | gd->minors = SD_MINORS; |
3702 | |
3703 | gd->fops = &sd_fops; |
3704 | gd->private_data = sdkp; |
3705 | |
3706 | /* defaults, until the device tells us otherwise */ |
3707 | sdp->sector_size = 512; |
3708 | sdkp->capacity = 0; |
3709 | sdkp->media_present = 1; |
3710 | sdkp->write_prot = 0; |
3711 | sdkp->cache_override = 0; |
3712 | sdkp->WCE = 0; |
3713 | sdkp->RCD = 0; |
3714 | sdkp->ATO = 0; |
3715 | sdkp->first_scan = 1; |
3716 | sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS; |
3717 | |
3718 | sd_revalidate_disk(disk: gd); |
3719 | |
3720 | if (sdp->removable) { |
3721 | gd->flags |= GENHD_FL_REMOVABLE; |
3722 | gd->events |= DISK_EVENT_MEDIA_CHANGE; |
3723 | gd->event_flags = DISK_EVENT_FLAG_POLL | DISK_EVENT_FLAG_UEVENT; |
3724 | } |
3725 | |
3726 | blk_pm_runtime_init(q: sdp->request_queue, dev); |
3727 | if (sdp->rpm_autosuspend) { |
3728 | pm_runtime_set_autosuspend_delay(dev, |
3729 | delay: sdp->host->hostt->rpm_autosuspend_delay); |
3730 | } |
3731 | |
3732 | error = device_add_disk(parent: dev, disk: gd, NULL); |
3733 | if (error) { |
3734 | put_device(dev: &sdkp->disk_dev); |
3735 | put_disk(disk: gd); |
3736 | goto out; |
3737 | } |
3738 | |
3739 | if (sdkp->security) { |
3740 | sdkp->opal_dev = init_opal_dev(data: sdkp, send_recv: &sd_sec_submit); |
3741 | if (sdkp->opal_dev) |
3742 | sd_printk(KERN_NOTICE, sdkp, "supports TCG Opal\n" ); |
3743 | } |
3744 | |
3745 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n" , |
3746 | sdp->removable ? "removable " : "" ); |
3747 | scsi_autopm_put_device(sdp); |
3748 | |
3749 | return 0; |
3750 | |
3751 | out_free_index: |
3752 | ida_free(&sd_index_ida, id: index); |
3753 | out_put: |
3754 | put_disk(disk: gd); |
3755 | out_free: |
3756 | kfree(objp: sdkp); |
3757 | out: |
3758 | scsi_autopm_put_device(sdp); |
3759 | return error; |
3760 | } |
3761 | |
3762 | /** |
3763 | * sd_remove - called whenever a scsi disk (previously recognized by |
3764 | * sd_probe) is detached from the system. It is called (potentially |
3765 | * multiple times) during sd module unload. |
3766 | * @dev: pointer to device object |
3767 | * |
3768 | * Note: this function is invoked from the scsi mid-level. |
3769 | * This function potentially frees up a device name (e.g. /dev/sdc) |
3770 | * that could be re-used by a subsequent sd_probe(). |
3771 | * This function is not called when the built-in sd driver is "exit-ed". |
3772 | **/ |
3773 | static int sd_remove(struct device *dev) |
3774 | { |
3775 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
3776 | |
3777 | scsi_autopm_get_device(sdkp->device); |
3778 | |
3779 | device_del(dev: &sdkp->disk_dev); |
3780 | del_gendisk(gp: sdkp->disk); |
3781 | if (!sdkp->suspended) |
3782 | sd_shutdown(dev); |
3783 | |
3784 | put_disk(disk: sdkp->disk); |
3785 | return 0; |
3786 | } |
3787 | |
3788 | static void scsi_disk_release(struct device *dev) |
3789 | { |
3790 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
3791 | |
3792 | ida_free(&sd_index_ida, id: sdkp->index); |
3793 | sd_zbc_free_zone_info(sdkp); |
3794 | put_device(dev: &sdkp->device->sdev_gendev); |
3795 | free_opal_dev(dev: sdkp->opal_dev); |
3796 | |
3797 | kfree(objp: sdkp); |
3798 | } |
3799 | |
3800 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
3801 | { |
3802 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ |
3803 | struct scsi_sense_hdr sshdr; |
3804 | const struct scsi_exec_args exec_args = { |
3805 | .sshdr = &sshdr, |
3806 | .req_flags = BLK_MQ_REQ_PM, |
3807 | }; |
3808 | struct scsi_device *sdp = sdkp->device; |
3809 | int res; |
3810 | |
3811 | if (start) |
3812 | cmd[4] |= 1; /* START */ |
3813 | |
3814 | if (sdp->start_stop_pwr_cond) |
3815 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ |
3816 | |
3817 | if (!scsi_device_online(sdev: sdp)) |
3818 | return -ENODEV; |
3819 | |
3820 | res = scsi_execute_cmd(sdev: sdp, cmd, opf: REQ_OP_DRV_IN, NULL, bufflen: 0, SD_TIMEOUT, |
3821 | retries: sdkp->max_retries, args: &exec_args); |
3822 | if (res) { |
3823 | sd_print_result(sdkp, msg: "Start/Stop Unit failed" , result: res); |
3824 | if (res > 0 && scsi_sense_valid(sshdr: &sshdr)) { |
3825 | sd_print_sense_hdr(sdkp, sshdr: &sshdr); |
3826 | /* 0x3a is medium not present */ |
3827 | if (sshdr.asc == 0x3a) |
3828 | res = 0; |
3829 | } |
3830 | } |
3831 | |
3832 | /* SCSI error codes must not go to the generic layer */ |
3833 | if (res) |
3834 | return -EIO; |
3835 | |
3836 | return 0; |
3837 | } |
3838 | |
3839 | /* |
3840 | * Send a SYNCHRONIZE CACHE instruction down to the device through |
3841 | * the normal SCSI command structure. Wait for the command to |
3842 | * complete. |
3843 | */ |
3844 | static void sd_shutdown(struct device *dev) |
3845 | { |
3846 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
3847 | |
3848 | if (!sdkp) |
3849 | return; /* this can happen */ |
3850 | |
3851 | if (pm_runtime_suspended(dev)) |
3852 | return; |
3853 | |
3854 | if (sdkp->WCE && sdkp->media_present) { |
3855 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n" ); |
3856 | sd_sync_cache(sdkp, NULL); |
3857 | } |
3858 | |
3859 | if ((system_state != SYSTEM_RESTART && |
3860 | sdkp->device->manage_system_start_stop) || |
3861 | (system_state == SYSTEM_POWER_OFF && |
3862 | sdkp->device->manage_shutdown)) { |
3863 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n" ); |
3864 | sd_start_stop_device(sdkp, start: 0); |
3865 | } |
3866 | } |
3867 | |
3868 | static inline bool sd_do_start_stop(struct scsi_device *sdev, bool runtime) |
3869 | { |
3870 | return (sdev->manage_system_start_stop && !runtime) || |
3871 | (sdev->manage_runtime_start_stop && runtime); |
3872 | } |
3873 | |
3874 | static int sd_suspend_common(struct device *dev, bool runtime) |
3875 | { |
3876 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
3877 | struct scsi_sense_hdr sshdr; |
3878 | int ret = 0; |
3879 | |
3880 | if (!sdkp) /* E.g.: runtime suspend following sd_remove() */ |
3881 | return 0; |
3882 | |
3883 | if (sdkp->WCE && sdkp->media_present) { |
3884 | if (!sdkp->device->silence_suspend) |
3885 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n" ); |
3886 | ret = sd_sync_cache(sdkp, sshdr: &sshdr); |
3887 | |
3888 | if (ret) { |
3889 | /* ignore OFFLINE device */ |
3890 | if (ret == -ENODEV) |
3891 | return 0; |
3892 | |
3893 | if (!scsi_sense_valid(sshdr: &sshdr) || |
3894 | sshdr.sense_key != ILLEGAL_REQUEST) |
3895 | return ret; |
3896 | |
3897 | /* |
3898 | * sshdr.sense_key == ILLEGAL_REQUEST means this drive |
3899 | * doesn't support sync. There's not much to do and |
3900 | * suspend shouldn't fail. |
3901 | */ |
3902 | ret = 0; |
3903 | } |
3904 | } |
3905 | |
3906 | if (sd_do_start_stop(sdev: sdkp->device, runtime)) { |
3907 | if (!sdkp->device->silence_suspend) |
3908 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n" ); |
3909 | /* an error is not worth aborting a system sleep */ |
3910 | ret = sd_start_stop_device(sdkp, start: 0); |
3911 | if (!runtime) |
3912 | ret = 0; |
3913 | } |
3914 | |
3915 | if (!ret) |
3916 | sdkp->suspended = true; |
3917 | |
3918 | return ret; |
3919 | } |
3920 | |
3921 | static int sd_suspend_system(struct device *dev) |
3922 | { |
3923 | if (pm_runtime_suspended(dev)) |
3924 | return 0; |
3925 | |
3926 | return sd_suspend_common(dev, runtime: false); |
3927 | } |
3928 | |
3929 | static int sd_suspend_runtime(struct device *dev) |
3930 | { |
3931 | return sd_suspend_common(dev, runtime: true); |
3932 | } |
3933 | |
3934 | static int sd_resume(struct device *dev, bool runtime) |
3935 | { |
3936 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
3937 | int ret; |
3938 | |
3939 | if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ |
3940 | return 0; |
3941 | |
3942 | if (!sd_do_start_stop(sdev: sdkp->device, runtime)) { |
3943 | sdkp->suspended = false; |
3944 | return 0; |
3945 | } |
3946 | |
3947 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n" ); |
3948 | ret = sd_start_stop_device(sdkp, start: 1); |
3949 | if (!ret) { |
3950 | opal_unlock_from_suspend(dev: sdkp->opal_dev); |
3951 | sdkp->suspended = false; |
3952 | } |
3953 | |
3954 | return ret; |
3955 | } |
3956 | |
3957 | static int sd_resume_system(struct device *dev) |
3958 | { |
3959 | if (pm_runtime_suspended(dev)) |
3960 | return 0; |
3961 | |
3962 | return sd_resume(dev, runtime: false); |
3963 | } |
3964 | |
3965 | static int sd_resume_runtime(struct device *dev) |
3966 | { |
3967 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
3968 | struct scsi_device *sdp; |
3969 | |
3970 | if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ |
3971 | return 0; |
3972 | |
3973 | sdp = sdkp->device; |
3974 | |
3975 | if (sdp->ignore_media_change) { |
3976 | /* clear the device's sense data */ |
3977 | static const u8 cmd[10] = { REQUEST_SENSE }; |
3978 | const struct scsi_exec_args exec_args = { |
3979 | .req_flags = BLK_MQ_REQ_PM, |
3980 | }; |
3981 | |
3982 | if (scsi_execute_cmd(sdev: sdp, cmd, opf: REQ_OP_DRV_IN, NULL, bufflen: 0, |
3983 | timeout: sdp->request_queue->rq_timeout, retries: 1, |
3984 | args: &exec_args)) |
3985 | sd_printk(KERN_NOTICE, sdkp, |
3986 | "Failed to clear sense data\n" ); |
3987 | } |
3988 | |
3989 | return sd_resume(dev, runtime: true); |
3990 | } |
3991 | |
3992 | static const struct dev_pm_ops sd_pm_ops = { |
3993 | .suspend = sd_suspend_system, |
3994 | .resume = sd_resume_system, |
3995 | .poweroff = sd_suspend_system, |
3996 | .restore = sd_resume_system, |
3997 | .runtime_suspend = sd_suspend_runtime, |
3998 | .runtime_resume = sd_resume_runtime, |
3999 | }; |
4000 | |
4001 | static struct scsi_driver sd_template = { |
4002 | .gendrv = { |
4003 | .name = "sd" , |
4004 | .owner = THIS_MODULE, |
4005 | .probe = sd_probe, |
4006 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
4007 | .remove = sd_remove, |
4008 | .shutdown = sd_shutdown, |
4009 | .pm = &sd_pm_ops, |
4010 | }, |
4011 | .rescan = sd_rescan, |
4012 | .init_command = sd_init_command, |
4013 | .uninit_command = sd_uninit_command, |
4014 | .done = sd_done, |
4015 | .eh_action = sd_eh_action, |
4016 | .eh_reset = sd_eh_reset, |
4017 | }; |
4018 | |
4019 | /** |
4020 | * init_sd - entry point for this driver (both when built in or when |
4021 | * a module). |
4022 | * |
4023 | * Note: this function registers this driver with the scsi mid-level. |
4024 | **/ |
4025 | static int __init init_sd(void) |
4026 | { |
4027 | int majors = 0, i, err; |
4028 | |
4029 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n" )); |
4030 | |
4031 | for (i = 0; i < SD_MAJORS; i++) { |
4032 | if (__register_blkdev(major: sd_major(major_idx: i), name: "sd" , probe: sd_default_probe)) |
4033 | continue; |
4034 | majors++; |
4035 | } |
4036 | |
4037 | if (!majors) |
4038 | return -ENODEV; |
4039 | |
4040 | err = class_register(class: &sd_disk_class); |
4041 | if (err) |
4042 | goto err_out; |
4043 | |
4044 | sd_page_pool = mempool_create_page_pool(min_nr: SD_MEMPOOL_SIZE, order: 0); |
4045 | if (!sd_page_pool) { |
4046 | printk(KERN_ERR "sd: can't init discard page pool\n" ); |
4047 | err = -ENOMEM; |
4048 | goto err_out_class; |
4049 | } |
4050 | |
4051 | err = scsi_register_driver(&sd_template.gendrv); |
4052 | if (err) |
4053 | goto err_out_driver; |
4054 | |
4055 | return 0; |
4056 | |
4057 | err_out_driver: |
4058 | mempool_destroy(pool: sd_page_pool); |
4059 | err_out_class: |
4060 | class_unregister(class: &sd_disk_class); |
4061 | err_out: |
4062 | for (i = 0; i < SD_MAJORS; i++) |
4063 | unregister_blkdev(major: sd_major(major_idx: i), name: "sd" ); |
4064 | return err; |
4065 | } |
4066 | |
4067 | /** |
4068 | * exit_sd - exit point for this driver (when it is a module). |
4069 | * |
4070 | * Note: this function unregisters this driver from the scsi mid-level. |
4071 | **/ |
4072 | static void __exit exit_sd(void) |
4073 | { |
4074 | int i; |
4075 | |
4076 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n" )); |
4077 | |
4078 | scsi_unregister_driver(&sd_template.gendrv); |
4079 | mempool_destroy(pool: sd_page_pool); |
4080 | |
4081 | class_unregister(class: &sd_disk_class); |
4082 | |
4083 | for (i = 0; i < SD_MAJORS; i++) |
4084 | unregister_blkdev(major: sd_major(major_idx: i), name: "sd" ); |
4085 | } |
4086 | |
4087 | module_init(init_sd); |
4088 | module_exit(exit_sd); |
4089 | |
4090 | void sd_print_sense_hdr(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr) |
4091 | { |
4092 | scsi_print_sense_hdr(sdkp->device, |
4093 | sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr); |
4094 | } |
4095 | |
4096 | void sd_print_result(const struct scsi_disk *sdkp, const char *msg, int result) |
4097 | { |
4098 | const char *hb_string = scsi_hostbyte_string(result); |
4099 | |
4100 | if (hb_string) |
4101 | sd_printk(KERN_INFO, sdkp, |
4102 | "%s: Result: hostbyte=%s driverbyte=%s\n" , msg, |
4103 | hb_string ? hb_string : "invalid" , |
4104 | "DRIVER_OK" ); |
4105 | else |
4106 | sd_printk(KERN_INFO, sdkp, |
4107 | "%s: Result: hostbyte=0x%02x driverbyte=%s\n" , |
4108 | msg, host_byte(result), "DRIVER_OK" ); |
4109 | } |
4110 | |