FreeBSD/Linux Kernel Cross Reference
sys/cam/cam_periph.c
1 /*-
2 * Common functions for CAM "type" (peripheral) drivers.
3 *
4 * Copyright (c) 1997, 1998 Justin T. Gibbs.
5 * Copyright (c) 1997, 1998, 1999, 2000 Kenneth D. Merry.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions, and the following disclaimer,
13 * without modification, immediately at the beginning of the file.
14 * 2. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD: releng/11.1/sys/cam/cam_periph.c 320608 2017-07-03 18:20:45Z ken $");
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/types.h>
36 #include <sys/malloc.h>
37 #include <sys/kernel.h>
38 #include <sys/bio.h>
39 #include <sys/lock.h>
40 #include <sys/mutex.h>
41 #include <sys/buf.h>
42 #include <sys/proc.h>
43 #include <sys/devicestat.h>
44 #include <sys/bus.h>
45 #include <sys/sbuf.h>
46 #include <vm/vm.h>
47 #include <vm/vm_extern.h>
48
49 #include <cam/cam.h>
50 #include <cam/cam_ccb.h>
51 #include <cam/cam_queue.h>
52 #include <cam/cam_xpt_periph.h>
53 #include <cam/cam_periph.h>
54 #include <cam/cam_debug.h>
55 #include <cam/cam_sim.h>
56
57 #include <cam/scsi/scsi_all.h>
58 #include <cam/scsi/scsi_message.h>
59 #include <cam/scsi/scsi_pass.h>
60
61 static u_int camperiphnextunit(struct periph_driver *p_drv,
62 u_int newunit, int wired,
63 path_id_t pathid, target_id_t target,
64 lun_id_t lun);
65 static u_int camperiphunit(struct periph_driver *p_drv,
66 path_id_t pathid, target_id_t target,
67 lun_id_t lun);
68 static void camperiphdone(struct cam_periph *periph,
69 union ccb *done_ccb);
70 static void camperiphfree(struct cam_periph *periph);
71 static int camperiphscsistatuserror(union ccb *ccb,
72 union ccb **orig_ccb,
73 cam_flags camflags,
74 u_int32_t sense_flags,
75 int *openings,
76 u_int32_t *relsim_flags,
77 u_int32_t *timeout,
78 u_int32_t *action,
79 const char **action_string);
80 static int camperiphscsisenseerror(union ccb *ccb,
81 union ccb **orig_ccb,
82 cam_flags camflags,
83 u_int32_t sense_flags,
84 int *openings,
85 u_int32_t *relsim_flags,
86 u_int32_t *timeout,
87 u_int32_t *action,
88 const char **action_string);
89 static void cam_periph_devctl_notify(union ccb *ccb);
90
91 static int nperiph_drivers;
92 static int initialized = 0;
93 struct periph_driver **periph_drivers;
94
95 static MALLOC_DEFINE(M_CAMPERIPH, "CAM periph", "CAM peripheral buffers");
96
97 static int periph_selto_delay = 1000;
98 TUNABLE_INT("kern.cam.periph_selto_delay", &periph_selto_delay);
99 static int periph_noresrc_delay = 500;
100 TUNABLE_INT("kern.cam.periph_noresrc_delay", &periph_noresrc_delay);
101 static int periph_busy_delay = 500;
102 TUNABLE_INT("kern.cam.periph_busy_delay", &periph_busy_delay);
103
104
105 void
106 periphdriver_register(void *data)
107 {
108 struct periph_driver *drv = (struct periph_driver *)data;
109 struct periph_driver **newdrivers, **old;
110 int ndrivers;
111
112 again:
113 ndrivers = nperiph_drivers + 2;
114 newdrivers = malloc(sizeof(*newdrivers) * ndrivers, M_CAMPERIPH,
115 M_WAITOK);
116 xpt_lock_buses();
117 if (ndrivers != nperiph_drivers + 2) {
118 /*
119 * Lost race against itself; go around.
120 */
121 xpt_unlock_buses();
122 free(newdrivers, M_CAMPERIPH);
123 goto again;
124 }
125 if (periph_drivers)
126 bcopy(periph_drivers, newdrivers,
127 sizeof(*newdrivers) * nperiph_drivers);
128 newdrivers[nperiph_drivers] = drv;
129 newdrivers[nperiph_drivers + 1] = NULL;
130 old = periph_drivers;
131 periph_drivers = newdrivers;
132 nperiph_drivers++;
133 xpt_unlock_buses();
134 if (old)
135 free(old, M_CAMPERIPH);
136 /* If driver marked as early or it is late now, initialize it. */
137 if (((drv->flags & CAM_PERIPH_DRV_EARLY) != 0 && initialized > 0) ||
138 initialized > 1)
139 (*drv->init)();
140 }
141
142 int
143 periphdriver_unregister(void *data)
144 {
145 struct periph_driver *drv = (struct periph_driver *)data;
146 int error, n;
147
148 /* If driver marked as early or it is late now, deinitialize it. */
149 if (((drv->flags & CAM_PERIPH_DRV_EARLY) != 0 && initialized > 0) ||
150 initialized > 1) {
151 if (drv->deinit == NULL) {
152 printf("CAM periph driver '%s' doesn't have deinit.\n",
153 drv->driver_name);
154 return (EOPNOTSUPP);
155 }
156 error = drv->deinit();
157 if (error != 0)
158 return (error);
159 }
160
161 xpt_lock_buses();
162 for (n = 0; n < nperiph_drivers && periph_drivers[n] != drv; n++)
163 ;
164 KASSERT(n < nperiph_drivers,
165 ("Periph driver '%s' was not registered", drv->driver_name));
166 for (; n + 1 < nperiph_drivers; n++)
167 periph_drivers[n] = periph_drivers[n + 1];
168 periph_drivers[n + 1] = NULL;
169 nperiph_drivers--;
170 xpt_unlock_buses();
171 return (0);
172 }
173
174 void
175 periphdriver_init(int level)
176 {
177 int i, early;
178
179 initialized = max(initialized, level);
180 for (i = 0; periph_drivers[i] != NULL; i++) {
181 early = (periph_drivers[i]->flags & CAM_PERIPH_DRV_EARLY) ? 1 : 2;
182 if (early == initialized)
183 (*periph_drivers[i]->init)();
184 }
185 }
186
187 cam_status
188 cam_periph_alloc(periph_ctor_t *periph_ctor,
189 periph_oninv_t *periph_oninvalidate,
190 periph_dtor_t *periph_dtor, periph_start_t *periph_start,
191 char *name, cam_periph_type type, struct cam_path *path,
192 ac_callback_t *ac_callback, ac_code code, void *arg)
193 {
194 struct periph_driver **p_drv;
195 struct cam_sim *sim;
196 struct cam_periph *periph;
197 struct cam_periph *cur_periph;
198 path_id_t path_id;
199 target_id_t target_id;
200 lun_id_t lun_id;
201 cam_status status;
202 u_int init_level;
203
204 init_level = 0;
205 /*
206 * Handle Hot-Plug scenarios. If there is already a peripheral
207 * of our type assigned to this path, we are likely waiting for
208 * final close on an old, invalidated, peripheral. If this is
209 * the case, queue up a deferred call to the peripheral's async
210 * handler. If it looks like a mistaken re-allocation, complain.
211 */
212 if ((periph = cam_periph_find(path, name)) != NULL) {
213
214 if ((periph->flags & CAM_PERIPH_INVALID) != 0
215 && (periph->flags & CAM_PERIPH_NEW_DEV_FOUND) == 0) {
216 periph->flags |= CAM_PERIPH_NEW_DEV_FOUND;
217 periph->deferred_callback = ac_callback;
218 periph->deferred_ac = code;
219 return (CAM_REQ_INPROG);
220 } else {
221 printf("cam_periph_alloc: attempt to re-allocate "
222 "valid device %s%d rejected flags %#x "
223 "refcount %d\n", periph->periph_name,
224 periph->unit_number, periph->flags,
225 periph->refcount);
226 }
227 return (CAM_REQ_INVALID);
228 }
229
230 periph = (struct cam_periph *)malloc(sizeof(*periph), M_CAMPERIPH,
231 M_NOWAIT|M_ZERO);
232
233 if (periph == NULL)
234 return (CAM_RESRC_UNAVAIL);
235
236 init_level++;
237
238
239 sim = xpt_path_sim(path);
240 path_id = xpt_path_path_id(path);
241 target_id = xpt_path_target_id(path);
242 lun_id = xpt_path_lun_id(path);
243 periph->periph_start = periph_start;
244 periph->periph_dtor = periph_dtor;
245 periph->periph_oninval = periph_oninvalidate;
246 periph->type = type;
247 periph->periph_name = name;
248 periph->scheduled_priority = CAM_PRIORITY_NONE;
249 periph->immediate_priority = CAM_PRIORITY_NONE;
250 periph->refcount = 1; /* Dropped by invalidation. */
251 periph->sim = sim;
252 SLIST_INIT(&periph->ccb_list);
253 status = xpt_create_path(&path, periph, path_id, target_id, lun_id);
254 if (status != CAM_REQ_CMP)
255 goto failure;
256 periph->path = path;
257
258 xpt_lock_buses();
259 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) {
260 if (strcmp((*p_drv)->driver_name, name) == 0)
261 break;
262 }
263 if (*p_drv == NULL) {
264 printf("cam_periph_alloc: invalid periph name '%s'\n", name);
265 xpt_unlock_buses();
266 xpt_free_path(periph->path);
267 free(periph, M_CAMPERIPH);
268 return (CAM_REQ_INVALID);
269 }
270 periph->unit_number = camperiphunit(*p_drv, path_id, target_id, lun_id);
271 cur_periph = TAILQ_FIRST(&(*p_drv)->units);
272 while (cur_periph != NULL
273 && cur_periph->unit_number < periph->unit_number)
274 cur_periph = TAILQ_NEXT(cur_periph, unit_links);
275 if (cur_periph != NULL) {
276 KASSERT(cur_periph->unit_number != periph->unit_number, ("duplicate units on periph list"));
277 TAILQ_INSERT_BEFORE(cur_periph, periph, unit_links);
278 } else {
279 TAILQ_INSERT_TAIL(&(*p_drv)->units, periph, unit_links);
280 (*p_drv)->generation++;
281 }
282 xpt_unlock_buses();
283
284 init_level++;
285
286 status = xpt_add_periph(periph);
287 if (status != CAM_REQ_CMP)
288 goto failure;
289
290 init_level++;
291 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("Periph created\n"));
292
293 status = periph_ctor(periph, arg);
294
295 if (status == CAM_REQ_CMP)
296 init_level++;
297
298 failure:
299 switch (init_level) {
300 case 4:
301 /* Initialized successfully */
302 break;
303 case 3:
304 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("Periph destroyed\n"));
305 xpt_remove_periph(periph);
306 /* FALLTHROUGH */
307 case 2:
308 xpt_lock_buses();
309 TAILQ_REMOVE(&(*p_drv)->units, periph, unit_links);
310 xpt_unlock_buses();
311 xpt_free_path(periph->path);
312 /* FALLTHROUGH */
313 case 1:
314 free(periph, M_CAMPERIPH);
315 /* FALLTHROUGH */
316 case 0:
317 /* No cleanup to perform. */
318 break;
319 default:
320 panic("%s: Unknown init level", __func__);
321 }
322 return(status);
323 }
324
325 /*
326 * Find a peripheral structure with the specified path, target, lun,
327 * and (optionally) type. If the name is NULL, this function will return
328 * the first peripheral driver that matches the specified path.
329 */
330 struct cam_periph *
331 cam_periph_find(struct cam_path *path, char *name)
332 {
333 struct periph_driver **p_drv;
334 struct cam_periph *periph;
335
336 xpt_lock_buses();
337 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) {
338
339 if (name != NULL && (strcmp((*p_drv)->driver_name, name) != 0))
340 continue;
341
342 TAILQ_FOREACH(periph, &(*p_drv)->units, unit_links) {
343 if (xpt_path_comp(periph->path, path) == 0) {
344 xpt_unlock_buses();
345 cam_periph_assert(periph, MA_OWNED);
346 return(periph);
347 }
348 }
349 if (name != NULL) {
350 xpt_unlock_buses();
351 return(NULL);
352 }
353 }
354 xpt_unlock_buses();
355 return(NULL);
356 }
357
358 /*
359 * Find peripheral driver instances attached to the specified path.
360 */
361 int
362 cam_periph_list(struct cam_path *path, struct sbuf *sb)
363 {
364 struct sbuf local_sb;
365 struct periph_driver **p_drv;
366 struct cam_periph *periph;
367 int count;
368 int sbuf_alloc_len;
369
370 sbuf_alloc_len = 16;
371 retry:
372 sbuf_new(&local_sb, NULL, sbuf_alloc_len, SBUF_FIXEDLEN);
373 count = 0;
374 xpt_lock_buses();
375 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) {
376
377 TAILQ_FOREACH(periph, &(*p_drv)->units, unit_links) {
378 if (xpt_path_comp(periph->path, path) != 0)
379 continue;
380
381 if (sbuf_len(&local_sb) != 0)
382 sbuf_cat(&local_sb, ",");
383
384 sbuf_printf(&local_sb, "%s%d", periph->periph_name,
385 periph->unit_number);
386
387 if (sbuf_error(&local_sb) == ENOMEM) {
388 sbuf_alloc_len *= 2;
389 xpt_unlock_buses();
390 sbuf_delete(&local_sb);
391 goto retry;
392 }
393 count++;
394 }
395 }
396 xpt_unlock_buses();
397 sbuf_finish(&local_sb);
398 sbuf_cpy(sb, sbuf_data(&local_sb));
399 sbuf_delete(&local_sb);
400 return (count);
401 }
402
403 cam_status
404 cam_periph_acquire(struct cam_periph *periph)
405 {
406 cam_status status;
407
408 status = CAM_REQ_CMP_ERR;
409 if (periph == NULL)
410 return (status);
411
412 xpt_lock_buses();
413 if ((periph->flags & CAM_PERIPH_INVALID) == 0) {
414 periph->refcount++;
415 status = CAM_REQ_CMP;
416 }
417 xpt_unlock_buses();
418
419 return (status);
420 }
421
422 void
423 cam_periph_doacquire(struct cam_periph *periph)
424 {
425
426 xpt_lock_buses();
427 KASSERT(periph->refcount >= 1,
428 ("cam_periph_doacquire() with refcount == %d", periph->refcount));
429 periph->refcount++;
430 xpt_unlock_buses();
431 }
432
433 void
434 cam_periph_release_locked_buses(struct cam_periph *periph)
435 {
436
437 cam_periph_assert(periph, MA_OWNED);
438 KASSERT(periph->refcount >= 1, ("periph->refcount >= 1"));
439 if (--periph->refcount == 0)
440 camperiphfree(periph);
441 }
442
443 void
444 cam_periph_release_locked(struct cam_periph *periph)
445 {
446
447 if (periph == NULL)
448 return;
449
450 xpt_lock_buses();
451 cam_periph_release_locked_buses(periph);
452 xpt_unlock_buses();
453 }
454
455 void
456 cam_periph_release(struct cam_periph *periph)
457 {
458 struct mtx *mtx;
459
460 if (periph == NULL)
461 return;
462
463 cam_periph_assert(periph, MA_NOTOWNED);
464 mtx = cam_periph_mtx(periph);
465 mtx_lock(mtx);
466 cam_periph_release_locked(periph);
467 mtx_unlock(mtx);
468 }
469
470 int
471 cam_periph_hold(struct cam_periph *periph, int priority)
472 {
473 int error;
474
475 /*
476 * Increment the reference count on the peripheral
477 * while we wait for our lock attempt to succeed
478 * to ensure the peripheral doesn't disappear out
479 * from user us while we sleep.
480 */
481
482 if (cam_periph_acquire(periph) != CAM_REQ_CMP)
483 return (ENXIO);
484
485 cam_periph_assert(periph, MA_OWNED);
486 while ((periph->flags & CAM_PERIPH_LOCKED) != 0) {
487 periph->flags |= CAM_PERIPH_LOCK_WANTED;
488 if ((error = cam_periph_sleep(periph, periph, priority,
489 "caplck", 0)) != 0) {
490 cam_periph_release_locked(periph);
491 return (error);
492 }
493 if (periph->flags & CAM_PERIPH_INVALID) {
494 cam_periph_release_locked(periph);
495 return (ENXIO);
496 }
497 }
498
499 periph->flags |= CAM_PERIPH_LOCKED;
500 return (0);
501 }
502
503 void
504 cam_periph_unhold(struct cam_periph *periph)
505 {
506
507 cam_periph_assert(periph, MA_OWNED);
508
509 periph->flags &= ~CAM_PERIPH_LOCKED;
510 if ((periph->flags & CAM_PERIPH_LOCK_WANTED) != 0) {
511 periph->flags &= ~CAM_PERIPH_LOCK_WANTED;
512 wakeup(periph);
513 }
514
515 cam_periph_release_locked(periph);
516 }
517
518 /*
519 * Look for the next unit number that is not currently in use for this
520 * peripheral type starting at "newunit". Also exclude unit numbers that
521 * are reserved by for future "hardwiring" unless we already know that this
522 * is a potential wired device. Only assume that the device is "wired" the
523 * first time through the loop since after that we'll be looking at unit
524 * numbers that did not match a wiring entry.
525 */
526 static u_int
527 camperiphnextunit(struct periph_driver *p_drv, u_int newunit, int wired,
528 path_id_t pathid, target_id_t target, lun_id_t lun)
529 {
530 struct cam_periph *periph;
531 char *periph_name;
532 int i, val, dunit, r;
533 const char *dname, *strval;
534
535 periph_name = p_drv->driver_name;
536 for (;;newunit++) {
537
538 for (periph = TAILQ_FIRST(&p_drv->units);
539 periph != NULL && periph->unit_number != newunit;
540 periph = TAILQ_NEXT(periph, unit_links))
541 ;
542
543 if (periph != NULL && periph->unit_number == newunit) {
544 if (wired != 0) {
545 xpt_print(periph->path, "Duplicate Wired "
546 "Device entry!\n");
547 xpt_print(periph->path, "Second device (%s "
548 "device at scbus%d target %d lun %d) will "
549 "not be wired\n", periph_name, pathid,
550 target, lun);
551 wired = 0;
552 }
553 continue;
554 }
555 if (wired)
556 break;
557
558 /*
559 * Don't match entries like "da 4" as a wired down
560 * device, but do match entries like "da 4 target 5"
561 * or even "da 4 scbus 1".
562 */
563 i = 0;
564 dname = periph_name;
565 for (;;) {
566 r = resource_find_dev(&i, dname, &dunit, NULL, NULL);
567 if (r != 0)
568 break;
569 /* if no "target" and no specific scbus, skip */
570 if (resource_int_value(dname, dunit, "target", &val) &&
571 (resource_string_value(dname, dunit, "at",&strval)||
572 strcmp(strval, "scbus") == 0))
573 continue;
574 if (newunit == dunit)
575 break;
576 }
577 if (r != 0)
578 break;
579 }
580 return (newunit);
581 }
582
583 static u_int
584 camperiphunit(struct periph_driver *p_drv, path_id_t pathid,
585 target_id_t target, lun_id_t lun)
586 {
587 u_int unit;
588 int wired, i, val, dunit;
589 const char *dname, *strval;
590 char pathbuf[32], *periph_name;
591
592 periph_name = p_drv->driver_name;
593 snprintf(pathbuf, sizeof(pathbuf), "scbus%d", pathid);
594 unit = 0;
595 i = 0;
596 dname = periph_name;
597 for (wired = 0; resource_find_dev(&i, dname, &dunit, NULL, NULL) == 0;
598 wired = 0) {
599 if (resource_string_value(dname, dunit, "at", &strval) == 0) {
600 if (strcmp(strval, pathbuf) != 0)
601 continue;
602 wired++;
603 }
604 if (resource_int_value(dname, dunit, "target", &val) == 0) {
605 if (val != target)
606 continue;
607 wired++;
608 }
609 if (resource_int_value(dname, dunit, "lun", &val) == 0) {
610 if (val != lun)
611 continue;
612 wired++;
613 }
614 if (wired != 0) {
615 unit = dunit;
616 break;
617 }
618 }
619
620 /*
621 * Either start from 0 looking for the next unit or from
622 * the unit number given in the resource config. This way,
623 * if we have wildcard matches, we don't return the same
624 * unit number twice.
625 */
626 unit = camperiphnextunit(p_drv, unit, wired, pathid, target, lun);
627
628 return (unit);
629 }
630
631 void
632 cam_periph_invalidate(struct cam_periph *periph)
633 {
634
635 cam_periph_assert(periph, MA_OWNED);
636 /*
637 * We only call this routine the first time a peripheral is
638 * invalidated.
639 */
640 if ((periph->flags & CAM_PERIPH_INVALID) != 0)
641 return;
642
643 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("Periph invalidated\n"));
644 if ((periph->flags & CAM_PERIPH_ANNOUNCED) && !rebooting)
645 xpt_denounce_periph(periph);
646 periph->flags |= CAM_PERIPH_INVALID;
647 periph->flags &= ~CAM_PERIPH_NEW_DEV_FOUND;
648 if (periph->periph_oninval != NULL)
649 periph->periph_oninval(periph);
650 cam_periph_release_locked(periph);
651 }
652
653 static void
654 camperiphfree(struct cam_periph *periph)
655 {
656 struct periph_driver **p_drv;
657 struct periph_driver *drv;
658
659 cam_periph_assert(periph, MA_OWNED);
660 KASSERT(periph->periph_allocating == 0, ("%s%d: freed while allocating",
661 periph->periph_name, periph->unit_number));
662 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) {
663 if (strcmp((*p_drv)->driver_name, periph->periph_name) == 0)
664 break;
665 }
666 if (*p_drv == NULL) {
667 printf("camperiphfree: attempt to free non-existant periph\n");
668 return;
669 }
670 /*
671 * Cache a pointer to the periph_driver structure. If a
672 * periph_driver is added or removed from the array (see
673 * periphdriver_register()) while we drop the toplogy lock
674 * below, p_drv may change. This doesn't protect against this
675 * particular periph_driver going away. That will require full
676 * reference counting in the periph_driver infrastructure.
677 */
678 drv = *p_drv;
679
680 /*
681 * We need to set this flag before dropping the topology lock, to
682 * let anyone who is traversing the list that this peripheral is
683 * about to be freed, and there will be no more reference count
684 * checks.
685 */
686 periph->flags |= CAM_PERIPH_FREE;
687
688 /*
689 * The peripheral destructor semantics dictate calling with only the
690 * SIM mutex held. Since it might sleep, it should not be called
691 * with the topology lock held.
692 */
693 xpt_unlock_buses();
694
695 /*
696 * We need to call the peripheral destructor prior to removing the
697 * peripheral from the list. Otherwise, we risk running into a
698 * scenario where the peripheral unit number may get reused
699 * (because it has been removed from the list), but some resources
700 * used by the peripheral are still hanging around. In particular,
701 * the devfs nodes used by some peripherals like the pass(4) driver
702 * aren't fully cleaned up until the destructor is run. If the
703 * unit number is reused before the devfs instance is fully gone,
704 * devfs will panic.
705 */
706 if (periph->periph_dtor != NULL)
707 periph->periph_dtor(periph);
708
709 /*
710 * The peripheral list is protected by the topology lock.
711 */
712 xpt_lock_buses();
713
714 TAILQ_REMOVE(&drv->units, periph, unit_links);
715 drv->generation++;
716
717 xpt_remove_periph(periph);
718
719 xpt_unlock_buses();
720 if ((periph->flags & CAM_PERIPH_ANNOUNCED) && !rebooting)
721 xpt_print(periph->path, "Periph destroyed\n");
722 else
723 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("Periph destroyed\n"));
724
725 if (periph->flags & CAM_PERIPH_NEW_DEV_FOUND) {
726 union ccb ccb;
727 void *arg;
728
729 switch (periph->deferred_ac) {
730 case AC_FOUND_DEVICE:
731 ccb.ccb_h.func_code = XPT_GDEV_TYPE;
732 xpt_setup_ccb(&ccb.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
733 xpt_action(&ccb);
734 arg = &ccb;
735 break;
736 case AC_PATH_REGISTERED:
737 ccb.ccb_h.func_code = XPT_PATH_INQ;
738 xpt_setup_ccb(&ccb.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
739 xpt_action(&ccb);
740 arg = &ccb;
741 break;
742 default:
743 arg = NULL;
744 break;
745 }
746 periph->deferred_callback(NULL, periph->deferred_ac,
747 periph->path, arg);
748 }
749 xpt_free_path(periph->path);
750 free(periph, M_CAMPERIPH);
751 xpt_lock_buses();
752 }
753
754 /*
755 * Map user virtual pointers into kernel virtual address space, so we can
756 * access the memory. This is now a generic function that centralizes most
757 * of the sanity checks on the data flags, if any.
758 * This also only works for up to MAXPHYS memory. Since we use
759 * buffers to map stuff in and out, we're limited to the buffer size.
760 */
761 int
762 cam_periph_mapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo,
763 u_int maxmap)
764 {
765 int numbufs, i, j;
766 int flags[CAM_PERIPH_MAXMAPS];
767 u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS];
768 u_int32_t lengths[CAM_PERIPH_MAXMAPS];
769 u_int32_t dirs[CAM_PERIPH_MAXMAPS];
770
771 if (maxmap == 0)
772 maxmap = DFLTPHYS; /* traditional default */
773 else if (maxmap > MAXPHYS)
774 maxmap = MAXPHYS; /* for safety */
775 switch(ccb->ccb_h.func_code) {
776 case XPT_DEV_MATCH:
777 if (ccb->cdm.match_buf_len == 0) {
778 printf("cam_periph_mapmem: invalid match buffer "
779 "length 0\n");
780 return(EINVAL);
781 }
782 if (ccb->cdm.pattern_buf_len > 0) {
783 data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns;
784 lengths[0] = ccb->cdm.pattern_buf_len;
785 dirs[0] = CAM_DIR_OUT;
786 data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches;
787 lengths[1] = ccb->cdm.match_buf_len;
788 dirs[1] = CAM_DIR_IN;
789 numbufs = 2;
790 } else {
791 data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches;
792 lengths[0] = ccb->cdm.match_buf_len;
793 dirs[0] = CAM_DIR_IN;
794 numbufs = 1;
795 }
796 /*
797 * This request will not go to the hardware, no reason
798 * to be so strict. vmapbuf() is able to map up to MAXPHYS.
799 */
800 maxmap = MAXPHYS;
801 break;
802 case XPT_SCSI_IO:
803 case XPT_CONT_TARGET_IO:
804 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_NONE)
805 return(0);
806 if ((ccb->ccb_h.flags & CAM_DATA_MASK) != CAM_DATA_VADDR)
807 return (EINVAL);
808 data_ptrs[0] = &ccb->csio.data_ptr;
809 lengths[0] = ccb->csio.dxfer_len;
810 dirs[0] = ccb->ccb_h.flags & CAM_DIR_MASK;
811 numbufs = 1;
812 break;
813 case XPT_ATA_IO:
814 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_NONE)
815 return(0);
816 if ((ccb->ccb_h.flags & CAM_DATA_MASK) != CAM_DATA_VADDR)
817 return (EINVAL);
818 data_ptrs[0] = &ccb->ataio.data_ptr;
819 lengths[0] = ccb->ataio.dxfer_len;
820 dirs[0] = ccb->ccb_h.flags & CAM_DIR_MASK;
821 numbufs = 1;
822 break;
823 case XPT_SMP_IO:
824 data_ptrs[0] = &ccb->smpio.smp_request;
825 lengths[0] = ccb->smpio.smp_request_len;
826 dirs[0] = CAM_DIR_OUT;
827 data_ptrs[1] = &ccb->smpio.smp_response;
828 lengths[1] = ccb->smpio.smp_response_len;
829 dirs[1] = CAM_DIR_IN;
830 numbufs = 2;
831 break;
832 case XPT_DEV_ADVINFO:
833 if (ccb->cdai.bufsiz == 0)
834 return (0);
835
836 data_ptrs[0] = (uint8_t **)&ccb->cdai.buf;
837 lengths[0] = ccb->cdai.bufsiz;
838 dirs[0] = CAM_DIR_IN;
839 numbufs = 1;
840
841 /*
842 * This request will not go to the hardware, no reason
843 * to be so strict. vmapbuf() is able to map up to MAXPHYS.
844 */
845 maxmap = MAXPHYS;
846 break;
847 default:
848 return(EINVAL);
849 break; /* NOTREACHED */
850 }
851
852 /*
853 * Check the transfer length and permissions first, so we don't
854 * have to unmap any previously mapped buffers.
855 */
856 for (i = 0; i < numbufs; i++) {
857
858 flags[i] = 0;
859
860 /*
861 * The userland data pointer passed in may not be page
862 * aligned. vmapbuf() truncates the address to a page
863 * boundary, so if the address isn't page aligned, we'll
864 * need enough space for the given transfer length, plus
865 * whatever extra space is necessary to make it to the page
866 * boundary.
867 */
868 if ((lengths[i] +
869 (((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK)) > maxmap){
870 printf("cam_periph_mapmem: attempt to map %lu bytes, "
871 "which is greater than %lu\n",
872 (long)(lengths[i] +
873 (((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK)),
874 (u_long)maxmap);
875 return(E2BIG);
876 }
877
878 if (dirs[i] & CAM_DIR_OUT) {
879 flags[i] = BIO_WRITE;
880 }
881
882 if (dirs[i] & CAM_DIR_IN) {
883 flags[i] = BIO_READ;
884 }
885
886 }
887
888 /*
889 * This keeps the kernel stack of current thread from getting
890 * swapped. In low-memory situations where the kernel stack might
891 * otherwise get swapped out, this holds it and allows the thread
892 * to make progress and release the kernel mapped pages sooner.
893 *
894 * XXX KDM should I use P_NOSWAP instead?
895 */
896 PHOLD(curproc);
897
898 for (i = 0; i < numbufs; i++) {
899 /*
900 * Get the buffer.
901 */
902 mapinfo->bp[i] = getpbuf(NULL);
903
904 /* put our pointer in the data slot */
905 mapinfo->bp[i]->b_data = *data_ptrs[i];
906
907 /* save the user's data address */
908 mapinfo->bp[i]->b_caller1 = *data_ptrs[i];
909
910 /* set the transfer length, we know it's < MAXPHYS */
911 mapinfo->bp[i]->b_bufsize = lengths[i];
912
913 /* set the direction */
914 mapinfo->bp[i]->b_iocmd = flags[i];
915
916 /*
917 * Map the buffer into kernel memory.
918 *
919 * Note that useracc() alone is not a sufficient test.
920 * vmapbuf() can still fail due to a smaller file mapped
921 * into a larger area of VM, or if userland races against
922 * vmapbuf() after the useracc() check.
923 */
924 if (vmapbuf(mapinfo->bp[i], 1) < 0) {
925 for (j = 0; j < i; ++j) {
926 *data_ptrs[j] = mapinfo->bp[j]->b_caller1;
927 vunmapbuf(mapinfo->bp[j]);
928 relpbuf(mapinfo->bp[j], NULL);
929 }
930 relpbuf(mapinfo->bp[i], NULL);
931 PRELE(curproc);
932 return(EACCES);
933 }
934
935 /* set our pointer to the new mapped area */
936 *data_ptrs[i] = mapinfo->bp[i]->b_data;
937
938 mapinfo->num_bufs_used++;
939 }
940
941 /*
942 * Now that we've gotten this far, change ownership to the kernel
943 * of the buffers so that we don't run afoul of returning to user
944 * space with locks (on the buffer) held.
945 */
946 for (i = 0; i < numbufs; i++) {
947 BUF_KERNPROC(mapinfo->bp[i]);
948 }
949
950
951 return(0);
952 }
953
954 /*
955 * Unmap memory segments mapped into kernel virtual address space by
956 * cam_periph_mapmem().
957 */
958 void
959 cam_periph_unmapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo)
960 {
961 int numbufs, i;
962 u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS];
963
964 if (mapinfo->num_bufs_used <= 0) {
965 /* nothing to free and the process wasn't held. */
966 return;
967 }
968
969 switch (ccb->ccb_h.func_code) {
970 case XPT_DEV_MATCH:
971 numbufs = min(mapinfo->num_bufs_used, 2);
972
973 if (numbufs == 1) {
974 data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches;
975 } else {
976 data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns;
977 data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches;
978 }
979 break;
980 case XPT_SCSI_IO:
981 case XPT_CONT_TARGET_IO:
982 data_ptrs[0] = &ccb->csio.data_ptr;
983 numbufs = min(mapinfo->num_bufs_used, 1);
984 break;
985 case XPT_ATA_IO:
986 data_ptrs[0] = &ccb->ataio.data_ptr;
987 numbufs = min(mapinfo->num_bufs_used, 1);
988 break;
989 case XPT_SMP_IO:
990 numbufs = min(mapinfo->num_bufs_used, 2);
991 data_ptrs[0] = &ccb->smpio.smp_request;
992 data_ptrs[1] = &ccb->smpio.smp_response;
993 break;
994 case XPT_DEV_ADVINFO:
995 numbufs = min(mapinfo->num_bufs_used, 1);
996 data_ptrs[0] = (uint8_t **)&ccb->cdai.buf;
997 break;
998 default:
999 /* allow ourselves to be swapped once again */
1000 PRELE(curproc);
1001 return;
1002 break; /* NOTREACHED */
1003 }
1004
1005 for (i = 0; i < numbufs; i++) {
1006 /* Set the user's pointer back to the original value */
1007 *data_ptrs[i] = mapinfo->bp[i]->b_caller1;
1008
1009 /* unmap the buffer */
1010 vunmapbuf(mapinfo->bp[i]);
1011
1012 /* release the buffer */
1013 relpbuf(mapinfo->bp[i], NULL);
1014 }
1015
1016 /* allow ourselves to be swapped once again */
1017 PRELE(curproc);
1018 }
1019
1020 int
1021 cam_periph_ioctl(struct cam_periph *periph, u_long cmd, caddr_t addr,
1022 int (*error_routine)(union ccb *ccb,
1023 cam_flags camflags,
1024 u_int32_t sense_flags))
1025 {
1026 union ccb *ccb;
1027 int error;
1028 int found;
1029
1030 error = found = 0;
1031
1032 switch(cmd){
1033 case CAMGETPASSTHRU:
1034 ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1035 xpt_setup_ccb(&ccb->ccb_h,
1036 ccb->ccb_h.path,
1037 CAM_PRIORITY_NORMAL);
1038 ccb->ccb_h.func_code = XPT_GDEVLIST;
1039
1040 /*
1041 * Basically, the point of this is that we go through
1042 * getting the list of devices, until we find a passthrough
1043 * device. In the current version of the CAM code, the
1044 * only way to determine what type of device we're dealing
1045 * with is by its name.
1046 */
1047 while (found == 0) {
1048 ccb->cgdl.index = 0;
1049 ccb->cgdl.status = CAM_GDEVLIST_MORE_DEVS;
1050 while (ccb->cgdl.status == CAM_GDEVLIST_MORE_DEVS) {
1051
1052 /* we want the next device in the list */
1053 xpt_action(ccb);
1054 if (strncmp(ccb->cgdl.periph_name,
1055 "pass", 4) == 0){
1056 found = 1;
1057 break;
1058 }
1059 }
1060 if ((ccb->cgdl.status == CAM_GDEVLIST_LAST_DEVICE) &&
1061 (found == 0)) {
1062 ccb->cgdl.periph_name[0] = '\0';
1063 ccb->cgdl.unit_number = 0;
1064 break;
1065 }
1066 }
1067
1068 /* copy the result back out */
1069 bcopy(ccb, addr, sizeof(union ccb));
1070
1071 /* and release the ccb */
1072 xpt_release_ccb(ccb);
1073
1074 break;
1075 default:
1076 error = ENOTTY;
1077 break;
1078 }
1079 return(error);
1080 }
1081
1082 static void
1083 cam_periph_done_panic(struct cam_periph *periph, union ccb *done_ccb)
1084 {
1085
1086 panic("%s: already done with ccb %p", __func__, done_ccb);
1087 }
1088
1089 static void
1090 cam_periph_done(struct cam_periph *periph, union ccb *done_ccb)
1091 {
1092
1093 /* Caller will release the CCB */
1094 xpt_path_assert(done_ccb->ccb_h.path, MA_OWNED);
1095 done_ccb->ccb_h.cbfcnp = cam_periph_done_panic;
1096 wakeup(&done_ccb->ccb_h.cbfcnp);
1097 }
1098
1099 static void
1100 cam_periph_ccbwait(union ccb *ccb)
1101 {
1102
1103 if ((ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) {
1104 while (ccb->ccb_h.cbfcnp != cam_periph_done_panic)
1105 xpt_path_sleep(ccb->ccb_h.path, &ccb->ccb_h.cbfcnp,
1106 PRIBIO, "cbwait", 0);
1107 }
1108 KASSERT(ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX &&
1109 (ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_INPROG,
1110 ("%s: proceeding with incomplete ccb: ccb=%p, func_code=%#x, "
1111 "status=%#x, index=%d", __func__, ccb, ccb->ccb_h.func_code,
1112 ccb->ccb_h.status, ccb->ccb_h.pinfo.index));
1113 }
1114
1115 int
1116 cam_periph_runccb(union ccb *ccb,
1117 int (*error_routine)(union ccb *ccb,
1118 cam_flags camflags,
1119 u_int32_t sense_flags),
1120 cam_flags camflags, u_int32_t sense_flags,
1121 struct devstat *ds)
1122 {
1123 struct bintime *starttime;
1124 struct bintime ltime;
1125 int error;
1126
1127 starttime = NULL;
1128 xpt_path_assert(ccb->ccb_h.path, MA_OWNED);
1129 KASSERT((ccb->ccb_h.flags & CAM_UNLOCKED) == 0,
1130 ("%s: ccb=%p, func_code=%#x, flags=%#x", __func__, ccb,
1131 ccb->ccb_h.func_code, ccb->ccb_h.flags));
1132
1133 /*
1134 * If the user has supplied a stats structure, and if we understand
1135 * this particular type of ccb, record the transaction start.
1136 */
1137 if ((ds != NULL) && (ccb->ccb_h.func_code == XPT_SCSI_IO ||
1138 ccb->ccb_h.func_code == XPT_ATA_IO)) {
1139 starttime = <ime;
1140 binuptime(starttime);
1141 devstat_start_transaction(ds, starttime);
1142 }
1143
1144 ccb->ccb_h.cbfcnp = cam_periph_done;
1145 xpt_action(ccb);
1146
1147 do {
1148 cam_periph_ccbwait(ccb);
1149 if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP)
1150 error = 0;
1151 else if (error_routine != NULL) {
1152 ccb->ccb_h.cbfcnp = cam_periph_done;
1153 error = (*error_routine)(ccb, camflags, sense_flags);
1154 } else
1155 error = 0;
1156
1157 } while (error == ERESTART);
1158
1159 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
1160 cam_release_devq(ccb->ccb_h.path,
1161 /* relsim_flags */0,
1162 /* openings */0,
1163 /* timeout */0,
1164 /* getcount_only */ FALSE);
1165 ccb->ccb_h.status &= ~CAM_DEV_QFRZN;
1166 }
1167
1168 if (ds != NULL) {
1169 if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
1170 devstat_end_transaction(ds,
1171 ccb->csio.dxfer_len - ccb->csio.resid,
1172 ccb->csio.tag_action & 0x3,
1173 ((ccb->ccb_h.flags & CAM_DIR_MASK) ==
1174 CAM_DIR_NONE) ? DEVSTAT_NO_DATA :
1175 (ccb->ccb_h.flags & CAM_DIR_OUT) ?
1176 DEVSTAT_WRITE :
1177 DEVSTAT_READ, NULL, starttime);
1178 } else if (ccb->ccb_h.func_code == XPT_ATA_IO) {
1179 devstat_end_transaction(ds,
1180 ccb->ataio.dxfer_len - ccb->ataio.resid,
1181 0, /* Not used in ATA */
1182 ((ccb->ccb_h.flags & CAM_DIR_MASK) ==
1183 CAM_DIR_NONE) ? DEVSTAT_NO_DATA :
1184 (ccb->ccb_h.flags & CAM_DIR_OUT) ?
1185 DEVSTAT_WRITE :
1186 DEVSTAT_READ, NULL, starttime);
1187 }
1188 }
1189
1190 return(error);
1191 }
1192
1193 void
1194 cam_freeze_devq(struct cam_path *path)
1195 {
1196 struct ccb_hdr ccb_h;
1197
1198 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("cam_freeze_devq\n"));
1199 xpt_setup_ccb(&ccb_h, path, /*priority*/1);
1200 ccb_h.func_code = XPT_NOOP;
1201 ccb_h.flags = CAM_DEV_QFREEZE;
1202 xpt_action((union ccb *)&ccb_h);
1203 }
1204
1205 u_int32_t
1206 cam_release_devq(struct cam_path *path, u_int32_t relsim_flags,
1207 u_int32_t openings, u_int32_t arg,
1208 int getcount_only)
1209 {
1210 struct ccb_relsim crs;
1211
1212 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("cam_release_devq(%u, %u, %u, %d)\n",
1213 relsim_flags, openings, arg, getcount_only));
1214 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
1215 crs.ccb_h.func_code = XPT_REL_SIMQ;
1216 crs.ccb_h.flags = getcount_only ? CAM_DEV_QFREEZE : 0;
1217 crs.release_flags = relsim_flags;
1218 crs.openings = openings;
1219 crs.release_timeout = arg;
1220 xpt_action((union ccb *)&crs);
1221 return (crs.qfrozen_cnt);
1222 }
1223
1224 #define saved_ccb_ptr ppriv_ptr0
1225 static void
1226 camperiphdone(struct cam_periph *periph, union ccb *done_ccb)
1227 {
1228 union ccb *saved_ccb;
1229 cam_status status;
1230 struct scsi_start_stop_unit *scsi_cmd;
1231 int error_code, sense_key, asc, ascq;
1232
1233 scsi_cmd = (struct scsi_start_stop_unit *)
1234 &done_ccb->csio.cdb_io.cdb_bytes;
1235 status = done_ccb->ccb_h.status;
1236
1237 if ((status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1238 if (scsi_extract_sense_ccb(done_ccb,
1239 &error_code, &sense_key, &asc, &ascq)) {
1240 /*
1241 * If the error is "invalid field in CDB",
1242 * and the load/eject flag is set, turn the
1243 * flag off and try again. This is just in
1244 * case the drive in question barfs on the
1245 * load eject flag. The CAM code should set
1246 * the load/eject flag by default for
1247 * removable media.
1248 */
1249 if ((scsi_cmd->opcode == START_STOP_UNIT) &&
1250 ((scsi_cmd->how & SSS_LOEJ) != 0) &&
1251 (asc == 0x24) && (ascq == 0x00)) {
1252 scsi_cmd->how &= ~SSS_LOEJ;
1253 if (status & CAM_DEV_QFRZN) {
1254 cam_release_devq(done_ccb->ccb_h.path,
1255 0, 0, 0, 0);
1256 done_ccb->ccb_h.status &=
1257 ~CAM_DEV_QFRZN;
1258 }
1259 xpt_action(done_ccb);
1260 goto out;
1261 }
1262 }
1263 if (cam_periph_error(done_ccb,
1264 0, SF_RETRY_UA | SF_NO_PRINT, NULL) == ERESTART)
1265 goto out;
1266 if (done_ccb->ccb_h.status & CAM_DEV_QFRZN) {
1267 cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0);
1268 done_ccb->ccb_h.status &= ~CAM_DEV_QFRZN;
1269 }
1270 } else {
1271 /*
1272 * If we have successfully taken a device from the not
1273 * ready to ready state, re-scan the device and re-get
1274 * the inquiry information. Many devices (mostly disks)
1275 * don't properly report their inquiry information unless
1276 * they are spun up.
1277 */
1278 if (scsi_cmd->opcode == START_STOP_UNIT)
1279 xpt_async(AC_INQ_CHANGED, done_ccb->ccb_h.path, NULL);
1280 }
1281
1282 /*
1283 * Perform the final retry with the original CCB so that final
1284 * error processing is performed by the owner of the CCB.
1285 */
1286 saved_ccb = (union ccb *)done_ccb->ccb_h.saved_ccb_ptr;
1287 bcopy(saved_ccb, done_ccb, sizeof(*done_ccb));
1288 xpt_free_ccb(saved_ccb);
1289 if (done_ccb->ccb_h.cbfcnp != camperiphdone)
1290 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG;
1291 xpt_action(done_ccb);
1292
1293 out:
1294 /* Drop freeze taken due to CAM_DEV_QFREEZE flag set. */
1295 cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0);
1296 }
1297
1298 /*
1299 * Generic Async Event handler. Peripheral drivers usually
1300 * filter out the events that require personal attention,
1301 * and leave the rest to this function.
1302 */
1303 void
1304 cam_periph_async(struct cam_periph *periph, u_int32_t code,
1305 struct cam_path *path, void *arg)
1306 {
1307 switch (code) {
1308 case AC_LOST_DEVICE:
1309 cam_periph_invalidate(periph);
1310 break;
1311 default:
1312 break;
1313 }
1314 }
1315
1316 void
1317 cam_periph_bus_settle(struct cam_periph *periph, u_int bus_settle)
1318 {
1319 struct ccb_getdevstats cgds;
1320
1321 xpt_setup_ccb(&cgds.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
1322 cgds.ccb_h.func_code = XPT_GDEV_STATS;
1323 xpt_action((union ccb *)&cgds);
1324 cam_periph_freeze_after_event(periph, &cgds.last_reset, bus_settle);
1325 }
1326
1327 void
1328 cam_periph_freeze_after_event(struct cam_periph *periph,
1329 struct timeval* event_time, u_int duration_ms)
1330 {
1331 struct timeval delta;
1332 struct timeval duration_tv;
1333
1334 if (!timevalisset(event_time))
1335 return;
1336
1337 microtime(&delta);
1338 timevalsub(&delta, event_time);
1339 duration_tv.tv_sec = duration_ms / 1000;
1340 duration_tv.tv_usec = (duration_ms % 1000) * 1000;
1341 if (timevalcmp(&delta, &duration_tv, <)) {
1342 timevalsub(&duration_tv, &delta);
1343
1344 duration_ms = duration_tv.tv_sec * 1000;
1345 duration_ms += duration_tv.tv_usec / 1000;
1346 cam_freeze_devq(periph->path);
1347 cam_release_devq(periph->path,
1348 RELSIM_RELEASE_AFTER_TIMEOUT,
1349 /*reduction*/0,
1350 /*timeout*/duration_ms,
1351 /*getcount_only*/0);
1352 }
1353
1354 }
1355
1356 static int
1357 camperiphscsistatuserror(union ccb *ccb, union ccb **orig_ccb,
1358 cam_flags camflags, u_int32_t sense_flags,
1359 int *openings, u_int32_t *relsim_flags,
1360 u_int32_t *timeout, u_int32_t *action, const char **action_string)
1361 {
1362 int error;
1363
1364 switch (ccb->csio.scsi_status) {
1365 case SCSI_STATUS_OK:
1366 case SCSI_STATUS_COND_MET:
1367 case SCSI_STATUS_INTERMED:
1368 case SCSI_STATUS_INTERMED_COND_MET:
1369 error = 0;
1370 break;
1371 case SCSI_STATUS_CMD_TERMINATED:
1372 case SCSI_STATUS_CHECK_COND:
1373 error = camperiphscsisenseerror(ccb, orig_ccb,
1374 camflags,
1375 sense_flags,
1376 openings,
1377 relsim_flags,
1378 timeout,
1379 action,
1380 action_string);
1381 break;
1382 case SCSI_STATUS_QUEUE_FULL:
1383 {
1384 /* no decrement */
1385 struct ccb_getdevstats cgds;
1386
1387 /*
1388 * First off, find out what the current
1389 * transaction counts are.
1390 */
1391 xpt_setup_ccb(&cgds.ccb_h,
1392 ccb->ccb_h.path,
1393 CAM_PRIORITY_NORMAL);
1394 cgds.ccb_h.func_code = XPT_GDEV_STATS;
1395 xpt_action((union ccb *)&cgds);
1396
1397 /*
1398 * If we were the only transaction active, treat
1399 * the QUEUE FULL as if it were a BUSY condition.
1400 */
1401 if (cgds.dev_active != 0) {
1402 int total_openings;
1403
1404 /*
1405 * Reduce the number of openings to
1406 * be 1 less than the amount it took
1407 * to get a queue full bounded by the
1408 * minimum allowed tag count for this
1409 * device.
1410 */
1411 total_openings = cgds.dev_active + cgds.dev_openings;
1412 *openings = cgds.dev_active;
1413 if (*openings < cgds.mintags)
1414 *openings = cgds.mintags;
1415 if (*openings < total_openings)
1416 *relsim_flags = RELSIM_ADJUST_OPENINGS;
1417 else {
1418 /*
1419 * Some devices report queue full for
1420 * temporary resource shortages. For
1421 * this reason, we allow a minimum
1422 * tag count to be entered via a
1423 * quirk entry to prevent the queue
1424 * count on these devices from falling
1425 * to a pessimisticly low value. We
1426 * still wait for the next successful
1427 * completion, however, before queueing
1428 * more transactions to the device.
1429 */
1430 *relsim_flags = RELSIM_RELEASE_AFTER_CMDCMPLT;
1431 }
1432 *timeout = 0;
1433 error = ERESTART;
1434 *action &= ~SSQ_PRINT_SENSE;
1435 break;
1436 }
1437 /* FALLTHROUGH */
1438 }
1439 case SCSI_STATUS_BUSY:
1440 /*
1441 * Restart the queue after either another
1442 * command completes or a 1 second timeout.
1443 */
1444 if ((sense_flags & SF_RETRY_BUSY) != 0 ||
1445 (ccb->ccb_h.retry_count--) > 0) {
1446 error = ERESTART;
1447 *relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT
1448 | RELSIM_RELEASE_AFTER_CMDCMPLT;
1449 *timeout = 1000;
1450 } else {
1451 error = EIO;
1452 }
1453 break;
1454 case SCSI_STATUS_RESERV_CONFLICT:
1455 default:
1456 error = EIO;
1457 break;
1458 }
1459 return (error);
1460 }
1461
1462 static int
1463 camperiphscsisenseerror(union ccb *ccb, union ccb **orig,
1464 cam_flags camflags, u_int32_t sense_flags,
1465 int *openings, u_int32_t *relsim_flags,
1466 u_int32_t *timeout, u_int32_t *action, const char **action_string)
1467 {
1468 struct cam_periph *periph;
1469 union ccb *orig_ccb = ccb;
1470 int error, recoveryccb;
1471
1472 periph = xpt_path_periph(ccb->ccb_h.path);
1473 recoveryccb = (ccb->ccb_h.cbfcnp == camperiphdone);
1474 if ((periph->flags & CAM_PERIPH_RECOVERY_INPROG) && !recoveryccb) {
1475 /*
1476 * If error recovery is already in progress, don't attempt
1477 * to process this error, but requeue it unconditionally
1478 * and attempt to process it once error recovery has
1479 * completed. This failed command is probably related to
1480 * the error that caused the currently active error recovery
1481 * action so our current recovery efforts should also
1482 * address this command. Be aware that the error recovery
1483 * code assumes that only one recovery action is in progress
1484 * on a particular peripheral instance at any given time
1485 * (e.g. only one saved CCB for error recovery) so it is
1486 * imperitive that we don't violate this assumption.
1487 */
1488 error = ERESTART;
1489 *action &= ~SSQ_PRINT_SENSE;
1490 } else {
1491 scsi_sense_action err_action;
1492 struct ccb_getdev cgd;
1493
1494 /*
1495 * Grab the inquiry data for this device.
1496 */
1497 xpt_setup_ccb(&cgd.ccb_h, ccb->ccb_h.path, CAM_PRIORITY_NORMAL);
1498 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
1499 xpt_action((union ccb *)&cgd);
1500
1501 err_action = scsi_error_action(&ccb->csio, &cgd.inq_data,
1502 sense_flags);
1503 error = err_action & SS_ERRMASK;
1504
1505 /*
1506 * Do not autostart sequential access devices
1507 * to avoid unexpected tape loading.
1508 */
1509 if ((err_action & SS_MASK) == SS_START &&
1510 SID_TYPE(&cgd.inq_data) == T_SEQUENTIAL) {
1511 *action_string = "Will not autostart a "
1512 "sequential access device";
1513 goto sense_error_done;
1514 }
1515
1516 /*
1517 * Avoid recovery recursion if recovery action is the same.
1518 */
1519 if ((err_action & SS_MASK) >= SS_START && recoveryccb) {
1520 if (((err_action & SS_MASK) == SS_START &&
1521 ccb->csio.cdb_io.cdb_bytes[0] == START_STOP_UNIT) ||
1522 ((err_action & SS_MASK) == SS_TUR &&
1523 (ccb->csio.cdb_io.cdb_bytes[0] == TEST_UNIT_READY))) {
1524 err_action = SS_RETRY|SSQ_DECREMENT_COUNT|EIO;
1525 *relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT;
1526 *timeout = 500;
1527 }
1528 }
1529
1530 /*
1531 * If the recovery action will consume a retry,
1532 * make sure we actually have retries available.
1533 */
1534 if ((err_action & SSQ_DECREMENT_COUNT) != 0) {
1535 if (ccb->ccb_h.retry_count > 0 &&
1536 (periph->flags & CAM_PERIPH_INVALID) == 0)
1537 ccb->ccb_h.retry_count--;
1538 else {
1539 *action_string = "Retries exhausted";
1540 goto sense_error_done;
1541 }
1542 }
1543
1544 if ((err_action & SS_MASK) >= SS_START) {
1545 /*
1546 * Do common portions of commands that
1547 * use recovery CCBs.
1548 */
1549 orig_ccb = xpt_alloc_ccb_nowait();
1550 if (orig_ccb == NULL) {
1551 *action_string = "Can't allocate recovery CCB";
1552 goto sense_error_done;
1553 }
1554 /*
1555 * Clear freeze flag for original request here, as
1556 * this freeze will be dropped as part of ERESTART.
1557 */
1558 ccb->ccb_h.status &= ~CAM_DEV_QFRZN;
1559 bcopy(ccb, orig_ccb, sizeof(*orig_ccb));
1560 }
1561
1562 switch (err_action & SS_MASK) {
1563 case SS_NOP:
1564 *action_string = "No recovery action needed";
1565 error = 0;
1566 break;
1567 case SS_RETRY:
1568 *action_string = "Retrying command (per sense data)";
1569 error = ERESTART;
1570 break;
1571 case SS_FAIL:
1572 *action_string = "Unretryable error";
1573 break;
1574 case SS_START:
1575 {
1576 int le;
1577
1578 /*
1579 * Send a start unit command to the device, and
1580 * then retry the command.
1581 */
1582 *action_string = "Attempting to start unit";
1583 periph->flags |= CAM_PERIPH_RECOVERY_INPROG;
1584
1585 /*
1586 * Check for removable media and set
1587 * load/eject flag appropriately.
1588 */
1589 if (SID_IS_REMOVABLE(&cgd.inq_data))
1590 le = TRUE;
1591 else
1592 le = FALSE;
1593
1594 scsi_start_stop(&ccb->csio,
1595 /*retries*/1,
1596 camperiphdone,
1597 MSG_SIMPLE_Q_TAG,
1598 /*start*/TRUE,
1599 /*load/eject*/le,
1600 /*immediate*/FALSE,
1601 SSD_FULL_SIZE,
1602 /*timeout*/50000);
1603 break;
1604 }
1605 case SS_TUR:
1606 {
1607 /*
1608 * Send a Test Unit Ready to the device.
1609 * If the 'many' flag is set, we send 120
1610 * test unit ready commands, one every half
1611 * second. Otherwise, we just send one TUR.
1612 * We only want to do this if the retry
1613 * count has not been exhausted.
1614 */
1615 int retries;
1616
1617 if ((err_action & SSQ_MANY) != 0) {
1618 *action_string = "Polling device for readiness";
1619 retries = 120;
1620 } else {
1621 *action_string = "Testing device for readiness";
1622 retries = 1;
1623 }
1624 periph->flags |= CAM_PERIPH_RECOVERY_INPROG;
1625 scsi_test_unit_ready(&ccb->csio,
1626 retries,
1627 camperiphdone,
1628 MSG_SIMPLE_Q_TAG,
1629 SSD_FULL_SIZE,
1630 /*timeout*/5000);
1631
1632 /*
1633 * Accomplish our 500ms delay by deferring
1634 * the release of our device queue appropriately.
1635 */
1636 *relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT;
1637 *timeout = 500;
1638 break;
1639 }
1640 default:
1641 panic("Unhandled error action %x", err_action);
1642 }
1643
1644 if ((err_action & SS_MASK) >= SS_START) {
1645 /*
1646 * Drop the priority, so that the recovery
1647 * CCB is the first to execute. Freeze the queue
1648 * after this command is sent so that we can
1649 * restore the old csio and have it queued in
1650 * the proper order before we release normal
1651 * transactions to the device.
1652 */
1653 ccb->ccb_h.pinfo.priority--;
1654 ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
1655 ccb->ccb_h.saved_ccb_ptr = orig_ccb;
1656 error = ERESTART;
1657 *orig = orig_ccb;
1658 }
1659
1660 sense_error_done:
1661 *action = err_action;
1662 }
1663 return (error);
1664 }
1665
1666 /*
1667 * Generic error handler. Peripheral drivers usually filter
1668 * out the errors that they handle in a unique manner, then
1669 * call this function.
1670 */
1671 int
1672 cam_periph_error(union ccb *ccb, cam_flags camflags,
1673 u_int32_t sense_flags, union ccb *save_ccb)
1674 {
1675 struct cam_path *newpath;
1676 union ccb *orig_ccb, *scan_ccb;
1677 struct cam_periph *periph;
1678 const char *action_string;
1679 cam_status status;
1680 int frozen, error, openings, devctl_err;
1681 u_int32_t action, relsim_flags, timeout;
1682
1683 action = SSQ_PRINT_SENSE;
1684 periph = xpt_path_periph(ccb->ccb_h.path);
1685 action_string = NULL;
1686 status = ccb->ccb_h.status;
1687 frozen = (status & CAM_DEV_QFRZN) != 0;
1688 status &= CAM_STATUS_MASK;
1689 devctl_err = openings = relsim_flags = timeout = 0;
1690 orig_ccb = ccb;
1691
1692 /* Filter the errors that should be reported via devctl */
1693 switch (ccb->ccb_h.status & CAM_STATUS_MASK) {
1694 case CAM_CMD_TIMEOUT:
1695 case CAM_REQ_ABORTED:
1696 case CAM_REQ_CMP_ERR:
1697 case CAM_REQ_TERMIO:
1698 case CAM_UNREC_HBA_ERROR:
1699 case CAM_DATA_RUN_ERR:
1700 case CAM_SCSI_STATUS_ERROR:
1701 case CAM_ATA_STATUS_ERROR:
1702 case CAM_SMP_STATUS_ERROR:
1703 devctl_err++;
1704 break;
1705 default:
1706 break;
1707 }
1708
1709 switch (status) {
1710 case CAM_REQ_CMP:
1711 error = 0;
1712 action &= ~SSQ_PRINT_SENSE;
1713 break;
1714 case CAM_SCSI_STATUS_ERROR:
1715 error = camperiphscsistatuserror(ccb, &orig_ccb,
1716 camflags, sense_flags, &openings, &relsim_flags,
1717 &timeout, &action, &action_string);
1718 break;
1719 case CAM_AUTOSENSE_FAIL:
1720 error = EIO; /* we have to kill the command */
1721 break;
1722 case CAM_UA_ABORT:
1723 case CAM_UA_TERMIO:
1724 case CAM_MSG_REJECT_REC:
1725 /* XXX Don't know that these are correct */
1726 error = EIO;
1727 break;
1728 case CAM_SEL_TIMEOUT:
1729 if ((camflags & CAM_RETRY_SELTO) != 0) {
1730 if (ccb->ccb_h.retry_count > 0 &&
1731 (periph->flags & CAM_PERIPH_INVALID) == 0) {
1732 ccb->ccb_h.retry_count--;
1733 error = ERESTART;
1734
1735 /*
1736 * Wait a bit to give the device
1737 * time to recover before we try again.
1738 */
1739 relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT;
1740 timeout = periph_selto_delay;
1741 break;
1742 }
1743 action_string = "Retries exhausted";
1744 }
1745 /* FALLTHROUGH */
1746 case CAM_DEV_NOT_THERE:
1747 error = ENXIO;
1748 action = SSQ_LOST;
1749 break;
1750 case CAM_REQ_INVALID:
1751 case CAM_PATH_INVALID:
1752 case CAM_NO_HBA:
1753 case CAM_PROVIDE_FAIL:
1754 case CAM_REQ_TOO_BIG:
1755 case CAM_LUN_INVALID:
1756 case CAM_TID_INVALID:
1757 case CAM_FUNC_NOTAVAIL:
1758 error = EINVAL;
1759 break;
1760 case CAM_SCSI_BUS_RESET:
1761 case CAM_BDR_SENT:
1762 /*
1763 * Commands that repeatedly timeout and cause these
1764 * kinds of error recovery actions, should return
1765 * CAM_CMD_TIMEOUT, which allows us to safely assume
1766 * that this command was an innocent bystander to
1767 * these events and should be unconditionally
1768 * retried.
1769 */
1770 case CAM_REQUEUE_REQ:
1771 /* Unconditional requeue if device is still there */
1772 if (periph->flags & CAM_PERIPH_INVALID) {
1773 action_string = "Periph was invalidated";
1774 error = EIO;
1775 } else if (sense_flags & SF_NO_RETRY) {
1776 error = EIO;
1777 action_string = "Retry was blocked";
1778 } else {
1779 error = ERESTART;
1780 action &= ~SSQ_PRINT_SENSE;
1781 }
1782 break;
1783 case CAM_RESRC_UNAVAIL:
1784 /* Wait a bit for the resource shortage to abate. */
1785 timeout = periph_noresrc_delay;
1786 /* FALLTHROUGH */
1787 case CAM_BUSY:
1788 if (timeout == 0) {
1789 /* Wait a bit for the busy condition to abate. */
1790 timeout = periph_busy_delay;
1791 }
1792 relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT;
1793 /* FALLTHROUGH */
1794 case CAM_ATA_STATUS_ERROR:
1795 case CAM_REQ_CMP_ERR:
1796 case CAM_CMD_TIMEOUT:
1797 case CAM_UNEXP_BUSFREE:
1798 case CAM_UNCOR_PARITY:
1799 case CAM_DATA_RUN_ERR:
1800 default:
1801 if (periph->flags & CAM_PERIPH_INVALID) {
1802 error = EIO;
1803 action_string = "Periph was invalidated";
1804 } else if (ccb->ccb_h.retry_count == 0) {
1805 error = EIO;
1806 action_string = "Retries exhausted";
1807 } else if (sense_flags & SF_NO_RETRY) {
1808 error = EIO;
1809 action_string = "Retry was blocked";
1810 } else {
1811 ccb->ccb_h.retry_count--;
1812 error = ERESTART;
1813 }
1814 break;
1815 }
1816
1817 if ((sense_flags & SF_PRINT_ALWAYS) ||
1818 CAM_DEBUGGED(ccb->ccb_h.path, CAM_DEBUG_INFO))
1819 action |= SSQ_PRINT_SENSE;
1820 else if (sense_flags & SF_NO_PRINT)
1821 action &= ~SSQ_PRINT_SENSE;
1822 if ((action & SSQ_PRINT_SENSE) != 0)
1823 cam_error_print(orig_ccb, CAM_ESF_ALL, CAM_EPF_ALL);
1824 if (error != 0 && (action & SSQ_PRINT_SENSE) != 0) {
1825 if (error != ERESTART) {
1826 if (action_string == NULL)
1827 action_string = "Unretryable error";
1828 xpt_print(ccb->ccb_h.path, "Error %d, %s\n",
1829 error, action_string);
1830 } else if (action_string != NULL)
1831 xpt_print(ccb->ccb_h.path, "%s\n", action_string);
1832 else
1833 xpt_print(ccb->ccb_h.path, "Retrying command\n");
1834 }
1835
1836 if (devctl_err && (error != 0 || (action & SSQ_PRINT_SENSE) != 0))
1837 cam_periph_devctl_notify(orig_ccb);
1838
1839 if ((action & SSQ_LOST) != 0) {
1840 lun_id_t lun_id;
1841
1842 /*
1843 * For a selection timeout, we consider all of the LUNs on
1844 * the target to be gone. If the status is CAM_DEV_NOT_THERE,
1845 * then we only get rid of the device(s) specified by the
1846 * path in the original CCB.
1847 */
1848 if (status == CAM_SEL_TIMEOUT)
1849 lun_id = CAM_LUN_WILDCARD;
1850 else
1851 lun_id = xpt_path_lun_id(ccb->ccb_h.path);
1852
1853 /* Should we do more if we can't create the path?? */
1854 if (xpt_create_path(&newpath, periph,
1855 xpt_path_path_id(ccb->ccb_h.path),
1856 xpt_path_target_id(ccb->ccb_h.path),
1857 lun_id) == CAM_REQ_CMP) {
1858
1859 /*
1860 * Let peripheral drivers know that this
1861 * device has gone away.
1862 */
1863 xpt_async(AC_LOST_DEVICE, newpath, NULL);
1864 xpt_free_path(newpath);
1865 }
1866 }
1867
1868 /* Broadcast UNIT ATTENTIONs to all periphs. */
1869 if ((action & SSQ_UA) != 0)
1870 xpt_async(AC_UNIT_ATTENTION, orig_ccb->ccb_h.path, orig_ccb);
1871
1872 /* Rescan target on "Reported LUNs data has changed" */
1873 if ((action & SSQ_RESCAN) != 0) {
1874 if (xpt_create_path(&newpath, NULL,
1875 xpt_path_path_id(ccb->ccb_h.path),
1876 xpt_path_target_id(ccb->ccb_h.path),
1877 CAM_LUN_WILDCARD) == CAM_REQ_CMP) {
1878
1879 scan_ccb = xpt_alloc_ccb_nowait();
1880 if (scan_ccb != NULL) {
1881 scan_ccb->ccb_h.path = newpath;
1882 scan_ccb->ccb_h.func_code = XPT_SCAN_TGT;
1883 scan_ccb->crcn.flags = 0;
1884 xpt_rescan(scan_ccb);
1885 } else {
1886 xpt_print(newpath,
1887 "Can't allocate CCB to rescan target\n");
1888 xpt_free_path(newpath);
1889 }
1890 }
1891 }
1892
1893 /* Attempt a retry */
1894 if (error == ERESTART || error == 0) {
1895 if (frozen != 0)
1896 ccb->ccb_h.status &= ~CAM_DEV_QFRZN;
1897 if (error == ERESTART)
1898 xpt_action(ccb);
1899 if (frozen != 0)
1900 cam_release_devq(ccb->ccb_h.path,
1901 relsim_flags,
1902 openings,
1903 timeout,
1904 /*getcount_only*/0);
1905 }
1906
1907 return (error);
1908 }
1909
1910 #define CAM_PERIPH_DEVD_MSG_SIZE 256
1911
1912 static void
1913 cam_periph_devctl_notify(union ccb *ccb)
1914 {
1915 struct cam_periph *periph;
1916 struct ccb_getdev *cgd;
1917 struct sbuf sb;
1918 int serr, sk, asc, ascq;
1919 char *sbmsg, *type;
1920
1921 sbmsg = malloc(CAM_PERIPH_DEVD_MSG_SIZE, M_CAMPERIPH, M_NOWAIT);
1922 if (sbmsg == NULL)
1923 return;
1924
1925 sbuf_new(&sb, sbmsg, CAM_PERIPH_DEVD_MSG_SIZE, SBUF_FIXEDLEN);
1926
1927 periph = xpt_path_periph(ccb->ccb_h.path);
1928 sbuf_printf(&sb, "device=%s%d ", periph->periph_name,
1929 periph->unit_number);
1930
1931 sbuf_printf(&sb, "serial=\"");
1932 if ((cgd = (struct ccb_getdev *)xpt_alloc_ccb_nowait()) != NULL) {
1933 xpt_setup_ccb(&cgd->ccb_h, ccb->ccb_h.path,
1934 CAM_PRIORITY_NORMAL);
1935 cgd->ccb_h.func_code = XPT_GDEV_TYPE;
1936 xpt_action((union ccb *)cgd);
1937
1938 if (cgd->ccb_h.status == CAM_REQ_CMP)
1939 sbuf_bcat(&sb, cgd->serial_num, cgd->serial_num_len);
1940 xpt_free_ccb((union ccb *)cgd);
1941 }
1942 sbuf_printf(&sb, "\" ");
1943 sbuf_printf(&sb, "cam_status=\"0x%x\" ", ccb->ccb_h.status);
1944
1945 switch (ccb->ccb_h.status & CAM_STATUS_MASK) {
1946 case CAM_CMD_TIMEOUT:
1947 sbuf_printf(&sb, "timeout=%d ", ccb->ccb_h.timeout);
1948 type = "timeout";
1949 break;
1950 case CAM_SCSI_STATUS_ERROR:
1951 sbuf_printf(&sb, "scsi_status=%d ", ccb->csio.scsi_status);
1952 if (scsi_extract_sense_ccb(ccb, &serr, &sk, &asc, &ascq))
1953 sbuf_printf(&sb, "scsi_sense=\"%02x %02x %02x %02x\" ",
1954 serr, sk, asc, ascq);
1955 type = "error";
1956 break;
1957 case CAM_ATA_STATUS_ERROR:
1958 sbuf_printf(&sb, "RES=\"");
1959 ata_res_sbuf(&ccb->ataio.res, &sb);
1960 sbuf_printf(&sb, "\" ");
1961 type = "error";
1962 break;
1963 default:
1964 type = "error";
1965 break;
1966 }
1967
1968 if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
1969 sbuf_printf(&sb, "CDB=\"");
1970 scsi_cdb_sbuf(scsiio_cdb_ptr(&ccb->csio), &sb);
1971 sbuf_printf(&sb, "\" ");
1972 } else if (ccb->ccb_h.func_code == XPT_ATA_IO) {
1973 sbuf_printf(&sb, "ACB=\"");
1974 ata_cmd_sbuf(&ccb->ataio.cmd, &sb);
1975 sbuf_printf(&sb, "\" ");
1976 }
1977
1978 if (sbuf_finish(&sb) == 0)
1979 devctl_notify("CAM", "periph", type, sbuf_data(&sb));
1980 sbuf_delete(&sb);
1981 free(sbmsg, M_CAMPERIPH);
1982 }
1983
Cache object: ede277c685e21dceaa6e590405cbc434
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