1 /*
2 * Copyright (c) 1997, 1998, 1999, 2002 Kenneth D. Merry.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. The name of the author may not be used to endorse or promote products
11 * derived from this software without specific prior written permission.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 *
25 * $FreeBSD: src/lib/libcam/camlib.c,v 1.8.2.2 2002/05/23 04:19:22 ken Exp $
26 */
27
28 #include <sys/types.h>
29 #include <sys/param.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33 #include <fcntl.h>
34 #include <unistd.h>
35 #include <errno.h>
36 #include <ctype.h>
37
38 #include <bus/cam/cam.h>
39 #include <bus/cam/scsi/scsi_all.h>
40 #include <bus/cam/cam_ccb.h>
41 #include <bus/cam/scsi/scsi_pass.h>
42 #include "camlib.h"
43
44 struct cam_devequiv {
45 char *given_dev;
46 char *real_dev;
47 };
48
49 struct cam_devequiv devmatchtable[] = {
50 {"sd", "da"},
51 {"st", "sa"}
52 };
53
54 char cam_errbuf[CAM_ERRBUF_SIZE];
55
56 static struct cam_device *cam_real_open_device(const char *path, int flags,
57 struct cam_device *device,
58 const char *given_path,
59 const char *given_dev_name,
60 int given_unit_number);
61 static struct cam_device *cam_lookup_pass(const char *dev_name, int unit,
62 int flags, const char *given_path,
63 struct cam_device *device);
64
65 /*
66 * Send a ccb to a passthrough device.
67 */
68 int
cam_send_ccb(struct cam_device * device,union ccb * ccb)69 cam_send_ccb(struct cam_device *device, union ccb *ccb)
70 {
71 return(ioctl(device->fd, CAMIOCOMMAND, ccb));
72 }
73
74 /*
75 * Malloc a CCB, zero out the header and set its path, target and lun ids.
76 */
77 union ccb *
cam_getccb(struct cam_device * dev)78 cam_getccb(struct cam_device *dev)
79 {
80 union ccb *ccb;
81
82 ccb = (union ccb *)malloc(sizeof(union ccb));
83 if (ccb != NULL) {
84 bzero(&ccb->ccb_h, sizeof(struct ccb_hdr));
85 ccb->ccb_h.path_id = dev->path_id;
86 ccb->ccb_h.target_id = dev->target_id;
87 ccb->ccb_h.target_lun = dev->target_lun;
88 }
89
90 return(ccb);
91 }
92
93 /*
94 * Free a CCB.
95 */
96 void
cam_freeccb(union ccb * ccb)97 cam_freeccb(union ccb *ccb)
98 {
99 free(ccb);
100 }
101
102 /*
103 * Take a device name or path passed in by the user, and attempt to figure
104 * out the device name and unit number. Some possible device name formats are:
105 * /dev/foo0a
106 * /dev/rfoo0a
107 * /dev/rfoos2c
108 * foo0
109 * foo0a
110 * rfoo0
111 * rfoo0a
112 * nrfoo0
113 *
114 * If the caller passes in an old style device name like 'sd' or 'st',
115 * it will be converted to the new style device name based upon devmatchtable
116 * above.
117 *
118 * Input parameters: device name/path, length of devname string
119 * Output: device name, unit number
120 * Return values: returns 0 for success, -1 for failure
121 */
122 int
cam_get_device(const char * path,char * dev_name,int devnamelen,int * unit)123 cam_get_device(const char *path, char *dev_name, int devnamelen, int *unit)
124 {
125 char *func_name = "cam_get_device";
126 char *tmpstr, *tmpstr2;
127 char *newpath;
128 int unit_offset;
129 int i, found = 0;
130
131
132 if (path == NULL) {
133 sprintf(cam_errbuf, "%s: device pathname was NULL", func_name);
134 return(-1);
135 }
136
137 /*
138 * We can be rather destructive to the path string. Make a copy of
139 * it so we don't hose the user's string.
140 */
141 newpath = (char *)strdup(path);
142 tmpstr = newpath;
143
144 /* Get rid of any leading white space */
145 while (isspace(*tmpstr) && (*tmpstr != '\0'))
146 tmpstr++;
147
148 /*
149 * Check to see whether we have an absolute pathname.
150 */
151 if (*tmpstr == '/') {
152 tmpstr2 = tmpstr;
153 tmpstr = (char *)rindex(tmpstr2, '/');
154 if ((tmpstr != NULL) && (*tmpstr != '\0'))
155 tmpstr++;
156 }
157
158 if (*tmpstr == '\0') {
159 sprintf(cam_errbuf, "%s: no text after slash", func_name);
160 free(newpath);
161 return(-1);
162 }
163
164 /*
165 * Check to see whether the user has given us a nonrewound tape
166 * device.
167 */
168 if (*tmpstr == 'n')
169 tmpstr++;
170
171 if (*tmpstr == '\0') {
172 sprintf(cam_errbuf, "%s: no text after leading 'n'", func_name);
173 free(newpath);
174 return(-1);
175 }
176
177 /*
178 * See if the user has given us a character device.
179 */
180 if (*tmpstr == 'r')
181 tmpstr++;
182
183 if (*tmpstr == '\0') {
184 sprintf(cam_errbuf, "%s: no text after leading 'r'", func_name);
185 free(newpath);
186 return(-1);
187 }
188
189 /*
190 * Try to get rid of any trailing white space or partition letters.
191 */
192 tmpstr2 = &tmpstr[strlen(tmpstr) - 1];
193
194 while ((*tmpstr2 != '\0') && (tmpstr2 > tmpstr) &&(!isdigit(*tmpstr2))){
195 *tmpstr2 = '\0';
196 tmpstr2--;
197 }
198
199 /*
200 * Check to see whether we have been given a partition with a slice
201 * name. If so, get rid of the slice name/number.
202 */
203 if (strlen(tmpstr) > 3) {
204 /*
205 * Basically, we're looking for a string that ends in the
206 * following general manner: 1s1 -- a number, the letter
207 * s, and then another number. This indicates that the
208 * user has given us a slice. We substitute nulls for the
209 * s and the slice number.
210 */
211 if ((isdigit(tmpstr[strlen(tmpstr) - 1]))
212 && (tmpstr[strlen(tmpstr) - 2] == 's')
213 && (isdigit(tmpstr[strlen(tmpstr) - 3]))) {
214 tmpstr[strlen(tmpstr) - 1] = '\0';
215 tmpstr[strlen(tmpstr) - 1] = '\0';
216 }
217 }
218
219 /*
220 * After we nuke off the slice, we should have just a device name
221 * and unit number. That means there must be at least 2
222 * characters. If we only have 1, we don't have a valid device name.
223 */
224 if (strlen(tmpstr) < 2) {
225 sprintf(cam_errbuf,
226 "%s: must have both device name and unit number",
227 func_name);
228 free(newpath);
229 return(-1);
230 }
231
232 /*
233 * If the first character of the string is a digit, then the user
234 * has probably given us all numbers. Point out the error.
235 */
236 if (isdigit(*tmpstr)) {
237 sprintf(cam_errbuf,
238 "%s: device name cannot begin with a number",
239 func_name);
240 free(newpath);
241 return(-1);
242 }
243
244 /*
245 * At this point, if the last character of the string isn't a
246 * number, we know the user either didn't give us a device number,
247 * or he gave us a device name/number format we don't recognize.
248 */
249 if (!isdigit(tmpstr[strlen(tmpstr) - 1])) {
250 sprintf(cam_errbuf, "%s: unable to find device unit number",
251 func_name);
252 free(newpath);
253 return(-1);
254 }
255
256 /*
257 * Attempt to figure out where the device name ends and the unit
258 * number begins. As long as unit_offset is at least 1 less than
259 * the length of the string, we can still potentially have a device
260 * name at the front of the string. When we get to something that
261 * isn't a digit, we've hit the device name. Because of the check
262 * above, we know that this cannot happen when unit_offset == 1.
263 * Therefore it is okay to decrement unit_offset -- it won't cause
264 * us to go past the end of the character array.
265 */
266 for (unit_offset = 1;
267 (unit_offset < (strlen(tmpstr)))
268 && (isdigit(tmpstr[strlen(tmpstr) - unit_offset])); unit_offset++);
269
270 unit_offset--;
271
272 /*
273 * Grab the unit number.
274 */
275 *unit = atoi(&tmpstr[strlen(tmpstr) - unit_offset]);
276
277 /*
278 * Put a null in place of the first number of the unit number so
279 * that all we have left is the device name.
280 */
281 tmpstr[strlen(tmpstr) - unit_offset] = '\0';
282
283 /*
284 * Look through our equivalency table and see if the device name
285 * the user gave us is an old style device name. If so, translate
286 * it to the new style device name.
287 */
288 for (i = 0; i < NELEM(devmatchtable); i++) {
289 if (strcmp(tmpstr, devmatchtable[i].given_dev) == 0) {
290 strlcpy(dev_name,devmatchtable[i].real_dev, devnamelen);
291 found = 1;
292 break;
293 }
294 }
295 if (found == 0)
296 strlcpy(dev_name, tmpstr, devnamelen);
297
298 /* Clean up allocated memory */
299 free(newpath);
300
301 return(0);
302
303 }
304
305 /*
306 * Backwards compatible wrapper for the real open routine. This translates
307 * a pathname into a device name and unit number for use with the real open
308 * routine.
309 */
310 struct cam_device *
cam_open_device(const char * path,int flags)311 cam_open_device(const char *path, int flags)
312 {
313 int unit;
314 char dev_name[DEV_IDLEN + 1];
315
316 /*
317 * cam_get_device() has already put an error message in cam_errbuf,
318 * so we don't need to.
319 */
320 if (cam_get_device(path, dev_name, sizeof(dev_name), &unit) == -1)
321 return(NULL);
322
323 return(cam_lookup_pass(dev_name, unit, flags, path, NULL));
324 }
325
326 /*
327 * Open the passthrough device for a given bus, target and lun, if the
328 * passthrough device exists.
329 */
330 struct cam_device *
cam_open_btl(path_id_t path_id,target_id_t target_id,lun_id_t target_lun,int flags,struct cam_device * device)331 cam_open_btl(path_id_t path_id, target_id_t target_id, lun_id_t target_lun,
332 int flags, struct cam_device *device)
333 {
334 union ccb ccb;
335 struct periph_match_pattern *match_pat;
336 char *func_name = "cam_open_btl";
337 int fd, bufsize;
338
339 if ((fd = open(XPT_DEVICE, O_RDWR)) < 0) {
340 snprintf(cam_errbuf, CAM_ERRBUF_SIZE,
341 "%s: couldn't open %s\n%s: %s", func_name, XPT_DEVICE,
342 func_name, strerror(errno));
343 return(NULL);
344 }
345
346 bzero(&ccb, sizeof(union ccb));
347 ccb.ccb_h.func_code = XPT_DEV_MATCH;
348
349 /* Setup the result buffer */
350 bufsize = sizeof(struct dev_match_result);
351 ccb.cdm.match_buf_len = bufsize;
352 ccb.cdm.matches = (struct dev_match_result *)malloc(bufsize);
353 if (ccb.cdm.matches == NULL) {
354 snprintf(cam_errbuf, CAM_ERRBUF_SIZE,
355 "%s: couldn't malloc match buffer", func_name);
356 close(fd);
357 return(NULL);
358 }
359 ccb.cdm.num_matches = 0;
360
361 /* Setup the pattern buffer */
362 ccb.cdm.num_patterns = 1;
363 ccb.cdm.pattern_buf_len = sizeof(struct dev_match_pattern);
364 ccb.cdm.patterns = (struct dev_match_pattern *)malloc(
365 sizeof(struct dev_match_pattern));
366 if (ccb.cdm.patterns == NULL) {
367 snprintf(cam_errbuf, CAM_ERRBUF_SIZE,
368 "%s: couldn't malloc pattern buffer", func_name);
369 free(ccb.cdm.matches);
370 close(fd);
371 return(NULL);
372 }
373 ccb.cdm.patterns[0].type = DEV_MATCH_PERIPH;
374 match_pat = &ccb.cdm.patterns[0].pattern.periph_pattern;
375
376 /*
377 * We're looking for the passthrough device associated with this
378 * particular bus/target/lun.
379 */
380 sprintf(match_pat->periph_name, "pass");
381 match_pat->path_id = path_id;
382 match_pat->target_id = target_id;
383 match_pat->target_lun = target_lun;
384 /* Now set the flags to indicate what we're looking for. */
385 match_pat->flags = PERIPH_MATCH_PATH | PERIPH_MATCH_TARGET |
386 PERIPH_MATCH_LUN | PERIPH_MATCH_NAME;
387
388 if (ioctl(fd, CAMIOCOMMAND, &ccb) == -1) {
389 sprintf(cam_errbuf, "%s: CAMIOCOMMAND ioctl failed\n"
390 "%s: %s", func_name, func_name, strerror(errno));
391 goto btl_bailout;
392 }
393
394 /*
395 * Check for an outright error.
396 */
397 if ((ccb.ccb_h.status != CAM_REQ_CMP)
398 || ((ccb.cdm.status != CAM_DEV_MATCH_LAST)
399 && (ccb.cdm.status != CAM_DEV_MATCH_MORE))) {
400 sprintf(cam_errbuf, "%s: CAM error %#x, CDM error %d "
401 "returned from XPT_DEV_MATCH ccb", func_name,
402 ccb.ccb_h.status, ccb.cdm.status);
403 goto btl_bailout;
404 }
405
406 if (ccb.cdm.status == CAM_DEV_MATCH_MORE) {
407 sprintf(cam_errbuf, "%s: CDM reported more than one"
408 " passthrough device at %d:%d:%d!!\n",
409 func_name, path_id, target_id, target_lun);
410 goto btl_bailout;
411 }
412
413 if (ccb.cdm.num_matches == 0) {
414 sprintf(cam_errbuf, "%s: no passthrough device found at"
415 " %d:%d:%d", func_name, path_id, target_id,
416 target_lun);
417 goto btl_bailout;
418 }
419
420 switch(ccb.cdm.matches[0].type) {
421 case DEV_MATCH_PERIPH: {
422 int pass_unit;
423 char dev_path[256];
424 struct periph_match_result *periph_result;
425
426 periph_result = &ccb.cdm.matches[0].result.periph_result;
427 pass_unit = periph_result->unit_number;
428 free(ccb.cdm.matches);
429 free(ccb.cdm.patterns);
430 close(fd);
431 sprintf(dev_path, "/dev/pass%d", pass_unit);
432 return(cam_real_open_device(dev_path, flags, device, NULL,
433 NULL, 0));
434 break; /* NOTREACHED */
435 }
436 default:
437 sprintf(cam_errbuf, "%s: asked for a peripheral match, but"
438 " got a bus or device match", func_name);
439 goto btl_bailout;
440 break; /* NOTREACHED */
441 }
442
443 btl_bailout:
444 free(ccb.cdm.matches);
445 free(ccb.cdm.patterns);
446 close(fd);
447 return(NULL);
448 }
449
450 struct cam_device *
cam_open_spec_device(const char * dev_name,int unit,int flags,struct cam_device * device)451 cam_open_spec_device(const char *dev_name, int unit, int flags,
452 struct cam_device *device)
453 {
454 return(cam_lookup_pass(dev_name, unit, flags, NULL, device));
455 }
456
457 struct cam_device *
cam_open_pass(const char * path,int flags,struct cam_device * device)458 cam_open_pass(const char *path, int flags, struct cam_device *device)
459 {
460 return(cam_real_open_device(path, flags, device, path, NULL, 0));
461 }
462
463 static struct cam_device *
cam_lookup_pass(const char * dev_name,int unit,int flags,const char * given_path,struct cam_device * device)464 cam_lookup_pass(const char *dev_name, int unit, int flags,
465 const char *given_path, struct cam_device *device)
466 {
467 int fd;
468 union ccb ccb;
469 char dev_path[256];
470 char *func_name = "cam_lookup_pass";
471
472 /*
473 * The flags argument above only applies to the actual passthrough
474 * device open, not our open of the given device to find the
475 * passthrough device.
476 */
477 if ((fd = open(XPT_DEVICE, O_RDWR)) < 0) {
478 snprintf(cam_errbuf, CAM_ERRBUF_SIZE,
479 "%s: couldn't open %s\n%s: %s", func_name, XPT_DEVICE,
480 func_name, strerror(errno));
481 return(NULL);
482 }
483
484 /* This isn't strictly necessary for the GETPASSTHRU ioctl. */
485 ccb.ccb_h.func_code = XPT_GDEVLIST;
486
487 /* These two are necessary for the GETPASSTHRU ioctl to work. */
488 strlcpy(ccb.cgdl.periph_name, dev_name, sizeof(ccb.cgdl.periph_name));
489 ccb.cgdl.unit_number = unit;
490
491 /*
492 * Attempt to get the passthrough device. This ioctl will fail if
493 * the device name is null, if the device doesn't exist, or if the
494 * passthrough driver isn't in the kernel.
495 */
496 if (ioctl(fd, CAMGETPASSTHRU, &ccb) == -1) {
497 char tmpstr[256];
498
499 /*
500 * If we get ENOENT from the transport layer version of
501 * the CAMGETPASSTHRU ioctl, it means one of two things:
502 * either the device name/unit number passed in doesn't
503 * exist, or the passthrough driver isn't in the kernel.
504 */
505 if (errno == ENOENT) {
506 snprintf(tmpstr, sizeof(tmpstr),
507 "\n%s: either the pass driver isn't in "
508 "your kernel\n%s: or %s%d doesn't exist",
509 func_name, func_name, dev_name, unit);
510 }
511 snprintf(cam_errbuf, sizeof(cam_errbuf),
512 "%s: CAMGETPASSTHRU ioctl failed\n"
513 "%s: %s%s", func_name, func_name, strerror(errno),
514 (errno == ENOENT) ? tmpstr : "");
515
516 close(fd);
517 return(NULL);
518 }
519
520 close(fd);
521
522 /*
523 * If the ioctl returned the right status, but we got an error back
524 * in the ccb, that means that the kernel found the device the user
525 * passed in, but was unable to find the passthrough device for
526 * the device the user gave us.
527 */
528 if (ccb.cgdl.status == CAM_GDEVLIST_ERROR) {
529 sprintf(cam_errbuf, "%s: device %s%d does not exist!",
530 func_name, dev_name, unit);
531 return(NULL);
532 }
533
534 sprintf(dev_path, "/dev/%s%d", ccb.cgdl.periph_name,
535 ccb.cgdl.unit_number);
536
537 return(cam_real_open_device(dev_path, flags, device, NULL,
538 dev_name, unit));
539 }
540
541 /*
542 * Open a given device. The path argument isn't strictly necessary, but it
543 * is copied into the cam_device structure as a convenience to the user.
544 */
545 static struct cam_device *
cam_real_open_device(const char * path,int flags,struct cam_device * device,const char * given_path,const char * given_dev_name,int given_unit_number)546 cam_real_open_device(const char *path, int flags, struct cam_device *device,
547 const char *given_path, const char *given_dev_name,
548 int given_unit_number)
549 {
550 char *func_name = "cam_real_open_device";
551 union ccb ccb;
552 int fd = -1, malloced_device = 0;
553
554 /*
555 * See if the user wants us to malloc a device for him.
556 */
557 if (device == NULL) {
558 if ((device = (struct cam_device *)malloc(
559 sizeof(struct cam_device))) == NULL) {
560 sprintf(cam_errbuf, "%s: device structure malloc"
561 " failed\n%s: %s", func_name, func_name,
562 strerror(errno));
563 return(NULL);
564 }
565 device->fd = -1;
566 malloced_device = 1;
567 }
568
569 /*
570 * If the user passed in a path, save it for him.
571 */
572 if (given_path != NULL)
573 strlcpy(device->device_path, given_path,
574 sizeof(device->device_path));
575 else
576 device->device_path[0] = '\0';
577
578 /*
579 * If the user passed in a device name and unit number pair, save
580 * those as well.
581 */
582 if (given_dev_name != NULL)
583 strlcpy(device->given_dev_name, given_dev_name,
584 sizeof(device->given_dev_name));
585 else
586 device->given_dev_name[0] = '\0';
587 device->given_unit_number = given_unit_number;
588
589 if ((fd = open(path, flags)) < 0) {
590 snprintf(cam_errbuf, CAM_ERRBUF_SIZE,
591 "%s: couldn't open passthrough device %s\n"
592 "%s: %s", func_name, path, func_name,
593 strerror(errno));
594 goto crod_bailout;
595 }
596
597 device->fd = fd;
598
599 bzero(&ccb, sizeof(union ccb));
600
601 /*
602 * Unlike the transport layer version of the GETPASSTHRU ioctl,
603 * we don't have to set any fields.
604 */
605 ccb.ccb_h.func_code = XPT_GDEVLIST;
606
607 /*
608 * We're only doing this to get some information on the device in
609 * question. Otherwise, we'd have to pass in yet another
610 * parameter: the passthrough driver unit number.
611 */
612 if (ioctl(fd, CAMGETPASSTHRU, &ccb) == -1) {
613 /*
614 * At this point we know the passthrough device must exist
615 * because we just opened it above. The only way this
616 * ioctl can fail is if the ccb size is wrong.
617 */
618 sprintf(cam_errbuf, "%s: CAMGETPASSTHRU ioctl failed\n"
619 "%s: %s", func_name, func_name, strerror(errno));
620 goto crod_bailout;
621 }
622
623 /*
624 * If the ioctl returned the right status, but we got an error back
625 * in the ccb, that means that the kernel found the device the user
626 * passed in, but was unable to find the passthrough device for
627 * the device the user gave us.
628 */
629 if (ccb.cgdl.status == CAM_GDEVLIST_ERROR) {
630 sprintf(cam_errbuf, "%s: passthrough device does not exist!",
631 func_name);
632 goto crod_bailout;
633 }
634
635 device->dev_unit_num = ccb.cgdl.unit_number;
636 strlcpy(device->device_name, ccb.cgdl.periph_name,
637 sizeof(device->device_name));
638 device->path_id = ccb.ccb_h.path_id;
639 device->target_id = ccb.ccb_h.target_id;
640 device->target_lun = ccb.ccb_h.target_lun;
641
642 ccb.ccb_h.func_code = XPT_PATH_INQ;
643 if (ioctl(fd, CAMIOCOMMAND, &ccb) == -1) {
644 sprintf(cam_errbuf, "%s: Path Inquiry CCB failed\n"
645 "%s: %s", func_name, func_name, strerror(errno));
646 goto crod_bailout;
647 }
648 strlcpy(device->sim_name, ccb.cpi.dev_name, sizeof(device->sim_name));
649 device->sim_unit_number = ccb.cpi.unit_number;
650 device->bus_id = ccb.cpi.bus_id;
651
652 /*
653 * It doesn't really matter what is in the payload for a getdev
654 * CCB, the kernel doesn't look at it.
655 */
656 ccb.ccb_h.func_code = XPT_GDEV_TYPE;
657 if (ioctl(fd, CAMIOCOMMAND, &ccb) == -1) {
658 sprintf(cam_errbuf, "%s: Get Device Type CCB failed\n"
659 "%s: %s", func_name, func_name, strerror(errno));
660 goto crod_bailout;
661 }
662 device->pd_type = SID_TYPE(&ccb.cgd.inq_data);
663 bcopy(&ccb.cgd.inq_data, &device->inq_data,
664 sizeof(struct scsi_inquiry_data));
665 device->serial_num_len = ccb.cgd.serial_num_len;
666 bcopy(&ccb.cgd.serial_num, &device->serial_num, device->serial_num_len);
667
668 /*
669 * Zero the payload, the kernel does look at the flags.
670 */
671 bzero(&(&ccb.ccb_h)[1], sizeof(struct ccb_trans_settings));
672
673 /*
674 * Get transfer settings for this device.
675 */
676 ccb.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
677
678 ccb.cts.type = CTS_TYPE_CURRENT_SETTINGS;
679
680 if (ioctl(fd, CAMIOCOMMAND, &ccb) == -1) {
681 sprintf(cam_errbuf, "%s: Get Transfer Settings CCB failed\n"
682 "%s: %s", func_name, func_name, strerror(errno));
683 goto crod_bailout;
684 }
685 if (ccb.cts.transport == XPORT_SPI) {
686 struct ccb_trans_settings_spi *spi =
687 &ccb.cts.xport_specific.spi;
688 device->sync_period = spi->sync_period;
689 device->sync_offset = spi->sync_offset;
690 device->bus_width = spi->bus_width;
691 } else {
692 device->sync_period = 0;
693 device->sync_offset = 0;
694 device->bus_width = 0;
695 }
696
697 return(device);
698
699 crod_bailout:
700
701 if (fd >= 0)
702 close(fd);
703
704 if (malloced_device)
705 free(device);
706
707 return(NULL);
708 }
709
710 void
cam_close_device(struct cam_device * dev)711 cam_close_device(struct cam_device *dev)
712 {
713 if (dev == NULL)
714 return;
715
716 cam_close_spec_device(dev);
717
718 free(dev);
719 }
720
721 void
cam_close_spec_device(struct cam_device * dev)722 cam_close_spec_device(struct cam_device *dev)
723 {
724 if (dev == NULL)
725 return;
726
727 if (dev->fd >= 0)
728 close(dev->fd);
729 }
730
731 char *
cam_path_string(struct cam_device * dev,char * str,int len)732 cam_path_string(struct cam_device *dev, char *str, int len)
733 {
734 if (dev == NULL) {
735 snprintf(str, len, "No path");
736 return(str);
737 }
738
739 snprintf(str, len, "(%s%d:%s%d:%d:%d:%d): ",
740 (dev->device_name[0] != '\0') ? dev->device_name : "pass",
741 dev->dev_unit_num,
742 (dev->sim_name[0] != '\0') ? dev->sim_name : "unknown",
743 dev->sim_unit_number,
744 dev->bus_id,
745 dev->target_id,
746 dev->target_lun);
747
748 return(str);
749 }
750
751 /*
752 * Malloc/duplicate a CAM device structure.
753 */
754 struct cam_device *
cam_device_dup(struct cam_device * device)755 cam_device_dup(struct cam_device *device)
756 {
757 char *func_name = "cam_device_dup";
758 struct cam_device *newdev;
759
760 if (device == NULL) {
761 sprintf(cam_errbuf, "%s: device is NULL", func_name);
762 return(NULL);
763 }
764
765 newdev = malloc(sizeof(struct cam_device));
766 if (newdev == NULL) {
767 snprintf(cam_errbuf, CAM_ERRBUF_SIZE,
768 "%s: couldn't malloc CAM device structure", func_name);
769 return(NULL);
770 }
771
772 bcopy(device, newdev, sizeof(struct cam_device));
773
774 return(newdev);
775 }
776
777 /*
778 * Copy a CAM device structure.
779 */
780 void
cam_device_copy(struct cam_device * src,struct cam_device * dst)781 cam_device_copy(struct cam_device *src, struct cam_device *dst)
782 {
783 char *func_name = "cam_device_copy";
784
785 if (src == NULL) {
786 sprintf(cam_errbuf, "%s: source device struct was NULL",
787 func_name);
788 return;
789 }
790
791 if (dst == NULL) {
792 sprintf(cam_errbuf, "%s: destination device struct was NULL",
793 func_name);
794 return;
795 }
796
797 bcopy(src, dst, sizeof(struct cam_device));
798
799 }
800