4 * Code related to requesting and getting an id from a scsi device
6 * Copyright (C) IBM Corp. 2003
9 * Patrick Mansfield<patmans@us.ibm.com>
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation version 2 of the License.
16 #include <sys/types.h>
17 #include <sys/ioctl.h>
27 #include "../../udev.h"
30 #include "scsi_id_version.h"
33 * A priority based list of id, naa, and binary/ascii for the identifier
34 * descriptor in VPD page 0x83.
36 * Brute force search for a match starting with the first value in the
37 * following id_search_list. This is not a performance issue, since there
38 * is normally one or some small number of descriptors.
40 static const struct scsi_id_search_values id_search_list[] = {
41 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG_EXTENDED, SCSI_ID_BINARY },
42 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG_EXTENDED, SCSI_ID_ASCII },
43 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG, SCSI_ID_BINARY },
44 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG, SCSI_ID_ASCII },
46 * Devices already exist using NAA values that are now marked
47 * reserved. These should not conflict with other values, or it is
48 * a bug in the device. As long as we find the IEEE extended one
49 * first, we really don't care what other ones are used. Using
50 * don't care here means that a device that returns multiple
51 * non-IEEE descriptors in a random order will get different
54 { SCSI_ID_NAA, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
55 { SCSI_ID_NAA, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
56 { SCSI_ID_EUI_64, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
57 { SCSI_ID_EUI_64, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
58 { SCSI_ID_T10_VENDOR, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
59 { SCSI_ID_T10_VENDOR, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
60 { SCSI_ID_VENDOR_SPECIFIC, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
61 { SCSI_ID_VENDOR_SPECIFIC, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
64 static const char hex_str[]="0123456789abcdef";
67 * Values returned in the result/status, only the ones used by the code
71 #define DID_NO_CONNECT 0x01 /* Unable to connect before timeout */
72 #define DID_BUS_BUSY 0x02 /* Bus remain busy until timeout */
73 #define DID_TIME_OUT 0x03 /* Timed out for some other reason */
74 #define DRIVER_TIMEOUT 0x06
75 #define DRIVER_SENSE 0x08 /* Sense_buffer has been set */
77 /* The following "category" function returns one of the following */
78 #define SG_ERR_CAT_CLEAN 0 /* No errors or other information */
79 #define SG_ERR_CAT_MEDIA_CHANGED 1 /* interpreted from sense buffer */
80 #define SG_ERR_CAT_RESET 2 /* interpreted from sense buffer */
81 #define SG_ERR_CAT_TIMEOUT 3
82 #define SG_ERR_CAT_RECOVERED 4 /* Successful command after recovered err */
83 #define SG_ERR_CAT_NOTSUPPORTED 5 /* Illegal / unsupported command */
84 #define SG_ERR_CAT_SENSE 98 /* Something else in the sense buffer */
85 #define SG_ERR_CAT_OTHER 99 /* Some other error/warning */
87 static int sg_err_category_new(int scsi_status, int msg_status, int
88 host_status, int driver_status, const
89 unsigned char *sense_buffer, int sb_len)
94 * XXX change to return only two values - failed or OK.
100 if (!scsi_status && !msg_status && !host_status && !driver_status)
101 return SG_ERR_CAT_CLEAN;
103 if ((scsi_status == SCSI_CHECK_CONDITION) ||
104 (scsi_status == SCSI_COMMAND_TERMINATED) ||
105 ((driver_status & 0xf) == DRIVER_SENSE)) {
106 if (sense_buffer && (sb_len > 2)) {
110 if (sense_buffer[0] & 0x2) {
111 sense_key = sense_buffer[1] & 0xf;
112 asc = sense_buffer[2];
114 sense_key = sense_buffer[2] & 0xf;
115 asc = (sb_len > 12) ? sense_buffer[12] : 0;
118 if (sense_key == RECOVERED_ERROR)
119 return SG_ERR_CAT_RECOVERED;
120 else if (sense_key == UNIT_ATTENTION) {
122 return SG_ERR_CAT_MEDIA_CHANGED;
124 return SG_ERR_CAT_RESET;
125 } else if (sense_key == ILLEGAL_REQUEST) {
126 return SG_ERR_CAT_NOTSUPPORTED;
129 return SG_ERR_CAT_SENSE;
132 if ((host_status == DID_NO_CONNECT) ||
133 (host_status == DID_BUS_BUSY) ||
134 (host_status == DID_TIME_OUT))
135 return SG_ERR_CAT_TIMEOUT;
137 if (!driver_status) {
138 if (driver_status == DRIVER_TIMEOUT)
139 return SG_ERR_CAT_TIMEOUT;
141 return SG_ERR_CAT_OTHER;
144 static int sg_err_category3(struct sg_io_hdr *hp)
146 return sg_err_category_new(hp->status, hp->msg_status,
147 hp->host_status, hp->driver_status,
148 hp->sbp, hp->sb_len_wr);
151 static int scsi_dump_sense(struct scsi_id_device *dev_scsi, struct sg_io_hdr *io)
153 unsigned char *sense_buffer;
159 int descriptor_format;
162 char out_buffer[256];
167 * Figure out and print the sense key, asc and ascq.
169 * If you want to suppress these for a particular drive model, add
170 * a black list entry in the scsi_id config file.
172 * XXX We probably need to: lookup the sense/asc/ascq in a retry
173 * table, and if found return 1 (after dumping the sense, asc, and
174 * ascq). So, if/when we get something like a power on/reset,
175 * we'll retry the command.
178 dbg("got check condition\n");
180 sb_len = io->sb_len_wr;
182 info("%s: sense buffer empty\n", dev_scsi->kernel);
186 sense_buffer = io->sbp;
187 sense_class = (sense_buffer[0] >> 4) & 0x07;
188 code = sense_buffer[0] & 0xf;
190 if (sense_class == 7) {
192 * extended sense data.
194 s = sense_buffer[7] + 8;
196 info("%s: sense buffer too small %d bytes, %d bytes too short\n",
197 dev_scsi->kernel, sb_len, s - sb_len);
200 if ((code == 0x0) || (code == 0x1)) {
201 descriptor_format = 0;
202 sense_key = sense_buffer[2] & 0xf;
207 info("%s: sense result too" " small %d bytes\n",
208 dev_scsi->kernel, s);
211 asc = sense_buffer[12];
212 ascq = sense_buffer[13];
213 } else if ((code == 0x2) || (code == 0x3)) {
214 descriptor_format = 1;
215 sense_key = sense_buffer[1] & 0xf;
216 asc = sense_buffer[2];
217 ascq = sense_buffer[3];
219 info("%s: invalid sense code 0x%x\n",
220 dev_scsi->kernel, code);
223 info("%s: sense key 0x%x ASC 0x%x ASCQ 0x%x\n",
224 dev_scsi->kernel, sense_key, asc, ascq);
227 info("%s: sense buffer too small %d bytes, %d bytes too short\n",
228 dev_scsi->kernel, sb_len, 4 - sb_len);
232 if (sense_buffer[0] < 15)
233 info("%s: old sense key: 0x%x\n", dev_scsi->kernel, sense_buffer[0] & 0x0f);
235 info("%s: sense = %2x %2x\n",
236 dev_scsi->kernel, sense_buffer[0], sense_buffer[2]);
237 info("%s: non-extended sense class %d code 0x%0x\n",
238 dev_scsi->kernel, sense_class, code);
243 for (i = 0, j = 0; (i < s) && (j < 254); i++) {
244 dbg("i %d, j %d\n", i, j);
245 out_buffer[j++] = hex_str[(sense_buffer[i] & 0xf0) >> 4];
246 out_buffer[j++] = hex_str[sense_buffer[i] & 0x0f];
247 out_buffer[j++] = ' ';
249 out_buffer[j] = '\0';
250 info("%s: sense dump:\n", dev_scsi->kernel);
251 info("%s: %s\n", dev_scsi->kernel, out_buffer);
257 static int scsi_dump(struct scsi_id_device *dev_scsi, struct sg_io_hdr *io)
259 if (!io->status && !io->host_status && !io->msg_status &&
260 !io->driver_status) {
262 * Impossible, should not be called.
264 info("%s: called with no error\n", __FUNCTION__);
268 info("%s: sg_io failed status 0x%x 0x%x 0x%x 0x%x\n",
269 dev_scsi->kernel, io->driver_status, io->host_status, io->msg_status, io->status);
270 if (io->status == SCSI_CHECK_CONDITION)
271 return scsi_dump_sense(dev_scsi, io);
276 static int scsi_inquiry(struct scsi_id_device *dev_scsi, int fd,
277 unsigned char evpd, unsigned char page,
278 unsigned char *buf, unsigned int buflen)
280 unsigned char inq_cmd[INQUIRY_CMDLEN] =
281 { INQUIRY_CMD, evpd, page, 0, buflen, 0 };
282 unsigned char sense[SENSE_BUFF_LEN];
283 struct sg_io_hdr io_hdr;
285 int retry = 3; /* rather random */
287 if (buflen > SCSI_INQ_BUFF_LEN) {
288 info("buflen %d too long\n", buflen);
293 dbg("%s evpd %d, page 0x%x\n", dev_scsi->kernel, evpd, page);
295 memset(&io_hdr, 0, sizeof(struct sg_io_hdr));
296 io_hdr.interface_id = 'S';
297 io_hdr.cmd_len = sizeof(inq_cmd);
298 io_hdr.mx_sb_len = sizeof(sense);
299 io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
300 io_hdr.dxfer_len = buflen;
302 io_hdr.cmdp = inq_cmd;
304 io_hdr.timeout = DEF_TIMEOUT;
306 if (ioctl(fd, SG_IO, &io_hdr) < 0) {
307 info("%s: ioctl failed: %s\n", dev_scsi->kernel, strerror(errno));
312 retval = sg_err_category3(&io_hdr);
315 case SG_ERR_CAT_NOTSUPPORTED:
318 case SG_ERR_CAT_CLEAN:
319 case SG_ERR_CAT_RECOVERED:
324 retval = scsi_dump(dev_scsi, &io_hdr);
329 } else if (retval > 0) {
331 dbg("%s: Retrying ...\n", dev_scsi->kernel);
339 info("%s: Unable to get INQUIRY vpd %d page 0x%x.\n",
340 dev_scsi->kernel, evpd, page);
345 /* Get list of supported EVPD pages */
346 static int do_scsi_page0_inquiry(struct scsi_id_device *dev_scsi, int fd,
347 unsigned char *buffer, unsigned int len)
351 memset(buffer, 0, len);
352 retval = scsi_inquiry(dev_scsi, fd, 1, 0x0, buffer, len);
356 if (buffer[1] != 0) {
357 info("%s: page 0 not available.\n", dev_scsi->kernel);
360 if (buffer[3] > len) {
361 info("%s: page 0 buffer too long %d\n", dev_scsi->kernel, buffer[3]);
366 * Following check is based on code once included in the 2.5.x
369 * Some ill behaved devices return the standard inquiry here
370 * rather than the evpd data, snoop the data to verify.
372 if (buffer[3] > MODEL_LENGTH) {
374 * If the vendor id appears in the page assume the page is
377 if (!strncmp((char *)&buffer[VENDOR_LENGTH], dev_scsi->vendor, VENDOR_LENGTH)) {
378 info("%s: invalid page0 data\n", dev_scsi->kernel);
386 * The caller checks that serial is long enough to include the vendor +
389 static int prepend_vendor_model(struct scsi_id_device *dev_scsi, char *serial)
393 strncpy(serial, dev_scsi->vendor, VENDOR_LENGTH);
394 ind = strlen(serial) - 1;
396 strncat(serial, dev_scsi->model, MODEL_LENGTH);
397 ind = strlen(serial) - 1;
401 * This is not a complete check, since we are using strncat/cpy
402 * above, ind will never be too large.
404 if (ind != (VENDOR_LENGTH + MODEL_LENGTH)) {
405 info("%s: expected length %d, got length %d\n",
406 dev_scsi->kernel, (VENDOR_LENGTH + MODEL_LENGTH), ind);
413 * check_fill_0x83_id - check the page 0x83 id, if OK allocate and fill
416 static int check_fill_0x83_id(struct scsi_id_device *dev_scsi,
417 unsigned char *page_83,
418 const struct scsi_id_search_values
419 *id_search, char *serial, char *serial_short, int max_len)
424 * ASSOCIATION must be with the device (value 0)
426 if ((page_83[1] & 0x30) != 0)
429 if ((page_83[1] & 0x0f) != id_search->id_type)
433 * Possibly check NAA sub-type.
435 if ((id_search->naa_type != SCSI_ID_NAA_DONT_CARE) &&
436 (id_search->naa_type != (page_83[4] & 0xf0) >> 4))
440 * Check for matching code set - ASCII or BINARY.
442 if ((page_83[0] & 0x0f) != id_search->code_set)
446 * page_83[3]: identifier length
449 if ((page_83[0] & 0x0f) != SCSI_ID_ASCII)
451 * If not ASCII, use two bytes for each binary value.
456 * Add one byte for the NUL termination, and one for the id_type.
459 if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC)
460 len += VENDOR_LENGTH + MODEL_LENGTH;
463 info("%s: length %d too short - need %d\n",
464 dev_scsi->kernel, max_len, len);
468 serial[0] = hex_str[id_search->id_type];
471 * For SCSI_ID_VENDOR_SPECIFIC prepend the vendor and model before
472 * the id since it is not unique across all vendors and models,
473 * this differs from SCSI_ID_T10_VENDOR, where the vendor is
474 * included in the identifier.
476 if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC)
477 if (prepend_vendor_model(dev_scsi, &serial[1]) < 0) {
478 dbg("prepend failed\n");
482 i = 4; /* offset to the start of the identifier */
483 s = j = strlen(serial);
484 if ((page_83[0] & 0x0f) == SCSI_ID_ASCII) {
488 while (i < (4 + page_83[3]))
489 serial[j++] = page_83[i++];
492 * Binary descriptor, convert to ASCII, using two bytes of
493 * ASCII for each byte in the page_83.
495 while (i < (4 + page_83[3])) {
496 serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4];
497 serial[j++] = hex_str[page_83[i] & 0x0f];
502 strcpy(serial_short, &serial[s]);
506 /* Extract the raw binary from VPD 0x83 pre-SPC devices */
507 static int check_fill_0x83_prespc3(struct scsi_id_device *dev_scsi,
508 unsigned char *page_83,
509 const struct scsi_id_search_values
510 *id_search, char *serial, char *serial_short, int max_len)
514 dbg("using pre-spc3-83 for %s\n", dev_scsi->kernel);
515 serial[0] = hex_str[id_search->id_type];
516 /* serial has been memset to zero before */
517 j = strlen(serial); /* j = 1; */
519 for (i = 0; i < page_83[3]; ++i) {
520 serial[j++] = hex_str[(page_83[4+i] & 0xf0) >> 4];
521 serial[j++] = hex_str[ page_83[4+i] & 0x0f];
523 strcpy(serial_short, serial);
528 /* Get device identification VPD page */
529 static int do_scsi_page83_inquiry(struct scsi_id_device *dev_scsi, int fd,
530 char *serial, char *serial_short, int len)
533 unsigned int id_ind, j;
534 unsigned char page_83[SCSI_INQ_BUFF_LEN];
536 memset(page_83, 0, SCSI_INQ_BUFF_LEN);
537 retval = scsi_inquiry(dev_scsi, fd, 1, PAGE_83, page_83,
542 if (page_83[1] != PAGE_83) {
543 info("%s: Invalid page 0x83\n", dev_scsi->kernel);
548 * XXX Some devices (IBM 3542) return all spaces for an identifier if
549 * the LUN is not actually configured. This leads to identifers of
554 * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
555 * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
557 * The SCSI-2 page 83 format returns an IEEE WWN in binary
558 * encoded hexi-decimal in the 16 bytes following the initial
559 * 4-byte page 83 reply header.
561 * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
562 * of an Identification descriptor. The 3rd byte of the first
563 * Identification descriptor is a reserved (BSZ) byte field.
565 * Reference the 7th byte of the page 83 reply to determine
566 * whether the reply is compliant with SCSI-2 or SPC-2/3
567 * specifications. A zero value in the 7th byte indicates
568 * an SPC-2/3 conformant reply, (i.e., the reserved field of the
569 * first Identification descriptor). This byte will be non-zero
570 * for a SCSI-2 conformant page 83 reply from these EMC
571 * Symmetrix models since the 7th byte of the reply corresponds
572 * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
577 return check_fill_0x83_prespc3(dev_scsi, page_83, id_search_list,
578 serial, serial_short, len);
581 * Search for a match in the prioritized id_search_list.
584 id_ind < sizeof(id_search_list)/sizeof(id_search_list[0]);
587 * Examine each descriptor returned. There is normally only
588 * one or a small number of descriptors.
590 for (j = 4; j <= (unsigned int)page_83[3] + 3; j += page_83[j + 3] + 4) {
591 retval = check_fill_0x83_id(dev_scsi, &page_83[j],
592 &id_search_list[id_ind],
593 serial, serial_short, len);
594 dbg("%s id desc %d/%d/%d\n", dev_scsi->kernel,
595 id_search_list[id_ind].id_type,
596 id_search_list[id_ind].naa_type,
597 id_search_list[id_ind].code_set);
601 } else if (retval < 0) {
613 * Get device identification VPD page for older SCSI-2 device which is not
614 * compliant with either SPC-2 or SPC-3 format.
616 * Return the hard coded error code value 2 if the page 83 reply is not
617 * conformant to the SCSI-2 format.
619 static int do_scsi_page83_prespc3_inquiry(struct scsi_id_device *dev_scsi, int fd,
620 char *serial, char *serial_short, int len)
624 unsigned char page_83[SCSI_INQ_BUFF_LEN];
626 memset(page_83, 0, SCSI_INQ_BUFF_LEN);
627 retval = scsi_inquiry(dev_scsi, fd, 1, PAGE_83, page_83, SCSI_INQ_BUFF_LEN);
631 if (page_83[1] != PAGE_83) {
632 info("%s: Invalid page 0x83\n", dev_scsi->kernel);
636 * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
637 * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
639 * The SCSI-2 page 83 format returns an IEEE WWN in binary
640 * encoded hexi-decimal in the 16 bytes following the initial
641 * 4-byte page 83 reply header.
643 * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
644 * of an Identification descriptor. The 3rd byte of the first
645 * Identification descriptor is a reserved (BSZ) byte field.
647 * Reference the 7th byte of the page 83 reply to determine
648 * whether the reply is compliant with SCSI-2 or SPC-2/3
649 * specifications. A zero value in the 7th byte indicates
650 * an SPC-2/3 conformant reply, (i.e., the reserved field of the
651 * first Identification descriptor). This byte will be non-zero
652 * for a SCSI-2 conformant page 83 reply from these EMC
653 * Symmetrix models since the 7th byte of the reply corresponds
654 * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
660 serial[0] = hex_str[id_search_list[0].id_type];
662 * The first four bytes contain data, not a descriptor.
667 * Binary descriptor, convert to ASCII,
668 * using two bytes of ASCII for each byte
671 while (i < (page_83[3]+4)) {
672 serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4];
673 serial[j++] = hex_str[page_83[i] & 0x0f];
676 dbg("using pre-spc3-83 for %s\n", dev_scsi->kernel);
680 /* Get unit serial number VPD page */
681 static int do_scsi_page80_inquiry(struct scsi_id_device *dev_scsi, int fd,
682 char *serial, char *serial_short, int max_len)
688 unsigned char buf[SCSI_INQ_BUFF_LEN];
690 memset(buf, 0, SCSI_INQ_BUFF_LEN);
691 retval = scsi_inquiry(dev_scsi, fd, 1, PAGE_80, buf, SCSI_INQ_BUFF_LEN);
695 if (buf[1] != PAGE_80) {
696 info("%s: Invalid page 0x80\n", dev_scsi->kernel);
700 len = 1 + VENDOR_LENGTH + MODEL_LENGTH + buf[3];
702 info("%s: length %d too short - need %d\n",
703 dev_scsi->kernel, max_len, len);
707 * Prepend 'S' to avoid unlikely collision with page 0x83 vendor
708 * specific type where we prepend '0' + vendor + model.
711 ser_ind = prepend_vendor_model(dev_scsi, &serial[1]);
715 for (i = 4; i < len + 4; i++, ser_ind++)
716 serial[ser_ind] = buf[i];
717 memcpy(serial_short, &buf[4], len);
718 serial_short[len] = '\0';
722 int scsi_std_inquiry(struct scsi_id_device *dev_scsi, const char *devname)
726 unsigned char buf[SCSI_INQ_BUFF_LEN];
729 dbg("opening %s\n", devname);
730 fd = open(devname, O_RDONLY | O_NONBLOCK);
732 info("scsi_id: cannot open %s: %s\n",
733 devname, strerror(errno));
737 if (fstat(fd, &statbuf) < 0) {
738 info("scsi_id: cannot stat %s: %s\n",
739 devname, strerror(errno));
742 sprintf(dev_scsi->kernel,"%d:%d", major(statbuf.st_rdev),
743 minor(statbuf.st_rdev));
745 memset(buf, 0, SCSI_INQ_BUFF_LEN);
746 retval = scsi_inquiry(dev_scsi, fd, 0, 0, buf, SCSI_INQ_BUFF_LEN);
750 memcpy(dev_scsi->vendor, buf + 8, 8);
751 memcpy(dev_scsi->model, buf + 16, 16);
752 memcpy(dev_scsi->revision, buf + 32, 4);
753 sprintf(dev_scsi->type,"%x", buf[0] & 0x1f);
756 info("%s: close failed: %s\n", dev_scsi->kernel, strerror(errno));
761 int scsi_get_serial (struct scsi_id_device *dev_scsi, const char *devname,
762 int page_code, char *serial_short, int len)
764 unsigned char page0[SCSI_INQ_BUFF_LEN];
769 memset(dev_scsi->serial, 0, len);
770 dbg("opening %s\n", devname);
771 fd = open(devname, O_RDONLY | O_NONBLOCK);
773 info("%s: cannot open %s: %s\n",
774 dev_scsi->kernel, devname, strerror(errno));
778 if (page_code == PAGE_80) {
779 if (do_scsi_page80_inquiry(dev_scsi, fd, dev_scsi->serial, serial_short, len)) {
786 } else if (page_code == PAGE_83) {
787 if (do_scsi_page83_inquiry(dev_scsi, fd, dev_scsi->serial, serial_short, len)) {
794 } else if (page_code == PAGE_83_PRE_SPC3) {
795 retval = do_scsi_page83_prespc3_inquiry(dev_scsi, fd, dev_scsi->serial, serial_short, len);
798 * Fallback to servicing a SPC-2/3 compliant page 83
799 * inquiry if the page 83 reply format does not
800 * conform to pre-SPC3 expectations.
803 if (do_scsi_page83_inquiry(dev_scsi, fd, dev_scsi->serial, serial_short, len)) {
819 } else if (page_code != 0x00) {
820 info("%s: unsupported page code 0x%d\n", dev_scsi->kernel, page_code);
825 * Get page 0, the page of the pages. By default, try from best to
826 * worst of supported pages: 0x83 then 0x80.
828 if (do_scsi_page0_inquiry(dev_scsi, fd, page0, SCSI_INQ_BUFF_LEN)) {
830 * Don't try anything else. Black list if a specific page
831 * should be used for this vendor+model, or maybe have an
832 * optional fall-back to page 0x80 or page 0x83.
838 dbg("%s: Checking page0\n", dev_scsi->kernel);
840 for (ind = 4; ind <= page0[3] + 3; ind++)
841 if (page0[ind] == PAGE_83)
842 if (!do_scsi_page83_inquiry(dev_scsi, fd,
843 dev_scsi->serial, serial_short, len)) {
851 for (ind = 4; ind <= page0[3] + 3; ind++)
852 if (page0[ind] == PAGE_80)
853 if (!do_scsi_page80_inquiry(dev_scsi, fd,
854 dev_scsi->serial, serial_short, len)) {
864 info("%s: close failed: %s\n", dev_scsi->kernel, strerror(errno));