2 * Copyright (C) IBM Corp. 2003
4 * Author: Patrick Mansfield<patmans@us.ibm.com>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 #include <sys/types.h>
21 #include <sys/ioctl.h>
31 #include <scsi/scsi.h>
33 #include <linux/types.h>
34 #include <linux/bsg.h>
37 #include "libudev-private.h"
42 * A priority based list of id, naa, and binary/ascii for the identifier
43 * descriptor in VPD page 0x83.
45 * Brute force search for a match starting with the first value in the
46 * following id_search_list. This is not a performance issue, since there
47 * is normally one or some small number of descriptors.
49 static const struct scsi_id_search_values id_search_list[] = {
50 { SCSI_ID_TGTGROUP, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
51 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG_EXTENDED, SCSI_ID_BINARY },
52 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG_EXTENDED, SCSI_ID_ASCII },
53 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG, SCSI_ID_BINARY },
54 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG, SCSI_ID_ASCII },
56 * Devices already exist using NAA values that are now marked
57 * reserved. These should not conflict with other values, or it is
58 * a bug in the device. As long as we find the IEEE extended one
59 * first, we really don't care what other ones are used. Using
60 * don't care here means that a device that returns multiple
61 * non-IEEE descriptors in a random order will get different
64 { SCSI_ID_NAA, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
65 { SCSI_ID_NAA, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
66 { SCSI_ID_EUI_64, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
67 { SCSI_ID_EUI_64, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
68 { SCSI_ID_T10_VENDOR, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
69 { SCSI_ID_T10_VENDOR, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
70 { SCSI_ID_VENDOR_SPECIFIC, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
71 { SCSI_ID_VENDOR_SPECIFIC, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
74 static const char hex_str[]="0123456789abcdef";
77 * Values returned in the result/status, only the ones used by the code
81 #define DID_NO_CONNECT 0x01 /* Unable to connect before timeout */
82 #define DID_BUS_BUSY 0x02 /* Bus remain busy until timeout */
83 #define DID_TIME_OUT 0x03 /* Timed out for some other reason */
84 #define DRIVER_TIMEOUT 0x06
85 #define DRIVER_SENSE 0x08 /* Sense_buffer has been set */
87 /* The following "category" function returns one of the following */
88 #define SG_ERR_CAT_CLEAN 0 /* No errors or other information */
89 #define SG_ERR_CAT_MEDIA_CHANGED 1 /* interpreted from sense buffer */
90 #define SG_ERR_CAT_RESET 2 /* interpreted from sense buffer */
91 #define SG_ERR_CAT_TIMEOUT 3
92 #define SG_ERR_CAT_RECOVERED 4 /* Successful command after recovered err */
93 #define SG_ERR_CAT_NOTSUPPORTED 5 /* Illegal / unsupported command */
94 #define SG_ERR_CAT_SENSE 98 /* Something else in the sense buffer */
95 #define SG_ERR_CAT_OTHER 99 /* Some other error/warning */
97 static int do_scsi_page80_inquiry(struct udev *udev,
98 struct scsi_id_device *dev_scsi, int fd,
99 char *serial, char *serial_short, int max_len);
101 static int sg_err_category_new(struct udev *udev,
102 int scsi_status, int msg_status, int
103 host_status, int driver_status, const
104 unsigned char *sense_buffer, int sb_len)
109 * XXX change to return only two values - failed or OK.
112 if (!scsi_status && !host_status && !driver_status)
113 return SG_ERR_CAT_CLEAN;
115 if ((scsi_status == SCSI_CHECK_CONDITION) ||
116 (scsi_status == SCSI_COMMAND_TERMINATED) ||
117 ((driver_status & 0xf) == DRIVER_SENSE)) {
118 if (sense_buffer && (sb_len > 2)) {
122 if (sense_buffer[0] & 0x2) {
123 sense_key = sense_buffer[1] & 0xf;
124 asc = sense_buffer[2];
126 sense_key = sense_buffer[2] & 0xf;
127 asc = (sb_len > 12) ? sense_buffer[12] : 0;
130 if (sense_key == RECOVERED_ERROR)
131 return SG_ERR_CAT_RECOVERED;
132 else if (sense_key == UNIT_ATTENTION) {
134 return SG_ERR_CAT_MEDIA_CHANGED;
136 return SG_ERR_CAT_RESET;
137 } else if (sense_key == ILLEGAL_REQUEST) {
138 return SG_ERR_CAT_NOTSUPPORTED;
141 return SG_ERR_CAT_SENSE;
144 if ((host_status == DID_NO_CONNECT) ||
145 (host_status == DID_BUS_BUSY) ||
146 (host_status == DID_TIME_OUT))
147 return SG_ERR_CAT_TIMEOUT;
150 if (driver_status == DRIVER_TIMEOUT)
151 return SG_ERR_CAT_TIMEOUT;
153 return SG_ERR_CAT_OTHER;
156 static int sg_err_category3(struct udev *udev, struct sg_io_hdr *hp)
158 return sg_err_category_new(udev,
159 hp->status, hp->msg_status,
160 hp->host_status, hp->driver_status,
161 hp->sbp, hp->sb_len_wr);
164 static int sg_err_category4(struct udev *udev, struct sg_io_v4 *hp)
166 return sg_err_category_new(udev, hp->device_status, 0,
167 hp->transport_status, hp->driver_status,
168 (unsigned char *)(uintptr_t)hp->response,
172 static int scsi_dump_sense(struct udev *udev,
173 struct scsi_id_device *dev_scsi,
174 unsigned char *sense_buffer, int sb_len)
182 char out_buffer[256];
187 * Figure out and print the sense key, asc and ascq.
189 * If you want to suppress these for a particular drive model, add
190 * a black list entry in the scsi_id config file.
192 * XXX We probably need to: lookup the sense/asc/ascq in a retry
193 * table, and if found return 1 (after dumping the sense, asc, and
194 * ascq). So, if/when we get something like a power on/reset,
195 * we'll retry the command.
199 log_debug("%s: sense buffer empty", dev_scsi->kernel);
203 sense_class = (sense_buffer[0] >> 4) & 0x07;
204 code = sense_buffer[0] & 0xf;
206 if (sense_class == 7) {
208 * extended sense data.
210 s = sense_buffer[7] + 8;
212 log_debug("%s: sense buffer too small %d bytes, %d bytes too short",
213 dev_scsi->kernel, sb_len, s - sb_len);
216 if ((code == 0x0) || (code == 0x1)) {
217 sense_key = sense_buffer[2] & 0xf;
222 log_debug("%s: sense result too" " small %d bytes",
223 dev_scsi->kernel, s);
226 asc = sense_buffer[12];
227 ascq = sense_buffer[13];
228 } else if ((code == 0x2) || (code == 0x3)) {
229 sense_key = sense_buffer[1] & 0xf;
230 asc = sense_buffer[2];
231 ascq = sense_buffer[3];
233 log_debug("%s: invalid sense code 0x%x",
234 dev_scsi->kernel, code);
237 log_debug("%s: sense key 0x%x ASC 0x%x ASCQ 0x%x",
238 dev_scsi->kernel, sense_key, asc, ascq);
241 log_debug("%s: sense buffer too small %d bytes, %d bytes too short",
242 dev_scsi->kernel, sb_len, 4 - sb_len);
246 if (sense_buffer[0] < 15)
247 log_debug("%s: old sense key: 0x%x", dev_scsi->kernel, sense_buffer[0] & 0x0f);
249 log_debug("%s: sense = %2x %2x",
250 dev_scsi->kernel, sense_buffer[0], sense_buffer[2]);
251 log_debug("%s: non-extended sense class %d code 0x%0x",
252 dev_scsi->kernel, sense_class, code);
257 for (i = 0, j = 0; (i < s) && (j < 254); i++) {
258 out_buffer[j++] = hex_str[(sense_buffer[i] & 0xf0) >> 4];
259 out_buffer[j++] = hex_str[sense_buffer[i] & 0x0f];
260 out_buffer[j++] = ' ';
262 out_buffer[j] = '\0';
263 log_debug("%s: sense dump:", dev_scsi->kernel);
264 log_debug("%s: %s", dev_scsi->kernel, out_buffer);
270 static int scsi_dump(struct udev *udev,
271 struct scsi_id_device *dev_scsi, struct sg_io_hdr *io)
273 if (!io->status && !io->host_status && !io->msg_status &&
274 !io->driver_status) {
276 * Impossible, should not be called.
278 log_debug("%s: called with no error", __FUNCTION__);
282 log_debug("%s: sg_io failed status 0x%x 0x%x 0x%x 0x%x",
283 dev_scsi->kernel, io->driver_status, io->host_status, io->msg_status, io->status);
284 if (io->status == SCSI_CHECK_CONDITION)
285 return scsi_dump_sense(udev, dev_scsi, io->sbp, io->sb_len_wr);
290 static int scsi_dump_v4(struct udev *udev,
291 struct scsi_id_device *dev_scsi, struct sg_io_v4 *io)
293 if (!io->device_status && !io->transport_status &&
294 !io->driver_status) {
296 * Impossible, should not be called.
298 log_debug("%s: called with no error", __FUNCTION__);
302 log_debug("%s: sg_io failed status 0x%x 0x%x 0x%x",
303 dev_scsi->kernel, io->driver_status, io->transport_status,
305 if (io->device_status == SCSI_CHECK_CONDITION)
306 return scsi_dump_sense(udev, dev_scsi, (unsigned char *)(uintptr_t)io->response,
312 static int scsi_inquiry(struct udev *udev,
313 struct scsi_id_device *dev_scsi, int fd,
314 unsigned char evpd, unsigned char page,
315 unsigned char *buf, unsigned int buflen)
317 unsigned char inq_cmd[INQUIRY_CMDLEN] =
318 { INQUIRY_CMD, evpd, page, 0, buflen, 0 };
319 unsigned char sense[SENSE_BUFF_LEN];
321 struct sg_io_v4 io_v4;
322 struct sg_io_hdr io_hdr;
323 int retry = 3; /* rather random */
326 if (buflen > SCSI_INQ_BUFF_LEN) {
327 log_debug("buflen %d too long", buflen);
332 if (dev_scsi->use_sg == 4) {
333 memzero(&io_v4, sizeof(struct sg_io_v4));
335 io_v4.protocol = BSG_PROTOCOL_SCSI;
336 io_v4.subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD;
337 io_v4.request_len = sizeof(inq_cmd);
338 io_v4.request = (uintptr_t)inq_cmd;
339 io_v4.max_response_len = sizeof(sense);
340 io_v4.response = (uintptr_t)sense;
341 io_v4.din_xfer_len = buflen;
342 io_v4.din_xferp = (uintptr_t)buf;
343 io_buf = (void *)&io_v4;
345 memzero(&io_hdr, sizeof(struct sg_io_hdr));
346 io_hdr.interface_id = 'S';
347 io_hdr.cmd_len = sizeof(inq_cmd);
348 io_hdr.mx_sb_len = sizeof(sense);
349 io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
350 io_hdr.dxfer_len = buflen;
352 io_hdr.cmdp = inq_cmd;
354 io_hdr.timeout = DEF_TIMEOUT;
355 io_buf = (void *)&io_hdr;
358 retval = ioctl(fd, SG_IO, io_buf);
360 if ((errno == EINVAL || errno == ENOSYS) && dev_scsi->use_sg == 4) {
361 dev_scsi->use_sg = 3;
364 log_debug("%s: ioctl failed: %m", dev_scsi->kernel);
368 if (dev_scsi->use_sg == 4)
369 retval = sg_err_category4(udev, io_buf);
371 retval = sg_err_category3(udev, io_buf);
374 case SG_ERR_CAT_NOTSUPPORTED:
377 case SG_ERR_CAT_CLEAN:
378 case SG_ERR_CAT_RECOVERED:
383 if (dev_scsi->use_sg == 4)
384 retval = scsi_dump_v4(udev, dev_scsi, io_buf);
386 retval = scsi_dump(udev, dev_scsi, io_buf);
391 } else if (retval > 0) {
399 log_debug("%s: Unable to get INQUIRY vpd %d page 0x%x.",
400 dev_scsi->kernel, evpd, page);
405 /* Get list of supported EVPD pages */
406 static int do_scsi_page0_inquiry(struct udev *udev,
407 struct scsi_id_device *dev_scsi, int fd,
408 unsigned char *buffer, unsigned int len)
412 memzero(buffer, len);
413 retval = scsi_inquiry(udev, dev_scsi, fd, 1, 0x0, buffer, len);
417 if (buffer[1] != 0) {
418 log_debug("%s: page 0 not available.", dev_scsi->kernel);
421 if (buffer[3] > len) {
422 log_debug("%s: page 0 buffer too long %d", dev_scsi->kernel, buffer[3]);
427 * Following check is based on code once included in the 2.5.x
430 * Some ill behaved devices return the standard inquiry here
431 * rather than the evpd data, snoop the data to verify.
433 if (buffer[3] > MODEL_LENGTH) {
435 * If the vendor id appears in the page assume the page is
438 if (strneq((char *)&buffer[VENDOR_LENGTH], dev_scsi->vendor, VENDOR_LENGTH)) {
439 log_debug("%s: invalid page0 data", dev_scsi->kernel);
447 * The caller checks that serial is long enough to include the vendor +
450 static int prepend_vendor_model(struct udev *udev,
451 struct scsi_id_device *dev_scsi, char *serial)
455 strncpy(serial, dev_scsi->vendor, VENDOR_LENGTH);
456 strncat(serial, dev_scsi->model, MODEL_LENGTH);
457 ind = strlen(serial);
460 * This is not a complete check, since we are using strncat/cpy
461 * above, ind will never be too large.
463 if (ind != (VENDOR_LENGTH + MODEL_LENGTH)) {
464 log_debug("%s: expected length %d, got length %d",
465 dev_scsi->kernel, (VENDOR_LENGTH + MODEL_LENGTH), ind);
472 * check_fill_0x83_id - check the page 0x83 id, if OK allocate and fill
475 static int check_fill_0x83_id(struct udev *udev,
476 struct scsi_id_device *dev_scsi,
477 unsigned char *page_83,
478 const struct scsi_id_search_values
479 *id_search, char *serial, char *serial_short,
480 int max_len, char *wwn,
481 char *wwn_vendor_extension, char *tgpt_group)
486 * ASSOCIATION must be with the device (value 0)
487 * or with the target port for SCSI_ID_TGTPORT
489 if ((page_83[1] & 0x30) == 0x10) {
490 if (id_search->id_type != SCSI_ID_TGTGROUP)
492 } else if ((page_83[1] & 0x30) != 0) {
496 if ((page_83[1] & 0x0f) != id_search->id_type)
500 * Possibly check NAA sub-type.
502 if ((id_search->naa_type != SCSI_ID_NAA_DONT_CARE) &&
503 (id_search->naa_type != (page_83[4] & 0xf0) >> 4))
507 * Check for matching code set - ASCII or BINARY.
509 if ((page_83[0] & 0x0f) != id_search->code_set)
513 * page_83[3]: identifier length
516 if ((page_83[0] & 0x0f) != SCSI_ID_ASCII)
518 * If not ASCII, use two bytes for each binary value.
523 * Add one byte for the NUL termination, and one for the id_type.
526 if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC)
527 len += VENDOR_LENGTH + MODEL_LENGTH;
530 log_debug("%s: length %d too short - need %d",
531 dev_scsi->kernel, max_len, len);
535 if (id_search->id_type == SCSI_ID_TGTGROUP && tgpt_group != NULL) {
538 group = ((unsigned int)page_83[6] << 8) | page_83[7];
539 sprintf(tgpt_group,"%x", group);
543 serial[0] = hex_str[id_search->id_type];
546 * For SCSI_ID_VENDOR_SPECIFIC prepend the vendor and model before
547 * the id since it is not unique across all vendors and models,
548 * this differs from SCSI_ID_T10_VENDOR, where the vendor is
549 * included in the identifier.
551 if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC)
552 if (prepend_vendor_model(udev, dev_scsi, &serial[1]) < 0)
555 i = 4; /* offset to the start of the identifier */
556 s = j = strlen(serial);
557 if ((page_83[0] & 0x0f) == SCSI_ID_ASCII) {
561 while (i < (4 + page_83[3]))
562 serial[j++] = page_83[i++];
565 * Binary descriptor, convert to ASCII, using two bytes of
566 * ASCII for each byte in the page_83.
568 while (i < (4 + page_83[3])) {
569 serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4];
570 serial[j++] = hex_str[page_83[i] & 0x0f];
575 strcpy(serial_short, &serial[s]);
577 if (id_search->id_type == SCSI_ID_NAA && wwn != NULL) {
578 strncpy(wwn, &serial[s], 16);
579 if (wwn_vendor_extension != NULL) {
580 strncpy(wwn_vendor_extension, &serial[s + 16], 16);
587 /* Extract the raw binary from VPD 0x83 pre-SPC devices */
588 static int check_fill_0x83_prespc3(struct udev *udev,
589 struct scsi_id_device *dev_scsi,
590 unsigned char *page_83,
591 const struct scsi_id_search_values
592 *id_search, char *serial, char *serial_short, int max_len)
596 serial[0] = hex_str[id_search->id_type];
597 /* serial has been memset to zero before */
598 j = strlen(serial); /* j = 1; */
600 for (i = 0; (i < page_83[3]) && (j < max_len-3); ++i) {
601 serial[j++] = hex_str[(page_83[4+i] & 0xf0) >> 4];
602 serial[j++] = hex_str[ page_83[4+i] & 0x0f];
604 serial[max_len-1] = 0;
605 strncpy(serial_short, serial, max_len-1);
610 /* Get device identification VPD page */
611 static int do_scsi_page83_inquiry(struct udev *udev,
612 struct scsi_id_device *dev_scsi, int fd,
613 char *serial, char *serial_short, int len,
614 char *unit_serial_number, char *wwn,
615 char *wwn_vendor_extension, char *tgpt_group)
618 unsigned int id_ind, j;
619 unsigned char page_83[SCSI_INQ_BUFF_LEN];
621 /* also pick up the page 80 serial number */
622 do_scsi_page80_inquiry(udev, dev_scsi, fd, NULL, unit_serial_number, MAX_SERIAL_LEN);
624 memzero(page_83, SCSI_INQ_BUFF_LEN);
625 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83,
630 if (page_83[1] != PAGE_83) {
631 log_debug("%s: Invalid page 0x83", dev_scsi->kernel);
636 * XXX Some devices (IBM 3542) return all spaces for an identifier if
637 * the LUN is not actually configured. This leads to identifiers of
642 * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
643 * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
645 * The SCSI-2 page 83 format returns an IEEE WWN in binary
646 * encoded hexi-decimal in the 16 bytes following the initial
647 * 4-byte page 83 reply header.
649 * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
650 * of an Identification descriptor. The 3rd byte of the first
651 * Identification descriptor is a reserved (BSZ) byte field.
653 * Reference the 7th byte of the page 83 reply to determine
654 * whether the reply is compliant with SCSI-2 or SPC-2/3
655 * specifications. A zero value in the 7th byte indicates
656 * an SPC-2/3 conformant reply, (i.e., the reserved field of the
657 * first Identification descriptor). This byte will be non-zero
658 * for a SCSI-2 conformant page 83 reply from these EMC
659 * Symmetrix models since the 7th byte of the reply corresponds
660 * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
665 return check_fill_0x83_prespc3(udev,
666 dev_scsi, page_83, id_search_list,
667 serial, serial_short, len);
670 * Search for a match in the prioritized id_search_list - since WWN ids
671 * come first we can pick up the WWN in check_fill_0x83_id().
674 id_ind < sizeof(id_search_list)/sizeof(id_search_list[0]);
677 * Examine each descriptor returned. There is normally only
678 * one or a small number of descriptors.
680 for (j = 4; j <= (unsigned int)page_83[3] + 3; j += page_83[j + 3] + 4) {
681 retval = check_fill_0x83_id(udev,
682 dev_scsi, &page_83[j],
683 &id_search_list[id_ind],
684 serial, serial_short, len,
685 wwn, wwn_vendor_extension,
697 * Get device identification VPD page for older SCSI-2 device which is not
698 * compliant with either SPC-2 or SPC-3 format.
700 * Return the hard coded error code value 2 if the page 83 reply is not
701 * conformant to the SCSI-2 format.
703 static int do_scsi_page83_prespc3_inquiry(struct udev *udev,
704 struct scsi_id_device *dev_scsi, int fd,
705 char *serial, char *serial_short, int len)
709 unsigned char page_83[SCSI_INQ_BUFF_LEN];
711 memzero(page_83, SCSI_INQ_BUFF_LEN);
712 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83, SCSI_INQ_BUFF_LEN);
716 if (page_83[1] != PAGE_83) {
717 log_debug("%s: Invalid page 0x83", dev_scsi->kernel);
721 * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
722 * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
724 * The SCSI-2 page 83 format returns an IEEE WWN in binary
725 * encoded hexi-decimal in the 16 bytes following the initial
726 * 4-byte page 83 reply header.
728 * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
729 * of an Identification descriptor. The 3rd byte of the first
730 * Identification descriptor is a reserved (BSZ) byte field.
732 * Reference the 7th byte of the page 83 reply to determine
733 * whether the reply is compliant with SCSI-2 or SPC-2/3
734 * specifications. A zero value in the 7th byte indicates
735 * an SPC-2/3 conformant reply, (i.e., the reserved field of the
736 * first Identification descriptor). This byte will be non-zero
737 * for a SCSI-2 conformant page 83 reply from these EMC
738 * Symmetrix models since the 7th byte of the reply corresponds
739 * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
745 serial[0] = hex_str[id_search_list[0].id_type];
747 * The first four bytes contain data, not a descriptor.
752 * Binary descriptor, convert to ASCII,
753 * using two bytes of ASCII for each byte
756 while (i < (page_83[3]+4)) {
757 serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4];
758 serial[j++] = hex_str[page_83[i] & 0x0f];
764 /* Get unit serial number VPD page */
765 static int do_scsi_page80_inquiry(struct udev *udev,
766 struct scsi_id_device *dev_scsi, int fd,
767 char *serial, char *serial_short, int max_len)
773 unsigned char buf[SCSI_INQ_BUFF_LEN];
775 memzero(buf, SCSI_INQ_BUFF_LEN);
776 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_80, buf, SCSI_INQ_BUFF_LEN);
780 if (buf[1] != PAGE_80) {
781 log_debug("%s: Invalid page 0x80", dev_scsi->kernel);
785 len = 1 + VENDOR_LENGTH + MODEL_LENGTH + buf[3];
787 log_debug("%s: length %d too short - need %d",
788 dev_scsi->kernel, max_len, len);
792 * Prepend 'S' to avoid unlikely collision with page 0x83 vendor
793 * specific type where we prepend '0' + vendor + model.
796 if (serial != NULL) {
798 ser_ind = prepend_vendor_model(udev, dev_scsi, &serial[1]);
801 ser_ind++; /* for the leading 'S' */
802 for (i = 4; i < len + 4; i++, ser_ind++)
803 serial[ser_ind] = buf[i];
805 if (serial_short != NULL) {
806 memcpy(serial_short, &buf[4], len);
807 serial_short[len] = '\0';
812 int scsi_std_inquiry(struct udev *udev,
813 struct scsi_id_device *dev_scsi, const char *devname)
816 unsigned char buf[SCSI_INQ_BUFF_LEN];
820 fd = open(devname, O_RDONLY | O_NONBLOCK | O_CLOEXEC);
822 log_debug("scsi_id: cannot open %s: %m", devname);
826 if (fstat(fd, &statbuf) < 0) {
827 log_debug("scsi_id: cannot stat %s: %m", devname);
831 sprintf(dev_scsi->kernel,"%d:%d", major(statbuf.st_rdev),
832 minor(statbuf.st_rdev));
834 memzero(buf, SCSI_INQ_BUFF_LEN);
835 err = scsi_inquiry(udev, dev_scsi, fd, 0, 0, buf, SCSI_INQ_BUFF_LEN);
840 memcpy(dev_scsi->vendor, buf + 8, 8);
841 dev_scsi->vendor[8] = '\0';
842 memcpy(dev_scsi->model, buf + 16, 16);
843 dev_scsi->model[16] = '\0';
844 memcpy(dev_scsi->revision, buf + 32, 4);
845 dev_scsi->revision[4] = '\0';
846 sprintf(dev_scsi->type,"%x", buf[0] & 0x1f);
853 int scsi_get_serial(struct udev *udev,
854 struct scsi_id_device *dev_scsi, const char *devname,
855 int page_code, int len)
857 unsigned char page0[SCSI_INQ_BUFF_LEN];
863 memzero(dev_scsi->serial, len);
864 srand((unsigned int)getpid());
865 for (cnt = 20; cnt > 0; cnt--) {
866 struct timespec duration;
868 fd = open(devname, O_RDONLY | O_NONBLOCK | O_CLOEXEC);
869 if (fd >= 0 || errno != EBUSY)
872 duration.tv_nsec = (200 * 1000 * 1000) + (rand() % 100 * 1000 * 1000);
873 nanosleep(&duration, NULL);
878 if (page_code == PAGE_80) {
879 if (do_scsi_page80_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) {
886 } else if (page_code == PAGE_83) {
887 if (do_scsi_page83_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len, dev_scsi->unit_serial_number, dev_scsi->wwn, dev_scsi->wwn_vendor_extension, dev_scsi->tgpt_group)) {
894 } else if (page_code == PAGE_83_PRE_SPC3) {
895 retval = do_scsi_page83_prespc3_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len);
898 * Fallback to servicing a SPC-2/3 compliant page 83
899 * inquiry if the page 83 reply format does not
900 * conform to pre-SPC3 expectations.
903 if (do_scsi_page83_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len, dev_scsi->unit_serial_number, dev_scsi->wwn, dev_scsi->wwn_vendor_extension, dev_scsi->tgpt_group)) {
919 } else if (page_code != 0x00) {
920 log_debug("%s: unsupported page code 0x%d", dev_scsi->kernel, page_code);
926 * Get page 0, the page of the pages. By default, try from best to
927 * worst of supported pages: 0x83 then 0x80.
929 if (do_scsi_page0_inquiry(udev, dev_scsi, fd, page0, SCSI_INQ_BUFF_LEN)) {
931 * Don't try anything else. Black list if a specific page
932 * should be used for this vendor+model, or maybe have an
933 * optional fall-back to page 0x80 or page 0x83.
939 for (ind = 4; ind <= page0[3] + 3; ind++)
940 if (page0[ind] == PAGE_83)
941 if (!do_scsi_page83_inquiry(udev, dev_scsi, fd,
942 dev_scsi->serial, dev_scsi->serial_short, len, dev_scsi->unit_serial_number, dev_scsi->wwn, dev_scsi->wwn_vendor_extension, dev_scsi->tgpt_group)) {
950 for (ind = 4; ind <= page0[3] + 3; ind++)
951 if (page0[ind] == PAGE_80)
952 if (!do_scsi_page80_inquiry(udev, dev_scsi, fd,
953 dev_scsi->serial, dev_scsi->serial_short, len)) {