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 <scsi/scsi.h>
29 #include <linux/types.h>
30 /* #include <linux/bsg.h> */
33 #include "../../udev/udev.h"
38 * A priority based list of id, naa, and binary/ascii for the identifier
39 * descriptor in VPD page 0x83.
41 * Brute force search for a match starting with the first value in the
42 * following id_search_list. This is not a performance issue, since there
43 * is normally one or some small number of descriptors.
45 static const struct scsi_id_search_values id_search_list[] = {
46 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG_EXTENDED, SCSI_ID_BINARY },
47 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG_EXTENDED, SCSI_ID_ASCII },
48 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG, SCSI_ID_BINARY },
49 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG, SCSI_ID_ASCII },
51 * Devices already exist using NAA values that are now marked
52 * reserved. These should not conflict with other values, or it is
53 * a bug in the device. As long as we find the IEEE extended one
54 * first, we really don't care what other ones are used. Using
55 * don't care here means that a device that returns multiple
56 * non-IEEE descriptors in a random order will get different
59 { SCSI_ID_NAA, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
60 { SCSI_ID_NAA, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
61 { SCSI_ID_EUI_64, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
62 { SCSI_ID_EUI_64, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
63 { SCSI_ID_T10_VENDOR, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
64 { SCSI_ID_T10_VENDOR, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
65 { SCSI_ID_VENDOR_SPECIFIC, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
66 { SCSI_ID_VENDOR_SPECIFIC, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
69 static const char hex_str[]="0123456789abcdef";
72 * Values returned in the result/status, only the ones used by the code
76 #define DID_NO_CONNECT 0x01 /* Unable to connect before timeout */
77 #define DID_BUS_BUSY 0x02 /* Bus remain busy until timeout */
78 #define DID_TIME_OUT 0x03 /* Timed out for some other reason */
79 #define DRIVER_TIMEOUT 0x06
80 #define DRIVER_SENSE 0x08 /* Sense_buffer has been set */
82 /* The following "category" function returns one of the following */
83 #define SG_ERR_CAT_CLEAN 0 /* No errors or other information */
84 #define SG_ERR_CAT_MEDIA_CHANGED 1 /* interpreted from sense buffer */
85 #define SG_ERR_CAT_RESET 2 /* interpreted from sense buffer */
86 #define SG_ERR_CAT_TIMEOUT 3
87 #define SG_ERR_CAT_RECOVERED 4 /* Successful command after recovered err */
88 #define SG_ERR_CAT_NOTSUPPORTED 5 /* Illegal / unsupported command */
89 #define SG_ERR_CAT_SENSE 98 /* Something else in the sense buffer */
90 #define SG_ERR_CAT_OTHER 99 /* Some other error/warning */
92 static int sg_err_category_new(struct udev *udev,
93 int scsi_status, int msg_status, int
94 host_status, int driver_status, const
95 unsigned char *sense_buffer, int sb_len)
100 * XXX change to return only two values - failed or OK.
103 if (!scsi_status && !host_status && !driver_status)
104 return SG_ERR_CAT_CLEAN;
106 if ((scsi_status == SCSI_CHECK_CONDITION) ||
107 (scsi_status == SCSI_COMMAND_TERMINATED) ||
108 ((driver_status & 0xf) == DRIVER_SENSE)) {
109 if (sense_buffer && (sb_len > 2)) {
113 if (sense_buffer[0] & 0x2) {
114 sense_key = sense_buffer[1] & 0xf;
115 asc = sense_buffer[2];
117 sense_key = sense_buffer[2] & 0xf;
118 asc = (sb_len > 12) ? sense_buffer[12] : 0;
121 if (sense_key == RECOVERED_ERROR)
122 return SG_ERR_CAT_RECOVERED;
123 else if (sense_key == UNIT_ATTENTION) {
125 return SG_ERR_CAT_MEDIA_CHANGED;
127 return SG_ERR_CAT_RESET;
128 } else if (sense_key == ILLEGAL_REQUEST) {
129 return SG_ERR_CAT_NOTSUPPORTED;
132 return SG_ERR_CAT_SENSE;
135 if ((host_status == DID_NO_CONNECT) ||
136 (host_status == DID_BUS_BUSY) ||
137 (host_status == DID_TIME_OUT))
138 return SG_ERR_CAT_TIMEOUT;
140 if (!driver_status) {
141 if (driver_status == DRIVER_TIMEOUT)
142 return SG_ERR_CAT_TIMEOUT;
144 return SG_ERR_CAT_OTHER;
147 static int sg_err_category3(struct udev *udev, struct sg_io_hdr *hp)
149 return sg_err_category_new(udev,
150 hp->status, hp->msg_status,
151 hp->host_status, hp->driver_status,
152 hp->sbp, hp->sb_len_wr);
155 static int sg_err_category4(struct udev *udev, struct sg_io_v4 *hp)
157 return sg_err_category_new(udev, hp->device_status, 0,
158 hp->transport_status, hp->driver_status,
159 (unsigned char *)(uintptr_t)hp->response,
163 static int scsi_dump_sense(struct udev *udev,
164 struct scsi_id_device *dev_scsi,
165 unsigned char *sense_buffer, int sb_len)
171 int descriptor_format;
174 char out_buffer[256];
179 * Figure out and print the sense key, asc and ascq.
181 * If you want to suppress these for a particular drive model, add
182 * a black list entry in the scsi_id config file.
184 * XXX We probably need to: lookup the sense/asc/ascq in a retry
185 * table, and if found return 1 (after dumping the sense, asc, and
186 * ascq). So, if/when we get something like a power on/reset,
187 * we'll retry the command.
190 dbg(udev, "got check condition\n");
193 info(udev, "%s: sense buffer empty\n", dev_scsi->kernel);
197 sense_class = (sense_buffer[0] >> 4) & 0x07;
198 code = sense_buffer[0] & 0xf;
200 if (sense_class == 7) {
202 * extended sense data.
204 s = sense_buffer[7] + 8;
206 info(udev, "%s: sense buffer too small %d bytes, %d bytes too short\n",
207 dev_scsi->kernel, sb_len, s - sb_len);
210 if ((code == 0x0) || (code == 0x1)) {
211 descriptor_format = 0;
212 sense_key = sense_buffer[2] & 0xf;
217 info(udev, "%s: sense result too" " small %d bytes\n",
218 dev_scsi->kernel, s);
221 asc = sense_buffer[12];
222 ascq = sense_buffer[13];
223 } else if ((code == 0x2) || (code == 0x3)) {
224 descriptor_format = 1;
225 sense_key = sense_buffer[1] & 0xf;
226 asc = sense_buffer[2];
227 ascq = sense_buffer[3];
229 info(udev, "%s: invalid sense code 0x%x\n",
230 dev_scsi->kernel, code);
233 info(udev, "%s: sense key 0x%x ASC 0x%x ASCQ 0x%x\n",
234 dev_scsi->kernel, sense_key, asc, ascq);
237 info(udev, "%s: sense buffer too small %d bytes, %d bytes too short\n",
238 dev_scsi->kernel, sb_len, 4 - sb_len);
242 if (sense_buffer[0] < 15)
243 info(udev, "%s: old sense key: 0x%x\n", dev_scsi->kernel, sense_buffer[0] & 0x0f);
245 info(udev, "%s: sense = %2x %2x\n",
246 dev_scsi->kernel, sense_buffer[0], sense_buffer[2]);
247 info(udev, "%s: non-extended sense class %d code 0x%0x\n",
248 dev_scsi->kernel, sense_class, code);
253 for (i = 0, j = 0; (i < s) && (j < 254); i++) {
254 dbg(udev, "i %d, j %d\n", i, j);
255 out_buffer[j++] = hex_str[(sense_buffer[i] & 0xf0) >> 4];
256 out_buffer[j++] = hex_str[sense_buffer[i] & 0x0f];
257 out_buffer[j++] = ' ';
259 out_buffer[j] = '\0';
260 info(udev, "%s: sense dump:\n", dev_scsi->kernel);
261 info(udev, "%s: %s\n", dev_scsi->kernel, out_buffer);
267 static int scsi_dump(struct udev *udev,
268 struct scsi_id_device *dev_scsi, struct sg_io_hdr *io)
270 if (!io->status && !io->host_status && !io->msg_status &&
271 !io->driver_status) {
273 * Impossible, should not be called.
275 info(udev, "%s: called with no error\n", __FUNCTION__);
279 info(udev, "%s: sg_io failed status 0x%x 0x%x 0x%x 0x%x\n",
280 dev_scsi->kernel, io->driver_status, io->host_status, io->msg_status, io->status);
281 if (io->status == SCSI_CHECK_CONDITION)
282 return scsi_dump_sense(udev, dev_scsi, io->sbp, io->sb_len_wr);
287 static int scsi_dump_v4(struct udev *udev,
288 struct scsi_id_device *dev_scsi, struct sg_io_v4 *io)
290 if (!io->device_status && !io->transport_status &&
291 !io->driver_status) {
293 * Impossible, should not be called.
295 info(udev, "%s: called with no error\n", __FUNCTION__);
299 info(udev, "%s: sg_io failed status 0x%x 0x%x 0x%x\n",
300 dev_scsi->kernel, io->driver_status, io->transport_status,
302 if (io->device_status == SCSI_CHECK_CONDITION)
303 return scsi_dump_sense(udev, dev_scsi, (unsigned char *)(uintptr_t)io->response,
309 static int scsi_inquiry(struct udev *udev,
310 struct scsi_id_device *dev_scsi, int fd,
311 unsigned char evpd, unsigned char page,
312 unsigned char *buf, unsigned int buflen)
314 unsigned char inq_cmd[INQUIRY_CMDLEN] =
315 { INQUIRY_CMD, evpd, page, 0, buflen, 0 };
316 unsigned char sense[SENSE_BUFF_LEN];
319 int retry = 3; /* rather random */
321 if (buflen > SCSI_INQ_BUFF_LEN) {
322 info(udev, "buflen %d too long\n", buflen);
327 dbg(udev, "%s evpd %d, page 0x%x\n", dev_scsi->kernel, evpd, page);
329 if (dev_scsi->use_sg == 4) {
330 struct sg_io_v4 io_v4;
332 memset(&io_v4, 0, sizeof(struct sg_io_v4));
334 io_v4.protocol = BSG_PROTOCOL_SCSI;
335 io_v4.subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD;
336 io_v4.request_len = sizeof(inq_cmd);
337 io_v4.request = (uintptr_t)inq_cmd;
338 io_v4.max_response_len = sizeof(sense);
339 io_v4.response = (uintptr_t)sense;
340 io_v4.din_xfer_len = buflen;
341 io_v4.din_xferp = (uintptr_t)buf;
342 io_buf = (void *)&io_v4;
344 struct sg_io_hdr io_hdr;
346 memset(&io_hdr, 0, sizeof(struct sg_io_hdr));
347 io_hdr.interface_id = 'S';
348 io_hdr.cmd_len = sizeof(inq_cmd);
349 io_hdr.mx_sb_len = sizeof(sense);
350 io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
351 io_hdr.dxfer_len = buflen;
353 io_hdr.cmdp = inq_cmd;
355 io_hdr.timeout = DEF_TIMEOUT;
356 io_buf = (void *)&io_hdr;
359 retval = ioctl(fd, SG_IO, io_buf);
361 if ((errno == EINVAL || errno == ENOSYS) && dev_scsi->use_sg == 4) {
362 dev_scsi->use_sg = 3;
365 info(udev, "%s: ioctl failed: %s\n", dev_scsi->kernel, strerror(errno));
369 if (dev_scsi->use_sg == 4)
370 retval = sg_err_category4(udev, io_buf);
372 retval = sg_err_category3(udev, io_buf);
375 case SG_ERR_CAT_NOTSUPPORTED:
378 case SG_ERR_CAT_CLEAN:
379 case SG_ERR_CAT_RECOVERED:
384 if (dev_scsi->use_sg == 4)
385 retval = scsi_dump_v4(udev, dev_scsi, io_buf);
387 retval = scsi_dump(udev, dev_scsi, io_buf);
392 } else if (retval > 0) {
394 dbg(udev, "%s: Retrying ...\n", dev_scsi->kernel);
402 info(udev, "%s: Unable to get INQUIRY vpd %d page 0x%x.\n",
403 dev_scsi->kernel, evpd, page);
408 /* Get list of supported EVPD pages */
409 static int do_scsi_page0_inquiry(struct udev *udev,
410 struct scsi_id_device *dev_scsi, int fd,
411 unsigned char *buffer, unsigned int len)
415 memset(buffer, 0, len);
416 retval = scsi_inquiry(udev, dev_scsi, fd, 1, 0x0, buffer, len);
420 if (buffer[1] != 0) {
421 info(udev, "%s: page 0 not available.\n", dev_scsi->kernel);
424 if (buffer[3] > len) {
425 info(udev, "%s: page 0 buffer too long %d\n", dev_scsi->kernel, buffer[3]);
430 * Following check is based on code once included in the 2.5.x
433 * Some ill behaved devices return the standard inquiry here
434 * rather than the evpd data, snoop the data to verify.
436 if (buffer[3] > MODEL_LENGTH) {
438 * If the vendor id appears in the page assume the page is
441 if (!strncmp((char *)&buffer[VENDOR_LENGTH], dev_scsi->vendor, VENDOR_LENGTH)) {
442 info(udev, "%s: invalid page0 data\n", dev_scsi->kernel);
450 * The caller checks that serial is long enough to include the vendor +
453 static int prepend_vendor_model(struct udev *udev,
454 struct scsi_id_device *dev_scsi, char *serial)
458 strncpy(serial, dev_scsi->vendor, VENDOR_LENGTH);
459 ind = strlen(serial) - 1;
461 strncat(serial, dev_scsi->model, MODEL_LENGTH);
462 ind = strlen(serial) - 1;
466 * This is not a complete check, since we are using strncat/cpy
467 * above, ind will never be too large.
469 if (ind != (VENDOR_LENGTH + MODEL_LENGTH)) {
470 info(udev, "%s: expected length %d, got length %d\n",
471 dev_scsi->kernel, (VENDOR_LENGTH + MODEL_LENGTH), ind);
478 * check_fill_0x83_id - check the page 0x83 id, if OK allocate and fill
481 static int check_fill_0x83_id(struct udev *udev,
482 struct scsi_id_device *dev_scsi,
483 unsigned char *page_83,
484 const struct scsi_id_search_values
485 *id_search, char *serial, char *serial_short, int max_len)
490 * ASSOCIATION must be with the device (value 0)
492 if ((page_83[1] & 0x30) != 0)
495 if ((page_83[1] & 0x0f) != id_search->id_type)
499 * Possibly check NAA sub-type.
501 if ((id_search->naa_type != SCSI_ID_NAA_DONT_CARE) &&
502 (id_search->naa_type != (page_83[4] & 0xf0) >> 4))
506 * Check for matching code set - ASCII or BINARY.
508 if ((page_83[0] & 0x0f) != id_search->code_set)
512 * page_83[3]: identifier length
515 if ((page_83[0] & 0x0f) != SCSI_ID_ASCII)
517 * If not ASCII, use two bytes for each binary value.
522 * Add one byte for the NUL termination, and one for the id_type.
525 if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC)
526 len += VENDOR_LENGTH + MODEL_LENGTH;
529 info(udev, "%s: length %d too short - need %d\n",
530 dev_scsi->kernel, max_len, len);
534 serial[0] = hex_str[id_search->id_type];
537 * For SCSI_ID_VENDOR_SPECIFIC prepend the vendor and model before
538 * the id since it is not unique across all vendors and models,
539 * this differs from SCSI_ID_T10_VENDOR, where the vendor is
540 * included in the identifier.
542 if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC)
543 if (prepend_vendor_model(udev, dev_scsi, &serial[1]) < 0) {
544 dbg(udev, "prepend failed\n");
548 i = 4; /* offset to the start of the identifier */
549 s = j = strlen(serial);
550 if ((page_83[0] & 0x0f) == SCSI_ID_ASCII) {
554 while (i < (4 + page_83[3]))
555 serial[j++] = page_83[i++];
558 * Binary descriptor, convert to ASCII, using two bytes of
559 * ASCII for each byte in the page_83.
561 while (i < (4 + page_83[3])) {
562 serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4];
563 serial[j++] = hex_str[page_83[i] & 0x0f];
568 strcpy(serial_short, &serial[s]);
572 /* Extract the raw binary from VPD 0x83 pre-SPC devices */
573 static int check_fill_0x83_prespc3(struct udev *udev,
574 struct scsi_id_device *dev_scsi,
575 unsigned char *page_83,
576 const struct scsi_id_search_values
577 *id_search, char *serial, char *serial_short, int max_len)
581 dbg(udev, "using pre-spc3-83 for %s\n", dev_scsi->kernel);
582 serial[0] = hex_str[id_search->id_type];
583 /* serial has been memset to zero before */
584 j = strlen(serial); /* j = 1; */
586 for (i = 0; i < page_83[3]; ++i) {
587 serial[j++] = hex_str[(page_83[4+i] & 0xf0) >> 4];
588 serial[j++] = hex_str[ page_83[4+i] & 0x0f];
590 strcpy(serial_short, serial);
595 /* Get device identification VPD page */
596 static int do_scsi_page83_inquiry(struct udev *udev,
597 struct scsi_id_device *dev_scsi, int fd,
598 char *serial, char *serial_short, int len)
601 unsigned int id_ind, j;
602 unsigned char page_83[SCSI_INQ_BUFF_LEN];
604 memset(page_83, 0, SCSI_INQ_BUFF_LEN);
605 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83,
610 if (page_83[1] != PAGE_83) {
611 info(udev, "%s: Invalid page 0x83\n", dev_scsi->kernel);
616 * XXX Some devices (IBM 3542) return all spaces for an identifier if
617 * the LUN is not actually configured. This leads to identifers of
622 * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
623 * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
625 * The SCSI-2 page 83 format returns an IEEE WWN in binary
626 * encoded hexi-decimal in the 16 bytes following the initial
627 * 4-byte page 83 reply header.
629 * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
630 * of an Identification descriptor. The 3rd byte of the first
631 * Identification descriptor is a reserved (BSZ) byte field.
633 * Reference the 7th byte of the page 83 reply to determine
634 * whether the reply is compliant with SCSI-2 or SPC-2/3
635 * specifications. A zero value in the 7th byte indicates
636 * an SPC-2/3 conformant reply, (i.e., the reserved field of the
637 * first Identification descriptor). This byte will be non-zero
638 * for a SCSI-2 conformant page 83 reply from these EMC
639 * Symmetrix models since the 7th byte of the reply corresponds
640 * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
645 return check_fill_0x83_prespc3(udev,
646 dev_scsi, page_83, id_search_list,
647 serial, serial_short, len);
650 * Search for a match in the prioritized id_search_list.
653 id_ind < sizeof(id_search_list)/sizeof(id_search_list[0]);
656 * Examine each descriptor returned. There is normally only
657 * one or a small number of descriptors.
659 for (j = 4; j <= (unsigned int)page_83[3] + 3; j += page_83[j + 3] + 4) {
660 retval = check_fill_0x83_id(udev,
661 dev_scsi, &page_83[j],
662 &id_search_list[id_ind],
663 serial, serial_short, len);
664 dbg(udev, "%s id desc %d/%d/%d\n", dev_scsi->kernel,
665 id_search_list[id_ind].id_type,
666 id_search_list[id_ind].naa_type,
667 id_search_list[id_ind].code_set);
669 dbg(udev, " used\n");
671 } else if (retval < 0) {
672 dbg(udev, " failed\n");
675 dbg(udev, " not used\n");
683 * Get device identification VPD page for older SCSI-2 device which is not
684 * compliant with either SPC-2 or SPC-3 format.
686 * Return the hard coded error code value 2 if the page 83 reply is not
687 * conformant to the SCSI-2 format.
689 static int do_scsi_page83_prespc3_inquiry(struct udev *udev,
690 struct scsi_id_device *dev_scsi, int fd,
691 char *serial, char *serial_short, int len)
695 unsigned char page_83[SCSI_INQ_BUFF_LEN];
697 memset(page_83, 0, SCSI_INQ_BUFF_LEN);
698 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83, SCSI_INQ_BUFF_LEN);
702 if (page_83[1] != PAGE_83) {
703 info(udev, "%s: Invalid page 0x83\n", dev_scsi->kernel);
707 * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
708 * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
710 * The SCSI-2 page 83 format returns an IEEE WWN in binary
711 * encoded hexi-decimal in the 16 bytes following the initial
712 * 4-byte page 83 reply header.
714 * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
715 * of an Identification descriptor. The 3rd byte of the first
716 * Identification descriptor is a reserved (BSZ) byte field.
718 * Reference the 7th byte of the page 83 reply to determine
719 * whether the reply is compliant with SCSI-2 or SPC-2/3
720 * specifications. A zero value in the 7th byte indicates
721 * an SPC-2/3 conformant reply, (i.e., the reserved field of the
722 * first Identification descriptor). This byte will be non-zero
723 * for a SCSI-2 conformant page 83 reply from these EMC
724 * Symmetrix models since the 7th byte of the reply corresponds
725 * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
731 serial[0] = hex_str[id_search_list[0].id_type];
733 * The first four bytes contain data, not a descriptor.
738 * Binary descriptor, convert to ASCII,
739 * using two bytes of ASCII for each byte
742 while (i < (page_83[3]+4)) {
743 serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4];
744 serial[j++] = hex_str[page_83[i] & 0x0f];
747 dbg(udev, "using pre-spc3-83 for %s\n", dev_scsi->kernel);
751 /* Get unit serial number VPD page */
752 static int do_scsi_page80_inquiry(struct udev *udev,
753 struct scsi_id_device *dev_scsi, int fd,
754 char *serial, char *serial_short, int max_len)
760 unsigned char buf[SCSI_INQ_BUFF_LEN];
762 memset(buf, 0, SCSI_INQ_BUFF_LEN);
763 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_80, buf, SCSI_INQ_BUFF_LEN);
767 if (buf[1] != PAGE_80) {
768 info(udev, "%s: Invalid page 0x80\n", dev_scsi->kernel);
772 len = 1 + VENDOR_LENGTH + MODEL_LENGTH + buf[3];
774 info(udev, "%s: length %d too short - need %d\n",
775 dev_scsi->kernel, max_len, len);
779 * Prepend 'S' to avoid unlikely collision with page 0x83 vendor
780 * specific type where we prepend '0' + vendor + model.
783 ser_ind = prepend_vendor_model(udev, dev_scsi, &serial[1]);
787 for (i = 4; i < len + 4; i++, ser_ind++)
788 serial[ser_ind] = buf[i];
789 memcpy(serial_short, &buf[4], len);
790 serial_short[len] = '\0';
794 int scsi_std_inquiry(struct udev *udev,
795 struct scsi_id_device *dev_scsi, const char *devname)
798 unsigned char buf[SCSI_INQ_BUFF_LEN];
802 dbg(udev, "opening %s\n", devname);
803 fd = open(devname, O_RDONLY | O_NONBLOCK);
805 info(udev, "scsi_id: cannot open %s: %s\n",
806 devname, strerror(errno));
810 if (fstat(fd, &statbuf) < 0) {
811 info(udev, "scsi_id: cannot stat %s: %s\n",
812 devname, strerror(errno));
816 sprintf(dev_scsi->kernel,"%d:%d", major(statbuf.st_rdev),
817 minor(statbuf.st_rdev));
819 memset(buf, 0, SCSI_INQ_BUFF_LEN);
820 err = scsi_inquiry(udev, dev_scsi, fd, 0, 0, buf, SCSI_INQ_BUFF_LEN);
825 memcpy(dev_scsi->vendor, buf + 8, 8);
826 dev_scsi->vendor[8] = '\0';
827 memcpy(dev_scsi->model, buf + 16, 16);
828 dev_scsi->model[16] = '\0';
829 memcpy(dev_scsi->revision, buf + 32, 4);
830 dev_scsi->revision[4] = '\0';
831 sprintf(dev_scsi->type,"%x", buf[0] & 0x1f);
838 int scsi_get_serial(struct udev *udev,
839 struct scsi_id_device *dev_scsi, const char *devname,
840 int page_code, int len)
842 unsigned char page0[SCSI_INQ_BUFF_LEN];
848 memset(dev_scsi->serial, 0, len);
849 dbg(udev, "opening %s\n", devname);
851 fd = open(devname, O_RDONLY | O_NONBLOCK);
854 info(udev, "%s: cannot open %s: %s\n", dev_scsi->kernel, devname, strerror(errno));
857 usleep(500000 + (rand() % 100000) );
862 if (page_code == PAGE_80) {
863 if (do_scsi_page80_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) {
870 } else if (page_code == PAGE_83) {
871 if (do_scsi_page83_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) {
878 } else if (page_code == PAGE_83_PRE_SPC3) {
879 retval = do_scsi_page83_prespc3_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len);
882 * Fallback to servicing a SPC-2/3 compliant page 83
883 * inquiry if the page 83 reply format does not
884 * conform to pre-SPC3 expectations.
887 if (do_scsi_page83_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) {
903 } else if (page_code != 0x00) {
904 info(udev, "%s: unsupported page code 0x%d\n", dev_scsi->kernel, page_code);
909 * Get page 0, the page of the pages. By default, try from best to
910 * worst of supported pages: 0x83 then 0x80.
912 if (do_scsi_page0_inquiry(udev, dev_scsi, fd, page0, SCSI_INQ_BUFF_LEN)) {
914 * Don't try anything else. Black list if a specific page
915 * should be used for this vendor+model, or maybe have an
916 * optional fall-back to page 0x80 or page 0x83.
922 dbg(udev, "%s: Checking page0\n", dev_scsi->kernel);
924 for (ind = 4; ind <= page0[3] + 3; ind++)
925 if (page0[ind] == PAGE_83)
926 if (!do_scsi_page83_inquiry(udev, dev_scsi, fd,
927 dev_scsi->serial, dev_scsi->serial_short, len)) {
935 for (ind = 4; ind <= page0[3] + 3; ind++)
936 if (page0[ind] == PAGE_80)
937 if (!do_scsi_page80_inquiry(udev, dev_scsi, fd,
938 dev_scsi->serial, dev_scsi->serial_short, len)) {