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>
28 #include <scsi/scsi.h>
30 #include <linux/types.h>
31 /* #include <linux/bsg.h> */
35 #include "libudev-private.h"
40 * A priority based list of id, naa, and binary/ascii for the identifier
41 * descriptor in VPD page 0x83.
43 * Brute force search for a match starting with the first value in the
44 * following id_search_list. This is not a performance issue, since there
45 * is normally one or some small number of descriptors.
47 static const struct scsi_id_search_values id_search_list[] = {
48 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG_EXTENDED, SCSI_ID_BINARY },
49 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG_EXTENDED, SCSI_ID_ASCII },
50 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG, SCSI_ID_BINARY },
51 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG, SCSI_ID_ASCII },
53 * Devices already exist using NAA values that are now marked
54 * reserved. These should not conflict with other values, or it is
55 * a bug in the device. As long as we find the IEEE extended one
56 * first, we really don't care what other ones are used. Using
57 * don't care here means that a device that returns multiple
58 * non-IEEE descriptors in a random order will get different
61 { SCSI_ID_NAA, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
62 { SCSI_ID_NAA, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
63 { SCSI_ID_EUI_64, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
64 { SCSI_ID_EUI_64, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
65 { SCSI_ID_T10_VENDOR, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
66 { SCSI_ID_T10_VENDOR, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
67 { SCSI_ID_VENDOR_SPECIFIC, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
68 { SCSI_ID_VENDOR_SPECIFIC, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
71 static const char hex_str[]="0123456789abcdef";
74 * Values returned in the result/status, only the ones used by the code
78 #define DID_NO_CONNECT 0x01 /* Unable to connect before timeout */
79 #define DID_BUS_BUSY 0x02 /* Bus remain busy until timeout */
80 #define DID_TIME_OUT 0x03 /* Timed out for some other reason */
81 #define DRIVER_TIMEOUT 0x06
82 #define DRIVER_SENSE 0x08 /* Sense_buffer has been set */
84 /* The following "category" function returns one of the following */
85 #define SG_ERR_CAT_CLEAN 0 /* No errors or other information */
86 #define SG_ERR_CAT_MEDIA_CHANGED 1 /* interpreted from sense buffer */
87 #define SG_ERR_CAT_RESET 2 /* interpreted from sense buffer */
88 #define SG_ERR_CAT_TIMEOUT 3
89 #define SG_ERR_CAT_RECOVERED 4 /* Successful command after recovered err */
90 #define SG_ERR_CAT_NOTSUPPORTED 5 /* Illegal / unsupported command */
91 #define SG_ERR_CAT_SENSE 98 /* Something else in the sense buffer */
92 #define SG_ERR_CAT_OTHER 99 /* Some other error/warning */
94 static int sg_err_category_new(struct udev *udev,
95 int scsi_status, int msg_status, int
96 host_status, int driver_status, const
97 unsigned char *sense_buffer, int sb_len)
102 * XXX change to return only two values - failed or OK.
105 if (!scsi_status && !host_status && !driver_status)
106 return SG_ERR_CAT_CLEAN;
108 if ((scsi_status == SCSI_CHECK_CONDITION) ||
109 (scsi_status == SCSI_COMMAND_TERMINATED) ||
110 ((driver_status & 0xf) == DRIVER_SENSE)) {
111 if (sense_buffer && (sb_len > 2)) {
115 if (sense_buffer[0] & 0x2) {
116 sense_key = sense_buffer[1] & 0xf;
117 asc = sense_buffer[2];
119 sense_key = sense_buffer[2] & 0xf;
120 asc = (sb_len > 12) ? sense_buffer[12] : 0;
123 if (sense_key == RECOVERED_ERROR)
124 return SG_ERR_CAT_RECOVERED;
125 else if (sense_key == UNIT_ATTENTION) {
127 return SG_ERR_CAT_MEDIA_CHANGED;
129 return SG_ERR_CAT_RESET;
130 } else if (sense_key == ILLEGAL_REQUEST) {
131 return SG_ERR_CAT_NOTSUPPORTED;
134 return SG_ERR_CAT_SENSE;
137 if ((host_status == DID_NO_CONNECT) ||
138 (host_status == DID_BUS_BUSY) ||
139 (host_status == DID_TIME_OUT))
140 return SG_ERR_CAT_TIMEOUT;
142 if (!driver_status) {
143 if (driver_status == DRIVER_TIMEOUT)
144 return SG_ERR_CAT_TIMEOUT;
146 return SG_ERR_CAT_OTHER;
149 static int sg_err_category3(struct udev *udev, struct sg_io_hdr *hp)
151 return sg_err_category_new(udev,
152 hp->status, hp->msg_status,
153 hp->host_status, hp->driver_status,
154 hp->sbp, hp->sb_len_wr);
157 static int sg_err_category4(struct udev *udev, struct sg_io_v4 *hp)
159 return sg_err_category_new(udev, hp->device_status, 0,
160 hp->transport_status, hp->driver_status,
161 (unsigned char *)(uintptr_t)hp->response,
165 static int scsi_dump_sense(struct udev *udev,
166 struct scsi_id_device *dev_scsi,
167 unsigned char *sense_buffer, int sb_len)
175 char out_buffer[256];
180 * Figure out and print the sense key, asc and ascq.
182 * If you want to suppress these for a particular drive model, add
183 * a black list entry in the scsi_id config file.
185 * XXX We probably need to: lookup the sense/asc/ascq in a retry
186 * table, and if found return 1 (after dumping the sense, asc, and
187 * ascq). So, if/when we get something like a power on/reset,
188 * we'll retry the command.
191 dbg(udev, "got check condition\n");
194 info(udev, "%s: sense buffer empty\n", dev_scsi->kernel);
198 sense_class = (sense_buffer[0] >> 4) & 0x07;
199 code = sense_buffer[0] & 0xf;
201 if (sense_class == 7) {
203 * extended sense data.
205 s = sense_buffer[7] + 8;
207 info(udev, "%s: sense buffer too small %d bytes, %d bytes too short\n",
208 dev_scsi->kernel, sb_len, s - sb_len);
211 if ((code == 0x0) || (code == 0x1)) {
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 sense_key = sense_buffer[1] & 0xf;
225 asc = sense_buffer[2];
226 ascq = sense_buffer[3];
228 info(udev, "%s: invalid sense code 0x%x\n",
229 dev_scsi->kernel, code);
232 info(udev, "%s: sense key 0x%x ASC 0x%x ASCQ 0x%x\n",
233 dev_scsi->kernel, sense_key, asc, ascq);
236 info(udev, "%s: sense buffer too small %d bytes, %d bytes too short\n",
237 dev_scsi->kernel, sb_len, 4 - sb_len);
241 if (sense_buffer[0] < 15)
242 info(udev, "%s: old sense key: 0x%x\n", dev_scsi->kernel, sense_buffer[0] & 0x0f);
244 info(udev, "%s: sense = %2x %2x\n",
245 dev_scsi->kernel, sense_buffer[0], sense_buffer[2]);
246 info(udev, "%s: non-extended sense class %d code 0x%0x\n",
247 dev_scsi->kernel, sense_class, code);
252 for (i = 0, j = 0; (i < s) && (j < 254); i++) {
253 dbg(udev, "i %d, j %d\n", i, j);
254 out_buffer[j++] = hex_str[(sense_buffer[i] & 0xf0) >> 4];
255 out_buffer[j++] = hex_str[sense_buffer[i] & 0x0f];
256 out_buffer[j++] = ' ';
258 out_buffer[j] = '\0';
259 info(udev, "%s: sense dump:\n", dev_scsi->kernel);
260 info(udev, "%s: %s\n", dev_scsi->kernel, out_buffer);
266 static int scsi_dump(struct udev *udev,
267 struct scsi_id_device *dev_scsi, struct sg_io_hdr *io)
269 if (!io->status && !io->host_status && !io->msg_status &&
270 !io->driver_status) {
272 * Impossible, should not be called.
274 info(udev, "%s: called with no error\n", __FUNCTION__);
278 info(udev, "%s: sg_io failed status 0x%x 0x%x 0x%x 0x%x\n",
279 dev_scsi->kernel, io->driver_status, io->host_status, io->msg_status, io->status);
280 if (io->status == SCSI_CHECK_CONDITION)
281 return scsi_dump_sense(udev, dev_scsi, io->sbp, io->sb_len_wr);
286 static int scsi_dump_v4(struct udev *udev,
287 struct scsi_id_device *dev_scsi, struct sg_io_v4 *io)
289 if (!io->device_status && !io->transport_status &&
290 !io->driver_status) {
292 * Impossible, should not be called.
294 info(udev, "%s: called with no error\n", __FUNCTION__);
298 info(udev, "%s: sg_io failed status 0x%x 0x%x 0x%x\n",
299 dev_scsi->kernel, io->driver_status, io->transport_status,
301 if (io->device_status == SCSI_CHECK_CONDITION)
302 return scsi_dump_sense(udev, dev_scsi, (unsigned char *)(uintptr_t)io->response,
308 static int scsi_inquiry(struct udev *udev,
309 struct scsi_id_device *dev_scsi, int fd,
310 unsigned char evpd, unsigned char page,
311 unsigned char *buf, unsigned int buflen)
313 unsigned char inq_cmd[INQUIRY_CMDLEN] =
314 { INQUIRY_CMD, evpd, page, 0, buflen, 0 };
315 unsigned char sense[SENSE_BUFF_LEN];
318 int retry = 3; /* rather random */
320 if (buflen > SCSI_INQ_BUFF_LEN) {
321 info(udev, "buflen %d too long\n", buflen);
326 dbg(udev, "%s evpd %d, page 0x%x\n", dev_scsi->kernel, evpd, page);
328 if (dev_scsi->use_sg == 4) {
329 struct sg_io_v4 io_v4;
331 memset(&io_v4, 0, sizeof(struct sg_io_v4));
333 io_v4.protocol = BSG_PROTOCOL_SCSI;
334 io_v4.subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD;
335 io_v4.request_len = sizeof(inq_cmd);
336 io_v4.request = (uintptr_t)inq_cmd;
337 io_v4.max_response_len = sizeof(sense);
338 io_v4.response = (uintptr_t)sense;
339 io_v4.din_xfer_len = buflen;
340 io_v4.din_xferp = (uintptr_t)buf;
341 io_buf = (void *)&io_v4;
343 struct sg_io_hdr io_hdr;
345 memset(&io_hdr, 0, 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 info(udev, "%s: ioctl failed: %s\n", dev_scsi->kernel, strerror(errno));
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) {
393 dbg(udev, "%s: Retrying ...\n", dev_scsi->kernel);
401 info(udev, "%s: Unable to get INQUIRY vpd %d page 0x%x.\n",
402 dev_scsi->kernel, evpd, page);
407 /* Get list of supported EVPD pages */
408 static int do_scsi_page0_inquiry(struct udev *udev,
409 struct scsi_id_device *dev_scsi, int fd,
410 unsigned char *buffer, unsigned int len)
414 memset(buffer, 0, len);
415 retval = scsi_inquiry(udev, dev_scsi, fd, 1, 0x0, buffer, len);
419 if (buffer[1] != 0) {
420 info(udev, "%s: page 0 not available.\n", dev_scsi->kernel);
423 if (buffer[3] > len) {
424 info(udev, "%s: page 0 buffer too long %d\n", dev_scsi->kernel, buffer[3]);
429 * Following check is based on code once included in the 2.5.x
432 * Some ill behaved devices return the standard inquiry here
433 * rather than the evpd data, snoop the data to verify.
435 if (buffer[3] > MODEL_LENGTH) {
437 * If the vendor id appears in the page assume the page is
440 if (!strncmp((char *)&buffer[VENDOR_LENGTH], dev_scsi->vendor, VENDOR_LENGTH)) {
441 info(udev, "%s: invalid page0 data\n", dev_scsi->kernel);
449 * The caller checks that serial is long enough to include the vendor +
452 static int prepend_vendor_model(struct udev *udev,
453 struct scsi_id_device *dev_scsi, char *serial)
457 strncpy(serial, dev_scsi->vendor, VENDOR_LENGTH);
458 strncat(serial, dev_scsi->model, MODEL_LENGTH);
459 ind = strlen(serial);
462 * This is not a complete check, since we are using strncat/cpy
463 * above, ind will never be too large.
465 if (ind != (VENDOR_LENGTH + MODEL_LENGTH)) {
466 info(udev, "%s: expected length %d, got length %d\n",
467 dev_scsi->kernel, (VENDOR_LENGTH + MODEL_LENGTH), ind);
474 * check_fill_0x83_id - check the page 0x83 id, if OK allocate and fill
477 static int check_fill_0x83_id(struct udev *udev,
478 struct scsi_id_device *dev_scsi,
479 unsigned char *page_83,
480 const struct scsi_id_search_values
481 *id_search, char *serial, char *serial_short, int max_len)
486 * ASSOCIATION must be with the device (value 0)
488 if ((page_83[1] & 0x30) != 0)
491 if ((page_83[1] & 0x0f) != id_search->id_type)
495 * Possibly check NAA sub-type.
497 if ((id_search->naa_type != SCSI_ID_NAA_DONT_CARE) &&
498 (id_search->naa_type != (page_83[4] & 0xf0) >> 4))
502 * Check for matching code set - ASCII or BINARY.
504 if ((page_83[0] & 0x0f) != id_search->code_set)
508 * page_83[3]: identifier length
511 if ((page_83[0] & 0x0f) != SCSI_ID_ASCII)
513 * If not ASCII, use two bytes for each binary value.
518 * Add one byte for the NUL termination, and one for the id_type.
521 if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC)
522 len += VENDOR_LENGTH + MODEL_LENGTH;
525 info(udev, "%s: length %d too short - need %d\n",
526 dev_scsi->kernel, max_len, len);
530 serial[0] = hex_str[id_search->id_type];
533 * For SCSI_ID_VENDOR_SPECIFIC prepend the vendor and model before
534 * the id since it is not unique across all vendors and models,
535 * this differs from SCSI_ID_T10_VENDOR, where the vendor is
536 * included in the identifier.
538 if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC)
539 if (prepend_vendor_model(udev, dev_scsi, &serial[1]) < 0) {
540 dbg(udev, "prepend failed\n");
544 i = 4; /* offset to the start of the identifier */
545 s = j = strlen(serial);
546 if ((page_83[0] & 0x0f) == SCSI_ID_ASCII) {
550 while (i < (4 + page_83[3]))
551 serial[j++] = page_83[i++];
554 * Binary descriptor, convert to ASCII, using two bytes of
555 * ASCII for each byte in the page_83.
557 while (i < (4 + page_83[3])) {
558 serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4];
559 serial[j++] = hex_str[page_83[i] & 0x0f];
564 strcpy(serial_short, &serial[s]);
568 /* Extract the raw binary from VPD 0x83 pre-SPC devices */
569 static int check_fill_0x83_prespc3(struct udev *udev,
570 struct scsi_id_device *dev_scsi,
571 unsigned char *page_83,
572 const struct scsi_id_search_values
573 *id_search, char *serial, char *serial_short, int max_len)
577 dbg(udev, "using pre-spc3-83 for %s\n", dev_scsi->kernel);
578 serial[0] = hex_str[id_search->id_type];
579 /* serial has been memset to zero before */
580 j = strlen(serial); /* j = 1; */
582 for (i = 0; i < page_83[3]; ++i) {
583 serial[j++] = hex_str[(page_83[4+i] & 0xf0) >> 4];
584 serial[j++] = hex_str[ page_83[4+i] & 0x0f];
586 strcpy(serial_short, serial);
591 /* Get device identification VPD page */
592 static int do_scsi_page83_inquiry(struct udev *udev,
593 struct scsi_id_device *dev_scsi, int fd,
594 char *serial, char *serial_short, int len)
597 unsigned int id_ind, j;
598 unsigned char page_83[SCSI_INQ_BUFF_LEN];
600 memset(page_83, 0, SCSI_INQ_BUFF_LEN);
601 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83,
606 if (page_83[1] != PAGE_83) {
607 info(udev, "%s: Invalid page 0x83\n", dev_scsi->kernel);
612 * XXX Some devices (IBM 3542) return all spaces for an identifier if
613 * the LUN is not actually configured. This leads to identifiers of
618 * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
619 * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
621 * The SCSI-2 page 83 format returns an IEEE WWN in binary
622 * encoded hexi-decimal in the 16 bytes following the initial
623 * 4-byte page 83 reply header.
625 * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
626 * of an Identification descriptor. The 3rd byte of the first
627 * Identification descriptor is a reserved (BSZ) byte field.
629 * Reference the 7th byte of the page 83 reply to determine
630 * whether the reply is compliant with SCSI-2 or SPC-2/3
631 * specifications. A zero value in the 7th byte indicates
632 * an SPC-2/3 conformant reply, (i.e., the reserved field of the
633 * first Identification descriptor). This byte will be non-zero
634 * for a SCSI-2 conformant page 83 reply from these EMC
635 * Symmetrix models since the 7th byte of the reply corresponds
636 * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
641 return check_fill_0x83_prespc3(udev,
642 dev_scsi, page_83, id_search_list,
643 serial, serial_short, len);
646 * Search for a match in the prioritized id_search_list.
649 id_ind < sizeof(id_search_list)/sizeof(id_search_list[0]);
652 * Examine each descriptor returned. There is normally only
653 * one or a small number of descriptors.
655 for (j = 4; j <= (unsigned int)page_83[3] + 3; j += page_83[j + 3] + 4) {
656 retval = check_fill_0x83_id(udev,
657 dev_scsi, &page_83[j],
658 &id_search_list[id_ind],
659 serial, serial_short, len);
660 dbg(udev, "%s id desc %d/%d/%d\n", dev_scsi->kernel,
661 id_search_list[id_ind].id_type,
662 id_search_list[id_ind].naa_type,
663 id_search_list[id_ind].code_set);
665 dbg(udev, " used\n");
667 } else if (retval < 0) {
668 dbg(udev, " failed\n");
671 dbg(udev, " not used\n");
679 * Get device identification VPD page for older SCSI-2 device which is not
680 * compliant with either SPC-2 or SPC-3 format.
682 * Return the hard coded error code value 2 if the page 83 reply is not
683 * conformant to the SCSI-2 format.
685 static int do_scsi_page83_prespc3_inquiry(struct udev *udev,
686 struct scsi_id_device *dev_scsi, int fd,
687 char *serial, char *serial_short, int len)
691 unsigned char page_83[SCSI_INQ_BUFF_LEN];
693 memset(page_83, 0, SCSI_INQ_BUFF_LEN);
694 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83, SCSI_INQ_BUFF_LEN);
698 if (page_83[1] != PAGE_83) {
699 info(udev, "%s: Invalid page 0x83\n", dev_scsi->kernel);
703 * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
704 * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
706 * The SCSI-2 page 83 format returns an IEEE WWN in binary
707 * encoded hexi-decimal in the 16 bytes following the initial
708 * 4-byte page 83 reply header.
710 * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
711 * of an Identification descriptor. The 3rd byte of the first
712 * Identification descriptor is a reserved (BSZ) byte field.
714 * Reference the 7th byte of the page 83 reply to determine
715 * whether the reply is compliant with SCSI-2 or SPC-2/3
716 * specifications. A zero value in the 7th byte indicates
717 * an SPC-2/3 conformant reply, (i.e., the reserved field of the
718 * first Identification descriptor). This byte will be non-zero
719 * for a SCSI-2 conformant page 83 reply from these EMC
720 * Symmetrix models since the 7th byte of the reply corresponds
721 * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
727 serial[0] = hex_str[id_search_list[0].id_type];
729 * The first four bytes contain data, not a descriptor.
734 * Binary descriptor, convert to ASCII,
735 * using two bytes of ASCII for each byte
738 while (i < (page_83[3]+4)) {
739 serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4];
740 serial[j++] = hex_str[page_83[i] & 0x0f];
743 dbg(udev, "using pre-spc3-83 for %s\n", dev_scsi->kernel);
747 /* Get unit serial number VPD page */
748 static int do_scsi_page80_inquiry(struct udev *udev,
749 struct scsi_id_device *dev_scsi, int fd,
750 char *serial, char *serial_short, int max_len)
756 unsigned char buf[SCSI_INQ_BUFF_LEN];
758 memset(buf, 0, SCSI_INQ_BUFF_LEN);
759 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_80, buf, SCSI_INQ_BUFF_LEN);
763 if (buf[1] != PAGE_80) {
764 info(udev, "%s: Invalid page 0x80\n", dev_scsi->kernel);
768 len = 1 + VENDOR_LENGTH + MODEL_LENGTH + buf[3];
770 info(udev, "%s: length %d too short - need %d\n",
771 dev_scsi->kernel, max_len, len);
775 * Prepend 'S' to avoid unlikely collision with page 0x83 vendor
776 * specific type where we prepend '0' + vendor + model.
779 ser_ind = prepend_vendor_model(udev, dev_scsi, &serial[1]);
783 for (i = 4; i < len + 4; i++, ser_ind++)
784 serial[ser_ind] = buf[i];
785 memcpy(serial_short, &buf[4], len);
786 serial_short[len] = '\0';
790 int scsi_std_inquiry(struct udev *udev,
791 struct scsi_id_device *dev_scsi, const char *devname)
794 unsigned char buf[SCSI_INQ_BUFF_LEN];
798 dbg(udev, "opening %s\n", devname);
799 fd = open(devname, O_RDONLY | O_NONBLOCK);
801 info(udev, "scsi_id: cannot open %s: %s\n",
802 devname, strerror(errno));
806 if (fstat(fd, &statbuf) < 0) {
807 info(udev, "scsi_id: cannot stat %s: %s\n",
808 devname, strerror(errno));
812 sprintf(dev_scsi->kernel,"%d:%d", major(statbuf.st_rdev),
813 minor(statbuf.st_rdev));
815 memset(buf, 0, SCSI_INQ_BUFF_LEN);
816 err = scsi_inquiry(udev, dev_scsi, fd, 0, 0, buf, SCSI_INQ_BUFF_LEN);
821 memcpy(dev_scsi->vendor, buf + 8, 8);
822 dev_scsi->vendor[8] = '\0';
823 memcpy(dev_scsi->model, buf + 16, 16);
824 dev_scsi->model[16] = '\0';
825 memcpy(dev_scsi->revision, buf + 32, 4);
826 dev_scsi->revision[4] = '\0';
827 sprintf(dev_scsi->type,"%x", buf[0] & 0x1f);
834 int scsi_get_serial(struct udev *udev,
835 struct scsi_id_device *dev_scsi, const char *devname,
836 int page_code, int len)
838 unsigned char page0[SCSI_INQ_BUFF_LEN];
844 memset(dev_scsi->serial, 0, len);
845 dbg(udev, "opening %s\n", devname);
847 const struct timespec duration = { 0, 500 * 1000 * 1000 };
849 fd = open(devname, O_RDONLY | O_NONBLOCK);
852 info(udev, "%s: cannot open %s: %s\n", dev_scsi->kernel, devname, strerror(errno));
855 nanosleep(&duration, NULL);
860 if (page_code == PAGE_80) {
861 if (do_scsi_page80_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) {
868 } else if (page_code == PAGE_83) {
869 if (do_scsi_page83_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) {
876 } else if (page_code == PAGE_83_PRE_SPC3) {
877 retval = do_scsi_page83_prespc3_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len);
880 * Fallback to servicing a SPC-2/3 compliant page 83
881 * inquiry if the page 83 reply format does not
882 * conform to pre-SPC3 expectations.
885 if (do_scsi_page83_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) {
901 } else if (page_code != 0x00) {
902 info(udev, "%s: unsupported page code 0x%d\n", dev_scsi->kernel, page_code);
907 * Get page 0, the page of the pages. By default, try from best to
908 * worst of supported pages: 0x83 then 0x80.
910 if (do_scsi_page0_inquiry(udev, dev_scsi, fd, page0, SCSI_INQ_BUFF_LEN)) {
912 * Don't try anything else. Black list if a specific page
913 * should be used for this vendor+model, or maybe have an
914 * optional fall-back to page 0x80 or page 0x83.
920 dbg(udev, "%s: Checking page0\n", dev_scsi->kernel);
922 for (ind = 4; ind <= page0[3] + 3; ind++)
923 if (page0[ind] == PAGE_83)
924 if (!do_scsi_page83_inquiry(udev, dev_scsi, fd,
925 dev_scsi->serial, dev_scsi->serial_short, len)) {
933 for (ind = 4; ind <= page0[3] + 3; ind++)
934 if (page0[ind] == PAGE_80)
935 if (!do_scsi_page80_inquiry(udev, dev_scsi, fd,
936 dev_scsi->serial, dev_scsi->serial_short, len)) {