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)
173 int descriptor_format;
176 char out_buffer[256];
181 * Figure out and print the sense key, asc and ascq.
183 * If you want to suppress these for a particular drive model, add
184 * a black list entry in the scsi_id config file.
186 * XXX We probably need to: lookup the sense/asc/ascq in a retry
187 * table, and if found return 1 (after dumping the sense, asc, and
188 * ascq). So, if/when we get something like a power on/reset,
189 * we'll retry the command.
192 dbg(udev, "got check condition\n");
195 info(udev, "%s: sense buffer empty\n", dev_scsi->kernel);
199 sense_class = (sense_buffer[0] >> 4) & 0x07;
200 code = sense_buffer[0] & 0xf;
202 if (sense_class == 7) {
204 * extended sense data.
206 s = sense_buffer[7] + 8;
208 info(udev, "%s: sense buffer too small %d bytes, %d bytes too short\n",
209 dev_scsi->kernel, sb_len, s - sb_len);
212 if ((code == 0x0) || (code == 0x1)) {
213 descriptor_format = 0;
214 sense_key = sense_buffer[2] & 0xf;
219 info(udev, "%s: sense result too" " small %d bytes\n",
220 dev_scsi->kernel, s);
223 asc = sense_buffer[12];
224 ascq = sense_buffer[13];
225 } else if ((code == 0x2) || (code == 0x3)) {
226 descriptor_format = 1;
227 sense_key = sense_buffer[1] & 0xf;
228 asc = sense_buffer[2];
229 ascq = sense_buffer[3];
231 info(udev, "%s: invalid sense code 0x%x\n",
232 dev_scsi->kernel, code);
235 info(udev, "%s: sense key 0x%x ASC 0x%x ASCQ 0x%x\n",
236 dev_scsi->kernel, sense_key, asc, ascq);
239 info(udev, "%s: sense buffer too small %d bytes, %d bytes too short\n",
240 dev_scsi->kernel, sb_len, 4 - sb_len);
244 if (sense_buffer[0] < 15)
245 info(udev, "%s: old sense key: 0x%x\n", dev_scsi->kernel, sense_buffer[0] & 0x0f);
247 info(udev, "%s: sense = %2x %2x\n",
248 dev_scsi->kernel, sense_buffer[0], sense_buffer[2]);
249 info(udev, "%s: non-extended sense class %d code 0x%0x\n",
250 dev_scsi->kernel, sense_class, code);
255 for (i = 0, j = 0; (i < s) && (j < 254); i++) {
256 dbg(udev, "i %d, j %d\n", i, j);
257 out_buffer[j++] = hex_str[(sense_buffer[i] & 0xf0) >> 4];
258 out_buffer[j++] = hex_str[sense_buffer[i] & 0x0f];
259 out_buffer[j++] = ' ';
261 out_buffer[j] = '\0';
262 info(udev, "%s: sense dump:\n", dev_scsi->kernel);
263 info(udev, "%s: %s\n", dev_scsi->kernel, out_buffer);
269 static int scsi_dump(struct udev *udev,
270 struct scsi_id_device *dev_scsi, struct sg_io_hdr *io)
272 if (!io->status && !io->host_status && !io->msg_status &&
273 !io->driver_status) {
275 * Impossible, should not be called.
277 info(udev, "%s: called with no error\n", __FUNCTION__);
281 info(udev, "%s: sg_io failed status 0x%x 0x%x 0x%x 0x%x\n",
282 dev_scsi->kernel, io->driver_status, io->host_status, io->msg_status, io->status);
283 if (io->status == SCSI_CHECK_CONDITION)
284 return scsi_dump_sense(udev, dev_scsi, io->sbp, io->sb_len_wr);
289 static int scsi_dump_v4(struct udev *udev,
290 struct scsi_id_device *dev_scsi, struct sg_io_v4 *io)
292 if (!io->device_status && !io->transport_status &&
293 !io->driver_status) {
295 * Impossible, should not be called.
297 info(udev, "%s: called with no error\n", __FUNCTION__);
301 info(udev, "%s: sg_io failed status 0x%x 0x%x 0x%x\n",
302 dev_scsi->kernel, io->driver_status, io->transport_status,
304 if (io->device_status == SCSI_CHECK_CONDITION)
305 return scsi_dump_sense(udev, dev_scsi, (unsigned char *)(uintptr_t)io->response,
311 static int scsi_inquiry(struct udev *udev,
312 struct scsi_id_device *dev_scsi, int fd,
313 unsigned char evpd, unsigned char page,
314 unsigned char *buf, unsigned int buflen)
316 unsigned char inq_cmd[INQUIRY_CMDLEN] =
317 { INQUIRY_CMD, evpd, page, 0, buflen, 0 };
318 unsigned char sense[SENSE_BUFF_LEN];
321 int retry = 3; /* rather random */
323 if (buflen > SCSI_INQ_BUFF_LEN) {
324 info(udev, "buflen %d too long\n", buflen);
329 dbg(udev, "%s evpd %d, page 0x%x\n", dev_scsi->kernel, evpd, page);
331 if (dev_scsi->use_sg == 4) {
332 struct sg_io_v4 io_v4;
334 memset(&io_v4, 0, sizeof(struct sg_io_v4));
336 io_v4.protocol = BSG_PROTOCOL_SCSI;
337 io_v4.subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD;
338 io_v4.request_len = sizeof(inq_cmd);
339 io_v4.request = (uintptr_t)inq_cmd;
340 io_v4.max_response_len = sizeof(sense);
341 io_v4.response = (uintptr_t)sense;
342 io_v4.din_xfer_len = buflen;
343 io_v4.din_xferp = (uintptr_t)buf;
344 io_buf = (void *)&io_v4;
346 struct sg_io_hdr io_hdr;
348 memset(&io_hdr, 0, sizeof(struct sg_io_hdr));
349 io_hdr.interface_id = 'S';
350 io_hdr.cmd_len = sizeof(inq_cmd);
351 io_hdr.mx_sb_len = sizeof(sense);
352 io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
353 io_hdr.dxfer_len = buflen;
355 io_hdr.cmdp = inq_cmd;
357 io_hdr.timeout = DEF_TIMEOUT;
358 io_buf = (void *)&io_hdr;
361 retval = ioctl(fd, SG_IO, io_buf);
363 if ((errno == EINVAL || errno == ENOSYS) && dev_scsi->use_sg == 4) {
364 dev_scsi->use_sg = 3;
367 info(udev, "%s: ioctl failed: %s\n", dev_scsi->kernel, strerror(errno));
371 if (dev_scsi->use_sg == 4)
372 retval = sg_err_category4(udev, io_buf);
374 retval = sg_err_category3(udev, io_buf);
377 case SG_ERR_CAT_NOTSUPPORTED:
380 case SG_ERR_CAT_CLEAN:
381 case SG_ERR_CAT_RECOVERED:
386 if (dev_scsi->use_sg == 4)
387 retval = scsi_dump_v4(udev, dev_scsi, io_buf);
389 retval = scsi_dump(udev, dev_scsi, io_buf);
394 } else if (retval > 0) {
396 dbg(udev, "%s: Retrying ...\n", dev_scsi->kernel);
404 info(udev, "%s: Unable to get INQUIRY vpd %d page 0x%x.\n",
405 dev_scsi->kernel, evpd, page);
410 /* Get list of supported EVPD pages */
411 static int do_scsi_page0_inquiry(struct udev *udev,
412 struct scsi_id_device *dev_scsi, int fd,
413 unsigned char *buffer, unsigned int len)
417 memset(buffer, 0, len);
418 retval = scsi_inquiry(udev, dev_scsi, fd, 1, 0x0, buffer, len);
422 if (buffer[1] != 0) {
423 info(udev, "%s: page 0 not available.\n", dev_scsi->kernel);
426 if (buffer[3] > len) {
427 info(udev, "%s: page 0 buffer too long %d\n", dev_scsi->kernel, buffer[3]);
432 * Following check is based on code once included in the 2.5.x
435 * Some ill behaved devices return the standard inquiry here
436 * rather than the evpd data, snoop the data to verify.
438 if (buffer[3] > MODEL_LENGTH) {
440 * If the vendor id appears in the page assume the page is
443 if (!strncmp((char *)&buffer[VENDOR_LENGTH], dev_scsi->vendor, VENDOR_LENGTH)) {
444 info(udev, "%s: invalid page0 data\n", dev_scsi->kernel);
452 * The caller checks that serial is long enough to include the vendor +
455 static int prepend_vendor_model(struct udev *udev,
456 struct scsi_id_device *dev_scsi, char *serial)
460 strncpy(serial, dev_scsi->vendor, VENDOR_LENGTH);
461 strncat(serial, dev_scsi->model, MODEL_LENGTH);
462 ind = strlen(serial);
465 * This is not a complete check, since we are using strncat/cpy
466 * above, ind will never be too large.
468 if (ind != (VENDOR_LENGTH + MODEL_LENGTH)) {
469 info(udev, "%s: expected length %d, got length %d\n",
470 dev_scsi->kernel, (VENDOR_LENGTH + MODEL_LENGTH), ind);
477 * check_fill_0x83_id - check the page 0x83 id, if OK allocate and fill
480 static int check_fill_0x83_id(struct udev *udev,
481 struct scsi_id_device *dev_scsi,
482 unsigned char *page_83,
483 const struct scsi_id_search_values
484 *id_search, char *serial, char *serial_short, int max_len)
489 * ASSOCIATION must be with the device (value 0)
491 if ((page_83[1] & 0x30) != 0)
494 if ((page_83[1] & 0x0f) != id_search->id_type)
498 * Possibly check NAA sub-type.
500 if ((id_search->naa_type != SCSI_ID_NAA_DONT_CARE) &&
501 (id_search->naa_type != (page_83[4] & 0xf0) >> 4))
505 * Check for matching code set - ASCII or BINARY.
507 if ((page_83[0] & 0x0f) != id_search->code_set)
511 * page_83[3]: identifier length
514 if ((page_83[0] & 0x0f) != SCSI_ID_ASCII)
516 * If not ASCII, use two bytes for each binary value.
521 * Add one byte for the NUL termination, and one for the id_type.
524 if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC)
525 len += VENDOR_LENGTH + MODEL_LENGTH;
528 info(udev, "%s: length %d too short - need %d\n",
529 dev_scsi->kernel, max_len, len);
533 serial[0] = hex_str[id_search->id_type];
536 * For SCSI_ID_VENDOR_SPECIFIC prepend the vendor and model before
537 * the id since it is not unique across all vendors and models,
538 * this differs from SCSI_ID_T10_VENDOR, where the vendor is
539 * included in the identifier.
541 if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC)
542 if (prepend_vendor_model(udev, dev_scsi, &serial[1]) < 0) {
543 dbg(udev, "prepend failed\n");
547 i = 4; /* offset to the start of the identifier */
548 s = j = strlen(serial);
549 if ((page_83[0] & 0x0f) == SCSI_ID_ASCII) {
553 while (i < (4 + page_83[3]))
554 serial[j++] = page_83[i++];
557 * Binary descriptor, convert to ASCII, using two bytes of
558 * ASCII for each byte in the page_83.
560 while (i < (4 + page_83[3])) {
561 serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4];
562 serial[j++] = hex_str[page_83[i] & 0x0f];
567 strcpy(serial_short, &serial[s]);
571 /* Extract the raw binary from VPD 0x83 pre-SPC devices */
572 static int check_fill_0x83_prespc3(struct udev *udev,
573 struct scsi_id_device *dev_scsi,
574 unsigned char *page_83,
575 const struct scsi_id_search_values
576 *id_search, char *serial, char *serial_short, int max_len)
580 dbg(udev, "using pre-spc3-83 for %s\n", dev_scsi->kernel);
581 serial[0] = hex_str[id_search->id_type];
582 /* serial has been memset to zero before */
583 j = strlen(serial); /* j = 1; */
585 for (i = 0; i < page_83[3]; ++i) {
586 serial[j++] = hex_str[(page_83[4+i] & 0xf0) >> 4];
587 serial[j++] = hex_str[ page_83[4+i] & 0x0f];
589 strcpy(serial_short, serial);
594 /* Get device identification VPD page */
595 static int do_scsi_page83_inquiry(struct udev *udev,
596 struct scsi_id_device *dev_scsi, int fd,
597 char *serial, char *serial_short, int len)
600 unsigned int id_ind, j;
601 unsigned char page_83[SCSI_INQ_BUFF_LEN];
603 memset(page_83, 0, SCSI_INQ_BUFF_LEN);
604 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83,
609 if (page_83[1] != PAGE_83) {
610 info(udev, "%s: Invalid page 0x83\n", dev_scsi->kernel);
615 * XXX Some devices (IBM 3542) return all spaces for an identifier if
616 * the LUN is not actually configured. This leads to identifiers of
621 * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
622 * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
624 * The SCSI-2 page 83 format returns an IEEE WWN in binary
625 * encoded hexi-decimal in the 16 bytes following the initial
626 * 4-byte page 83 reply header.
628 * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
629 * of an Identification descriptor. The 3rd byte of the first
630 * Identification descriptor is a reserved (BSZ) byte field.
632 * Reference the 7th byte of the page 83 reply to determine
633 * whether the reply is compliant with SCSI-2 or SPC-2/3
634 * specifications. A zero value in the 7th byte indicates
635 * an SPC-2/3 conformant reply, (i.e., the reserved field of the
636 * first Identification descriptor). This byte will be non-zero
637 * for a SCSI-2 conformant page 83 reply from these EMC
638 * Symmetrix models since the 7th byte of the reply corresponds
639 * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
644 return check_fill_0x83_prespc3(udev,
645 dev_scsi, page_83, id_search_list,
646 serial, serial_short, len);
649 * Search for a match in the prioritized id_search_list.
652 id_ind < sizeof(id_search_list)/sizeof(id_search_list[0]);
655 * Examine each descriptor returned. There is normally only
656 * one or a small number of descriptors.
658 for (j = 4; j <= (unsigned int)page_83[3] + 3; j += page_83[j + 3] + 4) {
659 retval = check_fill_0x83_id(udev,
660 dev_scsi, &page_83[j],
661 &id_search_list[id_ind],
662 serial, serial_short, len);
663 dbg(udev, "%s id desc %d/%d/%d\n", dev_scsi->kernel,
664 id_search_list[id_ind].id_type,
665 id_search_list[id_ind].naa_type,
666 id_search_list[id_ind].code_set);
668 dbg(udev, " used\n");
670 } else if (retval < 0) {
671 dbg(udev, " failed\n");
674 dbg(udev, " not used\n");
682 * Get device identification VPD page for older SCSI-2 device which is not
683 * compliant with either SPC-2 or SPC-3 format.
685 * Return the hard coded error code value 2 if the page 83 reply is not
686 * conformant to the SCSI-2 format.
688 static int do_scsi_page83_prespc3_inquiry(struct udev *udev,
689 struct scsi_id_device *dev_scsi, int fd,
690 char *serial, char *serial_short, int len)
694 unsigned char page_83[SCSI_INQ_BUFF_LEN];
696 memset(page_83, 0, SCSI_INQ_BUFF_LEN);
697 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83, SCSI_INQ_BUFF_LEN);
701 if (page_83[1] != PAGE_83) {
702 info(udev, "%s: Invalid page 0x83\n", dev_scsi->kernel);
706 * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
707 * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
709 * The SCSI-2 page 83 format returns an IEEE WWN in binary
710 * encoded hexi-decimal in the 16 bytes following the initial
711 * 4-byte page 83 reply header.
713 * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
714 * of an Identification descriptor. The 3rd byte of the first
715 * Identification descriptor is a reserved (BSZ) byte field.
717 * Reference the 7th byte of the page 83 reply to determine
718 * whether the reply is compliant with SCSI-2 or SPC-2/3
719 * specifications. A zero value in the 7th byte indicates
720 * an SPC-2/3 conformant reply, (i.e., the reserved field of the
721 * first Identification descriptor). This byte will be non-zero
722 * for a SCSI-2 conformant page 83 reply from these EMC
723 * Symmetrix models since the 7th byte of the reply corresponds
724 * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
730 serial[0] = hex_str[id_search_list[0].id_type];
732 * The first four bytes contain data, not a descriptor.
737 * Binary descriptor, convert to ASCII,
738 * using two bytes of ASCII for each byte
741 while (i < (page_83[3]+4)) {
742 serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4];
743 serial[j++] = hex_str[page_83[i] & 0x0f];
746 dbg(udev, "using pre-spc3-83 for %s\n", dev_scsi->kernel);
750 /* Get unit serial number VPD page */
751 static int do_scsi_page80_inquiry(struct udev *udev,
752 struct scsi_id_device *dev_scsi, int fd,
753 char *serial, char *serial_short, int max_len)
759 unsigned char buf[SCSI_INQ_BUFF_LEN];
761 memset(buf, 0, SCSI_INQ_BUFF_LEN);
762 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_80, buf, SCSI_INQ_BUFF_LEN);
766 if (buf[1] != PAGE_80) {
767 info(udev, "%s: Invalid page 0x80\n", dev_scsi->kernel);
771 len = 1 + VENDOR_LENGTH + MODEL_LENGTH + buf[3];
773 info(udev, "%s: length %d too short - need %d\n",
774 dev_scsi->kernel, max_len, len);
778 * Prepend 'S' to avoid unlikely collision with page 0x83 vendor
779 * specific type where we prepend '0' + vendor + model.
782 ser_ind = prepend_vendor_model(udev, dev_scsi, &serial[1]);
786 for (i = 4; i < len + 4; i++, ser_ind++)
787 serial[ser_ind] = buf[i];
788 memcpy(serial_short, &buf[4], len);
789 serial_short[len] = '\0';
793 int scsi_std_inquiry(struct udev *udev,
794 struct scsi_id_device *dev_scsi, const char *devname)
797 unsigned char buf[SCSI_INQ_BUFF_LEN];
801 dbg(udev, "opening %s\n", devname);
802 fd = open(devname, O_RDONLY | O_NONBLOCK);
804 info(udev, "scsi_id: cannot open %s: %s\n",
805 devname, strerror(errno));
809 if (fstat(fd, &statbuf) < 0) {
810 info(udev, "scsi_id: cannot stat %s: %s\n",
811 devname, strerror(errno));
815 sprintf(dev_scsi->kernel,"%d:%d", major(statbuf.st_rdev),
816 minor(statbuf.st_rdev));
818 memset(buf, 0, SCSI_INQ_BUFF_LEN);
819 err = scsi_inquiry(udev, dev_scsi, fd, 0, 0, buf, SCSI_INQ_BUFF_LEN);
824 memcpy(dev_scsi->vendor, buf + 8, 8);
825 dev_scsi->vendor[8] = '\0';
826 memcpy(dev_scsi->model, buf + 16, 16);
827 dev_scsi->model[16] = '\0';
828 memcpy(dev_scsi->revision, buf + 32, 4);
829 dev_scsi->revision[4] = '\0';
830 sprintf(dev_scsi->type,"%x", buf[0] & 0x1f);
837 int scsi_get_serial(struct udev *udev,
838 struct scsi_id_device *dev_scsi, const char *devname,
839 int page_code, int len)
841 unsigned char page0[SCSI_INQ_BUFF_LEN];
847 memset(dev_scsi->serial, 0, len);
848 dbg(udev, "opening %s\n", devname);
850 const struct timespec duration = { 0, 500 * 1000 * 1000 };
852 fd = open(devname, O_RDONLY | O_NONBLOCK);
855 info(udev, "%s: cannot open %s: %s\n", dev_scsi->kernel, devname, strerror(errno));
858 nanosleep(&duration, NULL);
863 if (page_code == PAGE_80) {
864 if (do_scsi_page80_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) {
871 } else if (page_code == PAGE_83) {
872 if (do_scsi_page83_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) {
879 } else if (page_code == PAGE_83_PRE_SPC3) {
880 retval = do_scsi_page83_prespc3_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len);
883 * Fallback to servicing a SPC-2/3 compliant page 83
884 * inquiry if the page 83 reply format does not
885 * conform to pre-SPC3 expectations.
888 if (do_scsi_page83_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) {
904 } else if (page_code != 0x00) {
905 info(udev, "%s: unsupported page code 0x%d\n", dev_scsi->kernel, page_code);
910 * Get page 0, the page of the pages. By default, try from best to
911 * worst of supported pages: 0x83 then 0x80.
913 if (do_scsi_page0_inquiry(udev, dev_scsi, fd, page0, SCSI_INQ_BUFF_LEN)) {
915 * Don't try anything else. Black list if a specific page
916 * should be used for this vendor+model, or maybe have an
917 * optional fall-back to page 0x80 or page 0x83.
923 dbg(udev, "%s: Checking page0\n", dev_scsi->kernel);
925 for (ind = 4; ind <= page0[3] + 3; ind++)
926 if (page0[ind] == PAGE_83)
927 if (!do_scsi_page83_inquiry(udev, dev_scsi, fd,
928 dev_scsi->serial, dev_scsi->serial_short, len)) {
936 for (ind = 4; ind <= page0[3] + 3; ind++)
937 if (page0[ind] == PAGE_80)
938 if (!do_scsi_page80_inquiry(udev, dev_scsi, fd,
939 dev_scsi->serial, dev_scsi->serial_short, len)) {