1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
5 * Code related to requesting and getting an id from a scsi device
7 * Copyright (C) IBM Corp. 2003
10 * Patrick Mansfield<patmans@us.ibm.com>
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation version 2 of the License.
17 #include <sys/types.h>
18 #include <sys/ioctl.h>
29 #include <scsi/scsi.h>
31 #include <linux/types.h>
32 #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 do_scsi_page80_inquiry(struct udev *udev,
95 struct scsi_id_device *dev_scsi, int fd,
96 char *serial, char *serial_short, int max_len);
98 static int sg_err_category_new(struct udev *udev,
99 int scsi_status, int msg_status, int
100 host_status, int driver_status, const
101 unsigned char *sense_buffer, int sb_len)
106 * XXX change to return only two values - failed or OK.
109 if (!scsi_status && !host_status && !driver_status)
110 return SG_ERR_CAT_CLEAN;
112 if ((scsi_status == SCSI_CHECK_CONDITION) ||
113 (scsi_status == SCSI_COMMAND_TERMINATED) ||
114 ((driver_status & 0xf) == DRIVER_SENSE)) {
115 if (sense_buffer && (sb_len > 2)) {
119 if (sense_buffer[0] & 0x2) {
120 sense_key = sense_buffer[1] & 0xf;
121 asc = sense_buffer[2];
123 sense_key = sense_buffer[2] & 0xf;
124 asc = (sb_len > 12) ? sense_buffer[12] : 0;
127 if (sense_key == RECOVERED_ERROR)
128 return SG_ERR_CAT_RECOVERED;
129 else if (sense_key == UNIT_ATTENTION) {
131 return SG_ERR_CAT_MEDIA_CHANGED;
133 return SG_ERR_CAT_RESET;
134 } else if (sense_key == ILLEGAL_REQUEST) {
135 return SG_ERR_CAT_NOTSUPPORTED;
138 return SG_ERR_CAT_SENSE;
141 if ((host_status == DID_NO_CONNECT) ||
142 (host_status == DID_BUS_BUSY) ||
143 (host_status == DID_TIME_OUT))
144 return SG_ERR_CAT_TIMEOUT;
146 if (!driver_status) {
147 if (driver_status == DRIVER_TIMEOUT)
148 return SG_ERR_CAT_TIMEOUT;
150 return SG_ERR_CAT_OTHER;
153 static int sg_err_category3(struct udev *udev, struct sg_io_hdr *hp)
155 return sg_err_category_new(udev,
156 hp->status, hp->msg_status,
157 hp->host_status, hp->driver_status,
158 hp->sbp, hp->sb_len_wr);
161 static int sg_err_category4(struct udev *udev, struct sg_io_v4 *hp)
163 return sg_err_category_new(udev, hp->device_status, 0,
164 hp->transport_status, hp->driver_status,
165 (unsigned char *)(uintptr_t)hp->response,
169 static int scsi_dump_sense(struct udev *udev,
170 struct scsi_id_device *dev_scsi,
171 unsigned char *sense_buffer, int sb_len)
179 char out_buffer[256];
184 * Figure out and print the sense key, asc and ascq.
186 * If you want to suppress these for a particular drive model, add
187 * a black list entry in the scsi_id config file.
189 * XXX We probably need to: lookup the sense/asc/ascq in a retry
190 * table, and if found return 1 (after dumping the sense, asc, and
191 * ascq). So, if/when we get something like a power on/reset,
192 * we'll retry the command.
195 dbg(udev, "got check condition\n");
198 info(udev, "%s: sense buffer empty\n", dev_scsi->kernel);
202 sense_class = (sense_buffer[0] >> 4) & 0x07;
203 code = sense_buffer[0] & 0xf;
205 if (sense_class == 7) {
207 * extended sense data.
209 s = sense_buffer[7] + 8;
211 info(udev, "%s: sense buffer too small %d bytes, %d bytes too short\n",
212 dev_scsi->kernel, sb_len, s - sb_len);
215 if ((code == 0x0) || (code == 0x1)) {
216 sense_key = sense_buffer[2] & 0xf;
221 info(udev, "%s: sense result too" " small %d bytes\n",
222 dev_scsi->kernel, s);
225 asc = sense_buffer[12];
226 ascq = sense_buffer[13];
227 } else if ((code == 0x2) || (code == 0x3)) {
228 sense_key = sense_buffer[1] & 0xf;
229 asc = sense_buffer[2];
230 ascq = sense_buffer[3];
232 info(udev, "%s: invalid sense code 0x%x\n",
233 dev_scsi->kernel, code);
236 info(udev, "%s: sense key 0x%x ASC 0x%x ASCQ 0x%x\n",
237 dev_scsi->kernel, sense_key, asc, ascq);
240 info(udev, "%s: sense buffer too small %d bytes, %d bytes too short\n",
241 dev_scsi->kernel, sb_len, 4 - sb_len);
245 if (sense_buffer[0] < 15)
246 info(udev, "%s: old sense key: 0x%x\n", dev_scsi->kernel, sense_buffer[0] & 0x0f);
248 info(udev, "%s: sense = %2x %2x\n",
249 dev_scsi->kernel, sense_buffer[0], sense_buffer[2]);
250 info(udev, "%s: non-extended sense class %d code 0x%0x\n",
251 dev_scsi->kernel, sense_class, code);
256 for (i = 0, j = 0; (i < s) && (j < 254); i++) {
257 dbg(udev, "i %d, j %d\n", i, j);
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 info(udev, "%s: sense dump:\n", dev_scsi->kernel);
264 info(udev, "%s: %s\n", 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 info(udev, "%s: called with no error\n", __FUNCTION__);
282 info(udev, "%s: sg_io failed status 0x%x 0x%x 0x%x 0x%x\n",
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 info(udev, "%s: called with no error\n", __FUNCTION__);
302 info(udev, "%s: sg_io failed status 0x%x 0x%x 0x%x\n",
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];
322 int retry = 3; /* rather random */
324 if (buflen > SCSI_INQ_BUFF_LEN) {
325 info(udev, "buflen %d too long\n", buflen);
330 dbg(udev, "%s evpd %d, page 0x%x\n", dev_scsi->kernel, evpd, page);
332 if (dev_scsi->use_sg == 4) {
333 struct sg_io_v4 io_v4;
335 memset(&io_v4, 0, sizeof(struct sg_io_v4));
337 io_v4.protocol = BSG_PROTOCOL_SCSI;
338 io_v4.subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD;
339 io_v4.request_len = sizeof(inq_cmd);
340 io_v4.request = (uintptr_t)inq_cmd;
341 io_v4.max_response_len = sizeof(sense);
342 io_v4.response = (uintptr_t)sense;
343 io_v4.din_xfer_len = buflen;
344 io_v4.din_xferp = (uintptr_t)buf;
345 io_buf = (void *)&io_v4;
347 struct sg_io_hdr io_hdr;
349 memset(&io_hdr, 0, sizeof(struct sg_io_hdr));
350 io_hdr.interface_id = 'S';
351 io_hdr.cmd_len = sizeof(inq_cmd);
352 io_hdr.mx_sb_len = sizeof(sense);
353 io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
354 io_hdr.dxfer_len = buflen;
356 io_hdr.cmdp = inq_cmd;
358 io_hdr.timeout = DEF_TIMEOUT;
359 io_buf = (void *)&io_hdr;
362 retval = ioctl(fd, SG_IO, io_buf);
364 if ((errno == EINVAL || errno == ENOSYS) && dev_scsi->use_sg == 4) {
365 dev_scsi->use_sg = 3;
368 info(udev, "%s: ioctl failed: %s\n", dev_scsi->kernel, strerror(errno));
372 if (dev_scsi->use_sg == 4)
373 retval = sg_err_category4(udev, io_buf);
375 retval = sg_err_category3(udev, io_buf);
378 case SG_ERR_CAT_NOTSUPPORTED:
381 case SG_ERR_CAT_CLEAN:
382 case SG_ERR_CAT_RECOVERED:
387 if (dev_scsi->use_sg == 4)
388 retval = scsi_dump_v4(udev, dev_scsi, io_buf);
390 retval = scsi_dump(udev, dev_scsi, io_buf);
395 } else if (retval > 0) {
397 dbg(udev, "%s: Retrying ...\n", dev_scsi->kernel);
405 info(udev, "%s: Unable to get INQUIRY vpd %d page 0x%x.\n",
406 dev_scsi->kernel, evpd, page);
411 /* Get list of supported EVPD pages */
412 static int do_scsi_page0_inquiry(struct udev *udev,
413 struct scsi_id_device *dev_scsi, int fd,
414 unsigned char *buffer, unsigned int len)
418 memset(buffer, 0, len);
419 retval = scsi_inquiry(udev, dev_scsi, fd, 1, 0x0, buffer, len);
423 if (buffer[1] != 0) {
424 info(udev, "%s: page 0 not available.\n", dev_scsi->kernel);
427 if (buffer[3] > len) {
428 info(udev, "%s: page 0 buffer too long %d\n", dev_scsi->kernel, buffer[3]);
433 * Following check is based on code once included in the 2.5.x
436 * Some ill behaved devices return the standard inquiry here
437 * rather than the evpd data, snoop the data to verify.
439 if (buffer[3] > MODEL_LENGTH) {
441 * If the vendor id appears in the page assume the page is
444 if (!strncmp((char *)&buffer[VENDOR_LENGTH], dev_scsi->vendor, VENDOR_LENGTH)) {
445 info(udev, "%s: invalid page0 data\n", dev_scsi->kernel);
453 * The caller checks that serial is long enough to include the vendor +
456 static int prepend_vendor_model(struct udev *udev,
457 struct scsi_id_device *dev_scsi, char *serial)
461 strncpy(serial, dev_scsi->vendor, VENDOR_LENGTH);
462 strncat(serial, dev_scsi->model, MODEL_LENGTH);
463 ind = strlen(serial);
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,
487 char *wwn_vendor_extension)
492 * ASSOCIATION must be with the device (value 0)
494 if ((page_83[1] & 0x30) != 0)
497 if ((page_83[1] & 0x0f) != id_search->id_type)
501 * Possibly check NAA sub-type.
503 if ((id_search->naa_type != SCSI_ID_NAA_DONT_CARE) &&
504 (id_search->naa_type != (page_83[4] & 0xf0) >> 4))
508 * Check for matching code set - ASCII or BINARY.
510 if ((page_83[0] & 0x0f) != id_search->code_set)
514 * page_83[3]: identifier length
517 if ((page_83[0] & 0x0f) != SCSI_ID_ASCII)
519 * If not ASCII, use two bytes for each binary value.
524 * Add one byte for the NUL termination, and one for the id_type.
527 if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC)
528 len += VENDOR_LENGTH + MODEL_LENGTH;
531 info(udev, "%s: length %d too short - need %d\n",
532 dev_scsi->kernel, max_len, len);
536 serial[0] = hex_str[id_search->id_type];
539 * For SCSI_ID_VENDOR_SPECIFIC prepend the vendor and model before
540 * the id since it is not unique across all vendors and models,
541 * this differs from SCSI_ID_T10_VENDOR, where the vendor is
542 * included in the identifier.
544 if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC)
545 if (prepend_vendor_model(udev, dev_scsi, &serial[1]) < 0) {
546 dbg(udev, "prepend failed\n");
550 i = 4; /* offset to the start of the identifier */
551 s = j = strlen(serial);
552 if ((page_83[0] & 0x0f) == SCSI_ID_ASCII) {
556 while (i < (4 + page_83[3]))
557 serial[j++] = page_83[i++];
560 * Binary descriptor, convert to ASCII, using two bytes of
561 * ASCII for each byte in the page_83.
563 while (i < (4 + page_83[3])) {
564 serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4];
565 serial[j++] = hex_str[page_83[i] & 0x0f];
570 strcpy(serial_short, &serial[s]);
572 if (id_search->id_type == SCSI_ID_NAA && wwn != NULL) {
573 strncpy(wwn, &serial[s], 16);
574 if (wwn_vendor_extension != NULL) {
575 strncpy(wwn_vendor_extension, &serial[s + 16], 16);
581 /* Extract the raw binary from VPD 0x83 pre-SPC devices */
582 static int check_fill_0x83_prespc3(struct udev *udev,
583 struct scsi_id_device *dev_scsi,
584 unsigned char *page_83,
585 const struct scsi_id_search_values
586 *id_search, char *serial, char *serial_short, int max_len)
590 dbg(udev, "using pre-spc3-83 for %s\n", dev_scsi->kernel);
591 serial[0] = hex_str[id_search->id_type];
592 /* serial has been memset to zero before */
593 j = strlen(serial); /* j = 1; */
595 for (i = 0; (i < page_83[3]) && (j < max_len-3); ++i) {
596 serial[j++] = hex_str[(page_83[4+i] & 0xf0) >> 4];
597 serial[j++] = hex_str[ page_83[4+i] & 0x0f];
599 serial[max_len-1] = 0;
600 strncpy(serial_short, serial, max_len-1);
605 /* Get device identification VPD page */
606 static int do_scsi_page83_inquiry(struct udev *udev,
607 struct scsi_id_device *dev_scsi, int fd,
608 char *serial, char *serial_short, int len,
609 char *unit_serial_number, char *wwn,
610 char *wwn_vendor_extension)
613 unsigned int id_ind, j;
614 unsigned char page_83[SCSI_INQ_BUFF_LEN];
616 /* also pick up the page 80 serial number */
617 do_scsi_page80_inquiry(udev, dev_scsi, fd, NULL, unit_serial_number, MAX_SERIAL_LEN);
619 memset(page_83, 0, SCSI_INQ_BUFF_LEN);
620 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83,
625 if (page_83[1] != PAGE_83) {
626 info(udev, "%s: Invalid page 0x83\n", dev_scsi->kernel);
631 * XXX Some devices (IBM 3542) return all spaces for an identifier if
632 * the LUN is not actually configured. This leads to identifiers of
637 * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
638 * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
640 * The SCSI-2 page 83 format returns an IEEE WWN in binary
641 * encoded hexi-decimal in the 16 bytes following the initial
642 * 4-byte page 83 reply header.
644 * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
645 * of an Identification descriptor. The 3rd byte of the first
646 * Identification descriptor is a reserved (BSZ) byte field.
648 * Reference the 7th byte of the page 83 reply to determine
649 * whether the reply is compliant with SCSI-2 or SPC-2/3
650 * specifications. A zero value in the 7th byte indicates
651 * an SPC-2/3 conformant reply, (i.e., the reserved field of the
652 * first Identification descriptor). This byte will be non-zero
653 * for a SCSI-2 conformant page 83 reply from these EMC
654 * Symmetrix models since the 7th byte of the reply corresponds
655 * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
660 return check_fill_0x83_prespc3(udev,
661 dev_scsi, page_83, id_search_list,
662 serial, serial_short, len);
665 * Search for a match in the prioritized id_search_list - since WWN ids
666 * come first we can pick up the WWN in check_fill_0x83_id().
669 id_ind < sizeof(id_search_list)/sizeof(id_search_list[0]);
672 * Examine each descriptor returned. There is normally only
673 * one or a small number of descriptors.
675 for (j = 4; j <= (unsigned int)page_83[3] + 3; j += page_83[j + 3] + 4) {
676 retval = check_fill_0x83_id(udev,
677 dev_scsi, &page_83[j],
678 &id_search_list[id_ind],
679 serial, serial_short, len,
681 wwn_vendor_extension);
682 dbg(udev, "%s id desc %d/%d/%d\n", dev_scsi->kernel,
683 id_search_list[id_ind].id_type,
684 id_search_list[id_ind].naa_type,
685 id_search_list[id_ind].code_set);
687 dbg(udev, " used\n");
689 } else if (retval < 0) {
690 dbg(udev, " failed\n");
693 dbg(udev, " not used\n");
701 * Get device identification VPD page for older SCSI-2 device which is not
702 * compliant with either SPC-2 or SPC-3 format.
704 * Return the hard coded error code value 2 if the page 83 reply is not
705 * conformant to the SCSI-2 format.
707 static int do_scsi_page83_prespc3_inquiry(struct udev *udev,
708 struct scsi_id_device *dev_scsi, int fd,
709 char *serial, char *serial_short, int len)
713 unsigned char page_83[SCSI_INQ_BUFF_LEN];
715 memset(page_83, 0, SCSI_INQ_BUFF_LEN);
716 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83, SCSI_INQ_BUFF_LEN);
720 if (page_83[1] != PAGE_83) {
721 info(udev, "%s: Invalid page 0x83\n", dev_scsi->kernel);
725 * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
726 * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
728 * The SCSI-2 page 83 format returns an IEEE WWN in binary
729 * encoded hexi-decimal in the 16 bytes following the initial
730 * 4-byte page 83 reply header.
732 * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
733 * of an Identification descriptor. The 3rd byte of the first
734 * Identification descriptor is a reserved (BSZ) byte field.
736 * Reference the 7th byte of the page 83 reply to determine
737 * whether the reply is compliant with SCSI-2 or SPC-2/3
738 * specifications. A zero value in the 7th byte indicates
739 * an SPC-2/3 conformant reply, (i.e., the reserved field of the
740 * first Identification descriptor). This byte will be non-zero
741 * for a SCSI-2 conformant page 83 reply from these EMC
742 * Symmetrix models since the 7th byte of the reply corresponds
743 * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
749 serial[0] = hex_str[id_search_list[0].id_type];
751 * The first four bytes contain data, not a descriptor.
756 * Binary descriptor, convert to ASCII,
757 * using two bytes of ASCII for each byte
760 while (i < (page_83[3]+4)) {
761 serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4];
762 serial[j++] = hex_str[page_83[i] & 0x0f];
765 dbg(udev, "using pre-spc3-83 for %s\n", dev_scsi->kernel);
769 /* Get unit serial number VPD page */
770 static int do_scsi_page80_inquiry(struct udev *udev,
771 struct scsi_id_device *dev_scsi, int fd,
772 char *serial, char *serial_short, int max_len)
778 unsigned char buf[SCSI_INQ_BUFF_LEN];
780 memset(buf, 0, SCSI_INQ_BUFF_LEN);
781 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_80, buf, SCSI_INQ_BUFF_LEN);
785 if (buf[1] != PAGE_80) {
786 info(udev, "%s: Invalid page 0x80\n", dev_scsi->kernel);
790 len = 1 + VENDOR_LENGTH + MODEL_LENGTH + buf[3];
792 info(udev, "%s: length %d too short - need %d\n",
793 dev_scsi->kernel, max_len, len);
797 * Prepend 'S' to avoid unlikely collision with page 0x83 vendor
798 * specific type where we prepend '0' + vendor + model.
801 if (serial != NULL) {
803 ser_ind = prepend_vendor_model(udev, dev_scsi, &serial[1]);
806 for (i = 4; i < len + 4; i++, ser_ind++)
807 serial[ser_ind] = buf[i];
809 if (serial_short != NULL) {
810 memcpy(serial_short, &buf[4], len);
811 serial_short[len] = '\0';
816 int scsi_std_inquiry(struct udev *udev,
817 struct scsi_id_device *dev_scsi, const char *devname)
820 unsigned char buf[SCSI_INQ_BUFF_LEN];
824 dbg(udev, "opening %s\n", devname);
825 fd = open(devname, O_RDONLY | O_NONBLOCK);
827 info(udev, "scsi_id: cannot open %s: %s\n",
828 devname, strerror(errno));
832 if (fstat(fd, &statbuf) < 0) {
833 info(udev, "scsi_id: cannot stat %s: %s\n",
834 devname, strerror(errno));
838 sprintf(dev_scsi->kernel,"%d:%d", major(statbuf.st_rdev),
839 minor(statbuf.st_rdev));
841 memset(buf, 0, SCSI_INQ_BUFF_LEN);
842 err = scsi_inquiry(udev, dev_scsi, fd, 0, 0, buf, SCSI_INQ_BUFF_LEN);
847 memcpy(dev_scsi->vendor, buf + 8, 8);
848 dev_scsi->vendor[8] = '\0';
849 memcpy(dev_scsi->model, buf + 16, 16);
850 dev_scsi->model[16] = '\0';
851 memcpy(dev_scsi->revision, buf + 32, 4);
852 dev_scsi->revision[4] = '\0';
853 sprintf(dev_scsi->type,"%x", buf[0] & 0x1f);
860 int scsi_get_serial(struct udev *udev,
861 struct scsi_id_device *dev_scsi, const char *devname,
862 int page_code, int len)
864 unsigned char page0[SCSI_INQ_BUFF_LEN];
870 memset(dev_scsi->serial, 0, len);
871 dbg(udev, "opening %s\n", devname);
872 srand((unsigned int)getpid());
873 for (cnt = 20; cnt > 0; cnt--) {
874 struct timespec duration;
876 fd = open(devname, O_RDONLY | O_NONBLOCK);
877 if (fd >= 0 || errno != EBUSY)
880 duration.tv_nsec = (200 * 1000 * 1000) + (rand() % 100 * 1000 * 1000);
881 nanosleep(&duration, NULL);
886 if (page_code == PAGE_80) {
887 if (do_scsi_page80_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) {
894 } else if (page_code == PAGE_83) {
895 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)) {
902 } else if (page_code == PAGE_83_PRE_SPC3) {
903 retval = do_scsi_page83_prespc3_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len);
906 * Fallback to servicing a SPC-2/3 compliant page 83
907 * inquiry if the page 83 reply format does not
908 * conform to pre-SPC3 expectations.
911 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)) {
927 } else if (page_code != 0x00) {
928 info(udev, "%s: unsupported page code 0x%d\n", dev_scsi->kernel, page_code);
933 * Get page 0, the page of the pages. By default, try from best to
934 * worst of supported pages: 0x83 then 0x80.
936 if (do_scsi_page0_inquiry(udev, dev_scsi, fd, page0, SCSI_INQ_BUFF_LEN)) {
938 * Don't try anything else. Black list if a specific page
939 * should be used for this vendor+model, or maybe have an
940 * optional fall-back to page 0x80 or page 0x83.
946 dbg(udev, "%s: Checking page0\n", dev_scsi->kernel);
948 for (ind = 4; ind <= page0[3] + 3; ind++)
949 if (page0[ind] == PAGE_83)
950 if (!do_scsi_page83_inquiry(udev, dev_scsi, fd,
951 dev_scsi->serial, dev_scsi->serial_short, len, dev_scsi->unit_serial_number, dev_scsi->wwn, dev_scsi->wwn_vendor_extension)) {
959 for (ind = 4; ind <= page0[3] + 3; ind++)
960 if (page0[ind] == PAGE_80)
961 if (!do_scsi_page80_inquiry(udev, dev_scsi, fd,
962 dev_scsi->serial, dev_scsi->serial_short, len)) {