2 * Copyright (C) IBM Corp. 2003
4 * Author: Patrick Mansfield<patmans@us.ibm.com>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 #include <sys/types.h>
21 #include <sys/ioctl.h>
32 #include <scsi/scsi.h>
34 #include <linux/types.h>
35 #include <linux/bsg.h>
38 #include "libudev-private.h"
43 * A priority based list of id, naa, and binary/ascii for the identifier
44 * descriptor in VPD page 0x83.
46 * Brute force search for a match starting with the first value in the
47 * following id_search_list. This is not a performance issue, since there
48 * is normally one or some small number of descriptors.
50 static const struct scsi_id_search_values id_search_list[] = {
51 { SCSI_ID_TGTGROUP, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
52 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG_EXTENDED, SCSI_ID_BINARY },
53 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG_EXTENDED, SCSI_ID_ASCII },
54 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG, SCSI_ID_BINARY },
55 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG, SCSI_ID_ASCII },
57 * Devices already exist using NAA values that are now marked
58 * reserved. These should not conflict with other values, or it is
59 * a bug in the device. As long as we find the IEEE extended one
60 * first, we really don't care what other ones are used. Using
61 * don't care here means that a device that returns multiple
62 * non-IEEE descriptors in a random order will get different
65 { SCSI_ID_NAA, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
66 { SCSI_ID_NAA, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
67 { SCSI_ID_EUI_64, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
68 { SCSI_ID_EUI_64, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
69 { SCSI_ID_T10_VENDOR, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
70 { SCSI_ID_T10_VENDOR, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
71 { SCSI_ID_VENDOR_SPECIFIC, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
72 { SCSI_ID_VENDOR_SPECIFIC, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
75 static const char hex_str[]="0123456789abcdef";
78 * Values returned in the result/status, only the ones used by the code
82 #define DID_NO_CONNECT 0x01 /* Unable to connect before timeout */
83 #define DID_BUS_BUSY 0x02 /* Bus remain busy until timeout */
84 #define DID_TIME_OUT 0x03 /* Timed out for some other reason */
85 #define DRIVER_TIMEOUT 0x06
86 #define DRIVER_SENSE 0x08 /* Sense_buffer has been set */
88 /* The following "category" function returns one of the following */
89 #define SG_ERR_CAT_CLEAN 0 /* No errors or other information */
90 #define SG_ERR_CAT_MEDIA_CHANGED 1 /* interpreted from sense buffer */
91 #define SG_ERR_CAT_RESET 2 /* interpreted from sense buffer */
92 #define SG_ERR_CAT_TIMEOUT 3
93 #define SG_ERR_CAT_RECOVERED 4 /* Successful command after recovered err */
94 #define SG_ERR_CAT_NOTSUPPORTED 5 /* Illegal / unsupported command */
95 #define SG_ERR_CAT_SENSE 98 /* Something else in the sense buffer */
96 #define SG_ERR_CAT_OTHER 99 /* Some other error/warning */
98 static int do_scsi_page80_inquiry(struct udev *udev,
99 struct scsi_id_device *dev_scsi, int fd,
100 char *serial, char *serial_short, int max_len);
102 static int sg_err_category_new(struct udev *udev,
103 int scsi_status, int msg_status, int
104 host_status, int driver_status, const
105 unsigned char *sense_buffer, int sb_len)
110 * XXX change to return only two values - failed or OK.
113 if (!scsi_status && !host_status && !driver_status)
114 return SG_ERR_CAT_CLEAN;
116 if ((scsi_status == SCSI_CHECK_CONDITION) ||
117 (scsi_status == SCSI_COMMAND_TERMINATED) ||
118 ((driver_status & 0xf) == DRIVER_SENSE)) {
119 if (sense_buffer && (sb_len > 2)) {
123 if (sense_buffer[0] & 0x2) {
124 sense_key = sense_buffer[1] & 0xf;
125 asc = sense_buffer[2];
127 sense_key = sense_buffer[2] & 0xf;
128 asc = (sb_len > 12) ? sense_buffer[12] : 0;
131 if (sense_key == RECOVERED_ERROR)
132 return SG_ERR_CAT_RECOVERED;
133 else if (sense_key == UNIT_ATTENTION) {
135 return SG_ERR_CAT_MEDIA_CHANGED;
137 return SG_ERR_CAT_RESET;
138 } else if (sense_key == ILLEGAL_REQUEST) {
139 return SG_ERR_CAT_NOTSUPPORTED;
142 return SG_ERR_CAT_SENSE;
145 if ((host_status == DID_NO_CONNECT) ||
146 (host_status == DID_BUS_BUSY) ||
147 (host_status == DID_TIME_OUT))
148 return SG_ERR_CAT_TIMEOUT;
150 if (!driver_status) {
151 if (driver_status == DRIVER_TIMEOUT)
152 return SG_ERR_CAT_TIMEOUT;
154 return SG_ERR_CAT_OTHER;
157 static int sg_err_category3(struct udev *udev, struct sg_io_hdr *hp)
159 return sg_err_category_new(udev,
160 hp->status, hp->msg_status,
161 hp->host_status, hp->driver_status,
162 hp->sbp, hp->sb_len_wr);
165 static int sg_err_category4(struct udev *udev, struct sg_io_v4 *hp)
167 return sg_err_category_new(udev, hp->device_status, 0,
168 hp->transport_status, hp->driver_status,
169 (unsigned char *)(uintptr_t)hp->response,
173 static int scsi_dump_sense(struct udev *udev,
174 struct scsi_id_device *dev_scsi,
175 unsigned char *sense_buffer, int sb_len)
183 char out_buffer[256];
188 * Figure out and print the sense key, asc and ascq.
190 * If you want to suppress these for a particular drive model, add
191 * a black list entry in the scsi_id config file.
193 * XXX We probably need to: lookup the sense/asc/ascq in a retry
194 * table, and if found return 1 (after dumping the sense, asc, and
195 * ascq). So, if/when we get something like a power on/reset,
196 * we'll retry the command.
199 dbg(udev, "got check condition\n");
202 info(udev, "%s: sense buffer empty\n", dev_scsi->kernel);
206 sense_class = (sense_buffer[0] >> 4) & 0x07;
207 code = sense_buffer[0] & 0xf;
209 if (sense_class == 7) {
211 * extended sense data.
213 s = sense_buffer[7] + 8;
215 info(udev, "%s: sense buffer too small %d bytes, %d bytes too short\n",
216 dev_scsi->kernel, sb_len, s - sb_len);
219 if ((code == 0x0) || (code == 0x1)) {
220 sense_key = sense_buffer[2] & 0xf;
225 info(udev, "%s: sense result too" " small %d bytes\n",
226 dev_scsi->kernel, s);
229 asc = sense_buffer[12];
230 ascq = sense_buffer[13];
231 } else if ((code == 0x2) || (code == 0x3)) {
232 sense_key = sense_buffer[1] & 0xf;
233 asc = sense_buffer[2];
234 ascq = sense_buffer[3];
236 info(udev, "%s: invalid sense code 0x%x\n",
237 dev_scsi->kernel, code);
240 info(udev, "%s: sense key 0x%x ASC 0x%x ASCQ 0x%x\n",
241 dev_scsi->kernel, sense_key, asc, ascq);
244 info(udev, "%s: sense buffer too small %d bytes, %d bytes too short\n",
245 dev_scsi->kernel, sb_len, 4 - sb_len);
249 if (sense_buffer[0] < 15)
250 info(udev, "%s: old sense key: 0x%x\n", dev_scsi->kernel, sense_buffer[0] & 0x0f);
252 info(udev, "%s: sense = %2x %2x\n",
253 dev_scsi->kernel, sense_buffer[0], sense_buffer[2]);
254 info(udev, "%s: non-extended sense class %d code 0x%0x\n",
255 dev_scsi->kernel, sense_class, code);
260 for (i = 0, j = 0; (i < s) && (j < 254); i++) {
261 dbg(udev, "i %d, j %d\n", i, j);
262 out_buffer[j++] = hex_str[(sense_buffer[i] & 0xf0) >> 4];
263 out_buffer[j++] = hex_str[sense_buffer[i] & 0x0f];
264 out_buffer[j++] = ' ';
266 out_buffer[j] = '\0';
267 info(udev, "%s: sense dump:\n", dev_scsi->kernel);
268 info(udev, "%s: %s\n", dev_scsi->kernel, out_buffer);
274 static int scsi_dump(struct udev *udev,
275 struct scsi_id_device *dev_scsi, struct sg_io_hdr *io)
277 if (!io->status && !io->host_status && !io->msg_status &&
278 !io->driver_status) {
280 * Impossible, should not be called.
282 info(udev, "%s: called with no error\n", __FUNCTION__);
286 info(udev, "%s: sg_io failed status 0x%x 0x%x 0x%x 0x%x\n",
287 dev_scsi->kernel, io->driver_status, io->host_status, io->msg_status, io->status);
288 if (io->status == SCSI_CHECK_CONDITION)
289 return scsi_dump_sense(udev, dev_scsi, io->sbp, io->sb_len_wr);
294 static int scsi_dump_v4(struct udev *udev,
295 struct scsi_id_device *dev_scsi, struct sg_io_v4 *io)
297 if (!io->device_status && !io->transport_status &&
298 !io->driver_status) {
300 * Impossible, should not be called.
302 info(udev, "%s: called with no error\n", __FUNCTION__);
306 info(udev, "%s: sg_io failed status 0x%x 0x%x 0x%x\n",
307 dev_scsi->kernel, io->driver_status, io->transport_status,
309 if (io->device_status == SCSI_CHECK_CONDITION)
310 return scsi_dump_sense(udev, dev_scsi, (unsigned char *)(uintptr_t)io->response,
316 static int scsi_inquiry(struct udev *udev,
317 struct scsi_id_device *dev_scsi, int fd,
318 unsigned char evpd, unsigned char page,
319 unsigned char *buf, unsigned int buflen)
321 unsigned char inq_cmd[INQUIRY_CMDLEN] =
322 { INQUIRY_CMD, evpd, page, 0, buflen, 0 };
323 unsigned char sense[SENSE_BUFF_LEN];
326 int retry = 3; /* rather random */
328 if (buflen > SCSI_INQ_BUFF_LEN) {
329 info(udev, "buflen %d too long\n", buflen);
334 dbg(udev, "%s evpd %d, page 0x%x\n", dev_scsi->kernel, evpd, page);
336 if (dev_scsi->use_sg == 4) {
337 struct sg_io_v4 io_v4;
339 memset(&io_v4, 0, sizeof(struct sg_io_v4));
341 io_v4.protocol = BSG_PROTOCOL_SCSI;
342 io_v4.subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD;
343 io_v4.request_len = sizeof(inq_cmd);
344 io_v4.request = (uintptr_t)inq_cmd;
345 io_v4.max_response_len = sizeof(sense);
346 io_v4.response = (uintptr_t)sense;
347 io_v4.din_xfer_len = buflen;
348 io_v4.din_xferp = (uintptr_t)buf;
349 io_buf = (void *)&io_v4;
351 struct sg_io_hdr io_hdr;
353 memset(&io_hdr, 0, sizeof(struct sg_io_hdr));
354 io_hdr.interface_id = 'S';
355 io_hdr.cmd_len = sizeof(inq_cmd);
356 io_hdr.mx_sb_len = sizeof(sense);
357 io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
358 io_hdr.dxfer_len = buflen;
360 io_hdr.cmdp = inq_cmd;
362 io_hdr.timeout = DEF_TIMEOUT;
363 io_buf = (void *)&io_hdr;
366 retval = ioctl(fd, SG_IO, io_buf);
368 if ((errno == EINVAL || errno == ENOSYS) && dev_scsi->use_sg == 4) {
369 dev_scsi->use_sg = 3;
372 info(udev, "%s: ioctl failed: %s\n", dev_scsi->kernel, strerror(errno));
376 if (dev_scsi->use_sg == 4)
377 retval = sg_err_category4(udev, io_buf);
379 retval = sg_err_category3(udev, io_buf);
382 case SG_ERR_CAT_NOTSUPPORTED:
385 case SG_ERR_CAT_CLEAN:
386 case SG_ERR_CAT_RECOVERED:
391 if (dev_scsi->use_sg == 4)
392 retval = scsi_dump_v4(udev, dev_scsi, io_buf);
394 retval = scsi_dump(udev, dev_scsi, io_buf);
399 } else if (retval > 0) {
401 dbg(udev, "%s: Retrying ...\n", dev_scsi->kernel);
409 info(udev, "%s: Unable to get INQUIRY vpd %d page 0x%x.\n",
410 dev_scsi->kernel, evpd, page);
415 /* Get list of supported EVPD pages */
416 static int do_scsi_page0_inquiry(struct udev *udev,
417 struct scsi_id_device *dev_scsi, int fd,
418 unsigned char *buffer, unsigned int len)
422 memset(buffer, 0, len);
423 retval = scsi_inquiry(udev, dev_scsi, fd, 1, 0x0, buffer, len);
427 if (buffer[1] != 0) {
428 info(udev, "%s: page 0 not available.\n", dev_scsi->kernel);
431 if (buffer[3] > len) {
432 info(udev, "%s: page 0 buffer too long %d\n", dev_scsi->kernel, buffer[3]);
437 * Following check is based on code once included in the 2.5.x
440 * Some ill behaved devices return the standard inquiry here
441 * rather than the evpd data, snoop the data to verify.
443 if (buffer[3] > MODEL_LENGTH) {
445 * If the vendor id appears in the page assume the page is
448 if (!strncmp((char *)&buffer[VENDOR_LENGTH], dev_scsi->vendor, VENDOR_LENGTH)) {
449 info(udev, "%s: invalid page0 data\n", dev_scsi->kernel);
457 * The caller checks that serial is long enough to include the vendor +
460 static int prepend_vendor_model(struct udev *udev,
461 struct scsi_id_device *dev_scsi, char *serial)
465 strncpy(serial, dev_scsi->vendor, VENDOR_LENGTH);
466 strncat(serial, dev_scsi->model, MODEL_LENGTH);
467 ind = strlen(serial);
470 * This is not a complete check, since we are using strncat/cpy
471 * above, ind will never be too large.
473 if (ind != (VENDOR_LENGTH + MODEL_LENGTH)) {
474 info(udev, "%s: expected length %d, got length %d\n",
475 dev_scsi->kernel, (VENDOR_LENGTH + MODEL_LENGTH), ind);
482 * check_fill_0x83_id - check the page 0x83 id, if OK allocate and fill
485 static int check_fill_0x83_id(struct udev *udev,
486 struct scsi_id_device *dev_scsi,
487 unsigned char *page_83,
488 const struct scsi_id_search_values
489 *id_search, char *serial, char *serial_short,
490 int max_len, char *wwn,
491 char *wwn_vendor_extension, char *tgpt_group)
496 * ASSOCIATION must be with the device (value 0)
497 * or with the target port for SCSI_ID_TGTPORT
499 if (page_83[1] & 0x30 == 0x10)
500 if (id_search->id_type != SCSI_ID_TGTGROUP)
502 else if ((page_83[1] & 0x30) != 0)
505 if ((page_83[1] & 0x0f) != id_search->id_type)
509 * Possibly check NAA sub-type.
511 if ((id_search->naa_type != SCSI_ID_NAA_DONT_CARE) &&
512 (id_search->naa_type != (page_83[4] & 0xf0) >> 4))
516 * Check for matching code set - ASCII or BINARY.
518 if ((page_83[0] & 0x0f) != id_search->code_set)
522 * page_83[3]: identifier length
525 if ((page_83[0] & 0x0f) != SCSI_ID_ASCII)
527 * If not ASCII, use two bytes for each binary value.
532 * Add one byte for the NUL termination, and one for the id_type.
535 if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC)
536 len += VENDOR_LENGTH + MODEL_LENGTH;
539 info(udev, "%s: length %d too short - need %d\n",
540 dev_scsi->kernel, max_len, len);
544 if (id_search->id_type == SCSI_ID_TGTGROUP && tgpt_group != NULL) {
547 group = ((unsigned int)page_83[6] << 8) | page_83[7];
548 sprintf(tgpt_group,"%x", group);
552 serial[0] = hex_str[id_search->id_type];
555 * For SCSI_ID_VENDOR_SPECIFIC prepend the vendor and model before
556 * the id since it is not unique across all vendors and models,
557 * this differs from SCSI_ID_T10_VENDOR, where the vendor is
558 * included in the identifier.
560 if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC)
561 if (prepend_vendor_model(udev, dev_scsi, &serial[1]) < 0) {
562 dbg(udev, "prepend failed\n");
566 i = 4; /* offset to the start of the identifier */
567 s = j = strlen(serial);
568 if ((page_83[0] & 0x0f) == SCSI_ID_ASCII) {
572 while (i < (4 + page_83[3]))
573 serial[j++] = page_83[i++];
576 * Binary descriptor, convert to ASCII, using two bytes of
577 * ASCII for each byte in the page_83.
579 while (i < (4 + page_83[3])) {
580 serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4];
581 serial[j++] = hex_str[page_83[i] & 0x0f];
586 strcpy(serial_short, &serial[s]);
588 if (id_search->id_type == SCSI_ID_NAA && wwn != NULL) {
589 strncpy(wwn, &serial[s], 16);
590 if (wwn_vendor_extension != NULL) {
591 strncpy(wwn_vendor_extension, &serial[s + 16], 16);
598 /* Extract the raw binary from VPD 0x83 pre-SPC devices */
599 static int check_fill_0x83_prespc3(struct udev *udev,
600 struct scsi_id_device *dev_scsi,
601 unsigned char *page_83,
602 const struct scsi_id_search_values
603 *id_search, char *serial, char *serial_short, int max_len)
607 dbg(udev, "using pre-spc3-83 for %s\n", dev_scsi->kernel);
608 serial[0] = hex_str[id_search->id_type];
609 /* serial has been memset to zero before */
610 j = strlen(serial); /* j = 1; */
612 for (i = 0; (i < page_83[3]) && (j < max_len-3); ++i) {
613 serial[j++] = hex_str[(page_83[4+i] & 0xf0) >> 4];
614 serial[j++] = hex_str[ page_83[4+i] & 0x0f];
616 serial[max_len-1] = 0;
617 strncpy(serial_short, serial, max_len-1);
622 /* Get device identification VPD page */
623 static int do_scsi_page83_inquiry(struct udev *udev,
624 struct scsi_id_device *dev_scsi, int fd,
625 char *serial, char *serial_short, int len,
626 char *unit_serial_number, char *wwn,
627 char *wwn_vendor_extension, char *tgpt_group)
630 unsigned int id_ind, j;
631 unsigned char page_83[SCSI_INQ_BUFF_LEN];
633 /* also pick up the page 80 serial number */
634 do_scsi_page80_inquiry(udev, dev_scsi, fd, NULL, unit_serial_number, MAX_SERIAL_LEN);
636 memset(page_83, 0, SCSI_INQ_BUFF_LEN);
637 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83,
642 if (page_83[1] != PAGE_83) {
643 info(udev, "%s: Invalid page 0x83\n", dev_scsi->kernel);
648 * XXX Some devices (IBM 3542) return all spaces for an identifier if
649 * the LUN is not actually configured. This leads to identifiers of
654 * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
655 * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
657 * The SCSI-2 page 83 format returns an IEEE WWN in binary
658 * encoded hexi-decimal in the 16 bytes following the initial
659 * 4-byte page 83 reply header.
661 * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
662 * of an Identification descriptor. The 3rd byte of the first
663 * Identification descriptor is a reserved (BSZ) byte field.
665 * Reference the 7th byte of the page 83 reply to determine
666 * whether the reply is compliant with SCSI-2 or SPC-2/3
667 * specifications. A zero value in the 7th byte indicates
668 * an SPC-2/3 conformant reply, (i.e., the reserved field of the
669 * first Identification descriptor). This byte will be non-zero
670 * for a SCSI-2 conformant page 83 reply from these EMC
671 * Symmetrix models since the 7th byte of the reply corresponds
672 * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
677 return check_fill_0x83_prespc3(udev,
678 dev_scsi, page_83, id_search_list,
679 serial, serial_short, len);
682 * Search for a match in the prioritized id_search_list - since WWN ids
683 * come first we can pick up the WWN in check_fill_0x83_id().
686 id_ind < sizeof(id_search_list)/sizeof(id_search_list[0]);
689 * Examine each descriptor returned. There is normally only
690 * one or a small number of descriptors.
692 for (j = 4; j <= (unsigned int)page_83[3] + 3; j += page_83[j + 3] + 4) {
693 retval = check_fill_0x83_id(udev,
694 dev_scsi, &page_83[j],
695 &id_search_list[id_ind],
696 serial, serial_short, len,
697 wwn, wwn_vendor_extension,
699 dbg(udev, "%s id desc %d/%d/%d\n", dev_scsi->kernel,
700 id_search_list[id_ind].id_type,
701 id_search_list[id_ind].naa_type,
702 id_search_list[id_ind].code_set);
704 dbg(udev, " used\n");
706 } else if (retval < 0) {
707 dbg(udev, " failed\n");
710 dbg(udev, " not used\n");
718 * Get device identification VPD page for older SCSI-2 device which is not
719 * compliant with either SPC-2 or SPC-3 format.
721 * Return the hard coded error code value 2 if the page 83 reply is not
722 * conformant to the SCSI-2 format.
724 static int do_scsi_page83_prespc3_inquiry(struct udev *udev,
725 struct scsi_id_device *dev_scsi, int fd,
726 char *serial, char *serial_short, int len)
730 unsigned char page_83[SCSI_INQ_BUFF_LEN];
732 memset(page_83, 0, SCSI_INQ_BUFF_LEN);
733 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83, SCSI_INQ_BUFF_LEN);
737 if (page_83[1] != PAGE_83) {
738 info(udev, "%s: Invalid page 0x83\n", dev_scsi->kernel);
742 * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
743 * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
745 * The SCSI-2 page 83 format returns an IEEE WWN in binary
746 * encoded hexi-decimal in the 16 bytes following the initial
747 * 4-byte page 83 reply header.
749 * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
750 * of an Identification descriptor. The 3rd byte of the first
751 * Identification descriptor is a reserved (BSZ) byte field.
753 * Reference the 7th byte of the page 83 reply to determine
754 * whether the reply is compliant with SCSI-2 or SPC-2/3
755 * specifications. A zero value in the 7th byte indicates
756 * an SPC-2/3 conformant reply, (i.e., the reserved field of the
757 * first Identification descriptor). This byte will be non-zero
758 * for a SCSI-2 conformant page 83 reply from these EMC
759 * Symmetrix models since the 7th byte of the reply corresponds
760 * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
766 serial[0] = hex_str[id_search_list[0].id_type];
768 * The first four bytes contain data, not a descriptor.
773 * Binary descriptor, convert to ASCII,
774 * using two bytes of ASCII for each byte
777 while (i < (page_83[3]+4)) {
778 serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4];
779 serial[j++] = hex_str[page_83[i] & 0x0f];
782 dbg(udev, "using pre-spc3-83 for %s\n", dev_scsi->kernel);
786 /* Get unit serial number VPD page */
787 static int do_scsi_page80_inquiry(struct udev *udev,
788 struct scsi_id_device *dev_scsi, int fd,
789 char *serial, char *serial_short, int max_len)
795 unsigned char buf[SCSI_INQ_BUFF_LEN];
797 memset(buf, 0, SCSI_INQ_BUFF_LEN);
798 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_80, buf, SCSI_INQ_BUFF_LEN);
802 if (buf[1] != PAGE_80) {
803 info(udev, "%s: Invalid page 0x80\n", dev_scsi->kernel);
807 len = 1 + VENDOR_LENGTH + MODEL_LENGTH + buf[3];
809 info(udev, "%s: length %d too short - need %d\n",
810 dev_scsi->kernel, max_len, len);
814 * Prepend 'S' to avoid unlikely collision with page 0x83 vendor
815 * specific type where we prepend '0' + vendor + model.
818 if (serial != NULL) {
820 ser_ind = prepend_vendor_model(udev, dev_scsi, &serial[1]);
823 for (i = 4; i < len + 4; i++, ser_ind++)
824 serial[ser_ind] = buf[i];
826 if (serial_short != NULL) {
827 memcpy(serial_short, &buf[4], len);
828 serial_short[len] = '\0';
833 int scsi_std_inquiry(struct udev *udev,
834 struct scsi_id_device *dev_scsi, const char *devname)
837 unsigned char buf[SCSI_INQ_BUFF_LEN];
841 dbg(udev, "opening %s\n", devname);
842 fd = open(devname, O_RDONLY | O_NONBLOCK);
844 info(udev, "scsi_id: cannot open %s: %s\n",
845 devname, strerror(errno));
849 if (fstat(fd, &statbuf) < 0) {
850 info(udev, "scsi_id: cannot stat %s: %s\n",
851 devname, strerror(errno));
855 sprintf(dev_scsi->kernel,"%d:%d", major(statbuf.st_rdev),
856 minor(statbuf.st_rdev));
858 memset(buf, 0, SCSI_INQ_BUFF_LEN);
859 err = scsi_inquiry(udev, dev_scsi, fd, 0, 0, buf, SCSI_INQ_BUFF_LEN);
864 memcpy(dev_scsi->vendor, buf + 8, 8);
865 dev_scsi->vendor[8] = '\0';
866 memcpy(dev_scsi->model, buf + 16, 16);
867 dev_scsi->model[16] = '\0';
868 memcpy(dev_scsi->revision, buf + 32, 4);
869 dev_scsi->revision[4] = '\0';
870 sprintf(dev_scsi->type,"%x", buf[0] & 0x1f);
877 int scsi_get_serial(struct udev *udev,
878 struct scsi_id_device *dev_scsi, const char *devname,
879 int page_code, int len)
881 unsigned char page0[SCSI_INQ_BUFF_LEN];
887 memset(dev_scsi->serial, 0, len);
888 dbg(udev, "opening %s\n", devname);
889 srand((unsigned int)getpid());
890 for (cnt = 20; cnt > 0; cnt--) {
891 struct timespec duration;
893 fd = open(devname, O_RDONLY | O_NONBLOCK);
894 if (fd >= 0 || errno != EBUSY)
897 duration.tv_nsec = (200 * 1000 * 1000) + (rand() % 100 * 1000 * 1000);
898 nanosleep(&duration, NULL);
903 if (page_code == PAGE_80) {
904 if (do_scsi_page80_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) {
911 } else if (page_code == PAGE_83) {
912 if (do_scsi_page83_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len, dev_scsi->unit_serial_number, dev_scsi->wwn, dev_scsi->wwn_vendor_extension, dev_scsi->tgpt_group)) {
919 } else if (page_code == PAGE_83_PRE_SPC3) {
920 retval = do_scsi_page83_prespc3_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len);
923 * Fallback to servicing a SPC-2/3 compliant page 83
924 * inquiry if the page 83 reply format does not
925 * conform to pre-SPC3 expectations.
928 if (do_scsi_page83_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len, dev_scsi->unit_serial_number, dev_scsi->wwn, dev_scsi->wwn_vendor_extension, dev_scsi->tgpt_group)) {
944 } else if (page_code != 0x00) {
945 info(udev, "%s: unsupported page code 0x%d\n", dev_scsi->kernel, page_code);
950 * Get page 0, the page of the pages. By default, try from best to
951 * worst of supported pages: 0x83 then 0x80.
953 if (do_scsi_page0_inquiry(udev, dev_scsi, fd, page0, SCSI_INQ_BUFF_LEN)) {
955 * Don't try anything else. Black list if a specific page
956 * should be used for this vendor+model, or maybe have an
957 * optional fall-back to page 0x80 or page 0x83.
963 dbg(udev, "%s: Checking page0\n", dev_scsi->kernel);
965 for (ind = 4; ind <= page0[3] + 3; ind++)
966 if (page0[ind] == PAGE_83)
967 if (!do_scsi_page83_inquiry(udev, dev_scsi, fd,
968 dev_scsi->serial, dev_scsi->serial_short, len, dev_scsi->unit_serial_number, dev_scsi->wwn, dev_scsi->wwn_vendor_extension, dev_scsi->tgpt_group)) {
976 for (ind = 4; ind <= page0[3] + 3; ind++)
977 if (page0[ind] == PAGE_80)
978 if (!do_scsi_page80_inquiry(udev, dev_scsi, fd,
979 dev_scsi->serial, dev_scsi->serial_short, len)) {