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;
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];
325 struct sg_io_v4 io_v4;
326 struct sg_io_hdr io_hdr;
327 int retry = 3; /* rather random */
330 if (buflen > SCSI_INQ_BUFF_LEN) {
331 info(udev, "buflen %d too long\n", buflen);
336 dbg(udev, "%s evpd %d, page 0x%x\n", dev_scsi->kernel, evpd, page);
338 if (dev_scsi->use_sg == 4) {
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 memset(&io_hdr, 0, sizeof(struct sg_io_hdr));
352 io_hdr.interface_id = 'S';
353 io_hdr.cmd_len = sizeof(inq_cmd);
354 io_hdr.mx_sb_len = sizeof(sense);
355 io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
356 io_hdr.dxfer_len = buflen;
358 io_hdr.cmdp = inq_cmd;
360 io_hdr.timeout = DEF_TIMEOUT;
361 io_buf = (void *)&io_hdr;
364 retval = ioctl(fd, SG_IO, io_buf);
366 if ((errno == EINVAL || errno == ENOSYS) && dev_scsi->use_sg == 4) {
367 dev_scsi->use_sg = 3;
370 info(udev, "%s: ioctl failed: %s\n", dev_scsi->kernel, strerror(errno));
374 if (dev_scsi->use_sg == 4)
375 retval = sg_err_category4(udev, io_buf);
377 retval = sg_err_category3(udev, io_buf);
380 case SG_ERR_CAT_NOTSUPPORTED:
383 case SG_ERR_CAT_CLEAN:
384 case SG_ERR_CAT_RECOVERED:
389 if (dev_scsi->use_sg == 4)
390 retval = scsi_dump_v4(udev, dev_scsi, io_buf);
392 retval = scsi_dump(udev, dev_scsi, io_buf);
397 } else if (retval > 0) {
399 dbg(udev, "%s: Retrying ...\n", dev_scsi->kernel);
407 info(udev, "%s: Unable to get INQUIRY vpd %d page 0x%x.\n",
408 dev_scsi->kernel, evpd, page);
413 /* Get list of supported EVPD pages */
414 static int do_scsi_page0_inquiry(struct udev *udev,
415 struct scsi_id_device *dev_scsi, int fd,
416 unsigned char *buffer, unsigned int len)
420 memset(buffer, 0, len);
421 retval = scsi_inquiry(udev, dev_scsi, fd, 1, 0x0, buffer, len);
425 if (buffer[1] != 0) {
426 info(udev, "%s: page 0 not available.\n", dev_scsi->kernel);
429 if (buffer[3] > len) {
430 info(udev, "%s: page 0 buffer too long %d\n", dev_scsi->kernel, buffer[3]);
435 * Following check is based on code once included in the 2.5.x
438 * Some ill behaved devices return the standard inquiry here
439 * rather than the evpd data, snoop the data to verify.
441 if (buffer[3] > MODEL_LENGTH) {
443 * If the vendor id appears in the page assume the page is
446 if (!strncmp((char *)&buffer[VENDOR_LENGTH], dev_scsi->vendor, VENDOR_LENGTH)) {
447 info(udev, "%s: invalid page0 data\n", dev_scsi->kernel);
455 * The caller checks that serial is long enough to include the vendor +
458 static int prepend_vendor_model(struct udev *udev,
459 struct scsi_id_device *dev_scsi, char *serial)
463 strncpy(serial, dev_scsi->vendor, VENDOR_LENGTH);
464 strncat(serial, dev_scsi->model, MODEL_LENGTH);
465 ind = strlen(serial);
468 * This is not a complete check, since we are using strncat/cpy
469 * above, ind will never be too large.
471 if (ind != (VENDOR_LENGTH + MODEL_LENGTH)) {
472 info(udev, "%s: expected length %d, got length %d\n",
473 dev_scsi->kernel, (VENDOR_LENGTH + MODEL_LENGTH), ind);
480 * check_fill_0x83_id - check the page 0x83 id, if OK allocate and fill
483 static int check_fill_0x83_id(struct udev *udev,
484 struct scsi_id_device *dev_scsi,
485 unsigned char *page_83,
486 const struct scsi_id_search_values
487 *id_search, char *serial, char *serial_short,
488 int max_len, char *wwn,
489 char *wwn_vendor_extension, char *tgpt_group)
494 * ASSOCIATION must be with the device (value 0)
495 * or with the target port for SCSI_ID_TGTPORT
497 if ((page_83[1] & 0x30) == 0x10) {
498 if (id_search->id_type != SCSI_ID_TGTGROUP)
500 } else if ((page_83[1] & 0x30) != 0) {
504 if ((page_83[1] & 0x0f) != id_search->id_type)
508 * Possibly check NAA sub-type.
510 if ((id_search->naa_type != SCSI_ID_NAA_DONT_CARE) &&
511 (id_search->naa_type != (page_83[4] & 0xf0) >> 4))
515 * Check for matching code set - ASCII or BINARY.
517 if ((page_83[0] & 0x0f) != id_search->code_set)
521 * page_83[3]: identifier length
524 if ((page_83[0] & 0x0f) != SCSI_ID_ASCII)
526 * If not ASCII, use two bytes for each binary value.
531 * Add one byte for the NUL termination, and one for the id_type.
534 if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC)
535 len += VENDOR_LENGTH + MODEL_LENGTH;
538 info(udev, "%s: length %d too short - need %d\n",
539 dev_scsi->kernel, max_len, len);
543 if (id_search->id_type == SCSI_ID_TGTGROUP && tgpt_group != NULL) {
546 group = ((unsigned int)page_83[6] << 8) | page_83[7];
547 sprintf(tgpt_group,"%x", group);
551 serial[0] = hex_str[id_search->id_type];
554 * For SCSI_ID_VENDOR_SPECIFIC prepend the vendor and model before
555 * the id since it is not unique across all vendors and models,
556 * this differs from SCSI_ID_T10_VENDOR, where the vendor is
557 * included in the identifier.
559 if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC)
560 if (prepend_vendor_model(udev, dev_scsi, &serial[1]) < 0) {
561 dbg(udev, "prepend failed\n");
565 i = 4; /* offset to the start of the identifier */
566 s = j = strlen(serial);
567 if ((page_83[0] & 0x0f) == SCSI_ID_ASCII) {
571 while (i < (4 + page_83[3]))
572 serial[j++] = page_83[i++];
575 * Binary descriptor, convert to ASCII, using two bytes of
576 * ASCII for each byte in the page_83.
578 while (i < (4 + page_83[3])) {
579 serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4];
580 serial[j++] = hex_str[page_83[i] & 0x0f];
585 strcpy(serial_short, &serial[s]);
587 if (id_search->id_type == SCSI_ID_NAA && wwn != NULL) {
588 strncpy(wwn, &serial[s], 16);
589 if (wwn_vendor_extension != NULL) {
590 strncpy(wwn_vendor_extension, &serial[s + 16], 16);
597 /* Extract the raw binary from VPD 0x83 pre-SPC devices */
598 static int check_fill_0x83_prespc3(struct udev *udev,
599 struct scsi_id_device *dev_scsi,
600 unsigned char *page_83,
601 const struct scsi_id_search_values
602 *id_search, char *serial, char *serial_short, int max_len)
606 dbg(udev, "using pre-spc3-83 for %s\n", dev_scsi->kernel);
607 serial[0] = hex_str[id_search->id_type];
608 /* serial has been memset to zero before */
609 j = strlen(serial); /* j = 1; */
611 for (i = 0; (i < page_83[3]) && (j < max_len-3); ++i) {
612 serial[j++] = hex_str[(page_83[4+i] & 0xf0) >> 4];
613 serial[j++] = hex_str[ page_83[4+i] & 0x0f];
615 serial[max_len-1] = 0;
616 strncpy(serial_short, serial, max_len-1);
621 /* Get device identification VPD page */
622 static int do_scsi_page83_inquiry(struct udev *udev,
623 struct scsi_id_device *dev_scsi, int fd,
624 char *serial, char *serial_short, int len,
625 char *unit_serial_number, char *wwn,
626 char *wwn_vendor_extension, char *tgpt_group)
629 unsigned int id_ind, j;
630 unsigned char page_83[SCSI_INQ_BUFF_LEN];
632 /* also pick up the page 80 serial number */
633 do_scsi_page80_inquiry(udev, dev_scsi, fd, NULL, unit_serial_number, MAX_SERIAL_LEN);
635 memset(page_83, 0, SCSI_INQ_BUFF_LEN);
636 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83,
641 if (page_83[1] != PAGE_83) {
642 info(udev, "%s: Invalid page 0x83\n", dev_scsi->kernel);
647 * XXX Some devices (IBM 3542) return all spaces for an identifier if
648 * the LUN is not actually configured. This leads to identifiers of
653 * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
654 * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
656 * The SCSI-2 page 83 format returns an IEEE WWN in binary
657 * encoded hexi-decimal in the 16 bytes following the initial
658 * 4-byte page 83 reply header.
660 * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
661 * of an Identification descriptor. The 3rd byte of the first
662 * Identification descriptor is a reserved (BSZ) byte field.
664 * Reference the 7th byte of the page 83 reply to determine
665 * whether the reply is compliant with SCSI-2 or SPC-2/3
666 * specifications. A zero value in the 7th byte indicates
667 * an SPC-2/3 conformant reply, (i.e., the reserved field of the
668 * first Identification descriptor). This byte will be non-zero
669 * for a SCSI-2 conformant page 83 reply from these EMC
670 * Symmetrix models since the 7th byte of the reply corresponds
671 * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
676 return check_fill_0x83_prespc3(udev,
677 dev_scsi, page_83, id_search_list,
678 serial, serial_short, len);
681 * Search for a match in the prioritized id_search_list - since WWN ids
682 * come first we can pick up the WWN in check_fill_0x83_id().
685 id_ind < sizeof(id_search_list)/sizeof(id_search_list[0]);
688 * Examine each descriptor returned. There is normally only
689 * one or a small number of descriptors.
691 for (j = 4; j <= (unsigned int)page_83[3] + 3; j += page_83[j + 3] + 4) {
692 retval = check_fill_0x83_id(udev,
693 dev_scsi, &page_83[j],
694 &id_search_list[id_ind],
695 serial, serial_short, len,
696 wwn, wwn_vendor_extension,
698 dbg(udev, "%s id desc %d/%d/%d\n", dev_scsi->kernel,
699 id_search_list[id_ind].id_type,
700 id_search_list[id_ind].naa_type,
701 id_search_list[id_ind].code_set);
703 dbg(udev, " used\n");
705 } else if (retval < 0) {
706 dbg(udev, " failed\n");
709 dbg(udev, " not used\n");
717 * Get device identification VPD page for older SCSI-2 device which is not
718 * compliant with either SPC-2 or SPC-3 format.
720 * Return the hard coded error code value 2 if the page 83 reply is not
721 * conformant to the SCSI-2 format.
723 static int do_scsi_page83_prespc3_inquiry(struct udev *udev,
724 struct scsi_id_device *dev_scsi, int fd,
725 char *serial, char *serial_short, int len)
729 unsigned char page_83[SCSI_INQ_BUFF_LEN];
731 memset(page_83, 0, SCSI_INQ_BUFF_LEN);
732 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83, SCSI_INQ_BUFF_LEN);
736 if (page_83[1] != PAGE_83) {
737 info(udev, "%s: Invalid page 0x83\n", dev_scsi->kernel);
741 * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
742 * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
744 * The SCSI-2 page 83 format returns an IEEE WWN in binary
745 * encoded hexi-decimal in the 16 bytes following the initial
746 * 4-byte page 83 reply header.
748 * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
749 * of an Identification descriptor. The 3rd byte of the first
750 * Identification descriptor is a reserved (BSZ) byte field.
752 * Reference the 7th byte of the page 83 reply to determine
753 * whether the reply is compliant with SCSI-2 or SPC-2/3
754 * specifications. A zero value in the 7th byte indicates
755 * an SPC-2/3 conformant reply, (i.e., the reserved field of the
756 * first Identification descriptor). This byte will be non-zero
757 * for a SCSI-2 conformant page 83 reply from these EMC
758 * Symmetrix models since the 7th byte of the reply corresponds
759 * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
765 serial[0] = hex_str[id_search_list[0].id_type];
767 * The first four bytes contain data, not a descriptor.
772 * Binary descriptor, convert to ASCII,
773 * using two bytes of ASCII for each byte
776 while (i < (page_83[3]+4)) {
777 serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4];
778 serial[j++] = hex_str[page_83[i] & 0x0f];
781 dbg(udev, "using pre-spc3-83 for %s\n", dev_scsi->kernel);
785 /* Get unit serial number VPD page */
786 static int do_scsi_page80_inquiry(struct udev *udev,
787 struct scsi_id_device *dev_scsi, int fd,
788 char *serial, char *serial_short, int max_len)
794 unsigned char buf[SCSI_INQ_BUFF_LEN];
796 memset(buf, 0, SCSI_INQ_BUFF_LEN);
797 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_80, buf, SCSI_INQ_BUFF_LEN);
801 if (buf[1] != PAGE_80) {
802 info(udev, "%s: Invalid page 0x80\n", dev_scsi->kernel);
806 len = 1 + VENDOR_LENGTH + MODEL_LENGTH + buf[3];
808 info(udev, "%s: length %d too short - need %d\n",
809 dev_scsi->kernel, max_len, len);
813 * Prepend 'S' to avoid unlikely collision with page 0x83 vendor
814 * specific type where we prepend '0' + vendor + model.
817 if (serial != NULL) {
819 ser_ind = prepend_vendor_model(udev, dev_scsi, &serial[1]);
822 for (i = 4; i < len + 4; i++, ser_ind++)
823 serial[ser_ind] = buf[i];
825 if (serial_short != NULL) {
826 memcpy(serial_short, &buf[4], len);
827 serial_short[len] = '\0';
832 int scsi_std_inquiry(struct udev *udev,
833 struct scsi_id_device *dev_scsi, const char *devname)
836 unsigned char buf[SCSI_INQ_BUFF_LEN];
840 dbg(udev, "opening %s\n", devname);
841 fd = open(devname, O_RDONLY | O_NONBLOCK);
843 info(udev, "scsi_id: cannot open %s: %s\n",
844 devname, strerror(errno));
848 if (fstat(fd, &statbuf) < 0) {
849 info(udev, "scsi_id: cannot stat %s: %s\n",
850 devname, strerror(errno));
854 sprintf(dev_scsi->kernel,"%d:%d", major(statbuf.st_rdev),
855 minor(statbuf.st_rdev));
857 memset(buf, 0, SCSI_INQ_BUFF_LEN);
858 err = scsi_inquiry(udev, dev_scsi, fd, 0, 0, buf, SCSI_INQ_BUFF_LEN);
863 memcpy(dev_scsi->vendor, buf + 8, 8);
864 dev_scsi->vendor[8] = '\0';
865 memcpy(dev_scsi->model, buf + 16, 16);
866 dev_scsi->model[16] = '\0';
867 memcpy(dev_scsi->revision, buf + 32, 4);
868 dev_scsi->revision[4] = '\0';
869 sprintf(dev_scsi->type,"%x", buf[0] & 0x1f);
876 int scsi_get_serial(struct udev *udev,
877 struct scsi_id_device *dev_scsi, const char *devname,
878 int page_code, int len)
880 unsigned char page0[SCSI_INQ_BUFF_LEN];
886 memset(dev_scsi->serial, 0, len);
887 dbg(udev, "opening %s\n", devname);
888 srand((unsigned int)getpid());
889 for (cnt = 20; cnt > 0; cnt--) {
890 struct timespec duration;
892 fd = open(devname, O_RDONLY | O_NONBLOCK);
893 if (fd >= 0 || errno != EBUSY)
896 duration.tv_nsec = (200 * 1000 * 1000) + (rand() % 100 * 1000 * 1000);
897 nanosleep(&duration, NULL);
902 if (page_code == PAGE_80) {
903 if (do_scsi_page80_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) {
910 } else if (page_code == PAGE_83) {
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, dev_scsi->tgpt_group)) {
918 } else if (page_code == PAGE_83_PRE_SPC3) {
919 retval = do_scsi_page83_prespc3_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len);
922 * Fallback to servicing a SPC-2/3 compliant page 83
923 * inquiry if the page 83 reply format does not
924 * conform to pre-SPC3 expectations.
927 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)) {
943 } else if (page_code != 0x00) {
944 info(udev, "%s: unsupported page code 0x%d\n", dev_scsi->kernel, page_code);
949 * Get page 0, the page of the pages. By default, try from best to
950 * worst of supported pages: 0x83 then 0x80.
952 if (do_scsi_page0_inquiry(udev, dev_scsi, fd, page0, SCSI_INQ_BUFF_LEN)) {
954 * Don't try anything else. Black list if a specific page
955 * should be used for this vendor+model, or maybe have an
956 * optional fall-back to page 0x80 or page 0x83.
962 dbg(udev, "%s: Checking page0\n", dev_scsi->kernel);
964 for (ind = 4; ind <= page0[3] + 3; ind++)
965 if (page0[ind] == PAGE_83)
966 if (!do_scsi_page83_inquiry(udev, dev_scsi, fd,
967 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)) {
975 for (ind = 4; ind <= page0[3] + 3; ind++)
976 if (page0[ind] == PAGE_80)
977 if (!do_scsi_page80_inquiry(udev, dev_scsi, fd,
978 dev_scsi->serial, dev_scsi->serial_short, len)) {