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_NAA, SCSI_ID_NAA_IEEE_REG_EXTENDED, SCSI_ID_BINARY },
52 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG_EXTENDED, SCSI_ID_ASCII },
53 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG, SCSI_ID_BINARY },
54 { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG, SCSI_ID_ASCII },
56 * Devices already exist using NAA values that are now marked
57 * reserved. These should not conflict with other values, or it is
58 * a bug in the device. As long as we find the IEEE extended one
59 * first, we really don't care what other ones are used. Using
60 * don't care here means that a device that returns multiple
61 * non-IEEE descriptors in a random order will get different
64 { SCSI_ID_NAA, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
65 { SCSI_ID_NAA, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
66 { SCSI_ID_EUI_64, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
67 { SCSI_ID_EUI_64, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
68 { SCSI_ID_T10_VENDOR, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
69 { SCSI_ID_T10_VENDOR, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
70 { SCSI_ID_VENDOR_SPECIFIC, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
71 { SCSI_ID_VENDOR_SPECIFIC, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII },
74 static const char hex_str[]="0123456789abcdef";
77 * Values returned in the result/status, only the ones used by the code
81 #define DID_NO_CONNECT 0x01 /* Unable to connect before timeout */
82 #define DID_BUS_BUSY 0x02 /* Bus remain busy until timeout */
83 #define DID_TIME_OUT 0x03 /* Timed out for some other reason */
84 #define DRIVER_TIMEOUT 0x06
85 #define DRIVER_SENSE 0x08 /* Sense_buffer has been set */
87 /* The following "category" function returns one of the following */
88 #define SG_ERR_CAT_CLEAN 0 /* No errors or other information */
89 #define SG_ERR_CAT_MEDIA_CHANGED 1 /* interpreted from sense buffer */
90 #define SG_ERR_CAT_RESET 2 /* interpreted from sense buffer */
91 #define SG_ERR_CAT_TIMEOUT 3
92 #define SG_ERR_CAT_RECOVERED 4 /* Successful command after recovered err */
93 #define SG_ERR_CAT_NOTSUPPORTED 5 /* Illegal / unsupported command */
94 #define SG_ERR_CAT_SENSE 98 /* Something else in the sense buffer */
95 #define SG_ERR_CAT_OTHER 99 /* Some other error/warning */
97 static int do_scsi_page80_inquiry(struct udev *udev,
98 struct scsi_id_device *dev_scsi, int fd,
99 char *serial, char *serial_short, int max_len);
101 static int sg_err_category_new(struct udev *udev,
102 int scsi_status, int msg_status, int
103 host_status, int driver_status, const
104 unsigned char *sense_buffer, int sb_len)
109 * XXX change to return only two values - failed or OK.
112 if (!scsi_status && !host_status && !driver_status)
113 return SG_ERR_CAT_CLEAN;
115 if ((scsi_status == SCSI_CHECK_CONDITION) ||
116 (scsi_status == SCSI_COMMAND_TERMINATED) ||
117 ((driver_status & 0xf) == DRIVER_SENSE)) {
118 if (sense_buffer && (sb_len > 2)) {
122 if (sense_buffer[0] & 0x2) {
123 sense_key = sense_buffer[1] & 0xf;
124 asc = sense_buffer[2];
126 sense_key = sense_buffer[2] & 0xf;
127 asc = (sb_len > 12) ? sense_buffer[12] : 0;
130 if (sense_key == RECOVERED_ERROR)
131 return SG_ERR_CAT_RECOVERED;
132 else if (sense_key == UNIT_ATTENTION) {
134 return SG_ERR_CAT_MEDIA_CHANGED;
136 return SG_ERR_CAT_RESET;
137 } else if (sense_key == ILLEGAL_REQUEST) {
138 return SG_ERR_CAT_NOTSUPPORTED;
141 return SG_ERR_CAT_SENSE;
144 if ((host_status == DID_NO_CONNECT) ||
145 (host_status == DID_BUS_BUSY) ||
146 (host_status == DID_TIME_OUT))
147 return SG_ERR_CAT_TIMEOUT;
149 if (!driver_status) {
150 if (driver_status == DRIVER_TIMEOUT)
151 return SG_ERR_CAT_TIMEOUT;
153 return SG_ERR_CAT_OTHER;
156 static int sg_err_category3(struct udev *udev, struct sg_io_hdr *hp)
158 return sg_err_category_new(udev,
159 hp->status, hp->msg_status,
160 hp->host_status, hp->driver_status,
161 hp->sbp, hp->sb_len_wr);
164 static int sg_err_category4(struct udev *udev, struct sg_io_v4 *hp)
166 return sg_err_category_new(udev, hp->device_status, 0,
167 hp->transport_status, hp->driver_status,
168 (unsigned char *)(uintptr_t)hp->response,
172 static int scsi_dump_sense(struct udev *udev,
173 struct scsi_id_device *dev_scsi,
174 unsigned char *sense_buffer, int sb_len)
182 char out_buffer[256];
187 * Figure out and print the sense key, asc and ascq.
189 * If you want to suppress these for a particular drive model, add
190 * a black list entry in the scsi_id config file.
192 * XXX We probably need to: lookup the sense/asc/ascq in a retry
193 * table, and if found return 1 (after dumping the sense, asc, and
194 * ascq). So, if/when we get something like a power on/reset,
195 * we'll retry the command.
198 dbg(udev, "got check condition\n");
201 info(udev, "%s: sense buffer empty\n", dev_scsi->kernel);
205 sense_class = (sense_buffer[0] >> 4) & 0x07;
206 code = sense_buffer[0] & 0xf;
208 if (sense_class == 7) {
210 * extended sense data.
212 s = sense_buffer[7] + 8;
214 info(udev, "%s: sense buffer too small %d bytes, %d bytes too short\n",
215 dev_scsi->kernel, sb_len, s - sb_len);
218 if ((code == 0x0) || (code == 0x1)) {
219 sense_key = sense_buffer[2] & 0xf;
224 info(udev, "%s: sense result too" " small %d bytes\n",
225 dev_scsi->kernel, s);
228 asc = sense_buffer[12];
229 ascq = sense_buffer[13];
230 } else if ((code == 0x2) || (code == 0x3)) {
231 sense_key = sense_buffer[1] & 0xf;
232 asc = sense_buffer[2];
233 ascq = sense_buffer[3];
235 info(udev, "%s: invalid sense code 0x%x\n",
236 dev_scsi->kernel, code);
239 info(udev, "%s: sense key 0x%x ASC 0x%x ASCQ 0x%x\n",
240 dev_scsi->kernel, sense_key, asc, ascq);
243 info(udev, "%s: sense buffer too small %d bytes, %d bytes too short\n",
244 dev_scsi->kernel, sb_len, 4 - sb_len);
248 if (sense_buffer[0] < 15)
249 info(udev, "%s: old sense key: 0x%x\n", dev_scsi->kernel, sense_buffer[0] & 0x0f);
251 info(udev, "%s: sense = %2x %2x\n",
252 dev_scsi->kernel, sense_buffer[0], sense_buffer[2]);
253 info(udev, "%s: non-extended sense class %d code 0x%0x\n",
254 dev_scsi->kernel, sense_class, code);
259 for (i = 0, j = 0; (i < s) && (j < 254); i++) {
260 dbg(udev, "i %d, j %d\n", i, j);
261 out_buffer[j++] = hex_str[(sense_buffer[i] & 0xf0) >> 4];
262 out_buffer[j++] = hex_str[sense_buffer[i] & 0x0f];
263 out_buffer[j++] = ' ';
265 out_buffer[j] = '\0';
266 info(udev, "%s: sense dump:\n", dev_scsi->kernel);
267 info(udev, "%s: %s\n", dev_scsi->kernel, out_buffer);
273 static int scsi_dump(struct udev *udev,
274 struct scsi_id_device *dev_scsi, struct sg_io_hdr *io)
276 if (!io->status && !io->host_status && !io->msg_status &&
277 !io->driver_status) {
279 * Impossible, should not be called.
281 info(udev, "%s: called with no error\n", __FUNCTION__);
285 info(udev, "%s: sg_io failed status 0x%x 0x%x 0x%x 0x%x\n",
286 dev_scsi->kernel, io->driver_status, io->host_status, io->msg_status, io->status);
287 if (io->status == SCSI_CHECK_CONDITION)
288 return scsi_dump_sense(udev, dev_scsi, io->sbp, io->sb_len_wr);
293 static int scsi_dump_v4(struct udev *udev,
294 struct scsi_id_device *dev_scsi, struct sg_io_v4 *io)
296 if (!io->device_status && !io->transport_status &&
297 !io->driver_status) {
299 * Impossible, should not be called.
301 info(udev, "%s: called with no error\n", __FUNCTION__);
305 info(udev, "%s: sg_io failed status 0x%x 0x%x 0x%x\n",
306 dev_scsi->kernel, io->driver_status, io->transport_status,
308 if (io->device_status == SCSI_CHECK_CONDITION)
309 return scsi_dump_sense(udev, dev_scsi, (unsigned char *)(uintptr_t)io->response,
315 static int scsi_inquiry(struct udev *udev,
316 struct scsi_id_device *dev_scsi, int fd,
317 unsigned char evpd, unsigned char page,
318 unsigned char *buf, unsigned int buflen)
320 unsigned char inq_cmd[INQUIRY_CMDLEN] =
321 { INQUIRY_CMD, evpd, page, 0, buflen, 0 };
322 unsigned char sense[SENSE_BUFF_LEN];
325 int retry = 3; /* rather random */
327 if (buflen > SCSI_INQ_BUFF_LEN) {
328 info(udev, "buflen %d too long\n", buflen);
333 dbg(udev, "%s evpd %d, page 0x%x\n", dev_scsi->kernel, evpd, page);
335 if (dev_scsi->use_sg == 4) {
336 struct sg_io_v4 io_v4;
338 memset(&io_v4, 0, sizeof(struct sg_io_v4));
340 io_v4.protocol = BSG_PROTOCOL_SCSI;
341 io_v4.subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD;
342 io_v4.request_len = sizeof(inq_cmd);
343 io_v4.request = (uintptr_t)inq_cmd;
344 io_v4.max_response_len = sizeof(sense);
345 io_v4.response = (uintptr_t)sense;
346 io_v4.din_xfer_len = buflen;
347 io_v4.din_xferp = (uintptr_t)buf;
348 io_buf = (void *)&io_v4;
350 struct sg_io_hdr io_hdr;
352 memset(&io_hdr, 0, sizeof(struct sg_io_hdr));
353 io_hdr.interface_id = 'S';
354 io_hdr.cmd_len = sizeof(inq_cmd);
355 io_hdr.mx_sb_len = sizeof(sense);
356 io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
357 io_hdr.dxfer_len = buflen;
359 io_hdr.cmdp = inq_cmd;
361 io_hdr.timeout = DEF_TIMEOUT;
362 io_buf = (void *)&io_hdr;
365 retval = ioctl(fd, SG_IO, io_buf);
367 if ((errno == EINVAL || errno == ENOSYS) && dev_scsi->use_sg == 4) {
368 dev_scsi->use_sg = 3;
371 info(udev, "%s: ioctl failed: %s\n", dev_scsi->kernel, strerror(errno));
375 if (dev_scsi->use_sg == 4)
376 retval = sg_err_category4(udev, io_buf);
378 retval = sg_err_category3(udev, io_buf);
381 case SG_ERR_CAT_NOTSUPPORTED:
384 case SG_ERR_CAT_CLEAN:
385 case SG_ERR_CAT_RECOVERED:
390 if (dev_scsi->use_sg == 4)
391 retval = scsi_dump_v4(udev, dev_scsi, io_buf);
393 retval = scsi_dump(udev, dev_scsi, io_buf);
398 } else if (retval > 0) {
400 dbg(udev, "%s: Retrying ...\n", dev_scsi->kernel);
408 info(udev, "%s: Unable to get INQUIRY vpd %d page 0x%x.\n",
409 dev_scsi->kernel, evpd, page);
414 /* Get list of supported EVPD pages */
415 static int do_scsi_page0_inquiry(struct udev *udev,
416 struct scsi_id_device *dev_scsi, int fd,
417 unsigned char *buffer, unsigned int len)
421 memset(buffer, 0, len);
422 retval = scsi_inquiry(udev, dev_scsi, fd, 1, 0x0, buffer, len);
426 if (buffer[1] != 0) {
427 info(udev, "%s: page 0 not available.\n", dev_scsi->kernel);
430 if (buffer[3] > len) {
431 info(udev, "%s: page 0 buffer too long %d\n", dev_scsi->kernel, buffer[3]);
436 * Following check is based on code once included in the 2.5.x
439 * Some ill behaved devices return the standard inquiry here
440 * rather than the evpd data, snoop the data to verify.
442 if (buffer[3] > MODEL_LENGTH) {
444 * If the vendor id appears in the page assume the page is
447 if (!strncmp((char *)&buffer[VENDOR_LENGTH], dev_scsi->vendor, VENDOR_LENGTH)) {
448 info(udev, "%s: invalid page0 data\n", dev_scsi->kernel);
456 * The caller checks that serial is long enough to include the vendor +
459 static int prepend_vendor_model(struct udev *udev,
460 struct scsi_id_device *dev_scsi, char *serial)
464 strncpy(serial, dev_scsi->vendor, VENDOR_LENGTH);
465 strncat(serial, dev_scsi->model, MODEL_LENGTH);
466 ind = strlen(serial);
469 * This is not a complete check, since we are using strncat/cpy
470 * above, ind will never be too large.
472 if (ind != (VENDOR_LENGTH + MODEL_LENGTH)) {
473 info(udev, "%s: expected length %d, got length %d\n",
474 dev_scsi->kernel, (VENDOR_LENGTH + MODEL_LENGTH), ind);
481 * check_fill_0x83_id - check the page 0x83 id, if OK allocate and fill
484 static int check_fill_0x83_id(struct udev *udev,
485 struct scsi_id_device *dev_scsi,
486 unsigned char *page_83,
487 const struct scsi_id_search_values
488 *id_search, char *serial, char *serial_short, int max_len,
490 char *wwn_vendor_extension)
495 * ASSOCIATION must be with the device (value 0)
497 if ((page_83[1] & 0x30) != 0)
500 if ((page_83[1] & 0x0f) != id_search->id_type)
504 * Possibly check NAA sub-type.
506 if ((id_search->naa_type != SCSI_ID_NAA_DONT_CARE) &&
507 (id_search->naa_type != (page_83[4] & 0xf0) >> 4))
511 * Check for matching code set - ASCII or BINARY.
513 if ((page_83[0] & 0x0f) != id_search->code_set)
517 * page_83[3]: identifier length
520 if ((page_83[0] & 0x0f) != SCSI_ID_ASCII)
522 * If not ASCII, use two bytes for each binary value.
527 * Add one byte for the NUL termination, and one for the id_type.
530 if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC)
531 len += VENDOR_LENGTH + MODEL_LENGTH;
534 info(udev, "%s: length %d too short - need %d\n",
535 dev_scsi->kernel, max_len, len);
539 serial[0] = hex_str[id_search->id_type];
542 * For SCSI_ID_VENDOR_SPECIFIC prepend the vendor and model before
543 * the id since it is not unique across all vendors and models,
544 * this differs from SCSI_ID_T10_VENDOR, where the vendor is
545 * included in the identifier.
547 if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC)
548 if (prepend_vendor_model(udev, dev_scsi, &serial[1]) < 0) {
549 dbg(udev, "prepend failed\n");
553 i = 4; /* offset to the start of the identifier */
554 s = j = strlen(serial);
555 if ((page_83[0] & 0x0f) == SCSI_ID_ASCII) {
559 while (i < (4 + page_83[3]))
560 serial[j++] = page_83[i++];
563 * Binary descriptor, convert to ASCII, using two bytes of
564 * ASCII for each byte in the page_83.
566 while (i < (4 + page_83[3])) {
567 serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4];
568 serial[j++] = hex_str[page_83[i] & 0x0f];
573 strcpy(serial_short, &serial[s]);
575 if (id_search->id_type == SCSI_ID_NAA && wwn != NULL) {
576 strncpy(wwn, &serial[s], 16);
577 if (wwn_vendor_extension != NULL) {
578 strncpy(wwn_vendor_extension, &serial[s + 16], 16);
584 /* Extract the raw binary from VPD 0x83 pre-SPC devices */
585 static int check_fill_0x83_prespc3(struct udev *udev,
586 struct scsi_id_device *dev_scsi,
587 unsigned char *page_83,
588 const struct scsi_id_search_values
589 *id_search, char *serial, char *serial_short, int max_len)
593 dbg(udev, "using pre-spc3-83 for %s\n", dev_scsi->kernel);
594 serial[0] = hex_str[id_search->id_type];
595 /* serial has been memset to zero before */
596 j = strlen(serial); /* j = 1; */
598 for (i = 0; (i < page_83[3]) && (j < max_len-3); ++i) {
599 serial[j++] = hex_str[(page_83[4+i] & 0xf0) >> 4];
600 serial[j++] = hex_str[ page_83[4+i] & 0x0f];
602 serial[max_len-1] = 0;
603 strncpy(serial_short, serial, max_len-1);
608 /* Get device identification VPD page */
609 static int do_scsi_page83_inquiry(struct udev *udev,
610 struct scsi_id_device *dev_scsi, int fd,
611 char *serial, char *serial_short, int len,
612 char *unit_serial_number, char *wwn,
613 char *wwn_vendor_extension)
616 unsigned int id_ind, j;
617 unsigned char page_83[SCSI_INQ_BUFF_LEN];
619 /* also pick up the page 80 serial number */
620 do_scsi_page80_inquiry(udev, dev_scsi, fd, NULL, unit_serial_number, MAX_SERIAL_LEN);
622 memset(page_83, 0, SCSI_INQ_BUFF_LEN);
623 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83,
628 if (page_83[1] != PAGE_83) {
629 info(udev, "%s: Invalid page 0x83\n", dev_scsi->kernel);
634 * XXX Some devices (IBM 3542) return all spaces for an identifier if
635 * the LUN is not actually configured. This leads to identifiers of
640 * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
641 * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
643 * The SCSI-2 page 83 format returns an IEEE WWN in binary
644 * encoded hexi-decimal in the 16 bytes following the initial
645 * 4-byte page 83 reply header.
647 * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
648 * of an Identification descriptor. The 3rd byte of the first
649 * Identification descriptor is a reserved (BSZ) byte field.
651 * Reference the 7th byte of the page 83 reply to determine
652 * whether the reply is compliant with SCSI-2 or SPC-2/3
653 * specifications. A zero value in the 7th byte indicates
654 * an SPC-2/3 conformant reply, (i.e., the reserved field of the
655 * first Identification descriptor). This byte will be non-zero
656 * for a SCSI-2 conformant page 83 reply from these EMC
657 * Symmetrix models since the 7th byte of the reply corresponds
658 * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
663 return check_fill_0x83_prespc3(udev,
664 dev_scsi, page_83, id_search_list,
665 serial, serial_short, len);
668 * Search for a match in the prioritized id_search_list - since WWN ids
669 * come first we can pick up the WWN in check_fill_0x83_id().
672 id_ind < sizeof(id_search_list)/sizeof(id_search_list[0]);
675 * Examine each descriptor returned. There is normally only
676 * one or a small number of descriptors.
678 for (j = 4; j <= (unsigned int)page_83[3] + 3; j += page_83[j + 3] + 4) {
679 retval = check_fill_0x83_id(udev,
680 dev_scsi, &page_83[j],
681 &id_search_list[id_ind],
682 serial, serial_short, len,
684 wwn_vendor_extension);
685 dbg(udev, "%s id desc %d/%d/%d\n", dev_scsi->kernel,
686 id_search_list[id_ind].id_type,
687 id_search_list[id_ind].naa_type,
688 id_search_list[id_ind].code_set);
690 dbg(udev, " used\n");
692 } else if (retval < 0) {
693 dbg(udev, " failed\n");
696 dbg(udev, " not used\n");
704 * Get device identification VPD page for older SCSI-2 device which is not
705 * compliant with either SPC-2 or SPC-3 format.
707 * Return the hard coded error code value 2 if the page 83 reply is not
708 * conformant to the SCSI-2 format.
710 static int do_scsi_page83_prespc3_inquiry(struct udev *udev,
711 struct scsi_id_device *dev_scsi, int fd,
712 char *serial, char *serial_short, int len)
716 unsigned char page_83[SCSI_INQ_BUFF_LEN];
718 memset(page_83, 0, SCSI_INQ_BUFF_LEN);
719 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83, SCSI_INQ_BUFF_LEN);
723 if (page_83[1] != PAGE_83) {
724 info(udev, "%s: Invalid page 0x83\n", dev_scsi->kernel);
728 * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
729 * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
731 * The SCSI-2 page 83 format returns an IEEE WWN in binary
732 * encoded hexi-decimal in the 16 bytes following the initial
733 * 4-byte page 83 reply header.
735 * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
736 * of an Identification descriptor. The 3rd byte of the first
737 * Identification descriptor is a reserved (BSZ) byte field.
739 * Reference the 7th byte of the page 83 reply to determine
740 * whether the reply is compliant with SCSI-2 or SPC-2/3
741 * specifications. A zero value in the 7th byte indicates
742 * an SPC-2/3 conformant reply, (i.e., the reserved field of the
743 * first Identification descriptor). This byte will be non-zero
744 * for a SCSI-2 conformant page 83 reply from these EMC
745 * Symmetrix models since the 7th byte of the reply corresponds
746 * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
752 serial[0] = hex_str[id_search_list[0].id_type];
754 * The first four bytes contain data, not a descriptor.
759 * Binary descriptor, convert to ASCII,
760 * using two bytes of ASCII for each byte
763 while (i < (page_83[3]+4)) {
764 serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4];
765 serial[j++] = hex_str[page_83[i] & 0x0f];
768 dbg(udev, "using pre-spc3-83 for %s\n", dev_scsi->kernel);
772 /* Get unit serial number VPD page */
773 static int do_scsi_page80_inquiry(struct udev *udev,
774 struct scsi_id_device *dev_scsi, int fd,
775 char *serial, char *serial_short, int max_len)
781 unsigned char buf[SCSI_INQ_BUFF_LEN];
783 memset(buf, 0, SCSI_INQ_BUFF_LEN);
784 retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_80, buf, SCSI_INQ_BUFF_LEN);
788 if (buf[1] != PAGE_80) {
789 info(udev, "%s: Invalid page 0x80\n", dev_scsi->kernel);
793 len = 1 + VENDOR_LENGTH + MODEL_LENGTH + buf[3];
795 info(udev, "%s: length %d too short - need %d\n",
796 dev_scsi->kernel, max_len, len);
800 * Prepend 'S' to avoid unlikely collision with page 0x83 vendor
801 * specific type where we prepend '0' + vendor + model.
804 if (serial != NULL) {
806 ser_ind = prepend_vendor_model(udev, dev_scsi, &serial[1]);
809 for (i = 4; i < len + 4; i++, ser_ind++)
810 serial[ser_ind] = buf[i];
812 if (serial_short != NULL) {
813 memcpy(serial_short, &buf[4], len);
814 serial_short[len] = '\0';
819 int scsi_std_inquiry(struct udev *udev,
820 struct scsi_id_device *dev_scsi, const char *devname)
823 unsigned char buf[SCSI_INQ_BUFF_LEN];
827 dbg(udev, "opening %s\n", devname);
828 fd = open(devname, O_RDONLY | O_NONBLOCK);
830 info(udev, "scsi_id: cannot open %s: %s\n",
831 devname, strerror(errno));
835 if (fstat(fd, &statbuf) < 0) {
836 info(udev, "scsi_id: cannot stat %s: %s\n",
837 devname, strerror(errno));
841 sprintf(dev_scsi->kernel,"%d:%d", major(statbuf.st_rdev),
842 minor(statbuf.st_rdev));
844 memset(buf, 0, SCSI_INQ_BUFF_LEN);
845 err = scsi_inquiry(udev, dev_scsi, fd, 0, 0, buf, SCSI_INQ_BUFF_LEN);
850 memcpy(dev_scsi->vendor, buf + 8, 8);
851 dev_scsi->vendor[8] = '\0';
852 memcpy(dev_scsi->model, buf + 16, 16);
853 dev_scsi->model[16] = '\0';
854 memcpy(dev_scsi->revision, buf + 32, 4);
855 dev_scsi->revision[4] = '\0';
856 sprintf(dev_scsi->type,"%x", buf[0] & 0x1f);
863 int scsi_get_serial(struct udev *udev,
864 struct scsi_id_device *dev_scsi, const char *devname,
865 int page_code, int len)
867 unsigned char page0[SCSI_INQ_BUFF_LEN];
873 memset(dev_scsi->serial, 0, len);
874 dbg(udev, "opening %s\n", devname);
875 srand((unsigned int)getpid());
876 for (cnt = 20; cnt > 0; cnt--) {
877 struct timespec duration;
879 fd = open(devname, O_RDONLY | O_NONBLOCK);
880 if (fd >= 0 || errno != EBUSY)
883 duration.tv_nsec = (200 * 1000 * 1000) + (rand() % 100 * 1000 * 1000);
884 nanosleep(&duration, NULL);
889 if (page_code == PAGE_80) {
890 if (do_scsi_page80_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) {
897 } else if (page_code == PAGE_83) {
898 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)) {
905 } else if (page_code == PAGE_83_PRE_SPC3) {
906 retval = do_scsi_page83_prespc3_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len);
909 * Fallback to servicing a SPC-2/3 compliant page 83
910 * inquiry if the page 83 reply format does not
911 * conform to pre-SPC3 expectations.
914 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)) {
930 } else if (page_code != 0x00) {
931 info(udev, "%s: unsupported page code 0x%d\n", dev_scsi->kernel, page_code);
936 * Get page 0, the page of the pages. By default, try from best to
937 * worst of supported pages: 0x83 then 0x80.
939 if (do_scsi_page0_inquiry(udev, dev_scsi, fd, page0, SCSI_INQ_BUFF_LEN)) {
941 * Don't try anything else. Black list if a specific page
942 * should be used for this vendor+model, or maybe have an
943 * optional fall-back to page 0x80 or page 0x83.
949 dbg(udev, "%s: Checking page0\n", dev_scsi->kernel);
951 for (ind = 4; ind <= page0[3] + 3; ind++)
952 if (page0[ind] == PAGE_83)
953 if (!do_scsi_page83_inquiry(udev, dev_scsi, fd,
954 dev_scsi->serial, dev_scsi->serial_short, len, dev_scsi->unit_serial_number, dev_scsi->wwn, dev_scsi->wwn_vendor_extension)) {
962 for (ind = 4; ind <= page0[3] + 3; ind++)
963 if (page0[ind] == PAGE_80)
964 if (!do_scsi_page80_inquiry(udev, dev_scsi, fd,
965 dev_scsi->serial, dev_scsi->serial_short, len)) {