4 * Code related to requesting and getting an id from a scsi device
6 * Copyright (C) IBM Corp. 2003
9 * Patrick Mansfield<patmans@us.ibm.com>
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation version 2 of the License.
16 #include <sys/types.h>
17 #include <sys/ioctl.h>
27 #include "../../udev.h"
30 #include "scsi_id_version.h"
33 * A priority based list of id, naa, and binary/ascii for the identifier
34 * descriptor in VPD page 0x83.
36 * Brute force search for a match starting with the first value in the
37 * following id_search_list. This is not a performance issue, since there
38 * is normally one or some small number of descriptors.
40 static const struct scsi_id_search_values id_search_list
[] = {
41 { SCSI_ID_NAA
, SCSI_ID_NAA_IEEE_REG_EXTENDED
, SCSI_ID_BINARY
},
42 { SCSI_ID_NAA
, SCSI_ID_NAA_IEEE_REG_EXTENDED
, SCSI_ID_ASCII
},
43 { SCSI_ID_NAA
, SCSI_ID_NAA_IEEE_REG
, SCSI_ID_BINARY
},
44 { SCSI_ID_NAA
, SCSI_ID_NAA_IEEE_REG
, SCSI_ID_ASCII
},
46 * Devices already exist using NAA values that are now marked
47 * reserved. These should not conflict with other values, or it is
48 * a bug in the device. As long as we find the IEEE extended one
49 * first, we really don't care what other ones are used. Using
50 * don't care here means that a device that returns multiple
51 * non-IEEE descriptors in a random order will get different
54 { SCSI_ID_NAA
, SCSI_ID_NAA_DONT_CARE
, SCSI_ID_BINARY
},
55 { SCSI_ID_NAA
, SCSI_ID_NAA_DONT_CARE
, SCSI_ID_ASCII
},
56 { SCSI_ID_EUI_64
, SCSI_ID_NAA_DONT_CARE
, SCSI_ID_BINARY
},
57 { SCSI_ID_EUI_64
, SCSI_ID_NAA_DONT_CARE
, SCSI_ID_ASCII
},
58 { SCSI_ID_T10_VENDOR
, SCSI_ID_NAA_DONT_CARE
, SCSI_ID_BINARY
},
59 { SCSI_ID_T10_VENDOR
, SCSI_ID_NAA_DONT_CARE
, SCSI_ID_ASCII
},
60 { SCSI_ID_VENDOR_SPECIFIC
, SCSI_ID_NAA_DONT_CARE
, SCSI_ID_BINARY
},
61 { SCSI_ID_VENDOR_SPECIFIC
, SCSI_ID_NAA_DONT_CARE
, SCSI_ID_ASCII
},
64 static const char hex_str
[]="0123456789abcdef";
67 * Values returned in the result/status, only the ones used by the code
71 #define DID_NO_CONNECT 0x01 /* Unable to connect before timeout */
72 #define DID_BUS_BUSY 0x02 /* Bus remain busy until timeout */
73 #define DID_TIME_OUT 0x03 /* Timed out for some other reason */
74 #define DRIVER_TIMEOUT 0x06
75 #define DRIVER_SENSE 0x08 /* Sense_buffer has been set */
77 /* The following "category" function returns one of the following */
78 #define SG_ERR_CAT_CLEAN 0 /* No errors or other information */
79 #define SG_ERR_CAT_MEDIA_CHANGED 1 /* interpreted from sense buffer */
80 #define SG_ERR_CAT_RESET 2 /* interpreted from sense buffer */
81 #define SG_ERR_CAT_TIMEOUT 3
82 #define SG_ERR_CAT_RECOVERED 4 /* Successful command after recovered err */
83 #define SG_ERR_CAT_NOTSUPPORTED 5 /* Illegal / unsupported command */
84 #define SG_ERR_CAT_SENSE 98 /* Something else in the sense buffer */
85 #define SG_ERR_CAT_OTHER 99 /* Some other error/warning */
87 static int sg_err_category_new(int scsi_status
, int msg_status
, int
88 host_status
, int driver_status
, const
89 unsigned char *sense_buffer
, int sb_len
)
94 * XXX change to return only two values - failed or OK.
100 if (!scsi_status
&& !msg_status
&& !host_status
&& !driver_status
)
101 return SG_ERR_CAT_CLEAN
;
103 if ((scsi_status
== SCSI_CHECK_CONDITION
) ||
104 (scsi_status
== SCSI_COMMAND_TERMINATED
) ||
105 ((driver_status
& 0xf) == DRIVER_SENSE
)) {
106 if (sense_buffer
&& (sb_len
> 2)) {
110 if (sense_buffer
[0] & 0x2) {
111 sense_key
= sense_buffer
[1] & 0xf;
112 asc
= sense_buffer
[2];
114 sense_key
= sense_buffer
[2] & 0xf;
115 asc
= (sb_len
> 12) ? sense_buffer
[12] : 0;
118 if (sense_key
== RECOVERED_ERROR
)
119 return SG_ERR_CAT_RECOVERED
;
120 else if (sense_key
== UNIT_ATTENTION
) {
122 return SG_ERR_CAT_MEDIA_CHANGED
;
124 return SG_ERR_CAT_RESET
;
125 } else if (sense_key
== ILLEGAL_REQUEST
) {
126 return SG_ERR_CAT_NOTSUPPORTED
;
129 return SG_ERR_CAT_SENSE
;
132 if ((host_status
== DID_NO_CONNECT
) ||
133 (host_status
== DID_BUS_BUSY
) ||
134 (host_status
== DID_TIME_OUT
))
135 return SG_ERR_CAT_TIMEOUT
;
137 if (!driver_status
) {
138 if (driver_status
== DRIVER_TIMEOUT
)
139 return SG_ERR_CAT_TIMEOUT
;
141 return SG_ERR_CAT_OTHER
;
144 static int sg_err_category3(struct sg_io_hdr
*hp
)
146 return sg_err_category_new(hp
->status
, hp
->msg_status
,
147 hp
->host_status
, hp
->driver_status
,
148 hp
->sbp
, hp
->sb_len_wr
);
151 static int scsi_dump_sense(struct sysfs_device
*dev_scsi
, struct sg_io_hdr
*io
)
153 unsigned char *sense_buffer
;
159 int descriptor_format
;
162 char out_buffer
[256];
167 * Figure out and print the sense key, asc and ascq.
169 * If you want to suppress these for a particular drive model, add
170 * a black list entry in the scsi_id config file.
172 * XXX We probably need to: lookup the sense/asc/ascq in a retry
173 * table, and if found return 1 (after dumping the sense, asc, and
174 * ascq). So, if/when we get something like a power on/reset,
175 * we'll retry the command.
178 dbg("got check condition\n");
180 sb_len
= io
->sb_len_wr
;
182 info("%s: sense buffer empty", dev_scsi
->kernel
);
186 sense_buffer
= io
->sbp
;
187 sense_class
= (sense_buffer
[0] >> 4) & 0x07;
188 code
= sense_buffer
[0] & 0xf;
190 if (sense_class
== 7) {
192 * extended sense data.
194 s
= sense_buffer
[7] + 8;
196 info("%s: sense buffer too small %d bytes, %d bytes too short",
197 dev_scsi
->kernel
, sb_len
, s
- sb_len
);
200 if ((code
== 0x0) || (code
== 0x1)) {
201 descriptor_format
= 0;
202 sense_key
= sense_buffer
[2] & 0xf;
207 info("%s: sense result too" " small %d bytes",
208 dev_scsi
->kernel
, s
);
211 asc
= sense_buffer
[12];
212 ascq
= sense_buffer
[13];
213 } else if ((code
== 0x2) || (code
== 0x3)) {
214 descriptor_format
= 1;
215 sense_key
= sense_buffer
[1] & 0xf;
216 asc
= sense_buffer
[2];
217 ascq
= sense_buffer
[3];
219 info("%s: invalid sense code 0x%x",
220 dev_scsi
->kernel
, code
);
223 info("%s: sense key 0x%x ASC 0x%x ASCQ 0x%x",
224 dev_scsi
->kernel
, sense_key
, asc
, ascq
);
227 info("%s: sense buffer too small %d bytes, %d bytes too short",
228 dev_scsi
->kernel
, sb_len
, 4 - sb_len
);
232 if (sense_buffer
[0] < 15)
233 info("%s: old sense key: 0x%x", dev_scsi
->kernel
, sense_buffer
[0] & 0x0f);
235 info("%s: sense = %2x %2x",
236 dev_scsi
->kernel
, sense_buffer
[0], sense_buffer
[2]);
237 info("%s: non-extended sense class %d code 0x%0x",
238 dev_scsi
->kernel
, sense_class
, code
);
243 for (i
= 0, j
= 0; (i
< s
) && (j
< 254); i
++) {
244 dbg("i %d, j %d\n", i
, j
);
245 out_buffer
[j
++] = hex_str
[(sense_buffer
[i
] & 0xf0) >> 4];
246 out_buffer
[j
++] = hex_str
[sense_buffer
[i
] & 0x0f];
247 out_buffer
[j
++] = ' ';
249 out_buffer
[j
] = '\0';
250 info("%s: sense dump:", dev_scsi
->kernel
);
251 info("%s: %s", dev_scsi
->kernel
, out_buffer
);
257 static int scsi_dump(struct sysfs_device
*dev_scsi
, struct sg_io_hdr
*io
)
259 if (!io
->status
&& !io
->host_status
&& !io
->msg_status
&&
260 !io
->driver_status
) {
262 * Impossible, should not be called.
264 info("%s: called with no error", __FUNCTION__
);
268 info("%s: sg_io failed status 0x%x 0x%x 0x%x 0x%x",
269 dev_scsi
->kernel
, io
->driver_status
, io
->host_status
, io
->msg_status
, io
->status
);
270 if (io
->status
== SCSI_CHECK_CONDITION
)
271 return scsi_dump_sense(dev_scsi
, io
);
276 static int scsi_inquiry(struct sysfs_device
*dev_scsi
, int fd
,
277 unsigned char evpd
, unsigned char page
,
278 unsigned char *buf
, unsigned int buflen
)
280 unsigned char inq_cmd
[INQUIRY_CMDLEN
] =
281 { INQUIRY_CMD
, evpd
, page
, 0, buflen
, 0 };
282 unsigned char sense
[SENSE_BUFF_LEN
];
283 struct sg_io_hdr io_hdr
;
285 int retry
= 3; /* rather random */
287 if (buflen
> SCSI_INQ_BUFF_LEN
) {
288 info("buflen %d too long", buflen
);
293 dbg("%s evpd %d, page 0x%x\n", dev_scsi
->kernel
, evpd
, page
);
295 memset(&io_hdr
, 0, sizeof(struct sg_io_hdr
));
296 io_hdr
.interface_id
= 'S';
297 io_hdr
.cmd_len
= sizeof(inq_cmd
);
298 io_hdr
.mx_sb_len
= sizeof(sense
);
299 io_hdr
.dxfer_direction
= SG_DXFER_FROM_DEV
;
300 io_hdr
.dxfer_len
= buflen
;
302 io_hdr
.cmdp
= inq_cmd
;
304 io_hdr
.timeout
= DEF_TIMEOUT
;
306 if (ioctl(fd
, SG_IO
, &io_hdr
) < 0) {
307 info("%s: ioctl failed: %s", dev_scsi
->kernel
, strerror(errno
));
312 retval
= sg_err_category3(&io_hdr
);
315 case SG_ERR_CAT_NOTSUPPORTED
:
318 case SG_ERR_CAT_CLEAN
:
319 case SG_ERR_CAT_RECOVERED
:
324 retval
= scsi_dump(dev_scsi
, &io_hdr
);
329 } else if (retval
> 0) {
331 dbg("%s: Retrying ...\n", dev_scsi
->kernel
);
339 info("%s: Unable to get INQUIRY vpd %d page 0x%x.",
340 dev_scsi
->kernel
, evpd
, page
);
345 /* Get list of supported EVPD pages */
346 static int do_scsi_page0_inquiry(struct sysfs_device
*dev_scsi
, int fd
,
347 unsigned char *buffer
, unsigned int len
)
352 memset(buffer
, 0, len
);
353 retval
= scsi_inquiry(dev_scsi
, fd
, 1, 0x0, buffer
, len
);
357 if (buffer
[1] != 0) {
358 info("%s: page 0 not available.", dev_scsi
->kernel
);
361 if (buffer
[3] > len
) {
362 info("%s: page 0 buffer too long %d", dev_scsi
->kernel
, buffer
[3]);
367 * Following check is based on code once included in the 2.5.x
370 * Some ill behaved devices return the standard inquiry here
371 * rather than the evpd data, snoop the data to verify.
373 if (buffer
[3] > MODEL_LENGTH
) {
375 * If the vendor id appears in the page assume the page is
378 vendor
= sysfs_attr_get_value(dev_scsi
->devpath
, "vendor");
380 info("%s: cannot get model attribute", dev_scsi
->kernel
);
383 if (!strncmp((char *)&buffer
[VENDOR_LENGTH
], vendor
, VENDOR_LENGTH
)) {
384 info("%s: invalid page0 data", dev_scsi
->kernel
);
392 * The caller checks that serial is long enough to include the vendor +
395 static int prepend_vendor_model(struct sysfs_device
*dev_scsi
, char *serial
)
400 attr
= sysfs_attr_get_value(dev_scsi
->devpath
, "vendor");
402 info("%s: cannot get vendor attribute", dev_scsi
->kernel
);
405 strncpy(serial
, attr
, VENDOR_LENGTH
);
406 ind
= strlen(serial
) - 1;
408 attr
= sysfs_attr_get_value(dev_scsi
->devpath
, "model");
410 info("%s: cannot get model attribute", dev_scsi
->kernel
);
413 strncat(serial
, attr
, MODEL_LENGTH
);
414 ind
= strlen(serial
) - 1;
418 * This is not a complete check, since we are using strncat/cpy
419 * above, ind will never be too large.
421 if (ind
!= (VENDOR_LENGTH
+ MODEL_LENGTH
)) {
422 info("%s: expected length %d, got length %d",
423 dev_scsi
->kernel
, (VENDOR_LENGTH
+ MODEL_LENGTH
), ind
);
430 * check_fill_0x83_id - check the page 0x83 id, if OK allocate and fill
433 static int check_fill_0x83_id(struct sysfs_device
*dev_scsi
,
434 unsigned char *page_83
,
435 const struct scsi_id_search_values
436 *id_search
, char *serial
, char *serial_short
, int max_len
)
441 * ASSOCIATION must be with the device (value 0)
443 if ((page_83
[1] & 0x30) != 0)
446 if ((page_83
[1] & 0x0f) != id_search
->id_type
)
450 * Possibly check NAA sub-type.
452 if ((id_search
->naa_type
!= SCSI_ID_NAA_DONT_CARE
) &&
453 (id_search
->naa_type
!= (page_83
[4] & 0xf0) >> 4))
457 * Check for matching code set - ASCII or BINARY.
459 if ((page_83
[0] & 0x0f) != id_search
->code_set
)
463 * page_83[3]: identifier length
466 if ((page_83
[0] & 0x0f) != SCSI_ID_ASCII
)
468 * If not ASCII, use two bytes for each binary value.
473 * Add one byte for the NUL termination, and one for the id_type.
476 if (id_search
->id_type
== SCSI_ID_VENDOR_SPECIFIC
)
477 len
+= VENDOR_LENGTH
+ MODEL_LENGTH
;
480 info("%s: length %d too short - need %d",
481 dev_scsi
->kernel
, max_len
, len
);
485 serial
[0] = hex_str
[id_search
->id_type
];
488 * For SCSI_ID_VENDOR_SPECIFIC prepend the vendor and model before
489 * the id since it is not unique across all vendors and models,
490 * this differs from SCSI_ID_T10_VENDOR, where the vendor is
491 * included in the identifier.
493 if (id_search
->id_type
== SCSI_ID_VENDOR_SPECIFIC
)
494 if (prepend_vendor_model(dev_scsi
, &serial
[1]) < 0) {
495 dbg("prepend failed\n");
499 i
= 4; /* offset to the start of the identifier */
500 s
= j
= strlen(serial
);
501 if ((page_83
[0] & 0x0f) == SCSI_ID_ASCII
) {
505 while (i
< (4 + page_83
[3]))
506 serial
[j
++] = page_83
[i
++];
509 * Binary descriptor, convert to ASCII, using two bytes of
510 * ASCII for each byte in the page_83.
512 while (i
< (4 + page_83
[3])) {
513 serial
[j
++] = hex_str
[(page_83
[i
] & 0xf0) >> 4];
514 serial
[j
++] = hex_str
[page_83
[i
] & 0x0f];
519 strcpy(serial_short
, &serial
[s
]);
523 /* Extract the raw binary from VPD 0x83 pre-SPC devices */
524 static int check_fill_0x83_prespc3(struct sysfs_device
*dev_scsi
,
525 unsigned char *page_83
,
526 const struct scsi_id_search_values
527 *id_search
, char *serial
, char *serial_short
, int max_len
)
531 dbg("using pre-spc3-83 for %s.\n", dev_scsi
->kernel
);
532 serial
[0] = hex_str
[id_search
->id_type
];
533 /* serial has been memset to zero before */
534 j
= strlen(serial
); /* j = 1; */
536 for (i
= 0; i
< page_83
[3]; ++i
) {
537 serial
[j
++] = hex_str
[(page_83
[4+i
] & 0xf0) >> 4];
538 serial
[j
++] = hex_str
[ page_83
[4+i
] & 0x0f];
540 strcpy(serial_short
, serial
);
545 /* Get device identification VPD page */
546 static int do_scsi_page83_inquiry(struct sysfs_device
*dev_scsi
, int fd
,
547 char *serial
, char *serial_short
, int len
)
550 unsigned int id_ind
, j
;
551 unsigned char page_83
[SCSI_INQ_BUFF_LEN
];
553 memset(page_83
, 0, SCSI_INQ_BUFF_LEN
);
554 retval
= scsi_inquiry(dev_scsi
, fd
, 1, PAGE_83
, page_83
,
559 if (page_83
[1] != PAGE_83
) {
560 info("%s: Invalid page 0x83", dev_scsi
->kernel
);
565 * XXX Some devices (IBM 3542) return all spaces for an identifier if
566 * the LUN is not actually configured. This leads to identifers of
571 * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
572 * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
574 * The SCSI-2 page 83 format returns an IEEE WWN in binary
575 * encoded hexi-decimal in the 16 bytes following the initial
576 * 4-byte page 83 reply header.
578 * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
579 * of an Identification descriptor. The 3rd byte of the first
580 * Identification descriptor is a reserved (BSZ) byte field.
582 * Reference the 7th byte of the page 83 reply to determine
583 * whether the reply is compliant with SCSI-2 or SPC-2/3
584 * specifications. A zero value in the 7th byte indicates
585 * an SPC-2/3 conformant reply, (i.e., the reserved field of the
586 * first Identification descriptor). This byte will be non-zero
587 * for a SCSI-2 conformant page 83 reply from these EMC
588 * Symmetrix models since the 7th byte of the reply corresponds
589 * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
594 return check_fill_0x83_prespc3(dev_scsi
, page_83
, id_search_list
,
595 serial
, serial_short
, len
);
598 * Search for a match in the prioritized id_search_list.
601 id_ind
< sizeof(id_search_list
)/sizeof(id_search_list
[0]);
604 * Examine each descriptor returned. There is normally only
605 * one or a small number of descriptors.
607 for (j
= 4; j
<= (unsigned int)page_83
[3] + 3; j
+= page_83
[j
+ 3] + 4) {
608 retval
= check_fill_0x83_id(dev_scsi
, &page_83
[j
],
609 &id_search_list
[id_ind
],
610 serial
, serial_short
, len
);
611 dbg("%s id desc %d/%d/%d\n", dev_scsi
->kernel
,
612 id_search_list
[id_ind
].id_type
,
613 id_search_list
[id_ind
].naa_type
,
614 id_search_list
[id_ind
].code_set
);
618 } else if (retval
< 0) {
630 * Get device identification VPD page for older SCSI-2 device which is not
631 * compliant with either SPC-2 or SPC-3 format.
633 * Return the hard coded error code value 2 if the page 83 reply is not
634 * conformant to the SCSI-2 format.
636 static int do_scsi_page83_prespc3_inquiry(struct sysfs_device
*dev_scsi
, int fd
,
637 char *serial
, char *serial_short
, int len
)
641 unsigned char page_83
[SCSI_INQ_BUFF_LEN
];
643 memset(page_83
, 0, SCSI_INQ_BUFF_LEN
);
644 retval
= scsi_inquiry(dev_scsi
, fd
, 1, PAGE_83
, page_83
, SCSI_INQ_BUFF_LEN
);
648 if (page_83
[1] != PAGE_83
) {
649 info("%s: Invalid page 0x83", dev_scsi
->kernel
);
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,
677 serial
[0] = hex_str
[id_search_list
[0].id_type
];
679 * The first four bytes contain data, not a descriptor.
684 * Binary descriptor, convert to ASCII,
685 * using two bytes of ASCII for each byte
688 while (i
< (page_83
[3]+4)) {
689 serial
[j
++] = hex_str
[(page_83
[i
] & 0xf0) >> 4];
690 serial
[j
++] = hex_str
[page_83
[i
] & 0x0f];
693 dbg("using pre-spc3-83 for %s.\n", dev_scsi
->kernel
);
697 /* Get unit serial number VPD page */
698 static int do_scsi_page80_inquiry(struct sysfs_device
*dev_scsi
, int fd
,
699 char *serial
, char *serial_short
, int max_len
)
705 unsigned char buf
[SCSI_INQ_BUFF_LEN
];
707 memset(buf
, 0, SCSI_INQ_BUFF_LEN
);
708 retval
= scsi_inquiry(dev_scsi
, fd
, 1, PAGE_80
, buf
, SCSI_INQ_BUFF_LEN
);
712 if (buf
[1] != PAGE_80
) {
713 info("%s: Invalid page 0x80", dev_scsi
->kernel
);
717 len
= 1 + VENDOR_LENGTH
+ MODEL_LENGTH
+ buf
[3];
719 info("%s: length %d too short - need %d",
720 dev_scsi
->kernel
, max_len
, len
);
724 * Prepend 'S' to avoid unlikely collision with page 0x83 vendor
725 * specific type where we prepend '0' + vendor + model.
728 ser_ind
= prepend_vendor_model(dev_scsi
, &serial
[1]);
732 for (i
= 4; i
< len
+ 4; i
++, ser_ind
++)
733 serial
[ser_ind
] = buf
[i
];
734 memcpy(serial_short
, &buf
[4], len
);
735 serial_short
[len
] = '\0';
739 int scsi_std_inquiry(struct sysfs_device
*dev_scsi
, const char *devname
,
740 char *vendor
, char *model
, char *rev
, char *type
)
744 unsigned char buf
[SCSI_INQ_BUFF_LEN
];
746 dbg("opening %s\n", devname
);
747 fd
= open(devname
, O_RDONLY
| O_NONBLOCK
);
749 info("%s: cannot open %s: %s",
750 dev_scsi
->kernel
, devname
, strerror(errno
));
754 memset(buf
, 0, SCSI_INQ_BUFF_LEN
);
755 retval
= scsi_inquiry(dev_scsi
, fd
, 0, 0, buf
, SCSI_INQ_BUFF_LEN
);
759 memcpy(vendor
, buf
+ 8, 8);
760 memcpy(model
, buf
+ 16, 16);
761 memcpy(rev
, buf
+ 32, 4);
762 sprintf(type
,"%x", buf
[0] & 0x1f);
765 info("%s: close failed: %s", dev_scsi
->kernel
, strerror(errno
));
770 int scsi_get_serial (struct sysfs_device
*dev_scsi
, const char *devname
,
771 int page_code
, char *serial
, char *serial_short
, int len
)
773 unsigned char page0
[SCSI_INQ_BUFF_LEN
];
778 memset(serial
, 0, len
);
779 dbg("opening %s\n", devname
);
780 fd
= open(devname
, O_RDONLY
| O_NONBLOCK
);
782 info("%s: cannot open %s: %s",
783 dev_scsi
->kernel
, devname
, strerror(errno
));
787 if (page_code
== PAGE_80
) {
788 if (do_scsi_page80_inquiry(dev_scsi
, fd
, serial
, serial_short
, len
)) {
795 } else if (page_code
== PAGE_83
) {
796 if (do_scsi_page83_inquiry(dev_scsi
, fd
, serial
, serial_short
, len
)) {
803 } else if (page_code
== PAGE_83_PRE_SPC3
) {
804 retval
= do_scsi_page83_prespc3_inquiry(dev_scsi
, fd
, serial
, serial_short
, len
);
807 * Fallback to servicing a SPC-2/3 compliant page 83
808 * inquiry if the page 83 reply format does not
809 * conform to pre-SPC3 expectations.
812 if (do_scsi_page83_inquiry(dev_scsi
, fd
, serial
, serial_short
, len
)) {
828 } else if (page_code
!= 0x00) {
829 info("%s: unsupported page code 0x%d", dev_scsi
->kernel
, page_code
);
834 * Get page 0, the page of the pages. By default, try from best to
835 * worst of supported pages: 0x83 then 0x80.
837 if (do_scsi_page0_inquiry(dev_scsi
, fd
, page0
, SCSI_INQ_BUFF_LEN
)) {
839 * Don't try anything else. Black list if a specific page
840 * should be used for this vendor+model, or maybe have an
841 * optional fall-back to page 0x80 or page 0x83.
847 dbg("%s: Checking page0\n", dev_scsi
->kernel
);
849 for (ind
= 4; ind
<= page0
[3] + 3; ind
++)
850 if (page0
[ind
] == PAGE_83
)
851 if (!do_scsi_page83_inquiry(dev_scsi
, fd
,
852 serial
, serial_short
, len
)) {
860 for (ind
= 4; ind
<= page0
[3] + 3; ind
++)
861 if (page0
[ind
] == PAGE_80
)
862 if (!do_scsi_page80_inquiry(dev_scsi
, fd
,
863 serial
, serial_short
, len
)) {
873 info("%s: close failed: %s", dev_scsi
->kernel
, strerror(errno
));