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authorKurt Garloff <garloff@suse.de>2005-12-15 13:01:01 +0100
committerKay Sievers <kay.sievers@suse.de>2005-12-15 13:01:01 +0100
commitcbba4a544628b2f5d78cb15dadbc4e0f73f75eb3 (patch)
tree430901b96194d0799e65cbfe2362541086089689 /extras
parentc756114f8e78f2b7d17ac9f5c3e6cd76e3648601 (diff)
support pre-SPC3 page 83 format
Diffstat (limited to 'extras')
-rw-r--r--extras/scsi_id/scsi_serial.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/extras/scsi_id/scsi_serial.c b/extras/scsi_id/scsi_serial.c
index d1b1d94f53..14955e676c 100644
--- a/extras/scsi_id/scsi_serial.c
+++ b/extras/scsi_id/scsi_serial.c
@@ -558,6 +558,27 @@ static int check_fill_0x83_id(struct sysfs_device *scsi_dev,
return 0;
}
+/* Extract the raw binary from VPD 0x83 pre-SPC devices */
+static int check_fill_0x83_prespc3(struct sysfs_device *scsi_dev,
+ unsigned char *page_83,
+ const struct scsi_id_search_values
+ *id_search, char *serial, int max_len)
+{
+ int i, j;
+
+ serial[0] = hex_str[id_search->id_type];
+ /* serial has been memset to zero before */
+ j = strlen(serial); /* j = 1; */
+
+ for (i = 0; i < page_83[3]; ++i) {
+ serial[j++] = hex_str[(page_83[4+i] & 0xf0) >> 4];
+ serial[j++] = hex_str[ page_83[4+i] & 0x0f];
+ }
+ dprintf("using pre-spc3-83 for %s.\n", scsi_dev->name);
+ return 0;
+}
+
+
/* Get device identification VPD page */
static int do_scsi_page83_inquiry(struct sysfs_device *scsi_dev, int fd,
char *serial, int len)
@@ -585,6 +606,33 @@ static int do_scsi_page83_inquiry(struct sysfs_device *scsi_dev, int fd,
*/
/*
+ * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
+ * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
+ *
+ * The SCSI-2 page 83 format returns an IEEE WWN in binary
+ * encoded hexi-decimal in the 16 bytes following the initial
+ * 4-byte page 83 reply header.
+ *
+ * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
+ * of an Identification descriptor. The 3rd byte of the first
+ * Identification descriptor is a reserved (BSZ) byte field.
+ *
+ * Reference the 7th byte of the page 83 reply to determine
+ * whether the reply is compliant with SCSI-2 or SPC-2/3
+ * specifications. A zero value in the 7th byte indicates
+ * an SPC-2/3 conformant reply, (i.e., the reserved field of the
+ * first Identification descriptor). This byte will be non-zero
+ * for a SCSI-2 conformant page 83 reply from these EMC
+ * Symmetrix models since the 7th byte of the reply corresponds
+ * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
+ * 0x006048.
+ */
+
+ if (page_83[6] != 0)
+ return check_fill_0x83_prespc3(scsi_dev, page_83,
+ id_search_list, serial, len);
+
+ /*
* Search for a match in the prioritized id_search_list.
*/
for (id_ind = 0;