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SES: Correctly interpret element index field when EIIOE=1 #278

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SES: Correctly interpret element index field when EIIOE=1 #278

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SES: Correctly interpret element index field when EIIOE=1
cjs-nexsan Jun 4, 2026
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cjs-nexsan Jun 4, 2026
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9 changes: 8 additions & 1 deletion src/lib/ses.c
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Original file line number Diff line number Diff line change
Expand Up @@ -100,7 +100,7 @@ static void print_page10(struct ses_pages *sp)
printf("\tDescriptor len (x-1): %d\n", ai[1] + 1);
eip = ai[0] & 0x10;
if (eip)
printf("\tElement Index: %d\n", ai[3]);
printf("\tElement Index: %d EIIOE: %d\n", ai[3], (ai[2] & 0x3));
len = ai[1] + 2;
if ((ai[0] & 0xf) == SCSI_PROTOCOL_SAS) {
if (eip)
Expand Down Expand Up @@ -519,6 +519,13 @@ int ses_get_slots(struct ses_pages *sp, struct ses_slot **out_slots, int *out_sl
((uint64_t)addr_p[19]);

slots[j].index = ap[0] & 0x10 ? ap[3] : j;

// If EIIOE=1, ELEMENT INDEX includes overall elements, otherwise not.
// As (Array) Device Slot elements are always first in the list, there
// will be exactly one overall element that needs to be ignored.
if ((ap[0] & 0x10) && ((ap[2] & 0x3) == 0x01))
slots[j].index--;

get_led_status(sp, slots[j].index, &slots[j].ibpi_status);
}

Expand Down