Date: Tue, 8 Oct 2002 12:20:29 -0400 From: "Moore, Eric Dean" <emoore@lsil.com> To: freebsd-scsi@FreeBSD.ORG Subject: CAM:READ-12 and WRITE-12 support Message-ID: <0E3FA95632D6D047BA649F95DAB60E5701528EF0@EXA-ATLANTA.se.lsil.com>
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I'm concerned about 12 byte cdbs support in scsi_read_write() [source
/sys/cam/scsi/scsi_all.c].
For 12 byte cdb's the block_count is being set in
scsi_ulto4b(block_count,scsi_cmd->length);
I think there might be a problem with the location of the length member in
structure scsi_rw_12.
from [sys/cam/scsi/scsi-all.h]
struct scsi_rw_12
{
u_int8_t opcode;
u_int8_t byte2;
u_int8_t addr[4];
u_int8_t reserved;
u_int8_t length[4];
u_int8_t control;
};
According to SCSI-2 spec it should be
struct scsi_rw_12
{
u_int8_t opcode;
u_int8_t byte2;
u_int8_t addr[4];
u_int8_t length[4];
u_int8_t reserved;
u_int8_t control;
};
* should the reserved field should be in bytes 7-10, instead of byte 8-11.
Eric Moore
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