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scsi: target: core: Do not overwrite CDB byte 1
[ Upstream commit 27e84243cb
]
passthrough_parse_cdb() - used by TCMU and PSCSI - attepts to reset the LUN
field of SCSI-2 CDBs (bits 5,6,7 of byte 1). The current code is wrong as
for newer commands not having the LUN field it overwrites relevant command
bits (e.g. for SECURITY PROTOCOL IN / OUT). We think this code was
unnecessary from the beginning or at least it is no longer useful. So we
remove it entirely.
Link: https://lore.kernel.org/r/12498eab-76fd-eaad-1316-c2827badb76a@ts.fujitsu.com
Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -1151,27 +1151,6 @@ passthrough_parse_cdb(struct se_cmd *cmd,
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struct se_device *dev = cmd->se_dev;
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unsigned int size;
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/*
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* Clear a lun set in the cdb if the initiator talking to use spoke
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* and old standards version, as we can't assume the underlying device
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* won't choke up on it.
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*/
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switch (cdb[0]) {
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case READ_10: /* SBC - RDProtect */
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case READ_12: /* SBC - RDProtect */
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case READ_16: /* SBC - RDProtect */
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case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */
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case VERIFY: /* SBC - VRProtect */
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case VERIFY_16: /* SBC - VRProtect */
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case WRITE_VERIFY: /* SBC - VRProtect */
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case WRITE_VERIFY_12: /* SBC - VRProtect */
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case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */
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break;
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default:
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cdb[1] &= 0x1f; /* clear logical unit number */
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break;
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}
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/*
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* For REPORT LUNS we always need to emulate the response, for everything
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* else, pass it up.
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