提交 45182ed5 编写于 作者: B Brian Bunker 提交者: Nicholas Bellinger

target: add support for START_STOP_UNIT SCSI opcode

AIX servers using VIOS servers that virtualize FC cards will have a
problem booting without support for START_STOP_UNIT.

Cite sbc3r36 exactly, clean up if conditions (rob + hch)
Signed-off-by: NBrian Bunker <brian@purestorage.com>
Signed-off-by: NSpencer Baugh <sbaugh@catern.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Cc: "Robert Elliott (Server Storage)" <Elliott@hp.com>
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
上级 568e1f65
......@@ -154,6 +154,38 @@ sbc_emulate_readcapacity_16(struct se_cmd *cmd)
return 0;
}
static sense_reason_t
sbc_emulate_startstop(struct se_cmd *cmd)
{
unsigned char *cdb = cmd->t_task_cdb;
/*
* See sbc3r36 section 5.25
* Immediate bit should be set since there is nothing to complete
* POWER CONDITION MODIFIER 0h
*/
if (!(cdb[1] & 1) || cdb[2] || cdb[3])
return TCM_INVALID_CDB_FIELD;
/*
* See sbc3r36 section 5.25
* POWER CONDITION 0h START_VALID - process START and LOEJ
*/
if (cdb[4] >> 4 & 0xf)
return TCM_INVALID_CDB_FIELD;
/*
* See sbc3r36 section 5.25
* LOEJ 0h - nothing to load or unload
* START 1h - we are ready
*/
if (!(cdb[4] & 1) || (cdb[4] & 2) || (cdb[4] & 4))
return TCM_INVALID_CDB_FIELD;
target_complete_cmd(cmd, SAM_STAT_GOOD);
return 0;
}
sector_t sbc_get_write_same_sectors(struct se_cmd *cmd)
{
u32 num_blocks;
......@@ -1069,6 +1101,10 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
size = 0;
cmd->execute_cmd = sbc_emulate_noop;
break;
case START_STOP:
size = 0;
cmd->execute_cmd = sbc_emulate_startstop;
break;
default:
ret = spc_parse_cdb(cmd, &size);
if (ret)
......
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