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target: check DPO/FUA usage for COMPARE AND WRITE

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COMPARE AND WRITE requests should fail if DPO or FUA is set, but the
device is not advertising support.

Signed-off-by: David Disseldorp <ddiss@suse.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
David Disseldorp 2015-07-23 22:33:21 +02:00 committed by Nicholas Bellinger
parent 915270c3ca
commit ab81a5e066
1 changed files with 3 additions and 0 deletions
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3
drivers/target/target_core_sbc.c
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@ -992,6 +992,9 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
" than 1\n", sectors);
return TCM_INVALID_CDB_FIELD;
}
if (sbc_check_dpofua(dev, cmd, cdb))
return TCM_INVALID_CDB_FIELD;
/*
* Double size because we have two buffers, note that
* zero is not an error..