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target: Fail UNMAP when emulate_tpu=0

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This patch adds a check within sbc_parse_cdb() to fail a UNMAP op,
if the backend device has emulate_tpu disabled.

Cc: Martin Petersen <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Signed-off-by: Nicholas Bellinger <[email protected]>
This commit is contained in:
Nicholas Bellinger 2015-02-14 02:29:50 +00:00
commit 61fdb4acc8
1 changed files with 5 additions and 0 deletions
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5
drivers/target/target_core_sbc.c
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@ -962,6 +962,11 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
if (!ops->execute_unmap)
return TCM_UNSUPPORTED_SCSI_OPCODE;
if (!dev->dev_attrib.emulate_tpu) {
pr_err("Got UNMAP, but backend device has"
" emulate_tpu disabled\n");
return TCM_UNSUPPORTED_SCSI_OPCODE;
}
size = get_unaligned_be16(&cdb[7]);
cmd->execute_cmd = ops->execute_unmap;
break;