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authorNicholas Bellinger <nab@linux-iscsi.org>2015-02-14 02:29:50 +0000
committerNicholas Bellinger <nab@linux-iscsi.org>2015-02-14 02:54:48 +0000
commit61fdb4acc8411bf50589bc67431ad12e21e7678a (patch)
tree632d2dced5bd55fa3026665a356c7e9ff20b483a /drivers/target
parentd0a91295557666f9e58b79b5177a98229007803b (diff)
target: Fail UNMAP when emulate_tpu=0
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 <martin.petersen@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/target_core_sbc.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index 0d307c34f08e..9661a6626b2d 100644
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -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;