target/sbc: Seperate WRITE_SAME based on UNMAP flag in sbc_ops

This patch adds a new sbc_ops->execute_write_same_unmap() caller for use
with WRITE_SAME w/ UNMAP=1, and performs the ->execute_cmd() setup based
this bit within sbc_setup_write_same() code.

Also, makes the changes in sbc_parse_cdb() to handle a sense_reason_t
return from sbc_setup_write_same() on error.

Reported-by: Christoph Hellwig <hch@lst.de>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/target/target_core_backend.h b/include/target/target_core_backend.h
index aa868090b9ab..3393ab10766c 100644
--- a/include/target/target_core_backend.h
+++ b/include/target/target_core_backend.h
@@ -41,6 +41,7 @@ struct sbc_ops {
         sense_reason_t (*execute_rw)(struct se_cmd *cmd);
         sense_reason_t (*execute_sync_cache)(struct se_cmd *cmd);
         sense_reason_t (*execute_write_same)(struct se_cmd *cmd);
+        sense_reason_t (*execute_write_same_unmap)(struct se_cmd *cmd);
         sense_reason_t (*execute_unmap)(struct se_cmd *cmd);
 };