From: Mike Christie <michaelc@xxxxxxxxxxx>
Add a sbc ops callout for compare and write commands, so backends
like rbd which support that commmand can execute it natively.
Signed-off-by: Mike Christie <michaelc@xxxxxxxxxxx>
---
drivers/target/target_core_sbc.c | 9 +++++++--
include/target/target_core_backend.h | 1 +
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index e318ddb..9a001e6 100644
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -968,8 +968,13 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
cmd->t_task_lba = get_unaligned_be64(&cdb[2]);
cmd->t_task_nolb = sectors;
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB | SCF_COMPARE_AND_WRITE;
- cmd->execute_cmd = sbc_compare_and_write;
- cmd->transport_complete_callback = compare_and_write_callback;
+ if (ops->execute_compare_and_write) {
+ cmd->execute_cmd = ops->execute_compare_and_write;
+ } else {
+ cmd->execute_cmd = sbc_compare_and_write;
+ cmd->transport_complete_callback =
+ compare_and_write_callback;
+ }
break;
case READ_CAPACITY:
size = READ_CAP_LEN;
diff --git a/include/target/target_core_backend.h b/include/target/target_core_backend.h
index 1e5c8f9..ec5a09f 100644
--- a/include/target/target_core_backend.h
+++ b/include/target/target_core_backend.h
@@ -51,6 +51,7 @@ struct sbc_ops {
sense_reason_t (*execute_write_same)(struct se_cmd *cmd);
sense_reason_t (*execute_unmap)(struct se_cmd *cmd,
sector_t lba, sector_t nolb);
+ sense_reason_t (*execute_compare_and_write)(struct se_cmd *cmd);
};
int transport_backend_register(const struct target_backend_ops *);
--
1.8.3.1
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