target: add struct spc_ops + initial ->execute_rw pointer usage

Remove the execute_cmd method in struct se_subsystem_api, and always use the
one directly in struct se_cmd.  To make life simpler for SBC virtual backends
a struct spc_ops that is passed to sbc_parse_cmd is added.  For now it
only contains an execute_rw member, but more will follow with the subsequent
commits.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

1 files changed, 5 insertions, 3 deletions

diff --git a/include/target/target_core_backend.h b/include/target/target_core_backend.h
index 24d2004f0d12..9b4f2c92ed53 100644
--- a/include/target/target_core_backend.h
+++ b/include/target/target_core_backend.h
@@ -26,8 +26,6 @@ struct se_subsystem_api {
         int (*transport_complete)(struct se_cmd *cmd, struct scatterlist *);
 
         int (*parse_cdb)(struct se_cmd *cmd);
-        int (*execute_cmd)(struct se_cmd *, struct scatterlist *, u32,
-                        enum dma_data_direction);
         int (*do_discard)(struct se_device *, sector_t, u32);
         void (*do_sync_cache)(struct se_cmd *);
         ssize_t (*check_configfs_dev_params)(struct se_hba *,
@@ -42,6 +40,10 @@ struct se_subsystem_api {
         unsigned char *(*get_sense_buffer)(struct se_cmd *);
 };
 
+struct spc_ops {
+        int (*execute_rw)(struct se_cmd *cmd);
+};
+
 int     transport_subsystem_register(struct se_subsystem_api *);
 void    transport_subsystem_release(struct se_subsystem_api *);
 
@@ -51,7 +53,7 @@ struct se_device *transport_add_device_to_core_hba(struct se_hba *,
 
 void    target_complete_cmd(struct se_cmd *, u8);
 
-int     sbc_parse_cdb(struct se_cmd *cmd);
+int     sbc_parse_cdb(struct se_cmd *cmd, struct spc_ops *ops);
 int     spc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
 
 void    transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);