target: clean up the backend interface to caching parameters

Remove the dpo_emulated, fua_write_emulated, fua_read_emulated and
write_cache_emulated methods, and replace them with a simple bitfields in
se_subsystem_api in those cases where they ever returned one.

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

1 files changed, 4 insertions, 16 deletions

diff --git a/include/target/target_core_transport.h b/include/target/target_core_transport.h
index 171c2359bc79..9c7e32870f87 100644
--- a/include/target/target_core_transport.h
+++ b/include/target/target_core_transport.h
@@ -218,6 +218,10 @@ struct se_subsystem_api {
          * Transport Type.
          */
         u8 transport_type;
+
+        unsigned int fua_write_emulated : 1;
+        unsigned int write_cache_emulated : 1;
+
         /*
          * struct module for struct se_hba references
          */
@@ -254,22 +258,6 @@ struct se_subsystem_api {
         void (*free_device)(void *);
 
         /*
-         * dpo_emulated():
-         */
-        int (*dpo_emulated)(struct se_device *);
-        /*
-         * fua_write_emulated():
-         */
-        int (*fua_write_emulated)(struct se_device *);
-        /*
-         * fua_read_emulated():
-         */
-        int (*fua_read_emulated)(struct se_device *);
-        /*
-         * write_cache_emulated():
-         */
-        int (*write_cache_emulated)(struct se_device *);
-        /*
          * transport_complete():
          *
          * Use transport_generic_complete() for majority of DAS transport