target: move write_same to struct spc_ops

Add spc_ops->execute_write_same() caller for ->execute_cmd() setup,
and update IBLOCK backends to use it.

(nab: add export of spc_get_write_same_sectors symbol)
(roland: Carry forward: Fix range calculation in WRITE SAME emulation
         when num blocks == 0)

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

1 files changed, 2 insertions, 0 deletions

diff --git a/include/target/target_core_backend.h b/include/target/target_core_backend.h
index 5797b1164c80..fbc6a1b8b99a 100644
--- a/include/target/target_core_backend.h
+++ b/include/target/target_core_backend.h
@@ -42,6 +42,7 @@ struct se_subsystem_api {
 struct spc_ops {
         int (*execute_rw)(struct se_cmd *cmd);
         int (*execute_sync_cache)(struct se_cmd *cmd);
+        int (*execute_write_same)(struct se_cmd *cmd);
 };
 
 int     transport_subsystem_register(struct se_subsystem_api *);
@@ -55,6 +56,7 @@ void	target_complete_cmd(struct se_cmd *, u8);
 
 int     sbc_parse_cdb(struct se_cmd *cmd, struct spc_ops *ops);
 int     spc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
+int     spc_get_write_same_sectors(struct se_cmd *cmd);
 
 void    transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
 int     transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);