[SCSI] zfcp: Use SCSI device data zfcp_scsi_dev instead of zfcp_unit

This is the large change to switch from using the data in
zfcp_unit to zfcp_scsi_dev. Keeping everything working requires doing
the switch in one piece. To ensure that no code keeps using the data
in zfcp_unit, this patch also removes the data from zfcp_unit that is
now being replaced with zfcp_scsi_dev.

For zfcp, the scsi_device together with zfcp_scsi_dev exist from the
call of slave_alloc to the call of slave_destroy. The data in
zfcp_scsi_dev is initialized in zfcp_scsi_slave_alloc and the LUN is
opened; the final shutdown for the LUN is run from slave_destroy.

Where the scsi_device or zfcp_scsi_dev is needed, the pointer to the
scsi_device is passed as function argument and inside the function
converted to the pointer to zfcp_scsi_dev; this avoids back and forth
conversion betweeen scsi_device and zfcp_scsi_dev.

While changing the function arguments from zfcp_unit to scsi_device,
the functions names are renamed form "unit" to "lun". This is to have
a seperation between zfcp_scsi_dev/LUN and the zfcp_unit; only code
referring to the remaining configuration information in zfcp_unit
struct uses "unit".

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 15 insertions, 17 deletions

diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h
index 3c90604076e0..80714679f5d6 100644
--- a/drivers/s390/scsi/zfcp_ext.h
+++ b/drivers/s390/scsi/zfcp_ext.h
@@ -42,10 +42,10 @@ extern void zfcp_dbf_rec_thread(char *, struct zfcp_dbf *);
 extern void zfcp_dbf_rec_thread_lock(char *, struct zfcp_dbf *);
 extern void zfcp_dbf_rec_adapter(char *, void *, struct zfcp_dbf *);
 extern void zfcp_dbf_rec_port(char *, void *, struct zfcp_port *);
-extern void zfcp_dbf_rec_unit(char *, void *, struct zfcp_unit *);
+extern void zfcp_dbf_rec_lun(char *, void *, struct scsi_device *);
 extern void zfcp_dbf_rec_trigger(char *, void *, u8, u8, void *,
                                  struct zfcp_adapter *, struct zfcp_port *,
-                                 struct zfcp_unit *);
+                                 struct scsi_device *);
 extern void zfcp_dbf_rec_action(char *, struct zfcp_erp_action *);
 extern void _zfcp_dbf_hba_fsf_response(const char *, int, struct zfcp_fsf_req *,
                                        struct zfcp_dbf *);
@@ -76,20 +76,20 @@ extern void zfcp_erp_port_shutdown(struct zfcp_port *, int, char *, void *);
 extern void zfcp_erp_port_forced_reopen(struct zfcp_port *, int, char *,
                                         void *);
 extern void zfcp_erp_port_failed(struct zfcp_port *, char *, void *);
-extern void zfcp_erp_modify_unit_status(struct zfcp_unit *, char *, void *, u32,
-                                        int);
-extern void zfcp_erp_unit_reopen(struct zfcp_unit *, int, char *, void *);
-extern void zfcp_erp_unit_shutdown(struct zfcp_unit *, int, char *, void *);
-extern void zfcp_erp_unit_shutdown_wait(struct zfcp_unit *, char *);
-extern void zfcp_erp_unit_failed(struct zfcp_unit *, char *, void *);
+extern void zfcp_erp_modify_lun_status(struct scsi_device *, char *, void *,
+                                       u32, int);
+extern void zfcp_erp_lun_reopen(struct scsi_device *, int, char *, void *);
+extern void zfcp_erp_lun_shutdown(struct scsi_device *, int, char *, void *);
+extern void zfcp_erp_lun_shutdown_wait(struct scsi_device *, char *);
+extern void zfcp_erp_lun_failed(struct scsi_device *, char *, void *);
 extern int  zfcp_erp_thread_setup(struct zfcp_adapter *);
 extern void zfcp_erp_thread_kill(struct zfcp_adapter *);
 extern void zfcp_erp_wait(struct zfcp_adapter *);
 extern void zfcp_erp_notify(struct zfcp_erp_action *, unsigned long);
 extern void zfcp_erp_port_boxed(struct zfcp_port *, char *, void *);
-extern void zfcp_erp_unit_boxed(struct zfcp_unit *, char *, void *);
+extern void zfcp_erp_lun_boxed(struct scsi_device *, char *, void *);
 extern void zfcp_erp_port_access_denied(struct zfcp_port *, char *, void *);
-extern void zfcp_erp_unit_access_denied(struct zfcp_unit *, char *, void *);
+extern void zfcp_erp_lun_access_denied(struct scsi_device *, char *, void *);
 extern void zfcp_erp_adapter_access_changed(struct zfcp_adapter *, char *,
                                             void *);
 extern void zfcp_erp_timeout_handler(unsigned long);
@@ -117,8 +117,8 @@ extern int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *);
 extern int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *);
 extern int zfcp_fsf_close_port(struct zfcp_erp_action *);
 extern int zfcp_fsf_close_physical_port(struct zfcp_erp_action *);
-extern int zfcp_fsf_open_unit(struct zfcp_erp_action *);
-extern int zfcp_fsf_close_unit(struct zfcp_erp_action *);
+extern int zfcp_fsf_open_lun(struct zfcp_erp_action *);
+extern int zfcp_fsf_close_lun(struct zfcp_erp_action *);
 extern int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *);
 extern int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *,
                                               struct fsf_qtcb_bottom_config *);
@@ -134,12 +134,10 @@ extern int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *, struct zfcp_fsf_ct_els *,
                             mempool_t *, unsigned int);
 extern int zfcp_fsf_send_els(struct zfcp_adapter *, u32,
                              struct zfcp_fsf_ct_els *, unsigned int);
-extern int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *,
-                                          struct scsi_cmnd *);
+extern int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *);
 extern void zfcp_fsf_req_free(struct zfcp_fsf_req *);
-extern struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *, u8);
-extern struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long,
-                                                       struct zfcp_unit *);
+extern struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *, u8);
+extern struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *);
 extern void zfcp_fsf_reqid_check(struct zfcp_qdio *, int);
 
 /* zfcp_qdio.c */