readahead: add blk_run_backing_dev

[sfrench/cifs-2.6.git] / include / scsi / scsi_transport_fc.h

diff --git a/include/scsi/scsi_transport_fc.h b/include/scsi/scsi_transport_fc.h
index 68a8d873bbd9caf756bb2be7b429e0ba263c5b54..8e86a94faf06c08ba7e1cd5d12d7418ec5f5d6b0 100644 (file)
--- a/include/scsi/scsi_transport_fc.h
+++ b/include/scsi/scsi_transport_fc.h
@@ -33,7 +33,6 @@
 
 struct scsi_transport_template;
 
-
 /*
  * FC Port definitions - Following FC HBAAPI guidelines
  *
@@ -352,6 +351,7 @@ struct fc_rport {   /* aka fc_starget_attrs */
        struct delayed_work fail_io_work;
        struct work_struct stgt_delete_work;
        struct work_struct rport_delete_work;
+       struct request_queue *rqst_q;   /* bsg support */
 } __attribute__((aligned(sizeof(unsigned long))));
 
 /* bit field values for struct fc_rport "flags" field: */
@@ -514,6 +514,9 @@ struct fc_host_attrs {
        struct workqueue_struct *work_q;
        char devloss_work_q_name[20];
        struct workqueue_struct *devloss_work_q;
+
+       /* bsg support */
+       struct request_queue *rqst_q;
 };
 
 #define shost_to_fc_host(x) \
@@ -579,6 +582,47 @@ struct fc_host_attrs {
        (((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q)
 
 
+struct fc_bsg_buffer {
+       unsigned int payload_len;
+       int sg_cnt;
+       struct scatterlist *sg_list;
+};
+
+/* Values for fc_bsg_job->state_flags (bitflags) */
+#define FC_RQST_STATE_INPROGRESS       0
+#define FC_RQST_STATE_DONE             1
+
+struct fc_bsg_job {
+       struct Scsi_Host *shost;
+       struct fc_rport *rport;
+       struct device *dev;
+       struct request *req;
+       spinlock_t job_lock;
+       unsigned int state_flags;
+       unsigned int ref_cnt;
+       void (*job_done)(struct fc_bsg_job *);
+
+       struct fc_bsg_request *request;
+       struct fc_bsg_reply *reply;
+       unsigned int request_len;
+       unsigned int reply_len;
+       /*
+        * On entry : reply_len indicates the buffer size allocated for
+        * the reply.
+        *
+        * Upon completion : the message handler must set reply_len
+        *  to indicates the size of the reply to be returned to the
+        *  caller.
+        */
+
+       /* DMA payloads for the request/response */
+       struct fc_bsg_buffer request_payload;
+       struct fc_bsg_buffer reply_payload;
+
+       void *dd_data;                  /* Used for driver-specific storage */
+};
+
+
 /* The functions by which the transport class and the driver communicate */
 struct fc_function_template {
        void    (*get_rport_dev_loss_tmo)(struct fc_rport *);
@@ -614,9 +658,14 @@ struct fc_function_template {
        int     (* tsk_mgmt_response)(struct Scsi_Host *, u64, u64, int);
        int     (* it_nexus_response)(struct Scsi_Host *, u64, int);
 
+       /* bsg support */
+       int     (*bsg_request)(struct fc_bsg_job *);
+       int     (*bsg_timeout)(struct fc_bsg_job *);
+
        /* allocation lengths for host-specific data */
        u32                             dd_fcrport_size;
        u32                             dd_fcvport_size;
+       u32                             dd_bsg_size;
 
        /*
         * The driver sets these to tell the transport class it
@@ -737,7 +786,6 @@ fc_vport_set_state(struct fc_vport *vport, enum fc_vport_state new_state)
        vport->vport_state = new_state;
 }
 
-
 struct scsi_transport_template *fc_attach_transport(
                        struct fc_function_template *);
 void fc_release_transport(struct scsi_transport_template *);
@@ -759,5 +807,6 @@ void fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
 struct fc_vport *fc_vport_create(struct Scsi_Host *shost, int channel,
                struct fc_vport_identifiers *);
 int fc_vport_terminate(struct fc_vport *vport);
+void fc_block_scsi_eh(struct scsi_cmnd *cmnd);
 
 #endif /* SCSI_TRANSPORT_FC_H */