V4L/DVB (7121): Renames videobuf lock to vb_lock

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

diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index c6478bb6f963b9d5f626b4d735728d91021cb9b6..de28aab820b0cca9cdd7261c4000ee965f821e1d 100644 (file)
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -2,12 +2,12 @@
 #define _SCSI_SCSI_CMND_H
 
 #include <linux/dma-mapping.h>
+#include <linux/blkdev.h>
 #include <linux/list.h>
 #include <linux/types.h>
 #include <linux/timer.h>
 #include <linux/scatterlist.h>
 
-struct request;
 struct Scsi_Host;
 struct scsi_device;
 
@@ -158,4 +158,21 @@ static inline int scsi_get_resid(struct scsi_cmnd *cmd)
 #define scsi_for_each_sg(cmd, sg, nseg, __i)                   \
        for_each_sg(scsi_sglist(cmd), sg, nseg, __i)
 
+static inline int scsi_bidi_cmnd(struct scsi_cmnd *cmd)
+{
+       return blk_bidi_rq(cmd->request) &&
+               (cmd->request->next_rq->special != NULL);
+}
+
+static inline struct scsi_data_buffer *scsi_in(struct scsi_cmnd *cmd)
+{
+       return scsi_bidi_cmnd(cmd) ?
+               cmd->request->next_rq->special : &cmd->sdb;
+}
+
+static inline struct scsi_data_buffer *scsi_out(struct scsi_cmnd *cmd)
+{
+       return &cmd->sdb;
+}
+
 #endif /* _SCSI_SCSI_CMND_H */