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-rw-r--r--include/scsi/scsi_cmnd.h19
1 files changed, 18 insertions, 1 deletions
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index c6478bb6f963..de28aab820b0 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -2,12 +2,12 @@
2#define _SCSI_SCSI_CMND_H 2#define _SCSI_SCSI_CMND_H
3 3
4#include <linux/dma-mapping.h> 4#include <linux/dma-mapping.h>
5#include <linux/blkdev.h>
5#include <linux/list.h> 6#include <linux/list.h>
6#include <linux/types.h> 7#include <linux/types.h>
7#include <linux/timer.h> 8#include <linux/timer.h>
8#include <linux/scatterlist.h> 9#include <linux/scatterlist.h>
9 10
10struct request;
11struct Scsi_Host; 11struct Scsi_Host;
12struct scsi_device; 12struct scsi_device;
13 13
@@ -158,4 +158,21 @@ static inline int scsi_get_resid(struct scsi_cmnd *cmd)
158#define scsi_for_each_sg(cmd, sg, nseg, __i) \ 158#define scsi_for_each_sg(cmd, sg, nseg, __i) \
159 for_each_sg(scsi_sglist(cmd), sg, nseg, __i) 159 for_each_sg(scsi_sglist(cmd), sg, nseg, __i)
160 160
161static inline int scsi_bidi_cmnd(struct scsi_cmnd *cmd)
162{
163 return blk_bidi_rq(cmd->request) &&
164 (cmd->request->next_rq->special != NULL);
165}
166
167static inline struct scsi_data_buffer *scsi_in(struct scsi_cmnd *cmd)
168{
169 return scsi_bidi_cmnd(cmd) ?
170 cmd->request->next_rq->special : &cmd->sdb;
171}
172
173static inline struct scsi_data_buffer *scsi_out(struct scsi_cmnd *cmd)
174{
175 return &cmd->sdb;
176}
177
161#endif /* _SCSI_SCSI_CMND_H */ 178#endif /* _SCSI_SCSI_CMND_H */