[SCSI] sd: Support for SCSI disk (SBC) Data Integrity Field

[safe/jmp/linux-2.6] / drivers / scsi / sd.h

diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h
index 86b18d4..550b2f7 100644 (file)
--- a/drivers/scsi/sd.h
+++ b/drivers/scsi/sd.h
@@ -82,4 +82,29 @@ enum sd_dif_target_protection_types {
        SD_DIF_TYPE3_PROTECTION = 0x3,
 };
 
+/*
+ * Data Integrity Field tuple.
+ */
+struct sd_dif_tuple {
+       __be16 guard_tag;       /* Checksum */
+       __be16 app_tag;         /* Opaque storage */
+       __be32 ref_tag;         /* Target LBA or indirect LBA */
+};
+
+#if defined(CONFIG_BLK_DEV_INTEGRITY)
+
+extern void sd_dif_op(struct scsi_cmnd *, unsigned int, unsigned int);
+extern void sd_dif_config_host(struct scsi_disk *);
+extern int sd_dif_prepare(struct request *rq, sector_t, unsigned int);
+extern void sd_dif_complete(struct scsi_cmnd *, unsigned int);
+
+#else /* CONFIG_BLK_DEV_INTEGRITY */
+
+#define sd_dif_op(a, b, c)                     do { } while (0)
+#define sd_dif_config_host(a)                  do { } while (0)
+#define sd_dif_prepare(a, b, c)                        (0)
+#define sd_dif_complete(a, b)                  (0)
+
+#endif /* CONFIG_BLK_DEV_INTEGRITY */
+
 #endif /* _SCSI_DISK_H */