[SCSI] block: separate failfast into multiple bits.

[safe/jmp/linux-2.6] / include / linux / blkdev.h

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index bfc18e4..f3491d2 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -87,7 +87,9 @@ enum {
  */
 enum rq_flag_bits {
        __REQ_RW,               /* not set, read. set, write */
-       __REQ_FAILFAST,         /* no low level driver retries */
+       __REQ_FAILFAST_DEV,     /* no driver retries of device errors */
+       __REQ_FAILFAST_TRANSPORT, /* no driver retries of transport errors */
+       __REQ_FAILFAST_DRIVER,  /* no driver retries of driver errors */
        __REQ_DISCARD,          /* request to discard sectors */
        __REQ_SORTED,           /* elevator knows about this request */
        __REQ_SOFTBARRIER,      /* may not be passed by ioscheduler */
@@ -111,8 +113,10 @@ enum rq_flag_bits {
 };
 
 #define REQ_RW         (1 << __REQ_RW)
+#define REQ_FAILFAST_DEV       (1 << __REQ_FAILFAST_DEV)
+#define REQ_FAILFAST_TRANSPORT (1 << __REQ_FAILFAST_TRANSPORT)
+#define REQ_FAILFAST_DRIVER    (1 << __REQ_FAILFAST_DRIVER)
 #define REQ_DISCARD    (1 << __REQ_DISCARD)
-#define REQ_FAILFAST   (1 << __REQ_FAILFAST)
 #define REQ_SORTED     (1 << __REQ_SORTED)
 #define REQ_SOFTBARRIER        (1 << __REQ_SOFTBARRIER)
 #define REQ_HARDBARRIER        (1 << __REQ_HARDBARRIER)
@@ -560,7 +564,12 @@ enum {
 #define blk_special_request(rq)        ((rq)->cmd_type == REQ_TYPE_SPECIAL)
 #define blk_sense_request(rq)  ((rq)->cmd_type == REQ_TYPE_SENSE)
 
-#define blk_noretry_request(rq)        ((rq)->cmd_flags & REQ_FAILFAST)
+#define blk_failfast_dev(rq)   ((rq)->cmd_flags & REQ_FAILFAST_DEV)
+#define blk_failfast_transport(rq) ((rq)->cmd_flags & REQ_FAILFAST_TRANSPORT)
+#define blk_failfast_driver(rq)        ((rq)->cmd_flags & REQ_FAILFAST_DRIVER)
+#define blk_noretry_request(rq)        (blk_failfast_dev(rq) ||        \
+                                blk_failfast_transport(rq) ||  \
+                                blk_failfast_driver(rq))
 #define blk_rq_started(rq)     ((rq)->cmd_flags & REQ_STARTED)
 
 #define blk_account_rq(rq)     (blk_rq_started(rq) && (blk_fs_request(rq) || blk_discard_rq(rq))) 
@@ -1012,10 +1021,21 @@ struct blk_integrity {
 
 extern int blk_integrity_register(struct gendisk *, struct blk_integrity *);
 extern void blk_integrity_unregister(struct gendisk *);
-extern int blk_integrity_compare(struct block_device *, struct block_device *);
+extern int blk_integrity_compare(struct gendisk *, struct gendisk *);
 extern int blk_rq_map_integrity_sg(struct request *, struct scatterlist *);
 extern int blk_rq_count_integrity_sg(struct request *);
 
+static inline
+struct blk_integrity *bdev_get_integrity(struct block_device *bdev)
+{
+       return bdev->bd_disk->integrity;
+}
+
+static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk)
+{
+       return disk->integrity;
+}
+
 static inline int blk_integrity_rq(struct request *rq)
 {
        if (rq->bio == NULL)
@@ -1029,6 +1049,8 @@ static inline int blk_integrity_rq(struct request *rq)
 #define blk_integrity_rq(rq)                   (0)
 #define blk_rq_count_integrity_sg(a)           (0)
 #define blk_rq_map_integrity_sg(a, b)          (0)
+#define bdev_get_integrity(a)                  (0)
+#define blk_get_integrity(a)                   (0)
 #define blk_integrity_compare(a, b)            (0)
 #define blk_integrity_register(a, b)           (0)
 #define blk_integrity_unregister(a)            do { } while (0);