[SCSI] libosd: osd_req_{read,write} takes a length parameter

For supporting of chained-bios we can not inspect the first
bio only, as before. Caller shall pass the total length of the
request, ie. sum_bytes(bio-chain).

Also since the bio might be a chain we don't set it's direction
on behalf of it's callers. The bio direction should be properly
set prior to this call. So fix a couple of write users that now
need to set the bio direction properly

[In this patch I change both library code and user sites at
 exofs, to make it easy on integration. It should be submitted
 via James's scsi-misc tree.]

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
CC: Jeff Garzik <jeff@garzik.org>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/include/scsi/osd_initiator.h b/include/scsi/osd_initiator.h
index 6132790d678f..8c1e3b804afd 100644
--- a/include/scsi/osd_initiator.h
+++ b/include/scsi/osd_initiator.h
@@ -363,7 +363,7 @@ void osd_req_create_object(struct osd_request *or, struct osd_obj_id *);
 void osd_req_remove_object(struct osd_request *or, struct osd_obj_id *);
 
 void osd_req_write(struct osd_request *or,
-        const struct osd_obj_id *, struct bio *data_out, u64 offset);
+        const struct osd_obj_id *obj, u64 offset, struct bio *bio, u64 len);
 int osd_req_write_kern(struct osd_request *or,
         const struct osd_obj_id *obj, u64 offset, void *buff, u64 len);
 void osd_req_append(struct osd_request *or,
@@ -380,7 +380,7 @@ void osd_req_flush_object(struct osd_request *or,
         /*V2*/ u64 offset, /*V2*/ u64 len);
 
 void osd_req_read(struct osd_request *or,
-        const struct osd_obj_id *, struct bio *data_in, u64 offset);
+        const struct osd_obj_id *obj, u64 offset, struct bio *bio, u64 len);
 int osd_req_read_kern(struct osd_request *or,
         const struct osd_obj_id *obj, u64 offset, void *buff, u64 len);