- add varlen_cdb and varlen_cdb_len to hold a large user cdb
if needed. They start as empty. Allocation of buffer must
be done by user and held until request execution is done.
Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
---
block/ll_rw_blk.c | 2 ++
include/linux/blkdev.h | 7 ++++++-
2 files changed, 8 insertions(+), 1 deletions(-)
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index b01dee3..df478f2 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -261,6 +261,8 @@ static void rq_init(struct request_queue *q, struct request *rq)
rq->end_io_data = NULL;
rq->completion_data = NULL;
rq->next_rq = NULL;
+ rq->varlen_cdb_len = 0;
+ rq->varlen_cdb = NULL;
}
/**
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index bbf906a..990643d 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -287,8 +287,13 @@ struct request {
/*
* when request is used as a packet command carrier
*/
- unsigned int cmd_len;
+ unsigned short cmd_len;
+ unsigned short varlen_cdb_len; /* length of varlen_cdb buffer */
unsigned char cmd[BLK_MAX_CDB];
+ unsigned char *varlen_cdb; /* an optional variable-length cdb.
+ * points to a user buffer that must be
+ * valid until end of request
+ */
unsigned int data_len;
unsigned int sense_len;
--
1.5.3.1
-
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