From: Christoph Hellwig <hch@xxxxxx>
commit 57292b58ddb58689e8c3b4c6eadbef10d9ca44dd upstream.
This can be used to check for fs vs non-fs requests and basically
removes all knowledge of BLOCK_PC specific from the block layer,
as well as preparing for removing the cmd_type field in struct request.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxx>
[only take the blkdev.h changes as we only want the function for backported
patches - gregkh]
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
include/linux/blkdev.h | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -199,6 +199,11 @@ struct request {
struct request *next_rq;
};
+static inline bool blk_rq_is_passthrough(struct request *rq)
+{
+ return rq->cmd_type != REQ_TYPE_FS;
+}
+
static inline unsigned short req_get_ioprio(struct request *req)
{
return req->ioprio;
@@ -582,9 +587,10 @@ static inline void queue_flag_clear(unsi
((rq)->cmd_flags & (REQ_FAILFAST_DEV|REQ_FAILFAST_TRANSPORT| \
REQ_FAILFAST_DRIVER))
-#define blk_account_rq(rq) \
- (((rq)->cmd_flags & REQ_STARTED) && \
- ((rq)->cmd_type == REQ_TYPE_FS))
+static inline bool blk_account_rq(struct request *rq)
+{
+ return (rq->cmd_flags & REQ_STARTED) && !blk_rq_is_passthrough(rq);
+}
#define blk_rq_cpu_valid(rq) ((rq)->cpu != -1)
#define blk_bidi_rq(rq) ((rq)->next_rq != NULL)
@@ -645,7 +651,7 @@ static inline void blk_clear_rl_full(str
static inline bool rq_mergeable(struct request *rq)
{
- if (rq->cmd_type != REQ_TYPE_FS)
+ if (blk_rq_is_passthrough(rq))
return false;
if (rq->cmd_flags & REQ_NOMERGE_FLAGS)
@@ -890,7 +896,7 @@ static inline unsigned int blk_rq_get_ma
{
struct request_queue *q = rq->q;
- if (unlikely(rq->cmd_type != REQ_TYPE_FS))
+ if (blk_rq_is_passthrough(rq))
return q->limits.max_hw_sectors;
if (!q->limits.chunk_sectors || (rq->cmd_flags & REQ_DISCARD))
