linux-kernel - [PATCH 2/5] block: extend rq_flag

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Date:	Wed,  8 Oct 2014 17:55:33 +0200
From:	Matias Bjørling <m@...rling.me>
To:	thornber@...hat.com, snitzer@...hat.com, hch@...radead.org,
	hayakawa@...inux.co.jp, axboe@...com, andy@...off.com,
	dm-devel@...hat.com, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, bvanassche@....org,
	linux-nvme@...ts.infradead.org
Cc:	jmad@....dk, Matias Bjørling <m@...rling.me>
Subject: [PATCH 2/5] block: extend rq_flag_bits

From: Jesper Madsen <jmad@....dk>

The rq_flag_bits is extended by REQ_NVM and REQ_NVM_MAPPED

REQ_NVM is used to detect request have through LightNVM on submission, and can
be detected on completion.

REQ_NVM_MAPPED is used to detect if request have mapped appropriately through
LightNVM.

The latter is added temponarily to debug the LightNVM key-value target and will
be removed later.

Signed-off-by: Matias Bjørling <m@...rling.me>
---
 include/linux/blk_types.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 66c2167..b1d2f4d 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -191,6 +191,8 @@ enum rq_flag_bits {
 	__REQ_END,		/* last of chain of requests */
 	__REQ_HASHED,		/* on IO scheduler merge hash */
 	__REQ_MQ_INFLIGHT,	/* track inflight for MQ */
+	__REQ_NVM,		/* request is queued via lightnvm */
+	__REQ_NVM_MAPPED,	/* lightnvm mapped this request */
 	__REQ_NR_BITS,		/* stops here */
 };
 
@@ -245,5 +247,7 @@ enum rq_flag_bits {
 #define REQ_END			(1ULL << __REQ_END)
 #define REQ_HASHED		(1ULL << __REQ_HASHED)
 #define REQ_MQ_INFLIGHT		(1ULL << __REQ_MQ_INFLIGHT)
+#define REQ_NVM			(1ULL << __REQ_NVM)
+#define REQ_NVM_MAPPED		(1ULL << __REQ_NVM_MAPPED)
 
 #endif /* __LINUX_BLK_TYPES_H */
-- 
1.9.1

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