linux-kernel - [PATCH 1/4] lightnvm: add sync and close block I/O types

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Message-Id: <1462375892-26533-1-git-send-email-javier@cnexlabs.com>
Date:	Wed,  4 May 2016 17:31:29 +0200
From:	"Javier González" <jg@...htnvm.io>
To:	mb@...htnvm.io
Cc:	linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
	Javier González <javier@...xlabs.com>
Subject: [PATCH 1/4] lightnvm: add sync and close block I/O types

Within a target, I/O requests stem from different paths, which might vary
in terms of the data structures being allocated, context, etc. This
might impact how the request is treated, or how memory is freed once
the bio is completed.

Add two different types of I/Os: (i) NVM_IOTYPE_SYNC, which indicates
that the I/O is synchronous; and  (ii) NVM_IOTYPE_CLOSE_BLK, which
indicates that the I/O closes the block to which all the ppas on the
request belong to.

Signed-off-by: Javier González <javier@...xlabs.com>
---
 include/linux/lightnvm.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 29a6890..6c02209 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -11,6 +11,8 @@ enum {

 	NVM_IOTYPE_NONE = 0,
 	NVM_IOTYPE_GC = 1,
+	NVM_IOTYPE_SYNC = 2,
+	NVM_IOTYPE_CLOSE_BLK = 4,
 };

 #define NVM_BLK_BITS (16)
-- 
2.5.0