linux-kernel - [PATCH 1/4] scsi: Add scsi_prot_op

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Message-ID: <1542725944-244183-2-git-send-email-john.garry@huawei.com>
Date:   Tue, 20 Nov 2018 22:59:01 +0800
From:   John Garry <john.garry@...wei.com>
To:     <jejb@...ux.vnet.ibm.com>, <martin.petersen@...cle.com>
CC:     <linuxarm@...wei.com>, <linux-kernel@...r.kernel.org>,
        <linux-scsi@...r.kernel.org>, John Garry <john.garry@...wei.com>
Subject: [PATCH 1/4] scsi: Add scsi_prot_op_normal()

It is a common pattern to check if a Scsi command protection option is
"normal", i.e. regular IO.

Add a common simple wrapper for this.

Signed-off-by: John Garry <john.garry@...wei.com>
---
 include/scsi/scsi_cmnd.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index c891ada..3b26ea1 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -271,6 +271,11 @@ static inline unsigned char scsi_get_prot_op(struct scsi_cmnd *scmd)
 	return scmd->prot_op;
 }
 
+static inline bool scsi_prot_op_normal(struct scsi_cmnd *scmd)
+{
+	return scmd->prot_op == SCSI_PROT_NORMAL;
+}
+
 enum scsi_prot_flags {
 	SCSI_PROT_TRANSFER_PI		= 1 << 0,
 	SCSI_PROT_GUARD_CHECK		= 1 << 1,
-- 
1.9.1