Received-SPF: pass (google.com: domain of linux-ext4-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   "Ritesh Harjani (IBM)" <ritesh.list@gmail.com>
To:     linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org
Cc:     Jan Kara <jack@suse.cz>, Christoph Hellwig <hch@infradead.org>,
        "Darrick J . Wong" <djwong@kernel.org>,
        Ojaswin Mujoo <ojaswin@linux.ibm.com>,
        "Ritesh Harjani (IBM)" <ritesh.list@gmail.com>
Subject: [RFCv2 7/8] fs.h: Add IOCB_STRINGS for use in trace points
Date:   Tue, 11 Apr 2023 10:51:55 +0530
Message-Id: <d02f3e41ef7e2af88640cc8d4403f54530942776.1681188927.git.ritesh.list@gmail.com>
In-Reply-To: <cover.1681188927.git.ritesh.list@gmail.com>
References: <cover.1681188927.git.ritesh.list@gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Add IOCB_STRINGS macro which can be used in the trace point patch to
print different flag values with meaningful string output.

Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
---
 include/linux/fs.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 21d2b5670308..496159869af1 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -340,6 +340,20 @@ enum rw_hint {
 /* can use bio alloc cache */
 #define IOCB_ALLOC_CACHE	(1 << 21)
 
+/* for use in trace events */
+#define IOCB_STRINGS \
+	{ IOCB_HIPRI, "HIPRI"	}, \
+	{ IOCB_DSYNC, "DSYNC"	}, \
+	{ IOCB_SYNC, "SYNC"	}, \
+	{ IOCB_NOWAIT, "NOWAIT" }, \
+	{ IOCB_APPEND, "APPEND" }, \
+	{ IOCB_EVENTFD, "EVENTD"}, \
+	{ IOCB_DIRECT, "DIRECT" }, \
+	{ IOCB_WRITE, "WRITE"	}, \
+	{ IOCB_WAITQ, "WAITQ"	}, \
+	{ IOCB_NOIO, "NOIO"	}, \
+	{ IOCB_ALLOC_CACHE, "ALLOC_CACHE" }
+
 struct kiocb {
 	struct file		*ki_filp;
 	loff_t			ki_pos;
-- 
2.39.2