linux-ext4 - [RFCv3 06/10] fs.h: Add TRACE_IOCB_STRINGS for use in trace points

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Date:   Thu, 13 Apr 2023 14:10:28 +0530
From:   "Ritesh Harjani (IBM)" <ritesh.list@...il.com>
To:     linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org
Cc:     Jan Kara <jack@...e.cz>, Christoph Hellwig <hch@...radead.org>,
        "Darrick J . Wong" <djwong@...nel.org>,
        Ojaswin Mujoo <ojaswin@...ux.ibm.com>,
        Disha Goel <disgoel@...ux.ibm.com>,
        "Ritesh Harjani (IBM)" <ritesh.list@...il.com>,
        Christoph Hellwig <hch@....de>
Subject: [RFCv3 06/10] fs.h: Add TRACE_IOCB_STRINGS for use in trace points

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

Tested-by: Disha Goel <disgoel@...ux.ibm.com>
Reviewed-by: Christoph Hellwig <hch@....de>
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@...il.com>
---
 include/linux/fs.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 9ca3813f43e2..6903fc15987a 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 TRACE_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