Wengang Wang
2009-Sep-17 11:56 UTC
[Ocfs2-devel] [PATCH 2/2] ocfs2: add trace event for ocfs2_file_aio_read
add trace event for ocfs2_file_aio_read().
Signed-off-by: Wengang Wang <wen.gang.wang at oracle.com>
---
fs/ocfs2/file.c | 8 ++++----
include/trace/events/ocfs2.h | 25 +++++++++++++++++++++++++
2 files changed, 29 insertions(+), 4 deletions(-)
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 221c5e9..a1587ee 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -62,6 +62,9 @@
#include "buffer_head_io.h"
+#define CREATE_TRACE_POINTS
+#include <trace/events/ocfs2.h>
+
static int ocfs2_sync_inode(struct inode *inode)
{
filemap_fdatawrite(inode->i_mapping);
@@ -2050,10 +2053,7 @@ static ssize_t ocfs2_file_aio_read(struct kiocb *iocb,
struct file *filp = iocb->ki_filp;
struct inode *inode = filp->f_path.dentry->d_inode;
- mlog_entry("(0x%p, %u, '%.*s')\n", filp,
- (unsigned int)nr_segs,
- filp->f_path.dentry->d_name.len,
- filp->f_path.dentry->d_name.name);
+ trace_ocfs2_file_aio_read(iocb, iov, nr_segs, pos);
if (!inode) {
ret = -EINVAL;
diff --git a/include/trace/events/ocfs2.h b/include/trace/events/ocfs2.h
index fa86758..5310901 100644
--- a/include/trace/events/ocfs2.h
+++ b/include/trace/events/ocfs2.h
@@ -5,10 +5,35 @@
#define TRACE_SYSTEM ocfs2
/* add ocfs2 relevant header files below */
+#include "../../../fs/ocfs2/ocfs2.h"
/* add ocfs2 relevant header files above */
#include <linux/tracepoint.h>
/* add tracing declarations below */
+TRACE_EVENT(ocfs2_file_aio_read,
+
+ TP_PROTO(struct kiocb *iocb, const struct iovec *iov,
+ unsigned long nr_segs, loff_t pos),
+
+ TP_ARGS(iocb, iov, nr_segs, pos),
+
+ TP_STRUCT__entry(
+ __field( void *, iocb )
+ __field( void *, iov )
+ __field( unsigned long, nr_segs )
+ __field( loff_t, pos )
+ ),
+
+ TP_fast_assign(
+ __entry->iocb = (void*)iocb;
+ __entry->iov = (void*)iov;
+ __entry->nr_segs = nr_segs;
+ __entry->pos = pos;
+ ),
+
+ TP_printk("0x%p 0x%p %lu %llu\n",
+ __entry->iocb, __entry->iov, __entry->nr_segs, __entry->pos)
+);
/* add tracing declarations above */
#endif /* _TRACE_OCFS2_H */
--
1.6.2.5