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Subject[PATCH 1/8] f2fs: add tracepoints for sync operations
Date
From: Namjae Jeon <namjae.jeon@samsung.com>

Add tracepoints in f2fs for tracing the syncing
operations like filesystem sync, file sync enter/exit.
It will helf to trace the code under debugging scenarios.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Pankaj Kumar <pankaj.km@samsung.com>
---
fs/f2fs/file.c | 3 ++
fs/f2fs/super.c | 4 +++
include/trace/events/f2fs.h | 84 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 91 insertions(+)
create mode 100644 include/trace/events/f2fs.h

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index b7a053d..318708b 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -24,6 +24,7 @@
#include "segment.h"
#include "xattr.h"
#include "acl.h"
+#include <trace/events/f2fs.h>

static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma,
struct vm_fault *vmf)
@@ -135,6 +136,7 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
if (inode->i_sb->s_flags & MS_RDONLY)
return 0;

+ trace_f2fs_sync_file_enter(file, datasync);
ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
if (ret)
return ret;
@@ -181,6 +183,7 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
}
out:
mutex_unlock(&inode->i_mutex);
+ trace_f2fs_sync_file_exit(inode, ret);
return ret;
}

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 8c11764..2098ddb 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -27,6 +27,9 @@
#include "node.h"
#include "xattr.h"

+#define CREATE_TRACE_POINTS
+#include <trace/events/f2fs.h>
+
static struct kmem_cache *f2fs_inode_cachep;

enum {
@@ -132,6 +135,7 @@ int f2fs_sync_fs(struct super_block *sb, int sync)
{
struct f2fs_sb_info *sbi = F2FS_SB(sb);

+ trace_f2fs_sync_fs(sb, sync);
if (!sbi->s_dirty && !get_pages(sbi, F2FS_DIRTY_NODES))
return 0;

diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
new file mode 100644
index 0000000..ab28831
--- /dev/null
+++ b/include/trace/events/f2fs.h
@@ -0,0 +1,84 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM f2fs
+
+#if !defined(_TRACE_F2FS_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_F2FS_H
+
+#include <linux/tracepoint.h>
+
+
+TRACE_EVENT(f2fs_sync_file_enter,
+ TP_PROTO(struct file *file, int datasync),
+
+ TP_ARGS(file, datasync),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(ino_t, ino)
+ __field(ino_t, parent)
+ __field(int, datasync)
+ ),
+
+ TP_fast_assign(
+ struct dentry *dentry = file->f_path.dentry;
+
+ __entry->dev = dentry->d_inode->i_sb->s_dev;
+ __entry->ino = dentry->d_inode->i_ino;
+ __entry->datasync = datasync;
+ __entry->parent = dentry->d_parent->d_inode->i_ino;
+ ),
+
+ TP_printk("dev %d,%d ino %lu parent %lu datasync %d ",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ (unsigned long) __entry->ino,
+ (unsigned long) __entry->parent, __entry->datasync)
+);
+
+TRACE_EVENT(f2fs_sync_file_exit,
+ TP_PROTO(struct inode *inode, int ret),
+
+ TP_ARGS(inode, ret),
+
+ TP_STRUCT__entry(
+ __field(int, ret)
+ __field(ino_t, ino)
+ __field(dev_t, dev)
+ ),
+
+ TP_fast_assign(
+ __entry->ret = ret;
+ __entry->ino = inode->i_ino;
+ __entry->dev = inode->i_sb->s_dev;
+ ),
+
+ TP_printk("dev %d,%d ino %lu ret %d",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ (unsigned long) __entry->ino,
+ __entry->ret)
+);
+
+TRACE_EVENT(f2fs_sync_fs,
+ TP_PROTO(struct super_block *sb, int wait),
+
+ TP_ARGS(sb, wait),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(int, wait)
+
+ ),
+
+ TP_fast_assign(
+ __entry->dev = sb->s_dev;
+ __entry->wait = wait;
+ ),
+
+ TP_printk("dev %d,%d wait %d",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ __entry->wait)
+);
+
+#endif /* _TRACE_F2FS_H */
+
+ /* This part must be outside protection */
+#include <trace/define_trace.h>
--
1.7.9.5


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