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Subject[PATCH 2/8] f2fs: add tracepoints for inode operations
Date
From: Namjae Jeon <namjae.jeon@samsung.com>

Add tracepoints for tracing the various inode operations
like building inode, eviction of inode, link/unlike of
inodes.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Pankaj Kumar <pankaj.km@samsung.com>
---
fs/f2fs/inode.c | 3 ++
fs/f2fs/namei.c | 3 ++
include/trace/events/f2fs.h | 90 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 96 insertions(+)

diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index ddae412..9216d1a 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -15,6 +15,7 @@

#include "f2fs.h"
#include "node.h"
+#include <trace/events/f2fs.h>

void f2fs_set_inode_flags(struct inode *inode)
{
@@ -90,6 +91,7 @@ struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
struct inode *inode;
int ret;

+ trace_f2fs_iget(sb, ino);
inode = iget_locked(sb, ino);
if (!inode)
return ERR_PTR(-ENOMEM);
@@ -233,6 +235,7 @@ void f2fs_evict_inode(struct inode *inode)
{
struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);

+ trace_f2fs_evict_inode(inode);
truncate_inode_pages(&inode->i_data, 0);

if (inode->i_ino == F2FS_NODE_INO(sbi) ||
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 1a49b88..b6e5b94 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -17,6 +17,7 @@
#include "f2fs.h"
#include "xattr.h"
#include "acl.h"
+#include <trace/events/f2fs.h>

static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
{
@@ -223,6 +224,7 @@ static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
struct page *page;
int err = -ENOENT;

+ trace_f2fs_unlink_enter(dir, dentry);
f2fs_balance_fs(sbi);

de = f2fs_find_entry(dir, &dentry->d_name, &page);
@@ -241,6 +243,7 @@ static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
/* In order to evict this inode, we set it dirty */
mark_inode_dirty(inode);
fail:
+ trace_f2fs_unlink_exit(dentry, err);
return err;
}

diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index ab28831..0c76885 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -78,6 +78,96 @@ TRACE_EVENT(f2fs_sync_fs,
__entry->wait)
);

+TRACE_EVENT(f2fs_iget,
+ TP_PROTO(struct super_block *sb, unsigned long ino),
+
+ TP_ARGS(sb, ino),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(unsigned long, ino)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = sb->s_dev;
+ __entry->ino = ino;
+ ),
+
+ TP_printk("dev %d,%d ino %lu ",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ (unsigned long) __entry->ino)
+);
+
+TRACE_EVENT(f2fs_evict_inode,
+ TP_PROTO(struct inode *inode),
+
+ TP_ARGS(inode),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(ino_t, ino)
+ __field(int, nlink)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->nlink = inode->i_nlink;
+ ),
+
+ TP_printk("dev %d,%d ino %lu nlink %d",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ (unsigned long) __entry->ino, __entry->nlink)
+);
+
+TRACE_EVENT(f2fs_unlink_enter,
+ TP_PROTO(struct inode *parent, struct dentry *dentry),
+
+ TP_ARGS(parent, dentry),
+
+ TP_STRUCT__entry(
+ __field(ino_t, parent)
+ __field(ino_t, ino)
+ __field(loff_t, size)
+ __field(dev_t, dev)
+ ),
+
+ TP_fast_assign(
+ __entry->parent = parent->i_ino;
+ __entry->ino = dentry->d_inode->i_ino;
+ __entry->size = dentry->d_inode->i_size;
+ __entry->dev = dentry->d_inode->i_sb->s_dev;
+ ),
+
+ TP_printk("dev %d,%d ino %lu size %lld parent %lu",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ (unsigned long) __entry->ino, __entry->size,
+ (unsigned long) __entry->parent)
+);
+
+TRACE_EVENT(f2fs_unlink_exit,
+ TP_PROTO(struct dentry *dentry, int ret),
+
+ TP_ARGS(dentry, ret),
+
+ TP_STRUCT__entry(
+ __field(ino_t, ino)
+ __field(dev_t, dev)
+ __field(int, ret)
+ ),
+
+ TP_fast_assign(
+ __entry->ino = dentry->d_inode->i_ino;
+ __entry->dev = dentry->d_inode->i_sb->s_dev;
+ __entry->ret = ret;
+ ),
+
+ TP_printk("dev %d,%d ino %lu ret %d",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ (unsigned long) __entry->ino,
+ __entry->ret)
+);
+
#endif /* _TRACE_F2FS_H */

/* This part must be outside protection */
--
1.7.9.5


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