f2fs: add a tracepoint on f2fs_new_inode

This can help when debugging the free nid allocation flows.

Reviewed-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

2 files changed, 9 insertions, 1 deletions

diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index c57fd18b769d..4aa26e53c935 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -63,7 +63,7 @@ static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
                 nid_free = true;
                 goto out;
         }
-
+        trace_f2fs_new_inode(inode, 0);
         mark_inode_dirty(inode);
         return inode;
 
@@ -71,6 +71,7 @@ out:
         clear_nlink(inode);
         unlock_new_inode(inode);
 fail:
+        trace_f2fs_new_inode(inode, err);
         iput(inode);
         if (nid_free)
                 alloc_nid_failed(sbi, ino);
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index b2b2f72a023d..52ae54828eda 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -197,6 +197,13 @@ DEFINE_EVENT(f2fs__inode, f2fs_evict_inode,
         TP_ARGS(inode)
 );
 
+DEFINE_EVENT(f2fs__inode_exit, f2fs_new_inode,
+
+        TP_PROTO(struct inode *inode, int ret),
+
+        TP_ARGS(inode, ret)
+);
+
 TRACE_EVENT(f2fs_unlink_enter,
 
         TP_PROTO(struct inode *dir, struct dentry *dentry),