f2fs: add tracepoints for sync & inode operations

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.

Also 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>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
[Jaegeuk: combine and modify the tracepoint structures]
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 07be88ddb9f8..0b0ba26ba76e 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -25,6 +25,7 @@
 #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)
@@ -116,9 +117,12 @@ 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(inode);
         ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
-        if (ret)
+        if (ret) {
+                trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
                 return ret;
+        }
 
         /* guarantee free sections for fsync */
         f2fs_balance_fs(sbi);
@@ -153,6 +157,7 @@ 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, need_cp, datasync, ret);
         return ret;
 }