ANDROID: f2fs: add android fsync tracepoint

Change-Id: Id7c23173f85a835a2294ee698597b7d60f1ee356
Signed-off-by: Jaegeuk Kim <[email protected]>

fs/f2fs/file.c

@@ -29,6 +29,7 @@
 #include "gc.h"
 #include "trace.h"
 #include <trace/events/f2fs.h>
+#include <trace/events/android_fs.h>
 
 static int f2fs_filemap_fault(struct vm_area_struct *vma,
 					struct vm_fault *vmf)
@@ -220,6 +221,15 @@ static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end,
 
 	trace_f2fs_sync_file_enter(inode);
 
+	if (trace_android_fs_fsync_start_enabled()) {
+		char *path, pathbuf[MAX_TRACE_PATHBUF_LEN];
+
+		path = android_fstrace_get_pathname(pathbuf,
+				MAX_TRACE_PATHBUF_LEN, inode);
+		trace_android_fs_fsync_start(inode,
+				current->pid, path, current->comm);
+	}
+
 	if (S_ISDIR(inode->i_mode))
 		goto go_write;
 
@@ -325,6 +335,8 @@ static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end,
 out:
 	trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret);
 	f2fs_trace_ios(NULL, 1);
+	trace_android_fs_fsync_end(inode, start, end - start);
+
 	return ret;
 }
 

include/trace/events/android_fs.h

@@ -25,6 +25,15 @@ DEFINE_EVENT(android_fs_data_end_template, android_fs_datawrite_end,
 	TP_PROTO(struct inode *inode, loff_t offset, int bytes),
 	     TP_ARGS(inode, offset, bytes));
 
+DEFINE_EVENT(android_fs_fsync_start_template, android_fs_fsync_start,
+	TP_PROTO(struct inode *inode,
+		 pid_t pid, char *pathname, char *command),
+	TP_ARGS(inode, pid, pathname, command));
+
+DEFINE_EVENT(android_fs_data_end_template, android_fs_fsync_end,
+	TP_PROTO(struct inode *inode, loff_t offset, int bytes),
+	     TP_ARGS(inode, offset, bytes));
+
 #endif /* _TRACE_ANDROID_FS_H */
 
 /* This part must be outside protection */

include/trace/events/android_fs_template.h

@@ -61,4 +61,38 @@ DECLARE_EVENT_CLASS(android_fs_data_end_template,
 		  __entry->offset, __entry->bytes)
 );
 
+DECLARE_EVENT_CLASS(android_fs_fsync_start_template,
+	TP_PROTO(struct inode *inode,
+		 pid_t pid, char *pathname, char *command),
+	TP_ARGS(inode, pid, pathname, command),
+	TP_STRUCT__entry(
+		__string(pathbuf, pathname);
+		__field(loff_t,	i_size);
+		__string(cmdline, command);
+		__field(pid_t,	pid);
+		__field(ino_t,	ino);
+	),
+	TP_fast_assign(
+		{
+			/*
+			 * Replace the spaces in filenames and cmdlines
+			 * because this screws up the tooling that parses
+			 * the traces.
+			 */
+			__assign_str(pathbuf, pathname);
+			(void)strreplace(__get_str(pathbuf), ' ', '_');
+			__entry->i_size		= i_size_read(inode);
+			__assign_str(cmdline, command);
+			(void)strreplace(__get_str(cmdline), ' ', '_');
+			__entry->pid		= pid;
+			__entry->ino		= inode->i_ino;
+		}
+	),
+	TP_printk("entry_name %s, cmdline %s,"
+		  " pid %d, i_size %llu, ino %lu",
+		  __get_str(pathbuf),
+		  __get_str(cmdline), __entry->pid, __entry->i_size,
+		  (unsigned long) __entry->ino)
+);
+
 #endif /* _TRACE_ANDROID_FS_TEMPLATE_H */