f2fs: introduce data read/write showing path info

This was used in Android for a long time. Let's upstream it.

Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 94 insertions, 0 deletions

diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 1779e133cea0..4d1ad64d4cab 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -2067,6 +2067,100 @@ TRACE_EVENT(f2fs_fiemap,
 		__entry->ret)
 );
 
+DECLARE_EVENT_CLASS(f2fs__rw_start,
+
+	TP_PROTO(struct inode *inode, loff_t offset, int bytes,
+			pid_t pid, char *pathname, char *command),
+
+	TP_ARGS(inode, offset, bytes, pid, pathname, command),
+
+	TP_STRUCT__entry(
+		__string(pathbuf, pathname)
+		__field(loff_t, offset)
+		__field(int, bytes)
+		__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->offset = offset;
+		__entry->bytes = bytes;
+		__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, offset %llu, bytes %d, cmdline %s,"
+		" pid %d, i_size %llu, ino %lu",
+		__get_str(pathbuf), __entry->offset, __entry->bytes,
+		__get_str(cmdline), __entry->pid, __entry->i_size,
+		(unsigned long) __entry->ino)
+);
+
+DECLARE_EVENT_CLASS(f2fs__rw_end,
+
+	TP_PROTO(struct inode *inode, loff_t offset, int bytes),
+
+	TP_ARGS(inode, offset, bytes),
+
+	TP_STRUCT__entry(
+		__field(ino_t,	ino)
+		__field(loff_t,	offset)
+		__field(int,	bytes)
+	),
+
+	TP_fast_assign(
+		__entry->ino		= inode->i_ino;
+		__entry->offset		= offset;
+		__entry->bytes		= bytes;
+	),
+
+	TP_printk("ino %lu, offset %llu, bytes %d",
+		(unsigned long) __entry->ino,
+		__entry->offset, __entry->bytes)
+);
+
+DEFINE_EVENT(f2fs__rw_start, f2fs_dataread_start,
+
+	TP_PROTO(struct inode *inode, loff_t offset, int bytes,
+		pid_t pid, char *pathname, char *command),
+
+	TP_ARGS(inode, offset, bytes, pid, pathname, command)
+);
+
+DEFINE_EVENT(f2fs__rw_end, f2fs_dataread_end,
+
+	TP_PROTO(struct inode *inode, loff_t offset, int bytes),
+
+	TP_ARGS(inode, offset, bytes)
+);
+
+DEFINE_EVENT(f2fs__rw_start, f2fs_datawrite_start,
+
+	TP_PROTO(struct inode *inode, loff_t offset, int bytes,
+		pid_t pid, char *pathname, char *command),
+
+	TP_ARGS(inode, offset, bytes, pid, pathname, command)
+);
+
+DEFINE_EVENT(f2fs__rw_end, f2fs_datawrite_end,
+
+	TP_PROTO(struct inode *inode, loff_t offset, int bytes),
+
+	TP_ARGS(inode, offset, bytes)
+);
+
 #endif /* _TRACE_F2FS_H */
 
  /* This part must be outside protection */