ext4: print map->m_flags in trace_ext4_ext/ind_map_blocks_exit

When we use trace_ext4_ext/ind_map_blocks_exit, print the value of
map->m_flags in order that we can understand the extent's current
status.
Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

fs/ext4/extents.c

@@ -4284,8 +4284,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
 		kfree(path);
 	}
 
-	trace_ext4_ext_map_blocks_exit(inode, map->m_lblk,
-		newblock, map->m_len, err ? err : allocated);
+	trace_ext4_ext_map_blocks_exit(inode, map, err ? err : allocated);
 
 	return err ? err : allocated;
 }

fs/ext4/indirect.c

@@ -755,8 +755,7 @@ int ext4_ind_map_blocks(handle_t *handle, struct inode *inode,
 		partial--;
 	}
 out:
-	trace_ext4_ind_map_blocks_exit(inode, map->m_lblk,
-				map->m_pblk, map->m_len, err);
+	trace_ext4_ind_map_blocks_exit(inode, map, err);
 	return err;
 }
 

include/trace/events/ext4.h

@@ -1519,10 +1519,9 @@ DEFINE_EVENT(ext4__map_blocks_enter, ext4_ind_map_blocks_enter,
 );
 
 DECLARE_EVENT_CLASS(ext4__map_blocks_exit,
-	TP_PROTO(struct inode *inode, ext4_lblk_t lblk,
-		 ext4_fsblk_t pblk, unsigned int len, int ret),
+	TP_PROTO(struct inode *inode, struct ext4_map_blocks *map, int ret),
 
-	TP_ARGS(inode, lblk, pblk, len, ret),
+	TP_ARGS(inode, map, ret),
 
 	TP_STRUCT__entry(
 		__field(	dev_t,		dev		)
@@ -1530,37 +1529,37 @@ DECLARE_EVENT_CLASS(ext4__map_blocks_exit,
 		__field(	ext4_fsblk_t,	pblk		)
 		__field(	ext4_lblk_t,	lblk		)
 		__field(	unsigned int,	len		)
+		__field(	unsigned int,	flags		)
 		__field(	int,		ret		)
 	),
 
 	TP_fast_assign(
 		__entry->dev    = inode->i_sb->s_dev;
 		__entry->ino    = inode->i_ino;
-		__entry->pblk	= pblk;
-		__entry->lblk	= lblk;
-		__entry->len	= len;
+		__entry->pblk	= map->m_pblk;
+		__entry->lblk	= map->m_lblk;
+		__entry->len	= map->m_len;
+		__entry->flags	= map->m_flags;
 		__entry->ret	= ret;
 	),
 
-	TP_printk("dev %d,%d ino %lu lblk %u pblk %llu len %u ret %d",
+	TP_printk("dev %d,%d ino %lu lblk %u pblk %llu len %u flags %x ret %d",
 		  MAJOR(__entry->dev), MINOR(__entry->dev),
 		  (unsigned long) __entry->ino,
 		  __entry->lblk, __entry->pblk,
-		  __entry->len, __entry->ret)
+		  __entry->len, __entry->flags, __entry->ret)
 );
 
 DEFINE_EVENT(ext4__map_blocks_exit, ext4_ext_map_blocks_exit,
-	TP_PROTO(struct inode *inode, ext4_lblk_t lblk,
-		 ext4_fsblk_t pblk, unsigned len, int ret),
+	TP_PROTO(struct inode *inode, struct ext4_map_blocks *map, int ret),
 
-	TP_ARGS(inode, lblk, pblk, len, ret)
+	TP_ARGS(inode, map, ret)
 );
 
 DEFINE_EVENT(ext4__map_blocks_exit, ext4_ind_map_blocks_exit,
-	TP_PROTO(struct inode *inode, ext4_lblk_t lblk,
-		 ext4_fsblk_t pblk, unsigned len, int ret),
+	TP_PROTO(struct inode *inode, struct ext4_map_blocks *map, int ret),
 
-	TP_ARGS(inode, lblk, pblk, len, ret)
+	TP_ARGS(inode, map, ret)
 );
 
 TRACE_EVENT(ext4_ext_load_extent,