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Date:	Sun, 22 Jul 2012 15:46:02 +0800
From:	Zheng Liu <gnehzuil.liu@...il.com>
To:	linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org
Cc:	xiaoqiangnk@...il.com, achender@...ux.vnet.ibm.com,
	wenqing.lz@...bao.com
Subject: [RFC][PATCH 05/10 v1] ext4: add some tracepoints in extent status tree

From: Zheng Liu <wenqing.lz@...bao.com>

This patch adds some tracepoints in extent status tree.

Signed-off-by: Zheng Liu <wenqing.lz@...bao.com>
---
 fs/ext4/extents_status.c    |    8 +++
 include/trace/events/ext4.h |  101 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 109 insertions(+), 0 deletions(-)

diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
index bd4e589..1c82340 100644
--- a/fs/ext4/extents_status.c
+++ b/fs/ext4/extents_status.c
@@ -10,6 +10,8 @@
 #include "extents_status.h"
 #include "ext4_extents.h"
 
+#include <trace/events/ext4.h>
+
 /*
  * extents status tree implementation for ext4.
  *
@@ -188,6 +190,8 @@ ext4_lblk_t ext4_es_find_extent(struct inode *inode, struct extent_status *es)
 	struct rb_node *node;
 	ext4_lblk_t ret = EXT_MAX_BLOCKS;
 
+	trace_ext4_es_find_extent_enter(inode, es->start);
+
 	es->len = 0;
 	tree = &EXT4_I(inode)->i_es_tree;
 	es1 = __es_tree_search(&tree->root, es->start);
@@ -202,6 +206,8 @@ ext4_lblk_t ext4_es_find_extent(struct inode *inode, struct extent_status *es)
 		}
 	}
 
+	trace_ext4_es_find_extent_exit(inode, es, ret);
+
 	return ret;
 }
 
@@ -282,6 +288,7 @@ int ext4_es_add_space(struct inode *inode, ext4_lblk_t offset, ext4_lblk_t len)
 	BUG_ON(end <= offset);
 
 	es = tree->cache_es;
+	trace_ext4_es_add_space(inode, offset, len);
 	es_debug("add [%u/%u) to extent status tree of inode %lu\n",
 		 offset, len, inode->i_ino);
 
@@ -351,6 +358,7 @@ int ext4_es_remove_space(struct inode *inode, ext4_lblk_t offset,
 	struct extent_status orig_es;
 	ext4_lblk_t len1, len2, end;
 
+	trace_ext4_es_remove_space(inode, offset, len);
 	es_debug("remove [%u/%u) from extent status tree of inode %lu\n",
 		 offset, len, inode->i_ino);
 
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index 69d8a69..5c17592 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -15,6 +15,7 @@ struct ext4_inode_info;
 struct mpage_da_data;
 struct ext4_map_blocks;
 struct ext4_extent;
+struct extent_status;
 
 #define EXT4_I(inode) (container_of(inode, struct ext4_inode_info, vfs_inode))
 
@@ -2055,6 +2056,106 @@ TRACE_EVENT(ext4_ext_remove_space_done,
 		  (unsigned short) __entry->eh_entries)
 );
 
+TRACE_EVENT(ext4_es_add_space,
+	TP_PROTO(struct inode *inode, ext4_lblk_t start, ext4_lblk_t len),
+
+	TP_ARGS(inode, start, len),
+
+	TP_STRUCT__entry(
+		__field(	dev_t,	dev			)
+		__field(	ino_t,	ino			)
+		__field(	loff_t,	start			)
+		__field(	loff_t, len			)
+	),
+
+	TP_fast_assign(
+		__entry->dev	= inode->i_sb->s_dev;
+		__entry->ino	= inode->i_ino;
+		__entry->start	= start;
+		__entry->len	= len;
+	),
+
+	TP_printk("dev %d,%d ino %lu es [%lld/%lld)",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  (unsigned long) __entry->ino,
+		  __entry->start, __entry->len)
+);
+
+TRACE_EVENT(ext4_es_remove_space,
+	TP_PROTO(struct inode *inode, ext4_lblk_t start, ext4_lblk_t len),
+
+	TP_ARGS(inode, start, len),
+
+	TP_STRUCT__entry(
+		__field(	dev_t,	dev			)
+		__field(	ino_t,	ino			)
+		__field(	loff_t,	start			)
+		__field(	loff_t,	len			)
+	),
+
+	TP_fast_assign(
+		__entry->dev	= inode->i_sb->s_dev;
+		__entry->ino	= inode->i_ino;
+		__entry->start	= start;
+		__entry->len	= len;
+	),
+
+	TP_printk("dev %d,%d ino %lu es [%lld/%lld)",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  (unsigned long) __entry->ino,
+		  __entry->start, __entry->len)
+);
+
+TRACE_EVENT(ext4_es_find_extent_enter,
+	TP_PROTO(struct inode *inode, ext4_lblk_t start),
+
+	TP_ARGS(inode, start),
+
+	TP_STRUCT__entry(
+		__field(	dev_t,		dev		)
+		__field(	ino_t,		ino		)
+		__field(	ext4_lblk_t,	start		)
+	),
+
+	TP_fast_assign(
+		__entry->dev	= inode->i_sb->s_dev;
+		__entry->ino	= inode->i_ino;
+		__entry->start	= start;
+	),
+
+	TP_printk("dev %d,%d ino %lu start %u",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  (unsigned long) __entry->ino, __entry->start)
+);
+
+TRACE_EVENT(ext4_es_find_extent_exit,
+	TP_PROTO(struct inode *inode, struct extent_status *es,
+		 ext4_lblk_t ret),
+
+	TP_ARGS(inode, es, ret),
+
+	TP_STRUCT__entry(
+		__field(	dev_t,		dev		)
+		__field(	ino_t,		ino		)
+		__field(	ext4_lblk_t,	start		)
+		__field(	ext4_lblk_t,	len		)
+		__field(	ext4_lblk_t,	ret		)
+	),
+
+	TP_fast_assign(
+		__entry->dev	= inode->i_sb->s_dev;
+		__entry->ino	= inode->i_ino;
+		__entry->start	= es->start;
+		__entry->len	= es->len;
+		__entry->ret	= ret;
+	),
+
+	TP_printk("dev %d,%d ino %lu es [%u/%u) ret %u",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  (unsigned long) __entry->ino,
+		  __entry->start, __entry->len, __entry->ret)
+);
+
 #endif /* _TRACE_EXT4_H */
 
 /* This part must be outside protection */
-- 
1.7.4.1

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