linux-ext4 - [PATCH 2/2 v2] ext4: add a variable to record the value of map->m

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Date:	Tue, 16 Oct 2012 20:35:34 +0800
From:	Zheng Liu <gnehzuil.liu@...il.com>
To:	linux-ext4@...r.kernel.org
Cc:	Lukas Czerner <lczerner@...hat.com>,
	Zheng Liu <wenqing.lz@...bao.com>
Subject: [PATCH 2/2 v2] ext4: add a variable to record the value of map->m_flags in tracepoint

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

When we use trace_ext4_ext/ind_map_blocks_exit, we will print the value of
map->m_flags in order that we can understand what currently status is.

CC: Lukas Czerner <lczerner@...hat.com>
Signed-off-by: Zheng Liu <wenqing.lz@...bao.com>
---
v2 <- v1:
	pass the whole ext4_map_blocks instead of lblk, pblk, flags and len
	change type of 'flags' from 'int' to 'unsigned int'

 fs/ext4/extents.c           |  3 +--
 fs/ext4/indirect.c          |  3 +--
 include/trace/events/ext4.h | 27 +++++++++++++--------------
 3 files changed, 15 insertions(+), 18 deletions(-)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 4ecc210..a29b3f8 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4249,8 +4249,7 @@ out2:
 		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;
 }
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index 792e388..292337f 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -755,8 +755,7 @@ cleanup:
 		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;
 }
 
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index 25914e3..d2a125a 100644
--- a/include/trace/events/ext4.h
+++ b/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,
-- 
1.7.12.rc2.18.g61b472e

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