[RFC][PATCH 10/10 v1][RESEND] ext4: add two tracepoints in punching hole

Zheng Liu
2012-07-22T07:59:46Z

This patch adds two tracepoints in ext4_ext_punch_hole.

Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
---
fs/ext4/extents.c | 3 ++
include/trace/events/ext4.h | 53 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 56 insertions(+), 0 deletions(-)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 2a526b4..0fb4ff5 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4529,6 +4529,8 @@ int ext4_ext_punch_hole(struct file *file, loff_t offset, loff_t length)
loff_t first_page_offset, last_page_offset;
int credits, err = 0;

+ trace_ext4_ext_punch_hole_enter(inode, offset, length);
+
mutex_lock(&inode->i_mutex);

/* No need to punch hole beyond i_size */
@@ -4663,6 +4665,7 @@ out:
ext4_journal_stop(handle);
error:
mutex_unlock(&inode->i_mutex);
+ trace_ext4_ext_punch_hole_exit(inode, offset, length, err);
return err;
}
int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index 5c17592..583f066 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -1312,6 +1312,59 @@ TRACE_EVENT(ext4_fallocate_exit,
__entry->ret)
);

+TRACE_EVENT(ext4_ext_punch_hole_enter,
+ TP_PROTO(struct inode *inode, loff_t offset, loff_t len),
+
+ TP_ARGS(inode, offset, len),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( ino_t, ino )
+ __field( loff_t, offset )
+ __field( loff_t, len )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->offset = offset;
+ __entry->len = len;
+ ),
+
+ TP_printk("dev %d,%d ino %lu offset %lld len %lld",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ (unsigned long) __entry->ino,
+ __entry->offset, __entry->len)
+);
+
+TRACE_EVENT(ext4_ext_punch_hole_exit,
+ TP_PROTO(struct inode *inode, loff_t offset,
+ loff_t len, int err),
+
+ TP_ARGS(inode, offset, len, err),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( ino_t, ino )
+ __field( loff_t, offset )
+ __field( loff_t, len )
+ __field( int, err )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->offset = offset;
+ __entry->len = len;
+ __entry->err = err;
+ ),
+
+ TP_printk("dev %d,%d ino %lu offset %lld len %lld err %d",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ (unsigned long) __entry->ino,
+ __entry->offset, __entry->len, __entry->err)
+);
+
TRACE_EVENT(ext4_unlink_enter,
TP_PROTO(struct inode *parent, struct dentry *dentry),

--
1.7.4.1