From: Zheng Liu <wenqing.lz@xxxxxxxxxx>
This patch adds a tracepoint in ext4_punch_hole.
CC: Lukas Czerner <lczerner@xxxxxxxxxx>
Signed-off-by: Zheng Liu <wenqing.lz@xxxxxxxxxx>
---
fs/ext4/inode.c | 2 ++
include/trace/events/ext4.h | 25 +++++++++++++++++++++++++
2 files changed, 27 insertions(+), 0 deletions(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index dde62e0..169eab3 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3495,6 +3495,8 @@ int ext4_punch_hole(struct file *file, loff_t offset, loff_t length)
if (!S_ISREG(inode->i_mode))
return -EOPNOTSUPP;
+ trace_ext4_punch_hole(inode, offset, length);
+
if (!ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
return ext4_ind_punch_hole(file, offset, length);
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index 69d8a69..58bec84 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -1311,6 +1311,31 @@ TRACE_EVENT(ext4_fallocate_exit,
__entry->ret)
);
+TRACE_EVENT(ext4_punch_hole,
+ 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_unlink_enter,
TP_PROTO(struct inode *parent, struct dentry *dentry),
--
1.7.4.1
--
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