This patch adds a tracepoint for f2fs_direct_IO.
Signed-off-by: Chao Yu <chao2.yu@xxxxxxxxxxx>
---
fs/f2fs/data.c | 5 ++++
include/trace/events/f2fs.h | 63 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 68 insertions(+)
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index ec3c886..03313099 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1086,9 +1086,14 @@ static ssize_t f2fs_direct_IO(int rw, struct kiocb *iocb,
/* clear fsync mark to recover these blocks */
fsync_mark_clear(F2FS_SB(inode->i_sb), inode->i_ino);
+ trace_f2fs_direct_IO_enter(inode, offset, count, rw);
+
err = blockdev_direct_IO(rw, iocb, inode, iter, offset, get_data_block);
if (err < 0 && (rw & WRITE))
f2fs_write_failed(mapping, offset + count);
+
+ trace_f2fs_direct_IO_exit(inode, offset, count, rw, err);
+
return err;
}
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 7d2e70e..d06d443 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -587,6 +587,69 @@ TRACE_EVENT(f2fs_fallocate,
__entry->ret)
);
+TRACE_EVENT(f2fs_direct_IO_enter,
+
+ TP_PROTO(struct inode *inode, loff_t offset, unsigned long len, int rw),
+
+ TP_ARGS(inode, offset, len, rw),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(ino_t, ino)
+ __field(loff_t, pos)
+ __field(unsigned long, len)
+ __field(int, rw)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->pos = offset;
+ __entry->len = len;
+ __entry->rw = rw;
+ ),
+
+ TP_printk("dev = (%d,%d), ino = %lu pos = %lld len = %lu rw = %d",
+ show_dev_ino(__entry),
+ __entry->pos,
+ __entry->len,
+ __entry->rw)
+);
+
+TRACE_EVENT(f2fs_direct_IO_exit,
+
+ TP_PROTO(struct inode *inode, loff_t offset, unsigned long len,
+ int rw, int ret),
+
+ TP_ARGS(inode, offset, len, rw, ret),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(ino_t, ino)
+ __field(loff_t, pos)
+ __field(unsigned long, len)
+ __field(int, rw)
+ __field(int, ret)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->pos = offset;
+ __entry->len = len;
+ __entry->rw = rw;
+ __entry->ret = ret;
+ ),
+
+ TP_printk("dev = (%d,%d), ino = %lu pos = %lld len = %lu "
+ "rw = %d ret = %d",
+ show_dev_ino(__entry),
+ __entry->pos,
+ __entry->len,
+ __entry->rw,
+ __entry->ret)
+);
+
TRACE_EVENT(f2fs_reserve_new_block,
TP_PROTO(struct inode *inode, nid_t nid, unsigned int ofs_in_node),
--
2.0.1.474.g72c7794
--
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