f2fs: add tracepoint for f2fs_direct_IO

This patch adds a tracepoint for f2fs_direct_IO.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index ec3c886..0331309 100644 (file)
--- 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 (file)
--- 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),