Commit 126ce721 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs: add tracepoint for f2fs_file_write_iter() 



This patch adds tracepoint for f2fs_file_write_iter().

Signed-off-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent e1074d4b

fs/f2fs/file.c

+19 −9
Original line number Diff line number Diff line
@@ -3035,15 +3035,21 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) 
	struct inode *inode = file_inode(file);

	ssize_t ret;



	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))

		return -EIO;

	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) {

		ret = -EIO;

		goto out;

	}



	if ((iocb->ki_flags & IOCB_NOWAIT) && !(iocb->ki_flags & IOCB_DIRECT))

		return -EINVAL;

	if ((iocb->ki_flags & IOCB_NOWAIT) && !(iocb->ki_flags & IOCB_DIRECT)) {

		ret = -EINVAL;

		goto out;

	}



	if (!inode_trylock(inode)) {

		if (iocb->ki_flags & IOCB_NOWAIT)

			return -EAGAIN;

		if (iocb->ki_flags & IOCB_NOWAIT) {

			ret = -EAGAIN;

			goto out;

		}

		inode_lock(inode);

	}
@@ -3066,7 +3072,8 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) 
						clear_inode_flag(inode,

								FI_NO_PREALLOC);

						inode_unlock(inode);

						return -EAGAIN;

						ret = -EAGAIN;

						goto out;

				}



		} else {
@@ -3077,7 +3084,8 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) 
			if (err) {

				clear_inode_flag(inode, FI_NO_PREALLOC);

				inode_unlock(inode);

				return err;

				ret = err;

				goto out;

			}

		}

		ret = __generic_file_write_iter(iocb, from);
@@ -3091,7 +3099,9 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) 
			f2fs_update_iostat(F2FS_I_SB(inode), APP_WRITE_IO, ret);

	}

	inode_unlock(inode);



out:

	trace_f2fs_file_write_iter(inode, iocb->ki_pos,

					iov_iter_count(from), ret);

	if (ret > 0)

		ret = generic_write_sync(iocb, ret);

	return ret;

include/trace/events/f2fs.h

+31 −0
Original line number Diff line number Diff line
@@ -533,6 +533,37 @@ TRACE_EVENT(f2fs_truncate_partial_nodes, 
		__entry->err)

);



TRACE_EVENT(f2fs_file_write_iter,



	TP_PROTO(struct inode *inode, unsigned long offset,

		unsigned long length, int ret),



	TP_ARGS(inode, offset, length, ret),



	TP_STRUCT__entry(

		__field(dev_t,	dev)

		__field(ino_t,	ino)

		__field(unsigned long, offset)

		__field(unsigned long, length)

		__field(int,	ret)

	),



	TP_fast_assign(

		__entry->dev	= inode->i_sb->s_dev;

		__entry->ino	= inode->i_ino;

		__entry->offset	= offset;

		__entry->length	= length;

		__entry->ret	= ret;

	),



	TP_printk("dev = (%d,%d), ino = %lu, "

		"offset = %lu, length = %lu, written(err) = %d",

		show_dev_ino(__entry),

		__entry->offset,

		__entry->length,

		__entry->ret)

);



TRACE_EVENT(f2fs_map_blocks,

	TP_PROTO(struct inode *inode, struct f2fs_map_blocks *map, int ret),