get_pipe

函数名称：After the inode slimming patch, i_pipe/i_bdev/i_cdev share the same* location, so checking ->i_pipe is not enough to verify that this is a* pipe.

函数原型：struct pipe_inode_info *get_pipe_info(struct file *file)

返回类型：struct pipe_inode_info

参数：

类型	参数	名称
struct file *	file

**调用者**
名称	描述
pipe_fcntl
do_splice	Determine where to splice to/from.
vmsplice_to_user	For lack of a better implementation, implement vmsplice() to userspace* as a simple copy of the pipes pages to the user iov.
vmsplice_to_pipe	vmsplice splices a user address range into a pipe. It can be thought of* as splice-from-memory, where the regular splice is splice-from-file (or* to file). In both cases the output is a pipe, naturally.
do_tee	This is a tee(1) implementation that works on pipes. It doesn't copy* any data, it simply references the 'in' pages on the 'out' pipe.* The 'flags' used are the SPLICE_F_* variants, currently the only* applicable one is SPLICE_F_NONBLOCK.

函数逻辑报告