pipe_full

函数名称：pipe_full - Return true if the pipe is full*@head: The pipe ring head pointer*@tail: The pipe ring tail pointer*@limit: The maximum amount of slots available.

函数原型：static inline bool pipe_full(unsigned int head, unsigned int tail, unsigned int limit)

返回类型：bool

参数：

类型	参数	名称
unsigned int	head
unsigned int	tail
unsigned int	limit

**调用者**
名称	描述
copy_page_to_iter_pipe
push_pipe
iov_iter_pipe
pipe_read
pipe_writable	Done while waiting without holding the pipe lock - thus the READ_ONCE()
pipe_write
pipe_poll	No kernel lock held - fine
splice_to_pipe	splice_to_pipe - fill passed data into a pipe@pipe: pipe to fill@spd: data to fill* Description:@spd contains a map of pages and len/offset tuples, along with the struct pipe_buf_operations associated with these pages. This
add_to_pipe
default_file_splice_read
wait_for_space
opipe_prep	Make sure there's writeable room. Wait for room if we can, otherwise* return an appropriate error.
splice_pipe_to_pipe
link_pipe	Link contents of ipipe to opipe.

函数逻辑报告