iov_iter_advance

函数名称：iov_iter_advance

函数原型：void iov_iter_advance(struct iov_iter *i, size_t size)

返回类型：void

参数：

类型	参数	名称
struct iov_iter *	i
size_t	size

1066

如果此条件成立可能性小(为编译器优化)(iov_iter_is_pipe(i))则

1067

pipe_advance(i, size)

1068

返回

1070

如果此条件成立可能性小(为编译器优化)(iov_iter_is_discard(i))则

1071

count减等于size

1072

返回

1074

iterate_and_advance(i, size, v, 0, 0, 0)

**调用者**
名称	描述
_copy_from_iter_full
_copy_from_iter_full_nocache
csum_and_copy_from_iter_full
__bio_iov_iter_get_pages	__bio_iov_iter_get_pages - pin user or kernel pages and add them to a bio@bio: bio to add pages to@iter: iov iterator describing the region to be mapped* Pins pages from *iter and appends them to @bio's bvec array. The
bio_copy_user_iov	_copy_user_iov - copy user data to bio@q: destination block queue@map_data: pointer to the rq_map_data holding pages (if necessary)@iter: iovec iterator@gfp_mask: memory allocation flags* Prepares and returns a bio for indirect user io, bouncing data
bio_map_user_iov	_map_user_iov - map user iovec into bio@q: the struct request_queue for the bio@iter: iovec iterator@gfp_mask: memory allocation flags Map the user space address into a bio suitable for io to a block* device. Returns an error pointer in case of error.
generic_file_splice_read	generic_file_splice_read - splice data from file to a pipe@in: file to splice from@ppos: position in @in@pipe: pipe to splice to@len: number of bytes to splice@flags: splice modifier flags Description:
default_file_splice_read
iter_to_pipe
dio_refill_pages	Go grab and pin some userspace pages. Typically we'll get 64 at a time.
io_import_fixed
loop_rw_iter	For files that don't have ->read_iter() and ->write_iter(), handle them* by looping over ->read() or ->write() manually.
iomap_write_actor
generic_perform_write
__bio_iov_bvec_add_pages
do_loop_readv_writev	Do it by hand, with file-ops

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码