do_splice_direct

函数名称：do_splice_direct - splices data directly between two files*@in: file to splice from*@ppos: input file offset*@out: file to splice to*@opos: output file offset*@len: number of bytes to splice*@flags: splice modifier flags* Description:

函数原型：long do_splice_direct(struct file *in, loff_t *ppos, struct file *out, loff_t *opos, size_t len, unsigned int flags)

返回类型：long

参数：

类型	参数	名称
struct file *	in
loff_t *	ppos
struct file *	out
loff_t *	opos
size_t	len
unsigned int	flags

1060

struct splice_desc sd = {current length = len, maining length = len, splice flags = flags, le position = * ppos, le to read/write = out, sendfile: output position = opos, }

1070

如果此条件成立可能性小(为编译器优化)(!(f_mode & le is open for writing ))则返回:负EBADF

1073

如果此条件成立可能性小(为编译器优化)(f_flags & O_APPEND)则返回:负EINVAL

1076

ret等于rw_verify_area(WRITE, out, opos, len)

1077

如果此条件成立可能性小(为编译器优化)(ret < 0)则返回:ret

1080

ret等于splice_direct_to_actor - splices data directly between two non-pipes*@in: file to splice from*@sd: actor information on where to splice to*@actor: handles the data splicing* Description:* This is a special case helper to splice directly between two

1081

如果ret大于0则ppos等于le position

1084

返回:ret

**调用者**
名称	描述
generic_copy_file_range	generic_copy_file_range - copy data between two files@file_in: file structure to read from@pos_in: file offset to read from@file_out: file structure to write data to@pos_out: file offset to write data to@len: amount of data to copy@flags: copy flags
do_sendfile

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

函数逻辑报告