iov_iter_fault_in

函数名称：Fault in one or more iovecs of the given iov_iter, to a maximum length of* bytes. For each iovec, fault in each page that constitutes the iovec.* Return 0 on success, or non-zero if the memory could not be accessed (i.e.* because it is an invalid address).

函数原型：int iov_iter_fault_in_readable(struct iov_iter *i, size_t bytes)

返回类型：int

参数：

类型	参数	名称
struct iov_iter *	i
size_t	bytes

424

skip等于iov_offset

429

如果非* Bit 0 is the read/write bit, set if we're writing. * Bit 1 is the BVEC_FLAG_NO_REF bit, set if type is a bvec and * the caller isn't expecting to drop a page reference when done.按位与ITER_BVEC按位或ITER_KVEC的值的值则

430

iterate_iovec(i, bytes, v, iov, skip, ({err = fault_in_pages_readable( BSD uses caddr_t (1003.1g requires void *) , Must be size_t (1003.1g) );如果此条件成立可能性小(为编译器优化)(err)则返回err;0;}))

436

返回:0

**调用者**
名称	描述
generic_perform_write
iomap_write_actor

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

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