iov_iter_rw

函数名称：iov_iter_rw

函数原型：static inline unsigned char iov_iter_rw(const struct iov_iter *i)

返回类型：unsigned char

参数：

类型	参数	名称
const struct iov_iter *	i

86

返回:* 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generic data direction definitions 按位或WRITE的值

**调用者**
名称	描述
iov_iter_get_pages
iov_iter_get_pages_alloc
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
do_vmsplice	Note that vmsplice only really supports true splicing _from_ user memory* to a pipe, not the other way around. Splicing from user memory is a simple* operation that can be supported without any funky alignment restrictions* or nasty vm tricks
__blkdev_direct_IO_simple
__blkdev_direct_IO
do_blockdev_direct_IO	This is a library function for use by filesystem drivers
dax_iomap_actor
dax_iomap_rw	dax_iomap_rw - Perform I/O to a DAX file@iocb: The control block for this I/O@iter: The addresses to do I/O from or to@ops: iomap ops passed from the file system This function performs read and write operations to directly mapped* persistent memory
iomap_dio_rw	map_dio_rw() always completes O_[D]SYNC writes regardless of whether the IO* is being issued as AIO or not. This allows us to optimise pure data writes* to use REQ_FUA rather than requiring generic_write_sync() to issue a* REQ_FLUSH post write

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