blk_rq_bytes

函数名称：blk_rq_bytes

函数原型：static inline unsigned int blk_rq_bytes(const struct request *rq)

返回类型：unsigned int

参数：

类型	参数	名称
const struct request *	rq

929

返回: total data len

**调用者**
名称	描述
blk_dump_rq_flags
blk_insert_cloned_request	lk_insert_cloned_request - Helper for stacking drivers to submit a request@q: the queue to submit the request@rq: the request being queued
blk_rq_err_bytes	lk_rq_err_bytes - determine number of bytes till the next failure boundary@rq: request to examine Description:* A request could be merge of IOs which require different failure* handling
blk_update_request	lk_update_request - Special helper function for request stacking drivers@req: the request being processed@error: block status code@nr_bytes: number of bytes to complete @req Description:* Ends I/O on a number of bytes attached to @req, but doesn't
__blk_rq_prep_clone	Copy attributes of the original request to the clone request.* The actual data parts (e.g. ->cmd, ->sense) are not copied.
blk_rq_map_sg	map a request to scatterlist, return number of sg entries setup. Caller* must make sure sg can hold rq->nr_phys_segments entries
attempt_merge	For non-mq, this has to be called with the request spinlock acquired.* For mq with scheduling, the appropriate queue wide lock should be held.
blk_mq_end_request
blk_mq_start_request
__blk_mq_requeue_request
blk_mq_make_request
bsg_map_buffer
blk_rq_sectors
blk_rq_payload_bytes	Some commands like WRITE SAME have a payload or data transfer size which* is different from the size of the request. Any driver that supports such* commands using the RQF_SPECIAL_PAYLOAD flag needs to use this helper to* calculate the data transfer size.

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