__blk_rq_prep_clone

函数名称：Copy attributes of the original request to the clone request.* The actual data parts (e.g. ->cmd, ->sense) are not copied.

函数原型：static void __blk_rq_prep_clone(struct request *dst, struct request *src)

返回类型：void

参数：

类型	参数	名称
struct request *	dst
struct request *	src

1592

sector cursor 等于lk_rq_pos() : the current sector* blk_rq_bytes() : bytes left in the entire request* blk_rq_cur_bytes() : bytes left in the current segment* blk_rq_err_bytes() : bytes left till the next error boundary* blk_rq_sectors() : sectors left in the entire

1593

total data len 等于blk_rq_bytes(src)

1594

如果rq_flags按位与Look at ->special_vec for the actual data payload instead of thebio chain. 则

1595

rq_flags或等于Look at ->special_vec for the actual data payload instead of thebio chain.

1596

special_vec等于special_vec

1598

* Number of scatter-gather DMA addr+len pairs after * physical address coalescing is performed.等于* Number of scatter-gather DMA addr+len pairs after * physical address coalescing is performed.

1599

ioprio等于ioprio

1600

length of alignment and padding 等于 length of alignment and padding

**调用者**
名称	描述
blk_rq_prep_clone	lk_rq_prep_clone - Helper function to setup clone request@rq: the request to be setup@rq_src: original request to be cloned@bs: bio_set that bios for clone are allocated from@gfp_mask: memory allocation mask for bio

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