__blk_rq_prep_clone

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

Proto:static void __blk_rq_prep_clone(struct request *dst, struct request *src)

Type:void

Parameter:

Type	Parameter	Name
struct request *	dst
struct request *	src

1592

sector cursor = 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 = blk_rq_bytes(src)

1594

If rq_flags & Look at ->special_vec for the actual data payload instead of thebio chain. Then

1595

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

1596

special_vec = special_vec

1598

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

1599

ioprio = ioprio

1600

length of alignment and padding = length of alignment and padding

**Caller**
Name	Describe
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

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