bio_split

函数名称：_split - split a bio*@bio: bio to split*@sectors: number of sectors to split from the front of @bio*@gfp: gfp mask*@bs: bio set to allocate from* Allocates and returns a new bio which represents @sectors from the start of

函数原型：struct bio *bio_split(struct bio *bio, int sectors, gfp_t gfp, struct bio_set *bs)

返回类型：struct bio

参数：

类型	参数	名称
struct bio *	bio
int	sectors
gfp_t	gfp
struct bio_set *	bs

1895

BUG_ON(sectors <= 0)

1896

BUG_ON(sectors >= bio_sectors(bio))

1898

split等于_clone_fast - clone a bio that shares the original bio's biovec*@bio: bio to clone*@gfp_mask: allocation priority*@bs: bio_set to allocate from* Like __bio_clone_fast, only also allocates the returned bio

1899

如果非split则返回:NULL

1902

residual I/O count 等于sectors左移9位

1904

如果bio_integrity(split)则bio_integrity_trim(split)

1907

_advance - increment/complete a bio by some number of bytes*@bio: bio to advance*@bytes: number of bytes to complete* This updates bi_sector, bi_size and bi_idx; if the number of bytes to* complete doesn't align with a bvec boundary, then bv_len and

1909

如果bio_flagged(bio, BIO_TRACE_COMPLETION)则bio_set_flag(split, BIO_TRACE_COMPLETION)

1912

返回:split

**调用者**
名称	描述
blk_bio_discard_split
blk_bio_write_zeroes_split
blk_bio_write_same_split
blk_bio_segment_split	lk_bio_segment_split - split a bio in two bios@q: [in] request queue pointer@bio: [in] bio to be split@bs: [in] bio set to allocate the clone from@segs: [out] number of segments in the bio with the first half of the sectors* Clone @bio, update the
__blk_queue_bounce
bio_next_split	_next_split - get next @sectors from a bio, splitting if necessary@bio: bio to split@sectors: number of sectors to split from the front of @bio@gfp: gfp mask@bs: bio set to allocate from* Returns a bio representing the next @sectors of @bio - if the

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

函数逻辑报告