函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:block\blk-merge.c Create Date:2022-07-27 18:40:49
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：blk_bio_write_zeroes_split

函数原型：static struct bio *blk_bio_write_zeroes_split(struct request_queue *q, struct bio *bio, struct bio_set *bs, unsigned *nsegs)

返回类型：struct bio

参数：

类型参数名称
struct request_queue *q
struct bio *bio
struct bio_set *bs
unsigned *nsegs
108  nsegs等于0
110  如果非max_write_zeroes_sectors则返回:NULL
113  如果bio_sectors(bio)小于等于max_write_zeroes_sectors则返回:NULL
116  返回:_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
调用者
名称描述
__blk_queue_split__blk_queue_split - split a bio and submit the second half*@q: [in] request queue pointer*@bio: [in, out] bio to be split*@nr_segs: [out] number of segments in the first bio* Split a bio into two bios, chain the two bios, submit the second half and