函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:block\bio.c Create Date:2022-07-27 18:30:57
Last Modify:2020-03-17 23:13:58 Copyright©Brick
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函数名称：bio_free_pages

函数原型：void bio_free_pages(struct bio *bio)

返回类型：void

参数：

类型参数名称
struct bio *bio
1227  drivers should _never_ use the all version - the bio may have been split* before it got to the driver and the driver won't own all of it(bvec, bio, iter_all)
1228  __free_page(bv_page)
调用者
名称描述
bio_uncopy_user_uncopy_user - finish previously mapped bio*@bio: bio being terminated* Free pages allocated from bio_copy_user_iov() and write back data* to user space in case of a read.
bio_copy_user_iov_copy_user_iov - copy user data to bio*@q: destination block queue*@map_data: pointer to the rq_map_data holding pages (if necessary)*@iter: iovec iterator*@gfp_mask: memory allocation flags* Prepares and returns a bio for indirect user io, bouncing data
bio_copy_kern_endio
bio_copy_kern_copy_kern - copy kernel address into bio*@q: the struct request_queue for the bio*@data: pointer to buffer to copy*@len: length in bytes*@gfp_mask: allocation flags for bio and page allocation*@reading: data direction is READ* copy the kernel address