blkg_tryget_closest

函数名称：lkg_tryget_closest - try and get a blkg ref on the closet blkg*@blkg: blkg to get* This needs to be called rcu protected. As the failure mode here is to walk* up the blkg tree, this ensure that the blkg->parent pointers are always* valid

函数原型：static inline struct blkcg_gq *blkg_tryget_closest(struct blkcg_gq *blkg)

返回类型：struct blkcg_gq

参数：

类型	参数	名称
struct blkcg_gq *	blkg

503

struct blkcg_gq * ret_blkg = NULL

505

WARN_ON_ONCE(!rcu_read_lock_held())

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当blkg 循环

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如果lkg_tryget - try and get a blkg reference*@blkg: blkg to get* This is for use when doing an RCU lookup of the blkg. We may be in the midst* of freeing this blkg, so we can only use it if the refcnt is not zero.则

509

ret_blkg等于blkg

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退出

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blkg等于 all non-root blkcg_gq's are guaranteed to have access to parent

515

返回:ret_blkg

**调用者**
名称	描述
__bio_associate_blkg	__bio_associate_blkg - associate a bio with the a blkg@bio: target bio@blkg: the blkg to associate* This tries to associate @bio with the specified @blkg. Association failure* is handled by walking up the blkg tree. Therefore, the blkg associated can

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