函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:block\blk-cgroup.c Create Date:2022-07-27 19:15:19
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Performs queue bypass and policy enabled checks then looks up blkg.

函数原型：static struct blkcg_gq *blkg_lookup_check(struct blkcg *blkcg, const struct blkcg_policy *pol, struct request_queue *q)

返回类型：struct blkcg_gq

参数：

类型参数名称
struct blkcg *blkcg
const struct blkcg_policy *pol
struct request_queue *q
569  WARN_ON_ONCE(!_read_lock_held() - might we be in RCU read-side critical section?* If CONFIG_DEBUG_LOCK_ALLOC is selected, returns nonzero iff in an RCU* read-side critical section)
570  lockdep_assert_held( & queue_lock)
572  如果非blkcg_policy_enabled(q, pol)则返回:错误号
574  返回:__blkg_lookup - internal version of blkg_lookup()*@blkcg: blkcg of interest*@q: request_queue of interest*@update_hint: whether to update lookup hint with the result or not* This is internal version and shouldn't be used by policy* implementations
调用者
名称描述
blkg_conf_preplkg_conf_prep - parse and prepare for per-blkg config update*@blkcg: target block cgroup*@pol: target policy*@input: input string*@ctx: blkg_conf_ctx to be filled* Parse per-blkg config update from @input and initialize @ctx with the* result