函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\bpf\lpm_trie.c Create Date:2022-07-27 14:30:18
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：trie_free

函数原型：static void trie_free(struct bpf_map *map)

返回类型：void

参数：

类型参数名称
struct bpf_map *map
588  trie等于container_of - cast a member of a structure out to the containing structure*@ptr: the pointer to the member.*@type: the type of the container struct this is embedded in.*@member: the name of the member within the struct.(map, structlpm_trie, map)
589  __rcu乘slot
595  Wait for a grace period to elapse. But it is illegal to invoke* synchronize_rcu() from within an RCU read-side critical section.* Therefore, any legal call to synchronize_rcu() is a quiescent
602  循环
603  slot等于root
605  循环
606  node等于cu_dereference_protected() - fetch RCU pointer when updates prevented*@p: The pointer to read, prior to dereferencing*@c: The conditions under which the dereference will take place* Return the value of the specified RCU-protected pointer, but omit( * slot, 1)
607  如果非node则转到:out
610  如果cu_access_pointer() - fetch RCU pointer with no dereferencing*@p: The pointer to read* Return the value of the specified RCU-protected pointer, but omit the* lockdep checks for being in an RCU read-side critical section(child[0])则
611  slot等于child[0]
612  继续下一循环
615  如果cu_access_pointer() - fetch RCU pointer with no dereferencing*@p: The pointer to read* Return the value of the specified RCU-protected pointer, but omit the* lockdep checks for being in an RCU read-side critical section(child[1])则
616  slot等于child[1]
617  继续下一循环
620  kfree(node)
621  RCU_INIT_POINTER() - initialize an RCU protected pointer*@p: The pointer to be initialized.*@v: The value to initialized the pointer to.* Initialize an RCU-protected pointer in special cases where readers( * slot, NULL)
622  退出
626  out :
627  kfree(trie)