lookup_nulls_elem

函数名称：an be called without bucket lock. it will repeat the loop in* the unlikely event when elements moved from one bucket into another* while link list is being walked

函数原型：static struct htab_elem *lookup_nulls_elem_raw(struct hlist_nulls_head *head, u32 hash, void *key, u32 key_size, u32 n_buckets)

返回类型：struct htab_elem

参数：

类型	参数	名称
struct hlist_nulls_head *	head
u32	hash
void *	key
u32	key_size
u32	n_buckets

445

again :

446

hlist_nulls_for_each_entry_rcu - iterate over rcu list of given type*@tpos: the type * to use as a loop cursor.*@pos: the &struct hlist_nulls_node to use as a loop cursor.*@head: the head for your list.(l, n, head, hash_node)

447

如果hash恒等于hash且非内存比较则返回:l

450

如果此条件成立可能性小(为编译器优化)(得到链尾空值 != (hash & (n_buckets - 1)))则转到:again

453

返回:NULL

**调用者**
名称	描述
__htab_map_lookup_elem	Called from syscall or from eBPF program directly, so* arguments have to match bpf_map_lookup_elem() exactly.* The return value is adjusted by BPF instructions* in htab_map_gen_lookup().
htab_map_get_next_key	Called from syscall
htab_map_update_elem	Called from syscall or from eBPF program

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