__htab_map_lookup

Name: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().

Proto:static void *__htab_map_lookup_elem(struct bpf_map *map, void *key)

Type:void

Parameter:

Type	Parameter	Name
struct bpf_map *	map
void *	key

463

htab = 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, structbpf_htab, map)

469

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)

471

key_size = key_size

473

hash = htab_map_hash(key, key_size, hashrnd)

475

head = select_bucket(htab, hash)

477

l = 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

479

Return l

**Caller**
Name	Describe
htab_map_lookup_elem
__htab_lru_map_lookup_elem
htab_percpu_map_lookup_elem	Called from eBPF program
htab_lru_percpu_map_lookup_elem
bpf_percpu_hash_copy
htab_percpu_map_seq_show_elem

Source code conversion tool public plug-in interface	X
Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion

Function report