bpf_fd_htab_map_lookup_elem

Name:ly called from syscall

Proto:int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value)

Type:int

Parameter:

Type	Parameter	Name
struct bpf_map *	map
void *	key
u32 *	value

1416

ret = 0

1418

If Not map_fd_sys_lookup_elem Then Return -Operation is not supported

1421

_read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other

1422

ptr = htab_map_lookup_elem(map, key)

1423

If ptr Then value = map_fd_sys_lookup_elem(READ_ONCE( * ptr))

1425

Else ret = -ENOENT

1427

_read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()

1429

Return ret

**Caller**
Name	Describe
map_lookup_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