Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\bpf\arraymap.c Create Date:2022-07-28 13:11:38
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name:prog_array_map_seq_show_elem

Proto:static void prog_array_map_seq_show_elem(struct bpf_map *map, void *key, struct seq_file *m)

Type:void

Parameter:

TypeParameterName
struct bpf_map *map
void *key
struct seq_file *m
672  _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
674  elem = Called from syscall or from eBPF program
675  If elem Then
676  ptr = READ_ONCE( * elem)
677  If ptr Then
678  seq_printf(m, "%u: ", * (u32 * )key)
679  prog_id = prog_fd_array_sys_lookup_elem(ptr)
680  btf_type_seq_show(btf, btf_value_type_id, & prog_id, m)
682  seq_puts(m, "\n")
686  _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()