函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\bpf\arraymap.c Create Date:2022-07-27 14:27:58
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：prog_array_map_seq_show_elem

函数原型：static void prog_array_map_seq_show_elem(struct bpf_map *map, void *key, struct seq_file *m)

返回类型：void

参数：

类型参数名称
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等于Called from syscall or from eBPF program
675  如果elem则
676  ptr等于READ_ONCE( * elem)
677  如果ptr则
678  seq_printf(m, "%u: ", * (u32 * )key)
679  prog_id等于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()