Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\bpf\cpumap.c Create Date:2022-07-28 13:23:57
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Name:cpu_map_delete_elem

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

Type:int

Parameter:

TypeParameterName
struct bpf_map *map
void *key
457  cmap = 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_cpu_map, map)
458  key_cpu = key
460  If key_cpu >= max_entries Then Return -EINVAL
464  After xchg pointer to bpf_cpu_map_entry, use the call_rcu() to* ensure any driver rcu critical sections have completed, but this* does not guarantee a flush has happened yet. Because driver side* rcu_read_lock/unlock only protects the running XDP program
465  Return 0