Function report |
Source Code:kernel\bpf\local_storage.c |
Create Date:2022-07-28 13:14:08 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Annotation kernel can get tool activity | Download SCCT | Chinese |
Name:cgroup_storage_update_elem
Proto:static int cgroup_storage_update_elem(struct bpf_map *map, void *_key, void *value, u64 flags)
Type:int
Parameter:
Type | Parameter | Name |
---|---|---|
struct bpf_map * | map | |
void * | _key | |
void * | value | |
u64 | flags |
134 | If Value for the false possibility is greater at compile time(flags & ~(spin_lock-ed map_lookup/map_update | update existing element | create new element if it didn't exist )) Then Return -EINVAL |
137 | If Value for the false possibility is greater at compile time(flags & create new element if it didn't exist ) Then Return -EINVAL |
140 | If Value for the false possibility is greater at compile time((flags & spin_lock-ed map_lookup/map_update ) && !map_value_has_spin_lock(map)) Then Return -EINVAL |
144 | storage = cgroup_storage_lookup((structbpf_cgroup_storage_map * )map, key, false) |
149 | If flags & spin_lock-ed map_lookup/map_update Then |
150 | copy_map_value_locked(map, data, value, false) |
151 | Return 0 |
161 | No 3D Now!( & data[0], value, value_size) |
162 | check_and_init_map_lock(map, data) |
167 | Return 0 |
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