Function report |
Source Code:kernel\bpf\local_storage.c |
Create Date:2022-07-28 13:14:18 |
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_map_alloc
Proto:static struct bpf_map *cgroup_storage_map_alloc(union bpf_attr *attr)
Type:struct bpf_map
Parameter:
Type | Parameter | Name |
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union bpf_attr * | attr |
273 | numa_node = bpf_map_attr_numa_node(attr) |
278 | If size of key in bytes != sizeof(structbpf_cgroup_storage_key) Then Return ERR_PTR( - EINVAL) |
281 | If size of value in bytes == 0 Then Return ERR_PTR( - EINVAL) |
284 | If size of value in bytes > PAGE_SIZE Then Return ERR_PTR( - E2BIG) |
287 | If BPF_MAP_CREATE related * flags defined above. & ~LOCAL_STORAGE_CREATE_FLAG_MASK || Not bpf_map_flags_access_ok( BPF_MAP_CREATE related * flags defined above.) Then Return ERR_PTR( - EINVAL) |
291 | If max number of entries in a map Then Return ERR_PTR( - EINVAL) |
295 | ret = bpf_map_charge_init( & mem, sizeof(structbpf_cgroup_storage_map)) |
299 | map = kmalloc_node(sizeof(structbpf_cgroup_storage_map), __GFP_ZERO | GFP_USER, numa_node) |
301 | If Not map Then |
302 | bpf_map_charge_finish( & mem) |
306 | bpf_map_charge_move( & memory, & mem) |
309 | bpf_map_init_from_attr( & map, attr) |
311 | Process spin lock initialization( & lock) |
312 | root = |
315 | Return map |
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