Comments (3)
The kernel space already works for sure but I just sent a pull request to support bpf_spin_lock from user space #473
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The library should support this today, but this feature requires BTF map definitions to be used, with __type()
macros for key and value types. A snippet from the kernel's selftests for posterity:
# tools/testing/selftests/bpf/progs/test_spin_lock.c
struct bpf_vqueue {
struct bpf_spin_lock lock;
...
};
struct {
__uint(type, BPF_MAP_TYPE_ARRAY);
__uint(max_entries, 1);
__type(key, int);
__type(value, struct bpf_vqueue);
} vqueue SEC(".maps");
int bpf_sping_lock_test(struct __sk_buff *skb) {
...
q = bpf_map_lookup_elem(&vqueue, &key);
...
bpf_spin_lock(&q->lock);
...
bpf_spin_unlock(&q->lock);
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Added with eced84a
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Related Issues (20)
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