BPF_F_HDR_FIELD_MASK 1878 net/core/filter.c if (unlikely(flags & ~(BPF_F_HDR_FIELD_MASK))) BPF_F_HDR_FIELD_MASK 1886 net/core/filter.c switch (flags & BPF_F_HDR_FIELD_MASK) { BPF_F_HDR_FIELD_MASK 1926 net/core/filter.c BPF_F_PSEUDO_HDR | BPF_F_HDR_FIELD_MASK))) BPF_F_HDR_FIELD_MASK 1937 net/core/filter.c switch (flags & BPF_F_HDR_FIELD_MASK) {