diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/bpf.h | 15 | ||||
| -rw-r--r-- | include/linux/filter.h | 2 |
2 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h index 6af8b2db8b15..0d7b70124d81 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -991,6 +991,21 @@ static inline bool bpf_pseudo_func(const struct bpf_insn *insn) return bpf_is_ldimm64(insn) && insn->src_reg == BPF_PSEUDO_FUNC; } +/* Given a BPF_ATOMIC instruction @atomic_insn, return true if it is an + * atomic load or store, and false if it is a read-modify-write instruction. + */ +static inline bool +bpf_atomic_is_load_store(const struct bpf_insn *atomic_insn) +{ + switch (atomic_insn->imm) { + case BPF_LOAD_ACQ: + case BPF_STORE_REL: + return true; + default: + return false; + } +} + struct bpf_prog_ops { int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr, union bpf_attr __user *uattr); diff --git a/include/linux/filter.h b/include/linux/filter.h index 02dda5c53d91..590476743f7a 100644 --- a/include/linux/filter.h +++ b/include/linux/filter.h @@ -364,6 +364,8 @@ static inline bool insn_is_cast_user(const struct bpf_insn *insn) * BPF_XOR | BPF_FETCH src_reg = atomic_fetch_xor(dst_reg + off16, src_reg); * BPF_XCHG src_reg = atomic_xchg(dst_reg + off16, src_reg) * BPF_CMPXCHG r0 = atomic_cmpxchg(dst_reg + off16, r0, src_reg) + * BPF_LOAD_ACQ dst_reg = smp_load_acquire(src_reg + off16) + * BPF_STORE_REL smp_store_release(dst_reg + off16, src_reg) */ #define BPF_ATOMIC_OP(SIZE, OP, DST, SRC, OFF) \ |