diff options
| author | Leon Hwang <leon.hwang@linux.dev> | 2026-01-07 05:20:16 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-01-07 07:48:32 +0300 |
| commit | 2b421662c7887a0649fe409155a1f101562d0fa9 (patch) | |
| tree | b7cca23b038d790a105c94d23e9b8ffbec1f5f24 /include/linux | |
| parent | a8d506759231124efb911a3bd14d1ec2d9de15a1 (diff) | |
| download | linux-2b421662c7887a0649fe409155a1f101562d0fa9.tar.xz | |
bpf: Introduce BPF_F_CPU and BPF_F_ALL_CPUS flags
Introduce BPF_F_CPU and BPF_F_ALL_CPUS flags and check them for
following APIs:
* 'map_lookup_elem()'
* 'map_update_elem()'
* 'generic_map_lookup_batch()'
* 'generic_map_update_batch()'
And, get the correct value size for these APIs.
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Leon Hwang <leon.hwang@linux.dev>
Link: https://lore.kernel.org/r/20260107022022.12843-2-leon.hwang@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/bpf.h | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h index a63e47d2109c..108bab1bda9d 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -3915,14 +3915,35 @@ bpf_prog_update_insn_ptrs(struct bpf_prog *prog, u32 *offsets, void *image) } #endif +static inline bool bpf_map_supports_cpu_flags(enum bpf_map_type map_type) +{ + return false; +} + static inline int bpf_map_check_op_flags(struct bpf_map *map, u64 flags, u64 allowed_flags) { - if (flags & ~allowed_flags) + u32 cpu; + + if ((u32)flags & ~allowed_flags) return -EINVAL; if ((flags & BPF_F_LOCK) && !btf_record_has_field(map->record, BPF_SPIN_LOCK)) return -EINVAL; + if (!(flags & BPF_F_CPU) && flags >> 32) + return -EINVAL; + + if (flags & (BPF_F_CPU | BPF_F_ALL_CPUS)) { + if (!bpf_map_supports_cpu_flags(map->map_type)) + return -EINVAL; + if ((flags & BPF_F_CPU) && (flags & BPF_F_ALL_CPUS)) + return -EINVAL; + + cpu = flags >> 32; + if ((flags & BPF_F_CPU) && cpu >= num_possible_cpus()) + return -ERANGE; + } + return 0; } |