diff options
Diffstat (limited to 'include/linux/bpf.h')
| -rw-r--r-- | include/linux/bpf.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h index 0c216e71cec7..8888689aa917 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -203,6 +203,7 @@ enum btf_field_type { BPF_GRAPH_ROOT = BPF_RB_ROOT | BPF_LIST_HEAD, BPF_REFCOUNT = (1 << 9), BPF_WORKQUEUE = (1 << 10), + BPF_UPTR = (1 << 11), }; typedef void (*btf_dtor_kfunc_t)(void *); @@ -322,6 +323,8 @@ static inline const char *btf_field_type_name(enum btf_field_type type) return "kptr"; case BPF_KPTR_PERCPU: return "percpu_kptr"; + case BPF_UPTR: + return "uptr"; case BPF_LIST_HEAD: return "bpf_list_head"; case BPF_LIST_NODE: @@ -350,6 +353,7 @@ static inline u32 btf_field_type_size(enum btf_field_type type) case BPF_KPTR_UNREF: case BPF_KPTR_REF: case BPF_KPTR_PERCPU: + case BPF_UPTR: return sizeof(u64); case BPF_LIST_HEAD: return sizeof(struct bpf_list_head); @@ -379,6 +383,7 @@ static inline u32 btf_field_type_align(enum btf_field_type type) case BPF_KPTR_UNREF: case BPF_KPTR_REF: case BPF_KPTR_PERCPU: + case BPF_UPTR: return __alignof__(u64); case BPF_LIST_HEAD: return __alignof__(struct bpf_list_head); @@ -419,6 +424,7 @@ static inline void bpf_obj_init_field(const struct btf_field *field, void *addr) case BPF_KPTR_UNREF: case BPF_KPTR_REF: case BPF_KPTR_PERCPU: + case BPF_UPTR: break; default: WARN_ON_ONCE(1); @@ -507,6 +513,25 @@ static inline void copy_map_value_long(struct bpf_map *map, void *dst, void *src bpf_obj_memcpy(map->record, dst, src, map->value_size, true); } +static inline void bpf_obj_swap_uptrs(const struct btf_record *rec, void *dst, void *src) +{ + unsigned long *src_uptr, *dst_uptr; + const struct btf_field *field; + int i; + + if (!btf_record_has_field(rec, BPF_UPTR)) + return; + + for (i = 0, field = rec->fields; i < rec->cnt; i++, field++) { + if (field->type != BPF_UPTR) + continue; + + src_uptr = src + field->offset; + dst_uptr = dst + field->offset; + swap(*src_uptr, *dst_uptr); + } +} + static inline void bpf_obj_memzero(struct btf_record *rec, void *dst, u32 size) { u32 curr_off = 0; |