diff options
Diffstat (limited to 'include/linux/bpf.h')
| -rw-r--r-- | include/linux/bpf.h | 33 |
1 files changed, 29 insertions, 4 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h index b065de2cfcea..18b592fde896 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -355,6 +355,34 @@ static inline u32 btf_field_type_align(enum btf_field_type type) } } +static inline void bpf_obj_init_field(const struct btf_field *field, void *addr) +{ + memset(addr, 0, field->size); + + switch (field->type) { + case BPF_REFCOUNT: + refcount_set((refcount_t *)addr, 1); + break; + case BPF_RB_NODE: + RB_CLEAR_NODE((struct rb_node *)addr); + break; + case BPF_LIST_HEAD: + case BPF_LIST_NODE: + INIT_LIST_HEAD((struct list_head *)addr); + break; + case BPF_RB_ROOT: + /* RB_ROOT_CACHED 0-inits, no need to do anything after memset */ + case BPF_SPIN_LOCK: + case BPF_TIMER: + case BPF_KPTR_UNREF: + case BPF_KPTR_REF: + break; + default: + WARN_ON_ONCE(1); + return; + } +} + static inline bool btf_record_has_field(const struct btf_record *rec, enum btf_field_type type) { if (IS_ERR_OR_NULL(rec)) @@ -369,10 +397,7 @@ static inline void bpf_obj_init(const struct btf_record *rec, void *obj) if (IS_ERR_OR_NULL(rec)) return; for (i = 0; i < rec->cnt; i++) - memset(obj + rec->fields[i].offset, 0, rec->fields[i].size); - - if (rec->refcount_off >= 0) - refcount_set((refcount_t *)(obj + rec->refcount_off), 1); + bpf_obj_init_field(&rec->fields[i], obj + rec->fields[i].offset); } /* 'dst' must be a temporary buffer and should not point to memory that is being |