extern struct static_key_false cgroup_bpf_enabled_key[MAX_BPF_ATTACH_TYPE];
#define cgroup_bpf_enabled(type) static_branch_unlikely(&cgroup_bpf_enabled_key[type])
-#define BPF_CGROUP_STORAGE_NEST_MAX 8
-
-struct bpf_cgroup_storage_info {
- struct task_struct *task;
- struct bpf_cgroup_storage *storage[MAX_BPF_CGROUP_STORAGE_TYPE];
-};
-
-/* For each cpu, permit maximum BPF_CGROUP_STORAGE_NEST_MAX number of tasks
- * to use bpf cgroup storage simultaneously.
- */
-DECLARE_PER_CPU(struct bpf_cgroup_storage_info,
- bpf_cgroup_storage_info[BPF_CGROUP_STORAGE_NEST_MAX]);
-
#define for_each_cgroup_storage_type(stype) \
for (stype = 0; stype < MAX_BPF_CGROUP_STORAGE_TYPE; stype++)
return BPF_CGROUP_STORAGE_SHARED;
}
-static inline int bpf_cgroup_storage_set(struct bpf_cgroup_storage
- *storage[MAX_BPF_CGROUP_STORAGE_TYPE])
-{
- enum bpf_cgroup_storage_type stype;
- int i, err = 0;
-
- preempt_disable();
- for (i = 0; i < BPF_CGROUP_STORAGE_NEST_MAX; i++) {
- if (unlikely(this_cpu_read(bpf_cgroup_storage_info[i].task) != NULL))
- continue;
-
- this_cpu_write(bpf_cgroup_storage_info[i].task, current);
- for_each_cgroup_storage_type(stype)
- this_cpu_write(bpf_cgroup_storage_info[i].storage[stype],
- storage[stype]);
- goto out;
- }
- err = -EBUSY;
- WARN_ON_ONCE(1);
-
-out:
- preempt_enable();
- return err;
-}
-
-static inline void bpf_cgroup_storage_unset(void)
-{
- int i;
-
- for (i = 0; i < BPF_CGROUP_STORAGE_NEST_MAX; i++) {
- if (unlikely(this_cpu_read(bpf_cgroup_storage_info[i].task) != current))
- continue;
-
- this_cpu_write(bpf_cgroup_storage_info[i].task, NULL);
- return;
- }
-}
-
struct bpf_cgroup_storage *
cgroup_storage_lookup(struct bpf_cgroup_storage_map *map,
void *key, bool locked);
return -EINVAL;
}
-static inline int bpf_cgroup_storage_set(
- struct bpf_cgroup_storage *storage[MAX_BPF_CGROUP_STORAGE_TYPE]) { return 0; }
-static inline void bpf_cgroup_storage_unset(void) {}
static inline int bpf_cgroup_storage_assign(struct bpf_prog_aux *aux,
struct bpf_map *map) { return 0; }
static inline struct bpf_cgroup_storage *bpf_cgroup_storage_alloc(