bpf: Add ambient BPF runtime context stored in current

[linux-2.6-microblaze.git] / include / linux / bpf-cgroup.h

diff --git a/include/linux/bpf-cgroup.h b/include/linux/bpf-cgroup.h
index 8b77d08..a74cd1c 100644 (file)
--- a/include/linux/bpf-cgroup.h
+++ b/include/linux/bpf-cgroup.h
@@ -27,19 +27,6 @@ struct task_struct;
 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++)
 
@@ -172,44 +159,6 @@ static inline enum bpf_cgroup_storage_type cgroup_storage_type(
        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);
@@ -487,9 +436,6 @@ static inline int cgroup_bpf_prog_query(const union bpf_attr *attr,
        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(